/* ============================================================
   成都迅博科技有限公司 官方网站 全局样式
   配色对齐官网 www.sunpol.com.cn：白底 + 蓝紫渐变导航
   主蓝 #3C7AF5 · 导航渐变 #6E63C0→#347FE3 · 点缀橙 #F69E3D · 页脚 #2C3C6D
   ============================================================ */
:root {
  --blue: #3C7AF5;
  --blue-deep: #2C3C6D;
  --blue-darker: #6E63C0;
  --blue-light: #347FE3;
  --orange: #F69E3D;
  --orange-dark: #E08A24;
  --text: #1D2130;
  --muted: #3E4451;
  --bg-light: #F4F7FB;
  --border: #D9E1EE;
  --shadow: 0 8px 30px rgba(60, 122, 245, .12);
  --radius: 10px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--muted);
  line-height: 1.75;
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .25s; }
ul, ol { list-style: none; }
.container { width: 1200px; max-width: 92%; margin: 0 auto; }
.section { padding: 84px 0; }
.section.gray { background: var(--bg-light); }
/* ---------- 通用板块标题 ---------- */
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head .en {
  display: inline-block; font-size: 14px; letter-spacing: 4px;
  color: var(--orange); font-weight: 700; text-transform: uppercase;
}
.sec-head h2 { font-size: 34px; color: var(--text); margin-top: 6px; font-weight: 700; }
.sec-head .line { width: 56px; height: 4px; background: var(--orange); margin: 16px auto 0; border-radius: 2px; }
.sec-head p { color: var(--muted); margin-top: 14px; font-size: 15px; }
.sec-head.light h2, .sec-head.light p { color: #fff; }
.sec-head.light p { opacity: .75; }
/* ---------- 主导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 1000;
  background: linear-gradient(120deg, var(--blue-darker) 0%, var(--blue-light) 50%);
  box-shadow: 0 2px 14px rgba(60, 122, 245, .30);
}
.header .container { display: flex; align-items: center; justify-content: space-between; height: 106px; width: 1360px; max-width: 96%; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { height: 25px; width: auto; }
.nav > ul { display: flex; align-items: center; }
.nav > ul > li { position: relative; }
.nav > ul > li > a {
  display: block; color: rgba(255,255,255,.94); font-size: 16px;
  padding: 25px 22px; position: relative;
}
.nav > ul > li > a::after {
  content: ""; position: absolute; left: 22px; right: 22px; bottom: 16px;
  height: 3px; background: var(--orange); border-radius: 2px;
  transform: scaleX(0); transition: transform .3s; transform-origin: left;
}
.nav > ul > li > a:hover, .nav > ul > li.active > a { color: #fff; }
.nav > ul > li > a:hover::after, .nav > ul > li.active > a::after { transform: scaleX(1); }
/* 下拉菜单 */
.dropdown-menu {
  position: absolute; top: 100%; left: 50%; transform: translate(-50%, 12px);
  min-width: 300px; background: #fff; border-radius: 8px; box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transition: all .25s; padding: 10px 0;
  border-top: 3px solid var(--orange);
}
.dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.dropdown-menu li a {
  display: flex; align-items: center; gap: 10px; padding: 11px 22px;
  color: var(--text); font-size: 14.5px; border-bottom: 1px dashed var(--border);
}
.dropdown-menu li:last-child a { border-bottom: none; }
.dropdown-menu li a i {
  font-style: normal; color: var(--orange); font-weight: 700; font-size: 12px;
  border: 1px solid var(--orange); border-radius: 4px; padding: 0 5px; line-height: 18px;
}
.dropdown-menu li a:hover { color: var(--blue); background: var(--bg-light); padding-left: 28px; }
.nav-toggle { display: none; }
/* ---------- 首页 Banner 轮播 ---------- */
.hero { position: relative; height: 640px; overflow: hidden; }
 .hero-slide {
  position: absolute; inset: 0; opacity: 0; transition: opacity 1.1s ease;
  background-size: cover; background-position: center;
  filter: contrast(1.05) saturate(1.08);
  pointer-events: none;
}
.hero-slide.active { opacity: 1; pointer-events: auto; }
.hero-inner { position: relative; z-index: 2; height: 100%; display: flex; align-items: center; }
.hero-text { max-width: 720px; color: #fff; }
.hero-text .tag {
  display: inline-block; font-size: 14px; letter-spacing: 6px; color: var(--orange);
