/* ==========================================================================
   技术文章：列表卡片 + 正文排版
   依赖 main.css 的设计变量，仅在文章页加载
   ========================================================================== */

/* ---------- 列表 ---------- */
.art-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin-top: 8px;
}

.art-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.art-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(14, 42, 71, 0.08);
  text-decoration: none;
}

.art-card__img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--bg-soft);
}

.art-card__img--none {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--blue-600);
}

.art-card__body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  padding: 20px 22px 24px;
}

.art-card__date {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-500);
}

.art-card__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--navy-900);
}

.art-card__sum {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--ink-500);
}

.art-card__more {
  margin-top: auto;
  padding-top: 10px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue-600);
}

/* ---------- 详情 ---------- */
.art {
  max-width: 760px;
  margin: 0;
}

.art-cover {
  margin: 0 0 36px;
  border-radius: 14px;
  overflow: hidden;
}

.art-cover img {
  display: block;
  width: 100%;
  height: auto;
}

.art-meta {
  margin: 12px 0 0;
  font-size: 0.875rem;
  color: var(--ink-500);
}

.art-body {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--ink-500);
}

.art-body > :first-child {
  margin-top: 0;
}

.art-body h2 {
  margin: 44px 0 14px;
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--navy-900);
}

.art-body h3 {
  margin: 32px 0 10px;
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--navy-900);
}

.art-body p {
  margin: 14px 0;
}

.art-body ul,
.art-body ol {
  margin: 14px 0;
  padding-left: 1.5em;
}

.art-body ul {
  list-style: disc;
}

.art-body ol {
  list-style: decimal;
}

.art-body li {
  margin: 6px 0;
  display: list-item;
}

.art-body img {
  max-width: 100%;
  height: auto;
  margin: 18px 0;
  border-radius: 10px;
}

.art-body a {
  color: var(--blue-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.art-body a:hover {
  color: var(--navy-900);
}

.art-body blockquote {
  margin: 22px 0;
  padding: 12px 20px;
  background: var(--bg-soft);
  border-left: 3px solid var(--blue-600);
  border-radius: 0 10px 10px 0;
  color: var(--ink-500);
}

.art-body table {
  width: 100%;
  margin: 22px 0;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.art-body th,
.art-body td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  text-align: left;
}

.art-body th {
  background: var(--bg-soft);
  color: var(--navy-900);
  font-weight: 600;
}

.art-cta {
  margin-top: 56px;
  padding: 32px 34px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 16px;
}

.art-cta .btn {
  margin-top: 20px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .art-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .art-list {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .art-body {
    font-size: 1rem;
  }

  .art-cta {
    padding: 24px;
  }
}