/* ============================================================
   嘀友科技官网 · 简约版 共用样式
   维护说明：全站样式集中在该文件，修改一处全站生效
   ============================================================ */
:root {
  --blue: #1677FF;
  --blue-dark: #0958D9;
  --blue-light: #E8F1FF;
  --deep: #0B1B3A;
  --ink: #1F2329;
  --gray: #5B6B7F;
  --gray-l: #8A97A8;
  --line: #E8ECF2;
  --bg: #F6F8FB;
  --card: #FFFFFF;
  --radius: 14px;
  --shadow: 0 6px 20px rgba(11, 27, 58, .06);
  --shadow-hover: 0 12px 32px rgba(11, 27, 58, .12);
  --maxw: 1260px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { padding: 64px 0; }

/* ---------- 标题 ---------- */
.sec-head { text-align: center; margin-bottom: 40px; }
.sec-head .tag {
  display: inline-block; font-size: 13px; font-weight: 600; color: var(--blue);
  background: var(--blue-light); border-radius: 100px; padding: 4px 14px; margin-bottom: 12px;
}
.sec-head h2 { font-size: 28px; font-weight: 700; letter-spacing: .5px; }
.sec-head p { color: #35435C; font-size: 16px; margin-top: 8px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .container { display: flex; align-items: center; height: 60px; gap: 32px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand small { font-size: 11px; color: var(--gray-l); font-weight: 500; letter-spacing: 1px; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; margin-right: 18px; }
.nav a {
  font-size: 14.5px; color: var(--gray); padding: 6px 14px; border-radius: 8px; transition: .15s;
  line-height: 20px;
}
.nav a:hover { color: var(--blue); background: var(--blue-light); }
.nav a.on { color: var(--blue); font-weight: 600; }
/* 一级「产品」悬停下拉二级菜单 */
.nav-drop { position: relative; }
.nav-drop > a { display: inline-block; }
.nav-drop .drop {
  display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow-hover); padding: 8px; min-width: 170px; z-index: 120;
}
.nav-drop .drop::before { content: ''; position: absolute; top: -12px; left: 0; right: 0; height: 12px; }
.nav-drop:hover .drop, .nav-drop:focus-within .drop { display: block; }
.nav-drop .drop a { display: block; padding: 9px 14px; font-size: 14px; white-space: nowrap; border-radius: 8px; }
.nav-drop .drop a:hover { background: var(--blue-light); color: var(--blue-dark); }
.nav-drop .drop a.on { background: var(--blue-light); color: var(--blue-dark); font-weight: 700; }
.btn-nav {
  background: var(--blue); color: #fff !important; font-weight: 600;
  padding: 8px 18px !important; border-radius: 8px;
}
.btn-nav:hover { background: var(--blue-dark) !important; }
.menu-toggle { display: none; margin-left: auto; border: 0; background: none; font-size: 24px; cursor: pointer; color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  background: radial-gradient(circle at 80% 110%, #1059F9 0%, #043FAA 45%, #032C81 100%);
  color: #fff; padding: 88px 0 80px; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 56px 56px;
}
.hero .container { position: relative; text-align: center; }
.hero .pill {
  display: inline-block; font-size: 13px; color: #9FC4FF;
  border: 1px solid rgba(159, 196, 255, .4); border-radius: 100px; padding: 5px 16px; margin-bottom: 22px;
}
.hero h1 { font-size: 42px; font-weight: 800; line-height: 1.3; letter-spacing: 1px; }
.hero h1 .hl { color: #7FB3FF; }
.hero .sub { font-size: 17px; color: rgba(255, 255, 255, .82); margin-top: 16px; }
.hero .sub2 { font-size: 14px; color: rgba(255, 255, 255, .55); margin-top: 6px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; margin-top: 34px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 32px; border-radius: 10px; font-size: 15.5px; font-weight: 600;
  transition: .2s; cursor: pointer; border: 0;
}
.btn-primary { background: #fff; color: var(--blue-dark); box-shadow: 0 10px 28px rgba(0, 0, 0, .25); }
.btn-primary:hover { transform: translateY(-2px); }
.btn-ghost { background: rgba(255, 255, 255, .1); color: #fff; border: 1px solid rgba(255, 255, 255, .4); }
.btn-ghost:hover { background: rgba(255, 255, 255, .2); }
.btn-blue { background: var(--blue); color: #fff; box-shadow: 0 8px 22px rgba(22, 119, 255, .3); }
.btn-blue:hover { background: var(--blue-dark); transform: translateY(-2px); }

