/* roulang page: index */
:root{
            --ink:#172033;
            --muted:#687386;
            --soft:#f4f7fb;
            --line:#e4e9f1;
            --paper:#ffffff;
            --navy:#10213f;
            --blue:#2864f0;
            --cyan:#21b7c9;
            --green:#18a57b;
            --orange:#f29c38;
            --danger:#c84f58;
            --radius:18px;
            --shadow:0 18px 50px rgba(24,45,82,.10);
            --shadow-sm:0 8px 24px rgba(24,45,82,.08);
            --container:min(1180px, calc(100% - 40px));
        }
        *,*::before,*::after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7;font-size:15px}
        img{display:block;width:100%;height:auto}
        a{color:inherit;text-decoration:none}
        button,input,textarea{font:inherit}
        button{cursor:pointer}
        :focus-visible{outline:3px solid rgba(40,100,240,.32);outline-offset:3px}
        .container{width:var(--container);margin:0 auto}
        .topline{height:4px;background:linear-gradient(90deg,var(--blue),var(--cyan),var(--green))}
        .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);border-bottom:1px solid rgba(228,233,241,.9)}
        .nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
        .brand{display:flex;align-items:center;gap:12px;min-width:260px}
        .brand-mark{width:38px;height:38px;display:grid;place-items:center;border-radius:11px;color:#fff;font-size:18px;font-weight:800;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 8px 18px rgba(40,100,240,.24)}
        .brand-name{font-size:16px;font-weight:800;letter-spacing:0;color:var(--navy)}
        .nav-links{display:flex;align-items:center;gap:6px}
        .nav-links a{padding:10px 13px;color:var(--muted);font-weight:600;border-radius:10px;transition:.2s}
        .nav-links a:hover,.nav-links a.active{color:var(--blue);background:#edf4ff}
        .nav-action{padding:11px 17px!important;color:#fff!important;background:var(--navy)!important}
        .nav-action:hover{background:var(--blue)!important}
        .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;width:42px;height:42px;color:var(--navy)}
        .hero{position:relative;overflow:hidden;background:#f4f8ff;padding:78px 0 72px}
        .hero::after{content:"";position:absolute;right:-160px;top:-180px;width:520px;height:520px;border-radius:50%;border:80px solid rgba(40,100,240,.07);pointer-events:none}
        .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center;position:relative;z-index:1}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em;margin-bottom:16px}
        .eyebrow::before{content:"";width:24px;height:2px;background:var(--cyan)}
        h1{font-size:clamp(34px,4vw,58px);line-height:1.14;letter-spacing:0;margin:0 0 22px;color:var(--navy);max-width:700px}
        h1 em{font-style:normal;color:var(--blue)}
        .hero-lead{font-size:18px;line-height:1.9;color:#536176;max-width:680px;margin:0 0 28px}
        .button-row{display:flex;flex-wrap:wrap;gap:12px}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border:1px solid transparent;border-radius:11px;font-weight:800;transition:transform .2s,box-shadow .2s,background .2s}
        .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}
        .btn-primary{color:#fff;background:var(--blue)}
        .btn-primary:hover{background:#1d51ca}
        .btn-light{color:var(--navy);background:#fff;border-color:var(--line)}
        .hero-panel{background:var(--navy);border-radius:22px;padding:25px;color:#fff;box-shadow:0 24px 55px rgba(16,33,63,.22)}
        .panel-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(255,255,255,.14);padding-bottom:18px;margin-bottom:20px}
        .panel-label{font-size:13px;color:#b9c8e7}
        .status-dot{display:inline-flex;align-items:center;gap:7px;color:#6fe0bb;font-size:12px;font-weight:800}
        .status-dot::before{content:"";width:8px;height:8px;border-radius:50%;background:#6fe0bb;box-shadow:0 0 0 4px rgba(111,224,187,.13)}
        .code-lines{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:13px;line-height:2;background:#0a172e;border-radius:13px;padding:18px;color:#d8e5ff}
        .code-lines span{color:#6fe0bb}.code-lines b{color:#83b3ff}.code-lines i{color:#f6c76a;font-style:normal}
        .panel-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
        .panel-stat{padding:13px 10px;border:1px solid rgba(255,255,255,.12);border-radius:12px}
        .panel-stat strong{display:block;font-size:20px}.panel-stat small{color:#aebbd4}
        section{padding:78px 0}
        .section-alt{background:var(--soft)}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
        .section-head h2{font-size:30px;line-height:1.25;margin:0;color:var(--navy)}
        .section-head p{max-width:610px;color:var(--muted);margin:0}
        .section-kicker{font-size:12px;letter-spacing:.1em;color:var(--blue);font-weight:800;margin-bottom:8px}
        .notice{padding:25px 0;background:#fff8eb;border-bottom:1px solid #f8e3bc}
        .notice-inner{display:flex;align-items:center;justify-content:space-between;gap:25px}
        .notice strong{color:#8b5a13}.notice p{margin:3px 0 0;color:#866b3c}
        .notice-badge{white-space:nowrap;color:#8b5a13;border:1px solid #edcc91;padding:8px 13px;border-radius:20px;font-weight:800;font-size:13px}
        .three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .feature{padding:26px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);transition:.22s}
        .feature:hover,.content-card:hover,.rank-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
        .feature-icon{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;background:#eaf2ff;color:var(--blue);font-weight:900;font-size:19px;margin-bottom:18px}
        .feature:nth-child(2) .feature-icon{background:#e8fbf5;color:var(--green)}
        .feature:nth-child(3) .feature-icon{background:#fff1df;color:#d47b13}
        .feature h3,.content-card h3{margin:0 0 9px;font-size:18px;color:var(--navy)}
        .feature p,.content-card p{margin:0;color:var(--muted);font-size:14px}
        .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
        .step{padding:25px 24px 10px 0;position:relative}
        .step:not(:last-child)::after{content:"→";position:absolute;right:20px;top:31px;color:#a5b5ce;font-size:22px}
        .step-num{font-size:13px;color:var(--blue);font-weight:900;margin-bottom:14px}
        .step h3{margin:0 0 8px;font-size:17px}.step p{color:var(--muted);font-size:14px;margin:0}
        .content-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:17px}
        .content-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:15px;transition:.22s}
        .content-card img{height:145px;object-fit:cover}
        .content-body{padding:16px}
        .card-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:9px}
        .badge{display:inline-flex;padding:4px 8px;border-radius:6px;color:var(--blue);background:#edf4ff;font-size:11px;font-weight:900}
        .badge.green{color:var(--green);background:#e9faf4}.badge.orange{color:#c67813;background:#fff2dd}
        .score{font-weight:900;color:var(--orange);font-size:13px}
        .category-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
        .category{padding:21px;border:1px solid var(--line);border-radius:14px;background:#fff}
        .category h3{margin:0 0 8px;font-size:16px;color:var(--navy)}.category p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
        .rank-layout{display:grid;grid-template-columns:1fr 1fr;gap:22px}
        .rank-list{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
        .rank-item{display:grid;grid-template-columns:38px 1fr auto auto;align-items:center;gap:13px;padding:15px 18px;border-bottom:1px solid var(--line);transition:.2s}
        .rank-item:last-child{border-bottom:0}.rank-no{font-weight:900;color:#a2afc3;font-size:17px}.rank-item:nth-child(-n+3) .rank-no{color:var(--blue)}
