/* roulang page: index */
/* ===================== 设计变量 ===================== */
:root{
  --ink-900:#14100D;
  --ink-700:#3B322B;
  --ink-500:#6B5F55;
  --line:#E7DCD0;
  --bg:#FAF6F0;
  --surface:#FFFFFF;
  --brand:#E0632B;
  --brand-700:#B84A18;
  --brand-050:#FCEDE3;
  --accent:#1E4B45;
  --accent-050:#E4EEEB;
  --ok:#2F7D5F;
  --ok-bg:#E8F3EE;
  --err:#C0392B;
  --err-bg:#FBEDEA;
  --skeleton:#EFE7DC;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --sh-1:0 1px 2px rgba(20,16,13,.06),0 8px 24px -12px rgba(20,16,13,.14);
  --sh-2:0 18px 40px -22px rgba(20,16,13,.28);
  --container:1200px;
}

/* ===================== Reset / Base ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-900);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,figure,blockquote,ol,ul{margin:0}
ol,ul{padding:0;list-style:none}
img{display:block;max-width:100%;height:auto;background:var(--skeleton)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
::selection{background:var(--brand-050);color:var(--brand-700)}
[id]{scroll-margin-top:120px}

/* ===================== 容器与通用排版 ===================== */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:48px}
.section-head.with-link{
  max-width:none;display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--brand-700);
  text-transform:none;margin-bottom:14px;
}
.eyebrow::before{content:"";display:block;width:4px;height:16px;background:var(--brand);border-radius:2px}
h1{font-size:42px;line-height:1.3;font-weight:800;letter-spacing:-.01em}
h2{font-size:31px;line-height:1.35;font-weight:800;letter-spacing:-.01em}
h3{font-size:21px;line-height:1.5;font-weight:700}
.lead{font-size:17px;color:var(--ink-500);line-height:1.85;margin-top:16px}
.body-text{font-size:16.5px;color:var(--ink-500);line-height:1.85}
.tnum{font-variant-numeric:tabular-nums}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-md);
  font-size:16px;font-weight:600;line-height:1;
  border:1.5px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px -16px rgba(224,99,43,.9)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);background:var(--brand-700)}
.btn-secondary{background:transparent;border-color:var(--accent);color:var(--accent)}
.btn-secondary:hover{background:var(--accent-050)}
.btn-secondary:active{background:var(--accent-050);transform:translateY(1px)}
.btn-light{background:transparent;border-color:rgba(250,246,240,.55);color:#FAF6F0}
.btn-light:hover{background:rgba(250,246,240,.12);border-color:#FAF6F0}
.btn-light:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14.5px;border-radius:10px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
  transition:color .18s ease,text-decoration-thickness .18s ease;
}
.link-more:hover{color:var(--brand-700);text-decoration-thickness:2px}
.link-arrow{display:inline-flex;align-items:center;gap:4px;font-size:14.5px;font-weight:600;color:var(--brand);transition:gap .18s ease,color .18s ease}
.link-arrow:hover{gap:9px;color:var(--brand-700)}

/* ===================== 徽章 / 标签 ===================== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;line-height:1.4;white-space:nowrap;
}
.badge-brand{background:var(--brand-050);color:var(--brand-700)}
.badge-accent{background:var(--accent-050);color:var(--accent)}
.badge-ink{background:rgba(20,16,13,.08);color:var(--ink-700)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;max-width:100%}

/* ===================== 导航 ===================== */
.site-header{position:relative;z-index:60;background:var(--surface)}
.nav-top{border-bottom:1px solid var(--line)}
.nav-top-inner{
  display:flex;align-items:center;gap:24px;
  height:64px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{display:inline-flex;align-items:flex-end;gap:3px;height:22px}
.logo-mark i{display:block;width:5px;border-radius:2px;background:var(--brand)}
.logo-mark i:nth-child(1){height:10px}
.logo-mark i:nth-child(2){height:16px;background:var(--ink-900)}
.logo-mark i:nth-child(3){height:22px;background:var(--accent)}
.logo-text{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink-900);white-space:nowrap}
.logo-sub{
  font-size:12px;font-weight:600;color:var(--brand-700);background:var(--brand-050);
  padding:2px 7px;border-radius:999px;margin-left:8px;vertical-align:2px;
}
.nav-tools{display:flex;align-items:center;gap:14px;margin-left:auto}
.nav-search{
  display:flex;align-items:center;gap:8px;
  width:236px;height:40px;padding:0 14px;
  border:1px solid var(--line);border-radius:999px;background:var(--bg);
  transition:border-color .18s ease,background-color .18s ease;
}
.nav-search:focus-within{border-color:var(--brand);background:var(--surface)}
.nav-search svg{flex:0 0 auto;color:var(--ink-500)}
.nav-search input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14px;color:var(--ink-900);
}
.nav-search input::placeholder{color:var(--ink-500)}
.nav-tel{
  font-size:14px;font-weight:700;color:var(--ink-700);font-variant-numeric:tabular-nums;
  padding-left:14px;border-left:1px solid var(--line);
  transition:color .18s ease;
}
.nav-tel:hover{color:var(--brand-700)}
.nav-icon-btn{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;color:var(--ink-700);
  transition:background-color .18s ease,color .18s ease;
}
.nav-icon-btn:hover{background:var(--brand-050);color:var(--brand-700)}

.nav-channels{position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:0 6px 18px -16px rgba(20,16,13,.5)}
.channels-inner{
  display:flex;align-items:center;gap:8px;
  height:52px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
}
.channels-inner::-webkit-scrollbar{display:none}
.channel{
  display:inline-flex;align-items:center;
  height:36px;padding:0 16px;border-radius:999px;
  font-size:15px;font-weight:600;color:var(--ink-700);white-space:nowrap;
  transition:background-color .16s ease,color .16s ease;
}
.channel:hover{background:var(--brand-050);color:var(--brand-700)}
.channel.is-active{background:var(--brand);color:#fff}
.channel.is-active:hover{background:var(--brand-700);color:#fff}

/* ===================== Hero ===================== */
.hero{position:relative;overflow:hidden;background:var(--ink-900);color:#FAF6F0}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,16,13,.88),rgba(20,16,13,.6) 48%,rgba(20,16,13,.28));
}
.hero-inner{
  position:relative;z-index:2;
  min-height:560px;display:flex;flex-direction:column;justify-content:center;
  padding-top:88px;padding-bottom:76px;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;align-self:flex-start;
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:#FAF6F0;background:rgba(250,246,240,.12);
  border:1px solid rgba(250,246,240,.28);
  padding:6px 14px;border-radius:999px;margin-bottom:22px;
}
.hero h1{max-width:760px;color:#fff}
.hero-sub{
  max-width:600px;margin-top:20px;
  font-size:17.5px;line-height:1.8;color:rgba(250,246,240,.82);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:0;margin-top:48px;max-width:720px;
}
.hero-stat{padding:0 24px;border-left:1px solid rgba(250,246,240,.24)}
.hero-stat:first-child{padding-left:0;border-left:0}
.hero-stat-idx{display:block;font-size:12px;font-weight:600;color:var(--brand);letter-spacing:.14em;font-variant-numeric:tabular-nums}
.hero-stat-num{
  display:block;font-size:38px;line-height:1.15;font-weight:800;
  color:#FAF6F0;font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.hero-stat-num .unit{font-size:18px;font-weight:700;margin-left:2px;color:var(--brand)}
.hero-stat-cap{display:block;font-size:13px;color:rgba(250,246,240,.72);margin-top:4px}

/* ===================== 痛点 ===================== */
.pain-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:start}
.pain-head{grid-column:1/5;position:sticky;top:120px}
.pain-list{grid-column:6/13}
.pain-item{
  display:grid;grid-template-columns:56px 1fr;gap:20px;
  padding:26px 0;border-top:1px dashed var(--line);
}
.pain-item:last-child{border-bottom:1px dashed var(--line)}
.pain-idx{
  font-size:22px;font-weight:800;color:var(--brand);
  font-variant-numeric:tabular-nums;line-height:1.3;
}
.pain-item h3{margin-bottom:6px}
.pain-item p{font-size:15.5px;color:var(--ink-500);line-height:1.8}

/* ===================== 解决方案（交错图文） ===================== */
.feature{
  display:grid;grid-template-columns:repeat(12,1fr);gap:24px;
  align-items:center;margin-bottom:64px;
}
.feature:last-of-type{margin-bottom:0}
.feature-media{grid-column:1/7}
.feature-body{grid-column:8/13}
.feature.reverse .feature-media{grid-column:7/13}
.feature.reverse .feature-body{grid-column:1/6;grid-row:1}
.feature-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-lg);box-shadow:var(--sh-1);
  transition:transform .4s ease,box-shadow .4s ease;
}
.feature-media{overflow:hidden;border-radius:var(--r-lg)}
.feature-media:hover img{transform:scale(1.03);box-shadow:var(--sh-2)}
.feature-body h3{margin-bottom:12px}
.feature-body p{color:var(--ink-500);font-size:16px}
.feature-points{margin:20px 0 22px;display:grid;gap:10px}
.feature-points li{
  position:relative;padding-left:20px;font-size:15.5px;color:var(--ink-700);
}
.feature-points li::before{
  content:"";position:absolute;left:0;top:11px;
  width:8px;height:8px;border-radius:2px;background:var(--brand);
}

/* ===================== 成果 / 指标 ===================== */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  margin-bottom:48px;
}
.metric{padding:30px 26px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0}
.metric-num{
  font-size:38px;line-height:1.15;font-weight:800;color:var(--accent);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.metric-num .unit{font-size:17px;font-weight:700;margin-left:2px}
.metric-cap{display:block;font-size:14px;color:var(--ink-500);margin-top:6px}

.strip{
  display:flex;gap:20px;overflow-x:auto;padding-bottom:14px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.strip::-webkit-scrollbar{display:none}
.strip-item{flex:0 0 300px}
.strip-item figure{
  position:relative;border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--sh-1);transition:box-shadow .3s ease,transform .3s ease;
}
.strip-item figure:hover{box-shadow:var(--sh-2);transform:translateY(-4px)}
.strip-item img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s ease}
.strip-item figure:hover img{transform:scale(1.04)}
.strip-cap{
  position:absolute;inset:auto 0 0 0;
  padding:36px 16px 14px;
  background:linear-gradient(to top,rgba(20,16,13,.86),rgba(20,16,13,0));
  color:#FAF6F0;
}
.strip-cap strong{display:block;font-size:15.5px;font-weight:700;line-height:1.5}
.strip-cap span{display:block;font-size:12.5px;color:rgba(250,246,240,.76);margin-top:2px}

/* ===================== 资讯卡片 ===================== */
.news-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:32px}
.news-main{grid-column:1/8}
.news-side{grid-column:8/13;display:flex;flex-direction:column;gap:20px}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#DFD2C3}
.card-media{display:block;overflow:hidden;background:var(--skeleton)}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:22px 24px 20px}
.card-body h3{margin:12px 0 10px;font-size:21px;line-height:1.5}
.card-body h3 a{transition:color .18s ease}
.card-body h3 a:hover{color:var(--brand-700)}
.card-body p{font-size:15.5px;color:var(--ink-500);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--ink-500);
}
.card-foot time{font-variant-numeric:tabular-nums}

.card-row{
  display:grid;grid-template-columns:108px 1fr;gap:16px;
  padding:16px;align-items:flex-start;
}
.row-thumb{display:block;border-radius:10px;overflow:hidden;background:var(--skeleton)}
.row-thumb img{width:100%;aspect-ratio:1/1;object-fit:cover;transition:transform .4s ease}
.card-row:hover .row-thumb img{transform:scale(1.05)}
.card-row h3{font-size:16.5px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-row h3 a:hover{color:var(--brand-700)}
.card-row .card-foot{margin-top:10px;padding-top:10px;border-top:0;justify-content:flex-start;gap:10px}
.news-more{display:flex;justify-content:center;margin-top:40px}

.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-md);
  padding:64px 24px;text-align:center;background:var(--bg);
}
.empty-state svg{margin:0 auto 16px;color:var(--ink-500)}
.empty-state h3{color:var(--ink-700);margin-bottom:8px}
.empty-state p{font-size:15px;color:var(--ink-500);margin-bottom:22px}

/* ===================== 客户证言 ===================== */
.testi-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:32px;align-items:start}
.testi-head{grid-column:1/5;position:sticky;top:120px}
.testi-quote-mark{
  font-size:72px;line-height:.9;color:var(--accent);font-weight:800;
  font-family:Georgia,"Songti SC",serif;margin-bottom:12px;
}
.testi-list{grid-column:6/13;display:grid;gap:20px}
.testi{
  background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--accent);
  border-radius:var(--r-md);padding:26px 28px;
  transition:box-shadow .25s ease,transform .25s ease;
}
.testi:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.testi p{font-size:16.5px;line-height:1.85;color:var(--ink-700)}
.testi-meta{display:flex;align-items:center;gap:12px;margin-top:16px;flex-wrap:wrap}
.testi-name{font-size:15px;font-weight:700;color:var(--ink-900)}
.testi-role{font-size:13.5px;color:var(--ink-500)}

