:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a28;
  --text-primary: #f0f0f5;
  --text-secondary: #8888aa;
  --text-muted: #555570;
  --accent-1: #ff6b9d;
  --accent-2: #c44dff;
  --accent-3: #00d4aa;
  --accent-gradient: linear-gradient(135deg, #ff6b9d, #c44dff, #00d4aa);
  --border-color: #2a2a3a;
  --shadow-glow: 0 0 40px rgba(196, 77, 255, 0.15);
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== 容器 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ===== 头部 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.site-header:hover {
  background: rgba(10, 10, 15, 0.95);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-decoration: none;
  position: relative;
  transition: transform 0.3s ease;
}

.logo::after {
  content: '™';
  font-size: 0.5rem;
  vertical-align: super;
  background: var(--accent-2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo:hover {
  transform: scale(1.02);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s ease;
}

.main-nav a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border-radius: 2px;
}

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

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

.nav-cta {
  background: var(--accent-gradient);
  color: #fff !important;
  padding: 10px 24px !important;
  border-radius: 50px;
  font-weight: 600 !important;
  transition: transform 0.3s ease, box-shadow 0.3s ease !important;
}

.nav-cta::before {
  display: none !important;
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.menu-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ===== 英雄区 ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(196, 77, 255, 0.08), transparent 70%);
  pointer-events: none;
  animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-30px, 30px) scale(1.1); }
}

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

.hero-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-3);
  margin-bottom: 20px;
  padding: 6px 16px;
  border: 1px solid rgba(0, 212, 170, 0.3);
  border-radius: 4px;
  background: rgba(0, 212, 170, 0.05);
}

.hero-content h1 {
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.7;
}

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

.hero-image {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 45%;
  height: 60%;
  background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
  border-radius: 24px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  opacity: 0.6;
}

.hero-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 107, 157, 0.1), rgba(196, 77, 255, 0.1));
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(196, 77, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 40px rgba(196, 77, 255, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--accent-2);
  background: rgba(196, 77, 255, 0.05);
  transform: translateY(-2px);
}

/* ===== 通用区块 ===== */
.section {
  padding: 100px 0;
  position: relative;
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--accent-1);
  margin-bottom: 12px;
  opacity: 0.8;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 36px 28px;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}

.category-card:hover {
  transform: translateY(-8px);
  border-color: rgba(196, 77, 255, 0.3);
  box-shadow: var(--shadow-glow);
}

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

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(255, 107, 157, 0.15), rgba(196, 77, 255, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  transition: transform 0.3s ease;
}

.category-card:hover .card-icon {
  transform: scale(1.1) rotate(-5deg);
}

.category-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.category-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.card-link {
  color: var(--accent-3);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s ease;
}

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

/* ===== 特色区块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 60px 0;
}

.feature-image {
  border-radius: 24px;
  overflow: hidden;
  background: var(--bg-card);
  aspect-ratio: 4/3;
  border: 1px solid var(--border-color);
  position: relative;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 107, 157, 0.05), rgba(0, 212, 170, 0.05));
}

.feature-text h3 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.feature-text p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.feature-list li::before {
  content: '→';
  color: var(--accent-3);
  font-weight: 700;
}

/* ===== 数据栏 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 32px;
  padding: 60px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin: 40px 0;
}

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

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 40px;
  background: var(--border-color);
}

.stat-number {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 900;
  line-height: 1;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.content-wall-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 32px;
  transition: all 0.4s ease;
  position: relative;
}

.content-wall-item:hover {
  border-color: var(--accent-2);
  transform: translateY(-4px);
}

.content-wall-item h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--accent-1);
}

.content-wall-body {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 40px;
  max-width: 800px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(196, 77, 255, 0.3);
}

.faq-item summary {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.3s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent-2);
  transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ===== CTA横幅 ===== */
.cta-banner {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 32px;
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 60px 0;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255, 107, 157, 0.05), transparent 50%);
  animation: ctaShift 10s ease-in-out infinite alternate;
}

@keyframes ctaShift {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-20px, 20px); }
}

.cta-banner h2 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}

.cta-banner p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
  position: relative;
  z-index: 2;
}

.cta-banner .btn {
  position: relative;
  z-index: 2;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 0;
  margin-top: 80px;
}

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

.footer-brand .logo {
  font-size: 1.3rem;
  display: inline-block;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 20px;
  font-weight: 600;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 6px 0;
  transition: color 0.3s ease;
}

.footer-col a:hover {
  color: var(--accent-3);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ===== 辅助类 ===== */
.text-accent {
  color: var(--accent-1);
}

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

.seo-description {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
  max-width: 800px;
  margin: 20px auto;
  text-align: center;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .feature-image {
    aspect-ratio: 16/9;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .hero-image {
    display: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }
  
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 32px 24px;
    gap: 20px;
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-bottom: 1px solid var(--border-color);
  }
  
  .main-nav.active {
    transform: translateY(0);
    opacity: 1;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .hero {
    padding: 100px 0 60px;
  }
  
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  
  .stat-item:not(:last-child)::after {
    display: none;
  }
  
  .content-wall {
    grid-template-columns: 1fr;
  }
  
  .cta-banner {
    padding: 40px 24px;
    border-radius: 20px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .section {
    padding: 60px 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .hero-content h1 {
    font-size: 2rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .stats-bar {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .logo {
    font-size: 1.2rem;
  }
}