*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F4FAFC;color:#24505A;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;overflow-x:hidden}a{color:#0F5B68;text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(43,179,196,.35);outline-offset:3px}img{display:block;max-width:100%;height:auto}.site-header{position:fixed;inset:0 0 auto;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid rgba(26,127,143,.16);backdrop-filter:saturate(140%) blur(10px)}.topbar{height:72px;max-width:1200px;margin:auto;padding:0 20px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;min-width:150px}.brand-logo{height:34px;width:auto;object-fit:contain}.brand-text{font-size:22px;font-weight:800;color:#0E3A46;white-space:nowrap}.desktop-nav{display:flex;align-items:center;justify-content:center;gap:24px;flex:1;min-width:0}.desktop-nav a{display:flex;align-items:center;height:72px;color:#24505A;font-weight:650;white-space:nowrap;border-bottom:3px solid transparent}.desktop-nav a.active{color:#1A7F8F;border-bottom-color:#1A7F8F}.header-actions{display:flex;align-items:center;gap:8px}.icon-button,.app-link,.drawer-head button,.search-head button{min-height:44px;border:1px solid rgba(26,127,143,.18);border-radius:10px;padding:0 14px;background:#fff;color:#0F5B68;font:inherit;font-weight:700;cursor:pointer}.app-link{display:inline-flex;align-items:center;background:#D7EEF2}.site-main{padding-top:72px;min-height:70vh}.context-nav{max-width:1200px;margin:0 auto;padding:24px 20px 0;display:flex;gap:8px;flex-wrap:wrap;color:#7A9AA4;font-size:14px}.context-nav a{color:#4A7380}.page-shell{max-width:1200px;margin:auto;padding:34px 20px 72px}.hero,.inner-hero{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);gap:36px;align-items:center;padding:42px 0}.hero.reverse,.split.reverse{direction:rtl}.hero.reverse>* ,.split.reverse>*{direction:ltr}.eyebrow{color:#1A7F8F;font-weight:800;letter-spacing:.12em;font-size:13px}.hero h1,.inner-hero h1{font-size:clamp(28px,4vw,34px);line-height:1.25;color:#0E3A46;margin:.35em 0 .65em}.lead{font-size:18px;color:#4A7380;max-width:760px}.hero-media,.feature-media,.image-panel{background:#E7F3F6;border-radius:18px;padding:12px}.hero-media:empty,.feature-media:empty,.image-panel:empty{display:none}.content-image{width:100%;height:auto;max-width:100%;object-fit:contain;object-position:center;border-radius:12px}.hero-media img{max-height:420px;margin:auto}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:10px;font-weight:800}.btn.primary{color:#fff;background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%)}.btn.secondary{color:#0F5B68;background:#fff;border:1px solid rgba(26,127,143,.25)}.section{padding:58px 0;border-top:1px solid rgba(26,127,143,.12)}.section.alt{background:#E7F3F6;margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw);padding-left:max(20px,calc((100vw - 1200px)/2 + 20px));padding-right:max(20px,calc((100vw - 1200px)/2 + 20px))}.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}.section-head h2,.article-section h2{font-size:clamp(24px,3vw,30px);line-height:1.3;color:#0E3A46;margin:0}.section-head p{max-width:650px;margin:0;color:#4A7380}.mag-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:18px}.stack{display:grid;gap:18px}.feature-card,.mini-card,.plain-card,.tool-card,.faq-item{background:#fff;border:1px solid rgba(26,127,143,.16);border-radius:16px;padding:24px;box-shadow:0 14px 34px rgba(14,58,70,.05)}.feature-card h3,.mini-card h3,.plain-card h3,.tool-card h3{color:#0E3A46;margin:.35em 0}.feature-card p,.mini-card p,.plain-card p{margin-bottom:0}.split{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}.split+.split{margin-top:36px}.link-list{display:grid;gap:10px}.link-list