/* ---------- 数据条 ---------- */
.stats { background: var(--card); border-bottom: 1px solid var(--line); padding: 36px 0; }
.stats .container { display: flex; justify-content: center; gap: 72px; flex-wrap: wrap; }
.stat { text-align: center; }
.stat .num { font-size: 34px; font-weight: 800; color: var(--blue); line-height: 1.2; }
.stat .num small { font-size: 18px; font-weight: 700; }
.stat .lb { font-size: 13.5px; color: var(--gray); margin-top: 2px; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; transition: .2s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.card .ic {
  width: 46px; height: 46px; border-radius: 12px; background: var(--blue-light);
  display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 14px;
}
.card h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.card p { font-size: 13.5px; color: var(--gray); line-height: 1.75; }
.card ul { margin-top: 8px; }
.card ul li {
  font-size: 13.5px; color: var(--gray); padding-left: 16px; position: relative; line-height: 1.9;
}
.card ul li::before {
  content: ''; position: absolute; left: 2px; top: 12px; width: 5px; height: 5px;
  border-radius: 50%; background: var(--blue); opacity: .6;
}
.card ul li b { color: var(--ink); }

/* 编号卡（特色功能） */
.feat { position: relative; }
.feat .no {
  position: absolute; top: 18px; right: 20px; font-size: 26px; font-weight: 800;
  color: var(--blue-light);
}

/* ---------- 深浅交替区块 ---------- */
.sec-white { background: var(--card); }
.sec-deep { background: var(--deep); color: #fff; }
.sec-deep .sec-head h2 { color: #fff; }
.sec-deep .sec-head p { color: rgba(255, 255, 255, .6); }

/* ---------- 列表卡（资讯） ---------- */
.news-list { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.news-list a {
  display: flex; align-items: center; gap: 16px; padding: 15px 22px;
  border-bottom: 1px solid var(--line); font-size: 14.5px; transition: .15s;
}
.news-list a:last-child { border-bottom: 0; }
.news-list a:hover { background: var(--blue-light); color: var(--blue); }
.news-list .row {
  display: flex; align-items: center; gap: 16px; padding: 15px 22px;
  border-bottom: 1px solid var(--line); font-size: 14.5px; transition: .15s;
}
.news-list .row:last-child { border-bottom: 0; }
.news-list .row:hover { background: var(--blue-light); color: var(--blue); }
.news-list .t { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-list .d { font-size: 12.5px; color: var(--gray-l); flex: 0 0 auto; }

/* ---------- 协议/政策文档页 ---------- */
.doc-hero { background: var(--blue); color: #fff; padding: 56px 0; text-align: center; }
.doc-hero h1 { font-size: 30px; font-weight: 800; letter-spacing: 1px; }
.doc-hero p { color: rgba(255,255,255,.75); margin-top: 10px; font-size: 14px; }
.doc-wrap { max-width: 1060px; margin: 48px auto 72px; padding: 0 20px; }
.doc-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 44px 52px; }
.doc h2 { font-size: 20px; font-weight: 700; color: var(--ink); margin: 36px 0 14px; padding-left: 12px; border-left: 4px solid var(--blue); }
.doc h2:first-child { margin-top: 0; }
.doc h3 { font-size: 16px; font-weight: 700; color: var(--ink); margin: 24px 0 10px; }
.doc p { font-size: 14.5px; line-height: 1.9; color: var(--gray); margin-bottom: 12px; }
.doc .lead { color: var(--ink); }
.doc ul { margin: 0 0 14px 22px; }
.doc li { font-size: 14.5px; line-height: 1.9; color: var(--gray); margin-bottom: 6px; }
.doc table { width: 100%; border-collapse: collapse; margin: 14px 0 20px; font-size: 13px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; line-height: 1.6; }
.doc th { background: var(--blue-light); color: var(--blue-dark); font-weight: 600; white-space: nowrap; }
.doc td { color: var(--gray); }
.doc .tip { background: var(--blue-light); border-radius: 10px; padding: 14px 18px; font-size: 13.5px; color: var(--blue-dark); margin: 14px 0; }
.doc a { color: var(--blue); word-break: break-all; }
.doc .end { text-align: right; color: var(--gray-l); margin-top: 28px; font-size: 13px; }

