/* roulang page: index */
:root{
            --ink:#171b1b;
            --ink-soft:#293333;
            --paper:#f3f1eb;
            --paper-deep:#e7e5dc;
            --white:#fffdf8;
            --muted:#737a76;
            --line:#d5d6cc;
            --acid:#c5ed68;
            --teal:#78c8b3;
            --orange:#e59b62;
            --radius:16px;
            --shadow:0 18px 50px rgba(23,27,27,.10);
            --ease:all .25s ease;
        }
        *,*::before,*::after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;background:var(--paper);color:var(--ink);
            font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
            line-height:1.75;font-size:16px;
        }
        a{color:inherit;text-decoration:none;transition:var(--ease)}
        a:hover{color:var(--ink)}
        img{max-width:100%;display:block}
        button,input,textarea{font:inherit}
        .container{max-width:1180px;margin:auto;padding-left:22px;padding-right:22px}
        .topline{height:5px;background:var(--acid)}
        .site-header{position:sticky;top:0;z-index:20;background:rgba(243,241,235,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
        .nav-shell{min-height:78px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:26px}
        .nav-group{display:flex;align-items:center;gap:25px}
        .nav-group.right{justify-content:flex-end}
        .nav-link{position:relative;color:#59615d;font-size:14px;padding:7px 0;white-space:nowrap}
        .nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:3px;background:var(--orange);transition:var(--ease)}
        .nav-link:hover,.nav-link.active{color:var(--ink);font-weight:700}
        .nav-link:hover::after,.nav-link.active::after{width:100%}
        .brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:-.04em;font-size:18px;white-space:nowrap}
        .brand-mark{width:31px;height:31px;border:7px solid var(--ink);border-radius:50%;position:relative}
        .brand-mark::after{content:"";position:absolute;width:9px;height:9px;right:-6px;top:-6px;background:var(--acid);border-radius:2px}
        .menu-toggle{display:none;border:1px solid var(--line);background:var(--white);border-radius:9px;padding:8px 11px}
        .hero{position:relative;overflow:hidden;background:var(--ink);color:var(--white);padding:96px 0 82px}
        .hero::before{content:"";position:absolute;inset:0;opacity:.16;background-image:linear-gradient(90deg,rgba(255,255,255,.2) 1px,transparent 1px),linear-gradient(rgba(255,255,255,.2) 1px,transparent 1px);background-size:68px 68px;mask-image:linear-gradient(90deg,#000,transparent 78%)}
        .hero::after{content:"";position:absolute;width:430px;height:430px;border:1px solid rgba(197,237,104,.45);border-radius:50%;right:-90px;top:-120px;box-shadow:0 0 0 34px rgba(197,237,104,.06),0 0 0 70px rgba(197,237,104,.04)}
        .hero .container{position:relative;z-index:1}
        .eyebrow,.section-kicker{font-size:12px;letter-spacing:.18em;font-weight:800;text-transform:uppercase;color:var(--teal)}
        .eyebrow span{color:var(--acid);margin-right:10px}
        .hero h1{font-size:clamp(42px,6.2vw,82px);line-height:1.08;letter-spacing:-.07em;max-width:780px;margin:22px 0 25px;font-weight:900}
        .hero h1 em{font-style:normal;color:var(--acid)}
        .hero-copy{max-width:650px;color:#cbd0ca;font-size:18px;line-height:1.9}
        .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:31px}
        .btn-main,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:9px;padding:12px 19px;font-weight:800;font-size:14px;border:1px solid transparent;transition:var(--ease)}
        .btn-main{background:var(--acid);color:var(--ink)}
        .btn-main:hover{background:#e0ff9a;transform:translateY(-2px)}
        .btn-ghost{border-color:#606a64;color:var(--white)}
        .btn-ghost:hover{border-color:var(--acid);color:var(--acid);transform:translateY(-2px)}
        .hero-strip{display:flex;gap:12px;flex-wrap:wrap;margin-top:52px}
        .hero-chip{border-left:3px solid var(--acid);padding:7px 18px 7px 13px;background:rgba(255,255,255,.06);color:#dce3dc;font-size:13px}
