/*
 * 角色：博客 hub 入口页专属样式
 * 规则：只写此页面特有组件，Token 全部引用 Global.css 变量
 * 禁止：不得定义 :root{}，不得写死颜色/间距数值
 */

/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   BLOG HERO
   ============================================================ */

.blog-hero {
  padding: var(--sp-8) var(--sp-5) var(--sp-6);
}

.blog-hero__inner {
  max-width: 680px;
}

.blog-hero__title {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin: 0;
  text-wrap: pretty;
}

.blog-hero__title em {
  font-style: normal;
  color: rgba(255, 255, 255, 0.38);
}

/* ============================================================
   BLOG LIST SECTION
   ============================================================ */

.blog-list {
  padding: var(--sp-6) var(--sp-5) var(--sp-7);
}

/* ============================================================
   FILTER TABS
   ============================================================ */

.blog-filter {
  display: flex;
  gap: var(--sp-1);
  flex-wrap: wrap;
  margin-bottom: var(--sp-5);
  border-bottom: 1px solid var(--gray-100);
  padding-bottom: var(--sp-3);
}

.blog-filter__btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  background: transparent;
  border: 1px solid var(--gray-100);
  border-radius: 100px;
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--gray-600);
  cursor: pointer;
  transition: all 0.2s ease;
}

.blog-filter__btn:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-subtle);
}

.blog-filter__btn--active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.blog-filter__btn--active:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
  color: #fff;
}

.blog-filter__btn:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* ============================================================
   ARTICLE GRID
   ============================================================ */

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
}

/* ============================================================
   BLOG CARD
   ============================================================ */

.blog-card {
  background: #fff;
  border: 1px solid var(--gray-100);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: rgba(215, 25, 32, 0.20);
}

/* Thumbnail */
.blog-card__img-wrap {
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--gray-50);
}

.blog-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.blog-card:hover .blog-card__img {
  transform: scale(1.04);
}

.blog-card__img-placeholder {
  width: 100%;
  height: 100%;
  background:
    repeating-linear-gradient(
      45deg,
      var(--gray-50),
      var(--gray-50) 8px,
      var(--gray-100) 8px,
      var(--gray-100) 16px
    );
}

/* Card Body */
.blog-card__body {
  padding: var(--sp-3);
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--sp-1);
}

/* Category Tag */
.blog-card__cat {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--r-sm);
  text-decoration: none;
  width: fit-content;
  transition: opacity 0.2s;
}

.blog-card__cat:hover {
  opacity: 0.80;
}

.blog-card__cat--buyers-guide {
  background: var(--brand-tint);
  color: var(--brand);
}

.blog-card__cat--technical-articles {
  background: var(--green-bg);
  color: var(--green-fg);
}

/* Title */
.blog-card__title {
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--gray-800);
  line-height: 1.35;
  margin: 0;
  text-wrap: pretty;
}

.blog-card__title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

.blog-card__title a:hover {
  color: var(--brand);
}

.blog-card__title a:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* Excerpt */
.blog-card__excerpt {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: 1.65;
  margin: 0;
  flex: 1;
}

/* Meta Row */
.blog-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--sp-2);
  border-top: 1px solid var(--gray-100);
}

.blog-card__date {
  font-size: var(--text-xs);
  color: var(--gray-400);
  font-family: 'DM Mono', monospace;
}

.blog-card__read-more {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--brand);
  text-decoration: none;
  transition: gap 0.2s ease;
}

.blog-card__read-more:hover {
  gap: 8px;
}

.blog-card__read-more:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* Empty State */
.blog-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--gray-400);
  font-size: var(--text-base);
  padding: var(--sp-7) 0;
}

/* ============================================================
   PAGINATION
   ============================================================ */

.blog-pagination {
  display: flex;
  justify-content: center;
  gap: var(--sp-1);
  margin-top: var(--sp-6);
  flex-wrap: wrap;
}

.blog-pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--sp-2);
  border: 1px solid var(--gray-100);
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--gray-600);
  text-decoration: none;
  transition: all 0.2s ease;
  background: #fff;
}

.blog-pagination .page-numbers:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-subtle);
}

.blog-pagination .page-numbers.current {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.blog-pagination .page-numbers:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* ============================================================
   BLOG CTA BANNER
   ============================================================ */

.blog-cta {
  padding: var(--sp-7) var(--sp-5);
}

.blog-cta__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  flex-wrap: wrap;
}

.blog-cta__text h2 {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  color: #fff;
  margin: 0 0 var(--sp-2);
  text-wrap: pretty;
}

.blog-cta__text p {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.65;
  max-width: 520px;
  margin: 0;
}

.blog-cta__actions {
  display: flex;
  gap: var(--sp-2);
  flex-shrink: 0;
  flex-wrap: wrap;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 960px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .blog-cta__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 600px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }

  .blog-filter {
    gap: var(--sp-1);
  }

  .blog-cta__actions {
    flex-direction: column;
    width: 100%;
  }

  .blog-cta__actions .btn {
    width: 100%;
    justify-content: center;
  }
}