/* roulang page: index */
:root {
      --primary: #0A66FF;
      --primary-dark: #004ECC;
      --accent: #00E5FF;
      --bg-dark: #0B0F1A;
      --bg-light: #F5F7FA;
      --glass-bg-dark: rgba(255,255,255,0.05);
      --glass-bg-light: rgba(255,255,255,0.7);
      --text-dark: #1A1D26;
      --text-gray: #6B7280;
      --text-light-gray: #9CA3AF;
      --success: #10D876;
      --warning: #F5A623;
      --white: #FFFFFF;
      --border-light: rgba(255,255,255,0.15);
      --border-dark: rgba(0,0,0,0.06);
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 32px rgba(0,0,0,0.2);
      --shadow-lg: 0 12px 40px rgba(0,0,0,0.3);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
      --transition: 0.3s ease;
    }

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

    body {
      font-family: var(--font-stack);
      line-height: 1.6;
      background-color: var(--bg-light);
      color: var(--text-dark);
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      outline: none;
      transition: var(--transition);
    }

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

    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(11, 15, 26, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 0 20px;
      height: 70px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--white);
      font-weight: 700;
      font-size: 20px;
      letter-spacing: 1px;
    }

    .logo-icon {
      width: 28px;
      height: 28px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
    }

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

    .nav-menu a {
      color: rgba(255,255,255,0.75);
      font-size: 15px;
      font-weight: 500;
      position: relative;
      padding: 4px 0;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--white);
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      box-shadow: 0 0 8px var(--accent);
      transition: width 0.3s ease;
    }

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

    .btn-primary-sm {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: var(--white);
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 14px;
      box-shadow: 0 4px 16px rgba(10,102,255,0.3);
      border: none;
    }

    .btn-primary-sm:hover {
      box-shadow: 0 6px 24px rgba(10,102,255,0.5), 0 0 20px rgba(0,229,255,0.3);
      transform: translateY(-1px);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }

    .hamburger span {
      width: 25px;
      height: 2px;
      background: var(--white);
      border-radius: 2px;
      transition: var(--transition);
    }

    .mobile-nav {
      display: none;
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .mobile-nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(11, 15, 26, 0.95);
        backdrop-filter: blur(16px);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 28px;
        transform: translateX(100%);
        transition: transform 0.4s ease;
        z-index: 999;
      }
      .mobile-nav.open {
        transform: translateX(0);
      }
      .mobile-nav a {
        color: rgba(255,255,255,0.9);
        font-size: 22px;
        font-weight: 500;
      }
    }

    /* 首屏 */
    .hero {
      min-height: 100vh;
      background: linear-gradient(135deg, #0B0F1A 0%, #0A1A3A 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      overflow: hidden;
      padding: 100px 20px 60px;
    }

    .particles {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
    }

    .particle {
      position: absolute;
      background: rgba(255,255,255,0.08);
      border-radius: 50%;
      animation: float 8s infinite ease-in-out;
      box-shadow: 0 0 12px rgba(0,229,255,0.2);
    }

    @keyframes float {
      0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
      50% { transform: translateY(-40px) scale(1.2); opacity: 0.7; }
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      animation: fadeInUp 0.9s ease;
    }

    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(30px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .hero h1 {
      font-size: clamp(36px, 6vw, 60px);
      font-weight: 700;
      color: var(--white);
      line-height: 1.2;
      margin-bottom: 20px;
      text-shadow: 0 0 30px rgba(0,229,255,0.35);
    }

    .hero h2 {
      font-size: clamp(18px, 2.5vw, 24px);
      font-weight: 400;
      color: rgba(255,255,255,0.7);
      margin-bottom: 24px;
    }

    .hero p {
      color: rgba(255,255,255,0.65);
      max-width: 600px;
      margin: 0 auto 36px;
      font-size: 16px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      gap: 18px;
      justify-content: center;
      flex-wrap: wrap;
    }

    @media (max-width: 480px) {
      .hero-buttons {
        flex-direction: column;
        align-items: stretch;
      }
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: var(--white);
      padding: 14px 36px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 16px;
      box-shadow: 0 4px 20px rgba(10,102,255,0.4);
      border: none;
      display: inline-block;
    }

    .btn-primary:hover {
      box-shadow: 0 8px 30px rgba(10,102,255,0.6), 0 0 24px rgba(0,229,255,0.4);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      color: var(--white);
      padding: 14px 36px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 16px;
      border: 2px solid var(--white);
      display: inline-block;
    }

    .btn-outline:hover {
      background: rgba(255,255,255,0.1);
      border-color: var(--accent);
      color: var(--accent);
      transform: translateY(-2px);
    }

    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: rgba(255,255,255,0.6);
      font-size: 28px;
      animation: bounce 2s infinite;
    }

    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
      40% { transform: translateX(-50%) translateY(-12px); }
      60% { transform: translateX(-50%) translateY(-6px); }
    }

