/* roulang page: index */
:root{
  --primary:#2A6F97;
  --primary-700:#1B5B7F;
  --primary-800:#124A69;
  --primary-400:#4E92B8;
  --primary-300:#8FBDD4;
  --primary-200:#D6E7F0;
  --primary-50:#EAF2F8;
  --accent:#C1543A;
  --bg:#F6F8FA;
  --card:#FFFFFF;
  --fill:#F2F6F9;
  --border:#E3E9EE;
  --divider:#EDF1F4;
  --text:#22333F;
  --text-2:#5A6B78;
  --text-3:#8B9AA6;
  --footer:#10222E;
  --success:#2E7D6B;
  --warn:#B98A2E;
  --danger:#C0392B;
  --r-sm:8px;
  --r:16px;
  --r-lg:24px;
  --r-btn:10px;
  --sh:0 1px 2px rgba(16,34,46,.04),0 8px 24px rgba(16,34,46,.06);
  --sh-hover:0 12px 32px rgba(16,34,46,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar-w:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-700)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:rgba(42,111,151,.18)}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--fill)}
::-webkit-scrollbar-thumb{background:#C7D6E0;border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:var(--primary)}

/* ---------- 左侧导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:#fff;border-right:1px solid var(--border);
  display:flex;flex-direction:column;
  padding:22px 16px 20px;
  z-index:100;transition:transform .24s var(--ease);
}
.sidebar::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary)}
.brand{display:flex;align-items:center;gap:12px;padding:6px 6px 18px;border-bottom:1px solid var(--divider)}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:10px;background:var(--primary);
  display:flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:20px;height:20px}
.brand-text{font-size:18px;font-weight:700;color:var(--primary);letter-spacing:-.01em;line-height:1.3}
.nav{padding:16px 0;display:flex;flex-direction:column;gap:4px;flex:1 1 auto;overflow-y:auto}
.nav-label{font-size:12px;color:var(--text-3);letter-spacing:.08em;padding:6px 14px 8px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 14px;border-radius:var(--r-btn);
  color:#38495A;font-size:14.5px;font-weight:500;
  transition:background .16s var(--ease),color .16s var(--ease);
}
.nav-item svg{width:20px;height:20px;flex:0 0 20px;transition:transform .16s var(--ease)}
.nav-item:hover{background:var(--fill);color:var(--primary)}
.nav-item:hover svg{transform:translateX(2px)}
.nav-item.active{background:var(--primary-50);color:var(--primary-700);font-weight:600}
.nav-item.active::before{content:"";position:absolute;left:-16px;top:8px;bottom:8px;width:3px;border-radius:0 3px 3px 0;background:var(--primary)}
.sidebar-foot{border-top:1px solid var(--divider);padding-top:16px}
.sidebar-note{margin-top:10px;font-size:13px;color:var(--text-3);text-align:center;line-height:1.6}

/* ---------- 顶部栏（移动端） ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:90;
  background:#fff;border-bottom:1px solid var(--border);
  align-items:center;gap:12px;padding:0 16px;
  transition:box-shadow .2s var(--ease);
}
.topbar.scrolled{box-shadow:0 2px 8px rgba(16,34,46,.06)}
.hamburger{
  width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--border);
  background:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .16s var(--ease),background .16s var(--ease);
}
.hamburger:hover{border-color:var(--primary);background:var(--primary-50)}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}
.topbar-brand{font-size:16px;font-weight:700;color:var(--primary);flex:1 1 auto;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.overlay{
  position:fixed;inset:0;background:rgba(16,34,46,.45);z-index:99;
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.overlay.show{opacity:1;visibility:visible}

/* ---------- 主内容 ---------- */
.main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;background:var(--bg)}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 40px}
.section{padding:104px 0}
.section.tight{padding-top:0}
.section-head{max-width:760px;margin-bottom:40px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--primary);background:rgba(42,111,151,.08);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
h1,h2,h3{letter-spacing:-.01em}
.section-title{font-size:26px;font-weight:700;line-height:1.4;color:var(--text)}
.section-sub{margin-top:14px;font-size:16px;color:var(--text-2)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:14.5px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(42,111,151,.22)}
.btn-primary:hover{background:var(--primary-700);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px rgba(42,111,151,.28)}
.btn-primary:active{transform:translateY(0);background:var(--primary-800)}
.btn-outline{background:#fff;border-color:#D6E0E7;color:var(--text)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}
.btn-accent-outline{background:#fff;border-color:rgba(193,84,58,.45);color:var(--accent)}
.btn-accent-outline:hover{background:rgba(193,84,58,.08);border-color:var(--accent)}
.btn-block{width:100%}
.btn-sm{height:40px;padding:0 16px;font-size:13.5px}
.btn:disabled{background:var(--border);color:var(--text-3);cursor:not-allowed;box-shadow:none;transform:none}
.text-link{font-size:14.5px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.text-link:hover{text-decoration:underline}
.text-link svg{width:16px;height:16px;transition:transform .18s var(--ease)}
.text-link:hover svg{transform:translateX(3px)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,var(--bg) 0%,#FFFFFF 100%);
  padding:88px 0 88px;
}
.hero::after{
  content:"";position:absolute;top:-120px;right:-80px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(42,111,151,.10) 0%,rgba(42,111,151,0) 70%);
  pointer-events:none;
}
.hero-arch{
  position:absolute;left:-40px;bottom:-120px;width:300px;height:360px;
  border:1px solid rgba(42,111,151,.12);border-radius:180px 180px 0 0;pointer-events:none;
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:56px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:var(--primary);background:rgba(42,111,151,.10);
  padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 0 4px rgba(46,125,107,.14)}
.hero-title{font-size:38px;font-weight:700;line-height:1.35;color:var(--text)}
.hero-sub{margin-top:20px;font-size:17px;color:var(--text-2);max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.hero-points{margin-top:30px;display:flex;flex-wrap:wrap;gap:10px 26px}
.hero-point{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2)}
.hero-point svg{width:18px;height:18px;flex:0 0 18px;color:var(--primary)}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);
  box-shadow:0 18px 44px rgba(16,34,46,.12);
}
.hero-float{
  position:absolute;left:-18px;bottom:22px;background:#fff;border:1px solid var(--border);
  border-radius:14px;padding:14px 18px;box-shadow:var(--sh);display:flex;align-items:center;gap:12px;
}
.hero-float strong{font-size:20px;color:var(--primary);font-weight:700;line-height:1.2}
.hero-float span{font-size:12.5px;color:var(--text-3);display:block;line-height:1.5}

/* ---------- 信任条 ---------- */
.trust-strip{
  background:var(--fill);border-radius:var(--r);min-height:88px;
  display:flex;align-items:center;gap:8px;padding:18px 24px;overflow-x:auto;
}
.trust-item{display:flex;align-items:center;gap:10px;flex:1 0 auto;padding:0 14px;white-space:nowrap}
.trust-item svg{width:22px;height:22px;color:var(--primary);flex:0 0 22px}
.trust-item span{font-size:14px;color:var(--text-2)}

/* ---------- 步骤 ---------- */
.steps-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:48px}
.steps-left{position:sticky;top:40px;align-self:start}
.steps-right{display:flex;flex-direction:column;gap:24px}
.step-row{
  display:flex;gap:20px;background:var(--card);border:1px solid var(--border);
  border-radius:var(--r);padding:24px;box-shadow:var(--sh);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.step-row:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.step-row:nth-child(2){margin-left:24px}
.step-num{
  width:48px;height:48px;flex:0 0 48px;border-radius:50%;border:2px solid var(--primary);
  color:var(--primary);font-weight:700;font-size:18px;
  display:flex;align-items:center;justify-content:center;
}
.step-body h3{font-size:18px;font-weight:600;color:var(--text)}
.step-body p{margin-top:8px;font-size:14.5px;color:var(--text-2)}

/* ---------- 能力模块 ---------- */
.cap-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:48px;align-items:start}
.cap-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.cap-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r);
  padding:24px;box-shadow:var(--sh);transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.cap-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.cap-icon{
  width:44px;height:44px;border-radius:12px;background:var(--primary-50);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.cap-icon svg{width:22px;height:22px;color:var(--primary)}
.cap-card h3{font-size:17px;font-weight:600}
.cap-card p{margin-top:8px;font-size:14px;color:var(--text-2)}
.cap-stats{margin-top:28px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 24px}
.cap-stat{border-left:3px solid var(--primary-200);padding-left:14px}
.cap-stat strong{display:block;font-size:26px;font-weight:700;color:var(--primary);line-height:1.3}
.cap-stat span{font-size:13px;color:var(--text-3)}

/* ---------- 案例 ---------- */
.case-top{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:48px;align-items:center}
.case-top img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;box-shadow:var(--sh)}
.case-text p{margin-top:16px;font-size:16px;color:var(--text-2)}
.quote{
  margin-top:24px;background:var(--fill);border-left:4px solid var(--primary);
  border-radius:0 12px 12px 0;padding:18px 20px;font-size:16px;color:var(--text);
}
.data-points{margin-top:28px;display:flex;gap:40px;flex-wrap:wrap}
.data-point strong{display:block;font-size:28px;font-weight:700;color:var(--primary);line-height:1.25}
.data-point span{font-size:13px;color:var(--text-3)}
.case-cards{margin-top:32px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.case-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r);
  overflow:hidden;box-shadow:var(--sh);display:block;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);color:inherit}
.case-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.case-card-body{padding:22px 24px 24px}
.case-card-body h3{margin-top:12px;font-size:17px;font-weight:600;color:var(--text)}
.case-card-body p{margin-top:8px;font-size:14px;color:var(--text-2)}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:13px;font-weight:600;color:var(--primary);background:rgba(42,111,151,.08);
}
.badge.accent{color:var(--accent);background:rgba(193,84,58,.10)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:14px;
  margin-bottom:12px;overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item.open{border-color:var(--primary-200);box-shadow:var(--sh)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;text-align:left;cursor:pointer;padding:14px 20px;
  font-size:16px;font-weight:600;color:var(--text);
}
.faq-q:hover{color:var(--primary)}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 18px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .22s var(--ease),opacity .22s var(--ease)}
.faq-item.open .faq-a{opacity:1}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--text-2);border-top:1px solid var(--divider);padding-top:16px}
.faq-item.open{background:#F7FAFC;border-left:3px solid var(--primary)}

/* ---------- 资讯列表 ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.news-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r);
  overflow:hidden;box-shadow:var(--sh);display:flex;flex-direction:column;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);color:inherit;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);color:inherit}
.news-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1 1 auto}
.news-title{
  margin-top:12px;font-size:17px;font-weight:600;line-height:1.5;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card:hover .news-title{color:var(--primary-700)}
.news-summary{
  margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);border-top:1px solid var(--divider);
}
.news-meta svg{width:16px;height:16px;color:var(--primary);transition:transform .2s var(--ease)}
.news-card:hover .news-meta svg{transform:translateX(3px)}
.news-card-wide{grid-column:span 3;flex-direction:row}
.news-card-wide img{width:40%;aspect-ratio:16/9;flex:0 0 40%}
.news-card-wide .news-body{width:60%;padding:24px 26px}
.news-card-wide .news-title{font-size:18px}
.empty-state{
  background:var(--card);border:1px dashed var(--border);border-radius:var(--r);
  min-height:230px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;padding:32px;
}
.empty-state svg{width:48px;height:48px;color:var(--primary-300)}
.empty-state p{font-size:14px;color:var(--text-2)}

