/* roulang page: index */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --secondary: #f97316;
  --secondary-light: #ffedd5;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 22px;
  --shadow: 0 4px 18px rgba(17, 24, 39, 0.06);
  --shadow-hover: 0 10px 32px rgba(17, 24, 39, 0.10);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; height: auto; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.section { padding: 88px 0; position: relative; }

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 52px;
}
.section-head h2 { font-size: 36px; font-weight: 700; letter-spacing: 1px; margin-bottom: 12px; line-height: 1.3; color: var(--text); }
.section-head p { font-size: 16px; color: var(--text-light); line-height: 1.8; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 40px;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 26px;
  border-radius: 40px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  line-height: 1.2;
}
.btn:focus-visible { outline: 3px solid rgba(37, 99, 235, 0.35); outline-offset: 3px; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 16px rgba(37, 99, 235, 0.28); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 3px 10px rgba(37, 99, 235, 0.25); }
.btn-outline-light { border-color: rgba(255,255,255,0.7); color: #fff; background: transparent; }
.btn-outline-light:hover { border-color: #fff; background: rgba(255,255,255,0.12); color: #fff; transform: translateY(-2px); }
.btn-secondary { background: var(--secondary); color: #fff; box-shadow: 0 4px 16px rgba(249, 115, 22, 0.3); }
.btn-secondary:hover { background: #ea580c; color: #fff; transform: translateY(-2px); }
.btn-lg { padding: 15px 36px; font-size: 16px; }
.btn-block { width: 100%; }

/* Header / Nav */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(244,247,251,0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226,232,240,0.5);
}
.nav-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 8px 22px;
  background: rgba(255,255,255,0.92);
  border-radius: 18px;
  box-shadow: 0 4px 20px rgba(17,24,39,0.06);
  margin-top: 14px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.85);
  position: relative;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.5px;
}
.logo:hover { color: var(--primary); }
.logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--primary), #1e40af);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 17px;
  box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 9px 18px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-light);
  transition: var(--transition);
  position: relative;
}
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: var(--primary); background: var(--primary-light); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: 4px; left: 50%;
  transform: translateX(-50%);
  width: 20px; height: 3px;
  background: var(--primary);
  border-radius: 4px;
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
}
.mobile-toggle:hover { background: var(--bg); }

/* Hero */
.hero {
  position: relative;
  padding: 170px 0 110px;
  overflow: hidden;
  color: #fff;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(15,23,42,0.82) 0%, rgba(30,64,175,0.72) 55%, rgba(37,99,235,0.45) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}
.hero-text { max-width: 620px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 40px;
  letter-spacing: 0.5px;
  margin-bottom: 22px;
}
.hero-text h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 1px;
  margin-bottom: 20px;
}
.hero-text p {
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255,255,255,0.88);
  margin-bottom: 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 34px; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 22px; font-size: 14px; color: rgba(255,255,255,0.8); }
.hero-trust span { display: inline-flex; align-items: center; gap: 7px; }
.hero-trust i { color: #fbbf24; }
.hero-card { display: flex; justify-content: flex-end; }
.login-widget {
  width: 100%;
  max-width: 420px;
  background: rgba(255,255,255,0.96);
  border-radius: 24px;
  padding: 34px;
  box-shadow: 0 20px 60px rgba(15,23,42,0.35);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.8);
}
.login-widget-header { display: flex; align-items: center; gap: 14px; margin-bottom: 26px; }
.widget-icon {
  width: 52px; height: 52px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}
.login-widget-header h3 { font-size: 18px; font-weight: 700; color: var(--text); }
.login-widget-header p { font-size: 13px; color: var(--text-light); }
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 7px; }
.form-field input {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: #f8fafc;
  transition: var(--transition);
}
.form-field input:focus { outline: none; border-color: var(--primary); background: #fff; box-shadow: 0 0 0 4px rgba(37,99,235,0.1); }
.login-widget-footer { display: flex; justify-content: space-between; margin-top: 16px; font-size: 13px; }
.login-widget-footer a { color: var(--text-light); }
.login-widget-footer a:hover { color: var(--primary); }

/* Feature Cards */
.features { background: var(--bg); border-bottom: 1px solid var(--border); }
.grid { display: grid; gap: 28px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.feature-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(226,232,240,0.6);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), #60a5fa);
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}
.feature-icon.blue { background: var(--primary-light); color: var(--primary); }
.feature-icon.orange { background: var(--secondary-light); color: var(--secondary); }
.feature-icon.green { background: #d1fae5; color: #059669; }
.feature-icon.purple { background: #ede9fe; color: #7c3aed; }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.75; }

/* Category Cards */
.category-section { background: var(--surface); }
.category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.category-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.category-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.category-img { height: 230px; overflow: hidden; position: relative; }
.category-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.category-card:hover .category-img img { transform: scale(1.05); }
.category-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,0.4), transparent 60%);
}
.category-body { padding: 30px; flex: 1; display: flex; flex-direction: column; }
.category-body h3 { font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.category-body p { font-size: 14px; color: var(--text-light); line-height: 1.8; margin-bottom: 20px; flex: 1; }
.category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  color: var(--primary);
}
.category-link i { transition: transform 0.3s ease; }
.category-card:hover .category-link i { transform: translateX(5px); }

/* Steps */
.steps-section { background: var(--bg); }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; }
.step-item { text-align: center; padding: 30px 20px; position: relative; }
.step-number {
  width: 60px; height: 60px;
  margin: 0 auto 18px;
  background: linear-gradient(135deg, var(--primary), #1e40af);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(37,99,235,0.3);
  position: relative;
  z-index: 2;
}
.step-item h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.step-item p { font-size: 14px; color: var(--text-light); line-height: 1.7; }
.step-line {
  position: absolute;
  top: 60px; left: 50%;
  width: 100%;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--primary) 0 8px, transparent 8px 16px);
  opacity: 0.3;
  z-index: 1;
  transform: translateX(0);
}

