/* roulang page: index */
:root{
  --ink:#17191C;
  --accent:#F0512B;
  --accent-dark:#C93E1C;
  --accent-soft:#FDECE6;
  --graphite:#3A3E44;
  --muted:#6B7076;
  --paper:#F6F4F0;
  --card:#FFFFFF;
  --line:#E5E1D9;
  --line-strong:#D8D3C9;
  --green:#1E9E6A;
  --img-bg:#EFECE6;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-xs:10px;
  --sh-1:0 1px 2px rgba(23,25,28,.05);
  --sh-2:0 12px 28px -14px rgba(23,25,28,.28);
}
.page-body{
  margin:0;padding:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--paper);
  color:var(--graphite);
  font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
.page-body h1,.page-body h2,.page-body h3,.page-body h4{margin:0;color:var(--ink);}
.page-body p{margin:0;}
.page-body ul{margin:0;padding:0;list-style:none;}
.page-body a{color:inherit;text-decoration:none;}
.page-body img{display:block;max-width:100%;}
.page-body button{font-family:inherit;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--plain{padding-bottom:0;}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(246,244,240,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:baseline;gap:3px;font-size:21px;line-height:1;letter-spacing:-.01em;color:var(--ink);}
.brand b{font-weight:800;}
.brand em{font-style:normal;font-weight:400;font-size:17px;color:var(--muted);}
.main-nav{display:flex;align-items:center;gap:32px;}
.nav-link{position:relative;display:inline-block;padding:8px 0;font-size:15px;font-weight:500;color:var(--ink);transition:color .16s ease;}
.nav-link::after{content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;background:var(--accent);transition:left .16s ease,right .16s ease;}
.nav-link:hover,.nav-link:focus-visible{color:var(--accent);}
.nav-link:hover::after,.nav-link:focus-visible::after,.nav-link.is-active::after{left:0;right:0;}
.nav-link.is-active{color:var(--accent);}
.header-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid transparent;border-radius:var(--r-xs);background:transparent;color:var(--ink);cursor:pointer;transition:background-color .16s ease,border-color .16s ease;}
.icon-btn:hover{background:#fff;border-color:var(--line);}
.icon-btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px;}
.mega-wrap{position:relative;}
.mega-trigger{display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 14px;border:1px solid var(--line-strong);border-radius:var(--r-xs);background:#fff;font-size:14px;font-weight:600;color:var(--ink);cursor:pointer;transition:border-color .16s ease,color .16s ease;}
.mega-trigger:hover{border-color:var(--ink);color:var(--accent);}
.mega-trigger:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.mega-panel{position:absolute;right:0;top:calc(100% + 14px);width:720px;max-width:calc(100vw - 48px);background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:0 24px 48px -28px rgba(23,25,28,.4);padding:20px;display:grid;grid-template-columns:1.15fr 1fr;gap:18px;opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .18s ease,transform .18s ease,visibility .18s;z-index:70;}
.mega-wrap:hover .mega-panel,.mega-wrap:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-col-title{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--muted);padding:0 12px 8px;}
.mega-link{display:block;padding:10px 12px;border-radius:var(--r-xs);transition:background-color .16s ease;}
.mega-link:hover,.mega-link:focus-visible{background:var(--paper);outline:none;}
.mega-link strong{display:block;font-size:15px;font-weight:600;color:var(--ink);}
.mega-link span{display:block;font-size:13px;color:var(--muted);line-height:1.6;}
.mega-card{display:flex;align-items:center;gap:10px;padding:10px;border:1px solid var(--line);border-radius:var(--r-sm);transition:border-color .16s ease,box-shadow .16s ease;}
.mega-card:hover{border-color:rgba(240,81,43,.45);box-shadow:var(--sh-1);}
.mega-card img{width:64px;height:48px;object-fit:cover;border-radius:8px;background:var(--img-bg);}
.mega-card b{display:block;font-size:14px;font-weight:600;color:var(--ink);}
.mega-card small{font-size:12px;color:var(--muted);}
.search-wrap{position:relative;}
.search-panel{position:absolute;right:0;top:calc(100% + 14px);width:320px;max-width:calc(100vw - 48px);background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:0 20px 40px -24px rgba(23,25,28,.4);padding:14px;z-index:70;}
.search-panel form{display:flex;gap:8px;}
.search-panel input{flex:1;height:40px;padding:0 12px;border:1px solid var(--line);border-radius:var(--r-xs);font-size:14px;color:var(--ink);background:#fff;}
.search-panel input::placeholder{color:#A6A29A;}
.search-panel input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(240,81,43,.14);}
.search-panel p{margin-top:10px;font-size:12px;color:var(--muted);}
.hamburger{display:none;align-items:center;justify-content:center;width:42px;height:42px;border:1px solid var(--line-strong);border-radius:var(--r-xs);background:#fff;cursor:pointer;}
.hamburger span{display:block;width:16px;height:2px;background:var(--ink);position:relative;}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);}
.hamburger span::before{top:-5px;}
.hamburger span::after{top:5px;}

/* ---------- 抽屉 ---------- */
#navToggle{position:absolute;opacity:0;pointer-events:none;}
.drawer-mask{display:none;position:fixed;inset:0;background:rgba(23,25,28,.45);z-index:80;}
.drawer{position:fixed;top:0;right:0;width:84vw;max-width:360px;height:100%;background:#fff;z-index:90;transform:translateX(100%);transition:transform .22s ease;padding:24px;overflow-y:auto;box-shadow:-24px 0 48px -24px rgba(23,25,28,.4);}
#navToggle:checked ~ .drawer{transform:translateX(0);}
#navToggle:checked ~ .drawer-mask{display:block;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--line);border-radius:var(--r-xs);background:#fff;color:var(--ink);cursor:pointer;font-size:18px;line-height:1;}
.drawer-list{margin-bottom:24px;}
.drawer-list a{display:block;padding:12px 0 12px 14px;border-bottom:1px solid var(--line);font-size:15px;font-weight:500;color:var(--ink);position:relative;}
.drawer-list a.is-active{color:var(--accent);}
.drawer-list a.is-active::before{content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;border-radius:2px;background:var(--accent);}
.drawer-sub{padding:12px 0 12px 14px;border-bottom:1px solid var(--line);}
.drawer-sub b{display:block;font-size:12px;letter-spacing:.08em;color:var(--muted);margin-bottom:6px;}
.drawer-sub a{display:block;padding:6px 0;font-size:14px;color:var(--graphite);border:0;}

/* ---------- 按钮与徽章 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border:1px solid transparent;border-radius:var(--r-sm);font-size:15px;font-weight:600;cursor:pointer;transition:background-color .17s ease,color .17s ease,border-color .17s ease,transform .17s ease,box-shadow .17s ease;}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink);}
.btn-ghost:hover{background:#fff;border-color:var(--ink);}
.btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px;}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:var(--r-xs);}
.btn-block{width:100%;}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent-dark);font-size:13px;font-weight:600;line-height:1;}
.badge-gray{background:#EFECE6;color:var(--ink);}
.badge-float{position:absolute;left:12px;top:12px;z-index:2;}
.badge-green{background:rgba(30,158,106,.12);color:var(--green);}

/* ---------- Hero ---------- */
.hero{padding:72px 0 88px;}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.hero h1{font-size:clamp(30px,4.2vw,52px);font-weight:800;line-height:1.15;letter-spacing:-.01em;margin-top:18px;}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.7;color:var(--graphite);max-width:520px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;}
.hero-trust{display:flex;flex-wrap:wrap;gap:22px;margin-top:32px;}
.trust-item{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--muted);}
.trust-item svg{flex:none;color:var(--accent);}
.hero-visual{position:relative;border-radius:var(--r-lg);overflow:hidden;background:var(--img-bg);aspect-ratio:5/4;box-shadow:var(--sh-1);}
.hero-visual img{width:100%;height:100%;object-fit:cover;}
.hero-info{position:absolute;left:16px;top:16px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:14px 16px;box-shadow:0 10px 24px -18px rgba(23,25,28,.5);min-width:196px;}
.hero-info b{display:block;font-size:14px;font-weight:700;color:var(--ink);}
.hero-info span{display:block;font-size:12px;color:var(--muted);margin-top:2px;}
.hero-info .hero-price{margin-top:8px;font-size:19px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums;}

/* ---------- 板块标题 ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.section-title{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.25;}
.section-desc{margin-top:8px;font-size:15px;color:var(--muted);}
.link-more{flex:none;font-size:14px;font-weight:600;color:var(--ink);padding-bottom:2px;border-bottom:1px solid var(--accent);transition:color .16s ease;}
.link-more:hover{color:var(--accent);}

/* ---------- 商品卡 ---------- */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.product-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;}
.product-card:hover{transform:translateY(-3px);border-color:rgba(240,81,43,.45);box-shadow:var(--sh-2);}
.product-media{position:relative;aspect-ratio:4/3;background:var(--img-bg);overflow:hidden;}
.product-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.product-card:hover .product-media img{transform:scale(1.02);}
.product-body{display:flex;flex-direction:column;gap:8px;padding:16px;flex:1;}
.product-body h3{font-size:18px;font-weight:600;line-height:1.4;}
.product-desc{font-size:14px;line-height:1.7;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.price{display:flex;align-items:baseline;gap:4px;margin-top:auto;padding-top:8px;font-variant-numeric:tabular-nums;}
.price-num{font-size:22px;font-weight:800;color:var(--accent);line-height:1.2;}
.price-unit{font-size:13px;color:var(--muted);}
.product-actions{display:flex;gap:8px;margin-top:12px;}
.product-actions .btn{flex:1;}

/* ---------- 内容列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;}
.post-card:hover{transform:translateY(-3px);border-color:rgba(240,81,43,.45);box-shadow:var(--sh-2);}
.post-media{position:relative;aspect-ratio:16/9;background:var(--img-bg);overflow:hidden;}
.post-media img{width:100%;height:100%;object-fit:cover;}
.post-body{display:flex;flex-direction:column;gap:8px;padding:16px;flex:1;}
.post-body h3{font-size:16px;font-weight:600;line-height:1.55;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-excerpt{font-size:13px;line-height:1.7;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:10px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);}
.post-meta .arrow{color:var(--accent);font-weight:700;}
.empty-state{grid-column:1 / -1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-height:200px;padding:32px;background:#fff;border:1px dashed var(--line-strong);border-radius:var(--r-lg);text-align:center;color:var(--muted);font-size:14px;}
.empty-state svg{color:var(--line-strong);}
.empty-links{display:flex;gap:20px;font-size:14px;font-weight:600;}
.empty-links a{color:var(--ink);border-bottom:1px solid var(--accent);padding-bottom:2px;}
.empty-links a:hover{color:var(--accent);}

