/* ============================================================
   般若文库 · book.css（完整修复版 v5）
   设计基调：宣纸 · 墨 · 朱砂
   覆盖：首页 index.php + 内页 book.php
   背景层次放在 body 上，Hero 透明，整页无分界线
   ============================================================ */

@layer reset, tokens, base, topbar, shelf, stage, hero, search,
        scroll, pager, related, catalog, np, sheet, about,
        misc, mq;

/* ------------------------------------------------------------
   reset
   ------------------------------------------------------------ */
@layer reset {
  *, *::before, *::after {
    margin: 0; padding: 0; box-sizing: border-box;
    word-wrap: break-word; overflow-wrap: break-word;
  }
  html, body { width: 100%; max-width: 100%; overflow-x: hidden; }
  a { text-decoration: none; color: inherit; transition: color .2s; }
  ul, ol { list-style: none; }
  img, svg, video, iframe { max-width: 100%; height: auto; display: block; }
  button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
  input, textarea { font: inherit; color: inherit; }
  html { scroll-behavior: smooth; }
}

/* ------------------------------------------------------------
   tokens
   ------------------------------------------------------------ */
@layer tokens {
  :root {
    --paper:      #14110e;
    --paper-2:    #1b1815;
    --paper-3:    #221e1a;
    --ink:        #d9d2c6;
    --ink-2:      #a49c8e;
    --ink-3:      #6f675c;
    --ink-hi:     #f3ede1;
    --line:       #2a2621;
    --line-2:     #211e1a;
    --cinnabar:   #c2603f;
    --cinnabar-2: #d47a5c;
    --cinnabar-3: rgba(194, 96, 63, .12);
    --gold:       #b9a173;
    --shadow-1:   0 1px 0 rgba(255,255,255,.02), 0 1px 2px rgba(0,0,0,.4);
    --shadow-2:   0 10px 40px -12px rgba(0,0,0,.6);
    --missing:    #d97b7b;
    --missing-bg: rgba(217,123,123,.15);

    --serif: "Noto Serif SC", "Songti SC", "SimSun", "STSong", "Times New Roman", serif;
    --sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
             "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --mono:  ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

    --measure: 960px;
    --gutter:  clamp(16px, 4vw, 48px);
  }

  html.light {
    --paper:      #f7f4ee;
    --paper-2:    #fffdf8;
    --paper-3:    #f0ece3;
    --ink:        #2a251f;
    --ink-2:      #5c554a;
    --ink-3:      #8f877a;
    --ink-hi:     #14110e;
    --line:       #e2dcd0;
    --line-2:     #ece7dc;
    --cinnabar:   #a5442a;
    --cinnabar-2: #bd5638;
    --cinnabar-3: rgba(165, 68, 42, .08);
    --gold:       #9a7f4d;
    --shadow-1:   0 1px 0 rgba(255,255,255,.6), 0 1px 2px rgba(0,0,0,.04);
    --shadow-2:   0 10px 40px -18px rgba(0,0,0,.18);
  }
}

/* ------------------------------------------------------------
   base —— 整页多层渐变（Hero 和 stage 共享）
   ------------------------------------------------------------ */
@layer base {
  html { background: var(--paper); }

  body {
    font-family: var(--serif);
    font-size: clamp(16px, 1.05vw + 13px, 18px);
    line-height: 1.95;
    color: var(--ink);
    letter-spacing: .02em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;

    /* 亮色多层渐变 */
    background:
      radial-gradient(60% 40% at 50% 0%,
        rgba(255, 253, 248, .95) 0%,
        rgba(247, 244, 238, .5) 50%,
        transparent 75%),
      radial-gradient(38% 30% at 6% 4%,
        rgba(165, 68, 42, .14) 0%, transparent 70%),
      radial-gradient(42% 32% at 94% 26%,
        rgba(154, 127, 77, .16) 0%, transparent 72%),
      radial-gradient(34% 26% at 4% 24%,
        rgba(120, 118, 110, .07) 0%, transparent 70%),
      radial-gradient(36% 28% at 96% 6%,
        rgba(255, 250, 230, .5) 0%, transparent 70%),
      linear-gradient(180deg,
        #fffdf8 0%,
        #f9f6f0 20%,
        #f7f4ee 40%,
        #f7f4ee 100%);
    background-attachment: fixed, fixed, fixed, fixed, fixed, fixed;
    transition: background .35s, color .3s;
  }

  /* 暗色多层渐变 */
  html:not(.light) body {
    background:
      radial-gradient(60% 40% at 50% 0%,
        rgba(27, 24, 21, .9) 0%,
        rgba(20, 17, 14, .4) 50%,
        transparent 75%),
      radial-gradient(38% 30% at 6% 4%,
        rgba(194, 96, 63, .16) 0%, transparent 70%),
      radial-gradient(42% 32% at 94% 26%,
        rgba(185, 161, 115, .12) 0%, transparent 72%),
      radial-gradient(34% 26% at 4% 24%,
        rgba(70, 62, 50, .14) 0%, transparent 70%),
      radial-gradient(36% 28% at 96% 6%,
        rgba(40, 34, 28, .4) 0%, transparent 70%),
      linear-gradient(180deg,
        #1b1815 0%,
        #17140f 20%,
        #14110e 40%,
        #14110e 100%);
    background-attachment: fixed, fixed, fixed, fixed, fixed, fixed;
  }

  ::selection { background: var(--cinnabar); color: #fff; }
  :where(.scroll__body, .catalog, .sheet__text) { text-wrap: pretty; }
}

