/* roulang page: index */
:root{
  --brand-600:#1D5FE0;
  --brand-700:#1749B0;
  --brand-500:#3D7BF0;
  --brand-50:#EAF1FE;
  --accent-500:#FF7A45;
  --accent-50:#FFEDE5;
  --success:#12A88F;
  --warn:#D9534F;
  --bg:#F5F7FB;
  --card:#FFFFFF;
  --line:#E6EBF3;
  --text:#1B2432;
  --muted:#5E6B7F;
  --input-bg:#F8FAFF;
  --footer-bg:#101B33;
  --sidebar-w:248px;
  --r-card:14px;
  --r-btn:10px;
  --r-img:16px;
  --r-input:10px;
  --shadow-1:0 1px 2px rgba(20,40,80,.04),0 8px 24px -14px rgba(20,40,80,.12);
  --shadow-2:0 2px 4px rgba(20,40,80,.06),0 16px 32px -16px rgba(20,40,80,.18);
  --sec-y:88px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease,box-shadow .18s ease}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4,h5{margin:0;font-weight:600;color:var(--text);line-height:1.35}
h1{font-size:42px}
h2{font-size:28px}
h3{font-size:20px}
h4{font-size:17px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(29,95,224,.28);border-radius:8px}
.num{font-variant-numeric:tabular-nums}

/* ============ 布局外壳 ============ */
.shell{min-height:100vh}
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--card);
  border-right:1px solid var(--line);
  display:flex;
  flex-direction:column;
  padding:22px 16px 18px;
  z-index:1040;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:6px 8px 18px;
  border-bottom:1px solid var(--line);
  margin-bottom:16px;
}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  border-radius:12px;
  background:var(--brand-50);
  color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:15.5px;font-weight:600;color:var(--text);white-space:nowrap}
.brand-sub{font-size:12px;color:var(--muted)}
.side-nav{display:flex;flex-direction:column;gap:4px;flex:1}
.side-nav .nav-item-link{
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  padding:0 12px;
  border-radius:var(--r-btn);
  color:var(--text);
  font-size:15px;
  font-weight:500;
  position:relative;
  transition:background .18s ease,color .18s ease;
}
.side-nav .nav-item-link i{font-size:16px;width:18px;text-align:center;color:var(--muted);transition:color .18s ease}
.side-nav .nav-item-link:hover{background:var(--brand-50);color:var(--brand-700)}
.side-nav .nav-item-link:hover i{color:var(--brand-600)}
.side-nav .nav-item-link.active{
  background:var(--brand-50);
  color:var(--brand-700);
  font-weight:600;
}
.side-nav .nav-item-link.active i{color:var(--brand-600)}
.side-nav .nav-item-link.active::before{
  content:"";
  position:absolute;
  left:-16px;top:50%;
  transform:translateY(-50%);
  width:3px;height:24px;
  border-radius:0 3px 3px 0;
  background:var(--brand-600);
}
.side-divider{height:1px;background:var(--line);margin:12px 0}
.side-search{
  display:flex;
  align-items:center;
  height:36px;
  background:var(--input-bg);
  border:1px solid var(--line);
  border-radius:999px;
  padding:0 4px 0 14px;
  margin-bottom:14px;
}
.side-search input{
  border:0;background:transparent;outline:none;
  font-size:13.5px;color:var(--text);flex:1;min-width:0;
}
.side-search input::placeholder{color:#98A4B6}
.side-search button{
  border:0;width:28px;height:28px;border-radius:50%;
  background:var(--brand-600);color:#fff;font-size:12px;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:background .18s ease;
}
.side-search button:hover{background:var(--brand-700)}
.side-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  height:44px;
  border-radius:var(--r-btn);
  background:var(--brand-600);
  color:#fff;
  font-size:15px;
  font-weight:600;
  margin-top:8px;
}
.side-cta:hover{background:var(--brand-700);color:#fff}

.main{margin-left:var(--sidebar-w);padding:0 0 0 0}
.wrap{max-width:1180px;margin:0 auto;padding:0 32px}
section{padding:var(--sec-y) 0}
section.tight{padding:56px 0}

/* ============ 移动端顶栏 ============ */
.topbar-mobile{
  position:fixed;top:0;left:0;right:0;height:56px;
  background:#fff;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:12px;
  padding:0 16px;z-index:1035;
}
.hamburger{
  width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);background:#fff;
  color:var(--text);font-size:17px;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
}
.hamburger:hover{background:var(--brand-50);color:var(--brand-700)}
.topbar-mobile .brand-name{font-size:15px}

.drawer-nav{display:flex;flex-direction:column;gap:4px;padding:8px 4px}
.drawer-nav .nav-item-link{
  display:flex;align-items:center;gap:12px;
  height:46px;padding:0 12px;border-radius:var(--r-btn);
  color:var(--text);font-size:15.5px;font-weight:500;
}
.drawer-nav .nav-item-link i{width:18px;text-align:center;color:var(--muted)}
.drawer-nav .nav-item-link.active{background:var(--brand-50);color:var(--brand-700);font-weight:600}
.drawer-nav .nav-item-link.active i{color:var(--brand-600)}

/* ============ 按钮 ============ */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary-x{background:var(--brand-600);color:#fff}
.btn-primary-x:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px)}
.btn-primary-x:active{transform:translateY(0)}
.btn-ghost-x{background:#fff;color:var(--text);border-color:var(--line)}
.btn-ghost-x:hover{background:var(--input-bg);border-color:var(--brand-500);color:var(--brand-700)}
.btn-accent-x{background:var(--accent-500);color:#fff}
.btn-accent-x:hover{background:#F2692F;color:#fff;transform:translateY(-1px)}
.link-x{color:var(--brand-600);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px}
.link-x:hover{color:var(--brand-600);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}

/* ============ 通用标签/徽章 ============ */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;
  border-radius:999px;
  font-size:13px;font-weight:500;
  background:var(--brand-50);color:var(--brand-700);
}
.tag-accent{background:var(--accent-50);color:#C4491A}
.tag-line{background:#fff;border:1px solid var(--line);color:var(--muted)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;font-weight:600;color:var(--brand-600);
  margin-bottom:14px;
}
.sec-head{margin-bottom:40px;max-width:760px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head p{color:var(--muted);font-size:16px;margin-top:12px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.sec-head-row .sec-head{margin-bottom:0}

