/* roulang page: index */
:root {
      --primary-deep: #0A0E17;
      --accent-red: #E63946;
      --accent-red-hover: #C1121F;
      --accent-gold: #F4A261;
      --bg-light: #F8F9FA;
      --card-white: #FFFFFF;
      --dark-section: #1D263B;
      --text-dark: #1e293b;
      --text-gray: #64748b;
      --text-light: #B0B8C1;
      --text-on-dark: #F1F5F9;
      --border-light: #e9eef2;
      --shadow-sm: 0 2px 12px rgba(10,14,23,0.06);
      --shadow-md: 0 8px 24px rgba(230,57,70,0.12);
      --shadow-hover: 0 18px 32px rgba(10,14,23,0.1);
      --radius-card: 16px;
      --radius-btn: 12px;
      --radius-input: 10px;
      --transition: all 0.25s ease;
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
      --container-max: 1200px;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.6;
      scroll-behavior: smooth;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 1.5rem;
      width: 100%;
    }

    /* 顶部信息条 */
    .top-bar {
      background: var(--primary-deep);
      color: #CCCCCC;
      height: 40px;
      display: flex;
      align-items: center;
      font-size: 0.85rem;
      letter-spacing: 0.3px;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
    }
    .top-bar a {
      color: #CCCCCC;
      text-decoration: none;
      font-weight: 500;
    }
    .top-bar a:hover {
      color: white;
    }
    .top-bar .domain-tag {
      display: flex;
      align-items: center;
      gap: 0.65rem;
    }
    .top-bar .domain-tag span {
      background: rgba(255,255,255,0.08);
      padding: 0.2rem 0.7rem;
      border-radius: 20px;
      font-size: 0.75rem;
      color: #F4A261;
      font-weight: 600;
    }
    .top-bar .contact-entry i {
      margin-right: 5px;
      color: var(--accent-gold);
    }

    /* 主导航 */
    .main-nav {
      background: #FFFFFF;
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      position: sticky;
      top: 0;
      z-index: 999;
      transition: var(--transition);
    }
    .main-nav .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0.8rem 1.5rem;
      max-width: var(--container-max);
      margin: 0 auto;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      text-decoration: none;
      color: var(--primary-deep);
    }
    .logo-img {
      height: 36px;
      width: auto;
      border-radius: 8px;
    }
    .logo-text {
      font-size: 1.7rem;
      font-weight: 800;
      color: var(--accent-red);
      letter-spacing: -0.5px;
      margin-left: 2px;
    }
    .nav-links {
      display: flex;
      gap: 2.2rem;
      align-items: center;
    }
    .nav-links a {
      text-decoration: none;
      color: #334155;
      font-weight: 600;
      font-size: 0.95rem;
      position: relative;
      padding: 0.25rem 0;
      transition: var(--transition);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-red);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-red);
      transition: 0.25s;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--primary-deep);
      cursor: pointer;
    }

    /* 英雄区 Hero */
    .hero {
      background: linear-gradient(135deg, #0A0E17 0%, #141b2b 100%);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      color: white;
      padding: 5rem 0 4.5rem;
      position: relative;
      display: flex;
      align-items: center;
    }
    .hero .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 2rem;
      flex-wrap: wrap;
    }
    .hero-content {
      flex: 1 1 500px;
    }
    .hero h1 {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.02em;
      color: white;
      margin-bottom: 1.3rem;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: #B0B8C1;
      margin-bottom: 2.2rem;
      line-height: 1.7;
    }
    .hero-buttons {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-red);
      color: white;
      border: none;
      padding: 0.85rem 2.2rem;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      transition: 0.2s;
      text-decoration: none;
      display: inline-block;
      box-shadow: 0 8px 18px rgba(230,57,70,0.3);
    }
    .btn-primary:hover {
      background: var(--accent-red-hover);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(230,57,70,0.4);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-red);
      color: var(--accent-red);
      padding: 0.8rem 2.2rem;
      border-radius: var(--radius-btn);
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      transition: 0.2s;
      text-decoration: none;
      display: inline-block;
    }
    .btn-outline:hover {
      background: var(--accent-red);
      color: white;
    }
    .floating-stats {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      padding: 1.6rem;
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
      border: 1px solid rgba(255,255,255,0.12);
      color: white;
      min-width: 240px;
    }
    .stat-item {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
    }
    .stat-value {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--accent-gold);
    }
    .stat-label {
      font-size: 0.9rem;
      color: #ccc;
    }

