:root{
 --primary:#176B8D;--primary-2:#2187AE;--sky:#55AFD3;--sky-light:#A9D9EA;--sky-soft:#E5F3F8;
 --navy:#123B50;--navy-2:#0B2938;--navy-dark:#071E2A;--accent:#D97945;--accent-soft:#F7E7DB;
 --bg:#F5F9FA;--bg-2:#EBF2F4;--bg-3:#FAFCFC;--surface:#fff;--surface-soft:rgba(255,255,255,.86);
 --text:#203640;--text-2:#60747D;--text-3:#91A0A6;--line:rgba(23,107,141,.10);--line-strong:rgba(23,107,141,.22);
 --shadow:0 6px 24px rgba(18,59,80,.08);--shadow-hover:0 15px 38px rgba(18,59,80,.14);
 --radius:10px;--radius-card:14px;--radius-large:20px;--radius-pill:999px;--wrap:1320px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.65}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input{font:inherit}.wrap{width:min(var(--wrap),calc(100% - 40px));margin:auto}.top-note{font-size:13px;text-align:center;padding:8px 16px;background:var(--navy-dark);color:#dbeff7;letter-spacing:.04em}.site-header{position:sticky;top:0;z-index:50;background:rgba(250,252,252,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.header-inner{height:72px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;min-width:max-content}.brand img{width:38px;height:38px;border-radius:11px}.brand span{display:flex;flex-direction:column;line-height:1.1}.brand b{font-size:19px}.brand small{font-size:9px;color:var(--text-3);letter-spacing:.14em;margin-top:4px}.desktop-nav{display:flex;gap:6px;align-items:center;flex:1}.desktop-nav a,.header-actions a{padding:9px 12px;border-radius:9px;font-size:14px;color:var(--text-2)}.desktop-nav a:hover,.desktop-nav a.is-active,.header-actions a:hover{background:var(--sky-soft);color:var(--primary)}.header-actions{display:flex;align-items:center;gap:3px}.header-actions .app-pill{background:var(--primary);color:white}.menu-btn{border:0;background:transparent;font-size:20px;color:var(--navy);padding:8px;cursor:pointer}.mega-menu{display:none;background:var(--surface);border-top:1px solid var(--line);box-shadow:var(--shadow)}.mega-menu.open{display:block}.mega-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;padding:18px 0}.mega-grid a{padding:10px 12px;border-radius:10px;background:var(--bg);font-size:14px}.mega-grid a:hover{background:var(--sky-soft);color:var(--primary)}
main{min-height:60vh}.section{padding:76px 0}.section.compact{padding:48px 0}.section.soft{background:var(--bg-2)}.section.white{background:#fff}.section.dark{background:var(--navy-dark);color:#eaf6fa}.section.dark .section-head p,.section.dark .byline,.section.dark .video-card p,.section.dark .video-meta{color:#acc4ce}.section.dark .video-card h3 a{color:#fff}.section.dark .video-card{background:transparent;border-color:rgba(255,255,255,.10)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:28px}.section-head h2{font-size:clamp(26px,3vw,38px);line-height:1.18;margin:6px 0 8px;letter-spacing:-.03em}.section-head p{margin:0;color:var(--text-2);max-width:760px}.eyebrow{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.14em;color:var(--primary);text-transform:uppercase}.section.dark .eyebrow{color:var(--sky-light)}.text-link{font-size:14px;color:var(--primary);font-weight:700;white-space:nowrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;background:var(--primary);color:#fff;padding:12px 18px;font-weight:750;border:1px solid var(--primary);transition:.2s}.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}.btn.ghost{background:transparent;color:var(--primary);border-color:var(--line-strong)}.dark .btn.ghost{color:#fff;border-color:rgba(255,255,255,.25)}
.hero{padding:64px 0 44px;background:linear-gradient(180deg,#f9fcfd 0%,#eff7f9 100%);overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;gap:48px;align-items:center}.hero h1{font-size:clamp(44px,6vw,76px);line-height:1.02;letter-spacing:-.055em;margin:12px 0 24px;max-width:760px;color:var(--navy-dark)}.hero-copy>p{font-size:18px;color:var(--text-2);max-width:650px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0}.hero-search{display:flex;max-width:620px;background:#fff;border:1px solid var(--line-strong);border-radius:14px;padding:5px;box-shadow:var(--shadow)}.hero-search input{flex:1;border:0;outline:0;padding:11px 13px;background:transparent;color:var(--text)}.hero-search button{border:0;background:var(--navy);color:#fff;border-radius:10px;padding:10px 16px;cursor:pointer}.hero-visual{position:relative;padding:18px 0 38px}.hero-main{border-radius:28px;overflow:hidden;box-shadow:0 26px 70px rgba(7,30,42,.20);aspect-ratio:16/10}.hero-main img{width:100%;height:100%;object-fit:cover}.float-panel{position:absolute;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border:1px