/* roulang page: index */
:root {
      --deep-space: #0B0C10;
      --dark-purple: #1A1040;
      --deep-blue: #0D1528;
      --electric-violet: #7B2FF7;
      --violet-glow: #9D4EDD;
      --starlight-silver: #E0E7FF;
      --competition-orange: #FF6B35;
      --orange-glow: #FF8C42;
      --card-bg: rgba(20, 20, 40, 0.7);
      --card-border: rgba(123, 47, 247, 0.3);
      --card-hover-border: rgba(123, 47, 247, 0.6);
      --text-primary: #F0F2FF;
      --text-secondary: #b4b8d6;
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-full: 50px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-glow: 0 0 40px rgba(123, 47, 247, 0.4);
      --transition-bounce: 0.25s cubic-bezier(0.2, 0.9, 0.4, 1);
    }

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

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background: radial-gradient(circle at 30% 10%, #1A1040 0%, #0B0C10 70%, #0D1528 100%);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      background-attachment: fixed;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* 星空粒子纹理背景 */
    body::before {
      content: "";
      position: fixed;
      inset: 0;
      background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
      background-size: 64px 64px;
      pointer-events: none;
      z-index: 0;
    }

    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 72px;
      background: rgba(10, 10, 20, 0.7);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 40px;
      z-index: 100;
      border-bottom: 1px solid rgba(123, 47, 247, 0.2);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 24px;
      font-weight: 700;
      letter-spacing: 2px;
      background: linear-gradient(135deg, #E0E7FF 0%, #9D4EDD 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      text-decoration: none;
    }

    .logo-icon {
      font-size: 28px;
      filter: drop-shadow(0 0 8px #7B2FF7);
    }

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

    .nav-link {
      color: var(--starlight-silver);
      text-decoration: none;
      font-weight: 500;
      font-size: 16px;
      position: relative;
      transition: color 0.2s;
      padding: 8px 0;
    }

    .nav-link::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--competition-orange);
      transition: width 0.25s ease;
      box-shadow: 0 0 12px var(--orange-glow);
    }

    .nav-link:hover {
      color: var(--competition-orange);
    }

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

    /* 移动端底部导航 */
    .mobile-nav {
      display: none;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      padding: 120px 24px 80px;
    }

    .hero-bg {
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.25;
      z-index: 1;
      mask-image: radial-gradient(circle at center, black 40%, transparent 90%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
    }

    h1 {
      font-family: 'PingFang SC Bold', 'Microsoft YaHei Bold', sans-serif;
      font-size: clamp(36px, 6vw, 56px);
      font-weight: 700;
      letter-spacing: 2px;
      line-height: 1.3;
      margin-bottom: 24px;
      background: linear-gradient(to right, #ffffff, #E0E7FF, #9D4EDD);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 20px;
      color: var(--starlight-silver);
      margin-bottom: 48px;
      opacity: 0.9;
    }

    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--competition-orange), var(--orange-glow));
      color: #fff;
      border: none;
      padding: 16px 48px;
      border-radius: 50px;
      font-weight: 700;
      font-size: 18px;
      letter-spacing: 1px;
      cursor: pointer;
      transition: all 0.25s;
      box-shadow: 0 10px 28px rgba(255, 107, 53, 0.4);
      text-decoration: none;
      display: inline-block;
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 18px 36px rgba(255, 107, 53, 0.6);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--electric-violet);
      color: var(--starlight-silver);
      padding: 16px 48px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      transition: all 0.25s;
      text-decoration: none;
    }

    .btn-outline:hover {
      background: rgba(123, 47, 247, 0.15);
      border-color: var(--violet-glow);
      color: white;
    }

    /* 通用板块 */
    section {
      padding: 100px 0;
      position: relative;
      z-index: 2;
    }

    .section-header {
      text-align: center;
      margin-bottom: 64px;
    }

    .section-symbol {
      display: inline-block;
      color: var(--competition-orange);
      font-size: 20px;
      margin-right: 8px;
    }

    h2 {
      font-size: 36px;
      font-weight: 700;
      letter-spacing: 1px;
      margin-bottom: 16px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      backdrop-filter: blur(12px);
      transition: all var(--transition-bounce);
      box-shadow: var(--shadow-card);
    }

    .card:hover {
      transform: translateY(-8px);
      border-color: var(--card-hover-border);
      box-shadow: var(--shadow-glow);
    }

    .card-icon {
      font-size: 36px;
      margin-bottom: 20px;
    }

    .card h3 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .badge {
      display: inline-block;
      background: rgba(123, 47, 247, 0.2);
      border: 1px solid var(--electric-violet);
      color: #d4bfff;
      padding: 6px 18px;
      border-radius: 40px;
      font-size: 14px;
      font-weight: 600;
      margin-top: 16px;
    }

    .data-badge {
      font-size: 32px;
      font-weight: 800;
      color: var(--competition-orange);
    }

    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .testimonial-card {
      background: rgba(25, 25, 45, 0.8);
      border-radius: 24px;
      padding: 36px;
      display: flex;
      gap: 20px;
      align-items: flex-start;
    }

    .avatar {
      width: 64px;
      height: 64px;
      background: #2a2a4a;
      border-radius: 50%;
      background-image: url('/assets/images/coverpic/cover-2.webp');
      background-size: cover;
    }

    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 20px;
      margin-bottom: 16px;
      padding: 24px;
      cursor: pointer;
      transition: 0.2s;
    }

    .faq-item.active {
      border-color: var(--electric-violet);
      box-shadow: 0 0 24px rgba(123, 47, 247, 0.3);
    }

    .faq-question {
      font-weight: 700;
      color: var(--competition-orange);
      display: flex;
      justify-content: space-between;
    }

    .faq-answer {
      margin-top: 12px;
      color: #ccc;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .cta-section {
      background: linear-gradient(180deg, rgba(26, 16, 64, 0.8) 0%, #0B0C10 100%);
      text-align: center;
    }

    footer {
      background: #050510;
      padding: 80px 0 40px;
      border-top: 2px solid var(--electric-violet);
    }

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

    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 12px;
        left: 12px;
        right: 12px;
        background: rgba(10, 10, 25, 0.9);
        backdrop-filter: blur(30px);
        border-radius: 40px;
        padding: 12px 24px;
        justify-content: space-around;
        z-index: 200;
        border: 1px solid rgba(123, 47, 247, 0.4);
      }
      .mobile-nav a {
        color: var(--starlight-silver);
        font-size: 13px;
        text-decoration: none;
        display: flex;
        flex-direction: column;
        align-items: center;
      }
      .grid-3, .testimonial-grid { grid-template-columns: 1fr; }
      .container { padding: 0 20px; }
      h2 { font-size: 28px; }
    }