/* ---------- 开通区 ---------- */
.cta-block{
  background:linear-gradient(135deg,var(--primary-800) 0%,var(--primary) 100%);
  padding:80px 0;color:#fff;
}
.cta-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:center}
.cta-left h2{font-size:28px;font-weight:700;line-height:1.4;color:#fff}
.cta-points{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.cta-point{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:rgba(255,255,255,.82)}
.cta-point svg{width:18px;height:18px;flex:0 0 18px;margin-top:5px;color:#fff}
.cta-note{margin-top:24px;font-size:13px;color:rgba(255,255,255,.62)}
.cta-form{
  background:#fff;border-radius:20px;padding:32px;
  box-shadow:0 16px 40px rgba(16,34,46,.14);
}
.cta-form h3{font-size:18px;font-weight:700;color:var(--text)}
.form-tip{margin-top:6px;font-size:13px;color:var(--text-3)}
.field{margin-top:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:6px}
.input,.select,.textarea{
  width:100%;height:44px;border:1px solid #D6E0E7;border-radius:var(--r-btn);
  padding:0 14px;font-size:14.5px;background:#fff;color:var(--text);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.textarea{height:auto;min-height:96px;padding:12px 14px;resize:vertical;line-height:1.7}
.select{appearance:none;background-image:url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235A6B78' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;background-size:18px;padding-right:38px}
.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(42,111,151,.14)}
.input.error,.textarea.error{border-color:var(--danger)}
.err-text{display:none;margin-top:6px;font-size:12px;color:var(--danger)}
.err-text.show{display:block}
.form-note{margin-top:14px;font-size:12px;color:var(--text-3);line-height:1.7}
.form-alert{
  display:none;margin-top:16px;border-radius:12px;border-left:3px solid var(--success);
  background:rgba(46,125,107,.10);padding:12px 14px;font-size:14px;color:var(--success);
}
.form-alert.show{display:block}
.cta-form .btn{margin-top:20px}

/* ---------- 页脚 ---------- */
.footer{background:var(--footer);color:rgba(255,255,255,.65);padding:64px 0 0;margin-top:auto}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:var(--primary)}
.footer-brand span{font-size:17px;font-weight:700;color:#fff}
.footer-col p{font-size:14px;color:rgba(255,255,255,.65);max-width:280px;line-height:1.8}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.9);margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.65);display:inline-block;transition:color .16s var(--ease),transform .16s var(--ease)}
.footer-col a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.5)}
.footer-bottom a:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  :root{--sidebar-w:264px}
  .container{padding:0 48px}
  .section{padding:120px 0}
}
@media (max-width:1279px){
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-card-wide{grid-column:span 2}
}
@media (max-width:1023px){
  .sidebar{transform:translateX(-100%);box-shadow:0 0 40px rgba(16,34,46,.18)}
  .sidebar.open{transform:translateX(0)}
  .topbar{display:flex}
  .main{margin-left:0;padding-top:60px}
  .hero{padding:56px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-title{font-size:30px}
  .steps-grid,.cap-grid,.case-top{grid-template-columns:1fr;gap:32px}
  .steps-left{position:static}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .section{padding:72px 0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .hero{padding:32px 0 48px}
  .hero-title{font-size:27px}
  .hero-actions .btn{width:100%}
  .hero-float{left:12px;bottom:12px}
  .step-row{padding:18px}
  .step-row:nth-child(2){margin-left:0}
  .step-num{width:40px;height:40px;flex:0 0 40px;font-size:16px}
  .cap-cards{grid-template-columns:1fr}
  .data-points{gap:20px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
  .case-cards{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .news-card-wide{grid-column:span 1;flex-direction:column}
  .news-card-wide img,.news-card-wide .news-body{width:100%;flex:auto}
  .cta-form{padding:20px}
  .cta-left h2{font-size:23px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .section-title{font-size:22px}
}
@media (max-width:519px){
  .hero-points{flex-direction:column;gap:8px}
  .trust-item{padding:0 10px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .news-card:hover,.case-card:hover,.step-row:hover,.cap-card:hover{transform:none}
}

/* roulang page: article */
:root{
  --primary:#2A6F97;
  --primary-700:#1B5B7F;
  --primary-800:#124A69;
  --primary-400:#4E92B8;
  --primary-300:#8FBDD4;
  --primary-200:#D6E7F0;
  --primary-50:#EAF2F8;
  --accent:#C1543A;
  --bg:#F6F8FA;
  --card:#FFFFFF;
  --fill:#F2F6F9;
  --border:#E3E9EE;
  --divider:#EDF1F4;
  --text:#22333F;
  --muted:#5A6B78;
  --weak:#8B9AA6;
  --footer:#10222E;
  --success:#2E7D6B;
  --warn:#B98A2E;
  --error:#C0392B;
  --radius-sm:8px;
  --radius:16px;
  --radius-lg:24px;
  --radius-btn:10px;
  --shadow:0 1px 2px rgba(16,34,46,.04), 0 8px 24px rgba(16,34,46,.06);
  --shadow-hover:0 12px 32px rgba(16,34,46,.10);
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --sidebar-w:240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--primary-700);}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
::selection{background:rgba(42,111,151,.18);}
*{scrollbar-width:thin;scrollbar-color:#C7D6E0 var(--fill);}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--fill);}
::-webkit-scrollbar-thumb{background:#C7D6E0;border-radius:999px;}
::-webkit-scrollbar-thumb:hover{background:var(--primary);}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

/* ============ 结构 ============ */
.container{max-width:1280px;margin:0 auto;padding:0 40px;}
.page{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;}
.main{flex:1;padding:40px 0 96px;}

/* ============ 侧栏导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;
  background:#fff;border-right:1px solid var(--border);
  display:flex;flex-direction:column;gap:14px;
  padding:22px 16px 18px;z-index:60;
}
.sidebar::before{content:"";position:absolute;left:0;top:0;width:3px;height:100%;background:var(--primary);}
.brand{display:flex;align-items:center;gap:10px;padding:2px 6px 0;}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:10px;background:var(--primary);
  display:flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{font-size:18px;font-weight:700;color:var(--primary);line-height:1.3;letter-spacing:-.01em;}
.side-divider{height:1px;background:var(--divider);margin:2px 0;}
.nav{display:flex;flex-direction:column;gap:4px;}
.nav-label{font-size:12px;letter-spacing:.08em;color:var(--weak);padding:0 14px 6px;}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 14px;border-radius:var(--radius-btn);
  font-size:14.5px;color:#38495A;transition:background var(--t),color var(--t);
}
.nav-item svg{width:20px;height:20px;flex:0 0 20px;transition:transform var(--t);}
.nav-item:hover{background:var(--fill);color:var(--primary);}
.nav-item:hover svg{transform:translateX(2px);}
.nav-item.active{background:var(--primary-50);color:var(--primary-700);font-weight:600;}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:999px;background:var(--primary);
}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;}
.side-note{font-size:13px;line-height:1.6;color:var(--weak);padding:0 4px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:1px solid transparent;border-radius:var(--radius-btn);
  font-size:14.5px;font-weight:600;cursor:pointer;
  transition:transform var(--t),box-shadow var(--t),background var(--t),border-color var(--t),color var(--t);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(42,111,151,.22);}
.btn-primary:hover{background:#2f7aa3;color:#fff;transform:translateY(-1px);box-shadow:0 10px 26px rgba(42,111,151,.28);}
.btn-primary:active{transform:translateY(0);background:var(--primary-700);}
.btn-outline{background:#fff;border-color:#D6E0E7;color:var(--text);}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--primary);
  font-size:14.5px;font-weight:600;
}
.btn-link::after{content:"→";transition:transform var(--t);}
.btn-link:hover::after{transform:translateX(3px);}
.btn:disabled{background:var(--border);color:var(--weak);cursor:not-allowed;}

/* ============ 移动端顶栏 ============ */
.topbar{display:none;}
.overlay{
  position:fixed;inset:0;background:rgba(16,34,46,.45);opacity:0;visibility:hidden;
  transition:opacity var(--t),visibility var(--t);z-index:55;
}
.overlay.show{opacity:1;visibility:visible;}
.hamburger{
  width:44px;height:44px;border:1px solid var(--border);border-radius:var(--radius-btn);
  background:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.hamburger svg{width:20px;height:20px;color:var(--text);}
.topbar-brand{display:flex;align-items:center;gap:8px;font-size:15.5px;font-weight:700;color:var(--primary);}

/* ============ 页头带 ============ */
.page-head{background:#fff;border-bottom:1px solid var(--border);padding:36px 0 32px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:14px;color:var(--weak);margin-bottom:16px;}
.breadcrumb a{color:var(--primary);}
.breadcrumb a:hover{text-decoration:underline;}
.breadcrumb .sep{color:#C4D0D9;}
.breadcrumb .current{color:var(--weak);}
.page-title{font-size:34px;line-height:1.35;max-width:860px;color:var(--text);}
.page-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:16px;font-size:13px;color:var(--weak);}
.page-meta .dot{color:#C4D0D9;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:rgba(42,111,151,.08);color:var(--primary);font-size:13px;font-weight:600;
}
.tag-accent{background:rgba(193,84,58,.10);color:var(--accent);}

/* ============ 阅读布局 ============ */
.reading-layout{display:block;}
.reading-main{min-width:0;}
.reading-side{margin-top:48px;display:flex;flex-direction:column;gap:20px;}

.article-cover{margin:0 0 32px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);background:var(--fill);}
.article-cover img{width:100%;aspect-ratio:16/7;object-fit:cover;}

