/* roulang page: index */
:root{
            --blue:#1769d2;
            --blue-deep:#123b72;
            --blue-dark:#0d294f;
            --blue-soft:#eaf3ff;
            --cyan:#dff6f4;
            --orange:#ee9b4b;
            --ink:#17263a;
            --muted:#6c7c90;
            --line:#dbe5f0;
            --paper:#ffffff;
            --bg:#f5f8fc;
            --shadow:0 14px 38px rgba(30,68,112,.09);
            --shadow-hover:0 18px 44px rgba(30,68,112,.16);
            --radius:16px;
            --radius-sm:10px;
            --container:1200px;
        }
        *,*:before,*:after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--bg);
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
            font-size:16px;
            line-height:1.75;
            overflow-x:hidden;
        }
        a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease}
        img{display:block;max-width:100%}
        button,input,select{font:inherit}
        button{cursor:pointer}
        :focus-visible{outline:3px solid rgba(23,105,210,.35);outline-offset:3px}
        .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
        .topbar{background:#fff;border-bottom:1px solid var(--line);box-shadow:0 3px 15px rgba(32,68,110,.04);position:relative;z-index:5}
        .brand-row{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:28px}
        .brand{display:flex;align-items:center;gap:13px;min-width:0}
        .brand-mark{
            width:42px;height:42px;border-radius:12px;background:var(--blue);
            color:#fff;display:grid;place-items:center;font-size:21px;font-weight:800;
            box-shadow:0 8px 18px rgba(23,105,210,.22)
        }
        .brand-copy{min-width:0}
        .brand-name{font-size:20px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
        .brand-sub{font-size:11px;color:var(--muted);letter-spacing:.12em;margin-top:-3px}
        .tool-row{display:flex;align-items:center;gap:10px}
        .tool-link{
            color:var(--muted);border:1px solid var(--line);background:#fff;
            border-radius:9px;padding:7px 13px;font-size:13px
        }
        .tool-link:hover{color:var(--blue);border-color:#a9c8ed;background:var(--blue-soft)}
        .channel-row{border-top:1px solid #eef3f8;background:#fbfdff}
        .channel-nav{display:flex;align-items:center;gap:8px;overflow-x:auto;white-space:nowrap;padding:11px 0}
        .channel-nav::-webkit-scrollbar{height:4px}
        .channel-nav::-webkit-scrollbar-thumb{background:#c6d5e8;border-radius:20px}
        .channel-link{
            display:inline-flex;align-items:center;gap:7px;padding:7px 14px;
            border:1px solid transparent;border-radius:999px;color:#617186;font-size:14px
        }
        .channel-link:hover{background:var(--blue-soft);color:var(--blue)}
        .channel-link.active{background:var(--blue);color:#fff;box-shadow:0 5px 12px rgba(23,105,210,.18)}
        .channel-dot{width:5px;height:5px;border-radius:50%;background:currentColor;opacity:.7}
        .hero{padding:58px 0 42px;background:linear-gradient(180deg,#f9fcff 0%,#f5f8fc 100%)}
        .hero-panel{
            position:relative;overflow:hidden;background:var(--blue-dark);border-radius:24px;
            padding:48px 52px;color:#fff;box-shadow:0 22px 48px rgba(13,41,79,.18)
        }
        .hero-panel:before,.hero-panel:after{content:"";position:absolute;border:1px solid rgba(163,207,255,.18);border-radius:50%}
        .hero-panel:before{width:430px;height:430px;right:-150px;top:-220px}
        .hero-panel:after{width:300px;height:300px;right:55px;bottom:-220px}
        .hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:54px;align-items:center;position:relative;z-index:1}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:#8fc4ff;font-size:12px;font-weight:700;letter-spacing:.12em}
        .eyebrow:before{content:"";width:22px;height:2px;background:var(--orange)}
        .hero h1{font-size:clamp(34px,5vw,60px);line-height:1.15;letter-spacing:-.06em;margin:18px 0 20px;color:#fff;font-weight:800}
        .hero-desc{max-width:650px;color:#c7d9f1;font-size:17px;line-height:1.85;margin:0 0 27px}
        .button-group{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
        .btn{
            display:inline-flex;align-items:center;justify-content:center;min-height:44px;
            padding:10px 18px;border-radius:9px;font-size:14px;font-weight:700;border:1px solid transparent
        }
        .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(23,105,210,.2)}
        .btn-primary:hover{background:#0f57b5;color:#fff;transform:translateY(-2px);box-shadow:0 12px 22px rgba(23,105,210,.28)}
