:root{--bg:#F4FAFC;--paper:#fff;--soft:#E7F3F6;--ink:#0E3A46;--text:#24505A;--muted:#4A7380;--quiet:#7A9AA4;--brand:#1A7F8F;--bright:#2BB3C4;--deep:#0F5B68;--pale:#D7EEF2;--line:rgba(26,127,143,.16);--shadow:0 14px 34px rgba(14,58,70,.08);--radius:16px;--max:1200px}*{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","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.78;overflow-x:hidden;padding-top:72px}body.modal-open{overflow:hidden}a{color:var(--deep);text-decoration:none}a:hover{color:var(--brand)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(43,179,196,.4);outline-offset:3px}img{width:100%;height:auto;max-width:100%;object-fit:contain;object-position:center;display:block}.skip-link{position:fixed;left:16px;top:-80px;z-index:9999;background:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:10px}.site-header{position:fixed;top:0;left:0;right:0;height:72px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);z-index:800;backdrop-filter:blur(10px)}.header-inner{max-width:var(--max);height:72px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:26px}.brand-link{display:flex;align-items:center;min-width:132px}.brand-logo{height:34px;width:auto;max-width:180px}.brand-text{font-weight:800;font-size:22px;color:var(--ink)}.desktop-nav{display:flex;justify-content:center;align-items:center;gap:8px;white-space:nowrap}.desktop-nav a{padding:10px 12px;border-radius:10px;color:var(--text);font-weight:650}.desktop-nav a.is-active{color:var(--brand);background:var(--pale)}.header-actions{display:flex;align-items:center;gap:8px}.icon-button,.drawer-close,.search-close{min-height:44px;border:1px solid var(--line);background:#fff;color:var(--deep);border-radius:10px;padding:0 13px;font:inherit;cursor:pointer}.app-link{display:inline-flex;min-height:44px;align-items:center;padding:0 14px;border-radius:10px;background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff;font-weight:700}.site-main{min-height:60vh}.context-wrap{max-width:var(--max);margin:0 auto;padding:28px 20px 0}.breadcrumb{font-size:14px;color:var(--quiet);display:flex;gap:7px;flex-wrap:wrap}.breadcrumb a{color:var(--muted)}.container{max-width:var(--max);margin:0 auto;padding:0 20px}.hero{padding:54px 0 46px}.hero-media{background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow);margin-bottom:28px;max-height:440px;display:flex;align-items:center;justify-content:center}.hero-media img{max-height:420px}.eyebrow{font-size:14px;letter-spacing:.12em;color:var(--brand);font-weight:800}.hero h1,.page-hero h1{font-size:clamp(29px,4vw,40px);line-height:1.2;color:var(--ink);margin:.4em 0}.hero-copy,.page-hero p{max-width:760px;font-size:17px}.actions{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:11px;font-weight:750}.btn.primary{background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff}.btn.secondary{background:#fff;color:var(--deep);border:1px solid var(--line)}.section{padding:56px 0}.section.alt{background:var(--soft)}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:28px}.section-head h2{font-size:clamp(24px,3vw,32px);color:var(--ink);margin:0}.section-head p{margin:0;max-width:650px;color:var(--muted)}.feature-grid{display:grid;grid-template-columns:1.45fr .9fr;gap:24px}.feature-main,.feature-side article,.card,.text-panel,.tool-card,.faq-card,.chapter,.step,.policy-section,.help-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.feature-main{padding:24px}.feature-side{display:grid;gap:16px}.feature-side article{padding:20px}.feature-main h3,.feature-side h3,.card h3,.chapter h2,.step h2,.policy-section h2,.help-card h2{color:var(--ink);margin-top:0}.feature-image{margin:-6px -6px 18px;background:var(--pale);border-radius:14px;padding:8px}.feature-image img{max-height:330px}.magazine-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:18px;align-items:stretch}.magazine-grid article{background:#fff;border-top:4px solid var(--brand);padding:24px;border-radius:0 0 14px 14px}.stagger{display:grid;gap:26px}.stagger article{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:26px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px}.stagger