/* roulang page: index */
:root {
  --primary: #1a5cff;
  --primary-dark: #0b3bbf;
  --primary-light: #e8edff;
  --accent: #ff6b35;
  --accent-light: #fff3ec;
  --dark: #0d1b2a;
  --dark-soft: #16283a;
  --text: #1e2a3a;
  --text-weak: #5a6b7d;
  --bg: #f5f7fb;
  --bg-white: #ffffff;
  --border: #dfe5ef;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(13, 27, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(13, 27, 42, 0.15);
  --transition: 0.3s ease;
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background-color: 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 var(--transition); }
ul { list-style: none; }
button, input { font-family: inherit; border: none; outline: none; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* Header & Navigation */
.header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(223, 229, 239, 0.7);
  box-shadow: 0 2px 12px rgba(13, 27, 42, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  box-shadow: 0 4px 14px rgba(26, 92, 255, 0.35);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-weak);
  border-radius: 50px;
  transition: all var(--transition);
}

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

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  line-height: 1.4;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  box-shadow: 0 6px 20px rgba(26, 92, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(26, 92, 255, 0.4);
  color: #fff;
}

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

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

.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, #e04a1a 100%);
  color: #fff;
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.3);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255, 107, 53, 0.45);
  color: #fff;
}

.btn-lg { padding: 16px 36px; font-size: 1.05rem; }

/* Nav toggle for mobile */
.nav-toggle {
  display: none;
  background: none;
  font-size: 1.5rem;
  color: var(--dark);
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 8px;
}

/* Hero */
.hero {
  position: relative;
  padding: 120px 0 100px;
  background: linear-gradient(160deg, #0d1b2a 0%, #16283a 50%, #1a3050 100%);
  color: #fff;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.28;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 27, 42, 0.2) 0%, rgba(13, 27, 42, 0.6) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 880px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
  backdrop-filter: blur(8px);
}

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

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, #4d8fff 0%, #ff8c5a 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

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

/* Hero stats */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 720px;
  margin: 50px auto 0;
  position: relative;
  z-index: 2;
}

.stat-item {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-4px);
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.65);
}

/* Section common */
.section { padding: 90px 0; }

.section-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
  background: var(--primary-light);
  padding: 6px 16px;
  border-radius: 50px;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-weak);
  max-width: 640px;
  line-height: 1.8;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-head .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* Feature cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 40px 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 22px;
  background: var(--primary-light);
  color: var(--primary);
}

.feature-icon.accent {
  background: var(--accent-light);
  color: var(--accent);
}

.feature-icon.green {
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-weak);
  line-height: 1.7;
}

/* Category Section */
.category-section {
  background: var(--bg-white);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.category-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  align-items: stretch;
  min-height: 200px;
}

.category-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--primary-light);
  background: var(--bg-white);
}

.category-card-img {
  width: 220px;
  min-height: 220px;
  object-fit: cover;
  flex-shrink: 0;
}

.category-card-body {
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.category-card-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}

.category-card-body p {
  font-size: 0.95rem;
  color: var(--text-weak);
  margin-bottom: 18px;
  line-height: 1.7;
}

.category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: gap var(--transition);
}

.category-link:hover { gap: 14px; }

/* Content list */
.content-section {
  background: var(--bg);
}

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

.content-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  transition: all var(--transition);
  box-shadow: 0 2px 10px rgba(13, 27, 42, 0.04);
}

.content-card:hover {
  box-shadow: var(--shadow);
  transform: translateX(6px);
  border-color: var(--primary-light);
}

.content-card-thumb {
  width: 280px;
  min-height: 180px;
  object-fit: cover;
  flex-shrink: 0;
}

.content-card-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
}

.content-card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.blog-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
}

.blog-date {
  font-size: 0.8rem;
  color: var(--text-weak);
  display: flex;
  align-items: center;
  gap: 6px;
}

.content-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
  line-height: 1.4;
}

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

.content-card p {
  font-size: 0.95rem;
  color: var(--text-weak);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* CTA section */
.cta-section {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-soft) 100%);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
  text-align: center;
  color: #fff;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}

.cta-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.cta-content p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 36px;
}

/* FAQ */
.faq-section { background: var(--bg-white); }

.faq-grid {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item:hover {
  border-color: var(--primary-light);
  box-shadow: 0 4px 16px rgba(26, 92, 255, 0.06);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  color: var(--dark);
  transition: color var(--transition);
}

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

.faq-question i {
  font-size: 0.8rem;
  color: var(--text-weak);
  transition: transform var(--transition), color var(--transition);
}

.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--text-weak);
  line-height: 1.8;
}

/* Data stats */
.stats-section {
  background: var(--dark);
  padding: 80px 0;
  color: #fff;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stats-item {
  padding: 40px 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.stats-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.stats-item .num {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #4d8fff 0%, #ff8c5a 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stats-item .label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
}

/* Process */
.process-section { background: var(--bg); }

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 48px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-light) 0%, var(--primary) 100%);
  z-index: 0;
}

.process-step {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  z-index: 1;
  transition: all var(--transition);
  box-shadow: var(--shadow);
}

.process-step:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  box-shadow: 0 4px 14px rgba(26, 92, 255, 0.3);
}

.process-step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}

.process-step p {
  font-size: 0.88rem;
  color: var(--text-weak);
  line-height: 1.7;
}

/* Footer */
.footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 24px;
  margin-top: 0;
}

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

.footer-brand .brand {
  color: #fff;
  margin-bottom: 18px;
}

.footer-brand .brand-icon {
  background: linear-gradient(135deg, #4d8fff 0%, var(--primary-dark) 100%);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 320px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition);
}

.footer-social a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition);
}

.footer-col ul li a:hover {
  color: #4d8fff;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a { color: rgba(255, 255, 255, 0.5); }
.footer-bottom a:hover { color: #4d8fff; }

/* Empty state */
.empty-tip {
  text-align: center;
  padding: 40px;
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
  color: var(--text-weak);
  font-size: 0.95rem;
}

/* Focus states */
a:focus-visible, button:focus-visible {
  outline: 3px solid rgba(26, 92, 255, 0.4);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Media queries */
@media screen and (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .process-steps::before { display: none; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 2.6rem; }
  .content-card-thumb { width: 220px; }
}

@media screen and (max-width: 768px) {
  .header-inner { height: 64px; }
  .nav-toggle { display: block; }
  .nav-list {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px;
    gap: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transform: translateY(-150%);
    transition: transform 0.4s ease;
    z-index: 99;
    border-bottom: 1px solid var(--border);
  }
  .nav-list.open { transform: translateY(0); }
  .nav-link { display: block; width: 100%; text-align: center; }
  .nav-cta { margin-left: 0; }
  .hero { padding: 80px 0 60px; }
  .hero h1 { font-size: 2rem; }
  .hero-desc { font-size: 1rem; margin-bottom: 28px; }
  .hero-stats { grid-template-columns: 1fr 1fr 1fr; margin-top: 36px; }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.7rem; }
  .feature-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .feature-card { padding: 28px 20px; }
  .category-grid { grid-template-columns: 1fr; }
  .content-card { flex-direction: column; }
  .content-card-thumb { width: 100%; height: 200px; }
  .cta-content h2 { font-size: 1.9rem; }
  .process-steps { grid-template-columns: 1fr 1fr; gap: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media screen and (max-width: 520px) {
  .container { padding: 0 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.7rem; }
  .hero-stats { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; align-items: stretch; }
  .hero-buttons .btn { width: 100%; }
  .stat-item { padding: 14px; }
  .category-card { flex-direction: column; }
  .category-card-img { width: 100%; min-height: 140px; max-height: 200px; }
  .btn-lg { padding: 14px 28px; }
  .stat-number { font-size: 1.4rem; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
    :root {
      --primary: #0b1d3a;
      --primary-light: #16305c;
      --primary-dark: #071528;
      --accent: #c9a96e;
      --accent-light: #e0c88c;
      --accent-dark: #a8853f;
      --bg: #f7f5f0;
      --bg-white: #ffffff;
      --bg-dark: #0b1d3a;
      --text: #1c1c1c;
      --text-light: #6b6b6b;
      --text-white: #ffffff;
      --border: #e5e0d5;
      --border-light: #f0ece3;
      --radius: 16px;
      --radius-sm: 10px;
      --radius-lg: 24px;
      --shadow: 0 8px 30px rgba(11, 29, 58, 0.08);
      --shadow-hover: 0 16px 46px rgba(11, 29, 58, 0.14);
      --space-section: 90px;
      --space-section-sm: 60px;
      --transition: all 0.3s cubic-bezier(.4, 0, .2, 1);
    }

    /* ===== 基础 Reset ===== */
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

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

    ul,
    ol {
      list-style: none;
    }

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

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

    /* ===== 头部导航 ===== */
    .header {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
      gap: 20px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }

    .brand-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 17px;
      box-shadow: 0 4px 12px rgba(11, 29, 58, 0.2);
      flex-shrink: 0;
    }

    .nav-toggle {
      display: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
      padding: 8px;
      border-radius: 8px;
      transition: var(--transition);
    }

    .nav-toggle:hover {
      background: rgba(11, 29, 58, 0.06);
    }

    .nav-list {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .nav-list li {
      margin: 0;
    }

    .nav-link {
      display: inline-block;
      padding: 8px 16px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text);
      transition: var(--transition);
    }

    .nav-link:hover {
      background: rgba(11, 29, 58, 0.05);
      color: var(--primary);
    }

    .nav-link.active {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 14px rgba(11, 29, 58, 0.25);
    }

