/* roulang page: index */
:root{
  --bg-canvas:#F4F8FC;
  --surface:#FFFFFF;
  --surface-muted:#ECF2F8;
  --primary:#2A6EA6;
  --primary-soft:#E7F0F8;
  --accent:#D18A2A;
  --text-main:#243949;
  --text-secondary:#5C7285;
  --text-tertiary:#93A7B8;
  --border:#DCE6EF;
  --border-light:#EAF1F7;
  --success:#368B6B;
  --warning:#B47D2E;
  --error:#BC4A4A;
  --radius:12px;
  --radius-sm:8px;
  --shadow-regular:0 1px 2px rgba(33,61,84,0.05),0 6px 18px rgba(33,61,84,0.06);
  --shadow-hover:0 2px 4px rgba(33,61,84,0.06),0 16px 32px rgba(33,61,84,0.10);
  --font-stack:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-stack);
  background:var(--bg-canvas);
  color:var(--text-main);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button{font-family:inherit;border:none;background:none;cursor:pointer;color:inherit}
img{display:block;max-width:100%}
p{line-height:1.8}
:focus-visible{outline:3px solid rgba(42,110,166,.32);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1160px;margin:0 auto;padding-left:40px;padding-right:40px}
.section{padding-top:72px;padding-bottom:72px}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--primary-soft);color:var(--primary);
  font-size:13px;font-weight:600;letter-spacing:.02em;
  padding:7px 14px;border-radius:999px;margin-bottom:16px;
}
.section-kicker::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}
.section-title{
  font-size:32px;font-weight:700;line-height:1.35;
  letter-spacing:-0.01em;color:var(--text-main);margin-bottom:14px;
}
.section-sub{font-size:16px;color:var(--text-secondary);max-width:640px;margin-bottom:36px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;flex-wrap:wrap}
.section-head .section-sub{margin-bottom:0}
.eyebrow{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--primary);text-transform:uppercase;margin-bottom:10px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;font-size:15px;font-weight:600;
  border-radius:var(--radius-sm);transition:all .25s ease;
  border:1px solid transparent;
}
.btn-primary{
  background:var(--primary);color:#fff;
  box-shadow:0 6px 16px rgba(42,110,166,.18);
}
.btn-primary:hover{
  background:#1e6090;transform:translateY(-1px);
  box-shadow:0 10px 24px rgba(42,110,166,.24);
}
.btn-primary:active{transform:translateY(0)}
.btn-secondary{
  background:var(--surface);color:var(--primary);
  border-color:var(--border);
}
.btn-secondary:hover{
  border-color:var(--primary);background:var(--primary-soft);
  box-shadow:0 6px 18px rgba(42,110,166,.08);
}
.btn-secondary:active{box-shadow:none;transform:translateY(0)}
.btn-accent{background:var(--text-main);color:#fff}
.btn-accent:hover{background:#162b3a}

.text-link{
  display:inline-flex;align-items:center;gap:6px;font-weight:600;
  color:var(--primary);font-size:15px;
}
.text-link:hover{color:#1e6090}
.text-link:hover span{transform:translateX(4px)}
.text-link span{transition:transform .2s ease}

.badge-tag{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--primary-soft);color:var(--primary);
  font-size:13px;font-weight:600;padding:3px 12px;
  border-radius:999px;white-space:nowrap;
}
.badge-solid{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--surface);border:1px solid var(--border);
  color:var(--text-secondary);font-size:13px;padding:6px 14px;border-radius:999px;
}
.badge-solid strong{color:var(--primary)}

.card{
  background:var(--surface);border-radius:var(--radius);
  box-shadow:var(--shadow-regular);transition:all .25s ease;
}
.card:hover{
  box-shadow:var(--shadow-hover);
  transform:translateY(-3px);
}

/* ===== App Shell ===== */
.app-sidebar{
  position:fixed;inset:0 auto 0 0;width:256px;z-index:100;
  background:var(--surface);border-right:1px solid var(--border);
  display:flex;flex-direction:column;
  padding:28px 20px 24px;overflow-y:auto;
  transition:transform .3s ease,box-shadow .3s ease;
}
.brand-wrap{
  display:flex;align-items:center;gap:10px;
  margin-bottom:32px;padding:0 10px;
}
.brand-logo-square{
  width:36px;height:36px;border-radius:10px;flex:none;
  background:linear-gradient(145deg,var(--primary),#5496c8);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:18px;font-weight:700;
  box-shadow:0 6px 14px rgba(42,110,166,.2);
}
.brand-text{font-size:21px;font-weight:700;color:var(--text-main);letter-spacing:.01em}
.drawer-close{display:none}
.nav-section-label{
  font-size:11px;font-weight:700;letter-spacing:.08em;
  color:var(--text-tertiary);text-transform:uppercase;
  margin:22px 12px 8px;
}
.nav-items{display:flex;flex-direction:column;gap:2px}
.nav-item{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 14px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--text-secondary);
  transition:all .18s ease;
}
.nav-item:hover{background:var(--primary-soft);color:var(--primary)}
.nav-item:focus-visible{outline:3px solid rgba(42,110,166,.3);outline-offset:1px}
.nav-item.active{
  background:transparent;color:var(--primary);font-weight:700;
}
.nav-item.active::before{
  content:"";position:absolute;left:-20px;top:9px;bottom:9px;width:3px;
  background:var(--primary);border-radius:0 3px 3px 0;
}
.nav-item .nav-icon{
  font-size:15px;width:20px;text-align:center;
  opacity:.85;
}
.sidebar-bottom{
  margin-top:auto;padding:18px 12px 0;border-top:1px solid var(--border-light);
  font-size:12px;color:var(--text-tertiary);line-height:1.7;
}
.sidebar-bottom-dot{color:var(--primary)}

.app-main{
  margin-left:256px;min-height:100vh;
  background:var(--bg-canvas);
  display:flex;flex-direction:column;
}
.main-content{flex:1}

/* mobile topbar */
.mobile-topbar{
  display:none;position:sticky;top:0;left:0;right:0;z-index:99;
  height:64px;align-items:center;justify-content:space-between;
  padding:0 20px;background:var(--surface);
  border-bottom:1px solid var(--border);
}
.mobile-brand-wrap{display:flex;align-items:center;gap:8px}
.hamburger-btn{
  width:42px;height:42px;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:5px;border-radius:8px;
}
.hamburger-btn:hover,.hamburger-btn:focus-visible{background:var(--primary-soft)}
.hamburger-btn span{width:22px;height:2px;background:var(--text-main);border-radius:3px}
.drawer-overlay{
  display:none;position:fixed;inset:0;z-index:98;
  background:rgba(23,42,62,.36);backdrop-filter:blur(2px);
}
@media(max-width:1099px){
  .app-sidebar{
    width:280px;transform:translateX(-100%);
    padding-top:70px;
  }
  body.sidebar-open .app-sidebar{transform:none;box-shadow:0 0 40px rgba(13,34,52,.18)}
  .mobile-topbar{display:flex}
  body.sidebar-open .drawer-overlay{display:block}
  .drawer-close{
    position:absolute;top:12px;right:14px;display:flex;
    width:38px;height:38px;align-items:center;justify-content:center;
    font-size:24px;color:var(--text-secondary);border-radius:8px;
  }
  .drawer-close:hover{background:var(--primary-soft);color:var(--primary)}
  .app-main{margin-left:0}
  .container{padding-left:20px;padding-right:20px}
}

/* ===== Hero ===== */
.hero-section{
  position:relative;padding:64px 0 80px;
  background:radial-gradient(ellipse at 8% 12%,rgba(104,167,216,.13),transparent 45%),linear-gradient(180deg,#f7fbfd,var(--bg-canvas));
  overflow:hidden;
}
.hero-wrap{
  display:grid;grid-template-columns:1.04fr .96fr;gap:56px;align-items:center;
  max-width:1160px;margin:0 auto;padding:0 40px;
}
.hero-content{max-width:640px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--surface);border:1px solid var(--border);
  padding:7px 16px 7px 9px;border-radius:999px;
  box-shadow:var(--shadow-regular);margin-bottom:26px;
}
.hero-eyebrow-avatar{
  width:26px;height:26px;border-radius:50%;background:var(--primary-soft);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--primary);font-size:12px;font-weight:700;
}
.hero-eyebrow-text{font-size:14px;color:var(--text-secondary);font-weight:500}
.hero-title{
  font-size:42px;line-height:1.32;font-weight:700;color:var(--text-main);
  letter-spacing:-.015em;margin-bottom:18px;
}
.hero-title mark{
  background:transparent;
  background-image:linear-gradient(to top,var(--primary-soft) 18%,transparent 18%);
  color:var(--text-main);font-weight:700;
}
.hero-desc{
  font-size:17px;color:var(--text-secondary);line-height:1.9;
  max-width:560px;margin-bottom:34px;
}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:14px;margin-bottom:46px}
.hero-proof{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  border-top:1px solid var(--border);padding-top:28px;
  max-width:560px;
}
.hero-proof-text{
  font-size:12px;width:100%;color:var(--text-tertiary);
  margin-bottom:6px;letter-spacing:.04em;
}

.hero-visual-card{
  border-radius:20px;background:var(--surface);
  border:1px solid rgba(220,230,239,.7);
  padding:10px;box-shadow:var(--shadow-regular);
  transition:transform .3s ease,box-shadow .3s ease;
}
.hero-visual-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.hero-visual-inner{
  position:relative;border-radius:14px;overflow:hidden;
  height:390px;background:var(--surface-muted);
}
.hero-visual-inner img{
  width:100%;height:100%;object-fit:cover;
}
.hero-visual-caption{
  padding:18px 18px 16px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.hero-visual-title{font-size:16px;font-weight:700;color:var(--text-main)}
.hero-visual-tag{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--primary-soft);color:var(--primary);
  padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700;
}
.hero-float-card{
  position:absolute;right:20px;bottom:-20px;background:var(--surface);
  border-radius:14px;padding:16px 18px;box-shadow:var(--shadow-hover);
  border:1px solid var(--border-light);max-width:220px;
}
.hero-float-title{
  display:flex;align-items:center;gap:8px;
  font-size:14px;font-weight:700;margin-bottom:2px;
}
.hero-float-title span{color:var(--accent)}
.hero-float-desc{font-size:12px;color:var(--text-tertiary)}

@media(max-width:1099px){
  .hero-section{padding:48px 0 68px}
  .hero-wrap{grid-template-columns:1fr;gap:44px;padding:0 20px}
  .hero-title{font-size:36px;line-height:1.35}
  .hero-visual-inner{height:340px}
  .container{padding-left:20px;padding-right:20px}
}

/* ===== Steps / 流程区块 ===== */
.steps-bg{background:var(--surface)}
.steps-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin-top:28px;
}
.step-card{
  position:relative;background:var(--bg-canvas);
  border:1px solid var(--border);border-radius:16px;
  padding:34px 26px 30px;overflow:hidden;
  transition:all .25s ease;
}
.step-card:hover{
  border-color:var(--primary);background:var(--primary-soft);
  transform:translateY(-3px);box-shadow:var(--shadow-hover);
}
.step-number{
  font-size:60px;font-weight:800;line-height:1;
  color:var(--primary-soft);position:relative;z-index:1;
  letter-spacing:-2px;
}
.step-card:hover .step-number{color:#d4e6f5}
.step-icon{
  width:28px;height:28px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary);color:#fff;font-size:14px;
  position:absolute;right:24px;top:28px;
}
.step-title{
  font-size:20px;font-weight:700;margin:18px 0 8px;color:var(--text-main);
}
.step-desc{font-size:14px;color:var(--text-secondary);line-height:1.8;padding-right:6px}

