/* ========================================
   page-news 文章中心 页面专属样式
   作用域限定 .page-news
   移动端优先 + 桌面媒体查询
   ======================================== */

/* ---- 设计令牌（作用域内） ---- */
.page-news {
  --news-clr-tab-expert: #FF6F00;
  --news-clr-tab-tutorial: #4A90D9;
  --news-clr-tab-brand: #C5A55A;
  --news-card-radius: 12px;
  --news-progress-width: 6px;
  --news-tab-transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --news-card-gap: 1.5rem;
}

/* ---- 面包屑 ---- */
.page-news .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0 0.5rem;
  font-size: var(--fs-small, 0.875rem);
  color: var(--clr-secondary2, #C5A55A);
}

.page-news .breadcrumb a {
  color: var(--clr-secondary1, #4A90D9);
  text-decoration: none;
  transition: color var(--transition, 0.3s ease);
}

.page-news .breadcrumb a:hover,
.page-news .breadcrumb a:focus-visible {
  color: var(--clr-accent, #FF6F00);
  text-decoration: underline;
}

.page-news .breadcrumb-sep {
  color: var(--clr-neutral3, #EAEAEA);
  opacity: 0.5;
}

.page-news .breadcrumb-current {
  color: var(--clr-text-light, #FFFFFF);
  font-weight: 600;
}

/* ---- 页面标题区 ---- */
.page-news .page-header {
  padding: 1.5rem 0 2rem;
  border-bottom: 2px solid var(--clr-neutral2, #2C3E5A);
  margin-bottom: 2rem;
}

.page-news .page-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 2.8rem;
  line-height: 1.1;
  color: var(--clr-text-light, #FFFFFF);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  position: relative;
  display: inline-block;
}

.page-news .page-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--clr-accent, #FF6F00);
  margin-top: 0.5rem;
  border-radius: 2px;
}

.page-news .page-subtitle {
  font-family: var(--font-body, 'Segoe UI', Roboto, sans-serif);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--clr-neutral3, #EAEAEA);
  max-width: 680px;
  margin: 0.5rem 0 0;
}

/* ---- 标签容器 ---- */
.page-news .tabs-container {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

/* ---- 隐藏 radio input ---- */
.page-news .tab-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* ---- 标签导航（移动端：横向滚动） ---- */
.page-news .tab-labels-wrapper {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  gap: 0.5rem;
  padding: 0 0 0.75rem;
  scrollbar-width: thin;
  scrollbar-color: var(--clr-accent, #FF6F00) var(--clr-neutral2, #2C3E5A);
  -webkit-overflow-scrolling: touch;
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--clr-primary, #0A1F44);
}

.page-news .tab-labels-wrapper::-webkit-scrollbar {
  height: 4px;
}

.page-news .tab-labels-wrapper::-webkit-scrollbar-track {
  background: var(--clr-neutral2, #2C3E5A);
  border-radius: 2px;
}

.page-news .tab-labels-wrapper::-webkit-scrollbar-thumb {
  background: var(--clr-accent, #FF6F00);
  border-radius: 2px;
}

/* ---- 单个标签 ---- */
.page-news .tab-label {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--clr-neutral3, #EAEAEA);
  background: var(--clr-neutral1, #1A2A4A);
  padding: 0.7rem 1.5rem 0.7rem 1.2rem;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background var(--news-tab-transition), color var(--news-tab-transition), box-shadow var(--news-tab-transition);
  position: relative;
  border-left: 4px solid transparent;
  user-select: none;
}

/* 标签彩色装饰线（伪元素） */
.page-news .tab-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  bottom: 20%;
  width: 4px;
  border-radius: 2px;
  transition: background var(--news-tab-transition);
}

/* 各标签颜色 */
.page-news .tab-label[data-tab="expert"]::before {
  background: var(--news-clr-tab-expert, #FF6F00);
}

.page-news .tab-label[data-tab="tutorial"]::before {
  background: var(--news-clr-tab-tutorial, #4A90D9);
}

.page-news .tab-label[data-tab="brand"]::before {
  background: var(--news-clr-tab-brand, #C5A55A);
}