        .hero-board{margin-top:54px;border-top:1px solid #58615c;border-bottom:1px solid #58615c;display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr}
        .board-item{padding:19px 20px;border-right:1px solid #58615c}
        .board-item:last-child{border-right:0}
        .board-label{display:block;color:#89938c;font-size:12px;margin-bottom:5px}
        .board-value{font-size:23px;font-weight:900;color:var(--acid)}
        section{padding:92px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:38px}
        .section-head h2{font-size:clamp(28px,4vw,46px);line-height:1.18;letter-spacing:-.045em;margin:10px 0 0;font-weight:900}
        .section-head p{max-width:510px;color:var(--muted);margin:0;line-height:1.85}
        .service-grid{display:grid;grid-template-columns:1.25fr .85fr;gap:18px}
        .service-main,.service-card,.feature-card,.path-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);transition:var(--ease)}
        .service-main{padding:34px;display:flex;flex-direction:column;justify-content:space-between;min-height:280px;background:var(--teal)}
        .service-main h3{font-size:30px;margin:18px 0 8px;letter-spacing:-.04em}
        .service-main p{max-width:600px;margin:0;color:#243e39}
        .service-side{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .service-card{padding:25px;min-height:130px}
        .service-card:hover,.feature-card:hover,.path-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
        .card-num{font-size:12px;color:#a36c40;font-weight:900;letter-spacing:.12em}
        .service-card h3,.feature-card h3,.path-card h3{font-size:20px;margin:12px 0 7px;letter-spacing:-.025em}
        .service-card p,.feature-card p,.path-card p{font-size:14px;color:var(--muted);margin:0;line-height:1.7}
        .text-link{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:800;margin-top:20px}
        .text-link:hover{gap:11px;color:#8d5b36}
        .stats{background:var(--ink);color:var(--white);padding:30px 0}
        .stats-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr)}
        .stat{padding:14px 25px;border-left:1px solid #4a5550}
        .stat strong{font-size:42px;line-height:1;color:var(--acid);display:block;margin-bottom:9px}
        .stat span{font-size:13px;color:#b8c0ba}
        .case-layout{display:grid;grid-template-columns:1.35fr .65fr;gap:18px}
        .feature-card{padding:32px;min-height:320px;background:linear-gradient(145deg,#fffdf8 0%,#e9efe2 100%);position:relative;overflow:hidden}
        .feature-card::after{content:"精选";position:absolute;right:-27px;top:20px;background:var(--orange);color:var(--white);font-size:12px;padding:5px 32px;transform:rotate(35deg);font-weight:800}
        .feature-card h3{font-size:30px;margin-top:25px}
        .case-list{display:flex;flex-direction:column;gap:18px}
        .case-item{background:var(--white);border:1px solid var(--line);padding:22px;border-radius:var(--radius);display:flex;gap:15px;align-items:start}
        .case-item:hover{border-color:var(--orange)}
        .case-index{font-size:25px;font-weight:900;color:var(--orange);line-height:1}
        .case-item h3{font-size:17px;margin:0 0 5px}
        .case-item p{font-size:13px;color:var(--muted);margin:0;line-height:1.65}
        .tag{display:inline-block;border:1px solid #b8c6a5;color:#637146;background:#eef5df;border-radius:5px;padding:3px 8px;font-size:11px;font-weight:800}
        .paths{background:var(--paper-deep)}
        .path-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .path-card{padding:28px;min-height:220px}
        .path-card:nth-child(2){background:var(--ink);color:var(--white);border-color:var(--ink)}
        .path-card:nth-child(2) p{color:#bdc6c0}
        .path-card:nth-child(2) .card-num{color:var(--acid)}
        .path-card:nth-child(2) .text-link{color:var(--acid)}
        .faq-wrap{max-width:900px}
        .accordion-item{border:0;border-bottom:1px solid var(--line);background:transparent}
        .accordion-button{background:transparent!important;color:var(--ink)!important;box-shadow:none!important;padding:23px 4px;font-weight:800;font-size:17px}
        .accordion-button::after{background-image:none;content:"+";font-size:23px;font-weight:400;color:var(--orange);width:auto;height:auto}
