/* roulang page: index */
:root{
  --brand:#E4713B;
  --pink:#E4517E;
  --cream:#FFC96B;
  --grad:linear-gradient(120deg,#FF8A3D 0%,#E4517E 100%);
  --bg:#FFF8F1;
  --card:#FFFFFF;
  --soft:#FFF1E6;
  --line:#F3E2D6;
  --ink:#2E1F1A;
  --ink2:#6B564D;
  --r-lg:24px;
  --r:18px;
  --shadow:0 8px 24px rgba(196,120,80,.12);
  --shadow-h:0 12px 32px rgba(196,120,80,.20);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
h1,h2,h3{line-height:1.3;margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.sec{padding:72px 0}
.sec-soft{background:var(--soft)}
.sec-head{max-width:780px;margin:0 0 32px}
.sec-head h2{font-size:clamp(24px,3vw,32px);font-weight:800;letter-spacing:-.4px;margin-bottom:10px}
.sec-head p{color:var(--ink2);font-size:15px;margin:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 24px;border-radius:999px;font-weight:700;font-size:15px;transition:transform .25s,box-shadow .25s,background .25s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(228,113,59,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(228,113,59,.36)}
.btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand)}
.btn-ghost:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(228,113,59,.18)}
.btn-white{background:#fff;color:#C13F66;box-shadow:0 8px 20px rgba(90,30,20,.18)}
.btn-white:hover{transform:translateY(-2px)}
.btn-line{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.85)}
.btn-line:hover{transform:translateY(-2px);background:rgba(255,255,255,.14)}
.btn:active{transform:translateY(0)}
.btn-block{width:100%}
.pill{display:inline-flex;align-items:center;gap:6px;background:rgba(46,31,26,.62);color:#fff;border-radius:999px;padding:4px 12px;font-size:12px;font-weight:600;line-height:1.6}
.tag{display:inline-block;background:var(--soft);color:var(--brand);border-radius:999px;padding:2px 10px;font-size:12px;font-weight:600;line-height:1.7}
/* header */
.site-header{position:sticky;top:0;z-index:60;background:#FFFDFA;border-bottom:1px solid var(--line);transition:box-shadow .25s}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(196,120,80,.14)}
.header-inner{display:flex;align-items:center;gap:20px;height:70px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:38px;height:38px;border-radius:12px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:800;box-shadow:0 6px 16px rgba(228,113,59,.3)}
.brand-name{font-size:18px;font-weight:800;letter-spacing:.5px}
.main-nav{display:flex;gap:4px;margin-left:auto}
.main-nav a{padding:9px 13px;border-radius:999px;font-size:14px;font-weight:500;color:var(--ink2);transition:background .2s,color .2s}
.main-nav a:hover{background:var(--soft);color:var(--brand)}
.header-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);align-items:center;justify-content:center;font-size:13px;font-weight:700;color:var(--brand)}
/* hero */
.hero{padding:56px 0 72px;background:linear-gradient(180deg,#FFF8F1 0%,#FFF1E6 100%)}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:48px;align-items:center}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 16px;font-size:13px;font-weight:700;color:var(--brand);margin-bottom:18px}
.dot{width:8px;height:8px;border-radius:999px;background:var(--brand)}
.hero h1{font-size:clamp(30px,4.2vw,52px);font-weight:800;letter-spacing:-1px;line-height:1.16;margin-bottom:18px}
.hero-lead{font-size:16px;color:var(--ink2);margin:0 0 10px;max-width:580px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-nums{display:flex;flex-wrap:wrap;gap:28px;margin-top:32px;padding-top:22px;border-top:1px solid var(--line)}
.hero-nums div strong{display:block;font-size:24px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--brand)}
.hero-nums div span{font-size:13px;color:var(--ink2)}
.feature-card{position:relative;border-radius:var(--r-lg);overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.feature-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.feature-badges{position:absolute;left:16px;bottom:16px;display:flex;flex-wrap:wrap;gap:8px}
.feature-cap{position:absolute;left:16px;top:16px;background:var(--grad);color:#fff;border-radius:999px;padding:5px 14px;font-size:12px;font-weight:700}
/* cards */
.grid{display:grid;gap:24px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.g5{grid-template-columns:repeat(5,1fr)}
.g6{grid-template-columns:repeat(6,1fr)}
.card{display:flex;flex-direction:column;background:var(--card);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-h)}
.thumb{position:relative;overflow:hidden}
.thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
.card:hover .thumb img{transform:scale(1.05)}
.badge-r{position:absolute;right:10px;bottom:10px}
.badge-l{position:absolute;left:10px;bottom:10px}
.badge-new{position:absolute;right:10px;top:10px;background:var(--grad);color:#fff;border-radius:999px;padding:3px 10px;font-size:12px;font-weight:700}
.card-body{padding:12px 14px 16px}