/* Stats */
.stats-section {
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: #fff;
  padding: 70px 0;
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: "";
  position: absolute;
  top: -50%; right: -10%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.1), transparent 70%);
  border-radius: 50%;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; position: relative; z-index: 2; }
.stat-block { padding: 20px; }
.stat-number { font-size: 44px; font-weight: 800; line-height: 1.2; margin-bottom: 6px; }
.stat-label { font-size: 15px; color: rgba(255,255,255,0.78); }
.stat-icon { font-size: 24px; margin-bottom: 12px; color: #93c5fd; }

/* Latest Info */
.info-section { background: var(--surface); }
.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.info-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid transparent;
  transition: var(--transition);
}
.info-card:hover { border-color: var(--primary); background: #fff; box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.info-card-body { display: flex; flex-direction: column; height: 100%; }
.info-card h3 { font-size: 17px; font-weight: 700; margin: 12px 0 10px; line-height: 1.5; }
.info-card h3 a { color: var(--text); }
.info-card h3 a:hover { color: var(--primary); }
.info-card p { font-size: 14px; color: var(--text-light); line-height: 1.75; margin-bottom: 16px; flex: 1; }
.info-footer { display: flex; align-items: center; justify-content: space-between; margin-top: auto; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 30px;
  font-size: 12px;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
}
.badge.orange { background: var(--secondary-light); color: var(--secondary); }
.badge.green { background: #d1fae5; color: #059669; }
.info-date { font-size: 13px; color: var(--text-light); display: inline-flex; align-items: center; gap: 6px; }
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 30px;
  background: var(--bg);
  border-radius: var(--radius);
  color: var(--text-light);
  font-size: 16px;
}

/* FAQ */
.faq-section { background: var(--bg); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--primary); transition: transform 0.3s ease; flex-shrink: 0; }
.faq-item[open] summary { color: var(--primary); border-bottom: 1px solid var(--border); }
.faq-item[open] summary i { transform: rotate(180deg); }
.faq-item .faq-answer { padding: 18px 28px; font-size: 15px; color: var(--text-light); line-height: 1.85; }

/* CTA */
.cta-section { padding: 70px 0; background: var(--surface); position: relative; }
.cta-box {
  background: linear-gradient(120deg, #1e3a8a, #1d4ed8);
  border-radius: 28px;
  padding: 60px 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 50px rgba(30,58,138,0.4);
}
.cta-box::before {
  content: "";
  position: absolute;
  top: -40px; right: -30px;
  width: 220px; height: 220px;
  border-radius: 50%;
  background: rgba(255,255,255,0.07);
}
.cta-box::after {
  content: "";
  position: absolute;
  bottom: -50px; left: 20%;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
}
.cta-content h2 { font-size: 32px; font-weight: 700; margin-bottom: 10px; }
.cta-content p { font-size: 16px; color: rgba(255,255,255,0.82); }
.cta-actions { display: flex; gap: 14px; flex-shrink: 0; position: relative; z-index: 2; }

/* Footer */
.site-footer { background: #0f172a; color: rgba(255,255,255,0.72); padding: 0; }
.footer-main { padding: 64px 0 40px; display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; }
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.8; max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 20px; }
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  padding: 6px 0;
  transition: var(--transition);
}
.footer-col a:hover { color: #fff; padding-left: 5px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom a { color: rgba(255,255,255,0.5); margin-left: 10px; }
.footer-bottom a:hover { color: #fff; }

/* Responsive */
@media (max-width: 1024px) {
  .hero-text h1 { font-size: 40px; }
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-card { justify-content: center; }
  .login-widget { max-width: 480px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .cta-box { flex-direction: column; text-align: center; padding: 45px 30px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 28px; }
  .nav-panel { padding: 10px 16px; }
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0; right: 0;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow-hover);
    border: 1px solid var(--border);
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 18px; border-radius: 10px; }
  .nav-links a.active::after { display: none; }
  .mobile-toggle { display: block; }
  .grid-4 { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; gap: 20px; }
  .step-line { display: none; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .stat-number { font-size: 34px; }
  .info-grid { grid-template-columns: 1fr; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .hero-actions { width: 100%; }
  .hero-actions .btn { width: 100%; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero { padding: 140px 0 70px; }
  .hero-text h1 { font-size: 32px; }
  .hero-text p { font-size: 15px; }
  .hero-trust { gap: 12px; font-size: 13px; }
  .stats-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .logo { font-size: 16px; }
  .logo-icon { width: 34px; height: 34px; font-size: 14px; }
}

/* roulang page: article */
:root {
            --primary: #2d6ff7;
            --primary-dark: #1a56db;
            --primary-light: #eaf1fe;
            --secondary: #ff8a3d;
            --secondary-light: #fff1e8;
            --bg: #f6f8fc;
            --surface: #ffffff;
            --text: #1e293b;
            --text-body: #3d4d63;
            --text-weak: #7b8ba3;
            --border: #e5ecf3;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(30, 41, 59, 0.07);
            --shadow-hover: 0 18px 44px rgba(30, 41, 59, 0.13);
            --transition: all 0.3s ease;
            --container-w: 1200px;
            --header-h: 76px;
        }

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

        html { scroll-behavior: smooth; }

        body {
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; border: 0; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; line-height: inherit; }

        h1, h2, h3, h4, h5, h6 {
            margin: 0 0 16px;
            color: var(--text);
            font-weight: 700;
            line-height: 1.35;
        }

        .container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }

        .row { margin: 0 -15px; }
        .column { padding: 0 15px; }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(30, 41, 59, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: var(--header-h);
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.4px;
            flex-shrink: 0;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary), #5b9bff);
            color: #fff;
            border-radius: 12px;
            font-size: 1.1rem;
            box-shadow: 0 6px 16px rgba(45, 111, 247, 0.28);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-links a {
            padding: 10px 20px;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-weak);
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-links a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
            border-color: rgba(45, 111, 247, 0.16);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 0;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            cursor: pointer;
            color: var(--text);
            font-size: 1.2rem;
            transition: var(--transition);
        }

