/* roulang page: index */
:root{
  --ink:#071C18;
  --teal:#0FA98D;
  --deep:#0B7A6A;
  --lime:#C8F45A;
  --orange:#FF7A3D;
  --bg:#F4F7F1;
  --card:#FFFFFF;
  --text:#11241F;
  --muted:#5A6E66;
  --line:#DDE7DF;
  --r-lg:24px;
  --r-md:18px;
  --sh:0 12px 30px rgba(7,28,24,.08);
  --sh-h:0 18px 42px rgba(7,28,24,.14);
  --grad:linear-gradient(135deg,#071C18 0%,#0B7A6A 62%,#C8F45A 120%);
  --font:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --num:"DIN Alternate","Barlow","Roboto Condensed",ui-monospace,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.7;color:var(--text);background:var(--bg)}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:800;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
section[id]{scroll-margin-top:88px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;height:50px;padding:0 28px;border:0;border-radius:999px;font-size:16px;font-weight:700;cursor:pointer;transition:transform .25s,box-shadow .25s,filter .25s,background .25s;white-space:nowrap}
.btn-primary{background:linear-gradient(120deg,#0FA98D,#0B7A6A);color:#fff;box-shadow:0 10px 22px rgba(11,122,106,.3)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 16px 34px rgba(11,122,106,.4)}
.btn-ghost-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn-ghost-light:hover{background:rgba(200,244,90,.14);border-color:var(--lime);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn-ghost:hover{background:rgba(15,169,141,.1);transform:translateY(-2px)}

/* 徽章 */
.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.01em;white-space:nowrap}
.badge-live{background:rgba(255,122,61,.14);color:#E85F22}
.badge-dark{background:rgba(7,28,24,.72);color:#fff;backdrop-filter:blur(4px)}
.badge-soft{background:rgba(15,169,141,.12);color:var(--deep)}
.badge-lime{background:var(--lime);color:#12260F}
.dot{width:7px;height:7px;border-radius:50%;background:var(--orange);animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.75)}}

/* 头部 */
.site-head{position:sticky;top:0;z-index:50;background:#071C18;border-bottom:1px solid rgba(255,255,255,.08)}
.head-inner{position:relative;display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px;color:#fff}
.brand-mark{width:42px;height:42px;border-radius:12px;background:var(--grad);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.brand-mark svg{width:24px;height:24px}
.brand-name{font-size:18px;font-weight:800;letter-spacing:.01em}
.nav{display:flex;align-items:center;gap:6px}
.nav a{position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;border-radius:999px;font-size:15px;color:rgba(255,255,255,.82);transition:background .2s,color .2s}
.nav a:hover{background:rgba(200,244,90,.12);color:#fff}
.nav a.is-active{background:rgba(15,169,141,.2);color:#fff}
.nav a.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--lime),var(--teal))}
.nav-toggle{display:none;align-items:center;justify-content:center;height:44px;padding:0 18px;border:1px solid rgba(255,255,255,.3);border-radius:999px;background:transparent;color:#fff;font-size:15px;cursor:pointer}

/* 首屏 */
.hero{position:relative;background:radial-gradient(1100px 520px at 82% -12%,rgba(200,244,90,.16),transparent 62%),linear-gradient(135deg,#071C18 0%,#0B3A32 58%,#0B7A6A 130%);color:#fff;padding:64px 0 84px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.hero-copy .badge{margin-bottom:20px}
.hero h1{font-size:60px;letter-spacing:-.02em;margin-bottom:16px}
.hero h1 .hl{background:linear-gradient(100deg,#C8F45A,#7CE0B8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:19px;font-weight:600;color:rgba(255,255,255,.94);margin-bottom:16px}
.hero-desc{font-size:15.5px;line-height:1.8;color:rgba(255,255,255,.72);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:18px}
.hero-note{font-size:14px;color:rgba(255,255,255,.56)}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/10;box-shadow:0 26px 60px rgba(0,0,0,.4);margin:0}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media .badge{position:absolute}
.hero-b1{top:16px;left:16px}
.hero-b2{top:16px;right:16px;background:rgba(200,244,90,.92);color:#12260F}
.hero-b3{bottom:16px;left:16px}

/* 通用板块 */
.section{padding:88px 0}
.section-white{background:#fff}
.section-mint{background:#EAF6F0}
.sec-head{max-width:780px;margin-bottom:40px}
.sec-head h2{font-size:36px;margin-bottom:12px}
.sec-head p{font-size:15.5px;color:var(--muted)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;height:26px;padding:0 12px;border-radius:999px;background:rgba(15,169,141,.12);color:var(--deep);font-size:13px;font-weight:700;margin-bottom:14px}

/* 痛点 */
.cards{display:grid;gap:24px}
.cards--4{grid-template-columns:repeat(4,1fr)}
.cards--3{grid-template-columns:repeat(3,1fr)}
.cards--2{grid-template-columns:repeat(2,1fr)}
.pain{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh);transition:transform .25s,box-shadow .25s}
.pain:hover{transform:translateY(-4px);box-shadow:var(--sh-h)}
.pain .ico{display:flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,rgba(15,169,141,.16),rgba(200,244,90,.32));color:var(--deep);margin-bottom:18px}
.pain .ico svg{width:22px;height:22px}
.pain h3{font-size:20px;margin-bottom:8px}
.pain p{font-size:15px;color:var(--muted)}

/* 解决方案 */
.solve{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:32px;padding:48px;box-shadow:var(--sh)}
.solve h2{font-size:36px;margin-bottom:16px}
.solve p.lead{font-size:15.5px;color:var(--muted);margin-bottom:26px}
.solve-list{display:flex;flex-direction:column;gap:14px}
.solve-list li{display:flex;gap:14px;align-items:flex-start;padding:16px 18px;background:#F4F9F6;border-radius:var(--r-md);border:1px solid var(--line)}
.solve-list .badge{flex:0 0 auto;margin-top:2px}
.solve-list strong{display:block;font-size:16px;margin-bottom:2px}
.solve-list span{font-size:14.5px;color:var(--muted)}
.solve-media{margin:0;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:4/3;box-shadow:var(--sh)}
.solve-media img{width:100%;height:100%;object-fit:cover}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.step{position:relative;padding-top:26px}
.step::before{content:"";position:absolute;top:8px;left:0;right:0;height:2px;background:linear-gradient(90deg,rgba(15,169,141,.35),rgba(200,244,90,.5));border-radius:2px}
.step-num{font-family:var(--num);font-size:34px;font-weight:700;color:var(--teal);line-height:1;margin-bottom:14px;letter-spacing:.02em}
.step h3{font-size:20px;margin-bottom:8px}
.step p{font-size:15px;color:var(--muted)}

/* 数据带 */
.stat-band{background:var(--grad);border-radius:32px;padding:52px 44px;display:grid;grid-template-columns:repeat(4,1fr);gap:28px;color:#fff}
.stat-band .num{font-family:var(--num);font-size:42px;font-weight:700;line-height:1.1;letter-spacing:.01em}
.stat-band .num small{font-size:18px;font-weight:600;margin-left:4px}
.stat-band .lbl{font-size:14.5px;color:rgba(255,255,255,.78);margin-top:6px}

/* 直播间卡片 */
.live-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh);transition:transform .25s,box-shadow .25s}
.live-card:hover{transform:translateY(-6px);box-shadow:var(--sh-h)}
.live-cover{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:#0B3A32}
.live-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.live-card:hover .live-cover img{transform:scale(1.06)}
.live-cover .badge{position:absolute}
.live-cover .b-live{top:10px;left:10px;background:rgba(7,28,24,.78);color:#fff}
.live-cover .b-count{bottom:10px;right:10px}
.live-body{padding:16px 18px 20px}
.live-body h3{font-size:17px;margin-bottom:8px}
.live-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13.5px;color:var(--muted)}
.tag{display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:999px;background:rgba(15,169,141,.1);color:var(--deep);font-size:12.5px;font-weight:600}

/* 即将开播 */
.up-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh);transition:transform .25s,box-shadow .25s}
.up-card:hover{transform:translateY(-6px);box-shadow:var(--sh-h)}
.up-cover{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:#0B3A32}
.up-cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.up-card:hover .up-cover img{transform:scale(1.06)}
.up-time{position:absolute;left:10px;top:10px;background:rgba(7,28,24,.8);color:var(--lime);font-family:var(--num);font-weight:700;font-size:14px;padding:4px 12px;border-radius:999px;letter-spacing:.03em}
.up-body{padding:16px 18px 20px}
.up-body h3{font-size:17px;margin-bottom:8px}
.up-body p{font-size:13.5px;color:var(--muted)}

/* 频道 */
.channels{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.chan{display:flex;flex-direction:column;gap:10px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);padding:24px 20px;box-shadow:var(--sh);transition:transform .25s,box-shadow .25s,border-color .25s}
.chan:hover{transform:translateY(-4px);box-shadow:var(--sh-h);border-color:rgba(15,169,141,.4)}
.chan h3{font-size:18px}
.chan p{font-size:14px;color:var(--muted);flex:1}
.chan .badge{align-self:flex-start}

/* 人气榜 */
.rank{display:flex;flex-direction:column;gap:10px}
.rank-row{display:grid;grid-template-columns:56px minmax(0,1fr) 110px 96px 160px;gap:16px;align-items:center;padding:14px 20px;background:var(--card);border:1px solid var(--line);border-radius:16px;transition:box-shadow .2s,transform .2s}
.rank-row:hover{box-shadow:var(--sh);transform:translateX(3px)}
.rank-no{font-family:var(--num);font-size:22px;font-weight:700;color:var(--deep);line-height:1}
.rank-row.top .rank-no{background:linear-gradient(120deg,#0FA98D,#C8F45A);-webkit-background-clip:text;background-clip:text;color:transparent;font-size:26px}
.rank-name{font-size:16px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-views{font-family:var(--num);font-size:15px;color:var(--muted);letter-spacing:.02em}
.heat{height:6px;border-radius:999px;background:#E7EFE7;overflow:hidden}
.heat span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#0FA98D,#C8F45A)}

/* 证言 */
.voice{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh)}
.voice-head{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.avatar{width:52px;height:52px;aspect-ratio:1/1;border-radius:50%;background:linear-gradient(140deg,#0FA98D,#C8F45A);display:flex;align-items:center;justify-content:center;color:#0A2A24;font-weight:800;font-size:19px;flex:0 0 auto}
.voice-head strong{display:block;font-size:16px}
.voice p{font-size:15px;color:var(--muted)}

/* 人群 */
.who{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:26px 22px;transition:transform .25s,box-shadow .25s}
.who:hover{transform:translateY(-4px);box-shadow:var(--sh-h)}
.who h3{font-size:19px;margin-bottom:8px}
.who p{font-size:14.5px;color:var(--muted)}
.who .ico{display:flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;background:rgba(200,244,90,.35);color:#1F5B33;margin-bottom:16px}
.who .ico svg{width:20px;height:20px}

/* 动态 */
.news-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:start}
.news-lead{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh);transition:transform .25s,box-shadow .25s}
.news-lead:hover{transform:translateY(-4px);box-shadow:var(--sh-h)}
.news-lead figure{margin:0;aspect-ratio:4/3;overflow:hidden;background:#0B3A32}
.news-lead img{width:100%;height:100%;object-fit:cover}
.news-lead .nc{padding:20px 22px 24px}
.news-lead h3{font-size:21px;margin:10px 0 8px}
.news-lead p{font-size:14.5px;color:var(--muted)}
.news-list{display:flex;flex-direction:column;gap:14px}
.news-item{display:grid;grid-template-columns:104px minmax(0,1fr);gap:16px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);padding:12px;transition:box-shadow .2s,transform .2s}
.news-item:hover{box-shadow:var(--sh);transform:translateY(-2px)}
.news-item figure{margin:0;aspect-ratio:4/3;border-radius:12px;overflow:hidden;background:#0B3A32}
.news-item img{width:100%;height:100%;object-fit:cover}
.news-item h3{font-size:15.5px;margin-bottom:6px;line-height:1.45}
.news-item .meta{display:flex;gap:10px;align-items:center;font-size:12.5px;color:var(--muted)}

/* 指标 */
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.metric{background:#EAF6F0;border:1px solid var(--line);border-radius:var(--r-md);padding:24px}
.metric .num{font-family:var(--num);font-size:32px;font-weight:700;color:var(--ink);line-height:1.1}
.metric .num small{font-size:15px;color:var(--muted);margin-left:3px;font-weight:600}
.metric .lbl{font-size:14px;color:var(--muted);margin:6px 0 14px}
.metric .heat{background:#D8EAE0}

/* FAQ */
.faq{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);padding:0 22px;box-shadow:var(--sh);transition:box-shadow .2s}
.faq details[open]{box-shadow:var(--sh-h)}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0;font-size:17px;font-weight:700}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;font-weight:400;color:var(--teal);line-height:1;transition:transform .2s}
.faq details[open] summary::after{content:"−"}
.faq p{padding:0 0 20px;font-size:15px;color:var(--muted);max-width:760px}

/* CTA */
.cta{background:var(--grad);border-radius:32px;padding:56px 48px;color:#fff;display:grid;grid-template-columns:1fr .9fr;gap:48px;align-items:center}
.cta h2{font-size:36px;margin-bottom:12px}
.cta p{font-size:15.5px;color:rgba(255,255,255,.8);margin-bottom:24px;max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.subscribe{display:flex;gap:10px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:20px;padding:16px}
.subscribe input{flex:1;height:48px;min-width:0;padding:0 16px;border:0;border-radius:14px;background:#fff;color:var(--text);font-size:15px;font-family:inherit}
.subscribe input::placeholder{color:#8A9A92}
.subscribe .btn{height:48px}
.sub-note{font-size:12.5px;color:rgba(255,255,255,.6);margin-top:12px}

/* 页脚 */
.site-foot{background:#071C18;color:rgba(255,255,255,.72);padding:64px 0 0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.foot-brand{display:flex;align-items:center;gap:12px;color:#fff;margin-bottom:14px}
.foot-brand .brand-mark{width:38px;height:38px}
.foot-brand span{font-size:17px;font-weight:800}
.site-foot h4{color:#fff;font-size:15px;margin-bottom:14px;font-weight:700}
.site-foot li{margin-bottom:10px;font-size:14.5px}
.site-foot a:hover{color:var(--lime)}
.site-foot p{font-size:14.5px;line-height:1.8}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding:22px 0;font-size:13.5px;color:rgba(255,255,255,.5)}

@media (max-width:1024px){
  .nav-toggle{display:inline-flex}
  .nav{position:absolute;top:calc(100% + 10px);left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:4px;background:#0A241F;border:1px solid rgba(255,255,255,.14);border-radius:var(--r-md);padding:12px;box-shadow:0 24px 50px rgba(0,0,0,.45)}
  .nav.is-open{display:flex}
  .nav a{height:44px;justify-content:flex-start}
  .nav a.is-active::after{display:none}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:52px}
  .cards--4{grid-template-columns:repeat(3,1fr)}
  .channels{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px}
  .stat-band{grid-template-columns:repeat(2,1fr);padding:44px 36px}
  .solve{grid-template-columns:1fr;padding:36px;gap:32px}
  .news-wrap{grid-template-columns:1fr}
  .cta{grid-template-columns:1fr;padding:44px 36px;gap:32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
}

@media (max-width:768px){
  .section{padding:56px 0}
  .hero{padding:48px 0 60px}
  .hero h1{font-size:40px}
  .hero-sub{font-size:17px}
  .sec-head h2,.solve h2,.cta h2{font-size:28px}
  .cards--4,.cards--3,.cards--2{grid-template-columns:repeat(2,1fr)}
  .channels{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .stat-band .num{font-size:34px}
  .rank-row{grid-template-columns:44px minmax(0,1fr) 84px;gap:12px;padding:14px 16px}
  .rank-row .tag{display:none}
  .rank-row .heat{grid-column:1/-1}
  .rank-name{font-size:15px}
  .news-item{grid-template-columns:88px minmax(0,1fr)}
}

@media (max-width:520px){
  .container{padding:0 16px}
  .hero h1{font-size:34px}
  .hero-actions .btn{width:100%}
  .cards--4,.cards--3,.cards--2,.channels,.metrics,.steps{grid-template-columns:1fr}
  .stat-band{grid-template-columns:1fr;padding:32px 24px;gap:20px}
  .solve,.cta{padding:28px 22px;border-radius:24px}
  .subscribe{flex-direction:column}
  .subscribe .btn{width:100%}
  .foot-grid{grid-template-columns:1fr}
  .news-item{grid-template-columns:76px minmax(0,1fr);gap:12px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}