/* ==========================================================================
   元启蓝图科技 — 企业门户样式表
   设计系统单一来源实现。所有值可追溯至 DESIGN.md。
   ========================================================================== */

/* ---------- 1. 设计令牌 (Tokens) ---------- */
:root {
  /* 主色 — 蓝图蓝 */
  --color-primary: #0f4c81;
  --color-primary-dark: #0a3a63;
  --color-primary-light: #e8f1f9;
  --color-primary-lighter: #f4f8fc;

  /* 强调色 — 琥珀 */
  --color-accent: #d97706;
  --color-accent-dark: #b45309;

  /* 中性 */
  --color-ink: #0f172a;
  --color-text: #334155;
  --color-muted: #64748b;
  --color-subtle: #94a3b8;
  --color-border: #e2e8f0;
  --color-surface: #ffffff;
  --color-surface-alt: #f8fafc;
  --color-grid: #dbeafe;

  /* 语义 */
  --color-success: #15803d;
  --color-danger: #dc2626;
  --color-footer-bg: #0a2540;

  /* 字号 */
  --fs-display: 3rem;
  --fs-h1: 2.5rem;
  --fs-h2: 2rem;
  --fs-h3: 1.5rem;
  --fs-h4: 1.25rem;
  --fs-body-lg: 1.125rem;
  --fs-body: 1rem;
  --fs-sm: 0.875rem;
  --fs-eyebrow: 0.8125rem;

  /* 间距 (8px 基准) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  /* 布局 */
  --container: 1200px;
  --container-pad: 24px;
  --header-h: 72px;

  /* 圆角 / 阴影 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, .08);
  --shadow-lg: 0 12px 40px rgba(15, 76, 129, .12);
  --shadow-card-hover: 0 18px 50px rgba(15, 76, 129, .16);

  /* 动效 — 仅 transform/opacity/filter */
  --ease: cubic-bezier(.16, 1, .3, 1);
  --t-fast: 150ms;
  --t-base: 250ms;
  --t-slow: 400ms;

  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", -apple-system, system-ui, "Segoe UI", Roboto, sans-serif;
}

/* ---------- 2. Reset / 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--t-fast) var(--ease); }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; padding: 0; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; border-radius: 4px; }
::selection { background: var(--color-primary-light); color: var(--color-primary-dark); }

h1, h2, h3, h4 { color: var(--color-ink); line-height: 1.2; font-weight: 700; }
p { color: var(--color-text); }

/* ---------- 3. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}
.section { padding-block: var(--space-9); }
.section--tight { padding-block: var(--space-8); }
.section--alt { background: var(--color-surface-alt); }
.section--primary { background: var(--color-primary); color: #dce8f3; }
.section--primary h1, .section--primary h2, .section--primary h3 { color: #fff; }

.text-center { text-align: center; }
.mx-auto { margin-inline: auto; }

/* 区块标题组合：eyebrow + h2 + 引导段 */
.section-head { max-width: 720px; margin-bottom: var(--space-7); }
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-4);
}
.section--primary .eyebrow { background: rgba(255,255,255,.12); color: #bcd6ef; }
.section-title { font-size: var(--fs-h2); margin-bottom: var(--space-3); }
.section-lead { font-size: var(--fs-body-lg); color: var(--color-muted); }
.section--primary .section-lead { color: #c6d8e8; }

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-size: var(--fs-body);
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: transform var(--t-fast) var(--ease),
              box-shadow var(--t-base) var(--ease),
              background var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn--primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--accent { background: var(--color-accent); color: #fff; box-shadow: var(--shadow-sm); }
.btn--accent:hover { background: var(--color-accent-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--color-primary); border: 1.5px solid var(--color-primary); padding: 11.5px 24.5px; }
.btn--ghost:hover { background: var(--color-primary-light); color: var(--color-primary-dark); }
.btn--ghost-light { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.6); padding: 11.5px 24.5px; }
.btn--ghost-light:hover { background: rgba(255,255,255,.12); color: #fff; border-color: #fff; }
.btn--lg { padding: 16px 32px; font-size: var(--fs-body-lg); }
.btn--block { width: 100%; }

