/* ============================================
   RuDao V2 - Book Website Styles
   Theme: Confluence of Eastern philosophy & modern business
   Sections: Hero, Concept, Book, Contents (16 ch), Editions,
   Pillars, Principles, Compare, Lineage+Quotes, Author, Pre-Order
   ============================================ */

:root {
    /* Color palette - inspired by ink, vermillion seal, and aged paper */
    --ink-black: #0a0a0a;
    --ink-soft: #1a1a1a;
    --ink-mid: #3a3a3a;
    --paper: #faf7f0;
    --paper-warm: #f3ede1;
    --paper-shadow: #e8e0cf;
    --vermillion: #a93226;
    --vermillion-deep: #7d2419;
    --gold: #b8923a;
    --gold-soft: #c9a961;
    --gray: #6b6b6b;
    --gray-light: #a8a8a8;

    /* Typography */
    --font-serif-en: 'Lugrasimo', 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Lugrasimo', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Merriweather', 'Noto Serif TC', 'Noto Serif SC', Georgia, 'Times New Roman', serif;
    --font-cn: 'Ma Shan Zheng', 'Noto Serif SC', serif;
    --font-cn-body: 'Noto Serif TC', 'Noto Serif SC', serif;
    --font-brush: 'Ma Shan Zheng', 'Lugrasimo', cursive;

    /* Layout */
    --container: 1240px;
    --section-py: clamp(5rem, 10vw, 8rem);
    --radius: 4px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5.5rem;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    color: var(--ink-soft);
    background: var(--paper);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 4vw, 3rem);
}

.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0);
    white-space: nowrap; border: 0;
}

/* ============================================
   AUDIOBOOK INTRO BAR (NEW V4)
   ============================================ */
/* ============================================
   HERO AUDIO PLAYERS (prominent, in hero section)
   ============================================ */
.hero-audio-group {
    position: relative;
    z-index: 5;
    margin: 2rem 0 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}
.hero-audio {
    position: relative;
    transition: max-height .4s ease, opacity .3s ease, margin .3s ease;
    overflow: hidden;
    width: 100%;
    max-width: 680px;
}
.hero-audio.dismissed {
    max-height: 0 !important;
    opacity: 0;
    margin: 0;
    pointer-events: none;
}
.hero-audio-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.1rem 1.5rem;
    background: rgba(250, 247, 240, 0.95);
    border: 1.5px solid rgba(185, 146, 58, 0.35);
    border-radius: 16px;
    box-shadow: 0 8px 32px -8px rgba(10, 10, 10, 0.12);
    backdrop-filter: blur(8px);
    flex-wrap: wrap;
    max-width: 680px;
    margin: 0 auto;
}
.hero-audio-play {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px; height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--vermillion) 0%, #c0392b 100%);
    color: var(--paper);
    flex-shrink: 0;
    transition: all .25s ease;
    box-shadow: 0 4px 18px -4px rgba(169, 50, 38, 0.5);
    cursor: pointer;
    border: none;
    outline: none;
}
.hero-audio-play:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px -4px rgba(169, 50, 38, 0.6);
}
.hero-audio-play:active {
    transform: scale(1.05);
}
.hero-audio-play:focus-visible {
    box-shadow: 0 0 0 3px rgba(169, 50, 38, 0.3), 0 4px 18px -4px rgba(169, 50, 38, 0.5);
}
.hero-audio-play.playing {
    background: linear-gradient(135deg, var(--gold-soft) 0%, #b8941f 100%);
    color: var(--ink-black);
    box-shadow: 0 4px 18px -4px rgba(185, 146, 58, 0.5);
}
.hero-audio-play .icon-pulse {
    animation: audioPulse 1.5s ease-in-out infinite;
}
@keyframes audioPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(169, 50, 38, 0.4); }
    50% { box-shadow: 0 0 0 12px rgba(169, 50, 38, 0); }
}
.hero-audio-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    text-align: left;
    flex: 1;
    min-width: 0;
}
.hero-audio-label {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    color: var(--vermillion);
    white-space: nowrap;
}
.hero-audio-title {
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--ink-mid);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.hero-audio-hint {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--vermillion);
    opacity: 0.7;
    white-space: nowrap;
    transition: opacity .3s ease;
}
.hero-audio-hint.hidden {
    opacity: 0;
}
.hero-audio-progress-wrap {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    min-width: 120px;
    max-width: 300px;
}
.audio-time {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--ink-mid);
    white-space: nowrap;
    min-width: 32px;
    text-align: center;
}
.audio-progress {
    flex: 1;
    height: 5px;
    background: rgba(10, 10, 10, 0.08);
    border-radius: 3px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: height .2s ease;
}
.audio-progress:hover { height: 7px; }
.audio-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(to right, var(--vermillion), var(--gold-soft));
    border-radius: 3px;
    transition: width .15s linear;
}
.audio-dismiss {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px; height: 28px;
    border-radius: 50%;
    color: var(--ink-mid);
    transition: all .2s ease;
    flex-shrink: 0;
}
.audio-dismiss:hover {
    color: var(--vermillion);
    background: rgba(169, 50, 38, 0.08);
}

/* ---------- Hero video card · 新书宣传视频 ---------- */
.hero-video-card {
    margin-top: 1.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.55rem;
}
.hero-video-card video {
    display: block;
    width: min(310px, 74vw);
    height: auto;
    aspect-ratio: 9 / 16;
    object-fit: cover;
    background: #000;
    border-radius: 16px;
    border: 1px solid rgba(184, 146, 58, 0.55);
    box-shadow: 0 18px 46px rgba(10, 10, 10, 0.4), 0 4px 14px rgba(169, 50, 38, 0.25);
    cursor: pointer;
}
/* Desktop: keep the video compact on large screens */
@media (min-width: 861px) {
    .hero-video-card video {
        width: 250px;
        max-height: 62vh;
    }
}
.hero-video-label {
    margin: 0;
    font-size: 0.82rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--vermillion);
    font-weight: 600;
}
.hero-video-hint {
    margin: 0;
    font-size: 0.72rem;
    color: var(--gray);
    letter-spacing: 0.05em;
}


/* Responsive audio bar */
@media (max-width: 860px) {
    .audio-intro-inner {
        flex-wrap: wrap;
        gap: 0.5rem;
        padding: 0.5rem clamp(1rem, 4vw, 2rem);
    }
    .audio-title {
        font-size: 0.75rem;
        white-space: normal;
    }
    .audio-progress-wrap {
        max-width: 100%;
        width: 100%;
        order: 3;
        flex-basis: 100%;
    }
}
@media (max-width: 520px) {
    .audio-intro-left {
        flex: 1;
        min-width: 0;
    }
    .audio-info {
        overflow: hidden;
    }
    .audio-title {
        font-size: 0.7rem;
    }
}

/* ============================================
   BLOG ALERT BANNER
   ============================================ */
.blog-alert {
    position: relative;
    width: 100%;
    background: var(--vermillion);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.45rem 3rem 0.45rem 1rem;
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 0.88rem;
    line-height: 1.5;
    transition: max-height .3s ease, padding .3s ease, opacity .3s ease;
}
.blog-alert.dismissed {
    max-height: 0;
    padding: 0;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
}
.blog-alert-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: inherit;
    text-decoration: none;
    text-align: center;
}
.blog-alert-link:hover {
    text-decoration: underline;
    text-underline-offset: 2px;
}
.blog-alert-icon {
    font-size: 1rem;
    opacity: 0.9;
    flex-shrink: 0;
}
.blog-alert-text strong {
    font-weight: 600;
    letter-spacing: 0.02em;
}
.blog-alert-close {
    position: absolute;
    right: 0.6rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.8rem;
    height: 1.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.15);
    border-radius: 50%;
    color: #fff;
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
    border: none;
    transition: background .2s ease;
}
.blog-alert-close:hover {
    background: rgba(255,255,255,0.3);
}
@media (max-width: 640px) {
    .blog-alert {
        font-size: 0.78rem;
        padding: 0.4rem 2.6rem 0.4rem 0.8rem;
    }
    .blog-alert-icon { display: none; }
}

/* ============================================
   NAV
   ============================================ */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(250, 247, 240, 0.92);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color .3s ease, background .3s ease;
}
.nav.scrolled {
    border-bottom-color: rgba(10,10,10,0.08);
    background: rgba(250, 247, 240, 0.97);
}
.nav-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0.8rem clamp(1.5rem, 4vw, 3rem);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}
.nav-brand {
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
}
.brand-en {
    font-family: 'Lugrasimo', cursive;
    font-size: 1.7rem;
    color: var(--ink-black);
    letter-spacing: -0.02em;
}
.brand-cn {
    font-family: var(--font-cn);
    font-size: 1.2rem;
    color: var(--vermillion);
}
.brand-by {
    font-family: var(--font-serif-en);
    font-size: 0.75rem;
    color: var(--ink-mid);
    letter-spacing: 0.02em;
    white-space: nowrap;
}
/* Top bar brand: small plain Georgia "RuDao" */
.nav-brand .brand-en {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.15rem;
    font-weight: 400;
    letter-spacing: 0.01em;
    transition: color .2s ease;
}
.nav-brand .brand-cn {
    font-family: var(--font-cn-body);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--vermillion);
    transition: color .2s ease;
}
.nav-brand:hover .brand-en { color: var(--vermillion); }
.nav-links {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}
.nav-links a {
    display: inline-block;
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    font-family: var(--font-body);
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--ink-black);
    text-decoration: none;
    transition: color .2s ease, background-color .2s ease;
    position: relative;
    white-space: nowrap;
    cursor: pointer;
}
.nav-links a::after {
    content: '';
    position: absolute;
    left: 0.75rem; right: 0.75rem; bottom: 0.15rem;
    height: 1px;
    background: var(--vermillion);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .3s ease;
}
.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--vermillion);
    background-color: rgba(169, 50, 38, 0.07);
}
.nav-links a:hover::after,
.nav-links a:focus-visible::after { transform: scaleX(1); }

/* ---------- TOC 目录 dropdown ---------- */
.nav-dropdown { position: relative; display: inline-block; }
.nav-dropbtn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.45rem 0.75rem;
    border: 0;
    border-radius: 999px;
    background: none;
    font-family: var(--font-body);
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--ink-black);
    white-space: nowrap;
    cursor: pointer;
    transition: color .2s ease, background-color .2s ease;
}
.nav-dropbtn:hover,
.nav-dropbtn:focus-visible,
.nav-dropdown.open .nav-dropbtn {
    color: var(--vermillion);
    background-color: rgba(169, 50, 38, 0.07);
}
.nav-caret {
    font-size: 0.62rem;
    line-height: 1;
    transition: transform .25s ease;
}
.nav-dropdown.open .nav-caret { transform: rotate(180deg); }

.nav-dropmenu {
    position: absolute;
    top: calc(100% + 0.55rem);
    right: 0;
    width: min(94vw, 720px);
    max-height: min(88vh, 820px);
    overflow-y: auto;
    overscroll-behavior: contain;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.05rem 0.8rem;
    padding: 0.7rem 0.8rem;
    background: var(--paper-warm);
    border: 1px solid rgba(169, 50, 38, 0.28);
    border-radius: 12px;
    box-shadow: 0 20px 44px -18px rgba(10, 10, 10, 0.32);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
    z-index: 130;
    text-align: left;
    -webkit-overflow-scrolling: touch;
}
.nav-dropdown.open .nav-dropmenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
@media (hover: hover) and (pointer: fine) {
    .nav-dropdown:hover .nav-dropmenu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    .nav-dropdown:hover .nav-caret { transform: rotate(180deg); }
    .nav-dropdown:hover .nav-dropbtn {
        color: var(--vermillion);
        background-color: rgba(169, 50, 38, 0.07);
    }
}

.nav-links .nav-dropfull,
.nav-links .nav-dropitem {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    padding: 0.22rem 0.5rem;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.77rem;
    font-weight: 500;
    line-height: 1.3;
    letter-spacing: 0;
    color: var(--ink-black);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: background-color .15s ease, color .15s ease;
}
.nav-links .nav-dropfull {
    grid-column: 1 / -1;
    margin-bottom: 0.35rem;
    padding: 0.26rem 0.5rem 0.5rem;
    border-radius: 0;
    border-bottom: 1px solid rgba(169, 50, 38, 0.18);
    color: var(--vermillion);
    font-weight: 700;
    letter-spacing: 0.02em;
}
.nav-links .nav-dropitem:hover,
.nav-links .nav-dropitem:focus-visible,
.nav-links .nav-dropfull:hover,
.nav-links .nav-dropfull:focus-visible {
    background-color: rgba(169, 50, 38, 0.08);
    color: var(--vermillion);
}
/* section group headings 0.0 – 7.0 */
.nav-links .nav-dropgroup {
    grid-column: 1 / -1;
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin: 0.38rem 0 0.1rem;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    background: rgba(169, 50, 38, 0.075);
    font-family: var(--font-body);
    font-size: 0.76rem;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: 0.01em;
    color: var(--vermillion);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: background-color .15s ease;
}
.nav-links .nav-dropgroup:hover,
.nav-links .nav-dropgroup:focus-visible { background-color: rgba(169, 50, 38, 0.15); }
.nav-links .nav-dropgroup .nav-dropnum { font-size: 0.73rem; }
.nav-links .nav-dropitem::after,
.nav-links .nav-dropfull::after,
.nav-links .nav-dropgroup::after { display: none; }
.nav-dropnum {
    flex-shrink: 0;
    min-width: 1.9rem;
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--vermillion);
}
.nav-droplabel {
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ============================================
   HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--paper);
    padding: 6rem 2rem 4rem;
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 30%, rgba(185, 146, 58, 0.08), transparent 70%),
        radial-gradient(ellipse 50% 40% at 80% 80%, rgba(169, 50, 38, 0.06), transparent 70%),
        var(--paper);
    z-index: 0;
}
.hero-bg::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(10,10,10,0.03) 1px, transparent 1px),
        radial-gradient(circle at 80% 70%, rgba(10,10,10,0.02) 1px, transparent 1px);
    background-size: 60px 60px, 90px 90px;
}

.hero-art {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    pointer-events: none;
}
.hero-calligraphy {
    width: min(85vw, 1100px);
    height: auto;
    max-height: 95vh;
    opacity: 0.10;
    filter: grayscale(0.6) contrast(1.05);
    transform: rotate(-2deg);
    object-fit: contain;
    user-select: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 920px;
    /* flex-item guard: allow the block to shrink below the longest
       unbreakable text run, otherwise the hero overflows narrow screens */
    min-width: 0;
    width: 100%;
}
.hero-subtitle-en,
.hero-tagline,
.hero-subtitle-cn,
.hero-by {
    overflow-wrap: break-word;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--vermillion);
    margin-bottom: 2rem;
}
.eyebrow-line {
    width: 32px; height: 1px;
    background: var(--vermillion);
}

.hero-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 1.6rem;
}
.title-en {
    font-family: 'Lugrasimo', var(--font-brush);
    font-size: clamp(5rem, 14vw, 11rem);
    line-height: 0.95;
    color: var(--ink-black);
    letter-spacing: -0.02em;
    text-shadow: 0 4px 30px rgba(10,10,10,0.06);
}
.title-cn {
    font-family: var(--font-cn);
    font-weight: 900;
    font-size: clamp(3.5rem, 9vw, 6rem);
    line-height: 1;
    color: var(--vermillion);
    letter-spacing: 0.04em;
}
.title-by {
    font-family: var(--font-serif-en);
    font-size: clamp(1.2rem, 2.2vw, 1.8rem);
    color: var(--ink-mid);
    letter-spacing: 0.02em;
    margin-top: 0.5rem;
}
a.title-by {
    display: block;
    text-decoration: none;
    cursor: pointer;
    transition: color .2s ease;
}
a.title-by::after {
    content: ' →';
    font-size: 0.8em;
    opacity: 0;
    transition: opacity .2s ease;
}
a.title-by:hover { color: var(--vermillion); }
a.title-by:hover::after { opacity: 1; }

/* by-line shown just above the hero audio players */
.hero-by {
    font-family: var(--font-serif-en);
    font-size: clamp(0.95rem, 1.5vw, 1.15rem);
    letter-spacing: 0.06em;
    color: var(--ink-mid);
    margin: 1.5rem 0 0.7rem;
}
.hero-by a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid rgba(169, 50, 38, 0.35);
    padding-bottom: 2px;
    transition: color .2s ease, border-color .2s ease;
}
.hero-by a::after {
    content: ' →';
    font-size: 0.8em;
    opacity: 0;
    transition: opacity .2s ease;
}
.hero-by a:hover {
    color: var(--vermillion);
    border-color: var(--vermillion);
}
.hero-by a:hover::after { opacity: 1; }

