@charset "UTF-8";
:root{--bg:#f5fbff;--paper:#fff;--soft:#eaf7fc;--soft2:#dff5fb;--cyan:#25c8d1;--sky:#25b6e8;--blue:#1787db;--deep:#174b78;--heading:#173b60;--body:#2d4359;--muted:#687f93;--line:#dcebf3;--footer:#123653;--radius:16px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;overflow-x:hidden}body.drawer-open{overflow:hidden}a{color:var(--deep);text-decoration:none}a:hover{color:var(--blue)}button{font:inherit}img{max-width:100%;height:auto}.container{width:min(1160px,calc(100% - 48px));margin-inline:auto}.skip{position:absolute;left:-9999px;top:8px;background:#fff;z-index:1000;padding:8px}.skip:focus{left:8px}a:focus-visible,button:focus-visible{outline:3px solid var(--blue);outline-offset:3px}.site-header{position:sticky;top:0;z-index:90;background:#fff;box-shadow:0 1px 0 var(--line)}.header-inner{height:72px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;justify-content:flex-start;flex-shrink:0;min-width:150px;max-width:180px}.brand img{width:auto;height:auto;max-height:38px;max-width:170px;object-fit:contain}.brand-fallback{font-size:24px;font-weight:900;white-space:nowrap;color:var(--heading);letter-spacing:.04em}.brand-fallback span{color:var(--cyan)}.desktop-nav{display:flex;gap:clamp(10px,1.45vw,22px);align-items:center;justify-content:center;flex:1;white-space:nowrap}.desktop-nav a{font-size:14px;font-weight:700;padding:24px 0 20px;border-bottom:3px solid transparent}.desktop-nav a:hover,.desktop-nav a.active{color:var(--blue);border-bottom-color:var(--cyan)}.main-btn{display:inline-flex;align-items:center;justify-content:center;min-width:82px;height:42px;padding:0 20px;border-radius:999px;background:linear-gradient(110deg,#25c8d1,#25b6e8,#1787db);color:#fff;font-weight:700;text-decoration:none;white-space:nowrap;box-shadow:0 6px 18px #1787db2e}.main-btn:hover{color:#fff;filter:brightness(.96)}.menu-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;flex-direction:column;gap:5px;border:0;background:transparent;cursor:pointer}.menu-toggle span{width:21px;height:2px;background:var(--deep)}.drawer-overlay{position:fixed;inset:0;z-index:95;background:#0c30577a;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.drawer-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.mobile-drawer{position:fixed;z-index:96;inset:0 auto 0 0;width:min(86vw,340px);background:#fff;box-shadow:8px 0 32px #0a284835;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .25s,visibility .25s;overflow-y:auto}.mobile-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-top{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line)}.drawer-brand{font-weight:900;font-size:21px}.drawer-brand small{display:block;line-height:1.2;letter-spacing:.17em;font-size:10px;color:var(--muted)}.drawer-close{font-size:30px;line-height:1;border:0;background:transparent;color:var(--deep);cursor:pointer}.drawer-group{padding:13px 20px;border-bottom:1px solid var(--line)}.drawer-group strong{display:block;font-size:13px;color:var(--blue);letter-spacing:.07em;margin-bottom:4px}.drawer-group a{display:block;padding:7px 0;font-size:15px}.bottom-nav{display:none}.eyebrow{display:block;margin-bottom:8px;letter-spacing:.13em;text-transform:uppercase;font-size:12px;font-weight:800;color:var(--blue)}h1,h2,h3{color:var(--heading);line-height:1.38;letter-spacing:.005em}h1{font-size:clamp(30px,3.4vw,40px);margin:0 0 18px}h2{font-size:25px;margin:0 0 18px}h3{font-size:19px;margin:0 0 10px}p{margin:0 0 17px}.lead{font-size:17px;line-height:1.85;color:#49647d}.hero{background:linear-gradient(115deg,#dff5fb 0%,#f1fbff 57%,#e7f6ff 100%);border-bottom:1px solid var(--line)}.hero-inner{padding:60px 0;display:grid;grid-template-columns:1.12fr .88fr;align-items:center;gap:48px}.hero p{max-width:630px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.ghost-btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;border-radius:999px;border:1px solid #8ac9ea;padding:0 