/* ============ Seed tokens（星空沉浸·深蓝品牌锚点） ============ */
  :root {
    --seed-bg: #eef4fb;
    --seed-fg: #14243d;
    --seed-primary: #1d5ff0;
    --seed-accent: #0b9be0;
    --seed-surface: #ffffff;
    --seed-radius: 14px;
    --seed-on-primary: #ffffff;
    --seed-danger: #ff9db0;
    --seed-danger-line: #e0596f;

    /* derived layers */
    --bg: var(--seed-bg);
    --fg: var(--seed-fg);
    --muted: color-mix(in srgb, var(--seed-fg) 80%, var(--seed-bg));
    --faint: color-mix(in srgb, var(--seed-fg) 62%, var(--seed-bg));
    --surface: color-mix(in srgb, var(--seed-fg) 4%, var(--seed-surface));
    --surface-raised: color-mix(in srgb, var(--seed-fg) 7%, var(--seed-surface));
    --border: color-mix(in srgb, var(--seed-fg) 12%, transparent);
    --border-soft: color-mix(in srgb, var(--seed-fg) 7%, transparent);
    --primary: var(--seed-primary);
    --primary-ink: color-mix(in srgb, var(--seed-primary) 55%, var(--seed-fg));
    --primary-dim: color-mix(in srgb, var(--seed-primary) 16%, transparent);
    --accent: var(--seed-accent);
    --on-primary: var(--seed-on-primary);
    --danger: var(--seed-danger);
    --danger-line: var(--seed-danger-line);
    --glow-a: color-mix(in srgb, var(--seed-primary) 26%, transparent);
    --glow-b: color-mix(in srgb, var(--seed-accent) 14%, transparent);
    --r-sm: calc(var(--seed-radius) * 0.5);
    --r-md: var(--seed-radius);
    --r-lg: calc(var(--seed-radius) * 1.6);
    --maxw: 1200px;
    --section-pad: clamp(64px, 9vw, 112px);
    --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 84px; }
  body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--fg);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  ::selection { background: var(--primary-dim); color: var(--fg); }
  a { color: inherit; text-decoration: none; }
  img, svg { display: block; }
  ul { list-style: none; }
  button { font-family: inherit; cursor: pointer; }

  .wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(20px, 4vw, 40px); }

  /* ============ 顶部导航 ============ */
  .nav {
    position: fixed; inset: 0 0 auto 0; z-index: 60;
    transition: background .35s ease, border-color .35s ease, backdrop-filter .35s ease;
    border-bottom: 1px solid transparent;
  }
  .nav.scrolled {
    background: color-mix(in srgb, var(--seed-bg) 78%, transparent);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom-color: var(--border-soft);
  }
  .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
  .brand { display: flex; align-items: center; gap: 11px; }
  .brand-mark { height: 36px; width: auto; }
  .brand-name { font-size: 19.5px; font-weight: 600; letter-spacing: 0.02em; }
  .foot-brand .brand-mark { height: 46px; }
  .nav-links { display: flex; align-items: center; gap: 30px; flex-wrap: nowrap; }
  .nav-links a { position: relative; display: inline-flex; align-items: center; font-size: 14.5px; font-weight: 500; color: var(--muted); transition: color .2s ease; }
  .nav-links a::after { content: ""; position: absolute; left: 50%; right: 50%; bottom: -4px; height: 2px; border-radius: 2px; background: var(--primary); opacity: 0; transition: left .25s ease, right .25s ease, opacity .2s ease; }
  .nav-links a:hover, .nav-links a.active { color: var(--primary-ink); }
  .nav-links a:hover::after, .nav-links a.active::after { left: 2px; right: 2px; opacity: 1; }
  .nav-links a.active { font-weight: 600; }
  .nav-cta {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 9px 18px; border-radius: 999px; font-size: 14px; font-weight: 600; letter-spacing: 0.02em;
    color: var(--fg); border: 1px solid color-mix(in srgb, var(--primary) 60%, transparent);
    background: linear-gradient(180deg, color-mix(in srgb, var(--primary) 34%, transparent), color-mix(in srgb, var(--primary) 16%, transparent));
    transition: border-color .2s ease, transform .2s ease;
  }
  .nav-cta:hover { border-color: var(--primary); transform: translateY(-1px); }
  .menu-btn { display: none; width: 40px; height: 40px; border: 1px solid var(--border); border-radius: var(--r-sm); background: transparent; color: var(--fg); align-items: center; justify-content: center; }

