/* 速博特新官网 —— 纯静态、无外部字体（国内访问快），亮色单主题 */
:root{
  --red:#D41A21; --red-d:#B8141B; --ink:#16191D; --ink2:#2E343B; --muted:#5B626B; --line:#E2E5E9;
  --bg:#FFFFFF; --bg2:#F4F5F7; --dark:#15181C; --dark2:#1F242A; --on-dark:#C3C8CF; --on-dark-m:#9AA1AB; --gold:#E9B949;
  --r:12px; --wrap:1200px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Noto Sans CJK SC",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 var(--font);text-rendering:optimizeLegibility}
body.lang-zh{line-height:1.8}
/* 英文页先用拉丁字体，否则 ’ × 等符号会落到中文字体上变成全角 */
body.lang-en{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Liberation Sans","Noto Sans","PingFang SC","Microsoft YaHei",sans-serif}
img{max-width:100%;height:auto;display:block}
a{color:var(--red);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.25;margin:0 0 .5em;letter-spacing:-.01em;color:var(--ink)}
h1{font-size:clamp(30px,4.4vw,50px);font-weight:800}
h2{font-size:clamp(23px,2.6vw,32px);font-weight:800}
h3{font-size:18px;font-weight:700}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.narrow{max-width:860px}
.small{font-size:14px;color:var(--muted)}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 12px;z-index:99}
.skip:focus{left:8px}
:focus-visible{outline:3px solid rgba(212,26,33,.45);outline-offset:2px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:999px;font-weight:700;font-size:16px;border:2px solid transparent;cursor:pointer;white-space:nowrap;transition:transform .15s,background .15s,box-shadow .15s;font-family:inherit}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-red{background:var(--red);color:#fff;box-shadow:0 6px 18px -8px rgba(212,26,33,.7)}
.btn-red:hover{background:var(--red-d)}
.btn-ghost-w{border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost-w:hover{background:rgba(255,255,255,.1)}
.btn-white{background:#fff;color:var(--red-d)}

/* 顶部条 + 页头 */
.strip{background:var(--dark);color:var(--on-dark);font-size:13px}
.strip .wrap{display:flex;justify-content:space-between;align-items:center;height:36px;gap:16px}
.strip a{color:var(--on-dark)}
.strip-r{display:flex;gap:20px}
.hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.hdr-in{display:flex;align-items:center;gap:28px;height:72px}
.logo img{width:180px;height:40px}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{color:var(--ink2);font-weight:600;font-size:15.5px;padding:24px 0;border-bottom:3px solid transparent}
.nav a:hover{color:var(--red);text-decoration:none}
.nav a.on{color:var(--ink);border-bottom-color:var(--red)}
.lang{font-weight:700;font-size:14px;color:var(--ink2);border:1px solid var(--line);border-radius:999px;padding:5px 12px}
.lang:hover{border-color:var(--red);color:var(--red);text-decoration:none}
.hdr-cta{height:42px;padding:0 20px;font-size:15px}
.mnav{display:none}

/* 首屏 */
.hero{background:radial-gradient(1000px 520px at 82% 30%,#2A3038 0%,var(--dark) 62%);color:var(--on-dark);overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding-top:76px;padding-bottom:80px}
.hero h1{color:#fff;margin-bottom:.45em}
.eyebrow{font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--red);margin:0 0 12px}
.hero .eyebrow,.sec-dark .eyebrow{color:var(--gold)}
.lead{font-size:18px;color:var(--muted);max-width:640px}
.hero .lead{color:var(--on-dark)}
.hero-b{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0 36px}
.facts{list-style:none;margin:0;padding:24px 0 0;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;border-top:1px solid rgba(255,255,255,.12)}
.facts b{display:block;font-size:24px;color:#fff;font-weight:800;line-height:1.2}
.facts span{font-size:13.5px;color:var(--on-dark-m);line-height:1.4;display:block;margin-top:4px}
.hero-v{display:grid;grid-template-columns:1.25fr 1fr;grid-template-rows:1fr 1fr;gap:14px;aspect-ratio:1.18}
.hero-v img{width:100%;height:100%;object-fit:cover;border-radius:var(--r);border:1px solid rgba(255,255,255,.08);box-shadow:0 24px 50px -24px rgba(0,0,0,.7)}
.hero-v .h1i{grid-row:1 / span 2}

/* 区块 */
.sec{padding:80px 0}
.sec-g{background:var(--bg2)}
.sec-dark{background:var(--dark);color:var(--on-dark)}
.sec-dark h2{color:#fff}
.sec-h{max-width:760px;margin-bottom:36px}
.sec-h p{color:var(--muted);font-size:17px}
.sec-h .eyebrow{color:var(--red);font-size:13px}
.sec-more{margin-top:24px;font-weight:700}
.two{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.two-wide{grid-template-columns:1.25fr 1fr}

/* 可定制参数 */
.params{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.params li{border:1px solid var(--line);border-radius:var(--r);padding:20px 20px 18px;background:#fff;position:relative}
.params li::before{content:"";position:absolute;left:20px;top:0;width:28px;height:3px;background:var(--red);border-radius:0 0 3px 3px}
.params b{display:block;font-size:16.5px;margin-bottom:6px}
.params span{font-size:14.5px;color:var(--muted);line-height:1.6;display:block}

