/* ==========================================================================
   漯河联枢科技有限公司 — 门户网站全局样式
   ========================================================================== */

:root {
  --primary: #1a56db;
  --primary-600: #1449bd;
  --primary-700: #0f3a9e;
  --navy: #0b1f4e;
  --navy-2: #0e2a6b;
  --accent: #f59e0b;
  --ink: #101828;
  --text: #344054;
  --muted: #667085;
  --line: #e4e9f2;
  --bg-soft: #f5f8fe;
  --bg-blue: #eef4ff;
  --white: #fff;
  --radius: 16px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  --shadow-md: 0 10px 30px rgba(13, 38, 90, .10);
  --shadow-lg: 0 24px 60px rgba(13, 38, 90, .22);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "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; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-700); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 15px; color: var(--ink); }

h1, h2, h3, h4 { color: var(--ink); line-height: 1.3; font-weight: 700; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section-soft { background: var(--bg-soft); }

/* 小标签 + 标题的通用段落头 */
.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; letter-spacing: 2px;
  color: var(--primary); background: var(--bg-blue);
  border-radius: 999px; padding: 6px 16px; margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }
.section-head h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; }
.section-desc { color: var(--muted); font-size: 16.5px; }

/* ==========================================================================
   按钮
   ========================================================================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px; border-radius: 10px; border: 1.5px solid transparent;
  font-size: 15.5px; font-weight: 600; line-height: 1.4;
  transition: transform .18s, box-shadow .18s, background .18s, color .18s, border-color .18s;
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, #2f6bff, var(--primary-600));
  color: #fff; box-shadow: 0 8px 22px rgba(26, 86, 219, .32);
}
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 12px 28px rgba(26, 86, 219, .42); }
.btn-ghost { border-color: rgba(255, 255, 255, .55); color: #fff; background: rgba(255, 255, 255, .06); }
.btn-ghost:hover { background: #fff; color: var(--navy); border-color: #fff; }
.btn-outline { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 9px 20px; font-size: 14px; border-radius: 8px; }

.text-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 600; font-size: 15px;
}
.text-link svg { transition: transform .2s; }
.text-link:hover svg { transform: translateX(4px); }

/* ==========================================================================
   顶部导航
   ========================================================================== */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  color: #fff;
  background: rgba(11, 31, 78, .38);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .10);
  transition: background .25s, color .25s, box-shadow .25s, border-color .25s;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, .96);
  color: var(--ink);
  border-bottom-color: var(--line);
  box-shadow: 0 4px 18px rgba(13, 38, 90, .08);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.brand { display: inline-flex; align-items: center; gap: 11px; color: inherit; }
.brand:hover { color: inherit; }
.brand-logo { width: 38px; height: 38px; color: #4d8bff; flex: none; }
.site-header.scrolled .brand-logo { color: var(--primary); }
.brand-text { font-size: 20px; font-weight: 700; letter-spacing: 1px; line-height: 1.15; }
.brand-text em {
  display: block; font-style: normal; font-weight: 500;
  font-size: 10.5px; letter-spacing: 3.5px; opacity: .72;
}

.site-nav { display: flex; align-items: center; gap: 34px; }
.site-nav > a { color: inherit; font-size: 15.5px; font-weight: 500; opacity: .88; position: relative; padding: 6px 0; }
.site-nav > a:hover { opacity: 1; color: inherit; }
.site-nav > a.active { opacity: 1; font-weight: 600; }
.site-nav > a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2.5px;
  border-radius: 2px; background: var(--accent);
}
.site-nav .nav-cta { opacity: 1; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; padding: 8px; border-radius: 8px;
}
.nav-toggle span { width: 22px; height: 2px; border-radius: 2px; background: currentColor; transition: transform .25s, opacity .25s; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   首页 Hero
   ========================================================================== */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(900px 480px at 85% -10%, rgba(77, 139, 255, .35), transparent 60%),
    radial-gradient(700px 420px at -10% 110%, rgba(26, 86, 219, .45), transparent 60%),
    linear-gradient(150deg, #0b1f4e 0%, #0e2a6b 55%, #123a9e 100%);
  padding: 172px 0 108px;
}
.hero-grid-bg {
  position: absolute; inset: 0; opacity: .10; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, .5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .5) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 75%);
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; letter-spacing: 1px; color: #bcd2ff;
  border: 1px solid rgba(255, 255, 255, .22); background: rgba(255, 255, 255, .07);
  border-radius: 999px; padding: 7px 18px; margin-bottom: 26px;
}
.hero-eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }

.hero h1 { color: #fff; font-size: clamp(32px, 4.4vw, 50px); letter-spacing: 1px; margin-bottom: 22px; }
.hero h1 em { font-style: normal; color: #7db0ff; position: relative; }
.hero-sub { font-size: 17.5px; color: rgba(255, 255, 255, .82); max-width: 540px; margin-bottom: 34px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 34px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 12px 26px; font-size: 14.5px; color: rgba(255, 255, 255, .75); }
.hero-points li { display: inline-flex; align-items: center; gap: 8px; }
.hero-points li::before { content: "✓"; color: var(--accent); font-weight: 700; }

/* 平台监控示意窗 */
.hero-visual { position: relative; }
.mock-window {
  background: rgba(255, 255, 255, .97); border-radius: 18px;
  box-shadow: var(--shadow-lg); overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .6);
  animation: floatY 7s ease-in-out infinite;
}
@keyframes floatY { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

.mock-titlebar {
  display: flex; align-items: center; gap: 7px;
  background: #0e2a6b; padding: 12px 16px;
}
.mock-titlebar span { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, .28); }
.mock-titlebar span:nth-child(1) { background: #ff5f57; }
.mock-titlebar span:nth-child(2) { background: #febc2e; }
.mock-titlebar span:nth-child(3) { background: #28c840; }
.mock-titlebar em {
  font-style: normal; color: rgba(255, 255, 255, .85); font-size: 12.5px; margin-left: 8px; letter-spacing: .5px;
}
.mock-body { padding: 18px 20px 20px; }
.mock-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 16px; }
.mock-stat { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 12px; padding: 12px 8px; text-align: center; }
.mock-stat b { display: block; font-size: 22px; color: var(--primary-700); font-variant-numeric: tabular-nums; }
.mock-stat span { font-size: 12px; color: var(--muted); }

.mock-chart {
  display: flex; align-items: flex-end; gap: 7px; height: 108px;
  padding: 12px 4px 10px; margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.mock-chart i {
  flex: 1; height: var(--h, 40%); border-radius: 4px 4px 2px 2px;
  background: linear-gradient(180deg, #6ea1ff, var(--primary));
  transform-origin: bottom; animation: growBar 1.1s cubic-bezier(.22, .8, .32, 1) backwards;
}
.mock-chart i:nth-child(odd) { opacity: .55; }
@keyframes growBar { from { transform: scaleY(0); } to { transform: scaleY(1); } }

.mock-rows { display: grid; gap: 9px; }
.mock-rows li {
  display: flex; align-items: center; gap: 9px;
  font-size: 12.8px; color: var(--text);
  background: var(--bg-soft); border-radius: 9px; padding: 8px 12px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.dot.ok { background: #12b76a; box-shadow: 0 0 0 3px rgba(18, 183, 106, .16); }
.dot.warn { background: var(--accent); box-shadow: 0 0 0 3px rgba(245, 158, 11, .18); }

.float-chip {
  position: absolute; z-index: 2;
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; color: var(--ink);
  font-size: 13.5px; font-weight: 600;
  border-radius: 999px; padding: 10px 18px;
  box-shadow: var(--shadow-md);
  animation: floatY 6s ease-in-out infinite;
}
.float-chip::before { content: ""; width: 8px; height: 8px; border-radius: 50%; }
.chip-a { top: -18px; right: 6%; }
.chip-a::before { background: #12b76a; }
.chip-b { bottom: -16px; left: -4%; animation-delay: 1.4s; }
.chip-b::before { background: var(--accent); }