.hero-subtitle-en {
    font-family: var(--font-serif-en);
    font-size: clamp(1.3rem, 2.8vw, 2rem);
    font-weight: 500;
    font-style: normal;
    letter-spacing: 0.01em;
    color: var(--ink-soft);
    margin-bottom: 0.4rem;
}
.hero-subtitle-cn {
    font-family: var(--font-cn-body);
    font-size: clamp(1rem, 1.6vw, 1.2rem);
    font-weight: 500;
    color: var(--ink-mid);
    margin-bottom: 1.6rem;
    letter-spacing: 0.06em;
}
.hero-tagline {
    font-family: var(--font-serif-en);
    font-size: clamp(1.05rem, 1.8vw, 1.35rem);
    font-weight: 400;
    line-height: 1.55;
    color: var(--ink-mid);
    max-width: 640px;
    margin: 0 auto 0.6rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--gray);
    z-index: 2;
}
.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--gray-light), transparent);
    animation: scrollPulse 2.4s ease-in-out infinite;
}
@keyframes scrollPulse {
    0%, 100% { opacity: 0.4; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.95rem 2rem;
    font-size: 0.92rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    border-radius: 999px;
    transition: all .25s ease;
    border: 1.5px solid transparent;
    white-space: nowrap;
}
.btn-primary {
    background: var(--ink-black);
    color: var(--paper);
}
.btn-primary:hover {
    background: var(--vermillion);
    transform: translateY(-2px);
    box-shadow: 0 12px 30px -8px rgba(169, 50, 38, 0.4);
}
.btn-ghost {
    background: transparent;
    color: var(--ink-black);
    border-color: rgba(10,10,10,0.25);
}
.btn-ghost:hover {
    border-color: var(--ink-black);
    background: var(--ink-black);
    color: var(--paper);
}
.btn-outline {
    background: transparent;
    color: var(--ink-black);
    border-color: rgba(10,10,10,0.2);
}
.btn-outline:hover {
    background: var(--ink-black);
    color: var(--paper);
    border-color: var(--ink-black);
}
.btn-amazon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, #FFA724 0%, #FF8800 100%);
    color: #111;
    font-weight: 600;
    border: 1.5px solid #e07b00;
    box-shadow: 0 4px 14px -4px rgba(255, 136, 0, 0.5);
    font-size: 1.05rem;
    padding: 1rem 2.2rem;
}
.btn-amazon:hover {
    background: linear-gradient(180deg, #FFB13D 0%, #FF9900 100%);
    transform: translateY(-2px);
    box-shadow: 0 14px 30px -8px rgba(255, 136, 0, 0.55);
    color: #111;
}
.btn-amazon:active {
    transform: translateY(0);
}

/* Pre-order CTA layout */
.preorder-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
    margin: 2rem 0 1.5rem;
}
.preorder-cta .btn { min-width: 200px; }
.preorder-amazon-note {
    font-size: 0.92rem;
    color: var(--ink-mid);
    margin: 0 0 1.5rem;
    line-height: 1.7;
}

/* ============================================
   SECTION SHARED
   ============================================ */
.section {
    padding: var(--section-py) 0;
    position: relative;
}
.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto clamp(3rem, 6vw, 5rem);
}
.section-num {
    display: inline-block;
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: 1rem;
    color: var(--vermillion);
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
}
.section-title {
    font-family: var(--font-serif-en);
    font-size: clamp(2.2rem, 4.5vw, 3.4rem);
    font-weight: 500;
    line-height: 1.15;
    color: var(--ink-black);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}
.section-subtitle {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: clamp(1.05rem, 1.6vw, 1.2rem);
    color: var(--ink-mid);
}
.section-subtitle em, em { font-style: italic; }
.section-title-cn {
    font-family: var(--font-cn);
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    color: var(--vermillion);
    margin-top: 0.2rem;
    margin-bottom: 0.6rem;
    line-height: 1.2;
}
.section-subtitle-cn {
    font-family: var(--font-cn);
    font-size: clamp(0.85rem, 1.3vw, 1.0rem);
    color: var(--ink-mid);
    margin-top: 0.2rem;
    line-height: 1.4;
}
.chap-h2-cn {
    font-family: var(--font-cn);
    font-size: clamp(0.9rem, 1.4vw, 1.05rem);
    color: var(--vermillion);
    margin-top: -0.4rem;
    margin-bottom: 0.8rem;
    line-height: 1.3;
}
.chap-h3-cn {
    font-family: var(--font-cn);
    font-size: clamp(0.8rem, 1.2vw, 0.92rem);
    color: var(--ink-mid);
    margin-top: -0.3rem;
    margin-bottom: 0.6rem;
    line-height: 1.3;
}
.section-anchor {
    font-family: var(--font-sans);
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: var(--vermillion);
    text-decoration: none;
    margin-left: 0.6rem;
    opacity: 0.25;
    transition: opacity .25s ease;
    vertical-align: middle;
    cursor: pointer;
}
.section-anchor:hover {
    opacity: 1;
}

/* ============================================
   CONCEPT
   ============================================ */
.concept { background: var(--paper); }
.concept-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: stretch;
    margin-bottom: 4rem;
}
.concept-card {
    padding: clamp(2rem, 4vw, 3rem);
    border-radius: 8px;
    transition: transform .4s ease;
}
.concept-card-light {
    background: var(--paper-warm);
    border: 1px solid var(--paper-shadow);
}
.concept-card-dark {
    background: var(--ink-black);
    color: var(--paper);
}
.card-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-bottom: 0.4rem;
}
.concept-card-light .card-label { color: var(--vermillion); }
.concept-card-dark .card-label { color: var(--gold-soft); }
.card-cn {
    font-family: var(--font-cn);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    letter-spacing: 0.08em;
}
.concept-card-dark .card-cn { color: var(--gold-soft); }
.concept-card h3 {
    font-family: var(--font-serif-en);
    font-size: clamp(1.5rem, 2.4vw, 2rem);
    font-weight: 500;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}
.concept-card p {
    font-size: 1rem;
    line-height: 1.7;
    opacity: 0.9;
}

.concept-divider {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    width: 70px;
    position: relative;
}
.divider-en {
    font-family: var(--font-body);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--gray);
    background: var(--paper);
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    z-index: 2;
}
.divider-cn {
    font-family: var(--font-brush);
    font-size: 3rem;
    color: var(--vermillion);
    background: var(--paper);
    padding: 1rem 0.4rem;
    border-radius: 50%;
    box-shadow: 0 0 0 8px var(--paper);
    z-index: 2;
}
.concept-divider::before {
    content: '';
    position: absolute;
    left: 0; right: 0;
    top: 50%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--vermillion), transparent);
}

.quote-block {
    max-width: 820px;
    margin: 0.7rem auto;
    text-align: center;
    padding: 0.7rem 1.2rem;
    position: relative;
}
.quote {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: clamp(1.3rem, 2.4vw, 1.8rem);
    font-weight: 400;
    line-height: 1.35;
    color: var(--ink-black);
    margin-bottom: 0.35rem;
}
.quote-attr {
    font-size: 0.85rem;
    color: var(--gray);
    letter-spacing: 0.05em;
    line-height: 1.3;
}

/* ============================================
   CONCEPT — framed I. A New Way to Win
   Vermillion frame, matching .preface-frame / .qijing-frame
   ============================================ */
.concept-frame {
    position: relative;
    padding: clamp(2.2rem, 4vw, 3.4rem) clamp(1.6rem, 3.4vw, 3rem) clamp(1.8rem, 3.2vw, 2.6rem);
    border: 1px solid rgba(169, 50, 38, 0.38);
    border-radius: 14px;
    background: rgba(169, 50, 38, 0.028);
}
.concept-frame::before {
    content: '';
    position: absolute;
    inset: 6px;
    border: 1px dashed rgba(169, 50, 38, 0.20);
    border-radius: 10px;
    pointer-events: none;
}
.concept-frame .section-head { margin-bottom: clamp(2.6rem, 5vw, 4.2rem); }
.concept-frame .concept-grid { margin-bottom: clamp(1.2rem, 3vw, 2.4rem); }
.concept-frame .quote-block { padding: 0.6rem 1rem 0.3rem; }
@media (max-width: 640px) {
    .concept-frame { padding: 1.6rem 0.9rem 1.2rem; }
    .concept-frame::before { inset: 4px; }
    .concept-frame .quote-block { padding: 0.4rem 0.2rem 0.2rem; }
}

/* ============================================
   THE BOOK
   ============================================ */
.book { background: var(--paper-warm); }
.book-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: clamp(2.5rem, 6vw, 5rem);
    align-items: center;
}

.book-art {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    perspective: 1500px;
}
/* keeps the cover + its ground shadow together, above the author portrait */
.book-cover-stack {
    position: relative;
    display: flex;
    justify-content: center;
}
.book-cover-real {
    position: relative;
    width: min(380px, 85vw);
    transform: rotateY(-14deg) rotateX(2deg);
    transform-style: preserve-3d;
    transition: transform .8s ease;
    filter: drop-shadow(20px 30px 50px rgba(10,10,10,0.3));
}
.book-cover-real:hover {
    transform: rotateY(-6deg) rotateX(1deg) translateY(-8px);
}
.book-cover-real img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
}
.book-shadow {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 30px;
    background: radial-gradient(ellipse, rgba(10,10,10,0.25), transparent 70%);
    filter: blur(10px);
    z-index: -1;
}

.book-info { padding-top: 1rem; }
.book-info .section-num { margin-bottom: 0.8rem; }
.book-info .section-title { text-align: left; }
.book-lead {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: clamp(1.15rem, 1.7vw, 1.35rem);
    color: var(--ink-black);
    margin: 1.5rem 0 1.5rem;
    line-height: 1.5;
}
.book-info p {
    font-size: 1.02rem;
    line-height: 1.75;
    margin-bottom: 1.1rem;
    color: var(--ink-mid);
}
.book-info p strong { color: var(--ink-black); font-weight: 600; }
.book-info p em { color: var(--vermillion); font-style: italic; font-weight: 500; }

.book-meta {
    list-style: none;
    margin-top: 2.2rem;
    border-top: 1px solid rgba(10,10,10,0.1);
}
.book-meta li {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 1rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(10,10,10,0.06);
    font-size: 0.95rem;
}
.book-meta span {
    color: var(--gray);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding-top: 2px;
}
.book-meta strong { color: var(--ink-black); font-weight: 500; }

/* Author portrait — sits directly under the book cover in About the Book */
.book-art .book-author-figure {
    width: min(380px, 85vw);
    margin: clamp(1.5rem, 2.8vw, 2rem) 0 0;
    padding-top: 0;
    border-top: 0;
}

/* Book details (meta list + copyright notice) — sits directly under the author
   portrait, lines set very tight (line-height 1) */
.book-details {
    width: min(380px, 85vw);
    margin-top: clamp(1rem, 2vw, 1.4rem);
    line-height: 1;
}
.book-details .book-meta {
    margin-top: 0;
    line-height: 1;
}
.book-details .book-meta li {
    grid-template-columns: 116px 1fr;
    gap: 0.55rem;
    padding: 0.3rem 0;
    font-size: 0.86rem;
    line-height: 1;
}
.book-details .book-meta span {
    font-size: 0.6rem;
    letter-spacing: 0.05em;
    white-space: nowrap;
    padding-top: 0;
    line-height: 1;
}
.book-details .book-meta strong { line-height: 1; }
.book-details .book-copyright {
    margin: 0.45rem 0 0;
    max-width: none;
    font-size: 6px;
    line-height: 1;
}
.book-details .book-copyright-legal {
    font-size: 6.5px;
    line-height: 1;
}
/* (legacy placement, in case the figure is ever moved back into .book-info) */
.book-author-figure {
    display: flex;
    align-items: flex-end;
    gap: 1.1rem;
    margin: clamp(1.6rem, 3vw, 2.2rem) 0 0;
    padding-top: clamp(1.2rem, 2.4vw, 1.6rem);
    border-top: 1px dashed rgba(169, 50, 38, 0.3);
}
.book-author-figure img {
    display: block;
    flex: 0 0 auto;
    width: 100%;
    max-width: 128px;          /* small byline portrait on desktop */
    aspect-ratio: 4 / 5;
    object-fit: cover;
    object-position: center 22%;
    border-radius: 5px;
    border: 1px solid rgba(169, 50, 38, 0.22);
    box-shadow: 0 6px 16px -10px rgba(10, 10, 10, 0.38);
}
.book-author-figure figcaption {
    margin-top: 0;
    max-width: 24rem;
    padding-bottom: 0.15rem;
    font-family: var(--font-body);
    font-size: 0.84rem;
    font-style: italic;
    letter-spacing: 0.02em;
    color: var(--gray);
}
.book-author-figure figcaption em { color: var(--vermillion); font-style: italic; }
@media (max-width: 640px) {
    .book-author-figure { display: block; }
    .book-author-figure img { max-width: 100%; }
    .book-author-figure figcaption { margin-top: 0.75rem; max-width: none; }
}

/* Book quote block — long Chinese + English description (NEW V3) */
.book-quote {
    margin: 1.5rem 0 1.8rem;
    padding: 1.4rem 1.6rem;
    background: rgba(169, 50, 38, 0.04);
    border-left: 3px solid var(--vermillion);
    border-radius: 0 6px 6px 0;
    position: relative;
}
.book-quote-cn {
    font-family: var(--font-cn-body);
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--ink-mid);
    margin-bottom: 1rem;
}
.book-quote-en {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--ink-mid);
    padding-top: 0.8rem;
    border-top: 1px solid rgba(10,10,10,0.08);
}

/* ============================================
   TABLE OF CONTENTS (NEW V2)
   ============================================ */
.contents {
    background: var(--paper);
    position: relative;
}
.contents::before {
    content: '\5112\9053';
    position: absolute;
    top: 5%;
    right: 3%;
    font-family: var(--font-cn);
    font-weight: 900;
    font-size: clamp(8rem, 22vw, 18rem);
    color: var(--vermillion);
    opacity: 0.03;
    pointer-events: none;
    user-select: none;
}

.toc-part {
    margin-bottom: clamp(2.5rem, 5vw, 4rem);
    position: relative;
}
.toc-part:last-child { margin-bottom: 0; }

.toc-part-header {
    text-align: center;
    margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--vermillion);
    position: relative;
}
.toc-part-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--vermillion);
}

.toc-part-alt .toc-part-header {
    border-bottom-color: var(--gold);
}
.toc-part-alt .toc-part-header::after {
    background: var(--gold);
}

.toc-part-num {
    display: inline-block;
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: 0.95rem;
    color: var(--vermillion);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 0.6rem;
}
.toc-part-alt .toc-part-num { color: var(--gold); }

.toc-part-title {
    font-family: var(--font-cn);
    font-weight: 700;
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    color: var(--ink-black);
    margin-bottom: 0.6rem;
    letter-spacing: 0.04em;
}
.toc-part-desc {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: clamp(0.95rem, 1.3vw, 1.1rem);
    color: var(--ink-mid);
    max-width: 600px;
    margin: 0 auto;
}

.toc-chapters {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.toc-chapter {
    display: grid;
    grid-template-columns: 64px 1fr;
    gap: 1.2rem;
    padding: 1.4rem 1.5rem;
    background: var(--paper-warm);
    border: 1px solid var(--paper-shadow);
    border-radius: 8px;
    transition: all .3s ease;
    position: relative;
}
.toc-chapter:hover {
    border-color: rgba(169, 50, 38, 0.25);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px -10px rgba(10,10,10,0.12);
}
.toc-chapter::before {
    content: '';
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 3px;
    background: var(--vermillion);
    border-radius: 8px 0 0 8px;
    opacity: 0;
    transition: opacity .3s ease;
}
.toc-chapter:hover::before { opacity: 1; }

.toc-part-alt .toc-chapter {
    background: var(--ink-black);
    border-color: rgba(185, 146, 58, 0.15);
}
.toc-part-alt .toc-chapter:hover {
    border-color: rgba(185, 146, 58, 0.35);
}
.toc-part-alt .toc-chapter::before {
    background: var(--gold-soft);
}
.toc-part-alt .toc-chapter h4 { color: var(--paper); }
.toc-part-alt .toc-chapter p { color: rgba(250,247,240,0.7); }

.toc-ch-num {
    font-family: var(--font-serif-en);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--vermillion);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding-top: 3px;
}
.toc-part-alt .toc-ch-num { color: var(--gold-soft); }

.toc-ch-body h4 {
    font-family: var(--font-serif-en);
    font-size: clamp(1.05rem, 1.5vw, 1.2rem);
    font-weight: 600;
    color: var(--ink-black);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}
.toc-ch-body h4 em {
    font-family: var(--font-cn-body);
    font-style: normal;
    font-weight: 600;
    color: var(--vermillion);
}
.toc-part-alt .toc-ch-body h4 em { color: var(--gold-soft); }