    /* 通用板块标题 */
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 2.5rem;
      text-align: center;
      color: var(--primary-deep);
      position: relative;
    }
    .section-title::after {
      content: '';
      display: block;
      width: 70px;
      height: 4px;
      background: var(--accent-red);
      margin: 0.7rem auto 0;
      border-radius: 2px;
    }

    /* 指标看板 */
    .metrics {
      padding: 4.5rem 0;
      background: #F8F9FA;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 1.8rem;
      text-align: center;
    }
    .metric-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem 1.2rem;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .metric-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .metric-number {
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--accent-red);
      margin-bottom: 0.3rem;
    }
    .metric-label {
      font-weight: 600;
      color: #475569;
    }

    /* 服务矩阵 */
    .services {
      padding: 5rem 0;
      background: white;
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 2rem;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      border: 1px solid transparent;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent-red);
    }
    .service-icon {
      font-size: 2.6rem;
      color: var(--accent-red);
      margin-bottom: 1.4rem;
    }
    .service-card h3 {
      font-size: 1.4rem;
      margin-bottom: 0.8rem;
    }
    .service-desc {
      color: #475569;
      margin-bottom: 1.5rem;
      flex: 1;
    }
    .service-link {
      color: var(--accent-red);
      font-weight: 700;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
    }

    /* 对比区 */
    .compare {
      background: #1D263B;
      padding: 4.5rem 0;
      color: white;
    }
    .compare .section-title {
      color: white;
    }
    .compare-table {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2.5rem;
      max-width: 900px;
      margin: 0 auto;
    }
    .compare-col {
      background: rgba(255,255,255,0.06);
      border-radius: 20px;
      padding: 2rem;
    }
    .compare-col.right {
      background: rgba(230,57,70,0.12);
      border: 1px solid var(--accent-red);
    }
    .compare-item {
      display: flex;
      justify-content: space-between;
      padding: 0.9rem 0;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .check-icon {
      color: var(--accent-gold);
      margin-right: 8px;
    }

    /* FAQ */
    .faq {
      padding: 4.5rem 0;
      background: #F8F9FA;
    }
    .accordion-item {
      background: white;
      border-radius: 14px;
      margin-bottom: 1rem;
      box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    }
    .accordion-question {
      padding: 1.2rem 1.8rem;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-left: 4px solid var(--accent-red);
    }
    .accordion-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      padding: 0 1.8rem;
      color: #334155;
    }
    .accordion-item.active .accordion-answer {
      max-height: 200px;
      padding: 1rem 1.8rem 1.5rem;
    }

    /* CTA 转化 */
    .cta-section {
      background: linear-gradient(135deg, #0A0E17 0%, #E63946 100%);
      padding: 4.5rem 0;
      color: white;
      text-align: center;
    }
    .cta-form {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
      justify-content: center;
      margin-top: 2rem;
    }
    .cta-form input {
      padding: 0.9rem 1.2rem;
      border-radius: var(--radius-input);
      border: none;
      background: white;
      min-width: 200px;
      font-size: 1rem;
    }
    .btn-gold {
      background: var(--accent-gold);
      border: none;
      color: #0A0E17;
      font-weight: 800;
      padding: 0.9rem 2rem;
      border-radius: var(--radius-btn);
      cursor: pointer;
    }

    /* 页脚 */
    .footer {
      background: #0A0E17;
      color: #999;
      padding: 3rem 0 1.5rem;
    }
    .footer-grid {
      display: flex;
      justify-content: space-between;
      gap: 2rem;
      flex-wrap: wrap;
    }
    .footer a {
      color: #aaa;
      text-decoration: none;
    }

    @media (max-width: 1024px) {
      .metrics-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .hero h1 { font-size: 2rem; }
      .compare-table { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: 1fr; }
    }