        .accordion-button:not(.collapsed)::after{content:"−"}
        .accordion-body{padding:0 45px 23px 4px;color:var(--muted);font-size:14px;line-height:1.85}
        .contact{padding-top:40px}
        .contact-panel{background:var(--ink);color:var(--white);border-radius:var(--radius);padding:43px;display:grid;grid-template-columns:.8fr 1.2fr;gap:55px}
        .contact-panel h2{font-size:39px;line-height:1.2;letter-spacing:-.05em;margin:14px 0}
        .contact-panel p{color:#bcc5be;line-height:1.85}
        .contact-form{display:grid;grid-template-columns:1fr 1fr;gap:15px}
        .field-full{grid-column:1/-1}
        .form-control{background:#252d2a;border:1px solid #48534c;color:var(--white);border-radius:8px;padding:12px 14px}
        .form-control::placeholder{color:#89928b}
        .form-control:focus{background:#29322e;color:var(--white);border-color:var(--acid);box-shadow:0 0 0 3px rgba(197,237,104,.18)}
        .form-label{font-size:12px;color:#b9c4bb;margin-bottom:5px}
        .form-note{font-size:12px;color:#8d9890;margin-top:11px}
        footer{background:#111514;color:#c8d0c9;padding:43px 0 24px;border-top:1px solid #303934}
        .footer-top{display:flex;justify-content:space-between;gap:30px;align-items:start}
        .footer-brand{color:var(--white);font-size:18px;font-weight:900}
        footer p{color:#89938c;font-size:13px;max-width:350px;margin:12px 0 0}
        .footer-links{display:flex;gap:28px;flex-wrap:wrap;font-size:13px}
        .footer-links a:hover{color:var(--acid)}
        .copyright{border-top:1px solid #303934;margin-top:35px;padding-top:18px;color:#69746c;font-size:12px}
        :focus-visible{outline:3px solid var(--orange);outline-offset:3px}
        @media(max-width:991px){
            .nav-shell{grid-template-columns:1fr auto}
            .brand{justify-self:start}.nav-group{display:none}
            .menu-toggle{display:block;justify-self:end}
            .mobile-nav{display:none;background:var(--white);border-top:1px solid var(--line);padding:8px 22px 18px}
            .mobile-nav.show{display:block}
            .mobile-nav a{display:block;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px}
            .hero{padding:74px 0 60px}
            .hero-board{grid-template-columns:repeat(2,1fr)}
            .board-item:nth-child(2){border-right:0}.board-item:nth-child(-n+2){border-bottom:1px solid #58615c}
            .stats-grid{grid-template-columns:repeat(2,1fr)}
            .stat{border-top:1px solid #4a5550}
        }
        @media(max-width:767px){
            .container{padding-left:18px;padding-right:18px}
            section{padding:65px 0}
            .section-head{display:block;margin-bottom:27px}.section-head p{margin-top:16px}
            .hero h1{font-size:47px}.hero-copy{font-size:16px}
            .hero-strip{margin-top:35px}.hero-board{margin-top:38px}
            .service-grid,.case-layout,.contact-panel{grid-template-columns:1fr}
            .service-side{grid-template-columns:1fr 1fr}
            .path-grid{grid-template-columns:1fr}
            .contact-panel{padding:28px;gap:28px}.contact-panel h2{font-size:31px}
            .footer-top{display:block}.footer-links{margin-top:25px;gap:16px}
        }
        @media(max-width:520px){
            .brand{font-size:15px}.brand-mark{width:27px;height:27px;border-width:6px}
            .hero h1{font-size:39px}.hero-actions .btn-main,.hero-actions .btn-ghost{width:100%}
            .hero-board{grid-template-columns:1fr}.board-item{border-right:0!important;border-bottom:1px solid #58615c!important}
            .board-item:last-child{border-bottom:0!important}
            .service-side,.stats-grid{grid-template-columns:1fr}
            .stat{border-left:0;padding:18px 0}
            .contact-form{grid-template-columns:1fr}.field-full{grid-column:auto}
            .feature-card{padding:25px}.feature-card h3{font-size:25px}
        }

/* roulang page: category2 */
:root{
 --ink:#171b1b;
 --ink-soft:#293333;
 --paper:#f3f1eb;
 --paper-deep:#e7e5dc;
 --white:#fffdf8;
 --muted:#737a76;
 --line:#d5d6cc;
 --acid:#c5ed68;
 --teal:#78c8b3;
 --orange:#e59b62;
 --radius:16px;
