/* roulang page: index */
:root {
      --bg-deep: #1a1a1c;
      --red: #e63946;
      --red-hover: #c1121f;
      --blue-dark: #1d3557;
      --blue-mid: #457b9d;
      --gold: #c9a96e;
      --white: #ffffff;
      --gray-light-bg: #f8f9fa;
      --gray-card-bg: #f1f3f5;
      --text-dark: #212529;
      --text-muted: #6c757d;
      --border-light: #e9ecef;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 20px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --container-max: 1280px;
      --section-padding: 100px;
      --card-padding: 32px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--white);
      color: var(--text-dark);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    h1, h2, h3 {
      font-weight: 600;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.25s ease;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: var(--white);
      border-bottom: 1px solid var(--border-light);
      z-index: 100;
      height: 72px;
      display: flex;
      align-items: center;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--text-dark);
      letter-spacing: 1px;
    }
    .logo span {
      color: var(--red);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2.5rem;
    }

    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-dark);
      position: relative;
      padding-bottom: 6px;
      transition: color 0.2s;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--red);
    }

    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--red);
      border-radius: 3px;
    }

    .btn-nav-cta {
      background: var(--red);
      color: white;
      padding: 8px 22px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 0.9rem;
      margin-left: 1.2rem;
    }
    .btn-nav-cta:hover {
      background: var(--red-hover);
      box-shadow: 0 0 12px rgba(230,57,70,0.4);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 25px;
      height: 2px;
      background: var(--text-dark);
      border-radius: 2px;
    }

    /* Hero */
    .hero {
      background-color: var(--bg-deep);
      background-image: radial-gradient(circle at 20% 30%, rgba(201,169,110,0.08) 0%, transparent 45%),
                        radial-gradient(circle at 80% 70%, rgba(230,57,70,0.06) 0%, transparent 50%),
                        url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      padding-top: 160px;
      padding-bottom: 100px;
      color: white;
      position: relative;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .hero-left h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.2rem;
    }
    .hero-sub {
      font-size: 1.25rem;
      color: var(--gold);
      margin-bottom: 2rem;
    }
    .btn-primary {
      background: var(--red);
      color: white;
      padding: 16px 40px;
      font-size: 1.1rem;
      font-weight: 600;
      border-radius: var(--radius-btn);
      box-shadow: 0 4px 14px rgba(230,57,70,0.3);
    }
    .btn-primary:hover {
      background: var(--red-hover);
      box-shadow: 0 0 16px rgba(230,57,70,0.5);
    }

    .dashboard-cards {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 20px;
    }
    .stat-card {
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-card);
      padding: 24px 18px;
      text-align: center;
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--red);
      font-feature-settings: "tnum";
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
    }
    .stat-label {
      color: rgba(255,255,255,0.75);
      font-size: 0.9rem;
      margin-top: 8px;
    }
    .arrow-up {
      font-size: 1.3rem;
      color: var(--red);
    }

    /* 通用板块 */
    .section {
      padding: var(--section-padding) 0;
    }
    .section-light {
      background: var(--gray-light-bg);
    }

    .section-title {
      font-size: 2rem;
      font-weight: 600;
      margin-bottom: 3rem;
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .title-decor {
      width: 40px;
      height: 4px;
      background: var(--gold);
      border-radius: 2px;
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 32px;
    }
    .service-card {
      background: var(--white);
      padding: var(--card-padding);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--red);
      transition: all 0.25s ease;
    }
    .service-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
      border-left-width: 6px;
    }
    .service-icon {
      font-size: 2rem;
      margin-bottom: 1.2rem;
    }
    .service-card h3 {
      font-size: 1.4rem;
      margin-bottom: 0.8rem;
    }
    .tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 1.5rem;
    }
    .tag {
      background: #e7f1f9;
      color: var(--blue-mid);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 500;
    }

    /* 对比区 */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      gap: 30px;
    }
    .compare-col {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
    }
    .vs-badge {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--gold);
      opacity: 0.7;
    }
    .data-row {
      display: flex;
      justify-content: space-between;
      margin: 18px 0;
      align-items: center;
    }
    .progress-bar {
      width: 60%;
      height: 8px;
      background: #e9ecef;
      border-radius: 4px;
      overflow: hidden;
    }
    .progress-fill {
      height: 100%;
      border-radius: 4px;
    }
    .fill-red { background: var(--red); width: 72%; }
    .fill-blue { background: var(--blue-mid); width: 65%; }

    .btn-outline {
      border: 2px solid var(--red);
      color: var(--red);
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      background: transparent;
      margin-top: 24px;
    }
    .btn-outline:hover {
      background: rgba(230,57,70,0.06);
    }

    /* 案例横向滚动 */
    .cases-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scroll-snap-type: x mandatory;
    }
    .case-card {
      min-width: 280px;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      background: white;
      scroll-snap-align: start;
    }
    .case-img {
      height: 160px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .case-overlay {
      background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, transparent 70%);
      position: absolute;
      bottom: 0;
      width: 100%;
      padding: 16px;
      color: white;
    }

    /* FAQ */
    .faq-item {
      background: var(--gray-card-bg);
      border-radius: 8px;
      margin-bottom: 12px;
      padding: 0 20px;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      font-weight: 600;
      font-size: 1.1rem;
      padding: 18px 0;
      display: flex;
      align-items: center;
      gap: 12px;
      background: transparent;
      border: none;
      color: var(--text-dark);
    }
    .faq-dot {
      width: 8px;
      height: 8px;
      background: var(--red);
      border-radius: 50%;
    }
    .faq-answer {
      padding: 0 0 20px 28px;
      color: #495057;
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    /* CTA */
    .cta-dark {
      background: var(--bg-deep);
      color: white;
    }
    .cta-form {
      display: flex;
      gap: 12px;
      max-width: 520px;
      margin: 2rem auto 0;
    }
    .cta-input {
      flex:1;
      padding: 14px 18px;
      border-radius: var(--radius-btn);
      border: 1px solid #ced4da;
      font-size: 1rem;
    }
    .btn-submit {
      background: var(--red);
      color: white;
      padding: 14px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }

    /* Footer */
    .footer {
      background: var(--bg-deep);
      color: #ccc;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .services-grid, .footer-grid { grid-template-columns: 1fr; }
      .compare-wrapper { grid-template-columns: 1fr; }
      .vs-badge { text-align: center; }
      .cta-form { flex-direction: column; }
      .section { padding: 60px 0; }
      h1 { font-size: 2.2rem; }
    }