20px;font-weight:700}.media{width:100%;display:flex;align-items:center;justify-content:center;overflow:hidden;background:var(--soft);border-radius:14px;min-height:175px}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media--missing{display:flex;gap:12px;flex-direction:column;text-align:center;font-size:14px;color:#537b98;background:linear-gradient(140deg,#dbf4fb,#e8f5ff);border:1px solid #c4e7f4;padding:24px}.placeholder-symbol{font-size:36px;color:#55bbdc}.hero-media{height:290px}.feature-media{height:230px}.card-media{height:172px}.narrow-media{height:205px}.portrait-media{height:310px;max-width:360px}.content-section{padding:45px 0}.content-section+.content-section{padding-top:10px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:23px}.section-head h2{margin:0}.section-head p{margin:5px 0 0;max-width:670px}.text-link{font-weight:800;font-size:14px;white-space:nowrap}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.topic-card,.panel,.note-card,.article-card,.index-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:22px}.topic-card{transition:transform .2s,border-color .2s}.topic-card:hover{transform:translateY(-3px);border-color:#9edbea}.topic-card .number{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.14em}.topic-card h3{margin:8px 0 8px}.topic-card p{font-size:14px;color:var(--muted);margin:0}.story-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}.story-main{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.story-main-body{padding:25px}.story-side{display:grid;gap:16px}.story-side .panel{padding:24px}.story-side p{font-size:14px;margin:0;color:var(--muted)}.muted{color:var(--muted)}.split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.split.reverse>:first-child{order:2}.feature-band{background:#e8f6fd;border-block:1px solid var(--line)}.kicker{font-size:12px;font-weight:800;color:var(--blue);text-transform:uppercase;letter-spacing:.12em}.article-shell{padding:42px 0 62px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px}.breadcrumb a{color:var(--muted)}.page-heading{max-width:840px;margin:0 0 30px}.page-heading h1{font-size:clamp(26px,3.1vw,34px)}.page-heading .lead{margin-bottom:0}.article-body{max-width:820px;font-size:16.5px;line-height:1.82}.article-body h2{margin:38px 0 15px}.article-body h3{margin:27px 0 10px}.article-body p{margin-bottom:17px}.article-body ul,.article-body ol{padding-left:24px;margin:12px 0 22px}.article-body li{margin-bottom:9px}.article-body .panel{margin:23px 0}.wide-content{max-width:1050px}.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.three-col{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.side-by-side{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin:25px 0}.side-by-side>div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}.table-wrap{max-width:100%;overflow-x:auto;margin:24px 0}table{border-collapse:collapse;width:100%;min-width:540px;background:#fff;font-size:15px}th,td{border:1px solid var(--line);padding:13px 15px;text-align:left;vertical-align:top}th{background:#e7f6fc;color:var(--heading)}.quote{border-left:4px solid var(--cyan);background:#eaf7fc;padding:18px 22px;margin:24px 0;color:var(--deep)}.steps{counter-reset:step;padding:0!important;list-style:none}.steps li{position:relative;counter-increment:step;margin:0 0 17px;padding:17px 20px 17px 66px;background:#fff;border:1px solid var(--line);border-radius:12px}.steps li:before{content:counter(step);position:absolute;left:18px;top:17px;width:29px;height:29px;line-height:29px;text-align:center;border-radius:50%;background:var(--soft2);color:var(--blue);font-weight:800}.related{margin-top:44px;padding-top:27px;border-top:1px solid var(--line)}.related h2{font-size:21px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.related-grid a{display:block;border:1px solid var(--line);background:#fff;border-radius:12px;padding:16px;font-weight:700;font-size:14px}.tag-list{display:flex;flex-wrap:wrap;gap:9px}.tag-list a,.tag{display:inline-block;background:#dff5fb;color:var(--deep);border-radius:999px;padding:5px 13px;font-size:13px;font-weight:700}.subnav{display:flex;flex-wrap:wrap;gap:10px;margin:25px 0}.subnav a{padding:8px 14px;border-radius:30px;background:#fff;border:1px solid var(--line);font-size:14px;font-weight:700}.gallery-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.gallery-row article{background:#fff;padding:18px;border:1px solid var(--line);border-radius:14px}.gallery-row .media{height:195px;margin-bottom:14px}.gallery-row p{font-size:14px;color:var(--muted);margin:0}.faq-item{padding:17px 0;border-bottom:1px solid var(--line)}.faq-item h3{margin:0 0 6px}.faq-item p{margin:0}.site-footer{background:var(--footer);color:#eaf7ff;margin-top:32px;padding:45px 0 18px;font-size:14px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:45px}.footer-brand{font-size:25px;font-weight:900;color:white}.footer-brand span{font-size:11px;letter-spacing:.14em;margin-left:8px}.site-footer a{color:#eaf7ff}.site-footer a:hover{color:#7be1ee}.site-footer nav{display:flex;flex-direction:column;align-items:start;gap:8px}.site-footer nav strong{font-size:15px;margin-bottom:7px}.site-footer p{margin:8px 0}.footer-note{max-width:510px;opacity:.82}.footer-bottom{border-top:1px solid #ffffff29;margin-top:32px;padding-top:15px;display:flex;justify-content:space-between;gap:15px;font-size:12px;opacity:.76}.back-top{position:fixed;right:20px;bottom:23px;width:42px;height:42px;border:0;border-radius:50%;background:var(--blue);color:#fff;box-shadow:0 5px 22px #174b783d;cursor:pointer;opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s;z-index:70}.back-top.visible{opacity:1;visibility:visible}@media(max-width:1100px){.desktop-nav{gap:10px}.desktop-nav a{font-size:13px}.brand{min-width:120px}.header-inner{gap:13px}}@media(max-width:980px){.desktop-nav{display:none}.menu-toggle{display:flex}.header-inner{height:60px;justify-content:space-between;position:relative}.brand{position:absolute;left:50%;transform:translateX(-50%);justify-content:center;max-width:145px;min-width:0}.brand img{max-width:145px;max-height:30px}.brand-fallback{font-size:20px}.header-cta{height:39px;padding:0 13px;font-size:13px}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}.hero-inner{gap:28px}}@media(max-width:700px){body{font-size:15px}.container{width:calc(100% - 32px)}.hero-inner{padding:28px 0 35px;grid-template-columns:1fr;gap:21px}.hero-inner>.hero-copy{order:2}.hero-inner>.hero-media{order:1}.hero-media{height:205px}h1{font-size:29px}.page-heading h1{font-size:27px}h2{font-size:21px}h3{font-size:18px}.lead{font-size:15.5px}.content-section{padding:30px 0}.content-section+.content-section{padding-top:5px}.topic-grid,.three-col{grid-template-columns:1fr 1fr;gap:12px}.topic-card,.panel,.note-card,.article-card,.index-card{padding:16px}.story-grid,.split,.side-by-side{grid-template-columns:1fr;gap:17px}.split.reverse>:first-child{order:0}.story-main-body{padding:18px}.feature-media{height:195px}.article-shell{padding:27px 0 40px}.article-body{font-size:15.5px}.article-body h2{margin-top:30px}.related-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-grid>div{grid-column:1/-1}.footer-bottom{display:block}.bottom-nav{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:80;background:#fff;border-top:1px solid var(--line);height:58px;align-items:center;justify-content:space-around;padding-bottom:env(safe-area-inset-bottom)}.bottom-nav a{color:var(--deep);font-size:13px;font-weight:800;padding:8px}.bottom-nav a.active{color:var(--blue)}.site-footer{padding-bottom:82px}.back-top{bottom:73px;right:14px}.section-head{align-items:start}.section-head .text-link{font-size:13px}.gallery-row{gap:12px}.gallery-row article{padding:12px}.gallery-row .media{height:146px}.portrait-media{height:270px}}@media(max-width:390px){.topic-grid,.three-col,.gallery-row{grid-template-columns:1fr}.header-cta{padding:0 10px;min-width:76px}.menu-toggle{width:35px}.brand-fallback{font-size:18px}.media--missing{min-height:120px}.hero-media{height:175px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}
