: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;font-family:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.65}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.wrap{width:min(var(--wrap),calc(100% - 40px));margin: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:16px;top:16px;z-index:1000;background:#fff;padding:10px 14px;border-radius:10px;transform:translateY(-180%)}.skip-link:focus{transform:none}.site-notice{background:var(--cream-2);border-bottom:1px solid var(--line-warm);font-size:13px}.site-notice .wrap{display:flex;justify-content:space-between;gap:20px;padding:7px 0}.site-notice a{color:var(--navy);font-weight:700}.site-header{position:sticky;top:0;z-index:90;background:rgba(255,249,238,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.header-row{height:72px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;font-size:21px;font-weight:900;color:var(--navy)}.brand img{width:46px;height:36px;object-fit:cover;border-radius:10px}.desktop-nav{display:flex;align-items:center;gap:4px;margin-right:auto}.desktop-nav a{padding:9px 13px;border-radius:var(--radius-pill);color:var(--text-2);font-weight:700}.desktop-nav a:hover,.desktop-nav a.active{background:var(--sky-soft);color:var(--primary)}.header-actions{display:flex;align-items:center;gap:8px}.icon-btn,.pill-btn{border:1px solid var(--line-strong);background:rgba(255,255,255,.72);padding:9px 12px;border-radius:var(--radius-pill);color:var(--navy)}.pill-btn{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:800}.mega-menu{position:absolute;left:0;right:0;background:rgba(255,253,248,.98);border-bottom:1px solid var(--line);box-shadow:var(--shadow);padding:20px 0 26px}.mega-menu[hidden]{display:none!important}.mega-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.mega-grid a{padding:14px;border-radius:14px;background:var(--surface-blue);border:1px solid var(--line)}.mega-grid b,.mega-grid span{display:block}.mega-grid span{font-size:12px;color:var(--text-2);margin-top:3px}
.search-modal{display:none;position:fixed;inset:0;z-index:200;background:rgba(15,42,61,.44);padding:8vh 20px;align-items:flex-start;justify-content:center}.search-modal.is-open{display:flex}.search-modal[hidden]{display:none !important}body.search-open{overflow:hidden}.search-dialog{width:min(760px,100%);background:var(--surface-cream);border-radius:var(--radius-large);box-shadow:0 30px 80px rgba(15,42,61,.28);padding:28px;border:1px solid rgba(255,255,255,.7)}.search-dialog-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}.search-dialog h2{margin:2px 0 18px;font-size:30px}.search-close-btn{border:0;background:var(--sky-soft);width:42px;height:42px;border-radius:50%;font-size:28px;color:var(--navy)}.search-form{display:grid;grid-template-columns:1fr auto;gap:10px}.search-form input{min-width:0;border:1px solid var(--line-strong);border-radius:14px;padding:14px 16px;background:#fff;color:var(--text)}.primary-btn,.secondary-btn,.live-btn{display:inline-flex;align-items:center;justify-content:center;border-radius:14px;padding:11px 17px;font-weight:800;border:1px solid transparent}.primary-btn{background:var(--primary);color:#fff}.secondary-btn{background:var(--cream);border-color:var(--line-strong);color:var(--navy)}.live-btn{background:var(--accent);color:#fff}.search-suggestions{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px;color:var(--text-2)}.search-suggestions a{padding:5px 10px;border-radius:999px;background:var(--sky-soft)}
main{overflow:hidden}section{padding:68px 0}.section-soft{background:var(--bg-blue)}.section-cream{background:var(--cream)}.section-dark{background:var(--navy);color:#f7fbfd}.section-dark .section-head p,.section-dark .meta-line,.section-dark .byline,.section-dark small{color:#bdd1df}.section-dark a{color:inherit}.section-head{display:flex;justify-content:space-between;gap:26px;align-items:end;margin-bottom:28px}.section-head h2{font-size:clamp(28px,3vw,42px);line-height:1.15;margin:5px 0 8px;color:inherit}.section-head p{margin:0;max-width:760px;color:var(--text-2)}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:900;color:var(--primary)}.text-link{font-weight:800;color:var(--primary);white-space:nowrap}.tag-row,.chip-row{display:flex;gap:8px;flex-wrap:wrap}.tag-row span,.chip-row a,.chip-row button{border:1px solid var(--line);background:var(--surface);padding:6px 10px;border-radius:999px;font-size:13px;color:var(--text-2)}