.toc-ch-body p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--ink-mid);
}

/* ============================================
   EDITIONS / COVER DESIGNS
   ============================================ */
.editions {
    background: var(--paper);
    position: relative;
}
.editions::before {
    content: '\4E09';
    position: absolute;
    top: 5%;
    right: 4%;
    font-family: var(--font-cn);
    font-weight: 900;
    font-size: clamp(8rem, 22vw, 18rem);
    color: var(--vermillion);
    opacity: 0.04;
    pointer-events: none;
    user-select: none;
}
.editions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: stretch;
}
.edition-card {
    background: var(--paper);
    border: 1px solid var(--paper-shadow);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all .4s ease;
    position: relative;
}
.edition-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(to right, transparent, var(--vermillion), transparent);
    opacity: 0;
    transition: opacity .4s ease;
}
.edition-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px -15px rgba(10,10,10,0.18);
    border-color: rgba(169, 50, 38, 0.2);
}
.edition-card:hover::before { opacity: 1; }

.edition-card-feature {
    background: var(--ink-black);
    color: var(--paper);
    border-color: rgba(185, 146, 58, 0.25);
}
.edition-card-feature::before {
    background: linear-gradient(to right, transparent, var(--gold-soft), transparent);
}
.edition-card-feature .edition-info h3 { color: var(--paper); }
.edition-card-feature .edition-info p { color: rgba(250,247,240,0.75); }
.edition-card-feature .edition-badge {
    background: var(--gold-soft);
    color: var(--ink-black);
}
.edition-card-feature .edition-specs { border-top-color: rgba(250,247,240,0.15); }
.edition-card-feature .edition-specs span { color: rgba(250,247,240,0.5); }
.edition-card-feature .edition-specs strong { color: var(--paper); }

.edition-image {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: linear-gradient(180deg, #2a1f10 0%, #0a0a0a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}
.edition-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .6s ease;
}
.edition-card:hover .edition-image img {
    transform: scale(1.05);
}
.edition-image-light {
    background: var(--paper-warm);
}

.edition-info {
    padding: clamp(1.5rem, 2.5vw, 2rem);
    display: flex;
    flex-direction: column;
    flex: 1;
}
.edition-badge {
    display: inline-block;
    align-self: flex-start;
    padding: 0.35rem 0.8rem;
    background: var(--vermillion);
    color: var(--paper);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    border-radius: 999px;
    margin-bottom: 1rem;
}
.edition-info h3 {
    font-family: var(--font-serif-en);
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    font-weight: 600;
    color: var(--ink-black);
    margin-bottom: 0.8rem;
    line-height: 1.2;
}
.edition-info p {
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--ink-mid);
    margin-bottom: 1.4rem;
}
.edition-info p em { color: var(--vermillion); font-style: italic; }

.edition-specs {
    list-style: none;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid rgba(10,10,10,0.08);
}
.edition-specs li {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 0.6rem;
    padding: 0.5rem 0;
    font-size: 0.85rem;
}
.edition-specs span {
    color: var(--gray);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding-top: 2px;
}
.edition-specs strong {
    color: var(--ink-black);
    font-weight: 500;
}

/* ============================================
   FIVE PILLARS
   ============================================ */
.pillars { background: var(--paper-warm); position: relative; }
.pillars::before {
    content: '\4E94\5E38';
    position: absolute;
    top: 8%;
    right: 5%;
    font-family: var(--font-cn);
    font-weight: 900;
    font-size: clamp(6rem, 18vw, 14rem);
    color: var(--vermillion);
    opacity: 0.04;
    pointer-events: none;
    user-select: none;
}
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.2rem;
}
.pillar {
    text-align: center;
    padding: 2.5rem 1.2rem;
    border: 1px solid transparent;
    border-radius: 8px;
    background: rgba(255,255,255,0.5);
    transition: all .4s ease;
    position: relative;
}
.pillar:hover {
    transform: translateY(-8px);
    border-color: rgba(169, 50, 38, 0.2);
    background: rgba(255,255,255,0.85);
    box-shadow: 0 20px 40px -15px rgba(10,10,10,0.15);
}
.pillar-glyph {
    font-family: var(--font-cn);
    font-weight: 900;
    font-size: 3.8rem;
    line-height: 1;
    color: var(--vermillion);
    margin-bottom: 1.2rem;
    display: inline-block;
    transition: transform .4s ease;
}
.pillar:hover .pillar-glyph { transform: scale(1.15); }
.pillar h3 {
    font-family: var(--font-serif-en);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
    color: var(--ink-black);
}
.pillar h3::after {
    content: '';
    display: block;
    width: 24px;
    height: 1px;
    background: var(--vermillion);
    margin: 0.8rem auto 1rem;
}
.pillar p {
    font-size: 0.92rem;
    line-height: 1.65;
    color: var(--ink-mid);
}

/* ============================================
   CORE PRINCIPLES (NEW V2)
   ============================================ */
.principles {
    background: var(--ink-black);
    color: var(--paper);
    position: relative;
}
.principles::before {
    content: '\539F\5219';
    position: absolute;
    top: 6%;
    left: 3%;
    font-family: var(--font-cn);
    font-weight: 900;
    font-size: clamp(6rem, 18vw, 14rem);
    color: var(--gold-soft);
    opacity: 0.04;
    pointer-events: none;
    user-select: none;
}
.principles .section-title { color: var(--paper); }
.principles .section-subtitle { color: rgba(250,247,240,0.6); }

.principles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.principle {
    padding: clamp(2rem, 3.5vw, 2.8rem);
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 8px;
    transition: all .4s ease;
    position: relative;
    overflow: hidden;
}
.principle::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(to right, transparent, var(--gold-soft), transparent);
    opacity: 0;
    transition: opacity .4s ease;
}
.principle:hover {
    border-color: rgba(185, 146, 58, 0.25);
    transform: translateY(-6px);
    background: rgba(255,255,255,0.05);
}
.principle:hover::before { opacity: 1; }

.principle-center {
    background: rgba(169, 50, 38, 0.12);
    border-color: rgba(169, 50, 38, 0.25);
}
.principle-center::before {
    background: linear-gradient(to right, transparent, var(--vermillion), transparent);
}

.principle-num {
    font-family: var(--font-serif-en);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gold-soft);
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
}
.principle-center .principle-num { color: var(--vermillion); }

.principle-glyph {
    font-family: var(--font-cn);
    font-weight: 900;
    font-size: clamp(2.2rem, 4vw, 3rem);
    line-height: 1;
    color: var(--gold-soft);
    margin-bottom: 1.2rem;
    letter-spacing: 0.04em;
    transition: transform .4s ease;
}
.principle:hover .principle-glyph { transform: scale(1.06); }
.principle-center .principle-glyph { color: var(--vermillion); }

.principle h3 {
    font-family: var(--font-serif-en);
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    font-weight: 600;
    color: var(--paper);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.principle p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: rgba(250,247,240,0.7);
    margin-bottom: 1rem;
}
.principle p strong {
    color: var(--paper);
    font-weight: 500;
}
.principle-cn {
    font-family: var(--font-cn);
    font-size: 0.88rem;
    color: rgba(250,247,240,0.5);
    font-style: normal !important;
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 0.8rem;
    margin-top: 0.5rem;
    margin-bottom: 0;
}

/* ============================================
   COMPARE TABLE (NEW V2)
   ============================================ */
.compare {
    background: var(--paper);
    position: relative;
}
.compare-table-wrap {
    overflow-x: auto;
    margin-bottom: 3rem;
}
.compare-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 680px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 8px 30px -12px rgba(10,10,10,0.12);
}
.compare-table thead {
    background: var(--ink-black);
}
.compare-table th {
    padding: 1.4rem 1.5rem;
    text-align: left;
    font-family: var(--font-serif-en);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--paper);
    vertical-align: middle;
}
.compare-col-label { width: 22%; }
.compare-col-old { width: 39%; border-left: 1px solid rgba(255,255,255,0.1); }
.compare-col-new {
    width: 39%;
    border-left: 1px solid rgba(255,255,255,0.1);
    color: var(--gold-soft);
}
.compare-col-cn {
    display: block;
    font-family: var(--font-cn);
    font-size: 0.85rem;
    font-weight: 400;
    opacity: 0.7;
    margin-top: 0.2rem;
}

.compare-table tbody tr {
    border-bottom: 1px solid var(--paper-shadow);
    transition: background .2s ease;
}
.compare-table tbody tr:nth-child(even) {
    background: var(--paper-warm);
}
.compare-table tbody tr:hover {
    background: rgba(169, 50, 38, 0.04);
}
.compare-table td {
    padding: 1.2rem 1.5rem;
    font-size: 0.95rem;
    line-height: 1.5;
    vertical-align: middle;
}
.compare-dim {
    font-family: var(--font-serif-en);
    font-weight: 600;
    color: var(--ink-black);
    font-size: 1rem;
}
.compare-dim-cn {
    display: block;
    font-family: var(--font-cn);
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--gray);
    margin-top: 0.2rem;
}
.compare-col-old { color: var(--ink-mid); }
.compare-col-new { color: var(--vermillion); font-weight: 500; }
.compare-table td.compare-col-new { color: var(--vermillion); }
.compare-table td.compare-col-old { color: var(--ink-mid); }

.compare-note {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 0 1rem;
}
.compare-note p {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    line-height: 1.7;
    color: var(--ink-mid);
}
.compare-note p em {
    color: var(--vermillion);
    font-weight: 500;
}

/* ============================================
   LINEAGE / ROOTS
   ============================================ */
.lineage { background: var(--paper-warm); position: relative; }
.lineage::before {
    content: '\5112\9053';
    position: absolute;
    top: 6%;
    left: 3%;
    font-family: var(--font-cn);
    font-weight: 900;
    font-size: clamp(6rem, 18vw, 14rem);
    color: var(--vermillion);
    opacity: 0.04;
    pointer-events: none;
    user-select: none;
}
.lineage-intro {
    max-width: 780px;
    margin: 0 auto clamp(3rem, 5vw, 4rem);
    text-align: center;
}
.lineage-intro p {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: clamp(1.1rem, 1.6vw, 1.25rem);
    line-height: 1.6;
    color: var(--ink-mid);
}
.lineage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.lineage-card {
    padding: clamp(2rem, 3.5vw, 2.8rem) clamp(1.5rem, 2.5vw, 2rem);
    background: var(--paper);
    border: 1px solid var(--paper-shadow);
    border-radius: 8px;
    text-align: center;
    transition: all .4s ease;
    position: relative;
    overflow: hidden;
}
.lineage-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(to right, transparent, var(--vermillion), transparent);
    opacity: 0;
    transition: opacity .4s ease;
}
.lineage-card:hover {
    transform: translateY(-6px);
    border-color: rgba(169, 50, 38, 0.25);
    box-shadow: 0 20px 40px -15px rgba(10,10,10,0.12);
}
.lineage-card:hover::after { opacity: 1; }
.lineage-card-center {
    background: var(--ink-black);
    color: var(--paper);
    border-color: rgba(185, 146, 58, 0.2);
}
.lineage-card-center::after {
    background: linear-gradient(to right, transparent, var(--gold-soft), transparent);
}
.lineage-glyph {
    font-family: var(--font-cn);
    font-weight: 900;
    font-size: clamp(2.4rem, 4.5vw, 3.4rem);
    line-height: 1;
    color: var(--vermillion);
    margin-bottom: 1.4rem;
    letter-spacing: 0.04em;
    transition: transform .4s ease;
}
.lineage-card-center .lineage-glyph { color: var(--gold-soft); }
.lineage-card:hover .lineage-glyph { transform: scale(1.08); }
.lineage-label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--vermillion);
    margin-bottom: 0.8rem;
}
.lineage-card-center .lineage-label { color: var(--gold-soft); }
.lineage-card h3 {
    font-family: var(--font-serif-en);
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    font-weight: 600;
    color: var(--ink-black);
    margin-bottom: 1rem;
    line-height: 1.2;
}
.lineage-card-center h3 { color: var(--paper); }
.lineage-card p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--ink-mid);
}
.lineage-card-center p { color: rgba(250,247,240,0.75); }
.lineage-card p strong {
    font-family: var(--font-cn);
    font-weight: 700;
    color: var(--vermillion);
    letter-spacing: 0.04em;
}
.lineage-card-center p strong { color: var(--gold-soft); }

/* Key Quotes section */
.quotes-section {
    margin-top: clamp(3rem, 5vw, 5rem);
    padding-top: clamp(3rem, 5vw, 5rem);
    border-top: 1px solid var(--paper-shadow);
    text-align: center;
}
.quotes-title {
    font-family: var(--font-cn);
    font-weight: 700;
    font-size: clamp(1.3rem, 2vw, 1.6rem);
    color: var(--vermillion);
    margin-bottom: 1.3rem;
    letter-spacing: 0.06em;
}
.quotes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    text-align: left;
}
.key-quote {
    padding: 1.1rem 1.1rem;
    background: var(--paper);
    border: 1px solid var(--paper-shadow);
    border-radius: 8px;
    position: relative;
    transition: all .3s ease;
}
.key-quote:hover {
    border-color: rgba(169, 50, 38, 0.25);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px -10px rgba(10,10,10,0.12);
}
.quote-cn {
    font-family: var(--font-cn);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--ink-black);
    margin-bottom: 0.3rem;
    letter-spacing: 0.04em;
    position: relative;
    z-index: 1;
}
.quote-en {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: 0.98rem;
    color: var(--ink-mid);
    line-height: 1.5;
}

/* ============================================
   AUTHOR
   ============================================ */
.author { background: var(--ink-black); color: var(--paper); }
.author .section-title { color: var(--paper); }
.author-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: clamp(3rem, 6vw, 5rem);
    align-items: center;
}
/* column wrapper so the seal chop sits under the portrait */
.author-portrait-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.15rem;
}
.author-portrait {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.15rem;
    width: 100%;
    max-width: 380px;
    margin: 0 auto;
}
.portrait-frame-hands .portrait-photo { object-position: center 28%; }
.portrait-frame {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 50%;
    background:
        radial-gradient(circle at 30% 30%, rgba(185,146,58,0.25), transparent 60%),
        linear-gradient(135deg, #2a2a2a, #0a0a0a);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(185,146,58,0.4);
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 50px -10px rgba(0,0,0,0.6),
                inset 0 0 0 1px rgba(185,146,58,0.1);
}
.portrait-frame::before {
    content: '';
    position: absolute;
    inset: 8px;
    border-radius: 50%;
    border: 1px solid rgba(185,146,58,0.25);
    z-index: 2;
    pointer-events: none;
}
/* V3: actual photo replaces the monogram */
.portrait-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 20%;
    border-radius: 50%;
    display: block;
    transition: transform .6s ease;
    filter: contrast(1.05) saturate(1.05);
}
.author-portrait:hover .portrait-photo {
    transform: scale(1.03);
}
.portrait-stamp {
    position: absolute;
    bottom: -10px;
    right: -10px;
    width: 80px; height: 80px;
    background: var(--vermillion);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-cn);
    font-weight: 900;
    font-size: 2.4rem;
    color: var(--paper);
    transform: rotate(-8deg);
    box-shadow: 0 10px 25px rgba(169, 50, 38, 0.4);
}
/* the real seal chop under the author photo */
.portrait-seal {
    display: block;
    width: 110px;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(185, 146, 58, 0.28);
    transform: rotate(1.5deg);
    transition: transform .35s ease;
}
.portrait-seal:hover { transform: rotate(0deg) scale(1.03); }

.author-info .section-num { color: var(--gold-soft); }
.author-name {
    font-family: var(--font-serif-en);
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 500;
    margin: 1rem 0 0.4rem;
    color: var(--paper);
}
.author-name-cn {
    font-family: var(--font-cn);
    font-weight: 600;
    color: var(--gold-soft);
    font-size: 0.85em;
    margin-left: 0.4rem;
}
.author-logo {
    width: 80px;
    height: auto;
    border-radius: 10px;
    margin-bottom: 0.5rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    display: block;
}
.author-link {
    color: var(--paper);
    text-decoration: none;
    border-bottom: 2px solid var(--gold-soft);
    transition: color 0.3s, border-color 0.3s;
}
.author-link:hover {
    color: var(--gold-soft);
    border-color: var(--vermillion);
}
.author-lineage {
    font-family: var(--font-cn);
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--gold-soft);
    margin: 0.3rem 0 0.8rem;
    letter-spacing: 0.15em;
    opacity: 0.9;
}
.author-role {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: 1.05rem;
    color: var(--gold-soft);
    margin-bottom: 1.6rem;
}
.author-info p {
    font-size: 1.02rem;
    line-height: 1.75;
    color: rgba(250,247,240,0.75);
    margin-bottom: 1rem;
    max-width: 640px;
}
.author-info p strong { color: var(--paper); font-weight: 500; }
.author-info p em { color: var(--gold-soft); font-style: italic; }

