/* ============================================================
   Zhixin Heng Electronics · PCB Solution Design
   深色工程风 — 深蓝阻焊板 + 沉金焊盘
   零依赖 · 零构建 · 中英共用同一份样式
   ============================================================ */

:root{
  --ink:#EDF1F6;
  --board:#FFFFFF;
  --panel:#FFFFFF;
  --panel-hi:#F4F7FB;
  --gold:#9C6E13;
  --gold-soft:#C79327;
  --copper:#A85C2C;
  --signal:#1B6CC0;
  --text:#16233A;
  --muted:#55657C;
  --dim:#5F6F86;
  --hair:rgba(14,27,46,.13);
  --hair-2:rgba(14,27,46,.22);
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,"Noto Sans SC",sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --maxw:1240px;
  --pad:clamp(20px,5vw,56px);
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  overflow-x:hidden;
  background-image:
    radial-gradient(1200px 700px at 78% -8%,rgba(27,108,192,.07),transparent 62%),
    radial-gradient(900px 600px at 8% 4%,rgba(184,135,31,.06),transparent 60%),
    linear-gradient(rgba(14,27,46,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(14,27,46,.05) 1px,transparent 1px);
  background-size:auto,auto,48px 48px,48px 48px;
  background-attachment:fixed;
}

img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,figure{margin:0}
ul{margin:0;padding:0;list-style:none}

::selection{background:rgba(156,110,19,.22);color:#0E1B2E}

:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:3px;
  border-radius:2px;
}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}

/* ---------- 通用零件 ---------- */

.mono{
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--dim);
}
.mono b{color:var(--gold);font-weight:600}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.24em;text-transform:uppercase;
  color:var(--gold);
  padding:6px 12px 6px 10px;
  border:1px solid rgba(156,110,19,.30);
  background:#FBF3E0;
}
.eyebrow::before{
  content:"";width:6px;height:6px;background:var(--gold);
  box-shadow:none;flex:none;
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 24px;
  font-size:.95rem;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;
  transition:transform .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease;
  cursor:pointer;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{
  background:linear-gradient(180deg,#DFAE49,#BC8A1D);
  color:#231906;
  box-shadow:0 8px 26px -12px rgba(156,110,19,.55);
}
.btn-primary:hover{box-shadow:0 14px 34px -12px rgba(156,110,19,.62)}
.btn-ghost{
  border-color:var(--hair-2);
  color:var(--text);
  background:transparent;
}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}

/* ---------- 顶栏 ---------- */

.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--hair);
  transition:background .25s ease,border-color .25s ease;
}
.site-header.scrolled{background:rgba(255,255,255,.96);border-bottom-color:var(--hair-2)}
.header-inner{
  display:flex;align-items:center;gap:16px;
  height:72px;
}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand-mark{width:34px;height:34px;flex:none}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-cn{font-size:1.02rem;font-weight:700;letter-spacing:.06em}
.brand-en{font-family:var(--mono);font-size:.56rem;letter-spacing:.2em;color:var(--dim);text-transform:uppercase}

.nav{margin-left:auto;display:flex;align-items:center;gap:2px;flex-wrap:nowrap;min-width:0}
.nav a{
  padding:9px 10px;font-size:.86rem;color:var(--muted);white-space:nowrap;
  position:relative;transition:color .18s ease;
}
.nav a::after{
  content:"";position:absolute;left:10px;right:10px;bottom:4px;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav a:hover{color:var(--text)}
.nav a:hover::after{transform:scaleX(1)}

.header-right{display:flex;align-items:center;gap:12px;flex:none;margin-left:auto}
.lang-switch{
  display:inline-flex;align-items:center;
  border:1px solid var(--hair-2);
  font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;
}
.lang-switch a{padding:6px 11px;color:var(--dim);transition:.18s}
.lang-switch a.on{background:#9C6E13;color:#FFFFFF}
.lang-switch a:not(.on):hover{color:var(--gold)}

.nav-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--hair-2)}
.nav-toggle span{display:block;width:16px;height:1px;background:var(--text);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:16px;height:1px;background:var(--text)}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}

/* ---------- Hero ---------- */

.hero{position:relative;padding:clamp(48px,7vw,96px) 0 0;overflow:hidden}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:clamp(32px,5vw,72px);align-items:center;
}
.hero h1{
  font-size:clamp(2.05rem,4.4vw,3.4rem);
  line-height:1.16;letter-spacing:-.015em;font-weight:800;
  margin:22px 0 0;
}
.hero h1 .accent{
  color:var(--gold);
  background:linear-gradient(180deg,#C08F22,#94690F 70%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero-sub{
  margin-top:22px;max-width:33em;
  font-size:clamp(1rem,1.35vw,1.1rem);color:var(--muted);line-height:1.85;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-trust{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px 20px;margin-top:30px;
  padding-top:22px;border-top:1px solid var(--hair);
}
.hero-trust li{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;
  color:var(--dim);text-transform:uppercase;
  display:flex;align-items:center;gap:7px;
}
.hero-trust li::before{content:"";width:5px;height:5px;background:var(--copper);flex:none}

