/* roulang page: index */
:root {
      --primary-orange: #FF4D00;
      --primary-orange-hover: #E04400;
      --secondary-purple: #1A0033;
      --accent-gold: #FFD700;
      --bg-dark: #0F0F0F;
      --surface-dark: #1C1C1C;
      --text-light: #F5F5F5;
      --text-muted: #A0A0A0;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 4px 20px rgba(255, 77, 0, 0.08);
      --shadow-card-hover: 0 8px 30px rgba(255, 77, 0, 0.2);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --transition-base: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-dark);
      color: var(--text-light);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: var(--transition-base);
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    @media (max-width: 768px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }

    /* 导航品牌行 */
    .brand-row {
      height: 64px;
      background-color: var(--secondary-purple);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 20px;
    }
    .logo-text {
      font-size: 1.6rem;
      font-weight: 800;
      letter-spacing: 2px;
      color: var(--text-light);
    }
    .logo-text span {
      color: var(--primary-orange);
    }
    .btn-primary-nav {
      background: var(--primary-orange);
      color: white;
      padding: 8px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.95rem;
      border: none;
      white-space: nowrap;
    }
    .btn-primary-nav:hover {
      background: var(--primary-orange-hover);
      box-shadow: 0 0 12px var(--accent-gold);
    }

    /* 频道行 */
    .channel-row {
      background: var(--bg-dark);
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-bottom: 2px solid rgba(255,77,0,0.3);
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }
    .channel-row::-webkit-scrollbar {
      display: none;
    }
    .channel-tag {
      display: inline-block;
      background: var(--secondary-purple);
      color: var(--text-light);
      padding: 6px 18px;
      border-radius: 20px;
      font-size: 0.9rem;
      font-weight: 500;
      margin: 0 5px;
      transition: var(--transition-base);
      white-space: nowrap;
    }
    .channel-tag:hover {
      background: var(--primary-orange);
      color: white;
    }
    .channel-tag.active {
      background: var(--primary-orange);
      color: white;
      border-bottom: 2px solid var(--accent-gold);
      border-radius: 20px 20px 0 0;
    }

    /* Hero */
    .hero-section {
      min-height: 90vh;
      background: linear-gradient(135deg, #1A0033 0%, #0F0F0F 70%);
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
    }
    .hero-bg-img {
      position: absolute;
      right: 0;
      top: 0;
      width: 50%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.45;
      mask-image: linear-gradient(to left, black 30%, transparent);
      -webkit-mask-image: linear-gradient(to left, black 30%, transparent);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 600px;
    }
    .hero-title {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1.2rem;
      color: white;
    }
    .hero-title span {
      color: var(--primary-orange);
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 2rem;
    }
    .btn-glow {
      background: var(--primary-orange);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1rem;
      border: none;
      margin-right: 15px;
      display: inline-block;
    }
    .btn-glow:hover {
      background: var(--primary-orange-hover);
      box-shadow: 0 0 15px var(--accent-gold);
      transform: translateY(-2px);
    }
    .btn-outline-gold {
      background: transparent;
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 12px 30px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-outline-gold:hover {
      background: var(--accent-gold);
      color: var(--secondary-purple);
    }

    /* 通用区块 */
    .section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 2.5rem;
      text-align: center;
      color: white;
    }
    .section-title span {
      color: var(--primary-orange);
    }

    /* 优势卡片 */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--surface-dark);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
      text-align: left;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-5px);
    }
    .feature-icon {
      font-size: 48px;
      color: var(--primary-orange);
      margin-bottom: 18px;
    }
    .feature-card h3 {
      font-size: 1.4rem;
      font-weight: 600;
      margin-bottom: 10px;
    }
    .feature-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* 场景交替 */
    .scenario-row {
      display: flex;
      align-items: center;
      margin-bottom: 60px;
      gap: 40px;
    }
    .scenario-row.reverse {
      flex-direction: row-reverse;
    }
    .scenario-img {
      flex: 1;
      border-radius: var(--radius-card);
      overflow: hidden;
    }
    .scenario-img img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .scenario-text {
      flex: 1;
    }
    .scenario-text h3 {
      font-size: 1.8rem;
      font-weight: 700;
      margin-bottom: 15px;
    }
    .text-link {
      color: var(--primary-orange);
      font-weight: 600;
      display: inline-block;
      margin-top: 15px;
      border-bottom: 1px solid transparent;
    }
    .text-link:hover {
      border-bottom: 1px solid var(--primary-orange);
    }

    /* 案例数字卡片 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-card {
      background: rgba(28,28,28,0.8);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-card);
      padding: 32px 20px;
      border: 1px solid rgba(255,77,0,0.15);
    }
    .stat-number {
      font-size: 3.2rem;
      font-weight: 900;
      color: var(--accent-gold);
    }

    /* 方案卡片 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pricing-card {
      background: var(--surface-dark);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      border: 1px solid transparent;
      transition: var(--transition-base);
    }
    .pricing-card.popular {
      border: 2px solid var(--accent-gold);
      position: relative;
    }
    .badge-hot {
      background: var(--accent-gold);
      color: var(--secondary-purple);
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.8rem;
      position: absolute;
      top: -12px;
      right: 20px;
    }
    .price {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent-gold);
      margin: 15px 0;
    }
    .check-list li {
      list-style: none;
      margin-bottom: 8px;
      color: var(--text-muted);
    }
    .check-list li i {
      color: var(--primary-orange);
      margin-right: 8px;
    }

    /* FAQ */
    .faq-container {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--secondary-purple);
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-answer {
      background: var(--surface-dark);
      color: var(--text-muted);
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.4s ease;
    }
    .faq-item.active .faq-answer {
      padding: 18px 24px;
      max-height: 200px;
    }
    .faq-item.active .faq-question {
      border-left: 4px solid var(--primary-orange);
    }

    /* 页脚 CTA */
    .footer-cta {
      background: linear-gradient(135deg, #FF4D00, #B83500);
      text-align: center;
      padding: 70px 20px;
    }
    .footer-bottom {
      background: var(--secondary-purple);
      padding: 24px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      color: var(--text-muted);
    }

    @media (max-width: 768px) {
      .hero-title { font-size: 2.2rem; }
      .section-title { font-size: 1.6rem; }
      .feature-grid, .stats-grid, .pricing-grid { grid-template-columns: 1fr; }
      .scenario-row, .scenario-row.reverse { flex-direction: column; }
      .hero-bg-img { width: 100%; opacity: 0.3; }
      .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
    }