/* ---------- 5. 页头 / 导航 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid transparent;
  z-index: 1000;
  transition: box-shadow var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}
.site-header.scrolled { box-shadow: var(--shadow-sm); border-color: var(--color-border); }
.nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}
.brand { display: inline-flex; align-items: center; flex-shrink: 0; }
.brand img { height: 32px; width: auto; }
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.nav-links a {
  position: relative;
  padding: 8px 14px;
  font-size: var(--fs-body);
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.nav-links a:hover { color: var(--color-primary); background: var(--color-primary-lighter); }
.nav-links a.active { color: var(--color-primary); font-weight: 600; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.nav-cta { display: flex; align-items: center; gap: var(--space-3); }
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
}
.nav-toggle:hover { background: var(--color-primary-lighter); }
.nav-toggle svg { width: 26px; height: 26px; color: var(--color-ink); }
.nav-toggle .icon-close { display: none; }
body.menu-open .nav-toggle .icon-menu { display: none; }
body.menu-open .nav-toggle .icon-close { display: block; }

/* ---------- 6. Hero ---------- */
.hero {
  position: relative;
  padding-top: calc(var(--header-h) + var(--space-9));
  padding-bottom: var(--space-9);
  background: linear-gradient(180deg, var(--color-primary-lighter) 0%, var(--color-surface) 100%);
  overflow: hidden;
}
/* 蓝图网格背景（极淡） */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 36px 36px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 70% 0%, #000 30%, transparent 75%);
          mask-image: radial-gradient(ellipse 80% 60% at 70% 0%, #000 30%, transparent 75%);
  opacity: .55;
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: var(--space-7);
  align-items: center;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: var(--fs-sm); font-weight: 600; color: var(--color-primary);
  background: #fff; border: 1px solid var(--color-primary-light);
  padding: 7px 16px; border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm); margin-bottom: var(--space-5);
}
.hero-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-accent); }
.hero h1 { font-size: var(--fs-display); letter-spacing: -.01em; margin-bottom: var(--space-4); }
.hero h1 .hl { color: var(--color-primary); }
.hero-sub { font-size: var(--fs-body-lg); color: var(--color-muted); max-width: 540px; margin-bottom: var(--space-6); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.hero-trust {
  margin-top: var(--space-7);
  display: flex; flex-wrap: wrap; gap: var(--space-5) var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}
.hero-trust .item { display: flex; flex-direction: column; }
.hero-trust .num { font-size: var(--fs-h3); font-weight: 700; color: var(--color-ink); font-variant-numeric: tabular-nums; }
.hero-trust .num .plus { color: var(--color-accent); }
.hero-trust .label { font-size: var(--fs-sm); color: var(--color-muted); }

/* Hero 视觉卡片堆叠 */
.hero-visual { position: relative; }
.hero-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-5);
  position: relative;
}
.hero-card .ribbon {
  position: absolute; top: -14px; left: var(--space-5);
  background: var(--color-primary); color: #fff;
  font-size: var(--fs-sm); font-weight: 600;
  padding: 6px 14px; border-radius: var(--radius-pill);
  box-shadow: var(--shadow-md);
}
.hero-card h3 { font-size: var(--fs-h4); margin-bottom: var(--space-3); }
.hero-card ul.check-list { display: grid; gap: 10px; }
.hero-card.floating {
  position: absolute; right: -8px; bottom: -28px;
  width: 230px; padding: var(--space-4);
  box-shadow: var(--shadow-card-hover);
}

/* ---------- 7. 通用卡片 / 图标块 ---------- */
.icon-block {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.icon-block svg { width: 26px; height: 26px; }
.icon-block--accent { background: #fef3e2; color: var(--color-accent-dark); }
.icon-block--lg { width: 64px; height: 64px; }
.icon-block--lg svg { width: 32px; height: 32px; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
  height: 100%;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); border-color: var(--color-primary-light); }

/* check-list */
.check-list { display: grid; gap: 8px; }
.check-list li { display: flex; gap: 10px; align-items: flex-start; font-size: var(--fs-body); color: var(--color-text); }
.check-list svg { width: 20px; height: 20px; color: var(--color-success); flex-shrink: 0; margin-top: 4px; }

/* 网格 */
.grid { display: grid; gap: var(--space-5); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 8. 服务卡片 ---------- */
.service-card { position: relative; overflow: hidden; }
.service-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--color-primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-base) var(--ease);
}
.service-card:hover::before { transform: scaleX(1); }
.service-card .num-tag {
  position: absolute; top: var(--space-5); right: var(--space-5);
  font-size: 2.25rem; font-weight: 800; line-height: 1;
  color: var(--color-primary-light); font-variant-numeric: tabular-nums;
}
.service-card h3 { font-size: var(--fs-h4); margin-bottom: var(--space-3); padding-right: var(--space-7); }
.service-card .desc { color: var(--color-muted); margin-bottom: var(--space-4); font-size: var(--fs-sm); }
.service-card .card-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 600; font-size: var(--fs-sm); color: var(--color-primary);
  margin-top: var(--space-3);
}
.service-card .card-link svg { width: 16px; height: 16px; transition: transform var(--t-fast) var(--ease); }
.service-card:hover .card-link svg { transform: translateX(4px); }