/* ------------------------------------------------------------
   topbar
   ------------------------------------------------------------ */
@layer topbar {
  .topbar {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in oklab, var(--paper) 92%, transparent);
    backdrop-filter: saturate(1.2) blur(10px);
    -webkit-backdrop-filter: saturate(1.2) blur(10px);
    border-bottom: 1px solid var(--line);
  }
  .topbar__inner {
    width: 100%;
    padding: 12px var(--gutter);
    display: flex; align-items: center; justify-content: space-between;
    gap: 16px;
  }
  .brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
  .brand__seal {
    width: 38px; height: 38px; display: grid; place-items: center;
    color: #fff; background: var(--cinnabar);
    border-radius: 10px; font-size: 17px;
    box-shadow: 0 4px 14px -6px var(--cinnabar);
    flex-shrink: 0; transition: transform .3s ease;
  }
  .brand:hover .brand__seal { transform: rotate(-6deg); }
  .brand__name {
    font-size: 19px; letter-spacing: .32em;
    color: var(--ink-hi); font-weight: 600; white-space: nowrap;
  }
  .brand__sub {
    font-family: var(--mono); font-size: 10px; color: var(--ink-3);
    letter-spacing: .22em; white-space: nowrap;
    border-left: 1px solid var(--line); padding-left: 12px; margin-left: 4px;
  }
  .topbar__tools { display: flex; align-items: center; gap: 8px; }
  .icon-btn {
    width: 38px; height: 38px; display: grid; place-items: center;
    border-radius: 10px; border: 1px solid var(--line);
    background: var(--paper-2); color: var(--ink-2); font-size: 14px;
    transition: color .2s, border-color .2s, background .2s, transform .2s;
  }
  .icon-btn:hover {
    color: var(--cinnabar);
    border-color: color-mix(in oklab, var(--cinnabar) 40%, var(--line));
    background: var(--cinnabar-3);
  }
  .icon-btn:active { transform: scale(.96); }

  .lang { position: relative; }
  .lang__current {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 8px 12px;
    border: 1px solid var(--line);
    background: var(--paper-2);
    border-radius: 10px;
    color: var(--ink-2);
    font-family: var(--sans); font-size: 13px;
    transition: color .2s, border-color .2s;
  }
  .lang__current:hover {
    color: var(--ink-hi);
    border-color: color-mix(in oklab, var(--cinnabar) 40%, var(--line));
  }
  .lang__flag {
    width: 18px; height: 13px; border-radius: 2px;
    background-size: cover; background-position: center;
    flex-shrink: 0;
  }
  .lang__name { white-space: nowrap; }
  .lang__current .fa-chevron-down { font-size: 10px; color: var(--ink-3); }
  .lang__panel {
    position: absolute; top: calc(100% + 10px); right: 0;
    width: min(420px, calc(100vw - 32px));
    max-height: min(70vh, 520px);
    background: var(--paper-2);
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: var(--shadow-2);
    padding: 14px;
    overflow: hidden;
    display: flex; flex-direction: column;
    opacity: 0; visibility: hidden;
    transform: translateY(-6px);
    transition: opacity .2s, transform .2s, visibility .2s;
  }
  .lang.is-active .lang__panel,
  .lang.active .lang__panel,
  .language-selector.active .lang__panel {
    opacity: 1; visibility: visible; transform: none;
  }
  .language-regions-container {
    overflow-y: auto; flex: 1; padding-right: 4px;
    scrollbar-width: thin; scrollbar-color: var(--line) transparent;
  }
  .language-regions-container::-webkit-scrollbar { width: 6px; }
  .language-regions-container::-webkit-scrollbar-thumb {
    background: var(--line); border-radius: 3px;
  }
  .language-region + .language-region { margin-top: 14px; }
  .region-title {
    font-family: var(--sans);
    font-size: 11px; font-weight: 700;
    letter-spacing: .18em; text-transform: uppercase;
    color: var(--cinnabar);
    padding: 6px 4px 8px;
    border-bottom: 1px dashed var(--line);
    margin-bottom: 8px;
  }
  .region-languages {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 2px;
  }
  .language-option {
    display: flex; align-items: center; gap: 8px;
    padding: 7px 10px;
    border-radius: 8px;
    color: var(--ink-2);
    font-family: var(--sans); font-size: 13px;
    cursor: pointer;
    transition: background .15s, color .15s;
  }
  .language-option:hover { background: var(--paper-3); color: var(--ink-hi); }
  .language-option.active {
    background: var(--cinnabar-3);
    color: var(--cinnabar);
    font-weight: 600;
  }
  .language-option .language-flag {
    width: 16px; height: 12px; border-radius: 2px;
    background-size: cover; background-position: center;
    flex-shrink: 0;
  }
  .language-option span {
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  }

  .m-lang {
    position: fixed; inset: 0; z-index: 200;
    display: none; align-items: flex-end;
    background: rgba(0,0,0,.5);
    backdrop-filter: blur(2px);
  }
  .m-lang.is-active, .m-lang.active { display: flex; }
  .m-lang__sheet {
    width: 100%;
    max-height: 78vh;
    background: var(--paper-2);
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
    border-top: 1px solid var(--line);
    display: flex; flex-direction: column;
    overflow: hidden;
    animation: sheetUp .28s ease;
  }
  @keyframes sheetUp {
    from { transform: translateY(100%); }
    to   { transform: translateY(0); }
  }
  .m-lang__head {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--line);
  }
  .m-lang__head h3 {
    font-size: 15px; letter-spacing: .14em;
    font-family: var(--sans);
    color: var(--ink-hi);
  }
  .m-lang__list { overflow-y: auto; padding: 8px 16px 24px; }
  .mobile-language-option {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 8px;
    border-bottom: 1px solid var(--line-2);
    cursor: pointer;
    transition: background .15s;
  }
  .mobile-language-option:last-child { border-bottom: 0; }
  .mobile-language-option:hover { background: var(--paper-3); }
  .mobile-language-option.active { color: var(--cinnabar); }
  .mobile-language-flag {
    width: 22px; height: 16px; border-radius: 2px;
    background-size: cover; background-position: center;
    flex-shrink: 0;
  }
  .mobile-language-name { font-family: var(--sans); font-size: 14px; }
}

