:root{--bg:#F4F7FA;--paper:#fff;--soft:#EAF1F6;--mint:#E9F8F8;--nav:#102E46;--nav2:#163C57;--teal:#13B8C5;--blue:#237BD3;--title:#18364B;--body:#344C60;--muted:#64798A;--line:#DCE6ED;--footer:#0B2539}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;overflow-x:hidden}a{color:#146DA8;text-underline-offset:3px}a:hover{color:#087F94}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--teal);outline-offset:3px}img{display:block;max-width:100%}.container{width:min(1200px,calc(100% - 56px));margin-inline:auto}h1,h2,h3{color:var(--title);line-height:1.38}h1{font-size:clamp(2rem,3vw,2.75rem);letter-spacing:-.025em;margin:0 0 20px}h2{font-size:clamp(1.45rem,2.1vw,1.75rem);margin:0 0 22px}h3{font-size:1.25rem;margin:0 0 12px}p{margin:0 0 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4px}.desktop-nav a[aria-current=page]{color:#fff;font-weight:800;background:#1C4862}.desktop-nav a[aria-current=page]:after{content:"";position:absolute;bottom:0;left:25%;right:25%;height:3px;background:var(--teal)}.desktop-nav a:hover{background:#214D68}.menu-toggle,.mobile-drawer,.menu-overlay,.no-js-nav{display:none}.skip-link{position:absolute;top:-100px;left:12px;background:#fff;padding:10px;z-index:100}.skip-link:focus{top:8px}.site-footer{background:var(--footer);color:#DCECF5;padding:50px 0 0;margin-top:68px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:54px}.site-footer h2{color:#fff;font-size:1.12rem}.site-footer p{font-size:.92rem;color:#DCECF5}.site-footer a{color:#DCECF5}.footer-brand{font-size:1.3rem;font-weight:800;text-decoration:none}.footer-brand small{font-size:.64rem;letter-spacing:.08em}.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.copyright{border-top:1px solid #315167;margin-top:40px;padding:16px 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#AEC8D6;color:#64798A;font-size:.82rem}.media-frame--hero.media-placeholder{min-height:205px}.media-frame--mobile.media-placeholder{min-height:230px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;align-items:start}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:23px}.split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:42px;align-items:center}.split.reverse{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr)}.split>*{min-width:0}.soft-panel{background:var(--soft);padding:28px;border-radius:14px}.mint-panel{background:var(--mint);padding:28px;border-radius:14px}.white-panel{background:#fff;border:1px solid var(--line);padding:24px;border-radius:12px}.dark-panel{background:var(--nav2);color:#E9F8FC;padding:32px;border-radius:14px}.dark-panel h2,.dark-panel h3{color:#fff}.dark-panel a{color:#9FEAF3}.section-rule{border-top:1px solid var(--line);padding-top:26px}.topic-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 38px}.topic-index article{padding:21px 0;border-top:1px solid var(--line)}.topic-index h3{font-size:1.17rem}.topic-index p{margin:0 0 8px}.topic-index a,.text-link{font-weight:700;text-decoration:none}.home-hero{background:linear-gradient(110deg,#F4F7FA,#E9F8F8);border-bottom:1px solid var(--line);padding:52px 0 48px}.home-hero .split{grid-template-columns:52fr 48fr}.home-hero h1{max-width:640px}.home-hero .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.feature-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px}.feature-grid .major{padding:30px;background:#fff;border-left:4px solid var(--teal)}.feature-grid .minor article{border-top:1px solid var(--line);padding:18px 0}.feature-grid .minor h3{font-size:1.1rem}.three-notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.three-notes>*{padding:22px;background:#fff;border:1px solid var(--line);border-radius:10px}.three-notes>*:nth-child(2){transform:translateY(14px)}.timeline{counter-reset:steps;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.timeline article{border-top:3px solid var(--teal);padding:15px;background:#fff}.timeline article:before{counter-increment:steps;content:'0' counter(steps);display:block;font-weight:800;color:#087E90;font-size:1.45rem}.article-layout{display:grid;grid-template-columns:minmax(0,760px) minmax(200px,1fr);gap:50px;align-items:start}.side-index{background:#fff;border-left:3px solid var(--teal);padding:22px}.side-index a{display:block;margin:8px 0}.article-body h2{margin-top:38px}.article-body h2:first-child{margin-top:0}.article-body h3{margin-top:24px}.prose-block{padding:23px 0;border-bottom:1px solid var(--line)}.table-scroll{width:100%;overflow-x:auto;border-radius:12px;border:1px solid var(--line);background:#fff}.data-table{border-collapse:collapse;width:100%;min-width:620px;text-align:left;font-size:.94rem}.data-table caption{text-align:left;font-size:.95rem;padding:15px 17px;font-weight:700;color:var(--title)}.data-table th{background:#EAF1F6;color:var(--title)}.data-table th,.data-table td{padding:13px 15px;border-bottom:1px solid var(--line);vertical-align:top}.data-table tr:last-child td{border-bottom:0}.anchor-nav{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.anchor-nav a{border:1px solid #c4dce7;background:#fff;border-radius:8px;padding:8px 15px;text-decoration:none;font-weight:700}.step-list{counter-reset:num;list-style:none;padding:0}.step-list li{position:relative;counter-increment:num;padding:15px 20px 15px 58px;border-bottom:1px solid var(--line);margin:0}.step-list li:before{content:counter(num);position:absolute;left:10px;top:15px;width:30px;height:30px;display:grid;place-items:center;background:var(--nav2);color:#fff;border-radius:50%;font-weight:700}.matrix{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.matrix article{background:#fff;border-top:4px solid var(--teal);padding:25px}.gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}.gallery figure{margin:0;min-width:0}.gallery figure:nth-child(even){padding-top:40px}.gallery figcaption{margin-top:14px}.gallery .media-frame{width:100%}.faq details{border-bottom:1px solid var(--line);padding:13px 0}.faq summary{cursor:pointer;font-weight:700;color:var(--title);padding:4px 0}.faq details p{padding:11px 0 0;margin:0}.related{margin:58px 0 0;padding:24px 0;border-top:2px solid #bed3dd}.related h2{font-size:1.35rem}.related-links{display:flex;flex-wrap:wrap;gap:10px}.related-links a{display:block;background:#fff;border:1px solid var(--line);padding:9px 16px;text-decoration:none;border-radius:8px;font-weight:700}.notice{background:var(--mint);border-left:4px solid #0b8f9b;padding:18px 22px}.service-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:38px;align-items:start}.service-layout .side-index{position:sticky;top:16px}.service-layout .side-index a{padding:4px 0}.service-content{min-width:0}.service-content section{margin-bottom:42px}.service-content section h2{padding-bottom:12px;border-bottom:1px solid var(--line)}.article-wide{max-width:960px}.quote{padding:24px 30px;background:var(--soft);border-left:4px solid var(--blue);margin:24px 0;font-size:1.05rem}.tag{display:inline-block;font-size:.8rem;color:#076F80;background:#D8F3F3;padding:2px 9px;border-radius:4px;margin-bottom:10px}.no-js-nav{display:block;max-height:0;overflow:hidden}.no-js-nav .container{display:flex;flex-wrap:wrap;gap:12px}.masthead-note{font-size:.86rem;color:var(--muted)}
@media(max-width:1100px){.container{width:calc(100% - 44px)}.split{gap:28px}.article-layout{gap:28px}.desktop-nav a{font-size:.85rem}}
