: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:#FFFFFF; --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;background:var(--bg-3);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;line-height:1.65}.wrap{width:min(var(--wrap),calc(100% - 40px));margin:auto}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input{font:inherit}.announcement{background:var(--navy-dark);color:#d8edf6;font-size:13px}.announcement .wrap{display:flex;justify-content:center;gap:10px;padding:7px 0}.announcement a{color:#fff}.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:30px}.brand{display:flex;align-items:center;gap:11px;min-width:max-content}.brand img{width:42px;height:42px;border-radius:13px}.brand strong{display:block;font-size:18px;letter-spacing:.04em}.brand small{display:block;font-size:9px;letter-spacing:.18em;color:var(--text-3);margin-top:-2px}.desktop-nav{display:flex;align-items:center;gap:6px;margin-left:20px}.desktop-nav a{padding:10px 12px;border-radius:9px;color:var(--text-2);font-size:15px}.desktop-nav a:hover,.desktop-nav a.is-active{color:var(--primary);background:var(--sky-soft)}.header-tools{margin-left:auto;display:flex;align-items:center;gap:8px}.icon-link,.text-tool,.app-tool,.menu-toggle{height:38px;display:grid;place-items:center;border:1px solid var(--line);background:#fff;border-radius:10px;padding:0 12px}.icon-link{font-size:22px}.app-tool{background:var(--primary);color:white;border-color:var(--primary)}.menu-toggle{cursor:pointer}.mega-menu{display:none;background:#fff;border-top:1px solid var(--line);box-shadow:var(--shadow)}.mega-menu.is-open{display:block}.mega-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding:25px 0 30px}.mega-grid div{display:grid;gap:8px}.mega-grid small{color:var(--text-3);text-transform:uppercase;letter-spacing:.12em}.mega-grid a{font-weight:650}.section{padding:76px 0}.section.slim{padding:20px 0}.section.soft{background:var(--bg)}.section.dark{background:linear-gradient(135deg,var(--navy-dark),var(--navy-2));color:#fff}.section.dark .section-head p,.section.dark .meta,.section.dark .video-card p,.section.dark small{color:#b8ccd5}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:28px}.section-head h2{font-size:32px;line-height:1.18;margin:5px 0 0}.section-head p{margin:8px 0 0;color:var(--text-2);max-width:720px}.eyebrow{display:block;color:var(--primary);font-size:12px;font-weight:800;letter-spacing:.16em}.dark .eyebrow{color:var(--sky-light)}.text-link{color:var(--primary);font-weight:700;white-space:nowrap}.dark .text-link{color:#d9f1fa}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:11px;font-weight:750;border:1px solid transparent}.btn.primary{background:var(--primary);color:#fff}.btn.ghost{background:#fff;border-color:var(--line-strong);color:var(--primary)}.btn.light{background:#fff;color:var(--navy-dark)}.btn.outline-light{border-color:rgba(255,255,255,.5);color:#fff}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.home-hero{padding:72px 0 58px;background:radial-gradient(circle at 75% 15%,rgba(85,175,211,.20),transparent 34%),linear-gradient(180deg,#fbfdfd,#eef6f8)}.hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(460px,.92fr);gap:64px;align-items:center}.hero-copy h1{font-size:64px;line-height:1.04;letter-spacing:-.04em;margin:14px 0 22px}.hero-copy h1 span{color:var(--primary)}.hero-copy p{color:var(--text-2);font-size:17px;max-width:720px}.hero-search{display:flex;gap:0;margin-top:22px;background:#fff;border:1px solid var(--line-strong);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);max-width:610px}.hero-search input{flex:1;border:0;outline:0;padding:14px 16px;background:transparent}.hero-search button{border:0;background:var(--navy);color:#fff;padding:0 22px;cursor:pointer}.hero-visual{position:relative;min-height:520px}.hero-visual>img{width:100%;height:520px;object-fit:cover;border-radius:28px;box-shadow:0 30px 70px rgba(7,30,42,.18)}.hero-panel{position:absolute;background:rgba(255,255,255,.90);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.7);box-shadow:var(--shadow);border-radius:14px;padding:14px 16px;min-width:172px}.hero-panel small,.hero-panel span{display:block;color:var(--text-2);font-size:12px}.hero-panel strong{display:block;font-size:22px;color:var(--navy);margin:2px 