:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --card: #fff;
  --text: #1a1d24;
  --subtext: #5b6475;
  --line: #dfe4ec;
  --brand: #2b6ff7;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 14px; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
a:focus-visible { outline: 3px solid var(--brand); outline-offset: 5px; }
.skip-link { position: absolute; left: 20px; top: -80px; padding: 12px 20px; background: var(--brand); color: white; border-radius: 8px; z-index: 20; }
.skip-link:focus { top: 12px; }
.site-header { height: 82px; border-bottom: 1px solid var(--line); background: var(--card); }
.header-inner { width: min(1120px, calc(100% - 80px)); height: 100%; margin: auto; display: flex; align-items: center; }
.brand { display: inline-flex; align-items: center; gap: 12px; border-radius: 5px; }
.brand img { display: block; }
.brand-text { display: flex; flex-direction: column; gap: 5px; }
.brand-text strong { font-size: 16px; font-weight: 650; letter-spacing: 1px; line-height: 1.3; }
.brand-text > span { color: #7a879b; font-family: Arial, sans-serif; font-size: 9px; font-weight: 600; letter-spacing: 2.2px; }
.workspace { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
.hero { min-height: 289px; display: flex; align-items: center; justify-content: space-between; gap: 16px; position: relative; }
.hero::before { content: ""; position: absolute; z-index: -1; inset: 0 -40px; background: radial-gradient(ellipse at 80% 35%, #eaf1fe 0, transparent 63%); pointer-events: none; }
.hero-copy { flex: 1; padding: 36px 0; }
.eyebrow { display: flex; align-items: center; gap: 8px; margin: 0 0 17px; color: #577398; font-size: 12px; letter-spacing: 2px; }
.eyebrow > span { width: 6px; height: 6px; background: var(--brand); border-radius: 50%; box-shadow: 0 0 0 4px #e7eeff; }
h1 { margin: 0; font-size: clamp(30px, 3.15vw, 42px); line-height: 1.4; font-weight: 700; letter-spacing: -.8px; }
.hero-description { margin: 15px 0 0; color: var(--subtext); line-height: 1.85; font-size: 15px; }
.hero-topics { display: flex; align-items: center; gap: 14px; margin-top: 24px; color: #7b8798; font-size: 12px; }
.hero-topics i { width: 3px; height: 3px; border-radius: 50%; background: #b9c4d3; }
.hero-visual { width: 39%; height: auto; flex-shrink: 0; margin-right: -12px; }
.mobile-break { display: none; }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin: 8px 0 22px; }
.section-title { display: flex; align-items: center; gap: 11px; }
.section-marker { width: 3px; height: 17px; background: var(--brand); border-radius: 2px; }
.section-title h2 { margin: 0; font-size: 18px; font-weight: 650; }
.section-english { font-family: Arial, sans-serif; font-size: 10px; letter-spacing: 1.7px; color: #8b97a8; margin-left: 2px; }
.section-heading > p { margin: 0; color: #7c8798; font-size: 12px; }
.module-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.product-workspace-section { margin-top: 42px; }
.tone-blue { --accent: #2b6ff7; --tint: #edf3ff; --hover-border: #b9cff9; }
.tone-teal { --accent: #218c8a; --tint: #eaf6f4; --hover-border: #a9d7d2; }
.tone-indigo { --accent: #7060bd; --tint: #f1eefb; --hover-border: #c9bfea; }
.tone-amber { --accent: #ac7b31; --tint: #faf3e7; --hover-border: #dfc99f; }
.module-card { min-width: 0; display: flex; flex-direction: column; position: relative; background: var(--card); border: 1px solid #e2e7ef; border-radius: 14px; padding: 25px 27px 21px; box-shadow: 0 2px 4px #26385602; transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease; }
.module-card:hover { transform: translateY(-3px); border-color: var(--hover-border); box-shadow: 0 10px 28px #304d7b0b; }
.card-top { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.module-icon { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 12px; color: var(--accent); background: var(--tint); flex-shrink: 0; }
.module-icon svg { width: 24px; height: 24px; }
.module-number { font-family: Arial, sans-serif; color: #98a2b3; font-size: 10px; letter-spacing: 1.5px; }
.module-card h3 { margin: 19px 0 10px; font-size: 22px; line-height: 1.4; font-weight: 650; letter-spacing: .5px; }
.module-card > p { margin: 0; color: var(--subtext); line-height: 1.9; font-size: 13px; }
.card-bottom { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 23px; padding-top: 18px; border-top: 1px solid #eff1f5; }
.module-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.module-tags > span { background: #f6f8fa; border-radius: 4px; padding: 4px 7px; font-size: 10px; line-height: 1.5; color: #788397; white-space: nowrap; }
.module-action { display: inline-flex; align-items: center; gap: 8px; color: var(--accent); font-size: 12px; font-weight: 500; white-space: nowrap; }
.module-action svg { width: 17px; height: 17px; transition: transform 180ms ease; }
.module-card:hover .module-action svg { transform: translateX(3px); }
.workspace-note { display: flex; align-items: center; gap: 10px; margin-top: 24px; padding: 17px 20px; border: 1px solid #e6eaf1; border-radius: 10px; background: #f1f4f8; color: #738198; }
.note-icon { display: flex; color: #8295af; }
.note-icon svg { width: 19px; height: 19px; }
.workspace-note p { margin: 0; font-size: 12px; }
.preview-label { margin-left: auto; font-size: 11px; color: #8792a3; }
.site-footer { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 9px; padding: 30px 20px; font-size: 10px; letter-spacing: 1px; color: #929cac; }
.site-footer > span:last-child { font-family: Arial, sans-serif; font-size: 9px; letter-spacing: 1.4px; }
.footer-dot { color: #bbc3ce; }

/* 模块说明页：为首版首页提供可返回、可直接访问的落点。 */
.detail-workspace { min-height: calc(100svh - 160px); padding-top: 32px; }
.breadcrumb { display: flex; align-items: center; gap: 10px; margin-bottom: 30px; color: #7c8798; font-size: 12px; }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb svg { width: 13px; height: 13px; }
.detail-card { max-width: 850px; margin: 0 auto 48px; padding: 40px; border: 1px solid var(--line); background: white; border-radius: 16px; }
.detail-top { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.detail-top .module-icon { width: 56px; height: 56px; border-radius: 15px; }
.status-label { color: #7a6b48; background: #faf5e9; font-size: 12px; padding: 6px 10px; border-radius: 5px; }
.detail-card h1 { font-size: 32px; }
.detail-intro { color: var(--subtext); font-size: 15px; line-height: 1.9; margin: 16px 0 28px; }
.feature-list { list-style: none; padding: 0; margin: 0 0 30px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.feature-list li { padding: 20px 16px; border: 1px solid #e8edf4; border-radius: 10px; background: #fafbfd; }
.feature-list h2 { margin: 0 0 10px; color: var(--text); font-size: 15px; font-weight: 600; }
.feature-list p { margin: 0; font-size: 12px; color: var(--subtext); line-height: 1.85; }
.detail-note { border-left: 3px solid #cddbf4; padding: 2px 0 2px 14px; margin-bottom: 28px; color: #788397; font-size: 12px; line-height: 1.9; }
.back-link { display: inline-flex; align-items: center; gap: 8px; background: var(--brand); color: white; border-radius: 8px; padding: 11px 17px; font-size: 13px; }
.back-link:hover { background: #215ed5; }
.back-link svg { width: 17px; height: 17px; }
[hidden] { display: none !important; }

@media (min-width: 1440px) {
  .hero { min-height: 300px; }
}
@media (max-width: 1000px) {
  .header-inner { width: calc(100% - 48px); }
  .workspace { padding-left: 24px; padding-right: 24px; }
  .hero::before { left: -24px; right: -24px; }
  .hero-visual { width: 35%; margin-right: 0; }
  .hero { min-height: 270px; }
  .module-card { padding: 23px 22px 20px; }
  .module-tags { gap: 4px; }
  .module-tags > span { padding: 3px 5px; }
  .card-bottom { gap: 8px; }
}
@media (max-width: 760px) {
  .site-header { height: 74px; }
  .header-inner { width: calc(100% - 40px); }
  .workspace { padding-left: 20px; padding-right: 20px; }
  .brand img { width: 36px; height: 36px; }
  .brand-text strong { font-size: 14px; }
  .brand-text > span { font-size: 8px; }
  .hero { min-height: 256px; }
  .hero-copy { padding: 32px 0; }
  .hero::before { left: -20px; right: -20px; }
  .hero-visual { position: absolute; right: -10px; bottom: 5px; width: 230px; opacity: .16; z-index: -1; }
  h1 { font-size: clamp(25px, 5.4vw, 36px); letter-spacing: -.7px; }
  .hero-description { font-size: 13px; }
  .hero-topics { margin-top: 20px; font-size: 11px; }
  .module-grid { gap: 16px; }
  .module-card { padding: 20px 18px; }
  .module-number { font-size: 8px; letter-spacing: .7px; }
  .module-card h3 { font-size: 20px; }
  .module-card > p { font-size: 12px; }
  .desktop-break { display: none; }
  .card-bottom { align-items: flex-start; flex-direction: column; gap: 15px; }
  .module-action { align-self: flex-end; }
  .section-heading { margin-top: 0; margin-bottom: 17px; }
  .section-title h2 { font-size: 17px; }
  .section-heading > p { font-size: 11px; }
  .section-english { display: none; }
  .workspace-note { flex-wrap: wrap; gap: 9px; padding: 14px; }
  .preview-label { width: 100%; margin-left: 28px; font-size: 10px; }
  .detail-workspace { padding-top: 24px; }
  .detail-card { padding: 26px 22px; }
  .feature-list { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .module-grid { grid-template-columns: 1fr; }
  .module-card { padding: 22px; }
  .module-number { font-size: 10px; letter-spacing: 1px; }
  .module-card h3 { margin-top: 16px; }
  .module-card > p { font-size: 13px; }
  .card-bottom { flex-direction: row; align-items: center; margin-top: 21px; gap: 12px; }
  .module-action { align-self: auto; font-size: 11px; gap: 5px; }
  .module-tags > span { font-size: 9px; }
  .mobile-break { display: inline; }
  .hero { min-height: 266px; }
  .eyebrow { font-size: 11px; }
  .hero-description { line-height: 1.95; }
  .hero-visual { width: 200px; bottom: 0; }
  .site-footer { padding-top: 25px; font-size: 9px; }
}
@media (max-width: 360px) {
  .workspace { padding-left: 16px; padding-right: 16px; }
  .hero::before { left: -16px; right: -16px; }
  .module-card { padding: 18px; }
  .card-bottom { gap: 8px; }
  .module-tags > span { padding: 3px 4px; }
  .section-heading > p { font-size: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
  .module-card:hover, .module-card:hover .module-action svg { transform: none; }
}