/* roulang page: index */
:root{--bg:#F6F7F9;--white:#FFFFFF;--ink:#1A1D24;--muted:#4B5262;--faint:#7E8799;--line:#E3E6EC;--dark:#13161C;--teal:#00838F;--teal-deep:#00695C;--amber:#E65100;--amber-soft:#FFF3E8;--teal-soft:#E6F4F5;--radius:12px;--radius-sm:8px;--shadow:0 10px 30px rgba(19,22,28,.06);--container:1280px;--nav:76px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea{font-family:inherit}
button{cursor:pointer}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
.topbar{background:#0E1116;color:#D5DAE3;font-size:13px;line-height:1.4}
.topbar-inner{min-height:38px;display:flex;justify-content:space-between;align-items:center;gap:16px}
.topbar b{color:#fff;font-weight:600}
.top-links{display:flex;gap:14px;color:#B7C4C6;white-space:nowrap}
.header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid var(--line)}
.nav{height:var(--nav);display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;font-size:20px;color:var(--ink)}
.logo-mark{width:36px;height:36px;border-radius:8px;background:linear-gradient(145deg,var(--teal),var(--teal-deep));display:grid;place-items:center;flex:none}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:8px 12px;border-radius:8px;color:var(--muted);font-size:15px;font-weight:600}
.nav-links a:hover,.nav-links a:focus-visible,.nav-links a.active{color:var(--teal-deep);background:var(--teal-soft)}
.nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:8px;border:1px solid transparent;font-weight:700;letter-spacing:-.01em;transition:.2s ease}
.nav-cta,.btn-primary{background:var(--amber);color:#fff}
.nav-cta:hover,.btn-primary:hover{background:#BF360C}
.btn-primary:active,.nav-cta:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:#fff;color:var(--dark)}
.btn-line{background:#fff;color:var(--teal-deep);border-color:#B7D6D4}
.btn-line:hover{border-color:var(--teal);background:var(--teal-soft)}
.btn:focus-visible,.nav-cta:focus-visible,.menu-btn:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--teal);outline-offset:2px}
.menu-btn{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:8px;background:#fff}
.menu-btn span{display:block;width:18px;height:2px;background:var(--ink);margin:4px auto}
.hero{position:relative;min-height:760px;color:#fff;background:#13161C url("/assets/images/2d79eac5c99717dd.webp") center/cover no-repeat;display:flex;align-items:flex-end}
.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(19,22,28,.92) 0%,rgba(19,22,28,.78) 46%,rgba(19,22,28,.42) 100%)}
.hero-inner{position:relative;z-index:1;padding:72px 0 36px;width:100%}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:end}
.kicker{display:inline-flex;align-items:center;gap:8px;background:rgba(0,131,143,.2);border:1px solid rgba(128,222,234,.45);color:#B2EBF2;border-radius:999px;padding:4px 10px;font-size:13px;font-weight:700}
.hero h1{margin:16px 0 12px;font-size:48px;line-height:1.22;letter-spacing:-.02em;font-weight:800;max-width:16em}
.hero-lead{max-width:680px;color:#E6E8EE;font-size:16.5px;margin:0 0 22px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.burst{position:relative;justify-self:end;width:210px;height:210px;margin-bottom:18px}
.burst-core{width:210px;height:210px;background:var(--amber);color:#fff;clip-path:polygon(50% 0%,61% 12%,75% 4%,79% 20%,96% 18%,90% 34%,100% 46%,86% 54%,92% 70%,76% 68%,70% 86%,56% 76%,50% 96%,44% 76%,30% 86%,24% 68%,8% 70%,14% 54%,0 46%,10% 34%,4% 18%,21% 20%,25% 4%,39% 12%);display:grid;place-items:center;text-align:center;transform:rotate(-8deg);box-shadow:0 12px 30px rgba(230,81,0,.28)}
.burst strong{display:block;font-size:22px;line-height:1.2;letter-spacing:-.02em}
.burst span{display:block;font-size:13px;line-height:1.35;margin-top:4px}
.limit-note{margin-top:14px;color:#FFCCBC;font-size:14px}
.film{margin-top:34px;display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.film figure{margin:0;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:12px;overflow:hidden}
.film img{height:120px;width:100%;object-fit:cover}
.film figcaption{padding:8px 12px 10px;font-size:13px;color:#E8EEF2}
.dots{display:flex;gap:8px;margin-top:16px}
.dots button{width:28px;height:6px;border:0;border-radius:99px;background:rgba(255,255,255,.35);padding:0}
.dots button.on{background:#fff;width:42px}
section{padding:84px 0}
.sec-head{max-width:760px;margin-bottom:28px}
.sec-head h2,.block-title{margin:0 0 10px;font-size:32px;line-height:1.25;letter-spacing:-.02em;font-weight:800}
.sec-head p,.lead{margin:0;color:var(--muted)}
.eyebrow{color:var(--teal);font-weight:800;font-size:13px;letter-spacing:.08em;margin-bottom:8px}
.alt{background:#fff}
.tint{background:linear-gradient(180deg,#fff,#F3F6F8)}
.stat-bar{display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}
.stat-item{padding:22px 18px;border-right:1px solid var(--line)}
