/* ============================================================
   灵启科技官网 —— 科技蓝主题（Tech Blue）
   ============================================================ */
:root {
  --blue-900: #061a3a;
  --blue-800: #0a2450;
  --blue-700: #0e3a7d;
  --blue-600: #1156b4;
  --blue-500: #1877f0;
  --blue-400: #3d9bff;
  --blue-300: #7cc0ff;
  --blue-100: #e3f0ff;
  --blue-50:  #f3f8ff;
  --cyan:     #00d4ff;
  --ink:      #16233c;
  --ink-2:    #48566f;
  --ink-3:    #7b8aa5;
  --line:     #e2e9f4;
  --bg:       #f7faff;
  --white:    #fff;
  --gold:     #ff9d2e;
  --red:      #ff5a5a;
  --grad:     linear-gradient(135deg, #1877f0 0%, #00b3ff 100%);
  --grad-deep: linear-gradient(160deg, #081f49 0%, #0d3a86 100%);
  --shadow:   0 12px 40px rgba(14, 58, 125, .12);
  --shadow-sm:0 4px 16px rgba(14, 58, 125, .08);
  --radius:   14px;
  --wrap:     1200px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink); background: var(--bg); line-height: 1.7; font-size: 15px;
}
img { max-width: 100%; display: block; }
a { color: var(--blue-600); text-decoration: none; transition: .25s; }
a:hover { color: var(--blue-500); }
ul, ol { list-style: none; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.ico { flex: none; vertical-align: -4px; }
.rich p { margin: 0 0 12px; }
.rich :last-child { margin-bottom: 0; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 10px; top: 10px; z-index: 999; background: #fff; padding: 8px 14px; border-radius: 6px; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 12px 30px; border-radius: 40px; font-size: 15px; font-weight: 600; cursor: pointer; border: 1.5px solid transparent; transition: .25s; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 24px rgba(24, 119, 240, .35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(24, 119, 240, .45); color: #fff; }
.btn-ghost { border-color: var(--blue-500); color: var(--blue-600); background: rgba(255,255,255,.6); }
.btn-ghost:hover { background: var(--blue-100); color: var(--blue-700); }
.btn-light { background: #fff; color: var(--blue-700); font-weight: 700; }
.btn-light:hover { transform: translateY(-2px); color: var(--blue-500); }
.btn-block { width: 100%; }

/* ---------- 头部 ---------- */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); box-shadow: 0 2px 20px rgba(10, 36, 80, .06); }
.header-inner { display: flex; align-items: center; height: 68px; gap: 28px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 21px; color: var(--blue-800); }
.logo-mark { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 11px; background: var(--grad); color: #fff; box-shadow: 0 6px 16px rgba(24,119,240,.35); }
.nav { display: flex; gap: 6px; margin-left: auto; }
.nav li a { display: block; padding: 8px 18px; border-radius: 24px; color: var(--ink-2); font-weight: 600; font-size: 15px; }
.nav li a:hover, .nav li a.active { color: var(--blue-600); background: var(--blue-50); }
.header-cta { padding: 9px 22px; border-radius: 30px; background: var(--grad); color: #fff; font-weight: 600; font-size: 14px; box-shadow: 0 6px 16px rgba(24,119,240,.3); }
.header-cta:hover { color: #fff; transform: translateY(-1px); }
.nav-toggle { display: none; }

