/* =========================================================
   /assets/site.css — 皇冠真人娱乐 中文站 共享外壳
   设计基调：剧场后台 × 档案库｜深红 · 鎏金 · 曜石黑 · 珍珠白
   ========================================================= */

/* ---------- 设计令牌 ---------- */
:root {
  --crimson: #7A0E1E;
  --crimson-light: #8F1426;
  --crimson-deep: #4A0712;
  --gold: #C9A227;
  --gold-light: #E8D9A8;
  --obsidian: #120D0F;
  --obsidian-soft: #1C1416;
  --pearl: #F7F3EE;
  --pearl-deep: #EDE6DE;
  --jade: #2F8F83;
  --warm-gray: #6E6468;
  --hairline: #E4DED8;
  --success: #3E7D5A;

  --ink: #1A1214;
  --ink-soft: #4A4044;
  --line-gold: rgba(201, 162, 39, 0.42);
  --line-light: rgba(232, 217, 168, 0.2);

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --shell-w: 1180px;
  --gutter: 24px;
  --gap: 24px;
  --radius: 2px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-card: 0 1px 2px rgba(18, 13, 15, 0.05), 0 12px 30px -22px rgba(18, 13, 15, 0.45);
  --shadow-lift: 0 2px 4px rgba(18, 13, 15, 0.06), 0 22px 44px -26px rgba(74, 7, 18, 0.6);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd, fieldset {
  margin: 0;
}

ul, ol { padding: 0; }
ul[class], ol[class] { list-style: none; }

img, svg, video {
  display: block;
  max-width: 100%;
}

button { font: inherit; color: inherit; }

a { color: inherit; }

[hidden] { display: none !important; }

/* ---------- 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--pearl);
  background-image:
    radial-gradient(90rem 40rem at 8% -10%, rgba(122, 14, 30, 0.06) 0%, rgba(247, 243, 238, 0) 60%),
    radial-gradient(70rem 34rem at 108% 4%, rgba(201, 162, 39, 0.08) 0%, rgba(247, 243, 238, 0) 62%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: 0.02em;
  color: var(--ink);
}

h1 { font-size: clamp(2rem, 4.2vw, 3.1rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); }
h3 { font-size: clamp(1.1rem, 1.8vw, 1.35rem); font-weight: 700; }

p { margin: 0; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 通用工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.is-hidden { display: none !important; }

.skip-link {
  position: fixed;
  top: -72px;
  left: 16px;
  z-index: 200;
  padding: 11px 20px;
  background: var(--gold);
  color: #3A2405;
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: 0 10px 24px -12px rgba(18, 13, 15, 0.7);
  transition: top 0.2s var(--ease);
}

.skip-link:focus { top: 0; }

/* =========================================================
   页头
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  color: var(--pearl);
  background: var(--crimson);
  box-shadow: 0 12px 34px -26px rgba(18, 13, 15, 0.9);
}

.site-header__progress {
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-light) 62%, #FFFFFF 100%);
  pointer-events: none;
  z-index: 5;
}

/* --- 刊头带 --- */
.masthead-band {
  background:
    radial-gradient(120% 160% at 50% -40%, #8F1426 0%, var(--crimson) 46%, #5E0A16 100%);
  border-bottom: 1px solid var(--line-light);
}

.masthead-band__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  column-gap: 20px;
  padding-block: 22px 18px;
}

.masthead-band__slot {
  display: flex;
  align-items: center;
  min-width: 0;
}

.masthead-band__slot--start { justify-content: flex-start; }
.masthead-band__slot--end { justify-content: flex-end; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* --- 品牌报头 --- */
.masthead { text-align: center; }

.masthead__brand {
  display: block;
  text-decoration: none;
  color: var(--gold-light);
  transition: color 0.2s var(--ease);
}

.masthead__brand:hover { color: #FFF4D4; }

.masthead__brand-main {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.75rem, 4vw, 2.7rem);
  letter-spacing: 0.2em;
  line-height: 1.1;
  text-indent: 0.2em;
  text-shadow: 0 1px 0 rgba(18, 13, 15, 0.5);
}

.masthead__brand-sub {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.34em;
  text-indent: 0.34em;
  color: rgba(232, 217, 168, 0.72);
}

.masthead__meta {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: rgba(247, 243, 238, 0.55);
}

.masthead__code { color: var(--gold); }

/* --- 版本切换器 --- */
.version-switch {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border: 1px solid var(--line-gold);
  border-radius: 999px;
  background: rgba(18, 13, 15, 0.3);
}

