:root{
  --bg:#ffffff;
  --bg-soft:#f8fafc;
  --bg-panel:#f4f7f8;
  --bg-mint:#eef6f4;
  --ink:#111827;
  --ink-2:#1f2937;
  --ink-3:#374151;
  --muted:#6b7280;
  --brand:#0f766e;
  --brand-2:#14b8a6;
  --accent:#0ea5a4;
  --gold:#d4a72c;
  --line:rgba(15,23,42,0.08);
  --radius:18px;
  --shadow:0 18px 50px rgba(15,23,42,0.12);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.site-shell{width:min(1280px,92%);margin:0 auto}

#bg-points{position:fixed;inset:0;z-index:-2;pointer-events:none}

.nav-main{position:sticky;top:0;z-index:999;background:rgba(255,255,255,0.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:.2s}
.nav-main.scrolled{box-shadow:0 6px 20px rgba(15,23,42,0.12)}
.nav-main__row{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink-2)}
.brand img{height:28px}
.nav-main__links{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--ink-3)}
.nav-main__links a{padding:6px 10px;border-radius:999px;transition:.2s}
.nav-main__links a:hover{background:rgba(20,184,166,0.12)}
.nav-cta{background:linear-gradient(90deg,var(--brand),var(--brand-2));color:#fff}
.nav-main__toggle{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:transparent;position:relative}
.nav-main__toggle::before,.nav-main__toggle::after{content:"";position:absolute;left:9px;right:9px;height:2px;background:#111827}
.nav-main__toggle::before{top:13px}.nav-main__toggle::after{bottom:13px}
.nav-main__panel{display:none;flex-direction:column;gap:10px;padding:12px 0 18px}
.nav-main__panel a{padding:8px 10px;border-radius:10px;background:var(--bg-soft)}
.nav-main__panel.open{display:flex}

.hero-intent{padding:88px 0 100px;background:linear-gradient(160deg,#f8fafc 0%,#eef6f4 50%,#ffffff 100%);position:relative}
.hero-intent::before{content:"";position:absolute;inset:0;pointer-events:none;background:
  radial-gradient(500px 240px at 20% 10%,rgba(20,184,166,0.15),transparent 60%),
  radial-gradient(600px 300px at 80% 20%,rgba(14,165,164,0.12),transparent 60%);
  opacity:.9}
.hero-intent__grid{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;position:relative;align-items:center}
.hero-intent__copy{max-width:640px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(20,184,166,0.12);border:1px solid var(--line);font-size:12px;color:var(--ink-3)}
.hero-intent h1{font-size:40px;line-height:1.2;margin-top:14px}
.hero-intent p{color:var(--muted);margin-top:10px}
.hero-actions{display:flex;gap:12px;margin-top:18px;flex-wrap:wrap}
.btn{padding:12px 20px;border-radius:12px;font-weight:600;border:1px solid transparent;transition:.2s}
.btn-primary{background:linear-gradient(90deg,var(--brand),var(--brand-2));color:#fff;box-shadow:var(--shadow)}
.btn-outline{border-color:var(--line);background:#fff}
.btn:hover{transform:translateY(-2px)}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px;color:var(--muted)}
.hero-tags span{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);padding:6px 10px;border-radius:999px;font-size:12px;background:#fff}
.hero-tags img{width:16px;height:16px;object-fit:contain}
.hero-tags .dot::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:linear-gradient(90deg,var(--brand),var(--brand-2))}
.hero-intent__panel{display:grid;grid-template-columns:1fr 1.1fr;gap:16px;align-items:stretch;max-width:720px;margin-left:auto}
.intent-tiles{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-content:start}
.intent-tile{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 12px;display:grid;gap:6px;box-shadow:var(--shadow);transition:.2s;font-size:13px;min-height:56px;align-content:center}
.intent-tile:hover{transform:translateY(-6px);border-color:rgba(20,184,166,0.4)}
.intent-media{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow);min-height:300px}
.intent-media img{border-radius:14px;box-shadow:0 12px 30px rgba(15,23,42,0.12);width:100%;height:300px;object-fit:cover}
.intent-media__float{position:absolute;width:40%;right:12px;bottom:12px}

