/* roulang page: index */
:root{
      --primary:#253b78;
      --primary-dark:#182957;
      --primary-soft:#e9efff;
      --accent:#e98b5b;
      --accent-soft:#fff1e9;
      --ink:#17223b;
      --muted:#68738a;
      --paper:#ffffff;
      --warm:#f7f9fc;
      --blue-bg:#eef4ff;
      --line:#dce4f0;
      --shadow:0 18px 45px rgba(37,59,120,.10);
      --shadow-sm:0 8px 24px rgba(25,45,88,.08);
      --radius:18px;
      --radius-sm:12px;
      --container:1200px;
      --ease:all .25s ease;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
      color:var(--ink);background:var(--warm);line-height:1.75;font-size:15px;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    img{display:block;max-width:100%;height:auto}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    :focus-visible{outline:3px solid rgba(233,139,91,.65);outline-offset:3px}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{
      position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);
      border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(28,48,91,.05)
    }
    .nav-wrap{min-height:78px;display:flex;align-items:center;gap:25px}
    .brand{display:flex;align-items:center;gap:11px;min-width:245px}
    .brand-mark{
      width:38px;height:38px;border-radius:12px;background:var(--primary);
      color:#fff;display:grid;place-items:center;font-weight:800;font-size:17px
    }
    .brand-text{font-weight:800;font-size:16px;line-height:1.3;letter-spacing:.2px}
    .brand-sub{font-size:11px;color:var(--muted);font-weight:500;margin-top:2px}
    .tab-nav{display:flex;gap:8px;align-items:center;flex:1;overflow-x:auto;scrollbar-width:none}
    .tab-nav::-webkit-scrollbar{display:none}
    .tab{
      white-space:nowrap;padding:8px 15px;border:1px solid var(--line);
      border-radius:999px;color:var(--muted);font-size:13px;background:#fbfcff
    }
    .tab:hover,.tab.active{background:var(--primary);border-color:var(--primary);color:#fff}
    .nav-cta,.btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border-radius:10px;padding:11px 18px;font-weight:700;transition:var(--ease)
    }
    .nav-cta,.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 16px rgba(37,59,120,.16)}
    .nav-cta:hover,.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 12px 22px rgba(37,59,120,.22)}
    .btn-secondary{background:#fff;color:var(--primary);border:1px solid #cbd7ed}
    .btn-secondary:hover{border-color:var(--primary);background:var(--primary-soft);transform:translateY(-2px)}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;color:var(--primary);
      font-weight:800;font-size:12px;letter-spacing:1.5px;text-transform:uppercase
    }
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
    h1,h2,h3{color:var(--ink);line-height:1.25;letter-spacing:-.5px}
    h1{font-size:clamp(37px,5vw,66px);font-weight:850;max-width:700px}
    h2{font-size:clamp(27px,3.2vw,42px);font-weight:800}
    h3{font-size:19px;font-weight:800}
    p{color:var(--muted)}
    .section{padding:92px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:34px}
    .section-head p{max-width:550px}
    .hero{padding:82px 0 70px;background:linear-gradient(180deg,#fff 0%,#f3f7ff 100%)}
    .hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:center}
    .hero h1{margin:18px 0 22px}
    .hero-intro{font-size:17px;max-width:635px;margin-bottom:28px}
    .actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:27px}
    .trust-line{display:flex;flex-wrap:wrap;gap:18px;color:var(--muted);font-size:13px}
    .trust-line span{display:flex;align-items:center;gap:7px}
    .trust-line i{width:7px;height:7px;background:var(--accent);border-radius:50%}
    .hero-board{
      background:var(--primary);border-radius:26px;padding:24px;color:#fff;
      box-shadow:var(--shadow);position:relative;overflow:hidden
    }
    .hero-board:after{content:"";position:absolute;width:210px;height:210px;border:1px solid rgba(255,255,255,.13);border-radius:50%;right:-55px;top:-55px}
    .board-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:23px}
    .board-top small{color:#cbd6f4}
    .live-badge,.tag{
      display:inline-flex;align-items:center;border-radius:999px;padding:5px 9px;
      font-size:11px;font-weight:800;letter-spacing:.2px
    }
    .live-badge{background:#ffd7c4;color:#793b25}
    .board-feature{background:rgba(255,255,255,.1);padding:22px;border-radius:17px;margin-bottom:14px}
    .board-feature .num{font-size:43px;line-height:1;color:#ffb18e;font-weight:850}
    .board-feature h3{color:#fff;margin:10px 0 5px}
    .board-feature p{color:#cbd6f4;font-size:13px}
    .board-row{display:flex;align-items:center;gap:13px;padding:14px 2px;border-bottom:1px solid rgba(255,255,255,.13)}
    .board-row:last-child{border-bottom:0}
    .row-num{font-size:20px;color:#ffb18e;font-weight:800;width:28px}
    .board-row strong{font-size:14px}
    .board-row small{display:block;color:#b9c6e7;font-size:12px}
    .entry-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .entry-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:23px;box-shadow:var(--shadow-sm);transition:var(--ease)}
    .entry-card:hover,.content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .entry-card .index{color:var(--accent);font-weight:850;font-size:13px}
    .entry-card h3{margin:10px 0 7px}
    .entry-card p{font-size:13px;min-height:48px}
    .entry-card a{display:inline-block;margin-top:14px;color:var(--primary);font-weight:800;font-size:13px}
    .pain-section{background:#fff}
    .pain-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:70px;align-items:start}
    .pain-layout>div>p{margin-top:18px;max-width:390px}
    .issue-list{display:grid;gap:13px}
    .issue{display:grid;grid-template-columns:44px 1fr;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
    .issue-num{width:38px;height:38px;border-radius:11px;background:var(--accent-soft);color:#b65e37;display:grid;place-items:center;font-weight:850}
    .issue h3{font-size:17px;margin-bottom:4px}
    .issue p{font-size:13px}
    .solution{background:var(--blue-bg)}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow-sm)}
    .step{padding:28px 23px;border-right:1px solid var(--line);position:relative}
    .step:last-child{border-right:0}
    .step-num{color:var(--accent);font-size:12px;font-weight:850}
    .step h3{margin:12px 0 8px}
    .step p{font-size:13px}
    .value-band{background:var(--primary);color:#fff}
    .value-band h2,.value-band p{color:#fff}
    .value-band p{opacity:.76}
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-top:33px}
    .metric{border:1px solid rgba(255,255,255,.18);border-radius:15px;padding:20px;background:rgba(255,255,255,.07)}
    .metric strong{font-size:30px;color:#ffb18e;display:block}
    .metric span{font-size:13px;color:#d4ddf4}
    .feature-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:20px}
    .content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:23px;transition:var(--ease);box-shadow:var(--shadow-sm)}
    .feature-main{min-height:285px;background:linear-gradient(135deg,#263e7b,#506ba8);color:#fff;display:flex;flex-direction:column;justify-content:end}
    .feature-main h3,.feature-main p{color:#fff}
    .feature-main p{opacity:.78;font-size:13px;margin:8px 0 17px}
    .feature-main .tag{background:#ffd7c4;color:#793b25;align-self:flex-start}
    .side-list{display:grid;gap:20px}
    .mini-item{display:flex;gap:14px;align-items:flex-start}
    .mini-icon{width:45px;height:45px;border-radius:12px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-weight:850;flex:none}
    .mini-item h3{font-size:16px;margin-bottom:4px}
    .mini-item p{font-size:12px}
    .quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
    .quote{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow-sm)}
    .quote-mark{color:var(--accent);font-size:32px;font-weight:900;line-height:1}
    .quote p{font-size:14px;color:var(--ink);margin:11px 0 20px}
    .quote footer{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}
    .faq-section{background:#fff}
    .faq-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px}
    .faq-list{display:grid;gap:10px}
    details{border:1px solid var(--line);border-radius:13px;background:#fbfcff;padding:17px 20px}
    summary{cursor:pointer;list-style:none;font-weight:750;padding-right:24px;position:relative}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:0;color:var(--primary);font-size:22px;top:-3px}
    details[open]{border-color:#aebfe8;background:#f7f9ff}
    details[open] summary:after{content:"−"}
    details p{font-size:13px;margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
    .subscribe{background:var(--blue-bg)}
    .subscribe-box{display:flex;justify-content:space-between;align-items:center;gap:30px;background:#fff;border:1px solid var(--line);padding:36px 40px;border-radius:22px;box-shadow:var(--shadow-sm)}
    .subscribe-box p{max-width:620px;margin-top:9px}
    .subscribe-form{display:flex;gap:9px;min-width:330px}
    input{width:100%;padding:12px 14px;border:1px solid #cdd8eb;border-radius:10px;background:#fff;color:var(--ink)}
    input::placeholder{color:#9aa6b9}
    input:focus{border-color:var(--primary);outline:3px solid rgba(37,59,120,.12)}
    .form-note{font-size:11px;color:var(--muted);margin-top:8px}
    .site-footer{background:#fff;border-top:1px solid var(--line);padding:34px 0 23px}
    .footer-top{display:flex;justify-content:space-between;gap:35px;align-items:start}
    .footer-brand p{font-size:12px;margin-top:8px;max-width:350px}
    .footer-links{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:13px}
    .footer-links a:hover{color:var(--primary)}
    .footer-bottom{border-top:1px solid var(--line);margin-top:27px;padding-top:17px;display:flex;justify-content:space-between;gap:15px;color:#8b95a7;font-size:11px}
    .muted-label{color:var(--muted);font-size:12px;font-weight:700}
    @media(max-width:900px){
      .brand{min-width:auto}.nav-wrap{gap:15px}.nav-cta{padding:9px 12px;font-size:12px}
      .hero-grid,.pain-layout,.faq-grid{grid-template-columns:1fr;gap:38px}
      .hero{padding-top:60px}.feature-layout{grid-template-columns:1fr}
    }
    @media(max-width:768px){
      .container{width:min(100% - 30px,var(--container))}
      .nav-wrap{min-height:70px;flex-wrap:wrap;padding:12px 0;gap:10px}
      .brand{flex:1}.brand-text{font-size:14px}.tab-nav{order:3;flex-basis:100%;padding-bottom:2px}
      .nav-cta{white-space:nowrap}
      .section{padding:62px 0}.section-head{display:block;margin-bottom:25px}.section-head p{margin-top:12px}
      .entry-strip,.quotes,.metrics{grid-template-columns:1fr 1fr}
      .steps{grid-template-columns:1fr 1fr}.step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .subscribe-box{display:block;padding:27px}.subscribe-form{min-width:0;margin-top:22px}
    }
    @media(max-width:480px){
      h1{font-size:36px}.hero-intro{font-size:15px}.actions .btn{width:100%}
      .entry-strip,.quotes,.metrics,.steps{grid-template-columns:1fr}
      .step{border-right:0!important;border-bottom:1px solid var(--line)}
      .step:last-child{border-bottom:0}.footer-top,.footer-bottom{display:block}.footer-links{margin-top:22px}
      .footer-bottom span{display:block;margin-top:6px}.subscribe-form{display:block}.subscribe-form .btn{width:100%;margin-top:9px}
    }

/* roulang page: category1 */
:root{
 --primary:#253b78;
 --primary-dark:#182957;
 --primary-soft:#e9efff;
 --accent:#e98b5b;
 --accent-soft:#fff1e9;
 --ink:#17223b;
 --muted:#68738a;
 --paper:#fff;
 --warm:#f7f9fc;
 --blue-bg:#eef4ff;
 --line:#dce4f0;
 --shadow:0 18px 45px rgba(37,59,120,.10);
 --shadow-sm:0 8px 24px rgba(25,45,88,.08);
 --radius:18px;
 --radius-sm:12px;
 --container:1200px;
 --ease:all .25s ease;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
 font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
 color:var(--ink);background:var(--warm);line-height:1.75;font-size:15px;
 -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:var(--ease)}
img{display:block;max-width:100%;height:auto}
button,input{font:inherit}
button{border:0;cursor:pointer}
h1,h2,h3{line-height:1.25;letter-spacing:-.025em}
h1{font-size:clamp(34px,4.4vw,58px);font-weight:850}
h2{font-size:clamp(26px,3vw,38px);font-weight:820}
h3{font-size:19px;font-weight:780}
p{color:var(--muted)}
.container{width:min(var(--container),calc(100% - 48px));margin:auto}
.site-header{
 position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);
 border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(28,48,91,.05)
}
.nav-wrap{min-height:78px;display:flex;align-items:center;gap:25px}
.brand{display:flex;align-items:center;gap:11px;min-width:245px}
.brand-mark{
 width:38px;height:38px;border-radius:12px;background:var(--primary);
 color:#fff;display:grid;place-items:center;font-weight:800;font-size:17px
