/* roulang page: index */
:root {
      --primary-purple: #8A2BE2;
      --deep-purple: #6A0DAD;
      --accent-cyan: #00E5FF;
      --cta-orange: #FF4500;
      --cta-orange-light: #FF6D00;
      --bg-dark: #0B0C10;
      --bg-darker: #0A0A0F;
      --bg-card: rgba(255, 255, 255, 0.05);
      --bg-light: #F5F5F7;
      --text-white: #FFFFFF;
      --text-light-gray: #CCCCCC;
      --text-gray: #B0B0B0;
      --text-dark: #1E1E2A;
      --border-glow: rgba(138, 43, 226, 0.4);
      --border-cyan: rgba(0, 229, 255, 0.5);
      --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.6);
      --shadow-glow-purple: 0 0 20px rgba(138, 43, 226, 0.5);
      --shadow-glow-cyan: 0 0 15px rgba(0, 229, 255, 0.4);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-btn: 6px;
      --transition: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
      --max-width: 1200px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
      background-color: var(--bg-dark);
      color: var(--text-light-gray);
      line-height: 1.6;
      scroll-behavior: smooth;
      overflow-x: hidden;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3, h4 {
      font-weight: 600;
      line-height: 1.25;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      font-weight: 600;
      transition: var(--transition);
      border: none;
      background: transparent;
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(11, 12, 16, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(138, 43, 226, 0.25);
      z-index: 1000;
      height: 70px;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--accent-cyan), var(--primary-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 2px;
      display: flex;
      align-items: center;
    }
    .logo-icon {
      font-size: 2rem;
      margin-right: 6px;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
    }
    .nav-links a {
      color: var(--text-light-gray);
      font-weight: 500;
      font-size: 1rem;
      position: relative;
      padding: 8px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-cyan);
      transition: width var(--transition);
    }
    .nav-links a:hover {
      color: var(--accent-cyan);
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .nav-links a.active {
      color: var(--accent-cyan);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 28px;
      height: 3px;
      background: var(--accent-cyan);
      border-radius: 3px;
      transition: var(--transition);
    }

    /* 移动端导航 */
    @media (max-width: 768px) {
      .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.8rem;
        transform: translateX(-100%);
        transition: transform 0.35s ease;
        border-bottom: 1px solid var(--border-glow);
      }
      .nav-links.active {
        transform: translateX(0);
      }
      .hamburger {
        display: flex;
      }
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 2.25rem;
      color: var(--text-white);
      margin-bottom: 16px;
      position: relative;
    }
    .section-title span {
      color: var(--accent-cyan);
    }
    .section-subtitle {
      color: var(--text-gray);
      font-size: 1.1rem;
      margin-bottom: 48px;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-attachment: fixed;
      position: relative;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(11,12,16,0.85) 0%, rgba(106,13,173,0.5) 100%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      color: white;
    }
    .hero h1 {
      font-size: 3.5rem;
      font-weight: 700;
      margin-bottom: 20px;
      line-height: 1.2;
      text-shadow: 0 0 25px rgba(0,229,255,0.3);
    }
    .hero .highlight {
      color: var(--accent-cyan);
    }
    .hero p {
      font-size: 1.25rem;
      color: var(--text-light-gray);
      margin-bottom: 32px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--cta-orange);
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-size: 1.1rem;
      box-shadow: 0 0 15px rgba(255, 69, 0, 0.6);
    }
    .btn-primary:hover {
      background: var(--cta-orange-light);
      box-shadow: 0 0 25px rgba(255, 69, 0, 0.9);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 1.5px solid var(--accent-cyan);
      color: var(--accent-cyan);
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-size: 1.1rem;
    }
    .btn-outline:hover {
      background: rgba(0, 229, 255, 0.1);
      box-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
    }

    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .pain-card {
      background: var(--bg-card);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(138, 43, 226, 0.3);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      transition: var(--transition);
    }
    .pain-card:hover {
      border-color: var(--accent-cyan);
      box-shadow: var(--shadow-glow-cyan);
      transform: translateY(-6px);
    }

    /* 解决方案 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .solution-card {
      background: rgba(26, 26, 46, 0.7);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(0, 229, 255, 0.2);
      border-radius: var(--radius-md);
      padding: 38px 28px;
      text-align: center;
      transition: var(--transition);
    }
    .solution-card:hover {
      border-color: var(--primary-purple);
      box-shadow: 0 0 30px rgba(138, 43, 226, 0.5);
      transform: translateY(-8px);
    }

    /* 数据区 */
    .data-bg {
      background: #0F0F1A;
    }
    .stats-grid {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 40px;
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-size: 3.5rem;
      font-weight: 700;
      color: var(--cta-orange);
      text-shadow: 0 0 20px #FF4500;
    }

    /* 证言 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .testimonial-card {
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(138,43,226,0.35);
      border-radius: var(--radius-md);
      padding: 32px;
      display: flex;
      gap: 20px;
    }

    /* FAQ */
    .faq-section {
      background: var(--bg-light);
      color: var(--text-dark);
    }
    .faq-item {
      background: white;
      border: 1px solid #ddd;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      padding: 18px 24px;
      transition: 0.2s;
    }
    .faq-item:hover {
      border-color: var(--primary-purple);
      box-shadow: 0 4px 12px rgba(138,43,226,0.15);
    }

    /* CTA */
    .cta-block {
      background: linear-gradient(135deg, #1A1A2E, #0B0C10);
    }

    /* 页脚 */
    .footer {
      background: #09090C;
      color: #B0B0B0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    @media (max-width: 1024px) {
      .pain-grid, .solution-grid { grid-template-columns: repeat(2, 1fr); }
      .testimonial-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .hero h1 { font-size: 2.5rem; }
      .pain-grid, .solution-grid { grid-template-columns: 1fr; }
      .stats-grid { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr; }
    }