    .nav-cta {
      margin-left: 10px;
    }

    .nav-cta .btn {
      white-space: nowrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      line-height: 1.2;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent), var(--accent-dark));
      color: #fff;
      box-shadow: 0 4px 18px rgba(200, 160, 80, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 28px rgba(200, 160, 80, 0.45);
      color: #fff;
    }

    .btn-outline {
      border: 2px solid rgba(255, 255, 255, 0.7);
      color: #fff;
      background: transparent;
    }

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

    .btn-sm {
      padding: 8px 20px;
      font-size: 14px;
    }

    .btn-lg {
      padding: 16px 40px;
      font-size: 16px;
    }

    /* ===== Hero 区域 ===== */
    .hero {
      position: relative;
      padding: 110px 0 100px;
      background: linear-gradient(135deg, var(--primary-dark), var(--primary) 50%, var(--primary-light));
      overflow: hidden;
      color: var(--text-white);
    }

    .hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      opacity: 0.32;
      z-index: 0;
    }

    .hero-bg::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(7, 21, 40, 0.4), transparent 60%, rgba(7, 21, 40, 0.7));
    }

    .hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 860px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 999px;
      padding: 8px 20px;
      font-size: 13px;
      font-weight: 500;
      letter-spacing: 1px;
      color: var(--accent-light);
      backdrop-filter: blur(6px);
      margin-bottom: 24px;
    }

    .hero h1 {
      font-size: 52px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 18px;
      letter-spacing: 1px;
    }

    .hero h1 span {
      background: linear-gradient(135deg, var(--accent-light), #f5e5b8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-desc {
      font-size: 18px;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.85);
      margin-bottom: 34px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
    }

    .hero-countdown {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius);
      padding: 28px 36px;
      display: inline-block;
      backdrop-filter: blur(8px);
      min-width: 420px;
    }

    .countdown-title {
      font-size: 14px;
      letter-spacing: 3px;
      color: rgba(255, 255, 255, 0.75);
      margin-bottom: 16px;
      text-transform: uppercase;
    }

    .countdown-grid {
      display: flex;
      justify-content: center;
      gap: 12px;
    }

    .countdown-item {
      background: rgba(255, 255, 255, 0.1);
      border-radius: 14px;
      padding: 14px 12px;
      min-width: 72px;
      text-align: center;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .countdown-num {
      display: block;
      font-size: 30px;
      font-weight: 800;
      color: var(--accent-light);
      line-height: 1.1;
    }

    .countdown-label {
      display: block;
      font-size: 12px;
      color: rgba(255, 255, 255, 0.7);
      margin-top: 4px;
      letter-spacing: 1px;
    }

    /* ===== 通用板块 ===== */
    .section {
      padding: var(--space-section) 0;
    }

    .section-alt {
      background: var(--bg-white);
    }

    .section-head {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 56px;
    }

    .section-tag {
      display: inline-block;
      background: rgba(201, 169, 110, 0.14);
      color: var(--accent-dark);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 18px;
      border-radius: 999px;
      letter-spacing: 1px;
      margin-bottom: 12px;
    }

    .section-head h2 {
      font-size: 38px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.25;
      margin-bottom: 14px;
    }

    .section-head h2 em {
      font-style: normal;
      color: var(--accent);
    }

    .section-head p {
      font-size: 16px;
      color: var(--text-light);
      line-height: 1.7;
    }

    /* ===== 分类介绍 ===== */
    .intro-card {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      padding: 50px;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-light);
      overflow: hidden;
    }

    .intro-text .intro-badge {
      display: inline-block;
      background: linear-gradient(135deg, var(--accent), var(--accent-dark));
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 5px 14px;
      border-radius: 20px;
      letter-spacing: 1px;
      margin-bottom: 16px;
    }

    .intro-text h3 {
      font-size: 30px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.3;
      margin-bottom: 18px;
    }

    .intro-text p {
      color: var(--text-light);
      font-size: 15px;
      line-height: 1.85;
      margin-bottom: 26px;
    }

    .intro-points {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-bottom: 28px;
    }

    .intro-point {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      font-weight: 500;
    }

    .intro-point i {
      color: var(--accent);
      font-size: 16px;
      width: 20px;
    }

    .intro-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      min-height: 320px;
    }

    .intro-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.6s ease;
    }

    .intro-media:hover img {
      transform: scale(1.04);
    }

    .intro-media::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(315deg, rgba(11, 29, 58, 0.35), transparent 70%);
    }

    .media-badge {
      position: absolute;
      bottom: 20px;
      left: 20px;
      z-index: 2;
      background: rgba(255, 255, 255, 0.92);
      border-radius: 12px;
      padding: 10px 18px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
    }

    /* ===== 服务卡片 ===== */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }

    .service-card {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      text-align: center;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-light);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .service-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--accent), var(--accent-light));
      opacity: 0;
      transition: var(--transition);
    }

    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
    }

    .service-card:hover::before {
      opacity: 1;
    }

    .service-icon {
      width: 64px;
      height: 64px;
      background: linear-gradient(135deg, rgba(201, 169, 110, 0.15), rgba(201, 169, 110, 0.05));
      border-radius: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      font-size: 26px;
      color: var(--accent-dark);
      transition: var(--transition);
    }

