/* ============================================================
   胜天国际中心 · 共享样式表  /assets/site.css
   深空蓝画布 · 赤金编号 · 冷青数据 · 铜橙行动
   ============================================================ */

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

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

body { margin: 0; }

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

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

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

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

h1, h2, h3, h4, h5, h6, p, figure, blockquote { margin: 0; }

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

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 品牌色 */
  --deep-space: #0A1B30;
  --night-blue: #061223;
  --star-blue: #14314F;
  --cold-white: #F5F8FB;
  --mist-gray: #93A6BC;
  --red-gold: #C8A24A;
  --copper-orange: #C4692B;
  --cold-cyan: #34D1DA;
  --jade-green: #56E0B8;
  --graphite: #0C0F14;

  /* 浅色分区专用墨色 */
  --gold-ink: #8A6A1E;
  --copper-ink: #A8521F;

  /* 文本 */
  --text: #F5F8FB;
  --text-soft: rgba(245, 248, 251, 0.70);
  --text-faint: rgba(245, 248, 251, 0.48);
  --ink: #0C0F14;
  --ink-soft: rgba(12, 15, 20, 0.68);

  /* 边界 */
  --line: rgba(147, 166, 188, 0.22);
  --line-strong: rgba(147, 166, 188, 0.38);
  --line-hair: rgba(147, 166, 188, 0.12);

  /* 尺度 */
  --frame: 1240px;
  --gutter: clamp(18px, 4vw, 56px);
  --radius-lg: 26px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --display-jumbo: clamp(2.4rem, 10.5vw, 8.4rem);

  /* 字体 */
  --font-display: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-float: 0 24px 60px -30px rgba(6, 18, 35, 0.95);
}

/* ---------- 3. 页面画布 ---------- */
body {
  background-color: var(--deep-space);
  color: var(--text);
  font-family: var(--font-body);
  font-size: clamp(16px, 1.05vw, 17.5px);
  line-height: 1.85;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(147, 166, 188, 0.05) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(0deg, rgba(147, 166, 188, 0.032) 0 1px, transparent 1px 76px),
    radial-gradient(900px 560px at 84% -10%, rgba(52, 209, 218, 0.10), transparent 64%),
    radial-gradient(760px 520px at 4% 4%, rgba(200, 162, 74, 0.09), transparent 62%);
}

.site-header,
.site-footer,
main { position: relative; z-index: 1; }

::selection { background: rgba(200, 162, 74, 0.35); color: #FFFFFF; }

:focus-visible {
  outline: 2px solid var(--cold-cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

h2[id], h3[id], section[id], div[id] { scroll-margin-top: 120px; }

/* ---------- 4. 排版基元 ---------- */
.wrap {
  width: 100%;
  max-width: calc(var(--frame) + var(--gutter) * 2);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section { padding: clamp(56px, 9vw, 124px) 0; }

.section-head { max-width: 72ch; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--red-gold);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, var(--red-gold), transparent);
}

.display {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: var(--display-jumbo);
  line-height: 1.02;
  letter-spacing: 0.06em;
  color: var(--cold-white);
  text-indent: 0.06em;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.5rem, 3.4vw, 2.6rem);
  line-height: 1.22;
  letter-spacing: 0.02em;
  color: var(--cold-white);
  margin: 0.35em 0 0.6em;
}

.lede {
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.9;
  color: var(--text-soft);
  max-width: 64ch;
}

.text-soft { color: var(--text-soft); }

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

/* ---------- 5. 分割与装饰 ---------- */
.divider {
  height: 1px;
  margin: clamp(28px, 4vw, 52px) 0;
  background: linear-gradient(90deg, rgba(200, 162, 74, 0.55), rgba(147, 166, 188, 0.18) 42%, transparent);
}

.ticks {
  display: block;
  width: 100%;
  height: 12px;
  background-image: repeating-linear-gradient(90deg, rgba(147, 166, 188, 0.40) 0 1px, transparent 1px 14px);
  opacity: 0.7;
}

.float-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: rgba(10, 27, 48, 0.9);
  border: 1px solid rgba(200, 162, 74, 0.35);
  color: var(--red-gold);
  backdrop-filter: blur(6px);
}

