/* roulang page: index */
:root {
      --bg-dark: #0B0F19;
      --bg-card: #131A2A;
      --bg-card-hover: #1C263B;
      --primary: #00F2B4;
      --primary-hover: #00d9a1;
      --secondary: #4F46E5;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --text-dim: #64748B;
      --border-color: rgba(255, 255, 255, 0.08);
      --border-glow: rgba(0, 242, 180, 0.3);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
      --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-family);
    }

    body {
      line-height: 1.75;
      letter-spacing: -0.01em;
      overflow-x: hidden;
      background: radial-gradient(circle at 50% 0%, #151d30 0%, var(--bg-dark) 70%);
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-sm);
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 15, 25, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-color);
    }

    .top-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 6px 0;
      font-size: 12px;
      color: var(--text-dim);
      border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    }

    .top-bar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .indicator-dot {
      width: 7px;
      height: 7px;
      background: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
    }

    .nav-main {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 16px 0;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }

    .logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      color: #0B0F19;
      font-size: 16px;
    }

    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
    }

    .nav-links a {
      color: var(--text-muted);
      font-size: 14px;
      font-weight: 500;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid transparent;
      text-align: center;
    }

    .btn-primary {
      background: var(--primary);
      color: #070B13;
      box-shadow: 0 4px 14px rgba(0, 242, 180, 0.25);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 6px 20px rgba(0, 242, 180, 0.4);
      transform: translateY(-2px);
    }

    .btn-ghost {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.2);
      color: var(--text-main);
    }

    .btn-ghost:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(0, 242, 180, 0.05);
      transform: translateY(-2px);
    }

    /* 板块通用规范 */
    section {
      padding: 90px 0;
      position: relative;
      scroll-margin-top: 80px;
    }

    .section-alt {
      background: rgba(19, 26, 42, 0.4);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      margin-bottom: 50px;
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .badge-tag {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 242, 180, 0.1);
      border: 1px solid rgba(0, 242, 180, 0.25);
      color: var(--primary);
      font-size: 12px;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 14px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.8;
    }

    /* 板块 1: Hero 首屏 */
    .hero-section {
      padding: 100px 0 120px;
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      position: relative;
    }

    .hero-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(11, 15, 25, 0.85) 0%, rgba(11, 15, 25, 0.98) 100%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 880px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.02em;
      background: linear-gradient(180deg, #FFFFFF 0%, #94A3B8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-p {
      color: #CBD5E1;
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 36px;
      text-align: justify;
      text-align-last: center;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }

    .hero-meta-strip {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 32px;
      border-top: 1px solid var(--border-color);
      padding-top: 30px;
      color: var(--text-dim);
      font-size: 13px;
      flex-wrap: wrap;
    }

    /* 板块 2: 核心指标条 */
    .metrics-bar {
      padding: 40px 0;
      background: #0d1322;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .metric-item {
      padding: 24px;
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .metric-value {
      font-size: 34px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
      font-family: monospace, sans-serif;
    }

    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 板块 3: 客户案例 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .case-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .case-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow);
    }

    .case-img-box {
      height: 220px;
      overflow: hidden;
      position: relative;
    }

    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .case-card:hover .case-img-box img {
      transform: scale(1.05);
    }

    .case-body {
      padding: 26px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .case-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .case-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .case-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .case-tag {
      font-size: 12px;
      padding: 4px 10px;
      background: rgba(255, 255, 255, 0.05);
      border-radius: 4px;
      color: var(--text-dim);
    }

    /* 板块 4: 前后对比 */
    .compare-container {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .compare-col {
      padding: 32px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .compare-traditional {
      background: rgba(255, 255, 255, 0.02);
    }

    .compare-modern {
      background: var(--bg-card);
      border-color: rgba(0, 242, 180, 0.3);
      position: relative;
    }

    .compare-badge {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .compare-traditional .compare-badge {
      background: rgba(239, 68, 68, 0.15);
      color: #F87171;
    }

    .compare-modern .compare-badge {
      background: rgba(0, 242, 180, 0.15);
      color: var(--primary);
    }

    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .compare-item {
      font-size: 14px;
      color: var(--text-muted);
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .compare-item strong {
      color: var(--text-main);
      display: block;
      margin-bottom: 2px;
    }

    /* 板块 5: 全栈架构卖点三连 */
    .features-tri-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-tri-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .feature-tri-card:hover {
      border-color: var(--border-glow);
      transform: translateY(-4px);
    }

    .feature-icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(0, 242, 180, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
      font-size: 20px;
      font-weight: bold;
    }

    .feature-tri-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .feature-tri-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 6: 平台开发方案选型 */
    .packages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: stretch;
    }

    .package-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: all 0.3s ease;
    }

