/* ==========================================================================
   深圳企客飞信息科技有限公司 · 官网样式
   设计风格：深色科技风（参考前海粤十）
   作者：WorkBuddy
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 底色层级 */
  --bg: #050b18;
  --bg-soft: #08111f;
  --bg-card: rgba(255, 255, 255, 0.035);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);

  /* 主色 */
  --primary: #2f7cff;
  --primary-light: #5b9dff;
  --cyan: #22d3ee;
  --gold: #f0b34a;

  /* 文字 */
  --text: #e9f0fb;
  --text-sub: #a8bcd8;
  --text-muted: #6d829f;

  /* 渐变 */
  --grad-primary: linear-gradient(135deg, #2f7cff 0%, #22d3ee 100%);
  --grad-gold: linear-gradient(135deg, #f0b34a 0%, #ff8a3d 100%);
  --grad-title: linear-gradient(120deg, #ffffff 10%, #9dc4ff 55%, #22d3ee 100%);

  /* 阴影 / 圆角 */
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 12px 40px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 40px rgba(47, 124, 255, 0.25);
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;

  /* 布局 */
  --max: 1240px;
  --nav-h: 72px;
}

/* ---------- 2. 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 15px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: all 0.25s ease; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button, input, textarea, select { font-family: inherit; font-size: inherit; outline: none; }
::selection { background: rgba(47, 124, 255, 0.4); }

/* 滚动条 */
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: #050b18; }
::-webkit-scrollbar-thumb { background: #1e3355; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #2f7cff; }

/* ---------- 3. 通用版式 ---------- */
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

.section { padding: 96px 0; position: relative; }
.section--tight { padding: 64px 0; }
.section--soft { background: var(--bg-soft); }

/* 区块标题 */
.sec-head { text-align: center; margin-bottom: 56px; }
.sec-head--left { text-align: left; }

.sec-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; letter-spacing: 2px; color: var(--cyan);
  padding: 6px 16px; border-radius: 999px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.22);
  margin-bottom: 20px; font-weight: 500;
}
.sec-tag::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 10px var(--cyan);
}

.sec-title {
  font-size: 40px; font-weight: 700; line-height: 1.3; letter-spacing: -0.5px;
  background: var(--grad-title); -webkit-background-clip: text;
  background-clip: text; -webkit-text-fill-color: transparent;
}
.sec-desc {
  margin-top: 16px; color: var(--text-sub); font-size: 16px;
  max-width: 720px; margin-left: auto; margin-right: auto;
}
.sec-head--left .sec-desc { margin-left: 0; }

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px; border-radius: 999px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
  transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-primary {
  background: var(--grad-primary); color: #fff;
  box-shadow: 0 6px 24px rgba(47, 124, 255, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(47, 124, 255, 0.5); }

.btn-ghost {
  background: transparent; color: var(--text);
  border-color: var(--line-strong);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(34, 211, 238, 0.06); }

.btn-gold { background: var(--grad-gold); color: #2a1a00; font-weight: 700; }
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(240, 179, 74, 0.4); }

.btn-sm { padding: 9px 20px; font-size: 14px; }

/* 文字箭头链接 */
.link-arrow {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--cyan); font-size: 14px; font-weight: 500;
}
.link-arrow::after { content: "→"; transition: transform 0.25s ease; }
.link-arrow:hover::after { transform: translateX(5px); }

/* ---------- 5. 顶部导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 999;
  height: var(--nav-h); display: flex; align-items: center;
  background: rgba(5, 11, 24, 0.72);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: all 0.32s ease;
}
.nav.is-scrolled {
  background: rgba(5, 11, 24, 0.95);
  border-bottom-color: var(--line);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}
.nav__inner {
  width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}

/* Logo */
.logo { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.logo__mark {
  width: 38px; height: 38px; border-radius: 10px; flex-shrink: 0;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 19px; color: #fff;
  box-shadow: 0 4px 18px rgba(47, 124, 255, 0.45);
}
.logo__text { line-height: 1.15; }
.logo__name { font-size: 18px; font-weight: 700; letter-spacing: 1px; }
.logo__sub { font-size: 10px; color: var(--text-muted); letter-spacing: 1.6px; text-transform: uppercase; }

