/* roulang page: index */
:root{
            --blue:#2563eb;
            --blue-deep:#123a88;
            --cyan:#0ea5b7;
            --ink:#14213d;
            --muted:#64748b;
            --soft:#f4f8ff;
            --line:#dce6f3;
            --white:#fff;
            --orange:#f59e0b;
            --radius:20px;
            --shadow:0 18px 50px rgba(27,67,128,.11);
            --shadow-sm:0 8px 25px rgba(27,67,128,.08);
        }
        *{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.75;font-size:15px}
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block}
        button,input{font:inherit}
        button{cursor:pointer;border:0}
        .container{width:min(1160px,calc(100% - 40px));margin:0 auto}
        .topline{height:38px;background:#102e68;color:#cfe0ff;font-size:12px}
        .topline .container{height:100%;display:flex;align-items:center;justify-content:space-between}
        .topnote{display:flex;gap:18px;align-items:center}
        .topnote span:first-child{color:#fff}
        .toplink{color:#b8d2ff;transition:.25s}
        .toplink:hover{color:#fff}
        header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.95);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,230,243,.9)}
        .nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
        .brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.5px;font-size:20px;color:var(--blue-deep);white-space:nowrap}
        .brand-mark{width:34px;height:34px;border-radius:11px;background:linear-gradient(145deg,#2f80ed,#0ea5b7);position:relative;box-shadow:0 7px 16px rgba(37,99,235,.25)}
        .brand-mark:before,.brand-mark:after{content:"";position:absolute;border-radius:5px;background:#fff;opacity:.95}
        .brand-mark:before{width:15px;height:6px;left:9px;top:9px}
        .brand-mark:after{width:10px;height:6px;left:9px;top:19px}
        .nav-links{display:flex;align-items:center;gap:30px;margin-left:auto}
        .nav-links a{font-size:14px;color:#53647e;position:relative;padding:26px 0;transition:.25s}
        .nav-links a:hover,.nav-links a.active{color:var(--blue);font-weight:700}
        .nav-links a.active:after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:var(--blue);border-radius:3px 3px 0 0}
        .nav-action{padding:10px 18px;border:1px solid #c8d9f4;border-radius:10px;color:var(--blue);font-weight:700;transition:.25s}
        .nav-action:hover{background:#edf4ff;border-color:var(--blue)}
        .hero{padding:72px 0 86px;background:linear-gradient(180deg,#f4f8ff 0%,#fff 88%);overflow:hidden}
        .hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:62px;align-items:center}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:1.5px;margin-bottom:18px}
        .eyebrow i{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 6px #d9f5f5}
        h1{font-size:clamp(36px,5vw,62px);line-height:1.18;letter-spacing:-2.5px;max-width:680px;margin-bottom:24px}
        .hero-copy{font-size:17px;color:#53647e;max-width:650px;line-height:1.9;margin-bottom:30px}
        .hero-buttons{display:flex;gap:13px;align-items:center;flex-wrap:wrap}
        .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:11px;font-weight:700;transition:transform .25s,box-shadow .25s,background .25s}
        .btn-primary{background:var(--blue);color:#fff;box-shadow:0 10px 20px rgba(37,99,235,.22)}
        .btn-primary:hover{transform:translateY(-2px);background:#1d4ed8;box-shadow:0 14px 25px rgba(37,99,235,.28)}
        .btn-ghost{color:var(--blue-deep);border:1px solid #cbdcf5;background:#fff}
        .btn-ghost:hover{background:#eef5ff;border-color:#9ebde9}
        .hero-card{background:#fff;border:1px solid #dce8f7;border-radius:24px;padding:25px;box-shadow:var(--shadow);position:relative}
        .hero-card:before{content:"";position:absolute;width:120px;height:120px;background:#dff6f5;border-radius:50%;right:-35px;top:-35px;z-index:0}