/* ------------------------------------------------------------
   shelf
   ------------------------------------------------------------ */
@layer shelf {
  .shelf {
    position: sticky; top: 63px; z-index: 40;
    background: color-mix(in oklab, var(--paper) 94%, transparent);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
  }
  .shelf__inner {
    width: 100%;
    padding: 10px var(--gutter);
    display: flex; align-items: center; gap: 10px;
    min-width: 0;
  }
  .shelf__track {
    flex: 1 1 auto; min-width: 0;
    display: flex; flex-wrap: wrap;
    justify-content: flex-start; align-items: center;
    gap: 6px 8px;
    overflow: visible;
  }
  .shelf__item {
    flex: 0 0 auto;
    padding: 8px 14px;
    border-radius: 999px;
    font-family: var(--sans); font-size: 13.5px;
    color: var(--ink-2);
    border: 1px solid transparent;
    white-space: nowrap; text-align: center;
    transition: color .2s, background .2s, border-color .2s;
  }
  .shelf__item:hover { color: var(--ink-hi); background: var(--paper-3); }
  .shelf__item.is-active {
    color: var(--cinnabar);
    background: var(--cinnabar-3);
    border-color: color-mix(in oklab, var(--cinnabar) 30%, transparent);
    font-weight: 600;
  }
  .shelf__nav {
    display: none; flex-shrink: 0;
    width: 32px; height: 32px;
    place-items: center;
    border-radius: 8px;
    border: 1px solid var(--line);
    background: var(--paper-2);
    color: var(--ink-2); font-size: 12px;
    transition: color .2s, border-color .2s, background .2s, opacity .2s;
  }
  .shelf__nav:hover {
    color: var(--cinnabar);
    border-color: color-mix(in oklab, var(--cinnabar) 40%, var(--line));
    background: var(--cinnabar-3);
  }
  .shelf__nav.is-off { opacity: .3; pointer-events: none; }
}

/* ------------------------------------------------------------
   stage
   ------------------------------------------------------------ */
@layer stage {
  .stage {
    max-width: var(--measure);
    margin: 0 auto;
    padding: clamp(32px, 6vw, 72px) var(--gutter) 110px;
  }
  .crumbs {
    display: flex; align-items: center; gap: 10px;
    font-family: var(--sans); font-size: 12.5px;
    letter-spacing: .08em;
    color: var(--ink-3);
    margin-bottom: clamp(24px, 4vw, 40px);
  }
  .crumbs a { color: var(--ink-2); }
  .crumbs a:hover { color: var(--cinnabar); }
  .crumbs span { color: var(--ink-3); opacity: .6; }
  .blank {
    text-align: center; padding: 120px 20px;
    color: var(--ink-3); font-family: var(--sans);
  }
  .blank i {
    font-size: 48px; color: var(--line);
    margin-bottom: 20px; display: block;
  }
  .blank p { font-size: 15px; margin-bottom: 14px; }
  .blank a {
    color: var(--cinnabar);
    border-bottom: 1px solid currentColor;
    padding-bottom: 2px;
  }
}

/* ------------------------------------------------------------
   hero —— 透明背景，只作内容层
   ------------------------------------------------------------ */
@layer hero {
  .hero {
    position: relative;
    width: 100%;
    margin: 0;
    padding: clamp(72px, 10vw, 140px) 0 clamp(40px, 6vw, 72px);
    overflow: hidden;
    isolation: isolate;
    text-align: center;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }

  /* 网格纹理（局部装饰） */
  .hero::before {
    content: "";
    position: absolute; inset: 0;
    pointer-events: none;
    background-image:
      linear-gradient(to right, color-mix(in oklab, var(--line) 55%, transparent) 1px, transparent 1px),
      linear-gradient(to bottom, color-mix(in oklab, var(--line) 55%, transparent) 1px, transparent 1px);
    background-size: 56px 56px;
    opacity: .16;
    mask-image: radial-gradient(75% 75% at 50% 45%, black 0%, transparent 92%);
    -webkit-mask-image: radial-gradient(75% 75% at 50% 45%, black 0%, transparent 92%);
    z-index: 0;
  }

  .hero__inner {
    position: relative;
    z-index: 3;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 clamp(16px, 4vw, 48px);
  }

  .hero__deco {
    position: absolute; inset: 0;
    z-index: 2; pointer-events: none; overflow: hidden;
  }

  .hero__icon {
    position: absolute;
    color: var(--cinnabar);
    opacity: .10;
    font-size: 28px; line-height: 1;
    will-change: transform, opacity;
  }

