/* roulang page: index */
:root {
      --primary-purple: #7B2FF7;
      --accent-orange: #FF6A3D;
      --bg-dark: #0F0E17;
      --bg-card: rgba(26, 25, 38, 0.8);
      --bg-light: #F4F3FA;
      --text-primary: #D1D0E0;
      --text-dark: #1A1926;
      --text-white: #ffffff;
      --border-light: rgba(123, 47, 247, 0.2);
      --radius-xl: 20px;
      --radius-pill: 50px;
      --shadow-card: 0 8px 32px rgba(123, 47, 247, 0.15);
      --shadow-hover: 0 16px 48px rgba(123, 47, 247, 0.35);
      --transition: all 0.25s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-dark);
      color: var(--text-primary);
      line-height: 1.75;
      display: flex;
      min-height: 100vh;
      overflow-x: hidden;
    }

    /* 左侧竖向导航 (桌面端) */
    .side-nav {
      position: fixed;
      left: 0;
      top: 0;
      width: 240px;
      height: 100vh;
      background-color: var(--bg-dark);
      border-right: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      flex-direction: column;
      padding: 2rem 1.5rem;
      z-index: 100;
      transition: transform 0.3s ease;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      margin-bottom: 3rem;
      height: 60px;
    }

    .logo-icon {
      font-size: 2rem;
      color: var(--primary-purple);
    }

    .logo-text {
      font-size: 1.5rem;
      font-weight: 800;
      letter-spacing: 1px;
      background: linear-gradient(135deg, var(--primary-purple), #b794f4);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
      flex: 1;
    }

    .nav-links li a {
      text-decoration: none;
      color: var(--text-primary);
      font-weight: 500;
      font-size: 1.1rem;
      padding: 0.5rem 0;
      display: flex;
      align-items: center;
      gap: 0.8rem;
      transition: var(--transition);
      border-left: 3px solid transparent;
      padding-left: 0.5rem;
    }

    .nav-links li a i {
      width: 20px;
      text-align: center;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--accent-orange);
      border-left-color: var(--primary-purple);
      background: linear-gradient(90deg, rgba(123,47,247,0.1), transparent);
    }

    /* 移动端顶部导航 */
    .mobile-nav {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 56px;
      background-color: var(--bg-dark);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      align-items: center;
      justify-content: space-between;
      padding: 0 1.2rem;
      z-index: 110;
    }

    .mobile-logo {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: white;
      font-weight: 700;
      font-size: 1.2rem;
    }

    .hamburger {
      background: none;
      border: none;
      color: var(--text-primary);
      font-size: 1.6rem;
      cursor: pointer;
      width: 44px;
      height: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 56px;
      left: 0;
      width: 100%;
      background: rgba(15, 14, 23, 0.97);
      backdrop-filter: blur(10px);
      flex-direction: column;
      padding: 1.5rem;
      z-index: 105;
      gap: 1rem;
    }

    .mobile-menu a {
      color: var(--text-primary);
      text-decoration: none;
      font-size: 1.2rem;
      padding: 0.8rem;
      border-radius: 12px;
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .mobile-menu a:hover {
      background: rgba(123,47,247,0.15);
      color: var(--accent-orange);
    }

    /* 主内容区 */
    .main-content {
      margin-left: 240px;
      width: calc(100% - 240px);
      max-width: 1400px;
      flex: 1;
    }

    section {
      padding: 5rem 3rem;
    }

    h2 {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 2.5rem;
      color: white;
      letter-spacing: -0.5px;
    }

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

    /* Hero双栏 */
    .hero-section {
      background: linear-gradient(135deg, #0F0E17 0%, #2D1B4E 60%, #7B2FF7 100%);
      position: relative;
      overflow: hidden;
      min-height: 90vh;
      display: flex;
      align-items: center;
    }

    .hero-section::before {
      content: "";
      position: absolute;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(123,47,247,0.4) 0%, transparent 70%);
      top: -100px;
      right: -50px;
      animation: floatPulse 6s infinite alternate;
    }

    @keyframes floatPulse {
      0% { transform: translate(0,0); opacity: 0.5; }
      100% { transform: translate(-30px, 40px); opacity: 0.8; }
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.9fr;
      gap: 3rem;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .hero-left h1 {
      font-size: 3.2rem;
      font-weight: 900;
      color: white;
      line-height: 1.3;
      margin-bottom: 1.5rem;
    }

    .hero-left .subtitle {
      font-size: 1.2rem;
      color: #e0d7ff;
      margin-bottom: 2.5rem;
    }

    .btn-group {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--accent-orange);
      color: white;
      padding: 0.9rem 2.2rem;
      border-radius: var(--radius-pill);
      font-weight: 700;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      transition: var(--transition);
      box-shadow: 0 6px 18px rgba(255,106,61,0.3);
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      background: #FF8155;
      box-shadow: 0 0 20px rgba(255,106,61,0.6);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-purple);
      color: var(--primary-purple);
      padding: 0.9rem 2.2rem;
      border-radius: var(--radius-pill);
      font-weight: 700;
      text-decoration: none;
      transition: var(--transition);
    }

    .btn-outline:hover {
      background: var(--primary-purple);
      color: white;
    }

    .hero-right {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }

    .data-badge {
      background: rgba(26, 25, 38, 0.7);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-xl);
      padding: 1.5rem;
      display: flex;
      align-items: center;
      gap: 1rem;
      border: 1px solid rgba(123,47,247,0.25);
      animation: badgePulse 2s infinite alternate;
    }

    @keyframes badgePulse {
      0% { box-shadow: 0 0 5px rgba(123,47,247,0.4); }
      100% { box-shadow: 0 0 15px rgba(123,47,247,0.7); }
    }

    .badge-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--accent-orange);
    }

    /* 亮点网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .feature-card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-xl);
      padding: 2rem;
      border: 1px solid rgba(123,47,247,0.2);
      transition: var(--transition);
    }

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

    .feature-icon {
      font-size: 2rem;
      color: var(--primary-purple);
      margin-bottom: 1rem;
    }

    .feature-card h3 {
      color: white;
      font-size: 1.5rem;
      margin-bottom: 0.8rem;
    }

    /* 案例瀑布 */
    .case-waterfall {
      columns: 3 280px;
      column-gap: 2rem;
    }

    .case-card {
      break-inside: avoid;
      background: var(--bg-card);
      border-radius: var(--radius-xl);
      margin-bottom: 2rem;
      overflow: hidden;
      border: 1px solid rgba(123,47,247,0.2);
    }

    .case-img {
      height: 180px;
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .case-overlay {
      position: absolute;
      inset: 0;
      background: rgba(123,47,247,0.7);
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      transition: 0.3s;
      color: white;
      font-weight: bold;
    }

    .case-card:hover .case-overlay {
      opacity: 1;
    }

    /* 方案对比 */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }

    .compare-col {
      background: white;
      border-radius: var(--radius-xl);
      padding: 2rem;
      color: var(--text-dark);
    }

    .compare-col.jbo {
      border: 3px solid var(--primary-purple);
      background: #ffffff;
      box-shadow: 0 10px 25px rgba(123,47,247,0.2);
    }

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

    .faq-item {
      background: var(--bg-card);
      border-radius: var(--radius-xl);
      margin-bottom: 1rem;
      border: 1px solid rgba(123,47,247,0.2);
    }

    .faq-question {
      padding: 1.5rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }

    /* CTA横幅 */
    .cta-banner {
      background: linear-gradient(90deg, #7B2FF7, #FF6A3D);
      text-align: center;
      border-radius: 40px;
      margin: 2rem;
      padding: 4rem 2rem;
    }

    footer {
      background: #0A0A0F;
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
      padding: 3rem;
    }

    @media (max-width: 768px) {
      .side-nav { display: none; }
      .mobile-nav { display: flex; }
      .main-content { margin-left: 0; width: 100%; }
      .hero-grid { grid-template-columns: 1fr; }
      .features-grid { grid-template-columns: 1fr 1fr; }
      .compare-wrapper { grid-template-columns: 1fr; }
      footer { grid-template-columns: 1fr 1fr; }
    }