}
.brand-text{font-weight:800;font-size:16px;line-height:1.3;letter-spacing:.2px}
.brand-sub{display:block;font-size:11px;color:var(--muted);font-weight:500;margin-top:2px}
.tab-nav{display:flex;gap:8px;align-items:center;flex:1;overflow-x:auto;scrollbar-width:none}
.tab-nav::-webkit-scrollbar{display:none}
.tab{
 white-space:nowrap;padding:9px 15px;border:1px solid transparent;border-radius:999px;
 color:var(--muted);font-size:13px;font-weight:700
}
.tab:hover{color:var(--primary);background:var(--primary-soft)}
.tab.active{background:var(--primary);color:#fff;box-shadow:0 7px 14px rgba(37,59,120,.16)}
.nav-cta,.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 border-radius:10px;padding:11px 18px;font-weight:700;transition:var(--ease)
}
.nav-cta,.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 16px rgba(37,59,120,.16)}
.nav-cta:hover,.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 12px 22px rgba(37,59,120,.22)}
.btn-secondary{background:#fff;color:var(--primary);border:1px solid #cbd7ed}
.btn-secondary:hover{border-color:var(--primary);background:var(--primary-soft);transform:translateY(-2px)}
.btn:focus-visible,.nav-cta:focus-visible,.tab:focus-visible,input:focus-visible,summary:focus-visible{
 outline:3px solid rgba(233,139,91,.45);outline-offset:3px
}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;color:var(--primary);
 font-weight:800;font-size:12px;letter-spacing:1.5px
}
.eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
.tag,.status{
 display:inline-flex;align-items:center;border-radius:999px;padding:5px 9px;
 font-size:11px;font-weight:800;letter-spacing:.2px
}
.tag{background:var(--primary-soft);color:var(--primary)}
.status{background:var(--accent-soft);color:#9a4c2e}
.page-intro{padding:72px 0 50px;background:linear-gradient(180deg,#fff 0%,#f3f7ff 100%)}
.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:end}
.page-intro h1{margin:18px 0 18px;max-width:730px}
.lead{font-size:17px;max-width:700px}
.intro-note{
 padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);display:flex;gap:16px;align-items:flex-start
}
.note-number{color:var(--accent);font-size:32px;font-weight:850;line-height:1}
.intro-note strong{display:block;margin-bottom:4px}
.intro-note p{font-size:13px}
.browse-section{padding:42px 0 92px}
.toolbar{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:15px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow-sm);
 margin-bottom:28px
}
.filter-tabs{display:flex;gap:8px;overflow-x:auto;flex:1;scrollbar-width:none}
.filter-tabs::-webkit-scrollbar{display:none}
.filter{
 white-space:nowrap;border:1px solid var(--line);background:#fff;color:var(--muted);
 padding:8px 13px;border-radius:9px;font-size:12px;font-weight:700;transition:var(--ease)
}
.filter:hover,.filter.selected{background:var(--primary-soft);border-color:#b9c9ec;color:var(--primary)}
.search-box{position:relative;width:215px;flex:none}
.search-box input{padding:10px 13px 10px 36px;width:100%;height:42px}
.search-icon{position:absolute;left:13px;top:8px;color:var(--muted);font-size:17px}
.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 315px;gap:26px;align-items:start}
.content-list{display:grid;gap:15px}
.content-card{
 display:grid;grid-template-columns:188px 1fr auto;gap:21px;align-items:center;
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:15px;box-shadow:var(--shadow-sm);transition:var(--ease)
}
.content-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.cover{
 aspect-ratio:16/10;border-radius:13px;overflow:hidden;position:relative;
 background:linear-gradient(135deg,#253b78,#6f83b6)
}
.cover:before,.cover:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.28);border-radius:50%}
.cover:before{width:130px;height:130px;right:-42px;top:-34px}
.cover:after{width:72px;height:72px;left:20px;bottom:-35px}
.cover-label{
 position:absolute;left:13px;bottom:12px;color:#fff;font-weight:800;font-size:12px;
 letter-spacing:.5px;z-index:1
}
.cover.two{background:linear-gradient(135deg,#704f78,#d18b82)}
.cover.three{background:linear-gradient(135deg,#3c6475,#91b3bf)}
.cover.four{background:linear-gradient(135deg,#5d587e,#b4a7cc)}
.card-meta{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:10px}
.content-card h3{margin-bottom:7px}