/* ---------- 首页 Hero ---------- */
.hero { position: relative; overflow: hidden; background: var(--grad-deep); color: #fff; padding: 90px 0 110px; }
.hero-bg { position: absolute; inset: 0; opacity: .22; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero::after { content: ""; position: absolute; inset: 0; background: radial-gradient(800px 300px at 20% 110%, rgba(0,212,255,.25), transparent), radial-gradient(600px 240px at 85% 0%, rgba(24,119,240,.4), transparent); }
.hero-inner { position: relative; z-index: 2; text-align: center; }
.hero h1 { font-size: 44px; font-weight: 800; letter-spacing: 2px; margin-bottom: 18px; text-shadow: 0 4px 24px rgba(0,0,0,.25); }
.hero p { font-size: 17px; color: #bfe0ff; max-width: 760px; margin: 0 auto 32px; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 16:9 视频横幅 ---------- */
.banner-sec { background: var(--bg); padding: 34px 0 6px; }
.banner { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); background: var(--blue-900); }
.banner-media { position: relative; padding-top: 56.25%; }
.banner-media video, .banner-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; background: var(--blue-900); }
.page-banner { margin-bottom: 0; }

/* ---------- 统计条 ---------- */
.stats-bar { background: linear-gradient(180deg, transparent, var(--bg) 60%); padding: 26px 0 10px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); text-align: center; padding: 20px 10px; box-shadow: var(--shadow-sm); }
.stat b { display: block; font-size: 30px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: var(--ink-3); font-size: 14px; }

/* ---------- 通用板块 ---------- */
.sec { padding: 68px 0; }
.sec-gray { background: #fff; }
.sec-dark { background: var(--grad-deep); color: #fff; }
.sec-dark .sec-sub { color: var(--blue-300); }
.sec-dark .sec-title { color: #fff; }
.sec-dark .sec-line { background: var(--cyan); }
.sec-head { text-align: center; margin-bottom: 44px; position: relative; }
.sec-sub { display: block; font-size: 12px; letter-spacing: 4px; color: var(--blue-400); font-weight: 700; text-transform: uppercase; margin-bottom: 6px; }
.sec-title { font-size: 32px; font-weight: 800; color: var(--blue-900); }
.sec-note { color: var(--ink-3); margin-top: 10px; font-size: 14px; }
.sec-line { display: block; width: 56px; height: 4px; border-radius: 4px; background: var(--grad); margin: 16px auto 0; }
.empty-tip { text-align: center; color: var(--ink-3); padding: 40px 0; }

/* ---------- 公司简介 ---------- */
.intro-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 52px; align-items: center; }
.intro-media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); position: relative; }
.intro-media img { aspect-ratio: 4/3; object-fit: cover; transition: transform .5s; }
.intro-media:hover img { transform: scale(1.04); }
.intro-media::before { content: ""; position: absolute; inset: 0; border: 1px solid rgba(255,255,255,.4); border-radius: var(--radius); transform: translate(14px, 14px); z-index: -1; }
.sec-head.left { text-align: left; }
.intro-text .sec-line { margin-left: 0; }
.intro-text .rich { color: var(--ink-2); }

/* ---------- 业务布局 ---------- */
.biz-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.biz-card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 24px; transition: .3s; position: relative; overflow: hidden; color: var(--ink); display: block; }
.biz-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--grad); transform: scaleX(0); transform-origin: left; transition: .35s; }
.biz-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); background: #fff; color: var(--ink); }
.biz-card:hover::before { transform: scaleX(1); }
.biz-ico { display: grid; place-items: center; width: 58px; height: 58px; border-radius: 16px; background: var(--blue-100); color: var(--blue-600); margin-bottom: 18px; }
.biz-card h3 { font-size: 18px; margin-bottom: 10px; color: var(--blue-900); }
.biz-card p { color: var(--ink-3); font-size: 13.5px; margin-bottom: 14px; }
.biz-more { color: var(--blue-500); font-size: 13px; font-weight: 600; }

/* ---------- 服务客户 ---------- */
.client-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.client-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 20px; text-align: center; transition: .3s; }
.client-card:hover { box-shadow: var(--shadow); border-color: var(--blue-300); transform: translateY(-4px); }
.client-ico { display: grid; place-items: center; width: 52px; height: 52px; margin: 0 auto 14px; border-radius: 50%; background: var(--blue-50); color: var(--blue-500); }
.client-card h4 { font-size: 15.5px; color: var(--blue-900); margin-bottom: 4px; }
.client-card p { font-size: 13px; color: var(--ink-3); }

