:root{--base:#f6fafc;--surface:#fff;--soft:#eaf6fa;--soft2:#edf4f8;--cyan:#25c8d1;--sky:#25b6e8;--blue:#1787db;--sea:#174b78;--heading:#183a56;--text:#31485d;--muted:#687d8e;--line:#dce9f0;--footer:#123653;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--base);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}body.menu-open{overflow:hidden}a{color:var(--sea);text-decoration-thickness:1px;text-underline-offset:4px}a:hover{color:var(--blue)}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:3px}h1,h2,h3{color:var(--heading);line-height:1.38;margin:0 0 .6em}h1{font-size:clamp(27px,3.4vw,42px);letter-spacing:-.025em}h2{font-size:clamp(20px,2.1vw,27px)}h3{font-size:clamp(17px,1.7vw,21px)}p{margin:.5em 0 1.2em}ul,ol{padding-left:1.35em}li+li{margin-top:.4em}.container{width:min(calc(100% - 56px),var(--max));margin-inline:auto}.site-header{background:#fff;border-bottom:1px solid var(--line)}.toolbar{display:flex;align-items:center;gap:24px;min-height:72px}.brand{display:flex;align-items:center;text-decoration:none;min-width:0}.brand img{display:block;width:auto;height:auto;max-height:38px;max-width:min(260px,42vw);object-fit:contain}.brand__fallback{font-size:23px;font-weight:800;color:var(--heading);line-height:1.1}.brand__fallback small{font-size:9px;display:block;letter-spacing:.18em}.toolbar__motto{margin:auto;color:var(--muted);font-size:14px}.entry-button{display:inline-flex;justify-content:center;align-items:center;background:var(--sea);color:#fff;text-decoration:none;border-radius:9px;padding:8px 22px;min-height:42px;font-weight:bold;white-space:nowrap}.entry-button:hover{background:#176193;color:#fff}.channel-nav{background:var(--sea)}.channel-nav__inner{display:flex;align-items:stretch;justify-content:space-between;gap:8px}.channel-nav a{display:flex;align-items:center;justify-content:center;color:#effaff;text-decoration:none;white-space:nowrap;font-size:14px;font-weight:600;min-height:48px;padding:0 8px;border-bottom:3px solid transparent}.channel-nav a:hover,.channel-nav a[aria-current="page"]{border-bottom-color:var(--cyan);color:#fff}.menu-toggle{display:none}.skip-link{position:absolute;top:-100px;left:15px;z-index:200;background:#fff;padding:8px}.skip-link:focus{top:12px}.site-main{min-height:60vh}.section{padding-block:54px}.section--white{background:white}.section--tint{background:var(--soft)}.eyebrow{text-transform:uppercase;letter-spacing:.1em;color:#137f99;font-size:13px;font-weight:800;margin-bottom:10px}.lead{font-size:17px;color:var(--text);max-width:810px}.section-head{max-width:770px;margin-bottom:26px}.section-head p{color:var(--muted)}.hero{display:grid;grid-template-columns:minmax(0,56fr) minmax(0,44fr);gap:42px;align-items:center;padding-block:46px 52px}.hero h1{max-width:630px}.hero__text{max-width:660px}.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:9px 18px;background:var(--sea);color:#fff;text-decoration:none;font-weight:700;border-radius:9px}.btn:hover{background:var(--blue);color:white}.btn--outline{background:transparent;border:1px solid var(--blue);color:var(--sea)}.btn--outline:hover{color:white}.media{display:flex;justify-content:center;align-items:center;min-width:0;width:100%;overflow:hidden;border-radius:14px;background:var(--soft);padding:12px}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media__image--portrait{max-width:min(100%,290px)}.media__placeholder{width:100%;height:100%;border:1px dashed #c8dce6;border-radius:8px;background:linear-gradient(130deg,#eaf6fa,#f4f9fc)}.media--hero{height:clamp(250px,26vw,330px)}.media--feature{height:250px}.media--card{height:170px}.media--banner{height:220px}.media--mobile{height:350px;max-width:320px}.grid{display:grid;gap:20px}.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}.topic-card,.info-card,.mini-feature{padding:23px 25px;background:var(--surface);border:1px solid var(--line);border-radius:14px;min-width:0}.topic-card h3,.info-card h3{font-size:18px}.topic-card p,.info-card p{font-size:15px;color:var(--muted)}.topic-card a{font-weight:700}.topic-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.topic-grid>*:nth-child(n+5){grid-column:span 1}.editorial-split{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:26px}.feature-article{background:white;border-left:4px solid var(--cyan);padding:28px 30px;border-radius:0 14px 14px 0}.feature-article p{max-width:740px}.stack{display:grid;gap:16px}.mini-feature{padding:20px}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:40px}.split--wide{grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr)}.quickline{background:#fff;border-bottom:1px solid var(--line)}.quickline__inner{display:flex;gap:12px 30px;flex-wrap:wrap;align-items:center;padding-block:14px;font-size:14px}.quickline__inner strong{color:var(--heading)}.quickline__inner a{margin-right:10px}.step-line{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;counter-reset:step}.step-line>*{padding:20px;background:#fff;border-radius:12px;border:1px solid var(--line)}.step-line>*:before{counter-increment:step;content:counter(step,decimal-leading-zero);color:#0f8597;display:block;font-size:24px;font-weight:bold}.page-intro{padding:44px 0 18px;max-width:920px}.page-intro h1{font-size:clamp(25px,3vw,36px)}.page-intro .lead{font-size:16px}.article-shell{padding-bottom:60px}.reading{max-width:780px}.reading h2{margin-top:35px}.reading h3{margin-top:26px}.reading p{line-height:1.85}.reading ul{margin-bottom:20px}.table-scroll{max-width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:12px;margin:20px 0 26px;background:white}table{width:100%;border-collapse:collapse;min-width:520px;font-size:15px;text-align:left}th,td{padding:13px 17px;vertical-align:top;border-bottom:1px solid var(--line)}th{background:var(--soft2);color:var(--heading)}tr:last-child td{border-bottom:0}.callout{background:var(--soft);border-left:4px solid var(--cyan);padding:20px 24px;margin:22px 0;border-radius:0 10px 10px 0}.article-grid{display:grid;grid-template-columns:minmax(0,760px) minmax(0,240px);gap:35px;align-items:start}.aside-panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}.aside-panel h2{font-size:20px}.aside-panel dl{margin:0}.aside-panel dt{font-weight:700;margin-top:15px;color:var(--heading)}.aside-panel dd{margin:3px 0 0;color:var(--muted);font-size:14px}.anchor-menu{display:flex;flex-wrap:wrap;gap:9px;margin:16px 0 24px}.anchor-menu a{background:var(--soft);border:1px solid var(--line);padding:7px 13px;border-radius:7px;text-decoration:none;font-size:14px}.related{padding:34px 0 10px;border-top:1px solid var(--line);margin-top:38px}.related__links{display:flex;flex-wrap:wrap;gap:12px}.related__links a{display:block;padding:13px 17px;background:white;border:1px solid var(--line);border-radius:10px;text-decoration:none;font-weight:700}.timeline{counter-reset:stage;display:grid;gap:14px}.timeline>div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 22px}.timeline h3:before{counter-increment:stage;content:counter(stage,decimal-leading-zero) ' / ';color:#078b9c}.gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.gallery figure{margin:0;background:#fff;padding:15px;border-radius:12px;border:1px solid var(--line)}.gallery figcaption{padding:12px 5px 3px;color:var(--text);font-size:15px}.faq-list{max-width:900px}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 19px;margin:9px 0}.faq-list summary{cursor:pointer;font-weight:700;color:var(--heading)}.faq-list p{margin:10px 0 3px}.site-footer{background:var(--footer);color:#d9edf6;padding:48px 0 22px}.site-footer h2,.site-footer h3{color:#fff}.site-footer h2{font-size:22px}.site-footer h2 small{font-size:11px;font-weight:400;letter-spacing:.13em}.footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:7px 22px}.site-footer a{color:#eaf7ff}.footer-bottom{border-top:1px solid #ffffff24;margin-top:32px;padding-top:18px;font-size:13px;color:#d1e4ef}.footer-bottom p{margin-bottom:5px}.back-top{position:fixed;right:22px;bottom:20px;background:var(--sea);color:white;border:0;border-radius:50%;height:42px;width:42px;box-shadow:0 4px 16px #0002;opacity:0;pointer-events:none;transition:opacity .2s}.back-top.is-visible{opacity:1;pointer-events:auto}.bottom-nav,.drawer,.menu-overlay{display:none}.notice{font-size:14px;color:var(--muted);padding-top:18px}.page-divider{height:1px;background:var(--line);margin:30px 0}.inline-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.inline-points>div{padding:20px;background:var(--soft2);border-radius:12px}.inline-points h3{font-size:18px}.kicker{color:#087f92;font-weight:700}.service-map td:first-child{font-weight:700;white-space:nowrap}@media(max-width:1180px){.container{width:calc(100% - 44px)}}@media(max-width:980px){.toolbar{min-height:62px;justify-content:space-between;gap:12px}.toolbar__motto,.channel-nav{display:none}.menu-toggle{width:40px;height:40px;flex:none;border:1px solid var(--line);background:white;border-radius:9px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px}.menu-toggle span{width:19px;height:2px;background:var(--sea)}.brand{margin-inline:auto}.brand img{max-height:30px;max-width:min(200px,35vw)}.brand__fallback{font-size:19px}.entry-button{min-height:40px;padding:5px 12px;font-size:13px}.menu-overlay{display:block;position:fixed;inset:0;background:#071e31a8;z-index:99;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.menu-overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}.drawer{display:block;position:fixed;top:0;left:0;bottom:0;width:min(86vw,344px);padding:20px;background:#fff;box-shadow:8px 0 24px #0002;z-index:100;overflow-y:auto;visibility:hidden;transform:translateX(-105%);transition:transform .24s,visibility .24s}.drawer.is-open{visibility:visible;transform:translateX(0)}.drawer__heading{display:flex;align-items:center;justify-content:space-between;color:var(--heading);font-size:20px;border-bottom:1px solid var(--line);padding-bottom:12px}.menu-close{background:transparent;border:0;font-size:32px;color:var(--sea);width:40px;height:40px}.drawer__group{font-weight:700;color:#0b8295;font-size:13px;margin:22px 0 7px}.drawer nav a{display:block;text-decoration:none;color:var(--heading);border-bottom:1px solid var(--line);padding:10px 6px}.hero{gap:24px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-grid{grid-template-columns:minmax(0,1fr)}.aside-panel{max-width:780px}}@media(max-width:760px){.container{width:calc(100% - 32px)}.section{padding-block:36px}.hero{grid-template-columns:1fr;padding-block:30px;gap:22px}.hero .media{order:2}.hero__text{order:1}.editorial-split,.split,.split--wide,.footer-grid{grid-template-columns:1fr}.step-line{grid-template-columns:repeat(2,minmax(0,1fr))}.grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}.inline-points{grid-template-columns:1fr}.page-intro{padding-top:30px}.gallery{grid-template-columns:1fr}.footer-grid{gap:24px}.site-footer{padding-bottom:85px}.bottom-nav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;z-index:60;background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -3px 18px #12365312}.bottom-nav a{text-align:center;text-decoration:none;color:var(--heading);padding:9px 5px;min-height:49px;font-size:13px;font-weight:700}.bottom-nav a[aria-current="page"]{color:var(--blue);border-top:2px solid var(--cyan)}.back-top{bottom:75px}.site-main{padding-bottom:8px}}@media(max-width:640px){.hero h1{font-size:30px}.lead{font-size:15px}.section h2{font-size:22px}.media--hero{height:200px}.media--feature{height:180px}.media--card{height:145px}.media--banner{height:150px}.media--mobile{height:290px;max-width:250px}.topic-card,.info-card{padding:16px}.topic-grid,.grid--2,.grid--3,.grid--4{grid-template-columns:1fr}.step-line{grid-template-columns:1fr}.feature-article{padding:20px}.quickline__inner{gap:6px 16px}.toolbar{gap:7px}.footer-links{grid-template-columns:1fr 1fr}.reading p{font-size:15px}.table-scroll{margin-inline:-2px}}@media(max-height:520px) and (max-width:760px){.bottom-nav{position:static}.site-footer{padding-bottom:18px}.back-top{bottom:20px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}