/* ============ 长文排版 ============ */
.article-body{font-size:17px;line-height:1.9;color:var(--text);}
.article-body > * + *{margin-top:1.5em;}
.article-body p{margin:0;}
.article-body h2{
  font-size:25px;line-height:1.4;margin:2.2em 0 .8em;padding-left:12px;
  border-left:4px solid var(--primary);color:var(--text);
}
.article-body h3{font-size:20px;line-height:1.5;margin:1.8em 0 .6em;color:var(--text);}
.article-body h4{font-size:17px;font-weight:600;margin:1.6em 0 .5em;}
.article-body ul,.article-body ol{padding-left:1.4em;}
.article-body ul{list-style:none;padding-left:1.2em;}
.article-body ul > li{position:relative;margin:.5em 0;}
.article-body ul > li::before{
  content:"";position:absolute;left:-1.1em;top:.75em;width:6px;height:6px;
  border-radius:50%;background:var(--primary);
}
.article-body ol{list-style:decimal;}
.article-body ol > li{margin:.5em 0;padding-left:.2em;}
.article-body ol > li::marker{color:var(--primary);font-weight:700;}
.article-body blockquote{
  background:var(--fill);border-left:4px solid var(--primary);
  padding:20px;border-radius:0 12px 12px 0;color:#33485A;
}
.article-body blockquote p + p{margin-top:.8em;}
.article-body img{border-radius:12px;margin:1.6em auto;height:auto;}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:13px;color:var(--weak);text-align:center;margin-top:10px;}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--primary-700);}
.article-body strong{font-weight:700;}
.article-body hr{border:0;border-top:1px solid var(--divider);margin:2.4em 0;}
.article-body code{
  background:var(--fill);border-radius:6px;padding:2px 6px;font-size:15px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre{
  background:#F4F7F9;border:1px solid var(--border);border-radius:12px;
  padding:18px;overflow-x:auto;font-size:14.5px;line-height:1.7;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre code{background:none;padding:0;}
.article-body table{
  width:100%;border-collapse:collapse;font-size:15.5px;
  border:1px solid var(--border);border-radius:12px;overflow:hidden;
}
.article-body th{background:var(--fill);font-weight:600;text-align:left;}
.article-body th,.article-body td{border:1px solid var(--border);padding:12px 16px;vertical-align:top;}

/* ============ 空状态 ============ */
.empty-state{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:48px 28px;text-align:center;
}
.empty-state svg{width:52px;height:52px;color:var(--primary-300);margin:0 auto 16px;}
.empty-state h2{font-size:20px;margin-bottom:10px;}
.empty-state p{font-size:14px;color:var(--muted);margin-bottom:20px;}

/* ============ 侧栏卡 ============ */
.side-card{
  background:var(--fill);border-radius:var(--radius);padding:24px;border:1px solid var(--border);
}
.side-card h2{font-size:17px;line-height:1.5;margin-bottom:10px;}
.side-card p{font-size:14px;line-height:1.75;color:var(--muted);margin-bottom:18px;}
.side-eyebrow{font-size:12px;letter-spacing:.08em;color:var(--accent);font-weight:600;margin-bottom:8px;}
.side-links{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow);}
.side-links h3{font-size:15px;margin-bottom:12px;}
.side-links ul{list-style:none;display:flex;flex-direction:column;gap:10px;}
.side-links li a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:var(--muted);transition:color var(--t),transform var(--t);
}
.side-links li a::after{content:"→";color:var(--primary-300);transition:transform var(--t);}
.side-links li a:hover{color:var(--primary);transform:translateX(2px);}
.side-links li a:hover::after{transform:translateX(2px);}

/* ============ 文末 ============ */
.article-foot{
  margin-top:48px;padding-top:28px;border-top:1px solid var(--divider);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
}
.foot-note{font-size:14px;color:var(--muted);}
.related{margin-top:40px;}
.related h2{font-size:22px;margin-bottom:8px;}
.related .hint{
  font-size:14px;color:var(--muted);background:var(--fill);border-left:3px solid var(--primary-300);
  border-radius:12px;padding:14px 16px;
}
.related .hint a{color:var(--primary);font-weight:600;}

/* ============ 页脚 ============ */
.footer{background:var(--footer);color:rgba(255,255,255,.65);padding:64px 0 0;margin-top:auto;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.10);}
.footer-brand span{font-size:17px;font-weight:700;color:#fff;}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:280px;}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.9);margin-bottom:16px;}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px;}
.footer-col li a{
  font-size:14px;color:rgba(255,255,255,.65);display:inline-block;
  transition:color var(--t),transform var(--t);
}
.footer-col li a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
  margin-top:48px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (min-width:1280px){
  .reading-layout{
    display:grid;grid-template-columns:minmax(0,780px) 300px;
    gap:56px;justify-content:center;align-items:start;
  }
  .reading-side{margin-top:0;position:sticky;top:32px;}
}
@media (max-width:1279px){
  .reading-main{max-width:780px;margin:0 auto;}
  .reading-side{max-width:780px;margin:48px auto 0;}
}
@media (min-width:1440px){
  :root{--sidebar-w:264px;}
  .container{padding:0 48px;}
}
@media (max-width:1023px){
  .topbar{
    display:flex;position:fixed;top:0;left:0;right:0;height:60px;align-items:center;gap:12px;
    padding:0 14px;background:#fff;border-bottom:1px solid var(--border);z-index:50;
    transition:box-shadow var(--t);
  }
  .topbar.scrolled{box-shadow:0 2px 8px rgba(16,34,46,.06);}
  .topbar .spacer{flex:1;}
  .sidebar{
    width:280px;transform:translateX(-100%);
    transition:transform 240ms cubic-bezier(.2,.7,.3,1);
    box-shadow:0 12px 40px rgba(16,34,46,.16);
  }
  .sidebar.open{transform:translateX(0);}
  .page{margin-left:0;padding-top:60px;}
  .page-title{font-size:30px;}
  .article-body h2{font-size:22px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .main{padding:28px 0 64px;}
  .page-head{padding:26px 0 24px;}
  .page-title{font-size:26px;}
  .article-body{font-size:16.5px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .footer{padding-top:48px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .article-foot{flex-direction:column;align-items:stretch;}
  .article-foot .btn{width:100%;}
}
@media (max-width:520px){
  .page-title{font-size:24px;}
  .side-card{padding:18px;}
  .article-cover img{aspect-ratio:4/3;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
  --primary:#2A6F97;
  --primary-700:#1B5B7F;
  --primary-800:#124A69;
  --primary-400:#4E92B8;
  --primary-300:#8FBDD4;
  --primary-200:#D6E7F0;
  --primary-50:#EAF2F8;
  --accent:#C1543A;
  --bg:#F6F8FA;
  --card:#FFFFFF;
  --fill:#F2F6F9;
  --border:#E3E9EE;
  --divider:#EDF1F4;
  --text:#22333F;
  --text-2:#5A6B78;
  --text-3:#8B9AA6;
  --footer-bg:#10222E;
  --success:#2E7D6B;
  --warn:#B98A2E;
  --error:#C0392B;
  --radius-sm:8px;
  --radius-card:16px;
  --radius-lg:24px;
  --radius-btn:10px;
  --shadow-card:0 1px 2px rgba(16,34,46,.04),0 8px 24px rgba(16,34,46,.06);
  --shadow-hover:0 12px 32px rgba(16,34,46,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar-w:240px;
  --container:1280px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color 180ms var(--ease)}
a:hover{color:var(--primary-700)}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:-.01em}
h1{font-size:34px;line-height:1.35}
h2{font-size:26px;line-height:1.4}
h3{font-size:19px;line-height:1.5;font-weight:600}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
::selection{background:rgba(42,111,151,.18)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--fill)}
::-webkit-scrollbar-thumb{background:#C7D6E0;border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:var(--primary)}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}

/* ============ 布局骨架 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:#fff;
  border-right:1px solid var(--border);
  display:flex;
  flex-direction:column;
  padding:22px 16px 20px;
  z-index:80;
}
.sidebar::before{
  content:"";
  position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--primary);
}
.brand{
  display:flex;align-items:center;gap:10px;
  padding:0 6px 18px;
  border-bottom:1px solid var(--divider);
}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;
  border-radius:10px;
  background:var(--primary);
  display:flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:22px;height:22px}
.brand-text{font-size:18px;font-weight:700;color:var(--primary);letter-spacing:-.01em}
.nav-label{
  font-size:12px;color:var(--text-3);
  letter-spacing:.08em;
  padding:18px 12px 8px;
}
.nav{display:flex;flex-direction:column;gap:4px}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  height:44px;padding:0 14px;
  border-radius:var(--radius-btn);
  font-size:14.5px;color:#38495A;
  transition:background 160ms var(--ease),color 160ms var(--ease);
}
.nav-item svg{width:20px;height:20px;flex:0 0 20px;transition:transform 160ms var(--ease)}
.nav-item:hover{background:var(--fill);color:var(--primary)}
.nav-item:hover svg{transform:translateX(2px)}
.nav-item.active{
  background:var(--primary-50);
  color:var(--primary-700);
  font-weight:600;
}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;
  border-radius:2px;background:var(--primary);
}
.sidebar-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--divider)}
.sidebar-note{
  margin-top:10px;
  font-size:13px;line-height:1.6;color:var(--text-3);
}
.main{margin-left:var(--sidebar-w);min-height:100vh}
.container{max-width:var(--container);margin:0 auto;padding:0 40px}

/* ============ 移动端顶栏 ============ */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:60px;
  background:#fff;border-bottom:1px solid var(--border);
  align-items:center;gap:12px;padding:0 16px;z-index:90;
}
.topbar.scrolled{box-shadow:0 2px 8px rgba(16,34,46,.06)}
.topbar-toggle{
  width:44px;height:44px;border:1px solid var(--border);background:#fff;
  border-radius:12px;display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:border-color 180ms var(--ease),background 180ms var(--ease);
}
.topbar-toggle:hover{border-color:var(--primary);background:var(--primary-50)}
.topbar-toggle svg{width:20px;height:20px}
.topbar-brand{
  display:flex;align-items:center;gap:8px;
  font-size:15px;font-weight:700;color:var(--primary);white-space:nowrap;
}
.topbar-brand .brand-mark{width:30px;height:30px;flex:0 0 30px;border-radius:8px}
.topbar-brand .brand-mark svg{width:18px;height:18px}
.topbar-spacer{flex:1}
.overlay{
  display:none;position:fixed;inset:0;
  background:rgba(16,34,46,.45);z-index:75;
  opacity:0;transition:opacity 240ms var(--ease);
}
.overlay.show{display:block;opacity:1}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:14.5px;font-weight:600;
  cursor:pointer;
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),background 180ms var(--ease),border-color 180ms var(--ease),color 180ms var(--ease);
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:#3179A1;color:#fff;transform:translateY(-1px);box-shadow:0 10px 24px rgba(42,111,151,.24)}
.btn-primary:active{transform:translateY(0);background:var(--primary-700)}
.btn-ghost{background:#fff;border-color:#D6E0E7;color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}
.btn-outline{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-50);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn[disabled]{background:var(--border);color:var(--text-3);cursor:not-allowed;transform:none;box-shadow:none}

/* ============ 页头 ============ */
.page-head{
  background:linear-gradient(180deg,#F6F8FA 0%,#FFFFFF 100%);
  border-bottom:1px solid var(--divider);
  padding:40px 0 48px;
  position:relative;
  overflow:hidden;
}
.page-head::after{
  content:"";
  position:absolute;right:-80px;top:-120px;width:340px;height:340px;
  border-radius:50%;background:rgba(42,111,151,.08);
}
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:14px;color:var(--text-3);
  position:relative;z-index:1;
}
.crumb a{color:var(--primary)}
.crumb a:hover{text-decoration:underline}
.crumb span.sep{color:var(--text-3)}
.crumb .current{color:var(--text-3)}
.page-head h1{margin-top:18px;max-width:860px;position:relative;z-index:1}
.lede{
  margin-top:16px;max-width:760px;
  font-size:16.5px;line-height:1.85;color:var(--text-2);
  position:relative;z-index:1;
}
.head-meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;
  position:relative;z-index:1;
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;
  border-radius:999px;
  font-size:13px;line-height:1;
  background:rgba(42,111,151,.08);
  color:var(--primary);
}
.badge-accent{background:rgba(193,84,58,.10);color:var(--accent)}