a{background:#fff;border-bottom:1px solid rgba(26,127,143,.14);padding:14px 4px;font-weight:750}.index-list{counter-reset:item;display:grid;gap:16px}.index-list article{display:grid;grid-template-columns:52px 1fr;gap:16px;padding:18px 0;border-bottom:1px solid rgba(26,127,143,.16)}.index-list article:before{counter-increment:item;content:counter(item,decimal-leading-zero);font-size:24px;font-weight:800;color:#2BB3C4}.article-section{max-width:860px;margin:0 auto;padding:28px 0}.article-section p{margin:0 0 1.2em}.article-section ul,.article-section ol{padding-left:1.25em}.article-section li{margin:.55em 0}.wide-article{max-width:980px}.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.three-col{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.four-col{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.timeline{border-left:2px solid #D7EEF2;padding-left:28px}.timeline section{position:relative;padding:0 0 30px}.timeline section:before{content:"";position:absolute;left:-35px;top:.45em;width:12px;height:12px;border-radius:50%;background:#1A7F8F;border:3px solid #F4FAFC}.step-list{display:grid;gap:20px;counter-reset:steps}.step-list article{position:relative;padding:26px 26px 26px 76px;background:#fff;border:1px solid rgba(26,127,143,.16);border-radius:16px}.step-list article:before{counter-increment:steps;content:counter(steps);position:absolute;left:24px;top:24px;width:34px;height:34px;border-radius:50%;background:#D7EEF2;color:#0F5B68;display:grid;place-items:center;font-weight:900}.notice{background:#D7EEF2;color:#0E3A46;border-radius:14px;padding:22px}.checklist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.checklist li{list-style:none;background:#fff;border:1px solid rgba(26,127,143,.14);border-radius:12px;padding:16px}.faq-list{display:grid;gap:14px}.faq-item h2{font-size:19px;margin:0 0 10px;color:#0E3A46}.gallery-flow{display:grid;gap:32px}.gallery-entry{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.8fr);gap:28px;align-items:center}.gallery-entry:nth-child(even){grid-template-columns:minmax(260px,.8fr) minmax(0,1fr)}.gallery-entry:nth-child(even) .gallery-copy{order:2}.app-showcase{display:grid;grid-template-columns:minmax(260px,.7fr) minmax(0,1.3fr);gap:36px;align-items:center}.app-showcase .content-image{max-height:440px;width:auto;margin:auto}.icon-sample{width:72px!important;height:72px!important;object-fit:contain}.site-footer{background:#0E3A46;color:#D4E8EC;padding:56px 20px 86px}.footer-inner{max-width:1200px;margin:auto}.footer-brand{display:grid;grid-template-columns:minmax(220px,.5fr) minmax(0,1fr);gap:30px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.13)}.footer-brand-link{display:flex;align-items:center;gap:12px;color:#fff}.footer-brand-link .brand-logo{filter:none}.footer-brand-link span{display:flex;flex-direction:column}.footer-brand-link em{font-style:normal;font-size:12px;letter-spacing:.16em;color:#D4E8EC}.footer-brand p{max-width:760px;margin:0}.footer-groups{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:24px;padding:32px 0}.footer-groups section{display:flex;flex-direction:column;gap:8px}.footer-groups h2{font-size:15px;color:#fff;margin:0 0 6px}.footer-groups a{color:#D4E8EC;font-size:14px}.footer-bottom{padding-top:22px;border-top:1px solid rgba(255,255,255,.13);font-size:14px;color:#b8d6dc}.overlay{position:fixed;inset:0;background:rgba(7,37,43,.45);z-index:70;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.open{opacity:1;visibility:visible;pointer-events:auto}.drawer{position:fixed;top:0;right:0;bottom:0;width:min(440px,90vw);background:#fff;z-index:80;transform:translateX(102%);visibility:hidden;pointer-events:none;transition:.25s;overflow:auto;box-shadow:-18px 