:root {
  --primary: #FF4B26;
  --primary-dark: #D93D22;
  --primary-light: #FF8A5B;
  --primary-soft: #FFE8E0;
  --primary-glow: rgba(255, 75, 38, 0.18);
  --bg: #FCF8F5;
  --bg-alt: #FFF1EA;
  --bg-card: #FFFFFF;
  --text: #2E2522;
  --text-muted: #8C7A73;
  --border: #F2E8E2;
  --border-hover: #FFB49A;
  --gradient-primary: linear-gradient(135deg, #FF4B26 0%, #FF8A5B 100%);
  --gradient-soft: linear-gradient(160deg, #FFF5F0 0%, #FFE8E0 55%, #FFD9CE 100%);
}

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* 核心布局 — 必须居中 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 90px 0;
  position: relative;
}

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

/* 导航 — 固定顶部 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 250, 247, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s ease;
}

.site-header:hover {
  box-shadow: 0 4px 20px rgba(255, 75, 38, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.35rem;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 14px var(--primary-glow);
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 80%;
  height: 80%;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  filter: blur(6px);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.25s ease;
  color: var(--text);
  position: relative;
  padding: 4px 0;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-primary);
  transition: width 0.28s ease;
}

.main-nav a:not(.nav-cta):hover {
  color: var(--primary);
}

.main-nav a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px;
  border-radius: 40px;
  color: #fff !important;
  font-weight: 600;
  background: var(--gradient-primary);
  box-shadow: 0 4px 16px var(--primary-glow);
  transition: transform 0.25s ease, box-shadow 0.25s ease !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--primary-glow) !important;
}

.nav-cta::after {
  display: none;
}

.menu-toggle {
  display: none;
}

/* 首页Hero */
.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--gradient-soft);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 75, 38, 0.12) 0%, rgba(255, 138, 91, 0.06) 40%, transparent 70%);
  top: 10%;
  right: -120px;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 75, 38, 0.08) 0%, transparent 70%);
  bottom: -80px;
  left: -80px;
  pointer-events: none;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 20px;
  border-radius: 40px;
  margin-bottom: 20px;
  background: var(--gradient-primary);
  color: #fff;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  line-height: 1.1;
  margin-bottom: 22px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text);
  background: linear-gradient(120deg, #2E2522 30%, var(--primary) 70%, var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.08rem;
  opacity: 0.72;
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.75;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: 20px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 24px 60px rgba(255, 75, 38, 0.1);
  border: 4px solid rgba(255, 255, 255, 0.8);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.28s cubic-bezier(0.22, 1, 0.36, 1);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px var(--primary-glow);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary-soft);
  transform: translateY(-3px);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--primary);
  padding: 6px 18px;
  background: var(--primary-soft);
  border-radius: 40px;
}

.section-title {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text);
}

.section-desc {
  max-width: 600px;
  opacity: 0.68;
  margin-bottom: 48px;
  font-size: 1rem;
  line-height: 1.7;
}

/* 卡片网格 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.category-card {
  border-radius: 20px;
  padding: 32px 28px;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(255, 75, 38, 0.08);
  border-color: var(--border-hover);
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 6px 18px var(--primary-glow);
}

.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
  margin-top: 12px;
}

.card-link:hover {
  gap: 8px;
}

/* 特性块 */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 68px;
  align-items: center;
}

.feature-image {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(255, 75, 38, 0.08);
  border: 3px solid rgba(255, 255, 255, 0.7);
  transition: transform 0.4s ease;
}

.feature-image:hover {
  transform: scale(1.02);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.feature-text {
  padding: 10px 0;
}

.feature-text .section-title {
  margin-bottom: 12px;
}

.feature-text p {
  opacity: 0.68;
  margin-bottom: 20px;
  line-height: 1.7;
}

.feature-list {
  list-style: none;
  margin-top: 18px;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}

.feature-list li::before {
  content: '✓';
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-soft);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* 数据条 */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 30px 20px;
  border-radius: 20px;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  transition: all 0.3s ease;
}

