/* ============================================================
   SpeedTune 官网样式
   风格: 深色 + 信号橙, 工程感 (等宽字体做编号/参数), 面向海外改装市场
   全部自研, 无外部字体/CDN 依赖 (海外访问快, 也不受墙影响)
   ============================================================ */
:root{
  --bg:#0a0d12; --bg2:#0d1119; --panel:#101520; --panel2:#151c28;
  --line:#1f2735; --line2:#2a3446;
  --txt:#e9eef6; --dim:#8b94a4; --dim2:#5d6779;
  --accent:#f81400; --accent-d:#c60f00; --blue:#2f9bff; --ok:#35c46b; --warn:#ffb020;
  --radius:12px; --radius-s:8px; --wrap:1240px;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--txt);font-family:var(--font);
  font-size:16px;line-height:1.62;-webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
a:hover{color:#fff}
code{font-family:var(--mono);font-size:.92em;color:#cfd8e6}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
.dim{color:var(--dim)}
.small{font-size:13px}
.center{text-align:center}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(26px,3.4vw,44px);font-weight:800}
h2{font-size:clamp(20px,2.2vw,28px);font-weight:750}
h3{font-size:17px;font-weight:700}
p{margin:0 0 1em}

/* ---------- 顶部公告条 ---------- */
.topbar{background:linear-gradient(90deg,#12161f,#0c1017);border-bottom:1px solid var(--line);font-size:12.5px;color:var(--dim)}
.tb-in{display:flex;gap:22px;align-items:center;height:34px;overflow:hidden;white-space:nowrap}
.tb-item:first-child{color:var(--ok)}
.tb-right{margin-left:auto;color:var(--dim2)}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(10,13,18,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:26px;height:100px}
.logo img{height:76px;width:auto}
.menu{display:flex;align-items:center;gap:24px;margin-left:auto;font-size:15px;font-weight:600}
.menu a{color:#c8d1de;padding:6px 0;border-bottom:2px solid transparent}
.menu a:hover,.menu a.on{color:#fff;border-bottom-color:var(--accent)}
.menu .lang{color:var(--dim);font-family:var(--mono);font-size:13px}
.burger{display:none;background:none;border:0;color:var(--txt);font-size:22px;cursor:pointer}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;font-weight:700;
  padding:12px 20px;border-radius:var(--radius-s);border:1px solid var(--accent);cursor:pointer;font-size:15px;
  transition:.16s;font-family:var(--font)}
.btn:hover{background:var(--accent-d);border-color:var(--accent-d);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--line2);color:#d7dfea}
.btn-ghost:hover{background:#161d29;border-color:var(--line2);color:#fff}
.btn-sm{padding:9px 14px;font-size:14px}
.btn-xs{padding:5px 9px;font-size:12.5px;border-radius:6px}
.btn-danger{background:#3a1712;border-color:#5c2419;color:#ff9c82}
.btn-danger:hover{background:#4d1d16}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0 0}

/* ---------- 首页 hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 420px at 78% -10%,rgba(248,20,0,.20),transparent 60%),
    radial-gradient(700px 380px at 8% 10%,rgba(47,155,255,.12),transparent 60%),
    linear-gradient(180deg,#0b0f16,#080a0f);}
.hero:before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:56px 56px;mask-image:radial-gradient(700px 400px at 60% 20%,#000,transparent 78%)}
.hero .wrap{position:relative;padding-top:74px;padding-bottom:64px}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
.hero h1{max-width:20ch}
.lead{font-size:17.5px;color:#b6c0cf;max-width:62ch}
.kpis{display:flex;gap:38px;flex-wrap:wrap;list-style:none;margin:38px 0 0;padding:22px 0 0;border-top:1px solid var(--line)}
.kpis b{display:block;font-family:var(--mono);font-size:19px;color:#fff}
.kpis span{font-size:12.5px;color:var(--dim)}

