/* ===== 全局重置与变量 ===== */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    }

    :root {
      --primary: #FF6B35;      /* 橘红色主色调 */
      --primary-dark: #E55A2B;
      --primary-light: #FF8A5C;
      --secondary: #2D2D2D;
      --gray-bg: #F9FAFB;
      --card-bg: #FFFFFF;
      --text-dark: #1F2937;
      --text-light: #6B7280;
      --border-light: #F0F0F0;
      --shadow-sm: 0 10px 25px -5px rgba(255, 107, 53, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
      --shadow-md: 0 20px 30px -10px rgba(255, 107, 53, 0.12), 0 8px 20px -8px rgba(0, 0, 0, 0.04);
      --radius-card: 24px;
      --radius-btn: 40px;
    }

    body {
      background-color: var(--gray-bg);
      color: var(--text-dark);
      line-height: 1.5;
      scroll-behavior: smooth;
    }

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

    /* ===== 按钮样式 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 30px;
      font-weight: 600;
      font-size: 1rem;
      border-radius: var(--radius-btn);
      transition: all 0.2s ease;
      cursor: pointer;
      border: none;
      text-decoration: none;
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--primary);
      color: white;
      box-shadow: 0 8px 18px -6px rgba(255, 107, 53, 0.4);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 14px 24px -8px rgba(255, 107, 53, 0.5);
    }

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

    .btn-outline:hover {
      background-color: rgba(255, 107, 53, 0.08);
      transform: translateY(-2px);
    }

    .btn-white {
      background-color: white;
      color: var(--primary-dark);
      font-weight: 600;
    }

    .btn-white:hover {
      background-color: #f9f9f9;
      transform: translateY(-2px);
      box-shadow: 0 12px 20px -10px rgba(0, 0, 0, 0.15);
    }

    /* ===== 头部导航 ===== */
    .navbar {
      padding: 18px 0;
      background: white;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
      border-bottom: 1px solid rgba(255, 107, 53, 0.1);
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(8px);
      background: rgba(255, 255, 255, 0.92);
    }

    .navbar .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .logo-area img {
      height: 44px;
      width: auto;
      object-fit: contain;
      border-radius: 10px;
      transition: transform 0.2s;
    }

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

    .logo-text {
      font-size: 1.8rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--secondary);
    }

    .logo-text span {
      color: var(--primary);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      font-weight: 500;
      color: var(--text-dark);
    }

    .nav-links a {
      text-decoration: none;
      color: inherit;
      font-size: 1rem;
      transition: color 0.2s;
      position: relative;
    }

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

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.2s;
    }

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

    .nav-buttons {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* ===== 英雄区域 ===== */
    .hero {
      padding: 40px 0 60px;
      background: radial-gradient(circle at 0% 30%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
    }

    .hero .container {
      display: flex;
      align-items: center;
      gap: 40px;
      flex-wrap: wrap;
    }

    .hero-content {
      flex: 1 1 420px;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      background: rgba(255, 107, 53, 0.12);
      color: var(--primary-dark);
      padding: 8px 18px;
      border-radius: 40px;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
      gap: 8px;
    }

    .hero-badge i {
      font-size: 1rem;
    }

    .hero h1 {
      font-size: 3.2rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }

    .hero h1 span {
      color: var(--primary);
      position: relative;
      display: inline-block;
    }

    .hero h1 span::after {
      content: '';
      position: absolute;
      bottom: 8px;
      left: 0;
      width: 100%;
      height: 8px;
      background: rgba(255, 107, 53, 0.2);
      border-radius: 4px;
      z-index: -1;
    }

    .hero p {
      font-size: 1.2rem;
      color: var(--text-light);
      margin-bottom: 32px;
      max-width: 580px;
    }

    .hero-stats {
      display: flex;
      gap: 32px;
      margin-top: 40px;
    }

    .stat-item h3 {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
    }

    .stat-item p {
      font-size: 0.9rem;
      color: var(--text-light);
      margin-bottom: 0;
    }

    .hero-image {
      flex: 1 1 360px;
      display: flex;
      justify-content: center;
      position: relative;
    }

    .hero-card {
      background: white;
      padding: 30px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-md);
      width: 100%;
      max-width: 400px;
      border: 1px solid rgba(255, 107, 53, 0.1);
      transform: rotate(2deg);
      transition: transform 0.3s ease;
    }

    .hero-card:hover {
      transform: rotate(0deg) scale(1.01);
    }

    .hero-card .earn-label {
      font-size: 0.9rem;
      color: var(--text-light);
      display: flex;
      justify-content: space-between;
      margin-bottom: 16px;
    }

    .hero-card .earn-label i {
      color: var(--primary);
    }

    .hero-card .amount {
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -1px;
      margin-bottom: 24px;
    }

    .hero-card .amount small {
      font-size: 1rem;
      font-weight: 500;
      color: var(--text-light);
    }

    .progress-block {
      background: #f1f3f5;
      height: 10px;
      border-radius: 20px;
      margin: 16px 0;
      overflow: hidden;
    }

    .progress-fill {
      height: 100%;
      width: 73%;
      background: var(--primary);
      border-radius: 20px;
      box-shadow: 0 0 12px rgba(255, 107, 53, 0.5);
    }

    .hero-card .meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.9rem;
      color: var(--text-light);
      margin-bottom: 24px;
    }

    .hero-card .meta i {
      color: var(--primary);
      margin-right: 5px;
    }

    /* ===== 合作品牌条 ===== */
    .brands {
      padding: 30px 0;
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
      background: white;
    }

    .brands .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }

    .brands p {
      font-weight: 600;
      color: var(--text-light);
      font-size: 0.95rem;
      letter-spacing: 0.3px;
    }

    .brand-logos {
      display: flex;
      gap: 48px;
      flex-wrap: wrap;
      align-items: center;
    }

    .brand-logos i {
      font-size: 2rem;
      color: #cbd5e1;
      transition: color 0.2s;
    }

    .brand-logos i:hover {
      color: var(--primary);
    }

    /* ===== 特性区块 ===== */
    .features {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 56px;
    }

    .section-header h2 {
      font-size: 2.5rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }

    .section-header h2 i {
      color: var(--primary);
      margin-right: 8px;
    }

    .section-header p {
      font-size: 1.15rem;
      color: var(--text-light);
      max-width: 600px;
      margin: 0 auto;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 30px;
    }

    .feature-card {
      background: var(--card-bg);
      padding: 32px 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(255, 107, 53, 0.06);
      transition: all 0.25s ease;
      text-align: center;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 107, 53, 0.2);
    }

    .feature-icon {
      background: rgba(255, 107, 53, 0.1);
      width: 70px;
      height: 70px;
      border-radius: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 24px;
    }

    .feature-icon i {
      font-size: 2rem;
      color: var(--primary);
    }

    .feature-card h3 {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .feature-card p {
      color: var(--text-light);
      font-size: 0.95rem;
    }

    /* ===== 数据统计区块 ===== */
    .stats-section {
      background: linear-gradient(135deg, #FFF5F0 0%, #FFFFFF 100%);
      padding: 70px 0;
      border-radius: 0;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }

    .stat-card {
      background: white;
      padding: 30px 20px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(255, 107, 53, 0.1);
    }

    .stat-card i {
      font-size: 2.2rem;
      color: var(--primary);
      margin-bottom: 16px;
    }

    .stat-card h3 {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--secondary);
      letter-spacing: -0.5px;
      margin-bottom: 8px;
    }

    .stat-card p {
      color: var(--text-light);
      font-weight: 500;
    }

    /* ===== 号召行动 ===== */
    .cta {
      padding: 80px 0;
    }

    .cta .container {
      background: linear-gradient(135deg, var(--primary) 0%, #FF8A5C 100%);
      border-radius: 40px;
      padding: 60px 40px;
      text-align: center;
      box-shadow: 0 30px 40px -20px rgba(255, 107, 53, 0.5);
    }

    .cta h2 {
      font-size: 2.8rem;
      font-weight: 800;
      color: white;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .cta p {
      color: rgba(255, 255, 255, 0.9);
      font-size: 1.2rem;
      max-width: 600px;
      margin: 0 auto 32px;
    }

    .cta-buttons {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }

    /* ===== 页脚 ===== */
    .footer {
      background: white;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255, 107, 53, 0.15);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand .logo-area {
      margin-bottom: 16px;
    }

    .footer-brand p {
      color: var(--text-light);
      font-size: 0.95rem;
      max-width: 300px;
      margin-bottom: 20px;
    }

    .social-icons {
      display: flex;
      gap: 16px;
    }

    .social-icons a {
      background: #f1f3f5;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-dark);
      transition: all 0.2s;
    }

    .social-icons a:hover {
      background: var(--primary);
      color: white;
      transform: translateY(-3px);
    }

    .footer-col h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 20px;
      color: var(--secondary);
    }

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

    .footer-col ul li {
      margin-bottom: 12px;
    }

    .footer-col ul li a {
      text-decoration: none;
      color: var(--text-light);
      transition: color 0.2s;
      font-size: 0.95rem;
    }

    .footer-col ul li a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid var(--border-light);
      color: var(--text-light);
      font-size: 0.9rem;
    }

    /* ===== 响应式调整 ===== */
    @media (max-width: 1024px) {
      .hero h1 { font-size: 2.6rem; }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .navbar .container { flex-direction: column; align-items: stretch; }
      .nav-links { justify-content: center; flex-wrap: wrap; gap: 16px; }
      .nav-buttons { justify-content: center; }
      .hero .container { flex-direction: column; text-align: center; }
      .hero p { margin-left: auto; margin-right: auto; }
      .hero-stats { justify-content: center; }
      .hero-card { transform: rotate(0); }
      .cta h2 { font-size: 2rem; }
      .section-header h2 { font-size: 2rem; }
    }

    @media (max-width: 600px) {
      .stats-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; gap: 30px; }
      .hero h1 { font-size: 2.2rem; }
      .brand-logos { gap: 24px; justify-content: center; }
      .brand-logos i { font-size: 1.6rem; }
      .cta .container { padding: 40px 20px; }
    }
    
    /* ===== 移动端优化（仅 ≤768px 生效，PC 端不变） ===== */
@media (max-width: 768px) {

  /* 1. 英雄区按钮组居中 */
  .hero-content > div[style*="display: flex"] {
    justify-content: center;
  }

  /* 2. 合作品牌条居中 */
  .brands .container {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .brand-logos {
    justify-content: center;
  }

  /* 3. 页脚：品牌区独立一行，三个 footer-col 另起一行并排 */
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px 16px;
  }

  /* 品牌区跨满整行，独立一行 */
  .footer-brand {
    grid-column: 1 / -1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 8px;
  }
  .footer-brand .logo-area {
    justify-content: center;
  }
  .footer-brand p {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
  }
  .social-icons {
    justify-content: center;
  }

  /* 三个 footer-col 各占一列，文字居中 */
  .footer-col {
    text-align: center;
  }
  .footer-col ul {
    padding: 0;
  }
}

/* ===== 导航高亮 ===== */
.nav-links a.active {
  color: var(--primary);
}
.nav-links a.active::after {
  width: 100%;
  background: var(--primary);
}