*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;line-height:1.72;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em}
.wrap{width:min(1160px,calc(100% - 40px));margin:0 auto}
.bm{width:1.5em;height:1.5em;flex:0 0 auto}
.brand{display:inline-flex;align-items:center;gap:.55em;font-weight:700;letter-spacing:.01em}
.brand-name{display:inline-flex;align-items:baseline;gap:.4em;font-size:19px}
.brand-name em{font-style:normal;font-size:12px;letter-spacing:.16em;opacity:.62;text-transform:uppercase}
.btn{padding:13px 24px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .18s,background .18s,border-color .18s;background:var(--accent);color:var(--on-accent)}
.btn:not([hidden]){display:inline-flex;align-items:center;justify-content:center;gap:.5em}
.btn:hover{transform:translateY(-2px)}
.btn-line{background:transparent;border-color:var(--line);color:var(--fg)}
.btn-line:hover{border-color:var(--accent);color:var(--accent)}
.btn-ghost{background:transparent;border-color:currentColor;color:inherit;opacity:.85}
.eyebrow{margin:0 0 10px;font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);font-weight:700}
.sec-head{max-width:720px;margin:0 0 34px}
.sec-head h2{font-size:clamp(26px,3.4vw,38px)}
.sec-sub{margin-top:12px;color:var(--mut);font-size:16px;max-width:62ch}
.dl-band{padding:clamp(56px,7vw,92px) 0}
.dl-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;max-width:1020px;margin:0 auto}
.dl-band:not(:has(.dl-card:not([hidden]))){display:none}
.dl-card{flex:1 1 250px;max-width:320px;padding:26px 24px;border:1px solid var(--line);border-radius:14px;background:var(--card);color:var(--fg);transition:transform .2s,border-color .2s,box-shadow .2s}
.dl-card:not([hidden]){display:flex;flex-direction:column;gap:8px}
.dl-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 14px 36px rgba(0,0,0,.12)}
.dl-ch{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:700}
.dl-name{font-size:21px}
.dl-desc{font-size:14px;color:var(--mut);flex:1}
.dl-go{margin-top:10px;font-size:14px;font-weight:700;color:var(--accent)}
.dl-note{margin-top:20px;font-size:13px;color:var(--mut)}
.faq{padding:clamp(56px,7vw,96px) 0}
.qa-list{max-width:860px;border-top:1px solid var(--line)}
.qa{border-bottom:1px solid var(--line);padding:18px 0}
.qa summary{display:flex;justify-content:space-between;gap:18px;cursor:pointer;font-weight:600;font-size:16px;list-style:none}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";color:var(--accent);font-weight:700}
.qa[open] summary::after{content:"–"}
.qa p{margin-top:12px;color:var(--mut);font-size:15px;max-width:70ch}
.foot{border-top:1px solid var(--line);padding:56px 0 26px;background:var(--bg2)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.foot-brand p{margin-top:16px;font-size:14px;color:var(--mut);max-width:44ch}
.foot-col h3{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--mut);margin-bottom:14px}
.foot-col li{margin-bottom:10px}
.foot-col a{font-size:14px;color:var(--fg);opacity:.78}
.foot-col a:hover{opacity:1;color:var(--accent)}
.foot-base{margin-top:44px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.foot-base p{font-size:12px;color:var(--mut)}
@media (max-width:900px){
 .foot-grid{grid-template-columns:1fr 1fr}
 .sec-head{margin-bottom:26px}
}
@media (max-width:620px){
 .wrap{width:calc(100% - 32px)}
 .foot-grid{grid-template-columns:1fr;gap:26px}
 .nav-links{display:none}
 .btn{padding:11px 18px;font-size:14px}
}

:root{--bg:#ffffff;--bg2:#ffffff2;--card:#ffffff;--fg:#10201a;--mut:#566b62;--line:#dfeae5;--accent:#0f7b5f;--accent2:#0ea5a4;--on-accent:#ffffff}
.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:26px;height:70px}
.nav-links{display:flex;gap:24px;margin-left:auto;font-size:14px;color:var(--mut)}
.nav-links a:hover{color:var(--accent)}
.nav-cta{padding:9px 18px;font-size:13px}
.hero{padding:clamp(56px,8vw,96px) 0 0;text-align:center;background:radial-gradient(circle at 50% 0,var(--bg2),transparent 65%)}
.hero .eyebrow{display:inline-block;padding:6px 14px;border:1px solid var(--line);border-radius:99px;background:var(--bg)}
.hero h1{font-size:clamp(34px,4.8vw,56px);max-width:16ch;margin:18px auto 0;letter-spacing:-.02em;text-wrap:balance}
.hero-lead{max-width:56ch;margin:20px auto 0;font-size:17px;color:var(--mut)}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:30px}
.hero-note{margin-top:14px;font-size:12px;color:var(--mut)}
.frame{width:min(430px,100%);margin:44px auto -60px;border:1px solid var(--line);border-radius:20px;overflow:hidden;background:var(--card);box-shadow:0 30px 60px rgba(16,24,40,.12)}
.frame-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--bg2)}
.frame-bar i{width:9px;height:9px;border-radius:50%;background:var(--line)}
.frame-bar span{margin-left:10px;font-size:11px;color:var(--mut);letter-spacing:.08em}