.card-x{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.card-x:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.icon-pill{
  width:44px;height:44px;border-radius:12px;
  background:var(--brand-50);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;flex:0 0 44px;
}

/* ============ Hero ============ */
.hero{padding:72px 0 64px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{margin-bottom:18px}
.hero h1 span{color:var(--brand-600)}
.hero-lead{font-size:17px;color:var(--muted);max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero-stats{display:flex;gap:28px;flex-wrap:wrap}
.hero-stat{display:flex;align-items:center;gap:10px}
.hero-stat i{color:var(--brand-600);font-size:15px}
.hero-stat b{font-size:16px;font-weight:600}
.hero-stat span{font-size:13.5px;color:var(--muted)}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;height:380px;object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--line);
  box-shadow:var(--shadow-2);
}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  border-radius:var(--r-img);
  background:rgba(29,95,224,.10);
  pointer-events:none;
}
.hero-float{
  position:absolute;left:20px;bottom:-18px;right:auto;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:12px 16px;box-shadow:var(--shadow-2);
  display:flex;align-items:center;gap:10px;
  font-size:13.5px;color:var(--text);
}
.hero-float .dot{width:8px;height:8px;border-radius:50%;background:var(--success)}

/* ============ 指标条 ============ */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.metric{padding:24px}
.metric .num{font-size:30px;font-weight:600;color:var(--brand-700);line-height:1.2}
.metric .metric-label{font-size:14px;color:var(--muted);margin-top:6px}
.metric i{color:var(--brand-600);font-size:16px;margin-bottom:12px;display:block}

/* ============ 功能分组 ============ */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:20px}
.feature-main{padding:28px;display:flex;flex-direction:column;gap:18px}
.feature-main img{width:100%;height:220px;object-fit:cover;border-radius:12px}
.feature-main h3{font-size:22px}
.feature-main p{color:var(--muted);font-size:15px}
.feature-side{display:grid;grid-template-rows:1fr 1fr;gap:20px}
.feature-mini{padding:22px;display:flex;flex-direction:column;gap:10px}
.feature-mini h4{font-size:17px}
.feature-mini p{font-size:14px;color:var(--muted)}
.icon-list{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:20px}
.icon-list .card-x{padding:20px;display:flex;align-items:flex-start;gap:14px}
.icon-list h4{font-size:15.5px;margin-bottom:4px}
.icon-list p{font-size:13.5px;color:var(--muted)}

/* ============ 使用场景 ============ */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:32px 0}
.scene.reverse .scene-media{order:2}
.scene-media img{
  width:100%;height:300px;object-fit:cover;
  border-radius:var(--r-img);
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
}
.scene-media{position:relative}
.scene-media .scene-badge{
  position:absolute;top:16px;left:16px;
  background:rgba(255,255,255,.94);
  border:1px solid var(--line);
  border-radius:999px;
  padding:5px 14px;font-size:13px;font-weight:600;color:var(--brand-700);
}
.scene-body h3{font-size:26px;margin-bottom:14px}
.scene-body p{color:var(--muted);font-size:15.5px;margin-bottom:14px}
.scene-points{display:flex;gap:20px;flex-wrap:wrap;margin:18px 0 22px}
.scene-points div{font-size:14px;color:var(--text);display:flex;align-items:center;gap:8px}
.scene-points i{color:var(--success)}

/* ============ 用户反馈 ============ */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
.case-card{overflow:hidden;display:flex;flex-direction:column}
.case-card img{width:100%;height:180px;object-fit:cover}
.case-body{padding:22px;display:flex;flex-direction:column;gap:14px;flex:1}
.case-quote{font-size:15px;color:var(--text);line-height:1.75}
.case-user{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--muted)}
.case-user .avatar{
  width:32px;height:32px;border-radius:50%;
  background:var(--brand-50);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:600;flex:0 0 32px;
}
.case-data{display:flex;gap:24px;border-top:1px solid var(--line);padding-top:16px;margin-top:auto}
.case-data b{display:block;font-size:22px;font-weight:600;color:var(--brand-700);line-height:1.2}
.case-data span{font-size:13px;color:var(--muted)}

/* ============ 方案 ============ */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start;padding-top:14px}
.plan{padding:26px;display:flex;flex-direction:column;gap:16px;position:relative}
.plan.featured{border-color:var(--brand-600);transform:translateY(-12px);box-shadow:var(--shadow-2)}
.plan.featured:hover{transform:translateY(-14px)}
.plan-badge{
  position:absolute;top:-13px;left:26px;
  background:var(--accent-500);color:#fff;
  font-size:12.5px;font-weight:600;
  padding:4px 12px;border-radius:999px;
}
.plan h3{font-size:16px}
.plan .price{font-size:36px;font-weight:600;color:var(--text);line-height:1.15;font-variant-numeric:tabular-nums}
.plan .price small{font-size:14px;font-weight:400;color:var(--muted);margin-left:6px}
.plan .plan-desc{font-size:14px;color:var(--muted)}
.plan ul{display:flex;flex-direction:column;gap:10px;margin:6px 0 8px}
.plan li{font-size:14.5px;color:var(--text);display:flex;gap:10px;align-items:flex-start}
.plan li i{color:var(--success);font-size:13px;margin-top:4px}
.plan .btn-x{width:100%}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{display:flex;flex-direction:column;overflow:hidden;height:100%}
.news-thumb{position:relative;background:#EEF2F8}
.news-thumb img{width:100%;height:172px;object-fit:cover}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.news-title{font-size:18px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover .news-title{color:var(--brand-600)}
.news-desc{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-more{font-size:14px;font-weight:600;color:var(--brand-600);margin-top:auto;display:inline-flex;align-items:center;gap:6px}
.empty-state{
  border:1px dashed #C7D3E6;
  border-radius:var(--r-card);
  background:#fff;
  padding:48px 24px;
  text-align:center;
  color:var(--muted);
}
.empty-state i{font-size:30px;color:#B7C4D8;display:block;margin-bottom:14px}
.empty-state p{font-size:15px}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto}
.faq-acc .accordion-item{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:#fff;
  margin-bottom:14px;
  overflow:hidden;
  box-shadow:var(--shadow-1);
}
.faq-acc .accordion-button{
  min-height:52px;
  padding:16px 22px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  background:#fff;
  box-shadow:none;
  gap:16px;
}
.faq-acc .accordion-button:not(.collapsed){color:var(--brand-700);background:var(--brand-50)}
.faq-acc .accordion-button:focus{box-shadow:0 0 0 3px rgba(29,95,224,.18);z-index:2}
.faq-acc .accordion-button::after{
  content:"+";
  background-image:none;
  font-size:20px;
  font-weight:400;
  line-height:1;
  width:24px;height:24px;
  display:flex;align-items:center;justify-content:center;
  color:var(--brand-600);
  transform:none;
  transition:transform .2s ease,color .2s ease;
  margin-left:auto;
}
.faq-acc .accordion-button:not(.collapsed)::after{content:"−";transform:rotate(180deg);color:var(--brand-700)}
.faq-acc .accordion-body{padding:6px 22px 22px;font-size:15px;line-height:1.8;color:var(--muted)}
.faq-cta{text-align:center;margin-top:28px}

