/* roulang page: index */
*,*::before,*::after{box-sizing:border-box}
:root{
--bg:#F7FAF4;--surface-alt:#EDF3EA;--surface:#FFFFFF;--ink:#14201A;--muted:#5E6F64;
--primary:#256B4A;--primary-dark:#123326;--accent:#D9A441;--line:#DDE5DC;
--live:#D94B3D;--blue:#5B7C99;--gold:#B77A1E;
--r-card:14px;--r-img:12px;--r-pill:999px;--r-badge:6px;--r-box:20px;
--sh:0 8px 24px rgba(18,51,38,.05);--sh-h:0 14px 32px rgba(18,51,38,.10);--gap:20px;
}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;font-size:16px;line-height:1.78}
body.nav-open{overflow:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input{font:inherit}
h1,h2,h3{margin:0;line-height:1.2;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.container{max-width:1240px;margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.svg-defs{display:none}
.ic{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 22px;border-radius:var(--r-pill);font-size:15px;font-weight:600;transition:background .18s,color .18s,box-shadow .18s,transform .18s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
.btn-ghost{border:1px solid var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--surface-alt)}
/* header */
.site-header{position:sticky;top:0;z-index:80;background:rgba(247,250,244,.94);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:box-shadow .2s,border-color .2s}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 18px rgba(18,51,38,.06)}
.nav-bar{display:flex;align-items:center;gap:18px;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;letter-spacing:.3px}
.logo-mark{width:40px;height:40px;border-radius:12px;background:var(--primary);display:grid;place-items:center;flex:none}
.logo-mark svg{width:24px;height:24px;fill:none;stroke:#fff;stroke-width:1.5;stroke-linejoin:round}
.nav-links{display:flex;gap:2px;margin-left:auto}
.nav-links a{position:relative;display:inline-flex;align-items:center;height:36px;padding:0 12px;border-radius:var(--r-pill);font-size:15px;color:var(--muted);transition:background .18s,color .18s}
.nav-links a:hover{background:var(--surface-alt);color:var(--ink)}
.nav-links a.is-active{color:var(--ink);font-weight:600}
.nav-links a.is-active::after{content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);width:18px;height:2px;border-radius:2px;background:var(--accent)}
.nav-tools{display:flex;align-items:center;gap:10px;margin-left:8px}
.icon-btn{width:40px;height:40px;border-radius:var(--r-pill);display:grid;place-items:center;color:var(--muted);border:1px solid var(--line);background:var(--surface);transition:color .18s,border-color .18s}
.icon-btn:hover{color:var(--primary);border-color:var(--primary)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--ink);place-items:center}
.drawer{position:fixed;left:0;right:0;top:72px;z-index:70;background:var(--surface);border-bottom:1px solid var(--line);padding:12px 24px 24px;box-shadow:var(--sh);transform:translateY(-12px);opacity:0;visibility:hidden;transition:transform .22s,opacity .22s,visibility .22s}
.drawer.is-open{transform:none;opacity:1;visibility:visible}
.drawer a{display:flex;align-items:center;min-height:44px;padding:6px 4px;font-size:16px;border-bottom:1px solid var(--line)}
.drawer form{display:flex;gap:8px;margin-top:16px}
.drawer input{flex:1;min-height:44px;padding:0 16px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--bg)}
/* hero */
.hero{position:relative;padding:64px 0 84px;overflow:hidden}
.petals{position:absolute;right:-80px;top:-60px;width:560px;opacity:.08;pointer-events:none}
.petals svg{width:100%;height:auto;fill:none;stroke:var(--primary);stroke-width:1.2}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero-q{display:inline-block;font-size:15px;color:var(--muted);border-left:3px solid var(--accent);padding-left:10px}
.hero h1{font-size:56px;line-height:1.15;letter-spacing:-.5px;margin-top:16px}
.mark{background:linear-gradient(transparent 62%,rgba(217,164,65,.42) 62%)}
.hero-sub{margin-top:16px;font-size:20px;font-weight:600;color:var(--primary)}
.hero-text{margin-top:12px;font-size:16px;color:var(--muted);max-width:560px}
.hero-form{display:flex;gap:10px;margin-top:24px;max-width:520px}
.hero-form input{flex:1;min-height:48px;padding:0 18px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--surface);color:var(--ink)}
.hero-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,107,74,.14)}
.hero-actions{display:flex;gap:12px;margin-top:16px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-shot{aspect-ratio:16/9;border:1px solid var(--line);border-radius:var(--r-box);overflow:hidden;box-shadow:var(--sh)}
.hero-shot img{width:100%;height:100%;object-fit:cover}
.hero-chip{position:absolute;display:flex;flex-direction:column;gap:2px;padding:10px 16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh)}
.hero-chip span{font-size:12px;color:var(--muted);line-height:1.4}
.hero-chip strong{font-size:18px;font-variant-numeric:tabular-nums;color:var(--primary-dark)}
.chip-a{left:-18px;bottom:-22px}
.chip-b{right:-10px;top:-20px}
/* sections */
.section{padding:80px 0}
.section-alt{background:var(--surface-alt)}
.sec-head{margin-bottom:36px;max-width:780px}
.sec-head.row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.sec-head h2{font-size:32px}
.sec-sub{margin-top:12px;font-size:15px;line-height:1.8;color:var(--muted)}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--primary);white-space:nowrap;border-bottom:1px solid transparent;transition:border-color .18s,color .18s}
.link-more:hover{color:var(--primary-dark);border-bottom-color:var(--accent)}
/* pain */
.pain-list{margin-top:8px;border-top:1px solid var(--line)}
.pain-list li{display:flex;gap:24px;align-items:flex-start;padding:24px 0;border-bottom:1px solid var(--line);border-left:3px solid var(--accent);padding-left:22px}
.pain-no{font-family:Georgia,serif;font-size:20px;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.4}
.pain-list h3{font-size:19px;margin-bottom:6px}
.pain-list p{font-size:15px;color:var(--muted)}
/* solution */
.solution-grid{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center}
.feat-list{margin-top:28px;display:grid;gap:18px}
.feat-list li{display:flex;gap:14px;align-items:flex-start}
.feat-list .ic{width:22px;height:22px;color:var(--primary);margin-top:4px}
.feat-list h3{font-size:17px;margin-bottom:4px}
.feat-list p{font-size:14px;color:var(--muted)}
.solution-visual{position:relative}
.solution-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-box);border:1px solid var(--line);box-shadow:var(--sh)}
.chip-c{left:24px;bottom:-18px}
/* cards */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:12px;box-shadow:var(--sh);transition:transform .2s,box-shadow .2s,border-color .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-h);border-color:var(--primary)}
.thumb{position:relative;aspect-ratio:16/9;border-radius:var(--r-img);overflow:hidden;background:var(--surface-alt)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.card:hover .thumb img{transform:scale(1.03)}
.badge{position:absolute;left:8px;top:8px;font-size:12px;line-height:1;padding:5px 8px;border-radius:var(--r-badge);font-weight:600}
.badge-hd{color:var(--primary);border:1px solid var(--primary);background:rgba(255,255,255,.92)}
.badge-bd{color:#fff;background:var(--blue)}
.badge-up{color:#fff;background:var(--gold)}
.card-title{margin:12px 0 8px;font-size:16px;line-height:1.45;min-height:46px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:auto;font-size:13px;color:var(--muted)}
.rate{display:inline-flex;align-items:center;gap:4px;color:var(--gold);font-weight:600;font-variant-numeric:tabular-nums}
.rate svg{width:14px;height:14px;fill:var(--accent);stroke:none}
.cat-plain{font-size:12px;color:var(--muted);background:var(--surface-alt);border-radius:var(--r-badge);padding:3px 8px;white-space:nowrap}
/* hot */
.grid-hot{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.hot-card.wide{grid-column:span 2}
.hot-card.wide .thumb{aspect-ratio:16/8}
.heat{height:4px;border-radius:2px;background:var(--surface-alt);overflow:hidden;margin-top:10px}
.heat i{display:block;height:100%;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--accent))}
/* channels */
.chan-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-box);overflow:hidden}
.chan{display:flex;flex-direction:column;gap:8px;background:var(--surface);padding:26px 22px;min-height:100%}
.chan-no{font-family:Georgia,serif;font-size:14px;letter-spacing:1px;color:var(--accent)}
.chan>.ic{width:24px;height:24px;color:var(--primary);margin-top:2px}
