/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #0b1a30;
  --primary-light: #162a48;
  --primary-lighter: #1f3a5c;
  --accent: #c9a84c;
  --accent-light: #e2c67a;
  --accent-glow: rgba(201, 168, 76, 0.25);
  --bg: #f7f5f1;
  --bg-card: #ffffff;
  --bg-dark: #080e1a;
  --text: #16161a;
  --text-secondary: #5a5f6e;
  --text-muted: #8a8f9e;
  --text-on-dark: #edeae2;
  --text-on-dark-muted: #a8a4b0;
  --border: #e3ddd2;
  --border-light: #f0ebe3;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-xs: 4px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow: 0 6px 28px rgba(0,0,0,0.07);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.10);
  --shadow-accent: 0 4px 20px rgba(201, 168, 76, 0.25);
  --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -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 var(--transition); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--radius-xs); }
button { font-family: inherit; cursor: pointer; border: none; background: none; font-size: inherit; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--radius-xs); }
input, textarea { font-family: inherit; font-size: inherit; }
ul { list-style: none; }
::selection { background: var(--accent); color: #fff; }
::-moz-selection { background: var(--accent); color: #fff; }

/* ===== 容器 ===== */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 18px; } }

/* ===== 导航 ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(11, 26, 48, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled { background: rgba(8, 14, 26, 0.96); box-shadow: 0 2px 32px rgba(0,0,0,0.3); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
}
.logo {
  font-size: 20px; font-weight: 700; letter-spacing: -0.3px;
  color: var(--text-on-dark);
  display: flex; align-items: center; gap: 8px;
  white-space: nowrap;
}
.logo i { color: var(--accent); font-size: 22px; }
.logo span { background: linear-gradient(135deg, var(--text-on-dark) 0%, var(--accent-light) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-center { display: flex; align-items: center; gap: 36px; }
.nav-link {
  color: var(--text-on-dark-muted); font-size: 15px; font-weight: 500;
  position: relative; padding: 4px 0; transition: color var(--transition);
  letter-spacing: 0.2px;
}
.nav-link:hover { color: var(--text-on-dark); }
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 2px; background: var(--accent);
  transition: width var(--transition); border-radius: 2px;
}
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: var(--accent-light); }
.nav-link.active::after { width: 100%; background: var(--accent); }
.nav-right { display: flex; align-items: center; gap: 14px; }
.search-box {
  display: flex; align-items: center;
  background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.08);
  border-radius: 40px; padding: 0 14px; height: 40px;
  transition: all var(--transition); min-width: 180px;
}
.search-box:focus-within { background: rgba(255,255,255,0.12); border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.search-box i { color: var(--text-on-dark-muted); font-size: 14px; margin-right: 8px; }
.search-box input {
  background: transparent; border: none; outline: none;
  color: var(--text-on-dark); font-size: 14px; width: 100%;
}
.search-box input::placeholder { color: var(--text-on-dark-muted); font-size: 13px; }
.btn-cta-nav {
  background: linear-gradient(135deg, var(--accent) 0%, #b8942e 100%);
  color: #0b1a30; font-weight: 600; font-size: 14px;
  padding: 10px 22px; border-radius: 40px;
  transition: all var(--transition); white-space: nowrap;
  box-shadow: 0 2px 12px var(--accent-glow);
}
.btn-cta-nav:hover { transform: translateY(-1px); box-shadow: 0 4px 24px var(--accent-glow); }
.btn-cta-nav:active { transform: scale(0.97); }
.mobile-toggle { display: none; color: var(--text-on-dark); font-size: 22px; cursor: pointer; padding: 6px; }

@media (max-width: 900px) {
  .nav-center { display: none; }
  .nav-right .search-box { display: none; }
  .mobile-toggle { display: block; }
  .mobile-menu-open .nav-center {
    display: flex; flex-direction: column; gap: 18px;
    position: fixed; top: var(--nav-height); left: 0; right: 0;
    background: rgba(8, 14, 26, 0.98); backdrop-filter: blur(20px);
    padding: 28px 24px; border-bottom: 1px solid rgba(255,255,255,0.06);
    align-items: flex-start;
  }
  .mobile-menu-open .nav-right .search-box {
    display: flex; margin-top: 12px; width: 100%;
  }
  .mobile-menu-open .nav-right .btn-cta-nav { display: none; }
}

