/* roulang page: index */
:root{
            --ink:#17201d;
            --ink-2:#29332e;
            --muted:#66716c;
            --line:#dfe5df;
            --paper:#f6f6f1;
            --white:#fff;
            --cream:#efeee5;
            --green:#173d35;
            --green-2:#236052;
            --green-3:#3f8970;
            --gold:#d5ad66;
            --orange:#e68a4b;
            --gradient:linear-gradient(120deg,#143b35 0%,#1f5a4c 52%,#c9a35a 100%);
            --shadow:0 18px 40px rgba(23,32,29,.08);
            --shadow-lg:0 24px 50px rgba(20,40,34,.16);
            --radius:24px;
            --radius-sm:14px;
            --radius-xs:999px;
            --space:22px;
            --max:1180px;
            --header-h:118px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        @media (prefers-reduced-motion:reduce){
            html{scroll-behavior:auto}
            *,*::before,*::after{animation:none!important;transition:none!important}
        }
        body{
            margin:0;
            font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
            color:var(--ink);
            background:var(--paper);
            line-height:1.7;
            font-size:16px;
            overflow-x:hidden;
        }
        a{color:inherit;text-decoration:none}
        img{max-width:100%;display:block;height:auto}
        button,input,select,textarea{font:inherit}
        button{cursor:pointer}
        h1,h2,h3,h4,p{margin:0}
        ul{margin:0;padding:0;list-style:none}
        .container{width:min(var(--max),calc(100% - 36px));margin:0 auto}
        .skip{
            position:absolute;left:-999px;top:8px;background:#fff;padding:8px 12px;z-index:99;border-radius:8px
        }
        .skip:focus{left:12px}
        .topbar{
            background:linear-gradient(90deg,#122924,#1c443b 60%,#2a5d4e);
            color:#f4efe4;
            font-size:13px;
        }
        .topbar-inner{
            display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:46px;
        }
        .brand{
            display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.04em;color:#f7efd8
        }
        .brand-mark{
            width:28px;height:28px;border-radius:9px;
            background:linear-gradient(135deg,#d5ad66,#f0d7a2);
            display:grid;place-items:center;color:#1a2c27;font-size:13px;font-weight:800
        }
        .top-meta{display:flex;align-items:center;gap:18px;flex-wrap:wrap;color:#d9e5df}
        .top-meta a{color:#f6edd6}
        .top-meta span{white-space:nowrap}
        .btn{
            display:inline-flex;align-items:center;justify-content:center;gap:8px;
            min-height:44px;padding:0 18px;border-radius:var(--radius-xs);border:1px solid transparent;
            font-weight:650;letter-spacing:.02em;transition:.22s ease;
        }
        .btn-gold{
            background:linear-gradient(120deg,#e8c47a,#c7923d);
            color:#1b241f;box-shadow:0 8px 18px rgba(197,146,61,.25)
        }
        .btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(197,146,61,.32)}
        .btn-gold:active{transform:translateY(0)}
        .btn-line{
            background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.28);color:#fff
        }
        .btn-line:hover{background:#fff;color:var(--green)}
        .btn-dark{
            background:var(--green);color:#fff
        }
        .btn-dark:hover{background:#0f2d27;transform:translateY(-2px)}
        .btn-ghost{
            background:#fff;border-color:#cfd8d2;color:var(--green)
        }
        .btn-ghost:hover{border-color:var(--green);box-shadow:var(--shadow)}
        .btn:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,.faq-btn:focus-visible{
            outline:3px solid #d5ad66;outline-offset:2px
        }
        .navwrap{
            position:sticky;top:0;z-index:40;background:rgba(246,246,241,.92);
            backdrop-filter:blur(16px);border-bottom:1px solid rgba(23,61,53,.08)
        }
        .nav{
            display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:72px
        }
        .nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
        .nav-links a{
            padding:9px 12px;border-radius:999px;color:#31413b;font-size:15px;font-weight:600
        }
        .nav-links a:hover,.nav-links a.active{background:#173d35;color:#f7efd8}
        .nav-cta{display:flex;align-items:center;gap:10px}
        .hamburger{
            display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff
        }
        .hamburger span{display:block;width:18px;height:2px;background:var(--ink);margin:4px auto}
        .mobile-panel{display:none}
        .campaign{
            background:linear-gradient(90deg,#f3e6c6,#fff8e8 40%,#e7f1ea);
            border-bottom:1px solid #ead9b0;color:#4a3a1e;font-size:14px
        }
        .campaign-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:42px}
        .badge,.chip{
            display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:999px;
            background:linear-gradient(180deg,#fff,#f2efe4);border:1px solid rgba(213,173,102,.35);
            font-size:12px;font-weight:700;color:#5b4a28
        }
        .hero{
            position:relative;min-height:760px;color:#fff;overflow:hidden;
            background:#12211d
        }
        .slides{position:absolute;inset:0}
        .slide{
            position:absolute;inset:0;opacity:0;transition:opacity .8s ease
        }
        .slide.active{opacity:1}
        .slide img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.05)}
        .hero::after{
            content:"";position:absolute;inset:0;
            background:linear-gradient(90deg,rgba(10,20,18,.82) 8%,rgba(18,34,30,.46) 52%,rgba(18,28,24,.2));
        }
        .hero-copy{
            position:relative;z-index:2;padding:84px 0 72px;width:min(760px,100%)
        }
        .kicker{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
        h1{
            font-size:52px;line-height:1.16;letter-spacing:.01em;font-weight:780;max-width:16ch
        }
        .lead{margin:18px 0 26px;font-size:17px;line-height:1.85;color:#f3efe4;max-width:42em}
        .cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:28px}
        .metric-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
        .metric{
            background:linear-gradient(180deg,rgba(255,255,255,.16),rgba(255,255,255,.07));
            border:1px solid rgba(255,255,255,.18);border-radius:18px;padding:14px 16px;backdrop-filter:blur(8px)
        }
        .metric b{display:block;font-size:28px;line-height:1.1;color:#f6e2b3}
        .metric span{display:block;margin-top:6px;font-size:13px;color:#e5ece8}
        .hero-ctrl{
            position:absolute;z-index:3;right:24px;bottom:24px;display:flex;gap:8px
        }
        .dot,.arrow{
            width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.3);
            background:rgba(16,28,24,.35);color:#fff
        }
        .dot.active{background:#d5ad66;border-color:#d5ad66;color:#1b241f}
        main{display:block}
        section{padding:84px 0;position:relative}
        .sec-head{max-width:760px;margin-bottom:32px}
        .sec-head h2{font-size:36px;line-height:1.25;margin:8px 0 12px}
        .sec-head p{color:var(--muted);font-size:16px}
        .eyebrow{color:var(--green-2);font-size:13px;font-weight:700;letter-spacing:.12em}
        .panel{
            background:#fff;border:1px solid rgba(23,61,53,.08);border-radius:var(--radius);
            box-shadow:var(--shadow)
        }
        .pain{background:linear-gradient(180deg,#fbfaf4,#efece1)}
        .pain-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}
        .issue-list{display:grid;gap:12px}
        .issue{
            display:grid;grid-template-columns:56px 1fr;gap:14px;align-items:center;
            padding:16px;border-radius:20px;background:#fff;border:1px solid var(--line)
        }
        .issue i{
            width:56px;height:56px;border-radius:16px;display:grid;place-items:center;
            background:linear-gradient(135deg,#173d35,#3f8970);color:#f6e7c2;font-style:normal;font-weight:800
        }
        .board{
            display:grid;grid-template-columns:repeat(4,1fr);gap:16px
        }
        .stat-card{padding:22px;background:#fff;border-radius:24px;border:1px solid var(--line);box-shadow:var(--shadow)}
        .stat-card em{font-style:normal;font-size:34px;color:var(--green);font-weight:800}
        .bar{height:8px;background:#ece8dc;border-radius:99px;overflow:hidden;margin-top:14px}
        .bar span{display:block;height:100%;background:linear-gradient(90deg,#1f5a4c,#d5ad66);border-radius:99px}
        .matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .card{
            background:#fff;border-radius:24px;padding:24px;border:1px solid rgba(23,61,53,.08);
            box-shadow:var(--shadow);transition:.22s ease
        }
        .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
        .icon{
            width:46px;height:46px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
            background:linear-gradient(135deg,#173d35,#3c7d68);color:#f4e1b3;font-weight:800
        }
        .card h3{font-size:22px;margin-bottom:10px}
        .card li,.check li{position:relative;padding-left:16px;margin:6px 0;color:#4c5752;font-size:14px}
        .card li:before,.check li:before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--gold)}
        .split{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:center}
        .shot{
            border-radius:28px;overflow:hidden;min-height:420px;position:relative;box-shadow:var(--shadow-lg)
        }
        .shot img{width:100%;height:100%;object-fit:cover;min-height:420px}
        .trustbar{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
        .fleet-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .fleet-card{overflow:hidden;padding:0}
        .fleet-card img{height:210px;width:100%;object-fit:cover}
        .fleet-body{padding:20px}
        .tags{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 14px}
        .tag{font-size:12px;padding:4px 10px;border-radius:999px;background:#f3f1e7;color:#35584e}
        .compare{background:#f0eee6}
        .table-wrap{overflow:auto;border-radius:24px;border:1px solid var(--line);background:#fff}
        table{width:100%;border-collapse:collapse;min-width:720px}
        th,td{padding:16px 18px;text-align:left;border-bottom:1px solid #ece8dc;font-size:14px}
        th{background:#f7f4ea}
        .hl{background:linear-gradient(180deg,#f8f1dc,#fff);box-shadow:inset 0 0 0 2px #d5ad66}
        .dark{
            background:linear-gradient(160deg,#101916,#1c3a32 55%,#123029);color:#f4efe6
        }
        .dark .sec-head p{color:#c9d5cf}
        .case-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px}
        .case-photo{border-radius:28px;overflow:hidden;min-height:360px}
        .case-photo img{width:100%;height:100%;object-fit:cover;min-height:360px}
        .timeline{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
        .node{padding:18px;background:#fff;border-radius:20px;border:1px dashed #d7c398}
        .node b{display:block;margin:8px 0 6px}
        .stories{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
        .statsbar{
            background:linear-gradient(90deg,#173d35,#2c6a58);
            color:#fff;padding:42px 0
        }
        .statsbar .board{gap:8px}
        .statsbar .stat-card{background:transparent;border:0;box-shadow:none;color:#fff;text-align:center}
        .statsbar em{color:#f3d59a}
        .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
        .stars{color:#c7923d;letter-spacing:2px;margin-bottom:8px}
        .news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
        .news-card img{height:150px;object-fit:cover;width:100%}
        .meta{font-size:12px;color:var(--muted);margin:10px 0}
        .guard-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
        .promise{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
        .quick{display:grid;grid-template-columns:.9fr 1.1fr;gap:20px}
        .mini-form,.faq-item,.contact-card{background:#fff;border-radius:24px;border:1px solid var(--line);padding:22px}
        .faq-list{display:grid;gap:10px}
        .faq-btn{
            width:100%;min-height:52px;text-align:left;background:#fff;border:1px solid var(--line);
            border-radius:16px;padding:14px 18px;font-weight:700;display:flex;justify-content:space-between;align-items:center
        }
        .faq-btn[aria-expanded="true"]{background:#173d35;color:#fff;border-color:#173d35}
        .faq-panel{display:none;padding:8px 6px 4px;color:#4d5853}
        .faq-panel.open{display:block}
        .contact{
            padding-bottom:40px
        }
        .contact-wrap{
            display:grid;grid-template-columns:.9fr 1.1fr;gap:0;overflow:hidden;
            background:var(--gradient);border-radius:28px;color:#fff
        }
        .contact-copy,.form-box{padding:36px}
        .form-box{background:rgba(255,255,255,.1);backdrop-filter:blur(8px)}
        .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
        label{display:block;font-size:13px;margin-bottom:6px}
        input,select,textarea{
            width:100%;border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.12);
            color:#fff;border-radius:12px;padding:12px 12px;min-height:44px
        }
        textarea{min-height:96px;resize:vertical}
        input::placeholder,textarea::placeholder{color:#e8e2d3}
        .full{grid-column:1/-1}
        .form-note{margin-top:10px;font-size:13px;color:#f3e7c5;min-height:20px}
        footer{background:#101714;color:#d5ddd8;padding:48px 0 20px}
        .foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:24px}
        .foot-grid a{display:block;margin:6px 0;color:#d5ddd8}
        .foot-grid a:hover{color:#f0d7a2}
        .copy{margin-top:28px;padding-top:16px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:#9aa59f}
        @media (max-width:1200px){
            h1{font-size:44px}
            .metric-row,.board,.matrix,.fleet-grid,.timeline,.stories,.reviews,.news-grid,.guard-grid{grid-template-columns:repeat(2,1fr)}
        }
        @media (max-width:992px){
            .pain-grid,.split,.case-grid,.quick,.contact-wrap,.foot-grid{grid-template-columns:1fr}
            .nav-links{display:none}
            .hamburger{display:inline-block}
            .mobile-panel.open{
                display:grid;gap:8px;padding:8px 18px 16px
            }
            .mobile-panel a{padding:12px;border-radius:12px;background:#fff;border:1px solid var(--line)}
            .hero{min-height:680px}
            .top-meta span:nth-child(n+4){display:none}
        }
        @media (max-width:768px){
            section{padding:64px 0}
            h1{font-size:34px}
            .sec-head h2{font-size:28px}
            .metric-row,.board,.matrix,.fleet-grid,.timeline,.stories,.reviews,.news-grid,.guard-grid,.form-grid{grid-template-columns:1fr}
            .hero-copy{padding:56px 0 48px}
            .topbar-inner{flex-wrap:wrap;padding:8px 0}
            .campaign-inner{flex-direction:column;align-items:flex-start;padding:8px 0}
        }
        @media (max-width:576px){
            .container{width:min(var(--max),calc(100% - 24px))}
            h1{font-size:30px}
            .btn{width:100%}
            .cta-row .btn{width:auto;flex:1}
            .hero-ctrl{right:12px;bottom:12px}
        }
        @media (max-width:375px){
            body{font-size:15px}
            h1{font-size:28px}
            .metric b,.stat-card em{font-size:26px}
        }