/* ===========================================================
   raogao.com — 安阳超高 · UHMWPE 机加工配件
   设计体系：「车间图纸」深色工业。密集行式目录，非卡片流。
   =========================================================== */
:root{
  --bg:#0c0e11;
  --surface:#13161b;
  --surface-2:#181c22;
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);
  --ink:#e9e7e2;
  --ink-dim:#9aa0a8;
  --ink-faint:#6b7178;
  --accent:#ff6b1a;
  --accent-soft:rgba(255,107,26,.12);
  --rail:84px;
  --max:1440px;
  --ease:cubic-bezier(.16,1,.3,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;
  padding-left:var(--rail);
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:#0c0e11}
.wrap{max-width:var(--max);margin:0 auto;padding:0 clamp(20px,3vw,56px)}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- 左侧竖向导轨 ---------- */
.rail{
  position:fixed;left:0;top:0;bottom:0;width:var(--rail);z-index:60;
  border-right:1px solid var(--line);background:rgba(12,14,17,.86);
  backdrop-filter:blur(14px);
  display:flex;flex-direction:column;align-items:center;justify-content:space-between;
  padding:26px 0 22px;
}
.rail .mark{
  width:44px;height:44px;border:1px solid var(--line-strong);
  display:grid;place-items:center;font-size:19px;font-weight:800;letter-spacing:.5px;
  color:var(--ink);
}
.rail .mark:hover{border-color:var(--accent);color:var(--accent)}
.rail nav{display:flex;flex-direction:column;gap:34px;align-items:center}
.rail nav a{
  writing-mode:vertical-rl;font-size:11.5px;letter-spacing:.42em;color:var(--ink-faint);
  transition:color .3s var(--ease);position:relative;padding:2px 0;
}
.rail nav a:hover,.rail nav a.on{color:var(--ink)}
.rail nav a.on::before{
  content:"";position:absolute;left:-9px;top:0;width:2px;height:100%;background:var(--accent);
}
.rail .tel{
  writing-mode:vertical-rl;font-size:11px;letter-spacing:.18em;color:var(--ink-faint);
}
.rail .tel b{color:var(--accent);font-weight:600}

/* ---------- 顶栏 ---------- */
.topbar{
  border-bottom:1px solid var(--line);font-size:12.5px;color:var(--ink-faint);
}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:44px;gap:20px}
.topbar .left{display:flex;gap:18px;align-items:center}
.topbar .dot{width:5px;height:5px;background:#3ecf8e;border-radius:50%;box-shadow:0 0 0 3px rgba(62,207,142,.14)}
.topbar a:hover{color:var(--accent)}

/* ---------- HERO ---------- */
.hero{position:relative;border-bottom:1px solid var(--line);overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),
                   linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:72px 72px;opacity:.5;
  mask-image:radial-gradient(120% 90% at 20% 10%,#000 30%,transparent 75%);
}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(24px,4vw,60px);align-items:center;padding-top:clamp(44px,5vw,72px);padding-bottom:clamp(44px,5vw,72px)}
.hero .eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.28em;
  color:var(--ink-faint);text-transform:uppercase;margin-bottom:26px;
}
.hero .eyebrow::before{content:"";width:34px;height:1px;background:var(--accent)}
.hero h1{
  font-size:clamp(2rem,3.9vw,3.45rem);line-height:1.12;font-weight:800;
  letter-spacing:-.028em;
;text-wrap:balance}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero .lede{
  margin-top:24px;max-width:34em;color:var(--ink-dim);font-size:16.5px;line-height:1.9;
}
.hero .lede b{color:var(--ink);font-weight:600}
.hero .acts{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}

.btn{
  display:inline-flex;align-items:center;gap:10px;height:50px;padding:0 26px;
  font-size:14.5px;font-weight:600;letter-spacing:.02em;border:1px solid var(--line-strong);
  transition:transform .25s var(--ease),background .25s,border-color .25s,color .25s;
}
.btn svg{width:15px;height:15px;flex:0 0 auto}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:scale(.985)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#12100d}
.btn-primary:hover{background:#ff8340;border-color:#ff8340}
.btn-ghost:hover{border-color:var(--ink);background:rgba(255,255,255,.03)}

/* hero 数据条 */
.hero-side{align-self:center;display:flex;flex-direction:column;gap:1px;background:var(--line)}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line)}
.stat{background:var(--bg);padding:20px 18px 22px}
.stat b{display:block;font-size:clamp(1.8rem,3vw,2.5rem);font-weight:700;letter-spacing:-.03em;line-height:1}
.stat b i{font-style:normal;font-size:.44em;font-weight:500;color:var(--ink-faint);margin-left:5px;letter-spacing:0}
.stat span{display:block;margin-top:9px;font-size:12px;color:var(--ink-faint);letter-spacing:.12em}
.hero-shot{position:relative;border:1px solid var(--line);overflow:hidden;background:var(--surface)}
.hero-shot img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;opacity:.92}
.hero-shot figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:12px 16px;font-size:11.5px;letter-spacing:.1em;
  color:var(--ink-dim);background:linear-gradient(transparent,rgba(10,12,15,.92));
}