/* ---------- 评价 ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.review-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;box-shadow:var(--sh-1);transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;}
.review-card:hover{transform:translateY(-3px);border-color:rgba(240,81,43,.45);box-shadow:var(--sh-2);}
.stars{display:flex;gap:3px;color:var(--accent);}
.review-text{margin-top:14px;font-size:15px;line-height:1.75;color:var(--graphite);flex:1;}
.review-user{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);}
.review-name{font-weight:600;color:var(--ink);}
.review-tag{display:inline-flex;align-items:center;height:22px;padding:0 8px;margin-left:8px;border-radius:999px;background:#EFECE6;color:var(--ink);font-size:12px;font-weight:500;vertical-align:middle;}

/* ---------- 保障条 ---------- */
.guarantee{background:var(--ink);border-radius:20px;padding:40px;display:grid;grid-template-columns:repeat(4,1fr);}
.g-item{padding:0 24px;border-left:1px solid rgba(255,255,255,.12);}
.g-item:first-child{border-left:0;padding-left:0;}
.g-item svg{color:var(--accent);margin-bottom:10px;}
.g-item h3{color:#fff;font-size:15px;font-weight:700;line-height:1.4;}
.g-item p{margin-top:4px;font-size:13px;line-height:1.6;color:rgba(255,255,255,.6);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-size:22px;line-height:1;font-weight:400;color:var(--muted);transition:transform .18s ease,color .18s ease;}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--accent);}
.faq-item summary:hover{color:var(--accent);}
.faq-item summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.faq-answer{padding:0 0 20px 16px;font-size:15px;line-height:1.8;color:var(--graphite);}

/* ---------- CTA ---------- */
.cta-card{display:flex;align-items:center;justify-content:space-between;gap:32px;background:var(--accent-soft);border-radius:20px;padding:48px;}
.cta-card h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3;}
.cta-card p{margin-top:10px;font-size:15px;color:var(--graphite);}
.cta-actions{display:flex;align-items:center;gap:20px;flex:none;}
.cta-link{font-size:15px;font-weight:600;color:var(--ink);padding-bottom:2px;border-bottom:1px solid var(--ink);transition:color .16s ease,border-color .16s ease;}
.cta-link:hover{color:var(--accent-dark);border-color:var(--accent-dark);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.62);padding:64px 0 0;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-col h4{margin:0 0 16px;font-size:14px;font-weight:600;color:rgba(255,255,255,.5);}
.footer-brand{display:inline-flex;align-items:baseline;gap:3px;font-size:20px;line-height:1;color:#fff;}
.footer-brand b{font-weight:800;}
.footer-brand em{font-style:normal;font-weight:400;font-size:16px;color:rgba(255,255,255,.6);}
.footer-desc{margin-top:14px;font-size:14px;line-height:1.75;max-width:280px;}
.footer-links li{margin-bottom:10px;}
.footer-links a{position:relative;display:inline-block;padding-left:0;font-size:14px;color:rgba(255,255,255,.62);transition:color .16s ease,padding-left .16s ease;}
.footer-links a::before{content:"";position:absolute;left:0;top:50%;width:4px;height:4px;border-radius:50%;background:var(--accent);transform:translateY(-50%) scale(0);transition:transform .16s ease;}
.footer-links a:hover{color:#fff;padding-left:12px;}
.footer-links a:hover::before{transform:translateY(-50%) scale(1);}
.footer-contact li{font-size:14px;line-height:1.9;color:rgba(255,255,255,.62);}
.footer-contact strong{color:#fff;font-weight:600;}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:48px;padding:24px 0;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(255,255,255,.45);}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .main-nav{display:none;}
  .hamburger{display:inline-flex;}
  .mega-wrap{display:none;}
  .section{padding:64px 0;}
  .hero{padding:48px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-visual{aspect-ratio:16/10;}
  .product-grid{grid-template-columns:repeat(2,1fr);}
  .post-grid{grid-template-columns:repeat(2,1fr);}
  .review-grid{grid-template-columns:repeat(2,1fr);}
  .guarantee{grid-template-columns:repeat(2,1fr);row-gap:28px;}
  .g-item:nth-child(3){border-left:0;padding-left:0;}
  .cta-card{flex-direction:column;align-items:flex-start;padding:36px;}
  .cta-actions{flex-wrap:wrap;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;}
  .site-footer{margin-top:64px;}
}
@media (max-width:639px){
  .container{padding:0 20px;}
  .section{padding:48px 0;}
  .hero-visual{order:-1;aspect-ratio:4/3;}
  .hero-cta .btn{flex:1 1 100%;}
  .hero-trust{gap:14px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .product-grid{grid-template-columns:1fr;}
  .post-grid{grid-template-columns:1fr;}
  .review-grid{grid-template-columns:1fr;}
  .guarantee{grid-template-columns:1fr;padding:28px;row-gap:24px;}
  .g-item{padding:0;border-left:0;border-top:1px solid rgba(255,255,255,.12);padding-top:20px;}
  .g-item:first-child{border-top:0;padding-top:0;}
  .cta-card{padding:28px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: article */
:root{
  --ink:#17191C;
  --ink-soft:#2A2D31;
  --orange:#F0512B;
  --orange-deep:#C93E1C;
  --orange-soft:#FDECE6;
  --graphite:#3A3E44;
  --muted:#6B7076;
  --paper:#F6F4F0;
  --card:#FFFFFF;
  --line:#E5E1D9;
  --line-strong:#D8D3C9;
  --green:#1E9E6A;
  --img-bg:#EFECE6;
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:12px;
  --shadow-1:0 1px 2px rgba(23,25,28,.05);
  --shadow-2:0 12px 28px -14px rgba(23,25,28,.28);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--graphite);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;color:inherit;border:0;background:none;cursor:pointer}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
::selection{background:var(--orange-soft);color:var(--orange-deep)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.container-narrow{width:100%;max-width:780px;margin:0 auto;padding:0 24px}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,240,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.logo{display:inline-flex;align-items:baseline;gap:1px;font-size:22px;line-height:1;color:var(--ink);letter-spacing:-.01em}
.logo b{font-weight:800;letter-spacing:.02em}
.logo em{font-style:normal;font-weight:400;color:var(--graphite)}
.logo:hover em{color:var(--orange-deep)}
.main-nav{display:flex;align-items:center;gap:32px}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;font-weight:500;color:var(--graphite);
  transition:color .16s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--orange);transform:scaleX(0);transform-origin:center;
  transition:transform .18s ease;
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--orange-deep)}

.header-actions{display:flex;align-items:center;gap:12px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:12px;color:var(--graphite);
  transition:background .16s ease,color .16s ease;
}
.icon-btn:hover{background:#fff;color:var(--ink);box-shadow:var(--shadow-1)}
.icon-btn svg{width:18px;height:18px}

.nav-mega{position:relative}
.mega-trigger{
  display:inline-flex;align-items:center;gap:6px;height:38px;padding:0 14px;
  border:1px solid var(--line);border-radius:12px;background:#fff;
  font-size:14px;font-weight:500;color:var(--ink);
  transition:border-color .16s ease,box-shadow .16s ease;
}
.mega-trigger:hover{border-color:var(--ink);box-shadow:var(--shadow-1)}
.mega-trigger .chev{width:12px;height:12px;transition:transform .18s ease}
.nav-mega:hover .chev,.nav-mega:focus-within .chev{transform:rotate(180deg)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);
  width:760px;max-width:calc(100vw - 48px);
  display:grid;grid-template-columns:1.15fr .85fr;gap:22px;
  padding:22px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-2);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
  z-index:70;
}
.nav-mega:hover .mega-panel,.nav-mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-list{display:flex;flex-direction:column;gap:4px}
.mega-item{display:block;padding:10px 12px;border-radius:12px;transition:background .16s ease}
.mega-item:hover,.mega-item:focus-visible{background:#FAF8F4}
.mega-item strong{display:block;font-size:15px;font-weight:600;color:var(--ink);line-height:1.5}
.mega-item span{display:block;font-size:13px;color:var(--muted);line-height:1.6;margin-top:2px}
.mega-side{display:flex;flex-direction:column;gap:12px}
.mega-card{
  display:flex;align-items:center;gap:12px;padding:10px;
  border:1px solid var(--line);border-radius:14px;transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease;
}
.mega-card:hover{border-color:rgba(240,81,43,.45);box-shadow:var(--shadow-2);transform:translateY(-2px)}
.mega-thumb{width:72px;height:54px;flex:0 0 72px;border-radius:10px;overflow:hidden;background:var(--img-bg)}
.mega-thumb img{width:100%;height:100%;object-fit:cover}
.mega-card b{display:block;font-size:14px;font-weight:600;color:var(--ink)}
.mega-card small{display:block;font-size:12px;color:var(--muted);margin-top:2px}

.burger{
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  width:40px;height:38px;border:1px solid var(--line);border-radius:12px;background:#fff;
}
.burger span{display:block;width:16px;height:2px;border-radius:2px;background:var(--ink)}

.menu-toggle{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.drawer-mask{
  position:fixed;inset:0;background:rgba(23,25,28,.42);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:80;
}
.drawer{
  position:fixed;top:0;right:0;width:84vw;max-width:360px;height:100dvh;
  background:#fff;padding:20px;overflow-y:auto;z-index:90;
  transform:translateX(100%);transition:transform .28s ease;
  box-shadow:-12px 0 36px -22px rgba(23,25,28,.5);
}
#menuToggle:checked ~ .drawer{transform:translateX(0)}
#menuToggle:checked ~ .drawer-mask{opacity:1;visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-brand{display:inline-flex;align-items:baseline;font-size:20px;color:var(--ink)}
.drawer-brand b{font-weight:800}
.drawer-brand em{font-style:normal;font-weight:400;color:var(--graphite)}
.drawer-close{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;font-size:15px;color:var(--graphite);
}
.drawer-group-title{font-size:12px;letter-spacing:.08em;color:var(--muted);margin:18px 0 8px}
.drawer-link{
  display:block;padding:12px 12px;border-radius:10px;font-size:15px;font-weight:500;color:var(--ink);
  border-bottom:1px solid var(--line);transition:color .16s ease,background .16s ease;
}
.drawer-link:hover{background:#FAF8F4;color:var(--orange-deep)}
.drawer-link.is-active{border-left:3px solid var(--orange);padding-left:12px;color:var(--orange-deep)}
.drawer-sub{display:block;padding:10px 12px;font-size:14px;color:var(--muted);border-radius:10px}
.drawer-sub:hover{color:var(--ink);background:#FAF8F4}
.drawer-cta{margin-top:22px;width:100%}

