/* roulang page: index */
:root{
--ink:#1E3A3F;--magenta:#C2185B;--cyan:#0E8A8A;--paper-yellow:#E4D4A8;--black:#121417;
--bg:#F6F3EC;--bg-gray:#EFEBE3;--bg-cyan:#E4ECEC;--text:#1A2224;--muted:#5A6568;
--line:#D5CFC3;--white:#FFFBFA;--radius:4px;--radius-card:6px;--shadow:0 6px 18px rgba(18,20,23,.08);
--space:8px;--container:1220px;--header-top:36px;--header-main:72px;
--fs-xs:12px;--fs-sm:13px;--fs-base:17px;--fs-h3:20px;--fs-h2:30px;--fs-h1:46px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
body{font-family:"PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);font-size:var(--fs-base);line-height:1.8;letter-spacing:.01em}
img{max-width:100%;display:block;height:auto}
a{color:var(--ink);text-decoration:none;transition:color .2s,background .2s,border-color .2s}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em;line-height:1.8}
p+p{margin-top:.95em}
h1,h2,h3{margin:0;color:var(--ink);letter-spacing:.02em;line-height:1.28;font-weight:700}
.skip{position:absolute;left:-999px;top:8px;background:var(--magenta);color:#fff;padding:8px 14px;z-index:200}
.skip:focus{left:8px}
.container{width:min(100% - 32px,var(--container));margin:0 auto}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace}
.site-header{position:sticky;top:0;z-index:100;background:rgba(246,243,236,.96);backdrop-filter:saturate(1.2);border-bottom:1px solid var(--line)}
.topbar{height:var(--header-top);background:var(--ink);color:#E8E2D6;font-size:var(--fs-sm);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:#E8E2D6}
.topbar a:hover,.topbar a:focus{color:var(--paper-yellow)}
.top-cta{color:#fff !important;border-bottom:1px solid var(--magenta);padding-bottom:1px}
.mainbar{height:var(--header-main);display:flex;align-items:center}
.mainbar .container{display:flex;align-items:center;gap:20px}
.logo{display:flex;align-items:center;gap:10px;min-height:44px;color:var(--ink);font-weight:800;font-size:18px;white-space:nowrap}
.logo-mark{width:28px;height:28px;border:2px solid var(--ink);position:relative;flex:0 0 28px}
.logo-mark::before,.logo-mark::after{content:"";position:absolute;background:var(--magenta)}
.logo-mark::before{width:12px;height:2px;left:6px;top:11px}
.logo-mark::after{width:2px;height:12px;left:11px;top:6px}
.nav{display:flex;gap:6px;margin-left:auto;align-items:center}
.nav a{padding:10px 10px;min-height:44px;display:inline-flex;align-items:center;color:var(--ink);font-size:15px;border-bottom:2px solid transparent}
.nav a:hover,.nav a.is-active{color:var(--magenta);border-bottom-color:var(--magenta)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:3px;border:1px solid transparent;font-weight:700;letter-spacing:.04em;transition:background .2s,color .2s,border-color .2s,transform .15s;text-align:center}
.btn:focus-visible,.nav a:focus-visible,.topbar a:focus-visible,summary:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--magenta);outline-offset:3px}
.btn-primary{background:var(--magenta);color:#fff}
.btn-primary:hover,.btn-primary:active{background:var(--ink);color:#fff}
.btn-ghost{background:transparent;color:#fff;border-color:#fff}
.btn-ghost:hover{background:#fff;color:var(--ink)}
.btn-line{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-line:hover{background:var(--ink);color:#fff}
.header-cta{margin-left:8px}
.icon-btns{display:none;gap:8px;margin-left:auto}
.icon-btn{width:44px;height:44px;border:1px solid var(--line);background:#fff;color:var(--ink);display:inline-flex;align-items:center;justify-content:center;border-radius:3px}
.burger{width:44px;height:44px;border:1px solid var(--line);background:#fff;display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px}
.burger span{display:block;width:18px;height:2px;background:var(--ink)}
.drawer{position:fixed;inset:0;background:var(--bg);z-index:120;transform:translateX(100%);transition:transform .28s;padding:24px;overflow:auto}
.drawer.open{transform:none}
.drawer a{display:flex;align-items:center;min-height:48px;border-bottom:1px solid var(--line);font-size:18px;font-weight:700}
body.lock{overflow:hidden}
.site-header.compact{--header-main:58px}
.hero{position:relative;min-height:calc(100vh - 108px);background:var(--black);color:#fff;overflow:hidden}
.slides{position:relative;min-height:inherit}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .6s;background:#121417 center/cover no-repeat}
.slide.is-on{opacity:1;z-index:1}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(30,58,63,.72),rgba(18,20,23,.46) 55%,rgba(18,20,23,.28));z-index:0}
.slide-inner{position:relative;z-index:2;width:min(100% - 32px,var(--container));margin:0 auto;padding:88px 0 110px;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.7fr);gap:40px;align-items:end;min-height:inherit}
.kicker{display:inline-flex;align-items:center;gap:8px;color:var(--paper-yellow);font-size:13px;letter-spacing:.18em;text-transform:uppercase;margin-bottom:16px}
.kicker i{width:28px;height:6px;background:var(--magenta);display:inline-block}
.hero h1{color:#fff;font-size:clamp(30px,4.6vw,46px);max-width:16em;margin-bottom:18px}
.hero .lead{max-width:38em;color:#F3EEE4;font-size:17px;line-height:1.85;margin-bottom:22px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
.hero-panel{background:rgba(18,20,23,.55);border:1px solid rgba(228,212,168,.28);padding:22px;border-radius:6px;backdrop-filter:blur(2px)}
.hero-panel h3{color:#fff;font-size:16px;margin-bottom:10px}
.bar{height:8px;background:#2A3336;border-radius:2px;overflow:hidden;margin:10px 0 8px}
.bar>span{display:block;height:100%;width:70%;background:linear-gradient(90deg,var(--magenta),var(--cyan))}
.panel-meta{display:flex;justify-content:space-between;color:#E4D4A8;font-size:13px}
.panel-list{margin-top:14px;color:#EDE7DC;font-size:14px}
.panel-list li{padding:6px 0 6px 14px;position:relative}
.panel-list li::before{content:"";width:6px;height:6px;background:var(--cyan);position:absolute;left:0;top:12px}
.hero-ctrl{position:absolute;left:0;right:0;bottom:22px;z-index:3;width:min(100% - 32px,var(--container));margin:0 auto;display:flex;align-items:center;gap:16px}
.dots{display:flex;gap:8px}
.dot{width:28px;height:6px;background:rgba(255,255,255,.35);border:0;padding:0;border-radius:0}
.dot.is-on{background:var(--magenta)}
.arrow{width:44px;height:44px;border:1px solid #fff;background:transparent;color:#fff;margin-left:auto}
.arrow:hover{background:#fff;color:var(--ink)}
.pause{min-width:44px;height:44px;border:1px solid #fff;background:transparent;color:#fff;padding:0 12px}
.reg-frame{position:absolute;inset:16px;border:1px solid rgba(228,212,168,.25);pointer-events:none;z-index:2}
.reg-frame::before,.reg-frame::after{content:"+";position:absolute;color:var(--magenta);font-size:18px}
.reg-frame::before{top:-8px;left:-4px}
.reg-frame::after{bottom:-10px;right:-4px}
.sec{padding:88px 0;position:relative}
.sec-head{margin-bottom:28px}
.sec-no{display:inline-block;color:var(--magenta);font-size:12px;letter-spacing:.2em;margin-bottom:10px}
.sec h2{font-size:clamp(24px,3vw,30px);margin-bottom:16px;max-width:16em}
.sec-head p,.intro-copy p,.faq-lead,.news-lead,.cta-copy p{color:var(--muted)}
.sec.alt{background:var(--bg-gray)}
.sec.cyan{background:var(--bg-cyan)}
.sec.dark{background:var(--black);color:#EDE7DC}
.sec.dark h2,.sec.dark h3{color:#fff}
.hair{position:absolute;left:0;right:0;top:0;height:4px;background:linear-gradient(90deg,var(--magenta) 12px,#F6C6A0 12px 24px,#0E8A8A 24px 36px,#121417 36px 48px,transparent 48px)}
.sell{display:grid;grid-template-columns:repeat(3,1fr);padding:0}
.sell-item{padding:28px 28px 26px;min-height:132px;border-bottom:3px solid transparent;transition:background .2s,border-color .2s}
.sell-item:nth-child(1){background:#1E3A3F;color:#F6F3EC}
.sell-item:nth-child(2){background:#163236;color:#F6F3EC}
.sell-item:nth-child(3){background:#0F2A2E;color:#F6F3EC}
.sell-item:hover{border-bottom-color:var(--magenta);background:#12292d}
.sell-item strong{display:block;font-size:22px;margin:6px 0 4px}
.sell-item span{color:var(--paper-yellow);font-size:13px;letter-spacing:.12em}
.sell-item p{margin:0;color:#D9D3C7;font-size:15px}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.media{position:relative;border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow)}
.media img{width:100%;height:100%;object-fit:cover;min-height:360px;aspect-ratio:4/3}
.corner{position:absolute;width:18px;height:18px;border:2px solid var(--magenta);z-index:1}
.corner.tl{top:10px;left:10px;border-right:0;border-bottom:0}
.corner.br{right:10px;bottom:10px;border-left:0;border-top:0}
.param{width:100%;border-collapse:collapse;margin-top:18px;font-size:15px;background:#fff}
.param th,.param td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.param th{background:var(--bg-cyan);width:34%;font-weight:700;color:var(--ink)}
.scene{display:grid;grid-template-columns:1.2fr .8fr;gap:28px}
.scene-visual{min-height:420px;background:#111 center/cover no-repeat;border-radius:6px;position:relative}
.scene-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(18,20,23,.55))}
.scene-caption{position:absolute;left:18px;bottom:16px;z-index:1;color:#fff}
.steps{display:flex;flex-direction:column;gap:0;border-left:2px solid var(--line)}
.step{padding:16px 18px 16px 22px;border-bottom:1px solid var(--line);background:transparent;cursor:pointer;text-align:left;color:inherit}
.step h3{font-size:18px;margin-bottom:6px}
.step p{margin:0;font-size:15px;color:var(--muted)}
.step.is-on{background:#fff;border-left:4px solid var(--magenta);margin-left:-2px}
.bite{display:inline-block;min-width:28px;height:20px;line-height:20px;text-align:center;background:var(--ink);color:#fff;font-size:12px;margin-right:8px}
.bento{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(170px,auto);gap:14px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;position:relative;transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--cyan);transform:translateY(-2px)}
.card img{width:100%;height:140px;object-fit:cover}
.card-body{padding:16px 16px 18px}
.card h3{font-size:18px;margin-bottom:8px}
.card p,.spec li{font-size:15px;color:var(--muted);margin:0}
.card.wide{grid-column:span 2;grid-row:span 2}
.card.wide img{height:220px}
.tag{display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--cyan);border:1px solid var(--cyan);padding:2px 7px;margin-bottom:8px}
.products{display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:16px}
.product{background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;display:flex;flex-direction:column}
.product img{width:100%;height:230px;object-fit:cover}
.product.main img{height:320px}
.product-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.spec{display:flex;flex-direction:column;gap:6px}
.spec li{padding-left:12px;position:relative}
.spec li::before{content:"";width:6px;height:1px;background:var(--magenta);position:absolute;left:0;top:11px}
.case{display:grid;grid-template-columns:220px 1fr;gap:32px;align-items:start}
.case-no{font-size:84px;line-height:1;color:rgba(14,138,138,.55);font-weight:800;font-variant-numeric:tabular-nums}
.case-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}
.case ul{display:grid;gap:8px}
.case li{padding:10px 0;border-bottom:1px solid rgba(228,212,168,.2)}
.table-wrap{overflow:auto;border:1px solid var(--line);background:#fff}
.compare{width:100%;border-collapse:collapse;min-width:720px;font-size:15px}
.compare th,.compare td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
.compare thead th{background:var(--ink);color:#fff}
.compare tbody th{position:sticky;left:0;background:#fff;z-index:1;font-weight:700}
.compare td.hi{box-shadow:inset 3px 0 0 var(--magenta);background:#FBF4F7;font-weight:700}
.stories{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.story{display:grid;grid-template-columns:.9fr 1.1fr;background:#fff;border:1px solid var(--line);overflow:hidden;border-radius:6px}
.story img{width:100%;height:100%;object-fit:cover;min-height:220px}
.quote{padding:22px}
.quote blockquote{margin:0 0 12px;font-size:16px;color:var(--text)}
.quote cite{font-style:normal;color:var(--muted);font-size:13px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);background:var(--ink);color:#F6F3EC}
.stat{padding:36px 24px;border-right:1px solid rgba(255,255,255,.08)}
.stat strong{display:block;font-size:40px;line-height:1.1;margin-bottom:8px;color:#fff}
.stat span{color:var(--paper-yellow);font-size:14px}
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.review{background:#fff;border:1px solid var(--line);padding:20px;border-radius:6px}
.stars{color:var(--magenta);letter-spacing:2px;margin-bottom:8px;font-size:13px}
.news{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}
.news-feature{position:relative;min-height:340px;overflow:hidden;border-radius:6px}
.news-feature img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.news-feature .shade{position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(18,20,23,.78));}
.news-feature .txt{position:absolute;left:20px;right:20px;bottom:18px;color:#fff;z-index:1}
.news-list{display:flex;flex-direction:column}
.news-list a{display:block;padding:16px 0;border-bottom:1px solid var(--line);min-height:44px}
.news-list a:hover h3{color:var(--magenta)}
.news-list time{display:block;color:var(--cyan);font-size:12px;margin-bottom:4px}
.more{margin-top:12px;display:inline-flex}
.faq{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);background:#fff}
.faq-item button{width:100%;text-align:left;background:none;border:0;padding:18px 16px;min-height:56px;display:flex;justify-content:space-between;gap:16px;font-weight:700;color:var(--ink)}
.faq-item .ans{display:none;padding:0 16px 18px;color:var(--muted)}
.faq-item.open .ans{display:block}
.faq-item button span{color:var(--magenta)}
.guarantees{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.badge{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);padding:16px;min-height:84px}
.badge i{width:36px;height:36px;border:1px solid var(--cyan);display:grid;place-items:center;color:var(--cyan);flex:0 0 36px}
.inspect{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.inspect article{background:#fff;border-top:4px solid var(--cyan);padding:20px;border:1px solid var(--line);border-top-width:4px}
.flow{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.flow li{background:var(--bg-gray);padding:8px 12px}
.cta-box{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;background:#fff;border:1px solid var(--line);padding:28px;border-radius:6px}
.checks li{padding:8px 0 8px 22px;position:relative}
.checks li::before{content:"▣";position:absolute;left:0;color:var(--magenta)}
form{display:grid;gap:12px}
label{font-size:14px;font-weight:700;color:var(--ink)}
.field{display:flex;flex-direction:column;gap:6px}
input,select,textarea{border:1px solid var(--line);background:var(--bg);padding:12px;min-height:44px;border-radius:3px;color:var(--text)}
textarea{min-height:96px;resize:vertical}
.err input,.err select,.err textarea{border-color:#A11313;background:#FDECEC}
.err-txt{display:none;color:#A11313;font-size:13px}
.err .err-txt{display:block}
.ok{display:none;background:var(--bg-cyan);border:1px solid var(--cyan);padding:16px;color:var(--ink)}
.ok.show{display:block}
.site-footer{background:#163236;color:#D9D3C7;padding:56px 0 24px}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1.1fr;gap:28px;margin-bottom:28px}
.site-footer h3{color:#fff;font-size:16px;margin-bottom:12px}
.site-footer a{color:#D9D3C7}
.site-footer a:hover{color:#fff}
.legal{border-top:1px solid rgba(255,255,255,.1);padding-top:16px;font-size:13px;display:flex;flex-wrap:wrap;gap:12px 24px}
.dock{position:fixed;left:0;right:0;bottom:0;z-index:90;background:var(--ink);color:#fff;transform:translateY(110%);transition:transform .25s;border-top:3px solid var(--magenta)}
.dock.show{transform:none}
.dock .container{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0;min-height:64px}
.dock p{margin:0}
body.form-on .dock{transform:translateY(110%)}
.cmyk{position:absolute;right:18px;top:18px;display:flex;gap:4px;z-index:2}
.cmyk b{width:8px;height:8px;display:block}
.cmyk b:nth-child(1){background:#00AEEF}
.cmyk b:nth-child(2){background:#EC008C}
.cmyk b:nth-child(3){background:#FFF200}
.cmyk b:nth-child(4){background:#231F20}
@media (max-width:1024px){
.slide-inner,.split,.scene,.case,.case-grid,.news,.cta-box,.foot-grid,.products{grid-template-columns:1fr}
.bento{grid-template-columns:repeat(2,1fr)}
.card.wide{grid-column:span 2}
.nav{display:none}
.burger{display:flex;margin-left:8px}
.header-cta{display:none}
.icon-btns{display:flex}
.hero h1{font-size:34px}
}
@media (max-width:768px){
.topbar-left span:nth-child(2),.topbar-left span:nth-child(3){display:none}
.sell,.stats,.reviews,.guarantees,.inspect,.stories{grid-template-columns:1fr}
.story{grid-template-columns:1fr}
.arrow{display:none}
.slide-inner{padding:64px 0 96px;grid-template-columns:1fr}
.sec{padding:64px 0}
.stat strong{font-size:32px}
.dock .container{flex-direction:column;align-items:stretch}
.dock-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.case{grid-template-columns:1fr}
.case-no{font-size:56px}
}
@media (max-width:520px){
.hero h1{font-size:28px;max-width:12em}
.container{width:min(100% - 24px,var(--container))}
.bento,.products{grid-template-columns:1fr}
.card.wide{grid-column:auto}
.logo{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
.slide,.card,.dock,.drawer,.bar>span{transition:none}
}