/* roulang page: index */
:root{
            --blue:#2266d6;
            --blue-dark:#174ba9;
            --blue-soft:#eaf2ff;
            --cyan:#dff6f5;
            --violet:#f0edff;
            --orange:#fff1df;
            --ink:#17243b;
            --muted:#65738a;
            --paper:#ffffff;
            --warm:#f7f9fc;
            --line:#dfe6f0;
            --radius:18px;
            --radius-sm:12px;
            --shadow:0 14px 38px rgba(32,67,117,.09);
            --shadow-hover:0 18px 42px rgba(32,67,117,.16);
            --ease:all .25s ease;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--warm);
            font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
            font-size:16px;
            line-height:1.75;
        }
        a{color:inherit;text-decoration:none;transition:var(--ease)}
        img{max-width:100%;display:block}
        button,input,select,textarea{font:inherit}
        .container{max-width:1180px;margin:0 auto;padding:0 24px}
        .site-header{
            position:sticky;top:0;z-index:20;
            background:rgba(255,255,255,.94);
            border-bottom:1px solid rgba(223,230,240,.9);
            box-shadow:0 4px 20px rgba(31,65,112,.05);
            backdrop-filter:blur(12px)
        }
        .topbar{min-height:76px;display:flex;align-items:center;justify-content:space-between}
        .brand{display:flex;align-items:center;gap:11px;font-size:21px;font-weight:800;color:var(--ink);letter-spacing:.02em}
        .brand-mark{
            width:36px;height:36px;border-radius:11px;background:var(--blue);
            color:#fff;display:grid;place-items:center;font-weight:800;box-shadow:0 7px 16px rgba(34,102,214,.25)
        }
        .nav-list{display:flex;align-items:center;gap:8px;margin:0}
        .nav-list a{display:block;padding:10px 14px;border-radius:10px;color:#526178;font-size:14px;font-weight:650}
        .nav-list a:hover,.nav-list a.active{color:var(--blue);background:var(--blue-soft)}
        .nav-list .nav-cta{background:var(--blue);color:#fff;margin-left:8px;padding-left:18px;padding-right:18px}
        .nav-list .nav-cta:hover{background:var(--blue-dark);color:#fff}
        .menu-icon{display:none;color:var(--blue)}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:800;font-size:13px;letter-spacing:.08em}
        .eyebrow:before{content:"";width:22px;height:2px;background:var(--blue)}
        h1,h2,h3{margin:0 0 16px;line-height:1.25;letter-spacing:-.025em}
        h1{font-size:clamp(34px,4.6vw,62px);max-width:720px}
        h2{font-size:clamp(28px,3.3vw,42px)}
        h3{font-size:20px}
        .section-head{max-width:700px;margin-bottom:38px}
        .section-head p{color:var(--muted);margin:0;max-width:680px}
        .hero{
            position:relative;overflow:hidden;padding:78px 0 62px;
            background:linear-gradient(110deg,#f7fbff 0%,#eef5ff 52%,#f8fbff 100%);
        }
        .hero:after{content:"";position:absolute;width:440px;height:440px;border-radius:50%;right:-160px;top:-170px;background:rgba(189,218,255,.35)}
        .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.08fr .92fr;gap:54px;align-items:center}
        .hero-copy p{font-size:17px;color:#58677d;max-width:690px;margin:22px 0 28px}
        .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
        .button{
            display:inline-flex;align-items:center;justify-content:center;min-height:48px;
            padding:0 21px;border-radius:10px;font-weight:750;border:1px solid transparent;transition:var(--ease)
        }
        .button.primary{background:var(--blue);color:#fff;box-shadow:0 9px 18px rgba(34,102,214,.2)}
        .button.primary:hover{background:var(--blue-dark);transform:translateY(-2px)}
        .button.secondary{background:#fff;color:var(--blue);border-color:#bdd1f4}
        .button.secondary:hover{border-color:var(--blue);background:var(--blue-soft)}
        .hero-panel{position:relative;min-height:372px;padding:22px;border:1px solid #d7e4f7;border-radius:24px;background:#fff;box-shadow:var(--shadow)}
        .hero-image{height:155px;border-radius:15px;overflow:hidden;position:relative;margin-bottom:18px;background:#dfeeff}
        .hero-image img{width:100%;height:100%;object-fit:cover;opacity:.83}
        .hero-image:after{content:"糖心APP";position:absolute;left:18px;bottom:14px;color:#fff;font-weight:800;font-size:22px;text-shadow:0 2px 9px rgba(0,0,0,.35)}
