:root{--bg:#F4FAFC;--surface:#fff;--soft:#E7F3F6;--ink:#0E3A46;--text:#24505A;--muted:#4A7380;--aux:#7A9AA4;--sea:#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;--header:72px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto;object-fit:contain;object-position:center}.container{width:min(var(--max),calc(100% - 40px));margin-inline:auto}.site-main{padding-top:var(--header);min-height:70vh}.skip-link{position:fixed;left:16px;top:-80px;z-index:1000;background:var(--deep);color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:8px}.site-header{position:fixed;inset:0 0 auto 0;height:var(--header);z-index:90;background:rgba(255,255,255,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.header-inner{width:min(var(--max),calc(100% - 40px));height:100%;margin:auto;display:grid;grid-template-columns:180px 1fr auto;align-items:center;gap:24px}.brand{display:inline-flex;align-items:center;min-width:0}.brand-logo{height:34px;width:auto;max-width:170px}.brand-text{font-size:22px;font-weight:800;color:var(--ink)}.desktop-nav{display:flex;justify-content:center;align-items:center;gap:22px;white-space:nowrap}.desktop-nav a{position:relative;padding:8px 2px;color:var(--muted);font-weight:650}.desktop-nav a:hover,.desktop-nav a:focus-visible,.desktop-nav a.active{color:var(--sea)}.desktop-nav a.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--sea);border-radius:2px}.header-actions{display:flex;align-items:center;gap:8px}.icon-btn,.menu-btn,.close-btn{min-height:44px;border:1px solid var(--line);background:#fff;color:var(--deep);border-radius:10px;padding:0 14px;font:inherit;cursor:pointer}.app-link{min-height:44px;display:inline-flex;align-items:center;padding:0 16px;border-radius:10px;background:linear-gradient(135deg,#2BB3C4 0%,#1A7F8F 55%,#0F5B68 100%);color:#fff;font-weight:700}.icon-btn:hover,.menu-btn:hover,.close-btn:hover{background:var(--soft)}:focus-visible{outline:3px solid rgba(43,179,196,.35);outline-offset:2px}.context-wrap{padding-top:22px}.context-nav{display:flex;flex-wrap:wrap;gap:7px;font-size:14px;color:var(--aux)}.context-nav a:hover{color:var(--sea)}
.hero,.page-hero{padding:42px 0 56px}.hero-media{background:var(--pale);border-radius:20px;padding:14px;margin-bottom:30px;box-shadow:var(--shadow)}.hero-media img{width:100%;max-height:420px;margin:auto}.hero-copy{max-width:860px}.eyebrow{margin:0 0 8px;color:var(--sea);font-weight:800;letter-spacing:.06em;font-size:14px}.hero h1,.page-hero h1{margin:.1em 0 .45em;color:var(--ink);font-size:clamp(28px,4vw,36px);line-height:1.25}.hero p,.page-hero p{font-size:17px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn{display:inline-flex;min-height:44px;align-items:center;justify-content:center;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:58px 0}.section-soft{background:var(--soft)}.section-white{background:#fff}.section-head{display:flex;align-items:end;justify-content:space-between;gap:22px;margin-bottom:26px}.section-head h2{margin:0;color:var(--ink);font-size:clamp(24px,3vw,30px);line-height:1.3}.section-head p{margin:0;max-width:650px;color:var(--muted)}.text-link{color:var(--sea);font-weight:750}.lead-grid{display:grid;grid-template-columns:1.4fr .9fr;gap:24px}.lead-story,.stack-card,.mag-card,.content-panel,.topic-box,.step,.faq-item,.help-group,.rule-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.lead-story{padding:22px}.lead-story img{width:100%;max-height:330px;margin-bottom:18px}.lead-story h3,.stack-card h3,.mag-card h3{color:var(--ink);margin:.2em 0}.stack{display:grid;gap:14px}.stack-card{padding:18px}.mag-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr;gap:18px}.mag-card{padding:18px;min-height:180px}.mag-card.primary{min-height:300px}.mag-card img{margin-bottom:14px;max-height:250px;width:100%}.zigzag{display:grid;gap:26px}.zig-item{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.zig-item:nth-child(even) .zig-media{order:2}.zig-media{background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px}.zig-media img{width:100%;max-height:280px}.zig-copy h3{font-size:24px;color:var(--ink);margin:.1em 0}.index-split{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:start}.feature-media{background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px}.feature-media img{width:100%;max-height:390px}.index-list{display:grid;gap:12px}.index-list