    /* 通用区块 */
    section {
      padding: 80px 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 48px 0;
      }
    }

    .section-title {
      font-size: clamp(28px, 4vw, 40px);
      font-weight: 600;
      margin-bottom: 16px;
      position: relative;
    }

    .section-subtitle {
      color: var(--text-gray);
      font-size: 16px;
      margin-bottom: 48px;
    }

    .dark-bg {
      background: var(--bg-dark);
      color: var(--white);
    }

    .light-bg {
      background: var(--bg-light);
    }

    .white-bg {
      background: var(--white);
    }

    /* 痛点区 */
    .pain-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    @media (max-width: 768px) {
      .pain-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }

    .pain-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 28px;
    }

    .pain-icon {
      font-size: 28px;
      color: var(--primary);
      flex-shrink: 0;
    }

    /* 卡片网格 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    @media (max-width: 992px) {
      .card-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .card-grid {
        grid-template-columns: 1fr;
      }
    }

    .glass-card {
      background: rgba(255,255,255,0.06);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: 0 8px 28px rgba(0,0,0,0.25);
      transition: all 0.3s ease;
      text-align: center;
    }

    .glass-card:hover {
      transform: translateY(-8px);
      border-color: rgba(10,102,255,0.6);
      box-shadow: 0 14px 36px rgba(10,102,255,0.25);
    }

    .glass-card .icon {
      font-size: 42px;
      color: var(--accent);
      margin-bottom: 20px;
    }

    .glass-card h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .glass-card p {
      color: rgba(255,255,255,0.7);
      line-height: 1.6;
    }

    .white-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      overflow: hidden;
    }

    .white-card:hover {
      box-shadow: 0 12px 28px rgba(0,0,0,0.1);
      transform: translateY(-4px);
    }

    .match-card img {
      aspect-ratio: 16/9;
      object-fit: cover;
      border-radius: 12px 12px 0 0;
      width: 100%;
    }

    .match-info {
      padding: 18px 0 8px;
    }

    .match-info h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 8px;
    }

    .text-link {
      color: var(--primary);
      font-weight: 600;
      font-size: 14px;
    }

    .text-link:hover {
      color: var(--accent);
    }

    /* 证言 */
    .testimonial-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 48px;
      align-items: start;
    }

    @media (max-width: 768px) {
      .testimonial-layout {
        grid-template-columns: 1fr;
      }
    }

    .testimonial-card {
      background: rgba(255,255,255,0.65);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(0,0,0,0.08);
      border-radius: var(--radius-lg);
      padding: 28px;
      margin-bottom: 24px;
      transition: all 0.3s ease;
    }

    .testimonial-card:hover {
      border-color: var(--primary);
      box-shadow: 0 8px 24px rgba(10,102,255,0.15);
    }

    .user-info {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }

    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      object-fit: cover;
      background: #ccc;
    }

    .stars {
      color: var(--warning);
      letter-spacing: 2px;
    }

    blockquote {
      font-style: italic;
      color: var(--text-gray);
      margin-top: 10px;
    }

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

    .faq-item {
      border-bottom: 1px solid rgba(0,0,0,0.06);
      padding: 20px 0;
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 17px;
    }

    .faq-icon {
      font-size: 22px;
      color: var(--text-gray);
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-gray);
      margin-top: 8px;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
    }

    /* CTA 大区块 */
    .cta-section {
      background: linear-gradient(135deg, #0B1A2E, #0A2647);
    }

    .btn-giant {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: var(--white);
      padding: 18px 54px;
      font-size: 20px;
      font-weight: 700;
      border-radius: 50px;
      box-shadow: 0 8px 30px rgba(10,102,255,0.5);
      animation: pulse 2.5s infinite;
      display: inline-block;
      margin-top: 24px;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(0,229,255,0.5); }
      70% { box-shadow: 0 0 28px 12px rgba(0,229,255,0.2); }
      100% { box-shadow: 0 0 0 0 rgba(0,229,255,0); }
    }

    .disclaimer {
      color: rgba(255,255,255,0.45);
      font-size: 13px;
      margin-top: 16px;
    }

    /* Footer */
    .footer {
      background: #060B14;
      color: rgba(255,255,255,0.7);
      padding: 60px 0 20px;
      border-top: 1px solid rgba(255,255,255,0.08);
    }

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

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
    }

    .footer-col h4 {
      color: var(--white);
      margin-bottom: 18px;
      font-weight: 600;
    }

    .footer-col a {
      display: block;
      color: #9CA3AF;
      margin-bottom: 10px;
      font-size: 15px;
    }

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

    .social-icons {
      display: flex;
      gap: 16px;
      margin-top: 12px;
    }

    .social-circle {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      transition: 0.3s;
    }

    .social-circle:hover {
      background: var(--primary);
      border-color: var(--primary);
    }

    .copyright {
      text-align: center;
      color: #9CA3AF;
      font-size: 14px;
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 24px;
    }