/* ==========================================================================
   数据带 / 通用网格
   ========================================================================== */
.stats-band { background: var(--navy); color: #fff; padding: 44px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat b { display: block; font-size: clamp(28px, 3.4vw, 40px); color: #fff; font-variant-numeric: tabular-nums; }
.stat b em { font-style: normal; font-size: .55em; color: #8fb4ff; margin-left: 2px; }
.stat span { font-size: 14px; color: rgba(255, 255, 255, .66); letter-spacing: 1px; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }

/* ==========================================================================
   产品卡片
   ========================================================================== */
.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.product-card {
  position: relative; display: flex; flex-direction: column; gap: 14px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 30px 28px; overflow: hidden;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.product-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), #6ea1ff);
  opacity: 0; transition: opacity .25s;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.product-card:hover::before { opacity: 1; }

.product-icon {
  width: 62px; height: 62px; border-radius: 16px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--bg-blue), #dce8ff);
  color: var(--primary);
}
.product-icon svg { width: 30px; height: 30px; }
.product-card h3 { font-size: 20px; }
.product-card > p { font-size: 15px; color: var(--muted); flex: 1; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-row li {
  font-size: 12.5px; color: var(--primary-700); background: var(--bg-blue);
  border-radius: 6px; padding: 3px 10px;
}
.product-card .text-link { margin-top: 4px; }

/* ==========================================================================
   优势 / 特性卡
   ========================================================================== */
.feature-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; transition: transform .25s, box-shadow .25s;
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.feature-icon {
  width: 52px; height: 52px; border-radius: 13px; display: grid; place-items: center;
  background: var(--bg-blue); color: var(--primary); margin-bottom: 18px;
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h3 { font-size: 17.5px; margin-bottom: 10px; }
.feature-card p { font-size: 14.5px; color: var(--muted); }

/* 服务流程 */
.process-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: step; }
.process-item {
  position: relative; text-align: center; padding: 30px 16px 24px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  transition: transform .25s, box-shadow .25s;
}
.process-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.process-item::before {
  counter-increment: step; content: "0" counter(step);
  position: absolute; top: -16px; left: 50%; transform: translateX(-50%);
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #2f6bff, var(--primary-600));
  color: #fff; font-size: 13px; font-weight: 700;
  box-shadow: 0 6px 14px rgba(26, 86, 219, .35);
}
.process-item h3 { font-size: 16.5px; margin-bottom: 8px; }
.process-item p { font-size: 13.5px; color: var(--muted); }

/* ==========================================================================
   新闻卡片
   ========================================================================== */
.news-card {
  display: flex; flex-direction: column; gap: 12px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform .25s, box-shadow .25s;
}
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.news-cover {
  height: 158px; display: grid; place-items: center; color: rgba(255, 255, 255, .9);
  background: linear-gradient(135deg, #123a9e, #2f6bff);
}
.news-cover.alt { background: linear-gradient(135deg, #0b1f4e, #1449bd); }
.news-cover svg { width: 44px; height: 44px; opacity: .85; }
.news-body { display: flex; flex-direction: column; gap: 10px; padding: 20px 22px 24px; flex: 1; }
.news-meta { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); }
.news-meta .tag {
  font-size: 12px; color: var(--primary-700); background: var(--bg-blue);
  border-radius: 5px; padding: 2px 9px;
}
.news-body h3 { font-size: 17px; line-height: 1.45; }
.news-body h3 a { color: inherit; }
.news-body h3 a:hover { color: var(--primary); }
.news-body p { font-size: 14px; color: var(--muted); flex: 1; }

