/* roulang page: index */
:root{
  --bg:#0A0E1A;
  --bg-2:#0D1226;
  --panel:rgba(18,26,48,.55);
  --cyan:#3FE0CF;
  --purple:#7C5CFF;
  --gold:#F5B942;
  --text:#E8EDF7;
  --muted:#9BA7C2;
  --dim:#6B7899;
  --line:rgba(63,224,207,.14);
  --line-2:rgba(124,92,255,.26);
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.4;
  background-image:
    radial-gradient(1px 1px at 22px 38px,rgba(255,255,255,.5),transparent),
    radial-gradient(1px 1px at 128px 92px,rgba(63,224,207,.45),transparent),
    radial-gradient(1px 1px at 68px 158px,rgba(124,92,255,.45),transparent);
  background-size:180px 200px;
}
header,main,footer{position:relative;z-index:1}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
h1,h2,h3,p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
section[id]{scroll-margin-top:88px}
button{font-family:inherit}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* header */
.site-head{position:sticky;top:0;z-index:50;background:rgba(10,14,26,.74);backdrop-filter:blur(14px) saturate(120%)}
.site-head::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,rgba(63,224,207,.45),rgba(124,92,255,.45),transparent)}
.head-in{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:15px;font-weight:800;color:#061019;letter-spacing:0;background:linear-gradient(140deg,var(--cyan),var(--purple));box-shadow:0 0 18px rgba(63,224,207,.35)}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.5px}
.nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;margin-left:6px}
.nav a{padding:9px 11px;border-radius:8px;font-size:14px;color:var(--muted);transition:color .2s,background .2s}
.nav a:hover,.nav a.is-on{color:var(--cyan);background:rgba(63,224,207,.08)}
.head-act{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.search{display:flex;align-items:center;background:rgba(18,26,48,.6);border:1px solid var(--line-2);border-radius:var(--r-sm);padding:2px;transition:border-color .2s,box-shadow .2s}
.search:focus-within{border-color:rgba(63,224,207,.5);box-shadow:0 0 0 3px rgba(63,224,207,.16)}
.search input{width:150px;padding:8px 10px;border:0;outline:none;background:transparent;color:var(--text);font:inherit;font-size:13.5px}
.search input::placeholder{color:var(--dim)}
.search button{padding:8px 12px;border:0;border-radius:8px;background:transparent;color:var(--cyan);font:inherit;font-size:13.5px;font-weight:600;cursor:pointer;transition:background .2s}
.search button:hover{background:rgba(63,224,207,.12)}
.burger{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:var(--r-sm);border:1px solid var(--line-2);background:rgba(18,26,48,.6);color:var(--text);font-size:17px;cursor:pointer}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border:1px solid transparent;border-radius:var(--r-sm);font-size:15px;font-weight:600;cursor:pointer;transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s,color .22s,filter .22s}
.btn-primary{color:#05101c;background:linear-gradient(100deg,var(--purple),var(--cyan));box-shadow:0 0 0 1px rgba(63,224,207,.4),0 8px 24px rgba(124,92,255,.35)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(63,224,207,.6),0 12px 32px rgba(124,92,255,.5)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{color:var(--cyan);background:rgba(18,26,48,.5);border-color:var(--line-2);box-shadow:inset 0 1px 0 rgba(255,255,255,.08)}
.btn-ghost:hover{color:#fff;border-color:var(--cyan);transform:translateY(-2px)}
.btn:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* hero */
.hero{position:relative;overflow:hidden;padding:76px 0 68px}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.3}
.hero-bg::after{content:"";position:absolute;inset:0;background:
  radial-gradient(880px 420px at 10% 0%,rgba(124,92,255,.3),transparent 66%),
  linear-gradient(90deg,rgba(10,14,26,.95),rgba(10,14,26,.76) 55%,rgba(13,18,38,.58))}
.hero-in{position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.kicker{display:inline-flex;align-items:center;padding:5px 13px;border-radius:999px;font-size:12.5px;letter-spacing:1px;color:var(--cyan);background:rgba(63,224,207,.1);border:1px solid rgba(63,224,207,.3)}
h1{margin-top:20px;font-size:clamp(30px,4vw,50px);font-weight:800;line-height:1.2;letter-spacing:-.5px}
h1 em{font-style:normal;background:linear-gradient(100deg,var(--cyan),var(--purple));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin-top:14px;font-size:17px;color:#c4cfe6}
.hero-lede{margin-top:16px;max-width:620px;font-size:15px;line-height:1.85;color:var(--muted)}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-panel{background:var(--panel);border:1px solid var(--line-2);border-radius:var(--r-lg);padding:20px;backdrop-filter:blur(14px) saturate(120%);box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 18px 50px rgba(6,10,22,.6)}
.panel-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.panel-head b{font-size:15px}
.panel-head span{font-size:12.5px;color:var(--dim)}
.slots{display:grid;gap:9px;margin-top:16px}
.slots li{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:11px 14px;border-radius:var(--r-sm);font-size:13.5px;background:rgba(10,14,26,.5);border:1px solid rgba(124,92,255,.18)}
.slots li span{color:var(--muted)}
.slots li b{font-weight:600;color:var(--cyan);font-variant-numeric:tabular-nums}
.slots li.is-now{border-color:rgba(63,224,207,.5);background:rgba(63,224,207,.09)}
.panel-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px;padding-top:16px;border-top:1px solid var(--line);text-align:center}
.panel-stats b{display:block;font-size:19px;color:var(--text);font-variant-numeric:tabular-nums}
.panel-stats span{font-size:12px;color:var(--dim)}

