/* roulang page: index */
:root {
  --bg:#0B0F14;
  --panel:#111720;
  --card:#161E27;
  --input-bg:#0F151C;
  --text-primary:#F2F5F7;
  --text-secondary:#A6B0B9;
  --text-muted:#7C8790;
  --brand:#F5A64C;
  --brand-hover:#FFC274;
  --brand-border:rgba(245,166,76,.45);
  --success:#34D399;
  --danger:#F87171;
  --border:rgba(255,255,255,.08);
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --radius-tag:6px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --shadow-hover:0 18px 44px rgba(0,0,0,.45);
  --transition:cubic-bezier(.25,.8,.25,1);
  --font-serif:"Source Han Serif SC","Noto Serif CJK SC","Songti SC",serif;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text-primary);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 32px;width:100%}
.section{padding:96px 0}
.section-head{margin-bottom:48px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--brand);font-weight:600;
}
.eyebrow::before{content:'';width:24px;height:2px;background:var(--brand);border-radius:2px}
h1,h2,h3{font-family:var(--font-serif);line-height:1.25;font-weight:700}
h2{font-size:clamp(26px,4vw,40px);margin-bottom:16px}
h3{font-size:20px;font-weight:600}
p{color:var(--text-secondary)}
.numeric{font-variant-numeric:tabular-nums}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:all .25s var(--transition);
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand);color:var(--bg);
}
.btn-primary:hover{
  background:var(--brand-hover);
  box-shadow:0 0 24px rgba(245,166,76,.25);
  transform:translateY(-1px);
}
.btn-secondary{
  background:transparent;border:1px solid rgba(255,255,255,.2);color:var(--text-primary);
}
.btn-secondary:hover{
  border-color:var(--brand-border);background:rgba(245,166,76,.08);
}
.btn-sm{height:40px;padding:0 20px;font-size:13px}
.btn-block{width:100%}

/* ===== Tags & Badges ===== */
.tag{
  display:inline-flex;align-items:center;
  background:rgba(245,166,76,.12);color:var(--brand);
  font-size:12px;font-weight:500;padding:4px 10px;border-radius:var(--radius-tag);
  letter-spacing:.02em;
}
.tag-success{background:rgba(52,211,153,.12);color:var(--success)}
.tag-warning{background:rgba(248,113,113,.12);color:var(--danger)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;color:var(--text-secondary);
  background:var(--card);border:1px solid var(--border);
  padding:4px 12px;border-radius:20px;
}
.badge .dot{width:6px;height:6px;border-radius:50%;background:var(--success);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}

/* ===== Header & Nav ===== */
.site-header{
  position:sticky;top:12px;z-index:100;
  padding:0 16px;margin:16px auto 0;max-width:1248px;
}
.nav-wrap{
  display:flex;align-items:center;gap:24px;
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:12px 20px;
  box-shadow:var(--shadow);
  backdrop-filter:blur(12px);
  background:rgba(17,23,32,.95);
  transition:box-shadow .3s var(--transition);
}
.site-header.is-scrolled .nav-wrap{
  box-shadow:0 14px 36px rgba(0,0,0,.5);
}
.brand{
  display:flex;align-items:center;gap:8px;
  flex-shrink:0;
}
.brand-mark{
  font-family:var(--font-serif);
  font-size:20px;font-weight:700;color:var(--brand);
  letter-spacing:.02em;
}
.brand-divider{width:1px;height:20px;background:rgba(255,255,255,.2)}
.brand-text{
  font-size:15px;font-weight:600;color:var(--text-primary);
  letter-spacing:.02em;
}
.nav-panel{
  display:flex;align-items:center;gap:8px;
  margin-left:auto;
}
.nav-item{
  display:flex;align-items:center;gap:8px;
  min-width:96px;height:44px;
  padding:0 16px;
  border-radius:var(--radius-sm);
  position:relative;
  color:var(--text-secondary);
  font-size:13px;font-weight:500;
  transition:all .25s var(--transition);
}
.nav-item svg{width:20px;height:20px;stroke:currentColor;stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.nav-item:hover{
  background:rgba(255,255,255,.06);
  color:var(--brand);
}
.nav-item.active{
  background:rgba(245,166,76,.12);
  color:var(--brand);
}
.nav-item.active::after{
  content:'';position:absolute;bottom:6px;left:50%;transform:translateX(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--brand);
}
.nav-actions{
  display:flex;align-items:center;gap:16px;
  flex-shrink:0;
}
.nav-status{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;color:var(--text-secondary);
}
.nav-status .dot{width:6px;height:6px;border-radius:50%;background:var(--success);animation:pulse 2s infinite}
.nav-toggle{
  display:none;width:44px;height:44px;
  border-radius:var(--radius-sm);
  align-items:center;justify-content:center;
  border:1px solid var(--border);
  transition:all .25s var(--transition);
}
.nav-toggle:hover{border-color:var(--brand-border);background:rgba(245,166,76,.08)}
.nav-toggle svg{width:22px;height:22px;stroke:var(--text-primary);stroke-width:1.5;fill:none;stroke-linecap:round}

.mobile-drawer{
  position:fixed;top:0;right:-320px;width:300px;height:100vh;
  background:var(--panel);z-index:200;
  border-left:1px solid var(--border);
  transition:right .35s var(--transition);
  padding:24px;
  display:flex;flex-direction:column;gap:8px;
  box-shadow:-20px 0 60px rgba(0,0,0,.5);
}
.mobile-drawer.open{right:0}
.drawer-brand{
  display:flex;align-items:center;gap:8px;
  padding:8px 0 20px;border-bottom:1px solid var(--border);margin-bottom:16px;
}
.drawer-brand .brand-mark{font-size:18px}
.drawer-nav-item{
  display:flex;align-items:center;gap:12px;
  padding:14px 16px;border-radius:var(--radius-sm);
  color:var(--text-secondary);font-size:14px;font-weight:500;
  transition:all .25s var(--transition);
}
.drawer-nav-item svg{width:20px;height:20px;stroke:currentColor;stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round}
.drawer-nav-item:hover{background:rgba(255,255,255,.06);color:var(--brand)}
.drawer-nav-item.active{background:rgba(245,166,76,.12);color:var(--brand)}
.drawer-close{
  margin-top:auto;display:flex;align-items:center;justify-content:center;gap:8px;
  height:44px;border-radius:var(--radius-sm);
  border:1px solid var(--border);color:var(--text-secondary);
  font-size:14px;transition:all .25s var(--transition);
}
.drawer-close:hover{border-color:var(--brand-border);color:var(--brand)}
.drawer-overlay{
  position:fixed;top:0;left:0;width:100%;height:100%;
  background:rgba(0,0,0,.6);z-index:199;
  opacity:0;visibility:hidden;transition:all .3s ease;
}
.drawer-overlay.show{opacity:1;visibility:visible}

