/* roulang page: index */
:root {
      --primary-purple: #7B2FF7;
      --primary-light: #9B4FFF;
      --accent-cyan: #00F0FF;
      --obsidian-black: #0A0E17;
      --deep-gray-bg: #1A1F2B;
      --light-gray-bg: #F4F5FA;
      --white: #ffffff;
      --text-light-body: #B0B8C5;
      --text-dark-body: #4A5568;
      --border-color: #2D3340;
      --shadow-card: 0 8px 30px rgba(123, 47, 247, 0.08);
      --shadow-card-hover: 0 18px 40px rgba(123, 47, 247, 0.18);
      --shadow-cyan-glow: 0 0 20px rgba(0, 240, 255, 0.5);
      --radius-card: 16px;
      --radius-button: 40px;
      --radius-pill: 40px;
      --transition-base: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
      --font-heading: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-body);
      background-color: var(--obsidian-black);
      color: var(--text-light-body);
      line-height: 1.75;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .brand-heading {
      font-family: var(--font-heading);
      font-weight: 700;
      letter-spacing: -0.3px;
      margin: 0;
    }

    h1 {
      font-size: clamp(2.8rem, 6vw, 4rem);
      line-height: 1.15;
      color: #fff;
    }

    h2 {
      font-size: clamp(2rem, 4vw, 2.75rem);
      line-height: 1.2;
      margin-bottom: 1.5rem;
      color: var(--obsidian-black);
    }

    h3 {
      font-size: 1.4rem;
      font-weight: 600;
      line-height: 1.4;
      color: var(--obsidian-black);
    }

    a {
      color: var(--accent-cyan);
      transition: var(--transition-base);
      text-decoration: none;
    }

    a:hover {
      color: var(--primary-light);
    }

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

    /* 容器 */
    .section-container {
      max-width: 1300px;
      margin: 0 auto;
      padding: 0 2rem;
    }

    .section-padding {
      padding: 5rem 0;
    }

    @media (max-width: 768px) {
      .section-padding {
        padding: 3.5rem 0;
      }
    }

    /* 导航 sticky */
    .k1-nav {
      background: rgba(10, 14, 23, 0.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(123, 47, 247, 0.15);
      position: sticky;
      top: 0;
      z-index: 50;
      padding: 0.8rem 0;
      transition: var(--transition-base);
    }

    .nav-logo {
      font-family: var(--font-heading);
      font-weight: 800;
      font-size: 1.8rem;
      background: linear-gradient(135deg, #7B2FF7 0%, #C55FFF 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 0.4rem;
      letter-spacing: -0.5px;
    }

    .nav-logo i {
      font-size: 1.9rem;
      background: linear-gradient(180deg, #00F0FF, #7B2FF7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .k1-nav .menu a {
      color: rgba(255, 255, 255, 0.8);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 0.4rem 0.8rem;
      position: relative;
      text-transform: uppercase;
      letter-spacing: 0.3px;
      transition: 0.25s;
    }

    .k1-nav .menu a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0.8rem;
      right: 0.8rem;
      height: 2px;
      background: var(--accent-cyan);
      transform: scaleX(0);
      transition: transform 0.2s ease;
    }

    .k1-nav .menu a:hover {
      color: var(--accent-cyan);
    }

    .k1-nav .menu a:hover::after {
      transform: scaleX(1);
    }

    .btn-nav-cta {
      background: var(--primary-purple);
      color: white !important;
      border-radius: var(--radius-pill);
      padding: 0.55rem 1.8rem !important;
      font-weight: 600;
      box-shadow: 0 4px 14px rgba(123, 47, 247, 0.4);
      margin-left: 0.8rem;
      text-transform: none !important;
    }

    .btn-nav-cta:hover {
      background: var(--primary-light);
      color: white !important;
      box-shadow: 0 8px 20px rgba(155, 79, 255, 0.6);
    }