.card-title{font-size:16px;font-weight:700;line-height:1.45;margin-bottom:5px}
.card-meta{font-size:13px;color:var(--ink2)}
.card-meta .kv{color:var(--brand);font-weight:700}
/* value band */
.value-card{display:flex;gap:14px;align-items:flex-start;background:var(--soft);border-radius:var(--r);padding:20px}
.v-icon{width:46px;height:46px;flex:0 0 auto;border-radius:14px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800}
.value-card h3{font-size:16px;font-weight:700;margin-bottom:6px}
.value-card p{margin:0;font-size:14px;color:var(--ink2);line-height:1.65}
/* functions */
.func-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px 20px;transition:border-color .25s,box-shadow .25s,transform .25s}
.func-card:hover{border-color:#F2C3A6;box-shadow:var(--shadow);transform:translateY(-2px)}
.func-icon{width:40px;height:40px;border-radius:12px;background:var(--soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;margin-bottom:12px}
.func-card h3{font-size:16px;font-weight:700;margin-bottom:6px}
.func-card p{margin:0;font-size:14px;color:var(--ink2);line-height:1.65}
/* channels */
.chan{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;display:flex;flex-direction:column;gap:8px;transition:box-shadow .25s,transform .25s}
.chan:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.chan h3{font-size:16px;font-weight:700;color:var(--brand)}
.chan p{margin:0;font-size:14px;color:var(--ink2);line-height:1.65}
.chan-all{margin-top:26px;text-align:center}
.chan-all a{font-weight:700;color:var(--brand);border-bottom:2px solid var(--line);padding-bottom:3px;transition:border-color .2s}
.chan-all a:hover{border-color:var(--brand)}
/* scenes */
.scene{border-radius:var(--r);overflow:hidden;background:#fff;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.scene:hover{transform:translateY(-2px);box-shadow:var(--shadow-h)}
.scene img{width:100%;aspect-ratio:16/9;object-fit:cover}
.scene-body{padding:14px 16px 18px;border-top:3px solid transparent}
.scene:nth-child(1) .scene-body{border-top-color:#FF8A3D}
.scene:nth-child(2) .scene-body{border-top-color:#F17A55}
.scene:nth-child(3) .scene-body{border-top-color:#E4517E}
.scene:nth-child(4) .scene-body{border-top-color:#FFC96B}
.scene-body h3{font-size:16px;font-weight:700;margin-bottom:6px}
.scene-body p{margin:0;font-size:14px;color:var(--ink2);line-height:1.65}
/* demo */
.demo-grid{display:grid;grid-template-columns:1.35fr .85fr;gap:32px;align-items:start}
.demo-main{border-radius:var(--r-lg);padding:10px;background:#fff;box-shadow:var(--shadow),0 0 0 6px rgba(255,201,107,.22)}
.demo-main img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:16px}
.demo-side{display:flex;flex-direction:column;gap:16px}
.demo-thumbs{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.demo-thumbs img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:14px;box-shadow:var(--shadow)}
.demo-points li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink2);padding:10px 0;border-bottom:1px dashed var(--line)}
.demo-points li::before{content:"▸";color:var(--brand);font-weight:800;flex:0 0 auto}
/* ranking */
.rank-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px}
.rank-item{display:flex;align-items:center;gap:14px;padding:13px 0;border-bottom:1px solid var(--line)}
.rank-no{width:30px;height:30px;flex:0 0 auto;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;background:var(--soft);color:var(--brand);font-variant-numeric:tabular-nums}
.rank-item:nth-child(-n+3) .rank-no{background:var(--grad);color:#fff}
.rank-main{flex:1;min-width:0}
.rank-top{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.rank-title{font-size:15px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-score{margin-left:auto;font-size:15px;font-weight:800;color:var(--pink);font-variant-numeric:tabular-nums}
.rank-bar{height:6px;border-radius:999px;background:var(--line);overflow:hidden}
.rank-bar span{display:block;height:100%;border-radius:999px;background:var(--grad)}
/* topics */
.topic{background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.topic:hover{transform:translateY(-2px);box-shadow:var(--shadow-h)}
.topic img{width:100%;aspect-ratio:16/9;object-fit:cover}
.topic-body{padding:16px 18px 20px}
.topic-body h3{font-size:17px;font-weight:700;margin-bottom:6px}
.topic-body p{margin:0 0 10px;font-size:14px;color:var(--ink2);line-height:1.65}
/* plans */
.plan{display:flex;flex-direction:column;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 24px;box-shadow:var(--shadow)}
.plan-hot{border-color:#F4B590;background:linear-gradient(180deg,#FFF4ED 0%,#FFFFFF 60%);transform:translateY(-8px);box-shadow:var(--shadow-h)}
.plan h3{font-size:17px;font-weight:800}
.plan-price{font-size:34px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--brand);line-height:1.2}
.plan-price small{font-size:14px;font-weight:600;color:var(--ink2);margin-left:4px}
.plan-note{font-size:12px;color:var(--ink2);margin-top:-8px}
.plan ul{display:flex;flex-direction:column;gap:9px;margin:4px 0 6px}
.plan li{display:flex;gap:8px;font-size:14px;color:var(--ink2)}
.plan li::before{content:"✓";color:var(--brand);font-weight:800}
.plan-badge{align-self:flex-start;background:var(--grad);color:#fff;border-radius:999px;padding:4px 12px;font-size:12px;font-weight:700}
/* reviews */
.review-wall{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{background:#fff;border-radius:var(--r);padding:20px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.review:nth-child(2n){transform:translateY(8px) rotate(-1deg)}
.review:nth-child(3n){transform:translateY(-6px) rotate(.8deg)}
.review:hover{transform:translateY(-2px) rotate(0);box-shadow:var(--shadow-h)}
.review-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.avatar{width:38px;height:38px;border-radius:999px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;flex:0 0 auto}
.review-name{font-size:14px;font-weight:700}
.stars{color:#FFB020;font-size:13px;letter-spacing:2px}
.review p{margin:0;font-size:14px;color:var(--ink2);line-height:1.7}
/* stats */
.stats-band{background:var(--grad);border-radius:28px;padding:48px 32px;color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-num{font-size:clamp(28px,3.6vw,40px);font-weight:800;font-variant-numeric:tabular-nums;line-height:1.2}
.stat-label{font-size:13px;opacity:.92;margin-top:4px}
.stats-note{text-align:center;font-size:14px;margin:26px 0 0;opacity:.94}
/* news */
.news-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px}
.news-item{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.news-item img{width:120px;flex:0 0 auto;aspect-ratio:4/3;object-fit:cover;border-radius:12px}
.news-item h3{font-size:15px;font-weight:700;margin-bottom:4px;line-height:1.5}
.news-item time{font-size:13px;color:var(--ink2)}
/* faq */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-left:3px solid transparent;border-radius:16px;margin-bottom:12px;overflow:hidden;transition:border-color .2s,box-shadow .2s}
.faq-item[open]{border-left-color:var(--brand);box-shadow:var(--shadow)}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;color:var(--brand);font-weight:800;line-height:1}
.faq-item[open] summary::after{content:"−"}
.faq-item p{margin:0;padding:0 22px 20px;font-size:15px;color:var(--ink2);line-height:1.75}
/* cta */
.cta-card{background:var(--grad);border-radius:28px;padding:56px 32px;text-align:center;color:#fff;box-shadow:0 18px 40px rgba(228,113,59,.28)}
.cta-card h2{font-size:clamp(24px,3.2vw,34px);font-weight:800;margin-bottom:12px}
.cta-card p{max-width:620px;margin:0 auto 26px;font-size:15px;opacity:.95}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
/* footer */
.site-footer{background:#2E1F1A;color:#E7D8CF;padding:56px 0 24px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.foot-brand .brand-name{color:#fff}
.site-footer p{margin:0;color:#B9A298;font-size:13px;line-height:1.8}
.site-footer h3{font-size:14px;font-weight:700;color:#fff;margin-bottom:12px}
.site-footer li{margin-bottom:8px}
.site-footer a{color:#C6B0A5;font-size:13px;transition:color .2s}
.site-footer a:hover{color:var(--brand);text-decoration:underline}
.copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:32px;padding-top:18px;text-align:center;font-size:13px;color:#9C8479}
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .g4{grid-template-columns:repeat(3,1fr)}
  .g5,.g6{grid-template-columns:repeat(3,1fr)}
  .demo-grid{grid-template-columns:1fr}
  .review-wall{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .sec{padding:48px 0}
  .g4,.g3,.g5,.g6{grid-template-columns:repeat(2,1fr);gap:16px}
  .rank-list,.news-list{grid-template-columns:1fr;gap:0}
  .review-wall{grid-template-columns:1fr}
  .review:nth-child(2n),.review:nth-child(3n){transform:none}
  .plan-hot{transform:none}
  .header-inner{height:62px;gap:12px}
  .main-nav{position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:#FFFDFA;border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(196,120,80,.16);padding:8px 16px 16px;display:none}
  .main-nav.is-open{display:flex}
  .main-nav a{padding:12px 8px;border-radius:10px}
  .nav-toggle{display:flex}
  .header-actions .btn-primary{display:none}
  .stats-band{padding:36px 20px}
  .cta-card{padding:40px 20px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .g4,.g3,.g5,.g6,.g2{grid-template-columns:repeat(2,1fr);gap:12px}
  .card{border-radius:16px}
  .thumb img{aspect-ratio:16/10}
  .card-body{padding:10px 11px 14px}
  .card-title{font-size:14px}
  .card-meta{font-size:12px}
  .pill{font-size:11px;padding:3px 9px}
  .hero-actions .btn{width:100%}
  .hero-nums{gap:18px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:22px}
  .foot-grid{grid-template-columns:1fr}
  .news-item img{width:96px}
}