/* roulang page: index */
:root {
      --milano-red: #C8102E;
      --milano-red-hover: #E01335;
      --neon-cyan: #00F0FF;
      --deep-obsidian: #0B0C10;
      --titanium-gray: #1F2024;
      --border-subtle: #2A2B30;
      --text-primary: #FFFFFF;
      --text-secondary: #AAAAAA;
      --text-muted: #888888;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --border-radius-card: 12px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.4);
      --shadow-neon: 0 8px 30px rgba(0,240,255,0.15);
      --transition-base: 0.25s ease;
      --section-gap: 120px;
    }

    * {
      box-sizing: border-box;
    }

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

    h1, h2, h3, h4 {
      font-weight: 700;
      letter-spacing: -0.2px;
    }

    h1 {
      font-size: 48px;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }

    h2 {
      font-size: 36px;
      line-height: 1.3;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
      line-height: 1.4;
    }

    h4 {
      font-size: 16px;
      font-weight: 600;
      text-transform: none;
    }

    p {
      font-size: 16px;
      font-weight: 400;
      line-height: 1.75;
      color: var(--text-secondary);
      margin-bottom: 1.5rem;
    }

    .micro-text {
      font-size: 14px;
      font-weight: 400;
      line-height: 1.6;
      color: var(--text-muted);
    }

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

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

    /* 自定义容器微调 */
    .container-custom {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    section {
      padding-top: var(--section-gap);
      padding-bottom: var(--section-gap);
    }

    @media (max-width: 768px) {
      h1 {
        font-size: 32px;
      }
      h2 {
        font-size: 26px;
      }
      section {
        padding-top: 80px;
        padding-bottom: 80px;
      }
      :root {
        --section-gap: 80px;
      }
    }

    /* 导航 */
    .navbar-custom {
      background: rgba(11, 12, 16, 0.75);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 12px 0;
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }
    .navbar-custom.scrolled {
      background: var(--deep-obsidian);
      box-shadow: 0 4px 20px rgba(0,0,0,0.6);
    }
    .logo-text {
      font-size: 22px;
      font-weight: 700;
      color: var(--milano-red);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
    }
    .logo-icon {
      margin-right: 8px;
      font-size: 26px;
      color: var(--neon-cyan);
      transform: rotate(45deg);
      display: inline-block;
    }
    .nav-link-custom {
      color: #CCCCCC !important;
      font-weight: 500;
      margin: 0 12px;
      padding: 8px 0 !important;
      position: relative;
    }
    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: #FFFFFF !important;
    }
    .nav-link-custom.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--neon-cyan);
    }
    .btn-ghost-nav {
      border: 1.5px solid #FFFFFF;
      color: #FFFFFF;
      background: transparent;
      border-radius: 50px;
      padding: 8px 22px;
      font-weight: 600;
      font-size: 15px;
      transition: var(--transition-base);
    }
    .btn-ghost-nav:hover {
      background: #FFFFFF;
      color: var(--deep-obsidian);
    }
    .navbar-toggler {
      border-color: rgba(255,255,255,0.3);
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(255, 255, 255, 0.7)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    /* 按钮系统 */
    .btn-primary-red {
      background: var(--milano-red);
      color: #FFFFFF;
      border-radius: 50px;
      padding: 14px 36px;
      font-weight: 600;
      border: none;
      transition: var(--transition-base);
    }
    .btn-primary-red:hover {
      background: var(--milano-red-hover);
      box-shadow: 0 0 20px rgba(200,16,46,0.5);
      color: #FFFFFF;
    }
    .btn-ghost {
      background: transparent;
      border: 1.5px solid #FFFFFF;
      color: #FFFFFF;
      border-radius: 50px;
      padding: 14px 36px;
      font-weight: 600;
      transition: var(--transition-base);
    }
    .btn-ghost:hover {
      background: #FFFFFF;
      color: var(--deep-obsidian);
    }

    /* 卡片 */
    .card-custom {
      background: var(--titanium-gray);
      border: 1px solid var(--border-subtle);
      border-radius: var(--border-radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
      height: 100%;
    }
    .card-custom:hover {
      border-color: var(--neon-cyan);
      box-shadow: var(--shadow-neon);
      transform: translateY(-4px);
    }
    .icon-neon {
      color: var(--neon-cyan);
      font-size: 40px;
      margin-bottom: 20px;
      display: inline-block;
    }
    .text-link-cyan {
      color: var(--neon-cyan);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      transition: var(--transition-base);
    }
    .text-link-cyan i {
      margin-left: 6px;
      transition: transform 0.2s;
    }
    .text-link-cyan:hover {
      color: #FFFFFF;
    }
    .text-link-cyan:hover i {
      transform: translateX(4px);
    }

    /* Hero区域 */
    .hero-section {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      background-color: var(--deep-obsidian);
    }
    .hero-overlay {
      position: absolute;
      top:0;left:0;width:100%;height:100%;
      background: linear-gradient(180deg, rgba(11,12,16,0.7) 0%, rgba(11,12,16,0.95) 95%);
      z-index: 1;
    }
    .hero-grid {
      position: absolute;
      top:0;left:0;width:100%;height:100%;
      background-image: linear-gradient(rgba(0,240,255,0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(0,240,255,0.08) 1px, transparent 1px);
      background-size: 40px 40px;
      z-index: 1;
      opacity: 0.25;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      text-align: left;
    }
    @media (max-width: 768px) {
      .hero-content {
        text-align: center;
      }
    }
    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 2;
      color: var(--neon-cyan);
      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);}
    }

    /* 不对称服务卡片 */
    .service-large-card {
      background: linear-gradient(135deg, rgba(200,16,46,0.15) 0%, rgba(31,32,36,0.9) 100%);
      border: 1px solid var(--border-subtle);
      border-radius: var(--border-radius-card);
      padding: 40px;
    }
    .service-small-card {
      background: var(--titanium-gray);
      border: 1px solid var(--border-subtle);
      border-radius: var(--border-radius-card);
      padding: 32px;
    }
    .stat-number {
      font-size: 56px;
      font-weight: 700;
      color: var(--neon-cyan);
      line-height: 1.1;
    }
    .testimonial-quote {
      position: relative;
      font-size: 20px;
      font-style: italic;
      line-height: 1.8;
      color: #DDD;
    }
    .testimonial-quote::before {
      content: "“";
      font-size: 120px;
      color: rgba(200,16,46,0.2);
      position: absolute;
      left: -30px;
      top: -50px;
      font-style: normal;
      line-height: 1;
    }
    .faq-accordion .accordion-button {
      background: var(--titanium-gray);
      color: #FFFFFF;
      font-weight: 600;
      border: 1px solid var(--border-subtle);
      border-radius: 8px !important;
      padding: 18px 24px;
      font-size: 18px;
    }
    .faq-accordion .accordion-button:not(.collapsed) {
      background: #25262B;
      color: var(--neon-cyan);
      box-shadow: none;
    }
    .faq-accordion .accordion-body {
      background: #1A1B1F;
      color: var(--text-secondary);
      border: 1px solid var(--border-subtle);
      border-top: none;
      border-radius: 0 0 8px 8px;
      padding: 20px 24px;
      font-size: 16px;
      line-height: 1.7;
    }
    .footer-link {
      color: #888;
      transition: var(--transition-base);
    }
    .footer-link:hover {
      color: var(--milano-red);
    }
    .divider-red {
      height: 2px;
      background: var(--milano-red);
      width: 80px;
      margin: 24px auto;
    }