:root{
  --bg:#F4FAFC;--surface:#FFFFFF;--soft:#E7F3F6;--title:#0E3A46;--text:#24505A;--muted:#4A7380;--aux:#7A9AA4;
  --sea:#1A7F8F;--bright:#2BB3C4;--deep:#0F5B68;--pale:#D7EEF2;--border:rgba(26,127,143,.16);--shadow:0 14px 34px rgba(14,58,70,.08);
  --max:1200px;--harbor:58px;--dock:48px
}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}body.modal-open{overflow:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}button,input{font:inherit}.site-header{position:fixed;top:0;left:0;right:0;z-index:50}.harbor-bar{height:var(--harbor);display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 max(16px,calc((100vw - var(--max))/2));background:rgba(215,238,242,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.circle-control{width:44px;height:44px;border-radius:50%;border:1px solid var(--border);background:#fff;color:var(--deep);display:grid;place-items:center;cursor:pointer;transition:.2s}.circle-control:hover,.circle-control:focus-visible{outline:3px solid rgba(43,179,196,.18);border-color:var(--sea)}.brand-center{display:flex;align-items:center;justify-content:center;min-width:110px;height:44px}.header-logo{height:34px;width:auto;object-fit:contain}.logo-text{font-weight:800;color:var(--title);letter-spacing:.08em}.harbor-actions{justify-self:end;display:flex;gap:8px;align-items:center}.app-pill,.btn-primary,.btn-secondary{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 20px;border-radius:999px;font-weight:700}.app-pill,.btn-primary{color:#fff;background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%)}.app-pill:hover,.app-pill:focus-visible,.btn-primary:hover,.btn-primary:focus-visible{filter:brightness(.96);outline:3px solid rgba(43,179,196,.18)}.btn-secondary{background:#fff;color:var(--deep);border:1px solid var(--border)}.btn-secondary:hover,.btn-secondary:focus-visible{border-color:var(--sea);outline:3px solid rgba(43,179,196,.18)}.dock-nav{height:var(--dock);background:rgba(255,255,255,.97);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:center;gap:34px}.dock-nav a{height:100%;display:flex;align-items:center;position:relative;color:var(--muted);font-weight:650}.dock-nav a:hover,.dock-nav a:focus-visible{color:var(--deep);outline:none}.dock-nav a.is-current{color:var(--sea)}.dock-nav a.is-current:after{content:"";position:absolute;left:8px;right:8px;bottom:0;height:3px;border-radius:3px;background:var(--sea)}.site-main{padding-top:calc(var(--harbor) + var(--dock));min-height:60vh}.container{width:min(var(--max),calc(100% - 32px));margin:0 auto}.section{padding:64px 0}.section.compact{padding:44px 0}.eyebrow{display:inline-block;color:var(--sea);font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.page-hero{padding:60px 0 32px}.page-hero .hero-inner{background:var(--soft);border:1px solid var(--border);border-radius:24px;padding:clamp(28px,5vw,54px);box-shadow:var(--shadow)}h1,h2,h3{color:var(--title);line-height:1.3;margin-top:0}h1{font-size:clamp(28px,4vw,32px);margin-bottom:18px}h2{font-size:clamp(22px,3vw,26px);margin-bottom:14px}h3{font-size:19px;margin-bottom:10px}p{margin:0 0 16px}.lead{font-size:17px;max-width:820px}.muted{color:var(--muted)}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.media-slot{width:100%;aspect-ratio:16/7;border-radius:18px;background:linear-gradient(135deg,var(--pale),var(--soft));border:1px solid var(--border);position:relative;overflow:hidden}.media-slot:after{content:"";position:absolute;inset:22% 8%;border-radius:50%;background:radial-gradient(circle at 30% 50%,rgba(43,179,196,.2),transparent 44%),linear-gradient(8deg,transparent 44%,rgba(26,127,143,.08) 45% 54%,transparent 55%)}.hero-media{margin-top:28px;max-height:340px;object-fit:cover;border-radius:18px;width:100%}.home-hero{padding:48px 0 36px}.home-hero .cover{background:#fff;border:1px solid var(--border);border-radius:26px;padding:clamp(26px,5vw,56px);box-shadow:var(--shadow)}.home-hero