        .panel-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;font-weight:800}
        .status{display:inline-flex;align-items:center;gap:6px;color:#17865e;font-size:12px;font-weight:700}
        .status:before{content:"";width:7px;height:7px;border-radius:50%;background:#27b77a}
        .signal-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
        .signal{padding:14px;background:#f7faff;border:1px solid #e5edf8;border-radius:12px}
        .signal strong{display:block;color:var(--blue);font-size:24px;line-height:1.2}
        .signal span{color:var(--muted);font-size:13px}
        .kpi-strip{margin-top:42px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .kpi{padding:20px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 7px 20px rgba(32,67,117,.05)}
        .kpi strong{display:block;color:var(--blue);font-size:28px;line-height:1.2}
        .kpi span{font-size:13px;color:var(--muted)}
        section{padding:86px 0}
        .section-white{background:#fff}
        .matrix{display:grid;grid-template-columns:1.3fr .85fr .85fr;grid-template-rows:1fr 1fr;gap:16px}
        .feature-card{padding:28px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow);transition:var(--ease)}
        .feature-card:hover,.scene-card:hover,.info-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#b7cdf1}
        .feature-card.large{grid-row:span 2;background:linear-gradient(145deg,#edf5ff,#fff)}
        .feature-card .num{color:var(--blue);font-weight:800;font-size:13px;letter-spacing:.08em;margin-bottom:28px}
        .feature-card p,.scene-card p,.info-item p{color:var(--muted);font-size:14px;margin:0}
        .tag{display:inline-block;padding:4px 9px;border-radius:7px;background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:750;margin-bottom:15px}
        .scenes{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .scene-card{padding:23px 20px;background:#fff;border:1px solid var(--line);border-radius:14px;transition:var(--ease)}
        .scene-card:nth-child(2){background:var(--cyan)}
        .scene-card:nth-child(3){background:var(--violet)}
        .scene-card:nth-child(4){background:var(--orange)}
        .scene-icon{font-size:27px;margin-bottom:18px}
        .compare-wrap{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:stretch}
        .compare-card{padding:28px;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
        .compare-card.before{background:#fbfcfe}
        .compare-card.after{background:#eff6ff;border-color:#cbdcf7}
        .compare-card h3{display:flex;justify-content:space-between;align-items:center}
        .compare-card ul{margin:12px 0 0;padding:0;list-style:none}
        .compare-card li{padding:11px 0;border-bottom:1px solid var(--line);color:#5e6d83;font-size:14px}
        .compare-card li:last-child{border-bottom:0}
        .compare-card li:before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:#aab8ca;margin:0 10px 2px 0}
        .after li:before{background:var(--blue)}
        .timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}
        .timeline:before{content:"";position:absolute;top:24px;left:8%;right:8%;height:2px;background:#cbdaf1}
        .step{position:relative;text-align:center;padding:0 10px}
        .step-no{position:relative;z-index:1;width:48px;height:48px;margin:0 auto 18px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:800;box-shadow:0 0 0 8px #edf4ff}
        .step p{color:var(--muted);font-size:13px;margin:0}
        .news-layout{display:grid;grid-template-columns:1.45fr .75fr;gap:24px}
        .news-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
        .info-item{display:grid;grid-template-columns:78px 1fr auto;gap:18px;align-items:center;padding:20px 24px;border-bottom:1px solid var(--line);transition:var(--ease)}
        .info-item:last-child{border-bottom:0}
        .date{font-size:13px;color:var(--blue);font-weight:800}
        .info-item h3{font-size:17px;margin:0 0 4px}
        .arrow{font-size:22px;color:#9cacbf}
        .topic-box{padding:26px;background:#172c4e;color:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
        .topic-box h3{color:#fff}
        .topic-box p{color:#cbd7ea;font-size:14px}
        .topic-link{display:block;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.16);color:#e7efff;font-size:14px}