/* ===== Hero ===== */
.hero{
  position:relative;
  padding:120px 0 96px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;z-index:-1;
  background-image:
    linear-gradient(to bottom,rgba(11,15,20,.82),#0B0F14 100%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
}
.hero-bg::after{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:40px 40px;
}
.hero-inner{
  display:grid;grid-template-columns:1fr 420px;gap:64px;align-items:center;
}
.hero-content{
  animation:fadeUp .6s var(--transition) both;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--brand);
  font-weight:600;margin-bottom:20px;
  padding:6px 14px;border-radius:20px;
  background:rgba(245,166,76,.08);
  border:1px solid rgba(245,166,76,.2);
}
.hero-eyebrow::before{content:'';width:18px;height:2px;background:var(--brand);border-radius:2px}
.hero-title{
  font-size:clamp(36px,8vw,60px);
  line-height:1.15;
  margin-bottom:24px;
  letter-spacing:.01em;
}
.hero-title .accent{
  color:var(--brand);
}
.hero-subtitle{
  font-size:17px;line-height:1.8;
  color:var(--text-secondary);
  max-width:520px;
  margin-bottom:36px;
}
.hero-actions{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
}
.hero-panel{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:28px;
  box-shadow:var(--shadow);
  animation:fadeUp .6s var(--transition) .2s both;
}
.panel-head{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:24px;
}
.panel-label{
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--text-primary);
}
.entry-list{
  display:flex;flex-direction:column;gap:8px;
}
.entry-item{
  display:flex;align-items:center;gap:16px;
  padding:16px;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  transition:all .25s var(--transition);
}
.entry-item:hover{
  background:rgba(245,166,76,.08);
  border-color:var(--brand-border);
}
.entry-item svg{
  width:22px;height:22px;stroke:var(--brand);
  stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;
  flex-shrink:0;
}
.entry-info{display:flex;flex-direction:column;gap:2px;flex:1}
.entry-name{font-size:15px;font-weight:600;color:var(--text-primary)}
.entry-desc{font-size:13px;color:var(--text-muted)}
.entry-arrow{
  width:18px;height:18px;stroke:var(--text-muted);
  stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;
  transition:all .25s var(--transition);
}
.entry-item:hover .entry-arrow{
  stroke:var(--brand);transform:translateX(4px);
}
.panel-status{
  display:flex;align-items:center;gap:8px;
  margin-top:20px;padding-top:16px;
  border-top:1px solid var(--border);
  font-size:13px;color:var(--text-muted);
}
.panel-status .dot{
  width:8px;height:8px;border-radius:50%;background:var(--success);
  box-shadow:0 0 8px rgba(52,211,153,.4);
}
@keyframes fadeUp{
  from{opacity:0;transform:translateY(16px)}
  to{opacity:1;transform:translateY(0)}
}

/* ===== Service ===== */
.service-section{background:var(--bg)}
.service-layout{
  display:grid;grid-template-columns:4fr 8fr;gap:64px;
}
.service-left{
  display:flex;flex-direction:column;gap:20px;
}
.service-left .btn{align-self:flex-start}
.service-list{
  display:flex;flex-direction:column;
  border-top:1px solid var(--border);
}
.service-item{
  display:flex;align-items:center;gap:24px;
  padding:28px 16px;
  border-bottom:1px solid var(--border);
  transition:all .3s var(--transition);
  position:relative;
}
.service-item:hover{
  transform:translateX(4px);
  background:rgba(255,255,255,.02);
}
.service-item:hover .service-num,
.service-item:hover .service-arrow{
  color:var(--brand);stroke:var(--brand);
}
.service-num{
  font-family:var(--font-serif);
  font-size:24px;font-weight:700;color:var(--text-muted);
  font-variant-numeric:tabular-nums;
  min-width:52px;
  transition:color .3s var(--transition);
}
.service-info{flex:1}
.service-name{
  font-size:17px;font-weight:600;color:var(--text-primary);
  margin-bottom:4px;
}
.service-desc{
  font-size:14px;color:var(--text-muted);
  line-height:1.6;
}
.service-arrow{
  width:20px;height:20px;stroke:var(--text-muted);
  stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;
  transition:all .3s var(--transition);
}

/* ===== Metrics ===== */
.metrics-section{
  background:var(--panel);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  padding:64px 0;
}
.metrics-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:32px;
}
.metric-card{
  padding:8px 0;
}
.metric-card .top-line{
  width:100%;height:2px;background:var(--brand);
  margin-bottom:24px;border-radius:2px;
  opacity:.6;
}
.metric-value{
  font-size:42px;font-weight:700;color:var(--brand);
  font-family:var(--font-sans);
  font-variant-numeric:tabular-nums;
  line-height:1.1;margin-bottom:8px;
}
.metric-label{
  font-size:13px;color:var(--text-secondary);
  letter-spacing:.02em;
}

/* ===== Cases ===== */
.cases-section{background:var(--bg)}
.case-card{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  margin-bottom:64px;
}
.case-card:last-child{margin-bottom:0}
.case-card.reverse .case-media{order:2}
.case-card.reverse .case-content{order:1}
.case-media{
  border-radius:16px;overflow:hidden;
  position:relative;
  aspect-ratio:16/10;
  box-shadow:var(--shadow);
}
.case-media img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .5s var(--transition);
}
.case-media:hover img{transform:scale(1.03)}
.case-media::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(to top,rgba(11,15,20,.3),transparent 40%);
  pointer-events:none;
}
.case-content{
  padding:8px 0;
}
.case-tag{
  display:inline-block;
  background:rgba(245,166,76,.12);color:var(--brand);
  font-size:12px;font-weight:500;padding:4px 10px;border-radius:var(--radius-tag);
  margin-bottom:16px;letter-spacing:.02em;
}
.case-title{
  font-size:22px;font-weight:700;
  margin-bottom:12px;color:var(--text-primary);
}
.case-text{
  font-size:15px;line-height:1.7;color:var(--text-secondary);
  margin-bottom:20px;
}
.case-result{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--text-primary);
  padding:12px 16px;
  background:var(--card);
  border-radius:var(--radius-sm);
  border:1px solid var(--border);
}
.case-result svg{
  width:18px;height:18px;stroke:var(--success);
  stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;
}

/* ===== Solution ===== */
.solution-section{
  background:var(--panel);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.solution-section .container{position:relative}
.steps-row{
  display:grid;grid-template-columns:repeat(3,1fr);gap:40px;
  position:relative;
}
.steps-row::before{
  content:'';position:absolute;top:32px;left:12%;right:12%;
  height:1px;background:rgba(255,255,255,.1);
}
.step-item{
  position:relative;
  padding:0 8px;
}
.step-top{
  display:flex;align-items:center;gap:16px;margin-bottom:20px;
}
.step-num{
  font-size:13px;font-weight:700;color:var(--brand);
  letter-spacing:.08em;
  background:rgba(245,166,76,.12);
  padding:6px 12px;border-radius:var(--radius-tag);
}
.step-icon{
  width:64px;height:64px;
  border-radius:16px;
  background:var(--card);
  border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
}
.step-icon svg{
  width:28px;height:28px;stroke:var(--brand);
  stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;
}
.step-title{
  font-size:18px;font-weight:600;color:var(--text-primary);
  margin-bottom:8px;
}
.step-desc{
  font-size:14px;color:var(--text-muted);line-height:1.7;
}

/* ===== FAQ ===== */
.faq-section{background:var(--bg)}
.faq-layout{
  display:grid;grid-template-columns:4fr 8fr;gap:64px;
}
.faq-left{
  display:flex;flex-direction:column;gap:20px;
}
.faq-left .btn{align-self:flex-start}
.faq-list{
  display:flex;flex-direction:column;gap:12px;
}
.faq-item{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:border-color .3s var(--transition);
}
.faq-item.active{
  border-color:var(--brand-border);
}
.faq-question{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;
  cursor:pointer;
  font-size:15px;font-weight:500;color:var(--text-primary);
  transition:color .3s var(--transition);
  position:relative;
}
.faq-item.active .faq-question{
  color:var(--brand);
}
.faq-item.active .faq-question::before{
  content:'';position:absolute;left:0;top:20%;bottom:20%;
  width:3px;background:var(--brand);border-radius:3px;
}
.faq-icon{
  width:20px;height:20px;
  stroke:var(--text-muted);
  stroke-width:1.5;fill:none;stroke-linecap:round;
  transition:transform .3s var(--transition),stroke .3s var(--transition);
  flex-shrink:0;
}
.faq-item.active .faq-icon{
  transform:rotate(45deg);
  stroke:var(--brand);
}
.faq-answer{
  max-height:0;overflow:hidden;
  transition:max-height .35s var(--transition);
}
.faq-answer-inner{
  padding:0 24px 20px;
  font-size:14px;line-height:1.7;color:var(--text-muted);
  border-top:1px solid var(--border);
  padding-top:16px;
  margin-top:4px;
}

/* ===== News ===== */
.news-section{background:var(--bg)}
.news-list{
  display:flex;flex-direction:column;gap:12px;
}
.news-item{
  display:flex;align-items:center;gap:32px;
  padding:24px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  transition:all .3s var(--transition);
}
.news-item:hover{
  border-color:var(--brand-border);
  box-shadow:var(--shadow-hover);
  transform:translateY(-2px);
}
.news-meta{
  display:flex;flex-direction:column;gap:8px;
  min-width:120px;
}
.news-date{
  font-size:13px;color:var(--text-muted);
  font-variant-numeric:tabular-nums;
}
.news-cat{
  display:inline-block;
  background:rgba(245,166,76,.12);color:var(--brand);
  font-size:12px;padding:2px 8px;border-radius:var(--radius-tag);
  width:fit-content;
}
.news-content{flex:1;min-width:0}
.news-title{
  font-size:16px;font-weight:600;color:var(--text-primary);
  margin-bottom:4px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.news-summary{
  font-size:14px;color:var(--text-muted);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.news-arrow{
  width:20px;height:20px;stroke:var(--text-muted);
  stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;
  flex-shrink:0;transition:all .3s var(--transition);
}
.news-item:hover .news-arrow{
  stroke:var(--brand);transform:translateX(4px);
}
.news-empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  height:280px;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius-md);
  color:var(--text-muted);gap:16px;
}
.news-empty svg{
  width:40px;height:40px;stroke:var(--text-muted);
  stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;
}
.news-empty p{font-size:14px}

/* ===== Contact ===== */
.contact-section{
  padding:96px 0;
  background:var(--panel);
  border-top:1px solid var(--border);
}
.contact-layout{
  display:grid;grid-template-columns:1fr 1fr;gap:64px;
}
.contact-info{
  display:flex;flex-direction:column;gap:16px;
}
.contact-info h2{margin-bottom:8px}
.contact-detail{
  display:flex;align-items:center;gap:12px;
  padding:12px 0;
  border-bottom:1px solid var(--border);
  font-size:14px;color:var(--text-secondary);
}
.contact-detail svg{
  width:20px;height:20px;stroke:var(--brand);
  stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;
}
.contact-form{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:32px;
}
.form-group{margin-bottom:20px}
.form-label{
  display:block;font-size:13px;font-weight:500;color:var(--text-primary);
  margin-bottom:8px;
}
.form-input,.form-textarea,.form-select{
  width:100%;
  background:var(--input-bg);
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius-sm);
  padding:14px 16px;
  font-size:14px;
  color:var(--text-primary);
  transition:all .25s var(--transition);
  outline:none;
}
.form-input::placeholder,.form-textarea::placeholder{
  color:var(--text-muted);
}
.form-input:focus,.form-textarea:focus,.form-select:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(245,166,76,.15);
}
.form-textarea{min-height:120px;resize:vertical}
.form-select{
  appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237C8790' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 14px center;
  cursor:pointer;
}
.contact-form .btn{width:100%;min-width:200px;margin-top:8px}

/* ===== Footer ===== */
.site-footer{
  background:#080B0F;
  padding:64px 0 0;
  border-top:1px solid var(--border);
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1.5fr 1.5fr 1.5fr;gap:48px;
  padding-bottom:48px;
}
.footer-brand{
  display:flex;align-items:center;gap:8px;margin-bottom:16px;
}
.footer-brand .brand-mark{font-size:18px}
.footer-brand .brand-text{font-size:14px}
.footer-desc{
  font-size:13px;line-height:1.7;color:var(--text-muted);
  max-width:260px;
}
.footer-col h4{
  font-size:14px;font-weight:600;color:var(--text-primary);
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{
  font-size:13px;color:var(--text-muted);
  transition:color .25s var(--transition);
}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  border-top:1px solid var(--border);
  padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;
  font-size:12px;color:var(--text-muted);
}

/* ===== Reveal Animation ===== */
.reveal{
  opacity:0;transform:translateY(20px);
  transition:opacity .5s var(--transition),transform .5s var(--transition);
}
.reveal.visible{
  opacity:1;transform:translateY(0);
}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-panel{max-width:520px}
  .service-layout{grid-template-columns:1fr;gap:40px}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-panel{display:none}
  .nav-actions .btn{display:none}
  .nav-toggle{display:flex}
  .nav-status{display:none}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .hero{padding:64px 0 48px}
  .case-card{grid-template-columns:1fr;gap:24px}
  .case-card.reverse .case-media{order:0}
  .case-card.reverse .case-content{order:1}
  .steps-row{grid-template-columns:1fr;gap:32px}
  .steps-row::before{display:none}
  .contact-layout{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .news-item{flex-direction:column;align-items:flex-start;gap:12px}
  .news-meta{flex-direction:row;align-items:center;min-width:0}
  .nav-wrap{padding:10px 16px}
  .brand-mark{font-size:17px}
  .brand-text{font-size:14px}
}
@media (max-width:520px){
  .metrics-grid{grid-template-columns:1fr 1fr;gap:24px}
  .metric-value{font-size:32px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .service-item{flex-direction:column;align-items:flex-start;gap:12px}
  .service-num{min-width:auto}
  .service-arrow{display:none}
  .faq-question{font-size:14px;padding:16px 20px}
  .faq-answer-inner{padding:0 20px 16px}
  .contact-form{padding:24px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    transition-duration:.01ms !important;
  }
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root {
  --bg: #0B0F14;
  --panel: #111720;
  --card: #161E27;
  --input-bg: #0F151C;
  --text-main: #F2F5F7;
  --text-secondary: #A6B0B9;
  --text-muted: #7C8790;
  --accent: #F5A64C;
  --accent-hover: #FFC274;
  --accent-border: rgba(245,166,76,.45);
  --success: #34D399;
  --warning: #F87171;
  --border: rgba(255,255,255,.08);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --shadow-hover: 0 18px 44px rgba(0,0,0,.45);
  --ease: cubic-bezier(.25,.8,.25,1);
  --font-serif: "Source Han Serif SC","Noto Serif CJK SC","Songti SC",serif;
  --font-sans: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s var(--ease);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  transition: all .2s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 24px rgba(245,166,76,.25);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255,255,255,.2);
  color: var(--text-main);
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: rgba(245,166,76,.08);
  color: var(--accent);
}

.btn-sm {
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
}

/* ===== 标签 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--radius-xs);
  background: rgba(245,166,76,.12);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: .08em;
  white-space: nowrap;
}

.tag-success {
  background: rgba(52,211,153,.12);
  color: var(--success);
}

/* ===== 状态点 ===== */
.dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px rgba(52,211,153,.5);
}

/* ===== 头部导航 ===== */
.site-header {
  position: sticky;
  top: 12px;
  z-index: 1000;
  padding: 0 20px;
}

.nav-wrap {
  max-width: 1200px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  padding: 10px 16px;
  gap: 18px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.brand-mark {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: .02em;
  line-height: 1.2;
}

.brand-divider {
  width: 1px;
  height: 18px;
  background: var(--border);
}

.brand-text {
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: .08em;
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 44px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: background .2s var(--ease), color .2s var(--ease);
  position: relative;
  white-space: nowrap;
}

.nav-item svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform .2s var(--ease);
}