/* ============ 版块通用 ============ */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{max-width:760px;margin-bottom:36px}
.section-head p{margin-top:12px;color:var(--text-2);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--primary);font-weight:600;
  letter-spacing:.06em;margin-bottom:12px;
}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--primary)}

/* ============ 概览区（左粘性目录 + 右图文） ============ */
.overview-grid{
  display:grid;
  grid-template-columns:240px 1fr;
  gap:48px;
  align-items:start;
}
.toc{
  position:sticky;top:32px;
  background:var(--fill);
  border-radius:var(--radius-card);
  padding:18px 14px;
}
.toc-title{font-size:13px;font-weight:600;color:var(--text-3);padding:0 10px 10px;letter-spacing:.06em}
.toc a{
  display:flex;align-items:center;
  height:40px;padding:0 12px;margin-bottom:2px;
  border-radius:10px;
  font-size:14px;color:#41525F;
  transition:background 160ms var(--ease),color 160ms var(--ease);
}
.toc a:hover{background:#fff;color:var(--primary)}
.toc a.active{
  background:#fff;color:var(--primary-700);font-weight:600;
  box-shadow:inset 3px 0 0 var(--primary);
}
.toc-foot{
  margin-top:14px;padding:14px 12px 4px;
  border-top:1px solid #E1E9EF;
  font-size:13px;color:var(--text-3);line-height:1.7;
}

.feature-block{scroll-margin-top:32px}
.feature-block + .feature-block{margin-top:64px}
.feature-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:36px;
  align-items:center;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:28px;
  box-shadow:var(--shadow-card);
  transition:box-shadow 220ms var(--ease),transform 220ms var(--ease);
}
.feature-row:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.feature-row.is-reverse .feature-media{order:2}
.feature-media{
  border-radius:var(--radius-card);
  overflow:hidden;
  aspect-ratio:16/10;
  background:var(--fill);
}
.feature-media img{width:100%;height:100%;object-fit:cover}
.feature-index{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--accent);letter-spacing:.06em;
  margin-bottom:10px;
}
.feature-index::before{content:"";width:14px;height:2px;border-radius:2px;background:var(--accent)}
.feature-body h3{font-size:20px}
.feature-body p{margin-top:14px;font-size:15.5px;line-height:1.85;color:var(--text-2)}
.stat-strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:8px;
  margin-top:20px;padding:16px 18px;
  background:var(--fill);
  border-radius:12px;
}
.stat-strip .num{font-size:22px;font-weight:700;color:var(--primary);line-height:1.3;font-variant-numeric:tabular-nums}
.stat-strip .lab{font-size:13px;color:var(--text-3);line-height:1.6}

/* ============ 模块清单 ============ */
.module-section{background:#fff;border-top:1px solid var(--divider);border-bottom:1px solid var(--divider)}
.module-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px 32px;
}
.module-item{
  display:flex;gap:16px;
  padding:18px 20px;
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  background:#fff;
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease),transform 180ms var(--ease);
}
.module-item:hover{border-color:var(--primary-200);box-shadow:var(--shadow-card);transform:translateY(-2px)}
.module-no{
  flex:0 0 40px;height:40px;width:40px;
  border-radius:12px;
  background:var(--primary-50);
  color:var(--primary-700);
  font-size:14px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.module-item h3{font-size:17px}
.module-item p{margin-top:6px;font-size:14px;color:var(--text-2);line-height:1.75}

/* ============ 数据条 ============ */
.metric-band{
  background:var(--fill);
  border-radius:var(--radius-lg);
  padding:36px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.metric{padding-right:16px;border-right:1px solid #E1E9EF}
.metric:last-child{border-right:0;padding-right:0}
.metric .value{font-size:28px;font-weight:700;color:var(--primary);line-height:1.25;font-variant-numeric:tabular-nums}
.metric .label{margin-top:8px;font-size:13px;color:var(--text-3)}
.metric .desc{margin-top:6px;font-size:14px;color:var(--text-2);line-height:1.7}

/* ============ 提示条 ============ */
.notice{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 16px;
  border-radius:12px;
  border-left:3px solid var(--primary);
  background:rgba(42,111,151,.07);
  font-size:14px;color:var(--text-2);line-height:1.75;
}
.notice strong{color:var(--primary-700)}

/* ============ 页尾 CTA ============ */
.cta-band{
  background:linear-gradient(135deg,var(--primary-50) 0%,#FFFFFF 100%);
  border:1px solid var(--primary-200);
  border-radius:var(--radius-lg);
  padding:40px;
  display:flex;align-items:center;gap:32px;justify-content:space-between;
  flex-wrap:wrap;
}
.cta-band h2{font-size:24px;max-width:560px}
.cta-band p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:620px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.footer{background:var(--footer-bg);color:rgba(255,255,255,.65);padding:64px 0 28px;margin-top:88px}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand span{font-size:17px;font-weight:700;color:#fff}
.footer-brand .brand-mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px}
.footer-brand .brand-mark svg{width:19px;height:19px}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.65);max-width:300px}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.9);margin-bottom:16px}
.footer-col ul li + li{margin-top:10px}
.footer-col ul a{
  font-size:14px;color:rgba(255,255,255,.65);
  display:inline-block;transition:color 180ms var(--ease),transform 180ms var(--ease);
}
.footer-col ul a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  margin-top:44px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (min-width:1440px){
  :root{--sidebar-w:264px}
  .container{padding:0 48px}
}
@media (max-width:1279px){
  .overview-grid{grid-template-columns:210px 1fr;gap:32px}
  .metric-band{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 20px}
  .metric:nth-child(2n){border-right:0;padding-right:0}
}
@media (max-width:1023px){
  .sidebar{
    transform:translateX(-100%);
    transition:transform 240ms var(--ease);
    width:280px;
    box-shadow:0 0 40px rgba(16,34,46,.18);
  }
  .sidebar.open{transform:translateX(0)}
  .topbar{display:flex}
  .main{margin-left:0;padding-top:60px}
  .container{padding:0 24px}
  .feature-row{grid-template-columns:1fr;gap:22px;padding:22px}
  .feature-row.is-reverse .feature-media{order:0}
  .overview-grid{grid-template-columns:1fr;gap:28px}
  .toc{position:static;display:flex;gap:8px;overflow-x:auto;padding:12px}
  .toc-title{display:none}
  .toc a{height:38px;white-space:nowrap;margin-bottom:0;background:#fff;box-shadow:none}
  .toc a.active{box-shadow:inset 0 -2px 0 var(--primary)}
  .toc-foot{display:none}
  .module-grid{grid-template-columns:1fr}
  .section{padding:64px 0}
}
@media (max-width:767px){
  h1{font-size:28px}
  h2{font-size:22px}
  .section{padding:52px 0}
  .container{padding:0 20px}
  .page-head{padding:28px 0 36px}
  .cta-band{padding:24px;gap:20px}
  .cta-band h2{font-size:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .metric-band{grid-template-columns:1fr;padding:24px}
  .metric{border-right:0;padding-right:0}
  .stat-strip{grid-template-columns:1fr 1fr;gap:14px}
  .feature-row{padding:18px}
  .footer{padding:48px 0 24px;margin-top:64px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-col:first-child{grid-column:1 / -1}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  h1{font-size:26px}
  .head-meta{gap:8px}
  .footer-grid{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none !important;animation:none !important}
}

/* roulang page: category3 */
:root{
    --primary:#2A6F97;
    --primary-700:#1B5B7F;
    --primary-800:#124A69;
    --primary-400:#4E92B8;
    --primary-300:#8FBDD4;
    --primary-200:#D6E7F0;
    --primary-50:#EAF2F8;
    --accent:#C1543A;
    --accent-soft:rgba(193,84,58,.10);
    --bg:#F6F8FA;
    --card:#FFFFFF;
    --fill:#F2F6F9;
    --border:#E3E9EE;
    --divider:#EDF1F4;
    --text:#22333F;
    --text-2:#5A6B78;
    --text-3:#8B9AA6;
    --footer-bg:#10222E;
    --success:#2E7D6B;
    --warn:#B98A2E;
    --radius-s:8px;
    --radius:16px;
    --radius-lg:24px;
    --radius-btn:10px;
    --shadow:0 1px 2px rgba(16,34,46,.04), 0 8px 24px rgba(16,34,46,.06);
    --shadow-hover:0 12px 32px rgba(16,34,46,.10);
    --t:180ms cubic-bezier(.2,.7,.3,1);
    --sidebar:240px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Inter",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border:0;}
  a{color:var(--primary);text-decoration:none;transition:color var(--t);}
  a:hover{color:var(--primary-700);}
  button{font-family:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding:0;list-style:none;}
  ::selection{background:rgba(42,111,151,.18);}
  *{scrollbar-width:thin;scrollbar-color:#C7D6E0 #F2F6F9;}
  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-track{background:#F2F6F9;}
  ::-webkit-scrollbar-thumb{background:#C7D6E0;border-radius:999px;border:2px solid #F2F6F9;}
  ::-webkit-scrollbar-thumb:hover{background:var(--primary-400);}

  .container{max-width:1280px;margin:0 auto;padding:0 40px;}

  /* ---------- 侧栏导航 ---------- */
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;width:var(--sidebar);
    background:#fff;border-right:1px solid var(--border);
    display:flex;flex-direction:column;padding:22px 16px 20px;
    z-index:70;transition:transform 240ms cubic-bezier(.2,.7,.3,1);
  }
  .sidebar::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary);}
  .brand{display:flex;align-items:center;gap:10px;padding:4px 6px 0;}
  .brand-mark{
    width:36px;height:36px;border-radius:10px;background:var(--primary);
    display:flex;align-items:center;justify-content:center;flex:0 0 36px;
    box-shadow:0 4px 12px rgba(42,111,151,.28);
  }
  .brand-mark svg{width:20px;height:20px;}
  .brand-name{font-size:18px;font-weight:700;color:var(--primary);letter-spacing:-.01em;line-height:1.3;}
  .sidebar hr{border:0;border-top:1px solid var(--divider);margin:18px 6px;}
  .nav{display:flex;flex-direction:column;gap:4px;}
  .nav-label{font-size:12px;letter-spacing:.12em;color:var(--text-3);padding:0 14px 8px;font-weight:600;}
  .nav-item{
    display:flex;align-items:center;gap:10px;
    height:44px;padding:0 14px;border-radius:10px;
    font-size:14.5px;color:#38495A;position:relative;
    transition:background var(--t),color var(--t);
  }
  .nav-item svg{width:20px;height:20px;flex:0 0 20px;transition:transform 160ms ease;}
  .nav-item:hover{background:var(--fill);color:var(--primary);}
  .nav-item:hover svg{transform:translateX(2px);}
  .nav-item.active{background:var(--primary-50);color:var(--primary-700);font-weight:600;}
  .nav-item.active::before{
    content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
    border-radius:999px;background:var(--primary);
  }
  .sidebar-foot{margin-top:auto;padding-top:18px;}
  .sidebar-foot .btn{width:100%;}
  .sidebar-note{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;line-height:1.6;}

