:root {
  --bg: #f5f5f7;
  --bg-alt: #ffffff;
  --card: rgba(255, 255, 255, 0.82);
  --card-strong: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(29, 29, 31, 0.08);
  --brand: #0071e3;
  --brand-dark: #0058b0;
  --brand-soft: rgba(0, 113, 227, 0.08);
  --hero-dark: #0b1220;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.08);
  --shadow-soft: 0 12px 34px rgba(15, 23, 42, 0.05);
  --radius: 28px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "SF Pro Display", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease, opacity 0.25s ease, transform 0.25s ease;
}
img { max-width: 100%; display: block; }
.wrap { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.76);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(29, 29, 31, 0.06);
}
.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand img { width: 164px; height: auto; }
.nav { display: flex; gap: 18px; flex-wrap: wrap; }
.nav a {
  color: var(--muted);
  font-weight: 600;
  position: relative;
}
.nav a:hover { color: var(--brand); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff;
  font-weight: 700;
  box-shadow: var(--shadow);
  border: 1px solid transparent;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 44px rgba(0, 113, 227, 0.18);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.68);
  color: var(--brand);
  border: 1px solid rgba(0, 113, 227, 0.12);
  box-shadow: var(--shadow-soft);
}
.btn-small { padding: 12px 16px; font-size: 14px; }
.hero {
  padding: 58px 0 34px;
  background:
    radial-gradient(circle at top right, rgba(0, 113, 227, 0.16), transparent 34%),
    radial-gradient(circle at left top, rgba(128, 196, 255, 0.2), transparent 30%),
    linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 72%, #f2f2f5 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}
.eyebrow {
  color: var(--brand);
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 10px;
  font-size: 12px;
}
h1 {
  font-size: clamp(36px, 5vw, 62px);
  line-height: 1.04;
  margin: 0 0 18px;
  letter-spacing: -0.04em;
  max-width: 12ch;
}
.hero-copy {
  font-size: clamp(17px, 2vw, 21px);
  max-width: 640px;
}
.hero-copy, .section-lead, .card-body p, .text-block p, .article-block p, .faq-item p, .mini-card p {
  color: var(--muted);
}
.hero-actions, .cta-actions, .cta-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.chip-row, .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.chip-row span, .tag-row span {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--muted);
  backdrop-filter: blur(10px);
}
.hero-media img, .thumb img, .detail-gallery img {
  border-radius: 30px;
  box-shadow: var(--shadow);
  background: #fff;
}
.hero-media img {
  min-height: 100%;
  object-fit: cover;
}
.section { padding: 38px 0; }
.section-head {
  margin-bottom: 18px;
}
.section-head h2, .product-block h2 {
  margin: 0 0 8px;
  font-size: clamp(30px, 4vw, 44px);
  letter-spacing: -0.03em;
}
.section-lead {
  max-width: 760px;
  font-size: 17px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.card, .mini-card, .cta-panel, .faq-item, .article-block {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.card {
  overflow: hidden;
  transition: transform 0.28s ease, box-shadow 0.28s ease;
}
.card:hover, .mini-card:hover, .faq-item:hover, .article-block:hover {
  transform: translateY(-4px);
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.12);
}
.card-body { padding: 22px 22px 24px; }
.card-body h3, .mini-card h3, .faq-item h3, .article-block h2 { margin: 0 0 10px; }
.card-body h3 {
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}
.meta {
  margin: 0 0 10px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.icon-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.mini-card, .faq-item, .article-block { padding: 24px; }
.mini-card h3, .faq-item h3 {
  font-size: 20px;
  letter-spacing: -0.02em;
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.gallery-item {
  margin: 0;
  background: var(--card-strong);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 14px;
  box-shadow: var(--shadow-soft);
}
.gallery-item figcaption {
  padding: 12px 4px 4px;
  color: var(--muted);
  font-size: 14px;
}
.detail-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 22px;
  align-items: start;
}
.detail-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.detail-copy, .text-block {
  padding: 26px 28px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(255, 255, 255, 0.96));
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}
.check-list {
  margin: 0;
  padding-left: 20px;
}
.check-list li { margin-bottom: 12px; }
.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-strong);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.spec-table th, .spec-table td {
  text-align: left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}
.spec-table th {
  width: 180px;
  background: linear-gradient(180deg, #f8fbff, #f4f8ff);
}
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.cta-panel {
  padding: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  background:
    radial-gradient(circle at top right, rgba(0, 113, 227, 0.12), transparent 36%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(248, 250, 255, 0.96));
}
.site-footer {
  margin-top: 50px;
  padding: 56px 0 20px;
  background:
    radial-gradient(circle at top left, rgba(0, 113, 227, 0.2), transparent 28%),
    linear-gradient(180deg, #111827 0%, #0b1220 100%);
  color: rgba(255, 255, 255, 0.88);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 24px;
}
.footer-grid h3 {
  margin-top: 0;
  font-size: 20px;
}
.footer-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-list li { margin: 0 0 10px; }
.footer-bottom {
  padding-top: 24px;
  margin-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.64);
}
@media (max-width: 980px) {
  .hero-grid, .detail-grid, .footer-grid, .cta-panel {
    grid-template-columns: 1fr;
  }
  .card-grid, .icon-grid, .gallery-grid, .faq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  h1 {
    max-width: none;
  }
}
@media (max-width: 680px) {
  .header-inner, .nav {
    flex-direction: column;
    align-items: flex-start;
  }
  .card-grid, .icon-grid, .gallery-grid, .faq-grid {
    grid-template-columns: 1fr;
  }
  .section-head h2, .product-block h2 { font-size: 28px; }
  .detail-copy, .text-block, .mini-card, .faq-item, .article-block {
    padding: 20px;
  }
}