.version-switch__btn {
  appearance: none;
  border: 0;
  background: none;
  cursor: pointer;
  padding: 7px 14px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: rgba(247, 243, 238, 0.72);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.version-switch__btn:hover { color: #FFF4D4; }

.version-switch__btn.is-active {
  background: linear-gradient(180deg, var(--gold-light), var(--gold));
  color: #3A2405;
}

.version-switch--footer {
  background: rgba(247, 243, 238, 0.06);
  border-color: rgba(232, 217, 168, 0.34);
}

/* --- 索引按钮 --- */
.index-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  cursor: pointer;
  background: rgba(18, 13, 15, 0.34);
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  color: var(--gold-light);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.index-btn:hover {
  background: rgba(201, 162, 39, 0.2);
  border-color: var(--gold);
  color: #FFF4D4;
}

.index-btn__mark {
  position: relative;
  flex: none;
  width: 12px;
  height: 12px;
  border: 1px solid currentColor;
}

.index-btn__mark::before,
.index-btn__mark::after {
  content: "";
  position: absolute;
  left: 2px;
  right: 2px;
  height: 1px;
  background: currentColor;
}

.index-btn__mark::before { top: 4px; }
.index-btn__mark::after { top: 7px; }

.index-btn__text { white-space: nowrap; }

/* --- 索引面板 --- */
.index-panel {
  background: linear-gradient(180deg, rgba(18, 13, 15, 0.55), rgba(74, 7, 18, 0.9));
  border-top: 1px solid var(--line-light);
}

.index-panel__inner {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px 36px;
  padding-block: 26px 30px;
}

.index-panel__title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--gold);
  padding-bottom: 9px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line-light);
}

.index-panel__list {
  display: grid;
  gap: 9px;
}

.index-panel__link {
  font-size: 0.86rem;
  text-decoration: none;
  color: rgba(247, 243, 238, 0.8);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.index-panel__link:hover {
  color: var(--gold-light);
  border-bottom-color: var(--line-gold);
}

/* --- 主导航 --- */
.site-nav {
  background: linear-gradient(180deg, #5E0A16 0%, var(--crimson-deep) 100%);
  border-top: 1px solid var(--line-light);
}

.site-nav__bar {
  display: flex;
  align-items: center;
  gap: 30px;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0 30px;
}

.site-nav__link {
  display: inline-block;
  padding: 15px 2px 13px;
  font-size: 0.94rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: rgba(247, 243, 238, 0.82);
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.site-nav__link:hover { color: #FFF4D4; }

.site-nav__link[aria-current="page"] {
  color: var(--gold-light);
  border-bottom-color: var(--gold);
}

.site-nav__toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 14px 4px;
  background: none;
  border: 0;
  cursor: pointer;
  color: var(--gold-light);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
}

.site-nav__bars {
  position: relative;
  width: 18px;
  height: 12px;
  border-top: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
}

.site-nav__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: currentColor;
}

/* --- 双层索引带 --- */
.site-nav__layer {
  border-top: 1px solid rgba(232, 217, 168, 0.12);
  background: rgba(18, 13, 15, 0.22);
}

.site-nav__layer-inner {
  display: flex;
  align-items: flex-start;
  gap: 34px;
  padding-block: 15px 19px;
}

.layer-switch {
  display: inline-flex;
  flex: none;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
}

.layer-switch__btn {
  appearance: none;
  border: 0;
  background: none;
  cursor: pointer;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: rgba(247, 243, 238, 0.62);
  border-radius: 1px;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.layer-switch__btn:hover { color: var(--gold-light); }

.layer-switch__btn.is-active {
  background: rgba(201, 162, 39, 0.2);
  color: var(--gold-light);
}

.layer-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px 22px;
  flex: 1 1 auto;
}

.layer-list__link {
  display: block;
  padding: 5px 0;
  font-size: 0.82rem;
  text-decoration: none;
  color: rgba(247, 243, 238, 0.74);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.layer-list__link:hover {
  color: var(--gold-light);
  border-bottom-color: var(--line-gold);
}

/* --- 滚动收缩态 --- */
.site-header.is-condensed .masthead-band__inner { padding-block: 10px 9px; }
.site-header.is-condensed .masthead__brand-main { font-size: 1.15rem; letter-spacing: 0.14em; }
.site-header.is-condensed .masthead__brand-sub,
.site-header.is-condensed .masthead__meta { display: none; }
.site-header.is-condensed .site-nav__layer { display: none; }
.site-header.is-condensed .site-nav__link { padding-block: 12px 10px; }

/* =========================================================
   按钮
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease),
              border-color 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--sm { padding: 10px 17px; font-size: 0.82rem; }