/* ==========================================================================
   CTA 横幅
   ========================================================================== */
.cta-band {
  position: relative; overflow: hidden; color: #fff; text-align: center;
  background:
    radial-gradient(600px 300px at 20% 0%, rgba(77, 139, 255, .4), transparent 60%),
    radial-gradient(600px 300px at 85% 100%, rgba(245, 158, 11, .25), transparent 60%),
    linear-gradient(135deg, #0b1f4e, #123a9e);
  padding: 76px 0;
}
.cta-band h2 { color: #fff; font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; }
.cta-band p { color: rgba(255, 255, 255, .8); max-width: 620px; margin: 0 auto 30px; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer { background: var(--navy); color: rgba(255, 255, 255, .72); font-size: 14.5px; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px; padding: 64px 0 48px;
}
.footer-brand .brand { color: #fff; margin-bottom: 18px; }
.footer-brand p { max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 18px; letter-spacing: 1px; }
.footer-col ul { display: grid; gap: 11px; }
.footer-col a { color: rgba(255, 255, 255, .72); }
.footer-col a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer-contact svg { width: 17px; height: 17px; flex: none; margin-top: 4px; color: #6ea1ff; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12); padding: 20px 0;
  font-size: 13px; color: rgba(255, 255, 255, .5);
  display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between;
}
.footer-bottom a { color: inherit; }
.footer-bottom a:hover { color: #fff; }

/* ==========================================================================
   子页面 Hero
   ========================================================================== */
.page-hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(700px 360px at 80% -20%, rgba(77, 139, 255, .35), transparent 60%),
    linear-gradient(150deg, #0b1f4e 0%, #0e2a6b 60%, #123a9e 100%);
  padding: 158px 0 64px;
}
.page-hero .hero-grid-bg { opacity: .08; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; font-size: 14px; color: rgba(255, 255, 255, .65); margin-bottom: 18px; }
.breadcrumb a { color: rgba(255, 255, 255, .8); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb i { font-style: normal; opacity: .5; }
.page-hero h1 { color: #fff; font-size: clamp(28px, 3.6vw, 40px); margin-bottom: 14px; }
.page-hero .page-desc { color: rgba(255, 255, 255, .82); font-size: 16.5px; max-width: 720px; }

/* ==========================================================================
   产品详情页
   ========================================================================== */
.overview-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.overview-copy h2 { font-size: clamp(22px, 2.6vw, 30px); margin-bottom: 18px; }
.overview-copy p { margin-bottom: 14px; }
.overview-points { display: grid; gap: 12px; margin-top: 22px; }
.overview-points li { display: flex; gap: 10px; align-items: flex-start; font-size: 15.5px; }
.overview-points li svg { width: 20px; height: 20px; color: #12b76a; flex: none; margin-top: 4px; }

.overview-visual {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(150deg, #0b1f4e, #123a9e);
  color: #fff; padding: 30px; box-shadow: var(--shadow-md);
}
.ov-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 22px; font-size: 13.5px; color: rgba(255, 255, 255, .75); padding-right: 78px; }
.ov-head b { color: #fff; font-size: 15px; }
.ov-stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 22px; }
.ov-stat { background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .14); border-radius: 12px; padding: 14px 10px; text-align: center; }
.ov-stat b { display: block; font-size: 21px; color: #9cc3ff; font-variant-numeric: tabular-nums; }
.ov-stat span { font-size: 12px; color: rgba(255, 255, 255, .65); }
.ov-list { display: grid; gap: 10px; }
.ov-list li {
  display: flex; align-items: center; gap: 10px; font-size: 13.5px;
  background: rgba(255, 255, 255, .07); border-radius: 10px; padding: 10px 14px;
}
.ov-badge {
  position: absolute; top: 18px; right: -34px; transform: rotate(38deg);
  background: var(--accent); color: #3d2800; font-size: 12px; font-weight: 700;
  padding: 5px 40px; letter-spacing: 2px; box-shadow: var(--shadow-sm);
}