.content-card p{font-size:13px;line-height:1.65}
.card-foot{display:flex;align-items:center;gap:10px;margin-top:13px;font-size:11px;color:var(--muted)}
.card-arrow{color:var(--primary);font-weight:800;font-size:13px;white-space:nowrap}
.side-stack{display:grid;gap:18px}
.side-panel{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:22px;box-shadow:var(--shadow-sm)
}
.side-panel h3{font-size:17px;margin-bottom:16px}
.rank-list{display:grid;gap:0}
.rank-item{display:grid;grid-template-columns:30px 1fr;gap:11px;padding:14px 0;border-bottom:1px solid var(--line)}
.rank-item:last-child{border-bottom:0;padding-bottom:2px}
.rank-num{color:var(--accent);font-weight:850;font-size:20px;line-height:1}
.rank-item strong{font-size:13px;display:block}
.rank-item small{color:var(--muted);font-size:11px}
.tip-panel{background:var(--primary);color:#fff;border-color:var(--primary)}
.tip-panel h3,.tip-panel p{color:#fff}
.tip-panel p{font-size:13px;opacity:.82}
.tip-panel .tag{background:#ffd7c4;color:#793b25;margin-bottom:13px}
.info-strip{
 margin-top:25px;padding:24px 28px;border-radius:var(--radius);
 background:var(--blue-bg);display:flex;justify-content:space-between;align-items:center;gap:25px
}
.info-strip h2{font-size:23px;margin-bottom:5px}
.info-strip p{font-size:13px}
.value-points{display:flex;gap:28px;flex-wrap:wrap}
.value-point{display:flex;gap:9px;align-items:center;color:var(--primary);font-size:12px;font-weight:800}
.value-point b{font-size:22px;color:var(--accent)}
.faq-section{padding:82px 0;background:#fff}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
.section-head p{max-width:560px}
.faq-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:62px}
.faq-list{display:grid;gap:10px}
details{border:1px solid var(--line);border-radius:12px;background:var(--warm);padding:0 18px;transition:var(--ease)}
details[open]{background:#fff;border-color:#bdcceb;box-shadow:var(--shadow-sm)}
summary{list-style:none;cursor:pointer;padding:17px 28px 17px 0;font-weight:750;position:relative}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";position:absolute;right:2px;top:13px;font-size:23px;color:var(--primary);font-weight:400}
details[open] summary:after{content:"−";color:var(--accent)}
details p{font-size:13px;padding:0 0 17px;line-height:1.8}
.cta-section{padding:76px 0}
.cta-box{
 background:var(--primary-soft);border:1px solid #d5e0fb;border-radius:25px;
 padding:42px 48px;display:flex;align-items:center;justify-content:space-between;gap:30px
}
.cta-box h2{margin-bottom:9px}
.cta-box p{font-size:14px;max-width:630px}
.cta-actions{display:flex;gap:10px;flex:none}
.site-footer{background:#fff;border-top:1px solid var(--line);padding:34px 0 23px}
.footer-top{display:flex;justify-content:space-between;gap:35px;align-items:start}
.footer-brand strong{font-size:16px}
.footer-brand p{font-size:12px;margin-top:8px;max-width:350px}
.footer-links{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:13px}
.footer-links a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--line);margin-top:27px;padding-top:17px;display:flex;justify-content:space-between;gap:15px;color:#8b95a7;font-size:11px}
@media(max-width:900px){
 .intro-grid{grid-template-columns:1fr;gap:28px}
 .content-layout{grid-template-columns:1fr}
 .side-stack{grid-template-columns:1fr 1fr}
 .content-card{grid-template-columns:170px 1fr auto}
 .nav-wrap{gap:14px}.brand{min-width:220px}
 .faq-grid{gap:30px}
}
@media(max-width:768px){
 .container{width:min(100% - 32px,var(--container))}
 .nav-wrap{min-height:70px;flex-wrap:wrap;padding:10px 0;gap:9px}
 .brand{min-width:0;flex:1}.brand-text{font-size:14px}.brand-sub{font-size:10px}
 .brand-mark{width:34px;height:34px}
 .nav-cta{padding:9px 12px;font-size:12px}
 .tab-nav{order:3;flex-basis:100%;padding-bottom:2px}
 .page-intro{padding:55px 0 38px}
 .browse-section{padding:28px 0 65px}
 .toolbar{align-items:stretch;flex-direction:column}
 .filter-tabs{width:100%;flex:none}
 .search-box{width:100%}
 .content-card{grid-template-columns:145px 1fr;gap:16px}
 .content-card .card-arrow{grid-column:2}
 .side-stack{grid-template-columns:1fr}
 .info-strip,.cta-box{align-items:flex-start;flex-direction:column;padding:28px}
 .cta-actions{width:100%}
 .cta-actions .btn{flex:1}
 .faq-section{padding:62px 0}
