/* roulang page: index */
:root{
  --brand:#FF5A1F;
  --brand-600:#E8480F;
  --brand-050:#FFF1EA;
  --accent:#10B3A3;
  --accent-050:#E6F7F5;
  --ink-900:#14161A;
  --ink-700:#2A2E35;
  --text-600:#5B626B;
  --bg:#F6F6F3;
  --surface:#FFFFFF;
  --surface-2:#FBFBF8;
  --line:#E5E6E1;
  --skeleton:#EDEEEA;
  --success:#1F9D6B;
  --danger:#D9432F;
  --star:#F5B301;
  --r-btn:10px;
  --r-card:14px;
  --r-img:12px;
  --r-lg:20px;
  --sh-1:0 1px 2px rgba(20,22,26,.06);
  --sh-2:0 10px 28px -14px rgba(20,22,26,.22);
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"Barlow Condensed","DIN Alternate","Roboto Mono",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-700);
  font-family:var(--font);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.25;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-alt{background:var(--surface)}
.section-tight{padding:56px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.sec-head h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:10px}
.sec-head p{color:var(--text-600);font-size:15px;line-height:1.75;max-width:660px}
.sec-head .link-more{color:var(--brand);font-size:15px;font-weight:600;white-space:nowrap;transition:color .2s}
.sec-head .link-more:hover{color:var(--brand-600);text-decoration:underline}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--accent);background:var(--accent-050);padding:6px 14px;border-radius:999px;margin-bottom:18px}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:block}

/* 按钮 */
.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 .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-700)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-light{background:#fff;color:var(--ink-900)}
.btn-light:hover{background:var(--brand-050);color:var(--brand-600)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.42);color:#fff}
.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}

/* 头部导航 */
.site-header{position:sticky;top:0;z-index:80}
.brandbar{background:var(--ink-900);color:#fff}
.brandbar .container{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px}
.logo{display:flex;align-items:center;gap:10px;color:#fff}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--brand);display:grid;place-items:center;font-size:16px;font-weight:800;color:#fff;flex:none}
.logo-text{font-size:17px;font-weight:700;letter-spacing:-.01em;line-height:1.15}
.logo-sub{display:block;font-size:11px;font-weight:500;color:#9AA0A8;letter-spacing:.14em}
.brand-actions{display:flex;align-items:center;gap:18px}
.brand-secondary{font-size:14px;color:#C9CDD3;transition:color .2s}
.brand-secondary:hover{color:#fff}
.icon-btn{width:38px;height:38px;border-radius:50%;border:1px solid rgba(255,255,255,.16);display:grid;place-items:center;color:#fff;transition:background .2s,border-color .2s}
.icon-btn:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.32)}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.16);color:#fff;place-items:center}
.nav-toggle:hover{background:rgba(255,255,255,.1)}
.channelbar{background:var(--surface);border-bottom:1px solid var(--line)}
.channel-scroll{display:flex;align-items:center;gap:28px;height:48px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;scroll-snap-type:x proximity}
.channel-scroll::-webkit-scrollbar{display:none}
.channel{position:relative;height:48px;display:inline-flex;align-items:center;font-size:15px;color:var(--text-600);font-weight:500;white-space:nowrap;scroll-snap-align:start;transition:color .2s}
.channel:hover{color:var(--ink-700)}
.channel.is-active{color:var(--brand);font-weight:700}
.channel.is-active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--brand);border-radius:3px 3px 0 0}

/* 移动抽屉 */
.drawer{display:none;position:fixed;top:64px;left:0;right:0;bottom:0;background:var(--surface);z-index:90;padding:20px 18px 32px;flex-direction:column;gap:4px;overflow-y:auto}
.drawer.is-open{display:flex}
.drawer-link{font-size:16px;font-weight:600;color:var(--ink-700);padding:14px 4px;border-bottom:1px solid var(--line)}
.drawer-link.is-active{color:var(--brand)}
.drawer-cta{margin-top:20px}

/* Hero */
.hero{position:relative;background:#FDFCFA;border-bottom:1px solid var(--line);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(20,22,26,.06) 1px,transparent 1px);background-size:22px 22px;pointer-events:none}
.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr 1fr;gap:56px;align-items:center;min-height:560px;padding:64px 0}
.hero h1{font-size:clamp(30px,4vw,44px);margin-bottom:20px}
.hero h1 span{color:var(--brand)}
.hero-lead{font-size:17px;color:var(--text-600);line-height:1.85;max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:var(--text-600)}
.hero-points li{display:flex;align-items:center;gap:8px}
.hero-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
.hero-visual{position:relative}
.hero-shot{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-2)}
.float-card{position:absolute;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 18px;box-shadow:var(--sh-2)}
.float-card span{display:block;font-size:12px;color:var(--text-600)}
.float-card strong{font-family:var(--mono);font-size:22px;color:var(--ink-900);line-height:1.2}
.float-a{left:-20px;top:48px}
.float-b{right:-16px;bottom:44px}
.float-b strong{color:var(--brand)}

/* 价值条 */
.value-strip{display:grid;grid-template-columns:repeat(4,1fr);background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.value-item{padding:32px 26px;border-left:1px solid var(--line)}
.value-item:first-child{border-left:0}
.value-num{display:block;font-family:var(--mono);font-size:22px;font-weight:700;color:var(--brand);margin-bottom:12px}
.value-item h3{font-size:19px;margin-bottom:10px}
.value-item p{font-size:15px;color:var(--text-600);line-height:1.75}

/* 截图轮播 */
.carousel-nav{display:flex;gap:10px}
.car-btn{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink-700);display:grid;place-items:center;font-size:18px;transition:background .2s,color .2s,border-color .2s}
.car-btn:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.shots-track{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;padding-bottom:10px}
.shots-track::-webkit-scrollbar{display:none}
.shot{flex:0 0 380px;scroll-snap-align:start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:12px 12px 18px;transition:box-shadow .25s,transform .25s}
.shot:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.shot-bar{display:flex;gap:6px;padding:2px 6px 12px}
.shot-bar i{width:8px;height:8px;border-radius:50%;background:var(--line);display:block}
.shot img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);background:var(--skeleton)}
.shot-cap{padding:16px 6px 0}
.shot-cap h3{font-size:19px;margin-bottom:8px}
.shot-cap p{font-size:15px;color:var(--text-600);line-height:1.7}
.dots{display:flex;justify-content:center;gap:8px;margin-top:24px}
.dot-btn{width:10px;height:10px;border-radius:999px;background:var(--line);transition:background .2s,width .2s}
.dot-btn.is-active{background:var(--brand);width:26px}

/* 数据条 */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surface)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:24px 0}
.stat{text-align:center;padding:0 16px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat strong{display:block;font-family:var(--mono);font-size:32px;color:var(--ink-900);line-height:1.15}
.stat strong em{font-style:normal;font-size:20px;color:var(--brand);margin-left:2px}
.stat span{display:block;font-size:13px;color:var(--text-600);margin-top:6px}