@media(max-width:920px){.brand-bar__inner{height:62px;justify-content:space-between;gap:10px}.menu-toggle{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:40px;height:40px;flex-shrink:0;background:transparent;border:1px solid var(--line);border-radius:8px;cursor:pointer}.menu-toggle span{height:2px;width:19px;background:var(--title)}.brand{position:absolute;left:50%;transform:translateX(-50%);max-width:min(35vw,180px)}.brand .media-frame img{max-height:30px}.brand-tagline,.desktop-nav{display:none}.entry-button{margin-left:auto;min-height:40px;padding:7px 12px;font-size:.82rem}.mobile-drawer{display:block;position:fixed;z-index:51;left:0;top:0;bottom:0;width:min(86vw,340px);padding:22px;background:#fff;box-shadow:10px 0 35px #102e4622;transform:translateX(-105%);transition:transform .22s ease;overflow-y:auto;visibility:hidden}.mobile-drawer a{display:block;color:var(--title);text-decoration:none;padding:9px 6px;border-bottom:1px solid var(--line)}.mobile-drawer a:hover{color:#087E90}.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;font-size:1.2rem}.drawer-close{font-size:30px;border:0;background:transparent;color:var(--title);height:42px;width:42px;cursor:pointer}.drawer-label{text-transform:uppercase;color:var(--muted);font-weight:700;letter-spacing:.1em;font-size:.76rem;margin:22px 0 3px}.menu-overlay{display:block;position:fixed;inset:0;background:#061d2cb3;z-index:50;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s ease,visibility .2s}.drawer-open .mobile-drawer{transform:translateX(0);visibility:visible}.drawer-open .menu-overlay{visibility:visible;opacity:1;pointer-events:auto}.no-js-nav{display:block;max-height:none;overflow:visible;background:#f7fbfd;border-bottom:1px solid var(--line)}.no-js-nav .container{padding:6px 0;justify-content:center;gap:6px 14px}.no-js-nav a{font-size:.77rem;white-space:nowrap}.js-enabled .no-js-nav{display:none}.mobile-shortcuts{display:flex;gap:10px;justify-content:space-between;flex-wrap:wrap;padding-top:32px}.mobile-shortcuts a{text-decoration:none;font-size:.86rem;font-weight:700}.footer-grid{gap:26px}}
@media(max-width:760px){.container{width:calc(100% - 32px)}.split,.split.reverse,.grid-2,.article-layout,.service-layout,.gallery{grid-template-columns:1fr}.home-hero .split{grid-template-columns:1fr}.home-hero{padding:32px 0}.home-hero .media-frame{max-width:100%}.feature-grid{grid-template-columns:1fr}.three-notes,.matrix{grid-template-columns:1fr}.three-notes>*:nth-child(2){transform:none}.timeline{grid-template-columns:repeat(2,minmax(0,1fr))}.service-layout .side-index{position:static;order:2}.service-content{order:1}.gallery figure:nth-child(even){padding-top:0}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:span 2}.page-top{padding-top:30px}.section{margin-block:40px}}
@media(max-width:640px){body{font-size:15px;line-height:1.76}h1{font-size:clamp(1.7rem,7.3vw,2rem)}h2{font-size:clamp(1.3rem,5.4vw,1.44rem)}h3{font-size:1.08rem}.lead{font-size:1rem}.section{margin-block:34px}.soft-panel,.mint-panel,.dark-panel{padding:20px}.white-panel{padding:18px}.topic-index{grid-template-columns:1fr}.home-hero .actions{gap:9px}.button{font-size:.84rem;padding:8px 15px}.media-frame--hero{--media-limit:205px}.media-frame--feature{--media-limit:185px}.media-frame--card{--media-limit:145px}.media-frame--mobile{--media-limit:285px;max-width:250px}.media-frame--banner{--media-limit:135px}.timeline{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.footer-links{grid-template-columns:repeat(2,minmax(0,1fr))}.site-footer{padding-top:36px;margin-top:42px}.brand{max-width:37vw}.brand-fallback{font-size:14px}.brand-fallback small{font-size:8px}.entry-button{font-size:.75rem;padding:7px 10px}.matrix article{padding:18px}.gallery{gap:26px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}