:root{
  --ink:#111714;
  --paper:#f6f3ea;
  --muted:#68736e;
  --line:#d8d6ca;
  --panel:#fffdf7;
  --carbon:#101513;
  --gold:#d7ad45;
  --teal:#239b82;
  --blue:#246c9f;
  --shadow:0 24px 70px rgba(22,28,25,.15);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","Noto Sans SC",sans-serif;line-height:1.65}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:24px;padding:14px clamp(18px,4vw,56px);background:rgba(246,243,234,.9);border-bottom:1px solid rgba(17,23,20,.08);backdrop-filter:blur(14px);transition:box-shadow .2s ease}
.site-header.is-scrolled{box-shadow:0 8px 30px rgba(22,28,25,.08)}
.brand{display:flex;align-items:center;gap:10px;font-weight:900}
.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:8px;background:linear-gradient(135deg,var(--gold),#6fd1b5);color:#111714}
.nav{display:flex;gap:20px;margin-left:auto;color:#42504a;font-size:14px}
.nav a:hover{color:var(--teal)}
.nav-cta,.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 18px;border-radius:8px;font-weight:800}
.nav-cta,.primary-button{background:var(--ink);color:#fff}
.secondary-button{border:1px solid rgba(17,23,20,.22);color:var(--ink);background:rgba(255,255,255,.42)}
.hero{position:relative;min-height:88vh;display:grid;align-items:end;padding:110px clamp(20px,5vw,72px) 56px;overflow:hidden;background:#0b100e}
.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,12,10,.88),rgba(8,12,10,.5) 42%,rgba(8,12,10,.14)),linear-gradient(0deg,rgba(8,12,10,.88),transparent 45%)}
.hero-image{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:right center;opacity:.82}
.hero-copy{position:relative;z-index:2;max-width:760px;color:#fff}
.eyebrow{margin:0 0 10px;color:var(--gold);font-size:14px;font-weight:900;letter-spacing:.08em}
h1,h2,h3,p{letter-spacing:0}
h1{margin:0;font-size:clamp(38px,7vw,78px);line-height:1.04}
h2{margin:0;font-size:clamp(28px,4vw,48px);line-height:1.18}
h3{margin:0 0 8px;font-size:19px;line-height:1.35}
.hero-text{max-width:700px;margin:18px 0 0;color:#eef3ef;font-size:19px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.summary,.section,.cta-section{padding:72px clamp(20px,5vw,72px)}
.summary{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(360px,.75fr);gap:34px;align-items:center;background:var(--carbon);color:#f8f4e7}
.summary p{margin:0;font-size:22px;line-height:1.55}
.metric-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:0;padding:0;list-style:none}
.metric-list li,.feature-grid article,.scene-list article{padding:20px;border:1px solid var(--line);border-radius:8px;background:var(--panel)}
.metric-list li{border-color:rgba(255,255,255,.16);background:rgba(255,255,255,.06)}
.metric-list strong{display:block;font-size:24px;color:#fff}
.metric-list span{display:block;color:#cbd4cf;font-size:14px}
.section-heading{max-width:860px;margin-bottom:28px}
.section-heading p:not(.eyebrow){margin:12px 0 0;color:var(--muted);font-size:18px}
.feature-grid,.scene-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.feature-grid article{box-shadow:0 12px 36px rgba(22,28,25,.06)}
.feature-grid p,.scene-list p{margin:0;color:var(--muted)}
.flow{background:#ede8dc}
.flow-list{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:0;padding:0;counter-reset:flow}
.flow-list li{position:relative;min-height:170px;padding:54px 18px 18px;border-radius:8px;background:var(--panel);list-style:none;border:1px solid var(--line)}
.flow-list li:before{counter-increment:flow;content:counter(flow);position:absolute;top:16px;left:18px;display:grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--teal);color:#fff;font-weight:900}
.flow-list strong,.flow-list span{display:block}
.flow-list span{margin-top:8px;color:var(--muted)}
.gallery{background:#111714;color:#fff}
.gallery .section-heading p:not(.eyebrow){color:#c8d0cc}
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
figure{margin:0;border-radius:8px;overflow:hidden;background:#050806;border:1px solid rgba(255,255,255,.12);box-shadow:var(--shadow)}
figure.wide{grid-column:span 3}
figure img{width:100%;height:100%;max-height:620px;object-fit:contain;background:#050806}
figcaption{padding:12px 14px;color:#dbe3df;font-size:14px}
.scenes{background:#f8f6ef}
.comparison{background:#ede8dc}
.compare-table{display:grid;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--panel)}
.compare-table [role=row]{display:grid;grid-template-columns:1fr 1.2fr 1.4fr;border-bottom:1px solid var(--line)}
.compare-table [role=row]:last-child{border-bottom:0}
.compare-table span{padding:15px;border-right:1px solid var(--line)}
.compare-table span:last-child{border-right:0}
.compare-table [role=columnheader]{font-weight:900;background:#fff8df}
.faq-list{display:grid;gap:10px}
details{border:1px solid var(--line);border-radius:8px;background:var(--panel)}
summary{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 20px;cursor:pointer}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";font-weight:900;color:var(--teal)}
details[open] summary:after{content:"-"}
summary h3{margin:0}
details p{margin:0;padding:0 20px 20px;color:var(--muted)}
.cta-section{text-align:center;background:var(--carbon);color:#fff}
.cta-section p:not(.eyebrow){max-width:720px;margin:14px auto 24px;color:#d5ddd8}
.company-line{font-weight:800;color:#f8f4e7!important}
.cta-section .primary-button{background:linear-gradient(135deg,var(--gold),#62cdb0);color:#101513}
.modal-open{overflow:hidden}
.wechat-modal[hidden]{display:none}
.wechat-modal{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:22px}
.modal-backdrop{position:absolute;inset:0;background:rgba(5,8,6,.72);backdrop-filter:blur(8px)}
.modal-panel{position:relative;z-index:1;width:min(430px,100%);padding:26px;border-radius:8px;background:var(--panel);box-shadow:0 26px 90px rgba(0,0,0,.32);text-align:center}
.modal-panel h2{font-size:26px}
.modal-panel img{width:min(280px,82vw);margin:18px auto;border-radius:8px;border:1px solid var(--line);background:#fff}
.modal-note{margin:0;color:var(--muted)}
.modal-close{position:absolute;right:14px;top:14px;height:34px;padding:0 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);font-weight:800;cursor:pointer}
.modal-close:hover{border-color:var(--teal);color:var(--teal)}
.site-footer{display:flex;justify-content:space-between;gap:20px;padding:28px clamp(20px,5vw,72px);background:#080c0a;color:#c8d0cc}
.site-footer p{margin:0}
.site-footer a{color:#fff;text-decoration:underline}
@media (max-width:900px){
  .site-header{align-items:flex-start;flex-wrap:wrap}
  .nav{width:100%;margin-left:0;overflow-x:auto}
  .nav-cta{margin-left:auto}
  .summary{grid-template-columns:1fr}
  .metric-list,.feature-grid,.scene-list,.flow-list,.gallery-grid{grid-template-columns:1fr}
  figure.wide{grid-column:span 1}
  .compare-table [role=row]{grid-template-columns:1fr}
  .compare-table span{border-right:0;border-bottom:1px solid var(--line)}
  .compare-table span:last-child{border-bottom:0}
}
@media (max-width:560px){
  .hero{min-height:84vh;padding-top:96px}
  .hero-image{object-position:center 18%}
  .hero-text,.summary p{font-size:17px}
  .metric-list strong{font-size:20px}
  .site-footer{display:block}
  .site-footer a{display:inline-block;margin-top:12px}
}