        .nav-toggle:hover { background: var(--primary-light); color: var(--primary); }

        .page-hero {
            position: relative;
            padding: 64px 0 56px;
            background-size: cover;
            background-position: center;
            background-color: #16304d;
            isolation: isolate;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(10, 30, 58, 0.88), rgba(20, 52, 95, 0.72));
            z-index: -1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 18px;
        }

        .breadcrumb a { color: rgba(255, 255, 255, 0.8); }
        .breadcrumb a:hover { color: #fff; }
        .breadcrumb i { font-size: 0.7rem; }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 6px 18px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 500;
            backdrop-filter: blur(6px);
            margin-bottom: 16px;
        }

        .hero-badge i { color: var(--secondary); }

        .page-hero h1 {
            color: #fff;
            font-size: clamp(1.7rem, 3.4vw, 2.75rem);
            font-weight: 800;
            line-height: 1.3;
            max-width: 780px;
            margin: 0 0 18px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }

        .hero-meta {
            display: flex;
            align-items: center;
            gap: 22px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.92rem;
        }

        .hero-meta span { display: inline-flex; align-items: center; gap: 7px; }

        .hero-meta i { color: var(--secondary); }

        .article-main { padding: 60px 0 70px; }

        .article-body-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 44px;
            position: relative;
            overflow: hidden;
        }

        .article-meta-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            padding-bottom: 22px;
            margin-bottom: 30px;
            border-bottom: 1px solid var(--border);
        }

        .badge-primary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            border: 1px solid rgba(45, 111, 247, 0.12);
        }

        .meta-time {
            color: var(--text-weak);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-content {
            font-size: 1.02rem;
            color: var(--text-body);
            line-height: 1.95;
        }

        .article-content p { margin: 0 0 22px; }

        .article-content h2 {
            font-size: 1.5rem;
            margin: 38px 0 16px;
            padding-left: 16px;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 1.2rem;
            margin: 28px 0 12px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 22px;
            padding-left: 22px;
        }

        .article-content ul li,
        .article-content ol li { margin-bottom: 8px; }

        .article-content img {
            border-radius: 12px;
            margin: 28px 0;
            box-shadow: var(--shadow);
        }

        .article-content blockquote {
            margin: 28px 0;
            padding: 20px 26px;
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            border-radius: 0 12px 12px 0;
            color: var(--text);
            font-style: normal;
        }

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

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

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 26px;
            border-top: 1px solid var(--border);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #f3f6fb;
            color: var(--text);
            font-size: 0.85rem;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 999px;
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: default;
        }

        .tag:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(45, 111, 247, 0.2);
        }

        .not-found {
            text-align: center;
            padding: 50px 20px;
        }

        .not-found-icon {
            width: 84px;
            height: 84px;
            margin: 0 auto 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            border-radius: 50%;
            font-size: 2rem;
            color: var(--primary);
        }

        .not-found h2 {
            font-size: 1.7rem;
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--text-weak);
            margin-bottom: 28px;
            max-width: 420px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 13px 32px;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 8px 20px rgba(45, 111, 247, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(45, 111, 247, 0.35);
        }

        .btn-primary:focus-visible,
        .nav-links a:focus-visible,
        .nav-toggle:focus-visible {
            outline: 3px solid rgba(45, 111, 247, 0.4);
            outline-offset: 2px;
        }

        .sidebar-sticky { position: sticky; top: 96px; }

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

        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h3::after {
            content: "";
            flex: 1;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), transparent);
        }

        .sidebar-card h3 i { color: var(--primary); }

        .info-list { list-style: none; margin: 0; padding: 0; }

        .info-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.92rem;
        }

        .info-list li:last-child { border-bottom: 0; padding-bottom: 0; }

        .info-list li .icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            border-radius: 10px;
            color: var(--primary);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .info-list li .info-label { display: block; font-size: 0.8rem; color: var(--text-weak); }
        .info-list li .info-value { display: block; font-weight: 600; color: var(--text); font-size: 0.92rem; }

        .sidebar-links { list-style: none; margin: 0; padding: 0; }

        .sidebar-links li { margin-bottom: 2px; }

        .sidebar-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: 10px;
            color: var(--text-body);
            font-size: 0.92rem;
            transition: var(--transition);
        }

        .sidebar-links a i {
            font-size: 0.8rem;
            color: var(--text-weak);
            transition: var(--transition);
        }

        .sidebar-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
            padding-left: 18px;
        }

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

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-cloud .tag { cursor: pointer; }

        .related-section { padding: 70px 0 60px; background: var(--surface); border-top: 1px solid var(--border); }

        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }

        .section-label {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 1px;
            padding: 6px 18px;
            border-radius: 999px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .section-header h2 {
            font-size: clamp(1.5rem, 2.6vw, 2.1rem);
            font-weight: 800;
            letter-spacing: -0.4px;
            margin-bottom: 8px;
        }

        .section-header p { color: var(--text-weak); max-width: 520px; margin: 0 auto; }

        .related-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(45, 111, 247, 0.2);
        }

        .related-card .card-img { position: relative; overflow: hidden; aspect-ratio: 16 / 10; }

        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .related-card:hover .card-img img { transform: scale(1.06); }

        .card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(10, 25, 45, 0.4));
        }

        .related-card .card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }

        .related-card .card-cat {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .related-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            line-height: 1.55;
            margin-bottom: 10px;
        }

        .related-card h3 a { color: var(--text); }
        .related-card h3 a:hover { color: var(--primary); }

        .related-card .card-desc {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .faq-section { padding: 70px 0; }

        .faq-list { max-width: 820px; margin: 0 auto; }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 24px 28px;
            margin-bottom: 16px;
            transition: var(--transition);
            box-shadow: 0 2px 8px rgba(30, 41, 59, 0.03);
        }

        .faq-item:hover {
            box-shadow: var(--shadow);
            border-color: rgba(45, 111, 247, 0.22);
        }

        .faq-item h3 {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 1.02rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .faq-item h3 i {
            color: var(--primary);
            margin-top: 3px;
            font-size: 0.95rem;
            flex-shrink: 0;
        }