/* 菜单 */
.nav__menu { display: flex; align-items: center; gap: 4px; }
.nav__menu a {
  position: relative; padding: 9px 16px; font-size: 15px;
  color: var(--text-sub); border-radius: 8px;
}
.nav__menu a:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.nav__menu a.is-active { color: #fff; font-weight: 600; }
.nav__menu a.is-active::after {
  content: ""; position: absolute; bottom: 3px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 2px; border-radius: 2px; background: var(--grad-primary);
}

.nav__cta { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.nav__phone { font-size: 14px; color: var(--text-sub); }
.nav__phone:hover { color: var(--cyan); }

/* 汉堡 */
.nav__toggle {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line);
  border-radius: 10px; background: transparent; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav__toggle span {
  display: block; width: 19px; height: 2px; background: var(--text);
  border-radius: 2px; transition: all 0.3s ease;
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉 */
.nav__drawer {
  position: fixed; top: var(--nav-h); left: 0; right: 0; z-index: 998;
  background: rgba(6, 13, 28, 0.99);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  padding: 12px 24px 28px;
  transform: translateY(-12px); opacity: 0; pointer-events: none;
  transition: all 0.3s ease; max-height: calc(100vh - var(--nav-h)); overflow-y: auto;
}
.nav__drawer.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
.nav__drawer a {
  display: block; padding: 14px 4px; font-size: 16px;
  color: var(--text-sub); border-bottom: 1px solid var(--line);
}
.nav__drawer a.is-active { color: var(--cyan); font-weight: 600; }
.nav__drawer .btn { width: 100%; margin-top: 18px; }

/* ---------- 6. Hero ---------- */
.hero {
  position: relative; padding: calc(var(--nav-h) + 88px) 0 96px;
  overflow: hidden;
}
/* 网格背景 */
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(47, 124, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 124, 255, 0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 65% at 50% 25%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 65% at 50% 25%, #000 30%, transparent 78%);
}
/* 光斑 */
.hero::after {
  content: ""; position: absolute; z-index: 0;
  width: 900px; height: 620px; top: -240px; left: 50%; transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(47, 124, 255, 0.24) 0%, rgba(34, 211, 238, 0.1) 38%, transparent 68%);
  filter: blur(30px); pointer-events: none;
}
.hero .wrap { position: relative; z-index: 2; }
.hero__inner { text-align: center; max-width: 900px; margin: 0 auto; }

.hero__badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 8px 20px; border-radius: 999px; font-size: 13.5px;
  color: var(--text-sub); margin-bottom: 28px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line-strong);
}
.hero__badge b { color: var(--cyan); font-weight: 600; }
.hero__badge .dot {
  width: 7px; height: 7px; border-radius: 50%; background: #3ddc84;
  box-shadow: 0 0 10px #3ddc84; animation: pulse 2s infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.hero__title {
  font-size: 58px; font-weight: 800; line-height: 1.18; letter-spacing: -1.5px;
  background: var(--grad-title); -webkit-background-clip: text;
  background-clip: text; -webkit-text-fill-color: transparent;
}
.hero__title em { font-style: normal; display: block; }
.hero__sub {
  margin-top: 24px; font-size: 17px; color: var(--text-sub);
  line-height: 1.9; max-width: 780px; margin-left: auto; margin-right: auto;
}
.hero__actions {
  margin-top: 40px; display: flex; gap: 16px;
  justify-content: center; flex-wrap: wrap;
}

/* Hero 数据条 */
.hero__stats {
  margin-top: 72px; display: grid;
  grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden;
}
.stat {
  background: rgba(9, 18, 35, 0.9); padding: 30px 20px; text-align: center;
  transition: background 0.3s ease;
}
.stat:hover { background: rgba(47, 124, 255, 0.1); }
.stat__num {
  font-size: 40px; font-weight: 800; line-height: 1.1;
  background: var(--grad-primary); -webkit-background-clip: text;
  background-clip: text; -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
}
.stat__num small { font-size: 20px; font-weight: 700; }
.stat__label { margin-top: 8px; font-size: 14px; color: var(--text-muted); }

/* 首页 Hero 附加：业务标签流 */
.hero__tags {
  margin-top: 36px; display: flex; flex-wrap: wrap;
  gap: 10px; justify-content: center;
}
.hero__tags span {
  padding: 7px 17px; border-radius: 999px; font-size: 13.5px;
  color: var(--text-sub); background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
}