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 92vh;
  display: flex; align-items: center;
  padding-top: var(--nav-height);
  background: var(--bg-dark);
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.35; transform: scale(1.02);
  transition: transform 0.6s ease;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(8,14,26,0.88) 0%, rgba(8,14,26,0.60) 50%, rgba(8,14,26,0.70) 100%);
}
.hero-content { position: relative; z-index: 2; width: 100%; padding: 80px 0 100px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(201, 168, 76, 0.12); border: 1px solid rgba(201, 168, 76, 0.20);
  border-radius: 40px; padding: 6px 18px 6px 10px;
  color: var(--accent-light); font-size: 13px; font-weight: 500;
  margin-bottom: 28px; letter-spacing: 0.3px;
}
.hero-badge i { font-size: 12px; }
.hero h1 {
  font-size: clamp(38px, 7vw, 72px);
  font-weight: 800; line-height: 1.12; letter-spacing: -1.5px;
  color: var(--text-on-dark);
  max-width: 820px; margin-bottom: 24px;
}
.hero h1 span { background: linear-gradient(135deg, var(--accent-light) 0%, #f0d68a 50%, var(--accent) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-on-dark-muted);
  max-width: 600px; line-height: 1.7; margin-bottom: 36px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  background: linear-gradient(135deg, var(--accent) 0%, #b8942e 100%);
  color: #0b1a30; font-weight: 600; font-size: 16px;
  padding: 14px 32px; border-radius: 40px;
  transition: all var(--transition);
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 36px var(--accent-glow); }
.btn-primary:active { transform: scale(0.97); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  color: var(--text-on-dark); font-weight: 500; font-size: 16px;
  padding: 14px 28px; border-radius: 40px;
  transition: all var(--transition);
}
.btn-secondary:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.20); transform: translateY(-1px); }
.hero-stats {
  display: flex; flex-wrap: wrap; gap: 40px;
  margin-top: 56px; padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.hero-stat-item { display: flex; flex-direction: column; }
.hero-stat-num { font-size: 28px; font-weight: 700; color: var(--text-on-dark); letter-spacing: -0.5px; }
.hero-stat-num i { color: var(--accent); font-size: 20px; margin-right: 6px; }
.hero-stat-label { font-size: 13px; color: var(--text-on-dark-muted); margin-top: 4px; }

@media (max-width: 768px) {
  .hero { min-height: auto; padding-bottom: 60px; }
  .hero-content { padding: 60px 0 40px; }
  .hero-stats { gap: 24px; margin-top: 40px; padding-top: 24px; }
  .hero-stat-num { font-size: 22px; }
}

/* ===== 板块通用 ===== */
.section { padding: 90px 0; }
.section-dark { background: var(--bg-dark); }
.section-light { background: var(--bg); }
.section-white { background: var(--bg-card); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--accent); font-size: 13px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 2px;
  margin-bottom: 12px;
}
.section-tag i { font-size: 12px; }
.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700; line-height: 1.2; letter-spacing: -0.8px;
  color: var(--text); margin-bottom: 16px;
}
.section-dark .section-title { color: var(--text-on-dark); }
.section-sub {
  font-size: 17px; color: var(--text-secondary);
  max-width: 560px; margin: 0 auto; line-height: 1.7;
}
.section-dark .section-sub { color: var(--text-on-dark-muted); }

@media (max-width: 768px) { .section { padding: 60px 0; } }

/* ===== 特色卡片 ===== */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card {
  background: var(--bg-card); border-radius: var(--radius);
  padding: 32px 24px; text-align: center;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
  transition: all var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
.feature-icon {
  width: 60px; height: 60px; border-radius: 16px;
  background: linear-gradient(135deg, rgba(201,168,76,0.08) 0%, rgba(201,168,76,0.02) 100%);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px; font-size: 26px; color: var(--accent);
  transition: all var(--transition);
}
.feature-card:hover .feature-icon { background: linear-gradient(135deg, rgba(201,168,76,0.18) 0%, rgba(201,168,76,0.06) 100%); transform: scale(1.04); }
.feature-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; color: var(--text); }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

@media (max-width: 1024px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .features-grid { grid-template-columns: 1fr; } }