.hero-panel{position:relative}
.panel-frame{
  position:relative;
  border:1px solid var(--hair-2);
  background:linear-gradient(160deg,#FFFFFF,#F5F8FC);
  padding:18px;
  box-shadow:0 40px 90px -50px rgba(14,27,46,.35),inset 0 1px 0 rgba(255,255,255,.04);
}
.panel-corners::before,.panel-corners::after{
  content:"";position:absolute;width:14px;height:14px;
  border:1px solid var(--gold);pointer-events:none;
}
.panel-corners::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.panel-corners::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.panel-bar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-bottom:14px;margin-bottom:14px;border-bottom:1px solid var(--hair);
}
.panel-bar .mono{font-size:.62rem}
.panel-bar .dot{width:6px;height:6px;border-radius:50%;background:var(--gold);box-shadow:0 0 8px var(--gold)}
.pcb-svg{width:100%;height:auto;overflow:visible}

.readouts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:14px}
.readout{
  border:1px solid var(--hair);background:#FFFFFF;
  padding:11px 13px;
  transition:border-color .2s ease,transform .2s ease;
}
.readout:hover{border-color:rgba(156,110,19,.55);transform:translateY(-2px)}
.readout .k{font-family:var(--mono);font-size:.6rem;letter-spacing:.16em;color:var(--dim);text-transform:uppercase}
.readout .v{margin-top:5px;font-size:.86rem;color:var(--text);line-height:1.5}

/* ---------- 指标条 ---------- */

.stat-strip{
  position:relative;z-index:2;
  margin-top:clamp(44px,6vw,78px);
  border-top:1px solid var(--hair);border-bottom:1px solid var(--hair);
  background:rgba(255,255,255,.7);
}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:26px 22px;border-left:1px solid var(--hair)}
.stat:first-child{border-left:0}
.stat .n{
  font-family:var(--mono);font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:600;
  color:var(--gold);letter-spacing:-.01em;line-height:1;
}
.stat .n .u{font-size:.5em;color:var(--dim);margin-left:4px;letter-spacing:.06em}
.stat .l{margin-top:9px;font-size:.82rem;color:var(--muted);line-height:1.5}

/* ---------- 板块通用 + 图纸标题栏 ---------- */

.section{padding:clamp(64px,8vw,118px) 0;position:relative}
.section.alt{background:linear-gradient(180deg,rgba(255,255,255,0),rgba(255,255,255,.85),rgba(255,255,255,0))}

.shead{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;flex-wrap:wrap;
  padding-bottom:20px;margin-bottom:clamp(32px,4.4vw,54px);
  border-bottom:1px solid var(--hair);
  position:relative;
}
.shead::after{content:"";position:absolute;left:0;bottom:-1px;width:64px;height:2px;background:var(--gold)}
.shead .lead{max-width:52ch}
.shead h2{
  font-size:clamp(1.6rem,3.1vw,2.35rem);font-weight:800;line-height:1.25;
  letter-spacing:-.01em;margin-top:12px;
}
.shead .en{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.2em;color:var(--dim);
  text-transform:uppercase;padding-bottom:6px;
}
.shead p{margin-top:12px;color:var(--muted);font-size:.97rem}

/* ---------- 能力链条 ---------- */

.chain{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--hair);border:1px solid var(--hair)}
.chain-step{
  background:var(--board);padding:26px 24px 28px;position:relative;
  transition:background .22s ease;
}
.chain-step:hover{background:var(--panel)}
.chain-step .sn{font-family:var(--mono);font-size:.64rem;letter-spacing:.16em;color:var(--gold)}
.chain-step h3{font-size:1.06rem;font-weight:700;margin:12px 0 8px;letter-spacing:.01em}
.chain-step p{color:var(--muted);font-size:.9rem;line-height:1.7}
.chain-step .out{
  margin-top:14px;padding-top:12px;border-top:1px dashed var(--hair);
  font-family:var(--mono);font-size:.66rem;letter-spacing:.06em;color:var(--dim);
}
.chain-step .out b{color:var(--signal);font-weight:500}

/* ---------- 能力网格 ---------- */

.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cap{
  position:relative;padding:26px 24px 28px;
  border:1px solid var(--hair);background:var(--panel);
  transition:border-color .22s ease,transform .22s ease,background .22s ease;
}
.cap::after{content:"";position:absolute;inset:0;pointer-events:none;border:1px solid transparent;transition:border-color .22s ease}
.cap:hover{border-color:transparent;transform:translateY(-3px);background:var(--panel-hi)}
.cap:hover::after{border-color:rgba(156,110,19,.55)}
.cap .ic{width:38px;height:38px;color:var(--gold);margin-bottom:16px}
.cap h3{font-size:1.08rem;font-weight:700;letter-spacing:.01em}
.cap .en{font-family:var(--mono);font-size:.63rem;letter-spacing:.16em;color:var(--dim);text-transform:uppercase;margin-top:6px}
.cap ul{margin-top:16px;display:flex;flex-direction:column;gap:9px}
.cap li{position:relative;padding-left:16px;font-size:.89rem;color:var(--muted);line-height:1.65}
.cap li::before{content:"";position:absolute;left:0;top:.62em;width:5px;height:1px;background:var(--copper)}

/* ---------- 行业板块 ---------- */

.ind-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.plate{
  position:relative;padding:24px 22px 26px;
  border:1px solid var(--hair);background:var(--board);
  transition:transform .22s ease,border-color .22s ease;
}
.plate:hover{transform:translateY(-3px);border-color:rgba(27,108,192,.45)}
.plate .reg{position:absolute;top:9px;right:9px;width:9px;height:9px;border:1px solid var(--hair-2)}
.plate .tag{font-family:var(--mono);font-size:.6rem;letter-spacing:.16em;color:var(--signal);text-transform:uppercase}
.plate h3{font-size:1.02rem;font-weight:700;margin:12px 0 4px}
.plate .en{font-family:var(--mono);font-size:.6rem;letter-spacing:.12em;color:var(--dim)}
.plate p{margin-top:14px;font-size:.87rem;color:var(--muted);line-height:1.7}
.plate .focus{
  margin-top:14px;padding-top:12px;border-top:1px dashed var(--hair);
  font-size:.8rem;color:var(--dim);line-height:1.6;
}
.plate .focus b{color:var(--gold);font-weight:600}

/* ---------- 流程时间轴 ---------- */

.flow{position:relative;margin-top:8px}
.flow::before{
  content:"";position:absolute;left:0;right:0;top:33px;height:1px;
  background:linear-gradient(90deg,var(--gold),var(--hair) 22%,var(--hair) 78%,transparent);
}
.flow-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.flow-step{position:relative}
.flow-step .node{
  width:14px;height:14px;border:1px solid var(--gold);background:var(--ink);
  transform:rotate(45deg);margin:26px 0 22px;
  position:relative;z-index:2;
}
.flow-step .node::after{content:"";position:absolute;inset:3px;background:var(--gold)}
.flow-step .ph{font-family:var(--mono);font-size:.63rem;letter-spacing:.18em;color:var(--gold);text-transform:uppercase}
.flow-step h3{font-size:1.04rem;font-weight:700;margin:8px 0 8px}
.flow-step p{font-size:.88rem;color:var(--muted);line-height:1.7}
.flow-step .del{
  margin-top:13px;padding-top:11px;border-top:1px dashed var(--hair);
  font-family:var(--mono);font-size:.64rem;color:var(--dim);line-height:1.7;
}
.flow-step .del b{display:block;color:var(--signal);font-weight:500;margin-bottom:3px}

/* ---------- 差异点 ---------- */

.diff-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--hair);border:1px solid var(--hair)}
.diff{background:var(--board);padding:28px 24px;transition:background .22s ease}
.diff:hover{background:var(--panel)}
.diff .no{font-family:var(--mono);font-size:.66rem;letter-spacing:.16em;color:var(--gold)}
.diff h3{font-size:1.02rem;font-weight:700;margin:12px 0 9px}
.diff p{font-size:.88rem;color:var(--muted);line-height:1.72}

/* ---------- FAQ ---------- */

.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px 22px;align-items:start}
.faq-item{border:1px solid var(--hair);background:var(--panel);transition:border-color .2s ease}
.faq-item[open]{border-color:rgba(156,110,19,.40);background:var(--panel-hi)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:17px 20px;
  display:flex;align-items:flex-start;gap:14px;
  font-size:.95rem;font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .q{font-family:var(--mono);font-size:.64rem;color:var(--gold);letter-spacing:.1em;padding-top:4px;flex:none}
.faq-item summary .plus{margin-left:auto;flex:none;width:14px;height:14px;position:relative;margin-top:5px}
.faq-item summary .plus::before,.faq-item summary .plus::after{
  content:"";position:absolute;background:var(--gold);transition:transform .22s ease;
}
.faq-item summary .plus::before{left:0;right:0;top:6px;height:1px}
.faq-item summary .plus::after{top:0;bottom:0;left:6px;width:1px}
.faq-item[open] summary .plus::after{transform:rotate(90deg);opacity:0}
.faq-item .ans{padding:0 20px 19px 52px;color:var(--muted);font-size:.91rem;line-height:1.8}