    .package-card.highlight {
      border-color: var(--primary);
      box-shadow: 0 0 30px rgba(0, 242, 180, 0.15);
      transform: translateY(-8px);
      background: #162035;
    }

    .package-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .package-spec {
      font-size: 13px;
      color: var(--primary);
      margin-bottom: 20px;
      font-weight: 600;
    }

    .package-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .package-features {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 30px;
      flex-grow: 1;
    }

    .package-features li {
      font-size: 13px;
      color: var(--text-muted);
      padding-left: 18px;
      position: relative;
    }

    .package-features li::before {
      content: "•";
      position: absolute;
      left: 0;
      color: var(--primary);
      font-size: 16px;
      top: -2px;
    }

    /* 板块 7: 场景交互演示 */
    .scene-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
    }

    .scene-info h3 {
      font-size: 24px;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .scene-info p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 24px;
    }

    .scene-props {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .scene-prop-card {
      background: rgba(255, 255, 255, 0.03);
      padding: 14px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.05);
    }

    .scene-prop-title {
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 4px;
    }

    .scene-prop-desc {
      font-size: 12px;
      color: var(--text-dim);
    }

    .scene-img-wrapper {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
    }

    /* 板块 8: 合规风控与数据安全 */
    .security-layout {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }

    .security-text h3 {
      font-size: 26px;
      margin-bottom: 18px;
    }

    .security-text p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 24px;
    }

    .security-pillars {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .pillar-item {
      padding: 16px 20px;
      background: var(--bg-card);
      border-left: 3px solid var(--primary);
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }

    .pillar-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .pillar-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 板块 9: 6大技术优势矩阵 */
    .grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .grid-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      transition: all 0.3s ease;
    }

    .grid-card:hover {
      border-color: var(--border-glow);
      transform: translateY(-3px);
    }

    .grid-card-num {
      font-size: 12px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 12px;
      letter-spacing: 0.1em;
    }

    .grid-card-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .grid-card-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 10: 交付链路时间线 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .timeline-step {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      position: relative;
    }

    .step-index {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: rgba(0, 242, 180, 0.15);
      color: var(--primary);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 14px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 11: 技术动态资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.3s ease;
    }

    .news-card:hover {
      border-color: rgba(255, 255, 255, 0.2);
    }

    .news-meta {
      font-size: 12px;
      color: var(--text-dim);
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
    }

    .news-title {
      font-size: 16px;
      font-weight: 700;
      line-height: 1.5;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .news-excerpt {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 12: 转化召唤与服务保障条 */
    .cta-wrapper {
      background: linear-gradient(135deg, #131A2A 0%, #1e2840 100%);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      text-align: center;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }

    .cta-wrapper h2 {
      font-size: 30px;
      font-weight: 800;
      margin-bottom: 14px;
      color: var(--text-main);
    }

    .cta-wrapper p {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto 30px;
      line-height: 1.8;
    }

    .cta-form {
      display: flex;
      justify-content: center;
      gap: 12px;
      max-width: 520px;
      margin: 0 auto 40px;
      flex-wrap: wrap;
    }

    .cta-input {
      flex: 1;
      min-width: 240px;
      padding: 12px 18px;
      background: rgba(11, 15, 25, 0.8);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 14px;
      outline: none;
    }

    .cta-input:focus {
      border-color: var(--primary);
    }

    .guarantees-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 30px;
      text-align: left;
    }

    .guarantee-item-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .guarantee-item-desc {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 页脚 */
    .site-footer {
      background: #070A12;
      border-top: 1px solid var(--border-color);
      padding: 70px 0 30px;
      font-size: 13px;
      color: var(--text-dim);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }

    .footer-brand-desc {
      line-height: 1.7;
      margin-bottom: 16px;
      color: var(--text-muted);
    }

    .footer-col-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a:hover {
      color: var(--primary);
    }

    .footer-contact-item {
      margin-bottom: 10px;
      line-height: 1.6;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-h1 { font-size: 36px; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .features-tri-grid { grid-template-columns: 1fr; }
      .packages-grid { grid-template-columns: 1fr; }
      .package-card.highlight { transform: none; }
      .grid-6 { grid-template-columns: repeat(2, 1fr); }
      .timeline-steps { grid-template-columns: repeat(2, 1fr); }
      .guarantees-strip { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .nav-links { display: none; }
      .hero-h1 { font-size: 28px; }
      .cases-grid { grid-template-columns: 1fr; }
      .compare-container { grid-template-columns: 1fr; }
      .scene-box { grid-template-columns: 1fr; padding: 24px; }
      .security-layout { grid-template-columns: 1fr; }
      .grid-6 { grid-template-columns: 1fr; }
      .timeline-steps { grid-template-columns: 1fr; }
      .news-grid { grid-template-columns: 1fr; }
      .guarantees-strip { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }