/* roulang page: index */
:root{
  --bg:#101214;
  --bg-alt:#1A1D1F;
  --paper:#F5EFE4;
  --orange:#E9A15C;
  --red:#C94B3C;
  --green:#5E6B63;
  --text:#EDE7DB;
  --muted:#9BA1A1;
  --line:rgba(245,239,228,.12);
  --line-strong:rgba(245,239,228,.22);
  --r:5px;
  --shadow:0 12px 32px rgba(0,0,0,.35);
  --serif:"Noto Serif SC","Songti SC","STSong",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --cond:"Barlow Condensed","Arial Narrow",Impact,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:700;line-height:1.32}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--orange);outline-offset:3px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0;border-top:1px solid var(--line);scroll-margin-top:80px}
.section.alt{background:var(--bg-alt)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--cond);font-size:13px;letter-spacing:2px;color:var(--orange);margin:0 0 16px;text-transform:uppercase}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--orange)}
.sec-head{max-width:780px;margin-bottom:48px}
.sec-head h2{font-size:34px;margin-bottom:16px}
.sec-head p{color:var(--muted);font-size:15px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:4px;font-size:15px;font-weight:500;border:1px solid transparent;transition:transform .18s ease,background .18s ease,color .18s ease,border-color .18s ease}
.btn-primary{background:var(--orange);color:#101214;font-weight:600}
.btn-primary:hover{background:var(--paper);color:#101214;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--paper);border-color:rgba(245,239,228,.4)}
.btn-ghost:hover{background:var(--paper);color:#101214;transform:translateY(-2px)}

/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(16,18,20,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:background .25s ease}
.site-header.scrolled{background:#101214}
.nav-wrap{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:12px;min-height:44px}
.brand-logo{width:40px;height:40px;flex:0 0 40px;background:var(--orange);color:#101214;display:grid;place-items:center;border-radius:4px;font-family:var(--serif);font-weight:900;font-size:15px;letter-spacing:-1px}
.brand-text{display:flex;flex-direction:column;line-height:1.16}
.brand-main{font-family:var(--serif);font-weight:700;font-size:15px}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:.6px}
.nav-links{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav-links a{font-size:14px;font-weight:500;color:var(--muted);padding:8px 0;border-bottom:2px solid transparent;transition:color .2s ease,border-color .2s ease}
.nav-links a:hover,.nav-links a.active{color:var(--paper);border-bottom-color:var(--orange)}
.nav-cta{margin-left:4px;height:44px;padding:0 20px;font-size:14px}
.nav-toggle{display:none;width:44px;height:44px;background:transparent;border:1px solid var(--line-strong);border-radius:4px;color:var(--paper);font-size:18px;line-height:1;align-items:center;justify-content:center;margin-left:auto}
.drawer-cta{display:none}

/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/a320b0296b643a1f.jpg');background-size:cover;background-position:center;opacity:.34;z-index:0}
.hero::before{content:"";position:absolute;inset:0;z-index:1;background:
  linear-gradient(100deg,rgba(16,18,20,.97) 0%,rgba(16,18,20,.82) 46%,rgba(16,18,20,.55) 100%),
  repeating-linear-gradient(0deg,rgba(245,239,228,.05) 0 1px,transparent 1px 5px);
  opacity:1}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 340px;gap:60px;align-items:center;padding-top:88px;padding-bottom:64px}
.hero h1{font-size:54px;font-weight:900;letter-spacing:-1px;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--orange)}
.hero-sub{font-size:18px;color:var(--paper);font-family:var(--serif);margin-bottom:14px}
.hero-desc{font-size:15px;color:var(--muted);max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-visual img{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:var(--r);border:1px solid var(--line-strong);box-shadow:var(--shadow)}
.hero-visual::after{content:"";position:absolute;inset:12px -12px -12px 12px;border:1px solid rgba(233,161,92,.45);border-radius:var(--r);z-index:-1}
.hero-countdown{position:relative;z-index:2;border-top:1px solid var(--line);background:rgba(16,18,20,.72)}
.cd-inner{display:flex;align-items:center;gap:26px;flex-wrap:wrap;padding:18px 24px}
.cd-label{font-size:13px;letter-spacing:1px;color:var(--muted)}
.cd-clock{display:flex;align-items:baseline;gap:6px}
.cd-num{font-family:var(--cond);font-size:28px;font-weight:700;color:var(--orange);line-height:1;letter-spacing:1px}
.cd-unit{font-size:12px;color:var(--muted);margin-right:8px}
.cd-note{font-size:13px;color:var(--muted);margin-left:auto}
.cd-inner .btn{height:40px;padding:0 18px;font-size:13px}