/* ===================== FAQ ===================== */
.faq-wrap{max-width:900px}
.faq-list{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:var(--surface)}
.faq-item{border-top:1px solid var(--line)}
.faq-item:first-child{border-top:0}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:62px;padding:18px 24px;cursor:pointer;list-style:none;
  font-size:16.5px;font-weight:600;color:var(--ink-900);
  transition:background-color .18s ease,color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--brand-050);color:var(--brand-700)}
.faq-item summary::after{
  content:"";flex:0 0 auto;width:14px;height:14px;
  background:
    linear-gradient(var(--brand),var(--brand)) center/14px 2px no-repeat,
    linear-gradient(var(--brand),var(--brand)) center/2px 14px no-repeat;
  transition:transform .22s ease;
}
.faq-item[open] summary{background:var(--brand-050);color:var(--brand-700)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-answer{padding:0 24px 22px;font-size:16px;line-height:1.85;color:var(--ink-500)}

/* ===================== CTA ===================== */
.cta-band{background:var(--ink-900);color:#FAF6F0;position:relative;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.14;
}
.cta-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:repeat(12,1fr);gap:32px;align-items:center;
  padding-top:88px;padding-bottom:88px;
}
.cta-text{grid-column:1/8}
.cta-text h2{color:#fff;max-width:560px}
.cta-text p{margin-top:16px;color:rgba(250,246,240,.76);font-size:16.5px;max-width:520px}
.cta-form{grid-column:8/13;background:rgba(250,246,240,.06);border:1px solid rgba(250,246,240,.18);border-radius:var(--r-lg);padding:28px}
.cta-form .field{margin-bottom:16px}
.cta-form label{display:block;font-size:13px;font-weight:600;color:rgba(250,246,240,.82);margin-bottom:8px}
.cta-form .req{color:var(--brand)}
.cta-form input{
  width:100%;height:48px;padding:0 14px;
  border:1px solid rgba(250,246,240,.24);border-radius:var(--r-sm);
  background:rgba(20,16,13,.35);color:#FAF6F0;outline:none;
  transition:border-color .18s ease;
}
.cta-form input::placeholder{color:rgba(250,246,240,.42)}
.cta-form input:focus{border:2px solid var(--brand);padding:0 13px}
.form-note{font-size:12.5px;color:rgba(250,246,240,.56);margin-top:12px;line-height:1.7}
.alert{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px 14px;border-radius:var(--r-sm);
  font-size:14px;line-height:1.7;margin-top:14px;
}
.alert-ok{background:var(--ok-bg);color:var(--ok);border-left:4px solid var(--ok)}
.alert-err{background:var(--err-bg);color:var(--err);border-left:4px solid var(--err)}

/* ===================== 页脚 ===================== */
.site-footer{background:var(--ink-900);color:#FAF6F0;border-top:4px solid var(--brand)}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:48px;
  padding-top:64px;padding-bottom:48px;
}
.footer-brand .logo-text{color:#FAF6F0}
.footer-brand .logo-sub{background:rgba(224,99,43,.18);color:#F0A17A}
.footer-desc{font-size:14.5px;line-height:1.85;color:rgba(250,246,240,.68);margin-top:18px;max-width:340px}
.footer-contact{margin-top:20px;display:grid;gap:8px}
.footer-contact li{font-size:14px;color:rgba(250,246,240,.72);font-variant-numeric:tabular-nums}
.footer-contact li strong{color:#FAF6F0;font-weight:700;margin-right:6px}
.footer-col h4{font-size:14px;font-weight:600;color:#FAF6F0;margin-bottom:18px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:11px}
.footer-col a{
  display:inline-block;font-size:14px;color:rgba(250,246,240,.72);
  transition:color .18s ease,transform .18s ease;
}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:20px;padding-bottom:26px;border-top:1px solid rgba(250,246,240,.14);
  font-size:13px;color:rgba(250,246,240,.52);
}
.footer-bottom .domain{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ===================== 响应式 ===================== */
@media (max-width:1279px){
  .container{padding:0 28px}
  h1{font-size:38px}
  h2{font-size:29px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .section{padding:72px 0}
  .nav-search{width:190px}
  .nav-tel{display:none}
  .hero-inner{min-height:460px;padding-top:64px;padding-bottom:56px}
  h1{font-size:34px}
  .hero h1{max-width:640px}
  .hero-stat-num{font-size:32px}
  .pain-head,.testi-head{position:static;grid-column:1/13;margin-bottom:8px}
  .pain-list,.testi-list{grid-column:1/13}
  .feature-media,.feature.reverse .feature-media{grid-column:1/7;grid-row:auto}
  .feature-body,.feature.reverse .feature-body{grid-column:8/13;grid-row:auto}
  .news-main{grid-column:1/13}
  .news-side{grid-column:1/13;display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(2){border-right:0}
  .metric:nth-child(3),.metric:nth-child(4){border-top:1px solid var(--line)}
  .cta-text,.cta-form{grid-column:1/13}
  .cta-inner{padding-top:72px;padding-bottom:72px}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:40px;padding-top:56px}
}
@media (max-width:767px){
  body{font-size:16px}
  .nav-search{display:none}
  .nav-icon-btn{display:inline-flex}
  h1{font-size:30px}
  h2{font-size:25px}
  h3{font-size:19px}
  .hero-inner{min-height:420px;padding-top:56px;padding-bottom:48px}
  .hero-sub{font-size:16px}
  .hero-actions .btn{flex:1 1 auto}
  .hero-stats{grid-template-columns:repeat(2,1fr);row-gap:22px;margin-top:36px}
  .hero-stat{padding:0 16px}
  .hero-stat:nth-child(3){padding-left:0;border-left:0}
  .feature{grid-template-columns:1fr;gap:20px;margin-bottom:48px}
  .feature-media,.feature-body,.feature.reverse .feature-media,.feature.reverse .feature-body{grid-column:1/-1}
  .pain-item{grid-template-columns:40px 1fr;gap:14px;padding:20px 0}
  .pain-idx{font-size:18px}
  .news-side{grid-template-columns:1fr}
  .testi{padding:22px}
  .cta-form{padding:22px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .footer-desc{max-width:none}
  .section-head.with-link{align-items:flex-start;flex-direction:column;gap:12px}
}
@media (max-width:519px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .logo-text{font-size:17px}
  .logo-sub{margin-left:6px}
  .metrics{grid-template-columns:1fr}
  .metric{border-right:0;border-top:1px solid var(--line);padding:22px 20px}
  .metric:first-child{border-top:0}
  .metric-num{font-size:32px}
  .hero-stat-num{font-size:28px}
  .card-body{padding:18px 18px 16px}
  .card-body h3{font-size:18.5px}
  .card-row{grid-template-columns:84px 1fr;padding:14px}
  .strip-item{flex:0 0 240px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}

/* roulang page: article */
:root{
  --ink-900:#14100D;
  --ink-700:#3B322B;
  --ink-500:#6B5F55;
  --line:#E7DCD0;
  --bg:#FAF6F0;
  --surface:#FFFFFF;
  --brand:#E0632B;
  --brand-700:#B84A18;
  --brand-050:#FCEDE3;
  --accent:#1E4B45;
  --accent-050:#E4EEEB;
  --skeleton:#EFE7DC;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --sh-1:0 1px 2px rgba(20,16,13,.06), 0 8px 24px -12px rgba(20,16,13,.14);
  --sh-2:0 18px 40px -22px rgba(20,16,13,.28);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink-900);
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.tnum{font-variant-numeric:tabular-nums}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(250,246,240,.97);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(1.15) blur(8px);
}
.nav-top{height:64px;display:flex;align-items:center}
.nav-top-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:100%}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{display:inline-flex;align-items:flex-end;gap:3px;height:26px}
.logo-mark i{display:block;width:5px;border-radius:2px;background:var(--brand)}
.logo-mark i:nth-child(1){height:12px}
.logo-mark i:nth-child(2){height:22px;background:var(--accent)}
.logo-mark i:nth-child(3){height:16px}
.logo-text{font-size:18px;font-weight:800;letter-spacing:.02em;color:var(--ink-900);white-space:nowrap}
.logo-sub{
  display:inline-block;
  margin-left:6px;
  padding:1px 7px;
  font-size:11px;
  font-weight:600;
  color:var(--brand-700);
  background:var(--brand-050);
  border-radius:999px;
  vertical-align:2px;
}
.nav-tools{display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;
  align-items:center;
  gap:8px;
  width:220px;
  height:38px;
  padding:0 14px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--ink-500);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-050)}
.nav-search input{width:100%;border:0;outline:0;background:transparent;font-size:13px;color:var(--ink-900)}
.nav-search input::placeholder{color:#9A8F85}
.nav-icon-btn{
  display:none;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border-radius:var(--r-sm);
  color:var(--ink-700);
  transition:background .2s ease,color .2s ease;
}
.nav-icon-btn:hover{background:var(--brand-050);color:var(--brand-700)}
.nav-tel{
  font-size:14px;
  font-weight:600;
  color:var(--ink-700);
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
  transition:color .2s ease;
}
.nav-tel:hover{color:var(--brand-700)}
.nav-channels{border-top:1px solid var(--line);background:rgba(255,255,255,.62)}
.channels-inner{
  display:flex;
  align-items:center;
  gap:6px;
  overflow-x:auto;
  padding-top:6px;
  padding-bottom:6px;
  scrollbar-width:none;
}
.channels-inner::-webkit-scrollbar{display:none}
.channel{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 16px;
  border-radius:999px;
  font-size:14px;
  color:var(--ink-700);
  white-space:nowrap;
  transition:background .2s ease,color .2s ease;
}
.channel:hover{background:var(--brand-050);color:var(--brand-700)}
.channel.is-active{background:var(--brand);color:#fff;font-weight:600}

/* ============ 按钮与徽章 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border:1.5px solid transparent;
  border-radius:var(--r-md);
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
  transition:transform .18s ease,background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 12px 26px -18px rgba(224,99,43,.95)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--accent);border-color:var(--accent)}
.btn-ghost:hover{background:var(--accent-050);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-light{background:#FAF6F0;color:var(--ink-900)}
.btn-light:hover{background:#fff;transform:translateY(-1px)}
.btn-outline-light{background:transparent;color:#FAF6F0;border-color:rgba(250,246,240,.55)}
.btn-outline-light:hover{border-color:#FAF6F0;background:rgba(250,246,240,.1)}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:10px}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.badge{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
}
.badge-brand{background:var(--brand-050);color:var(--brand-700)}
.badge-accent{background:var(--accent-050);color:var(--accent)}
.badge-ink{background:rgba(20,16,13,.07);color:var(--ink-700)}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:24px 0 0;
  font-size:13px;
  color:var(--ink-500);
}
.breadcrumb a{transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand-700)}
.breadcrumb .crumb-sep{color:#C3B7AB}
.breadcrumb .crumb-current{color:var(--ink-700);max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头部 ============ */
.article-head-inner{padding:28px 0 8px}
.article-title{
  max-width:760px;
  font-size:40px;
  line-height:1.35;
  font-weight:800;
  letter-spacing:-.005em;
}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 20px;
  margin-top:22px;
  padding-bottom:26px;
  border-bottom:1px solid var(--line);
  font-size:13px;
  color:var(--ink-500);
}
.meta-row .meta-dot{width:4px;height:4px;border-radius:50%;background:#C3B7AB}
.cover-figure{
  margin:32px 0 0;
}
.cover-media{
  position:relative;
  aspect-ratio:16/9;
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--skeleton);
}
.cover-media img{width:100%;height:100%;object-fit:cover}
.cover-figure figcaption{margin-top:12px;font-size:12px;color:var(--ink-500);line-height:1.7}

/* ============ 正文布局 ============ */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,760px) 260px;
  gap:64px;
  justify-content:center;
  padding:48px 0 72px;
}
.article-body{font-size:17px;line-height:1.9;color:var(--ink-900);min-width:0;overflow-wrap:break-word}
.article-body p{margin:0 0 1.1em}
.article-body h2{
  position:relative;
  margin:42px 0 16px;
  padding-left:16px;
  font-size:28px;
  line-height:1.35;
  font-weight:800;
  scroll-margin-top:130px;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.22em;
  bottom:.22em;
  width:4px;
  border-radius:2px;
  background:var(--brand);
}
.article-body h3{margin:32px 0 12px;font-size:22px;line-height:1.5;font-weight:700;scroll-margin-top:130px}
.article-body h4{margin:26px 0 10px;font-size:18px;font-weight:700}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:1.3em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:.45em}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{
  margin:28px 0;
  padding:16px 22px;
  border-left:3px solid var(--accent);
  background:var(--accent-050);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink-700);
  font-style:normal;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:24px 0}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:12px;color:var(--ink-500);margin-top:10px;text-align:center}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.article-body a:hover{color:var(--brand-700);text-decoration-thickness:2px}
.article-body strong{font-weight:700}
.article-body hr{border:0;border-top:1px dashed var(--line);margin:36px 0}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;line-height:1.7}
.article-body th{background:var(--brand-050);color:var(--ink-900);text-align:left;font-weight:600;padding:12px 14px;border:1px solid var(--line)}
.article-body td{padding:12px 14px;border:1px solid var(--line);color:var(--ink-700)}
.article-body code{background:var(--brand-050);color:var(--brand-700);padding:2px 6px;border-radius:6px;font-size:14px}

/* ============ 侧栏 ============ */
.article-aside{min-width:0}
.aside-card{
  position:sticky;
  top:130px;
  padding:24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
}
.aside-card h3{font-size:15px;font-weight:700;margin-bottom:14px}
.aside-list li{padding:10px 0;border-top:1px dashed var(--line);font-size:14px;color:var(--ink-700)}
.aside-list li:first-child{border-top:0;padding-top:0}
.aside-list a{transition:color .2s ease}
.aside-list a:hover{color:var(--brand-700)}
.aside-note{margin-top:16px;padding:14px;background:var(--brand-050);border-radius:var(--r-sm);font-size:13px;line-height:1.7;color:var(--brand-700)}
.aside-tel{display:block;margin-top:16px;font-size:20px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums}