/* 标签悬停 */
.page-news .tab-label:hover {
  background: var(--clr-neutral2, #2C3E5A);
  color: var(--clr-text-light, #FFFFFF);
}

/* 选中态：通过 radio :checked 驱动 */
.page-news #tab-expert:checked ~ .tab-labels-wrapper label[for="tab-expert"],
.page-news #tab-tutorial:checked ~ .tab-labels-wrapper label[for="tab-tutorial"],
.page-news #tab-brand:checked ~ .tab-labels-wrapper label[for="tab-brand"] {
  background: var(--clr-neutral2, #2C3E5A);
  color: var(--clr-text-light, #FFFFFF);
  box-shadow: 0 0 0 1px var(--clr-accent, #FF6F00), 0 4px 16px rgba(255, 111, 0, 0.18);
}

.page-news #tab-expert:checked ~ .tab-labels-wrapper label[for="tab-expert"]::before {
  background: var(--news-clr-tab-expert, #FF6F00);
  box-shadow: 0 0 8px var(--news-clr-tab-expert, #FF6F00);
}

.page-news #tab-tutorial:checked ~ .tab-labels-wrapper label[for="tab-tutorial"]::before {
  background: var(--news-clr-tab-tutorial, #4A90D9);
  box-shadow: 0 0 8px var(--news-clr-tab-tutorial, #4A90D9);
}

.page-news #tab-brand:checked ~ .tab-labels-wrapper label[for="tab-brand"]::before {
  background: var(--news-clr-tab-brand, #C5A55A);
  box-shadow: 0 0 8px var(--news-clr-tab-brand, #C5A55A);
}

/* ---- 面板容器 ---- */
.page-news .tab-panels {
  position: relative;
  min-height: 320px;
}

/* ---- 单个面板（默认隐藏，radio 控制显示） ---- */
.page-news .tab-panel {
  visibility: hidden;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: visibility 0.45s ease, opacity 0.45s ease, max-height 0.55s ease;
  margin: 0;
}

/* 选中面板显示 */
.page-news #tab-expert:checked ~ .tab-panels #panel-expert,
.page-news #tab-tutorial:checked ~ .tab-panels #panel-tutorial,
.page-news #tab-brand:checked ~ .tab-panels #panel-brand {
  visibility: visible;
  opacity: 1;
  max-height: 6000px;
  overflow: visible;
}

/* ---- 卡片网格 ---- */
.page-news .card-grid {
  display: flex;
  flex-direction: column;
  gap: var(--news-card-gap);
  padding: 1.5rem 0 1rem;
}

/* ---- 单张卡片 ---- */
.page-news .card {
  display: flex;
  gap: 0;
  background: var(--clr-neutral1, #1A2A4A);
  border-radius: var(--news-card-radius);
  overflow: hidden;
  border: 1px solid transparent;
  transition: border-color var(--transition, 0.3s ease), box-shadow var(--transition, 0.3s ease), transform var(--transition, 0.3s ease);
  position: relative;
  animation: pageNewsFadeUp 0.5s ease forwards;
  opacity: 0;
}

/* 卡片依次出现 */
.page-news .card:nth-child(1) { animation-delay: 0.05s; }
.page-news .card:nth-child(2) { animation-delay: 0.15s; }
.page-news .card:nth-child(3) { animation-delay: 0.25s; }

@keyframes pageNewsFadeUp {
  0% {
    opacity: 0;
    transform: translateY(18px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 卡片悬停 */
.page-news .card:hover {
  border-color: var(--clr-accent, #FF6F00);
  box-shadow: 0 8px 32px rgba(255, 111, 0, 0.12);
  transform: translateY(-3px);
}

/* ---- 左侧垂直进度条 ---- */
.page-news .card-progress {
  flex: 0 0 var(--news-progress-width);
  width: var(--news-progress-width);
  min-width: var(--news-progress-width);
  background: var(--clr-neutral2, #2C3E5A);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
}

.page-news .card-progress-bar {
  display: block;
  width: 100%;
  height: calc(var(--progress, 50%) * 1%);
  min-height: 4px;
  background: var(--clr-accent, #FF6F00);
  border-radius: 0 0 3px 3px;
  transition: height 0.6s ease;
  position: relative;
}