0}.panel-top{right:-18px;top:40px}.panel-bottom{left:-24px;bottom:36px}.hot-search,.chips{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.hot-search strong{margin-right:8px}.hot-search a,.chips a{padding:8px 13px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-pill);color:var(--text-2);font-size:13px}.chips.large a{padding:11px 16px;font-size:14px}.dark .chips a{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.12);color:#e7f4f9}.spotlight-grid{display:grid;grid-template-columns:1.55fr .9fr;gap:20px}.spotlight{position:relative;min-height:500px;border-radius:22px;overflow:hidden;background:var(--navy-dark)}.spotlight img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;opacity:.72}.spotlight:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 25%,rgba(7,30,42,.88))}.spotlight-copy{position:absolute;z-index:2;left:32px;bottom:32px;max-width:620px;color:#fff}.spotlight-copy h2{font-size:36px;line-height:1.2;margin:10px 0}.spotlight-copy p{color:#d6e3e8}.meta-tag{display:inline-block;padding:4px 9px;border-radius:999px;background:var(--sky-soft);color:var(--primary);font-size:11px;font-weight:800}.spotlight .meta-tag{background:rgba(255,255,255,.16);color:#fff}.editor-list{display:grid;gap:10px}.editor-list a{display:grid;grid-template-columns:138px 1fr;gap:14px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px;transition:.2s}.editor-list a:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.editor-list img{width:138px;height:92px;object-fit:cover;border-radius:10px}.editor-list span{display:block}.editor-list small,.editor-list em{display:block;color:var(--text-3);font-style:normal;font-size:11px}.editor-list strong{display:block;line-height:1.35;margin:4px 0}.ranking-panel{background:#fff;border-radius:16px;border:1px solid var(--line);padding:8px 24px}.ranking-list{list-style:none;padding:0;margin:0}.ranking-list li{display:grid;grid-template-columns:48px 1fr auto;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid var(--line)}.ranking-list li:last-child{border:0}.rank-num{font-weight:900;font-size:20px;color:var(--primary)}.ranking-list a{font-weight:750}.ranking-list small{display:block;color:var(--text-3)}.ranking-list em{font-style:normal;color:var(--text-2);font-size:12px}.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.video-grid.four{grid-template-columns:repeat(4,1fr)}.video-grid.three{grid-template-columns:repeat(3,1fr)}.video-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:.2s}.video-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}.dark .video-card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.1)}.media-thumb{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}.media-thumb img{width:100%;height:100%;object-fit:cover;transition:.25s}.video-card:hover .media-thumb img{transform:scale(1.02)}.play{position:absolute;left:50%;top:50%;translate:-50% -50%;width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.9);color:var(--primary);box-shadow:var(--shadow);transition:.2s;padding-left:3px}.video-card:hover .play{transform:scale(1.06)}.duration{position:absolute;right:9px;bottom:9px;background:rgba(7,30,42,.78);color:#fff;border-radius:6px;padding:3px 7px;font-size:11px}.card-body{padding:16px}.card-body h3{font-size:18px;line-height:1.4;margin:8px 0}.card-body p{color:var(--text-2);font-size:13px;margin:0 0 12px}.meta{display:flex;justify-content:space-between;gap:10px;color:var(--text-3);font-size:12px}.video-card.compact .card-body p{display:none}.horizontal-rail{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(280px,32%);gap:16px;overflow-x:auto;padding-bottom:12px;scroll-snap-type:x 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p{margin:0}.avatar-dot,.topic-avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--sky-soft);color:var(--primary);font-weight:900;flex:none}.anchor-row{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(210px,1fr);gap:14px;overflow-x:auto;padding-bottom:8px}.anchor-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.anchor-card{min-width:0;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px}.dark .anchor-card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.10)}.anchor-card img{width:72px;height:72px;object-fit:cover;border-radius:50%;margin-bottom:12px}.anchor-card