        .btn-light{background:#fff;color:var(--blue);border-color:#fff}
        .btn-light:hover{background:#e9f3ff;color:var(--blue);transform:translateY(-2px)}
        .btn-ghost{background:transparent;color:#dcecff;border-color:rgba(220,236,255,.38)}
        .btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff}
        .hero-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:28px;color:#9fb9d7;font-size:12px}
        .hero-meta strong{display:block;color:#fff;font-size:22px;line-height:1.2;font-weight:750}
        .hero-meta span{display:block;margin-top:3px}
        .index-board{background:rgba(255,255,255,.08);border:1px solid rgba(195,221,249,.18);border-radius:16px;padding:21px}
        .board-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(220,237,255,.14);padding-bottom:15px;margin-bottom:4px}
        .board-title{font-weight:700;font-size:14px}
        .board-status{font-size:11px;color:#9cd1c7;display:flex;align-items:center;gap:5px}
        .board-status:before{content:"";width:6px;height:6px;background:#65d6bb;border-radius:50%}
        .board-row{display:grid;grid-template-columns:32px 1fr auto;gap:12px;align-items:center;padding:15px 0;border-bottom:1px solid rgba(220,237,255,.11)}
        .board-row:last-child{border-bottom:0;padding-bottom:3px}
        .board-no{font-family:monospace;color:#7fa6d3;font-size:12px}
        .board-info strong{display:block;font-size:14px;color:#fff;font-weight:650}
        .board-info span{display:block;color:#9fb9d7;font-size:11px;margin-top:2px}
        .board-tag{font-size:11px;color:#b8ddff;background:rgba(87,164,235,.16);padding:4px 7px;border-radius:5px}
        .section{padding:78px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}
        .section-kicker{font-size:12px;color:var(--blue);font-weight:800;letter-spacing:.16em;margin-bottom:8px}
        h2{font-size:clamp(26px,3vw,38px);line-height:1.25;letter-spacing:-.045em;margin:0;font-weight:800}
        .section-intro{max-width:510px;color:var(--muted);font-size:15px;margin:0}
        .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
        .metric-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);position:relative;overflow:hidden}
        .metric-card:after{content:"";position:absolute;bottom:0;left:0;width:100%;height:3px;background:var(--metric,#67a9ed)}
        .metric-label{color:var(--muted);font-size:13px}
        .metric-number{font-size:32px;line-height:1.2;font-weight:800;letter-spacing:-.05em;margin:10px 0 5px}
        .metric-note{color:#8492a2;font-size:12px}
        .metric-line{height:5px;background:#edf3f9;border-radius:5px;margin-top:17px;overflow:hidden}
        .metric-line i{display:block;height:100%;width:var(--progress,68%);background:var(--metric,#67a9ed);border-radius:inherit}
        .matrix{display:grid;grid-template-columns:1.2fr .8fr .8fr;grid-template-rows:auto auto;gap:16px}
        .matrix-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow);transition:.25s;min-height:188px}
        .matrix-card:hover,.compare-card:hover,.preview-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#a9c8ed}
        .matrix-main{grid-row:span 2;background:var(--blue-soft);border-color:#c8def6;min-height:392px}
        .matrix-card:nth-child(3){background:#fff8ee}
        .matrix-card:nth-child(4){background:#effaf8}
        .matrix-card:nth-child(5){min-height:170px}
        .card-no{font-family:monospace;font-size:12px;color:var(--blue);font-weight:700}
        .matrix-card h3{font-size:20px;margin:20px 0 8px;letter-spacing:-.03em}
        .matrix-card p{font-size:14px;color:var(--muted);line-height:1.7;margin:0 0 18px}
        .matrix-card .btn{min-height:36px;padding:7px 13px;font-size:12px}
        .tag{display:inline-flex;align-items:center;border-radius:5px;background:#edf3f9;color:#54708e;padding:4px 8px;font-size:11px;margin:0 5px 5px 0}
        .tag.blue{background:#dcecff;color:#1769d2}.tag.green{background:#dcf4ef;color:#267d6d}.tag.warm{background:#fff0d9;color:#a56a25}
        .comparison{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .compare-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:.25s}
        .compare-card.accent{background:#f0f7ff;border-color:#bbd7f6}
        .compare-top{display:flex;justify-content:space-between;align-items:start;gap:15px;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:20px}
        .compare-top h3{font-size:22px;margin:0 0 4px;letter-spacing:-.03em}
        .compare-top p{margin:0;color:var(--muted);font-size:13px}