/* ---------- 联系 ---------- */

.contact-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:22px}
.form-card{border:1px solid var(--hair);background:var(--panel);padding:clamp(22px,3vw,34px)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{
  display:block;margin-bottom:7px;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;color:var(--dim);
  text-transform:uppercase;
}
.field input,.field select,.field textarea{
  width:100%;padding:11px 13px;
  background:#F7F9FC;border:1px solid var(--hair);
  color:var(--text);font-family:var(--sans);font-size:.94rem;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.field textarea{resize:vertical;min-height:118px;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#93A1B2}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--gold);
  box-shadow:0 0 0 3px rgba(156,110,19,.13);
}
.field select{
  appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--dim) 50%),linear-gradient(135deg,var(--dim) 50%,transparent 50%);
  background-position:calc(100% - 17px) 19px,calc(100% - 12px) 19px;
  background-size:5px 5px;background-repeat:no-repeat;
}
.form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:6px}
.form-note{font-size:.79rem;color:var(--dim);line-height:1.7}
.form-note b{color:var(--copper);font-weight:600}
.form-msg{
  margin-top:14px;padding:11px 14px;border:1px solid rgba(156,110,19,.35);
  background:#FBF3E0;color:#7A5510;font-size:.87rem;
  display:none;
}
.form-msg.show{display:block}

.info-card{border:1px solid var(--hair);background:var(--board);padding:clamp(22px,3vw,32px)}
.info-card h3{font-size:1.05rem;font-weight:700;margin-bottom:18px}
.info-list{display:flex;flex-direction:column}
.info-list li{padding:15px 0;border-top:1px solid var(--hair)}
.info-list li:first-child{border-top:0;padding-top:0}
.info-list .k{font-family:var(--mono);font-size:.62rem;letter-spacing:.15em;color:var(--dim);text-transform:uppercase}
.info-list .v{margin-top:5px;font-size:.94rem;color:var(--text);line-height:1.65}
.info-list .v a{color:var(--signal);border-bottom:1px solid rgba(27,108,192,.35)}
.info-list .v a:hover{color:var(--gold);border-bottom-color:var(--gold)}

/* ---------- 页脚 ---------- */

.site-footer{border-top:1px solid var(--hair);background:#E5EAF1;padding:44px 0 30px}
.footer-top{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;align-items:flex-start}
.footer-brand p{margin-top:12px;max-width:34em;color:var(--dim);font-size:.85rem;line-height:1.8}
.footer-cols{display:flex;gap:46px;flex-wrap:wrap}
.footer-col .k{font-family:var(--mono);font-size:.62rem;letter-spacing:.15em;color:var(--dim);text-transform:uppercase;margin-bottom:12px}
.footer-col a{display:block;font-size:.88rem;color:var(--muted);padding:4px 0;transition:color .18s}
.footer-col a:hover{color:var(--gold)}
.footer-bottom{
  margin-top:34px;padding-top:20px;border-top:1px solid var(--hair);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.08em;color:var(--dim);
}

/* ---------- 动效 ---------- */

.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

@keyframes dash{to{stroke-dashoffset:-220}}
.trace-live{stroke-dasharray:26 194;animation:dash 5.5s linear infinite}
.trace-live.b{animation-duration:7.5s;animation-delay:-2s}
.trace-live.c{animation-duration:9s;animation-delay:-4s}
@keyframes pulse{0%,100%{opacity:.25}50%{opacity:.9}}
.node-live{animation:pulse 3.4s ease-in-out infinite}

/* ---------- 响应式 ---------- */

@media (max-width:1080px){
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .ind-grid{grid-template-columns:repeat(2,1fr)}
  .diff-grid{grid-template-columns:repeat(2,1fr)}
  .flow-grid{grid-template-columns:repeat(2,1fr);gap:26px 20px}
  .flow::before{display:none}
  .flow-step .node{margin:0 0 16px}
  .chain{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .contact-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(3){border-left:0}
  .stat:nth-child(n+3){border-top:1px solid var(--hair)}
  .nav{
    position:fixed;inset:72px 0 auto 0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#FFFFFF;
    border-bottom:1px solid var(--hair);
    padding:8px var(--pad) 20px;
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity .2s ease,transform .2s ease;
  }
  .nav.open{opacity:1;transform:none;pointer-events:auto}
  .nav a{padding:13px 0;border-bottom:1px solid var(--hair)}
  .nav-toggle{display:flex}
  .header-right .btn{display:none}
  .hero-trust{grid-template-columns:1fr}
}
@media (max-width:640px){
  .cap-grid{grid-template-columns:1fr}
  .ind-grid{grid-template-columns:1fr}
  .diff-grid{grid-template-columns:1fr}
  .chain{grid-template-columns:1fr}
  .flow-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .readouts{grid-template-columns:1fr}
  .hero-cta .btn{flex:1 1 100%}
  .brand-en{display:none}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
}


/* ============================================================
   动效层 R2 — 全站共用（新页面直接继承）
   ============================================================ */