.hero{padding:46px 0 70px;background:radial-gradient(circle at 88% 12%,rgba(140,204,240,.34),transparent 30%),linear-gradient(145deg,var(--cream),var(--sky-soft))}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:46px;align-items:center}.hero h1,.page-hero h1{font-size:clamp(44px,6vw,78px);line-height:1.04;letter-spacing:-.04em;margin:10px 0 20px;color:var(--navy)}.hero p.lead,.page-hero p{font-size:18px;color:var(--text-2);max-width:760px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}.hero-search{display:grid;grid-template-columns:1fr auto;gap:10px;max-width:620px;margin-top:24px}.hero-search input{border:1px solid var(--line-strong);border-radius:14px;padding:13px 16px;background:rgba(255,255,255,.78)}.hero-media{position:relative}.hero-media>img{aspect-ratio:16/11;object-fit:cover;border-radius:34px;box-shadow:var(--shadow-hover)}.floating-card{position:absolute;right:-10px;bottom:24px;width:min(320px,82%);background:rgba(255,253,248,.93);backdrop-filter:blur(12px);border-radius:18px;padding:16px;border:1px solid rgba(255,255,255,.8);box-shadow:var(--shadow)}.floating-card h3{margin:4px 0 8px}.mini-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.mini-stat{padding:10px;background:var(--sky-soft);border-radius:12px}.mini-stat b{font-size:22px;color:var(--primary);display:block}.page-hero{padding:52px 0;background:linear-gradient(135deg,var(--cream),var(--sky-soft))}.page-hero-grid{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:40px}.page-hero h1{font-size:clamp(40px,5vw,66px)}.page-hero img{aspect-ratio:16/9;object-fit:cover;border-radius:28px}
.media-thumb{position:relative;display:block;overflow:hidden;border-radius:16px;background:var(--sky-soft)}.media-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .24s ease}.video-card:hover .media-thumb img{transform:scale(1.02)}.play-dot{position:absolute;left:14px;bottom:12px;display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.9);color:var(--navy);transition:transform .2s}.video-card:hover .play-dot{transform:scale(1.06)}.duration{position:absolute;right:10px;bottom:10px;background:rgba(15,42,61,.82);color:#fff;border-radius:8px;padding:3px 7px;font-size:12px}.video-card{min-width:0}.video-card .card-body{padding:13px 2px}.video-card h3{font-size:18px;line-height:1.35;margin:6px 0}.video-card p,.live-card p,.topic-card p,.anchor-card p,.tutorial-card p,.feature-story p{color:var(--text-2);margin:6px 0 10px}.meta-line,.byline,.related-line{display:flex;justify-content:space-between;gap:10px;color:var(--text-3);font-size:12px}.byline{margin-top:10px}.one-plus-four{display:grid;grid-template-columns:1.25fr .75fr;gap:20px}.one-plus-four .feature-large .media-thumb img{aspect-ratio:16/10}.quad-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.video-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.video-grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.horizontal-track,.anchor-rail{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(260px,31%);overflow-x:auto;gap:18px;padding-bottom:8px;scrollbar-width:thin}.anchor-rail{grid-auto-columns:minmax(280px,34%)}.two-column-feed{display:grid;grid-template-columns:1fr 1fr;gap:26px}.stack-list{display:grid;gap:14px}.rank-row{display:grid;grid-template-columns:44px 1fr auto;gap:14px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}.rank-num{font-size:28px;font-weight:900;color:var(--primary)}.rank-row h3{margin:0;font-size:17px}.rank-row small{color:var(--text-3)}.feature-split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.feature-split