.nav-item:hover {
  background: rgba(255,255,255,.06);
  color: var(--accent);
}

.nav-item:hover svg {
  transform: scale(1.05);
}

.nav-item.active {
  background: rgba(245,166,76,.12);
  color: var(--accent);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: 6px;
  right: 12px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  letter-spacing: .04em;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  background: var(--input-bg);
  transition: border-color .2s var(--ease);
  flex-shrink: 0;
}

.nav-toggle:hover {
  border-color: var(--accent);
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
}

/* ===== 小Hero ===== */
.page-hero {
  position: relative;
  padding: 88px 0 72px;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,15,20,.88) 0%, rgba(11,15,20,.72) 45%, var(--bg) 100%);
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color .2s var(--ease);
}

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

.breadcrumb-sep {
  color: var(--text-muted);
}

.page-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(34px, 6vw, 52px);
  font-weight: 800;
  line-height: 1.18;
  margin-bottom: 16px;
  color: var(--text-main);
  letter-spacing: .01em;
}

.page-hero h1 .hero-accent {
  color: var(--accent);
}

.hero-desc {
  max-width: 680px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.page-hero .btn {
  margin-top: 4px;
}

/* ===== 主体布局 ===== */
.main-body {
  padding: 64px 0 96px;
  background: var(--bg);
}

.content-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: start;
}

/* ===== 侧边栏 ===== */
.sidebar {
  position: sticky;
  top: 96px;
}

.sidebar-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow);
}

.sidebar-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  letter-spacing: .02em;
}

.sidebar-nav li {
  margin-bottom: 4px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  transition: background .2s var(--ease), color .2s var(--ease);
  position: relative;
}

.sidebar-nav a::before {
  content: '';
  width: 3px;
  height: 14px;
  border-radius: 2px;
  background: transparent;
  transition: background .2s var(--ease);
}

.sidebar-nav a:hover {
  background: rgba(255,255,255,.04);
  color: var(--text-main);
}

.sidebar-nav a.active {
  background: rgba(245,166,76,.1);
  color: var(--accent);
}

.sidebar-nav a.active::before {
  background: var(--accent);
}

.sidebar-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-secondary);
}

/* ===== 内容卡片区 ===== */
.main-content {
  display: flex;
  flex-direction: column;
  gap: 32px;
  min-width: 0;
}

.content-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.content-card:hover {
  border-color: rgba(245,166,76,.2);
  box-shadow: var(--shadow-hover);
}

.card-header {
  margin-bottom: 32px;
}

.eyebrow {
  display: block;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 10px;
  font-weight: 600;
}

.card-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 10px;
}

.card-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 620px;
}

/* ===== 入口类型列表 ===== */
.entry-list {
  display: flex;
  flex-direction: column;
}

.entry-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  transition: transform .25s var(--ease), background .25s var(--ease);
}

.entry-item:first-child {
  padding-top: 0;
}

.entry-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.entry-item:hover {
  transform: translateX(4px);
}

.entry-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(245,166,76,.08);
  border: 1px solid rgba(245,166,76,.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.entry-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.entry-item:hover .entry-icon {
  background: rgba(245,166,76,.15);
  border-color: var(--accent-border);
}

.entry-info {
  flex: 1;
  min-width: 0;
}

.entry-info h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}

.entry-info p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.entry-meta {
  flex-shrink: 0;
}

/* ===== 步骤流程 ===== */
.steps-list {
  position: relative;
  padding-left: 20px;
}

.steps-list::before {
  content: '';
  position: absolute;
  left: 23px;
  top: 32px;
  bottom: 32px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent-border) 0%, var(--border) 100%);
}

.step-item {
  position: relative;
  display: flex;
  gap: 20px;
  padding: 20px 0;
}

.step-item:first-child {
  padding-top: 0;
}

.step-item:last-child {
  padding-bottom: 0;
}

.step-num {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--card);
  border: 1px solid rgba(245,166,76,.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
  z-index: 1;
  transition: background .2s var(--ease);
}

.step-item:hover .step-num {
  background: rgba(245,166,76,.15);
}

.step-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}

.step-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== 平台功能 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: center;
}

.feature-list {
  display: flex;
  flex-direction: column;
}

.feature-item {
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.feature-item:first-child {
  padding-top: 0;
}

.feature-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.feature-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.feature-icon svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-text h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 2px;
}

.feature-text p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.feature-image {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.feature-image img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(11,15,20,.4) 100%);
  pointer-events: none;
}

/* ===== FAQ ===== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color .2s var(--ease);
}

.faq-item.open {
  border-color: var(--accent-border);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  text-align: left;
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  transition: color .2s var(--ease);
}

.faq-question:hover {
  color: var(--accent);
}

.faq-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  transition: transform .3s var(--ease);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s var(--ease);
}

.faq-answer p {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== CTA条 ===== */
.cta-strip {
  padding: 72px 0 96px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.cta-strip .container {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: var(--shadow);
  flex-wrap: wrap;
}

.cta-content h2 {
  font-family: var(--font-serif);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.cta-content p {
  font-size: 15px;
  color: var(--text-secondary);
}

.cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #0D1117;
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.footer-brand .brand-mark {
  font-size: 20px;
}

.footer-brand .brand-text {
  font-size: 14px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color .2s var(--ease);
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .content-layout {
    grid-template-columns: 220px 1fr;
    gap: 24px;
  }

  .content-card {
    padding: 32px;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .feature-image {
    max-width: 560px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .site-header {
    top: 8px;
    padding: 0 12px;
  }

  .nav-wrap {
    padding: 8px 12px;
    border-radius: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-panel {
    position: fixed;
    top: 0;
    right: -320px;
    width: 300px;
    height: 100vh;
    background: var(--panel);
    flex-direction: column;
    align-items: flex-start;
    padding: 88px 24px 24px;
    border-radius: 20px 0 0 20px;
    box-shadow: -10px 0 30px rgba(0,0,0,.5);
    transition: right .3s var(--ease);
    z-index: 999;
    gap: 8px;
    overflow-y: auto;
    border-left: 1px solid var(--border);
  }

  .nav-panel.nav-open {
    right: 0;
  }

  .nav-panel .nav-item {
    width: 100%;
    height: 48px;
    padding: 0 14px;
    font-size: 15px;
  }

  .nav-actions {
    display: none;
  }

  .page-hero {
    padding: 64px 0 56px;
  }

  .page-hero h1 {
    font-size: clamp(30px, 8vw, 42px);
  }

  .hero-desc {
    font-size: 15px;
  }

  .main-body {
    padding: 48px 0 72px;
  }

  .content-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .sidebar {
    position: static;
    top: auto;
  }

  .sidebar-card {
    padding: 20px;
  }

  .sidebar-nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
  }

  .sidebar-nav li {
    margin-bottom: 0;
  }

  .sidebar-nav a {
    padding: 8px 12px;
    font-size: 13px;
  }

  .sidebar-nav a::before {
    display: none;
  }

  .sidebar-status {
    margin-top: 14px;
    padding-top: 12px;
  }

  .content-card {
    padding: 24px;
    border-radius: 16px;
  }

  .entry-item {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .entry-meta {
    display: none;
  }

  .cta-strip .container {
    padding: 32px 24px;
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 520px) {
  .nav-status {
    display: none;
  }

  .page-hero h1 {
    font-size: 28px;
  }

  .hero-desc {
    font-size: 14px;
  }

  .page-hero .btn {
    width: 100%;
  }

  .content-card {
    padding: 20px;
  }

  .card-header h2 {
    font-size: 22px;
  }

  .entry-item {
    gap: 12px;
  }

  .entry-icon {
    width: 40px;
    height: 40px;
  }

  .entry-icon svg {
    width: 18px;
    height: 18px;
  }

  .entry-info h3 {
    font-size: 16px;
  }

  .entry-info p {
    font-size: 13px;
  }

  .steps-list {
    padding-left: 12px;
  }

  .step-num {
    width: 38px;
    height: 38px;
    font-size: 12px;
  }

  .step-item {
    gap: 14px;
  }

  .cta-actions {
    flex-direction: column;
    width: 100%;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

