/* 原生静态页面，延续 App 朱砂红品牌。DESIGN_VARIANCE: 4;
   MOTION_INTENSITY: 2; VISUAL_DENSITY: 4。可信、克制的下载入口。
   圆角：按钮/图标 12px，截图 24px。层级：仅跳转链接使用 z-index: 1。 */
:root {
  color-scheme: light dark;
  --background: #fafafa;
  --surface: #f0f0f2;
  --text: #202126;
  --muted: #60616b;
  --line: #dcdce1;
  --accent: #e11d48;
  --accent-hover: #c5163d;
  --tint: #fce9ee;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  scroll-behavior: smooth;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--background); color: var(--text); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 5px; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 6px; }
[hidden] { display: none !important; }
.wrap { width: min(1120px, calc(100% - 80px)); margin-inline: auto; }
.skip-link { position: absolute; top: -80px; left: 24px; padding: 14px; background: var(--background); z-index: 1; }
.skip-link:focus { top: 12px; }
.site-header { height: 80px; display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 700; font-size: 20px; text-decoration: none; white-space: nowrap; }
.brand img { border-radius: 10px; }
.site-header nav { display: flex; gap: 32px; font-size: 14px; }
.site-header nav a, .site-footer nav a { text-decoration: none; }
.site-header nav a:hover, .site-footer nav a:hover { color: var(--accent); text-decoration: underline; }
.hero { min-height: 600px; padding-block: 48px 32px; display: grid; grid-template-columns: 1.15fr 1fr; align-items: center; gap: 64px; }
.eyebrow { margin: 0 0 24px; font-size: 14px; font-weight: 600; color: var(--muted); }
h1 { font-size: clamp(36px, 4.3vw, 56px); line-height: 1.3; letter-spacing: -2px; font-weight: 700; margin: 0; }
h1 span { display: block; }
.intro { color: var(--muted); font-size: 17px; line-height: 1.9; margin: 24px 0 32px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { min-height: 56px; border: 1px solid var(--accent); padding: 16px 21px; border-radius: 12px; display: inline-flex; align-items: center; justify-content: center; gap: 22px; font-size: 15px; font-weight: 600; text-decoration: none; white-space: nowrap; transition: transform .15s, background-color .15s; cursor: pointer; }
.button-primary { color: #fff; background: var(--accent); }
.button-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.button-secondary { color: var(--text); border-color: var(--line); background: var(--background); }
.button-secondary:hover { background: var(--surface); }
.button:active { transform: translateY(1px); }
.product-view { margin: 0; background: var(--tint); border-radius: 24px; min-height: 520px; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 28px 24px 18px; }
.screenshot-frame { width: 238px; border: 6px solid #29292e; border-radius: 24px; overflow: hidden; box-shadow: 0 18px 36px #8d354722; background: #f3f4f6; }
.screenshot-frame img { display: block; width: 100%; height: auto; }
.product-view figcaption { padding-top: 18px; color: var(--muted); font-size: 12px; }
.download-note { padding: 18px 0 32px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.download-note p { margin: 4px 0; }
.download-note [role="status"]:empty { display: none; }
.download-note [role="status"] { color: var(--text); font-weight: 500; }
.download-note a { color: var(--text); }
.features { padding-block: 80px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr; gap: 100px; }
h2 { font-size: clamp(28px, 3vw, 36px); letter-spacing: -1px; line-height: 1.45; margin: 0 0 20px; }
.section-heading p { font-size: 15px; line-height: 1.8; color: var(--muted); }
.feature-list { display: grid; gap: 30px; }
h3 { margin: 0 0 10px; font-size: 18px; }
.feature-list p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.9; max-width: 40ch; }
.install-section { padding: 52px 56px; background: var(--surface); border-radius: 24px; display: grid; grid-template-columns: 1fr auto; gap: 48px; align-items: center; }
.install-copy > p { font-size: 15px; line-height: 1.8; color: var(--muted); max-width: 34ch; }
.package-info { margin-top: 28px; }
.package-info > a { font-weight: 600; font-size: 16px; }