  .hero__icon--1 { top: 12%; left:  6%;  font-size: 52px; animation: floaty 14s ease-in-out infinite; }
  .hero__icon--2 { top: 12%; right: 6%;  font-size: 40px; animation: floaty 18s ease-in-out infinite reverse; color: var(--gold); }
  .hero__icon--3 { top: 80%; left:  6%;  font-size: 38px; animation: spinSlow 40s linear infinite; }
  .hero__icon--4 { top: 80%; right: 6%;  font-size: 46px; animation: floaty 22s ease-in-out infinite; }
  .hero__icon--5 { top:  8%; left: 50%; transform: translateX(-50%); font-size: 30px; animation: floatyMid 16s ease-in-out infinite; color: var(--gold); }
  .hero__icon--6 { top: 86%; left: 50%; transform: translateX(-50%); font-size: 30px; animation: pulseMid 6s ease-in-out infinite; }
  .hero__icon--7 { top: 50%; left:  4%;  transform: translateY(-50%); font-size: 26px; animation: spinMid 60s linear infinite reverse; }
  .hero__icon--8 { top: 50%; right: 4%;  transform: translateY(-50%); font-size: 24px; animation: floatyMidR 20s ease-in-out infinite reverse; color: var(--gold); }

  html.light .hero__icon { opacity: .14; color: var(--cinnabar); }
  html.light .hero__icon--2,
  html.light .hero__icon--5,
  html.light .hero__icon--8 { color: var(--gold); opacity: .18; }

  html:not(.light) .hero__icon { opacity: .09; }
  html:not(.light) .hero__icon--2,
  html:not(.light) .hero__icon--5,
  html:not(.light) .hero__icon--8 { opacity: .12; }

  @keyframes floaty {
    0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg); }
    50%      { transform: translate3d(0, -14px, 0) rotate(3deg); }
  }
  @keyframes floatyMid {
    0%, 100% { transform: translateX(-50%) translateY(0)    rotate(0deg); }
    50%      { transform: translateX(-50%) translateY(-12px) rotate(3deg); }
  }
  @keyframes floatyMidR {
    0%, 100% { transform: translateY(-50%) translateX(0)    rotate(0deg); }
    50%      { transform: translateY(-50%) translateX(-6px) rotate(-3deg); }
  }
  @keyframes pulseMid {
    0%, 100% { transform: translateX(-50%) scale(1);    opacity: .07; }
    50%      { transform: translateX(-50%) scale(1.15); opacity: .16; }
  }
  @keyframes spinSlow {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
  }
  @keyframes spinMid {
    from { transform: translateY(-50%) rotate(0deg); }
    to   { transform: translateY(-50%) rotate(360deg); }
  }

  .hero__eyebrow {
    font-family: var(--sans);
    font-size: 12px; letter-spacing: .42em;
    color: var(--cinnabar); text-indent: .42em;
    text-transform: uppercase; margin-bottom: 20px;
  }
  .hero__title {
    font-size: clamp(30px, 4vw + 12px, 46px);
    font-weight: 700; line-height: 1.3;
    letter-spacing: .22em; text-indent: .22em;
    color: var(--ink-hi); margin-bottom: 22px;
  }
  .hero__rule {
    display: flex; align-items: center; justify-content: center;
    gap: 14px; color: var(--gold);
    margin-bottom: 26px;
  }
  .hero__rule span {
    height: 1px; width: clamp(40px, 12vw, 96px);
    background: linear-gradient(to right, transparent, var(--line), transparent);
  }
  .hero__rule i { font-size: 30px; opacity: .9; }
  .hero__desc {
    max-width: 680px; margin: 0 auto;
    font-size: clamp(14px, .6vw + 12px, 15.5px);
    line-height: 2; color: var(--ink-2);
    letter-spacing: .04em;
    text-align: justify; text-justify: inter-ideograph;
  }

  @media (prefers-reduced-motion: reduce) {
    .hero__icon { animation: none !important; }
  }
}

/* ------------------------------------------------------------
   search
   ------------------------------------------------------------ */
@layer search {
  .search {
    display: flex; align-items: stretch; gap: 8px;
    max-width: 640px;
    margin: 0 auto clamp(40px, 6vw, 64px);
    padding: 6px;
    background: var(--paper-2);
    border: 1px solid var(--line);
    border-radius: 12px;
    transition: border-color .25s, box-shadow .25s;
  }
  .search:focus-within {
    border-color: color-mix(in oklab, var(--cinnabar) 50%, var(--line));
    box-shadow: 0 0 0 3px var(--cinnabar-3);
  }
  .search__input {
    flex: 1; min-width: 0;
    padding: 12px 16px;
    background: transparent; border: none; outline: none;
    color: var(--ink);
    font-family: var(--sans); font-size: 15px;
  }
  .search__input::placeholder { color: var(--ink-3); }
  .search__btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 0 22px;
    background: var(--cinnabar); color: #fff;
    border-radius: 9px;
    font-family: var(--sans); font-size: 14px; font-weight: 600;
    letter-spacing: .06em;
    transition: background .2s;
  }
  .search__btn:hover { background: var(--cinnabar-2); }
  .search__btn i { font-size: 13px; }
}

