/* ZEUSYANG — tokens 与 DESIGN.md 对应，改样式只改本文件 */
:root{
  --ink:#12181F; --ink-soft:#4A5765; --paper:#FFFFFF; --paper-alt:#F4F6F8;
  --brand:#C8331B; --brand-dark:#9E2612; --steel:#2C3A47; --steel-soft:#E7ECF0;
  --accent:#E8A33D; --line:#DDE3E8; --success:#1F7A4C;
  --font-display:"Barlow Condensed",Arial Narrow,sans-serif;
  --font-body:"Inter",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",Consolas,monospace;
  --container:1200px; --gap:24px; --section:clamp(56px,8vw,96px);
  --radius:4px; --shadow:0 1px 2px rgba(18,24,31,.06),0 8px 24px rgba(18,24,31,.07);
  --shadow-hover:0 2px 4px rgba(18,24,31,.08),0 14px 34px rgba(18,24,31,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font:400 1.0625rem/1.65 var(--font-body);color:var(--ink);background:var(--paper)}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dark)}
h1,h2,.h2{font-family:var(--font-display);font-weight:700;line-height:1.1;color:var(--ink)}
h1{font-size:clamp(2rem,4.5vw,3.1rem)}
h2{font-size:clamp(1.55rem,3vw,2.15rem)}
h3{font-size:1.25rem;line-height:1.3;font-weight:600}
p{margin:0 0 1em}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.prose{max-width:780px;margin:0 auto}
.prose h2{margin:1.6em 0 .6em}
.prose h3{margin:1.4em 0 .5em}
.prose ul,.prose ol{margin:0 0 1em 1.3em}
.prose li{margin:.35em 0}
section{padding:var(--section) 0}
.muted{color:var(--ink-soft)}
.small{font-size:.875rem;line-height:1.55}
.kicker{font:600 .8rem/1 var(--font-body);letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:12px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:1px solid var(--line)}
.header-top{background:var(--steel);color:#fff;font-size:.85rem}
.header-top .container{display:flex;justify-content:space-between;align-items:center;padding-top:7px;padding-bottom:7px;gap:16px;flex-wrap:wrap}
.header-top a{color:#fff}
.header-top a:hover{color:var(--accent)}
.header-main .container{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:14px;padding-bottom:14px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700;font-size:1.6rem;color:var(--ink);letter-spacing:.02em}
.logo .z{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;background:var(--brand);color:#fff;border-radius:var(--radius);font-size:1.35rem}
.logo small{display:block;font:500 .62rem/1.2 var(--font-body);letter-spacing:.08em;color:var(--ink-soft);text-transform:uppercase}
.nav{display:flex;gap:26px;align-items:center}
.nav a{color:var(--ink);font-weight:600;font-size:.95rem;padding:6px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current]{color:var(--brand);border-color:var(--brand)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:var(--radius);padding:8px 12px;font-size:1.1rem;cursor:pointer;color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:var(--radius);font-weight:600;font-size:.95rem;line-height:1.2;transition:all .18s ease-out;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);color:#fff}
.btn-outline{border-color:var(--brand);color:var(--brand)}
.btn-outline:hover{background:var(--brand);color:#fff}
.btn-wa{background:var(--success);color:#fff}
.btn-wa:hover{background:#16603c;color:#fff}
.btn-sm{padding:9px 16px;font-size:.875rem}
.btn-lg{padding:15px 30px;font-size:1.05rem}

/* hero */
.hero{background:var(--steel);color:#fff;padding:0;position:relative;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:clamp(48px,7vw,84px) 0}
.hero h1{color:#fff}
.hero p.lead{color:#C9D4DD;font-size:1.125rem;margin:18px 0 28px;max-width:560px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-img{position:relative}
.hero-img img{border-radius:var(--radius);box-shadow:var(--shadow-hover);aspect-ratio:4/3;object-fit:cover;width:100%}
.hero-split{background:linear-gradient(90deg,var(--steel) 55%,#22303c 55%)}

/* trust bar */
.trustbar{background:#22303c;border-top:1px solid rgba(255,255,255,.08)}
.trustbar .container{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);padding-top:22px;padding-bottom:22px}
.trust-item{color:#fff;text-align:center}
.trust-item b{display:block;font-family:var(--font-display);font-size:1.9rem;color:var(--accent)}
.trust-item span{font-size:.85rem;color:#AEBCC7}

/* cards */
.grid{display:grid;gap:var(--gap)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .18s ease-out,box-shadow .18s ease-out;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.card img{aspect-ratio:4/3;object-fit:cover;width:100%}
.card .card-body{padding:18px 20px 22px;flex:1;display:flex;flex-direction:column}
.card h3{margin-bottom:8px}
.card h3 a{color:var(--ink)}
.card h3 a:hover{color:var(--brand)}
.card p{font-size:.92rem;color:var(--ink-soft);flex:1}
.tag{display:inline-block;font:600 .72rem/1 var(--font-body);letter-spacing:.06em;text-transform:uppercase;padding:5px 9px;border-radius:2px;background:var(--steel-soft);color:var(--steel);margin-bottom:10px}
.tag.hot{background:#FBEAE6;color:var(--brand)}

/* section head */
.sec-head{max-width:720px;margin:0 auto 44px;text-align:center}
.sec-head p.muted{margin-top:10px}