  /* ---------- 移动顶栏 ---------- */
  .topbar{
    display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:65;
    background:#fff;border-bottom:1px solid var(--border);
    align-items:center;gap:12px;padding:0 16px;
    transition:box-shadow var(--t);
  }
  .topbar.scrolled{box-shadow:0 2px 8px rgba(16,34,46,.06);}
  .menu-btn{
    width:44px;height:44px;border-radius:10px;border:1px solid var(--border);
    background:#fff;display:flex;align-items:center;justify-content:center;
    color:var(--primary-700);cursor:pointer;flex:0 0 44px;
  }
  .menu-btn:hover{background:var(--primary-50);border-color:var(--primary-200);}
  .topbar-brand{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:700;color:var(--primary);min-width:0;}
  .topbar-brand .brand-mark{width:30px;height:30px;flex:0 0 30px;border-radius:9px;}
  .topbar-brand .brand-mark svg{width:17px;height:17px;}
  .topbar-brand span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .topbar .btn{margin-left:auto;height:40px;padding:0 16px;font-size:14px;}
  .overlay{
    position:fixed;inset:0;background:rgba(16,34,46,.45);
    opacity:0;visibility:hidden;transition:opacity 240ms ease,visibility 240ms ease;z-index:68;
  }
  .overlay.show{opacity:1;visibility:visible;}

  /* ---------- 主内容 ---------- */
  .page{margin-left:var(--sidebar);min-height:100vh;display:flex;flex-direction:column;}
  .main{flex:1;}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:var(--radius-btn);
    font-size:14.5px;font-weight:600;cursor:pointer;border:1px solid transparent;
    transition:transform var(--t),box-shadow var(--t),background var(--t),border-color var(--t),color var(--t);
    text-align:center;white-space:nowrap;
  }
  .btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(42,111,151,.22);}
  .btn-primary:hover{background:#2F7BA5;color:#fff;transform:translateY(-1px);box-shadow:0 10px 26px rgba(42,111,151,.28);}
  .btn-primary:active{background:var(--primary-700);transform:none;}
  .btn-ghost{background:#fff;color:var(--text);border-color:#D6E0E7;}
  .btn-ghost:hover{border-color:var(--primary);color:var(--primary-700);transform:translateY(-1px);}
  .btn-sm{height:40px;padding:0 18px;font-size:14px;}
  .btn:focus-visible,.menu-btn:focus-visible,.nav-item:focus-visible{
    outline:2px solid var(--primary);outline-offset:2px;
  }
  .link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--primary);}
  .link-arrow:hover{color:var(--primary-700);text-decoration:underline;}
  .link-arrow svg{width:16px;height:16px;transition:transform var(--t);}
  .link-arrow:hover svg{transform:translateX(3px);}

  /* ---------- 页头带 ---------- */
  .page-head{
    position:relative;overflow:hidden;
    background:linear-gradient(180deg,#F6F8FA 0%,#FFFFFF 100%);
    border-bottom:1px solid var(--divider);
    padding:44px 0 52px;
  }
  .page-head::after{
    content:"";position:absolute;top:-120px;right:-80px;width:340px;height:340px;
    border-radius:50%;background:rgba(42,111,151,.08);
  }
  .page-head::before{
    content:"";position:absolute;left:40px;bottom:26px;width:150px;height:150px;
    border:1px solid rgba(42,111,151,.14);border-radius:120px 120px 0 0;
    border-bottom:0;pointer-events:none;
  }
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:14px;color:var(--text-3);position:relative;z-index:2;margin-bottom:18px;
  }
  .breadcrumb a{color:var(--primary);}
  .breadcrumb a:hover{text-decoration:underline;}
  .breadcrumb .sep{color:var(--text-3);}
  .breadcrumb .current{color:var(--text-3);}
  .page-head h1{
    position:relative;z-index:2;
    font-size:38px;font-weight:700;line-height:1.35;letter-spacing:-.01em;
    max-width:840px;
  }
  .page-head .lede{
    position:relative;z-index:2;margin-top:18px;max-width:760px;
    font-size:16.5px;color:var(--text-2);line-height:1.85;
  }
  .head-badges{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}

  .badge{
    display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
    font-size:13px;background:rgba(42,111,151,.08);color:var(--primary-700);line-height:1;
  }
  .badge-accent{background:var(--accent-soft);color:var(--accent);}

  /* ---------- 板块 ---------- */
  section{padding:88px 0;}
  .section-tight{padding:56px 0 0;}
  .section-head{max-width:760px;margin-bottom:34px;}
  .section-head h2{
    font-size:26px;font-weight:700;line-height:1.4;letter-spacing:-.01em;
    display:flex;align-items:center;gap:12px;
  }
  .section-head h2::before{
    content:"";width:4px;height:24px;border-radius:999px;background:var(--primary);flex:0 0 4px;
  }
  .section-head p{margin-top:14px;color:var(--text-2);font-size:16px;}
  .eyebrow{
    font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--accent);margin-bottom:12px;
  }

  /* 数据条 */
  .stat-band{
    display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
    background:var(--fill);border-radius:var(--radius);padding:28px 32px;
    border:1px solid var(--border);
  }
  .stat-item{display:flex;flex-direction:column;gap:2px;}
  .stat-num{font-size:28px;font-weight:700;color:var(--primary);line-height:1.2;letter-spacing:-.01em;}
  .stat-label{font-size:13px;color:var(--text-3);}
  .notice{
    display:flex;gap:12px;align-items:flex-start;
    background:rgba(185,138,46,.10);border-left:3px solid var(--warn);
    border-radius:12px;padding:14px 16px;font-size:14px;color:var(--text-2);
    margin-top:20px;line-height:1.75;
  }
  .notice svg{width:20px;height:20px;flex:0 0 20px;color:var(--warn);margin-top:2px;}

  /* 图文区 */
  .split{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;}
  .split figure{margin:0;}
  .split img{border-radius:20px;aspect-ratio:16/10;object-fit:cover;width:100%;box-shadow:var(--shadow);}
  .check-list{margin-top:22px;display:flex;flex-direction:column;gap:14px;}
  .check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--text-2);}
  .check-list svg{width:20px;height:20px;flex:0 0 20px;color:var(--primary);margin-top:4px;}
  .check-list strong{color:var(--text);font-weight:600;}

  /* ---------- 对照表 ---------- */
  .compare-wrap{
    background:#fff;border:1px solid var(--border);border-radius:var(--radius);
    box-shadow:var(--shadow);overflow:hidden;
  }
  table.compare{width:100%;border-collapse:collapse;font-size:15px;}
  table.compare thead th{
    background:var(--fill);text-align:left;padding:14px 20px;
    font-size:14px;font-weight:600;color:var(--text-2);letter-spacing:.02em;
  }
  table.compare th:first-child,table.compare td:first-child{width:30%;}
  table.compare td{
    padding:16px 20px;border-top:1px solid var(--divider);
    color:var(--text-2);line-height:1.75;vertical-align:top;
  }
  table.compare td:first-child{color:var(--text);font-weight:600;}
  table.compare td span.tag{
    display:inline-block;margin-left:8px;padding:1px 8px;border-radius:999px;
    font-size:12px;font-weight:500;background:rgba(42,111,151,.08);color:var(--primary-700);
  }
  table.compare tbody tr{transition:background var(--t);}
  table.compare tbody tr:hover{background:#F7FAFC;}

  /* 移动端属性卡 */
  .compare-cards{display:none;flex-direction:column;gap:12px;}
  .compare-card{
    background:#fff;border:1px solid var(--border);border-radius:14px;
    padding:16px 18px;box-shadow:var(--shadow);
  }
  .compare-card .k{
    font-size:14px;font-weight:600;color:var(--primary-700);
    padding-bottom:8px;margin-bottom:10px;border-bottom:1px dashed var(--divider);
  }
  .compare-card .v{font-size:14.5px;color:var(--text-2);line-height:1.75;}

  /* ---------- 案例卡 ---------- */
  .case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
  .case-card{
    display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);
    border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);
    transition:transform var(--t),box-shadow var(--t),border-color var(--t);
  }
  .case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--primary-200);}
  .case-card .cover{border-radius:12px;overflow:hidden;aspect-ratio:16/9;margin-bottom:16px;background:var(--fill);}
  .case-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease;}
  .case-card:hover .cover img{transform:scale(1.04);}
  .case-card h3{font-size:17px;font-weight:600;line-height:1.5;color:var(--text);}
  .case-card p{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.75;}
  .case-foot{
    margin-top:16px;padding-top:14px;border-top:1px solid var(--divider);
    display:flex;align-items:center;justify-content:space-between;gap:12px;
  }
  .case-foot .arrow{
    width:34px;height:34px;border-radius:50%;background:var(--primary-50);color:var(--primary-700);
    display:flex;align-items:center;justify-content:center;transition:transform var(--t),background var(--t);
  }
  .case-foot .arrow svg{width:16px;height:16px;}
  .case-card:hover .arrow{background:var(--primary);color:#fff;transform:translateX(3px);}

  /* ---------- 页尾 CTA ---------- */
  .cta-lite{
    background:var(--fill);border:1px solid var(--border);border-radius:20px;
    padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  }
  .cta-lite h2{font-size:24px;font-weight:700;line-height:1.4;}
  .cta-lite p{margin-top:10px;font-size:15px;color:var(--text-2);max-width:640px;}
  .cta-lite .actions{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto;}

  /* ---------- 页脚 ---------- */
  .footer{background:var(--footer-bg);color:rgba(255,255,255,.65);margin-top:8px;}
  .footer-grid{
    display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
    padding:64px 0 40px;
  }
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
  .footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;background:var(--primary);}
  .footer-brand span{font-size:17px;font-weight:700;color:#fff;}
  .footer-col p{font-size:14px;line-height:1.75;color:rgba(255,255,255,.65);max-width:280px;}
  .footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.9);margin-bottom:16px;}
  .footer-col ul{display:flex;flex-direction:column;gap:10px;}
  .footer-col ul a{
    font-size:14px;color:rgba(255,255,255,.65);transition:color var(--t),transform var(--t);
    display:inline-block;
  }
  .footer-col ul a:hover{color:#fff;transform:translateX(2px);}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.12);
    padding:22px 0 34px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
    font-size:13px;color:rgba(255,255,255,.5);
  }

