/* roulang page: index */
:root {
      --primary-blue: #0A6EFF;
      --accent-orange: #FF5E13;
      --bg-light: #F7F9FC;
      --card-white: #FFFFFF;
      --text-dark: #1E293B;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 24px rgba(10,110,255,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 40px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-mono: "SF Mono", "Menlo", monospace;
      --transition-base: 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.6;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    a {
      text-decoration: none;
      color: inherit;
    }
    
    h1, h2, h3, p {
      margin: 0;
    }
    
    /* 浮动导航 Dock */
    #main-nav {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 32px);
      max-width: 720px;
      background: rgba(255,255,255,0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: var(--radius-pill);
      box-shadow: 0 4px 20px rgba(0,0,0,0.06);
      padding: 8px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 99;
      transition: background 0.3s;
    }
    
    .nav-logo {
      font-weight: 700;
      font-size: 1.3rem;
      color: var(--primary-blue);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    
    .nav-logo i {
      font-size: 1.4rem;
    }
    
    .nav-links {
      display: flex;
      gap: 18px;
      align-items: center;
    }
    
    .nav-links a {
      font-size: 0.9rem;
      font-weight: 500;
      color: #475569;
      padding: 6px 2px;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-blue);
      border-bottom-color: var(--primary-blue);
    }
    
    .nav-cta {
      background: var(--accent-orange);
      color: white !important;
      border-radius: 24px;
      padding: 10px 22px !important;
      font-weight: 600;
      font-size: 0.9rem;
      border: none;
      cursor: pointer;
      transition: background 0.2s, transform 0.2s;
      white-space: nowrap;
      border-bottom: none !important;
    }
    
    .nav-cta:hover {
      background: #E04A00;
      transform: translateY(-1px);
      color: white !important;
    }
    
    /* Hero */
    #hero {
      padding: 140px 0 100px;
      background: linear-gradient(180deg, #FFFFFF 0%, var(--bg-light) 100%);
    }
    
    .hero-content {
      display: flex;
      align-items: center;
      gap: 40px;
    }
    
    .hero-text {
      flex: 5;
    }
    
    .hero-text h1 {
      font-size: 48px;
      font-weight: 700;
      color: var(--text-dark);
      line-height: 1.2;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }
    
    .hero-text h1::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -12px;
      width: 60px;
      height: 3px;
      background: var(--primary-blue);
      border-radius: 4px;
    }
    
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 420px;
      margin: 24px 0 32px;
      line-height: 1.5;
    }
    
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .btn-primary {
      background: var(--accent-orange);
      color: white;
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      font-weight: 600;
      font-size: 1rem;
      border: none;
      cursor: pointer;
      transition: all 0.2s;
      display: inline-block;
    }
    
    .btn-primary:hover {
      background: #E04A00;
      transform: translateY(-2px);
      color: white;
    }
    
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary-blue);
      color: var(--primary-blue);
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: all 0.2s;
    }
    
    .btn-outline:hover {
      background: rgba(10,110,255,0.05);
      transform: translateY(-2px);
    }
    
    .hero-image {
      flex: 7;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 340px;
      border-radius: 20px;
      box-shadow: var(--shadow-sm);
      background-blend-mode: overlay;
      background-color: rgba(10,110,255,0.02);
    }
    
    /* 指标看板 */
    .section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 40px;
      color: var(--text-dark);
    }
    
    .metric-card {
      background: linear-gradient(135deg, #FFFFFF 0%, #F0F6FF 100%);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      text-align: left;
    }
    
    .metric-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    
    .metric-value {
      font-family: var(--font-mono);
      font-size: 42px;
      font-weight: 700;
      color: var(--primary-blue);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .metric-trend {
      font-size: 22px;
    }
    
    .trend-up { color: #10B981; }
    .trend-down { color: var(--accent-orange); }
    
    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
      margin-top: 8px;
    }
    
    /* 服务矩阵 */
    .service-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      position: relative;
      overflow: hidden;
      border-bottom: 3px solid transparent;
    }
    
    .service-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-bottom-color: var(--primary-blue);
    }
    
    .service-icon {
      width: 48px;
      height: 48px;
      background: #F0F6FF;
      border-radius: 8px;
      margin-bottom: 20px;
      overflow: hidden;
      transition: transform 0.2s;
    }
    
    .service-card:hover .service-icon {
      transform: scale(1.05);
    }
    
    .service-icon img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    
    .service-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    
    .service-card p {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.5;
    }
    
    /* 对比表 */
    .compare-table {
      background: white;
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    
    .compare-row {
      display: flex;
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
      align-items: center;
    }
    
    .compare-left {
      flex: 1;
      color: var(--text-muted);
      font-weight: 500;
    }
    
    .compare-right {
      flex: 2;
      display: flex;
      gap: 24px;
    }
    
    .col-traditional, .col-extreme {
      flex: 1;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .col-extreme {
      color: var(--primary-blue);
      font-weight: 600;
    }
    
    .check-blue { color: var(--primary-blue); }
    .cross-gray { color: #94A3B8; }
    
    /* FAQ */
    .accordion-title {
      font-size: 1rem;
      font-weight: 600;
      background: white;
      border-radius: 8px;
      padding: 16px 20px;
      border: 1px solid var(--border-light);
      transition: 0.3s;
    }
    
    .accordion-title:hover {
      background: #F8FAFC;
    }
    
    .accordion-item.is-active .accordion-title {
      border-left: 3px solid var(--accent-orange);
      background: #F8FAFC;
    }
    
    .accordion-content {
      background: #F8FAFC;
      padding: 16px 20px;
      color: var(--text-muted);
      border: none;
      font-size: 0.95rem;
    }
    
    /* 表单 */
    .contact-form input, .contact-form textarea {
      border-radius: 8px;
      border: 1px solid var(--border-light);
      padding: 12px 16px;
      font-size: 1rem;
      transition: 0.2s;
    }
    
    .contact-form input:focus {
      border-color: var(--primary-blue);
      box-shadow: 0 0 0 3px rgba(10,110,255,0.15);
      outline: none;
    }
    
    .trust-badge {
      background: white;
      border-radius: 12px;
      padding: 20px;
      box-shadow: var(--shadow-sm);
    }
    
    .submit-btn {
      background: var(--accent-orange);
      color: white;
      border-radius: 8px;
      padding: 14px 32px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: 0.2s;
      width: 100%;
    }
    
    .submit-btn:hover {
      background: #E04A00;
    }
    
    footer {
      background: white;
      border-top: 1px solid var(--border-light);
      padding: 24px;
      text-align: center;
      font-size: 13px;
      color: #94A3B8;
    }
    
    @media (max-width: 1024px) {
      .hero-content {
        flex-direction: column;
      }
      .hero-image {
        min-height: 280px;
        width: 100%;
      }
    }
    
    @media (max-width: 640px) {
      #main-nav {
        bottom: 16px;
        top: auto;
        border-radius: 32px;
        padding: 8px 16px;
        width: 94%;
      }
      .nav-links {
        display: none;
      }
      .nav-cta {
        padding: 8px 18px;
        font-size: 0.8rem;
      }
      .hero-text h1 {
        font-size: 36px;
      }
      .section-title {
        font-size: 26px;
      }
      .metric-value {
        font-size: 32px;
      }
    }