/* ---------- 6. 分区与卡片 ---------- */
.panel {
  background: var(--star-blue);
  border: 1px solid var(--line-hair);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 34px);
}

.panel-flat {
  background: rgba(20, 49, 79, 0.42);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 34px);
}

.band-light {
  background: var(--cold-white);
  color: var(--ink);
}

.band-light .lede,
.band-light .text-soft { color: var(--ink-soft); }

.band-light .section-title,
.band-light .display { color: var(--graphite); }

.band-light .eyebrow { color: var(--gold-ink); }

.band-light .eyebrow::before { background: linear-gradient(90deg, var(--gold-ink), transparent); }

.band-light .divider { background: linear-gradient(90deg, rgba(138, 106, 30, 0.5), rgba(12, 15, 20, 0.14) 42%, transparent); }

.band-light .ticks { background-image: repeating-linear-gradient(90deg, rgba(12, 15, 20, 0.28) 0 1px, transparent 1px 14px); }

.band-light .float-label {
  background: rgba(12, 15, 20, 0.06);
  border-color: rgba(138, 106, 30, 0.35);
  color: var(--gold-ink);
}

/* ---------- 7. 标签与数据 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(52, 209, 218, 0.10);
  border: 1px solid rgba(52, 209, 218, 0.28);
  color: var(--cold-cyan);
}

.tag-gold {
  background: rgba(200, 162, 74, 0.12);
  border-color: rgba(200, 162, 74, 0.30);
  color: var(--red-gold);
}

.tag-jade {
  background: rgba(86, 224, 184, 0.12);
  border-color: rgba(86, 224, 184, 0.30);
  color: var(--jade-green);
}

.data-figure {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--cold-cyan);
}

.data-label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist-gray);
}

/* ---------- 8. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 34px);
}

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

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

.grid-aside { grid-template-columns: minmax(0, 1.75fr) minmax(0, 0.9fr); }

/* ---------- 9. 编辑部目录模块 ---------- */
.index-list {
  border-top: 1px solid var(--line);
}

.index-row {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr) minmax(0, 0.9fr);
  align-items: baseline;
  gap: clamp(12px, 2vw, 30px);
  padding: clamp(16px, 2.2vw, 24px) 0;
  border-bottom: 1px solid var(--line-hair);
  transition: background-color 0.3s var(--ease), padding-left 0.3s var(--ease);
}

.index-row:hover {
  background: rgba(20, 49, 79, 0.4);
  padding-left: 12px;
}

.index-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--red-gold);
}

.index-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  letter-spacing: 0.03em;
  color: var(--cold-white);
}

.index-note {
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--text-faint);
  transition: color 0.3s var(--ease);
}

.index-row:hover .index-note { color: var(--text-soft); }

/* ---------- 10. 媒体容器 ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--star-blue);
  background-image:
    repeating-linear-gradient(90deg, rgba(147, 166, 188, 0.10) 0 1px, transparent 1px 22px),
    linear-gradient(140deg, rgba(52, 209, 218, 0.10), rgba(6, 18, 35, 0.6));
}

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

.media-16x9 { aspect-ratio: 16 / 9; }
.media-4x3 { aspect-ratio: 4 / 3; }
.media-1x1 { aspect-ratio: 1 / 1; }
.media-3x4 { aspect-ratio: 3 / 4; }

.media-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--mist-gray);
}

/* ---------- 11. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 0.92rem;
  letter-spacing: 0.1em;
  line-height: 1.2;
  cursor: pointer;
  transition: transform 0.3s var(--ease), background-color 0.3s var(--ease), border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.btn-primary {
  background: linear-gradient(135deg, var(--copper-orange), var(--copper-ink));
  color: #FFF3E6;
  box-shadow: 0 0 0 1px rgba(196, 105, 43, 0.45), 0 14px 34px -18px rgba(196, 105, 43, 0.95);
}

.btn-primary:hover { transform: translateY(-2px); }

.btn-ghost {
  background: rgba(20, 49, 79, 0.35);
  border-color: var(--line-strong);
  color: var(--cold-white);
}

.btn-ghost:hover {
  border-color: var(--cold-cyan);
  color: var(--cold-cyan);
}

.btn-gold {
  background: var(--red-gold);
  color: var(--graphite);
}

.btn-gold:hover { transform: translateY(-2px); }

/* ---------- 12. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(20px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--mist-gray);
}

