:root{--bg:#fff;--ink:#1d1d1f;--muted:#6e6e73;--blue:#0356a4;--hair:rgba(0,0,0,.08);
--pad:clamp(22px,4vw,56px);--maxw:1100px}
*{margin:0;padding:0;box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:'Manrope',sans-serif;-webkit-font-smoothing:antialiased}
img{display:block;width:100%}a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--hair)}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);height:52px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px}.logo img{width:34px;height:auto}
.logo b{font-size:14px;letter-spacing:.18em;font-weight:800}
.links{display:flex;align-items:center;gap:26px}
.links a{font-size:12.5px;font-weight:600;color:rgba(29,29,31,.72)}.links a:hover{color:var(--ink)}
.links a.on{color:var(--blue);font-weight:800}.links .cta{font-weight:700;color:var(--blue)}
.burger{display:none;background:none;border:0;cursor:pointer;padding:6px}
.burger span{display:block;width:20px;height:1.8px;background:var(--ink);margin:5px 0}
.mobile-menu{display:none;background:#fff;border-bottom:1px solid var(--hair);padding:8px var(--pad) 18px}
.mobile-menu a{display:block;padding:13px 0;font-size:17px;font-weight:600;border-bottom:1px solid var(--hair)}
.mobile-menu.open{display:block}
.tlink{display:inline-flex;align-items:center;gap:7px;color:var(--blue);font-size:16px;font-weight:600}
.tlink svg{transition:transform .25s}.tlink:hover svg{transform:translateX(4px)}
.tlink:hover{text-decoration:underline;text-underline-offset:4px}.tlink.small{font-size:14.5px}
.page-hero{padding:clamp(22px,3.2vh,36px) 0 clamp(8px,1.5vh,14px)}
.page-hero .eyebrow{font-family:'Space Grotesk';font-size:12px;font-weight:700;letter-spacing:.26em;text-transform:uppercase;color:var(--muted);margin-bottom:18px}
.page-hero h1{font-size:clamp(32px,4vw,54px);font-weight:800;letter-spacing:-.022em;line-height:1.06;max-width:24ch}
.page-hero p.lead{margin-top:14px;font-size:clamp(15px,1.5vw,19px);line-height:1.6;color:var(--muted);max-width:58ch}
.section{padding:clamp(20px,2.8vh,32px) 0}
.section.tight{padding-top:0}
.eyebrow-dark{font-family:'Space Grotesk';font-size:12px;font-weight:700;letter-spacing:.26em;text-transform:uppercase;color:var(--muted);margin-bottom:18px}
h2.sec{font-size:clamp(28px,3.4vw,48px);font-weight:800;letter-spacing:-.02em;line-height:1.12;max-width:22ch}
h3.card-t{font-size:20px;font-weight:800;letter-spacing:-.01em;margin:14px 0 10px}
.svc{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,3.5vw,52px);align-items:center;padding:clamp(16px,2.5vh,26px) 0;border-top:1px solid var(--hair)}
.svc:first-of-type{border-top:0;padding-top:0}
.svc img{aspect-ratio:3/2;object-fit:cover;border-radius:6px;box-shadow:0 20px 48px -24px rgba(0,0,0,.28)}
.svc ul{margin:16px 0 0 0;list-style:none}
.svc ul li{padding:7px 0 7px 26px;position:relative;font-size:14.5px;line-height:1.55;color:var(--ink-dim,#3c3f43)}
.svc ul li::before{content:'';position:absolute;left:0;top:14px;width:14px;height:1.5px;background:var(--blue)}
.svc .tlink{margin-top:22px}
.ground{background:#111214;color:#f5f5f7;padding:clamp(34px,5vh,62px) 0}
.ground h2{font-size:clamp(28px,3.6vw,50px);font-weight:800;letter-spacing:-.02em;line-height:1.12}
.ground p{margin-top:18px;font-size:15.5px;line-height:1.7;color:rgba(245,245,247,.68);max-width:56ch}
.ground .eyebrow{font-family:'Space Grotesk';font-size:12px;font-weight:700;letter-spacing:.26em;text-transform:uppercase;color:rgba(245,245,247,.55);margin-bottom:18px}
.ground .tlink{color:#7db4e8}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;margin-top:22px}
.step{border-top:1px solid var(--ink);padding-top:16px}
.step .n{font-family:'Space Grotesk';font-size:12.5px;font-weight:700;color:var(--blue);letter-spacing:.08em}
.step h4{margin-top:10px;font-size:18px;font-weight:800}
.step p{margin-top:8px;font-size:13.5px;line-height:1.6;color:var(--muted)}
.step .recv{margin-top:10px;font-size:12px;color:var(--ink);font-weight:700}
.step .recv span{color:var(--muted);font-weight:500}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:24px}
.card{background:#f5f5f7;border-radius:10px;overflow:hidden;transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-4px);box-shadow:0 20px 44px -18px rgba(0,0,0,.25)}
a.vcard{transition:transform .25s,box-shadow .25s}
a.vcard:hover{transform:translateY(-4px);box-shadow:0 20px 44px -18px rgba(0,0,0,.22)}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:2px}
