:root {
  --ink: #171a35;
  --ink-soft: #2b304f;
  --paper: #f6f2eb;
  --white: #ffffff;
  --gold: #f5c76a;
  --coral: #ef8f70;
  --blue: #6f83b8;
  --muted: #6d7185;
  --line: #ddd7cd;
  --shadow: 0 18px 45px rgba(23, 26, 53, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
.container { width: min(1140px, calc(100% - 40px)); margin: 0 auto; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(246, 242, 235, 0.96); border-bottom: 1px solid var(--line); }
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; font-size: 21px; font-weight: 800; }
.brand img { width: 48px; height: 48px; object-fit: cover; border-radius: 10px; }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: 15px; font-weight: 700; }
.nav-links a:not(.btn):hover, .nav-links a.active { color: #9a5b44; }
.menu-toggle { display: none; border: 0; background: transparent; color: var(--ink); font-size: 26px; cursor: pointer; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 24px; border-radius: 6px; background: var(--coral); color: #1c2039; font-weight: 800; box-shadow: 0 8px 0 #c7684d; transition: transform .2s, box-shadow .2s; }
.btn:hover { transform: translateY(2px); box-shadow: 0 5px 0 #c7684d; }
.btn.gold { background: var(--gold); box-shadow: 0 8px 0 #c49a43; }
.btn.small { min-height: 42px; padding: 0 18px; }
.hero { overflow: hidden; background: var(--ink); color: var(--white); }
.hero-grid { min-height: 670px; display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 60px; padding: 70px 0; }
.eyebrow { color: var(--gold); font-size: 14px; font-weight: 800; letter-spacing: 2px; }
h1, h2, h3 { margin-top: 0; line-height: 1.25; letter-spacing: 0; }
h1 { margin-bottom: 22px; font-size: clamp(42px, 6vw, 72px); }
h2 { margin-bottom: 30px; font-size: clamp(30px, 4vw, 46px); }
h3 { margin-bottom: 12px; font-size: 22px; }
.hero p { max-width: 650px; margin: 0 0 30px; color: #d2d6e8; font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; }
.version { color: #aeb5cf; font-size: 14px; }
.hero-update { margin-top: 16px; color: #d2d6e8; font-size: 14px; }
.phone-stage { position: relative; min-height: 520px; display: grid; place-items: center; }
.phone-stage::before { content: ""; position: absolute; width: 360px; height: 360px; border: 1px solid rgba(245,199,106,.45); transform: rotate(10deg); }
.phone-stage img { position: relative; width: min(310px, 80vw); max-width: 400px; border-radius: 28px; box-shadow: 24px 28px 0 var(--gold); }
.stat-strip { margin-top: -36px; position: relative; z-index: 2; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); background: var(--white); box-shadow: var(--shadow); }
.stat { padding: 25px; text-align: center; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; font-size: 26px; }
.stat span { color: var(--muted); font-size: 14px; }
.section { padding: 100px 0; }
.section.dark { background: var(--ink); color: var(--white); }
.section.white { background: var(--white); }
.kicker { display: block; margin-bottom: 12px; color: #a25f47; font-weight: 800; font-size: 14px; letter-spacing: 1px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.feature { min-height: 230px; padding: 34px; background: var(--paper); }
.feature .num { display: block; margin-bottom: 35px; color: #a25f47; font: 800 15px Arial; }
.feature p { margin: 0; color: var(--muted); }
.screens { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; align-items: end; }
.screen { margin: 0; }
.screen img { width: 100%; max-width: 360px; margin: 0 auto; border-radius: 22px; box-shadow: var(--shadow); }
.screen figcaption { margin-top: 20px; text-align: center; color: var(--muted); font-size: 14px; }
.deep-links { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; }
.deep-link { display: block; min-height: 280px; padding: 36px; background: var(--ink-soft); border-top: 5px solid var(--gold); }
.deep-link.alt { border-color: var(--coral); }
.deep-link p { color: #c7cbdd; }
.deep-link .arrow { font-size: 32px; color: var(--gold); }
.reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review { margin: 0; padding: 28px; background: var(--white); border-left: 5px solid var(--coral); }
.review cite { color: var(--muted); font-style: normal; font-size: 14px; }
.review-note { margin: -14px 0 24px; color: var(--muted); font-size: 13px; }
.review-stars { margin-bottom: 14px; color: var(--coral); letter-spacing: 0; }
.review time { display: block; margin-top: 12px; color: var(--muted); font-size: 13px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-question { width: 100%; padding: 22px 0; display: flex; justify-content: space-between; gap: 20px; border: 0; background: transparent; color: var(--ink); text-align: left; font: 700 18px inherit; cursor: pointer; }
.faq-answer { display: none; padding: 0 0 24px; color: var(--muted); }
.faq-item.open .faq-answer { display: block; }
.download-band { padding: 60px 0; background: var(--gold); }
.download-inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.download-inner h2 { margin: 0; font-size: clamp(28px, 4vw, 42px); }
.site-footer { padding: 54px 0 26px; background: #101225; color: #b7bdd4; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 50px; align-items: start; }
.footer-brand { color: var(--white); }
.footer-links { display: flex; gap: 24px; }
.disclaimer { margin-top: 34px; padding-top: 22px; border-top: 1px solid #303550; font-size: 13px; }
.copyright { font-size: 13px; }
.page-hero { padding: 86px 0 76px; background: var(--ink); color: var(--white); }
.page-hero h1 { max-width: 880px; font-size: clamp(38px, 6vw, 64px); }
.page-hero p { max-width: 780px; color: #cbd0e3; font-size: 18px; }
.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 70px; }
.article h2 { margin-top: 62px; margin-bottom: 22px; font-size: 32px; }
.article h3 { margin-top: 30px; }
.article p { color: #4f5366; }
.article a { color: #9a523c; text-decoration: underline; text-underline-offset: 4px; }
.steps { counter-reset: step; display: grid; gap: 18px; }
.step { position: relative; padding: 28px 28px 28px 92px; background: var(--white); border: 1px solid var(--line); }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 26px; top: 28px; width: 42px; height: 42px; display: grid; place-items: center; background: var(--ink); color: var(--gold); font-weight: 800; }
.step h3 { margin: 0 0 8px; }
.step p { margin: 0; }
.side-nav { position: sticky; top: 108px; padding: 24px; background: var(--white); border-top: 5px solid var(--coral); }
.side-nav strong { display: block; margin-bottom: 14px; }
.side-nav a { display: block; padding: 9px 0; color: var(--muted); border-bottom: 1px solid var(--line); }
.check-list { padding: 0; list-style: none; }
.check-list li { padding: 12px 0 12px 34px; position: relative; border-bottom: 1px solid var(--line); }
.check-list li::before { content: "✓"; position: absolute; left: 4px; color: #a25f47; font-weight: 900; }
.feature-detail { margin-bottom: 28px; padding: 28px; background: var(--white); border-left: 5px solid var(--blue); }

@media (max-width: 820px) {
  .menu-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 20px; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; }
  .nav-links.open { display: flex; }
  .hero-grid { grid-template-columns: 1fr; min-height: 0; }
  .hero-copy { padding-top: 10px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .feature-grid, .deep-links, .content-layout { grid-template-columns: 1fr; }
  .screens { grid-template-columns: 1fr; }
  .screen img { max-width: 320px; }
  .reviews { grid-template-columns: 1fr; }
  .side-nav { position: static; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 540px) {
  .container { width: calc(100% - 28px); max-width: 1140px; }
  .hero-grid { padding: 48px 0 70px; gap: 20px; }
  h1 { font-size: 42px; }
  .phone-stage { min-height: 450px; }
  .phone-stage img { width: 240px; }
  .section { padding: 70px 0; }
  .feature-grid, .stats { grid-template-columns: 1fr; }
  .stat { border-right: 0; border-bottom: 1px solid var(--line); }
  .download-inner { align-items: flex-start; flex-direction: column; }
  .footer-links { flex-direction: column; gap: 10px; }
  .step { padding-left: 76px; }
}