        .faq-item p {
            margin: 0;
            padding-left: 28px;
            color: var(--text-weak);
            font-size: 0.94rem;
            line-height: 1.75;
        }

        .cta-section {
            padding: 60px 0 70px;
            position: relative;
            background-size: cover;
            background-position: center;
            background-color: #142b47;
            isolation: isolate;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 35, 63, 0.92), rgba(30, 64, 108, 0.82));
            z-index: -1;
        }

        .cta-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 24px;
            padding: 50px 44px;
            text-align: center;
            max-width: 760px;
            margin: 0 auto;
        }

        .cta-card h2 {
            color: #fff;
            font-size: clamp(1.4rem, 2.4vw, 1.8rem);
            font-weight: 800;
            margin-bottom: 10px;
        }

        .cta-card p {
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 30px;
            font-size: 1rem;
        }

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

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--text);
            padding: 12px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
            background: var(--primary-light);
            color: var(--primary);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.4);
            padding: 12px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .site-footer {
            background: #0f1f35;
            color: rgba(255, 255, 255, 0.65);
            padding: 56px 0 0;
        }

        .footer-main {
            display: flex;
            justify-content: space-between;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            flex-wrap: wrap;
        }

        .footer-brand {
            max-width: 340px;
            flex: 1;
            min-width: 260px;
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand .logo-icon {
            background: linear-gradient(135deg, var(--primary), #5b9bff);
            box-shadow: 0 6px 16px rgba(45, 111, 247, 0.4);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            margin: 0;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-col {
            min-width: 160px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.98rem;
            font-weight: 600;
            margin-bottom: 18px;
        }

        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: #fff;
            padding-left: 6px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            padding: 24px 0 28px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-bottom a:hover { color: #fff; }

        @media (max-width: 1024px) {
            .footer-main { gap: 30px; }
            .article-body-card { padding: 32px 28px; }
        }

        @media (max-width: 768px) {
            :root { --container-w: 100%; }
            .header-inner { gap: 12px; }
            .nav-toggle { display: flex; align-items: center; justify-content: center; }
            .nav-links {
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 16px 32px rgba(30, 41, 59, 0.12);
                display: none;
                z-index: 99;
            }
            .nav-links.open { display: flex; }
            .nav-links a {
                padding: 14px 18px;
                border-radius: 10px;
                border-bottom: 1px solid var(--border);
                width: 100%;
            }
            .nav-links a:last-child { border-bottom: 0; }
            .page-hero { padding: 48px 0 42px; }
            .article-main { padding: 40px 0 50px; }
            .article-body-card { padding: 26px 20px; }
            .sidebar-sticky { position: static; }
            .cta-card { padding: 36px 22px; }
            .footer-main { flex-direction: column; gap: 28px; }
            .footer-brand { max-width: none; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .logo { font-size: 1.1rem; }
            .logo-icon { width: 36px; height: 36px; font-size: 0.95rem; border-radius: 10px; }
            .page-hero h1 { font-size: 1.5rem; }
            .hero-meta { gap: 12px; font-size: 0.85rem; }
            .article-body-card { padding: 22px 16px; border-radius: 14px; }
            .article-content { font-size: 0.97rem; line-height: 1.85; }
            .article-content h2 { font-size: 1.28rem; }
            .faq-item { padding: 20px 18px; }
            .faq-item p { padding-left: 22px; }
            .related-card .card-body { padding: 18px; }
            .cta-buttons { flex-direction: column; align-items: stretch; }
            .btn-white, .btn-ghost { justify-content: center; }
        }

/* roulang page: category1 */
:root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --primary-light: #dbeafe;
      --accent: #10b981;
      --accent-light: #d1fae5;
      --warm: #f59e0b;
      --bg: #f8fafc;
      --surface: #ffffff;
      --text: #0f172a;
      --text-weak: #64748b;
      --border: #e2e8f0;
      --radius-lg: 22px;
      --radius-md: 16px;
      --radius-sm: 10px;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
      --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
      --shadow-lg: 0 18px 44px rgba(15, 23, 42, .12);
      --space-section: 96px;
      --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font);
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

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

    ul,
    ol {
      list-style: none;
    }

    h1, h2, h3, h4, h5, h6 {
      line-height: 1.3;
      margin: 0;
    }

    button,
    input,
    select {
      font-family: inherit;
      font-size: 1rem;
    }

    a:focus-visible,
    button:focus-visible,
    summary:focus-visible {
      outline: 3px solid rgba(37, 99, 235, .45);
      outline-offset: 2px;
      border-radius: 6px;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .section {
      padding: var(--space-section) 0;
    }

    .section-head {
      max-width: 780px;
      margin-bottom: 48px;
    }

    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-head h2 {
      font-size: clamp(1.8rem, 3vw, 2.5rem);
      font-weight: 800;
      letter-spacing: -.02em;
    }

    .section-head p {
      color: var(--text-weak);
      margin-top: 14px;
      font-size: 1.05rem;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary-light);
      color: var(--primary);
      padding: 6px 16px;
      border-radius: 999px;
      font-size: .85rem;
      font-weight: 600;
      margin-bottom: 16px;
    }

    .eyebrow.light {
      background: rgba(255, 255, 255, .15);
      color: #fff;
      border: 1px solid rgba(255, 255, 255, .25);
      backdrop-filter: blur(6px);
    }

    .badge {
      display: inline-block;
      background: rgba(255, 255, 255, .2);
      border: 1px solid rgba(255, 255, 255, .35);
      padding: 4px 14px;
      border-radius: 999px;
      font-size: .8rem;
      margin-bottom: 10px;
      backdrop-filter: blur(4px);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 12px 26px;
      border-radius: 999px;
      font-weight: 600;
      font-size: 1rem;
      border: 0;
      cursor: pointer;
      transition: all .25s ease;
      line-height: 1.4;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 14px rgba(37, 99, 235, .28);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(37, 99, 235, .35);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 2px 8px rgba(37, 99, 235, .3);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, .12);
      color: #fff;
      border: 1px solid rgba(255, 255, 255, .4);
      backdrop-filter: blur(6px);
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, .25);
      transform: translateY(-2px);
    }