/* ============ 文末 ============ */
.article-foot{
  padding-bottom:64px;
}
.foot-divider{border-top:1px solid var(--line);padding-top:28px}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.tag-row .tag-label{font-size:13px;color:var(--ink-500);margin-right:4px}
.tag{
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 14px;
  border-radius:999px;
  background:rgba(20,16,13,.05);
  color:var(--ink-700);
  font-size:13px;
  transition:background .2s ease,color .2s ease;
}
.tag:hover{background:var(--brand-050);color:var(--brand-700)}
.foot-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:26px}

/* ============ 通用板块 ============ */
.section{padding:88px 0}
.section-alt{background:#F5EEE5}
.section-head{max-width:720px;margin-bottom:40px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.1em;
  color:var(--brand);
}
.eyebrow::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--brand)}
.section-title{font-size:30px;line-height:1.35;font-weight:800;margin-top:12px}
.section-desc{margin-top:12px;color:var(--ink-500);font-size:16px}

/* ============ 相关推荐卡片 ============ */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#D9CABA}
.card-media{aspect-ratio:16/10;background:var(--skeleton);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{display:flex;flex-direction:column;gap:10px;padding:20px}
.card-body h3{font-size:18px;line-height:1.5;font-weight:700}
.card-body p{font-size:14px;line-height:1.75;color:var(--ink-500)}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:6px;font-size:13px;color:var(--ink-500)}
.card-meta .arrow{color:var(--brand);font-weight:700;transition:transform .2s ease}
.card:hover .card-meta .arrow{transform:translateX(3px)}

/* ============ FAQ ============ */
.faq{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden}
.faq details{border-top:1px solid var(--line)}
.faq details:first-child{border-top:0}
.faq summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:60px;
  padding:16px 22px;
  font-size:16px;
  font-weight:600;
  list-style:none;
  cursor:pointer;
  transition:background .2s ease,color .2s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{background:var(--brand-050)}
.faq details[open] summary{background:var(--brand-050);color:var(--brand-700)}
.faq-icon{
  flex:0 0 auto;
  width:24px;
  height:24px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:var(--surface);
  border:1px solid var(--line);
  color:var(--brand-700);
  font-size:16px;
  line-height:1;
  transition:transform .25s ease;
}
.faq details[open] .faq-icon{transform:rotate(45deg)}
.faq-body{padding:0 22px 20px;font-size:16px;line-height:1.85;color:var(--ink-700)}
.faq-body p{margin:0}

/* ============ 结尾 CTA ============ */
.cta-section{padding:0 0 88px}
.cta-band{
  position:relative;
  display:grid;
  grid-template-columns:1.35fr .9fr;
  gap:40px;
  align-items:center;
  padding:56px;
  background:var(--ink-900);
  color:#FAF6F0;
  border-radius:var(--r-lg);
  overflow:hidden;
}
.cta-band::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--brand)}
.cta-band h2{font-size:30px;line-height:1.4;font-weight:800}
.cta-band p{margin-top:14px;color:rgba(250,246,240,.72);font-size:16px}
.cta-actions{display:flex;flex-direction:column;gap:12px}
.cta-actions .btn{width:100%}
.cta-tel{margin-top:4px;font-size:13px;color:rgba(250,246,240,.6);text-align:center}

/* ============ 空态 ============ */
.empty-state{
  margin:56px 0 88px;
  padding:64px 32px;
  text-align:center;
  background:var(--surface);
  border:1px dashed var(--line);
  border-radius:var(--r-md);
}
.empty-state h1{font-size:26px;font-weight:800}
.empty-state p{margin:14px auto 26px;max-width:520px;color:var(--ink-500);font-size:15px}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:rgba(250,246,240,.78);border-top:4px solid var(--brand);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px 40px;padding-bottom:48px}
.footer-brand .logo-text{color:#FAF6F0}
.footer-brand .logo-sub{background:rgba(224,99,43,.18);color:#F3A57F}
.footer-desc{margin-top:18px;font-size:14px;line-height:1.9;color:rgba(250,246,240,.68);max-width:340px}
.footer-contact{margin-top:20px;display:grid;gap:8px;font-size:14px}
.footer-contact li{display:flex;gap:10px;align-items:baseline;color:rgba(250,246,240,.72)}
.footer-contact strong{color:#FAF6F0;font-weight:600;flex:0 0 auto}
.footer-col h4{font-size:14px;font-weight:600;color:#FAF6F0;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(250,246,240,.72);transition:color .2s ease,transform .2s ease;display:inline-block}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:22px;
  padding-bottom:26px;
  border-top:1px solid rgba(250,246,240,.14);
  font-size:13px;
  color:rgba(250,246,240,.55);
}
.footer-bottom .domain{font-variant-numeric:tabular-nums;letter-spacing:.04em}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,760px);padding-top:40px}
  .article-aside{display:none}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-search{display:none}
  .nav-icon-btn{display:inline-flex}
  .article-title{font-size:34px}
  .section{padding:72px 0}
  .section-title{font-size:26px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{grid-template-columns:1fr;padding:44px 36px}
  .cta-actions{flex-direction:row;flex-wrap:wrap}
  .cta-actions .btn{width:auto;flex:1 1 200px}
  .cta-tel{text-align:left}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  .nav-top{height:56px}
  .nav-tel{display:none}
  .article-title{font-size:28px;line-height:1.4}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:23px;margin-top:34px}
  .article-body h3{font-size:19px}
  .section{padding:56px 0}
  .section-title{font-size:23px}
  .article-head-inner{padding-top:22px}
  .meta-row{gap:8px 14px;font-size:12px}
  .related-grid{grid-template-columns:1fr}
  .faq summary{font-size:15px;padding:15px 18px}
  .faq-body{padding:0 18px 18px;font-size:15px}
  .cta-band{padding:36px 24px;border-radius:var(--r-md)}
  .cta-band h2{font-size:23px}
  .empty-state{margin:36px 0 56px;padding:48px 22px}
}
@media (max-width:519px){
  .container{padding:0 20px}
  .logo-text{font-size:16px}
  .logo-sub{display:none}
  .btn-sm{height:36px;padding:0 14px;font-size:13px}
  .btn{height:46px;padding:0 20px;font-size:14px}
  .breadcrumb .crumb-current{max-width:44vw}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --ink-900:#14100D;
  --ink-700:#3B322B;
  --ink-500:#6B5F55;
  --line:#E7DCD0;
  --bg:#FAF6F0;
  --surface:#FFFFFF;
  --brand:#E0632B;
  --brand-700:#B84A18;
  --brand-050:#FCEDE3;
  --accent:#1E4B45;
  --accent-050:#E4EEEB;
  --ok:#2F7D5F;
  --ok-bg:#E8F3EE;
  --err:#C0392B;
  --err-bg:#FBEDEA;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --sh-1:0 1px 2px rgba(20,16,13,.06),0 8px 24px -12px rgba(20,16,13,.14);
  --sh-2:0 18px 40px -22px rgba(20,16,13,.28);
  --skeleton:#EFE7DC;
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-900);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.tnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* ---------- 导航 ---------- */
.site-header{position:relative;background:var(--surface);border-bottom:1px solid var(--line);z-index:60}
.nav-top{background:var(--surface)}
.nav-top-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:66px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--ink-900);display:inline-flex;align-items:flex-end;justify-content:center;gap:3px;padding:8px}
.logo-mark i{display:block;width:3px;border-radius:2px;background:var(--brand)}
.logo-mark i:nth-child(1){height:7px}
.logo-mark i:nth-child(2){height:14px}
.logo-mark i:nth-child(3){height:10px;background:#FAF6F0}
.logo-text{font-size:19px;font-weight:800;letter-spacing:.5px;color:var(--ink-900);line-height:1.2}
.logo-sub{font-size:11px;font-weight:600;color:var(--ink-500);margin-left:5px;letter-spacing:1px;vertical-align:2px}
.nav-tools{display:flex;align-items:center;gap:14px}
.nav-search{display:flex;align-items:center;gap:8px;width:240px;height:40px;padding:0 12px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--bg);color:var(--ink-500);transition:border-color .2s,background .2s}
.nav-search:focus-within{border-color:var(--brand);background:var(--surface)}
.nav-search input{width:100%;border:0;background:transparent;font-size:13.5px;line-height:1.4;outline:none}
.nav-search input::placeholder{color:var(--ink-500)}
.nav-icon-btn{display:none;width:38px;height:38px;border-radius:var(--r-sm);align-items:center;justify-content:center;color:var(--ink-700);transition:background .2s,color .2s}
.nav-icon-btn:hover{background:var(--brand-050);color:var(--brand-700)}
.nav-tel{font-size:14px;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums;white-space:nowrap}
.nav-tel:hover{color:var(--brand-700)}
.nav-channels{position:sticky;top:0;z-index:50;background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.channels-inner{display:flex;align-items:center;gap:6px;height:50px;overflow-x:auto;scrollbar-width:none}
.channels-inner::-webkit-scrollbar{display:none}
.channel{flex:0 0 auto;display:inline-flex;align-items:center;height:34px;padding:0 15px;border-radius:999px;font-size:14.5px;font-weight:600;color:var(--ink-700);white-space:nowrap;transition:background .2s,color .2s}
.channel:hover{background:var(--brand-050);color:var(--brand-700)}
.channel.is-active{background:var(--brand);color:#fff}
.channel.is-active:hover{background:var(--brand-700);color:#fff}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r-md);font-size:15px;font-weight:700;line-height:1;border:1.5px solid transparent;transition:background .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--accent);color:var(--accent)}
.btn-ghost:hover{background:var(--accent-050)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn-light{background:#FAF6F0;color:var(--ink-900)}
.btn-light:hover{background:#fff;transform:translateY(-1px)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:700;color:var(--brand);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.text-link:hover{color:var(--brand-700);text-decoration-thickness:2px}

/* ---------- 面包屑 & Hero ---------- */
.crumb{font-size:13px;color:var(--ink-500);padding:18px 0 0}
.crumb a:hover{color:var(--brand-700)}
.crumb span.sep{margin:0 8px;color:#C9BCAE}
.page-hero{position:relative;margin-top:16px;border-radius:var(--r-lg);overflow:hidden;min-height:280px;display:flex;align-items:center;background:linear-gradient(100deg,rgba(20,16,13,.88),rgba(20,16,13,.62) 52%,rgba(20,16,13,.24)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;background-color:var(--ink-900)}
.page-hero-inner{padding:44px 44px;max-width:680px}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:1px;color:#F7D9C8;text-transform:uppercase}
.hero-kicker::before{content:"";width:4px;height:14px;background:var(--brand);border-radius:2px;display:inline-block}
.page-hero h1{font-size:40px;line-height:1.3;font-weight:800;color:#fff;margin:14px 0 12px;letter-spacing:.5px}
.page-hero p{font-size:15.5px;line-height:1.85;color:rgba(250,246,240,.86);max-width:560px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-meta span{display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:999px;font-size:12.5px;font-weight:600;color:#FAF6F0;background:rgba(250,246,240,.14);border:1px solid rgba(250,246,240,.22)}

/* ---------- 板块通用 ---------- */
.section{padding:72px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
.section-head h2{font-size:30px;line-height:1.35;font-weight:800;letter-spacing:.3px}
.section-head p{font-size:14.5px;color:var(--ink-500);margin-top:8px;max-width:620px}

/* ---------- 筛选 pill ---------- */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin:32px 0 0;padding-bottom:22px;border-bottom:1px dashed var(--line)}
.filter-bar button{height:38px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:14px;font-weight:600;color:var(--ink-700);transition:background .2s,color .2s,border-color .2s,transform .2s}
.filter-bar button:hover{background:var(--brand-050);border-color:#F3C7AE;color:var(--brand-700);transform:translateY(-1px)}
.filter-bar button.is-on{background:var(--ink-900);border-color:var(--ink-900);color:#FAF6F0}

/* ---------- 内容布局 ---------- */
.layout{display:grid;grid-template-columns:3fr 9fr;gap:32px;align-items:start;margin-top:32px}
.side-nav{position:sticky;top:96px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);padding:20px;box-shadow:var(--sh-1)}
.side-nav h3{font-size:13px;font-weight:700;letter-spacing:1px;color:var(--ink-500);margin-bottom:14px}
.side-nav a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 10px;border-radius:var(--r-sm);font-size:14.5px;font-weight:600;color:var(--ink-700);transition:background .2s,color .2s,padding-left .2s}
.side-nav a:hover{background:var(--brand-050);color:var(--brand-700);padding-left:14px}
.side-nav a em{font-style:normal;font-size:12px;color:var(--ink-500);font-variant-numeric:tabular-nums}
.side-note{margin-top:18px;padding:14px;border-radius:var(--r-sm);background:var(--accent-050);font-size:13px;line-height:1.75;color:var(--accent)}

