/* ==========================================================================
   中山元初智能科技有限公司 官网样式
   品牌色：靛蓝 #4F46E5 / 紫 #A855F7 / 亮青 #22D3EE
   ========================================================================== */
:root {
  --primary: #4F46E5;
  --primary-dark: #4338CA;
  --purple: #A855F7;
  --cyan: #22D3EE;
  --dark: #0E0D2C;
  --dark-2: #17163B;
  --text: #1F2937;
  --text-light: #6B7280;
  --bg-soft: #F5F6FB;
  --border: #E7E8F3;
  --grad: linear-gradient(135deg, #4F46E5 0%, #A855F7 60%, #22D3EE 130%);
  --grad-btn: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  --shadow-sm: 0 2px 10px rgba(79, 70, 229, .08);
  --shadow-md: 0 10px 30px rgba(79, 70, 229, .14);
  --shadow-lg: 0 20px 50px rgba(30, 27, 75, .18);
  --radius: 16px;
  --maxw: 1200px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text); background: #fff; line-height: 1.7;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(12px);
  transition: box-shadow .3s, background .3s;
}
.header.scrolled { box-shadow: 0 2px 20px rgba(20, 18, 70, .1); }
.navbar {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  height: 72px; display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { width: 42px; height: 42px; }
.brand-text { line-height: 1.25; }
.brand-text .cn { font-size: 20px; font-weight: 800; letter-spacing: 1px; }
.brand-text .cn em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.brand-text .en { font-size: 11px; color: var(--text-light); letter-spacing: 2px; text-transform: uppercase; }
.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-menu a {
  padding: 8px 16px; font-size: 15px; color: #374151; border-radius: 10px;
  transition: color .25s, background .25s; position: relative;
}
.nav-menu a:hover { color: var(--primary); background: rgba(79, 70, 229, .07); }
.nav-menu a.active { color: var(--primary); font-weight: 600; }
.nav-menu a.active::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; transform: translateX(-50%);
  width: 22px; height: 3px; border-radius: 3px; background: var(--grad);
}
.nav-actions { display: flex; align-items: center; gap: 14px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 26px; border-radius: 999px; font-size: 15px; font-weight: 600;
  transition: transform .25s, box-shadow .25s, background .25s, color .25s;
}
.btn-primary { background: var(--grad-btn); color: #fff; box-shadow: 0 8px 22px rgba(79, 70, 229, .35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(79, 70, 229, .45); }
.btn-outline { border: 1.5px solid rgba(255,255,255,.7); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.14); }
.btn-outline-dark { border: 1.5px solid var(--primary); color: var(--primary); }
.btn-outline-dark:hover { background: rgba(79,70,229,.06); }
.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn-sm { padding: 8px 20px; font-size: 14px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 24px; height: 2.5px; border-radius: 2px; background: #1F2937; transition: .3s; }

/* ---------- 首页 Banner ---------- */
.hero { position: relative; height: 92vh; min-height: 560px; overflow: hidden; }
.hero-slide {
  position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease;
  display: flex; align-items: center;
}
.hero-slide.active { opacity: 1; }
.hero-slide .bg { position: absolute; inset: 0; }
.hero-slide .bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-slide .bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(14,13,44,.88) 0%, rgba(24,20,80,.62) 45%, rgba(30,27,75,.25) 100%);
}
.hero-content { position: relative; z-index: 2; max-width: var(--maxw); margin: 0 auto; padding: 120px 24px 0; width: 100%; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 18px; border-radius: 999px; margin-bottom: 26px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.25);
  color: #CDEBFF; font-size: 14px; letter-spacing: 2px;
}
.hero-eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
.hero h1 { font-size: 52px; line-height: 1.28; color: #fff; font-weight: 800; letter-spacing: 1px; max-width: 760px; }
.hero h1 .grad-text {
  background: linear-gradient(90deg, #8FA8FF 0%, #C084FC 55%, #67E8F9 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-sub { margin: 24px 0 34px; color: rgba(226,230,255,.85); font-size: 18px; max-width: 640px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 0; margin-bottom: 42px; }
.hero-tags span {
  display: inline-flex; align-items: center; gap: 8px;
  color: #E4E7FF; font-size: 15px; padding: 6px 22px;
}
.hero-tags span + span { border-left: 1px solid rgba(255,255,255,.28); }
.hero-tags i { width: 8px; height: 8px; border-radius: 50%; background: var(--grad); display: inline-block; flex: none; }
.hero-btns { display: flex; gap: 18px; flex-wrap: wrap; }
.hero-dots { position: absolute; bottom: 46px; left: 50%; transform: translateX(-50%); z-index: 5; display: flex; gap: 12px; }
.hero-dots button { width: 40px; height: 4px; border-radius: 4px; background: rgba(255,255,255,.32); transition: .3s; }
.hero-dots button.active { background: var(--grad); width: 60px; }
.hero-scroll { position: absolute; bottom: 88px; left: 50%; transform: translateX(-50%); z-index: 4; color: rgba(255,255,255,.55); font-size: 12px; letter-spacing: 3px; animation: bounce 2.2s infinite; }
@keyframes bounce { 0%,100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 8px); } }