/* ---------- 区块 ---------- */
.sec{padding:58px 0 8px}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:22px;
  border-bottom:1px solid var(--line);padding-bottom:12px}
.sec-head h2{margin:0}
.sec-head h2:before{content:"";display:inline-block;width:10px;height:10px;background:var(--accent);
  margin-right:10px;border-radius:2px;transform:translateY(-1px)}
.more{color:var(--accent);font-weight:600;font-size:14.5px}

/* ---------- 分类卡 ---------- */
.cats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cat{background:linear-gradient(180deg,var(--panel),#0d1219);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;transition:.18s;position:relative;overflow:hidden}
.cat:hover{border-color:var(--line2);transform:translateY(-2px);color:#fff}
.cat:hover:after{opacity:1}
.cat:after{content:"";position:absolute;left:0;top:0;height:2px;width:100%;background:var(--accent);opacity:0;transition:.2s}
.cat-ico{font-family:var(--mono);font-size:12px;color:var(--accent);border:1px solid var(--line2);
  border-radius:5px;padding:1px 6px;display:inline-block;margin-bottom:10px}
.cat h3{margin-bottom:6px}
.cat p{color:var(--dim);font-size:14px;margin-bottom:10px}
.cat-n{font-size:13px;color:var(--blue);font-weight:600}

/* ---------- 产品卡 ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.pcard{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:.18s}
.pcard:hover{border-color:var(--line2);transform:translateY(-3px);box-shadow:0 14px 30px rgba(0,0,0,.45)}
.pcard-img{display:block;background:#0c1119;aspect-ratio:16/10.5;overflow:hidden}
.pcard-img img,.pcard-img svg{width:100%;height:100%;object-fit:cover}
.pcard-body{padding:16px 17px 18px;display:flex;flex-direction:column;gap:9px;flex:1}
.pcard-meta{display:flex;gap:8px;flex-wrap:wrap}
.pcard h3{font-size:16.5px;margin:2px 0 0}
.pcard h3 a:hover{color:var(--accent)}
.pcard .sum{color:var(--dim);font-size:14px;margin:0;flex:1}
.pcard-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:6px;
  padding-top:12px;border-top:1px solid var(--line)}
.price{font-family:var(--mono);font-weight:700;font-size:19px;color:#fff}
.price em{font-style:normal;font-size:11.5px;color:var(--dim2);letter-spacing:.08em;text-transform:uppercase;display:block}
.price small{font-size:11px;color:var(--dim2);font-weight:400}
.price.big{font-size:30px}
.price.poa{color:var(--warn);font-size:15px;font-family:var(--font)}
.chip{font-size:11.5px;padding:3px 9px;border-radius:20px;background:#171f2c;color:#9aa5b5;border:1px solid var(--line);white-space:nowrap}
.chip.hot,.badge.hot{background:#2a1510;color:#ff8f6c;border-color:#4a2317}
.stock-in_stock{background:#0f2318;color:#5fd996;border-color:#1c3a28}
.stock-made_to_order{background:#231d0f;color:#e2c073;border-color:#3b321a}
.stock-preorder,.stock-out_of_stock{background:#241417;color:#e28a9a;border-color:#3d2027}

/* ---------- 特色条 ---------- */
.band{background:linear-gradient(180deg,#0d1119,#0a0e14);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:56px}
.band-in{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;padding:34px 22px}
.band h4{font-family:var(--mono);font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.band p{color:var(--dim);font-size:14px;margin:0}

/* ---------- 文章卡 ---------- */
.post{display:block;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;transition:.18s}
.post:hover{border-color:var(--line2);transform:translateY(-2px)}
.post time{font-family:var(--mono);font-size:12px;color:var(--dim2)}
.post h3{margin:8px 0}
.post p{color:var(--dim);font-size:14.5px}

/* ---------- CTA 带 ---------- */
.cta-band{margin-top:64px;border-top:1px solid var(--line);
  background:radial-gradient(700px 260px at 85% 0,rgba(248,20,0,.16),transparent 65%),#0c1017}
.cta-band.inline{margin-top:44px;border-radius:var(--radius);border:1px solid var(--line)}
.cta-in{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:38px 22px;flex-wrap:wrap}
.cta-in h2{margin:0 0 6px}
.cta-in p{color:var(--dim);margin:0}

