/* roulang page: index */
:root{
            --ink:#171923;
            --muted:#737887;
            --paper:#fbfaf8;
            --panel:#ffffff;
            --line:#e8e6e2;
            --violet:#6d4aff;
            --violet-dark:#4b31c9;
            --coral:#f26b5e;
            --mint:#d9f3e7;
            --gold:#f6c86d;
            --shadow:0 18px 50px rgba(28,24,48,.09);
            --soft-shadow:0 8px 24px rgba(28,24,48,.07);
            --radius:22px;
            --small-radius:12px;
            --max:1180px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--paper);
            font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
            line-height:1.7;
            font-size:15px;
        }
        a{color:inherit;text-decoration:none}
        img{display:block;width:100%;object-fit:cover}
        button,input{font:inherit}
        button{cursor:pointer}
        .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
        .eyebrow{
            display:inline-flex;
            align-items:center;
            gap:8px;
            color:var(--violet-dark);
            font-size:12px;
            font-weight:800;
            letter-spacing:.08em;
            text-transform:uppercase;
        }
        .eyebrow::before{content:"";width:24px;height:3px;background:var(--coral);border-radius:99px}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}
        .section-head h2{font-size:clamp(25px,3vw,38px);line-height:1.25;margin:8px 0 0;letter-spacing:-.02em}
        .section-head p{max-width:490px;margin:0;color:var(--muted)}
        .site-header{
            position:sticky;top:0;z-index:20;
            background:rgba(251,250,248,.9);
            backdrop-filter:blur(16px);
            border-bottom:1px solid rgba(232,230,226,.8);
        }
        .nav-wrap{height:76px;display:flex;align-items:center;gap:30px}
        .brand{display:flex;align-items:center;gap:12px;min-width:max-content;font-weight:900}
        .brand-mark{
            width:38px;height:38px;border-radius:12px;
            background:linear-gradient(135deg,var(--violet),var(--coral));
            color:#fff;display:grid;place-items:center;font-weight:900;
            box-shadow:0 8px 18px rgba(109,74,255,.25)
        }
        .brand-name{font-size:15px;max-width:180px;line-height:1.25}
        .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
        .main-nav a{padding:9px 13px;border-radius:10px;color:var(--muted);font-size:14px;transition:.2s ease}
        .main-nav a:hover,.main-nav a.active{color:var(--violet-dark);background:#efebff}
        .nav-action{display:inline-flex;align-items:center;gap:8px;padding:11px 16px;background:var(--ink);color:#fff;border-radius:12px;font-weight:700;transition:.2s ease}
        .nav-action:hover{background:var(--violet);transform:translateY(-2px)}
        .menu-toggle{display:none;border:0;background:none;font-size:24px;color:var(--ink)}
        .hero{
            padding:78px 0 64px;
            background:
                linear-gradient(90deg,rgba(251,250,248,.98) 0%,rgba(251,250,248,.9) 42%,rgba(251,250,248,.18) 100%),
                url("https://images.unsplash.com/photo-1518998053901-5348d3961a04?auto=format&fit=crop&w=1800&q=85") center/cover;
            min-height:560px;
            display:flex;align-items:center;
        }
        .hero-content{max-width:650px}
        .hero h1{font-size:clamp(38px,6vw,72px);line-height:1.08;letter-spacing:-.045em;margin:20px 0 22px}
        .hero h1 em{font-style:normal;color:var(--violet)}
        .hero-lead{font-size:18px;color:#4e5260;max-width:620px;margin:0 0 28px}
        .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid transparent;border-radius:13px;padding:13px 20px;font-weight:800;transition:.2s ease}
        .btn-primary{background:var(--violet);color:#fff;box-shadow:0 10px 22px rgba(109,74,255,.24)}
        .btn-primary:hover{background:var(--violet-dark);transform:translateY(-2px)}
        .btn-light{background:#fff;border-color:var(--line);color:var(--ink)}
        .btn-light:hover{border-color:var(--violet);color:var(--violet)}
        .hero-stats{display:flex;flex-wrap:wrap;gap:28px}
        .stat strong{display:block;font-size:24px;line-height:1.2}
        .stat span{color:var(--muted);font-size:12px}
        section{padding:84px 0}
        .section-tint{background:#f2f0ff}
        .section-dark{background:#1a1b27;color:#fff}
        .section-dark .section-head p{color:#aaaebe}
        .countdown-bar{padding:18px 0;background:#211d3c;color:#fff}
        .countdown-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
        .countdown-label{display:flex;align-items:center;gap:12px;font-weight:800}
        .pulse{width:9px;height:9px;background:var(--coral);border-radius:50%;box-shadow:0 0 0 7px rgba(242,107,94,.14)}
        .timer{display:flex;gap:9px;align-items:center}
        .timer b{display:inline-grid;place-items:center;min-width:42px;height:36px;border-radius:8px;background:rgba(255,255,255,.1);font-size:17px}
        .timer small{color:#b9b5ce}
        .feature-grid{display:grid;grid-template-columns:1.25fr .85fr .85fr;gap:18px}
        .feature-card{min-height:250px;border-radius:var(--radius);padding:28px;position:relative;overflow:hidden;box-shadow:var(--soft-shadow);background:#fff}
        .feature-card.large{background:linear-gradient(135deg,#6450e8,#a996ff);color:#fff}
        .feature-card.mint{background:var(--mint)}
        .feature-card.coral{background:#ffe0d8}
        .feature-card h3{font-size:23px;line-height:1.3;margin:12px 0}
        .feature-card p{margin:0;color:rgba(23,25,35,.68);max-width:340px}
        .feature-card.large p{color:rgba(255,255,255,.82)}
        .feature-icon{font-size:28px}
        .feature-number{position:absolute;right:24px;bottom:14px;font-size:70px;font-weight:900;opacity:.12}
        .benefit-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
        .benefit{border:1px solid var(--line);background:#fff;border-radius:16px;padding:22px;transition:.2s ease}
        .benefit:hover{transform:translateY(-4px);box-shadow:var(--soft-shadow);border-color:#cfc5ff}
        .benefit b{display:block;font-size:16px;margin:12px 0 6px}
        .benefit p{margin:0;color:var(--muted);font-size:13px}
        .badge{display:inline-flex;align-items:center;padding:5px 9px;border-radius:99px;font-size:11px;font-weight:800;background:#efebff;color:var(--violet-dark)}
        .badge.red{background:#ffe3df;color:#b54337}
        .badge.green{background:#e0f5e8;color:#23734b}
        .route{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
        .route-step{position:relative;padding:26px 24px 12px 0}
        .route-step:not(:last-child)::after{content:"→";position:absolute;right:16px;top:28px;font-size:24px;color:var(--coral)}
        .route-step .num{font-size:12px;color:var(--coral);font-weight:900}
        .route-step h3{font-size:17px;margin:9px 0 6px}
        .route-step p{color:var(--muted);font-size:13px;margin:0}
        .reward-wrap{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:stretch}
        .reward-panel{border-radius:var(--radius);padding:34px;background:#fff;border:1px solid var(--line)}
        .reward-panel.highlight{background:linear-gradient(135deg,#30245d,#5c48bc);color:#fff;border:0}
        .reward-panel h3{font-size:24px;margin:10px 0}
        .reward-panel p{color:var(--muted);margin:0 0 18px}
        .highlight p{color:#d6d1ee}
        .reward-list{display:grid;gap:12px;margin-top:22px}
        .reward-list div{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:10px}
        .highlight .reward-list div{border-color:rgba(255,255,255,.16)}
        .content-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
        .content-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:.2s ease}
        .content-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
        .thumb{height:174px;position:relative;overflow:hidden}
        .thumb img{height:100%;transition:.35s ease}
        .content-card:hover .thumb img{transform:scale(1.05)}
        .thumb .badge{position:absolute;left:12px;top:12px}
        .card-body{padding:16px}
        .card-body h3{font-size:16px;margin:0 0 7px;line-height:1.4}
        .card-body p{font-size:12px;color:var(--muted);margin:0 0 12px}
        .card-meta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px}
        .rating{color:#d18d22;font-weight:800}
        .topic-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
        .topic{min-height:160px;padding:22px;border-radius:18px;background:#fff;border:1px solid var(--line);transition:.2s}
        .topic:hover{background:#efebff;border-color:#cfc5ff}
        .topic h3{margin:0 0 8px;font-size:17px}
        .topic p{margin:0;color:var(--muted);font-size:13px}
        .rank-layout{display:grid;grid-template-columns:1fr .8fr;gap:22px}
        .rank-list{background:#fff;border-radius:20px;border:1px solid var(--line);overflow:hidden}
        .rank-row{display:grid;grid-template-columns:48px 1fr 90px 70px;align-items:center;gap:15px;padding:15px 20px;border-bottom:1px solid var(--line)}
        .rank-row:last-child{border-bottom:0}
        .rank-no{font-size:21px;font-weight:900;color:#c8c8cd}
        .rank-row:nth-child(-n+3) .rank-no{color:var(--coral)}
        .rank-title{font-weight:800}
        .rank-sub{display:block;font-size:12px;color:var(--muted);font-weight:400}
        .heat{color:var(--coral);font-size:12px;font-weight:800}
        .score{text-align:right;font-weight:900;color:var(--violet-dark)}
        .quote-panel{background:#e7f4ee;border-radius:20px;padding:34px;display:flex;flex-direction:column;justify-content:center}
        .quote-panel blockquote{font-size:23px;line-height:1.5;margin:15px 0 22px;font-weight:800}
        .quote-panel cite{font-style:normal;color:var(--muted);font-size:13px}