    .service-card:hover .service-icon {
      background: linear-gradient(135deg, var(--accent), var(--accent-dark));
      color: #fff;
      box-shadow: 0 8px 20px rgba(201, 169, 110, 0.4);
      transform: scale(1.06);
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }

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

    /* ===== 数据统计 ===== */
    .stats-section {
      background: linear-gradient(135deg, var(--primary-dark), var(--primary));
      position: relative;
      overflow: hidden;
    }

    .stats-section::before {
      content: "";
      position: absolute;
      top: -60%;
      right: -20%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(201, 169, 110, 0.2), transparent 60%);
      border-radius: 50%;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 40px;
      position: relative;
      z-index: 1;
    }

    .stat-item {
      text-align: center;
      padding: 20px;
    }

    .stat-num {
      font-size: 48px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--accent-light), #f5e5b8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
      display: block;
      margin-bottom: 8px;
    }

    .stat-label {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.72);
      letter-spacing: 1px;
    }

    /* ===== 内容列表 ===== */
    .content-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .content-featured {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      min-height: 420px;
      box-shadow: var(--shadow);
      cursor: pointer;
    }

    .content-featured img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.6s ease;
    }

    .content-featured:hover img {
      transform: scale(1.05);
    }

    .content-featured-mask {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 30%, rgba(7, 21, 40, 0.85));
      display: flex;
      align-items: flex-end;
      padding: 34px;
    }

    .content-featured-mask .tag {
      position: absolute;
      top: 24px;
      left: 24px;
      background: var(--accent);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 6px 14px;
      border-radius: 20px;
      letter-spacing: 1px;
    }

    .content-featured-mask h3 {
      color: #fff;
      font-size: 22px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 8px;
    }

    .content-featured-mask p {
      color: rgba(255, 255, 255, 0.8);
      font-size: 14px;
    }

    .content-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .content-item {
      display: flex;
      gap: 18px;
      background: var(--bg-white);
      border-radius: var(--radius);
      padding: 14px;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-light);
      transition: var(--transition);
      cursor: pointer;
    }

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

    .content-item img {
      width: 110px;
      height: 88px;
      border-radius: 12px;
      object-fit: cover;
      flex-shrink: 0;
    }

    .content-item-body {
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 4px;
    }

    .content-item-body .tag {
      font-size: 11px;
      font-weight: 700;
      color: var(--accent-dark);
      background: rgba(201, 169, 110, 0.12);
      padding: 3px 10px;
      border-radius: 12px;
      display: inline-block;
      width: fit-content;
    }

    .content-item-body h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--primary);
      line-height: 1.4;
    }

    .content-item-body span {
      font-size: 12px;
      color: var(--text-light);
    }

    /* ===== 流程 ===== */
    .steps-section {
      background: linear-gradient(180deg, var(--bg), var(--bg-white));
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      counter-reset: step;
    }

    .step-card {
      position: relative;
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      padding: 40px 28px 32px;
      text-align: center;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }

    .step-card::before {
      counter-increment: step;
      content: counter(step);
      position: absolute;
      top: -18px;
      left: 50%;
      transform: translateX(-50%);
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--accent), var(--accent-dark));
      color: #fff;
      font-size: 16px;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 16px rgba(201, 169, 110, 0.4);
    }

    .step-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .step-icon {
      font-size: 32px;
      color: var(--primary);
      margin-bottom: 16px;
      margin-top: 8px;
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }

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

    /* ===== FAQ ===== */
    .faq-wrap {
      max-width: 760px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-white);
      border-radius: var(--radius);
      padding: 0;
      margin-bottom: 14px;
      box-shadow: var(--shadow);
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: var(--transition);
    }

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

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 22px 26px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 600;
      color: var(--primary);
      text-align: left;
      background: transparent;
    }

    .faq-question i {
      color: var(--accent);
      transition: var(--transition);
      font-size: 14px;
      flex-shrink: 0;
    }

    .faq-question[aria-expanded="true"] i {
      transform: rotate(180deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      padding: 0 26px;
    }

    .faq-answer-inner {
      padding-bottom: 22px;
      font-size: 15px;
      color: var(--text-light);
      line-height: 1.8;
      border-top: 1px solid var(--border-light);
      padding-top: 16px;
    }

    /* ===== CTA ===== */
    .cta-section {
      background: linear-gradient(135deg, var(--primary-dark), var(--primary));
      position: relative;
      overflow: hidden;
      padding: 80px 0;
    }

    .cta-section::before {
      content: "";
      position: absolute;
      top: -30%;
      left: -10%;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(201, 169, 110, 0.22), transparent 60%);
      border-radius: 50%;
    }

    .cta-inner {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 680px;
      margin: 0 auto;
    }

    .cta-inner h2 {
      font-size: 36px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
    }