/* ============ breadcrumb ============ */
.breadcrumb-wrap{padding-top:24px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.breadcrumb a{color:var(--muted);transition:color .16s ease}
.breadcrumb a:hover{color:var(--orange-deep)}
.breadcrumb .sep{color:#C9C4BA}
.breadcrumb .current{
  color:var(--ink);max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ============ buttons / badges ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform .16s ease,background .16s ease,border-color .16s ease,color .16s ease,box-shadow .16s ease;
}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-deep);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border:1px solid var(--line-strong);color:var(--ink)}
.btn-ghost:hover{background:#fff;border-color:var(--ink)}
.btn:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--orange-soft);color:var(--orange-deep);
  font-size:13px;font-weight:600;line-height:1;white-space:nowrap;
}
.badge-gray{background:#F1EEE8;color:var(--ink)}

/* ============ article head ============ */
.article-head{padding-top:28px}
.article-title{
  font-size:clamp(26px,3.6vw,38px);font-weight:800;line-height:1.3;
  letter-spacing:-.01em;color:var(--ink);margin-top:14px;
  overflow-wrap:break-word;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;font-size:13px;color:var(--muted)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C9C4BA}
.article-rule{height:1px;background:var(--line);margin-top:30px}
.article-cover{
  margin-top:30px;border-radius:var(--radius-md);overflow:hidden;
  background:var(--img-bg);aspect-ratio:16/9;
}
.article-cover img{width:100%;height:100%;object-fit:cover}

/* ============ article body ============ */
.article-body{
  font-size:16px;line-height:1.9;color:var(--graphite);
  padding-top:34px;overflow-wrap:break-word;
}
.article-body p{margin:0 0 20px}
.article-body h2{
  position:relative;font-size:23px;font-weight:700;line-height:1.45;color:var(--ink);
  margin:40px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;width:4px;height:18px;border-radius:2px;background:var(--orange);
}
.article-body h3{font-size:18px;font-weight:600;line-height:1.55;color:var(--ink);margin:28px 0 12px}
.article-body h4{font-size:16px;font-weight:600;color:var(--ink);margin:22px 0 10px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:20px;line-height:1.85}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:8px}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:#FBF9F6;
  border-left:3px solid var(--orange);border-radius:0 12px 12px 0;
  font-size:15px;color:var(--graphite);
}
.article-body img{max-width:100%;height:auto;border-radius:var(--radius-md);margin:24px auto}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;font-size:14px;margin:24px 0}
.article-body th{background:var(--paper);text-align:left;font-weight:600;color:var(--ink)}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px}
.article-body a{color:var(--orange-deep);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--ink)}
.article-body pre{
  margin:22px 0;padding:16px;background:#1B1D20;color:#EDEAE4;
  border-radius:var(--radius-sm);font-size:14px;line-height:1.7;overflow-x:auto;
}
.article-body code{font-size:14px;background:#F1EEE8;padding:2px 6px;border-radius:6px;color:var(--ink)}
.article-body pre code{background:none;padding:0;color:inherit}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

.empty-state{
  padding:40px 28px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-lg);text-align:center;box-shadow:var(--shadow-1);
}
.empty-state h2{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:10px}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:20px}

.article-foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  margin-top:44px;padding-top:26px;border-top:1px solid var(--line);
}

/* ============ related ============ */
.section{padding:64px 0}
.related-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:28px}
.section-title{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.3;color:var(--ink);letter-spacing:-.01em}
.section-sub{font-size:14px;color:var(--muted);margin-top:8px}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink);transition:color .16s ease}
.text-link:hover{color:var(--orange-deep)}
.text-link svg{width:14px;height:14px}

.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.post-card:hover{transform:translateY(-3px);border-color:rgba(240,81,43,.45);box-shadow:var(--shadow-2)}
.post-thumb{aspect-ratio:16/9;background:var(--img-bg);overflow:hidden}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.post-card:hover .post-thumb img{transform:scale(1.02)}
.post-body{padding:16px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-title{
  font-size:16px;font-weight:600;line-height:1.55;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card:hover .post-title{color:var(--orange-deep)}
.post-date{margin-top:auto;font-size:13px;color:var(--muted)}

/* ============ cta ============ */
.cta-card{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  background:var(--orange-soft);border-radius:20px;padding:36px;
}
.cta-copy h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.35;color:var(--ink)}
.cta-copy p{margin-top:10px;font-size:15px;color:#7A4A3B;max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.cta-link{font-size:14px;font-weight:600;color:var(--ink);text-decoration:underline;text-underline-offset:4px;transition:color .16s ease}
.cta-link:hover{color:var(--orange-deep)}

/* ============ footer ============ */
.site-footer{
  background:var(--ink);color:rgba(255,255,255,.62);
  margin-top:72px;padding:64px 0 28px;font-size:14px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:inline-flex;align-items:baseline;font-size:22px;line-height:1;color:#fff}
.footer-brand b{font-weight:800;letter-spacing:.02em}
.footer-brand em{font-style:normal;font-weight:400;color:rgba(255,255,255,.72)}
.footer-desc{margin-top:14px;line-height:1.8;max-width:280px;color:rgba(255,255,255,.62)}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.92);margin-bottom:16px}
.footer-links li+li{margin-top:10px}
.footer-links a{
  position:relative;display:inline-block;padding-left:0;
  color:rgba(255,255,255,.62);transition:color .16s ease,padding-left .16s ease;
}
.footer-links a::before{
  content:"";position:absolute;left:0;top:50%;width:4px;height:4px;border-radius:50%;
  background:var(--orange);transform:translateY(-50%) scale(0);transition:transform .16s ease;
}
.footer-links a:hover{color:#fff;padding-left:14px}
.footer-links a:hover::before{transform:translateY(-50%) scale(1)}
.footer-contact li{margin-bottom:10px;line-height:1.7;color:rgba(255,255,255,.62)}
.footer-contact strong{display:block;font-weight:600;color:rgba(255,255,255,.9)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ responsive ============ */
@media (max-width:1023px){
  .main-nav{display:none}
  .nav-mega{display:none}
  .burger{display:flex}
  .header-inner{height:64px}
  .section{padding:56px 0}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .breadcrumb .current{max-width:60vw}
}
@media (max-width:640px){
  .container,.container-narrow{padding:0 20px}
  .section{padding:48px 0}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .site-footer{padding:48px 0 24px;margin-top:56px}
  .cta-card{flex-direction:column;align-items:flex-start;padding:26px;gap:18px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .article-foot{flex-direction:column;align-items:stretch}
  .article-foot .btn{width:100%}
  .article-body{font-size:15.5px}
  .article-body h2{font-size:21px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .breadcrumb .current{max-width:70vw}
}

/* roulang page: category1 */
:root{
    --ink:#17191C;
    --ink-2:#3A3E44;
    --muted:#6B7076;
    --paper:#F6F4F0;
    --card:#FFFFFF;
    --line:#E5E1D9;
    --orange:#F0512B;
    --orange-dark:#C93E1C;
    --orange-soft:#FDECE6;
    --green:#1E9E6A;
    --r-lg:18px;
    --r-md:14px;
    --r-sm:12px;
    --r-xs:10px;
    --shadow-1:0 1px 2px rgba(23,25,28,.05);
    --shadow-2:0 12px 28px -14px rgba(23,25,28,.28);
    --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  html,body{overflow-x:hidden}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink-2);
    font-family:var(--font);
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;cursor:pointer;border:none;background:none}
  h1,h2,h3,h4,h5,p,ul,ol,figure{margin:0}
  ul,ol{padding:0;list-style:none}
  input,select,textarea{font:inherit}
  ::selection{background:var(--orange-soft);color:var(--orange-dark)}

  .container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(246,244,240,.92);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{display:flex;align-items:center;gap:32px;height:72px}
  .logo{display:inline-flex;align-items:baseline;gap:1px;font-size:22px;line-height:1;letter-spacing:-.02em;color:var(--ink);flex:none}
  .logo b{font-weight:800}
  .logo em{font-style:normal;font-weight:400;color:var(--ink-2);font-size:19px}

  .main-nav{display:flex;align-items:center;gap:32px;margin-right:auto}
  .nav-link{
    position:relative;display:inline-block;padding:6px 0;
    font-size:15px;font-weight:500;color:var(--ink-2);
    transition:color .16s ease;white-space:nowrap;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;right:50%;bottom:-1px;height:2px;border-radius:2px;
    background:var(--orange);transition:left .16s ease,right .16s ease;
  }
  .nav-link:hover{color:var(--ink)}
  .nav-link:hover::after,.nav-link:focus-visible::after{left:0;right:0}
  .nav-link.is-active{color:var(--ink);font-weight:600}
  .nav-link.is-active::after{left:0;right:0}

  .header-actions{display:flex;align-items:center;gap:10px;flex:none}
  .icon-btn{
    width:38px;height:38px;display:grid;place-items:center;
    border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink);
    transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease;
  }
  .icon-btn:hover{border-color:var(--ink);box-shadow:var(--shadow-1)}
  .icon-btn:active{transform:translateY(1px)}
  .icon-btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px}

  .mega-wrap{position:relative}
  .mega-btn{
    display:inline-flex;align-items:center;gap:6px;height:38px;padding:0 16px;
    border-radius:var(--r-sm);border:1px solid var(--line);background:#fff;
    font-size:14px;font-weight:500;color:var(--ink);
    transition:border-color .16s ease,box-shadow .16s ease,background .16s ease;
  }
  .mega-btn:hover{border-color:var(--ink);box-shadow:var(--shadow-1)}
  .mega-btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
  .mega-btn svg{transition:transform .16s ease}
  .mega-wrap:hover .mega-btn svg,.mega-wrap:focus-within .mega-btn svg{transform:rotate(180deg)}

  .mega-panel{
    position:absolute;right:0;top:calc(100% + 14px);width:720px;max-width:calc(100vw - 48px);
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:0 24px 48px -24px rgba(23,25,28,.35);
    padding:20px;display:grid;grid-template-columns:1.15fr 1fr;gap:18px;
    opacity:0;visibility:hidden;transform:translateY(-6px);
    transition:opacity .18s ease,transform .18s ease,visibility .18s;
  }
  .mega-wrap:hover .mega-panel,.mega-wrap:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
  .mega-list{display:flex;flex-direction:column;gap:2px}
  .mega-list a{display:block;padding:10px 12px;border-radius:var(--r-sm);transition:background .16s ease}
  .mega-list a:hover,.mega-list a:focus-visible{background:var(--paper)}
  .mega-list .t{display:block;font-size:15px;font-weight:600;color:var(--ink)}
  .mega-list .d{display:block;font-size:13px;line-height:1.6;color:var(--muted);margin-top:2px}
  .mega-cards{display:grid;gap:12px;align-content:start}
  .mega-card{
    display:flex;align-items:center;gap:12px;padding:10px;
    border:1px solid var(--line);border-radius:var(--r-md);
    transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease;
  }
  .mega-card:hover{border-color:rgba(240,81,43,.45);box-shadow:var(--shadow-2);transform:translateY(-2px)}
  .mega-card img{width:64px;height:48px;object-fit:cover;border-radius:var(--r-xs);background:#EFECE6;flex:none}
  .mega-card .ct{font-size:14px;font-weight:600;color:var(--ink);line-height:1.4}
  .mega-card .cd{font-size:12px;color:var(--muted);line-height:1.5;margin-top:2px}

