/* roulang page: index */
:root{--ink:#202326;--muted:#687078;--paper:#f7f6f1;--white:#fff;--line:#dedfd8;--purple:#7048e8;--purple-dark:#4f2bb7;--lime:#d8f36b;--orange:#ff8b5c;--deep:#171a20;--radius:18px;--shadow:0 18px 48px rgba(31,34,38,.09);--max:1220px}
        *{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:16px}
        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(var(--max),calc(100% - 48px));margin:auto}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--purple);font-size:13px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.eyebrow:before{content:"";width:22px;height:3px;background:var(--lime);border-radius:4px}
        h1,h2,h3{line-height:1.2;letter-spacing:-.035em} h2{font-size:clamp(30px,4vw,48px);margin:12px 0 18px} h3{font-size:21px} p{color:var(--muted)}
        .section{padding:112px 0;position:relative}.section-head{max-width:700px;margin-bottom:48px}.section-head p{font-size:17px;max-width:650px}.light{background:#fff}.soft{background:#eeeee8}
        .topbar{position:sticky;top:0;z-index:30;background:rgba(247,246,241,.94);backdrop-filter:blur(16px);border-bottom:1px solid transparent;transition:.25s}.topbar.scrolled{border-color:var(--line);box-shadow:0 8px 24px rgba(20,20,20,.05)}
        .nav-main{height:74px;display:flex;align-items:center;gap:36px}.logo{font-weight:900;font-size:21px;white-space:nowrap;letter-spacing:-.06em}.logo i{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--purple);margin-right:7px}
        .nav-links{display:flex;align-items:center;gap:25px;margin-left:auto}.nav-links a{font-size:14px;color:#555b61;transition:.2s}.nav-links a:hover,.nav-links a.active{color:var(--purple);font-weight:700}.nav-cta,.btn.primary{background:var(--purple);color:#fff;padding:12px 19px;border-radius:9px;font-weight:700;transition:.2s;display:inline-flex;align-items:center;justify-content:center;gap:9px}.nav-cta:hover,.btn.primary:hover{background:var(--purple-dark);transform:translateY(-2px)}.menu-btn{display:none;background:transparent;font-size:25px}
        .nav-sub{border-top:1px solid rgba(222,223,216,.8);height:42px;display:flex;align-items:center}.nav-sub .container{display:flex;gap:24px;align-items:center}.nav-sub span{font-size:12px;color:#858b8d}.nav-sub a{font-size:12px;color:#62686b}.nav-sub a:hover{color:var(--purple)}
        .hero{min-height:660px;color:#fff;position:relative;overflow:hidden;background:var(--deep)}.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity .7s}.hero-slide:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,17,22,.94),rgba(15,17,22,.65) 48%,rgba(15,17,22,.2))}.hero-slide.active{opacity:1}.hero-content{position:relative;z-index:2;padding:112px 0 80px;min-height:660px;display:flex;flex-direction:column;justify-content:center}.hero h1{font-size:clamp(42px,6vw,76px);max-width:760px;margin:20px 0 24px}.hero p{color:#e3e5e1;max-width:700px;font-size:18px}.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}.btn{min-height:48px;padding:12px 21px;border-radius:9px;font-weight:700;display:inline-flex;align-items:center;gap:10px;transition:.2s}.btn.secondary{border:1px solid rgba(255,255,255,.5);color:#fff}.btn.secondary:hover{background:#fff;color:var(--ink)}.hero-meta{display:flex;gap:25px;margin-top:54px}.hero-meta strong{font-size:25px;color:var(--lime);display:block}.hero-meta span{font-size:12px;color:#c8ccc7}.slider-tools{position:absolute;z-index:3;bottom:38px;right:calc((100% - var(--max))/2);display:flex;align-items:center;gap:12px}.slider-tools button{width:40px;height:40px;border:1px solid rgba(255,255,255,.4);border-radius:50%;color:#fff;background:transparent}.slider-tools button:hover{background:var(--lime);color:var(--ink)}.progress{font-size:13px;color:#d8f36b}
        .intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}.intro-visual{position:relative}.intro-visual img{width:82%;height:390px;object-fit:cover;border-radius:20px;box-shadow:var(--shadow)}.signal-card{position:absolute;right:0;bottom:-25px;background:var(--deep);color:#fff;border-radius:16px;padding:22px;width:245px;box-shadow:var(--shadow)}.signal-card b{font-size:28px;color:var(--lime);display:block}.signal-card small{color:#c6cbc5}.feature-list{list-style:none;margin-top:28px}.feature-list li{padding:14px 0 14px 31px;border-bottom:1px solid var(--line);position:relative}.feature-list li:before{content:"✓";position:absolute;left:0;color:var(--purple);font-weight:bold}.proofs{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px}.badge{border:1px solid var(--line);padding:7px 12px;border-radius:30px;font-size:12px;color:#596067;background:#fff}
        .advantage-layout{display:grid;grid-template-columns:260px 1fr;gap:60px}.advantage-intro{position:sticky;top:145px;height:max-content}.adv-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.adv-card{padding:27px;border:1px solid var(--line);background:#fff;border-radius:14px;min-height:180px;transition:.25s;position:relative}.adv-card:hover{border-color:var(--purple);transform:translateY(-4px);box-shadow:var(--shadow)}.adv-card:nth-child(2),.adv-card:nth-child(5){margin-top:30px}.num{color:var(--purple);font-weight:900;font-size:13px;display:block;margin-bottom:18px}.adv-card p{font-size:14px;margin-top:9px}
        .product-row{display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:16px;align-items:stretch}.product{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px;position:relative;overflow:hidden}.product.featured{background:var(--purple);color:#fff;min-height:345px}.product.featured p,.product.featured .product-note{color:#e7e0ff}.product img{height:145px;width:100%;object-fit:cover;border-radius:12px;margin:24px 0}.product-tags{display:flex;gap:7px;flex-wrap:wrap;margin:20px 0}.product-tags span{font-size:12px;padding:5px 9px;background:#f0f0ec;border-radius:5px}.featured .product-tags span{background:rgba(255,255,255,.16);color:#fff}.text-link{color:var(--purple);font-weight:800;font-size:14px}.featured .text-link{color:var(--lime)}.product-note{font-size:13px;color:var(--muted)}
        .scene-wrap{display:grid;grid-template-columns:250px 1fr;gap:0;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.scene-tabs{background:#22262c;padding:22px 0}.scene-tab{display:block;width:100%;padding:17px 25px;text-align:left;background:transparent;color:#aeb5b3;border-left:3px solid transparent}.scene-tab.active,.scene-tab:hover{color:#fff;border-color:var(--lime);background:#30353b}.scene-panel{padding:40px}.scene-panel h3{font-size:29px;margin-bottom:10px}.risk-path{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:35px}.path-node{padding:18px 14px;border:1px solid var(--line);border-radius:10px;position:relative}.path-node:not(:last-child):after{content:"→";position:absolute;right:-17px;top:28px;color:var(--purple);z-index:2}.path-node b{display:block;font-size:13px;color:var(--purple);margin-bottom:8px}.path-node span{font-size:13px;color:var(--muted)}
        .dark-band{background:var(--deep);color:#fff}.dark-band p{color:#bbc0bc}.compare{display:grid;grid-template-columns:1fr 1fr;gap:0;margin-top:40px;border:1px solid #41464c;border-radius:16px;overflow:hidden}.compare>div{padding:35px}.compare>div+div{background:#262b31;border-left:1px solid #41464c}.compare h3{margin-bottom:22px}.compare li{list-style:none;padding:11px 0;border-bottom:1px solid #40454b;color:#bec3c0}.compare li strong{color:var(--lime);margin-right:9px}.dark-number{font-size:76px;color:var(--lime);font-weight:900;line-height:1}
        .story-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}.story-main{background:#fff;border-radius:18px;padding:40px;min-height:300px;border:1px solid var(--line)}.story-main blockquote{font-size:26px;line-height:1.5;margin:25px 0;color:#30353a}.story-side{display:grid;gap:18px}.story-side div{background:#d8f36b;border-radius:18px;padding:27px}.story-side div:last-child{background:#e4d9ff}.story-label{font-size:12px;font-weight:800;color:#596056}
        .stats{background:#cfdff5;padding:52px 0}.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.stat{border-left:2px solid var(--purple);padding-left:20px}.stat strong{font-size:42px;display:block;letter-spacing:-.06em}.stat span{font-size:13px;color:#59616b}
        .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.review{background:#fff;padding:30px;border:1px solid var(--line);border-radius:14px;min-height:220px}.quote{font-size:43px;color:var(--purple);line-height:.8}.review p{margin:18px 0;font-size:15px}.review small{font-weight:800;color:#464c50}
        .insight-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:16px}.insight{background:#fff;border:1px solid var(--line);border-radius:15px;overflow:hidden}.insight img{width:100%;height:170px;object-fit:cover}.insight-body{padding:22px}.insight h3{font-size:18px;margin:9px 0}.insight p{font-size:14px}.date{font-size:12px;color:#8a9090}.topic{color:var(--purple);font-size:12px;font-weight:800}
        .faq-contact{display:grid;grid-template-columns:1fr 1fr;gap:70px}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;display:flex;justify-content:space-between;text-align:left;padding:20px 0;background:transparent;font-weight:800;color:var(--ink);font-size:16px}.faq-q span{color:var(--purple);font-size:22px;transition:.2s}.faq-a{max-height:0;overflow:hidden;transition:.3s;color:var(--muted);font-size:14px}.faq-item.open .faq-a{max-height:180px;padding:0 30px 20px 0}.faq-item.open .faq-q span{transform:rotate(45deg)}.contact-box{background:var(--deep);color:#fff;border-radius:18px;padding:35px}.contact-box p{color:#c6cbc8;margin-bottom:22px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}.form-field{display:flex;flex-direction:column;gap:6px}.form-field.full{grid-column:1/-1}.form-field label{font-size:12px;color:#c6cbc8}.form-field input,.form-field textarea{background:#252a30;border:1px solid #4a5055;border-radius:7px;padding:12px;color:#fff;outline:0}.form-field textarea{min-height:92px;resize:vertical}.form-field input:focus,.form-field textarea:focus{border-color:var(--lime);box-shadow:0 0 0 3px rgba(216,243,107,.15)}.form-note{font-size:11px;color:#9ca39f;margin-top:13px}.submit{width:100%;margin-top:18px;background:var(--lime);color:#1e231f;padding:13px;border-radius:8px;font-weight:800}.submit:hover{background:#efffa8}.form-status{font-size:13px;color:var(--lime);margin-top:9px;min-height:22px}
        footer{background:#111419;color:#c4c9c5;padding:55px 0 25px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:30px}.footer-brand{font-size:22px;font-weight:900;color:#fff;margin-bottom:13px}.footer-title{font-weight:800;color:#fff;margin-bottom:14px}.footer-col a,.footer-col span{display:block;font-size:13px;color:#a6ada9;margin:8px 0}.copyright{border-top:1px solid #30353a;margin-top:40px;padding-top:20px;font-size:12px;color:#858c88;display:flex;justify-content:space-between;gap:20px}
        :focus-visible{outline:3px solid var(--orange);outline-offset:3px}
        @media(max-width:1024px){.intro-grid,.story-grid{gap:35px}.nav-links{gap:14px}.slider-tools{right:24px}.advantage-layout{grid-template-columns:190px 1fr}.product-row{grid-template-columns:1fr 1fr}.product.featured{grid-column:1/-1}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}}
        @media(max-width:768px){.container{width:min(100% - 40px,var(--max))}.nav-main{height:65px}.menu-btn{display:block;margin-left:auto}.nav-links{display:none;position:absolute;left:20px;right:20px;top:65px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0}.nav-links.open{display:flex}.nav-links a,.nav-links .nav-cta{padding:12px}.nav-cta{text-align:center}.nav-sub{display:none}.hero,.hero-content{min-height:620px}.hero-content{padding:80px 0}.hero h1{font-size:44px}.hero p{font-size:16px}.section{padding:78px 0}.intro-grid,.advantage-layout,.faq-contact{grid-template-columns:1fr}.advantage-intro{position:static}.adv-card:nth-child(2),.adv-card:nth-child(5){margin-top:0}.scene-wrap{grid-template-columns:1fr}.scene-tabs{display:flex;overflow:auto;padding:0}.scene-tab{min-width:145px;padding:15px}.scene-panel{padding:25px}.risk-path{grid-template-columns:1fr 1fr}.path-node:not(:last-child):after{display:none}.story-grid,.insight-grid{grid-template-columns:1fr}.stat-row{grid-template-columns:1fr 1fr}.review-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}}
        @media(max-width:480px){.container{width:calc(100% - 40px)}.hero h1{font-size:38px}.hero-meta{gap:16px;margin-top:35px}.hero-meta strong{font-size:21px}.intro-visual img{width:100%;height:300px}.signal-card{position:relative;right:auto;bottom:auto;margin:-35px 15px 0;width:auto}.adv-grid,.product-row,.stat-row,.form-grid{grid-template-columns:1fr}.product.featured{grid-column:auto}.compare{grid-template-columns:1fr}.compare>div+div{border-left:0;border-top:1px solid #41464c}.dark-number{font-size:55px}.footer-grid{grid-template-columns:1fr}.slider-tools{bottom:20px}.hero-actions .btn{width:100%}}