/* ===== 页面专属：文章中心 (page-news) ===== */
.page-news {
  --color-bg-dark: #0B1026;
  --color-bg-medium: #151A3A;
  --color-bg-light: #1E2450;
  --color-primary: #FF6600;
  --color-primary-hover: #FF8533;
  --color-primary-dim: #CC5200;
  --color-purple: #8B5CF6;
  --color-accent-gradient: linear-gradient(135deg, #8B5CF6, #FF6600);
  --color-white: #FFFFFF;
  --color-text-primary: #E5E7EB;
  --color-text-secondary: #9CA3AF;
  --color-text-muted: #6B7280;
  --color-success: #10B981;
  --color-error: #EF4444;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-accent: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --max-w: 1200px;
  --gap-sm: 8px;
  --gap-md: 16px;
  --gap-lg: 32px;
  --gap-xl: 64px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --transition-fast: 0.2s ease;
  --transition-med: 0.35s ease;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.5);
  --header-h: 64px;

  background-color: var(--color-bg-dark);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

/* 背景纹理 —— 深蓝网格 */
.page-news::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(139, 92, 246, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 92, 246, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

.max-w {
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gap-md);
  padding-right: var(--gap-md);
  position: relative;
  z-index: 1;
}

/* ===== 杂志封面首屏 ===== */
.news-hero {
  position: relative;
  z-index: 1;
  margin-bottom: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), 0 100%);
}

.news-hero__bg {
  position: relative;
  height: 360px;
  overflow: hidden;
}

.news-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.news-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
      rgba(11, 16, 38, 0.85) 0%,
      rgba(11, 16, 38, 0.50) 50%,
      rgba(139, 92, 246, 0.25) 100%);
  z-index: 1;
}

.news-hero__content {
  position: absolute;
  bottom: var(--gap-lg);
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--max-w);
  z-index: 2;
  padding: 0 var(--gap-md);
}

.news-hero__title {
  font-family: var(--font-accent);
  font-size: clamp(1.75rem, 5vw, 3.2rem);
  font-weight: 700;
  color: var(--color-white);
  margin: var(--gap-sm) 0;
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.6);
  position: relative;
  display: inline-block;
}

.news-hero__title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 80px;
  height: 4px;
  background: var(--color-accent-gradient);
  border-radius: 2px;
}

.news-hero__lead {
  font-size: clamp(0.95rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  margin: var(--gap-md) 0 var(--gap-sm);
  max-width: 600px;
  font-weight: 400;
}

.news-hero__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: var(--gap-md);
}

.news-hero__breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.news-hero__breadcrumb a:hover,
.news-hero__breadcrumb a:focus-visible {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--color-text-muted);
  font-weight: 300;
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  background: var(--color-bg-light);
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  line-height: 1.4;
}

.tag-version {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(255, 102, 0, 0.08);
}

.tag-err {
  border-color: var(--color-error);
  color: var(--color-error);
  background: rgba(239, 68, 68, 0.08);
}

.tag-ok {
  border-color: var(--color-success);
  color: var(--color-success);
  background: rgba(16, 185, 129, 0.08);
}

/* ===== 两栏布局：分类 + 文章 ===== */
.news-layout {
  display: flex;
  flex-direction: column;
  gap: var(--gap-lg);
  padding-top: var(--gap-xl);
  padding-bottom: var(--gap-lg);
}

/* 侧边分类导航 */
.news-categories {
  flex-shrink: 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 800;
  color: var(--color-white);
  margin: 0 0 var(--gap-md);
  letter-spacing: -0.01em;
  position: relative;
  padding-left: var(--gap-md);
  display: flex;
  align-items: center;
}

.section-title::before {
  content: '';
  width: 4px;
  height: 1.2em;
  background: var(--color-accent-gradient);
  border-radius: 2px;
  margin-right: var(--gap-sm);
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
}

.section-title--center {
  justify-content: center;
  padding-left: 0;
}

.section-title--center::before {
  display: none;
}

.cat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-sm);
}

.cat-btn {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  padding: var(--gap-sm) var(--gap-md);
  background: var(--color-bg-medium);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-med);
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.cat-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-med);
  z-index: 0;
}

.cat-btn:hover,
.cat-btn:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(255, 102, 0, 0.15);
}

.cat-btn.is-active {
  border-color: var(--color-primary);
  color: var(--color-white);
  background: var(--color-bg-light);
  box-shadow: 0 0 0 1px var(--color-primary), 0 4px 20px rgba(255, 102, 0, 0.12);
}

.cat-btn.is-active::before {
  opacity: 0.08;
}

.cat-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cat-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cat-label {
  position: relative;
  z-index: 1;
}

.cat-hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin: var(--gap-sm) 0 0;
  display: none;
}

/* 文章网格 */
.news-main {
  flex: 1;
  min-width: 0;
}

.article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-md);
}

.card {
  background: var(--color-bg-medium);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-med);
  position: relative;
}

.card:hover,
.card:focus-within {
  border-color: rgba(255, 102, 0, 0.25);
  box-shadow: 0 8px 32px rgba(255, 102, 0, 0.08);
  transform: translateY(-3px);
}

/* 文章卡片 */
.article-card {
  display: flex;
  flex-direction: column;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.article-card--tall {
  grid-row: span 1;
}

@media (min-width: 768px) {
  .article-card--tall {
    grid-row: span 2;
  }

  .article-card--tall .article-card__body {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .article-card--wide {
    grid-column: span 2;
  }

  .article-card--wide .article-card__body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap-md);
  }

