/* 首页使用系统中文字体，避免首屏下载 17 MB 的全量字体。 */
.landing-page { --font-body: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif; }
.landing-header { gap: 24px; }
.landing-nav { display: flex; align-items: center; gap: 28px; font-size: 13px; color: var(--color-muted); }
.landing-nav a:hover, .landing-main .plain-link:hover { color: var(--color-primary); }
.landing-account { flex-wrap: nowrap; font-size: 13px; gap: 16px; }
html:not([data-ready]) .landing-account [data-action=theme] { visibility: hidden; }
.landing-hero { grid-template-columns: 1fr 1.05fr; gap: 48px; padding: 28px 0 60px; }
.landing-hero h1 { font-size: clamp(38px, 4.7vw, 62px); letter-spacing: .01em; line-height: 1.32; }
.landing-hero .hero-copy { font-size: 15px; line-height: 1.95; max-width: 420px; }
.landing-art { min-width: 0; display: grid; place-items: center; }
.landing-art img { display: block; width: 100%; height: auto; max-width: 540px; max-height: none; aspect-ratio: 1; object-fit: contain; animation: none; filter: drop-shadow(0 18px 18px #537bac18); }
.landing-demo { margin-top: 18px; font-size: 11px; }
.landing-section { margin-top: 48px; scroll-margin-top: 24px; }
.landing-section h2 { font-size: 25px; }
.landing-section .plan h3 { font-size: 20px; }
.landing-section .plan p { font-size: 13px; }
.landing-section.steps > .grid { margin-top: 0; }
.landing-main .plain-link { font-size: 13px; color: var(--color-primary); }
.landing-faq .card { padding: 8px 26px; }
.landing-faq details + details { border-top: 1px solid var(--color-border); }
.landing-faq summary { display: flex; justify-content: space-between; gap: 20px; cursor: pointer; list-style: none; padding: 20px 0; font-weight: 500; }
.landing-faq summary::-webkit-details-marker { display: none; }
.landing-faq summary span { color: var(--color-primary); flex-shrink: 0; transition: transform .2s; }
.landing-faq details[open] summary span { transform: rotate(45deg); }
.landing-faq details p { padding: 0 26px 22px 0; color: var(--color-muted); font-size: 13px; line-height: 1.9; }
.landing-faq.card, .landing-faq .card { transform: none; }
.skip-link { position: absolute; top: 8px; left: 20px; translate: 0 -160%; z-index: 100; padding: 10px 16px; background: var(--color-surface); border: 1px solid var(--color-primary); border-radius: 10px; }
.skip-link:focus { translate: 0 0; }
@media (max-width: 900px) {
  .landing-nav { gap: 16px; }
  .landing-hero { gap: 24px; }
  .landing-section .cols3 { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 600px) {
  .landing-header { flex-wrap: wrap; gap: 15px; padding-bottom: 0; }
  .landing-nav { order: 3; width: 100%; justify-content: center; gap: 30px; padding: 12px 0; border-top: 1px solid var(--color-border); }
  .landing-header .brand { font-size: 21px; gap: 8px; }
  .landing-header .brand img { width: 30px; height: 30px; }
  .landing-header .landing-account { gap: 10px; }
  .landing-account .btn { padding: 8px 12px; }
  .landing-account .btn.ghost { padding: 6px; }
  .landing-hero { grid-template-columns: minmax(0, 1fr); gap: 12px; padding: 24px 0 0; }
  .landing-hero h1 { font-size: 42px; margin: 17px 0; }
  .landing-hero .hero-copy { font-size: 14px; }
  .landing-art img { width: min(100%, 340px); }
  .landing-hero .hero-actions { margin-top: 22px; gap: 10px; }
  .landing-section { margin-top: 32px; }
  .landing-section h2 { font-size: 22px; }
  .landing-faq .card { padding: 0 20px; }
  .landing-faq summary { font-size: 13px; gap: 12px; }
  .landing-faq details p { padding-right: 0; }
  .landing-main .footer { font-size: 11px; gap: 16px; }
}