/* roulang page: index */
:root {
      --primary: #6C3CE0;
      --primary-glow: #8B5CF6;
      --accent: #00E5FF;
      --bg-deep: #0A0A14;
      --bg-card: #1A1A2E;
      --bg-light: #F5F0FF;
      --text-primary: #FFFFFF;
      --text-secondary: #B0B0CC;
      --text-muted: #7A7A9A;
      --border-glow: rgba(108, 60, 224, 0.35);
      --border-accent: rgba(0, 229, 255, 0.6);
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --shadow-card: 0 10px 28px rgba(0, 0, 0, 0.6);
      --shadow-glow: 0 0 24px rgba(108, 60, 224, 0.45);
      --transition: all 0.25s ease;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-deep);
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg-deep);
      color: var(--text-primary);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 10, 20, 0.88);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(108, 60, 224, 0.4);
      z-index: 1000;
      transition: var(--transition);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 1.7rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: white;
      text-decoration: none;
    }
    .logo-icon {
      font-size: 2rem;
      color: var(--accent);
      filter: drop-shadow(0 0 8px var(--accent));
    }
    .logo-text {
      background: linear-gradient(135deg, #fff 0%, #d9c5ff 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      transition: color 0.2s;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: white;
    }
    .nav-cta {
      background: linear-gradient(135deg, var(--primary), var(--primary-glow));
      padding: 10px 22px;
      border-radius: 30px;
      color: white !important;
      font-weight: 600;
      box-shadow: 0 4px 14px rgba(108, 60, 224, 0.5);
      transition: var(--transition);
    }
    .nav-cta:hover {
      box-shadow: 0 0 22px var(--accent);
      transform: translateY(-1px);
    }

    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: white;
      font-size: 2rem;
      cursor: pointer;
    }

    /* 板块通用 */
    section {
      padding: 5rem 0;
      scroll-margin-top: 80px;
    }

    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      text-align: center;
      margin-bottom: 1rem;
      background: linear-gradient(to right, #fff, #d1bfff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .section-sub {
      text-align: center;
      color: var(--text-muted);
      max-width: 650px;
      margin: 0 auto 3rem;
      font-size: 1.15rem;
    }

    /* Hero */
    .hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      margin-top: 72px;
    }
    .hero::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 50%, rgba(10,10,20,0.5) 0%, #0A0A14 95%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 40px;
    }
    .hero-text {
      flex: 1 1 400px;
    }
    .hero h1 {
      font-size: 3.4rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 1.5rem;
    }
    .hero .highlight {
      background: linear-gradient(135deg, var(--accent), #6C3CE0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.25rem;
      color: #cfcfe0;
      margin-bottom: 2.2rem;
      max-width: 500px;
    }
    .btn-group {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #6C3CE0, #8B5CF6);
      border: none;
      color: white;
      font-weight: 600;
      padding: 14px 34px;
      border-radius: 40px;
      font-size: 1.1rem;
      cursor: pointer;
      text-decoration: none;
      box-shadow: 0 8px 22px rgba(108,60,224,0.5);
      transition: var(--transition);
    }
    .btn-primary:hover {
      box-shadow: 0 0 28px var(--accent);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent);
      color: var(--accent);
      padding: 14px 30px;
      border-radius: 40px;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: rgba(0,229,255,0.1);
      box-shadow: 0 0 18px rgba(0,229,255,0.5);
    }
    .hero-image {
      flex: 1 1 320px;
      text-align: center;
    }
    .hero-image img {
      max-width: 100%;
      border-radius: 28px;
      box-shadow: 0 20px 40px rgba(108,60,224,0.5);
    }

    /* 核心优势 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      transition: var(--transition);
      text-align: center;
    }
    .feature-card:hover {
      border-color: var(--accent);
      box-shadow: 0 0 28px rgba(0,229,255,0.25);
      transform: translateY(-6px);
    }
    .feature-icon {
      font-size: 2.8rem;
      color: var(--accent);
      margin-bottom: 1.2rem;
    }

    /* 流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }
    .step {
      flex: 1 1 160px;
      text-align: center;
      position: relative;
    }
    .step-number {
      width: 56px;
      height: 56px;
      background: linear-gradient(145deg, #6C3CE0, #8B5CF6);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1rem;
      font-weight: 700;
      font-size: 1.5rem;
      box-shadow: 0 0 18px var(--primary);
    }

    /* 数据 */
    .stats-band {
      background: rgba(26,26,46,0.7);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-lg);
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      padding: 2.5rem 1rem;
    }
    .stat h3 {
      font-size: 2.8rem;
      background: linear-gradient(to right, #00E5FF, #B280FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(2,1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #19192C;
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      gap: 16px;
      align-items: center;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(108,60,224,0.3);
      padding: 1.2rem 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 1.2rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #2E1065, #0A0A14);
      text-align: center;
      border-radius: 40px;
      margin: 2rem 0;
    }

    footer {
      background: #06060F;
      padding: 3rem 0;
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .features-grid { grid-template-columns: 1fr; }
      .hero h1 { font-size: 2.4rem; }
      .testimonial-grid { grid-template-columns: 1fr; }
    }