/* alt bg */
.alt{background:var(--paper-alt)}

/* split feature */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow)}
.split ul.checks{list-style:none;margin:18px 0 24px}
.split ul.checks li{padding:7px 0 7px 30px;position:relative;color:var(--ink-soft)}
.split ul.checks li::before{content:"✓";position:absolute;left:0;top:6px;width:20px;height:20px;border-radius:50%;background:var(--brand);color:#fff;font-size:.75rem;display:flex;align-items:center;justify-content:center}

/* spec table */
table.specs{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:.95rem}
table.specs th,table.specs td{padding:11px 14px;border:1px solid var(--line);text-align:left}
table.specs th{background:var(--steel);color:#fff;font-family:var(--font-display);letter-spacing:.03em;font-size:1rem}
table.specs tr:nth-child(even) td{background:var(--steel-soft)}
table.specs td.num{font-family:var(--font-mono);font-size:.9rem}

/* CTA band */
.cta-band{background:var(--steel);color:#fff;text-align:center}
.cta-band h2{color:#fff}
.cta-band p{color:#B8C5CF;margin:12px auto 26px;max-width:640px}
.cta-band .hero-cta{justify-content:center}

/* breadcrumb */
.crumbs{font-size:.85rem;color:var(--ink-soft);padding:16px 0}
.crumbs a{color:var(--ink-soft)}
.crumbs a:hover{color:var(--brand)}
.crumbs span{margin:0 6px;color:var(--line)}

/* page hero (inner pages) */
.page-hero{background:var(--steel);color:#fff;padding:clamp(40px,6vw,64px) 0}
.page-hero h1{color:#fff}
.page-hero p{color:#B8C5CF;margin-top:10px;max-width:760px}
.page-hero .crumbs{padding:0 0 14px}
.page-hero .crumbs,.page-hero .crumbs a{color:#8FA1AF}

/* product layout */
.product-top{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:start;padding:48px 0 8px}
.gallery img.main{border-radius:var(--radius);border:1px solid var(--line);aspect-ratio:4/3;object-fit:cover;width:100%}
.gallery .thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:10px}
.gallery .thumbs img{aspect-ratio:1/1;object-fit:cover;border-radius:3px;border:1px solid var(--line);cursor:pointer;transition:opacity .18s}
.gallery .thumbs img:hover{opacity:.8}
.buybox{border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);position:sticky;top:110px}
.buybox .row{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px dashed var(--line);font-size:.93rem}
.buybox .row b{font-family:var(--font-mono);font-size:.9rem}
.buybox .btns{display:grid;gap:10px;margin-top:18px}
.badge-stock{color:var(--success);font-weight:600;font-size:.85rem}

/* faq */
.faq details{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px;background:var(--paper)}
.faq summary{padding:15px 20px;font-weight:600;cursor:pointer;list-style:none;position:relative;padding-right:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:12px;font-size:1.3rem;color:var(--brand)}
.faq details[open] summary::after{content:"–"}
.faq .a{padding:0 20px 16px;color:var(--ink-soft);font-size:.97rem}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.step{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px}
.step .n{font-family:var(--font-display);font-size:2.4rem;color:var(--brand);line-height:1;margin-bottom:12px}

/* contact form */
.form-wrap{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:start}
.info-block{display:flex;gap:14px;margin-bottom:22px;align-items:flex-start}
.info-block .ic{width:42px;height:42px;flex:none;border-radius:var(--radius);background:var(--steel-soft);display:flex;align-items:center;justify-content:center;font-size:1.1rem}
form.inquiry{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
form.inquiry label{display:block;font-weight:600;font-size:.88rem;margin-bottom:6px}
form.inquiry input,form.inquiry textarea,form.inquiry select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:3px;font:400 .95rem var(--font-body);margin-bottom:16px;background:var(--paper);color:var(--ink)}
form.inquiry input:focus,form.inquiry textarea:focus{outline:2px solid var(--brand);border-color:transparent}
.form-msg{display:none;padding:12px 16px;border-radius:3px;margin-bottom:16px;font-size:.92rem}
.form-msg.ok{display:block;background:#E6F4EC;color:var(--success)}
.form-msg.err{display:block;background:#FBEAE6;color:var(--brand)}

/* footer */
.site-footer{background:#1B2530;color:#9DAEBB;font-size:.92rem}
.site-footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px;padding:60px 0 44px}
.site-footer h4{color:#fff;font-family:var(--font-display);font-size:1.1rem;letter-spacing:.04em;margin-bottom:16px}
.site-footer a{color:#9DAEBB;display:block;padding:4px 0}
.site-footer a:hover{color:#fff}
.site-footer .fbottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;font-size:.82rem;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* mobile sticky cta */
.mcta{display:none}

/* responsive */
@media (max-width:960px){
  .hero-inner,.split,.form-wrap,.product-top{grid-template-columns:1fr}
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .site-footer .cols{grid-template-columns:1fr 1fr}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:10px 20px 16px}
  .nav.open{display:flex}
  .nav a{width:100%;padding:12px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .buybox{position:static}
}
@media (max-width:640px){
  .g2,.g3,.g4{grid-template-columns:1fr}
  .trustbar .container{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .header-top{display:none}
  .mcta{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:60;background:var(--steel)}
  .mcta a{flex:1;text-align:center;padding:13px 6px;color:#fff;font-weight:600;font-size:.9rem}
  .mcta a.q{background:var(--brand)}
  .mcta a.w{background:var(--success)}
  body{padding-bottom:46px}
  .gallery .thumbs{grid-template-columns:repeat(4,1fr)}
}