/* ---------- 顶部滚动进度条 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--signal),var(--gold) 70%,var(--copper));
  z-index:200;pointer-events:none;will-change:transform;
}

/* ---------- 开场序列 ---------- */
body.intro .eyebrow,
body.intro .hero h1,
body.intro .hero-sub,
body.intro .hero-cta,
body.intro .hero-trust,
body.intro .hero-panel,
body.intro .page-head,
body.intro .page-head > *{opacity:0;transform:translateY(16px)}

body.ready .eyebrow{opacity:1;transform:none;transition:opacity .55s ease .04s,transform .55s cubic-bezier(.2,.7,.3,1) .04s}
body.ready .hero h1{opacity:1;transform:none;transition:opacity .7s ease .16s}
body.ready .hero-sub{opacity:1;transform:none;transition:opacity .7s ease .30s,transform .7s cubic-bezier(.2,.7,.3,1) .30s}
body.ready .hero-cta{opacity:1;transform:none;transition:opacity .7s ease .42s,transform .7s cubic-bezier(.2,.7,.3,1) .42s}
body.ready .hero-trust{opacity:1;transform:none;transition:opacity .7s ease .54s,transform .7s cubic-bezier(.2,.7,.3,1) .54s}
body.ready .hero-panel{opacity:1;transform:none;transition:opacity .9s ease .26s,transform .9s cubic-bezier(.2,.7,.3,1) .26s}
body.ready .page-head{opacity:1;transform:none;transition:opacity .6s ease .1s,transform .6s cubic-bezier(.2,.7,.3,1) .1s}
body.ready .page-head > *{opacity:1;transform:none;transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.3,1)}

/* ---------- 标题逐字落下 ---------- */
.hero h1 .ch{
  display:inline-block;
  opacity:0;transform:translateY(.42em) rotateX(-55deg);
  transform-origin:50% 100%;
}
body.ready .hero h1 .ch{
  opacity:1;transform:none;
  transition:opacity .5s ease,transform .6s cubic-bezier(.18,.85,.3,1);
}

/* ---------- 数字滚动 ---------- */
.count{font-variant-numeric:tabular-nums}

/* ---------- 板块标题金线展开 ---------- */
.shead::after{
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .8s cubic-bezier(.2,.7,.3,1) .12s;
}
.shead.reveal.in::after{transform:scaleX(1)}

/* ---------- 卡片 3D 倾斜 + 指针光斑 ---------- */
.cap,.plate,.diff,.chain-step{
  transform:perspective(1000px)
            rotateX(var(--rx,0deg))
            rotateY(var(--ry,0deg))
            translateY(var(--ty,0px));
  will-change:transform;
}
.cap::after{
  background:radial-gradient(260px circle at var(--mx,50%) var(--my,50%),
             rgba(227,178,78,.16),transparent 62%);
  opacity:0;
}
.cap:hover::after{opacity:1}
.plate::after{
  content:"";position:absolute;inset:0;pointer-events:none;border-radius:inherit;
  background:radial-gradient(260px circle at var(--mx,50%) var(--my,50%),
             rgba(87,184,255,.13),transparent 62%);
  opacity:0;transition:opacity .3s ease;
}
.plate:hover::after{opacity:1}
.plate:hover{--ty:-4px}
.cap:hover{--ty:-4px}

/* ---------- 跑马灯 ---------- */
.marquee{
  border-top:1px solid var(--hair);border-bottom:1px solid var(--hair);
  background:rgba(255,255,255,.6);
  overflow:hidden;position:relative;
}
.marquee::before,.marquee::after{
  content:"";position:absolute;top:0;bottom:0;width:90px;z-index:2;pointer-events:none;
}
.marquee::before{left:0;background:linear-gradient(90deg,var(--ink),transparent)}
.marquee::after{right:0;background:linear-gradient(270deg,var(--ink),transparent)}
.marquee-track{
  display:flex;width:max-content;gap:0;
  animation:marquee 42s linear infinite;
}
.marquee:hover .marquee-track{animation-play-state:paused}
.marquee-track span{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--dim);padding:14px 22px;white-space:nowrap;
  display:inline-flex;align-items:center;gap:22px;
}
.marquee-track span::after{
  content:"";width:4px;height:4px;background:var(--gold);opacity:.55;flex:none;
}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- AOI 扫描（Hero 电路板） ---------- */
.aoi-bar{animation:aoi 7.5s cubic-bezier(.5,0,.5,1) infinite}
@keyframes aoi{
  0%{transform:translateY(-90px)}
  55%{transform:translateY(346px)}
  100%{transform:translateY(346px)}
}