.btn--gold {
  background: linear-gradient(180deg, var(--gold-light), var(--gold));
  color: #3A2405;
  border-color: rgba(232, 217, 168, 0.72);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4), 0 8px 20px -12px rgba(18, 13, 15, 0.85);
}

.btn--gold:hover { background: linear-gradient(180deg, #F5E9C4, #D8B132); }

.btn--ghost {
  background: transparent;
  border-color: var(--line-gold);
  color: var(--gold-light);
}

.btn--ghost:hover {
  background: rgba(201, 162, 39, 0.16);
  border-color: var(--gold);
  color: #FFF4D4;
}

.btn--ink {
  background: var(--obsidian);
  border-color: var(--obsidian);
  color: var(--pearl);
}

.btn--ink:hover { background: var(--crimson-deep); border-color: var(--crimson-deep); }

.btn--jade {
  background: transparent;
  border-color: rgba(47, 143, 131, 0.55);
  color: var(--jade);
}

.btn--jade:hover { background: rgba(47, 143, 131, 0.12); }

/* =========================================================
   正文容器 / 面包屑 / 章节头
   ========================================================= */
.prose {
  max-width: 70ch;
  color: var(--ink-soft);
}

.prose > * + * { margin-top: 1.05em; }

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
  margin-top: 1.7em;
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
  list-style: disc;
}

.prose ol { list-style: decimal; }

.breadcrumbs { padding-block: 20px 0; }

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.08em;
  color: var(--warm-gray);
}

.breadcrumbs__link {
  text-decoration: none;
  color: var(--warm-gray);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.breadcrumbs__link:hover {
  color: var(--crimson);
  border-bottom-color: var(--crimson);
}

.breadcrumbs__sep { color: var(--gold); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  padding-bottom: 14px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--hairline);
}

.section-head__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  letter-spacing: 0.03em;
  color: var(--ink);
}

.section-head__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--warm-gray);
}

.rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(201, 162, 39, 0.9), rgba(201, 162, 39, 0));
}

/* =========================================================
   栅格
   ========================================================= */
.grid {
  display: grid;
  gap: var(--gap);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.grid--split {
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  align-items: start;
}

.grid--index {
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.42fr);
  align-items: start;
}

/* =========================================================
   卡片与档案组件
   ========================================================= */
.card {
  position: relative;
  display: block;
  padding: 24px 22px 22px;
  background: #FFFFFF;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), border-color 0.28s var(--ease);
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(201, 162, 39, 0.6);
  box-shadow: var(--shadow-lift);
}

.card--plain { background: var(--pearl-deep); box-shadow: none; }

.card--dark {
  background: linear-gradient(160deg, var(--obsidian-soft) 0%, #2A0710 100%);
  border-color: rgba(232, 217, 168, 0.18);
  color: rgba(247, 243, 238, 0.82);
  box-shadow: 0 20px 44px -30px rgba(18, 13, 15, 0.9);
}

.card--dark .card__title { color: var(--gold-light); }

.card__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.card__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  line-height: 1.4;
  color: var(--ink);
}

.card__body {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.card__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--warm-gray);
}

.card__link {
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--crimson);
  border-bottom: 1px solid rgba(122, 14, 30, 0.3);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.card__link:hover { color: var(--gold); border-bottom-color: var(--gold); }

.stack {
  display: grid;
  gap: 14px;
}

/* --- 时间轴 --- */
.timeline {
  position: relative;
  display: grid;
  gap: 26px;
  padding-left: 26px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 5px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 162, 39, 0.1));
}

.timeline__item { position: relative; }

.timeline__marker {
  position: absolute;
  top: 6px;
  left: -26px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--pearl);
  border: 2px solid var(--gold);
}

.timeline__date {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--warm-gray);
  margin-bottom: 6px;
}

.timeline__body { font-size: 0.94rem; color: var(--ink-soft); }

/* --- 标签与状态 --- */
.index-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 11px;
  border: 1px solid var(--line-gold);
  border-radius: 999px;
  background: rgba(201, 162, 39, 0.12);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: #8A6D12;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 10px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--warm-gray);
  background: #FFFFFF;
}

.status-pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.status-pill--ok {
  color: var(--success);
  border-color: rgba(62, 125, 90, 0.4);
  background: rgba(62, 125, 90, 0.08);
}

.status-pill--jade {
  color: var(--jade);
  border-color: rgba(47, 143, 131, 0.4);
  background: rgba(47, 143, 131, 0.08);
}