    .cta-inner p {
      color: rgba(255, 255, 255, 0.8);
      font-size: 16px;
      margin-bottom: 30px;
    }

    /* ===== 页脚 ===== */
    .footer {
      background: var(--primary-dark);
      color: rgba(255, 255, 255, 0.75);
      padding: 70px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 50px;
    }

    .footer-brand .brand {
      color: #fff;
      font-size: 20px;
      margin-bottom: 16px;
      display: inline-flex;
    }

    .footer-brand .brand .brand-icon {
      background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.8;
      margin: 16px 0 20px;
      color: rgba(255, 255, 255, 0.6);
    }

    .footer-social {
      display: flex;
      gap: 12px;
    }

    .footer-social a {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.08);
      display: flex;
      align-items: center;
      justify-content: center;
      color: rgba(255, 255, 255, 0.8);
      transition: var(--transition);
    }

    .footer-social a:hover {
      background: var(--accent);
      color: #fff;
      transform: translateY(-3px);
    }

    .footer-col h4 {
      color: #fff;
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 20px;
      position: relative;
      padding-bottom: 10px;
    }

    .footer-col h4::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 28px;
      height: 3px;
      background: var(--accent);
      border-radius: 3px;
    }

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

    .footer-col ul a {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.65);
      transition: var(--transition);
    }

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

    .footer-col ul li:not(a) {
      font-size: 14px;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 26px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 10px;
    }

    .footer-bottom span {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.45);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      :root {
        --space-section: 70px;
      }

      .hero h1 {
        font-size: 42px;
      }

      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }

      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }

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

    @media (max-width: 768px) {
      .header-inner {
        height: 64px;
      }

      .nav-toggle {
        display: block;
      }

      .nav-list {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px 24px;
        gap: 12px;
        box-shadow: 0 20px 30px rgba(0, 0, 0, 0.1);
        transform: translateY(-120%);
        transition: transform 0.4s cubic-bezier(.4, 0, .2, 1);
        z-index: 999;
        border-bottom: 1px solid var(--border-light);
      }

      .nav-list.open {
        transform: translateY(0);
      }

      .nav-list li {
        width: 100%;
      }

      .nav-link {
        display: block;
        padding: 12px 16px;
        width: 100%;
      }

      .nav-cta {
        margin-left: 0;
        padding-top: 12px;
        border-top: 1px solid var(--border-light);
        width: 100%;
      }

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

      .hero {
        padding: 70px 0 60px;
      }

      .hero h1 {
        font-size: 34px;
      }

      .hero-desc {
        font-size: 16px;
      }

      .hero-countdown {
        min-width: auto;
        width: 100%;
        padding: 20px;
      }

      .countdown-item {
        min-width: 60px;
        padding: 10px 8px;
      }

      .countdown-num {
        font-size: 24px;
      }

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

      .intro-card {
        grid-template-columns: 1fr;
        padding: 30px;
        gap: 30px;
      }

      .section-head h2 {
        font-size: 28px;
      }

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

      .content-featured {
        min-height: 300px;
      }

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

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

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

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

    @media (max-width: 520px) {
      .container {
        padding: 0 16px;
      }

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

      .hero-actions {
        flex-direction: column;
        align-items: center;
      }

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

      .countdown-grid {
        gap: 6px;
      }

      .countdown-item {
        min-width: 52px;
        padding: 8px 6px;
      }

      .countdown-num {
        font-size: 20px;
      }

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

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

      .intro-points {
        grid-template-columns: 1fr;
      }

      .content-item {
        flex-direction: column;
        gap: 10px;
      }

      .content-item img {
        width: 100%;
        height: 140px;
      }

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

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

    /* ===== 通用动画 ===== */
    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(30px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .fade-in-up {
      opacity: 0;
      animation: fadeInUp 0.8s ease forwards;
    }

    .delay-1 { animation-delay: 0.1s; }
    .delay-2 { animation-delay: 0.2s; }
    .delay-3 { animation-delay: 0.3s; }

/* roulang page: article */
:root {
  --primary: #145ab4;
  --primary-dark: #0d3d7c;
  --primary-light: #3a7bd5;
  --accent: #e8b64f;
  --accent-dark: #c9952f;
  --accent-light: #f5d488;
  --dark: #0a1526;
  --dark-2: #101f36;
  --dark-3: #162a45;
  --light: #f2f5fa;
  --white: #ffffff;
  --text: #1f2d3d;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius-xl: 22px;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 2px 10px rgba(13, 61, 124, 0.06);
  --shadow-md: 0 8px 28px rgba(13, 61, 124, 0.10);
  --shadow-lg: 0 16px 44px rgba(13, 61, 124, 0.16);
  --shadow-accent: 0 6px 24px rgba(232, 182, 79, 0.28);
  --transition: all .3s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--light);
  color: var(--text);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