/* ============ CTA / 表单 ============ */
.cta-band{
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--shadow-1);
  padding:44px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:start;
}
.cta-band h2{margin-bottom:14px}
.cta-band .cta-lead{color:var(--muted);font-size:15.5px;margin-bottom:24px}
.cta-list{display:flex;flex-direction:column;gap:12px}
.cta-list li{display:flex;gap:10px;font-size:14.5px;color:var(--text)}
.cta-list i{color:var(--brand-600);margin-top:4px;font-size:13px}
.form-x{display:flex;flex-direction:column;gap:16px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.field input,.field textarea{
  width:100%;
  height:44px;
  border:1px solid var(--line);
  border-radius:var(--r-input);
  background:var(--input-bg);
  padding:0 14px;
  font-size:15px;
  color:var(--text);
  font-family:inherit;
  transition:border-color .18s ease,background .18s ease,box-shadow .18s ease;
}
.field textarea{height:106px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#98A4B6}
.field input:focus,.field textarea:focus{
  outline:none;background:#fff;border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(29,95,224,.16);
}
.field .hint{font-size:13px;color:var(--muted);margin-top:6px}
.form-x .btn-x{width:100%}

/* ============ 页脚 ============ */
.footer{background:var(--footer-bg);color:#C8D2E4;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px}
.footer h4{color:#fff;font-size:15.5px;margin-bottom:18px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);color:#fff}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-sub{color:#8C9CBC}
.footer p{font-size:14px;line-height:1.8;color:#96A5C2}
.footer ul{display:flex;flex-direction:column;gap:11px}
.footer ul a{font-size:14px;color:#C8D2E4}
.footer ul a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-contact li{font-size:14px;color:#C8D2E4;display:flex;gap:10px;align-items:flex-start}
.footer-contact i{color:#6C86C6;margin-top:4px;font-size:13px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.09);
  padding:22px 0 28px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:#8395B4;
}
.footer-bottom a{color:#8395B4}
.footer-bottom a:hover{color:#fff}

/* ============ 响应式 ============ */
@media (min-width:1400px){
  :root{--sidebar-w:272px}
  h1{font-size:44px}
  .hero-grid{grid-template-columns:1.2fr 1fr}
}
@media (max-width:1199.98px){
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .icon-list{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991.98px){
  :root{--sec-y:64px}
  .sidebar{display:none}
  .main{margin-left:0;padding-top:56px}
  .wrap{padding:0 20px}
  .hero{padding:44px 0 52px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual img{height:300px}
  .hero-float{position:static;margin-top:14px}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:1fr}
  .feature-side{grid-template-rows:auto auto}
  .scene{grid-template-columns:1fr;gap:26px;padding:18px 0}
  .scene.reverse .scene-media{order:0}
  .scene-media img{height:250px}
  .plan-grid{grid-template-columns:1fr;padding-top:0}
  .plan.featured{transform:none}
  .plan.featured:hover{transform:translateY(-2px)}
  .cta-band{grid-template-columns:1fr;padding:30px;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  h1{font-size:30px}
  h2{font-size:24px}
}
@media (max-width:767.98px){
  .news-grid{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .icon-list{grid-template-columns:1fr}
  .hero-stats{gap:18px}
  .footer-grid{grid-template-columns:1fr}
  .sec-head-row{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (max-width:575.98px){
  :root{--sec-y:48px}
  .wrap{padding:0 16px}
  h1{font-size:28px}
  h2{font-size:22px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn-x{width:100%}
  .metrics{grid-template-columns:repeat(2,1fr);gap:14px}
  .metric{padding:18px}
  .metric .num{font-size:24px}
  .feature-main{padding:20px}
  .cta-band{padding:22px}
  .card-x:hover{transform:none}
}

/* roulang page: article */
:root{
  --brand-600:#1D5FE0;
  --brand-700:#1749B0;
  --brand-500:#3B78EA;
  --brand-50:#EAF1FE;
  --brand-100:#DCE8FF;
  --accent-500:#FF7A45;
  --accent-50:#FFF2EC;
  --accent-700:#C9500F;
  --success:#12A88F;
  --danger:#D9534F;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E6EBF3;
  --text:#1B2432;
  --muted:#5E6B7F;
  --r-card:14px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,40,80,.04),0 8px 24px -14px rgba(20,40,80,.12);
  --sh-2:0 2px 4px rgba(20,40,80,.06),0 16px 32px -16px rgba(20,40,80,.18);
  --side-w:248px;
  --ease:180ms ease;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:600;line-height:1.35;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand-700);}
button{font:inherit;cursor:pointer;}
input,textarea{font:inherit;}
.num{font-variant-numeric:tabular-nums;}

