:root {
  --brand-deep: #1E3A5F;
  --brand-mid: #2B5A8C;
  --brand-light: #3B7DD8;
  --brand-soft: #E8F0FE;
  --accent: #FF6B9D;
  --accent-soft: #FFE4EF;
  --bg-page: #F7F9FC;
  --bg-card: #FFFFFF;
  --bg-alt: #EEF3FA;
  --text-primary: #17202A;
  --text-secondary: #2C3E50;
  --text-muted: #4A5B6E;
  --text-inverse: #FFFFFF;
  --border-color: #D5DFE9;
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.4);
  --shadow-sm: 0 2px 8px rgba(30, 58, 95, 0.07);
  --shadow-md: 0 4px 16px rgba(30, 58, 95, 0.10);
  --shadow-lg: 0 10px 32px rgba(30, 58, 95, 0.14);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-base);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.dark-mode {
  --bg-page: #0F172A;
  --bg-card: #1E293B;
  --bg-alt: #243447;
  --text-primary: #F1F5F9;
  --text-secondary: #E2E8F0;
  --text-muted: #CBD5E1;
  --border-color: #334155;
  --brand-soft: #1E3A5F;
  --accent-soft: #3D1F2E;
  --glass-bg: rgba(30, 41, 59, 0.72);
  --glass-border: rgba(148, 163, 184, 0.25);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 32px rgba(0, 0, 0, 0.5);
}

h1, h2, h3, h4 {
  line-height: 1.4;
  font-weight: 700;
  color: var(--text-primary);
}

h1 { font-size: 2.2rem; color: var(--brand-deep); }
h2 { font-size: 1.75rem; color: var(--brand-deep); }
h3 { font-size: 1.3rem; color: var(--brand-mid); }
h4 { font-size: 1.1rem; color: var(--text-secondary); }

body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3,
body.dark-mode h4 {
  color: #F1F5F9;
}

p {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

a {
  color: var(--brand-light);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--brand-deep);
}

body.dark-mode a:hover {
  color: #93C5FD;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--brand-deep);
}

body.dark-mode .logo {
  color: #F1F5F9;
}

.logo svg {
  width: 36px;
  height: 36px;
  transition: transform 0.3s ease;
}

.logo:hover svg {
  transform: rotate(-8deg) scale(1.08);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  border-radius: 10px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.25s ease;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-link:hover {
  color: var(--brand-deep);
  background: var(--brand-soft);
}

.nav-link:hover::after {
  width: 60%;
}

body.dark-mode .nav-link {
  color: #E2E8F0;
}

body.dark-mode .nav-link:hover {
  color: #FFFFFF;
  background: #1E3A5F;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-box {
  position: relative;
}

.search-input {
  width: 180px;
  padding: 8px 14px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg-page);
  outline: none;
  transition: all 0.3s ease;
}

.search-input:focus {
  border-color: var(--brand-light);
  width: 220px;
  box-shadow: 0 0 0 3px rgba(59, 125, 216, 0.15);
}

.search-input::placeholder {
  color: var(--text-muted);
}

body.dark-mode .search-input {
  background: #243447;
  color: #F1F5F9;
  border-color: #475569;
}

body.dark-mode .search-input::placeholder {
  color: #94A3B8;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  color: var(--text-secondary);
}

.theme-toggle:hover {
  background: var(--brand-soft);
  border-color: var(--brand-light);
  transform: rotate(20deg) scale(1.08);
}

body.dark-mode .theme-toggle {
  color: #E2E8F0;
  border-color: #475569;
  background: #1E293B;
}

body.dark-mode .theme-toggle:hover {
  background: #1E3A5F;
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--text-secondary);
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
}

.mobile-menu-btn:hover {
  background: var(--brand-soft);
}

body.dark-mode .mobile-menu-btn {
  color: #E2E8F0;
  border-color: #475569;
  background: #1E293B;
}

.breadcrumb {
  padding: 14px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--brand-light);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

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

body.dark-mode .breadcrumb,
body.dark-mode .breadcrumb span {
  color: #94A3B8;
}

body.dark-mode .breadcrumb a {
  color: #93C5FD;
}

.banner-section {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  margin-bottom: 40px;
  background: linear-gradient(135deg, #1E3A5F 0%, #2B5A8C 45%, #3B7DD8 100%);
  min-height: 320px;
  box-shadow: var(--shadow-lg);
}

.banner-section::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 107, 157, 0.35) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
  animation: floatBlob 8s ease-in-out infinite;
}

.banner-section::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(59, 125, 216, 0.4) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
  animation: floatBlob 10s ease-in-out infinite reverse;
}

@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.1); }
}

.banner-slide {
  display: none;
  padding: 60px 40px;
  color: #FFFFFF;
  position: relative;
  z-index: 2;
}