/* ===== 服务分类 ===== */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.service-card {
  background: var(--bg-card); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}
.service-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.service-card-img {
  width: 100%; height: 180px; object-fit: cover;
  transition: transform 0.5s ease;
}
.service-card:hover .service-card-img { transform: scale(1.03); }
.service-card-body { padding: 22px 20px 24px; }
.service-card-body h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.service-card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; }
.service-tag {
  display: inline-block; padding: 3px 12px; border-radius: 20px;
  background: rgba(201,168,76,0.08); color: var(--accent);
  font-size: 12px; font-weight: 500;
}

@media (max-width: 1024px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .services-grid { grid-template-columns: 1fr; } }

/* ===== 最新资讯（CMS列表） ===== */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.news-card {
  display: flex; gap: 20px;
  background: var(--bg-card); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}
.news-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.news-thumb {
  width: 120px; height: 90px; border-radius: var(--radius-sm);
  object-fit: cover; flex-shrink: 0;
}
.news-info { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.news-cat {
  font-size: 11px; font-weight: 600; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 5px;
}
.news-info h3 { font-size: 16px; font-weight: 600; line-height: 1.4; margin-bottom: 6px; }
.news-info h3 a { color: var(--text); transition: color var(--transition); }
.news-info h3 a:hover { color: var(--accent); }
.news-info p { font-size: 13px; color: var(--text-secondary); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { font-size: 12px; color: var(--text-muted); margin-top: 6px; display: flex; gap: 14px; }
.news-empty {
  grid-column: 1 / -1; text-align: center; padding: 48px 20px;
  color: var(--text-muted); font-size: 15px;
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px dashed var(--border);
}

@media (max-width: 768px) {
  .news-grid { grid-template-columns: 1fr; }
  .news-card { flex-direction: column; }
  .news-thumb { width: 100%; height: 160px; }
}

/* ===== 数据统计 ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius); padding: 36px 20px;
  text-align: center; transition: all var(--transition);
}
.stat-card:hover { background: rgba(255,255,255,0.06); border-color: rgba(201,168,76,0.20); transform: translateY(-2px); }
.stat-icon { font-size: 32px; color: var(--accent); margin-bottom: 14px; }
.stat-number { font-size: 40px; font-weight: 800; color: var(--text-on-dark); letter-spacing: -1px; line-height: 1.1; }
.stat-label { font-size: 14px; color: var(--text-on-dark-muted); margin-top: 8px; }

@media (max-width: 900px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

/* ===== 使用流程 ===== */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.process-step {
  text-align: center; position: relative;
  background: var(--bg-card); border-radius: var(--radius);
  padding: 32px 18px; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}
.process-step:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.process-step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, #b8942e 100%);
  color: #0b1a30; font-weight: 700; font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px; box-shadow: 0 4px 16px var(--accent-glow);
}
.process-step h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.process-step p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.process-connector { display: none; }

@media (max-width: 1024px) { .process-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .process-grid { grid-template-columns: 1fr; } }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid var(--border-light); overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: var(--border); }
.faq-question {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; font-size: 16px; font-weight: 500;
  cursor: pointer; transition: background var(--transition);
  gap: 16px;
}
.faq-question:hover { background: rgba(201,168,76,0.02); }
.faq-question i { color: var(--accent); font-size: 14px; transition: transform var(--transition); flex-shrink: 0; }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px; color: var(--text-secondary); font-size: 15px; line-height: 1.7;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 22px; }

/* ===== CTA ===== */
.cta-section {
  background: var(--bg-dark);
  position: relative; overflow: hidden;
}
.cta-bg {
  position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.12;
}
.cta-inner { position: relative; z-index: 2; text-align: center; padding: 80px 0; }
.cta-inner h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 700; color: var(--text-on-dark); margin-bottom: 16px; }
.cta-inner p { font-size: 17px; color: var(--text-on-dark-muted); max-width: 520px; margin: 0 auto 32px; line-height: 1.7; }
.cta-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }

/* ===== Footer ===== */
.site-footer {
  background: #060b14; border-top: 1px solid rgba(255,255,255,0.04);
  padding: 56px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { font-size: 20px; margin-bottom: 14px; }
.footer-brand p { font-size: 14px; color: var(--text-on-dark-muted); line-height: 1.7; max-width: 320px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: var(--text-on-dark); margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: var(--text-on-dark-muted); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--accent-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 24px; display: flex;
  justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { font-size: 13px; color: var(--text-on-dark-muted); }
.footer-socials { display: flex; gap: 16px; }
.footer-socials a { color: var(--text-on-dark-muted); font-size: 18px; transition: color var(--transition); }
.footer-socials a:hover { color: var(--accent); }

