/* ==========================================================================
   思问 StoreWave 官方静态站 - 全局样式
   企业科技蓝 / 深色系
   ========================================================================== */

:root {
  --bg: #070d1c;
  --bg-soft: #0a1428;
  --surface: #0e1c38;
  --surface-2: #122348;
  --surface-3: #162a52;
  --border: rgba(148, 178, 220, 0.14);
  --border-strong: rgba(148, 178, 220, 0.28);
  --primary: #3b82f6;
  --primary-2: #2563eb;
  --cyan: #22d3ee;
  --text-1: #e8eefb;
  --text-2: #a6b7d4;
  --text-3: #6b7fa3;
  --gradient: linear-gradient(135deg, #3b82f6 0%, #22d3ee 100%);
  --gradient-soft: linear-gradient(135deg, rgba(59, 130, 246, 0.16), rgba(34, 211, 238, 0.12));
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 24px 64px rgba(2, 8, 24, 0.55);
  --glow: 0 0 44px rgba(59, 130, 246, 0.28);
  --maxw: 1200px;
  --nav-h: 74px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-2);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

::selection { background: rgba(59, 130, 246, 0.4); color: #fff; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #1e3a66; border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: #2b4d85; }

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

section { position: relative; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.3s, box-shadow 0.3s, border-color 0.3s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(7, 13, 28, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: var(--gradient);
  color: #fff;
  font-weight: 800;
  font-size: 20px;
  box-shadow: 0 6px 18px rgba(59, 130, 246, 0.4);
}
.brand-text { line-height: 1.15; }
.brand-name { font-size: 19px; font-weight: 800; color: var(--text-1); letter-spacing: 1px; }
.brand-sub { font-size: 11px; color: var(--text-3); letter-spacing: 2px; text-transform: uppercase; }
.brand img.brand-img { height: 38px; width: auto; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  color: var(--text-2);
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text-1); background: rgba(59, 130, 246, 0.12); }
.nav-links a.active { color: #fff; background: rgba(59, 130, 246, 0.18); }

.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

.lang-switch { display: flex; align-items: center; gap: 2px; padding: 4px; border-radius: 10px; background: var(--surface); border: 1px solid var(--border); }
.lang-switch button {
  border: none; background: transparent; color: var(--text-3);
  font-size: 13px; padding: 5px 10px; border-radius: 7px; transition: all 0.2s;
}
.lang-switch button.active { background: var(--gradient); color: #fff; font-weight: 700; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}
.nav-toggle span { width: 20px; height: 2px; background: var(--text-1); border-radius: 2px; transition: 0.3s; }
.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;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
}
.btn-primary:hover { box-shadow: 0 12px 32px rgba(59, 130, 246, 0.55); }
.btn-ghost {
  background: transparent;
  color: var(--text-1);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { border-color: var(--primary); box-shadow: var(--glow); background: rgba(59, 130, 246, 0.1); }
.btn-lg { padding: 15px 34px; font-size: 16px; border-radius: 12px; }
.btn-sm { padding: 8px 18px; font-size: 14px; }

/* ---------- 区块标题 ---------- */
.section { padding: 96px 0; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: 2px;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 6px 16px; border-radius: 999px;
  margin-bottom: 20px;
}
.section-title { font-size: 40px; line-height: 1.25; color: var(--text-1); font-weight: 800; margin-bottom: 18px; }
.section-title .grad { background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.section-sub { font-size: 17px; color: var(--text-2); }

/* ---------- 通用卡片 ---------- */
.card {
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(59, 130, 246, 0.45);
  box-shadow: var(--shadow);
}
.card-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: grid; place-items: center;
  background: var(--gradient-soft);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: var(--cyan);
  margin-bottom: 18px;
}
.card-icon svg { width: 26px; height: 26px; }
.card h3 { font-size: 19px; color: var(--text-1); font-weight: 700; margin-bottom: 10px; }
.card p { font-size: 15px; color: var(--text-2); }

.card-grid { display: grid; gap: 24px; }
.col-2 { grid-template-columns: repeat(2, 1fr); }
.col-3 { grid-template-columns: repeat(3, 1fr); }
.col-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 72px) 0 80px;
  overflow: hidden;
  background:
    radial-gradient(1000px 480px at 78% -10%, rgba(59, 130, 246, 0.22), transparent 60%),
    radial-gradient(760px 420px at 8% 8%, rgba(34, 211, 238, 0.14), transparent 60%),
    var(--bg);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(148, 178, 220, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 178, 220, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 100%);
}
.hero-orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5; pointer-events: none; }
.hero-orb.o1 { width: 420px; height: 420px; background: rgba(37, 99, 235, 0.4); top: -120px; right: 8%; animation: float 9s ease-in-out infinite; }
.hero-orb.o2 { width: 300px; height: 300px; background: rgba(34, 211, 238, 0.3); bottom: 0; left: 2%; animation: float 12s ease-in-out infinite reverse; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-26px); } }