/* ===== 滚动淡入 ===== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* roulang page: article */
:root {
  --bg: #0B0F14;
  --panel: #111720;
  --card: #161E27;
  --input-bg: #0F151C;
  --text-main: #F2F5F7;
  --text-muted: #A6B0B9;
  --text-dim: #7C8790;
  --accent: #F5A64C;
  --accent-hover: #FFC274;
  --accent-line: rgba(245,166,76,.45);
  --success: #34D399;
  --danger: #F87171;
  --border: rgba(255,255,255,.08);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --shadow-hover: 0 18px 44px rgba(0,0,0,.45), 0 0 0 1px rgba(245,166,76,.12);
  --font-serif: "Source Han Serif SC","Noto Serif CJK SC","Songti SC",serif;
  --font-sans: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
  --ease: cubic-bezier(.25,.8,.25,1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s var(--ease);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.container-article {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
}

@media (max-width: 640px) {
  .container, .container-article {
    padding: 0 20px;
  }
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: all .25s var(--ease);
  white-space: nowrap;
}

.btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--accent);
  color: #0B0F14;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 24px rgba(245,166,76,.25);
  color: #0B0F14;
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255,255,255,.2);
  color: var(--text-main);
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: rgba(245,166,76,.08);
  color: var(--text-main);
}

.btn-sm {
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
}

/* ===== Header 导航 ===== */
.site-header {
  position: sticky;
  top: 12px;
  z-index: 1000;
  padding: 12px 20px 8px;
}

.nav-wrap {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(17, 23, 32, .95);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 12px 18px;
  box-shadow: var(--shadow);
}

@media (min-width: 769px) {
  .nav-wrap {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: .02em;
}

.brand-divider {
  width: 1px;
  height: 20px;
  background: rgba(255,255,255,.12);
}

.brand-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  min-width: 90px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  position: relative;
  transition: background .22s var(--ease), color .22s var(--ease);
}

.nav-item svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.nav-item:hover {
  background: rgba(255,255,255,.06);
  color: var(--accent);
}

.nav-item.active,
.nav-item.current-page {
  background: rgba(245,166,76,.12);
  color: var(--accent);
}

.nav-item.active::after,
.nav-item.current-page::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 6px;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.04);
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  transition: background .2s var(--ease), border-color .2s var(--ease);
  flex-shrink: 0;
}

.nav-toggle:hover {
  background: rgba(255,255,255,.08);
  border-color: var(--accent-line);
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (max-width: 768px) {
  .nav-wrap {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .nav-panel {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(340px, 85vw);
    height: 100vh;
    background: #0F151C;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 8px;
    padding: 28px 20px;
    border-left: 1px solid var(--border);
    box-shadow: -20px 0 40px rgba(0,0,0,.5);
    transition: right .3s var(--ease);
    z-index: 200;
    overflow-y: auto;
  }

  .nav-panel.open {
    right: 0;
  }

  .nav-panel .nav-item {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    min-width: 0;
  }

  .nav-panel .nav-item.active::after,
  .nav-panel .nav-item.current-page::after {
    left: 12px;
    bottom: auto;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
  }

  .nav-actions {
    display: none;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 28px;
  padding: 10px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  line-height: 1.4;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color .2s;
}

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

.breadcrumb-sep {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: var(--text-dim);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

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

@media (max-width: 640px) {
  .breadcrumb-title {
    max-width: 160px;
  }
}

/* ===== 文章主体 ===== */
.article-main {
  padding: 56px 0 40px;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(245,166,76,.06), transparent 45%),
    radial-gradient(ellipse at 80% 5%, rgba(255,255,255,.03), transparent 40%),
    var(--bg);
  min-height: 60vh;
}

.article-post {
  max-width: 720px;
  margin: 0 auto;
}

.article-head {
  animation: fadeUp .55s .05s both var(--ease);
  margin-bottom: 36px;
}

.article-head h1 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .01em;
  color: var(--text-main);
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 13px;
  color: var(--text-dim);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-item svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: var(--text-dim);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.meta-label {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  background: rgba(245,166,76,.12);
  color: var(--accent);
  border-radius: var(--radius-xs);
  font-size: 12px;
  font-weight: 500;
}

/* ===== 正文排版 ===== */
.article-content {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-main);
  animation: fadeUp .55s .15s both var(--ease);
}

.article-content > * + * {
  margin-top: 20px;
}

.article-content p {
  margin-bottom: 24px;
  color: var(--text-muted);
}

.article-content p:last-child {
  margin-bottom: 0;
}

.article-content h2 {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-main);
  margin-top: 44px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-main);
  margin-top: 36px;
  margin-bottom: 12px;
}

.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 28px;
  margin-bottom: 10px;
}

.article-content ul,
.article-content ol {
  padding-left: 32px;
  margin-bottom: 24px;
  color: var(--text-muted);
}

.article-content ul li {
  list-style: disc;
  margin-bottom: 8px;
  padding-left: 4px;
}

.article-content ol li {
  list-style: decimal;
  margin-bottom: 8px;
  padding-left: 4px;
}

.article-content li::marker {
  color: var(--accent);
}

.article-content blockquote {
  margin: 28px 0;
  padding: 18px 22px;
  background: rgba(255,255,255,.04);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  color: var(--text-muted);
  font-style: normal;
}

.article-content blockquote p {
  margin-bottom: 0;
  color: var(--text-muted);
}

.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.article-content a:hover {
  color: var(--accent-hover);
}

.article-content img {
  border-radius: var(--radius-md);
  margin: 24px 0;
  box-shadow: var(--shadow);
}

.article-content strong {
  color: var(--text-main);
  font-weight: 600;
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 36px 0;
}

/* ===== 相关推荐 ===== */
.related-section {
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  animation: fadeUp .55s .25s both var(--ease);
}

.related-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.related-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(245,166,76,.35);
  box-shadow: var(--shadow-hover);
}

.related-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.related-thumb {
  width: 100px;
  height: 68px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(245,166,76,.12), rgba(255,255,255,.04));
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.related-info {
  min-width: 0;
}

.related-info h3 {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text-main);
  margin-bottom: 6px;
  transition: color .2s;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card:hover .related-info h3 {
  color: var(--accent);
}

.related-meta {
  font-size: 12px;
  color: var(--text-dim);
}

/* ===== 文章底部操作 ===== */
.article-actions {
  margin-top: 40px;
  animation: fadeUp .55s .3s both var(--ease);
}

/* ===== 空状态 ===== */
.article-empty {
  max-width: 720px;
  margin: 0 auto;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px 32px;
}

.empty-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.empty-icon svg {
  width: 40px;
  height: 40px;
  fill: none;
  stroke: var(--text-dim);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.article-empty h2 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.article-empty p {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 24px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #0D1218;
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
  margin-top: 48px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand .brand-mark {
  font-size: 20px;
}

.footer-brand .brand-text {
  font-size: 20px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color .2s, padding-left .2s;
}

.footer-col a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-dim);
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

/* ===== 动画 ===== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ===== 响应式调整 ===== */
@media (max-width: 768px) {
  .article-main {
    padding: 40px 0 24px;
  }

