/* ============================================================
   九洲平台 · 共享样式 /assets/site.css
   山径导览式视觉系统：等高线、路径线、里程标签
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

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

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

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

button, input, select, textarea { font: inherit; color: inherit; }

button {
  background: none;
  border: 0;
  cursor: pointer;
}

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

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

/* ---------- 2. Tokens ---------- */
:root {
  --ochre: #A6402A;
  --ochre-deep: #7C2D1C;
  --ink: #26302F;
  --slate: #4A5757;
  --mist: #6E8798;
  --paper: #F7F4EE;
  --fog: #E4EAE8;
  --line: #C9D3D0;
  --amber: #B07C18;
  --amber-deep: #8A5B00;
  --teal-600: #15635C;
  --teal-400: #4C9C8F;
  --teal-200: #BFDCD6;
  --focus: #0B6E62;

  --wrap: 1240px;
  --gutter: clamp(18px, 4vw, 40px);
  --ease: cubic-bezier(0.2, 0, 0, 1);
  --band-y: clamp(40px, 6vw, 80px);

  --sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system,
          "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "Noto Sans Mono CJK SC", ui-monospace,
          SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
}

/* ---------- 3. 中文排版基底 ---------- */
body {
  background: var(--paper);
  color: var(--slate);
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 900;
  font-stretch: condensed;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

h1 {
  font-size: clamp(2rem, 5.4vw, 4.6rem);
  line-height: 1.02;
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.5rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h3 {
  font-size: clamp(1.15rem, 1.6vw, 1.4rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.28;
}

p { max-width: 34em; }

strong { color: var(--ink); font-weight: 700; }

::selection {
  background: rgba(166, 64, 42, 0.2);
  color: var(--ink);
}

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

/* ---------- 4. 通用文字组件 ---------- */
.mono {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ochre);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--ochre);
}

.lede {
  font-size: clamp(1.02rem, 1.4vw, 1.2rem);
  line-height: 1.72;
  color: var(--slate);
  max-width: 38ch;
}

.prose {
  max-width: 720px;
  font-size: 17px;
  line-height: 1.78;
  color: var(--slate);
}

.prose > * + * { margin-top: 1em; }
.prose h3 { margin-top: 1.8em; }
.prose ul { list-style: none; }
.prose ul > li {
  position: relative;
  padding-left: 18px;
}
.prose ul > li + li { margin-top: 0.4em; }
.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--ochre);
}

.mile-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
}

.mile-bar__dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--ochre);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.section-head__title {
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1.12;
}

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

.site-main { padding-top: clamp(88px, 11vw, 116px); }

.band {
  padding-block: var(--band-y);
}

.band--fog { background: var(--fog); }

.band--ink {
  background: var(--ink);
  color: #DCE5E3;
}

.band--ink h2,
.band--ink h3 { color: #F4F8F6; }

.band--ink .lede,
.band--ink .prose { color: #C9D6D3; }

.grid {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
}

.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.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-full { grid-column: 1 / -1; }

.stack {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.6vw, 20px);
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-align: center;
  background: transparent;
  color: var(--ink);
  transition: background-color 0.18s var(--ease),
              color 0.18s var(--ease),
              border-color 0.18s var(--ease),
              transform 0.18s var(--ease);
}

.btn--primary {
  background: var(--ochre);
  border-color: var(--ochre);
  color: #FFF7F2;
}

.btn--primary:hover {
  background: var(--ochre-deep);
  border-color: var(--ochre-deep);
}

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

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

.btn--ghost:hover {
  border-color: var(--teal-600);
  color: var(--teal-600);
  background: rgba(191, 220, 214, 0.28);
}

.btn--amber {
  background: transparent;
  border-color: var(--amber);
  color: var(--amber-deep);
}

.btn--amber:hover { background: rgba(176, 124, 24, 0.12); }

.btn--sm {
  min-height: 36px;
  padding: 0 14px;
  font-size: 13.5px;
}

.btn--nav {
  min-height: 40px;
  padding: 0 18px;
  border-radius: 999px;
  font-size: 14px;
}

/* ---------- 7. 卡片与标签 ---------- */
.card {
  padding: clamp(16px, 2vw, 24px);
  background: #FFFDF9;
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}

.card--link {
  display: block;
  height: 100%;
}

.card--link:hover,
.card--link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--slate);
}

.card__meta {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
  text-transform: uppercase;
}

.card__title {
  margin-top: 8px;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.32;
  color: var(--ink);
}

.card__text {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.6;
  background: var(--teal-200);
  color: var(--teal-600);
}

