: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,sans-serif;line-height:1.6}body.search-open{overflow:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input{font:inherit}.wrap{width:min(var(--wrap),calc(100% - 40px));margin-inline:auto}.skip-link{position:fixed;left:12px;top:12px;z-index:9999;transform:translateY(-160%);background:white;padding:10px 14px;border-radius:10px}.skip-link:focus{transform:none}.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}
.top-note{background:var(--navy);color:#e9f7ff;font-size:13px}.top-note .wrap{display:flex;justify-content:space-between;gap:20px;padding:8px 0}.top-note a{color:#fff;text-decoration:underline}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,249,238,.94);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;gap:24px;min-height:72px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);white-space:nowrap}.brand img{width:46px;height:34px;object-fit:cover;border-radius:10px}.main-nav{display:flex;align-items:center;gap:4px;flex:1}.main-nav a,.header-link,.icon-btn,.menu-btn{border:0;background:transparent;padding:10px 12px;border-radius:12px;color:var(--navy-2);cursor:pointer}.main-nav a:hover,.main-nav a.active,.header-link:hover,.icon-btn:hover,.menu-btn:hover{background:var(--sky-soft);color:var(--primary)}.header-tools{display:flex;align-items:center;gap:4px}.mega-menu{background:var(--surface);border-top:1px solid var(--line);box-shadow:var(--shadow)}.mega-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;padding:22px 0}.mega-grid a{padding:12px 14px;background:var(--surface-blue);border-radius:12px}.mega-grid a:hover{background:var(--cream)}
.search-modal{display:none;position:fixed;inset:0;z-index:1000;background:rgba(15,42,61,.48);padding:24px;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%);margin-top:10vh;background:var(--cream-3);border-radius:28px;padding:34px;box-shadow:0 24px 80px rgba(15,42,61,.28);position:relative}.search-close{position:absolute;right:18px;top:18px;width:42px;height:42px;border:1px solid var(--line-strong);border-radius:50%;background:white;cursor:pointer;font-size:24px}.search-dialog h2{font-size:clamp(26px,4vw,42px);margin:8px 0 18px}.search-box{display:flex;gap:10px}.search-box input{min-width:0;flex:1;border:1px solid var(--line-strong);border-radius:14px;padding:14px 16px;background:white}.search-suggest{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;align-items:center}.search-suggest a{padding:7px 12px;background:var(--sky-soft);border-radius:999px;color:var(--navy-2)}
.eyebrow{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--primary);text-transform:uppercase}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:12px 18px;border:1px solid transparent;cursor:pointer;font-weight:700}.btn-primary{background:var(--primary);color:white}.btn-primary:hover{background:var(--navy-2)}.btn-outline{background:var(--cream-3);border-color:var(--line-strong);color:var(--navy)}.btn-soft{background:var(--sky-soft);color:var(--navy)}.btn-live{background:var(--accent);color:white}.text-link{font-weight:700;color:var(--primary)}.pill{display:inline-flex;align-items:center;padding:4px 9px;border-radius:999px;background:var(--sky-soft);color:var(--navy-2);font-size:12px;font-weight:700}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
section{padding:72px 0}.section-soft{background:var(--bg-blue)}.section-cream{background:var(--bg-cream)}.section-dark{background:var(--navy);color:#f4fbff}.section-dark .eyebrow,.section-dark .text-link{color:var(--sky)}.section-dark .section-head p{color:#c7d9e4}.section-head{display:flex;justify-content:space-between;gap:28px;align-items:end;margin-bottom:26px}.section-head h2{font-size:clamp(26px,3vw,42px);line-height:1.15;margin:7px 0 4px;color:inherit}.section-head p{max-width:720px;margin:0;color:var(--text-2)}.section-head-b{align-items:center;border-bottom:1px solid var(--line);padding-bottom:16px}.section-head-c{text-align:center;display:block}.section-head-c p{margin-inline:auto}.section-head-d{background:var(--cream);padding:22px;border-radius:var(--radius-card)}.section-head-e{align-items:flex-start}.subhero{padding:64px 0;background:linear-gradient(135deg,var(--cream),var(--sky-soft))}.split-hero{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}.split-hero h1{font-size:clamp(42px,6vw,72px);line-height:1.03;margin:12px 0 18px;color:var(--navy);letter-spacing:-.03em}.split-hero p{font-size:18px;color:var(--text-2);max-width:760px}.subhero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:32px;box-shadow:var(--shadow)}
