/* roulang page: index */
:root{
            --ink:#17243b;
            --muted:#66748b;
            --blue:#3568b8;
            --blue-deep:#214b91;
            --blue-soft:#eaf2ff;
            --cream:#fbfcfe;
            --paper:#ffffff;
            --line:#dce5f1;
            --warm:#f2a65a;
            --success:#2e8b78;
            --radius:20px;
            --shadow:0 16px 42px rgba(38,73,126,.10);
            --shadow-sm:0 8px 24px rgba(38,73,126,.08);
            --container:1200px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--cream);
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
            font-size:16px;
            line-height:1.75;
        }
        a{color:inherit;text-decoration:none}
        a:hover{color:var(--blue)}
        button,input,select,textarea{font:inherit}
        img{max-width:100%;display:block}
        .container{max-width:var(--container);margin:0 auto;padding:0 24px}
        .site-header{
            position:sticky;top:0;z-index:20;
            background:rgba(251,252,254,.94);
            border-bottom:1px solid rgba(220,229,241,.9);
            backdrop-filter:blur(14px);
        }
        .nav-wrap{min-height:78px;display:flex;align-items:center;gap:26px}
        .brand{display:flex;align-items:center;gap:11px;white-space:nowrap;font-weight:800;font-size:19px;letter-spacing:-.5px}
        .brand-mark{
            width:34px;height:34px;border-radius:11px;background:var(--blue);
            color:#fff;display:grid;place-items:center;font-size:14px;
            box-shadow:0 6px 14px rgba(53,104,184,.25)
        }
        .nav-scroll{display:flex;align-items:center;gap:7px;flex:1;min-width:0}
        .nav-link{
            padding:8px 15px;border:1px solid transparent;border-radius:999px;
            color:var(--muted);font-size:14px;transition:.22s ease;white-space:nowrap
        }
        .nav-link:hover{color:var(--blue);background:var(--blue-soft);border-color:#cbdcf8}
        .nav-link.active{color:var(--blue-deep);background:#fff;border-color:#bcd0ee;box-shadow:0 4px 12px rgba(53,104,184,.08)}
        .nav-cta,.btn-primary{
            border:0;background:var(--blue);color:#fff;border-radius:12px;
            padding:11px 18px;font-weight:700;white-space:nowrap;
            transition:.22s ease;box-shadow:0 8px 18px rgba(53,104,184,.2)
        }
        .nav-cta:hover,.btn-primary:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(53,104,184,.27)}
        .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:7px 11px;color:var(--ink)}
        .hero{
            position:relative;overflow:hidden;
            padding:88px 0 70px;
            background:#edf5ff;
            border-bottom:1px solid #dae7f7;
        }
        .hero:before,.hero:after{content:"";position:absolute;border:1px solid #c8dcf6;border-radius:50%;pointer-events:none}
        .hero:before{width:430px;height:430px;right:-120px;top:-150px}
        .hero:after{width:250px;height:250px;left:-110px;bottom:-150px}
        .hero-inner{position:relative;z-index:1}
        .eyebrow,.section-kicker{
            display:inline-flex;align-items:center;gap:8px;color:var(--blue-deep);
            font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase
        }
        .eyebrow:before,.section-kicker:before{content:"";width:24px;height:2px;background:var(--warm)}
        h1,h2,h3{font-weight:800;letter-spacing:-.04em;line-height:1.2;margin:0}
        h1{font-size:clamp(38px,5vw,64px);max-width:720px;margin:18px 0 22px}
        h1 em{font-style:normal;color:var(--blue)}
        .hero-copy{max-width:700px;color:#55657d;font-size:18px;margin:0 0 29px}
        .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
        .btn-secondary{
            background:#fff;border:1px solid #bfd2ec;color:var(--blue-deep);