img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:26px}.bento-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;grid-auto-rows:230px;gap:16px}.bento-item{position:relative;border-radius:24px;overflow:hidden}.bento-item:first-child{grid-row:span 2}.bento-item img{width:100%;height:100%;object-fit:cover}.bento-copy{position:absolute;inset:auto 0 0;padding:50px 18px 18px;color:#fff;background:linear-gradient(transparent,rgba(15,42,61,.85))}.bento-copy h3{margin:0}.live-stage{display:grid;grid-template-columns:1.25fr .75fr;gap:20px}.live-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;overflow:hidden}.section-dark .live-card{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.12)}.live-cover{position:relative}.live-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}.live-badge{position:absolute;left:12px;top:12px;background:var(--accent);color:#fff;border-radius:999px;padding:5px 9px;font-size:12px;font-weight:900}.live-card .card-body{padding:14px}.live-card h3{margin:5px 0}.anchor-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.anchor-card{display:grid;grid-template-columns:82px 1fr;gap:14px;padding:16px;background:var(--surface-blue);border-radius:18px;border:1px solid var(--line)}.avatar{width:82px;height:82px;border-radius:50%;object-fit:cover}.anchor-top{display:flex;justify-content:space-between;gap:12px}.anchor-top h3{margin:0}.status-dot{font-size:12px;color:var(--accent);font-weight:900}.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.topic-card{padding:18px;border-radius:18px;background:var(--surface);border:1px solid var(--line)}.topic-user{display:flex;align-items:center;gap:10px}.avatar-letter{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--sky-soft);font-weight:900;color:var(--primary)}.topic-user small{display:block;color:var(--text-3)}.topic-card h3{margin:12px 0 6px}.related-line{justify-content:flex-start;flex-wrap:wrap;padding:9px 0}.feature-story{display:grid;grid-template-columns:.8fr 1.2fr;gap:18px;align-items:center}.feature-story img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:18px}.feature-story h3{font-size:25px;margin:5px 0}.feature-story blockquote{margin:12px 0 0;padding:10px 14px;border-left:3px solid var(--primary);background:var(--sky-soft);color:var(--navy)}.editorial-note{padding:32px;border-radius:26px;background:var(--cream-2);border:1px solid var(--line-warm);display:grid;grid-template-columns:.75fr 1.25fr;gap:28px}.trend-table{display:grid;gap:4px}.trend-row{display:grid;grid-template-columns:42px 1fr 90px 90px;gap:16px;padding:13px 12px;border-radius:12px}.trend-row:nth-child(odd){background:rgba(255,255,255,.72)}.tag-cloud{display:flex;gap:10px;flex-wrap:wrap}.tag-cloud a{padding:9px 14px;background:var(--surface);border:1px solid var(--line);border-radius:999px}.tutorial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.tutorial-card{padding:18px;border:1px solid var(--line);border-radius:18px;background:var(--surface-cream)}.tutorial-card h3{margin:6px 0}.app-showcase{display:grid;grid-template-columns:.75fr 1.25fr;gap:44px;align-items:center}.phone-stack{position:relative;min-height:480px}.phone-stack .app-img{width:68%;border-radius:28px;box-shadow:var(--shadow-hover)}.phone-stack .phone-img{position:absolute;width:52%;right:0;bottom:0;border-radius:28px;box-shadow:var(--shadow)}.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.service-card{padding:18px;border-radius:18px;background:var(--surface);border:1px solid var(--line)}.service-icon{font-size:26px;color:var(--primary)}.timeline{display:grid;gap:18px}.timeline-step{display:grid;grid-template-columns:48px 1fr;gap:15px}.timeline-step b{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:var(--primary);color:#fff}.faq-list{display:grid;gap:10px}.faq-item{border:1px solid var(--line);border-radius:16px;background:var(--surface);overflow:hidden}.faq-question{width:100%;display:flex;justify-content:space-between;gap:16px;text-align:left;border:0;background:transparent;padding:17px 