/* roulang page: index */
:root{
--ink:#17233A;--ink-2:#5B6B85;--ink-3:#8A99AD;
--brand:#2B5FA8;--brand-dark:#214B86;--brand-soft:#EAF1FB;
--accent:#D9663D;--accent-soft:#FFF0E8;--teal:#2F7D72;
--bg:#F6F8FC;--surface:#FFFFFF;--line:#E3E9F3;--star:#E9A23B;
--r:14px;--r-sm:10px;--sh:0 6px 18px rgba(23,43,77,.06);--sh-h:0 14px 32px rgba(23,43,77,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;font-size:16px;line-height:1.8;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:var(--brand);text-decoration:none}
h1,h2,h3,p{margin:0}
button{font-family:inherit}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:80px 0;scroll-margin-top:88px}
.sec-white{background:var(--surface)}
.sec-soft{background:var(--brand-soft)}
.sec-deep{background:#E3EDFA}
.eyebrow{font-size:12px;letter-spacing:.1em;font-weight:600;color:var(--brand);margin-bottom:10px}
.h2{font-size:32px;font-weight:700;line-height:1.35;letter-spacing:.01em}
.sub{margin-top:12px;max-width:720px;font-size:15px;color:var(--ink-2)}
.btn{display:inline-flex;align-items:center;justify-content:center;height:48px;padding:0 26px;border-radius:var(--r-sm);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background .18s,color .18s,transform .18s,box-shadow .18s}
.btn:focus-visible{outline:2px solid rgba(43,95,168,.28);outline-offset:2px}
.btn-main{background:var(--brand);color:#fff}
.btn-main:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--brand-soft)}
/* header */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;gap:22px;height:72px}
.logo{display:flex;align-items:center;gap:10px;flex:none}
.logo-mark{width:44px;height:44px;border-radius:10px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:700}
.logo-text{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.nav{display:flex;gap:2px}
.nav a{font-size:14px;color:var(--ink-2);padding:8px 12px;border-radius:8px;transition:.16s}
.nav a:hover{background:var(--brand-soft);color:var(--brand)}
.nav a.active{color:var(--brand);font-weight:600;box-shadow:inset 0 -2px 0 var(--brand)}
.hd-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.search{width:180px;height:40px;border-radius:999px;border:1px solid transparent;background:#F1F4FA;padding:0 16px;font-size:14px;color:var(--ink);outline:none;transition:.16s}
.search::placeholder{color:var(--ink-3)}
.search:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(43,95,168,.15)}
.hd-cta{height:40px;padding:0 20px;font-size:14px}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;padding:12px 11px;flex-direction:column;justify-content:space-between;cursor:pointer}
.burger span{display:block;height:2px;background:var(--ink);border-radius:2px}
.mask{position:fixed;inset:0;background:rgba(23,35,58,.45);opacity:0;pointer-events:none;transition:opacity .2s;z-index:70}
.mask.on{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;width:284px;max-width:86vw;height:100%;background:#fff;z-index:80;transform:translateX(100%);transition:transform .24s;padding:20px;overflow-y:auto}
.drawer.on{transform:none}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-top strong{font-size:15px}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:20px;line-height:1;color:var(--ink-2);cursor:pointer}
.drawer nav{display:flex;flex-direction:column;gap:4px;margin:8px 0 18px}
.drawer nav a{padding:12px 12px;border-radius:10px;color:var(--ink);font-size:15px}
.drawer nav a:hover{background:var(--brand-soft);color:var(--brand)}
.drawer .search{width:100%;height:44px;margin-bottom:12px}
.drawer .btn{width:100%}
/* hero */
.hero{padding:64px 0 76px;background-image:linear-gradient(rgba(246,248,252,.94),rgba(246,248,252,.94)),url("/assets/images/e1e69393b919b885.jpg");background-size:cover;background-position:center}
.hero-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:56px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 14px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:12px;letter-spacing:.08em;color:var(--brand);font-weight:600}
h1{margin-top:20px;font-size:46px;line-height:1.2;font-weight:800;letter-spacing:.01em}
h1 em{font-style:normal;color:var(--accent);background:linear-gradient(transparent 66%,var(--accent-soft) 0);padding:0 4px}
.hero-sub{margin-top:16px;font-size:16px;color:var(--ink-2)}
.hero-desc{margin-top:14px;max-width:640px;font-size:15px;color:var(--ink-2)}
.hero-btns{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:16px;box-shadow:var(--sh-h)}
.float{position:absolute;background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);padding:7px 12px;font-size:13px;font-weight:600;box-shadow:0 4px 14px rgba(23,43,77,.1)}
