/* ==========================================================================
   燧佑（北京）技术有限公司 — 官网全局样式
   设计体系：科技蓝 + 深空海军蓝 + 简洁留白，专业、可信、现代
   ========================================================================== */

:root {
  /* 主色 */
  --primary: #2b5cff;
  --primary-dark: #1e45d6;
  --primary-light: #eef3ff;
  --primary-glow: rgba(43, 92, 255, 0.16);

  /* 中性色 */
  --dark: #0b1220;
  --dark-2: #111a2e;
  --ink: #1f2937;
  --ink-2: #4b5563;
  --ink-3: #6b7280;
  --line: #e7ebf3;
  --bg: #f5f7fb;
  --bg-soft: #fbfcfe;

  /* 功能色 */
  --green: #16a34a;
  --green-bg: #ecfdf3;
  --orange: #ea7317;
  --orange-bg: #fff4ea;
  --emerald: #059669;
  --emerald-bg: #ecfdf5;
  --purple: #7c3aed;
  --purple-bg: #f3eefe;

  /* 排版 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
  --radius: 18px;
  --radius-sm: 12px;
  --radius-lg: 24px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(11, 18, 32, 0.04), 0 2px 8px rgba(11, 18, 32, 0.04);
  --shadow-md: 0 6px 20px rgba(11, 18, 32, 0.07);
  --shadow-lg: 0 18px 44px rgba(11, 18, 32, 0.12);
  --shadow-primary: 0 10px 24px var(--primary-glow);

  --maxw: 1200px;
  --header-h: 72px;
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: #fff;
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
::selection { background: var(--primary); color: #fff; }

/* ---------- 布局容器 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section--soft { background: var(--bg); }
.section--soft2 { background: var(--bg-soft); }

/* ---------- 排版 ---------- */
h1, h2, h3, h4 { color: var(--dark); line-height: 1.25; font-weight: 700; letter-spacing: -0.01em; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.08em;
  color: var(--primary); text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--primary); border-radius: 2px; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head--center .eyebrow::after { content: ""; width: 26px; height: 2px; background: var(--primary); border-radius: 2px; }
.section-head--center .eyebrow { justify-content: center; }
.section-head h2 { font-size: clamp(28px, 3.4vw, 40px); margin: 16px 0 14px; }
.section-head p { color: var(--ink-2); font-size: 17px; }
.text-primary { color: var(--primary); }
.text-muted { color: var(--ink-2); }

/* 数字符号：数字大、符号小（如 200+ / 99%） */
b .sym { font-size: 0.55em; font-weight: 700; margin-left: 1px; vertical-align: 0.12em; }
.gradient-text {
  background: linear-gradient(120deg, var(--primary), #7b5cff 70%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: all 0.25s ease;
  white-space: nowrap;
}
.btn i { font-size: 14px; }
.btn--primary { background: var(--primary); color: #fff; box-shadow: var(--shadow-primary); }
.btn--primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 16px 32px var(--primary-glow); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn--white { background: #fff; color: var(--dark); }
.btn--white:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--outline-white { background: transparent; color: #fff; border-color: rgba(255,255,255,0.4); }
.btn--outline-white:hover { background: rgba(255,255,255,0.1); border-color: #fff; }
.btn--sm { padding: 10px 20px; font-size: 14px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h); display: flex; align-items: center;
  background: rgba(255,255,255,0.86); backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent; transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: 100%; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--dark); }
.brand-mark {
  width: 40px; height: 40px; border-radius: 11px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), #7b5cff);
  display: grid; place-items: center; color: #fff; font-size: 20px; font-weight: 800;
  box-shadow: 0 6px 16px var(--primary-glow);
}
.brand-logo {
  width: 42px; height: 42px; border-radius: 10px; flex-shrink: 0;
  object-fit: cover; display: block; background: #fff;
}
.brand small { display: block; font-size: 11px; font-weight: 500; color: var(--ink-3); letter-spacing: 0.02em; }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--ink-2); position: relative; padding: 6px 0; transition: color 0.2s; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--primary); border-radius: 2px; transition: width 0.25s ease;
}
.nav-links a:hover, .nav-links a.is-active { color: var(--primary); }
.nav-links a:hover::after, .nav-links a.is-active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--dark); cursor: pointer; }

/* 移动端菜单 */
.mobile-menu {
  position: fixed; top: var(--header-h); left: 0; right: 0; z-index: 99;
  background: #fff; border-bottom: 1px solid var(--line);
  padding: 16px 24px 24px; display: none; box-shadow: var(--shadow-lg);
}
.mobile-menu.is-open { display: block; }
.mobile-menu a { display: block; padding: 14px 4px; font-size: 16px; font-weight: 500; color: var(--ink); border-bottom: 1px solid var(--bg); }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu .btn { margin-top: 14px; width: 100%; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: calc(var(--header-h) + 64px) 0 96px;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(43,92,255,0.14), transparent 55%),
    radial-gradient(900px 500px at -10% 20%, rgba(123,92,255,0.12), transparent 50%),
    linear-gradient(180deg, #f6f9ff, #fff);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px;
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  font-size: 13px; font-weight: 600; color: var(--ink-2); box-shadow: var(--shadow-sm);
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px var(--green-bg); }
.hero h1 { font-size: clamp(36px, 5.2vw, 58px); margin: 24px 0 20px; }
.hero p.lead { font-size: 18px; color: var(--ink-2); max-width: 560px; margin-bottom: 32px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; max-width: 680px; margin-top: 8px; }
.hero-stat { padding: 4px 0; }
.hero-stat b { display: block; font-size: clamp(40px, 4.4vw, 60px); line-height: 1.05; color: var(--primary); font-weight: 800; letter-spacing: -0.04em; }
.hero-stat b .sym { font-size: 0.5em; font-weight: 700; margin-left: 1px; vertical-align: 0.16em; }
.hero-stat > span { font-size: 14px; color: var(--ink-2); font-weight: 500; }

