/* roulang page: index */
:root{--bg:#F4F1EC;--surface:#FFFFFF;--ink:#151515;--muted:#5F5B55;--line:rgba(21,21,21,.12);--brand:#D23F2A;--brand-dark:#A9271B;--moss:#2F6B5F;--night:#141414}
*{box-sizing:border-box;border-color:var(--line)}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
.wrap{max-width:1240px;margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding:96px 0}
@media(max-width:768px){.section{padding:60px 0}}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--brand);position:relative}
.eyebrow:before{content:"";display:inline-block;width:26px;height:2px;background:var(--brand);flex:none}
.site-nav{position:fixed;top:16px;left:50%;transform:translateX(-50%);z-index:80;width:min(1200px,calc(100% - 32px));border-radius:999px;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(21,21,21,.08);box-shadow:0 1px 2px rgba(21,21,21,.04),0 12px 32px -18px rgba(21,21,21,.22);padding:8px 20px}
.nav-link{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:999px;font-size:15px;font-weight:600;color:var(--muted);transition:all .2s ease}
.nav-link:hover{color:var(--ink);background:rgba(21,21,21,.05)}
.nav-link.active{color:#fff;background:var(--brand)}
.nav-toggle{display:none;min-width:44px;height:44px;border:none;background:transparent;border-radius:999px;align-items:center;justify-content:center;cursor:pointer;color:var(--ink)}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative;transition:all .2s}
.nav-toggle span:after,.nav-toggle span:before{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:all .2s}
.nav-toggle span:before{top:-6px}
.nav-toggle span:after{top:6px}
.mobile-menu{position:fixed;top:78px;left:16px;right:16px;z-index:79;background:#fff;border-radius:20px;border:1px solid var(--line);box-shadow:0 20px 48px -20px rgba(21,21,21,.28);padding:12px;display:none}
.mobile-menu.open{display:block}
@media(max-width:767.98px){.nav-menu{display:none}.nav-toggle{display:inline-flex}.mobile-menu{display:none}}
.hero-bg{background-color:#28231F;background-image:linear-gradient(100deg,rgba(20,20,20,.88) 5%,rgba(20,20,20,.5) 55%,rgba(20,20,20,.16) 100%),url('/assets/images/backpic/back-1.jpg');background-size:cover;background-position:center}
.hero-grid-overlay{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}
.eyebrow-light:before{background:#E8B4A8}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 28px;border-radius:999px;font-weight:700;font-size:15px;transition:all .2s ease;cursor:pointer;border:1px solid transparent}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark)}
.btn-primary:focus-visible,.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:#F4F1EC}
.btn-ghost-light{border-color:rgba(255,255,255,.45);color:#fff;background:rgba(255,255,255,.04)}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.6)}
.btn-ghost-dark{border-color:rgba(21,21,21,.18);color:var(--ink);background:transparent}
.btn-ghost-dark:hover{background:rgba(21,21,21,.05)}
.stat-label{font-size:14px;color:var(--muted)}
.stat-number{font-size:clamp(2rem,3vw,2.8rem);font-weight:800;letter-spacing:-.02em;line-height:1.1}
.stat-unit{font-size:1rem;font-weight:600;color:var(--muted);margin-left:2px}
.bento-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease}
.bento-card:hover{transform:translateY(-3px);border-color:rgba(21,21,21,.24);box-shadow:0 12px 30px -20px rgba(21,21,21,.16)}
.media-overlay{position:relative}
.media-overlay img{width:100%;height:100%;object-fit:cover}
.media-overlay:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(21,21,21,.02) 40%,rgba(21,21,21,.78) 100%)}
.vs-bg{background-color:#171717;background-image:radial-gradient(ellipse at 70% 20%,rgba(210,63,42,.16),transparent 62%),linear-gradient(180deg,#1C1A17,#131312)}
.compare-line{border-bottom:1px solid rgba(255,255,255,.08)}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:border-color .2s}
.faq-item[open]{border-color:rgba(21,21,21,.22)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 26px;font-weight:700;font-size:17px;user-select:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{position:relative;width:32px;height:32px;border-radius:50%;border:1px solid var(--line);flex:none;transition:all .25s}
