/* ==========================================================================
   天津慧聚云眸科技有限公司 —— 官方网站样式表
   品牌色取自企业 Logo：科技蓝 (#1667d6) → 活力橙 (#ff8a1f)
   ========================================================================== */

:root {
  --brand: #1667d6;
  --brand-dark: #0d4bab;
  --brand-deep: #08203f;
  --brand-soft: #e8f1fd;
  --brand-line: #cfe0f8;
  --accent: #ff8a1f;
  --accent-dark: #e8730a;
  --ink: #0f172a;
  --text: #2b3a52;
  --muted: #64748b;
  --line: #e4eaf3;
  --bg: #f7fafd;
  --white: #ffffff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(15, 39, 78, .06);
  --shadow: 0 12px 32px rgba(15, 39, 78, .10);
  --shadow-lg: 0 24px 60px rgba(15, 39, 78, .16);
  --wrap: 1200px;
  --header-h: 72px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC",
    "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: var(--brand); text-decoration: none; transition: color .2s, opacity .2s; }
a:hover { color: var(--brand-dark); }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; color: var(--ink); line-height: 1.3; font-weight: 700; }
p { margin: 0 0 1em; }
button, input, textarea, select { font: inherit; color: inherit; }

::selection { background: var(--brand); color: #fff; }

/* ---------- 通用布局 ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.section { padding: 92px 0; position: relative; }
.section--tight { padding: 64px 0; }
.section--gray { background: var(--bg); }
.section--dark { background: var(--brand-deep); color: #cbd9ee; }
.section--dark h2, .section--dark h3, .section--dark h4 { color: #fff; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--brand);
  background: var(--brand-soft); border: 1px solid var(--brand-line);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 18px;
}
.section--dark .eyebrow { color: #8ec1ff; background: rgba(120, 175, 255, .12); border-color: rgba(120, 175, 255, .28); }
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

.section-head { max-width: 780px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 40px); letter-spacing: -.01em; }
.section-head p { font-size: 17px; color: var(--muted); margin: 16px 0 0; }
.section--dark .section-head p { color: #a9c0e0; }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; border: 1px solid transparent;
  font-size: 15px; font-weight: 600; cursor: pointer; white-space: nowrap;
  transition: transform .2s, box-shadow .2s, background .2s, color .2s, border-color .2s;
}
.btn-primary { background: linear-gradient(120deg, var(--brand) 0%, var(--brand-dark) 100%); color: #fff; box-shadow: 0 10px 24px rgba(22, 103, 214, .28); }
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 16px 32px rgba(22, 103, 214, .34); }
.btn-accent { background: linear-gradient(120deg, #ffa03c 0%, var(--accent) 60%, var(--accent-dark) 100%); color: #fff; box-shadow: 0 10px 24px rgba(255, 138, 31, .3); }
.btn-accent:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 16px 32px rgba(255, 138, 31, .38); }
.btn-ghost { background: rgba(255, 255, 255, .08); color: #fff; border-color: rgba(255, 255, 255, .4); backdrop-filter: blur(6px); }
.btn-ghost:hover { background: #fff; color: var(--brand-deep); }
.btn-outline { background: #fff; color: var(--brand); border-color: var(--brand-line); }
.btn-outline:hover { border-color: var(--brand); background: var(--brand-soft); }
.btn-sm { padding: 10px 20px; font-size: 14px; }

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

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .25s, border-color .25s, background .25s;
}
.site-header.is-scrolled { border-color: var(--line); box-shadow: 0 6px 24px rgba(15, 39, 78, .07); }
.site-header .wrap { display: flex; align-items: center; gap: 18px; }

.brand { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand img { width: 42px; height: 42px; border-radius: 50%; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 17px; color: var(--ink); letter-spacing: .01em; font-weight: 800; }
.brand-text span { font-size: 11px; color: var(--muted); letter-spacing: .06em; text-transform: uppercase; }

.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative; padding: 10px 15px; border-radius: 8px;
  font-size: 15px; font-weight: 500; color: var(--text);
}
.nav a:hover { color: var(--brand); background: var(--brand-soft); }
.nav a.active { color: var(--brand); font-weight: 700; }
.nav a.active::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 4px;
  height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--brand), var(--accent));
}
.header-cta { margin-left: 10px; }