/* Hero 全景面板 */
.hero-visual { position: relative; display: flex; }
.hero-panel {
  position: relative; overflow: hidden; flex: 1;
  border-radius: var(--radius-lg); padding: 28px;
  background: linear-gradient(150deg, #0b1220 0%, #131d36 58%, #1b2647 100%);
  box-shadow: var(--shadow-lg);
  display: flex; flex-direction: column; gap: 18px;
}
.hero-panel::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(circle at 92% 4%, rgba(43,92,255,0.40), transparent 44%),
              radial-gradient(circle at 2% 100%, rgba(16,185,129,0.24), transparent 48%);
}
.hero-panel > * { position: relative; z-index: 1; }
.hero-panel__badge {
  display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.06em;
  color: #8fb0ff; background: rgba(43,92,255,0.16); border: 1px solid rgba(43,92,255,0.34);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 14px;
}
.hero-panel__head h3 {
  font-size: clamp(21px, 2.2vw, 28px); line-height: 1.35; color: #fff;
  margin: 0; letter-spacing: -0.01em; font-weight: 800;
}
.hero-panel__head h3 em {
  font-style: normal;
  background: linear-gradient(90deg, #6ea8ff, #8b7bff 55%, #34d399);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-panel__hub {
  display: flex; align-items: center; gap: 14px;
  background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.14);
  border-radius: 16px; padding: 14px 18px;
}
.hero-panel__hub .hub-ic {
  width: 44px; height: 44px; border-radius: 12px; flex-shrink: 0;
  display: grid; place-items: center; font-size: 20px; color: #fff;
  background: linear-gradient(135deg, #2b5cff, #7b5cff);
}
.hero-panel__hub b { display: block; font-size: 15px; color: #fff; }
.hero-panel__hub span { font-size: 12px; color: rgba(255,255,255,0.62); }
.hero-panel__tracks { display: flex; flex-direction: column; gap: 10px; }
.ptrack {
  display: flex; align-items: center; gap: 12px;
  font-size: 14.5px; font-weight: 600; color: rgba(255,255,255,0.94);
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.10);
  border-radius: 12px; padding: 10px 14px;
  transition: background 0.25s, transform 0.25s;
}
.ptrack:hover { background: rgba(255,255,255,0.12); transform: translateX(4px); }
.ptrack > i {
  width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0;
  display: grid; place-items: center; font-size: 13px; color: #fff;
}
.ptrack__num, .ptrack b {
  margin-left: auto; display: inline-flex; align-items: baseline; gap: 3px;
  font-size: 24px; font-weight: 800; letter-spacing: -0.03em; color: #fff;
}
.ptrack b em { font-style: normal; font-size: 11px; font-weight: 500; color: rgba(255,255,255,0.5); }
.ptrack--blue > i { background: linear-gradient(135deg, #2b5cff, #4f7cff); }
.ptrack--green > i { background: linear-gradient(135deg, #10b981, #059669); }
.ptrack--orange > i { background: linear-gradient(135deg, #f97316, #ea580c); }
.ptrack--emerald > i { background: linear-gradient(135deg, #059669, #0d9488); }
.ptrack--purple > i { background: linear-gradient(135deg, #7b5cff, #a855f7); }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ---------- 通用卡片 ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }

/* 赛道卡（首页入口） */
.track-card { display: flex; flex-direction: column; gap: 14px; height: 100%; }
.track-card .thumb { margin: -28px -28px 0; height: 130px; overflow: hidden; background: var(--dark-2); border-radius: var(--radius) var(--radius) 0 0; }
.track-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.track-card:hover .thumb img { transform: scale(1.06); }
.track-card .ic {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; font-size: 24px;
}
.track-card h3 { font-size: 20px; }
.track-card p { color: var(--ink-2); font-size: 14.5px; flex: 1; }
.track-card .link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.track-card .link i { transition: transform 0.25s; }
.track-card:hover .link i { transform: translateX(4px); }
.track-tag { font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px; width: fit-content; }
.track-tag .num, .count .num { font-size: 1.5em; font-weight: 800; letter-spacing: -0.02em; vertical-align: -0.06em; margin-right: 1px; }

/* 色板 */
.bg-blue { background: var(--primary-light); color: var(--primary); }
.bg-green { background: var(--green-bg); color: var(--green); }
.bg-orange { background: var(--orange-bg); color: var(--orange); }
.bg-emerald { background: var(--emerald-bg); color: var(--emerald); }
.bg-purple { background: var(--purple-bg); color: var(--purple); }