.hero-home{padding:54px 0 64px;background:radial-gradient(circle at 85% 20%,rgba(140,204,240,.42),transparent 30%),linear-gradient(120deg,var(--cream),var(--cream-3) 50%,var(--sky-soft))}.home-hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center}.hero-copy h1{font-size:clamp(46px,6vw,82px);line-height:1.01;margin:12px 0 20px;letter-spacing:-.04em;color:var(--navy)}.hero-copy>p{font-size:18px;color:var(--text-2);max-width:730px}.hero-search{margin-top:22px;display:flex;gap:8px;padding:8px;border:1px solid var(--line-strong);border-radius:18px;background:rgba(255,255,255,.75)}.hero-search input{flex:1;min-width:0;border:0;background:transparent;padding:10px;outline:none}.hero-visual{position:relative}.hero-visual>img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:34px;box-shadow:var(--shadow-hover)}.floating-panel{position:absolute;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:18px;padding:15px 16px;box-shadow:var(--shadow);min-width:180px}.floating-panel.one{left:-20px;bottom:26px}.floating-panel.two{right:-14px;top:24px}.floating-panel strong{display:block;font-size:22px;color:var(--navy)}
.chip-row{display:flex;gap:10px;overflow:auto;padding-bottom:6px;scrollbar-width:none}.chip-row::-webkit-scrollbar{display:none}.chip{flex:0 0 auto;padding:9px 14px;border-radius:999px;background:white;border:1px solid var(--line);font-size:14px}.chip:hover{border-color:var(--primary);color:var(--primary)}
.feature-layout{display:grid;grid-template-columns:1.35fr .65fr;gap:22px}.lead-video{position:relative;overflow:hidden;border-radius:26px;min-height:420px;background:var(--navy)}.lead-video img{width:100%;height:100%;position:absolute;inset:0;object-fit:cover;opacity:.72}.lead-overlay{position:absolute;inset:auto 0 0;padding:34px;color:white;background:linear-gradient(transparent,rgba(15,42,61,.92))}.lead-overlay h3{font-size:34px;line-height:1.12;margin:8px 0}.mini-stack{display:grid;gap:12px}.mini-feature{display:grid;grid-template-columns:140px 1fr;gap:14px;background:white;border-radius:16px;padding:10px}.mini-feature img{width:140px;height:96px;object-fit:cover;border-radius:12px}.mini-feature h3{font-size:16px;margin:4px 0}.mini-feature p{font-size:13px;color:var(--text-2);margin:0}
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.video-grid.four{grid-template-columns:repeat(4,1fr)}.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:12px;width:38px;height:38px;display:grid;place-items:center;border-radius:50%;background:rgba(255,255,255,.92);color:var(--navy);transition:transform .2s}.video-card:hover .play-icon{transform:scale(1.06)}.duration{position:absolute;right:10px;bottom:10px;background:rgba(15,42,61,.78);color:white;padding:3px 7px;border-radius:7px;font-size:12px}.video-body{padding-top:12px}.meta-row{display:flex;justify-content:space-between;gap:10px;align-items:center;color:var(--text-3);font-size:12px}.video-card h3{font-size:19px;line-height:1.3;margin:8px 0}.video-card p{font-size:14px;color:var(--text-2);margin:0}.byline{font-size:12px;color:var(--text-3);margin-top:8px}
.rail{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(280px,32%);gap:18px;overflow:auto;padding-bottom:12px;scroll-snap-type:x proximity}.rail>*{scroll-snap-align:start}.split-list{display:grid;grid-template-columns:1fr 1fr;gap:30px}.compact-list{display:grid;gap:8px}.compact-video{display:grid;grid-template-columns:auto 116px 1fr;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}.compact-video .rank{font-weight:900;font-size:20px;color:var(--primary);width:32px}.compact-video img{width:116px;height:72px;object-fit:cover;border-radius:10px}.compact-video h3{font-size:15px;margin:2px 0;line-height:1.3}.compact-video p,.compact-video span{font-size:12px;color:var(--text-3);margin:0}
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}.bento>*{grid-column:span 4}.bento>*:nth-child(1){grid-column:span 7;grid-row:span 2}.bento>*:nth-child(2){grid-column:span 5}.bento>*:nth-child(3){grid-column:span 5}.bento-card{min-height:230px;position:relative;overflow:hidden;border-radius:24px;background:var(--navy);color:white}.bento-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.65}.bento-card .inner{position:absolute;inset:auto 0 0;padding:24px;background:linear-gradient(transparent,rgba(15,42,61,.88))}.bento-card h3{font-size:24px;margin:6px 0}