/* ------------------------------------------------------------
   scroll
   ------------------------------------------------------------ */
@layer scroll {
  .scroll__head { text-align: center; margin-bottom: clamp(28px, 5vw, 48px); }
  .scroll__eyebrow {
    font-family: var(--sans); font-size: 12px;
    letter-spacing: .38em; color: var(--cinnabar);
    text-indent: .38em; margin-bottom: 16px;
    text-transform: uppercase;
  }
  .scroll__title {
    font-size: clamp(24px, 3.4vw + 10px, 36px);
    font-weight: 700; line-height: 1.35;
    letter-spacing: .12em; color: var(--ink-hi);
    text-indent: .12em; margin-bottom: 22px;
    word-break: break-word;
  }
  .scroll__rule {
    display: flex; align-items: center; justify-content: center;
    gap: 14px; color: var(--gold);
  }
  .scroll__rule span {
    height: 1px; width: clamp(40px, 12vw, 96px);
    background: linear-gradient(to right, transparent, var(--line), transparent);
  }
  .scroll__rule i { font-size: 22px; opacity: .85; }
  .scroll__cover {
    margin: 0 auto clamp(28px, 5vw, 44px);
    max-width: 420px;
    border-radius: 12px; overflow: hidden;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-2);
  }
  .scroll__body {
    font-size: clamp(17px, 1vw + 14.5px, 19.5px);
    line-height: 2.1;
    color: var(--ink);
    text-align: justify; text-justify: inter-ideograph;
    -webkit-text-size-adjust: 100%;
  }
  .scroll__body > * + * { margin-top: 1.05em; }
  .scroll__body p {
    text-indent: 2em;
    text-align: justify; text-justify: inter-ideograph;
    letter-spacing: .02em;
    word-break: break-word;
  }
  .scroll__body h1 {
    text-align: center; text-indent: 0;
    font-size: 1.35em; font-weight: 700;
    letter-spacing: .12em; color: var(--ink-hi);
    margin: 2.2em 0 1.2em;
  }
  .scroll__body h1:first-child { margin-top: 0; }
  .scroll__body h2 {
    text-align: left; text-indent: 0;
    font-size: 1.15em; font-weight: 700;
    color: var(--ink-hi); letter-spacing: .08em;
    margin: 1.8em 0 .9em;
    padding-left: 14px;
    border-left: 3px solid var(--cinnabar);
  }
  .scroll__body h3 {
    text-align: left; text-indent: 0;
    font-size: 1.05em; font-weight: 700;
    color: var(--ink-hi);
    margin: 1.6em 0 .7em;
  }
  .scroll__body blockquote {
    text-align: left; text-indent: 0;
    padding: 4px 0 4px 20px;
    border-left: 2px solid var(--line);
    color: var(--ink-2); font-style: italic;
  }
  .scroll__body .note {
    text-align: left; text-indent: 0;
    background: var(--paper-3);
    border-left: 3px solid var(--gold);
    border-radius: 0 8px 8px 0;
    padding: 16px 20px;
    color: var(--ink-2);
    font-size: .92em;
    font-family: var(--sans);
  }
  .scroll__body .note p { text-indent: 0; text-align: left; }
  .scroll__body .missing-char {
    color: var(--missing);
    background: var(--missing-bg);
    padding: 0 4px; border-radius: 3px;
  }
  .scroll__body a {
    color: var(--cinnabar);
    border-bottom: 1px dotted currentColor;
  }
  .scroll__body a:hover {
    color: var(--cinnabar-2);
    border-bottom-style: solid;
  }
  .scroll__body em, .scroll__body i { font-style: italic; }
  .scroll__body strong { color: var(--ink-hi); }
  .scroll__body .simple-tts-active,
  .simple-tts-active {
    background: var(--cinnabar-3) !important;
    box-shadow: inset 0 -2px 0 var(--cinnabar);
    border-radius: 3px;
    transition: background .3s, box-shadow .3s;
  }
  .scroll__tools {
    margin-top: clamp(36px, 6vw, 56px);
    display: flex; justify-content: center;
    gap: 10px; flex-wrap: wrap;
    padding-top: 28px;
    border-top: 1px solid var(--line);
  }
  .ghost-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 18px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--paper-2);
    color: var(--ink-2);
    font-family: var(--sans); font-size: 13.5px;
    letter-spacing: .02em;
    transition: color .2s, border-color .2s, background .2s, transform .15s;
  }
  .ghost-btn i { color: var(--cinnabar); font-size: 13px; }
  .ghost-btn:hover {
    color: var(--ink-hi);
    border-color: color-mix(in oklab, var(--cinnabar) 40%, var(--line));
    background: var(--cinnabar-3);
  }
  .ghost-btn:active { transform: translateY(1px); }
  .solid-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 22px;
    border-radius: 10px;
    background: var(--cinnabar); color: #fff;
    font-family: var(--sans); font-size: 13.5px; font-weight: 600;
    letter-spacing: .06em;
    transition: background .2s, transform .15s, opacity .2s;
  }
  .solid-btn:hover { background: var(--cinnabar-2); }
  .solid-btn:active { transform: translateY(1px); }
  .solid-btn:disabled { opacity: .55; cursor: not-allowed; }

  .simple-tts-bar {
    display: flex; flex-wrap: wrap;
    align-items: center; justify-content: center;
    gap: 12px 20px;
    padding: 14px 18px;
    margin: 0 0 28px !important;
    background: var(--paper-3);
    border: 1px solid var(--line);
    border-radius: 12px;
  }
  .simple-tts-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 4px;
    color: var(--ink-2);
    font-family: var(--sans); font-size: 13.5px;
    letter-spacing: .04em;
    transition: color .2s;
  }
  .simple-tts-btn:hover { color: var(--cinnabar); }
  .simple-tts-btn[data-action="play"] { color: var(--cinnabar); }
  .simple-tts-speed {
    display: inline-flex; align-items: center; gap: 8px;
    color: var(--ink-3);
    font-family: var(--sans); font-size: 12.5px;
  }
  .simple-tts-speed i { color: var(--cinnabar); }
  .simple-tts-speed input[type="range"] {
    width: 96px; height: 3px;
    accent-color: var(--cinnabar);
    cursor: pointer;
  }
  .simple-tts-speed span {
    min-width: 38px; text-align: right;
    color: var(--ink-2);
    font-variant-numeric: tabular-nums;
  }
}