@media(max-width:920px){
  .steps-grid{grid-template-columns:1fr;gap:18px}
}
@media(max-width:520px){
  .section-title{font-size:28px}
  .hero-title{font-size:30px}
  .hero-actions .btn{padding:0 20px;height:46px}
}

/* ===== Case 案例 ===== */
.case-section{background:var(--bg-canvas)}
.case-showcase{
  display:grid;grid-template-columns:1.65fr 1fr;gap:22px;
  margin-top:20px;
}
.case-feature{
  background:var(--surface);border-radius:18px;overflow:hidden;
  box-shadow:var(--shadow-regular);
  transition:transform .25s ease,box-shadow .25s ease;
}
.case-feature:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.case-feature-cover{
  position:relative;height:300px;overflow:hidden;
  background:var(--surface-muted);
}
.case-feature-cover img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.case-feature:hover .case-feature-cover img{transform:scale(1.03)}
.case-cover-tag{
  position:absolute;left:18px;top:16px;z-index:2;
}
.case-feature-body{padding:30px 32px 32px}
.case-badge-row{
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.case-badge{background:var(--primary-soft);color:var(--primary);font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px}
.case-badge-light{background:var(--surface-muted);color:var(--text-secondary)}
.case-feature-title{font-size:23px;font-weight:700;line-height:1.5;color:var(--text-main);margin-bottom:12px}
.case-feature-desc{font-size:15px;color:var(--text-secondary);line-height:1.85;margin-bottom:20px}
.case-readmore{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:14px}
.case-readmore span{transition:transform .2s ease}
.case-readmore:hover span{transform:translateX(4px)}

.case-aside{
  display:grid;grid-row-gap:22px;
}
.compact-card{
  display:grid;grid-template-columns:162px 1fr;gap:0;
  background:var(--surface);border-radius:16px;overflow:hidden;
  box-shadow:var(--shadow-regular);transition:all .25s ease;
}
.compact-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.compact-card-img{position:relative;min-height:150px;background:var(--surface-muted);overflow:hidden}
.compact-card-img img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.compact-card-body{padding:22px 22px 20px;display:flex;flex-direction:column;justify-content:center}
.compact-card-title{font-size:17px;line-height:1.55;font-weight:700;color:var(--text-main);margin-bottom:8px}
.compact-card-desc{font-size:13px;color:var(--text-secondary);line-height:1.7;margin-bottom:12px}
.compact-card-link{font-size:13px;color:var(--primary);font-weight:600;margin-top:auto}
.compact-card-link:hover{color:#1e6090}

@media(max-width:920px){
  .case-showcase{grid-template-columns:1fr}
  .case-aside{grid-template-columns:1fr 1fr;grid-row-gap:22px}
}
@media(max-width:640px){
  .compact-card{grid-template-columns:110px 1fr}
  .case-aside{grid-template-columns:1fr}
  .compact-card-img{min-height:120px}
  .case-feature-cover{height:220px}
  .case-feature-body{padding:24px}
}

/* ===== 最新信息 CMS ===== */
.info-section{background:var(--surface)}
.info-panel{
  background:var(--bg-canvas);
  border:1px solid var(--border-light);
  border-radius:18px;
  padding:6px 8px;
}
.info-list{display:flex;flex-direction:column}
.info-item{
  display:grid;grid-template-columns:136px minmax(0,1fr) 130px auto;
  gap:18px;align-items:center;
  padding:22px 22px;margin:7px 2px;
  background:var(--surface);border-radius:14px;
  border:1px solid transparent;
  transition:all .22s ease;
}
.info-item:hover{
  box-shadow:var(--shadow-regular);
  border-color:var(--border);
  background:#fff;
}
.info-tagcol .badge-tag{font-size:12px;letter-spacing:.02em}
.info-title{font-size:17px;font-weight:700;line-height:1.5;color:var(--text-main);margin-bottom:5px}
.info-title a:hover{color:var(--primary)}
.info-desc{
  font-size:14px;color:var(--text-secondary);
  line-height:1.7;max-width:620px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.info-date{font-size:13px;color:var(--text-tertiary);display:flex;align-items:center;gap:6px}
.info-date::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent)}
.info-go{
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;color:var(--primary);font-weight:600;
  border:1px solid var(--border);border-radius:8px;
  padding:10px 16px;transition:all .2s ease;
}
.info-go:hover{background:var(--primary-soft);border-color:var(--primary);transform:translateX(2px)}
.info-row-meta{display:grid;grid-template-columns:auto auto;gap:16px;justify-content:flex-start;align-items:center}

.info-empty{
  border:2px dashed var(--border);border-radius:16px;
  padding:64px 20px;text-align:center;color:var(--text-tertiary);
}
.info-empty-mark{
  width:56px;height:56px;border-radius:16px;background:var(--surface-muted);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 16px;font-size:24px;
}
.info-empty-text{font-size:15px;line-height:1.6}
.info-empty-text strong{color:var(--text-secondary);font-weight:600}

@media(max-width:1020px){
  .info-item{grid-template-columns:120px minmax(0,1fr) 130px}
}
@media(max-width:820px){
  .info-item{grid-template-columns:1fr;gap:12px;padding:20px}
  .info-date{display:none}
  .info-row-meta{grid-template-columns:1fr auto;margin-top:8px}
}

/* ===== FAQ 手风琴 ===== */
.faq-section{background:var(--bg-canvas)}
.faq-wrap{
  display:grid;grid-template-columns:.8fr 1.2fr;gap:52px;
  align-items:start;
}
.faq-left-title{
  font-size:32px;font-weight:700;line-height:1.4;margin-bottom:14px;
  color:var(--text-main);letter-spacing:-.01em;
}
.faq-left-desc{font-size:15px;color:var(--text-secondary);line-height:1.8;margin-bottom:24px}
.faq-left-more{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-weight:600;font-size:15px;
}
.faq-left-more span{transition:transform .2s ease}
.faq-left-more:hover span{transform:translateX(4px)}

.faq-accordion{display:flex;flex-direction:column;gap:14px}
.faq-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:14px;overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-card.is-active{border-color:var(--primary);box-shadow:var(--shadow-regular)}
.faq-trigger{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:20px 22px;text-align:left;
  font-size:16px;font-weight:600;color:var(--text-main);line-height:1.5;
  transition:background .2s ease;
}
.faq-trigger:hover{background:var(--primary-soft)}
.faq-card.is-active .faq-trigger{color:var(--primary);background:var(--primary-soft)}
.faq-icon{
  position:relative;flex:none;width:22px;height:22px;border-radius:50%;
  border:1px solid var(--border);background:var(--surface);
  transition:all .25s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;
  background:var(--primary);transition:all .25s ease;
}
.faq-icon::before{width:10px;height:1.6px;transform:translate(-50%,-50%)}
.faq-icon::after{width:1.6px;height:10px;transform:translate(-50%,-50%)}
.faq-card.is-active .faq-icon{background:var(--primary);border-color:var(--primary)}
.faq-card.is-active .faq-icon::before{background:#fff}
.faq-card.is-active .faq-icon::after{background:#fff;transform:translate(-50%,-50%) rotate(90deg)}
.faq-answer{
  display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease;
}
.faq-card.is-active .faq-answer{grid-template-rows:1fr}
.faq-answer-inner{overflow:hidden}
.faq-answer-text{
  padding:2px 22px 20px;font-size:15px;color:var(--text-secondary);line-height:1.85;
}

@media(max-width:980px){
  .faq-wrap{grid-template-columns:1fr;gap:28px}
}

/* ===== CTA 区块 ===== */
.cta-panel{
  border-radius:22px;padding:60px 64px;
  background:linear-gradient(145deg,var(--primary-soft),#f6f4ec);
  border:1px solid var(--border-light);
  text-align:center;position:relative;overflow:hidden;
}
.cta-panel::before{
  content:"kaiyun";
  position:absolute;right:-20px;bottom:-44px;
  font-size:150px;font-weight:800;color:rgba(42,110,166,.05);
  letter-spacing:-5px;line-height:1;pointer-events:none;
}
.cta-title{font-size:32px;font-weight:700;line-height:1.45;margin-bottom:14px}
.cta-desc{font-size:16px;color:var(--text-secondary);max-width:560px;margin:0 auto 32px}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.cta-note{font-size:12px;color:var(--text-tertiary);margin-top:24px;line-height:1.6}
@media(max-width:768px){
  .cta-panel{padding:42px 22px;border-radius:18px}
  .cta-title{font-size:26px}
}

/* ===== Footer ===== */
.site-footer{
  background:var(--surface);
  border-top:1px solid var(--border);
  padding:64px 0 30px;
  margin-top:auto;
}
.site-footer a:hover{color:var(--primary)}
.footer-wrapper{max-width:1160px;margin:0 auto;padding:0 40px}
.footer-grid{
  display:grid;grid-template-columns:1.3fr .8fr .8fr 1.1fr;
  gap:48px;padding-bottom:56px;border-bottom:1px solid var(--border-light);
}
.footer-brand .brand-wrap{margin-bottom:14px;padding:0}
.footer-desc{font-size:14px;color:var(--text-tertiary);line-height:1.9;max-width:240px}
.footer-heading{
  font-size:15px;font-weight:700;margin-bottom:20px;color:var(--text-main);
}
.footer-links li{margin-bottom:12px}
.footer-links a{font-size:14px;color:var(--text-secondary);transition:all .2s ease}
.footer-links a:hover{color:var(--primary);padding-left:4px}
.footer-info-list li{
  display:flex;align-items:center;gap:10px;
  font-size:14px;color:var(--text-secondary);
  margin-bottom:14px;line-height:1.7;
}
.footer-status-dot{width:8px;height:8px;border-radius:50%;background:var(--success);flex:none}
.footer-copyright{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding-top:24px;font-size:13px;color:var(--text-tertiary);
}
.footer-copyright-links{display:inline-flex;gap:18px}
.footer-copyright-links span::after{content:"·";margin-left:10px;color:var(--border)}
.footer-copyright-links span:last-child::after{display:none}

@media(max-width:920px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .footer-wrapper{padding:0 20px}
}
@media(max-width:600px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-copyright{flex-direction:column;align-items:flex-start}
  .section{padding:56px 0}
}

/* roulang page: article */
:root {
            --color-bg-canvas: #F4F8FC;
            --color-surface: #FFFFFF;
            --color-surface-muted: #ECF2F8;
            --color-primary: #2A6EA6;
            --color-primary-soft: #E7F0F8;
            --color-accent: #D18A2A;
            --color-text-main: #243949;
            --color-text-secondary: #5C7285;
            --color-text-tertiary: #93A7B8;
            --color-border: #DCE6EF;
            --color-border-light: #EAF1F7;
            --color-success: #368B6B;
            --color-warning: #B47D2E;
            --color-error: #BC4A4A;
            --shadow-card: 0 1px 2px rgba(33, 61, 84, 0.05), 0 6px 18px rgba(33, 61, 84, 0.06);
            --shadow-hover: 0 2px 4px rgba(33, 61, 84, 0.06), 0 16px 32px rgba(33, 61, 84, 0.10);
            --radius-md: 8px;
            --radius-lg: 12px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 248px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text-main);
            background-color: var(--color-bg-canvas);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition), background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        a:hover {
            color: #1E527D;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(42, 110, 166, 0.4);
            outline-offset: 2px;
        }

        ul {
            list-style: none;
        }

        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-surface);
            border-right: 1px solid var(--color-border-light);
            display: flex;
            flex-direction: column;
            padding: 28px 20px 24px;
            z-index: 100;
            transition: transform 0.3s ease;
        }

        .brand .brand-link {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-text-main);
            font-weight: 700;
            font-size: 21px;
            line-height: 1.3;
            padding: 0 6px;
        }

        .brand .brand-link:hover {
            color: var(--color-primary);
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            border-radius: 9px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 17px;
            flex: 0 0 36px;
        }

