/* ============================================================
   百家家乐主页 · 共享样式 /assets/site.css
   蓝图网格 + 粗野主义卡片 + 暖金朱红深墨蓝色彩节奏
   ============================================================ */

/* ---------- 1. reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  --ink-navy: #14213D;
  --navy-deep: #0C1730;
  --navy-soft: #23375F;
  --warm-gold: #D9A441;
  --gold-deep: #A9761C;
  --amber-light: #F4E1BB;
  --vermilion: #C0392B;
  --cream: #FBF6EC;
  --paper: #F3ECE0;
  --graphite: #33302B;
  --jade: #2F6E63;

  --shell-w: 1240px;
  --gutter: 24px;

  --grid-line: rgba(20, 33, 61, 0.06);
  --hairline: rgba(20, 33, 61, 0.16);
  --shadow-hard: 6px 6px 0 var(--navy-deep);
  --shadow-mid: 4px 4px 0 rgba(12, 23, 48, 0.24);
  --ease: cubic-bezier(.2, .7, .3, 1);

  --font-display: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: var(--font-display);
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

/* ---------- 3. 基底与中文排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: var(--graphite);
  background-color: var(--cream);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--ink-navy);
  line-height: 1.22;
  letter-spacing: 0.02em;
}

p { text-wrap: pretty; }

::selection { background: var(--warm-gold); color: var(--ink-navy); }

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

/* ---------- 4. 排版组件 ---------- */
.display-1 {
  font-size: clamp(2.2rem, 5vw, 4.4rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
  font-weight: 800;
  color: var(--ink-navy);
}

.display-2 {
  font-size: clamp(1.65rem, 3.2vw, 2.6rem);
  line-height: 1.2;
}

.display-3 {
  font-size: clamp(1.2rem, 1.9vw, 1.55rem);
  line-height: 1.35;
}

.num {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  letter-spacing: 0.02em;
  font-feature-settings: "tnum" 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--gold-deep);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--warm-gold);
}

.lede {
  font-size: clamp(1rem, 1.4vw, 1.14rem);
  line-height: 1.8;
  color: rgba(51, 48, 43, 0.88);
}

.prose { max-width: 68ch; }
.prose > * + * { margin-top: 1em; }
.prose h2 { margin-top: 2em; font-size: clamp(1.35rem, 2.2vw, 1.8rem); }
.prose h3 { margin-top: 1.6em; font-size: 1.16rem; }
.prose ul, .prose ol { padding-left: 1.2em; list-style: disc; }
.prose li + li { margin-top: 0.4em; }
.prose strong { color: var(--ink-navy); }

.side-note {
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--gold-deep);
  font-weight: 600;
  text-transform: none;
}

/* ---------- 5. 布局容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(64px, 9vw, 128px); }
.section--tight { padding-block: clamp(40px, 5vw, 72px); }

.grid { display: grid; gap: 24px; }

.stack > * + * { margin-top: 16px; }

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

.rule {
  height: 2px;
  border: 0;
  background: var(--ink-navy);
  position: relative;
}

.rule::before,
.rule::after {
  content: "";
  position: absolute;
  top: -5px;
  width: 2px;
  height: 12px;
  background: var(--gold-deep);
}

.rule::before { left: 0; }
.rule::after { right: 0; }

@media (min-width: 900px) {
  :root { --gutter: 48px; }

  .grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 28px; }
  .col-3 { grid-column: span 3; }
  .col-4 { grid-column: span 4; }
  .col-5 { grid-column: span 5; }
  .col-6 { grid-column: span 6; }
  .col-7 { grid-column: span 7; }
  .col-8 { grid-column: span 8; }
  .col-9 { grid-column: span 9; }
  .col-10 { grid-column: span 10; }
  .col-12 { grid-column: span 12; }
  .start-2 { grid-column-start: 2; }
  .start-7 { grid-column-start: 7; }
}

/* ---------- 6. 卡片与装饰 ---------- */
.card {
  position: relative;
  background: var(--cream);
  border: 2px solid var(--ink-navy);
  box-shadow: var(--shadow-hard);
  padding: clamp(20px, 2.6vw, 28px);
}