/* ---------- 7. 卡片 / 网格 ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative; padding: 34px 30px;
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--r-md); overflow: hidden;
  transition: all 0.34s cubic-bezier(0.4, 0, 0.2, 1);
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--grad-primary); opacity: 0; transition: opacity 0.34s ease;
}
.card:hover {
  transform: translateY(-6px); background: var(--bg-card-hover);
  border-color: rgba(47, 124, 255, 0.4); box-shadow: var(--shadow-md);
}
.card:hover::before { opacity: 1; }

.card__icon {
  width: 54px; height: 54px; border-radius: 13px; margin-bottom: 20px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(47, 124, 255, 0.12);
  border: 1px solid rgba(47, 124, 255, 0.25);
  color: var(--primary-light);
}
.card__icon svg { width: 26px; height: 26px; }
.card__icon--cyan { background: rgba(34, 211, 238, 0.12); border-color: rgba(34, 211, 238, 0.25); color: var(--cyan); }
.card__icon--gold { background: rgba(240, 179, 74, 0.12); border-color: rgba(240, 179, 74, 0.28); color: var(--gold); }

.card__title { font-size: 20px; font-weight: 600; margin-bottom: 12px; }
.card__text { font-size: 14.5px; color: var(--text-sub); line-height: 1.8; }

/* 卡片内小列表 */
.card__list { margin-top: 18px; }
.card__list li {
  position: relative; padding-left: 18px; font-size: 14px;
  color: var(--text-sub); line-height: 2.1;
}
.card__list li::before {
  content: ""; position: absolute; left: 0; top: 13px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--cyan);
}

/* 序号（痛点卡） */
.card__no {
  position: absolute; top: 22px; right: 26px;
  font-size: 40px; font-weight: 800; line-height: 1;
  color: rgba(255, 255, 255, 0.05); font-variant-numeric: tabular-nums;
}

/* ---------- 8. 特性行（图 + 文） ---------- */
.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.feature--rev .feature__media { order: 2; }
.feature__title { font-size: 32px; font-weight: 700; line-height: 1.35; margin-bottom: 18px; }
.feature__text { color: var(--text-sub); font-size: 15.5px; line-height: 1.9; margin-bottom: 24px; }
.feature__list { display: grid; gap: 14px; }
.feature__list li {
  display: flex; gap: 12px; align-items: flex-start;
  font-size: 15px; color: var(--text-sub);
}
.feature__list .tick {
  width: 21px; height: 21px; border-radius: 50%; flex-shrink: 0; margin-top: 3px;
  background: rgba(34, 211, 238, 0.14); color: var(--cyan);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
}

/* 视觉面板（替代图片） */
.panel {
  position: relative; border-radius: var(--r-lg); padding: 28px;
  background: linear-gradient(150deg, rgba(47, 124, 255, 0.13), rgba(34, 211, 238, 0.05));
  border: 1px solid var(--line-strong);
  min-height: 320px; display: flex; flex-direction: column; justify-content: center;
  gap: 14px; overflow: hidden;
}
.panel::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
}
.panel > * { position: relative; z-index: 1; }
.panel__row {
  display: flex; align-items: center; gap: 13px;
  padding: 15px 18px; border-radius: var(--r-sm);
  background: rgba(5, 11, 24, 0.6); border: 1px solid var(--line);
  font-size: 14.5px;
}
.panel__row i {
  width: 8px; height: 8px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan); flex-shrink: 0;
}
.panel__row b { color: var(--text); font-weight: 600; }
.panel__row span { color: var(--text-muted); margin-left: auto; font-size: 13px; }

/* 进度条（视觉装饰） */
.bar { height: 6px; border-radius: 3px; background: rgba(255, 255, 255, 0.08); overflow: hidden; }
.bar > i { display: block; height: 100%; border-radius: 3px; background: var(--grad-primary); }

/* ---------- 9. 流程步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  position: relative; padding: 30px 26px;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--r-md);
}
.step__no {
  width: 42px; height: 42px; border-radius: 12px; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; font-weight: 800; color: #fff;
  background: var(--grad-primary); box-shadow: 0 5px 18px rgba(47, 124, 255, 0.35);
}
.step__title { font-size: 17px; font-weight: 600; margin-bottom: 9px; }
.step__text { font-size: 14px; color: var(--text-sub); line-height: 1.8; }