/* Author credentials grid (NEW V2) */
.author-credentials {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(250,247,240,0.1);
}
.credential {
    padding: 1rem 1.2rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 6px;
    transition: all .3s ease;
}
.credential:hover {
    border-color: rgba(185, 146, 58, 0.2);
    background: rgba(255,255,255,0.05);
}
.credential-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold-soft);
    margin-bottom: 0.4rem;
}
.credential strong {
    font-family: var(--font-serif-en);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--paper);
}

/* Author "Also" tags (NEW V3) */
.author-extra {
    margin-top: 1.8rem;
}
.extra-label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: rgba(250,247,240,0.4);
    margin-bottom: 0.6rem;
}
.extra-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.tag {
    padding: 0.4rem 0.85rem;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 999px;
    font-size: 0.78rem;
    color: rgba(250,247,240,0.7);
    transition: all .25s ease;
}
.tag:hover {
    border-color: rgba(185, 146, 58, 0.3);
    color: var(--gold-soft);
    background: rgba(185, 146, 58, 0.06);
}

.author-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}
.author .btn-outline {
    color: var(--paper);
    border-color: rgba(250,247,240,0.3);
}
.author .btn-outline:hover {
    background: var(--paper);
    color: var(--ink-black);
    border-color: var(--paper);
}

.author-social {
    margin-top: 2.2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(250,247,240,0.12);
}
.social-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(250,247,240,0.5);
    margin-bottom: 1rem;
}
.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}
.social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1rem;
    border: 1px solid rgba(250,247,240,0.18);
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 500;
    color: rgba(250,247,240,0.75);
    transition: all .25s ease;
}
.social-link svg {
    flex-shrink: 0;
    opacity: 0.8;
    transition: opacity .25s ease;
}
.social-link:hover {
    border-color: var(--gold-soft);
    color: var(--gold-soft);
    transform: translateY(-2px);
}
.social-link:hover svg { opacity: 1; }

/* ============================================
   VIP SIGNATURE EDITION - DIRECT PAYMENT FRAME
   ============================================ */
.vip-frame {
    position: relative;
    z-index: 1;
    max-width: 920px;
    margin: clamp(2.5rem, 5vw, 4rem) auto 0;
    padding: clamp(1.5rem, 3vw, 2.6rem);
    background: var(--paper);
    border: 1px solid rgba(169, 50, 38, 0.28);
    box-shadow: 0 0 0 6px rgba(169, 50, 38, 0.045), 0 18px 40px rgba(10, 10, 10, 0.06);
}
.vip-frame::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--vermillion), var(--gold-soft));
}
.vip-frame-kicker {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.7rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--vermillion);
    margin-bottom: 0.55rem;
}
.vip-frame-title {
    font-family: var(--font-serif-en);
    font-size: clamp(1.2rem, 2.2vw, 1.55rem);
    font-weight: 600;
    line-height: 1.35;
    color: var(--ink-black);
    margin: 0 0 0.9rem;
    text-align: left;
}
.vip-frame-lead {
    font-family: var(--font-body);
    font-size: 0.94rem;
    line-height: 1.8;
    color: var(--ink-mid);
    margin: 0 0 1.6rem;
    max-width: 70ch;
}
.vip-nb { white-space: nowrap; }
.vip-price {
    display: inline-block;
    margin-left: 0.25rem;
    padding: 0.1rem 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    color: var(--vermillion);
    background: rgba(169, 50, 38, 0.07);
    border: 1px solid rgba(169, 50, 38, 0.22);
    border-radius: var(--radius);
    white-space: nowrap;
}
.vip-wallets {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.75rem;
}
.vip-wallet {
    padding: 0.85rem 1rem;
    background: var(--paper-warm);
    border: 1px solid rgba(10, 10, 10, 0.07);
}
.vip-wallet-label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.5rem;
}
.vip-wallet-num {
    flex: 0 0 auto;
    width: 1.55rem;
    height: 1.55rem;
    border-radius: 50%;
    background: var(--ink-black);
    color: var(--paper);
    font-family: var(--font-sans);
    font-size: 0.7rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.vip-wallet-name {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    line-height: 1.45;
    color: var(--ink-soft);
}
.vip-wallet-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.vip-wallet-addr {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.8rem;
    line-height: 1.6;
    color: var(--ink-black);
    word-break: break-all;
}
.vip-copy {
    flex: 0 0 auto;
    font-family: var(--font-sans);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.42rem 0.78rem;
    border: 1px solid rgba(169, 50, 38, 0.35);
    border-radius: var(--radius);
    background: transparent;
    color: var(--vermillion);
    cursor: pointer;
    transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.vip-copy:hover {
    background: var(--vermillion);
    border-color: var(--vermillion);
    color: var(--paper);
}
.vip-copy.is-copied {
    background: var(--gold);
    border-color: var(--gold);
    color: var(--paper);
}
.vip-frame-note {
    margin: 1.3rem 0 0;
    font-size: 0.78rem;
    line-height: 1.7;
    color: var(--gray);
}
@media (max-width: 640px) {
    .vip-wallet-row { flex-direction: column; align-items: flex-start; gap: 0.6rem; }
    .vip-wallet-addr { font-size: 0.73rem; }
}

/* ============================================
   PRE-ORDER
   ============================================ */
.preorder {
    background: var(--paper-warm);
    position: relative;
    overflow: hidden;
}
.preorder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 0% 50%, rgba(169,50,38,0.04), transparent 50%);
}
.preorder-container {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: clamp(2.5rem, 5vw, 5rem);
    align-items: center;
    position: relative;
    z-index: 1;
}
.preorder-art {
    display: flex;
    align-items: center;
    justify-content: center;
}
.preorder-art img {
    width: min(100%, 360px);
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(10,10,10,0.18));
    object-fit: contain;
}
.preorder-content .section-num { display: inline-block; }
.preorder-content .section-title { text-align: left; }
.preorder-lead {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: clamp(1.15rem, 1.7vw, 1.3rem);
    color: var(--ink-mid);
    margin: 1.5rem 0 2rem;
    line-height: 1.5;
    max-width: 540px;
}
.preorder-form {
    display: flex;
    gap: 0.6rem;
    max-width: 480px;
    margin-bottom: 1rem;
}
.preorder-form input {
    flex: 1;
    padding: 0.95rem 1.2rem;
    font-size: 0.95rem;
    border: 1.5px solid rgba(10,10,10,0.15);
    border-radius: 999px;
    background: var(--paper);
    color: var(--ink-black);
    transition: border-color .2s ease;
    font-family: inherit;
}
.preorder-form input:focus {
    outline: none;
    border-color: var(--vermillion);
}
.preorder-form input::placeholder { color: var(--gray-light); }
.preorder-form .btn { padding: 0.95rem 1.6rem; }
.preorder-note {
    font-size: 0.85rem;
    color: var(--gray);
    margin-bottom: 2.5rem;
    letter-spacing: 0.02em;
}
.preorder-formats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    max-width: 540px;
}
.format {
    padding: 1.2rem 0.8rem;
    background: rgba(255,255,255,0.6);
    border: 1px solid rgba(10,10,10,0.06);
    border-radius: 8px;
    text-align: center;
    transition: all .3s ease;
}
.format:hover {
    border-color: var(--vermillion);
    transform: translateY(-3px);
}
.format-icon {
    font-size: 1.8rem;
    display: block;
    margin-bottom: 0.4rem;
}
.format strong {
    display: block;
    font-family: var(--font-serif-en);
    font-weight: 600;
    color: var(--ink-black);
    font-size: 1rem;
    margin-bottom: 0.2rem;
}
.format small {
    font-size: 0.78rem;
    color: var(--gray);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--ink-black);
    color: var(--paper);
    padding: 4rem 0 2rem;
}
.footer-inner {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1fr;
    gap: 2rem;
    align-items: start;
}
.footer-brand .brand-en { color: var(--paper); font-size: 2rem; }
.footer-brand .brand-cn { font-size: 1.4rem; }
.footer-brand p {
    font-family: var(--font-serif-en);
    font-style: italic;
    color: rgba(250,247,240,0.6);
    margin-top: 0.4rem;
    font-size: 0.95rem;
}
.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem 2rem;
    justify-content: center;
}
.footer-links a {
    font-size: 0.9rem;
    color: rgba(250,247,240,0.7);
    transition: color .2s ease;
}
.footer-links a:hover { color: var(--gold-soft); }
.footer-meta {
    text-align: right;
    font-size: 0.82rem;
    color: rgba(250,247,240,0.5);
}
.footer-copyright {
    max-width: 560px;
    margin: 0.55rem 0 0 auto;
    font-size: 0.72rem;
    line-height: 1.75;
    letter-spacing: 0.02em;
    color: rgba(250,247,240,0.55);
}
.footer-copyright + .footer-copyright { margin-top: 0.5rem; }
.footer-tagline {
    font-family: var(--font-cn);
    margin-top: 0.4rem;
    color: var(--vermillion) !important;
    opacity: 0.7;
    letter-spacing: 0.08em;
}

.footer-social {
    display: flex;
    gap: 0.6rem;
    margin-bottom: 1.2rem;
    justify-content: flex-end;
}
.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(250,247,240,0.18);
    color: rgba(250,247,240,0.6);
    transition: all .25s ease;
}
.footer-social a:hover {
    border-color: var(--gold-soft);
    color: var(--gold-soft);
    transform: translateY(-3px);
    background: rgba(185,146,58,0.08);
}

/* ============================================
   CROSS-REFERENCE LINK GRID (NEW V5)
   ============================================ */
.footer-xref {
    border-top: 1px solid rgba(250,247,240,0.08);
    padding: 2.5rem 0 2rem;
    background: #050505;
}
.xref-title {
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--gold-soft);
    margin-bottom: 1.8rem;
    opacity: 0.7;
}
.xref-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}
.xref-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    padding: 1.2rem 0.8rem;
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 8px;
    background: rgba(255,255,255,0.02);
    transition: all .3s ease;
    text-align: center;
}
.xref-link:hover {
    border-color: rgba(185, 146, 58, 0.25);
    background: rgba(255,255,255,0.04);
    transform: translateY(-4px);
    box-shadow: 0 12px 25px -8px rgba(0,0,0,0.4);
}
.xref-icon {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gold-soft);
    line-height: 1;
    font-family: var(--font-serif-en);
}
.xref-url {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--paper);
    word-break: break-all;
}
.xref-desc {
    font-size: 0.7rem;
    color: rgba(250,247,240,0.45);
    letter-spacing: 0.02em;
}
.xref-built {
    text-align: center;
    font-size: 0.72rem;
    color: rgba(250,247,240,0.3);
    letter-spacing: 0.05em;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.04);
}

@media (max-width: 860px) {
    .xref-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 520px) {
    .xref-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   PREFACE
   ============================================ */
.preface {
    background: var(--paper);
    position: relative;
}
.preface-container {
    max-width: 880px;
}
.preface-head {
    margin-bottom: clamp(1.8rem, 3.5vw, 2.8rem);
}
.preface-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    max-width: 420px;
    margin: 0 auto clamp(2rem, 4vw, 3rem);
}
.preface-divider::before,
.preface-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-soft), transparent);
}
.preface-divider span {
    font-family: var(--font-cn);
    font-size: 1.6rem;
    line-height: 1;
    color: var(--vermillion);
    border: 1.5px solid var(--vermillion);
    border-radius: 6px;
    padding: 0.35rem 0.5rem;
    transform: rotate(-3deg);
    box-shadow: 0 3px 10px rgba(169, 50, 38, 0.18);
}
.preface-body {
    max-width: 780px;
    margin: 0 auto;
}
.preface-body p {
    font-size: clamp(1rem, 1.25vw, 1.1rem);
    line-height: 1.95;
    color: var(--ink-mid);
    margin-bottom: 1.4rem;
    text-align: justify;
    text-justify: inter-word;
}
.preface-body p:last-child {
    margin-bottom: 0;
}
.preface-body strong {
    color: var(--ink-black);
    font-weight: 600;
}
.preface-body em {
    font-family: var(--font-serif-en);
    font-style: italic;
}
.preface-drop::first-letter {
    float: left;
    font-family: var(--font-serif-en);
    font-size: 3.6rem;
    line-height: 0.82;
    padding: 0.05em 0.14em 0 0;
    color: var(--vermillion);
}
.preface-signature {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.15rem;
    max-width: 780px;
    margin: clamp(2.4rem, 5vw, 3.4rem) auto 0;
    padding-top: 1.8rem;
    border-top: 1px solid rgba(184, 146, 58, 0.32);
}
.preface-sig-cn {
    font-family: var(--font-cn);
    font-size: 1.8rem;
    line-height: 1;
    color: var(--vermillion);
}
.preface-sig-name {
    font-family: var(--font-serif-en);
    font-size: 1.15rem;
    letter-spacing: 0.05em;
    color: var(--ink-black);
}
.preface-sig-place {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: 0.95rem;
    color: var(--gray);
}

/* Preface signature with the author's seal chop */
.preface-signature-seal {
    flex-direction: row;
    align-items: flex-end;
    justify-content: flex-end;
    gap: 1.4rem;
}
.preface-sig-text {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.15rem;
    text-align: right;
}
.preface-sig-name {
    color: var(--ink-black);
    text-decoration: none;
    border-bottom: 1px solid rgba(169, 50, 38, 0.3);
    transition: color .18s ease, border-color .18s ease;
}
.preface-sig-name:hover {
    color: var(--vermillion);
    border-bottom-color: var(--vermillion);
}
.preface-sig-seal {
    display: block;
    width: 108px;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 2px 10px rgba(10, 10, 10, 0.14);
    transform: rotate(1.2deg);
}
@media (max-width: 640px) {
    .preface-signature-seal { gap: 1rem; }
    .preface-sig-seal { width: 84px; }
}

@media (max-width: 640px) {
    .hero {
        padding: 5rem 1rem 3rem;
    }
    /* smaller display sizes so every hero line fits inside
       a 320-430px phone viewport with no sideways clipping */
    .title-en {
        font-size: clamp(2.7rem, 15.5vw, 5rem);
        letter-spacing: -0.03em;
    }
    .title-cn {
        font-size: clamp(2.1rem, 9.5vw, 3.4rem);
    }
    .hero-subtitle-en {
        font-size: clamp(0.98rem, 4.5vw, 1.3rem);
        line-height: 1.3;
        padding-inline: 0.25rem;
    }
    .hero-tagline {
        font-size: clamp(0.9rem, 3.95vw, 1.05rem);
        line-height: 1.5;
        padding-inline: 0.25rem;
    }
    .hero-subtitle-cn {
        font-size: clamp(0.85rem, 3.7vw, 1rem);
        line-height: 1.55;
        letter-spacing: 0.02em;
    }
    .hero-by {
        font-size: 0.85rem;
        letter-spacing: 0.03em;
    }
}

/* ============================================
   BODY TEXT FONT — Joan (readability pass)
   Running / smaller body copy uses the clean,
   highly-readable Joan serif. Display items
   (brand wordmark, hero title, section titles,
   card headings, decorative quote marks, drop
   cap) intentionally remain in Lugrasimo.
   ============================================ */
.brand-by,
.title-by,
.hero-tagline,
.section-num,
.section-subtitle,
.quote,
.book-lead,
.book-quote-en,
.toc-part-num,
.toc-part-desc,
.toc-ch-num,
.toc-ch-desc,
.principle-num,
.compare-dim,
.compare-note p,
.compare-table td,
.lineage-intro p,
.quote-en,
.author-role,
.credential strong,
.preorder-lead,
.format strong,
.footer-brand p,
.preface-body em,
.preface-sig-name,
.preface-sig-place {
    font-family: var(--font-body);
}