.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px;}

/* ---------- 侧栏 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--side-w);
  background:var(--surface);border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:18px;
  padding:22px 16px 20px;z-index:1040;
}
.side-logo{
  display:flex;align-items:center;gap:10px;
  padding:2px 8px 16px;border-bottom:1px solid var(--line);
}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  background:var(--brand-50);color:var(--brand-600);
  display:grid;place-items:center;font-size:17px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0;}
.brand-name{font-size:15px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.brand-sub{font-size:12px;color:var(--muted);}
.side-nav{display:flex;flex-direction:column;gap:4px;}
.nav-item-link{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;border-radius:10px;
  color:var(--text);font-size:15px;font-weight:500;
  transition:background var(--ease),color var(--ease);
}
.nav-item-link i{width:18px;text-align:center;font-size:16px;color:var(--muted);transition:color var(--ease);}
.nav-item-link:hover{background:#F3F6FD;color:var(--brand-700);}
.nav-item-link:hover i{color:var(--brand-600);}
.nav-item-link.active{background:var(--brand-50);color:var(--brand-700);font-weight:600;padding-left:18px;}
.nav-item-link.active i{color:var(--brand-600);}
.nav-item-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;
  border-radius:3px;background:var(--brand-600);
}
.side-cta{margin-top:auto;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  border:1px solid transparent;font-size:15px;font-weight:500;
  transition:background var(--ease),border-color var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-brand{background:var(--brand-600);color:#fff;}
.btn-brand:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);}
.btn-brand:active{transform:none;}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--text);}
.btn-ghost:hover{border-color:var(--brand-500);background:#F8FAFF;color:var(--brand-700);}
.btn:focus-visible{outline:3px solid rgba(29,95,224,.28);outline-offset:2px;}
.btn-block{width:100%;}

/* ---------- 主区 ---------- */
.page-wrap{margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column;}
.main{flex:1 1 auto;padding:30px 0 0;}

/* ---------- 移动端顶部栏 / 抽屉 ---------- */
.topbar{display:none;}
.nav-drawer{width:280px;}
.drawer-title{font-size:16px;font-weight:600;color:var(--text);}
.offcanvas-body{display:flex;flex-direction:column;gap:18px;}

@media (max-width:991.98px){
  .sidebar{display:none;}
  .page-wrap{margin-left:0;padding-top:56px;}
  .topbar{
    display:flex;position:fixed;top:0;left:0;right:0;height:56px;z-index:1050;
    align-items:center;justify-content:space-between;
    padding:0 16px;background:#fff;border-bottom:1px solid var(--line);
  }
  .topbar .side-logo{padding:0;border:0;gap:8px;}
  .topbar .brand-mark{width:34px;height:34px;border-radius:10px;font-size:15px;}
  .hamburger{
    width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
    background:#fff;color:var(--text);display:grid;place-items:center;font-size:16px;
  }
  .hamburger:hover{border-color:var(--brand-500);color:var(--brand-600);}
}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  font-size:13px;color:var(--muted);margin-bottom:18px;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand-600);}
.crumb .sep{color:#B9C3D4;}
.crumb .current{color:var(--text);font-weight:500;}

/* ---------- 文章头 ---------- */
.article-head{margin-bottom:22px;max-width:860px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:13px;font-weight:500;
}
.badge-brand{background:var(--brand-50);color:var(--brand-700);}
.badge-accent{background:var(--accent-50);color:var(--accent-700);}
.article-head h1{
  font-size:clamp(26px,3.6vw,40px);
  font-weight:600;line-height:1.32;margin:14px 0 14px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  font-size:13px;color:var(--muted);
}
.article-meta span{display:inline-flex;align-items:center;gap:6px;}
.article-meta i{color:var(--brand-600);font-size:13px;}

/* ---------- 封面 ---------- */
.article-cover{
  margin:0 0 30px;border-radius:14px;overflow:hidden;
  background:#EEF2F9;box-shadow:var(--sh-1);aspect-ratio:16/9;max-height:460px;
}
.article-cover img{width:100%;height:100%;object-fit:cover;}

/* ---------- 正文布局 ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px;}
.article-body{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  font-size:17px;line-height:1.9;color:#26303F;
  min-width:0;overflow-wrap:break-word;
}
.article-body>*:first-child{margin-top:0;}
.article-body>*:last-child{margin-bottom:0;}
.article-body h2{
  position:relative;padding-left:14px;
  font-size:23px;line-height:1.4;font-weight:600;color:var(--text);
  margin:36px 0 14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;
  border-radius:2px;background:var(--brand-600);
}
.article-body h3{font-size:19px;font-weight:600;color:#22304A;margin:26px 0 10px;}
.article-body h4{font-size:17px;font-weight:600;color:#22304A;margin:20px 0 8px;}
.article-body p{margin:0 0 16px;}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-700);}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:24px;list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;}
.article-body blockquote{
  margin:20px 0;padding:16px 20px;border-left:3px solid var(--brand-600);
  background:var(--brand-50);border-radius:0 10px 10px 0;
  color:#33415C;font-size:16px;
}
.article-body img{border-radius:var(--r-img);margin:18px auto;}
.article-body figure{margin:20px 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px;}
.article-body table{
  width:100%;border-collapse:collapse;margin:20px 0;font-size:15px;
  display:block;overflow-x:auto;
}
.article-body th,.article-body td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;}
.article-body th{background:#F7FAFF;font-weight:600;color:#22304A;white-space:nowrap;}
.article-body tr:nth-child(even) td{background:#FBFCFE;}
.article-body pre{
  background:#0F1B33;color:#E7EDF9;padding:16px 18px;border-radius:12px;
  overflow-x:auto;font-size:14px;line-height:1.7;margin:20px 0;
}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;}

@media (min-width:768px){
  .article-body{padding:36px 42px;}
}

/* ---------- 侧目录 ---------- */
.article-side{display:none;}
.side-box{
  position:sticky;top:24px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:18px 16px;box-shadow:var(--sh-1);
}
.side-box-title{
  font-size:13px;font-weight:600;color:var(--muted);
  display:flex;align-items:center;gap:7px;margin-bottom:10px;
}
.side-box-title i{color:var(--brand-600);}
#tocList{display:flex;flex-direction:column;gap:2px;max-height:58vh;overflow:auto;}
.toc-link{
  font-size:14px;color:var(--muted);padding:7px 10px;border-radius:8px;
  border-left:2px solid transparent;line-height:1.5;
  transition:background var(--ease),color var(--ease);
}
.toc-link:hover{background:var(--brand-50);color:var(--brand-700);}

@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,760px) 264px;justify-content:center;}
  .article-layout.no-toc{grid-template-columns:minmax(0,760px);}
  .article-side{display:block;}
}

