/* roulang page: index */
:root {
      --mk-red: #E43D22;
      --mk-deep: #1A1A1A;
      --mk-gold: #F5A623;
      --mk-bg: #F9F9F9;
      --mk-white: #FFFFFF;
      --mk-gray: #666666;
      --mk-light-gray: #F2F2F2;
      --mk-border: #EEEEEE;
      --mk-shadow: 0 2px 16px rgba(0,0,0,0.06);
      --mk-hover-shadow: 0 8px 32px rgba(228,61,34,0.15);
      --mk-radius: 12px;
      --mk-radius-sm: 8px;
      --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-en: 'Inter', 'Poppins', sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-cn);
      font-size: 16px;
      line-height: 1.8;
      background-color: var(--mk-bg);
      color: #222;
      margin: 0;
      overflow-x: hidden;
    }
    h1, h2, h3, h4, .en-font {
      font-family: var(--font-cn);
    }
    .en-font, .counter-number {
      font-family: var(--font-en);
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1200px;
    }
    /* 导航栏 */
    .navbar-mk {
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 1px 4px rgba(0,0,0,0.05);
      padding: 12px 0;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 999;
    }
    .logo-text {
      font-size: 26px;
      font-weight: 700;
      color: var(--mk-deep);
      letter-spacing: 2px;
    }
    .logo-text span {
      color: var(--mk-red);
    }
    .search-box {
      background: var(--mk-light-gray);
      border-radius: 24px;
      padding: 8px 20px;
      display: flex;
      align-items: center;
      width: 40%;
      transition: all 0.2s ease;
      border: 2px solid transparent;
    }
    .search-box:focus-within {
      border-color: var(--mk-red);
      background: white;
    }
    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      width: 100%;
      font-size: 14px;
      color: #333;
    }
    .search-box input::placeholder {
      color: #999;
    }
    .nav-link-mk {
      font-weight: 600;
      color: #333;
      margin: 0 8px;
      transition: color 0.2s;
      font-size: 15px;
    }
    .nav-link-mk:hover {
      color: var(--mk-red);
    }
    .mobile-search-icon {
      display: none;
    }
    @media (max-width: 991px) {
      .search-box {
        width: 100%;
        margin: 10px 0;
        display: none;
      }
      .mobile-search-icon {
        display: block;
        font-size: 20px;
        color: #333;
      }
      .navbar-mk .container {
        flex-wrap: wrap;
      }
    }
    /* Hero */
    .hero-mk {
      background: linear-gradient(135deg, #1A1A1A 0%, #2D2D2D 100%);
      position: relative;
      overflow: hidden;
      padding: 160px 0 100px;
      margin-top: 70px;
    }
    .hero-mk::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: repeating-linear-gradient(45deg, rgba(255,255,255,0.02) 0px, rgba(255,255,255,0.02) 2px, transparent 2px, transparent 8px);
      pointer-events: none;
    }
    .hero-title {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
      color: white;
      letter-spacing: -0.5px;
    }
    .hero-sub {
      font-size: 18px;
      color: #ccc;
      margin: 24px 0 32px;
    }
    .btn-mk-primary {
      background: var(--mk-red);
      color: white;
      border-radius: 8px;
      padding: 14px 32px;
      font-weight: 600;
      border: none;
      transition: all 0.25s ease;
    }
    .btn-mk-primary:hover {
      background: #C8321B;
      box-shadow: 0 6px 20px rgba(228,61,34,0.4);
      color: white;
    }
    .btn-mk-outline {
      background: transparent;
      border: 2px solid var(--mk-red);
      color: var(--mk-red);
      border-radius: 8px;
      padding: 14px 32px;
      font-weight: 600;
      transition: all 0.25s ease;
    }
    .btn-mk-outline:hover {
      background: var(--mk-red);
      color: white;
    }
    .hero-img-placeholder {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 360px;
      border-radius: 16px;
      position: relative;
    }
    .color-block {
      position: absolute;
      bottom: -10px;
      right: -10px;
      width: 80px;
      height: 80px;
      background: var(--mk-red);
      border-radius: 12px;
      z-index: 0;
    }
    .scroll-down {
      position: absolute;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      color: white;
      font-size: 24px;
      animation: bounce 2s infinite;
    }
    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
      40% { transform: translateX(-50%) translateY(-10px); }
      60% { transform: translateX(-50%) translateY(-5px); }
    }
    /* 区块标题 */
    .section-title {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--mk-deep);
    }
    .section-sub {
      color: #666;
      font-size: 16px;
      margin-bottom: 48px;
    }
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      .hero-title { font-size: 32px; }
      .section-title { font-size: 28px; }
      section { padding: 60px 0; }
    }
    /* 卡片 */
    .card-mk {
      background: white;
      border-radius: 12px;
      padding: 32px;
      border: 1px solid var(--mk-border);
      box-shadow: var(--mk-shadow);
      transition: all 0.25s ease;
      height: 100%;
    }
    .card-mk:hover {
      box-shadow: var(--mk-hover-shadow);
      transform: translateY(-4px);
    }
    .icon-circle {
      width: 64px;
      height: 64px;
      background: #FFF0ED;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      transition: 0.2s;
    }
    .card-mk:hover .icon-circle {
      background: var(--mk-red);
    }
    .icon-circle i {
      font-size: 28px;
      color: var(--mk-red);
      transition: 0.2s;
    }
    .card-mk:hover .icon-circle i {
      color: white;
    }
    /* 数据区 */
    .data-section {
      background: var(--mk-deep);
    }
    .counter-number {
      font-size: 48px;
      font-weight: 800;
      color: var(--mk-gold);
    }
    /* 服务卡片 */
    .service-card img {
      height: 220px;
      object-fit: cover;
      border-radius: 12px 12px 0 0;
    }
    .service-card .card-body {
      padding: 24px;
    }
    /* 品牌墙 */
    .brand-logo {
      filter: grayscale(100%);
      opacity: 0.7;
      transition: 0.2s;
      height: 48px;
    }
    .brand-logo:hover {
      filter: grayscale(0%);
      opacity: 1;
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background: white;
      color: var(--mk-deep);
      box-shadow: none;
      border-left: 3px solid var(--mk-red);
      border-radius: 8px !important;
    }
    .accordion-item {
      border: 1px solid var(--mk-border);
      border-radius: 8px;
      margin-bottom: 12px;
    }
    .accordion-button {
      font-weight: 600;
      font-size: 16px;
    }
    /* CTA底部 */
    .cta-bottom {
      background: var(--mk-deep);
    }
    .btn-pulse {
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(228,61,34,0.6); }
      70% { box-shadow: 0 0 0 15px rgba(228,61,34,0); }
      100% { box-shadow: 0 0 0 0 rgba(228,61,34,0); }
    }
    footer {
      background: #1A1A1A;
      color: #bbb;
    }
    footer a {
      color: #bbb;
      transition: 0.2s;
    }
    footer a:hover {
      color: white;
    }
    .social-icon {
      display: inline-flex;
      width: 36px;
      height: 36px;
      border: 1px solid #666;
      border-radius: 50%;
      align-items: center;
      justify-content: center;
      margin-right: 8px;
      transition: 0.2s;
    }
    .social-icon:hover {
      background: var(--mk-red);
      border-color: var(--mk-red);
      color: white;
    }