.tag--teal {
  background: rgba(21, 99, 92, 0.1);
  color: var(--teal-600);
  border: 1px solid rgba(21, 99, 92, 0.22);
}

.tag--ochre {
  background: rgba(166, 64, 42, 0.1);
  color: var(--ochre-deep);
  border: 1px solid rgba(166, 64, 42, 0.28);
}

.tag--amber {
  background: rgba(176, 124, 24, 0.14);
  color: var(--amber-deep);
  border: 1px solid rgba(176, 124, 24, 0.42);
}

/* ---------- 8. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.breadcrumbs a { transition: color 0.16s var(--ease); }
.breadcrumbs a:hover { color: var(--ochre); }

.breadcrumbs__sep {
  color: var(--line);
  font-family: var(--mono);
  font-size: 11.5px;
}

/* ---------- 9. 图片容器 ---------- */
.figure { margin: 0; }

.figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 2px;
  background-color: var(--fog);
}

.figure__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure__frame--empty {
  background-image:
    repeating-radial-gradient(circle at 18% 118%,
      rgba(38, 48, 47, 0.10) 0 1px, transparent 1px 34px),
    repeating-radial-gradient(circle at 88% -12%,
      rgba(21, 99, 92, 0.14) 0 1px, transparent 1px 26px);
}

.figure__caption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.figure--wide .figure__frame { aspect-ratio: 16 / 9; }
.figure--tall .figure__frame { aspect-ratio: 4 / 5; }
.figure--band .figure__frame { aspect-ratio: 21 / 9; }
.figure--square .figure__frame { aspect-ratio: 1 / 1; }

/* ---------- 10. 标签页 ---------- */
.tabs { display: block; }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: clamp(16px, 2.4vw, 26px);
  border-bottom: 1px solid var(--line);
}

.tab {
  min-height: 42px;
  margin-bottom: -1px;
  padding: 0 16px;
  border-bottom: 2px solid transparent;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--mist);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.tab:hover { color: var(--ink); }

.tab[aria-selected="true"] {
  color: var(--ink);
  border-bottom-color: var(--ochre);
}

.tab-panel { animation: tab-in 0.18s var(--ease); }
.tab-panel[hidden] { display: none; }

@keyframes tab-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 11. 入场 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}

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

/* ---------- 12. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 120;
  padding: 10px 16px;
  border-radius: 2px;
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transform: translateY(-160%);
  transition: transform 0.18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

/* ---------- 13. 头部 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 80;
  padding: 14px var(--gutter) 0;
  pointer-events: none;
}

.site-header .nav-shell,
.site-header .skip-link,
.site-header .route-progress { pointer-events: auto; }

.nav-shell {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  border: 1px solid transparent;
  border-radius: 999px;
  background: rgba(247, 244, 238, 0.62);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  backdrop-filter: blur(10px) saturate(120%);
  transition: background-color 0.2s var(--ease),
              border-color 0.2s var(--ease),
              box-shadow 0.2s var(--ease);
}

.site-header[data-scrolled="true"] .nav-shell {
  background: var(--paper);
  border-color: var(--line);
  box-shadow: 0 10px 30px -22px rgba(38, 48, 47, 0.65);
}

.nav-shell__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  min-height: 62px;
  padding: 8px 10px 8px 18px;
  transition: min-height 0.2s var(--ease);
}

.site-header[data-scrolled="true"] .nav-shell__inner { min-height: 54px; }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  min-width: 0;
}

.brand-mark {
  position: relative;
  width: 26px;
  height: 26px;
  flex: none;
  border-radius: 50%;
  background: var(--ochre);
}

.brand-mark__ring {
  position: absolute;
  inset: 5px;
  border: 1.5px solid var(--paper);
  border-radius: 50%;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 50%;
  background: var(--paper);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.brand-name {
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--ink);
  white-space: nowrap;
}

.brand-sub {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  line-height: 1.2;
  color: var(--mist);
  white-space: nowrap;
}

/* 导航 */
.site-nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0px, 0.6vw, 8px);
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--slate);
  transition: color 0.16s var(--ease), background-color 0.16s var(--ease);
}

.site-nav__link:hover {
  color: var(--ink);
  background: rgba(201, 211, 208, 0.42);
}

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

.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 5px;
  height: 2px;
  border-radius: 2px;
  background: var(--ochre);
}

/* 头部动作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink);
  transition: border-color 0.16s var(--ease), background-color 0.16s var(--ease);
}

.nav-toggle:hover { border-color: var(--ink); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.18s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child {
  transform: translateY(2.75px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