.nav-toggle {
  display: none; margin-left: auto; width: 44px; height: 44px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff; cursor: pointer;
  position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  position: absolute; left: 50%; top: 50%; width: 18px; height: 2px; background: var(--ink);
  border-radius: 2px; transform: translate(-50%, -50%); transition: transform .2s, opacity .2s;
}
.nav-toggle span::before { content: ""; left: 0; top: -6px; transform: none; }
.nav-toggle span::after { content: ""; left: 0; top: 6px; transform: none; }
.nav-open .nav-toggle span { background: transparent; }
.nav-open .nav-toggle span::before { transform: rotate(45deg); top: 0; }
.nav-open .nav-toggle span::after { transform: rotate(-45deg); top: 0; }

/* ---------- 首页主视觉 ---------- */
.hero {
  position: relative; padding: calc(var(--header-h) + 92px) 0 96px;
  background: var(--brand-deep); color: #d7e4f7; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: url("../img/demo-guard.jpg") center 30% / cover no-repeat;
  opacity: .38; transform: scale(1.02);
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(1200px 480px at 12% 8%, rgba(22, 103, 214, .55), transparent 62%),
    linear-gradient(105deg, rgba(6, 20, 40, .95) 0%, rgba(8, 32, 63, .88) 46%, rgba(8, 32, 63, .58) 100%);
}
.hero .wrap { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); gap: 56px; align-items: center; }

.hero h1 {
  color: #fff; font-size: clamp(32px, 4.4vw, 56px); line-height: 1.16;
  letter-spacing: -.02em; margin-bottom: 22px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, #7ec2ff 0%, #ffb35c 60%, #ff8a1f 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-lead { font-size: 18px; color: #b9cdea; max-width: 620px; margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px; margin-bottom: 24px;
  padding: 7px 16px 7px 8px; border-radius: 999px;
  background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .22);
  font-size: 13px; color: #dbe9ff; backdrop-filter: blur(6px);
}
.hero-badge b { background: linear-gradient(120deg, #ffa03c, #ff8a1f); color: #fff; padding: 3px 10px; border-radius: 999px; font-size: 12px; }

.hero-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; max-width: 560px; }
.hero-metrics .num { font-size: 30px; font-weight: 800; color: #fff; line-height: 1.1; }
.hero-metrics .num i { font-style: normal; font-size: 16px; color: var(--accent); }
.hero-metrics .lbl { font-size: 13px; color: #9fb8db; margin-top: 4px; }

.hero-visual { position: relative; }
.hero-visual .shot {
  border-radius: 18px; overflow: hidden; border: 1px solid rgba(255, 255, 255, .18);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .45); background: #0b1c33;
}
.hero-visual .shot img { width: 100%; }
.hero-visual .float-card {
  position: absolute; left: -26px; bottom: -26px; min-width: 214px;
  background: rgba(255, 255, 255, .96); color: var(--ink); border-radius: 14px;
  padding: 16px 18px; box-shadow: var(--shadow-lg);
}
.hero-visual .float-card .t { font-size: 12px; color: var(--muted); letter-spacing: .08em; }
.hero-visual .float-card .v { font-size: 22px; font-weight: 800; color: var(--brand); }
.hero-visual .float-card .d { font-size: 13px; color: var(--muted); }
.hero-visual .float-card .bar { height: 6px; border-radius: 6px; background: var(--brand-soft); margin-top: 10px; overflow: hidden; }
.hero-visual .float-card .bar i { display: block; height: 100%; width: 0; border-radius: 6px; background: linear-gradient(90deg, var(--brand), var(--accent)); transition: width 1.4s ease .3s; }
.hero-visual .float-card.in .bar i { width: 92%; }

/* ---------- 信任条 ---------- */
.logo-strip { background: #fff; border-bottom: 1px solid var(--line); padding: 26px 0; }
.logo-strip .inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 12px 40px; }
.logo-strip .cap { font-size: 13px; color: var(--muted); letter-spacing: .1em; }
.logo-strip .item { font-size: 15px; font-weight: 700; color: #93a4bd; letter-spacing: .02em; }