        .card-head{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:1;margin-bottom:22px}
        .card-head strong{font-size:16px}.status{font-size:12px;padding:4px 9px;border-radius:20px;background:#e8f8ef;color:#16834b;font-weight:700}
        .mini-chart{height:130px;border-radius:15px;background:linear-gradient(180deg,#f4f8ff,#fbfdff);border:1px solid #e8eff8;padding:17px;position:relative;overflow:hidden}
        .chart-lines{display:flex;align-items:end;height:90px;gap:10px}
        .bar{flex:1;background:linear-gradient(180deg,#56a2ff,#2563eb);border-radius:5px 5px 2px 2px;min-height:22px}
        .bar:nth-child(1){height:42%}.bar:nth-child(2){height:57%}.bar:nth-child(3){height:48%}.bar:nth-child(4){height:76%}.bar:nth-child(5){height:68%}.bar:nth-child(6){height:91%}.bar:nth-child(7){height:83%}
        .chart-label{position:absolute;top:12px;right:15px;color:var(--muted);font-size:11px}
        .hero-card-bottom{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}
        .hero-stat{padding:13px 10px;background:#f7faff;border-radius:12px}.hero-stat b{display:block;font-size:20px;color:var(--blue-deep)}.hero-stat span{font-size:11px;color:var(--muted)}
        main section{padding:82px 0}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:32px}
        .section-head h2{font-size:32px;line-height:1.25;letter-spacing:-1px}
        .section-head p{max-width:570px;color:var(--muted);font-size:15px}
        .section-kicker{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:1.3px;margin-bottom:8px}
        .metrics{background:#fff}
        .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
        .metric{padding:25px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow-sm);transition:.25s}
        .metric:hover,.service:hover,.compare-box:hover,.news-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
        .metric strong{font-size:32px;color:var(--blue-deep);display:block;letter-spacing:-1px}.metric strong em{font-size:17px;font-style:normal;color:var(--cyan)}.metric span{color:var(--muted);font-size:13px}
        .services{background:var(--soft)}
        .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .service{background:#fff;padding:25px;border-radius:17px;border:1px solid #e2ebf7;transition:.25s}
        .icon{width:40px;height:40px;border-radius:12px;background:#eaf2ff;color:var(--blue);display:grid;place-items:center;font-weight:800;margin-bottom:18px}
        .service h3{font-size:18px;margin-bottom:8px}.service p{font-size:13px;color:var(--muted);line-height:1.8}
        .comparison{background:#fff}
        .compare-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}
        .compare-box{padding:28px;border-radius:18px;border:1px solid var(--line);transition:.25s}
        .compare-box.good{border-color:#a8d8dc;background:#f5fffe}
        .compare-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:21px}.compare-title h3{font-size:19px}.compare-title b{font-size:11px;color:var(--muted);background:#eaf0f7;padding:5px 9px;border-radius:20px}.good .compare-title b{color:#087f82;background:#d8f4f1}
        .check-list{list-style:none;display:grid;gap:13px}.check-list li{font-size:14px;color:#55657e;display:flex;gap:10px}.check-list li:before{content:"✓";color:var(--cyan);font-weight:800}
        .milestones{background:#102e68;color:#fff}.milestones .section-kicker{color:#8bdde0}.milestones .section-head p{color:#bcd0ee}
        .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid rgba(255,255,255,.2)}
        .step{padding:25px 22px 0;border-right:1px solid rgba(255,255,255,.15);position:relative}.step:last-child{border:0}.step:before{content:"";display:block;width:12px;height:12px;background:#47c4cd;border:3px solid #102e68;outline:1px solid #47c4cd;border-radius:50%;margin-top:-32px;margin-bottom:19px}.step b{display:block;font-size:14px;color:#fff;margin-bottom:8px}.step p{font-size:13px;color:#bcd0ee}
