/* ===== 凯颜医疗集团 · 官网样式表 ===== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root{
  --paper:#F2F7F8;
  --ink:#0F2027;
  --muted:#5A6B72;
  --line:rgba(15,32,39,.12);
  --dark:#0C1620;
  --brand:#159BB3;
  --brand-deep:#0E7C93;
  --brand-tint:#B7E5EA;
  --accent:#E8524A;
  --serif:'Noto Serif SC',serif;
  --sans:'Noto Sans SC',sans-serif;
  --maxw:1200px;
  --pad:clamp(24px,5vw,72px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;line-height:1.6;overflow-x:hidden}
h1,h2,h3,h4,h5{font-family:var(--serif);font-weight:600;line-height:1.15;margin:0}
p{margin:0}
img{display:block;max-width:100%}
a{color:var(--brand-deep);text-decoration:none;transition:color .25s}
a:hover{color:var(--brand)}
::selection{background:var(--ink);color:var(--paper)}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.eyebrow{font-size:12px;letter-spacing:.28em;color:#8A959A;font-weight:500;text-transform:uppercase}
.section{padding:clamp(72px,10vw,140px) 0}
.serif{font-family:var(--serif)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:500;font-size:15px;padding:15px 30px;border-radius:100px;cursor:pointer;transition:transform .3s,background .3s,border-color .3s;border:1px solid transparent;font-family:inherit}
.btn-dark{background:var(--ink);color:var(--paper)}
.btn-dark:hover{background:#000;color:var(--paper);transform:translateY(-2px)}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px)}
.btn-ghost{border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-2px)}
.btn-light{background:var(--paper);color:var(--ink)}
.btn-light:hover{transform:translateY(-2px);color:var(--ink)}

/* ===== NAV ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:18px var(--pad);transition:background .4s,box-shadow .4s,padding .4s;background:rgba(242,247,248,0)}
.nav.scrolled{background:rgba(242,247,248,.85);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line);padding:12px var(--pad)}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-tint) 55%,var(--accent));flex:none}
.brand-name{font-family:var(--serif);font-weight:600;font-size:18px;letter-spacing:.02em;line-height:1.05;white-space:nowrap}
.brand-en{font-size:9px;letter-spacing:.32em;color:var(--muted);font-weight:500;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:clamp(12px,1.8vw,30px)}
.nav-links a{font-size:14px;font-weight:400;color:#41525A;position:relative;padding:4px 0}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--ink);font-weight:500}
.nav-links a.active::after{content:"";position:absolute;left:0;bottom:-2px;height:2px;width:100%;background:linear-gradient(90deg,var(--brand),var(--accent))}
.nav-cta{background:var(--ink);color:#fff!important;padding:10px 20px;border-radius:100px;font-weight:500}
.nav-cta:hover{background:#000;transform:translateY(-1px)}
.nav-cta::after{display:none!important}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--ink);transition:.3s}

/* ===== HERO ===== */
.hero{position:relative;max-width:1320px;margin:0 auto;padding:clamp(150px,20vh,220px) var(--pad) clamp(70px,9vw,110px);overflow:hidden}
.hero-glow{position:absolute;border-radius:50%;filter:blur(60px);z-index:0;animation:glowPulse 10s ease-in-out infinite}
.hero-inner{position:relative;z-index:2;max-width:900px}
.hero h1{font-size:clamp(38px,6vw,84px);letter-spacing:-.01em;margin-bottom:26px}
.hero-lead{font-size:clamp(17px,1.7vw,22px);color:var(--muted);font-weight:300;max-width:640px;margin-bottom:38px}
.grad-text{background:linear-gradient(90deg,var(--brand),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.badge{display:inline-flex;align-items:center;gap:10px;padding:8px 16px;border:1px solid var(--line);border-radius:100px;font-size:13px;color:#41525A;margin-bottom:32px}
.badge .dot{width:7px;height:7px;border-radius:50%;background:linear-gradient(90deg,var(--brand),var(--accent))}
.btn-row{display:flex;gap:14px;flex-wrap:wrap}

/* cert strip */
.cert-strip{display:flex;flex-wrap:wrap;align-items:center;gap:clamp(16px,3vw,40px);padding-top:34px;margin-top:44px;border-top:1px solid var(--line)}
.cert-strip .items{display:flex;flex-wrap:wrap;gap:clamp(14px,2.4vw,30px);font-family:var(--serif);font-weight:500;font-size:clamp(14px,1.4vw,17px);color:#33454C}