.page-news .card-progress-bar::after {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--clr-accent, #FF6F00);
  filter: brightness(1.3);
  border-radius: 2px;
}

/* ---- 卡片内容区 ---- */
.page-news .card-content {
  flex: 1;
  padding: 1.2rem 1.2rem 1.2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-width: 0;
}

/* ---- 卡片图片 ---- */
.page-news .card-image-wrap {
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 0.2rem;
  background: var(--clr-neutral2, #2C3E5A);
  position: relative;
}

.page-news .card-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  transition: transform 0.4s ease;
}

.page-news .card:hover .card-img {
  transform: scale(1.03);
}

/* 无图片时的占位 */
.page-news .card-image-placeholder {
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--clr-neutral2, #2C3E5A) 0%, var(--clr-neutral1, #1A2A4A) 100%);
  border: 1px dashed var(--clr-neutral3, #EAEAEA);
  opacity: 0.6;
}

.page-news .img-placeholder-text {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 0.9rem;
  color: var(--clr-secondary2, #C5A55A);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---- 卡片标题 ---- */
.page-news .card-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 1.2rem;
  line-height: 1.3;
  color: var(--clr-text-light, #FFFFFF);
  margin: 0;
  letter-spacing: -0.01em;
}

/* ---- 卡片摘要 ---- */
.page-news .card-excerpt {
  font-family: var(--font-body, 'Segoe UI', Roboto, sans-serif);
  font-size: var(--fs-body, 1rem);
  line-height: 1.6;
  color: var(--clr-neutral3, #EAEAEA);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---- 卡片元数据 ---- */
.page-news .card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.2rem;
}

.page-news .card-tag {
  font-family: var(--font-body, 'Segoe UI', Roboto, sans-serif);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.7rem;
  border-radius: 12px;
  background: var(--clr-neutral2, #2C3E5A);
  color: var(--clr-text-light, #FFFFFF);
  font-weight: 600;
}

.page-news .tag-expert {
  background: rgba(255, 111, 0, 0.15);
  color: var(--news-clr-tab-expert, #FF6F00);
}

.page-news .tag-tutorial {
  background: rgba(74, 144, 217, 0.15);
  color: var(--news-clr-tab-tutorial, #4A90D9);
}

.page-news .tag-brand {
  background: rgba(197, 165, 90, 0.15);
  color: var(--news-clr-tab-brand, #C5A55A);
}

.page-news .card-hot {
  font-size: 0.75rem;
  color: var(--clr-neutral3, #EAEAEA);
  opacity: 0.7;
}

/* ---- 卡片链接 ---- */
.page-news .card-link {
  font-family: var(--font-body, 'Segoe UI', Roboto, sans-serif);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-accent, #FF6F00);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: color var(--transition, 0.3s ease), gap var(--transition, 0.3s ease);
  margin-top: auto;
  align-self: flex-start;
}

.page-news .card-link:hover,
.page-news .card-link:focus-visible {
  color: var(--clr-secondary1, #4A90D9);
  gap: 0.6rem;
  text-decoration: underline;
}

/* ---- 底部CTA ---- */
.page-news .news-cta {
  margin: 2.5rem 0 1rem;
}

.page-news .cta-card {
  background: linear-gradient(135deg, var(--clr-neutral1, #1A2A4A) 0%, var(--clr-neutral2, #2C3E5A) 100%);
  border-radius: var(--news-card-radius);
  padding: 2rem 1.5rem;
  border: 1px solid var(--clr-neutral2, #2C3E5A);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}

.page-news .cta-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 1.6rem;
  color: var(--clr-text-light, #FFFFFF);
  margin: 0;
  text-transform: uppercase;
}

.page-news .cta-text {
  font-family: var(--font-body, 'Segoe UI', Roboto, sans-serif);
  font-size: 1rem;
  color: var(--clr-neutral3, #EAEAEA);
  max-width: 500px;
  margin: 0;
  line-height: 1.6;
}

.page-news .cta-card .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.8rem;
  border-radius: 6px;
  font-family: var(--font-body, 'Segoe UI', Roboto, sans-serif);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background var(--transition, 0.3s ease), color var(--transition, 0.3s ease), box-shadow var(--transition, 0.3s ease);
  border: none;
  cursor: pointer;
}

