/* koceanclean.com — hygiene-blue theme (protocol archetype) */
:root{
  --teal:#0E7C8C; --teal-dark:#0A5F6B; --teal-ink:#083F47;
  --light:#E8F4F6; --light-2:#F4FAFB;
  --amber:#F59E0B; --amber-soft:#FEF3E0;
  --ink:#1F2A33; --muted:#5A6B76; --line:#D7E5E9;
  --white:#FFFFFF; --radius:10px;
  --max:1120px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);line-height:1.7;font-size:16px;background:var(--white)}
img{max-width:100%;height:auto}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.3;color:var(--teal-ink);margin:1.6em 0 .6em}
h1{font-size:2rem;font-weight:700;margin-top:0}
h2{font-size:1.45rem;border-bottom:3px solid var(--light);padding-bottom:.35em}
h3{font-size:1.12rem}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
/* ---------- header ---------- */
.site-header{background:var(--white);border-bottom:3px solid var(--teal);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 20px;max-width:var(--max);margin:0 auto}
.brand{font-weight:800;font-size:1.35rem;color:var(--teal);letter-spacing:.5px}
.brand small{display:block;font-size:.68rem;font-weight:600;color:var(--muted);letter-spacing:2px}
.main-nav{display:flex;flex-wrap:wrap;gap:2px 14px;font-size:.92rem}
.main-nav a{color:var(--ink);font-weight:600;padding:6px 2px;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:var(--teal);text-decoration:none;border-bottom:2px solid var(--amber)}
.nav-toggle{display:none;background:var(--teal);color:#fff;border:0;border-radius:6px;padding:8px 12px;font-size:1rem;cursor:pointer}
/* ---------- hero ---------- */
.hero{background:linear-gradient(135deg,var(--teal-dark) 0%,var(--teal) 60%,#1295A8 100%);color:#fff;padding:56px 0}
.hero h1{color:#fff;font-size:2.3rem;margin:0 0 .5em}
.hero p.lead{font-size:1.12rem;max-width:640px;opacity:.95}
.hero-ctas{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-block;padding:12px 26px;border-radius:8px;font-weight:700;font-size:1rem;border:2px solid transparent;cursor:pointer}
.btn-amber{background:var(--amber);color:#3A2A05}
.btn-outline{border-color:#fff;color:#fff;background:transparent}
.btn-teal{background:var(--teal);color:#fff}
.btn:hover{text-decoration:none;filter:brightness(1.05)}
/* ---------- breadcrumb ---------- */
.crumbs{font-size:.85rem;color:var(--muted);padding:14px 0 0}
.crumbs a{color:var(--teal)}
/* ---------- sections ---------- */
.section{padding:40px 0}
.section.alt{background:var(--light-2)}
.page-head{padding:30px 0 6px}
/* ---------- stat band ---------- */
.stat-band{background:var(--teal-dark);color:#fff;padding:34px 0;margin:36px 0}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;text-align:center}
.stat-grid>*{min-width:0}
.stat-num{font-size:1.9rem;font-weight:800;color:var(--amber)}
.stat-label{font-size:.9rem;opacity:.9}
/* ---------- protocol steps ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:24px 0}
.protocol-step{background:#fff;border:1px solid var(--line);border-top:5px solid var(--teal);border-radius:var(--radius);padding:20px}
.protocol-step .step-n{display:inline-block;background:var(--teal);color:#fff;font-weight:800;border-radius:50%;width:34px;height:34px;line-height:34px;text-align:center;margin-bottom:10px}
.protocol-step h3{margin:.2em 0 .4em;color:var(--teal-ink)}
.protocol-step p{margin:0;font-size:.95rem;color:var(--muted)}
/* ---------- color zones ---------- */
.color-zone{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:0;margin:24px 0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.zone{padding:20px;color:#fff}
.zone h3{color:#fff;margin:.2em 0 .4em}
.zone p{margin:0;font-size:.92rem;opacity:.95}
.zone.red{background:#C0392B}.zone.yellow{background:#D9A400}.zone.green{background:#1E8E4D}.zone.blue{background:#2471A3}
