:root {
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-nav: rgba(255, 255, 255, 0.82);
  --bg-footer: #1a2e2a;
  --bg-hero: linear-gradient(135deg, #0b2b26 0%, #1a4a3e 60%, #2a6b58 100%);
  --bg-section-alt: #f1f5f9;
  --bg-tag: #e6f0ec;
  --bg-btn-primary: #1a7a5e;
  --bg-btn-primary-hover: #0f5e46;
  --bg-btn-secondary: #e2e8f0;
  --bg-input: #ffffff;
  --bg-faq-open: #f0f7f4;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.55);
  --text-primary: #17202a;
  --text-secondary: #1f2937;
  --text-muted: #334155;
  --text-light: #475569;
  --text-inverse: #f8fafc;
  --text-heading: #0b2b26;
  --text-link: #0f6b4f;
  --text-link-hover: #0a4f3a;
  --text-btn-primary: #ffffff;
  --text-btn-secondary: #1f2937;
  --text-nav: #1f2937;
  --text-footer: #e2e8f0;
  --text-footer-muted: #cbd5e1;
  --border-color: #cbd5e1;
  --border-light: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 0 3px rgba(26, 122, 94, 0.15);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.25s ease;
  --hero-text: #f8fafc;
  --hero-text-muted: #d1e0db;
  --tag-text: #1a4a3e;
  --badge-bg: #1a7a5e;
  --badge-text: #ffffff;
}

[data-theme="dark"] {
  --bg-body: #0f1419;
  --bg-surface: #1a2329;
  --bg-card: #1e2a32;
  --bg-nav: rgba(20, 29, 35, 0.82);
  --bg-footer: #0b1114;
  --bg-hero: linear-gradient(135deg, #0a1a16 0%, #12332b 60%, #1a4a3e 100%);
  --bg-section-alt: #1a2329;
  --bg-tag: #1a3a32;
  --bg-btn-primary: #1f8f6e;
  --bg-btn-primary-hover: #2aad86;
  --bg-btn-secondary: #2d3a42;
  --bg-input: #1e2a32;
  --bg-faq-open: #1a2e28;
  --bg-glass: rgba(30, 42, 50, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.12);
  --text-primary: #e5e7eb;
  --text-secondary: #e2e8f0;
  --text-muted: #cbd5e1;
  --text-light: #94a3b8;
  --text-inverse: #0f1419;
  --text-heading: #f8fafc;
  --text-link: #5eccaa;
  --text-link-hover: #8ae0c4;
  --text-btn-primary: #ffffff;
  --text-btn-secondary: #e5e7eb;
  --text-nav: #e2e8f0;
  --text-footer: #e2e8f0;
  --text-footer-muted: #94a3b8;
  --border-color: #334155;
  --border-light: #2d3a42;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 0 3px rgba(31, 143, 110, 0.25);
  --hero-text: #f8fafc;
  --hero-text-muted: #b8d4cb;
  --tag-text: #b8e0d0;
  --badge-bg: #1f8f6e;
  --badge-text: #ffffff;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  transition: background-color var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background-color: rgba(26, 122, 94, 0.25);
  color: var(--text-heading);
}

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

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

::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 6px;
  border: 2px solid var(--bg-section-alt);
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--text-light);
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-nav);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  backdrop-filter: blur(16px) saturate(180%);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition), box-shadow var(--transition);
  border-bottom: 1px solid var(--border-light);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--text-heading);
  transition: color var(--transition), transform var(--transition);
  letter-spacing: 0.5px;
}

.nav-logo:hover {
  transform: scale(1.03);
}

.nav-logo svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.nav-logo:hover svg {
  transform: rotate(-6deg) scale(1.06);
}

.nav-logo span {
  color: var(--text-heading);
}

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

.nav-menu a {
  display: block;
  padding: 8px 14px;
  text-decoration: none;
  color: var(--text-nav);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
  white-space: nowrap;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--bg-btn-primary);
  border-radius: 2px;
  transition: width var(--transition), left var(--transition);
}

.nav-menu a:hover,
.nav-menu a:focus {
  background-color: var(--bg-tag);
  color: var(--text-link);
}

.nav-menu a:hover::after,
.nav-menu a:focus::after {
  width: 60%;
  left: 20%;
}

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

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-nav);
  transition: background-color var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
  font-size: 1.2rem;
  line-height: 1;
}

.theme-toggle:hover {
  background-color: var(--bg-tag);
  border-color: var(--text-link);
  color: var(--text-link);
  transform: rotate(20deg) scale(1.08);
}

.search-box {
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 0 4px 0 16px;
  transition: border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
}

.search-box:focus-within {
  border-color: var(--text-link);
  box-shadow: var(--shadow-glow);
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  padding: 8px 8px 8px 0;
  font-size: 0.9rem;
  color: var(--text-primary);
  width: 150px;
  transition: color var(--transition), width var(--transition);
}

.search-box input::placeholder {
  color: var(--text-light);
  opacity: 1;
}

.search-box button {
  background-color: var(--bg-btn-primary);
  border: none;
  border-radius: 20px;
  padding: 6px 14px;
  color: var(--text-btn-primary);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.search-box button:hover {
  background-color: var(--bg-btn-primary-hover);
  transform: scale(1.04);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-nav);
  font-size: 1.5rem;
  line-height: 1;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition);
}

.mobile-menu-btn:hover {
  background-color: var(--bg-tag);
  color: var(--text-link);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  background-color: var(--bg-nav);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  padding: 16px 20px;
  z-index: 999;
  flex-direction: column;
  gap: 4px;
  transition: background-color var(--transition);
  animation: slideDown 0.3s ease;
}

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

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

.mobile-menu a {
  display: block;
  padding: 12px 16px;
  text-decoration: none;
  color: var(--text-nav);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition), color var(--transition), padding-left var(--transition);
}

.mobile-menu a:hover {
  background-color: var(--bg-tag);
  color: var(--text-link);
  padding-left: 22px;
}

.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px 0;
  font-size: 0.85rem;
  color: var(--text-light);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.breadcrumb a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
}

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

.hero {
  background: var(--bg-hero);
  color: var(--hero-text);
  padding: 80px 20px 90px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: background var(--transition);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(94, 204, 170, 0.18) 0%, transparent 70%);
  pointer-events: none;
  animation: heroGlow 12s ease-in-out infinite alternate;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  right: -10%;
  width: 50%;
  height: 150%;
  background: radial-gradient(circle, rgba(42, 173, 134, 0.14) 0%, transparent 70%);
  pointer-events: none;
  animation: heroGlow 15s ease-in-out infinite alternate-reverse;
}

@keyframes heroGlow {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(30px, -20px) scale(1.15); }
}

.hero-container {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.25;
  color: var(--hero-text);
  letter-spacing: -0.5px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
  animation: fadeInUp 0.8s ease both;
}

.hero p {
  font-size: 1.15rem;
  color: var(--hero-text-muted);
  max-width: 720px;
  margin: 0 auto 30px;
  line-height: 1.8;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 0.8s ease 0.15s both;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.3s both;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.btn {
  display: inline-block;
  padding: 13px 34px;
  border-radius: 28px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background-color var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.5s ease, height 0.5s ease;
}

.btn:hover::after {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background-color: var(--bg-btn-primary);
  color: var(--text-btn-primary);
  box-shadow: 0 4px 16px rgba(26, 122, 94, 0.4);
}

.btn-primary:hover {
  background-color: var(--bg-btn-primary-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(26, 122, 94, 0.5);
}

.btn-outline {
  background-color: rgba(248, 250, 252, 0.08);
  color: var(--hero-text);
  border: 2px solid rgba(248, 250, 252, 0.55);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background-color: rgba(248, 250, 252, 0.18);
  border-color: var(--hero-text);
  color: var(--hero-text);
  transform: translateY(-3px);
}

.banner-carousel {
  max-width: 1200px;
  margin: -50px auto 0;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

.carousel-track {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background-color: var(--bg-card);
  transition: background-color var(--transition);
}

.carousel-slide {
  display: none;
  padding: 40px 44px;
  background-color: var(--bg-glass);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius);
  transition: background-color var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.carousel-slide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--bg-btn-primary), var(--text-link-hover));
  border-radius: 4px 0 0 4px;
}

.carousel-slide.active {
  display: block;
  animation: fadeSlide 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(14px) scale(0.99); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.carousel-slide h3 {
  font-size: 1.35rem;
  color: var(--text-heading);
  margin-bottom: 10px;
  font-weight: 700;
  line-height: 1.4;
}

.carousel-slide p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}

.carousel-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background-color: var(--border-color);
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition), width var(--transition);
  padding: 0;
}

.carousel-dots button:hover {
  background-color: var(--text-light);
}

.carousel-dots button.active {
  background-color: var(--bg-btn-primary);
  transform: scale(1.3);
  width: 26px;
  border-radius: 6px;
}

.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 20px;
}

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

.section-alt .section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 20px;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.8;
}

.section-header .divider {
  width: 64px;
  height: 4px;
  background: linear-gradient(to right, var(--bg-btn-primary), var(--text-link-hover));
  border-radius: 2px;
  margin: 18px auto 0;
  transition: width var(--transition);
}

.section-header:hover .divider {
  width: 96px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--bg-btn-primary), var(--text-link-hover));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--bg-btn-primary);
}

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

.card h3 {
  font-size: 1.15rem;
  color: var(--text-heading);
  margin-bottom: 10px;
  font-weight: 700;
  line-height: 1.4;
}

.card h4 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 600;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
}

.card-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 18px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-tag);
  transition: background-color var(--transition), transform var(--transition);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(-4deg);
  background-color: var(--bg-btn-primary);
}

.card-icon svg {
  width: 26px;
  height: 26px;
  transition: filter var(--transition);
}

.card:hover .card-icon svg {
  filter: brightness(0) invert(1);
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  background-color: var(--bg-tag);
  color: var(--tag-text);
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.tag:hover {
  transform: translateY(-2px);
}

.badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 14px;
  font-size: 0.75rem;
  font-weight: 700;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
  box-shadow: 0 2px 8px rgba(26, 122, 94, 0.3);
}

.badge:hover {
  transform: translateY(-2px) scale(1.05);
}

.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.article-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.article-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--bg-btn-primary), var(--text-link-hover));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition);
}

.article-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--bg-btn-primary);
}

.article-item:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.82rem;
  color: var(--text-light);
}

.article-item h3 {
  font-size: 1.1rem;
  color: var(--text-heading);
  margin-bottom: 10px;
  font-weight: 700;
  line-height: 1.5;
  transition: color var(--transition);
}

.article-item:hover h3 {
  color: var(--text-link);
}

.article-item p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.75;
  flex: 1;
}

.article-link {
  display: inline-block;
  margin-top: 14px;
  color: var(--text-link);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: color var(--transition), transform var(--transition);
}

.article-link:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
  transform: translateX(4px);
}

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

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

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

.faq-item.open {
  background-color: var(--bg-faq-open);
  border-color: var(--text-link);
  box-shadow: var(--shadow-md);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-heading);
  text-align: left;
  transition: color var(--transition), background-color var(--transition);
  gap: 16px;
  line-height: 1.5;
  font-family: inherit;
}

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

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--text-muted);
  transition: transform var(--transition), color var(--transition), background-color var(--transition);
  line-height: 1;
  border-radius: 50%;
  background-color: var(--bg-tag);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--text-btn-primary);
  background-color: var(--bg-btn-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.22, 1, 0.36, 1), padding 0.4s ease;
  padding: 0 22px;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 22px 20px;
}

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

.steps {
  max-width: 860px;
  margin: 0 auto;
  counter-reset: step;
}

.step-item {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  position: relative;
}

.step-item:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 23px;
  top: 54px;
  bottom: -28px;
  width: 2px;
  background: linear-gradient(to bottom, var(--bg-btn-primary), var(--border-color));
  transition: background var(--transition);
}

.step-number {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bg-btn-primary), var(--text-link-hover));
  color: var(--text-btn-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 12px rgba(26, 122, 94, 0.3);
}

.step-item:hover .step-number {
  transform: scale(1.1);
  box-shadow: 0 6px 18px rgba(26, 122, 94, 0.45);
}

.step-content h4 {
  font-size: 1.05rem;
  color: var(--text-heading);
  margin-bottom: 6px;
  font-weight: 700;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.table-wrap:hover {
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-card);
  transition: background-color var(--transition);
}

th {
  background-color: var(--bg-tag);
  color: var(--text-heading);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 14px 18px;
  text-align: left;
  border-bottom: 2px solid var(--border-color);
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

td {
  padding: 13px 18px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
  transition: color var(--transition), border-color var(--transition), background-color var(--transition);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background-color: var(--bg-section-alt);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.contact-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--bg-btn-primary);
}

.contact-item h4 {
  font-size: 1rem;
  color: var(--text-heading);
  margin-bottom: 8px;
  font-weight: 700;
}

.contact-item p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

.contact-item a {
  color: var(--text-link);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition);
}

.contact-item a:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
}

.author-box {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background-color: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius);
  padding: 26px;
  transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

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

.author-avatar {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bg-btn-primary), var(--text-link-hover));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-btn-primary);
  transition: background var(--transition), color var(--transition), transform var(--transition);
  box-shadow: 0 4px 14px rgba(26, 122, 94, 0.35);
}

.author-box:hover .author-avatar {
  transform: scale(1.08) rotate(-5deg);
}

.author-info h4 {
  font-size: 1rem;
  color: var(--text-heading);
  margin-bottom: 4px;
  font-weight: 700;
}

.author-info .role {
  font-size: 0.85rem;
  color: var(--text-link);
  font-weight: 600;
  margin-bottom: 8px;
}

.author-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer {
  background-color: var(--bg-footer);
  color: var(--text-footer);
  padding: 56px 20px 30px;
  transition: background-color var(--transition), color var(--transition);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--bg-btn-primary), #5eccaa, var(--bg-btn-primary));
}

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

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 36px;
  margin-bottom: 36px;
}

.footer-col h4 {
  font-size: 1rem;
  color: var(--text-footer);
  margin-bottom: 16px;
  font-weight: 700;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background-color: var(--bg-btn-primary);
  border-radius: 2px;
}

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

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

.footer-col ul li a {
  color: var(--text-footer-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition), padding-left var(--transition);
}

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

.footer-col p {
  color: var(--text-footer-muted);
  font-size: 0.88rem;
  line-height: 1.8;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-footer-muted);
}

.footer-bottom a {
  color: var(--text-footer-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-bottom a:hover {
  color: var(--text-footer);
  text-decoration: underline;
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bg-btn-primary), var(--text-link-hover));
  color: var(--text-btn-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
  z-index: 900;
}

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

.back-to-top:hover {
  transform: translateY(-5px) scale(1.08);
  box-shadow: 0 8px 24px rgba(26, 122, 94, 0.45);
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

.stat-number {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--text-heading);
  line-height: 1.2;
  transition: color var(--transition);
  background: linear-gradient(135deg, var(--text-heading), var(--text-link));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
  transition: color var(--transition);
}

.stat-item {
  text-align: center;
  padding: 24px 20px;
  border-radius: var(--radius);
  transition: background-color var(--transition), transform var(--transition);
}

.stat-item:hover {
  background-color: var(--bg-tag);
  transform: translateY(-3px);
}

.search-highlight {
  background-color: #fef08a;
  color: #17202a;
  padding: 0 2px;
  border-radius: 3px;
}

[data-theme="dark"] .search-highlight {
  background-color: #b45309;
  color: #f8fafc;
}

@media (max-width: 900px) {
  .nav-menu {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .search-box input {
    width: 100px;
  }
  .hero h1 {
    font-size: 2.1rem;
  }
  .hero p {
    font-size: 1rem;
  }
  .section-header h2 {
    font-size: 1.8rem;
  }
}

@media (max-width: 640px) {
  .nav-container {
    height: 60px;
  }
  .mobile-menu {
    top: 60px;
  }
  .nav-logo {
    font-size: 1.1rem;
  }
  .nav-logo svg {
    width: 30px;
    height: 30px;
  }
  .search-box {
    display: none;
  }
  .hero {
    padding: 56px 16px 70px;
  }
  .hero h1 {
    font-size: 1.65rem;
  }
  .hero p {
    font-size: 0.95rem;
  }
  .section-header h2 {
    font-size: 1.5rem;
  }
  .section {
    padding: 44px 16px;
  }
  .section-alt .section-inner {
    padding: 44px 16px;
  }
  .carousel-slide {
    padding: 26px 20px;
  }
  .carousel-slide h3 {
    font-size: 1.1rem;
  }
  .carousel-slide p {
    font-size: 0.9rem;
  }
  .grid-3,
  .grid-2,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .article-list {
    grid-template-columns: 1fr;
  }
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
  .author-box {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .step-item {
    gap: 14px;
  }
  .step-number {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  .step-item:not(:last-child)::after {
    left: 20px;
    top: 48px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .card {
    padding: 24px 20px;
  }
  .stat-number {
    font-size: 1.8rem;
  }
}

@media (max-width: 400px) {
  .hero h1 {
    font-size: 1.4rem;
  }
  .btn {
    padding: 11px 24px;
    font-size: 0.9rem;
  }
  .section-header h2 {
    font-size: 1.3rem;
  }
}

@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;
  }
}

@media print {
  .navbar,
  .back-to-top,
  .theme-toggle,
  .search-box,
  .mobile-menu-btn,
  .hero::before,
  .hero::after,
  .footer::before {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  .card,
  .article-item,
  .faq-item,
  .contact-item {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}