  .article-card--wide .article-card__summary {
    grid-column: 1 / -1;
  }

  .article-card--wide .article-card__more {
    grid-column: 1 / -1;
  }
}

.article-card__img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 2 / 1;
  background: var(--color-bg-dark);
}

.article-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-med);
}

.article-card:hover .article-card__img,
.article-card:focus-within .article-card__img {
  transform: scale(1.04);
}

.article-card__body {
  padding: var(--gap-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-sm);
  margin-bottom: var(--gap-sm);
}

.article-card__title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-white);
  margin: 0 0 var(--gap-sm);
  line-height: 1.3;
}

.article-card__link {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.article-card__link::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
}

.article-card__link:hover,
.article-card__link:focus-visible {
  color: var(--color-primary);
}

.article-card__summary {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0 0 var(--gap-sm);
  flex: 1;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card__more {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  position: relative;
  z-index: 2;
  align-self: flex-start;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-card__more:hover,
.article-card__more:focus-visible {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* ===== 推荐文章区 ===== */
.news-recommended {
  padding-top: var(--gap-lg);
  padding-bottom: var(--gap-xl);
  position: relative;
  z-index: 1;
}

.rec-header {
  text-align: center;
  margin-bottom: var(--gap-lg);
}

.rec-subtitle {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin: var(--gap-sm) 0 0;
}

.rec-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-md);
}

.rec-card {
  display: flex;
  flex-direction: column;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  position: relative;
  background: var(--color-bg-medium);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--transition-med);
}

.rec-card:hover,
.rec-card:focus-within {
  border-color: rgba(255, 102, 0, 0.3);
  box-shadow: 0 12px 40px rgba(255, 102, 0, 0.10);
  transform: translateY(-4px);
}

.rec-card--primary {
  border-color: rgba(255, 102, 0, 0.15);
  background: linear-gradient(135deg, rgba(255, 102, 0, 0.06), var(--color-bg-medium) 60%);
}

.rec-card--primary .rec-card__title {
  color: var(--color-primary);
}

.rec-card__badge {
  position: absolute;
  top: var(--gap-sm);
  right: var(--gap-sm);
  z-index: 3;
  padding: 2px 12px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-white);
  background: var(--color-accent-gradient);
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 12px rgba(255, 102, 0, 0.25);
}

.rec-card__img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 2 / 1;
  background: var(--color-bg-dark);
}

.rec-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-med);
}

.rec-card:hover .rec-card__img,
.rec-card:focus-within .rec-card__img {
  transform: scale(1.04);
}

.rec-card__body {
  padding: var(--gap-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.rec-card__body .tag {
  align-self: flex-start;
  margin-bottom: var(--gap-sm);
}

.rec-card__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
  margin: 0 0 var(--gap-sm);
  line-height: 1.3;
}

.rec-card__summary {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0 0 var(--gap-md);
  flex: 1;
  line-height: 1.55;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-med);
  border: 1px solid transparent;
  align-self: flex-start;
  position: relative;
  z-index: 2;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 0 100%);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 4px 20px rgba(255, 102, 0, 0.25);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background: rgba(255, 102, 0, 0.08);
  border-color: var(--color-primary-hover);
  color: var(--color-primary-hover);
  box-shadow: 0 4px 16px rgba(255, 102, 0, 0.12);
  transform: translateY(-1px);
}

/* ===== 信任声明 ===== */
.trust-statement {
  padding: var(--gap-md);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: var(--gap-lg);
  margin-bottom: var(--gap-md);
}

.trust-statement p {
  margin: 0;
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .cat-hint {
    display: block;
  }

  .rec-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .rec-card--primary {
    grid-column: 1 / -1;
    flex-direction: row;
  }

  .rec-card--primary .rec-card__img-wrap {
    width: 40%;
    aspect-ratio: auto;
    min-height: 220px;
  }

  .rec-card--primary .rec-card__body {
    width: 60%;
  }
}

@media (min-width: 900px) {
  .news-hero__bg {
    height: 420px;
  }

  .news-hero__content {
    bottom: var(--gap-xl);
  }

  .news-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--gap-xl);
  }

  .news-categories {
    width: 240px;
    position: sticky;
    top: calc(var(--header-h) + var(--gap-md));
  }

  .cat-list {
    flex-direction: column;
  }

  .cat-btn {
    width: 100%;
  }

  .article-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: auto;
  }

  .rec-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .rec-card--primary {
    grid-column: auto;
    flex-direction: column;
  }

  .rec-card--primary .rec-card__img-wrap {
    width: 100%;
    aspect-ratio: 2 / 1;
    min-height: auto;
  }

  .rec-card--primary .rec-card__body {
    width: 100%;
  }
}

@media (min-width: 1200px) {
  .article-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .article-card--wide {
    grid-column: span 3;
    flex-direction: row;
  }

  .article-card--wide .article-card__img-wrap {
    width: 35%;
    aspect-ratio: auto;
    min-height: 200px;
  }

  .article-card--wide .article-card__body {
    width: 65%;
    grid-template-columns: 1fr 1fr;
  }

  .article-card--tall {
    grid-row: span 2;
  }

  .rec-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===== 焦点与交互 ===== */
.page-news a:focus-visible,
.page-news button:focus-visible,
.page-news .btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.page-news .card:focus-within {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(255, 102, 0, 0.15);
}

/* ===== 键盘焦点高亮 ===== */
.page-news [data-filter]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== 减少运动 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-news *,
  .page-news *::before,
  .page-news *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .article-card:hover .article-card__img,
  .rec-card:hover .rec-card__img {
    transform: none;
  }

  .card:hover,
  .rec-card:hover {
    transform: none;
  }
}