.zone .tag{display:inline-block;background:rgba(255,255,255,.25);border-radius:20px;padding:2px 12px;font-size:.78rem;font-weight:700;margin-bottom:8px}
/* ---------- product cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;margin:24px 0}
.product-card .pc-ph{width:100%;height:190px;background:repeating-linear-gradient(45deg,var(--light),var(--light) 12px,#dceef1 12px,#dceef1 24px)}
.product-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.product-card img{width:100%;height:190px;object-fit:cover;background:var(--light)}
.product-card .pc-body{padding:16px 18px;flex:1}
.product-card h3{margin:.1em 0 .4em;font-size:1.02rem}
.product-card p{font-size:.9rem;color:var(--muted);margin:.3em 0}
.product-card .pc-specs{font-size:.82rem;color:var(--teal-dark);font-weight:600}
.product-card .pc-cta{padding:0 18px 18px}
/* ---------- spec table ---------- */
.spec-table{width:100%;border-collapse:collapse;margin:22px 0;font-size:.94rem}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top}
.spec-table th{background:var(--teal);color:#fff;width:32%}
.spec-table tr:nth-child(even) td{background:var(--light-2)}
/* ---------- info box / CTA ---------- */
.info-box{background:var(--amber-soft);border-left:5px solid var(--amber);border-radius:6px;padding:18px 20px;margin:26px 0}
.info-box strong{color:#7A4E00}
.cta-band{background:var(--light);border-radius:var(--radius);padding:34px;text-align:center;margin:36px 0}
.cta-band h2{border:0;margin-top:0}
.oem-strip{background:linear-gradient(90deg,var(--teal) ,var(--teal-dark));color:#fff;border-radius:var(--radius);padding:26px 30px;margin:30px 0;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px}
.oem-strip h3{color:#fff;margin:0}
/* ---------- FAQ ---------- */
details.faq,body details{border:1px solid var(--line);border-radius:8px;margin:10px 0;background:#fff}
details.faq summary,body details summary{cursor:pointer;padding:14px 18px;font-weight:700;color:var(--teal-ink);list-style:none}
details.faq summary::-webkit-details-marker,body details summary::-webkit-details-marker{display:none}
details.faq summary::before,body details summary::before{content:"+ ";color:var(--amber);font-weight:800}
details.faq[open] summary::before,body details[open] summary::before{content:"– "}
details.faq .faq-a,body details p{padding:0 18px 16px;color:var(--muted)}
/* ---------- forms ---------- */
.quote-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;max-width:720px;margin:24px auto}
.quote-form label{display:block;font-weight:600;margin:14px 0 6px}
.quote-form input,.quote-form select,.quote-form textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:6px;font-size:1rem;font-family:var(--font)}
.quote-form textarea{min-height:130px}
.quote-form button{margin-top:18px}
/* ---------- blog ---------- */
.post-list{display:grid;gap:18px;margin:24px 0}
.post-item{border:1px solid var(--line);border-radius:var(--radius);padding:22px;background:#fff}
.post-item h2{border:0;margin:.1em 0 .3em;padding:0}
.post-meta{font-size:.85rem;color:var(--muted)}
/* ---------- footer ---------- */
.site-footer{background:var(--teal-ink);color:#DDE9EC;margin-top:50px;padding:44px 0 90px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:26px}
.site-footer h4{color:#fff;margin:.2em 0 .7em}
.site-footer a{color:#BFE3E9}
.site-footer p,.site-footer li{font-size:.9rem}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:6px 0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.2);margin-top:26px;padding-top:16px;font-size:.82rem;color:#9DBCC3}
/* ---------- sticky mobile CTA ---------- */
.sticky-cta{display:none;position:fixed;left:0;right:0;bottom:0;background:var(--teal-dark);padding:10px 14px;z-index:60}