  .article-content {
    font-size: 16px;
    line-height: 1.75;
  }

  .article-content h2 {
    font-size: 22px;
  }

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

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

  .article-head h1 {
    font-size: 28px;
  }
}

@media (max-width: 520px) {
  .article-meta {
    gap: 12px;
  }

  .related-thumb {
    width: 88px;
    height: 60px;
  }

  .btn {
    width: 100%;
  }

  .article-actions .btn {
    width: auto;
  }
}

/* roulang page: category2 */
:root{
  --bg:#0B0F14;
  --bg-panel:#111720;
  --bg-card:#161E27;
  --bg-input:#0F151C;
  --text-main:#F2F5F7;
  --text-sub:#A6B0B9;
  --text-weak:#7C8790;
  --brand:#F5A64C;
  --brand-hover:#FFC274;
  --brand-border:rgba(245,166,76,.45);
  --success:#34D399;
  --danger:#F87171;
  --line:rgba(255,255,255,.08);
  --line-hover:rgba(245,166,76,.35);
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --radius-tag:6px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --shadow-hover:0 18px 44px rgba(0,0,0,.45),0 0 0 1px rgba(245,166,76,.12);
  --font-serif:"Source Han Serif SC","Noto Serif CJK SC","Songti SC",serif;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text-main);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button,input,textarea{font-family:inherit;font-size:inherit;border:none;outline:none;background:none;color:inherit}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-tight{padding:64px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--brand);text-transform:uppercase;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--brand)}
.section-title{
  font-family:var(--font-serif);
  font-size:42px;font-weight:700;line-height:1.25;
  letter-spacing:.02em;
}
.section-lead{
  color:var(--text-sub);
  font-size:16px;
  max-width:680px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 28px;border-radius:var(--radius-sm);
  font-weight:600;font-size:15px;letter-spacing:.02em;
  transition:all .25s cubic-bezier(.25,.8,.25,1);
  cursor:pointer;white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#0B0F14}
.btn-primary:hover{background:var(--brand-hover);box-shadow:0 0 24px rgba(245,166,76,.25)}
.btn-secondary{
  background:transparent;border:1px solid rgba(255,255,255,.2);
  color:var(--text-main);
}
.btn-secondary:hover{border-color:var(--brand);background:rgba(245,166,76,.08)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
/* 导航 */
.site-header{
  position:sticky;top:0;z-index:100;
  padding:16px 32px 0;
  background:transparent;
}
.nav-wrap{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;
  background:rgba(17,23,32,.98);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:10px 16px;
  box-shadow:var(--shadow);
  backdrop-filter:blur(12px);
  transition:top .3s ease;
}
.brand{
  display:flex;align-items:center;gap:10px;
  flex-shrink:0;padding:0 12px 0 4px;
}
.brand-mark{
  font-family:var(--font-serif);
  font-size:18px;font-weight:800;color:var(--text-main);
  letter-spacing:.04em;
}
.brand-divider{
  width:1px;height:18px;background:var(--line);
}
.brand-text{
  font-size:16px;font-weight:700;color:var(--brand);
  letter-spacing:.08em;
}
.nav-panel{
  display:flex;align-items:center;gap:8px;
  margin-left:20px;flex:1;
}
.nav-item{
  display:inline-flex;align-items:center;gap:8px;
  height:44px;min-width:96px;
  padding:0 14px;border-radius:10px;
  color:var(--text-sub);
  font-size:13px;font-weight:500;
  transition:all .2s ease;
  position:relative;
}
.nav-item svg{
  width:20px;height:20px;fill:none;stroke:currentColor;
  stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;
  flex-shrink:0;
}
.nav-item:hover{
  background:rgba(255,255,255,.06);
  color:var(--brand);
}
.nav-item.active{
  background:rgba(245,166,76,.12);
  color:var(--brand);
}
.nav-item.active::after{
  content:"";
  position:absolute;right:12px;bottom:6px;
  width:6px;height:6px;border-radius:50%;
  background:var(--brand);
}
.nav-actions{
  display:flex;align-items:center;gap:12px;
  margin-left:auto;flex-shrink:0;
}
.nav-status{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:var(--text-sub);
  background:rgba(52,211,153,.08);
  border:1px solid rgba(52,211,153,.2);
  padding:4px 12px;border-radius:20px;
}
.nav-status .dot{
  width:6px;height:6px;border-radius:50%;background:var(--success);
  box-shadow:0 0 8px rgba(52,211,153,.6);
}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  cursor:pointer;align-items:center;justify-content:center;
  border:1px solid var(--line);
  margin-left:8px;
}
.nav-toggle svg{width:20px;height:20px;fill:none;stroke:var(--text-sub);stroke-width:1.5}
/* Hero 安全分类 */
.cat-hero{
  position:relative;
  padding:96px 0 72px;
  background:linear-gradient(180deg,rgba(11,15,20,.82) 0%,#0B0F14 100%),url('/assets/images/backpic/back-3.png') center/cover no-repeat;
}
.cat-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:32px 32px;
  pointer-events:none;
}
.cat-hero .container{position:relative;z-index:2}
.cat-breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--text-weak);
  margin-bottom:24px;
}
.cat-breadcrumb a{color:var(--text-sub);transition:color .2s}
.cat-breadcrumb a:hover{color:var(--brand)}
.cat-breadcrumb span{color:var(--text-weak)}
.cat-hero h1{
  font-family:var(--font-serif);
  font-size:52px;font-weight:800;line-height:1.15;
  letter-spacing:.02em;
}
.cat-hero h1 .highlight{color:var(--brand)}
.cat-hero .hero-desc{
  margin-top:20px;
  font-size:17px;color:var(--text-sub);
  max-width:680px;
  line-height:1.8;
}
.cat-hero .breadcrumb-link{
  margin-top:32px;
}
/* 主体布局 */
.main-layout{
  display:grid;
  grid-template-columns:300px 1fr;
  gap:48px;
  align-items:start;
}
/* 左侧目录 */
.side-nav{
  position:sticky;top:140px;
  background:var(--bg-panel);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:24px;
}
.side-nav-title{
  font-size:14px;font-weight:700;color:var(--text-main);
  letter-spacing:.06em;
  margin-bottom:16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.side-nav-list li{
  margin-bottom:8px;
}
.side-nav-list a{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;
  border-radius:8px;
  font-size:14px;color:var(--text-sub);
  transition:all .2s ease;
}
.side-nav-list a .num{
  font-size:12px;color:var(--text-weak);
  font-variant-numeric:tabular-nums;
}
.side-nav-list a:hover{
  background:rgba(245,166,76,.08);
  color:var(--brand);
}
.side-nav-list a .num{color:var(--brand)}
.side-nav-list li:first-child a{background:rgba(245,166,76,.1);color:var(--brand)}
/* 正文卡片 */
.content-card{
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:40px;
  margin-bottom:32px;
  transition:box-shadow .3s ease;
}
.content-card:hover{
  box-shadow:var(--shadow);
}
.content-card .card-head{
  display:flex;align-items:center;gap:16px;
  margin-bottom:24px;
}
.card-index{
  font-family:var(--font-serif);
  font-size:36px;font-weight:800;
  color:rgba(245,166,76,.35);
  line-height:1;
  font-variant-numeric:tabular-nums;
}
.card-title{
  font-family:var(--font-serif);
  font-size:28px;font-weight:700;
  color:var(--text-main);
}
.content-card p{
  color:var(--text-sub);
  margin-bottom:20px;
  font-size:16px;
  line-height:1.8;
}
.content-card p:last-child{margin-bottom:0}
.content-card .feature-list{
  margin-top:24px;
}
.content-card .feature-list li{
  display:flex;align-items:flex-start;gap:12px;
  padding:12px 0;
  border-bottom:1px solid var(--line);
  color:var(--text-sub);
  font-size:15px;
}
.content-card .feature-list li:last-child{border-bottom:none}
.content-card .feature-list svg{
  width:20px;height:20px;flex-shrink:0;
  fill:none;stroke:var(--brand);stroke-width:1.5;