.hero-inner { position: relative; z-index: 2; text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 14px; color: var(--text-2);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  padding: 8px 18px; border-radius: 999px;
  margin-bottom: 30px;
}
.hero-badge .dot { width: 8px; height: 8px; 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: 0.4; } }
.hero h1 {
  font-size: 60px; line-height: 1.18;
  color: var(--text-1); font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.hero h1 .grad { background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-desc { max-width: 720px; margin: 0 auto 38px; font-size: 19px; color: var(--text-2); }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 64px; }

.hero-visual {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(18, 35, 72, 0.9), rgba(14, 28, 56, 0.9));
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero-visual-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 20px;
  background: rgba(7, 13, 28, 0.7);
  border-bottom: 1px solid var(--border);
}
.hero-visual-bar i { width: 12px; height: 12px; border-radius: 50%; }
.hero-visual-bar i:nth-child(1) { background: #ff5f57; }
.hero-visual-bar i:nth-child(2) { background: #febc2e; }
.hero-visual-bar i:nth-child(3) { background: #28c840; }
.hero-visual-body { padding: 8px; aspect-ratio: 16 / 9; position: relative; }

.mock-ui {
  position: absolute; inset: 8px;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  font-size: 12px;
}
.mock-ui .mock-side { background: rgba(10, 20, 40, 0.9); border-right: 1px solid var(--border); padding: 16px 12px; display: flex; flex-direction: column; gap: 8px; }
.mock-ui .mock-side .mock-logo { color: var(--text-1); font-weight: 700; margin-bottom: 14px; }
.mock-ui .mock-side .mock-item { padding: 8px 10px; border-radius: 8px; color: var(--text-3); }
.mock-ui .mock-side .mock-item.on { background: rgba(59, 130, 246, 0.18); color: var(--cyan); }
.mock-ui .mock-main { display: flex; flex-direction: column; padding: 16px; gap: 12px; overflow: hidden; }
.mock-toolbar { display: flex; gap: 8px; }
.mock-toolbar .mock-btn { width: 44px; height: 26px; border-radius: 6px; background: rgba(59, 130, 246, 0.18); border: 1px solid rgba(59, 130, 246, 0.3); }
.mock-toolbar .mock-btn.wide { width: 76px; }
.mock-canvas {
  flex: 1; border: 1px dashed rgba(34, 211, 238, 0.35);
  border-radius: 10px; background: rgba(8, 16, 34, 0.7);
  display: grid; place-items: center;
  color: rgba(34, 211, 238, 0.55);
  font-size: 13px; letter-spacing: 2px;
}
.mock-palette { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.mock-palette .mock-btn { width: auto; height: 30px; }

/* ---------- 数据统计 ---------- */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat { text-align: center; padding: 28px 16px; }
.stat .num { font-size: 46px; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.1; }
.stat .num .suffix { font-size: 24px; }
.stat .label { margin-top: 8px; font-size: 15px; color: var(--text-2); }

/* ---------- 客户墙 ---------- */
.logo-wall { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }
.logo-chip {
  display: inline-flex; align-items: center;
  padding: 14px 26px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 16px; font-weight: 600;
  color: var(--text-2);
  letter-spacing: 1px;
  transition: all 0.25s;
}
.logo-chip:hover { color: var(--text-1); border-color: rgba(59, 130, 246, 0.5); transform: translateY(-3px); box-shadow: var(--glow); }

/* ---------- 特性条带 ---------- */
.strip { background: linear-gradient(180deg, transparent, rgba(14, 28, 56, 0.6), transparent); }
.strip-item { display: flex; gap: 14px; align-items: flex-start; }
.strip-item .tick {
  flex-shrink: 0;
  width: 24px; height: 24px; border-radius: 50%;
  background: rgba(34, 211, 238, 0.15);
  border: 1px solid rgba(34, 211, 238, 0.4);
  display: grid; place-items: center;
  color: var(--cyan);
  margin-top: 2px;
}
.strip-item .tick svg { width: 13px; height: 13px; }
.strip-item p { font-size: 15px; color: var(--text-2); }