        .brand-text {
            letter-spacing: 0.02em;
        }

        .sidebar-nav {
            margin-top: 36px;
            flex: 0 0 auto;
        }

        .nav-section-title {
            font-size: 12px;
            color: var(--color-text-tertiary);
            padding: 0 12px;
            margin-bottom: 10px;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            font-weight: 600;
        }

        .nav-items {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            min-height: 44px;
            padding: 0 12px;
            border-radius: 8px;
            color: var(--color-text-secondary);
            font-size: 15px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: background-color var(--transition), color var(--transition), border-color var(--transition);
        }

        .nav-item:hover {
            background-color: var(--color-primary-soft);
            color: var(--color-primary);
        }

        .nav-item.active {
            background-color: transparent;
            color: var(--color-primary);
            font-weight: 700;
            border-left-color: var(--color-primary);
        }

        .nav-icon {
            font-size: 18px;
            width: 20px;
            text-align: center;
            line-height: 1;
        }

        .sidebar-divider {
            border-top: 1px solid var(--color-border-light);
            margin: 20px 4px;
        }

        .sidebar-footer {
            margin-top: auto;
            padding: 14px 12px 4px;
            background: var(--color-surface-muted);
            border-radius: var(--radius-md);
        }

        .sidebar-footer-text {
            font-size: 12px;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        .sidebar-footer-text strong {
            display: block;
            font-size: 13px;
            color: var(--color-text-main);
            margin-bottom: 2px;
        }

        /* ===== Directory overlay ===== */
        .nav-overlay {
            display: none;
        }

        .nav-overlay.active {
            display: block;
            position: fixed;
            inset: 0;
            background: rgba(36, 57, 73, 0.4);
            z-index: 999;
            border: none;
        }

        /* ===== Topbar (mobile) ===== */
        .topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1000;
            height: 64px;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: 10px 20px;
            align-items: center;
            justify-content: space-between;
        }

        .topbar-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 18px;
            color: var(--color-text-main);
        }

        .topbar-logo .brand-icon {
            width: 32px;
            height: 32px;
            font-size: 15px;
            flex-basis: 32px;
            border-radius: 8px;
        }

        .hamburger-btn,
        .drawer-close-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: transparent;
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            color: var(--color-text-main);
            transition: background-color var(--transition);
            font-size: 18px;
        }

        .hamburger-btn:hover,
        .drawer-close-btn:hover {
            background: var(--color-primary-soft);
        }

        /* ===== Main Content Area ===== */
        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            padding: 48px 40px 60px;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        .content-wrapper {
            max-width: 1160px;
            width: 100%;
            margin: 0 auto;
            flex: 1;
        }

        .content-inner {
            max-width: 780px;
            margin: 0 auto;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--color-text-tertiary);
            margin-bottom: 22px;
            line-height: 1.5;
        }

        .breadcrumb a {
            color: var(--color-text-tertiary);
            display: inline-block;
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
        }

        .breadcrumb-sep {
            display: inline-block;
            margin: 0 2px;
        }

        .breadcrumb-current {
            color: var(--color-text-secondary);
            max-width: 260px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ===== Article Header ===== */
        .article-header {
            margin-bottom: 30px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--color-border-light);
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            margin-bottom: 16px;
            font-size: 13px;
            color: var(--color-text-tertiary);
        }

        .article-meta-cat {
            background: var(--color-primary-soft);
            color: var(--color-primary);
            border-radius: 6px;
            padding: 3px 12px;
            font-size: 13px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-meta-dot {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--color-text-tertiary);
            display: inline-block;
        }

        .article-title {
            font-size: 32px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--color-text-main);
            letter-spacing: 0.01em;
            margin: 4px 0 0;
        }

        /* ===== Article Content ===== */
        .article-body {
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text-main);
            overflow-wrap: break-word;
        }

        .article-body p {
            margin-bottom: 1.2em;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-text-main);
            margin: 1.8em 0 0.6em;
            line-height: 1.4;
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-text-main);
            margin: 1.5em 0 0.5em;
            line-height: 1.5;
        }

        .article-body img {
            border-radius: var(--radius-lg);
            margin: 20px 0;
        }

        .article-body ul,
        .article-body ol {
            margin: 1em 0 1.2em;
            padding-left: 1.4em;
        }

        .article-body ul {
            list-style: disc;
        }

        .article-body ul li,
        .article-body ol li {
            margin-bottom: 6px;
        }

        .article-body ol {
            list-style: decimal;
        }

        .article-body a {
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(42, 110, 166, 0.3);
            font-weight: 500;
        }

        .article-body a:hover {
            text-decoration-color: rgba(42, 110, 166, 0.8);
        }

        .article-body blockquote {
            border-left: 3px solid var(--color-primary);
            background: var(--color-primary-soft);
            margin: 20px 0;
            padding: 14px 20px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--color-text-secondary);
            font-style: normal;
        }

        .article-body code {
            background: var(--color-surface-muted);
            padding: 2px 7px;
            border-radius: 5px;
            font-size: 0.92em;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
        }

        .article-body pre {
            background: var(--color-surface-muted);
            border-radius: var(--radius-lg);
            padding: 18px 20px;
            overflow-x: auto;
            margin: 20px 0;
            border: 1px solid var(--color-border-light);
            line-height: 1.7;
        }

        .article-body pre code {
            background: none;
            padding: 0;
        }

        /* ===== Article Not Found ===== */
        .content-empty {
            background: var(--color-surface);
            border: 1px dashed var(--color-border);
            border-radius: var(--radius-lg);
            padding: 80px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
        }

        .content-empty-icon {
            width: 64px;
            height: 64px;
            background: var(--color-primary-soft);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 28px;
            color: var(--color-primary);
        }

        .content-empty h2 {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-text-main);
            margin-bottom: 12px;
        }

        .content-empty p {
            color: var(--color-text-secondary);
            margin-bottom: 20px;
            font-size: 15px;
        }

        .content-empty .btn {
            display: inline-block;
        }

        /* ===== Related ===== */
        .related-section {
            margin-top: 50px;
            border-top: 1px solid var(--color-border-light);
            padding-top: 34px;
        }

        .related-title {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 22px;
            color: var(--color-text-main);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(index);
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .related-card {
            display: flex;
            background: var(--color-surface);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 18px;
            gap: 16px;
            align-items: center;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: var(--color-border);
        }

        .related-thumb {
            border-radius: var(--radius-md);
            background: var(--color-primary-soft);
            flex: 0 0 80px;
            height: 80px;
            object-fit: cover;
        }

        .related-content {
            flex: 1;
            min-width: 0;
        }

        .related-content a {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-main);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }

        .related-content a:hover {
            color: var(--color-primary);
        }

        .related-content p {
            font-size: 13px;
            color: var(--color-text-tertiary);
            margin-top: 5px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            text-decoration: none;
            transition: box-shadow var(--transition), transform var(--transition), background-color var(--transition);
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--color-primary);
            color: #ffffff;
        }

        .btn-primary:hover {
            background-color: #1E527D;
            color: #ffffff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }

        .btn-primary:active {
            background-color: #194B77;
            transform: translateY(0);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-primary);
            border: 1px solid var(--color-border);
        }

        .btn-secondary:hover {
            border-color: var(--color-primary);
            background-color: var(--color-primary-soft);
            color: var(--color-primary);
        }

        .btn-secondary:active {
            background-color: rgba(42, 110, 166, 0.12);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            padding: 50px 40px 24px;
            margin-left: var(--sidebar-width);
        }

        .footer-wrapper {
            max-width: 1160px;
            margin: 0 auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 38px;
            margin-bottom: 40px;
        }

        .footer-brand .brand-wrap {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .brand-logo-square {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: var(--color-primary);
            color: #fff;
            border-radius: 9px;
            font-weight: 700;
            font-size: 16px;
            flex: 0 0 34px;
        }

        .brand-text {
            font-weight: 700;
            font-size: 18px;
            color: var(--color-text-main);
        }

        .footer-desc {
            color: var(--color-text-secondary);
            font-size: 14px;
            line-height: 1.8;
            margin-top: 12px;
            max-width: 300px;
        }

        .footer-col .footer-heading {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-text-main);
            margin-bottom: 14px;
        }

        .footer-links li {
            margin-bottom: 9px;
        }

        .footer-links a {
            color: var(--color-text-secondary);
            font-size: 14px;
            transition: color var(--transition);
        }

        .footer-links a:hover {
            color: var(--color-primary);
        }

        .footer-info-list li {
            font-size: 13px;
            color: var(--color-text-secondary);
            display: flex;
            align-items: center;
            gap: 7px;
            margin-bottom: 9px;
            line-height: 1.5;
        }

        .footer-status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-success);
            display: inline-block;
            flex: 0 0 6px;
        }

        .footer-copyright {
            border-top: 1px solid var(--color-border-light);
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--color-text-tertiary);
        }

        .footer-copyright-links {
            display: flex;
            gap: 15px;
        }

        .footer-copyright-links span {
            cursor: default;
        }

        /* ===== Mobile Drawer ===== */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: var(--color-surface);
            z-index: 1100;
            transform: translateX(-105%);
            transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 24px 20px;
            display: flex;
            flex-direction: column;
            box-shadow: 2px 0 20px rgba(33, 61, 84, 0.15);
        }

        .mobile-drawer.open {
            transform: translateX(0);
        }

        .drawer-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 28px;
        }

        .drawer-logo {
            display: flex;
            align-items: center;
            gap: 9px;
            font-weight: 700;
            font-size: 18px;
            color: var(--color-text-main);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1100px) {
            .sidebar {
                display: none;
            }

            .topbar {
                display: flex;
            }

            .main-content {
                margin-left: 0;
                padding: 32px 24px 48px;
            }

            .article-title {
                font-size: 26px;
            }

            .site-footer {
                margin-left: 0;
                padding: 40px 24px 20px;
            }
        }

        @media (max-width: 768px) {
            .topbar {
                padding: 10px 15px;
            }

            .main-content {
                padding: 28px 16px 40px;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .article-title {
                font-size: 24px;
            }

            .article-meta {
                gap: 8px;
                font-size: 12px;
            }

            .article-body h2 {
                font-size: 21px;
            }

            .article-body h3 {
                font-size: 18px;
            }

            .website-footer {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .footer-copyright {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .topbar-logo .brand-text {
                font-size: 16px;
            }

            .main-content {
                padding: 24px 12px 36px;
            }

            .breadcrumb {
                margin-bottom: 16px;
                font-size: 12px;
            }

            .article-title {
                font-size: 21px;
            }

            .article-meta .article-meta-dot:nth-of-type(2n) {
                display: none;
            }

            .content-empty {
                padding: 50px 22px;
            }

            .article-body {
                font-size: 15px;
            }

            .related-title {
                font-size: 20px;
            }

            .related-grid {
                gap: 14px;
                grid-template-columns: 1fr;
            }