  /* ---------- 响应式 ---------- */
  @media (min-width:1440px){
    :root{--sidebar:264px;}
    .container{padding:0 48px;}
  }
  @media (max-width:1279px){
    section{padding:72px 0;}
    .split{gap:36px;}
  }
  @media (max-width:1023px){
    .sidebar{transform:translateX(-100%);width:280px;box-shadow:0 0 40px rgba(16,34,46,.18);}
    .sidebar.open{transform:translateX(0);}
    .topbar{display:flex;}
    .page{margin-left:0;padding-top:60px;}
    .page-head{padding:32px 0 40px;}
    .page-head::before{display:none;}
    .page-head h1{font-size:32px;}
    .container{padding:0 24px;}
    .split{grid-template-columns:1fr;}
    .split figure{order:-1;}
    .cta-lite{flex-direction:column;align-items:flex-start;padding:32px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px;}
  }
  @media (max-width:900px){
    table.compare, .compare-wrap{display:none;}
    .compare-cards{display:flex;}
  }
  @media (max-width:767px){
    section{padding:56px 0;}
    .container{padding:0 20px;}
    .page-head h1{font-size:27px;}
    .page-head .lede{font-size:15.5px;}
    .section-head h2{font-size:22px;}
    .stat-band{grid-template-columns:1fr;gap:18px;padding:22px;}
    .case-grid{grid-template-columns:1fr;}
    .cta-lite .actions{width:100%;flex-direction:column;}
    .cta-lite .actions .btn{width:100%;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-col p{max-width:none;}
    .footer-bottom{flex-direction:column;gap:8px;}
  }
  @media (max-width:520px){
    .page-head h1{font-size:25px;}
    .btn{padding:0 18px;}
    .topbar-brand span{font-size:15px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  }

/* roulang page: category2 */
:root{
  --primary:#2A6F97;
  --primary-700:#1B5B7F;
  --primary-800:#124A69;
  --primary-400:#4E92B8;
  --primary-300:#8FBDD4;
  --primary-200:#D6E7F0;
  --primary-50:#EAF2F8;
  --accent:#C1543A;
  --bg:#F6F8FA;
  --card:#FFFFFF;
  --fill:#F2F6F9;
  --border:#E3E9EE;
  --divider:#EDF1F4;
  --text:#22333F;
  --text-2:#5A6B78;
  --text-3:#8B9AA6;
  --footer-bg:#10222E;
  --ok:#2E7D6B;
  --warn:#B98A2E;
  --err:#C0392B;
  --r-sm:8px;
  --r-card:16px;
  --r-lg:24px;
  --r-btn:10px;
  --sh-card:0 1px 2px rgba(16,34,46,.04), 0 8px 24px rgba(16,34,46,.06);
  --sh-hover:0 12px 32px rgba(16,34,46,.10);
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --sidebar-w:240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t),transform var(--t);}
img{max-width:100%;display:block;height:auto;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,select,textarea{font:inherit;color:inherit;}
::selection{background:rgba(42,111,151,.18);}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--fill);}
::-webkit-scrollbar-thumb{background:#C7D6E0;border-radius:999px;border:2px solid var(--fill);}
::-webkit-scrollbar-thumb:hover{background:var(--primary);}

/* ============ 布局 ============ */
.layout{min-height:100vh;}
.main{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column;}
.main > main{flex:1 1 auto;}
.container{width:100%;max-width:1120px;margin:0 auto;padding:0 40px;}

/* ============ 侧栏导航 ============ */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:var(--card);
  border-right:1px solid var(--border);
  border-left:3px solid var(--primary);
  z-index:60;
  display:flex;flex-direction:column;
  transition:transform 240ms cubic-bezier(.2,.7,.3,1);
}
.sidebar-inner{display:flex;flex-direction:column;height:100%;padding:22px 16px 18px;overflow-y:auto;}
.brand{display:flex;align-items:center;gap:10px;padding:4px 6px 0;}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:10px;
  background:var(--primary);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(42,111,151,.24);
}
.brand-mark svg{width:20px;height:20px;}
.brand-name{font-size:18px;font-weight:700;color:var(--primary);letter-spacing:-.01em;line-height:1.25;}
.side-divider{height:1px;background:var(--divider);margin:18px 6px;}
.nav-label{font-size:12px;letter-spacing:.08em;color:var(--text-3);padding:0 14px;margin-bottom:8px;}
.nav{display:flex;flex-direction:column;gap:4px;}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 14px;border-radius:var(--r-btn);
  font-size:14.5px;color:#38495A;
  transition:background-color var(--t),color var(--t),transform var(--t);
}
.nav-item svg{width:20px;height:20px;flex:0 0 20px;transition:transform var(--t);}
.nav-item:hover{background:var(--fill);color:var(--primary);}
.nav-item:hover svg{transform:translateX(2px);}
.nav-item.active{background:var(--primary-50);color:var(--primary-700);font-weight:600;}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:var(--primary);
}
.side-foot{margin-top:auto;padding-top:18px;}
.side-note{font-size:13px;line-height:1.6;color:var(--text-3);margin-top:10px;padding:0 4px;}
.overlay{
  position:fixed;inset:0;background:rgba(16,34,46,.45);
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);z-index:55;
}
.overlay.show{opacity:1;visibility:visible;}

/* ============ 顶部栏（移动端） ============ */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:12px;
  height:60px;padding:0 16px;
  background:var(--card);border-bottom:1px solid var(--border);
  transition:box-shadow var(--t);
}
.topbar.scrolled{box-shadow:0 2px 8px rgba(16,34,46,.06);}
.burger{
  width:44px;height:44px;flex:0 0 44px;border-radius:var(--r-btn);
  display:flex;align-items:center;justify-content:center;color:var(--text);
  border:1px solid var(--border);background:var(--card);
}
.burger:hover{background:var(--fill);color:var(--primary);}
.burger svg{width:20px;height:20px;}
.topbar-brand{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--primary);}
.topbar-mark{width:28px;height:28px;border-radius:8px;background:var(--primary);display:flex;align-items:center;justify-content:center;}
.topbar-mark svg{width:16px;height:16px;}
.topbar-cta{
  margin-left:auto;height:38px;padding:0 14px;border-radius:var(--r-btn);
  background:var(--primary);color:#fff;font-size:13.5px;font-weight:600;
  display:inline-flex;align-items:center;
}
.topbar-cta:hover{background:var(--primary-700);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:14.5px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;
  transition:transform var(--t),box-shadow var(--t),background-color var(--t),border-color var(--t),color var(--t);
}
.btn svg{width:18px;height:18px;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(42,111,151,.22);}
.btn-primary:hover{background:#2F7BA6;transform:translateY(-1px);box-shadow:0 10px 26px rgba(42,111,151,.28);}
.btn-primary:active{background:var(--primary-700);transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--text);border-color:#D6E0E7;}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-700);transform:translateY(-1px);}
.btn-outline{background:transparent;color:var(--primary-700);border-color:var(--primary-300);}
.btn-outline:hover{background:var(--primary-50);border-color:var(--primary);}
.btn-block{width:100%;}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:14.5px;}
.btn-text:hover{color:var(--primary-700);text-decoration:underline;}
.btn-text svg{width:16px;height:16px;transition:transform var(--t);}
.btn-text:hover svg{transform:translateX(3px);}
.btn:focus-visible,.nav-item:focus-visible,.burger:focus-visible,a:focus-visible,button:focus-visible{
  outline:2px solid var(--primary);outline-offset:2px;border-radius:var(--r-btn);
}

/* ============ 通用 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 12px;border-radius:999px;
  background:rgba(42,111,151,.10);color:var(--primary-700);
  font-size:13px;font-weight:600;line-height:1;
}
.badge-accent{background:rgba(193,84,58,.10);color:var(--accent);}
.section{padding:56px 0;}
.section-head{max-width:760px;margin-bottom:32px;}
.section-head h2{font-size:26px;font-weight:700;line-height:1.4;letter-spacing:-.01em;margin-bottom:12px;}
.section-head p{font-size:15.5px;color:var(--text-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--primary);
  letter-spacing:.04em;margin-bottom:12px;
}
.eyebrow::before{content:"";width:18px;height:3px;border-radius:2px;background:var(--accent);}

/* ============ 页头带 ============ */
.page-head{
  position:relative;
  padding:44px 0 52px;
  background-image:linear-gradient(180deg, rgba(246,248,250,.94) 0%, rgba(255,255,255,.97) 100%), url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--divider);
  overflow:hidden;
}
.page-head::after{
  content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle, rgba(42,111,151,.10) 0%, rgba(42,111,151,0) 70%);
}
.crumbs{position:relative;display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:14px;color:var(--text-3);margin-bottom:20px;}
.crumbs a{color:var(--primary);}
.crumbs a:hover{text-decoration:underline;}
.crumbs .sep{color:var(--text-3);}
.crumbs .cur{color:var(--text-3);}
.page-head h1{
  position:relative;
  font-size:38px;font-weight:700;line-height:1.35;letter-spacing:-.01em;
  max-width:880px;margin:16px 0 18px;
}
.page-head .lead{
  position:relative;max-width:760px;font-size:17px;color:var(--text-2);
}
.head-actions{position:relative;display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.head-meta{display:flex;flex-wrap:wrap;gap:22px;margin-top:26px;font-size:13px;color:var(--text-3);}
.head-meta span{display:inline-flex;align-items:center;gap:7px;}
.head-meta svg{width:16px;height:16px;color:var(--primary-400);}

/* ============ 数据条 ============ */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  background:var(--fill);border-radius:var(--r-card);padding:24px 28px;
  border:1px solid var(--border);
}
.stat strong{display:block;font-size:24px;font-weight:700;color:var(--primary-700);letter-spacing:-.01em;}
.stat span{display:block;font-size:13px;color:var(--text-3);margin-top:4px;}

/* ============ 时间线 ============ */
.timeline{position:relative;margin-top:8px;}
.timeline::before{
  content:"";position:absolute;left:23px;top:12px;bottom:12px;width:2px;
  background:linear-gradient(180deg,var(--primary-300),var(--primary-50));
  border-radius:2px;
}
.tl-item{position:relative;display:grid;grid-template-columns:48px 1fr;gap:24px;margin-bottom:32px;}
.tl-item:last-child{margin-bottom:0;}
.tl-node{
  width:48px;height:48px;border-radius:50%;
  background:#fff;border:2px solid var(--primary);color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;letter-spacing:.02em;
  box-shadow:0 0 0 6px var(--bg);
  z-index:1;
}
.tl-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-card);
  transition:transform var(--t),box-shadow var(--t);
}
.tl-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.tl-card h3{font-size:19px;font-weight:600;line-height:1.5;margin-bottom:10px;}
.tl-card p{font-size:15px;color:var(--text-2);margin-bottom:10px;}
.tl-card p:last-of-type{margin-bottom:0;}
.tl-body{display:flex;gap:18px;align-items:flex-start;}
.tl-text{flex:1 1 auto;min-width:0;}
.tl-thumb{
  width:120px;height:80px;flex:0 0 120px;object-fit:cover;border-radius:var(--r-sm);
  border:1px solid var(--border);
}
.tl-meta{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:14px;font-size:13px;color:var(--primary-700);
  background:var(--primary-50);border-radius:999px;padding:5px 12px;
}
.tl-meta svg{width:14px;height:14px;}

