:root {
  --bg: #081629;
  --bg-2: #0c1f38;
  --card: rgba(10, 25, 47, 0.82);
  --card-2: rgba(18, 35, 62, 0.92);
  --line: rgba(255,255,255,0.10);
  --text: #eef3ff;
  --muted: #93a4c3;
  --blue: #4f7dff;
  --blue2: #7e8cff;
  --green: #24c189;
  --orange: #ff9f43;
  --red: #ff6b6b;
  --shadow: 0 20px 60px rgba(0,0,0,.32);
}
html[data-theme="light"] {
  --bg: #eef4ff;
  --bg-2: #f8fbff;
  --card: rgba(255,255,255,0.88);
  --card-2: rgba(255,255,255,0.98);
  --line: rgba(15,23,42,.08);
  --text: #12233c;
  --muted: #62708a;
  --shadow: 0 18px 50px rgba(52,86,138,.12);
}
* { box-sizing: border-box; }
html, body { margin:0; padding:0; }
body {
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(49,101,195,.38), transparent 25%),
    radial-gradient(circle at top right, rgba(31,202,212,.18), transparent 20%),
    linear-gradient(180deg, var(--bg-2), var(--bg));
  min-height:100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width:100%; display:block; }
.container { width:min(1180px, calc(100% - 32px)); margin:0 auto; }
.site-main { padding-bottom: 14px; }
.section { padding: 18px 0; }
.section--compact { padding: 12px 0; }
.section-kicker { margin:0 0 12px; color:var(--muted); font-size:14px; }
.section-title { margin:0 0 10px; font-size: clamp(24px, 4vw, 44px); line-height:1.08; }
.section-copy { margin:0; color:var(--muted); font-size:16px; line-height:1.7; }
.site-header { padding: 18px 0 10px; }
.site-header__inner {
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  padding: 16px 18px; border:1px solid var(--line); border-radius:28px;
  background:var(--card); box-shadow:var(--shadow); backdrop-filter: blur(18px);
}
.brand { display:flex; align-items:center; gap:14px; min-width:0; }
.brand__logo { width:48px; height:48px; object-fit:contain; border-radius:16px; border:1px solid var(--line); }
.brand__meta strong { display:block; font-size:18px; }
.brand__meta small { display:block; color:var(--muted); margin-top:4px; }
.site-nav { margin-left:auto; display:flex; align-items:center; gap:10px; flex-wrap:nowrap; overflow:auto; scrollbar-width:none; }
.site-nav::-webkit-scrollbar { display:none; }
.nav-link {
  display:inline-flex; align-items:center; justify-content:center; white-space:nowrap;
  min-height:42px; padding:0 16px; border-radius:999px; border:1px solid var(--line);
  background: rgba(255,255,255,.02); color: var(--text); font-weight:600;
}
.nav-link.is-active { background: rgba(92,137,255,.18); border-color: rgba(92,137,255,.28); }
.nav-link--icon { width:42px; padding:0; cursor:pointer; }
.theme-icon--moon { display:none; }
html[data-theme="light"] .theme-icon--sun { display:none; }
html[data-theme="light"] .theme-icon--moon { display:inline; }
.notice-card, .content-card, .category-card, .footer-card, .hero-card {
  background:var(--card); border:1px solid var(--line); border-radius:30px; box-shadow:var(--shadow); backdrop-filter: blur(16px);
}
.notice-card, .footer-card, .content-card, .hero-card, .category-card { padding: 28px 34px; }
.notice-content { color: var(--text); font-size: clamp(20px, 3vw, 32px); font-weight: 800; }
.hero-grid { display:grid; grid-template-columns: 1.35fr .9fr; gap:26px; align-items:stretch; }
.hero-card { min-height: 360px; display:flex; flex-direction:column; justify-content:center; }
.hero-title { margin:0 0 16px; font-size: clamp(36px, 5vw, 70px); line-height:1.05; }
.hero-copy { color:var(--muted); font-size:20px; line-height:1.65; max-width: 850px; }
.hero-actions, .form-actions { display:flex; gap:14px; align-items:center; flex-wrap:wrap; margin-top:26px; }
.form-actions--center { justify-content:center; }
.btn { display:inline-flex; align-items:center; justify-content:center; min-height:52px; padding:0 24px; border-radius:999px; border:1px solid var(--line); font-weight:700; }