            border-radius:12px;padding:10px 18px;font-weight:700;transition:.22s ease
        }
        .btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-deep);transform:translateY(-2px)}
        .hero-strip{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}
        .hero-point{background:rgba(255,255,255,.75);border:1px solid #d5e3f5;border-radius:12px;padding:10px 14px;font-size:13px;color:#52637b}
        .hero-point strong{color:var(--ink);margin-right:5px}
        .hero-board{
            margin-top:58px;background:#fff;border:1px solid #d5e2f2;border-radius:22px;
            box-shadow:var(--shadow);padding:22px;max-width:980px
        }
        .board-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:15px;margin-bottom:18px}
        .board-title{font-weight:800}.board-note{font-size:12px;color:var(--muted)}
        .board-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:12px}
        .board-cell{padding:16px;border-radius:14px;background:#f7faff;border:1px solid #e3edf9}
        .board-cell:first-child{background:var(--blue);color:#fff;border-color:var(--blue)}
        .board-number{font-size:27px;font-weight:800;line-height:1.2}.board-label{font-size:13px;margin-top:5px;opacity:.78}
        section{padding:88px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:32px}
        .section-head h2{font-size:clamp(28px,3.3vw,42px);margin-top:13px}
        .section-desc{max-width:560px;color:var(--muted);margin:0}
        .metrics{background:#fff;border-bottom:1px solid var(--line);padding:28px 0}
        .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .metric{padding:18px 20px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow-sm)}
        .metric small{display:block;color:var(--muted);font-size:13px}.metric strong{font-size:29px;line-height:1.3;color:var(--blue-deep);display:block}
        .matrix{background:#fff}
        .matrix-grid{display:grid;grid-template-columns:1.35fr .82fr .82fr;gap:18px;align-items:start}
        .feature-card{background:var(--blue-deep);color:#fff;border-radius:var(--radius);padding:31px;min-height:318px;box-shadow:var(--shadow)}
        .feature-card h3{font-size:28px;margin:20px 0 13px}.feature-card p{color:#dbe8ff}
        .tag-list{display:flex;gap:7px;flex-wrap:wrap}.tag{display:inline-block;padding:4px 10px;border-radius:99px;background:var(--blue-soft);color:var(--blue-deep);font-size:12px;font-weight:700}.feature-card .tag{background:rgba(255,255,255,.15);color:#fff}
        .mini-card{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:#fff;box-shadow:var(--shadow-sm);transition:.22s ease}
        .mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
        .mini-card.tall{margin-top:52px}.mini-card h3{font-size:21px;margin:18px 0 10px}.mini-card p{color:var(--muted);font-size:14px;margin-bottom:18px}
        .index{color:var(--warm);font-weight:800;font-size:13px}
        .text-link{color:var(--blue);font-weight:800;font-size:14px}.text-link:after{content:"  →"}
        .compare{background:#f2f6fc}
        .compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .compare-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
        .compare-panel.highlight{border-color:#aac6ed;box-shadow:var(--shadow-sm)}
        .compare-panel h3{font-size:23px;margin-bottom:20px}
        .compare-line{display:flex;gap:12px;padding:13px 0;border-top:1px solid #edf1f6;color:var(--muted);font-size:14px}
        .compare-line b{color:var(--success);font-size:18px;line-height:1}.compare-panel:first-child .compare-line b{color:#a3afbe}
        .topic-section{background:#fff}
        .topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
        .topic-card{border:1px solid var(--line);border-radius:17px;padding:22px;background:#fbfdff}
        .topic-card h3{font-size:20px;margin:12px 0 8px}.topic-card p{font-size:14px;color:var(--muted);margin:0 0 15px}
