:root{
  --teal:#0C8A7B;
  --teal-d:#08685C;
  --teal-l:#E7F4F1;
  --ink:#12312D;
  --paper:#F6FAF9;
  --line:#D5E5E1;
  --muted:#5E7B75;
  --rail:228px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:#fff;line-height:1.75;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.3;font-weight:700}
.wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 26px}

/* ---------- 左侧竖轨 ---------- */
.rail{
  position:fixed;left:0;top:0;bottom:0;width:var(--rail);
  background:linear-gradient(180deg,#0E3A34 0%,#0A2A26 100%);
  color:#fff;z-index:70;display:flex;flex-direction:column;
  padding:30px 26px 24px;
}
.rail-brand{display:flex;align-items:center;gap:12px;margin-bottom:38px}
.rail-brand img{width:44px;height:44px;border-radius:11px}
.rail-brand b{font-size:19px;letter-spacing:.5px;display:block}
.rail-brand small{display:block;font-size:10px;letter-spacing:2.2px;color:#7FC9BC}
.rail-nav{display:flex;flex-direction:column;gap:2px;flex:1}
.rail-nav a{
  display:flex;align-items:baseline;gap:10px;
  padding:9px 10px;border-radius:7px;font-size:14px;color:#B9DCD5;
  transition:background .18s ease,color .18s ease;
}
.rail-nav a i{font-style:normal;font-size:10px;letter-spacing:1px;color:#4E9086}
.rail-nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.rail-foot{border-top:1px solid rgba(255,255,255,.14);padding-top:16px;font-size:11px;color:#7FB8AE;line-height:1.9}
.rail-dl{
  display:block;text-align:center;background:var(--teal);color:#fff;
  border-radius:8px;padding:11px 0;font-size:14px;font-weight:600;margin-top:14px;
  transition:background .18s ease;
}
.rail-dl:hover{background:#12A090}

.shell{margin-left:var(--rail)}

/* ---------- 头部（移动端） ---------- */
.hd{display:none}

/* ---------- hero ---------- */
.hero{padding:64px 0 46px;background:linear-gradient(160deg,#F2FAF8 0%,#fff 62%)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:11px;letter-spacing:2.4px;color:var(--teal-d);
  background:var(--teal-l);border-radius:999px;padding:5px 13px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal)}
.hero h1{font-size:52px;letter-spacing:1px;margin-bottom:14px}
.hero h1 span{color:var(--teal)}
.hero .lead{font-size:19px;color:var(--teal-d);font-weight:600;margin-bottom:16px}
.hero .desc{font-size:15px;color:#44605A;max-width:640px;margin-bottom:26px}
.hero-acts{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
.btn{
  display:inline-flex;align-items:center;gap:9px;background:var(--teal);color:#fff;
  padding:13px 26px;border-radius:9px;font-weight:600;font-size:15px;
  box-shadow:0 8px 20px rgba(12,138,123,.24);transition:transform .18s ease,background .18s ease;
}
.btn svg{width:17px;height:17px}
.btn:hover{background:var(--teal-d);transform:translateY(-1px)}
.ghost{
  display:inline-flex;align-items:center;padding:12px 22px;border-radius:9px;
  border:1px solid var(--line);color:var(--teal-d);font-size:14px;font-weight:600;
}
.ghost:hover{border-color:var(--teal);background:var(--teal-l)}
.hero-meta{font-size:12px;color:var(--muted)}
.hero-meta time{font-family:"SFMono-Regular",Consolas,monospace}

/* 检索面板 */
.panel{
  background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:0 18px 44px rgba(12,60,54,.10);overflow:hidden;
}
.panel-h{
  display:flex;align-items:center;gap:9px;padding:14px 18px;
  background:var(--ink);color:#fff;font-size:13px;
}
.panel-h span{margin-left:auto;font-size:11px;color:#83BBB0;letter-spacing:1px}
.panel-h::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--teal)}
.panel-body{padding:16px 18px 18px}
.field{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:13px}
.field:last-of-type{border-bottom:0}
.field b{width:56px;color:var(--muted);font-weight:500;flex:none}
.field em{
  font-style:normal;background:var(--teal-l);color:var(--teal-d);
  border-radius:5px;padding:3px 9px;font-size:12px;
}
.panel-img{margin-top:14px;border-radius:9px;overflow:hidden;border:1px solid var(--line)}
.panel-img img{width:100%}

/* ---------- 数据条 ---------- */
.ticker{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--paper)}
.ticker-in{display:grid;grid-template-columns:repeat(4,1fr)}
.ticker div{padding:20px 18px;border-right:1px solid var(--line)}
.ticker div:last-child{border-right:0}
.ticker b{display:block;font-size:24px;color:var(--teal-d);font-family:"SFMono-Regular",Consolas,monospace}
.ticker span{font-size:12px;color:var(--muted)}

