:root{
  --primary:#4A9BD4;--primary-2:#6DB7E6;--sky:#8CCCF0;--sky-light:#CBE9F8;--sky-soft:#EDF8FD;
  --cream:#FFF9EE;--cream-2:#FFF4DF;--cream-3:#FDFBF6;--navy:#17344A;--navy-2:#244A64;--navy-soft:#4F6D80;
  --accent:#EF8E68;--accent-2:#F2B36F;--accent-soft:#FFF0E8;--bg:#FFFDF8;--bg-blue:#F3FAFE;--bg-cream:#FFF9EE;
  --surface:#FFFFFF;--surface-blue:#F8FCFF;--surface-cream:#FFFDF8;--text:#203542;--text-2:#5E7481;--text-3:#8A9AA3;
  --line:rgba(74,155,212,.12);--line-strong:rgba(74,155,212,.24);--line-warm:rgba(239,142,104,.14);
  --shadow:0 8px 28px rgba(31,88,124,.08);--shadow-hover:0 16px 42px rgba(31,88,124,.14);
  --radius:12px;--radius-card:18px;--radius-large:26px;--radius-pill:999px;--wrap:1320px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;line-height:1.65}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}button,input{font:inherit}.wrap{width:min(var(--wrap),calc(100% - 40px));margin-inline:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:12px;top:-80px;z-index:100;background:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}.top-note{background:var(--cream-2);border-bottom:1px solid var(--line-warm);font-size:13px;color:var(--navy-2)}.top-note .wrap{padding:7px 0}.top-note a{text-decoration:underline}.site-header{position:sticky;top:0;z-index:40;background:rgba(255,249,238,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(31,88,124,.04)}.header-inner{min-height:72px;display:flex;align-items:center;gap:28px}.brand{display:inline-flex;align-items:center;gap:10px;min-width:max-content}.brand img{width:42px;height:42px;border-radius:14px;object-fit:cover}.brand span{display:flex;flex-direction:column;line-height:1.15}.brand b{font-size:19px;color:var(--navy)}.brand small{font-size:9px;letter-spacing:.11em;color:var(--navy-soft)}.desktop-nav{display:flex;align-items:center;gap:22px;margin-left:auto}.desktop-nav a{font-size:15px;color:var(--navy-2);padding:24px 0 22px;border-bottom:2px solid transparent}.desktop-nav a:hover,.desktop-nav a[aria-current="page"]{color:var(--primary);border-color:var(--primary)}.header-actions{display:flex;align-items:center;gap:10px}.icon-btn,.menu-toggle,.header-link{border:0;background:transparent;color:var(--navy-2);padding:9px 10px;border-radius:10px;cursor:pointer}.icon-btn:hover,.menu-toggle:hover,.header-link:hover{background:var(--sky-soft)}.menu-toggle{display:none}.mobile-menu{background:var(--surface);border-top:1px solid var(--line);padding:14px 0}.mobile-menu[hidden]{display:none!important}.mobile-menu-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.mobile-menu a{background:var(--surface-blue);padding:12px;border-radius:12px}.search-modal{display:none;position:fixed;inset:0;z-index:90;background:rgba(15,42,61,.48);padding:7vh 18px;align-items:flex-start;justify-content:center}.search-modal.is-open{display:flex}.search-modal[hidden]{display:none!important}.search-dialog{width:min(760px,100%);background:var(--cream);border:1px solid rgba(255,255,255,.7);border-radius:28px;box-shadow:0 30px 80px rgba(15,42,61,.25);padding:28px}.search-dialog-head{display:flex;justify-content:space-between;gap:24px}.search-dialog-head h2{margin:4px 0 0;font-size:clamp(24px,4vw,36px);line-height:1.2}.search-close{border:0;background:#fff;width:42px;height:42px;border-radius:50%;font-size:26px;cursor:pointer}.search-form{display:grid;grid-template-columns:1fr auto;gap:10px;margin-top:26px}.search-form input{min-width:0;border:1px solid var(--line-strong);background:#fff;border-radius:14px;padding:14px 16px;outline:none}.search-form input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(74,155,212,.12)}.search-suggestions{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;color:var(--text-2);font-size:14px}.search-suggestions a{padding:4px 9px;border-radius:999px;background:#fff}body.search-open{overflow:hidden}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;border-radius:12px;border:1px solid transparent;font-weight:700;cursor:pointer}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#3e8fc8}.btn-soft{background:var(--cream);border-color:var(--line-strong);color:var(--navy)}.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--primary)}.text-link{color:var(--primary);font-weight:700}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--primary)}.section{padding:72px 0}.section.compact{padding:48px 0}.section.alt{background:var(--bg-blue)}.section.cream{background:var(--cream)}.section.dark{background:var(--navy);color:#fff}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:28px}.section-head h2{font-size:clamp(28px,4vw,44px);line-height:1.15;margin:5px 0 8px}.section-head p{margin:0;max-width:720px;color:var(--text-2)}.dark .section-head p{color:#c9d9e3}.page-hero{padding:68px 0;background:linear-gradient(135deg,var(--cream) 0%,var(--sky-soft) 58%,#fff 100%);overflow:hidden}.