/* pages/gas-analyzer.css — 氣體分析儀（CEMS／VOCs／選型指引，共用） */
:root {
  --brand: #0a5bb5;
  --brand-ink: #0b2545;
  --accent: #f08a24;
  --teal: #1593a6;
  --green: #4f8f1f;
  --line: #e2e8f0;
  --text: #334155;
  --muted: #64748b;
}

/* ===== 版面 ===== */
.gas-analyzer-body {
  background: linear-gradient(180deg, #eef4fa 0%, #f6f9fc 320px, #f6f9fc 100%);
  color: var(--text);
  padding-bottom: 1px;
}

.gas-analyzer-body .breadcrumb {
  max-width: 1200px;
  width: calc(100% - 2rem);
  margin: 87px auto 0;
  box-sizing: border-box;
  background: transparent;
  box-shadow: none;
  padding: 1.1rem 0 0.4rem;
}

.gas-analyzer-container {
  max-width: 1200px;
  width: calc(100% - 2rem);
  box-sizing: border-box;
  margin: 0.8rem auto 3.5rem;
  padding: 2.4rem 2.6rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 6px 24px rgba(15, 40, 80, 0.07);
  line-height: 1.8;
}

.tabs-container h1 {
  margin: 0 0 1.2rem;
  font-size: 1.75rem;
  color: var(--brand-ink);
}

.tabs-container h1 i {
  color: var(--brand);
}

.tabs-container > p {
  margin: 0 0 1.8rem;
  padding: 1.1rem 1.4rem;
  border-radius: 10px;
  background: #f3f8fe;
  border: 1px solid #dbe8f6;
}

.gas-analyzer-container strong {
  color: var(--brand);
}

/* ===== 頁籤 ===== */
.gas-analyzer-body .tabs-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  padding: 0.4rem;
  border-radius: 14px;
  background: #eef3f9;
}

.gas-analyzer-body .tab-btn {
  display: block;
  width: auto;
  padding: 0.75rem 1rem;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.45;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.gas-analyzer-body .tab-btn:hover {
  background: #fff;
  color: var(--brand);
}

.gas-analyzer-body .tab-btn.active {
  background: linear-gradient(135deg, #1a6fd0, var(--brand));
  color: #fff;
  box-shadow: 0 6px 16px rgba(10, 91, 181, 0.25);
}

.gas-analyzer-body .tab-content {
  display: none;
  padding-top: 2rem;
  margin-top: 0;
}

.gas-analyzer-body .tab-content.active {
  display: block;
}

.tab-content > h2,
.gas-guide-container > h2 {
  margin: 0 0 0.8rem;
  padding-left: 0.8rem;
  border-left: 4px solid var(--brand);
  font-size: 1.4rem;
  line-height: 1.5;
  color: var(--brand-ink);
}

.tab-content > h3,
.applications > h3 {
  margin: 1.8rem 0 0.6rem;
  font-size: 1.2rem;
  color: var(--brand-ink);
}

.tab-content h4 {
  margin: 1rem 0 0.3rem;
  font-size: 1.05rem;
  color: var(--brand);
}

.tab-content p {
  margin: 0 0 1rem;
}

.tab-content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

/* ===== 卡片（CEMS） ===== */
.card {
  margin: 1.6rem 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 4px 16px rgba(15, 40, 80, 0.05);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1rem 1.4rem;
  background: linear-gradient(90deg, #f3f8fe 0%, #fff 100%);
  border-bottom: 1px solid var(--line);
}

.card-header > i {
  flex: none;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  font-size: 1.15rem;
  color: #fff;
  background: linear-gradient(135deg, #3fa2f5, var(--brand));
}

.card + .card .card-header > i {
  background: linear-gradient(135deg, #5fd6df, var(--teal));
}

.card-header h2 {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.5;
  color: var(--brand-ink);
}

.card-body {
  padding: 1.4rem;
}

.card-body img {
  border-radius: 10px;
}

/* ===== VOCs ===== */
.vocs-image-container {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
  margin: 1.2rem 0;
}

.vocs-image-container img,
.tab-content > img,
.fid-diagram img,
.fid-structure img {
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-sizing: border-box;
}

.vocs-image-container img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.fid-container {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 1.4rem;
  margin-top: 1.6rem;
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f7fafd;
}

.fid-left {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.fid-text h4 {
  margin-top: 0;
}

.fid-text p {
  margin: 0;
}

.fid-structure {
  display: grid;
  place-items: center;
}

/* ===== 選型指引表格 ===== */
.gas-guide-container {
  overflow-x: auto;
}

.gas-guide {
  width: 100%;
  min-width: 600px;
  margin: 1rem 0 0.5rem;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  font-size: 0.93rem;
}

.gas-guide th {
  padding: 0.8rem 1rem;
  text-align: left;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(90deg, #0b4f9c, var(--brand));
}

.gas-guide td {
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--line);
}

.gas-guide tbody tr:nth-child(even) {
  background: #f7fafd;
}

.gas-guide tbody tr:hover {
  background: #eef5fd;
}

.gas-guide td:first-child {
  font-family: Consolas, "Courier New", monospace;
  font-weight: 600;
  color: var(--brand-ink);
  white-space: nowrap;
}

/* ===== 應用領域 ===== */
.applications ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 0.7rem;
}

.applications li {
  position: relative;
  padding: 0.75rem 1rem 0.75rem 2.6rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  line-height: 1.6;
}

.applications li::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 1.05rem;
  width: 1.05rem;
  height: 1.05rem;
  border-radius: 50%;
  background: #e8f1fc url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%230a5bb5' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 8.3l2.6 2.5L12 5.4'/%3E%3C/svg%3E") no-repeat center / 70%;
}

/* ===== 相關產品 ===== */
.related-products {
  margin-top: 2.2rem;
  padding: 1.2rem 1.4rem;
  background: #f5f8ff;
  border-radius: 12px;
}

.related-products h3 {
  margin: 0;
  color: var(--brand-ink);
}

.related-products ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
}

.related-products a {
  display: block;
  padding: 0.55rem 1.2rem;
  background: var(--brand);
  color: #fff;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.related-products a:hover {
  background: #0b4f9c;
  transform: translateY(-2px);
  color: #fdf583;
}

/* ===== 響應式 ===== */
@media (max-width: 900px) {
  .fid-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .gas-analyzer-container {
    width: calc(100% - 1.2rem);
    padding: 1.4rem 1.1rem;
  }

  .tabs-container h1 {
    font-size: 1.4rem;
  }

  .gas-analyzer-body .tabs-nav {
    gap: 0.3rem;
  }

  .gas-analyzer-body .tab-btn {
    padding: 0.6rem 0.4rem;
    font-size: 0.88rem;
  }

  .vocs-image-container {
    grid-template-columns: 1fr;
  }

  .card-body,
  .fid-container {
    padding: 1rem;
  }

  .applications ul {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .gas-analyzer-body .breadcrumb {
    margin-top: 70px;
  }
}