/* roulang page: index */
:root {
      --primary-cyan: #00F0FF;
      --accent-red: #FF004D;
      --bg-deep: #0A0E17;
      --surface-dark: #131A2B;
      --text-cold: #E8ECF1;
      --text-muted: #8892A4;
      --border-glow: rgba(0, 240, 255, 0.15);
      --shadow-glow: 0 8px 32px rgba(0, 240, 255, 0.08);
      --gradient-cta: linear-gradient(135deg, #00F0FF 0%, #7B2FFF 100%);
      --border-radius-card: 12px;
      --border-radius-btn: 4px;
      --font-heading: "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-data: "Orbitron", "Courier New", monospace;
      --backdrop-blur: blur(20px);
      --transition-base: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      background-color: var(--bg-deep);
      color: var(--text-cold);
      font-family: var(--font-heading);
      font-weight: 400;
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }

    /* 自定义容器微调 */
    .container-custom {
      max-width: 1320px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 导航 */
    .navbar-custom {
      background: rgba(10, 14, 23, 0.85);
      backdrop-filter: var(--backdrop-blur);
      -webkit-backdrop-filter: var(--backdrop-blur);
      border-bottom: 1px solid rgba(0, 240, 255, 0.25);
      padding: 0.75rem 0;
      transition: var(--transition-base);
    }

    .navbar-brand {
      font-family: var(--font-heading);
      font-weight: 800;
      font-size: 1.6rem;
      letter-spacing: 1px;
      color: var(--primary-cyan) !important;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .navbar-brand i {
      font-size: 1.8rem;
      color: var(--primary-cyan);
    }
    .nav-link {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-muted) !important;
      padding: 0.5rem 1rem !important;
      margin: 0 0.2rem;
      transition: var(--transition-base);
      position: relative;
    }
    .nav-link:hover {
      color: var(--primary-cyan) !important;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--primary-cyan);
      transition: width 0.2s ease;
    }
    .nav-link:hover::after {
      width: 70%;
    }

    /* 搜索框与按钮 */
    .search-box {
      background: transparent;
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: 20px;
      padding: 0.4rem 1rem;
      color: white;
      width: 160px;
      transition: var(--transition-base);
    }
    .search-box:focus {
      outline: none;
      border-color: var(--primary-cyan);
      box-shadow: 0 0 8px rgba(0,240,255,0.4);
      background: rgba(19,26,43,0.6);
    }
    .btn-ghost {
      background: transparent;
      border: 1px solid var(--primary-cyan);
      color: var(--primary-cyan);
      border-radius: 20px;
      padding: 0.4rem 1.4rem;
      font-weight: 500;
      transition: var(--transition-base);
    }
    .btn-ghost:hover {
      background: rgba(0,240,255,0.1);
      border-color: #fff;
      color: #fff;
    }
    .btn-cta-red {
      background: var(--accent-red);
      border: none;
      color: white;
      font-weight: 700;
      border-radius: 20px;
      padding: 0.5rem 1.8rem;
      animation: pulse-red 2s infinite;
      transition: var(--transition-base);
      letter-spacing: 0.5px;
    }
    .btn-cta-red:hover {
      background: #ff1a5c;
      box-shadow: 0 0 20px rgba(255,0,77,0.6);
      transform: translateY(-1px);
    }
    @keyframes pulse-red {
      0% { box-shadow: 0 0 0 0 rgba(255,0,77,0.6); }
      70% { box-shadow: 0 0 0 8px rgba(255,0,77,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,0,77,0); }
    }

    /* Hero区域 */
    #hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      background: linear-gradient(135deg, #0A0E17 0%, #0f1523 100%);
      overflow: hidden;
    }
    .hero-bg {
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.35;
      z-index: 0;
    }
    .scanlines {
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background: repeating-linear-gradient(0deg, rgba(0,240,255,0.03) 0px, rgba(0,0,0,0.2) 2px, transparent 3px);
      z-index: 1;
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-title {
      font-size: 3.5rem;
      font-weight: 900;
      letter-spacing: 2px;
      color: white;
      text-shadow: 0 0 20px rgba(0,240,255,0.7);
    }
    .dynamic-text {
      color: var(--primary-cyan);
      font-weight: 700;
      font-size: 1.5rem;
      min-height: 2.5rem;
      border-right: 2px solid var(--primary-cyan);
      padding-right: 5px;
      display: inline-block;
    }
    .floating-card {
      background: rgba(19,26,43,0.8);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(0,240,255,0.3);
      border-radius: 16px;
      padding: 1.2rem;
      color: white;
      box-shadow: 0 0 30px rgba(0,240,255,0.2);
    }
    .win-rate {
      font-family: var(--font-data);
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--primary-cyan);
    }

    /* 按钮主样式 */
    .btn-primary-cyan {
      background: var(--primary-cyan);
      border: none;
      color: #0A0E17;
      font-weight: 700;
      border-radius: var(--border-radius-btn);
      padding: 0.8rem 2.2rem;
      transition: var(--transition-base);
      letter-spacing: 0.8px;
    }
    .btn-primary-cyan:hover {
      background: var(--gradient-cta);
      color: white;
      box-shadow: 0 4px 20px rgba(0,240,255,0.5);
      transform: translateY(-2px);
    }
    .btn-outline-cyan {
      background: transparent;
      border: 1px solid var(--primary-cyan);
      color: var(--primary-cyan);
      border-radius: var(--border-radius-btn);
      padding: 0.8rem 2.2rem;
      font-weight: 500;
    }
    .btn-outline-cyan:hover {
      background: rgba(0,240,255,0.1);
      color: white;
    }

    /* 优势卡片斜切风格 */
    .advantage-card {
      background: var(--surface-dark);
      border: 1px solid var(--border-glow);
      border-radius: 0 12px 12px 0;
      clip-path: polygon(0% 0%, 92% 0%, 100% 8%, 100% 100%, 8% 100%, 0% 92%);
      padding: 2rem 1.8rem;
      transition: var(--transition-base);
      box-shadow: var(--shadow-glow);
      height: 100%;
    }
    .advantage-card:hover {
      border-color: var(--primary-cyan);
      box-shadow: 0 0 35px rgba(0,240,255,0.3);
      transform: translateY(-4px);
    }
    .advantage-icon {
      font-size: 2.5rem;
      color: var(--primary-cyan);
      margin-bottom: 1rem;
    }

    /* 战绩滚动 */
    .stat-number {
      font-family: var(--font-data);
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--primary-cyan);
    }

    /* 案例卡片 */
    .case-card {
      background: var(--surface-dark);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      overflow: hidden;
      transition: var(--transition-base);
    }
    .case-card:hover {
      border-color: var(--primary-cyan);
      box-shadow: 0 0 30px rgba(0,240,255,0.25);
    }
    .case-img {
      transition: transform 0.4s ease;
      height: 220px;
      object-fit: cover;
      width: 100%;
    }
    .case-card:hover .case-img {
      transform: scale(1.05);
    }

    /* FAQ手风琴 */
    .accordion-button {
      background-color: var(--surface-dark);
      color: var(--text-cold);
      font-weight: 600;
      border: 1px solid var(--border-glow);
    }
    .accordion-button:not(.collapsed) {
      background-color: #1A2235;
      color: var(--primary-cyan);
      box-shadow: 0 0 0 2px rgba(0,240,255,0.4);
    }
    .accordion-button::before {
      content: "// ";
      color: var(--primary-cyan);
      font-weight: 700;
    }
    .accordion-body {
      background: #1A2235;
      color: var(--text-cold);
      border-left: 4px solid var(--primary-cyan);
    }

    footer a {
      color: var(--text-muted);
      text-decoration: none;
    }
    footer a:hover {
      color: var(--primary-cyan);
    }
    .social-icon {
      width: 44px;
      height: 44px;
      background: var(--surface-dark);
      clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: 0.3s;
      font-size: 1.4rem;
      color: var(--text-muted);
    }
    .social-icon:hover {
      background: var(--primary-cyan);
      color: #0A0E17;
    }

    @media (max-width: 768px) {
      .hero-title { font-size: 2.4rem; }
      .advantage-card { clip-path: none; border-radius: 12px; }
    }