/* ===== FOOTER ===== */
.footer{background:var(--dark);color:var(--paper);padding:clamp(64px,8vw,100px) var(--pad) 40px}
.footer-grid{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:clamp(32px,5vw,64px)}
.footer-brand{grid-column:1/-1;max-width:340px}
.footer-brand p{color:#8695A0;font-weight:300;font-size:14px;margin-top:16px}
.footer h5{font-size:12px;letter-spacing:.2em;color:#6C7A82;text-transform:uppercase;margin-bottom:16px;font-weight:600;font-family:var(--sans)}
.footer .col{display:flex;flex-direction:column;gap:11px}
.footer .col a,.footer .col span{color:#C3CDD2;font-size:14px}
.footer .col a:hover{color:#fff}
.footer .chips{display:flex;flex-wrap:wrap;gap:8px;max-width:210px}
.footer .chips span{font-size:11px;color:#93A0A7;border:1px solid rgba(255,255,255,.14);padding:4px 9px;border-radius:6px}
.footer-bottom{max-width:var(--maxw);margin:clamp(40px,5vw,64px) auto 0;padding-top:26px;border-top:1px solid rgba(255,255,255,.1);display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;color:#6C7A82;font-size:12px}

/* reveal */
[data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .9s cubic-bezier(.16,1,.3,1),transform .9s cubic-bezier(.16,1,.3,1)}
[data-reveal].in{opacity:1;transform:none}

@keyframes glowPulse{0%,100%{opacity:.5;transform:scale(1)}50%{opacity:.8;transform:scale(1.06)}}
@keyframes spectrumShift{0%{background-position:0% 50%}100%{background-position:300% 50%}}
@keyframes marqueeX{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* ===== responsive nav ===== */
@media(max-width:860px){
  .nav-toggle{display:flex}
  .nav-links{position:fixed;top:0;right:0;height:100vh;width:min(78vw,320px);flex-direction:column;align-items:flex-start;justify-content:center;gap:22px;background:var(--dark);padding:40px;transform:translateX(100%);transition:transform .4s cubic-bezier(.16,1,.3,1);z-index:200}
  .nav-links.open{transform:translateX(0)}
  .nav-links a{color:#C3CDD2;font-size:18px}
  .nav-links a:hover,.nav-links a.active{color:#fff}
  .nav-links a.active::after{display:none}
  .nav-cta{background:var(--brand)}
  .nav-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:150;opacity:0;pointer-events:none;transition:opacity .3s}
  .nav-backdrop.open{opacity:1;pointer-events:auto}
}

/* ===== components ===== */
.dark-sec{background:var(--dark);color:var(--paper)}
.tint-sec{background:#E7F1F2}
.center{text-align:center}
.sec-head{max-width:720px;margin:0 auto clamp(44px,6vw,68px)}
.sec-head.left{margin-left:0}
.sec-head h2{font-size:clamp(28px,3.8vw,50px);margin:16px 0}
.sec-head p{color:var(--muted);font-weight:300;font-size:17px}
.dark-sec .sec-head p{color:#AEB9BF}

/* stats grid */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.1)}
.stat{background:var(--dark);padding:clamp(24px,3vw,40px) clamp(18px,2vw,28px)}
.stat .num{font-family:var(--serif);font-weight:600;font-size:clamp(34px,4.4vw,58px);line-height:1;background:linear-gradient(120deg,#F2F7F8,#9FC6CE);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat .lab{margin-top:12px;color:#9FAAB0;font-size:14px;font-weight:300}

/* generic card */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(26px,3vw,38px);transition:transform .4s cubic-bezier(.16,1,.3,1),box-shadow .4s}
.card h3{font-size:22px;margin-bottom:12px}
.card p{color:var(--muted);font-weight:300;font-size:15px}
.card-hover:hover{transform:translateY(-6px);box-shadow:0 24px 50px -22px rgba(15,32,39,.28)}
.icon-badge{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--serif);font-weight:600;font-size:19px;margin-bottom:20px}
.list-row{display:flex;gap:14px;padding:14px 0;border-top:1px solid var(--line)}
.list-row .d{width:6px;height:6px;border-radius:50%;margin-top:9px;flex:none}
.list-row span.t{font-size:15px;color:#26343B}

/* market bars */
.chart{display:flex;align-items:flex-end;gap:clamp(8px,1.6vw,20px);height:230px}
.bar-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:10px;height:100%;justify-content:flex-end}
.bar{width:100%;height:0;border-radius:8px 8px 0 0;background:linear-gradient(180deg,var(--brand),var(--brand-deep));transition:height 1.1s cubic-bezier(.16,1,.3,1)}
.bar-v{font-size:13px;font-weight:500;font-family:var(--serif)}
.bar-y{font-size:12px;color:#8A959A}

/* split layout */
.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:clamp(40px,6vw,80px);align-items:center}
.media{position:relative;border-radius:22px;overflow:hidden;aspect-ratio:4/3;background:#dfe9ea}
.media img{width:100%;height:100%;object-fit:cover}
.media.tall{aspect-ratio:3/4}

/* timeline */
.timeline{position:relative}
.timeline .rail{position:absolute;left:0;right:0;top:9px;height:2px;background:linear-gradient(90deg,var(--brand),var(--accent));opacity:.4}
.tl-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:28px}
.tl-dot{width:14px;height:14px;border-radius:50%;background:var(--ink);border:4px solid var(--paper);box-shadow:0 0 0 2px var(--ink)}
.tl-year{font-family:var(--serif);font-weight:600;font-size:26px}

/* spectrum */
.spectrum-bar{height:14px;border-radius:100px;background:linear-gradient(90deg,#8B5CF6,#3B82F6,#22D3EE,#22C55E,#FDE047,#FB923C,#EF4444,#7F1D1D);margin-bottom:36px}
.spectrum-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.spectrum-cell{background:#fff;padding:clamp(20px,2.4vw,28px)}

/* ===== products ===== */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:clamp(36px,4vw,52px)}
.filter-btn{border:1px solid var(--line);background:#fff;color:#41525A;padding:10px 22px;border-radius:100px;font-family:inherit;font-size:14px;font-weight:500;cursor:pointer;transition:.25s}
.filter-btn:hover{border-color:var(--brand)}
.filter-btn.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.prod-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:transform .4s cubic-bezier(.16,1,.3,1),box-shadow .4s;color:var(--ink)}
.prod-card:hover{transform:translateY(-6px);box-shadow:0 22px 44px -22px rgba(15,32,39,.3);color:var(--ink)}
.prod-thumb{aspect-ratio:1/1;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden;border-bottom:1px solid var(--line)}
.prod-thumb img{width:100%;height:100%;object-fit:contain;padding:8%;transition:transform .5s}
.prod-card:hover .prod-thumb img{transform:scale(1.05)}
.prod-body{padding:20px;display:flex;flex-direction:column;gap:6px;flex:1}
.prod-cat{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--brand-deep);font-weight:500}
.prod-name{font-family:var(--serif);font-weight:600;font-size:18px;line-height:1.3}
.prod-code{font-size:12px;color:#8A959A;font-variant-numeric:tabular-nums;margin-top:auto}
.prod-hidden{display:none!important}

/* product detail */
.pd-hero{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:clamp(32px,5vw,64px);align-items:start}
.pd-img{border-radius:22px;overflow:hidden;background:#fff;border:1px solid var(--line);aspect-ratio:1/1;display:flex;align-items:center;justify-content:center}
.pd-img img{width:100%;height:100%;object-fit:contain;padding:6%}
.pd-life{border-radius:18px;overflow:hidden;margin-top:16px;aspect-ratio:16/10}
.pd-life img{width:100%;height:100%;object-fit:cover}
.spec-table{width:100%;border-collapse:collapse;margin-top:24px}
.spec-table tr{border-top:1px solid var(--line)}
.spec-table tr:last-child{border-bottom:1px solid var(--line)}
.spec-table th{text-align:left;padding:13px 0;color:var(--muted);font-weight:400;font-size:14px;width:38%;vertical-align:top}
.spec-table td{padding:13px 0;font-weight:500;font-size:14px}
.chip{display:inline-block;font-size:12px;color:#33454C;background:#E7F1F2;padding:5px 12px;border-radius:8px;font-weight:500;margin:0 6px 6px 0}
.breadcrumb{display:flex;gap:8px;font-size:13px;color:#8A959A;margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:#8A959A}
.breadcrumb a:hover{color:var(--brand)}

/* logo marquee */
.marquee{overflow:hidden}
.marquee-track{display:flex;width:max-content;gap:clamp(40px,6vw,90px);animation:marqueeX 32s linear infinite;opacity:.6}
.marquee-track span{font-family:var(--serif);font-weight:500;font-size:clamp(20px,2.4vw,30px);color:#33454C;white-space:nowrap}

/* forms */
.field{display:flex;flex-direction:column;gap:7px;font-size:13px;color:var(--muted)}
.field input,.field textarea,.field select{border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:15px;background:#FAFCFC;outline:none;transition:border-color .25s;font-family:inherit}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--brand)}
.field ::placeholder{color:#A7B2B8}

@media(max-width:600px){
  .footer-bottom{flex-direction:column;gap:6px}
}