/* ---------- FAQ 答案淡入 ---------- */
.faq-item[open] .ans{animation:ansIn .38s cubic-bezier(.2,.7,.3,1)}
@keyframes ansIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:80;
  width:46px;height:46px;display:grid;place-items:center;
  background:rgba(255,255,255,.92);border:1px solid var(--hair-2);
  color:var(--gold);opacity:0;pointer-events:none;transform:translateY(12px);
  transition:opacity .25s ease,transform .25s ease,border-color .2s ease,background .2s ease;
  backdrop-filter:blur(8px);
}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{border-color:var(--gold);background:var(--gold);color:#fff}

/* ---------- 轻量延时（数字滚动后到位的强调闪动） ---------- */
@keyframes pop{0%{transform:scale(.94)}60%{transform:scale(1.06)}100%{transform:scale(1)}}
.stat.counted .n{animation:pop .5s cubic-bezier(.2,.8,.3,1)}

@media (prefers-reduced-motion:reduce){
  .aoi-bar,.marquee-track{animation:none !important}
  .marquee-track{transform:none !important}
  .hero h1 .ch{opacity:1 !important;transform:none !important}
  .shead::after{transform:scaleX(1) !important}
}


/* ============================================================
   内页组件层 R3 — 多页站共用
   ============================================================ */

/* ---------- 面包屑 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin-bottom:18px}
.crumb a{color:var(--dim);transition:color .18s}
.crumb a:hover{color:var(--gold)}
.crumb .sep{opacity:.45}

/* ---------- 内页标题区 ---------- */
.page-head{
  position:relative;
  padding:clamp(34px,5vw,64px) 0 clamp(30px,4vw,48px);
  border-bottom:1px solid var(--hair);
  margin-bottom:clamp(34px,4.5vw,60px);
}
.page-head::after{
  content:"";position:absolute;left:0;bottom:-1px;width:78px;height:2px;background:var(--gold);
  transform:scaleX(0);transform-origin:0 50%;transition:transform .8s cubic-bezier(.2,.7,.3,1) .2s;
}
.page-head.reveal.in::after{transform:scaleX(1)}
.page-head h1{
  font-size:clamp(1.85rem,4vw,3rem);font-weight:800;line-height:1.2;
  letter-spacing:-.015em;margin:14px 0 0;max-width:20ch;
}
.page-head h1 .accent{
  color:var(--gold);
  background:linear-gradient(180deg,#C08F22,#94690F 70%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.page-head .sub{margin-top:18px;max-width:56ch;color:var(--muted);font-size:clamp(.98rem,1.25vw,1.08rem);line-height:1.8}
.page-head .meta{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:22px}

/* ---------- 通用两栏 ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.62fr);gap:clamp(26px,4vw,56px);align-items:start}
.split-wide{grid-template-columns:minmax(0,1.35fr) minmax(0,.65fr)}

/* ---------- 侧栏 TOC ---------- */
.toc{
  position:sticky;top:96px;
  border:1px solid var(--hair);background:rgba(255,255,255,.72);
  padding:20px 22px;
}
.toc .k{font-family:var(--mono);font-size:.62rem;letter-spacing:.16em;color:var(--dim);text-transform:uppercase;margin-bottom:12px}
.toc a{display:block;padding:7px 0;font-size:.88rem;color:var(--muted);border-left:2px solid transparent;padding-left:12px;transition:.18s}
.toc a:hover{color:var(--gold);border-left-color:var(--gold)}

/* ---------- 正文排版 ---------- */
.prose{max-width:76ch}
.prose h2{font-size:clamp(1.25rem,2.2vw,1.6rem);font-weight:800;margin:clamp(34px,4vw,52px) 0 14px;letter-spacing:-.01em}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:1.08rem;font-weight:700;margin:28px 0 10px}
.prose p{color:var(--muted);line-height:1.85;margin:14px 0}
.prose strong{color:var(--text);font-weight:700}
.prose ul,.prose ol{margin:14px 0;display:flex;flex-direction:column;gap:9px}
.prose li{position:relative;padding-left:18px;color:var(--muted);line-height:1.75}
.prose ul>li::before{content:"";position:absolute;left:0;top:.68em;width:6px;height:1px;background:var(--copper)}
.prose ol{counter-reset:pl}
.prose ol>li{counter-increment:pl}
.prose ol>li::before{
  content:counter(pl,decimal-leading-zero);position:absolute;left:0;top:.1em;
  font-family:var(--mono);font-size:.7rem;color:var(--gold);
}
.prose code{
  font-family:var(--mono);font-size:.86em;background:rgba(14,27,46,.05);
  border:1px solid var(--hair);padding:1px 6px;color:#7A5510;
}
.prose blockquote{
  margin:22px 0;padding:14px 20px;border-left:2px solid var(--gold);
  background:rgba(227,178,78,.06);color:var(--muted);line-height:1.8;
}