.banner-slide.active {
  display: block;
  animation: fadeInUp 0.7s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.banner-slide h2 {
  font-size: 2rem;
  color: #FFFFFF;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.banner-slide p {
  font-size: 1.1rem;
  color: #E8F0FE;
  max-width: 700px;
  margin-bottom: 24px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
}

body.dark-mode .banner-slide h2,
body.dark-mode .banner-slide p {
  color: #FFFFFF;
}

.banner-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 3;
}

.banner-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
}

.banner-dot:hover {
  background: rgba(255, 255, 255, 0.8);
}

.banner-dot.active {
  background: #FFFFFF;
  width: 28px;
  border-radius: 5px;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #3B7DD8, #2B5A8C);
  color: #FFFFFF;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(59, 125, 216, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2B5A8C, #1E3A5F);
  color: #FFFFFF;
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(59, 125, 216, 0.5);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(6px);
}

.btn-outline:hover {
  background: #FFFFFF;
  color: #1E3A5F;
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.3);
}

body.dark-mode .btn-primary {
  background: linear-gradient(135deg, #3B7DD8, #2B5A8C);
  color: #FFFFFF;
}

body.dark-mode .btn-outline {
  border-color: #3B7DD8;
  color: #93C5FD;
}

body.dark-mode .btn-outline:hover {
  background: #3B7DD8;
  color: #FFFFFF;
}

.section {
  padding: 50px 0;
}

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

.section-title {
  font-size: 1.8rem;
  color: var(--brand-deep);
  text-align: center;
  margin-bottom: 12px;
}

body.dark-mode .section-title {
  color: #F1F5F9;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 40px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

body.dark-mode .section-subtitle {
  color: #CBD5E1;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, #3B7DD8, #FF6B9D);
  border-radius: 2px;
  margin: 0 auto 20px;
}

body.dark-mode .section-divider {
  background: linear-gradient(90deg, #3B7DD8, #FF6B9D);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3B7DD8, #FF6B9D);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

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

.card:hover::before {
  transform: scaleX(1);
}

body.dark-mode .card {
  background: #1E293B;
  border-color: #334155;
}

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  transition: transform 0.3s ease;
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(-5deg);
}

.card h3 {
  font-size: 1.2rem;
  color: var(--brand-deep);
  margin-bottom: 10px;
}

.card h4 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

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

body.dark-mode .card h3,
body.dark-mode .card h4 {
  color: #F1F5F9;
}

body.dark-mode .card p {
  color: #CBD5E1;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item {
  padding: 24px 16px;
  border-radius: var(--radius-sm);
  transition: all 0.3s ease;
}

.stat-item:hover {
  background: var(--brand-soft);
  transform: translateY(-4px);
}

body.dark-mode .stat-item:hover {
  background: #1E3A5F;
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, #3B7DD8, #FF6B9D);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

body.dark-mode .stat-label {
  color: #CBD5E1;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.article-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3B7DD8, #FF6B9D);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s ease;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-light);
}

.article-card:hover::after {
  transform: scaleX(1);
}

body.dark-mode .article-card {
  background: #1E293B;
  border-color: #334155;
}

.article-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  gap: 16px;
}

.article-card h3 {
  font-size: 1.1rem;
  color: var(--brand-deep);
  margin-bottom: 10px;
  line-height: 1.5;
}

.article-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  flex: 1;
  margin-bottom: 14px;
}

body.dark-mode .article-card h3 {
  color: #F1F5F9;
}

body.dark-mode .article-card p {
  color: #CBD5E1;
}

body.dark-mode .article-meta {
  color: #94A3B8;
}

.article-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--brand-light);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.25s ease;
}

.article-link:hover {
  color: var(--brand-deep);
  gap: 8px;
}

body.dark-mode .article-link {
  color: #93C5FD;
}

body.dark-mode .article-link:hover {
  color: #FFFFFF;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 12px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--brand-light);
}

.faq-question {
  width: 100%;
  padding: 18px 22px;
  background: var(--bg-card);
  border: none;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.25s ease;
  font-family: inherit;
}

.faq-question:hover {
  background: var(--brand-soft);
}

body.dark-mode .faq-question {
  background: #243447;
  color: #F1F5F9;
}

body.dark-mode .faq-question:hover {
  background: #1E3A5F;
}

.faq-question .arrow {
  transition: transform 0.35s ease;
  font-size: 0.8rem;
  color: var(--brand-light);
}

.faq-item.open .faq-question .arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease, padding 0.3s ease;
  background: var(--bg-alt);
  padding: 0 22px;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 18px 22px;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.8;
}

body.dark-mode .faq-answer {
  background: #1E293B;
}

body.dark-mode .faq-answer p {
  color: #E2E8F0;
}

.howto-step {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 22px;
  position: relative;
  margin-bottom: 16px;
  border-left: 4px solid var(--brand-light);
  transition: all 0.3s ease;
}