.faq-icon:before,.faq-icon:after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--ink);border-radius:2px}
.faq-icon:before{width:12px;height:2px}
.faq-icon:after{width:2px;height:12px;transition:opacity .2s}
.faq-item[open] .faq-icon:after{opacity:0}
.faq-item[open] .faq-icon{background:var(--brand);border-color:var(--brand);transform:rotate(180deg)}
.faq-item[open] .faq-icon:before{background:#fff}
.faq-answer{padding:0 26px 24px;color:var(--muted);font-size:15px}
.form-box{background:var(--surface);border:1px solid var(--line);border-radius:24px;box-shadow:0 20px 50px -40px rgba(21,21,21,.2)}
.form-input{width:100%;border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:#FCFBF9;font-size:15px;color:var(--ink);outline:none;transition:border-color .2s,box-shadow .2s;box-sizing:border-box}
.form-input:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(210,63,42,.12);background:#fff}
.form-input::placeholder{color:#A9A29A}
#matrix,#faq,#contact{scroll-margin-top:100px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* roulang page: category1 */
:root{--bg:#F4F1EC;--surface:#FFFFFF;--ink:#151515;--muted:#5F5B55;--line:rgba(21,21,21,.12);--brand:#D23F2A;--brand-dark:#A9271B;--moss:#2F6B5F;--night:#141414}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
.wrap{width:min(1200px,100% - 32px);margin:0 auto}
.section{padding:64px 0}
@media(min-width:768px){.section{padding:88px 0}}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--brand)}
.eyebrow:before{content:"";display:inline-block;width:26px;height:2px;background:var(--brand);flex:none}
.eyebrow-light{color:#F0B7AB}
.eyebrow-light:before{background:#F0B7AB}
.site-nav{position:fixed;top:16px;left:50%;transform:translateX(-50%);z-index:80;width:min(1200px,calc(100% - 32px));border-radius:999px;background:rgba(255,255,255,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(21,21,21,.08);box-shadow:0 1px 2px rgba(21,21,21,.04),0 12px 32px -18px rgba(21,21,21,.22);padding:8px 20px}
.nav-link{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:999px;font-size:15px;font-weight:600;color:var(--muted);transition:all .2s ease}
.nav-link:hover{color:var(--ink);background:rgba(21,21,21,.05)}
.nav-link.active{color:#fff;background:var(--brand)}
.nav-toggle{display:none;min-width:44px;height:44px;border:none;background:transparent;border-radius:999px;align-items:center;justify-content:center;cursor:pointer;color:var(--ink)}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative;transition:all .2s}
.nav-toggle span:after,.nav-toggle span:before{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:all .2s}
.nav-toggle span:before{top:-6px}
.nav-toggle span:after{top:6px}
.nav-toggle.open span{background:transparent}
.nav-toggle.open span:before{top:0;transform:rotate(45deg)}
.nav-toggle.open span:after{top:0;transform:rotate(-45deg)}
.mobile-menu{position:fixed;top:80px;left:16px;right:16px;z-index:79;background:#fff;border-radius:20px;border:1px solid var(--line);box-shadow:0 20px 48px -20px rgba(21,21,21,.28);padding:12px;transform:translateY(6px);opacity:0;pointer-events:none;transition:all .22s ease}
.mobile-menu.open{opacity:1;pointer-events:auto;transform:translateY(0)}
.mobile-menu .nav-link{display:flex;width:100%;justify-content:flex-start;border-radius:14px}
@media(max-width:767.98px){.nav-menu{display:none}.nav-toggle{display:inline-flex}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 28px;border-radius:999px;font-weight:700;font-size:15px;transition:all .2s ease;cursor:pointer;border:1px solid transparent;white-space:nowrap}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark)}
.btn-light{background:#fff;color:var(--ink);border-color:#fff}
.btn-light:hover{background:#F4F1EC}
.btn-ghost-light{border-color:rgba(255,255,255,.45);color:#fff;background:rgba(255,255,255,.04)}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.6)}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.category-hero{position:relative;background-color:#29241F;background-image:linear-gradient(102deg,rgba(20,20,20,.92) 8%,rgba(20,20,20,.66) 48%,rgba(20,20,20,.3) 92%),url('/assets/images/backpic/back-3.jpg');background-size:cover;background-position:center 38%;color:#fff;overflow:hidden;padding-top:120px;padding-bottom:64px}