        .topic-link:last-child{border-bottom:0}
        .assurance-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
        .assurance{padding:25px 20px;border-top:3px solid var(--blue);background:#fff;border-radius:0 0 14px 14px;box-shadow:var(--shadow)}
        .assurance h3{font-size:18px;margin-bottom:9px}
        .assurance p{color:var(--muted);font-size:14px;margin:0}
        .quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
        .quick{padding:22px;background:#f5f8fd;border:1px solid #e1e9f4;border-radius:14px}
        .quick strong{display:block;font-size:16px;margin-bottom:8px}
        .quick span{color:var(--muted);font-size:14px}
        .faq-area{display:grid;grid-template-columns:.7fr 1.3fr;gap:46px;align-items:start}
        .faq-intro p{color:var(--muted)}
        .accordion{margin:0;border:0;background:transparent}
        .accordion-item{border:1px solid var(--line)!important;border-radius:11px!important;margin-bottom:10px;overflow:hidden;background:#fff}
        .accordion-title{border:0!important;color:var(--ink);font-weight:750;font-size:16px;padding:18px 48px 18px 20px}
        .accordion-title:hover,.accordion-title:focus{background:var(--blue-soft);color:var(--blue)}
        .accordion-content{border:0!important;color:var(--muted);font-size:14px;padding:0 20px 20px}
        .cta-section{background:#edf5ff}
        .form-card{display:grid;grid-template-columns:.85fr 1.15fr;gap:44px;padding:42px;background:#fff;border:1px solid #d4e2f5;border-radius:24px;box-shadow:var(--shadow)}
        .form-card p{color:var(--muted)}
        .form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
        label{display:block;color:#3f5069;font-size:13px;font-weight:750;margin-bottom:6px}
        input,select{width:100%;height:48px;border:1px solid #d5dfec;border-radius:9px;padding:0 13px;background:#fbfcfe;color:var(--ink);outline:none}
        input:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(34,102,214,.12)}
        .form-note{font-size:12px;color:#8794a7;margin-top:12px}
        .site-footer{padding:48px 0 24px;background:#172c4e;color:#dce6f5}
        .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:42px;padding-bottom:35px}
        .footer-brand{color:#fff;margin-bottom:12px}
        .footer-copy{color:#aebed5;font-size:14px;max-width:300px}
        .footer-title{font-size:14px;color:#fff;font-weight:800;margin-bottom:14px}
        .footer-links a{display:block;color:#aebed5;font-size:14px;margin:8px 0}
        .footer-links a:hover{color:#fff}
        .copyright{border-top:1px solid rgba(255,255,255,.15);padding-top:20px;color:#94a8c3;font-size:12px}
        @media(max-width:1024px){
            .hero-grid{gap:28px}.matrix{grid-template-columns:1fr 1fr}.feature-card.large{grid-row:auto;grid-column:span 2}
            .scenes,.assurance-grid{grid-template-columns:repeat(2,1fr)}.timeline{grid-template-columns:repeat(3,1fr);row-gap:30px}.timeline:before{display:none}
        }
        @media(max-width:768px){
            .container{padding:0 18px}.topbar{min-height:68px}.menu-icon{display:block;font-size:26px}.nav-list{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 18px 18px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
            .nav-list.is-open{display:block}.nav-list a{padding:12px 10px}.nav-list .nav-cta{margin:6px 0 0}
            .hero{padding:54px 0 42px}.hero-grid,.news-layout,.faq-area,.form-card{grid-template-columns:1fr}.hero-panel{min-height:auto}.kpi-strip{grid-template-columns:repeat(2,1fr)}
            section{padding:64px 0}.matrix{grid-template-columns:1fr}.feature-card.large{grid-column:auto}.compare-wrap{grid-template-columns:1fr}.quick-grid{grid-template-columns:1fr 1fr}
            .footer-grid{grid-template-columns:1fr 1fr}
        }
        @media(max-width:520px){
            h1{font-size:35px}.hero-copy p{font-size:15px}.kpi-strip,.scenes,.assurance-grid,.quick-grid,.form-row{grid-template-columns:1fr}
            .timeline{grid-template-columns:1fr;text-align:left}.step{text-align:left;padding:0 0 20px 70px}.step-no{position:absolute;left:0;top:0;margin:0}.step p{max-width:260px}.info-item{grid-template-columns:1fr auto;gap:3px 12px}.info-item .date{grid-column:1/-1}.footer-grid{grid-template-columns:1fr}.form-card{padding:28px 20px}
        }