.breadcrumb a {
  color: var(--mist-gray);
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.breadcrumb a:hover {
  color: var(--cold-cyan);
  border-bottom-color: var(--cold-cyan);
}

.breadcrumb-sep { color: rgba(147, 166, 188, 0.5); }

/* ---------- 13. Skip link ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: -120px;
  transform: translateX(-50%);
  z-index: 130;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  background: var(--red-gold);
  color: var(--graphite);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  white-space: nowrap;
  transition: top 0.25s var(--ease);
}

.skip-link:focus { top: 12px; }

/* ---------- 14. 头部刊头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: linear-gradient(180deg, rgba(10, 27, 48, 0.97), rgba(10, 27, 48, 0.88));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.35s var(--ease);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(200, 162, 74, 0.55), transparent);
}

.header-frame {
  position: relative;
  width: 100%;
  max-width: calc(var(--frame) + var(--gutter) * 2);
  margin: 0 auto;
  padding: 14px var(--gutter) 0;
  display: grid;
  grid-template-columns: 1fr auto auto;
  grid-template-areas:
    "index cta toggle"
    "brand brand brand"
    "nav nav nav";
  align-items: center;
  column-gap: clamp(10px, 2vw, 18px);
}

.header-index {
  grid-area: index;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mist-gray);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-index-tick {
  flex: 0 0 auto;
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, var(--red-gold), transparent);
}

.cta-consult {
  grid-area: cta;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--copper-orange), var(--copper-ink));
  color: #FFF3E6;
  font-size: 0.86rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
  box-shadow: 0 0 0 1px rgba(196, 105, 43, 0.45), 0 12px 30px -16px rgba(196, 105, 43, 0.95);
  transition: transform 0.3s var(--ease);
}

.cta-consult::after {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cold-cyan);
}

.cta-consult:hover { transform: translateY(-2px); }

.nav-toggle {
  grid-area: toggle;
  justify-self: end;
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  background: rgba(20, 49, 79, 0.8);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  cursor: pointer;
}

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

.nav-toggle-icon > span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--red-gold);
  transition: transform 0.3s var(--ease), opacity 0.25s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon > span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon > span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon > span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.brand {
  grid-area: brand;
  display: block;
  text-align: center;
  padding: 14px 0 18px;
  transition: padding 0.3s var(--ease);
}

.brand-mark {
  display: block;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.1rem, 8.4vw, 4.6rem);
  line-height: 1;
  letter-spacing: 0.16em;
  text-indent: 0.16em;
  color: var(--cold-white);
}

.brand-subline {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: clamp(0.66rem, 1.6vw, 0.8rem);
  letter-spacing: 0.3em;
  text-indent: 0.3em;
  color: var(--red-gold);
}

.site-nav {
  grid-area: nav;
  border-top: 1px solid var(--line);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(4px, 2vw, 26px);
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 14px 6px;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--text-soft);
  transition: color 0.25s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 6px;
  right: 6px;
  bottom: 8px;
  height: 1px;
  background: var(--cold-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease);
}

.nav-link:hover { color: var(--cold-white); }

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

.nav-index {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  color: var(--mist-gray);
}

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

.nav-link[aria-current="page"] .nav-index { color: var(--copper-orange); }

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

.header-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--red-gold), var(--cold-cyan));
  transition: width 0.12s linear;
}

/* ---------- 15. 页脚 ---------- */
.site-footer {
  margin-top: clamp(60px, 9vw, 140px);
  background: var(--night-blue);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  display: block;
  height: 14px;
  opacity: 0.7;
  background-image: repeating-linear-gradient(90deg, rgba(147, 166, 188, 0.35) 0 1px, transparent 1px 16px);
}

.footer-frame {
  width: 100%;
  max-width: calc(var(--frame) + var(--gutter) * 2);
  margin: 0 auto;
  padding: clamp(44px, 7vw, 84px) var(--gutter) clamp(26px, 4vw, 42px);
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1.4fr);
  gap: clamp(28px, 4vw, 52px);
}

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

.footer-mark {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.1;
  letter-spacing: 0.14em;
  color: var(--cold-white);
}

.footer-subline {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--red-gold);
}