 .section-head{display:block}.section-head p{margin-top:12px}
}
@media(max-width:480px){
 h1{font-size:32px}.lead{font-size:15px}
 .content-card{grid-template-columns:1fr;gap:13px}
 .content-card .card-arrow{grid-column:auto}
 .cover{aspect-ratio:16/8}
 .value-points{gap:14px}
 .footer-top,.footer-bottom{display:block}
 .footer-links{margin-top:20px;gap:12px}
 .footer-bottom span{display:block;margin-top:6px}
 .cta-actions{flex-direction:column}
}

/* roulang page: category2 */
:root{
 --primary:#253b78;
 --primary-dark:#182957;
 --primary-soft:#e9efff;
 --accent:#e98b5b;
 --accent-soft:#fff1e9;
 --ink:#17223b;
 --muted:#68738a;
 --paper:#fff;
 --warm:#f7f9fc;
 --blue-bg:#eef4ff;
 --line:#dce4f0;
 --shadow:0 18px 45px rgba(37,59,120,.10);
 --shadow-sm:0 8px 24px rgba(25,45,88,.08);
 --radius:18px;
 --radius-sm:12px;
 --container:1200px;
 --ease:all .25s ease;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;background:var(--warm);color:var(--ink);
 font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
 font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased
}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(34px,4.5vw,58px);line-height:1.18;letter-spacing:-1.5px;margin-bottom:18px}
h2{font-size:clamp(26px,3vw,38px);line-height:1.3;margin-bottom:12px}
h3{font-size:18px;line-height:1.4;margin-bottom:8px}
p{color:var(--muted)}
a{color:inherit;text-decoration:none;transition:var(--ease)}
img{display:block;max-width:100%;height:auto}
button,input{font:inherit}
button{border:0;cursor:pointer}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
.site-header{
 position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);
 border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(28,48,91,.05)
}
.nav-wrap{min-height:78px;display:flex;align-items:center;gap:25px}
.brand{display:flex;align-items:center;gap:11px;min-width:245px}
.brand-mark{
 width:38px;height:38px;border-radius:12px;background:var(--primary);color:#fff;
 display:grid;place-items:center;font-weight:800;font-size:17px
}
.brand-text{font-weight:800;font-size:16px;line-height:1.3;letter-spacing:.2px}
.brand-sub{display:block;font-size:11px;color:var(--muted);font-weight:500;margin-top:2px}
.tab-nav{display:flex;gap:8px;align-items:center;flex:1;overflow-x:auto;scrollbar-width:none}
.tab-nav::-webkit-scrollbar{display:none}
.tab{
 white-space:nowrap;padding:9px 15px;border:1px solid transparent;border-radius:999px;
 color:var(--muted);font-size:13px;font-weight:700
}
.tab:hover{color:var(--primary);background:var(--primary-soft)}
.tab.active{background:var(--primary);color:#fff;box-shadow:0 6px 14px rgba(37,59,120,.16)}
.nav-cta,.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 border-radius:10px;padding:11px 18px;font-weight:700;transition:var(--ease)
}
.nav-cta,.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 16px rgba(37,59,120,.16)}
.nav-cta:hover,.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 12px 22px rgba(37,59,120,.22)}
.btn-secondary{background:#fff;color:var(--primary);border:1px solid #cbd7ed}
.btn-secondary:hover{border-color:var(--primary);background:var(--primary-soft);transform:translateY(-2px)}
.btn:focus-visible,.nav-cta:focus-visible,.tab:focus-visible,a:focus-visible,input:focus-visible{
 outline:3px solid rgba(233,139,91,.55);outline-offset:3px
}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;color:var(--primary);
 font-weight:800;font-size:12px;letter-spacing:1.5px
}
.eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
.hero{
 padding:76px 0 62px;background:linear-gradient(180deg,#fff 0%,#f3f7ff 100%);
 border-bottom:1px solid var(--line)
}
.hero-grid{display:grid;grid-template-columns:1.03fr .97fr;gap:68px;align-items:center}
.hero-intro{font-size:17px;max-width:640px;margin-bottom:25px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-panel{
 background:var(--primary);border-radius:26px;padding:25px;color:#fff;
 box-shadow:var(--shadow);position:relative;overflow:hidden
}
.hero-panel:after{
 content:"";position:absolute;width:250px;height:250px;border:1px solid rgba(255,255,255,.13);
 border-radius:50%;right:-76px;top:-74px
}
.panel-top{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:1}
.live-badge,.tag{
 display:inline-flex;align-items:center;border-radius:999px;padding:5px 10px;
