/* =========================================================
   /assets/site.css — 尊龙中心 共享外壳与基础组件
   ========================================================= */

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

html, body { margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

p, figure, blockquote { margin: 0; }

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

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

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.012em;
}

/* ---------- 2. 变量 ---------- */
:root {
  --indigo: #14213D;
  --indigo-deep: #0C1428;
  --gold: #C9A45C;
  --gold-light: #E8D39A;
  --cream: #F5F0E6;
  --rock: #8E9499;
  --rock-ink: #5E666C;
  --ochre: #A34D3F;
  --turquoise: #2E7D74;
  --moss: #61705B;
  --ink: #10151F;

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

  --shell: 1240px;
  --gutter: clamp(18px, 4vw, 44px);
  --header-h: 74px;
  --chamfer: 14px;
  --hairline: 1px solid rgba(201, 164, 92, 0.32);
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

/* ---------- 3. 可访问性基础 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--gold);
  color: var(--indigo-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  border-radius: 2px;
  transform: translateY(-160%);
  transition: transform 0.18s var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

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

#main-content {
  scroll-margin-top: calc(var(--header-h) + 12px);
}

/* ---------- 4. 容器与骨架 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 30px);
}

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

.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
}

@media (min-width: 900px) {
  .split--5-7 { grid-template-columns: 5fr 7fr; }
  .split--7-5 { grid-template-columns: 7fr 5fr; }
  .split--4-8 { grid-template-columns: 4fr 8fr; }
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, var(--gold), rgba(201, 164, 92, 0.1));
}

.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.12em;
}

.num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--ochre);
}

/* ---------- 5. 经幡彩带 ---------- */
.flag-strip {
  height: 4px;
  width: 100%;
  background:
    linear-gradient(90deg,
      var(--turquoise) 0 16%,
      var(--gold) 16% 36%,
      var(--ochre) 36% 54%,
      var(--moss) 54% 68%,
      var(--indigo) 68% 100%);
}

.site-footer .flag-strip {
  background:
    linear-gradient(90deg,
      var(--turquoise) 0 16%,
      var(--gold) 16% 36%,
      var(--ochre) 36% 54%,
      var(--moss) 54% 68%,
      #26355C 68% 100%);
}

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  color: var(--cream);
  background: linear-gradient(180deg,
      rgba(12, 20, 40, 0.92) 0%,
      rgba(20, 33, 61, 0.62) 62%,
      rgba(20, 33, 61, 0) 100%);
  border-bottom: 1px solid transparent;
  transition: background-color 0.2s var(--ease),
              border-color 0.2s var(--ease),
              box-shadow 0.2s var(--ease);
}

.site-header[data-scrolled] {
  background-color: var(--indigo);
  background-image: none;
  border-bottom-color: rgba(201, 164, 92, 0.4);
  box-shadow: 0 14px 34px -22px rgba(12, 20, 40, 0.95);
}

.header-shell {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
  min-height: var(--header-h);
  padding-block: 8px;
  position: relative;
  z-index: 3;
}

/* 品牌 */
.brand {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 6px 0;
  color: var(--cream);
  flex: 0 0 auto;
}

.brand-mark {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: 0.08em;
  line-height: 1.1;
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.34em;
  color: var(--gold-light);
  line-height: 1.5;
}

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.nav-kicker { display: none; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: rgba(245, 240, 230, 0.82);
  transition: color 0.18s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 8px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.24s var(--ease);
}

.nav-link:hover { color: var(--cream); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--gold-light);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--gold-light);
}

.nav-cta { display: none; }

/* 工具区 */
.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 8px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
  width: 52px;
  min-height: 44px;
  padding: 8px 6px;
  border: 1px solid rgba(232, 211, 154, 0.5);
  border-radius: 2px;
  color: var(--gold-light);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--gold);
  background: rgba(201, 164, 92, 0.12);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 1px;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.nav-toggle-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  line-height: 1;
}

.site-header[data-open] .nav-toggle-bar:first-child {
  transform: translateY(3px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-bar:nth-child(2) {
  transform: translateY(-3px) rotate(-45deg);
}

/* 遮罩 */
.nav-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1;
  background: rgba(12, 20, 40, 0.62);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s var(--ease);
}

/* 阅读进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gold), var(--ochre) 70%, var(--turquoise));
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}

.site-header[data-scrolled] .scroll-progress { opacity: 1; }

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 22px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.3;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: background-color 0.18s var(--ease),
              color 0.18s var(--ease),
              border-color 0.18s var(--ease);
}

.btn--sm {
  min-height: 40px;
  padding: 9px 16px;
  font-size: 13.5px;
  letter-spacing: 0.06em;
}

.btn-gold {
  background: var(--gold);
  color: var(--indigo-deep);
  border-color: var(--gold);
  font-weight: 600;
}

.btn-gold:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
}

.btn-ghost {
  background: transparent;
  color: var(--cream);
  border-color: rgba(232, 211, 154, 0.55);
}

.btn-ghost:hover {
  background: var(--gold);
  color: var(--indigo-deep);
  border-color: var(--gold);
}