        .faq-wrap{max-width:900px;margin:auto}
        .accordion-item{border:1px solid var(--line)!important;border-radius:14px!important;overflow:hidden;margin-bottom:10px;background:#fff}
        .accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:19px 21px;box-shadow:none!important}
        .accordion-button:not(.collapsed){color:var(--blue-deep);background:#f4f8ff}
        .accordion-button:focus{box-shadow:0 0 0 3px rgba(53,104,184,.18)!important}
        .accordion-body{color:var(--muted);font-size:15px;padding:0 21px 21px}
        .lead-section{background:var(--blue-deep);color:#fff}
        .lead-section .section-kicker{color:#dceaff}.lead-section .section-kicker:before{background:var(--warm)}
        .lead-section h2{font-size:38px;margin:14px 0}.lead-section p{color:#d6e4fb}
        .form-shell{display:grid;grid-template-columns:.85fr 1.15fr;gap:42px;align-items:start}
        .form-card{background:#fff;border-radius:20px;padding:25px;box-shadow:var(--shadow)}
        .form-label{font-size:13px;font-weight:700;margin-bottom:6px}.form-control,.form-select{border:1px solid #d5dfeb;border-radius:10px;padding:11px 13px;color:var(--ink)}
        .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(53,104,184,.14)}
        .form-note{font-size:12px;color:var(--muted);margin:14px 0 0}
        .form-status{display:none;font-size:13px;margin-top:12px;color:var(--success)}
        .site-footer{background:#142642;color:#dbe6f7;padding:52px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
        .footer-brand{font-size:18px;font-weight:800;color:#fff;margin-bottom:12px}.footer-copy{color:#9db0cb;font-size:14px;max-width:285px}
        .footer-title{font-size:13px;font-weight:800;color:#fff;margin-bottom:14px}.footer-links{list-style:none;padding:0;margin:0}.footer-links li{margin:8px 0}.footer-links a{font-size:13px;color:#9db0cb}.footer-links a:hover{color:#fff}
        .copyright{border-top:1px solid rgba(219,230,247,.14);margin-top:38px;padding-top:18px;color:#91a5c1;font-size:12px;display:flex;justify-content:space-between;gap:20px}
        :focus-visible{outline:3px solid rgba(242,166,90,.8);outline-offset:3px}
        @media (max-width:992px){.nav-wrap{gap:14px}.nav-scroll{overflow-x:auto}.matrix-grid{grid-template-columns:1fr 1fr}.feature-card{grid-row:span 2}.metric-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
        @media (max-width:768px){.nav-wrap{min-height:68px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}.brand{flex:1}.menu-toggle{display:block}.nav-scroll{order:3;flex-basis:100%;display:none;padding-bottom:3px}.nav-scroll.open{display:flex}.nav-cta{font-size:13px;padding:9px 12px}.hero{padding:62px 0 48px}section{padding:64px 0}.hero-board{margin-top:40px}.board-grid{grid-template-columns:repeat(2,1fr)}.section-head{display:block}.section-desc{margin-top:14px}.form-shell{grid-template-columns:1fr;gap:24px}.topic-grid{grid-template-columns:1fr 1fr}}
        @media (max-width:576px){.container{padding:0 17px}h1{font-size:37px}.hero-copy{font-size:16px}.hero-actions a{width:100%;text-align:center}.hero-strip{display:grid;grid-template-columns:1fr}.board-grid{grid-template-columns:1fr 1fr}.matrix-grid,.compare-grid,.topic-grid{grid-template-columns:1fr}.feature-card{grid-row:auto}.mini-card.tall{margin-top:0}.metric strong{font-size:24px}.footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin-top:7px}}

/* roulang page: category1 */
:root{
 --ink:#17243b;--muted:#66748b;--blue:#3568b8;--blue-deep:#214b91;
 --blue-soft:#eaf2ff;--cream:#fbfcfe;--paper:#fff;--line:#dce5f1;
 --warm:#f2a65a;--success:#2e8b78;--radius:20px;
 --shadow:0 16px 42px rgba(38,73,126,.10);--shadow-sm:0 8px 24px rgba(38,73,126,.08);
 --container:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--cream);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75}