 --shadow:0 18px 50px rgba(23,27,27,.10);
 --ease:all .25s ease;
}
html{scroll-behavior:smooth}
*{box-sizing:border-box}
body{
 margin:0;background:var(--paper);color:var(--ink);
 font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
 line-height:1.75;font-size:16px;
}
a{color:inherit;text-decoration:none;transition:var(--ease)}
a:hover{color:var(--ink)}
img{max-width:100%;display:block}
button,input,textarea,select{font:inherit}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(197,237,104,.8);outline-offset:3px}
.container{max-width:1180px;margin:auto;padding-left:22px;padding-right:22px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(243,241,235,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-shell{min-height:78px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:26px}
.nav-group{display:flex;align-items:center;gap:25px}
.nav-group.right{justify-content:flex-end}
.nav-link{position:relative;color:#59615d;font-size:14px;padding:7px 0;white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:3px;background:var(--orange);transition:var(--ease)}
.nav-link:hover,.nav-link.active{color:var(--ink);font-weight:700}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:-.04em;font-size:18px;white-space:nowrap}
.brand-mark{width:31px;height:31px;border:7px solid var(--ink);border-radius:50%;position:relative}
.brand-mark::after{content:"";position:absolute;width:9px;height:9px;right:-6px;top:-6px;background:var(--acid);border-radius:2px}
.menu-toggle{display:none;border:1px solid var(--line);background:var(--white);border-radius:9px;padding:8px 11px;color:var(--ink)}
.mobile-nav{display:none;background:var(--white);border-top:1px solid var(--line);padding:10px 22px 18px}
.mobile-nav.show{display:block}
.mobile-nav a{display:block;padding:12px 0;border-bottom:1px solid var(--line);font-weight:700}
.hero{position:relative;overflow:hidden;background:var(--ink);color:var(--white);padding:82px 0 66px}
.hero::before{content:"";position:absolute;inset:0;opacity:.16;background-image:linear-gradient(90deg,rgba(255,255,255,.2) 1px,transparent 1px),linear-gradient(rgba(255,255,255,.2) 1px,transparent 1px);background-size:68px 68px;mask-image:linear-gradient(90deg,#000,transparent 78%)}
.hero::after{content:"";position:absolute;width:430px;height:430px;border:1px solid rgba(197,237,104,.45);border-radius:50%;right:-90px;top:-120px;box-shadow:0 0 0 34px rgba(197,237,104,.06),0 0 0 70px rgba(197,237,104,.04)}
.hero .container{position:relative;z-index:1}
.eyebrow,.section-kicker{font-size:12px;letter-spacing:.18em;font-weight:800;color:var(--teal)}
.eyebrow span{color:var(--acid);margin-right:10px}
.hero h1{font-size:clamp(40px,6vw,76px);line-height:1.1;letter-spacing:-.07em;max-width:760px;margin:20px 0 22px;font-weight:900}
.hero h1 em{font-style:normal;color:var(--acid)}
.hero-copy{max-width:680px;color:#cbd0ca;font-size:18px;line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn-main,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:9px;padding:12px 19px;font-weight:800;font-size:14px;border:1px solid transparent;transition:var(--ease)}
.btn-main{background:var(--acid);color:var(--ink)}
.btn-main:hover{background:#e0ff9a;transform:translateY(-2px)}
.btn-ghost{border-color:#606a64;color:var(--white)}
.btn-ghost:hover{border-color:var(--acid);color:var(--acid);transform:translateY(-2px)}
.hero-board{margin-top:45px;border-top:1px solid #58615c;border-bottom:1px solid #58615c;display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr}
.board-item{padding:18px 20px;border-right:1px solid #58615c}
.board-item:last-child{border-right:0}
.board-label{font-size:12px;color:#aeb8b0}
.board-value{font-size:25px;font-weight:900;color:var(--acid);line-height:1.2;margin-top:5px}
section{padding:88px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
.section-head h2{font-size:clamp(28px,4vw,46px);line-height:1.18;letter-spacing:-.045em;margin:10px 0 0;font-weight:900}
.section-head p{max-width:540px;color:var(--muted);margin:0;line-height:1.85}
.index-layout{display:grid;grid-template-columns:280px 1fr;gap:20px;align-items:start}
.filter-panel,.topic-main,.route-card,.faq-wrap,.feedback-panel{background:var(--white);border:1px solid var(--line);border-radius:var(--radius)}
.filter-panel{padding:24px;position:sticky;top:104px}
.filter-panel h3{font-size:19px;margin:0 0 18px}
.filter-title{font-size:12px;color:var(--muted);font-weight:800;letter-spacing:.08em;margin:22px 0 10px}
.filter-btn{display:flex;width:100%;align-items:center;justify-content:space-between;text-align:left;background:transparent;border:0;border-bottom:1px solid var(--line);padding:11px 0;color:var(--muted);font-size:14px}
.filter-btn:hover,.filter-btn.active{color:var(--ink);font-weight:800}
.filter-btn.active i{color:var(--orange)}
.search-box{display:flex;border:1px solid var(--line);border-radius:9px;background:var(--paper);overflow:hidden}
.search-box input{width:100%;border:0;background:transparent;padding:10px 12px;outline:0;font-size:14px}
.search-box button{border:0;background:var(--ink);color:var(--acid);padding:0 14px}
.topic-main{padding:27px}
.topic-top{display:flex;justify-content:space-between;align-items:center;gap:18px;border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:18px}
.topic-top h3{margin:0;font-size:22px}
.status-note{font-size:13px;color:var(--muted)}
.topic-item{display:grid;grid-template-columns:58px 1fr auto;gap:18px;align-items:start;padding:20px 0;border-bottom:1px solid var(--line)}
.topic-item:last-child{border-bottom:0}
.item-number{font-size:24px;font-weight:900;color:var(--orange);line-height:1}
.topic-item h4{font-size:18px;margin:0 0 5px}
.topic-item p{font-size:14px;color:var(--muted);margin:0;line-height:1.7}
.tag{display:inline-block;border:1px solid #b8c6a5;color:#637146;background:#eef5df;border-radius:5px;padding:3px 8px;font-size:11px;font-weight:800;margin-bottom:8px}
.text-link{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:800;white-space:nowrap}
.text-link:hover{gap:11px;color:#8d5b36}
.route-section{background:var(--paper-deep)}
.route-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.route-card{padding:27px;min-height:210px;transition:var(--ease)}
.route-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--orange)}
.route-num{font-size:12px;color:#a36c40;font-weight:900;letter-spacing:.14em}
.route-card h3{font-size:23px;margin:17px 0 8px}
.route-card p{color:var(--muted);font-size:14px;margin:0;max-width:500px}
.route-card .text-link{margin-top:22px}
.faq-wrap{padding:10px 25px}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line)}
.accordion-item:last-child{border-bottom:0}
.accordion-button{background:transparent!important;color:var(--ink)!important;box-shadow:none!important;padding:21px 4px;font-weight:800}
.accordion-button::after{background-image:none;content:"+";font-size:22px;color:var(--orange);transform:none}
.accordion-button:not(.collapsed)::after{content:"−"}
.accordion-body{color:var(--muted);font-size:14px;line-height:1.85;padding:0 35px 22px 4px}
.feedback{background:var(--ink);color:var(--white)}
.feedback-panel{background:transparent;border:0;border-radius:0;display:grid;grid-template-columns:.85fr 1.15fr;gap:60px}
.feedback .section-kicker{color:var(--teal)}
.feedback h2{font-size:clamp(30px,4vw,48px);line-height:1.2;margin:13px 0 16px;letter-spacing:-.05em}
.feedback p{color:#bfc8c0;max-width:440px}
.feedback-form{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.form-field.full{grid-column:1/-1}
.form-label{display:block;font-size:13px;color:#cbd0ca;margin-bottom:6px}
.form-control,.form-select{background:#232b29;border:1px solid #48534d;color:var(--white);border-radius:8px;padding:12px 13px}
.form-control::placeholder{color:#89938c}
.form-control:focus,.form-select:focus{background:#232b29;color:var(--white);border-color:var(--acid);box-shadow:0 0 0 3px rgba(197,237,104,.12)}
textarea.form-control{min-height:118px;resize:vertical}
.form-status{grid-column:1/-1;color:var(--acid);font-size:13px;min-height:24px}
footer{background:#111515;color:#d7ded7;padding:38px 0 25px}
.footer-top{display:flex;justify-content:space-between;gap:35px;padding-bottom:28px;border-bottom:1px solid #343c38}
.footer-brand{font-size:20px;font-weight:900}
.footer-top p{color:#8d9890;font-size:13px;margin:8px 0 0}
.footer-links{display:flex;flex-wrap:wrap;gap:22px;align-items:start;font-size:13px;color:#aeb8b0}
.footer-links a:hover{color:var(--acid)}
.copyright{color:#78837b;font-size:12px;padding-top:20px}
@media (max-width:991px){
 .nav-shell{grid-template-columns:1fr auto;gap:15px}
 .nav-group{display:none}
 .brand{justify-self:start}
 .menu-toggle{display:block;justify-self:end}
 .index-layout{grid-template-columns:1fr}
 .filter-panel{position:static}
 .filter-controls{display:grid;grid-template-columns:1fr 1fr;gap:18px}
 .filter-title{margin-top:0}
}
@media (max-width:767px){
 section{padding:64px 0}
 .container{padding-left:17px;padding-right:17px}
 .hero{padding:65px 0 50px}
 .hero h1{font-size:clamp(38px,12vw,56px)}
 .hero-copy{font-size:16px}
 .hero-board{grid-template-columns:1fr 1fr;margin-top:35px}
 .board-item{border-bottom:1px solid #58615c}
 .board-item:nth-child(2){border-right:0}
 .section-head{display:block;margin-bottom:25px}
 .section-head p{margin-top:15px}
 .filter-controls{display:block}
 .filter-title{margin-top:20px}
 .topic-main{padding:20px 17px}
 .topic-item{grid-template-columns:40px 1fr;gap:12px}
 .topic-item .text-link{grid-column:2}
 .route-grid{grid-template-columns:1fr}
 .feedback-panel{display:block}
 .feedback-form{margin-top:30px}
 .footer-top{display:block}
 .footer-links{margin-top:22px;gap:14px 20px}
}
@media (max-width:520px){
 .brand{font-size:15px}
 .brand-mark{width:27px;height:27px;border-width:6px}
 .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%}
 .hero-board{grid-template-columns:1fr}
 .board-item,.board-item:nth-child(2){border-right:0}
 .feedback-form{grid-template-columns:1fr}
 .form-field.full,.form-status{grid-column:auto}
 .feedback-form .btn-main{width:100%}
}

/* roulang page: category1 */
:root{
      --ink:#171b1b;
      --ink-soft:#293333;
      --paper:#f3f1eb;
      --paper-deep:#e7e5dc;
      --white:#fffdf8;
      --muted:#737a76;
      --line:#d5d6cc;
      --acid:#c5ed68;
      --teal:#78c8b3;
      --orange:#e59b62;
      --radius:16px;
      --shadow:0 18px 50px rgba(23,27,27,.10);
      --ease:all .25s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;background:var(--paper);color:var(--ink);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      line-height:1.75;font-size:16px;
    }
    a{color:inherit;text-decoration:none;transition:var(--ease)}
    a:hover{color:var(--ink)}
    img{max-width:100%;display:block}
    button,input,textarea,select{font:inherit}
    .container{max-width:1180px;margin:auto;padding-left:22px;padding-right:22px}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(243,241,235,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
    .nav-shell{min-height:78px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:26px}
    .nav-group{display:flex;align-items:center;gap:25px}
    .nav-group.right{justify-content:flex-end}
    .nav-link{position:relative;color:#59615d;font-size:14px;padding:7px 0;white-space:nowrap}
    .nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:3px;background:var(--orange);transition:var(--ease)}
    .nav-link:hover,.nav-link.active{color:var(--ink);font-weight:700}
    .nav-link:hover::after,.nav-link.active::after{width:100%}
    .brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:-.04em;font-size:18px;white-space:nowrap}
    .brand-mark{width:31px;height:31px;border:7px solid var(--ink);border-radius:50%;position:relative}
    .brand-mark::after{content:"";position:absolute;width:9px;height:9px;right:-6px;top:-6px;background:var(--acid);border-radius:2px}
    .menu-toggle{display:none;border:1px solid var(--line);background:var(--white);border-radius:9px;padding:8px 11px;color:var(--ink)}
    .mobile-nav{display:none;padding:10px 22px 18px;border-top:1px solid var(--line);background:var(--white)}
    .mobile-nav.show{display:grid}
    .mobile-nav a{padding:11px 0;border-bottom:1px solid var(--line);font-size:14px}
    .mobile-nav a:last-child{border-bottom:0}
    .hero{position:relative;overflow:hidden;background:var(--ink);color:var(--white);padding:84px 0 70px}