/* ---------- 空态 ---------- */
.empty-state{
  border:1px dashed #C6D4EC;border-radius:var(--r-card);background:#F8FAFF;
  padding:56px 24px;text-align:center;
}
.empty-state i{font-size:36px;color:#A9BBD8;margin-bottom:14px;display:block;}
.empty-state h2{font-size:22px;margin-bottom:10px;}
.empty-state p{color:var(--muted);font-size:15px;max-width:460px;margin:0 auto 22px;}

/* ---------- 文末页码 ---------- */
.post-nav{
  display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px;
}
.post-nav-item{
  display:flex;flex-direction:column;gap:6px;padding:18px 20px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.post-nav-item:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--brand-500);}
.post-nav-label{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:6px;}
.post-nav-label i{color:var(--brand-600);}
.post-nav-title{font-size:16px;font-weight:600;color:var(--text);line-height:1.5;}
.post-nav-item:hover .post-nav-title{color:var(--brand-700);}

/* ---------- 板块标题 ---------- */
.section{margin-top:56px;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;
}
.section-head h2{font-size:clamp(21px,2.4vw,26px);}
.section-head p{font-size:14px;color:var(--muted);margin:4px 0 0;}
.section-head .more{font-size:14px;white-space:nowrap;display:inline-flex;align-items:center;gap:6px;}
.section-head .more:hover{text-decoration:underline;text-underline-offset:3px;}

/* ---------- 相关推荐卡片 ---------- */
.rel-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:20px;}
.rel-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:box-shadow var(--ease),transform var(--ease);
}
.rel-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.rel-card .thumb{aspect-ratio:16/9;background:#EEF2F9;overflow:hidden;}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;}
.rel-card .rc-body{padding:16px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.rel-card h3{font-size:17px;line-height:1.5;transition:color var(--ease);}
.rel-card:hover h3{color:var(--brand-700);}
.rel-card p{font-size:14px;color:var(--muted);line-height:1.7;margin:0;}
.rel-card .rc-tag{font-size:12px;color:var(--brand-700);background:var(--brand-50);padding:3px 10px;border-radius:var(--r-pill);align-self:flex-start;}

@media (min-width:576px){.rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:992px){.rel-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}

/* ---------- 底部返回条 ---------- */
.back-bar{
  margin-top:28px;display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  padding:22px 24px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
}
.back-bar .bt{flex:1 1 240px;font-size:14px;color:var(--muted);margin:0;}

/* ---------- 页脚 ---------- */
.footer{background:#101B33;color:#B9C6DC;margin-top:64px;padding:56px 0 0;}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1fr);gap:32px;
  padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:6px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);color:#fff;}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-sub{color:#8797B3;}
.footer h4{color:#fff;font-size:16px;margin-bottom:14px;}
.footer ul{display:flex;flex-direction:column;gap:10px;}
.footer ul a{color:#B9C6DC;font-size:14px;}
.footer ul a:hover{color:#fff;}
.footer p{font-size:14px;line-height:1.85;color:#93A2BC;margin:0;}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:#B9C6DC;}
.footer-contact i{color:#6E8AC0;margin-top:5px;font-size:13px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding:20px 0;font-size:13px;color:#7D8CA8;
}

@media (min-width:768px){
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.3fr;}
  .post-nav{grid-template-columns:1fr 1fr;}
}
@media (max-width:575.98px){
  .wrap{padding:0 16px;}
  .post-nav{grid-template-columns:1fr;}
  .article-body{padding:20px 16px;font-size:16px;line-height:1.85;}
  .article-head h1{font-size:26px;}
  .footer{padding-top:40px;}
}
@media (min-width:1400px){
  :root{--side-w:272px;}
}

/* roulang page: category1 */
:root{
  --brand-600:#1D5FE0;
  --brand-700:#1749B0;
  --brand-500:#3D79E8;
  --brand-50:#EAF1FE;
  --accent-500:#FF7A45;
  --accent-50:#FFF1EA;
  --success:#12A88F;
  --danger:#D9534F;
  --bg:#F5F7FB;
  --card:#FFFFFF;
  --line:#E6EBF3;
  --text:#1B2432;
  --muted:#5E6B7F;
  --soft:#F8FAFF;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:16px;
  --radius-pill:999px;
  --shadow-1:0 1px 2px rgba(20,40,80,.04), 0 8px 24px -14px rgba(20,40,80,.12);
  --shadow-2:0 2px 4px rgba(20,40,80,.06), 0 16px 32px -16px rgba(20,40,80,.18);
  --sidebar-w:248px;
  --ease:180ms ease;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand-700);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;font-weight:600;color:var(--text);}
h1{font-size:42px;line-height:1.3;}
h2{font-size:28px;line-height:1.4;}
h3{font-size:20px;line-height:1.5;}
h4{font-size:17px;line-height:1.5;}
p{margin:0 0 14px;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(29,95,224,.28);outline-offset:2px;border-radius:6px;}

/* 侧栏 */
.side-nav{
  position:fixed;left:0;top:0;width:var(--sidebar-w);height:100vh;
  background:var(--card);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:22px 16px 20px;z-index:1040;
}
.brand{display:flex;align-items:center;gap:12px;padding:6px 8px 18px;border-bottom:1px solid var(--line);}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  background:var(--brand-50);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:18px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:16px;font-weight:600;color:var(--text);}
.brand-sub{font-size:12px;color:var(--muted);}
.side-nav-links{display:flex;flex-direction:column;gap:6px;margin-top:18px;flex:1 1 auto;}
.nav-item-link{
  position:relative;display:flex;align-items:center;gap:12px;
  height:44px;padding:0 14px;border-radius:10px;
  color:var(--text);font-size:15px;font-weight:500;transition:background var(--ease),color var(--ease);
}
.nav-item-link i{width:18px;font-size:16px;color:var(--muted);transition:color var(--ease);}
.nav-item-link:hover{background:var(--soft);color:var(--brand-700);text-decoration:none;}
.nav-item-link:hover i{color:var(--brand-600);}
.nav-item-link.active{background:var(--brand-50);color:var(--brand-700);}
.nav-item-link.active i{color:var(--brand-600);}
.nav-item-link.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:var(--brand-600);
}
.side-nav-foot{border-top:1px solid var(--line);padding-top:16px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;border:1px solid transparent;cursor:pointer;
  transition:background var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease),color var(--ease);
  text-decoration:none;
}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);text-decoration:none;}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--text);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--soft);color:var(--brand-700);text-decoration:none;}
.btn-block{width:100%;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}

