/* =========================================================
   时代硅基 · 智慧园区一码通 — 官网统一设计系统
   深色科技风 / 响应式 / 零外部依赖
   ========================================================= */
:root {
  --bg: #0a0e1a;
  --bg-2: #0d1426;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(6, 182, 212, 0.35);
  --text: #f8fafc;
  --muted: #94a3b8;
  --muted-2: #64748b;
  --cyan: #06b6d4;
  --blue: #3b82f6;
  --violet: #8b5cf6;
  --grad: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
  --grad-soft: linear-gradient(135deg, rgba(6, 182, 212, 0.12), rgba(139, 92, 246, 0.12));
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1180px;
  --nav-h: 64px;
  --shadow: 0 20px 60px rgba(59, 130, 246, 0.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Heiti SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--cyan); text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------- 背景光斑 ---------- */
.bg-fx { position: fixed; inset: 0; z-index: -1; pointer-events: none; }
.bg-fx::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 64px 64px;
}
.bg-fx::after {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(700px 520px at 12% 18%, rgba(59, 130, 246, 0.14), transparent 70%),
    radial-gradient(620px 620px at 88% 82%, rgba(139, 92, 246, 0.12), transparent 70%),
    radial-gradient(520px 520px at 50% 50%, rgba(6, 182, 212, 0.07), transparent 70%);
}

/* ---------- 通用容器 / 区块 ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: clamp(64px, 9vw, 120px) 0; position: relative; }
.section-title {
  font-size: clamp(28px, 4.4vw, 42px); font-weight: 700; line-height: 1.2;
  letter-spacing: -0.5px; margin-bottom: 16px;
}
.section-title .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.section-sub { font-size: clamp(15px, 2vw, 17px); color: var(--muted); max-width: 680px; }
.section-head { margin-bottom: clamp(36px, 5vw, 56px); }
.section-tag {
  display: inline-block; font-size: 12px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--cyan); background: rgba(6, 182, 212, 0.1); border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 5px 14px; border-radius: 100px; margin-bottom: 16px; font-weight: 600;
}

/* ---------- 顶栏 ---------- */
.topbar {
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.08), rgba(6, 182, 212, 0.08));
  border-bottom: 1px solid var(--border); font-size: 13px; color: var(--muted);
}
.topbar-inner { max-width: var(--maxw); margin: 0 auto; padding: 8px 24px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.topbar .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; font-weight: 600; }
.topbar-btns { display: flex; gap: 10px; }
.topbar-btns a { color: var(--text); opacity: 0.85; }
.topbar-btns a:hover { opacity: 1; color: var(--cyan); }