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }

.adv-list { display: grid; gap: 0; max-width: 860px; margin: 0 auto; }
.adv-item {
  display: flex; gap: 22px; padding: 26px 8px;
  border-bottom: 1px solid var(--line); align-items: flex-start;
}
.adv-item:first-child { border-top: 1px solid var(--line); }
.adv-num {
  flex: none; width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(145deg, var(--bg-blue), #dce8ff);
  color: var(--primary); font-weight: 800; font-size: 17px;
}
.adv-item h3 { font-size: 17.5px; margin-bottom: 6px; }
.adv-item p { font-size: 14.5px; color: var(--muted); }

.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.scene-card {
  text-align: center; padding: 30px 18px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  transition: transform .25s, box-shadow .25s;
}
.scene-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.scene-icon { width: 54px; height: 54px; margin: 0 auto 16px; border-radius: 50%; display: grid; place-items: center; background: var(--bg-blue); color: var(--primary); }
.scene-icon svg { width: 26px; height: 26px; }
.scene-card h3 { font-size: 16px; margin-bottom: 8px; }
.scene-card p { font-size: 13.5px; color: var(--muted); }

.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
  display: flex; align-items: center; gap: 16px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; color: var(--ink);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); color: var(--ink); border-color: transparent; }
.related-card .product-icon { width: 48px; height: 48px; border-radius: 12px; }
.related-card .product-icon svg { width: 24px; height: 24px; }
.related-card b { display: block; font-size: 15.5px; margin-bottom: 3px; }
.related-card span { font-size: 13px; color: var(--muted); }

/* ==========================================================================
   关于我们
   ========================================================================== */
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: start; }
.about-copy h2 { font-size: clamp(22px, 2.6vw, 30px); margin-bottom: 18px; }
.about-copy p { margin-bottom: 14px; }
.brand-panel {
  background: linear-gradient(150deg, #0b1f4e, #123a9e); color: #fff;
  border-radius: var(--radius); padding: 36px 32px; position: sticky; top: 100px;
}
.brand-panel h3 { color: #fff; font-size: 19px; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.brand-panel h3::before { content: ""; width: 5px; height: 20px; border-radius: 3px; background: var(--accent); }
.brand-panel p { font-size: 14.5px; color: rgba(255, 255, 255, .82); margin-bottom: 18px; }
.brand-panel .chips { display: flex; flex-wrap: wrap; gap: 10px; }
.brand-panel .chips span {
  border: 1px solid rgba(255, 255, 255, .25); background: rgba(255, 255, 255, .07);
  border-radius: 8px; padding: 6px 14px; font-size: 13.5px;
}

.value-card { text-align: center; padding: 38px 26px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); transition: transform .25s, box-shadow .25s; }
.value-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.value-card .value-icon {
  width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 50%;
  display: grid; place-items: center; color: #fff; font-size: 24px; font-weight: 700;
  background: linear-gradient(135deg, #2f6bff, var(--primary-700));
}
.value-card h3 { font-size: 18px; margin-bottom: 10px; }
.value-card p { font-size: 14px; color: var(--muted); }

.timeline { position: relative; max-width: 780px; margin: 0 auto; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--primary), #c6d9ff); border-radius: 2px; }
.timeline-item { position: relative; padding: 0 0 34px 22px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ""; position: absolute; left: -32px; top: 6px;
  width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 3.5px solid var(--primary); box-shadow: 0 0 0 4px var(--bg-blue);
}
.timeline-item time { display: inline-block; font-weight: 700; color: var(--primary); font-size: 17px; margin-bottom: 6px; }
.timeline-item h3 { font-size: 16.5px; margin-bottom: 6px; }
.timeline-item p { font-size: 14.5px; color: var(--muted); }

.cert-chips { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.cert-chips li {
  display: inline-flex; align-items: center; gap: 10px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 22px; font-size: 14.5px; font-weight: 600; color: var(--ink);
  transition: transform .25s, box-shadow .25s;
}
.cert-chips li:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.cert-chips svg { width: 20px; height: 20px; color: var(--accent); flex: none; }