        .rank-name{font-weight:700;color:var(--navy)}.rank-type{font-size:11px;color:var(--muted);border:1px solid var(--line);padding:3px 7px;border-radius:5px}.hot{color:var(--orange);font-size:12px;font-weight:800}
        .news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .news-item{display:flex;gap:14px;padding:16px;border:1px solid var(--line);border-radius:14px;background:#fff}
        .news-item img{width:96px;height:76px;object-fit:cover;border-radius:9px;flex:none}.news-item h3{font-size:15px;line-height:1.45;margin:0 0 7px}.news-item time{font-size:12px;color:#9aa5b6}
        .compare{display:grid;grid-template-columns:1fr 1fr;gap:20px}.compare-box{padding:27px;border-radius:16px;border:1px solid var(--line);background:#fff}.compare-box.good{border-color:#b9e8d7;background:#f4fffb}.compare-box h3{margin:0 0 16px;color:var(--navy)}.compare-box ul{list-style:none;padding:0;margin:0}.compare-box li{padding:9px 0;border-bottom:1px solid var(--line);color:var(--muted)}.compare-box li:last-child{border:0}.compare-box li::before{content:"✓";color:var(--green);font-weight:900;margin-right:9px}
        .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.faq{padding:20px 22px;background:#fff;border:1px solid var(--line);border-radius:13px}.faq h3{font-size:16px;margin:0 0 8px;color:var(--navy)}.faq p{margin:0;color:var(--muted);font-size:14px}
        .cta-section{background:var(--navy);color:#fff}.cta-wrap{display:flex;justify-content:space-between;align-items:center;gap:30px}.cta-wrap h2{font-size:30px;line-height:1.3;margin:0 0 10px}.cta-wrap p{margin:0;color:#b9c8e7;max-width:650px}.cta-form{display:flex;gap:9px;min-width:380px}.cta-form input{min-width:0;flex:1;height:47px;border:0;border-radius:10px;padding:0 15px;color:var(--ink)}.cta-form .btn{height:47px}
        footer{background:#0a172e;color:#aebbd4;padding:50px 0 22px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px;padding-bottom:35px}.footer-brand{color:#fff;font-weight:800;font-size:17px;margin-bottom:12px}.footer-col h3{color:#fff;font-size:14px;margin:0 0 13px}.footer-col a{display:block;color:#aebbd4;font-size:13px;margin:8px 0}.footer-col a:hover{color:#fff}.footer-note{font-size:13px;max-width:300px;margin:0}.copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;font-size:12px;color:#8190aa}
        @media (max-width:1024px){.hero-grid{gap:35px}.content-grid{grid-template-columns:repeat(3,1fr)}.category-grid{grid-template-columns:repeat(3,1fr)}.nav-links a{padding:9px 8px}.brand{min-width:230px}}
        @media (max-width:768px){:root{--container:min(100% - 32px,620px)}.nav-wrap{height:68px}.brand{min-width:auto}.brand-name{font-size:14px}.menu-toggle{display:block}.nav-links{display:none;position:absolute;left:16px;right:16px;top:76px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.nav-links a{padding:12px 14px}.nav-action{text-align:center}.hero{padding:55px 0}.hero-grid{grid-template-columns:1fr}.hero-panel{max-width:600px}.three-grid,.news-list,.faq-grid{grid-template-columns:1fr}.steps{grid-template-columns:1fr 1fr;gap:10px}.step{padding-right:15px}.step:not(:last-child)::after{display:none}.content-grid{grid-template-columns:repeat(2,1fr)}.rank-layout,.compare{grid-template-columns:1fr}.cta-wrap{display:block}.cta-form{margin-top:25px;min-width:0}.footer-grid{grid-template-columns:1fr 1fr}}
        @media (max-width:520px){body{font-size:14px}.container{width:calc(100% - 28px)}h1{font-size:36px}.hero-lead{font-size:16px}.section-head{display:block}.section-head p{margin-top:12px}.content-grid,.category-grid{grid-template-columns:1fr}.panel-stats{grid-template-columns:1fr 1fr}.panel-stat:last-child{grid-column:span 2}.steps{grid-template-columns:1fr}.cta-form{display:block}.cta-form input,.cta-form .btn{width:100%}.cta-form .btn{margin-top:9px}.footer-grid{grid-template-columns:1fr}.notice-inner{display:block}.notice-badge{display:inline-flex;margin-top:12px}.rank-item{grid-template-columns:30px 1fr auto}.rank-type{display:none}}