/* ============ 清单卡 ============ */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.check-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-card);transition:transform var(--t),box-shadow var(--t);
}
.check-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.check-card h3{font-size:17px;font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:10px;}
.check-card h3 svg{width:20px;height:20px;color:var(--primary);}
.check-list li{
  position:relative;padding-left:22px;font-size:14.5px;color:var(--text-2);
  line-height:1.8;margin-bottom:8px;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--primary-300);
}
.check-list li:last-child{margin-bottom:0;}

/* ============ 提示条 ============ */
.notice{
  display:flex;gap:14px;align-items:flex-start;
  border-radius:12px;padding:16px 18px;
  background:rgba(185,138,46,.10);
  border-left:3px solid var(--warn);
  font-size:14.5px;color:var(--text);
}
.notice + .notice{margin-top:12px;}
.notice.ok{background:rgba(46,125,107,.10);border-left-color:var(--ok);}
.notice.err{background:rgba(192,57,43,.10);border-left-color:var(--err);}
.notice svg{width:20px;height:20px;flex:0 0 20px;margin-top:3px;color:var(--warn);}
.notice.ok svg{color:var(--ok);}
.notice.err svg{color:var(--err);}
.notice strong{display:block;font-weight:600;margin-bottom:2px;}
.notice p{font-size:14px;color:var(--text-2);}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:14px;
  margin-bottom:12px;overflow:hidden;transition:border-color var(--t),box-shadow var(--t),background-color var(--t);
}
.faq-item:last-child{margin-bottom:0;}
.faq-item:hover{border-color:var(--primary-200);}
.faq-item.open{border-left:3px solid var(--primary);background:#F7FAFC;box-shadow:var(--sh-card);}
.faq-q{
  width:100%;min-height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;text-align:left;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.6;
}
.faq-q .sign{
  flex:0 0 24px;width:24px;height:24px;position:relative;color:var(--primary);
}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
  transition:transform var(--t),opacity var(--t);
}
.faq-q .sign::before{left:4px;right:4px;top:11px;height:2px;}
.faq-q .sign::after{top:4px;bottom:4px;left:11px;width:2px;}
.faq-item.open .sign::after{transform:scaleY(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height 220ms cubic-bezier(.2,.7,.3,1),opacity 220ms;opacity:0;}
.faq-item.open .faq-a{opacity:1;}
.faq-a-inner{padding:0 20px 20px;font-size:15px;color:var(--text-2);line-height:1.85;}

/* ============ 分类入口卡 ============ */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.entry-card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-card);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--primary-200);}
.entry-card h3{font-size:17px;font-weight:600;margin-bottom:8px;}
.entry-card p{font-size:14px;color:var(--text-2);margin-bottom:16px;flex:1 1 auto;}
.entry-card .entry-ico{
  width:40px;height:40px;border-radius:12px;background:var(--primary-50);color:var(--primary-700);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.entry-card .entry-ico svg{width:20px;height:20px;}

/* ============ 页尾 CTA ============ */
.cta-band{
  background:var(--fill);border:1px solid var(--border);border-radius:var(--r-lg);
  padding:36px;display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band h2{font-size:24px;font-weight:700;line-height:1.4;margin-bottom:10px;}
.cta-band p{font-size:15px;color:var(--text-2);max-width:620px;}
.cta-band .cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex:0 0 auto;}

/* ============ 页脚 ============ */
.footer{background:var(--footer-bg);color:#fff;margin-top:64px;padding:56px 0 0;}
.footer .container{max-width:1120px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px;background:var(--primary);display:flex;align-items:center;justify-content:center;}
.footer-brand .brand-mark svg{width:18px;height:18px;}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:300px;}
.footer-col h4{font-size:14px;font-weight:600;color:rgba(255,255,255,.9);margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col li a{font-size:14px;color:rgba(255,255,255,.65);display:inline-block;}
.footer-col li a:hover{color:#fff;transform:translateX(2px);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (min-width:1440px){
  :root{--sidebar-w:264px;}
  .container{padding:0 48px;}
}
@media (max-width:1023px){
  .sidebar{transform:translateX(-100%);width:280px;border-left-width:3px;box-shadow:0 20px 60px rgba(16,34,46,.24);}
  .sidebar.open{transform:translateX(0);}
  .main{margin-left:0;}
  .page-head{padding:32px 0 40px;}
  .page-head h1{font-size:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;}
}
@media (min-width:1024px){
  .topbar{display:none;}
}
@media (max-width:767px){
  body{font-size:15.5px;}
  .container{padding:0 20px;}
  .section{padding:44px 0;}
  .page-head{padding:24px 0 34px;}
  .page-head h1{font-size:26px;margin:14px 0 14px;}
  .page-head .lead{font-size:15.5px;}
  .head-actions{flex-direction:column;align-items:stretch;gap:10px;}
  .head-actions .btn{width:100%;}
  .section-head h2{font-size:22px;}
  .stat-strip{grid-template-columns:1fr 1fr;padding:20px;gap:18px;}
  .stat strong{font-size:21px;}
  .timeline::before{left:15px;}
  .tl-item{grid-template-columns:32px 1fr;gap:16px;margin-bottom:24px;}
  .tl-node{width:32px;height:32px;font-size:13px;border-width:2px;box-shadow:0 0 0 5px var(--bg);}
  .tl-card{padding:18px;}
  .tl-body{flex-direction:column;}
  .tl-thumb{width:100%;height:150px;flex:1 1 auto;}
  .check-grid{grid-template-columns:1fr;}
  .entry-grid{grid-template-columns:1fr;}
  .cta-band{padding:22px;border-radius:var(--r-card);}
  .cta-band .cta-actions{width:100%;}
  .cta-band .cta-actions .btn{width:100%;}
  .faq-q{font-size:15px;padding:14px 16px;}
  .faq-a-inner{padding:0 16px 18px;}
  .footer{padding:44px 0 0;margin-top:48px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:519px){
  .footer-grid{grid-template-columns:1fr;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category4 */
:root{
  --primary:#2A6F97;
  --primary-700:#1B5B7F;
  --primary-800:#124A69;
  --primary-400:#4E92B8;
  --primary-300:#8FBDD4;
  --primary-200:#D6E7F0;
  --primary-50:#EAF2F8;
  --accent:#C1543A;
  --accent-soft:rgba(193,84,58,.10);
  --bg:#F6F8FA;
  --card:#FFFFFF;
  --fill:#F2F6F9;
  --border:#E3E9EE;
  --line:#EDF1F4;
  --text:#22333F;
  --text-2:#5A6B78;
  --text-3:#8B9AA6;
  --footer-bg:#10222E;
  --success:#2E7D6B;
  --warn:#B98A2E;
  --error:#C0392B;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:24px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(16,34,46,.04), 0 8px 24px rgba(16,34,46,.06);
  --sh-2:0 12px 32px rgba(16,34,46,.10);
  --sh-3:0 16px 40px rgba(16,34,46,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:180ms;
  --sidebar-w:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color var(--t) var(--ease)}
a:hover{color:var(--primary-700)}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.4;letter-spacing:-.01em}
p{margin:0 0 1.5em}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit}
input,select,textarea{font:inherit}
::selection{background:rgba(42,111,151,.18)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--fill)}
::-webkit-scrollbar-thumb{background:#C7D6E0;border-radius:999px;border:2px solid var(--fill)}
::-webkit-scrollbar-thumb:hover{background:var(--primary)}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

/* 布局骨架 */
.content{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 40px;
}

/* 左侧导航 */
.sidebar{
  position:fixed;
  left:0;top:0;bottom:0;
  width:var(--sidebar-w);
  background:var(--card);
  border-right:1px solid var(--border);
  display:flex;
  flex-direction:column;
  padding:22px 16px 20px;
  z-index:70;
  overflow-y:auto;
}
.sidebar::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:var(--primary);
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:0 8px 18px;
  color:var(--primary-700);
}
.brand:hover{color:var(--primary-700)}
.brand-mark{
  width:36px;height:36px;
  flex:0 0 36px;
  border-radius:10px;
  background:var(--primary);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(42,111,151,.28);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{
  font-size:18px;
  font-weight:700;
  letter-spacing:-.01em;
}
.nav-sep{height:1px;background:var(--line);margin:0 8px 16px}
.nav-label{
  font-size:12px;
  letter-spacing:.12em;
  color:var(--text-3);
  padding:0 14px 10px;
}
.nav{
  display:flex;
  flex-direction:column;
  gap:4px;
  flex:1 1 auto;
}
.nav-item{
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  padding:0 14px;
  border-radius:10px;
  font-size:14.5px;
  color:#38495A;
  position:relative;
  transition:background var(--t) var(--ease),color var(--t) var(--ease);
}
.nav-item svg{width:20px;height:20px;flex:0 0 20px;transition:transform var(--t) var(--ease)}
.nav-item:hover{background:var(--fill);color:var(--primary)}
.nav-item:hover svg{transform:translateX(2px)}
.nav-item.active{
  background:var(--primary-50);
  color:var(--primary-700);
  font-weight:600;
}
.nav-item.active::before{
  content:"";
  position:absolute;
  left:0;top:10px;bottom:10px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--primary);
}
.sidebar-foot{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.sidebar-note{
  margin:10px 0 0;
  font-size:13px;
  color:var(--text-3);
  line-height:1.6;
  text-align:center;
}

/* 移动端顶栏 */
.topbar{
  display:none;
  position:sticky;
  top:0;
  z-index:60;
  height:60px;
  background:var(--card);
  border-bottom:1px solid var(--border);
  align-items:center;
  gap:12px;
  padding:0 16px;
}
.topbar.shadow{box-shadow:0 2px 8px rgba(16,34,46,.06)}
.hamburger{
  width:44px;height:44px;
  border:1px solid var(--border);
  background:#fff;
  border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  transition:border-color var(--t) var(--ease),background var(--t) var(--ease);
}
.hamburger:hover{border-color:var(--primary);background:var(--primary-50)}
.hamburger svg{width:20px;height:20px;stroke:var(--primary-700)}
.topbar-brand{
  display:flex;align-items:center;gap:8px;
  font-size:15.5px;font-weight:700;color:var(--primary-700);
  flex:1 1 auto;min-width:0;
}
.topbar-brand .brand-mark{width:30px;height:30px;flex:0 0 30px;border-radius:9px}
.topbar-brand .brand-mark svg{width:18px;height:18px}
.topbar-brand span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-cta{
  height:38px;
  padding:0 14px;
  border-radius:10px;
  background:var(--primary);
  color:#fff;
  font-size:13.5px;
  font-weight:600;
  display:inline-flex;align-items:center;
  white-space:nowrap;
}
.topbar-cta:hover{background:var(--primary-700);color:#fff}
.scrim{
  display:none;
  position:fixed;
  inset:0;
  background:rgba(16,34,46,.45);
  z-index:65;
  opacity:0;
  transition:opacity 240ms var(--ease);
}
.scrim.show{display:block;opacity:1}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-btn);
  font-size:14.5px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:transform var(--t) var(--ease),background var(--t) var(--ease),border-color var(--t) var(--ease),box-shadow var(--t) var(--ease),color var(--t) var(--ease);
}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(42,111,151,.22)}
.btn-primary:hover{background:#2f7ba5;color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:none;background:var(--primary-700)}
.btn-ghost{background:#fff;color:var(--text);border-color:#D6E0E7}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-700);transform:translateY(-1px)}
.btn-ghost:active{transform:none;background:var(--primary-50)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