        .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .news-item{display:grid;grid-template-columns:125px 1fr;gap:15px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:16px}
        .news-item img{height:100px;border-radius:10px}
        .news-item h3{font-size:15px;line-height:1.45;margin:4px 0 8px}
        .news-item time{font-size:12px;color:var(--muted)}
        .assurance{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
        .assurance-item{padding:20px;border-left:3px solid var(--violet);background:rgba(255,255,255,.06)}
        .assurance-item strong{display:block;margin-bottom:6px}
        .assurance-item span{display:block;color:#b4b6c6;font-size:13px}
        .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
        details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:19px 22px}
        summary{cursor:pointer;font-weight:800;list-style:none;display:flex;justify-content:space-between;gap:20px}
        summary::-webkit-details-marker{display:none}
        summary::after{content:"+";color:var(--violet);font-size:20px;line-height:1}
        details[open] summary::after{content:"−"}
        details p{color:var(--muted);margin:14px 0 0;font-size:14px}
        .signup{padding:66px 0;background:linear-gradient(110deg,#efebff,#fff0eb)}
        .signup-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
        .signup h2{font-size:34px;line-height:1.25;margin:8px 0 12px}
        .signup p{color:var(--muted);max-width:600px;margin:0}
        .signup-form{display:flex;gap:8px;min-width:360px}
        .signup-form input{min-width:0;flex:1;border:1px solid var(--line);border-radius:12px;padding:13px 15px;outline:none}
        .signup-form input:focus{border-color:var(--violet);box-shadow:0 0 0 3px rgba(109,74,255,.12)}
        footer{background:#171923;color:#fff;padding:58px 0 24px}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;padding-bottom:40px}
        footer .brand-name{color:#fff}
        .footer-intro{color:#a8abb8;max-width:280px;font-size:13px}
        footer h3{font-size:14px;margin:0 0 15px}
        footer a{display:block;color:#a8abb8;font-size:13px;margin:8px 0;transition:.2s}
        footer a:hover{color:#fff}
        .copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;color:#858998;font-size:12px;display:flex;justify-content:space-between;gap:15px}
        :focus-visible{outline:3px solid rgba(109,74,255,.4);outline-offset:3px}
        @media (max-width:1024px){
            .feature-grid{grid-template-columns:1fr 1fr}
            .feature-card.large{grid-row:span 2}
            .content-grid{grid-template-columns:repeat(3,1fr)}
            .topic-grid{grid-template-columns:repeat(3,1fr)}
            .benefit-grid,.assurance{grid-template-columns:repeat(2,1fr)}
        }
        @media (max-width:768px){
            .container{width:min(var(--max),calc(100% - 32px))}
            .main-nav{display:none;position:absolute;left:16px;right:16px;top:68px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .main-nav.open{display:flex}
            .main-nav a{padding:12px 14px}
            .nav-action{display:none}
            .menu-toggle{display:block;margin-left:auto}
            .hero{min-height:620px;padding:56px 0;background-position:63% center}
            .hero-content{max-width:590px}
            .hero h1{font-size:45px}
            .section-head{display:block}
            .section-head p{margin-top:12px}
            section{padding:62px 0}
            .countdown-inner{align-items:flex-start;flex-direction:column;gap:12px}
            .feature-grid,.reward-wrap,.rank-layout{grid-template-columns:1fr}
            .feature-card.large{grid-row:auto}
            .content-grid{grid-template-columns:repeat(2,1fr)}
            .route{grid-template-columns:repeat(2,1fr);gap:15px}
            .route-step{border-top:1px solid var(--line);padding-top:18px}
            .route-step:not(:last-child)::after{display:none}
            .news-grid{grid-template-columns:1fr 1fr}
            .signup-inner{display:block}
            .signup-form{margin-top:24px;min-width:0}
            .footer-grid{grid-template-columns:1.5fr 1fr 1fr}
        }
        @media (max-width:520px){
            .brand-name{font-size:13px;max-width:150px}
            .hero h1{font-size:38px}
            .hero-lead{font-size:16px}
            .hero-actions .btn{width:100%}
            .hero-stats{gap:18px}
            .feature-grid,.benefit-grid,.content-grid,.topic-grid,.news-grid,.assurance,.faq-grid{grid-template-columns:1fr}
            .thumb{height:210px}
            .rank-row{grid-template-columns:34px 1fr 58px}
            .rank-row .score{display:none}
            .quote-panel blockquote{font-size:20px}
            .signup-form{display:block}
            .signup-form input,.signup-form button{width:100%;margin-bottom:9px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
            .footer-grid>div:first-child{grid-column:1/-1}
            .copyright{display:block}
            .copyright span{display:block;margin-top:7px}
        }