/* ---------- 9. 为什么选择我们 ---------- */
.feature-card { text-align: left; }
.feature-card h3 { font-size: var(--fs-h4); margin-bottom: var(--space-2); }

/* ---------- 10. 数据统计 ---------- */
.stats-band {
  background: var(--color-primary);
  background-image: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-7) var(--space-5);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}
.stats-band .stat { text-align: center; color: #fff; }
.stats-band .num {
  font-size: var(--fs-display); font-weight: 800; line-height: 1.1;
  color: #fff; font-variant-numeric: tabular-nums;
}
.stats-band .num .unit { font-size: 1.5rem; font-weight: 700; color: #fcd9a1; margin-left: 2px; }
.stats-band .label { margin-top: var(--space-2); color: #bcd6ef; font-size: var(--fs-sm); }

/* ---------- 11. CTA 横幅 ---------- */
.cta-band {
  position: relative;
  background: var(--color-primary);
  background-image: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-7);
  color: #fff;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: var(--space-6);
  align-items: center;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.07) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.cta-band > * { position: relative; z-index: 1; }
.cta-band h2 { color: #fff; font-size: var(--fs-h1); margin-bottom: var(--space-3); }
.cta-band p { color: #c6d8e8; font-size: var(--fs-body-lg); }
.cta-band .actions { display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: flex-end; }

/* ---------- 12. 页面通用头部（内页） ---------- */
.page-hero {
  padding-top: calc(var(--header-h) + var(--space-8));
  padding-bottom: var(--space-8);
  background: var(--color-primary-lighter);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 90% 0%, #000 20%, transparent 70%);
          mask-image: radial-gradient(ellipse 70% 80% at 90% 0%, #000 20%, transparent 70%);
  opacity: .5;
}
.page-hero .container { position: relative; z-index: 1; max-width: 820px; }
.page-hero h1 { font-size: var(--fs-h1); margin-bottom: var(--space-3); }
.page-hero p { font-size: var(--fs-body-lg); color: var(--color-muted); }
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: var(--fs-sm); color: var(--color-muted);
  margin-bottom: var(--space-4);
}
.breadcrumb a { color: var(--color-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb svg { width: 14px; height: 14px; color: var(--color-subtle); }

/* ---------- 13. 服务详情行（交替） ---------- */
.detail-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: center;
  padding-block: var(--space-7);
  border-bottom: 1px solid var(--color-border);
}
.detail-row:last-child { border-bottom: 0; }
.detail-row.reverse .detail-media { order: 2; }
.detail-media {
  background: var(--color-primary-lighter);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  position: relative;
  overflow: hidden;
}
.detail-media::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: .6;
}
.detail-media .icon-block { position: relative; z-index: 1; }
.detail-content .eyebrow { margin-bottom: var(--space-3); }
.detail-content h2 { font-size: var(--fs-h3); margin-bottom: var(--space-3); }
.detail-content > p { color: var(--color-muted); margin-bottom: var(--space-4); }

/* ---------- 14. 时间轴（关于我们） ---------- */
.timeline { position: relative; max-width: 760px; margin-inline: auto; }
.timeline::before {
  content: ""; position: absolute; left: 11px; top: 6px; bottom: 6px;
  width: 2px; background: var(--color-border);
}
.tl-item { position: relative; padding-left: 44px; padding-bottom: var(--space-6); }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: 4px; top: 4px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 3px solid var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}
.tl-item .year { font-size: var(--fs-h4); font-weight: 700; color: var(--color-primary); font-variant-numeric: tabular-nums; }
.tl-item h3 { font-size: var(--fs-body-lg); margin: 4px 0 6px; }
.tl-item p { color: var(--color-muted); }

/* ---------- 15. 价值卡片 / 解决方案卡片 ---------- */
.value-card {
  text-align: center;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7) var(--space-5);
  height: 100%;
}
.value-card .icon-block { margin-inline: auto; }
.value-card h3 { font-size: var(--fs-h4); margin-bottom: var(--space-2); }