/* ---------- 发展历程 ---------- */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 26px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(180deg, var(--blue-400), rgba(0,212,255,.15)); }
.tl-item { position: relative; padding: 0 0 34px 30px; }
.tl-dot { position: absolute; left: -26px; top: 7px; width: 16px; height: 16px; border-radius: 50%; background: var(--grad); box-shadow: 0 0 0 5px rgba(24,119,240,.25); }
.tl-year { font-size: 26px; font-weight: 800; color: var(--cyan); margin-bottom: 6px; font-style: italic; }
.tl-body { background: rgba(255,255,255,.08); border: 1px solid rgba(124,192,255,.25); border-radius: 12px; padding: 16px 20px; }
.tl-body h4 { font-size: 16px; margin-bottom: 4px; color: #fff; }
.tl-body p { color: #a9c6ee; font-size: 13.5px; }

/* ---------- 合作地图 ---------- */
.map-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); }
#chinaMap { width: 100%; height: 560px; }
.map-legend { display: flex; justify-content: center; gap: 28px; margin-top: 8px; color: var(--ink-3); font-size: 13px; }
.map-legend .lg { display: inline-block; width: 14px; height: 14px; border-radius: 4px; margin-right: 6px; vertical-align: -2px; }
.lg-deep { background: #0d3a86; }
.lg-normal { background: #7cc0ff; }

/* ---------- 荣誉墙 ---------- */
.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.honor-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: .3s; }
.honor-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.honor-card img { aspect-ratio: 4/3; object-fit: cover; }
.honor-ph { aspect-ratio: 4/3; display: grid; place-items: center; background: linear-gradient(160deg, var(--blue-50), var(--blue-100)); color: var(--blue-500); }
.honor-card figcaption { padding: 14px 16px 16px; }
.honor-card b { display: inline-block; font-size: 11px; font-weight: 700; color: var(--blue-600); background: var(--blue-50); border: 1px solid var(--blue-100); padding: 1px 10px; border-radius: 20px; margin-bottom: 8px; }
.honor-card span { display: block; font-size: 14.5px; font-weight: 600; color: var(--ink); margin-bottom: 4px; }
.honor-card small { color: var(--ink-3); font-size: 12.5px; }

/* ---------- CTA 横带 ---------- */
.cta-band { background: var(--grad); color: #fff; text-align: center; padding: 64px 20px; }
.cta-band h2 { font-size: 30px; margin-bottom: 12px; }
.cta-band p { color: #d9ecff; margin-bottom: 28px; }

/* ---------- 页面 Hero ---------- */
.page-hero { background: var(--grad-deep); color: #fff; padding: 58px 0 66px; position: relative; overflow: hidden; }
.page-hero::after { content: ""; position: absolute; inset: 0; background: radial-gradient(500px 200px at 80% 10%, rgba(0,212,255,.2), transparent), radial-gradient(400px 200px at 10% 100%, rgba(24,119,240,.35), transparent); }
.page-hero .wrap { position: relative; z-index: 2; }
.crumbs { display: inline-block; font-size: 13px; color: #9fc4f5; margin-bottom: 14px; }
.crumbs a { color: #9fc4f5; }
.crumbs a:hover { color: #fff; }
.page-hero h1 { font-size: 36px; font-weight: 800; letter-spacing: 1px; }
.page-hero p { color: #b7d5ff; margin-top: 10px; }

/* ---------- 板块页 ---------- */
.cat-intro { max-width: 880px; margin: 0 auto 40px; text-align: center; color: var(--ink-2); }
.prod-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.prod-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: .3s; color: var(--ink); display: block; }
.prod-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); color: var(--ink); }
.prod-cover { position: relative; }
.prod-cover img { aspect-ratio: 16/9; object-fit: cover; }
.prod-tag { position: absolute; left: 14px; bottom: 14px; background: rgba(8, 31, 73, .78); backdrop-filter: blur(4px); color: #fff; font-size: 13px; padding: 5px 14px; border-radius: 24px; }
.prod-body { padding: 24px 26px 26px; }
.prod-body h3 { font-size: 20px; color: var(--blue-900); margin-bottom: 8px; }
.prod-body p { color: var(--ink-3); font-size: 14px; margin-bottom: 16px; }
.prod-more { color: var(--blue-500); font-size: 13.5px; font-weight: 600; }

/* ---------- 产品页 ---------- */
.prod-top { display: grid; grid-template-columns: 1.1fr 1fr; gap: 46px; align-items: center; }
.prod-top-cover { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.prod-top-cover img { aspect-ratio: 3/2; object-fit: cover; }
.prod-top-info h2 { font-size: 30px; color: var(--blue-900); margin-bottom: 8px; }
.prod-tagline { color: var(--blue-500); font-weight: 600; margin-bottom: 18px; font-size: 16px; }
.prod-cta { display: flex; gap: 14px; margin-top: 24px; }
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feat-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px; transition: .3s; }
.feat-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: var(--blue-300); }
.feat-ico { display: grid; place-items: center; width: 50px; height: 50px; border-radius: 14px; background: var(--blue-100); color: var(--blue-600); margin-bottom: 14px; }
.feat-card h4 { font-size: 16.5px; margin-bottom: 8px; color: var(--blue-900); }
.feat-card p { color: var(--ink-3); font-size: 13.5px; }
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.scene-card { background: var(--blue-50); border: 1px solid var(--blue-100); border-radius: var(--radius); padding: 24px; }
.scene-card h4 { color: var(--blue-700); font-size: 16px; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.scene-card p { color: var(--ink-3); font-size: 13.5px; }

/* ---------- 套餐 ---------- */
.pkg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.pkg { background: #fff; border: 1.5px solid var(--line); border-radius: var(--radius); padding: 32px 26px; position: relative; display: flex; flex-direction: column; transition: .3s; }
.pkg:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.pkg.hot { border-color: var(--blue-500); box-shadow: 0 16px 44px rgba(24,119,240,.22); }
.pkg-badge { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--grad); color: #fff; font-size: 12px; font-weight: 700; padding: 4px 18px; border-radius: 20px; }
.pkg h4 { text-align: center; font-size: 18px; color: var(--blue-900); }
.pkg-price { text-align: center; margin: 14px 0 2px; color: var(--blue-600); }
.pkg-price em { font-style: normal; font-size: 15px; margin-right: 2px; }
.pkg-price b { font-size: 36px; font-weight: 800; }
.pkg-price span { font-size: 13px; color: var(--ink-3); margin-left: 4px; }
.pkg del { display: block; text-align: center; color: var(--ink-3); font-size: 12.5px; }
.pkg-note { text-align: center; color: var(--ink-3); font-size: 12.5px; margin: 6px 0 14px; }
.pkg ul { border-top: 1px dashed var(--line); padding-top: 16px; margin-bottom: 22px; flex: 1; }
.pkg li { display: flex; gap: 8px; align-items: flex-start; color: var(--ink-2); font-size: 13.5px; padding: 5px 0; }
.pkg li .ico { color: var(--blue-500); margin-top: 3px; }
.pkg-btn { margin-top: auto; }

/* ---------- 演示账号 ---------- */
.demo-box { margin-top: 40px; background: var(--grad-deep); border-radius: var(--radius); padding: 30px 34px; color: #fff; display: flex; flex-wrap: wrap; gap: 28px; align-items: center; }
.demo-head { display: flex; align-items: center; gap: 14px; }
.demo-head .ico { color: var(--cyan); }
.demo-head h3 { font-size: 19px; }
.demo-head p { color: #a9c6ee; font-size: 13px; }
.demo-info { display: flex; gap: 34px; flex-wrap: wrap; }
.demo-info dt { font-size: 12px; color: #9fc4f5; margin-bottom: 4px; }
.demo-info dd code { background: rgba(255,255,255,.12); border: 1px solid rgba(124,192,255,.35); padding: 6px 16px; border-radius: 8px; font-family: "JetBrains Mono", Consolas, monospace; font-size: 14px; color: #fff; letter-spacing: 1px; }
.demo-info a { color: var(--cyan); word-break: break-all; }

