:root {
  --primary: #FF4E50;
  --secondary: #2AB7CA;
  --tertiary: #FFB347;
  --quaternary: #6C5CE7;
  --bg-warm: #FFF9F2;
  --bg-flat: #FFF4EC;
  --bg-cool: #F0F7FA;
  --text-dark: #1A1A2E;
  --text-soft: rgba(26, 26, 46, 0.68);
  --card-bg: #FFFFFF;
  --border-soft: rgba(26, 26, 46, 0.07);
  --gradient-main: linear-gradient(135deg, #FF4E50 0%, #FFB347 55%, #2AB7CA 100%);
  --gradient-cta: linear-gradient(135deg, #FF4E50, #FFB347);
  --gradient-soft: linear-gradient(125deg, rgba(255, 78, 80, 0.06), rgba(255, 179, 71, 0.04), rgba(42, 183, 202, 0.06));
  --shadow-card: 0 8px 30px rgba(255, 78, 80, 0.08), 0 2px 8px rgba(26, 26, 46, 0.04);
  --shadow-hover: 0 16px 44px rgba(255, 78, 80, 0.14), 0 4px 12px rgba(26, 26, 46, 0.06);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

/* 基础重置 */
*, *::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-color: var(--bg-warm);
  background-image:
    radial-gradient(circle at 15% 30%, rgba(255, 78, 80, 0.025) 0%, transparent 32%),
    radial-gradient(circle at 85% 20%, rgba(42, 183, 202, 0.025) 0%, transparent 30%),
    radial-gradient(circle at 65% 85%, rgba(255, 179, 71, 0.02) 0%, transparent 28%);
  color: var(--text-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}

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

/* 核心布局 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 96px 0;
  position: relative;
}

.section:nth-child(even) {
  background:
    radial-gradient(circle at 10% 40%, rgba(255, 78, 80, 0.04), transparent 35%),
    radial-gradient(circle at 90% 60%, rgba(42, 183, 202, 0.04), transparent 40%),
    linear-gradient(105deg, var(--bg-flat) 0%, #FFEFE4 50%, var(--bg-warm) 100%);
}

/* 导航 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 249, 242, 0.86);
  backdrop-filter: blur(18px) saturate(1.8);
  -webkit-backdrop-filter: blur(18px) saturate(1.8);
  border-bottom: 1px solid var(--border-soft);
  transition: box-shadow 0.3s ease;
}

.site-header:hover {
  box-shadow: 0 4px 30px rgba(255, 78, 80, 0.05);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.3rem;
  text-decoration: none;
  color: var(--text-dark);
  letter-spacing: -0.02em;
  position: relative;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 6px 18px rgba(255, 78, 80, 0.3);
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  top: -12px;
  right: -12px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
}

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

.main-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dark);
  transition: color 0.25s ease;
  position: relative;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-main);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.main-nav a:hover {
  color: var(--primary);
}

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

.nav-cta {
  padding: 10px 24px;
  border-radius: 50px;
  color: #fff !important;
  font-weight: 700;
  background: var(--gradient-cta);
  box-shadow: 0 6px 18px rgba(255, 78, 80, 0.25);
  transition: transform 0.2s ease, box-shadow 0.3s ease;
}

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

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(255, 78, 80, 0.35);
  color: #fff;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: rgba(255, 78, 80, 0.06);
  border-radius: 12px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--text-dark);
  transition: background 0.2s ease;
}

.menu-toggle:hover {
  background: rgba(255, 78, 80, 0.12);
}

/* 首页 Hero */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 140px 0 80px;
  background:
    radial-gradient(circle at 80% 20%, rgba(255, 179, 71, 0.09), transparent 45%),
    radial-gradient(circle at 15% 75%, rgba(42, 183, 202, 0.07), transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(255, 78, 80, 0.04), transparent 60%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -8%;
  width: 52vw;
  height: 52vw;
  min-width: 420px;
  min-height: 420px;
  border-radius: 50%;
  background: conic-gradient(from 180deg, rgba(255, 78, 80, 0.05), rgba(255, 179, 71, 0.07), rgba(42, 183, 202, 0.06), rgba(108, 92, 231, 0.05), rgba(255, 78, 80, 0.05));
  filter: blur(30px);
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--primary) 0 12px, transparent 12px 20px, var(--secondary) 20px 32px, transparent 32px 40px, var(--tertiary) 40px 52px, transparent 52px 60px);
  opacity: 0.4;
}

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

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: rgba(255, 78, 80, 0.08);
  color: var(--primary);
  letter-spacing: 0.6px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 78, 80, 0.12);
}

.hero h1 {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--text-dark);
  position: relative;
}

.hero h1::after {
  content: '';
  display: block;
  width: 88px;
  height: 7px;
  background: var(--gradient-main);
  border-radius: 6px;
  margin-top: 22px;
}

.hero p {
  font-size: 1.12rem;
  opacity: 0.68;
  max-width: 540px;
  margin-bottom: 36px;
  color: var(--text-dark);
  font-weight: 400;
}

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--gradient-cta);
  color: #fff;
  box-shadow: 0 8px 24px rgba(255, 78, 80, 0.28);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(255, 78, 80, 0.38);
}