.btn-outline {
  background: transparent;
  color: var(--indigo);
  border-color: rgba(20, 33, 61, 0.32);
}

.btn-outline:hover {
  border-color: var(--ochre);
  color: var(--ochre);
  background: rgba(163, 77, 63, 0.05);
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--indigo-deep);
  color: rgba(245, 240, 230, 0.78);
  margin-top: clamp(56px, 8vw, 104px);
}

.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(115deg,
      rgba(201, 164, 92, 0.055) 0 1px,
      transparent 1px 22px);
}

.footer-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.15fr 1.55fr 0.9fr 0.9fr;
  gap: clamp(24px, 3vw, 48px);
  padding-block: clamp(40px, 6vw, 76px) clamp(28px, 4vw, 48px);
  align-items: start;
}

.footer-col { min-width: 0; }

.footer-title {
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--gold-light);
  margin-bottom: 16px;
}

.footer-brand {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 24px;
  letter-spacing: 0.06em;
  color: var(--cream);
  line-height: 1.3;
}

.footer-tagline {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--gold);
}

.footer-note {
  margin-top: 18px;
  max-width: 30ch;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(245, 240, 230, 0.66);
}

/* 联系锚点栏 */
.footer-col--contact {
  position: relative;
  background: var(--cream);
  color: var(--ink);
  padding: 24px 22px 22px;
  border: 1px solid rgba(201, 164, 92, 0.62);
  border-radius: 2px;
  box-shadow: 0 22px 40px -34px rgba(0, 0, 0, 0.9);
}

.footer-col--contact::before {
  content: "";
  position: absolute;
  top: 8px;
  right: 8px;
  width: 18px;
  height: 18px;
  border-top: 1px solid var(--ochre);
  border-right: 1px solid var(--ochre);
}

.footer-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--ochre);
  margin-bottom: 16px;
}

.contact-list {
  display: grid;
  gap: 12px;
}

.contact-item {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(20, 33, 61, 0.1);
}

.contact-item:last-child { border-bottom: 0; padding-bottom: 0; }

.contact-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--rock-ink);
  line-height: 2;
}

.contact-value {
  font-size: 14.5px;
  line-height: 1.7;
  word-break: break-word;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 44px;
  padding: 7px 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
  text-align: left;
  word-break: break-all;
  border-bottom: 1px dashed rgba(20, 33, 61, 0.35);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.copy-btn:hover {
  color: var(--ochre);
  border-bottom-color: var(--ochre);
}

.copy-btn[data-copied] {
  color: var(--turquoise);
  border-bottom-color: var(--turquoise);
}

.copy-btn[data-copied]::after {
  content: "已复制";
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--turquoise);
}

.contact-note {
  margin-top: 16px;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--rock-ink);
}

.footer-cta { margin-top: 18px; }

/* 链接列 */
.footer-link-list {
  display: grid;
  gap: 4px;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 4px 0;
  font-size: 14.5px;
  color: rgba(245, 240, 230, 0.72);
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}

.footer-link::before {
  content: "";
  width: 12px;
  height: 1px;
  margin-right: 10px;
  background: var(--gold);
  opacity: 0.5;
  transition: width 0.18s var(--ease), opacity 0.18s var(--ease);
}

.footer-link:hover {
  color: var(--gold-light);
}

.footer-link:hover::before {
  width: 22px;
  opacity: 1;
}

.footer-icp {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(142, 148, 153, 0.95);
}

.footer-base {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 18px 24px;
  border-top: 1px solid rgba(232, 211, 154, 0.18);
}

.footer-copy,
.footer-legal {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(245, 240, 230, 0.55);
}

.footer-legal {
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
}

/* ---------- 9. 正文与页面基础组件 ---------- */
.page-main {
  display: block;
}

.breadcrumb {
  padding-block: 18px 0;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--rock-ink);
}

.breadcrumb-list > li::after {
  content: "/";
  margin-left: 8px;
  color: rgba(201, 164, 92, 0.8);
}

.breadcrumb-list > li:last-child::after { content: ""; }

.breadcrumb-link {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  color: var(--rock-ink);
  transition: color 0.18s var(--ease);
}

.breadcrumb-link:hover { color: var(--ochre); }

.breadcrumb-current {
  color: var(--indigo);
  font-weight: 500;
}

.section {
  padding-block: clamp(40px, 6vw, 88px);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 24px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--ochre);
}

.lede {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.7;
  color: var(--indigo);
}

.prose {
  max-width: 72ch;
  font-size: 17px;
  line-height: 1.82;
  color: var(--ink);
}

.prose p + p { margin-top: 1.1em; }

.prose h2 {
  font-size: clamp(24px, 2.6vw, 34px);
  margin: 2em 0 0.6em;
  color: var(--indigo);
}

.prose h3 {
  font-size: clamp(19px, 2vw, 24px);
  margin: 1.7em 0 0.5em;
  color: var(--indigo);
}

.prose ul,
.prose ol {
  margin: 1em 0;
  padding-left: 1.2em;
  list-style: disc;
}