            .site-footer {
                padding: 32px 16px 18px;
            }
        }

/* roulang page: category1 */
:root {
  --color-bg-canvas: #F4F8FC;
  --color-surface: #FFFFFF;
  --color-surface-muted: #ECF2F8;
  --color-primary: #2A6EA6;
  --color-primary-soft: #E7F0F8;
  --color-accent: #D18A2A;
  --color-text-main: #243949;
  --color-text-secondary: #5C7285;
  --color-text-tertiary: #93A7B8;
  --color-border: #DCE6EF;
  --color-border-light: #EAF1F7;
  --color-success: #368B6B;
  --color-warning: #B47D2E;
  --color-error: #BC4A4A;
  --shadow-card: 0 1px 2px rgba(33, 61, 84, 0.05), 0 6px 18px rgba(33, 61, 84, 0.06);
  --shadow-hover: 0 2px 4px rgba(33, 61, 84, 0.06), 0 16px 32px rgba(33, 61, 84, 0.10);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --sidebar-width: 248px;
  --space-main: 48px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--color-bg-canvas);
  color: var(--color-text-main);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
}
ul, ol, p, h1, h2, h3, figure {
  margin: 0;
  padding: 0;
}
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}
img {
  display: block;
  max-width: 100%;
}
button, input, summary {
  font-family: inherit;
  font-size: inherit;
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(42, 110, 166, 0.28);
  outline-offset: 2px;
  border-radius: 6px;
}
.app-shell {
  display: flex;
  min-height: 100vh;
}
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 60;
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border-light);
  padding: 28px 18px 20px;
  display: flex;
  flex-direction: column;
}
.sidebar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}
.brand-wrap {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-main);
  transition: opacity .2s ease;
}
.brand-wrap:hover {
  opacity: 0.82;
}
.brand-logo-square {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 36px;
}
.brand-text {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.2px;
  color: #1D405E;
}
.sidebar-close {
  display: none;
  border: 0;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.nav-group-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  padding: 12px 12px 4px;
}
.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: background .2s ease, color .2s ease;
}
.nav-item:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.nav-item.active {
  color: var(--color-primary);
  font-weight: 700;
  background: transparent;
  box-shadow: inset 3px 0 0 var(--color-primary);
}
.nav-item.active:hover {
  background: transparent;
}
.nav-icon {
  display: inline-flex;
  width: 20px;
  font-size: 16px;
  color: var(--color-text-tertiary);
}
.nav-item.active .nav-icon {
  color: var(--color-primary);
}
.sidebar-footer {
  margin-top: auto;
  padding: 18px 12px 2px;
  border-top: 1px solid var(--color-border-light);
  font-size: 13px;
  color: var(--color-text-tertiary);
  line-height: 1.7;
}
.side-note {
  display: block;
  font-weight: 600;
  color: var(--color-text-secondary);
}
.sidebar-overlay {
  display: none;
}
.mobile-header {
  display: none;
}
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-primary);
  font-size: 22px;
  cursor: pointer;
}
.main-area {
  flex: 1;
  min-width: 0;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
}
.page-main {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 48px 40px 72px;
}
.section-block {
  margin-bottom: 48px;
}
.section-header {
  max-width: 860px;
  margin-bottom: 26px;
}
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.section-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.section-header h2 {
  font-size: 28px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 12px;
}
.section-header p {
  color: var(--color-text-secondary);
  font-size: 16px;
}
.hero-section {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 40px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-card);
  border-radius: var(--radius-lg);
  padding: 44px;
  margin-bottom: 48px;
  align-items: center;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border: 1px solid rgba(42, 110, 166, 0.12);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 16px;
}
.hero-section h1 {
  margin: 0 0 16px;
  font-size: 34px;
  line-height: 1.3;
  font-weight: 700;
}
.hero-desc {
  color: var(--color-text-secondary);
  font-size: 16px;
  max-width: 560px;
  margin-bottom: 24px;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-surface-muted);
  border: 1px solid var(--color-border-light);
  color: var(--color-text-secondary);
  font-size: 13px;
  border-radius: 999px;
  padding: 5px 12px;
}
.hero-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
}
.hero-visual {
  position: relative;
}
.hero-visual .visual-frame {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow-card);
}
.visual-note {
  position: absolute;
  left: 18px;
  bottom: 16px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--color-border-light);
  color: var(--color-text-main);
  font-size: 13px;
  font-weight: 500;
  border-radius: 999px;
  padding: 5px 14px;
  box-shadow: 0 2px 10px rgba(33, 61, 84, 0.06);
}
.content-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.content-intro-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease;
}
.content-intro-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.card-index {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 8px;
}
.content-intro-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 10px;
  line-height: 1.4;
}
.content-intro-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}
.twin-media-section {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 32px;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 0 36px;
  overflow: hidden;
}
.twin-copy {
  grid-column: span 6;
  padding: 40px 0 40px 8px;
}
.twin-copy h2 {
  font-size: 28px;
  line-height: 1.35;
  font-weight: 700;
  margin-bottom: 14px;
}
.twin-copy > p {
  color: var(--color-text-secondary);
  font-size: 15px;
  margin-bottom: 20px;
}
.plain-list {
  list-style: none;
  margin-bottom: 20px;
}
.plain-list li {
  position: relative;
  padding-left: 24px;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
  font-size: 15px;
}
.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--color-primary);
}
.twin-media {
  grid-column: span 6;
  padding: 30px 0;
}
.twin-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 4px rgba(33, 61, 84, 0.05), 0 16px 32px rgba(33, 61, 84, 0.10);
}
.steps-section {
  background: transparent;
  padding: 0;
  border: 0;
}
.steps-header {
  max-width: 860px;
  margin-bottom: 30px;
}
.steps-header h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 10px;
}
.steps-header p {
  color: var(--color-text-secondary);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.step-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 32px 26px 26px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: box-shadow .25s ease, transform .25s ease;
}
.step-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 20px;
  border: 1px solid rgba(42, 110, 166, 0.14);
}
.step-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}
.step-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}
.reader-section {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 28px;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 40px 36px;
}
.reader-copy {
  grid-column: span 7;
}
.reader-copy h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.35;
}
.reader-copy > p {
  color: var(--color-text-secondary);
  margin-bottom: 22px;
  font-size: 15px;
}
.reader-copy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 20px;
}
.reader-item {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  color: var(--color-text-main);
  font-size: 14px;
  background: var(--color-surface-muted);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.reader-item strong {
  display: block;
  color: var(--color-text-main);
  font-weight: 700;
  margin-bottom: 4px;
}
.reader-item span {
  color: var(--color-text-secondary);
  line-height: 1.65;
}
.reader-media {
  grid-column: span 5;
}
.reader-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}
.faq-wrap {
  max-width: 920px;
  margin: 0 auto;
}
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0 22px;
  margin-bottom: 12px;
  box-shadow: 0 1px 2px rgba(33, 61, 84, 0.02);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  font-weight: 600;
  color: var(--color-text-main);
  font-size: 16px;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary:hover {
  color: var(--color-primary);
}
.faq-icon {
  flex: 0 0 26px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 300;
  line-height: 1;
  transition: transform .25s ease, background .25s ease;
}
.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  background: var(--color-primary);
  color: #fff;
}
.faq-answer {
  padding: 2px 0 18px;
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.8;
  max-width: 820px;
}
.cta-section {
  margin-top: 10px;
  margin-bottom: 48px;
}
.cta-panel {
  background: var(--color-primary-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 44px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}
.cta-copy {
  flex: 1 1 360px;
}
.cta-copy h2 {
  font-size: 26px;
  line-height: 1.4;
  margin-bottom: 10px;
  font-weight: 700;
}
.cta-copy p {
  color: var(--color-text-secondary);
  max-width: 560px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 26px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: #245D8E;
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(42, 110, 166, 0.16);
}
.btn-primary:active {
  transform: translateY(0);
  background: #1F537F;
}
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  background: #F6FAFE;
  transform: translateY(-1px);
}
.site-footer {
  width: 100%;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
  padding: 48px 40px 22px;
}
.footer-wrapper {
  max-width: 1160px;
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 32px;
  padding-bottom: 28px;
}
.footer-brand .brand-wrap {
  margin-bottom: 14px;
}
.footer-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-top: 10px;
  max-width: 360px;
}
.footer-heading {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 14px;
  line-height: 1.5;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.footer-links a {
  color: var(--color-text-secondary);
  font-size: 14px;
}
.footer-links a:hover {
  color: var(--color-primary);
}
.footer-info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
  color: var(--color-text-secondary);
  font-size: 14px;
}
.footer-status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  margin-right: 6px;
}
.footer-copyright {
  border-top: 1px solid var(--color-border-light);
  padding-top: 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--color-text-tertiary);
  font-size: 13px;
}
.footer-copyright-links {
  display: flex;
  gap: 16px;
}
.site-footer a {
  color: var(--color-text-secondary);
}
.announce-panel {
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--color-text-secondary);
  font-size: 14px;
  margin-top: 20px;
}
@media (max-width: 1280px) {
  .page-main {
    max-width: 1080px;
  }
}
@media (max-width: 1100px) {
  .sidebar {
    width: 290px;
    transform: translateX(-102%);
    transition: transform .28s ease;
    box-shadow: 14px 0 30px rgba(33, 61, 84, 0.1);
    overflow-y: auto;
  }
  body.sidebar-open .sidebar {
    transform: translateX(0);
  }
  .main-area {
    margin-left: 0;
  }
  .sidebar-close {
    display: flex;
  }
  .mobile-header {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 20px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border-light);
  }
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(36, 57, 73, 0.4);
    opacity: 0;
    visibility: hidden;
    z-index: 55;
    transition: opacity .28s ease;
  }
  body.sidebar-open .sidebar-overlay {
    opacity: 1;
    visibility: visible;
  }
  .page-main {
    padding: 40px 24px 60px;
  }
  .hero-section {
    padding: 32px;
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .content-card-grid,
  .steps-grid {
    grid-template-columns: 1fr 1fr;
  }
  .twin-media-section {
    padding: 0 26px;
  }
  .reader-section {
    padding: 32px 28px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 768px) {
  .page-main {
    padding: 28px 18px 52px;
  }
  .hero-section {
    padding: 24px 20px;
  }
  .hero-section h1 {
    font-size: 28px;
  }
  .section-header h2,
  .twin-copy h2,
  .reader-copy h2,
  .steps-header h2 {
    font-size: 24px;
  }
  .content-card-grid,
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .twin-media-section,
  .reader-section {
    grid-template-columns: 1fr;
    padding: 22px 18px;
    gap: 14px;
  }
  .twin-copy,
  .twin-media,
  .reader-copy,
  .reader-media {
    grid-column: span 1;
  }
  .twin-copy {
    padding: 24px 0 8px;
  }
  .twin-media {
    padding: 0 0 24px;
  }
  .reader-copy-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .cta-panel {
    padding: 30px 22px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .site-footer {
    padding: 36px 18px 20px;
  }
  .footer-copyright {
    flex-direction: column;
    align-items: flex-start;
  }
  .footer-copyright-links {
    flex-wrap: wrap;
  }
}
@media (max-width: 520px) {
  .hero-badges {
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-actions {
    width: 100%;
    flex-direction: column;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .visual-note {
    left: 12px;
    bottom: 12px;
    max-width: calc(100% - 24px);
  }
  .content-intro-card {
    padding: 22px;
  }
  .faq-item {
    padding: 0 16px;
  }
}

/* roulang page: category2 */
:root{
  --color-bg-canvas:#F4F8FC;
  --color-surface:#FFFFFF;
  --color-surface-muted:#ECF2F8;
  --color-primary:#2A6EA6;
  --color-primary-soft:#E7F0F8;
  --color-accent:#D18A2A;
  --color-text-main:#243949;
  --color-text-secondary:#5C7285;
  --color-text-tertiary:#93A7B8;
  --color-border:#DCE6EF;
  --color-border-light:#EAF1F7;
  --color-success:#368B6B;
  --color-warning:#B47D2E;
  --color-error:#BC4A4A;
  --shadow-card:0 1px 2px rgba(33,61,84,.05),0 6px 18px rgba(33,61,84,.06);
  --shadow-hover:0 2px 4px rgba(33,61,84,.06),0 16px 32px rgba(33,61,84,.10);
  --radius-md:8px;
  --radius-lg:12px;
  --radius-xl:16px;
  --font-main:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-main);background:var(--color-bg-canvas);color:var(--color-text-main);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input{font:inherit;color:inherit}
ul,ol{list-style:none}
:focus-visible{outline:3px solid rgba(42,110,166,.35);outline-offset:2px;border-radius:var(--radius-md)}

.app-shell{min-height:100vh;width:100%;background:var(--color-bg-canvas)}

.mobile-header{display:none;position:sticky;top:0;z-index:80;height:64px;padding:0 20px;align-items:center;justify-content:space-between;background:var(--color-surface);border-bottom:1px solid var(--color-border-light)}
.nav-toggle{width:44px;height:44px;border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer}
.nav-toggle span{width:18px;height:2px;border-radius:2px;background:var(--color-text-main);display:block;transition:transform .25s}
.nav-toggle:hover{border-color:var(--color-primary);background:var(--color-primary-soft)}
.nav-toggle:active{transform:scale(.98)}

.sidebar-overlay{position:fixed;inset:0;z-index:105;background:rgba(24,44,65,.35);opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s}
.sidebar-overlay.is-visible{opacity:1;visibility:visible}

.sidebar{position:fixed;inset:auto 0 0 auto;width:280px;height:100%;top:0;left:0;background:var(--color-surface);border-right:1px solid var(--color-border-light);z-index:110;transform:translateX(-100%);transition:transform .3s ease,box-shadow .3s ease;display:flex;flex-direction:column}
.sidebar.is-open{transform:translateX(0);box-shadow:0 0 40px rgba(23,48,72,.20)}
.sidebar-top{display:flex;align-items:center;justify-content:space-between;padding:24px 22px 18px 24px}
.sidebar-close{width:38px;height:38px;border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);font-size:20px;line-height:1;display:none;align-items:center;justify-content:center;cursor:pointer;color:var(--color-text-secondary)}
.sidebar-close:hover{border-color:var(--color-primary);background:var(--color-primary-soft);color:var(--color-primary)}

.sidebar-inner{flex:1;display:flex;flex-direction:column;padding:0 16px 22px;overflow-y:auto}
.logo-area{display:flex;align-items:center;padding:0 6px 0 0}
.brand-wrap{display:inline-flex;align-items:center;gap:10px;min-width:0}
.brand-logo-square{width:38px;height:38px;flex:none;background:linear-gradient(135deg,#3D87B9,#1F5A86);color:#fff;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;font-size:18px;font-weight:800;box-shadow:0 4px 10px rgba(31,90,134,.18)}
.brand-text{font-size:21px;font-weight:800;color:var(--color-text-main);letter-spacing:.2px;white-space:nowrap}
.nav-section{display:flex;flex-direction:column;gap:2px;margin-top:20px}
.nav-section + .nav-section{margin-top:14px;padding-top:4px}
.nav-group-label{font-size:12px;font-weight:700;letter-spacing:.8px;color:var(--color-text-tertiary);padding:4px 12px 8px}
.nav-item{position:relative;display:flex;align-items:center;gap:11px;width:100%;height:44px;padding:0 13px;border-radius:var(--radius-md);font-size:15px;color:var(--color-text-secondary);transition:background .18s,color .18s,border-color .18s}
.nav-item:hover{background:var(--color-primary-soft);color:var(--color-primary)}
.nav-item.active{background:var(--color-primary-soft);color:var(--color-primary);font-weight:700}
.nav-item.active::before{content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:var(--color-primary)}
.nav-icon{width:20px;flex:none;text-align:center;font-size:17px;line-height:1}
.sidebar-hint{margin-top:auto;padding:14px 14px 4px;border-top:1px solid var(--color-border-light);display:flex;align-items:flex-start;gap:8px;color:var(--color-text-tertiary);font-size:13px;line-height:1.6}
.sidebar-hint-dot{width:7px;height:7px;flex:none;border-radius:50%;background:var(--color-success);margin-top:8px;box-shadow:0 0 0 4px rgba(54,139,107,.12)}
.sidebar-hint span{display:block}

.main-shell{margin-left:280px;transition:margin .3s ease}
.category-page{max-width:1180px;margin:0 auto;padding:58px 48px 80px}

.page-hero{display:grid;grid-template-columns:1.05fr .9fr;gap:56px;align-items:center;margin-bottom:56px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:1px;color:var(--color-primary);background:var(--color-primary-soft);padding:6px 14px;border-radius:999px;margin-bottom:22px}
.hero-title{font-size:38px;line-height:1.35;font-weight:800;color:var(--color-text-main);letter-spacing:.4px;margin-bottom:18px}
.hero-lead{font-size:17px;line-height:1.9;color:var(--color-text-secondary);margin-bottom:32px;max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.hero-badges{display:flex;gap:12px;flex-wrap:wrap}
.hero-badge{display:inline-flex;align-items:center;gap:7px;background:var(--color-surface);border:1px solid var(--color-border-light);border-radius:999px;padding:7px 15px;font-size:13px;color:var(--color-text-secondary);white-space:nowrap}
.hero-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--color-primary);opacity:.7}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-xl);border:1px solid var(--color-border);box-shadow:var(--shadow-card);background:var(--color-surface)}

.anchor-nav{display:flex;flex-wrap:wrap;align-items:center;gap:10px;background:var(--color-surface);border:1px solid var(--color-border-light);border-radius:var(--radius-lg);padding:14px 16px;margin-bottom:66px;box-shadow:var(--shadow-card)}
.anchor-label{color:var(--color-text-tertiary);font-size:13px;font-weight:700;letter-spacing:.4px;padding-right:6px}
.anchor-nav a{display:inline-flex;align-items:center;min-height:34px;padding:0 13px;border-radius:999px;background:var(--color-primary-soft);color:var(--color-primary);font-size:13px;font-weight:600;transition:background .18s,color .18s,transform .18s}
.anchor-nav a:hover{background:var(--color-primary);color:#fff}

.content-section{margin-bottom:88px}
.section-head{margin-bottom:32px;max-width:720px}
.section-kicker{display:block;font-size:13px;font-weight:700;letter-spacing:.8px;color:var(--color-accent);margin-bottom:8px}
.section-title{font-size:29px;font-weight:800;letter-spacing:.2px;color:var(--color-text-main);line-height:1.45}
.section-intro{margin-top:10px;font-size:16px;color:var(--color-text-secondary);line-height:1.9}

.column-map{display:grid;grid-template-columns:1.05fr .8fr;gap:48px;align-items:center}
.column-entry{display:flex;gap:16px;padding:22px 0;border-bottom:1px solid var(--color-border-light)}
.column-entry:first-child{padding-top:0}
.column-index{font-size:14px;font-weight:800;color:var(--color-primary);letter-spacing:.5px;padding-top:3px;flex:none;min-width:34px}
.column-entry h3{font-size:17px;font-weight:700;color:var(--color-text-main);margin-bottom:4px}
.column-entry p{font-size:15px;color:var(--color-text-secondary);line-height:1.8}
.column-figure img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:var(--radius-xl);border:1px solid var(--color-border);box-shadow:var(--shadow-card)}

.process-list{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;align-items:start}
.process-step{background:var(--color-surface);border:1px solid var(--color-border-light);border-radius:var(--radius-xl);padding:30px 26px 32px;position:relative;box-shadow:var(--shadow-card);transition:transform .2s,box-shadow .2s}
.process-step:nth-child(2){margin-top:22px}
.process-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.process-num{display:block;font-size:16px;font-weight:800;color:var(--color-accent);letter-spacing:1px;border-bottom:1px solid var(--color-border);padding-bottom:16px;margin-bottom:20px}
.process-step h3{font-size:18px;font-weight:700;color:var(--color-text-main);margin-bottom:10px}
.process-step p{font-size:15px;color:var(--color-text-secondary);line-height:1.85}
.scenario-grid{display:grid;grid-template-columns:1.2fr .9fr;gap:28px}
.scenario-card{background:var(--color-surface);border-radius:var(--radius-xl);border:1px solid var(--color-border-light);padding:30px;box-shadow:var(--shadow-card);transition:transform .2s,box-shadow .2s}
.scenario-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.scenario-card.scenario-primary{background:var(--color-primary-soft);border-color:rgba(42,110,166,.14);grid-column:1/-1}
.scenario-icon{width:44px;height:44px;border-radius:12px;background:var(--color-primary-soft);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--color-primary);margin-bottom:18px;border:1px solid rgba(42,110,166,.12)}
.scenario-card.scenario-primary .scenario-icon{background:#fff;color:var(--color-primary)}
.scenario-card h3{font-size:18px;font-weight:700;margin-bottom:10px;color:var(--color-text-main)}
.scenario-card p{font-size:15px;color:var(--color-text-secondary);line-height:1.85}
.scenario-note{margin-top:16px;font-size:14px;color:var(--color-text-tertiary);background:rgba(255,255,255,.52);border-radius:var(--radius-md);padding:12px 14px;border-left:3px solid var(--color-primary)}

.update-list{display:grid;gap:18px;grid-template-columns:repeat(2,1fr)}
.update-item{background:var(--color-surface);border:1px solid var(--color-border-light);border-radius:var(--radius-lg);padding:22px 24px;display:flex;gap:14px;box-shadow:var(--shadow-card)}
.update-icon{width:12px;height:12px;flex:none;border-radius:3px;background:var(--color-primary);margin-top:9px;opacity:.8}
.update-item:nth-child(2) .update-icon{background:var(--color-success)}
.update-item:nth-child(3) .update-icon{background:var(--color-accent)}
.update-item strong{display:block;font-size:16px;color:var(--color-text-main);margin-bottom:5px;font-weight:700}
.update-item span{font-size:14px;color:var(--color-text-secondary);line-height:1.75}

.faq-list{max-width:920px}
.faq-panel{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);margin-bottom:14px;overflow:hidden;box-shadow:0 1px 2px rgba(33,61,84,.03)}
.faq-question{display:flex;align-items:center;justify-content:space-between;width:100%;min-height:58px;padding:0 22px;background:transparent;border:none;cursor:pointer;text-align:left;font-size:16px;font-weight:600;color:var(--color-text-main);transition:background .18s,color .18s}
.faq-question:hover{background:var(--color-primary-soft);color:var(--color-primary)}
.faq-arrow{width:20px;height:20px;flex:none;position:relative;transition:transform .28s}
.faq-arrow::before,.faq-arrow::after{content:"";position:absolute;background:var(--color-primary);border-radius:2px;transition:transform .28s}
.faq-arrow::before{width:10px;height:2px;top:9px;left:5px}
.faq-arrow::after{width:2px;height:10px;top:5px;left:9px}
.faq-panel.is-open .faq-arrow{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;padding:0 22px;background:var(--color-surface);transition:max-height .3s ease,padding .3s ease}
.faq-panel.is-open .faq-answer{max-height:220px;padding:0 22px 20px}
.faq-answer p{padding-top:4px;font-size:15px;color:var(--color-text-secondary);line-height:1.9;border-top:1px solid var(--color-border-light)}

.cta-section{margin-top:8px}
.cta-panel{background:linear-gradient(145deg,#E7EFF6,#F2F7FB);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:48px;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;box-shadow:var(--shadow-card)}
.cta-title{font-size:25px;font-weight:800;color:var(--color-text-main);margin-bottom:10px;letter-spacing:.2px}
.cta-text{font-size:15px;color:var(--color-text-secondary);line-height:1.85;max-width:600px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 26px;border-radius:var(--radius-md);font-size:15px;font-weight:700;border:1px solid transparent;cursor:pointer;transition:background .2s,color .2s,border-color .2s,transform .2s,box-shadow .2s;white-space:nowrap;text-decoration:none;line-height:1}
.btn-primary{background:var(--color-primary);color:#fff}
.btn-primary:hover{background:#357fb9;transform:translateY(-1px)}
.btn-primary:focus-visible{outline:3px solid rgba(42,110,166,.35);outline-offset:2px}
.btn-secondary{background:var(--color-surface);border-color:var(--color-border);color:var(--color-primary)}
.btn-secondary:hover{border-color:var(--color-primary);background:var(--color-primary-soft);transform:translateY(-1px)}