h1{max-width:760px;font-size:clamp(30px,5vw,44px);margin:10px 0 18px}.home-hero .cover p{max-width:820px}.grid-2,.grid-3,.grid-4,.grid-6{display:grid;gap:20px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-6{grid-template-columns:repeat(3,1fr)}.card,.article-card,.info-card{background:#fff;border:1px solid var(--border);border-radius:18px;padding:24px;box-shadow:var(--shadow)}.card img,.card .media-slot{border-radius:14px;margin-bottom:18px;aspect-ratio:16/9;object-fit:cover}.card p:last-child,.article-card p:last-child{margin-bottom:0}.card-link{display:inline-flex;align-items:center;min-height:44px;color:var(--sea);font-weight:750}.card-link:hover,.card-link:focus-visible{color:var(--deep);outline:none;text-decoration:underline}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}.section-head p{max-width:640px;margin:0}.tone-soft{background:var(--soft);border-block:1px solid var(--border)}.tide-list{display:grid;gap:14px;margin-top:20px}.tide-item{display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:start;padding:18px 0;border-bottom:1px solid var(--border)}.tide-item:last-child{border-bottom:0}.tide-num{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--pale);color:var(--deep);font-weight:800}.tide-item h3{margin:0 0 6px}.tide-item p{margin:0}.feature-split{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:center}.feature-split img,.feature-split .media-slot{border-radius:18px;aspect-ratio:16/11;object-fit:cover}.route-list{display:grid;gap:14px}.route-item{background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px}.route-item strong{display:block;color:var(--title);margin-bottom:4px}.prose{max-width:860px}.prose h2{margin-top:38px}.prose h3{margin-top:26px}.prose ul,.prose ol{padding-left:1.25em}.prose li{margin:8px 0}.index-row{display:grid;grid-template-columns:170px 1fr;gap:24px;padding:24px 0;border-bottom:1px solid var(--border)}.index-row:last-child{border-bottom:0}.index-row .tag{color:var(--sea);font-weight:800}.story-card{padding:0;overflow:hidden}.story-card .story-body{padding:22px}.story-card img,.story-card .media-slot{border-radius:0;aspect-ratio:16/9;margin:0}.window-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:20px}.window-main,.window-side{display:grid;gap:20px}.handbook-chapter{display:grid;grid-template-columns:140px 1fr;gap:24px;padding:28px 0;border-bottom:1px solid var(--border)}.handbook-chapter:last-child{border-bottom:0}.chapter-mark{font-weight:850;color:var(--sea);letter-spacing:.08em}.faq-list{display:grid;gap:16px}.faq-item{background:#fff;border:1px solid var(--border);border-radius:16px;padding:22px}.faq-item h2{font-size:19px;margin-bottom:10px}.notice{background:var(--pale);color:var(--deep);border-radius:16px;padding:18px 20px;border:1px solid var(--border)}.site-footer{background:#0E3A46;color:#D4E8EC;margin-top:24px}.footer-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto;padding:54px 0 30px}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:34px}.footer-logo-link{display:flex;align-items:center;min-height:44px}.footer-logo{max-height:34px;width:auto}.footer-brand strong{display:block;color:#fff;font-size:18px}.footer-brand span{font-size:12px;letter-spacing:.16em}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.14)}.footer-grid h2{color:#fff;font-size:16px;margin-bottom:10px}.footer-grid a{display:block;min-height:36px;color:#D4E8EC}.footer-grid a:hover,.footer-grid a:focus-visible{color:#fff;text-decoration:underline;outline:none}.footer-note{margin-top:24px;color:#D4E8EC}.copyright{margin:8px 0 0;color:#9FC2CA;font-size:14px}.overlay{position:fixed;inset:0;background:rgba(14,58,70,.42);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.17s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.modal-card{position:fixed;left:50%;top:50%;transform:translate(-50%,-48%);z-index:90;width:min(760px,92vw);max-height:min(84vh,760px);overflow:auto;background:#fff;border:1px solid var(--border);border-radius:22px;box-shadow:0 24px 70px rgba(14,58,70,.25);padding:24px;opacity:0;visibility:hidden;pointer-events:none;transition:.17s}.modal-card.