 font-size:11px;font-weight:800;letter-spacing:.2px
}
.live-badge{background:#ffd7c4;color:#793b25}
.panel-label{font-size:12px;color:#cbd6f4}
.icon-matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:23px 0}
.matrix-cell{
 min-height:76px;border:1px solid rgba(255,255,255,.16);border-radius:14px;
 background:rgba(255,255,255,.08);padding:11px;display:flex;flex-direction:column;justify-content:space-between
}
.matrix-symbol{font-size:22px;color:#ffb18e;font-weight:800}
.matrix-cell span:last-child{font-size:11px;color:#d5def3}
.status-bar{padding-top:17px;border-top:1px solid rgba(255,255,255,.15);display:flex;justify-content:space-between;gap:15px}
.status-bar strong{display:block;color:#fff;font-size:14px}
.status-bar small{color:#b9c6e7;font-size:11px}
.section{padding:86px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
.section-head p{max-width:550px;margin-bottom:0}
.index-strip{
 display:grid;grid-template-columns:1.05fr .95fr;gap:18px;
 background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:var(--shadow-sm)
}
.strip-main{background:var(--blue-bg);border-radius:16px;padding:24px;display:flex;justify-content:space-between;gap:20px;align-items:end}
.strip-main h3{font-size:23px;margin-bottom:7px}
.strip-main p{font-size:13px;margin-bottom:0}
.strip-code{font-size:44px;line-height:1;color:var(--primary);font-weight:850}
.strip-side{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.topic-chip{
 border:1px solid var(--line);border-radius:15px;padding:17px;background:#fff;
 transition:var(--ease)
}
.topic-chip:hover{border-color:#aebde0;transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.topic-chip strong{display:block;color:var(--primary);font-size:14px;margin-bottom:4px}
.topic-chip span{font-size:12px;color:var(--muted)}
.filter-shell{
 background:#fff;border:1px solid var(--line);border-radius:18px;padding:15px;
 box-shadow:var(--shadow-sm);display:flex;gap:11px;align-items:center;flex-wrap:wrap;margin-bottom:27px
}
.filter-label{font-size:12px;font-weight:800;color:var(--primary);padding:0 7px}
.filter-button{
 border:1px solid var(--line);background:var(--warm);color:var(--muted);
 border-radius:9px;padding:8px 13px;font-size:12px;font-weight:700;transition:var(--ease)
}
.filter-button:hover,.filter-button.active{background:var(--primary-soft);border-color:#aebde0;color:var(--primary)}
.search-box{margin-left:auto;display:flex;gap:8px;min-width:235px}
input{
 width:100%;padding:10px 13px;border:1px solid #cdd8eb;border-radius:10px;
 background:#fff;color:var(--ink)
}
input::placeholder{color:#9aa6b9}
input:focus{border-color:var(--primary);outline:3px solid rgba(37,59,120,.12)}
.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:25px}
.topic-flow{display:grid;gap:14px}
.topic-card{
 display:grid;grid-template-columns:150px 1fr auto;gap:20px;align-items:center;
 background:#fff;border:1px solid var(--line);border-radius:17px;padding:15px;
 box-shadow:var(--shadow-sm);transition:var(--ease)
}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.cover{
 height:104px;border-radius:12px;background:linear-gradient(140deg,#dbe6ff,#899bc8);
 position:relative;overflow:hidden;display:grid;place-items:center;color:var(--primary)
}
.cover:before,.cover:after{
 content:"";position:absolute;border:1px solid rgba(37,59,120,.18);border-radius:50%
}
.cover:before{width:95px;height:95px;left:-22px;top:-26px}
.cover:after{width:70px;height:70px;right:-18px;bottom:-20px}
.cover b{position:relative;z-index:1;font-size:28px}
.card-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.tag{background:var(--accent-soft);color:#a45734;padding:4px 8px}
.tag.blue{background:var(--primary-soft);color:var(--primary)}
.topic-card h3{margin-bottom:5px;font-size:17px}
.topic-card p{font-size:12px;margin-bottom:0}
.card-action{white-space:nowrap;color:var(--primary);font-size:12px;font-weight:800}
.side-column{display:grid;gap:16px;align-content:start}
.side-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:21px;box-shadow:var(--shadow-sm)}
.side-card h3{font-size:17px}
.rank-list{display:grid;gap:13px}
.rank-item{display:grid;grid-template-columns:27px 1fr;gap:10px;border-bottom:1px solid var(--line);padding-bottom:11px}
.rank-item:last-child{border-bottom:0;padding-bottom:0}
.rank-num{color:var(--accent);font-size:19px;font-weight:850}
.rank-item strong{display:block;font-size:13px}
.rank-item small{color:var(--muted);font-size:11px}
.note-card{background:var(--primary-soft);border-color:#d5e0fa}
.note-card p{font-size:12px;margin-bottom:0}
.timeline-section{background:#fff}
.timeline{position:relative;max-width:850px;margin:0 auto;display:grid;gap:0}
.timeline:before{content:"";position:absolute;left:24px;top:16px;bottom:16px;width:1px;background:#cdd9ee}
.timeline-item{display:grid;grid-template-columns:50px 1fr;gap:22px;position:relative;padding-bottom:25px}
.timeline-dot{
 width:49px;height:49px;border-radius:15px;background:var(--primary);
 color:#fff;display:grid;place-items:center;font-weight:850;position:relative;z-index:1;
 box-shadow:0 5px 14px rgba(37,59,120,.18)
}
.timeline-content{border:1px solid var(--line);border-radius:15px;padding:18px 20px;background:var(--warm)}
.timeline-content h3{margin-bottom:5px}
.timeline-content p{font-size:13px;margin-bottom:0}
.related-band{background:var(--blue-bg)}
.related-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
.related-main,.related-small{
 background:#fff;border:1px solid var(--line);border-radius:17px;padding:24px;box-shadow:var(--shadow-sm)
}
.related-main{display:flex;justify-content:space-between;align-items:end;gap:20px}
.related-main h3{font-size:24px;color:var(--primary)}
.related-main p,.related-small p{font-size:13px;margin-bottom:0}
.related-small{display:flex;align-items:center;gap:18px}
.related-small .strip-code{font-size:30px}
.compliance{padding:23px 0;border-top:1px solid var(--line);background:#fff}
.compliance-inner{display:flex;justify-content:space-between;gap:25px;align-items:center}
.compliance p{font-size:12px;margin:0;max-width:760px}
.narrow-cta{padding:36px 0;background:var(--primary-soft)}
.cta-row{display:flex;justify-content:space-between;align-items:center;gap:25px}
.cta-row h2{font-size:27px;margin-bottom:5px}
.cta-row p{margin-bottom:0;font-size:13px}
.site-footer{background:#fff;border-top:1px solid var(--line);padding:34px 0 23px}
.footer-top{display:flex;justify-content:space-between;gap:35px;align-items:start}
.footer-brand p{font-size:12px;margin-top:8px;max-width:350px}
.footer-links{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:13px}
.footer-links a:hover{color:var(--primary)}
.footer-bottom{
 border-top:1px solid var(--line);margin-top:27px;padding-top:17px;
 display:flex;justify-content:space-between;gap:15px;color:#8b95a7;font-size:11px
}
@media(max-width:900px){
 .nav-wrap{gap:14px}.brand{min-width:210px}
 .hero-grid{grid-template-columns:1fr;gap:35px}
 .content-layout,.related-grid{grid-template-columns:1fr}
 .side-column{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
 .container{width:min(var(--container),calc(100% - 32px))}
 .nav-wrap{min-height:72px;flex-wrap:wrap;padding:10px 0}
 .brand{min-width:0;flex:1}.brand-text{font-size:14px}
 .nav-cta{padding:9px 12px;font-size:12px}
 .tab-nav{order:3;flex-basis:100%;padding-bottom:3px}
 .hero{padding:53px 0 45px}.section{padding:60px 0}
 .hero-intro{font-size:15px}
 .index-strip{grid-template-columns:1fr}.strip-side{grid-template-columns:repeat(2,1fr)}
 .section-head{display:block}.section-head p{margin-top:12px}
 .filter-shell{align-items:flex-start}.search-box{margin-left:0;min-width:100%}
 .compliance-inner,.cta-row,.footer-top{display:block}
 .compliance .btn{margin-top:15px}.cta-row .btn{margin-top:18px}
 .footer-links{margin-top:22px}
}
@media(max-width:520px){
 h1{font-size:34px}.hero-actions .btn{width:100%}
 .container{width:calc(100% - 28px)}
 .icon-matrix{grid-template-columns:repeat(2,1fr)}
 .strip-main{padding:19px}.strip-code{font-size:34px}
 .topic-card{grid-template-columns:92px 1fr;gap:13px}.cover{height:82px}
 .card-action{grid-column:2}.side-column{grid-template-columns:1fr}
 .topic-card h3{font-size:15px}.topic-card p{font-size:11px}
 .timeline-item{grid-template-columns:40px 1fr;gap:14px}
 .timeline:before{left:19px}.timeline-dot{width:39px;height:39px;border-radius:12px;font-size:12px}
 .related-main{display:block}.related-main .btn{margin-top:17px;width:100%}
 .footer-bottom{display:block}.footer-bottom span{display:inline-block;margin-right:12px}
}