/* =========================================================
   图片容器
   ========================================================= */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 110% at 20% 0%, rgba(143, 20, 38, 0.9) 0%, rgba(74, 7, 18, 0.95) 52%, var(--obsidian) 100%);
}

.media-frame > img,
.media-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--portrait { aspect-ratio: 3 / 4; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  border: 1px solid var(--line-gold);
  border-radius: 999px;
  background: rgba(18, 13, 15, 0.7);
  color: var(--gold-light);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
}

.media-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 14px 16px;
  background: linear-gradient(180deg, rgba(18, 13, 15, 0) 0%, rgba(18, 13, 15, 0.86) 100%);
  color: rgba(247, 243, 238, 0.88);
  font-size: 0.82rem;
  line-height: 1.6;
}

/* =========================================================
   标签页 / 过滤条
   ========================================================= */
.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 1px solid var(--hairline);
}

.tabs__tab {
  appearance: none;
  padding: 10px 18px;
  background: none;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--warm-gray);
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.tabs__tab:hover { color: var(--crimson); }

.tabs__tab[aria-selected="true"] {
  color: var(--crimson);
  background: #FFFFFF;
  border-color: var(--hairline);
  border-top: 2px solid var(--gold);
  font-weight: 600;
}

.tabs__panel { padding-top: 22px; }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-chip {
  appearance: none;
  padding: 7px 15px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: #FFFFFF;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.08em;
  color: var(--warm-gray);
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.filter-chip:hover { border-color: var(--line-gold); }

.filter-chip[aria-pressed="true"] {
  background: var(--crimson);
  border-color: var(--crimson);
  color: var(--gold-light);
}

[data-filter-item][hidden] { display: none !important; }

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  margin-top: 72px;
  background: var(--obsidian);
  color: rgba(247, 243, 238, 0.72);
  font-size: 0.9rem;
}

.footer-index {
  padding-block: 54px 44px;
  border-top: 3px solid var(--gold);
  border-bottom: 1px solid rgba(232, 217, 168, 0.16);
  background:
    radial-gradient(130% 150% at 10% 0%, rgba(143, 20, 38, 0.95) 0%, rgba(74, 7, 18, 0.96) 46%, rgba(18, 13, 15, 1) 100%);
}

.footer-index__inner {
  display: grid;
  grid-template-columns:
    minmax(210px, 1.15fr)
    minmax(150px, 0.8fr)
    minmax(260px, 1.5fr)
    minmax(150px, 0.8fr);
  gap: 36px 32px;
}

.footer-index__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.36rem;
  letter-spacing: 0.18em;
  color: var(--gold-light);
}

.footer-index__note {
  margin-top: 12px;
  font-size: 0.84rem;
  line-height: 1.75;
  color: rgba(247, 243, 238, 0.62);
}

.footer-index__code {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: rgba(201, 162, 39, 0.85);
}

.footer-index__col-title {
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid rgba(232, 217, 168, 0.22);
  font-family: var(--font-mono);
  font-size: 0.71rem;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.footer-index__list {
  display: grid;
  gap: 9px;
}

.footer-index__list--dense {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px 18px;
}

.footer-index__link {
  text-decoration: none;
  color: rgba(247, 243, 238, 0.78);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-index__link:hover {
  color: var(--gold-light);
  border-bottom-color: rgba(201, 162, 39, 0.66);
}

/* --- 联系与合规 --- */
.footer-meta {
  padding-block: 30px;
  background: var(--obsidian-soft);
  border-bottom: 1px solid rgba(232, 217, 168, 0.12);
}

.footer-meta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 28px 48px;
  align-items: start;
}

.footer-contact__label,
.footer-legal__title {
  padding-bottom: 8px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(232, 217, 168, 0.18);
  font-family: var(--font-mono);
  font-size: 0.71rem;
  letter-spacing: 0.2em;
  color: var(--jade);
}

.footer-contact__list {
  display: grid;
  gap: 10px;
}

.footer-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  font-size: 0.86rem;
}

.footer-contact__key {
  flex: none;
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  letter-spacing: 0.12em;
  color: rgba(232, 217, 168, 0.7);
}

.footer-contact__value {
  color: rgba(247, 243, 238, 0.9);
  word-break: break-all;
}

.copy-btn {
  appearance: none;
  padding: 3px 10px;
  border: 1px solid rgba(47, 143, 131, 0.5);
  border-radius: 999px;
  background: rgba(47, 143, 131, 0.1);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: #6FC4B7;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.copy-btn:hover { background: rgba(47, 143, 131, 0.24); color: #A6E2D8; }