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

ul, ol {
  list-style: none;
}

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

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 15px;
  line-height: 1.2;
  padding: 13px 26px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn i {
  font-size: 14px;
}

.btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.25), transparent);
  transition: left .5s;
}

.btn:hover::after {
  left: 100%;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(20, 90, 180, .3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(20, 90, 180, .4);
}

.btn-accent {
  background: var(--accent);
  color: var(--dark);
  box-shadow: var(--shadow-accent);
}

.btn-accent:hover {
  background: var(--accent-dark);
  color: var(--dark);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 2px solid rgba(232, 182, 79, .6);
  color: var(--accent);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(232, 182, 79, .08);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 14px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 16px 34px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
  display: flex;
}

/* ===== Header / Nav ===== */
.header {
  background: rgba(10, 21, 38, .97);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 30px rgba(0, 0, 0, .25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
  flex-shrink: 0;
}

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

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  color: var(--accent);
  box-shadow: 0 4px 16px rgba(20, 90, 180, .4);
  border: 1px solid rgba(232, 182, 79, .35);
}

.header nav {
  display: flex;
  align-items: center;
}

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

.nav-list li {
  margin: 0;
}

.nav-link {
  display: inline-block;
  color: rgba(255, 255, 255, .75);
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, .06);
}

.nav-link.active {
  color: var(--accent);
  background: rgba(232, 182, 79, .10);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 2px;
  width: 26px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.nav-cta {
  margin-left: 12px;
  padding-left: 12px;
  border-left: 1px solid rgba(255, 255, 255, .12);
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
  transition: var(--transition);
}

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

/* ===== Breadcrumb ===== */
.breadcrumb {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
}

.breadcrumb a {
  color: rgba(255, 255, 255, .6);
}

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

.breadcrumb .breadcrumb-icon {
  font-size: 10px;
  color: rgba(255, 255, 255, .4);
}

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

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 80px 0 70px;
  background: var(--dark);
  overflow: hidden;
  color: #fff;
  isolation: isolate;
}

.article-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: .4;
}

.article-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(135deg, rgba(10, 21, 38, .97) 0%, rgba(20, 90, 180, .85) 45%, rgba(10, 21, 38, .97) 100%);
}

.article-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 90px;
  background: linear-gradient(to top, rgba(10, 21, 38, .99), transparent);
  z-index: 0;
  pointer-events: none;
}

.article-hero-shine {
  position: absolute;
  top: -40%;
  right: -10%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(232, 182, 79, .18) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.article-hero-content {
  position: relative;
  z-index: 2;
  margin-top: 32px;
  max-width: 880px;
}

.article-hero h1 {
  font-size: 38px;
  font-weight: 900;
  line-height: 1.3;
  margin: 20px 0 18px;
  letter-spacing: 1px;
  background: linear-gradient(135deg, #fff 60%, rgba(255, 255, 255, .85));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .25);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 100px;
  backdrop-filter: blur(8px);
}

.hero-badge i {
  font-size: 12px;
}

.hero-badge-accent {
  background: rgba(232, 182, 79, .18);
  border-color: rgba(232, 182, 79, .4);
  color: var(--accent-light);
}

.article-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, .82);
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .12);
  padding: 6px 14px;
  border-radius: 100px;
}

.meta-chip i {
  font-size: 13px;
  color: var(--accent);
}

.hero-divider {
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 3px;
  margin: 24px 0;
  position: relative;
}

.hero-divider::after {
  content: '';
  position: absolute;
  left: 80px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 1px;
  background: linear-gradient(90deg, rgba(232, 182, 79, .6), transparent);
}

.hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .78);
  max-width: 720px;
}

/* ===== Article Section ===== */
.article-section {
  padding: 70px 0 60px;
  background: var(--light);
  position: relative;
}

.article-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent), transparent);
  opacity: .3;
}

.article-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 42px 46px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(226, 232, 240, .6);
  position: relative;
}

.article-content {
  color: var(--text);
  font-size: 16px;
  line-height: 2;
}

.article-content p {
  margin-bottom: 22px;
  color: #33475b;
}

.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--dark);
  margin: 36px 0 16px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}

.article-content h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--dark);
  margin: 28px 0 12px;
}

.article-content h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--dark);
  margin: 20px 0 10px;
}

.article-content ul,
.article-content ol {
  margin: 0 0 22px;
  padding-left: 8px;
}

.article-content ul li,
.article-content ol li {
  position: relative;
  padding: 6px 0 6px 24px;
  margin-bottom: 4px;
}

.article-content ul li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 16px;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 3px;
  transform: rotate(45deg);
}

.article-content ol {
  counter-reset: list-counter;
  padding-left: 8px;
}

.article-content ol li {
  counter-increment: list-counter;
  padding-left: 34px;
}

.article-content ol li::before {
  content: counter(list-counter);
  position: absolute;
  left: 0;
  top: 6px;
  width: 24px;
  height: 24px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.article-content blockquote {
  margin: 24px 0;
  padding: 18px 24px;
  border-left: 4px solid var(--accent);
  background: #fdf9ef;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: #6b5d3c;
  font-style: italic;
}