/* ---------- 设备卡 ---------- */
.group-title{display:flex;align-items:center;gap:12px;margin:0 0 18px;scroll-margin-top:120px}
.group-title h2{font-size:22px;font-weight:800;line-height:1.35}
.group-title .idx{font-size:13px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:1px}
.device-list{display:flex;flex-direction:column;gap:24px;margin-bottom:48px}
.device-card{display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:20px;box-shadow:var(--sh-1);transition:box-shadow .25s,transform .25s,border-color .25s}
.device-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#DCCBBC}
.device-media{border-radius:12px;overflow:hidden;background:var(--skeleton);aspect-ratio:16/10}
.device-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.device-card:hover .device-media img{transform:scale(1.04)}
.device-body h3{font-size:20px;font-weight:800;line-height:1.4;margin:10px 0 6px}
.device-model{font-size:13px;color:var(--ink-500);letter-spacing:.4px;font-variant-numeric:tabular-nums}
.device-points{margin:14px 0 0;display:flex;flex-direction:column;gap:7px}
.device-points li{position:relative;padding-left:16px;font-size:14.5px;line-height:1.75;color:var(--ink-700)}
.device-points li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--accent)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;font-size:12.5px;font-weight:600;background:var(--brand-050);color:var(--brand-700)}
.tag.is-green{background:var(--accent-050);color:var(--accent)}
.tag.is-ink{background:rgba(20,16,13,.07);color:var(--ink-700)}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:700;background:var(--brand-050);color:var(--brand-700)}
.device-foot{margin-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ---------- 指标条 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);padding:28px 24px;box-shadow:var(--sh-1)}
.metric{border-left:1px solid var(--line);padding-left:20px}
.metric:first-child{border-left:0;padding-left:0}
.metric b{display:block;font-size:34px;line-height:1.1;color:var(--accent);font-variant-numeric:tabular-nums;font-weight:800}
.metric b small{font-size:14px;font-weight:700;margin-left:4px;color:var(--ink-700)}
.metric span{display:block;margin-top:8px;font-size:13.5px;color:var(--ink-500);line-height:1.7}

/* ---------- 流程 ---------- */
.steps{display:grid;gap:0;margin-top:8px}
.step{display:grid;grid-template-columns:64px 1fr;gap:20px;position:relative;padding-bottom:34px}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:23px;top:48px;bottom:0;width:1px;background:var(--line)}
.step:last-child::before{display:none}
.step-dot{width:48px;height:48px;border-radius:50%;border:2px solid var(--brand);color:var(--brand-700);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;background:var(--surface);font-variant-numeric:tabular-nums}
.step-body h3{font-size:18px;font-weight:800;margin-top:8px}
.step-body p{font-size:14.5px;color:var(--ink-500);margin-top:6px;max-width:640px}

/* ---------- FAQ ---------- */
.faq{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);overflow:hidden;margin-top:32px}
.faq details{border-bottom:1px solid var(--line)}
.faq details:last-child{border-bottom:0}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:62px;padding:14px 22px;font-size:16px;font-weight:600;color:var(--ink-900);cursor:pointer;list-style:none;transition:background .2s,color .2s}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{background:var(--brand-050)}
.faq details[open] summary{background:var(--brand-050);color:var(--brand-700)}
.faq .ico{flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .25s}
.faq .ico::before,.faq .ico::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.faq .ico::before{left:0;top:10px;width:22px;height:2px}
.faq .ico::after{left:10px;top:0;width:2px;height:22px}
.faq details[open] .ico{transform:rotate(45deg)}
.faq .answer{padding:0 22px 20px;font-size:15.5px;line-height:1.85;color:var(--ink-700)}

/* ---------- CTA ---------- */
.cta{margin-top:72px;background:var(--ink-900);border-radius:var(--r-lg);padding:56px 48px;display:grid;grid-template-columns:6fr 6fr;gap:40px;align-items:center;position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;left:0;top:0;width:100%;height:4px;background:var(--brand)}
.cta h2{font-size:30px;line-height:1.35;color:#FAF6F0;font-weight:800}
.cta p{margin-top:12px;font-size:15px;color:rgba(250,246,240,.74);max-width:460px}
.cta .cta-actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.cta-form{background:rgba(250,246,240,.06);border:1px solid rgba(250,246,240,.16);border-radius:var(--r-md);padding:24px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:600;color:rgba(250,246,240,.8);margin-bottom:6px}
.field label .req{color:var(--brand)}
.field input,.field select,.field textarea{width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);border:1px solid rgba(250,246,240,.22);background:rgba(250,246,240,.06);color:#FAF6F0;font-size:14.5px;outline:none;transition:border-color .2s,background .2s}
.field textarea{height:84px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(250,246,240,.42)}
.field input:focus,.field select:focus,.field textarea:focus{border:2px solid var(--brand);background:rgba(250,246,240,.1)}
.field select option{color:var(--ink-900)}
.form-tip{font-size:12.5px;color:rgba(250,246,240,.55);margin-top:10px;line-height:1.7}
.form-alert{display:none;margin-top:14px;padding:12px 14px;border-radius:var(--r-sm);background:var(--ok-bg);border-left:4px solid var(--ok);color:var(--ok);font-size:13.5px;font-weight:600}
.form-alert.is-show{display:block}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(250,246,240,.72);margin-top:88px;border-top:4px solid var(--brand)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:64px 32px 48px}
.footer-brand .logo-text{color:#FAF6F0}
.footer-brand .logo-sub{color:rgba(250,246,240,.55)}
.footer-brand .logo-mark{background:rgba(250,246,240,.12)}
.footer-desc{font-size:14px;line-height:1.85;margin-top:16px;color:rgba(250,246,240,.66);max-width:340px}
.footer-contact{margin-top:20px;display:flex;flex-direction:column;gap:8px;font-size:13.5px}
.footer-contact li{display:flex;gap:10px;align-items:baseline}
.footer-contact strong{font-weight:600;color:#FAF6F0;flex:0 0 64px}
.footer-col h4{font-size:14px;font-weight:700;color:#FAF6F0;margin-bottom:16px;letter-spacing:.5px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(250,246,240,.72);transition:color .2s,transform .2s}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(250,246,240,.14);padding:20px 32px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;color:rgba(250,246,240,.5)}
.footer-bottom .domain{font-variant-numeric:tabular-nums}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 28px}
  .footer-grid{padding:56px 28px 40px}
  .footer-bottom{padding:18px 28px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-search{display:none}
  .nav-icon-btn{display:inline-flex}
  .nav-tel{display:none}
  .layout{grid-template-columns:1fr}
  .side-nav{position:static;display:grid;grid-template-columns:1fr 1fr;gap:4px 16px}
  .side-nav h3{grid-column:1/-1}
  .side-note{grid-column:1/-1}
  .page-hero-inner{padding:36px 32px}
  .page-hero h1{font-size:34px}
  .metrics{grid-template-columns:1fr 1fr;gap:20px}
  .metric:nth-child(3){border-left:0;padding-left:0}
  .cta{grid-template-columns:1fr;padding:44px 32px;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:767px){
  .device-card{grid-template-columns:1fr;padding:16px}
  .device-media{aspect-ratio:16/9}
  .section{padding:52px 0 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .section-head h2{font-size:24px}
  .cta h2{font-size:24px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:44px 20px 32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;padding:18px 20px}
}
@media (max-width:520px){
  .container{padding:0 20px}
  body{font-size:15.5px}
  .logo-text{font-size:17px}
  .page-hero{min-height:220px;border-radius:var(--r-md)}
  .page-hero-inner{padding:28px 22px}
  .page-hero h1{font-size:28px}
  .page-hero p{font-size:14.5px}
  .metrics{grid-template-columns:1fr;gap:16px;padding:20px}
  .metric{border-left:0;padding-left:0;border-top:1px dashed var(--line);padding-top:16px}
  .metric:first-child{border-top:0;padding-top:0}
  .cta{padding:32px 20px}
  .form-row{grid-template-columns:1fr}
  .step{grid-template-columns:48px 1fr;gap:14px}
  .step-dot{width:40px;height:40px;font-size:14px}
  .step::before{left:19px;top:42px}
  .faq summary{font-size:15px;padding:12px 16px}
  .faq .answer{padding:0 16px 16px;font-size:15px}
  .btn{width:100%}
  .device-foot .btn{width:auto}
}

/* roulang page: category2 */
:root{
  --ink-900:#14100D;
  --ink-700:#3B322B;
  --ink-500:#6B5F55;
  --line:#E7DCD0;
  --bg:#FAF6F0;
  --surface:#FFFFFF;
  --brand:#E0632B;
  --brand-700:#B84A18;
  --brand-050:#FCEDE3;
  --accent:#1E4B45;
  --accent-050:#E4EEEB;
  --success:#2F7D5F;
  --success-bg:#E8F3EE;
  --error:#C0392B;
  --error-bg:#FBEDEA;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --sh-1:0 1px 2px rgba(20,16,13,.06),0 8px 24px -12px rgba(20,16,13,.14);
  --sh-2:0 18px 40px -22px rgba(20,16,13,.28);
  --s1:4px;--s2:8px;--s3:12px;--s4:16px;--s5:24px;--s6:32px;--s7:48px;--s8:64px;--s9:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-900);
  background:var(--bg);
  letter-spacing:0;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.35;letter-spacing:-.01em;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.tnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:var(--s9) 0;}
.section--tight{padding:var(--s8) 0;}
.section--paper{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;line-height:1;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:var(--r-sm);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-secondary{background:transparent;border:1.5px solid var(--accent);color:var(--accent);}
.btn-secondary:hover{background:var(--accent-050);transform:translateY(-1px);}
.btn-secondary:active{transform:translateY(0);}
.btn-light{background:rgba(250,246,240,.14);border:1.5px solid rgba(250,246,240,.42);color:#FAF6F0;}
.btn-light:hover{background:rgba(250,246,240,.24);transform:translateY(-1px);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-weight:600;font-size:15px;
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
  transition:color .18s ease,gap .18s ease;
}
.link-arrow:hover{color:var(--brand-700);gap:10px;text-decoration-thickness:2px;}

/* ---------- header ---------- */
.site-header{background:var(--surface);border-bottom:1px solid var(--line);}
.nav-top{height:64px;display:flex;align-items:center;}
.nav-top-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{display:inline-flex;align-items:flex-end;gap:3px;height:24px;width:26px;}
.logo-mark i{display:block;width:5px;border-radius:2px;background:var(--brand);}
.logo-mark i:nth-child(1){height:11px;}
.logo-mark i:nth-child(2){height:17px;}
.logo-mark i:nth-child(3){height:24px;background:var(--accent);}
.logo-text{font-size:19px;font-weight:800;color:var(--ink-900);letter-spacing:.01em;}
.logo-sub{font-size:11px;font-weight:600;color:var(--brand);margin-left:6px;letter-spacing:.08em;vertical-align:2px;}
.nav-tools{display:flex;align-items:center;gap:14px;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  width:240px;height:38px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-sm);background:var(--bg);
  color:var(--ink-500);
  transition:border-color .18s ease,background-color .18s ease;
}
.nav-search:focus-within{border-color:var(--brand);background:#fff;}
.nav-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px;}
.nav-search input::placeholder{color:#9A8D82;}
.nav-icon-btn{
  display:none;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:var(--r-sm);color:var(--ink-700);
  transition:background-color .18s ease,color .18s ease;
}
.nav-icon-btn:hover{background:var(--brand-050);color:var(--brand-700);}
.nav-icon-btn:active{background:var(--brand-050);}
.nav-tel{font-size:14px;font-weight:600;color:var(--ink-700);font-variant-numeric:tabular-nums;transition:color .18s ease;}
.nav-tel:hover{color:var(--brand);}

.nav-channels{
  position:sticky;top:0;z-index:50;
  background:var(--surface);border-top:1px solid var(--line);
  box-shadow:0 6px 16px -14px rgba(20,16,13,.4);
}
.channels-inner{
  display:flex;align-items:center;gap:6px;
  height:52px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  -webkit-overflow-scrolling:touch;
}
.channels-inner::-webkit-scrollbar{display:none;}
.channel{
  flex:0 0 auto;
  display:inline-flex;align-items:center;height:34px;padding:0 14px;
  border-radius:999px;font-size:14.5px;font-weight:600;color:var(--ink-700);
  transition:background-color .18s ease,color .18s ease;
}
.channel:hover{background:var(--brand-050);color:var(--brand-700);}
.channel.is-active{background:var(--brand);color:#fff;}
.channel.is-active:hover{background:var(--brand-700);color:#fff;}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  background-image:linear-gradient(100deg,rgba(20,16,13,.88),rgba(20,16,13,.62) 50%,rgba(20,16,13,.34)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  color:#FAF6F0;
  padding:56px 0;
  min-height:280px;
  display:flex;align-items:center;
  scroll-margin-top:120px;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(250,246,240,.72);margin-bottom:18px;flex-wrap:wrap;}
.breadcrumb a{transition:color .18s ease;}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.breadcrumb span.sep{color:rgba(250,246,240,.4);}
.page-hero h1{font-size:40px;font-weight:800;max-width:780px;letter-spacing:-.015em;}
.page-hero h1 em{font-style:normal;color:var(--brand);}
.hero-lead{max-width:640px;margin-top:16px;font-size:16.5px;line-height:1.8;color:rgba(250,246,240,.86);}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px;}
.hero-tags span{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;
  background:rgba(250,246,240,.14);border:1px solid rgba(250,246,240,.28);color:#FAF6F0;
}

/* ---------- section head ---------- */
.section-head{max-width:720px;margin-bottom:var(--s7);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--brand-700);letter-spacing:.06em;
  margin-bottom:14px;
}
.eyebrow::before{content:"";display:block;width:4px;height:16px;border-radius:2px;background:var(--brand);}
.h2{font-size:31px;font-weight:800;color:var(--ink-900);}
.section-lead{margin-top:14px;color:var(--ink-500);font-size:16.5px;line-height:1.85;max-width:680px;}