/* ============================================
   SCROLL REVEAL
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .8s ease, transform .8s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .nav-links { gap: 0.25rem; }
    .nav-links a { font-size: 0.86rem; padding: 0.4rem 0.6rem; }
    .nav-dropbtn { font-size: 0.86rem; padding: 0.4rem 0.6rem; }
    .nav-links .nav-dropitem, .nav-links .nav-dropfull { font-size: 0.76rem; padding: 0.3rem 0.45rem; }
    .nav-links .nav-dropgroup { font-size: 0.74rem; padding: 0.18rem 0.45rem; }
    .nav-dropmenu { width: min(94vw, 620px); }
    .pillars-grid { grid-template-columns: repeat(3, 1fr); }
    .toc-chapters { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
    /* No hamburger and NO wrapping: everything lives on one single row —
       RuDao 儒道 · TOC 目录 · Author · Reviews 读者评语 */
    .nav-inner {
        flex-direction: row;
        flex-wrap: nowrap;
        justify-content: center;
        align-items: center;
        gap: 0.05rem;
        padding: 0.5rem 0.45rem 0.45rem;
    }
    .nav-brand {
        justify-content: center;
        gap: 0.3rem;
        flex-shrink: 0;
    }
    .nav-brand .brand-en { font-size: 1rem; }
    .nav-brand .brand-cn { font-size: 0.82rem; }
    .nav-links {
        position: static;
        display: flex;
        flex-direction: row;
        flex-wrap: nowrap;
        justify-content: center;
        align-items: center;
        width: auto;
        min-width: 0;
        background: transparent;
        padding: 0;
        border: 0;
        gap: 0;
        transform: none;
        opacity: 1;
        max-height: none;
        overflow: visible;
    }
    .nav-links a {
        display: inline-block;
        padding: 0.3rem 0.3rem;
        border-radius: 6px;
        font-size: 0.78rem;
        font-weight: 600;
        border-bottom: 0;
        white-space: nowrap;
    }
    .nav-links a::after { display: none; }
    .nav-links a:hover,
    .nav-links a:focus-visible { background-color: rgba(169, 50, 38, 0.08); }
    /* TOC dropdown becomes a full-width sheet on small screens */
    .nav-dropbtn { font-size: 0.78rem; padding: 0.3rem 0.3rem; }
    .nav-dropmenu {
        position: fixed;
        top: 4.7rem;
        left: 0.5rem;
        right: 0.5rem;
        width: auto;
        max-height: 78vh;
        grid-template-columns: 1fr;
        padding: 0.6rem 0.7rem;
    }
    .nav-links .nav-dropitem,
    .nav-links .nav-dropfull { font-size: 0.8rem; padding: 0.3rem 0.4rem; }
    .nav-links .nav-dropgroup { font-size: 0.78rem; padding: 0.22rem 0.4rem; margin: 0.4rem 0 0.1rem; }
    .nav-dropnum { min-width: 2.1rem; }
    /* keep anchor jumps clear of the single-row bar */
    section[id],
    .endorse-card,
    .coeditor { scroll-margin-top: 78px; }
    .concept-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .concept-divider {
        width: 100%;
        height: 50px;
        flex-direction: row;
        gap: 0.7rem;
    }
    .divider-en { font-size: 0.62rem; padding: 0.1rem 0.45rem; }
    .concept-divider::before {
        left: 0; right: 0;
        top: 50%;
        height: 1px;
        background: linear-gradient(to right, transparent, var(--vermillion), transparent);
    }
    .book-container {
        grid-template-columns: 1fr;
    }
    .book-art { margin-bottom: 2rem; }
    .pillars-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .editions-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
    }
    .lineage-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
    }
    .principles-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
    }
    .quotes-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
    }
    .author-container {
        grid-template-columns: 1fr;
    }
    .author-portrait { max-width: 260px; }
    .portrait-seal { width: 92px; }
    .author-credentials {
        grid-template-columns: 1fr;
    }
    .preorder-container {
        grid-template-columns: 1fr;
    }
    .preorder-art { display: none; }
    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-meta { text-align: center; }
    .footer-social { justify-content: center; }
    .footer-brand, .footer-links { justify-content: center; }
    .footer-brand { display: flex; flex-direction: column; align-items: center; }
    .footer-links { gap: 0.8rem 1.2rem; }
}

@media (max-width: 520px) {
    .pillars-grid { grid-template-columns: 1fr; }
    .book-meta li {
        grid-template-columns: 1fr;
        gap: 0.2rem;
    }
    .book-details .book-meta li {
        grid-template-columns: 1fr;
        gap: 0.15rem;
    }
    .preorder-formats { grid-template-columns: 1fr; }
    .preorder-content { min-width: 0; }
    .preorder-cta .btn {
        min-width: 0;
        white-space: normal;
    }
    .preorder-form {
        flex-direction: column;
    }
    .book-cover-real {
        transform: rotateY(-8deg);
        width: min(300px, 80vw);
    }
    .toc-chapter {
        grid-template-columns: 1fr;
        gap: 0.4rem;
    }
}

/* ============================================
   CONTACT THE AUTHOR (XI)
   ============================================ */
.contact {
    background: var(--paper-warm);
}
.contact-grid {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 3.5rem;
    margin-top: 3rem;
    align-items: start;
}
.contact-aside-title {
    font-family: var(--font-serif-en);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 1rem;
    color: var(--ink-black);
}
.contact-aside-text {
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--gray);
    margin-bottom: 2rem;
    max-width: 42ch;
}
.contact-list {
    list-style: none;
    display: grid;
    gap: 1.25rem;
}
.contact-list li {
    display: flex;
    gap: 0.9rem;
    align-items: flex-start;
}
.contact-ico {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(169, 50, 38, 0.25);
    border-radius: 50%;
    background: var(--paper);
    font-size: 0.95rem;
    line-height: 1;
}
.contact-list strong {
    display: block;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--gray);
    font-weight: 500;
    margin-bottom: 0.15rem;
}
.contact-list a {
    font-size: 0.98rem;
    color: var(--ink-black);
    text-decoration: none;
    border-bottom: 1px solid rgba(169, 50, 38, 0.35);
    transition: color .2s ease, border-color .2s ease;
}
.contact-list a:hover {
    color: var(--vermillion);
    border-color: var(--vermillion);
}

.contact-form {
    background: var(--paper);
    border: 1px solid rgba(10, 10, 10, 0.08);
    border-radius: var(--radius);
    padding: 2.25rem;
    box-shadow: 0 18px 50px -30px rgba(10, 10, 10, 0.35);
}
.contact-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.1rem;
}
.contact-field {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-bottom: 1.2rem;
}
.contact-field label {
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gray);
    font-weight: 500;
}
.contact-field .req { color: var(--vermillion); }
.contact-field input,
.contact-field textarea {
    width: 100%;
    padding: 0.9rem 1.05rem;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--ink-black);
    background: var(--paper);
    border: 1.5px solid rgba(10, 10, 10, 0.15);
    border-radius: var(--radius);
    transition: border-color .2s ease, box-shadow .2s ease;
    resize: vertical;
}
.contact-field input:focus,
.contact-field textarea:focus {
    outline: none;
    border-color: var(--vermillion);
    box-shadow: 0 0 0 3px rgba(169, 50, 38, 0.08);
}
.contact-field input::placeholder,
.contact-field textarea::placeholder {
    color: var(--gray-light);
}
.contact-field input.invalid,
.contact-field textarea.invalid {
    border-color: var(--vermillion);
    background: rgba(169, 50, 38, 0.03);
}
.contact-botcheck {
    display: none !important;
}
.contact-actions {
    display: flex;
    align-items: center;
    gap: 1.1rem;
    flex-wrap: wrap;
    margin-top: 0.4rem;
}
.contact-actions .btn {
    padding: 1rem 1.9rem;
}
.contact-status {
    font-size: 0.88rem;
    line-height: 1.5;
    max-width: 34ch;
    color: var(--gray);
}
.contact-status.ok { color: #2f6b4f; }
.contact-status.err { color: var(--vermillion); }
.contact-privacy {
    font-size: 0.78rem;
    line-height: 1.6;
    color: var(--gray);
    margin-top: 1.2rem;
    padding-top: 1.1rem;
    border-top: 1px solid rgba(10, 10, 10, 0.07);
}
.contact-fallback {
    margin-top: 0.6rem;
    font-size: 0.85rem;
}
.contact-fallback a {
    color: var(--vermillion);
    text-decoration: none;
    border-bottom: 1px solid rgba(169, 50, 38, 0.35);
}

@media (max-width: 900px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    .contact-row {
        grid-template-columns: 1fr;
    }
    .contact-form {
        padding: 1.6rem;
    }
    .contact-actions .btn {
        width: 100%;
    }
}

/* ============================================
   PRINT
   ============================================ */
@media print {
    .nav, .hero-scroll, .btn { display: none; }
    body { background: white; color: black; }
}
/* ========== ENDORSEMENTS ========== */
.endorse-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:22px;margin-top:44px}
.endorse-card{background:var(--paper-warm, #faf6ee);border:1px solid rgba(0,0,0,.08);border-radius:var(--radius, 12px);padding:24px 26px 20px;display:flex;flex-direction:column;gap:12px;transition:transform .2s,box-shadow .2s}
.endorse-card:hover{transform:translateY(-3px);box-shadow:var(--paper-shadow, 0 8px 28px rgba(0,0,0,.08))}
.endorse-head{border-bottom:1px solid rgba(0,0,0,.08);padding-bottom:12px}
.endorse-name{font-family:var(--font-serif-en),serif;font-size:17px;color:var(--ink-black);margin:0 0 4px}
.endorse-role{font-size:12px;color:var(--gray);margin:0;line-height:1.5}
.endorse-body{flex:1}
.endorse-p{font-size:13.5px;line-height:1.75;color:var(--ink-mid);margin:0 0 10px}
.endorse-p-list{margin:0 0 10px;padding-left:18px;font-size:13.5px;line-height:1.75;color:var(--ink-mid);break-inside:avoid}
.endorse-p-list li{margin-bottom:4px}
.endorse-p.zh{font-family:var(--font-cn-body),'Noto Sans SC',sans-serif;color:var(--ink-soft)}
.endorse-p:last-child{margin-bottom:0}
.endorse-sig{font-size:12px;font-style:italic;color:var(--vermillion);margin:4px 0 0;line-height:1.6}
@media (max-width:760px){.endorse-grid{grid-template-columns:1fr}.endorse-p{font-size:13px}}

/* ===== Gallery · 书影 ===== */
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px;margin-top:44px}
.gallery-item{margin:0;background:var(--paper-warm,#faf6ee);border:1px solid rgba(0,0,0,.08);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .25s ease}
.gallery-item:hover{transform:translateY(-4px);box-shadow:0 14px 38px var(--paper-shadow,#e8e0cf)}
.gallery-item img{width:100%;height:auto;display:block;aspect-ratio:4/5;object-fit:cover}
.gallery-item-wide{grid-column:span 2}
.gallery-item-wide img{aspect-ratio:16/9}
@media (max-width:760px){.gallery-item-wide{grid-column:span 1}.gallery-item-wide img{aspect-ratio:4/5}}
.gallery-item figcaption{display:flex;flex-direction:column;gap:3px;padding:12px 14px 14px;border-top:1px solid rgba(0,0,0,.06)}
.gallery-cap-en{font-size:13px;letter-spacing:.04em;color:var(--ink-soft,#1a1a1a)}
.gallery-cap-zh{font-size:12.5px;color:var(--vermillion,#a93226);font-family:var(--font-cn-body),"Noto Serif SC",serif}
/* Endorsement feature letter (full-width) */
.endorse-card-letter{grid-column:1/-1}
.endorse-card-letter .endorse-body{columns:1}
@media (min-width:1100px){.endorse-card-letter .endorse-body{column-count:2;column-gap:34px}.endorse-card-letter .endorse-p{break-inside:avoid}}
.endorse-card-letter .endorse-p{font-size:14px}

/* Endorsement catalog / table of endorsers */
.endorse-toc{margin-top:36px;background:var(--paper-warm,#faf6ee);border:1px solid rgba(0,0,0,.08);border-radius:12px;padding:22px 26px 24px}
.endorse-toc-title{font-family:var(--font-serif-en),serif;font-size:16px;color:var(--ink-black);margin:0 0 16px;display:flex;flex-wrap:wrap;align-items:baseline;gap:10px}
.endorse-toc-hint{font-family:var(--font-body);font-size:11.5px;font-weight:400;color:var(--gray);letter-spacing:0}
.endorse-toc-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:8px 20px;counter-reset:toc}
.endorse-toc-list li{margin:0}
.endorse-toc-list a{display:flex;align-items:baseline;gap:9px;padding:7px 10px;border-radius:6px;text-decoration:none;border-left:2px solid transparent;transition:background .18s,border-color .18s}
.endorse-toc-list a:hover{background:rgba(169,50,38,.06);border-left-color:var(--vermillion)}
.toc-num{font-family:var(--font-serif-en),serif;font-size:11.5px;color:var(--vermillion);min-width:18px;letter-spacing:.04em}
.toc-name{font-size:13.5px;color:var(--ink-black);font-weight:600}
.toc-role{font-size:11px;color:var(--gray);display:block}
@media (max-width:760px){.endorse-toc{padding:18px 16px}.endorse-toc-list{grid-template-columns:1fr}}

/* Endorser bio block */
.endorse-bio{margin-top:16px;padding-top:16px;border-top:1px dashed rgba(169,50,38,.35)}
.endorse-bio-title{font-family:var(--font-serif-en),serif;font-size:13.5px;color:var(--vermillion);margin:0 0 10px;letter-spacing:.04em}
.endorse-bio-lead{font-size:13px;font-weight:700;color:var(--ink-black);margin:0 0 10px}
.endorse-bio-list{margin:0 0 10px;padding-left:18px;font-size:12.5px;line-height:1.7;color:var(--ink-mid)}
.endorse-bio-list li{margin-bottom:5px}
.endorse-bio-works{font-size:12.5px;line-height:1.7;color:var(--ink-mid);margin:0 0 12px}
.endorse-bio-links-label{font-size:12px;font-weight:600;color:var(--ink-soft);margin:0 0 8px}
.endorse-bio-links{list-style:none;margin:0;padding:0;font-size:12.5px;line-height:1.65}
.endorse-bio-links li{margin-bottom:6px;padding-left:14px;position:relative}
.endorse-bio-links li::before{content:'→';position:absolute;left:0;color:var(--vermillion);font-size:11px}
.endorse-bio-links a{color:var(--vermillion-deep);text-decoration:none;border-bottom:1px solid rgba(169,50,38,.3)}
.endorse-bio-links a:hover{color:var(--vermillion);border-bottom-color:var(--vermillion)}
/* anchor offset under fixed nav */
.endorse-card{scroll-margin-top:110px}
/* Links inside endorsement body text */
.endorse-p a{color:var(--vermillion-deep);text-decoration:none;border-bottom:1px solid rgba(169,50,38,.3);transition:color .18s,border-color .18s}
.endorse-p a:hover{color:var(--vermillion);border-bottom-color:var(--vermillion)}
.endorse-p em{font-style:italic}
/* Wide endorsement cards for long texts */
.endorse-card-wide{grid-column:1/-1}
@media (min-width:1100px){
  .endorse-card-wide .endorse-body{column-count:2;column-gap:34px}
  .endorse-card-wide .endorse-p{break-inside:avoid}
}

/* TOC: Front Matter / Back Matter list & chapter bullet points */
.toc-fm-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:8px 24px}
.toc-fm-list li{position:relative;padding:8px 0 8px 22px;font-size:14px;color:var(--ink-mid);border-bottom:1px dashed rgba(169,50,38,.18)}
.toc-fm-list li::before{content:'·';position:absolute;left:4px;color:var(--vermillion);font-weight:700}
@media (max-width:760px){.toc-fm-list{grid-template-columns:1fr}}
.toc-ch-points{margin:10px 0 0;padding-left:18px}
.toc-ch-points li{font-size:13px;line-height:1.75;color:var(--ink-mid);margin-bottom:6px}
.toc-ch-points li::marker{color:var(--vermillion)}
.preface-body a,.toc-ch-points a{color:var(--vermillion-deep);text-decoration:none;border-bottom:1px solid rgba(169,50,38,.3)}
.preface-body a:hover,.toc-ch-points a:hover{color:var(--vermillion);border-bottom-color:var(--vermillion)}
.dedication-thanks{margin-top:18px;padding-top:16px;border-top:1px dashed rgba(169,50,38,.35)}
.dedication-thanks-list{list-style:none;margin:.5rem 0 0;padding:0 0 0 1rem}
.dedication-thanks-list li{position:relative;padding:.18rem 0 .18rem .9rem;font-size:.92rem;line-height:1.75;color:var(--ink-mid)}
.dedication-thanks-list li::before{content:"\00b7";position:absolute;left:0;top:.1rem;color:var(--vermillion);font-weight:700}
.dedication-thanks-list a{color:var(--vermillion);text-decoration:none;border-bottom:1px dotted rgba(169,50,38,.5)}
.dedication-thanks-list a:hover{border-bottom-style:solid}
.dedication-thanks-list[lang]{font-family:var(--font-cn-body),serif}

/* ===== TOC: clickable chapter / sub-chapter links ===== */
.toc-link{display:inline;color:inherit;text-decoration:none;border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease}
.toc-link:hover,.toc-link:focus-visible{color:var(--vermillion);border-bottom-color:rgba(169,50,38,.45)}
.toc-row-ch .toc-cell-title .toc-link{font-weight:800}
.toc-table .toc-row .toc-cell-title .toc-points .toc-link{font-size:inherit;font-weight:400}

