/* ============================================================
   广州联度信息科技有限公司官网  全局样式
   明亮科技蓝主题 · Design tokens · 响应式 · 组件
   ============================================================ */

:root {
  /* 品牌色：明亮科技蓝（科技/可信）+ 活力橙（零售/温度） */
  --ink-950: #0B2A5B;
  --ink-900: #103A7A;
  --ink-800: #15489B;
  --ink-700: #1B57B8;
  --brand-600: #1B6FE8;
  --brand-500: #2E8BFF;
  --brand-400: #5AA4FF;
  --brand-100: #E1EFFF;
  --brand-50: #F1F7FF;

  --accent-600: #F26711;
  --accent-500: #FF8126;
  --accent-100: #FFEBDC;

  --gold: #F5B544;

  --text-1: #12284C;
  --text-2: #44597A;
  --text-3: #7A8DA9;
  --line: #DFE8F5;
  --bg: #FFFFFF;
  --bg-soft: #F4F8FF;
  --bg-deep: linear-gradient(135deg, #1565D8 0%, #2E8BFF 100%);

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 2px 12px rgba(27, 111, 232, .07);
  --shadow: 0 14px 36px rgba(27, 111, 232, .12);
  --shadow-lg: 0 28px 64px rgba(18, 72, 158, .18);

  --container: 1200px;
  --header-h: 76px;

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

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: var(--font);
  color: var(--text-1);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}

/* ---------- 通用排版 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: .22em;
  font-weight: 600;
  color: var(--brand-600);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 2px;
  background: var(--accent-500);
  border-radius: 2px;
}
.section-center .eyebrow { justify-content: center; }
.section-center .eyebrow::after {
  content: "";
  width: 26px; height: 2px;
  background: var(--accent-500);
  border-radius: 2px;
}

.h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 700;
  color: var(--ink-950);
  line-height: 1.25;
  letter-spacing: .01em;
  margin-top: 14px;
}
.section-sub {
  color: var(--text-2);
  margin-top: 14px;
  max-width: 720px;
  font-size: 16px;
}
.section-center { text-align: center; }
.section-center .section-sub { margin-inline: auto; }

.section { padding: 92px 0; }
.section--soft { background: var(--bg-soft); }
.section--deep {
  background: var(--bg-deep);
  color: #EAF3FF;
  position: relative;
  overflow: hidden;
}
.section--deep::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(800px 500px at 80% 0%, #000, transparent 75%);
  pointer-events: none;
}
.section--deep > .container { position: relative; }
.section--deep .h2 { color: #fff; }
.section--deep .section-sub { color: #D7E7FF; }
.section--deep .eyebrow { color: #C7DEFF; }

.head-row { margin-bottom: 52px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1.5px solid transparent;
  transition: transform .22s ease, box-shadow .22s ease, background .22s, color .22s;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
  color: #fff;
  box-shadow: 0 10px 24px rgba(242, 103, 17, .30);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 30px rgba(242, 103, 17, .38); }
.btn-ghost {
  border-color: rgba(27,111,232,.45);
  color: var(--brand-600);
  background: rgba(255,255,255,.65);
}
.btn-ghost:hover { background: var(--brand-50); border-color: var(--brand-500); transform: translateY(-2px); }
.btn-outline {
  border-color: var(--brand-500);
  color: var(--brand-600);
  background: #fff;
}
.btn-outline:hover { background: var(--brand-50); transform: translateY(-2px); }
.btn .arr { transition: transform .2s; }
.btn:hover .arr { transform: translateX(4px); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,.9);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .25s, border-color .25s;
}
.site-header.scrolled {
  border-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.nav {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 6px 16px rgba(27, 111, 232, .18);
  border: 1px solid var(--brand-100);
  overflow: hidden;
}
.brand-mark img { width: 100%; height: 100%; object-fit: contain; }
.brand-text { line-height: 1.25; }
.brand-text b { display: block; font-size: 17px; color: var(--ink-950); letter-spacing: .02em; }
.brand-text small { display: block; font-size: 10.5px; letter-spacing: .18em; color: var(--text-3); }

.nav-menu { display: flex; align-items: center; gap: 6px; }
.nav-menu a {
  position: relative;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-1);
  border-radius: 8px;
  transition: color .2s;
}
.nav-menu a::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 2px;
  width: 0; height: 2.5px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand-500), var(--accent-500));
  transform: translateX(-50%);
  transition: width .22s;
}
.nav-menu a:hover { color: var(--brand-600); }
.nav-menu a.active { color: var(--brand-600); font-weight: 600; }
.nav-menu a.active::after,
.nav-menu a:hover::after { width: 22px; }

