/* roulang page: index */
:root {
      --primary-green: #00E676;
      --dark-bg: #1A0A2E;
      --darker-bg: #0F0518;
      --card-bg: rgba(20, 10, 40, 0.7);
      --accent-purple: #B44CFF;
      --text-white: #FFFFFF;
      --text-light: #D1C4E9;
      --border-glow: rgba(180, 76, 255, 0.2);
      --shadow-green: 0 0 24px rgba(0, 230, 118, 0.5);
      --shadow-purple: 0 8px 32px rgba(180, 76, 255, 0.15);
      --radius-card: 12px;
      --radius-btn: 8px;
      --font-sans: 'Inter', 'SF Pro Text', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --transition-fast: 0.2s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background: radial-gradient(circle at 30% 10%, #2D1B4E 0%, #0F0518 80%);
      color: var(--text-light);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    h1, h2, h3, h4 {
      font-weight: 700;
      letter-spacing: 0.02em;
      color: var(--text-white);
    }

    h1 {
      font-weight: 900;
      font-size: 3.4rem;
      line-height: 1.2;
      margin-bottom: 1.5rem;
    }

    h2 {
      font-size: 2.6rem;
      margin-bottom: 2rem;
      position: relative;
      display: inline-block;
    }

    h2::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -10px;
      width: 60%;
      height: 3px;
      background: var(--primary-green);
      box-shadow: 0 0 16px var(--primary-green);
    }

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

    /* 导航栏 */
    .top-bar {
      background: rgba(10, 5, 25, 0.96);
      backdrop-filter: blur(20px);
      padding: 0.8rem 0;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 999;
      border-bottom: 1px solid rgba(180,76,255,0.25);
      box-shadow: 0 4px 24px rgba(0,0,0,0.6);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-green);
      text-decoration: none;
      letter-spacing: 1px;
    }

    .logo i {
      font-size: 2.2rem;
      color: var(--primary-green);
      filter: drop-shadow(0 0 6px #00E676);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2.2rem;
      list-style: none;
      margin: 0;
    }

    .nav-links a {
      color: var(--text-white);
      text-decoration: none;
      font-weight: 600;
      font-size: 1.05rem;
      padding: 6px 0;
      position: relative;
      transition: color var(--transition-fast);
    }

    .nav-links a:hover {
      color: var(--primary-green);
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -4px;
      width: 0;
      height: 3px;
      background: var(--accent-purple);
      box-shadow: 0 0 12px var(--accent-purple);
      transition: width 0.25s ease;
    }

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

    .nav-cta {
      background: var(--accent-purple);
      color: white !important;
      padding: 10px 22px !important;
      border-radius: 30px;
      font-weight: 700;
      box-shadow: 0 0 14px rgba(180,76,255,0.6);
      transition: all 0.25s;
      border: none;
    }

    .nav-cta:hover {
      background: #c56bff;
      box-shadow: 0 0 22px #B44CFF;
    }

    .hamburger {
      display: none;
      font-size: 2rem;
      color: white;
      cursor: pointer;
    }

    @media (max-width: 1024px) {
      .nav-links {
        gap: 1.2rem;
      }
    }

    @media (max-width: 768px) {
      .hamburger {
        display: block;
      }
      .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 320px;
        height: 100vh;
        background: rgba(10,5,25,0.98);
        backdrop-filter: blur(30px);
        flex-direction: column;
        justify-content: center;
        gap: 2.5rem;
        transition: right 0.35s ease;
        border-left: 2px solid var(--accent-purple);
        box-shadow: -8px 0 30px rgba(0,0,0,0.8);
      }
      .nav-links.active {
        right: 0;
      }
      .nav-links a {
        font-size: 1.4rem;
      }
    }

    /* Hero */
    .hero {
      padding: 160px 0 100px;
      display: flex;
      align-items: center;
      gap: 4rem;
      flex-wrap: wrap;
    }

    .hero-left {
      flex: 1 1 55%;
    }

    .hero-right {
      flex: 1 1 40%;
      position: relative;
      min-height: 360px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,230,118,0.2);
      border: 1px solid rgba(180,76,255,0.3);
    }