.nav-toggle__text { line-height: 1; }

/* 滚动进度尺 */
.route-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 90;
  background: transparent;
}

.route-progress__fill {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--ochre), var(--amber));
  transition: transform 0.18s linear;
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--ink);
  color: #DCE5E3;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.16;
  background-image:
    repeating-radial-gradient(circle at 10% 128%,
      transparent 0 33px, rgba(191, 220, 214, 0.55) 33px 34px),
    repeating-radial-gradient(circle at 96% -20%,
      transparent 0 27px, rgba(76, 156, 143, 0.5) 27px 28px);
}

.footer-wrap {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) var(--gutter) 26px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(230px, 1.1fr) minmax(0, 1.75fr) minmax(230px, 0.95fr);
  gap: clamp(24px, 4vw, 56px);
}

.brand--footer { color: #F2F6F4; }
.brand--footer .brand-name { color: #F2F6F4; }
.brand--footer .brand-sub { color: var(--teal-400); }

.footer-lead__line {
  margin-top: 16px;
  max-width: 30ch;
  font-size: 15px;
  line-height: 1.8;
  color: #C6D2CF;
}

.footer-mile {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--teal-400);
}

.footer-mile__node { flex: none; }

.footer-mile__rail {
  flex: 1 1 18px;
  height: 1px;
  background: rgba(191, 220, 214, 0.3);
}

.footer-map {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: #9FB3AF;
  text-transform: uppercase;
}

.footer-col__title::before {
  content: "";
  width: 10px;
  height: 2px;
  background: var(--ochre);
}

.footer-list li + li { margin-top: 9px; }

.footer-list__link {
  font-size: 14.5px;
  line-height: 1.6;
  color: #D9E2E0;
  transition: color 0.16s var(--ease);
}

.footer-list__link:hover {
  color: #FFFFFF;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-contact__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(201, 211, 208, 0.16);
}

.footer-contact__item--block {
  align-items: flex-start;
  flex-wrap: wrap;
}

.footer-contact__label {
  flex: none;
  min-width: 34px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: #93A8A4;
}

.footer-contact__value {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: #E7EEEC;
  word-break: break-word;
}

.copy-btn {
  flex: none;
  min-height: 26px;
  padding: 2px 10px;
  border: 1px solid rgba(176, 124, 24, 0.55);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--amber);
  background: transparent;
  transition: background-color 0.16s var(--ease),
              color 0.16s var(--ease),
              border-color 0.16s var(--ease);
}

.copy-btn:hover {
  background: rgba(176, 124, 24, 0.18);
  color: #F0D59A;
}

.copy-btn[data-copied="true"] {
  background: var(--amber);
  border-color: var(--amber);
  color: #16110A;
}

.footer-contact__note {
  margin-top: 12px;
  max-width: 32em;
  font-size: 12.5px;
  line-height: 1.7;
  color: #8FA4A0;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid rgba(201, 211, 208, 0.18);
  font-size: 12.5px;
  color: #93A8A4;
}

.footer-legal__meta {
  max-width: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.footer-legal__meta .mono { font-size: 11.5px; color: #A9BCB8; }

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.footer-legal__links a { transition: color 0.16s var(--ease); }
.footer-legal__links a:hover { color: #FFFFFF; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr); }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 980px) {
  .col-3, .col-4, .col-5 { grid-column: span 6; }
  .col-6, .col-7, .col-8 { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  .site-header { padding: 10px var(--gutter) 0; }

  .nav-shell__inner {
    min-height: 56px;
    padding: 8px 10px 8px 14px;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    z-index: 10;
    max-height: min(72vh, 540px);
    overflow-y: auto;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--paper);
    box-shadow: 0 20px 44px -26px rgba(38, 48, 47, 0.7);
  }

  .site-nav[data-open="true"] {
    display: block;
    animation: nav-in 0.18s var(--ease);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    height: 46px;
    padding: 0 14px;
    border-radius: 10px;
    font-size: 15.5px;
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(166, 64, 42, 0.08);
  }

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

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

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

@keyframes nav-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  html { scroll-padding-top: 84px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-contact { grid-column: auto; }
  .footer-map { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 24px; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8 { grid-column: 1 / -1; }
  .btn--nav { min-height: 38px; padding: 0 13px; font-size: 13px; }
  .nav-toggle { padding: 0 11px; }
  .nav-toggle__text { display: none; }
  .brand-sub { display: none; }
  .footer-map { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 16. 减少动态效果 ---------- */
@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;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .route-progress__fill { transition: none !important; }
  .tab-panel { animation: none !important; }
  .site-nav[data-open="true"] { animation: none !important; }
}