/* roulang page: index */
:root{
  --paper:#F6F1E7;--card:#FFFDF8;--ink:#221C15;--ink-2:#6B6255;--line:#E4D9C6;
  --clay:#A9502F;--clay-dark:#8C3F24;--sage:#33503F;--amber:#D69544;--night:#221C15;
  --radius:16px;--radius-sm:12px;
  --shadow:0 1px 2px rgba(34,28,21,.04),0 8px 24px -12px rgba(34,28,21,.18);
  --serif:"Noto Serif SC","Songti SC","SimSun",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Inter","PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:16px;line-height:1.75}
img{display:block;max-width:100%}
a{color:inherit}
h1,h2,h3{font-family:var(--serif);font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.tnum{font-variant-numeric:tabular-nums}

.container{max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section--alt{background:var(--card)}
.sec-head{margin-bottom:44px;max-width:780px}
.sec-title{font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.3;margin:0 0 12px}
.sec-sub{font-size:14.5px;color:var(--ink-2);line-height:1.8;margin:0}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;height:48px;padding:0 26px;border-radius:999px;font-size:15px;font-weight:600;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:background .22s,color .22s,transform .22s,border-color .22s}
.btn-primary{background:var(--clay);color:#FBF6EC}
.btn-primary:hover{background:var(--clay-dark);transform:translateY(-1px)}
.btn-primary:active{transform:none}
.btn-ghost{background:transparent;color:var(--clay);border-color:var(--clay)}
.btn-ghost:hover{background:rgba(169,80,47,.08)}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--clay);font-size:14.5px;font-weight:600;text-decoration:none;margin-top:22px;border-bottom:1px solid transparent;transition:gap .2s,border-color .2s}
.text-link:hover{gap:10px;border-color:var(--clay)}

/* 头部导航 */
.site-header{position:sticky;top:0;z-index:50;background:rgba(246,241,231,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-toggle{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.nav{display:flex;align-items:center;gap:28px;height:70px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);flex:0 0 auto}
.logo-mark{width:40px;height:40px;border-radius:12px;background:var(--clay);color:#FBF6EC;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:18px}
.logo-text{display:flex;flex-direction:column;font-size:17px;font-weight:600;line-height:1.25}
.logo-text small{font-size:10px;font-weight:400;color:var(--ink-2);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a:not(.btn){font-size:14.5px;color:var(--ink-2);text-decoration:none;position:relative;padding:8px 0;transition:color .2s}
.nav-links a:not(.btn)::after{content:"";position:absolute;left:0;right:100%;bottom:2px;height:2px;background:var(--clay);transition:right .22s}
.nav-links a:not(.btn):hover{color:var(--ink)}
.nav-links a:not(.btn):hover::after{right:0}
.nav-burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:var(--card);cursor:pointer;padding:0}
.nav-burger span{display:block;width:18px;height:2px;background:var(--ink);margin:4px auto;border-radius:2px}
.nav-drawer{display:none;border-top:1px solid var(--line);padding-bottom:18px}
.nav-toggle:checked ~ .nav-drawer{display:block}
.nav-drawer a{display:flex;align-items:center;height:48px;padding:0 32px;font-size:15px;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--line)}
.nav-drawer a.btn{margin:16px 32px 0;height:46px;padding:0;justify-content:center;border-bottom:none}

/* 首屏 */
.hero{position:relative;overflow:hidden;padding:118px 0 168px;isolation:isolate;background:#1A1510}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(110deg,rgba(26,21,16,.94) 0%,rgba(26,21,16,.82) 46%,rgba(140,63,36,.7) 100%);clip-path:polygon(0 0,100% 0,100% 100%,0 86%)}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:120px;background:var(--paper);clip-path:polygon(0 100%,100% 44%,100% 100%)}
.hero-inner{position:relative}
.hero-eyebrow{font-size:13px;letter-spacing:.08em;color:var(--amber);margin:0 0 18px}
.hero-title{font-size:clamp(2rem,5vw,3.4rem);line-height:1.22;margin:0 0 20px;color:#F8F3E8;max-width:15em}
.hero-title em{font-style:normal;color:var(--amber)}
.hero-sub{font-size:16.5px;font-weight:600;color:rgba(248,243,232,.94);margin:0 0 16px}
.hero-desc{font-size:15px;line-height:1.9;color:rgba(246,241,231,.76);max-width:660px;margin:0 0 32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero .btn-ghost{color:#F6F1E7;border-color:rgba(246,241,231,.45)}
.hero .btn-ghost:hover{background:rgba(246,241,231,.14)}
.hero-facts{display:flex;flex-wrap:wrap;font-size:13px;color:rgba(246,241,231,.68);margin-top:28px}
.hero-facts li{display:flex;align-items:center}
.hero-facts li + li::before{content:"·";margin:0 12px;opacity:.6}