/* ---------- 价格卡 ---------- */
.price-card { display: flex; flex-direction: column; text-align: center; position: relative; }.price-card .pname { font-size: 18px; font-weight: 700; }
.price-card .pfit { font-size: 12.5px; color: var(--gray-l); margin-top: 2px; }
.price-card .pprice { font-size: 40px; font-weight: 800; color: var(--ink); margin-top: 16px; line-height: 1; }
.price-card .pprice small { font-size: 14px; font-weight: 600; color: var(--gray-l); }
.price-card .pyear { font-size: 13px; color: var(--gray); margin-top: 6px; }
.price-card ul { text-align: left; margin: 18px 0 22px; flex: 1; }
.price-card ul li { font-size: 13.5px; color: var(--gray); padding: 5px 0 5px 22px; position: relative; }
.price-card ul li::before { content: '✓'; position: absolute; left: 2px; color: var(--blue); font-weight: 700; }
.price-card.hot { border: 2px solid var(--blue); box-shadow: 0 14px 36px rgba(22, 119, 255, .18); }
.price-card.hot .pprice { color: var(--blue); }
.price-card .hot-badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--blue); color: #fff; font-size: 12px; font-weight: 700;
  border-radius: 100px; padding: 4px 16px; white-space: nowrap;
}
.price-card .btn { justify-content: center; }
.btn-outline { background: #fff; color: var(--blue); border: 1.5px solid #C8DAFF; }
.btn-outline:hover { background: var(--blue-light); }

/* ---------- FAQ ---------- */
.faq { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:last-child { border-bottom: 0; }
.faq summary {
  cursor: pointer; padding: 17px 22px; font-size: 15px; font-weight: 600; list-style: none;
  display: flex; align-items: center; justify-content: space-between;
}
.faq summary::after { content: '+'; font-size: 20px; color: var(--gray-l); transition: .2s; }
.faq details[open] summary::after { transform: rotate(45deg); color: var(--blue); }
.faq .ans { padding: 0 22px 18px; font-size: 14px; color: var(--gray); }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background: linear-gradient(135deg, #043FAA, #1059F9);
  border-radius: 20px; padding: 52px 40px; text-align: center; color: #fff;
}
.cta-band h2 { font-size: 28px; font-weight: 800; }
.cta-band p { color: rgba(255, 255, 255, .8); margin-top: 10px; font-size: 15px; }
.cta-band .hero-actions { margin-top: 26px; }

/* ---------- 页脚 ---------- */
.site-footer { background: #0A1428; color: rgba(255, 255, 255, .65); font-size: 13.5px; margin-top: 64px; }
.site-footer .cols { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; padding: 48px 0 32px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.site-footer .f-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-size: 17px; font-weight: 700; margin-bottom: 12px; }
.site-footer .f-brand img { width: 34px; height: 34px; border-radius: 8px; }
.site-footer p { line-height: 2; }
.site-footer ul li { line-height: 2.1; }
.site-footer a:hover { color: #fff; }
.site-footer .kf { width: 92px; border-radius: 8px; margin-bottom: 8px; }
.f-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1); padding: 18px 0; text-align: center;
  font-size: 12.5px; color: rgba(255, 255, 255, .4);
}
.f-bottom a { color: rgba(255, 255, 255, .5); }
.f-bottom a:hover { color: #fff; }
.f-bottom span { margin: 0 8px; }