.howto-step:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--accent);
}

body.dark-mode .howto-step {
  background: #1E293B;
  border-color: #334155;
  border-left-color: #3B7DD8;
}

.howto-step h4 {
  font-size: 1.05rem;
  color: var(--brand-deep);
  margin-bottom: 8px;
}

.howto-step p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0;
}

body.dark-mode .howto-step h4 {
  color: #F1F5F9;
}

body.dark-mode .howto-step p {
  color: #CBD5E1;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.case-card:hover {
  transform: translateY(-5px) scale(1.01);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

body.dark-mode .case-card {
  background: #1E293B;
  border-color: #334155;
}

.case-card h4 {
  color: var(--brand-deep);
  margin-bottom: 8px;
}

.case-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

body.dark-mode .case-card h4 {
  color: #F1F5F9;
}

body.dark-mode .case-card p {
  color: #CBD5E1;
}

.case-tag {
  display: inline-block;
  padding: 3px 12px;
  background: linear-gradient(135deg, var(--brand-soft), var(--accent-soft));
  color: var(--brand-deep);
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 10px;
}

body.dark-mode .case-tag {
  background: linear-gradient(135deg, #1E3A5F, #3D1F2E);
  color: #93C5FD;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
  position: relative;
}

.testimonial-card::before {
  content: "\201C";
  position: absolute;
  top: 8px;
  right: 20px;
  font-size: 4rem;
  color: var(--brand-soft);
  font-family: Georgia, serif;
  line-height: 1;
  opacity: 0.6;
}

.testimonial-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-light);
}

body.dark-mode .testimonial-card {
  background: #1E293B;
  border-color: #334155;
}

.testimonial-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 14px;
}

.testimonial-card .author {
  font-weight: 600;
  color: var(--brand-mid);
  font-size: 0.9rem;
}

body.dark-mode .testimonial-card p {
  color: #E2E8F0;
}

body.dark-mode .testimonial-card .author {
  color: #93C5FD;
}

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

.contact-item {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
  align-items: flex-start;
  padding: 12px;
  border-radius: var(--radius-sm);
  transition: all 0.3s ease;
}

.contact-item:hover {
  background: var(--brand-soft);
  transform: translateX(4px);
}

body.dark-mode .contact-item:hover {
  background: #1E3A5F;
}

.contact-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin-top: 3px;
}

.contact-item h4 {
  font-size: 0.95rem;
  color: var(--brand-deep);
  margin-bottom: 2px;
}

.contact-item p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin: 0;
}

body.dark-mode .contact-item h4 {
  color: #F1F5F9;
}

body.dark-mode .contact-item p {
  color: #CBD5E1;
}

.site-footer {
  background: linear-gradient(135deg, #1E3A5F 0%, #17202A 100%);
  color: #CBD5E1;
  padding: 50px 0 0;
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3B7DD8, #FF6B9D, #3B7DD8);
}

body.dark-mode .site-footer {
  background: linear-gradient(135deg, #0B1120 0%, #0F172A 100%);
  color: #CBD5E1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 36px;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 1rem;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, #3B7DD8, #FF6B9D);
  border-radius: 2px;
}

body.dark-mode .footer-col h4 {
  color: #F1F5F9;
}

.footer-col p {
  font-size: 0.9rem;
  color: #CBD5E1;
  line-height: 1.8;
}

body.dark-mode .footer-col p {
  color: #CBD5E1;
}

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

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col a {
  color: #CBD5E1;
  font-size: 0.9rem;
  transition: all 0.25s ease;
  display: inline-block;
}

.footer-col a:hover {
  color: #FFFFFF;
  transform: translateX(4px);
}

body.dark-mode .footer-col a {
  color: #CBD5E1;
}

body.dark-mode .footer-col a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  color: #94A3B8;
}

.footer-bottom a {
  color: #94A3B8;
  transition: color 0.25s ease;
}

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

body.dark-mode .footer-bottom {
  border-top-color: rgba(255, 255, 255, 0.08);
  color: #94A3B8;
}

body.dark-mode .footer-bottom a {
  color: #94A3B8;
}

body.dark-mode .footer-bottom a:hover {
  color: #FFFFFF;
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3B7DD8, #2B5A8C);
  color: #FFFFFF;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: linear-gradient(135deg, #2B5A8C, #1E3A5F);
  transform: translateY(-4px) scale(1.08);
  box-shadow: var(--shadow-lg);
}

body.dark-mode .back-to-top {
  background: linear-gradient(135deg, #3B7DD8, #2B5A8C);
  color: #FFFFFF;
}