/* 观看痛点 */
.pain-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:56px;align-items:start}
.pain-list{display:grid;grid-template-columns:1fr 1fr;gap:34px 28px}
.pain-idx{width:32px;height:32px;border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--clay);margin-bottom:14px;background:var(--card)}
.pain-item h3{font-family:"Inter","PingFang SC","Microsoft YaHei",sans-serif;font-size:15.5px;font-weight:600;margin:0 0 8px}
.pain-item p{font-size:13.5px;color:var(--ink-2);line-height:1.75}

/* 解决方案 */
.sol-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.sol-figure{margin:0}
.sol-media{aspect-ratio:4/3;border-radius:var(--radius);overflow:hidden;background:#EDE4D4}
.sol-media img{width:100%;height:100%;object-fit:cover}
.sol-caption{font-size:12px;color:var(--ink-2);margin-top:10px}
.sol-body p{font-size:14.5px;color:var(--ink-2);line-height:1.85;margin-top:14px}
.sol-points{margin-top:26px;display:grid;gap:0}
.sol-points li{display:flex;gap:14px;padding:14px 0;border-top:1px solid var(--line);font-size:14px;line-height:1.7;color:var(--ink)}
.sol-points b{font-family:var(--serif);color:var(--clay);font-size:15px;flex:0 0 auto}

/* 视频卡片 */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.vcard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:transform .25s,border-color .25s}
.vcard:hover{transform:translateY(-2px);border-color:rgba(169,80,47,.35)}
.thumb{position:relative;aspect-ratio:16/9;background:#EDE4D4;overflow:hidden;display:block}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.vcard:hover .thumb img{transform:scale(1.03)}
.dur{position:absolute;right:8px;bottom:8px;height:22px;line-height:22px;padding:0 8px;border-radius:999px;background:rgba(34,28,21,.74);color:#F6F1E7;font-size:11px;font-variant-numeric:tabular-nums}
.q-badge{position:absolute;left:8px;bottom:8px;height:22px;line-height:22px;padding:0 8px;border-radius:999px;background:rgba(246,241,231,.94);color:var(--ink);font-size:11px;font-weight:600}
.vcard-body{padding:12px 14px 16px}
.vcard-title{font-family:"Inter","PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;font-weight:600;line-height:1.45;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.vcard-meta{margin-top:8px;font-size:12.5px;color:var(--ink-2);display:flex;gap:10px;font-variant-numeric:tabular-nums}
.vcard--feature{grid-column:span 2;grid-row:span 2;display:flex;flex-direction:column}
.vcard--feature .thumb{flex:1;aspect-ratio:auto;min-height:0}

/* 最新更新 */
.latest-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 44px}
.row-card{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.row-thumb{width:120px;height:80px;flex:0 0 auto;border-radius:10px;overflow:hidden;background:#EDE4D4}
.row-thumb img{width:100%;height:100%;object-fit:cover}
.row-body{min-width:0}
.row-title{font-family:"Inter","PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;font-weight:600;margin:0 0 6px}
.row-note{font-size:13px;color:var(--ink-2);line-height:1.6;margin:0 0 4px}
.row-time{font-size:12.5px;color:var(--ink-2);opacity:.85;font-variant-numeric:tabular-nums}

/* 分类频道 */
.cats{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.cat-card{display:block;text-decoration:none;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px;transition:border-color .22s,background .22s}
.cat-card:hover{border-color:var(--clay);background:#FBF5EA}
.cat-name{font-size:21px;margin:0 0 10px;line-height:1.3;transition:color .22s}
.cat-card:hover .cat-name{color:var(--clay-dark)}
.cat-desc{font-size:13px;color:var(--ink-2);line-height:1.75;margin:0 0 14px}
.cat-count{font-size:12px;color:var(--ink-2);font-variant-numeric:tabular-nums}

/* 观看步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr)}
.step{padding:0 34px;border-left:1px solid var(--line)}
.step:first-child{border-left:none;padding-left:0}
.step-num{font-family:var(--serif);font-size:42px;line-height:1;color:var(--amber);font-variant-numeric:tabular-nums}
.step-title{font-family:"Inter","PingFang SC","Microsoft YaHei",sans-serif;font-size:17px;font-weight:600;margin:14px 0 8px}
.step-text{font-size:14px;color:var(--ink-2);line-height:1.8}

