/* ========== 공통 레이아웃 ========== */
.eco-newsletter {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 48px;
  box-sizing: border-box;
  font-family: "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
    "Malgun Gothic", system-ui, sans-serif;
  color: #222;
  background-color: #f4f6fb;
}

.eco-newsletter * {
  box-sizing: border-box;
}

.eco-newsletter h2,
.eco-newsletter h3 {
  margin: 0;
}

/* ========== 상단 헤더 ========== */
.eco-news-header {
  position: relative;
  padding: 32px 24px 40px;
  margin-bottom: 32px;
  border-radius: 16px;
  background: radial-gradient(circle at right top, #f2a45b 0, #22447a 40%, #122347 100%);
  color: #fff;
  overflow: hidden;
}

.eco-news-vol {
  position: absolute;
  left: 24px;
  top: 20px;
  font-size: 12px;
  line-height: 1.4;
  opacity: 0.9;
}

.eco-news-vol strong {
  display: block;
  font-size: 13px;
}

.eco-news-tagline {
  text-align: center;
  font-size: 14px;
  margin-bottom: 8px;
  opacity: 0.9;
}

.eco-news-title {
  text-align: center;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.eco-news-title span {
  display: block;
  font-size: 18px;
  font-weight: 500;
}

/* ========== 공통 섹션 스타일 ========== */
.eco-news-section {
  margin-bottom: 32px;
}

.eco-news-section-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-left: 20px;
  position: relative;
  color: #143764;
}

.eco-news-section-title::before {
  content: "▶";
  position: absolute;
  left: 0;
  top: 0;
  font-size: 14px;
  color: #ff7c3a;
}

/* ========== 공지 영역 ========== */
.eco-news-announcements-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.eco-news-card {
  background-color: #fff;
  border-radius: 16px;
  padding: 18px 16px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.06);
}

.eco-news-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 10px;
  text-align: center;
}

.eco-news-card p {
  font-size: 13px;
  line-height: 1.5;
  margin: 2px 0;
}

.eco-news-card ul {
  margin: 6px 0 0;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.5;
}

.eco-news-card ul li {
  margin-bottom: 2px;
}

/* ========== 주요활동 카드 ========== */
.eco-news-activities-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.eco-news-activity {
  background-color: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 10px rgba(0,0,0,0.06);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.eco-news-activity-thumb {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 */
  overflow: hidden;
  background-color: #d8dfea;
}

.eco-news-activity-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.eco-news-activity-body {
  padding: 10px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.eco-news-activity-title {
  font-size: 14px;
  font-weight: 600;
  min-height: 40px;
}

.eco-news-activity-meta {
  font-size: 12px;
  color: #666;
}

.eco-news-activity-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 6px;
  font-size: 12px;
}

.eco-news-activity-date {
  color: #444;
}

.eco-news-activity-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 999px;
  border: none;
  background-color: #143764;
  color: #fff;
  font-size: 11px;
  text-decoration: none;
  white-space: nowrap;
}

.eco-news-activity-btn::after {
  content: "≫";
  font-size: 11px;
}

/* ========== 3단 리스트 영역 ========== */
.eco-news-3col-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.eco-news-list-card {
  background-color: #e5f1ff;
  border-radius: 16px;
  padding: 16px 16px 18px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.eco-news-list-card-title {
  font-size: 14px;
  font-weight: 700;
  color: #143764;
  margin-bottom: 8px;
}

.eco-news-list {
  list-style: disc;
  padding-left: 18px;
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
}

.eco-news-list li + li {
  margin-top: 4px;
}

/* ========== 연구원 보유장비 소개 ========== */
.eco-news-equipment {
  background-color: #fff;
  border-radius: 16px;
  padding: 18px 18px 20px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.06);
}

.eco-news-equipment-inner {
  display: grid;
  grid-template-columns: 1.1fr 1.4fr;
  gap: 16px;
  align-items: flex-start;
}

.eco-news-equipment-thumb {
  background-color: #dbe3f4;
  border-radius: 12px;
  padding: 12px;
  text-align: center;
}

.eco-news-equipment-thumb img {
  max-width: 100%;
  height: auto;
}

.eco-news-equipment-info h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
}

.eco-news-equipment-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.eco-news-equipment-table th,
.eco-news-equipment-table td {
  padding: 3px 4px;
  vertical-align: top;
}

.eco-news-equipment-table th {
  width: 70px;
  font-weight: 600;
  color: #143764;
}

/* ========== 하단 미션/비전 & 푸터 ========== */
.eco-news-bottom {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 2fr 1.4fr;
  gap: 16px;
  align-items: stretch;
}

.eco-news-footer-left {
  background-color: #143764;
  color: #fff;
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.eco-news-footer-left-logo {
  font-weight: 700;
  font-size: 13px;
}

.eco-news-footer-left-small {
  font-size: 11px;
  opacity: 0.9;
}

.eco-news-mission {
  background-color: #ffffff;
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.eco-news-mission-title {
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 6px;
}

.eco-news-mission-box {
  margin-bottom: 8px;
  padding: 8px 10px;
  border-radius: 8px;
  background-color: #143764;
  color: #fff;
}

.eco-news-mission-box.eco-vision {
  background-color: #225ea4;
}

.eco-news-sns {
  margin-top: 8px;
  font-size: 11px;
}

.eco-news-sns span {
  font-weight: 600;
  margin-right: 4px;
}

/* ========== 반응형 ========== */
@media (max-width: 900px) {
  .eco-news-announcements-grid,
  .eco-news-activities-grid,
  .eco-news-3col-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .eco-news-equipment-inner {
    grid-template-columns: 1fr;
  }

  .eco-news-bottom {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .eco-newsletter {
    padding: 16px 10px 32px;
  }

  .eco-news-header {
    padding: 28px 18px 32px;
  }

  .eco-news-title {
    font-size: 20px;
  }

  .eco-news-title span {
    font-size: 15px;
  }

  .eco-news-announcements-grid,
  .eco-news-activities-grid,
  .eco-news-3col-grid {
    grid-template-columns: 1fr;
  }

  .eco-news-section-title {
    font-size: 16px;
  }
}