/* ---------- 数据表 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--hair);background:rgba(255,255,255,.72)}
table.dt{width:100%;border-collapse:collapse;font-size:.9rem;min-width:520px}
table.dt th{
  text-align:left;font-family:var(--mono);font-size:.64rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--dim);font-weight:500;padding:13px 16px;border-bottom:1px solid var(--hair);white-space:nowrap;
}
table.dt td{padding:13px 16px;border-bottom:1px solid var(--hair);color:var(--muted);vertical-align:top}
table.dt tr:last-child td{border-bottom:0}
table.dt tbody tr{transition:background .18s}
table.dt tbody tr:hover{background:rgba(227,178,78,.05)}
table.dt td strong{color:var(--text)}

/* ---------- 清单卡片 ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.check{
  display:flex;gap:12px;align-items:flex-start;
  border:1px solid var(--hair);background:rgba(255,255,255,.72);padding:15px 17px;
  transition:border-color .2s ease,transform .2s ease,background .2s ease;
}
.check:hover{border-color:rgba(156,110,19,.4);transform:translateY(-2px);background:#fff}
.check .ck{
  width:18px;height:18px;flex:none;margin-top:2px;border:1px solid var(--gold);
  display:grid;place-items:center;color:var(--gold);font-size:.7rem;
}
.check .t{font-size:.93rem;font-weight:600;color:var(--text)}
.check .d{font-size:.82rem;color:var(--dim);margin-top:4px;line-height:1.6}

/* ---------- 提示块 ---------- */
.note{
  border:1px solid var(--hair);border-left:2px solid var(--signal);
  background:rgba(255,255,255,.72);padding:16px 20px;
}
.note .k{font-family:var(--mono);font-size:.62rem;letter-spacing:.15em;color:var(--signal);text-transform:uppercase;margin-bottom:6px}
.note p{color:var(--muted);font-size:.9rem;line-height:1.75}
.note.gold{border-left-color:var(--gold)}
.note.gold .k{color:var(--gold)}

/* ---------- 筛选条（案例 / 能力页） ---------- */
.filterbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.chip{
  padding:7px 15px;border:1px solid var(--hair-2);background:rgba(255,255,255,.6);
  font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);
  transition:.2s ease;cursor:pointer;
}
.chip:hover{border-color:var(--gold);color:var(--gold)}
.chip.on{background:var(--gold);border-color:var(--gold);color:#fff}
.chip .n{opacity:.65;margin-left:6px}

/* ---------- 文章卡 ---------- */
.art-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.art{
  display:flex;flex-direction:column;
  border:1px solid var(--hair);background:rgba(255,255,255,.72);padding:24px 22px 26px;
  transition:transform .22s ease,border-color .22s ease,background .22s ease;
}
.art:hover{transform:translateY(-3px);border-color:rgba(156,110,19,.45);background:#fff}
.art .cat{font-family:var(--mono);font-size:.6rem;letter-spacing:.15em;color:var(--signal);text-transform:uppercase}
.art h3{font-size:1.05rem;font-weight:700;margin:11px 0 9px;line-height:1.45}
.art p{font-size:.88rem;color:var(--muted);line-height:1.72;flex:1}
.art .foot{margin-top:16px;padding-top:13px;border-top:1px dashed var(--hair);display:flex;justify-content:space-between;align-items:center;gap:10px;font-family:var(--mono);font-size:.64rem;color:var(--dim);letter-spacing:.08em}
.art .foot a{color:var(--gold)}

/* ---------- 标签页 ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:2px;border-bottom:1px solid var(--hair);margin-bottom:26px}
.tab{
  padding:11px 18px;font-size:.9rem;color:var(--muted);border-bottom:2px solid transparent;
  transition:.18s ease;cursor:pointer;background:none;
}
.tab:hover{color:var(--text)}
.tab.on{color:var(--gold);border-bottom-color:var(--gold)}
.tabpanel{display:none}
.tabpanel.on{display:block}

/* ---------- 键值网格 ---------- */
.kv-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--hair);border:1px solid var(--hair)}
.kv{background:rgba(255,255,255,.8);padding:18px 20px}
.kv .k{font-family:var(--mono);font-size:.62rem;letter-spacing:.15em;color:var(--dim);text-transform:uppercase}
.kv .v{margin-top:6px;font-size:.93rem;color:var(--text);line-height:1.6}

/* ---------- 团队画像卡 ---------- */
.role-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.role{border:1px solid var(--hair);background:rgba(255,255,255,.72);padding:22px 20px;transition:.22s}
.role:hover{border-color:rgba(156,110,19,.42);transform:translateY(-3px)}
.role .ic{width:34px;height:34px;color:var(--gold);margin-bottom:14px}
.role h3{font-size:1rem;font-weight:700}
.role .en{font-family:var(--mono);font-size:.6rem;letter-spacing:.14em;color:var(--dim);text-transform:uppercase;margin-top:5px}
.role p{font-size:.85rem;color:var(--muted);line-height:1.7;margin-top:12px}