/* 徽章与标签 */
.badge{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:rgba(42,111,151,.08);
  color:var(--primary-700);
  font-size:13px;
  font-weight:600;
  line-height:1;
}
.badge-accent{background:var(--accent-soft);color:var(--accent)}

/* 页头带 */
.page-head{
  position:relative;
  overflow:hidden;
  background:linear-gradient(180deg,var(--bg) 0%,#FFFFFF 100%);
  border-bottom:1px solid var(--line);
}
.page-head::after{
  content:"";
  position:absolute;
  right:-120px;top:-140px;
  width:420px;height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(42,111,151,.10) 0%,rgba(42,111,151,0) 70%);
  pointer-events:none;
}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--text-3);
  padding:28px 0 0;
}
.crumb a{color:var(--primary)}
.crumb a:hover{text-decoration:underline}
.crumb span{color:var(--text-3)}
.page-head-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
  padding:26px 0 64px;
  position:relative;
  z-index:1;
}
.page-head h1{
  font-size:38px;
  line-height:1.35;
  margin:16px 0 14px;
  max-width:620px;
}
.lead{
  font-size:16.5px;
  color:var(--text-2);
  max-width:600px;
  margin:0 0 26px;
}
.head-actions{display:flex;flex-wrap:wrap;gap:12px}
.head-visual{
  position:relative;
  border-radius:var(--r-xl);
  overflow:hidden;
  box-shadow:var(--sh-1);
  aspect-ratio:4/3;
  background:var(--fill);
}
.head-visual img{width:100%;height:100%;object-fit:cover}
.head-visual figcaption{
  position:absolute;
  left:16px;bottom:16px;
  background:rgba(255,255,255,.92);
  color:var(--primary-700);
  font-size:13px;
  font-weight:600;
  padding:8px 14px;
  border-radius:999px;
  backdrop-filter:blur(2px);
}

/* 板块 */
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{max-width:760px;margin-bottom:36px}
.section-head h2{font-size:27px;margin-bottom:14px}
.section-head p{color:var(--text-2);margin:0}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--primary);
  letter-spacing:.06em;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--primary);border-radius:2px}

/* 问答速览 */
.quick{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--r-xl);
  box-shadow:var(--sh-1);
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:40px;
  padding:40px;
}
.quick h2{font-size:24px;margin-bottom:14px}
.quick p{color:var(--text-2);font-size:15.5px;margin-bottom:22px}
.stat-row{display:flex;flex-wrap:wrap;gap:28px}
.stat b{display:block;font-size:26px;font-weight:700;color:var(--primary);line-height:1.2}
.stat span{font-size:13px;color:var(--text-3)}
.quick-list{display:flex;flex-direction:column;gap:14px}
.quick-item{
  display:flex;
  align-items:flex-start;
  gap:14px;
  padding:18px 20px;
  border:1px solid var(--border);
  border-radius:var(--r-md);
  background:#fff;
  transition:border-color var(--t) var(--ease),box-shadow var(--t) var(--ease),transform var(--t) var(--ease);
}
.quick-item:hover{border-color:var(--primary-300);box-shadow:var(--sh-1);transform:translateY(-2px)}
.quick-item .qi-icon{
  width:36px;height:36px;flex:0 0 36px;
  border-radius:10px;
  background:var(--primary-50);
  display:flex;align-items:center;justify-content:center;
}
.quick-item .qi-icon svg{width:20px;height:20px;stroke:var(--primary)}
.quick-item h3{font-size:16.5px;font-weight:600;margin-bottom:4px}
.quick-item p{margin:0;font-size:14px;color:var(--text-2);line-height:1.75}
.quick-item .qi-arrow{margin-left:auto;color:var(--primary);font-size:14px;font-weight:600;white-space:nowrap;align-self:center}

/* 手风琴 */
.faq-group-title{
  font-size:24px;
  padding-left:14px;
  border-left:4px solid var(--primary);
  margin-bottom:22px;
  line-height:1.3;
}
.faq-group{margin-bottom:56px}
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:960px}
.faq-item{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  overflow:hidden;
  transition:box-shadow var(--t) var(--ease),border-color var(--t) var(--ease),background var(--t) var(--ease);
}
.faq-item:hover{border-color:var(--primary-300)}
.faq-item.open{
  background:#F7FAFC;
  border-color:var(--primary-200);
  box-shadow:inset 3px 0 0 var(--primary),var(--sh-1);
}
.faq-q{
  width:100%;
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:14px 22px;
  background:none;
  border:0;
  text-align:left;
  font-size:16px;
  font-weight:600;
  cursor:pointer;
  color:var(--text);
}
.faq-icon{
  flex:0 0 26px;
  width:26px;height:26px;
  border-radius:999px;
  background:var(--primary-50);
  color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:17px;
  font-weight:700;
  line-height:1;
  transition:background var(--t) var(--ease),color var(--t) var(--ease);
}
.faq-item.open .faq-icon{background:var(--primary);color:#fff}
.faq-a{
  max-height:0;
  opacity:0;
  overflow:hidden;
  transition:max-height 220ms var(--ease),opacity 220ms var(--ease);
}
.faq-item.open .faq-a{opacity:1}
.faq-a-inner{
  padding:0 22px 22px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}
.faq-a-inner ul{margin:12px 0 0;display:flex;flex-direction:column;gap:8px}
.faq-a-inner li{padding-left:18px;position:relative}
.faq-a-inner li::before{
  content:"";
  position:absolute;left:0;top:.72em;
  width:6px;height:6px;border-radius:50%;
  background:var(--primary-300);
}

/* 提交前准备 */
.prep{
  display:grid;
  grid-template-columns:6fr 6fr;
  gap:48px;
  align-items:center;
}
.prep-list{display:flex;flex-direction:column;gap:16px;margin-top:8px}
.prep-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--r-md);
  padding:16px 18px;
  box-shadow:var(--sh-1);
  transition:transform var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.prep-list li:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.prep-list .tick{
  width:22px;height:22px;flex:0 0 22px;
  margin-top:3px;
  border-radius:50%;
  background:var(--primary-50);
  display:flex;align-items:center;justify-content:center;
}
.prep-list .tick svg{width:14px;height:14px;stroke:var(--primary)}
.prep-list h3{font-size:16px;font-weight:600;margin-bottom:2px}
.prep-list p{margin:0;font-size:14px;color:var(--text-2);line-height:1.75}
.prep-media{
  border-radius:var(--r-xl);
  overflow:hidden;
  box-shadow:var(--sh-1);
  aspect-ratio:4/3;
}
.prep-media img{width:100%;height:100%;object-fit:cover}
.prep-note{
  margin-top:20px;
  background:var(--fill);
  border-left:3px solid var(--primary);
  border-radius:0 var(--r-md) var(--r-md) 0;
  padding:14px 18px;
  font-size:14px;
  color:var(--text-2);
}

/* 联系卡 */
.contact-card{
  background:var(--fill);
  border:1px solid var(--border);
  border-radius:20px;
  padding:38px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
}
.contact-card h2{font-size:23px;margin-bottom:10px}
.contact-card p{margin:0;color:var(--text-2);font-size:15.5px;max-width:640px}
.contact-card .cc-actions{display:flex;gap:12px;flex-wrap:wrap}

/* 浅色 CTA */
.cta-lite{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--r-xl);
  box-shadow:var(--sh-1);
  padding:40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  position:relative;
  overflow:hidden;
}
.cta-lite::after{
  content:"";
  position:absolute;
  right:-90px;bottom:-120px;
  width:300px;height:300px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(193,84,58,.10) 0%,rgba(193,84,58,0) 70%);
  pointer-events:none;
}
.cta-lite h2{font-size:24px;margin-bottom:10px}
.cta-lite p{margin:0;color:var(--text-2);font-size:15.5px;max-width:660px}
.cta-lite .cc-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}

/* 页脚 */
.footer{
  margin-top:auto;
  background:var(--footer-bg);
  color:rgba(255,255,255,.65);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:2.2fr 1.2fr 1.2fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:17px;
  font-weight:700;
  margin-bottom:14px;
}
.footer-brand .brand-mark{background:var(--primary);box-shadow:none}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);margin:0;max-width:320px}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:rgba(255,255,255,.9);
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{
  font-size:14px;
  color:rgba(255,255,255,.65);
  transition:color var(--t) var(--ease),transform var(--t) var(--ease);
  display:inline-block;
}
.footer-col ul a:hover{color:#fff;transform:translateX(2px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 24px;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* 响应式 */
@media (min-width:1440px){
  :root{--sidebar-w:264px}
  .container{padding:0 48px}
}
@media (max-width:1279px){
  .page-head-grid{gap:36px}
  .quick{grid-template-columns:1fr;gap:28px;padding:32px}
  .prep{grid-template-columns:1fr;gap:32px}
}
@media (max-width:1023px){
  .content{margin-left:0}
  .sidebar{
    transform:translateX(-100%);
    transition:transform 240ms var(--ease);
    width:280px;
    box-shadow:0 0 40px rgba(16,34,46,.18);
  }
  .sidebar.open{transform:translateX(0)}
  .topbar{display:flex}
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .page-head-grid{grid-template-columns:1fr;padding:22px 0 48px}
  .page-head h1{font-size:32px}
  .head-visual{aspect-ratio:16/9;order:-1}
  .contact-card,.cta-lite{flex-direction:column;align-items:flex-start;gap:24px;padding:30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  body{font-size:16px}
  .page-head h1{font-size:28px}
  .page-head-grid{gap:28px}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .section-head h2{font-size:23px}
  .quick{padding:24px}
  .quick h2{font-size:21px}
  .stat-row{gap:22px}
  .stat b{font-size:22px}
  .quick-item{padding:16px}
  .quick-item .qi-arrow{display:none}
  .faq-group-title{font-size:21px}
  .faq-q{font-size:15.5px;padding:14px 18px;gap:12px}
  .faq-a-inner{padding:0 18px 18px}
  .faq-list{max-width:none}
  .btn{width:100%}
  .head-actions .btn,.cc-actions .btn,.cta-lite .cc-actions .btn{width:100%}
  .head-actions,.cc-actions,.cta-lite .cc-actions{width:100%}
  .cta-lite{padding:26px 22px}
  .cta-lite h2{font-size:21px}
  .contact-card h2{font-size:20px}
  .footer{padding-top:48px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;padding-bottom:32px}
  .footer-col p{max-width:none}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .page-head h1{font-size:26px}
  .crumb{padding-top:20px;font-size:13px}
  .brand-text{font-size:16.5px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .stat-row{gap:18px}
  .prep-list li{padding:14px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}