/* ---------- 卡片 ---------- */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 28px; box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--brand-line); }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; margin: 0; }
.card .icon {
  width: 52px; height: 52px; border-radius: 14px; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center; font-size: 24px;
  background: linear-gradient(135deg, var(--brand-soft), #fff);
  border: 1px solid var(--brand-line);
}
.card--dark { background: rgba(255, 255, 255, .05); border-color: rgba(255, 255, 255, .12); box-shadow: none; }
.card--dark:hover { background: rgba(255, 255, 255, .08); border-color: rgba(126, 194, 255, .4); }
.card--dark h3 { color: #fff; }
.card--dark p { color: #a9c0e0; }
.card--dark .icon { background: rgba(120, 175, 255, .12); border-color: rgba(120, 175, 255, .25); }

.card-num { font-size: 13px; font-weight: 800; color: var(--brand); letter-spacing: .12em; margin-bottom: 14px; }

/* ---------- 产品卡 ---------- */
.product-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column; box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product-card .thumb {
  aspect-ratio: 4 / 3; background: #f1f5fb; overflow: hidden; display: flex; align-items: center; justify-content: center;
}
.product-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.product-card:hover .thumb img { transform: scale(1.06); }
.product-card .body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.product-card h3 { font-size: 19px; margin-bottom: 8px; }
.product-card .sub { font-size: 13px; color: var(--accent); font-weight: 700; letter-spacing: .06em; margin-bottom: 10px; }
.product-card p { font-size: 14.5px; color: var(--muted); }
.spec-list { margin-top: auto; padding-top: 16px; border-top: 1px dashed var(--line); font-size: 14px; }
.spec-list li { display: flex; gap: 10px; color: var(--muted); padding: 3px 0; }
.spec-list li::before { content: "▪"; color: var(--brand); }
.spec-list li b { color: var(--ink); font-weight: 600; }

/* ---------- 场景 tab ---------- */
.tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.tab {
  padding: 10px 20px; border-radius: 999px; border: 1px solid var(--line); background: #fff;
  font-size: 15px; cursor: pointer; transition: all .2s;
}
.tab:hover { border-color: var(--brand-line); color: var(--brand); }
.tab.active { background: var(--brand); border-color: var(--brand); color: #fff; box-shadow: 0 8px 20px rgba(22, 103, 214, .25); }
.tab-panel { display: none; animation: fadeUp .45s ease both; }
.tab-panel.active { display: block; }
.tab-panel .split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 44px; align-items: center; }
.tab-panel .shot { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); }
.tab-panel h3 { font-size: 24px; margin-bottom: 14px; }
.tab-panel .pain {
  margin: 0 0 18px; padding: 14px 18px; border-left: 3px solid var(--accent);
  background: #fff8ef; border-radius: 0 10px 10px 0; font-size: 14.5px; color: #8a5a1c;
}
.tab-panel ul.check li { position: relative; padding-left: 28px; margin-bottom: 10px; font-size: 15px; }
.tab-panel ul.check li::before {
  content: "✓"; position: absolute; left: 0; top: 0; width: 19px; height: 19px; margin-top: 4px;
  border-radius: 50%; background: var(--brand-soft); color: var(--brand);
  font-size: 12px; font-weight: 800; display: flex; align-items: center; justify-content: center;
}

/* ---------- 数据统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border-radius: var(--radius); overflow: hidden; }
.stats .item { background: #fff; padding: 34px 24px; text-align: center; }
.stats .num { font-size: clamp(28px, 3.6vw, 42px); font-weight: 800; color: var(--brand); line-height: 1.1; }
.stats .num small { font-size: 16px; color: var(--accent); font-weight: 700; }
.stats .lbl { color: var(--muted); font-size: 14px; margin-top: 8px; }
.section--dark .stats { background: rgba(255, 255, 255, .12); }
.section--dark .stats .item { background: rgba(255, 255, 255, .04); }
.section--dark .stats .num { color: #fff; }
.section--dark .stats .lbl { color: #a9c0e0; }

/* ---------- 技术架构 ---------- */
.arch { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.arch .layer { border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; background: #fff; position: relative; }
.arch .layer::before {
  content: attr(data-step); position: absolute; right: 20px; top: 14px;
  font-size: 34px; font-weight: 800; color: var(--brand-soft); letter-spacing: -.04em;
}
.arch .layer h4 { font-size: 18px; margin-bottom: 12px; }
.arch .layer p { font-size: 14.5px; color: var(--muted); margin: 0; }
.arch .flow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 26px; }
.arch .flow div {
  text-align: center; padding: 14px 8px; border-radius: 12px; font-size: 14px; font-weight: 600;
  background: var(--brand-soft); color: var(--brand-dark); border: 1px dashed var(--brand-line);
}

/* ---------- 列表式内容 ---------- */
.feature-rows { display: grid; gap: 0; border-top: 1px solid var(--line); }
.feature-row { display: grid; grid-template-columns: 92px minmax(0, 1fr) minmax(0, 1.1fr); gap: 28px; padding: 30px 0; border-bottom: 1px solid var(--line); align-items: start; }
.feature-row .idx { font-size: 15px; font-weight: 800; color: var(--brand); letter-spacing: .1em; padding-top: 4px; }
.feature-row h3 { font-size: 20px; margin-bottom: 6px; }
.feature-row .desc { color: var(--muted); font-size: 15px; }
.feature-row .kv { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-size: 13px; padding: 5px 12px; border-radius: 999px; background: var(--bg); border: 1px solid var(--line); color: var(--muted); }

/* ---------- 时间线 ---------- */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--brand), var(--brand-line)); }
.timeline .tl { position: relative; padding: 0 0 30px 8px; }
.timeline .tl::before {
  content: ""; position: absolute; left: -30px; top: 8px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 3px solid var(--brand);
}
.timeline .tl time { font-size: 13px; font-weight: 800; color: var(--accent); letter-spacing: .06em; }
.timeline .tl h4 { font-size: 17px; margin: 4px 0 6px; }
.timeline .tl p { font-size: 14.5px; color: var(--muted); margin: 0; }

/* ---------- 画廊 ---------- */
.gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.gallery figure { margin: 0; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-sm); }
.gallery img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.gallery figcaption { padding: 14px 18px; font-size: 14px; color: var(--muted); display: flex; justify-content: space-between; gap: 10px; }
.gallery figcaption b { color: var(--ink); font-weight: 700; }

/* ---------- 视频 ---------- */
.video-box { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #06152b; box-shadow: var(--shadow); }
.video-box video { width: 100%; display: block; background: #06152b; }
.video-note { font-size: 13px; color: var(--muted); margin-top: 12px; text-align: center; }
.video-fallback { padding: 56px 24px; text-align: center; color: #a9c0e0; }
.video-fallback strong { display: block; color: #fff; font-size: 18px; margin-bottom: 8px; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
table.spec { width: 100%; border-collapse: collapse; min-width: 620px; font-size: 15px; }
table.spec th, table.spec td { padding: 15px 20px; text-align: left; border-bottom: 1px solid var(--line); }
table.spec th { background: var(--bg); font-weight: 700; color: var(--ink); white-space: nowrap; }
table.spec tbody tr:last-child td { border-bottom: 0; }
table.spec tbody tr:hover { background: #fbfdff; }

/* ---------- 页头（内页） ---------- */
.page-hero {
  position: relative; padding: calc(var(--header-h) + 70px) 0 64px;
  background: linear-gradient(120deg, var(--brand-deep) 0%, #123b73 55%, var(--brand) 100%);
  color: #cfe0f8; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 138, 31, .38), transparent 68%);
}
.page-hero .wrap { position: relative; z-index: 2; }
.page-hero h1 { color: #fff; font-size: clamp(28px, 3.8vw, 44px); margin-bottom: 14px; letter-spacing: -.01em; }
.page-hero p { max-width: 720px; font-size: 17px; color: #b6cdea; margin: 0; }
.crumb { font-size: 13px; color: #8fb4e3; margin-bottom: 16px; letter-spacing: .04em; }
.crumb a { color: #8fb4e3; }
.crumb a:hover { color: #fff; }

/* ---------- CTA 区 ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--brand) 0%, #0d4bab 52%, #08203f 100%);
  color: #fff; border-radius: 22px; padding: 52px 48px;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 28px;
  box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.cta-band::after {
  content: ""; position: absolute; right: -80px; bottom: -140px; width: 380px; height: 380px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 138, 31, .45), transparent 70%);
}
.cta-band h2 { color: #fff; font-size: clamp(22px, 2.6vw, 32px); margin-bottom: 10px; position: relative; z-index: 2; }
.cta-band p { color: #d5e4f8; margin: 0; position: relative; z-index: 2; }
.cta-band .actions { position: relative; z-index: 2; display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 34px; align-items: start; }
.info-list { display: grid; gap: 14px; }
.info-item { display: flex; gap: 16px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 18px 20px; box-shadow: var(--shadow-sm); }
.info-item .ic {
  width: 42px; height: 42px; flex: 0 0 42px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  background: var(--brand-soft); color: var(--brand); font-size: 19px;
}
.info-item .t { font-size: 13px; color: var(--muted); }
.info-item .v { font-size: 16px; font-weight: 600; color: var(--ink); word-break: break-all; }

form.form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
form.form .row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 7px; }
.field label i { color: #e5484d; font-style: normal; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 15px; border: 1px solid var(--line); border-radius: 10px;
  background: #fbfdff; transition: border-color .2s, box-shadow .2s, background .2s;
}
.field textarea { min-height: 132px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--brand); background: #fff; box-shadow: 0 0 0 4px rgba(22, 103, 214, .12);
}
.field .hint { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.field .err { display: none; font-size: 12.5px; color: #e5484d; margin-top: 6px; }
.field.invalid input, .field.invalid textarea { border-color: #e5484d; background: #fff7f7; }
.field.invalid .err { display: block; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 6px; }
.form-foot .note { font-size: 13px; color: var(--muted); }
.form-msg { display: none; margin-top: 18px; padding: 14px 18px; border-radius: 10px; font-size: 14.5px; }
.form-msg.ok { display: block; background: #ecfdf3; border: 1px solid #b7ebc9; color: #17703c; }
.form-msg.bad { display: block; background: #fef3f2; border: 1px solid #fbc9c6; color: #b42318; }
.map-box { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow-sm); background: #fff; padding: 26px; }
.map-box .ph { display: grid; place-items: center; height: 200px; border-radius: 12px; background: repeating-linear-gradient(45deg, #f2f7fd, #f2f7fd 12px, #eaf2fc 12px, #eaf2fc 24px); color: var(--muted); font-size: 14px; }

/* ---------- 常见问题 ---------- */
.faq { display: grid; gap: 12px; }
.faq details {
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff;
  box-shadow: var(--shadow-sm); overflow: hidden; transition: border-color .2s, box-shadow .2s;
}
.faq details[open] { border-color: var(--brand-line); box-shadow: var(--shadow); }
.faq summary {
  cursor: pointer; padding: 18px 22px; font-weight: 600; color: var(--ink);
  font-size: 16px; list-style: none; display: flex; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "＋"; flex: 0 0 auto; width: 24px; height: 24px; border-radius: 50%;
  display: grid; place-items: center; font-size: 14px; font-weight: 700;
  background: var(--brand-soft); color: var(--brand); transition: transform .2s;
}
.faq details[open] summary::before { content: "－"; background: var(--brand); color: #fff; }
.faq summary:hover { color: var(--brand); }
.faq .faq-body { padding: 0 22px 20px 58px; color: var(--muted); font-size: 15px; }

/* ---------- 页脚 ---------- */
.site-footer { background: #061a33; color: #90a8c8; padding: 66px 0 0; font-size: 14.5px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.site-footer a { color: #90a8c8; }
.site-footer a:hover { color: #fff; }
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.footer-brand img { width: 46px; height: 46px; border-radius: 50%; background: #fff; padding: 3px; }
.footer-brand strong { color: #fff; font-size: 17px; display: block; }
.footer-brand span { font-size: 11px; letter-spacing: .08em; color: #7d94b4; }
.footer-list li { margin-bottom: 11px; display: flex; gap: 9px; }
.footer-list .ic { color: var(--accent); }
.footer-slogan { font-size: 13.5px; color: #7d94b4; line-height: 1.8; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08); padding: 20px 0; font-size: 13px; color: #7d94b4;
  display: flex; flex-wrap: wrap; gap: 10px 26px; align-items: center; justify-content: space-between;
}
.footer-bottom .links { display: flex; flex-wrap: wrap; gap: 18px; }

/* ---------- 浮动按钮 ---------- */
.to-top {
  position: fixed; right: 24px; bottom: 26px; z-index: 90; width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line); background: #fff; color: var(--brand); cursor: pointer;
  box-shadow: var(--shadow); display: grid; place-items: center; font-size: 18px;
  opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .25s;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--brand); color: #fff; }

/* ---------- 动画 ---------- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; gap: 46px; }
  .hero-visual .float-card { left: auto; right: 12px; bottom: -20px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 920px) {
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 4px; padding: 16px 20px 24px; background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow); transform: translateY(-120%); transition: transform .3s ease; max-height: calc(100vh - var(--header-h)); overflow: auto;
  }
  .nav-open .nav { transform: none; }
  .nav a { padding: 14px 12px; border-radius: 10px; font-size: 16px; border-bottom: 1px solid var(--line); }
  .nav a.active::after { display: none; }
  .header-cta { display: none; }
  .nav-toggle { display: block; }
  .section { padding: 68px 0; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .arch { grid-template-columns: 1fr; }
  .arch .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tab-panel .split { grid-template-columns: 1fr; gap: 28px; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-row { grid-template-columns: 1fr; gap: 12px; }
  .gallery { grid-template-columns: 1fr; }
  .cta-band { padding: 38px 26px; }
  .hero-metrics { max-width: none; }
}

@media (max-width: 620px) {
  html { font-size: 15px; }
  .wrap { padding: 0 18px; }
  .hero { padding-top: calc(var(--header-h) + 60px); }
  .hero-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
  .hero-metrics .num { font-size: 22px; }
  .brand-text strong { font-size: 15px; }
  .brand-text span { display: none; }
  .grid-4, .footer-grid { grid-template-columns: 1fr; }
  form.form { padding: 22px; }
  form.form .row { grid-template-columns: 1fr; }
  .cta-band .actions .btn { width: 100%; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-card .thumb { aspect-ratio: 16 / 11; }
}

/* ---------- 移动端 / 触屏设备强化 ---------- */
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { -webkit-tap-highlight-color: transparent; }
video { max-width: 100%; height: auto; }
body.nav-open { overflow: hidden; }

/* 触屏设备取消 hover 位移，避免"点一下粘住"的效果 */
@media (hover: none) {
  .card:hover, .product-card:hover { transform: none; box-shadow: var(--shadow-sm); }
  .btn-primary:hover, .btn-accent:hover { transform: none; }
  .product-card:hover .thumb img { transform: none; }
  .tab:hover { border-color: var(--line); color: inherit; }
  .nav a:hover { background: transparent; }
}

@media (max-width: 920px) {
  :root { --header-h: 68px; }
  .nav { padding-bottom: calc(24px + env(safe-area-inset-bottom, 0px)); }
}

@media (max-width: 620px) {
  :root { --header-h: 64px; --radius: 14px; }

  .section { padding: 52px 0; }
  .section--tight { padding: 40px 0; }
  .section-head { margin-bottom: 34px; }
  .section-head p { font-size: 15.5px; }

  .hero { padding: calc(var(--header-h) + 48px) 0 56px; }
  .hero-lead { font-size: 16px; margin-bottom: 24px; }
  .hero-badge { font-size: 12px; padding: 6px 12px 6px 6px; }
  .hero-actions { gap: 10px; margin-bottom: 30px; }
  .hero-actions .btn { flex: 1 1 100%; }
  .hero-visual .float-card { position: static; margin-top: 14px; min-width: 0; }

  .card { padding: 24px 20px; }
  .card .icon { width: 46px; height: 46px; font-size: 21px; margin-bottom: 14px; }
  .product-card .body { padding: 20px 18px 22px; }

  .tabs {
    flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none;
    -webkit-overflow-scrolling: touch; padding-bottom: 4px; margin-bottom: 26px;
  }
  .tabs::-webkit-scrollbar { display: none; }
  .tab { flex: 0 0 auto; }

  .gallery figcaption { flex-direction: column; gap: 2px; }
  .table-wrap { -webkit-overflow-scrolling: touch; }
  table.spec { min-width: 520px; font-size: 14px; }
  table.spec th, table.spec td { padding: 12px 14px; }
  .stats .item { padding: 24px 14px; }
  .footer-list a { word-break: break-all; }
  .cta-band { padding: 32px 22px; border-radius: 18px; }
  .info-item { padding: 16px; }
  .info-item .ic { width: 38px; height: 38px; flex: 0 0 38px; font-size: 17px; }
  form.form .field { margin-bottom: 16px; }
  .to-top { right: 16px; bottom: 18px; }
}

@media (max-width: 380px) {
  .wrap { padding: 0 14px; }
  .hero-metrics { gap: 8px; }
  .hero-metrics .num { font-size: 20px; }
  .stats { grid-template-columns: 1fr; }
}

@media print {
  .site-header, .to-top, .cta-band, .site-footer { display: none; }
  body { color: #000; }
}