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

.btn-outline:hover {
  background: rgba(255, 78, 80, 0.06);
  transform: translateY(-3px);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 14px;
  color: var(--primary);
  text-transform: uppercase;
  background: rgba(255, 78, 80, 0.06);
  padding: 6px 16px;
  border-radius: 50px;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  line-height: 1.2;
  color: var(--text-dark);
}

.section-desc {
  max-width: 640px;
  opacity: 0.68;
  font-size: 1.02rem;
  margin-bottom: 48px;
  color: var(--text-dark);
}

/* 卡片网格 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 28px;
}

.category-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  border: 1px solid var(--border-soft);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 90px;
  height: 90px;
  border-radius: 0 0 0 40px;
  background: var(--gradient-soft);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

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

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.5rem;
  background: linear-gradient(135deg, #FFE8D6, #FFF4EC);
  color: var(--primary);
  transition: transform 0.3s ease;
}

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

.card-link {
  font-weight: 700;
  font-size: 0.88rem;
  text-decoration: none;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}

.card-link:hover {
  gap: 12px;
}

/* 特性块 */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #FFE8D6, #D4F1F4);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.feature-image::before {
  content: '';
  position: absolute;
  width: 60%;
  height: 60%;
  border-radius: 50%;
  background: conic-gradient(from 90deg, var(--primary), var(--tertiary), var(--secondary), var(--quaternary), var(--primary));
  opacity: 0.15;
  filter: blur(8px);
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
}

.feature-text {
  position: relative;
}

.feature-text .section-label {
  margin-left: 0;
}

.feature-list {
  list-style: none;
  margin-top: 24px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-dark);
}

.feature-list li::before {
  content: '✓';
  font-weight: 800;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(42, 183, 202, 0.15);
  color: var(--secondary);
  font-size: 0.85rem;
  flex-shrink: 0;
}

/* 数据条 */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  background: var(--card-bg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--gradient-main);
  border-radius: 4px;
  transition: width 0.4s ease;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.stat-item:hover::after {
  width: 60%;
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.92rem;
  opacity: 0.62;
  margin-top: 6px;
  font-weight: 500;
}

/* 内容墙 */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-soft);
  background: var(--card-bg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.content-wall-item img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  background: linear-gradient(135deg, #FFE8D6, #D4F1F4);
  display: block;
}

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

.content-wall-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-dark);
}

.content-wall-body p {
  font-size: 0.88rem;
  opacity: 0.62;
  color: var(--text-dark);
}

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

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(255, 78, 80, 0.3);
}

.faq-item.open {
  border-color: var(--primary);
  box-shadow: 0 4px 20px rgba(255, 78, 80, 0.08);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-dark);
  gap: 16px;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform 0.3s ease;
  line-height: 1;
}

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

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  opacity: 0.68;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-dark);
  border-top: 1px dashed var(--border-soft);
  padding-top: 14px;
}

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

/* CTA横幅 */
.cta-banner {
  padding: 68px 40px;
  text-align: center;
  border-radius: 28px;
  background: var(--gradient-cta);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: -30px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.cta-banner h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: #fff;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 30px;
  position: relative;
  z-index: 1;
  font-size: 1.05rem;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.18);
}

/* 页脚 */
.site-footer {
  padding-top: 60px;
  padding-bottom: 28px;
  background: var(--bg-warm);
  border-top: 1px solid var(--border-soft);
}

.site-footer .container {
  position: relative;
}

.site-footer::before {
  content: '';
  display: block;
  width: 100%;
  height: 4px;
  background: var(--gradient-main);
  opacity: 0.15;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding: 40px 0 32px;
}

.footer-brand .logo {
  font-size: 1.2rem;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 0.92rem;
  opacity: 0.6;
  max-width: 240px;
  line-height: 1.7;
  color: var(--text-dark);
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-dark);
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 3px;
  background: var(--gradient-main);
  border-radius: 3px;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-dark);
  opacity: 0.65;
  text-decoration: none;
  padding: 5px 0;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.footer-col a:hover {
  opacity: 1;
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-soft);
  margin-top: 16px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.5;
  color: var(--text-dark);
}

/* 工具类 */
.text-accent {
  color: var(--primary);
  font-weight: 700;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.68;
  text-align: center;
  font-size: 1rem;
  color: var(--text-dark);
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* 响应式 */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(255, 249, 242, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 18px;
    border-bottom: 1px solid var(--border-soft);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    z-index: 1000;
  }

  .main-nav.open a {
    font-size: 1.05rem;
  }

  .nav-cta {
    display: inline-block;
    padding: 12px 28px;
    text-align: center;
  }

  .hero h1 {
    font-size: 2.6rem;
  }

  .hero {
    min-height: 80vh;
    padding-top: 120px;
  }

  .section {
    padding: 72px 0;
  }

  .section-title {
    font-size: 1.9rem;
  }

  .section-desc {
    font-size: 0.95rem;
  }
}

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

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

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .btn {
    justify-content: center;
  }

  .feature-image {
    min-height: 240px;
  }

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

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

  .stat-number {
    font-size: 2rem;
  }

  .site-header .header-inner {
    padding: 0 18px;
  }
}