  border: 1px solid rgba(243,152,0,.6); padding: 6px 18px; border-radius: 30px; margin-bottom: 22px;
}
.hero-text h1 { font-size: 46px; line-height: 1.35; font-weight: 700; letter-spacing: 2px; text-shadow: 0 2px 8px rgba(6,12,32,.45); }
.hero-text h1 span { color: var(--orange); text-shadow: 0 2px 8px rgba(6,12,32,.45); }
.hero-text p { margin-top: 20px; font-size: 18px; color: rgba(255,255,255,.94); line-height: 1.9; text-shadow: 0 1px 4px rgba(6,12,32,.5); }
.hero-btns { margin-top: 36px; display: flex; gap: 18px; }
.btn {
  display: inline-block; padding: 13px 36px; border-radius: 4px; font-size: 16px;
  letter-spacing: 2px; transition: all .3s; cursor: pointer; border: none;
}
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: var(--orange-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(246,158,61,.4); }
.btn-ghost { border: 1px solid rgba(255,255,255,.7); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: var(--blue-deep); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(60,122,245,.35); }
.hero-dots { position: absolute; z-index: 3; bottom: 28px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; }
.hero-dots span { width: 34px; height: 4px; background: rgba(255,255,255,.35); border-radius: 2px; cursor: pointer; transition: background .3s; }
.hero-dots span.active { background: var(--orange); }
/* ---------- 数据统计带 ---------- */
.stats { background: linear-gradient(120deg, var(--blue-darker) 0%, var(--blue) 50%); padding: 46px 0; }
.stats .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat-item { text-align: center; color: #fff; position: relative; }
.stat-item + .stat-item::before {
  content: ""; position: absolute; left: -10px; top: 15%; height: 70%; width: 1px;
  background: rgba(255,255,255,.18);
}
.stat-item .num { font-size: 40px; font-weight: 700; color: var(--orange); line-height: 1.2; }
.stat-item .num small { font-size: 20px; margin-left: 2px; }
.stat-item .label { font-size: 15px; color: rgba(255,255,255,.85); margin-top: 4px; letter-spacing: 1px; }
/* ---------- 产品卡片（首页） ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.prod-grid .prod-card:first-child { grid-column: span 2; }
.prod-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 4px 18px rgba(60,122,245,.08); border: 1px solid var(--border);
  transition: all .35s; display: flex; flex-direction: column; position: relative;
}
.prod-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-color: rgba(246,158,61,.5); }
.prod-card .idx {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  background: rgba(44,60,109,.78); color: #fff; font-size: 12px; padding: 3px 12px;
  border-radius: 20px; letter-spacing: 1px;
}
.prod-card .idx b { color: var(--orange); }
.prod-card .pic { height: 210px; overflow: hidden; background: var(--bg-light); border-radius: var(--radius); padding-top: 14px; }
.prod-card:first-child .pic { height: 260px; }
.prod-card .pic img { width: auto; height: 100%; max-width: 100%; object-fit: contain; margin: 0 auto; transition: transform .6s; border-radius: 24px; }
.pic-fit { object-fit: contain !important; }

.prod-card:hover .pic img { transform: scale(1.02); }
.prod-card .body { padding: 24px 26px 26px; flex: 1; display: flex; flex-direction: column; }
.prod-card h3 { font-size: 19px; color: var(--text); line-height: 1.5; }
.prod-card .desc { color: var(--muted); font-size: 14.5px; margin-top: 10px; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.prod-card .more { margin-top: 16px; color: var(--blue); font-size: 14px; font-weight: 700; letter-spacing: 1px; }
.prod-card .more::after { content: " →"; transition: margin .3s; }
.prod-card:hover .more::after { margin-left: 6px; }
/* ---------- 行业应用卡片 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.app-card {
  background: #fff; border-radius: var(--radius); padding: 38px 30px;
  box-shadow: 0 4px 18px rgba(60,122,245,.08); border-top: 4px solid var(--blue);
  transition: all .35s;
}
.app-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-top-color: var(--orange); }
.app-card .icon {