.site-footer{background:var(--color-surface);border-top:1px solid var(--color-border-light);padding:60px 0 0;margin-top:20px}
.footer-wrapper{max-width:1180px;margin:0 auto;padding:0 48px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:52px}
.footer-brand .brand-wrap{margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--color-text-secondary);line-height:1.85;max-width:300px}
.footer-heading{font-size:15px;font-weight:700;color:var(--color-text-main);margin-bottom:16px}
.footer-links li{margin-bottom:11px}
.footer-links a,.footer-info-list span{font-size:14px;color:var(--color-text-secondary);transition:color .18s}
.footer-links a:hover{color:var(--color-primary)}
.footer-info-list li{display:flex;align-items:center;gap:9px;margin-bottom:11px}
.footer-status-dot{width:7px;height:7px;border-radius:50%;background:var(--color-primary);flex:none}
.footer-copyright{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:20px 0 28px;border-top:1px solid var(--color-border-light);color:var(--color-text-tertiary);font-size:13px}
.footer-copyright-links{display:inline-flex;gap:18px}

@media (min-width:1100px){
.sidebar{transform:none;width:280px;box-shadow:6px 0 24px rgba(27,53,76,.03)}
.sidebar-close{display:none!important}
.sidebar-overlay{display:none!important}
.mobile-header{display:none!important}
}

@media (max-width:1099.98px){
.mobile-header{display:flex}
.sidebar-close{display:inline-flex}
.main-shell{margin-left:0}
.category-page{padding:40px 28px 64px}
.footer-wrapper{padding:0 28px}
.footer-grid{grid-template-columns:1fr 1fr;gap:36px}
.page-hero{grid-template-columns:1fr;gap:40px}
.hero-media order-bottom? }
@media (max-width:760px){
.category-page{padding:28px 18px 48px}
.footer-wrapper{padding:0 18px}
.page-hero{grid-template-columns:1fr;gap:34px;margin-bottom:44px}
.hero-title{font-size:30px}
.process-list,.update-list,.scenario-grid{grid-template-columns:1fr}
.column-map{grid-template-columns:1fr;gap:28px}
.anchor-nav{flex-wrap:nowrap;overflow-x:auto;padding:12px;scrollbar-width:none}
.anchor-nav::-webkit-scrollbar{display:none}
.anchor-nav a{flex:none}
.cta-panel{padding:28px 22px}
.footer-grid{grid-template-columns:1fr;gap:28px}
.footer-copyright{flex-direction:column;align-items:flex-start}
.btn{width:100%}
.cta-actions{width:100%}
.cta-actions .btn{flex:1 1 auto}
}
@media (max-width:520px){
.brand-text{font-size:19px}
.hero-title{font-size:26px}
.hero-lead{font-size:15px}
.btn{width:100%}
.hero-actions{width:100%}
.process-step:nth-child(2){margin-top:0}
}
@media (prefers-reduced-motion:reduce){
*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
  --color-bg-canvas:#F4F8FC;
  --color-surface:#FFFFFF;
  --color-surface-muted:#ECF2F8;
  --color-primary:#2A6EA6;
  --color-primary-soft:#E7F0F8;
  --color-accent:#D18A2A;
  --color-text-main:#243949;
  --color-text-secondary:#5C7285;
  --color-text-tertiary:#93A7B8;
  --color-border:#DCE6EF;
  --color-border-light:#EAF1F7;
  --shadow-card:0 1px 2px rgba(33,61,84,0.05),0 6px 18px rgba(33,61,84,0.06);
  --shadow-hover:0 2px 4px rgba(33,61,84,0.06),0 16px 32px rgba(33,61,84,0.10);
  --radius-card:12px;
  --radius-control:8px;
  --nav-width:248px;
  --font-stack:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-stack);
  background:var(--color-bg-canvas);
  color:var(--color-text-main);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--color-primary);text-decoration:none;transition:color .2s,border-color .2s,background .2s;}
a:hover{color:#1f5b8c;}
img{max-width:100%;display:block;border:0;}
ul,ol{list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:none;background:none;}
:focus-visible{outline:3px solid rgba(42,110,166,0.35);outline-offset:2px;border-radius:4px;}

/* 布局骨架 */
.layout-shell{display:flex;min-height:100vh;}
.app-sidebar{
  width:var(--nav-width);
  position:fixed;
  top:0;left:0;bottom:0;
  background:var(--color-surface);
  border-right:1px solid var(--color-border-light);
  display:flex;
  flex-direction:column;
  padding:24px 16px 20px;
  z-index:200;
  box-shadow:0 1px 12px rgba(33,61,84,0.02);
}
.main-content{
  flex:1;
  margin-left:var(--nav-width);
  min-width:0;
  display:flex;
  flex-direction:column;
}
.content-container{
  width:100%;
  max-width:1160px;
  margin:0 auto;
  padding:44px 40px 60px;
}

/* Logo */
.brand-wrap{display:flex;align-items:center;gap:10px;padding:0 6px 4px;}
.brand-logo-square{
  width:36px;height:36px;border-radius:10px;
  background:var(--color-primary);
  color:#fff;font-size:18px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:0;
}
.brand-text{font-size:21px;font-weight:700;color:var(--color-text-main);letter-spacing:0.5px;}
.brand-text span{color:var(--color-primary);}

/* 导航 */
.sidebar-nav-scroll{flex:1;display:flex;flex-direction:column;gap:26px;overflow-y:auto;margin-top:26px;padding-bottom:10px;}
.nav-block-title{
  font-size:12px;text-transform:uppercase;letter-spacing:1px;
  color:var(--color-text-tertiary);font-weight:600;
  padding:0 12px;margin-bottom:8px;
}
.nav-items{display:flex;flex-direction:column;gap:2px;}
.nav-item{
  display:flex;align-items:center;gap:12px;
  height:44px;padding:0 12px;
  border-radius:var(--radius-control);
  font-size:15px;font-weight:500;
  color:var(--color-text-main);
  transition:background .18s,color .18s,box-shadow .18s;
  position:relative;
}
.nav-item:hover{background:var(--color-primary-soft);color:var(--color-primary);}
.nav-item.active{
  color:var(--color-primary);font-weight:700;background:rgba(231,240,248,0.5);
}
.nav-item.active::before{
  content:'';position:absolute;left:-16px;top:10px;bottom:10px;
  width:3px;border-radius:0 2px 2px 0;background:var(--color-primary);
}
.nav-icon{font-size:15px;width:20px;text-align:center;color:var(--color-primary);opacity:0.9;}
.sidebar-footer-box{
  border-top:1px solid var(--color-border-light);
  padding-top:16px;margin-top:10px;
}
.sidebar-footer-box p{font-size:12px;color:var(--color-text-tertiary);line-height:1.6;padding:0 12px;}
.sidebar-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--color-primary-soft);
  color:var(--color-primary);
  font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:12px;
  margin:0 12px 6px;
}

/* 移动抽屉 */
.mobile-topbar{display:none;position:sticky;top:0;z-index:300;height:64px;padding:0 20px;background:var(--color-surface);border-bottom:1px solid var(--color-border-light);align-items:center;justify-content:space-between;}
.mobile-topbar .brand-wrap{padding:0;}
.hamburger-btn{width:40px;height:40px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--color-text-main);background:var(--color-surface);border:1px solid var(--color-border);transition:background .2s,border-color .2s;}
.hamburger-btn:hover{background:var(--color-primary-soft);border-color:var(--color-primary);}
.drawer-overlay{display:none;position:fixed;inset:0;background:rgba(30,52,72,0.35);z-index:400;opacity:0;transition:opacity .3s;}
.drawer-overlay.show{display:block;opacity:1;}
.drawer-panel{
  position:fixed;top:0;left:0;bottom:0;width:280px;
  background:var(--color-surface);
  z-index:410;
  transform:translateX(-100%);
  transition:transform .3s ease;
  display:flex;flex-direction:column;
  padding:24px 16px 20px;
  box-shadow:0 4px 40px rgba(33,61,84,0.18);
  overflow-y:auto;
}
.drawer-panel.open{transform:translateX(0);}
.drawer-close{align-self:flex-end;width:36px;height:36px;display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--color-text-main);background:var(--color-bg-canvas);border-radius:8px;margin-bottom:8px;border:1px solid var(--color-border);}
.drawer-close:hover{background:var(--color-primary-soft);}
.drawer-panel .nav-item.active::before{left:-16px;}

/* Hero 区域 */
.category-hero{
  position:relative;
  background:var(--color-surface);
  border:1px solid var(--color-border-light);
  border-radius:18px;
  overflow:hidden;
  padding:40px 44px;
  box-shadow:var(--shadow-card);
  margin-bottom:34px;
}
.category-hero::before{
  content:'';position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  opacity:0.13;pointer-events:none;
}
.hero-inner{position:relative;z-index:2;display:flex;align-items:center;gap:44px;flex-wrap:wrap;}
.hero-content{flex:1 1 360px;}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(42,110,166,0.09);
  border:1px solid rgba(42,110,166,0.16);
  color:var(--color-primary);
  font-size:13px;font-weight:600;
  padding:4px 14px;border-radius:30px;
  margin-bottom:18px;
}
.hero-kicker i{font-size:12px;}
.hero-content h1{
  font-size:38px;line-height:1.2;font-weight:800;color:var(--color-text-main);
  letter-spacing:-0.5px;margin-bottom:18px;
}
.hero-content h1 em{font-style:normal;color:var(--color-primary);}
.hero-content .lead{
  font-size:16px;color:var(--color-text-secondary);line-height:1.85;margin-bottom:24px;max-width:570px;
}
.hero-image{flex:0 1 340px;}
.hero-image img{
  width:100%;height:auto;border-radius:14px;
  border:1px solid var(--color-border-light);
  box-shadow:var(--shadow-card);
  object-fit:cover;
}
.hero-anchors{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:8px;
}
.anchor-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:500;color:var(--color-primary);
  background:var(--color-surface);
  border:1px solid var(--color-border);
  padding:7px 16px;border-radius:40px;
  transition:all .2s;
}
.anchor-link:hover{border-color:var(--color-primary);background:var(--color-primary-soft);color:#1f5b8c;}
.anchor-link i{font-size:12px;}

/* 通用板块 */
.section-block{margin-bottom:44px;}
.section-header{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:26px;flex-wrap:wrap;}
.section-title-wrap{max-width:680px;}
.section-tag{font-size:12px;font-weight:700;letter-spacing:1.5px;color:var(--color-accent);text-transform:uppercase;margin-bottom:6px;display:block;}
.section-title-wrap h2{font-size:30px;line-height:1.25;font-weight:700;color:var(--color-text-main);margin-bottom:8px;letter-spacing:-0.3px;}
.section-title-wrap p{font-size:15px;color:var(--color-text-secondary);line-height:1.7;}
.section-link{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;padding:8px 0;border-bottom:1px dashed transparent;transition:border-color .2s;}
.section-link:hover{border-bottom-color:var(--color-primary);}
.section-link i{font-size:12px;}

/* 数据卡 / 图标内容 */
.feature-grid{
  display:grid;grid-template-columns:repeat(6,1fr);gap:20px;
}
.feature-card{
  background:var(--color-surface);
  border-radius:var(--radius-card);
  padding:24px 20px;
  box-shadow:var(--shadow-card);
  border:1px solid transparent;
  transition:transform .2s,box-shadow .2s,border-color .2s;
  position:relative;
  grid-column:span 2;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--color-border-light);}
.feature-card:nth-child(4),.feature-card:nth-child(5),.feature-card:nth-child(6){grid-column:span 2;}
.feature-icon{
  width:44px;height:44px;border-radius:10px;
  background:var(--color-primary-soft);
  color:var(--color-primary);
  display:flex;align-items:center;justify-content:center;
  font-size:20px;margin-bottom:16px;
}
.feature-card-wide{grid-column:span 3 !important;}
.feature-card h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--color-text-main);}
.feature-card p{font-size:14px;color:var(--color-text-secondary);line-height:1.7;}