0 42px rgba(14,58,70,.12)}.drawer.open{transform:none;visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;background:#fff;border-bottom:1px solid rgba(26,127,143,.14);display:flex;align-items:center;justify-content:space-between;padding:16px 18px;z-index:2}.drawer-brand{display:flex;align-items:center;gap:10px;font-weight:900}.drawer-brand .brand-logo{height:30px}.drawer-groups{padding:10px 18px 32px}.drawer-groups section{padding:18px 0;border-bottom:1px solid rgba(26,127,143,.12)}.drawer-groups h2{font-size:17px;color:#0E3A46;margin:0 0 8px}.drawer-groups a{display:block;padding:10px 0}.drawer-groups strong{display:block;color:#0F5B68}.drawer-groups span{display:block;color:#7A9AA4;font-size:13px;line-height:1.5}.search-layer{position:fixed;top:72px;left:0;right:0;z-index:79;background:#fff;box-shadow:0 18px 42px rgba(14,58,70,.12);visibility:hidden;pointer-events:none;transform:translateY(-12px);opacity:0;transition:.2s}.search-layer.open{visibility:visible;pointer-events:auto;transform:none;opacity:1}.search-inner{max-width:1200px;margin:auto;padding:24px 20px 28px}.search-head{display:flex;align-items:center;justify-content:space-between}.search-head h2{margin:0;color:#0E3A46}.search-box input{width:100%;margin:18px 0 14px;min-height:50px;border:1px solid rgba(26,127,143,.24);border-radius:12px;padding:0 16px;font:inherit}.search-links{display:flex;gap:10px;flex-wrap:wrap}.search-links a{padding:10px 14px;background:#E7F3F6;border-radius:10px;font-weight:700}.search-hint{color:#7A9AA4;margin-bottom:0}.lock-scroll{overflow:hidden}.mobile-bottom{display:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:960px){.desktop-nav{gap:12px}.desktop-nav a{font-size:14px}.desktop-only{display:none}.topbar{gap:14px}.brand{min-width:auto}.footer-groups{grid-template-columns:repeat(3,1fr)}}@media(max-width:760px){body{padding-bottom:calc(52px + env(safe-area-inset-bottom))}.site-header .topbar{height:64px;padding:0 16px}.site-main{padding-top:64px}.desktop-nav{display:none}.brand{margin-right:auto}.brand-logo{height:30px;max-width:150px}.header-actions{gap:6px}.icon-button{padding:0 11px}.search-layer{top:64px}.hero,.inner-hero,.split,.app-showcase,.gallery-entry,.gallery-entry:nth-child(even){grid-template-columns:1fr}.gallery-entry:nth-child(even) .gallery-copy{order:initial}.hero{padding-top:28px}.hero-media{order:-1}.hero.reverse,.split.reverse{direction:ltr}.section{padding:44px 0}.section-head{align-items:start;flex-direction:column}.mag-grid{grid-template-columns:1fr}.two-col,.three-col,.four-col,.checklist{grid-template-columns:1fr}.page-shell{padding:22px 16px 48px}.context-nav{padding:18px 16px 0}.footer-brand{grid-template-columns:1fr}.footer-groups{grid-template-columns:repeat(2,1fr)}.site-footer{padding:46px 16px calc(82px + env(safe-area-inset-bottom))}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:60;height:calc(52px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid rgba(26,127,143,.18);display:grid;grid-template-columns:repeat(5,1fr)}.mobile-bottom a{display:grid;place-items:center;min-width:0;color:#4A7380;font-size:13px;font-weight:750}.mobile-bottom a.active{color:#1A7F8F;background:#E7F3F6}.search-links{display:grid;grid-template-columns:repeat(2,1fr)}.drawer{width:min(420px,90vw)}}@media(max-width:420px){.header-actions .icon-button{font-size:13px;padding:0 9px}.brand-text{font-size:20px}.footer-groups{grid-template-columns:1fr}.search-links{grid-template-columns:1fr}.button-row{display:grid}.btn{width:100%}}