/* ---------- feature rows ---------- */
.feature-row{
  display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center;
  padding:var(--s6) 0;
  border-bottom:1px dashed var(--line);
}
.feature-row:first-of-type{border-top:1px dashed var(--line);}
.feature-row:nth-child(even) .feature-media{order:2;}
.feature-media{grid-column:span 6;}
.feature-body{grid-column:span 5;}
.feature-row:nth-child(even) .feature-body{grid-column:span 5;grid-column-start:7;}
.feature-media figure{margin:0;}
.feature-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);
  background:#EFE7DC;box-shadow:var(--sh-1);
  transition:transform .4s ease,box-shadow .4s ease;
}
.feature-media{overflow:hidden;border-radius:var(--r-lg);}
.feature-media:hover img{transform:scale(1.03);box-shadow:var(--sh-2);}
.feature-media figcaption{font-size:12.5px;color:var(--ink-500);margin-top:10px;}
.feature-num{
  display:inline-block;font-size:13px;font-weight:800;color:var(--brand);
  font-variant-numeric:tabular-nums;letter-spacing:.1em;margin-bottom:10px;
}
.feature-body h3{font-size:22px;font-weight:800;color:var(--ink-900);margin-bottom:12px;}
.feature-body p{color:var(--ink-500);font-size:16px;}
.feature-list{margin:18px 0 22px;display:grid;gap:10px;}
.feature-list li{position:relative;padding-left:22px;font-size:15.5px;color:var(--ink-700);line-height:1.7;}
.feature-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;
  background:var(--accent-050);border:2px solid var(--accent);
}
.param-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
  font-size:12.5px;font-weight:600;line-height:1;
}
.tag-brand{background:var(--brand-050);color:var(--brand-700);}
.tag-accent{background:var(--accent-050);color:var(--accent);}
.tag-ink{background:rgba(20,16,13,.07);color:var(--ink-700);}

/* ---------- stat strip ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden;
}
.stat-item{padding:28px 26px;border-left:1px solid var(--line);}
.stat-item:first-child{border-left:0;}
.stat-num{
  display:flex;align-items:baseline;gap:4px;
  font-size:40px;font-weight:800;color:var(--accent);line-height:1.1;
  font-variant-numeric:tabular-nums;
}
.stat-num small{font-size:15px;font-weight:700;color:var(--accent);}
.stat-label{margin-top:8px;font-size:13.5px;color:var(--ink-500);line-height:1.7;}

/* ---------- timeline ---------- */
.timeline{position:relative;display:grid;gap:0;max-width:860px;}
.tl-item{position:relative;display:grid;grid-template-columns:64px 1fr;gap:20px;padding-bottom:34px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:15px;top:36px;bottom:0;width:1px;background:var(--line);
}
.tl-item:last-child::before{display:none;}
.tl-num{
  width:32px;height:32px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:2px solid var(--brand);background:var(--surface);
  font-size:13px;font-weight:800;color:var(--brand-700);
  font-variant-numeric:tabular-nums;
  position:relative;z-index:1;
}
.tl-body{padding-top:2px;}
.tl-body h3{font-size:19px;font-weight:800;margin-bottom:8px;}
.tl-body p{color:var(--ink-500);font-size:15.5px;line-height:1.8;margin:0;}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}

/* ---------- compare ---------- */
.compare{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  background:var(--surface);box-shadow:var(--sh-1);
}
.compare-col{padding:26px 28px;}
.compare-col + .compare-col{border-left:1px solid var(--line);background:linear-gradient(180deg,#fff, #FDFAF6);}
.compare-head{
  font-size:14px;font-weight:800;letter-spacing:.04em;margin-bottom:6px;
}
.compare-col:first-child .compare-head{color:var(--ink-500);}
.compare-col:last-child .compare-head{color:var(--accent);}
.compare-sub{font-size:13px;color:var(--ink-500);margin-bottom:18px;}
.compare-row{
  padding:14px 0;border-top:1px dashed var(--line);
  font-size:15.5px;line-height:1.75;
}
.compare-row:first-of-type{border-top:0;}
.compare-col:first-child .compare-row{color:var(--ink-500);}
.compare-col:last-child .compare-row{color:var(--ink-900);font-weight:600;}
.compare-row b{display:block;font-size:13px;font-weight:700;color:#9A8D82;margin-bottom:2px;letter-spacing:.04em;}
.compare-col:last-child .compare-row b{color:var(--accent);}

/* ---------- faq ---------- */
.faq{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:var(--surface);}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:60px;padding:16px 22px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--ink-900);
  transition:background-color .18s ease,color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:var(--brand-050);color:var(--brand-700);}
.faq-item[open] summary{background:var(--brand-050);color:var(--brand-700);}
.faq-icon{
  flex:0 0 auto;position:relative;width:16px;height:16px;
  transition:transform .22s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px;}
.faq-icon::after{left:7px;top:0;width:2px;height:16px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-a{padding:0 22px 20px;font-size:15.5px;line-height:1.85;color:var(--ink-500);}
.faq-a p{margin:0;}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--ink-900);color:#FAF6F0;
  padding:var(--s9) 0;
  scroll-margin-top:120px;
}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.cta-band h2{font-size:31px;font-weight:800;color:#FAF6F0;letter-spacing:-.015em;}
.cta-band h2 em{font-style:normal;color:var(--brand);}
.cta-desc{margin-top:16px;color:rgba(250,246,240,.74);font-size:16px;max-width:460px;}
.cta-points{margin-top:26px;display:grid;gap:12px;}
.cta-points li{position:relative;padding-left:24px;font-size:15px;color:rgba(250,246,240,.86);}
.cta-points li::before{
  content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:2px;
  background:var(--brand);
}
.cta-tel-line{margin-top:28px;font-size:14px;color:rgba(250,246,240,.64);}
.cta-tel-line a{color:#FAF6F0;font-weight:700;font-variant-numeric:tabular-nums;text-decoration:underline;text-underline-offset:4px;}
.cta-tel-line a:hover{color:var(--brand);}

.cta-form{
  background:rgba(250,246,240,.05);
  border:1px solid rgba(250,246,240,.16);
  border-radius:var(--r-lg);padding:28px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;}
.field label{font-size:13px;font-weight:600;color:rgba(250,246,240,.82);}
.field .req{color:var(--brand);margin-left:3px;}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  background:rgba(250,246,240,.08);
  border:1px solid rgba(250,246,240,.22);
  color:#FAF6F0;font-size:15px;outline:none;
  transition:border-color .18s ease,background-color .18s ease;
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:rgba(250,246,240,.4);}
.field input:hover,.field select:hover,.field textarea:hover{border-color:rgba(250,246,240,.4);}
.field input:focus,.field select:focus,.field textarea:focus{border:2px solid var(--brand);background:rgba(250,246,240,.12);}
.field select option{color:#14100D;}
.form-note{font-size:12.5px;color:rgba(250,246,240,.5);margin-top:4px;}
.form-msg{
  display:none;margin-top:16px;padding:12px 16px;border-radius:var(--r-sm);
  font-size:14px;line-height:1.7;
  background:var(--success-bg);color:var(--success);border-left:4px solid var(--success);
}
.form-msg.is-show{display:block;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:#FAF6F0;border-top:4px solid var(--brand);}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding:64px 32px 48px;
}
.footer-brand .logo-text{color:#FAF6F0;}
.footer-brand .logo-sub{color:var(--brand);}
.footer-desc{
  margin-top:18px;font-size:14px;line-height:1.85;
  color:rgba(250,246,240,.72);max-width:340px;
}
.footer-contact{margin-top:22px;display:grid;gap:8px;}
.footer-contact li{font-size:14px;color:rgba(250,246,240,.72);display:flex;gap:10px;flex-wrap:wrap;}
.footer-contact li strong{color:#FAF6F0;font-weight:600;min-width:64px;}
.footer-col h4{font-size:14px;font-weight:600;color:#FAF6F0;margin-bottom:16px;letter-spacing:.04em;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{
  font-size:14px;color:rgba(250,246,240,.72);
  display:inline-block;transition:color .18s ease,transform .18s ease;
}
.footer-col a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 32px 28px;margin-top:0;
  border-top:1px solid rgba(250,246,240,.14);
  font-size:13px;color:rgba(250,246,240,.54);
}
.footer-bottom .domain{font-variant-numeric:tabular-nums;letter-spacing:.04em;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 28px;}
  .page-hero h1{font-size:36px;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .nav-search{width:190px;}
  .nav-tel{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .feature-row{grid-template-columns:1fr;gap:20px;padding:36px 0;}
  .feature-media,.feature-body,
  .feature-row:nth-child(even) .feature-body{grid-column:1 / -1;grid-column-start:auto;order:0;}
  .feature-row:nth-child(even) .feature-media{order:0;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(3){border-left:0;}
  .stat-item:nth-child(n+3){border-top:1px solid var(--line);}
  .cta-grid{grid-template-columns:1fr;gap:36px;}
  .compare{grid-template-columns:1fr;}
  .compare-col + .compare-col{border-left:0;border-top:1px solid var(--line);}
  .page-hero{min-height:240px;padding:44px 0;}
  .page-hero h1{font-size:33px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .nav-top{height:56px;}
  .nav-search{display:none;}
  .nav-icon-btn{display:inline-flex;}
  .nav-tools{gap:8px;}
  .logo-text{font-size:17px;}
  .section{padding:56px 0;}
  .h2,.cta-band h2{font-size:24px;}
  .page-hero h1{font-size:29px;}
  .hero-lead{font-size:15.5px;}
  .stat-item{padding:22px 18px;}
  .stat-num{font-size:32px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:48px 20px 36px;}
  .footer-bottom{padding:18px 20px 24px;flex-direction:column;align-items:flex-start;}
  .form-row{grid-template-columns:1fr;}
  .cta-form{padding:20px;}
  .faq-item summary{font-size:15px;padding:14px 16px;}
  .faq-a{padding:0 16px 18px;font-size:15px;}
  .timeline{max-width:none;}
  .tl-item{grid-template-columns:44px 1fr;gap:12px;}
  .tl-item::before{left:15px;}
}
@media (max-width:519px){
  .stat-strip{grid-template-columns:1fr;}
  .stat-item{border-left:0 !important;}
  .stat-item + .stat-item{border-top:1px solid var(--line);}
  .btn{height:44px;padding:0 18px;font-size:14.5px;}
  .hero-tags span{font-size:12px;padding:0 10px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category3 */
:root{
  --ink-900:#14100D;
  --ink-700:#3B322B;
  --ink-500:#6B5F55;
  --line:#E7DCD0;
  --bg:#FAF6F0;
  --surface:#FFFFFF;
  --brand:#E0632B;
  --brand-700:#B84A18;
  --brand-050:#FCEDE3;
  --accent:#1E4B45;
  --accent-050:#E4EEEB;
  --success:#2F7D5F;
  --success-bg:#E8F3EE;
  --danger:#C0392B;
  --danger-bg:#FBEDEA;
  --muted-bg:#EFE7DC;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --sh-1:0 1px 2px rgba(20,16,13,.06),0 8px 24px -12px rgba(20,16,13,.14);
  --sh-2:0 18px 40px -22px rgba(20,16,13,.28);
  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:64px;--sp-9:88px;
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",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:1.85;
  color:var(--ink-900);
  background:var(--bg);
  letter-spacing:0;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-700)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:16px;color:var(--ink-900)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 32px}
.tnum{font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  border:1.5px solid transparent;cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .18s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--accent);border-color:var(--accent)}
.btn-ghost:hover{background:var(--accent-050);color:var(--accent)}
.btn-light{background:transparent;color:#FAF6F0;border-color:rgba(250,246,240,.55)}
.btn-light:hover{background:rgba(250,246,240,.14);color:#fff;border-color:#FAF6F0}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:var(--r-sm)}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
}
.link-arrow:hover{text-decoration-thickness:2px;color:var(--brand-700)}

/* ---------- 头部导航 ---------- */
.site-header{position:relative;background:var(--surface);border-bottom:1px solid var(--line);z-index:60}
.nav-top{background:var(--surface)}
.nav-top-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink-900);font-weight:800;font-size:19px;letter-spacing:.01em}
.logo:hover{color:var(--ink-900)}
.logo-mark{display:inline-flex;align-items:flex-end;gap:3px;width:26px;height:26px;flex:0 0 auto}
.logo-mark i{display:block;width:6px;border-radius:2px;background:var(--brand)}
.logo-mark i:nth-child(1){height:10px}
.logo-mark i:nth-child(2){height:17px;background:var(--accent)}
.logo-mark i:nth-child(3){height:24px}
.logo-text{white-space:nowrap}
.logo-sub{font-size:11px;font-weight:600;color:var(--ink-500);margin-left:4px;letter-spacing:.08em}
.nav-tools{display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;align-items:center;gap:8px;width:220px;height:40px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-sm);background:var(--bg);color:var(--ink-500);
  transition:border-color .2s ease,background-color .2s ease;
}
.nav-search:focus-within{border-color:var(--brand);background:var(--surface)}
.nav-search input{flex:1;border:0;background:transparent;outline:none;font-size:14px;color:var(--ink-900);min-width:0}
.nav-search input::placeholder{color:var(--ink-500)}
.nav-icon-btn{
  display:none;align-items:center;justify-content:center;width:36px;height:36px;
  border:1px solid var(--line);border-radius:var(--r-sm);background:transparent;color:var(--ink-700);
  transition:background-color .2s ease,color .2s ease;
}
.nav-icon-btn:hover{background:var(--brand-050);color:var(--brand-700)}
.nav-tel{font-size:14px;font-weight:600;color:var(--ink-700);font-variant-numeric:tabular-nums;white-space:nowrap}
.nav-tel:hover{color:var(--brand-700)}

