/* ==========================================================================
   开元棋牌游戏 · 共享样式表 /assets/site.css
   技术蓝图网格 × 复古棋牌室：框架式导航 + 刻度索引 + 矿物色节奏
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 色彩：自然矿物 + 棋牌室 */
  --ink: #1E1B16;
  --paper: #F5F1E8;
  --card: #EAE3D4;
  --mist: #DCE6DF;
  --stone: #6E6A62;
  --green-900: #0C221D;
  --green-800: #14312A;
  --green-600: #3F6B5B;
  --gold-600: #B08A3E;
  --gold-400: #D9B65C;
  --cinnabar: #A6362B;

  /* 版面 */
  --frame-w: 216px;
  --maxw: 1180px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;

  /* 字体 */
  --font-serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, "SimSun", serif;
  --font-sans: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --shadow-1: 0 1px 0 rgba(12, 34, 29, .06), 0 10px 22px -16px rgba(12, 34, 29, .55);
  --shadow-2: 0 2px 0 rgba(12, 34, 29, .08), 0 20px 38px -20px rgba(12, 34, 29, .6);
  --ease: 240ms cubic-bezier(.22, .61, .36, 1);

  --line-hair: 1px solid rgba(176, 138, 62, .45);
  --line-soft: 1px solid rgba(20, 49, 42, .12);
}

/* ---------- 3. 基础排版 ---------- */
body {
  padding-left: var(--frame-w);
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(900px 520px at 82% -6%, rgba(217, 182, 92, .16), transparent 68%),
    radial-gradient(700px 400px at 6% 104%, rgba(63, 107, 91, .10), transparent 70%),
    repeating-linear-gradient(to right, rgba(20, 49, 42, .055) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(to bottom, rgba(20, 49, 42, .055) 0 1px, transparent 1px 88px);
  background-attachment: fixed, fixed, fixed, fixed;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: -.012em;
  color: var(--green-900);
}

strong, b { font-weight: 600; color: var(--green-800); }
small { font-size: 14px; }

#main-content { display: block; }

/* ---------- 4. 焦点可见 ---------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
summary:focus-visible,
[data-copy]:focus-visible {
  outline: 2px solid var(--gold-400);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ---------- 5. 跳至正文 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 200;
  padding: 11px 20px;
  transform: translate(-50%, -140%);
  background: var(--gold-400);
  color: var(--green-900);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-2);
  transition: transform var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- 6. 布局与容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(18px, 3.6vw, 44px);
}
.shell-narrow { max-width: 820px; }

.section { padding-block: clamp(40px, 6vw, 82px); }
.section-tight { padding-block: clamp(26px, 3.6vw, 46px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 26px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.grid { display: grid; gap: clamp(16px, 2.4vw, 26px); }
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 26px);
}
.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-12 { grid-column: span 12; }

/* ---------- 7. 文字层级 ---------- */
.t-display {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(34px, 5.2vw, 54px);
  line-height: 1.12;
  letter-spacing: -.018em;
  color: var(--green-900);
}
.t-1 { font-family: var(--font-serif); font-weight: 600; font-size: clamp(27px, 3vw, 34px); line-height: 1.24; color: var(--green-900); }
.t-2 { font-family: var(--font-serif); font-weight: 600; font-size: clamp(22px, 2.2vw, 26px); line-height: 1.3; color: var(--green-800); }
.t-3 { font-family: var(--font-serif); font-weight: 600; font-size: 20px; line-height: 1.4; color: var(--green-800); }
.t-lead { font-size: clamp(17px, 1.6vw, 19px); line-height: 1.82; color: var(--stone); max-width: 64ch; }
.t-mono { font-family: var(--font-mono); font-size: 13px; letter-spacing: .08em; color: var(--stone); }

/* ---------- 8. 眉标与分割线 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold-600);
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--gold-600); flex: none; }