  .nav-toggle-input{position:absolute;width:0;height:0;opacity:0;pointer-events:none}
  .menu-toggle{
    display:none;width:38px;height:38px;align-items:center;justify-content:center;
    border-radius:var(--r-sm);border:1px solid var(--line);background:#fff;color:var(--ink);
  }
  .menu-toggle:focus-visible{outline:2px solid var(--ink);outline-offset:2px}

  .drawer-mask{
    position:fixed;inset:0;background:rgba(23,25,28,.42);
    opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:70;
  }
  .mobile-drawer{
    position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;z-index:80;
    background:#fff;border-left:1px solid var(--line);
    padding:20px;overflow-y:auto;
    transform:translateX(105%);visibility:hidden;
    transition:transform .22s ease,visibility .22s ease;
    display:flex;flex-direction:column;gap:18px;
  }
  .nav-toggle-input:checked ~ .drawer-mask{opacity:1;pointer-events:auto}
  .nav-toggle-input:checked ~ .mobile-drawer{transform:translateX(0);visibility:visible}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line)}
  .drawer-close{
    width:34px;height:34px;display:grid;place-items:center;border-radius:var(--r-xs);
    border:1px solid var(--line);background:#fff;cursor:pointer;color:var(--ink-2);
  }
  .drawer-nav{display:flex;flex-direction:column;gap:4px}
  .drawer-link{
    display:block;padding:12px 14px;border-radius:var(--r-sm);
    font-size:16px;font-weight:500;color:var(--ink);
    border-left:3px solid transparent;transition:background .16s ease,color .16s ease;
  }
  .drawer-link:hover{background:var(--paper)}
  .drawer-link.is-active{color:var(--orange-dark);background:var(--orange-soft);border-left-color:var(--orange);padding-left:11px}
  .drawer-cta{margin-top:auto}

  /* ---------- breadcrumb ---------- */
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:24px 0 0;font-size:13px;color:var(--muted)}
  .breadcrumb a{transition:color .16s ease}
  .breadcrumb a:hover{color:var(--ink)}
  .breadcrumb .sep{color:#C7C2B8}
  .breadcrumb .current{color:var(--ink);font-weight:500}

  /* ---------- page hero ---------- */
  .cat-hero{display:grid;grid-template-columns:1.12fr .88fr;gap:56px;align-items:center;padding:32px 0 44px}
  .badge{
    display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;
    border-radius:999px;background:var(--orange-soft);color:var(--orange-dark);
    font-size:13px;font-weight:600;line-height:1;white-space:nowrap;
  }
  .badge-neutral{background:#F1EFEA;color:var(--ink-2)}
  .badge-green{background:rgba(30,158,106,.1);color:var(--green)}
  .hero-title{
    margin-top:16px;
    font-size:clamp(30px,4.2vw,52px);
    font-weight:800;line-height:1.15;letter-spacing:-.01em;color:var(--ink);
  }
  .hero-lead{margin-top:16px;font-size:16px;line-height:1.8;color:var(--muted);max-width:540px}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
  .hero-media{
    position:relative;border-radius:var(--r-lg);overflow:hidden;
    border:1px solid var(--line);background:#EFECE6;box-shadow:var(--shadow-1);
  }
  .hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
  .media-tag{
    position:absolute;left:14px;top:14px;background:#fff;border:1px solid var(--line);
    border-radius:999px;padding:5px 12px;font-size:13px;font-weight:600;color:var(--ink);
  }
  .section-divider{height:1px;background:var(--line)}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 24px;border-radius:var(--r-sm);
    font-size:15px;font-weight:600;white-space:nowrap;border:1px solid transparent;
    transition:background .16s ease,color .16s ease,border-color .16s ease,transform .16s ease,box-shadow .16s ease;
  }
  .btn-primary{background:var(--orange);color:#fff}
  .btn-primary:hover{background:var(--orange-dark);transform:translateY(-1px)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{background:transparent;border-color:#D8D3C9;color:var(--ink)}
  .btn-ghost:hover{border-color:var(--ink);background:#fff}
  .btn:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
  .link-arrow{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink);
    transition:color .16s ease;
  }
  .link-arrow:hover{color:var(--orange-dark);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}

  /* ---------- catalog layout ---------- */
  .catalog-section{padding:56px 0 0}
  .catalog-layout{display:grid;grid-template-columns:216px minmax(0,1fr);gap:44px}
  .anchor-nav{position:sticky;top:96px;align-self:start}
  .anchor-title{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--muted);margin-bottom:12px}
  .anchor-list{display:flex;flex-direction:column;gap:2px}
  .anchor-list a{
    display:block;padding:9px 12px 9px 14px;border-left:2px solid transparent;
    border-radius:0 8px 8px 0;font-size:15px;color:var(--ink-2);
    transition:background .16s ease,color .16s ease,border-color .16s ease;
  }
  .anchor-list a:hover{background:#fff;color:var(--ink)}
  .anchor-list a.is-current{border-left-color:var(--orange);background:#fff;color:var(--ink);font-weight:600}
  .anchor-note{
    margin-top:20px;padding:16px;border:1px solid var(--line);border-radius:var(--r-md);
    background:#fff;font-size:13px;line-height:1.75;color:var(--muted);
  }
  .anchor-note strong{display:block;color:var(--ink);font-size:14px;margin-bottom:4px}

  .grid-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:24px}
  .grid-title{font-size:clamp(22px,2.6vw,32px);font-weight:700;color:var(--ink);line-height:1.3}
  .grid-sub{font-size:14px;color:var(--muted);margin-top:6px}

  .model-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .model-card{
    display:flex;flex-direction:column;background:var(--card);
    border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
    box-shadow:var(--shadow-1);
    transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  }
  .model-card:hover{transform:translateY(-3px);border-color:rgba(240,81,43,.45);box-shadow:var(--shadow-2)}
  .model-card:focus-within{border-color:rgba(240,81,43,.45);box-shadow:var(--shadow-2)}
  .model-thumb{position:relative;background:#EFECE6}
  .model-thumb img{width:100%;aspect-ratio:4/3;object-fit:cover}
  .model-thumb .badge{position:absolute;left:12px;top:12px}
  .model-body{padding:16px;display:flex;flex-direction:column;gap:8px;flex:1}
  .model-name{font-size:18px;font-weight:700;color:var(--ink);line-height:1.4}
  .model-desc{font-size:14px;line-height:1.7;color:var(--muted)}
  .model-foot{
    margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
    display:flex;align-items:center;justify-content:space-between;gap:12px;
  }
  .price{font-size:20px;font-weight:800;color:var(--orange-dark);font-variant-numeric:tabular-nums;line-height:1.2}
  .price small{font-size:12px;font-weight:500;color:var(--muted);margin-left:2px}

  /* ---------- stat band ---------- */
  .stat-band{
    margin-top:72px;background:var(--ink);border-radius:var(--r-lg);
    padding:32px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;
  }
  .stat-item{min-width:0}
  .stat-item + .stat-item{border-left:1px solid rgba(255,255,255,.12);padding-left:24px}
  .stat-num{font-size:28px;font-weight:800;color:#fff;line-height:1.2;font-variant-numeric:tabular-nums}
  .stat-num span{font-size:15px;font-weight:600;margin-left:2px}
  .stat-label{margin-top:6px;font-size:13px;line-height:1.6;color:rgba(255,255,255,.62)}

  /* ---------- cta ---------- */
  .cta-wrap{padding:72px 0 0}
  .cta-card{
    background:var(--orange-soft);border-radius:20px;padding:40px;
    display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  }
  .cta-title{font-size:clamp(20px,2.4vw,28px);font-weight:700;color:var(--ink);line-height:1.35}
  .cta-text{margin-top:8px;font-size:15px;color:#7A5B4E;line-height:1.7;max-width:520px}
  .cta-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}

  /* ---------- footer ---------- */
  .site-footer{background:var(--ink);color:rgba(255,255,255,.62);margin-top:96px;padding:64px 0 0}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
  .footer-brand{display:inline-flex;align-items:baseline;gap:1px;font-size:20px;line-height:1;color:#fff}
  .footer-brand b{font-weight:800}
  .footer-brand em{font-style:normal;font-weight:400;color:rgba(255,255,255,.7);font-size:17px}
  .footer-desc{margin-top:14px;font-size:13px;line-height:1.85;color:rgba(255,255,255,.55);max-width:280px}
  .footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.85);margin-bottom:14px}
  .footer-links li,.footer-contact li{font-size:14px;line-height:1.9;margin-bottom:4px}
  .footer-links a{position:relative;display:inline-block;color:rgba(255,255,255,.62);transition:color .16s ease}
  .footer-links a::before{
    content:"";position:absolute;left:-12px;top:50%;width:4px;height:4px;border-radius:50%;
    background:var(--orange);opacity:0;transform:translateY(-50%);transition:opacity .16s ease;
  }
  .footer-links a:hover{color:#fff}
  .footer-links a:hover::before{opacity:1}
  .footer-contact strong{display:inline-block;min-width:60px;color:rgba(255,255,255,.82);font-weight:600}
  .footer-bottom{
    margin-top:44px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);
    display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
    font-size:13px;color:rgba(255,255,255,.5);
  }