a{display:block;background:#fff;border:1px solid var(--line);padding:16px 18px;border-radius:14px}.index-list a:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.plain-list{margin:0;padding:0;list-style:none;display:grid;gap:12px}.plain-list li{padding:14px 0;border-bottom:1px solid var(--line)}.plain-list strong{color:var(--ink)}.three-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.three-cols article{padding:20px;background:#fff;border-top:4px solid var(--sea);border-radius:0 0 14px 14px}.app-feature{display:grid;grid-template-columns:minmax(220px,380px) 1fr;gap:36px;align-items:center}.app-media{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap}.app-media .app-shot{max-height:440px;width:auto}.app-media .app-icon{width:72px;height:72px}.faq-preview{display:grid;grid-template-columns:1fr 1fr;gap:16px}.faq-preview article{border-left:3px solid var(--bright);padding:4px 0 4px 16px}.brand-final{max-width:860px}
.page-hero{padding-bottom:28px}.page-hero .inner{max-width:880px}.page-hero-media{margin-top:28px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px}.page-hero-media img{width:100%;max-height:360px}.article-wrap{padding:18px 0 68px}.article-narrow{max-width:840px}.article-prose h2,.article-prose h3{color:var(--ink);line-height:1.35}.article-prose h2{font-size:24px;margin-top:2em}.article-prose h3{font-size:20px;margin-top:1.6em}.article-prose p{margin:1em 0}.number-lines{counter-reset:line;display:grid;gap:14px;margin:28px 0}.number-lines article{counter-increment:line;display:grid;grid-template-columns:54px 1fr;gap:14px;padding:18px 0;border-bottom:1px solid var(--line)}.number-lines article:before{content:counter(line,decimal-leading-zero);font-weight:850;color:var(--bright);font-size:24px}.detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:24px 0}.content-panel,.topic-box{padding:22px}.content-panel h2,.topic-box h2,.topic-box h3{margin-top:0;color:var(--ink)}.side-index{display:grid;grid-template-columns:260px 1fr;gap:28px;align-items:start}.side-index nav{position:sticky;top:96px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px}.side-index nav a{display:block;padding:10px;border-bottom:1px solid var(--line)}.side-index nav a:last-child{border-bottom:0}.timeline{position:relative;margin:26px 0;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 20px}.timeline article:before{content:"";position:absolute;width:12px;height:12px;border-radius:50%;background:var(--sea);left:-27px;top:8px}.checklist{list-style:none;padding:0;margin:20px 0}.checklist li{position:relative;padding:12px 0 12px 30px;border-bottom:1px solid var(--line)}.checklist li:before{content:"✓";position:absolute;left:2px;color:var(--sea);font-weight:800}.gallery-stream{display:grid;gap:28px}.gallery-entry{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(260px,.9fr);gap:24px;align-items:center;padding-bottom:28px;border-bottom:1px solid var(--line)}.gallery-entry:nth-child(even) .gallery-picture{order:2}.gallery-picture{background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px}.gallery-picture img{width:100%;max-height:360px}.reading-paths{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:30px 0}.reading-paths article{padding:22px;background:var(--soft);border-radius:16px}.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin:28px 0}.step{padding:18px}.step b{display:block;color:var(--bright);font-size:22px;margin-bottom:8px}.rule-block,.help-group{padding:22px;margin:16px 0}.rule-block h2,.help-group h2{margin-top:0}.faq-list{display:grid;gap:14px}.faq-item{padding:20px}.faq-item summary{cursor:pointer;font-weight:800;color:var(--ink);font-size:18px}.faq-item p{margin-bottom:0}.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.contact-grid .content-panel{min-height:190px}.notice{background:var(--pale);padding:18px 20px;border-radius:14px;color:var(--deep)}