/* pain */
.pain-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.pain-lead h2{font-size:34px;margin-bottom:16px}
.pain-lead p{color:var(--muted);font-size:15px}
.pain-list li{display:flex;gap:20px;padding:22px 0;border-top:1px solid var(--line)}
.pain-list li:last-child{border-bottom:1px solid var(--line)}
.pain-list .num{font-family:var(--cond);font-size:24px;font-weight:700;color:var(--green);min-width:38px;line-height:1.4}
.pain-list h3{font-size:17px;font-family:var(--sans);font-weight:600;margin-bottom:4px}
.pain-list p{font-size:14px;color:var(--muted)}

/* solution */
.sol-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.sol-copy h2{font-size:34px;margin-bottom:18px}
.sol-copy p{color:var(--muted);font-size:15px}
.sol-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.sol-card{border:1px solid var(--line-strong);border-radius:var(--r);padding:24px 22px;box-shadow:var(--shadow);background:rgba(245,239,228,.02);transition:border-color .2s ease}
.sol-card:hover{border-color:var(--orange)}
.sol-card h3{font-size:17px;font-family:var(--sans);font-weight:600;margin-bottom:8px;color:var(--paper)}
.sol-card p{font-size:13px;color:var(--muted);line-height:1.7}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:8px}
.step{padding:0 24px;border-left:1px dashed rgba(245,239,228,.2)}
.step:first-child{border-left:0;padding-left:0}
.step-num{font-family:var(--cond);font-size:60px;font-weight:700;line-height:1;color:transparent;-webkit-text-stroke:1px rgba(233,161,92,.75);margin-bottom:14px}
.step h3{font-size:18px;font-family:var(--sans);font-weight:600;margin-bottom:8px}
.step p{font-size:14px;color:var(--muted)}
.badge{display:inline-block;font-size:11px;line-height:1;padding:5px 10px;border-radius:999px;background:rgba(16,18,20,.72);border:1px solid var(--paper);color:var(--paper);white-space:nowrap}
.badge.fast{border-color:var(--orange);color:var(--orange)}
.badge.new{border-color:var(--green);color:#A3B8AA}
.step .badge{margin-top:14px}

/* metrics */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.metric{border:1px solid var(--line);border-radius:var(--r);padding:30px 24px;background:rgba(245,239,228,.015)}
.metric b{display:block;font-family:var(--cond);font-size:44px;font-weight:700;line-height:1;color:var(--orange);margin-bottom:10px}
.metric span{font-size:13px;color:var(--muted)}

/* poster cards */
.poster-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.poster-card{position:relative;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--bg-alt);transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease}
.poster-card:hover{border-color:var(--orange);transform:translateY(-3px);box-shadow:var(--shadow)}
.poster-media{position:relative;aspect-ratio:2/3;overflow:hidden}
.poster-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.poster-card:hover .poster-media img{transform:scale(1.03)}
.poster-media::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(16,18,20,.92) 0%,rgba(16,18,20,.16) 46%,transparent 72%)}
.poster-media .badge{position:absolute;top:10px;left:10px;z-index:2}
.score{position:absolute;right:10px;bottom:10px;z-index:2;font-family:var(--cond);font-size:14px;font-weight:600;color:var(--orange);letter-spacing:.5px}
.poster-body{padding:12px 14px 16px}
.poster-body h3{font-family:var(--sans);font-size:15px;font-weight:500;line-height:1.5;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:45px}
.poster-card:hover .poster-body h3{text-decoration:underline;text-decoration-thickness:2px;text-decoration-color:var(--orange);text-underline-offset:3px}
.poster-cat{font-size:12px;color:var(--muted)}

/* recommend */
.rec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rec-card{display:grid;grid-template-columns:42% 1fr;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--bg-alt);transition:border-color .25s ease,transform .25s ease}
.rec-card:hover{border-color:var(--orange);transform:translateY(-2px)}
.rec-media{overflow:hidden;aspect-ratio:4/3}
.rec-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.rec-card:hover .rec-media img{transform:scale(1.03)}
.rec-body{padding:18px 18px 16px}
.rec-body h3{font-family:var(--sans);font-size:16px;font-weight:600;margin-bottom:8px;line-height:1.5}
.rec-body p{font-size:13px;color:var(--muted);line-height:1.65;margin-bottom:12px}
.rec-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted)}
.rec-foot .score{position:static}
.tagline{display:inline-block;font-size:11px;padding:3px 9px;border:1px solid var(--line-strong);border-radius:999px;color:var(--muted)}