.copy-btn.is-done {
  border-color: rgba(62, 125, 90, 0.7);
  background: rgba(62, 125, 90, 0.22);
  color: #A7D9BC;
}

.footer-legal__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-legal__link {
  text-decoration: none;
  color: rgba(247, 243, 238, 0.82);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-legal__link:hover {
  color: var(--gold-light);
  border-bottom-color: rgba(201, 162, 39, 0.66);
}

.footer-legal__icp {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.06em;
  color: rgba(247, 243, 238, 0.55);
}

.footer-copy {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.06em;
  color: rgba(247, 243, 238, 0.45);
}

/* --- 底栏 --- */
.footer-base {
  padding-block: 18px 26px;
  background: var(--obsidian);
}

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
}

.footer-base__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.footer-base__group--end { justify-content: flex-end; }

.footer-base__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: rgba(247, 243, 238, 0.45);
}

.a11y-toggle {
  appearance: none;
  padding: 9px 16px;
  border: 1px solid rgba(232, 217, 168, 0.34);
  border-radius: var(--radius);
  background: rgba(247, 243, 238, 0.05);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: rgba(247, 243, 238, 0.75);
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.a11y-toggle:hover { border-color: var(--gold); color: var(--gold-light); }

.a11y-toggle[aria-pressed="true"] {
  background: rgba(201, 162, 39, 0.2);
  border-color: var(--gold);
  color: var(--gold-light);
}

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 16px;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  background: transparent;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--gold-light);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.to-top:hover { background: rgba(201, 162, 39, 0.18); color: #FFF4D4; }

.to-top__mark {
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-bottom: 6px solid currentColor;
}

/* 无障碍放大模式 */
body.a11y-mode { font-size: 18px; }
body.a11y-mode .site-nav__link { font-size: 1.05rem; }
body.a11y-mode .layer-list__link { font-size: 0.94rem; }
body.a11y-mode .card__body,
body.a11y-mode .prose { font-size: 1.02rem; }
body.a11y-mode .site-footer { font-size: 1rem; }

/* =========================================================
   滚动显现
   ========================================================= */
body.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.62s var(--ease), transform 0.62s var(--ease);
}

body.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1024px) {
  .footer-index__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .grid--split,
  .grid--index { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  :root { --gutter: 18px; --gap: 18px; }

  .masthead-band__inner {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
    row-gap: 16px;
    padding-block: 20px 18px;
  }

  .masthead { grid-row: 1; }
  .masthead-band__slot--end { grid-row: 2; justify-content: center; }
  .masthead-band__slot--start { grid-row: 3; justify-content: center; }

  .header-actions { justify-content: center; }

  .masthead__brand-main { letter-spacing: 0.16em; }
  .masthead__brand-sub { letter-spacing: 0.24em; }

  .index-panel__inner { grid-template-columns: minmax(0, 1fr); gap: 22px; }

  .site-nav__bar {
    display: block;
    padding-inline: var(--gutter);
  }

  .site-nav__toggle {
    display: flex;
    width: 100%;
    justify-content: center;
    padding-block: 14px;
  }

  .site-nav__list { display: none; }
  .site-nav__layer { display: none; }

  .site-nav[data-open] .site-nav__list {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding-bottom: 10px;
  }

  .site-nav[data-open] .site-nav__item {
    border-top: 1px solid rgba(232, 217, 168, 0.16);
  }

  .site-nav[data-open] .site-nav__link {
    display: block;
    padding: 14px 4px;
    border-bottom: 0;
  }

  .site-nav[data-open] .site-nav__link[aria-current="page"] {
    padding-left: 12px;
    border-left: 3px solid var(--gold);
    color: var(--gold-light);
  }

  .site-nav[data-open] .site-nav__layer { display: block; }

  .site-nav__layer-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    padding-block: 16px 20px;
  }

  .layer-switch { align-self: flex-start; }

  .layer-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-index { padding-block: 40px 34px; }
  .footer-index__inner { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .footer-meta__inner { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .footer-base__inner { flex-direction: column; align-items: stretch; }
  .footer-base__group { justify-content: flex-start; }
  .footer-base__group--end { justify-content: flex-start; }

  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 520px) {
  body { font-size: 15.5px; }

  .layer-list { grid-template-columns: minmax(0, 1fr); }
  .footer-index__list--dense { grid-template-columns: minmax(0, 1fr); }
  .tabs__tab { padding: 9px 13px; }
  .btn { padding: 11px 18px; }
  .site-footer { margin-top: 52px; }
}

/* =========================================================
   动效偏好
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  body.js [data-reveal],
  body.js [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }
}