  width: 66px; height: 66px; border-radius: 50%; margin-bottom: 22px;
  background: linear-gradient(135deg, var(--blue-darker), var(--blue-light));
  display: flex; align-items: center; justify-content: center;
}
.app-card .icon svg { width: 32px; height: 32px; fill: #fff; }
.app-card h3 { font-size: 20px; color: var(--text); margin-bottom: 12px; }
.app-card p { color: var(--muted); font-size: 14px; }
.app-card .tags { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; }
.app-card .tags span {
  font-size: 13.5px; color: var(--blue); background: var(--bg-light);
  border: 1px solid var(--border); padding: 3px 12px; border-radius: 20px;
}
/* ---------- 关于迅博 strip ---------- */
.about-strip { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.about-strip .pic { border-radius: var(--radius); overflow: hidden; background: #fff; position: relative; padding-top: 14px; }
.about-strip .pic img { border-radius: 16px; }
.about-strip .pic::after {
  content: ""; position: absolute; inset: 0; border: 1px solid rgba(255,255,255,.25); border-radius: var(--radius);
}
.about-strip .txt .en { color: var(--orange); letter-spacing: 4px; font-size: 14px; font-weight: 700; }
.about-strip .txt h2 { font-size: 32px; color: var(--text); margin: 8px 0 20px; }
.about-strip .txt p { color: var(--muted); font-size: 15px; margin-bottom: 14px; text-align: justify; }
/* ---------- 服务支持 strip ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.svc-item {
  background: #fff; border-radius: var(--radius); padding: 34px 24px; text-align: center;
  box-shadow: 0 4px 18px rgba(60,122,245,.08); transition: all .35s; border: 1px solid var(--border);
}
.svc-item:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.svc-item .icon {
  width: 62px; height: 62px; margin: 0 auto 18px; border-radius: 16px;
  background: linear-gradient(135deg, var(--orange), #ffb63d);
  display: flex; align-items: center; justify-content: center;
}
.svc-item .icon svg { width: 30px; height: 30px; fill: #fff; }
.svc-item h3 { font-size: 18px; color: var(--text); margin-bottom: 10px; }
.svc-item p { font-size: 14px; color: var(--muted); }
/* ---------- 加入我们（招聘平台） ---------- */
.join-text { max-width: 960px; margin: 0 auto; color: var(--muted); font-size: 15.5px; line-height: 2; text-align: justify; }
.join-platforms { display: flex; flex-wrap: wrap; justify-content: center; gap: 24px; margin-top: 26px; }
.join-platforms a {
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  padding: 16px 30px; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(60,122,245,.08); transition: all .3s;
}
.join-platforms a:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(60,122,245,.18); border-color: var(--blue); }
.join-platforms img { height: 46px; width: auto; border-radius: 12px; }
/* ---------- CTA ---------- */
.cta {
  background: linear-gradient(120deg, var(--blue-darker) 0%, var(--blue) 50%);
  padding: 64px 0; text-align: center; color: #fff;
}
.cta h2 { font-size: 30px; letter-spacing: 2px; }
.cta p { margin: 14px 0 28px; color: rgba(255,255,255,.8); font-size: 16px; }
.cta p b { color: var(--orange); font-size: 20px; letter-spacing: 1px; }
/* ---------- 页脚 ---------- */
.footer { background: var(--blue-deep); color: rgba(255,255,255,.78); }
.footer-main { padding: 64px 0 44px; display: grid; grid-template-columns: 1.3fr 1fr 1.2fr 1.3fr; gap: 44px; }
.footer h4 { color: #fff; font-size: 17px; margin-bottom: 20px; position: relative; padding-bottom: 12px; }
.footer h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 34px; height: 3px; background: var(--orange); border-radius: 2px; }
.footer .f-logo { height: 16px; margin-bottom: 18px; }
.footer .f-desc { font-size: 14px; line-height: 1.9; }
.footer-links li { margin-bottom: 10px; font-size: 14px; }
.footer-links li a:hover { color: var(--orange); }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 12px; font-size: 14px; line-height: 1.7; }
.footer-contact li .k { color: var(--orange); flex-shrink: 0; }
.footer-qr .qr-row { display: flex; gap: 12px; }
.footer-qr .qr-item { flex: 1; min-width: 0; text-align: center; display: flex; flex-direction: column; align-items: center; }
.footer-qr .qr-item img { width: 120px; height: 120px; border-radius: 8px; background: #fff; padding: 5px; }
.footer-qr .qr-item p { font-size: 12px; margin-top: 8px; line-height: 1.5; }
.footer-copy {
  border-top: 1px solid rgba(255,255,255,.12); padding: 18px 0; text-align: center;
  font-size: 13.5px; color: rgba(255,255,255,.6);
}
/* ---------- 内页 Banner ---------- */
.page-banner {
  height: 320px; background: linear-gradient(115deg, var(--blue-darker) 0%, var(--blue-light) 50%);
  position: relative; display: flex; align-items: center; overflow: hidden;
}
.page-banner::before {
  content: ""; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px;
  border-radius: 50%; border: 60px solid rgba(246,158,61,.14);
}
.page-banner::after {
  content: ""; position: absolute; right: 180px; bottom: -160px; width: 300px; height: 300px;
  border-radius: 50%; background: rgba(255,255,255,.05);
}
.page-banner .container { position: relative; z-index: 2; }
.page-banner .en { color: var(--orange); letter-spacing: 5px; font-size: 14px; font-weight: 700; text-transform: uppercase; }
.page-banner h1 { color: #fff; font-size: 40px; letter-spacing: 3px; margin-top: 8px; }
.page-banner .crumb { color: rgba(255,255,255,.7); font-size: 14px; margin-top: 14px; }
.page-banner .crumb a:hover { color: var(--orange); }
/* ---------- 产品中心总览页 ---------- */
.prod-row {
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 54px; align-items: center;
  padding: 54px 0; border-bottom: 1px solid var(--border);
}
.prod-row:last-child { border-bottom: none; }
.prod-row:nth-child(even) { direction: rtl; }
.prod-row:nth-child(even) > * { direction: ltr; }
.prod-row .pic { height: 320px; border-radius: var(--radius); overflow: hidden; background: #fff; padding-top: 14px; }
.prod-row .pic img { width: auto; height: 100%; max-width: 100%; object-fit: contain; margin: 0 auto; transition: transform .6s; border-radius: 24px; }
.prod-row .pic:hover img { transform: scale(1.02); }
.prod-row .num { font-size: 52px; font-weight: 800; color: rgba(60,122,245,.15); line-height: 1; }
.prod-row h3 { font-size: 26px; color: var(--text); margin: 6px 0 14px; }
.prod-row h3 small { display: block; font-size: 14px; color: var(--orange); letter-spacing: 2px; margin-top: 6px; }
.prod-row p { color: var(--muted); font-size: 15px; text-align: justify; }
.prod-row .feats { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 26px; }
.prod-row .feats span {
  font-size: 13px; color: var(--blue); background: var(--bg-light);
  border: 1px solid var(--border); border-radius: 20px; padding: 4px 16px;
}
/* ---------- 产品详情页 ---------- */
.pd-hero {
  background: linear-gradient(115deg, var(--blue-darker) 0%, var(--blue-light) 50%);
  color: #fff; padding: 70px 0; position: relative; overflow: hidden;
}
.pd-hero::after {
  content: ""; position: absolute; right: -100px; top: -140px; width: 400px; height: 400px;
  border-radius: 50%; border: 56px solid rgba(246,158,61,.13);
}
.pd-hero .container { display: grid; grid-template-columns: 1.2fr .9fr; gap: 50px; align-items: center; position: relative; z-index: 2; }
.pd-hero .tagline { color: var(--orange); letter-spacing: 5px; font-size: 15px; font-weight: 700; }
.pd-hero h1 { font-size: 38px; margin: 12px 0 18px; line-height: 1.4; }
.pd-hero .lead { color: rgba(255,255,255,.85); font-size: 15.5px; text-align: justify; }
.pd-hero .hero-pic { border-radius: var(--radius); overflow: hidden; background: #fff; padding-top: 14px; }
.pd-hero .hero-pic img { width: auto; max-width: 100%; height: auto; max-height: 340px; object-fit: contain; margin: 0 auto; border-radius: 24px; }
.pd-hero .kpis { display: flex; gap: 34px; margin-top: 28px; flex-wrap: wrap; }
.pd-hero .kpis div b { display: block; font-size: 30px; color: var(--orange); }
.pd-hero .kpis div span { font-size: 13px; color: rgba(255,255,255,.75); }
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feat-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.feat-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.feat-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 26px; transition: all .3s; position: relative; overflow: hidden;
}
.feat-card::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--orange));
  transform: scaleX(0); transform-origin: left; transition: transform .35s;
}
.feat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.feat-card:hover::before { transform: scaleX(1); }
.feat-card .no { font-size: 15px; font-weight: 800; color: var(--orange); letter-spacing: 1px; }
.feat-card h3 { font-size: 18px; color: var(--text); margin: 8px 0 10px; }
.feat-card h3 .star { color: var(--orange); }
.feat-card p { font-size: 14px; color: var(--muted); text-align: justify; }
/* 流程步骤 */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; counter-reset: step; }
.flow .step {
  background: #fff; border-radius: var(--radius); border: 1px solid var(--border);
  padding: 28px 16px; text-align: center; position: relative; transition: all .3s;
}
.flow .step:hover { border-color: var(--orange); transform: translateY(-5px); box-shadow: var(--shadow); }
.flow .step .n {
  width: 46px; height: 46px; line-height: 46px; margin: 0 auto 14px; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--blue-light)); color: #fff;
  font-size: 18px; font-weight: 700;
}
.flow .step h4 { font-size: 15.5px; color: var(--text); }
.flow .step p { font-size: 13.5px; color: var(--muted); margin-top: 8px; }
.flow .step:not(:last-child)::after {
  content: "›"; position: absolute; right: -14px; top: 40%; font-size: 26px; color: var(--orange); font-weight: 700;
}
/* 图文分栏 */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split.reverse { direction: rtl; }
.split.reverse > * { direction: ltr; }
.split .pic { border-radius: var(--radius); overflow: hidden; background: #fff; padding-top: 14px; }
.split .pic img { border-radius: 16px; }
.split .txt h3 { font-size: 26px; color: var(--text); margin-bottom: 18px; }
.split .txt h3 span { color: var(--orange); }
.split .txt > p { color: var(--muted); font-size: 15px; margin-bottom: 16px; text-align: justify; }
.check-list li { display: flex; gap: 12px; margin-bottom: 14px; font-size: 15px; color: var(--text); }
.check-list li::before {
  content: "✓"; flex-shrink: 0; width: 24px; height: 24px; line-height: 24px; text-align: center;
  background: var(--orange); color: #fff; border-radius: 50%; font-size: 13px; margin-top: 3px;
}
.check-list li b { color: var(--blue-deep); }
/* 参数表 */
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: 0 4px 18px rgba(60,122,245,.08); }
.spec-table th, .spec-table td { padding: 15px 22px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--border); }
.spec-table th { background: var(--blue-deep); color: #fff; font-weight: 600; width: 220px; letter-spacing: 1px; }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: none; }
.spec-table td { color: var(--muted); }
/* 上下产品导航 */
.pd-nav { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--border); }
.pd-nav a {
  padding: 26px 34px; font-size: 15px; color: var(--muted); transition: all .3s;
  display: flex; flex-direction: column; gap: 4px;
}
.pd-nav a b { color: var(--text); font-size: 17px; }
.pd-nav a:hover { background: var(--bg-light); }
.pd-nav a:hover b { color: var(--blue); }
.pd-nav a.next { text-align: right; border-left: 1px solid var(--border); }
/* ---------- 招聘 ---------- */
.job-list { display: grid; gap: 18px; }
.job-item {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 32px; display: grid; grid-template-columns: 1fr auto; gap: 8px 24px;
  align-items: center; transition: all .3s;
}
.job-item:hover { box-shadow: var(--shadow); border-color: rgba(246,158,61,.5); }
.job-item h3 { font-size: 19px; color: var(--text); }
.job-item h3 span { font-size: 13px; color: var(--orange); margin-left: 12px; font-weight: 600; }
.job-item .req { grid-column: 1 / -1; color: var(--muted); font-size: 14px; }
.job-item .mail { color: var(--blue); font-size: 14px; font-weight: 600; white-space: nowrap; }
/* ---------- 联系卡片 ---------- */
.contact-cards { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.contact-card {
  background: #fff; border-radius: var(--radius); border: 1px solid var(--border);
  padding: 34px 30px; text-align: center; transition: all .3s;
}
.contact-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.contact-card h3 { color: var(--text); font-size: 18px; margin: 14px 0 8px; }
.contact-card p { color: var(--muted); font-size: 14.5px; }
.contact-card p b { color: var(--blue); }
.contact-card .icon {
  width: 60px; height: 60px; margin: 0 auto; border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-darker), var(--blue-light));
  display: flex; align-items: center; justify-content: center;
}
.contact-card .icon svg { width: 28px; height: 28px; fill: #fff; }
/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed; right: 30px; bottom: 40px; z-index: 900;
  width: 48px; height: 48px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--blue); color: #fff; font-size: 20px; box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transition: all .3s;
}
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--orange); }
/* ---------- 滚动动画 ---------- */
.fade-up { opacity: 0; transform: translateY(36px); transition: opacity .8s ease, transform .8s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .container { max-width: 94%; }
  .nav > ul > li > a { padding: 25px 12px; font-size: 15px; }
  .hero { height: 520px; }
  .hero-text h1 { font-size: 34px; }
  .prod-grid, .app-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid .prod-card:first-child { grid-column: span 2; }
  .svc-grid, .stats .container { grid-template-columns: repeat(2, 1fr); }
  .stat-item { margin-bottom: 18px; }
  .feat-grid, .feat-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .about-strip, .split, .pd-hero .container, .prod-row { grid-template-columns: 1fr; gap: 34px; }
  .prod-row:nth-child(even) { direction: ltr; }
  .footer-main { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .flow .step::after { display: none; }
  .contact-cards { grid-template-columns: 1fr; }
  .join-platforms { gap: 16px; }
  .join-platforms a { padding: 14px 24px; }
}
@media (max-width: 640px) {
  .header .container { height: 74px; }
  .logo img { height: 14px; }
  .nav {
    position: fixed; top: 62px; left: 0; right: 0; z-index: 999;
    background: var(--blue-darker); max-height: 0; overflow: hidden; transition: max-height .4s;
  }
  .nav.open { max-height: 520px; overflow-y: auto; }
  .nav > ul { flex-direction: column; align-items: stretch; }
  .nav > ul > li > a { padding: 14px 24px; border-top: 1px solid rgba(255,255,255,.08); }
  .dropdown-menu { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; border-radius: 0; min-width: 0; background: rgba(255,255,255,.05); border-top: none; }
  .dropdown-menu li a { color: rgba(255,255,255,.85); border-bottom: none; padding: 10px 40px; }
  .nav-toggle {
    display: block; background: none; border: none; cursor: pointer;
    width: 40px; height: 40px; position: relative;
  }
  .nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
    content: ""; display: block; width: 24px; height: 2px; background: #fff;
    position: absolute; left: 8px; transition: all .3s;
  }
  .nav-toggle span { top: 19px; }
  .nav-toggle span::before { top: -7px; left: 0; }
  .nav-toggle span::after { top: 7px; left: 0; }
  .hero { height: 460px; }
  .hero-text h1 { font-size: 27px; }
  .hero-btns { flex-wrap: wrap; }
  .section { padding: 56px 0; }
  .sec-head h2 { font-size: 26px; }
  .prod-grid, .app-grid, .feat-grid, .feat-grid.cols-2, .feat-grid.cols-4, .svc-grid { grid-template-columns: 1fr; }
  .prod-grid .prod-card:first-child { grid-column: span 1; }
  .stats .container { grid-template-columns: repeat(2,1fr); }
  .footer-main { grid-template-columns: 1fr; gap: 30px; }
  .flow { grid-template-columns: 1fr; }
  .page-banner { height: 230px; }
  .page-banner h1 { font-size: 28px; }
  .pd-hero h1 { font-size: 26px; }
  .pd-nav { grid-template-columns: 1fr; }
  .pd-nav a.next { border-left: none; border-top: 1px solid var(--border); }
}