/* roulang page: index */
/* 设计变量与全局重置 */
    :root {
      --primary: #00E5FF;
      --primary-dark: #0088CC;
      --secondary-gold: #FFD700;
      --bg-deep: #0A1128;
      --bg-card: #1A2A4A;
      --text-white: #FFFFFF;
      --text-light-steel: #B0C4DE;
      --text-muted: #7B8FA1;
      --glass-bg: rgba(26, 42, 74, 0.6);
      --glass-border: rgba(0, 229, 255, 0.15);
      --glass-blur: blur(12px);
      --radius-lg: 16px;
      --radius-pill: 50px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.5);
      --font-head: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Rajdhani', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Inter', sans-serif;
      --transition: all 0.3s ease;
    }

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

    body {
      font-family: var(--font-body);
      background-color: var(--bg-deep);
      color: var(--text-light-steel);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .stats-number {
      font-family: var(--font-head);
      color: var(--text-white);
      font-weight: 600;
      letter-spacing: -0.2px;
    }

    h1 { font-size: 48px; line-height: 1.2; }
    h2 { font-size: 36px; line-height: 1.3; }
    h3 { font-size: 24px; }
    .text-muted { color: var(--text-muted); }
    .text-gold { color: var(--secondary-gold); }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: #fff;
      text-shadow: 0 0 8px rgba(0,229,255,0.3);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container-main {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    section {
      padding: 100px 0;
    }

    @media (max-width: 640px) {
      section { padding: 60px 0; }
      h1 { font-size: 32px; }
      h2 { font-size: 24px; }
    }

    /* 导航 - 极简高端玻璃导航 */
    .milenav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 999;
      background: rgba(10, 17, 40, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      height: 72px;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .logo {
      font-family: var(--font-head);
      font-weight: 700;
      font-size: 24px;
      color: #fff;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i {
      color: var(--primary);
      font-size: 28px;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
    }
    .nav-links a {
      color: var(--text-light-steel);
      font-size: 14px;
      font-weight: 500;
      letter-spacing: 1px;
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-links a.active {
      color: #fff;
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 50%;
      transform: translateX(-50%);
      width: 60%;
      height: 2px;
      background: var(--primary);
      border-radius: 4px;
      box-shadow: 0 0 12px var(--primary);
    }
    .hamburger {
      display: none;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 24px;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(10,17,40,0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 30px 20px;
        gap: 24px;
      }
      .nav-links.active-mob {
        display: flex;
      }
      .hamburger {
        display: block;
      }
    }

    /* Hero 粒子背景与排版 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      position: relative;
      background: radial-gradient(circle at 30% 30%, #0A1128, #000000);
      overflow: hidden;
    }
    .hero-particles {
      position: absolute;
      top:0; left:0; width:100%; height:100%;
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 800px;
      margin: 0 auto;
    }
    .hero h1 {
      font-size: 56px;
      margin-bottom: 24px;
      background: linear-gradient(to right, #fff, #00E5FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero .sub {
      font-size: 20px;
      color: var(--text-light-steel);
      margin-bottom: 40px;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #00E5FF, #0088CC);
      border: none;
      color: #fff;
      font-weight: 600;
      padding: 14px 36px;
      border-radius: 50px;
      box-shadow: 0 0 20px rgba(0,229,255,0.5);
      transition: all 0.25s;
      cursor: pointer;
      display: inline-block;
      letter-spacing: 0.5px;
    }
    .btn-primary:hover {
      box-shadow: 0 0 30px rgba(0,229,255,0.8);
      transform: scale(1.03);
      color: #fff;
    }
    .btn-outline {
      background: transparent;
      border: 1px solid #00E5FF;
      color: #00E5FF;
      font-weight: 600;
      padding: 14px 36px;
      border-radius: 50px;
      transition: all 0.25s;
      cursor: pointer;
    }
    .btn-outline:hover {
      background: rgba(0,229,255,0.1);
      color: #fff;
      border-color: #fff;
    }
    .scroll-hint {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: var(--text-muted);
      font-size: 28px;
      animation: bounce 2s infinite;
    }
    @keyframes bounce {
      0%,100%{ transform:translateX(-50%) translateY(0); }
      50%{ transform:translateX(-50%) translateY(10px); }
    }

    /* 通用卡片玻璃拟态 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }
    .glass-card:hover {
      transform: translateY(-6px);
      border-color: var(--primary);
      box-shadow: 0 12px 40px rgba(0,229,255,0.25);
    }

    /* 痛点卡片 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(2,1fr);
      gap: 30px;
    }
    .pain-item {
      display: flex;
      align-items: center;
      gap: 20px;
      background: rgba(26,42,74,0.5);
      backdrop-filter: blur(8px);
      border-radius: 16px;
      padding: 24px;
      border: 1px solid rgba(255,255,255,0.05);
    }
    .pain-icon {
      font-size: 36px;
      color: var(--secondary-gold);
    }
    .pain-number {
      font-size: 32px;
      font-weight: 700;
      color: var(--secondary-gold);
      margin-right: 10px;
    }

    /* 解决方案卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 30px;
    }
    .service-card img {
      border-radius: 16px 16px 0 0;
      height: 200px;
      object-fit: cover;
      width: 100%;
    }
    .service-body {
      padding: 24px;
    }
    .feature-list {
      list-style: none;
      margin-top: 16px;
    }
    .feature-list li {
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .feature-list i {
      color: var(--primary);
    }

    /* 成果 KPI */
    .kpi-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 40px;
    }
    .kpi-item {
      text-align: center;
    }
    .kpi-number {
      font-size: 56px;
      font-weight: 700;
      color: var(--primary);
      font-family: 'Rajdhani', sans-serif;
    }

    /* 证言轮播 */
    .testimonial-slide {
      max-width: 700px;
      margin: 0 auto;
      text-align: center;
      padding: 30px;
    }
    .testimonial-avatar {
      width: 64px;
      height: 64px;
      border-radius: 50%;
      border: 2px solid var(--primary);
      margin: 0 auto 20px;
    }
    .quote-icon {
      font-size: 60px;
      color: rgba(255,255,255,0.1);
    }

    /* FAQ 手风琴 */
    .accordion-item {
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .accordion-title {
      font-size: 18px;
      font-weight: 500;
      padding: 16px 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      background: rgba(0,229,255,0.03);
      padding: 0 16px;
      border-radius: 8px;
    }
    .accordion-content.open {
      max-height: 200px;
      padding: 16px;
    }

    /* 联系表单 */
    .form-glass input, .form-glass textarea {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      color: #fff;
      border-radius: 8px;
      padding: 12px;
      width: 100%;
      margin-bottom: 16px;
      transition: 0.2s;
    }
    .form-glass input:focus, .form-glass textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 12px rgba(0,229,255,0.4);
      outline: none;
    }

    footer {
      background: #060D1A;
      padding: 60px 0 20px;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
    }
    @media (max-width: 768px) {
      .pain-grid, .service-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 520px) {
      .footer-grid { grid-template-columns: 1fr; }
    }