/* ---------- 跑马灯 ---------- */
.marquee{border-bottom:1px solid var(--line);overflow:hidden;background:var(--surface);position:relative}
.marquee-in{display:flex;gap:0;width:max-content;animation:mv 42s linear infinite}
.marquee:hover .marquee-in{animation-play-state:paused}
.marquee span{
  display:inline-flex;align-items:center;gap:16px;padding:15px 26px;font-size:13px;
  letter-spacing:.14em;color:var(--ink-dim);white-space:nowrap;
}
.marquee span::after{content:"";width:4px;height:4px;background:var(--accent);opacity:.7}
@keyframes mv{to{transform:translateX(-50%)}}

/* ---------- 区块通用 ---------- */
section{padding:clamp(56px,7vw,104px) 0}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:clamp(28px,3.4vw,48px)}
.sec-head .idx{
  font-size:12px;letter-spacing:.3em;color:var(--accent);margin-bottom:14px;display:block;
}
.sec-head h2{font-size:clamp(1.7rem,3.1vw,2.65rem);line-height:1.14;font-weight:800;letter-spacing:-.028em}
.sec-head p{color:var(--ink-dim);max-width:32em;font-size:15px;line-height:1.85}
.sec-head .aside{flex:0 0 auto;text-align:right;color:var(--ink-faint);font-size:12.5px;letter-spacing:.1em}

/* ---------- 产品索引（行式，不用卡片） ---------- */
.cat-list{border-top:1px solid var(--line)}
.cat-row{
  display:grid;grid-template-columns:64px 1.25fr 1.1fr 130px 54px;align-items:center;gap:22px;
  padding:22px 8px;border-bottom:1px solid var(--line);position:relative;
  transition:background .3s var(--ease),padding-left .3s var(--ease);
}
.cat-row::after{
  content:"";position:absolute;left:0;top:-1px;bottom:-1px;width:0;background:var(--accent-soft);
  transition:width .35s var(--ease);pointer-events:none;
}
.cat-row:hover{padding-left:18px}
.cat-row:hover::after{width:100%}
.cat-row > *{position:relative}
.cat-row .no{font-size:12.5px;color:var(--ink-faint);letter-spacing:.1em}
.cat-row .nm{font-size:clamp(1.05rem,1.7vw,1.35rem);font-weight:700;letter-spacing:-.01em}
.cat-row .nm small{display:block;font-size:11.5px;font-weight:400;color:var(--ink-faint);letter-spacing:.16em;margin-top:4px;text-transform:uppercase}
.cat-row .desc{font-size:13.5px;color:var(--ink-dim);line-height:1.7}
.cat-row .qty{font-size:13px;color:var(--ink-dim);text-align:right}
.cat-row .qty b{color:var(--ink);font-size:16px;font-weight:700}
.cat-row .go{
  width:38px;height:38px;border:1px solid var(--line-strong);display:grid;place-items:center;
  justify-self:end;transition:.3s var(--ease);color:var(--ink-dim);
}
.cat-row:hover .go{background:var(--accent);border-color:var(--accent);color:#12100d;transform:rotate(-45deg)}
.cat-row .go svg{width:14px;height:14px}

/* ---------- 参数表 ---------- */
.spec-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(26px,4vw,64px);align-items:start}
table.spec{width:100%;border-collapse:collapse;font-size:14px}
table.spec th,table.spec td{padding:13px 4px;border-bottom:1px solid var(--line);text-align:left}
table.spec th{color:var(--ink-faint);font-weight:400;width:56%;font-size:13.5px}
table.spec td{text-align:right;font-weight:600;letter-spacing:.01em}
table.spec td small{display:block;font-weight:400;font-size:11.5px;color:var(--ink-faint)}
table.spec tr:hover td{color:var(--accent)}
.spec-note{margin-top:16px;font-size:12px;color:var(--ink-faint);line-height:1.8}
.spec-side{border:1px solid var(--line);padding:clamp(20px,2.4vw,30px);background:var(--surface)}
.spec-side h3{font-size:15px;letter-spacing:.06em;margin-bottom:16px}
.spec-side ul{list-style:none;display:flex;flex-direction:column;gap:14px}
.spec-side li{display:flex;gap:12px;font-size:13.5px;color:var(--ink-dim);line-height:1.7}
.spec-side li::before{content:"";flex:0 0 auto;width:5px;height:5px;margin-top:9px;background:var(--accent)}
.spec-side li b{color:var(--ink);font-weight:600}

