:root{--bg:#F6FAFC;--surface:#fff;--pale:#EAF6FA;--pale2:#EDF4F8;--cyan:#25C8D1;--blue:#1787DB;--deep:#174B78;--title:#183A56;--text:#31485D;--muted:#687D8E;--line:#DCE9F0;--footer:#123653;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;min-width:0;line-height:1.8}body.drawer-open{overflow:hidden}a{color:var(--deep);text-underline-offset:3px}a:hover{color:#0878B5}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #1685cf;outline-offset:3px}img{max-width:100%}button{font:inherit;cursor:pointer}.container{max-width:1180px;margin:auto;padding-left:28px;padding-right:28px}.skip-link{position:absolute;left:10px;top:-70px;z-index:999;background:white;padding:8px}.skip-link:focus{top:10px}.site-header{background:#fff;border-bottom:1px solid var(--line)}.utility-bar{height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:inline-flex;align-items:center;text-decoration:none;color:var(--title);min-width:0;font-size:24px}.brand-caption{margin:0 auto;font-size:14px;color:var(--muted);letter-spacing:.07em}.entry-button{display:inline-flex;justify-content:center;align-items:center;flex-shrink:0;padding:0 22px;height:44px;background:var(--deep);color:white;text-decoration:none;border-radius:9px;font-weight:bold}.entry-button:hover{background:#11638e;color:white}.channel-nav{background:var(--deep)}.channel-inner{display:flex;justify-content:space-between;gap:18px;overflow-x:auto;scrollbar-width:thin}.channel-inner a{display:inline-flex;align-items:center;min-height:48px;flex-shrink:0;text-decoration:none;color:#EAF7FF;font-size:14px;border-bottom:3px solid transparent;white-space:nowrap}.channel-inner a[aria-current=page]{border-bottom-color:#74EBED;font-weight:700;color:white}.menu-trigger{display:none;border:0;background:transparent;width:40px;height:40px;flex:0 0 40px;padding:11px 8px}.menu-trigger span{height:2px;background:var(--title);display:block;margin-bottom:5px}.quick-strip{background:#EAF6FA;border-bottom:1px solid var(--line)}.quick-strip-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:6px 22px;padding-top:10px;padding-bottom:10px;font-size:13px}.quick-strip span{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.quick-strip a{text-decoration:none}.quick-strip a:hover{text-decoration:underline}.mobile-drawer,.drawer-overlay{visibility:hidden;pointer-events:none}.drawer-overlay{position:fixed;inset:0;background:rgba(12,40,63,.55);z-index:100;opacity:0;transition:opacity .2s}.mobile-drawer{position:fixed;z-index:101;left:0;top:0;bottom:0;width:min(86vw,344px);background:white;transform:translateX(-102%);transition:transform 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0}.eyebrow{font-size:12px;letter-spacing:.13em;color:#087e9b;font-weight:700;text-transform:uppercase}.hero{display:grid;grid-template-columns:56fr 44fr;align-items:center;gap:40px;padding-top:50px;padding-bottom:50px}.hero-copy h1{font-size:40px;line-height:1.35;color:var(--title);margin:11px 0 20px;letter-spacing:-.025em}.hero-copy p{font-size:16px;max-width:630px;margin:0 0 12px}.actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:23px}.action{padding:10px 18px;text-decoration:none;border:1px solid var(--deep);border-radius:8px;font-weight:bold}.action--primary{background:var(--deep);color:white}.action--primary:hover{color:white;background:#11638e}h1,h2,h3{color:var(--title);line-height:1.4}h2{font-size:26px;margin:0 0 21px}h3{font-size:19px;margin:8px 0 12px}p{margin:0 0 16px}.section-heading{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:22px}.section-heading p{max-width:630px;color:var(--muted);font-size:14px}.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.topic-card{padding:22px;background:white;border:1px solid var(--line);border-radius:12px;min-width:0}.topic-card h3{font-size:17px;margin:0 0 8px}.topic-card p{font-size:14px;color:var(--muted);margin-bottom:10px}.topic-card a{font-size:14px;font-weight:bold}.editorial-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px}.editorial-lead{background:#EAF6FA;padding:30px;border-radius:13px}.editorial-side{display:grid;gap:14px}.info-panel{background:white;border:1px solid var(--line);border-radius:12px;padding:22px}.info-panel h3{margin:0 0 7px}.info-panel p:last-child,.editorial-lead p:last-child{margin-bottom:0}.split{display:grid;grid-template-columns:1.05fr 1fr;gap:36px;align-items:center}.split--reverse{grid-template-columns:1fr 1.05fr}.section--white .info-panel{background:var(--bg)}.triad{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.triad>article{border-top:3px solid var(--cyan);padding:18px 18px 5px;background:white}.