/* roulang page: index */
:root{
 --ink:#1d2421;--deep:#151b18;--mint:#a8e6c1;--mint-dark:#39765c;--mist:#f5f7f3;
 --paper:#fff;--muted:#68736e;--line:#dce4dd;--coral:#e78368;--shadow:0 18px 45px rgba(28,43,35,.08);
 --radius:18px;--max:1220px;--focus:#f4a36f;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;color:var(--ink);background:var(--mist);font-size:16px;line-height:1.75}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}
.topbar{background:var(--deep);color:#dfe9e2;font-size:13px}
.topbar-inner{height:38px;display:flex;justify-content:space-between;align-items:center}
.topbar .right{display:flex;gap:24px;align-items:center}
.topbar a:hover{color:var(--mint)}
.navbar{height:76px;background:rgba(250,252,249,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;transition:.25s}
.navbar.scrolled{box-shadow:0 5px 20px rgba(20,30,25,.08);background:#fff}
.nav-inner{height:100%;display:flex;align-items:center;gap:45px}
.logo{font-weight:800;font-size:20px;letter-spacing:-.06em;white-space:nowrap}
.logo span{display:block;color:var(--mint-dark);font-size:11px;letter-spacing:.08em;font-weight:600}
.nav-links{display:flex;gap:25px;flex:1}
.nav-links a{font-size:14px;color:#56635c;padding:8px 0;border-bottom:2px solid transparent}
.nav-links a:hover,.nav-links a.active{color:var(--ink);border-color:var(--mint-dark)}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;width:44px;height:44px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:12px;padding:12px 20px;min-height:46px;font-weight:700;transition:.22s}
.btn:hover{transform:translateY(-3px)}
.btn:active{transform:translateY(0) scale(.98)}
.btn-primary{background:var(--mint);color:var(--ink)}
.btn-primary:hover{background:#8ed9af}
.btn-dark{background:var(--deep);color:#fff}
.btn-outline{border-color:#aab8af;background:transparent;color:var(--ink)}
.btn-outline:hover{border-color:var(--mint-dark);background:#edf8f0}
.section{padding:104px 0;scroll-margin-top:82px}
.section-head{max-width:720px;margin-bottom:42px}
.eyebrow{color:var(--mint-dark);font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;margin-bottom:12px}
h1,h2,h3{line-height:1.2;letter-spacing:-.045em}
h1{font-size:clamp(42px,5.5vw,76px);max-width:700px}
h2{font-size:clamp(30px,3.5vw,48px)}
h3{font-size:20px}
.lead{font-size:18px;color:var(--muted);line-height:1.85;margin:24px 0}
.hero{min-height:650px;padding:95px 0 80px;position:relative;overflow:hidden;background:linear-gradient(115deg,rgba(245,247,243,.98) 36%,rgba(245,247,243,.72)),url('/assets/images/7d780805c3317f26.webp') center/cover}
.hero-grid{display:grid;grid-template-columns:1.03fr .97fr;gap:70px;align-items:center}
.hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:30px}
.hero-note{display:flex;gap:22px;margin-top:38px;color:var(--muted);font-size:13px}
.hero-note strong{display:block;color:var(--ink);font-size:22px;font-family:monospace}
.sound-board{background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:24px;padding:25px;box-shadow:var(--shadow);position:relative}
.board-top{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:16px;color:var(--muted);font-size:13px}
.status{color:var(--mint-dark);font-weight:700}
.wave{height:125px;display:flex;align-items:center;justify-content:center;gap:4px;border-bottom:1px solid var(--line);background:repeating-linear-gradient(90deg,transparent 0 38px,rgba(61,117,89,.08) 39px 40px)}
.wave i{width:4px;border-radius:4px;background:var(--mint-dark);height:var(--h);animation:pulse 1.8s ease-in-out infinite alternate}
.wave i:nth-child(3n){background:var(--coral)}
@keyframes pulse{to{transform:scaleY(.6);opacity:.55}}
.board-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}
.field-chip{border:1px solid var(--line);padding:12px;border-radius:10px;font-size:13px}.field-chip b{display:block;font-size:15px}
.mint-bg{background:#eaf5ed}.dark{background:var(--deep);color:#eef5ef}.dark .section-head p,.dark .muted{color:#aebbb2}
.product{background:var(--paper)}
.product-grid{display:grid;grid-template-columns:1fr 1fr;gap:78px;align-items:center}
.product-visual{position:relative}.product-visual img{width:100%;height:425px;object-fit:cover;border-radius:22px}
.console{position:absolute;right:-25px;bottom:-28px;background:var(--deep);color:#fff;padding:20px;border-radius:15px;width:230px;box-shadow:var(--shadow)}
.console-line{height:5px;background:linear-gradient(90deg,var(--mint) 70%,#34463c 70%);margin:13px 0;border-radius:4px}
.badges{display:flex;flex-wrap:wrap;gap:9px;margin:25px 0}.badge,.tag{border:1px solid var(--line);border-radius:30px;padding:6px 12px;font-size:13px;background:#fff}.badge b{color:var(--mint-dark);margin-right:4px}
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;transition:.22s}.card:hover{transform:translateY(-4px);border-color:#8ccca5;box-shadow:var(--shadow)}.icon{width:42px;height:42px;border-radius:12px;background:#e5f4e9;color:var(--mint-dark);display:grid;place-items:center;font-weight:800;margin-bottom:23px}.card p{color:var(--muted);font-size:14px;margin:12px 0 20px}.tag{padding:4px 9px;color:var(--muted);background:var(--mist)}
.tools{background:#eef2ed}.tools-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:16px}.tool-card{display:grid;grid-template-columns:190px 1fr;gap:24px;align-items:center}.tool-card:first-child{grid-row:span 2}.tool-card:first-child img{height:330px}.tool-card img{width:100%;height:150px;object-fit:cover;border-radius:13px}.tool-wave{height:42px;margin:14px 0;background:repeating-linear-gradient(90deg,#b7ddc2 0 3px,transparent 3px 9px);opacity:.8}
.data-strip{padding:50px 0;background:#e2e9e3;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:25px}.metric{border-left:3px solid var(--mint-dark);padding-left:18px}.metric strong{font:700 38px/1 monospace;display:block}.metric span{font-size:13px;color:var(--muted)}
.workflow{background:#fff}.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}.steps:before{content:"";position:absolute;top:23px;left:4%;right:4%;height:2px;background:#c9dfcf}.step{position:relative;text-align:center;padding:0 14px}.num{width:48px;height:48px;border-radius:50%;background:var(--deep);color:var(--mint);display:grid;place-items:center;margin:0 auto 22px;font-weight:800;position:relative;z-index:1}.step p{font-size:14px;color:var(--muted);margin-top:10px}
.case-wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:stretch}.case-main{min-height:390px;border-radius:22px;padding:36px;display:flex;flex-direction:column;justify-content:flex-end;background:linear-gradient(0deg,rgba(10,15,12,.92),transparent),url('/assets/images/e37708b0fcb23c9d.webp') center/cover}.case-main h3{font-size:30px}.case-list{display:flex;flex-direction:column;gap:10px}.case-item{padding:22px;border:1px solid #3b4b42;border-radius:14px;color:#b9c8be}.case-item:hover{border-color:var(--mint);color:#fff}.case-item b{display:block;color:var(--mint);margin-bottom:5px}
.stories{background:#f1f4f0}.story{display:grid;grid-template-columns:90px 1fr 220px;gap:28px;padding:28px 0;border-top:1px solid var(--line);align-items:center}.story-num{font:700 36px monospace;color:var(--mint-dark)}.story p{color:var(--muted);font-size:14px}.mini-wave{height:35px;background:repeating-linear-gradient(90deg,var(--mint-dark) 0 2px,transparent 2px 8px);opacity:.7}
.reviews{background:#fff}.review-track{display:flex;gap:16px;overflow-x:auto;padding-bottom:12px;scroll-snap-type:x mandatory}.review-card{min-width:31%;scroll-snap-align:start}.stars{color:#d4775d;letter-spacing:3px;margin-bottom:18px}.review-card p{color:#4e5b53;font-size:15px;min-height:72px}
.insights{background:#eef2ed}.insight-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr;gap:16px}.insight{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.insight img{height:190px;width:100%;object-fit:cover}.insight:first-child img{height:260px}.insight-body{padding:22px}.insight-body small{color:var(--coral);font-weight:700}.insight-body p{color:var(--muted);font-size:14px;margin-top:10px}
.partners{background:#fff}.tag-wall{display:flex;flex-wrap:wrap;gap:12px;max-width:900px}.tag-wall span{padding:16px 20px;border:1px solid var(--line);border-radius:13px;background:var(--mist);font-weight:700}.tag-wall span small{display:block;color:var(--muted);font-weight:400;font-size:12px}
.faq{background:#eef2ed}.faq-list{max-width:900px}.faq-item{border-top:1px solid #cbd7ce}.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;text-align:left;background:transparent;border:0;padding:22px 5px;font-weight:700;color:var(--ink)}.faq-q span:last-child{font-size:24px;color:var(--mint-dark);transition:.2s}.faq-a{max-height:0;overflow:hidden;color:var(--muted);padding:0 5px;transition:max-height .3s,padding .3s}.faq-item.open .faq-a{max-height:180px;padding:0 5px 22px}.faq-item.open .faq-q span:last-child{transform:rotate(45deg)}
.assurance{padding:38px 0;background:#dcebe0;border-bottom:1px solid #c9d9cc}.assure-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.assure{display:flex;gap:12px;align-items:flex-start}.assure b{display:block}.assure p{font-size:13px;color:var(--muted);margin-top:3px}
.contact{background:var(--deep);color:#fff}.contact-grid{display:grid;grid-template-columns:1fr .9fr;gap:80px;align-items:start}.contact .section-head p{color:#b5c2b9}.contact-info{margin-top:28px;color:#c2cec5}.contact-info strong{color:var(--mint);font-size:22px}.form{background:#202a25;padding:28px;border-radius:18px;border:1px solid #3d4d42}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form label{display:block;font-size:13px;color:#bdc9c0}.form input,.form select,.form textarea{width:100%;background:#18201c;color:#fff;border:1px solid #4a5a50;border-radius:9px;padding:12px;margin-top:6px}.form textarea{resize:vertical;min-height:105px}.full{grid-column:1/-1}.form .btn{width:100%;margin-top:16px}.form-note{font-size:12px;color:#9eaca2;margin-top:12px}.form-message{font-size:13px;color:var(--mint);margin-top:10px;display:none}
footer{background:#101512;color:#aeb9b0;padding:50px 0 22px;font-size:14px}.foot-top{display:flex;justify-content:space-between;gap:30px;margin-bottom:40px}.foot-links{display:grid;grid-template-columns:repeat(3,1fr);gap:60px}.foot-links b{color:#fff;display:block;margin-bottom:14px}.foot-links a{display:block;margin:8px 0;color:#aeb9b0}.foot-links a:hover{color:var(--mint)}.copyright{border-top:1px solid #2b3730;padding-top:20px;margin-top:35px;font-size:12px;display:flex;justify-content:space-between;gap:15px}
@media(max-width:1024px){.nav-inner{gap:22px}.nav-links{gap:14px}.hero-grid,.product-grid,.case-wrap,.contact-grid{gap:35px}.section{padding:82px 0}}
@media(max-width:768px){.container{width:min(100% - 32px,620px)}.topbar .left,.topbar .right span:not(.consult){display:none}.topbar-inner{justify-content:flex-end}.navbar{height:68px}.nav-toggle{display:block;margin-left:auto}.nav-links{position:fixed;inset:68px 0 0;background:#f8faf7;display:none;flex-direction:column;padding:30px 24px;gap:4px;z-index:30}.nav-links.open{display:flex}.nav-links a{padding:15px 0;font-size:17px}.nav-cta{display:none}.hero{padding:68px 0}.hero-grid,.product-grid,.case-wrap,.contact-grid{grid-template-columns:1fr}.hero-grid{gap:38px}h1{font-size:46px}.matrix{grid-template-columns:repeat(2,1fr)}.tools-grid,.insight-grid{grid-template-columns:1fr}.tool-card:first-child{grid-row:auto}.tool-card:first-child img,.tool-card img{height:220px}.data-grid,.assure-grid{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:1fr;gap:25px;text-align:left}.steps:before{left:23px;top:24px;bottom:24px;width:2px;height:auto;right:auto}.step{display:grid;grid-template-columns:48px 1fr;text-align:left;gap:18px;padding:0}.step .num{margin:0}.step p{grid-column:2}.story{grid-template-columns:58px 1fr}.story .mini-wave{grid-column:2}.review-card{min-width:76%}.foot-top{display:block}.foot-links{gap:20px;margin-top:30px}}
@media(max-width:480px){body{font-size:15px}.container{width:calc(100% - 28px)}.topbar{font-size:12px}.hero{padding:55px 0}.hero-actions .btn{width:100%}h1{font-size:39px}.lead{font-size:16px}.hero-note{gap:14px}.sound-board{padding:16px}.matrix{grid-template-columns:1fr}.card{padding:21px}.product-visual img{height:290px}.console{right:8px;bottom:-22px;width:190px}.badges{margin-top:40px}.data-grid,.assure-grid{grid-template-columns:1fr 1fr;gap:18px}.metric strong{font-size:29px}.section{padding:68px 0}.form-grid{grid-template-columns:1fr}.full{grid-column:auto}.foot-links{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:8px}}
@media(max-width:375px){h1{font-size:35px}.hero-note strong{font-size:18px}.tool-card{grid-template-columns:1fr}.tool-card img{height:180px}.data-grid{grid-template-columns:1fr}.review-card{min-width:88%}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}