:root {
  --ink: #241d18;
  --muted: #75695d;
  --cream: #fffaf2;
  --paper: #f6efe5;
  --chestnut: #8d4c2e;
  --orange: #e6a23c;
  --peach: #f2c8a5;
  --teal: #296d6a;
  --line: #e6d9c9;
  --shadow: 0 18px 50px rgba(72, 43, 25, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  border-bottom: 1px solid rgba(230, 217, 201, .8);
  background: rgba(255, 250, 242, .94);
  backdrop-filter: blur(14px);
}
.nav { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: .05em; }
.brand img { width: 42px; height: 42px; object-fit: cover; border-radius: 12px; }
.brand span { font-size: 20px; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a { padding: 8px 14px; color: var(--muted); font-size: 14px; border-radius: 8px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); background: #f2e6d7; }
.nav-toggle { display: none; border: 0; background: transparent; font-size: 24px; color: var(--ink); cursor: pointer; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  min-height: 46px; padding: 0 20px; border-radius: 10px; border: 1px solid transparent;
  font-weight: 700; font-size: 14px; cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 9px 22px rgba(72,43,25,.16); }
.btn-primary { background: var(--chestnut); color: #fffaf4; }
.btn-accent { background: var(--orange); color: var(--ink); }
.btn-ghost { border-color: #d4c3b0; color: var(--ink); background: transparent; }
.eyebrow { color: var(--teal); font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; line-height: 1.25; letter-spacing: -.02em; }
h1 { font-size: clamp(38px, 6vw, 70px); }
h2 { font-size: clamp(28px, 4vw, 44px); }
h3 { font-size: 20px; }
.lead { max-width: 640px; color: var(--muted); font-size: 17px; }
.hero { position: relative; overflow: hidden; padding: 94px 0 90px; background: var(--paper); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(360px, .96fr); gap: 72px; align-items: center; }
.hero-copy > * { margin-bottom: 24px; }
.hero-copy h1 { max-width: 540px; }
.hero-copy .lead { margin-bottom: 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-note { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 13px; }
.hero-note i { width: 7px; height: 7px; display: inline-block; border-radius: 50%; background: var(--teal); }
.hero-visual { position: relative; min-height: 470px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; width: 370px; height: 370px; border-radius: 50%; background: #efd2a4; opacity: .65; }
.hero-device { position: relative; width: min(268px, 65%); padding: 10px; border-radius: 30px; background: #171310; box-shadow: 0 32px 60px rgba(36,29,24,.28); transform: rotate(5deg); }
.hero-device img { width: 100%; border-radius: 22px; }
.hero-tag { position: absolute; right: -24px; top: 70px; padding: 10px 14px; border-radius: 10px; background: var(--cream); color: var(--chestnut); box-shadow: var(--shadow); font-size: 13px; font-weight: 800; }
.hero-tag.bottom { right: auto; left: -28px; top: auto; bottom: 64px; color: var(--teal); }
.stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--cream); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 26px 22px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; font-size: 26px; color: var(--chestnut); }
.stat span { color: var(--muted); font-size: 13px; }
.section { padding: 100px 0; }
.section-tint { background: #f6efe5; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 42px; }
.section-head p { max-width: 440px; margin: 0; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { padding: 26px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,250,242,.72); }
.feature-icon { display: grid; place-items: center; width: 42px; height: 42px; margin-bottom: 22px; border-radius: 12px; background: #eed7bb; color: var(--chestnut); font-weight: 800; }
.feature p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.gallery { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; align-items: end; }
.shot { padding: 8px; border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: 0 12px 24px rgba(72,43,25,.08); }
.shot:nth-child(2), .shot:nth-child(4) { transform: translateY(28px); }
.shot img { width: 100%; max-width: 400px; margin: 0 auto; border-radius: 10px; }
.shot figcaption { padding: 12px 6px 4px; color: var(--muted); font-size: 13px; }
.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 72px; align-items: center; }
.list { display: grid; gap: 18px; margin: 28px 0 0; padding: 0; list-style: none; }
.list li { display: grid; grid-template-columns: 36px 1fr; gap: 14px; align-items: start; }