.live-stage{display:grid;grid-template-columns:2fr 1fr;gap:20px}.live-main{position:relative;border-radius:28px;overflow:hidden;min-height:460px}.live-main img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.live-main .overlay{position:absolute;inset:auto 0 0;padding:32px;color:white;background:linear-gradient(transparent,rgba(15,42,61,.94))}.live-main h3{font-size:34px;margin:10px 0}.live-side{display:grid;gap:12px}.live-card{background:white;border-radius:20px;overflow:hidden;border:1px solid var(--line)}.live-media{position:relative;aspect-ratio:16/9;overflow:hidden}.live-media img{width:100%;height:100%;object-fit:cover}.live-badge{position:absolute;left:12px;top:12px;background:var(--accent);color:white;border-radius:999px;padding:4px 9px;font-size:12px;font-weight:800}.live-body{padding:15px}.live-body h3{margin:8px 0}.live-body p{font-size:14px;color:var(--text-2)}
.avatar-rail{display:flex;gap:20px;overflow:auto;padding:8px 2px 14px}.avatar-item{flex:0 0 116px;text-align:center}.avatar-item img{width:88px;height:88px;object-fit:cover;border-radius:50%;margin:auto;border:4px solid white;box-shadow:0 0 0 2px var(--sky)}.avatar-item strong{display:block;margin-top:8px}.avatar-item span{font-size:12px;color:var(--text-2)}.anchor-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.anchor-card{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:16px;border-radius:20px;background:var(--surface-blue);border:1px solid var(--line)}.anchor-card>img{width:120px;height:160px;object-fit:cover;border-radius:16px}.anchor-card h3{margin:4px 0;font-size:22px}.anchor-card p{font-size:13px;color:var(--text-2)}.anchor-card small{color:var(--text-3)}.status-dot{display:inline-block;width:8px;height:8px;background:var(--accent);border-radius:50%;margin-right:6px}
.topic-columns{display:grid;grid-template-columns:1fr 1fr;gap:18px}.topic-card{display:grid;grid-template-columns:48px 1fr;gap:12px;padding:18px;border-radius:18px;background:white;border:1px solid var(--line)}.avatar{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:var(--cream-2);color:var(--navy);font-weight:800}.topic-meta{display:flex;justify-content:space-between;gap:12px;color:var(--text-3);font-size:12px}.topic-card h3{margin:5px 0;font-size:18px}.topic-card p{color:var(--text-2);margin:0 0 10px;font-size:14px}.timeline{position:relative;padding-left:26px}.timeline:before{content:"";position:absolute;left:6px;top:0;bottom:0;width:2px;background:var(--line-strong)}.timeline-item{position:relative;padding:0 0 22px}.timeline-item:before{content:"";position:absolute;left:-25px;top:8px;width:12px;height:12px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 5px var(--sky-soft)}
.special-row{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center;margin:22px 0}.special-row-reverse img{order:2}.special-row img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:26px}.special-row h3{font-size:32px;margin:8px 0}.special-row p{color:var(--text-2)}.special-row blockquote{margin:16px 0;padding-left:16px;border-left:3px solid var(--accent);color:var(--text-2)}
.trend-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:28px}.trend-bars{display:grid;gap:12px}.trend-item{display:grid;grid-template-columns:1fr auto;gap:12px;padding:14px 0;border-bottom:1px solid var(--line)}.trend-item strong{display:block}.trend-item span{font-size:12px;color:var(--accent)}.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;align-content:flex-start}.tag-cloud a{padding:10px 14px;border-radius:16px;background:var(--cream);border:1px solid var(--line-warm)}
.editor-note{display:grid;grid-template-columns:.8fr 1.2fr;gap:32px;padding:34px;border-radius:28px;background:var(--cream)}.editor-note h3{font-size:34px;margin:0}.editor-note p{margin:0;color:var(--text-2);font-size:17px}.creator-story{display:grid;grid-template-columns:220px 1fr;gap:20px;padding:18px;border-radius:20px;background:white;border:1px solid var(--line)}.creator-story img{width:220px;height:170px;object-fit:cover;border-radius:16px}.creator-story h3{margin:4px 0;font-size:22px}.creator-story p{color:var(--text-2)}
.app-showcase{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}.phone-stack{position:relative;min-height:500px}.phone-stack img{position:absolute;border-radius:28px;box-shadow:var(--shadow-hover)}.phone-stack img:first-child{width:62%;left:4%;top:0}.phone-stack img:last-child{width:54%;right:0;bottom:0}.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}.feature-item{padding:18px;border-radius:16px;background:white;border:1px solid var(--line)}.feature-item h3{margin:0 0 6px}.feature-item p{margin:0;color:var(--text-2);font-size:14px}.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.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:white;font-weight:800;margin-bottom:12px}.notice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.notice{padding:20px;border-radius:18px;background:var(--accent-soft);border:1px solid var(--line-warm)}