.package-info > a span { margin-left: 10px; }
.package-info p { color: var(--muted); font-size: 12px; line-height: 1.7; }
.package-info details { margin-top: 16px; font-size: 12px; color: var(--muted); }
.package-info summary { cursor: pointer; }
.package-info code { display: block; margin-top: 12px; overflow-wrap: anywhere; max-width: 48ch; line-height: 1.8; user-select: all; }
.qr-block { margin: 0; text-align: center; }
.qr-block img { display: block; border-radius: 12px; background: #fff; }
.qr-block figcaption { font-size: 13px; padding-top: 16px; color: var(--muted); }
.faq { padding-block: 96px; }
.faq h2 { margin-bottom: 32px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { padding: 23px 32px 23px 0; cursor: pointer; font-size: 16px; font-weight: 500; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; font-size: 22px; line-height: 1; font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { max-width: 70ch; margin: 0; padding: 0 30px 24px 0; font-size: 14px; line-height: 1.9; color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); padding-block: 32px; display: grid; grid-template-columns: 1fr auto; gap: 20px; }
.site-footer .brand { font-size: 17px; }
.site-footer p { font-size: 12px; color: var(--muted); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 20px; font-size: 12px; padding-top: 8px; }
.site-footer .copyright { grid-column: 1 / -1; margin: 0; }
.policy-index { padding-block: 72px 96px; }
.policy-options { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; padding-block: 28px 40px; }
.policy-options article { border-top: 1px solid var(--line); padding-top: 28px; }
.policy-options h2 { font-size: 23px; letter-spacing: 0; }
.policy-options p,.policy-contact { color: var(--muted); font-size: 15px; line-height: 1.9; }
.policy-options a { display: inline-block; margin-top: 12px; font-size: 15px; font-weight: 600; }
.policy-contact { max-width: 65ch; }
@media (prefers-color-scheme: dark) {
  :root { --background: #19191d; --surface: #242429; --text: #f2f2f4; --muted: #b2b2bd; --line: #3f3f48; --tint: #302027; }
}
@media (max-width: 1024px) {
  .hero { gap: 36px; grid-template-columns: 1.2fr 1fr; }
  .button { padding-inline: 16px; gap: 12px; }
  .features { gap: 48px; }
}
@media (max-width: 767px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { height: 72px; gap: 12px; }
  .brand { font-size: 18px; gap: 9px; }
  .brand img { width: 34px; height: 34px; }
  .site-header nav { gap: 16px; font-size: 12px; }
  .site-header nav a:first-child { display: none; }
  .hero { padding-block: 36px 12px; grid-template-columns: 1fr; gap: 36px; min-height: auto; }
  .eyebrow { margin-bottom: 20px; font-size: 13px; }
  h1 { font-size: clamp(32px, 8.2vw, 42px); letter-spacing: -1.5px; }
  .intro { font-size: 15px; margin-block: 20px 26px; }
  .desktop-break { display: none; }
  .actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .button { padding: 15px 12px; font-size: 13px; min-height: 52px; gap: 10px; }
  .product-view { min-height: 0; padding: 28px 20px 16px; }
  .screenshot-frame { width: min(228px, 100%); }
  .download-note { padding-block: 16px 36px; font-size: 12px; }
  .features { padding-block: 48px; grid-template-columns: 1fr; gap: 32px; }
  .feature-list { gap: 24px; }
  .feature-list p { max-width: none; font-size: 14px; }
  .install-section { padding: 28px 24px; grid-template-columns: 1fr; gap: 30px; }
  .qr-block { justify-self: start; }
  .qr-block img { width: 160px; height: 160px; }
  .faq { padding-block: 56px; }
  .faq summary { font-size: 15px; line-height: 1.7; padding-block: 20px; }
  .site-footer { grid-template-columns: 1fr; gap: 12px; padding-block: 26px; }
  .site-footer nav { gap: 18px; padding-block: 8px 12px; }
  .policy-index { padding-block: 44px 56px; }
  .policy-options { grid-template-columns: 1fr; gap: 32px; padding-top: 12px; }
}
@media (max-width: 359px) {
  .site-header nav { gap: 10px; }
  .brand { font-size: 16px; }
  .button { padding-inline: 8px; font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  .button { transition: none; }
}