/* ------------------------------------------------------------
   pager / related / catalog / np / sheet / about / misc
   ------------------------------------------------------------ */
@layer pager {
  .pager {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: clamp(48px, 8vw, 80px);
    padding-top: 28px;
    border-top: 1px solid var(--line);
  }
  .pager__item {
    display: flex; flex-direction: column; gap: 6px;
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--paper-2);
    min-width: 0;
    transition: border-color .2s, background .2s, transform .15s;
  }
  .pager__item:hover {
    border-color: color-mix(in oklab, var(--cinnabar) 40%, var(--line));
    background: var(--cinnabar-3);
    transform: translateY(-1px);
  }
  .pager__item--next { text-align: right; }
  .pager__item--empty { border: none; background: transparent; pointer-events: none; }
  .pager__dir {
    font-family: var(--sans); font-size: 11.5px;
    letter-spacing: .22em; color: var(--cinnabar);
    text-transform: uppercase;
  }
  .pager__title {
    font-size: 15.5px; color: var(--ink);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .pager__item:hover .pager__title { color: var(--ink-hi); }
}

@layer related {
  .related {
    margin-top: clamp(48px, 8vw, 80px);
    padding-top: 28px;
    border-top: 1px solid var(--line);
  }
  .related__title {
    font-size: 14px; font-family: var(--sans);
    font-weight: 600; letter-spacing: .22em;
    color: var(--ink-3); text-transform: uppercase;
    margin-bottom: 20px;
    display: flex; align-items: center; gap: 10px;
  }
  .related__title i { color: var(--cinnabar); }
  .related__list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 0 24px;
  }
  .related__list li { border-bottom: 1px dashed var(--line); }
  .related__list a {
    display: block;
    padding: 12px 0 12px 16px;
    position: relative;
    font-size: 15px; color: var(--ink-2);
    line-height: 1.55;
    transition: color .2s, padding-left .2s;
    overflow: hidden; text-overflow: ellipsis;
    white-space: nowrap;
  }
  .related__list a::before {
    content: "○";
    position: absolute; left: 0; top: 50%;
    transform: translateY(-50%);
    color: var(--gold); font-size: 10px;
    transition: color .2s;
  }
  .related__list a:hover { color: var(--ink-hi); padding-left: 20px; }
  .related__list a:hover::before { color: var(--cinnabar); }
}

@layer catalog {
  .catalog__head {
    text-align: center;
    margin-bottom: clamp(32px, 5vw, 52px);
  }
  .catalog__head h1 {
    font-size: clamp(24px, 3vw + 10px, 34px);
    font-weight: 700; letter-spacing: .16em;
    text-indent: .16em; color: var(--ink-hi);
    margin-bottom: 18px; word-break: break-word;
  }
  .catalog__meta {
    display: flex; justify-content: center; flex-wrap: wrap;
    gap: 10px 22px;
    font-family: var(--sans); font-size: 13px;
    color: var(--ink-3); letter-spacing: .06em;
  }
  .catalog__meta i { color: var(--cinnabar); margin-right: 5px; }
  .catalog { counter-reset: book var(--start, 0); }
  .catalog__item { border-bottom: 1px solid var(--line-2); }
  .catalog__item:first-child { border-top: 1px solid var(--line-2); }
  .catalog__item a {
    display: flex; align-items: baseline;
    gap: 18px; padding: 16px 12px;
    position: relative;
    transition: background .18s, padding-left .18s;
  }
  .catalog__item a::before {
    counter-increment: book;
    content: counter(book, decimal-leading-zero);
    font-family: var(--mono); font-size: 12px;
    color: var(--ink-3); min-width: 32px; flex-shrink: 0;
    padding-top: 3px; transition: color .2s;
  }
  .catalog__item a::after {
    content: "";
    position: absolute; left: 0; top: 0; bottom: 0;
    width: 2px; background: var(--cinnabar);
    opacity: 0; transition: opacity .2s;
  }
  .catalog__item a:hover { background: var(--paper-3); padding-left: 20px; }
  .catalog__item a:hover::before { color: var(--cinnabar); }
  .catalog__item a:hover::after { opacity: 1; }
  .catalog__title {
    font-size: 17px; line-height: 1.6;
    color: var(--ink);
    overflow: hidden; text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    word-break: break-word;
  }
  .catalog__item a:hover .catalog__title { color: var(--ink-hi); }
  .catalog__meta-inline {
    flex-shrink: 0;
    font-family: var(--sans); font-size: 12px;
    color: var(--ink-3); letter-spacing: .06em;
    padding-top: 4px; white-space: nowrap;
  }
}

@layer np {
  .np {
    display: flex; align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-top: clamp(40px, 6vw, 64px);
    flex-wrap: wrap;
  }
  .np__btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 9px 16px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--paper-2);
    color: var(--ink-2);
    font-family: var(--sans); font-size: 13px;
    transition: color .2s, border-color .2s, background .2s;
  }
  .np__btn:hover {
    color: var(--ink-hi);
    border-color: color-mix(in oklab, var(--cinnabar) 40%, var(--line));
    background: var(--cinnabar-3);
  }
  .np__btn.is-off { opacity: .4; pointer-events: none; }
  .np__nums {
    display: flex; align-items: center;
    gap: 4px; flex-wrap: wrap;
    justify-content: center;
  }
  .np__num {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 34px; height: 34px;
    padding: 0 10px;
    border-radius: 8px;
    font-family: var(--sans); font-size: 13px;
    color: var(--ink-2);
    font-variant-numeric: tabular-nums;
    transition: color .2s, background .2s;
  }
  .np__num:hover { color: var(--ink-hi); background: var(--paper-3); }
  .np__num.is-active { color: #fff; background: var(--cinnabar); font-weight: 600; }
  .np__gap {
    padding: 0 6px;
    color: var(--ink-3);
    font-family: var(--sans); font-size: 13px;
  }
}