        .compare-code{font-family:monospace;color:#8ba0b7;font-size:12px}
        .compare-list{list-style:none;margin:0;padding:0}
        .compare-list li{display:flex;justify-content:space-between;gap:18px;padding:11px 0;color:#5e7085;font-size:13px;border-bottom:1px dashed #e1e8f0}
        .compare-list li:last-child{border:0}.compare-list strong{color:var(--ink)}
        .preview-layout{display:grid;grid-template-columns:1fr 330px;gap:22px}
        .preview-list{display:flex;flex-direction:column;gap:12px}
        .preview-item{display:grid;grid-template-columns:118px 1fr auto;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px;box-shadow:0 8px 23px rgba(30,68,112,.05);transition:.25s}
        .cover{height:84px;border-radius:8px;position:relative;overflow:hidden;background:linear-gradient(135deg,#8bb8e8,#193d74)}
        .cover:after{content:"";position:absolute;width:70px;height:130px;right:20px;top:-22px;background:rgba(255,255,255,.18);transform:rotate(24deg)}
        .cover.c2{background:linear-gradient(135deg,#a9d9d1,#346c91)}.cover.c3{background:linear-gradient(135deg,#e9b579,#70517c)}.cover.c4{background:linear-gradient(135deg,#a4a9e8,#314f9a)}
        .cover-label{position:absolute;z-index:1;left:10px;bottom:8px;color:#fff;font-family:monospace;font-size:11px;letter-spacing:.08em}
        .preview-item h3{font-size:16px;margin:0 0 5px;line-height:1.4}
        .preview-item p{font-size:12px;color:var(--muted);margin:0}
        .preview-time{font-size:11px;color:#8292a5;white-space:nowrap}
        .info-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:var(--shadow)}
        .info-panel h3{font-size:20px;margin:0 0 10px}.info-panel p{color:var(--muted);font-size:13px;margin:0 0 20px}
        .keyword-list{display:flex;flex-wrap:wrap;gap:7px}.keyword-list a{font-size:12px;padding:7px 10px;border-radius:6px;background:#f0f5fa;color:#55718f}.keyword-list a:hover{background:var(--blue-soft);color:var(--blue)}
        .faq-wrap{display:grid;grid-template-columns:.72fr 1.28fr;gap:60px;align-items:start}
        .faq-aside{position:sticky;top:20px}.faq-aside p{color:var(--muted);font-size:15px;margin:15px 0 22px}.age-note{border-left:3px solid var(--orange);padding:10px 0 10px 14px;color:#718092;font-size:13px}
        .accordion{background:transparent;margin:0}.accordion-item{border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:10px;overflow:hidden;box-shadow:0 5px 16px rgba(30,68,112,.04)}
        .accordion-title{font-size:15px;font-weight:700;color:var(--ink);padding:17px 48px 17px 20px;border:0;background:#fff}
        .accordion-title:hover,.accordion-item.is-active .accordion-title{background:var(--blue-soft);color:var(--blue)}
        .accordion-content{border:0;padding:0 20px 18px;color:#68798d;font-size:14px;line-height:1.8;background:#fafdff}
        .cta-section{padding:78px 0 96px}.cta-box{background:#eaf4ff;border:1px solid #c6def7;border-radius:22px;padding:38px 42px;display:grid;grid-template-columns:1fr 1.2fr;gap:45px;align-items:center}
        .cta-box p{color:#60758e;margin:12px 0 0;font-size:14px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.form-field label{font-size:12px;font-weight:700;color:#50677f;display:block;margin-bottom:5px}
        input,select{width:100%;height:44px;border:1px solid #c9d9e9;background:#fff;border-radius:8px;padding:0 13px;color:var(--ink);font-size:14px}
        input::placeholder{color:#a3afbd}input:hover,select:hover{border-color:#9dbde0}input:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(23,105,210,.1);outline:0}
        .form-full{grid-column:1/-1}.form-tip{grid-column:1/-1;color:#8091a4;font-size:11px;line-height:1.6}.form-submit{grid-column:1/-1;display:flex;align-items:center;gap:15px}.success{font-size:12px;color:#267d6d;display:none}
        footer{background:#edf3f8;border-top:1px solid var(--line);padding:42px 0 25px}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:45px;padding-bottom:30px;border-bottom:1px solid #d8e3ee}
        footer .brand-name{font-size:17px}footer p{color:#728398;font-size:13px;margin:12px 0 0;max-width:360px}.footer-title{font-size:13px;font-weight:800;margin-bottom:12px}.footer-links{display:flex;flex-wrap:wrap;gap:8px 18px}.footer-links a{font-size:13px;color:#64788e}.footer-links a:hover{color:var(--blue)}
