/* ============================================================
   GRANDECH Blog Styles
   ・ blog-main     → main.html 首頁 Blog 區塊
   ・ blog-page     → blog.html 文章列表頁
   ・ blog-post-*   → blog-post.html 文章內頁
   共用：.blog-card、.blog-filter-tab、loading/empty states
   ============================================================ */

/* ── 首頁 Blog Section ─────────────────────────────────────── */
.blog-main {
  padding: clamp(120px, 12vw, 180px) clamp(60px, 10vw, 140px);
  background: linear-gradient(180deg, rgba(230, 230, 230, 1) 0%, rgba(217, 217, 217, 1) 100%);
}

.blog-main-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  gap: clamp(40px, 5vw, 64px);
}

.blog-main-header {
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.blog-main-title {
  text-align: left !important;
  margin: 0 !important;
}

.blog-main-underline {
  width: 100%;
  max-width: clamp(240px, 35vw, 320px);
  height: 2px;
  background: rgba(17, 19, 87, 0.24);
}

.blog-main-subtitle {
  font-size: clamp(24px, 3.5vw, 32px);
  font-weight: 600;
  color: rgba(17, 19, 87, 0.9);
  margin: 0;
  letter-spacing: 0.02em;
}

.blog-main-desc {
  font-size: clamp(16px, 2.2vw, 20px);
  color: rgba(13, 13, 13, 0.68);
  line-height: 1.8;
  letter-spacing: 0.01em;
  margin: 0;
  max-width: 500px;
}

/* ── Filter Tabs ──────────────────────────────────────────── */
.blog-filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.blog-filter-tab {
  padding: 7px 20px;
  border: 1.5px solid rgba(17, 19, 87, 0.22);
  background: transparent;
  border-radius: 100px;
  font-family: 'Inter', 'Noto Sans TC', sans-serif;
  font-size: clamp(12px, 1.3vw, 13px);
  color: rgba(13, 13, 13, 0.55);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.blog-filter-tab:hover {
  border-color: #111357;
  color: #111357;
}

.blog-filter-tab.active {
  background: #111357;
  border-color: #111357;
  color: #fff;
}

/* ── Blog Grid ────────────────────────────────────────────── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(18px, 2.4vw, 28px);
}

/* ── Blog Card ────────────────────────────────────────────── */
.blog-card {
  background: rgba(255, 255, 255, 0.78);
  border-radius: 14px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(17, 19, 87, 0.07);
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.05);
  transition: transform 0.32s cubic-bezier(0.2, 0.8, 0.2, 1),
              box-shadow 0.32s ease;
  cursor: pointer;
}

.blog-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 44px rgba(17, 19, 87, 0.12);
}

.blog-card-img-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, rgba(17, 19, 87, 0.06), rgba(1, 111, 226, 0.06));
}

.blog-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.blog-card:hover .blog-card-img {
  transform: scale(1.05);
}

.blog-card-img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Krona One', sans-serif;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: rgba(17, 19, 87, 0.28);
}

.blog-card-body {
  padding: clamp(14px, 1.8vw, 20px) clamp(16px, 2vw, 22px) clamp(18px, 2.2vw, 24px);
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 9px;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
}

.blog-card-category {
  display: inline-block;
  padding: 3px 9px;
  background: rgba(17, 19, 87, 0.08);
  color: #111357;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.blog-card-date {
  font-size: 11px;
  color: rgba(13, 13, 13, 0.4);
  font-variant-numeric: tabular-nums;
}

.blog-card-title {
  font-size: clamp(13px, 1.6vw, 15px);
  font-weight: 600;
  color: #111357;
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.blog-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: auto;
  padding-top: 4px;
}

.blog-card-tag {
  font-size: 11px;
  color: #016fe2;
  line-height: 1.2;
}

/* ── Loading / Empty ──────────────────────────────────────── */
.blog-loading,
.blog-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: clamp(40px, 6vw, 72px) 0;
  color: rgba(13, 13, 13, 0.38);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.blog-loading::after {
  content: '';
  display: inline-block;
  width: 15px;
  height: 15px;
  border: 2px solid rgba(17, 19, 87, 0.18);
  border-top-color: #111357;
  border-radius: 50%;
  animation: blog-spin 0.75s linear infinite;
  flex-shrink: 0;
}