solid var(--line);box-shadow:var(--shadow-hover);border-radius:16px;padding:15px 17px;min-width:190px}.float-panel strong{display:block;font-size:15px}.float-panel small{display:block;color:var(--text-2);margin-top:4px}.float-panel.one{left:-22px;bottom:8px}.float-panel.two{right:-16px;top:0}.float-panel .metric{font-size:24px;color:var(--primary);font-weight:850}.hot-searches,.chips{display:flex;flex-wrap:wrap;gap:10px}.hot-searches a,.chip{padding:9px 14px;border-radius:var(--radius-pill);background:#fff;border:1px solid var(--line);font-size:13px;color:var(--text-2)}.hot-searches a:hover,.chip:hover{color:var(--primary);border-color:var(--line-strong);background:var(--sky-soft)}
.feature-lead{display:grid;grid-template-columns:1.25fr .75fr;gap:24px}.featured-main{position:relative;border-radius:var(--radius-large);overflow:hidden;min-height:450px;background:var(--navy-dark);color:white}.featured-main img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;opacity:.74}.featured-main:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 35%,rgba(7,30,42,.92) 100%)}.featured-main .content{position:absolute;z-index:2;left:28px;right:28px;bottom:26px}.featured-main h3{font-size:30px;line-height:1.15;margin:10px 0}.editor-picks{display:grid;grid-template-columns:1fr 1fr;gap:14px}.mini-pick{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}.mini-pick img{width:100%;aspect-ratio:16/9;object-fit:cover}.mini-pick div{padding:12px}.mini-pick h4{margin:4px 0 0;line-height:1.35;font-size:15px}.category{font-size:12px;color:var(--primary);font-weight:800}
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.video-grid.three{grid-template-columns:repeat(3,1fr)}.video-card{min-width:0;border-radius:var(--radius-card);transition:.2s;background:var(--surface);border:1px solid var(--line);overflow:hidden}.video-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.video-card .thumb,.live-card .thumb{display:block;position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}.video-card .thumb img,.live-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s}.video-card:hover .thumb img,.live-card:hover .thumb img{transform:scale(1.02)}.play{position:absolute;left:14px;bottom:13px;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.94);color:var(--navy);font-size:13px;box-shadow:var(--shadow);transition:.2s}.video-card:hover .play{transform:scale(1.06)}.duration{position:absolute;right:10px;bottom:10px;background:rgba(7,30,42,.82);color:#fff;border-radius:7px;padding:3px 7px;font-size:11px}.video-card>h3,.video-card>p,.video-card>.byline,.video-card>.video-meta{margin-left:16px;margin-right:16px}.video-meta{display:flex;justify-content:space-between;gap:10px;color:var(--text-3);font-size:12px;margin-top:14px}.video-card h3{font-size:17px;line-height:1.42;margin-top:7px;margin-bottom:7px}.video-card p{font-size:13px;color:var(--text-2);margin-top:0;margin-bottom:10px}.byline{font-size:12px;color:var(--text-3);padding-bottom:15px}.horizontal-track{display:flex;gap:18px;overflow:auto;padding:3px 2px 18px;scroll-snap-type:x proximity}.horizontal-track .video-card{min-width:300px;scroll-snap-align:start}
.ranking{display:grid;grid-template-columns:.75fr 1.25fr;gap:26px}.rank-list{background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px 22px}.rank-item{display:grid;grid-template-columns:42px 1fr auto;align-items:center;gap:12px;padding:15px 0;border-bottom:1px solid var(--line)}.rank-item:last-child{border-bottom:0}.rank-num{font-size:22px;font-weight:900;color:var(--primary)}.rank-item strong{font-size:14px}.rank-item small{color:var(--text-3);display:block}.rank-type{font-size:11px;background:var(--sky-soft);color:var(--primary);padding:5px 8px;border-radius:999px}
.live-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.live-card{background:#fff;border-radius:16px;overflow:hidden;border:1px solid var(--line);transition:.2s}.live-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.live-badge{position:absolute;left:12px;top:12px;background:var(--accent);color:#fff;border-radius:8px;padding:5px 8px;font-size:11px;font-weight:850}.live-body{padding:16px}.live-body h3{margin:5px 0;font-size:18px}.live-body p{font-size:13px;color:var(--text-2);margin:5px 0 10px}.live-body .byline{display:flex;justify-content:space-between;padding:0}.anchor-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.anchor-card{display:grid;grid-template-columns:82px 1fr;gap:15px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px}.anchor-card img{width:82px;height:82px;object-fit:cover;border-radius:50%}.anchor-card strong{font-size:16px}.anchor-card small{display:block;color:var(--primary);margin:3px 0}.anchor-card p{font-size:13px;color:var(--text-2);margin:7px 0}.anchor-status{font-size:11px;color:var(--text-2)}.