:root{--bg:#F5FAFB;--deep:#fff;--soft:#EAF4F6;--title:#103D48;--text:#28545D;--muted:#537A83;--hint:#7F9DA4;--brand:#1A7F8F;--bright:#2BB3C4;--deepsea:#0F5B68;--pale:#D8EEF2;--sand:#F3EEE4;--border:rgba(26,127,143,.15);--shadow:0 14px 34px rgba(14,58,70,.08);--max:1200px;--header:132px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.75;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.shell{width:min(var(--max),calc(100% - 40px));margin:auto}.site-header{position:fixed;z-index:50;left:0;top:0;right:0}.tide-line{height:24px;background:var(--deepsea);color:#fff;font-size:12px}.tide-inner{display:flex;height:100%;align-items:center;justify-content:space-between}.tide-inner div{display:flex;gap:16px}.text-button{border:0;background:none;color:#fff;padding:0;cursor:pointer}.brand-mini{font-weight:700;letter-spacing:.04em}.brand-bar{height:68px;background:#fff;border-bottom:1px solid var(--border)}.brand-inner{height:100%;display:flex;align-items:center;gap:28px}.brand-logo{display:flex;align-items:center;min-width:164px;gap:10px;color:var(--title);font-weight:800}.brand-logo img,.footer-brand img{height:34px;width:auto;object-fit:contain}.brand-logo img+.logo-fallback{display:none}.logo-fallback{white-space:nowrap}.primary-nav{display:flex;gap:6px;flex:1;justify-content:center}.primary-nav a,.context-nav a,.mobile-cats a{min-height:44px;display:flex;align-items:center;justify-content:center;padding:0 15px;border-radius:10px;color:var(--title);font-weight:700}.primary-nav a.active,.context-nav a.active,.mobile-cats 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.8fr .8fr;gap:18px}.editor-grid.second{grid-template-columns:.8fr 1.4fr .8fr;margin-top:18px}.mag-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:var(--shadow)}.mag-card p{color:var(--muted)}.link-row{display:flex;gap:10px;flex-wrap:wrap}.link-row a,.text-link{color:var(--deepsea);font-weight:700;border-bottom:1px solid rgba(15,91,104,.25)}.split{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}.feature-media{background:#fff;border-radius:16px;padding:14px;border:1px solid var(--border)}.number-list{display:grid;gap:14px}.number-item{display:grid;grid-template-columns:54px 1fr;gap:16px;padding:14px 0;border-bottom:1px solid var(--border)}.number-item strong{font-size:24px;color:var(--bright)}.slice-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}.stack{display:grid;gap:20px}.note-card{background:#fff;border-radius:16px;padding:24px;border:1px solid var(--border)}.chapter-band{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border-radius:16px;border:1px solid var(--border);overflow:hidden}.chapter-band article{padding:24px;border-right:1px solid var(--border)}.chapter-band article:last-child{border-right:0}.stagger{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px;align-items:start}.stagger article:nth-child(2){margin-top:40px}.stagger article:nth-child(3){margin-top:16px}.visual-grid{display:grid;grid-template-columns:1.4fr .8fr;gap:20px}.visual-side{display:grid;gap:20px}.index-list{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:20px}.index-list a{background:#fff;border:1px solid var(--border);padding:18px;border-radius:12px;font-weight:700}.longread{display:grid;grid-template-columns:.85fr 1.15fr;gap:32px;align-items:center}.wide-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.prose{max-width:900px}.prose p{margin-bottom:1.25em}.prose h2{margin-top:2em}.feature-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature-list article{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px}.article-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.article-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:26px}.article-card p{color:var(--muted)}.route-layout{display:grid;grid-template-columns:1fr 300px;gap:32px;align-items:start}.side-note{position:sticky;top:170px;background:var(--sand);border-radius:16px;padding:22px}.timeline{position:relative;padding-left:30px}.timeline:before{content:"";position:absolute;left:8px;top:8px;bottom:8px;width:2px;background:var(--pale)}.timeline article{position:relative;margin-bottom:26px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px}.timeline article:before{content:"";position:absolute;left:-28px;top:28px;width:12px;height:12px;background:var(--brand);border-radius:50%;box-shadow:0 0 0 5px var(--pale)}.offset-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.offset-grid article:nth-child(even){margin-top:40px}.checklist{display:grid;gap:18px}.checklist section{background:#fff;border:1px solid var(--border);border-radius:14px;padding:24px}.checklist ul{padding-left:1.2em}.gallery-corridor{columns:2;column-gap:20px}.gallery-item{break-inside:avoid;background:#fff;border:1px solid var(--border);border-radius:14px;padding:14px;margin-bottom:20px}.gallery-item p{padding:12px 4px 0;color:var(--muted)}.process{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:step}.process article{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px}.process article:before{counter-increment:step;content:"0" counter(step);display:block;color:var(--bright);font-weight:800;font-size:24px;margin-bottom:8px}.faq-list{display:grid;gap:14px}.faq-list details{background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px 20px}.faq-list summary{cursor:pointer;color:var(--title);font-weight:800}.faq-list p{padding-top:12px;margin:0}.site-footer{background:#0E3A46;color:#D7E9EC;padding:50px 0 78px}.footer-grid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:28px}.footer-grid h3{color:#fff}.footer-grid a{display:block;margin:7px 0;color:#D7E9EC}.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:6px}.footer-brand strong{font-size:20px;color:#fff}.footer-brand p{max-width:330px;color:#bcd5da;margin-top:12px}.copyright{border-top:1px solid rgba(255,255,255,.14);padding-top:18px;margin-top:30px;color:#bcd5da}.overlay{position:fixed;inset:0;background:rgba(5,37,43,.45);z-index:90;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.show{opacity:1;visibility:visible;pointer-events:auto}.drawer{position:fixed;z-index:100;right:0;top:0;bottom:0;width:min(430px,88vw);background:#F5FAFB;padding:24px;overflow:auto;transform:translateX(100%);visibility:hidden;pointer-events:none;transition:.25s}.drawer.open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head,.search-head{display:flex;justify-content:space-between;align-items:flex-start;gap:20px}.icon-btn{width:44px;height:44px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--title);font-size:24px;cursor:pointer}.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:20px}.drawer-grid section{background:#fff;border:1px solid var(--border);border-radius:14px;padding:14px}.drawer-grid a{display:block;padding:10px 0;border-bottom:1px solid var(--border)}.drawer-grid a:last-child{border-bottom:0}.drawer-grid b{display:block;color:var(--title)}.drawer-grid span{display:block;color:var(--muted);font-size:12px;line-height:1.5;margin-top:2px}.search-panel{position:fixed;z-index:101;top:92px;left:50%;transform:translate(-50%,-10px);width:min(1000px,calc(100% - 40px));background:#fff;border:1px solid var(--border);border-radius:16px;padding:26px;box-shadow:var(--shadow);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.search-panel.open{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0)}.search-box{margin:18px 0;display:flex;align-items:center;gap:12px;background:var(--soft);border-radius:12px;padding:12px}.search-box input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:16px}.search-box span{font-size:13px;color:var(--muted)}.search-links{display:flex;gap:10px;flex-wrap:wrap}.search-links a{padding:10px 14px;border:1px solid var(--border);border-radius:10px;color:var(--deepsea);font-weight:700}.mobile-bottom{display:none}.page-intro{padding:20px 0 30px}.page-intro p{max-width:800px;font-size:17px;color:var(--muted)}.quote-block{padding:26px;border-left:4px solid var(--bright);background:#fff;border-radius:0 14px 14px 0;margin:24px 0}.tagline{display:inline-block;background:var(--pale);color:var(--deepsea);padding:5px 10px;border-radius:8px;font-size:13px;font-weight:700}.list-links{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.list-links a{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px;font-weight:700}.notice{background:var(--sand);border:1px solid rgba(140,122,92,.15);padding:18px;border-radius:14px}
@media(max-width:900px){:root{--header:112px}.shell{width:min(var(--max),calc(100% - 32px))}.primary-nav{display:none}.brand-inner{gap:12px}.brand-logo{min-width:0;flex:1}.header-actions .small-cta{display:none}.context-nav{display:none}.mobile-cats{display:flex;height:44px;background:#fff;border-bottom:1px solid var(--border);overflow-x:auto;padding:0 12px;scrollbar-width:none}.mobile-cats::-webkit-scrollbar{display:none}.mobile-cats a{flex:0 0 auto;min-width:70px;padding:0 13px;border-radius:0}.site-main{padding-top:calc(var(--header) + 22px)}.editor-grid,.editor-grid.second,.split,.slice-grid,.stagger,.visual-grid,.longread,.wide-pair,.service-grid,.feature-list,.article-grid,.route-layout,.offset-grid,.process{grid-template-columns:1fr}.stagger article:nth-child(2),.stagger article:nth-child(3),.offset-grid article:nth-child(even){margin-top:0}.chapter-band{grid-template-columns:1fr 1fr}.chapter-band article:nth-child(2){border-right:0}.chapter-band article{border-bottom:1px solid var(--border)}.index-list{grid-template-columns:1fr 1fr}.side-note{position:static}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.gallery-corridor{columns:1}.mobile-bottom{position:fixed;z-index:70;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;background:#fff;border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{min-height:52px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}.mobile-bottom a.active{background:var(--brand);color:#fff}.site-footer{padding-bottom:calc(78px + env(safe-area-inset-bottom))}.search-panel{top:76px}.section{padding:42px 0}.section-head{align-items:flex-start;flex-direction:column}.full-media,.feature-media{width:100%}.drawer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.tide-inner{width:calc(100% - 24px)}.tide-inner div a{display:none}.brand-bar{height:64px}.brand-logo img{height:30px}.logo-fallback{font-size:14px}.header-actions{gap:6px}.small-ghost{padding:0 12px}.mobile-cats{height:44px}.chapter-band,.drawer-grid,.index-list,.footer-grid,.list-links{grid-template-columns:1fr}.search-box{align-items:stretch;flex-direction:column}.search-panel{width:calc(100% - 32px);padding:18px}.section{padding:36px 0}.mag-card,.article-card,.note-card{padding:20px}.button-row .btn{width:100%}.footer-brand{grid-column:auto}}
:focus-visible{outline:3px solid rgba(43,179,196,.45);outline-offset:3px}a:hover,.text-button:hover{opacity:.82}