:root{--bg:#F4FAFC;--surface:#fff;--sub:#E7F3F6;--title:#0E3A46;--text:#24505A;--muted:#4A7380;--aux:#7A9AA4;--brand:#1A7F8F;--bright:#2BB3C4;--deep:#0F5B68;--pale:#D7EEF2;--line:rgba(26,127,143,.16);--shadow:0 14px 34px rgba(14,58,70,.08);--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.75 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;overflow-x:hidden}body.locked{overflow:hidden}a{color:var(--deep);text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(43,179,196,.45);outline-offset:2px}.wrap{width:min(var(--max),calc(100% - 32px));margin:0 auto}.site-head{position:fixed;z-index:40;top:0;left:0;right:0}.mist-line{height:20px;background:var(--deep);color:#fff;font-size:12px}.mist-inner{height:20px;display:flex;align-items:center;justify-content:space-between}.text-btn{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-logo{display:block;max-width:190px;height:36px;object-fit:contain}.brand-fallback{font-size:22px;font-weight:800;color:var(--title)}.dock-menu,.app-link{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:10px;padding:0 18px;background:#fff;color:var(--deep);font-weight:700}.app-link{justify-self:end;background:linear-gradient(135deg,var(--bright) 0%,var(--brand) 55%,var(--deep) 100%);color:#fff;border:0}.shell-tabs{height:42px;background:var(--pale);border-bottom:1px solid var(--line)}.shell-tabs-inner{height:42px;display:flex;align-items:center;gap:8px}.shell-tabs a{padding:6px 12px;border-radius:8px;font-size:14px;color:var(--deep)}.shell-tabs a.active{background:var(--brand);color:#fff;text-decoration:none}.site-main{padding-top:144px}.hero,.page-hero{padding:30px 0 16px}.hero-media,.media-slot{background:linear-gradient(180deg,#fff,var(--sub));border:1px solid var(--line);border-radius:18px;min-height:160px;display:flex;align-items:center;justify-content:center;overflow:hidden}.hero-media img{width:100%;max-height:300px;object-fit:contain}.media-slot img,.card-media img{width:100%;height:100%;object-fit:contain;object-position:center}.page-hero h1,.hero h1{margin:16px 0 8px;color:var(--title);font-size:clamp(28px,4vw,32px);line-height:1.28}.eyebrow{color:var(--brand);font-size:13px;font-weight:800;letter-spacing:.08em}.lead{max-width:820px;color:var(--muted);font-size:17px}.actions{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}.btn{min-height:44px;padding:10px 18px;border-radius:10px;display:inline-flex;align-items:center;font-weight:700;border:1px solid var(--line)}.btn.primary{background:linear-gradient(135deg,var(--bright) 0%,var(--brand) 55%,var(--deep) 100%);color:#fff;border:0}.btn.secondary{background:#fff;color:var(--deep)}.section{padding:24px 0}.section-head{display:flex;gap:16px;align-items:end;justify-content:space-between;margin-bottom:16px}.section h2,.content-card h2{margin:0;color:var(--title);font-size:24px;line-height:1.35}.section-head p{margin:0;color:var(--aux)}.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.step-card,.pebble,.content-card,.note-card,.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.step-card{padding:18px;position:relative;overflow:hidden}.step-card::before{content:"";display:block;width:44px;height:6px;border-radius:3px;background:var(--bright);margin-bottom:14px}.step-card:nth-child(even)::before{background:var(--deep)}.step-card h3,.pebble h3,.note-card h3{margin:0 0 7px;color:var(--title)}.step-card p,.pebble p,.note-card p{margin:0;color:var(--muted)}.numbered{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);gap:18px}.number-list{display:grid;gap:10px}.number-list a{background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 15px;display:flex;gap:12px;align-items:center}.num{font-weight:900;color:var(--brand);font-size:20px}.pebble-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.pebble{padding:16px}.card-media{height:210px;background:var(--sub);border-radius:12px;margin-bottom:14px;display:flex;align-items:center;justify-content:center;overflow:hidden}.feature-split{display:grid;grid-template-columns:minmax(280px,.9fr) minmax(0,1.1fr);gap:20px;align-items:center}.content-card{padding:22px}.content-card p{margin:10px 0}.content-card ul{padding-left:20px}.mini-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.mini-card{background:var(--sub);color:var(--deep);padding:16px;border-radius:14px;border:1px solid var(--line)}.album-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.album-list article{background:#fff;border:1px solid var(--line);padding:18px;border-radius:14px}.gallery-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.gallery-strip article{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px}.prose{max-width:900px}.prose section{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;margin:16px 0;box-shadow:var(--shadow)}.prose h2{color:var(--title);font-size:22px;margin:0 0 10px}.prose p{margin:10px 0}.index-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.index-list