        .news{background:#f8fbff}.news-layout{display:grid;grid-template-columns:1.35fr .65fr;gap:26px}
        .news-list{display:grid;gap:11px}.news-item{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:13px;transition:.25s}.news-item h3{font-size:15px;font-weight:700}.news-item span{font-size:12px;color:#94a3b8;white-space:nowrap}.news-tag{color:var(--blue);font-size:11px;margin-bottom:5px;display:block}
        .feature-news{padding:28px;border-radius:18px;background:linear-gradient(145deg,#2368d8,#123a88);color:#fff;min-height:100%}.feature-news small{color:#a9dfea}.feature-news h3{font-size:23px;line-height:1.45;margin:20px 0 14px}.feature-news p{font-size:13px;color:#d4e2fa;line-height:1.9}
        .assurance{background:#fff}.assure-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.assure{padding:24px;border-radius:16px;background:#f8fbff;border:1px solid var(--line)}.assure h3{font-size:17px;margin:12px 0 7px}.assure p{font-size:13px;color:var(--muted)}
        .faq{background:var(--soft)}.faq-list{max-width:880px;margin:auto;display:grid;gap:12px}.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 21px}.faq summary{cursor:pointer;font-weight:700;color:var(--ink)}.faq details p{color:var(--muted);font-size:14px;margin-top:12px;padding-top:12px;border-top:1px solid #edf2f8}
        .closing{padding:70px 0 88px}.closing-box{background:#eaf3ff;border:1px solid #c8dcf8;border-radius:24px;padding:45px 55px;display:flex;align-items:center;justify-content:space-between;gap:30px}.closing h2{font-size:31px;line-height:1.35;margin-bottom:10px}.closing p{color:var(--muted);max-width:650px}
        footer{background:#0d2552;color:#b8c9e6;padding:43px 0 22px}.footer-main{display:flex;justify-content:space-between;gap:30px;padding-bottom:35px}.footer-brand{color:#fff;font-size:19px;font-weight:800;margin-bottom:10px}.footer-main p{font-size:13px;max-width:430px}.footer-links{display:flex;gap:23px;align-items:flex-start}.footer-links a{font-size:13px;transition:.2s}.footer-links a:hover{color:#fff}.copyright{border-top:1px solid rgba(255,255,255,.13);padding-top:18px;font-size:12px;color:#8fa7cc}
        :focus-visible{outline:3px solid #77dbe0;outline-offset:3px}
        @media(max-width:900px){.hero-grid{gap:35px}.nav-links{gap:17px}.metric-grid{grid-template-columns:repeat(2,1fr)}.service-grid{grid-template-columns:repeat(2,1fr)}.closing-box{padding:35px}.news-layout{grid-template-columns:1fr}}
        @media(max-width:680px){.container{width:min(100% - 28px,1160px)}.topline{height:auto;padding:8px 0}.topline .container{align-items:flex-start;gap:5px}.topnote{gap:8px;flex-wrap:wrap}.toplink{display:none}.nav{height:65px}.brand{font-size:17px}.brand-mark{width:30px;height:30px}.nav-links{gap:0}.nav-links a{font-size:13px;padding:21px 0}.nav-action{display:none}.hero{padding:52px 0 60px}.hero-grid{grid-template-columns:1fr}.hero-copy{font-size:15px}.hero-card{max-width:520px}.section-head{display:block;margin-bottom:24px}.section-head h2{font-size:27px;margin-bottom:10px}main section{padding:57px 0}.service-grid,.assure-grid,.compare-layout{grid-template-columns:1fr}.metric-grid{gap:10px}.metric{padding:18px}.metric strong{font-size:26px}.timeline{grid-template-columns:1fr 1fr;gap:0}.step{padding:25px 15px 24px}.step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid rgba(255,255,255,.15)}.closing-box{display:block;padding:30px 23px}.closing h2{font-size:26px;margin-bottom:13px}.closing .btn{margin-top:22px}.footer-main{display:block}.footer-links{margin-top:24px;flex-wrap:wrap;gap:15px}}
        @media(max-width:420px){h1{font-size:35px}.hero-card-bottom{gap:5px}.hero-stat{padding:10px 6px}.hero-stat b{font-size:17px}.metric-grid{grid-template-columns:1fr 1fr}.news-item{display:block}.news-item span{display:block;margin-top:5px}.timeline{grid-template-columns:1fr}.step,.step:nth-child(2){border-right:0;border-bottom:1px solid rgba(255,255,255,.15)}}