.btn--primary { background: linear-gradient(135deg, var(--blue), var(--blue2)); color:#fff; box-shadow: 0 10px 28px rgba(82,118,255,.35); }
.btn--ghost { background: transparent; }
.feature-grid { display:grid; grid-template-columns: repeat(3, 1fr); gap:18px; }
.feature-grid--compact { grid-template-columns: repeat(2, 1fr); margin-top: 12px; }
.feature-item { background: var(--card-2); border:1px solid var(--line); border-radius:24px; padding:22px; }
.feature-item h3 { margin:0 0 8px; font-size: 20px; }
.feature-item p { margin:0; color:var(--muted); line-height:1.6; }
.category-card__head { display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom: 18px; }
.category-card__chips { display:flex; gap:12px; flex-wrap:wrap; padding: 16px; border-radius:24px; background:var(--card-2); border:1px solid var(--line); }
.chip-link { display:inline-flex; min-height:44px; align-items:center; padding:0 18px; border-radius:999px; border:1px solid var(--line); color:var(--text); }
.product-grid { display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap:18px; }
.product-card { display:flex; flex-direction:column; background:var(--card); border:1px solid var(--line); border-radius:28px; box-shadow:var(--shadow); overflow:hidden; }
.product-card__image { aspect-ratio: 1 / 1; background:#fff; padding:14px; }
.product-card__image img { width:100%; height:100%; object-fit:contain; border-radius:20px; }
.product-card__body { padding:18px; display:flex; flex-direction:column; gap:14px; }
.product-card__title { margin:0; font-size: clamp(20px, 2vw, 32px); line-height:1.3; }
.badge-row { display:flex; flex-wrap:wrap; gap:8px; }
.badge { display:inline-flex; align-items:center; min-height:28px; padding:0 10px; border-radius:999px; background:rgba(255,255,255,.08); font-size:12px; }
.badge--green { background: rgba(36,193,137,.18); color:#8ff1c6; }
.badge--orange { background: rgba(255,159,67,.18); color:#ffc583; }
.badge--blue { background: rgba(79,125,255,.18); color:#aabfff; }
.badge--red { background: rgba(255,107,107,.18); color:#ffb1b1; }
.product-card__price { font-size: clamp(20px, 2vw, 36px); font-weight:800; }
.buy-layout { display:grid; grid-template-columns: 300px minmax(0,1fr); gap:22px; align-items:start; }
.buy-side { display:grid; gap:18px; }
.media-card { padding:18px; }
.buy-main-image, .buy-qr-image { width:100%; background:#fff; border-radius:20px; padding:12px; }
.card-note { margin:12px 0 0; color:var(--muted); text-align:center; }
.buy-main__head { display:grid; gap:14px; margin-bottom:22px; }
.price-panel { display:flex; align-items:baseline; gap:12px; padding:18px 20px; border-radius:22px; background: var(--card-2); border:1px solid var(--line); }
.price-panel__label { color: var(--muted); }
.price-panel__current { font-size: 36px; }
.price-panel__old { color: var(--muted); text-decoration: line-through; }
.info-strip { display:grid; gap:8px; margin-bottom:22px; color:var(--muted); }
.order-form { display:grid; gap:18px; }
.form-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap:16px; }
.field { display:grid; gap:10px; }
.field.full { grid-column: 1 / -1; }
.field span { font-size:14px; color:var(--muted); }
.field input { width:100%; min-height:54px; border-radius:18px; border:1px solid var(--line); padding:0 16px; background: var(--card-2); color: var(--text); }
.captcha-wrap { display:grid; grid-template-columns: 1fr auto; gap:12px; }
.captcha-img { width:132px; height:54px; object-fit:cover; border-radius:18px; cursor:pointer; }
.payway-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap:12px; }
.payway-option { position:relative; }
.payway-option input { position:absolute; opacity:0; inset:0; }
.payway-option span { display:flex; align-items:center; min-height:54px; padding:0 16px; border-radius:18px; border:1px solid var(--line); background:var(--card-2); cursor:pointer; }