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--accent);margin-right:6px}.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.topic-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.topic-top{display:flex;align-items:center;gap:10px}.avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--sky-soft);color:var(--primary);font-weight:850}.topic-top div{display:flex;flex-direction:column}.topic-top small{color:var(--text-3);font-size:11px}.topic-tag{margin-left:auto;font-size:11px;border-radius:999px;background:var(--bg-2);padding:5px 8px}.topic-card h3{font-size:18px;margin:14px 0 5px}.topic-card p{font-size:13px;color:var(--text-2)}.topic-stats{font-size:12px;color:var(--text-3)}
.bento{display:grid;grid-template-columns:1.15fr .85fr .85fr;grid-template-rows:260px 220px;gap:18px}.bento-card{position:relative;border-radius:20px;overflow:hidden;background:var(--navy);color:white;min-height:0}.bento-card:first-child{grid-row:1/3}.bento-card:nth-child(4){grid-column:2/4}.bento-card img{width:100%;height:100%;object-fit:cover;opacity:.7}.bento-card:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(7,30,42,.88))}.bento-copy{position:absolute;z-index:2;left:20px;right:20px;bottom:18px}.bento-copy h3{margin:5px 0;font-size:21px}.bento-copy p{margin:0;color:#c7dbe3;font-size:13px}.trend-bars{display:grid;gap:14px}.trend-row{display:grid;grid-template-columns:140px 1fr 54px;gap:14px;align-items:center}.trend-row strong{font-size:13px}.trend-bar{height:9px;background:var(--bg-2);border-radius:999px;overflow:hidden}.trend-bar span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--sky));border-radius:inherit}.trend-row small{color:var(--text-3);text-align:right}.split{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}.split.reverse .split-media{order:2}.split-media{border-radius:24px;overflow:hidden;box-shadow:var(--shadow)}.split-copy h2{font-size:38px;line-height:1.14;margin:9px 0 15px}.split-copy p{color:var(--text-2)}.check-list{display:grid;gap:10px;margin:20px 0}.check-list div{display:flex;gap:10px;align-items:flex-start}.check-list span{color:var(--primary);font-weight:900}.timeline{position:relative;padding-left:24px;border-left:2px solid var(--line-strong);display:grid;gap:20px}.timeline article{position:relative;background:#fff;padding:18px;border-radius:14px;border:1px solid var(--line)}.timeline article:before{content:"";position:absolute;left:-31px;top:24px;width:12px;height:12px;border-radius:50%;background:var(--primary);border:3px solid var(--bg)}.timeline time{font-size:11px;color:var(--primary);font-weight:800}.timeline h3{font-size:17px;margin:3px 0}.timeline p{font-size:13px;color:var(--text-2);margin:0}.tutorial-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.tutorial-card{background:#fff;border:1px solid var(--line);padding:18px;border-radius:15px}.tutorial-card h3{font-size:16px;margin:7px 0}.tutorial-card p{font-size:13px;color:var(--text-2);margin:0}.poster-card{display:grid;grid-template-columns:1.1fr .9fr;background:var(--navy-dark);color:white;border-radius:24px;overflow:hidden}.poster-card img{width:100%;height:100%;object-fit:cover;min-height:340px}.poster-copy{padding:42px;display:flex;flex-direction:column;justify-content:center}.poster-copy h2{font-size:36px;line-height:1.15;margin:8px 0 14px}.poster-copy p{color:#bad0d9}.faq{display:grid;gap:12px}.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:17px 19px}.faq summary{cursor:pointer;font-weight:750}.faq p{color:var(--text-2);font-size:14px}.notice-card{padding:20px;border-radius:16px;background:var(--accent-soft);border:1px solid rgba(217,121,69,.18)}
.page-hero{padding:64px 0;background:linear-gradient(180deg,#f8fcfd,#edf6f8)}.page-hero-grid{display:grid;grid-template-columns:1fr .85fr;align-items:center;gap:42px}.page-hero h1{font-size:clamp(42px,5vw,64px);line-height:1.04;letter-spacing:-.045em;margin:9px 0 18px}.page-hero p{color:var(--text-2);font-size:17px}.page-hero img{border-radius:24px;aspect-ratio:16/10;object-fit:cover;box-shadow:var(--shadow-hover)}.content-two-col{display:grid;grid-template-columns:1fr 320px;gap:28px}.side-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.side-card h3{margin-top:0}.side-list{display:grid;gap:12px}.side-list a{font-size:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}.search-box{display:flex;max-width:820px;margin:auto;background:#fff;border:1px solid var(--line-strong);padding:6px;border-radius:15px}.search-box input{flex:1;border:0;padding:12px;outline:0}.search-box button{border:0;background:var(--primary);color:#fff;border-radius:10px;padding:0 20px}.