.sticky-cta a{display:block;text-align:center;background:var(--amber);color:#3A2A05;font-weight:800;border-radius:8px;padding:12px}
/* ---------- misc ---------- */
.kv{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:20px 0}
.kv .k{background:var(--light);border-radius:8px;padding:16px 18px}
.kv .k strong{color:var(--teal-dark)}
.check-list{list-style:none;padding:0}
.check-list li{padding:8px 0 8px 30px;position:relative}
.check-list li::before{content:"✓";position:absolute;left:4px;color:var(--teal);font-weight:800}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.authority-note{background:var(--light);border-radius:8px;padding:16px 20px;font-size:.9rem;color:var(--muted);margin:26px 0}
@media(max-width:860px){
  .two-col{grid-template-columns:1fr}
  .main-nav{display:none;flex-direction:column;background:#fff;position:absolute;top:100%;left:0;right:0;border-bottom:3px solid var(--teal);padding:10px 20px}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .hero h1{font-size:1.7rem}
  h1{font-size:1.6rem}
  .sticky-cta{display:block}
  .site-footer{padding-bottom:150px}
}

/* ---------- 视觉签名：协议大数字排印 (Protocol-Numeral Editorial) ---------- */
:root{
  --zone-red:#D64545; --zone-yellow:#E8A317; --zone-green:#2E9E5B; --zone-blue:#2B7FD4;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
/* 卫生分区色带：编辑式标尺分割线 */
.zone-band{display:flex;height:10px;border-radius:5px;overflow:hidden;margin:30px 0}
.zone-band span{flex:1}
.zone-band .zr{background:var(--zone-red)} .zone-band .zy{background:var(--zone-yellow)}
.zone-band .zg{background:var(--zone-green)} .zone-band .zb{background:var(--zone-blue)}
/* hero 证据行：mono 排印规格条 */
.evidence-line{font-family:var(--mono);font-size:.82rem;letter-spacing:.4px;color:#EAF6F8;
  border-top:1px solid rgba(255,255,255,.35);border-bottom:1px solid rgba(255,255,255,.35);
  padding:10px 0;margin:22px 0 0;display:flex;flex-wrap:wrap;gap:6px 22px}
.evidence-line b{color:#fff;font-weight:700}
/* 协议步骤：大数字排印 */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:22px;margin:24px 0}
.protocol-step{border-top:6px solid var(--teal);padding-top:10px}
.protocol-step .step-n{font-family:var(--mono);font-size:3.2rem;font-weight:800;color:var(--teal);
  line-height:1;display:block;letter-spacing:-2px;background:none;border-radius:0;width:auto;height:auto;
  min-width:0;text-align:left;margin-bottom:6px}
.protocol-step h3{margin:.5em 0 .3em;font-size:1.05rem}
.protocol-step p{margin:0;color:var(--muted);font-size:.93rem}
.protocol-step.zr{border-color:var(--zone-red)} .protocol-step.zy{border-color:var(--zone-yellow)}
.protocol-step.zg{border-color:var(--zone-green)} .protocol-step.zb{border-color:var(--zone-blue)}
/* 章节 kicker：编辑式小标题 */
.kicker{font-family:var(--mono);font-size:.75rem;letter-spacing:2.5px;text-transform:uppercase;
  color:var(--teal);font-weight:700;margin:0 0 6px}
/* 纤维对比可视化：克重标尺 */
.gsm-scale{display:flex;align-items:flex-end;gap:4px;height:90px;margin:18px 0}
.gsm-scale .bar{flex:1;background:linear-gradient(180deg,var(--teal),var(--teal-dark));border-radius:3px 3px 0 0;min-width:26px;position:relative}
.gsm-scale .bar span{position:absolute;bottom:-24px;left:50%;transform:translateX(-50%);
  font-family:var(--mono);font-size:.68rem;color:var(--muted);white-space:nowrap}
.guide-cta-top{margin:14px 0 4px}
.zone-matrix{width:100%;border-collapse:collapse;margin:20px 0;font-size:.93rem}
.zone-matrix th,.zone-matrix td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.zone-matrix th{background:var(--light);color:var(--teal-ink)}
.zone-dot{display:inline-block;width:12px;height:12px;border-radius:50%;margin-right:8px;vertical-align:baseline}