/* category */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cat-item{display:flex;gap:18px;padding:28px 22px;border:1px solid var(--line);border-radius:var(--r);background:rgba(245,239,228,.02);transition:border-color .22s ease,background .22s ease}
.cat-item:hover{border-color:var(--orange);background:rgba(233,161,92,.06)}
.cat-idx{font-family:var(--cond);font-size:30px;font-weight:700;line-height:1;color:var(--orange);padding-right:18px;border-right:1px solid var(--line-strong)}
.cat-item h3{font-family:var(--sans);font-size:17px;font-weight:600;margin-bottom:6px}
.cat-item p{font-size:13px;color:var(--muted);line-height:1.65}

/* rank */
.rank-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 48px}
.rank-item{display:flex;align-items:center;gap:16px;padding:16px 0;border-bottom:1px solid var(--line)}
.rank-no{font-family:var(--cond);font-size:26px;font-weight:700;line-height:1;min-width:42px;color:transparent;-webkit-text-stroke:1px rgba(245,239,228,.45)}
.rank-item:nth-child(-n+3) .rank-no{-webkit-text-stroke-color:var(--orange)}
.rank-name{flex:1;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-bar{width:64px;height:3px;border-radius:2px;background:rgba(245,239,228,.12);overflow:hidden;flex:0 0 64px}
.rank-bar i{display:block;height:100%;background:var(--orange)}
.rank-score{font-family:var(--cond);font-size:14px;color:var(--orange);min-width:34px;text-align:right}
.rank-tag{font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:2px 8px;white-space:nowrap}

/* quotes */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.quote-card{background:var(--paper);color:#16181A;border-radius:var(--r);padding:28px 24px;box-shadow:var(--shadow)}
.quote-card:nth-child(2){margin-top:28px}
.quote-card:nth-child(3){margin-top:12px}
.quote-head{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.avatar{width:40px;height:40px;flex:0 0 40px;border-radius:50%;background:#16181A;color:var(--paper);display:grid;place-items:center;font-family:var(--serif);font-size:15px}
.quote-head b{display:block;font-size:15px;font-weight:600}
.quote-head span{font-size:12px;color:#6B7071}
.quote-card p{font-size:14px;line-height:1.75;color:#33383A}

/* audience */
.aud-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.aud-item{display:flex;gap:18px;padding:26px 24px;border:1px solid var(--line);border-radius:var(--r);background:rgba(245,239,228,.02)}
.aud-icon{width:44px;height:44px;flex:0 0 44px;display:grid;place-items:center;border:1px solid var(--orange);border-radius:4px;color:var(--orange);font-family:var(--cond);font-size:16px;font-weight:700}
.aud-item h3{font-family:var(--sans);font-size:17px;font-weight:600;margin-bottom:6px}
.aud-item p{font-size:13px;color:var(--muted);line-height:1.65}

/* news */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px 40px}
.news-item{display:grid;grid-template-columns:170px 1fr;gap:20px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.news-thumb{aspect-ratio:16/9;overflow:hidden;border-radius:var(--r);border:1px solid var(--line)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.news-item:hover .news-thumb img{transform:scale(1.04)}
.news-item h3{font-family:var(--sans);font-size:16px;font-weight:600;line-height:1.55;margin-bottom:8px}
.news-item:hover h3{color:var(--orange)}
.news-meta{display:flex;gap:12px;font-size:12px;color:var(--muted)}

/* faq */
.faq-grid{display:grid;grid-template-columns:300px 1fr;gap:56px;align-items:start}
.faq-side{position:sticky;top:96px}
.faq-side h2{font-size:32px;margin-bottom:14px}
.faq-side p{font-size:14px;color:var(--muted)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:62px;padding:8px 0;font-size:16px;font-weight:500;list-style:none;cursor:pointer;transition:color .2s ease}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-family:var(--cond);font-size:24px;line-height:1;color:var(--orange)}
.faq-item[open] summary::after{content:"−"}
.faq-item summary:hover{color:var(--orange)}
.faq-body{padding:0 0 22px;font-size:15px;color:var(--muted);max-width:660px}

/* kpi */
.kpi-bar{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.kpi{padding:28px 20px;border-right:1px solid var(--line)}
.kpi:last-child{border-right:0}
.kpi b{display:block;font-family:var(--cond);font-size:34px;font-weight:700;line-height:1.1;color:var(--paper);margin-bottom:6px}
.kpi span{font-size:13px;color:var(--muted)}

