/* ============================================================
   上海私云 - 全局样式（对齐参考站：青蓝科技风）
   配色：主蓝 #007cc2 / 深蓝 #005b8f / 青亮 #00d4ff
   ============================================================ */
:root {
  --primary: #007cc2;
  --primary-dark: #005b8f;
  --primary-light: #4db8e6;
  --accent: #00d4ff;
  --dark: #062338;
  --dark-2: #0a3a5c;
  --text: #1f2d45;
  --text-light: #5a6b87;
  --bg-light: #f1f8fc;
  --white: #ffffff;
  --border: #dde9f2;
  --shadow: 0 10px 30px rgba(0, 124, 194, 0.10);
  --shadow-lg: 0 16px 48px rgba(6, 35, 56, 0.18);
  --radius: 14px;
  --maxw: 1200px;
  --header-h: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
h1, h2, h3, h4 { letter-spacing: -.02em; }

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

/* ---------- 通用 ---------- */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-light); }
.section-dark { background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%); color: #dbe7ff; }

.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .12em;
  color: var(--primary); text-transform: uppercase; margin-bottom: 12px;
}
.section-dark .section-head .eyebrow { color: var(--accent); }
.section-head h2 { font-size: 34px; font-weight: 700; color: var(--dark); line-height: 1.3; }
.section-dark .section-head h2 { color: #fff; }
.section-head p { margin-top: 14px; color: var(--text-light); font-size: 16px; }
.section-dark .section-head p { color: #9fb4d8; }

.btn {
  display: inline-block; padding: 13px 32px; border-radius: 12px;
  font-size: 15px; font-weight: 600; cursor: pointer; border: none;
  transition: all .3s ease; text-align: center; letter-spacing: .01em;
}
.btn-primary { background: linear-gradient(90deg, var(--primary), var(--primary-light)); color: #fff; box-shadow: 0 8px 22px rgba(0,124,194,.32); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0,124,194,.42); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.5); }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }

.tag {
  display: inline-block; padding: 4px 14px; border-radius: 30px; font-size: 12.5px;
  background: rgba(0,124,194,.08); color: var(--primary); font-weight: 500; margin: 4px 6px 0 0;
}

/* ---------- 滚动显现动画 ---------- */
.reveal { opacity: 0; transform: translateY(36px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: .1s; }
.reveal-d2 { transition-delay: .2s; }
.reveal-d3 { transition-delay: .3s; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h);
  transition: background .3s ease, box-shadow .3s ease;
  background: transparent;
}
.site-header.scrolled, .site-header.solid {
  background: rgba(255,255,255,.96); backdrop-filter: blur(12px);
  box-shadow: 0 2px 16px rgba(7,26,62,.08);
}
.header-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; height: var(--header-h); display: flex; align-items: center; justify-content: space-between; }

.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: #fff; transition: color .3s; }
.logo .logo-mark {
  height: 44px; width: auto; flex: none;
  display: flex; align-items: center; justify-content: center;
  background: transparent; padding: 0; border-radius: 0;
}
.logo .logo-mark img { height: 100%; width: auto; object-fit: contain; display: block; }
.logo small { display: block; font-size: 11px; font-weight: 400; opacity: .75; letter-spacing: 1px; line-height: 1.2; }
.site-header.scrolled .logo, .site-header.solid .logo { color: var(--dark); }

.main-nav { display: flex; align-items: center; gap: 4px; flex-wrap: nowrap; list-style: none; }
.main-nav a {
  padding: 8px 14px; font-size: 15px; color: rgba(255,255,255,.88);
  border-radius: 8px; transition: all .25s; position: relative; white-space: nowrap;
}
.site-header.scrolled .main-nav a, .site-header.solid .main-nav a { color: var(--text); }
.main-nav a:hover { color: var(--accent); }
.site-header.scrolled .main-nav a:hover, .site-header.solid .main-nav a:hover { color: var(--primary); background: rgba(0,124,194,.06); }
.main-nav a.active { color: #fff; font-weight: 600; }
.site-header.scrolled .main-nav a.active, .site-header.solid .main-nav a.active { color: var(--primary); }
.main-nav a.active::after {
  content: ""; position: absolute; left: 18px; right: 18px; bottom: 2px; height: 3px;
  border-radius: 3px; background: linear-gradient(90deg, var(--primary), var(--accent));
}
.nav-cta { margin-left: 14px; padding: 9px 24px !important; border-radius: 12px !important;
  background: linear-gradient(90deg, var(--primary), var(--primary-light)); color: #fff !important; font-weight: 600; }
.nav-cta::after { display: none !important; }
.nav-cta:hover { opacity: .9; }

/* ---------- 下拉子菜单 ---------- */
.main-nav .has-dropdown { position: relative; display: flex; align-items: center; }
.main-nav .has-dropdown > a { display: inline-flex; align-items: center; gap: 6px; }
.main-nav .caret { width: 0; height: 0; border-left: 4px solid transparent; border-right: 4px solid transparent; border-top: 5px solid currentColor; opacity: .85; transition: transform .25s; margin-left: 1px; }
.main-nav .has-dropdown:hover > a .caret { transform: rotate(180deg); }

.main-nav .dropdown {
  position: absolute; top: calc(100% + 6px); left: 0; min-width: 188px;
  background: #fff; border: 1px solid var(--border);
  border-radius: 14px; box-shadow: 0 18px 40px rgba(7,26,62,.16);
  padding: 10px; display: flex; flex-direction: column; gap: 2px;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .22s ease, transform .22s ease, visibility .22s;
  z-index: 1100;
}
.main-nav .has-dropdown:hover > .dropdown,
.main-nav .has-dropdown.open > .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.main-nav .dropdown a {
  display: block; padding: 11px 14px; font-size: 14.5px; color: var(--text);
  border-radius: 9px; white-space: nowrap;
}
.main-nav .dropdown a:hover { background: rgba(0,124,194,.08); color: var(--primary); }

/* ---------- 移动端导航 ---------- */

.nav-toggle { display: none; width: 42px; height: 42px; background: none; border: none; cursor: pointer; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.nav-toggle span { width: 24px; height: 2.5px; border-radius: 2px; background: #fff; transition: all .3s; }
.site-header.scrolled .nav-toggle span, .site-header.solid .nav-toggle span { background: var(--dark); }
.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); }

/* ---------- Hero 轮播 ---------- */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  background: linear-gradient(135deg, #052a4a 0%, #006b9e 55%, #007cc2 120%);
  overflow: hidden; color: #fff;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(0,212,255,.16), transparent),
    radial-gradient(ellipse 50% 60% at 15% 85%, rgba(0,124,194,.28), transparent);
}
#hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-inner { position: relative; z-index: 2; max-width: var(--maxw); margin: 0 auto; padding: 120px 24px 80px; width: 100%; }

.hero-slides { position: relative; min-height: 340px; }
.hero-slide { position: absolute; inset: 0; opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s ease; pointer-events: none; }
.hero-slide.active { opacity: 1; transform: translateY(0); pointer-events: auto; position: relative; }
.hero-slide .kicker {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; border-radius: 40px;
  background: rgba(0,212,255,.12); border: 1px solid rgba(0,212,255,.35);
  color: var(--accent); font-size: 13.5px; margin-bottom: 22px;
}
.hero-slide h1 { font-size: 48px; line-height: 1.25; font-weight: 800; max-width: 720px; }
.hero-slide h1 em { font-style: normal; background: linear-gradient(90deg, var(--accent), var(--primary-light)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-slide p { margin: 20px 0 34px; font-size: 17.5px; color: #b8c9e8; max-width: 640px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-dots { display: flex; gap: 10px; margin-top: 56px; }
.hero-dots button { width: 34px; height: 4px; border-radius: 4px; border: none; background: rgba(255,255,255,.25); cursor: pointer; transition: all .3s; }
.hero-dots button.active { background: var(--accent); width: 52px; }

.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px; padding-top: 40px; border-top: 1px solid rgba(255,255,255,.12); }
.hero-stats .stat b { font-size: 34px; font-weight: 800; color: #fff; }
.hero-stats .stat b span.unit { font-size: 18px; color: var(--accent); margin-left: 2px; }
.hero-stats .stat i { display: block; font-style: normal; font-size: 14px; color: #93a8cf; margin-top: 4px; }

/* ---------- 页面头（内页 Banner） ---------- */
.page-hero {
  position: relative; padding: 170px 0 90px; color: #fff; text-align: center;
  background: linear-gradient(135deg, #052a4a 0%, #006b9e 60%, #007cc2 140%);
  overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 55% 60% at 75% 30%, rgba(0,212,255,.16), transparent);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: 40px; font-weight: 800; }
.page-hero p { margin-top: 14px; color: #aec2e8; font-size: 16.5px; max-width: 680px; margin-left: auto; margin-right: auto; }
.breadcrumb { margin-top: 20px; font-size: 13.5px; color: #7f97c4; }
.breadcrumb a:hover { color: var(--accent); }

/* ---------- 卡片 ---------- */
.grid { display: grid; gap: 26px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 34px 28px; transition: transform .35s ease, box-shadow .35s ease, border-color .35s;
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: rgba(0,124,194,.3); }
.card .icon {
  width: 58px; height: 58px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(0,124,194,.12), rgba(0,212,255,.12));
}
.card h3 { font-size: 19px; color: var(--dark); margin-bottom: 10px; font-weight: 700; }
.card p { font-size: 14.5px; color: var(--text-light); }
.card .card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 18px; color: var(--primary); font-size: 14px; font-weight: 600; }
.card .card-link:hover { gap: 10px; }
.card .card-link::after { content: "→"; transition: transform .3s; }

/* 业务概览大卡 */
.biz-card {
  position: relative; border-radius: var(--radius); overflow: hidden; padding: 40px 32px;
  background: #fff; border: 1px solid var(--border);
  transition: all .35s ease;
}
.biz-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0); transform-origin: left; transition: transform .4s ease;
}
.biz-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.biz-card:hover::before { transform: scaleX(1); }
.biz-card .num { font-size: 42px; font-weight: 800; color: rgba(0,124,194,.14); font-family: Arial; line-height: 1; }
.biz-card h3 { font-size: 21px; color: var(--dark); margin: 12px 0 10px; }
.biz-card p { color: var(--text-light); font-size: 14.5px; }
.biz-card ul { margin-top: 16px; }
.biz-card ul li { font-size: 14px; color: var(--text); padding: 5px 0 5px 24px; position: relative; }
.biz-card ul li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 700; }

/* ---------- 优势区 ---------- */
.adv-item { display: flex; gap: 20px; align-items: flex-start; }
.adv-item .adv-icon {
  flex: none; width: 54px; height: 54px; border-radius: 12px; font-size: 24px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff;
  box-shadow: 0 8px 20px rgba(0,124,194,.3);
}
.adv-item h3 { font-size: 18px; color: var(--dark); margin-bottom: 6px; }
.section-dark .adv-item h3 { color: #fff; }
.adv-item p { font-size: 14.5px; color: var(--text-light); }
.section-dark .adv-item p { color: #9fb4d8; }

/* ---------- 数字滚动 ---------- */
.counter-band { background: linear-gradient(90deg, var(--primary-dark), var(--primary)); color: #fff; padding: 56px 0; }
.counter-band .grid-4 { text-align: center; }
.counter-band b { font-size: 42px; font-weight: 800; font-family: Arial; }
.counter-band .unit { font-size: 20px; margin-left: 2px; }
.counter-band i { display: block; font-style: normal; margin-top: 6px; font-size: 14.5px; opacity: .85; }

/* ---------- 客户/资质 logo 墙 ---------- */
.logo-wall { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.logo-wall .logo-item {
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  padding: 26px 18px; text-align: center; transition: all .3s;
}
.logo-wall .logo-item:hover { border-color: var(--primary); box-shadow: var(--shadow); transform: translateY(-4px); }
.logo-wall .logo-item .cert-icon { font-size: 30px; margin-bottom: 10px; }
.logo-wall .logo-item b { display: block; font-size: 15px; color: var(--dark); }
.logo-wall .logo-item span { font-size: 12.5px; color: var(--text-light); }

/* ---------- 行业客户 ---------- */
.industry-strip { display: grid; grid-template-columns: repeat(7, 1fr); gap: 14px; }
.industry-strip .ind {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px; padding: 22px 10px; text-align: center; transition: all .3s;
}
.industry-strip .ind:hover { background: rgba(0,212,255,.1); border-color: var(--accent); transform: translateY(-4px); }
.industry-strip .ind .ind-icon { width: 50px; height: 50px; margin: 0 auto; display: flex; align-items: center; justify-content: center; color: var(--accent); transition: transform .3s, color .3s; }
.industry-strip .ind .ind-icon svg { width: 50px; height: 50px; stroke-width: 1.5; }
.industry-strip .ind:hover .ind-icon { transform: scale(1.12); color: #fff; }
.industry-strip .ind b { display: block; margin-top: 12px; font-size: 15px; color: #fff; font-weight: 600; }

/* ---------- 案例卡 ---------- */
.case-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); transition: all .35s; display: flex; flex-direction: column;
}
.case-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.case-card .case-top { padding: 28px 26px 0; }
.case-card .case-industry { display: inline-block; padding: 4px 14px; border-radius: 30px; font-size: 12.5px; font-weight: 600; background: rgba(0,124,194,.08); color: var(--primary); }
.case-card h3 { font-size: 18.5px; color: var(--dark); margin: 14px 0 8px; }
.case-card .case-body { padding: 0 26px 26px; flex: 1; }
.case-card p { font-size: 14px; color: var(--text-light); }
.case-card .case-metric { border-top: 1px dashed var(--border); padding: 16px 26px; display: flex; gap: 26px; }
.case-card .case-metric b { font-size: 22px; color: var(--primary); font-family: Arial; }
.case-card .case-metric i { display: block; font-style: normal; font-size: 12.5px; color: var(--text-light); }

/* ---------- CTA 区 ---------- */
.cta-band {
  position: relative; padding: 80px 0; text-align: center; color: #fff; overflow: hidden;
  background: linear-gradient(120deg, var(--dark) 0%, var(--primary-dark) 60%, var(--primary) 110%);
}
.cta-band h2 { font-size: 32px; font-weight: 800; }
.cta-band p { margin: 14px auto 30px; color: #b8c9e8; max-width: 560px; }

/* ---------- 产品页 ---------- */
.tabs { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 50px; }
.tabs button {
  padding: 11px 26px; border-radius: 50px; border: 1.5px solid var(--border); background: #fff;
  font-size: 15px; color: var(--text); cursor: pointer; transition: all .3s; font-weight: 500;
}
.tabs button:hover { border-color: var(--primary); color: var(--primary); }
.tabs button.active { background: linear-gradient(90deg, var(--primary), var(--primary-light)); color: #fff; border-color: transparent; box-shadow: 0 6px 18px rgba(0,124,194,.3); }
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp .5s ease; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

.product-hero-card {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center;
  background: linear-gradient(135deg, var(--dark), var(--dark-2)); color: #fff;
  border-radius: var(--radius); padding: 48px; margin-bottom: 30px;
}
.product-hero-card h3 { font-size: 26px; margin-bottom: 14px; }
.product-hero-card h3 small { display: block; font-size: 13px; color: var(--accent); letter-spacing: 2px; margin-bottom: 8px; font-weight: 500; }
.product-hero-card p { color: #a9bde2; font-size: 15px; }
.product-hero-card .ph-visual {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12); border-radius: 12px;
  padding: 26px;
}
.product-hero-card .ph-visual .row { display: flex; justify-content: space-between; padding: 11px 4px; border-bottom: 1px dashed rgba(255,255,255,.12); font-size: 14px; }
.product-hero-card .ph-visual .row:last-child { border-bottom: none; }
.product-hero-card .ph-visual .row b { color: var(--accent); font-weight: 600; }

.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.feature-list .feat {
  background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 22px;
  display: flex; gap: 14px; transition: all .3s;
}
.feature-list .feat:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.feature-list .feat .fi { flex: none; width: 40px; height: 40px; border-radius: 10px; background: rgba(0,124,194,.1); display: flex; align-items: center; justify-content: center; font-size: 19px; }
.feature-list .feat b { display: block; font-size: 15.5px; color: var(--dark); margin-bottom: 4px; }
.feature-list .feat span { font-size: 13.5px; color: var(--text-light); }

.scene-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.scene-chips .chip {
  padding: 9px 20px; border-radius: 40px; background: var(--bg-light);
  border: 1px solid var(--border); font-size: 14px; color: var(--text); transition: all .3s;
}
.scene-chips .chip:hover { background: rgba(0,124,194,.08); border-color: var(--primary); color: var(--primary); }

.sub-block { margin-top: 46px; }
.sub-block > h4 { font-size: 20px; color: var(--dark); margin-bottom: 22px; padding-left: 14px; border-left: 4px solid var(--primary); line-height: 1.4; }

/* ---------- 解决方案页 ---------- */
.solution-block { display: grid; grid-template-columns: 1fr 1fr; gap: 46px; align-items: center; }
.solution-block.rev .sol-text { order: 2; }
.solution-block.rev .sol-visual { order: 1; }
.sol-text h3 { font-size: 26px; color: var(--dark); margin-bottom: 8px; }
.sol-text .sol-sub { color: var(--primary); font-size: 14px; font-weight: 600; letter-spacing: 1px; margin-bottom: 16px; }
.sol-text p { color: var(--text-light); font-size: 15px; margin-bottom: 18px; }
.sol-points li { padding: 9px 0 9px 30px; position: relative; font-size: 14.5px; border-bottom: 1px dashed var(--border); }
.sol-points li:last-child { border-bottom: none; }
.sol-points li::before {
  content: ""; position: absolute; left: 4px; top: 16px; width: 9px; height: 9px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}
.sol-points li b { color: var(--dark); }

.sol-visual {
  background: linear-gradient(135deg, var(--dark), var(--dark-2)); border-radius: var(--radius);
  padding: 34px; color: #fff; box-shadow: var(--shadow-lg);
}
.sol-visual .sv-title { font-size: 13px; letter-spacing: 2px; color: var(--accent); text-align: center; margin-bottom: 20px; }
.arch-layer {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14); border-radius: 10px;
  padding: 13px 18px; margin-bottom: 12px; font-size: 14px; display: flex; justify-content: space-between; align-items: center;
  transition: all .3s;
}
.arch-layer:hover { background: rgba(0,212,255,.12); border-color: var(--accent); transform: translateX(6px); }
.arch-layer b { font-weight: 600; }
.arch-layer span { font-size: 12px; color: #8fa7d4; }
.arch-arrow { text-align: center; color: var(--accent); font-size: 15px; margin: 2px 0 12px; opacity: .7; }

/* ---------- 关于我们 - 时间轴 ---------- */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding: 20px 0; }
.timeline::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--accent)); transform: translateX(-50%);
}
.tl-item { position: relative; width: 50%; padding: 0 44px 44px; }
.tl-item:nth-child(odd) { left: 0; text-align: right; }
.tl-item:nth-child(even) { left: 50%; text-align: left; }
.tl-item::before {
  content: ""; position: absolute; top: 6px; width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 3.5px solid var(--primary); z-index: 2; box-shadow: 0 0 0 5px rgba(0,124,194,.15);
}
.tl-item:nth-child(odd)::before { right: -8px; }
.tl-item:nth-child(even)::before { left: -8px; }
.tl-item .tl-year { font-size: 22px; font-weight: 800; color: var(--primary); font-family: Arial; }
.tl-item .tl-card {
  margin-top: 8px; background: #fff; border: 1px solid var(--border); border-radius: 12px;
  padding: 18px 20px; box-shadow: var(--shadow); font-size: 14px; color: var(--text-light);
  transition: all .3s;
}
.tl-item .tl-card:hover { border-color: var(--primary); transform: translateY(-3px); }
.tl-item .tl-card b { color: var(--dark); display: block; margin-bottom: 4px; font-size: 15px; }

/* ---------- 团队 / 文化 ---------- */
.culture-card { text-align: center; padding: 40px 26px; }
.culture-card .icon { margin: 0 auto 20px; }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: start; }
.contact-info-card {
  background: linear-gradient(135deg, var(--dark), var(--dark-2)); color: #fff;
  border-radius: var(--radius); padding: 40px 34px;
}
.contact-info-card h3 { font-size: 22px; margin-bottom: 8px; }
.contact-info-card > p { color: #9fb4d8; font-size: 14px; margin-bottom: 28px; }
.ci-item { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.1); }
.ci-item:last-child { border-bottom: none; }
.ci-item .ci-icon { flex: none; width: 44px; height: 44px; border-radius: 11px; background: rgba(0,212,255,.14); display: flex; align-items: center; justify-content: center; font-size: 20px; }
.ci-item b { display: block; font-size: 15px; margin-bottom: 2px; }
.ci-item span { font-size: 13.5px; color: #9fb4d8; }

.contact-form { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 40px 34px; box-shadow: var(--shadow); }
.contact-form h3 { font-size: 22px; color: var(--dark); margin-bottom: 6px; }
.contact-form > p { color: var(--text-light); font-size: 14px; margin-bottom: 26px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; color: var(--dark); margin-bottom: 8px; }
.form-group label em { color: #f43f5e; font-style: normal; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1.5px solid var(--border); border-radius: 10px;
  font-size: 14.5px; font-family: inherit; color: var(--text); background: var(--bg-light);
  transition: all .3s; outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--primary); background: #fff; box-shadow: 0 0 0 4px rgba(0,124,194,.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-msg { display: none; margin-top: 16px; padding: 13px 18px; border-radius: 10px; font-size: 14px; }
.form-msg.ok { display: block; background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }
.form-msg.err { display: block; background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }

.map-box {
  margin: 46px auto 0; max-width: 704px; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); background: var(--bg-light); box-shadow: var(--shadow);
}
.map-box img { display: block; width: 100%; height: auto; }
.map-box figcaption {
  padding: 14px 18px; font-size: 14px; color: var(--text-light);
  border-top: 1px solid var(--border); background: #fff; text-align: center;
}

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); color: #8fa3c9; padding: 64px 0 0; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.footer-grid h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer-grid ul li { margin-bottom: 10px; }
.footer-grid a:hover { color: var(--accent); }
.footer-brand .logo { color: #fff; margin-bottom: 18px; flex-direction: column; align-items: flex-start; gap: 12px; }
.footer-brand .logo .logo-mark { height: 72px; padding: 0; background: transparent; border-radius: 0; }
.footer-brand .logo .logo-mark img { height: 72px; width: auto; }
.footer-brand .logo span { font-size: 19px; }
.footer-brand p { font-size: 13.5px; line-height: 1.8; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; text-align: center; font-size: 13px; color: #6b80a8; }

/* ---------- 返回顶部 ---------- */
#back-top {
  position: fixed; right: 26px; bottom: 26px; width: 46px; height: 46px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; border: none;
  font-size: 20px; cursor: pointer; opacity: 0; pointer-events: none; transition: all .3s; z-index: 900;
  box-shadow: 0 8px 20px rgba(0,124,194,.4);
}
#back-top.show { opacity: 1; pointer-events: auto; }
#back-top:hover { transform: translateY(-4px); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 992px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .industry-strip { grid-template-columns: repeat(4, 1fr); }
  .hero-slide h1 { font-size: 38px; }
  .product-hero-card { grid-template-columns: 1fr; padding: 34px 26px; }
  .solution-block { grid-template-columns: 1fr; }
  .solution-block.rev .sol-text { order: 1; }
  .solution-block.rev .sol-visual { order: 2; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  /* 移动端导航 */
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch; gap: 0;
    padding: 12px 20px 24px; box-shadow: 0 16px 30px rgba(7,26,62,.12);
    transform: translateY(-130%); transition: transform .35s ease; z-index: 999;
    max-height: calc(100vh - var(--header-h)); overflow-y: auto;
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav a { color: var(--text) !important; padding: 14px 10px; border-bottom: 1px solid var(--border); border-radius: 0; }
  .main-nav a.active::after { display: none; }
  .main-nav a.active { color: var(--primary) !important; }
  /* 移动端：下拉子菜单改为常驻展开 */
  .main-nav .has-dropdown { flex-direction: column; align-items: stretch; }
  .main-nav .has-dropdown > a { justify-content: space-between; border-bottom: 1px solid var(--border); }
  .main-nav .dropdown {
    position: static; transform: none; opacity: 1; visibility: visible;
    box-shadow: none; border: none; background: rgba(0,124,194,.04);
    padding: 4px 0 8px; min-width: 0;
  }
  .main-nav .dropdown a { padding: 11px 18px; font-size: 14px; border-bottom: none; color: var(--text-light) !important; }
  .main-nav .dropdown a:hover { background: rgba(0,124,194,.08); color: var(--primary) !important; }
  .main-nav .has-dropdown:not(.open) .dropdown { display: none; }
  .nav-cta { margin: 16px 0 0; text-align: center; border-radius: 12px !important; color: #fff !important; }
}

@media (max-width: 640px) {
  .section { padding: 60px 0; }
  .section-head h2 { font-size: 26px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-inner { padding: 120px 20px 60px; }
  .hero-slide h1 { font-size: 30px; }
  .hero-slide p { font-size: 15.5px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 24px 12px; }
  .hero-stats .stat b { font-size: 26px; }
  .page-hero { padding: 130px 0 60px; }
  .page-hero h1 { font-size: 28px; }
  .industry-strip { grid-template-columns: repeat(2, 1fr); }
  .feature-list { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .timeline::before { left: 10px; }
  .tl-item { width: 100%; left: 0 !important; text-align: left !important; padding: 0 0 36px 40px; }
  .tl-item::before { left: 3px !important; right: auto !important; }
  .counter-band b { font-size: 30px; }
}


/* ============================================================
   v2 清理新增：内联样式归类 + 表单与深色区块
   ============================================================ */

/* 深色区块内的卡片（原为内联 style） */
.section-dark .card {
  background: rgba(255, 255, 255, .05);
  border-color: rgba(255, 255, 255, .12);
}
.section-dark .card h3 { color: #fff; }
.section-dark .card p { color: #9fb4d8; }
.section-dark .card:hover { background: rgba(255, 255, 255, .09); border-color: var(--accent); }

/* 间距工具类（原为内联 style） */
.tag-row { margin-top: 18px; }
.tag-list { margin-top: 8px; }
.chips-row { margin-top: 16px; }
.sol-cta { margin-top: 18px; }
.tag-flag { margin-left: 8px; }
.btn-block { width: 100%; }

/* 表单蜜罐：对真人不可见（用 clip 方式，避免 left:-9999px 撑出横向滚动条） */
.hp {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* 表单下方的备用联系方式 */
.form-alt { margin-top: 14px; font-size: 13.5px; color: var(--text-light); text-align: center; }
.form-alt a { color: var(--primary); }
.form-alt a:hover { text-decoration: underline; }

/* 提交中状态 */
.btn:disabled { opacity: .65; cursor: not-allowed; }

/* 联系方式卡片内的链接 */
.ci-item a { color: var(--primary-light); }
.ci-item a:hover { text-decoration: underline; }