/* ---------- 页头 / 面包屑 ---------- */
.page{padding:26px 0 60px}
.page.narrow{max-width:820px}
.crumbs{font-size:13px;color:var(--dim2);margin-bottom:14px}
.crumbs a{color:var(--dim)}
.crumbs a:hover{color:var(--accent)}
.page-head{margin-bottom:26px}
.page-head h1{margin-bottom:6px}
.big404{font-family:var(--mono);font-size:96px;color:var(--accent);margin:40px 0 0}

/* ---------- 产品列表页 ---------- */
.shop{display:grid;grid-template-columns:250px 1fr;gap:26px;align-items:start}
.side{position:sticky;top:124px}
.side h3{font-size:13px;font-family:var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--dim2);margin-bottom:10px}
.side-link{display:block;padding:9px 12px;border-radius:var(--radius-s);color:#c2ccd9;font-size:14.5px;border:1px solid transparent}
.side-link:hover{background:#131a25;color:#fff}
.side-link.on{background:#171f2c;border-color:var(--line2);color:#fff;font-weight:600}
.side-box{margin-top:20px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.side-box h4{font-size:14px;margin-bottom:6px}
.side-h3{margin-top:20px}
.facets{display:flex;flex-wrap:wrap;gap:6px}
.fchip{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:20px;font-size:13px;
  background:#131a25;color:#c2ccd9;border:1px solid var(--line);font-family:var(--mono);letter-spacing:.02em}
.fchip:hover{background:#171f2c;color:#fff;border-color:var(--line2)}
.fchip.on{background:var(--accent);color:#0d1118;border-color:var(--accent);font-weight:600}
.fchip i{font-style:normal;font-size:11px;opacity:.6}
.chip-eng{border-color:#2c3d55;color:#9fc4ee}
.toolbar{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}
.toolbar input[type=search]{flex:1;min-width:200px}
input,select,textarea{background:#0d121a;border:1px solid var(--line2);color:var(--txt);border-radius:var(--radius-s);
  padding:11px 13px;font-family:var(--font);font-size:15px;width:100%}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(248,20,0,.13)}
.empty{color:var(--dim);padding:40px 0}