    .particle-overlay {
      position: absolute;
      top:0; left:0; width:100%; height:100%;
      background: radial-gradient(circle at 20% 30%, rgba(0,230,118,0.2) 0%, transparent 60%);
      mix-blend-mode: screen;
    }

    .hero h1 {
      font-size: 3.8rem;
      background: linear-gradient(to right, #fff, #D1C4E9);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero .subtitle {
      font-size: 1.5rem;
      color: #D1C4E9;
      margin-bottom: 2.2rem;
    }

    .btn-group {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
      align-items: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, #00E676, #00C853);
      color: #0A0415;
      font-weight: 800;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      text-decoration: none;
      box-shadow: 0 0 22px #00E676;
      transition: 0.2s;
      border: none;
      font-size: 1.1rem;
      letter-spacing: 0.5px;
    }

    .btn-primary:hover {
      box-shadow: 0 0 34px #00E676, 0 10px 24px rgba(0,230,118,0.5);
      transform: translateY(-2px);
      color: #000;
    }

    .btn-secondary {
      background: transparent;
      border: 2px solid var(--accent-purple);
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      transition: 0.2s;
      text-decoration: none;
    }

    .btn-secondary:hover {
      background: rgba(180,76,255,0.25);
      border-color: #d58bff;
    }

    /* 板块通用 */
    .section {
      padding: 90px 0;
    }

    /* 亮点网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      transition: all 0.25s;
    }

    .feature-card:hover {
      border-color: var(--accent-purple);
      box-shadow: var(--shadow-purple);
      transform: translateY(-6px);
    }

    .feature-card i {
      font-size: 2.8rem;
      color: var(--primary-green);
      margin-bottom: 18px;
    }

    /* 服务卡片 */
    .services-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 18px;
      scrollbar-width: thin;
    }

    .service-card {
      flex: 0 0 300px;
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-card);
      border: 1px solid var(--border-glow);
      overflow: hidden;
      transition: 0.2s;
    }

    .service-card:hover {
      border-color: var(--accent-purple);
      box-shadow: 0 12px 40px rgba(0,230,118,0.2);
    }

    .service-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }

    /* 案例瀑布流 */
    .cases-grid {
      columns: 3 280px;
      column-gap: 24px;
    }

    .case-item {
      break-inside: avoid;
      margin-bottom: 24px;
      background: rgba(20,10,40,0.8);
      border-radius: var(--radius-card);
      padding: 18px;
      border: 1px solid var(--border-glow);
    }

    .big-number {
      font-size: 3rem;
      font-weight: 800;
      color: var(--primary-green);
    }

    /* 对比条 */
    .compare-row {
      display: flex;
      gap: 24px;
      justify-content: center;
    }

    .plan {
      background: rgba(20,10,40,0.7);
      backdrop-filter: blur(10px);
      border-radius: 16px;
      padding: 32px;
      flex: 1;
      border: 1px solid var(--border-glow);
    }

    .plan.featured {
      border: 2px solid var(--accent-purple);
      box-shadow: 0 0 28px rgba(180,76,255,0.4);
    }

    .progress-bar {
      height: 8px;
      background: #2a1a3a;
      border-radius: 10px;
      margin: 12px 0;
    }

    .progress-fill {
      height: 100%;
      background: var(--primary-green);
      box-shadow: 0 0 12px #00E676;
      border-radius: 10px;
    }

    /* FAQ */
    .accordion {
      background: transparent;
    }

    .accordion-item {
      background: rgba(25,12,45,0.8);
      margin-bottom: 12px;
      border-radius: 10px;
    }

    .accordion-title {
      color: white;
      font-weight: 600;
      border-left: 5px solid var(--primary-green);
      padding-left: 18px;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(120deg, #1A0A2E 0%, #2D1B4E 100%);
      position: relative;
      overflow: hidden;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }

    @media (max-width: 1024px) {
      .hero {
        flex-direction: column;
      }
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 640px) {
      .features-grid, .compare-row {
        grid-template-columns: 1fr;
      }
      .compare-row {
        flex-direction: column;
      }
      .cases-grid {
        columns: 1;
      }
    }