article{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.index-list h2,.index-list h3{color:var(--title);margin-top:0}.terms{counter-reset:item}.terms section{counter-increment:item}.terms h2::before{content:counter(item,decimal-leading-zero) " · ";color:var(--brand)}.faq-list{display:grid;gap:14px}.faq-item{padding:20px}.faq-item h2{font-size:19px;color:var(--title);margin:0 0 8px}.app-showcase{display:grid;grid-template-columns:minmax(220px,.65fr) minmax(0,1.35fr);gap:24px;align-items:center}.app-visual{background:#fff;border:1px solid var(--line);border-radius:18px;min-height:320px;display:flex;align-items:center;justify-content:center;padding:18px}.app-visual img{max-width:100%;max-height:420px;object-fit:contain}.app-icon{width:64px;height:64px;object-fit:contain;border-radius:14px}.notice{background:var(--pale);color:var(--deep);border:1px solid var(--line);border-radius:14px;padding:16px}.site-footer{background:var(--title);color:#D4E8EC;margin-top:48px;padding:34px 0 calc(24px + env(safe-area-inset-bottom))}.footer-brand{display:flex;justify-content:space-between;gap:24px;align-items:center;border-bottom:1px solid rgba(255,255,255,.12);padding-bottom:20px}.footer-identity{display:flex;gap:12px;align-items:center}.footer-identity div{display:flex;flex-direction:column}.footer-logo{height:32px;max-width:180px;object-fit:contain;filter:brightness(0) invert(1)}.footer-brand p{max-width:670px;margin:0;color:#D4E8EC}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:24px 0}.footer-grid h2{font-size:15px;margin:0 0 10px;color:#fff}.footer-grid a{display:block;color:#D4E8EC;margin:5px 0}.footer-bottom{font-size:13px;color:#a9c8cf}.overlay{position:fixed;inset:0;background:rgba(7,35,42,.38);z-index:70;opacity:0;visibility:hidden;pointer-events:none;transition:.22s}.overlay.open{opacity:1;visibility:visible;pointer-events:auto}.tide-drawer{position:fixed;right:0;top:0;bottom:0;width:min(410px,86vw);background:var(--bg);z-index:80;transform:translateX(100%);visibility:hidden;pointer-events:none;transition:transform .26s,visibility .26s;overflow-y:auto;padding-bottom:30px}.tide-drawer.open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:13px 16px;z-index:1}.drawer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--title)}.drawer-brand img{height:30px;max-width:150px;object-fit:contain}.icon-close{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:26px;color:var(--deep);cursor:pointer}.drawer-groups{padding:14px;display:grid;gap:14px}.drawer-groups section{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;box-shadow:var(--shadow)}.drawer-groups h2{font-size:16px;color:var(--brand);margin:0 0 8px}.drawer-groups a{display:block;padding:10px;border-radius:10px}.drawer-groups a:hover{background:var(--sub);text-decoration:none}.drawer-groups b{display:block;color:var(--title)}.drawer-groups span{display:block;color:var(--muted);font-size:13px;line-height:1.55}.search-layer{position:fixed;top:82px;left:0;right:0;z-index:85;visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.search-layer.open{visibility:visible;pointer-events:auto;opacity:1}.search-card{width:min(760px,calc(100% - 32px));margin:14px auto 0;background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between}.search-card label{display:block;margin:10px 0 6px;color:var(--deep)}.search-card input{width:100%;min-height:48px;border:1px solid var(--line);border-radius:10px;padding:0 13px;font:inherit;color:var(--text)}.preset-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.preset-links a{background:var(--pale);color:var(--deep);padding:8px 12px;border-radius:8px}.mobile-nav{display:none}.muted{color:var(--muted)}@media(max-width:800px){.shell-tabs{display:none}.site-main{padding-top:92px}.dock-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:6px}.brand-logo{max-width:128px;height:30px}.dock-menu,.app-link{padding:0 10px;font-size:14px}.step-grid,.mini-grid{grid-template-columns:repeat(2,1fr)}.numbered,.feature-split,.app-showcase{grid-template-columns:1fr}.pebble-grid,.index-list{grid-template-columns:1fr}.album-list{grid-template-columns:1fr}.gallery-strip{grid-template-columns:repeat(2,1fr)}.footer-brand{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:repeat(2,1fr)}.mobile-nav{position:fixed;z-index:60;display:grid;grid-template-columns:repeat(5,1fr);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)}.mobile-nav a{display:flex;align-items:center;justify-content:center;min-width:0;color:var(--deep);font-size:13px}.mobile-nav a.active{background:var(--brand);color:#fff}.site-footer{padding-bottom:calc(74px + env(safe-area-inset-bottom))}.search-layer{top:82px}.search-card{background:var(--pale)}.hero,.page-hero{padding-top:22px}}@media(max-width:480px){.step-grid,.mini-grid,.gallery-strip{grid-template-columns:1fr}.dock-menu{font-size:13px}.app-link{font-size:13px}.wrap{width:min(var(--max),calc(100% - 32px))}.section{padding:20px 0}}