*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F4FAFC;color:#24505A;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.78;overflow-x:hidden}body.locked{overflow: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 0;height:72px;background:rgba(255,255,255,.96);border-bottom:1px solid rgba(26,127,143,.16);z-index:40;backdrop-filter:blur(10px)}.header-inner{max-width:1200px;height:100%;margin:auto;padding:0 16px;display:grid;grid-template-columns:190px 1fr auto;gap:24px;align-items:center}.brand{display:flex;align-items:center;min-width:0}.brand-logo{height:34px;width:auto;object-fit:contain}.brand-text{font-weight:800;font-size:20px;color:#0E3A46}.main-nav{display:flex;justify-content:center;align-items:center;gap:clamp(12px,2vw,28px);white-space:nowrap}.main-nav a{position:relative;padding:24px 0 20px;color:#24505A;font-weight:650}.main-nav a.is-current{color:#1A7F8F}.main-nav a.is-current:after{content:"";position:absolute;left:0;right:0;bottom:13px;height:3px;border-radius:3px;background:#1A7F8F}.header-actions{display:flex;align-items:center;gap:8px}.icon-button,.close-button{min-height:44px;border:1px solid rgba(26,127,143,.16);background:#fff;color:#0F5B68;border-radius:12px;padding:0 14px;font:inherit;font-weight:700;cursor:pointer}.header-app{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border-radius:12px;background:#D7EEF2;color:#0F5B68;font-weight:700}main{padding-top:72px;min-height:70vh}.breadcrumb-wrap{max-width:1200px;margin:0 auto;padding:24px 16px 0}.breadcrumb{display:flex;gap:8px;flex-wrap:wrap;align-items:center;font-size:14px;color:#7A9AA4}.breadcrumb strong{color:#4A7380}.wrap{max-width:1200px;margin:0 auto;padding:0 16px}.hero{padding:48px 0 40px}.hero-image{background:#E7F3F6;border-radius:18px;padding:10px;box-shadow:0 14px 34px rgba(14,58,70,.08)}.hero-image img{width:100%;height:auto;max-height:420px;object-fit:contain;object-position:center;margin:auto}.hero-copy{max-width:820px;padding:32px 0 0}.eyebrow{font-weight:800;color:#1A7F8F;letter-spacing:.08em}.hero h1,.page-hero h1{font-size:clamp(28px,4vw,34px);line-height:1.25;color:#0E3A46;margin:8px 0 18px}.hero p,.page-hero p{font-size:17px}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.btn{display:inline-flex;min-height:44px;align-items:center;justify-content:center;padding:10px 18px;border-radius:12px;font-weight:800}.btn-primary{background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff}.btn-secondary{background:#fff;color:#0F5B68;border:1px solid rgba(26,127,143,.22)}.section{padding:58px 0}.section.alt{background:#E7F3F6}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:flex-end;margin-bottom:26px}.section-head h2{margin:0;color:#0E3A46;font-size:28px}.section-head p{max-width:650px;margin:0;color:#4A7380}.lead-grid{display:grid;grid-template-columns:1.4fr .8fr;gap:24px}.lead-card,.story-card,.soft-card{background:#fff;border:1px solid rgba(26,127,143,.16);border-radius:16px;box-shadow:0 14px 34px rgba(14,58,70,.06)}.lead-card{padding:18px}.lead-card img,.story-card img{width:100%;height:auto;object-fit:contain;object-position:center;border-radius:12px}.lead-card .copy{padding:8px 4px}.mini-list{display:grid;gap:14px}.mini-list a{display:block;padding:20px;background:#fff;border:1px solid rgba(26,127,143,.14);border-radius:14px}.mini-list strong{display:block;color:#0E3A46;font-size:18px;margin-bottom:6px}.magazine{display:grid;grid-template-columns:1.5fr .75fr .75fr;gap:18px}.story-card{padding:18px}.story-card h3{color:#0E3A46;margin:12px 0 6px}.story-card p{margin:0}.zigzag{display:grid;gap:28px}.zig{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center;padding:26px;background:#fff;border-radius:18px;border:1px solid rgba(26,127,143,.14)}.zig:nth-child(even) .media{order:2}.zig h3{font-size:24px;color:#0E3A46;margin:0 0 8px}.media