:root{
  --paper:#f7f2e9;
  --paper-2:#efe6d6;
  --white:#fffdf8;
  --ink:#2b2621;
  --ink-soft:#5f564a;
  --ink-mute:#8b8073;
  --accent:#b0522b;
  --accent-2:#8a6a3f;
  --line:#e2d7c4;
  --line-strong:#cfc0a6;
  --shadow:0 18px 40px -24px rgba(60,40,20,.35);
  --radius:16px;
  --serif:"Noto Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --sans:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* ---------- Nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px clamp(20px,5vw,64px);
  background:rgba(247,242,233,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  background:var(--accent);color:#fff;
  display:grid;place-items:center;
  font-family:var(--serif);font-size:20px;font-weight:700;
  box-shadow:inset 0 -2px 0 rgba(0,0,0,.12);
}
.brand-name{font-family:var(--serif);font-weight:700;font-size:17px;letter-spacing:.4px}
.brand-name em{font-style:normal;font-family:var(--sans);font-weight:400;font-size:12px;color:var(--ink-mute);margin-left:8px;letter-spacing:1px}
.nav-links{display:flex;gap:clamp(14px,2.4vw,30px);font-size:14px;color:var(--ink-soft)}
.nav-links a{position:relative;transition:color .25s}
.nav-links a:hover{color:var(--accent)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--accent);transition:width .25s}
.nav-links a:hover::after{width:100%}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:clamp(70px,12vh,130px) clamp(20px,5vw,64px) clamp(60px,9vh,110px);
  overflow:hidden;
}
.hero-inner{position:relative;z-index:2;max-width:1080px;margin:0 auto}
.eyebrow{
  font-size:12px;letter-spacing:3px;text-transform:uppercase;
  color:var(--accent-2);font-weight:600;margin-bottom:14px;
}
.slogan{
  font-family:var(--serif);
  font-size:clamp(18px,2.4vw,26px);
  font-weight:700;
  color:var(--accent);
  letter-spacing:.5px;
  margin:0 0 24px;
}
.hero h1{
  font-family:var(--serif);
  font-size:clamp(38px,6.4vw,74px);
  line-height:1.18;
  font-weight:900;
  letter-spacing:-.5px;
  margin-bottom:26px;
}
.hero h1::after{
  content:"";display:block;width:88px;height:4px;margin-top:26px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  border-radius:4px;
}
.lede{
  font-size:clamp(15px,1.6vw,19px);
  color:var(--ink-soft);
  max-width:660px;
  margin-bottom:36px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:56px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 26px;border-radius:999px;
  font-size:14px;font-weight:600;letter-spacing:.4px;
  transition:transform .2s,box-shadow .2s,background .2s;
}
.btn-solid{background:var(--accent);color:#fff;box-shadow:0 12px 24px -12px rgba(176,82,43,.7)}
.btn-solid:hover{transform:translateY(-2px);box-shadow:0 18px 30px -14px rgba(176,82,43,.8)}
.btn-ghost{border:1px solid var(--line-strong);color:var(--ink-soft);background:var(--white)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.hero-stats{
  display:flex;gap:clamp(24px,5vw,64px);
  border-top:1px solid var(--line);padding-top:28px;max-width:640px;
}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats dt{font-family:var(--serif);font-size:clamp(28px,3.4vw,42px);font-weight:900;color:var(--accent);line-height:1}
.hero-stats dd{font-size:13px;color:var(--ink-mute);letter-spacing:1px;margin-top:8px}
.hero-glow{
  position:absolute;right:-12%;top:-18%;
  width:60vw;height:60vw;max-width:760px;max-height:760px;
  background:radial-gradient(circle at 40% 40%,rgba(176,82,43,.18),rgba(176,82,43,.05) 45%,transparent 70%);
  border-radius:50%;filter:blur(10px);z-index:1;
}

/* ---------- Sections ---------- */
.section{padding:clamp(64px,9vh,110px) clamp(20px,5vw,64px)}
.section-alt{background:var(--paper-2)}
.section-head{max-width:1080px;margin:0 auto 52px}
.section-head h2{
  font-family:var(--serif);
  font-size:clamp(26px,3.6vw,40px);
  font-weight:900;letter-spacing:-.3px;margin-bottom:16px;
}
.section-head .sub{color:var(--ink-soft);font-size:clamp(14px,1.4vw,16px);max-width:760px}

