/* roulang page: index */
:root{--blue:#2f6bff;--blue-dark:#2054d5;--blue-soft:#edf3ff;--coral:#ff8066;--ink:#1e293b;--muted:#64748b;--line:#e5eaf2;--paper:#fff;--bg:#f7f9fc;--radius:16px;--shadow:0 8px 24px rgba(30,41,59,.07);--shadow-hover:0 14px 32px rgba(30,41,59,.12);--content:1200px}
    *{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75}a{color:inherit;text-decoration:none;transition:color .2s,background .2s,transform .2s,box-shadow .2s}img{max-width:100%;display:block}button,input,textarea,select{font:inherit}button,a,input,textarea,select{outline-offset:4px}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(47,107,255,.35)}.container{max-width:var(--content);width:calc(100% - 48px);margin-inline:auto}.site-header{height:76px;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;transition:box-shadow .2s}.site-header.scrolled{box-shadow:0 5px 20px rgba(30,41,59,.08)}.nav-row{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:11px;font-size:20px;font-weight:800;letter-spacing:.01em;white-space:nowrap}.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--blue);position:relative;display:inline-block;transform:rotate(-5deg)}.brand-mark:before,.brand-mark:after{content:"";position:absolute;background:#fff;border-radius:2px;transform:skew(-18deg)}.brand-mark:before{width:6px;height:18px;left:10px;top:8px}.brand-mark:after{width:6px;height:13px;left:19px;top:11px;opacity:.68}.desktop-nav{display:flex;align-items:center;gap:28px;margin-left:auto}.desktop-nav a{font-size:14px;color:#475569;font-weight:600}.desktop-nav a:hover,.desktop-nav a.active{color:var(--blue)}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border:1px solid transparent;border-radius:8px;background:var(--blue);color:#fff;font-size:14px;font-weight:700;cursor:pointer;transition:all .2s}.button:hover{background:var(--blue-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 18px rgba(47,107,255,.2)}.button.secondary{background:#fff;color:var(--blue);border-color:#cbd9ff}.button.secondary:hover{background:var(--blue-soft);color:var(--blue)}.button.small{min-height:40px;padding:0 16px}.menu-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink);font-size:22px;cursor:pointer}.mobile-nav{display:none}
    main{overflow:hidden}.section{padding:88px 0}.section.alt{background:#fff}.section-head{max-width:720px;margin-bottom:34px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;margin-bottom:12px}.eyebrow:before{content:"";width:22px;height:2px;background:var(--coral);border-radius:3px}.section h2{font-size:34px;line-height:1.3;letter-spacing:-.035em;margin:0 0 13px;font-weight:800}.section-head p{margin:0;color:var(--muted);font-size:15px;max-width:690px}.hero{padding:54px 0 40px;background:#fff}.hero-layout{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;min-height:440px}.hero-copy .brand{margin-bottom:26px}.hero h1{font-size:49px;line-height:1.2;letter-spacing:-.045em;margin:0 0 20px;font-weight:850;max-width:650px}.hero-copy>p{font-size:16px;color:var(--muted);max-width:610px;margin:0 0 24px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:24px}.hero-notes{display:flex;gap:10px;flex-wrap:wrap}.pill{font-size:12px;font-weight:700;color:#49617f;background:#f1f5fb;border-radius:5px;padding:6px 10px}.pill.blue{color:#2855c5;background:#edf3ff}.pill.coral{color:#a74937;background:#fff0ec}.hero-visual{position:relative;min-height:370px}.hero-photo{position:absolute;inset:0 38px 28px 0;height:330px;width:calc(100% - 38px);object-fit:cover;border-radius:22px;box-shadow:var(--shadow)}.hero-caption{position:absolute;right:0;bottom:0;width:55%;padding:20px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.hero-caption strong{display:block;font-size:17px;margin-bottom:5px}.hero-caption span{color:var(--muted);font-size:13px}.visual-stamp{position:absolute;left:-16px;top:22px;background:var(--coral);color:#fff;font-size:12px;font-weight:800;padding:9px 13px;border-radius:7px;box-shadow:var(--shadow)}
    .quick-strip{padding:24px 0;background:#f4f7fd;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.quick-inner{display:grid;grid-template-columns:repeat(5,1fr);gap:0}.quick-link{padding:7px 18px;border-right:1px solid #dfe6f1;display:flex;gap:12px;align-items:center}.quick-link:first-child{padding-left:0}.quick-link:last-child{border:0}.quick-no{color:var(--blue);font-weight:800;font-size:12px}.quick-link strong{display:block;font-size:14px}.quick-link small{display:block;color:var(--muted);font-size:11px}
    .services-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:18px}.service-card,.panel,.case-card,.scene-card,.deliver-card,.partner-box,.article-feature,.article-row,.step-card,.solution-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}.service-card:hover,.case-card:hover,.article-row:hover,.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}.service-card{padding:25px;min-height:245px;position:relative;overflow:hidden}.service-card.featured{grid-row:span 2;background:linear-gradient(145deg,#fff 55%,#f1f5ff);padding:30px;min-height:508px}.service-number{font-size:12px;color:var(--blue);font-weight:800;letter-spacing:.1em}.service-card h3{font-size:21px;margin:18px 0 8px;line-height:1.4}.service-card p{color:var(--muted);font-size:14px;margin:0 0 16px}.service-meta{font-size:12px;color:#52637a;border-top:1px solid var(--line);padding-top:13px}.text-link{display:inline-flex;align-items:center;gap:7px;color:var(--blue);font-size:13px;font-weight:750;margin-top:13px}.text-link:hover{gap:11px;color:var(--blue-dark)}.service-art{margin:26px -30px 0;height:188px;overflow:hidden}.service-art img{width:100%;height:100%;object-fit:cover}
    .solution-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.solution-card{display:grid;grid-template-columns:54px 1fr;gap:16px;padding:24px}.solution-index{height:48px;width:48px;border-radius:12px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-weight:800}.solution-card h3{font-size:18px;margin:0 0 7px}.solution-card p{font-size:14px;color:var(--muted);margin:0}.solution-foot{margin-top:13px;color:#52637a;font-size:12px}
    .metrics{background:#f1f5fc;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}.metric{padding:22px 25px;border-right:1px solid #dbe3ef}.metric:last-child{border:0}.metric b{display:block;color:var(--blue);font-size:26px;line-height:1.3;margin-bottom:5px}.metric strong{display:block;font-size:14px}.metric span{display:block;color:var(--muted);font-size:12px;margin-top:4px}
    .scene-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:16px}.scene-card{padding:24px;min-height:190px}.scene-card:first-child{background:#f2f6ff}.scene-card h3{font-size:18px;margin:12px 0 7px}.scene-card p{font-size:13px;color:var(--muted);margin:0}.scene-tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:15px}.scene-tags span{font-size:11px;color:#51647e;padding:4px 8px;border-radius:4px;background:#f1f5fa}
    .process{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;position:relative}.process:before{content:"";position:absolute;left:7%;right:7%;top:25px;height:1px;background:#cbd8f2}.step-card{position:relative;padding:18px 17px;box-shadow:none}.step-top{display:flex;align-items:center;gap:10px;position:relative}.step-circle{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:white;font-size:12px;font-weight:800;box-shadow:0 0 0 6px var(--bg)}.step-card h3{font-size:16px;margin:16px 0 7px}.step-card p{color:var(--muted);font-size:12px;margin:0}.step-card small{display:block;color:#4c5f7b;margin-top:10px;font-size:11px}
    .deliver-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.deliver-card{padding:20px}.deliver-icon{width:40px;height:40px;border-radius:10px;background:#edf3ff;color:var(--blue);display:grid;place-items:center;font-weight:800;font-size:17px}.deliver-card h3{font-size:16px;margin:14px 0 5px}.deliver-card p{font-size:12px;color:var(--muted);margin:0}.deliver-card small{display:block;font-size:11px;color:#50627b;margin-top:10px}
    .case-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:16px}.case-card{overflow:hidden}.case-card.lead{grid-row:span 2}.case-cover{height:155px;background:#eaf0fa;position:relative;overflow:hidden}.case-card.lead .case-cover{height:255px}.case-cover img{height:100%;width:100%;object-fit:cover;transition:transform .3s}.case-card:hover .case-cover img{transform:scale(1.025)}.case-cover-label{position:absolute;left:14px;top:14px;background:#fff;color:var(--blue);padding:5px 9px;border-radius:4px;font-size:11px;font-weight:750}.case-body{padding:18px}.case-body h3{font-size:17px;margin:8px 0}.case-body p{font-size:13px;color:var(--muted);margin:0}.case-tags{display:flex;gap:6px;flex-wrap:wrap}.case-tags span{font-size:10px;color:#4b6487;background:#f1f5fb;padding:4px 7px;border-radius:4px}.case-card .text-link{margin-top:10px}
    .story-band{display:grid;grid-template-columns:.9fr 1.1fr;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}.story-image{min-height:330px}.story-image img{width:100%;height:100%;object-fit:cover}.story-copy{padding:32px}.story-copy h3{font-size:23px;line-height:1.4;margin:8px 0 12px}.story-copy>p{color:var(--muted);font-size:14px}.story-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:20px}.story-step{padding:12px;background:#f6f8fc;border-radius:9px}.story-step b{display:block;color:var(--blue);font-size:12px}.story-step span{font-size:11px;color:var(--muted)}
    .news-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:22px}.article-feature{overflow:hidden}.article-feature img{height:220px;width:100%;object-fit:cover}.article-feature .article-content{padding:23px}.article-content h3{font-size:20px;line-height:1.45;margin:9px 0}.article-content p{font-size:13px;color:var(--muted);margin:0}.article-meta{font-size:11px;color:#718096;display:flex;gap:10px;align-items:center}.article-list{display:flex;flex-direction:column;gap:10px}.article-row{padding:15px 17px;box-shadow:none;display:grid;grid-template-columns:72px 1fr;gap:13px;align-items:start}.article-date{color:var(--blue);font-size:11px;font-weight:800;padding-top:3px}.article-row h3{font-size:14px;margin:0 0 4px;line-height:1.5}.article-row p{font-size:11px;color:var(--muted);margin:0}
    .partner-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.partner-box{padding:20px;text-align:center;box-shadow:none}.partner-mark{width:40px;height:40px;border:1px solid #dbe4f2;border-radius:12px;margin:0 auto 11px;display:grid;place-items:center;color:var(--blue);font-weight:800}.partner-box strong{display:block;font-size:14px}.partner-box p{font-size:11px;color:var(--muted);margin:4px 0 0}
    .faq-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:50px}.faq-side{position:sticky;top:110px;align-self:start}.faq-side p{color:var(--muted);font-size:14px}.accordion{margin:0;background:transparent;border:0}.accordion-item{background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:10px;overflow:hidden}.accordion-title{font-weight:700;color:var(--ink);font-size:15px;padding:17px 48px 17px 18px;border:0}.accordion-title:hover,.accordion-title:focus{background:#f6f8fc;color:var(--blue)}.accordion-title::before{right:18px;color:var(--blue)}.accordion-content{border:0;padding:0 18px 18px;color:var(--muted);font-size:13px}
    .assurance{padding:30px 0;background:#eef4ff;border-top:1px solid #dce7ff;border-bottom:1px solid #dce7ff}.assurance-row{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.assurance-item{display:flex;gap:12px;align-items:flex-start}.assurance-icon{flex:0 0 34px;width:34px;height:34px;background:#fff;border:1px solid #d6e2ff;border-radius:9px;display:grid;place-items:center;color:var(--blue);font-weight:800}.assurance-item strong{font-size:13px;display:block}.assurance-item span{font-size:11px;color:var(--muted);display:block;margin-top:3px}
    .contact-section{padding:82px 0}.contact-panel{background:#edf4ff;border:1px solid #d9e6ff;border-radius:20px;padding:42px;display:grid;grid-template-columns:.85fr 1.15fr;gap:40px}.contact-copy h2{font-size:31px;margin:0 0 13px;line-height:1.3}.contact-copy p{color:#5b6d86;font-size:14px}.contact-note{margin-top:24px;padding:15px 17px;background:rgba(255,255,255,.8);border-radius:10px;font-size:13px;color:#475569}.contact-form{display:grid;grid-template-columns:1fr 1fr;gap:13px}.field.full{grid-column:1/-1}.field label{display:block;font-size:12px;font-weight:700;margin-bottom:6px}.field input,.field textarea,.field select{width:100%;border:1px solid #d5deed;border-radius:7px;background:#fff;padding:11px 12px;min-height:44px;font-size:13px;color:var(--ink);box-shadow:none}.field textarea{min-height:92px;resize:vertical}.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,107,255,.12)}.form-submit{grid-column:1/-1;display:flex;align-items:center;gap:14px}.form-submit small{font-size:11px;color:var(--muted)}
    .site-footer{background:#fff;border-top:1px solid var(--line);padding:48px 0 20px}.footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr 1fr;gap:34px;padding-bottom:32px}.footer-brand p{max-width:290px;font-size:13px;color:var(--muted);margin:15px 0}.footer-col h3{font-size:13px;margin:0 0 13px}.footer-col a,.footer-col span{display:block;font-size:12px;color:var(--muted);margin:7px 0}.footer-col a:hover{color:var(--blue)}.footer-bottom{border-top:1px solid var(--line);padding-top:16px;display:flex;justify-content:space-between;gap:15px;color:#8490a2;font-size:11px}.footer-bottom a{color:#6c788b}
    @media(max-width:1024px){.container{width:calc(100% - 40px)}.desktop-nav{gap:16px}.desktop-nav a{font-size:13px}.hero-layout{gap:32px}.hero h1{font-size:42px}.services-grid{grid-template-columns:1fr 1fr}.service-card.featured{grid-row:auto;min-height:380px}.scene-grid{grid-template-columns:repeat(2,1fr)}.scene-card:first-child{grid-column:span 2}.process{grid-template-columns:repeat(3,1fr)}.process:before{display:none}.deliver-grid{grid-template-columns:repeat(2,1fr)}.case-grid{grid-template-columns:1fr 1fr}.case-card.lead{grid-row:span 2}.footer-grid{grid-template-columns:1fr 1fr}}
    @media(max-width:767px){html{scroll-padding-top:72px}.container{width:calc(100% - 36px)}.site-header{height:66px}.brand{font-size:17px}.brand-mark{width:31px;height:31px}.desktop-nav,.header-cta{display:none}.menu-toggle{display:inline-grid;place-items:center}.mobile-nav{position:absolute;top:65px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:10px 18px 18px;box-shadow:0 12px 24px rgba(30,41,59,.1)}.mobile-nav.open{display:block}.mobile-nav a{display:block;padding:12px 8px;border-bottom:1px solid #f0f2f6;font-size:14px;font-weight:650}.mobile-nav .button{margin-top:12px;color:#fff;display:flex}.section{padding:60px 0}.section h2{font-size:28px}.section-head{margin-bottom:25px}.hero{padding:37px 0 30px}.hero-layout{grid-template-columns:1fr;gap:26px;min-height:0}.hero .brand{margin-bottom:18px}.hero h1{font-size:36px;max-width:620px}.hero-copy>p{font-size:14px}.hero-visual{min-height:300px}.hero-photo{height:270px;inset:0 22px 20px 0;width:calc(100% - 22px)}.hero-caption{width:63%;padding:14px}.hero-caption strong{font-size:14px}.quick-inner{grid-template-columns:repeat(2,1fr);gap:8px}.quick-link{padding:10px!important;border:0;background:#fff;border-radius:8px}.services-grid{grid-template-columns:1fr}.service-card,.service-card.featured{min-height:0;padding:22px}.service-art{margin:22px -22px -22px;height:150px}.solution-list{grid-template-columns:1fr}.metric-grid{grid-template-columns:1fr 1fr}.metric{padding:17px;border-bottom:1px solid #dbe3ef}.metric:nth-child(2){border-right:0}.metric:nth-child(n+3){border-bottom:0}.metric b{font-size:23px}.scene-grid{grid-template-columns:1fr 1fr}.scene-card:first-child{grid-column:span 2}.process{grid-template-columns:1fr 1fr}.step-card{padding:15px}.deliver-grid{grid-template-columns:1fr 1fr}.case-grid{grid-template-columns:1fr 1fr}.case-card.lead{grid-column:1/-1;grid-row:auto}.case-card.lead .case-cover{height:210px}.story-band{grid-template-columns:1fr}.story-image{min-height:230px;height:230px}.story-copy{padding:24px}.news-layout{grid-template-columns:1fr}.partner-grid{grid-template-columns:1fr 1fr}.faq-layout{grid-template-columns:1fr;gap:20px}.faq-side{position:static}.assurance-row{grid-template-columns:1fr 1fr;gap:18px}.contact-section{padding:58px 0}.contact-panel{padding:25px 20px;grid-template-columns:1fr;gap:24px}.contact-copy h2{font-size:27px}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-brand{grid-column:1/-1}.footer-bottom{flex-direction:column}}
    @media(max-width:520px){.container{width:calc(100% - 30px)}.hero h1{font-size:32px}.hero-actions .button{flex:1}.hero-visual{min-height:260px}.hero-photo{height:230px}.visual-stamp{left:-5px;top:14px}.quick-inner{grid-template-columns:1fr 1fr}.quick-link{gap:8px}.quick-link strong{font-size:12px}.quick-link small{font-size:10px}.scene-grid{grid-template-columns:1fr}.scene-card:first-child{grid-column:auto}.process{grid-template-columns:1fr}.step-card{display:grid;grid-template-columns:40px 1fr;column-gap:12px}.step-top{grid-row:span 3;align-items:start}.step-card h3{margin:0 0 5px}.step-card p,.step-card small{grid-column:2}.case-grid{grid-template-columns:1fr}.case-card.lead{grid-column:auto}.case-cover,.case-card.lead .case-cover{height:200px}.story-steps{grid-template-columns:1fr}.article-row{grid-template-columns:60px 1fr}.contact-form{grid-template-columns:1fr}.field.full,.form-submit{grid-column:auto}.form-submit{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.assurance-row{gap:14px}.assurance-item{gap:8px}.assurance-item span{font-size:10px}}
    @media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}