/* roulang page: index */
:root{
  --blue:#2F6FA8;
  --blue-dark:#245A8A;
  --blue-deep:#1E4E78;
  --blue-soft:#E8F1F8;
  --green:#1C9B6E;
  --green-dark:#157A56;
  --green-soft:#E7F6EF;
  --amber:#C9842A;
  --bg:#F4F7FB;
  --card:#FFFFFF;
  --line:#E6EEF5;
  --ink:#1A2B3C;
  --muted:#5B6B7C;
  --faint:#8A97A6;
  --dark:#12343C;
  --dark-2:#0E2A30;
  --light:#F7FBFD;
  --radius:10px;
  --radius-sm:8px;
  --radius-pill:999px;
  --shadow:0 8px 24px rgba(20,40,70,.06);
  --shadow-hover:0 12px 32px rgba(20,40,70,.10);
  --shadow-soft:0 4px 12px rgba(20,40,70,.04);
  --space:96px;
  --gutter:32px;
  --max:1220px;
  --topbar:40px;
  --nav:68px;
  --font:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"DIN Alternate","Tabular Numbers","Roboto Mono","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg);font-weight:400}
img{max-width:100%;height:auto;display:block;border:0}
a{color:var(--blue);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--blue-deep)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--blue);outline-offset:3px
}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.skip{position:absolute;left:-999px;top:8px;background:#fff;padding:8px 12px;z-index:10000}
.skip:focus{left:8px}
.num{font-family:var(--mono);font-weight:600;letter-spacing:.02em;font-variant-numeric:tabular-nums}

.topbar{height:var(--topbar);background:#E8F1F8;color:#35556B;font-size:13px;display:flex;align-items:center;border-bottom:1px solid #D7E4EF}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-left{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.topbar-left span{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.topbar a{color:#35556B}
.topbar a:hover{color:var(--blue-deep)}
.topbar-btn{height:28px;padding:0 12px;border-radius:6px;background:var(--blue);color:#fff !important;font-size:12px;font-weight:500;display:inline-flex;align-items:center;min-height:28px}
.topbar-btn:hover{background:var(--blue-dark);color:#fff !important}
.ico{width:14px;height:14px;flex:0 0 14px}

.site-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.96);backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(20,40,70,.02)}
.nav-main{height:var(--nav);display:flex;align-items:center}
.nav-main .container{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);min-height:44px}
.brand:hover{color:var(--ink)}
.brand-mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(180deg,var(--blue),var(--blue-deep));display:grid;place-items:center;color:#fff;box-shadow:0 6px 14px rgba(47,111,168,.25)}
.brand-text{display:flex;align-items:center;gap:8px}
.brand-short{font-weight:600;font-size:18px;letter-spacing:.04em}
.brand-split{width:1px;height:16px;background:#C5D4E2}
.brand-key{font-weight:500;font-size:16px;color:var(--blue-deep)}
.nav-list{display:flex;align-items:center;gap:6px}
.nav-list a{display:inline-flex;align-items:center;min-height:44px;padding:0 12px;color:var(--ink);font-size:15px;font-weight:500;border-radius:8px;position:relative}
.nav-list a:hover{color:var(--blue);background:var(--blue-soft)}
.nav-list a.active{color:var(--blue-deep)}
.nav-list a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:8px;height:2px;background:var(--green);border-radius:2px}
.nav-cta{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;background:var(--blue);color:#fff !important;border-radius:8px;font-weight:500;box-shadow:0 6px 16px rgba(47,111,168,.22)}
.nav-cta:hover{background:var(--blue-dark);transform:translateY(-1px)}
.nav-cta:active{transform:translateY(0)}
.menu-toggle{display:none;width:44px;height:44px;border-radius:8px;border:1px solid var(--line);align-items:center;justify-content:center;flex-direction:column;gap:5px}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}
.drawer{position:fixed;inset:0;background:rgba(18,52,60,.46);z-index:90;opacity:0;pointer-events:none;transition:opacity .2s ease}
.drawer.open{opacity:1;pointer-events:auto}
.drawer-panel{position:absolute;right:0;top:0;height:100%;width:min(86vw,360px);background:#fff;padding:24px 20px;box-shadow:-12px 0 32px rgba(20,40,70,.12);transform:translateX(100%);transition:transform .25s ease;overflow:auto}
.drawer.open .drawer-panel{transform:none}
.drawer-top{font-size:13px;color:var(--muted);padding-bottom:16px;border-bottom:1px solid var(--line);display:grid;gap:8px}
.drawer-links{display:grid;gap:4px;margin-top:16px}
.drawer-links a{display:flex;align-items:center;min-height:44px;padding:0 12px;border-radius:8px;color:var(--ink);font-weight:500}
.drawer-links a:hover,.drawer-links a:active{background:var(--blue-soft);color:var(--blue-deep)}
.drawer-close{position:absolute;top:12px;right:12px;width:44px;height:44px;border-radius:8px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:8px;font-weight:500;transition:background .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease;border:1px solid transparent}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(47,111,168,.22)}
.btn-primary:hover{background:var(--blue-dark);color:#fff}
.btn-ghost{background:#fff;color:var(--blue-deep);border-color:#B7CEE3}
.btn-ghost:hover{border-color:var(--blue);background:var(--blue-soft);color:var(--blue-deep)}
.btn-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-light:hover{background:rgba(255,255,255,.1);color:#fff}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover{background:var(--green-dark);color:#fff}
.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:var(--radius-pill);background:var(--green-soft);color:var(--green-dark);font-size:12px;font-weight:500}
.badge-blue{background:var(--blue-soft);color:var(--blue-deep)}
.badge-amber{background:#F8EFDD;color:#8A5A12}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--blue);min-height:44px}
.link-more:hover{color:var(--blue-deep)}
.link-more::after{content:"→"}