/* ---------- Zones ---------- */
.zone-grid{
  max-width:1080px;margin:0 auto;
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
.zone-card{
  position:relative;
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:34px 28px 30px;
  box-shadow:var(--shadow);
  transition:transform .25s,border-color .25s;
  overflow:hidden;
}
.zone-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--accent),var(--accent-2));
  opacity:.9;
}
.zone-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.zone-no{
  font-family:var(--serif);font-size:13px;font-weight:700;
  color:var(--accent);letter-spacing:2px;
}
.zone-card h3{font-family:var(--serif);font-size:22px;font-weight:800;margin:10px 0 4px}
.zone-tag{font-size:12px;letter-spacing:1.5px;color:var(--ink-mute);margin-bottom:16px}
.zone-card p:last-child{font-size:14.5px;color:var(--ink-soft)}

/* ---------- Anchors · 4 大类分组 ---------- */
.anchor-groups{
  max-width:1080px;margin:0 auto;
  display:grid;grid-template-columns:repeat(2,1fr);gap:20px;
}
.anchor-group{
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 26px 18px;
  box-shadow:var(--shadow);
}
.anchor-group h3{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  font-family:var(--serif);font-size:17px;font-weight:800;
  color:var(--accent);letter-spacing:.5px;
  padding-bottom:12px;margin-bottom:8px;border-bottom:1px solid var(--line);
}
.anchor-group h3 em{
  font-style:normal;font-family:var(--sans);font-weight:400;
  font-size:11.5px;color:var(--ink-mute);letter-spacing:1px;
}
.anchor-items{list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:2px 16px}
.anchor-items li{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px dashed var(--line)}
.anchor-items li:last-child,.anchor-items li:nth-last-child(2){border-bottom:none}
.anchor-items b{
  flex:0 0 26px;height:26px;border-radius:7px;
  display:grid;place-items:center;
  background:var(--paper-2);color:var(--accent);
  font-family:var(--serif);font-size:13px;font-weight:800;
}
.anchor-items span{
  display:flex;align-items:baseline;gap:6px;
  font-size:13.5px;color:var(--ink);line-height:1.35;
}
.anchor-items .a-name{font-style:normal}
.anchor-items .a-glyph{font-style:normal;font-size:11.5px;color:var(--ink-mute)}

/* ---------- 语言切换 ---------- */
.lang-switch{
  display:flex;align-items:center;gap:2px;
  border:1px solid var(--line-strong);border-radius:999px;
  padding:3px;background:var(--white);
}
.lang-switch button{
  appearance:none;-webkit-appearance:none;border:none;background:transparent;cursor:pointer;
  font-family:var(--sans);font-size:12px;letter-spacing:.5px;color:var(--ink-mute);
  padding:5px 12px;border-radius:999px;transition:background .2s,color .2s;
}
.lang-switch button:hover{color:var(--accent)}
.lang-switch button.active{background:var(--accent);color:#fff}

/* ---------- 英文排版适配 ---------- */
html[lang="en"] .hero h1{font-size:clamp(31px,4.6vw,58px);letter-spacing:-.8px}
html[lang="en"] .hero h1::after{margin-top:22px}
html[lang="en"] .anchor-items{grid-template-columns:1fr}
html[lang="en"] .anchor-items li:nth-last-child(2){border-bottom:1px dashed var(--line)}
html[lang="en"] .anchor-items li:last-child{border-bottom:none}
html[lang="en"] .anchor-items .a-glyph{display:none}
html[lang="en"] .hero-stats{max-width:none}
html[lang="en"] .zone-tag{letter-spacing:.2px}
html[lang="en"] .vi-title{flex-wrap:wrap;row-gap:4px}
html[lang="en"] .vi-title em{line-height:1.5}
html[lang="en"] .logo-card figcaption{letter-spacing:0}

/* ---------- 博文广智 · 规格卡 ---------- */
.spec-grid{
  max-width:1080px;margin:0 auto 52px;
  display:grid;grid-template-columns:repeat(2,1fr);gap:20px;
}
.spec-card{
  background:var(--white);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 28px;
  box-shadow:var(--shadow);
}
.spec-num{
  font-family:var(--serif);font-size:38px;font-weight:900;
  color:var(--accent);line-height:1;margin-bottom:6px;
}
.spec-card h3{font-family:var(--serif);font-size:17px;font-weight:800;margin-bottom:10px}
.spec-card p{font-size:14px;color:var(--ink-soft)}
.spec-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.spec-tags span{
  font-size:12px;letter-spacing:.4px;color:var(--accent);
  background:var(--paper);border:1px solid var(--line);
  border-radius:999px;padding:4px 11px;
}