/* 规格网格 */
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px}
.spec-row{display:flex;align-items:flex-start;gap:14px;padding:20px 0;border-bottom:1px solid var(--line)}
.spec-row svg{flex:none;color:var(--accent);margin-top:3px}
.spec-label{flex:none;width:96px;font-size:14px;color:var(--text-600)}
.spec-value{font-size:15px;font-weight:600;color:var(--ink-700);line-height:1.7}
.spec-value b{font-family:var(--mono);font-weight:700}

/* 评价墙 */
.reviews{columns:3;column-gap:24px}
.review{break-inside:avoid;margin:0 0 24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);transition:transform .25s,box-shadow .25s}
.review:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.quote{display:block;font-size:38px;line-height:.8;color:rgba(255,90,31,.3);font-family:Georgia,serif;margin-bottom:10px}
.review-text{font-size:15px;color:var(--ink-700);line-height:1.8}
.review-foot{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:18px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--text-600)}
.review-name{font-weight:600;color:var(--ink-700)}
.review-device{background:var(--accent-050);color:var(--accent);padding:2px 10px;border-radius:999px;font-size:12px}
.stars{margin-left:auto;color:var(--star);letter-spacing:2px;font-size:13px}

/* 下载组 */
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.dl-card{display:flex;flex-direction:column;gap:12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 22px;transition:border-color .2s,box-shadow .2s,transform .2s}
.dl-card:hover{border-color:var(--brand);box-shadow:var(--sh-2);transform:translateY(-2px)}
.dl-icon{width:42px;height:42px;border-radius:12px;background:var(--brand-050);color:var(--brand);display:grid;place-items:center}
.dl-card h3{font-size:19px}
.dl-meta{font-size:13px;color:var(--text-600);line-height:1.8}
.dl-meta b{font-family:var(--mono);font-weight:700;color:var(--ink-700)}
.dl-link{margin-top:auto;font-size:14px;font-weight:600;color:var(--brand)}
.qr-box{width:120px;height:120px;border:1px dashed var(--line);border-radius:var(--r-img);display:grid;place-items:center;font-size:12px;color:var(--text-600);background:var(--surface-2)}

/* 资讯 */
.news-grid{display:grid;grid-template-columns:5fr 7fr;gap:32px;align-items:start}
.post-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow .25s,transform .25s}
.post-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.post-card-link{display:block}
.post-cover{width:100%;aspect-ratio:3/2;object-fit:cover;background:var(--skeleton)}
.post-body{padding:22px}
.badge{display:inline-block;background:var(--accent-050);color:var(--accent);font-size:12px;font-weight:600;padding:3px 12px;border-radius:999px;margin-bottom:12px}
.post-title{font-size:20px;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card:hover .post-title{color:var(--brand)}
.post-sum{font-size:15px;color:var(--text-600);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{display:flex;gap:14px;margin-top:14px;font-size:13px;color:var(--text-600);font-family:var(--mono)}
.news-list{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
.news-item{border-top:1px solid var(--line)}
.news-item:first-child{border-top:0}
.news-item a{display:grid;grid-template-columns:96px 1fr;gap:16px;padding:16px;align-items:center;transition:background .2s}
.news-item a:hover{background:var(--brand-050)}
.news-thumb{width:96px;height:64px;object-fit:cover;border-radius:10px;background:var(--skeleton)}
.news-item h3{font-size:16px;line-height:1.5;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item a:hover h3{color:var(--brand)}
.news-meta{display:flex;gap:10px;font-size:12.5px;color:var(--text-600);font-family:var(--mono)}
.empty-state{text-align:center;padding:56px 24px;border:1px dashed var(--line);border-radius:var(--r-lg);background:var(--surface);color:var(--text-600);font-size:15px}

/* FAQ */
.faq-wrap{max-width:900px;margin:0 auto;border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);overflow:hidden}
.faq-item{border-top:1px solid var(--line)}
.faq-item:first-child{border-top:0}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;padding:22px 24px;font-size:17px;font-weight:600;color:var(--ink-700);transition:color .2s}
.faq-q:hover{color:var(--brand)}
.faq-item.is-open .faq-q{color:var(--brand)}
.faq-icon{position:relative;width:18px;height:18px;flex:none}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px;transition:transform .25s,opacity .25s}
.faq-icon::before{left:0;right:0;top:8px;height:2px}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 24px 22px;font-size:15px;color:var(--text-600);line-height:1.85}

/* CTA 条 */
.cta-band{position:relative;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;color:#fff;padding:64px 0}
.cta-band::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(20,22,26,.94) 8%,rgba(20,22,26,.74) 100%)}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:10px}
.cta-inner p{color:#C9CDD3;font-size:15px;max-width:620px;line-height:1.8}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 页脚 */
.footer{background:var(--ink-900);color:#9AA0A8;padding-top:56px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1.1fr;gap:32px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand p{font-size:14px;line-height:1.8;margin-top:16px;max-width:280px}
.footer h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:14px}
.footer a{display:block;font-size:14px;color:#9AA0A8;padding:5px 0;transition:color .2s}
.footer a:hover{color:#fff;text-decoration:underline}
.footer-plain{font-size:14px;color:#9AA0A8;padding:5px 0}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:20px 0;font-size:12.5px;color:#7B828A}

/* 响应式 */
@media (max-width:1023px){
  .section{padding:64px 0}
  .hero-inner{grid-template-columns:1fr;gap:40px;min-height:auto;padding:52px 0}
  .value-strip{grid-template-columns:repeat(2,1fr)}
  .value-item:nth-child(odd){border-left:0}
  .value-item:nth-child(n+3){border-top:1px solid var(--line)}
  .news-grid{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .spec-grid{grid-template-columns:1fr;gap:0}
  .reviews{columns:2}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:52px 0}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:26px}
  .brand-actions .brand-secondary,
  .brand-actions .icon-btn,
  .brand-actions .btn{display:none}
  .nav-toggle{display:grid}
  .channel-scroll{mask-image:linear-gradient(90deg,transparent,#000 14px,#000 calc(100% - 14px),transparent)}
  .hero h1{font-size:27px}
  .hero-lead{font-size:16px}
  .hero-actions .btn{flex:1 1 auto}
  .float-card{display:none}
  .shot{flex:0 0 86vw}
  .stats-grid{grid-template-columns:repeat(2,1fr);row-gap:20px}
  .stat:nth-child(odd){border-left:0}
  .stat:nth-child(n+3){border-top:1px solid var(--line);padding-top:20px}
  .spec-row{flex-wrap:wrap;gap:8px}
  .spec-label{width:100px}
  .reviews{columns:1}
  .dl-grid{grid-template-columns:1fr}
  .news-item a{grid-template-columns:80px 1fr;gap:12px}
  .news-thumb{width:80px;height:56px}
  .faq-q{font-size:16px;padding:18px}
  .faq-a p{padding:0 18px 18px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:479px){
  .hero h1{font-size:26px}
  .value-item{padding:24px 20px}
}