/* ---------- CTA 条 ---------- */
.cta-band{
  border:1px solid var(--hair-2);background:linear-gradient(120deg,#fff,rgba(227,178,78,.06));
  padding:clamp(28px,4vw,48px);display:flex;align-items:center;justify-content:space-between;
  gap:26px;flex-wrap:wrap;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;
  border:1px solid rgba(227,178,78,.25);border-radius:50%;
}
.cta-band h3{font-size:clamp(1.15rem,2.2vw,1.55rem);font-weight:800;letter-spacing:-.01em}
.cta-band p{margin-top:8px;color:var(--muted);font-size:.94rem;max-width:46ch}
.cta-band .acts{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:2}

/* ---------- 步骤条（内页） ---------- */
.stepgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.stepbox{border:1px solid var(--hair);background:rgba(255,255,255,.72);padding:24px 22px;position:relative;transition:.22s}
.stepbox:hover{border-color:rgba(156,110,19,.4);transform:translateY(-3px)}
.stepbox .n{font-family:var(--mono);font-size:.66rem;letter-spacing:.16em;color:var(--gold)}
.stepbox h3{font-size:1.03rem;font-weight:700;margin:11px 0 8px}
.stepbox p{font-size:.88rem;color:var(--muted);line-height:1.72}
.stepbox ul{margin-top:12px;display:flex;flex-direction:column;gap:7px}
.stepbox li{position:relative;padding-left:15px;font-size:.83rem;color:var(--dim);line-height:1.6}
.stepbox li::before{content:"";position:absolute;left:0;top:.62em;width:5px;height:1px;background:var(--copper)}

@media (max-width:1080px){
  .split,.split-wide{grid-template-columns:1fr}
  .toc{position:static}
  .art-grid{grid-template-columns:repeat(2,1fr)}
  .role-grid{grid-template-columns:repeat(2,1fr)}
  .stepgrid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .check-grid,.kv-grid,.art-grid,.role-grid,.stepgrid{grid-template-columns:1fr}
}


/* ---------- 技术文章展开卡 ---------- */
.art-list{display:flex;flex-direction:column;gap:12px}
.art-item{border:1px solid var(--hair);background:rgba(255,255,255,.72);transition:border-color .22s ease,background .22s ease}
.art-item[open]{border-color:rgba(156,110,19,.4);background:#fff}
.art-item summary{
  list-style:none;cursor:pointer;padding:20px 22px;
  display:flex;align-items:flex-start;gap:16px;flex-wrap:wrap;
}
.art-item summary::-webkit-details-marker{display:none}
.art-item summary .q{
  font-family:var(--mono);font-size:.6rem;letter-spacing:.14em;color:var(--signal);
  text-transform:uppercase;padding-top:5px;flex:none;min-width:76px;
}
.art-item summary .tt{font-size:1.04rem;font-weight:700;flex:1;min-width:240px;line-height:1.5}
.art-item summary .rr{
  font-family:var(--mono);font-size:.64rem;color:var(--dim);
  letter-spacing:.1em;padding-top:6px;flex:none;
}
.art-item summary .plus{margin-left:auto;flex:none;width:14px;height:14px;position:relative;margin-top:6px}
.art-item summary .plus::before,.art-item summary .plus::after{
  content:"";position:absolute;background:var(--gold);transition:transform .22s ease;
}
.art-item summary .plus::before{left:0;right:0;top:6px;height:1px}
.art-item summary .plus::after{top:0;bottom:0;left:6px;width:1px}
.art-item[open] summary .plus::after{transform:rotate(90deg);opacity:0}
.art-item .abody{padding:0 22px 26px 114px}
.art-item .abody h2:first-child{margin-top:0}
@media (max-width:640px){
  .art-item .abody{padding:0 20px 22px 20px}
}

/* 英文导航标签更长，按语言与断点收紧 */
html[lang="en"] .nav a{font-size:.8rem;padding:9px 8px}
@media (max-width:1240px){
  .nav a{font-size:.78rem;padding:9px 7px}
  html[lang="en"] .nav a{font-size:.76rem;padding:9px 6px}
  .brand-en{display:none}
  .header-inner{gap:12px}
}

/* 导航在 1080 以下收起为汉堡菜单（9 项导航在窄屏必然溢出） */
@media (max-width:1080px){
  .nav{
    position:fixed;inset:72px 0 auto 0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#FFFFFF;
    border-bottom:1px solid var(--hair);
    padding:8px var(--pad) 20px;
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity .2s ease,transform .2s ease;
  }
  .nav.open{opacity:1;transform:none;pointer-events:auto}
  .nav a{padding:13px 0;border-bottom:1px solid var(--hair);font-size:.95rem;white-space:normal}
  .nav a::after{display:none}
  .nav-toggle{display:flex}
  .header-right .btn{display:none}
}