.nav-channels{
  position:sticky;top:0;z-index:50;
  background:var(--surface);border-bottom:1px solid var(--line);
  box-shadow:0 6px 18px -16px rgba(20,16,13,.5);
}
.channels-inner{
  display:flex;align-items:center;gap:6px;height:52px;
  overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  scroll-behavior:smooth;
}
.channels-inner::-webkit-scrollbar{display:none}
.channel{
  flex:0 0 auto;display:inline-flex;align-items:center;
  height:36px;padding:0 16px;border-radius:999px;
  font-size:15px;font-weight:600;color:var(--ink-700);white-space:nowrap;
  transition:background-color .2s ease,color .2s ease;
}
.channel:hover{background:var(--brand-050);color:var(--brand-700)}
.channel.is-active{background:var(--brand);color:#fff}
.channel.is-active:hover{background:var(--brand-700);color:#fff}

/* ---------- 面包屑 ---------- */
.crumb-bar{background:var(--surface);border-bottom:1px solid var(--line)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:14px 0;font-size:13px;color:var(--ink-500)}
.crumb a{color:var(--ink-500)}
.crumb a:hover{color:var(--brand-700)}
.crumb span.sep{color:#B8AFA6}
.crumb .current{color:var(--ink-700);font-weight:600}

/* ---------- 矮 Hero ---------- */
.page-hero{
  position:relative;isolate;overflow:hidden;
  background-image:linear-gradient(100deg,rgba(20,16,13,.86),rgba(20,16,13,.62) 52%,rgba(20,16,13,.34)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  color:#FAF6F0;
}
.page-hero-inner{padding:64px 0 60px;max-width:720px}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.12em;
  color:#F6C6AC;text-transform:uppercase;margin-bottom:16px;
}
.hero-kicker::before{content:"";display:block;width:4px;height:16px;background:var(--brand);border-radius:2px}
.page-hero h1{
  font-size:42px;line-height:1.28;font-weight:800;letter-spacing:.01em;color:#fff;
  max-width:760px;
}
.page-hero .hero-sub{
  margin-top:14px;font-size:18px;line-height:1.7;color:rgba(250,246,240,.86);max-width:600px;
}
.page-hero .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  background:rgba(250,246,240,.12);border:1px solid rgba(250,246,240,.26);
  font-size:13px;color:rgba(250,246,240,.9);
}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0}
.section.tight{padding:64px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--brand-700);
  margin-bottom:14px;
}
.eyebrow::before{content:"";display:block;width:4px;height:15px;background:var(--brand);border-radius:2px}
h2.section-title{font-size:30px;line-height:1.35;font-weight:800;color:var(--ink-900)}
.section-desc{margin-top:14px;font-size:16px;color:var(--ink-500);line-height:1.85;max-width:700px}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- 指标条 ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden;margin-top:-40px;position:relative;z-index:5;
}
.metric{padding:28px 26px;border-left:1px solid var(--line)}
.metric:first-child{border-left:0}
.metric-num{font-size:34px;font-weight:800;color:var(--accent);line-height:1.1;font-variant-numeric:tabular-nums}
.metric-num small{font-size:15px;font-weight:700;margin-left:3px;color:var(--accent)}
.metric-label{margin-top:8px;font-size:13px;color:var(--ink-500);line-height:1.6}

/* ---------- 时间轴流程 ---------- */
.timeline{margin-top:8px;max-width:900px}
.tl-item{
  position:relative;display:grid;grid-template-columns:56px 1fr;gap:24px;
  padding-bottom:34px;
}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:19px;top:40px;bottom:0;width:1px;background:var(--line);
}
.tl-item:last-child::before{display:none}
.tl-dot{
  width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1.5px solid var(--brand);background:var(--surface);
  color:var(--brand-700);font-size:14px;font-weight:800;font-variant-numeric:tabular-nums;
}
.tl-body{padding-top:4px}
.tl-body h3{font-size:20px;font-weight:700;color:var(--ink-900);line-height:1.4}
.tl-body p{margin-top:8px;font-size:15px;color:var(--ink-500);line-height:1.8;max-width:660px}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;
  padding:4px 11px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1.6;white-space:nowrap;
}
.tag-brand{background:var(--brand-050);color:var(--brand-700)}
.tag-accent{background:var(--accent-050);color:var(--accent)}
.tag-ink{background:rgba(20,16,13,.07);color:var(--ink-700)}

/* ---------- 服务卡（横向） ---------- */
.svc-list{display:grid;gap:20px}
.svc-card{
  display:grid;grid-template-columns:5fr 7fr;gap:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:box-shadow .28s ease,transform .28s ease,border-color .28s ease;
}
.svc-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#DCCDBB}
.svc-media{position:relative;background:var(--muted-bg);aspect-ratio:16/10;overflow:hidden}
.svc-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.svc-card:hover .svc-media img{transform:scale(1.03)}
.svc-body{padding:30px 32px;display:flex;flex-direction:column;justify-content:center;gap:12px}
.svc-body h3{font-size:22px;font-weight:700;line-height:1.4;color:var(--ink-900)}
.svc-body p{font-size:15px;color:var(--ink-500);line-height:1.8}
.svc-points{display:grid;gap:8px;margin-top:2px}
.svc-points li{position:relative;padding-left:18px;font-size:14.5px;color:var(--ink-700);line-height:1.7}
.svc-points li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;
  border-radius:50%;background:var(--brand);
}

/* ---------- 案例卡 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.case-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:box-shadow .28s ease,transform .28s ease;
}
.case-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.case-media{position:relative;aspect-ratio:4/3;background:var(--muted-bg);overflow:hidden}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.case-card:hover .case-media img{transform:scale(1.03)}
.case-media .tag{position:absolute;left:14px;top:14px}
.case-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.case-body h3{font-size:19px;font-weight:700;line-height:1.45;color:var(--ink-900)}
.case-figure{font-size:28px;font-weight:800;color:var(--accent);line-height:1.2;font-variant-numeric:tabular-nums}
.case-figure span{font-size:13px;font-weight:600;color:var(--ink-500);margin-left:6px}
.case-quote{font-size:14.5px;color:var(--ink-500);line-height:1.8;flex:1}
.case-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:6px;border-top:1px dashed var(--line);margin-top:4px}
.case-foot time{font-size:13px;color:var(--ink-500)}

/* ---------- FAQ ---------- */
.faq{max-width:900px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);overflow:hidden}
.faq-item{border-top:1px solid var(--line)}
.faq-item:first-child{border-top:0}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;min-height:60px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--ink-900);
  transition:background-color .2s ease,color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--brand-050);color:var(--brand-700)}
.faq-item[open] summary{background:var(--brand-050);color:var(--brand-700)}
.faq-icon{
  position:relative;flex:0 0 auto;width:20px;height:20px;border-radius:50%;
  border:1.5px solid currentColor;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:9px;height:1.5px}
.faq-icon::after{width:1.5px;height:9px;transition:transform .25s ease,opacity .25s ease}
.faq-item[open] .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-answer{padding:0 24px 22px;font-size:15.5px;line-height:1.85;color:var(--ink-700)}

/* ---------- CTA + 表单 ---------- */
.cta-band{background:var(--ink-900);color:#FAF6F0;border-top:4px solid var(--brand)}
.cta-inner{display:grid;grid-template-columns:5fr 7fr;gap:56px;padding:84px 0;align-items:start}
.cta-copy h2{font-size:30px;line-height:1.35;font-weight:800;color:#fff}
.cta-copy p{margin-top:16px;font-size:15.5px;line-height:1.85;color:rgba(250,246,240,.76)}
.cta-contact{margin-top:26px;display:grid;gap:12px}
.cta-contact li{display:flex;gap:12px;font-size:14px;color:rgba(250,246,240,.8)}
.cta-contact strong{color:#fff;font-weight:600;flex:0 0 76px}
.form-card{
  background:rgba(250,246,240,.06);border:1px solid rgba(250,246,240,.16);
  border-radius:var(--r-lg);padding:30px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field.full{grid-column:1 / -1}
.field label{font-size:13px;font-weight:600;color:rgba(250,246,240,.86)}
.field label .req{color:var(--brand);margin-left:3px}
.field input,.field select,.field textarea{
  height:48px;padding:0 14px;border-radius:var(--r-sm);
  background:rgba(250,246,240,.08);border:1px solid rgba(250,246,240,.24);
  color:#FAF6F0;outline:none;
  transition:border-color .2s ease,background-color .2s ease;
}
.field textarea{height:auto;min-height:104px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(250,246,240,.45)}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#C9BDB0 50%),linear-gradient(135deg,#C9BDB0 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);background:rgba(250,246,240,.12)}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:6px}
.form-hint{font-size:12.5px;color:rgba(250,246,240,.55);line-height:1.6}
.form-note{
  display:none;margin-top:18px;padding:12px 16px;border-radius:var(--r-sm);
  font-size:14px;line-height:1.7;border-left:4px solid var(--success);
  background:var(--success-bg);color:#1D5843;
}
.form-note.show{display:block}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:#FAF6F0;border-top:4px solid var(--brand)}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;
  padding:64px 0 48px;
}
.footer-brand .logo{color:#fff;font-size:18px}
.footer-brand .logo:hover{color:#fff}
.footer-brand .logo-sub{color:rgba(250,246,240,.6)}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(250,246,240,.72);max-width:330px}
.footer-contact{margin-top:20px;display:grid;gap:10px}
.footer-contact li{display:flex;gap:12px;font-size:13.5px;color:rgba(250,246,240,.72)}
.footer-contact strong{color:rgba(250,246,240,.94);font-weight:600;flex:0 0 64px}
.footer-col h4{font-size:14px;font-weight:600;color:#FAF6F0;margin-bottom:16px;letter-spacing:.04em}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:rgba(250,246,240,.72);transition:color .2s ease,transform .2s ease;display:inline-block}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 26px;border-top:1px solid rgba(250,246,240,.16);
  font-size:13px;color:rgba(250,246,240,.6);
}
.footer-bottom .domain{font-variant-numeric:tabular-nums;letter-spacing:.04em}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1140px}
}
@media (max-width:1023px){
  .nav-search{display:none}
  .nav-icon-btn{display:inline-flex}
  .nav-tel{display:none}
  .section{padding:72px 0}
  .page-hero h1{font-size:34px}
  .page-hero-inner{padding:56px 0 52px}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric{border-left:1px solid var(--line)}
  .metric:nth-child(odd){border-left:0}
  .metric:nth-child(n+3){border-top:1px solid var(--line)}
  .svc-card{grid-template-columns:1fr}
  .svc-media{aspect-ratio:16/9}
  .cta-inner{grid-template-columns:1fr;gap:36px;padding:64px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;padding:52px 0 36px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .case-grid{grid-template-columns:1fr}
}
@media (max-width:639px){
  .container{padding:0 20px}
  .nav-top-inner{height:56px;gap:12px}
  .logo{font-size:16px}
  .logo-mark{width:22px;height:22px}
  .logo-mark i{width:5px}
  .logo-mark i:nth-child(1){height:8px}
  .logo-mark i:nth-child(2){height:14px}
  .logo-mark i:nth-child(3){height:20px}
  .logo-sub{font-size:10px}
  .nav-tools{gap:8px}
  .btn-sm{height:36px;padding:0 14px;font-size:13px}
  .channels-inner{height:48px;gap:4px}
  .channel{height:32px;padding:0 13px;font-size:14px}
  .section{padding:56px 0}
  .page-hero-inner{padding:40px 0 44px}
  .page-hero h1{font-size:28px;line-height:1.32}
  .page-hero .hero-sub{font-size:15.5px;margin-top:12px}
  .hero-actions{gap:10px;margin-top:22px}
  .hero-actions .btn{flex:1 1 100%}
  .hero-badge{font-size:12px;padding:5px 11px}
  h2.section-title{font-size:24px}
  .section-desc{font-size:15px}
  .section-head{margin-bottom:30px}
  .metrics{margin-top:-28px;grid-template-columns:1fr 1fr}
  .metric{padding:20px 16px}
  .metric-num{font-size:26px}
  .metric-num small{font-size:13px}
  .metric-label{font-size:12px}
  .tl-item{grid-template-columns:40px 1fr;gap:16px;padding-bottom:28px}
  .tl-dot{width:32px;height:32px;font-size:12px}
  .tl-item::before{left:15px;top:34px}
  .tl-body h3{font-size:17px}
  .tl-body p{font-size:14.5px}
  .svc-body{padding:22px 20px}
  .svc-body h3{font-size:19px}
  .case-body{padding:20px}
  .case-figure{font-size:24px}
  .faq-item summary{padding:16px 18px;font-size:15px;min-height:56px}
  .faq-answer{padding:0 18px 18px;font-size:15px}
  .cta-inner{padding:52px 0;gap:28px}
  .cta-copy h2{font-size:24px}
  .form-card{padding:22px 18px}
  .form-row{grid-template-columns:1fr}
  .form-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:44px 0 28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;font-size:12px}
}