.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-phone { font-size: 14px; color: var(--text-2); display: flex; align-items: center; gap: 6px; }
.nav-phone b { color: var(--accent-600); font-size: 16px; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  width: 20px; height: 2px;
  background: var(--ink-900);
  border-radius: 2px;
  transition: transform .25s, opacity .2s;
}
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首页 Hero（明亮科技蓝） ---------- */
.hero {
  position: relative;
  padding-top: calc(var(--header-h) + 84px);
  padding-bottom: 96px;
  background:
    radial-gradient(900px 480px at 88% -10%, rgba(46, 139, 255, .20), transparent 62%),
    radial-gradient(620px 400px at 0% 100%, rgba(46, 139, 255, .12), transparent 60%),
    linear-gradient(180deg, #FFFFFF 0%, #F2F8FF 60%, #EAF3FF 100%);
  color: var(--text-1);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27,111,232,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27,111,232,.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(900px 600px at 70% 18%, #000, transparent 72%);
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 16px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--brand-100);
  box-shadow: var(--shadow-sm);
  font-size: 13.5px;
  color: var(--brand-600);
  font-weight: 500;
}
.hero-badge i { width: 7px; height: 7px; border-radius: 50%; background: #22C38A; box-shadow: 0 0 0 4px rgba(34,195,138,.16); }
.hero h1 {
  margin-top: 22px;
  font-size: clamp(32px, 4.6vw, 54px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--ink-950);
}
.hero h1 em { font-style: normal; color: var(--brand-600); }
.hero p.lead {
  margin-top: 20px;
  font-size: 17px;
  color: var(--text-2);
  max-width: 560px;
}
.hero-actions { margin-top: 36px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 38px;
  justify-content: start;
}
.hero-stats .num { font-size: 32px; font-weight: 800; color: var(--ink-900); }
.hero-stats .num small { font-size: 17px; color: var(--accent-500); font-weight: 700; }
.hero-stats .lab { font-size: 13px; color: var(--text-3); margin-top: 2px; }

.hero-visual { position: relative; }
.hero-visual img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3.2;
  object-fit: cover;
  width: 100%;
  border: 1px solid rgba(27,111,232,.16);
}
.hero-card {
  position: absolute;
  left: -26px; bottom: -24px;
  background: #fff;
  color: var(--text-1);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 14px;
}
.hero-card .ico {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--brand-100);
  display: grid; place-items: center;
  font-size: 22px;
}
.hero-card b { display: block; font-size: 15px; color: var(--ink-950); }
.hero-card small { color: var(--text-3); font-size: 12.5px; }

/* ---------- 信任条 ---------- */
.trustbar { background: #fff; border-bottom: 1px solid var(--line); padding: 26px 0; }
.trustbar .row { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.trustbar .lab { font-size: 13.5px; color: var(--text-3); letter-spacing: .12em; flex-shrink: 0; }
.trustbar .names { display: flex; flex-wrap: wrap; gap: 10px 26px; font-size: 15px; color: var(--text-2); font-weight: 500; }
.trustbar .names span { position: relative; }
.trustbar .names span:not(:last-child)::after {
  content: ""; position: absolute; right: -14px; top: 50%;
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--brand-400);
}

/* ---------- 首页业务三业态 ---------- */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.biz-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s, border-color .3s;
  display: flex; flex-direction: column;
}
.biz-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-color: rgba(27,111,232,.35); }
.biz-card .pic { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg-soft); }
.biz-card .pic img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.biz-card:hover .pic img { transform: scale(1.06); }
.biz-card .pic .tag {
  position: absolute; left: 16px; top: 16px;
  background: rgba(16, 58, 122, .88);
  color: #fff; font-size: 12px; letter-spacing: .14em;
  padding: 5px 12px; border-radius: 999px;
}
.biz-card .body { padding: 26px 26px 28px; flex: 1; display: flex; flex-direction: column; }
.biz-card h3 { font-size: 21px; color: var(--ink-950); }
.biz-card .desc { color: var(--text-2); font-size: 14.5px; margin-top: 10px; flex: 1; }
.biz-card ul { margin-top: 16px; display: grid; gap: 8px; }
.biz-card li { position: relative; padding-left: 22px; font-size: 14px; color: var(--text-2); }
.biz-card li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 8px; height: 8px; border-radius: 2px;
  background: var(--brand-500);
  transform: rotate(45deg);
}
.biz-card .more { margin-top: 20px; font-weight: 600; font-size: 14px; color: var(--brand-600); }

