body {
  background: #f6f8f9;
}

.insights-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 90px 28px 110px;
}

.insights-hero {
  max-width: 850px;
  padding: 40px 0 75px;
}

.insights-kicker {
  margin: 0 0 14px;
  color: #5aa400;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
}

.insights-hero h1 {
  margin: 0 0 24px;
  max-width: 820px;
  color: #071a28;
  font-size: clamp(42px, 5vw, 68px);
  line-height: 1.05;
}

.insights-lead {
  max-width: 720px;
  margin: 0;
  color: #667079;
  font-size: 19px;
  line-height: 1.75;
}

.insights-section {
  padding-top: 30px;
}

.insights-section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 28px;
}

.insights-section-head h2 {
  margin: 0;
  color: #071a28;
  font-size: 34px;
}

.insights-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.insight-card {
  min-height: 300px;
  padding: 34px;
  border: 1px solid #e1e6e8;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 18px 45px rgba(7, 26, 40, .06);
}

.insight-tag {
  margin-bottom: 18px;
  color: #5aa400;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.insight-card h3 {
  margin: 0 0 18px;
  font-size: 25px;
  line-height: 1.3;
}

.insight-card h3 a {
  color: #071a28;
  text-decoration: none;
}

.insight-card p {
  color: #69727a;
  font-size: 16px;
  line-height: 1.75;
}

.insight-read {
  display: inline-block;
  margin-top: 16px;
  color: #071a28;
  font-weight: 800;
  text-decoration: none;
}

.insight-read:hover,
.insight-card h3 a:hover {
  color: #5aa400;
}

.insights-footer {
  padding: 34px 20px;
  border-top: 1px solid #e0e5e8;
  background: #fff;
  color: #7b8389;
  text-align: center;
}

@media (max-width: 800px) {
  .insights-main {
    padding: 55px 20px 80px;
  }

  .insights-hero {
    padding-top: 20px;
  }

  .insights-grid {
    grid-template-columns: 1fr;
  }

  .insight-card {
    min-height: auto;
  }
}
/* =========================
   ARTICLE PAGE
   ========================= */

.article-main {
  max-width: 930px;
  margin: 0 auto;
  padding: 70px 28px 110px;
}

.article-breadcrumb {
  display: flex;
  gap: 10px;
  margin-bottom: 42px;
  color: #879097;
  font-size: 14px;
}

.article-breadcrumb a {
  color: #5a9800;
  text-decoration: none;
}

.article-header {
  padding-bottom: 42px;
  border-bottom: 1px solid #e1e6e8;
}

.article-header h1 {
  max-width: 850px;
  margin: 12px 0 24px;
  color: #071a28;
  font-size: clamp(40px, 5vw, 62px);
  line-height: 1.08;
}

.article-summary {
  max-width: 800px;
  color: #5f6971;
  font-size: 20px;
  line-height: 1.75;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 26px;
  color: #858e95;
  font-size: 13px;
}

.article-content {
  max-width: 780px;
  margin-top: 52px;
}

.article-content h2 {
  margin: 50px 0 18px;
  color: #071a28;
  font-size: 30px;
  line-height: 1.3;
}

.article-content p,
.article-content li {
  color: #414d55;
  font-size: 17px;
  line-height: 1.9;
}

.article-content ul {
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 9px;
}

.article-note,
.article-disclaimer {
  margin: 32px 0;
  padding: 24px 26px;
  border-left: 4px solid #9fea00;
  background: #f4f9e9;
  color: #3e4938;
  line-height: 1.75;
}

.buyer-checklist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 30px 0 44px;
}

.buyer-checklist div {
  display: flex;
  gap: 15px;
  align-items: flex-start;
  padding: 20px;
  border: 1px solid #e1e6e8;
  border-radius: 10px;
  background: #fff;
}

.buyer-checklist strong {
  color: #5aa400;
  font-size: 14px;
}

.buyer-checklist span {
  color: #33414a;
  line-height: 1.55;
}

.article-cta {
  margin: 65px 0 38px;
  padding: 38px;
  border-radius: 16px;
  background: #071a28;
}

.article-cta h2 {
  margin: 8px 0 15px;
  color: #fff;
}

.article-cta p {
  color: #c8d0d5;
}

.article-cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 25px;
}

.article-cta-actions a {
  display: inline-block;
  padding: 13px 20px;
  border-radius: 7px;
  background: #aaff00;
  color: #071a28;
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 700px) {

  .article-main {
    padding: 50px 20px 80px;
  }

  .buyer-checklist {
    grid-template-columns: 1fr;
  }

  .article-cta {
    padding: 28px 22px;
  }
}

/* =========================
   FEATURED INSIGHT LAYOUT
   ========================= */

.featured-insight {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(260px, .7fr);
  overflow: hidden;
  border: 1px solid #e1e6e8;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 20px 50px rgba(7, 26, 40, .06);
}

.featured-insight-content {
  padding: 46px 48px;
}

.featured-insight-content h3 {
  max-width: 650px;
  margin: 12px 0 20px;
  font-size: clamp(30px, 3vw, 44px);
  line-height: 1.15;
}

.featured-insight-content h3 a {
  color: #071a28;
  text-decoration: none;
}

.featured-insight-content p {
  max-width: 650px;
  color: #68727a;
  font-size: 17px;
  line-height: 1.75;
}

.featured-insight-side {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 42px;
  background: #071a28;
  color: #fff;
}

.featured-insight-side span {
  margin-bottom: 34px;
  color: #aaff00;
  font-size: 14px;
  font-weight: 800;
}

.featured-insight-side strong {
  font-size: 46px;
  line-height: .95;
}

.featured-insight-side small {
  margin-top: 20px;
  color: #9caab3;
  font-size: 11px;
  letter-spacing: .08em;
}