.rule { height: 1px; background: linear-gradient(90deg, rgba(176, 138, 62, .78), rgba(176, 138, 62, .10)); }
.rule-ruler {
  height: 8px;
  color: rgba(176, 138, 62, .55);
  background-image: repeating-linear-gradient(to right, currentColor 0 1px, transparent 1px 16px);
}

/* ---------- 9. 卡片 / 面板 / 胶囊 ---------- */
.card {
  position: relative;
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--card);
  border: var(--line-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}
.card:hover,
.card:focus-within {
  transform: translateY(-2px);
  border-color: var(--gold-400);
  box-shadow: var(--shadow-2);
}
.card-soft { background: var(--paper); }
.card-dark {
  background: var(--green-800);
  border-color: rgba(176, 138, 62, .38);
  color: rgba(245, 241, 232, .9);
}
.card-dark h2, .card-dark h3, .card-dark .t-2, .card-dark .t-3 { color: var(--paper); }

.plate {
  padding: clamp(18px, 3vw, 32px);
  border: 1px solid rgba(20, 49, 42, .14);
  border-radius: var(--radius-lg);
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(to right, rgba(20, 49, 42, .07) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(to bottom, rgba(20, 49, 42, .07) 0 1px, transparent 1px 34px);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: var(--mist);
  border: 1px solid rgba(20, 49, 42, .12);
  color: var(--green-800);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.5;
  white-space: nowrap;
}
.pill-gold { background: rgba(176, 138, 62, .16); border-color: rgba(176, 138, 62, .42); color: #7A5C1E; }
.pill-alert { background: rgba(166, 54, 43, .12); border-color: rgba(166, 54, 43, .34); color: var(--cinnabar); }
.pill-dark { background: rgba(12, 34, 29, .8); border-color: rgba(217, 182, 92, .42); color: var(--gold-400); }

/* ---------- 10. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 17px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
}
.btn-gold {
  background: linear-gradient(160deg, var(--gold-400), var(--gold-600));
  color: var(--green-900);
  box-shadow: 0 12px 24px -16px rgba(12, 34, 29, .95);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px var(--gold-400), 0 16px 28px -16px rgba(12, 34, 29, .95); }
.btn-ghost { background: rgba(217, 182, 92, .06); border-color: rgba(217, 182, 92, .55); color: var(--gold-400); }
.btn-ghost:hover { transform: translateY(-2px); background: rgba(217, 182, 92, .14); border-color: var(--gold-400); }
.btn-solid { background: var(--green-800); color: var(--paper); }
.btn-solid:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }
.btn-quiet { background: var(--card); border-color: rgba(20, 49, 42, .2); color: var(--green-800); }
.btn-quiet:hover { transform: translateY(-2px); border-color: var(--gold-600); color: var(--gold-600); }

/* ---------- 11. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--stone);
}
.breadcrumb a { color: var(--green-600); border-bottom: 1px solid rgba(63, 107, 91, .38); }
.breadcrumb a:hover { color: var(--gold-600); border-bottom-color: var(--gold-600); }
.breadcrumb-sep { color: rgba(110, 106, 98, .6); }

/* ---------- 12. 图片容器（页面阶段放图） ---------- */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid rgba(20, 49, 42, .14);
  border-radius: var(--radius-lg);
  background-color: var(--mist);
  background-image: linear-gradient(150deg, rgba(63, 107, 91, .28), rgba(234, 227, 212, .72));
}
.img-frame img { width: 100%; height: 100%; object-fit: cover; }
.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--tall { aspect-ratio: 4 / 5; }
.img-frame[data-label]::after {
  content: attr(data-label);
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  background: rgba(12, 34, 29, .82);
  color: var(--gold-400);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
}

/* ---------- 13. 数据表 ---------- */
.table { font-size: 15px; }
.table caption {
  padding-bottom: 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--stone);
}
.table th {
  padding: 10px 12px;
  background: var(--green-600);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  text-align: left;
}
.table td {
  padding: 11px 12px;
  border-bottom: 1px solid rgba(20, 49, 42, .12);
  vertical-align: top;
}
.table tbody tr:nth-child(even) { background: var(--mist); }
.table tbody tr:hover { background: rgba(176, 138, 62, .14); }
.table th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.table th:last-child { border-radius: 0 var(--radius-sm) 0 0; }