img{width:100%;height:auto;max-height:320px;object-fit:contain;object-position:center;margin:auto}.index-split{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:start}.index-links{display:grid;gap:10px}.index-links a{display:flex;justify-content:space-between;gap:14px;padding:16px 0;border-bottom:1px solid rgba(26,127,143,.16)}.feature-band{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;padding:30px;background:#fff;border:1px solid rgba(26,127,143,.15);border-radius:18px}.tool-list{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tool-list article{background:#fff;border-left:4px solid #2BB3C4;padding:18px;border-radius:10px;box-shadow:0 14px 34px rgba(14,58,70,.05)}.app-grid{display:grid;grid-template-columns:minmax(220px,.75fr) 1.4fr;gap:36px;align-items:center}.app-media{display:flex;gap:18px;align-items:center;justify-content:center}.app-shot{max-height:440px;width:auto;object-fit:contain}.app-icon{width:64px;height:64px;object-fit:contain}.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.soft-card{padding:22px}.soft-card h3{color:#0E3A46;margin-top:0}.faq-preview{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.faq-preview a{padding:18px;background:#fff;border-radius:14px;border:1px solid rgba(26,127,143,.14);font-weight:700}.page-hero{max-width:1200px;margin:auto;padding:30px 16px 26px}.page-hero .intro{max-width:850px}.page-layout{max-width:1200px;margin:auto;padding:0 16px 64px}.reading{max-width:820px}.reading h2{color:#0E3A46;font-size:24px;margin:36px 0 10px}.reading p{margin:0 0 18px}.reading ul,.reading ol{padding-left:1.2em}.reading li{margin:8px 0}.page-media{margin:20px 0 28px;background:#E7F3F6;border-radius:18px;padding:12px}.page-media img{width:100%;height:auto;max-height:420px;object-fit:contain;object-position:center;margin:auto}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:24px}.chapter-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.chapter{background:#fff;padding:24px;border:1px solid rgba(26,127,143,.14);border-radius:16px}.chapter h2,.chapter h3{color:#0E3A46;margin-top:0}.number-lines{counter-reset:item;display:grid;gap:12px}.number-lines article{counter-increment:item;display:grid;grid-template-columns:52px 1fr;gap:18px;padding:18px 0;border-bottom:1px solid rgba(26,127,143,.14)}.number-lines article:before{content:counter(item,decimal-leading-zero);font-weight:900;font-size:24px;color:#2BB3C4}.timeline{border-left:2px solid #2BB3C4;margin-left:14px;padding-left:28px}.timeline article{position:relative;padding:0 0 28px}.timeline article:before{content:"";position:absolute;left:-36px;top:8px;width:14px;height:14px;border-radius:50%;background:#1A7F8F;border:4px solid #F4FAFC}.steps{display:grid;gap:16px;counter-reset:step}.steps article{counter-increment:step;display:grid;grid-template-columns:70px 1fr;gap:18px;background:#fff;border:1px solid rgba(26,127,143,.14);border-radius:16px;padding:22px}.steps article:before{content:"0" counter(step);font-size:28px;font-weight:900;color:#1A7F8F}.policy{display:grid;gap:18px}.policy section{background:#fff;border:1px solid rgba(26,127,143,.14);border-radius:16px;padding:24px}.policy h2{color:#0E3A46;margin-top:0}.faq-list{display:grid;gap:12px}.faq-list details{background:#fff;border:1px solid rgba(26,127,143,.14);border-radius:14px;padding:0 18px}.faq-list summary{cursor:pointer;font-weight:800;color:#0E3A46;padding:18px 0}.faq-list p{padding:0 0 18px;margin:0}.site-footer{background:#0E3A46;color:#D4E8EC;padding:52px 0 82px}.footer-inner{max-width:1200px;margin:auto;padding:0 16px}.footer-brand{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:start;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.12)}.footer-brand-link{display:flex;align-items:center;gap:14px;color:#fff}.footer-logo{height:32px;width:auto;object-fit:contain}.footer-brand-link span{display:flex;flex-direction:column}.footer-brand-link em{font-style:normal;color:#9FCBD3;font-size:13px}.footer-brand p{margin:0}.footer-groups{display:grid;grid-template-columns:repeat(5,1fr);gap:24px;padding:30px 