/* ---------- 能力/特性列表 ---------- */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.feature-list { display: flex; flex-direction: column; gap: 20px; }
.feature-item { display: flex; gap: 16px; }
.feature-item .ic {
  width: 46px; height: 46px; border-radius: 12px; flex-shrink: 0;
  background: var(--primary-light); color: var(--primary); display: grid; place-items: center; font-size: 20px;
}
.feature-item h4 { font-size: 17px; margin-bottom: 4px; }
.feature-item p { color: var(--ink-2); font-size: 14.5px; }

/* ---------- 流程步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step { position: relative; padding-top: 8px; }
.step .num {
  font-size: 44px; font-weight: 800; color: transparent;
  -webkit-text-stroke: 1.5px var(--primary); line-height: 1; margin-bottom: 16px;
}
.step h4 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--ink-2); font-size: 14.5px; }

/* ---------- 数据横幅 ---------- */
.stat-band { background: linear-gradient(135deg, var(--dark), var(--dark-2)); border-radius: var(--radius-lg); padding: 56px; color: #fff; }
.stat-band .grid { gap: 32px; }
.stat-band b { display: block; font-size: 58px; font-weight: 800; letter-spacing: -0.02em; }
.stat-band b .sym { font-size: 0.55em; font-weight: 700; margin-left: 1px; vertical-align: 0.12em; }
.stat-band .cell > span { color: rgba(255,255,255,0.65); font-size: 14px; }
.stat-band .cell { border-left: 1px solid rgba(255,255,255,0.12); padding-left: 32px; }
.stat-band .cell:first-child { border-left: none; padding-left: 0; }

/* ---------- 案例卡 ---------- */
.case-card { overflow: hidden; display: flex; flex-direction: column; }
.case-card .thumb { height: 200px; overflow: hidden; background: var(--dark-2); }
.case-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.case-card:hover .thumb img { transform: scale(1.06); }
.case-card .body { padding: 24px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.case-card h3 { font-size: 19px; }
.case-card p { color: var(--ink-2); font-size: 14.5px; flex: 1; }
.case-metrics { display: flex; flex-wrap: wrap; gap: 20px; border-top: 1px solid var(--line); padding-top: 16px; }
.case-metrics .m b { font-size: 36px; color: var(--primary); font-weight: 800; letter-spacing: -0.02em; }
.case-metrics .m b .sym { font-size: 0.55em; font-weight: 700; margin-left: 1px; vertical-align: 0.12em; }
.case-metrics .m > span { font-size: 12.5px; color: var(--ink-3); display: block; }

/* ---------- 行业方案卡 ---------- */
.sol-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.sol-card .thumb { height: 150px; overflow: hidden; background: var(--dark-2); }
.sol-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.sol-card:hover .thumb img { transform: scale(1.06); }
.sol-card .body { padding: 24px 26px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }

/* ---------- 折叠面板（产品详情） ---------- */
.accordion { border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; overflow: hidden; }
.accordion + .accordion { margin-top: 14px; }
.accordion summary {
  list-style: none; cursor: pointer; padding: 20px 24px; font-weight: 600; font-size: 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; color: var(--dark);
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary .ic-chev { color: var(--ink-3); transition: transform 0.3s ease; }
.accordion[open] summary { background: var(--bg-soft); }
.accordion[open] summary .ic-chev { transform: rotate(180deg); }
.accordion .acc-body { padding: 4px 24px 26px; border-top: 1px solid var(--line); }
.scene { padding: 22px 0; border-bottom: 1px solid var(--bg); }
.scene:last-child { border-bottom: none; padding-bottom: 6px; }
.scene h4 { font-size: 17px; margin-bottom: 10px; color: var(--dark); }
.scene .tag { display: inline-block; font-size: 12px; color: var(--primary); background: var(--primary-light); padding: 2px 9px; border-radius: 999px; margin-left: 8px; font-weight: 600; }
.scene p { color: var(--ink-2); font-size: 14.5px; margin-bottom: 10px; }
.scene p strong { color: var(--ink); }
.scene ol { margin: 4px 0 12px 20px; }
.scene ol li { list-style: decimal; color: var(--ink-2); font-size: 14px; margin-bottom: 4px; padding-left: 4px; }
.scene .case-note { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px 16px; font-size: 14px; color: var(--ink-2); }
.scene .case-note strong { color: var(--primary); }

/* 赛道子导航（产品页侧栏） */
.subnav { position: sticky; top: calc(var(--header-h) + 24px); }
.subnav a {
  display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: 10px;
  font-size: 14.5px; font-weight: 500; color: var(--ink-2); transition: all 0.2s;
}
.subnav a:hover { background: var(--bg); color: var(--dark); }
.subnav a .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line); transition: background 0.2s; }
.subnav a.is-active { background: var(--primary-light); color: var(--primary); }
.subnav a.is-active .dot { background: var(--primary); }