    .btn-white {
      background: #fff;
      color: var(--primary);
      box-shadow: 0 4px 14px rgba(15, 23, 42, .12);
    }

    .btn-white:hover {
      background: #f1f5f9;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(15, 23, 42, .16);
    }

    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 1.5px solid var(--primary);
    }

    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: all .3s ease;
    }

    .card-hover:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    /* ======= Header / Nav ======= */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      padding: 16px 0 8px;
      background: rgba(248, 250, 252, .88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
    }

    .nav-panel {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 18px;
      padding: 8px 14px;
      box-shadow: var(--shadow-sm);
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.12rem;
      color: var(--text);
      flex-shrink: 0;
    }

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

    .logo-icon {
      width: 38px;
      height: 38px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
      flex-wrap: wrap;
    }

    .nav-links a {
      padding: 9px 18px;
      border-radius: 999px;
      font-weight: 500;
      color: var(--text-weak);
      transition: all .2s ease;
    }

    .nav-links a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }

    .nav-links a.active {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 12px rgba(37, 99, 235, .3);
    }

    .nav-toggle {
      display: none;
      background: transparent;
      border: 0;
      font-size: 1.35rem;
      color: var(--text);
      cursor: pointer;
      padding: 8px 10px;
      border-radius: 10px;
    }

    .nav-toggle:hover {
      background: var(--bg);
    }

    .nav-cta {
      padding: 10px 20px;
      font-size: .9rem;
      flex-shrink: 0;
    }

    /* ======= Hero ======= */
    .hero {
      position: relative;
      background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
      color: #fff;
      padding: 120px 0;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(15, 23, 42, .78) 10%, rgba(37, 99, 235, .45) 90%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 780px;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, .16);
      border: 1px solid rgba(255, 255, 255, .3);
      padding: 8px 18px;
      border-radius: 999px;
      font-size: .85rem;
      font-weight: 500;
      backdrop-filter: blur(8px);
      margin-bottom: 22px;
    }

    .hero h1 {
      font-size: clamp(2rem, 4.2vw, 3.1rem);
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -.02em;
    }

    .hero p {
      font-size: 1.14rem;
      color: rgba(255, 255, 255, .92);
      margin-top: 20px;
      max-width: 640px;
    }

    .hero-btns {
      display: flex;
      gap: 14px;
      margin-top: 34px;
      flex-wrap: wrap;
    }

    /* ======= Stats ======= */
    .stats-section {
      padding: 64px 0;
      border-bottom: 1px solid var(--border);
    }

    .stat-card {
      text-align: center;
      padding: 30px 20px;
      height: 100%;
    }

    .stat-icon {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      font-size: 1.4rem;
    }

    .stat-number {
      font-size: 2rem;
      font-weight: 800;
      line-height: 1.2;
      color: var(--text);
    }

    .stat-label {
      color: var(--text-weak);
      font-size: .95rem;
      margin-top: 4px;
    }

    /* ======= Feature Cards ======= */
    .feature-card {
      padding: 32px 26px;
      height: 100%;
    }

    .feature-icon {
      width: 52px;
      height: 52px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      margin-bottom: 18px;
    }

    .feature-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .feature-card p {
      color: var(--text-weak);
      font-size: .95rem;
      line-height: 1.65;
    }

    /* ======= Steps ======= */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }

    .step-card {
      position: relative;
      padding: 30px 24px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: all .3s ease;
    }

    .step-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .step-num {
      width: 42px;
      height: 42px;
      border-radius: 13px;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
      margin-bottom: 18px;
      box-shadow: 0 4px 12px rgba(37, 99, 235, .3);
    }

    .step-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .step-card p {
      color: var(--text-weak);
      font-size: .92rem;
      line-height: 1.6;
    }

    .steps-visual {
      position: relative;
      margin-top: 36px;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      min-height: 280px;
    }

    .steps-visual img {
      width: 100%;
      height: 340px;
      object-fit: cover;
    }

    .steps-visual::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(15, 23, 42, .6), transparent 65%);
    }

    .steps-visual-overlay {
      position: absolute;
      left: 26px;
      right: 26px;
      bottom: 24px;
      z-index: 2;
      color: #fff;
    }

    .steps-visual-overlay h3 {
      font-size: 1.5rem;
      font-weight: 800;
    }

    .steps-visual-overlay p {
      color: rgba(255, 255, 255, .9);
      margin-top: 6px;
      max-width: 520px;
    }

    /* ======= Troubleshoot ======= */
    .troubleshoot-section {
      background: #f1f5f9;
    }

    .split-media {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      height: 100%;
      min-height: 320px;
    }

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

    .issue-list {
      margin-top: 24px;
    }

    .issue-item {
      display: flex;
      gap: 16px;
      padding: 18px 20px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      transition: all .25s ease;
    }

    .issue-item:hover {
      box-shadow: var(--shadow-sm);
      transform: translateX(4px);
    }

    .issue-icon {
      flex: 0 0 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--accent-light);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.05rem;
    }

    .issue-item h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .issue-item p {
      color: var(--text-weak);
      font-size: .9rem;
      line-height: 1.6;
    }

    /* ======= Security ======= */
    .security-section {
      position: relative;
      background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
      color: #fff;
    }

    .security-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(15, 23, 42, .82) 30%, rgba(16, 185, 129, .35) 100%);
    }

    .security-section .container {
      position: relative;
      z-index: 2;
    }

    .security-section h2 {
      font-size: clamp(1.7rem, 3vw, 2.4rem);
      font-weight: 800;
    }

    .security-section p {
      color: rgba(255, 255, 255, .88);
      margin-top: 14px;
      font-size: 1.05rem;
      max-width: 560px;
    }

    .security-list {
      margin-top: 24px;
    }

    .security-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 6px 0;
      color: rgba(255, 255, 255, .92);
      font-size: .95rem;
    }

