:root {
  --primary: #1a1a2e;
  --secondary: #16213e;
  --accent: #e94560;
  --accent-light: #ff6b81;
  --accent-glow: rgba(233, 69, 96, 0.35);
  --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 45%, #2d1b3d 100%);
  --gradient-accent: linear-gradient(135deg, #e94560 0%, #ff6b81 100%);
  --gradient-soft: linear-gradient(135deg, rgba(233, 69, 96, 0.08) 0%, rgba(255, 107, 129, 0.08) 100%);
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8a8aa3;
  --text-light: #ffffff;
  --bg-light: #f5f6fa;
  --bg-white: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-dark: rgba(26, 26, 46, 0.72);
  --border-color: #e6e8f0;
  --border-glass: rgba(255, 255, 255, 0.35);
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow: 0 4px 20px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 26, 46, 0.14);
  --shadow-accent: 0 8px 28px rgba(233, 69, 96, 0.28);
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-fast: all 0.18s ease;
  --transition-slow: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
  --blur: saturate(180%) blur(18px);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-light);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(233, 69, 96, 0.06), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(255, 107, 129, 0.05), transparent);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

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

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

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

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent), var(--accent-light));
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg-light);
}

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

/* ============ 导航栏（毛玻璃吸顶） ============ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(26, 26, 46, 0.82);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
  transition: var(--transition);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-light);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: var(--transition);
}

.logo:hover {
  color: #fff;
  transform: translateY(-1px);
}

.logo svg {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  box-shadow: 0 4px 12px var(--accent-glow);
  transition: var(--transition);
}

.logo:hover svg {
  transform: rotate(-6deg) scale(1.05);
}

.nav-links {
  display: flex;
  gap: 26px;
  list-style: none;
  margin: 0 auto;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  transition: var(--transition-fast);
}

.nav-links a:hover {
  color: #fff;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transition: width 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

.search-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.1);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-pill);
  padding: 6px 8px 6px 16px;
  transition: var(--transition);
}

.search-box:focus-within {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(233, 69, 96, 0.5);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-size: 14px;
  width: 150px;
  font-family: inherit;
}

.search-box input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.search-box button {
  background: var(--gradient-accent);
  border: none;
  cursor: pointer;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  transition: var(--transition);
}

.search-box button:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 14px var(--accent-glow);
}

.dark-toggle {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: var(--transition);
}

.dark-toggle:hover {
  background: var(--gradient-accent);
  border-color: transparent;
  transform: rotate(20deg) scale(1.05);
  box-shadow: 0 4px 14px var(--accent-glow);
}

.mobile-menu-btn {
  display: none;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  color: #fff;
  cursor: pointer;
  padding: 7px;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.mobile-menu-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ============ 移动菜单 ============ */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(22, 33, 62, 0.96);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  padding: 16px 20px 24px;
  z-index: 999;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  animation: slideDown 0.3s ease;
}

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

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

.mobile-menu ul {
  list-style: none;
}

.mobile-menu li {
  margin-bottom: 2px;
}

.mobile-menu a {
  display: block;
  padding: 13px 12px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.mobile-menu a:hover {
  background: rgba(233, 69, 96, 0.18);
  color: #fff;
  padding-left: 18px;
}

/* ============ 面包屑 ============ */
.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px 0;
  font-size: 14px;
  color: var(--text-muted);
}

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

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: '/';
  margin-right: 8px;
  color: var(--text-muted);
  opacity: 0.6;
}

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

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

/* ============ Hero 渐变轮播 ============ */
.hero {
  max-width: 1200px;
  margin: 20px auto 0;
  padding: 0 20px;
}

.slider {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--gradient-hero);
  min-height: 340px;
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.slider::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(233, 69, 96, 0.22), transparent 45%),
    radial-gradient(circle at 10% 90%, rgba(255, 107, 129, 0.14), transparent 40%);
  pointer-events: none;
  z-index: 1;
}

.slides {
  display: flex;
  transition: transform 0.65s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
  z-index: 2;
}

.slide {
  min-width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 46px 54px;
  gap: 34px;
  color: var(--text-light);
}

.slide-content {
  flex: 1;
  min-width: 0;
}

.slide-content h1 {
  font-size: 34px;
  margin-bottom: 16px;
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
}

.slide-content h1 span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent);
}

.slide-content p {
  font-size: 15.5px;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 26px;
  max-width: 540px;
  line-height: 1.8;
}

.slide-btn {
  display: inline-block;
  background: var(--gradient-accent);
  color: #fff;
  padding: 13px 34px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 15px;
  box-shadow: 0 6px 22px var(--accent-glow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.slide-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transition: left 0.6s ease;
}

.slide-btn:hover {
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(233, 69, 96, 0.5);
}

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

.slide-visual {
  flex: 0 0 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: floatY 5s ease-in-out infinite;
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.slide-visual svg {
  width: 100%;
  max-width: 320px;
  height: auto;
  filter: drop-shadow(0 12px 32px rgba(233, 69, 96, 0.25));
}

.slider-dots {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 3;
}

.slider-dots button {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  border: none;
  background: rgba(255, 255, 255, 0.35);
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.slider-dots button:hover {
  background: rgba(255, 255, 255, 0.65);
}

.slider-dots button.active {
  background: var(--gradient-accent);
  width: 26px;
  box-shadow: 0 0 14px var(--accent-glow);
}

/* ============ 数字统计 ============ */
.stats {
  max-width: 1200px;
  margin: 30px auto 0;
  padding: 0 20px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.stats-grid:hover {
  box-shadow: var(--shadow-lg);
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-item + .stat-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 60%;
  background: linear-gradient(180deg, transparent, var(--border-color), transparent);
}

.stat-number {
  font-size: 38px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent);
  line-height: 1.2;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ============ 通用容器与区块 ============ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 56px 0;
  position: relative;
}

.section-title {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text-primary);
  letter-spacing: -0.4px;
  line-height: 1.35;
}

.section-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.section-header {
  text-align: center;
  margin-bottom: 10px;
}

.section-header .section-title::after {
  content: '';
  display: block;
  width: 54px;
  height: 3px;
  background: var(--gradient-accent);
  margin: 14px auto 0;
  border-radius: 2px;
  box-shadow: 0 2px 10px var(--accent-glow);
}

/* ============ 卡片网格 ============ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--bg-glass);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.25);
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: #fff;
  box-shadow: 0 6px 18px var(--accent-glow);
  transition: var(--transition);
}

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

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

.card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ============ 内容区块 ============ */
.content-block {
  background: var(--bg-glass);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 38px 34px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
  transition: var(--transition);
}

.content-block:hover {
  box-shadow: var(--shadow-lg);
}

.content-block h2 {
  font-size: 24px;
  margin-bottom: 18px;
  color: var(--text-primary);
  padding-left: 16px;
  border-left: 4px solid var(--accent);
  line-height: 1.4;
  font-weight: 800;
}

.content-block h3 {
  font-size: 18px;
  margin: 24px 0 10px;
  color: var(--text-primary);
  font-weight: 700;
}

.content-block h4 {
  font-size: 16px;
  margin: 18px 0 8px;
  color: var(--text-secondary);
  font-weight: 600;
}

.content-block p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.85;
}

.content-block ul,
.content-block ol {
  padding-left: 22px;
  margin-bottom: 16px;
}

.content-block li {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  line-height: 1.75;
}

.content-block li::marker {
  color: var(--accent);
}

/* ============ 文章列表 ============ */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-glass);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.22);
}

.article-cover {
  height: 160px;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.article-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(233, 69, 96, 0.18), transparent 65%);
  opacity: 0;
  transition: var(--transition);
}

.article-card:hover .article-cover::after {
  opacity: 1;
}

.article-cover svg {
  width: 64px;
  height: 64px;
  opacity: 0.7;
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.article-card:hover .article-cover svg {
  transform: scale(1.12);
  opacity: 1;
}

.article-body {
  padding: 22px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.article-meta span:first-child::before {
  content: '📅 ';
  opacity: 0.7;
}

.article-body h3 {
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.5;
  transition: var(--transition-fast);
}

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

.article-body p {
  font-size: 14px;
  color: var(--text-secondary);
  flex: 1;
  margin-bottom: 16px;
  line-height: 1.75;
}

.read-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
  align-self: flex-start;
}

.read-more:hover {
  gap: 10px;
  color: var(--accent-light);
}

/* ============ FAQ ============ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-item:hover {
  border-color: rgba(233, 69, 96, 0.25);
  box-shadow: var(--shadow);
}

.faq-item.open {
  border-color: rgba(233, 69, 96, 0.35);
  box-shadow: var(--shadow);
}

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  padding: 19px 24px;
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--text-primary);
  transition: var(--transition-fast);
  font-family: inherit;
}

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

.faq-question .icon {
  transition: transform 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
  font-size: 22px;
  color: var(--accent);
  flex-shrink: 0;
  line-height: 1;
  font-weight: 400;
}

.faq-item.open .faq-question .icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.faq-item.open .faq-answer {
  max-height: 600px;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.85;
}

/* ============ HowTo 步骤 ============ */
.howto-steps {
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.howto-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--bg-glass);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  padding: 24px 26px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}

.howto-step:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
  border-color: rgba(233, 69, 96, 0.25);
}

.howto-step::before {
  counter-increment: step;
  content: counter(step);
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  background: var(--gradient-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 17px;
  box-shadow: 0 6px 16px var(--accent-glow);
  transition: var(--transition);
}

.howto-step:hover::before {
  transform: scale(1.1) rotate(-8deg);
}

.howto-step h4 {
  font-size: 16px;
  margin-bottom: 6px;
  color: var(--text-primary);
  font-weight: 700;
}

.howto-step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ============ 客户评价 ============ */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial {
  background: var(--bg-glass);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: var(--transition);
}

.testimonial:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 69, 96, 0.22);
}

.testimonial::before {
  content: '"';
  position: absolute;
  top: 6px;
  right: 22px;
  font-size: 64px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.18;
  font-family: Georgia, serif;
  line-height: 1;
  pointer-events: none;
}

.testimonial p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 18px;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px var(--accent-glow);
  transition: var(--transition);
}

.testimonial:hover .avatar {
  transform: scale(1.08);
}

.author-info strong {
  display: block;
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 600;
}

.author-info span {
  font-size: 12px;
  color: var(--text-muted);
}

/* ============ 联系信息 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--bg-glass);
  -webkit-backdrop-filter: var(--blur);
  backdrop-filter: var(--blur);
  border: 1px solid var(--border-glass);
  padding: 24px 26px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.contact-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(233, 69, 96, 0.22);
}

.contact-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 14px var(--accent-glow);
  transition: var(--transition);
}

.contact-item:hover .contact-icon {
  transform: rotate(-6deg) scale(1.06);
}

.contact-item h4 {
  font-size: 15px;
  margin-bottom: 4px;
  color: var(--text-primary);
  font-weight: 700;
}

.contact-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============ 页脚 ============ */
footer {
  background: var(--gradient-hero);
  color: rgba(255, 255, 255, 0.72);
  margin-top: 56px;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(233, 69, 96, 0.5), transparent);
}

.footer-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 54px 20px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  position: relative;
  z-index: 1;
}

.footer-brand h3 {
  color: #fff;
  font-size: 20px;
  margin-bottom: 14px;
  font-weight: 700;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.58);
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
  font-weight: 600;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

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

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

.footer-col a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.58);
  transition: var(--transition-fast);
  display: inline-block;
}

.footer-col a:hover {
  color: var(--accent-light);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 20px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.42);
  position: relative;
  z-index: 1;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.62);
}

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

/* ============ 返回顶部 ============ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 22px var(--accent-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: var(--transition);
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 10px 30px rgba(233, 69, 96, 0.5);
}

/* ============ 滚动动画 ============ */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.25, 0.8, 0.25, 1),
    transform 0.7s cubic-bezier(0.25, 0.8, 0.25, 1);
  will-change: opacity, transform;
}

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

/* ============ 暗黑模式 ============ */
body.dark {
  --text-primary: #eaeaf4;
  --text-secondary: #a8a8c2;
  --text-muted: #7a7a96;
  --bg-light: #0d0d17;
  --bg-white: #1a1a2e;
  --bg-glass: rgba(26, 26, 46, 0.68);
  --bg-glass-dark: rgba(13, 13, 23, 0.72);
  --border-color: #2a2a40;
  --border-glass: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
}

body.dark {
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(233, 69, 96, 0.1), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(255, 107, 129, 0.06), transparent);
}

body.dark .card:hover,
body.dark .article-card:hover,
body.dark .testimonial:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.7);
}

body.dark .faq-question:hover {
  background: rgba(233, 69, 96, 0.08);
}

body.dark .search-box {
  background: rgba(255, 255, 255, 0.06);
}

body.dark .navbar {
  background: rgba(13, 13, 23, 0.85);
}

body.dark .mobile-menu {
  background: rgba(13, 13, 23, 0.97);
}

body.dark ::-webkit-scrollbar-track {
  background: var(--bg-light);
}

body.dark ::-webkit-scrollbar-thumb {
  border-color: var(--bg-light);
}

body.dark .stat-item + .stat-item::before {
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

/* ============ 响应式布局 ============ */
@media (max-width: 992px) {
  .nav-links {
    gap: 18px;
  }

  .nav-links a {
    font-size: 14px;
  }

  .search-box input {
    width: 110px;
  }

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

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

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

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

  .stat-item:nth-child(3)::before,
  .stat-item:nth-child(1)::before {
    display: none;
  }

  .slide-content h1 {
    font-size: 28px;
  }

  .slide-visual {
    flex: 0 0 260px;
  }
}

@media (max-width: 768px) {
  html {
    scroll-padding-top: 72px;
  }

  .nav-links {
    display: none;
  }

  .search-box {
    display: none;
  }

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

  .nav-container {
    height: 60px;
  }

  .mobile-menu {
    top: 60px;
  }

  .logo {
    font-size: 18px;
  }

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

  .hero {
    margin-top: 16px;
  }

  .slider {
    min-height: auto;
  }

  .slide {
    flex-direction: column;
    padding: 32px 24px 48px;
    text-align: center;
    gap: 24px;
  }

  .slide-content h1 {
    font-size: 24px;
    margin-bottom: 12px;
  }

  .slide-content p {
    font-size: 14px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 20px;
  }

  .slide-btn {
    padding: 11px 28px;
    font-size: 14px;
  }

  .slide-visual {
    flex: 0 0 auto;
    max-width: 200px;
    width: 100%;
  }

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

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

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

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

  .footer-main {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 20px 24px;
  }

  .section {
    padding: 40px 0;
  }

  .section-title {
    font-size: 22px;
  }

  .section-subtitle {
    font-size: 14px;
    margin-bottom: 24px;
  }

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

  .content-block h2 {
    font-size: 20px;
    padding-left: 12px;
  }

  .content-block h3 {
    font-size: 17px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 24px 14px;
    gap: 20px;
  }

  .stat-item + .stat-item::before {
    display: none;
  }

  .stat-number {
    font-size: 30px;
  }

  .stat-label {
    font-size: 13px;
  }

  .howto-step {
    padding: 20px 18px;
    gap: 14px;
  }

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

  .howto-step::before {
    width: 36px;
    height: 36px;
    font-size: 15px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 15px;
  }

  .faq-answer p {
    padding: 0 18px 18px;
    font-size: 14px;
  }

  .contact-item {
    padding: 20px 20px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }

  .breadcrumb {
    padding: 14px 20px 0;
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .slide-content h1 {
    font-size: 21px;
  }

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

  .stat-item + .stat-item::before {
    display: none;
  }

  .stat-number {
    font-size: 34px;
  }

  .content-block {
    padding: 22px 18px;
  }

  .article-body {
    padding: 18px 20px;
  }

  .testimonial {
    padding: 24px 22px;
  }
}

/* ============ 动效降级 ============ */
@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;
  }

  .slide-visual {
    animation: none;
  }

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

/* ============ 打印样式 ============ */
@media print {
  .navbar,
  .mobile-menu,
  .back-to-top,
  .slider-dots,
  .search-box,
  .dark-toggle,
  .mobile-menu-btn {
    display: none !important;
  }

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

  .slider,
  .card,
  .content-block,
  .article-card,
  .testimonial,
  .faq-item,
  .howto-step,
  .contact-item {
    box-shadow: none;
    border: 1px solid #ddd;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: #fff;
  }

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