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px;list-style:none;padding:0}.steps li{background:white;border:1px solid var(--line);padding:18px;border-radius:10px}.steps li:before{counter-increment:step;content:'0' counter(step);display:block;color:#0788a9;font-weight:bold;font-size:20px}.page-intro{padding:47px 0 24px}.page-intro h1{font-size:34px;max-width:850px;margin:8px 0 15px}.page-intro p{max-width:820px}.article-body{max-width:780px}.article-body p,.prose p{font-size:16px;line-height:1.85}.article-body h2{margin-top:35px}.wide-content{padding-bottom:45px}.compare-table{width:100%;border-collapse:collapse;background:white;font-size:15px}.compare-table th,.compare-table td{border:1px solid var(--line);padding:13px 15px;text-align:left;vertical-align:top}.compare-table th{background:var(--pale);color:var(--title)}.table-wrap{overflow-x:auto;max-width:100%;margin:20px 0 30px;border-radius:8px}.compare-table{min-width:550px}.mini-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.mini-grid>article{background:white;padding:22px;border:1px solid var(--line);border-radius:10px}.timeline{display:grid;gap:13px;padding-left:0;list-style:none;counter-reset:phase}.timeline li{display:grid;grid-template-columns:62px 1fr;gap:14px;align-items:start}.timeline li::before{counter-increment:phase;content:counter(phase,decimal-leading-zero);border-radius:50%;background:var(--pale);display:grid;place-items:center;height:50px;width:50px;font-weight:bold;color:#087e9b}.timeline h3{margin:0 0 5px}.two-col{display:grid;grid-template-columns:minmax(0,760px) minmax(0,240px);gap:44px}.sticky-aside{align-self:start;background:var(--pale);border-radius:12px;padding:20px}.sticky-aside 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var(--line)}.media--logo.media--missing{display:none}.gallery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.gallery-grid figure{margin:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:white;padding:14px}.gallery-grid figcaption{padding:12px 4px 3px;font-size:14px}.gallery-grid strong{display:block;color:var(--title);font-size:17px}.anchor-nav{display:flex;gap:11px;flex-wrap:wrap;margin:20px 0}.anchor-nav a{background:var(--pale);padding:7px 14px;border-radius:6px;text-decoration:none;font-weight:bold}.related{padding:26px 0 48px;border-top:1px solid var(--line)}.related h2{font-size:23px}.related-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.related-links a{border:1px solid var(--line);background:white;border-radius:9px;padding:14px;text-decoration:none}.faq details{background:white;border:1px solid var(--line);border-radius:8px;margin:10px 0;padding:0 17px}.faq summary{cursor:pointer;padding:13px 0;font-weight:bold;color:var(--title)}.faq details p{border-top:1px solid var(--line);padding-top:12px;font-size:15px}.site-footer{background:var(--footer);color:#EAF7FF;padding:42px 0 16px}.footer-layout{display:grid;grid-template-columns:1fr 1fr;gap:42px}.site-footer h2{color:white;font-size:22px}.site-footer small{font-size:11px;letter-spacing:.1em;display:block;font-weight:normal}.site-footer p{font-size:14px}.footer-note{color:#c1d8e5;max-width:500px}.site-footer nav{display:grid;grid-template-columns:repeat(2,1fr);align-content:start;gap:12px}.site-footer a{color:#EAF7FF;font-size:14px}.copyright{border-top:1px solid #426078;margin-top:35px;padding-top:14px;font-size:12px;color:#b6d1e0}.bottom-nav{display:none}.back-top{position:fixed;right:22px;bottom:24px;border:0;border-radius:50%;background:var(--deep);color:white;width:43px;height:43px;visibility:hidden;opacity:0;pointer-events:none;transition:opacity 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@media(max-width:760px){.container{padding-left:16px;padding-right:16px}.section{padding:34px 0}.hero{grid-template-columns:1fr;padding-top:35px;padding-bottom:35px}.hero-copy h1{font-size:30px}.hero .media{grid-row:2}.split,.split--reverse,.editorial-grid,.two-col,.footer-layout{grid-template-columns:1fr}.triad,.mini-grid{grid-template-columns:1fr}.steps{grid-template-columns:repeat(2,minmax(0,1fr))}.section-heading{display:block}.page-intro{padding:34px 0 18px}.page-intro h1{font-size:28px}.sticky-aside{order:2}.gallery-grid{grid-template-columns:1fr}.related-links{grid-template-columns:1fr}.footer-layout{gap:20px}.bottom-nav{position:fixed;z-index:30;bottom:0;left:0;right:0;display:grid;grid-template-columns:repeat(4,1fr);padding:6px 4px calc(6px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:white}.bottom-nav a{display:block;text-align:center;font-size:13px;padding:5px;text-decoration:none}.bottom-nav a[aria-current=page]{font-weight:bold;color:#0878b5}.site-footer{padding-bottom:85px}.back-top{bottom:88px;right:12px}h2{font-size:22px}h3{font-size:18px}}
@media(max-width:640px){.media--hero{height:200px}.media--feature{height:180px}.media--card{height:145px}.media--banner,.media--wide{height:150px}.media--mobile{height:290px;max-width:250px}.topic-grid{grid-template-columns:1fr}.topic-card{padding:17px}.hero-copy h1{font-size:28px}.page-intro h1{font-size:26px}.steps{grid-template-columns:1fr}.service-list{grid-template-columns:1fr}.quick-strip-inner{font-size:12px}.footer-layout nav{gap:8px}.brand{max-width:33vw}.brand strong{font-size:18px}}
@media(max-height:520px) and (max-width:760px){.bottom-nav{position:static}.site-footer{padding-bottom:20px}.back-top{bottom:15px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}