.site-footer{background:var(--ink);color:#D4E8EC;padding:50px 0 calc(28px + env(safe-area-inset-bottom))}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:30px}.footer-logo{height:34px;width:auto;max-width:170px;filter:brightness(0) invert(1)}.footer-brand div{display:flex;flex-direction:column}.footer-brand strong{color:#fff;font-size:20px}.footer-brand span{font-size:12px;letter-spacing:.15em}.footer-groups{display:grid;grid-template-columns:repeat(5,1fr);gap:24px}.footer-groups h2{color:#fff;font-size:16px;margin-top:0}.footer-groups a{display:block;padding:4px 0;color:#D4E8EC;font-size:14px}.footer-groups a:hover{color:#fff}.footer-note{margin:32px 0 8px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14)}.copyright{margin:0;color:#9FC2CA;font-size:14px}.overlay{position:fixed;inset:0;background:rgba(14,58,70,.38);z-index:110;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.drawer{position:fixed;z-index:120;top:0;right:0;width:min(440px,90vw);height:100dvh;background:#fff;box-shadow:-12px 0 40px rgba(14,58,70,.18);transform:translateX(105%);visibility:hidden;pointer-events:none;transition:.26s;overflow-y:auto}.drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;background:#fff;z-index:2;display:flex;justify-content:space-between;align-items:center;padding:16px;border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink)}.drawer-brand img{height:30px;width:auto;max-width:150px}.drawer-groups{padding:10px 16px 28px}.drawer-groups section{padding:12px 0}.drawer-groups h2{font-size:15px;color:var(--sea);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 strong{color:var(--ink)}.drawer-groups span{color:var(--muted);font-size:13px;line-height:1.55;margin-top:2px}.search-panel{position:fixed;top:var(--header);left:0;right:0;z-index:125;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);padding:26px 0;transform:translateY(-120%);visibility:hidden;pointer-events:none;transition:.22s}.search-panel.is-open{transform:translateY(0);visibility:visible;pointer-events:auto}.search-top{display:flex;justify-content:space-between;gap:20px;align-items:center}.search-top h2{margin:0;color:var(--ink)}.search-box{display:block;margin:18px 0}.search-box input{width:100%;min-height:50px;border:1px solid var(--line);border-radius:12px;padding:0 16px;font:inherit;color:var(--text)}.search-links{display:flex;gap:10px;flex-wrap:wrap}.search-links a{border:1px solid var(--line);background:var(--soft);color:var(--deep);padding:8px 12px;border-radius:10px}.search-hint{margin-bottom:0;color:var(--aux);font-size:14px}.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:1000px){.header-inner{grid-template-columns:150px 1fr auto;gap:12px}.desktop-nav{gap:12px;font-size:14px}.app-link{display:none}.mag-grid{grid-template-columns:1fr 1fr}.mag-card.primary{grid-row:span 2}.steps{grid-template-columns:repeat(3,1fr)}.footer-groups{grid-template-columns:repeat(3,1fr)}}
@media(max-width:820px){:root{--header:64px}.container,.header-inner{width:min(100% - 32px,var(--max))}.header-inner{grid-template-columns:1fr auto}.desktop-nav{display:none}.brand-logo{height:30px;max-width:145px}.header-actions{gap:6px}.icon-btn,.menu-btn{padding:0 12px}.site-main{padding-bottom:66px}.hero,.page-hero{padding-top:30px}.lead-grid,.index-split,.app-feature,.side-index{grid-template-columns:1fr}.mag-grid{grid-template-columns:1fr}.mag-card.primary{grid-row:auto}.zig-item,.gallery-entry{grid-template-columns:1fr}.zig-item:nth-child(even) .zig-media,.gallery-entry:nth-child(even) .gallery-picture{order:0}.three-cols,.reading-paths{grid-template-columns:1fr}.detail-grid,.contact-grid,.faq-preview{grid-template-columns:1fr}.steps{grid-template-columns:1fr 1fr}.side-index nav{position:static}.footer-groups{grid-template-columns:1fr 1fr}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;z-index:95;background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{min-height:52px;display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--muted)}.mobile-bottom a.active{color:var(--sea);font-weight:800;background:var(--pale)}.drawer{z-index:130}.overlay{z-index:120}.search-panel{z-index:135}.site-footer{padding-bottom:calc(80px + env(safe-area-inset-bottom))}}
@media(max-width:560px){.section{padding:44px 0}.section-head{display:block}.section-head p{margin-top:8px}.hero-media{padding:8px;border-radius:14px}.hero h1,.page-hero h1{font-size:30px}.actions{display:grid;grid-template-columns:1fr}.btn{width:100%}.steps{grid-template-columns:1fr}.footer-groups{grid-template-columns:1fr 1fr;gap:18px}.search-panel{padding:18px 0;max-height:calc(100dvh - var(--header));overflow-y:auto}.search-top h2{font-size:22px}.header-inner{width:calc(100% - 24px)}.brand-logo{max-width:122px}.header-actions button{min-width:44px;padding:0 9px}.number-lines article{grid-template-columns:44px 1fr}.gallery-picture img{max-height:none}}