.float-score{top:14px;left:14px;color:var(--ink)}
.float-score i{font-style:normal;color:var(--star)}
.float-ep{bottom:14px;right:14px;background:var(--accent-soft);color:var(--accent);border-color:#F6D8C9}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.chips span{font-size:12px;padding:4px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--ink-2)}
/* pain */
.pain-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:36px}
.pain{background:var(--bg);border-left:3px solid var(--brand);border-radius:var(--r-sm);padding:22px 24px}
.pain h3{font-size:17px;font-weight:600}
.pain p{margin-top:8px;font-size:14px;color:var(--ink-2)}
/* solution */
.sol-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;margin-top:36px}
.sol-grid p{font-size:15px;color:var(--ink-2);margin-bottom:16px;max-width:560px}
.checks{list-style:none;padding:0;margin:22px 0 0;display:flex;flex-direction:column;gap:12px}
.checks li{position:relative;padding-left:30px;font-size:15px;color:var(--ink)}
.checks li::before{content:"";position:absolute;left:0;top:8px;width:18px;height:18px;border-radius:50%;background:var(--brand-soft);border:1.5px solid var(--brand)}
.checks li::after{content:"";position:absolute;left:6px;top:12px;width:6px;height:9px;border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(42deg)}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);overflow:hidden}
.panel-hd{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line);font-size:14px;font-weight:600}
.panel-hd span{font-size:12px;font-weight:400;color:var(--ink-3)}
.panel-row{display:flex;align-items:center;gap:12px;padding:13px 18px;border-bottom:1px solid var(--line);font-size:14px}
.panel-row:last-child{border-bottom:0}
.panel-row b{font-weight:600}
.panel-row .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);flex:none}
.panel-row .dot.t2{background:var(--teal)}
.panel-row .dot.t3{background:var(--accent)}
.panel-row .meta{margin-left:auto;font-size:12px;color:var(--ink-3)}
.panel-row .st{font-size:11px;font-weight:600;padding:2px 8px;border-radius:999px;background:var(--brand-soft);color:var(--brand)}
.panel-row .st.t2{background:#E6F3F1;color:var(--teal)}
.panel-row .st.t3{background:var(--accent-soft);color:var(--accent)}
/* poster cards */
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:36px}
.pcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:12px;box-shadow:var(--sh);transition:transform .18s,box-shadow .18s}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--sh-h)}
.pthumb{position:relative;overflow:hidden;border-radius:12px}
.pthumb img{width:100%;aspect-ratio:2/3;object-fit:cover;transition:transform .22s}
.pcard:hover .pthumb img{transform:scale(1.03)}
.badge{position:absolute;top:8px;left:8px;height:22px;display:inline-flex;align-items:center;padding:0 8px;border-radius:999px;font-size:11px;font-weight:600}
.b-hd{background:#E4EDFB;color:#2B5FA8}
.b-bd{background:#E6F3F1;color:var(--teal)}
.b-ep{background:var(--accent-soft);color:var(--accent)}
.score{position:absolute;right:8px;bottom:8px;background:rgba(255,255,255,.94);border-radius:999px;padding:2px 9px;font-size:12px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}
.score i{font-style:normal;color:var(--star)}
.pname{margin-top:12px;font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pcard:hover .pname{color:var(--brand)}
.pmeta{margin-top:4px;font-size:12px;color:var(--ink-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
/* hot horizontal cards */
.hgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:36px}
.hcard{display:flex;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);overflow:hidden;transition:transform .18s,box-shadow .18s}
.hcard:hover{transform:translateY(-4px);box-shadow:var(--sh-h)}
.hcard img{width:40%;aspect-ratio:3/2;object-fit:cover;flex:none}
.hbody{padding:14px 16px;display:flex;flex-direction:column;gap:6px;min-width:0}
.hbody h3{font-size:17px;font-weight:600;line-height:1.4}
.hbody p{font-size:13px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.htags{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin-top:auto}
.htags span{font-size:11px;padding:2px 8px;border-radius:999px;background:var(--brand-soft);color:var(--brand)}
.htags .hs{margin-left:auto;background:none;color:var(--ink);font-size:12px;font-weight:600;padding:0}
.htags .hs i{font-style:normal;color:var(--star)}
/* categories */
.catgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 48px;margin-top:36px}
.cat{display:block;padding:26px 0;border-bottom:1px solid var(--line);transition:.16s}
