/* roulang page: index */
:root{--ink:#17221f;--muted:#65716d;--paper:#f6f5f0;--white:#fff;--line:#dfe4df;--green:#527b6c;--green-dark:#31594d;--orange:#c87545;--sand:#eee6d8;--deep:#17231f;--radius:18px;--shadow:0 14px 40px rgba(29,49,42,.09)}
        *{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;overflow-x:hidden}
        a{color:inherit;text-decoration:none} img{display:block;max-width:100%} button,input,textarea{font:inherit} button{cursor:pointer;border:0}
        .container{width:min(1200px,calc(100% - 48px));margin:auto}
        .topbar{height:68px;background:var(--white);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
        .brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px;letter-spacing:.02em}
        .brand-mark{width:34px;height:34px;background:var(--green);color:white;display:grid;place-items:center;border-radius:9px;font-size:15px}
        .trust{font-size:13px;color:var(--muted);letter-spacing:.08em}
        .top-actions{display:flex;align-items:center;gap:22px;font-size:14px}.phone{color:var(--green-dark);font-weight:700}
        .menu-toggle{display:none;background:transparent;font-size:25px;color:var(--ink);min-width:44px;min-height:44px}
        .navrow{height:58px;background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
        .nav-inner{height:100%;display:flex;align-items:center;gap:34px}.nav-inner a{height:100%;display:flex;align-items:center;font-size:14px;color:#53615b;position:relative;white-space:nowrap}
        .nav-inner a:hover,.nav-inner a.active{color:var(--green-dark)}.nav-inner a.active:after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:var(--orange)}
        .btn{min-height:46px;padding:10px 22px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:14px;font-weight:700;transition:.25s;border:1px solid transparent}
        .btn-primary{background:var(--orange);color:white}.btn-primary:hover{background:#a95e34;transform:translateY(-2px)}
        .btn-outline{border-color:var(--green);color:var(--green-dark);background:transparent}.btn-outline:hover{background:#e8f0eb}
        .btn:focus-visible,.nav-inner a:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid rgba(200,117,69,.35);outline-offset:3px}
        section{padding:100px 0}.eyebrow{color:var(--orange);font-weight:800;font-size:13px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:14px}
        h1,h2,h3{line-height:1.25;letter-spacing:-.035em}h1{font-size:clamp(42px,6vw,76px);max-width:700px}h2{font-size:clamp(30px,4vw,48px)}h3{font-size:20px}
        .section-head{max-width:700px;margin-bottom:48px}.section-head p{margin-top:18px;color:var(--muted);font-size:16px}
        .hero{min-height:650px;position:relative;color:white;background:#293d35;overflow:hidden;padding:0}
        .hero-slide{min-height:650px;padding:120px 0;display:none;background-size:cover;background-position:center}
        .hero-slide.active{display:block}.hero-slide:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(22,35,30,.9),rgba(22,35,30,.38) 65%,rgba(22,35,30,.16))}
        .hero-content{position:relative;z-index:1}.hero h1{color:#fff}.hero p{max-width:650px;color:#e5ece6;margin:26px 0 32px;font-size:18px;line-height:1.9}
        .hero-buttons{display:flex;gap:14px}.hero .btn-outline{color:white;border-color:#c9d8cc}.hero .btn-outline:hover{background:rgba(255,255,255,.14)}
        .hero-meta{display:flex;gap:30px;margin-top:55px;color:#d3e0d7;font-size:13px}.hero-meta strong{display:block;color:#fff;font-size:25px;line-height:1.2}
        .slider-controls{position:absolute;bottom:42px;right:max(24px,calc((100% - 1200px)/2));z-index:2;display:flex;align-items:center;gap:10px}
        .slider-controls button{width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.15);color:white;border:1px solid rgba(255,255,255,.4)}.slider-controls button:hover{background:var(--orange)}
        .dots{display:flex;gap:7px;margin:0 10px}.dot{width:26px;height:4px;background:#b7c6bb;border-radius:5px}.dot.active{background:var(--orange)}
        .intro{background:#fff}.intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:80px;align-items:center}.image-frame{position:relative}.image-frame img{width:100%;height:450px;object-fit:cover;border-radius:4px 40px 4px 40px}.image-note{position:absolute;right:-25px;bottom:25px;background:var(--green-dark);color:white;padding:20px 24px;border-radius:10px;box-shadow:var(--shadow)}
        .intro-copy p{color:var(--muted);margin:20px 0 26px}.tags{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:28px}.tag{padding:6px 12px;border:1px solid #cbd8cf;border-radius:100px;color:var(--green-dark);font-size:13px;background:#f5faf6}
        .info-list{border-top:1px solid var(--line)}.info-list div{display:flex;justify-content:space-between;padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}.info-list span{color:var(--muted)}
        .pain{background:#eeece5}.pain-list{border-top:1px solid #c9cec7}.pain-item{display:grid;grid-template-columns:90px 1.1fr 1.5fr 180px;gap:25px;padding:25px 0;border-bottom:1px solid #c9cec7;align-items:center}.num{font-size:34px;color:var(--orange);font-weight:800}.pain-item p{color:var(--muted);font-size:14px}.pill{font-size:12px;color:var(--green-dark);background:#dce8df;padding:5px 11px;border-radius:4px;justify-self:start}
        .solution{background:#f8f8f5}.mapping{display:grid;gap:0}.map-row{display:grid;grid-template-columns:80px 1fr 1.3fr 1fr 130px;align-items:center;gap:20px;padding:25px 20px;border-top:1px solid var(--line)}.map-row:last-child{border-bottom:1px solid var(--line)}.map-row:hover{background:#fff}.map-no{font-size:30px;font-weight:800;color:var(--green)}.map-row p{font-size:14px;color:var(--muted)}.map-link{color:var(--orange);font-size:13px;font-weight:700}
        .advantages{background:#fff}.adv-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}.adv-card{min-height:250px;padding:24px 18px;border:1px solid var(--line);border-top:4px solid var(--green);transition:.25s}.adv-card:nth-child(2n){transform:translateY(25px);border-top-color:var(--orange)}.adv-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.adv-card:nth-child(2n):hover{transform:translateY(18px)}.adv-card b{color:var(--orange);font-size:13px}.adv-card h3{margin:28px 0 12px;font-size:17px}.adv-card p{font-size:13px;color:var(--muted)}
        .products{background:var(--sand)}.product-grid{display:grid;grid-template-columns:1.25fr .88fr .88fr;gap:18px}.product{background:white;min-height:390px;padding:30px;display:flex;flex-direction:column;justify-content:flex-end;position:relative;overflow:hidden;border-radius:16px}.product:first-child{min-height:470px;color:white;background:linear-gradient(180deg,transparent 28%,rgba(18,35,29,.9)),url('/assets/images/14220049c2f7dc8c.webp') center/cover}.product:not(:first-child){border:1px solid #ddd4c6}.product h3{margin:14px 0 10px}.product p{font-size:14px;color:var(--muted)}.product:first-child p{color:#e7eee9}.product .tag{align-self:flex-start}.product .btn{margin-top:22px;align-self:flex-start}
        .steps{background:#f8f8f5}.timeline{display:grid;grid-template-columns:repeat(5,1fr);position:relative;gap:18px}.timeline:before{content:"";height:1px;background:#b8c8bd;position:absolute;top:25px;left:4%;right:4%}.step{position:relative;z-index:1}.step-dot{width:50px;height:50px;border-radius:50%;background:var(--paper);border:1px solid var(--green);display:grid;place-items:center;color:var(--green-dark);font-weight:800;margin-bottom:22px}.step h3{font-size:17px;margin-bottom:8px}.step p{font-size:13px;color:var(--muted)}
        .case{background:var(--deep);color:white}.case .section-head p{color:#b8c8bf}.case-panel{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.case-panel img{width:100%;height:350px;object-fit:cover;filter:saturate(.7);border-radius:4px 32px 4px 32px}.case-copy p{color:#c4d0c8;margin:20px 0}.case-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;border-top:1px solid #52645a;padding-top:22px}.case-stats strong{font-size:28px;color:#e8b184;display:block}.case-stats span{font-size:12px;color:#b8c8bf}.dark-tag{border-color:#63786b;background:transparent;color:#d7e5dc}
        .stories{background:#fff}.story-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px}.story-main{background:#e9f0ea;padding:38px;border-left:5px solid var(--green)}.story-main blockquote{font-size:24px;line-height:1.6;margin:25px 0}.story-meta{display:flex;gap:30px;font-size:13px;color:var(--muted)}.quote-list{display:grid;gap:14px}.quote{border:1px solid var(--line);padding:24px;background:#fbfcfa}.quote p{font-size:15px;margin-bottom:12px}.quote small{color:var(--green-dark);font-weight:700}
        .metrics{background:#eeece5}.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #c8cec7;border-bottom:1px solid #c8cec7}.metric{padding:30px 20px;border-right:1px solid #c8cec7}.metric:last-child{border:0}.metric strong{font-size:42px;color:var(--green-dark);display:block;line-height:1.2}.metric span{font-size:13px;color:var(--muted)}
        .news{background:#fff}.news-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:18px}.news-card{padding:26px;border:1px solid var(--line);min-height:220px;transition:.25s}.news-card:first-child{background:#f1f5ef}.news-card:hover{border-color:var(--green);transform:translateY(-3px)}.news-card time{font-size:12px;color:var(--orange)}.news-card h3{font-size:19px;margin:20px 0 12px}.news-card p{font-size:13px;color:var(--muted)}.read{display:inline-block;margin-top:18px;color:var(--green-dark);font-size:13px;font-weight:700}
        .faq{background:#f8f8f5}.faq-list{max-width:850px;border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line)}summary{list-style:none;padding:22px 45px 22px 0;position:relative;font-weight:700;cursor:pointer}summary::-webkit-details-marker{display:none}summary:after{content:"＋";position:absolute;right:4px;color:var(--orange);font-size:22px}details[open] summary:after{content:"−"}details p{padding:0 40px 22px 0;color:var(--muted);font-size:14px}
        .cta{background:var(--green-dark);color:#fff;padding:90px 0}.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:start}.cta p{color:#d5e2d9;margin:18px 0 28px}.form{background:#fff;padding:28px;border-radius:14px;color:var(--ink)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:700}.field input,.field textarea{border:1px solid var(--line);padding:11px 12px;border-radius:6px;min-height:44px;background:#fafbf9}.field textarea{min-height:90px;resize:vertical}.form .btn{margin-top:18px;width:100%}.privacy{font-size:12px;color:var(--muted);margin-top:12px!important}.form-message{font-size:13px;margin-top:10px;color:var(--green-dark);display:none}
        footer{background:#14201c;color:#bdcbc1;padding:42px 0 24px}.footer-top{display:flex;justify-content:space-between;gap:30px;padding-bottom:30px;border-bottom:1px solid #394941}.footer-brand{color:#fff}.footer-info{display:flex;gap:25px;flex-wrap:wrap;font-size:13px}.footer-bottom{display:flex;justify-content:space-between;padding-top:22px;font-size:12px;color:#87978e}
        @media(max-width:1024px){.adv-grid{grid-template-columns:repeat(3,1fr)}.product-grid{grid-template-columns:1fr 1fr}.product:first-child{grid-column:1/-1;min-height:360px}.map-row{grid-template-columns:60px 1fr 1fr 110px}.map-row p:nth-child(3){display:none}}
        @media(max-width:768px){.container{width:min(100% - 36px,600px)}.trust,.top-actions .phone{display:none}.menu-toggle{display:block}.navrow{height:auto}.nav-inner{display:none;flex-direction:column;align-items:stretch;gap:0;padding:8px 0}.navrow.open .nav-inner{display:flex}.nav-inner a{min-height:48px}.hero-slide{min-height:650px;padding:90px 0}.intro-grid,.case-panel,.story-grid,.cta-grid{grid-template-columns:1fr;gap:42px}.image-note{right:12px}.pain-item{grid-template-columns:55px 1fr;gap:8px 18px}.pain-item p{grid-column:2}.pain-item .pill{grid-column:2}.timeline{grid-template-columns:1fr;gap:25px;padding-left:34px}.timeline:before{height:auto;width:1px;left:10px;top:25px;bottom:25px;right:auto}.step{display:grid;grid-template-columns:50px 1fr;column-gap:18px}.step-dot{grid-row:1/3}.step p{grid-column:2}.metric-grid{grid-template-columns:1fr 1fr}.metric{border-bottom:1px solid #c8cec7}.metric:nth-child(2){border-right:0}.news-grid{grid-template-columns:1fr}.footer-top,.footer-bottom{flex-direction:column}.footer-info{gap:12px}}
        @media(max-width:520px){section{padding:72px 0}h1{font-size:42px}.hero p{font-size:16px}.hero-buttons{flex-direction:column;align-items:stretch}.hero-meta{gap:18px;margin-top:35px}.hero-meta strong{font-size:21px}.adv-grid,.product-grid{grid-template-columns:1fr}.adv-card:nth-child(2n){transform:none}.product:first-child{grid-column:auto}.map-row{grid-template-columns:45px 1fr 90px;gap:10px;padding:20px 0}.map-row p{display:block!important}.map-row p:nth-child(3){display:none!important}.case-stats{gap:8px}.case-stats strong{font-size:22px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.metric strong{font-size:32px}.slider-controls{right:18px;bottom:24px}}