        .footer-bottom{display:flex;justify-content:space-between;gap:20px;color:#8797a8;font-size:12px;padding-top:20px}.age-gate{position:fixed;inset:0;background:rgba(13,41,79,.62);z-index:20;display:grid;place-items:center;padding:20px}.gate-card{width:min(470px,100%);background:#fff;border-radius:18px;padding:32px;box-shadow:0 24px 70px rgba(4,22,48,.28);text-align:center}.gate-card h2{font-size:26px}.gate-card p{color:var(--muted);font-size:14px;margin:12px 0 22px}.gate-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.gate-card .btn{min-width:125px}
        @media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:30px}.metrics{grid-template-columns:repeat(2,1fr)}.matrix{grid-template-columns:1fr 1fr}.matrix-main{grid-row:auto;grid-column:span 2;min-height:0}.preview-layout{grid-template-columns:1fr}.faq-wrap{gap:30px}.faq-aside{position:static}.cta-box{grid-template-columns:1fr;gap:25px}.footer-grid{grid-template-columns:1fr 1fr}}
        @media(max-width:640px){.container{width:min(100% - 28px,var(--container))}.brand-row{min-height:72px;gap:12px}.brand-mark{width:36px;height:36px;font-size:17px}.brand-name{font-size:16px}.brand-sub{font-size:9px}.tool-row{gap:5px}.tool-link{padding:6px 8px;font-size:11px}.tool-link:nth-child(2){display:none}.hero{padding:25px 0 30px}.hero-panel{padding:31px 22px;border-radius:18px}.hero h1{font-size:34px}.hero-desc{font-size:15px;line-height:1.75}.hero-meta{gap:13px}.hero-meta strong{font-size:19px}.section{padding:54px 0}.section-head{display:block;margin-bottom:22px}.section-intro{margin-top:10px}.metrics{grid-template-columns:1fr 1fr;gap:10px}.metric-card{padding:16px}.metric-number{font-size:26px}.matrix{display:flex;flex-direction:column}.matrix-main{min-height:245px}.matrix-card{min-height:0!important;padding:20px}.comparison{grid-template-columns:1fr}.preview-item{grid-template-columns:84px 1fr;gap:12px}.preview-item .btn{grid-column:2;justify-self:start}.cover{height:70px}.preview-time{grid-column:2}.faq-wrap{grid-template-columns:1fr}.faq-aside{display:block}.cta-section{padding:54px 0 65px}.cta-box{padding:25px 18px;border-radius:16px}.form-grid{grid-template-columns:1fr}.form-full,.form-tip,.form-submit{grid-column:auto}.footer-grid{grid-template-columns:1fr;gap:25px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}.board-row{grid-template-columns:26px 1fr auto}.button-group .btn{flex:1}.gate-card{padding:25px 20px}}

/* roulang page: category2 */
:root{
 --blue:#1769d2;--blue-deep:#123b72;--blue-dark:#0d294f;--blue-soft:#eaf3ff;
 --cyan:#dff6f4;--orange:#ee9b4b;--ink:#17263a;--muted:#6c7c90;
 --line:#dbe5f0;--paper:#fff;--bg:#f5f8fc;
 --shadow:0 14px 38px rgba(30,68,112,.09);--shadow-hover:0 18px 44px rgba(30,68,112,.16);
 --radius:16px;--radius-sm:10px;--container:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease}
img{display:block;max-width:100%}
button,input,select{font:inherit}
button{cursor:pointer}
.container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
.topbar{background:#fff;border-bottom:1px solid var(--line);box-shadow:0 3px 15px rgba(32,68,110,.04);position:relative;z-index:5}
.brand-row{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:flex;align-items:center;gap:13px;min-width:0}
.brand-mark{width:42px;height:42px;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:21px;font-weight:800;box-shadow:0 8px 18px rgba(23,105,210,.22)}
.brand-copy{min-width:0}
.brand-name{font-size:20px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
.brand-sub{display:block;font-size:11px;color:var(--muted);letter-spacing:.12em;margin-top:-3px}
.tool-row{display:flex;align-items:center;gap:10px}
.tool-link{font-size:13px;color:var(--muted);padding:7px 11px;border:1px solid transparent;border-radius:7px}
.tool-link:hover{color:var(--blue);background:var(--blue-soft);border-color:#cfe1f6}
.channel-row{border-top:1px solid #eef3f8;background:#fbfdff}
.channel-nav{display:flex;align-items:center;gap:8px;overflow-x:auto;white-space:nowrap;padding:11px 0}
.channel-nav::-webkit-scrollbar{height:4px}
.channel-nav::-webkit-scrollbar-thumb{background:#c6d5e8;border-radius:20px}
.channel-link{display:inline-flex;align-items:center;gap:7px;padding:8px 14px;border:1px solid #e1eaf3;border-radius:8px;color:#58708a;font-size:13px}
.channel-link:hover{color:var(--blue);border-color:#aac9ec;background:#f1f7ff}
.channel-link.active{color:#fff;background:var(--blue);border-color:var(--blue);box-shadow:0 7px 15px rgba(23,105,210,.18)}
.channel-dot{width:6px;height:6px;border-radius:50%;background:currentColor}
.page-intro{padding:48px 0 30px;background:linear-gradient(180deg,#f9fcff,#f5f8fc)}
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:12px;color:var(--muted);margin-bottom:19px}
.breadcrumb a:hover{color:var(--blue)}
.intro-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:42px;align-items:end}