h3{font-size:20px;margin:8px 0 0}.anchor-card strong{color:var(--primary);font-size:13px}.dark .anchor-card strong{color:var(--sky-light)}.anchor-card p{font-size:12px;color:var(--text-2);margin-bottom:0}.status-pill{display:inline-block;padding:3px 8px;border-radius:999px;background:var(--accent-soft);color:#a6532d;font-size:10px;font-weight:800}.status-pill.muted{background:var(--bg-2);color:var(--text-2)}.split-feature{display:grid;grid-template-columns:1fr 1.1fr;gap:50px;align-items:center}.split-feature.reverse{grid-template-columns:1.05fr 1fr}.split-feature.reverse>div{order:2}.split-feature img{width:100%;height:390px;object-fit:cover;border-radius:22px}.split-feature h2{font-size:40px;line-height:1.15;margin:9px 0}.split-feature p{color:var(--text-2)}.mini-live-list{display:grid;gap:10px;margin-top:20px}.mini-live-list a{display:flex;gap:10px;align-items:center;padding:10px 0;border-top:1px solid var(--line)}.mini-live-list small{display:block;color:var(--text-3)}.live-dot{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px var(--accent-soft)}.bento-grid{display:grid;grid-template-columns:1.4fr .8fr;grid-template-rows:1fr 1fr;gap:14px;min-height:520px}.bento{position:relative;overflow:hidden;border-radius:18px;min-height:230px}.bento.large{grid-row:1/3}.bento img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}.bento:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 25%,rgba(7,30,42,.84))}.bento span{position:absolute;z-index:2;left:20px;bottom:18px;color:#fff;display:grid}.bento strong{font-size:22px;line-height:1.25}.bento.large strong{font-size:32px}.magazine-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:24px}.magazine-lead{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}.magazine-lead img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px}.magazine-lead span{display:block;color:var(--primary);font-size:12px;font-weight:800;margin-top:14px}.magazine-lead h3{font-size:28px;line-height:1.25;margin:8px 0}.magazine-lead p{color:var(--text-2)}.magazine-stack{display:grid;gap:14px}.magazine-stack article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}.magazine-stack small{color:var(--primary)}.magazine-stack h3{margin:4px 0 8px}.magazine-stack p{color:var(--text-2);margin:0}.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line-strong)}.timeline>div{position:relative;padding:26px 24px 0;border-left:1px solid var(--line)}.timeline>div:before{content:"";position:absolute;width:10px;height:10px;border-radius:50%;background:var(--primary);top:-5px;left:-5px}.timeline time{color:var(--primary);font-weight:850}.timeline strong{display:block;font-size:18px;margin:6px 0}.timeline p{color:var(--text-2);font-size:13px}.knowledge-strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);background:#fff;border-radius:16px;overflow:hidden}.knowledge-strip>div{padding:22px;border-right:1px solid var(--line);display:flex;gap:14px}.knowledge-strip>div:last-child{border-right:0}.knowledge-strip strong{font-size:28px;color:var(--sky)}.knowledge-strip b,.knowledge-strip small{display:block}.knowledge-strip small{color:var(--text-2);margin-top:5px}.creator-feature{display:grid;grid-template-columns:400px 1fr;align-items:center;gap:46px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px}.creator-feature img{width:100%;height:330px;object-fit:cover;border-radius:15px}.creator-feature h2{font-size:36px;margin:8px 0}.creator-feature p{color:var(--text-2)}.creator-tags{display:flex;gap:8px;flex-wrap:wrap}.creator-tags span{padding:7px 10px;background:var(--sky-soft);color:var(--primary);border-radius:999px;font-size:12px}.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.topic-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.dark .topic-card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.10)}.topic-user{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--text-3)}.topic-user .topic-avatar{width:30px;height:30px}.topic-card h3{font-size:19px;margin:12px 0 7px}.topic-card p{color:var(--text-2);font-size:13px}.topic-actions{display:flex;gap:18px;color:var(--text-3);font-size:12px}.topic-banner{position:relative;min-height:400px;border-radius:22px;overflow:hidden}.topic-banner