.card--paper { background: var(--paper); }
.card--amber { background: var(--amber-light); }
.card--ink { background: var(--ink-navy); color: var(--cream); border-color: var(--navy-deep); }
.card--ink h2, .card--ink h3, .card--ink h4 { color: var(--cream); }
.card--flat { box-shadow: none; }

.card--raise { margin-top: -16px; }
.card--drop { margin-top: 16px; }

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

.index-badge {
  display: inline-grid;
  place-items: center;
  min-width: 30px;
  height: 30px;
  padding-inline: 6px;
  background: var(--warm-gold);
  color: var(--ink-navy);
  border: 2px solid var(--navy-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  flex: 0 0 auto;
}

.index-badge--ink { background: var(--ink-navy); color: var(--warm-gold); }
.index-badge--jade { background: var(--jade); color: var(--cream); border-color: #1F4F47; }

.tick-frame { position: relative; }

.tick-frame::before,
.tick-frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--gold-deep);
  pointer-events: none;
}

.tick-frame::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.tick-frame::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: 1.5px solid var(--ink-navy);
  background: var(--cream);
  color: var(--ink-navy);
  border-radius: 999px;
}

.tag--gold { background: var(--amber-light); border-color: var(--gold-deep); color: #6B4A0C; }
.tag--jade { background: rgba(47, 110, 99, 0.12); border-color: var(--jade); color: #235349; }
.tag--vermilion { background: var(--vermilion); border-color: #8E2A1F; color: #FFF3EC; }
.tag--ink { background: var(--ink-navy); border-color: var(--navy-deep); color: var(--amber-light); }

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cream);
  background: var(--ink-navy);
  border: 2px solid var(--navy-deep);
  box-shadow: var(--shadow-mid);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
    background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.btn:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 rgba(12, 23, 48, 0.28); }
.btn:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 rgba(12, 23, 48, 0.28); }

.btn--gold { background: var(--warm-gold); color: var(--ink-navy); border-color: var(--navy-deep); }
.btn--gold:hover { background: #E5B457; }

.btn--ghost { background: transparent; color: var(--ink-navy); }

.btn--sm { padding: 8px 15px; font-size: 13px; }

/* ---------- 8. 面包屑 ---------- */
.breadcrumb { padding-block: 22px 0; font-size: 12.5px; color: rgba(51, 48, 43, 0.72); }

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.breadcrumb li { display: inline-flex; align-items: center; gap: 4px; }

.breadcrumb li + li::before {
  content: "/";
  color: var(--gold-deep);
  margin-right: 4px;
}

.breadcrumb a { color: var(--ink-navy); border-bottom: 1px solid transparent; }
.breadcrumb a:hover { border-bottom-color: var(--warm-gold); }

.breadcrumb [aria-current="page"] { color: var(--gold-deep); font-weight: 700; }

/* ---------- 9. 图片容器基类（页面阶段放置占位图） ---------- */
.media-frame {
  position: relative;
  display: block;
  margin: 0;
  border: 2px solid var(--ink-navy);
  background: var(--paper);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.media-frame img,
.media-frame video,
.media-frame svg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--3x2 { aspect-ratio: 3 / 2; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__tag {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  background: var(--ink-navy);
  color: var(--amber-light);
  border: 1.5px solid var(--navy-deep);
}

.media-frame__caption {
  display: block;
  padding: 8px 12px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: rgba(51, 48, 43, 0.74);
  background: var(--paper);
  border-top: 1px solid var(--hairline);
}

.media-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* ---------- 10. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.42s var(--ease), transform 0.42s var(--ease);
  transition-delay: var(--delay, 0ms);
}

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

/* ---------- 11. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -72px;
  z-index: 200;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--cream);
  background: var(--ink-navy);
  border: 2px solid var(--warm-gold);
  transition: top 0.18s var(--ease);
}

.skip-link:focus { top: 10px; }

/* ---------- 12. 常驻顶部区 ---------- */
.topbar-stack {
  position: sticky;
  top: 0;
  z-index: 80;
}