.eyebrow,.section-kicker{font-size:12px;color:var(--blue);font-weight:800;letter-spacing:.15em}
.page-intro h1{font-size:clamp(32px,5vw,56px);line-height:1.2;letter-spacing:-.06em;margin:13px 0 16px;color:var(--blue-dark)}
.lead{max-width:690px;margin:0;color:var(--muted);font-size:16px}
.summary-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:23px;box-shadow:var(--shadow)}
.summary-panel strong{display:block;font-size:28px;color:var(--blue-dark);line-height:1.2}
.summary-panel span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
.summary-line{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px solid #edf2f7;font-size:13px}
.summary-line:last-child{border-bottom:0;padding-bottom:0}
.summary-line b{color:var(--blue)}
.section{padding:62px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:25px}
.section-head h2{font-size:30px;line-height:1.25;margin:8px 0 0;letter-spacing:-.04em;color:var(--blue-dark)}
.section-intro{max-width:520px;color:var(--muted);font-size:14px;margin:0}
.filter-bar{display:flex;flex-wrap:wrap;gap:9px;padding:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:28px}
.filter-label{font-size:12px;color:var(--muted);padding:8px 5px 8px 2px}
.filter-chip{border:1px solid #dce7f2;background:#f8fbfe;color:#55708d;border-radius:7px;padding:7px 12px;font-size:12px}
.filter-chip:hover,.filter-chip.active{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}
.index-layout{display:grid;grid-template-columns:1fr 310px;gap:25px;align-items:start}
.index-list{display:grid;gap:14px}
.index-item{display:grid;grid-template-columns:72px minmax(0,1fr) auto;gap:19px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:21px 23px;box-shadow:var(--shadow);transition:.25s}
.index-item:hover{transform:translateY(-3px);border-color:#a9c8ed;box-shadow:var(--shadow-hover)}
.index-number{font-family:monospace;color:var(--blue);font-size:25px;font-weight:700;letter-spacing:-.08em}
.index-number small{display:block;color:#9aabba;font-size:10px;letter-spacing:.1em;margin-top:2px}
.index-item h3{font-size:19px;margin:0 0 6px;color:var(--blue-dark);letter-spacing:-.03em}
.index-item p{font-size:13px;color:var(--muted);margin:0 0 8px;line-height:1.65}
.tag{display:inline-flex;align-items:center;border-radius:5px;background:#edf3f9;color:#54708e;padding:4px 8px;font-size:11px;margin:0 5px 4px 0}
.tag.blue{background:#dcecff;color:#1769d2}.tag.green{background:#dcf4ef;color:#267d6d}.tag.warm{background:#fff0d9;color:#a56a25}
.item-meta{text-align:right;min-width:94px;color:var(--muted);font-size:11px}
.item-meta b{display:block;color:#267d6d;font-size:12px;margin-bottom:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:8px 15px;border-radius:8px;font-size:13px;font-weight:700;border:1px solid transparent}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(23,105,210,.2)}
.btn-primary:hover{background:#0f57b5;color:#fff;transform:translateY(-2px)}
.btn-secondary{background:#fff;color:var(--blue);border-color:#b8d1ee}
.btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue);transform:translateY(-2px)}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:23px;box-shadow:var(--shadow);margin-bottom:16px}
.side-card h3{font-size:17px;margin:0 0 14px;color:var(--blue-dark)}
.keyword-list{display:flex;flex-wrap:wrap;gap:8px}
.keyword{font-size:12px;color:#54708e;background:#f2f6fa;border:1px solid #e1e9f1;padding:6px 9px;border-radius:6px}
.keyword:hover{color:var(--blue);border-color:#b7d2ef}
.progress-row{margin:16px 0}
.progress-row header{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:6px}
.progress{height:6px;background:#edf2f7;border-radius:5px;overflow:hidden}
.progress span{display:block;height:100%;background:var(--blue);border-radius:inherit}
.age-note{padding:17px;background:#fff8ee;border:1px solid #f2d8b4;border-radius:var(--radius-sm);color:#80633e;font-size:13px}
.pagination{margin:32px 0 0}
.pagination li a{border-radius:6px;color:#58708a}
.pagination li.current{border-radius:6px;background:var(--blue);padding:0 11px}
.update-band{background:var(--blue-soft);border-top:1px solid #d5e7fa;border-bottom:1px solid #d5e7fa}
.update-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:35px;align-items:center}
.update-band h2{font-size:29px;line-height:1.3;color:var(--blue-dark);margin:0 0 10px}
.update-band p{color:var(--muted);font-size:14px;margin:0}
.feedback-form{display:grid;grid-template-columns:1fr 1fr auto;gap:10px}
.feedback-form input,.feedback-form select{height:44px;border:1px solid #cdddec;border-radius:8px;box-shadow:none;color:var(--ink);background:#fff}