.hero{position:relative;overflow:hidden;background:#0F2C38;color:#fff}
.hero-track{position:relative;min-height:640px}
.hero-slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .6s ease,visibility .6s ease}
.hero-slide.is-active{opacity:1;visibility:visible;position:relative}
.hero-slide img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-mask{position:absolute;inset:0;background:linear-gradient(90deg,rgba(12,34,42,.72) 0%,rgba(18,52,60,.48) 48%,rgba(18,52,60,.28) 100%)}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:48px 48px;opacity:.35;pointer-events:none}
.hero-arc{position:absolute;right:-80px;top:40px;width:420px;height:420px;border:1px solid rgba(255,255,255,.14);border-radius:50%;pointer-events:none}
.hero-arc::after{content:"";position:absolute;inset:48px;border:1px solid rgba(28,155,110,.35);border-radius:50%}
.hero-content{position:relative;z-index:2;padding:72px 0 128px;max-width:760px}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;color:#D5E8F2;margin-bottom:16px}
.hero h1,.slide-title{font-size:44px;line-height:1.22;font-weight:600;letter-spacing:.01em;margin-bottom:16px}
.hero-lead{font-size:16px;line-height:1.8;color:#E6EEF2;max-width:640px;margin-bottom:20px}
.hero-points{display:grid;gap:8px;margin:0 0 24px;max-width:560px}
.hero-points li{position:relative;padding-left:18px;color:#F2F7FA;font-size:15px}
.hero-points li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;background:var(--green)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-ctrl{position:absolute;top:50%;transform:translateY(-50%);z-index:3;width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.25);display:grid;place-items:center}
.hero-ctrl:hover{background:rgba(255,255,255,.28)}
.hero-prev{left:16px}
.hero-next{right:16px}
.hero-dots{position:absolute;left:50%;bottom:86px;transform:translateX(-50%);z-index:3;display:flex;gap:8px;align-items:center}
.hero-dots button{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.35);min-height:10px}
.hero-dots button.is-on{width:28px;border-radius:8px;background:#fff}
.hero-pause{position:absolute;right:24px;bottom:86px;z-index:3;min-height:32px;padding:0 10px;border-radius:6px;color:#fff;border:1px solid rgba(255,255,255,.3);font-size:12px}
.metric-bar{position:absolute;left:0;right:0;bottom:0;z-index:3;background:rgba(244,247,251,.92);color:var(--ink);border-top:1px solid rgba(230,238,245,.8)}
.metric-bar .container{display:grid;grid-template-columns:repeat(3,1fr);min-height:72px}
.metric-item{display:flex;flex-direction:column;justify-content:center;padding:12px 18px;border-right:1px solid var(--line)}
.metric-item:last-child{border-right:0}
.metric-item strong{font-size:18px;font-weight:600;color:var(--blue-deep)}
.metric-item span{font-size:13px;color:var(--muted)}

.section{padding:var(--space) 0;position:relative}
.section-alt{background:#fff;border-block:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{font-size:30px;line-height:1.3;font-weight:600;margin:10px 0 12px}
.section-head p{color:var(--muted);font-size:16px;line-height:1.8}
.kicker{font-size:13px;font-weight:500;color:var(--green-dark);letter-spacing:.06em}

.split{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center}
.split-media{position:relative}
.split-media img{width:100%;height:460px;object-fit:cover;border-radius:12px;box-shadow:var(--shadow)}
.split-ticket{position:absolute;left:16px;bottom:16px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px;box-shadow:var(--shadow);min-width:210px}
.split-ticket b{display:block;font-size:14px}
.split-ticket span{font-size:12px;color:var(--muted)}
.fact-list{display:grid;gap:12px;margin-top:22px}
.fact-list li{padding:12px 14px;border:1px dashed #D5E3EE;border-radius:8px;background:#FBFDFE}
.fact-list strong{display:block;font-size:14px;font-weight:600}
.fact-list span{font-size:13px;color:var(--muted)}

.bento{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(170px,auto);gap:16px}
.bento-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:8px;transition:transform .2s ease,box-shadow .2s ease}
.bento-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.bento-card.wide{grid-column:span 2;grid-row:span 2;background:linear-gradient(180deg,#fff 0%,#F3F8FC 100%);border-color:#D3E4F2}
.bento-card h3{font-size:20px;font-weight:600}
.bento-card p{color:var(--muted);font-size:15px;line-height:1.7;flex:1}
.bento-card .tag{align-self:flex-start}

.adv-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:16px}
.adv-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease}
.adv-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.adv-card.grow{grid-row:span 2;display:flex;flex-direction:column;justify-content:space-between;background:
  linear-gradient(180deg,rgba(255,255,255,.92),rgba(255,255,255,.88)),
  url("/assets/images/12a483d67fff9632.jpg") center/cover}
.adv-icon{width:40px;height:40px;border-radius:10px;background:var(--blue-soft);display:grid;place-items:center;margin-bottom:14px;color:var(--blue-deep)}
.adv-card h3{font-size:18px;margin-bottom:8px;font-weight:600}
.adv-card p{color:var(--muted);font-size:15px}

.product-stage{display:grid;grid-template-columns:1.4fr .8fr;gap:16px}
.product-side{display:grid;gap:16px}
.product-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);display:grid;grid-template-columns:1.1fr .9fr;min-height:280px;transition:transform .2s ease,box-shadow .2s ease}
.product-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.product-card.mini{display:block;min-height:0;padding:0}
.product-copy{padding:28px}
.product-copy h3{font-size:22px;margin:8px 0 10px}
.product-copy p{color:var(--muted);margin-bottom:16px;font-size:15px}
.product-card img{width:100%;height:100%;object-fit:cover}
.product-card.mini img{height:150px}
.product-card.mini .product-copy{padding:18px 20px 20px}
.window-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
.window-card{border:1px solid var(--line);border-radius:10px;padding:14px 16px;background:#F8FBFD}
.window-card b{display:block;font-size:14px}
.window-card span{font-size:13px;color:var(--muted)}

.timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}
.timeline::before{content:"";position:absolute;left:8%;right:8%;top:28px;height:2px;background:linear-gradient(90deg,var(--blue),var(--green))}
.step{padding:0 12px;position:relative}
.step-no{width:56px;height:56px;border-radius:50%;background:#fff;border:2px solid var(--blue);display:grid;place-items:center;font-weight:600;color:var(--blue-deep);margin-bottom:16px;position:relative;z-index:1;box-shadow:var(--shadow-soft)}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:14px;color:var(--muted)}

.dark-band{background:var(--dark);color:#E7F1F3;padding:88px 0;position:relative;overflow:hidden}
.dark-band::before{content:"";position:absolute;inset:auto -10% -40% auto;width:420px;height:420px;border:1px solid rgba(28,155,110,.28);border-radius:50%}
.dark-band h2{font-size:30px;color:#fff;margin:10px 0 28px;max-width:820px}
.dark-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.quote{border-left:3px solid var(--green);padding:8px 0 8px 18px}
.quote p{font-size:16px;line-height:1.8;color:#D7E6EA}
.quote b{display:block;margin-top:10px;color:#9AD7BE;font-weight:500;font-size:13px}

.case-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.case-tile{position:relative;border-radius:12px;overflow:hidden;min-height:220px;cursor:pointer;border:1px solid var(--line);background:#fff}
.case-tile img{width:100%;height:220px;object-fit:cover;transition:transform .35s ease}
.case-tile:hover img{transform:scale(1.05)}
.case-cap{position:absolute;inset:auto 0 0 0;padding:16px;background:linear-gradient(180deg,transparent,rgba(12,34,42,.82));color:#fff;transform:translateY(18px);opacity:.92;transition:transform .25s ease,opacity .25s ease}
.case-tile:hover .case-cap,.case-tile:focus .case-cap{transform:none;opacity:1}
.case-cap h3{font-size:16px;margin-bottom:4px}
.case-cap p{font-size:13px;color:#D5E4EA}

.story-list{display:grid;gap:28px}
.story{display:grid;grid-template-columns:1.05fr 1.2fr;gap:32px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.story.reverse{grid-template-columns:1.2fr 1.05fr}
.story.reverse .story-media{order:2}
.story img{width:100%;height:320px;object-fit:cover}
.story-copy{padding:28px 28px 28px 8px}
.story.reverse .story-copy{padding:28px 8px 28px 28px}
.story h3{font-size:22px;margin:8px 0 12px}
.story p{color:var(--muted)}

.stat-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;background:linear-gradient(180deg,#F7FBFE,#EEF5FB);border:1px solid #D7E6F2;border-radius:12px;padding:28px 12px}
.stat{text-align:left;padding:8px 20px;border-right:1px solid #D7E6F2}
.stat:last-child{border-right:0}
.stat .num{display:block;font-size:36px;color:var(--blue-deep);line-height:1.1}
.stat em{font-style:normal;font-size:14px;color:var(--green-dark);font-weight:500;margin-left:4px}
.stat p{font-size:13px;color:var(--muted);margin-top:8px}

.review-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.review{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:var(--shadow)}
.review:hover{box-shadow:var(--shadow-hover)}
.stars{color:var(--amber);letter-spacing:2px;font-size:14px;margin-bottom:10px}
.review p{font-size:15px;color:var(--ink);min-height:96px}
.who{display:flex;align-items:center;gap:10px;margin-top:16px}
.avatar{width:40px;height:40px;border-radius:50%;object-fit:cover;background:var(--blue-soft);display:grid;place-items:center;font-weight:600;color:var(--blue-deep)}
.who small{display:block;color:var(--muted);font-size:12px}

.logo-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.logo-item{height:74px;border:1px solid var(--line);background:#F8FAFC;border-radius:10px;display:grid;place-items:center;color:#5E7386;font-size:14px;font-weight:500;letter-spacing:.04em}
.logo-item:hover{border-color:#C5D8E8;color:var(--blue-deep)}

.scene-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.scene{display:grid;grid-template-rows:160px auto;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);color:inherit}
.scene img{width:100%;height:160px;object-fit:cover}
.scene div{padding:18px 20px 8px}
.scene h3{font-size:18px;margin-bottom:8px}
.scene p{color:var(--muted);font-size:14px}

.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.news-card img{height:150px;width:100%;object-fit:cover}
.news-card div{padding:16px 18px 8px;flex:1;display:flex;flex-direction:column}
.news-card time{font-size:12px;color:var(--faint)}
.news-card h3{font-size:16px;margin:6px 0 8px;font-weight:600}
.news-card p{color:var(--muted);font-size:14px;flex:1}

.faq-list{display:grid;gap:10px;max-width:920px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.faq-item button{width:100%;text-align:left;padding:16px 20px;min-height:56px;font-weight:600;display:flex;justify-content:space-between;gap:16px;color:var(--ink)}
.faq-item button:hover{background:#F7FBFE}
.faq-item button span{color:var(--blue);font-weight:500}
.faq-panel{display:none;padding:0 20px 18px;background:#F7FBFE;color:var(--muted);font-size:15px;line-height:1.8}
.faq-item.open .faq-panel{display:block}
.faq-item.open button{background:#F7FBFE}

.assure-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:28px}
.assure{background:#fff;border:1px solid #D5E6F3;border-radius:10px;padding:16px 18px;display:flex;gap:12px;align-items:flex-start}
.assure b{display:block;font-size:15px}
.assure span{font-size:13px;color:var(--muted)}

.cta-panel{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);overflow:hidden}
.form-box{padding:28px}
.form-box h2{font-size:26px;margin:8px 0 10px}
.form-box > p{color:var(--muted);margin-bottom:18px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:500;color:#3E5163}
.field input,.field select,.field textarea{
  width:100%;border:1px solid #D3E0EC;border-radius:8px;background:#fff;padding:10px 12px;min-height:44px;color:var(--ink)
}
.field textarea{min-height:96px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,111,168,.15)}
.field.error input,.field.error select,.field.error textarea{border-color:#C45A4A}
.form-ok{display:none;margin-top:14px;padding:12px 14px;border-radius:8px;background:var(--green-soft);color:var(--green-dark);font-size:14px}
.form-ok.show{display:block}
.contact-side{background:linear-gradient(180deg,#12343C,#1A4650);color:#E6F1F4;padding:32px 28px}
.contact-side h3{font-size:20px;color:#fff;margin-bottom:12px}
.contact-side p{color:#C5D9DE;margin-bottom:18px}
.contact-side dl{display:grid;gap:12px}
.contact-side dt{font-size:12px;color:#9CB8BF}
.contact-side dd{margin:0;font-size:15px;color:#fff}
.contact-side a{color:#fff}

.site-footer{background:#0F2A32;color:#C9D9DE;padding:56px 0 24px;border-top:3px solid var(--green)}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:28px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.08)}
.site-footer h3{color:#fff;font-size:16px;margin-bottom:12px}
.site-footer p,.site-footer li,.site-footer a{font-size:14px;color:#C9D9DE}
.site-footer a:hover{color:#fff}
.site-footer ul{display:grid;gap:8px}
.copyright{padding-top:18px;font-size:13px;color:#8AA3AA;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

.overlay{position:fixed;inset:0;background:rgba(12,34,42,.55);z-index:100;display:none;align-items:center;justify-content:center;padding:20px}
.overlay.show{display:flex}
.overlay-card{background:#fff;max-width:640px;width:100%;border-radius:12px;overflow:hidden;box-shadow:var(--shadow-hover)}
.overlay-card img{width:100%;height:210px;object-fit:cover}
.overlay-body{padding:22px}
.overlay-body h3{font-size:22px;margin-bottom:8px}
.overlay-body p{color:var(--muted)}
.overlay-close{margin-top:16px}

@media (max-width:1440px){
  .hero h1,.slide-title{font-size:40px}
}
@media (max-width:1024px){
  :root{--space:80px;--gutter:24px}
  .nav-list{display:none}
  .nav-cta{display:none}
  .menu-toggle{display:flex}
  .split,.product-stage,.dark-grid,.cta-panel,.footer-grid{grid-template-columns:1fr}
  .product-card{grid-template-columns:1fr}
  .product-card img{height:220px}
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento-card.wide{grid-column:span 2;grid-row:span 1}
  .adv-grid{grid-template-columns:1fr 1fr}
  .adv-card.grow{grid-row:auto}
  .case-wall,.news-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:1fr 1fr;gap:18px}
  .timeline::before{display:none}
  .stat-bar{grid-template-columns:1fr 1fr}
  .stat{border-right:0;border-bottom:1px solid #D7E6F2}
  .hero-track{min-height:580px}
  .story,.story.reverse{grid-template-columns:1fr}
  .story.reverse .story-media{order:0}
  .logo-wall{grid-template-columns:repeat(4,1fr)}
  .assure-bar,.scene-row{grid-template-columns:1fr}
}
@media (max-width:768px){
  :root{--space:56px;--gutter:16px;--nav:60px}
  .topbar-left span:nth-child(2),.topbar-left span:nth-child(3){display:none}
  .hero-content{padding:48px 0 118px}
  .hero h1,.slide-title{font-size:30px}
  .hero-lead{font-size:15px}
  .section-head h2,.dark-band h2,.form-box h2{font-size:24px}
  .metric-bar .container{grid-template-columns:1fr;padding:8px 0}
  .metric-item{border-right:0;border-bottom:1px solid var(--line);padding:10px 4px}
  .bento,.adv-grid,.window-row,.logo-wall{grid-template-columns:1fr 1fr}
  .split-media img,.story img{height:240px}
  .form-grid{grid-template-columns:1fr}
  .hero-ctrl{display:none}
  .hero-pause{right:12px;bottom:auto;top:12px}
  .hero-dots{bottom:118px}
  .copyright{flex-direction:column}
}
@media (max-width:520px){
  .bento,.adv-grid,.case-wall,.news-grid,.review-grid,.logo-wall,.window-row,.stat-bar,.timeline,.product-side{grid-template-columns:1fr}
  .bento-card.wide{grid-column:auto}
  .hero-track{min-height:auto}
  .hero h1,.slide-title{font-size:28px}
  .brand-key{font-size:14px}
  .stat .num{font-size:30px}
  .topbar-btn{display:none}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none !important}
}

/* roulang page: index */
:root{--blue:#2F6FA8;--blue-deep:#245A8A;--green:#1C9B6E;--green-deep:#157A57;--ink:#12343C;--amber:#C9842A;--bg:#F4F7FB;--line:#E6EEF5;--text:#1A2B36;--muted:#5B6E7C;--weak:#7A8B98;--shadow:0 8px 24px rgba(20,40,70,.06);--shadow-hover:0 12px 28px rgba(20,40,70,.1);--space:96px;--w:1220px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html,body{max-width:100%;overflow-x:hidden}
body{font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.75}
img{max-width:100%;display:block;height:auto}
a{color:var(--blue);text-decoration:none;transition:.2s}
button,input,select,textarea{font:inherit}
button{cursor:pointer;border:0;background:none}
ul{list-style:none}
.container{width:min(var(--w),calc(100% - 48px));margin:0 auto}
.skip{position:absolute;left:-999px;top:8px;background:#fff;padding:8px 12px;z-index:80}
.skip:focus{left:8px}
.num{font-variant-numeric:tabular-nums;font-weight:600}
.topbar{height:40px;background:#EAF2F8;color:#335467;font-size:13px;display:flex;align-items:center}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-left{display:flex;gap:22px;flex-wrap:wrap}
.topbar a{color:#335467}
.topbar a:hover,.topbar a:focus{color:var(--blue)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:8px;font-weight:500;transition:.2s;border:1px solid transparent}
.btn-sm{min-height:32px;height:32px;padding:0 12px;font-size:13px;border-radius:6px}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover,.btn-primary:focus{background:var(--blue-deep);transform:translateY(-1px)}
.btn-primary:active{transform:none;background:#1E4E78}
.btn-ghost{background:#fff;color:var(--blue);border-color:var(--blue)}
.btn-ghost:hover,.btn-ghost:focus{background:#EEF5FB;transform:translateY(-1px)}
.btn-line{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-line:hover,.btn-line:focus{background:rgba(255,255,255,.08)}
.nav-wrap{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:600;font-size:18px}
.logo-mark{width:28px;height:28px;border-radius:6px;background:linear-gradient(135deg,var(--blue),var(--green));position:relative}
.logo-mark:after{content:"";position:absolute;inset:7px 6px;border:1.5px solid #fff;border-radius:3px}
.logo em{font-style:normal;color:var(--blue)}
.logo-split{width:1px;height:16px;background:#C5D5E2}
.menu{display:flex;gap:4px}
.menu a{padding:10px 12px;color:var(--text);font-size:15px;border-radius:6px;min-height:44px;display:inline-flex;align-items:center}
.menu a:hover,.menu a:focus{color:var(--blue);background:#F3F8FC}
.nav-cta{display:flex;gap:8px;align-items:center}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:8px;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.burger span{display:block;width:18px;height:2px;background:var(--ink)}
.drawer{display:none;position:fixed;inset:0;background:rgba(18,52,60,.42);z-index:50}
.drawer.open{display:block}
.drawer-panel{position:absolute;right:0;top:0;height:100%;width:min(360px,88vw);background:#fff;padding:20px;overflow:auto}
.drawer-top{background:#EAF2F8;padding:12px;border-radius:8px;font-size:13px;color:#335467;margin-bottom:16px}
.drawer-top p{margin:4px 0}
.drawer a{display:flex;align-items:center;min-height:44px;padding:8px 10px;border-bottom:1px solid var(--line);color:var(--text)}
.hero{position:relative;min-height:640px;color:#fff}
.slides{position:relative;min-height:640px}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .6s;background-size:cover;background-position:center}
.slide.active{opacity:1;z-index:1}
.slide:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,40,52,.62),rgba(18,40,52,.28) 55%,rgba(18,40,52,.18))}
.slide-inner{position:relative;z-index:2;width:min(var(--w),calc(100% - 48px));margin:0 auto;padding:92px 0 128px;max-width:760px}
.kicker{display:inline-flex;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:4px 12px;font-size:13px;margin-bottom:16px}
.hero h1,.hero .ht{font-size:42px;line-height:1.25;font-weight:600;margin-bottom:16px}
.hero .lead{font-size:16px;line-height:1.8;max-width:680px;margin-bottom:18px;color:rgba(255,255,255,.92)}
.sell{margin:0 0 22px;display:grid;gap:8px}
.sell li{position:relative;padding-left:18px;font-size:15px}
.sell li:before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:50%;background:#7ED0B0}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-nav{position:absolute;z-index:3;top:46%;width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.28);display:flex;align-items:center;justify-content:center}
.hero-nav:hover,.hero-nav:focus{background:rgba(255,255,255,.28)}
.hero-prev{left:16px}.hero-next{right:16px}
.dots{position:absolute;z-index:3;left:50%;bottom:86px;transform:translateX(-50%);display:flex;gap:8px}
.dots button{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.4)}
.dots button.active,.dots button:focus{background:#fff;width:22px;border-radius:999px}
.pause-btn{position:absolute;z-index:3;right:24px;bottom:86px;min-width:44px;min-height:32px;border-radius:8px;background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.28);font-size:12px;display:inline-flex;align-items:center;justify-content:center}
.meter{position:absolute;z-index:3;left:0;right:0;bottom:0;background:rgba(255,255,255,.92);color:var(--text)}
.meter-grid{display:grid;grid-template-columns:repeat(3,1fr);min-height:72px}
.meter-item{padding:14px 8px;display:flex;flex-direction:column;justify-content:center;border-right:1px solid var(--line)}
.meter-item:last-child{border:0}
.meter-item strong{font-size:18px;color:var(--blue)}
.meter-item span{font-size:13px;color:var(--muted)}
main section{padding:var(--space) 0}
.sec-h{margin-bottom:28px;max-width:760px}
.sec-h h2{font-size:28px;line-height:1.35;font-weight:600;margin-bottom:10px}
.sec-h p{color:var(--muted)}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:#E7F6EF;color:var(--green-deep);font-size:12px;font-weight:500}
.badge-blue{background:#E7F1F8;color:var(--blue-deep)}
.split{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center}
.split img{width:100%;height:420px;object-fit:cover;border-radius:12px;box-shadow:var(--shadow);border:1px solid var(--line)}
.facts{margin-top:18px;padding:16px 18px;background:#fff;border:1px dashed #C9D8E6;border-radius:10px}
.facts strong{color:var(--green-deep)}
.link{font-weight:500;display:inline-flex;margin-top:14px}
.link:hover,.link:focus{color:var(--blue-deep)}
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.bento-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px;box-shadow:var(--shadow);min-height:180px;transition:.2s}
.bento-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.bento-card.wide{grid-column:span 4}.bento-card.mid{grid-column:span 2}.bento-card.std{grid-column:span 3}
.bento-card h3{font-size:18px;margin:8px 0;font-weight:600}
.bento-card p{color:var(--muted);font-size:15px}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.adv-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:var(--shadow);transition:.2s}
.adv-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.adv-card.big{padding:28px 24px;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cpath d='M10 80 Q80 10 150 80' fill='none' stroke='%231C9B6E' stroke-width='1.2' opacity='.25'/%3E%3C/svg%3E") right 12px bottom 8px no-repeat}
.ico{width:36px;height:36px;border-radius:8px;border:1px solid #D5E6F2;display:flex;align-items:center;justify-content:center;color:var(--blue);margin-bottom:12px;font-size:13px;font-weight:600}
.adv-card h3{font-size:18px;margin-bottom:8px}
.adv-card p{color:var(--muted);font-size:15px}
.prod{display:grid;grid-template-columns:1.4fr 1fr;gap:16px}
.prod-side{display:grid;gap:16px}
.prod-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);display:grid;grid-template-columns:1.1fr 1fr}
.prod-card.small{grid-template-columns:120px 1fr}
.prod-card img{width:100%;height:100%;object-fit:cover;min-height:180px}
.prod-body{padding:22px}
.prod-body h3{font-size:20px;margin:8px 0}
.prod-body p{color:var(--muted);font-size:15px}
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;position:relative}
.steps:before{content:"";position:absolute;left:8px;right:8px;top:23px;height:1px;background:#C9D8E6}
.step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 14px 16px;position:relative;box-shadow:var(--shadow)}
.step i{width:28px;height:28px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-style:normal;font-size:13px;font-weight:600;margin-bottom:10px}
.step h3{font-size:16px;margin-bottom:6px}
.step p{font-size:14px;color:var(--muted);line-height:1.65}
.dark{background:var(--ink);color:#E7F0F2;padding:88px 0}
.dark h2{color:#fff;font-size:28px;margin-bottom:22px;max-width:820px}
.dark-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.quote{border-left:3px solid var(--green);padding:8px 0 8px 18px}
.quote h3{color:#fff;font-size:18px;margin-bottom:8px}
.quote p{color:#C5D5DA}
.wall{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.tile{position:relative;border-radius:12px;overflow:hidden;min-height:210px;cursor:pointer;border:1px solid var(--line);padding:0;text-align:left;width:100%;color:#fff}
.tile img{width:100%;height:210px;object-fit:cover}
.tile-mask{position:absolute;inset:0;background:linear-gradient(180deg,transparent 35%,rgba(18,52,60,.82));display:flex;flex-direction:column;justify-content:flex-end;padding:14px}
.tile h3{font-size:16px}
.tile p{font-size:13px;opacity:0;max-height:0;transition:.2s}
.tile:hover p,.tile:focus p{opacity:1;max-height:80px;margin-top:6px}
.overlay{position:fixed;inset:0;background:rgba(18,52,60,.55);z-index:60;display:none;align-items:center;justify-content:center;padding:24px}
.overlay.open{display:flex}
.overlay-card{background:#fff;max-width:640px;width:100%;border-radius:12px;padding:28px;position:relative;color:var(--text)}
.overlay-card h3{margin-bottom:8px}
.overlay-close{position:absolute;right:12px;top:12px;width:44px;height:44px;font-size:22px}
.story{display:grid;grid-template-columns:1fr 1.1fr;align-items:center;margin-bottom:36px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.story:nth-child(even){grid-template-columns:1.1fr 1fr}
.story:nth-child(even) img{order:2}
.story img{width:100%;height:280px;object-fit:cover}
.story div{padding:28px}
.story h3{font-size:20px;margin:8px 0 10px}
.stats{background:#EAF3F8;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{background:#fff;border-radius:12px;padding:22px;border:1px solid var(--line)}
.stat b{display:block;font-size:32px;color:var(--blue);line-height:1.2;margin-bottom:6px}
.stat i{font-style:normal;font-weight:600}
.stat span{color:var(--muted);font-size:14px}
.rev-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.rev{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;box-shadow:var(--shadow)}
.stars{color:var(--amber);letter-spacing:2px;font-size:13px;margin-bottom:8px}
.rev p{font-size:15px;min-height:96px}
.who{display:flex;gap:10px;align-items:center;margin-top:14px}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600}
.who small{display:block;color:var(--muted);font-size:12px}
.partners{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.partner{height:72px;background:#F2F5F8;border:1px solid var(--line);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#607382;font-size:14px;font-weight:500}
.scenes{display:grid;gap:12px}
.scene{display:grid;grid-template-columns:220px 1fr auto;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.scene img{width:220px;height:120px;object-fit:cover}
.scene h3{font-size:18px}
.scene p{color:var(--muted);font-size:15px}
.news-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:16px}
.news{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.news img{width:100%;height:180px;object-fit:cover}
.news div{padding:16px 18px 18px}
.news time{font-size:12px;color:var(--weak)}
.news h3{font-size:17px;margin:6px 0;font-weight:600}
.news p{color:var(--muted);font-size:14px}
.more{margin-top:18px}
.faq-list{display:grid;gap:10px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.faq-item button{width:100%;text-align:left;padding:16px 18px;min-height:56px;display:flex;justify-content:space-between;gap:12px;font-weight:500}
.faq-item button:hover,.faq-item button:focus{color:var(--blue)}
.faq-item .a{display:none;padding:0 18px 16px;background:#F7FAFC;color:var(--muted)}
.faq-item.open .a{display:block}
.faq-item i{font-style:normal;color:var(--blue)}
.guard{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:28px}
.guard-item{background:#fff;border:1px solid #D7E6F2;border-radius:10px;padding:16px;display:flex;gap:10px;align-items:flex-start}
.guard-item b{display:block;font-size:15px}
.guard-item span{font-size:13px;color:var(--muted)}
.cta-box{display:grid;grid-template-columns:1.3fr .9fr;gap:24px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:28px;box-shadow:var(--shadow)}
.form{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form .full{grid-column:1/-1}
label{font-size:13px;color:var(--muted);display:block;margin-bottom:4px}
input,select,textarea{width:100%;border:1px solid #D3E0EA;border-radius:8px;padding:10px 12px;background:#fff;min-height:44px}
textarea{min-height:96px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,111,168,.15)}
.err{border-color:#C45B4A !important}
.ok{display:none;background:#E8F7F0;border:1px solid #B9E4D0;color:var(--green-deep);padding:16px;border-radius:10px}
.contact-side{background:#F4F8FB;border-radius:10px;padding:18px}
.contact-side h3{margin-bottom:10px;font-size:18px}
.contact-side p{margin:8px 0;color:var(--muted);font-size:15px}
footer{background:#0F2C33;color:#C5D4DA;padding:56px 0 24px}
.ft-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:28px;margin-bottom:28px}
.ft-brand strong{color:#fff;font-size:18px;display:block;margin-bottom:8px}
footer a{color:#C5D4DA}
footer a:hover,footer a:focus{color:#fff}
.ft-copy{border-top:1px solid rgba(255,255,255,.08);padding-top:16px;font-size:13px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
footer h3{color:#fff;font-size:15px;margin-bottom:10px;font-weight:600}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px}
@media (max-width:1440px){.hero h1,.hero .ht{font-size:40px}}
@media (max-width:1024px){
:root{--space:72px}
.container,.slide-inner{width:calc(100% - 40px)}
.menu{display:none}.burger{display:flex}.nav-cta .btn{display:none}
.split,.prod,.dark-grid,.cta-box{grid-template-columns:1fr}
.prod-card,.prod-card.small,.story,.story:nth-child(even){grid-template-columns:1fr}
.story:nth-child(even) img{order:0}
.adv-grid{grid-template-columns:1fr 1fr}
.bento{grid-template-columns:1fr 1fr}
.bento-card.wide,.bento-card.mid,.bento-card.std{grid-column:span 1}
.steps{grid-template-columns:1fr 1fr 1fr}.steps:before{display:none}
.wall,.rev-grid{grid-template-columns:1fr 1fr}
.partners{grid-template-columns:1fr 1fr 1fr}
.news-grid{grid-template-columns:1fr 1fr}
.scene{grid-template-columns:160px 1fr}.scene .btn{display:none}
.guard,.ft-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
:root{--space:56px}.topbar{display:none}
.hero,.slides{min-height:560px}
.hero h1,.hero .ht{font-size:30px}
.slide-inner{padding:72px 0 118px}
.meter-grid,.stat-grid{grid-template-columns:1fr 1fr}
.adv-grid,.bento,.steps,.wall,.rev-grid,.partners,.news-grid,.guard,.form{grid-template-columns:1fr}
.split img,.story img{height:220px}
.prod-card img{min-height:160px;height:180px}
.sec-h h2,.dark h2{font-size:24px}
}
@media (max-width:520px){
.container,.slide-inner{width:calc(100% - 32px)}
.hero h1,.hero .ht{font-size:28px}
.hero-actions{flex-direction:column;align-items:stretch}
.meter-grid,.stat-grid,.ft-grid,.cta-box{grid-template-columns:1fr}
.scene{grid-template-columns:1fr}.scene img{width:100%;height:140px}
.btn{width:100%}.hero-nav,.pause-btn{display:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}