/* 主区域 */
.main-area{margin-left:var(--sidebar-w);}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px;}
.section{padding:64px 0 0;}
.section:last-of-type{padding-bottom:0;}
.section-head{margin-bottom:28px;max-width:760px;}
.section-head h2{margin-bottom:10px;}
.section-head .lead{color:var(--muted);font-size:16px;margin:0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:500;color:var(--brand-700);
  background:var(--brand-50);border-radius:var(--radius-pill);padding:5px 14px;margin-bottom:16px;
}

/* 移动端顶栏 */
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:56px;z-index:1035;
  background:#fff;border-bottom:1px solid var(--line);align-items:center;justify-content:space-between;padding:0 16px;
}
.mobile-bar .brand{padding:0;border:0;}
.mobile-bar .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:15px;}
.hamburger{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  color:var(--text);font-size:16px;display:flex;align-items:center;justify-content:center;
}
.mobile-drawer{width:280px;}
.mobile-drawer .offcanvas-body{padding:16px;}
.mobile-drawer .side-nav-links{margin-top:12px;}
.drawer-foot{margin-top:18px;}
.drawer-brand{display:flex;align-items:center;gap:10px;padding-bottom:14px;border-bottom:1px solid var(--line);}

/* 顶部窄幅 Hero */
.hero-strip{
  position:relative;margin-top:32px;border-radius:20px;overflow:hidden;
  padding:56px 44px;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border:1px solid var(--line);
}
.hero-strip::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(255,255,255,.93),rgba(234,241,254,.88)),rgba(29,95,224,.08);
}
.hero-strip > *{position:relative;}
.hero-strip h1{margin-bottom:14px;max-width:880px;}
.hero-strip .hero-sub{font-size:17px;color:var(--muted);max-width:720px;margin:0;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13px;padding:6px 14px;border-radius:var(--radius-pill);
  background:#fff;border:1px solid var(--line);color:var(--muted);
}
.chip i{color:var(--brand-600);}
.crumb{font-size:13px;color:var(--muted);margin:20px 0 0;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand-600);}
.crumb .sep{margin:0 6px;}

/* 编号条目 */
.steps{display:flex;flex-direction:column;gap:20px;}
.step{
  display:grid;grid-template-columns:92px minmax(0,1.05fr) minmax(0,.95fr);
  gap:28px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-1);transition:box-shadow var(--ease),transform var(--ease);
}
.step:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.step--rev{grid-template-columns:92px minmax(0,.95fr) minmax(0,1.05fr);}
.step--rev .step-num{order:1;}
.step--rev .step-media{order:2;}
.step--rev .step-body{order:3;}
.step-num{
  width:84px;height:84px;border-radius:50%;
  border:2px solid rgba(29,95,224,.28);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;
  font-size:34px;font-weight:600;font-variant-numeric:tabular-nums;background:var(--soft);
}
.step-body h3{margin-bottom:10px;}
.step-body p{color:var(--muted);font-size:15px;margin-bottom:10px;}
.step-body p:last-of-type{margin-bottom:14px;}
.step-media img{width:100%;height:230px;object-fit:cover;border-radius:var(--radius-img);border:1px solid var(--line);}
.step-list li{display:flex;gap:9px;font-size:14px;color:var(--muted);margin-bottom:6px;}
.step-list i{color:var(--success);margin-top:4px;font-size:13px;}

/* 自查清单 */
.check-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.check-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;box-shadow:var(--shadow-1);transition:box-shadow var(--ease),transform var(--ease);
}
.check-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);}
.check-icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-50);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:14px;
}
.check-card h4{margin-bottom:8px;font-size:16px;}
.check-card p{font-size:14px;color:var(--muted);margin:0;}
.notice{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--brand-50);border-left:3px solid var(--brand-600);
  border-radius:12px;padding:18px 22px;margin-top:22px;
}
.notice i{color:var(--brand-600);font-size:17px;margin-top:3px;}
.notice p{margin:0;font-size:15px;color:var(--brand-700);}

/* 数据条 */
.stat-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:20px;}
.stat{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);padding:20px 22px;
}
.stat b{display:block;font-size:26px;font-weight:600;color:var(--brand-700);font-variant-numeric:tabular-nums;line-height:1.3;}
.stat span{font-size:13px;color:var(--muted);}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 22px;background:#fff;border:0;text-align:left;
  font-size:16px;font-weight:500;color:var(--text);cursor:pointer;
}
.faq-q:hover{background:var(--soft);}
.faq-q .faq-icon{color:var(--brand-600);font-size:14px;transition:transform var(--ease);}
.faq-q:not(.collapsed){color:var(--brand-700);}
.faq-q:not(.collapsed) .faq-icon{transform:rotate(45deg);}
.faq-a{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--muted);}

/* CTA */
.cta-band{
  background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:40px 44px;box-shadow:var(--shadow-1);
  display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:32px;align-items:center;
}
.cta-band h2{margin-bottom:12px;}
.cta-band p{color:var(--muted);margin:0;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}
.back-home{margin-top:22px;font-size:14px;color:var(--muted);}
.back-home a{font-weight:500;}

/* 页脚 */
.footer{margin-top:72px;background:#101B33;color:#C7D1E0;}
.footer .wrap{padding-top:56px;padding-bottom:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px;padding-bottom:40px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer .brand-mark{background:rgba(255,255,255,.1);color:#8FB4FF;}
.footer .brand-name{color:#fff;font-size:16px;font-weight:600;display:block;}
.footer .brand-sub{color:#8C9AB2;font-size:12px;display:block;}
.footer p{color:#9AA8BF;font-size:14px;margin:0;}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;}
.footer li{margin-bottom:10px;font-size:14px;}
.footer a{color:#C7D1E0;}
.footer a:hover{color:#fff;}
.footer-contact li{display:flex;gap:9px;align-items:flex-start;color:#9AA8BF;}
.footer-contact i{color:#8FB4FF;margin-top:5px;font-size:13px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#8C9AB2;
}

/* 响应式 */
@media (min-width:1400px){
  :root{--sidebar-w:272px;}
}
@media (max-width:1199.98px){
  .check-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-row{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:991.98px){
  :root{--sidebar-w:0px;}
  .side-nav{display:none;}
  .mobile-bar{display:flex;}
  .main-area{margin-left:0;padding-top:56px;}
  h1{font-size:32px;}
  h2{font-size:24px;}
  .hero-strip{padding:40px 26px;margin-top:24px;border-radius:16px;}
  .step,.step--rev{grid-template-columns:1fr;gap:18px;padding:22px;}
  .step--rev .step-num,.step--rev .step-media,.step--rev .step-body{order:0;}
  .step-num{width:64px;height:64px;font-size:26px;}
  .step-media img{height:200px;}
  .cta-band{grid-template-columns:1fr;padding:30px 26px;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
}
@media (max-width:575.98px){
  body{font-size:15px;}
  h1{font-size:28px;}
  h2{font-size:22px;}
  .wrap{padding:0 16px;}
  .section{padding-top:48px;}
  .check-grid{grid-template-columns:1fr;}
  .stat-row{grid-template-columns:1fr 1fr;}
  .hero-strip{padding:32px 20px;}
  .step-media img{height:180px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}

/* roulang page: category2 */
:root{
  --brand-600:#1D5FE0;
  --brand-700:#1749B0;
  --brand-500:#3B78EA;
  --brand-50:#EAF1FE;
  --brand-100:#D9E6FD;
  --accent-500:#FF7A45;
  --accent-50:#FFF1EA;
  --success:#12A88F;
  --warn:#D9534F;
  --bg:#F5F7FB;
  --card:#FFFFFF;
  --soft:#F8FAFF;
  --line:#E6EBF3;
  --text:#1B2432;
  --muted:#5E6B7F;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,40,80,.04),0 8px 24px -14px rgba(20,40,80,.12);
  --sh-2:0 2px 4px rgba(20,40,80,.06),0 16px 32px -16px rgba(20,40,80,.18);
  --side-w:248px;
  --gap-section:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  padding-top:56px;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;color:var(--text)}
h1{font-size:40px}
h2{font-size:28px}
h3{font-size:20px}
h4{font-size:17px}
p{margin:0 0 14px}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-700)}
img{max-width:100%;display:block}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(29,95,224,.28);outline-offset:2px}
.num{font-variant-numeric:tabular-nums}

/* ===== 侧栏 Shell ===== */
.side-shell{
  display:none;
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--side-w);
  background:var(--card);
  border-right:1px solid var(--line);
  z-index:1040;
}
.side-inner{
  height:100%;
  display:flex;
  flex-direction:column;
  padding:22px 16px 18px;
  overflow-y:auto;
}
.side-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;background:var(--brand-50);color:var(--brand-600);font-size:17px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:15px;font-weight:600;color:var(--text)}
.brand-sub{font-size:12px;color:var(--muted)}
.side-search{display:flex;gap:6px;margin-bottom:16px}
.side-search input{
  flex:1;height:36px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--soft);
  padding:0 14px;font-size:13px;color:var(--text);outline:none;
  transition:background .18s ease,border-color .18s ease;
}
.side-search input:focus{background:#fff;border-color:var(--brand-500)}
.side-search button{
  width:36px;height:36px;flex:0 0 36px;border:0;border-radius:var(--r-pill);
  background:var(--brand-600);color:#fff;font-size:13px;cursor:pointer;
  transition:background .18s ease;
}
.side-search button:hover{background:var(--brand-700)}
.side-nav{display:flex;flex-direction:column;gap:4px}
.side-nav .nav-item-link{
  position:relative;
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 12px;
  border-radius:10px;
  font-size:14.5px;font-weight:500;color:var(--muted);
  transition:background .18s ease,color .18s ease;
}
.side-nav .nav-item-link i{width:18px;text-align:center;font-size:15px}
.side-nav .nav-item-link::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:3px;background:transparent;
}
.side-nav .nav-item-link:hover{background:var(--soft);color:var(--text)}
.side-nav .nav-item-link.active{background:var(--brand-50);color:var(--brand-700);font-weight:600}
.side-nav .nav-item-link.active::before{background:var(--brand-600)}
.side-nav .nav-item-link.active i{color:var(--brand-600)}
.side-divider{height:1px;background:var(--line);margin:14px 0}
.side-cta{margin-top:auto;padding-top:18px}
.side-note{font-size:12.5px;color:var(--muted);line-height:1.7;margin-bottom:12px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:14.5px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--text)}
.btn-outline:hover{border-color:var(--brand-500);background:#F8FAFF;color:var(--brand-700)}
.btn-block{width:100%}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px}
.text-link{font-size:14.5px;font-weight:600;border-bottom:2px solid transparent;transition:border-color .18s ease}
.text-link:hover{border-color:currentColor}

/* ===== 移动端顶栏 ===== */
.topbar{
  position:fixed;top:0;left:0;right:0;height:56px;z-index:1050;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;background:#fff;border-bottom:1px solid var(--line);
}
.topbar .brand-name{font-size:14.5px}
.topbar .brand-sub{font-size:11.5px}
.hamburger{
  width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--text);font-size:16px;cursor:pointer;
}
.mobile-drawer{width:280px}
.mobile-drawer .offcanvas-header{border-bottom:1px solid var(--line);padding:16px}
.mobile-drawer .offcanvas-body{padding:16px}
.offcanvas{background:#fff}

/* ===== 主内容 ===== */
.main-shell{min-height:100vh}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:var(--gap-section) 0}
.section-tight{padding:48px 0}
.section-head{max-width:760px;margin-bottom:34px}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15.5px}
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;color:var(--brand-700);
  background:var(--brand-50);border-radius:var(--r-pill);
  padding:4px 12px;margin-bottom:14px;
}
.surface{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:box-shadow .18s ease,transform .18s ease;
}
.surface:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}

/* ===== 页头 ===== */
.page-head{
  background:linear-gradient(180deg,#FFFFFF 0%,#F5F8FE 100%);
  border-bottom:1px solid var(--line);
  padding:52px 0 44px;
}
.crumb{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:18px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand-600)}
.crumb .sep{color:#B9C3D4}
.page-head h1{max-width:860px;margin-bottom:16px}
.lede{max-width:780px;font-size:16.5px;color:var(--muted);margin-bottom:0}
.head-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  height:36px;padding:0 16px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--line);color:var(--muted);
  font-size:13.5px;font-weight:500;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.chip:hover{border-color:var(--brand-500);color:var(--brand-700)}
.chip.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.badge{
  display:inline-flex;align-items:center;gap:5px;
  font-size:12.5px;font-weight:600;padding:3px 11px;border-radius:var(--r-pill);
}
.badge-brand{background:var(--brand-50);color:var(--brand-700)}
.badge-accent{background:var(--accent-50);color:#C1502A}
.badge-soft{background:#EEF2F8;color:var(--muted)}