.feedback-form input:focus,.feedback-form select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(23,105,210,.13)}
.form-note{font-size:11px;color:var(--muted);margin-top:9px}
footer{padding:58px 0 22px;background:#eef4fa;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.4fr .7fr .7fr;gap:45px}
footer p{font-size:13px;color:var(--muted);max-width:430px;margin:17px 0 0}
.footer-title{font-size:13px;font-weight:800;color:var(--blue-dark);margin-bottom:12px}
.footer-links{display:grid;gap:7px;font-size:13px;color:var(--muted)}
.footer-links a:hover{color:var(--blue);padding-left:3px}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #d8e3ef;margin-top:38px;padding-top:18px;color:#8292a3;font-size:11px}
:focus-visible{outline:3px solid rgba(23,105,210,.35);outline-offset:3px}
@media(max-width:900px){
 .intro-grid,.index-layout,.update-grid{grid-template-columns:1fr}
 .summary-panel{max-width:520px}
 .feedback-form{grid-template-columns:1fr 1fr}
 .feedback-form .btn{grid-column:1/-1}
}
@media(max-width:640px){
 .container{width:min(var(--container),calc(100% - 28px))}
 .brand-row{min-height:72px;align-items:flex-start;padding:15px 0;flex-direction:column;gap:9px}
 .brand-name{font-size:17px}.brand-mark{width:37px;height:37px;font-size:18px}
 .tool-row{width:100%;overflow-x:auto}.tool-link{font-size:12px;padding:5px 8px}
 .page-intro{padding-top:32px}.page-intro h1{font-size:34px}
 .section{padding:45px 0}.section-head{display:block}.section-intro{margin-top:12px}
 .filter-bar{gap:6px}.filter-label{width:100%;padding-bottom:0}
 .index-item{grid-template-columns:45px 1fr;gap:12px;padding:17px}
 .index-number{font-size:20px}.item-meta{grid-column:2;text-align:left;display:flex;align-items:center;gap:13px}
 .item-meta b{margin:0}.item-meta .btn{margin-left:auto}
 .update-band h2{font-size:25px}.feedback-form{grid-template-columns:1fr}
 .feedback-form .btn{grid-column:auto}
 .footer-grid{grid-template-columns:1fr;gap:26px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}
}

/* roulang page: category1 */
:root{
      --blue:#1769d2;
      --blue-deep:#123b72;
      --blue-dark:#0d294f;
      --blue-soft:#eaf3ff;
      --cyan:#dff6f4;
      --orange:#ee9b4b;
      --ink:#17263a;
      --muted:#6c7c90;
      --line:#dbe5f0;
      --paper:#fff;
      --bg:#f5f8fc;
      --shadow:0 14px 38px rgba(30,68,112,.09);
      --shadow-hover:0 18px 44px rgba(30,68,112,.16);
      --radius:16px;
      --radius-sm:10px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;color:var(--ink);background:var(--bg);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      font-size:16px;line-height:1.75;overflow-x:hidden
    }
    a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease}
    img{display:block;max-width:100%}
    button,input,select{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .topbar{background:#fff;border-bottom:1px solid var(--line);box-shadow:0 3px 15px rgba(32,68,110,.04);position:relative;z-index:5}
    .brand-row{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:flex;align-items:center;gap:13px;min-width:0}
    .brand-mark{width:42px;height:42px;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:21px;font-weight:800;box-shadow:0 8px 18px rgba(23,105,210,.22)}
    .brand-copy{min-width:0}
    .brand-name{font-size:20px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
    .brand-sub{display:block;font-size:11px;color:var(--muted);letter-spacing:.12em;margin-top:-3px}
    .tool-row{display:flex;align-items:center;gap:10px}
    .tool-link{font-size:13px;color:var(--muted);border:1px solid var(--line);border-radius:8px;padding:7px 12px;background:#fff}
    .tool-link:hover{color:var(--blue);border-color:#a9c8ed;background:var(--blue-soft)}
    .channel-row{border-top:1px solid #eef3f8;background:#fbfdff}
    .channel-nav{display:flex;align-items:center;gap:8px;overflow-x:auto;white-space:nowrap;padding:11px 0}
    .channel-nav::-webkit-scrollbar{height:4px}
    .channel-nav::-webkit-scrollbar-thumb{background:#c6d5e8;border-radius:20px}
    .channel-link{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border:1px solid transparent;border-radius:8px;color:#52677e;font-size:14px}
    .channel-link:hover{color:var(--blue);background:#edf5ff}
    .channel-link.active{background:var(--blue);color:#fff;box-shadow:0 6px 14px rgba(23,105,210,.18)}
    .channel-dot{width:6px;height:6px;border-radius:50%;background:currentColor}
    .page-hero{padding:54px 0 42px;background:linear-gradient(180deg,#f9fcff 0%,#f5f8fc 100%)}
    .crumbs{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin-bottom:22px}