.chan h3{font-size:18px}
.chan p{font-size:14px;line-height:1.7;color:var(--muted)}
.chan-more{display:inline-flex;align-items:center;gap:4px;margin-top:auto;padding-top:12px;font-size:14px;font-weight:600;color:var(--primary);transition:color .18s}
.chan-more:hover{color:var(--gold)}
/* rank */
.rank-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 40px}
.rank-item{display:flex;align-items:center;gap:12px;padding:12px 14px;border-bottom:1px solid var(--line);border-radius:10px;transition:background .18s}
.rank-item:hover{background:var(--surface-alt)}
.rank-no{font-family:Georgia,serif;font-size:18px;width:34px;color:var(--muted);font-variant-numeric:tabular-nums}
.rank-no.top{color:var(--accent);font-weight:700}
.rank-name{flex:1;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rank-heat{width:72px;margin:0}
.rank-val{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;width:42px;text-align:right}
/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.steps li{position:relative;padding-top:60px}
.step-no{position:absolute;top:0;left:0;width:44px;height:44px;border-radius:50%;background:var(--surface);border:1px solid var(--primary);color:var(--primary);display:grid;place-items:center;font-weight:700;font-variant-numeric:tabular-nums}
.steps li::before{content:"";position:absolute;top:22px;left:60px;right:-28px;height:1px;background:var(--line)}
.steps li:last-child::before{display:none}
.steps h3{font-size:19px;margin-bottom:6px}
.steps p{font-size:15px;color:var(--muted)}
/* data band */
.section-data{background:var(--surface-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);margin-top:32px}
.stat{padding:0 28px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0;padding-left:0}
.stat strong{display:block;font-size:44px;line-height:1.1;letter-spacing:-1px;color:var(--primary-dark);font-variant-numeric:tabular-nums}
.stat em{font-size:16px;font-style:normal;color:var(--muted);margin-left:4px}
.stat span{font-size:14px;color:var(--muted)}
/* quotes */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);align-items:start}
.quote{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 24px;box-shadow:var(--sh)}
.quote:nth-child(2){margin-top:28px}
.quote:nth-child(3){margin-top:12px}
.quote-mark{position:absolute;right:18px;top:0;font-family:Georgia,serif;font-size:60px;line-height:1;color:var(--primary);opacity:.12}
.quote p{font-size:15px;line-height:1.8}
.quote-user{display:flex;align-items:center;gap:10px;margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.avatar{width:40px;height:40px;border-radius:50%;object-fit:cover;border:1px solid var(--line)}
.quote-user b{display:block;font-size:15px}
.quote-user small{font-size:13px;color:var(--muted)}
/* people */
.people-wrap{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start}
.people-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.person{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh);transition:border-color .18s,transform .18s}
.person:hover{border-color:var(--primary);transform:translateY(-3px)}
.person .ic{width:22px;height:22px;color:var(--primary)}
.person h3{font-size:17px;margin:10px 0 6px}
.person p{font-size:14px;color:var(--muted)}
/* news */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 44px}
.news-item{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--line)}
.news-thumb{width:120px;height:80px;flex:none;border-radius:10px;overflow:hidden;background:var(--surface-alt)}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-item h3{font-size:16px;line-height:1.5;transition:color .18s;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item:hover h3{color:var(--primary)}
.news-date{display:block;margin-top:6px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
/* kpi */
.kpi-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:32px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-box);overflow:hidden}
.kpi{background:var(--surface);padding:24px 16px;text-align:center}
.kpi strong{display:block;font-size:30px;color:var(--primary-dark);font-variant-numeric:tabular-nums;line-height:1.3}
.kpi span{font-size:13px;color:var(--muted)}
/* faq */
.faq-wrap{display:grid;grid-template-columns:4fr 7fr;gap:48px;max-width:900px;margin:0 auto;align-items:start}