  /* ---------- responsive ---------- */
  @media (max-width:1023px){
    .main-nav,.mega-wrap{display:none}
    .menu-toggle{display:inline-flex}
    .header-inner{gap:16px}
    .logo{margin-right:auto}
    .cat-hero{grid-template-columns:1fr;gap:32px;padding:24px 0 36px}
    .hero-media{order:-1}
    .hero-media img{aspect-ratio:16/10}
    .catalog-layout{grid-template-columns:1fr;gap:28px}
    .anchor-nav{position:static}
    .anchor-list{flex-direction:row;flex-wrap:wrap;gap:8px}
    .anchor-list a{
      border-left:none;border:1px solid var(--line);border-radius:999px;
      padding:7px 14px;background:#fff;font-size:14px;white-space:nowrap;
    }
    .anchor-list a.is-current{border-color:var(--orange);background:var(--orange-soft);color:var(--orange-dark)}
    .anchor-note{display:none}
    .stat-band{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;padding:28px;margin-top:56px}
    .stat-item + .stat-item{border-left:none;padding-left:0}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .cta-wrap{padding:56px 0 0}
  }
  @media (max-width:767px){
    .model-grid{grid-template-columns:1fr}
    .grid-head{align-items:flex-start}
  }
  @media (max-width:639px){
    .container{padding:0 20px}
    .stat-band{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
    .cta-card{padding:28px;flex-direction:column;align-items:flex-start;gap:20px}
    .cta-actions{width:100%}
    .cta-actions .btn{width:100%}
    .hero-actions .btn{width:100%}
    .site-footer{padding-top:48px;margin-top:64px}
    .footer-bottom{flex-direction:column;align-items:flex-start}
  }

/* roulang page: category3 */
:root{
  --ink:#17191C;
  --ink-soft:#3A3E44;
  --muted:#6B7076;
  --paper:#F6F4F0;
  --card:#FFFFFF;
  --line:#E5E1D9;
  --line-strong:#D8D3C9;
  --accent:#F0512B;
  --accent-deep:#C93E1C;
  --accent-soft:#FDECE6;
  --green:#1E9E6A;
  --img-bg:#EFECE6;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --r-xs:10px;
  --shadow-card:0 1px 2px rgba(23,25,28,.05);
  --shadow-hover:0 12px 28px -14px rgba(23,25,28,.28);
  --t:170ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-soft);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:700;line-height:1.3;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--t),border-color var(--t),background-color var(--t);}
img{max-width:100%;display:block;background:var(--img-bg);}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
@media(max-width:640px){.container{padding:0 20px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,240,.92);
  backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:24px;height:72px;}
.brand{display:flex;align-items:baseline;gap:2px;font-size:21px;letter-spacing:.01em;flex-shrink:0;}
.brand b{font-weight:800;color:var(--ink);}
.brand em{font-style:normal;font-weight:400;color:var(--ink-soft);font-size:19px;}
.brand:hover b{color:var(--accent);}
.main-nav{display:flex;align-items:center;gap:32px;flex:1;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-soft);
  padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;
  background:var(--accent);transition:left var(--t),right var(--t);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after,.nav-link.is-active::after{left:0;right:0;}
.nav-link.is-active{color:var(--accent);font-weight:600;}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto;}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-xs);border:1px solid var(--line);background:#fff;color:var(--ink);
  transition:border-color var(--t),color var(--t),transform var(--t);
}
.icon-btn:hover{border-color:var(--ink);color:var(--accent);}
.icon-btn svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.mega-wrap{position:relative;}
.mega-trigger{
  display:inline-flex;align-items:center;gap:6px;height:38px;padding:0 14px;
  border-radius:var(--r-xs);border:1px solid var(--line-strong);background:#fff;
  font-size:14px;font-weight:500;color:var(--ink);transition:border-color var(--t),background-color var(--t);
}
.mega-trigger:hover{border-color:var(--ink);background:#fff;}
.mega-trigger svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;transition:transform var(--t);}
.mega-wrap:hover .mega-trigger svg{transform:rotate(180deg);}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 12px);width:700px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:0 20px 44px -22px rgba(23,25,28,.34);
  padding:22px;display:grid;grid-template-columns:1.15fr .85fr;gap:22px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity var(--t),transform var(--t),visibility var(--t);
}
.mega-wrap:hover .mega-panel,.mega-wrap:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-col-title{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin-bottom:10px;}
.mega-list li + li{margin-top:4px;}
.mega-list a{display:block;padding:9px 10px;border-radius:var(--r-xs);border-left:2px solid transparent;transition:background-color var(--t),border-color var(--t);}
.mega-list a strong{display:block;font-size:14px;font-weight:600;color:var(--ink);}
.mega-list a span{display:block;font-size:12px;color:var(--muted);line-height:1.6;}
.mega-list a:hover{background:var(--accent-soft);border-left-color:var(--accent);}
.mega-list a:hover strong{color:var(--accent-deep);}
.mega-cards{display:grid;gap:12px;}
.mega-card{
  display:flex;gap:10px;align-items:center;padding:10px;border:1px solid var(--line);
  border-radius:var(--r-md);transition:border-color var(--t),box-shadow var(--t),transform var(--t);
}
.mega-card:hover{border-color:rgba(240,81,43,.45);box-shadow:var(--shadow-hover);transform:translateY(-2px);}
.mega-card img{width:56px;height:44px;object-fit:cover;border-radius:8px;}
.mega-card b{display:block;font-size:13px;font-weight:600;color:var(--ink);}
.mega-card small{display:block;font-size:11.5px;color:var(--muted);}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-xs);background:#fff;align-items:center;justify-content:center;}
.burger svg{width:20px;height:20px;stroke:var(--ink);fill:none;stroke-width:1.8;stroke-linecap:round;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;background:#fff;z-index:120;
  border-left:1px solid var(--line);padding:20px;overflow-y:auto;
  transform:translateX(102%);transition:transform 220ms ease;
  display:flex;flex-direction:column;gap:18px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{width:34px;height:34px;border:1px solid var(--line);border-radius:8px;display:inline-flex;align-items:center;justify-content:center;font-size:18px;color:var(--ink);}
.drawer-nav a{display:block;padding:10px 12px;font-size:15px;color:var(--ink-soft);border-left:2px solid transparent;border-radius:8px;}
.drawer-nav a.is-active{color:var(--accent);border-left-color:var(--accent);background:var(--accent-soft);font-weight:600;}
.drawer-sub-title{font-size:12px;color:var(--muted);letter-spacing:.06em;margin:6px 0 4px;font-weight:600;}
.drawer-cta{display:block;text-align:center;margin-top:auto;}
.scrim{position:fixed;inset:0;background:rgba(23,25,28,.42);z-index:110;opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);}
.scrim.is-open{opacity:1;visibility:visible;}
@media(max-width:1023px){
  .main-nav,.header-tools .mega-wrap,.header-tools .icon-btn.search{display:none;}
  .burger{display:inline-flex;}
}
@media(min-width:1024px){.drawer,.scrim{display:none;}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background-color var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line-strong);}
.btn-ghost:hover{border-color:var(--ink);background:#fff;transform:translateY(-1px);}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink);border-bottom:1px solid transparent;padding-bottom:1px;}
.btn-text:hover{color:var(--accent);border-bottom:2px solid var(--accent);}
.btn-text svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2;}

/* ---------- page head ---------- */
.crumb{padding:22px 0 0;font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.crumb a:hover{color:var(--accent);}
.crumb .sep{color:#C6C1B8;}
.crumb .current{color:var(--ink);font-weight:500;}

.page-head{padding:26px 0 40px;border-bottom:1px solid var(--line);}
.page-head-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:44px;align-items:center;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-deep);
  font-size:13px;font-weight:600;letter-spacing:.01em;
}
.badge-neutral{background:#EFEDE8;color:var(--ink);}
.page-head h1{
  font-size:clamp(28px,3.6vw,44px);font-weight:800;line-height:1.18;letter-spacing:-.01em;
  margin:16px 0 14px;
}
.page-head .lead{font-size:16px;color:var(--ink-soft);max-width:560px;}
.head-img{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-card);aspect-ratio:16/11;position:relative;
}
.head-img img{width:100%;height:100%;object-fit:cover;}
.head-tag{
  position:absolute;left:14px;bottom:14px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-xs);padding:8px 12px;font-size:12.5px;color:var(--ink);font-weight:600;
}

/* ---------- sections ---------- */
.section{padding:76px 0;}
.section-sm{padding:56px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;letter-spacing:-.01em;}
.section-head p{margin-top:8px;font-size:15px;color:var(--muted);max-width:640px;}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--accent);text-transform:uppercase;margin-bottom:8px;}

/* ---------- scene cards (alternating) ---------- */
.scene-stack{display:grid;gap:24px;}
.scene-card{
  display:grid;grid-template-columns:1fr 1fr;gap:0;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--shadow-card);transition:box-shadow var(--t),border-color var(--t),transform var(--t);
}
.scene-card:hover{box-shadow:var(--shadow-hover);border-color:rgba(240,81,43,.4);transform:translateY(-3px);}
.scene-card .scene-media{aspect-ratio:16/10;background:var(--img-bg);overflow:hidden;}
.scene-card .scene-media img{width:100%;height:100%;object-fit:cover;}
.scene-body{padding:32px;display:flex;flex-direction:column;justify-content:center;gap:14px;}
.scene-body h3{font-size:20px;font-weight:700;}
.scene-body p{font-size:15px;color:var(--ink-soft);}
.scene-meta{display:flex;flex-wrap:wrap;gap:8px;}
.chip{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;
  border:1px solid var(--line);background:#FBFAF8;font-size:12.5px;color:var(--ink-soft);font-weight:500;
}
.scene-card.flip .scene-media{order:2;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:8px;}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 24px;
  box-shadow:var(--shadow-card);transition:box-shadow var(--t),transform var(--t),border-color var(--t);
}
.step:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:rgba(240,81,43,.4);}
.step-num{font-size:13px;font-weight:800;color:var(--accent);letter-spacing:.1em;font-variant-numeric:tabular-nums;}
.step h3{font-size:17px;font-weight:600;margin:10px 0 8px;}
.step p{font-size:14px;color:var(--ink-soft);}

/* ---------- compare / spec list ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;
  box-shadow:var(--shadow-card);
}
.panel h3{font-size:18px;font-weight:600;margin-bottom:14px;}
.spec-row{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;}
.spec-row:last-child{border-bottom:0;}
.spec-row dt{color:var(--muted);}
.spec-row dd{margin:0;color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums;}

/* ---------- dark band ---------- */
.dark-band{background:var(--ink);border-radius:20px;padding:38px 34px;color:#fff;}
.dark-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);}
.dark-band p{color:rgba(255,255,255,.68);font-size:15px;margin-top:10px;max-width:680px;}
.dark-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:28px;}
.dark-facts div{padding:0 20px;border-left:1px solid rgba(255,255,255,.14);}
.dark-facts div:first-child{padding-left:0;border-left:0;}
.dark-facts strong{display:block;font-size:24px;font-weight:800;color:#fff;font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.dark-facts span{display:block;font-size:12.5px;color:rgba(255,255,255,.6);margin-top:4px;}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);}
.faq summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;
  transition:color var(--t);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--accent);}
.faq .sign{font-size:20px;font-weight:400;color:var(--accent);transition:transform var(--t);flex-shrink:0;line-height:1;}
.faq details[open] .sign{transform:rotate(45deg);}
.faq .answer{padding:0 4px 22px 20px;font-size:14.5px;line-height:1.85;color:var(--ink-soft);}