/* 播放榜 */
.rank-wrap{background:var(--night);border-radius:24px;padding:48px 44px;color:#F6F1E7}
.rank-head{display:flex;justify-content:space-between;align-items:baseline;gap:20px;flex-wrap:wrap;margin-bottom:22px}
.rank-head h2{color:#F8F3E8;margin:0;font-size:clamp(1.5rem,3vw,2.1rem)}
.rank-head p{font-size:13px;color:rgba(246,241,231,.62);margin:0}
.rank-row{display:flex;align-items:center;gap:18px;height:52px;padding:0 12px;border-bottom:1px solid rgba(246,241,231,.14);transition:background .2s}
.rank-row:last-child{border-bottom:none}
.rank-row:hover{background:rgba(255,255,255,.04)}
.rank-num{font-family:var(--serif);font-size:26px;width:44px;flex:0 0 auto;color:rgba(246,241,231,.5);font-variant-numeric:tabular-nums}
.rank-row:nth-child(-n+3) .rank-num{color:var(--amber)}
.rank-title{flex:1;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rank-play{font-size:13.5px;color:rgba(246,241,231,.72);font-variant-numeric:tabular-nums}
.rank-tag{font-size:11.5px;height:22px;line-height:22px;padding:0 10px;border-radius:999px;background:rgba(246,241,231,.1);color:rgba(246,241,231,.82)}

/* 成果数据 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat{padding:30px 24px;border-left:1px solid var(--line)}
.stat:first-child{border-left:none;padding-left:0}
.stat-num{font-family:var(--serif);font-size:34px;line-height:1.15;color:var(--clay);font-variant-numeric:tabular-nums}
.stat-name{font-size:14px;font-weight:600;margin:10px 0 4px}
.stat-note{font-size:12.5px;color:var(--ink-2)}

/* 证言 */
.voices{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.voice{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px 24px}
.voice:nth-child(2){margin-top:30px}
.voice-mark{font-family:var(--serif);font-size:44px;line-height:.8;color:var(--amber);opacity:.75}
.voice-text{font-size:14.5px;line-height:1.85;margin:12px 0 18px;color:var(--ink)}
.voice-foot{display:flex;align-items:center;gap:10px;border-top:1px solid var(--line);padding-top:14px}
.avatar{width:34px;height:34px;border-radius:50%;background:#EDE4D4;color:var(--clay);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;flex:0 0 auto}
.voice-name{font-size:13.5px;font-weight:600;line-height:1.4}
.voice-tag{font-size:12px;color:var(--ink-2);line-height:1.4}

/* 适用人群 */
.aud{display:flex;flex-wrap:wrap;gap:16px}
.aud li{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 22px;transition:border-color .2s,background .2s;flex:0 1 auto}
.aud li:nth-child(odd){border-radius:999px}
.aud li:hover{border-color:rgba(169,80,47,.42);background:#FBF5EA}
.aud-name{display:block;font-size:14.5px;font-weight:600;color:var(--clay-dark)}
.aud-desc{display:block;font-size:13px;color:var(--ink-2);line-height:1.6;margin-top:4px}

/* 原创专题 */
.topics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.topic{text-decoration:none;color:inherit;display:block}
.topic-thumb{aspect-ratio:16/9;border-radius:var(--radius-sm);overflow:hidden;background:#EDE4D4}
.topic-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.topic:hover .topic-thumb img{transform:scale(1.03)}
.topic-title{font-family:var(--serif);font-size:17px;margin:12px 0 6px;transition:color .2s}
.topic:hover .topic-title{color:var(--clay)}
.topic-desc{font-size:13px;color:var(--ink-2);line-height:1.7}
.topic-count{font-size:12px;color:var(--ink-2);margin-top:8px;display:block}

/* 资讯 */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 44px}
.news-item{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.news-thumb{width:96px;height:72px;flex:0 0 auto;border-radius:8px;overflow:hidden;background:#EDE4D4}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-body{min-width:0}
.news-title{font-size:14.5px;line-height:1.6;margin:0 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-date{font-size:13px;color:var(--ink-2);font-variant-numeric:tabular-nums}

/* 数据指标条 */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.metric{padding:24px 22px;border-left:1px solid var(--line)}
.metric:first-child{border-left:none;padding-left:0}
.metric-label{font-size:12px;color:var(--ink-2);letter-spacing:.04em}
.metric-value{font-family:var(--serif);font-size:21px;margin:8px 0 4px;line-height:1.35}
.metric-note{font-size:12.5px;color:var(--ink-2)}

/* 问答 */
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 0;font-family:"Inter","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;font-weight:600;cursor:pointer;list-style:none}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{content:"+";flex:0 0 auto;color:var(--clay);font-size:22px;line-height:1;transition:transform .2s}
details[open] .faq-q{color:var(--clay)}
details[open] .faq-q::after{transform:rotate(45deg)}
.faq-a{max-width:840px;padding:0 0 20px;font-size:14.5px;line-height:1.85;color:var(--ink-2)}

/* 结尾行动区 */
.cta{background:var(--clay);color:#FBF6EC;padding:76px 0}
.cta-inner{max-width:760px}
.cta h2{font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.35;margin:0 0 14px;color:#FBF6EC}
.cta p{font-size:15px;line-height:1.85;color:rgba(251,246,236,.86);margin:0 0 30px}
.cta .btn-primary{background:#FBF6EC;color:var(--clay-dark)}
.cta .btn-primary:hover{background:#fff}
.cta .btn-ghost{color:#FBF6EC;border-color:rgba(251,246,236,.6)}
.cta .btn-ghost:hover{background:rgba(251,246,236,.14)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* 页脚 */
.site-footer{background:#EDE4D4;border-top:1px solid var(--line);padding:64px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand .logo-text small{color:var(--ink-2)}
.foot-brand p{font-size:13.5px;color:var(--ink-2);line-height:1.9;margin-top:14px;max-width:340px}
.foot-title{font-family:"Inter","PingFang SC","Microsoft YaHei",sans-serif;font-size:14px;font-weight:600;margin:0 0 14px}
.foot-links{display:grid;gap:10px}
.foot-links a{font-size:14px;color:var(--ink-2);text-decoration:none;transition:color .2s}
.foot-links a:hover{color:var(--clay)}
.foot-contact{font-size:13.5px;color:var(--ink-2);line-height:1.9}
.foot-copy{border-top:1px solid var(--line);margin-top:44px;padding-top:20px;font-size:13px;color:var(--ink-2);text-align:center}

@media (max-width:1024px){
  .section{padding:72px 0}
  .nav-links{display:none}
  .nav-burger{display:block;margin-left:auto}
  .pain-grid{grid-template-columns:1fr;gap:36px}
  .sol-grid{grid-template-columns:1fr;gap:36px}
  .cards{grid-template-columns:repeat(3,1fr)}
  .vcard--feature{grid-column:span 2;grid-row:auto}
  .vcard--feature .thumb{flex:none;aspect-ratio:16/9}
  .cats{grid-template-columns:repeat(3,1fr)}
  .topics{grid-template-columns:repeat(2,1fr)}
  .voices{grid-template-columns:1fr 1fr}
  .voice:nth-child(2){margin-top:0}
  .stats,.metrics{grid-template-columns:repeat(2,1fr)}
  .stat,.metric{border-left:none;padding-left:0}
  .stat:nth-child(n+3),.metric:nth-child(n+3){border-top:1px solid var(--line)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .steps{grid-template-columns:1fr;gap:28px}
  .step{padding:0;border-left:none;border-top:1px solid var(--line);padding-top:22px}
  .step:first-child{border-top:none;padding-top:0}
}
@media (max-width:768px){
  .container{padding:0 24px}
  .hero{padding:88px 0 140px}
  .hero::after{height:90px}
  .cards{grid-template-columns:repeat(2,1fr);gap:18px}
  .vcard--feature{grid-column:span 2}
  .cats{grid-template-columns:repeat(2,1fr)}
  .latest-grid,.news-grid{grid-template-columns:1fr}
  .rank-wrap{padding:32px 22px;border-radius:18px}
  .rank-row{gap:12px;padding:0 6px}
  .rank-num{font-size:22px;width:32px}
  .rank-tag{display:none}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .hero{padding:72px 0 120px}
  .hero::after{height:70px}
  .hero-desc{font-size:14px}
  .hero-actions .btn{width:100%}
  .cards{grid-template-columns:1fr}
  .vcard--feature{grid-column:span 1}
  .cats{grid-template-columns:1fr 1fr;gap:14px}
  .cat-card{padding:16px 14px}
  .cat-name{font-size:18px}
  .topics{grid-template-columns:1fr}
  .voices{grid-template-columns:1fr}
  .stats,.metrics{grid-template-columns:1fr}
  .stat,.metric{border-top:1px solid var(--line);padding:22px 0}
  .stat:first-child,.metric:first-child{border-top:none}
  .aud{display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .aud li{border-radius:14px;padding:14px 16px}
  .row-thumb{width:96px;height:64px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .cta-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .vcard:hover,.btn:hover{transform:none !important}
}