/* roulang page: index */
:root{
            --ink:#17263d;
            --muted:#65748b;
            --blue:#1769d2;
            --blue-deep:#0c3d83;
            --sky:#eaf3ff;
            --cyan:#39b9c8;
            --paper:#ffffff;
            --soft:#f5f8fc;
            --line:#dce6f2;
            --gold:#e7ae48;
            --radius:20px;
            --shadow:0 18px 50px rgba(25,64,112,.10);
            --shadow-sm:0 8px 24px rgba(25,64,112,.08);
        }
        *,*::before,*::after{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--paper);
            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:all .25s ease}
        img{display:block;max-width:100%;height:auto}
        button,input{font:inherit}
        button:focus,input:focus,a:focus{outline:3px solid rgba(23,105,210,.24);outline-offset:3px}
        .container{width:min(1160px,calc(100% - 40px));margin:0 auto}
        .site-header{
            position:sticky;top:0;z-index:20;
            background:rgba(255,255,255,.94);
            backdrop-filter:blur(16px);
            border-bottom:1px solid rgba(220,230,242,.8);
        }
        .nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
        .brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:20px;letter-spacing:-.04em}
        .brand-mark{
            width:38px;height:38px;border-radius:12px;background:var(--blue);
            display:grid;place-items:center;color:#fff;font-size:17px;box-shadow:0 8px 18px rgba(23,105,210,.25)
        }
        .desktop-nav{display:flex;align-items:center;gap:28px;margin-left:auto}
        .desktop-nav a{font-size:15px;color:var(--muted);font-weight:600}
        .desktop-nav a:hover,.desktop-nav a.active{color:var(--blue)}
        .nav-action{padding:10px 17px;border:1px solid var(--line);border-radius:12px;color:var(--blue)!important;background:#fff}
        .menu-toggle{display:none;border:0;background:none;color:var(--ink);font-size:25px;cursor:pointer}
        .hero{
            position:relative;overflow:hidden;background:linear-gradient(135deg,#f7fbff 0%,#eaf3ff 58%,#f8fcff 100%);
            padding:86px 0 76px;border-bottom:1px solid var(--line)
        }
        .hero::before,.hero::after{content:"";position:absolute;border-radius:50%;pointer-events:none}
        .hero::before{width:420px;height:420px;background:rgba(57,185,200,.12);right:-120px;top:-170px}
        .hero::after{width:220px;height:220px;background:rgba(231,174,72,.10);left:-100px;bottom:-100px}
        .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.08fr .92fr;gap:70px;align-items:center}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:800;font-size:13px;letter-spacing:.08em;margin-bottom:16px}
        .eyebrow::before{content:"";width:24px;height:2px;background:var(--cyan)}
        h1{font-size:clamp(38px,5vw,66px);line-height:1.14;letter-spacing:-.065em;margin:0 0 22px;max-width:720px}
        .hero-copy{font-size:18px;color:#52647e;max-width:650px;margin:0 0 28px}
        .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:32px}
        .button{border-radius:12px;padding:13px 21px;font-weight:750;line-height:1.4;margin:0;transition:transform .25s,box-shadow .25s,background .25s}
        .button.primary{background:var(--blue);color:#fff;box-shadow:0 10px 22px rgba(23,105,210,.24)}
        .button.primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:0 14px 28px rgba(23,105,210,.3)}
        .button.ghost{background:#fff;border:1px solid var(--line);color:var(--ink)}
        .button.ghost:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-2px)}
        .hero-notes{display:flex;flex-wrap:wrap;gap:20px;color:var(--muted);font-size:14px}
        .hero-notes strong{display:block;color:var(--ink);font-size:20px;line-height:1.2}
        .trial-panel{background:#fff;border:1px solid rgba(220,230,242,.95);border-radius:24px;padding:28px;box-shadow:var(--shadow);position:relative}
        .panel-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px}
        .panel-title{font-weight:800;font-size:18px}
        .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#e8f8f5;color:#168b76;font-size:12px;font-weight:800}
        .trial-panel h2{font-size:29px;line-height:1.3;margin:0 0 12px;letter-spacing:-.04em}
        .trial-panel p{color:var(--muted);font-size:14px;margin:0 0 21px}
        .benefit-list{list-style:none;margin:0 0 24px;padding:0;border-top:1px solid var(--line)}
        .benefit-list li{display:flex;gap:10px;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px}
        .benefit-list li::before{content:"✓";color:var(--blue);font-weight:900}
        .qualify{font-size:12px!important;margin:13px 0 0!important;color:#7d8a9d!important}
        .section{padding:88px 0}
        .section.soft{background:var(--soft)}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:35px}
        .section-kicker{font-size:13px;color:var(--blue);font-weight:800;letter-spacing:.1em;text-transform:uppercase;margin-bottom:7px}
        h2{font-size:clamp(29px,3vw,42px);line-height:1.25;letter-spacing:-.05em;margin:0}
        .section-intro{max-width:510px;color:var(--muted);margin:0}
        .pain-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
        .pain-card{padding:30px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
        .pain-card.highlight{background:#102e59;color:#fff;border-color:#102e59}
        .number{font-size:14px;color:var(--cyan);font-weight:900;margin-bottom:20px}
        .pain-card h3{font-size:23px;margin:0 0 10px}
        .pain-card p{color:var(--muted);margin:0}
        .pain-card.highlight p{color:#c6d7ee}
        .step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .step{padding:25px 23px;border-left:3px solid var(--blue);background:#fff;border-radius:0 16px 16px 0;box-shadow:var(--shadow-sm)}
        .step-index{font-size:31px;font-weight:900;color:#c4d8f3;line-height:1;margin-bottom:19px}
        .step h3{font-size:19px;margin:0 0 8px}
        .step p{color:var(--muted);font-size:14px;margin:0}
        .stage{display:grid;grid-template-columns:.85fr 1.15fr;gap:55px;align-items:center}
        .stage-copy p{color:var(--muted);margin:18px 0 24px}
        .stage-points{list-style:none;padding:0;margin:0}
        .stage-points li{display:flex;gap:12px;margin:13px 0;font-weight:650}
        .stage-points span{width:25px;height:25px;display:grid;place-items:center;border-radius:8px;background:var(--sky);color:var(--blue);font-size:13px}
        .interface{background:#122d52;border-radius:25px;padding:17px;box-shadow:var(--shadow);transform:rotate(1deg)}
        .interface-bar{height:34px;display:flex;gap:7px;align-items:center;padding:0 9px}
        .interface-bar i{display:block;width:8px;height:8px;border-radius:50%;background:#6e8daf}
        .interface-body{background:#f4f8fd;border-radius:15px;padding:22px;min-height:280px}
        .interface-label{font-size:12px;color:var(--blue);font-weight:800}
        .interface-body h3{margin:9px 0 19px;font-size:24px}
        .interface-row{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:10px}
        .interface-block{height:70px;border-radius:12px;background:#dceafa;padding:12px}
        .interface-block.dark{background:#b6d9df}
        .interface-block small{font-size:11px;color:#4d6785}
        .interface-block strong{display:block;margin-top:5px;font-size:14px}
        .progress-area{display:grid;grid-template-columns:1fr 1fr;gap:26px}
        .progress-card,.quote-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:29px;box-shadow:var(--shadow-sm)}
        .progress-card h3,.quote-card h3{margin:0 0 9px;font-size:22px}
        .progress-card p,.quote-card p{color:var(--muted);margin:0 0 22px}
        .meter{height:10px;background:#e6eef8;border-radius:99px;overflow:hidden;margin:18px 0 10px}
        .meter span{display:block;height:100%;width:72%;background:linear-gradient(90deg,var(--blue),var(--cyan));border-radius:99px}
        .meter-line{display:flex;justify-content:space-between;color:var(--muted);font-size:13px}
        .quote-mark{font-size:48px;line-height:.8;color:var(--gold);font-family:Georgia,serif}
        .quote-card cite{font-style:normal;font-weight:750;color:var(--ink);font-size:14px}
        .category-row{display:flex;flex-wrap:wrap;gap:12px}
        .category{padding:15px 19px;background:#fff;border:1px solid var(--line);border-radius:14px;color:var(--ink);font-weight:700;box-shadow:var(--shadow-sm)}
        .category:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-2px)}
        .news-layout{display:grid;grid-template-columns:1.35fr .65fr;gap:25px}
        .news-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
        .news-item{display:flex;justify-content:space-between;gap:20px;padding:20px 24px;border-bottom:1px solid var(--line)}
        .news-item:last-child{border-bottom:0}
        .news-item:hover{background:#f8fbff}
        .news-item h3{font-size:17px;margin:0 0 4px}
        .news-item p{font-size:13px;color:var(--muted);margin:0}
        .news-date{white-space:nowrap;color:#91a0b4;font-size:12px}
        .recommend{background:#102e59;color:#fff;border-radius:var(--radius);padding:27px}
        .recommend h3{font-size:22px;margin:0 0 12px}
        .recommend p{color:#c4d5ea;font-size:14px;margin:0 0 20px}
        .recommend .button.ghost{background:transparent;border-color:#55749d;color:#fff}
        .start{background:linear-gradient(115deg,#0e386e,#1769d2);color:#fff;border-radius:28px;padding:55px 65px;display:flex;justify-content:space-between;align-items:center;gap:40px;box-shadow:var(--shadow)}
        .start h2{max-width:620px}
        .start p{color:#d4e3f5;max-width:620px;margin:15px 0 0}
        .start .button.primary{background:#fff;color:var(--blue);box-shadow:none;white-space:nowrap}
        .start .button.primary:hover{background:#f1f7ff}
        .site-footer{background:#0d203b;color:#c5d4e7;padding:43px 0 24px}
        .footer-top{display:flex;justify-content:space-between;gap:40px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.12)}
        .footer-brand{color:#fff;font-size:20px;font-weight:800}
        .footer-note{max-width:500px;font-size:13px;line-height:1.8;margin:9px 0 0;color:#9eb2ca}
        .footer-links{display:flex;gap:22px;align-items:start}
        .footer-links a{font-size:13px;color:#d8e5f3}
        .footer-links a:hover{color:#fff}
        .copyright{font-size:12px;color:#8197b2;padding-top:20px}
        @media(max-width:900px){
            .hero-grid,.stage{grid-template-columns:1fr;gap:38px}
            .hero{padding:65px 0}
            .trial-panel{max-width:620px}
            .news-layout{grid-template-columns:1fr}
            .start{padding:42px}
        }
        @media(max-width:700px){
            .container{width:min(100% - 28px,1160px)}
            .desktop-nav{display:none;position:absolute;top:76px;left:14px;right:14px;background:#fff;padding:18px;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow-sm);flex-direction:column;align-items:stretch;gap:14px}
            .desktop-nav.open{display:flex}
            .menu-toggle{display:block}
            .nav-action{text-align:center}
            .section{padding:62px 0}
            .section-head{display:block;margin-bottom:25px}
            .section-intro{margin-top:12px}
            .pain-grid,.progress-area{grid-template-columns:1fr}
            .step-grid{grid-template-columns:1fr}
            h1{font-size:41px}
            .hero-copy{font-size:16px}
            .start{display:block;padding:33px 25px}
            .start .button{margin-top:24px}
            .footer-top{display:block}
            .footer-links{margin-top:22px;flex-wrap:wrap}
        }
        @media(max-width:480px){
            .hero-actions .button{width:100%;text-align:center}
            .hero-notes{gap:14px}
            .trial-panel{padding:22px}
            .interface{padding:10px}
            .interface-body{padding:16px;min-height:240px}
            .interface-row{gap:6px}
            .interface-block{height:62px;padding:8px}
            .news-item{padding:17px;display:block}
            .news-date{display:block;margin-top:8px}
        }