/* ---------- 页面内页头 ---------- */
.page-hero { background: linear-gradient(135deg, #032C81, #1059F9); color: #fff; padding: 56px 0; text-align: center; }
.page-hero h1 { font-size: 32px; font-weight: 800; }
.page-hero p { color: rgba(255, 255, 255, .75); margin-top: 10px; font-size: 15px; }

/* ---------- Hero V2（图文版 · 蓝底白字版） ---------- */
.hero-v2 {
  background: radial-gradient(circle at 85% 15%, #1060E8 0%, #043FAA 48%, #032C81 100%);
  color: #fff; padding: 72px 0 84px; position: relative; overflow: hidden;
}
.hero-v2 .container {
  position: relative; display: grid; grid-template-columns: 1fr 1.15fr;
  gap: 48px; align-items: center;
}
.hero-v2 .pill {
  display: inline-block; font-size: 13px; color: #9FC4FF;
  border: 1px solid rgba(159,196,255,.4); border-radius: 100px; padding: 5px 16px; margin-bottom: 20px;
}
.hero-v2 h1 { font-size: 40px; font-weight: 800; line-height: 1.3; letter-spacing: 1px; }
.hero-v2 h1 .hl { color: #7FB3FF; }
.hero-v2 .sub { font-size: 17px; color: rgba(255,255,255,.85); margin-top: 16px; font-weight: 600; }
.hero-v2 .sub2 { font-size: 14px; color: rgba(255,255,255,.55); margin-top: 8px; }
.hero-v2 .hero-actions { justify-content: flex-start; margin-top: 30px; }
.hero-v2 .mini-stats { display: flex; gap: 32px; margin-top: 36px; }
.hero-v2 .mini-stats .ms .n { font-size: 26px; font-weight: 800; color: #fff; }
.hero-v2 .mini-stats .ms .n small { font-size: 15px; }
.hero-v2 .mini-stats .ms .l { font-size: 12.5px; color: rgba(255,255,255,.55); }
.hero-visual { position: relative; }
.hero-visual img {
  border-radius: 12px; position: relative; z-index: 2;
}

/* ---------- 客户 Logo 墙 ---------- */
.logo-wall { padding: 24px 0 8px; overflow: hidden; }
.logo-wall .lw-title {
  text-align: center; font-size: 13.5px; color: var(--gray-l); margin-bottom: 22px; letter-spacing: 1px;
}
.marquee { overflow: hidden; position: relative; }
.marquee::before, .marquee::after {
  content: ''; position: absolute; top: 0; bottom: 0; width: 90px; z-index: 2; pointer-events: none;
}
.marquee::before { left: 0; background: linear-gradient(90deg, var(--bg), transparent); }
.marquee::after { right: 0; background: linear-gradient(-90deg, var(--bg), transparent); }
.marquee-track {
  display: flex; gap: 14px; width: max-content;
  transition: transform .9s cubic-bezier(.4, 0, .2, 1); will-change: transform;
}
@keyframes scroll { to { transform: translateX(-50%); } }
.marquee-track .lg {
  flex: 0 0 auto; width: 172px; height: 64px; background: #fff; border: 1px solid var(--line);
  border-radius: 10px; display: flex; align-items: center; justify-content: center; padding: 8px 12px;
}
.marquee-track .lg img { max-width: 100%; max-height: 46px; object-fit: contain; }

