/* roulang page: index */
:root{
--bg:#060A16;--panel:#0C1424;
--glass:rgba(255,255,255,.045);
--line:rgba(120,190,255,.16);--line2:rgba(120,190,255,.10);
--cyan:#23D3EE;--amber:#FFB257;
--text:#E8EFF9;--sub:#93A3BC;--muted:#66799A;
--r:14px;--rb:10px;
--sh:0 18px 40px rgba(0,0,0,.45);
--shh:0 24px 56px rgba(0,0,0,.6);
--mono:ui-monospace,"DIN Alternate",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
h1,h2,h3{margin:0;font-weight:700;letter-spacing:-.5px;line-height:1.2}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;border-radius:10px}
a{color:inherit;text-decoration:none;transition:color .2s}
a:hover{color:var(--cyan);text-decoration:underline;text-underline-offset:4px}
input{font:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{position:relative;padding:88px 0;border-top:1px solid var(--line2)}
section[id]{scroll-margin-top:84px}
.sec-head{margin-bottom:36px;max-width:760px}
.eyebrow{display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:2px;color:var(--cyan);margin-bottom:10px}
h2{font-size:clamp(22px,2.4vw,32px)}
.sec-head p{margin-top:12px;color:var(--sub);font-size:15px}
.sec-alt{background:var(--panel)}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--glass);border:1px solid var(--line);border-radius:var(--r);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:var(--sh);transition:border-color .25s,box-shadow .25s,transform .25s}
.card:hover{border-color:rgba(35,211,238,.45);box-shadow:var(--shh);transform:translateY(-3px)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 22px;border-radius:var(--rb);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:filter .2s,transform .2s,box-shadow .2s,background .2s}
.btn:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.btn-primary{background:linear-gradient(120deg,#23D3EE,#2C8BFF);color:#04121C;box-shadow:0 0 24px rgba(35,211,238,.40)}
.btn-primary:hover{filter:brightness(1.12);transform:translateY(-1px);box-shadow:0 0 36px rgba(35,211,238,.5);color:#04121C;text-decoration:none}
.btn-ghost{background:transparent;border-color:rgba(35,211,238,.55);color:var(--cyan)}
.btn-ghost:hover{background:rgba(35,211,238,.12);color:var(--cyan);text-decoration:none}
.tag{display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:999px;font-size:12px;background:rgba(147,163,188,.16);color:var(--sub);border:1px solid rgba(147,163,188,.22);white-space:nowrap}
.tag-hot{background:var(--amber);color:#160E02;border-color:transparent;font-weight:700}
.tag-pick{background:transparent;color:var(--cyan);border-color:rgba(35,211,238,.55)}
.meta{display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:12px;letter-spacing:1px;color:var(--muted)}
.nav-toggle{position:absolute;width:0;height:0;opacity:0;pointer-events:none}
.site-header{position:sticky;top:0;z-index:60;background:rgba(6,10,22,.74);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid var(--line2)}
.hd-inner{display:flex;align-items:center;gap:22px;height:76px;transition:height .25s}
.site-header.scrolled .hd-inner{height:60px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand:hover{text-decoration:none}
.brand-mark{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:20px;font-weight:700;color:var(--cyan);background:rgba(35,211,238,.10);border:1px solid rgba(35,211,238,.5);box-shadow:0 0 18px rgba(35,211,238,.28)}
.brand-name{font-size:17px;font-weight:700;letter-spacing:-.5px;white-space:nowrap}
.nav{display:flex;gap:20px;margin-left:auto}
.nav a{font-size:14px;color:var(--sub);padding:6px 2px;border-bottom:2px solid transparent;white-space:nowrap}
.nav a:hover{color:var(--text);text-decoration:none;border-bottom-color:rgba(35,211,238,.5)}
.nav a.on{color:var(--text);border-bottom-color:var(--cyan);box-shadow:0 6px 16px -10px var(--cyan)}
.hd-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.hd-search input{width:170px;height:38px;padding:0 14px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--text);font-size:13px;outline:none}
.hd-search input::placeholder{color:var(--muted)}
.hd-search input:focus{border-color:rgba(35,211,238,.6);box-shadow:0 0 0 3px rgba(35,211,238,.14)}
.hd-cta{min-height:38px;padding:0 18px;font-size:14px}
.burger{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);align-items:center;justify-content:center;font-size:20px;color:var(--cyan);cursor:pointer}
.mask{position:fixed;inset:0;background:rgba(3,6,14,.66);opacity:0;visibility:hidden;transition:.28s;z-index:70}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);background:var(--panel);border-left:1px solid var(--line);z-index:80;padding:24px;display:flex;flex-direction:column;gap:6px;transform:translateX(102%);transition:transform .3s}
.drawer .dr-close{width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--line);border-radius:10px;align-self:flex-end;color:var(--cyan);cursor:pointer;font-size:18px}
.drawer a.dr-link{display:flex;align-items:center;min-height:46px;padding:0 4px;border-bottom:1px solid var(--line2);font-size:15px;color:var(--sub)}
.drawer .btn{margin-top:18px;width:100%}
#navToggle:checked ~ .drawer{transform:none}
#navToggle:checked ~ .mask{opacity:1;visibility:visible}
#hero{border-top:0;padding:84px 0 88px;overflow:hidden;background:linear-gradient(180deg,rgba(12,20,36,.92),rgba(6,10,22,0))}
#hero::before{content:"";position:absolute;inset:0;background:radial-gradient(560px 320px at 16% 10%,rgba(35,211,238,.18),transparent 70%),radial-gradient(500px 320px at 90% 82%,rgba(35,211,238,.10),transparent 72%);pointer-events:none}
#hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(120,190,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(120,190,255,.07) 1px,transparent 1px);background-size:64px 64px;-webkit-mask-image:radial-gradient(70% 62% at 50% 42%,#000,transparent);mask-image:radial-gradient(70% 62% at 50% 42%,#000,transparent);pointer-events:none}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
h1{font-size:clamp(30px,4.2vw,52px);line-height:1.15}
h1 .hl{color:var(--cyan)}
.hero-sub{font-size:clamp(16px,1.6vw,20px);color:var(--sub);margin:18px 0 12px}
.hero-p{max-width:560px;color:var(--sub);font-size:15px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.hero-visual{padding:14px}
.hero-visual img{width:100%;aspect-ratio:16/9;object-fit:cover}
.term{margin-top:14px;display:grid;gap:8px;font-family:var(--mono);font-size:12.5px;letter-spacing:.4px}
.term li{display:flex;gap:8px;align-items:baseline;color:var(--sub);padding-top:8px;border-top:1px dashed rgba(120,190,255,.14)}
.term li:first-child{border-top:0;padding-top:0}
.term .pr{color:var(--cyan)}
.term em{margin-left:auto;font-style:normal;color:var(--muted);white-space:nowrap}
.pain-item{padding:24px;display:flex;gap:16px}
.pain-ico{flex:0 0 40px;width:40px;height:40px;border-radius:10px;display:grid;place-items:center;color:var(--cyan);border:1px solid rgba(35,211,238,.42);background:rgba(35,211,238,.08);font-family:var(--mono);font-size:15px}
.pain-item h3{font-size:16px;margin-bottom:6px}
.pain-item p{font-size:14.5px;color:var(--sub)}
.split{display:grid;grid-template-columns:1fr .9fr;gap:44px;align-items:center}
.split-body p+p{margin-top:14px}
.split-body p{color:var(--sub);font-size:15px}
.points{margin-top:26px;display:grid;gap:14px}
.points li{display:flex;gap:14px;align-items:flex-start;padding:12px 14px;border:1px solid var(--line);border-radius:var(--rb);background:rgba(255,255,255,.03)}
.points .no{font-family:var(--mono);font-size:13px;color:var(--cyan);border:1px solid rgba(35,211,238,.45);border-radius:6px;padding:1px 6px;letter-spacing:1px}
.points b{display:block;font-size:15px}
.points span.d{font-size:14px;color:var(--sub)}
.split-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line);box-shadow:var(--sh)}
.step{padding:26px;position:relative}
.step-no{font-family:var(--mono);font-size:34px;font-weight:700;color:transparent;-webkit-text-stroke:1px rgba(35,211,238,.55);letter-spacing:1px;line-height:1}
.step h3{font-size:17px;margin:14px 0 8px}
.step p{font-size:14.5px;color:var(--sub)}
.step-act{display:inline-block;margin-top:16px;font-size:14px;color:var(--cyan);border-bottom:1px solid rgba(35,211,238,.4);padding-bottom:2px}
.board{padding:24px}
.board h3{font-size:17px;margin-bottom:8px}
.board p{font-size:14px;color:var(--sub);min-height:62px}
.board .cnt{display:block;margin-top:12px;font-family:var(--mono);font-size:12.5px;letter-spacing:1px;color:var(--muted)}
.board:hover h3{color:var(--cyan)}
.more{display:flex;justify-content:flex-end;margin-top:24px}
.more a{font-size:14px;color:var(--cyan);border-bottom:1px solid rgba(35,211,238,.4);padding-bottom:2px}
.post{overflow:hidden;padding:0;display:flex;flex-direction:column}
.thumb{position:relative}
.thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0}
.thumb .tag{position:absolute;left:10px;top:10px}
.thumb .tag-hot,.thumb .tag-pick{left:auto;right:10px}
.post-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{font-size:16px;line-height:1.45}
.post-body .meta{margin-top:auto}
.feature{overflow:hidden;padding:0;display:grid;grid-template-columns:40% 1fr}
.feature img{width:100%;height:100%;object-fit:cover;border-radius:0}
.feature-body{padding:18px;display:flex;flex-direction:column;gap:10px}
.feature-body h3{font-size:17px;line-height:1.4}
.feature-body p{font-size:14px;color:var(--sub)}
.feature-body .byline{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-top:auto}
.rank-wrap{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 28px}
.rank-row{display:flex;align-items:center;gap:14px;padding:14px 10px;border-bottom:1px solid var(--line2);min-height:56px}
.rank-row:hover{background:rgba(35,211,238,.06);border-radius:8px}
.rank-no{flex:0 0 40px;font-family:var(--mono);font-size:24px;font-weight:700;letter-spacing:1px;color:transparent;-webkit-text-stroke:1px rgba(35,211,238,.5);line-height:1}
.rank-row.top .rank-no{-webkit-text-stroke-color:rgba(255,178,87,.85)}
.rank-title{font-size:15px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rank-heat{font-family:var(--mono);font-size:12.5px;color:var(--muted);letter-spacing:1px;white-space:nowrap}
.stat{padding:26px 24px;border-left:1px solid rgba(35,211,238,.28)}
.stat .num{font-family:var(--mono);font-size:clamp(32px,4vw,48px);font-weight:700;letter-spacing:1px;color:var(--text);line-height:1.1}
.stat .lab{display:block;margin-top:6px;font-size:14px;color:var(--sub)}
.stat .dsr{display:block;margin-top:4px;font-size:13px;color:var(--muted)}
.voice{padding:26px;position:relative;display:flex;flex-direction:column;gap:14px}
.voice::before{content:"“";position:absolute;top:4px;right:20px;font-family:Georgia,serif;font-size:64px;line-height:1;color:rgba(35,211,238,.22)}
.voice p{font-size:14.5px;color:var(--sub);position:relative;z-index:1}
.voice-who{display:flex;align-items:center;gap:12px;margin-top:auto}
.avatar{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;font-size:15px;color:var(--cyan);border:1px solid rgba(35,211,238,.45);background:rgba(35,211,238,.1)}
.voice-who b{font-size:14px;display:block;line-height:1.4}
.voice-who span{font-size:12.5px;color:var(--muted)}
.audi{display:flex;gap:14px;align-items:flex-start;padding:20px;border:1px solid var(--line);border-radius:var(--r);background:rgba(255,255,255,.03);transition:border-color .2s,background .2s}
.audi:hover{border-color:rgba(35,211,238,.4);background:rgba(35,211,238,.05)}
.audi-ico{flex:0 0 34px;width:34px;height:34px;border-radius:8px;border:1px solid rgba(35,211,238,.4);display:grid;place-items:center;color:var(--cyan);font-family:var(--mono);font-size:13px}
.audi h3{font-size:15px;margin-bottom:4px}
.audi p{font-size:13.5px;color:var(--sub)}
.news-item{display:flex;gap:14px;align-items:center;padding:14px;border:1px solid var(--line2);border-radius:var(--rb);background:rgba(255,255,255,.03);transition:border-color .2s,background .2s}
.news-item:hover{border-color:rgba(35,211,238,.4);background:rgba(35,211,238,.05)}
.news-item img{width:80px;height:56px;object-fit:cover;flex:0 0 80px;border-radius:8px}
.news-item h3{font-size:15px;line-height:1.4}
.news-item time{display:block;margin-top:4px;font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:1px}
.bar-row{display:grid;grid-template-columns:150px 1fr 60px;align-items:center;gap:16px;padding:12px 0;border-bottom:1px solid var(--line2)}
.bar-row:last-child{border-bottom:0}
.bar-row b{font-size:14px;font-weight:600;color:var(--sub)}
.bar{height:6px;border-radius:999px;background:rgba(120,190,255,.14);overflow:hidden}
.bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#23D3EE,#2C8BFF)}
.bar-row em{font-family:var(--mono);font-style:normal;font-size:13px;color:var(--cyan);letter-spacing:1px;text-align:right}
details{border:1px solid var(--line);border-radius:var(--r);background:var(--glass);margin-bottom:14px;padding:0 20px}
details[open]{border-color:rgba(35,211,238,.4)}
summary{cursor:pointer;list-style:none;min-height:44px;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 0;font-size:15.5px;font-weight:600}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-family:var(--mono);font-size:20px;color:var(--cyan);line-height:1}
details[open] summary::after{content:"−"}
details p{padding:0 0 18px;font-size:14.5px;color:var(--sub)}
.cta-band{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;padding:36px;border:1px solid rgba(35,211,238,.28);border-radius:var(--r);background:linear-gradient(120deg,rgba(35,211,238,.10),rgba(12,20,36,.9));box-shadow:var(--sh)}
.cta-band h2{font-size:clamp(20px,2.2vw,28px)}
.cta-band p{margin-top:10px;color:var(--sub);font-size:14.5px;max-width:520px}
.cta-meta{margin-top:14px;font-family:var(--mono);font-size:12.5px;letter-spacing:1px;color:var(--muted)}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.site-footer{border-top:1px solid var(--line2);background:var(--panel);padding:56px 0 22px}
.ft-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:32px}
.ft-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.ft-desc{font-size:13.5px;color:var(--sub);max-width:280px}
.ft-col h3{font-size:14px;margin-bottom:14px;color:var(--text)}
.ft-col li{margin-bottom:10px}
.ft-col a{font-size:13.5px;color:var(--sub)}
.ft-form{display:flex;gap:8px;margin-top:12px}
.ft-form input{flex:1;min-width:0;height:42px;padding:0 14px;border-radius:var(--rb);background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--text);font-size:13.5px;outline:none}
.ft-form input:focus{border-color:rgba(35,211,238,.6)}
.ft-form button{min-height:42px;padding:0 16px;border-radius:var(--rb);border:0;background:linear-gradient(120deg,#23D3EE,#2C8BFF);color:#04121C;font-weight:700;font-size:14px;cursor:pointer}
.ft-form button:hover{filter:brightness(1.1)}
.copy{margin-top:36px;padding-top:18px;border-top:1px solid var(--line2);font-size:12.5px;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media (max-width:1024px){
section{padding:56px 0}
.nav,.hd-search{display:none}
.burger{display:flex}
.hero-grid{grid-template-columns:1fr;gap:36px}
.split{grid-template-columns:1fr;gap:28px}
.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}
.ft-grid{grid-template-columns:1fr 1fr}
.cta-band{grid-template-columns:1fr;padding:28px}
}
@media (max-width:768px){
.grid{gap:14px}
.rank-wrap{grid-template-columns:1fr;gap:0}
.feature{grid-template-columns:1fr}
.feature img{aspect-ratio:16/9;height:auto}
.bar-row{grid-template-columns:110px 1fr 52px;gap:10px}
.rank-title{white-space:normal}
}
@media (max-width:520px){
section{padding:40px 0}
.container{padding:0 16px}
.g2,.g3,.g4{grid-template-columns:1fr}
.ft-grid{grid-template-columns:1fr}
.hd-cta{display:none}
.brand-name{font-size:15px}
.pain-item{padding:20px;gap:12px}
.stat{border-left:0;border-top:1px solid rgba(35,211,238,.28);padding:20px 0 0}
.hero-actions .btn{flex:1}
.cta-actions .btn{flex:1}
.news-item img{width:68px;height:48px;flex:0 0 68px}
}