.stat-item:hover {
  border-color: var(--border-hover);
  box-shadow: 0 12px 30px rgba(255, 75, 38, 0.06);
  transform: translateY(-4px);
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-top: 8px;
  font-weight: 500;
}

/* 内容墙 */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: 18px;
  overflow: hidden;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 36px rgba(255, 75, 38, 0.08);
  border-color: var(--border-hover);
}

.content-wall-item img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  display: block;
}

.content-wall-body {
  padding: 22px 24px 26px;
}

.content-wall-body h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  font-weight: 700;
}

.content-wall-body p {
  font-size: 0.88rem;
  opacity: 0.65;
  line-height: 1.6;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1.5px solid var(--border);
  border-radius: 14px;
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--bg-card);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

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

.faq-item.open {
  border-color: var(--primary);
  box-shadow: 0 8px 24px rgba(255, 75, 38, 0.06);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  color: var(--text);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 300;
  transition: transform 0.3s ease;
}

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

.faq-item .faq-answer {
  padding: 0 24px 18px;
  display: none;
  opacity: 0.68;
  line-height: 1.7;
  font-size: 0.95rem;
}

.faq-item.open .faq-answer {
  display: block;
}

/* CTA横幅 */
.cta-banner {
  padding: 64px 40px;
  text-align: center;
  border-radius: 28px;
  background: var(--gradient-primary);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  top: -60px;
  left: -60px;
}

.cta-banner::after {
  content: '';
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  bottom: -40px;
  right: -30px;
}

.cta-banner h2 {
  color: #fff;
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.1);
}

/* 页脚 */
.site-footer {
  padding: 64px 0 32px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.site-footer .container {
  max-width: 1200px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  color: var(--text);
}

.footer-brand .logo {
  margin-bottom: 18px;
  font-size: 1.4rem;
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.65;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  padding: 5px 0;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-col a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(46, 37, 34, 0.08);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 工具类 */
.text-accent {
  color: var(--primary);
}

.text-center {
  text-align: center;
}

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.68;
  text-align: center;
  line-height: 1.7;
}

.mt-0 {
  margin-top: 0 !important;
}

.mb-0 {
  margin-bottom: 0 !important;
}

/* 额外装饰辅助 */
.section-title::after {
  content: '';
  display: block;
  width: 42px;
  height: 4px;
  border-radius: 4px;
  background: var(--gradient-primary);
  margin-top: 14px;
}

.text-center .section-title::after {
  margin-left: auto;
  margin-right: auto;
}

/* 响应式 */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

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

  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(255, 250, 247, 0.98);
    padding: 24px 32px;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 20px 40px rgba(255, 75, 38, 0.08);
    border-radius: 0 0 20px 20px;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a.nav-cta {
    margin-top: 8px;
  }

  .menu-toggle {
    display: flex;
    width: 42px;
    height: 42px;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.8);
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.4rem;
    color: var(--text);
    position: relative;
    z-index: 1002;
    transition: all 0.25s ease;
  }

  .menu-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
  }

  .menu-toggle::before {
    content: '☰';
    font-weight: 300;
  }

  .site-header:hover {
    box-shadow: none;
  }

  .hero {
    min-height: 80vh;
    padding-top: 72px;
  }

  .hero-image {
    margin-top: 24px;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .cta-banner {
    padding: 48px 24px;
    border-radius: 20px;
  }

  .section {
    padding: 60px 0;
  }

  .stats-bar {
    gap: 12px;
  }
}

/* 流动渐变装饰块（用于section之间的分隔） */
.divider-wave {
  height: 60px;
  background: linear-gradient(to right, transparent, var(--primary-soft), transparent);
  clip-path: polygon(0 50%, 25% 0, 100% 50%, 0 100%);
}

/* 视频封面播放按钮 */
.play-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 8px 24px var(--primary-glow);
}

.play-btn::after {
  content: '▶';
  color: #fff;
  font-size: 1.1rem;
  margin-left: 3px;
}

/* 选中文本强调 */
::selection {
  background: var(--primary);
  color: #fff;
}

/* 链接默认平滑 */
a {
  -webkit-tap-highlight-color: transparent;
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 8px;
}

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