/* roulang page: article */
:root{
  --brand:#FF5A1F;
  --brand-600:#E8480F;
  --brand-050:#FFF1EA;
  --accent:#10B3A3;
  --accent-050:#E6F7F5;
  --ink-900:#14161A;
  --ink-700:#2A2E35;
  --text-600:#5B626B;
  --text-400:#8C929B;
  --bg:#F6F6F3;
  --surface:#FFFFFF;
  --line:#E5E6E1;
  --skeleton:#EDEEEA;
  --success:#1F9D6B;
  --danger:#D9432F;
  --star:#F5B301;
  --radius-btn:10px;
  --radius-card:14px;
  --radius-img:12px;
  --radius-block:20px;
  --shadow-1:0 1px 2px rgba(20,22,26,.06);
  --shadow-2:0 10px 28px -14px rgba(20,22,26,.22);
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Barlow Condensed","DIN Alternate","PingFang SC",sans-serif;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.7;
  color:var(--ink-700);
  background:var(--bg);
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--brand);}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:0;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink-700);line-height:1.25;letter-spacing:-.01em;font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.brandbar{
  height:64px;
  display:flex;
  align-items:center;
  gap:20px;
  border-bottom:1px solid var(--line);
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:10px;
  background:var(--brand);
  color:#fff;
  font-size:17px;
  font-weight:700;
  letter-spacing:0;
}
.logo-text{
  font-size:18px;
  font-weight:700;
  color:var(--ink-900);
  display:flex;
  align-items:baseline;
  gap:6px;
}
.logo-sub{
  font-size:12px;
  font-weight:500;
  color:var(--text-600);
  letter-spacing:.04em;
}
.brandbar-right{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:14px;
}
.icon-btn{
  width:38px;height:38px;
  display:grid;place-items:center;
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--text-600);
  background:var(--surface);
  transition:border-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--shadow-1);}
.icon-btn svg{width:18px;height:18px;}
.link-quiet{
  font-size:14px;
  color:var(--text-600);
  padding:6px 2px;
}
.link-quiet:hover{color:var(--ink-700);}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  padding:11px 20px;
  border:1px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-2);}
.btn-ghost{background:var(--surface);color:var(--ink-700);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-sm{padding:8px 14px;font-size:14px;}
.brandbar .btn{padding:9px 18px;}
.hamburger{
  display:none;
  width:38px;height:38px;
  border:1px solid var(--line);
  border-radius:10px;
  place-items:center;
  color:var(--ink-700);
}
.hamburger svg{width:18px;height:18px;}

.channelbar{
  background:#FBFBF9;
  border-bottom:1px solid var(--line);
}
.channel-scroll{
  display:flex;
  align-items:center;
  gap:26px;
  height:48px;
  overflow-x:auto;
  scrollbar-width:none;
  scroll-snap-type:x proximity;
}
.channel-scroll::-webkit-scrollbar{display:none;}
.channel{
  position:relative;
  flex:0 0 auto;
  scroll-snap-align:start;
  font-size:15px;
  color:var(--text-600);
  padding:14px 0 13px;
  border-bottom:3px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.channel:hover{color:var(--ink-700);}
.channel.is-active{
  color:var(--brand);
  font-weight:700;
  border-bottom-color:var(--brand);
}

/* 移动端抽屉 */
.drawer{
  display:none;
  position:fixed;
  inset:64px 0 0 0;
  z-index:55;
  background:rgba(20,22,26,.42);
}
.drawer.is-open{display:block;}
.drawer-panel{
  background:var(--surface);
  padding:18px 24px 28px;
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-2);
  max-height:80vh;
  overflow-y:auto;
}
.drawer-panel h4{
  font-size:13px;
  color:var(--text-400);
  font-weight:600;
  letter-spacing:.08em;
  margin:16px 0 8px;
}
.drawer-panel h4:first-child{margin-top:0;}
.drawer-panel a{
  display:block;
  padding:12px 0;
  font-size:16px;
  border-bottom:1px solid var(--line);
  color:var(--ink-700);
}
.drawer-panel a:hover{color:var(--brand);}

/* ============ 面包屑 ============ */
.crumb-bar{
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-600);
  padding:14px 0;
}
.crumb a{color:var(--text-600);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--text-400);}
.crumb .now{color:var(--ink-700);font-weight:600;}

/* ============ 文章头 ============ */
.article-head{
  background:var(--surface);
  padding:40px 0 0;
}
.article-head-inner{
  max-width:820px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--accent);
  background:var(--accent-050);
  border-radius:999px;
  padding:4px 12px;
  margin-bottom:16px;
}
.article-head h1{
  font-size:clamp(26px,3.6vw,40px);
  color:var(--ink-900);
  margin-bottom:18px;
}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 18px;
  font-size:13px;
  color:var(--text-600);
  padding-bottom:8px;
}
.meta-row .dot{
  width:3px;height:3px;border-radius:50%;background:var(--text-400);
}
.meta-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.meta-chip svg{width:14px;height:14px;color:var(--text-400);}
.head-visual{
  margin-top:24px;
  border-radius:var(--radius-block);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--surface);
}
.head-visual img{
  width:100%;
  aspect-ratio:16/7;
  object-fit:cover;
  border-radius:0;
}

/* ============ 双栏布局 ============ */
.layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:40px;
  align-items:start;
  padding:44px 0 72px;
}
.article-body{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-block);
  padding:36px 40px 40px;
  box-shadow:var(--shadow-1);
  max-width:820px;
}
.prose{
  font-size:17px;
  line-height:1.9;
  color:var(--ink-700);
  letter-spacing:.01em;
}
.prose p{margin:0 0 1.15em;}
.prose h2{
  font-size:26px;
  margin:1.7em 0 .7em;
  padding-left:14px;
  border-left:4px solid var(--brand);
  color:var(--ink-900);
}
.prose h3{
  font-size:20px;
  margin:1.5em 0 .6em;
  color:var(--ink-700);
}
.prose h4{font-size:17px;margin:1.3em 0 .5em;}
.prose ul,.prose ol{margin:0 0 1.15em 1.2em;padding:0;}
.prose ul{list-style:disc;}
.prose ol{list-style:decimal;}
.prose li{margin:.45em 0;}
.prose blockquote{
  margin:1.4em 0;
  padding:16px 20px;
  background:var(--brand-050);
  border-left:4px solid var(--brand);
  border-radius:0 var(--radius-img) var(--radius-img) 0;
  color:var(--ink-700);
}
.prose img{
  width:100%;
  margin:1.4em 0;
  border-radius:var(--radius-img);
}
.prose figure{margin:1.4em 0;}
.prose figcaption{
  font-size:13px;
  color:var(--text-600);
  text-align:center;
  margin-top:8px;
}
.prose a{color:var(--accent);border-bottom:1px solid var(--accent-050);}
.prose a:hover{color:var(--brand);border-bottom-color:var(--brand-050);}
.prose code{
  background:var(--skeleton);
  border-radius:6px;
  padding:2px 6px;
  font-family:var(--font-num);
  font-size:15px;
}
.prose table{
  width:100%;
  border-collapse:collapse;
  font-size:15px;
  margin:1.4em 0;
  border:1px solid var(--line);
  border-radius:var(--radius-img);
  overflow:hidden;
}
.prose th,.prose td{
  padding:10px 14px;
  border-bottom:1px solid var(--line);
  text-align:left;
}
.prose th{background:#FAFAF8;font-weight:600;color:var(--ink-700);}