/* section base */
.sec{padding:84px 0;border-top:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:36px}
.sec-head h2{display:flex;align-items:center;gap:12px;font-size:clamp(23px,2.4vw,30px);font-weight:700;line-height:1.3;letter-spacing:-.3px}
.sec-head h2::before{content:"";flex:0 0 8px;width:8px;height:8px;border-radius:2px;background:linear-gradient(135deg,var(--cyan),var(--purple));transform:rotate(45deg);box-shadow:0 0 10px rgba(63,224,207,.55)}
.sec-head p{margin-top:12px;font-size:14.5px;color:var(--muted);line-height:1.8}

/* grids */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}

/* content calendar */
.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:12px}
.cal li{padding:16px 12px;text-align:center;border-radius:var(--r-md);background:var(--panel);border:1px solid var(--line-2);transition:transform .22s ease-out,border-color .22s,box-shadow .22s}
.cal li:hover{transform:translateY(-4px);border-color:rgba(63,224,207,.45);box-shadow:0 0 24px rgba(63,224,207,.18)}
.cal .cal-day{display:block;font-size:12px;letter-spacing:1px;color:var(--dim)}
.cal b{display:block;margin:8px 0 6px;font-size:14.5px}
.cal p{font-size:12.5px;line-height:1.65;color:var(--muted)}

/* topic cards */
.card{overflow:hidden;border-radius:var(--r-lg);background:var(--panel);border:1px solid var(--line-2);transition:transform .22s ease-out,border-color .22s,box-shadow .22s}
.card:hover{transform:translateY(-4px);border-color:rgba(63,224,207,.45);box-shadow:0 0 24px rgba(63,224,207,.2)}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0D1226}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .28s ease-out}
.card:hover .thumb img{transform:scale(1.04)}
.body{padding:16px 18px 18px}
.body h3{font-size:16px;font-weight:600;line-height:1.45}
.body p{margin-top:6px;font-size:13px;line-height:1.7;color:var(--muted)}

/* video cards */
.vcard{overflow:hidden;border-radius:var(--r-lg);background:var(--panel);border:1px solid var(--line-2);transition:transform .22s ease-out,border-color .22s,box-shadow .22s}
.vcard:hover{transform:translateY(-4px);border-color:rgba(63,224,207,.45);box-shadow:0 0 24px rgba(63,224,207,.2)}
.cover{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,var(--a,#1b2450),var(--b,#0e1730))}
.cover::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(255,255,255,.09),transparent 48%),radial-gradient(150px 90px at 82% 20%,rgba(63,224,207,.16),transparent 70%)}
.dur{position:absolute;right:10px;bottom:10px;padding:2px 9px;border-radius:999px;font-size:11.5px;color:#dff9f5;background:rgba(10,14,26,.74);border:1px solid rgba(63,224,207,.3);backdrop-filter:blur(6px);font-variant-numeric:tabular-nums}
.vcard .body{padding:14px 16px 16px}
.vcard h3{font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.meta{display:flex;gap:10px;margin-top:6px;font-size:12.5px;color:var(--dim);font-variant-numeric:tabular-nums}

/* latest compact cards */
.lcard{display:grid;grid-template-columns:132px 1fr;gap:14px;align-items:center;padding:12px;border-radius:var(--r-md);background:var(--panel);border:1px solid var(--line-2);transition:transform .22s ease-out,border-color .22s,box-shadow .22s}
.lcard:hover{transform:translateY(-3px);border-color:rgba(63,224,207,.45);box-shadow:0 0 22px rgba(63,224,207,.18)}
.lthumb{aspect-ratio:4/3;border-radius:8px;background:linear-gradient(135deg,var(--a,#1b2450),var(--b,#0e1730))}
.lcard h3{font-size:15px;font-weight:600}
.badge{display:inline-block;margin-top:8px;padding:2px 9px;border-radius:999px;font-size:11.5px;line-height:1.7}
.badge.hd{color:var(--cyan);background:rgba(63,224,207,.14);border:1px solid rgba(63,224,207,.3)}
.badge.bd{color:#b9a8ff;background:rgba(124,92,255,.16);border:1px solid rgba(124,92,255,.34)}
.badge.up{color:var(--gold);background:rgba(245,185,66,.14);border:1px solid rgba(245,185,66,.32)}