0}.footer-groups h2{font-size:16px;color:#fff}.footer-groups a{display:block;color:#D4E8EC;margin:7px 0}.footer-bottom{padding-top:20px;border-top:1px solid rgba(255,255,255,.12);color:#9FCBD3}.overlay{position:fixed;inset:0;background:rgba(5,28,34,.48);z-index:60;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.drawer{position:fixed;z-index:70;right:0;top:0;bottom:0;width:min(430px,90vw);background:#fff;box-shadow:-20px 0 50px rgba(14,58,70,.15);transform:translateX(100%);visibility:hidden;pointer-events:none;transition:.25s;overflow-y:auto}.drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;background:#fff;display:flex;justify-content:space-between;align-items:center;padding:16px;border-bottom:1px solid rgba(26,127,143,.14);z-index:2}.drawer-brand{display:flex;align-items:center;gap:10px;color:#0E3A46}.drawer-brand img{height:30px;width:auto;object-fit:contain}.drawer-groups{padding:8px 18px 30px}.drawer-groups section{padding:16px 0;border-bottom:1px solid rgba(26,127,143,.12)}.drawer-groups h2{font-size:17px;color:#1A7F8F;margin:0 0 8px}.drawer-groups a{display:block;padding:9px 0}.drawer-groups a strong{display:block;color:#0E3A46}.drawer-groups a span{display:block;color:#4A7380;font-size:14px}.search-panel{position:fixed;z-index:72;left:0;right:0;top:72px;background:#fff;border-bottom:1px solid rgba(26,127,143,.16);box-shadow:0 18px 36px rgba(14,58,70,.1);transform:translateY(-18px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.search-panel.is-open{transform:none;opacity:1;visibility:visible;pointer-events:auto}.search-panel-inner{max-width:1200px;margin:auto;padding:22px 16px}.search-head{display:flex;justify-content:space-between;align-items:center}.search-head h2{margin:0;color:#0E3A46}.search-field{display:grid;gap:8px;margin:18px 0}.search-field span{color:#4A7380}.search-field input{width:100%;min-height:48px;border:1px solid rgba(26,127,143,.24);border-radius:12px;padding:0 14px;font:inherit}.search-links{display:flex;flex-wrap:wrap;gap:10px}.search-links a{padding:8px 12px;background:#E7F3F6;border-radius:10px}.mobile-bottom{display:none}.content-image{width:100%;height:auto;max-width:100%;object-fit:contain;object-position:center}.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:920px){.header-inner{grid-template-columns:1fr auto;gap:10px}.main-nav,.header-app{display:none}.brand-logo{max-width:180px}.magazine{grid-template-columns:1fr 1fr}.magazine .story-card:first-child{grid-column:1/-1}.tool-list{grid-template-columns:1fr 1fr}.footer-groups{grid-template-columns:repeat(3,1fr)}.lead-grid,.index-split,.feature-band,.app-grid{grid-template-columns:1fr}.three-col{grid-template-columns:1fr}.two-col{grid-template-columns:1fr}}@media(max-width:680px){.site-header{height:64px}.header-inner{height:64px}.brand-logo{height:30px;max-width:150px}.header-actions{gap:6px}.icon-button{padding:0 10px}main{padding-top:64px;padding-bottom:64px}.search-panel{top:64px}.hero{padding-top:26px}.section{padding:42px 0}.section-head{display:block}.section-head p{margin-top:8px}.lead-grid,.magazine,.zig,.chapter-grid{grid-template-columns:1fr}.zig:nth-child(even) .media{order:0}.tool-list{grid-template-columns:1fr}.faq-preview{grid-template-columns:1fr}.footer-brand{grid-template-columns:1fr}.footer-groups{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:96px}.mobile-bottom{display:grid;position:fixed;z-index:50;left:0;right:0;bottom:0;grid-template-columns:repeat(5,1fr);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,.16)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;color:#4A7380;font-size:13px;font-weight:800}.mobile-bottom a.is-current{color:#1A7F8F;background:#E7F3F6}.page-hero{padding-top:24px}.steps article{grid-template-columns:52px 1fr;padding:18px}.number-lines article{grid-template-columns:44px 1fr}.app-media{flex-direction:column}.footer-groups section:last-child{grid-column:1/-1}}