.page-news .cta-card .btn-primary {
  background: var(--clr-accent, #FF6F00);
  color: var(--clr-text-light, #FFFFFF);
}

.page-news .cta-card .btn-primary:hover {
  background: #e06300;
  box-shadow: 0 4px 20px rgba(255, 111, 0, 0.3);
}

.page-news .cta-card .btn-secondary {
  background: transparent;
  color: var(--clr-accent, #FF6F00);
  border: 2px solid var(--clr-accent, #FF6F00);
}

.page-news .cta-card .btn-secondary:hover {
  background: var(--clr-accent, #FF6F00);
  color: var(--clr-text-light, #FFFFFF);
}

.page-news .cta-card .btn + .btn {
  margin-left: 0.6rem;
}

/* ========================================
   桌面端样式 (min-width: 768px)
   ======================================== */
@media (min-width: 768px) {
  .page-news .page-title {
    font-size: 3.6rem;
  }

  .page-news .page-title::after {
    width: 80px;
    height: 5px;
  }

  .page-news .page-subtitle {
    font-size: 1.15rem;
  }

  /* 标签与面板并排 */
  .page-news .tabs-container {
    flex-direction: row;
    gap: 2rem;
    align-items: flex-start;
  }

  /* 标签导航改为垂直 */
  .page-news .tab-labels-wrapper {
    flex-direction: column;
    overflow-x: visible;
    gap: 0.6rem;
    padding: 1.5rem 1.2rem 1.5rem 0;
    min-width: 170px;
    width: 170px;
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--header-height, 70px) + 1rem);
    background: transparent;
    scrollbar-width: auto;
  }

  .page-news .tab-label {
    font-size: 1rem;
    padding: 0.8rem 1.2rem 0.8rem 1.2rem;
    white-space: normal;
    width: 100%;
    border-left: 4px solid transparent;
  }

  .page-news .tab-label::before {
    top: 10%;
    bottom: 10%;
  }

  /* 面板占满剩余宽度 */
  .page-news .tab-panels {
    flex: 1;
    min-width: 0;
  }

  /* 卡片网格：两列 */
  .page-news .card-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    padding: 0.5rem 0 1rem;
  }

  .page-news .card {
    flex-direction: column;
  }

  .page-news .card-progress {
    flex: 0 0 8px;
    width: auto;
    min-width: auto;
    height: 8px;
    flex-direction: row;
    justify-content: flex-start;
    border-radius: 0 0 0 0;
  }

  .page-news .card-progress-bar {
    width: calc(var(--progress, 50%) * 1%);
    height: 100%;
    min-height: auto;
    border-radius: 0 3px 3px 0;
  }

  .page-news .card-progress-bar::after {
    top: 0;
    left: -2px;
    width: 4px;
    height: 100%;
    border-radius: 2px;
  }

  .page-news .card-content {
    padding: 1.2rem 1.5rem 1.5rem;
  }

  .page-news .card-title {
    font-size: 1.25rem;
  }

  .page-news .cta-card {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
    padding: 2rem 3rem;
  }

  .page-news .cta-card .cta-text {
    max-width: 400px;
  }

  .page-news .cta-card .btn-wrap {
    flex-shrink: 0;
  }
}

/* ---- 大桌面端微调 ---- */
@media (min-width: 1024px) {
  .page-news .page-title {
    font-size: 4rem;
  }

  .page-news .tab-labels-wrapper {
    min-width: 200px;
    width: 200px;
  }

  .page-news .card-grid {
    gap: 1.8rem;
  }
}

/* ---- 确保窄屏不横向溢出 ---- */
@media (max-width: 420px) {
  .page-news .page-title {
    font-size: 2rem;
  }

  .page-news .tab-label {
    font-size: 0.9rem;
    padding: 0.5rem 1rem 0.5rem 0.9rem;
  }

  .page-news .card-content {
    padding: 0.8rem 0.8rem 0.8rem 0.6rem;
  }

  .page-news .card-title {
    font-size: 1rem;
  }

  .page-news .card-progress {
    flex-basis: 4px;
    min-width: 4px;
  }
}

.page-news {
  --progress: 1rem;
}