/* 产品卡 */
.cards{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.cards-lg{grid-template-columns:repeat(3,1fr)}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;color:inherit;transition:transform .18s,box-shadow .18s,border-color .18s}
.card:hover{text-decoration:none;transform:translateY(-3px);box-shadow:0 18px 36px -22px rgba(22,25,29,.45);border-color:#d3d7dc}
.card img{aspect-ratio:3/2;object-fit:cover;width:100%;background:#eceef1}
.card-b{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.card-b h2,.card-b h3{font-size:17.5px;margin-bottom:6px}
.card-b p{font-size:14.5px;color:var(--muted);line-height:1.6;margin-bottom:10px}
.card-b .small{font-size:13px}
.more{margin-top:auto;color:var(--red);font-weight:700;font-size:14.5px}

/* 流程 */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:18px;counter-reset:s}
.steps li{position:relative;padding:22px 20px;border-radius:var(--r);background:#fff;border:1px solid var(--line)}
.sec-g .steps li{background:#fff}
.steps .n{display:inline-flex;width:36px;height:36px;border-radius:50%;background:var(--red);color:#fff;font-weight:800;align-items:center;justify-content:center;margin-bottom:12px}
.steps h3{font-size:17px}
.steps p{font-size:14.5px;color:var(--muted);margin:0;line-height:1.6}

/* 数字 + 行业 */
.stats{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stats-4{grid-template-columns:repeat(4,1fr)}
.stats li{background:var(--dark2);border:1px solid rgba(255,255,255,.07);border-radius:var(--r);padding:26px 24px}
.stats b{display:block;font-size:36px;color:var(--gold);font-weight:800;line-height:1.1}
.stats span{color:var(--on-dark-m);font-size:14.5px}
.tags{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.tags li{border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:4px 14px;font-size:14px;color:var(--on-dark)}
.tags-l li{border-color:var(--line);color:var(--ink2);background:#fff}

/* 资料表 */
.kv{display:grid;grid-template-columns:96px 1fr;gap:10px 18px;margin:0;font-size:15px}
.lang-en .kv{grid-template-columns:130px 1fr}
.kv dt{color:var(--muted);font-weight:600}
.kv dd{margin:0}
.kv-1{grid-template-columns:1fr;gap:2px}
.kv-1 dd{margin-bottom:10px}

/* 问答 */
.faq details{border-bottom:1px solid var(--line);padding:4px 0}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px 0}
.faq summary::-webkit-details-marker{display:none}
.faq summary h3{margin:0;font-size:17px}
.faq summary::after{content:"+";font-size:24px;font-weight:400;color:var(--red);line-height:1;flex:none}
.faq details[open] summary::after{content:"−"}
.faq details p{color:var(--ink2);margin:0 0 16px;padding-right:32px}
.faq-sub{margin-top:56px}
.faq-g{font-size:19px;margin-top:32px}
.faq-g a{color:var(--ink)}

/* 内页头 */
.phead{background:linear-gradient(180deg,var(--bg2),#fff);padding:28px 0 52px;border-bottom:1px solid var(--line)}
.crumbs{font-size:13.5px;color:var(--muted);margin-bottom:28px}
.crumbs a{color:var(--muted)}
.crumbs span{margin:0 4px}
.fam-h{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.fam-h .lead{margin-bottom:24px}
.fam-cover{border-radius:var(--r);border:1px solid var(--line);box-shadow:0 22px 44px -26px rgba(22,25,29,.5);width:100%}
.prose p{font-size:16.5px;color:var(--ink2)}
.box{background:var(--bg2);border:1px solid var(--line);border-radius:var(--r);padding:28px}
.sec-g .box{background:#fff}
.box h2{font-size:21px}
.checks{list-style:none;margin:0 0 18px;padding:0}
.checks li{position:relative;padding:6px 0 6px 30px;font-size:15.5px;color:var(--ink2)}
.checks li::before{content:"";position:absolute;left:2px;top:13px;width:16px;height:9px;border-left:3px solid var(--red);border-bottom:3px solid var(--red);transform:rotate(-45deg)}
.note{font-size:14.5px;color:var(--muted);background:#fff;border-left:3px solid var(--red);padding:10px 14px;border-radius:0 8px 8px 0}
.links{list-style:none;padding:0;margin:0;columns:2;column-gap:24px}
.links li{padding:6px 0;break-inside:avoid}
.links a{color:var(--ink2);font-weight:600}
.links a:hover{color:var(--red)}

/* 案例图库 */
.prod{margin-bottom:36px}
.prod h3{font-size:18px;margin-bottom:12px}
.gal{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.gal a{display:block;border-radius:10px;overflow:hidden;border:1px solid var(--line);background:#fff}
.gal img{aspect-ratio:3/2;object-fit:cover;width:100%;transition:transform .25s}
.gal a:hover img{transform:scale(1.04)}

/* 规格表 */
.spec{width:100%;border-collapse:collapse;font-size:15px}
.spec th,.spec td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.spec th{width:30%;color:var(--ink);font-weight:700;background:var(--bg2)}
.spec td{color:var(--ink2)}

/* 联系 */
.ccards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ccard{border:1px solid var(--line);border-radius:var(--r);padding:24px}
.ccard h2{font-size:15px;color:var(--muted);font-weight:700;letter-spacing:.02em}
.ccard .big{font-size:22px;font-weight:800;margin-bottom:6px;word-break:break-all}
.ccard p{margin-bottom:6px}
.rfq{display:grid;gap:16px}
.rfq .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.rfq label{display:flex;flex-direction:column;gap:6px;font-size:14.5px;font-weight:600;color:var(--ink2)}
.rfq input,.rfq select,.rfq textarea{font:inherit;font-weight:400;font-size:16px;color:var(--ink);background:#fff;border:1px solid #C9CED5;border-radius:10px;padding:11px 13px;width:100%}
.rfq input[type=file]{padding:9px;background:#fff}
.rfq input:focus,.rfq select:focus,.rfq textarea:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(212,26,33,.15)}
.rfq .btn{justify-self:start}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.done{text-align:center;padding-top:40px}
.done .lead{margin:0 auto 28px}

/* 询价横幅 */
.ctaband{background:var(--red-d);color:#fff}
.ctaband-in{display:flex;align-items:center;justify-content:space-between;gap:32px;padding-top:52px;padding-bottom:52px}
.ctaband h2{color:#fff;font-size:clamp(21px,2.3vw,28px);margin-bottom:8px}
.ctaband p{margin:0;color:#fff;opacity:.95}
.ctaband a:not(.btn){color:#fff;text-decoration:underline}
.ctaband-b{display:flex;gap:12px;flex:none}

/* 页脚 */
.ftr{background:var(--dark);color:var(--on-dark-m);font-size:14.5px;padding-top:56px}
.ftr a{color:var(--on-dark)}
.ftr-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:48px}
.ftr-brand{font-size:20px;font-weight:800;color:#fff;margin-bottom:10px}
.ftr-h{font-weight:700;color:#fff;margin:0 0 10px;font-size:15px}
.ftr ul{list-style:none;padding:0;margin:0 0 20px}
.ftr li{padding:3px 0}
.ftr-c{line-height:2}
.ftr-b{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:18px;padding-bottom:22px;font-size:13px}

/* 响应式 */
@media (max-width:1080px){
  .nav{gap:18px}
  .nav a{font-size:15px}
  .steps{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:960px){
  .nav,.hdr-cta,.lang{display:none}
  .mnav{display:block;margin-left:auto;position:relative}
  .mnav summary{list-style:none;cursor:pointer;font-weight:700;border:1px solid var(--line);border-radius:999px;padding:7px 16px;font-size:15px}
  .mnav summary::-webkit-details-marker{display:none}
  .mnav nav{position:absolute;right:0;top:48px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 18px 40px -18px rgba(0,0,0,.35);display:flex;flex-direction:column;min-width:200px;padding:8px}
  .mnav nav a{padding:10px 14px;color:var(--ink);font-weight:600;border-radius:8px}
  .mnav nav a.on{color:var(--red)}
  .hero-in,.two,.two-wide,.fam-h{grid-template-columns:1fr;gap:36px}
  .hero-in{padding-top:48px;padding-bottom:56px}
  .hero-v{aspect-ratio:1.5}
  .ftr-grid{grid-template-columns:1fr 1fr}
  .ctaband-in{flex-direction:column;align-items:flex-start}
  .ccards{grid-template-columns:1fr}
  .params,.cards,.cards-lg{grid-template-columns:repeat(2,1fr)}
  .stats-4{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .wrap{padding-left:16px;padding-right:16px}
  .strip{display:none}
  .hdr-in{height:62px}
  .logo img{width:144px;height:32px}
  .sec{padding:56px 0}
  .facts{grid-template-columns:1fr 1fr}
  .steps,.cards-lg{grid-template-columns:1fr}
  .params,.cards{grid-template-columns:1fr 1fr;gap:12px}
  .params li{padding:16px 14px 14px}
  .params li::before{left:14px}
  .params b{font-size:15.5px}
  .params span{font-size:13.5px}
  .cards .card-b{padding:12px 12px 14px}
  .cards .card-b h3{font-size:15px}
  .cards .card-b p{display:none}
  .cards .more{font-size:13.5px}
  .gal{grid-template-columns:1fr 1fr}
  .rfq .row{grid-template-columns:1fr}
  .ftr-grid{grid-template-columns:1fr;gap:28px}
  .links{columns:1}
  .kv,.lang-en .kv{grid-template-columns:1fr;gap:0}
  .kv dd{margin-bottom:10px}
  .spec th{width:36%}
  .ctaband-b{flex-wrap:wrap}
  .btn{height:46px;padding:0 20px}
  .hero-v{grid-template-columns:1fr 1fr;grid-template-rows:auto auto;aspect-ratio:auto}
  .hero-v .h1i{grid-column:1 / span 2;grid-row:auto}
}