/* ---------- VI ---------- */
.vi-group{max-width:1080px;margin:0 auto 46px}
.vi-group:last-child{margin-bottom:0}
.vi-title{
  display:flex;align-items:baseline;gap:12px;
  font-family:var(--serif);font-size:19px;font-weight:800;
  margin-bottom:18px;padding-bottom:10px;border-bottom:1px solid var(--line);
}
.vi-title em{font-style:normal;font-family:var(--sans);font-size:12px;color:var(--ink-mute);font-weight:400;letter-spacing:1px}
.logo-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:16px;
}
.logo-card{
  background:var(--paper);border:1px solid var(--line);border-radius:14px;
  padding:14px;display:flex;flex-direction:column;align-items:center;gap:10px;
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.logo-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.logo-card img{
  width:100%;height:112px;object-fit:contain;border-radius:8px;
}
.logo-card figcaption{font-size:13px;color:var(--ink-soft);letter-spacing:.5px}

/* ---------- Capabilities ---------- */
.cap-grid{
  max-width:1080px;margin:0 auto;
  display:grid;grid-template-columns:repeat(2,1fr);gap:20px;
}
.cap-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 28px;transition:transform .25s,border-color .25s;
}
.cap-card:hover{transform:translateY(-3px);border-color:var(--accent)}
.cap-card h3{
  font-family:var(--serif);font-size:19px;font-weight:800;margin-bottom:12px;
  display:flex;align-items:center;gap:10px;
}
.cap-card h3::before{
  content:"";width:8px;height:8px;border-radius:50%;
  background:var(--accent);flex:0 0 auto;
}
.cap-card p{font-size:14.5px;color:var(--ink-soft)}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--line);padding:40px clamp(20px,5vw,64px)}
.footer-inner{max-width:1080px;margin:0 auto;display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:12px}
.footer-brand{font-family:var(--serif);font-size:17px;font-weight:800}
.footer-brand span{font-family:var(--sans);font-size:13px;font-weight:400;color:var(--ink-mute)}
.footer-meta{font-size:12.5px;color:var(--ink-mute);letter-spacing:1px}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .zone-grid{grid-template-columns:1fr}
  .cap-grid{grid-template-columns:1fr}
  .anchor-groups{grid-template-columns:1fr}
  .spec-grid{grid-template-columns:1fr}
  .nav-links{display:none}
}
@media(max-width:520px){
  .hero-stats{gap:18px 22px;flex-wrap:wrap}
  .logo-grid{grid-template-columns:repeat(2,1fr)}
  .anchor-items{grid-template-columns:1fr}
  .anchor-items li:last-child{border-bottom:none}
  .anchor-items li:nth-last-child(2){border-bottom:1px dashed var(--line)}
}

/* ---------- 密枢码门禁 ---------- */
.gate-card{
  max-width:520px;margin:0 auto;background:var(--white);
  border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:28px 26px;text-align:center;
}
.gate-state{display:flex;flex-direction:column;align-items:center;gap:14px}
.gate-state[hidden]{display:none !important}
.gate-tip{font-size:16px;color:var(--ink-soft);margin:0}
.pin-row{display:flex;gap:10px;justify-content:center}
.pin-cell{
  width:46px;height:56px;text-align:center;font-size:26px;font-family:var(--serif);
  border:2px solid var(--line-strong);border-radius:12px;background:var(--paper);
  color:var(--ink);transition:border-color .15s,box-shadow .15s;
}
.pin-cell:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(176,82,43,.15)}
.pin-count{font-size:14px;color:var(--ink-mute);margin:0}
.pin-count b{color:var(--accent);font-family:var(--serif);font-size:18px}
.gate-err{color:#b3261e;font-size:14px;margin:0;min-height:18px}
.gate-ok{font-family:var(--serif);font-size:22px;color:var(--accent);margin:0}
.gate-demo{font-size:14px;color:var(--ink-mute);margin:0}
.gate-reset{margin:6px 0 0}
.linklike{background:none;border:none;color:var(--ink-mute);font-size:13px;cursor:pointer;text-decoration:underline}
.linklike:hover{color:var(--accent)}
@media(max-width:520px){ .pin-cell{width:40px;height:50px;font-size:22px} .pin-row{gap:7px} }