  stroke-linecap:round;stroke-linejoin:round;
  margin-top:2px;
}
.tag{
  display:inline-block;
  background:rgba(245,166,76,.12);
  color:var(--brand);
  font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:var(--radius-tag);
  letter-spacing:.04em;
}
/* 流程模块 */
.process-section{
  background:var(--bg-panel);
  border-radius:var(--radius-lg);
  padding:48px;
  margin-bottom:32px;
}
.process-section .process-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  margin-bottom:40px;
  flex-wrap:wrap;gap:16px;
}
.process-steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0;
  position:relative;
}
.process-steps {
  background: transparent;
}
.process-steps .step{
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  transition: all .3s ease;
  position: relative;
}
.process-steps .step:hover{
  border-color: var(--line-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.process-steps .step + .step{
  margin-top: 0;
}
.process-steps .step-num{
  font-family:var(--font-serif);
  font-size:32px;font-weight:800;
  color:var(--brand);
  opacity:.6;
  line-height:1;
  font-variant-numeric:tabular-nums;
}
.process-steps .step-icon{
  width:40px;height:40px;
  border-radius:10px;
  background:rgba(245,166,76,.08);
  display:flex;align-items:center;justify-content:center;
  margin:16px 0 12px;
}
.process-steps .step-icon svg{
  width:20px;height:20px;fill:none;stroke:var(--brand);
  stroke-width:1.5;
}
.process-steps .step h3{
  font-size:18px;
  font-weight:600;
  margin-bottom:8px;
}
.process-steps .step p{
  font-size:14px;
  color:var(--text-sub);
  line-height:1.6;
}
/* FAQ */
.faq-layout{
  display:grid;
  grid-template-columns:360px 1fr;
  gap:48px;
}
.faq-acc{
  display:flex;
  flex-direction:column;
  gap:0;
}
.faq-item{
  background:var(--bg-card);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .3s ease;
}
.faq-item:hover{border-color:var(--line-hover)}
.faq-item.open{border-color:var(--brand-border)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 24px;
  cursor:pointer;
  font-weight:600;
  font-size:16px;
  color:var(--text-main);
  transition:color .2s ease;
}
.faq-q .icon{
  width:32px;height:32px;flex-shrink:0;
  border-radius:8px;
  background:rgba(255,255,255,.04);
  display:flex;align-items:center;justify-content:center;
  transition:all .3s ease;
  position:relative;
}
.faq-q .icon::before,.faq-q .icon::after{
  content:"";position:absolute;
  background:var(--text-sub);
  border-radius:2px;
  transition:background .3s ease;
}
.faq-q .icon::before{width:12px;height:2px}
.faq-q .icon::after{width:2px;height:12px}
.faq-item.open .icon{background:rgba(245,166,76,.15)}
.faq-item.open .icon::before,.faq-item.open .icon::after{background:var(--brand)}
.faq-item.open .icon::after{transform:scaleY(0)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .35s cubic-bezier(.25,.8,.25,1);
}
.faq-a-inner{
  padding:0 24px 20px;
  color:var(--text-sub);
  font-size:15px;
  line-height:1.75;
}
.faq-a-inner::before{
  content:"";display:block;
  width:24px;height:2px;
  background:var(--brand);
  margin-bottom:12px;
}
/* CTA */
.cta-panel{
  background:var(--bg-panel);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-panel h2{
  font-family:var(--font-serif);
  font-size:28px;
  font-weight:700;
}
.cta-panel p{
  color:var(--text-sub);
  margin-top:8px;
  font-size:15px;
}
/* 图片配图 */
.content-image{
  border-radius:var(--radius-md);
  overflow:hidden;
  margin:24px 0;
  border:1px solid var(--line);
}
.content-image img{
  width:100%;
  height:auto;
  aspect-ratio:16/10;
  object-fit:cover;
  background:var(--bg-input);
}
/* 页脚 */
.site-footer{
  background:var(--bg-panel);
  border-top:1px solid var(--line);
  padding:64px 0 32px;
  margin-top:96px;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
  padding-bottom:48px;
  border-bottom:1px solid var(--line);
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  margin-bottom:16px;
}
.footer-brand .brand-mark{
  font-family:var(--font-serif);
  font-size:18px;font-weight:800;
}
.footer-brand .brand-text{
  font-size:16px;font-weight:700;color:var(--brand);
  letter-spacing:.08em;
}
.footer-desc{
  color:var(--text-sub);
  font-size:14px;
  line-height:1.7;
  max-width:300px;
}
.footer-col h4{
  font-size:14px;font-weight:700;
  letter-spacing:.06em;
  margin-bottom:16px;
  color:var(--text-main);
}
.footer-col ul li{
  margin-bottom:10px;
}
.footer-col ul a{
  color:var(--text-sub);
  font-size:14px;
  transition:color .2s ease;
}
.footer-col ul a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  padding-top:24px;
  color:var(--text-weak);
  font-size:13px;
  flex-wrap:wrap;gap:8px;
}
/* 响应式 */
@media (max-width:1024px){
  .main-layout{grid-template-columns:1fr;gap:32px}
  .side-nav{position:static;padding:20px}
  .side-nav-list{display:flex;flex-wrap:wrap;gap:8px}
  .side-nav-list li{margin-bottom:0}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .process-steps{grid-template-columns:1fr;gap:16px}
  .process-steps .step + .step{margin-top:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .site-header{padding:12px 20px 0}
  .nav-wrap{flex-wrap:wrap;padding:10px 12px}
  .nav-panel{
    display:none;
    position:fixed;top:0;right:-100%;width:320px;height:100vh;
    background:var(--bg-panel);
    flex-direction:column;
    align-items:flex-start;
    padding:80px 24px 24px;
    transition:right .3s ease;
    box-shadow:-10px 0 30px rgba(0,0,0,.5);
    z-index:999;
    margin-left:0;
  }
  .nav-panel.open{
    right:0;
    display:flex;
  }
  .nav-panel .nav-item{
    width:100%;
    height:48px;
  }
  .nav-actions{
    margin-left:auto;
  }
  .nav-status{display:none}
  .nav-toggle{display:flex}
  .cat-hero{padding:64px 0 48px}
  .cat-hero h1{font-size:36px}
  .cat-hero .hero-desc{font-size:15px}
  .content-card{padding:28px 20px}
  .card-title{font-size:24px}
  .card-index{font-size:28px}
  .cta-panel{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .nav-wrap{padding:8px 10px}
  .brand-mark{font-size:16px}
  .brand-text{font-size:14px}
  .cat-hero h1{font-size:28px}
  .cat-breadcrumb{font-size:12px}
  .process-section{padding:28px 16px}
  .process-steps .step{padding:20px 16px}
  .cta-panel{padding:28px 20px}
  .cta-panel h2{font-size:22px}
  .side-nav{padding:16px}
  .content-card{padding:20px 16px}
  .card-title{font-size:20px}
  .faq-q{padding:16px 16px;font-size:14px}
  .faq-a-inner{padding:0 16px 16px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{transition-duration:.01ms!important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root {
  --bg-page: #0B0F14;
  --bg-panel: #111720;
  --bg-card: #161E27;
  --bg-input: #0F151C;
  --text-primary: #F2F5F7;
  --text-secondary: #A6B0B9;
  --text-muted: #7C8790;
  --accent: #F5A64C;
  --accent-hover: #FFC274;
  --accent-soft: rgba(245, 166, 76, .12);
  --accent-border: rgba(245, 166, 76, .45);
  --success: #34D399;
  --warning: #F87171;
  --border: rgba(255, 255, 255, .08);
  --border-strong: rgba(255, 255, 255, .14);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  --shadow-hover: 0 18px 44px rgba(0, 0, 0, .45), 0 0 0 1px rgba(245, 166, 76, .12);
  --ease: cubic-bezier(.25, .8, .25, 1);
  --font-serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  display: block;
  border: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s var(--ease);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 8px;
}

button, input, textarea, select {
  font: inherit;
  border: none;
  outline: none;
  background: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 12px;
  z-index: 200;
  padding: 0 32px;
}