.insight-topics {
  margin-top: 85px;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.topic-card {
  min-height: 190px;
  padding: 26px;
  border: 1px solid #e1e6e8;
  border-radius: 12px;
  background: #fff;
}

.topic-card span {
  color: #5aa400;
  font-size: 12px;
  font-weight: 800;
}

.topic-card h3 {
  margin: 28px 0 12px;
  color: #071a28;
  font-size: 19px;
  line-height: 1.3;
}

.topic-card p {
  margin: 0;
  color: #737c83;
  font-size: 14px;
  line-height: 1.65;
}

@media (max-width: 850px) {
  .featured-insight {
    grid-template-columns: 1fr;
  }

  .featured-insight-side {
    min-height: 220px;
  }

  .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .featured-insight-content {
    padding: 30px 24px;
  }

  .topic-grid {
    grid-template-columns: 1fr;
  }
}
/* EN ISO 20471 class comparison table */
.comparison-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid #dfe5e8;
  border-radius: 10px;
  overflow: hidden;
}

.comparison-table th,
.comparison-table td {
  padding: 16px 18px;
  border-bottom: 1px solid #e8edef;
  text-align: left;
  vertical-align: top;
}

.comparison-table th {
  font-weight: 800;
  color: #0b1f2c;
  background: #f3f6f7;
}

.comparison-table td:first-child {
  font-weight: 700;
  color: #0b1f2c;
}

.comparison-table tbody tr:last-child td {
  border-bottom: 0;
}

@media (max-width: 700px) {
  .comparison-table-wrap {
    position: relative;
    overflow-x: auto;
    overflow-y: hidden;
    margin: 22px 0;
    padding-top: 30px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    overscroll-behavior-x: contain;
  }

  .comparison-table-wrap::before {
    content: "Swipe to view full table →";
    position: absolute;
    top: 0;
    left: 0;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #5b6870;
    white-space: nowrap;
  }

  .comparison-table {
    min-width: 600px;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 13px 14px;
    white-space: nowrap;
  }

  .class-comparison-table th:first-child,
  .class-comparison-table td:first-child {
    position: sticky;
    left: 0;
    z-index: 2;
    min-width: 140px;
    background: #fff;
    box-shadow: 8px 0 14px -14px rgba(0, 0, 0, 0.55);
  }

  .class-comparison-table thead th:first-child {
    z-index: 3;
    background: #f3f6f7;
  }
}

/* ========================================================
   SEO CONTENT CLUSTER CARDS
   ======================================================== */

.latest-guides-section {
  margin-top: 42px;
}

.latest-insight-card {
  max-width: 860px;
  padding: 30px 32px;
  background: #ffffff;
  border: 1px solid #dfe5e8;
  border-radius: 16px;
  box-shadow: 0 18px 40px rgba(11, 31, 44, 0.06);
}

.latest-insight-card .insight-tag {
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 800;
  color: #55a800;
}

.latest-insight-card h3 {
  margin: 0 0 14px;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.15;
}

.latest-insight-card h3 a {
  color: #0b1f2c;
  text-decoration: none;
}

.latest-insight-card h3 a:hover {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}

.latest-insight-card p {
  max-width: 700px;
  margin: 0 0 18px;
  line-height: 1.7;
  color: #66737c;
}

.latest-insight-card .insight-read {
  display: inline-block;
  font-weight: 800;
  color: #0b1f2c;
  text-decoration: none;
}

.related-guide-section {
  margin: 44px 0;
}

.related-guide-card {
  padding: 28px 30px;
  border: 1px solid #dfe5e8;
  border-left: 4px solid #9bea00;
  border-radius: 12px;
  background: #ffffff;
}

.related-guide-card h2 {
  margin-top: 0;
}

.related-guide-card p {
  margin-bottom: 18px;
}

.related-guide-link {
  display: inline-block;
  font-weight: 800;
  color: #397d00;
  text-decoration: none;
}

.related-guide-link:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

@media (max-width: 700px) {

  .latest-guides-section {
    margin-top: 30px;
  }

  .latest-insight-card {
    padding: 22px 20px;
    border-radius: 12px;
  }

  .latest-insight-card h3 {
    font-size: 24px;
  }

  .related-guide-section {
    margin: 34px 0;
  }

  .related-guide-card {
    padding: 22px 20px;
  }
}

/* ========================================================
   LATEST GUIDE STACK
   ======================================================== */

.latest-guides-section .latest-insight-card + .latest-insight-card {
  margin-top: 20px;
}

@media (max-width: 700px) {
  .latest-guides-section .latest-insight-card + .latest-insight-card {
    margin-top: 16px;
  }
}

/* CLASS COMPARISON MOBILE LABEL */
@media (max-width: 700px) {
  .class-comparison-table::before {
    content: "Swipe to compare Class 1–3 →";
  }
}
/* ========================================================
   GENERIC MOBILE COMPARISON TABLE
   ======================================================== */

@media (max-width: 700px) {

  /* 滑动提示始终固定在左边，不跟着横向内容消失 */
  .comparison-table-wrap::before {
    position: sticky;
    left: 0;
    display: block;
    width: max-content;
    z-index: 5;
  }

  /* 普通表格不固定第一列 */
  .comparison-table-wrap:not(.class-comparison-table)
  .comparison-table th:first-child,
  .comparison-table-wrap:not(.class-comparison-table)
  .comparison-table td:first-child {
    position: static;
    min-width: 170px;
    box-shadow: none;
  }

  /* 制造商评估表需要更宽，避免文字被挤坏 */
  .comparison-table-wrap:not(.class-comparison-table)
  .comparison-table {
    min-width: 920px;
  }

}