@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.mt-12 { margin-top: 12px; }
.mt-24 { margin-top: 24px; }
.mb-12 { margin-bottom: 12px; }

/* ===== 响应式微调 ===== */
@media (max-width: 768px) {
  .section-header { margin-bottom: 36px; }
  .hero-actions .btn-primary, .hero-actions .btn-secondary { width: 100%; justify-content: center; }
}

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a4a;
            --secondary: #e85d3a;
            --secondary-light: #f07a5a;
            --accent: #f4a261;
            --bg: #ffffff;
            --bg-alt: #f8f9fc;
            --bg-dark: #0f1a4a;
            --text: #1a1a2e;
            --text-light: #5a5a7a;
            --text-white: #ffffff;
            --border: #e2e5f0;
            --border-light: #f0f2f8;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(26, 42, 108, 0.08);
            --shadow-hover: 0 12px 40px rgba(26, 42, 108, 0.16);
            --shadow-btn: 0 4px 14px rgba(232, 93, 58, 0.35);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--primary);
        }
        h1 {
            font-size: 2.4rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        p:last-child {
            margin-bottom: 0;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
        }
        .logo i {
            color: var(--secondary);
            font-size: 1.5rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-center {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.10);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--secondary);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 40px;
            padding: 0 16px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26, 42, 108, 0.10);
        }
        .search-box i {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-right: 8px;
        }
        .search-box input {
            padding: 8px 0;
            width: 140px;
            font-size: 0.9rem;
            color: var(--text);
            background: transparent;
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            color: #fff;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: var(--shadow-btn);
            transition: var(--transition);
            border: none;
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 93, 58, 0.45);
            color: #fff;
        }
        .btn-cta i {
            font-size: 0.85rem;
        }
        .menu-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--primary);
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        /* ===== Hero / Banner (内页) ===== */
        .page-banner {
            padding: 120px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 80px;
            background: var(--bg);
            clip-path: ellipse(70% 100% at 50% 100%);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            color: var(--text-white);
            font-size: 2.6rem;
            max-width: 800px;
            margin: 0 auto 12px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.20);
        }
        .page-banner .meta-line {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.80);
            font-size: 0.95rem;
        }
        .page-banner .meta-line span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .page-banner .meta-line i {
            color: var(--accent);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-bottom: 16px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.70);
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.40);
        }

        /* ===== Main Content ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .article-body .featured-image {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 32px;
            width: 100%;
            max-height: 480px;
            object-fit: cover;
            background: var(--bg-alt);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .content p {
            margin-bottom: 1.2rem;
            color: var(--text);
        }
        .article-body .content h2,
        .article-body .content h3,
        .article-body .content h4 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }
        .article-body .content ul,
        .article-body .content ol {
            margin-bottom: 1.2rem;
            padding-left: 1.5rem;
        }
        .article-body .content ul li,
        .article-body .content ol li {
            margin-bottom: 0.5rem;
            color: var(--text);
            list-style: disc;
        }
        .article-body .content ol li {
            list-style: decimal;
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--secondary);
            background: var(--bg-alt);
            padding: 16px 24px;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body .content a {
            color: var(--secondary);
            text-decoration: underline;
        }
        .article-body .content a:hover {
            color: var(--primary);
        }
        .article-body .content img {
            border-radius: var(--radius-sm);
            margin: 1.5rem auto;
        }
        .article-footer-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-alt);
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-light);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .tag i {
            font-size: 0.75rem;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h3 i {
            color: var(--secondary);
        }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child {
            border-bottom: none;
        }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.95rem;
            color: var(--text);
            font-weight: 500;
        }
        .sidebar-list a:hover {
            color: var(--secondary);
        }
        .sidebar-list a .num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-light);
            flex-shrink: 0;
        }
        .sidebar-list a:hover .num {
            background: var(--secondary);
            color: #fff;
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--text-white);
            text-align: center;
        }
        .sidebar-cta h3 {
            color: var(--text-white);
        }
        .sidebar-cta h3 i {
            color: var(--accent);
        }
        .sidebar-cta p {
            color: rgba(255, 255, 255, 0.80);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }
        .sidebar-cta .btn-cta {
            background: var(--secondary);
            box-shadow: 0 4px 20px rgba(232, 93, 58, 0.40);
        }
        .sidebar-cta .btn-cta:hover {
            background: var(--secondary-light);
        }

        /* ===== Related ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-alt);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-title h2 {
            font-size: 1.8rem;
        }
        .related-section .section-title p {
            color: var(--text-light);
            font-size: 1rem;
            margin-top: 8px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--bg-alt);
        }
        .related-card .card-body {
            padding: 20px 24px 24px;
        }
        .related-card .card-body h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-light);
        }
        .related-card .card-meta .cat {
            background: var(--bg-alt);
            padding: 2px 12px;
            border-radius: 40px;
            font-weight: 500;
            color: var(--primary);
        }

        /* ===== CTA Section ===== */
        .article-cta {
            padding: 60px 0;
            background: var(--bg);
        }
        .article-cta .cta-box {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .article-cta .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .article-cta .cta-box h2 {
            color: var(--text-white);
            font-size: 2rem;
            margin-bottom: 12px;
            position: relative;
        }
        .article-cta .cta-box p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 28px;
            position: relative;
        }
        .article-cta .cta-box .btn-cta {
            background: var(--secondary);
            font-size: 1rem;
            padding: 14px 36px;
            position: relative;
        }
        .article-cta .cta-box .btn-cta:hover {
            background: var(--secondary-light);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-brand .logo i {
            color: var(--secondary);
        }
        .footer-brand .logo span {
            -webkit-text-fill-color: #fff;
            background: none;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.92rem;
            max-width: 320px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.85rem;
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.60);
            transition: var(--transition);
            font-size: 1rem;
        }
        .footer-socials a:hover {
            background: var(--secondary);
            color: #fff;
        }

        /* ===== 文章不存在 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 24px;
            opacity: 0.5;
        }
        .not-found-box h2 {
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .not-found-box p {
            font-size: 1.1rem;
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .not-found-box .btn-cta {
            display: inline-flex;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .nav-center {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
            }
            .nav-center.open {
                display: flex;
            }
            .nav-link {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-link.active::after {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .search-box {
                display: none;
            }
            .btn-cta {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .page-banner {
                padding: 100px 0 40px;
                min-height: 200px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .article-body {
                padding: 24px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .article-cta .cta-box {
                padding: 36px 24px;
            }
            .article-cta .cta-box h2 {
                font-size: 1.5rem;
            }
            .sidebar-card {
                padding: 20px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner .meta-line {
                font-size: 0.82rem;
                gap: 12px;
            }
            .article-body {
                padding: 16px;
            }
            .article-body .content {
                font-size: 0.98rem;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
            .btn-cta {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .btn-cta i {
                display: none;
            }
            .related-card .card-img {
                height: 160px;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
    :root {
      --primary: #1a2a6c;
      --primary-light: #3a4a9c;
      --primary-dark: #0f1a4a;
      --secondary: #e8b830;
      --secondary-light: #f0d060;
      --secondary-dark: #c89a20;
      --accent: #ff6b35;
      --bg-body: #f8f9fc;
      --bg-card: #ffffff;
      --bg-dark: #0f1a4a;
      --bg-light: #f0f2f8;
      --text-primary: #1a1a2e;
      --text-secondary: #4a4a6a;
      --text-muted: #8888aa;
      --text-white: #ffffff;
      --text-dark: #0f1a4a;
      --border: #e2e4f0;
      --border-light: #f0f2f8;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-xl: 28px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
      --shadow-xl: 0 30px 80px rgba(0, 0, 0, 0.12);
      --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      --transition: 0.25s cubic-bezier(0.2, 0, 0, 1);
      --space-xs: 4px;
      --space-sm: 8px;
      --space-md: 16px;
      --space-lg: 32px;
      --space-xl: 48px;
      --space-2xl: 64px;
      --space-3xl: 96px;
      --max-width: 1200px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
    body {
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.65;
      color: var(--text-primary);
      background: var(--bg-body);
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; transition: color var(--transition); }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
    h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
    h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
    h3 { font-size: clamp(1.2rem, 2.2vw, 1.6rem); }
    h4 { font-size: 1.1rem; }
    p { margin-bottom: 1rem; color: var(--text-secondary); }
    .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-lg); }
    .section-padding { padding: var(--space-3xl) 0; }
    .section-title { text-align: center; margin-bottom: var(--space-xl); }
    .section-title h2 { margin-bottom: var(--space-sm); }
    .section-title p { max-width: 640px; margin: 0 auto; color: var(--text-muted); font-size: 1.1rem; }
    .text-center { text-align: center; }
    .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex; align-items: center; gap: var(--space-sm);
      padding: 12px 28px; border-radius: 50px; font-weight: 600;
      font-size: 0.95rem; border: none; cursor: pointer;
      transition: all var(--transition); white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary); color: var(--text-white);
      box-shadow: 0 4px 14px rgba(26, 42, 108, 0.25);
    }
    .btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(26, 42, 108, 0.35); }
    .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(26, 42, 108, 0.2); }
    .btn-primary:focus { outline: 3px solid var(--secondary-light); outline-offset: 2px; }
    .btn-secondary {
      background: var(--secondary); color: var(--text-dark);
      box-shadow: 0 4px 14px rgba(232, 184, 48, 0.3);
    }
    .btn-secondary:hover { background: var(--secondary-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(232, 184, 48, 0.4); }
    .btn-secondary:active { transform: translateY(0); }
    .btn-outline {
      background: transparent; color: var(--primary); border: 2px solid var(--primary);
    }
    .btn-outline:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }
    .btn-lg { padding: 16px 36px; font-size: 1.05rem; }
    .btn-sm { padding: 8px 18px; font-size: 0.85rem; }

    /* ===== Header / Navigation (SaaS Command Bar Style) ===== */
    .site-header {
      position: sticky; top: 0; z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(18px) saturate(1.2);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 1px 4px rgba(0,0,0,0.02);
    }
    .header-inner {
      display: flex; align-items: center; justify-content: space-between;
      height: 68px; max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-lg);
      gap: var(--space-lg);
    }
    .logo {
      display: flex; align-items: center; gap: 10px; font-size: 1.25rem;
      font-weight: 700; color: var(--primary); white-space: nowrap;
    }
    .logo i { color: var(--secondary); font-size: 1.4rem; }
    .logo span { letter-spacing: -0.3px; }

    .nav-center { display: flex; align-items: center; gap: var(--space-xs); }
    .nav-link {
      padding: 8px 18px; border-radius: 50px; font-weight: 500;
      font-size: 0.9rem; color: var(--text-secondary);
      transition: all var(--transition); position: relative;
    }
    .nav-link:hover { color: var(--primary); background: var(--bg-light); }
    .nav-link.active {
      color: var(--text-white); background: var(--primary);
      box-shadow: 0 2px 10px rgba(26, 42, 108, 0.15);
    }
    .nav-link.active:hover { background: var(--primary-light); }

    .header-actions {
      display: flex; align-items: center; gap: var(--space-sm);
    }
    .search-toggle {
      width: 40px; height: 40px; border-radius: 50%;
      display: flex; align-items: center; justify-content: center;
      background: var(--bg-light); border: none; cursor: pointer;
      color: var(--text-secondary); font-size: 1rem;
      transition: all var(--transition);
    }
    .search-toggle:hover { background: var(--border); color: var(--primary); }

    /* Mobile hamburger */
    .hamburger {
      display: none; flex-direction: column; gap: 5px;
      width: 28px; height: 28px; justify-content: center;
      background: none; border: none; cursor: pointer; padding: 0;
    }
    .hamburger span {
      display: block; width: 100%; height: 2.5px; border-radius: 4px;
      background: var(--text-primary); transition: all var(--transition);
    }
    .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    /* Mobile drawer */
    .mobile-drawer {
      display: none; position: fixed; top: 68px; left: 0; right: 0;
      background: rgba(255,255,255,0.98); backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border); padding: var(--space-lg);
      box-shadow: var(--shadow-lg); z-index: 99;
      max-height: calc(100vh - 68px); overflow-y: auto;
    }
    .mobile-drawer.open { display: block; }
    .mobile-drawer .nav-link {
      display: block; padding: 12px 16px; font-size: 1rem; border-radius: var(--radius-sm);
    }
    .mobile-drawer .nav-link.active { background: var(--primary); color: #fff; }

