:root{--primary:#6C63FF;--secondary:#A78BFA;--dark:#171821;--bg:#F7F7FA;--soft:#ECECF3;--text:#22232B;--muted:#6F7280;--accent:#F59E5B;--white:#fff;--border:#dcdce8;--radius:22px;--shadow:0 18px 45px rgba(23,24,33,.10);--max:1180px}
*{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,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.shell{width:min(var(--max),calc(100% - 40px));margin-inline:auto}.skip-link{position:fixed;top:-80px;left:16px;z-index:999;background:var(--white);padding:10px 14px;border-radius:8px;box-shadow:var(--shadow)}.skip-link:focus{top:16px}.site-header{position:sticky;top:0;z-index:100;background:rgba(23,24,33,.96);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08)}.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;letter-spacing:.02em}.brand img{width:38px;height:38px;object-fit:contain;border-radius:10px}.site-nav{display:flex;gap:8px;align-items:center}.site-nav a{color:#d9d9e6;padding:9px 13px;border-radius:12px;font-size:15px}.site-nav a:hover,.site-nav a:focus-visible,.site-nav a[aria-current="page"]{color:#fff;background:rgba(108,99,255,.22)}.menu-toggle{display:none;background:transparent;color:#fff;border:1px solid rgba(255,255,255,.2);border-radius:10px;padding:8px 11px}.dark-panel{background:var(--dark);color:#fff}.hero{padding:72px 0 64px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:54px;align-items:center}.hero-copy h1,.page-intro h1{font-size:clamp(40px,6vw,72px);line-height:1.08;letter-spacing:-.04em;margin:10px 0 22px}.page-intro h1{font-size:clamp(36px,5vw,58px)}.lead{font-size:18px;color:#c9cad6;max-width:760px}.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:12px;font-weight:800;color:var(--secondary);margin:0 0 8px}.hero-media img,.intro-grid img{border-radius:28px;aspect-ratio:4/3;object-fit:cover;box-shadow:0 26px 70px rgba(0,0,0,.35)}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:30px 0 24px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:13px;border:1px solid transparent;font-weight:800;cursor:pointer}.btn.primary{background:var(--primary);color:#fff}.btn.secondary{background:var(--white);border-color:var(--border)}.btn.ghost{color:#fff;border-color:rgba(255,255,255,.22);background:rgba(255,255,255,.04)}.btn:hover{transform:translateY(-1px)}.btn.full{width:100%}.hero-points{display:flex;gap:18px;flex-wrap:wrap;padding:0;margin:0;list-style:none;color:#aeb0bf;font-size:14px}.hero-points li::before{content:"•";color:var(--accent);margin-right:7px}.section{padding:76px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:30px}.section-heading h2,.split-feature h2,.dark-strip h2,.two-col h2,.strip-grid h2{font-size:clamp(28px,4vw,44px);line-height:1.15;letter-spacing:-.03em;margin:4px 0 0}.text-link{color:var(--primary);font-weight:800}.card-grid{display:grid;gap:20px}.card-grid-4{grid-template-columns:repeat(4,1fr)}.media-card{background:#fff;border:1px solid var(--border);border-radius:20px;overflow:hidden;box-shadow:0 12px 30px rgba(23,24,33,.05)}.media-card img{width:100%;aspect-ratio:16/10;object-fit:cover}.card-body{padding:18px}.card-body h3,.library-item h3,.note h3{margin:10px 0 8px;line-height:1.35}.card-body p,.library-item p,.note p{color:var(--muted);margin:0 0 12px}.card-body a{color:var(--primary);font-weight:800}.badges{display:flex;gap:6px;flex-wrap:wrap}.badge{display:inline-flex;padding:4px 8px;border-radius:999px;background:var(--soft);font-size:12px;color:#56596a}.soft-section{background:var(--soft)}.split-feature{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}.split-feature.reverse{grid-template-columns:.9fr 1.1fr}.split-feature img{border-radius:24px;width:100%;aspect-ratio:16/11;object-fit:cover}.split-feature p{color:var(--muted);font-size:17px}.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}.mini-grid div{background:#fff;border:1px solid var(--border);border-radius:16px;padding:16px}.mini-grid strong,.mini-grid span{display:block}.mini-grid span{font-size:14px;color:var(--muted);margin-top:4px}.note-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.note{background:#fff;border:1px solid var(--border);border-radius:18px;padding:20px}.dark-strip{background:#20212c;color:#fff}.strip-grid{display:flex;align-items:center;justify-content:space-between;gap:40px}.strip-grid>div{max-width:760px}.strip-grid p{color:#c8c9d4}.faq-list{display:grid;gap:10px;max-width:920px}.faq-list details{background:#fff;border:1px solid var(--border);border-radius:16px;padding:0 18px}.faq-list summary{cursor:pointer;font-weight:800;padding:17px 0}.faq-list p{color:var(--muted);margin:0 0 18px}.page-intro{padding:58px 0}.page-intro.compact{padding:46px 0}.intro-grid{display:grid;grid-template-columns:1.1fr .7fr;gap:48px;align-items:center}.watch-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:34px;align-items:start}.filter-panel{position:sticky;top:94px;background:#fff;border:1px solid var(--border);border-radius:18px;padding:18px}.filter-panel form{display:grid;gap:10px}.filter-panel label{font-size:13px;font-weight:800;margin-top:2px}.filter-panel input,.filter-panel select{width:100%;border:1px solid var(--border);border-radius:12px;padding:11px 12px;background:#fff;color:var(--text)}.filter-panel input:focus,.filter-panel select:focus{outline:3px solid rgba(108,99,255,.16);border-color:var(--primary)}.reset-link{text-align:center;color:var(--primary);font-size:14px}.filter-help{border-top:1px solid var(--border);margin-top:18px;padding-top:16px}.filter-help p{font-size:14px;color:var(--muted);margin-bottom:0}.results-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}.results-head h2{margin:0;font-size:30px}.results-head span{color:var(--muted);font-size:14px}.library-grid{display:grid;gap:16px}.library-item{display:grid;grid-template-columns:210px 1fr;gap:20px;background:#fff;border:1px solid var(--border);border-radius:20px;padding:14px;scroll-margin-top:100px}.library-item img{width:100%;height:100%;min-height:190px;object-fit:cover;border-radius:14px}.library-item dl{display:flex;gap:18px;flex-wrap:wrap;margin:12px 0}.library-item dl div{display:flex;gap:6px}.library-item dt{font-weight:800}.library-item dd{margin:0;color:var(--muted)}.library-item details{border-top:1px solid var(--border);padding-top:10px}.library-item summary{cursor:pointer;color:var(--primary);font-weight:800}.empty-state{background:#fff;border:1px dashed #b9bbcc;border-radius:20px;padding:40px;text-align:center}.two-col{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}.two-col p{color:var(--muted);font-size:17px}.fact-stack{display:grid;gap:12px}.fact-stack article{background:#fff;border:1px solid var(--border);border-radius:17px;padding:18px}.fact-stack strong,.fact-stack span{display:block}.fact-stack span{color:var(--muted);margin-top:4px}.device-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.device-grid article{background:#fff;border:1px solid var(--border);border-radius:20px;overflow:hidden}.device-grid img{width:100%;aspect-ratio:16/10;object-fit:cover}.device-grid h2,.device-grid p{margin-left:18px;margin-right:18px}.device-grid p{color:var(--muted);margin-bottom:20px}.checklist{display:grid;gap:10px}.checklist span{background:#fff;border:1px solid var(--border);border-radius:12px;padding:12px 14px}.error-page{min-height:60vh;display:flex;flex-direction:column;justify-content:center;align-items:flex-start}.error-page h1{font-size:clamp(46px,8vw,88px);margin:0}.error-page>p{max-width:680px;color:var(--muted)}.site-footer{background:#111219;color:#d4d5df;padding:44px 0}.footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:26px}.site-footer p{color:#9fa1b0;max-width:600px}.site-footer nav{display:flex;flex-wrap:wrap;gap:12px;align-content:start}.site-footer nav a{padding:7px 10px;border:1px solid rgba(255,255,255,.09);border-radius:10px}.footer-note{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.08);padding-top:18px;font-size:13px}.back-top{position:fixed;right:18px;bottom:18px;width:44px;height:44px;border-radius:50%;border:0;background:var(--primary);color:#fff;font-weight:800;box-shadow:var(--shadow);cursor:pointer;opacity:0;pointer-events:none;transition:.2s}.back-top.show{opacity:1;pointer-events:auto}:focus-visible{outline:3px solid rgba(245,158,91,.65);outline-offset:3px}
@media (max-width:1000px){.card-grid-4{grid-template-columns:repeat(2,1fr)}.note-grid{grid-template-columns:repeat(2,1fr)}.hero-grid,.split-feature,.split-feature.reverse,.intro-grid,.two-col{grid-template-columns:1fr}.hero-media{max-width:760px}.watch-layout{grid-template-columns:1fr}.filter-panel{position:static}.device-grid{grid-template-columns:1fr 1fr}.intro-grid img{max-width:620px}}
@media (max-width:760px){.shell{width:min(100% - 28px,var(--max))}.header-inner{min-height:64px}.menu-toggle{display:block}.site-nav{position:absolute;left:14px;right:14px;top:70px;display:none;flex-direction:column;align-items:stretch;background:#22232e;padding:10px;border-radius:15px;box-shadow:var(--shadow)}.site-nav.open{display:flex}.site-nav a{padding:12px}.hero{padding:50px 0}.hero-grid{gap:32px}.hero-copy h1,.page-intro h1{font-size:38px}.section{padding:54px 0}.card-grid-4,.note-grid,.device-grid{grid-template-columns:1fr}.section-heading,.strip-grid{align-items:flex-start;flex-direction:column}.library-item{grid-template-columns:1fr}.library-item img{max-height:260px}.mini-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-note{grid-column:auto}.results-head{align-items:flex-start;flex-direction:column}.hero-points{display:grid;gap:6px}.page-intro{padding:44px 0}}
@media (max-width:430px){.shell{width:min(100% - 22px,var(--max))}.hero-copy h1,.page-intro h1{font-size:34px}.lead{font-size:16px}.btn{width:100%}.actions{display:grid}.card-body,.note{padding:16px}.section-heading h2,.split-feature h2,.dark-strip h2,.two-col h2,.strip-grid h2{font-size:28px}.library-item{padding:10px}.filter-panel{padding:14px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}

.u-gap-1{gap:2px}
.u-gap-2{gap:4px}
.u-gap-3{gap:6px}
.u-gap-4{gap:8px}
.u-gap-5{gap:10px}
.u-gap-6{gap:12px}
.u-gap-7{gap:14px}
.u-gap-8{gap:16px}
.u-gap-9{gap:18px}
.u-gap-10{gap:20px}
.u-gap-11{gap:22px}
.u-gap-12{gap:24px}
@media print{.site-header,.site-footer,.menu-toggle,.filter-panel,.actions,.back-top{display:none!important}body{background:#fff;color:#000}.section,.page-intro,.hero{padding:18px 0}.dark-panel,.dark-strip{background:#fff!important;color:#000!important}.lead,.dark-strip p{color:#333}.shell{width:100%;max-width:none}.media-card,.library-item,.note,.fact-stack article,.device-grid article{break-inside:avoid;box-shadow:none}}