/* ---------- 通用区块 ---------- */
.sec{padding:66px 0}
.sec-alt{background:var(--paper)}
.sec-h{margin-bottom:34px}
.sec-h .tag{
  display:inline-block;font-size:10px;letter-spacing:2.6px;
  color:var(--teal);border-left:2px solid var(--teal);padding-left:8px;margin-bottom:10px;
}
.sec-h h2{font-size:31px;margin-bottom:10px}
.sec-h p{font-size:15px;color:#44605A;max-width:820px}

/* ---------- 使用指南 ---------- */
.gwrap{display:grid;grid-template-columns:1fr 300px;gap:22px;align-items:start}
.glist{list-style:none;counter-reset:g;display:grid;gap:12px}
.glist li{
  counter-increment:g;position:relative;background:#fff;border:1px solid var(--line);
  border-radius:10px;padding:16px 20px 16px 58px;font-size:14px;color:#44605A;
}
.glist li::before{
  content:counter(g,decimal-leading-zero);position:absolute;left:18px;top:15px;
  font-family:"SFMono-Regular",Consolas,monospace;font-size:12px;
  color:var(--teal-d);background:var(--teal-l);border-radius:5px;padding:1px 7px;
}
.gnote{
  background:var(--teal-l);border-radius:10px;padding:20px 22px;
  border-left:3px solid var(--teal);
}
.gnote b{display:block;font-size:15px;color:var(--teal-d);margin-bottom:8px}
.gnote p{font-size:13px;color:#3B5751}

/* ---------- 特色规格 ---------- */
.specs{display:grid;grid-template-columns:repeat(2,1fr);gap:0 46px}
.spec{border-top:1px solid var(--line);padding:22px 0 24px}
.spec-k{
  display:block;font-family:"SFMono-Regular",Consolas,monospace;
  font-size:10px;letter-spacing:1.8px;color:var(--teal);margin-bottom:8px;
}
.spec h4{font-size:17px;margin-bottom:7px;display:flex;align-items:center;gap:9px}
.spec h4 i{
  width:26px;height:26px;border-radius:7px;background:var(--teal-l);
  display:grid;place-items:center;flex:none;
}
.spec h4 i svg{width:15px;height:15px;stroke:var(--teal);fill:none;stroke-width:2}
.spec p{font-size:14px;color:#44605A}

/* ---------- 界面展示 ---------- */
.gallery{display:grid;grid-template-columns:repeat(12,1fr);gap:18px}
.gmain{grid-column:span 7;grid-row:span 2;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#fff}
.gmain img{width:100%;height:100%;object-fit:cover}
.gside{
  grid-column:span 5;border-radius:12px;overflow:hidden;border:1px solid var(--line);
  background:#fff;display:grid;grid-template-columns:1fr 104px;
}
.gside img{width:100%;height:100%;object-fit:cover}
.gside .gtxt{padding:16px 18px;display:flex;flex-direction:column;justify-content:center}
.gside b{font-size:15px;display:block;margin-bottom:5px}
.gside p{font-size:13px;color:#44605A}
.gside .gn{
  font-family:"SFMono-Regular",Consolas,monospace;font-size:10px;
  color:var(--teal);letter-spacing:1.5px;margin-bottom:6px;display:block;
}
.strip3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}
.strip3 figure{border:1px solid var(--line);border-radius:9px;overflow:hidden;background:#fff}
.strip3 img{width:100%}
.strip3 figcaption{font-size:12px;color:var(--muted);padding:9px 12px;border-top:1px solid var(--line)}

/* ---------- FAQ ---------- */
.qband{display:grid;gap:0;border-top:1px solid var(--line)}
.qa{
  position:relative;padding:24px 24px 24px 86px;
  border-bottom:1px solid var(--line);background:#fff;
}
.qa::before{
  content:"Q";position:absolute;left:24px;top:20px;
  font-size:44px;font-weight:800;color:var(--teal-l);line-height:1;
}
.qa h3{font-size:17px;margin-bottom:7px;color:var(--ink)}
.qa p{font-size:14px;color:#44605A;max-width:880px}

/* ---------- 评价 ---------- */
.voices{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.vc{
  background:#fff;border:1px solid var(--line);border-radius:10px;
  padding:20px 20px 18px;border-left:3px solid var(--teal);
}
.vc blockquote{font-size:14px;color:#3B5751;margin-bottom:16px}
.vc .vw{display:flex;align-items:center;gap:9px;font-size:12px;color:var(--muted)}
.vc .vw i{
  width:28px;height:28px;border-radius:50%;background:var(--teal-l);
  color:var(--teal-d);display:grid;place-items:center;font-style:normal;font-size:12px;font-weight:700;
}
.vc .vw time{margin-left:auto;font-family:"SFMono-Regular",Consolas,monospace;font-size:11px}