    .crumbs a:hover{color:var(--blue)}
    .crumbs span{color:#b0bdcb}
    .hero-title-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:end}
    .eyebrow,.section-kicker{font-size:12px;color:var(--blue);font-weight:800;letter-spacing:.14em}
    h1{font-size:clamp(34px,5vw,58px);line-height:1.16;letter-spacing:-.06em;margin:14px 0 18px;color:var(--blue-dark);font-weight:800}
    .hero-intro{max-width:680px;color:var(--muted);font-size:17px;margin:0}
    .summary-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:23px}
    .summary-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:15px;margin-bottom:14px}
    .summary-top strong{font-size:15px}
    .status{font-size:11px;color:#267d6d;background:#dcf4ef;border-radius:5px;padding:5px 8px}
    .summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .summary-item{padding:8px 0}
    .summary-item b{display:block;color:var(--blue-dark);font-size:24px;line-height:1.2}
    .summary-item span{font-size:12px;color:var(--muted)}
    .content-section{padding:68px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
    .section-head h2{font-size:30px;line-height:1.25;letter-spacing:-.04em;margin:8px 0 0;color:var(--blue-dark)}
    .section-intro{max-width:530px;color:var(--muted);font-size:14px;margin:0}
    .browser-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:26px;align-items:start}
    .filter-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:23px;box-shadow:var(--shadow);position:sticky;top:20px}
    .filter-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
    .filter-title strong{font-size:17px}
    .filter-title span{font-family:monospace;font-size:11px;color:var(--blue)}
    .filter-group{border-top:1px solid var(--line);padding:17px 0 3px}
    .filter-group:first-of-type{border-top:0;padding-top:0}
    .filter-label{display:block;font-size:13px;font-weight:700;margin-bottom:9px}
    .filter-option{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px;margin:8px 0}
    .filter-option input{accent-color:var(--blue)}
    select,.search-input{width:100%;border:1px solid var(--line);border-radius:8px;background:#fbfdff;color:var(--ink);padding:9px 11px;outline:none}
    select:focus,.search-input:focus,input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(23,105,210,.12)}
    .filter-actions{display:flex;gap:8px;margin-top:18px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:9px 16px;border-radius:9px;font-size:13px;font-weight:700;border:1px solid transparent}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(23,105,210,.2)}
    .btn-primary:hover{background:#0f57b5;color:#fff;transform:translateY(-2px);box-shadow:0 12px 22px rgba(23,105,210,.28)}
    .btn-outline{background:#fff;color:var(--blue);border-color:#a9c8ed}
    .btn-outline:hover{background:var(--blue-soft);border-color:var(--blue)}
    .result-toolbar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:15px}
    .result-toolbar strong{font-size:15px}
    .toolbar-note{font-size:12px;color:var(--muted)}
    .result-list{display:grid;gap:14px}
    .result-card{display:grid;grid-template-columns:150px minmax(0,1fr) auto;gap:20px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:15px;box-shadow:var(--shadow);transition:.25s}
    .result-card:hover{transform:translateY(-3px);border-color:#a9c8ed;box-shadow:var(--shadow-hover)}
    .cover{height:112px;border-radius:11px;position:relative;overflow:hidden;background:linear-gradient(135deg,#dcecff,#8fb9e9 55%,#dff6f4)}
    .cover:before{content:"";position:absolute;width:90px;height:145px;left:33px;top:-18px;border-radius:50% 50% 20% 20%;background:rgba(18,59,114,.24);transform:rotate(16deg)}
    .cover:after{content:"";position:absolute;inset:12px;border:1px solid rgba(255,255,255,.65);border-radius:8px}
    .cover.warm{background:linear-gradient(135deg,#fff0d9,#efbb82 55%,#eaf3ff)}
    .cover.green{background:linear-gradient(135deg,#dcf4ef,#8ecfc1 55%,#eaf3ff)}
    .cover-label{position:absolute;z-index:1;left:11px;bottom:9px;color:#fff;background:rgba(13,41,79,.72);font-size:11px;padding:3px 7px;border-radius:5px}
    .result-card h3{font-size:19px;line-height:1.35;margin:0 0 8px;color:var(--blue-dark)}
    .result-card p{font-size:13px;color:var(--muted);margin:7px 0 8px;line-height:1.6}
    .tag{display:inline-flex;align-items:center;border-radius:5px;background:#edf3f9;color:#54708e;padding:4px 8px;font-size:11px;margin:0 5px 4px 0}
    .tag.blue{background:#dcecff;color:var(--blue)}
    .tag.green{background:#dcf4ef;color:#267d6d}
    .tag.warm{background:#fff0d9;color:#a56a25}
    .result-meta{color:#8998a9;font-size:11px}
    .result-card .btn{white-space:nowrap}
    .note-strip{margin-top:20px;background:var(--blue-soft);border:1px solid #c8def6;border-radius:var(--radius);padding:17px 20px;color:#4e6c8b;font-size:13px}
    .topic-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:0}
    .topic-box{padding:34px 34px 34px 0}
    .topic-box+ .topic-box{border-left:1px solid var(--line);padding:34px 0 34px 34px}
    .topic-box h3{font-size:22px;margin:8px 0;color:var(--blue-dark)}
    .topic-box p{color:var(--muted);font-size:14px;margin:0 0 15px}
    .faq-wrap{display:grid;grid-template-columns:.7fr 1.3fr;gap:45px;align-items:start}
    .faq-wrap h2{font-size:30px;line-height:1.25;margin:8px 0 14px;color:var(--blue-dark)}
    .accordion{margin:0;border:0;background:transparent}
    .accordion-item{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-bottom:10px;background:#fff}
    .accordion-title{color:var(--ink);font-weight:700;font-size:14px;border:0;padding:17px 45px 17px 18px;background:#fff}
    .accordion-title:hover{color:var(--blue);background:var(--blue-soft)}
    .accordion-content{border:0;border-top:1px solid var(--line);background:#fafdff;color:var(--muted);font-size:13px;padding:15px 18px}
    .accordion-item.is-active{border-color:#9fc4ed;box-shadow:0 8px 20px rgba(30,68,112,.07)}
    .cta-panel{background:var(--blue-soft);border:1px solid #c8def6;border-radius:22px;padding:34px 38px;display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
    .cta-panel h2{font-size:27px;line-height:1.3;margin:7px 0 10px;color:var(--blue-dark)}
    .cta-panel p{color:var(--muted);font-size:14px;margin:0}
    .feedback-form{background:#fff;border:1px solid #c8def6;border-radius:14px;padding:20px}
    .feedback-form label{display:block;font-size:12px;font-weight:700;margin-bottom:6px}
    .form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .feedback-form input,.feedback-form select{margin-bottom:12px}
    .form-hint{font-size:11px;color:var(--muted);margin:5px 0 12px}
    footer{background:#eef3f8;border-top:1px solid var(--line);padding:55px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr .7fr .7fr;gap:50px}
    footer .brand-name{font-size:17px}
    footer p{max-width:390px;color:var(--muted);font-size:13px;margin:17px 0 0}
    .footer-title{font-size:13px;font-weight:800;color:var(--blue-dark);margin-bottom:12px}
    .footer-links{display:grid;gap:8px;color:var(--muted);font-size:13px}
    .footer-links a:hover{color:var(--blue)}
    .footer-bottom{border-top:1px solid var(--line);margin-top:35px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;color:#8493a3;font-size:11px}
    .age-note{font-size:12px;color:#667b91;background:#fff8ee;border-left:3px solid var(--orange);padding:12px 15px;border-radius:7px;margin-top:18px}
    @media (max-width:1024px){
      .hero-title-grid{grid-template-columns:1fr}
      .browser-layout{grid-template-columns:240px minmax(0,1fr)}
      .result-card{grid-template-columns:125px minmax(0,1fr)}
      .result-card .btn{grid-column:2;justify-self:start}
      .cta-panel{grid-template-columns:1fr}
    }
    @media (max-width:768px){
      .container{width:min(var(--container),calc(100% - 28px))}
      .brand-row{min-height:72px;gap:12px}
      .brand-name{font-size:16px}
      .brand-mark{width:38px;height:38px;font-size:18px}
      .tool-row{gap:5px}
      .tool-link{font-size:11px;padding:6px 8px}
      .tool-link:nth-child(1){display:none}
      .page-hero{padding:38px 0 28px}
      h1{font-size:37px}
      .content-section{padding:50px 0}
      .browser-layout{grid-template-columns:1fr}
      .filter-panel{position:static}
      .topic-grid,.faq-wrap,.footer-grid{grid-template-columns:1fr}
      .topic-box,.topic-box+.topic-box{padding:27px 0}
      .topic-box+.topic-box{border-left:0;border-top:1px solid var(--line)}
      .footer-grid{gap:28px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:5px}
    }
    @media (max-width:520px){
      .brand-sub{font-size:9px;letter-spacing:.05em}
      .tool-link:nth-child(2){display:none}
      .summary-grid{grid-template-columns:repeat(3,1fr);gap:6px}
      .summary-item b{font-size:20px}
      .result-card{grid-template-columns:1fr;gap:13px}
      .cover{height:150px}
      .result-card .btn{grid-column:auto;width:100%}
      .section-head{display:block}
      .section-intro{margin-top:12px}
      .form-row{grid-template-columns:1fr}
      .cta-panel{padding:25px 20px}
      .filter-actions .btn{flex:1}
    }
    :focus-visible{outline:3px solid rgba(23,105,210,.35);outline-offset:3px}