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,-50%)}.modal-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:18px}.close-btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--border);background:#fff;color:var(--title);font-size:28px;line-height:1;cursor:pointer}.close-btn:hover,.close-btn:focus-visible{outline:3px solid rgba(43,179,196,.18)}.atlas-brand{display:flex;align-items:center;gap:12px}.atlas-logo{height:30px;width:auto}.atlas-brand strong{display:block;color:var(--title)}.atlas-brand span{display:block;color:var(--muted);font-size:11px;letter-spacing:.13em}.atlas-groups{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.atlas-groups h2{font-size:15px;color:var(--sea);margin-bottom:8px}.atlas-groups a{display:block;padding:10px 0;border-bottom:1px solid var(--border)}.atlas-groups a:last-child{border-bottom:0}.atlas-groups strong{display:block;color:var(--title);font-size:15px}.atlas-groups span{display:block;color:var(--muted);font-size:13px;line-height:1.55}.atlas-groups a:hover strong,.atlas-groups a:focus-visible strong{color:var(--sea)}.atlas-groups a:focus-visible{outline:2px solid var(--bright);outline-offset:3px;border-radius:8px}.search-panel{width:min(620px,92vw)}.search-panel h2{margin:3px 0 0;font-size:22px}.search-look{min-height:54px;border:1px solid var(--border);background:var(--soft);border-radius:14px;display:flex;align-items:center;gap:10px;padding:0 16px;color:var(--muted)}.preset-links{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}.preset-links a{min-height:44px;display:grid;place-items:center;background:#fff;border:1px solid var(--border);border-radius:999px;color:var(--deep);font-weight:700}.preset-links a:hover,.preset-links a:focus-visible{border-color:var(--sea);outline:3px solid rgba(43,179,196,.16)}.mobile-bottom{display:none}
@media(max-width:900px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-6{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}.feature-split,.window-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(2,1fr)}.dock-nav{gap:18px}}
@media(max-width:720px){:root{--dock:0px}.dock-nav{display:none}.site-main{padding-top:var(--harbor);padding-bottom:calc(66px + env(safe-area-inset-bottom))}.harbor-bar{grid-template-columns:52px 1fr 96px;padding:0 10px}.search-control{display:none}.app-pill{padding:0 14px;font-size:14px}.brand-center{min-width:0}.header-logo{max-width:150px;height:30px}.section{padding:48px 0}.page-hero{padding:34px 0 22px}.home-hero{padding:30px 0 24px}.grid-2,.grid-3,.grid-4,.grid-6{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:8px}.index-row{grid-template-columns:1fr;gap:6px}.handbook-chapter{grid-template-columns:1fr;gap:8px}.atlas-groups{grid-template-columns:1fr}.modal-card{padding:18px;max-height:86vh}.preset-links{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:60;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:rgba(255,255,255,.97);border-top:1px solid var(--border);box-shadow:0 -8px 24px rgba(14,58,70,.07)}.mobile-bottom a{min-width:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:1px;font-size:11px;color:var(--muted)}.mobile-bottom a span{font-size:16px;line-height:1}.mobile-bottom a.is-current{color:var(--sea);font-weight:800}.overlay{z-index:80}.modal-card{z-index:90}.site-footer{margin-bottom:0}.footer-inner{padding-bottom:40px}}
@media(max-width:420px){.harbor-bar{grid-template-columns:48px minmax(0,1fr) 88px}.app-pill{padding:0 12px}.logo-text{font-size:15px;letter-spacing:.02em}.footer-grid{grid-template-columns:1fr}.preset-links{grid-template-columns:1fr 1fr}.card,.article-card,.info-card{padding:20px}}