/* ---------- 产品详情 ---------- */
.pdetail{display:grid;grid-template-columns:1.08fr .92fr;gap:34px;align-items:start}
.gallery .shot{background:#0c1119;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  height:540px;display:flex;align-items:center;justify-content:center;cursor:zoom-in;position:relative}
.gallery .shot img{height:100%;width:auto;max-width:100%;object-fit:contain;display:block}
.gallery .shot svg{width:100%;height:100%}
.gallery .shot.x-zoom::after{content:"🔍";position:absolute;right:10px;bottom:10px;font-size:13px;line-height:1;
  background:rgba(0,0,0,.5);border:1px solid var(--line);border-radius:6px;padding:5px 8px;pointer-events:none;opacity:.85}
.thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.thumbs button{background:none;border:1px solid var(--line);border-radius:8px;padding:0;cursor:pointer;overflow:hidden;
  height:64px;width:auto;min-width:54px;display:flex;align-items:center;justify-content:center}
.thumbs button:hover{border-color:var(--accent)}
.thumbs img{height:100%;width:auto;max-width:110px;object-fit:contain;display:block}
/* ---------- 原图弹窗（点主图弹出原始尺寸） ---------- */
.lb{position:fixed;inset:0;background:rgba(4,7,12,.94);z-index:9999;display:none;flex-direction:column}
.lb.on{display:flex}
.lb-close{position:absolute;top:12px;right:16px;z-index:2;font-size:24px;line-height:1;color:#fff;cursor:pointer;
  background:rgba(0,0,0,.45);border:1px solid rgba(255,255,255,.28);border-radius:10px;width:44px;height:44px}
.lb-stage{flex:1;display:flex;align-items:center;justify-content:center;overflow:auto;padding:18px}
.lb-stage img{max-width:96vw;max-height:calc(100vh - 128px);width:auto;height:auto;display:block;
  box-shadow:0 12px 44px rgba(0,0,0,.6)}
.lb.raw .lb-stage{display:block;text-align:center}
.lb.raw .lb-stage img{max-width:none;max-height:none;margin:0 auto}
.lb-bar{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap;
  padding:12px 16px;border-top:1px solid rgba(255,255,255,.12);background:rgba(0,0,0,.4)}
.lb-bar span{color:#9fb0c8;font-size:13px}
.lb-bar a,.lb-bar button{color:#fff;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  border-radius:8px;padding:7px 14px;cursor:pointer;text-decoration:none;font-size:13px}
.lb-bar a:hover,.lb-bar button:hover{background:rgba(255,255,255,.24)}
.buy-chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.sku{font-size:13px;color:var(--dim);margin:0 0 10px}
.pricebox{background:linear-gradient(180deg,#131a25,#0f141d);border:1px solid var(--line2);border-radius:var(--radius);
  padding:16px 18px;margin:18px 0;display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.pricebox p{flex:1 0 100%;margin:6px 0 0}
.facts{list-style:none;padding:0;margin:16px 0;display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.facts li{background:#0f141d;padding:11px 14px;display:flex;justify-content:space-between;gap:10px;font-size:14px}
.facts span{color:var(--dim)}
.facts b{font-family:var(--mono)}
.pblocks{margin-top:46px;display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.block{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.block.wide{grid-column:1/-1}
.block h2{font-size:16px;font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--dim);margin-bottom:14px}
.block p{color:#c3ccda}
.ticks{list-style:none;padding:0;margin:0}
.ticks li{position:relative;padding-left:24px;margin-bottom:9px;color:#c8d2e0;font-size:15px}
.ticks li:before{content:"▸";position:absolute;left:4px;color:var(--accent)}
.ticks.two-col{columns:2;column-gap:30px}
.plain{list-style:none;padding:0;margin:0}
.plain li{padding:7px 0;border-bottom:1px dashed var(--line);color:#c8d2e0;font-size:14.5px}
.plain li:last-child{border:0}
table.spec{width:100%;border-collapse:collapse;font-size:14.5px}
table.spec th{text-align:left;color:var(--dim);font-weight:500;padding:9px 12px 9px 0;width:42%;vertical-align:top;
  border-bottom:1px solid var(--line)}
table.spec td{padding:9px 0;font-family:var(--mono);color:#e4ebf5;border-bottom:1px solid var(--line)}
table.fit{width:100%;border-collapse:collapse;font-size:14px;overflow:hidden;border-radius:var(--radius-s)}
table.fit th{background:#131a25;color:var(--dim);font-weight:600;text-align:left;padding:10px 12px;font-size:12.5px;
  letter-spacing:.05em;text-transform:uppercase;white-space:nowrap}
table.fit td{padding:10px 12px;border-bottom:1px solid var(--line);font-family:var(--mono)}

/* ---------- 询盘表单 ---------- */
.quote{background:linear-gradient(180deg,#111722,#0e131b);border:1px solid var(--line2);border-radius:var(--radius);
  padding:26px;margin-top:46px;scroll-margin-top:130px}
.quote h2{font-size:20px}
.form .frow{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.form label{display:block;font-size:13.5px;color:var(--dim)}
.form input,.form textarea{margin-top:6px}
.form .hp{position:absolute;left:-9999px;width:1px;height:1px}
.form .kind{display:flex;align-items:center;gap:16px;margin-bottom:14px}
.radios{display:flex;gap:16px}
.radios label{display:flex;align-items:center;gap:7px;color:#d6dee9;font-size:14.5px}
.radios input{width:auto;margin:0}
.flash{padding:12px 16px;border-radius:var(--radius-s);margin:14px 0;font-size:14.5px;border:1px solid}
.flash.ok{background:#0f2318;border-color:#1d3d29;color:#7fe0a8}
.flash.error{background:#241315;border-color:#43201f;color:#ff9b90}

