/* ===== tokens (Yuanbao design spec, 2026-10-27) ===== */
:root{
  --primary:#FF6A00; --primary-hover:#E05F00; --primary-bg:#FFF3EA;
  --accent-blue:#2D6BED; --accent-green:#00B368;
  --n900:#1A1A1A; --n700:#4A4A4A; --n500:#8A8A8A; --n300:#D8D8D8; --n100:#F5F5F5; --n50:#FAFAFA;
  --radius-sm:4px; --radius-md:8px; --radius-lg:14px; --radius-xl:20px;
  --shadow-sm:0 2px 8px rgba(0,0,0,.06);
  --shadow-md:0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:0 8px 24px rgba(0,0,0,.12);
  --space-xs:4px; --space-sm:8px; --space-md:16px; --space-lg:24px; --space-xl:48px; --space-2xl:80px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;color:var(--n900);background:var(--n50);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 64px}
@media(max-width:900px){.wrap{padding:0 24px}}
@media(max-width:640px){.wrap{padding:0 16px}}

/* nav */
.nav{position:sticky;top:0;z-index:60;background:rgba(250,250,250,.92);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--n300)}
.nav-in{display:flex;align-items:center;gap:20px;height:56px}
.logo{font-weight:800;font-size:17px;letter-spacing:-.2px;margin-right:auto;color:var(--n900)}
.logo span{color:var(--primary)}
.nav a.link{font-size:14px;color:var(--n700);font-weight:500;transition:color .16s}
.nav a.link:hover,.nav a.link.on{color:var(--primary)}

/* hero */
.hero{background:radial-gradient(900px 420px at 82% -20%,rgba(255,106,0,.20),transparent 62%),linear-gradient(160deg,#181C21 0%,#22272E 55%,#1B1F25 100%);color:#fff;padding:64px 0 56px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,106,0,.6),transparent)}
.kicker{font-size:12px;font-weight:800;letter-spacing:1.8px;color:var(--primary);text-transform:uppercase}
.hero h1{font-size:40px;font-weight:700;letter-spacing:-.8px;line-height:1.2;margin-top:10px}
.hero h1 span{color:var(--primary)}
.hero p{font-size:16px;color:#B9C1C9;margin-top:14px;max-width:760px;line-height:1.7}
.stats{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.stat{display:flex;align-items:baseline;gap:6px;padding:6px 14px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);font-size:12px;color:#C9D1D9}
.stat b{font-size:15px;color:#fff;font-weight:700}
@media(max-width:640px){.hero h1{font-size:32px}.hero{padding:44px 0 40px}.stats{overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}.stat{flex:0 0 auto}}

/* featured */
.featured{padding:48px 0 8px}
.featured-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px}
.featured-head h2{font-size:24px;font-weight:600;letter-spacing:-.3px}
.featured-head span{font-size:12px;color:var(--n500)}
.feat-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px}
.feat-side{display:grid;gap:24px}
.feat{position:relative;display:block;border-radius:var(--radius-lg);overflow:hidden;background:#111418;box-shadow:var(--shadow-md);transition:transform .2s ease,box-shadow .2s ease}
.feat:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.feat:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
.feat img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .3s ease}
.feat:hover img{transform:scale(1.03)}
.feat .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,12,16,0) 35%,rgba(10,12,16,.82) 100%)}
.feat .txt{position:absolute;left:0;right:0;bottom:0;padding:24px;color:#fff}
.feat .tags{display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap}
.feat .t{font-size:11px;font-weight:700;padding:3px 9px;border-radius:var(--radius-sm);background:rgba(255,106,0,.92);color:#fff}
.feat .t.ghost{background:rgba(255,255,255,.16);color:#fff}
.feat h3{font-size:24px;font-weight:600;letter-spacing:-.3px;line-height:1.3}
.feat p{font-size:14px;color:#C9D1D9;margin-top:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.feat .cta{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13.5px;font-weight:700;color:#fff;background:var(--primary);padding:8px 16px;border-radius:999px}
.feat.small .txt{padding:18px}
.feat.small h3{font-size:18px}
.feat.small p{display:none}
.feat.small .cta{display:none}
.feat-main{aspect-ratio:16/9}
.feat-sm{aspect-ratio:3/2}
@media(max-width:900px){
  .feat-grid{grid-template-columns:1fr}
  .feat-side{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .featured{padding:32px 0 0}
  .feat-side{grid-template-columns:1fr}
  .feat-main{aspect-ratio:16/10}
}

/* filters */
.filters{position:sticky;top:56px;z-index:50;background:rgba(250,250,250,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--n300);transition:box-shadow .2s ease}
.filters.stuck{box-shadow:var(--shadow-md)}
.filters .wrap{padding-top:12px;padding-bottom:12px}
.frow{display:flex;align-items:center;gap:8px;overflow-x:auto;scrollbar-width:none}
.frow+.frow{margin-top:8px}
.frow::-webkit-scrollbar{display:none}
.flabel{flex:0 0 auto;font-size:11px;font-weight:700;letter-spacing:.8px;color:var(--n500);text-transform:uppercase;margin-right:4px}
.chip{flex:0 0 auto;font:inherit;font-size:13px;font-weight:500;padding:6px 14px;border-radius:999px;border:1px solid var(--n300);background:#fff;color:var(--n700);cursor:pointer;transition:.16s;white-space:nowrap}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip.on{background:var(--primary);border-color:var(--primary);color:#fff}
.chip.on:hover{background:var(--primary-hover);border-color:var(--primary-hover)}
.chip:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

/* groups */
main{padding:8px 0 8px}
.group{padding-top:48px}
.group-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding-bottom:10px;border-bottom:2px solid var(--n900);cursor:pointer;user-select:none}
.group-head h2{font-size:24px;font-weight:600;letter-spacing:-.3px;display:flex;align-items:baseline;gap:10px}
.group-head .n{font-size:13px;font-weight:500;color:var(--n500)}
.group-head .toggle{font-size:12px;color:var(--n500);transition:transform .2s ease}
.group.closed .toggle{transform:rotate(-90deg)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:22px}
.group.closed .grid{display:none}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}}
@media(max-width:640px){.grid{grid-template-columns:1fr;gap:16px}}

/* card */
.card{background:#fff;border:1px solid var(--n300);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#C9CDD2}
.card:focus-visible{outline:2px solid var(--primary);outline-offset:3px;transform:translateY(-4px)}
.cover{aspect-ratio:3/2;background:var(--n100);position:relative;overflow:hidden}
.cover img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .3s ease}
.card:hover .cover img{transform:scale(1.03)}
.cover .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:34px;font-weight:800;letter-spacing:1px;color:#fff}
.cover .ph::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,.10) 25%,transparent 25%,transparent 50%,rgba(255,255,255,.10) 50%,rgba(255,255,255,.10) 75%,transparent 75%);background-size:18px 18px;opacity:.5}
.cover .ph span{position:relative;z-index:1;text-shadow:0 2px 12px rgba(0,0,0,.25)}
.g-sim{background:linear-gradient(135deg,#2D6BED,#0B3D91)}
.g-hw{background:linear-gradient(135deg,#00B368,#065F46)}
.g-ai{background:linear-gradient(135deg,#7C3AED,#4C1D95)}
.g-app{background:linear-gradient(135deg,#F59E0B,#B45309)}
.g-content{background:linear-gradient(135deg,#EC4899,#9D174D)}
.g-play{background:linear-gradient(135deg,#FF6A00,#B23C00)}
.pill{position:absolute;top:10px;left:10px;z-index:2;font-size:11px;font-weight:700;padding:3px 9px;border-radius:var(--radius-sm);background:rgba(17,20,24,.74);color:#fff;backdrop-filter:blur(6px)}
.pill.live{background:rgba(0,179,104,.94)}
.pill.live::before{content:"▶ ";font-size:9px}
.pill.paused{background:rgba(138,138,138,.94)}
.shots{position:absolute;bottom:10px;right:10px;z-index:2;font-size:11px;padding:2px 8px;border-radius:999px;background:rgba(17,20,24,.6);color:#E6EAEF;backdrop-filter:blur(6px)}
.body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.tagrow{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}
.tag{font-size:11px;font-weight:700;padding:2px 8px;border-radius:var(--radius-sm);background:var(--primary-bg);color:var(--primary)}
.card h3{font-size:18px;font-weight:600;letter-spacing:-.2px;line-height:1.4}
.card .desc{font-size:14px;color:var(--n500);line-height:1.6;margin-top:6px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.foot{margin-top:auto;padding-top:14px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:var(--n500)}
.foot .go{color:var(--primary);font-weight:700}
.card:hover .foot .go{text-decoration:underline}
.empty{padding:60px 0;text-align:center;color:var(--n500)}

footer.site{margin-top:56px;padding:26px 0 34px;border-top:1px solid var(--n300);color:var(--n500);font-size:13px;background:#fff}
footer.site .wrap{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center}

@media (prefers-reduced-motion: reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .card:hover,.feat:hover{transform:none}
  .card:hover .cover img,.feat:hover img{transform:none}
}
/* mobile overflow guard */
html,body{max-width:100%;overflow-x:hidden}
@media(max-width:640px){
  .nav-in{gap:14px;overflow-x:auto;scrollbar-width:none;padding-right:8px}
  .nav-in::-webkit-scrollbar{display:none}
  .nav a.link{font-size:13px;flex:0 0 auto}
  .logo{flex:0 0 auto}
  .hero p{font-size:15px}
  .feat h3{font-size:20px}
  .feat-main{aspect-ratio:4/3}
}
/* group distribution */
.dist{margin-top:20px;max-width:760px}
.stack{display:flex;height:8px;border-radius:999px;overflow:hidden;background:rgba(255,255,255,.10)}
.stack i{display:block;height:100%}
.legend{display:flex;flex-wrap:wrap;gap:10px 16px;margin-top:10px;font-size:11.5px;color:#9AA4AE}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend b{width:8px;height:8px;border-radius:2px;display:inline-block}
@media(max-width:640px){.legend{gap:8px 12px;font-size:11px}}