/* ===== 7.2 Appendix A · Classified Index of Quotes ===== */
.appendix-a .quote-wall{display:grid;gap:.7rem;margin:0 0 clamp(1.8rem,3vw,2.4rem);padding:clamp(1.1rem,2vw,1.5rem) clamp(1.1rem,2.2vw,1.6rem);background:rgba(169,50,38,.045);border-left:3px solid var(--vermillion);border-radius:6px}
.appendix-a .quote-wall p{margin:0;font-family:var(--font-serif-en);font-size:clamp(.98rem,1.15vw,1.06rem);line-height:1.75;color:var(--ink-black)}
.appendix-a .q-src{display:inline-block;margin-right:.5rem;color:var(--vermillion);font-family:var(--font-body);font-size:.88rem;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.appendix-a .q-zh{color:var(--ink-mid);font-family:var(--font-cn-body)}
/* citation of the original text (newly sourced aphorisms) */
.appendix-a .q-ref{display:inline-block;margin-left:.5rem;font-family:var(--font-body);font-size:.78rem;letter-spacing:.01em;color:var(--gray)}
.appendix-a .quote-cat{margin:clamp(1.9rem,3.4vw,2.5rem) 0 .85rem;padding-bottom:.42rem;border-bottom:1px solid rgba(169,50,38,.28);font-family:Georgia,'Times New Roman',serif;font-size:clamp(.95rem,1.4vw,1.08rem);font-weight:700;color:var(--ink-black);letter-spacing:.01em}
.appendix-a .quote-cat-cn{margin-left:.65rem;font-family:var(--font-cn-body);font-size:.98rem;font-weight:600;color:var(--vermillion)}
.appendix-a .quote-list{list-style:none;margin:0;padding:0}
.appendix-a .quote-list li{position:relative;padding:.55rem 0 .55rem 1.2rem;font-family:Georgia,'Times New Roman',serif;font-size:clamp(.85rem,1.0vw,.92rem);line-height:1.78;color:var(--ink-black);border-bottom:1px dashed rgba(169,50,38,.16)}
.appendix-a .quote-list li:last-child{border-bottom:0}
.appendix-a .quote-list li::before{content:"";position:absolute;left:.15rem;top:1.1rem;width:6px;height:6px;background:var(--vermillion);transform:rotate(45deg);opacity:.72}
@media (max-width:640px){
    .appendix-a .q-src{white-space:normal}
}

/* ===== 7.4 Sources & References ===== */
.references .ref-cat{margin:clamp(1.9rem,3.4vw,2.5rem) 0 .85rem;padding-bottom:.42rem;border-bottom:1px solid rgba(169,50,38,.28);font-family:var(--font-serif-en);font-size:clamp(1.06rem,1.6vw,1.22rem);font-weight:700;color:var(--ink-black);letter-spacing:.01em}
.references .ref-cat:first-of-type{margin-top:clamp(1.3rem,2.2vw,1.8rem)}
.references .ref-cat-cn{margin-left:.65rem;font-family:var(--font-cn-body);font-size:.98rem;font-weight:600;color:var(--vermillion)}
.references .ref-list{list-style:none;margin:0;padding:0}
.references .ref-list li{position:relative;padding:.55rem 0 .55rem 1.2rem;font-family:var(--font-serif-en);font-size:clamp(.95rem,1.1vw,1.02rem);line-height:1.78;color:var(--ink-black);border-bottom:1px dashed rgba(169,50,38,.16)}
.references .ref-list li:last-child{border-bottom:0}
.references .ref-list li::before{content:"";position:absolute;left:.15rem;top:1.1rem;width:6px;height:6px;background:var(--vermillion);transform:rotate(45deg);opacity:.72}
.references .ref-src{margin-right:.45rem;color:var(--vermillion);font-family:var(--font-body);font-size:.88rem;font-weight:700;letter-spacing:.02em}
.references .ref-zh{font-family:var(--font-cn-body);color:var(--ink-black)}
.references .ref-en{font-style:italic}

/* Dedication: Mayer Lutheran HS / University of Minnesota tribute block */
.dedication-mlhs{margin-top:clamp(2.4rem,4vw,3.2rem);padding-top:clamp(1.6rem,3vw,2.2rem);border-top:1px dashed rgba(169,50,38,.35)}
.dedication-mlhs .dedication-subhead{font-family:var(--font-cn-body),var(--font-serif-en);font-size:clamp(1.05rem,1.75vw,1.3rem);font-weight:700;line-height:1.5;color:var(--ink-black);margin:clamp(1.9rem,3.2vw,2.5rem) 0 .9rem;letter-spacing:.01em}
.dedication-mlhs .dedication-subhead:first-child{margin-top:0}
.dedication-mlhs .dedication-sign{margin-top:1.9rem;font-family:var(--font-serif-en);font-style:italic;font-size:1.05rem;color:var(--ink-black);text-align:right}

/* Dedication opening list — This book is dedicated to / 謹以此書獻給 */
.dedication-dedicate{max-width:780px;margin:0 auto clamp(2rem,4vw,2.8rem);padding:clamp(1.4rem,2.6vw,2rem) clamp(1.2rem,2.6vw,1.9rem);background:rgba(169,50,38,.045);border:1px solid rgba(169,50,38,.18);border-radius:10px}
.dedication-ded-lead{font-family:var(--font-serif-en);font-size:clamp(1.08rem,1.7vw,1.25rem);font-weight:600;letter-spacing:.03em;color:var(--ink-black);margin-bottom:.9rem}
.dedication-ded-list{list-style:none;margin:0;padding:0}
.dedication-ded-list li{position:relative;padding:.28rem 0 .28rem 1.15rem;font-family:var(--font-body);font-size:clamp(.97rem,1.2vw,1.05rem);line-height:1.75;color:var(--ink-mid)}
.dedication-ded-list li::before{content:'·';position:absolute;left:.15rem;top:.28rem;color:var(--vermillion);font-weight:700}
.dedication-ded-sig{margin-top:1.1rem;font-family:var(--font-serif-en);font-style:italic;font-size:1.05rem;color:var(--ink-black);text-align:right}
.dedication-ded-cn{margin-top:clamp(1.4rem,2.6vw,1.9rem);padding-top:clamp(1.1rem,2vw,1.5rem);border-top:1px dashed rgba(169,50,38,.32)}
.dedication-ded-cn .dedication-ded-lead{font-family:var(--font-cn-body),var(--font-serif-en)}

/* ============================================
   TABLE OF CONTENTS — standard TOC list table (v4)
   Replaces the card layout with a printed-book
   style list: front/back matter, six parts, nine
   chapters, each with its detail lines.
   ============================================ */
.toc-table{width:100%;border-collapse:collapse;table-layout:fixed;margin:clamp(1.6rem,3vw,2.4rem) 0 0}
.toc-col-num{width:104px}
.toc-table td{vertical-align:top}

/* Part / matter divider rows */
.toc-row-sec td{padding:clamp(1.6rem,3vw,2.4rem) 0 .7rem;border-bottom:2px solid var(--vermillion)}
.toc-table tbody tr.toc-row-sec:first-child td{padding-top:.4rem}
.toc-sec-en{display:block;font-family:var(--font-body);font-style:italic;font-weight:800;font-size:.88rem;letter-spacing:.22em;text-transform:uppercase;color:var(--vermillion);margin-bottom:.45rem}
.toc-sec-zh{font-family:var(--font-cn-body);font-size:clamp(1.4rem,2.6vw,1.85rem);font-weight:800;color:var(--ink-black);letter-spacing:.03em;line-height:1.35}

/* Entry rows */
.toc-row .toc-cell-num{padding:.75rem 1.1rem .75rem 0;font-family:var(--font-body);font-size:.74rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--vermillion);white-space:nowrap;border-bottom:1px dotted rgba(169,50,38,.28)}
.toc-row .toc-cell-title{padding:.75rem 0;font-family:var(--font-body);font-size:clamp(.95rem,1.1vw,1.03rem);font-weight:600;color:var(--ink-black);line-height:1.55;border-bottom:1px dotted rgba(169,50,38,.28);transition:color .18s ease}
.toc-row:hover .toc-cell-title{color:var(--vermillion-deep)}

/* Chapter headings — larger, bold */
.toc-row-ch .toc-cell-num{font-size:.82rem;letter-spacing:.16em}
.toc-row-ch .toc-cell-title{font-family:var(--font-serif-en),var(--font-cn-body),serif;font-size:clamp(1.18rem,2vw,1.5rem);font-weight:800;line-height:1.45;letter-spacing:.01em}

/* Chapter detail lines */
.toc-points{list-style:none;margin:.65rem 0 .15rem;padding:0}
.toc-points li{position:relative;padding-left:1.15rem;font-family:var(--font-body);font-weight:400;font-size:.85rem;line-height:1.7;color:var(--ink-mid);margin-bottom:.4rem}
.toc-points li:last-child{margin-bottom:0}
.toc-points li::before{content:'—';position:absolute;left:0;top:0;font-size:.78rem;color:rgba(169,50,38,.55)}

@media (max-width:760px){
    .toc-table,.toc-table tbody,.toc-table tr,.toc-table td{display:block;width:100%}
    .toc-col-num{width:auto}
    .toc-row .toc-cell-num{padding:.7rem 0 0;border-bottom:0;font-size:.68rem;letter-spacing:.12em}
    .toc-row .toc-cell-title{padding:.2rem 0 .8rem;font-size:.95rem}
    .toc-row-ch .toc-cell-num{font-size:.74rem}
    .toc-row-ch .toc-cell-title{font-size:1.18rem}
    .toc-sec-en{font-size:.8rem}
    .toc-sec-zh{font-size:1.32rem}
    .toc-row-sec td{padding-top:1.7rem}
    .toc-points li{font-size:.82rem}
}

/* ============================================
   CO-EDITORS · 编者 (sits before Dedication)
   ============================================ */
.coeditors{background:var(--paper-warm);position:relative}
.coeditor-container{max-width:960px}
.coeditor{position:relative;margin-top:clamp(1.8rem,3.5vw,2.8rem);padding:clamp(1.3rem,2.4vw,2.1rem) clamp(1.2rem,2.4vw,2.3rem) clamp(1.1rem,2vw,1.7rem);background:var(--paper);border:1px solid var(--paper-shadow);border-radius:var(--radius);scroll-margin-top:110px}
.coeditor::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--vermillion);border-radius:var(--radius) 0 0 var(--radius)}
.coeditor-head{display:flex;gap:1rem;align-items:flex-start;padding-bottom:.9rem;border-bottom:1px solid rgba(169,50,38,.22)}
.coeditor-num{font-family:var(--font-body);font-size:.78rem;font-weight:700;letter-spacing:.14em;color:var(--vermillion);padding-top:.4rem;min-width:2.1rem}
.coeditor-name{font-family:var(--font-serif-en);font-size:clamp(1.12rem,1.7vw,1.4rem);font-weight:600;color:var(--ink-black);margin:0 0 .3rem;line-height:1.3}
.coeditor-role{font-family:var(--font-body);font-size:.78rem;line-height:1.6;color:var(--gray);margin:0}
.coeditor-letter{margin-top:1.1rem}
.coeditor-letter p{font-family:var(--font-body);font-size:clamp(.95rem,1.15vw,1.02rem);line-height:1.9;color:var(--ink-mid);margin-bottom:1.05rem;text-align:justify;text-justify:inter-word}
.coeditor-letter p:last-child{margin-bottom:0}
.coeditor-letter em{font-style:italic}
.coeditor-letter a{color:var(--vermillion-deep);text-decoration:none;border-bottom:1px solid rgba(169,50,38,.3);transition:color .18s,border-color .18s}
.coeditor-letter a:hover{color:var(--vermillion);border-bottom-color:var(--vermillion)}
.coeditor-letter .coeditor-sig{font-size:.9rem;font-style:italic;color:var(--vermillion);text-align:right;margin-top:1rem}
.coeditor-bio,.coeditor-note{margin-top:1.3rem;padding-top:1.1rem;border-top:1px dashed rgba(169,50,38,.35)}
.coeditor-bio p,.coeditor-note p{font-family:var(--font-body);font-size:.85rem;line-height:1.75;color:var(--gray);margin-bottom:.7rem;text-align:justify;text-justify:inter-word}
.coeditor-bio p:last-child,.coeditor-note p:last-child{margin-bottom:0}
.coeditor-bio .coeditor-bio-title{font-weight:700;color:var(--ink-black);letter-spacing:.04em;font-size:.86rem}
.coeditor-note a{color:var(--vermillion-deep);text-decoration:none;border-bottom:1px solid rgba(169,50,38,.3)}
.coeditor-note a:hover{color:var(--vermillion)}
@media (max-width:760px){
    .coeditor-head{flex-direction:column;gap:.4rem}
    .coeditor-num{padding-top:0}
    .coeditor-letter p,.coeditor-bio p,.coeditor-note p{text-align:left;font-size:.94rem;line-height:1.85}
    .coeditor-letter .coeditor-sig{text-align:left}
}

/* ============================================
   NAV — small phones (<=420px)
   Keep all five items visible on one or two lines
   without a hamburger; tighten sizes so they fit.
   ============================================ */
@media (max-width: 420px) {
    .nav-inner { padding: 0.45rem 0.3rem 0.4rem; gap: 0.02rem; }
    .nav-brand { gap: 0.22rem; }
    .nav-brand .brand-en { font-size: 0.94rem; }
    .nav-brand .brand-cn { font-size: 0.74rem; }
    .nav-links { gap: 0; }
    .nav-links a { font-size: 0.72rem; padding: 0.26rem 0.22rem; letter-spacing: 0; }
    section[id], .endorse-card, .coeditor { scroll-margin-top: 74px; }
}

/* ============================================
   PREFACE — Chinese 自序 (sits before the
   signature / seal chop)
   ============================================ */
.preface-cn {
    max-width: 780px;
    margin: clamp(2.6rem, 5vw, 3.6rem) auto 0;
    padding-top: clamp(1.8rem, 3vw, 2.4rem);
    border-top: 1px dashed rgba(169, 50, 38, 0.35);
}
.preface-cn-title {
    font-family: var(--font-cn-body);
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    font-weight: 700;
    color: var(--ink-black);
    letter-spacing: 0.04em;
    text-align: center;
    margin: 0 0 1.4rem;
    line-height: 1.5;
}
/* ============================================
   7.6 Afterword — Tong Legacy & A Father's Pride
   ============================================ */
.afterword .aw-head {
    font-family: var(--font-serif-en);
    font-size: clamp(1.05rem, 1.7vw, 1.25rem);
    font-weight: 700;
    color: var(--ink-black);
    letter-spacing: 0.01em;
    margin: clamp(1.9rem, 3.2vw, 2.4rem) 0 0.85rem;
}
.afterword .aw-head:first-child { margin-top: 0; }
.afterword .aw-head-cn {
    font-family: var(--font-cn-body);
    font-size: clamp(1.08rem, 1.8vw, 1.3rem);
    font-weight: 700;
    color: var(--ink-black);
    letter-spacing: 0.02em;
    margin: clamp(1.9rem, 3.2vw, 2.4rem) 0 0.85rem;
}
.afterword .aw-head-cn:first-child { margin-top: 0; }
.afterword .aw-sign {
    margin-top: 1.9rem;
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: 1.02rem;
    line-height: 1.65;
    color: var(--ink-black);
    text-align: right;
}
.afterword .preface-cn .aw-sign {
    font-family: var(--font-cn-body);
    font-style: normal;
}
.preface-cn-quote {
    text-align: center;
    margin-bottom: clamp(1.8rem, 3.5vw, 2.6rem);
    padding: 1.2rem 1rem;
    background: var(--paper-warm, rgba(184, 146, 58, 0.06));
    border-radius: var(--radius, 10px);
}
.preface-cn-quote-zh {
    font-family: var(--font-cn-body);
    font-size: clamp(1.35rem, 2.4vw, 1.8rem);
    font-weight: 700;
    color: var(--vermillion);
    letter-spacing: 0.12em;
    margin: 0 0 0.6rem;
    line-height: 1.5;
}
.preface-cn-quote-en {
    font-family: var(--font-body);
    font-style: italic;
    font-size: 0.92rem;
    color: var(--gray);
    margin: 0;
    line-height: 1.7;
}
.preface-cn > p {
    font-family: var(--font-cn-body);
    font-size: clamp(1rem, 1.25vw, 1.1rem);
    line-height: 2.05;
    color: var(--ink-mid);
    margin-bottom: 1.4rem;
    text-align: justify;
    text-justify: inter-ideograph;
}
.preface-cn > p:last-child { margin-bottom: 0; }
@media (max-width: 640px) {
    .preface-cn > p { font-size: 1rem; line-height: 1.95; text-align: left; }
    .preface-cn-quote-zh { letter-spacing: 0.06em; }
}

/* ============================================
   PREFACE — framed Chinese 自序 + signature/seal
   ============================================ */
.preface-frame {
    position: relative;
    max-width: 848px;
    margin: clamp(2.6rem, 5vw, 3.6rem) auto 0;
    padding: 2.2rem 2.05rem 1.5rem;
    border: 1px solid rgba(169, 50, 38, 0.38);
    border-radius: 14px;
    background: rgba(169, 50, 38, 0.028);
}
.preface-frame::before {
    content: '';
    position: absolute;
    inset: 6px;
    border: 1px dashed rgba(169, 50, 38, 0.20);
    border-radius: 10px;
    pointer-events: none;
}
.preface-frame .preface-cn {
    max-width: 100%;
    margin: 0;
    padding-top: 0;
    border-top: 0;
}
.preface-frame .preface-signature {
    max-width: 100%;
    margin: clamp(1.8rem, 3vw, 2.4rem) 0 0;
}
@media (max-width: 640px) {
    .preface-frame { padding: 1.4rem 1.1rem 1rem; }
}