.nav-wrap {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
  background: rgba(17, 23, 32, .96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 12px 18px;
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text-primary);
  white-space: nowrap;
}

.brand-divider {
  width: 1px;
  height: 16px;
  background: var(--border-strong);
}

.brand-text {
  font-size: 15px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 12px;
  min-width: 92px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  position: relative;
  transition: background .2s var(--ease), color .2s var(--ease);
}

.nav-item svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.nav-item:hover {
  background: rgba(255, 255, 255, .06);
  color: var(--accent-hover);
}

.nav-item.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  right: 12px;
  bottom: 5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.nav-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.nav-status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, .14);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: .65; }
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  cursor: pointer;
  background: var(--bg-card);
  transition: border-color .2s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--accent-border);
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .5);
  z-index: 180;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s var(--ease), visibility .25s var(--ease);
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
  white-space: nowrap;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--accent);
  color: #0B0F14;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 24px rgba(245, 166, 76, .25);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, .2);
  color: var(--text-primary);
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: rgba(245, 166, 76, .08);
}

.btn-sm {
  height: 40px;
  padding: 0 22px;
  font-size: 14px;
}

.btn-block {
  width: 100%;
}

/* ========== Badge / Tag ========== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-xs);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 1.5;
}

.tag-success {
  background: rgba(52, 211, 153, .12);
  color: var(--success);
}

.tag-muted {
  background: rgba(255, 255, 255, .05);
  color: var(--text-muted);
}

/* ========== Page Hero ========== */
.page-hero {
  position: relative;
  padding: 80px 0 60px;
  background:
    linear-gradient(180deg, rgba(11, 15, 20, .82) 0%, rgba(11, 15, 20, .92) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .025) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.page-hero::after {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 166, 76, .08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.hero-breadcrumb a {
  color: var(--text-muted);
  transition: color .2s var(--ease);
}

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

.hero-breadcrumb .sep {
  color: var(--border-strong);
}

.hero-breadcrumb .current {
  color: var(--text-secondary);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero-eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.page-title {
  font-family: var(--font-serif);
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: .01em;
  max-width: 760px;
}

.hero-desc {
  margin-top: 20px;
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.8;
}

/* ========== Category Layout ========== */
.category-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 40px;
  padding: 56px 0 72px;
}

.toc-panel {
  position: sticky;
  top: 100px;
  align-self: start;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

.toc-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 0 8px 14px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 14px;
}

.toc-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 8px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background .2s var(--ease), color .2s var(--ease);
}

.toc-item span {
  font-size: 12px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
  transition: color .2s var(--ease);
}

.toc-item:hover {
  background: rgba(255, 255, 255, .04);
  color: var(--text-primary);
}

.toc-item.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.toc-item.active span {
  color: var(--accent);
}

.content-main {
  display: flex;
  flex-direction: column;
  gap: 48px;
  min-width: 0;
}

.content-section {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: box-shadow .25s var(--ease);
}

.content-section:hover {
  box-shadow: var(--shadow);
}

.section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}

.section-num {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px var(--accent);
  line-height: 1.2;
  flex-shrink: 0;
  letter-spacing: .02em;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.3;
}

.section-lead {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 720px;
}

/* ===== Process Steps ===== */
.process-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  transition: transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 166, 76, .35);
  box-shadow: var(--shadow-hover);
}

.step-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.step-index {
  font-size: 28px;
  font-weight: 700;
  font-family: var(--font-serif);
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.step-tag {
  font-size: 12px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 100px;
  white-space: nowrap;
}

.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Split Block ===== */
.split-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 28px;
}

.split-img {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #1c2531, #0e141a);
}

.split-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.split-text h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.35;
}

.split-text p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.75;
}

.split-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.split-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--text-primary);
}

.split-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 8px;
}

/* ===== Feature Grid ===== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  gap: 16px;
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.feature-card:hover {
  border-color: rgba(245, 166, 76, .3);
  transform: translateX(4px);
}

.feature-icon {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card .feature-text h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.feature-card .feature-text p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== Ops Grid ===== */
.ops-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.ops-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}

.ops-card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 166, 76, .3);
  box-shadow: var(--shadow-hover);
}

.ops-card .ops-value {
  font-size: 30px;
  font-weight: 700;
  font-family: var(--font-serif);
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.ops-card .ops-label {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.ops-card .ops-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== Support Block ===== */
.support-bar {
  display: flex;
  align-items: center;
  gap: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  flex-wrap: wrap;
}

.support-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-primary);
}

.support-item svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.support-item span {
  color: var(--text-secondary);
}

.support-item strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ===== CTA Panel ===== */
.cta-panel {
  background:
    linear-gradient(180deg, rgba(245, 166, 76, .06) 0%, transparent 60%),
    var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 52px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 2px;
  background: var(--accent);
  opacity: .6;
}

.cta-panel h2 {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.5vw, 34px);
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-panel p {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.75;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== Footer ========== */
.site-footer {
  background: #080C11;
  border-top: 1px solid var(--border);
  padding: 64px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, .05);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-brand .brand-mark {
  font-size: 18px;
  color: var(--text-primary);
}

.footer-brand .brand-text {
  font-size: 15px;
  color: var(--text-secondary);
}

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

.site-footer h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: .04em;
}

.site-footer .footer-col ul li {
  margin-bottom: 10px;
}

.site-footer .footer-col ul li a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}

.site-footer .footer-col ul li a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ========== Animations ========== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-inner > * {
  animation: fadeUp .6s var(--ease) both;
}

.hero-inner > *:nth-child(1) { animation-delay: .05s; }
.hero-inner > *:nth-child(2) { animation-delay: .12s; }
.hero-inner > *:nth-child(3) { animation-delay: .2s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .category-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .toc-panel {
    position: static;
    top: auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
    padding: 14px;
  }

  .toc-title {
    width: 100%;
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 8px;
  }

  .toc-item {
    padding: 8px 12px;
    font-size: 13px;
  }

  .split-block {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .site-header {
    top: 8px;
    padding: 0 16px;
  }

  .nav-wrap {
    padding: 10px 14px;
    gap: 12px;
  }

  .nav-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    background: var(--bg-panel);
    flex-direction: column;
    align-items: stretch;
    padding: 80px 20px 28px;
    gap: 4px;
    transform: translateX(100%);
    transition: transform .3s var(--ease);
    box-shadow: var(--shadow);
    border-left: 1px solid var(--border);
    z-index: 200;
    justify-content: flex-start;
  }

  .nav-panel.open {
    transform: translateX(0);
  }

  .nav-item {
    min-width: 0;
    height: 48px;
  }

  .nav-actions {
    margin-left: auto;
  }

  .nav-status {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .container {
    padding: 0 20px;
  }

  .page-hero {
    padding: 56px 0 44px;
  }

  .hero-inner {
    padding: 0 20px;
  }

  .category-layout {
    padding: 36px 0 56px;
  }

  .content-section {
    padding: 24px;
  }

  .process-grid,
  .feature-grid,
  .ops-grid {
    grid-template-columns: 1fr;
  }

  .cta-panel {
    padding: 36px 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .brand-text {
    display: none;
  }

  .nav-wrap {
    gap: 8px;
  }

  .btn-sm {
    padding: 0 16px;
  }

  .page-title {
    font-size: 30px;
  }

  .section-title {
    font-size: 22px;
  }

  .section-num {
    font-size: 22px;
  }

  .step-card {
    padding: 20px;
  }

  .split-block {
    padding: 20px;
  }

  .feature-card {
    padding: 20px;
  }

  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .support-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}