/* roulang page: index */
:root {
      --primary: #E94057;
      --primary-glow: rgba(233, 64, 87, 0.65);
      --accent-cyan: #00E5FF;
      --accent-gold: #FFB800;
      --bg-dark: #0B0C10;
      --bg-card: #1A1D24;
      --bg-light-section: #16191f;
      --text-primary: #FFFFFF;
      --text-secondary: #B0B8C1;
      --border-dim: rgba(0, 229, 255, 0.15);
      --border-glow: rgba(0, 229, 255, 0.6);
      --radius-card: 14px;
      --radius-btn: 10px;
      --shadow-card: 0 6px 18px rgba(0, 0, 0, 0.5);
      --shadow-hover: 0 16px 32px rgba(233, 64, 87, 0.3);
      --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --transition: 0.25s ease;
      --container-max: 1280px;
      --section-gap: 110px;
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-primary);
      font-family: var(--font-sans);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 32px;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(11, 12, 16, 0.88);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      z-index: 999;
      border-bottom: 1px solid rgba(0, 229, 255, 0.12);
      padding: 12px 0;
      transition: var(--transition);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 32px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 6px;
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: -0.3px;
      color: #fff;
    }

    .logo .highlight {
      color: var(--primary);
      text-shadow: 0 0 12px var(--primary-glow);
    }

    .online-dot {
      width: 10px;
      height: 10px;
      background: #00E5FF;
      border-radius: 50%;
      display: inline-block;
      margin-left: 6px;
      box-shadow: 0 0 12px #00E5FF;
      animation: pulse-dot 1.4s infinite;
    }

    @keyframes pulse-dot {
      0% { opacity: 0.7; transform: scale(1); }
      50% { opacity: 1; transform: scale(1.3); }
      100% { opacity: 0.7; transform: scale(1); }
    }

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

    .nav-menu a {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 1rem;
      transition: var(--transition);
      position: relative;
      padding-bottom: 4px;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--accent-cyan);
    }

    .nav-menu a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-cyan);
      box-shadow: 0 0 8px var(--accent-cyan);
    }

    .btn-nav-cta {
      background: linear-gradient(135deg, #E94057, #FF4D6A);
      color: white;
      padding: 10px 22px;
      border-radius: 30px;
      font-weight: 600;
      font-size: 0.9rem;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(233, 64, 87, 0.4);
      white-space: nowrap;
    }

    .btn-nav-cta:hover {
      background: linear-gradient(135deg, #ff5a75, #ff2d4b);
      box-shadow: 0 6px 18px rgba(233, 64, 87, 0.7);
      transform: translateY(-2px);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }

    .hamburger span {
      width: 26px;
      height: 2.5px;
      background: white;
      border-radius: 2px;
      transition: var(--transition);
    }

    /* 首屏 */
    .hero {
      background: radial-gradient(circle at 30% 30%, rgba(0, 229, 255, 0.08) 0%, transparent 60%),
                  url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      padding: 120px 0 80px;
      border-bottom: 1px solid rgba(233, 64, 87, 0.2);
    }

    .hero-grid {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 3rem;
    }

    .hero-content {
      flex: 1 1 500px;
    }

    .hero h1 {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.6px;
      margin-bottom: 1.5rem;
      text-shadow: 0 0 24px rgba(233, 64, 87, 0.6);
    }

    .hero h1 .cyan-glow {
      color: var(--accent-cyan);
      text-shadow: 0 0 20px #00E5FF;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 2.2rem;
      max-width: 550px;
    }

    .hero-buttons {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #E94057, #FFB800);
      color: white;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1rem;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 8px 18px rgba(233, 64, 87, 0.45);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #ff5f75, #ffaa00);
      box-shadow: 0 12px 26px rgba(233, 64, 87, 0.7);
      transform: translateY(-3px);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--accent-cyan);
      color: var(--accent-cyan);
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
      cursor: pointer;
      background: rgba(0, 229, 255, 0.03);
    }

    .btn-outline:hover {
      background: rgba(0, 229, 255, 0.12);
      box-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
    }

    .live-panel {
      flex: 1 1 340px;
      background: rgba(26, 29, 36, 0.8);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-dim);
      border-radius: 20px;
      padding: 1.8rem;
      box-shadow: var(--shadow-card);
    }

    .live-badge {
      color: var(--accent-cyan);
      font-family: var(--font-mono);
      font-size: 0.8rem;
      text-transform: uppercase;
      letter-spacing: 2px;
      margin-bottom: 1rem;
    }

    .stat-row {
      display: flex;
      justify-content: space-between;
      margin: 1rem 0;
    }

    .stat-value {
      font-family: var(--font-mono);
      font-size: 1.8rem;
      color: var(--accent-cyan);
      text-shadow: 0 0 10px #00E5FF;
    }

    .progress-bg {
      background: #2a2e38;
      height: 6px;
      border-radius: 10px;
      margin: 12px 0;
      overflow: hidden;
    }

    .progress-fill {
      width: 78%;
      height: 100%;
      background: linear-gradient(90deg, #E94057, #FFB800);
      border-radius: 10px;
    }

    /* section 通用 */
    section {
      padding: var(--section-gap) 0;
    }

    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 0;
      width: 70px;
      height: 4px;
      background: linear-gradient(90deg, #E94057, #FFB800);
    }

    .text-center .section-title::after {
      left: 50%;
      transform: translateX(-50%);
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      margin-top: 3rem;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-card);
      padding: 2rem;
      transition: var(--transition);
    }

    .service-card:hover {
      border-color: var(--accent-cyan);
      box-shadow: var(--shadow-hover);
      transform: translateY(-5px);
    }

    .card-icon {
      font-size: 2.2rem;
      margin-bottom: 1.2rem;
    }

    .tag-group {
      display: flex;
      gap: 8px;
      margin-top: 1rem;
    }

    .tag {
      background: rgba(0, 229, 255, 0.1);
      color: var(--accent-cyan);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.75rem;
    }

    .advantage-bar {
      background: #2a2e38;
      height: 8px;
      border-radius: 8px;
      margin: 1rem 0;
    }

    .cases-scroll {
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      padding-bottom: 1rem;
    }

    .faq-item {
      border-bottom: 1px solid var(--border-dim);
      padding: 1rem 0;
    }

    .faq-question {
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }

    footer {
      background: #0a0b0e;
      padding: 3rem 0 1.5rem;
      color: var(--text-secondary);
    }

    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2,1fr); }
      .hero h1 { font-size: 2.8rem; }
    }

    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .grid-3 { grid-template-columns: 1fr; }
      .hero h1 { font-size: 2.4rem; }
      .container { padding: 0 20px; }
    }