:root {
  --primary: #F97316;
  --primary-hover: #EA580C;
  --primary-soft: #FFF7ED;
  --primary-soft2: #FFEDD5;
  --ink: #1C1917;
  --ink-2: #57534E;
  --line: #E7E5E4;
  --bg: #FFFFFF;
  --bg-2: #FAFAF9;
  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 28px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .06);
  --shadow-sm: 0 4px 14px rgba(0, 0, 0, .05);
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

a { color: inherit; text-decoration: none; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 12px 22px; border-radius: 999px;
  font-weight: 600; font-size: 15px; cursor: pointer;
  border: 1px solid transparent; transition: transform .12s ease, background .2s ease, box-shadow .2s ease;
}
.btn:active { transform: scale(.98); }
.btn--primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(249, 115, 22, .28); }
.btn--primary:hover { background: var(--primary-hover); }
.btn--ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn--lg { padding: 15px 30px; font-size: 17px; }

/* ---------- 顶栏 ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; }
.brand__mark { display: inline-flex; }
.brand__name { font-size: 17px; letter-spacing: .2px; }
.nav__cta { padding: 8px 18px; font-size: 14px; }

/* ---------- Hero ---------- */
.hero {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center;
  padding: 64px 20px 48px;
}
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .4px;
  color: var(--primary); background: var(--primary-soft); padding: 5px 12px; border-radius: 999px;
}
.hero__title { font-size: clamp(34px, 6vw, 56px); line-height: 1.1; margin: 16px 0 14px; font-weight: 800; letter-spacing: -.5px; }
.hero__lead { color: var(--ink-2); font-size: 17px; max-width: 30em; margin: 0 0 26px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
.hero__meta { color: var(--ink-2); font-size: 14px; margin: 0; }
.hero__visual { display: flex; justify-content: center; }
.phone { width: 260px; max-width: 78vw; height: auto; filter: drop-shadow(0 24px 40px rgba(249, 115, 22, .18)); animation: float 6s ease-in-out infinite; }

/* ---------- 信任微条 ---------- */
.trust {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; margin-top: 8px;
}
.trust__item { text-align: center; }
.trust__item strong { display: block; font-size: 16px; }
.trust__item span { color: var(--ink-2); font-size: 14px; }

/* ---------- 通用区块标题 ---------- */
.section__title { font-size: clamp(24px, 4vw, 34px); font-weight: 800; text-align: center; margin: 72px 0 32px; letter-spacing: -.3px; }

/* ---------- 特性卡片 ---------- */
.features__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card__icon {
  display: inline-flex; width: 52px; height: 52px; border-radius: 14px;
  background: var(--primary-soft); align-items: center; justify-content: center; margin-bottom: 14px;
}
.card__icon svg { width: 30px; height: 30px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--ink-2); font-size: 15px; }

/* ---------- 三步 ---------- */
.steps__list { list-style: none; counter-reset: step; padding: 0; margin: 0; display: grid; gap: 14px; }
.step { display: flex; align-items: center; gap: 18px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 24px; }
.step__num {
  flex: none; width: 40px; height: 40px; border-radius: 50%; background: var(--primary); color: #fff;
  display: inline-flex; align-items: center; justify-content: center; font-weight: 700; font-size: 18px;
}
.step h3 { margin: 0 0 2px; font-size: 17px; }
.step p { margin: 0; color: var(--ink-2); font-size: 14px; }

/* ---------- 下载 CTA ---------- */
.cta { margin: 72px 0; }
.cta__inner {
  display: grid; grid-template-columns: 1.2fr .8fr; gap: 36px; align-items: center;
  background: linear-gradient(135deg, var(--primary-soft), var(--primary-soft2));
  border: 1px solid var(--primary-soft2); border-radius: var(--radius-lg); padding: 48px;
}
.cta__text h2 { font-size: clamp(24px, 4vw, 34px); margin: 0 0 10px; font-weight: 800; }
.cta__text p { color: var(--ink-2); margin: 0 0 22px; }
.cta__hint { font-size: 13px; color: var(--ink-2); margin: 14px 0 0; }
.cta__qr { display: flex; justify-content: center; }
.qr-card { background: #fff; border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); text-align: center; }
.qr-box { width: 200px; height: 200px; background: #fff; border-radius: 12px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.qr-box svg, .qr-box img { width: 100%; height: 100%; display: block; }
.qr-fallback { color: var(--ink-2); font-size: 14px; }
.qr-cap { margin: 12px 0 0; font-size: 14px; font-weight: 600; color: var(--ink); }

/* ---------- FAQ ---------- */
.faq__list { display: grid; gap: 12px; max-width: 760px; margin: 0 auto; }
.faq__item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 4px 20px; }
.faq__item summary { cursor: pointer; padding: 16px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after { content: "+"; color: var(--primary); font-size: 22px; font-weight: 700; transition: transform .2s ease; }
.faq__item[open] summary::after { content: "\2212"; }
.faq__item p { margin: 0 0 16px; color: var(--ink-2); font-size: 15px; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); padding: 24px 0; margin-top: 40px; }
.footer__inner { display: flex; justify-content: space-between; align-items: center; color: var(--ink-2); font-size: 14px; }
.footer__links a:hover { color: var(--primary); }

/* ---------- 滚动揭示 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ---------- 响应式 ---------- */
@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 40px; }
  .hero__lead { margin-left: auto; margin-right: auto; }
  .hero__actions { justify-content: center; }
  .hero__visual { order: -1; }
  .cta__inner { grid-template-columns: 1fr; text-align: center; padding: 36px 24px; }
  .cta__qr { margin-top: 8px; }
}
@media (max-width: 640px) {
  .features__grid { grid-template-columns: 1fr; }
  .trust { grid-template-columns: 1fr; }
  .trust__item { padding: 6px 0; border-bottom: 1px solid var(--line); }
  .trust__item:last-child { border-bottom: none; }
  .step { flex-direction: row; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
}