img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.topic-banner:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(7,30,42,.92),rgba(7,30,42,.25))}.topic-banner>div{position:relative;z-index:2;color:#fff;max-width:650px;padding:70px 55px}.topic-banner h2{font-size:40px;line-height:1.15;margin:8px 0}.topic-banner p{color:#d7e7ed}.trend-bars{display:grid;gap:14px}.trend-bars>div{display:grid;grid-template-columns:130px 1fr 90px;gap:14px;align-items:center}.trend-bars i{position:relative;height:10px;background:var(--bg-2);border-radius:999px;overflow:hidden}.trend-bars i:after{content:"";position:absolute;left:0;top:0;bottom:0;width:var(--w);background:linear-gradient(90deg,var(--primary),var(--sky));border-radius:inherit}.trend-bars em{font-size:12px;font-style:normal;color:var(--text-3)}.special-feature{display:grid;grid-template-columns:1.15fr .85fr;gap:0;min-height:440px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.10);border-radius:22px;overflow:hidden}.special-feature img{width:100%;height:100%;object-fit:cover}.special-feature div{padding:50px;align-self:center}.special-feature h2{font-size:40px;line-height:1.15;margin:10px 0}.special-feature p{color:#bdd0d8}.compact-feed{display:grid;gap:10px}.compact-feed a{display:grid;grid-template-columns:160px 1fr auto;gap:16px;align-items:center;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px}.compact-feed img{width:160px;height:94px;object-fit:cover;border-radius:9px}.compact-feed small,.compact-feed em{display:block;font-style:normal;color:var(--text-3);font-size:12px}.compact-feed strong{display:block;margin:4px 0}.compact-feed b{color:var(--text-2);font-size:12px}.compact-feed.large a{grid-template-columns:220px 1fr auto}.compact-feed.large img{width:220px;height:126px}.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.how-grid article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px}.how-grid span{font-size:28px;font-weight:900;color:var(--sky)}.how-grid h3{font-size:20px;margin:12px 0 6px}.how-grid p{color:var(--text-2);margin:0}.tutorial-list{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tutorial-list a,.tutorial-list article{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.tutorial-list span{font-size:11px;color:var(--primary);font-weight:800}.tutorial-list strong,.tutorial-list h3{display:block;margin:8px 0;font-size:17px}.tutorial-list p{color:var(--text-2);font-size:12px;margin:0}.tutorial-list.expanded{grid-template-columns:repeat(3,1fr)}.tutorial-list.expanded article{padding:24px}.tutorial-list.expanded a{display:inline-block;padding:0;border:0;margin-top:14px;color:var(--primary)}.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.quote-grid blockquote{margin:0;background:var(--navy);color:#fff;border-radius:16px;padding:28px;font-size:19px;line-height:1.6}.quote-grid cite{display:block;font-size:11px;font-style:normal;color:var(--sky-light);margin-top:15px}.app-section{background:linear-gradient(180deg,#edf6f8,#fafdfe)}.app-grid{display:grid;grid-template-columns:1fr 1.25fr .7fr;gap:35px;align-items:center}.app-grid>img:first-child{width:100%;height:360px;object-fit:cover;border-radius:22px}.app-grid h2{font-size:42px;margin:8px 0}.app-grid p{color:var(--text-2)}.app-points{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.app-points span{padding:7px 10px;background:#fff;border:1px solid var(--line);border-radius:999px;font-size:12px}.phone-img{max-height:390px;object-fit:contain;filter:drop-shadow(0 22px 30px rgba(7,30,42,.18))}.install-banner{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px 32px;display:flex;justify-content:space-between;align-items:center;gap:30px}.install-banner h2{margin:4px 0}.install-banner p{margin:0;color:var(--text-2)}.safety-grid,.about-split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}.safety-grid img,.about-split img{width:100%;height:360px;object-fit:cover;border-radius:20px}.safety-grid h2,.about-split h2{font-size:38px;margin:8px 0}.safety-grid p,.about-split p{color:var(--text-2)}.faq-list{display:grid;gap:10px}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:13px;padding:16px 18px}.faq-list summary{cursor:pointer;font-weight:750}.faq-list p{color:var(--text-2);margin-bottom:0}.final-cta{background:var(--primary);color:#fff}.final-cta 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