/* ---------- 产品页横向子导航 ---------- */
.subnav-horizontal {
  position: sticky; top: var(--header-h); z-index: 40;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line); padding: 14px 0; margin-bottom: 56px;
}
.subnav-horizontal .container { display: flex; gap: 10px; overflow-x: auto; scrollbar-width: none; }
.subnav-horizontal .container::-webkit-scrollbar { display: none; }
.subnav-horizontal a {
  flex-shrink: 0; display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px; border-radius: 999px; border: 1px solid var(--line);
  font-size: 14px; font-weight: 500; color: var(--ink-2); transition: all 0.2s; background: #fff;
}
.subnav-horizontal a:hover { border-color: var(--primary); color: var(--primary); }
.subnav-horizontal a.is-active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 赛道块标题 */
.track-section { scroll-margin-top: 120px; padding: 64px 0; }
.track-section + .track-section { border-top: 1px solid var(--line); }
.track-head { display: flex; gap: 20px; align-items: flex-start; margin-bottom: 32px; }
.track-head .ic { width: 62px; height: 62px; border-radius: 16px; display: grid; place-items: center; font-size: 28px; flex-shrink: 0; }
.track-head h2 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 8px; }
.track-head p { color: var(--ink-2); font-size: 16px; }

/* ---------- 关于页 ---------- */
.about-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-img img { width: 100%; height: 100%; object-fit: cover; }
.timeline { position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.timeline-item { position: relative; padding-bottom: 32px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ""; position: absolute; left: -28px; top: 6px; width: 14px; height: 14px;
  border-radius: 50%; background: #fff; border: 3px solid var(--primary);
}
.timeline-item .year { font-weight: 800; color: var(--primary); font-size: 15px; }
.timeline-item h4 { font-size: 17px; margin: 4px 0 6px; }
.timeline-item p { color: var(--ink-2); font-size: 14.5px; }
.value-card { text-align: left; }
.value-card .ic { width: 50px; height: 50px; border-radius: 13px; display: grid; place-items: center; font-size: 22px; margin-bottom: 16px; }
.value-card h3 { font-size: 18px; margin-bottom: 8px; }
.value-card p { color: var(--ink-2); font-size: 14.5px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 28px; }
.contact-info-card {
  background: linear-gradient(160deg, var(--dark), #16203c); color: #fff;
  border-radius: var(--radius-lg); padding: 40px; display: flex; flex-direction: column; gap: 24px;
}
.contact-info-card h3 { color: #fff; font-size: 24px; }
.contact-info-card > p { color: rgba(255,255,255,0.7); font-size: 15px; }
.contact-row { display: flex; gap: 14px; align-items: flex-start; }
.contact-row .ic {
  width: 44px; height: 44px; border-radius: 12px; background: rgba(255,255,255,0.12);
  display: grid; place-items: center; font-size: 18px; flex-shrink: 0;
}
.contact-row b { display: block; font-size: 15px; }
.contact-row span { color: rgba(255,255,255,0.65); font-size: 13px; display: block; }
.contact-row a:hover { text-decoration: underline; }

.qr-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 36px; text-align: center; }
.qr-frame {
  width: 200px; height: 200px; margin: 0 auto 20px; border-radius: 16px;
  border: 1px solid var(--line); background: #fff; position: relative;
  display: grid; place-items: center; overflow: hidden;
}
.qr-frame img { width: 100%; height: 100%; object-fit: contain; }
.qr-frame .qr-placeholder {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  color: var(--ink-3); font-size: 13px; background: repeating-conic-gradient(#f7f9fc 0 25%, #fff 0 50%) 0 0/20px 20px;
}
.qr-frame .qr-placeholder i { font-size: 44px; color: var(--primary); opacity: 0.5; }

/* 表单 */
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 40px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 600; color: var(--ink); }
.field label em { color: #e11d48; font-style: normal; }
.field input, .field select, .field textarea {
  padding: 13px 16px; border: 1px solid var(--line); border-radius: 12px; font-size: 15px;
  color: var(--ink); background: var(--bg-soft); transition: border-color 0.2s, box-shadow 0.2s; outline: none;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); background: #fff;
}
.field .hint { font-size: 12px; color: var(--ink-3); }
.form-submit { display: flex; align-items: center; gap: 14px; margin-top: 22px; flex-wrap: wrap; }
.form-submit .note { font-size: 12.5px; color: var(--ink-3); }

