/* 有多快 · 官网样式。颜色与 App 一致：琥珀色强调、深灰文字，自动适配深色模式 */
:root {
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --card: #ffffff;
  --ink: #2f2f33;
  --ink-2: #6b6b72;
  --line: #e5e5ea;
  --accent: #dea331;
  --accent-ink: #8a5d0a;  /* 链接与图标：白底 5.8:1、浅灰底 5.3:1，满足 WCAG AA */
  --bezel: #1c1c1e;
  --icon-ring: rgba(0, 0, 0, 0.1);
  --shadow: 0 24px 60px rgba(20, 20, 30, 0.14);
  --radius: 20px;
  --max: 1080px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0f;
    --bg-soft: #17171a;
    --card: #1c1c1f;
    --ink: #f2f2f4;
    --ink-2: #a3a3aa;
    --line: #2c2c31;
    --accent: #e8b44a;
    --accent-ink: #e8b44a;
    --bezel: #3a3a3e;
    --icon-ring: rgba(255, 255, 255, 0.14);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); }
img { max-width: 100%; height: auto; display: block; }
picture { display: contents; }
a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* 顶部导航 */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 10; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 600; font-size: 17px; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 7px; box-shadow: 0 0 0 1px var(--icon-ring); }
.nav { display: flex; gap: 20px; font-size: 15px; }
.nav a { color: var(--ink-2); }
.nav a:hover { color: var(--ink); text-decoration: none; }

/* 首屏 */
.hero { padding: 56px 0 48px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero-icon { width: 88px; height: 88px; border-radius: 20px; box-shadow: 0 0 0 1px var(--icon-ring), 0 8px 24px rgba(0, 0, 0, 0.15); }
.hero h1 { font-size: 52px; line-height: 1.15; margin: 24px 0 12px; letter-spacing: -0.5px; }
.hero .lead { font-size: 20px; color: var(--ink-2); margin: 0 0 32px; max-width: 30em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 50px; padding: 0 26px; border-radius: 999px; font-size: 17px; font-weight: 600;
  /* 琥珀底配深色字：浅色 6.0:1、深色模式 7.0:1；白字在琥珀底上只有约 2:1 */
  background: var(--accent); color: #2f2f33;
}
.btn:hover { text-decoration: none; filter: brightness(1.05); }
.btn.is-soon { cursor: default; }
.btn.is-soon:hover { filter: none; }
.btn svg { width: 20px; height: 20px; }
.cta-note { font-size: 14px; color: var(--ink-2); }

/* 手机截图 */
.phone {
  border-radius: 46px; border: 10px solid var(--bezel); background: var(--bezel);
  box-shadow: var(--shadow); overflow: hidden; max-width: 320px; margin: 0 auto;
}
.phone img { border-radius: 36px; }
.hero .phone { max-width: 290px; }
.phone.landscape { max-width: 560px; border-radius: 40px; }
.phone.landscape img { border-radius: 30px; }

/* 区块 */
section { padding: 72px 0; }
section.soft { background: var(--bg-soft); }
.section-title { font-size: 34px; line-height: 1.25; margin: 0 0 12px; text-align: center; }
.section-lead { color: var(--ink-2); text-align: center; margin: 0 auto 48px; max-width: 34em; font-size: 17px; }
.section-lead a { white-space: nowrap; }
.section-lead:last-child { margin-bottom: 0; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.feature .icon {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(222, 163, 49, 0.14); color: var(--accent-ink); margin-bottom: 16px;
}
.feature .icon svg { width: 24px; height: 24px; }
.feature h3 { margin: 0 0 6px; font-size: 18px; }
.feature p { margin: 0; color: var(--ink-2); font-size: 15px; }

.showcase { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; align-items: start; }
.showcase figure { margin: 0; }
.showcase figcaption { text-align: center; color: var(--ink-2); font-size: 15px; margin-top: 18px; }
.showcase .wide { grid-column: span 3; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split h2 { font-size: 30px; margin: 0 0 12px; line-height: 1.3; }
.split p { color: var(--ink-2); font-size: 17px; margin: 0 0 12px; }
.checks { list-style: none; padding: 0; margin: 20px 0 0; }
.checks li { position: relative; padding-left: 28px; margin: 10px 0; }
.checks li::before {
  content: ""; position: absolute; left: 4px; top: 0.55em; width: 12px; height: 7px;
  border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg);
}

.price { text-align: center; }
.split .price .amount { font-size: 44px; font-weight: 700; margin: 8px 0 4px; color: var(--ink); }
.price .amount small { font-size: 18px; font-weight: 500; color: var(--ink-2); }

/* 文档页（隐私政策 / 用户协议 / 技术支持） */
.doc { max-width: 760px; margin: 0 auto; padding: 48px 20px 80px; }
.doc h1 { font-size: 34px; line-height: 1.25; margin: 0 0 8px; }
.doc .meta { color: var(--ink-2); font-size: 14px; margin: 0 0 32px; }
.doc h2 { font-size: 21px; margin: 40px 0 10px; }
.doc h3 { font-size: 17px; margin: 24px 0 6px; }
.doc p, .doc li { font-size: 16px; }
.doc ul, .doc ol { padding-left: 1.4em; }
.doc li { margin: 6px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 15px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.doc th { background: var(--bg-soft); font-weight: 600; }
.doc .summary { background: var(--bg-soft); border-radius: 14px; padding: 18px 22px; margin: 0 0 8px; }
.doc .summary p { margin: 6px 0; }
.doc details { border: 1px solid var(--line); border-radius: 14px; padding: 14px 18px; margin: 12px 0; background: var(--card); }
.doc summary { cursor: pointer; font-weight: 600; font-size: 16px; }
.doc details p, .doc details ul { margin: 10px 0 0; color: var(--ink-2); }
.contact-card { background: var(--bg-soft); border-radius: 18px; padding: 24px; margin: 24px 0; }
.contact-card p { margin: 4px 0; }

/* 占位文字：上线前替换，替换后此样式不再生效 */
.todo { background: #fff3c4; color: #8a5a00; border-radius: 4px; padding: 0 4px; }
@media (prefers-color-scheme: dark) { .todo { background: #4a3a10; color: #ffd978; } }

/* 页脚 */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0 40px; font-size: 14px; color: var(--ink-2); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 16px; }
.site-footer a { color: var(--ink-2); }

/* 手机宽度 */
@media (max-width: 860px) {
  .hero { padding: 40px 0 32px; }
  .hero .wrap, .split { grid-template-columns: 1fr; gap: 36px; }
  .hero .wrap { text-align: center; }
  .hero-icon { margin: 0 auto; }
  .hero .lead { margin-left: auto; margin-right: auto; }
  .cta { justify-content: center; }
  .hero h1 { font-size: 40px; }
  .features { grid-template-columns: 1fr; }
  .showcase { grid-template-columns: 1fr; gap: 40px; }
  .showcase .wide { grid-column: auto; }
  section { padding: 56px 0; }
  .section-title { font-size: 28px; }
  .nav { gap: 14px; font-size: 14px; }
  .nav .hide-mobile { display: none; }
}