/* 图文模块 */
.split-block{
  display:grid;grid-template-columns:0.92fr 1.08fr;gap:40px;align-items:center;
  background:var(--color-surface);
  border-radius:16px;
  padding:36px;
  box-shadow:var(--shadow-card);
  margin-bottom:28px;
  border:1px solid var(--color-border-light);
}
.split-image img{border-radius:12px;border:1px solid var(--color-border-light);box-shadow:var(--shadow-card);width:100%;height:auto;}
.split-copy .chip{
  display:inline-block;background:var(--color-primary-soft);color:var(--color-primary);
  font-size:12px;font-weight:700;letter-spacing:0.5px;
  padding:3px 14px;border-radius:30px;margin-bottom:14px;
}
.split-copy h3{font-size:23px;font-weight:700;margin-bottom:14px;line-height:1.35;}
.split-copy p{font-size:15px;color:var(--color-text-secondary);line-height:1.8;margin-bottom:14px;}
.split-copy ul{margin-top:10px;}
.split-copy ul li{
  display:flex;gap:12px;font-size:14px;color:var(--color-text-secondary);
  padding:7px 0;line-height:1.6;align-items:flex-start;
}
.split-copy ul li i{
  color:var(--color-primary);font-size:12px;background:var(--color-primary-soft);
  width:20px;height:20px;flex:0 0 20px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;margin-top:5px;
}

/* 时间线 */
.timeline-wrap{padding:8px 0 4px;}
.timeline-list{display:flex;flex-direction:column;gap:0;max-width:760px;margin:0 auto;}
.timeline-item{
  position:relative;
  padding:0 0 30px 34px;
  border-left:2px solid var(--color-border-light);
}
.timeline-item:last-child{border-left-color:transparent;padding-bottom:4px;}
.timeline-dot{
  position:absolute;left:-9px;top:6px;
  width:16px;height:16px;border-radius:50%;
  background:var(--color-primary);
  border:3px solid var(--color-primary-soft);
}
.timeline-item .time-badge{
  font-size:13px;font-weight:600;color:var(--color-primary);
  background:var(--color-primary-soft);
  padding:2px 12px;border-radius:20px;
}
.timeline-item h3{font-size:17px;font-weight:700;margin:8px 0 6px;color:var(--color-text-main);}
.timeline-item p{font-size:14px;color:var(--color-text-secondary);line-height:1.7;max-width:640px;}

/* 卡片两列 */
.two-col-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.content-card{
  display:flex;gap:22px;align-items:stretch;
  background:var(--color-surface);
  border:1px solid var(--color-border-light);
  border-radius:var(--radius-card);
  padding:20px;
  box-shadow:var(--shadow-card);
  transition:all .25s ease;
}
.content-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:var(--color-border);}
.content-card-img{flex:0 0 132px;width:132px;border-radius:10px;overflow:hidden;min-height:112px;background:var(--color-surface-muted);}
.content-card-img img{width:100%;height:100%;object-fit:cover;}
.content-card-body{padding-top:2px;}
.content-card-body h3{font-size:16px;font-weight:700;color:var(--color-text-main);line-height:1.5;margin-bottom:6px;}
.content-card-body p{font-size:13px;color:var(--color-text-secondary);line-height:1.65;margin-bottom:6px;}
.content-card-meta{display:flex;flex-wrap:wrap;gap:12px;font-size:12px;color:var(--color-text-tertiary);margin-bottom:8px;align-items:center;}
.tag{display:inline-block;font-size:11px;font-weight:600;background:var(--color-primary-soft);color:var(--color-primary);padding:1px 10px;border-radius:20px;letter-spacing:0.4px;}
.content-card-right{display:flex;flex-direction:column;align-items:flex-end;justify-content:center;gap:6px;flex-shrink:0;padding-left:8px;}
.text-link{font-size:13px;font-weight:600;color:var(--color-primary);display:inline-flex;align-items:center;gap:4px;}
.text-link i{font-size:11px;}
.date-label{font-size:12px;color:var(--color-text-tertiary);white-space:nowrap;}

/* 空状态 */
.empty-state{
  border:1px dashed var(--color-border);
  border-radius:var(--radius-card);
  background:var(--color-surface);
  padding:28px 20px;
  text-align:center;
  color:var(--color-text-tertiary);
}
.empty-state i{font-size:28px;display:block;margin-bottom:8px;color:var(--color-border);}
.empty-state p{font-size:14px;}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:0.9fr 1.1fr;gap:28px;}
.faq-heading h2{font-size:28px;margin-bottom:14px;line-height:1.3;}
.faq-heading p{color:var(--color-text-secondary);font-size:15px;line-height:1.8;}
.faq-accordion{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:12px;
  overflow:hidden;
  transition:box-shadow .2s;
}
.faq-item:hover{box-shadow:var(--shadow-card);}
.faq-question{
  width:100%;display:flex;justify-content:space-between;align-items:center;
  padding:17px 20px;min-height:52px;text-align:left;
  font-size:15px;font-weight:600;color:var(--color-text-main);
  background:#fff;transition:background .15s;
}
.faq-question:hover{background:#fafcfe;}
.faq-question .faq-icon{color:var(--color-primary);transition:transform .3s;width:18px;text-align:center;flex-shrink:0;}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease;}
.faq-answer p{padding:0 20px 18px;margin-top:0;font-size:14px;color:var(--color-text-secondary);line-height:1.8;border-top:1px solid var(--color-border-light);padding-top:14px;}
.faq-item.open .faq-answer{max-height:280px;}

/* CTA */
.cta-panel{
  background:linear-gradient(135deg,#fff,var(--color-primary-soft));
  border-radius:18px;
  padding:48px 44px;
  box-shadow:var(--shadow-card);
  border:1px solid var(--color-border-light);
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  position:relative;
  overflow:hidden;
  margin-top:12px;
}
.cta-panel::after{
  content:'';position:absolute;bottom:-84px;right:-60px;
  width:240px;height:240px;border-radius:50%;
  background:rgba(42,110,166,0.06);
}
.cta-panel h2{font-size:28px;line-height:1.35;margin-bottom:12px;position:relative;z-index:2;}
.cta-panel p{color:var(--color-text-secondary);max-width:560px;margin-bottom:26px;position:relative;z-index:2;font-size:15px;}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;position:relative;z-index:2;}
.btn-primary{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--color-primary);
  height:46px;padding:0 30px;
  border-radius:var(--radius-control);
  font-size:15px;font-weight:600;
  color:#fff;border:1px solid rgba(42,110,166,0.6);
  transition:all .2s ease;
  box-shadow:0 6px 16px rgba(42,110,166,0.16);
}
.btn-primary:hover{background:#1f5b8c;transform:translateY(-1px);box-shadow:0 10px 22px rgba(42,110,166,0.22);color:#fff;border-color:#1f5b8c;}
.btn-primary:focus-visible{outline:3px solid rgba(42,110,166,0.4);outline-offset:3px;}
.btn-secondary{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--color-surface);
  height:45px;padding:0 28px;
  border-radius:var(--radius-control);
  font-size:15px;font-weight:600;
  color:var(--color-primary);
  border:1px solid var(--color-border);
  transition:all .2s;
}
.btn-secondary:hover{border-color:var(--color-primary);background:var(--color-primary-soft);color:#1f5b8c;}

/* 页脚 */
.site-footer{
  background:var(--color-surface);
  border-top:1px solid var(--color-border-light);
  margin-top:18px;
}
.footer-wrapper{max-width:1160px;margin:0 auto;padding:44px 40px 24px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:34px;margin-bottom:34px;}
.footer-brand .brand-wrap{padding:0;margin-bottom:12px;}
.footer-brand .brand-logo-square{width:34px;height:34px;font-size:17px;border-radius:9px;}
.footer-brand .brand-text{font-size:20px;}
.footer-desc{font-size:14px;color:var(--color-text-secondary);line-height:1.8;margin-top:12px;max-width:280px;}
.footer-heading{font-size:14px;color:var(--color-text-main);margin-bottom:12px;letter-spacing:0.3px;}
.footer-links li,.footer-info-list li{margin-bottom:9px;}
.footer-links a{font-size:14px;color:var(--color-text-secondary);}
.footer-links a:hover{color:var(--color-primary);}
.footer-info-list li{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--color-text-secondary);}
.footer-status-dot{width:6px;height:6px;background:var(--color-success);border-radius:50%;display:inline-block;}
.footer-copyright{border-top:1px solid var(--color-border-light);padding-top:20px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;font-size:13px;color:var(--color-text-tertiary);}
.footer-copyright-links{display:flex;gap:16px;}
.back-home-bar{display:flex;justify-content:center;padding:8px 0 0;}
.btn-back-home{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 24px;border-radius:40px;
  background:var(--color-bg-canvas);
  border:1px solid var(--color-border);
  color:var(--color-primary);
  font-weight:600;font-size:14px;
  transition:all .2s;
}
.btn-back-home:hover{background:var(--color-primary-soft);border-color:var(--color-primary);}

/* 响应式 */
@media (min-width:1200px){
  .feature-grid{grid-template-columns:repeat(6,1fr);}
  .content-card-img{flex-basis:120px;width:120px;}
}
@media (max-width:1180px){
  .split-block{grid-template-columns:1fr 0.9fr;gap:28px;padding:28px;}
}
@media (max-width:1100px){
  .app-sidebar{display:none;}
  .main-content{margin-left:0;}
  .mobile-topbar{display:flex;}
  .content-container{padding:32px 24px 50px;}
  .footer-wrapper{padding:36px 24px 20px;}
  .category-hero{padding:32px 26px;}
}
@media (max-width:900px){
  .split-block{grid-template-columns:1fr;}
  .feature-card,.feature-card:nth-child(4),.feature-card:nth-child(5),.feature-card:nth-child(6){grid-column:span 3;}
  .faq-grid{grid-template-columns:1fr;}
  .two-col-grid{grid-template-columns:1fr;}
  .content-card{flex-wrap:wrap;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:640px){
  .content-container{padding:24px 16px 40px;}
  .category-hero{padding:28px 20px;}
  .category-hero h1{font-size:28px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-copyright{flex-direction:column;align-items:flex-start;}
  .hero-content h1{font-size:29px;}
  .content-card{flex-direction:column;}
  .content-card-img{width:100%;flex-basis:auto;}
  .content-card-right{align-items:flex-start;}
}
@media (max-width:440px){
  .section-title-wrap h2{font-size:24px;}
  .split-block{padding:22px 16px;}
  .feature-card,.feature-card:nth-child(4),.feature-card:nth-child(5),.feature-card:nth-child(6){grid-column:span 6;}
  .hero-image{flex-basis:100%;}
}

/* roulang page: category3 */
:root {
  --color-bg-canvas: #F4F8FC;
  --color-surface: #FFFFFF;
  --color-surface-muted: #ECF2F8;
  --color-primary: #2A6EA6;
  --color-primary-soft: #E7F0F8;
  --color-accent: #D18A2A;
  --color-text-main: #243949;
  --color-text-secondary: #5C7285;
  --color-text-tertiary: #93A7B8;
  --color-border: #DCE6EF;
  --color-border-light: #EAF1F7;
  --color-success: #368B6B;
  --color-warning: #B47D2E;
  --color-error: #BC4A4A;
  --shadow-card: 0 1px 2px rgba(33,61,84,0.05), 0 6px 18px rgba(33,61,84,0.06);
  --shadow-hover: 0 2px 4px rgba(33,61,84,0.06), 0 16px 32px rgba(33,61,84,0.10);
  --radius-xl: 20px;
  --radius-lg: 12px;
  --radius-md: 8px;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-stack);
  background: var(--color-bg-canvas);
  color: var(--color-text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
body.nav-open { overflow: hidden; }
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
ul, ol, p, h1, h2, h3, h4, figure { margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid rgba(42,110,166,.35); outline-offset: 2px; }