.notice-bar {
  background-color: var(--warm-gold);
  background-image: linear-gradient(100deg, #D9A441 0%, #E7C072 46%, #F4E1BB 100%);
  border-bottom: 2px solid var(--navy-deep);
  color: var(--ink-navy);
}

.notice-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  min-height: 42px;
  padding-block: 6px;
}

.notice-bar__tag {
  flex: 0 0 auto;
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.18em;
  background: var(--ink-navy);
  color: var(--amber-light);
  border: 2px solid var(--navy-deep);
}

.notice-bar__text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.5;
}

.notice-bar__pill {
  flex: 0 0 auto;
  margin-left: auto;
  padding: 5px 14px;
  font-size: 12.5px;
  font-weight: 700;
  white-space: nowrap;
  color: var(--amber-light);
  background: var(--ink-navy);
  border: 2px solid var(--navy-deep);
  border-radius: 999px;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.notice-bar__pill:hover {
  background: var(--vermilion);
  border-color: #8E2A1F;
  color: #FFF3EC;
}

/* ---------- 13. 页头 ---------- */
.site-header {
  position: relative;
  background: var(--cream);
  border-bottom: 2px solid var(--ink-navy);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  min-height: 72px;
  padding-block: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  color: var(--warm-gold);
  background: var(--ink-navy);
  border: 2px solid var(--navy-deep);
  box-shadow: 4px 4px 0 var(--warm-gold);
  transition: transform 0.18s var(--ease);
}

.brand:hover .brand__mark { transform: translate(-2px, -2px); }

.brand__text { display: flex; flex-direction: column; line-height: 1.25; }

.brand__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--ink-navy);
}

.brand__sub {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--gold-deep);
}

.fav-hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 600;
  color: var(--gold-deep);
  background: rgba(244, 225, 187, 0.55);
  border: 1px dashed rgba(169, 118, 28, 0.55);
}

.fav-hint__icon { font-size: 13px; color: var(--warm-gold); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-navy);
  background: var(--cream);
  border: 2px solid var(--ink-navy);
  box-shadow: 3px 3px 0 rgba(12, 23, 48, 0.2);
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink-navy);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--ink-navy);
  transition: transform 0.24s var(--ease), opacity 0.24s var(--ease);
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

.site-nav { margin-left: auto; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 11px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-navy);
  border: 2px solid transparent;
  border-bottom-width: 3px;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease),
    color 0.18s var(--ease);
}

.site-nav__link:hover {
  background: var(--amber-light);
  border-color: var(--ink-navy);
}

.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold-deep);
}

.site-nav__link[aria-current="page"] {
  background: var(--ink-navy);
  border-color: var(--navy-deep);
  color: var(--cream);
}

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

.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -9px;
  width: 8px;
  height: 8px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--warm-gold);
}

/* ---------- 14. 右下角悬浮对照胶囊 ---------- */
.dock-pill {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 17px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--amber-light);
  background: var(--ink-navy);
  border: 2px solid var(--navy-deep);
  border-radius: 999px;
  box-shadow: 4px 4px 0 rgba(12, 23, 48, 0.42);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease),
    padding 0.24s var(--ease);
}

.dock-pill:hover {
  background: var(--vermilion);
  border-color: #8E2A1F;
  box-shadow: 6px 6px 0 rgba(12, 23, 48, 0.38);
}

.dock-pill__icon { font-size: 14px; color: var(--warm-gold); line-height: 1; }

.dock-pill__text {
  display: inline-block;
  max-width: 140px;
  overflow: hidden;
  white-space: nowrap;
  transition: max-width 0.26s var(--ease), opacity 0.26s var(--ease);
}

.dock-pill.is-compact { padding: 12px; }
.dock-pill.is-compact .dock-pill__text { max-width: 0; opacity: 0; }

/* ---------- 15. 页脚 ---------- */
.site-footer {
  margin-top: clamp(64px, 9vw, 128px);
  color: var(--cream);
  background-color: var(--ink-navy);
  background-image: linear-gradient(180deg, #23375F 0%, #14213D 45%, #0C1730 100%);
  border-top: 6px solid var(--warm-gold);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.5fr 1fr;
  gap: 36px;
  padding-block: clamp(48px, 7vw, 80px);
}