@layer sheet {
  .sheet {
    position: fixed; inset: 0; z-index: 300;
    display: none; align-items: center; justify-content: center;
    padding: 16px;
    background: rgba(0,0,0,.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
  }
  .sheet.is-active, .sheet.active { display: flex; }
  .sheet__box {
    width: 100%; max-width: 760px; max-height: 92vh;
    background: var(--paper-2);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow-2);
    display: flex; flex-direction: column;
    overflow: hidden;
  }
  .sheet__head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid var(--line);
  }
  .sheet__head h3 { font-size: 15px; letter-spacing: .14em; color: var(--ink-hi); }
  .sheet__body {
    padding: 22px; overflow-y: auto;
    display: flex; flex-direction: column; gap: 12px;
  }
  .sheet__hint {
    font-family: var(--sans); font-size: 13px;
    color: var(--ink-2); line-height: 1.75;
  }
  .ink-missing {
    color: var(--missing);
    background: var(--missing-bg);
    padding: 0 5px; border-radius: 3px;
  }
  .sheet__text {
    width: 100%; min-height: 300px;
    padding: 16px 18px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 10px;
    font-family: var(--serif); font-size: 15.5px; line-height: 1.9;
    color: var(--ink);
    resize: vertical; outline: none;
    transition: border-color .2s, box-shadow .2s;
  }
  .sheet__text:focus {
    border-color: var(--cinnabar);
    box-shadow: 0 0 0 3px var(--cinnabar-3);
  }
  .sheet__input {
    width: 100%; padding: 11px 14px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 10px;
    font-family: var(--sans); font-size: 13.5px;
    color: var(--ink);
    outline: none;
    transition: border-color .2s, box-shadow .2s;
  }
  .sheet__input:focus {
    border-color: var(--cinnabar);
    box-shadow: 0 0 0 3px var(--cinnabar-3);
  }
  .sheet__foot {
    display: flex; justify-content: flex-end;
    gap: 10px; padding: 16px 22px;
    border-top: 1px solid var(--line);
  }
}

@layer about {
  .about {
    padding: clamp(28px, 4vw, 44px) clamp(22px, 3vw, 36px);
    background: var(--paper-2);
    border: 1px solid var(--line);
    border-radius: 14px;
    text-align: justify; text-justify: inter-ideograph;
  }
  .about__title {
    font-size: 18px; font-weight: 700;
    letter-spacing: .18em; color: var(--ink-hi);
    display: inline-flex; align-items: center; gap: 10px;
    margin-bottom: 20px;
  }
  .about__title i { color: var(--cinnabar); font-size: 15px; }
  .about p {
    font-size: clamp(14.5px, .6vw + 12.5px, 16px);
    line-height: 2.05;
    color: var(--ink-2);
    letter-spacing: .02em;
  }
  .about p + p { margin-top: 1em; }
  .about p strong { color: var(--ink-hi); font-weight: 600; }
}

@layer misc {
  .block { margin-bottom: clamp(48px, 7vw, 80px); }
  .block__head {
    display: flex; align-items: baseline; justify-content: space-between;
    gap: 16px; flex-wrap: wrap;
    margin-bottom: 24px; padding-bottom: 14px;
    border-bottom: 1px solid var(--line);
  }
  .block__title {
    font-size: 18px; font-weight: 700;
    letter-spacing: .18em; color: var(--ink-hi);
    display: inline-flex; align-items: center; gap: 10px;
  }
  .block__title i { color: var(--cinnabar); font-size: 15px; }
  .block__more {
    font-family: var(--sans); font-size: 12.5px;
    color: var(--ink-3); letter-spacing: .06em;
    display: inline-flex; align-items: center; gap: 6px;
    transition: color .2s;
  }
  .block__more:hover { color: var(--cinnabar); }
  .cats { display: flex; flex-wrap: wrap; gap: 8px; }
  .cats__item {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 9px 18px;
    background: var(--paper-2);
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--ink-2);
    font-family: var(--sans); font-size: 13.5px;
    white-space: nowrap;
    transition: color .2s, background .2s, border-color .2s, transform .15s;
  }
  .cats__item i { color: var(--cinnabar); font-size: 12px; }
  .cats__item:hover {
    color: var(--ink-hi);
    background: var(--cinnabar-3);
    border-color: color-mix(in oklab, var(--cinnabar) 40%, var(--line));
    transform: translateY(-1px);
  }
  .cats__count {
    font-family: var(--mono); font-size: 11px;
    color: var(--ink-3); margin-left: 4px;
  }
  .grid-2 {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 0 48px;
  }
  .foot {
    margin-top: clamp(60px, 10vw, 120px);
    padding: 40px 0 32px;
    border-top: 1px solid var(--line);
    background: var(--paper-2);
  }
  .foot__inner {
    width: 100%; margin: 0 auto;
    padding: 0 var(--gutter);
    text-align: center;
  }
  .foot__nav {
    display: flex; justify-content: center; flex-wrap: wrap;
    gap: 8px 26px; margin-bottom: 18px;
  }
  .foot__nav a {
    font-family: var(--sans); font-size: 13px;
    color: var(--ink-3);
    display: inline-flex; align-items: center; gap: 6px;
    letter-spacing: .04em; transition: color .2s;
  }
  .foot__nav a i { color: var(--cinnabar); font-size: 12px; }
  .foot__nav a:hover { color: var(--cinnabar); }
  .foot__copy {
    font-family: var(--mono); font-size: 11px;
    color: var(--ink-3); letter-spacing: .1em;
  }
  .to-top {
    position: fixed; right: 22px; bottom: 24px;
    width: 44px; height: 44px;
    display: grid; place-items: center;
    border-radius: 12px;
    background: var(--paper-2);
    border: 1px solid var(--line);
    color: var(--ink-2); font-size: 15px;
    box-shadow: var(--shadow-1);
    z-index: 90; opacity: 0; visibility: hidden;
    transform: translateY(10px);
    transition: opacity .25s, transform .25s, visibility .25s,
                color .2s, background .2s, border-color .2s;
  }
  .to-top.is-show { opacity: 1; visibility: visible; transform: none; }
  .to-top:hover {
    color: #fff;
    background: var(--cinnabar);
    border-color: var(--cinnabar);
  }
}