a{color:inherit;text-decoration:none;transition:.22s ease}
a:hover{color:var(--blue)}
button,input,select,textarea{font:inherit}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(242,166,90,.55);outline-offset:3px}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(251,252,254,.95);border-bottom:1px solid rgba(220,229,241,.9);backdrop-filter:blur(14px)}
.nav-wrap{min-height:78px;display:flex;align-items:center;gap:26px}
.brand{display:flex;align-items:center;gap:11px;white-space:nowrap;font-weight:800;font-size:19px;letter-spacing:-.5px}
.brand-mark{width:34px;height:34px;border-radius:11px;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:14px;box-shadow:0 6px 14px rgba(53,104,184,.25)}
.nav-scroll{display:flex;align-items:center;gap:7px;flex:1;min-width:0}
.nav-link{padding:8px 15px;border:1px solid transparent;border-radius:999px;color:var(--muted);font-size:14px;white-space:nowrap}
.nav-link:hover{color:var(--blue);background:var(--blue-soft);border-color:#cbdcf8}
.nav-link.active{color:var(--blue-deep);background:#fff;border-color:#bcd0ee;box-shadow:0 4px 12px rgba(53,104,184,.08)}
.nav-cta,.btn-primary{border:0;background:var(--blue);color:#fff;border-radius:12px;padding:11px 18px;font-weight:700;white-space:nowrap;box-shadow:0 8px 18px rgba(53,104,184,.2)}
.nav-cta:hover,.btn-primary:hover{background:var(--blue-deep);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px rgba(53,104,184,.27)}
.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:7px 11px;color:var(--ink)}
.page-hero{background:#edf5ff;border-bottom:1px solid #dae7f7;padding:78px 0 66px;position:relative;overflow:hidden}
.page-hero:after{content:"";position:absolute;width:360px;height:360px;border:1px solid #c9ddf7;border-radius:50%;right:-100px;top:-130px}
.hero-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:58px;align-items:center;position:relative;z-index:1}
.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--blue-deep);font-size:12px;font-weight:800;letter-spacing:.12em}
.eyebrow:before,.section-kicker:before{content:"";width:24px;height:2px;background:var(--warm)}
h1{font-size:clamp(36px,5vw,58px);line-height:1.16;letter-spacing:-1.8px;margin:16px 0 20px;font-weight:850}
h2{font-size:clamp(28px,3.3vw,42px);line-height:1.25;letter-spacing:-1px;margin:12px 0}
h3{line-height:1.35}
.hero-copy{max-width:650px;color:#55657d;font-size:18px;margin:0 0 28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn-secondary{background:#fff;border:1px solid #bfd2ec;color:var(--blue-deep);border-radius:12px;padding:10px 18px;font-weight:700}
.btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-deep);transform:translateY(-2px)}
.tag-list{display:flex;gap:8px;flex-wrap:wrap}
.tag{display:inline-block;padding:4px 11px;border-radius:99px;background:var(--blue-soft);color:var(--blue-deep);font-size:12px;font-weight:700}
.index-board{background:#fff;border:1px solid #d5e2f2;border-radius:22px;padding:25px;box-shadow:var(--shadow)}
.board-label{font-size:12px;color:var(--muted);font-weight:800;letter-spacing:.08em}
.board-title{font-size:23px;font-weight:800;margin:8px 0 18px}
.board-row{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding:14px 0;color:var(--muted);font-size:14px}
.board-row strong{color:var(--ink)}
section{padding:86px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:32px}
.section-desc{max-width:560px;color:var(--muted);margin:0}
.filter-bar{display:flex;gap:9px;flex-wrap:wrap;padding:18px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-sm);margin-bottom:28px}
.filter{border:1px solid var(--line);border-radius:99px;background:#fff;color:var(--muted);padding:8px 15px;font-size:14px;cursor:pointer}
.filter:hover,.filter.active{background:var(--blue);border-color:var(--blue);color:#fff}