/* ---------- 流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.flow .step{background:var(--bg);padding:clamp(20px,2.4vw,32px);position:relative}
.flow .step .n{font-size:12px;letter-spacing:.24em;color:var(--accent);margin-bottom:40px;display:block}
.flow .step h4{font-size:16.5px;font-weight:700;margin-bottom:10px}
.flow .step p{font-size:13px;color:var(--ink-dim);line-height:1.8}
.flow .step::after{content:"";position:absolute;right:-4px;top:0;bottom:0;width:1px;background:transparent}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;padding:22px 40px 22px 0;position:relative;
  font-size:16px;font-weight:600;letter-spacing:-.005em;transition:color .25s;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:6px;top:50%;width:9px;height:9px;
  border-right:1.5px solid var(--ink-faint);border-bottom:1.5px solid var(--ink-faint);
  transform:translateY(-70%) rotate(45deg);transition:.35s var(--ease);
}
.faq details[open] summary{color:var(--accent)}
.faq details[open] summary::after{transform:translateY(-30%) rotate(225deg);border-color:var(--accent)}
.faq .a{padding:0 60px 24px 0;color:var(--ink-dim);font-size:14.5px;line-height:1.9}

/* ---------- 询价 ---------- */
.inq{border-top:1px solid var(--line);background:var(--surface)}
.inq .wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(28px,4vw,72px);padding-top:clamp(52px,6vw,84px);padding-bottom:clamp(52px,6vw,84px)}
.inq-copy h2{font-size:clamp(1.7rem,3.2vw,2.7rem);line-height:1.12;font-weight:800;letter-spacing:-.028em}
.inq-copy p{margin-top:18px;color:var(--ink-dim);line-height:1.9;font-size:15px;max-width:26em}
.inq-copy .tel{margin-top:30px;display:flex;flex-direction:column;gap:6px}
.inq-copy .tel span{font-size:12px;letter-spacing:.2em;color:var(--ink-faint)}
.inq-copy .tel b{font-size:clamp(1.5rem,2.6vw,2rem);font-weight:700;letter-spacing:-.01em}
.inq-copy .tel b:hover{color:var(--accent)}

form.inq-form{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:12px;letter-spacing:.14em;color:var(--ink-faint)}
.field input,.field select,.field textarea{
  background:var(--bg);border:1px solid var(--line-strong);color:var(--ink);
  padding:13px 14px;font-size:14px;font-family:inherit;border-radius:0;
  transition:border-color .25s,box-shadow .25s;width:100%;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,107,26,.13);
}
.field textarea{resize:vertical;min-height:96px}
.field .err{font-size:11.5px;color:#ff8f6b;display:none}
.field.invalid input,.field.invalid textarea{border-color:#ff8f6b}
.field.invalid .err{display:block}
.inq-form .submit{grid-column:1/-1;display:flex;align-items:center;gap:16px;margin-top:6px}
.inq-form .submit p{font-size:11.5px;color:var(--ink-faint);line-height:1.7}
.inq-form button{height:50px;padding:0 30px;background:var(--accent);border:0;color:#12100d;
  font-size:15px;font-weight:700;font-family:inherit;cursor:pointer;transition:.25s var(--ease)}
.inq-form button:hover{background:#ff8340;transform:translateY(-2px)}
.inq-form button:active{transform:scale(.985)}

/* ---------- 页脚 ---------- */
footer{border-top:1px solid var(--line);padding:clamp(40px,5vw,64px) 0 26px;font-size:13.5px;color:var(--ink-dim)}
footer .cols{display:grid;grid-template-columns:1.6fr .78fr .78fr 1.02fr;gap:clamp(22px,2.6vw,38px);padding-bottom:36px}
footer b{display:block;color:var(--ink);font-size:14px;margin-bottom:14px;letter-spacing:.02em}
footer p,footer li{line-height:2;font-size:13px;color:var(--ink-faint)}
footer ul{list-style:none}
footer a:hover{color:var(--accent)}
footer .cp{border-top:1px solid var(--line);padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--ink-faint)}

/* ---------- 进场动画 ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.rv.in{opacity:1;transform:none}
.rv[data-d="1"]{transition-delay:.08s}
.rv[data-d="2"]{transition-delay:.16s}
.rv[data-d="3"]{transition-delay:.24s}
@media (prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
  .marquee-in{animation:none}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .hero .wrap{grid-template-columns:1fr;gap:32px}
  .hero-side{max-width:560px}
  .spec-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr 1fr}
  .inq .wrap{grid-template-columns:1fr}
  .cat-row{grid-template-columns:48px 1fr 110px 46px;gap:14px}
  .cat-row .desc{display:none}
}
@media (max-width:900px){
  body{padding-left:0}
  .rail{display:none}
  footer .cols{grid-template-columns:1fr 1fr;gap:24px}
}
@media (max-width:680px){
  .hero h1{font-size:2.1rem}
  .stats{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:1fr}
  .cat-row{grid-template-columns:36px 1fr 60px;gap:12px;padding:18px 4px}
  .cat-row .qty{display:none}
  .cat-row .go{width:34px;height:34px}
  .inq form.inq-form{grid-template-columns:1fr}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px}
  .sec-head .aside{text-align:left}
  .topbar .left span:nth-child(2){display:none}
}