.card img{aspect-ratio:16/10;object-fit:cover}
.card .pad{padding:20px 22px 24px}
.card .tag{font-family:'Space Grotesk';font-size:10px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--blue)}
.card h4{margin-top:8px;font-size:17px;font-weight:800;line-height:1.35}
.card p{margin-top:8px;font-size:13px;line-height:1.6;color:var(--muted)}
.card .meta{margin-top:12px;font-size:11.5px;color:var(--muted)}
.note{display:inline-flex;align-items:center;gap:8px;background:#eef4fb;color:#0356a4;border-radius:999px;padding:8px 16px;font-size:12px;font-weight:700}
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:32px}
.vcard{background:#f5f5f7;border-radius:10px;overflow:hidden}
.vcard .thumb{position:relative}
.vcard img{aspect-ratio:16/10;object-fit:cover}
.vcard .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.vcard .play i{width:52px;height:52px;border-radius:50%;background:rgba(255,255,255,.92);display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(0,0,0,.3)}
.vcard video{width:100%;aspect-ratio:16/10;object-fit:cover;display:block;background:#000}
.vcard .pad{padding:18px 20px 22px}
.vcard h4{font-size:16px;font-weight:800;line-height:1.4}
.vcard p{margin-top:7px;font-size:12.5px;line-height:1.6;color:var(--muted)}
.form-card{max-width:640px;margin:44px auto 0;background:#f5f5f7;border-radius:14px;padding:clamp(26px,4vw,44px)}
.form-card label{display:block;font-size:13px;font-weight:700;margin:20px 0 8px}
.form-card label:first-child{margin-top:0}
.form-card input,.form-card textarea{width:100%;border:1px solid rgba(0,0,0,.16);border-radius:10px;padding:13px 15px;font-family:inherit;font-size:15px;background:#fff}
.form-card input:focus,.form-card textarea:focus{outline:2px solid var(--blue);border-color:transparent}
.form-card .req{color:#c22}
.form-card .opt{color:var(--muted);font-weight:500;font-size:12px}
.form-card button{width:100%;margin-top:26px;background:var(--ink);color:#fff;border:0;border-radius:999px;padding:16px;font-size:15px;font-weight:800;cursor:pointer;transition:.2s}
.form-card button:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(0,0,0,.22)}
.contact-cards{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:640px;margin:36px auto 0}
.contact-cards .cc{background:#fff;border:1px solid var(--hair);border-radius:12px;padding:20px 22px}
.contact-cards .cc b{display:block;font-size:15px}
.contact-cards .cc span{display:block;margin-top:6px;font-size:13px;color:var(--muted);line-height:1.55}
.bigcta{background:#1d1d1f;color:#fff;text-align:center;padding:clamp(36px,5.5vh,68px) 0}
.bigcta h2{font-size:clamp(30px,3.8vw,52px);font-weight:800;letter-spacing:-.02em;line-height:1.12}
.bigcta p{margin:18px auto 0;font-size:clamp(15px,1.4vw,18px);color:rgba(255,255,255,.72);max-width:52ch;line-height:1.6}
.bigcta .btn{display:inline-block;margin-top:30px;background:#fff;color:#1d1d1f;font-size:16px;font-weight:700;padding:15px 34px;border-radius:999px}
footer{background:#f5f5f7;border-top:1px solid var(--hair);padding:clamp(40px,6vh,60px) 0 0;font-size:13px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.3fr;gap:clamp(24px,3.5vw,48px);padding-bottom:40px}
.foot-brand img{width:42px;height:auto;margin-bottom:16px}
.foot-brand p{color:var(--muted);line-height:1.65;max-width:30ch;font-size:13px}
.foot-col h5{font-family:'Space Grotesk';font-size:11px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;margin-bottom:16px}
.foot-col a{display:block;padding:5px 0;color:var(--muted);font-size:13.5px}.foot-col a:hover{color:var(--ink)}
.foot-contact a{display:flex;align-items:center;gap:9px}.foot-contact svg{flex:none;opacity:.55}
.foot-sla{margin-top:14px;display:inline-flex;align-items:center;gap:8px;background:#e8f0d8;border-radius:999px;padding:7px 14px;font-size:11.5px;font-weight:700;color:#3d5a45}
.foot-sla i{width:7px;height:7px;border-radius:50%;background:#5a8a4a}
.foot-social{display:flex;gap:14px;margin-top:16px}
.foot-social a{display:flex;align-items:center;justify-content:center;width:34px;height:34px;border:1px solid rgba(0,0,0,.14);border-radius:50%;color:var(--muted)}
.foot-social a:hover{color:#fff;background:var(--ink);border-color:var(--ink)}
.foot-legal{border-top:1px solid var(--hair);padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:var(--muted);font-size:12px}

/* ---------- motion ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.6,.2,1),transform .7s cubic-bezier(.2,.6,.2,1)}
.rv.in{opacity:1;transform:none}