.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:24px;align-items:start}
.topic-list{display:grid;gap:14px}
.topic-item{display:grid;grid-template-columns:64px 1fr auto;gap:20px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:18px;padding:23px;box-shadow:var(--shadow-sm);transition:.22s ease}
.topic-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#bcd0ee}
.topic-number{font-size:27px;color:var(--blue);font-weight:850;line-height:1}
.topic-item h3{font-size:21px;margin:0 0 7px}
.topic-item p{font-size:14px;color:var(--muted);margin:0 0 12px}
.topic-meta{font-size:12px;color:var(--muted)}
.topic-side{background:var(--blue-deep);color:#fff;border-radius:20px;padding:26px;box-shadow:var(--shadow);position:sticky;top:105px}
.topic-side h3{font-size:23px;margin:12px 0}
.topic-side p{color:#dbe8ff;font-size:14px}
.side-list{list-style:none;padding:0;margin:20px 0 0}
.side-list li{border-top:1px solid rgba(255,255,255,.2);padding:12px 0;color:#e8f1ff;font-size:14px}
.side-list span{color:#9fc2f3;margin-right:9px;font-weight:800}
.info-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.step-card{background:#f8fbff;border:1px solid var(--line);border-radius:17px;padding:24px}
.step-no{color:var(--warm);font-size:13px;font-weight:850}
.step-card h3{font-size:20px;margin:11px 0 7px}
.step-card p{color:var(--muted);font-size:14px;margin:0}
.faq-wrap{max-width:900px;margin:auto}
.accordion-item{border:1px solid var(--line)!important;border-radius:14px!important;overflow:hidden;margin-bottom:10px;background:#fff}
.accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:19px 21px;box-shadow:none!important}
.accordion-button:not(.collapsed){color:var(--blue-deep);background:#f4f8ff}
.accordion-button:focus{box-shadow:0 0 0 3px rgba(53,104,184,.16)!important}
.cta-section{padding:72px 0}
.cta-box{background:#eaf2ff;border:1px solid #cbdcf3;border-radius:24px;padding:38px;display:flex;justify-content:space-between;align-items:center;gap:30px}
.cta-box p{color:var(--muted);margin:8px 0 0}
.site-footer{background:#172d50;color:#dbe8ff;padding:54px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px}
.footer-brand{font-size:20px;font-weight:800;color:#fff}
.footer-copy{color:#aebfda;font-size:14px;max-width:280px;margin-top:12px}
.footer-title{font-size:13px;font-weight:800;color:#fff;margin-bottom:12px}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin:7px 0}
.footer-links a{color:#b8c9e1;font-size:14px}
.footer-links a:hover{color:#fff}
.copyright{display:flex;justify-content:space-between;gap:15px;border-top:1px solid rgba(255,255,255,.15);margin-top:38px;padding-top:18px;color:#9db2d0;font-size:12px}
@media(max-width:991px){.hero-layout{grid-template-columns:1fr;gap:30px}.content-layout{grid-template-columns:1fr}.topic-side{position:static}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}}
@media(max-width:767px){.nav-wrap{min-height:68px;gap:12px}.brand{font-size:16px}.menu-toggle{display:block;margin-left:auto}.nav-cta{display:none}.nav-scroll{order:3;flex-basis:100%;overflow-x:auto;padding-bottom:8px}.nav-wrap{flex-wrap:wrap}.page-hero{padding:58px 0 48px}section{padding:62px 0}.section-head{display:block}.section-head .section-desc{margin-top:14px}.topic-item{grid-template-columns:42px 1fr}.topic-item .text-link{grid-column:2}.step-grid{grid-template-columns:1fr}.cta-box{display:block;padding:28px}.cta-box .btn-primary{margin-top:20px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:5px}}
@media(max-width:575px){.container{padding:0 18px}.brand-mark{width:31px;height:31px}.brand{font-size:14px}.nav-scroll{gap:3px}.nav-link{padding:7px 11px}.hero-copy{font-size:16px}h1{font-size:36px}.index-board{padding:20px}.topic-item{padding:18px;gap:13px}.topic-item h3{font-size:18px}.footer-grid{grid-template-columns:1fr}.copyright{margin-top:28px}}