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}.tabs a{padding:8px 12px;border:1px solid var(--line);background:#fff;border-radius:999px;font-size:13px}.tabs a.active{background:var(--primary);color:#fff;border-color:var(--primary)}.prose{max-width:860px}.prose h2{font-size:30px;margin-top:38px}.prose h3{font-size:20px;margin-top:24px}.prose p,.prose li{color:var(--text-2)}.prose .callout{background:var(--sky-soft);border-left:4px solid var(--primary);padding:16px 18px;border-radius:8px}.watch-layout{display:grid;grid-template-columns:1fr 340px;gap:26px}.player{background:#000;border-radius:18px;overflow:hidden}.player video{width:100%;aspect-ratio:16/9;display:block;background:#000}.video-info{background:#fff;border:1px solid var(--line);padding:22px;border-radius:16px;margin-top:16px}.comment{display:flex;gap:12px;padding:16px 0;border-bottom:1px solid var(--line)}.comment .avatar{flex:0 0 38px}.app-showcase{display:grid;grid-template-columns:.75fr 1.25fr;gap:32px;align-items:center}.app-showcase .phone{max-height:600px;object-fit:contain;margin:auto}.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}.feature-box{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.feature-box h3{margin:4px 0;font-size:16px}.feature-box p{font-size:13px;color:var(--text-2);margin:0}.steps{counter-reset:step;display:grid;gap:16px}.step{counter-increment:step;display:grid;grid-template-columns:54px 1fr;gap:16px;align-items:start;background:#fff;border:1px solid var(--line);padding:18px;border-radius:14px}.step:before{content:counter(step);display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--sky-soft);color:var(--primary);font-weight:900}.step h3{margin:3px 0}.step p{margin:3px 0;color:var(--text-2);font-size:14px}
.site-footer{background:var(--navy-dark);color:#d9e7ec;padding:58px 0 22px;margin-top:50px}.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}.brand--footer b{color:#fff}.site-footer p{max-width:430px;color:#9eb7c1;font-size:14px}.site-footer h4{margin:0 0 14px;color:white}.site-footer div>a{display:block;color:#a9c0c9;font-size:13px;margin:8px 0}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;color:#7e9ba6;font-size:12px}.footer-bottom a{display:inline!important}.mobile-bottom{display:none}
@media(max-width:1050px){.desktop-nav{display:none}.header-actions{margin-left:auto}.hero-grid,.page-hero-grid,.feature-lead,.ranking,.split,.poster-card,.app-showcase,.watch-layout,.content-two-col{grid-template-columns:1fr}.hero-visual{max-width:760px}.video-grid{grid-template-columns:repeat(2,1fr)}.live-grid,.anchor-grid,.tutorial-grid{grid-template-columns:repeat(2,1fr)}.bento{grid-template-columns:1fr 1fr;grid-template-rows:280px 240px 220px}.bento-card:first-child{grid-column:1/3;grid-row:auto}.bento-card:nth-child(4){grid-column:1/3}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2/4}.mega-grid{grid-template-columns:repeat(4,1fr)}}
@media(max-width:680px){body{padding-bottom:64px}.wrap{width:min(100% - 28px,var(--wrap))}.top-note{font-size:11px}.header-inner{height:62px}.header-actions>a:not(.app-pill){display:none}.hero{padding-top:38px}.hero h1{font-size:44px}.hero-grid{gap:22px}.float-panel.one{left:5px}.float-panel.two{right:5px}.section{padding:54px 0}.section-head{align-items:start;flex-direction:column;gap:8px}.video-grid,.video-grid.three,.live-grid,.anchor-grid,.tutorial-grid,.topic-grid,.feature-list,.editor-picks{grid-template-columns:1fr}.horizontal-track .video-card{min-width:78vw}.bento{display:grid;grid-template-columns:1fr;grid-template-rows:none}.bento-card,.bento-card:first-child,.bento-card:nth-child(4){grid-column:auto;grid-row:auto;min-height:260px}.ranking{gap:18px}.trend-row{grid-template-columns:100px 1fr 40px}.split-copy h2,.poster-copy h2{font-size:30px}.poster-copy{padding:28px}.page-hero{padding-top:42px}.page-hero h1{font-size:42px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/3}.footer-grid>div:last-child{grid-column:auto}.footer-bottom{flex-direction:column;gap:8px}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;z-index:90;background:rgba(255,255,255,.96);backdrop-filter:blur(16px);border-top:1px solid var(--line);padding:9px 5px 10px}.mobile-bottom a{text-align:center;font-size:12px;color:var(--text-2)}.mega-grid{grid-template-columns:repeat(2,1fr)}}