/* ============================================
   7.3 · CORE TERMINOLOGY GLOSSARY · 核心术语中英对照
   Four-column bilingual glossary table.
   ============================================ */
.glossary { background: var(--paper-warm); }
.glossary-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin-top: clamp(1.6rem, 3vw, 2.4rem); }
.glossary-table { width: 100%; min-width: 720px; border-collapse: collapse; background: var(--paper, #fff); font-size: 0.95rem; }
.glossary-table th {
    font-family: var(--font-body);
    text-align: left;
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--vermillion-deep, var(--vermillion));
    padding: 0.9rem 1rem;
    border-bottom: 2px solid var(--ink-black);
    white-space: nowrap;
}
.glossary-table td {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid rgba(169, 50, 38, 0.16);
    vertical-align: top;
    line-height: 1.65;
}
.glossary-table tbody tr:nth-child(even) td { background: rgba(184, 146, 58, 0.06); }
.glossary-table tbody tr:last-child td { border-bottom: 2px solid var(--ink-black); }
.glossary-zh { font-family: var(--font-cn-body); font-size: 1.18rem; font-weight: 700; color: var(--ink-black); white-space: nowrap; }
.glossary-py { font-style: italic; color: var(--gray); white-space: nowrap; }
.glossary-en { font-weight: 700; color: var(--ink-black); }
.glossary-def { color: var(--ink-mid); min-width: 240px; }
@media (max-width: 640px) {
    .glossary-zh { font-size: 1.08rem; }
    .glossary-table { font-size: 0.88rem; }
    .glossary-table th, .glossary-table td { padding: 0.75rem 0.8rem; }
}

/* ============================================
   XIV. READERS' BLOG · 读者博客
   Public message board: post form + live stream.
   ============================================ */
.readers-blog { background: var(--paper-warm); }
/* The message board gets a wider canvas than the text sections, so the
   Reader's Message box is as wide as the screen comfortably allows. */
.readers-blog .container { max-width: 1420px; }

.blog-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(1.6rem, 3vw, 2.4rem);
    align-items: start;
    margin-top: clamp(1.8rem, 3.5vw, 2.6rem);
}

/* ---- Form ---- */
.blog-form {
    background: var(--paper);
    border: 1px solid rgba(10, 10, 10, 0.08);
    border-radius: var(--radius);
    padding: clamp(1.5rem, 2.6vw, 2.25rem);
    box-shadow: 0 18px 50px -30px rgba(10, 10, 10, 0.35);
}
.blog-form-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.6rem 1.2rem;
    margin: 0 0 1.5rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid rgba(169, 50, 38, 0.22);
}
.blog-form-title {
    font-family: var(--font-serif-en);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--ink-black);
    margin: 0;
}
.blog-window {
    font-size: 0.74rem;
    letter-spacing: 0.05em;
    color: var(--vermillion);
    background: rgba(169, 50, 38, 0.06);
    border: 1px solid rgba(169, 50, 38, 0.24);
    border-radius: 999px;
    padding: 0.35rem 0.85rem;
    white-space: nowrap;
}

/* ---- Editing banner ---- */
.blog-edit-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.6rem 1rem;
    margin: 0 0 1.4rem;
    padding: 0.7rem 1rem;
    background: rgba(169, 50, 38, 0.06);
    border: 1px solid rgba(169, 50, 38, 0.3);
    border-radius: var(--radius);
}
.blog-edit-banner[hidden] { display: none; }
.blog-edit-banner-text {
    font-size: 0.82rem;
    letter-spacing: 0.04em;
    color: var(--vermillion);
    font-weight: 600;
}
.blog-edit-cancel {
    background: none;
    border: 0;
    padding: 0;
    font-family: inherit;
    font-size: 0.78rem;
    color: var(--ink-mid);
    text-decoration: underline;
    cursor: pointer;
}
.blog-edit-cancel:hover { color: var(--vermillion); }

.blog-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1.1rem;
}
.blog-field {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-bottom: 1.2rem;
    position: relative;
}
.blog-field label {
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gray);
    font-weight: 500;
}
.blog-field .req { color: var(--vermillion); }
.blog-field input,
.blog-field textarea {
    width: 100%;
    padding: 0.9rem 1.05rem;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--ink-black);
    background: var(--paper);
    border: 1.5px solid rgba(10, 10, 10, 0.15);
    border-radius: var(--radius);
    transition: border-color .2s ease, box-shadow .2s ease;
    resize: vertical;
}
.blog-field input:focus,
.blog-field textarea:focus {
    outline: none;
    border-color: var(--vermillion);
    box-shadow: 0 0 0 3px rgba(169, 50, 38, 0.08);
}
.blog-field input::placeholder,
.blog-field textarea::placeholder { color: var(--gray-light); }
.blog-field input.invalid,
.blog-field textarea.invalid {
    border-color: var(--vermillion);
    background: rgba(169, 50, 38, 0.03);
}

/* ---- Message box: wide, compact (6 rows tall) ---- */
.blog-field-message { margin-bottom: 1.5rem; }
.blog-field-message label { font-size: 0.9rem; color: var(--ink-mid); }
.blog-field-message textarea {
    display: block;
    width: 100%;
    min-height: clamp(190px, 28vh, 260px);
    padding: 1.4rem 1.6rem;
    font-size: 1.15rem;
    line-height: 2.05;
    resize: vertical;
}
.blog-field-message textarea:focus {
    box-shadow: 0 0 0 4px rgba(169, 50, 38, 0.1);
}

/* ---- Automatic date / time ---- */
.blog-field-auto .blog-auto-time {
    margin: 0;
    padding: 0.35rem 0 0.15rem;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    color: var(--ink-mid);
    font-variant-numeric: tabular-nums;
}
.blog-counter {
    align-self: flex-end;
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--gray-light);
}
.blog-counter.near-limit { color: var(--vermillion); }

/* ---- Star rating: an obvious, clickable gold bar ---- */
.blog-rating-hint {
    display: inline-block;
    margin-left: 0.45rem;
    padding: 0.18rem 0.62rem;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: none;
    color: #fff;
    background: var(--vermillion);
    border-radius: 999px;
    box-shadow: 0 4px 10px -6px rgba(169, 50, 38, 0.75);
}
.blog-stars {
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    gap: 0.18rem;
    width: fit-content;
    padding: 0.6rem 1.05rem;
    background: linear-gradient(180deg, rgba(216, 163, 33, 0.1), rgba(216, 163, 33, 0.04));
    border: 2px solid rgba(184, 146, 58, 0.75);
    border-radius: 999px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7), 0 10px 24px -18px rgba(10, 10, 10, 0.6);
    cursor: pointer;
    transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
/* The gold colour bar grows with the score — a visible fill, not just stars. */
.blog-stars::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: calc(var(--rate, 5) / 5 * 100%);
    background: linear-gradient(90deg, rgba(217, 163, 39, 0.34), rgba(233, 181, 48, 0.62));
    border-radius: 999px 0 0 999px;
    transition: width .3s cubic-bezier(.4, 0, .2, 1);
    pointer-events: none;
}
.blog-stars:hover {
    border-color: #b8923a;
    box-shadow: 0 0 0 5px rgba(184, 146, 58, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.7);
}
.blog-star {
    position: relative;
    z-index: 1;
    background: none;
    border: 0;
    padding: 0.05rem 0.14rem;
    font-size: 2.35rem;
    line-height: 1;
    color: rgba(10, 10, 10, 0.2);
    cursor: pointer;
    transition: color .15s ease, transform .15s ease;
}
.blog-star:hover { transform: scale(1.22); }
.blog-star.on {
    color: #d4a017;
    text-shadow: 0 1px 2px rgba(120, 84, 6, 0.35);
}
.blog-star:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(169, 50, 38, 0.25);
    border-radius: 6px;
}
.blog-rating-text {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.2rem 0.68rem;
    font-size: 0.88rem;
    font-weight: 700;
    color: #8a6420;
    background: rgba(217, 163, 39, 0.16);
    border-radius: 999px;
    letter-spacing: 0.04em;
}

/* ---- Actions / status ---- */
.blog-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 0.4rem;
}
.blog-actions .btn { padding: 1rem 1.9rem; }
.blog-status { font-size: 0.88rem; line-height: 1.5; }
.blog-status.ok { color: #2f7a4f; }
.blog-status.err { color: var(--vermillion); }
.blog-status.pending { color: var(--gray); }
.blog-status a { color: var(--vermillion); text-decoration: underline; }
.blog-note {
    margin: 0.9rem 0 0;
    font-size: 0.78rem;
    line-height: 1.6;
    color: var(--gray-light);
}

/* ---- Stream ---- */
.blog-stream {
    background: var(--paper);
    border: 1px solid rgba(10, 10, 10, 0.08);
    border-radius: var(--radius);
    padding: clamp(1.4rem, 2.4vw, 2rem);
}
.blog-stream-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid rgba(169, 50, 38, 0.22);
    margin-bottom: 1.3rem;
}
.blog-stream-head h3 {
    font-family: var(--font-serif-en);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--ink-black);
    margin: 0;
}
.blog-count {
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    color: var(--gray);
    white-space: nowrap;
}
.blog-posts { display: flex; flex-direction: column; gap: 1.05rem; }
.blog-card {
    position: relative;
    padding: 1.15rem 1.3rem 1.2rem;
    background: var(--paper);
    border: 1px solid var(--paper-shadow, rgba(10, 10, 10, 0.1));
    border-radius: var(--radius);
    box-shadow: 0 10px 30px -26px rgba(10, 10, 10, 0.4);
}
.blog-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--vermillion);
    border-radius: var(--radius) 0 0 var(--radius);
}
.blog-card-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.35rem 0.8rem;
    margin-bottom: 0.55rem;
}
.blog-card-name {
    font-family: var(--font-serif-en);
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--ink-black);
    margin: 0;
}
.blog-card-stars {
    font-size: 0.9rem;
    letter-spacing: 0.12em;
    color: #b8923a;
    white-space: nowrap;
}
.blog-card-stars .off { color: rgba(10, 10, 10, 0.15); }
.blog-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem 0.9rem;
    font-size: 0.76rem;
    letter-spacing: 0.04em;
    color: var(--gray-light);
    margin-bottom: 0.65rem;
}
.blog-card-message {
    font-family: var(--font-body);
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--ink-mid);
    margin: 0;
    max-width: 82ch;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

/* ---- Your own post: 10-minute withdraw / rewrite bar ---- */
.blog-card-owned { background: rgba(169, 50, 38, 0.022); }
.blog-card-own {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.7rem;
    margin-top: 1rem;
    padding-top: 0.9rem;
    border-top: 1px dashed rgba(169, 50, 38, 0.3);
}
.blog-card-own-label {
    font-size: 0.66rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--vermillion);
}
.blog-card-timer {
    font-size: 0.74rem;
    letter-spacing: 0.04em;
    color: var(--gray);
    font-variant-numeric: tabular-nums;
    background: var(--paper-warm);
    border: 1px solid rgba(10, 10, 10, 0.07);
    border-radius: 999px;
    padding: 0.22rem 0.65rem;
}
.blog-card-btn {
    font-family: inherit;
    font-size: 0.78rem;
    letter-spacing: 0.03em;
    line-height: 1.2;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    border: 1px solid rgba(10, 10, 10, 0.2);
    background: var(--paper);
    color: var(--ink-mid);
    transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.blog-card-btn:hover {
    border-color: var(--ink-black);
    color: var(--ink-black);
}
.blog-card-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(169, 50, 38, 0.18);
}
.blog-card-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.blog-card-btn-danger {
    margin-left: auto;
    color: var(--vermillion);
    border-color: rgba(169, 50, 38, 0.38);
}
.blog-card-btn-danger:hover {
    background: var(--vermillion);
    border-color: var(--vermillion);
    color: #fff;
}
.blog-loading,
.blog-empty,
.blog-notice {
    font-size: 0.9rem;
    line-height: 1.75;
    color: var(--gray);
    margin: 0;
}
.blog-notice {
    padding: 0.95rem 1.1rem;
    background: var(--paper-warm);
    border: 1px dashed rgba(169, 50, 38, 0.35);
    border-radius: var(--radius);
}
.blog-stream-foot {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-top: 1.2rem;
}
.blog-stream-foot .btn { padding: 0.7rem 1.4rem; font-size: 0.85rem; }

/* ---- Hidden author / moderation panel ---- */
.blog-admin {
    margin-top: 1rem;
    padding-top: 0.9rem;
    border-top: 1px dashed rgba(10, 10, 10, 0.1);
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}
.blog-admin-toggle {
    background: none;
    border: 0;
    padding: 0.2rem 0;
    font-family: inherit;
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gray-light);
    cursor: pointer;
    transition: color .18s ease;
}
.blog-admin-toggle:hover { color: var(--vermillion); }
.blog-admin-panel {
    width: 100%;
    margin-top: 0.8rem;
    padding: 1rem 1.1rem;
    background: var(--paper-warm);
    border: 1px solid rgba(10, 10, 10, 0.1);
    border-radius: var(--radius);
}
.blog-admin-panel[hidden] { display: none; }
.blog-admin-panel.unlocked { border-color: rgba(47, 122, 79, 0.4); }
.blog-admin-label {
    display: block;
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gray);
    margin-bottom: 0.5rem;
}
.blog-admin-row {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}
.blog-admin-row input {
    flex: 1 1 220px;
    min-width: 0;
    padding: 0.7rem 0.9rem;
    font-family: inherit;
    font-size: 0.9rem;
    letter-spacing: 0.06em;
    color: var(--ink-black);
    background: var(--paper);
    border: 1.5px solid rgba(10, 10, 10, 0.15);
    border-radius: var(--radius);
}
.blog-admin-row input:focus {
    outline: none;
    border-color: var(--vermillion);
    box-shadow: 0 0 0 3px rgba(169, 50, 38, 0.08);
}
.blog-admin-btn { padding: 0.7rem 1.3rem; font-size: 0.82rem; }
.blog-admin-link {
    background: none;
    border: 0;
    padding: 0.7rem 0.2rem;
    font-family: inherit;
    font-size: 0.78rem;
    color: var(--gray);
    text-decoration: underline;
    cursor: pointer;
}
.blog-admin-link:hover { color: var(--vermillion); }
.blog-admin-status {
    display: block;
    margin-top: 0.6rem;
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--gray);
}
.blog-admin-status.ok { color: #2f7a4f; }
.blog-admin-status.err { color: var(--vermillion); }
.blog-admin-note {
    margin: 0.5rem 0 0;
    font-size: 0.72rem;
    line-height: 1.6;
    color: var(--gray-light);
}

/* Delete button that appears on every card while unlocked */
.blog-card-admin-del {
    position: absolute;
    top: 0.85rem;
    right: 0.9rem;
    z-index: 2;
    font-family: inherit;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    cursor: pointer;
    padding: 0.34rem 0.7rem;
    border-radius: 999px;
    border: 1px solid rgba(169, 50, 38, 0.4);
    background: var(--paper);
    color: var(--vermillion);
    transition: background .18s ease, color .18s ease;
}
.blog-card-admin-del:hover {
    background: var(--vermillion);
    border-color: var(--vermillion);
    color: #fff;
}
.blog-card-admin-del:disabled { opacity: 0.5; cursor: not-allowed; }
.blog-admin-mode .blog-card-head { padding-right: 5.6rem; }

/* Two fields per row once there is room (Name + Rating · Location + Date/Time) */
@media (min-width: 720px) {
    .blog-row { grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 1.1rem 1.6rem; }
}
@media (max-width: 720px) {
    .blog-form-head { align-items: flex-start; }
    .blog-window { white-space: normal; }
    /* Phones: strip the side gutters so the message box runs the full screen width. */
    .readers-blog .container { padding-left: 0.6rem; padding-right: 0.6rem; }
    .blog-form { padding: 1rem 0.6rem 1.15rem; }
    .blog-stars { gap: 0.06rem; padding: 0.5rem 0.7rem; }
    .blog-star { font-size: 2.15rem; }
    .blog-field-message { margin-bottom: 1.1rem; }
    .blog-field-message textarea {
        width: calc(100% + 1.2rem);
        margin: 0 -0.6rem;
        min-height: clamp(180px, 26vh, 240px);
        padding: 1rem 0.9rem;
        font-size: 1.1rem;
        line-height: 2;
        border-radius: 10px;
    }
    .blog-card-own-label { width: 100%; }
    .blog-card-btn-danger { margin-left: 0; }
    .blog-card-btn { flex: 1 1 auto; }
    .blog-admin { align-items: stretch; }
    .blog-admin-toggle { text-align: right; }
    .blog-admin-mode .blog-card-head { padding-right: 4.6rem; }
    .blog-card-admin-del { font-size: 0.66rem; padding: 0.3rem 0.6rem; }
}

/* ============================================
   CH 2.2 — framed "The Eight Virtues at a Glance"
   Vermillion frame, matching .concept-frame / .preface-frame
   ============================================ */
.virtues-frame {
    position: relative;
    margin: clamp(2rem, 4vw, 3rem) 0;
    padding: clamp(1.6rem, 3vw, 2.4rem) clamp(1.3rem, 2.8vw, 2.2rem) clamp(0.8rem, 1.8vw, 1.2rem);
    border: 1px solid rgba(169, 50, 38, 0.38);
    border-radius: 14px;
    background: rgba(169, 50, 38, 0.028);
}
.virtues-frame::before {
    content: '';
    position: absolute;
    inset: 6px;
    border: 1px dashed rgba(169, 50, 38, 0.20);
    border-radius: 10px;
    pointer-events: none;
}
.virtues-frame h3 {
    margin-top: 0;
    padding: 0 0.4rem;
}
.virtues-frame .compare-table-wrap { margin-bottom: 0.8rem; }
@media (max-width: 640px) {
    .virtues-frame { padding: 1.2rem 0.8rem 0.6rem; }
    .virtues-frame::before { inset: 4px; }
}

/* ============================================
   REFERENCE LINK TABLES — column widths + smallest URL text
   .refs-links-table = （二）核心文章与演讲链接
   ============================================ */
.refs-links-table {
    table-layout: fixed;
    min-width: 560px;
}
.refs-links-table th:nth-child(1),
.refs-links-table td:nth-child(1) { width: 54%; }
.refs-links-table th:nth-child(2),
.refs-links-table td:nth-child(2) { width: 20%; }
.refs-links-table th:nth-child(3),
.refs-links-table td:nth-child(3) { width: 26%; }

/* ============================================
   SITE-WIDE URL LINK TEXT
   Every anchor that displays a raw URL / domain as its visible
   text carries class="urltext" (plus the table + copyright
   selectors below as a safety net). Rules:
     - plain system sans face (never the decorative Lugrasimo
       serif and never the body serif)
     - font-style normal -> kills the italic inherited from
       .coeditor-sig and similar italic paragraphs
     - regular weight, no letter-spacing, no small-caps
     - small: relative 0.78em so it stays small inside prose,
       absolute 8px in tables (standalone URL lists)
   ============================================ */
a.urltext,
.book-copyright a,
table td a[href^="http"],
table th a[href^="http"] {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'Microsoft YaHei', sans-serif;
    font-style: normal;
    font-weight: 400;
    letter-spacing: 0;
    text-transform: none;
    word-break: break-all;
    overflow-wrap: anywhere;
}
a.urltext {
    font-size: 0.78em;
    line-height: 1.35;
}

/* Standalone URL link text inside any table cell — the smallest size */
table td a[href^="http"],
table th a[href^="http"] {
    font-size: 8px;
    line-height: 1.4;
}

/* ============================================
   GENERIC RED FRAME (.ru-frame)
   Same treatment as .concept-frame / .preface-frame / .virtues-frame
   ============================================ */
.ru-frame {
    position: relative;
    margin: clamp(1.8rem, 3.5vw, 2.6rem) 0;
    padding: clamp(1.5rem, 3vw, 2.2rem) clamp(1.2rem, 2.6vw, 2rem) clamp(1.2rem, 2.4vw, 1.8rem);
    border: 1px solid rgba(169, 50, 38, 0.38);
    border-radius: 14px;
    background: rgba(169, 50, 38, 0.028);
}
.ru-frame::before {
    content: '';
    position: absolute;
    inset: 6px;
    border: 1px dashed rgba(169, 50, 38, 0.20);
    border-radius: 10px;
    pointer-events: none;
}
.ru-frame > :first-child { margin-top: 0; }
.ru-frame > :last-child { margin-bottom: 0; }
.ru-frame .compare-table-wrap:last-child { margin-bottom: 0; }
.ru-frame .dedication-subhead { margin-bottom: 1.1rem; }
@media (max-width: 640px) {
    .ru-frame { padding: 1.1rem 0.8rem 1rem; }
    .ru-frame::before { inset: 4px; }
}

/* ============================================
   CHAPTER HEADER BAND — red bar (2cm tall, full page width)
   A real <div class="chapter-band"> element is the first child of
   every major section (numbered I.-XIV., Preface, Co-Editors,
   Dedication, 7.2-7.6 reference sections and every online chapter).
   A real element is used instead of ::before so it never collides
   with the decorative watermark pseudo-elements already defined
   on .contents / .editions / .pillars / .principles / .lineage /
   .preorder (which use their own ::before).
   ============================================ */
.chapter-band {
    display: block;
    width: 100%;
    height: 2cm;
    margin-top: calc(var(--section-py) * -1);
    margin-bottom: clamp(2.4rem, 5vw, 4rem);
    background: var(--vermillion);
}

/* ============================================
   7.6 AFTERWORD — smaller two-line sub-title
   ============================================ */
.afterword-subtitle {
    display: block;
    margin-top: 0.85rem;
    font-family: var(--font-serif-en);
    font-size: 0.44em;
    font-weight: 400;
    font-style: normal;
    line-height: 1.65;
    letter-spacing: 0.02em;
    color: var(--ink-mid);
}
.afterword-subtitle em { font-style: italic; }
@media (max-width: 640px) {
    .afterword-subtitle { font-size: 0.5em; margin-top: 0.6rem; line-height: 1.6; }
}

/* ============================================
   REFERENCE TABLES — 来源 (source) column at 10px
   ============================================ */
.refs-links-table th:nth-child(2),
.refs-links-table td:nth-child(2) {
    font-size: 10px;
    line-height: 1.6;
}

/* ============================================
   BOOK META — copyright notice, very small text
   ============================================ */
.book-copyright {
    margin: 0.9rem 0 0;
    max-width: 640px;
    font-family: var(--font-body);
    font-size: 6px;
    line-height: 1.6;
    letter-spacing: 0.01em;
    color: var(--ink-soft);
}
.book-copyright a {
    color: var(--ink-soft);
    text-decoration: none;
    border-bottom: 1px solid rgba(169, 50, 38, 0.28);
    word-break: break-all;
}
.book-copyright a:hover { color: var(--vermillion); }
@media (max-width: 640px) {
    .book-copyright { font-size: 6px; }
}

/* ============================================
   ENDORSEMENT GRID — cards sharing a row keep the same size
   (Steve Chen 陈安之 + Li RunMin 李润铭 sit next to each other)
   ============================================ */
.endorse-grid { align-items: stretch; }
.endorse-card { min-height: 100%; }

/* Legal line inside the copyright notice — 6.5px, tightly set (line-height 1) */
.book-copyright-legal {
    font-size: 6.5px;
    line-height: 1;
    display: inline-block;
}

/* ============================================
   RUDAO BOOK IDENTITY BAND (#rudao-info)
   Sits directly above "I. A New Way to Win" —
   book title (EN + CN), author byline and the
   full RuDao / TonyTong social URLs as links.
   NOT a numbered section: no chapter-band.
   ============================================ */
.ruinfo {
    position: relative;
    background: var(--paper-warm);
    padding: clamp(1.1rem, 2.2vw, 1.6rem) 0;
    border-top: 1px solid rgba(169, 50, 38, 0.16);
    border-bottom: 1px solid rgba(169, 50, 38, 0.16);
}
.ruinfo-frame {
    margin: 0;
    padding: 0.95rem 1.1rem 0.85rem;
    text-align: center;
    line-height: 1;
}
.ruinfo-title {
    font-family: var(--font-serif-en);
    font-size: 13px;
    font-weight: 600;
    line-height: 1;
    letter-spacing: 0;
    color: var(--ink-black);
    max-width: 900px;
    margin: 0 auto 4px;
}
.ruinfo-cn {
    font-family: var(--font-cn-body);
    font-size: 12px;
    line-height: 1;
    color: var(--vermillion);
    margin-bottom: 4px;
}
.ruinfo-byline {
    font-size: 11px;
    font-style: italic;
    letter-spacing: 0;
    line-height: 1;
    color: var(--ink-mid);
    margin-bottom: 8px;
}
.ruinfo-links-title {
    font-family: var(--font-sans);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    line-height: 1;
    text-transform: uppercase;
    color: var(--vermillion);
    margin-bottom: 5px;
}
.ruinfo-links {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 3px 12px;
    padding: 0;
    margin: 0;
    line-height: 1;
}
.ruinfo-links li { margin: 0; line-height: 1; }
.ruinfo-links a {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'Microsoft YaHei', sans-serif;
    font-size: 8px;
    font-style: normal;
    font-weight: 400;
    line-height: 1;
    color: var(--ink-mid);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 1px;
    text-decoration-color: rgba(169, 50, 38, 0.45);
    word-break: break-all;
    transition: color .25s ease, text-decoration-color .25s ease;
}
.ruinfo-links a:hover {
    color: var(--vermillion);
    text-decoration-color: var(--vermillion);
}
@media (max-width: 860px) {
    .ruinfo { padding: 1rem 0; }
    .ruinfo-links { gap: 3px 10px; }
}
@media (max-width: 640px) {
    .ruinfo { padding: 0.8rem 0; }
    .ruinfo-frame { padding: 0.75rem 0.6rem 0.65rem; }
    .ruinfo-title { font-size: 12px; }
    .ruinfo-cn { font-size: 11px; }
    .ruinfo-byline { font-size: 10px; }
    .ruinfo-links { flex-direction: column; gap: 3px; }
    .ruinfo-links a { font-size: 8px; }
}

/* Compact variant for quote blocks that stack several lines (Ch.5.3.2 Kuok maxims) */
.quote-block.quote-block-sm .quote {
    font-size: clamp(1.02rem, 1.5vw, 1.2rem);
    line-height: 1.45;
    margin-bottom: 0.45rem;
}
.quote-block.quote-block-sm .quote-cn {
    font-size: 1.02rem;
    line-height: 1.6;
    margin-bottom: 0.7rem;
}
.quote-block.quote-block-sm .quote-attr { margin-top: 0.2rem; }

/* ============================================
   SUN TZU'S FIVE FACTORS (五事) — monospace figure
   Courier New block inside the generic .ru-frame
   ============================================ */
.wushi-frame { padding-bottom: clamp(1.1rem, 2.2vw, 1.5rem); }
.wushi-title {
    font-family: 'Courier New', Courier, monospace;
    font-size: clamp(0.76rem, 1.05vw, 0.86rem);
    font-weight: 700;
    letter-spacing: 0.14em;
    line-height: 1.5;
    color: var(--vermillion);
    margin: 0 0 0.95rem;
}
.wushi-title span[lang="zh"] { letter-spacing: 0.08em; }
.wushi-map {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.wushi-row {
    display: grid;
    grid-template-columns: 2.6ch 27ch max-content minmax(0, 1fr);
    align-items: baseline;
    margin: 0;
    font-family: 'Courier New', Courier, monospace;
    font-size: clamp(0.7rem, 1.02vw, 0.84rem);
    line-height: 2.1;
    color: var(--ink-black);
}
.wushi-row > span { white-space: nowrap; }
.wushi-no { color: var(--gray); }
.wushi-term { font-weight: 600; letter-spacing: 0.01em; }
.wushi-arrow {
    font-family: 'Courier New', 'Segoe UI Symbol', Courier, monospace;
    color: var(--vermillion);
    padding-right: 2ch;
}
.wushi-mean { color: var(--ink-mid); }
@media (max-width: 640px) {
    .wushi-title { letter-spacing: 0.1em; }
    .wushi-row {
        font-size: 0.7rem;
        grid-template-columns: 2.6ch minmax(0, 1fr);
        row-gap: 0.1rem;
        line-height: 1.7;
        margin-bottom: 0.5rem;
    }
    .wushi-arrow { display: none; }
    .wushi-mean { grid-column: 2; white-space: normal; }
}

/* ============================================
   Chapter 6.3.2 - Digital Co-opetition cascade diagram
   ============================================ */
.coop-flow {
    max-width: 760px;
    margin: clamp(1.6rem, 3vw, 2.4rem) auto;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}
.coop-layer {
    border: 1px solid var(--paper-shadow);
    border-left: 3px solid var(--vermillion);
    background: var(--paper-warm);
    padding: 1rem 1.15rem;
    border-radius: var(--radius);
}
.coop-layer.is-mid { border-left-color: var(--gold); background: #fdfbf6; }
.coop-layer.is-base { border-left-color: var(--ink-black); }
.coop-layer-tag {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.62rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--vermillion);
    font-weight: 700;
    margin-bottom: 0.35rem;
}
.coop-layer-title {
    font-family: var(--font-body);
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--ink-black);
    line-height: 1.35;
    margin: 0 0 0.5rem;
}
.coop-layer-title span {
    display: block;
    font-family: var(--font-cn-body);
    font-size: 0.86rem;
    color: var(--gray);
    font-weight: 600;
    letter-spacing: 0.04em;
    margin-top: 0.15rem;
}
.coop-layer-list {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--ink-mid);
}
.coop-layer-list li { position: relative; padding-left: 0.95rem; margin: 0.18rem 0; }
.coop-layer-list li::before { content: "-"; position: absolute; left: 0; color: var(--gold); }
.coop-arrow {
    text-align: center;
    color: var(--gold);
    font-size: 0.9rem;
    line-height: 1;
    padding: 0.3rem 0;
}
.coop-arrow small {
    display: block;
    font-size: 0.64rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gray);
    margin-top: 0.2rem;
}
.coop-loop {
    margin-top: 0.55rem;
    text-align: center;
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    color: var(--vermillion);
    border-top: 1px dashed var(--paper-shadow);
    padding-top: 0.55rem;
}
@media (max-width: 640px) {
    .coop-layer { padding: 0.85rem 0.9rem; }
    .coop-layer-list { font-size: 0.85rem; }
    .coop-loop { letter-spacing: 0.04em; }
}

/* ============================================
   CH.6.1 - DR. ZHU JIA-MING | AUTHOR'S NOTE FRAME
   ============================================ */
.zhu-frame {
    position: relative;
    margin: 0 0 clamp(2rem, 4vw, 2.8rem);
    padding: clamp(1.4rem, 2.6vw, 2.2rem);
    background: linear-gradient(180deg, rgba(255,255,255,0.78), rgba(243,237,225,0.5));
    border: 1px solid rgba(169, 50, 38, 0.22);
    box-shadow: 0 0 0 5px rgba(169, 50, 38, 0.035), 0 14px 30px rgba(10, 10, 10, 0.05);
}
.zhu-frame::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    height: 4px;
    background: linear-gradient(90deg, var(--vermillion), var(--gold-soft));
}
.preface-body .zhu-frame-title {
    font-family: var(--font-serif-en);
    font-size: clamp(1.02rem, 1.8vw, 1.28rem);
    font-weight: 600;
    line-height: 1.4;
    color: var(--ink-black);
    margin: 0 0 1rem;
    letter-spacing: 0.01em;
    text-align: left;
}
.preface-body .zhu-frame p {
    font-size: clamp(0.94rem, 1.1vw, 1.02rem);
    line-height: 1.88;
    margin-bottom: 0.95rem;
    color: var(--ink-mid);
    text-align: justify;
    text-justify: inter-word;
}
.preface-body .zhu-frame p:last-child { margin-bottom: 0; }
.preface-body p.zhu-keywords {
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: 0.92rem;
    line-height: 1.8;
    color: var(--gray);
    border-left: 2px solid rgba(184, 146, 58, 0.45);
    padding-left: 0.9rem;
    margin-bottom: 1.8rem;
    text-align: left;
}
.preface-body ul.zhu-list {
    margin: 0 0 1.5rem;
    padding-left: 1.15rem;
    list-style: disc;
}
.preface-body ul.zhu-list li {
    font-size: clamp(0.97rem, 1.15vw, 1.04rem);
    line-height: 1.85;
    color: var(--ink-mid);
    margin-bottom: 0.45rem;
    text-align: left;
}
.preface-body ul.zhu-list li::marker { color: var(--vermillion); }
.preface-body p.zhu-closing {
    font-family: var(--font-serif-en);
    font-size: clamp(1.05rem, 1.6vw, 1.2rem);
    font-style: italic;
    color: var(--vermillion);
    text-align: center;
    margin: 1.7rem 0 0;
    line-height: 1.6;
}
@media (max-width: 640px) {
    .zhu-frame { padding: 1.1rem 1rem; }
    .preface-body .zhu-frame p { text-align: left; }
}