    .mega-trigger {
      cursor: pointer;
    }

    .mega-panel {
      position: absolute;
      top: 100%;
      left: 0;
      width: 100%;
      background: rgba(20, 24, 35, 0.98);
      backdrop-filter: blur(25px);
      border-top: 2px solid var(--primary-purple);
      padding: 2rem 2.5rem;
      display: flex;
      gap: 3rem;
      opacity: 0;
      visibility: hidden;
      transform: translateY(10px);
      transition: 0.25s ease;
      z-index: 55;
      border-radius: 0 0 20px 20px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.7);
    }

    .mega-trigger:hover .mega-panel,
    .mega-trigger:focus-within .mega-panel {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    .mega-col h4 {
      color: var(--accent-cyan);
      margin-bottom: 1rem;
    }

    .mega-link {
      display: block;
      color: #ccc;
      padding: 0.3rem 0;
    }

    /* 移动导航 */
    .hamburger {
      color: white;
      font-size: 1.8rem;
    }

    @media (max-width: 768px) {
      .desktop-menu {
        display: none;
      }
    }

    /* Hero */
    #hero {
      background: var(--obsidian-black);
      position: relative;
      overflow: hidden;
      min-height: 85vh;
      display: flex;
      align-items: center;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
      align-items: center;
    }

    .hero-text .tag {
      background: rgba(0,240,255,0.1);
      color: var(--accent-cyan);
      padding: 0.4rem 1.2rem;
      border-radius: 30px;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 1.5rem;
      letter-spacing: 1px;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: #cbd5e0;
      margin: 1.2rem 0 2rem;
      line-height: 1.7;
    }

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

    .btn-primary {
      background: var(--primary-purple);
      color: white;
      border-radius: var(--radius-pill);
      padding: 0.9rem 2.5rem;
      font-weight: 700;
      border: none;
      transition: var(--transition-base);
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
    }

    .btn-primary:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(155,79,255,0.5);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-cyan);
      color: var(--accent-cyan);
      border-radius: var(--radius-pill);
      padding: 0.85rem 2.5rem;
      font-weight: 600;
      transition: var(--transition-base);
    }

    .btn-outline:hover {
      background: rgba(0,240,255,0.12);
      border-color: white;
      color: white;
    }

    .hero-visual {
      position: relative;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      min-height: 450px;
      box-shadow: 0 0 60px rgba(123,47,247,0.5);
      border: 1px solid rgba(123,47,247,0.2);
    }

    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .hero-visual {
        min-height: 280px;
        order: -1;
      }
    }

    /* 优势卡片 */
    .advantage-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem 1.8rem;
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
      border-top: 4px solid var(--accent-cyan);
    }

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

    /* 数据区 */
    .data-block {
      background: var(--obsidian-black);
    }

    .stat-number {
      font-size: 3.8rem;
      font-weight: 800;
      color: var(--accent-cyan);
      line-height: 1;
    }

    /* 服务卡片 */
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
    }

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

    .service-img {
      height: 220px;
      background-size: cover;
      position: relative;
    }

    /* 横向滚动 */
    .scroll-x {
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      padding: 0.8rem 0 2rem;
      scrollbar-width: thin;
    }

    .player-card {
      background: white;
      border-radius: 30px;
      padding: 1.5rem;
      min-width: 220px;
      text-align: center;
    }

    /* FAQ */
    .accordion-item {
      background: #1A1F2B;
      border-radius: 12px;
      margin-bottom: 0.8rem;
    }

    .accordion-title {
      color: white;
      font-weight: 600;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: radial-gradient(circle at 30% 30%, rgba(123,47,247,0.3), transparent 60%), var(--obsidian-black);
    }

    footer {
      background: #0A0E17;
    }

    .partner-logo img {
      filter: grayscale(100%) opacity(0.5);
      transition: 0.3s;
    }
    .partner-logo img:hover {
      filter: none;
      opacity: 1;
    }