.eg-quality {
    --eg-blue: #0a2f6b;
    --eg-blue-2: #124f94;
    --eg-cyan: #0c8d9b;
    --eg-red: #d71920;
    --eg-text: #263548;
    --eg-muted: #607086;
    --eg-border: #dce5ef;
    --eg-bg: #f5f8fc;
    --eg-white: #ffffff;

    max-width: 1200px;
    margin: 0 auto;
    padding: 72px 24px;
    color: var(--eg-text);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.65;
    box-sizing: border-box;
  }

  .eg-quality *,
  .eg-quality *::before,
  .eg-quality *::after {
    box-sizing: border-box;
  }

  .eg-quality h2,
  .eg-quality h3,
  .eg-quality h4,
  .eg-quality p {
    margin-top: 0;
  }

  /* 顶部标题 */
  .eg-quality__hero {
    max-width: 860px;
    margin: 0 auto 42px;
    text-align: center;
  }

  .eg-quality__eyebrow {
    margin-bottom: 12px;
    color: var(--eg-cyan);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1.8px;
    text-transform: uppercase;
  }

  .eg-quality__hero h2 {
    margin-bottom: 18px;
    color: var(--eg-blue);
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.18;
  }

  .eg-quality__lead {
    margin-bottom: 0;
    color: var(--eg-muted);
    font-size: 17px;
  }

  /* 数据概览 */
  .eg-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin-bottom: 64px;
    overflow: hidden;
    background: var(--eg-blue);
    border-radius: 16px;
    box-shadow: 0 16px 38px rgba(10, 47, 107, 0.16);
  }

  .eg-stat {
    min-height: 138px;
    padding: 28px 20px;
    text-align: center;
    border-right: 1px solid rgba(255, 255, 255, 0.18);
  }

  .eg-stat:last-child {
    border-right: 0;
  }

  .eg-stat__value {
    display: block;
    margin-bottom: 5px;
    color: var(--eg-white);
    font-size: 30px;
    font-weight: 700;
    line-height: 1.15;
  }

  .eg-stat__label {
    color: rgba(255, 255, 255, 0.78);
    font-size: 13px;
    line-height: 1.45;
  }

  /* 通用区块标题 */
  .eg-section-heading {
    max-width: 760px;
    margin: 0 auto 30px;
    text-align: center;
  }

  .eg-section-heading h3 {
    margin-bottom: 10px;
    color: var(--eg-blue);
    font-size: 28px;
    line-height: 1.25;
  }

  .eg-section-heading p {
    margin-bottom: 0;
    color: var(--eg-muted);
  }

  /* 认证卡片 */
  .eg-certifications {
    margin-bottom: 68px;
  }

  .eg-cert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }

  .eg-cert-card {
    position: relative;
    min-height: 230px;
    padding: 28px 24px 24px;
    overflow: hidden;
    background: var(--eg-white);
    border: 1px solid var(--eg-border);
    border-radius: 14px;
    box-shadow: 0 8px 24px rgba(25, 51, 82, 0.07);
  }

  .eg-cert-card::before {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--eg-cyan);
    content: "";
  }

  .eg-cert-card--system::before {
    background: var(--eg-blue-2);
  }

  .eg-cert-card--patent::before {
    background: var(--eg-red);
  }

  .eg-cert-card__code {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 64px;
    height: 32px;
    margin-bottom: 18px;
    padding: 0 12px;
    color: var(--eg-blue);
    background: #edf4fb;
    border-radius: 18px;
    font-size: 13px;
    font-weight: 700;
  }

  .eg-cert-card h4 {
    margin-bottom: 10px;
    color: var(--eg-blue);
    font-size: 18px;
    line-height: 1.35;
  }

  .eg-cert-card p {
    margin-bottom: 0;
    color: var(--eg-muted);
    font-size: 14px;
  }

  /* 内部质量流程 */
  .eg-control {
    margin-bottom: 68px;
    padding: 48px 38px;
    background: var(--eg-bg);
    border-radius: 18px;
  }