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 3000;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 20px;
  border-radius: 0 0 10px 10px;
  transition: top .25s ease;
}
.skip-link:focus { top: 0; }

.app-shell { min-height: 100vh; }

.site-sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 248px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  z-index: 1200;
  transform: translateX(0);
  transition: transform .3s ease, box-shadow .3s ease;
  box-shadow: none;
}
.sidebar-inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 20px 14px 16px;
}
.sidebar-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}
.sidebar-scroll::-webkit-scrollbar { width: 6px; }
.sidebar-scroll::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 8px; }

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 12px 18px;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 18px;
  color: var(--color-text-main);
}
.brand-wrap:hover { color: var(--color-text-main); }
.brand-logo-square {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--color-primary);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  box-shadow: 0 4px 12px rgba(42,110,166,.18);
}
.brand-text {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.2;
}

.nav-items {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.nav-items + .nav-group { margin-top: 24px; }
.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 16px;
  border-radius: var(--radius-md);
  color: var(--color-text-main);
  font-size: 15px;
  font-weight: 400;
  transition: background .2s ease, color .2s ease;
}
.nav-item .nav-icon {
  width: 20px;
  flex: 0 0 20px;
  display: inline-flex;
  color: var(--color-text-tertiary);
  font-size: 17px;
  line-height: 1;
  transition: color .2s ease;
}
.nav-item:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.nav-item:hover .nav-icon { color: var(--color-primary); }
.nav-item:active { transform: translateY(1px); }
.nav-item.active {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 700;
}
.nav-item.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  border-radius: 0 3px 3px 0;
  background: var(--color-primary);
}
.nav-item.active .nav-icon { color: var(--color-primary); }

.nav-group {
  padding-top: 2px;
  margin-top: 22px;
  border-top: 1px solid var(--color-border-light);
}
.nav-group-title {
  display: block;
  padding: 14px 16px 8px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--color-text-tertiary);
  font-weight: 600;
}

.sidebar-foot {
  padding: 14px 14px 4px;
  margin-top: 12px;
  border-top: 1px solid var(--color-border-light);
  font-size: 13px;
  color: var(--color-text-secondary);
}
.sidebar-foot .footer-status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  margin-right: 7px;
  vertical-align: 1px;
}
.sidebar-foot p { margin-top: 6px; color: var(--color-text-tertiary); font-size: 12px; line-height: 1.6; }

.sidebar-overlay {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background: rgba(26, 46, 62, 0.38);
  border: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease;
}

.mobile-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 1050;
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 6px rgba(33,61,84,.03);
}
.topbar-brand { display: inline-flex; align-items: center; gap: 10px; }
.topbar-burger {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
  padding: 0;
  transition: border-color .2s ease, background .2s ease;
}
.topbar-burger span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text-main);
  transition: background .2s ease;
}
.topbar-burger:hover { background: var(--color-primary-soft); border-color: var(--color-primary); }
.topbar-burger:hover span { background: var(--color-primary); }
.topbar-burger:active { transform: translateY(1px); }

.main-area {
  margin-left: 248px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg-canvas);
}
.main-content {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 44px 42px 68px;
  flex: 1;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 26px;
}
.breadcrumb a { color: var(--color-text-secondary); transition: color .2s ease; }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb-sep { color: var(--color-text-tertiary); }

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
  align-items: center;
  gap: 52px;
}
.hero-copy { max-width: 620px; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 40px;
  margin-bottom: 18px;
}
.hero-kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}
.hero-section h1 {
  font-size: 40px;
  line-height: 1.24;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}
.hero-lead {
  font-size: 17px;
  color: var(--color-text-secondary);
  line-height: 1.85;
  max-width: 56ch;
  margin-bottom: 28px;
}
.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 26px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(42,110,166,.18);
}
.btn-primary:hover {
  background: #1f5d92;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(42,110,166,.24);
}
.btn-primary:active { transform: translateY(1px) scale(.99); }
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.btn-secondary:active { transform: translateY(1px); }

.hero-facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-facts li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  box-shadow: 0 1px 3px rgba(33,61,84,.04);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  color: var(--color-text-secondary);
}
.fact-mark {
  color: var(--color-primary);
  font-weight: 600;
}

.hero-media {
  margin: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-card);
}
.hero-media img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}
.hero-media figcaption {
  padding: 14px 18px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
}

.section-block { padding: 64px 0 8px; }
.section-block + .section-block { border-top: 1px dashed var(--color-border); margin-top: 64px; }
.section-heading { max-width: 720px; margin-bottom: 38px; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: .1em;
  background: var(--color-primary-soft);
  padding: 5px 12px;
  border-radius: 40px;
  margin-bottom: 14px;
}
.section-heading h2 {
  font-size: 28px;
  line-height: 1.35;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.section-heading p {
  color: var(--color-text-secondary);
  font-size: 16px;
  line-height: 1.85;
}
.grid-card-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 24px;
}
.component-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: 16px;
  padding: 26px 24px;
  box-shadow: var(--shadow-card);
  transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease;
}
.component-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(42,110,166,.18);
}
.mode-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 18px;
}
.component-card h3 {
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 8px;
  font-weight: 700;
}
.component-card p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.process-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  padding: 48px;
  margin-top: 64px;
}
.process-layout {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  gap: 48px;
  align-items: center;
}
.process-intro h2 {
  font-size: 28px;
  line-height: 1.35;
  margin-bottom: 12px;
}
.process-intro p {
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.9;
}
.process-track {
  display: flex;
  flex-direction: column;
}
.process-step {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border-light);
}
.process-step:last-child { border-bottom: 0; padding-bottom: 0; }
.step-num {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-primary);
  opacity: .4;
  line-height: 1.2;
}
.step-body h3 { font-size: 17px; margin-bottom: 4px; }
.step-body p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.7; }

.scope-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, .92fr);
  gap: 44px;
  align-items: center;
  margin-top: 38px;
}
.scope-list { list-style: none; }
.scope-list li {
  position: relative;
  padding: 14px 0 14px 42px;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-main);
}
.scope-list li:last-child { border-bottom: 0; }
.scope-list li::before {
  content: "✓";
  position: absolute;
  left: 6px;
  top: 16px;
  width: 24px;
  height: 24px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.scope-note {
  margin-top: 22px;
  background: var(--color-surface-muted);
  border-radius: 14px;
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}
.figure-frame {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-card);
}
.figure-frame img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}
.figure-frame figcaption {
  padding: 14px 18px;
  font-size: 13px;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
}

.faq-wrap {
  display: grid;
  grid-template-columns: minmax(0, .75fr) minmax(0, 1.25fr);
  gap: 48px;
  align-items: start;
  margin-top: 38px;
}
.faq-side p {
  color: var(--color-text-secondary);
  line-height: 1.85;
  margin-bottom: 22px;
}
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item.open { border-color: rgba(42,110,166,.26); box-shadow: var(--shadow-card); }
.faq-toggle {
  width: 100%;
  min-height: 56px;
  background: transparent;
  border: 0;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  color: var(--color-text-main);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  transition: color .2s ease, background .2s ease;
}
.faq-toggle:hover { color: var(--color-primary); }
.faq-list .faq-toggle:active { background: var(--color-primary-soft); }
.faq-toggle .faq-arrow {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 600;
  transition: transform .25s ease, background .25s ease;
}
.faq-item.open .faq-arrow { background: var(--color-primary); color: #fff; transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .28s ease;
}
.faq-item.open .faq-answer { max-height: 320px; }
.faq-answer-inner {
  padding: 4px 20px 18px 20px;
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.8;
  border-top: 1px dashed var(--color-border-light);
  margin-top: 0;
  padding-top: 14px;
}

.cta-panel {
  margin-top: 64px;
  background: var(--color-primary-soft);
  border: 1px solid rgba(42,110,166,.14);
  border-radius: 24px;
  padding: 44px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.cta-copy h2 {
  font-size: 24px;
  line-height: 1.4;
  margin-bottom: 8px;
  font-weight: 700;
}
.cta-copy p {
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  flex: 0 0 auto;
}
.cta-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 10px 6px;
  transition: color .2s ease;
}
.cta-link:hover { color: #1f5d92; }

.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}
.footer-wrapper {
  max-width: 1160px;
  margin: 0 auto;
  padding: 52px 42px 26px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr .8fr 1fr;
  gap: 36px;
  margin-bottom: 34px;
}
.footer-brand .brand-wrap { padding: 0 0 12px; border-bottom: 0; margin-bottom: 8px; }
.footer-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
}
.footer-links, .footer-info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.footer-links a {
  color: var(--color-text-secondary);
  font-size: 14px;
  transition: color .2s ease;
}
.footer-links a:hover { color: var(--color-primary); }
.footer-info-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-secondary);
  font-size: 14px;
}
.footer-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  flex: 0 0 auto;
}
.footer-copyright {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 20px;
  border-top: 1px solid var(--color-border-light);
  padding-top: 20px;
  color: var(--color-text-tertiary);
  font-size: 13px;
}
.footer-copyright-links { display: inline-flex; gap: 14px; color: var(--color-text-tertiary); }
.footer-copyright a { color: var(--color-text-tertiary); }
.footer-copyright a:hover { color: var(--color-primary); }

@media (max-width: 1199px) {
  .main-content { padding: 44px 32px 60px; }
  .hero-section { gap: 36px; }
  .grid-card-list { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .process-layout { grid-template-columns: 1fr; gap: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 1099px) {
  .site-sidebar {
    transform: translateX(-105%);
    box-shadow: 0 24px 70px rgba(21, 54, 80, .22);
  }
  body.nav-open .site-sidebar { transform: translateX(0); }
  body.nav-open .sidebar-overlay { opacity: 1; pointer-events: auto; }
  .sidebar-overlay {
    display: block;
    opacity: 0;
    pointer-events: none;
  }
  .mobile-topbar { display: flex; }
  .main-area { margin-left: 0; }
  .main-content { padding-top: 96px; }
  body.nav-open { overflow: hidden; }
}
@media (max-width: 900px) {
  .hero-section { grid-template-columns: 1fr; gap: 32px; }
  .hero-media img { height: auto; max-height: 360px; object-fit: cover; }
  .grid-card-list { grid-template-columns: 1fr; }
  .scope-grid { grid-template-columns: 1fr; }
  .faq-wrap { grid-template-columns: 1fr; }
  .cta-panel { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .process-section { padding: 34px 26px; }
  .hero-section h1 { font-size: 34px; }
  .section-heading h2 { font-size: 25px; }
}
@media (max-width: 600px) {
  .main-content { padding: 84px 18px 48px; }
  .footer-wrapper { padding: 42px 18px 24px; }
  .section-block { padding: 48px 0 4px; }
  .section-block + .section-block { margin-top: 48px; }
  .hero-section h1 { font-size: 30px; }
  .hero-actions .btn-primary, .hero-actions .btn-secondary { width: 100%; }
  .hero-facts li { width: 100%; }
  .process-step { grid-template-columns: 42px minmax(0,1fr); gap: 12px; }
  .step-num { font-size: 21px; }
  .figure-frame img { height: auto; }
  .cta-panel { padding: 32px 22px; }
  .cta-actions { width: 100%; }
  .cta-actions .btn-primary, .cta-actions .btn-secondary { width: 100%; }
  .footer-copyright { flex-direction: column; align-items: flex-start; gap: 8px; }
}