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(320px,5fr);gap:48px;align-items:center}.hero-copy h1{font-size:clamp(42px,6vw,76px);line-height:1.04;letter-spacing:-.04em;margin:10px 0 22px;color:var(--navy)}.hero-copy>p{font-size:18px;color:var(--text-2);max-width:720px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.hero-media{position:relative}.hero-media img{aspect-ratio:4/3;width:100%;object-fit:cover;border-radius:34px;box-shadow:var(--shadow)}.video-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.video-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.video-card{min-width:0}.video-thumb{position:relative;display:block;overflow:hidden;border-radius:18px;background:var(--sky-soft);aspect-ratio:16/9}.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}.video-card:hover .video-thumb img{transform:scale(1.02)}.play-icon{position:absolute;left:14px;bottom:14px;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.9);color:var(--navy);font-size:13px;transition:transform .2s ease}.video-card:hover .play-icon{transform:scale(1.06)}.duration{position:absolute;right:10px;bottom:10px;background:rgba(15,42,61,.78);color:#fff;padding:3px 8px;border-radius:8px;font-size:12px}.card-body{padding:14px 2px 0}.card-kicker{display:flex;align-items:center;gap:7px;flex-wrap:wrap;color:var(--primary);font-size:12px;font-weight:700}.mini-tag{background:var(--sky-soft);color:var(--navy-soft);padding:2px 7px;border-radius:999px}.card-body h3{font-size:18px;line-height:1.38;margin:8px 0 7px}.card-body p{margin:0;color:var(--text-2);font-size:14px}.meta{display:flex;flex-wrap:wrap;gap:8px 14px;color:var(--text-3);font-size:12px;margin-top:10px}.live-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.live-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;overflow:hidden}.live-cover{position:relative;aspect-ratio:16/9;overflow:hidden}.live-cover img{width:100%;height:100%;object-fit:cover}.live-badge{position:absolute;left:12px;top:12px;background:var(--accent);color:#fff;font-weight:800;font-size:11px;padding:5px 9px;border-radius:999px}.live-card .card-body{padding:17px}.anchor-rail,.content-rail{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x proximity;padding-bottom:8px;scrollbar-width:thin}.anchor-card{min-width:300px;display:grid;grid-template-columns:86px 1fr;gap:14px;padding:16px;border-radius:18px;background:var(--surface-blue);border:1px solid var(--line);scroll-snap-align:start}.anchor-card img{width:86px;height:86px;border-radius:50%;object-fit:cover}.anchor-card h3{margin:0}.anchor-card p{margin:3px 0;color:var(--text-2);font-size:13px}.anchor-card small{color:var(--text-3)}.anchor-line{display:flex;align-items:center;justify-content:space-between;gap:8px}.status-dot{font-size:11px;padding:3px 8px;border-radius:999px;background:var(--accent-soft);color:#a65334}.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.topic-card{display:grid;grid-template-columns:48px 1fr;gap:14px;padding:20px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.56)}.topic-avatar{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:var(--sky-light);font-weight:800;color:var(--navy)}.topic-card h3{margin:4px 0 7px}.topic-card p{margin:0;color:var(--text-2)}.faq-list{display:grid;gap:10px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 18px}.faq-item summary{display:flex;justify-content:space-between;gap:20px;cursor:pointer;padding:16px 0;font-weight:700}.faq-answer{padding:0 0 16px;color:var(--text-2)}.faq-answer p{margin:0}.site-footer{background:var(--navy);color:#dbe6ec;padding:58px 0 90px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:34px}.footer-grid h2{font-size:14px;color:#fff;margin:0 0 12px}.footer-grid>div>a:not(.brand){display:block;margin:8px 0;color:#c5d5df;font-size:14px}.footer-brand p{max-width:390px;color:#b8cbd6}.brand.invert b,.brand.invert small{color:#fff}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:20px;font-size:12px;color:#96adbb}.mobile-bottom-nav{display:none}.back-top{position:fixed;right:22px;bottom:24px;width:44px;height:44px;border:0;border-radius:50%;background:var(--navy);color:#fff;box-shadow:var(--shadow);z-index:35;cursor:pointer}.chip-row{display:flex;flex-wrap:wrap;gap:10px}.chip{display:inline-flex;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px}.bento{display:grid;grid-template-columns:2fr 1fr 1fr;grid-template-rows:repeat(2,220px);gap:16px}.bento article{position:relative;overflow:hidden;border-radius:24px;min-height:0}.bento article:first-child{grid-row:1/3}.bento img{width:100%;height:100%;object-fit:cover}.bento-overlay{position:absolute;inset:auto 0 0;padding:26px;background:linear-gradient(transparent,rgba(15,42,61,.82));color:#fff}.ranking-list{display:grid;gap:0;counter-reset:rank}.ranking-item{counter-increment:rank;display:grid;grid-template-columns:52px 1fr auto;gap:14px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}.ranking-item:before{content:counter(rank,decimal-leading-zero);font-size:24px;font-weight:900;color:var(--primary)}.split-layout{display:grid;grid-template-columns:1.4fr .9fr;gap:30px}.feature-panel{padding:28px;background:var(--cream);border:1px solid var(--line-warm);border-radius:26px}.feature-panel h3{font-size:28px;margin:6px 0 12px}.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.stat-item{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)}.stat-item strong{display:block;font-size:28px;color:var(--primary)}.notice-box{padding:20px;border-radius:18px;background:var(--accent-soft);border-left:4px solid var(--accent)}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:step}.step{counter-increment:step;padding:20px;border-radius:18px;background:var(--surface-blue);border:1px solid var(--line)}.step:before{content:counter(step);display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--primary);color:#fff;font-weight:900;margin-bottom:12px}.prose-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.prose-block{padding:24px;border-radius:20px;background:#fff;border:1px solid var(--line)}.prose-block h3{margin-top:0}.prose-block p{color:var(--text-2)}
@media(max-width:1050px){.desktop-nav{display:none}.menu-toggle{display:inline-block}.video-grid{grid-template-columns:repeat(3,1fr)}.hero-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1.5fr repeat(2,1fr)}.bento{grid-template-columns:1.4fr 1fr;grid-template-rows:260px 220px 220px}.bento article:first-child{grid-row:1/3}.bento article:nth-child(4){grid-column:1/3}.stat-strip{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.wrap{width:min(100% - 26px,var(--wrap))}.top-note{font-size:12px}.header-inner{min-height:64px;gap:10px}.brand img{width:38px;height:38px}.brand b{font-size:17px}.header-link{display:none}.hero-grid{grid-template-columns:1fr}.hero-media{order:-1}.hero-copy h1{font-size:42px}.page-hero{padding:36px 0}.section{padding:52px 0}.section-head{align-items:flex-start;flex-direction:column;gap:8px}.video-grid,.video-grid.three{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.live-grid{grid-template-columns:1fr}.topic-grid{grid-template-columns:1fr}.video-card .card-body p{display:none}.card-body h3{font-size:15px}.split-layout,.prose-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/3}.footer-bottom{flex-direction:column}.mobile-bottom-nav{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:39;background:rgba(255,253,248,.95);backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:max(8px,env(safe-area-inset-bottom)) 8px 8px}.mobile-bottom-nav a{text-align:center;font-size:12px;padding:5px}.back-top{bottom:76px}.search-dialog{padding:20px}.search-form{grid-template-columns:1fr}.bento{grid-template-columns:1fr 1fr;grid-template-rows:230px 180px 180px}.bento article:first-child{grid-column:1/3;grid-row:auto}.bento article:nth-child(4){grid-column:1/3}.steps{grid-template-columns:1fr 1fr}.stat-strip{grid-template-columns:1fr 1fr}.mobile-menu-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.video-grid,.video-grid.three{grid-template-columns:1fr 1fr}.video-thumb{border-radius:14px}.video-card .meta{display:none}.video-card .card-kicker .mini-tag{display:none}.anchor-card{min-width:270px}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.steps{grid-template-columns:1fr}.bento{display:flex;overflow-x:auto}.bento article{min-width:82vw;height:240px}}
.dark .prose-block{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.14);color:#fff}
.dark .prose-block p{color:#c9d9e3}
.dark .feature-panel{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.14);color:#fff}
.dark .feature-panel p{color:#c9d9e3}
.dark .live-card{background:#fff;color:var(--text)}
.dark .live-card .card-body h3{color:var(--text)}