.carousel{position:absolute;inset:0}
.car-slide{position:absolute;inset:0;opacity:0;transition:opacity .9s ease}
.car-slide.on{opacity:1}
.car-slide img{width:100%;height:100%;object-fit:cover}
/* 无缩放无位移：只做平滑淡切，图片保持原始状态 */
.car-dots{position:absolute;right:var(--pad);bottom:26px;display:flex;gap:8px;z-index:3}
.car-dots i{width:22px;height:3px;background:rgba(255,255,255,.4);border-radius:2px;cursor:pointer;transition:.3s}
.car-dots i.on{background:#fff}
.tabbar{display:flex;gap:10px;margin:26px 0 6px;flex-wrap:wrap}
.tabbar button{border:1px solid rgba(0,0,0,.18);background:#fff;border-radius:999px;padding:9px 20px;font-size:13px;font-weight:700;cursor:pointer;font-family:inherit;transition:.2s}
.tabbar button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.ph-grid{display:grid;grid-auto-flow:column;grid-auto-columns:230px;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px;scrollbar-width:none}
  .ph-grid::-webkit-scrollbar{display:none}
  .ph-grid figure{scroll-snap-align:start}
.ph-grid figure{position:relative}
.ph-grid img{aspect-ratio:1;object-fit:cover;border-radius:6px}
.ph-grid figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 12px 10px;font-size:10.5px;font-weight:600;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.6));border-radius:0 0 6px 6px;line-height:1.4}
@media(max-width:900px){header.hero-m{min-height:420px!important}}
  @media(max-width:520px){header.hero-m{min-height:380px!important}}
@media(max-width:520px){
.section{padding:26px 0}
.page-hero{padding:30px 0 14px}
.cards,.video-grid,.hscroll{margin-top:22px}
.steps{margin-top:22px;gap:22px}
}

.hscroll{display:grid;grid-auto-flow:column;grid-auto-columns:clamp(240px,26vw,330px);gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:10px;scrollbar-width:none}
.hscroll::-webkit-scrollbar{display:none}
.hscroll>*{scroll-snap-align:start}
.hscroll .card img,.hscroll .vcard img,.hscroll .vcard video{aspect-ratio:16/10;object-fit:cover}
.hscroll .card,.hscroll .vcard{height:fit-content}
.hscroll-hint{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:11.5px;color:var(--muted);font-family:'Space Grotesk';letter-spacing:.14em;text-transform:uppercase}
.hscroll-hint i{display:block;width:34px;height:1.5px;background:rgba(0,0,0,.25)}

/* ---------- 迁移长文正文 ---------- */
.prose{max-width:720px;margin:0 auto}
.prose h2{font-size:clamp(22px,2.4vw,30px);font-weight:800;letter-spacing:-.015em;margin:38px 0 14px;padding-top:26px;border-top:1px solid var(--hair)}
.prose h2:first-child{border-top:0;padding-top:0;margin-top:0}
.prose h3{font-size:17px;font-weight:800;margin:26px 0 8px}
.prose h4{font-size:15.5px;font-weight:800;margin:22px 0 8px}
.prose p{font-size:15px;line-height:1.75;color:#3c3f43;margin:0 0 14px}
.prose ul,.prose ol{margin:0 0 16px 22px;line-height:1.7}
.prose li{font-size:14.5px;color:#3c3f43;margin:6px 0}
.prose a{color:var(--blue);font-weight:600;text-decoration:underline;text-underline-offset:3px}
.prose img{border-radius:6px;margin:20px 0;box-shadow:0 16px 40px -20px rgba(0,0,0,.25)}
.prose table{width:100%;border-collapse:collapse;margin:20px 0;font-size:13.5px}
.prose th{background:#f5f5f7;text-align:left;padding:10px 12px;font-weight:800;border:1px solid var(--hair)}
.prose td{padding:10px 12px;border:1px solid var(--hair);line-height:1.6;vertical-align:top}
.prose blockquote{border-left:3px solid var(--blue);padding:4px 0 4px 18px;margin:18px 0;color:var(--muted);font-style:italic}
.prose strong{font-weight:800;color:var(--ink)}

.sticky-cta{display:none}
@media(max-width:900px){.links{display:none}.burger{display:block}
.steps{grid-template-columns:1fr 1fr;gap:34px 22px}.cards{grid-template-columns:1fr 1fr}
.video-grid{grid-template-columns:1fr 1fr}.svc{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr 1fr}.foot-brand{grid-column:1/-1}}
@media(max-width:520px){.steps{grid-template-columns:1fr}.cards{grid-template-columns:1fr}
.video-grid{grid-template-columns:1fr}.foot-grid{grid-template-columns:1fr}
.sticky-cta{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:60;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.9);backdrop-filter:blur(16px);border-top:1px solid var(--hair)}
.sticky-cta a{flex:1;text-align:center;padding:13px 8px;font-size:13px;font-weight:700;border-radius:999px}
.sticky-cta .pri{background:var(--ink);color:#fff}.sticky-cta .sec{border:1px solid rgba(0,0,0,.2);color:var(--ink)}
body{padding-bottom:72px}}