    /* ===== Hero / Banner (Inner Page) ===== */
    .page-banner {
      position: relative; padding: var(--space-3xl) 0 var(--space-xl);
      background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
      overflow: hidden; min-height: 280px;
      display: flex; align-items: center;
    }
    .page-banner::before {
      content: ''; position: absolute; inset: 0;
      background-image: url('/assets/images/backpic/back-2.png');
      background-size: cover; background-position: center;
      opacity: 0.12; mix-blend-mode: overlay;
    }
    .page-banner::after {
      content: ''; position: absolute; bottom: 0; left: 0; right: 0;
      height: 80px; background: linear-gradient(to top, var(--bg-body), transparent);
    }
    .banner-content { position: relative; z-index: 2; color: var(--text-white); }
    .banner-content h1 { color: var(--text-white); margin-bottom: var(--space-sm); font-weight: 800; }
    .banner-content p { color: rgba(255,255,255,0.8); max-width: 600px; font-size: 1.1rem; margin-bottom: 0; }
    .banner-breadcrumb { display: flex; gap: var(--space-sm); align-items: center; font-size: 0.9rem; margin-bottom: var(--space-md); color: rgba(255,255,255,0.6); }
    .banner-breadcrumb a { color: rgba(255,255,255,0.7); }
    .banner-breadcrumb a:hover { color: var(--secondary); }
    .banner-breadcrumb span { color: var(--secondary); }

    /* ===== Card Grid ===== */
    .card-grid {
      display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
      gap: var(--space-lg);
    }
    .card {
      background: var(--bg-card); border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm); border: 1px solid var(--border);
      overflow: hidden; transition: all var(--transition);
    }
    .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
    .card-image { width: 100%; height: 200px; object-fit: cover; }
    .card-body { padding: var(--space-lg); }
    .card-body h3 { margin-bottom: var(--space-sm); }
    .card-body p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: var(--space-md); }
    .card-meta { display: flex; align-items: center; gap: var(--space-md); font-size: 0.85rem; color: var(--text-muted); }
    .card-tag {
      display: inline-block; padding: 2px 12px; border-radius: 50px;
      background: var(--bg-light); color: var(--primary); font-size: 0.8rem;
      font-weight: 600; border: 1px solid var(--border);
    }

    /* ===== Guide Section (Tab / Step) ===== */
    .guide-steps {
      display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: var(--space-lg); counter-reset: step;
    }
    .guide-step {
      background: var(--bg-card); border-radius: var(--radius-md);
      padding: var(--space-xl); border: 1px solid var(--border);
      box-shadow: var(--shadow-sm); position: relative;
      transition: all var(--transition); counter-increment: step;
    }
    .guide-step:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
    .guide-step::before {
      content: counter(step); position: absolute; top: var(--space-lg); right: var(--space-lg);
      width: 40px; height: 40px; border-radius: 50%;
      background: var(--bg-light); color: var(--primary);
      display: flex; align-items: center; justify-content: center;
      font-weight: 800; font-size: 1.2rem;
    }
    .guide-step .step-icon { font-size: 2rem; color: var(--primary); margin-bottom: var(--space-md); }
    .guide-step h3 { margin-bottom: var(--space-sm); font-size: 1.15rem; }
    .guide-step p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 0; }

    /* ===== Feature Blocks ===== */
    .feature-blocks {
      display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: var(--space-lg);
    }
    .feature-block {
      background: var(--bg-card); border-radius: var(--radius-md);
      padding: var(--space-xl); border: 1px solid var(--border);
      box-shadow: var(--shadow-sm); text-align: center;
      transition: all var(--transition);
    }
    .feature-block:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
    .feature-block .f-icon {
      width: 60px; height: 60px; border-radius: var(--radius-md);
      background: var(--bg-light); color: var(--primary);
      display: flex; align-items: center; justify-content: center;
      margin: 0 auto var(--space-md); font-size: 1.6rem;
      transition: all var(--transition);
    }
    .feature-block:hover .f-icon { background: var(--primary); color: #fff; }
    .feature-block h3 { margin-bottom: var(--space-sm); font-size: 1.1rem; }
    .feature-block p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 0; }