  /* 溢出折叠：JS 检测到导航放不下时加 .nav-collapsed，收为下拉 */
  .nav.nav-collapsed .nav-links { display: none; }
  .nav.nav-collapsed .menu-btn { display: inline-flex; }
  .nav.nav-collapsed.open .nav-links {
    display: flex; flex-direction: column; align-items: flex-start; gap: 4px;
    position: absolute; top: 72px; left: 0; right: 0; padding: 14px clamp(20px, 4vw, 40px) 22px;
    background: color-mix(in srgb, var(--seed-bg) 94%, transparent);
    -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-soft);
  }
  .nav.nav-collapsed.open .nav-links a { padding: 11px 0; width: 100%; font-size: 16px; }
  .nav.nav-collapsed.open .nav-links a::after { display: none; }
  .nav.nav-collapsed.open .nav-links a.active { color: var(--primary); font-weight: 600; }
  .nav.nav-collapsed.open .nav-links .nav-cta { display: inline-flex; width: auto; margin-top: 10px; }

  /* ============ Hero ============ */
  .hero { position: relative; padding: calc(72px + clamp(72px, 12vh, 128px)) 0 clamp(80px, 12vh, 136px); overflow: hidden; }
  #starfield { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
  .hero::after { /* 底部融入下一板块的深空渐隐 */
    content: ""; position: absolute; inset: auto 0 0 0; height: 160px; z-index: 1;
    background: linear-gradient(to bottom, transparent, var(--bg));
    pointer-events: none;
  }
  .hero-glow {
    position: absolute; z-index: 0; border-radius: 50%; filter: blur(90px); pointer-events: none;
  }
  .hero-glow.g1 { width: 640px; height: 640px; top: -220px; left: 50%; transform: translateX(-70%); background: var(--glow-a); }
  .hero-glow.g2 { width: 520px; height: 520px; bottom: -260px; right: -120px; background: var(--glow-b); }
  .hero-inner { position: relative; z-index: 2; text-align: center; max-width: 880px; margin: 0 auto; }
  .hero-logo { margin-bottom: 30px; }
  .hero-logo img { height: clamp(72px, 9vw, 108px); width: auto; margin: 0 auto; filter: drop-shadow(0 8px 34px color-mix(in srgb, var(--primary) 42%, transparent)); }
  .hero-badge {
    display: inline-flex; align-items: center; gap: 8px; margin-bottom: 28px;
    padding: 7px 16px; border-radius: 999px; font-size: 13px; font-weight: 500; letter-spacing: 0.02em;
    color: var(--muted); border: 1px solid var(--border); background: color-mix(in srgb, var(--seed-fg) 3%, transparent);
  }
  .hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
  .hero h1 {
    font-size: clamp(34px, 5.2vw, 58px); font-weight: 600; line-height: 1.18; letter-spacing: -0.02em;
  }
  .hero h1 .lit { color: var(--primary-ink); }
  .hero-sub { margin: 24px auto 0; max-width: 640px; font-size: clamp(16px, 1.6vw, 18.5px); color: var(--muted); line-height: 1.75; }
  .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 9px;
    padding: 14px 30px; border-radius: 999px; font-size: 15.5px; font-weight: 600; letter-spacing: 0.02em;
    border: 1px solid transparent; transition: transform .2s ease, border-color .2s ease, background .2s ease;
  }
  .btn[hidden] { display: none; }
  .btn-primary {
    color: var(--on-primary);
    background: linear-gradient(180deg, color-mix(in srgb, var(--primary) 92%, white), var(--primary));
    box-shadow: 0 8px 32px color-mix(in srgb, var(--primary) 38%, transparent);
  }
  .btn-primary:hover { transform: translateY(-2px); }
  .btn-ghost { color: var(--fg); border-color: var(--border); background: color-mix(in srgb, var(--seed-fg) 4%, transparent); }
  .btn-ghost:hover { border-color: color-mix(in srgb, var(--seed-fg) 30%, transparent); transform: translateY(-2px); }
  .btn svg { width: 16px; height: 16px; }
  .hero-stats { margin-top: 64px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border-soft); border: 1px solid var(--border-soft); border-radius: var(--r-md); overflow: hidden; }
  .hero-stat { background: color-mix(in srgb, var(--seed-bg) 72%, var(--seed-surface)); padding: 22px 12px; }
  .hero-stat b { display: block; font-size: 22px; font-weight: 600; letter-spacing: -0.01em; }
  .hero-stat span { font-size: 13px; color: var(--faint); letter-spacing: 0.02em; }

  /* ============ 通用板块 ============ */
  section { position: relative; }
  .sec { padding: var(--section-pad) 0; }
  .sec.alt { background: color-mix(in srgb, var(--primary) 6%, var(--bg)); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
  .sec.paper { background: var(--surface); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
  .sec.paper .card { background: color-mix(in srgb, var(--seed-bg) 45%, var(--seed-surface)); }
  /* 板块标题（全媒风格：衬线大标题 + 小字拼音行 + 细线强调段） */
  .sec-head { position: relative; display: flex; flex-direction: column; align-items: stretch; margin-bottom: clamp(40px, 5vw, 60px); }
  .sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
  .sec-head h2 { order: 1; font-family: "Noto Serif SC", "Source Han Serif SC", "STZhongsong", "SimSun", serif; font-size: clamp(28px, 3.2vw, 34px); font-weight: 700; line-height: 1.3; letter-spacing: .04em; color: var(--fg); }
  .sec-head .eyebrow { order: 2; display: block; margin-top: 12px; margin-bottom: 0; font-size: 11.5px; font-weight: 600; letter-spacing: .22em; text-transform: uppercase; color: var(--primary-ink); }
  .sec-head .eyebrow::before, .sec-head.center .eyebrow::after { display: none; }
  .sec-head::before {
    content: ""; order: 3; display: block; margin-top: 16px; height: 5px;
    background:
      linear-gradient(var(--primary), var(--primary)) left top / 56px 4px no-repeat,
      linear-gradient(var(--border), var(--border)) center center / 100% 1px no-repeat;
  }
  .sec-head.center::before {
    background:
      linear-gradient(var(--primary), var(--primary)) center top / 56px 4px no-repeat,
      linear-gradient(var(--border), var(--border)) center center / 100% 1px no-repeat;
  }
  .sec-head p { order: 4; margin-top: 16px; font-size: 16.5px; color: var(--muted); line-height: 1.75; }

  .card {
    background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--r-md);
    transition: transform .25s ease, border-color .25s ease, background .25s ease;
  }
  .card:hover { transform: translateY(-4px); border-color: var(--border); background: var(--surface-raised); }

  /* ============ 关于我们 ============ */
  .about-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(32px, 5vw, 64px); align-items: start; }
  .about-copy p { color: var(--muted); font-size: 16.5px; line-height: 1.85; }
  .about-copy p + p { margin-top: 18px; }
  .about-copy strong { color: var(--fg); font-weight: 600; }
  .about-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
  .about-facts .fact:nth-child(3) { grid-column: 1 / -1; }
  .fact { padding: 22px 20px; }
  .fact b { display: block; font-size: 19px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 4px; }
  .fact span { font-size: 13px; color: var(--faint); }
  .about-motto { grid-column: 1 / -1; padding: 22px 24px; border-radius: var(--r-md); border: 1px solid var(--border-soft); background: linear-gradient(135deg, var(--primary-dim), transparent 65%); font-size: 14.5px; color: var(--muted); line-height: 1.7; }
  .about-motto b { color: var(--fg); font-weight: 600; }

  /* ============ 三方价值 ============ */
  .value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .value-card { padding: 34px 28px; position: relative; overflow: hidden; }
  .value-card .tag { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; font-weight: 600; letter-spacing: 0.06em; color: var(--primary-ink); margin-bottom: 18px; }
  .value-card .tag svg { width: 18px; height: 18px; }
  .value-card h3 { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 12px; }
  .value-card p { font-size: 14.8px; color: var(--muted); line-height: 1.75; }
  .value-card ul { margin-top: 16px; display: grid; gap: 9px; }
  .value-card li { font-size: 14px; color: var(--muted); display: flex; gap: 9px; align-items: flex-start; }
  .value-card li::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); flex: none; margin-top: 8px; }

  /* ============ 核心业务 ============ */
  .services-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .service { padding: 34px 32px; display: grid; grid-template-columns: 56px 1fr; gap: 22px; align-items: start; }
  .service-icon {
    width: 56px; height: 56px; border-radius: var(--r-sm); display: flex; align-items: center; justify-content: center;
    color: var(--primary-ink); border: 1px solid var(--border-soft);
    background: linear-gradient(160deg, var(--primary-dim), transparent 70%);
  }
  .service-icon svg { width: 26px; height: 26px; }
  .service h3 { font-size: 19px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 10px; }
  .service p { font-size: 14.8px; color: var(--muted); line-height: 1.75; }
  .service .no { position: absolute; }
  .service { position: relative; }
  .service .idx { position: absolute; top: 24px; right: 26px; font-size: 12px; font-weight: 600; letter-spacing: 0.08em; color: var(--faint); }

  /* ============ 资质荣誉 ============ */
  .qual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 56px; }
  .qual { padding: 30px 30px; display: flex; gap: 20px; align-items: flex-start; }
  .qual-icon { width: 46px; height: 46px; flex: none; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--accent); border: 1px solid var(--border-soft); background: color-mix(in srgb, var(--accent) 10%, transparent); }
  .qual-icon svg { width: 22px; height: 22px; }
  .qual h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
  .qual p { font-size: 14.3px; color: var(--muted); line-height: 1.7; }
  .qual .ph { display: inline-block; margin-top: 10px; font-size: 12px; letter-spacing: 0.02em; color: var(--faint); border: 1px dashed var(--border); border-radius: 999px; padding: 3px 10px; }

  /* ============ 新闻动态 ============ */
  .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .news { overflow: hidden; display: flex; flex-direction: column; }
  .news-visual { height: 148px; position: relative; background: linear-gradient(150deg, color-mix(in srgb, var(--primary) 22%, var(--seed-surface)), var(--seed-surface) 70%); border-bottom: 1px solid var(--border-soft); }
  .news-visual svg { position: absolute; inset: 0; width: 100%; height: 100%; color: var(--primary-ink); opacity: .5; }
  .news-visual img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
  .news-body { padding: 24px 24px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
  .news-meta { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--faint); letter-spacing: 0.02em; }
  .news-meta .demo { border: 1px solid var(--border); border-radius: 999px; padding: 2px 9px; font-size: 11px; }
  .news-meta .src { color: var(--primary-ink); border-color: color-mix(in srgb, var(--primary) 34%, transparent); }
  .news h3 a { color: inherit; transition: color .2s ease; }
  .news h3 a:hover { color: var(--primary-ink); }
  .news h3 { font-size: 16.5px; font-weight: 600; line-height: 1.5; letter-spacing: -0.005em; }
  .news p { font-size: 14px; color: var(--muted); line-height: 1.7; }
  .news a.more { margin-top: auto; font-size: 13.5px; font-weight: 500; color: var(--primary-ink); display: inline-flex; align-items: center; gap: 6px; }
  .news a.more svg { width: 13px; height: 13px; transition: transform .2s ease; }
  .news a.more:hover svg { transform: translateX(3px); }
  a.more svg { width: 14px; height: 14px; flex: none; }

  /* ============ 新闻分类筛选 ============ */
  .news-filter { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 18px; margin: -14px 0 28px; }
  .chips { display: flex; flex-wrap: wrap; gap: 10px; }
  .chips button {
    font: inherit; font-size: 13.5px; letter-spacing: .02em; color: var(--muted);
    background: var(--seed-surface); border: 1px solid var(--border); border-radius: 999px;
    padding: 7px 15px; cursor: pointer; display: inline-flex; align-items: center; gap: 7px;
    transition: color .2s ease, border-color .2s ease, background .2s ease;
  }
  .chips button i { font-style: normal; font-size: 11.5px; color: var(--faint); font-variant-numeric: tabular-nums; }
  .chips button:hover { border-color: color-mix(in srgb, var(--primary) 45%, transparent); color: var(--primary-ink); }
  .chips button.active { background: var(--primary); border-color: var(--primary); color: var(--on-primary); font-weight: 600; }
  .chips button.active i { color: color-mix(in srgb, var(--on-primary) 70%, transparent); }
  .chips button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
  .news-count { margin-left: auto; font-size: 12.5px; color: var(--faint); letter-spacing: .03em; font-variant-numeric: tabular-nums; }
  .news-count b { color: var(--primary-ink); font-weight: 600; }
  .news-empty { margin-top: 4px; padding: 34px 20px; text-align: center; font-size: 14.5px; color: var(--muted); border: 1px dashed var(--border); border-radius: var(--r-md); background: color-mix(in srgb, var(--seed-surface) 55%, transparent); }
  .news[hidden] { display: none; }
  .news-more-wrap { display: flex; justify-content: center; }
  .news-more { margin-top: clamp(26px, 3.5vw, 38px); min-width: 214px; justify-content: center; }
  .news-end { margin-top: clamp(26px, 3.5vw, 38px); font-size: 13px; color: var(--faint); letter-spacing: .05em; }

  /* ============ 媒体矩阵（公众号二维码） ============ */
  .qr-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .qr-card { padding: 26px 22px 24px; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 9px; }
  .qr-img { width: 168px; height: 169px; border-radius: var(--r-sm); overflow: hidden; border: 1px solid var(--border-soft); background: #fff; padding: 7px; }
  .qr-img img { display: block; width: 100%; height: 100%; object-fit: contain; }
  .qr-card h3 { font-size: 16.5px; font-weight: 600; letter-spacing: .01em; }
  .qr-tag { font-size: 11.5px; font-weight: 600; letter-spacing: .08em; color: var(--primary-ink); border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent); border-radius: 999px; padding: 2px 10px; }
  .qr-desc { font-size: 13px; line-height: 1.65; color: var(--muted); }
  @media (max-width: 1024px) { .qr-grid { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 480px) {
    .qr-grid { grid-template-columns: 1fr; }
    .news-filter { gap: 12px 14px; }
    .news-count { margin-left: 0; width: 100%; }
  }

  /* ============ 联系我们 ============ */
  .contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(28px, 4vw, 56px); align-items: stretch; }
  .contact-info { display: flex; flex-direction: column; gap: 16px; }
  .ci { padding: 24px 26px; display: flex; gap: 16px; align-items: flex-start; }
  .ci-icon { width: 40px; height: 40px; flex: none; border-radius: var(--r-sm); display: flex; align-items: center; justify-content: center; color: var(--primary-ink); border: 1px solid var(--border-soft); background: color-mix(in srgb, var(--primary) 8%, transparent); }
  .ci-icon svg { width: 19px; height: 19px; }
  .ci b { display: block; font-size: 14.5px; font-weight: 600; margin-bottom: 4px; }
  .ci span { font-size: 14px; color: var(--muted); line-height: 1.65; }
  .ci .ph { color: var(--faint); font-size: 12px; }
  .contact-form { padding: clamp(26px, 3vw, 38px); }
  .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .field { margin-bottom: 18px; }
  .field label { display: block; font-size: 13.5px; font-weight: 500; letter-spacing: 0.02em; color: var(--muted); margin-bottom: 8px; }
  .field label .req { color: var(--accent); }
  .field input, .field select, .field textarea {
    width: 100%; padding: 12px 14px; font-size: 15px; font-family: inherit; color: var(--fg);
    background: color-mix(in srgb, var(--seed-bg) 55%, var(--seed-surface));
    border: 1px solid var(--border); border-radius: var(--r-sm); outline: none;
    transition: border-color .2s ease, box-shadow .2s ease;
    appearance: none; -webkit-appearance: none;
  }
  .field textarea { min-height: 108px; resize: vertical; line-height: 1.6; }
  .field select { background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238a97ab' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 38px; }
  .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-dim); }
  .field input::placeholder, .field textarea::placeholder { color: var(--faint); }
  .field .err { display: none; margin-top: 6px; font-size: 12.5px; color: var(--danger); letter-spacing: 0.01em; }
  .field.invalid input, .field.invalid select, .field.invalid textarea { border-color: var(--danger-line); }
  .field.invalid .err { display: block; }
  .form-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 6px; }
  .form-note { font-size: 12.5px; color: var(--faint); max-width: 320px; }
  .form-success { display: none; text-align: center; padding: 48px 20px; }
  .form-success svg { width: 52px; height: 52px; color: var(--accent); margin: 0 auto 18px; }
  .form-success h3 { font-size: 19px; font-weight: 600; margin-bottom: 8px; }
  .form-success p { font-size: 14.5px; color: var(--muted); }
  .contact-form.done form { display: none; }
  .contact-form.done .form-success { display: block; }

  /* ============ 页脚CTA带 + 页脚 ============ */
  .cta-band { position: relative; overflow: hidden; border-radius: var(--r-lg); border: 1px solid var(--border-soft); background: linear-gradient(120deg, color-mix(in srgb, var(--primary) 20%, var(--seed-surface)), var(--seed-surface) 55%, color-mix(in srgb, var(--accent) 10%, var(--seed-surface))); padding: clamp(40px, 6vw, 64px) clamp(28px, 5vw, 64px); text-align: center; }
  .cta-band h2 { font-size: clamp(22px, 3vw, 32px); font-weight: 600; letter-spacing: -0.015em; }
  .cta-band p { margin: 14px auto 30px; max-width: 560px; font-size: 15.5px; color: var(--muted); }
  footer.site { margin-top: 0; border-top: 1px solid var(--border-soft); padding: clamp(26px, 3.5vw, 40px) 0 24px; background: color-mix(in srgb, var(--seed-bg) 78%, var(--seed-primary) 22%); }
  .foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 26px; }
  .foot-brand p { margin-top: 14px; font-size: 13.5px; color: var(--muted); line-height: 1.8; max-width: 360px; }
  .foot-col h4 { font-size: 13.5px; font-weight: 600; letter-spacing: 0.06em; color: var(--fg); margin-bottom: 14px; }
  .foot-col a, .foot-col span { display: block; font-size: 13.5px; color: var(--muted); margin-bottom: 10px; transition: color .2s ease; }
  .foot-col a:hover { color: var(--primary-ink); }
  .foot-base { border-top: 1px solid var(--border-soft); padding-top: 18px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); letter-spacing: 0.01em; }

  /* 手机端底部快捷导航（桌面端不显示） */
  .xl-tabbar { display: none; }

  /* ============ 滚动入场（仅 JS 可用时隐藏，避免脚本异常导致内容消失） ============ */
  html.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
  html.js .reveal.in { opacity: 1; transform: none; }
  .reveal.d1 { transition-delay: .08s; } .reveal.d2 { transition-delay: .16s; } .reveal.d3 { transition-delay: .24s; }

  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    html.js .reveal { opacity: 1; transform: none; transition: none; }
    .card:hover, .btn:hover { transform: none; }
    #starfield { display: none; }
  }

  /* ============ 响应式 ============ */
  @media (max-width: 1024px) {
    .value-grid, .news-grid { grid-template-columns: 1fr 1fr; }
    .news-grid > :last-child { grid-column: 1 / -1; }
    .about-grid, .contact-grid { grid-template-columns: 1fr; }
    .hero-stats { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-cta { display: none; }
    .menu-btn { display: inline-flex; }
    .nav.open .nav-links {
      display: flex; flex-direction: column; align-items: flex-start; gap: 4px;
      position: absolute; top: 72px; left: 0; right: 0; padding: 14px clamp(20px, 4vw, 40px) 22px;
      background: color-mix(in srgb, var(--seed-bg) 94%, transparent);
      -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-soft);
    }
    .nav.open .nav-links a { padding: 11px 0; width: 100%; font-size: 16px; }
    .nav.open .nav-links .nav-cta { display: inline-flex; width: auto; margin-top: 10px; }
    .services-grid, .qual-grid, .value-grid, .news-grid { grid-template-columns: 1fr; }
    .news-grid > :last-child { grid-column: auto; }
    .form-row { grid-template-columns: 1fr; }
    .foot-grid { grid-template-columns: 1fr; gap: 28px; }
    .service { grid-template-columns: 1fr; gap: 16px; }

    /* 手机端：收起大页脚，改用底部快捷导航 */
    footer.site .foot-grid { display: none; }
    footer.site { padding: 20px 0 18px; }
    .foot-base { border-top: 0; padding-top: 0; justify-content: center; text-align: center; gap: 4px 14px; font-size: 11.5px; line-height: 1.7; }
    body { padding-bottom: calc(56px + env(safe-area-inset-bottom)); }
    .xl-tabbar {
      display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; align-items: stretch;
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 80;
      height: calc(56px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom);
      background: color-mix(in srgb, var(--seed-surface) 94%, transparent);
      -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
      border-top: 1px solid var(--border-soft);
    }
    .xl-tabbar a {
      display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
      font-size: 11px; letter-spacing: .04em; color: var(--muted); transition: color .18s ease;
    }
    .xl-tabbar a svg { width: 20px; height: 20px; }
    .xl-tabbar a.on { color: var(--primary-ink); font-weight: 600; }
    .xl-tabbar a:active { color: var(--primary); }
  }
  @media (max-width: 480px) {
    .hero-stats { grid-template-columns: 1fr 1fr; }
    .about-facts { grid-template-columns: 1fr; }
  }

  /* ============ 内部工作平台（统一网关模块） ============ */
  .gw-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .gw-card { display: flex; flex-direction: column; gap: 13px; padding: 26px 26px 20px; }
  .gw-top { display: flex; align-items: center; gap: 14px; }
  .gw-icon {
    width: 42px; height: 42px; flex: none; border-radius: var(--r-sm);
    display: flex; align-items: center; justify-content: center;
    color: var(--primary-ink); border: 1px solid var(--border-soft);
    background: var(--primary-dim);
  }
  .gw-icon svg { width: 21px; height: 21px; }
  .gw-card h3 { font-size: 16.5px; font-weight: 600; letter-spacing: 0.01em; }
  .gw-card p { font-size: 13.5px; color: var(--muted); line-height: 1.72; }
  .gw-path {
    margin-top: auto; padding-top: 14px; border-top: 1px dashed var(--border-soft);
    display: flex; align-items: center; justify-content: space-between; gap: 10px;
    font-size: 12px; color: var(--faint); letter-spacing: 0.03em;
  }
  .gw-path code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 11.5px; color: var(--primary-ink);
  }
  .gw-path .go { display: inline-flex; align-items: center; gap: 5px; }
  .gw-path .go svg { width: 13px; height: 13px; }
  .gw-bar {
    margin-top: 20px; padding: 22px 26px; border: 1px solid var(--border-soft);
    border-radius: var(--r-md); background: var(--surface);
    display: flex; align-items: center; justify-content: space-between; gap: 22px; flex-wrap: wrap;
  }
  .gw-bar .l { display: flex; align-items: center; gap: 15px; }
  .gw-bar h4 { font-size: 15.5px; font-weight: 600; }
  .gw-bar .l p { font-size: 13px; color: var(--muted); margin-top: 3px; }
  .gw-note { margin-top: 18px; font-size: 12.5px; color: var(--faint); letter-spacing: 0.02em; }
  @media (max-width: 768px) {
    .gw-grid { grid-template-columns: 1fr 1fr; }
    .gw-bar { align-items: flex-start; }
  }
  @media (max-width: 480px) {
    .gw-grid { grid-template-columns: 1fr; }
  }