:root{--navy:#102433;--blue:#175e87;--teal:#168f7b;--red:#cf3e2d;--ink:#122434;--muted:#627386;--line:#dbe4eb;--field:#f3f7f9}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#f5f8fa;font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.65}a{text-decoration:none;color:inherit}img{max-width:100%}
.buyer-header{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;padding:0 clamp(18px,5vw,72px);color:#fff;background:#0d1d2a}.buyer-brand strong{display:block;font-size:16px}.buyer-brand small{color:#aebdca}.buyer-nav{display:flex;flex-wrap:wrap;align-items:center;gap:18px;font-size:13px;font-weight:800}.buyer-nav a:hover{color:#79dbbe}
.buyer-hero{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.58fr);gap:42px;align-items:center;padding:78px clamp(20px,7vw,100px);color:#fff;background:linear-gradient(120deg,#0b2133,#174d6a)}.eyebrow{margin:0 0 10px;color:#71d9bd;font-size:12px;font-weight:900;letter-spacing:.14em;text-transform:uppercase}.buyer-hero h1{max-width:850px;margin:0;font-size:clamp(38px,5vw,68px);line-height:1.05}.buyer-hero p{max-width:760px;margin:22px 0 0;color:#d8e4ec;font-size:18px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border:1px solid transparent;border-radius:5px;color:#fff;background:var(--red);font-weight:900}.button.secondary{border-color:#94aebe;background:transparent}.buyer-proof{padding:24px;border:1px solid rgba(255,255,255,.16);border-radius:10px;background:rgba(255,255,255,.08)}.buyer-proof strong{display:block;margin-bottom:12px;font-size:19px}.buyer-proof ul{margin:0;padding-left:20px;color:#dce9ef}
.buyer-section{padding:68px clamp(20px,7vw,100px)}.buyer-section.white{background:#fff}.section-head{max-width:760px;margin-bottom:30px}.section-head h2{margin:0;font-size:clamp(28px,3.5vw,42px);line-height:1.15}.section-head p{color:var(--muted)}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.buyer-card{padding:24px;border:1px solid var(--line);border-radius:9px;background:#fff;box-shadow:0 10px 28px rgba(16,36,51,.06)}.buyer-card h3{margin:0 0 10px;font-size:20px}.buyer-card p{margin:0;color:var(--muted)}.chip-list{display:flex;flex-wrap:wrap;gap:9px}.chip{padding:8px 12px;border-radius:999px;color:#155846;background:#e8f6f1;font-size:13px;font-weight:900}.honesty-note{margin-top:24px;padding:18px 20px;border-left:4px solid var(--teal);background:#eaf6f3;color:#244a48}.buyer-products{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.buyer-product{overflow:hidden;border:1px solid var(--line);border-radius:8px;background:#fff}.buyer-product img{width:100%;height:190px;padding:18px;object-fit:contain;background:#f7fafb}.buyer-product div{padding:16px}.buyer-product strong{display:block;margin-bottom:5px}.buyer-product span{color:var(--muted);font-size:13px}
.quote-wrap{display:grid;grid-template-columns:minmax(0,.7fr) minmax(360px,1fr);gap:36px;align-items:start}.quote-form{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:26px;border:1px solid var(--line);border-radius:10px;background:#fff}.quote-form label{display:grid;gap:6px;font-size:13px;font-weight:900}.quote-form .wide{grid-column:1/-1}.quote-form input,.quote-form select,.quote-form textarea{width:100%;min-height:46px;border:1px solid #cbd7df;border-radius:5px;padding:10px 12px;font:inherit}.quote-form button{grid-column:1/-1;border:0;cursor:pointer}.catalog-download{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.buyer-footer{display:flex;justify-content:space-between;gap:24px;padding:32px clamp(20px,7vw,100px);color:#c4d1db;background:#0d1d2a}.buyer-footer strong{color:#fff}
.form-status{margin:0;color:#168f7b;font-weight:800}.quote-form button:disabled{opacity:.65;cursor:wait}
@media(max-width:960px){.buyer-hero,.quote-wrap{grid-template-columns:1fr}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.buyer-products{grid-template-columns:repeat(2,minmax(0,1fr))}.buyer-nav{display:none}}
@media(max-width:620px){.buyer-hero{padding:54px 18px}.buyer-section{padding:50px 18px}.card-grid,.buyer-products,.quote-form{grid-template-columns:1fr}.quote-form .wide{grid-column:auto}.quote-form button{grid-column:auto}.buyer-footer{flex-direction:column}.buyer-header{min-height:64px}}