/* 提示条 toast */
.toast {
  position: fixed; bottom: 32px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--dark); color: #fff; padding: 14px 24px; border-radius: 12px;
  box-shadow: var(--shadow-lg); font-size: 15px; z-index: 200; opacity: 0; pointer-events: none;
  transition: all 0.3s ease; display: flex; align-items: center; gap: 10px; max-width: 90vw;
}
.toast.is-show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast i { color: #4ade80; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); color: #fff; padding: 72px 0 0; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 48px; }
.footer-brand p { color: rgba(255,255,255,0.55); font-size: 14px; margin-top: 16px; max-width: 320px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 18px; }
.site-footer ul li { margin-bottom: 12px; }
.site-footer ul a, .site-footer ul span { color: rgba(255,255,255,0.55); font-size: 14px; transition: color 0.2s; }
.site-footer ul a:hover { color: #fff; }
.footer-qr { display: flex; gap: 16px; align-items: flex-start; }
.footer-qr .qr-frame { width: 96px; height: 96px; margin: 0; border-color: rgba(255,255,255,0.15); }
.footer-qr p { color: rgba(255,255,255,0.55); font-size: 13px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 22px 0; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-bottom p { color: rgba(255,255,255,0.45); font-size: 13px; }
.footer-bottom .links { display: flex; gap: 20px; }
.footer-bottom .links a { color: rgba(255,255,255,0.45); font-size: 13px; }
.footer-bottom .links a:hover { color: #fff; }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed; right: 28px; bottom: 28px; width: 46px; height: 46px; border-radius: 50%;
  background: var(--primary); color: #fff; border: none; font-size: 18px; cursor: pointer;
  box-shadow: var(--shadow-primary); opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all 0.3s ease; z-index: 90;
}
.back-top.is-show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--primary-dark); }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- 页面头部（内页 banner） ---------- */
.page-hero {
  position: relative; overflow: hidden;
  padding: calc(var(--header-h) + 72px) 0 72px;
  background:
    radial-gradient(900px 420px at 80% -20%, rgba(43,92,255,0.16), transparent 55%),
    linear-gradient(180deg, #f6f9ff, #fff);
}
.page-hero h1 { font-size: clamp(32px, 4.6vw, 50px); margin: 18px 0 16px; }
.page-hero p { color: var(--ink-2); font-size: 18px; max-width: 720px; }
.breadcrumb { font-size: 13px; color: var(--ink-3); display: flex; align-items: center; gap: 8px; }
.breadcrumb a { color: var(--ink-3); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { opacity: 0.5; }

/* ---------- 赛道详情页 ---------- */
.track-hero { position: relative; overflow: hidden; padding: calc(var(--header-h) + 48px) 0 0; }
.track-hero-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; padding-bottom: 56px; }
.track-hero h1 { font-size: clamp(30px, 4.4vw, 46px); margin: 16px 0 16px; }
.track-hero .lead { color: var(--ink-2); font-size: 17px; max-width: 560px; }
.track-hero .media { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); background: var(--dark-2); }
.track-hero .media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16/10; }
.track-hero .mini-stats { display: flex; gap: 28px; margin-top: 28px; flex-wrap: wrap; }
.track-hero .mini-stats b { display: block; font-size: 42px; color: var(--dark); font-weight: 800; letter-spacing: -0.02em; }
.track-hero .mini-stats b .sym { font-size: 0.5em; font-weight: 700; margin-left: 1px; vertical-align: 0.16em; }
.track-hero .mini-stats > div > span { font-size: 13px; color: var(--ink-3); }

/* 分组块（图文） */
.group-block { padding: 60px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 120px; }
.group-block:last-of-type { border-bottom: none; }
.group-head { display: grid; grid-template-columns: 320px 1fr; gap: 40px; align-items: center; margin-bottom: 32px; }
.group-head .media { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; background: var(--dark-2); box-shadow: var(--shadow-sm); }
.group-head .media img { width: 100%; height: 100%; object-fit: cover; }
.group-head h2 { font-size: 24px; margin-bottom: 10px; }
.group-head h2 .num { color: var(--primary); margin-right: 10px; }
.group-head p { color: var(--ink-2); font-size: 15px; }
.group-head .count { display: inline-block; font-size: 12px; font-weight: 600; color: var(--primary); background: var(--primary-light); padding: 3px 10px; border-radius: 999px; margin-bottom: 10px; }

/* 场景卡片（图+文可展开） */
.scene-ic {
  width: 44px; height: 44px; border-radius: 12px; flex-shrink: 0;
  background: var(--primary-light); color: var(--primary);
  display: grid; place-items: center; font-size: 19px; margin-top: 2px;
}

/* 场景图文卡（制造/能碳/机器人用） */
.scene-photo { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.scene-photo .thumb { height: 150px; overflow: hidden; background: var(--dark-2); }
.scene-photo .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.scene-photo:hover .thumb img { transform: scale(1.05); }
.scene-photo .body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }

/* 场景内配图（语音/通信 accordion 展开区） */
.scene-media { border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 16px; aspect-ratio: 16/7; background: var(--dark-2); }
.scene-media img { width: 100%; height: 100%; object-fit: cover; }

/* 详情页 Tab 切换 */
.tab-nav {
  display: flex; gap: 4px; flex-wrap: wrap; align-items: center;
  border-bottom: 1px solid var(--line); position: sticky; top: calc(var(--header-h) + 58px); z-index: 30;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(8px); margin-bottom: 0;
}
.tab-btn {
  padding: 13px 18px; font-size: 14.5px; font-weight: 600; color: var(--ink-2);
  background: none; border: none; border-bottom: 2px solid transparent; cursor: pointer;
  white-space: nowrap; transition: color 0.2s, border-color 0.2s;
}
.tab-btn:hover { color: var(--primary); }
.tab-btn.is-active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; }
.tab-panel .group-block:first-child { padding-top: 40px; }

/* ==========================================================================
   行业折叠卡片（赛道详情页：图文卡片，默认收起，点击展开详细说明）
   ========================================================================== */
.ind-list { display: flex; flex-direction: column; gap: 18px; }
.ind-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; overflow: hidden; scroll-margin-top: calc(var(--header-h) + 20px);
  transition: box-shadow .3s ease, border-color .3s ease;
}
.ind-card:hover { border-color: #cfd8ee; }
.ind-card[open] { border-color: transparent; box-shadow: var(--shadow-md); }
.ind-card > summary {
  list-style: none; cursor: pointer;
  display: flex; align-items: stretch;
}
.ind-card > summary::-webkit-details-marker { display: none; }

