/* roulang page: index */
:root {
      --primary-dark: #0A0E27;
      --accent-cyan: #00F0FF;
      --accent-pink: #FF3366;
      --bg-light: #F5F7FA;
      --text-dark: #1e1e2f;
      --text-soft: #5e5e7a;
      --white: #ffffff;
      --card-glass: rgba(255, 255, 255, 0.85);
      --border-glow: rgba(0, 240, 255, 0.25);
      --shadow-card: 0 8px 32px rgba(0, 240, 255, 0.08);
      --shadow-hover: 0 12px 40px rgba(0, 240, 255, 0.2);
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-pill: 30px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Inter', system-ui, sans-serif;
      --font-number: 'Inter', system-ui, sans-serif;
      --spacing-section: 100px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-heading);
      background: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.7;
      overflow-x: hidden;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航吸顶资讯门户风格 */
    .brand-bar {
      background: rgba(10, 14, 39, 0.98);
      backdrop-filter: blur(20px);
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      position: sticky;
      top: 0;
      z-index: 100;
      transition: all 0.3s ease;
    }

    .brand-bar .logo {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--white);
      text-decoration: none;
      position: relative;
      display: inline-block;
      letter-spacing: -0.5px;
    }

    .logo::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--accent-cyan);
      border-radius: 2px;
    }

    .tag-hot {
      background: rgba(255, 51, 102, 0.15);
      color: var(--accent-pink);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      white-space: nowrap;
      margin-left: 10px;
    }

    .search-icon {
      color: var(--white);
      font-size: 1.2rem;
      margin-left: 16px;
      cursor: pointer;
      transition: color 0.2s;
    }

    .search-icon:hover {
      color: var(--accent-cyan);
    }

    .channel-row {
      background: rgba(10, 14, 39, 0.9);
      backdrop-filter: blur(18px);
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-anchor {
      color: rgba(255, 255, 255, 0.8);
      margin: 0 1rem;
      font-weight: 600;
      font-size: 0.95rem;
      text-decoration: none;
      position: relative;
      padding: 6px 0;
      transition: 0.2s;
    }

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

    .nav-anchor.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--accent-cyan);
      border-radius: 2px;
    }

    .hamburger {
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }

    @media (max-width: 1024px) {
      .channel-row .nav-anchor {
        margin: 0.3rem 0;
        display: block;
        text-align: center;
      }

      .mobile-menu {
        background: rgba(10, 14, 39, 0.98);
        backdrop-filter: blur(24px);
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        padding: 1rem;
        border-top: 1px solid var(--accent-cyan);
      }
    }

    /* Hero */
    #hero {
      height: 100vh;
      background: radial-gradient(circle at 30% 30%, #1a1f3a, #0A0E27);
      position: relative;
      display: flex;
      align-items: center;
      overflow: hidden;
    }

    .hero-grid-bg {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" viewBox="0 0 40 40"><circle cx="1" cy="1" r="1" fill="rgba(0,240,255,0.12)"/></svg>');
      opacity: 0.5;
    }

    .floating-particle {
      position: absolute;
      width: 6px;
      height: 6px;
      background: var(--accent-cyan);
      border-radius: 50%;
      filter: blur(1px);
      animation: float 6s infinite alternate ease-in-out;
    }

    @keyframes float {
      0% { transform: translateY(0px) scale(1); opacity: 0.4; }
      100% { transform: translateY(-40px) scale(1.5); opacity: 0.8; }
    }

    .hero-title {
      font-size: 3.5rem;
      font-weight: 800;
      color: white;
      line-height: 1.2;
      text-shadow: 0 4px 20px rgba(0,0,0,0.6);
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--accent-cyan), #7ff7ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-sub {
      font-size: 1.25rem;
      color: rgba(255,255,255,0.85);
      margin: 1.5rem 0 2rem;
    }

    .btn-primary {
      background: var(--accent-cyan);
      color: #0A0E27;
      padding: 14px 32px;
      border-radius: 30px;
      font-weight: 700;
      border: none;
      display: inline-block;
      transition: 0.25s;
      text-decoration: none;
    }

    .btn-primary:hover {
      background: var(--accent-pink);
      color: white;
      box-shadow: 0 0 22px rgba(255,51,102,0.7);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-cyan);
      color: var(--accent-cyan);
      padding: 12px 30px;
      border-radius: 30px;
      font-weight: 600;
      transition: 0.25s;
      text-decoration: none;
      margin-left: 16px;
    }

    .btn-outline:hover {
      background: rgba(0,240,255,0.1);
    }

    .live-counter {
      position: absolute;
      bottom: 30px;
      right: 40px;
      background: rgba(0,0,0,0.5);
      backdrop-filter: blur(10px);
      padding: 8px 18px;
      border-radius: 40px;
      color: white;
      font-weight: 700;
    }

    .counter-num {
      color: var(--accent-pink);
      font-size: 1.8rem;
      font-weight: 800;
      margin: 0 4px;
    }

    /* 通用板块 */
    section {
      padding: var(--spacing-section) 0;
    }

    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 0.8rem;
      color: var(--primary-dark);
    }

    .glass-card {
      background: var(--card-glass);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-glow);
      box-shadow: var(--shadow-card);
      padding: 28px;
      transition: all 0.3s ease;
    }

    .glass-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .service-card.middle-highlight {
      transform: scale(1.02);
      border-color: var(--accent-cyan);
      box-shadow: 0 0 28px rgba(0,240,255,0.3);
    }

    .dark-card {
      background: rgba(10,14,39,0.75);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.1);
      color: white;
    }

    .advantage-number {
      font-family: var(--font-number);
      font-size: 2.8rem;
      font-weight: 800;
      background: linear-gradient(180deg, var(--accent-cyan), #a0f0ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .case-tag {
      background: rgba(255,51,102,0.1);
      color: var(--accent-pink);
      padding: 2px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    .accordion-item {
      background: white;
      border-radius: 14px;
      margin-bottom: 12px;
      overflow: hidden;
      border-left: 4px solid var(--accent-cyan);
    }

    .accordion-item.active {
      border-left-color: var(--accent-pink);
    }

    .bg-cta {
      background: linear-gradient(135deg, #0A0E27, #1e2a4a);
      position: relative;
    }

    @media (max-width: 640px) {
      .hero-title { font-size: 2.2rem; }
      .btn-outline { margin-left: 0; margin-top: 12px; }
      .service-card.middle-highlight { transform: none; }
    }