.payway-option input:checked + span { border-color: rgba(92,137,255,.35); background: rgba(92,137,255,.16); }
.product-content, .product-content * { color: var(--text) !important; max-width:100%; }
.tabs { display:grid; gap:18px; }
.tab-list { display:flex; gap:12px; flex-wrap:wrap; }
.tab { min-height:44px; padding:0 16px; border-radius:999px; border:1px solid var(--line); background:transparent; color:var(--text); cursor:pointer; }
.tab.is-active { background: rgba(92,137,255,.18); border-color: rgba(92,137,255,.28); }
.tab-panel { display:none; }
.tab-panel.is-active { display:block; }
.order-detail-grid { display:grid; grid-template-columns: 1fr 1fr; gap:20px; margin-top: 20px; }
.order-detail-column { display:grid; gap:18px; align-content:start; }
.meta-card { background: var(--card-2); border:1px solid var(--line); border-radius:24px; padding:22px; }
.meta-card p { margin:0 0 14px; line-height:1.7; }
.meta-card p:last-child { margin-bottom:0; }
.meta-card--stretch { height:100%; }
.order-info { line-height:1.85; color:var(--text); word-break:break-all; max-height:500px; overflow:auto; margin:14px 0 18px; }
.summary-table { display:grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap:12px; margin-top:18px; }
.summary-table > div { display:flex; justify-content:space-between; gap:14px; padding:18px 20px; border-radius:20px; background:var(--card-2); border:1px solid var(--line); }
.summary-table > div.full { grid-column:1 / -1; }
.summary-table span { color:var(--muted); }
.alert-card, .pay-card { text-align:center; }
.alert-card { margin-top:18px; padding:18px 22px; border-radius:20px; background: rgba(92,137,255,.14); border:1px solid rgba(92,137,255,.24); font-weight:700; }
.qr-pay-image { width:220px; margin:22px auto 10px; background:#fff; padding:12px; border-radius:22px; }
.stack { display:grid; gap:18px; }
.stack--tight { gap:8px; }
.footer-card { text-align:center; padding: 24px 30px; margin: 8px 0 22px; }
.footer-card p { margin:0 0 10px; color:var(--muted); }
.footer-card p:last-child { margin-bottom:0; color:var(--text); }
.hide-mobile { display:block; }
@media (max-width: 960px) {
  .hero-grid, .buy-layout, .order-detail-grid, .feature-grid, .summary-table { grid-template-columns:1fr; }
  .product-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .feature-grid--compact, .payway-grid, .form-grid { grid-template-columns:1fr; }
  .site-header__inner { flex-direction:column; align-items:stretch; gap:14px; padding:14px; }
  .site-nav { margin-left:0; }
  .hero-card, .content-card, .notice-card, .category-card, .footer-card { padding:22px; }
  .hero-title { font-size: clamp(34px, 10vw, 54px); }
  .brand__meta small { display:none; }
}
@media (max-width: 640px) {
  .container { width:min(100% - 12px, 100%); }
  .site-header { padding-top:10px; }
  .site-header__inner { padding:12px; border-radius:26px; }
  .brand__logo { width:42px; height:42px; }
  .brand__meta strong { font-size:16px; }
  .site-nav { gap:8px; }
  .nav-link { min-height:40px; padding:0 14px; }
  .nav-link--icon { width:40px; }
  .notice-card, .content-card, .hero-card, .category-card, .footer-card { padding:18px; border-radius:24px; }
  .section { padding:10px 0; }
  .hero-title, .section-title, .product-card__title { font-size: clamp(20px, 7vw, 34px); }
  .hero-copy, .section-copy { font-size:16px; }
  .product-grid { gap:12px; }
  .product-card { border-radius:22px; }
  .product-card__image { padding:8px; }
  .product-card__body { padding:14px; gap:10px; }
  .product-card__price { font-size:22px; }
  .buy-layout { gap:16px; }
  .buy-side { grid-template-columns: 1fr 1fr; }
  .hide-mobile { display:none; }
  .price-panel__current { font-size: 30px; }
}