.empty-state{
  text-align:center;
  padding:56px 20px;
}
.empty-state .empty-icon{
  width:56px;height:56px;
  margin:0 auto 18px;
  display:grid;place-items:center;
  border-radius:16px;
  background:var(--brand-050);
  color:var(--brand);
}
.empty-state .empty-icon svg{width:26px;height:26px;}
.empty-state h2{font-size:20px;margin-bottom:10px;}
.empty-state p{color:var(--text-600);margin-bottom:20px;}

/* ============ 侧栏 ============ */
.sidebar{
  display:flex;
  flex-direction:column;
  gap:20px;
  position:sticky;
  top:132px;
}
.side-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px;
  box-shadow:var(--shadow-1);
}
.side-card h3{
  font-size:15px;
  color:var(--ink-900);
  margin-bottom:14px;
  display:flex;
  align-items:center;
  gap:8px;
}
.side-card h3::before{
  content:"";
  width:3px;height:14px;
  border-radius:2px;
  background:var(--brand);
}
.toc-list a{
  display:block;
  font-size:14px;
  color:var(--text-600);
  padding:7px 0 7px 12px;
  border-left:2px solid var(--line);
  line-height:1.5;
}
.toc-list a:hover,.toc-list a.is-current{
  color:var(--brand);
  border-left-color:var(--brand);
}
.side-post{
  display:flex;
  gap:12px;
  padding:12px 0;
  border-bottom:1px solid var(--line);
}
.side-post:last-child{border-bottom:0;padding-bottom:0;}
.side-post img{
  width:72px;
  height:52px;
  object-fit:cover;
  flex-shrink:0;
  border-radius:8px;
}
.side-post .st{
  font-size:14px;
  font-weight:600;
  color:var(--ink-700);
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.side-post:hover .st{color:var(--brand);}
.side-post .sm{
  font-size:12px;
  color:var(--text-400);
  margin-top:4px;
}
.dl-card{
  background:var(--ink-900);
  border-radius:var(--radius-card);
  padding:22px 20px;
  color:#fff;
}
.dl-card h3{font-size:16px;color:#fff;margin-bottom:8px;}
.dl-card p{font-size:13px;color:#9AA0A8;line-height:1.7;margin-bottom:16px;}
.dl-card .btn-primary{width:100%;}
.dl-card .dl-meta{
  font-size:12px;
  color:#7E848C;
  margin-top:12px;
  display:flex;
  justify-content:space-between;
  gap:8px;
}

/* ============ 文末操作区 ============ */
.after-body{
  margin-top:28px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:20px;
}
.tag{
  font-size:12px;
  color:var(--accent);
  background:var(--accent-050);
  border-radius:999px;
  padding:5px 12px;
  transition:background-color .2s ease,color .2s ease;
}
.tag:hover{background:var(--accent);color:#fff;}
.share-row{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-600);
}
.share-row .share-btn{
  border:1px solid var(--line);
  border-radius:999px;
  padding:6px 14px;
  font-size:13px;
  color:var(--text-600);
  background:var(--surface);
}
.share-row .share-btn:hover{border-color:var(--brand);color:var(--brand);}
.prevnext{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  margin-top:44px;
}
.pn-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:18px 20px;
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.pn-card:hover{
  border-color:#D9DAD4;
  box-shadow:var(--shadow-2);
  transform:translateY(-2px);
}
.pn-card .pn-label{
  font-size:12px;
  color:var(--text-400);
  margin-bottom:8px;
  letter-spacing:.06em;
}
.pn-card .pn-title{
  font-size:15px;
  font-weight:600;
  color:var(--ink-700);
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.pn-card:hover .pn-title{color:var(--brand);}

/* ============ 板块通用 ============ */
.section{padding:64px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:28px;
}
.section-head h2{
  font-size:clamp(22px,2.6vw,28px);
  color:var(--ink-900);
}
.section-head p{
  font-size:14px;
  color:var(--text-600);
  margin-top:8px;
}
.more-link{
  font-size:14px;
  font-weight:600;
  color:var(--brand);
  white-space:nowrap;
}
.more-link:hover{color:var(--brand-600);}

.rec-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.rec-card{
  display:block;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:box-shadow .28s ease,transform .28s ease;
}
.rec-card:hover{
  box-shadow:var(--shadow-2);
  transform:translateY(-3px);
}
.rec-thumb{
  overflow:hidden;
  aspect-ratio:3/2;
  background:var(--skeleton);
}
.rec-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:0;
  transition:transform .35s ease;
}
.rec-card:hover .rec-thumb img{transform:scale(1.03);}
.rec-body{padding:16px 18px 18px;}
.rec-body .badge{
  display:inline-block;
  font-size:11px;
  font-weight:600;
  color:var(--accent);
  background:var(--accent-050);
  border-radius:999px;
  padding:3px 10px;
  margin-bottom:10px;
}
.rec-body h3{
  font-size:17px;
  line-height:1.45;
  color:var(--ink-700);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rec-card:hover .rec-body h3{color:var(--brand);}
.rec-body p{
  font-size:14px;
  line-height:1.7;
  color:var(--text-600);
  margin-top:8px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rec-meta{
  display:flex;
  gap:14px;
  font-size:13px;
  color:var(--text-400);
  margin-top:14px;
  padding-top:12px;
  border-top:1px solid var(--line);
}

/* ============ FAQ ============ */
.faq-wrap{
  max-width:840px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  overflow:hidden;
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:last-child{border-bottom:0;}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  text-align:left;
  padding:18px 22px;
  font-size:17px;
  font-weight:600;
  color:var(--ink-700);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand);}
.faq-item.is-open .faq-q{color:var(--brand);}
.faq-sign{
  position:relative;
  width:16px;height:16px;
  flex-shrink:0;
}
.faq-sign::before,.faq-sign::after{
  content:"";
  position:absolute;
  background:currentColor;
  border-radius:2px;
  transition:transform .25s ease,opacity .25s ease;
}
.faq-sign::before{left:0;top:7px;width:16px;height:2px;}
.faq-sign::after{top:0;left:7px;width:2px;height:16px;}
.faq-item.is-open .faq-sign::after{transform:rotate(90deg);opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.faq-a p{
  padding:0 22px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-600);
}