/* ---------- 产品截图占位 ---------- */
.screenshot {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  overflow: hidden;
  box-shadow: var(--shadow);
}
.screenshot .shot-bar { display: flex; gap: 8px; padding: 12px 16px; background: rgba(7, 13, 28, 0.7); border-bottom: 1px solid var(--border); }
.screenshot .shot-bar i { width: 10px; height: 10px; border-radius: 50%; }
.screenshot .shot-bar i:nth-child(1) { background: #ff5f57; }
.screenshot .shot-bar i:nth-child(2) { background: #febc2e; }
.screenshot .shot-bar i:nth-child(3) { background: #28c840; }
.screenshot .shot-body {
  aspect-ratio: 16 / 9;
  display: grid; place-items: center;
  background:
    linear-gradient(rgba(148, 178, 220, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 178, 220, 0.05) 1px, transparent 1px),
    var(--bg-soft);
  background-size: 40px 40px;
  color: var(--text-3);
  font-size: 15px;
  letter-spacing: 2px;
}

/* ---------- 功能页特性 ---------- */
.feature-big { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; padding: 48px 0; }
.feature-big .fb-tag { font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--cyan); text-transform: uppercase; margin-bottom: 14px; }
.feature-big h2 { font-size: 32px; color: var(--text-1); font-weight: 800; margin-bottom: 16px; }
.feature-big .fb-desc { color: var(--text-2); font-size: 16px; margin-bottom: 22px; }
.feature-big .fb-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 22px; }
.feature-big .fb-list li { display: flex; align-items: center; gap: 8px; font-size: 15px; color: var(--text-2); }
.feature-big .fb-list li svg { width: 16px; height: 16px; color: var(--cyan); flex-shrink: 0; }
.feature-big:nth-child(even) .fb-visual { order: -1; }

/* ---------- 解决方案 ---------- */
.sol-card { display: flex; flex-direction: column; }
.sol-card .sol-icon { width: 58px; height: 58px; border-radius: 16px; display: grid; place-items: center; background: var(--gradient); color: #fff; box-shadow: 0 10px 24px rgba(59, 130, 246, 0.35); margin-bottom: 20px; }
.sol-card .sol-icon svg { width: 28px; height: 28px; }
.sol-card h3 { font-size: 20px; color: var(--text-1); font-weight: 700; margin-bottom: 8px; }
.sol-card .sol-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 6px; }
.sol-card .sol-tags span { font-size: 12px; padding: 4px 10px; border-radius: 999px; background: rgba(34, 211, 238, 0.1); border: 1px solid rgba(34, 211, 238, 0.25); color: var(--cyan); }
.sol-card p { font-size: 15px; color: var(--text-2); }

/* ---------- 案例 ---------- */
.filter-bar { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-bottom: 44px; }
.filter-btn {
  padding: 9px 22px; border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: transparent; color: var(--text-2);
  font-size: 14px; font-weight: 600;
  transition: all 0.25s;
}
.filter-btn:hover { color: var(--text-1); border-color: var(--primary); }
.filter-btn.active { background: var(--gradient); color: #fff; border-color: transparent; box-shadow: 0 8px 20px rgba(59, 130, 246, 0.35); }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { overflow: hidden; padding: 0; display: flex; flex-direction: column; }
.case-thumb { aspect-ratio: 16 / 10; overflow: hidden; position: relative; }
.case-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.case-card:hover .case-thumb img { transform: scale(1.08); }
.case-thumb::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(7, 13, 28, 0.9)); }
.case-cat { position: absolute; top: 14px; left: 14px; z-index: 2; font-size: 12px; padding: 5px 12px; border-radius: 999px; background: rgba(7, 13, 28, 0.7); border: 1px solid var(--border-strong); color: var(--cyan); backdrop-filter: blur(6px); }
.case-body { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.case-body h3 { font-size: 19px; color: var(--text-1); font-weight: 700; }
.case-body .case-meta { font-size: 13px; color: var(--text-3); }
.case-body p { font-size: 14.5px; color: var(--text-2); flex: 1; }

.case-card.text-only .case-thumb {
  display: grid; place-items: center;
  background: linear-gradient(160deg, rgba(59, 130, 246, 0.16), rgba(34, 211, 238, 0.08)), var(--surface-2);
}
.case-card.text-only .case-thumb .case-initial { font-size: 44px; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* ---------- 在线体验 ---------- */
.demo-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.demo-card { position: relative; overflow: hidden; }
.demo-card .demo-head { display: flex; align-items: center; gap: 16px; margin-bottom: 14px; }
.demo-card .demo-head .demo-num { width: 46px; height: 46px; flex-shrink: 0; border-radius: 12px; background: var(--gradient); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 20px; box-shadow: 0 8px 20px rgba(59, 130, 246, 0.35); }
.demo-card h3 { font-size: 21px; color: var(--text-1); font-weight: 700; }
.demo-card .demo-role { font-size: 13px; color: var(--text-3); }
.demo-card .demo-desc { font-size: 15px; color: var(--text-2); margin-bottom: 22px; }
.demo-card .demo-link {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-3);
  background: rgba(7, 13, 28, 0.6);
  border: 1px dashed var(--border-strong);
  border-radius: 10px; padding: 10px 14px;
  word-break: break-all;
}
.demo-card .demo-link code { color: var(--cyan); }