/* roulang page: category5 */
:root{
  --ink-900:#14100D;--ink-700:#3B322B;--ink-500:#6B5F55;
  --line:#E7DCD0;--bg:#FAF6F0;--surface:#FFFFFF;
  --brand:#E0632B;--brand-700:#B84A18;--brand-050:#FCEDE3;
  --accent:#1E4B45;--accent-050:#E4EEEB;
  --ok:#2F7D5F;--ok-bg:#E8F3EE;--err:#C0392B;--err-bg:#FBEDEA;
  --r-sm:8px;--r-md:14px;--r-lg:22px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(20,16,13,.06),0 8px 24px -12px rgba(20,16,13,.14);
  --sh-2:0 18px 40px -22px rgba(20,16,13,.28);
  --sans:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink-900);font-family:var(--sans);font-size:16px;line-height:1.85;letter-spacing:0;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.32;letter-spacing:0}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.tnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- 顶部导航 ---------- */
.site-header{background:var(--surface);border-bottom:1px solid var(--line)}
.nav-top-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{display:inline-flex;align-items:flex-end;gap:3px;height:22px;width:24px}
.logo-mark i{display:block;width:6px;background:var(--brand);border-radius:2px}
.logo-mark i:nth-child(1){height:10px}
.logo-mark i:nth-child(2){height:16px}
.logo-mark i:nth-child(3){height:22px;background:var(--accent)}
.logo-text{font-size:19px;font-weight:800;color:var(--ink-900);letter-spacing:.01em}
.logo-sub{margin-left:6px;font-size:12px;font-weight:600;color:var(--ink-500);letter-spacing:.12em}
.nav-tools{display:flex;align-items:center;gap:14px}
.nav-search{display:flex;align-items:center;gap:8px;width:236px;height:38px;padding:0 12px;background:var(--bg);border:1px solid var(--line);border-radius:var(--r-pill);color:var(--ink-500);transition:border-color .2s,background .2s}
.nav-search:focus-within{border-color:var(--brand);background:var(--surface)}
.nav-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:13px;color:var(--ink-900)}
.nav-search input::placeholder{color:#9A8F84}
.nav-icon-btn{display:none;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--line);background:var(--surface);border-radius:var(--r-sm);color:var(--ink-700);transition:background .2s,color .2s,border-color .2s}
.nav-icon-btn:hover{background:var(--brand-050);color:var(--brand-700);border-color:#F3C9AE}
.nav-tel{font-size:14px;font-weight:700;color:var(--accent);white-space:nowrap;font-variant-numeric:tabular-nums}
.nav-tel:hover{color:var(--brand-700)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border:1.5px solid transparent;border-radius:var(--r-md);font-size:15px;font-weight:700;transition:background .2s,color .2s,transform .2s,border-color .2s,box-shadow .2s;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;border-color:var(--accent);color:var(--accent)}
.btn-ghost:hover{background:var(--accent-050);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-light{background:var(--surface);color:var(--ink-900);border-color:var(--surface)}
.btn-light:hover{background:var(--brand-050);color:var(--brand-700);transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:var(--r-sm)}
.btn-block{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

.nav-channels{position:sticky;top:0;z-index:50;background:var(--surface);border-top:1px solid var(--line);box-shadow:0 6px 18px -16px rgba(20,16,13,.5)}
.channels-inner{display:flex;align-items:center;gap:6px;height:52px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.channels-inner::-webkit-scrollbar{display:none}
.channel{flex:none;display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-pill);font-size:14px;font-weight:600;color:var(--ink-700);white-space:nowrap;transition:background .2s,color .2s}
.channel:hover{background:var(--brand-050);color:var(--brand-700)}
.channel.is-active{background:var(--brand);color:#fff}

/* ---------- Hero ---------- */
.page-hero{position:relative;min-height:320px;display:flex;align-items:center;color:#fff;background-image:linear-gradient(100deg,rgba(20,16,13,.86),rgba(20,16,13,.62) 52%,rgba(20,16,13,.34)),url("/assets/images/backpic/back-2.webp");background-size:cover;background-position:center}
.page-hero-inner{padding:52px 0;max-width:720px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(250,246,240,.72);margin-bottom:18px}
.crumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.crumb span[aria-current]{color:#F3C9AE}
.crumb .sep{opacity:.5}
.page-hero h1{font-size:40px;line-height:1.25;color:#fff}
.page-hero .hero-sub{margin-top:16px;font-size:17px;color:rgba(250,246,240,.86);max-width:600px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-actions .btn-ghost{border-color:rgba(250,246,240,.66);color:#FAF6F0}
.hero-actions .btn-ghost:hover{background:rgba(250,246,240,.14);color:#fff}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{font-size:31px;color:var(--ink-900)}
.section-head p{margin-top:14px;font-size:16px;color:var(--ink-500)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand-700);letter-spacing:.06em;margin-bottom:14px}
.eyebrow::before{content:"";display:block;width:4px;height:16px;background:var(--brand);border-radius:2px}
[id]{scroll-margin-top:120px}

/* ---------- 服务承诺 ---------- */
.promise-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.promise{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:32px 28px;box-shadow:var(--sh-1);transition:transform .25s,box-shadow .25s,border-color .25s}
.promise:nth-child(2){margin-top:32px}
.promise:nth-child(3){margin-top:12px}
.promise:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#F0D6C6}
.promise-num{display:block;font-size:34px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1;margin-bottom:18px}
.promise h3{font-size:20px;color:var(--ink-900);margin-bottom:12px}
.promise p{font-size:15px;color:var(--ink-500);margin:0}

/* ---------- 报修四步 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{position:relative;padding-top:24px;border-top:2px solid var(--line)}
.step::before{content:"";position:absolute;top:-2px;left:0;width:44px;height:2px;background:var(--brand)}
.step-index{font-size:13px;font-weight:700;color:var(--brand-700);letter-spacing:.08em;font-variant-numeric:tabular-nums}
.step h3{font-size:19px;margin:10px 0 10px}
.step p{font-size:14.5px;color:var(--ink-500);margin:0}

/* ---------- 深色指标区 ---------- */
.dark-block{background:var(--ink-900);color:#FAF6F0;border-radius:var(--r-lg);padding:56px;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.dark-block h2{font-size:30px;color:#FAF6F0}
.dark-block .dark-sub{margin-top:14px;font-size:15.5px;color:rgba(250,246,240,.72);max-width:520px}
.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 24px;margin-top:34px}
.metric{border-left:1px solid rgba(250,246,240,.2);padding-left:18px}
.metric strong{display:block;font-size:34px;font-weight:800;line-height:1.1;color:#8FC7B7;font-variant-numeric:tabular-nums}
.metric strong em{font-style:normal;font-size:15px;color:rgba(250,246,240,.7);margin-left:6px;font-weight:600}
.metric span{display:block;margin-top:10px;font-size:13.5px;color:rgba(250,246,240,.66);line-height:1.6}
.dark-figure{margin:0}
.dark-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-md);background:#EFE7DC}
.dark-figure figcaption{margin-top:12px;font-size:12.5px;color:rgba(250,246,240,.55)}

/* ---------- 目录 + FAQ ---------- */
.split{display:grid;grid-template-columns:repeat(12,1fr);gap:32px;align-items:start}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.toc{position:sticky;top:120px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:22px;box-shadow:var(--sh-1)}
.toc h3{font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--ink-500);margin-bottom:14px}
.toc a{display:block;padding:10px 12px;border-radius:var(--r-sm);font-size:14.5px;font-weight:600;color:var(--ink-700);transition:background .2s,color .2s,padding-left .2s}
.toc a:hover{background:var(--brand-050);color:var(--brand-700);padding-left:18px}
.toc-note{margin-top:18px;padding-top:18px;border-top:1px dashed var(--line);font-size:13px;color:var(--ink-500);line-height:1.75}
.toc-note strong{color:var(--accent);font-variant-numeric:tabular-nums}

.faq{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);overflow:hidden;box-shadow:var(--sh-1)}
.faq-item+.faq-item{border-top:1px solid var(--line)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:64px;padding:18px 24px;font-size:16.5px;font-weight:700;color:var(--ink-900);cursor:pointer;list-style:none;transition:background .2s,color .2s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--brand-050);color:var(--brand-700)}
.faq-item[open] summary{background:var(--brand-050);color:var(--brand-700)}
.faq-icon{flex:none;width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border:1.5px solid currentColor;border-radius:50%;transition:transform .25s}
.faq-icon svg{width:12px;height:12px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-answer{padding:0 24px 22px;font-size:15.5px;line-height:1.85;color:var(--ink-500)}
.faq-answer strong{color:var(--ink-900)}

/* ---------- 联系表单 ---------- */
.contact-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:48px;display:grid;grid-template-columns:5fr 7fr;gap:48px;box-shadow:var(--sh-1)}
.contact-intro h2{font-size:28px;margin-bottom:16px}
.contact-intro p{font-size:15.5px;color:var(--ink-500)}
.contact-list{margin-top:26px;display:grid;gap:14px}
.contact-list li{display:flex;gap:12px;font-size:14.5px;color:var(--ink-700)}
.contact-list li::before{content:"";flex:none;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--brand)}
.contact-list strong{color:var(--ink-900);font-weight:700}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:700;color:var(--ink-700)}
.field .req{color:var(--brand);margin-left:2px}
.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;color:var(--ink-900);padding:0 14px;height:48px;transition:border-color .2s,box-shadow .2s}
.field textarea{height:118px;padding:12px 14px;resize:vertical;line-height:1.75}
.field input::placeholder,.field textarea::placeholder{color:#A2968B}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand)}
.form-actions{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:4px}
.form-hint{font-size:13px;color:var(--ink-500)}
.form-tip{display:none;grid-column:1/-1;padding:12px 16px;border-radius:var(--r-sm);font-size:14px;border-left:4px solid transparent}
.form-tip.is-ok{display:block;background:var(--ok-bg);border-left-color:var(--ok);color:#1F5C46}
.form-tip.is-err{display:block;background:var(--err-bg);border-left-color:var(--err);color:#8E2A1F}

/* ---------- 收尾 CTA ---------- */
.cta-band{background:var(--accent);color:#FAF6F0;border-radius:var(--r-lg);padding:56px;display:flex;align-items:center;justify-content:space-between;gap:40px}
.cta-band h2{font-size:29px;color:#FAF6F0}
.cta-band p{margin-top:14px;font-size:15.5px;color:rgba(250,246,240,.8);max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:none}
.cta-actions .btn-primary:hover{background:#fff;color:var(--brand-700)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:#FAF6F0;border-top:4px solid var(--brand);margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-top:64px;padding-bottom:48px}
.footer-brand .logo-text{color:#FAF6F0}
.footer-brand .logo-sub{color:rgba(250,246,240,.6)}
.footer-desc{margin-top:18px;font-size:14px;line-height:1.85;color:rgba(250,246,240,.72);max-width:330px}
.footer-contact{margin-top:22px;display:grid;gap:10px;font-size:14px;color:rgba(250,246,240,.72)}
.footer-contact strong{display:inline-block;min-width:64px;color:#FAF6F0;font-weight:600}
.footer-col h4{font-size:14px;font-weight:600;color:#FAF6F0;margin-bottom:18px;letter-spacing:.04em}
.footer-col ul{display:grid;gap:11px}
.footer-col a{font-size:14px;color:rgba(250,246,240,.72);transition:color .2s,transform .2s;display:inline-block}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding-top:22px;padding-bottom:28px;border-top:1px solid rgba(250,246,240,.14);font-size:13px;color:rgba(250,246,240,.6)}
.footer-bottom .domain{font-variant-numeric:tabular-nums;letter-spacing:.04em}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 28px}
  .dark-block{padding:44px;gap:36px}
  .contact-wrap{padding:40px;gap:36px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-search{display:none}
  .nav-icon-btn{display:inline-flex}
  .nav-tel{display:none}
  .section{padding:72px 0}
  .page-hero{min-height:280px}
  .page-hero h1{font-size:34px}
  .promise-grid{grid-template-columns:1fr;gap:20px}
  .promise:nth-child(2),.promise:nth-child(3){margin-top:0}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px}
  .dark-block{grid-template-columns:1fr;padding:40px}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:28px}
  .col-4,.col-5,.col-7,.col-8{grid-column:1/-1}
  .toc{position:static}
  .contact-wrap{grid-template-columns:1fr;padding:32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .nav-top-inner{min-height:58px;gap:12px}
  .logo-text{font-size:17px}
  .logo-sub{display:none}
  .nav-tools{gap:10px}
  .channels-inner{height:50px;gap:4px}
  .channel{height:32px;padding:0 13px;font-size:13.5px}
  .section{padding:56px 0}
  .page-hero{min-height:0}
  .page-hero-inner{padding:40px 0}
  .page-hero h1{font-size:28px}
  .page-hero .hero-sub{font-size:15px}
  .hero-actions .btn{width:100%}
  .section-head h2{font-size:25px}
  .promise{padding:26px 22px}
  .steps{grid-template-columns:1fr;gap:24px}
  .dark-block{padding:28px;border-radius:var(--r-md)}
  .dark-block h2{font-size:24px}
  .metrics{grid-template-columns:1fr 1fr;gap:22px 16px}
  .metric strong{font-size:27px}
  .faq-item summary{font-size:15.5px;padding:16px 18px;min-height:58px}
  .faq-answer{padding:0 18px 18px;font-size:15px}
  .contact-wrap{padding:24px;border-radius:var(--r-md)}
  .contact-intro h2{font-size:23px}
  .form-grid{grid-template-columns:1fr;gap:16px}
  .form-actions .btn{width:100%}
  .cta-band{padding:28px;border-radius:var(--r-md)}
  .cta-band h2{font-size:23px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;padding-top:48px;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .site-footer{margin-top:56px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category4 */
:root{
  --ink-900:#14100D;
  --ink-700:#3B322B;
  --ink-500:#6B5F55;
  --line:#E7DCD0;
  --bg:#FAF6F0;
  --surface:#FFFFFF;
  --brand:#E0632B;
  --brand-700:#B84A18;
  --brand-050:#FCEDE3;
  --accent:#1E4B45;
  --accent-050:#E4EEEB;
  --success:#2F7D5F;
  --success-bg:#E8F3EE;
  --error:#C0392B;
  --error-bg:#FBEDEA;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --sh-1:0 1px 2px rgba(20,16,13,.06), 0 8px 24px -12px rgba(20,16,13,.14);
  --sh-2:0 18px 40px -22px rgba(20,16,13,.28);
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink-900);
  background:var(--bg);
  letter-spacing:0;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease,transform .18s ease}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.35}
p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-050);color:var(--brand-700)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.tnum{font-variant-numeric:tabular-nums}