    .security-list i {
      color: #34d399;
      font-size: 1rem;
    }

    .security-section .btn-white {
      margin-top: 26px;
    }

    .security-card-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .security-mini-card {
      background: rgba(255, 255, 255, .13);
      border: 1px solid rgba(255, 255, 255, .22);
      border-radius: var(--radius-md);
      padding: 24px;
      backdrop-filter: blur(8px);
      transition: all .3s ease;
    }

    .security-mini-card:hover {
      background: rgba(255, 255, 255, .2);
      transform: translateY(-3px);
    }

    .security-mini-card i {
      font-size: 1.4rem;
      color: #34d399;
      margin-bottom: 12px;
      display: block;
    }

    .security-mini-card h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .security-mini-card p {
      color: rgba(255, 255, 255, .8);
      font-size: .85rem;
      margin-top: 0;
      line-height: 1.55;
    }

    /* ======= FAQ ======= */
    .faq-item {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 22px 28px;
      margin-bottom: 14px;
      box-shadow: var(--shadow-sm);
      transition: box-shadow .25s ease;
    }

    .faq-item:hover {
      box-shadow: var(--shadow-md);
    }

    .faq-item summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      cursor: pointer;
      font-weight: 600;
      font-size: 1.05rem;
      list-style: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary i {
      color: var(--text-weak);
      transition: transform .25s ease;
      font-size: .9rem;
      flex-shrink: 0;
    }

    .faq-item[open] summary i {
      transform: rotate(180deg);
      color: var(--primary);
    }

    .faq-a {
      margin-top: 14px;
      color: var(--text-weak);
      font-size: .95rem;
      line-height: 1.7;
      padding-top: 14px;
      border-top: 1px solid var(--border);
    }

    /* ======= CTA ======= */
    .cta-block {
      position: relative;
      background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
      border-radius: var(--radius-lg);
      padding: 64px 56px;
      color: #fff;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    .cta-block::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(15, 23, 42, .72), rgba(37, 99, 235, .45));
    }

    .cta-content {
      position: relative;
      z-index: 2;
      max-width: 680px;
    }

    .cta-content h2 {
      font-size: clamp(1.6rem, 3vw, 2.3rem);
      font-weight: 800;
      line-height: 1.3;
    }

    .cta-content p {
      color: rgba(255, 255, 255, .9);
      margin-top: 14px;
      font-size: 1.05rem;
    }

    .cta-btns {
      display: flex;
      gap: 14px;
      margin-top: 28px;
      flex-wrap: wrap;
    }

    /* ======= Footer ======= */
    .site-footer {
      background: #0f172a;
      color: #cbd5e1;
      padding: 64px 0 30px;
      margin-top: var(--space-section);
    }

    .site-footer .footer-main {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 44px;
      padding-bottom: 34px;
      border-bottom: 1px solid rgba(255, 255, 255, .09);
    }

    .footer-brand .logo {
      color: #fff;
    }

    .footer-brand .logo:hover {
      color: #e2e8f0;
    }

    .footer-brand p {
      margin-top: 16px;
      font-size: .9rem;
      line-height: 1.7;
      color: #94a3b8;
      max-width: 400px;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-col a {
      display: block;
      color: #94a3b8;
      padding: 4px 0;
      font-size: .9rem;
    }

    .footer-col a:hover {
      color: #fff;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: .84rem;
      color: #64748b;
      padding-top: 26px;
      flex-wrap: wrap;
    }

    .footer-bottom a {
      color: #94a3b8;
    }

    .footer-bottom a:hover {
      color: #fff;
    }

    /* ======= Responsive ======= */
    @media (max-width: 1024px) {
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .security-card-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      :root {
        --space-section: 64px;
      }

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

      .nav-panel {
        flex-wrap: wrap;
      }

      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 10px 0 4px;
        border-top: 1px solid var(--border);
        margin-top: 8px;
      }

      .nav-links.open {
        display: flex;
      }

      .nav-links a {
        text-align: center;
        padding: 12px 16px;
      }

      .nav-cta {
        display: none;
      }

      .hero {
        padding: 90px 0;
      }

      .steps-visual img {
        height: 240px;
      }

      .security-card-grid {
        margin-top: 28px;
      }

      .cta-block {
        padding: 44px 28px;
      }

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

      .footer-col a {
        display: inline-block;
        margin-right: 18px;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding: 0 18px;
      }

      .hero h1 {
        font-size: 1.75rem;
      }

      .hero p {
        font-size: 1rem;
      }

      .hero-btns .btn {
        width: 100%;
        justify-content: center;
      }

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

      .steps-visual img {
        height: 200px;
      }

      .security-card-grid {
        grid-template-columns: 1fr;
      }

      .stat-number {
        font-size: 1.6rem;
      }

      .faq-item {
        padding: 18px 16px;
      }

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

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
  --primary: #1e3a5f;
  --primary-dark: #142b47;
  --primary-light: #3b5b80;
  --accent: #e8a23a;
  --accent-dark: #d08a24;
  --accent-light: #f7ddb0;
  --bg: #f4f6fa;
  --white: #ffffff;
  --text: #25364d;
  --text-light: #6c829e;
  --border: #e3e9f1;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow: 0 8px 30px rgba(20,43,71,.08);
  --shadow-lg: 0 18px 44px rgba(20,43,71,.13);
  --shadow-accent: 0 10px 24px rgba(232,162,58,.3);
  --transition: .25s ease;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ===== 基础 Reset ===== */
*, *::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);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: 999px; font-size: 15px; font-weight: 600;
  transition: all var(--transition); line-height: 1.4; border: 2px solid transparent;
}
.btn-accent { background: var(--accent); color: #1a2b3e; box-shadow: var(--shadow-accent); }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 14px 30px rgba(232,162,58,.38); }
.btn-outline { border-color: rgba(255,255,255,.7); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.14); border-color: #fff; transform: translateY(-2px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid rgba(232,162,58,.5); outline-offset: 2px; }

/* ===== 徽章 / 标签 ===== */
.tag {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 16px;
  background: rgba(232,162,58,.12); color: var(--accent-dark); border-radius: 999px;
  font-size: 13px; font-weight: 600;
}
.badge {
  display: inline-block; padding: 4px 14px; border-radius: 999px;
  font-size: 12px; font-weight: 700; letter-spacing: .4px;
}
.badge-warning { background: #fff4e0; color: #b5721a; }
.badge-danger { background: #fdeaec; color: #c0392b; }
.badge-info { background: #e7f0fa; color: #2c6ea5; }
.badge-success { background: #e6f6ed; color: #1e7a45; }

/* ===== 头部导航 ===== */
.site-header {
  background: var(--white);
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 12px rgba(20,43,71,.04);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: var(--primary); }
.logo-icon {
  width: 40px; height: 40px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 16px;
  box-shadow: 0 4px 12px rgba(30,58,95,.22);
}
.nav-wrap {
  display: flex; align-items: center; gap: 28px;
  background: var(--bg); padding: 8px 8px; border-radius: 999px; border: 1px solid var(--border);
}
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  display: inline-flex; align-items: center; padding: 9px 20px; border-radius: 999px;
  font-size: 14px; font-weight: 600; color: var(--text-light); transition: all var(--transition);
}
.nav-links a:hover { color: var(--primary); background: rgba(30,58,95,.06); }
.nav-links a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(30,58,95,.25); }
.nav-cta { padding: 9px 24px; font-size: 14px; flex-shrink: 0; }
.nav-toggle {
  display: none; width: 40px; height: 40px; border-radius: 10px; align-items: center; justify-content: center;
  background: var(--bg); color: var(--primary); font-size: 18px; border: 1px solid var(--border);
}

/* ===== Hero 首屏 ===== */
.security-hero {
  position: relative;
  background: linear-gradient(rgba(16, 36, 60, .88), rgba(20, 43, 71, .88)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  padding: 88px 0 80px; color: #fff; text-align: center;
}
.security-hero .tag { background: rgba(255,255,255,.15); color: var(--accent-light); }
.security-hero h1 { font-size: 46px; font-weight: 800; line-height: 1.25; margin: 16px 0 14px; letter-spacing: 1px; }
.security-hero h1 span { color: var(--accent); }
.security-hero p { font-size: 17px; color: rgba(255,255,255,.78); max-width: 640px; margin: 0 auto 28px; }
.crumbs { font-size: 13px; color: rgba(255,255,255,.6); margin-top: 20px; }
.crumbs a { color: rgba(255,255,255,.75); }
.crumbs a:hover { color: var(--accent-light); }
.crumbs i { margin: 0 8px; font-size: 10px; }

/* ===== 板块通用 ===== */
.section { padding: 80px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2 { font-size: 34px; font-weight: 800; color: var(--primary); line-height: 1.35; }
.section-head h2 span { color: var(--accent-dark); }
.section-head p { color: var(--text-light); font-size: 16px; margin-top: 12px; }
.sep { width: 48px; height: 4px; background: var(--accent); border-radius: 2px; margin: 18px auto 0; }

/* ===== 安全概述 ===== */
.overview-wrap { display: flex; align-items: center; gap: 56px; }
.overview-media { flex: 0 0 48%; position: relative; }
.overview-media img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.overview-media::after {
  content: ''; position: absolute; inset: auto -18px -18px auto; width: 140px; height: 140px;
  border-radius: 20px; background: var(--accent); z-index: -1; opacity: .35;
}
.overview-content h2 { font-size: 30px; color: var(--primary); font-weight: 800; line-height: 1.4; }
.overview-content h2 span { color: var(--accent-dark); }
.overview-content p { color: var(--text-light); margin-top: 14px; font-size: 15px; }
.trait-list { margin-top: 24px; display: grid; gap: 14px; }
.trait-list li { display: flex; align-items: center; gap: 12px; font-size: 15px; font-weight: 500; color: var(--text); }
.trait-list i { color: var(--accent); font-size: 18px; }

/* ===== 风险卡片 ===== */
.risk-section { background: linear-gradient(180deg, var(--white), var(--bg)); }
.risk-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 32px 26px; height: 100%; transition: all var(--transition); position: relative; overflow: hidden;
}
.risk-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light)); opacity: 0; transition: opacity var(--transition);
}
.risk-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); border-color: transparent; }
.risk-card:hover::before { opacity: 1; }
.risk-icon {
  width: 56px; height: 56px; border-radius: 16px; display: inline-flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 18px;
}
.risk-icon.red { background: #fdeaec; color: #c0392b; }
.risk-icon.orange { background: #fff4e0; color: #d98a1f; }
.risk-icon.blue { background: #e7f0fa; color: #2c6ea5; }
.risk-icon.purple { background: #ede8f9; color: #6b4fa0; }
.risk-card h3 { font-size: 18px; color: var(--primary); font-weight: 700; margin-bottom: 10px; }
.risk-card p { color: var(--text-light); font-size: 14px; line-height: 1.75; }

/* ===== 防护流程 ===== */
.step-section { background: linear-gradient(rgba(20,43,71,.92), rgba(20,43,71,.92)), url('/assets/images/backpic/back-3.png') center center / cover no-repeat; color: #fff; }
.step-section .section-head h2 { color: #fff; }
.step-section .section-head p { color: rgba(255,255,255,.7); }
.step-section .sep { background: var(--accent); }
.step-row { display: flex; gap: 20px; margin-top: 10px; }
.step-card {
  flex: 1; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius-lg); padding: 30px 24px; backdrop-filter: blur(6px);
  transition: all var(--transition); position: relative;
}
.step-card:hover { background: rgba(255,255,255,.14); transform: translateY(-6px); }
.step-num {
  font-size: 40px; font-weight: 800; color: var(--accent); line-height: 1; position: absolute; top: 22px; right: 24px; opacity: .35;
}
.step-card .step-icon { font-size: 26px; color: var(--accent); margin-bottom: 14px; }
.step-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.step-card p { color: rgba(255,255,255,.72); font-size: 14px; line-height: 1.7; }
.step-arrow { align-self: center; color: var(--accent); font-size: 20px; flex-shrink: 0; }

/* ===== 数据统计 ===== */
.stats-section { padding: 64px 0; background: var(--white); border-block: 1px solid var(--border); }
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 48px 64px; }
.stat-item { text-align: center; min-width: 160px; }
.stat-item .num { font-size: 44px; font-weight: 800; color: var(--primary); line-height: 1.2; }
.stat-item .num span { color: var(--accent); }
.stat-item .label { font-size: 14px; color: var(--text-light); margin-top: 6px; }

/* ===== 安全工具 ===== */
.tool-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; height: 100%; transition: all var(--transition); display: flex; flex-direction: column;
}
.tool-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
.tool-card img { height: 190px; object-fit: cover; width: 100%; }
.tool-body { padding: 22px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.tool-body h3 { font-size: 18px; color: var(--primary); font-weight: 700; }
.tool-body p { color: var(--text-light); font-size: 14px; margin-top: 8px; flex: 1; }
.tool-link { margin-top: 16px; display: inline-flex; align-items: center; gap: 8px; color: var(--accent-dark); font-weight: 600; font-size: 14px; }
.tool-link i { transition: transform var(--transition); }
.tool-link:hover i { transform: translateX(4px); }

/* ===== 安全提醒 ===== */
.remind-wrap { display: flex; align-items: center; gap: 56px; }
.remind-list { flex: 1; }
.remind-list h2 { font-size: 30px; color: var(--primary); font-weight: 800; line-height: 1.4; }
.remind-list h2 span { color: var(--accent-dark); }
.remind-items { margin-top: 24px; display: grid; gap: 16px; }
.remind-item { display: flex; gap: 16px; background: var(--white); padding: 18px 20px; border-radius: var(--radius-md); border: 1px solid var(--border); transition: all var(--transition); }
.remind-item:hover { box-shadow: var(--shadow); border-color: transparent; }
.remind-item i { color: var(--accent); font-size: 18px; margin-top: 4px; flex-shrink: 0; }
.remind-item h4 { font-size: 15px; color: var(--primary); font-weight: 700; }
.remind-item p { font-size: 13px; color: var(--text-light); margin-top: 4px; line-height: 1.6; }
.remind-media { flex: 0 0 44%; }
.remind-media img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

/* ===== FAQ 手风琴 ===== */
.faq-section { background: var(--white); }
.accordion { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.accordion-item { border-bottom: 1px solid var(--border); }
.accordion-item:last-child { border-bottom: none; }
.accordion-title {
  font-size: 16px !important; font-weight: 600; color: var(--text) !important; padding: 20px 24px !important;
  background: transparent !important; display: flex; justify-content: space-between; align-items: center;
}
.accordion-title:hover { background: rgba(30,58,95,.04) !important; }
.accordion-title::after { content: '\f078' !important; font-family: "Font Awesome 6 Free"; font-weight: 900; font-size: 13px; color: var(--accent-dark); }
.accordion-item.is-active > .accordion-title::after { content: '\f077' !important; }
.accordion-content { background: var(--bg) !important; color: var(--text-light) !important; font-size: 14px; line-height: 1.8; padding: 0 24px 20px !important; }

/* ===== CTA ===== */
.cta-section { padding: 80px 0; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); position: relative; overflow: hidden; }
.cta-section::before {
  content: ''; position: absolute; top: -80px; right: -40px; width: 300px; height: 300px; border-radius: 50%;
  background: rgba(232,162,58,.12);
}
.cta-box { text-align: center; color: #fff; position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.cta-box h2 { font-size: 34px; font-weight: 800; line-height: 1.35; }
.cta-box p { color: rgba(255,255,255,.78); margin: 14px auto 30px; font-size: 16px; max-width: 520px; }
.cta-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ===== 页脚 ===== */
.site-footer { background: #152c47; color: rgba(255,255,255,.65); padding: 56px 0 0; }
.footer-main { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 40px; }
.footer-brand .logo { color: #fff; font-size: 19px; }
.footer-brand .logo-icon { background: var(--accent); color: var(--primary); }
.footer-brand p { font-size: 14px; margin-top: 14px; line-height: 1.8; max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.footer-col a { display: block; color: rgba(255,255,255,.6); font-size: 14px; padding: 5px 0; transition: color var(--transition); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 10px; font-size: 13px; color: rgba(255,255,255,.45);
}
.footer-bottom a { color: rgba(255,255,255,.6); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .security-hero h1 { font-size: 38px; }
  .overview-wrap, .remind-wrap { gap: 36px; }
  .step-row { flex-wrap: wrap; }
  .step-card { flex: 1 1 calc(50% - 20px); }
  .step-arrow { display: none; }
}
@media (max-width: 768px) {
  .nav-wrap { background: transparent; border: none; padding: 0; }
  .nav-links {
    position: fixed; top: 76px; left: 24px; right: 24px; background: var(--white);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); border: 1px solid var(--border);
    display: none; flex-direction: column; padding: 16px; gap: 8px; z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; justify-content: center; }
  .nav-cta { display: none; }
  .nav-toggle { display: inline-flex; }
  .security-hero { padding: 68px 0; }
  .security-hero h1 { font-size: 32px; }
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 27px; }
  .overview-wrap, .remind-wrap { flex-direction: column; }
  .overview-media, .remind-media { width: 100%; }
  .step-card { flex: 1 1 100%; }
  .footer-main { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
  .stats-grid { gap: 32px; }
  .cta-box h2 { font-size: 27px; }
}
@media (max-width: 520px) {
  .header-inner { gap: 12px; }
  .logo { font-size: 16px; }
  .logo-icon { width: 34px; height: 34px; font-size: 13px; border-radius: 10px; }
  .security-hero h1 { font-size: 26px; }
  .security-hero p { font-size: 15px; }
  .nav-links { top: 66px; left: 14px; right: 14px; }
  .section { padding: 44px 0; }
  .section-head h2 { font-size: 23px; }
  .risk-card { padding: 24px 20px; }
  .tool-body { padding: 18px; }
  .stats-grid { gap: 24px; }
  .stat-item .num { font-size: 34px; }
  .cta-btns .btn { width: 100%; }
}