/* roulang page: index */
:root {
      --primary-purple: #7B2FBE;
      --neon-cyan: #00F0B5;
      --deep-black: #0B0C10;
      --light-white: #F4F4F9;
      --accent-pink: #FF007F;
      --text-light: #B0B0C0;
      --text-dark: #333333;
      --border-light: #E0E0F0;
      --card-shadow: 0 8px 30px rgba(0,0,0,0.08);
      --glow-shadow: 0 0 20px rgba(123,47,190,0.3);
      --border-radius-card: 16px;
      --border-radius-btn: 30px;
      --border-radius-sm: 12px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition-smooth: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--deep-black);
      color: var(--text-light);
      margin: 0;
      line-height: 1.6;
      scroll-behavior: smooth;
    }

    /* 浮动导航 Dock */
    .navbar-dock {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 95%;
      background: rgba(11, 12, 16, 0.85);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(123, 47, 190, 0.4);
      border-radius: 50px;
      padding: 8px 24px;
      z-index: 1050;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 8px 20px rgba(0,0,0,0.6);
      transition: var(--transition-smooth);
    }

    .navbar-dock.scrolled {
      background: rgba(11, 12, 16, 0.95);
      border-bottom: 2px solid var(--neon-cyan);
    }

    .logo-text {
      font-weight: 700;
      font-size: 1.6rem;
      background: linear-gradient(135deg, #7B2FBE 0%, #c471ed 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
      margin-right: 20px;
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 20px;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      color: #ddd;
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition-smooth);
      white-space: nowrap;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--neon-cyan);
      text-shadow: 0 0 8px rgba(0,240,181,0.5);
    }

    .btn-nav-cta {
      background: var(--neon-cyan);
      color: var(--deep-black);
      border-radius: 30px;
      padding: 8px 18px;
      font-weight: 600;
      font-size: 0.9rem;
      border: none;
      transition: var(--transition-smooth);
      margin-left: 10px;
    }

    .btn-nav-cta:hover {
      background: #00d49c;
      box-shadow: 0 0 15px var(--neon-cyan);
      color: #000;
    }

    /* 移动端导航隐藏，使用offcanvas图标 */
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .navbar-dock {
        padding: 8px 20px;
      }
      .mobile-menu-icon {
        display: block !important;
        color: white;
        font-size: 1.8rem;
        cursor: pointer;
      }
    }

    .mobile-menu-icon {
      display: none;
    }

    /* 区块通用 */
    section {
      padding: 80px 0;
      position: relative;
      overflow: hidden;
    }

    .bg-dark-section {
      background-color: var(--deep-black);
    }

    .bg-light-section {
      background-color: var(--light-white);
    }

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

    h2 {
      font-size: 2.2rem;
      font-weight: 600;
      margin-bottom: 40px;
      position: relative;
      display: inline-block;
    }

    .h2-dark {
      color: var(--deep-black);
    }

    .h2-light {
      color: white;
    }

    .h2-underline::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 0;
      width: 60px;
      height: 3px;
      background: linear-gradient(to right, var(--neon-cyan), var(--primary-purple));
    }

    .text-center .h2-underline::after {
      left: 50%;
      transform: translateX(-50%);
    }

    /* Hero */
    #hero {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, #1a0f2e, var(--deep-black) 80%);
      position: relative;
    }

    .hero-bg-img {
      position: absolute;
      right: 0;
      top: 0;
      width: 45%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.35;
      mask-image: linear-gradient(to left, black 40%, transparent 95%);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
    }

    .hero-left-line {
      border-left: 4px solid var(--neon-cyan);
      padding-left: 25px;
    }

    h1 {
      font-size: 3.2rem;
      font-weight: 700;
      color: white;
      letter-spacing: 2px;
      margin-bottom: 20px;
    }

    .btn-primary-custom {
      background: var(--primary-purple);
      color: white;
      border-radius: 30px;
      padding: 12px 32px;
      font-weight: 600;
      border: none;
      transition: 0.3s;
      text-decoration: none;
      display: inline-block;
    }

    .btn-primary-custom:hover {
      background: #5A1F9E;
      box-shadow: 0 0 12px var(--neon-cyan);
      color: white;
    }

    .btn-outline-neon {
      background: transparent;
      border: 2px solid var(--neon-cyan);
      color: var(--neon-cyan);
      border-radius: 30px;
      padding: 12px 32px;
      font-weight: 600;
      transition: 0.3s;
      text-decoration: none;
    }

    .btn-outline-neon:hover {
      background: var(--neon-cyan);
      color: var(--deep-black);
    }

    /* 服务卡片 */
    .service-card {
      background: white;
      border-radius: 16px;
      padding: 24px;
      display: flex;
      align-items: flex-start;
      gap: 20px;
      box-shadow: var(--card-shadow);
      transition: 0.3s;
      border-left: 4px solid transparent;
    }

    .service-card:hover {
      border-left: 4px solid var(--primary-purple);
      transform: translateY(-4px);
      box-shadow: 0 15px 35px rgba(0,0,0,0.12);
    }

    .service-icon {
      font-size: 2.2rem;
      color: var(--neon-cyan);
      width: 50px;
      text-align: center;
    }

    /* 数据块 */
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--neon-cyan);
      text-shadow: 0 0 10px rgba(0,240,181,0.5);
    }

    /* 案例卡片 */
    .case-image-card {
      border-radius: 16px;
      overflow: hidden;
      position: relative;
      height: 280px;
    }

    .case-image-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: 0.4s;
    }

    .case-image-card:hover img {
      transform: scale(1.05);
    }

    .case-info-card {
      background: white;
      border-radius: 16px;
      padding: 24px;
      box-shadow: var(--card-shadow);
      border: 1px solid transparent;
      transition: 0.3s;
    }

    .case-info-card:hover {
      border-color: var(--primary-purple);
    }

    /* 步骤线 */
    .step-line {
      position: relative;
    }

    .step-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent-pink);
    }

    /* FAQ */
    .accordion-button {
      font-weight: 600;
      color: var(--deep-black);
      background: white;
      border-radius: 12px !important;
    }

    .accordion-button:not(.collapsed) {
      background: white;
      color: var(--primary-purple);
    }

    .accordion-item {
      border: 1px solid var(--border-light);
      border-radius: 12px;
      margin-bottom: 12px;
    }

    /* CTA */
    .btn-pink-cta {
      background: var(--accent-pink);
      color: white;
      border-radius: 50px;
      padding: 16px 40px;
      font-weight: 700;
      font-size: 1.3rem;
      animation: pulse 2s infinite;
      border: none;
      text-decoration: none;
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(255,0,127,0.6); }
      70% { box-shadow: 0 0 0 15px rgba(255,0,127,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,0,127,0); }
    }

    footer a {
      color: #aaa;
      text-decoration: none;
    }

    footer a:hover {
      color: var(--neon-cyan);
    }

    @media (max-width: 768px) {
      h1 { font-size: 2.2rem; }
      section { padding: 60px 0; }
    }