/* ---------- 导航 ---------- */
.nav { position: sticky; top: 0; z-index: 100; background: rgba(10, 14, 26, 0.72); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 36px; height: 36px; border-radius: 10px; background: var(--grad); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: 16px; box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4); }
.brand-name { font-size: 16px; font-weight: 700; color: var(--text); line-height: 1.1; }
.brand-tag { font-size: 11px; color: var(--muted-2); margin-top: 2px; letter-spacing: 0.5px; }
.nav-menu { display: flex; align-items: center; gap: 26px; }
.nav-menu a { font-size: 14px; color: var(--muted); transition: color 0.2s; position: relative; padding: 6px 0; }
.nav-menu a:hover, .nav-menu a.active { color: var(--text); }
.nav-menu a.active::after { content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%); width: 22px; height: 2px; background: var(--grad); border-radius: 2px; }
.nav-cta { background: var(--grad); color: #fff !important; padding: 9px 20px; border-radius: 8px; font-size: 14px; font-weight: 600; box-shadow: 0 4px 16px rgba(6, 182, 212, 0.3); }
.nav-cta:hover { filter: brightness(1.08); }
.nav-login { border: 1px solid var(--border-strong); color: var(--text) !important; padding: 8px 18px; border-radius: 8px; font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; transition: border-color .2s, background .2s; }
.nav-login:hover { border-color: var(--cyan); background: rgba(6, 182, 212, 0.1); }
.nav-login::before { content: "🔐"; font-size: 13px; }
.nav-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--border); background: var(--panel); border-radius: 10px; cursor: pointer; flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
.nav-toggle span { width: 18px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.25s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 28px; border-radius: 10px; font-size: 15px; font-weight: 600; cursor: pointer; border: none; transition: transform 0.2s, box-shadow 0.2s, filter 0.2s; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 32px rgba(6, 182, 212, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(6, 182, 212, 0.4); }
.btn-ghost { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--cyan); background: var(--panel); }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 玻璃卡片 ---------- */
.glass {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; position: relative; overflow: hidden; transition: transform 0.25s, border-color 0.25s, background 0.25s;
}
.glass::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent); }
.glass:hover { transform: translateY(-3px); border-color: var(--border-strong); background: var(--panel-2); box-shadow: var(--shadow); }
.glass .icon { width: 48px; height: 48px; border-radius: 12px; background: var(--grad-soft); display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 18px; }
.glass h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.glass p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* ---------- 自适应网格 ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-auto-sm { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* ---------- Hero ---------- */
.hero { padding: clamp(70px, 11vw, 140px) 0 clamp(60px, 8vw, 110px); text-align: center; position: relative; overflow: hidden; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(6, 182, 212, 0.1); border: 1px solid rgba(6, 182, 212, 0.3); padding: 6px 16px; border-radius: 100px; font-size: 13px; color: var(--cyan); margin-bottom: 28px; }
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }
.hero h1 { font-size: clamp(34px, 6.5vw, 64px); font-weight: 800; line-height: 1.12; letter-spacing: -1px; margin-bottom: 22px; }
.hero h1 .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { font-size: clamp(15px, 2.2vw, 19px); color: var(--muted); max-width: 760px; margin: 0 auto 22px; line-height: 1.7; }
.hero-prod { display: inline-block; margin: 0 auto 40px; padding: 10px 18px; border-radius: 12px; background: var(--grad-soft); border: 1px solid var(--border-strong); font-size: 14px; color: var(--text); }
.hero-prod b { color: var(--cyan); }
.hero-stats { display: flex; gap: clamp(24px, 5vw, 56px); justify-content: center; flex-wrap: wrap; margin-top: 56px; }
.stat .num { font-size: clamp(30px, 4.5vw, 42px); font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .label { font-size: 13px; color: var(--muted); margin-top: 4px; }

/* ---------- 产品页 hero 双栏 ---------- */
.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.split .lead { font-size: clamp(16px, 2.2vw, 19px); color: var(--muted); line-height: 1.8; margin: 18px 0 28px; }
.kv { display: flex; flex-direction: column; gap: 12px; }
.kv .row { display: flex; gap: 12px; align-items: flex-start; font-size: 14px; color: var(--muted); }
.kv .row .tick { color: var(--cyan); font-weight: 700; }

/* ---------- 特性行 ---------- */
.feature { display: flex; gap: 18px; align-items: flex-start; padding: 18px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--panel); }
.feature .ico { font-size: 26px; flex: none; }
.feature h4 { font-size: 16px; margin-bottom: 4px; }
.feature p { font-size: 13px; color: var(--muted); }

/* ---------- 价格卡 ---------- */
.price { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 26px; display: flex; flex-direction: column; position: relative; transition: transform 0.25s, border-color 0.25s; }
.price:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.price.featured { border-color: var(--border-strong); background: var(--grad-soft); box-shadow: 0 0 40px rgba(6, 182, 212, 0.18); }
.price .tag { position: absolute; top: 16px; right: 16px; background: var(--grad); color: #fff; font-size: 11px; padding: 3px 10px; border-radius: 100px; font-weight: 600; }
.price .tier { font-size: 12px; letter-spacing: 2px; color: var(--cyan); margin-bottom: 8px; }
.price .name { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.price .desc { font-size: 13px; color: var(--muted); margin-bottom: 18px; min-height: 38px; }
.price .amount { font-size: 30px; font-weight: 800; margin-bottom: 18px; }
.price .amount small { font-size: 13px; color: var(--muted-2); font-weight: 400; }
.price ul { list-style: none; font-size: 13.5px; display: flex; flex-direction: column; gap: 10px; margin-bottom: 22px; flex: 1; }
.price li { color: var(--muted); display: flex; gap: 8px; }
.price li::before { content: "✓"; color: var(--cyan); font-weight: 700; }
.price .btn { justify-content: center; }

/* ---------- 案例卡 ---------- */
.case { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.case .who { font-size: 12px; color: var(--cyan); background: rgba(6, 182, 212, 0.08); padding: 5px 12px; border-radius: 6px; display: inline-block; margin-bottom: 14px; }
.case .quote { font-size: 15px; color: var(--text); line-height: 1.8; font-style: italic; margin-bottom: 18px; }
.case .metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.case .metrics .m { background: rgba(6, 182, 212, 0.07); border-radius: 10px; padding: 12px; text-align: center; }
.case .metrics .v { font-size: 18px; font-weight: 700; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.case .metrics .l { font-size: 11px; color: var(--muted-2); margin-top: 2px; }