.solution-card {
  position: relative; overflow: hidden;
  background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6);
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
  height: 100%;
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.solution-card .tag {
  display: inline-block; font-size: var(--fs-sm); font-weight: 600;
  color: var(--color-accent-dark); background: #fef3e2;
  padding: 4px 12px; border-radius: var(--radius-pill); margin-bottom: var(--space-3);
}
.solution-card h3 { font-size: var(--fs-h4); margin-bottom: var(--space-3); }
.solution-card p { color: var(--color-muted); font-size: var(--fs-sm); margin-bottom: var(--space-4); }

/* ---------- 16. 案例卡片 ---------- */
.case-card {
  background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
  height: 100%; display: flex; flex-direction: column;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.case-thumb {
  height: 168px; position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}
.case-thumb.tone-1 { background: linear-gradient(135deg, #0f4c81, #1e6ba8); }
.case-thumb.tone-2 { background: linear-gradient(135deg, #0a3a63, #15527d); }
.case-thumb.tone-3 { background: linear-gradient(135deg, #b45309, #d97706); }
.case-thumb.tone-4 { background: linear-gradient(135deg, #0f4c81, #0a3a63); }
.case-thumb .industry {
  font-size: var(--fs-h4); font-weight: 700; padding: var(--space-5);
}
.case-thumb::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 28px 28px;
}
.case-body { padding: var(--space-5); display: flex; flex-direction: column; flex: 1; }
.case-body .meta { font-size: var(--fs-sm); color: var(--color-accent-dark); font-weight: 600; margin-bottom: var(--space-2); }
.case-body h3 { font-size: var(--fs-h4); margin-bottom: var(--space-2); }
.case-body p { color: var(--color-muted); font-size: var(--fs-sm); margin-bottom: var(--space-4); flex: 1; }
.case-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.case-tags span {
  font-size: .75rem; color: var(--color-muted); background: var(--color-surface-alt);
  border: 1px solid var(--color-border); padding: 3px 10px; border-radius: var(--radius-pill);
}

/* ---------- 17. 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--space-6);
}
.contact-info-card {
  background: var(--color-primary);
  background-image: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.contact-info-card::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 28px 28px;
}
.contact-info-card > * { position: relative; z-index: 1; }
.contact-info-card h2 { color: #fff; margin-bottom: var(--space-2); }
.contact-info-card .lead { color: #c6d8e8; margin-bottom: var(--space-6); }
.contact-list { display: grid; gap: var(--space-5); }
.contact-list li { display: flex; gap: var(--space-3); align-items: flex-start; }
.contact-list .ic {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: var(--radius-md);
  background: rgba(255,255,255,.12); display: flex; align-items: center; justify-content: center;
}
.contact-list .ic svg { width: 22px; height: 22px; color: #fff; }
.contact-list .k { font-size: var(--fs-sm); color: #bcd6ef; margin-bottom: 2px; }
.contact-list .v { font-size: var(--fs-body); color: #fff; font-weight: 500; word-break: break-all; }

.form-card {
  background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-7);
  box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.form-group { margin-bottom: var(--space-4); }
.form-group label { display: block; font-size: var(--fs-sm); font-weight: 600; color: var(--color-ink); margin-bottom: 6px; }
.form-group label .req { color: var(--color-danger); }
.form-control {
  width: 100%; padding: 12px 14px;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.form-control::placeholder { color: var(--color-subtle); }
.form-control:focus { outline: none; background: #fff; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-light); }
.form-control.invalid { border-color: var(--color-danger); background: #fef2f2; }
textarea.form-control { resize: vertical; min-height: 130px; }
.form-error { display: none; font-size: var(--fs-sm); color: var(--color-danger); margin-top: 6px; }
.form-group.has-error .form-error { display: block; }
.form-note { font-size: var(--fs-sm); color: var(--color-muted); margin-top: var(--space-3); }
.form-success {
  display: none; align-items: center; gap: 10px;
  background: #ecfdf5; border: 1px solid #bbf7d0; color: var(--color-success);
  padding: 12px 16px; border-radius: var(--radius-md); margin-bottom: var(--space-4);
}
.form-success.show { display: flex; }
.form-success svg { width: 20px; height: 20px; flex-shrink: 0; }

.map-embed {
  margin-top: var(--space-7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-primary-lighter);
  height: 320px;
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.map-embed::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 32px 32px; opacity: .7;
}
.map-embed .placeholder { position: relative; z-index: 1; text-align: center; color: var(--color-muted); }
.map-embed .placeholder svg { width: 40px; height: 40px; color: var(--color-primary); margin: 0 auto var(--space-2); }