body.dark-mode .back-to-top:hover {
  background: linear-gradient(135deg, #2B5A8C, #1E3A5F);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.text-highlight {
  color: var(--brand-deep);
  font-weight: 700;
}

body.dark-mode .text-highlight {
  color: #93C5FD;
}

.text-muted-readable {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.card p,
.article-card p,
.faq-answer p,
.howto-step p,
.case-card p,
.testimonial-card p,
.contact-item p,
.footer-col p {
  color: var(--text-secondary);
}

body.dark-mode .card p,
body.dark-mode .article-card p,
body.dark-mode .faq-answer p,
body.dark-mode .howto-step p,
body.dark-mode .case-card p,
body.dark-mode .testimonial-card p,
body.dark-mode .contact-item p,
body.dark-mode .footer-col p {
  color: #CBD5E1;
}

body.dark-mode .card h3,
body.dark-mode .article-card h3,
body.dark-mode .howto-step h4,
body.dark-mode .case-card h4,
body.dark-mode .contact-item h4 {
  color: #F1F5F9;
}

body.dark-mode .card h4 {
  color: #E2E8F0;
}

body.dark-mode .faq-question {
  color: #F1F5F9;
}

body.dark-mode .faq-answer p {
  color: #E2E8F0;
}

body.dark-mode .testimonial-card .author {
  color: #93C5FD;
}

body.dark-mode .case-tag {
  background: linear-gradient(135deg, #1E3A5F, #3D1F2E);
  color: #93C5FD;
}

body.dark-mode .article-meta {
  color: #94A3B8;
}

body.dark-mode .breadcrumb,
body.dark-mode .breadcrumb span {
  color: #94A3B8;
}

body.dark-mode .breadcrumb a {
  color: #93C5FD;
}

body.dark-mode .section-subtitle {
  color: #CBD5E1;
}

body.dark-mode .stat-label {
  color: #CBD5E1;
}

body.dark-mode .stat-number {
  background: linear-gradient(135deg, #93C5FD, #FF6B9D);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.dark-mode .footer-bottom {
  color: #94A3B8;
}

body.dark-mode .footer-bottom a {
  color: #94A3B8;
}

body.dark-mode .footer-bottom a:hover {
  color: #FFFFFF;
}

body.dark-mode .btn-outline {
  color: #93C5FD;
  border-color: #3B7DD8;
}

body.dark-mode .btn-outline:hover {
  background: #3B7DD8;
  color: #FFFFFF;
}

body.dark-mode .article-link {
  color: #93C5FD;
}

body.dark-mode .article-link:hover {
  color: #FFFFFF;
}

body.dark-mode .theme-toggle {
  color: #E2E8F0;
  border-color: #475569;
}

body.dark-mode .theme-toggle:hover {
  background: #1E3A5F;
}

body.dark-mode .mobile-menu-btn {
  color: #E2E8F0;
  border-color: #475569;
}

body.dark-mode .back-to-top {
  background: linear-gradient(135deg, #3B7DD8, #2B5A8C);
  color: #FFFFFF;
}

body.dark-mode .back-to-top:hover {
  background: linear-gradient(135deg, #2B5A8C, #1E3A5F);
}

@media (max-width: 992px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.35rem; }

  .nav-menu {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    gap: 4px;
  }

  .nav-menu.open {
    display: flex;
    animation: slideDown 0.3s ease;
  }

  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .mobile-menu-btn {
    display: flex;
  }

  .search-input {
    width: 140px;
  }

  .search-input:focus {
    width: 160px;
  }

  .grid-3,
  .grid-2,
  .grid-4 {
    grid-template-columns: 1fr;
  }

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

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

  .banner-slide {
    padding: 40px 24px;
  }

  .banner-slide h2 {
    font-size: 1.4rem;
  }

  .banner-slide p {
    font-size: 0.95rem;
  }

  .banner-section {
    min-height: 280px;
    border-radius: var(--radius);
  }
}

@media (max-width: 480px) {
  .header-actions .search-box {
    display: none;
  }

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

  .stat-number {
    font-size: 1.8rem;
  }

  .banner-slide {
    padding: 32px 18px;
  }

  .banner-slide h2 {
    font-size: 1.2rem;
  }

  .banner-slide p {
    font-size: 0.9rem;
  }

  .btn {
    padding: 10px 22px;
    font-size: 0.9rem;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

::selection {
  background: var(--brand-light);
  color: #FFFFFF;
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-alt);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #3B7DD8, #2B5A8C);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #2B5A8C, #1E3A5F);
}

body.dark-mode ::-webkit-scrollbar-track {
  background: #0F172A;
}

body.dark-mode ::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #3B7DD8, #2B5A8C);
}