:root{--ink:#0f2b30;--brand:#00474f;--brand2:#0a6b76;--accent:#12b886;--muted:#5b6b6e;--bg:#f5f8f7;--line:#e2e9e7;--card:#fff;--radius:14px;--max:1080px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px}
a{color:var(--brand2);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:var(--max);margin:0 auto;padding:0 20px}
header.site{position:sticky;top:0;z-index:50;background:var(--brand);color:#fff;box-shadow:0 2px 10px rgba(0,0,0,.12)}
.nav{display:flex;align-items:center;gap:18px;height:62px;max-width:var(--max);margin:0 auto;padding:0 20px;position:relative}
.logo{font-weight:800;font-size:20px;color:#fff;white-space:nowrap}.logo span{color:#8ce3c9}
.nav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0;flex-wrap:wrap}.nav a{color:#dff3ef;padding:8px 10px;border-radius:8px;font-size:15px}.nav a:hover{background:rgba(255,255,255,.12);text-decoration:none}
.nav .spacer{flex:1}.nav .cta{background:var(--accent);color:#04332c;font-weight:700;padding:8px 14px;border-radius:999px}.burger{display:none;background:none;border:0;color:#fff;font-size:22px}
.hero{background:linear-gradient(135deg,#00474f,#0a6b76 60%,#12907f);color:#fff;padding:48px 0}.hero h1{font-size:32px;margin:0 0 14px;line-height:1.3}.hero p{font-size:17px;max-width:740px;color:#e6fbf4;margin:0 0 22px}
.hero .btns{display:flex;gap:12px;flex-wrap:wrap}.btn{display:inline-block;background:var(--accent);color:#04332c;font-weight:700;padding:12px 22px;border-radius:10px;border:0;cursor:pointer}.btn.ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.6)}.btn:hover{text-decoration:none;filter:brightness(1.03)}
.trust{display:flex;gap:26px;flex-wrap:wrap;margin-top:22px;color:#d9f7ee;font-size:14px}.trust b{display:block;font-size:22px;color:#fff}
main{padding:0 0 40px}section{padding:30px 0}h2{font-size:25px;margin:0 0 14px;line-height:1.35}h3{font-size:19px;margin:22px 0 8px}.lead{font-size:17px;color:var(--muted);max-width:820px}
.grid{display:grid;gap:18px}.cols-2{grid-template-columns:repeat(2,1fr)}.cols-3{grid-template-columns:repeat(3,1fr)}.cards{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}.card h3{margin:0 0 6px}.price{font-size:24px;font-weight:800;color:var(--brand2)}.price small{font-size:13px;color:var(--muted);font-weight:400}
.tag{display:inline-block;background:#e6f7f1;color:#0a6b76;font-size:12px;padding:2px 8px;border-radius:999px;margin-left:6px}
.product{display:flex;flex-direction:column;gap:10px}.product .row{display:flex;align-items:baseline;gap:6px}.product a.buy{margin-top:auto;background:var(--brand);color:#fff;text-align:center;padding:10px;border-radius:9px;font-weight:700}.product a.buy:hover{text-decoration:none;background:var(--brand2)}
.prose{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px}.prose h2{margin-top:26px;padding-top:6px}.prose p{margin:12px 0}.prose ul{padding-left:22px}.prose li{margin:6px 0}.prose table{border-collapse:collapse;width:100%;margin:14px 0;font-size:15px}.prose th,.prose td{border:1px solid var(--line);padding:8px 10px;text-align:left}.prose th{background:#eef4f2}
.meta{color:var(--muted);font-size:14px;margin:0 0 8px}.crumb{font-size:13px;color:var(--muted);padding:14px 0 0}.crumb a{color:var(--muted)}
.faq{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:6px 22px;margin-top:10px}details{border-bottom:1px solid var(--line);padding:12px 0}details:last-child{border-bottom:0}
summary{cursor:pointer;font-weight:700;list-style:none}summary::-webkit-details-marker{display:none}summary:before{content:"＋";color:var(--brand2);margin-right:8px;font-weight:800}details[open] summary:before{content:"－"}details p{color:var(--muted);margin:8px 0 0}
.cta-band{background:linear-gradient(135deg,#0a6b76,#12b886);color:#fff;border-radius:var(--radius);padding:30px;display:flex;justify-content:space-between;gap:18px;align-items:center;flex-wrap:wrap;margin:30px 0}.cta-band h3{margin:0 0 6px;color:#fff;font-size:22px}.cta-band .btn{background:#fff;color:#0a6b76}
.links-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}.link-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}.link-card:hover{border-color:var(--brand2);text-decoration:none}.link-card b{display:block;color:var(--ink);margin-bottom:4px}.link-card span{color:var(--muted);font-size:14px}
footer.site{background:#063033;color:#bfe3dc;margin-top:30px;padding:40px 0 24px;font-size:14px}footer.site a{color:#d8f2ec}.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}.foot-grid h4{color:#fff;margin:0 0 10px;font-size:15px}.foot-grid ul{list-style:none;margin:0;padding:0}.foot-grid li{margin:6px 0}
.copy{border-top:1px solid rgba(255,255,255,.15);margin-top:24px;padding-top:16px;color:#9ccfc6;font-size:13px}
.note{background:#fff8e6;border:1px solid #ffe1a8;color:#8a5a00;border-radius:10px;padding:12px 16px;font-size:14px;margin:14px 0}
.toolbox{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}.toolbox textarea{width:100%;min-height:160px;border:1px solid var(--line);border-radius:10px;padding:12px;font-size:15px;font-family:inherit;resize:vertical}
.stat{display:inline-block;background:#eef4f2;border-radius:10px;padding:8px 14px;margin:6px 8px 0 0;font-size:15px}.stat b{color:var(--brand2)}
@media(max-width:820px){.nav ul{display:none}.nav ul.open{display:flex;flex-direction:column;position:absolute;top:62px;left:0;right:0;background:var(--brand);padding:12px 20px;gap:2px}.burger{display:block}.hero h1{font-size:26px}.cols-2,.cols-3,.foot-grid{grid-template-columns:1fr}.prose{padding:20px}}