/* ---------- 关于 / 联系 ---------- */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: start; }
.contact-card { background: linear-gradient(180deg, var(--surface-2), var(--surface)); border: 1px solid var(--border); border-radius: var(--radius); padding: 34px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; padding: 18px 0; border-bottom: 1px solid var(--border); }
.contact-item:last-child { border-bottom: none; }
.contact-item .c-icon { width: 44px; height: 44px; flex-shrink: 0; border-radius: 12px; background: var(--gradient-soft); border: 1px solid rgba(59, 130, 246, 0.3); display: grid; place-items: center; color: var(--cyan); }
.contact-item .c-icon svg { width: 20px; height: 20px; }
.contact-item h4 { font-size: 14px; color: var(--text-3); font-weight: 600; margin-bottom: 2px; }
.contact-item p { font-size: 17px; color: var(--text-1); font-weight: 600; }

.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-card { text-align: center; }
.value-card .card-icon { margin: 0 auto 18px; }

/* ---------- 地址地图 ---------- */
.map-card {
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.map-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  padding: 22px 28px;
  border-bottom: 1px solid var(--border);
}
.map-card iframe,
.map-card img {
  display: block;
  width: 100%;
  height: 440px;
  border: 0;
}
.map-card img { object-fit: cover; }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background:
    radial-gradient(600px 320px at 50% 0%, rgba(59, 130, 246, 0.25), transparent 70%),
    var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 64px 40px;
  text-align: center;
  box-shadow: var(--shadow);
}
.cta-band h2 { font-size: 34px; color: var(--text-1); font-weight: 800; margin-bottom: 14px; }
.cta-band p { font-size: 17px; color: var(--text-2); margin-bottom: 34px; }
.cta-band .hero-cta { margin-bottom: 0; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-soft); padding: 64px 0 0; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; }
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-3); max-width: 300px; }
.footer-col h4 { color: var(--text-1); font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a { font-size: 14px; color: var(--text-2); transition: color 0.2s; }
.footer-col ul a:hover { color: var(--cyan); }
.footer-bottom { border-top: 1px solid var(--border); padding: 22px 0; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 13px; color: var(--text-3); }

/* ---------- 面包屑 / 页头横幅 ---------- */
.page-hero { padding: calc(var(--nav-h) + 70px) 0 52px; text-align: center; position: relative; overflow: hidden; background: radial-gradient(800px 380px at 50% 0%, rgba(59, 130, 246, 0.18), transparent 65%); }
.page-hero h1 { font-size: 46px; color: var(--text-1); font-weight: 800; margin-bottom: 14px; }
.page-hero h1 .grad { background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.page-hero p { font-size: 18px; color: var(--text-2); max-width: 640px; margin: 0 auto; }

/* ---------- 动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .col-4 { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-big { grid-template-columns: 1fr; gap: 32px; }
  .feature-big:nth-child(even) .fb-visual { order: 0; }
  .about-grid { grid-template-columns: 1fr; }
  .demo-wrap { grid-template-columns: 1fr; }
  .hero h1 { font-size: 46px; }
  .section-title { font-size: 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(7, 13, 28, 0.97);
    border-bottom: 1px solid var(--border);
    padding: 16px 20px 20px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
  .nav-toggle { display: flex; }
  .nav-actions .btn-nav-cta { display: none; }
}

@media (max-width: 768px) {
  .hero { padding: calc(var(--nav-h) + 48px) 0 60px; }
  .hero h1 { font-size: 36px; }
  .hero-desc { font-size: 16px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .col-2, .col-3 { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .section { padding: 68px 0; }
  .page-hero h1 { font-size: 34px; }
  .cta-band { padding: 48px 24px; }
  .cta-band h2 { font-size: 26px; }
  .values-grid { grid-template-columns: 1fr; }
  .mock-ui { grid-template-columns: 120px 1fr; }
  .map-card iframe,
  .map-card img { height: 320px; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .lang-switch button { padding: 5px 8px; }
}