:root {
  --primary-color: #1a2b4c;
  --primary-light: #2d4a7a;
  --secondary-color: #c44536;
  --secondary-light: #d45a4a;
  --accent-color: #e8b84b;
  --accent-glow: rgba(232, 184, 75, 0.35);
  --bg-light: #f8f9fc;
  --bg-white: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-strong: rgba(255, 255, 255, 0.88);
  --text-dark: #1d1d1f;
  --text-medium: #4a4a4a;
  --text-light: #6e6e73;
  --border-color: #e5e7eb;
  --border-glass: rgba(255, 255, 255, 0.4);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 8px 32px rgba(26, 43, 76, 0.18);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--text-dark);
  background-color: var(--bg-light);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(26, 43, 76, 0.04) 0%, transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(196, 69, 54, 0.04) 0%, transparent 45%);
  background-attachment: fixed;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.dark-mode {
  --bg-light: #0f1115;
  --bg-white: #1a1d23;
  --bg-glass: rgba(26, 29, 35, 0.78);
  --bg-glass-strong: rgba(26, 29, 35, 0.92);
  --text-dark: #e8e8e8;
  --text-medium: #b0b0b0;
  --text-light: #888888;
  --border-color: #2a2e36;
  --border-glass: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 8px 32px rgba(0, 0, 0, 0.5);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(45, 74, 122, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(196, 69, 54, 0.08) 0%, transparent 45%);
}

::selection {
  background: var(--secondary-color);
  color: #fff;
}

a {
  color: inherit;
}

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

ul {
  list-style: none;
}

/* ---------- 导航吸顶 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass-strong);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), background var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-color);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

body.dark-mode .nav-logo {
  color: #dce6f5;
}

.nav-logo:hover {
  transform: translateY(-1px);
}

.nav-logo svg {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  transition: transform var(--transition-bounce);
}

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

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

.nav-links a {
  position: relative;
  text-decoration: none;
  color: var(--text-medium);
  font-size: 0.925rem;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  font-weight: 500;
  white-space: nowrap;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.nav-links a:hover {
  color: var(--primary-color);
  background: rgba(26, 43, 76, 0.06);
}

body.dark-mode .nav-links a:hover {
  color: #dce6f5;
  background: rgba(255, 255, 255, 0.06);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: 40px;
  padding: 4px 4px 4px 16px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box:focus-within {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(26, 43, 76, 0.1);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.875rem;
  color: var(--text-dark);
  width: 150px;
  font-family: var(--font-sans);
}

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

.search-box button {
  border: none;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: #fff;
  border-radius: 40px;
  padding: 6px 16px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-sans);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.search-box button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(26, 43, 76, 0.3);
}

.search-box button:active {
  transform: translateY(0);
}

.theme-toggle,
.mobile-menu-btn {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-medium);
  transition: all var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover,
.mobile-menu-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: rotate(15deg) scale(1.05);
  box-shadow: var(--shadow-sm);
}

.mobile-menu-btn {
  display: none;
}

.mobile-menu-btn:hover {
  transform: scale(1.05);
}

/* ---------- 移动端菜单 ---------- */
.mobile-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--bg-glass-strong);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  z-index: 999;
  padding: 16px 24px;
  flex-direction: column;
  gap: 4px;
  animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.mobile-nav a {
  text-decoration: none;
  color: var(--text-medium);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: all var(--transition);
}

.mobile-nav a:hover {
  background: var(--bg-light);
  color: var(--primary-color);
  padding-left: 22px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 0.85rem;
  color: var(--text-light);
}

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

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

.breadcrumb span {
  margin: 0 8px;
}

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

/* ---------- Banner 轮播（渐变 + 毛玻璃） ---------- */
.banner-section {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  max-width: 1200px;
  margin: 0 auto 48px;
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}

.banner-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.25));
  z-index: 2;
  pointer-events: none;
}

.banner-slider {
  display: flex;
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.banner-slide {
  min-width: 100%;
  position: relative;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
}

.banner-slide:nth-child(1) {
  background: linear-gradient(135deg, #1a2b4c 0%, #2d4a7a 55%, #3a5a8a 100%);
}

.banner-slide:nth-child(2) {
  background: linear-gradient(135deg, #8b2e2e 0%, #c44536 55%, #d45a4a 100%);
}

.banner-slide:nth-child(3) {
  background: linear-gradient(135deg, #1e3d32 0%, #2d6a4e 55%, #3a7a5e 100%);
}

.banner-slide::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.08) 0%, transparent 40%);
  pointer-events: none;
}

.banner-content {
  position: relative;
  z-index: 3;
  text-align: center;
  color: #fff;
  max-width: 720px;
  padding: 32px 28px;
  background: rgba(255, 255, 255, 0.08);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  backdrop-filter: blur(12px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
  animation: bannerFadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
}

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

.banner-content h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

.banner-content p {
  font-size: 1.05rem;
  opacity: 0.92;
  margin-bottom: 26px;
  line-height: 1.7;
}

.banner-content .cta-btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-color), #f0c860);
  color: #1a2b4c;
  padding: 13px 34px;
  border-radius: 40px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  box-shadow: 0 6px 20px rgba(232, 184, 75, 0.35);
}

.banner-content .cta-btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 32px rgba(232, 184, 75, 0.5);
}

.banner-content .cta-btn:active {
  transform: translateY(-1px) scale(0.99);
}

.banner-indicators {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 4;
}

.banner-indicators button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.6);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}

.banner-indicators button.active {
  background: #fff;
  border-color: #fff;
  transform: scale(1.3);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.2);
}

/* ---------- 数字统计 ---------- */
.stats-section {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.stat-card {
  position: relative;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  backdrop-filter: blur(14px) saturate(160%);
  border-radius: var(--radius-md);
  padding: 30px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-glass);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.stat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(26, 43, 76, 0.2);
}

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

.stat-number {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--primary-color);
  letter-spacing: -0.02em;
}

body.dark-mode .stat-number {
  background: linear-gradient(135deg, #7ea3d8, #e0705e);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-light);
  margin-top: 8px;
  font-weight: 500;
}

/* ---------- 通用区块 ---------- */
.section {
  margin-bottom: 64px;
}

.section-header {
  margin-bottom: 34px;
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 8px;
  position: relative;
  padding-left: 18px;
  letter-spacing: -0.02em;
}

.section-header h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 5px;
  width: 4px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--secondary-color), var(--accent-color));
}

.section-header p {
  color: var(--text-light);
  font-size: 0.95rem;
  padding-left: 18px;
}

/* ---------- 卡片网格 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

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

.article-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  box-shadow: inset 0 0 0 1px transparent;
  transition: box-shadow var(--transition);
  pointer-events: none;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(196, 69, 54, 0.25);
}

.article-card:hover::after {
  box-shadow: inset 0 0 0 1px rgba(196, 69, 54, 0.15);
}

.article-card-img {
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, #e8eef5 0%, #d0dae8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

body.dark-mode .article-card-img {
  background: linear-gradient(135deg, #232830 0%, #1a1f27 100%);
}

.article-card-img svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.article-card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
  line-height: 1.45;
  transition: color var(--transition);
}

.article-card:hover .article-card-body h3 {
  color: var(--secondary-color);
}

.article-card-body .meta {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-bottom: 10px;
}

.article-card-body p {
  font-size: 0.875rem;
  color: var(--text-medium);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 16px;
}

.article-card-body .read-more {
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.85rem;
  transition: color var(--transition), transform var(--transition);
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-card-body .read-more:hover {
  color: var(--primary-color);
  transform: translateX(4px);
}

/* ---------- FAQ ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: rgba(26, 43, 76, 0.15);
}

.faq-item.open {
  box-shadow: var(--shadow-md);
  border-color: rgba(196, 69, 54, 0.25);
}

.faq-question {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-dark);
  transition: background var(--transition), color var(--transition);
  user-select: none;
  gap: 16px;
}

.faq-question:hover {
  background: var(--bg-light);
}

.faq-item.open .faq-question {
  color: var(--secondary-color);
}

.faq-question .icon {
  font-size: 1.25rem;
  color: var(--text-light);
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-light);
  line-height: 1;
}

.faq-item.open .faq-question .icon {
  transform: rotate(45deg);
  color: var(--secondary-color);
  background: rgba(196, 69, 54, 0.1);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-medium);
  font-size: 0.9rem;
  line-height: 1.75;
}

.faq-item.open .faq-answer {
  max-height: 700px;
  padding: 0 24px 22px;
}

/* ---------- HowTo ---------- */
.howto-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.howto-step {
  display: flex;
  gap: 20px;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 26px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.howto-step:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(26, 43, 76, 0.18);
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.05rem;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(26, 43, 76, 0.25);
  transition: transform var(--transition-bounce);
}

.howto-step:hover .step-number {
  transform: scale(1.1) rotate(-6deg);
}

.step-content h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.step-content p {
  font-size: 0.875rem;
  color: var(--text-medium);
  line-height: 1.65;
}

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

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

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(196, 69, 54, 0.2);
}

.contact-card svg {
  width: 36px;
  height: 36px;
  margin: 0 auto 14px;
  color: var(--primary-color);
  transition: transform var(--transition-bounce), color var(--transition);
}

.contact-card:hover svg {
  transform: scale(1.12);
  color: var(--secondary-color);
}

.contact-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.contact-card p {
  font-size: 0.85rem;
  color: var(--text-medium);
  line-height: 1.6;
}

.contact-card a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* ---------- 页脚 ---------- */
.footer {
  position: relative;
  background: linear-gradient(160deg, #1a2b4c 0%, #142138 100%);
  color: rgba(255, 255, 255, 0.8);
  padding: 56px 0 28px;
  margin-top: 64px;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--secondary-color), var(--accent-color), var(--primary-light));
}

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

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

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

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

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

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition), padding-left var(--transition);
  display: inline-block;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* ---------- 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.9);
  transition: all var(--transition);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-to-top:hover {
  background: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 10px 28px rgba(196, 69, 54, 0.4);
}

.back-to-top:active {
  transform: translateY(-2px) scale(1.02);
}

/* ---------- 滚动动画 ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 内联样式补充的通用元素美化 ---------- */
.section > div[style*="background: var(--bg-white)"],
.section > div[style*="background:var(--bg-white)"] {
  border-radius: var(--radius-md) !important;
  box-shadow: var(--shadow-sm) !important;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.section > div[style*="background: var(--bg-white)"]:hover,
.section > div[style*="background:var(--bg-white)"]:hover {
  box-shadow: var(--shadow-md) !important;
}

.section h3[style] {
  letter-spacing: -0.01em;
}

.section ul[style*="list-style: disc"] li {
  margin-bottom: 6px;
}

.section ul[style*="list-style: disc"] li::marker {
  color: var(--secondary-color);
}

/* 网站地图内链 hover */
.section a[style*="color: var(--text-medium)"] {
  transition: color var(--transition), padding-left var(--transition);
  display: inline-block;
}

.section a[style*="color: var(--text-medium)"]:hover {
  color: var(--secondary-color) !important;
  padding-left: 4px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .nav-links {
    gap: 0;
  }

  .nav-links a {
    padding: 8px 10px;
    font-size: 0.88rem;
  }

  .search-box input {
    width: 120px;
  }
}

@media (max-width: 900px) {
  .stats-section {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .nav-links {
    display: none;
  }

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

  .search-box input {
    width: 100px;
  }

  .banner-slide {
    height: 320px;
    padding: 32px 24px;
  }

  .banner-content {
    padding: 26px 22px;
  }

  .banner-content h2 {
    font-size: 1.6rem;
  }

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

  .section-header h2 {
    font-size: 1.55rem;
  }

  .howto-step:hover {
    transform: translateY(-4px);
  }
}

@media (max-width: 600px) {
  html {
    font-size: 15px;
  }

  .nav-container {
    padding: 0 16px;
    height: 58px;
  }

  .mobile-nav {
    top: 58px;
    padding: 12px 16px;
  }

  .nav-logo {
    font-size: 1.1rem;
  }

  .nav-logo svg {
    width: 28px;
    height: 28px;
  }

  .breadcrumb {
    padding: 12px 16px;
    font-size: 0.78rem;
  }

  .container {
    padding: 0 16px;
  }

  .banner-section {
    border-radius: var(--radius-lg);
    margin-bottom: 36px;
  }

  .banner-slide {
    height: 280px;
    padding: 24px 18px;
  }

  .banner-content {
    padding: 22px 18px;
    border-radius: var(--radius-md);
  }

  .banner-content h2 {
    font-size: 1.28rem;
    margin-bottom: 10px;
  }

  .banner-content p {
    font-size: 0.82rem;
    margin-bottom: 18px;
  }

  .banner-content .cta-btn {
    padding: 10px 26px;
    font-size: 0.85rem;
  }

  .stats-section {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 40px;
  }

  .stat-card {
    padding: 22px 14px;
    border-radius: var(--radius-sm);
  }

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

  .stat-label {
    font-size: 0.78rem;
  }

  .search-box {
    display: none;
  }

  .section {
    margin-bottom: 48px;
  }

  .section-header {
    margin-bottom: 24px;
  }

  .section-header h2 {
    font-size: 1.32rem;
    padding-left: 14px;
  }

  .section-header p {
    font-size: 0.85rem;
    padding-left: 14px;
  }

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

  .article-card-body {
    padding: 18px;
  }

  .faq-question {
    padding: 15px 18px;
    font-size: 0.88rem;
  }

  .faq-answer {
    padding: 0 18px;
    font-size: 0.85rem;
  }

  .faq-item.open .faq-answer {
    padding: 0 18px 18px;
  }

  .howto-step {
    flex-direction: column;
    gap: 14px;
    padding: 20px;
  }

  .howto-step:hover {
    transform: translateY(-3px);
  }

  .step-number {
    width: 38px;
    height: 38px;
    font-size: 0.95rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .footer {
    padding: 40px 0 20px;
    margin-top: 48px;
  }

  .footer-grid {
    gap: 26px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }

  .back-to-top {
    bottom: 20px;
    right: 16px;
    width: 42px;
    height: 42px;
  }

  .banner-indicators button {
    width: 8px;
    height: 8px;
  }
}

@media (max-width: 380px) {
  .banner-content h2 {
    font-size: 1.12rem;
  }

  .banner-content p {
    font-size: 0.78rem;
  }

  .stat-number {
    font-size: 1.4rem;
  }
}

/* ---------- 减少动画偏好 ---------- */
@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;
  }

  .fade-up {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  .navbar,
  .mobile-nav,
  .back-to-top,
  .banner-indicators,
  .search-box,
  .theme-toggle,
  .mobile-menu-btn {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .banner-section {
    box-shadow: none;
  }

  .article-card,
  .faq-item,
  .howto-step,
  .contact-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}