.stat-item:last-child{border-right:0}
.stat-item em{display:block;font-style:normal;color:var(--teal-deep);font-weight:800;font-size:18px;letter-spacing:-.02em;line-height:1.3}
.stat-item span{display:block;color:var(--muted);font-size:13px;margin-top:6px}
.scene-layout{display:grid;grid-template-columns:280px 1fr;gap:28px;align-items:stretch}
.scene-side{background:var(--dark);color:#fff;border-radius:12px;padding:28px;display:flex;flex-direction:column;justify-content:space-between}
.scene-side ol{margin:16px 0 0;padding-left:18px}
.scene-side li{margin:8px 0}
.scene-cards{display:grid;gap:16px}
.scene-card{display:grid;grid-template-columns:210px 1fr;gap:16px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.2s ease}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.scene-card img{width:100%;height:100%;object-fit:cover;min-height:150px}
.scene-card div{padding:16px 16px 16px 0}
.scene-card h3{margin:0 0 6px;font-size:20px;letter-spacing:-.02em}
.scene-card p{margin:0;color:var(--muted);font-size:14px}
.tag{display:inline-block;background:var(--amber-soft);color:var(--amber);border-radius:99px;font-size:12px;font-weight:800;padding:2px 8px;margin-bottom:8px}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}
.split img,.arch-photo{width:100%;border-radius:12px;border:1px solid var(--line);object-fit:cover;min-height:280px}
.check{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:10px}
.check li{background:#fff;border:1px solid var(--line);border-radius:8px;padding:12px 14px 12px 42px;position:relative}
.check li:before{content:"";position:absolute;left:14px;top:18px;width:14px;height:8px;border-left:2px solid var(--teal);border-bottom:2px solid var(--teal);transform:rotate(-45deg)}
.feature-asym{display:grid;grid-template-columns:1.35fr .8fr;gap:16px}
.card{background:#fff;border:1px solid rgba(203,210,220,.9);border-radius:12px;padding:22px;box-shadow:0 1px 0 rgba(255,255,255,.7) inset}
.card:hover{border-color:#B7D0D2;box-shadow:var(--shadow)}
.card h3{margin:8px 0;font-size:22px;letter-spacing:-.02em;line-height:1.3}
.card p{margin:0;color:var(--muted)}
.stack{display:grid;gap:16px}
.ico{width:42px;height:42px;border-radius:8px;display:grid;place-items:center;background:var(--teal-soft);color:var(--teal-deep);font-weight:800}
.arch-list{margin:14px 0 0;padding:0;list-style:none}
.arch-list li{display:grid;grid-template-columns:92px 1fr;gap:10px;padding:10px 0;border-bottom:1px solid var(--line);color:var(--muted)}
.arch-list b{color:var(--ink)}
.bento{display:grid;grid-template-columns:1.3fr 1fr 1fr;grid-auto-rows:1fr;gap:16px}
.bento article{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;min-height:160px}
.bento article:first-child{background:var(--dark);color:#fff}
.bento article:first-child p{color:#C9D0DA}
.bento h3{margin:0 0 8px;font-size:20px;letter-spacing:-.02em;line-height:1.3}
.bento p{margin:0;color:var(--muted);font-size:14px}
.idx{font-variant-numeric:tabular-nums;color:var(--amber);font-weight:800;font-size:13px}
.product-board{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.product-row{display:grid;grid-template-columns:1.1fr 1.4fr .9fr;gap:12px;padding:22px 24px;border-top:1px solid var(--line);align-items:start}
.product-row:first-child{border-top:0;background:#F8FAFB}
.product-row h3{margin:0 0 6px;font-size:20px}
.product-row p,.product-row li{color:var(--muted);font-size:14px;margin:0}
.product-row ul{margin:8px 0 0;padding-left:18px}
.dark-band{background:#13161C url("/assets/images/8af796fe32ee5492.webp") center/cover no-repeat;color:#fff;position:relative}
.dark-band:before{content:"";position:absolute;inset:0;background:rgba(19,22,28,.86)}
.dark-band .container{position:relative;z-index:1}
.dark-band .lead{color:#D5DBE6}
.domain{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:26px}
.domain div{border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:18px;background:rgba(255,255,255,.04);min-height:150px}
.domain strong{display:block;margin-bottom:8px;font-size:18px}
.domain span{color:#C5CAD6;font-size:14px}
.metrics{background:linear-gradient(90deg,#00695C,#00838F);color:#fff}
.metric-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.metric-row strong{display:block;font-size:40px;letter-spacing:-.03em;line-height:1.1}
.metric-row span{display:block;margin-top:6px;color:#E0F2F1}
.case-row{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:center;margin-bottom:28px}
.case-row:last-child{margin-bottom:0}
.case-row.reverse{direction:rtl}
.case-row.reverse>*{direction:ltr}
.case-copy{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px}
.case-copy h3{margin:8px 0;font-size:24px;letter-spacing:-.02em}
.nums{display:flex;gap:18px;margin-top:14px}
.nums b{display:block;color:var(--teal-deep);font-size:28px;letter-spacing:-.03em}
.nums span{color:var(--faint);font-size:13px}
.quotes{display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:16px}
.quotes article{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}
.quotes p{margin:0 0 14px}
.who{display:flex;justify-content:space-between;gap:8px;color:var(--faint);font-size:13px;border-top:1px solid var(--line);padding-top:10px}
.score{color:var(--amber);font-weight:800}
.news-list{display:grid;gap:14px}
.news-item{display:grid;grid-template-columns:220px 1fr auto;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.news-item img{height:132px;width:100%;object-fit:cover}
.news-item h3{margin:0 0 6px;font-size:20px;letter-spacing:-.02em}
.news-item p{margin:0;color:var(--muted);font-size:14px}
.news-item time{color:var(--faint);font-size:13px}
.more{color:var(--teal-deep);font-weight:800;padding-right:18px;white-space:nowrap}
.more:hover{color:var(--amber)}
.compare{display:grid;grid-template-columns:1fr 1fr;border-radius:12px;overflow:hidden;border:1px solid var(--line)}
.compare section{padding:28px}
.compare .old{background:#fff}
.compare .new{background:#102227;color:#fff}
.compare h3{margin-top:0}
.compare li{margin:8px 0}
.compare .old li{color:var(--muted)}
.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:0 16px;margin-bottom:10px}
.faq summary{min-height:56px;display:flex;align-items:center;justify-content:space-between;font-weight:800;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";color:var(--teal);font-size:22px}
.faq details[open] summary:after{content:"–"}
.faq details p{margin:0 0 16px;color:var(--muted)}
.assure{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.assure article{background:#fff;border-radius:12px;padding:18px;border-top:3px solid var(--teal)}
.assure h3{margin:0 0 6px;font-size:18px}
.assure p{margin:0;color:var(--muted);font-size:14px}
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:start}
.contact-copy{background:var(--dark);color:#fff;border-radius:12px;padding:28px;min-height:100%}
.contact-copy p{color:#D5DBE6}
.form{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;display:grid;gap:12px}
label{font-weight:700;font-size:14px;display:grid;gap:6px}
input,textarea{width:100%;border:1px solid #D5DAE3;border-radius:8px;padding:12px 12px;font-size:15px;color:var(--ink);background:#fff}
textarea{min-height:110px;resize:vertical}
.form-note{min-height:22px;color:var(--teal-deep);font-size:14px;margin:0}
.footer{background:#13161C;color:#D5DBE6;padding:56px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.3fr .8fr .9fr 1.1fr;gap:24px}
.footer h3{color:#fff;margin:0 0 10px;font-size:16px}
.footer a{display:block;padding:4px 0;color:#C5CAD6}
.footer a:hover{color:#fff}
.legal{margin-top:28px;border-top:1px solid rgba(255,255,255,.12);padding-top:16px;color:#9AA3B2;font-size:13px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.dock{position:fixed;left:16px;right:16px;bottom:14px;z-index:50;background:#fff;border:1px solid var(--line);box-shadow:0 10px 30px rgba(19,22,28,.16);border-radius:12px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 12px 10px 16px}
.dock b{display:block;line-height:1.3}
.dock span{color:var(--muted);font-size:13px}
.dock-actions{display:flex;align-items:center;gap:8px}
.dock-close{width:44px;height:44px;border-radius:8px;border:1px solid var(--line);background:#fff;font-size:20px}
body{padding-bottom:92px}
@media(max-width:1024px){
.hero h1{font-size:38px}
.hero-grid,.split,.feature-asym,.scene-layout,.case-row,.case-row.reverse,.contact-grid,.quotes,.foot-grid{grid-template-columns:1fr;direction:ltr}
.stat-bar,.domain,.metric-row,.assure,.bento{grid-template-columns:1fr 1fr}
.product-row,.news-item{grid-template-columns:1fr}
.news-item img{height:180px}
.scene-card{grid-template-columns:160px 1fr}
.nav-links{display:none}
.menu-btn{display:inline-block}
.nav-links.open{display:flex;flex-direction:column;position:fixed;inset:114px 0 0 0;background:#fff;padding:16px;z-index:45;align-items:stretch;overflow:auto}
.nav-links.open a{min-height:44px;display:flex;align-items:center;font-size:18px}
}
@media(max-width:768px){
.container{width:min(var(--container),calc(100% - 32px))}
section{padding:64px 0}
.top-links{display:none}
.hero{min-height:0}
.hero h1{font-size:32px}
.sec-head h2{font-size:26px}
.film,.stat-bar,.domain,.metric-row,.assure,.bento,.compare{grid-template-columns:1fr}
.scene-card{grid-template-columns:1fr}
.scene-card img{height:180px}
.burst{display:none}
.dock{left:8px;right:8px;flex-wrap:wrap}
.metric-row strong{font-size:32px}
}
@media(max-width:520px){
.hero-actions,.dock-actions{width:100%}
.hero-actions .btn,.dock-actions .btn{flex:1}
.legal{flex-direction:column}
}