.site-footer__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  color: var(--ink-navy);
  background: var(--warm-gold);
  border: 2px solid var(--navy-deep);
  box-shadow: 4px 4px 0 rgba(217, 164, 65, 0.32);
}

.site-footer__name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.site-footer__line {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(251, 246, 236, 0.85);
}

.site-footer__meta {
  margin-top: 12px;
  padding-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(251, 246, 236, 0.6);
  border-top: 1px dashed rgba(244, 225, 187, 0.24);
}

.site-footer__title {
  margin-bottom: 16px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.24em;
  color: var(--warm-gold);
}

.site-footer__links li + li { margin-top: 10px; }

.site-footer__links a {
  display: inline-block;
  font-size: 14.5px;
  color: rgba(251, 246, 236, 0.86);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.site-footer__links a:hover {
  color: var(--warm-gold);
  border-bottom-color: var(--warm-gold);
}

.site-footer__contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding-block: 9px;
  font-size: 14px;
  border-bottom: 1px dashed rgba(244, 225, 187, 0.22);
}

.site-footer__label {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--warm-gold);
}

.site-footer__value {
  color: var(--cream);
  word-break: break-all;
}

.copy-btn {
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--amber-light);
  background: transparent;
  border: 1.5px solid rgba(244, 225, 187, 0.5);
  border-radius: 999px;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.copy-btn:hover {
  background: var(--warm-gold);
  border-color: var(--warm-gold);
  color: var(--ink-navy);
}

.copy-btn.is-done {
  background: var(--jade);
  border-color: var(--jade);
  color: #F2FBF8;
}

.site-footer__note {
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(251, 246, 236, 0.66);
}

.site-footer__icp {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--amber-light);
}

.site-footer__hours {
  margin-top: 8px;
  font-size: 12.5px;
  color: rgba(251, 246, 236, 0.66);
}

.site-footer__bottom {
  background: var(--navy-deep);
  border-top: 1px solid rgba(244, 225, 187, 0.18);
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-block: 15px;
  font-size: 12.5px;
  color: rgba(251, 246, 236, 0.78);
}

.site-footer__hint {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.site-footer__hint-icon {
  font-size: 15px;
  color: var(--warm-gold);
}

.site-footer__copy {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1080px) {
  .site-footer__inner { grid-template-columns: 1.4fr 1fr 1.4fr; }
  .site-footer__legal { grid-column: span 3; }
}

@media (max-width: 900px) {
  .fav-hint { display: none; }
  .nav-toggle { display: inline-flex; margin-left: auto; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin: 0;
    padding: 8px var(--gutter) 18px;
    background: var(--cream);
    border-top: 2px solid var(--ink-navy);
    border-bottom: 2px solid var(--ink-navy);
    box-shadow: 0 6px 0 rgba(12, 23, 48, 0.14);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease),
      visibility 0.2s linear;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 13px 6px;
    font-size: 15px;
    border: 0;
    border-bottom: 1px solid var(--hairline);
  }

  .site-nav__link:hover { background: var(--amber-light); }

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

  .site-nav__link[aria-current="page"]::after { display: none; }

  .site-footer__inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .site-footer__legal { grid-column: span 2; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }

  .notice-bar__text { font-size: 12.5px; }
  .notice-bar__pill { margin-left: 0; }

  .brand__sub { letter-spacing: 0.16em; }
  .brand__mark { width: 38px; height: 38px; font-size: 18px; }

  .site-footer__inner { grid-template-columns: 1fr; gap: 28px; }
  .site-footer__legal { grid-column: span 1; }

  .site-footer__bottom-inner { flex-direction: column; align-items: flex-start; }

  .dock-pill { right: 14px; bottom: 14px; padding: 10px 14px; }
  .dock-pill.is-compact { padding: 11px; }

  .card--raise, .card--drop { margin-top: 0; }
}

/* ---------- 17. 降低动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    transform: none;
    transition: opacity 0.3s linear;
    transition-delay: 0ms !important;
  }
}