/* ---------- cta ---------- */
.cta-box{
  background:var(--accent-soft);border-radius:20px;padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-box h2{font-size:clamp(21px,2.4vw,28px);}
.cta-box p{font-size:15px;color:var(--ink-soft);margin-top:8px;max-width:520px;}
.cta-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.62);padding:64px 0 28px;margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.15fr;gap:40px;}
.footer-brand{display:inline-flex;align-items:baseline;gap:2px;font-size:20px;margin-bottom:12px;}
.footer-brand b{font-weight:800;color:#fff;}
.footer-brand em{font-style:normal;font-weight:400;color:rgba(255,255,255,.72);font-size:18px;}
.footer-desc{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.55);max-width:280px;}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.9);margin-bottom:14px;}
.footer-links li + li{margin-top:9px;}
.footer-links a{position:relative;font-size:14px;color:rgba(255,255,255,.62);padding-left:0;transition:color var(--t),padding-left var(--t);}
.footer-links a::before{
  content:"";position:absolute;left:-10px;top:50%;transform:translateY(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--accent);opacity:0;transition:opacity var(--t);
}
.footer-links a:hover{color:#fff;padding-left:10px;}
.footer-links a:hover::before{opacity:1;left:0;}
.footer-contact li{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.55);margin-bottom:8px;}
.footer-contact strong{display:inline-block;color:rgba(255,255,255,.85);font-weight:600;margin-right:8px;}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.45);
}

/* ---------- responsive ---------- */
@media(max-width:1023px){
  .page-head-grid{grid-template-columns:1fr;gap:26px;}
  .head-img{aspect-ratio:16/9;}
  .steps{grid-template-columns:1fr;}
  .dark-facts{grid-template-columns:repeat(2,1fr);gap:20px 0;}
  .dark-facts div:nth-child(3){padding-left:0;border-left:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media(max-width:860px){
  .scene-card,.scene-card.flip{grid-template-columns:1fr;}
  .scene-card.flip .scene-media{order:0;}
  .scene-body{padding:24px;}
  .split{grid-template-columns:1fr;}
}
@media(max-width:639px){
  .section{padding:48px 0;}
  .section-sm{padding:36px 0;}
  .page-head{padding:20px 0 30px;}
  .cta-box{padding:26px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .dark-band{padding:26px 20px;}
  .dark-facts{grid-template-columns:1fr;gap:14px;}
  .dark-facts div{padding:12px 0 0;border-left:0;border-top:1px solid rgba(255,255,255,.14);}
  .dark-facts div:first-child{padding-top:0;border-top:0;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:6px;}
}

/* roulang page: category2 */
:root{
    --ink:#17191C;
    --ink-2:#3A3E44;
    --muted:#6B7076;
    --orange:#F0512B;
    --orange-dark:#C93E1C;
    --orange-soft:#FDECE6;
    --paper:#F6F4F0;
    --card:#FFFFFF;
    --line:#E5E1D9;
    --line-strong:#D8D3C9;
    --green:#1E9E6A;
    --img-bg:#EFECE6;
    --r-lg:18px;
    --r-md:14px;
    --r-btn:12px;
    --r-in:10px;
    --shadow-1:0 1px 2px rgba(23,25,28,.05);
    --shadow-2:0 12px 28px -14px rgba(23,25,28,.28);
    --container:1240px;
    --ease:160ms;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink-2);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;background:var(--img-bg)}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit}
  h1,h2,h3,h4,p,dl,dd,ul{margin:0}
  ul{list-style:none;padding:0}
  :focus-visible{outline:2px solid var(--ink);outline-offset:3px}
  .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
  .section{padding:96px 0}
  .section-tight{padding:0 0 96px}
  .rule{height:1px;background:var(--line);border:0;margin:0}
  .num{font-variant-numeric:tabular-nums}

  /* ============ 顶部导航 ============ */
  .nav-toggle-input{position:absolute;width:0;height:0;opacity:0;pointer-events:none}
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(246,244,240,.94);
    -webkit-backdrop-filter:blur(10px);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{display:flex;align-items:center;gap:28px;height:72px}
  .logo{display:inline-flex;align-items:baseline;gap:1px;font-size:20px;letter-spacing:.01em;line-height:1}
  .logo b{font-weight:800;color:var(--ink)}
  .logo em{font-style:normal;font-weight:400;color:var(--ink-2)}
  .main-nav{display:flex;align-items:center;gap:32px;margin-left:6px}
  .nav-link{
    position:relative;font-size:15px;font-weight:500;color:var(--ink-2);
    padding:8px 0;transition:color var(--ease);
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;
    background:var(--orange);border-radius:2px;
    transition:left var(--ease),right var(--ease);
  }
  .nav-link:hover,.nav-link:focus-visible{color:var(--ink)}
  .nav-link:hover::after,.nav-link:focus-visible::after{left:0;right:0}
  .nav-link.is-active{color:var(--orange);font-weight:600}
  .nav-link.is-active::after{left:0;right:0}
  .header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
  .icon-btn{
    width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
    background:transparent;border:1px solid transparent;border-radius:var(--r-btn);
    color:var(--ink-2);transition:background var(--ease),border-color var(--ease),color var(--ease);
  }
  .icon-btn:hover{background:#fff;border-color:var(--line-strong);color:var(--ink)}

  .mega-wrap{position:relative}
  .mega-trigger{
    display:inline-flex;align-items:center;gap:6px;
    height:38px;padding:0 14px;background:transparent;
    border:1px solid var(--line-strong);border-radius:var(--r-btn);
    font-size:14px;font-weight:500;color:var(--ink);
    transition:border-color var(--ease),background var(--ease);
  }
  .mega-trigger:hover{border-color:var(--ink);background:#fff}
  .mega-trigger .caret{transition:transform var(--ease)}
  .mega-wrap:hover .mega-trigger .caret,
  .mega-wrap:focus-within .mega-trigger .caret{transform:rotate(180deg)}
  .mega-panel{
    position:absolute;right:0;top:calc(100% + 14px);width:700px;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:0 24px 48px -24px rgba(23,25,28,.35);
    padding:22px;opacity:0;visibility:hidden;transform:translateY(-6px);
    transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
  }
  .mega-wrap:hover .mega-panel,
  .mega-wrap:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
  .mega-cols{display:grid;grid-template-columns:1.25fr 1fr;gap:22px}
  .mega-list{display:grid;gap:4px}
  .mega-item{display:block;padding:10px 12px;border-radius:var(--r-in);transition:background var(--ease)}
  .mega-item:hover,.mega-item:focus-visible{background:var(--orange-soft)}
  .mega-title{display:block;font-size:14px;font-weight:600;color:var(--ink)}
  .mega-desc{display:block;font-size:12px;line-height:1.6;color:var(--muted);margin-top:2px}
  .mega-cards{display:grid;gap:12px;padding-left:22px;border-left:1px solid var(--line)}
  .mega-card{display:flex;align-items:center;gap:10px;padding:8px;border:1px solid var(--line);border-radius:var(--r-md);transition:border-color var(--ease),box-shadow var(--ease)}
  .mega-card:hover{border-color:rgba(240,81,43,.45);box-shadow:var(--shadow-1)}
  .mega-card img{width:56px;height:44px;object-fit:cover;border-radius:8px;flex:none}
  .mega-card span{font-size:13px;font-weight:600;color:var(--ink)}
  .mega-card i{margin-left:auto;font-style:normal;color:var(--orange);font-size:13px}

  .hamburger{
    display:none;width:40px;height:40px;align-items:center;justify-content:center;
    background:transparent;border:1px solid var(--line-strong);border-radius:var(--r-btn);cursor:pointer;
  }
  .hamburger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
  .hamburger span::before,.hamburger span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
  }
  .hamburger span::before{top:-6px}
  .hamburger span::after{top:6px}

  .mobile-drawer{
    position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:340px;z-index:90;
    background:#fff;transform:translateX(105%);
    transition:transform 240ms ease;
    padding:22px 20px 28px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
    box-shadow:-24px 0 48px -28px rgba(23,25,28,.5);
  }
  #navToggle:checked ~ .mobile-drawer{transform:translateX(0)}
  .drawer-mask{
    position:fixed;inset:0;z-index:80;background:rgba(23,25,28,.42);
    opacity:0;visibility:hidden;transition:opacity 200ms ease,visibility 200ms ease;
  }
  #navToggle:checked ~ .drawer-mask{opacity:1;visibility:visible}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
  .drawer-close{
    width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
    border:1px solid var(--line);border-radius:10px;font-size:20px;line-height:1;color:var(--ink-2);cursor:pointer;
  }
  .drawer-nav{display:flex;flex-direction:column;margin-top:8px}
  .drawer-link{
    position:relative;display:block;padding:13px 0 13px 14px;font-size:16px;
    color:var(--ink-2);border-bottom:1px solid var(--line);transition:color var(--ease);
  }
  .drawer-link:hover{color:var(--ink)}
  .drawer-link.is-active{color:var(--orange);font-weight:600}
  .drawer-link.is-active::before{
    content:"";position:absolute;left:0;top:15px;bottom:15px;width:3px;border-radius:2px;background:var(--orange);
  }
  .drawer-cta{margin-top:auto;width:100%;justify-content:center}

  /* ============ 通用按钮 / 徽章 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 24px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;border:1px solid transparent;
    transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
  }
  .btn-primary{background:var(--orange);color:#fff}
  .btn-primary:hover{background:var(--orange-dark);transform:translateY(-1px)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink)}
  .btn-ghost:hover{background:#fff;border-color:var(--ink)}
  .link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink);transition:color var(--ease)}
  .link-arrow:hover{color:var(--orange);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:2px}
  .badge{
    display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
    background:var(--orange-soft);color:var(--orange-dark);
    font-size:12px;font-weight:600;letter-spacing:.01em;
  }
  .badge-muted{background:#EFEDE8;color:var(--ink)}
  .badge-green{background:rgba(30,158,106,.1);color:var(--green)}

  /* ============ 面包屑 ============ */
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    padding-top:24px;font-size:13px;color:var(--muted);
  }
  .breadcrumb a{transition:color var(--ease)}
  .breadcrumb a:hover{color:var(--orange)}
  .breadcrumb .sep{color:#B9B4A9}
  .breadcrumb .current{color:var(--ink);font-weight:500}

  /* ============ 页头 ============ */
  .page-head{padding:36px 0 44px}
  .page-head-inner{display:grid;grid-template-columns:1fr 360px;gap:48px;align-items:center}
  .page-title{
    font-size:clamp(28px,3.6vw,44px);font-weight:800;line-height:1.18;
    letter-spacing:-.01em;color:var(--ink);margin:16px 0 14px;
  }
  .lede{font-size:16px;color:var(--ink-2);max-width:520px}
  .page-head-media{
    aspect-ratio:4/3;border-radius:var(--r-md);overflow:hidden;
    border:1px solid var(--line);background:var(--img-bg);box-shadow:var(--shadow-1);
  }
  .page-head-media img{width:100%;height:100%;object-fit:cover}

  /* ============ 单品陈列 ============ */
  .showcase{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:start}
  .stage{
    aspect-ratio:16/10;border-radius:var(--r-md);overflow:hidden;
    border:1px solid var(--line);background:var(--img-bg);box-shadow:var(--shadow-1);
  }
  .stage img{width:100%;height:100%;object-fit:cover}
  .thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}
  .thumb{
    aspect-ratio:4/3;border-radius:10px;overflow:hidden;border:1px solid var(--line);
    background:var(--img-bg);cursor:pointer;transition:border-color var(--ease),transform var(--ease);
  }
  .thumb:hover{border-color:rgba(240,81,43,.55);transform:translateY(-2px)}
  .thumb img{width:100%;height:100%;object-fit:cover}

  .spec-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:26px;box-shadow:var(--shadow-1);
  }
  .spec-card h2{font-size:26px;font-weight:800;color:var(--ink);letter-spacing:-.01em;margin-top:14px}
  .spec-sub{font-size:13px;color:var(--muted);margin-top:6px}
  .spec-list{margin-top:20px;border-top:1px solid var(--line)}
  .spec-row{
    display:flex;align-items:baseline;justify-content:space-between;gap:16px;
    padding:11px 0;border-bottom:1px solid var(--line);
  }
  .spec-row dt{font-size:13px;color:var(--muted)}
  .spec-row dd{font-size:14px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;text-align:right}
  .price-row{display:flex;align-items:baseline;gap:8px;margin-top:20px}
  .price{font-size:32px;font-weight:800;color:var(--orange);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
  .price-note{font-size:13px;color:var(--muted)}
  .btn-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}
  .spec-foot{font-size:12px;color:var(--muted);margin-top:14px;line-height:1.7}

  /* ============ 参数带 ============ */
  .metric-band{
    display:grid;grid-template-columns:repeat(4,1fr);
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
    overflow:hidden;box-shadow:var(--shadow-1);
  }
  .metric{padding:26px 24px;border-left:1px solid var(--line)}
  .metric:first-child{border-left:0}
  .metric-num{
    display:block;font-size:26px;font-weight:800;color:var(--ink);
    font-variant-numeric:tabular-nums;letter-spacing:-.01em;line-height:1.2;
  }
  .metric-label{display:block;margin-top:6px;font-size:13px;color:var(--muted)}

  /* ============ 说明文字 ============ */
  .notes{display:grid;grid-template-columns:1fr 1fr;gap:32px}
  .note-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:30px;box-shadow:var(--shadow-1);transition:box-shadow var(--ease),border-color var(--ease),transform var(--ease);
  }
  .note-card:hover{transform:translateY(-3px);border-color:rgba(240,81,43,.4);box-shadow:var(--shadow-2)}
  .note-card h3{font-size:19px;font-weight:700;color:var(--ink);margin-bottom:12px;display:flex;align-items:center;gap:10px}
  .note-card h3::before{content:"";width:4px;height:18px;border-radius:2px;background:var(--orange);flex:none}
  .note-card p{font-size:15px;line-height:1.85;color:var(--ink-2)}

  /* ============ 问答 ============ */
  .faq-layout{display:grid;grid-template-columns:340px 1fr;gap:48px;align-items:start}
  .faq-intro h2{font-size:clamp(22px,2.4vw,30px);font-weight:800;color:var(--ink);line-height:1.3;margin-top:14px}
  .faq-intro p{font-size:14px;color:var(--muted);margin-top:12px}
  .faq-list{border-top:1px solid var(--line)}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item summary{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 0;font-size:16px;font-weight:600;color:var(--ink);
    cursor:pointer;list-style:none;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary:hover{color:var(--orange)}
  .faq-sign{
    flex:none;width:24px;height:24px;display:inline-flex;align-items:center;justify-content:center;
    font-size:18px;font-weight:400;color:var(--muted);
    transition:transform var(--ease),color var(--ease);
  }
  .faq-item[open] .faq-sign{transform:rotate(45deg);color:var(--orange)}
  .faq-item[open] summary{color:var(--ink)}
  .faq-body{padding:0 0 22px 16px}
  .faq-body p{font-size:14.5px;line-height:1.85;color:var(--ink-2)}

  /* ============ CTA ============ */
  .cta-card{
    display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
    background:var(--orange-soft);border-radius:20px;padding:44px 44px;
    border:1px solid rgba(240,81,43,.14);
  }
  .cta-card h2{font-size:clamp(20px,2.3vw,28px);font-weight:800;color:var(--ink);line-height:1.3}
  .cta-card p{font-size:14px;color:var(--ink-2);margin-top:10px}
  .cta-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--ink);color:rgba(255,255,255,.62);padding:64px 0 30px}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
  .footer-brand{display:inline-flex;align-items:baseline;gap:1px;font-size:20px;color:#fff;margin-bottom:14px;line-height:1}
  .footer-brand b{font-weight:800}
  .footer-brand em{font-style:normal;font-weight:400;color:rgba(255,255,255,.72)}
  .footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.55);max-width:280px}
  .footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.86);margin-bottom:16px}
  .footer-links{display:grid;gap:10px}
  .footer-links a{
    position:relative;display:inline-block;font-size:14px;color:rgba(255,255,255,.62);
    transition:color var(--ease),padding-left var(--ease);
  }
  .footer-links a::before{
    content:"";position:absolute;left:0;top:50%;width:4px;height:4px;border-radius:50%;
    background:var(--orange);transform:translateY(-50%) scale(0);transition:transform var(--ease);
  }
  .footer-links a:hover{color:#fff;padding-left:12px}
  .footer-links a:hover::before{transform:translateY(-50%) scale(1)}
  .footer-contact{display:grid;gap:12px;font-size:14px;color:rgba(255,255,255,.6)}
  .footer-contact strong{display:block;font-size:13px;font-weight:600;color:rgba(255,255,255,.86);margin-bottom:2px}
  .footer-bottom{
    display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
    border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding-top:22px;
    font-size:13px;color:rgba(255,255,255,.48);
  }

  /* ============ 响应式 ============ */
  @media (max-width:1100px){
    .mega-panel{width:620px}
    .page-head-inner{grid-template-columns:1fr 300px;gap:32px}
  }
  @media (max-width:1023px){
    .main-nav{display:none}
    .mega-wrap{display:none}
    .hamburger{display:inline-flex}
    .section{padding:64px 0}
    .section-tight{padding:0 0 64px}
    .showcase{grid-template-columns:1fr;gap:24px}
    .page-head-inner{grid-template-columns:1fr}
    .page-head-media{aspect-ratio:16/9}
    .faq-layout{grid-template-columns:1fr;gap:28px}
    .notes{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  }
  @media (min-width:1024px){
    .mobile-drawer,.drawer-mask{display:none}
  }
  @media (max-width:767px){
    .container{padding:0 20px}
    .section{padding:48px 0}
    .section-tight{padding:0 0 48px}
    .header-inner{height:64px;gap:12px}
    .cta-card{grid-template-columns:1fr;padding:30px 24px;gap:22px}
    .cta-actions{gap:14px}
    .btn-row{grid-template-columns:1fr}
    .metric-band{grid-template-columns:1fr 1fr}
    .metric:nth-child(odd){border-left:0}
    .metric:nth-child(n+3){border-top:1px solid var(--line)}
    .page-title{font-size:clamp(24px,6vw,32px)}
  }
  @media (max-width:519px){
    .metric-band{grid-template-columns:1fr}
    .metric{border-left:0;border-top:1px solid var(--line)}
    .metric:first-child{border-top:0}
    .btn{width:100%}
    .btn-row{gap:10px}
    .spec-card{padding:20px}
    .note-card{padding:22px}
    .footer-grid{grid-template-columns:1fr;gap:28px}
    .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;scroll-behavior:auto}
  }

/* roulang page: category4 */
:root{
  --ink:#17191C;
  --orange:#F0512B;
  --orange-dark:#C93E1C;
  --orange-soft:#FDECE6;
  --graphite:#3A3E44;
  --muted:#6B7076;
  --paper:#F6F4F0;
  --card:#FFFFFF;
  --line:#E5E1D9;
  --green:#1E9E6A;
  --img-bg:#EFECE6;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:12px;
  --shadow:0 1px 2px rgba(23,25,28,.05);
  --shadow-hover:0 12px 28px -14px rgba(23,25,28,.28);
  --t:.17s ease;
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--graphite);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.block{padding-block:72px}
.block--tight{padding-block:48px}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,244,240,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:inline-flex;align-items:baseline;gap:1px;font-size:23px;line-height:1;color:var(--ink);letter-spacing:-.02em;flex:0 0 auto}
.brand b{font-weight:800}
.brand em{font-style:normal;font-weight:400;font-size:20px;color:var(--graphite)}
.brand:hover em{color:var(--orange)}
.main-nav{display:flex;align-items:center;gap:30px;margin-left:6px}
.nav-link{position:relative;display:inline-block;padding:8px 0;font-size:15px;font-weight:500;color:var(--ink);white-space:nowrap;transition:color var(--t)}
.nav-link::after{content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;background:var(--orange);transition:left var(--t),right var(--t)}
.nav-link:hover{color:var(--orange-dark)}
.nav-link:hover::after,.nav-link:focus-visible::after{left:0;right:0}
.nav-link.is-active{color:var(--orange)}
.nav-link.is-active::after{left:0;right:0}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-sm);background:var(--card);color:var(--ink);
  transition:border-color var(--t),background var(--t),transform var(--t);
}
.icon-btn:hover{border-color:var(--ink);transform:translateY(-1px)}
.icon-btn:active{transform:translateY(0)}
.mega-wrap{position:relative}
.mega-trigger{
  display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 16px;
  border:1px solid var(--line);border-radius:var(--r-sm);background:var(--card);
  font-size:14px;font-weight:600;color:var(--ink);
  transition:border-color var(--t),background var(--t),color var(--t);
}
.mega-trigger:hover,.mega-wrap:focus-within .mega-trigger{border-color:var(--ink);color:var(--orange-dark)}
.mega-trigger svg{transition:transform var(--t)}
.mega-wrap:hover .mega-trigger svg,.mega-wrap:focus-within .mega-trigger svg{transform:rotate(180deg)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 12px);width:720px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:0 24px 48px -24px rgba(23,25,28,.35);
  padding:22px;display:grid;grid-template-columns:1.15fr .85fr;gap:22px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity var(--t),transform var(--t),visibility var(--t);
  z-index:90;
}
.mega-wrap:hover .mega-panel,.mega-wrap:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:12px;letter-spacing:.08em;color:var(--muted);margin-bottom:10px}
.mega-link{display:block;padding:10px 12px;border-radius:var(--r-sm);transition:background var(--t)}
.mega-link:hover,.mega-link:focus-visible{background:var(--paper)}
.mega-link span{display:block;font-size:15px;font-weight:600;color:var(--ink)}
.mega-link small{display:block;font-size:13px;color:var(--muted);line-height:1.6;margin-top:2px}
.mega-card{
  display:flex;align-items:center;gap:12px;padding:10px;border:1px solid var(--line);
  border-radius:var(--r-md);transition:border-color var(--t),box-shadow var(--t),transform var(--t);
}
.mega-card:hover{border-color:rgba(240,81,43,.45);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.mega-card img{width:64px;height:48px;object-fit:cover;border-radius:10px;background:var(--img-bg);flex:0 0 auto}
.mega-card span{font-size:14px;font-weight:600;color:var(--ink);line-height:1.5}
.mega-card + .mega-card{margin-top:10px}
.burger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--card);align-items:center;justify-content:center;flex-direction:column;gap:4px}
.burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:background var(--t)}
.burger:hover span{background:var(--orange)}

/* ===== Mobile drawer ===== */
.drawer-overlay{position:fixed;inset:0;background:rgba(23,25,28,.42);opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);z-index:95}
.drawer-overlay.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:380px;background:#fff;z-index:96;
  transform:translateX(102%);transition:transform .22s ease;
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
  box-shadow:-24px 0 48px -32px rgba(23,25,28,.5);
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{width:38px;height:38px;border:1px solid var(--line);border-radius:var(--r-sm);display:inline-flex;align-items:center;justify-content:center;font-size:18px;color:var(--ink)}
.drawer-close:hover{border-color:var(--ink);color:var(--orange)}
.drawer-group{margin-top:20px}
.drawer-label{font-size:12px;letter-spacing:.08em;color:var(--muted);margin-bottom:8px}
.drawer-link{display:block;padding:12px 14px;font-size:15px;font-weight:500;color:var(--ink);border-radius:var(--r-sm);position:relative;transition:background var(--t),color var(--t)}
.drawer-link:hover{background:var(--paper);color:var(--orange-dark)}
.drawer-link.is-active{color:var(--orange)}
.drawer-link.is-active::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;background:var(--orange)}
.drawer-cta{margin-top:auto;padding-top:24px}
.drawer-cta .btn{width:100%}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:background var(--t),color var(--t),transform var(--t),border-color var(--t),box-shadow var(--t);
}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:var(--orange-dark)}
.btn-ghost{border:1px solid #D8D3C9;color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--ink);background:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink);transition:color var(--t),gap var(--t)}
.link-arrow:hover{color:var(--orange);gap:10px}

/* ===== Page hero ===== */
.page-hero{padding-top:28px;padding-bottom:56px}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted);margin-bottom:28px}
.crumb a{transition:color var(--t)}
.crumb a:hover{color:var(--orange)}
.crumb .sep{color:#C4BFB5}
.crumb .current{color:var(--ink)}
.hero-split{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
  background:var(--orange-soft);color:var(--orange-dark);
  font-size:13px;font-weight:600;letter-spacing:.01em;
}
.hero-copy h1{
  margin-top:18px;
  font-size:clamp(30px,4.2vw,50px);font-weight:800;line-height:1.15;letter-spacing:-.01em;color:var(--ink);
}
.hero-lead{margin-top:16px;font-size:17px;line-height:1.7;color:var(--graphite);max-width:34em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.trust-row{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px}
.trust-row li{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;color:var(--muted)}
.trust-row svg{color:var(--green);flex:0 0 auto}
.hero-media{position:relative}
.media{position:relative;overflow:hidden;border-radius:var(--r-lg);background:var(--img-bg);border:1px solid var(--line)}
.media img{width:100%;height:100%;object-fit:cover}
.media--hero{aspect-ratio:16/11}
.float-card{
  position:absolute;left:20px;bottom:20px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);padding:14px 18px;box-shadow:var(--shadow);
  display:flex;align-items:center;gap:16px;
}
.float-card .fc-num{font-size:24px;font-weight:800;color:var(--orange);font-variant-numeric:tabular-nums;line-height:1.1}
.float-card .fc-txt{font-size:12.5px;color:var(--muted);line-height:1.55}
.float-card .fc-txt strong{display:block;color:var(--ink);font-size:13.5px;font-weight:600}

/* ===== Section heading ===== */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px}
.section-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;color:var(--ink);letter-spacing:-.008em}
.section-head p{margin-top:8px;font-size:15px;color:var(--muted);max-width:52em}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ===== Service cards ===== */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--shadow);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.service-card:hover{transform:translateY(-3px);border-color:rgba(240,81,43,.45);box-shadow:var(--shadow-hover)}
.icon-box{
  width:46px;height:46px;border-radius:var(--r-sm);background:var(--orange-soft);
  color:var(--orange);display:grid;place-items:center;margin-bottom:18px;
}
.service-card h3{font-size:19px;font-weight:600;color:var(--ink)}
.service-card p{margin-top:10px;font-size:14.5px;line-height:1.8;color:var(--graphite)}
.service-card .card-foot{margin-top:18px;font-size:14px}

/* ===== Assurance dark band ===== */
.assurance{
  background:var(--ink);border-radius:20px;padding:36px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
}
.assurance li{padding:0 24px;border-left:1px solid rgba(255,255,255,.12)}
.assurance li:first-child{padding-left:0;border-left:0}
.assurance .a-icon{color:var(--orange);margin-bottom:12px}
.assurance strong{display:block;font-size:15.5px;font-weight:600;color:#fff}
.assurance span{display:block;margin-top:6px;font-size:13px;line-height:1.65;color:rgba(255,255,255,.62)}

/* ===== Compare table ===== */
.table-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--card);box-shadow:var(--shadow);
}
table.compare{width:100%;border-collapse:collapse;min-width:660px}
table.compare caption{caption-side:top;text-align:left;padding:20px 24px 0;font-size:13px;color:var(--muted)}
table.compare th{
  background:var(--paper);color:var(--ink);font-size:13.5px;font-weight:600;
  text-align:left;padding:14px 24px;border-bottom:1px solid var(--line);white-space:nowrap;
}
table.compare td{
  padding:16px 24px;border-bottom:1px solid var(--line);
  font-size:14.5px;line-height:1.7;color:var(--graphite);vertical-align:top;
}
table.compare tr:last-child td{border-bottom:0}
table.compare td:first-child{font-weight:600;color:var(--ink);white-space:nowrap}
table.compare tbody tr{transition:background var(--t)}
table.compare tbody tr:hover{background:#FBF9F6}
.pill{display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:999px;background:#EAF6F0;color:#177A52;font-size:12.5px;font-weight:600}

/* ===== FAQ ===== */
.faq-list{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:6px 26px;box-shadow:var(--shadow)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;font-size:16px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--orange-dark)}
.faq-item .plus{font-size:20px;line-height:1;color:var(--orange);transition:transform var(--t);flex:0 0 auto}
.faq-item[open] .plus{transform:rotate(45deg)}
.faq-body{padding:0 0 22px 16px;font-size:15px;line-height:1.85;color:var(--graphite);max-width:74ch}

/* ===== CTA band ===== */
.cta-band{
  background:var(--orange-soft);border-radius:20px;padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(21px,2.4vw,28px);font-weight:700;color:var(--ink);letter-spacing:-.008em}
.cta-band p{margin-top:10px;font-size:15px;color:#7A4A3C;max-width:36em}
.cta-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}

/* ===== Footer ===== */
.site-footer{background:var(--ink);color:#fff;margin-top:96px;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.15fr;gap:40px}
.footer-brand{display:inline-flex;align-items:baseline;gap:1px;font-size:22px;line-height:1;color:#fff}
.footer-brand b{font-weight:800}
.footer-brand em{font-style:normal;font-weight:400;font-size:19px;color:rgba(255,255,255,.72)}
.footer-desc{margin-top:16px;font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.62);max-width:24em}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.72);margin-bottom:16px}
.footer-links li + li{margin-top:10px}
.footer-links a{
  position:relative;display:inline-block;font-size:14px;color:rgba(255,255,255,.62);
  transition:color var(--t),padding-left var(--t);
}
.footer-links a::before{
  content:"";position:absolute;left:-2px;top:50%;transform:translateY(-50%) scale(0);
  width:4px;height:4px;border-radius:50%;background:var(--orange);transition:transform var(--t);
}
.footer-links a:hover{color:#fff;padding-left:12px}
.footer-links a:hover::before{transform:translateY(-50%) scale(1);left:0}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.62);line-height:1.75}
.footer-contact li + li{margin-top:10px}
.footer-contact strong{display:block;font-weight:600;color:rgba(255,255,255,.85);font-size:13px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:48px;padding:24px 0;
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ===== Responsive ===== */
@media (max-width:1023px){
  .main-nav{display:none}
  .mega-wrap{display:none}
  .burger{display:inline-flex}
  .header-inner{height:66px;gap:16px}
  .hero-split{grid-template-columns:1fr;gap:32px}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .assurance{grid-template-columns:repeat(2,1fr);gap:28px 0;padding:28px}
  .assurance li:nth-child(3){padding-left:0;border-left:0}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .mega-panel{display:none}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .block{padding-block:48px}
  .page-hero{padding-bottom:40px}
  .hero-lead{font-size:16px}
  .service-grid{grid-template-columns:1fr}
  .assurance{grid-template-columns:1fr;gap:22px}
  .assurance li{padding:0;border-left:0;padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.12)}
  .assurance li:last-child{padding-bottom:0;border-bottom:0}
  .faq-list{padding:4px 20px}
  .cta-band{padding:28px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{margin-top:64px;padding-top:48px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .hero-actions .btn{flex:1 1 auto}
  .float-card{left:12px;bottom:12px;padding:12px 14px;gap:12px}
  table.compare caption{padding:16px 18px 0}
  table.compare th,table.compare td{padding-inline:18px}
}
@media (max-width:519px){
  .brand{font-size:21px}
  .brand em{font-size:18px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .trust-row{gap:8px 16px}
  .float-card{position:static;margin-top:12px;box-shadow:none}
}