/* ---------- 关于 / 联系 ---------- */
.prose{max-width:74ch;color:#c3ccda;font-size:16.5px}
.prose p{margin-bottom:1.1em}
.facts-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:34px 0 10px}
.facts-grid div{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-align:center}
.facts-grid b{display:block;font-family:var(--mono);font-size:22px;color:#fff}
.facts-grid span{font-size:13px;color:var(--dim)}
.contact-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:26px;align-items:start}
.ccards{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.ccard{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.ccard:hover{border-color:var(--line2)}
.ccard h3{font-size:13px;font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--dim2);margin-bottom:4px}
.ccard p{margin:0;font-size:14.5px;color:#dbe3ee;word-break:break-word}
.cico{font-size:18px;color:var(--accent);display:block;margin-bottom:8px}
.contact-grid .quote{margin-top:0}
.article{max-width:74ch;margin:0 auto}
.article time{font-family:var(--mono);font-size:12.5px;color:var(--dim2)}
.article h1{margin:10px 0 14px}
.article p{color:#c6cfdd;font-size:16.5px}

/* ---------- 页脚 ---------- */
.foot{margin-top:70px;border-top:1px solid var(--line);background:#080a0f}
.foot-in{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px;padding:40px 22px 26px}
.foot h4{font-size:12.5px;font-family:var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--dim2);margin-bottom:12px}
.fcol a{display:block;color:#aab4c3;font-size:14.5px;padding:4px 0}
.fcol a:hover{color:var(--accent)}
.fbrand p{color:var(--dim);font-size:14px;max-width:34ch}
.foot-bot{display:flex;justify-content:space-between;gap:16px;padding:16px 22px 26px;border-top:1px solid var(--line);
  font-size:13px;color:var(--dim2);flex-wrap:wrap}
.foot-bot a:hover{color:var(--accent)}

/* ---------- 占位图 ---------- */
.ph{width:100%;height:auto;display:block}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .cats,.grid,.grid-3{grid-template-columns:repeat(2,1fr)}
  .band-in,.facts-grid{grid-template-columns:repeat(2,1fr)}
  .pdetail,.contact-grid,.shop{grid-template-columns:1fr}
  .side{position:static}
  .pblocks{grid-template-columns:1fr}
}
@media (max-width:680px){
  .gallery .shot{height:330px}
  .thumbs button{height:54px}
  .lb-stage{padding:10px}
  .lb-stage img{max-height:calc(100vh - 150px)}
  .nav-in{height:82px}
  .logo img{height:62px}
  .burger{display:block;margin-left:auto}
  .menu{display:none;position:absolute;left:0;right:0;top:82px;background:#0d1219;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:flex-start;gap:0;padding:10px 22px 18px}
  .menu a{padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  body.nav-open .menu{display:flex}
  .cats,.grid,.grid-3,.grid-2{grid-template-columns:1fr}
  .form .frow,.facts{grid-template-columns:1fr}
  .ticks.two-col{columns:1}
  .hero .wrap{padding-top:48px;padding-bottom:44px}
  .kpis{gap:22px}
  .foot-in{grid-template-columns:1fr;gap:20px}
  .ccards{grid-template-columns:1fr}
  .table-scroll,table.fit{display:block;overflow-x:auto;white-space:nowrap}
}

.slogan{font-family:var(--mono);font-size:11.5px;letter-spacing:.28em;color:var(--accent);opacity:.85;margin:2px 0 0}

/* ---------- 静态站上的前端筛选提示条 ---------- */
.filter-note{margin:0 0 14px;padding:10px 14px;border:1px solid var(--line2);border-radius:10px;
  background:linear-gradient(180deg,#131a25,#0f141d);color:var(--dim);font-size:13.5px}
.filter-note a{color:var(--accent2,#6fb3ff);margin-left:8px;text-decoration:none;border-bottom:1px dashed currentColor}
.filter-note a:hover{color:#fff}