/* ==========================================================================
   联系我们
   ========================================================================== */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 44px; align-items: start; }
.contact-card {
  display: flex; gap: 16px; align-items: flex-start;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 24px; margin-bottom: 18px; transition: transform .25s, box-shadow .25s;
}
.contact-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.contact-card .product-icon { width: 46px; height: 46px; border-radius: 12px; }
.contact-card .product-icon svg { width: 22px; height: 22px; }
.contact-card b { display: block; font-size: 16px; color: var(--ink); margin-bottom: 4px; }
.contact-card p { font-size: 14.5px; color: var(--muted); }

.contact-form-panel {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 32px; box-shadow: var(--shadow-sm);
}
.contact-form-panel h2 { font-size: 21px; margin-bottom: 6px; }
.contact-form-panel > p { font-size: 14px; color: var(--muted); margin-bottom: 24px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { display: flex; flex-direction: column; gap: 7px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 14px; font-weight: 600; color: var(--ink); }
.form-field label i { color: #d92d20; font-style: normal; }
.form-field input, .form-field select, .form-field textarea {
  border: 1.5px solid var(--line); border-radius: 10px;
  padding: 11px 14px; background: #fcfdff; outline: none; width: 100%;
  transition: border-color .2s, box-shadow .2s;
}
.form-field textarea { resize: vertical; min-height: 116px; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3.5px rgba(26, 86, 219, .12);
}
.form-submit { grid-column: 1 / -1; }
.form-success {
  display: none; margin-top: 16px; padding: 13px 16px;
  background: #ecfdf3; border: 1px solid #abefc6; color: #067647;
  border-radius: 10px; font-size: 14.5px;
}
.form-success.show { display: block; }
.form-note { grid-column: 1 / -1; font-size: 12.5px; color: var(--muted); }

/* ==========================================================================
   滚动动画 & 返回顶部
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .1s; }
.reveal[data-delay="2"] { transition-delay: .2s; }
.reveal[data-delay="3"] { transition-delay: .3s; }

.back-top {
  position: fixed; right: 26px; bottom: 30px; z-index: 90;
  width: 46px; height: 46px; border-radius: 12px; border: 0;
  background: var(--primary); color: #fff; display: grid; place-items: center;
  box-shadow: 0 10px 24px rgba(26, 86, 219, .4);
  opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: opacity .3s, transform .3s, visibility .3s, background .2s;
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { background: var(--primary-700); }
.back-top svg { width: 20px; height: 20px; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .hero-inner, .overview-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero { padding: 150px 0 84px; }
  .hero-visual { max-width: 640px; }
  .brand-panel { position: static; }
  .process-grid { grid-template-columns: repeat(3, 1fr); row-gap: 34px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; color: var(--ink);
    box-shadow: 0 18px 34px rgba(13, 38, 90, .14);
    border-top: 1px solid var(--line);
    max-height: 0; overflow: hidden; transition: max-height .35s ease;
  }
  .site-nav.open { max-height: 440px; }
  .site-nav > a { padding: 15px 26px; border-bottom: 1px solid var(--line); opacity: 1; }
  .site-nav > a.active::after { display: none; }
  .site-nav > a.active { color: var(--primary); }
  .site-nav .nav-cta { margin: 16px 26px; text-align: center; border-bottom: 0; }
  .header-inner { height: 64px; }
  html { scroll-padding-top: 72px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .product-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 66px 0; }
}

@media (max-width: 620px) {
  .grid-2, .grid-3, .grid-4, .feature-grid, .scene-grid, .related-grid,
  .process-grid, .form-grid, .footer-grid { grid-template-columns: 1fr; }
  .mock-stats { grid-template-columns: repeat(3, 1fr); }
  .chip-a { right: 2%; }
  .chip-b { left: 2%; }
  .footer-bottom { justify-content: center; text-align: center; }
  .hero-actions .btn { flex: 1; }
  .adv-item { flex-direction: column; gap: 12px; }
  .back-top { right: 16px; bottom: 20px; }
}