/* ---------- 10. 标签页（产品页） ---------- */
.tabs { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.tab {
  padding: 11px 26px; border-radius: 999px; font-size: 15px; cursor: pointer;
  background: var(--bg-card); border: 1px solid var(--line);
  color: var(--text-sub); transition: all 0.28s ease;
}
.tab:hover { color: var(--text); border-color: var(--line-strong); }
.tab.is-active {
  background: var(--grad-primary); color: #fff; font-weight: 600;
  border-color: transparent; box-shadow: 0 6px 20px rgba(47, 124, 255, 0.35);
}
.tab-pane { display: none; }
.tab-pane.is-active { display: block; animation: fadeUp 0.45s ease; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- 11. 案例 ---------- */
.case {
  position: relative; padding: 32px 30px; border-radius: var(--r-md);
  background: var(--bg-card); border: 1px solid var(--line);
  transition: all 0.34s ease; overflow: hidden;
}
.case:hover { border-color: rgba(34, 211, 238, 0.4); transform: translateY(-5px); box-shadow: var(--shadow-md); }
.case__top { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 16px; }
.case__industry {
  font-size: 12.5px; padding: 5px 13px; border-radius: 999px;
  color: var(--cyan); background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.22);
}
.case__name { font-size: 18px; font-weight: 600; }
.case__desc { font-size: 14.5px; color: var(--text-sub); line-height: 1.85; }
.case__result {
  margin-top: 20px; padding-top: 18px; border-top: 1px dashed var(--line);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
}
.case__result div { text-align: center; }
.case__result b {
  display: block; font-size: 21px; font-weight: 800;
  background: var(--grad-primary); -webkit-background-clip: text;
  background-clip: text; -webkit-text-fill-color: transparent;
}
.case__result span { font-size: 12.5px; color: var(--text-muted); }

/* ---------- 12. 生态伙伴 ---------- */
.partners { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; }
.partner {
  height: 74px; border-radius: var(--r-sm); display: flex;
  align-items: center; justify-content: center;
  background: var(--bg-card); border: 1px solid var(--line);
  color: var(--text-sub); font-size: 15px; font-weight: 500;
  transition: all 0.3s ease;
}
.partner:hover { color: #fff; border-color: rgba(47, 124, 255, 0.45); background: rgba(47, 124, 255, 0.09); }

/* ---------- 13. CTA 区块 ---------- */
.cta {
  position: relative; overflow: hidden; text-align: center;
  padding: 76px 40px; border-radius: var(--r-lg);
  background: linear-gradient(135deg, rgba(47, 124, 255, 0.18) 0%, rgba(34, 211, 238, 0.07) 100%);
  border: 1px solid rgba(47, 124, 255, 0.3);
}
.cta::after {
  content: ""; position: absolute; width: 600px; height: 400px;
  top: -160px; right: -120px; border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.2), transparent 68%);
  filter: blur(24px);
}
.cta > * { position: relative; z-index: 1; }
.cta h2 { font-size: 34px; font-weight: 700; line-height: 1.35; margin-bottom: 14px; }
.cta p { color: var(--text-sub); font-size: 16px; margin-bottom: 32px; }
.cta__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 14. 内页头部 ---------- */
.page-head {
  position: relative; padding: calc(var(--nav-h) + 70px) 0 62px;
  text-align: center; overflow: hidden;
}
.page-head::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(47, 124, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 124, 255, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 90% at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 90% at 50% 0%, #000 20%, transparent 75%);
}
.page-head .wrap { position: relative; z-index: 2; }
.page-head h1 {
  font-size: 46px; font-weight: 800; line-height: 1.25; letter-spacing: -0.8px;
  background: var(--grad-title); -webkit-background-clip: text;
  background-clip: text; -webkit-text-fill-color: transparent;
}
.page-head p { margin-top: 18px; color: var(--text-sub); font-size: 16.5px; max-width: 740px; margin-left: auto; margin-right: auto; }

/* 面包屑 */
.crumb { font-size: 13.5px; color: var(--text-muted); margin-bottom: 20px; }
.crumb a:hover { color: var(--cyan); }
.crumb span { margin: 0 8px; opacity: 0.5; }

/* ---------- 15. 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }

.info-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.info-table tr { border-bottom: 1px solid var(--line); }
.info-table tr:last-child { border-bottom: 0; }
.info-table th {
  text-align: left; padding: 15px 18px 15px 0; width: 148px;
  color: var(--text-muted); font-weight: 400; vertical-align: top;
}
.info-table td { padding: 15px 0; color: var(--text); }