18px;font-weight:800;color:var(--navy)}.faq-answer{padding:0 18px 17px;color:var(--text-2)}.faq-answer[hidden]{display:none!important}.info-pairs{display:grid;grid-template-columns:1fr 1fr;gap:16px}.info-block{padding:22px;border-radius:18px;background:var(--sky-soft)}.text-panel{max-width:860px}.text-panel h2{font-size:34px;margin:0 0 12px}.compact-list{display:grid;gap:0}.compact-row{display:grid;grid-template-columns:140px 1fr;gap:16px;padding:15px 0;border-bottom:1px solid var(--line)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}.contact-form{display:grid;gap:12px}.contact-form input,.contact-form textarea,.contact-form select{width:100%;border:1px solid var(--line-strong);border-radius:12px;padding:12px;background:#fff}.contact-form textarea{min-height:140px;resize:vertical}.empty-state{padding:34px;border:1px dashed var(--line-strong);border-radius:18px;text-align:center;background:var(--surface)}
.site-footer{background:var(--navy);color:#d7e5ee;padding:56px 0 26px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(5,1fr);gap:24px}.footer-grid h3{color:#fff;margin-top:0}.footer-grid a{display:block;margin:8px 0;color:#c1d5e2}.footer-brand p{max-width:320px;color:#a9c2d2}.brand-light{color:#fff}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.12);padding-top:18px;margin-top:26px;color:#9fb9ca;font-size:13px}.mobile-bottom-nav{display:none}.back-top{position:fixed;right:22px;bottom:24px;z-index:80;width:42px;height:42px;border:0;border-radius:50%;background:var(--navy);color:#fff;box-shadow:var(--shadow)}.back-top[hidden]{display:none!important}
@media(max-width:1050px){.desktop-nav{display:none}.header-actions{margin-left:auto}.hero-grid,.page-hero-grid,.live-stage,.one-plus-four,.feature-split,.app-showcase{grid-template-columns:1fr}.hero-media{max-width:760px}.service-grid{grid-template-columns:repeat(2,1fr)}.video-grid-4{grid-template-columns:repeat(2,1fr)}.video-grid-3,.tutorial-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(3,1fr)}.footer-brand{grid-column:1/-1}.bento-grid{grid-template-columns:1fr 1fr}.bento-item:first-child{grid-row:auto}.horizontal-track,.anchor-rail{grid-auto-columns:minmax(280px,58%)}}
@media(max-width:720px){.wrap{width:min(100% - 28px,var(--wrap))}.site-notice .wrap{display:block}.site-notice a{display:none}.header-row{height:64px}.brand span{display:none}.header-actions .icon-btn[href="ranking.php"],.header-actions .pill-btn{display:none}.mega-grid{grid-template-columns:1fr 1fr}.hero{padding:34px 0 50px}.hero h1,.page-hero h1{font-size:42px}.hero-grid{gap:28px}.floating-card{position:relative;right:auto;bottom:auto;width:100%;margin-top:12px}.hero-search,.search-form{grid-template-columns:1fr}.section-head{align-items:flex-start;display:block}.section-head .text-link{display:inline-block;margin-top:10px}section{padding:50px 0}.quad-grid,.video-grid-3,.video-grid-4,.two-column-feed,.anchor-grid,.topic-grid,.tutorial-grid,.info-pairs,.form-grid{grid-template-columns:1fr}.horizontal-track,.anchor-rail{grid-auto-columns:minmax(250px,82%)}.bento-grid{display:grid;grid-template-columns:1fr;grid-auto-rows:240px}.feature-story,.editorial-note{grid-template-columns:1fr}.trend-row{grid-template-columns:34px 1fr 60px}.trend-row>*:nth-child(4){display:none}.service-grid{grid-template-columns:1fr 1fr}.app-showcase{gap:22px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.footer-bottom{display:block}.mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:85;display:grid;grid-template-columns:repeat(5,1fr);background:rgba(255,253,248,.96);backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:7px 6px calc(7px + env(safe-area-inset-bottom));text-align:center;font-size:12px}.mobile-bottom-nav a{padding:5px}.site-footer{padding-bottom:86px}.back-top{bottom:80px}.page-hero img{aspect-ratio:16/10}.compact-row{grid-template-columns:1fr;gap:3px}.phone-stack{min-height:380px}}
.watch-player{width:100%;aspect-ratio:16/9;background:#0F2A3D;border-radius:24px;box-shadow:var(--shadow-hover)}