/* ------------------------------------------------------------
   mq
   ------------------------------------------------------------ */
@layer mq {
  @media (max-width: 900px) {
    .brand__sub { display: none; }
    .grid-2 { grid-template-columns: 1fr; gap: 40px; }

    .shelf__inner { padding: 8px 4px; gap: 8px; }
    .shelf__track {
      flex-wrap: nowrap;
      justify-content: flex-start;
      overflow-x: auto;
      padding: 0 2px; gap: 4px;
    }
    .shelf__item { flex: 0 0 auto; padding: 7px 12px; font-size: 13px; }
    .shelf__nav { display: grid; }
    .shelf__nav--prev { margin-left: 0; }
    .shelf__nav--next { margin-right: 0; }
  }

  @media (max-width: 640px) {
    :root { --gutter: 14px; }

    .topbar__inner { padding: 10px var(--gutter); }
    .brand__seal { width: 34px; height: 34px; border-radius: 9px; font-size: 15px; }
    .brand__name { font-size: 17px; letter-spacing: .28em; }
    .icon-btn { width: 34px; height: 34px; }
    .lang__name { display: none; }
    .lang__current { padding: 7px 9px; }

    .shelf { top: 55px; }
    .shelf__inner { padding: 8px 6px; gap: 8px; }
    .shelf__track { padding: 0 2px; gap: 4px; }
    .shelf__item { padding: 7px 12px; font-size: 13px; }
    .shelf__nav { width: 30px; height: 30px; font-size: 11px; }

    .stage { padding-top: 24px; padding-bottom: 64px; }
    .crumbs { margin-bottom: 20px; font-size: 12px; }

    .hero { padding: 56px 0 40px; }
    .hero__title { letter-spacing: .16em; text-indent: .16em; }
    .hero__desc { line-height: 1.95; }

    .hero__icon { font-size: 22px !important; opacity: .06 !important; }
    .hero__icon--1 { font-size: 30px !important; }
    .hero__icon--3,
    .hero__icon--5,
    .hero__icon--7 { display: none; }

    .search { border-radius: 10px; }
    .search__input { font-size: 14px; padding: 10px 12px; }
    .search__btn { padding: 0 16px; font-size: 13px; }
    .search__btn span { display: none; }

    .block { margin-bottom: 48px; }
    .block__title { font-size: 16px; letter-spacing: .14em; }
    .cats__item { padding: 8px 14px; font-size: 13px; }

    .scroll__eyebrow { font-size: 11px; letter-spacing: .32em; margin-bottom: 12px; }
    .scroll__title { letter-spacing: .1em; margin-bottom: 16px; }
    .scroll__body {
      font-size: 17px; line-height: 2.05;
      text-align: justify; text-justify: inter-ideograph;
    }
    .scroll__body p {
      text-indent: 1.8em;
      text-align: justify; text-justify: inter-ideograph;
    }
    .scroll__body h1 { font-size: 1.25em; }
    .scroll__body h2 { font-size: 1.1em; }

    .scroll__tools { flex-direction: column; align-items: stretch; }
    .ghost-btn { justify-content: center; }

    .pager { grid-template-columns: 1fr; gap: 10px; }
    .pager__item--next { text-align: left; }
    .pager__item--empty { display: none; }

    .related__list { grid-template-columns: 1fr; }
    .related__list a {
      white-space: normal; line-height: 1.55;
    }

    .catalog__item a { padding: 13px 8px; gap: 12px; }
    .catalog__item a:hover { padding-left: 14px; }
    .catalog__item a::before { font-size: 11px; min-width: 26px; }
    .catalog__title { font-size: 15.5px; }
    .catalog__meta-inline { display: none; }

    .np { gap: 10px; }
    .np__btn { padding: 8px 12px; font-size: 12.5px; }
    .np__num { min-width: 30px; height: 30px; padding: 0 8px; font-size: 12.5px; }

    .sheet { padding: 0; align-items: flex-end; }
    .sheet__box {
      max-width: 100%; max-height: 92vh;
      border-radius: 18px 18px 0 0;
    }
    .sheet__text { min-height: 200px; font-size: 15px; }
    .sheet__head, .sheet__body, .sheet__foot {
      padding-left: 18px; padding-right: 18px;
    }

    .about { padding: 24px 20px; }
    .about__title { font-size: 16px; }

    .foot { margin-top: 48px; padding: 30px 0 24px; }
    .foot__nav { gap: 8px 16px; }
    .foot__nav a { font-size: 12.5px; }

    .to-top { right: 14px; bottom: 16px; width: 40px; height: 40px; }

    .simple-tts-bar { padding: 12px 14px; gap: 10px 14px; }
    .simple-tts-btn { font-size: 13px; }
    .simple-tts-speed input[type="range"] { width: 70px; }
  }

  @media (max-width: 380px) {
    .brand__name { letter-spacing: .22em; font-size: 16px; }
    .catalog__title { font-size: 14.5px; }
    .np__gap { display: none; }
  }
}

/* 兼容老 JS 使用的 class */
.language-selector.active .language-dropdown { opacity: 1; visibility: visible; transform: none; }
.mobile-language-modal.active { display: flex; }
.correct-modal.active { display: flex; }
.back-to-top.show { opacity: 1; visibility: visible; transform: none; }