/* 卡片缩略图 */
.ind-card .ind-thumb {
  width: 212px; flex-shrink: 0; position: relative;
  background: var(--dark-2); overflow: hidden;
}
.ind-card .ind-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.ind-card:hover .ind-thumb img { transform: scale(1.06); }
.ind-card .ind-thumb::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(11,18,32,.30));
}

/* 卡片主体 */
.ind-card .ind-main {
  flex: 1; min-width: 0; padding: 20px 22px;
  display: flex; flex-direction: column; justify-content: center; gap: 9px;
}
.ind-card .ind-title-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.ind-card .ind-title-row h3 { font-size: 20px; }
.ind-card .ind-badge {
  font-size: 12px; font-weight: 600; padding: 3px 11px; border-radius: 999px;
  display: inline-flex; align-items: center; gap: 4px;
}
.ind-card .ind-badge .num { font-size: 1.25em; font-weight: 800; }
.ind-card .ind-oneline { color: var(--ink-2); font-size: 14px; }
.ind-card .ind-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.ind-card .ind-tags span {
  font-size: 12.5px; padding: 3px 11px; border-radius: 999px;
  background: var(--bg); color: var(--ink-2); border: 1px solid var(--line);
}

/* 展开开关 */
.ind-card .ind-toggle {
  flex-shrink: 0; align-self: center; margin-right: 26px;
  display: inline-flex; align-items: center; gap: 9px;
  color: var(--ink-3); font-size: 13px; font-weight: 600;
}
.ind-card .ind-toggle .chev {
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--bg); border: 1px solid var(--line);
  transition: transform .3s ease, background .25s, color .25s;
}
.ind-card:hover .ind-toggle .chev { background: var(--primary-light); color: var(--primary); }
.ind-card[open] .ind-toggle .chev { transform: rotate(180deg); background: var(--primary); color: #fff; border-color: var(--primary); }
.ind-card[open] .ind-toggle .txt-open { display: none; }
.ind-card:not([open]) .ind-toggle .txt-close { display: none; }

/* 展开内容区 */
.ind-card .ind-body {
  border-top: 1px solid var(--line);
  padding: 26px 28px 30px;
  background: linear-gradient(180deg, var(--bg-soft), #fff 240px);
}

/* 行业概述图文块 */
.ind-overview { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 22px; }
.ind-ov { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px 18px; }
.ind-ov h5 { font-size: 13px; font-weight: 700; margin-bottom: 7px; display: flex; align-items: center; gap: 9px; }
.ind-ov h5 i { width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; font-size: 12px; flex-shrink: 0; }
.ind-ov p { font-size: 14px; color: var(--ink-2); margin: 0; }
.ind-ov--pain h5 { color: #e11d48; }
.ind-ov--pain h5 i { background: #ffe4e6; color: #e11d48; }
.ind-ov--plan h5 { color: var(--primary); }
.ind-ov--plan h5 i { background: var(--primary-light); color: var(--primary); }
.ind-ov--val h5 { color: var(--green); }
.ind-ov--val h5 i { background: var(--green-bg); color: var(--green); }
.ind-ov--ind h5 { color: var(--purple); }
.ind-ov--ind h5 i { background: var(--purple-bg); color: var(--purple); }

/* 核心指标条 */
.ind-metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 26px; }
.ind-metric {
  text-align: center; padding: 18px 10px 15px;
  border-radius: var(--radius-sm); border: 1px solid var(--line); background: #fff;
}
.ind-metric b {
  display: block; font-size: clamp(22px, 2.2vw, 28px); font-weight: 800;
  color: var(--primary); letter-spacing: -0.02em; line-height: 1.1;
}
.ind-metric b .sym { font-size: .55em; font-weight: 700; vertical-align: .12em; }
.ind-metric span { display: block; font-size: 12.5px; color: var(--ink-3); margin-top: 5px; }
.ind-metric--green b { color: var(--green); }
.ind-metric--orange b { color: var(--orange); }
.ind-metric--emerald b { color: var(--emerald); }
.ind-metric--purple b { color: var(--purple); }

/* 展开区内场景列表标题 */
.ind-scene-label {
  font-size: 13.5px; font-weight: 700; color: var(--ink-3);
  margin-bottom: 14px; display: flex; align-items: center; gap: 9px;
}
.ind-scene-label::before { content: ""; width: 4px; height: 15px; border-radius: 2px; background: var(--primary); }
.ind-scene-label::after { content: ""; flex: 1; height: 1px; background: var(--line); }

/* 场景详情要点（详细化：适用场景/核心技术/核心价值） */
.scene-points { display: grid; grid-template-columns: 1fr; gap: 14px; margin-top: 14px; }
.scene-list { display: block; }
.acc-body .scene-points { grid-template-columns: repeat(2, 1fr); }
.scene-point { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px 16px; }
.scene-point h5 { font-size: 13px; color: var(--primary); margin-bottom: 6px; display: flex; align-items: center; gap: 6px; }
.scene-point h5 i { font-size: 13px; }
.scene-point p { font-size: 14px; color: var(--ink-2); margin: 0; }

