:root{--bg:#F4FAFC;--white:#FFFFFF;--soft:#E7F3F6;--title:#0E3A46;--text:#24505A;--muted:#4A7380;--aux:#7A9AA4;--sea:#1A7F8F;--bright:#2BB3C4;--deep:#0F5B68;--pale:#D7EEF2;--line:rgba(26,127,143,.16);--shadow:0 14px 34px rgba(14,58,70,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}a{color:var(--deep);text-decoration:none}a:hover{color:var(--sea)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(43,179,196,.35);outline-offset:2px}img{max-width:100%;display:block;object-fit:contain;object-position:center}.wrap{width:min(1180px,calc(100% - 32px));margin:0 auto}.site-top{position:fixed;z-index:60;top:0;left:0;right:0}.mist-line{height:20px;background:var(--deep);color:#fff;font-size:12px}.mist-inner{height:20px;display:flex;justify-content:space-between;align-items:center}.text-button{appearance:none;border:0;background:transparent;color:#fff;min-height:20px;padding:0 6px;cursor:pointer}.dock-bar{height:62px;background:#fff;border-bottom:1px solid var(--line)}.dock-inner{height:62px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.brand{justify-self:start;display:flex;align-items:center;min-height:44px}.brand img{height:34px;max-width:190px}.drawer-button,.app-link,.btn{min-height:44px;border-radius:10px;padding:10px 18px;border:1px solid var(--line);font:inherit;font-weight:700;display:inline-flex;align-items:center;justify-content:center}.drawer-button{background:var(--pale);color:var(--deep);cursor:pointer}.app-link{justify-self:end;background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff}.app-link:hover,.btn.primary:hover{color:#fff;filter:brightness(.96)}.shell-tabs{height:42px;background:var(--pale);border-bottom:1px solid var(--line)}.tabs-inner{height:42px;display:flex;gap:8px;align-items:center}.tabs-inner a{padding:5px 12px;border-radius:8px;font-size:14px}.tabs-inner a.is-current{background:var(--sea);color:#fff}.site-main{padding-top:124px;min-height:70vh}.section{padding:56px 0}.section.tight{padding:34px 0}.hero{padding-top:36px}.hero-media,.media-slot{background:linear-gradient(180deg,#fff,var(--soft));border:1px solid var(--line);border-radius:18px;display:flex;align-items:center;justify-content:center;overflow:hidden}.hero-media{min-height:220px;max-height:300px}.hero-media img{width:100%;max-height:300px}.media-slot{min-height:180px}.media-slot img{width:100%;height:220px}.eyebrow{color:var(--sea);font-weight:800;letter-spacing:.08em;margin:18px 0 6px}.hero h1,.page-head h1{color:var(--title);font-size:clamp(28px,4vw,32px);line-height:1.25;margin:0 0 14px}.lead{font-size:17px;max-width:820px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.btn.primary{background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff}.btn.secondary{background:#fff;color:var(--deep)}.steps{display:grid;gap:14px}.step-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.step-card,.card,.note-card,.faq-item{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:16px}.step-card{padding:20px}.step-card h3,.card h3,.note-card h3{color:var(--title);margin:0 0 8px}.step-card .chip{display:inline-block;border-radius:8px;padding:3px 8px;color:#fff;background:var(--bright);font-size:12px;margin-bottom:10px}.step-row.lower .chip{background:var(--deep)}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.card{overflow:hidden}.card-body{padding:20px}.card p{margin:0 0 12px}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:24px}.section-head h2{font-size:26px;color:var(--title);margin:0}.section-head p{max-width:680px;margin:0}.number-list{counter-reset:item;display:grid;gap:12px}.number-list article{counter-increment:item;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 18px 18px 66px;position:relative}.number-list article:before{content:counter(item,decimal-leading-zero);position:absolute;left:18px;top:18px;color:var(--sea);font-weight:900;font-size:20px}.split{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:center}.soft-panel{background:var(--soft);border-radius:18px;padding:26px;border:1px solid var(--line)}.page-head{padding:42px 0 20px}.page-head .crumb{font-size:13px;color:var(--muted);margin-bottom:8px}.content-shell{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:26px;padding-bottom:60px}.prose{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:var(--shadow)}.prose h2{color:var(--title);font-size:22px;margin-top:30px}.prose h2:first-child{margin-top:0}.prose h3{color:var(--title);font-size:18px}.prose p{margin:0 0 16px}.prose