@keyframes blog-spin {
  to { transform: rotate(360deg); }
}

/* ── View-All Button ──────────────────────────────────────── */
.blog-view-all {
  display: flex;
  justify-content: center;
}

/* ── Blog List Page (blog.html) ───────────────────────────── */
.blog-page {
  min-height: 100vh;
  background: linear-gradient(180deg, rgba(223, 223, 223, 1) 0%, rgba(246, 246, 246, 1) 100%);
}

/* ── 返回首頁按鈕 ───────────────────────────────────────────── */
.blog-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: clamp(13px, 1.6vw, 15px);
  font-family: 'Inter', 'Noto Sans TC', sans-serif;
  font-weight: 500;
  color: rgba(17, 19, 87, 0.75);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.25s ease, transform 0.25s ease;
  margin-bottom: clamp(16px, 2.5vw, 24px);
}
.blog-back-btn:hover {
  color: #111357;
  transform: translateX(-4px);
}

.blog-page-hero {
  padding: clamp(140px, 17vw, 190px) clamp(60px, 10vw, 140px) clamp(48px, 6vw, 64px);
}

.blog-page-hero-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  gap: clamp(10px, 1.5vw, 16px);
}

.blog-page-hero-label {
  text-align: left !important;
  margin: 0 !important;
}

.blog-page-hero-underline {
  width: 100%;
  max-width: clamp(240px, 35vw, 320px);
  height: 2px;
  background: rgba(17, 19, 87, 0.24);
}

.blog-page-hero-sub {
  font-size: clamp(16px, 2.2vw, 20px);
  color: rgba(13, 13, 13, 0.68);
  letter-spacing: 0.01em;
  max-width: 460px;
  margin: 0;
  line-height: 1.8;
}

.blog-page-content {
  padding: 0 clamp(60px, 10vw, 140px) clamp(120px, 12vw, 180px);
}

.blog-page-content-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.blog-page-divider {
  border: none;
  border-top: 1px solid rgba(17, 19, 87, 0.14);
  margin: 0;
}

.blog-page-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(18px, 2.4vw, 28px);
}

/* ── Blog Post Page (blog-post.html) ──────────────────────── */
.blog-post-page {
  min-height: 100vh;
  background: #f5f5f5;
}

.blog-post-hero-wrap {
  background: #fff;
  padding: clamp(120px, 15vw, 156px) clamp(60px, 10vw, 140px) clamp(32px, 4vw, 48px);
}

.blog-post-hero {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

.blog-post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.blog-post-category-badge {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(17, 19, 87, 0.08);
  color: #111357;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.blog-post-date {
  font-size: 12px;
  color: rgba(13, 13, 13, 0.4);
  font-variant-numeric: tabular-nums;
}

.blog-post-title {
  font-family: 'Inter', 'Noto Sans TC', sans-serif;
  font-size: clamp(22px, 3.2vw, 36px);
  font-weight: 700;
  color: #111357;
  line-height: 1.32;
  margin: 0;
  letter-spacing: -0.01em;
}

.blog-post-hashtags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.blog-post-hashtag {
  font-size: 13px;
  color: #016fe2;
}

/* Cover image */
.blog-post-cover-wrap {
  background: #fff;
  padding: 0 0 clamp(32px, 5vw, 52px);
}

.blog-post-cover {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
}

.blog-post-cover img {
  width: 100%;
  border-radius: 0;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* Body */
.blog-post-body-wrap {
  background: #fff;
  padding: clamp(24px, 4vw, 48px) clamp(60px, 10vw, 140px) clamp(72px, 10vw, 120px);
  border-bottom: 1px solid rgba(17, 19, 87, 0.08);
}

.blog-post-body {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
}

.blog-post-author-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: clamp(18px, 2.5vw, 24px) 0;
  border-top: 1px solid rgba(17, 19, 87, 0.09);
  border-bottom: 1px solid rgba(17, 19, 87, 0.09);
  margin-bottom: clamp(24px, 3.5vw, 36px);
}