.section-head{margin-bottom:22px}
.section-head p{color:var(--muted)}

.download-center{padding:110px 0;background:var(--bg-soft)}
.download-center__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.download-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:grid;gap:10px;box-shadow:var(--shadow);transition:.2s}
.download-card:hover{transform:translateY(-6px);border-color:rgba(20,184,166,0.4)}
.download-card__top{display:flex;align-items:center;gap:8px}
.download-card__top img{width:38px;height:38px;object-fit:contain;background:var(--bg-panel);border-radius:12px;padding:6px}
.download-card__shot{width:100%;height:160px;object-fit:cover;border-radius:14px;border:1px solid var(--line)}
.download-card__meta{color:var(--muted);font-size:12px}

.brand-explain{padding:110px 0;background:var(--bg-mint)}
.brand-explain__grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:center}
.brand-explain__points{display:grid;gap:12px}
.point-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:var(--shadow)}
.brand-explain__media{margin-top:20px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.brand-explain__media img{height:220px;object-fit:cover;border-radius:16px;border:1px solid var(--line);box-shadow:var(--shadow)}

.install-ways{padding:110px 0;background:#ffffff}
.install-ways__grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}
.install-ways__steps ol{margin:14px 0 0 18px;color:var(--muted)}
.install-ways__cards{display:grid;gap:16px}
.install-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;display:grid;gap:8px;box-shadow:var(--shadow)}
.install-card__title{display:flex;align-items:center;gap:8px;font-weight:600}
.install-card__title img{width:20px;height:20px;object-fit:contain}

.asset-support{padding:110px 0;background:var(--bg-panel)}
.asset-support__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.asset-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;display:grid;gap:6px;box-shadow:var(--shadow)}
.asset-item img{width:44px;height:44px;object-fit:contain;background:var(--bg-panel);border-radius:12px;padding:6px}
.asset-support__net{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.asset-support__net span{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);padding:6px 10px;border-radius:999px;font-size:12px;color:var(--muted);background:#fff}
.asset-support__net img{width:16px;height:16px;object-fit:contain}
.asset-support__media{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.asset-support__media img{height:200px;object-fit:cover;border-radius:16px;border:1px solid var(--line);box-shadow:var(--shadow)}

.path-line{padding:110px 0;background:var(--bg-soft)}
.path-line__rail{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.path-node{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;display:grid;gap:6px;box-shadow:var(--shadow)}
.path-node span{color:var(--gold);font-weight:700}

.search-answers{padding:110px 0;background:#ffffff}
.search-answers__grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.answer-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:var(--shadow)}

.ui-gallery{padding:110px 0;background:var(--bg-mint)}
.ui-gallery__grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:start}
.ui-gallery__main{background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow)}
.ui-gallery__main img{width:100%;height:360px;object-fit:cover;border-radius:14px}
.ui-gallery__main span{display:block;margin-top:8px;color:var(--muted);font-size:12px}
.ui-gallery__side{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.ui-thumb{background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:var(--shadow);transition:.2s}
.ui-thumb img{width:100%;height:140px;object-fit:cover;border-radius:12px}
.ui-thumb:hover{transform:translateY(-4px)}
.ui-thumb span{display:block;margin-top:6px;color:var(--muted);font-size:12px}

.scene-panel{padding:110px 0;background:var(--bg-soft)}
.scene-panel__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.scene-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;display:grid;gap:6px;box-shadow:var(--shadow);transition:.2s}
.scene-box img{width:28px;height:28px;object-fit:contain}
.scene-box:hover{transform:translateY(-4px)}
.scene-box p{color:var(--muted);font-size:12px}