  .eg-control-flow {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 34px;
    margin-top: 36px;
  }

  .eg-control-step {
    position: relative;
    text-align: center;
  }

  .eg-control-step:not(:last-child)::after {
    position: absolute;
    top: 27px;
    right: -26px;
    width: 18px;
    height: 2px;
    background: #9fb5ca;
    content: "";
  }

  .eg-control-step__number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin-bottom: 18px;
    color: var(--eg-white);
    background: var(--eg-blue);
    border-radius: 50%;
    box-shadow: 0 7px 16px rgba(10, 47, 107, 0.2);
    font-size: 14px;
    font-weight: 700;
  }

  .eg-control-step h4 {
    margin-bottom: 8px;
    color: var(--eg-blue);
    font-size: 17px;
  }

  .eg-control-step p {
    margin-bottom: 0;
    color: var(--eg-muted);
    font-size: 14px;
    line-height: 1.55;
  }

  /* 可靠性与交付 */
  .eg-two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 36px;
  }

  .eg-info-panel {
    padding: 32px;
    background: var(--eg-white);
    border: 1px solid var(--eg-border);
    border-radius: 14px;
  }

  .eg-info-panel h3 {
    margin-bottom: 18px;
    color: var(--eg-blue);
    font-size: 22px;
  }

  .eg-check-list {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .eg-check-list li {
    position: relative;
    margin-bottom: 11px;
    padding-left: 25px;
    color: var(--eg-muted);
    font-size: 14px;
  }

  .eg-check-list li:last-child {
    margin-bottom: 0;
  }

  .eg-check-list li::before {
    position: absolute;
    top: 2px;
    left: 0;
    color: var(--eg-cyan);
    font-weight: 700;
    content: "✓";
  }

  /* 合规提示 */
  .eg-notice {
    margin-bottom: 44px;
    padding: 25px 28px;
    background: #fff8eb;
    border: 1px solid #f0d7a5;
    border-left: 5px solid #d99b25;
    border-radius: 10px;
  }

  .eg-notice h3 {
    margin-bottom: 10px;
    color: #7b5312;
    font-size: 18px;
  }

  .eg-notice p {
    margin-bottom: 0;
    color: #725c38;
    font-size: 14px;
  }

  /* CTA */
  .eg-quality__cta {
    padding: 42px 32px;
    text-align: center;
    background: linear-gradient(135deg, var(--eg-blue), var(--eg-blue-2));
    border-radius: 18px;
  }

  .eg-quality__cta h3 {
    margin-bottom: 12px;
    color: var(--eg-white);
    font-size: 28px;
  }

  .eg-quality__cta p {
    max-width: 760px;
    margin: 0 auto 24px;
    color: rgba(255, 255, 255, 0.82);
  }

  .eg-quality__button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    color: var(--eg-blue);
    background: var(--eg-white);
    border-radius: 7px;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }

  .eg-quality__button:hover {
    color: var(--eg-blue);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.16);
  }

  @media (max-width: 980px) {
    .eg-stats,
    .eg-cert-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .eg-stat:nth-child(2) {
      border-right: 0;
    }

    .eg-stat:nth-child(-n + 2) {
      border-bottom: 1px solid rgba(255, 255, 255, 0.18);
    }

    .eg-control-flow {
      grid-template-columns: repeat(2, 1fr);
    }

    .eg-control-step::after {
      display: none;
    }
  }

  @media (max-width: 680px) {
    .eg-quality {
      padding: 48px 16px;
    }

    .eg-stats,
    .eg-cert-grid,
    .eg-control-flow,
    .eg-two-column {
      grid-template-columns: 1fr;
    }

    .eg-stat {
      border-right: 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.18);
    }

    .eg-stat:last-child {
      border-bottom: 0;
    }

    .eg-control {
      padding: 38px 22px;
    }

    .eg-control-step {
      padding-bottom: 12px;
    }

    .eg-info-panel {
      padding: 26px 22px;
    }

    .eg-quality__cta {
      padding: 36px 22px;
    }
  }