/* ---------- 分层架构 ---------- */
.layer { border-radius: var(--radius); padding: 26px 30px; background: var(--panel); border: 1px solid var(--border); position: relative; overflow: hidden; }
.layer::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--grad); }
.layer .lt { font-size: 11px; letter-spacing: 2px; color: var(--muted); margin-bottom: 6px; font-weight: 600; }
.layer .ln { font-size: 20px; font-weight: 700; color: var(--cyan); margin-bottom: 10px; }
.layer .ld { font-size: 14px; color: var(--muted); line-height: 1.8; }
.layer-stack { display: flex; flex-direction: column; gap: 16px; max-width: 960px; margin: 0 auto; }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-info .item { display: flex; gap: 14px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.contact-info .item .ico { font-size: 22px; }
.contact-info .item .k { font-size: 13px; color: var(--muted-2); }
.contact-info .item .v { font-size: 15px; color: var(--text); }
.form { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.form label { display: block; font-size: 13px; color: var(--muted); margin: 14px 0 6px; }
.form input, .form textarea, .form select { width: 100%; font-size: 15px; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg-2); color: var(--text); font-family: inherit; }
.form input:focus, .form textarea:focus, .form select:focus { outline: none; border-color: var(--cyan); }
.form textarea { min-height: 110px; resize: vertical; }

/* ---------- 页脚 ---------- */
.footer { background: linear-gradient(180deg, #0a0e1a, #050813); border-top: 1px solid var(--border); padding: 56px 0 24px; font-size: 13px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer h4 { color: var(--text); font-size: 13px; margin-bottom: 14px; font-weight: 600; }
.footer a { display: block; color: var(--muted); padding: 5px 0; }
.footer a:hover { color: var(--cyan); }
.footer .brand-blurb { color: var(--muted); font-size: 13px; line-height: 1.7; margin-top: 14px; max-width: 320px; }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 20px; color: var(--muted-2); text-align: center; font-size: 12px; line-height: 1.8; }

/* ---------- CTA 条 ---------- */
.cta-band { background: var(--grad-soft); border: 1px solid var(--border-strong); border-radius: 20px; padding: clamp(32px, 5vw, 56px); text-align: center; }
.cta-band h2 { font-size: clamp(24px, 4vw, 36px); font-weight: 700; margin-bottom: 14px; }
.cta-band p { color: var(--muted); margin-bottom: 26px; }

/* ---------- 多端入口总览 ---------- */
.portal-grid { display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.portal { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; transition: transform .25s, border-color .25s, background .25s; position: relative; overflow: hidden; }
.portal::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent); }
.portal:hover { transform: translateY(-3px); border-color: var(--border-strong); background: var(--panel-2); box-shadow: var(--shadow); }
.portal .pic { width: 52px; height: 52px; border-radius: 14px; background: var(--grad-soft); display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 16px; }
.portal h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.portal p { font-size: 14px; color: var(--muted); line-height: 1.7; margin-bottom: 18px; flex: 1; }
.portal .enter { display: inline-flex; align-items: center; gap: 6px; color: var(--cyan); font-weight: 600; font-size: 14px; transition: gap .2s; }
.portal .enter:hover { gap: 10px; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .split { grid-template-columns: 1fr; gap: 28px; }
  .contact-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 760px) {
  .nav-menu { position: fixed; top: var(--nav-h); left: 0; right: 0; background: rgba(10, 14, 26, 0.97); backdrop-filter: blur(20px); flex-direction: column; align-items: stretch; gap: 0; padding: 12px 24px 20px; border-bottom: 1px solid var(--border); transform: translateY(-120%); transition: transform 0.28s; max-height: calc(100vh - var(--nav-h)); overflow-y: auto; }
  .nav-menu.open { transform: translateY(0); }
  .nav-menu a { padding: 14px 0; border-bottom: 1px solid var(--border); }
  .nav-menu a.active::after { display: none; }
  .nav-cta { margin-top: 12px; text-align: center; }
  .nav-toggle { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .topbar-inner { font-size: 11px; padding: 8px 16px; }
  .topbar-btns { display: none; }
  .container { padding: 0 18px; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }