:root {
  --brand-primary: #1a1a2e;
  --brand-secondary: #16213e;
  --brand-accent: #e94560;
  --brand-accent-2: #7c3aed;
  --brand-light: #f5f5f7;
  --brand-text: #2d2d2d;
  --brand-muted: #6b7280;
  --brand-bg: #ffffff;
  --brand-card: rgba(255, 255, 255, 0.72);
  --brand-border: #e5e7eb;
  --brand-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  --brand-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
  --brand-radius: 16px;
  --brand-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-blur: blur(16px);
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.35);
}

body.dark-mode {
  --brand-primary: #0f0f1a;
  --brand-secondary: #1a1a2e;
  --brand-accent: #ff6b81;
  --brand-accent-2: #a78bfa;
  --brand-light: #1e1e2e;
  --brand-text: #e5e5e5;
  --brand-muted: #9ca3af;
  --brand-bg: #0d0d15;
  --brand-card: rgba(22, 22, 42, 0.72);
  --brand-border: #2a2a3e;
  --brand-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  --brand-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
  --glass-bg: rgba(22, 22, 42, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
}

* {
  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", Arial, sans-serif;
  background-color: var(--brand-bg);
  color: var(--brand-text);
  line-height: 1.8;
  font-size: 16px;
  transition: background-color 0.3s, color 0.3s;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a:hover {
  opacity: 0.8;
}

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

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

/* ========== 导航吸顶 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--brand-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  background-color: var(--glass-bg);
  transition: var(--brand-transition);
}

body.dark-mode .site-header {
  background-color: var(--glass-bg);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--brand-primary);
  letter-spacing: -0.5px;
}

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

.logo svg {
  width: 36px;
  height: 36px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--brand-text);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-accent), var(--brand-accent-2));
  transition: var(--brand-transition);
  border-radius: 2px;
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: 40px;
  padding: 6px 14px;
  border: 1px solid var(--glass-border);
  transition: var(--brand-transition);
}

.search-box:focus-within {
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  color: var(--brand-text);
  font-size: 0.9rem;
  width: 160px;
  padding: 4px 0;
}

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

.search-box svg {
  width: 18px;
  height: 18px;
  fill: var(--brand-muted);
  flex-shrink: 0;
}

.theme-toggle {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--brand-transition);
  color: var(--brand-text);
}

.theme-toggle:hover {
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-accent-2));
  color: #fff;
  transform: rotate(20deg) scale(1.05);
  border-color: transparent;
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
  transition: var(--brand-transition);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: var(--brand-transition);
}

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

.mobile-menu-btn svg {
  width: 26px;
  height: 26px;
  fill: var(--brand-text);
}

/* ========== 移动端菜单 ========== */
.mobile-nav {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--brand-border);
  padding: 20px 24px;
  z-index: 999;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--brand-shadow-lg);
  animation: slideDown 0.3s ease;
}

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

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

.mobile-nav a {
  color: var(--brand-text);
  font-weight: 500;
  padding: 8px 0;
  border-bottom: 1px solid var(--brand-border);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

/* ========== 面包屑 ========== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--brand-muted);
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb li + li::before {
  content: '›';
  margin-right: 6px;
  color: var(--brand-muted);
}

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

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

/* ========== Banner轮播 - 渐变+毛玻璃 ========== */
.hero-banner {
  position: relative;
  overflow: hidden;
  border-radius: var(--brand-radius);
  margin: 16px 0 40px;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #2d1b4e 70%, #4a1d5c 100%);
  min-height: 380px;
  display: flex;
  align-items: center;
  box-shadow: var(--brand-shadow-lg);
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: float 8s ease-in-out infinite;
}

.hero-banner::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.05); }
}

.hero-slide {
  display: none;
  width: 100%;
  padding: 60px 48px;
  position: relative;
  z-index: 2;
  animation: fadeIn 0.6s ease;
}

.hero-slide.active {
  display: block;
}

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

.hero-slide h1 {
  font-size: 2.6rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-slide p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin-bottom: 28px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--brand-accent), #ff6b81);
  color: #fff;
  padding: 14px 32px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--brand-transition);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(233, 69, 96, 0.35);
  position: relative;
  overflow: hidden;
}

.hero-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.hero-cta:hover::before {
  transform: translateX(100%);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(233, 69, 96, 0.5);
  color: #fff;
  opacity: 1;
}

.hero-dots {
  position: absolute;
  bottom: 24px;
  left: 48px;
  display: flex;
  gap: 10px;
  z-index: 3;
}

.hero-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  cursor: pointer;
  transition: var(--brand-transition);
  border: none;
  backdrop-filter: blur(4px);
}

.hero-dot.active {
  background: var(--brand-accent);
  width: 28px;
  border-radius: 6px;
  box-shadow: 0 0 12px rgba(233, 69, 96, 0.6);
}

/* ========== 数字统计 ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 40px 0;
}

.stat-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--brand-radius);
  padding: 28px 20px;
  text-align: center;
  transition: var(--brand-transition);
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-accent), var(--brand-accent-2));
  transform: scaleX(0);
  transition: transform 0.4s ease;
  transform-origin: left;
}

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

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--brand-shadow-lg);
  border-color: var(--brand-accent);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

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

/* ========== 通用区块 ========== */
.section {
  padding: 48px 0;
}

.section-header {
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: 8px;
  letter-spacing: -0.3px;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-accent), var(--brand-accent-2));
  border-radius: 2px;
}

body.dark-mode .section-header h2 {
  color: #ffffff;
}

.section-header p {
  color: var(--brand-muted);
  font-size: 1rem;
  max-width: 720px;
  margin-top: 12px;
}

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

.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--brand-radius);
  padding: 28px 24px;
  transition: var(--brand-transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.04), rgba(124, 58, 237, 0.04));
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

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

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--brand-shadow-lg);
  border-color: var(--brand-accent);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.12), rgba(124, 58, 237, 0.12));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: var(--brand-transition);
}

.card:hover .card-icon {
  transform: scale(1.08) rotate(-4deg);
}

.card-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--brand-accent);
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: 8px;
}

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

.card p {
  font-size: 0.92rem;
  color: var(--brand-muted);
  line-height: 1.7;
  flex: 1;
}

/* ========== 文章列表 ========== */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--brand-radius);
  padding: 28px 24px;
  transition: var(--brand-transition);
  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, var(--brand-accent), var(--brand-accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

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

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--brand-shadow-lg);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--brand-muted);
  margin-bottom: 12px;
}

.article-tag {
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.1), rgba(124, 58, 237, 0.1));
  color: var(--brand-accent);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.article-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--brand-primary);
  margin-bottom: 10px;
  line-height: 1.5;
}

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

.article-card p {
  font-size: 0.9rem;
  color: var(--brand-muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}

.read-more {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--brand-transition);
}

.read-more:hover {
  gap: 10px;
  opacity: 1;
}

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

.faq-item {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--brand-transition);
}

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

.faq-item.active {
  border-color: var(--brand-accent);
  box-shadow: var(--brand-shadow);
}

.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1rem;
  color: var(--brand-primary);
  user-select: none;
  transition: var(--brand-transition);
}

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

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

.faq-question svg {
  width: 20px;
  height: 20px;
  fill: var(--brand-muted);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
  fill: var(--brand-accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--brand-muted);
  font-size: 0.93rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 600px;
  padding: 0 24px 20px;
}

/* ========== HowTo ========== */
.howto-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  counter-reset: step;
}

.howto-step {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--brand-border);
  position: relative;
  transition: var(--brand-transition);
}

.howto-step:hover {
  padding-left: 8px;
}

.howto-step:last-child {
  border-bottom: none;
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-accent-2));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(233, 69, 96, 0.3);
  transition: var(--brand-transition);
}

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

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

body.dark-mode .step-content h4 {
  color: #ffffff;
}

.step-content p {
  font-size: 0.92rem;
  color: var(--brand-muted);
  line-height: 1.75;
}

/* ========== 公司信息表格 ========== */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.info-item {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 20px;
  transition: var(--brand-transition);
}

.info-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--brand-shadow);
  border-color: var(--brand-accent);
}

.info-item dt {
  font-size: 0.8rem;
  color: var(--brand-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  font-weight: 600;
}

.info-item dd {
  font-size: 0.95rem;
  color: var(--brand-text);
  font-weight: 500;
  margin: 0;
}

/* ========== 评价 ========== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.review-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--brand-radius);
  padding: 24px;
  transition: var(--brand-transition);
  position: relative;
  overflow: hidden;
}

.review-card::before {
  content: '"';
  position: absolute;
  top: 8px;
  right: 20px;
  font-size: 5rem;
  line-height: 1;
  color: var(--brand-accent);
  opacity: 0.08;
  font-family: Georgia, serif;
  pointer-events: none;
}

.review-card:hover {
  box-shadow: var(--brand-shadow-lg);
  transform: translateY(-3px);
}

.review-stars {
  color: #f59e0b;
  font-size: 0.9rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.92rem;
  color: var(--brand-text);
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.review-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-primary);
}

body.dark-mode .review-name {
  color: #ffffff;
}

.review-role {
  font-size: 0.78rem;
  color: var(--brand-muted);
}

/* ========== 页脚 ========== */
.site-footer {
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
  color: rgba(255, 255, 255, 0.75);
  padding: 48px 0 24px;
  margin-top: 48px;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
}

.footer-brand h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}

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

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

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.88rem;
  transition: var(--brand-transition);
}

.footer-col a:hover {
  color: var(--brand-accent);
  opacity: 1;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  position: relative;
  z-index: 1;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

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

/* ========== 返回顶部 ========== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-accent-2));
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(233, 69, 96, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: var(--brand-transition);
  z-index: 900;
}

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

.back-to-top:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 8px 28px rgba(233, 69, 96, 0.55);
}

.back-to-top svg {
  width: 22px;
  height: 22px;
  fill: #fff;
}

/* ========== 滚动动画 ========== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 锚点偏移 ========== */
:target {
  scroll-margin-top: 80px;
}

/* ========== 响应式 ========== */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

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

  .search-box {
    display: none;
  }

  .hero-slide h1 {
    font-size: 1.8rem;
  }

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

  .hero-dots {
    left: 24px;
  }

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

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

  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }

  .article-list {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 16px;
  }

  .hero-banner {
    min-height: 320px;
    border-radius: 12px;
  }

  .hero-slide h1 {
    font-size: 1.5rem;
  }

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

  .hero-cta {
    padding: 12px 24px;
    font-size: 0.92rem;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

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

  .stat-card {
    padding: 20px 12px;
  }

  .article-list {
    grid-template-columns: 1fr;
  }

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

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

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

  .section-header h2 {
    font-size: 1.4rem;
  }

  .howto-step {
    gap: 12px;
  }

  .step-number {
    width: 36px;
    height: 36px;
    font-size: 0.9rem;
  }

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

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

/* ========== 打印隐藏 ========== */
@media print {
  .site-header,
  .back-to-top,
  .hero-dots {
    display: none;
  }

  .hero-banner {
    background: #f5f5f7 !important;
    box-shadow: none;
  }

  .hero-slide h1,
  .hero-slide p {
    color: #000 !important;
  }

  .card,
  .article-card,
  .review-card,
  .faq-item,
  .info-item {
    box-shadow: none !important;
    border: 1px solid #ddd !important;
    background: #fff !important;
  }
}

/* ========== 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;
  }
}

/* ========== 高对比度模式 ========== */
@media (prefers-contrast: high) {
  :root {
    --brand-border: #000000;
    --brand-muted: #333333;
  }

  body.dark-mode {
    --brand-border: #ffffff;
    --brand-muted: #cccccc;
  }
}

/* ========== 选中文本样式 ========== */
::selection {
  background: var(--brand-accent);
  color: #ffffff;
}

::-moz-selection {
  background: var(--brand-accent);
  color: #ffffff;
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--brand-light);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-accent-2));
  border-radius: 5px;
  border: 2px solid var(--brand-light);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--brand-accent);
}

/* ========== 焦点可见性 ========== */
:focus-visible {
  outline: 2px solid var(--brand-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--brand-accent);
  outline-offset: 2px;
}