.list b { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--orange); color: var(--ink); font-size: 13px; }
.list strong { display: block; margin-bottom: 2px; }
.list span { color: var(--muted); font-size: 14px; }
.mini-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.mini-link { display: flex; flex-direction: column; min-height: 160px; justify-content: space-between; padding: 22px; border-radius: 14px; background: var(--ink); color: #fff9ef; }
.mini-link:nth-child(2) { background: var(--teal); }
.mini-link small { color: rgba(255,255,255,.7); }
.mini-link span { font-size: 18px; font-weight: 700; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quote { padding: 24px; border-top: 3px solid var(--orange); background: #fff; }
.quote p { margin: 0 0 18px; font-size: 15px; }
.quote cite { color: var(--muted); font-size: 13px; font-style: normal; }
.download-band { padding: 68px 0; background: var(--chestnut); color: #fff8ef; }
.download-band .band-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.download-band p { margin: 12px 0 0; color: rgba(255,248,239,.72); }
.footer { padding: 48px 0 30px; background: #241d18; color: #fff8ef; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 35px; }
.footer .brand span { color: #fff8ef; }
.footer p, .footer a { color: rgba(255,248,239,.66); font-size: 13px; }
.footer h3 { font-size: 15px; margin-bottom: 14px; color: #fff8ef; }
.footer-links { display: grid; gap: 8px; }
.copyright { display: flex; justify-content: space-between; gap: 20px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.14); color: rgba(255,248,239,.5); font-size: 12px; }
.page-hero { padding: 78px 0 70px; background: var(--paper); }
.page-hero .lead { margin: 20px 0 0; }
.article { max-width: 860px; margin: 0 auto; }
.article h2 { margin: 55px 0 18px; font-size: 30px; }
.article h3 { margin: 30px 0 8px; }
.article p { margin: 0 0 16px; color: #574a3e; }
.article-intro { font-size: 18px; color: var(--ink) !important; }
.step-list { display: grid; gap: 18px; margin: 30px 0; }
.step { display: grid; grid-template-columns: 70px 1fr; gap: 20px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.step-num { color: var(--chestnut); font-size: 30px; font-weight: 800; }
.callout { margin: 32px 0; padding: 24px; border-left: 4px solid var(--teal); background: #edf5f2; color: #275653; }
.faq-list { display: grid; gap: 10px; margin-top: 28px; }
details { border: 1px solid var(--line); border-radius: 10px; background: #fff; }
summary { padding: 18px 20px; cursor: pointer; font-weight: 700; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--chestnut); font-size: 20px; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { margin: 0; padding: 0 20px 18px; color: var(--muted); font-size: 14px; }
.table-wrap { overflow-x: auto; margin: 24px 0; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: 14px 16px; border: 1px solid var(--line); text-align: left; font-size: 14px; }
th { background: #f3e8da; }
@media (max-width: 900px) {
  .hero-grid, .split { grid-template-columns: 1fr; gap: 42px; }
  .hero { padding-top: 68px; }
  .hero-visual { min-height: 420px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(3, 1fr); }
  .gallery .shot:nth-child(4), .gallery .shot:nth-child(5) { display: none; }
  .quote-grid { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .wrap { width: min(100% - 28px, 560px); }
  .nav { height: 66px; }
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; left: 14px; right: 14px; top: 70px; padding: 10px; flex-direction: column; align-items: stretch; background: var(--cream); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: 12px 14px; }
  .brand span { font-size: 18px; }
  .hero-grid { gap: 18px; }
  .hero-visual { min-height: 360px; }
  .hero-device { width: 230px; }
  .hero-tag { right: 0; }
  .hero-tag.bottom { left: 0; }
  h1 { font-size: 42px; }
  .section { padding: 70px 0; }
  .section-head { display: block; }
  .section-head p { margin-top: 16px; }
  .stats-grid { 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, .gallery, .mini-links { grid-template-columns: 1fr; }
  .gallery .shot { transform: none; }
  .gallery .shot:nth-child(4), .gallery .shot:nth-child(5) { display: block; }
  .download-band .band-inner { display: block; }
  .download-band .btn { margin-top: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .copyright { display: block; }
  .copyright span { display: block; margin-top: 8px; }
  .page-hero { padding: 58px 0 48px; }
  .step { grid-template-columns: 48px 1fr; gap: 12px; }
}