/* category channels */
.cat-wrap{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,3fr);gap:20px;align-items:start}
.cat-main,.cat-side{display:grid;gap:16px}
.cat{display:flex;flex-direction:column;gap:8px;padding:20px;border-radius:var(--r-lg);background:var(--panel);border:1px solid var(--line-2);transition:transform .22s ease-out,border-color .22s,box-shadow .22s}
.cat:hover{transform:translateY(-3px);border-color:rgba(63,224,207,.45);box-shadow:0 0 24px rgba(63,224,207,.18)}
.cat h3{font-size:17px;font-weight:600}
.cat p{font-size:13.5px;line-height:1.75;color:var(--muted)}
.cat a{margin-top:auto;padding-top:6px;font-size:13.5px;font-weight:600;color:var(--cyan)}
.cat a:hover{color:#fff}

/* rank */
.rank li{display:grid;grid-template-columns:48px minmax(0,1fr) auto auto auto;align-items:center;gap:16px;min-height:52px;padding:8px 14px;border-radius:var(--r-sm);font-size:14.5px;transition:background .2s}
.rank li:hover{background:rgba(63,224,207,.07)}
.no{text-align:center;font-size:17px;font-weight:700;color:var(--dim);font-variant-numeric:tabular-nums}
.rank li:nth-child(-n+3) .no{font-size:22px;color:var(--gold);text-shadow:0 0 14px rgba(245,185,66,.55)}
.t{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-weight:500}
.tag{padding:2px 9px;border-radius:999px;font-size:12px;color:var(--muted);background:rgba(124,92,255,.12);border:1px solid rgba(124,92,255,.3);white-space:nowrap}
.v,.s{font-size:13.5px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.s{color:var(--gold);font-weight:600}

/* opinion */
.op{padding:22px;border-radius:var(--r-md);background:rgba(18,26,48,.5);border:1px solid var(--line-2);border-left:3px solid rgba(63,224,207,.5);transition:border-left-color .2s,transform .22s ease-out}
.op:hover{transform:translateY(-3px);border-left-color:var(--cyan)}
.op h3{font-size:16px;font-weight:600;line-height:1.5}
.op p{margin-top:10px;font-size:13.5px;line-height:1.8;color:var(--muted)}

/* news */
.news{display:grid;grid-template-columns:repeat(2,1fr);gap:0 36px}
.news li{display:grid;grid-template-columns:96px 1fr;grid-template-rows:auto auto;column-gap:14px;row-gap:2px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}
.nthumb{grid-row:1 / span 2;aspect-ratio:4/3;border-radius:8px;background:linear-gradient(135deg,var(--a,#1b2450),var(--b,#0e1730))}
.news h3{font-size:14.5px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:color .2s}
.news li:hover h3{color:var(--cyan)}
.news time{font-size:12.5px;color:var(--dim);font-variant-numeric:tabular-nums}

/* metrics */
.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:24px 44px}
.metric b{font-size:14.5px;font-weight:600}
.metric span{float:right;font-size:13px;color:var(--cyan);font-variant-numeric:tabular-nums}
.bar{margin-top:10px;height:8px;border-radius:999px;background:rgba(124,92,255,.14);overflow:hidden}
.bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--cyan),var(--purple));box-shadow:0 0 12px rgba(63,224,207,.5)}

/* guard */
.guard{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.guard li{padding:22px 18px;text-align:center;border-radius:var(--r-md);background:var(--panel);border:1px solid var(--line-2);transition:transform .22s ease-out,border-color .22s}
.guard li:hover{transform:translateY(-3px);border-color:rgba(63,224,207,.45)}
.ic{display:grid;place-items:center;width:40px;height:40px;margin:0 auto 14px;border-radius:12px;font-size:15px;font-weight:700;color:var(--cyan);background:rgba(63,224,207,.1);border:1px solid rgba(63,224,207,.3)}
.guard b{display:block;font-size:15px;margin-bottom:8px}
.guard p{font-size:13px;line-height:1.75;color:var(--muted)}

