/* roulang page: index */
:root{
 --ink:#171719;--muted:#6d6b70;--paper:#f6f5f1;--white:#fff;
 --line:#deddd7;--accent:#c7f04a;--coral:#ff725c;--dark:#202124;
 --radius:16px;--shadow:0 18px 45px rgba(25,25,25,.09);--max:1240px;
 --ease:all .3s cubic-bezier(.2,.7,.2,1)
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none} img{display:block;width:100%;object-fit:cover}
button,input,textarea{font:inherit} button{cursor:pointer;border:0}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}
.topbar{height:42px;border-bottom:1px solid var(--line);font-size:12px;color:var(--muted);display:flex;align-items:center}
.topbar .container{display:flex;justify-content:space-between}
.topbar span:last-child{color:var(--ink)}
header{position:sticky;top:0;z-index:20;background:rgba(246,245,241,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{height:76px;display:flex;align-items:center;gap:42px}
.logo{font-weight:900;font-size:21px;letter-spacing:-1px;white-space:nowrap}
.logo i{display:inline-block;width:10px;height:10px;background:var(--coral);border-radius:50%;margin:0 8px 2px 0}
.navlinks{display:flex;gap:26px;align-items:center;margin-left:auto}
.navlinks a{font-size:14px;color:#555;transition:var(--ease);padding:8px 0}
.navlinks a:hover,.navlinks a.active{color:var(--ink);border-bottom:2px solid var(--coral)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 22px;border-radius:9px;font-weight:700;font-size:14px;transition:var(--ease);border:1px solid var(--ink)}
.btn-dark{background:var(--ink);color:#fff}.btn-dark:hover{background:var(--coral);border-color:var(--coral);transform:translateY(-2px)}
.btn-light{background:transparent}.btn-light:hover{background:var(--accent);transform:translateY(-2px)}
.menu{display:none;background:none;font-size:25px;width:46px;height:46px}
.hero{min-height:700px;position:relative;color:#fff;background:var(--dark);overflow:hidden}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .6s;background-size:cover;background-position:center}
.slide:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,15,16,.85),rgba(15,15,16,.28) 68%,rgba(15,15,16,.15))}
.slide.active{opacity:1}
.slide:nth-child(1){background-image:url('/assets/images/8a1ad20fafca7165.webp')}
.slide:nth-child(2){background-image:url('/assets/images/01e2337fa10dd30d.webp')}
.slide:nth-child(3){background-image:url('/assets/images/1cda473ee8399203.webp')}
.hero-inner{position:relative;z-index:2;min-height:700px;display:flex;align-items:center}
.hero-copy{max-width:720px;padding-bottom:32px}
.eyebrow,.kicker{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:var(--accent);font-weight:800;margin-bottom:18px}
h1{font-size:clamp(48px,7vw,92px);line-height:1.05;letter-spacing:-5px;margin-bottom:28px}
.hero-copy p{font-size:18px;line-height:1.9;max-width:650px;color:#e2e1df;margin-bottom:34px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.hero .btn-dark{background:var(--accent);color:var(--ink);border-color:var(--accent)}
.dots{position:absolute;z-index:3;bottom:42px;left:calc((100% - var(--max))/2);display:flex;gap:9px}
.dot{width:34px;height:4px;background:#777}.dot.active{background:var(--accent)}
section{padding:112px 0;border-bottom:1px solid var(--line)}
.section-head{display:flex;justify-content:space-between;gap:40px;margin-bottom:55px;align-items:end}
.section-head h2{font-size:clamp(31px,4vw,56px);line-height:1.12;letter-spacing:-2px;max-width:620px}
.section-head p{max-width:430px;color:var(--muted);font-size:15px}
.intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:80px;align-items:center}
.intro-title{font-size:clamp(34px,5vw,70px);line-height:1.1;letter-spacing:-3px}
.intro-title em{font-style:normal;color:var(--coral)}
.intro-copy p{color:var(--muted);margin:25px 0;font-size:16px}
.visual{position:relative}.visual img{height:500px;border-radius:var(--radius)}.visual-note{position:absolute;bottom:-20px;left:-30px;background:var(--accent);padding:18px 24px;border-radius:10px;font-weight:800}
.matrix{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}
.matrix .service{min-height:220px;background:var(--white);border:1px solid var(--line);padding:26px;display:flex;flex-direction:column;justify-content:space-between;transition:var(--ease)}
.service:nth-child(1){grid-column:span 5}.service:nth-child(2){grid-column:span 3;background:var(--accent)}.service:nth-child(3){grid-column:span 4}.service:nth-child(4){grid-column:span 4}.service:nth-child(5){grid-column:span 4;background:#ebe9e2}.service:nth-child(6){grid-column:span 4}
.service:hover{transform:translateY(-6px);box-shadow:var(--shadow)}.service b{font-size:22px}.service p{font-size:14px;color:var(--muted)}.service strong{font-size:28px;color:var(--coral)}
.adv-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}.adv{border-top:2px solid var(--ink);padding:22px 15px;grid-column:span 4;min-height:170px;transition:var(--ease)}.adv:first-child{grid-column:span 6;background:var(--ink);color:#fff;padding:30px}.adv:hover{border-color:var(--coral);transform:translateY(-4px)}.adv h3{font-size:20px;margin:15px 0 8px}.adv p{font-size:14px;color:var(--muted)}.adv:first-child p{color:#bbb}.num{font-size:13px;color:var(--coral);font-weight:800}.tag{display:inline-block;font-size:11px;padding:4px 9px;border:1px solid currentColor;margin-top:15px;color:var(--muted)}
.products{display:flex;gap:18px;align-items:flex-start}.product{flex:1;position:relative;overflow:hidden;background:#ddd}.product:nth-child(2){margin-top:45px}.product:nth-child(3){margin-top:90px}.product img{height:420px;transition:transform .5s}.product:hover img{transform:scale(1.05)}.product-info{position:absolute;bottom:0;left:0;right:0;padding:28px;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.8))}.product-info h3{font-size:24px}
.process{background:#ebe9e2}.timeline{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid #aaa}.step{padding:24px 18px;border-right:1px solid #aaa;min-height:180px}.step:last-child{border:0}.step b{font-size:42px;color:var(--coral);font-weight:400}.step h3{font-size:18px;margin:8px 0}.step p{font-size:13px;color:var(--muted)}
.dark{background:var(--dark);color:#fff}.dark .section-head p{color:#aaa}.gallery{display:grid;grid-template-columns:1.3fr .8fr .8fr;grid-template-rows:260px 260px;gap:12px}.gallery figure{overflow:hidden;position:relative}.gallery figure:first-child{grid-row:span 2}.gallery img{height:100%;transition:transform .5s}.gallery figure:hover img{transform:scale(1.06)}.gallery figcaption{position:absolute;bottom:15px;left:16px;background:#fff;color:var(--ink);padding:5px 10px;font-size:12px}
.story-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:60px;align-items:center}.quote{font-size:30px;line-height:1.45;letter-spacing:-1px}.person{display:flex;gap:16px;margin-top:28px;align-items:center;color:var(--muted)}.avatar{width:44px;height:44px;border-radius:50%;background:var(--coral);display:grid;place-items:center;color:#fff;font-weight:800}.story-img img{height:330px}
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:25px}.stat{border-left:2px solid var(--accent);padding-left:18px}.stat strong{display:block;font-size:38px;letter-spacing:-2px}.stat span{font-size:13px;color:#aaa}
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.review{background:#fff;border:1px solid var(--line);padding:28px;min-height:220px}.stars{color:var(--coral);letter-spacing:3px}.review p{font-size:17px;margin:20px 0}.review small{color:var(--muted)}
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.news article{border-bottom:1px solid var(--ink);padding-bottom:22px}.news img{height:180px;margin-bottom:18px}.news h3{font-size:19px}.news p{font-size:13px;color:var(--muted);margin-top:8px}.date{font-size:12px;color:var(--coral);display:block;margin-bottom:9px}
.scenes{display:flex;gap:10px;flex-wrap:wrap}.scene{border:1px solid var(--line);padding:18px 22px;background:#fff;font-weight:700}.scene:hover{background:var(--accent)}
.faq-list{max-width:900px;margin:auto}.faq{border-top:1px solid var(--line)}.faq:last-child{border-bottom:1px solid var(--line)}.faq summary{list-style:none;cursor:pointer;padding:22px 0;font-size:18px;font-weight:700;display:flex;justify-content:space-between}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"＋";color:var(--coral);font-size:24px}.faq[open] summary:after{content:"－"}.faq p{color:var(--muted);padding:0 45px 24px 0;max-width:760px;font-size:14px}
.contact{background:var(--accent);border-bottom:0}.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px}.contact h2{font-size:clamp(38px,5vw,68px);line-height:1.1;letter-spacing:-3px}.contact p{margin-top:22px;max-width:420px}.form{background:#fff;padding:30px;border-radius:12px}.field{margin-bottom:17px}.field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}.field input,.field textarea{width:100%;border:1px solid var(--line);padding:13px;border-radius:7px;background:#fafafa;outline:0}.field textarea{min-height:110px;resize:vertical}.field input:focus,.field textarea:focus{border-color:var(--coral);box-shadow:0 0 0 3px rgba(255,114,92,.18)}.form .btn{width:100%}.status{font-size:13px;margin-top:12px;color:#27733a;display:none}
footer{background:var(--ink);color:#fff;padding:58px 0 25px}.footer-top{display:flex;justify-content:space-between;gap:30px;padding-bottom:45px;border-bottom:1px solid #444}.footer-links{display:flex;gap:28px;color:#bbb;font-size:13px;flex-wrap:wrap}.footer-bottom{padding-top:22px;color:#888;font-size:12px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s,transform .6s}.reveal.show{opacity:1;transform:none}
@media(max-width:900px){.nav{gap:18px}.navlinks{gap:14px}.intro-grid,.story-grid,.contact-grid{grid-template-columns:1fr;gap:35px}.matrix .service{grid-column:span 6!important}.adv{grid-column:span 6!important}.products{overflow:auto}.product{min-width:280px}.timeline{grid-template-columns:repeat(5,190px);overflow:auto}.stats{grid-template-columns:repeat(3,1fr)}}
@media(max-width:650px){.container{width:min(100% - 32px,var(--max))}.topbar{display:none}header{position:relative}.nav{height:68px}.logo{font-size:18px}.menu{display:block;margin-left:auto}.navlinks{display:none;position:absolute;top:68px;left:0;right:0;background:var(--paper);padding:15px 20px;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:4px}.navlinks.open{display:flex}.navlinks a{width:100%;padding:11px 0}.nav .btn{display:none}.hero,.hero-inner{min-height:600px}.hero-copy p{font-size:15px}.dots{left:16px;bottom:28px}section{padding:75px 0}.section-head{display:block;margin-bottom:35px}.section-head p{margin-top:18px}.matrix,.adv-grid{display:grid;grid-template-columns:1fr}.matrix .service,.adv{grid-column:span 1!important}.products{margin-right:-16px}.product img{height:360px}.gallery{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:220px 180px}.gallery figure:first-child{grid-row:span 2}.gallery figure:nth-child(3){grid-column:span 2}.stats{grid-template-columns:repeat(2,1fr);gap:25px}.reviews,.news{grid-template-columns:1fr}.review:not(:first-child){display:none}.contact-grid{gap:28px}.footer-top{display:block}.footer-links{margin-top:25px;gap:15px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:8px}h1{letter-spacing:-3px}}
@media(prefers-reduced-motion:reduce){*,html{scroll-behavior:auto!important;transition:none!important}.reveal{opacity:1;transform:none}}