article:nth-child(even) .stagger-media{order:2}.stagger-media{background:var(--pale);border-radius:14px;padding:8px}.stagger-media img{max-height:280px}.split{display:grid;grid-template-columns:1.15fr .85fr;gap:28px}.index-list{display:grid;gap:12px}.index-list a{background:#fff;border-bottom:1px solid var(--line);padding:17px 18px;font-weight:700}.wide-banner{display:grid;grid-template-columns:1fr 1.2fr;gap:28px;align-items:center;background:#fff;border-radius:18px;padding:24px;border:1px solid var(--line)}.wide-banner .media{background:var(--pale);border-radius:14px;padding:8px}.wide-banner .media img{max-height:320px}.tool-list{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.tool-card{padding:20px}.tool-card strong{display:block;color:var(--ink);margin-bottom:6px}.three-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{padding:22px}.app-showcase{display:grid;grid-template-columns:.75fr 1.25fr;gap:34px;align-items:center}.app-visual{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center;background:#fff;border-radius:18px;padding:20px;border:1px solid var(--line)}.app-shot img{max-height:440px;width:auto;margin:auto}.app-icon img{width:64px;height:64px}.page-hero{padding:40px 0 30px}.page-hero .media{margin-top:26px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px}.page-hero .media img{max-height:380px}.content-shell{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:34px;padding-bottom:60px}.article-flow{min-width:0}.chapter,.policy-section,.help-card{padding:26px;margin-bottom:20px}.chapter p:last-child,.policy-section p:last-child{margin-bottom:0}.side-index{position:sticky;top:96px;align-self:start;background:var(--pale);border-radius:14px;padding:20px}.side-index h2{font-size:18px;color:var(--ink);margin-top:0}.side-index a{display:block;padding:10px 0;border-bottom:1px solid rgba(15,91,104,.13)}.number-lines{counter-reset:item;display:grid;gap:14px}.number-lines article{counter-increment:item;display:grid;grid-template-columns:48px 1fr;gap:14px;padding:18px 0;border-bottom:1px solid var(--line)}.number-lines article:before{content:counter(item,decimal-leading-zero);font-weight:800;color:var(--brand);font-size:18px}.detail-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.detail-list article{background:#fff;border-left:4px solid var(--bright);padding:20px}.timeline{position:relative;padding-left:28px}.timeline:before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--pale)}.timeline article{position:relative;padding:0 0 28px 18px}.timeline article:before{content:"";position:absolute;left:-27px;top:9px;width:12px;height:12px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 5px var(--pale)}.gallery-stack{display:grid;gap:28px}.gallery-stack figure{margin:0;background:#fff;border:1px solid var(--line);padding:12px;border-radius:16px}.gallery-stack figcaption{padding:12px 6px 4px;color:var(--muted)}.steps{display:grid;gap:16px;counter-reset:steps}.step{counter-increment:steps;padding:24px;display:grid;grid-template-columns:54px 1fr;gap:16px}.step:before{content:counter(steps);width:44px;height:44px;border-radius:12px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800}.faq-list{display:grid;gap:14px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px}.faq-item summary{font-weight:800;color:var(--ink);cursor:pointer}.faq-item p{margin-bottom:0}.site-footer{background:#0E3A46;color:#D4E8EC;padding:52px 0 calc(28px + env(safe-area-inset-bottom))}.footer-inner{max-width:var(--max);margin:auto;padding:0 20px}.footer-brand{display:grid;grid-template-columns:280px 1fr;gap:24px;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:34px;width:auto;max-width:160px}.footer-brand-link span{display:grid}.footer-brand-link small{letter-spacing:.12em;color:#A9D2DA}.footer-brand p{margin:0;max-width:700px}.footer-columns{display:grid;grid-template-columns:repeat(5,1fr);gap:24px;padding:32px 0}.footer-columns section{display:flex;flex-direction:column;gap:8px}.footer-columns h2{font-size:15px;color:#fff;margin:0 0 6px}.footer-columns