/* voices */
.voices{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.voices li{padding:22px;border-radius:var(--r-lg);background:var(--panel);border:1px solid var(--line-2)}
.voices li:nth-child(2){margin-top:16px}
.voices p{font-size:14px;line-height:1.85;color:#c8d3e8}
.who{display:flex;align-items:center;gap:10px;margin-top:16px}
.av{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;font-size:13px;font-weight:700;color:#071120;background:linear-gradient(140deg,var(--purple),var(--cyan))}
.who b{display:block;font-size:13.5px}
.who span{font-size:12px;color:var(--dim)}

/* faq */
.faq{display:grid;gap:12px;max-width:880px}
.faq details{padding:0 20px;border-radius:var(--r-md);background:var(--panel);border:1px solid var(--line-2);transition:border-color .2s,box-shadow .2s}
.faq details[open]{border-color:rgba(63,224,207,.4);box-shadow:0 0 24px rgba(63,224,207,.14)}
.faq summary{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:56px;padding:16px 0;font-size:15px;font-weight:500;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:0 0 auto;font-size:20px;line-height:1;color:var(--cyan);transition:transform .22s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{padding:0 0 18px;font-size:14px;line-height:1.85;color:var(--muted)}

/* subscribe */
.sub{position:relative;overflow:hidden;padding:48px 40px;border-radius:20px;border:1px solid var(--line-2);background:var(--panel);box-shadow:inset 0 1px 0 rgba(255,255,255,.08)}
.sub-bg{position:absolute;inset:0;z-index:0}
.sub-bg img{width:100%;height:100%;object-fit:cover;opacity:.22}
.sub-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(13,18,38,.96),rgba(10,14,26,.7))}
.sub-in{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px}
.sub-in h2{font-size:clamp(21px,2.2vw,27px);font-weight:700}
.sub-in p{margin-top:8px;font-size:14.5px;color:var(--muted)}

/* footer */
.site-foot{padding:72px 0 36px;background:rgba(13,18,38,.6);border-top:1px solid var(--line)}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}
.foot-grid h3{margin-bottom:16px;font-size:14px;font-weight:600;color:var(--text)}
.foot-grid ul{display:grid;gap:10px}
.foot-grid p,.foot-grid a{font-size:13.5px;line-height:1.75;color:var(--muted)}
.foot-grid a:hover{color:var(--cyan)}
.foot-brand p{margin-top:14px;max-width:280px}
.social{display:flex;gap:10px;margin-top:18px}
.social li{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;font-size:13px;color:var(--muted);background:rgba(18,26,48,.7);border:1px solid var(--line-2);transition:color .2s,border-color .2s}
.social li:hover{color:var(--cyan);border-color:rgba(63,224,207,.45)}
.copy{margin-top:48px;padding-top:22px;border-top:1px solid var(--line);text-align:center;font-size:12.5px;color:var(--dim)}

@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(3,1fr)}
  .hero-in{grid-template-columns:1fr;gap:36px}
  .hero-panel{max-width:560px}
  .hero-lede{max-width:none}
  .cal{grid-template-columns:repeat(4,1fr)}
  .guard{grid-template-columns:repeat(2,1fr)}
  .cat-wrap{grid-template-columns:1fr}
  .sec{padding:72px 0}
  .search input{width:118px}
  .nav a{padding:9px 8px;font-size:13.5px}
  .sub{padding:40px 28px}
}
@media (max-width:768px){
  .nav{position:fixed;top:72px;left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:0;margin:0;padding:8px 24px 24px;background:rgba(10,14,26,.97);backdrop-filter:blur(18px);border-bottom:1px solid var(--line-2);z-index:49}
  .nav.open{display:flex}
  .nav a{display:flex;align-items:center;min-height:52px;padding:0 8px;font-size:15px;border-bottom:1px solid var(--line);border-radius:0}
  .burger{display:flex}
  .search,.head-act .btn-primary{display:none}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .news{grid-template-columns:1fr}
  .cal{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:1fr}
  .voices{grid-template-columns:1fr}
  .voices li:nth-child(2){margin-top:0}
  .rank .tag{display:none}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .lcard{grid-template-columns:112px 1fr}
  .sec{padding:56px 0}
  .hero{padding:56px 0 48px}
  h1{font-size:32px}
}
@media (max-width:520px){
  .wrap{padding:0 18px}
  .grid-3{grid-template-columns:1fr}
  .guard{grid-template-columns:1fr}
  .cal{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  h1{font-size:29px}
  .hero-btns{flex-direction:column}
  .hero-btns .btn{width:100%}
  .rank li{grid-template-columns:36px minmax(0,1fr) auto}
  .rank .v{display:none}
  .sub{padding:32px 20px}
  .sub-in{flex-direction:column;align-items:flex-start}
  .sub-in .btn{width:100%}
}