/* 时间轴 */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px;
  width: 1px; background: linear-gradient(180deg, var(--primary), var(--cyan), transparent);
}
.timeline li { position: relative; padding-bottom: 30px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -30px; top: 8px;
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--primary);
  box-shadow: 0 0 12px rgba(47, 124, 255, 0.6);
}
.timeline time { font-size: 13.5px; color: var(--cyan); font-weight: 600; letter-spacing: 0.5px; }
.timeline h4 { font-size: 16.5px; font-weight: 600; margin: 6px 0 7px; }
.timeline p { font-size: 14px; color: var(--text-sub); line-height: 1.8; }

/* 资质证书 */
.certs { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 16px; }
.cert {
  padding: 26px 22px; border-radius: var(--r-md); text-align: center;
  background: var(--bg-card); border: 1px solid var(--line);
  transition: all 0.3s ease;
}
.cert:hover { border-color: rgba(240, 179, 74, 0.4); background: rgba(240, 179, 74, 0.05); }
.cert__ico { font-size: 30px; margin-bottom: 12px; }
.cert__name { font-size: 15.5px; font-weight: 600; margin-bottom: 6px; }
.cert__desc { font-size: 13px; color: var(--text-muted); }

/* ---------- 16. 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; }
.contact-item { display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.contact-item:last-child { border-bottom: 0; }
.contact-item__ico {
  width: 46px; height: 46px; border-radius: 12px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(47, 124, 255, 0.11); border: 1px solid rgba(47, 124, 255, 0.24);
  color: var(--primary-light);
}
.contact-item__ico svg { width: 21px; height: 21px; }
.contact-item h4 { font-size: 14px; color: var(--text-muted); font-weight: 400; margin-bottom: 5px; }
.contact-item p { font-size: 15.5px; color: var(--text); line-height: 1.7; }

/* 表单 */
.form {
  padding: 38px 34px; border-radius: var(--r-lg);
  background: var(--bg-card); border: 1px solid var(--line-strong);
}
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--text-sub); margin-bottom: 8px; }
.field label i { color: #ff6b6b; font-style: normal; }
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 16px; border-radius: var(--r-sm);
  background: rgba(5, 11, 24, 0.7); border: 1px solid var(--line);
  color: var(--text); font-size: 14.5px; transition: all 0.25s ease;
}
.field textarea { resize: vertical; min-height: 118px; line-height: 1.7; }
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--primary); background: rgba(5, 11, 24, 0.95);
  box-shadow: 0 0 0 3px rgba(47, 124, 255, 0.15);
}
.field input::placeholder, .field textarea::placeholder { color: #4b5d78; }
.field select option { background: #0b1729; }
.field .err { display: none; font-size: 12.5px; color: #ff6b6b; margin-top: 6px; }
.field.has-err input, .field.has-err textarea, .field.has-err select { border-color: #ff6b6b; }
.field.has-err .err { display: block; }
.form__submit { width: 100%; margin-top: 6px; }
.form__tip { margin-top: 14px; font-size: 12.5px; color: var(--text-muted); text-align: center; }

/* 表单提交成功提示 */
.form__ok {
  display: none; text-align: center; padding: 44px 20px;
}
.form__ok.is-show { display: block; animation: fadeUp 0.45s ease; }
.form__ok .ico {
  width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 20px;
  background: rgba(61, 220, 132, 0.13); border: 1px solid rgba(61, 220, 132, 0.35);
  color: #3ddc84; display: flex; align-items: center; justify-content: center;
  font-size: 30px;
}
.form__ok h3 { font-size: 21px; margin-bottom: 10px; }
.form__ok p { color: var(--text-sub); font-size: 14.5px; }

/* 地图占位 */
.map-box {
  height: 300px; border-radius: var(--r-lg); margin-top: 24px;
  border: 1px solid var(--line); position: relative; overflow: hidden;
  background: linear-gradient(140deg, rgba(47, 124, 255, 0.1), rgba(34, 211, 238, 0.04));
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
}
.map-box::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(47, 124, 255, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 124, 255, 0.09) 1px, transparent 1px);
  background-size: 36px 36px;
}
.map-box > * { position: relative; z-index: 1; }
.map-box .pin { font-size: 34px; }
.map-box h4 { font-size: 17px; font-weight: 600; }
.map-box p { font-size: 14px; color: var(--text-sub); }