/* ---------- 下载中心 ---------- */
.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.dl-card { display: flex; align-items: center; gap: 18px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; transition: .3s; }
.dl-card:hover { box-shadow: var(--shadow); border-color: var(--blue-300); }
.dl-ico { display: grid; place-items: center; width: 54px; height: 54px; border-radius: 14px; background: var(--blue-100); color: var(--blue-600); }
.dl-info { flex: 1; }
.dl-info h4 { font-size: 15.5px; color: var(--blue-900); }
.dl-info p { display: flex; flex-wrap: wrap; gap: 14px; color: var(--ink-3); font-size: 12.5px; margin: 4px 0; }
.dl-info small { color: var(--ink-3); font-size: 12px; }

/* ---------- 相关产品 ---------- */
.rel-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.rel-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; text-align: center; color: var(--ink); transition: .3s; }
.rel-item:hover { box-shadow: var(--shadow-sm); transform: translateY(-4px); color: var(--ink); }
.rel-item img { aspect-ratio: 16/10; object-fit: cover; }
.rel-item span { display: block; padding: 12px; font-weight: 600; color: var(--blue-900); font-size: 14px; }

/* ---------- 资讯 ---------- */
.news-tabs { display: flex; gap: 12px; margin-bottom: 30px; flex-wrap: wrap; }
.news-tabs a { padding: 9px 26px; border-radius: 30px; background: #fff; border: 1px solid var(--line); color: var(--ink-2); font-weight: 600; font-size: 14px; }
.news-tabs a.active, .news-tabs a:hover { background: var(--grad); color: #fff; border-color: transparent; }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: .3s; color: var(--ink); display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); color: var(--ink); }
.news-cover { position: relative; }
.news-cover img { aspect-ratio: 16/9; object-fit: cover; }
.news-cat { position: absolute; top: 12px; left: 12px; background: var(--grad); color: #fff; font-size: 12px; padding: 3px 12px; border-radius: 20px; }
.news-cat.intl { background: linear-gradient(135deg, #ff9d2e, #ff5a5a); }
.news-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.news-body time { color: var(--ink-3); font-size: 12.5px; }
.news-body h3 { font-size: 16.5px; margin: 8px 0; color: var(--blue-900); line-height: 1.5; }
.news-body p { color: var(--ink-3); font-size: 13.5px; flex: 1; }
.news-more { color: var(--blue-500); font-size: 13px; font-weight: 600; margin-top: 12px; }
.news-detail-grid { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
.news-article { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 34px 38px; }
.news-meta { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; color: var(--ink-3); font-size: 13px; padding-bottom: 18px; border-bottom: 1px solid var(--line); margin-bottom: 22px; }
.news-article .rich { color: var(--ink-2); font-size: 15.5px; }
.news-kw { margin-top: 26px; padding-top: 18px; border-top: 1px dashed var(--line); color: var(--ink-3); font-size: 13px; }
.news-side { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; position: sticky; top: 90px; }
.news-side h3 { font-size: 17px; color: var(--blue-900); margin-bottom: 16px; }
.side-news { display: block; padding: 12px 0; border-bottom: 1px dashed var(--line); }
.side-news:last-child { border-bottom: none; }
.side-cat { font-size: 11px; color: var(--blue-500); }
.side-news h4 { font-size: 14px; color: var(--ink); line-height: 1.5; margin: 4px 0; }
.side-news:hover h4 { color: var(--blue-600); }
.side-news time { font-size: 12px; color: var(--ink-3); }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 40px; align-items: start; }
.contact-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.c-card { display: flex; gap: 16px; align-items: flex-start; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; transition: .3s; }
.c-card:hover { box-shadow: var(--shadow-sm); border-color: var(--blue-300); }
.c-card .ico { color: var(--blue-500); background: var(--blue-50); border-radius: 12px; padding: 11px; }
.c-card h4 { font-size: 14px; color: var(--ink-3); margin-bottom: 4px; }
.c-card p { font-size: 15px; color: var(--ink); font-weight: 600; }
.contact-qr { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; text-align: center; box-shadow: var(--shadow-sm); position: sticky; top: 90px; }
.contact-qr img { margin: 0 auto 16px; width: 200px; height: 200px; border-radius: 12px; border: 1px solid var(--line); }
.contact-qr p { color: var(--ink-3); font-size: 13px; margin-bottom: 20px; }
.qr-placeholder { display: grid; place-items: center; width: 200px; height: 200px; margin: 0 auto 16px; border: 2px dashed var(--blue-300); border-radius: 12px; background: var(--blue-50); color: var(--blue-600); font-weight: 700; }
.qr-placeholder span { font-size: 16px; }
.qr-placeholder small { font-size: 11px; color: var(--ink-3); font-weight: 400; }
.qr-placeholder.big { width: 200px; height: 200px; }

/* ---------- 留言板 ---------- */
.msg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
.msg-form-box, .msg-list-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 32px; box-shadow: var(--shadow-sm); }
.msg-form-box h2, .msg-list-box h2 { display: flex; align-items: center; gap: 10px; font-size: 19px; color: var(--blue-900); margin-bottom: 20px; }
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 13.5px; color: var(--ink-2); margin-bottom: 6px; font-weight: 600; }
.form-row label i { color: var(--red); font-style: normal; }
.form-row input, .form-row textarea { width: 100%; padding: 11px 14px; border: 1.5px solid var(--line); border-radius: 10px; font-size: 14px; font-family: inherit; transition: .2s; background: var(--bg); }
.form-row input:focus, .form-row textarea:focus { outline: none; border-color: var(--blue-500); background: #fff; box-shadow: 0 0 0 3px rgba(24,119,240,.12); }
.cap-line { display: flex; align-items: center; gap: 12px; }
.cap-q { background: linear-gradient(135deg, #e8f2ff, #d6e8ff); color: var(--blue-800); font-weight: 800; padding: 8px 16px; border-radius: 8px; letter-spacing: 2px; font-size: 15px; user-select: none; }
.cap-line input { max-width: 140px; }
.form-tip { margin-top: 12px; font-size: 13.5px; text-align: center; min-height: 20px; color: var(--ink-3); }
.form-tip.ok { color: #1fa658; }
.form-tip.err { color: var(--red); }
.msg-list { max-height: 640px; overflow-y: auto; }
.msg-item { padding: 16px 0; border-bottom: 1px dashed var(--line); }
.msg-item:last-child { border-bottom: none; }
.msg-head { display: flex; justify-content: space-between; margin-bottom: 6px; }
.msg-head b { color: var(--blue-700); }
.msg-head time { color: var(--ink-3); font-size: 12px; }
.msg-item p { color: var(--ink-2); font-size: 14px; }
.msg-reply { margin-top: 10px; background: var(--blue-50); border-left: 3px solid var(--blue-400); padding: 10px 14px; border-radius: 0 8px 8px 0; font-size: 13.5px; color: var(--ink-2); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--blue-900); color: #b9cbe6; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1.4fr 0.9fr; gap: 36px; padding: 56px 20px 40px; }
.f-logo { display: flex; align-items: center; gap: 8px; color: #fff; font-size: 18px; font-weight: 800; margin-bottom: 14px; }
.f-slogan { color: var(--blue-300); font-size: 14px; margin-bottom: 10px; }
.f-note { font-size: 13px; line-height: 1.8; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 18px; position: relative; padding-bottom: 10px; }
.site-footer h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 26px; height: 3px; border-radius: 3px; background: var(--cyan); }
.f-links { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 16px; }
.f-links a { color: #b9cbe6; font-size: 13.5px; }
.f-links a:hover { color: var(--cyan); }
.f-contact li { display: flex; gap: 8px; align-items: flex-start; font-size: 13.5px; padding: 5px 0; }
.f-contact .ico { color: var(--blue-300); margin-top: 3px; }
.f-contact a { color: #b9cbe6; }
.f-contact a:hover { color: var(--cyan); }
.f-qr img { width: 130px; height: 130px; border-radius: 10px; margin-bottom: 10px; }
.f-qr .qr-placeholder { width: 130px; height: 130px; margin-bottom: 10px; }
.f-qr .qr-placeholder span { font-size: 13px; }
.f-qr-note { font-size: 12px; color: #8fa8cc; }
.footer-bar { border-top: 1px solid rgba(124,192,255,.15); padding: 18px 0; font-size: 12.5px; }
.footer-bar .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.footer-bar a { color: #8fa8cc; }

/* ---------- 悬浮联系 ---------- */
.float-contact { position: fixed; right: 18px; bottom: 90px; z-index: 90; display: flex; flex-direction: column; gap: 10px; }
.fc-btn { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; background: #fff; color: var(--blue-600); box-shadow: var(--shadow); border: 1px solid var(--line); transition: .25s; }
.fc-btn:hover { background: var(--grad); color: #fff; transform: translateY(-3px); }
.fc-top { transform: rotate(-90deg); }
.fc-top:hover { transform: rotate(-90deg) translateY(-3px); }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 产品详情页扩展板块（数据/痛点/流程/证言/FAQ） ---------- */
.prod-stats { padding-top: 8px; }
.pain-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.pain-item { background: rgba(255,255,255,.04); border: 1px solid rgba(124,192,255,.18); border-radius: var(--radius); padding: 24px 26px; transition: .3s; }
.pain-item:hover { border-color: var(--cyan); transform: translateY(-4px); }
.pain-head { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; padding-bottom: 14px; border-bottom: 1px solid rgba(124,192,255,.18); }
.pain-no { display: grid; place-items: center; min-width: 42px; height: 42px; border-radius: 12px; background: var(--grad); color: #fff; font-weight: 800; font-size: 17px; font-style: italic; }
.pain-head h4 { color: #fff; font-size: 17px; }
.pain-compare { display: grid; grid-template-columns: 1fr 32px 1fr; gap: 12px; align-items: center; }
.pain-before, .pain-after { padding: 14px 16px; border-radius: 10px; }
.pain-before { background: rgba(255,90,90,.08); border: 1px solid rgba(255,90,90,.22); }
.pain-after { background: rgba(31,166,88,.1); border: 1px solid rgba(31,166,88,.25); }
.pain-tag { display: inline-block; font-size: 11px; padding: 2px 10px; border-radius: 20px; color: #fff; background: rgba(255,90,90,.35); margin-bottom: 8px; font-weight: 700; }
.pain-tag.ok { background: rgba(31,166,88,.4); }
.pain-before p, .pain-after p { color: #d9ecff; font-size: 13.5px; line-height: 1.6; }
.pain-arrow { color: var(--cyan); display: grid; place-items: center; }

.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; position: relative; }
.flow-step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; position: relative; transition: .3s; margin: 0 8px; }
.flow-step:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: var(--blue-300); }
.flow-no { display: inline-block; font-size: 32px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 10px; font-style: italic; }
.flow-body h4 { font-size: 17px; color: var(--blue-900); margin-bottom: 6px; }
.flow-body p { color: var(--ink-3); font-size: 13.5px; }
.flow-arrow { position: absolute; right: -22px; top: 50%; transform: translateY(-50%); display: grid; place-items: center; width: 36px; height: 36px; background: var(--grad); color: #fff; border-radius: 50%; z-index: 2; box-shadow: 0 8px 20px rgba(24,119,240,.3); }

.testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.testi-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px; transition: .3s; display: flex; flex-direction: column; }
.testi-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: var(--blue-300); }
.testi-stars { margin-bottom: 14px; }
.testi-star { color: var(--gold); font-size: 16px; margin-right: 2px; }
.testi-content { color: var(--ink-2); font-size: 14.5px; line-height: 1.7; flex: 1; margin-bottom: 22px; position: relative; padding-top: 16px; }
.testi-content::before { content: """; position: absolute; top: -10px; left: -4px; font-size: 56px; color: var(--blue-100); font-weight: 800; line-height: 1; font-family: Georgia, serif; }
.testi-from { display: flex; align-items: center; gap: 12px; padding-top: 18px; border-top: 1px dashed var(--line); }
.testi-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--grad); color: #fff; font-weight: 700; display: grid; place-items: center; overflow: hidden; }
.testi-avatar img { width: 100%; height: 100%; object-fit: cover; }
.testi-from b { display: block; color: var(--blue-900); font-size: 14.5px; }
.testi-from span { color: var(--ink-3); font-size: 12.5px; }

.faq-list { max-width: 880px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 12px; transition: .3s; overflow: hidden; }
.faq-item:hover { border-color: var(--blue-300); box-shadow: var(--shadow-sm); }
.faq-item[open] { box-shadow: var(--shadow); border-color: var(--blue-400); }
.faq-item summary { padding: 20px 56px 20px 22px; cursor: pointer; font-weight: 600; color: var(--blue-900); font-size: 15.5px; list-style: none; position: relative; user-select: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-arrow { position: absolute; right: 22px; top: 50%; transform: translateY(-50%); color: var(--blue-500); transition: transform .3s; display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--blue-50); }
.faq-item[open] .faq-arrow { transform: translateY(-50%) rotate(90deg); background: var(--grad); color: #fff; }
.faq-a { padding: 0 22px 22px; color: var(--ink-2); font-size: 14px; line-height: 1.85; white-space: pre-line; border-top: 1px dashed var(--line); padding-top: 16px; margin-top: 0; }

@media (max-width: 1024px) {
  .pain-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .flow-arrow { display: none; }
  .testi-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .pain-compare { grid-template-columns: 1fr; }
  .pain-arrow { transform: rotate(90deg); margin: 4px auto; }
  .flow { grid-template-columns: 1fr; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .biz-grid, .feat-grid, .scene-grid, .honor-grid, .rel-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .client-grid { grid-template-columns: repeat(3, 1fr); }
  .news-detail-grid, .contact-grid, .intro-grid, .prod-top { grid-template-columns: 1fr; }
  .news-side, .contact-qr { position: static; }
}
@media (max-width: 720px) {
  .hero h1 { font-size: 30px; }
  .hero { padding: 60px 0 70px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .biz-grid, .client-grid, .feat-grid, .scene-grid, .honor-grid, .prod-grid, .pkg-grid, .dl-grid, .news-grid, .rel-grid, .contact-cards, .msg-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  #chinaMap { height: 400px; }
  .nav-toggle { display: flex; flex-direction: column; justify-content: center; gap: 5px; width: 42px; height: 42px; background: none; border: none; cursor: pointer; }
  .nav-toggle span { width: 22px; height: 2.5px; background: var(--blue-800); border-radius: 2px; transition: .3s; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }
  .nav { position: fixed; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 12px 20px 20px; gap: 4px; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); display: none; }
  .nav.open { display: flex; }
  .header-cta { display: none; }
  .header-inner { gap: 12px; }
  .logo { margin-right: auto; }
  .news-detail-grid { gap: 24px; }
  .news-article { padding: 24px 20px; }
}