/* 能力矩阵卡 */
.cap-card { text-align: left; }
.cap-card .ic { width: 50px; height: 50px; border-radius: 13px; display: grid; place-items: center; font-size: 22px; margin-bottom: 14px; }
.cap-card h3 { font-size: 17px; margin-bottom: 8px; }
.cap-card p { color: var(--ink-2); font-size: 14px; }

/* 总览赛道大卡 */
.track-big { overflow: hidden; display: flex; flex-direction: column; }
.track-big .media { height: 200px; overflow: hidden; background: var(--dark-2); }
.track-big .media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.track-big:hover .media img { transform: scale(1.06); }
.track-big .body { padding: 26px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.track-big .body h3 { font-size: 21px; }
.track-big .body p { color: var(--ink-2); font-size: 14.5px; flex: 1; }
.track-big .tags { display: flex; flex-wrap: wrap; gap: 8px; }
.track-big .tags span { font-size: 12px; padding: 4px 10px; border-radius: 999px; background: var(--bg); color: var(--ink-2); }

/* 详情页底部翻页导航 */
.page-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 48px; }
.page-nav a { display: flex; align-items: center; gap: 14px; padding: 22px 24px; border: 1px solid var(--line); border-radius: var(--radius); transition: all 0.25s; }
.page-nav a:hover { border-color: var(--primary); box-shadow: var(--shadow-md); }
.page-nav a.next { flex-direction: row-reverse; text-align: right; }
.page-nav .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-size: 19px; flex-shrink: 0; }
.page-nav b { display: block; font-size: 16px; color: var(--dark); }
.page-nav span { font-size: 13px; color: var(--ink-3); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 560px; }
  .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .feature-row { grid-template-columns: 1fr; gap: 32px; }
  .ind-metrics { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-links, .nav-actions .btn { display: none; }
  .nav-toggle { display: inline-flex; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .acc-body .scene-points { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .stat-band { padding: 36px 24px; }
  .stat-band .cell { border-left: none; padding-left: 0; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.12); }
  .stat-band .cell:first-child { border-top: none; padding-top: 0; }
  .form-grid { grid-template-columns: 1fr; }
  .form-card, .contact-info-card { padding: 26px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .hero-float { display: none; }
  .page-hero { padding: calc(var(--header-h) + 56px) 0 56px; }
  .track-hero-inner { grid-template-columns: 1fr; gap: 28px; }
  .track-hero .media { order: -1; }
  .group-head { grid-template-columns: 1fr; gap: 20px; }
  .group-head .media { aspect-ratio: 16/9; }
  .page-nav { grid-template-columns: 1fr; }
  .ind-card .ind-thumb { width: 128px; }
  .ind-card .ind-main { padding: 14px 14px; gap: 6px; }
  .ind-card .ind-toggle { margin-right: 14px; }
  .ind-card .ind-toggle .txt-open, .ind-card .ind-toggle .txt-close { display: none; }
  .ind-overview { grid-template-columns: 1fr; }
  .ind-card .ind-body { padding: 20px 16px 24px; }
}

@media (max-width: 480px) {
  .ind-card .ind-thumb { width: 96px; }
  .ind-metrics { grid-template-columns: 1fr 1fr; gap: 10px; }
}

/* ---------- 法律条款页（隐私政策 / 服务条款） ---------- */
.legal { max-width: 880px; margin: 0 auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 48px 52px; }
.legal .meta { font-size: 13px; color: var(--ink-3); margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.legal h2 { font-size: 20px; font-weight: 800; color: var(--dark); margin: 34px 0 12px; }
.legal h2:first-of-type { margin-top: 0; }
.legal h3 { font-size: 15.5px; font-weight: 700; color: var(--dark); margin: 20px 0 8px; }
.legal p { color: var(--ink-2); font-size: 15px; line-height: 1.9; margin-bottom: 12px; }
.legal ul { list-style: disc; padding-left: 22px; margin: 8px 0 14px; }
.legal li { color: var(--ink-2); font-size: 15px; line-height: 1.9; }
.legal strong { color: var(--ink); font-weight: 700; }
.legal a { color: var(--primary); }
.legal a:hover { text-decoration: underline; }
@media (max-width: 768px) {
  .legal { padding: 32px 22px; }
  .legal h2 { font-size: 18px; }
}

/* ==========================================================================
   技术底座页 technology.html
   ========================================================================== */

/* 全景分层架构（端-边-云-应用） */
.tech-stack { display: flex; flex-direction: column; gap: 14px; }
.tech-layer {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 26px; background: #fff;
  display: grid; grid-template-columns: 150px 1fr; gap: 20px; align-items: center;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.tech-layer:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.tech-layer__label { display: flex; flex-direction: column; gap: 6px; font-weight: 800; color: var(--dark); }
.tech-layer__label .ic { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; font-size: 19px; }
.tech-layer__label small { font-size: 12px; font-weight: 500; color: var(--ink-3); }
.tech-layer__items { display: flex; flex-wrap: wrap; gap: 10px; }
.tech-layer__items span {
  font-size: 13px; padding: 7px 14px; border-radius: 999px;
  background: var(--bg); color: var(--ink-2); border: 1px solid var(--line);
}