/* ---------- 14. 正文内链与复制 ---------- */
.link-underline { color: var(--green-600); border-bottom: 1px solid rgba(63, 107, 91, .4); transition: color var(--ease), border-color var(--ease); }
.link-underline:hover { color: var(--gold-600); border-bottom-color: var(--gold-600); }

[data-copy] { cursor: copy; border-bottom: 1px dashed rgba(217, 182, 92, .45); }
[data-copy][data-copied="true"] { color: var(--gold-400); border-bottom-color: var(--gold-400); }
[data-copy][data-copied="true"]::after {
  content: " 已复制";
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--gold-400);
}

/* ---------- 15. 页头：框架式导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 60;
  width: var(--frame-w);
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 26px 22px 22px;
  color: var(--paper);
  background-color: var(--green-900);
  background-image:
    radial-gradient(140% 55% at 50% -12%, rgba(217, 182, 92, .16), transparent 66%),
    repeating-linear-gradient(to bottom, rgba(245, 241, 232, .04) 0 1px, transparent 1px 48px);
  border-right: var(--line-hair);
}

.header-rail {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 8px;
  background-image: repeating-linear-gradient(to bottom, rgba(217, 182, 92, .55) 0 1px, transparent 1px 18px);
  pointer-events: none;
}
.rail-progress {
  position: absolute;
  top: 0;
  right: 0;
  width: 3px;
  height: 100%;
  transform: scaleY(0);
  transform-origin: top center;
  background: linear-gradient(to bottom, rgba(217, 182, 92, .9), rgba(176, 138, 62, .12));
  transition: transform 120ms linear;
}

.header-top { display: flex; flex-direction: column; gap: 0; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  flex: none;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(150deg, var(--gold-400), var(--gold-600));
  color: var(--green-900);
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  box-shadow: inset 0 0 0 1px rgba(12, 34, 29, .38);
}
.brand-text { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.brand-line {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--paper);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
  color: rgba(245, 241, 232, .62);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 13px;
  border: 1px solid rgba(217, 182, 92, .5);
  border-radius: var(--radius-pill);
  background: rgba(217, 182, 92, .08);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
}
.nav-toggle-bars { position: relative; display: block; width: 16px; height: 10px; }
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  border-radius: 2px;
  background: var(--gold-400);
  transition: transform var(--ease), opacity var(--ease);
}
.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { bottom: 0; }
.site-header[data-open="true"] .nav-toggle-bars::before { transform: translateY(4px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle-bars::after { transform: translateY(-4px) rotate(-45deg); }

.site-nav { display: flex; flex-direction: column; }
.nav-caption {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: rgba(217, 182, 92, .82);
}
.nav-list { display: flex; flex-direction: column; gap: 2px; }
.nav-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: 4px 16px 16px 4px;
  color: rgba(245, 241, 232, .82);
  font-size: 15px;
  line-height: 1.4;
  transition: background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease);
}
.nav-idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: rgba(176, 138, 62, .92);
}
.nav-label { min-width: 0; }
.nav-list a:hover,
.nav-list a:focus-visible {
  transform: translateX(2px);
  background: rgba(63, 107, 91, .45);
  border-left-color: var(--gold-400);
  color: #FFFFFF;
}
.nav-list a[aria-current="page"] {
  background: linear-gradient(90deg, rgba(176, 138, 62, .3), rgba(176, 138, 62, .05));
  border-left-color: var(--gold-400);
  color: #FFFFFF;
}
.nav-list a[aria-current="page"] .nav-idx { color: var(--gold-400); }

.header-foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(176, 138, 62, .3);
}
.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: rgba(245, 241, 232, .72);
}
.status-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold-400);
  box-shadow: 0 0 0 3px rgba(217, 182, 92, .18);
}
.header-cta { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------- 16. 页脚：牌谱索引页 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  color: rgba(245, 241, 232, .86);
  background-color: var(--green-900);
  background-image:
    radial-gradient(700px 320px at 88% 0%, rgba(217, 182, 92, .12), transparent 70%),
    repeating-linear-gradient(to right, rgba(217, 182, 92, .06) 0 1px, transparent 1px 72px);
  border-top: var(--line-hair);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 7px;
  background-image: repeating-linear-gradient(to right, rgba(217, 182, 92, .5) 0 1px, transparent 1px 24px);
}

.footer-inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(42px, 6vw, 74px) clamp(18px, 3.6vw, 44px) 26px;
  display: grid;
  grid-template-columns: minmax(230px, 1fr) 2.3fr;
  gap: clamp(26px, 4vw, 60px);
}

.footer-brand-line {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--paper);
}
.footer-brand-sub {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(217, 182, 92, .85);
}
.footer-note {
  margin-top: 18px;
  max-width: 36ch;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(245, 241, 232, .6);
}
.footer-meta { margin-top: 20px; display: flex; flex-direction: column; gap: 7px; }
.footer-meta li { display: flex; gap: 10px; align-items: baseline; }
.footer-meta-k {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gold-400);
}
.footer-meta-v {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(245, 241, 232, .78);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 36px);
}
.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--gold-400);
}
.footer-col li + li { margin-top: 9px; }
.footer-col a,
.footer-col span {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 241, 232, .78);
}
.footer-col a {
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.footer-col a:hover { color: var(--gold-400); border-bottom-color: currentColor; }
.footer-col a[aria-current="page"] { color: var(--gold-400); }

.footer-contact li { word-break: break-word; }
.footer-hours { display: inline-block; margin-top: 4px; font-family: var(--font-mono); font-size: 12px; color: rgba(245, 241, 232, .55); }

.footer-base {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 18px clamp(18px, 3.6vw, 44px) 34px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 22px;
  border-top: 1px solid rgba(176, 138, 62, .25);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(245, 241, 232, .55);
}
.footer-legal { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-legal a { color: rgba(245, 241, 232, .68); transition: color var(--ease); }
.footer-legal a:hover { color: var(--gold-400); }

/* ---------- 17. 显现（翻牌式淡入） ---------- */
.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--ease), transform var(--ease);
}
.has-reveal [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 18. 平板与手机 ---------- */
@media (max-width: 1080px) {
  .footer-inner { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  body { padding-left: 0; }

  .site-header {
    position: sticky;
    top: 0;
    left: auto;
    right: auto;
    bottom: auto;
    width: 100%;
    height: auto;
    display: block;
    padding: 12px 16px;
    border-right: 0;
    border-bottom: var(--line-hair);
    background-image: radial-gradient(130% 220% at 100% 0%, rgba(217, 182, 92, .18), transparent 62%);
  }
  .header-rail { display: none; }
  .header-top { flex-direction: row; align-items: center; justify-content: space-between; gap: 12px; }
  .nav-toggle { display: inline-flex; }
  .brand-sub { font-size: 10px; }

  .site-nav { display: none; }
  .header-foot { display: none; }
  .site-header[data-open="true"] .site-nav {
    display: flex;
    flex-direction: column;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid rgba(176, 138, 62, .3);
    max-height: min(58vh, 420px);
    overflow-y: auto;
  }
  .site-header[data-open="true"] .header-foot {
    display: flex;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid rgba(176, 138, 62, .3);
  }
  .nav-list a { padding: 11px 10px; font-size: 16px; }

  .col-4, .col-5, .col-6, .col-7, .col-8 { grid-column: span 12; }

  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
  .footer-base { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .footer-cols { grid-template-columns: 1fr; }
  .header-cta .btn { flex: 1 1 auto; }
}

/* ---------- 19. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .has-reveal [data-reveal] { opacity: 1 !important; transform: none !important; }
  .card:hover, .card:focus-within, .btn:hover, .nav-list a:hover { transform: none; }
}