.cat:hover{background:var(--brand-soft);padding-left:14px;padding-right:14px;border-radius:var(--r-sm)}
.cat-no{font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.08em;font-variant-numeric:tabular-nums}
.cat h3{font-size:18px;font-weight:600;margin-top:4px}
.cat p{margin-top:8px;font-size:14px;color:var(--ink-2);max-width:460px}
.cat-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.cat-tags span{font-size:12px;padding:3px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--ink-2)}
/* special */
.spgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:36px}
.spcard{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:transform .18s,box-shadow .18s}
.spcard:hover{transform:translateY(-4px);box-shadow:var(--sh-h)}
.spimg{position:relative}
.spimg img{width:100%;aspect-ratio:3/2;object-fit:cover}
.spnum{position:absolute;right:10px;bottom:10px;background:#fff;border-radius:999px;padding:2px 10px;font-size:12px;font-weight:600;color:var(--brand)}
.spcard h3{font-size:17px;font-weight:600;padding:16px 18px 0}
.spcard p{padding:6px 18px 20px;font-size:13px;color:var(--ink-2)}
/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:40px}
.step{border-top:2px solid var(--line);padding-top:20px}
.step-no{font-size:26px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.step h3{font-size:17px;font-weight:600;margin-top:8px}
.step p{margin-top:8px;font-size:14px;color:var(--ink-2)}
/* numbers */
.numgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:36px}
.num{background:#fff;border-radius:var(--r);padding:24px;border:1px solid var(--line)}
.num b{display:block;font-size:36px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1.2}
.num span{display:block;margin-top:6px;font-size:13px;color:var(--ink-2)}
/* rank */
.ranks{display:grid;grid-template-columns:1fr 1fr;gap:0 48px;margin-top:36px}
.rank{list-style:none;margin:0;padding:0}
.rank li{display:grid;grid-template-columns:48px 1fr auto auto auto;align-items:center;gap:12px;height:60px;border-bottom:1px solid var(--line);font-size:14px;transition:background .16s;padding:0 8px}
.rank li:hover{background:var(--brand-soft)}
.rk{font-weight:700;color:var(--ink-3);font-variant-numeric:tabular-nums}
.rank li:nth-child(-n+3) .rk{color:var(--accent)}
.rn{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rtag{font-size:11px;padding:2px 9px;border-radius:999px;background:var(--brand-soft);color:var(--brand);white-space:nowrap}
.rh{font-size:12px;color:var(--ink-3);white-space:nowrap}
.rs{font-size:13px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;white-space:nowrap}
.rs i{font-style:normal;color:var(--star)}
/* reviews */
.revgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:36px}
.rev{background:#fff;border-radius:var(--r);padding:22px;box-shadow:var(--sh)}
.rev-top{display:flex;align-items:center;gap:12px}
.avatar{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;font-size:15px;flex:none}
.a1{background:#2B5FA8}.a2{background:#2F7D72}.a3{background:#D9663D}.a4{background:#5B6B85}
.rev-top b{font-size:14px;display:block;line-height:1.4}
.rev-top em{font-style:normal;font-size:12px;color:var(--ink-3)}
.rev p{margin-top:14px;font-size:14px;color:var(--ink-2)}
.rev-foot{display:flex;gap:16px;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:12px;color:var(--ink-3)}
/* crowd */
.crowdgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:36px}
.crowd{background:var(--bg);border-radius:var(--r);padding:24px 20px;border:1px solid var(--line)}
.crowd svg{width:26px;height:26px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.crowd h3{font-size:16px;font-weight:600;margin-top:14px}
.crowd p{margin-top:8px;font-size:13px;color:var(--ink-2)}
/* news */
.newgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 48px;margin-top:36px}
.news-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line);transition:background .16s}
.news-item:hover{background:var(--brand-soft)}
.news-item img{width:96px;height:64px;object-fit:cover;border-radius:8px;flex:none}
.news-item h3{font-size:15px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item time{display:block;margin-top:6px;font-size:12px;color:var(--ink-3);font-variant-numeric:tabular-nums}
/* metrics */
.metricgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px 48px;margin-top:36px}
.metric b{font-size:14px;font-weight:600}
.metric b span{float:right;color:var(--brand);font-variant-numeric:tabular-nums}
.bar{height:8px;border-radius:999px;background:#fff;border:1px solid var(--line);margin-top:10px;overflow:hidden}
.bar i{display:block;height:100%;border-radius:999px;background:var(--brand)}
.metric:nth-child(2) .bar i{background:var(--teal)}
.metric:nth-child(3) .bar i{background:var(--accent)}
.metric:nth-child(4) .bar i{background:#4B7DBF}
/* faq */
.faq-wrap{max-width:880px;margin-top:36px;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.faq-item+.faq-item{border-top:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 22px;background:none;border:0;font-size:16px;font-weight:600;color:var(--ink);text-align:left;cursor:pointer}
.faq-q:focus-visible{outline:2px solid rgba(43,95,168,.28);outline-offset:-2px}
.faq-q i{font-style:normal;font-size:20px;color:var(--brand);transition:transform .2s;flex:none;line-height:1}
.faq-q[aria-expanded="true"] i{transform:rotate(45deg)}
.faq-a{padding:0 22px 20px;font-size:14px;line-height:26px;color:var(--ink-2)}
/* form */
.sub-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-top:20px}
.sub-grid p{font-size:15px;color:var(--ink-2);max-width:480px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:13px;font-weight:600;color:var(--ink)}
.field input{height:48px;border:1px solid var(--line);border-radius:var(--r-sm);padding:0 16px;font-size:15px;color:var(--ink);background:#fff;outline:none;transition:.16s}
.field input::placeholder{color:var(--ink-3)}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(43,95,168,.15)}
.err{font-size:12px;color:#C0392B;display:none}
.err.on{display:block}
.form-row{display:flex;gap:12px;margin-top:4px}
.form-row .btn{flex:none}
.tip{margin-top:10px;font-size:12px;color:var(--ink-3)}
.ok{margin-top:12px;padding:10px 14px;border-radius:var(--r-sm);background:#E6F3F1;color:var(--teal);font-size:13px;display:none}
.ok.on{display:block}
/* final cta */
.final{background:#DCE8F8;text-align:center;padding:76px 0}
.final .h2{margin-bottom:12px}
.final p{max-width:620px;margin:0 auto;font-size:15px;color:var(--ink-2)}
.final .hero-btns{justify-content:center}
.final hr{width:60px;height:2px;border:0;background:var(--brand);opacity:.35;margin:0 auto 24px}
/* footer */
.site-footer{background:var(--bg);border-top:1px solid var(--line);padding:56px 0 24px;font-size:13px;color:var(--ink-2)}
.fgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.fbrand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.fbrand .logo-mark{width:38px;height:38px;border-radius:9px;font-size:13px}
.fbrand b{font-size:15px;color:var(--ink)}
.site-footer h4{font-size:14px;font-weight:600;color:var(--ink);margin:0 0 14px}
.site-footer ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.site-footer a{color:var(--ink-2)}
.site-footer a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.copy{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--ink-3)}
@media(max-width:1024px){
section{padding:56px 0}
.container{padding:0 20px}
.nav,.hd-right .search,.hd-cta{display:none}
.burger{display:flex}
.hero{padding:48px 0 56px}
.hero-grid{grid-template-columns:1fr;gap:36px}
h1{font-size:36px}
.h2{font-size:27px}
.pgrid{grid-template-columns:repeat(3,1fr);gap:18px}
.hgrid{grid-template-columns:repeat(2,1fr)}
.spgrid{grid-template-columns:repeat(2,1fr)}
.crowdgrid{grid-template-columns:repeat(2,1fr)}
.numgrid{grid-template-columns:repeat(2,1fr)}
.sol-grid{grid-template-columns:1fr;gap:36px}
.fgrid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
.hero-grid{gap:28px}
h1{font-size:32px}
.h2{font-size:25px}
.pain-grid{grid-template-columns:1fr}
.pgrid{grid-template-columns:repeat(2,1fr);gap:14px;margin-top:28px}
.hgrid{grid-template-columns:1fr}
.spgrid{grid-template-columns:1fr}
.steps{grid-template-columns:1fr;gap:24px}
.numgrid{grid-template-columns:repeat(2,1fr);gap:16px}
.ranks{grid-template-columns:1fr;gap:0}
.revgrid{grid-template-columns:1fr}
.newgrid{grid-template-columns:1fr}
.metricgrid{grid-template-columns:1fr}
.sub-grid{grid-template-columns:1fr;gap:28px}
.catgrid{grid-template-columns:1fr;gap:0}
.hero-media img{aspect-ratio:16/10;max-height:260px}
.form-row{flex-direction:column}
.form-row .btn{width:100%}
}
@media(max-width:520px){
.container{padding:0 16px}
section{padding:44px 0}
h1{font-size:29px}
.h2{font-size:23px}
.hero-btns .btn{width:100%}
.hero-btns{flex-direction:column}
.pgrid{grid-template-columns:repeat(2,1fr);gap:12px}
.pcard{padding:9px}
.pname{font-size:14px}
.crowdgrid{grid-template-columns:1fr}
.num b{font-size:30px}
.rank li{grid-template-columns:36px 1fr auto auto;height:56px;gap:10px}
.rh{display:none}
.hcard img{width:38%}
.fgrid{grid-template-columns:1fr}
.logo-text{font-size:15px}
.logo-mark{width:40px;height:40px}
}
@media(prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
*{transition:none!important;animation:none!important}
}