.footer-note {
  margin-top: 16px;
  max-width: 40ch;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--text-faint);
}

.footer-ticks {
  display: block;
  width: min(240px, 100%);
  height: 12px;
  margin-top: 22px;
  opacity: 0.6;
  background-image: repeating-linear-gradient(90deg, rgba(147, 166, 188, 0.4) 0 1px, transparent 1px 14px);
}

.footer-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--mist-gray);
  padding-bottom: 14px;
}

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

.footer-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 0.94rem;
  color: rgba(245, 248, 251, 0.72);
  transition: color 0.25s var(--ease);
}

.footer-list a::before {
  content: "";
  width: 0;
  height: 1px;
  background: var(--red-gold);
  transition: width 0.25s var(--ease);
}

.footer-list a:hover { color: var(--cold-white); }

.footer-list a:hover::before { width: 14px; }

.footer-list-plain li {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid var(--line-hair);
}

.footer-list-plain li:first-child { border-top: 0; }

.footer-key {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--mist-gray);
  padding-top: 4px;
}

.footer-value {
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(245, 248, 251, 0.82);
  word-break: break-word;
}

.footer-legal {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  line-height: 1.9;
  color: var(--mist-gray);
}

.footer-legal-item { margin: 0; }

.footer-legal-item:last-child { color: rgba(147, 166, 188, 0.75); }

/* ---------- 16. 显现动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

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

/* ---------- 17. 平板 ---------- */
@media (max-width: 1080px) {
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-aside { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); }
  .footer-frame { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); }
  .footer-contact { grid-column: 1 / -1; }
}

/* ---------- 18. 移动端 ---------- */
@media (max-width: 899px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.42s var(--ease), opacity 0.3s var(--ease);
  }

  .site-nav[data-open] {
    max-height: min(72vh, 520px);
    opacity: 1;
    overflow-y: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 16px;
  }

  .nav-item { width: 100%; }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 15px 4px;
    font-size: 1rem;
    border-bottom: 1px solid var(--line-hair);
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    background: rgba(200, 162, 74, 0.08);
    padding-left: 12px;
  }

  .brand-mark { letter-spacing: 0.12em; text-indent: 0.12em; }

  .grid-2,
  .grid-3,
  .grid-aside { grid-template-columns: minmax(0, 1fr); }

  .index-row {
    grid-template-columns: 56px minmax(0, 1fr);
    row-gap: 6px;
  }

  .index-note { grid-column: 2 / -1; }

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

  .footer-contact,
  .footer-legal { grid-column: 1 / -1; }

  .footer-list-plain li { grid-template-columns: minmax(0, 1fr); gap: 2px; }

  .footer-key { padding-top: 0; }
}

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

@media (max-width: 420px) {
  .cta-consult { padding: 9px 14px; font-size: 0.8rem; letter-spacing: 0.06em; }
  .nav-toggle { padding: 9px 13px; }
}

/* ---------- 19. 桌面端收窄报头 ---------- */
@media (min-width: 900px) {
  .site-header[data-collapsed] .header-frame {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "brand nav cta";
    padding-top: 10px;
    padding-bottom: 10px;
    column-gap: clamp(16px, 3vw, 40px);
  }

  .site-header[data-collapsed] .header-index { display: none; }

  .site-header[data-collapsed] .brand { text-align: left; padding: 0; }

  .site-header[data-collapsed] .brand-mark {
    font-size: 1.02rem;
    letter-spacing: 0.18em;
    text-indent: 0.18em;
  }

  .site-header[data-collapsed] .brand-subline { display: none; }

  .site-header[data-collapsed] .site-nav {
    border-top: 0;
    min-width: 0;
  }

  .site-header[data-collapsed] .nav-list {
    justify-content: flex-end;
    flex-wrap: nowrap;
  }

  .site-header[data-collapsed] .nav-link {
    padding: 8px 4px;
    font-size: 0.86rem;
  }

  .site-header[data-collapsed] .nav-link::after { bottom: 2px; }

  .site-header[data-collapsed] .cta-consult {
    padding: 8px 16px;
    font-size: 0.8rem;
  }
}

/* ---------- 20. 减弱动效 ---------- */
@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;
  }

  .reveal,
  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }

  .header-progress { transition: none; }
}