.article-content img {
  border-radius: var(--radius-lg);
  margin: 20px 0;
  box-shadow: var(--shadow-sm);
}

.article-content a {
  color: var(--primary);
  border-bottom: 1px solid rgba(20, 90, 180, .3);
  padding-bottom: 1px;
}

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

.article-content strong {
  font-weight: 700;
  color: var(--dark);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}

.article-content table th,
.article-content table td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}

.article-content table th {
  background: var(--dark);
  color: #fff;
  font-weight: 500;
}

.article-content table tr:nth-child(even) td {
  background: #f8faff;
}

/* ===== Toolbar ===== */
.article-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border-top: 1px solid var(--border);
  padding-top: 22px;
  margin-top: 30px;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #f0f4fa;
  border: 1px solid var(--border);
  color: var(--text-weak);
  font-size: 13px;
  padding: 5px 12px;
  border-radius: 100px;
  transition: var(--transition);
}

.tag i {
  font-size: 11px;
  color: var(--primary);
}

.tag:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.tag:hover i {
  color: var(--accent);
}

.share-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-weak);
}

.share-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #f0f4fa;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-weak);
  font-size: 14px;
  transition: var(--transition);
}

.share-btn:hover {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.share-btn i {
  font-size: 14px;
}

/* ===== Author Box ===== */
.author-box {
  display: flex;
  align-items: center;
  gap: 18px;
  background: linear-gradient(135deg, var(--dark), var(--dark-2));
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-top: 24px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .08);
  position: relative;
  overflow: hidden;
}

.author-box::after {
  content: '';
  position: absolute;
  right: -30px;
  top: -30px;
  width: 120px;
  height: 120px;
  background: rgba(232, 182, 79, .16);
  border-radius: 50%;
}

.author-avatar {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--accent);
  border: 2px solid rgba(232, 182, 79, .4);
  box-shadow: 0 0 20px rgba(232, 182, 79, .2);
}

.author-info {
  flex: 1;
}

.author-info h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 3px;
}

.author-info p {
  font-size: 13px;
  color: rgba(255, 255, 255, .65);
  line-height: 1.6;
}

/* ===== Not Found ===== */
.not-found-box {
  text-align: center;
  padding: 60px 30px;
}

.not-found-box i {
  font-size: 56px;
  color: var(--primary-light);
  margin-bottom: 20px;
  display: block;
}

.not-found-box h3 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--dark);
}

.not-found-box p {
  color: var(--text-weak);
  margin-bottom: 24px;
  font-size: 15px;
}

/* ===== Sidebar ===== */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(226, 232, 240, .6);
  position: relative;
  overflow: hidden;
}

.sidebar-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--light);
  position: relative;
}

.sidebar-card h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 40px;
  height: 2px;
  background: var(--accent);
}

.sidebar-card p {
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 16px;
  line-height: 1.7;
}

.sidebar-cta-card {
  background: linear-gradient(145deg, var(--dark), var(--dark-2));
  color: #fff;
  border: 0;
}

.sidebar-cta-card::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(232, 182, 79, .25), transparent 70%);
}

.sidebar-cta-card h4 {
  color: #fff;
  border-bottom-color: rgba(255, 255, 255, .1);
}

.sidebar-cta-card h4::after {
  background: var(--accent);
}

.sidebar-cta-card p {
  color: rgba(255, 255, 255, .7);
}

.cta-icon-box {
  width: 50px;
  height: 50px;
  background: rgba(232, 182, 79, .18);
  border: 1px solid rgba(232, 182, 79, .3);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--accent);
  margin-bottom: 14px;
}

.sidebar-list li {
  border-bottom: 1px solid #f0f2f6;
}

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

.sidebar-list li a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 4px;
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
}

.sidebar-list li a i {
  font-size: 12px;
  color: var(--primary);
  transition: var(--transition);
}

.sidebar-list li a:hover {
  color: var(--primary);
  padding-left: 10px;
}

.sidebar-list li a:hover i {
  color: var(--accent);
}

.sidebar-img-card img {
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
}

.tip-list li {
  display: flex;
  gap: 10px;
  padding: 8px 0;
  font-size: 13px;
  color: var(--text-weak);
  line-height: 1.6;
}

.tip-list li i {
  color: var(--accent);
  font-size: 13px;
  margin-top: 4px;
  flex-shrink: 0;
}

/* ===== Related Section ===== */
.related-section {
  padding: 70px 0;
  background: var(--white);
}

.section-head {
  text-align: center;
  margin-bottom: 42px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  background: rgba(20, 90, 180, .08);
  padding: 5px 16px;
  border-radius: 100px;
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 900;
  color: var(--dark);
  line-height: 1.3;
}

.section-head p {
  color: var(--text-weak);
  font-size: 15px;
  margin-top: 8px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.related-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(20, 90, 180, .2);
}