/* cta */
.cta{background:var(--paper);color:#16181A;border-top:1px solid var(--line);position:relative;overflow:hidden;scroll-margin-top:80px}
.cta::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:repeating-linear-gradient(90deg,#16181A 0 10px,transparent 10px 20px);opacity:.35}
.cta-inner{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:center;padding:80px 0}
.cta h2{font-size:36px;color:#16181A;margin-bottom:14px}
.cta p{color:#4A4F50;font-size:15px;max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta .btn-ghost{border-color:rgba(22,24,26,.4);color:#16181A}
.cta .btn-ghost:hover{background:#16181A;color:var(--paper)}
.cta-note{font-size:12px;color:#6B7071;margin-top:22px}

/* footer */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--line);padding-top:72px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px;padding-bottom:56px}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.foot-col h4{font-family:var(--sans);font-size:14px;font-weight:600;letter-spacing:1px;color:var(--paper);margin-bottom:18px}
.foot-col p{font-size:13px;color:var(--muted);line-height:1.75}
.foot-col a{display:block;font-size:14px;color:var(--muted);padding:6px 0;transition:color .2s ease}
.foot-col a:hover{color:var(--orange)}
.foot-bottom{border-top:1px solid var(--line);padding:22px 0;font-size:13px;color:var(--muted);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

@media (max-width:1024px){
  .section{padding:72px 0}
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .nav-links.open{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:#101214;border-bottom:1px solid var(--line);padding:8px 24px 20px;margin:0}
  .nav-links.open a{padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
  .nav-links.open a:last-of-type{border-bottom:0}
  .drawer-cta{display:flex;align-items:center;justify-content:center;height:46px;margin-top:14px;background:var(--orange);color:#101214;border-radius:4px;font-weight:600;font-size:15px}
  .brand-sub{display:none}
  .hero-inner{grid-template-columns:1fr;gap:40px;padding-top:64px;padding-bottom:48px}
  .hero h1{font-size:44px}
  .hero-visual{max-width:300px}
  .pain-grid,.sol-grid,.faq-grid{grid-template-columns:1fr;gap:36px}
  .faq-side{position:static}
  .poster-grid{grid-template-columns:repeat(3,1fr)}
  .rec-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr);gap:36px 0}
  .step:nth-child(3){border-left:0;padding-left:0}
  .metric-grid{grid-template-columns:repeat(2,1fr)}
  .quote-grid{grid-template-columns:1fr}
  .quote-card:nth-child(2){margin-top:0}
  .quote-card:nth-child(3){margin-top:0}
  .kpi-bar{grid-template-columns:repeat(3,1fr)}
  .cta-inner{grid-template-columns:1fr;gap:30px;padding:64px 0}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cd-note{margin-left:0;width:100%}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .hero h1{font-size:34px;letter-spacing:0}
  .hero-sub{font-size:16px}
  .sec-head h2,.pain-lead h2,.sol-copy h2{font-size:27px}
  .poster-grid{grid-template-columns:repeat(2,1fr)}
  .rec-grid{grid-template-columns:1fr}
  .rank-grid{grid-template-columns:1fr;gap:0}
  .aud-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .news-item{grid-template-columns:130px 1fr;gap:14px}
  .steps{grid-template-columns:1fr;gap:28px}
  .step{border-left:0;padding:0 0 0 0;border-top:1px dashed rgba(245,239,228,.2);padding-top:24px}
  .step:first-child{border-top:0;padding-top:0}
  .step-num{font-size:48px;margin-bottom:10px}
  .kpi-bar{grid-template-columns:repeat(2,1fr)}
  .cta h2{font-size:27px}
  .faq-side h2{font-size:26px}
}
@media (max-width:520px){
  .hero h1{font-size:32px}
  .hero-actions .btn{width:100%}
  .cd-inner{gap:14px}
  .cd-num{font-size:22px}
  .cat-grid{grid-template-columns:1fr}
  .metric-grid{grid-template-columns:1fr}
  .sol-cards{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .cta-actions .btn{width:100%}
  .kpi-bar{grid-template-columns:1fr}
  .kpi{border-right:0;border-bottom:1px solid var(--line)}
  .kpi:last-child{border-bottom:0}
  .news-item{grid-template-columns:1fr}
  .news-thumb{aspect-ratio:16/9}
  .rank-bar,.rank-tag{display:none}
}