.prose li + li { margin-top: 0.4em; }

.prose a {
  color: var(--turquoise);
  border-bottom: 1px solid rgba(46, 125, 116, 0.4);
}

.prose a:hover { border-bottom-color: var(--turquoise); }

.prose strong { font-weight: 700; color: var(--indigo); }

/* 面板 */
.panel {
  position: relative;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(20, 33, 61, 0.14);
  border-radius: 2px;
  padding: clamp(18px, 2.4vw, 28px);
}

.panel--chamfer {
  clip-path: polygon(0 0,
      calc(100% - var(--chamfer)) 0,
      100% var(--chamfer),
      100% 100%,
      0 100%);
  border-radius: 0;
}

.panel--framed {
  background: var(--indigo);
  border-color: rgba(201, 164, 92, 0.5);
  color: var(--cream);
}

.panel--framed .panel-title,
.panel--framed .panel-kicker { color: var(--gold-light); }

.panel--framed .panel-body { color: rgba(245, 240, 230, 0.76); }

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--ochre);
}

.panel-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 800;
  color: var(--indigo);
  line-height: 1.35;
}

.panel-body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock-ink);
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  line-height: 1.8;
  color: var(--indigo);
  border: 1px solid rgba(20, 33, 61, 0.24);
  border-radius: 1px;
}

.tag--ochre { color: var(--ochre); border-color: rgba(163, 77, 63, 0.5); }
.tag--turquoise { color: var(--turquoise); border-color: rgba(46, 125, 116, 0.5); }
.tag--moss { color: var(--moss); border-color: rgba(97, 112, 91, 0.5); }

/* 筛选 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(18px, 2.4vw, 28px);
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 9px 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--indigo);
  background: transparent;
  border: 1px solid rgba(20, 33, 61, 0.24);
  border-radius: 1px;
  cursor: pointer;
  transition: background-color 0.18s var(--ease),
              color 0.18s var(--ease),
              border-color 0.18s var(--ease);
}

.filter-btn:hover {
  border-color: var(--gold);
  color: var(--ochre);
}

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

/* 图片容器 */
.media {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border-radius: 2px;
  background: var(--indigo);
  aspect-ratio: 16 / 9;
}

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

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    repeating-linear-gradient(115deg,
      rgba(201, 164, 92, 0.16) 0 1px,
      transparent 1px 16px),
    radial-gradient(120% 90% at 18% 8%, rgba(46, 125, 116, 0.5), transparent 62%),
    radial-gradient(95% 80% at 88% 92%, rgba(163, 77, 63, 0.42), transparent 68%),
    linear-gradient(160deg, #1B2B4D 0%, #0C1428 100%);
}

.media > img {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.82;
  filter: saturate(0.85) contrast(0.95) brightness(0.96);
}

.media-frame {
  position: relative;
  padding: 10px;
  border: 1px solid rgba(201, 164, 92, 0.42);
  border-radius: 2px;
}

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--rock-ink);
}

/* 显现动画 */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

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

/* ---------- 10. 移动端 / 平板 ---------- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-col--contact {
    grid-column: 1 / -1;
    order: -1;
  }
}

@media (max-width: 900px) {
  :root { --header-h: 64px; }

  .nav-scrim {
    display: block;
    opacity: 0;
  }

  .site-header[data-open] .nav-scrim {
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 4;
    width: min(344px, 86vw);
    margin-left: 0;
    padding: calc(var(--header-h) + 22px) 24px 32px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 18px;
    background: var(--indigo-deep);
    border-left: 1px solid rgba(201, 164, 92, 0.34);
    overflow-y: auto;
    transform: translateX(102%);
    visibility: hidden;
    transition: transform 0.28s var(--ease), visibility 0.28s var(--ease);
  }

  .site-header[data-open] .site-nav {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-kicker {
    display: block;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.28em;
    color: var(--gold);
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(232, 211, 154, 0.22);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    min-height: 48px;
    padding: 4px 0;
    font-family: var(--font-serif);
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: rgba(245, 240, 230, 0.86);
    border-bottom: 1px solid rgba(245, 240, 230, 0.08);
  }

  .nav-link::after {
    left: 0;
    right: auto;
    bottom: 10px;
    width: 26px;
  }

  .nav-link[aria-current="page"] { color: var(--gold-light); }

  .nav-cta {
    display: inline-flex;
    margin-top: 4px;
    width: 100%;
  }

  .header-cta { display: none; }

  .nav-toggle { display: flex; }

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

  .brand-mark { font-size: 19px; }
  .brand-tagline { font-size: 9px; letter-spacing: 0.28em; }
}

@media (max-width: 640px) {
  body { font-size: 16px; line-height: 1.75; }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-col--contact { order: -1; }

  .footer-base {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .contact-item {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .btn,
  .filter-btn,
  .copy-btn,
  .footer-link { min-height: 44px; }
}

/* ---------- 11. 减少动效 ---------- */
@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;
  }

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

  .site-nav {
    transition: none;
  }
}