.related-card-img {
  position: relative;
  height: 190px;
  overflow: hidden;
}

.related-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

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

.related-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 21, 38, .35), transparent);
}

.related-card-cat {
  position: absolute;
  z-index: 2;
  left: 14px;
  top: 14px;
  background: rgba(10, 21, 38, .75);
  backdrop-filter: blur(6px);
  color: var(--accent);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 100px;
  border: 1px solid rgba(232, 182, 79, .3);
}

.related-card-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.related-card-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.4;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 48px;
}

.related-card-body p {
  font-size: 13px;
  color: var(--text-weak);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

.related-card-meta {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-weak);
  border-top: 1px solid #f0f2f6;
  padding-top: 12px;
}

.related-card-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.related-card-meta i {
  color: var(--primary);
  font-size: 12px;
}

.related-card-meta .more-link {
  color: var(--primary);
  font-weight: 500;
  font-size: 13px;
}

.related-card-meta .more-link:hover {
  color: var(--accent-dark);
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(150deg, var(--dark) 0%, var(--dark-2) 60%, var(--primary-dark) 100%);
  position: relative;
  overflow: hidden;
  color: #fff;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: .12;
  pointer-events: none;
}

.cta-section::after {
  content: '';
  position: absolute;
  bottom: -60px;
  right: -60px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(232, 182, 79, .2), transparent 70%);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner .section-tag {
  background: rgba(232, 182, 79, .15);
  color: var(--accent);
}

.cta-inner h2 {
  font-size: 34px;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 16px;
}

.cta-inner h2 span {
  color: var(--accent);
}

.cta-inner p {
  font-size: 15px;
  color: rgba(255, 255, 255, .75);
  margin-bottom: 28px;
  line-height: 1.8;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.cta-feature-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  margin-top: 36px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, .1);
}

.cta-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, .8);
}

.cta-feature i {
  color: var(--accent);
}

/* ===== Footer ===== */
.footer {
  background: var(--dark);
  color: rgba(255, 255, 255, .7);
  padding: 60px 0 0;
  border-top: 3px solid var(--primary);
}

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

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, .5);
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 300px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, .6);
  font-size: 15px;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-3px);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  position: relative;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 30px;
  height: 2px;
  background: var(--accent);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li {
  font-size: 13px;
  color: rgba(255, 255, 255, .55);
}

.footer-col ul li a {
  color: rgba(255, 255, 255, .55);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 20px 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, .45);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }

  .article-card {
    padding: 32px 30px;
  }

  .article-hero h1 {
    font-size: 32px;
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .header-inner {
    height: 70px;
  }

  .nav-toggle {
    display: block;
  }

  .header nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--dark-2);
    padding: 16px 20px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, .3);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height .4s ease, opacity .3s ease, padding .3s ease;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    border-bottom: 1px solid rgba(255, 255, 255, .1);
  }

  .header nav.open {
    max-height: 460px;
    opacity: 1;
    padding: 16px 20px 24px;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .nav-list li {
    width: 100%;
  }

  .nav-link {
    display: block;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 15px;
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-link.active {
    background: rgba(232, 182, 79, .12);
  }

  .nav-cta {
    margin-left: 0;
    padding-left: 0;
    border-left: 0;
    margin-top: 12px;
    text-align: center;
  }

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

  .article-hero {
    padding: 54px 0 48px;
  }

  .article-hero h1 {
    font-size: 26px;
  }

  .article-meta-row {
    gap: 8px;
  }

  .meta-chip {
    font-size: 12px;
    padding: 5px 10px;
  }

  .article-section {
    padding: 48px 0 40px;
  }

  .article-card {
    padding: 24px 20px;
    border-radius: var(--radius-lg);
  }

  .author-box {
    flex-direction: column;
    text-align: center;
  }

  .author-info h4 {
    font-size: 15px;
  }

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

  .cta-section {
    padding: 56px 0;
  }

  .cta-inner h2 {
    font-size: 26px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

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

@media (max-width: 520px) {
  .brand {
    font-size: 17px;
  }

  .brand-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .article-hero h1 {
    font-size: 22px;
  }

  .hero-badge {
    font-size: 12px;
    padding: 5px 10px;
  }

  .meta-chip {
    font-size: 11px;
    padding: 4px 8px;
  }

  .article-content h2 {
    font-size: 20px;
  }

  .article-content {
    font-size: 15px;
    line-height: 1.85;
  }

  .btn {
    padding: 11px 20px;
    font-size: 14px;
  }

  .btn-sm {
    padding: 8px 14px;
    font-size: 13px;
  }

  .section-head h2 {
    font-size: 24px;
  }

  .cta-inner h2 {
    font-size: 22px;
  }

  .cta-buttons {
    flex-direction: column;
  }

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

  .article-toolbar {
    flex-direction: column;
    gap: 12px;
  }

  .sidebar-card {
    padding: 20px;
  }
}

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