.category-hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:52px 52px;pointer-events:none}
.category-hero .hero-inner{position:relative;z-index:2}
.breadcrumb{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.58);border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.05);border-radius:999px;padding:7px 14px;backdrop-filter:blur(4px)}
.breadcrumb a{transition:color .2s}
.breadcrumb a:hover{color:#fff}
.data-ribbon{background:var(--night);color:#fff;border-radius:20px;padding:30px 34px;display:grid;grid-template-columns:repeat(2,1fr);gap:24px 28px;margin-top:48px}
@media(min-width:768px){.data-ribbon{grid-template-columns:repeat(4,1fr)}}
.data-cell{display:flex;flex-direction:column;gap:4px;position:relative}
.data-cell:after{content:"";position:absolute;right:-14px;top:8%;height:84%;width:1px;background:rgba(255,255,255,.12);display:none}
@media(min-width:768px){.data-cell:after{display:block}.data-cell:last-child:after{display:none}}
.data-cell strong{font-size:clamp(1.8rem,4vw,2.7rem);font-weight:800;letter-spacing:-.04em;line-height:1.1;font-variant-numeric:tabular-nums}
.data-cell span{font-size:13px;color:rgba(255,255,255,.58)}
.feature-frame{position:relative;min-height:260px;background-color:#E9E4DC;background-size:cover;background-position:center;overflow:hidden;border-radius:20px}
.feature-frame img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.feature-frame:after{content:"";position:absolute;inset:0;background:linear-gradient(200deg,rgba(20,20,20,.03) 10%,rgba(20,20,20,.78) 100%)}
.cover-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:transform .2s ease,box-shadow .2s ease,border-color .2s}
.cover-card:hover{transform:translateY(-3px);border-color:rgba(21,21,21,.24);box-shadow:0 18px 40px -24px rgba(21,21,21,.24)}
.format-row{display:grid;grid-template-columns:1fr;background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:transform .2s ease,border-color .2s,box-shadow .2s}
@media(min-width:560px){.format-row{grid-template-columns:160px 1fr}}
.format-row:hover{transform:translateY(-2px);border-color:rgba(21,21,21,.22);box-shadow:0 16px 34px -24px rgba(21,21,21,.28)}
.format-thumb{position:relative;min-height:150px;background-color:#E6E0D6;background-size:cover;background-position:center}
.format-thumb:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(21,21,21,0),rgba(21,21,21,.18))}
.format-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.format-body{padding:24px}
.format-tag{display:inline-flex;align-items:center;line-height:1;font-size:12px;font-weight:700;border-radius:999px;padding:6px 11px;border:1px solid rgba(210,63,42,.24);color:var(--brand);background:rgba(210,63,42,.05);flex:none}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:24px}
.tag-pill{display:inline-flex;align-items:center;min-height:34px;padding:0 14px;border-radius:999px;border:1px solid rgba(21,21,21,.14);color:#5F5B55;font-size:13px;font-weight:600;transition:all .2s ease}
a.tag-pill:hover{border-color:var(--brand);color:var(--brand);background:rgba(210,63,42,.05)}
.side-stat-row{display:flex;justify-content:space-between;align-items:baseline;padding:14px 0;border-bottom:1px solid var(--line)}
.side-stat-row:last-child{border-bottom:none;padding-bottom:2px}
.side-stat-row .val{font-weight:800;font-size:20px;font-variant-numeric:tabular-nums}
.cta-band{position:relative;background-color:#1C1A17;background-image:linear-gradient(100deg,rgba(20,20,20,.92) 10%,rgba(20,20,20,.66) 68%,rgba(20,20,20,.4) 100%),url('/assets/images/backpic/back-5.jpg');background-size:cover;background-position:center;color:#fff;overflow:hidden;border-radius:28px;padding:52px 28px}
@media(min-width:768px){.cta-band{padding:64px}}
.cta-band:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:44px 44px}
.num-mark{font-size:13px;font-weight:800;letter-spacing:.05em;color:rgba(255,255,255,.4)}
main{overflow:hidden}
#formats{scroll-margin-top:110px}
@media(max-width:767.98px){.site-nav{width:calc(100% - 24px);padding:6px 14px}.wrap{width:calc(100% - 28px)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}