.frame-media{aspect-ratio:9/16;display:flex;align-items:center;justify-content:center;background:#0c1017}
.frame-media img{width:100%;height:100%;object-fit:contain}
.gallery{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.gallery figure{margin:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--card)}
.gallery .media{height:500px;display:flex;align-items:center;justify-content:center;padding:20px;background:radial-gradient(circle at 50% 32%,rgba(80,110,150,.2),transparent 60%),#0c1017}
.gallery img{height:100%;width:auto;max-width:100%;object-fit:contain}
.gallery figcaption{padding:12px 16px;font-size:12px;color:var(--mut);border-top:1px solid var(--line)}
.spec{width:100%;border-collapse:collapse;font-size:14.5px}
.spec th,.spec td{padding:16px 18px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.spec th{width:150px;font-weight:600;color:var(--fg);white-space:nowrap}
.spec td{color:var(--mut)}
.spec tr:first-child th,.spec tr:first-child td{border-top:1px solid var(--line)}
.shot-split{display:grid;grid-template-columns:.78fr 1.22fr;gap:clamp(24px,4vw,52px);align-items:center}
.shot-split figure{margin:0;height:540px;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#0c1017}
.shot-split .media{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;padding:18px;background:radial-gradient(circle at 50% 30%,rgba(80,110,150,.2),transparent 62%),#0c1017}
.shot-split img{height:100%;width:auto;max-width:100%;object-fit:contain}
.shot-split figcaption{padding:12px 16px;font-size:12px;color:var(--mut);border-top:1px solid var(--line);background:var(--card)}
.band{padding:clamp(56px,7vw,92px) 0}
.band-soft{background:var(--bg2)}
.quick{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:0}
.quick div{padding:24px;border-radius:16px;background:var(--card);border:1px solid var(--line);text-align:left}
.quick em{font-style:normal;font-size:12px;font-weight:700;color:var(--accent);letter-spacing:.16em}
.quick h3{font-size:17px;margin:10px 0 6px}
.quick p{font-size:14px;color:var(--mut)}
.feat4{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.card{padding:30px;border:1px solid var(--line);border-radius:18px;background:var(--card)}
.card h3{font-size:19px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--mut)}
.card .k{display:inline-flex;width:34px;height:34px;border-radius:10px;background:var(--bg2);color:var(--accent);align-items:center;justify-content:center;font-size:13px;font-weight:700;margin-bottom:16px}
.split{display:grid;grid-template-columns:.95fr 1.05fr;gap:clamp(28px,5vw,60px);align-items:start}
.split h2{font-size:clamp(26px,3.2vw,36px);margin-bottom:14px}
.split .lead{color:var(--mut);font-size:15.5px}
.checklist{margin-top:22px;display:grid;gap:0;border-top:1px solid var(--line)}
.checklist li{display:grid;grid-template-columns:26px 1fr;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);font-size:14px;color:var(--mut)}
.checklist li b{display:block;color:var(--fg);font-size:15px;margin-bottom:2px}
.checklist li::before{content:"✓";color:var(--accent);font-weight:700}
.note{padding:22px 24px;border-radius:14px;background:var(--bg2);border:1px solid var(--line);font-size:14px;color:var(--mut)}
.note b{color:var(--fg)}
.scene{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.scene div{padding:26px;border-radius:18px;background:var(--bg2);border:1px solid var(--line)}
.scene span{font-size:11px;letter-spacing:.16em;color:var(--accent);font-weight:700}
.scene h3{font-size:17px;margin:10px 0 6px}
.scene p{font-size:14px;color:var(--mut)}
.article{max-width:800px}
.article article{padding:26px 0;border-top:1px solid var(--line)}
.article article:first-of-type{border-top:0;padding-top:0}
.article h3{font-size:21px;margin-bottom:10px}
.article p{color:var(--mut);font-size:15px;margin-bottom:10px}
.sec-safe{background:var(--bg2)}
.safe4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.safe4 div{padding:24px;background:var(--card);border:1px solid var(--line);border-radius:16px}
.safe4 h3{font-size:15px;margin-bottom:6px}
.safe4 p{font-size:13px;color:var(--mut)}
.faq{background:var(--card)}
.cta{padding:clamp(56px,7vw,88px) 0;background:linear-gradient(135deg,var(--accent),var(--accent2));color:var(--on-accent)}
.cta-in{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cta h2{font-size:clamp(26px,3.4vw,38px);color:var(--on-accent)}
.cta p{margin-top:10px;opacity:.86;max-width:52ch}
.cta .btn{background:var(--on-accent);color:var(--accent)}
@media (max-width:980px){
 .feat4,.safe4{grid-template-columns:repeat(2,1fr)}
 .split{grid-template-columns:1fr}
 .frame{margin-bottom:-40px}
}
@media (max-width:620px){
 .quick,.scene,.feat4,.safe4{grid-template-columns:1fr}
 .gallery{grid-template-columns:1fr}
 .gallery .media{height:300px}
 .hero h1{font-size:31px}
 .frame{margin-top:30px;border-radius:14px}
 .frame img{max-height:260px}
 .cta .btn{width:100%}
}