/* roulang page: index */
:root {
      --track-ash: #2C2C2C;
      --deep-charcoal: #1A1A1A;
      --neon-green: #C8FF00;
      --cement-gray: #E0E0E0;
      --warning-orange: #FF5F1F;
      --light-bg: #F7F7F7;
      --card-white: #FFFFFF;
      --text-dark: #1A1A1A;
      --text-body: #333333;
      --text-muted: #6c757d;
      --border-light: #E0E0E0;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
      --border-radius-card: 12px;
      --border-radius-btn: 30px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--light-bg);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      padding-top: 68px;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航 */
    .navbar-custom {
      background: rgba(28, 28, 28, 0.95);
      backdrop-filter: blur(12px);
      height: 68px;
      display: flex;
      align-items: center;
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 1000;
      box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .brand-logo {
      font-size: 22px;
      font-weight: 800;
      color: var(--neon-green);
      letter-spacing: -0.5px;
      display: flex;
      align-items: baseline;
      gap: 6px;
    }
    .brand-domain {
      font-size: 12px;
      color: #aaa;
      font-weight: 400;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-links a {
      color: #ccc;
      font-weight: 500;
      font-size: 15px;
      transition: color 0.2s, border-bottom 0.2s;
      padding-bottom: 6px;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--neon-green);
      border-bottom-color: var(--neon-green);
    }
    .btn-nav-cta {
      background: var(--warning-orange);
      color: white;
      border-radius: 30px;
      padding: 8px 22px;
      font-weight: 600;
      font-size: 14px;
      transition: background 0.25s;
      border: none;
    }
    .btn-nav-cta:hover {
      background: #FF7F3F;
      color: white;
    }
    .navbar-toggler {
      border: none;
      color: white;
      font-size: 24px;
    }
    .offcanvas {
      background: #1c1c1c;
    }
    .offcanvas .nav-links-mobile a {
      color: #ccc;
      padding: 12px 20px;
      display: block;
      font-weight: 500;
    }
    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, #2C2C2C 0%, #1A1A1A 100%);
      padding: 80px 0 60px;
      color: white;
      position: relative;
      overflow: hidden;
    }
    .hero-clip-bg {
      position: absolute;
      right: 0;
      top: 0;
      height: 100%;
      width: 50%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      clip-path: polygon(8% 0, 100% 0, 100% 100%, 0% 100%);
      opacity: 0.9;
    }
    .hero-overlay-stripe {
      position: absolute;
      right: 0;
      top: 20%;
      width: 45%;
      height: 120px;
      background: linear-gradient(90deg, rgba(200,255,0,0.25) 0%, rgba(200,255,0,0.05) 100%);
      clip-path: polygon(6% 0, 100% 0, 100% 100%, 0% 100%);
      display: flex;
      align-items: center;
      justify-content: flex-end;
      padding-right: 60px;
    }
    .hero-overlay-stripe span {
      font-size: 48px;
      font-weight: 800;
      color: white;
      letter-spacing: 4px;
    }
    .hero-title {
      font-size: 52px;
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.2;
      margin-bottom: 18px;
    }
    .hero-sub {
      font-size: 18px;
      color: #B0B0B0;
      margin-bottom: 32px;
    }
    .btn-outline-neon {
      border: 2px solid var(--neon-green);
      color: var(--neon-green);
      background: transparent;
      border-radius: 30px;
      padding: 10px 28px;
      font-weight: 600;
      transition: all 0.25s;
      margin-right: 16px;
    }
    .btn-outline-neon:hover {
      background: var(--neon-green);
      color: #1A1A1A;
    }
    .btn-solid-orange {
      background: var(--warning-orange);
      color: white;
      border: none;
      border-radius: 30px;
      padding: 10px 28px;
      font-weight: 600;
      transition: background 0.25s;
    }
    .btn-solid-orange:hover {
      background: #FF7F3F;
      color: white;
    }
    .hero-stats {
      display: flex;
      gap: 32px;
      margin-top: 40px;
      flex-wrap: wrap;
    }
    .hero-stat-item .stat-number {
      font-size: 28px;
      font-weight: 800;
      color: var(--neon-green);
    }
    .hero-stat-item .stat-label {
      font-size: 14px;
      color: #ccc;
    }
    /* 亮点网格 */
    .section-title {
      font-size: 38px;
      font-weight: 700;
      margin-bottom: 48px;
      text-align: center;
      color: var(--text-dark);
    }
    .highlight-card {
      background: transparent;
      text-align: center;
      padding: 30px 16px;
      border-bottom: 4px solid var(--neon-green);
      transition: 0.2s;
    }
    .highlight-number {
      font-size: 52px;
      font-weight: 800;
      color: var(--neon-green);
      line-height: 1.2;
    }
    .highlight-desc {
      font-size: 15px;
      color: #555;
      margin-top: 8px;
    }
    /* 服务卡片 */
    .service-card {
      background: var(--card-white);
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .service-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .service-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .service-img::after {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(0,0,0,0.35);
    }
    .service-body {
      padding: 24px 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .service-body h4 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .service-body p {
      font-size: 14px;
      color: #555;
      flex: 1;
    }
    .service-link {
      color: var(--neon-green);
      font-weight: 600;
      margin-top: 16px;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    /* 对比表 */
    .table-custom {
      border-radius: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .table-custom thead th {
      background: #2C2C2C;
      color: var(--neon-green);
      font-weight: 700;
      font-size: 16px;
      padding: 16px;
    }
    .table-custom tbody td {
      padding: 14px 16px;
      vertical-align: middle;
    }
    .table-custom tbody tr:nth-child(even) {
      background: #F0F0F0;
    }
    .btn-outline-table {
      border: 2px solid var(--neon-green);
      color: #2C2C2C;
      border-radius: 30px;
      padding: 6px 18px;
      font-weight: 600;
    }
    .btn-outline-table:hover {
      background: var(--neon-green);
    }
    /* 案例卡片 */
    .case-card {
      background: white;
      border-radius: 12px;
      padding: 16px;
      display: flex;
      gap: 18px;
      align-items: center;
      box-shadow: var(--shadow-sm);
      transition: 0.2s;
    }
    .case-card:hover {
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      width: 120px;
      height: 120px;
      border-radius: 8px;
      object-fit: cover;
      transition: transform 0.25s;
    }
    .case-card:hover .case-img {
      transform: scale(1.05);
    }
    .case-tag {
      background: var(--neon-green);
      color: #1A1A1A;
      font-size: 12px;
      font-weight: 700;
      padding: 2px 10px;
      border-radius: 20px;
      display: inline-block;
      margin-top: 8px;
    }
    /* FAQ */
    .accordion-item {
      border: 1px solid #E0E0E0;
      border-radius: 8px;
      margin-bottom: 12px;
      background: white;
    }
    .accordion-button {
      font-weight: 600;
      font-size: 16px;
      background: white;
      box-shadow: none;
      border-left: 4px solid var(--neon-green);
      border-radius: 8px;
    }
    .accordion-button:not(.collapsed) {
      color: var(--neon-green);
      background: #FAFAFA;
    }
    /* CTA */
    .cta-section {
      background: #1A1A1A;
      position: relative;
      padding: 70px 0;
      text-align: center;
    }
    .cta-decor {
      position: absolute;
      top: 0;
      right: 0;
      width: 180px;
      height: 180px;
      background: var(--neon-green);
      clip-path: polygon(100% 0, 0 0, 100% 100%);
      opacity: 0.4;
    }
    .btn-cta-large {
      background: var(--warning-orange);
      color: white;
      font-size: 18px;
      padding: 16px 48px;
      border-radius: 40px;
      font-weight: 700;
      transition: all 0.3s;
      border: none;
    }
    .btn-cta-large:hover {
      transform: translateY(-6px);
      box-shadow: 0 12px 24px rgba(255,95,31,0.4);
    }
    /* 页脚 */
    .footer {
      background: #111;
      color: #ccc;
      padding: 50px 0 20px;
    }
    .footer a {
      color: #aaa;
    }
    .footer a:hover {
      color: var(--neon-green);
    }
    .footer-input {
      background: #222;
      border: 1px solid #444;
      color: white;
      border-radius: 6px;
      padding: 8px 12px;
    }
    .btn-subscribe {
      background: var(--neon-green);
      color: #000;
      font-weight: 700;
      border: none;
      border-radius: 6px;
      padding: 8px 16px;
    }
    @media (max-width: 768px) {
      .hero-clip-bg {
        width: 100%;
        clip-path: none;
        opacity: 0.25;
      }
      .hero-title {
        font-size: 34px;
      }
      .section-title {
        font-size: 30px;
      }
    }