/* ---------- 17. FAQ ---------- */
.faq { max-width: 860px; margin: 0 auto; }
.faq__item {
  border: 1px solid var(--line); border-radius: var(--r-md);
  background: var(--bg-card); margin-bottom: 14px; overflow: hidden;
}
.faq__q {
  padding: 22px 26px; font-size: 16.5px; font-weight: 600; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  transition: color 0.25s ease;
}
.faq__q:hover { color: var(--cyan); }
.faq__q i {
  width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(47, 124, 255, 0.14); color: var(--primary-light);
  font-style: normal; font-size: 17px; transition: all 0.3s ease;
}
.faq__item.is-open .faq__q i { transform: rotate(45deg); background: var(--grad-primary); color: #fff; }
.faq__a {
  max-height: 0; overflow: hidden; transition: max-height 0.36s ease;
}
.faq__a p { padding: 0 26px 24px; font-size: 14.5px; color: var(--text-sub); line-height: 1.9; }
.faq__item.is-open .faq__a { max-height: 500px; }

/* ---------- 18. 页脚 ---------- */
.footer {
  background: #03080f; border-top: 1px solid var(--line);
  padding: 66px 0 0; margin-top: 0;
}
.footer__top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 44px; }
.footer__brand .logo { margin-bottom: 18px; }
.footer__brand p { font-size: 14px; color: var(--text-muted); line-height: 1.9; max-width: 330px; }
.footer h4 { font-size: 15.5px; font-weight: 600; margin-bottom: 20px; color: var(--text); }
.footer__links li { margin-bottom: 12px; }
.footer__links a { font-size: 14px; color: var(--text-muted); }
.footer__links a:hover { color: var(--cyan); padding-left: 5px; }
.footer__contact li {
  font-size: 14px; color: var(--text-muted); margin-bottom: 13px;
  display: flex; gap: 10px; line-height: 1.7;
}
.footer__contact b { color: var(--text-sub); font-weight: 400; }
.footer__bottom {
  margin-top: 48px; padding: 24px 0; border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; flex-wrap: wrap; font-size: 13px; color: var(--text-muted);
}
.footer__bottom a:hover { color: var(--cyan); }
.footer__bottom .sep { margin: 0 8px; opacity: 0.4; }

/* ---------- 19. 回到顶部 ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 30px; z-index: 900;
  width: 46px; height: 46px; border-radius: 12px; cursor: pointer;
  background: rgba(47, 124, 255, 0.9); color: #fff; border: 0;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 26px rgba(47, 124, 255, 0.45);
  opacity: 0; pointer-events: none; transform: translateY(14px);
  transition: all 0.32s ease;
}
.to-top.is-show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top:hover { background: var(--primary); }

/* ---------- 20. 滚动入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1); }
.reveal.is-in { opacity: 1; transform: translateY(0); }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }
.reveal[data-delay="5"] { transition-delay: 0.4s; }
.reveal[data-delay="6"] { transition-delay: 0.48s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 21. 响应式 ---------- */
@media (max-width: 1100px) {
  .nav__menu { display: none; }
  .nav__toggle { display: flex; }
  .nav__cta .btn { display: none; }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 38px; }
  .hero__title { font-size: 46px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .section { padding: 72px 0; }
  .sec-title { font-size: 32px; }
  .page-head h1 { font-size: 36px; }
  .hero { padding: calc(var(--nav-h) + 56px) 0 72px; }
  .hero__title { font-size: 38px; letter-spacing: -0.8px; }
  .hero__sub { font-size: 15.5px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .feature { grid-template-columns: 1fr; gap: 36px; }
  .feature--rev .feature__media { order: 0; }
  .contact-grid { grid-template-columns: 1fr; gap: 34px; }
  .about-grid { grid-template-columns: 1fr; }
  .cta h2 { font-size: 26px; }
}

@media (max-width: 620px) {
  .wrap { padding: 0 18px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 22px 14px; }
  .stat__num { font-size: 30px; }
  .stat__num small { font-size: 16px; }
  .hero__title { font-size: 31px; }
  .sec-title { font-size: 26px; }
  .page-head h1 { font-size: 29px; }
  .feature__title { font-size: 25px; }
  .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .card { padding: 28px 22px; }
  .form { padding: 26px 20px; }
  .form__row { grid-template-columns: 1fr; }
  .cta { padding: 52px 22px; }
  .cta h2 { font-size: 23px; }
  .footer__top { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .case__result { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .case__result b { font-size: 17px; }
  .to-top { right: 16px; bottom: 20px; }
  .grid { gap: 16px; }
  .crumb { font-size: 12.5px; }
}