a{color:#D4E8EC;font-size:14px}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;font-size:14px}.overlay{position:fixed;inset:0;background:rgba(5,34,40,.45);z-index:900}.category-drawer{position:fixed;top:0;right:0;width:min(440px,90vw);height:100dvh;background:#fff;z-index:950;box-shadow:-18px 0 45px rgba(14,58,70,.18);transform:translateX(105%);visibility:hidden;pointer-events:none;transition:.25s ease;overflow:auto}.category-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 18px;border-bottom:1px solid var(--line);z-index:2}.drawer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink)}.drawer-logo{height:30px;width:auto;max-width:150px}.drawer-groups{padding:18px}.drawer-groups section{padding:12px 0}.drawer-groups h2{font-size:17px;color:var(--ink);margin:0 0 8px}.drawer-groups a{display:block;padding:10px 0;border-bottom:1px solid var(--line)}.drawer-groups strong,.drawer-groups span{display:block}.drawer-groups span{color:var(--muted);font-size:14px;line-height:1.55}.search-panel{position:fixed;top:72px;left:0;right:0;z-index:940;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 20px 40px rgba(14,58,70,.14);transform:translateY(-120%);visibility:hidden;pointer-events:none;transition:.25s ease}.search-panel.is-open{transform:translateY(0);visibility:visible;pointer-events:auto}.search-inner{max-width:var(--max);margin:auto;padding:22px 20px 26px}.search-head{display:flex;justify-content:space-between;align-items:center}.search-head h2{margin:0;color:var(--ink)}.search-inner label{display:block;margin:14px 0 8px;color:var(--muted)}.search-inner input{width:100%;min-height:48px;border:1px solid var(--line);border-radius:11px;padding:0 14px;font:inherit;color:var(--ink)}.search-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}.search-links a{background:var(--pale);padding:9px 12px;border-radius:9px}.mobile-bottom{display:none}
@media(max-width:1040px){.desktop-nav{gap:2px}.desktop-nav a{padding:10px 8px;font-size:14px}.header-inner{gap:12px}.app-link{display:none}.footer-columns{grid-template-columns:repeat(3,1fr)}}
@media(max-width:820px){body{padding-top:64px;padding-bottom:calc(58px + env(safe-area-inset-bottom))}.site-header,.header-inner{height:64px}.header-inner{grid-template-columns:1fr auto;padding:0 16px}.desktop-nav{display:none}.brand-link{min-width:0}.brand-logo{height:30px;max-width:145px}.header-actions{gap:6px}.icon-button{padding:0 10px}.search-panel{top:64px}.mobile-bottom{position:fixed;bottom:0;left:0;right:0;z-index:850;height:calc(52px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid var(--line)}.mobile-bottom a{display:grid;place-items:center;min-height:52px;font-size:13px;color:var(--muted)}.mobile-bottom a.is-current{color:#fff;background:var(--brand);font-weight:800}.context-wrap{padding:20px 16px 0}.container{padding-left:16px;padding-right:16px}.hero{padding:34px 0}.feature-grid,.split,.wide-banner,.app-showcase,.content-shell{grid-template-columns:1fr}.magazine-grid{grid-template-columns:1fr 1fr}.magazine-grid article:first-child{grid-column:1/-1}.stagger article{grid-template-columns:1fr}.stagger article:nth-child(even) .stagger-media{order:0}.tool-list{grid-template-columns:1fr 1fr}.three-cols{grid-template-columns:1fr}.side-index{position:static}.footer-brand{grid-template-columns:1fr}.footer-columns{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:calc(76px + env(safe-area-inset-bottom))}.section{padding:42px 0}.section-head{align-items:flex-start;flex-direction:column}.detail-list{grid-template-columns:1fr}}
@media(max-width:520px){.header-inner{grid-template-columns:minmax(0,1fr) auto}.brand-text{font-size:20px}.header-actions .icon-button{font-size:14px;min-width:48px}.hero h1,.page-hero h1{font-size:29px}.magazine-grid,.tool-list{grid-template-columns:1fr}.magazine-grid article:first-child{grid-column:auto}.footer-columns{grid-template-columns:1fr}.drawer-groups{padding:14px}.search-links{display:grid;grid-template-columns:1fr 1fr}.actions{flex-direction:column;align-items:stretch}.btn{width:100%}.steps .step{grid-template-columns:44px 1fr;padding:20px}.footer-brand{gap:16px}}