ul{padding-left:22px}.side-nav{align-self:start;position:sticky;top:146px;background:var(--pale);border:1px solid var(--line);border-radius:16px;padding:18px}.side-nav h3{color:var(--title);margin:0 0 10px}.side-nav a{display:block;padding:8px 0;border-bottom:1px dashed var(--line)}.side-nav a:last-child{border:0}.faq-list{display:grid;gap:14px}.faq-item{padding:22px}.faq-item h2{font-size:18px;margin:0 0 8px;color:var(--title)}.site-footer{background:var(--title);color:#D4E8EC;padding:48px 0 70px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:28px}.footer-grid h2,.footer-grid h3{color:#fff}.footer-grid a{display:block;color:#D4E8EC;padding:4px 0}.footer-brand img{height:32px;filter:brightness(0) invert(1);margin-bottom:10px}.footer-note{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:20px;font-size:14px}.tide-drawer{position:fixed;z-index:90;right:0;top:0;bottom:0;width:min(410px,86vw);background:var(--bg);box-shadow:-20px 0 50px rgba(14,58,70,.18);transform:translateX(105%);visibility:hidden;pointer-events:none;transition:.25s ease;overflow:auto;padding:18px}.tide-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.drawer-brand{display:flex;gap:10px;align-items:center;color:var(--title)}.drawer-brand img{height:30px;max-width:150px}.icon-button{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:25px;color:var(--deep);cursor:pointer}.drawer-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px}.drawer-cards section{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px}.drawer-cards h3{margin:0 0 8px;color:var(--title)}.drawer-cards a{display:block;padding:9px 0;border-top:1px dashed var(--line)}.drawer-cards b,.drawer-cards span{display:block}.drawer-cards span{font-size:12px;color:var(--muted);line-height:1.55;margin-top:3px}.search-layer{position:fixed;z-index:88;top:82px;left:0;right:0;visibility:hidden;pointer-events:none}.search-layer.is-open{visibility:visible;pointer-events:auto}.search-card{width:min(760px,calc(100% - 32px));margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:0 0 18px 18px;box-shadow:var(--shadow);padding:20px}.search-head{display:flex;justify-content:space-between;align-items:center;color:var(--title)}.search-look input{width:100%;height:48px;border:1px solid var(--line);border-radius:10px;padding:0 14px;font:inherit;margin:16px 0;background:var(--bg);color:var(--text)}.quick-links{display:flex;gap:10px;flex-wrap:wrap}.quick-links a{background:var(--pale);padding:8px 12px;border-radius:8px}.page-mask{position:fixed;z-index:80;inset:0;background:rgba(14,58,70,.35);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.page-mask.is-open{opacity:1;visibility:visible;pointer-events:auto}.overlay-open{overflow:hidden}.mobile-bottom{display:none}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.list-cards{display:grid;gap:14px}.note-card{padding:20px}.tagline{color:var(--sea);font-weight:700}.app-showcase{display:grid;grid-template-columns:.8fr 1.2fr;gap:26px;align-items:center}.app-visual{background:#fff;border:1px solid var(--line);border-radius:18px;min-height:260px;display:flex;justify-content:center;padding:18px}.app-visual img{max-height:420px}.icon-row{display:flex;align-items:center;gap:12px}.icon-row img{width:64px;height:64px}
@media(max-width:900px){.grid-4,.step-row{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:1fr 1fr}.split,.app-showcase,.content-shell{grid-template-columns:1fr}.side-nav{position:static}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:1/-1}.drawer-cards{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.shell-tabs{display:none}.site-main{padding-top:82px;padding-bottom:56px}.dock-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:6px}.brand img{max-width:120px;height:30px}.drawer-button,.app-link{padding:8px 10px;min-width:44px;font-size:13px}.section{padding:38px 0}.hero{padding-top:24px}.hero-media{min-height:170px}.step-row,.grid-4,.grid-3,.grid-2,.drawer-cards{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:8px}.prose{padding:20px}.footer-grid{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:90px}.mobile-bottom{position:fixed;z-index:70;left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(5,1fr)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:13px;min-height:50px}.mobile-bottom a.is-current{background:var(--sea);color:#fff}.search-layer{top:82px}.search-card{background:var(--pale);border-radius:0 0 16px 16px}.tide-drawer{width:86vw}.footer-brand{grid-column:1/-1}.content-shell{padding-bottom:30px}}