.faq-list{display:grid;gap:10px;max-width:980px}.faq-item{border-bottom:1px solid var(--line)}.faq-question{width:100%;display:flex;justify-content:space-between;gap:20px;text-align:left;padding:18px 0;background:none;border:0;color:var(--navy);font-weight:800;cursor:pointer}.faq-answer{padding:0 0 18px}.faq-answer p{color:var(--text-2);margin:0}.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.stat{padding:18px;border-radius:16px;background:white;border:1px solid var(--line)}.stat strong{display:block;font-size:28px;color:var(--primary)}.two-col-copy{display:grid;grid-template-columns:1fr 1fr;gap:30px}.prose-card{padding:24px;border-radius:20px;background:white;border:1px solid var(--line)}.prose-card h3{font-size:22px;margin:0 0 8px}.prose-card p{color:var(--text-2)}
.site-footer{background:var(--navy);color:#d8e7ef;padding:58px 0 30px}.footer-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:28px}.footer-grid h2{font-size:15px;color:white;margin:0 0 12px}.footer-grid a{display:block;margin:7px 0;color:#d8e7ef}.footer-grid p{max-width:400px;color:#adc4d1}.footer-brand{color:white}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:22px;font-size:12px;color:#9fb8c7}.mobile-bottom-nav{display:none}.back-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border:0;border-radius:50%;background:var(--primary);color:white;opacity:0;pointer-events:none;transition:.2s;z-index:80}.back-top.visible{opacity:1;pointer-events:auto}
@media (max-width:1050px){.main-nav{display:none}.header-inner{gap:10px}.header-tools{margin-left:auto}.home-hero-grid,.split-hero,.app-showcase{grid-template-columns:1fr}.hero-visual{max-width:720px}.video-grid.four{grid-template-columns:repeat(2,1fr)}.anchor-grid{grid-template-columns:repeat(2,1fr)}.feature-layout,.live-stage,.trend-layout{grid-template-columns:1fr}.mega-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:repeat(3,1fr)}.footer-grid>div:first-child{grid-column:1/-1}.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:720px){body{padding-bottom:64px}.wrap{width:min(100% - 24px,var(--wrap))}.top-note .wrap{display:block;padding:7px 0}.top-note a{display:none}.site-header{top:0}.header-inner{min-height:62px}.brand span{display:none}.header-link{display:none}.mega-grid{grid-template-columns:repeat(2,1fr)}section{padding:52px 0}.home-hero-grid{gap:26px}.hero-copy h1{font-size:48px}.floating-panel{position:static;margin-top:10px;display:inline-block;margin-right:8px}.video-grid,.video-grid.four{grid-template-columns:1fr 1fr;gap:12px}.video-card h3{font-size:16px}.video-card p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.rail{grid-auto-columns:78%}.split-list,.topic-columns,.two-col-copy,.special-row,.editor-note{grid-template-columns:1fr}.special-row-reverse img{order:0}.anchor-grid{grid-template-columns:1fr}.anchor-card{grid-template-columns:92px 1fr}.anchor-card>img{width:92px;height:128px}.bento>*{grid-column:span 6!important}.bento>*:first-child{grid-column:1/-1!important}.live-main{min-height:330px}.compact-video{grid-template-columns:auto 90px 1fr}.compact-video img{width:90px;height:62px}.feature-list,.notice-grid{grid-template-columns:1fr}.steps{grid-template-columns:1fr 1fr}.phone-stack{min-height:380px}.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{display:block}.mobile-bottom-nav{position:fixed;z-index:90;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);background:rgba(255,255,255,.96);backdrop-filter:blur(16px);border-top:1px solid var(--line);padding:8px 4px}.mobile-bottom-nav a{text-align:center;font-size:12px;padding:7px}.back-top{bottom:78px}.section-head{align-items:flex-start}.search-dialog{margin-top:3vh;padding:26px 18px}.search-box{display:grid}.stat-strip{grid-template-columns:1fr 1fr}.creator-story{grid-template-columns:110px 1fr}.creator-story img{width:110px;height:150px}}
@media (max-width:480px){.video-grid,.video-grid.four{grid-template-columns:1fr}.steps{grid-template-columns:1fr}.stat-strip{grid-template-columns:1fr 1fr}.bento>*{grid-column:1/-1!important}.header-tools .menu-btn{padding-inline:8px}.section-head{display:block}.section-head .text-link{display:inline-block;margin-top:10px}}