/* ---------- 首页 关于联度 ---------- */
.about-split { display: grid; grid-template-columns: .95fr 1.05fr; gap: 64px; align-items: center; }
.about-split .visual img { border-radius: var(--radius-lg); box-shadow: var(--shadow); aspect-ratio: 4/4.3; object-fit: cover; width: 100%; }
.about-split .visual { position: relative; }
.about-split .float-stat {
  position: absolute; right: -20px; top: 34px;
  background: linear-gradient(150deg, var(--brand-500), var(--brand-600));
  color: #fff; border-radius: var(--radius);
  padding: 18px 22px; box-shadow: var(--shadow-lg);
}
.about-split .float-stat b { display: block; font-size: 26px; }
.about-split .float-stat small { font-size: 12.5px; opacity: .92; }
.about-points { margin-top: 28px; display: grid; gap: 18px; }
.about-point { display: flex; gap: 16px; }
.about-point .n {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--brand-100);
  color: var(--brand-600);
  display: grid; place-items: center;
  font-weight: 800; font-size: 17px;
}
.about-point h4 { font-size: 16.5px; color: var(--ink-950); }
.about-point p { font-size: 14.5px; color: var(--text-2); margin-top: 3px; }

/* ---------- 技术优势（科技蓝底） ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.adv-card {
  padding: 30px 26px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.22);
  backdrop-filter: blur(4px);
  transition: transform .28s, background .28s, border-color .28s;
}
.adv-card:hover { transform: translateY(-6px); background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.4); }
.adv-card .ico {
  width: 52px; height: 52px; border-radius: 14px;
  background: #fff;
  display: grid; place-items: center; font-size: 25px;
  box-shadow: 0 8px 20px rgba(8, 60, 140, .25);
}
.adv-card h3 { font-size: 18px; margin-top: 18px; color: #fff; }
.adv-card p { font-size: 14px; color: #D7E7FF; margin-top: 8px; }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; align-items: stretch; }
.case-grid > * { align-self: stretch; }
.case-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  height: 100%;
  box-sizing: border-box;
  transition: transform .3s, box-shadow .3s;
  position: relative;
  overflow: hidden;
}
.case-card::before {
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 4px;
  background: linear-gradient(90deg, var(--brand-500), var(--accent-500));
  transform: scaleX(0); transform-origin: left;
  transition: transform .35s;
  z-index: 2;
}
.case-card:hover { transform: translateY(-7px); box-shadow: var(--shadow); }
.case-card:hover::before { transform: scaleX(1); }
.case-card.has-photo { padding: 0; }
.case-photo { aspect-ratio: 16 / 9.5; overflow: hidden; background: var(--bg-soft); }
.case-photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-card:hover .case-photo img { transform: scale(1.05); }
.case-card .case-body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.case-head { display: flex; align-items: center; gap: 16px; }
.case-logo {
  width: 64px; height: 64px;
  border-radius: 50%;
  object-fit: contain;
  border: 1px solid var(--line);
  background: #fff;
  padding: 5px;
  flex-shrink: 0;
}
.case-head .meta h3 { font-size: 18px; color: var(--ink-950); line-height: 1.35; }
.case-head .meta small { display: block; color: var(--text-3); font-size: 12.5px; margin-top: 3px; }
.case-card .summary { color: var(--text-2); font-size: 14px; margin-top: 16px; flex: 1; }
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.case-tags span {
  font-size: 12.5px;
  color: var(--brand-600);
  background: var(--brand-50);
  border: 1px solid #CFE2FB;
  padding: 3px 11px;
  border-radius: 999px;
}
.case-foot { margin-top: 20px; padding-top: 16px; border-top: 1px dashed var(--line); font-size: 13px; color: var(--text-3); }

/* ---------- 数据带 ---------- */
.metric-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.metric { text-align: center; padding: 10px; }
.metric .num { font-size: clamp(30px, 3.4vw, 42px); font-weight: 800; color: var(--brand-600); }
.metric .num small { font-size: 18px; }
.metric .lab { color: var(--text-2); font-size: 14.5px; margin-top: 4px; }

/* ---------- 服务承诺 ---------- */
.promise-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.promise {
  display: flex; gap: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform .28s, box-shadow .28s;
}
.promise:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.promise .ico { flex-shrink: 0; width: 48px; height: 48px; border-radius: 12px; background: var(--brand-100); display: grid; place-items: center; font-size: 23px; }
.promise h4 { font-size: 16px; color: var(--ink-950); }
.promise p { font-size: 13.5px; color: var(--text-2); margin-top: 4px; }

/* ---------- CTA ---------- */
.cta-band {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 58px 60px;
  background:
    radial-gradient(600px 300px at 92% -30%, rgba(255,255,255,.22), transparent 60%),
    radial-gradient(500px 280px at -8% 120%, rgba(255,129,38,.28), transparent 60%),
    linear-gradient(125deg, #1565D8 0%, #2E8BFF 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  overflow: hidden;
}
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); }
.cta-band p { color: #DCEBFF; margin-top: 10px; }

/* ---------- 页脚（科技蓝） ---------- */
.site-footer {
  background: linear-gradient(170deg, #0D3B80 0%, #1559C0 100%);
  color: #C9DDF8;
  padding: 70px 0 0;
  font-size: 14px;
}
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 44px; padding-bottom: 50px; }
.footer-grid h4 { color: #fff; font-size: 15px; margin-bottom: 18px; letter-spacing: .06em; }
.footer-grid li { margin-bottom: 11px; }
.footer-grid a:hover { color: #fff; }
.footer-about p { margin-top: 16px; line-height: 1.8; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer-contact .ico { flex-shrink: 0; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.14);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #9EC2EE;
}
.footer-bottom a { color: #9EC2EE; text-decoration: none; transition: color .2s; }
.footer-bottom a:hover { color: #fff; text-decoration: underline; }

/* ---------- 内页横幅（明亮） ---------- */
.page-hero {
  padding-top: calc(var(--header-h) + 64px);
  padding-bottom: 58px;
  background:
    radial-gradient(820px 360px at 88% -40%, rgba(46,139,255,.22), transparent 62%),
    linear-gradient(180deg, #FFFFFF 0%, #EDF5FF 100%);
  color: var(--text-1);
  border-bottom: 1px solid var(--line);
}
.page-hero h1 { font-size: clamp(28px, 3.6vw, 42px); font-weight: 800; margin-top: 12px; color: var(--ink-950); }
.page-hero p { color: var(--text-2); margin-top: 12px; max-width: 640px; }
.crumb { font-size: 13px; color: var(--text-3); margin-top: 18px; }
.crumb a:hover { color: var(--brand-600); }
.crumb span { margin: 0 8px; opacity: .5; }

/* ---------- 关于页 ---------- */
.lead-text { font-size: 17px; color: var(--text-2); }
.lead-text + .lead-text { margin-top: 16px; }
.vision-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.vision-card {
  background: #fff; border-radius: var(--radius-lg);
  padding: 34px 30px; border: 1px solid var(--line);
  position: relative; overflow: hidden;
  transition: transform .28s, box-shadow .28s;
}
.vision-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-sm); }
.vision-card .big { font-size: 44px; font-weight: 800; color: var(--brand-100); line-height: 1; }
.vision-card h3 { font-size: 19px; color: var(--ink-950); margin: 6px 0 10px; }
.vision-card p { font-size: 14px; color: var(--text-2); }
.vision-card.accent {
  background: linear-gradient(150deg, #1B6FE8, #2E8BFF);
  border-color: transparent;
  box-shadow: var(--shadow);
}
.vision-card.accent .big { color: rgba(255,255,255,.35); }
.vision-card.accent h3 { color: #fff; }
.vision-card.accent p { color: #E3EFFF; }

/* 时间轴 */
.timeline { position: relative; margin-top: 10px; }
.timeline::before {
  content: ""; position: absolute; left: 120px; top: 6px; bottom: 6px;
  width: 2px; background: linear-gradient(var(--brand-500), var(--brand-100));
}
.tl-item { position: relative; display: grid; grid-template-columns: 96px 50px 1fr; gap: 0 18px; padding-bottom: 34px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-year { text-align: right; font-weight: 800; font-size: 21px; color: var(--brand-600); padding-top: 2px; }
.tl-dot { position: relative; }
.tl-dot::before {
  content: ""; position: absolute; left: 50%; top: 8px; transform: translateX(-50%);
  width: 13px; height: 13px; border-radius: 50%;
  background: #fff; border: 3px solid var(--brand-500);
  z-index: 1;
}
.tl-body { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; box-shadow: var(--shadow-sm); }
.tl-body h4 { font-size: 16px; color: var(--ink-950); }
.tl-body p { font-size: 14px; color: var(--text-2); margin-top: 4px; }

/* ---------- 产品页 ---------- */
.sol-row { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.sol-row + .sol-row { margin-top: 84px; }
.sol-row.reverse .pic { order: 2; }
.sol-row .pic img { border-radius: var(--radius-lg); box-shadow: var(--shadow); aspect-ratio: 16/10.5; object-fit: cover; width: 100%; background: var(--bg-soft); }
.sol-row .pic img.contain { object-fit: contain; padding: 22px; background: linear-gradient(180deg,#F6FAFF,#EAF2FE); }
.sol-row h3 { font-size: clamp(22px, 2.4vw, 28px); color: var(--ink-950); margin: 12px 0 14px; }
.sol-row .txt > p { color: var(--text-2); }
.feat-list { margin-top: 22px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.feat { display: flex; gap: 12px; align-items: flex-start; }
.feat .ico { flex-shrink: 0; width: 38px; height: 38px; border-radius: 10px; background: var(--brand-50); color: var(--brand-600); display: grid; place-items: center; font-size: 18px; }
.feat b { display: block; font-size: 14.5px; color: var(--ink-950); }
.feat small { font-size: 13px; color: var(--text-3); }

.spec-table { width: 100%; border-collapse: collapse; margin-top: 22px; font-size: 14px; background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.spec-table th, .spec-table td { padding: 13px 18px; border-bottom: 1px solid var(--line); text-align: left; }
.spec-table th { background: var(--bg-soft); color: var(--ink-950); width: 34%; font-weight: 600; }
.spec-table tr:last-child td { border-bottom: 0; }

/* ---------- 案例页筛选 ---------- */
.case-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 34px; }
.filter-tabs { display: flex; gap: 10px; flex-wrap: wrap; }
.filter-tabs button {
  padding: 9px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text-2);
  font-size: 14px;
  transition: all .2s;
}
.filter-tabs button.active, .filter-tabs button:hover { background: var(--brand-600); border-color: var(--brand-600); color: #fff; }
.case-detail-modal {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10, 42, 91, .45);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center; justify-content: center;
  padding: 24px;
}
.case-detail-modal.open { display: flex; }
.modal-box {
  background: #fff; border-radius: var(--radius-lg);
  width: min(680px, 100%);
  max-height: 86vh; overflow-y: auto;
  padding: 36px 38px;
  position: relative;
  animation: pop .25s ease;
}
@keyframes pop { from { transform: translateY(18px) scale(.98); opacity: 0; } }
.modal-close {
  position: absolute; right: 18px; top: 18px;
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--line); background: #fff;
  font-size: 17px; color: var(--text-2);
}
.modal-close:hover { background: var(--bg-soft); }
.modal-head { display: flex; gap: 18px; align-items: center; padding-right: 40px; }
.modal-head img { width: 76px; height: 76px; border-radius: 50%; border: 1px solid var(--line); padding: 4px; object-fit: contain; background: #fff; }
.modal-head h3 { font-size: 21px; color: var(--ink-950); }
.modal-head small { color: var(--text-3); }
.modal-photo { width: 100%; aspect-ratio: 16/8.5; object-fit: cover; border-radius: var(--radius); margin-top: 22px; }
.modal-photo[hidden] { display: none; }
.modal-body { margin-top: 20px; color: var(--text-2); font-size: 14.5px; line-height: 1.9; }
.modal-body h5 { font-size: 15px; color: var(--ink-950); margin: 18px 0 8px; }
.modal-body li { position: relative; padding-left: 18px; margin-bottom: 6px; }
.modal-body li::before { content: ""; position: absolute; left: 2px; top: 11px; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-500); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: 56px; align-items: start; }
.contact-cards { display: grid; gap: 18px; }
.contact-card { display: flex; gap: 18px; padding: 24px 26px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.contact-card .ico { width: 50px; height: 50px; border-radius: 13px; background: var(--brand-100); color: var(--brand-600); display: grid; place-items: center; font-size: 23px; flex-shrink: 0; }
.contact-card h4 { font-size: 16px; color: var(--ink-950); }
.contact-card p { font-size: 14.5px; color: var(--text-2); margin-top: 3px; }

.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 36px 38px; box-shadow: var(--shadow-sm); }
.form-card h3 { font-size: 22px; color: var(--ink-950); }
.form-card .hint { color: var(--text-3); font-size: 13.5px; margin-top: 6px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 24px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13.5px; font-weight: 600; color: var(--text-1); }
.field label em { color: var(--accent-600); font-style: normal; }
.field input, .field textarea, .field select {
  border: 1.5px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  background: #FCFDFE;
  color: var(--text-1);
  transition: border-color .2s, box-shadow .2s;
  width: 100%;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px rgba(46,139,255,.15);
  background: #fff;
}
.form-note { margin-top: 18px; font-size: 13px; color: var(--text-3); }
.form-feedback { margin-top: 16px; padding: 13px 18px; border-radius: 10px; font-size: 14px; display: none; }
.form-feedback.ok { display: block; background: #E8F7F0; color: #147A4C; border: 1px solid #BEE7D4; }
.form-feedback.err { display: block; background: #FDECEC; color: #C0392B; border: 1px solid #F6CFCF; }

.map-mock {
  margin-top: 18px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  height: 240px;
  background:
    linear-gradient(0deg, rgba(27,111,232,.05), rgba(27,111,232,.05)),
    repeating-linear-gradient(0deg, #EAF1FB 0 38px, #F6FAFF 38px 40px),
    repeating-linear-gradient(90deg, #E2EDFB 0 38px, #F6FAFF 38px 40px);
  display: grid; place-items: center;
  color: var(--text-3); font-size: 14px; text-align: center;
}
.map-mock.contact-map { padding: 0; background: none; }
.map-mock.contact-map img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ---------- 悬浮客服 ---------- */
.float-tools { position: fixed; right: 18px; bottom: 28px; z-index: 90; display: grid; gap: 10px; }
.float-tools a {
  width: 52px; height: 52px; border-radius: 14px;
  background: #fff; box-shadow: var(--shadow);
  display: grid; place-items: center; font-size: 21px;
  border: 1px solid var(--line);
  transition: transform .2s;
}
.float-tools a:hover { transform: translateY(-3px); }
.float-tools .top { background: var(--brand-600); color: #fff; border-color: transparent; }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; transition: none !important; }
}

/* ---------- 骨架/空状态 ---------- */
.case-grid.is-loading { opacity: .65; }
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 70px 20px;
  color: var(--text-3);
  border: 1px dashed var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .section { padding: 72px 0; }
  .nav-menu { gap: 2px; }
  .nav-menu a { padding: 10px 11px; font-size: 14.5px; }
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-visual { max-width: 560px; }
  .about-split { grid-template-columns: 1fr; gap: 50px; }
  .about-split .visual { max-width: 520px; }
  .biz-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .metric-band { grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .promise-grid, .vision-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .sol-row { grid-template-columns: 1fr; gap: 30px; }
  .sol-row.reverse .pic { order: 0; }
  .sol-row + .sol-row { margin-top: 60px; }
  .contact-grid { grid-template-columns: 1fr; }
}

/* 平板及以下：导航折叠为汉堡菜单 */
@media (max-width: 980px) {
  .nav-menu {
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 18px 22px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .22s, transform .22s;
  }
  .nav-open .nav-menu { opacity: 1; transform: none; pointer-events: auto; }
  .nav-menu a { padding: 14px 10px; border-bottom: 1px solid var(--bg-soft); border-radius: 0; font-size: 15px; }
  .nav-menu a::after { display: none; }
  .nav-toggle { display: flex; }
  .nav-phone { display: none; }
}

@media (max-width: 760px) {
  .container { width: calc(100% - 36px); }
  .section { padding: 58px 0; }
  .head-row { margin-bottom: 36px; }

  .hero { padding-bottom: 70px; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 26px; }
  .hero-card { left: 8px; bottom: -18px; padding: 12px 16px; }
  .biz-grid, .case-grid, .adv-grid { grid-template-columns: 1fr; }
  .metric-band { grid-template-columns: repeat(2, 1fr); }
  .promise { flex-direction: column; }
  .cta-band { flex-direction: column; align-items: flex-start; padding: 38px 28px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; padding-bottom: 34px; }

  .feat-list, .form-grid { grid-template-columns: 1fr; }
  .form-card { padding: 28px 22px; }

  .timeline::before { left: 15px; }
  .tl-item { grid-template-columns: 30px 1fr; }
  .tl-year { grid-column: 2; text-align: left; order: 2; font-size: 16px; padding: 6px 0 0; }
  .tl-dot { grid-row: 1; grid-column: 1; }
  .tl-body { grid-column: 2; grid-row: 1; }
  .tl-dot::before { left: 15px; top: 20px; }

  .float-tools a { width: 46px; height: 46px; }
  .modal-box { padding: 28px 22px; }
}