    /* ===== FAQ ===== */
    .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: var(--space-sm); }
    .faq-item {
      background: var(--bg-card); border: 1px solid var(--border);
      border-radius: var(--radius-md); overflow: hidden;
      transition: all var(--transition);
    }
    .faq-item:hover { border-color: var(--primary-light); }
    .faq-question {
      width: 100%; display: flex; align-items: center; justify-content: space-between;
      padding: var(--space-lg); background: none; border: none;
      font-weight: 600; font-size: 1rem; color: var(--text-primary);
      cursor: pointer; text-align: left; transition: all var(--transition);
    }
    .faq-question i { transition: transform var(--transition); color: var(--primary); }
    .faq-item.open .faq-question i { transform: rotate(180deg); }
    .faq-answer {
      max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
      padding: 0 var(--space-lg);
    }
    .faq-item.open .faq-answer { max-height: 300px; padding: 0 var(--space-lg) var(--space-lg); }
    .faq-answer p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 0; }

    /* ===== CTA ===== */
    .cta-section {
      background: linear-gradient(135deg, var(--primary-dark), var(--primary));
      position: relative; overflow: hidden;
    }
    .cta-section::before {
      content: ''; position: absolute; inset: 0;
      background-image: url('/assets/images/backpic/back-3.png');
      background-size: cover; background-position: center;
      opacity: 0.08; mix-blend-mode: overlay;
    }
    .cta-content { position: relative; z-index: 2; text-align: center; padding: var(--space-2xl) 0; }
    .cta-content h2 { color: #fff; margin-bottom: var(--space-sm); }
    .cta-content p { color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto var(--space-lg); }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--bg-dark); color: rgba(255,255,255,0.7);
      padding: var(--space-2xl) 0 var(--space-lg);
    }
    .site-footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-lg); }
    .footer-grid {
      display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: var(--space-xl); margin-bottom: var(--space-xl);
    }
    .footer-brand .logo { color: #fff; font-size: 1.2rem; margin-bottom: var(--space-sm); display: inline-flex; }
    .footer-brand .logo i { color: var(--secondary); }
    .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); max-width: 300px; margin-top: var(--space-sm); }
    .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: var(--space-md); font-weight: 600; }
    .footer-col ul li { margin-bottom: var(--space-sm); }
    .footer-col ul li a { font-size: 0.9rem; color: rgba(255,255,255,0.55); transition: all var(--transition); }
    .footer-col ul li a:hover { color: var(--secondary); padding-left: 4px; }
    .footer-bottom {
      display: flex; align-items: center; justify-content: space-between;
      padding-top: var(--space-lg); border-top: 1px solid rgba(255,255,255,0.08);
      flex-wrap: wrap; gap: var(--space-md);
    }
    .footer-bottom p { font-size: 0.85rem; color: rgba(255,255,255,0.4); margin-bottom: 0; }
    .footer-socials { display: flex; gap: var(--space-md); }
    .footer-socials a {
      width: 38px; height: 38px; border-radius: 50%;
      background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.5);
      display: flex; align-items: center; justify-content: center;
      transition: all var(--transition); font-size: 1.1rem;
    }
    .footer-socials a:hover { background: var(--secondary); color: var(--text-dark); transform: scale(1.1); }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .guide-steps { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .header-inner { height: 60px; }
      .nav-center { display: none; }
      .hamburger { display: flex; }
      .header-actions .btn { display: none; }
      .page-banner { min-height: 200px; padding: var(--space-xl) 0; }
      .footer-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
      .guide-steps { grid-template-columns: 1fr; }
      .card-grid { grid-template-columns: 1fr; }
      .feature-blocks { grid-template-columns: 1fr; }
      .section-padding { padding: var(--space-xl) 0; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }
    @media (max-width: 520px) {
      .container { padding: 0 var(--space-md); }
      .header-inner { padding: 0 var(--space-md); }
      .banner-content h1 { font-size: 1.6rem; }
      .banner-content p { font-size: 0.95rem; }
      .btn-lg { padding: 12px 24px; font-size: 0.95rem; }
    }

    /* ===== Utility ===== */
    .mt-1 { margin-top: var(--space-md); }
    .mt-2 { margin-top: var(--space-lg); }
    .mb-1 { margin-bottom: var(--space-md); }
    .mb-2 { margin-bottom: var(--space-lg); }
    .gap-1 { gap: var(--space-md); }
    .gap-2 { gap: var(--space-lg); }
    .flex-center { display: flex; align-items: center; justify-content: center; }
    .flex-wrap { flex-wrap: wrap; }

    /* Smooth reveal */
    .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }