/* roulang page: index */
:root {
      --brand-purple: #7B2FF7;
      --brand-orange: #FF6B35;
      --deep-blue: #0F0E17;
      --fog-gray: #F4F5F9;
      --neon-cyan: #00F0FF;
      --white: #ffffff;
      --text-primary: #1E1E2E;
      --text-secondary: #5A5A72;
      --text-light: #9A9AB0;
      --border-light: #E8E9F0;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
      --radius-card: 16px;
      --radius-large: 24px;
      --radius-btn: 50px;
      --transition: all 0.25s ease;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--white);
      color: var(--text-primary);
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 导航 */
    .navbar-vsports {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      z-index: 1000;
      display: flex;
      align-items: center;
      padding: 0 32px;
    }

    .nav-logo {
      display: flex;
      align-items: center;
      font-weight: 700;
      font-size: 22px;
      color: var(--deep-blue);
      letter-spacing: -0.5px;
      margin-right: auto;
    }

    .nav-logo i {
      color: var(--brand-purple);
      font-size: 28px;
      margin-right: 8px;
      background: linear-gradient(135deg, var(--brand-purple), var(--brand-orange));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      margin-right: 32px;
    }

    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-secondary);
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--brand-purple);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .search-icon {
      font-size: 18px;
      color: var(--text-secondary);
      cursor: pointer;
      transition: var(--transition);
    }

    .search-icon:hover {
      color: var(--brand-purple);
    }

    .btn-login {
      background: transparent;
      border: 1px solid var(--border-light);
      color: var(--text-primary);
      padding: 8px 20px;
      border-radius: var(--radius-btn);
      font-size: 14px;
      font-weight: 500;
      background: white;
    }

    .btn-login:hover {
      border-color: var(--brand-purple);
      color: var(--brand-purple);
    }

    .btn-primary-gradient {
      background: linear-gradient(135deg, var(--brand-purple), var(--brand-orange));
      border: none;
      color: white;
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 14px;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(123,47,247,0.25);
      white-space: nowrap;
    }

    .btn-primary-gradient:hover {
      background: linear-gradient(135deg, var(--brand-orange), var(--brand-purple));
      box-shadow: 0 0 20px rgba(123,47,247,0.5);
      transform: translateY(-1px);
      color: white;
    }

    .btn-outline-light {
      background: transparent;
      border: 1px solid white;
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
    }

    .btn-outline-light:hover {
      background: rgba(255,255,255,0.15);
      color: white;
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--deep-blue);
    }

    /* Hero */
    .hero-section {
      min-height: 90vh;
      background: linear-gradient(135deg, rgba(15,14,23,0.7), rgba(15,14,23,0.5)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      padding-top: 64px;
      position: relative;
    }

    .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 40px;
    }

    .hero-text {
      flex: 1 1 500px;
      color: white;
    }

    .hero-text h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
    }

    .hero-text .subtitle {
      font-size: 20px;
      font-weight: 400;
      opacity: 0.9;
      margin-bottom: 32px;
    }

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

    .hero-image {
      flex: 1 1 400px;
      display: flex;
      justify-content: center;
    }

    .hero-image img {
      max-height: 450px;
      filter: drop-shadow(0 20px 30px rgba(0,0,0,0.4));
      animation: float 6s ease-in-out infinite;
    }

    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-12px); }
      100% { transform: translateY(0px); }
    }

    /* 通用板块 */
    .section-padding {
      padding: 100px 0;
    }

    .section-title {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--deep-blue);
    }

    .section-subtitle {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 48px;
    }

    /* 痛点卡片 */
    .pain-card {
      background: var(--fog-gray);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      transition: var(--transition);
      height: 100%;
    }

    .pain-card:hover {
      border-color: var(--brand-purple);
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .pain-icon {
      font-size: 32px;
      color: var(--brand-purple);
      margin-bottom: 20px;
    }

    /* 解决方案图文 */
    .solution-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
      flex-wrap: wrap;
    }

    .solution-text {
      flex: 1 1 400px;
    }

    .solution-image {
      flex: 1 1 400px;
      border-radius: var(--radius-card);
      overflow: hidden;
    }

    .badge-metric {
      background: rgba(0,240,255,0.1);
      color: var(--neon-cyan);
      font-weight: 700;
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 14px;
      display: inline-block;
      margin-top: 16px;
    }

    /* 成果大卡 */
    .result-card {
      background: linear-gradient(135deg, var(--brand-purple), var(--brand-orange));
      border-radius: var(--radius-large);
      padding: 40px 24px;
      color: white;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .result-number {
      font-size: 56px;
      font-weight: 800;
      display: block;
    }

    .result-label {
      font-size: 16px;
      opacity: 0.9;
    }

    /* 证言卡片 */
    .testimonial-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px;
      border-left: 4px solid var(--brand-purple);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      height: 100%;
    }

    .testimonial-card:hover {
      box-shadow: var(--shadow-hover);
    }

    .testimonial-text {
      font-style: italic;
      margin-bottom: 20px;
      color: var(--text-primary);
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .testimonial-author img {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      object-fit: cover;
    }

    /* FAQ */
    .accordion-button {
      font-weight: 600;
      background-color: #FAFAFC;
      border: none;
      box-shadow: none;
    }

    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border-light);
      background: transparent;
    }

    .accordion-button:not(.collapsed) {
      background-color: #FAFAFC;
      color: var(--brand-purple);
      box-shadow: none;
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, var(--brand-purple), var(--brand-orange));
      padding: 100px 0;
      text-align: center;
      color: white;
    }

    /* 页脚 */
    .footer {
      background: var(--deep-blue);
      color: #B0B0C0;
      padding: 60px 0 30px;
    }

    .footer a {
      color: #B0B0C0;
      font-size: 14px;
    }

    .footer a:hover {
      color: white;
    }

    .footer h5 {
      color: white;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .social-icons i {
      font-size: 20px;
      margin-right: 16px;
      border: 1px solid #5A5A72;
      border-radius: 50%;
      padding: 8px;
      transition: var(--transition);
    }

    .social-icons i:hover {
      background: linear-gradient(135deg, var(--brand-purple), var(--brand-orange));
      border-color: transparent;
      color: white;
    }

    @media (max-width: 992px) {
      .hero-text h1 {
        font-size: 38px;
      }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-actions .btn-login, .nav-actions .btn-primary-gradient {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-section {
        min-height: 70vh;
      }
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
      .section-padding {
        padding: 60px 0;
      }
      .section-title {
        font-size: 30px;
      }
      .result-number {
        font-size: 40px;
      }
    }

    @media (max-width: 576px) {
      .hero-text h1 {
        font-size: 32px;
      }
      .hero-text .subtitle {
        font-size: 16px;
      }
      .solution-row {
        flex-direction: column;
      }
    }