/* ---------- 客户 Logo 网格（静态平铺，全部一起显示） ---------- */
.logo-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.logo-grid .lg {
  height: 66px; background: #fff; border: 1px solid var(--line); border-radius: 10px;
  display: flex; align-items: center; justify-content: center; padding: 8px 12px; transition: .2s;
}
.logo-grid .lg:hover { border-color: #C7D7F5; box-shadow: var(--shadow-hover); }
.logo-grid .lg img { max-width: 100%; max-height: 48px; object-fit: contain; }
@media (max-width: 1240px) { .logo-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 700px) { .logo-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- 截图展示（Tab切换 + 浏览器框） ---------- */
.shot-tabs { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 26px; }
.shot-tabs button {
  border: 1.5px solid var(--line); background: #fff; color: var(--gray);
  font-family: inherit; font-size: 14.5px; font-weight: 600; border-radius: 100px;
  padding: 9px 22px; cursor: pointer; transition: .18s;
}
.shot-tabs button:hover { border-color: #C8DAFF; color: var(--blue); }
.shot-tabs button.on { background: var(--blue); border-color: var(--blue); color: #fff; box-shadow: 0 8px 20px rgba(22,119,255,.28); }
.browser-frame {
  background: #fff; border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  box-shadow: 0 24px 60px rgba(11, 27, 58, .14); max-width: 1180px; margin: 0 auto;
}
.browser-frame .bf-bar {
  display: flex; align-items: center; gap: 8px; padding: 11px 16px;
  background: #F2F5FA; border-bottom: 1px solid var(--line);
}
.browser-frame .bf-bar .dot { width: 11px; height: 11px; border-radius: 50%; }
.browser-frame .bf-bar .d1 { background: #FF5F57; } .browser-frame .bf-bar .d2 { background: #FEBC2E; } .browser-frame .bf-bar .d3 { background: #28C840; }
.browser-frame .bf-bar .bf-title { margin-left: 10px; font-size: 12.5px; color: var(--gray-l); }
.browser-frame .bf-body { display: none; }
.browser-frame .bf-body.on { display: block; animation: fade .3s; }
.browser-frame img { width: 100%; display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ---------- 图文分栏区块 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.split.rev > .split-img { order: 2; }
.split-img img { border-radius: 14px; box-shadow: 0 18px 46px rgba(11, 27, 58, .14); border: 1px solid var(--line); }
.split-txt h3 { font-size: 24px; font-weight: 800; margin-bottom: 12px; }
.split-txt .st-tag {
  display: inline-block; font-size: 12.5px; font-weight: 700; color: var(--blue);
  background: var(--blue-light); border-radius: 100px; padding: 3px 12px; margin-bottom: 12px;
}
.split-txt p { color: var(--gray); font-size: 14.5px; }
.split-txt ul { margin-top: 14px; }
.split-txt ul li { font-size: 14px; color: var(--gray); padding: 5px 0 5px 24px; position: relative; }
.split-txt ul li::before { content: '✓'; position: absolute; left: 0; color: var(--blue); font-weight: 800; }

/* ---------- 手机截图 ---------- */
.phone-row { display: flex; justify-content: center; gap: 28px; flex-wrap: wrap; }
.phone {
  width: 220px; border-radius: 26px; overflow: hidden; background: #fff;
  border: 6px solid #101828; box-shadow: 0 20px 50px rgba(11, 27, 58, .22); transition: .25s;
}
.phone:hover { transform: translateY(-8px); }
.phone img { width: 100%; display: block; }
.phone-cap { text-align: center; font-size: 13px; color: var(--gray); margin-top: 10px; }

/* ---------- 二维码卡 ---------- */
.qr-cards { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.qr-card {
  background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 18px;
  text-align: center; width: 168px; transition: .2s;
}
.qr-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.qr-card img { width: 120px; height: 120px; object-fit: contain; margin: 0 auto 10px; border-radius: 8px; }
.qr-card .t { font-size: 14px; font-weight: 700; }
.qr-card .d { font-size: 12px; color: var(--gray-l); margin-top: 2px; }

/* ---------- 违章工作台截图墙 ---------- */
.wz-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.wz-grid figure { position: relative; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); }
.wz-grid img { width: 100%; display: block; transition: .3s; }
.wz-grid figure:hover img { transform: scale(1.02); }
.wz-grid figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 16px 12px;
  background: linear-gradient(transparent, rgba(10, 20, 40, .78));
  color: #fff; font-size: 13.5px; font-weight: 600;
}

/* ---------- GPS 硬件卡 ---------- */
.hw-card { text-align: center; padding: 20px; }
.hw-card img { width: 100%; border-radius: 12px; margin-bottom: 14px; border: 1px solid var(--line); }

/* ---------- 客户评价 ---------- */
.quote-card { position: relative; padding-top: 40px; }
.quote-card::before {
  content: '"'; position: absolute; top: 8px; left: 22px;
  font-size: 64px; font-weight: 800; color: var(--blue-light); line-height: 1;
  font-family: Georgia, serif;
}
.quote-card .who { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
.quote-card .avatar {
  width: 42px; height: 42px; border-radius: 50%; background: var(--blue-light);
  color: var(--blue); font-weight: 800; display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex: 0 0 42px;
}
.quote-card .who .nm { font-size: 15px; font-weight: 700; }
.quote-card .who .co { font-size: 12.5px; color: var(--gray-l); }

/* ---------- 案例卡 ---------- */
.case-card { display: flex; flex-direction: column; }
.case-card .ct { font-size: 16.5px; font-weight: 700; line-height: 1.5; }
.case-card .cd { font-size: 13.5px; color: var(--gray); margin-top: 10px; flex: 1; }
.case-card .cm {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line);
  font-size: 12.5px; color: var(--gray-l);
}
.case-card .cm a { color: var(--blue); font-weight: 600; }

/* ---------- 资质证书 ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.cert {
  background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 12px;
  text-align: center; transition: .2s;
}
.cert:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.cert .cw { border-radius: 10px; overflow: hidden; background: #F2F5FA; }
.cert img { width: 100%; height: 220px; object-fit: cover; object-position: top center; }
.cert.wide img { height: 240px; object-fit: contain; }
.cert .t { font-size: 13.5px; font-weight: 700; margin-top: 10px; }
.cert .d { font-size: 12px; color: var(--gray-l); }

/* ---------- 产品视频 ---------- */
.video-box {
  max-width: 1080px; margin: 0 auto; border-radius: 16px; overflow: hidden;
  box-shadow: 0 24px 60px rgba(11, 27, 58, .16); border: 1px solid var(--line);
  background: #000;
}
.video-box video { width: 100%; display: block; }

/* ---------- 二级子导航（产品页族） ---------- */
.subnav { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 60px; z-index: 90; }
.subnav .container { display: flex; gap: 8px; overflow-x: auto; }
.subnav a {
  flex: 0 0 auto; font-size: 14.5px; color: var(--gray); font-weight: 600;
  padding: 13px 18px; border-bottom: 2.5px solid transparent; transition: .15s; white-space: nowrap;
}
.subnav a:hover { color: var(--blue); }
.subnav a.on { color: var(--blue); border-bottom-color: var(--blue); }
@media (max-width: 640px) { .subnav { top: 60px; } .subnav .container { gap: 4px; } .subnav a { padding: 11px 13px; font-size: 13.5px; } }

/* ---------- 深色区卡片反白 ---------- */
.sec-deep .card { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.12); }
.sec-deep .card:hover { background: rgba(255,255,255,.1); box-shadow: none; }
.sec-deep .card h3 { color: #fff; }
.sec-deep .card p { color: rgba(255,255,255,.62); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .site-footer .cols { grid-template-columns: repeat(2, 1fr); }
  .stats .container { gap: 36px; }
  .hero-v2 .container { grid-template-columns: 1fr; gap: 40px; }
  .hero-v2 h1 { font-size: 30px; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .split, .split.rev { grid-template-columns: 1fr; gap: 24px; }
  .split.rev > .split-img { order: 0; }
}
@media (max-width: 640px) {
  section { padding: 44px 0; }
  .hero { padding: 60px 0 52px; }
  .hero h1 { font-size: 27px; }
  .hero .sub { font-size: 15px; }
  .grid-2, .grid-3, .grid-4, .grid-5, .wz-grid, .cert-grid { grid-template-columns: 1fr; }
  .hero-v2 .mini-stats { gap: 20px; flex-wrap: wrap; }
  .sec-head h2 { font-size: 22px; }
  .menu-toggle { display: block; }
  .nav {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 12px 16px;
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow-hover);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 14px; }
  /* 移动端菜单：二级菜单直接展开为缩进列表 */
  .nav-drop .drop {
    display: block; position: static; transform: none;
    border: none; box-shadow: none; padding: 0 0 0 14px; min-width: 0;
  }
  .site-footer .cols { grid-template-columns: 1fr; gap: 24px; }
  .cta-band { padding: 40px 24px; }
}