:root {
  color-scheme: light;
  --ink: #17252b;
  --muted: #60727a;
  --paper: #f5f8f7;
  --surface: #ffffff;
  --line: #d9e2e5;
  --accent: #176b66;
  --accent-dark: #0f4d4a;
  --warm: #b3652a;
}

* { box-sizing: border-box; }
img, svg, video, canvas { max-width: 100%; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 15px/1.65 system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; overflow-wrap: break-word; }
a { color: inherit; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; max-width: 1180px; margin: 0 auto; padding: 22px 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 7px; background: var(--accent); color: #fff; font-weight: 800; letter-spacing: 0; }
.brand-name { display: grid; line-height: 1.15; }
.brand-title { font-weight: 800; font-size: 18px; }
.brand-subtitle { color: var(--muted); font-size: 12px; }
.language { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.language select { border: 1px solid var(--line); border-radius: 4px; background: var(--surface); padding: 6px 8px; color: var(--ink); font: inherit; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 28px 70px; }
.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr); align-items: center; gap: 56px; padding: 70px 0 76px; }
.eyebrow { margin: 0 0 14px; color: var(--accent); font-size: 13px; font-weight: 750; letter-spacing: .04em; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 760px; margin-bottom: 18px; font-size: clamp(34px, 5vw, 62px); line-height: 1.08; letter-spacing: 0; }
.lead { max-width: 680px; color: var(--muted); font-size: 18px; }
.hero-media { margin: 0; }
.hero-media img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 7px; box-shadow: 0 18px 45px rgba(23, 37, 43, .12); }
.hero-media figcaption { margin-top: 9px; color: var(--muted); font-size: 12px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 8px 15px; border: 1px solid var(--accent); border-radius: 4px; background: var(--accent); color: #fff; text-decoration: none; font-weight: 700; }
.button.secondary { background: var(--surface); color: var(--accent); }
.button.disabled { border-color: var(--line); background: #e9eeee; color: var(--muted); cursor: default; }
.status-band { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface); }
.status-inner { display: flex; align-items: center; gap: 10px; max-width: 1180px; margin: 0 auto; padding: 15px 28px; }
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: #2c9a68; box-shadow: 0 0 0 4px rgba(44, 154, 104, .13); }
.status-detail { color: var(--muted); }
.section { padding: 70px 0 0; }
.section-header { max-width: 760px; margin-bottom: 26px; }
.section h2 { margin-bottom: 10px; font-size: 30px; line-height: 1.2; }
.section-intro { color: var(--muted); }
.product-grid, .feature-grid, .update-grid, .download-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.product-card, .feature-card, .update-card, .download-card { min-width: 0; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); padding: 22px; }
.product-card { display: flex; min-height: 220px; flex-direction: column; justify-content: space-between; text-decoration: none; transition: border-color .18s ease, transform .18s ease; }
.product-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.product-label { color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
.product-card h3 { margin: 12px 0 8px; font-size: 23px; }
.product-card p, .feature-card p, .update-card p, .download-card p { margin-bottom: 0; color: var(--muted); }
.product-meta { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 20px; color: var(--muted); font-size: 12px; }
.badge { display: inline-flex; border: 1px solid #b9d8ca; border-radius: 999px; padding: 2px 8px; color: #28704d; background: #eff8f2; }
.feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.feature-card h3, .update-card h3, .download-card h3 { margin-bottom: 8px; font-size: 18px; }
.update-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.update-index { display: block; margin-bottom: 17px; color: var(--warm); font-size: 13px; font-weight: 800; }
.download-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.download-card .button { margin-top: 18px; }
.download-meta { display: block; margin-top: 10px; color: var(--muted); font-size: 13px; overflow-wrap: anywhere; word-break: break-word; }
.notice { border-left: 3px solid var(--warm); background: #fffaf4; padding: 18px 20px; color: #70451e; }
.footer { display: flex; justify-content: space-between; gap: 20px; max-width: 1180px; margin: 70px auto 0; padding: 22px 28px 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.beian { color: var(--muted); text-decoration: none; white-space: nowrap; }
@media (max-width: 840px) {
  .hero { grid-template-columns: 1fr; gap: 30px; padding: 52px 0 60px; }
  .product-grid, .feature-grid, .update-grid, .download-grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .site-header { padding: 17px 18px; }
  .container { padding: 0 18px 48px; }
  .hero { grid-template-columns: 1fr; gap: 30px; padding: 46px 0 54px; }
  h1 { font-size: 40px; }
  .lead { font-size: 16px; }
  .status-inner { align-items: flex-start; flex-wrap: wrap; padding: 13px 18px; }
  .status-detail { flex-basis: 100%; margin-left: 19px; }
  .product-grid, .feature-grid, .update-grid, .download-grid { grid-template-columns: 1fr; }
  .section { padding-top: 52px; }
  .footer { display: block; margin-top: 48px; padding: 20px 18px 28px; }
  .beian { display: inline-block; margin-top: 8px; }
}