/* ============ CTA 条 ============ */
.cta-band{
  background:var(--ink-900);
  border-radius:var(--radius-block);
  padding:44px 48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;
  top:-60px;
  width:260px;height:260px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,90,31,.28),transparent 70%);
  pointer-events:none;
}
.cta-band h2{
  color:#fff;
  font-size:clamp(20px,2.4vw,26px);
  margin-bottom:10px;
}
.cta-band p{
  color:#9AA0A8;
  font-size:15px;
  max-width:560px;
  line-height:1.75;
}
.cta-actions{
  display:flex;
  gap:12px;
  flex-shrink:0;
  position:relative;
  z-index:1;
}
.cta-band .btn-ghost{
  background:transparent;
  color:#fff;
  border-color:rgba(255,255,255,.28);
}
.cta-band .btn-ghost:hover{
  border-color:var(--brand);
  color:var(--brand);
}

/* ============ 页脚 ============ */
.footer{
  background:var(--ink-900);
  color:#9AA0A8;
  margin-top:72px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr 1.2fr;
  gap:32px;
  padding:56px 0 40px;
}
.footer .logo-text{color:#fff;}
.footer .logo-sub{color:#7E848C;}
.footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:#9AA0A8;
  margin-top:16px;
  max-width:280px;
}
.footer h4{
  font-size:14px;
  color:#fff;
  font-weight:600;
  margin-bottom:14px;
}
.footer-grid a{
  display:block;
  font-size:14px;
  color:#9AA0A8;
  padding:5px 0;
  line-height:1.6;
}
.footer-grid a:hover{color:#fff;text-decoration:underline;}
.footer-plain{
  display:block;
  font-size:14px;
  color:#9AA0A8;
  padding:5px 0;
  line-height:1.6;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 26px;
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:12.5px;
  color:#7E848C;
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .layout{
    grid-template-columns:1fr;
    gap:32px;
    padding:36px 0 56px;
  }
  .sidebar{position:static;}
  .article-body{max-width:none;padding:28px 26px 32px;}
  .rec-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .brandbar{height:60px;gap:12px;}
  .logo-text{font-size:16px;}
  .logo-sub{display:none;}
  .link-quiet{display:none;}
  .hamburger{display:grid;}
  .drawer{inset:60px 0 0 0;}
  .channel-scroll{gap:20px;height:46px;}
  .article-head{padding:28px 0 0;}
  .head-visual img{aspect-ratio:16/9;}
  .section{padding:48px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
  .rec-grid{grid-template-columns:1fr;}
  .prevnext{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px;padding:40px 0 28px;}
  .footer-brand{grid-column:1 / -1;}
  .footer-brand p{max-width:none;}
  .footer-bottom{flex-direction:column;gap:8px;font-size:12px;}
  .article-body{padding:22px 18px 26px;}
  .prose{font-size:16px;line-height:1.85;}
  .prose h2{font-size:21px;}
  .prose h3{font-size:18px;}
  .faq-q{font-size:16px;padding:16px 18px;}
  .faq-a p{padding:0 18px 18px;}
}
@media (max-width:519px){
  .brandbar .btn{display:none;}
  .footer-grid{grid-template-columns:1fr;}
  .meta-row{gap:8px 12px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category1 */
:root{
  --brand:#FF5A1F;
  --brand-600:#E8480F;
  --brand-050:#FFF1EA;
  --accent:#10B3A3;
  --accent-050:#E6F7F5;
  --ink-900:#14161A;
  --ink-700:#2A2E35;
  --text-600:#5B626B;
  --bg:#F6F6F3;
  --surface:#FFFFFF;
  --line:#E5E6E1;
  --skeleton:#EDEEEA;
  --success:#1F9D6B;
  --danger:#D9432F;
  --star:#F5B301;
  --r-btn:10px;
  --r-card:14px;
  --r-img:12px;
  --r-lg:20px;
  --sh-1:0 1px 2px rgba(20,22,26,.06);
  --sh-2:0 10px 28px -14px rgba(20,22,26,.22);
  --mono:"Barlow Condensed","DIN Alternate","Roboto Condensed",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  color:var(--ink-700);
  background:var(--bg);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 顶部品牌行 ---------- */
.brandbar{background:var(--ink-900);color:#fff}
.brandbar-inner{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand),#FF8A4C);
  display:grid;place-items:center;color:#fff;font-size:17px;font-weight:700;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;font-size:16px;font-weight:700;letter-spacing:.02em;color:#fff}
.logo-sub{font-size:11px;font-weight:500;letter-spacing:.16em;color:#9AA0A8}
.brandbar-actions{display:flex;align-items:center;gap:14px}
.icon-btn{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  color:#C9CED6;border:1px solid rgba(255,255,255,.16);transition:color .2s,border-color .2s;
}
.icon-btn:hover{color:#fff;border-color:rgba(255,255,255,.4)}
.text-link{font-size:14px;color:#C9CED6;transition:color .2s}
.text-link:hover{color:#fff}
.nav-toggle{
  display:none;width:38px;height:38px;border-radius:10px;border:1px solid rgba(255,255,255,.16);
  color:#C9CED6;place-items:center;
}
.nav-toggle:hover{color:#fff;border-color:rgba(255,255,255,.4)}
.mobile-drawer{display:none;background:#1B1E23;border-top:1px solid rgba(255,255,255,.08)}
.mobile-drawer.is-open{display:block}
.mobile-drawer .container{display:flex;flex-direction:column;padding-top:10px;padding-bottom:16px}
.mobile-drawer a{color:#C9CED6;font-size:15px;padding:11px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.mobile-drawer a:last-child{border-bottom:0}
.mobile-drawer a:hover{color:#fff}

/* ---------- 频道行 ---------- */
.channelbar{background:var(--surface);border-bottom:1px solid var(--line)}
.channel-scroll{display:flex;gap:28px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;scroll-snap-type:x proximity}
.channel-scroll::-webkit-scrollbar{display:none}
.channel{
  position:relative;padding:15px 2px;font-size:15px;color:var(--text-600);
  white-space:nowrap;border-bottom:3px solid transparent;scroll-snap-align:start;transition:color .2s,border-color .2s;
}
.channel:hover{color:var(--ink-700)}
.channel.is-active{color:var(--brand);font-weight:700;border-bottom-color:var(--brand)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;transition:background .2s,color .2s,border-color .2s,box-shadow .2s,transform .2s;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-600);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:#fff;color:var(--ink-700);border-color:var(--line)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost-light{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.36)}
.btn-ghost-light:hover{background:rgba(255,255,255,.18);border-color:#fff}
.btn-sm{height:36px;padding:0 14px;font-size:14px}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---------- 页头 ---------- */
.page-head{
  background:linear-gradient(180deg,#FFFFFF 0%,#FBFAF7 100%);
  border-bottom:1px solid var(--line);
  padding:28px 0 48px;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-600);margin-bottom:24px;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#B9BEB6}
.breadcrumb .current{color:var(--ink-700);font-weight:600}
.page-head-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.14em;
  color:var(--accent);background:var(--accent-050);padding:6px 13px;border-radius:999px;
}
.page-head h1{
  margin-top:16px;font-size:clamp(30px,4vw,44px);line-height:1.22;
  letter-spacing:-.01em;color:var(--ink-900);
}
.lede{margin-top:16px;font-size:17px;line-height:1.85;color:var(--text-600);max-width:640px}
.page-head-actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
.page-head-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh-1);
}

/* ---------- 主体布局 ---------- */
.layout{
  display:grid;grid-template-columns:240px minmax(0,1fr);gap:36px;
  padding-top:52px;padding-bottom:80px;align-items:start;
}
.sidebar{position:sticky;top:24px;display:flex;flex-direction:column;gap:16px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px;box-shadow:var(--sh-1);
}
.side-title{font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--ink-900);margin-bottom:12px}
.side-nav a{
  display:block;font-size:14px;color:var(--text-600);padding:7px 8px 7px 12px;
  border-left:2px solid transparent;border-radius:0 6px 6px 0;transition:color .2s,background .2s,border-color .2s;
}
.side-nav a:hover{color:var(--brand);background:var(--brand-050);border-left-color:var(--brand)}
.side-channels a{
  display:block;font-size:14px;color:var(--text-600);padding:9px 0;
  border-bottom:1px dashed var(--line);transition:color .2s;
}
.side-channels a:last-child{border-bottom:0}
.side-channels a:hover{color:var(--brand)}
.side-channels a.is-current{color:var(--brand);font-weight:700}
.side-download{
  position:relative;overflow:hidden;color:#fff;
  background-image:linear-gradient(160deg,rgba(20,22,26,.94),rgba(20,22,26,.86)),
    url(/assets/images/backpic/back-3.png);
  background-size:cover;background-position:center;
  border-color:#242A2F;
}
.side-download .side-title{color:#fff}
.side-download p{font-size:13.5px;line-height:1.75;color:#9AA0A8;margin-bottom:14px}

/* ---------- 内容区块通用 ---------- */
.content{min-width:0;display:flex;flex-direction:column}
.block{margin-bottom:60px;scroll-margin-top:88px}
.block:last-child{margin-bottom:0}
.block-head{margin-bottom:24px;max-width:760px}
.block-head h2{
  font-size:clamp(23px,2.4vw,28px);line-height:1.32;letter-spacing:-.01em;color:var(--ink-900);
}
.block-head p{margin-top:10px;font-size:15.5px;line-height:1.8;color:var(--text-600)}
.badge{
  display:inline-block;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;
  background:var(--accent-050);color:var(--accent);
}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform .25s,box-shadow .25s;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.card-media{aspect-ratio:3/2;overflow:hidden;background:var(--skeleton)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:18px 18px 22px}
.card-body h3{margin-top:12px;font-size:19px;line-height:1.45;color:var(--ink-900);transition:color .2s}
.card:hover .card-body h3{color:var(--brand)}
.card-body p{margin-top:8px;font-size:15px;line-height:1.75;color:var(--text-600)}

/* ---------- 图文 + 规格 ---------- */
.split{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:30px;align-items:center}
.split figure{margin:0}
.split figure img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh-1);
}
.spec-grid{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
}
.spec-row{display:flex;align-items:center;gap:14px;padding:15px 18px;border-top:1px solid var(--line)}
.spec-row:first-child{border-top:0}
.spec-icon{
  width:34px;height:34px;flex:0 0 auto;border-radius:10px;display:grid;place-items:center;
  background:var(--brand-050);color:var(--brand);
}
.spec-label{flex:1;font-size:14px;color:var(--text-600)}
.spec-value{
  font-family:var(--mono);font-size:16px;font-weight:600;letter-spacing:.02em;color:var(--ink-900);
  white-space:nowrap;
}

/* ---------- 流程时间线 ---------- */
.timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.step{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 18px 24px;box-shadow:var(--sh-1);transition:border-color .2s,box-shadow .2s;
}
.step:hover{border-color:#DADBD4;box-shadow:var(--sh-2)}
.step-num{display:block;font-family:var(--mono);font-size:28px;font-weight:700;line-height:1;color:var(--brand)}
.step h3{margin-top:14px;font-size:17px;line-height:1.45;color:var(--ink-900)}
.step p{margin-top:8px;font-size:14.5px;line-height:1.75;color:var(--text-600)}

/* ---------- 行式列表 ---------- */
.row-list{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);
}
.row-item{
  display:grid;grid-template-columns:44px minmax(0,1fr) auto 18px;gap:16px;align-items:center;
  padding:16px 20px;border-top:1px solid var(--line);transition:background .2s;
}
.row-item:first-child{border-top:0}
.row-item:hover{background:var(--bg)}
.row-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:var(--accent-050);color:var(--accent);
}
.row-item h3{font-size:16.5px;line-height:1.4;color:var(--ink-900);transition:color .2s}
.row-item:hover h3{color:var(--brand)}
.row-item p{margin-top:3px;font-size:13.5px;color:var(--text-600)}
.row-metric{font-family:var(--mono);font-size:15.5px;font-weight:600;color:var(--ink-700);white-space:nowrap}
.row-arrow{color:#A8AEA6;display:grid;place-items:center}

/* ---------- FAQ ---------- */
.faq{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1)}
.faq-item{border-top:1px solid var(--line)}
.faq-item:first-child{border-top:0}
.faq-q{margin:0}
.faq-q button{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:19px 20px;text-align:left;font-size:17px;font-weight:600;color:var(--ink-700);
  transition:color .2s;
}
.faq-q button:hover{color:var(--brand)}
.faq-item.is-open .faq-q button{color:var(--brand)}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 auto;color:currentColor}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;transition:transform .25s ease}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 20px 20px;font-size:15.5px;line-height:1.85;color:var(--text-600)}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;padding:68px 0;color:#fff;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(20,22,26,.95),rgba(20,22,26,.76));
}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:34px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(23px,2.6vw,30px);line-height:1.32;color:#fff}
.cta-band p{margin-top:12px;max-width:640px;font-size:16px;line-height:1.85;color:#C9CED6}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink-900);color:#9AA0A8;padding-top:56px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:32px;
  padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand p{margin-top:14px;max-width:300px;font-size:14px;line-height:1.8;color:#9AA0A8}
.footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px}
.footer a{display:block;font-size:14px;color:#9AA0A8;padding:5px 0;transition:color .2s}
.footer a:hover{color:#fff;text-decoration:underline}
.footer-plain{display:block;font-size:14px;padding:5px 0;color:#9AA0A8}
.footer-bottom{
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:20px 0 28px;font-size:12.5px;color:#7C838C;
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .layout{grid-template-columns:1fr;gap:30px;padding-top:38px;padding-bottom:60px}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap;top:auto}
  .sidebar .side-card{flex:1 1 260px}
  .page-head-grid{grid-template-columns:1fr;gap:30px}
  .split{grid-template-columns:1fr;gap:26px}
  .timeline{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .brandbar-actions .text-link{display:none}
  .nav-toggle{display:grid}
  .channelbar{position:sticky;top:0;z-index:40;box-shadow:0 1px 0 rgba(20,22,26,.06)}
  .channel-scroll{gap:20px}
  .page-head{padding:20px 0 38px}
  .page-head h1{font-size:27px}
  .page-head-actions .btn{flex:1 1 auto}
  .card-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr}
  .row-item{grid-template-columns:40px minmax(0,1fr) auto;gap:12px;padding:15px 16px}
  .row-arrow{display:none}
  .row-icon{width:40px;height:40px}
  .side-download{flex:1 1 100%}
  .cta-band{padding:52px 0}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .block{margin-bottom:48px}
}
@media (max-width:480px){
  .logo-text{font-size:15px}
  .logo-sub{font-size:10px;letter-spacing:.12em}
  .row-metric{font-size:14px}
  .spec-value{font-size:15px}
}

/* roulang page: category2 */
:root{
  --brand:#FF5A1F;
  --brand-600:#E8480F;
  --brand-050:#FFF1EA;
  --accent:#10B3A3;
  --accent-700:#0C8C80;
  --accent-050:#E6F7F5;
  --ink-900:#14161A;
  --ink-700:#2A2E35;
  --text-600:#5B626B;
  --text-400:#8A9099;
  --bg:#F6F6F3;
  --surface:#FFFFFF;
  --line:#E5E6E1;
  --skeleton:#EDEEEA;
  --success:#1F9D6B;
  --danger:#D9432F;
  --star:#F5B301;
  --r-btn:10px;
  --r-card:14px;
  --r-img:12px;
  --r-block:20px;
  --sh-1:0 1px 2px rgba(20,22,26,.06);
  --sh-2:0 10px 28px -14px rgba(20,22,26,.22);
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --mono:"Barlow Condensed","DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::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:1.7;
  letter-spacing:.01em;
  color:var(--ink-700);
  background:var(--bg);
}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;color:var(--ink-700)}
p{margin:0}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ============ 通用按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease,box-shadow .22s ease;white-space:nowrap}
.btn svg{width:17px;height:17px;flex:0 0 auto}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px -10px rgba(255,90,31,.9)}
.btn-primary:hover{background:var(--brand-600);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.42)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.btn-outline{background:#fff;color:var(--ink-700);border-color:var(--line)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-050)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}

/* ============ 顶部品牌行 ============ */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.topbar-inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:17px;font-weight:700;flex:0 0 auto}
.logo-text{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em;line-height:1.15}
.logo-sub{display:block;font-size:11px;font-weight:400;letter-spacing:.08em;color:var(--text-400)}
.topbar-actions{display:flex;align-items:center;gap:20px}
.icon-btn{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);background:#fff;display:grid;place-items:center;color:var(--text-600);transition:.2s}
.icon-btn:hover{color:var(--brand);border-color:var(--brand)}
.icon-btn svg{width:17px;height:17px}
.top-link{font-size:14px;color:var(--text-600);transition:color .2s}
.top-link:hover{color:var(--ink-700);text-decoration:underline;text-underline-offset:4px}

/* ============ 频道行 ============ */
.channelbar{background:var(--bg);border-top:1px solid var(--line)}
.channel-scroll{display:flex;gap:26px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;scroll-snap-type:x proximity}
.channel-scroll::-webkit-scrollbar{display:none}
.channel{position:relative;flex:0 0 auto;line-height:47px;font-size:15px;color:var(--text-600);white-space:nowrap;transition:color .2s;scroll-snap-align:start}
.channel:hover{color:var(--ink-700)}
.channel.is-active{color:var(--brand);font-weight:700}
.channel.is-active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--brand);border-radius:3px 3px 0 0}

/* ============ 深色通栏首屏 ============ */
.hero-dark{position:relative;background:var(--ink-900);color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.3}
.hero-mask{position:absolute;inset:0;background:linear-gradient(112deg,rgba(20,22,26,.96) 8%,rgba(20,22,26,.74) 52%,rgba(20,22,26,.93) 100%)}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center;padding-top:70px;padding-bottom:74px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:rgba(16,179,163,.18);color:#7FE3D6;font-size:13px;font-weight:600;letter-spacing:.04em}
.hero-dark h1{margin-top:20px;font-size:clamp(28px,3.6vw,42px);color:#fff;letter-spacing:-.01em}
.hero-lead{margin-top:18px;font-size:17px;line-height:1.8;color:#C6CBD2;max-width:640px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-facts{display:flex;flex-wrap:wrap;gap:14px 34px;margin-top:34px;padding-top:24px;border-top:1px solid rgba(255,255,255,.14)}
.hero-facts li{display:flex;flex-direction:column;gap:2px}
.hero-facts b{font-size:26px;color:#fff;line-height:1.1}
.hero-facts span{font-size:13px;color:#9AA0A8}
.hero-panel{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-block);padding:24px 24px 12px;backdrop-filter:none}
.hero-panel h2{font-size:16px;color:#fff;font-weight:600;letter-spacing:0}
.hero-panel .panel-sub{font-size:13px;color:#9AA0A8;margin-top:6px}
.spec-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:14px}
.spec-row:last-child{border-bottom:0}
.spec-row span{color:#9AA0A8}
.spec-row b{color:#fff;font-weight:600}

/* ============ 锚点导航条 ============ */
.anchorbar{background:#fff;border-bottom:1px solid var(--line)}
.anchor-scroll{display:flex;gap:10px;overflow-x:auto;padding-top:12px;padding-bottom:12px;scrollbar-width:none}
.anchor-scroll::-webkit-scrollbar{display:none}
.anchor{flex:0 0 auto;padding:8px 15px;border:1px solid var(--line);border-radius:999px;font-size:14px;color:var(--text-600);background:#fff;transition:.2s}
.anchor:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-050)}

/* ============ 板块基础 ============ */
.section{padding:78px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head .tag{display:inline-block;font-size:13px;font-weight:600;color:var(--accent-700);background:var(--accent-050);padding:4px 12px;border-radius:999px;margin-bottom:14px}
.section-head h2{font-size:clamp(24px,2.6vw,30px)}
.section-head p{margin-top:12px;font-size:16px;color:var(--text-600);line-height:1.8}
section[id],div[id]{scroll-margin-top:132px}

/* ============ 卡片 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow .25s ease,transform .25s ease}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.card-media{position:relative;aspect-ratio:3/2;overflow:hidden;background:var(--skeleton)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale(1.04)}
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;background:var(--accent-050);color:var(--accent-700);font-size:12px;font-weight:600;letter-spacing:.02em}
.badge-brand{background:var(--brand-050);color:var(--brand-600)}
.card-body{padding:20px 22px 24px}
.card-body h3{font-size:20px}
.card-body p{margin-top:10px;font-size:15px;line-height:1.75;color:var(--text-600)}
.meta-list{margin:16px 0 18px;border-top:1px solid var(--line)}
.meta-list li{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px solid var(--line);font-size:13px;color:var(--text-600)}
.meta-list li:last-child{border-bottom:0}
.meta-list b{color:var(--ink-700);font-weight:600}

/* ============ 编号流程条 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--r-block);overflow:hidden;box-shadow:var(--sh-1)}
.step{padding:26px 24px;border-left:1px solid var(--line)}
.step:first-child{border-left:0}
.step-no{font-family:var(--mono);font-size:22px;font-weight:700;color:var(--brand);letter-spacing:.04em}
.step h3{margin-top:12px;font-size:18px}
.step p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--text-600)}

/* ============ 双列：图文卡 + 折叠问答 ============ */
.mix-cols{display:grid;grid-template-columns:.95fr 1.05fr;gap:32px;align-items:start}
.stack{display:flex;flex-direction:column;gap:22px}
.note-card{background:var(--brand-050);border:1px solid #FBD9C8;border-radius:var(--r-card);padding:20px 22px}
.note-card h3{font-size:17px;color:var(--brand-600)}
.note-card p{margin-top:8px;font-size:14px;line-height:1.75;color:#7A4A31}
.note-card a{color:var(--brand-600);font-weight:600;text-decoration:underline;text-underline-offset:4px}

.faq{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden;box-shadow:var(--sh-1)}
.faq-item+.faq-item{border-top:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:17px 20px;background:none;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--ink-700);transition:color .2s}
.faq-q:hover{color:var(--brand)}
.faq-item.open .faq-q{color:var(--brand)}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 20px 18px;font-size:15px;line-height:1.85;color:var(--text-600)}

/* ============ 规格网格 ============ */
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 36px;background:#fff;border:1px solid var(--line);border-radius:var(--r-block);padding:8px 28px;box-shadow:var(--sh-1)}
.spec-item{display:flex;align-items:center;gap:14px;padding:18px 0;border-bottom:1px solid var(--line)}
.spec-item:nth-last-child(-n+2){border-bottom:0}
.spec-item svg{width:20px;height:20px;color:var(--accent);flex:0 0 auto}
.spec-item .label{font-size:14px;color:var(--text-600);flex:1 1 auto}
.spec-item .value{font-size:14px;font-weight:600;color:var(--ink-700);text-align:right}

/* ============ 相关频道 ============ */
.related-card{display:flex;gap:20px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:18px;box-shadow:var(--sh-1);transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease}
.related-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#DADBD4}
.related-card .thumb{width:132px;flex:0 0 auto;aspect-ratio:3/2;border-radius:var(--r-img);overflow:hidden;background:var(--skeleton)}
.related-card .thumb img{width:100%;height:100%;object-fit:cover}
.related-card h3{font-size:18px}
.related-card p{margin-top:8px;font-size:14px;color:var(--text-600);line-height:1.7}
.related-card .more{display:inline-block;margin-top:12px;font-size:14px;font-weight:600;color:var(--brand)}

/* ============ 底部 CTA 与表单 ============ */
.cta-band{background:var(--ink-900);border-radius:var(--r-block);padding:44px 44px;color:#fff;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,28px)}
.cta-band p{margin-top:12px;font-size:15px;line-height:1.8;color:#C6CBD2}
.sub-form{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}
.sub-form input{flex:1 1 240px;height:46px;padding:0 15px;border:1px solid rgba(255,255,255,.24);border-radius:var(--r-btn);background:rgba(255,255,255,.06);font-size:15px;color:#fff;transition:border-color .2s,box-shadow .2s}
.sub-form input::placeholder{color:#8A9099}
.sub-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,90,31,.24)}
.sub-form input.is-invalid{border-color:#FF8A6B;box-shadow:0 0 0 3px rgba(217,67,47,.22)}
.form-msg{margin-top:12px;font-size:13px;min-height:19px}
.form-msg.is-err{color:#FFB4A2}
.form-msg.is-ok{color:#7FE3D6}
.dl-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.dl-links a{display:inline-flex;align-items:center;padding:7px 14px;border:1px solid rgba(255,255,255,.24);border-radius:999px;font-size:13px;color:#C6CBD2;transition:.2s}
.dl-links a:hover{border-color:var(--brand);color:#fff;background:rgba(255,90,31,.16)}

/* ============ 页脚 ============ */
.footer{background:var(--ink-900);color:#9AA0A8;padding:58px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1.15fr;gap:28px}
.footer h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px}
.footer a{display:block;font-size:14px;color:#9AA0A8;padding:5px 0;transition:color .2s}
.footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-plain{display:block;font-size:14px;padding:5px 0}
.footer-brand p{margin-top:14px;font-size:14px;line-height:1.8;max-width:330px}
.footer .logo-text{color:#fff}
.footer .logo-sub{color:#9AA0A8}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.1);margin-top:38px;padding:18px 0 22px;font-size:13px;color:#8A9099}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .hero-inner{gap:40px}
}
@media (max-width:1023px){
  .hero-inner{grid-template-columns:1fr;padding-top:54px;padding-bottom:56px;gap:34px}
  .hero-lead{max-width:none}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .mix-cols{grid-template-columns:1fr;gap:26px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step:nth-child(3){border-left:0;border-top:1px solid var(--line)}
  .step:nth-child(4){border-top:1px solid var(--line)}
  .spec-grid{grid-template-columns:1fr;padding:8px 24px}
  .spec-item:nth-last-child(-n+2){border-bottom:1px solid var(--line)}
  .spec-item:last-child{border-bottom:0}
  .cta-band{grid-template-columns:1fr;padding:36px 28px;gap:26px}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:26px 24px}
  .footer-brand{grid-column:1/-1}
  section[id],div[id]{scroll-margin-top:124px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .topbar-inner{height:56px}
  .top-link{display:none}
  .channelbar{position:sticky;top:56px;z-index:55;border-bottom:1px solid var(--line)}
  .channel{line-height:43px;font-size:14px}
  .section{padding:52px 0}
  .section-head{margin-bottom:26px}
  .grid-3,.grid-2{grid-template-columns:1fr;gap:18px}
  .steps{grid-template-columns:1fr}
  .step{border-left:0;border-top:1px solid var(--line);padding:20px}
  .step:first-child{border-top:0}
  .hero-facts{gap:12px 26px}
  .hero-facts b{font-size:22px}
  .hero-panel{padding:20px 20px 8px}
  .related-card{flex-direction:column;align-items:flex-start}
  .related-card .thumb{width:100%}
  .cta-band{padding:30px 22px;border-radius:16px}
  .footer{padding-top:44px}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .footer-bottom{flex-direction:column;gap:6px}
  section[id],div[id]{scroll-margin-top:112px}
}
@media (max-width:520px){
  .hero-cta .btn{width:100%}
  .btn{padding:0 18px}
  .sub-form input{flex:1 1 100%}
  .sub-form .btn{width:100%}
}