/* ===== 信息卡网格 ===== */
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.info-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  transition:box-shadow .18s ease,transform .18s ease;
}
.info-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.info-card .cover{aspect-ratio:16/9;overflow:hidden;background:#EEF2F8}
.info-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.info-card:hover .cover img{transform:scale(1.03)}
.info-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.info-body .row-top{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.info-body h3{font-size:18px;margin-bottom:10px}
.info-body p{font-size:14.5px;color:var(--muted);margin-bottom:14px}
.mini-list{margin-bottom:16px}
.mini-list li{
  position:relative;padding-left:20px;font-size:14px;color:var(--muted);margin-bottom:7px;
}
.mini-list li::before{
  content:"\f00c";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;left:0;top:1px;font-size:11px;color:var(--success);
}
.info-body .text-link{margin-top:auto}

/* ===== 对照表 ===== */
.table-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);overflow:hidden;
}
.table-scroll{overflow-x:auto}
.cmp-table{width:100%;border-collapse:collapse;min-width:680px;font-size:14.5px}
.cmp-table caption{
  text-align:left;padding:20px 22px 6px;font-size:13px;color:var(--muted);
}
.cmp-table thead th{
  background:var(--brand-50);color:var(--brand-700);
  font-weight:600;font-size:13.5px;text-align:left;
  padding:14px 22px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.cmp-table tbody td{
  padding:15px 22px;border-bottom:1px solid var(--line);color:var(--muted);vertical-align:top;
}
.cmp-table tbody td:first-child{color:var(--text);font-weight:600}
.cmp-table tbody tr:nth-child(even){background:#FAFCFF}
.cmp-table tbody tr:last-child td{border-bottom:0}
.cmp-table tbody tr:hover{background:var(--soft)}

/* ===== 突出提示条 ===== */
.notice{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--accent-50);border:1px solid #FFDDCB;border-radius:var(--r-card);
  padding:18px 20px;margin-top:22px;
}
.notice i{color:var(--accent-500);font-size:18px;margin-top:2px}
.notice p{margin:0;font-size:14.5px;color:#8A4A26}

/* ===== FAQ ===== */
.faq .accordion-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-1);
}
.faq .accordion-header{margin:0}
.faq .accordion-button{
  min-height:52px;padding:14px 20px;font-size:15.5px;font-weight:600;color:var(--text);
  background:#fff;border:0;box-shadow:none;display:flex;align-items:center;gap:12px;
}
.faq .accordion-button:not(.collapsed){color:var(--brand-700);background:var(--soft)}
.faq .accordion-button:focus{box-shadow:0 0 0 3px rgba(29,95,224,.18);z-index:2}
.faq .accordion-button::after{
  content:"\2b";font-family:inherit;font-size:20px;font-weight:400;line-height:1;
  color:var(--brand-600);background-image:none;width:auto;height:auto;margin-left:auto;
  transform:none;transition:transform .2s ease;
}
.faq .accordion-button:not(.collapsed)::after{content:"\2212";transform:rotate(180deg)}
.faq .accordion-body{padding:4px 20px 20px;font-size:15px;line-height:1.8;color:var(--muted)}

/* ===== CTA ===== */
.cta-band{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--sh-1);padding:38px 34px;
  display:grid;grid-template-columns:1.35fr 1fr;gap:32px;align-items:center;
}
.cta-band h2{font-size:26px;margin-bottom:12px}
.cta-band p{color:var(--muted);font-size:15px;margin-bottom:0}
.cta-actions{display:flex;flex-direction:column;gap:12px}
.cta-actions .btn{width:100%}
.cta-note{font-size:12.5px;color:var(--muted);text-align:center}
.back-home{
  display:inline-flex;align-items:center;gap:8px;margin-top:26px;
  font-size:14px;font-weight:600;color:var(--brand-600);
}

/* ===== 页脚 ===== */
.footer{background:#101B33;color:#C9D4E6;padding:56px 0 0;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:40px}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer p{font-size:13.5px;line-height:1.8;color:#94A3BC;margin:14px 0 0;max-width:340px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer .brand-mark{background:rgba(255,255,255,.09);color:#8FB4FF}
.footer .brand-name{color:#fff;font-size:15px}
.footer .brand-sub{color:#94A3BC;font-size:12px}
.footer ul li{margin-bottom:11px;font-size:13.5px}
.footer ul a{color:#C9D4E6}
.footer ul a:hover{color:#fff}
.footer-contact li{display:flex;gap:9px;align-items:flex-start;color:#94A3BC}
.footer-contact i{color:#8FB4FF;margin-top:4px;width:15px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:18px 0 22px;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:12.5px;color:#8595B0;
}

/* ===== 响应式 ===== */
@media (min-width:992px){
  body{padding-top:0}
  .topbar{display:none}
  .side-shell{display:block}
  .main-shell{margin-left:var(--side-w)}
}
@media (min-width:1400px){
  :root{--side-w:272px}
}
@media (max-width:1199.98px){
  :root{--gap-section:72px}
  .cta-band{grid-template-columns:1fr;gap:24px}
  .cta-actions{flex-direction:row}
  .cta-actions .btn{width:auto}
}
@media (max-width:991.98px){
  :root{--gap-section:64px}
  h1{font-size:34px}
  h2{font-size:24px}
  .page-head{padding:40px 0 34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:767.98px){
  .card-grid{grid-template-columns:1fr}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .cta-band{padding:26px 22px}
}
@media (max-width:575.98px){
  :root{--gap-section:48px}
  body{font-size:15.5px}
  h1{font-size:28px}
  h2{font-size:22px}
  h3{font-size:18px}
  .wrap{padding:0 16px}
  .info-body{padding:16px}
  .cmp-table thead th,.cmp-table tbody td{padding:13px 16px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer{padding-top:40px}
  .crumb{font-size:12.5px}
}