/* ---------- 下载条 ---------- */
.dlband{
  background:linear-gradient(120deg,#0C3B35 0%,#0B5B51 100%);
  color:#fff;padding:52px 0;position:relative;overflow:hidden;
}
.dlband::after{
  content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;
  border-radius:50%;border:36px solid rgba(255,255,255,.05);
}
.dlb-in{display:flex;align-items:center;gap:38px;flex-wrap:wrap;position:relative;z-index:1}
.dlb-in img{width:62px;height:62px;border-radius:14px}
.dlb-txt{flex:1;min-width:280px}
.dlb-txt h2{font-size:29px;margin-bottom:8px}
.dlb-txt h2 em{font-style:normal;color:#6FD5C3}
.dlb-txt p{font-size:14px;color:#BEE0D9;max-width:720px}
.dlb-meta{display:flex;gap:9px;flex-wrap:wrap;margin-top:14px}
.dlb-meta span{
  font-size:11px;border:1px solid rgba(255,255,255,.28);
  border-radius:999px;padding:4px 12px;color:#D5EEE9;
}
.btn-w{
  display:inline-flex;align-items:center;gap:9px;background:#fff;color:var(--teal-d);
  padding:14px 30px;border-radius:9px;font-weight:700;font-size:15px;flex:none;
}
.btn-w svg{width:17px;height:17px;stroke:var(--teal-d);fill:none;stroke-width:2}
.btn-w:hover{background:#E9FBF7}

/* ---------- footer ---------- */
.ft{background:#0B2622;color:#9CC6BE;padding:40px 0 30px;font-size:13px}
.ft-top{display:flex;align-items:center;gap:11px;margin-bottom:12px;color:#fff}
.ft-top img{width:30px;height:30px;border-radius:8px}
.ft-top strong{font-size:15px}
.ft p{max-width:760px;line-height:1.9}
.ft-links{display:flex;gap:20px;flex-wrap:wrap;margin:16px 0;font-size:12px}
.ft-links a:hover{color:#fff}
.ft-copy{border-top:1px solid rgba(255,255,255,.1);padding-top:16px;font-size:11px;color:#6E9A92;line-height:1.9}

/* ---------- 返回顶部 ---------- */
.backtop{
  position:fixed;right:24px;bottom:88px;z-index:60;width:44px;height:44px;
  border-radius:50%;border:0;background:var(--ink);color:#fff;cursor:pointer;
  display:grid;place-items:center;opacity:0;pointer-events:none;
  transition:opacity .2s ease,transform .2s ease;transform:translateY(10px);
}
.backtop.on{opacity:1;pointer-events:auto;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .rail{
    position:sticky;top:0;width:auto;height:58px;flex-direction:row;align-items:center;
    padding:0 18px;gap:16px;
  }
  .rail-brand{margin-bottom:0}
  .rail-brand img{width:32px;height:32px;border-radius:8px}
  .rail-brand b{font-size:15px}
  .rail-brand small{display:none}
  .rail-nav{flex-direction:row;flex:1;justify-content:flex-end;gap:4px;overflow:auto}
  .rail-nav a{padding:5px 9px;font-size:13px;white-space:nowrap}
  .rail-nav a i{display:none}
  .rail-foot,.rail-dl{display:none}
  .shell{margin-left:0}
  .hd{display:block}
  .hero{padding:44px 0 34px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero h1{font-size:40px}
  .specs{grid-template-columns:1fr;gap:0}
  .gallery{grid-template-columns:1fr}
  .gmain,.gside{grid-column:span 1;grid-row:auto}
  .gwrap{grid-template-columns:1fr}
  .voices{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  .wrap{padding:0 18px}
  .hero h1{font-size:33px}
  .hero .lead{font-size:17px}
  .sec{padding:46px 0}
  .sec-h h2{font-size:25px}
  .ticker-in{grid-template-columns:repeat(2,1fr)}
  .ticker div:nth-child(2){border-right:0}
  .ticker div:nth-child(1),.ticker div:nth-child(2){border-bottom:1px solid var(--line)}
  .voices{grid-template-columns:1fr}
  .strip3{
    display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;padding-bottom:6px;
  }
  .strip3 figure{flex:0 0 74%;scroll-snap-align:start}
  .qa{padding:20px 18px 20px 64px}
  .qa::before{left:16px;font-size:36px}
  .dlb-in{gap:18px}
  .dlb-txt h2{font-size:24px}
  .btn-w{width:100%;justify-content:center}
  .backtop{right:16px;bottom:76px;width:40px;height:40px}
}