/* ============================================================
   皇冠体彩官网 · 共享 Site Kit
   文件位置：/assets/site.css
   结构：设计令牌 → 重置 → 基础排版 → 通用组件 → 页头框架 → 页脚 → 响应式
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --ink: #0B1F3A;
  --ink-2: #102A4C;
  --gold: #D4AF37;
  --gold-soft: #E9C766;
  --orange: #E8873A;
  --teal: #17C3B2;
  --violet: #6B5BFF;
  --ivory: #F6F1E6;
  --sand: #E6E1D6;
  --char: #1F2937;
  --gray: #5B6577;
  --white: #FFFFFF;

  --hairline: rgba(11, 31, 58, 0.14);
  --hairline-dark: rgba(212, 175, 55, 0.32);
  --on-ink: rgba(246, 241, 230, 0.72);
  --on-ink-strong: rgba(246, 241, 230, 0.9);

  --font-head: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;

  --rail: 76px;
  --bar: 64px;
  --maxw: 1200px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 2. 重置 ---------- */
*,
*::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 { 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%; }

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--char);
  background: var(--ivory);
  padding-left: var(--rail);
  padding-top: var(--bar);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.16;
  color: var(--ink);
}

h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); font-weight: 900; }
h2 { font-size: clamp(1.8rem, 3vw, 3.2rem); }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.5rem); }

p { max-width: 68ch; }

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

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

#main-content:focus { outline: 0; }

/* ---------- 4. 通用工具 ---------- */
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

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

.rule {
  height: 1px;
  border: 0;
  margin: clamp(24px, 3vw, 40px) 0;
  background: var(--hairline);
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(18px, 3vw, 40px);
}

.section { padding: clamp(48px, 7vw, 96px) 0; }
.section--tight { padding: clamp(30px, 4vw, 56px) 0; }
.section--sand { background: var(--sand); }
.section--ink { background: var(--ink); color: var(--on-ink); }
.section--ink .section-title,
.section--ink .card-title { color: var(--white); }
.section--ink .section-lede,
.section--ink .card-meta { color: var(--on-ink); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gray);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
}
.section--ink .eyebrow { color: var(--gold-soft); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding-top: 18px;
  margin-bottom: clamp(24px, 3vw, 40px);
  border-top: 1px solid var(--hairline);
}
.section--ink .section-head { border-top-color: var(--hairline-dark); }

.section-num {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--gray);
}
.section-num::before {
  content: "";
  width: 7px; height: 7px;
  background: var(--gold);
}
.section--ink .section-num { color: var(--gold-soft); }

.section-title { font-size: clamp(1.8rem, 3vw, 3.2rem); }

.section-lede {
  max-width: 62ch;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0.82rem 1.5rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: transform 0.16s var(--ease), background 0.16s var(--ease),
    color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.btn--gold {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}
.btn--gold:hover {
  background: var(--gold-soft);
  border-color: var(--gold-soft);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(246, 241, 230, 0.42);
  color: var(--on-ink-strong);
}
.btn--ghost:hover {
  border-color: var(--gold);
  color: var(--gold-soft);
  transform: translateY(-2px);
}

.btn--line {
  background: transparent;
  border-color: var(--hairline);
  color: var(--ink);
}
.btn--line:hover {
  border-color: var(--gold);
  background: rgba(212, 175, 55, 0.1);
  transform: translateY(-2px);
}

/* ---------- 6. 面包屑 ---------- */
.breadcrumb { margin: 0 0 clamp(20px, 3vw, 32px); }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--gray);
}
.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 10px;
}
.breadcrumb-list li + li::before {
  content: "/";
  color: rgba(31, 41, 55, 0.34);
}
.breadcrumb-list a {
  color: var(--gray);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.breadcrumb-list a:hover {
  color: var(--ink);
  border-bottom-color: var(--gold);
}
.breadcrumb-list [aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 7. 网格与档案卡 ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
}
.grid--halves { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.archive-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--white);
  border: 1px solid var(--hairline);
  padding: clamp(18px, 2.2vw, 26px);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease),
    box-shadow 0.18s var(--ease);
}
.archive-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 3px; height: 0;
  background: var(--gold);
  transition: height 0.22s var(--ease);
}
.archive-card:hover,
.archive-card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(212, 175, 55, 0.62);
  box-shadow: 0 16px 34px -26px rgba(11, 31, 58, 0.6);
}
.archive-card:hover::before,
.archive-card:focus-within::before { height: 100%; }
.archive-card:focus-within { border-color: var(--teal); }

.card-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--gray);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.card-meta {
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--gray);
}

.card-metric {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.02em;
}
/* 金色数字仅在深色分区使用，保证对比 */
.card-metric--gold { color: var(--gold); }

/* ---------- 8. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  background: var(--ivory);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--gray);
}
.tag--gold {
  background: rgba(212, 175, 55, 0.16);
  border-color: rgba(212, 175, 55, 0.55);
  color: #6f5a12;
}
.tag--orange {
  background: rgba(232, 135, 58, 0.14);
  border-color: rgba(232, 135, 58, 0.5);
  color: #91470f;
}
.tag--teal {
  background: rgba(23, 195, 178, 0.14);
  border-color: rgba(23, 195, 178, 0.5);
  color: #0a6157;
}
.tag--violet {
  background: rgba(107, 91, 255, 0.12);
  border-color: rgba(107, 91, 255, 0.42);
  color: #3f34a4;
}

/* ---------- 9. 图片容器（页面阶段放置占位图） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: var(--ratio, 16 / 9);
  border: 1px solid var(--hairline);
  background:
    linear-gradient(135deg, var(--ink) 0%, var(--ink-2) 52%, #2a2110 100%);
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(115deg, rgba(212, 175, 55, 0.34), transparent 58%),
    repeating-linear-gradient(90deg, rgba(246, 241, 230, 0.08) 0 1px, transparent 1px 48px);
  pointer-events: none;
}
.media-frame > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--square { --ratio: 1 / 1; }
.media-frame--tall { --ratio: 3 / 4; }

/* ---------- 10. 页头框架 ---------- */
.site-header {
  position: relative;
  z-index: 90;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 0.55rem 1rem;
  background: var(--gold);
  color: var(--ink);
  font-weight: 700;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform 0.18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

.header-bar {
  position: fixed;
  top: 0;
  left: var(--rail);
  right: 0;
  z-index: 80;
  height: var(--bar);
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 0 clamp(16px, 2.4vw, 32px);
  background: var(--ink);
  color: var(--on-ink-strong);
  border-bottom: 1px solid var(--hairline-dark);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding: 6px 0;
}
.brand-mark {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--gold);
  transform: rotate(45deg);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--gold);
}
.brand:hover .brand-mark {
  border-color: var(--gold-soft);
  transform: rotate(45deg) scale(1.08);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
}
.brand-name {
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--white);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.22em;
  color: var(--gold-soft);
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 6px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: rgba(246, 241, 230, 0.6);
}
.header-meta .mono {
  margin: 0 0.35em;
  color: var(--gold-soft);
}

.header-utility {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.util-link {
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: rgba(246, 241, 230, 0.68);
  transition: color 0.16s var(--ease), background 0.16s var(--ease),
    border-color 0.16s var(--ease);
}
.util-link:hover {
  color: var(--ink);
  background: var(--gold-soft);
  border-color: var(--gold-soft);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(212, 175, 55, 0.45);
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.03);
  transition: border-color 0.16s var(--ease), background 0.16s var(--ease);
}
.nav-toggle:hover { border-color: var(--gold); background: rgba(212, 175, 55, 0.12); }

.nav-toggle-lines {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--gold);
  transition: background 0.18s var(--ease);
}
.nav-toggle-lines::before,
.nav-toggle-lines::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--gold);
  transition: transform 0.2s var(--ease);
}
.nav-toggle-lines::before { top: -6px; }
.nav-toggle-lines::after { top: 6px; }

.site-header[data-open="true"] .nav-toggle-lines { background: transparent; }
.site-header[data-open="true"] .nav-toggle-lines::before { transform: translateY(6px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle-lines::after { transform: translateY(-6px) rotate(-45deg); }

/* 左侧竖排索引导航：页面书脊 */
.frame-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 70;
  width: var(--rail);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 0 18px;
  background: var(--ink);
  border-right: 1px solid var(--hairline-dark);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
}
.frame-nav::-webkit-scrollbar { display: none; }

.rail-mark {
  flex: none;
  width: 100%;
  height: var(--bar);
  display: grid;
  place-items: center;
  border-bottom: 1px solid var(--hairline-dark);
}
.rail-mark::before {
  content: "";
  width: 14px;
  height: 14px;
  border: 2px solid var(--gold);
  transform: rotate(45deg);
}

.frame-nav-label {
  writing-mode: vertical-rl;
  text-orientation: upright;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.34em;
  color: rgba(246, 241, 230, 0.38);
}

.frame-nav-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
  margin: 16px 0;
  padding: 0 6px;
}

.nav-link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 4px;
  border-radius: 2px;
  color: rgba(246, 241, 230, 0.66);
  transition: color 0.18s var(--ease), background 0.18s var(--ease);
}
.nav-link:hover {
  color: var(--white);
  background: rgba(246, 241, 230, 0.06);
}

.nav-num {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: rgba(212, 175, 55, 0.6);
  transition: color 0.18s var(--ease);
}

.nav-label {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  line-height: 1;
}

.nav-link[aria-current="page"] {
  color: var(--gold);
  background: rgba(212, 175, 55, 0.1);
}
.nav-link[aria-current="page"] .nav-num { color: var(--gold); }
.nav-link[aria-current="page"] .nav-num::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 5px;
  vertical-align: middle;
  background: var(--gold);
  border-radius: 50%;
}
.nav-link[aria-current="page"] .nav-label { font-weight: 700; }

.rail-percent {
  margin-top: auto;
  padding-top: 14px;
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: rgba(246, 241, 230, 0.38);
}

/* 阅读进度 */
.progress-track {
  position: fixed;
  top: calc(var(--bar) - 2px);
  left: var(--rail);
  right: 0;
  height: 2px;
  z-index: 81;
  background: rgba(246, 241, 230, 0.1);
  pointer-events: none;
}
.progress-fill {
  display: block;
  height: 100%;
  width: 0;
  background: var(--gold);
  box-shadow: 0 0 8px rgba(212, 175, 55, 0.55);
}

/* 遮罩 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 65;
  background: rgba(11, 31, 58, 0.62);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s var(--ease);
}
.site-header[data-open="true"] .nav-scrim {
  opacity: 1;
  pointer-events: auto;
}

/* 返回顶部 */
.to-top {
  position: fixed;
  right: clamp(14px, 2vw, 24px);
  bottom: clamp(14px, 2vw, 24px);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.7rem 1rem;
  border: 1px solid var(--hairline-dark);
  border-radius: 2px;
  background: var(--ink);
  color: var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease),
    visibility 0.2s, background 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}
.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.to-top:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

/* ---------- 11. 页脚封底 ---------- */
.site-footer {
  position: relative;
  background: var(--ink);
  color: var(--on-ink);
  border-top: 1px solid var(--hairline-dark);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(212, 175, 55, 0) 62%);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.6fr;
  gap: clamp(24px, 4vw, 56px);
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(48px, 6vw, 80px) clamp(18px, 3vw, 40px) clamp(28px, 4vw, 44px);
}

.footer-mark {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1.2;
  color: var(--white);
  max-width: none;
}
.footer-sub {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--gold-soft);
}
.footer-note {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(246, 241, 230, 0.66);
}

.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--gold-soft);
}

.footer-list li + li { margin-top: 10px; }
.footer-list a {
  display: inline-block;
  font-size: 0.95rem;
  color: rgba(246, 241, 230, 0.8);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.footer-list a:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--gold);
}

.contact-list li + li { margin-top: 12px; }
.contact-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: 0.86rem;
  line-height: 1.7;
}
.contact-label {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: rgba(246, 241, 230, 0.48);
  white-space: nowrap;
}
.contact-value {
  color: rgba(246, 241, 230, 0.88);
  word-break: break-word;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 22px clamp(18px, 3vw, 40px) clamp(28px, 4vw, 40px);
  border-top: 1px solid rgba(212, 175, 55, 0.2);
}

.legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  font-size: 0.84rem;
}
.legal-links a {
  color: rgba(246, 241, 230, 0.66);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.legal-links a:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--gold);
}

.footer-reg {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: rgba(246, 241, 230, 0.5);
  max-width: none;
}

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1080px) {
  .header-meta { display: none; }
}

@media (max-width: 900px) {
  :root {
    --rail: 0px;
    --bar: 58px;
  }

  body { padding-left: 0; }

  .grid--halves,
  .grid--thirds { grid-template-columns: 1fr; }

  .header-bar { gap: 12px; }

  .nav-toggle { display: inline-flex; }

  .frame-nav {
    z-index: 75;
    width: min(82vw, 320px);
    padding: calc(var(--bar) + 10px) 0 28px;
    border-right: 1px solid var(--gold);
    transform: translateX(-101%);
    transition: transform 0.28s var(--ease);
    box-shadow: 24px 0 60px -30px rgba(0, 0, 0, 0.7);
  }
  .site-header[data-open="true"] .frame-nav { transform: none; }

  .rail-mark { display: none; }

  .frame-nav-label {
    writing-mode: horizontal-tb;
    align-self: flex-start;
    margin: 0 0 6px;
    padding-left: 24px;
    letter-spacing: 0.3em;
  }

  .frame-nav-list {
    align-items: stretch;
    gap: 0;
    margin: 10px 0 0;
    padding: 0 14px;
  }

  .nav-link {
    flex-direction: row;
    justify-content: flex-start;
    gap: 14px;
    padding: 15px 10px;
    border-bottom: 1px solid rgba(246, 241, 230, 0.08);
    border-radius: 0;
  }
  .nav-label {
    writing-mode: horizontal-tb;
    font-size: 1rem;
    letter-spacing: 0.08em;
  }
  .nav-num {
    width: 24px;
    font-size: 0.72rem;
  }
  .nav-link[aria-current="page"] { background: rgba(212, 175, 55, 0.14); }

  .rail-percent { display: none; }

  .nav-scrim { display: block; }

  .footer-inner { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-contact { grid-column: 1 / -1; }

  html.nav-open,
  html.nav-open body { overflow: hidden; }
}

@media (min-width: 901px) {
  .nav-scrim { display: none; }
}

@media (max-width: 720px) {
  .util-link { display: none; }
}

@media (max-width: 640px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-legal {
    flex-direction: column;
    align-items: flex-start;
  }
  .contact-row { grid-template-columns: 1fr; gap: 2px; }
  .to-top { font-size: 0.68rem; padding: 0.6rem 0.85rem; }
}

/* ---------- 13. 减少动态 ---------- */
@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;
  }
  .archive-card:hover,
  .archive-card:focus-within,
  .btn:hover { transform: none; }
  .to-top { transform: none; }
}