    .hero::before{content:"";position:absolute;inset:0;opacity:.16;background-image:linear-gradient(90deg,rgba(255,255,255,.2) 1px,transparent 1px),linear-gradient(rgba(255,255,255,.2) 1px,transparent 1px);background-size:68px 68px;mask-image:linear-gradient(90deg,#000,transparent 78%)}
    .hero::after{content:"";position:absolute;width:430px;height:430px;border:1px solid rgba(197,237,104,.45);border-radius:50%;right:-90px;top:-120px;box-shadow:0 0 0 34px rgba(197,237,104,.06),0 0 0 70px rgba(197,237,104,.04)}
    .hero .container{position:relative;z-index:1}
    .eyebrow,.section-kicker{font-size:12px;letter-spacing:.18em;font-weight:800;color:var(--teal)}
    .eyebrow span{color:var(--acid);margin-right:10px}
    .hero h1{font-size:clamp(40px,6vw,72px);line-height:1.1;letter-spacing:-.07em;max-width:760px;margin:20px 0 22px;font-weight:900}
    .hero h1 em{font-style:normal;color:var(--acid)}
    .hero-copy{max-width:680px;color:#cbd0ca;font-size:18px;line-height:1.9}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:29px}
    .btn-main,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:9px;padding:12px 19px;font-weight:800;font-size:14px;border:1px solid transparent;transition:var(--ease)}
    .btn-main{background:var(--acid);color:var(--ink)}
    .btn-main:hover{background:#e0ff9a;transform:translateY(-2px)}
    .btn-ghost{border-color:#606a64;color:var(--white)}
    .btn-ghost:hover{border-color:var(--acid);color:var(--acid);transform:translateY(-2px)}
    .hero-strip{display:flex;gap:12px;flex-wrap:wrap;margin-top:45px}
    .hero-chip{border-left:3px solid var(--acid);padding:7px 18px 7px 13px;background:rgba(255,255,255,.06);color:#dce3dc;font-size:13px}
    .hero-board{margin-top:48px;border-top:1px solid #58615c;border-bottom:1px solid #58615c;display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr}
    .board-item{padding:18px 20px;border-right:1px solid #58615c}
    .board-item:last-child{border-right:0}
    .board-item strong{display:block;color:var(--acid);font-size:28px;line-height:1.2}
    .board-item span{display:block;color:#aeb9b0;font-size:12px;margin-top:6px}
    section{padding:86px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
    .section-head h2{font-size:clamp(28px,4vw,45px);line-height:1.18;letter-spacing:-.045em;margin:10px 0 0;font-weight:900}
    .section-head p{max-width:520px;color:var(--muted);margin:0;line-height:1.85}
    .browse-layout{display:grid;grid-template-columns:280px 1fr;gap:22px;align-items:start}
    .filter-panel,.browse-card,.topic-card,.route-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius)}
    .filter-panel{padding:24px;position:sticky;top:102px}
    .filter-panel h3{font-size:18px;margin:0 0 17px}
    .filter-label{display:block;color:var(--muted);font-size:12px;font-weight:800;margin:17px 0 7px}
    .search-box{width:100%;border:1px solid var(--line);background:#f8f7f1;border-radius:8px;padding:10px 12px;outline:0}
    .search-box:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(120,200,179,.22)}
    .filter-tags{display:flex;flex-wrap:wrap;gap:8px}
    .tag{display:inline-block;border:1px solid #b8c6a5;color:#637146;background:#eef5df;border-radius:5px;padding:3px 8px;font-size:11px;font-weight:800}
    .tag.muted{background:transparent;border-color:var(--line);color:var(--muted)}
    .browse-list{display:grid;gap:13px}
    .browse-card{display:grid;grid-template-columns:58px 1fr auto;gap:18px;align-items:center;padding:22px}
    .browse-card:hover,.topic-card:hover,.route-card:hover{border-color:var(--orange);transform:translateY(-3px);box-shadow:var(--shadow)}
    .browse-index{font-size:27px;font-weight:900;color:#b2b7ac;letter-spacing:-.08em}
    .browse-card h3,.topic-card h3,.route-card h3{font-size:19px;margin:7px 0 5px;letter-spacing:-.03em}
    .browse-card p,.topic-card p,.route-card p{color:var(--muted);font-size:14px;line-height:1.7;margin:0}
    .text-link{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:800;white-space:nowrap}
    .text-link:hover{gap:11px;color:#8d5b36}
    .split-section{background:var(--paper-deep)}
    .topic-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}
    .topic-card{padding:32px;min-height:300px}
    .topic-card.featured{background:var(--teal);border-color:var(--teal);display:flex;flex-direction:column;justify-content:space-between}
    .topic-card.featured p{color:#243e39;max-width:550px}
    .topic-card.featured h3{font-size:30px}
    .topic-stack{display:grid;gap:18px}
    .topic-stack .topic-card{min-height:141px;padding:24px}
    .route-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
    .route-card{padding:27px;min-height:230px;transition:var(--ease)}
    .route-no{font-size:12px;letter-spacing:.14em;font-weight:900;color:#a36c40}
    .route-card h3{font-size:23px;margin-top:20px}
    .route-card .text-link{margin-top:22px}
    .faq-wrap{max-width:850px}
    .accordion-item{background:var(--white);border:1px solid var(--line)!important;border-radius:12px!important;margin-bottom:11px;overflow:hidden}
    .accordion-button{background:var(--white)!important;color:var(--ink)!important;box-shadow:none!important;font-weight:800;padding:19px 22px}
    .accordion-button::after{background-image:none;content:"+";font-size:24px;color:#a36c40;transform:none}
    .accordion-button:not(.collapsed)::after{content:"−"}
    .accordion-button:focus{box-shadow:0 0 0 3px rgba(120,200,179,.22)!important}
    .accordion-body{color:var(--muted);font-size:14px;padding:0 22px 21px;line-height:1.85}
    .feedback-section{padding-top:20px}
    .feedback-panel{background:var(--ink);color:var(--white);border-radius:var(--radius);padding:42px;display:grid;grid-template-columns:.9fr 1.1fr;gap:45px}
    .feedback-panel h2{font-size:clamp(28px,4vw,43px);line-height:1.2;margin:12px 0 15px;letter-spacing:-.05em}
    .feedback-panel p{color:#cbd0ca;line-height:1.85}
    .feedback-form{display:grid;gap:13px}
    .feedback-form input,.feedback-form textarea{width:100%;background:#222a28;border:1px solid #53605a;color:var(--white);border-radius:8px;padding:11px 13px;outline:0}
    .feedback-form input:focus,.feedback-form textarea:focus{border-color:var(--acid);box-shadow:0 0 0 3px rgba(197,237,104,.16)}
    .feedback-form textarea{min-height:108px;resize:vertical}
    .feedback-form input::placeholder,.feedback-form textarea::placeholder{color:#87928a}
    .form-note{font-size:12px;color:#89958d;margin:0}
    footer{background:var(--ink);color:var(--white);padding:42px 0 25px;border-top:1px solid #39423e}
    .footer-top{display:flex;justify-content:space-between;gap:30px;align-items:start}
    .footer-brand{font-size:20px;font-weight:900;letter-spacing:-.04em}
    footer p{color:#aeb9b0;font-size:13px;margin:9px 0 0}
    .footer-links{display:flex;gap:22px;flex-wrap:wrap;color:#cbd0ca;font-size:13px}
    .footer-links a:hover{color:var(--acid)}
    .copyright{border-top:1px solid #39423e;margin-top:31px;padding-top:19px;color:#89958d;font-size:12px}
    @media (max-width:991px){
      .nav-shell{gap:15px}.nav-group{gap:15px}.nav-link{font-size:13px}
      .browse-layout,.topic-layout{grid-template-columns:1fr}
      .filter-panel{position:static}
      .route-grid{grid-template-columns:1fr 1fr}
      .feedback-panel{grid-template-columns:1fr;gap:25px}
    }
    @media (max-width:767px){
      .container{padding-left:17px;padding-right:17px}
      .nav-shell{min-height:68px;display:flex;justify-content:space-between}
      .nav-group{display:none}.brand{font-size:16px}.brand-mark{width:27px;height:27px;border-width:6px}
      .menu-toggle{display:block}
      .hero{padding:62px 0 52px}.hero h1{font-size:43px}.hero-copy{font-size:16px}
      .hero-board{grid-template-columns:1fr 1fr}.board-item{border-bottom:1px solid #58615c}.board-item:nth-child(2){border-right:0}
      section{padding:62px 0}.section-head{display:block;margin-bottom:25px}.section-head p{margin-top:14px}
      .browse-card{grid-template-columns:42px 1fr;gap:12px;padding:18px}.browse-card .text-link{grid-column:2}
      .topic-card.featured{min-height:260px}.route-grid{grid-template-columns:1fr}
      .feedback-panel{padding:28px 21px}.footer-top{display:block}.footer-links{margin-top:25px;gap:15px}
    }
    @media (max-width:520px){
      .hero h1{font-size:37px}.hero-actions a{width:100%}.hero-chip{width:100%}
      .board-item{padding:14px}.board-item strong{font-size:23px}
      .filter-panel{padding:19px}.topic-card{padding:24px}
    }