.security-note{padding:110px 0;background:#ffffff}
.security-note__grid{display:grid;grid-template-columns:1fr;gap:16px}
.security-note__tips{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.security-note__alert{background:rgba(212,167,44,0.12);border:1px solid rgba(212,167,44,0.4);border-radius:14px;padding:12px;color:#7a5e12}
.tip{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;box-shadow:var(--shadow)}

.faq-area{padding:110px 0;background:var(--bg-panel)}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.faq-q{width:100%;text-align:left;background:transparent;border:0;color:var(--ink);padding:16px 18px;font-size:16px;display:flex;justify-content:space-between;align-items:center}
.faq-q::after{content:"+";transition:.2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;padding:0 18px;color:var(--muted);transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:260px;padding-bottom:16px}

.download-dock{padding:110px 0;background:linear-gradient(120deg,#e6fbf7,#dff6f2,#f8fafc)}
.download-dock__grid{row-gap:26px;display:grid;grid-template-columns:1.1fr .6fr .7fr;gap:20px;align-items:start}
.download-dock__grid > div:first-child{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.download-dock__qr img{width:200px;height:200px;object-fit:cover;border-radius:16px;box-shadow:var(--shadow)}
.download-dock__meta{display:grid;gap:8px}
.meta-tag{border:1px solid var(--line);padding:6px 10px;border-radius:999px;font-size:12px;background:#fff}
.meta-note{color:var(--muted);font-size:12px}

.footer-main{padding:50px 0;background:#f8fafc;border-top:1px solid var(--line)}
.footer-main__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:20px;align-items:start}
.footer-main__brand img{height:28px;margin-bottom:10px}
.footer-main__brand p{color:var(--muted)}
.footer-main__nav h4,.footer-main__support h4,.footer-main__contact h4{font-size:14px;margin-bottom:10px;color:var(--ink)}
.footer-main__nav a{display:block;color:var(--muted);margin-bottom:6px}
.support-tags span{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 10px;font-size:12px;margin:4px 6px 0 0}
.footer-main__contact{color:var(--muted)}

.reveal{opacity:0;transform:translateY(18px);transition:.6s}
.reveal.in{opacity:1;transform:translateY(0)}

@media (max-width:980px){
  .nav-main__links{display:none}
  .nav-main__toggle{display:block}
  .nav-main__panel{display:none}
  .hero-intent__grid,.brand-explain__grid,.install-ways__grid,.ui-gallery__grid,.download-dock__grid{grid-template-columns:1fr;gap:20px;align-items:start}
  .hero-intent__panel{grid-template-columns:1fr;max-width:100%}
  .intent-tiles{grid-template-columns:1fr 1fr}
  .intent-media{min-height:260px}
  .download-center__grid,.asset-support__grid,.scene-panel__grid{grid-template-columns:1fr 1fr}
  .path-line__rail{grid-template-columns:1fr}
  .security-note__tips{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
  .footer-main__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .download-center__grid,.asset-support__grid,.scene-panel__grid{grid-template-columns:1fr}
  .search-answers__grid{grid-template-columns:1fr}
  .hero-intent{padding:72px 0 84px}
  .hero-intent__grid{grid-template-columns:1fr;gap:18px}
  .hero-intent__panel{grid-template-columns:1fr;gap:12px}
  .intent-media{order:1;min-height:260px;max-width:96%;margin:0 auto}
  .intent-media img{height:260px}
  .intent-media__float{width:48%}
  .intent-tiles{order:2;grid-template-columns:repeat(2,1fr);gap:12px;max-width:96%;margin:6px auto 0}
  .intent-tile{min-height:64px;padding:14px;font-size:14px;text-align:center}
}
@media (max-width:390px){
  .hero-intent h1{font-size:28px}
  .download-dock__qr img{width:170px;height:170px}
}

.download-dock .btn-primary{margin-top:10px}