/* ---------- 动态滚动条 ---------- */
.ticker { background: var(--bg-soft); border-bottom: 1px solid var(--border); }
.ticker-inner { display: flex; align-items: center; gap: 18px; height: 56px; overflow: hidden; }
.ticker-label { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--primary); font-size: 15px; flex: none; }
.ticker-label::before { content: ""; width: 4px; height: 18px; border-radius: 2px; background: var(--grad); }
.ticker-list { flex: 1; height: 56px; overflow: hidden; position: relative; }
.ticker-track { position: absolute; width: 100%; animation: tickerUp 16s linear infinite; }
.ticker-track a { display: block; height: 56px; line-height: 56px; color: #4B5563; font-size: 14.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ticker-track a:hover { color: var(--primary); }
.ticker-track a::before { content: "●"; color: var(--cyan); font-size: 9px; margin-right: 10px; vertical-align: 2px; }
@keyframes tickerUp { 0%,20% { top: 0; } 25%,45% { top: -56px; } 50%,70% { top: -112px; } 75%,95% { top: -168px; } 100% { top: -224px; } }

/* ---------- 通用板块 ---------- */
.section { padding: 96px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.section-head .tag {
  display: inline-block; padding: 5px 16px; border-radius: 999px; font-size: 13px; letter-spacing: 2px;
  color: var(--primary); background: rgba(79,70,229,.08); border: 1px solid rgba(79,70,229,.18); margin-bottom: 16px;
}
.section-head h2 { font-size: 36px; font-weight: 800; letter-spacing: 1px; }
.section-head .bar { width: 64px; height: 4px; border-radius: 4px; background: var(--grad); margin: 18px auto 20px; }
.section-head p { color: var(--text-light); font-size: 16px; }

/* ---------- 核心业务卡片 ---------- */
.services-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 22px; }
.service-card {
  background: #fff; border-radius: var(--radius); padding: 34px 24px 30px; text-align: left;
  border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  transition: transform .35s, box-shadow .35s, border-color .35s; position: relative; overflow: hidden;
}
.service-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--grad); opacity: 0; transition: opacity .35s;
}
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: rgba(124,58,237,.25); }
.service-card:hover::before { opacity: 1; }
.service-icon {
  width: 62px; height: 62px; border-radius: 18px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(79,70,229,.1), rgba(168,85,247,.12));
  margin-bottom: 22px; transition: transform .35s;
}
.service-card:hover .service-icon { transform: scale(1.08) rotate(-4deg); }
.service-icon svg { width: 30px; height: 30px; }
.service-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 12px; }
.service-card p { color: var(--text-light); font-size: 14px; line-height: 1.75; min-height: 98px; }
.service-card .more { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; color: var(--primary); font-size: 14px; font-weight: 600; }
.service-card .more:hover { gap: 10px; transition: gap .25s; }

/* ---------- 数据统计带 ---------- */
.stats { background: linear-gradient(115deg, #1A1747 0%, #2D1B69 55%, #4C2A85 100%); position: relative; overflow: hidden; }
.stats::before {
  content: ""; position: absolute; width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(34,211,238,.16), transparent 65%);
  top: -220px; right: -120px;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 64px 0; position: relative; }
.stat-item { text-align: center; }
.stat-num { font-size: 46px; font-weight: 800; color: #fff; font-family: "DIN Alternate", "Segoe UI", sans-serif; }
.stat-num small { font-size: 24px; }
.stat-num i { font-style: normal; background: linear-gradient(90deg, #8FA8FF, #67E8F9); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { color: rgba(226,230,255,.75); font-size: 15px; margin-top: 6px; letter-spacing: 1px; }

/* ---------- 场景卡片 ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scene-card {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 28px;
  background: #fff; transition: transform .3s, box-shadow .3s; position: relative; overflow: hidden;
}
.scene-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.scene-num { position: absolute; right: 20px; top: 14px; font-size: 44px; font-weight: 800; color: rgba(79,70,229,.07); }
.scene-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.scene-card h3 .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--grad); flex: none; }
.scene-card p { color: var(--text-light); font-size: 14px; }

/* ---------- 服务流程 ---------- */
.process-flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; position: relative; }
.process-flow::before {
  content: ""; position: absolute; top: 27px; left: 8%; right: 8%; height: 2px;
  background: linear-gradient(90deg, rgba(79,70,229,.15), rgba(124,58,237,.5), rgba(34,211,238,.4));
}
.process-item { text-align: center; position: relative; padding: 0 6px; }
.process-step {
  width: 54px; height: 54px; border-radius: 50%; margin: 0 auto 16px; position: relative; z-index: 2;
  background: #fff; border: 2px solid rgba(124,58,237,.35); display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: var(--primary); font-size: 17px; transition: .3s;
}
.process-item:hover .process-step { background: var(--grad-btn); color: #fff; border-color: transparent; box-shadow: 0 8px 20px rgba(124,58,237,.4); }
.process-item h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.process-item p { font-size: 13px; color: var(--text-light); line-height: 1.65; }

/* ---------- 案例卡片 ---------- */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.case-card {
  border-radius: var(--radius); overflow: hidden; background: #fff; border: 1px solid var(--border);
  transition: transform .35s, box-shadow .35s; display: flex; flex-direction: column;
}
.case-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.case-cover { position: relative; height: 218px; overflow: hidden; }
.case-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-card:hover .case-cover img { transform: scale(1.06); }
.case-cover .cat {
  position: absolute; top: 14px; left: 14px; z-index: 2; padding: 4px 14px; border-radius: 999px;
  background: rgba(14,13,44,.62); backdrop-filter: blur(6px); color: #fff; font-size: 12.5px; letter-spacing: 1px;
}
.case-body { padding: 24px 26px 26px; flex: 1; display: flex; flex-direction: column; }
.case-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.case-body p { color: var(--text-light); font-size: 14px; flex: 1; }
.case-body .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.case-body .tags span { font-size: 12px; padding: 3px 12px; border-radius: 999px; background: rgba(79,70,229,.07); color: var(--primary); }
.case-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; color: var(--primary); font-size: 14px; font-weight: 600; }

/* 案例筛选 Tab */
.filter-bar { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-bottom: 46px; }
.filter-bar button {
  padding: 9px 24px; border-radius: 999px; font-size: 14.5px; color: #4B5563;
  background: #fff; border: 1px solid var(--border); transition: .25s;
}
.filter-bar button:hover { color: var(--primary); border-color: rgba(124,58,237,.4); }
.filter-bar button.active { background: var(--grad-btn); color: #fff; border-color: transparent; box-shadow: 0 6px 18px rgba(124,58,237,.35); }

/* ---------- 关于我们（首页摘要） ---------- */
.about-split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 60px; align-items: center; }
.about-img { position: relative; }
.about-img img { border-radius: var(--radius); box-shadow: var(--shadow-lg); }
.about-img .float-card {
  position: absolute; left: -18px; bottom: 28px; background: #fff; border-radius: 14px;
  padding: 16px 24px; box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 14px;
}
.about-img .float-card b { font-size: 26px; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.about-img .float-card span { font-size: 13px; color: var(--text-light); }
.about-content h2 { font-size: 34px; font-weight: 800; margin-bottom: 8px; }
.about-content .bar { width: 56px; height: 4px; background: var(--grad); border-radius: 4px; margin: 16px 0 22px; }
.about-content > p { color: var(--text-light); font-size: 15.5px; margin-bottom: 26px; }
.about-points { display: grid; gap: 14px; margin-bottom: 32px; }
.about-points li { display: flex; gap: 12px; align-items: flex-start; }
.about-points .ck { flex: none; width: 22px; height: 22px; border-radius: 50%; background: rgba(34,211,238,.14); color: #0E9CBF; display: flex; align-items: center; justify-content: center; font-size: 12px; margin-top: 2px; }
.about-points b { font-size: 15.5px; }
.about-points p { font-size: 14px; color: var(--text-light); }

/* ---------- 资讯卡片 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.news-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: transform .3s, box-shadow .3s; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.news-cover { height: 190px; overflow: hidden; position: relative; }
.news-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-card:hover .news-cover img { transform: scale(1.05); }
.news-cover .cat { position: absolute; top: 14px; left: 14px; padding: 3px 13px; border-radius: 999px; background: var(--grad-btn); color: #fff; font-size: 12px; }
.news-body { padding: 22px 24px 26px; }
.news-body .date { color: #9CA3AF; font-size: 13px; margin-bottom: 8px; }
.news-body h3 { font-size: 17px; font-weight: 700; line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-body h3:hover { color: var(--primary); }
.news-body p { color: var(--text-light); font-size: 13.5px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------- CTA 横幅 ---------- */
.cta-band { position: relative; overflow: hidden; background: linear-gradient(115deg, #241C63 0%, #43318F 55%, #5B3D9E 100%); }
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 82% 30%, rgba(34,211,238,.22), transparent 45%),
              radial-gradient(circle at 15% 80%, rgba(168,85,247,.25), transparent 42%);
}
.cta-inner { position: relative; padding: 76px 0; text-align: center; }
.cta-inner h2 { color: #fff; font-size: 34px; font-weight: 800; margin-bottom: 14px; }
.cta-inner p { color: rgba(230,232,255,.8); font-size: 16px; margin-bottom: 34px; }
.cta-inner .btns { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

/* ---------- 内页页头 ---------- */
.page-hero { position: relative; padding: 172px 0 92px; color: #fff; overflow: hidden; background: linear-gradient(115deg, #191545 0%, #342577 55%, #4A3590 100%); }
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 85% 20%, rgba(34,211,238,.18), transparent 45%),
              radial-gradient(circle at 10% 90%, rgba(168,85,247,.2), transparent 40%);
}
.page-hero .container { position: relative; }
.crumbs { font-size: 13.5px; color: rgba(226,230,255,.65); margin-bottom: 14px; }
.crumbs a:hover { color: #fff; }
.crumbs i { font-style: normal; margin: 0 8px; opacity: .6; }
.page-hero h1 { font-size: 40px; font-weight: 800; letter-spacing: 1px; margin-bottom: 12px; }
.page-hero p { color: rgba(226,230,255,.8); font-size: 16px; max-width: 640px; }

/* ---------- 服务详情页 ---------- */
.service-detail { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: center; padding: 70px 0; }
.service-detail:nth-of-type(even) { background: var(--bg-soft); }
.service-detail.reverse { grid-template-columns: 1.1fr 1fr; }
.service-detail.reverse .sd-visual { order: -1; }
.sd-visual { position: relative; }
.sd-visual img { border-radius: var(--radius); box-shadow: var(--shadow-lg); }
.sd-visual .badge {
  position: absolute; top: -16px; right: -10px; padding: 8px 20px; border-radius: 999px;
  background: var(--grad-btn); color: #fff; font-size: 13px; font-weight: 600; box-shadow: 0 8px 20px rgba(124,58,237,.4);
}
.sd-content .num { font-size: 14px; font-weight: 700; color: var(--cyan); letter-spacing: 3px; margin-bottom: 8px; }
.sd-content h2 { font-size: 30px; font-weight: 800; margin-bottom: 6px; }
.sd-content .bar { width: 52px; height: 4px; background: var(--grad); border-radius: 4px; margin: 16px 0 20px; }
.sd-content > p { color: var(--text-light); font-size: 15px; margin-bottom: 24px; }
.sd-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 22px; margin-bottom: 28px; }
.sd-list li { display: flex; align-items: center; gap: 10px; font-size: 14.5px; }
.sd-list .ck { flex: none; width: 20px; height: 20px; border-radius: 6px; background: rgba(79,70,229,.1); color: var(--primary); font-size: 11px; display: flex; align-items: center; justify-content: center; }
.sd-visual .art {
  height: 320px; border-radius: var(--radius);
  background: linear-gradient(135deg, #EEF0FF 0%, #F6EEFF 60%, #EAFCFF 100%);
  display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-md);
}
.sd-visual .art svg { width: 150px; height: 150px; }

/* ---------- 关于页 ---------- */
.mvv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.mvv-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 40px 32px; text-align: center; transition: .3s; }
.mvv-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.mvv-icon { width: 66px; height: 66px; margin: 0 auto 20px; border-radius: 20px; background: linear-gradient(135deg, rgba(79,70,229,.1), rgba(34,211,238,.12)); display: flex; align-items: center; justify-content: center; }
.mvv-icon svg { width: 32px; height: 32px; }
.mvv-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.mvv-card p { color: var(--text-light); font-size: 14.5px; }
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(180deg, #4F46E5, #A855F7, #22D3EE); }
.timeline-item { position: relative; padding: 0 0 40px 28px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ""; position: absolute; left: -32px; top: 6px; width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 3px solid var(--primary); box-shadow: 0 0 0 5px rgba(79,70,229,.12);
}
.timeline-item .year { font-weight: 800; font-size: 20px; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.timeline-item h4 { font-size: 17px; font-weight: 700; margin: 4px 0 6px; }
.timeline-item p { color: var(--text-light); font-size: 14.5px; }
.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.value-item { text-align: center; padding: 30px 20px; border-radius: var(--radius); background: #fff; border: 1px solid var(--border); transition: .3s; }
.value-item:hover { box-shadow: var(--shadow-md); transform: translateY(-5px); }
.value-item b { display: block; font-size: 17px; margin-bottom: 8px; }
.value-item span { font-size: 13.5px; color: var(--text-light); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.25fr; gap: 40px; align-items: start; }
.contact-cards { display: grid; gap: 18px; }
.contact-card { display: flex; gap: 16px; padding: 24px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); transition: .3s; }
.contact-card:hover { box-shadow: var(--shadow-md); }
.contact-icon { flex: none; width: 50px; height: 50px; border-radius: 14px; background: linear-gradient(135deg, rgba(79,70,229,.1), rgba(168,85,247,.12)); display: flex; align-items: center; justify-content: center; }
.contact-icon svg { width: 24px; height: 24px; }
.contact-card b { font-size: 15.5px; display: block; margin-bottom: 4px; }
.contact-card span { color: var(--text-light); font-size: 14px; }
.form-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 38px; box-shadow: var(--shadow-sm); }
.form-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.form-card > 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; margin-bottom: 8px; }
.form-group label i { color: #EF4444; font-style: normal; margin-left: 3px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1.5px solid var(--border); border-radius: 12px;
  font-size: 14.5px; font-family: inherit; color: var(--text); background: #FAFAFD; transition: .25s; 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(79,70,229,.1); }
.form-group textarea { resize: vertical; min-height: 110px; }
.form-tip { font-size: 12.5px; color: #9CA3AF; margin-top: 14px; }
.form-success {
  display: none; text-align: center; padding: 30px 0 10px;
}
.form-success.show { display: block; }
.form-success .ok { width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 50%; background: rgba(34,197,94,.12); color: #16A34A; font-size: 30px; display: flex; align-items: center; justify-content: center; }
.form-success h4 { font-size: 19px; margin-bottom: 8px; }
.form-success p { color: var(--text-light); font-size: 14px; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: 14px; margin-bottom: 14px; background: #fff; overflow: hidden; transition: .25s; }
.faq-item.open { border-color: rgba(124,58,237,.35); box-shadow: var(--shadow-sm); }
.faq-q { width: 100%; text-align: left; padding: 20px 24px; font-size: 15.5px; font-weight: 600; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq-q .plus { flex: none; width: 24px; height: 24px; border-radius: 50%; background: rgba(79,70,229,.08); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 16px; transition: transform .3s; }
.faq-item.open .plus { transform: rotate(45deg); background: var(--grad-btn); color: #fff; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a p { padding: 0 24px 22px; color: var(--text-light); font-size: 14.5px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--dark); color: rgba(226,230,255,.72); }
.footer-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 44px; padding: 68px 0 48px; }
.footer-brand img { width: 46px; height: 46px; margin-bottom: 16px; }
.footer-brand .name { color: #fff; font-size: 19px; font-weight: 700; letter-spacing: 1px; margin-bottom: 4px; }
.footer-brand .en { font-size: 11px; letter-spacing: 2px; color: rgba(226,230,255,.4); margin-bottom: 18px; }
.footer-brand p { font-size: 13.5px; line-height: 1.85; }
.footer h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 20px; letter-spacing: 1px; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { font-size: 14px; transition: color .25s, padding-left .25s; }
.footer-links a:hover { color: #67E8F9; padding-left: 4px; }
.footer-contact li { display: flex; gap: 10px; font-size: 14px; margin-bottom: 14px; line-height: 1.6; }
.footer-contact svg { flex: none; width: 17px; height: 17px; margin-top: 4px; }
.footer-contact a:hover { color: #67E8F9; }

/* ---------- 页脚微信二维码 ---------- */
.footer-qr { display: flex; align-items: center; gap: 14px; margin-top: 18px; }
.footer-qr img {
  width: 92px; height: auto; border-radius: 12px; flex: none;
  border: 1px solid rgba(255,255,255,.22); box-shadow: 0 4px 18px rgba(0,0,0,.35);
}
.footer-qr span { font-size: 13px; color: rgba(226,230,255,.75); line-height: 1.7; }
.footer-qr span b { color: #fff; font-size: 14px; display: block; margin-bottom: 2px; }

/* ---------- 联系页二维码卡片 ---------- */
.contact-card .card-qr {
  width: 96px; height: auto; border-radius: 10px; border: 1px solid var(--border); flex: none;
}
.wechat-card { align-items: center; }
.wechat-card > div { display: flex; flex-direction: column; justify-content: center; }
.contact-card a { color: inherit; }
.contact-card a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.09); padding: 22px 0; }
.footer-bottom .container { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; font-size: 13px; color: rgba(226,230,255,.5); }
.footer-bottom a { color: rgba(226,230,255,.6); transition: color .25s; }
.footer-bottom a:hover { color: #67E8F9; }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed; right: 26px; bottom: 30px; z-index: 900;
  width: 46px; height: 46px; border-radius: 14px; background: var(--grad-btn); color: #fff;
  display: flex; align-items: center; justify-content: center; box-shadow: 0 8px 24px rgba(79,70,229,.4);
  opacity: 0; visibility: hidden; transform: translateY(14px); transition: .35s;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { transform: translateY(-4px); }
.back-top svg { width: 20px; height: 20px; }

/* ---------- 入场动画（仅在 JS 可用时启用，禁 JS/爬虫时内容直接可见） ---------- */
html.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
html.js .reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .1s; } .reveal.d2 { transition-delay: .2s; } .reveal.d3 { transition-delay: .3s; }
.reveal.d4 { transition-delay: .4s; } .reveal.d5 { transition-delay: .5s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 42px; }
}
@media (max-width: 860px) {
  .nav-menu {
    position: fixed; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column;
    align-items: stretch; padding: 12px 20px 22px; gap: 2px; box-shadow: 0 20px 40px rgba(20,18,70,.12);
    transform: translateY(-16px); opacity: 0; visibility: hidden; transition: .3s; max-height: calc(100vh - 72px); overflow-y: auto;
  }
  .nav-menu.open { transform: none; opacity: 1; visibility: visible; }
  .nav-menu a { padding: 13px 14px; font-size: 15px; }
  .nav-toggle { display: flex; }
  .nav-actions .btn { display: none; }
  .hero { height: auto; min-height: 0; padding: 150px 0 90px; }
  .hero-slide { position: relative; display: none; }
  .hero-slide.active { display: flex; opacity: 1; }
  .hero-content { padding-top: 0; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 15.5px; }
  .hero-tags span { padding: 4px 12px; font-size: 13.5px; }
  .hero-dots { bottom: 34px; }
  .hero-scroll { display: none; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-flow { grid-template-columns: repeat(3, 1fr); row-gap: 36px; }
  .process-flow::before { display: none; }
  .about-split { grid-template-columns: 1fr; gap: 40px; }
  .service-detail, .service-detail.reverse { grid-template-columns: 1fr; gap: 36px; padding: 56px 0; }
  .service-detail.reverse .sd-visual { order: 0; }
  .sd-list { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; padding: 54px 0 36px; }
  .section { padding: 68px 0; }
  .section-head h2 { font-size: 27px; }
  .page-hero { padding: 140px 0 64px; }
  .page-hero h1 { font-size: 30px; }
  .mvv-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .services-grid { grid-template-columns: 1fr; }
  .scene-grid { grid-template-columns: 1fr; }
  .cases-grid, .news-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-flow { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom .container { justify-content: center; text-align: center; }
  .hero h1 { font-size: 27px; }
  .stat-num { font-size: 36px; }
}