/* 引擎大区块 */
.engine { scroll-margin-top: 110px; padding: 72px 0; border-top: 1px solid var(--line); }
.engine:first-of-type { border-top: none; }
.engine-head { display: flex; gap: 22px; align-items: flex-start; margin-bottom: 36px; }
.engine-head__ic {
  width: 64px; height: 64px; border-radius: 18px; flex-shrink: 0;
  display: grid; place-items: center; font-size: 28px; color: #fff;
}
.engine-head__no { font-size: 13px; font-weight: 700; letter-spacing: 0.1em; color: var(--primary); }
.engine-head h2 { font-size: clamp(24px, 3vw, 32px); margin: 4px 0 8px; }
.engine-head p { color: var(--ink-2); font-size: 16px; max-width: 760px; }

/* 引擎能力模块 */
.engine-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-bottom: 28px; }
.engine-cap {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 26px; background: #fff;
  display: flex; flex-direction: column; gap: 10px; transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.engine-cap:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.engine-cap__top { display: flex; align-items: center; gap: 12px; }
.engine-cap__top .ic { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; font-size: 18px; flex-shrink: 0; }
.engine-cap h4 { font-size: 17px; }
.engine-cap p { color: var(--ink-2); font-size: 14.5px; }
.engine-cap ul { display: flex; flex-direction: column; gap: 6px; margin-top: 2px; }
.engine-cap ul li { color: var(--ink-2); font-size: 14px; padding-left: 18px; position: relative; }
.engine-cap ul li::before { content: "\f00c"; font-family: "Font Awesome 6 Free"; font-weight: 900; position: absolute; left: 0; top: 1px; color: var(--primary); font-size: 11px; }

/* 引擎技术架构（流程式分层） */
.arch-flow { display: flex; flex-direction: column; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin-bottom: 28px; }
.arch-flow__row { display: grid; grid-template-columns: 170px 1fr; gap: 18px; padding: 18px 26px; background: #fff; align-items: center; }
.arch-flow__row:nth-child(even) { background: var(--bg-soft); }
.arch-flow__row b { font-size: 15px; color: var(--dark); display: flex; align-items: center; gap: 10px; }
.arch-flow__row b .n { width: 26px; height: 26px; border-radius: 8px; background: var(--primary-light); color: var(--primary); display: grid; place-items: center; font-size: 13px; font-weight: 800; }
.arch-flow__row span { color: var(--ink-2); font-size: 14.5px; }

/* 技术指标表 */
.spec-table { width: 100%; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin-bottom: 28px; border-collapse: separate; border-spacing: 0; }
.spec-table .spec-row { display: grid; grid-template-columns: 1.1fr 1fr; }
.spec-table .spec-row:nth-child(even) { background: var(--bg-soft); }
.spec-table .spec-row > div { padding: 14px 26px; font-size: 14.5px; }
.spec-table .spec-row .k { color: var(--ink-2); border-right: 1px solid var(--line); }
.spec-table .spec-row .v { color: var(--dark); font-weight: 600; }
.spec-table .spec-row .v .hl { color: var(--primary); }

/* 引擎底部：场景 + 价值 */
.engine-bottom { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.engine-scenes, .engine-values { border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 26px; background: #fff; }
.engine-scenes h4, .engine-values h4 { font-size: 16px; margin-bottom: 14px; display: flex; align-items: center; gap: 9px; }
.engine-scenes h4 .ic, .engine-values h4 .ic { color: var(--primary); }
.engine-scenes .chips { display: flex; flex-wrap: wrap; gap: 9px; }
.engine-scenes .chips span { font-size: 13px; padding: 6px 13px; border-radius: 999px; background: var(--bg); color: var(--ink-2); border: 1px solid var(--line); }
.engine-values .vlist { display: flex; flex-direction: column; gap: 14px; }
.engine-values .vitem { display: flex; gap: 12px; align-items: flex-start; }
.engine-values .vitem .big { font-size: 22px; font-weight: 800; color: var(--primary); line-height: 1.1; white-space: nowrap; min-width: 84px; }
.engine-values .vitem p { font-size: 13.5px; color: var(--ink-2); }

/* 技术页锚点导航 */
.tech-anchor {
  position: sticky; top: var(--header-h); z-index: 40;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line); padding: 13px 0;
}
.tech-anchor .container { display: flex; gap: 10px; overflow-x: auto; scrollbar-width: none; }
.tech-anchor .container::-webkit-scroll-scrollbar { display: none; }
.tech-anchor a {
  flex-shrink: 0; display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 16px; border-radius: 999px; border: 1px solid var(--line);
  font-size: 13.5px; font-weight: 500; color: var(--ink-2); background: #fff; transition: all 0.2s;
}
.tech-anchor a:hover { border-color: var(--primary); color: var(--primary); }
.tech-anchor a.is-active { background: var(--primary); border-color: var(--primary); color: #fff; }

@media (max-width: 900px) {
  .tech-layer { grid-template-columns: 1fr; gap: 12px; }
  .engine-grid, .engine-bottom { grid-template-columns: 1fr; }
  .arch-flow__row, .spec-table .spec-row { grid-template-columns: 1fr; gap: 6px; }
  .arch-flow__row b, .spec-table .spec-row .k { border-right: none; }
}