/* ---------- 18. 资质 / 客户 logo 墙 ---------- */
.logo-wall { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-4); }
.logo-chip {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-4); text-align: center;
  color: var(--color-muted); font-weight: 600; font-size: var(--fs-sm);
  display: flex; align-items: center; justify-content: center; min-height: 72px;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.logo-chip:hover { border-color: var(--color-primary-light); color: var(--color-primary); }

/* ---------- 19. 页脚 ---------- */
.site-footer {
  background: var(--color-footer-bg);
  color: #cbd5e1;
  padding-top: var(--space-8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-6);
  padding-bottom: var(--space-7);
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand img { height: 34px; filter: brightness(0) invert(1); margin-bottom: var(--space-4); }
.footer-brand p { color: #94a3b8; font-size: var(--fs-sm); max-width: 320px; }
.footer-col h4 { color: #fff; font-size: var(--fs-body); font-weight: 600; margin-bottom: var(--space-4); }
.footer-col ul { display: grid; gap: 10px; }
.footer-col a { color: #94a3b8; font-size: var(--fs-sm); }
.footer-col a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; font-size: var(--fs-sm); color: #94a3b8; margin-bottom: 10px; }
.footer-contact svg { width: 18px; height: 18px; color: #64748b; flex-shrink: 0; margin-top: 2px; }
.footer-contact .v { color: #cbd5e1; }
.footer-bottom {
  padding-block: var(--space-5);
  display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-5);
  align-items: center; justify-content: space-between;
  font-size: var(--fs-sm); color: #94a3b8;
}
.icp { display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: center; }
.icp a { color: #94a3b8; display: inline-flex; align-items: center; gap: 6px; }
.icp a:hover { color: #fff; }
.icp .beian-ico { width: 16px; height: 16px; display: inline-block; vertical-align: middle; }

/* ---------- 20. 滚动进场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 60ms; }
.reveal.d2 { transition-delay: 120ms; }
.reveal.d3 { transition-delay: 180ms; }
.reveal.d4 { transition-delay: 240ms; }

/* ---------- 21. 杂项 ---------- */
.lead-para { font-size: var(--fs-body-lg); color: var(--color-muted); max-width: 760px; }
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-7 { margin-top: var(--space-7); }
.mb-0 { margin-bottom: 0; }
.divider { height: 1px; background: var(--color-border); border: 0; margin-block: var(--space-7); }
.tag-soft {
  display: inline-block; font-size: var(--fs-sm); color: var(--color-muted);
  background: var(--color-surface-alt); border: 1px solid var(--color-border);
  padding: 4px 12px; border-radius: var(--radius-pill);
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 2000;
  background: #fff; color: var(--color-primary); padding: 10px 16px;
  border-radius: 0 0 var(--radius-md) 0; box-shadow: var(--shadow-md); font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ==========================================================================
   22. 响应式
   ========================================================================== */
@media (max-width: 1024px) {
  :root { --fs-display: 2.5rem; --fs-h1: 2.125rem; }
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-7); }
  .hero-visual { max-width: 520px; }
  .detail-row { grid-template-columns: 1fr; gap: var(--space-5); }
  .detail-row.reverse .detail-media { order: 0; }
  .cta-band { grid-template-columns: 1fr; text-align: center; }
  .cta-band .actions { justify-content: center; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-7) var(--space-6); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-band { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --fs-display: 2.125rem; --fs-h1: 1.875rem; --fs-h2: 1.625rem;
    --header-h: 60px; --container-pad: 16px;
  }
  .section { padding-block: var(--space-8); }

  /* 移动菜单 */
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed;
    top: var(--header-h); left: 0; right: 0; bottom: 0;
    flex-direction: column; align-items: stretch;
    gap: 0;
    background: #fff;
    padding: var(--space-4) var(--container-pad) var(--space-7);
    transform: translateX(100%);
    transition: transform var(--t-slow) var(--ease);
    overflow-y: auto;
    border-top: 1px solid var(--color-border);
  }
  body.menu-open .nav-links { transform: none; box-shadow: var(--shadow-lg); }
  .nav-links a { padding: 14px 12px; font-size: var(--fs-body-lg); border-radius: var(--radius-md); border-bottom: 1px solid var(--color-border); }
  .nav-links a.active::after { display: none; }
  .nav-cta .btn:not(.nav-toggle) { display: none; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-actions .btn { flex: 1 1 100%; }
  .hero-trust { gap: var(--space-4) var(--space-5); }
  .hero-card.floating { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .cta-band { padding: var(--space-7) var(--space-5); }
}

@media (max-width: 420px) {
  .hero-trust .num { font-size: var(--fs-h4); }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}