.faq details{border-bottom:1px solid var(--line);padding:10px 0}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;font-size:16px;font-weight:600;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:20px;line-height:1;color:var(--primary)}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:6px 0 8px;font-size:15px;color:var(--muted);max-width:620px}
/* cta */
.cta{position:relative;overflow:hidden;background:var(--primary-dark);color:#fff;padding:72px 0}
.cta .petals{right:-60px;top:-120px;opacity:.10}
.cta .petals svg{stroke:#fff}
.cta-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.cta h2{font-size:34px;color:#fff}
.cta p{margin-top:12px;color:rgba(255,255,255,.78);font-size:15px}
.cta-actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.cta .btn-primary{background:var(--accent);color:var(--primary-dark)}
.cta .btn-primary:hover{background:#c8933a}
.cta .btn-ghost{border-color:rgba(255,255,255,.5);color:#fff}
.cta .btn-ghost:hover{background:rgba(255,255,255,.12)}
.cta-form{display:flex;gap:10px}
.cta-form input{flex:1;min-height:48px;padding:0 18px;border:1px solid transparent;border-radius:var(--r-pill);background:rgba(255,255,255,.95);color:var(--ink)}
.cta-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,107,74,.3)}
.form-note{margin-top:10px;font-size:13px;color:rgba(255,255,255,.6)}
/* footer */
.site-footer{background:var(--surface);border-top:1px solid var(--line);padding:56px 0 0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.foot-brand p{margin-top:12px;font-size:14px;color:var(--muted);max-width:280px}
.foot-col h4{margin:0 0 12px;font-size:15px}
.foot-col a{display:block;padding:6px 0;font-size:14px;color:var(--muted);transition:color .18s}
.foot-col a:hover{color:var(--primary)}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:40px;padding:18px 0;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
@media (max-width:1024px){
.nav-bar{height:64px}
.nav-links,.nav-tools{display:none}
.nav-toggle{display:grid;margin-left:auto}
.drawer{top:64px}
.section{padding:64px 0}
.hero{padding:48px 0 64px}
.hero h1{font-size:42px}
.hero-grid{grid-template-columns:1fr;gap:44px}
.grid-4{grid-template-columns:repeat(3,1fr)}
.grid-hot{grid-template-columns:repeat(2,1fr)}
.hot-card.wide .thumb{aspect-ratio:16/9}
.chan-grid{grid-template-columns:repeat(3,1fr)}
.solution-grid{grid-template-columns:1fr;gap:36px}
.quote-grid{grid-template-columns:1fr 1fr}
.quote:nth-child(2),.quote:nth-child(3){margin-top:0}
.people-wrap{grid-template-columns:1fr;gap:32px}
.faq-wrap{grid-template-columns:1fr;gap:24px}
.cta-inner{grid-template-columns:1fr;gap:32px}
.sec-head h2{font-size:30px}
}
@media (max-width:768px){
.grid-4{grid-template-columns:repeat(2,1fr)}
.chan-grid{grid-template-columns:1fr}
.rank-grid{grid-template-columns:1fr;gap:0}
.steps{grid-template-columns:1fr;gap:24px}
.steps li{padding-top:0;padding-left:64px}
.steps li::before{display:none}
.news-grid{grid-template-columns:1fr}
.kpi-row{grid-template-columns:repeat(2,1fr)}
.quote-grid{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr 1fr}
.stat-row{grid-template-columns:1fr;gap:18px}
.stat{border-left:0;padding:16px 0 0;border-top:1px solid var(--line)}
.stat:first-child{padding-top:0;border-top:0}
.people-grid{grid-template-columns:1fr}
.hero-visual{display:flex;flex-direction:column;gap:10px}
.hero-shot{order:-1}
.hero-chip{position:static;flex-direction:row;align-items:baseline;gap:8px;padding:8px 14px;box-shadow:none}
.hero h1{font-size:36px}
.sec-head.row{flex-direction:column;align-items:flex-start;gap:12px}
.pain-list li{gap:16px;padding-left:16px}
}
@media (max-width:520px){
.container{padding:0 18px}
.hero h1{font-size:32px}
.hero-sub{font-size:18px}
.sec-head h2{font-size:26px}
.hero-form{flex-direction:column}
.hero-form .btn,.hero-actions .btn{width:100%}
.hero-actions{flex-direction:column}
.cta-actions{flex-direction:column}
.cta-actions .btn{width:100%}
.cta-form{flex-direction:column}
.cta h2{font-size:26px}
.grid-hot{grid-template-columns:1fr}
.hot-card.wide{grid-column:span 1}
.kpi-row{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr}
.news-thumb{width:96px;height:64px}
.stat strong{font-size:34px}
.rank-heat{width:52px}
}