/* ---------- 导航 ---------- */
.site-header{background:var(--surface);border-bottom:1px solid var(--line)}
.nav-top{height:64px}
.nav-top-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:32px;height:32px;border-radius:9px;background:var(--brand);
  display:inline-flex;align-items:flex-end;justify-content:center;gap:3px;
  padding-bottom:8px;flex:0 0 auto;
}
.logo-mark i{display:block;width:4px;border-radius:2px;background:#fff}
.logo-mark i:nth-child(1){height:8px}
.logo-mark i:nth-child(2){height:15px}
.logo-mark i:nth-child(3){height:11px}
.logo-text{font-size:19px;font-weight:800;letter-spacing:.2px;color:var(--ink-900);white-space:nowrap}
.logo-sub{font-size:12px;font-weight:600;color:var(--ink-500);margin-left:5px;letter-spacing:.5px}
.nav-tools{display:flex;align-items:center;gap:14px}
.nav-search{
  display:flex;align-items:center;gap:8px;width:220px;height:40px;padding:0 14px;
  border:1px solid var(--line);border-radius:999px;background:var(--bg);color:var(--ink-500);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(224,99,43,.12)}
.nav-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink-900)}
.nav-search input::placeholder{color:var(--ink-500)}
.nav-icon-btn{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);color:var(--ink-700);cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.nav-icon-btn:hover{background:var(--brand-050);color:var(--brand-700);border-color:var(--brand-050)}
.nav-tel{font-size:14px;font-weight:700;color:var(--accent);white-space:nowrap}
.nav-tel:hover{color:var(--brand-700)}
.nav-channels{
  position:sticky;top:0;z-index:50;
  background:rgba(250,246,240,.96);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.channels-inner{display:flex;gap:8px;overflow-x:auto;padding:8px 32px;scrollbar-width:none}
.channels-inner::-webkit-scrollbar{display:none}
.channel{
  flex:0 0 auto;padding:9px 16px;border-radius:999px;font-size:14.5px;font-weight:600;
  color:var(--ink-700);white-space:nowrap;
}
.channel:hover{background:var(--brand-050);color:var(--brand-700)}
.channel.is-active{background:var(--brand);color:#fff}
.channel.is-active:hover{background:var(--brand-700);color:#fff}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:700;border:1.5px solid transparent;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:none;box-shadow:var(--sh-1)}
.btn-ghost{background:transparent;border-color:var(--accent);color:var(--accent)}
.btn-ghost:hover{background:var(--accent-050);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px}
.btn-block{width:100%}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;color:#FAF6F0;
  background:#14100D url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  min-height:280px;display:flex;align-items:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(20,16,13,.90),rgba(20,16,13,.66) 55%,rgba(20,16,13,.34));
}
.page-hero .container{position:relative;z-index:1;padding-top:48px;padding-bottom:48px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(250,246,240,.72);margin-bottom:16px}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{color:rgba(250,246,240,.5)}
.page-hero h1{font-size:clamp(28px,4vw,40px);line-height:1.3;margin-bottom:16px;max-width:760px}
.hero-lead{max-width:660px;color:rgba(250,246,240,.86);font-size:16.5px;margin-bottom:24px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;
  font-size:13px;font-weight:600;background:rgba(250,246,240,.14);color:#FAF6F0;
  border:1px solid rgba(250,246,240,.18);
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section[id]{scroll-margin-top:120px}
.section-head{max-width:720px;margin-bottom:40px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--brand-700);letter-spacing:.04em;
}
.eyebrow::before{content:"";width:4px;height:15px;border-radius:2px;background:var(--brand);display:block}
.section-title{font-size:clamp(24px,3vw,32px);margin:14px 0 12px;line-height:1.35}
.section-desc{color:var(--ink-500);font-size:16px}
.section-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.link-more{font-size:14.5px;font-weight:700;color:var(--brand);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;white-space:nowrap}
.link-more:hover{color:var(--brand-700);text-decoration-thickness:2px}

/* ---------- 选型基准卡 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.base-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:28px 26px;box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.base-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#DCCEBE}
.base-num{
  display:block;font-size:32px;font-weight:800;line-height:1;color:var(--brand);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.base-card h3{font-size:20px;margin:16px 0 10px}
.base-card p{margin:0;color:var(--ink-500);font-size:15.5px}

/* ---------- 指标条 ---------- */
.metric-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);
  overflow:hidden;box-shadow:var(--sh-1);
}
.metric{padding:26px 24px;border-left:1px solid var(--line)}
.metric:first-child{border-left:0}
.metric strong{
  display:block;font-size:34px;line-height:1.1;font-weight:800;color:var(--accent);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;margin-bottom:8px;
}
.metric strong small{font-size:15px;font-weight:700;margin-left:4px;color:var(--ink-700)}
.metric span{font-size:14px;color:var(--ink-500);line-height:1.6;display:block}

/* ---------- 参数对照 ---------- */
.compare{
  display:grid;grid-template-columns:1fr 1fr;
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  background:var(--surface);box-shadow:var(--sh-1);
}
.compare-col + .compare-col{border-left:1px solid var(--line)}
.compare-head{
  padding:18px 26px;font-size:15px;font-weight:800;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:10px;
}
.compare-head::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--ink-500);flex:0 0 auto}
.compare-col--good .compare-head{color:var(--accent)}
.compare-col--good .compare-head::before{background:var(--accent)}
.compare-col--plain .compare-head{color:var(--ink-500)}
.compare li{
  display:flex;gap:12px;align-items:flex-start;
  padding:15px 26px;font-size:15.5px;border-bottom:1px dashed var(--line);
  color:var(--ink-700);line-height:1.7;
}
.compare li:last-child{border-bottom:0}
.compare li i{
  flex:0 0 auto;margin-top:9px;width:6px;height:6px;border-radius:50%;
  background:var(--ink-500);display:block;
}
.compare-col--plain li{color:var(--ink-500)}
.compare-col--good li{color:var(--ink-900)}
.compare-col--good li i{background:var(--accent)}

/* ---------- 场景设备卡 ---------- */
.device-list{display:grid;gap:var(--gap)}
.device-card{
  display:grid;grid-template-columns:5fr 7fr;gap:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.device-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:#DCCEBE}
.device-media{position:relative;overflow:hidden;background:#EFE7DC;min-height:260px}
.device-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.device-card:hover .device-media img{transform:scale(1.03)}
.device-body{padding:28px 30px}
.device-body h3{font-size:21px;margin-bottom:12px}
.device-body p{color:var(--ink-500);font-size:15.5px;margin-bottom:16px}
.device-points{display:grid;gap:8px;margin-bottom:18px}
.device-points li{position:relative;padding-left:18px;font-size:15px;color:var(--ink-700);line-height:1.7}
.device-points li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;
  background:var(--brand);
}
.spec-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
  font-size:12.5px;font-weight:600;background:var(--brand-050);color:var(--brand-700);
  white-space:nowrap;
}
.tag--accent{background:var(--accent-050);color:var(--accent)}
.tag--ink{background:rgba(20,16,13,.07);color:var(--ink-700)}

/* ---------- 流程 ---------- */
.steps{position:relative;max-width:820px}
.step{position:relative;padding-left:64px;padding-bottom:34px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:15px;top:36px;bottom:6px;width:1px;background:var(--line);
}
.step:last-child::before{display:none}
.step-dot{
  position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;
  border:1.5px solid var(--brand);background:var(--bg);color:var(--brand);
  display:grid;place-items:center;font-size:12.5px;font-weight:800;
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:20px;margin:2px 0 8px}
.step p{color:var(--ink-500);font-size:15.5px}

/* ---------- FAQ ---------- */
.faq{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);overflow:hidden;box-shadow:var(--sh-1)}
.faq-item + .faq-item{border-top:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:62px;padding:16px 24px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--ink-900);
  transition:background-color .18s ease,color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--brand-050)}
.faq-item[open] summary{background:var(--brand-050);color:var(--brand-700)}
.faq-icon{position:relative;flex:0 0 auto;width:22px;height:22px;transition:transform .22s ease}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq-icon::before{left:0;top:10px;width:22px;height:2px}
.faq-icon::after{left:10px;top:0;width:2px;height:22px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-answer{padding:0 24px 20px;color:var(--ink-500);font-size:16px;line-height:1.85}

/* ---------- CTA / 表单 ---------- */
.cta{background:var(--ink-900);color:#FAF6F0;padding:88px 0}
.cta-grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start}
.cta h2{font-size:clamp(24px,3vw,32px);color:#fff;margin-bottom:16px;line-height:1.35}
.cta p{color:rgba(250,246,240,.72);font-size:16px;margin-bottom:24px}
.cta-list{display:grid;gap:12px}
.cta-list li{display:flex;align-items:center;gap:10px;font-size:14.5px;color:rgba(250,246,240,.82)}
.cta-list li::before{
  content:"";width:16px;height:2px;border-radius:2px;background:var(--brand);flex:0 0 auto;
}
.form-card{
  background:rgba(250,246,240,.045);border:1px solid rgba(250,246,240,.14);
  border-radius:var(--r-lg);padding:30px;
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field--full{grid-column:1/-1}
.field label{font-size:13px;font-weight:600;color:rgba(250,246,240,.82)}
.req{color:var(--brand);margin-left:3px}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  border:1px solid rgba(250,246,240,.2);background:rgba(20,16,13,.4);
  color:#FAF6F0;font-size:15px;outline:none;
  transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.field textarea{height:auto;min-height:96px;padding:12px 14px;line-height:1.7;resize:vertical}
.field select{appearance:none;background-image:none;cursor:pointer}
.field input::placeholder,.field textarea::placeholder{color:rgba(250,246,240,.42)}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand);box-shadow:inset 0 0 0 1px var(--brand);background:rgba(20,16,13,.6);
}
.field select option{color:#14100D;background:#fff}
.form-note{font-size:13px;color:rgba(250,246,240,.56);margin-top:12px;line-height:1.7}
.form-alert{
  margin-top:16px;padding:12px 16px;border-radius:var(--r-sm);
  background:var(--success-bg);color:#1B4C38;font-size:14px;font-weight:600;
  border-left:4px solid var(--success);
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:#FAF6F0;border-top:4px solid var(--brand);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .logo-text{color:#FAF6F0}
.footer-brand .logo-sub{color:rgba(250,246,240,.6)}
.footer-desc{color:rgba(250,246,240,.68);font-size:14.5px;margin:18px 0 22px;max-width:350px;line-height:1.8}
.footer-contact{display:grid;gap:9px;font-size:14px;color:rgba(250,246,240,.78)}
.footer-contact strong{color:#FAF6F0;font-weight:600;margin-right:10px}
.footer-col h4{font-size:14px;font-weight:700;color:#FAF6F0;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:10px}
.footer-col a{display:inline-block;font-size:14px;color:rgba(250,246,240,.72)}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  border-top:1px solid rgba(250,246,240,.14);
  padding:20px 0 24px;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(250,246,240,.55);
}
.footer-bottom .domain{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .container{padding:0 28px}
  .channels-inner{padding:8px 28px}
}
@media (max-width:1023px){
  body{font-size:16px}
  .container{padding:0 24px}
  .channels-inner{padding:8px 24px}
  .section{padding:72px 0}
  .section--tight{padding:56px 0}
  .cta{padding:72px 0}
  .grid-3{grid-template-columns:1fr}
  .metric-strip{grid-template-columns:1fr 1fr}
  .metric:nth-child(3){border-left:0}
  .metric:nth-child(3),.metric:nth-child(4){border-top:1px solid var(--line)}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .nav-search{width:180px}
}
@media (max-width:767px){
  .nav-search{display:none}
  .nav-icon-btn{display:inline-flex}
  .nav-tel{display:none}
  .nav-top,.nav-top-inner{height:56px}
  .logo-text{font-size:17px}
  .compare{grid-template-columns:1fr}
  .compare-col + .compare-col{border-left:0;border-top:1px solid var(--line)}
  .device-card{grid-template-columns:1fr}
  .device-media{min-height:0;aspect-ratio:16/10}
  .device-body{padding:24px}
  .section-head--row{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (max-width:640px){
  body{font-size:15.8px}
  .container{padding:0 20px}
  .channels-inner{padding:8px 20px}
  .nav-top-inner{gap:12px}
  .nav-tools{gap:8px}
  .section{padding:56px 0}
  .section--tight{padding:48px 0}
  .page-hero{min-height:200px}
  .page-hero .container{padding-top:34px;padding-bottom:34px}
  .cta{padding:56px 0}
  .metric-strip{grid-template-columns:1fr}
  .metric{border-left:0}
  .metric + .metric{border-top:1px solid var(--line)}
  .metric strong{font-size:28px}
  .form-grid{grid-template-columns:1fr}
  .form-card{padding:22px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
  .compare li,.compare-head{padding-left:18px;padding-right:18px}
  .faq-item summary{padding:14px 18px;font-size:15.5px}
  .faq-answer{padding:0 18px 18px;font-size:15.5px}
  .step{padding-left:52px}
  .base-card{padding:24px 22px}
}