.blog-post-author-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #111357, #016fe2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.blog-post-author-info { display: grid; gap: 2px; }

.blog-post-author-name {
  font-size: 13px;
  font-weight: 600;
  color: #111357;
}

.blog-post-author-date {
  font-size: 11px;
  color: rgba(13, 13, 13, 0.42);
}

/* Article typography */
.blog-post-content {
  font-size: clamp(16px, 1.75vw, 18px);
  line-height: 2.0;
  color: rgba(13, 13, 13, 0.82);
  letter-spacing: 0.01em;
}

.blog-post-content h2 {
  font-family: 'Inter', 'Noto Sans TC', sans-serif;
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 700;
  color: #111357;
  margin: clamp(48px, 6vw, 72px) 0 clamp(12px, 1.8vw, 20px);
  padding-bottom: 12px;
  border-bottom: 1.5px solid rgba(17, 19, 87, 0.12);
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.blog-post-content h3 {
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 600;
  color: #111357;
  margin: clamp(36px, 4.5vw, 52px) 0 clamp(10px, 1.4vw, 14px);
  line-height: 1.5;
}

.blog-post-content p {
  margin: 0 0 clamp(18px, 2.4vw, 28px);
}

.blog-post-content a {
  color: #016fe2;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.blog-post-content ul,
.blog-post-content ol {
  padding-left: clamp(18px, 2.5vw, 26px);
  margin: 0 0 clamp(18px, 2.4vw, 28px);
}

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

.blog-post-content img {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 0;
  margin: clamp(36px, 5vw, 60px) 0;
  display: block;
}

.blog-post-content blockquote {
  border-left: 3px solid #111357;
  margin: clamp(28px, 4vw, 44px) 0;
  padding: clamp(10px, 1.5vw, 16px) 0 clamp(10px, 1.5vw, 16px) clamp(16px, 2.2vw, 24px);
  color: rgba(13, 13, 13, 0.62);
  font-style: normal;
  font-size: clamp(15px, 1.65vw, 17px);
  background: rgba(17, 19, 87, 0.03);
  border-radius: 0 4px 4px 0;
}

.blog-post-content strong { color: rgba(13, 13, 13, 0.92); font-weight: 700; }

/* Recent Posts */
.blog-recent-wrap {
  padding: clamp(56px, 8vw, 96px) clamp(60px, 10vw, 140px) clamp(96px, 12vw, 160px);
  background: linear-gradient(180deg, rgba(230, 230, 230, 1) 0%, rgba(217, 217, 217, 1) 100%);
}

.blog-recent-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  gap: clamp(24px, 3.5vw, 36px);
}

.blog-recent-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.blog-recent-title {
  font-family: 'Krona One', sans-serif;
  font-size: clamp(16px, 2.2vw, 22px);
  color: rgba(13, 13, 13, 0.88);
  margin: 0;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.blog-recent-link {
  font-size: 13px;
  color: #016fe2;
  text-decoration: none;
  white-space: nowrap;
  transition: opacity 0.2s;
}
.blog-recent-link:hover { opacity: 0.7; }

.blog-recent-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2.2vw, 26px);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 960px) {
  .blog-grid,
  .blog-page-grid,
  .blog-recent-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .blog-main {
    padding: clamp(80px, 10vw, 120px) clamp(24px, 6vw, 48px);
  }
  .blog-page-hero {
    padding: clamp(120px, 14vw, 160px) clamp(24px, 6vw, 48px) clamp(32px, 5vw, 48px);
  }
  .blog-page-content {
    padding: 0 clamp(24px, 6vw, 48px) clamp(80px, 10vw, 120px);
  }
  .blog-post-hero-wrap,
  .blog-post-cover-wrap,
  .blog-post-body-wrap,
  .blog-recent-wrap {
    padding-left: clamp(24px, 6vw, 48px);
    padding-right: clamp(24px, 6vw, 48px);
  }
}

@media (max-width: 600px) {
  .blog-grid,
  .blog-page-grid,
  .blog-recent-grid {
    grid-template-columns: 1fr;
  }
  .blog-post-title {
    font-size: clamp(20px, 5.5vw, 28px);
  }
}