/* ===== 页面专属：品牌日志 ===== */
.page-news {
  --news-red: #E63946;
  --news-blue: #1D3557;
  --news-gold: #F4A261;
  --news-light: #F1FAEE;
  --news-dark: #0B1622;
  --news-text: #2C3E50;
  --news-text-secondary: #7F8C8D;
  --news-radius-sm: 8px;
  --news-radius-lg: 50px;
  --news-transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --news-font-heading: 'Oswald', 'Impact', 'Arial Black', sans-serif;
  --news-font-body: 'Roboto', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --news-font-numeric: 'Roboto Mono', 'Consolas', 'Courier New', monospace;

  max-width: 100%;
  overflow-x: hidden;
  background-color: var(--news-light);
  color: var(--news-text);
  font-family: var(--news-font-body);
  line-height: 1.6;
}

/* ---- 面包屑 ---- */
.page-news .news-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  max-width: 1280px;
  margin: 0 auto;
  font-size: 0.875rem;
  color: var(--news-text-secondary);
  background: transparent;
}
.page-news .news-breadcrumb a {
  color: var(--news-blue);
  text-decoration: none;
  transition: color var(--news-transition);
}
.page-news .news-breadcrumb a:hover,
.page-news .news-breadcrumb a:focus-visible {
  color: var(--news-red);
  text-decoration: underline;
}
.page-news .news-breadcrumb-sep {
  color: var(--news-text-secondary);
  font-weight: 700;
}
.page-news .news-breadcrumb [aria-current="page"] {
  font-weight: 600;
  color: var(--news-text);
}

/* ---- 英雄区 ---- */
.page-news .news-hero {
  position: relative;
  width: 100%;
  height: 240px;
  overflow: hidden;
  background: var(--news-dark);
}
.page-news .news-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-news .news-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}
.page-news .news-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(13, 22, 34, 0.88) 40%, rgba(230, 57, 70, 0.55) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}
.page-news .news-hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  height: 100%;
  padding: 0 1.5rem;
  max-width: 1280px;
  margin: 0 auto;
}
.page-news .news-hero-title {
  font-family: var(--news-font-heading);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1.1;
  margin: 0 0 0.25rem;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.page-news .news-hero-subtitle {
  font-family: var(--news-font-body);
  font-size: clamp(0.95rem, 2vw, 1.25rem);
  font-weight: 300;
  color: var(--news-gold);
  letter-spacing: 0.06em;
  margin: 0;
  opacity: 0.9;
}

/* ---- 筛选区 ---- */
.page-news .news-filter {
  position: relative;
  z-index: 3;
  max-width: 1280px;
  margin: -1.5rem auto 1.5rem;
  padding: 0 1.25rem;
}
.page-news .news-filter-radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
.page-news .news-filter-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  background: #ffffff;
  padding: 0.5rem;
  border-radius: var(--news-radius-lg);
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.page-news .news-filter-label {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border-radius: var(--news-radius-lg);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--news-text);
  background: transparent;
  cursor: pointer;
  transition: all var(--news-transition);
  user-select: none;
  border: 1.5px solid transparent;
}
.page-news .news-filter-label:hover {
  background: rgba(29, 53, 87, 0.06);
}
.page-news .news-filter-label--red { border-color: rgba(230, 57, 70, 0.3); }
.page-news .news-filter-label--blue { border-color: rgba(29, 53, 87, 0.3); }
.page-news .news-filter-label--gold { border-color: rgba(244, 162, 97, 0.3); }

/* 选中态 */
#nf-all:checked ~ .news-filter-labels label[for="nf-all"],
#nf-latest:checked ~ .news-filter-labels label[for="nf-latest"],
#nf-guides:checked ~ .news-filter-labels label[for="nf-guides"],
#nf-data:checked ~ .news-filter-labels label[for="nf-data"] {
  background: var(--news-blue);
  color: #ffffff;
  border-color: var(--news-blue);
  box-shadow: 0 2px 10px rgba(29, 53, 87, 0.25);
}
#nf-latest:checked ~ .news-filter-labels label[for="nf-latest"] {
  background: var(--news-red);
  border-color: var(--news-red);
  box-shadow: 0 2px 10px rgba(230, 57, 70, 0.25);
}
#nf-guides:checked ~ .news-filter-labels label[for="nf-guides"] {
  background: var(--news-blue);
  border-color: var(--news-blue);
  box-shadow: 0 2px 10px rgba(29, 53, 87, 0.25);
}
#nf-data:checked ~ .news-filter-labels label[for="nf-data"] {
  background: #b87a4a;
  border-color: #b87a4a;
  box-shadow: 0 2px 10px rgba(244, 162, 97, 0.25);
  color: #fff;
}

/* ---- 筛选逻辑 ---- */
.page-news .news-section {
  display: block;
  transition: opacity 0.4s ease;
}
#nf-all:checked ~ .news-content .news-section { display: block; }
#nf-latest:checked ~ .news-content .news-section[data-category="latest"] { display: block; }
#nf-latest:checked ~ .news-content .news-section:not([data-category="latest"]) { display: none; }
#nf-guides:checked ~ .news-content .news-section[data-category="guides"] { display: block; }
#nf-guides:checked ~ .news-content .news-section:not([data-category="guides"]) { display: none; }
#nf-data:checked ~ .news-content .news-section[data-category="data"] { display: block; }
#nf-data:checked ~ .news-content .news-section:not([data-category="data"]) { display: none; }

/* ---- 内容区 ---- */
.page-news .news-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

/* ---- 章节标题 ---- */
.page-news .news-section-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--news-font-heading);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  color: var(--news-blue);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 2.5rem 0 1.5rem;
  padding-bottom: 0.6rem;
  border-bottom: 3px solid var(--news-red);
  position: relative;
}
.page-news .news-section-title::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--news-gold);
}
.page-news .news-section-title-icon {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--news-red);
  border-radius: 50%;
  flex-shrink: 0;
}
.page-news .news-section[data-category="guides"] .news-section-title {
  border-bottom-color: var(--news-blue);
}
.page-news .news-section[data-category="guides"] .news-section-title::after {
  background: var(--news-gold);
}
.page-news .news-section[data-category="guides"] .news-section-title-icon {
  background: var(--news-blue);
}
.page-news .news-section[data-category="data"] .news-section-title {
  border-bottom-color: var(--news-gold);
}
.page-news .news-section[data-category="data"] .news-section-title::after {
  background: var(--news-red);
}
.page-news .news-section[data-category="data"] .news-section-title-icon {
  background: var(--news-gold);
}

/* ---- 时间线容器 ---- */
.page-news .timeline {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  padding-left: 1.5rem;
  position: relative;
}

/* ---- 时间线条目 ---- */
.page-news .timeline-item {
  display: flex;
  gap: 1rem;
  position: relative;
  animation: newsFadeInUp 0.6s ease both;
}
.page-news .timeline-item:nth-child(1) { animation-delay: 0.05s; }
.page-news .timeline-item:nth-child(2) { animation-delay: 0.15s; }
.page-news .timeline-item:nth-child(3) { animation-delay: 0.25s; }
.page-news .timeline-item:nth-child(4) { animation-delay: 0.35s; }
.page-news .timeline-item:nth-child(5) { animation-delay: 0.45s; }

@keyframes newsFadeInUp {
  0% { opacity: 0; transform: translateY(24px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* ---- 时间线标记（左侧） ---- */
.page-news .timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 36px;
  position: relative;
  padding-top: 4px;
}
.page-news .timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--news-red);
  border: 2px solid #ffffff;
  box-shadow: 0 0 0 2px var(--news-red);
  flex-shrink: 0;
  z-index: 2;
  transition: transform var(--news-transition);
}
.page-news .timeline-item:hover .timeline-dot {
  transform: scale(1.3);
}
.page-news .timeline-dot--blue {
  background: var(--news-blue);
  box-shadow: 0 0 0 2px var(--news-blue);
}
.page-news .timeline-dot--gold {
  background: var(--news-gold);
  box-shadow: 0 0 0 2px var(--news-gold);
}
.page-news .timeline-line {
  position: absolute;
  top: 16px;
  bottom: -1.75rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--news-red), rgba(230, 57, 70, 0.15));
  z-index: 1;
}
.page-news .timeline-item:last-child .timeline-line {
  display: none;
}
.page-news .timeline-dot--blue + .timeline-line {
  background: linear-gradient(to bottom, var(--news-blue), rgba(29, 53, 87, 0.15));
}
.page-news .timeline-dot--gold + .timeline-line {
  background: linear-gradient(to bottom, var(--news-gold), rgba(244, 162, 97, 0.15));
}
.page-news .timeline-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--news-red);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  writing-mode: vertical-rl;
  margin-top: 2px;
  line-height: 1.2;
  opacity: 0.7;
}
.page-news .timeline-label--blue { color: var(--news-blue); }
.page-news .timeline-label--gold { color: #b87a4a; }

/* ---- 时间线卡片 ---- */
.page-news .timeline-card {
  flex: 1;
  min-width: 0;
  background: #ffffff;
  border-radius: var(--news-radius-sm);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  overflow: hidden;
  transition: box-shadow var(--news-transition), transform var(--news-transition);
  display: flex;
  flex-direction: column;
}
.page-news .timeline-card:hover {
  box-shadow: 0 8px 30px rgba(0,0,0,0.10);
  transform: translateY(-2px);
}
.page-news .timeline-card-img {
  width: 100%;
  overflow: hidden;
  background: var(--news-dark);
  line-height: 0;
}
.page-news .timeline-card-img img {
  width: 100%;
  height: auto;
  max-height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
  display: block;
}
.page-news .timeline-card:hover .timeline-card-img img {
  transform: scale(1.03);
}
.page-news .timeline-card-body {
  padding: 1rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-news .timeline-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.page-news .tag {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.page-news .tag-red { background: rgba(230, 57, 70, 0.12); color: var(--news-red); }
.page-news .tag-blue { background: rgba(29, 53, 87, 0.12); color: var(--news-blue); }
.page-news .tag-gold { background: rgba(244, 162, 97, 0.15); color: #8a5d2e; }
.page-news .tag-outline {
  background: transparent;
  border: 1px solid rgba(44, 62, 80, 0.15);
  color: var(--news-text-secondary);
}
.page-news .timeline-card-title {
  font-family: var(--news-font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--news-blue);
  line-height: 1.3;
  margin: 0;
}
.page-news .timeline-card-summary {
  font-size: 0.9rem;
  color: var(--news-text);
  line-height: 1.5;
  margin: 0;
  opacity: 0.85;
}
.page-news .timeline-card-details {
  margin-top: 0.25rem;
  border-top: 1px solid rgba(0,0,0,0.06);
  padding-top: 0.6rem;
}
.page-news .timeline-card-summary-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--news-red);
  cursor: pointer;
  list-style: none;
  transition: color var(--news-transition);
  user-select: none;
}
.page-news .timeline-card-summary-btn::-webkit-details-marker { display: none; }
.page-news .timeline-card-summary-btn::before {
  content: '+';
  display: inline-block;
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1;
  transition: transform var(--news-transition);
}
.page-news details[open] .timeline-card-summary-btn::before {
  content: '−';
  transform: rotate(0deg);
}
.page-news .timeline-card-summary-btn:hover { color: var(--news-blue); }
.page-news .timeline-card-full {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--news-text);
  line-height: 1.6;
  padding-left: 0.25rem;
  animation: newsFadeIn 0.3s ease;
}
.page-news .timeline-card-full p {
  margin: 0 0 0.75rem;
}
@keyframes newsFadeIn {
  0% { opacity: 0; transform: translateY(-6px); }
  100% { opacity: 1; transform: translateY(0); }
}
.page-news .timeline-card-link {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--news-red);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all var(--news-transition);
}
.page-news .timeline-card-link:hover,
.page-news .timeline-card-link:focus-visible {
  color: var(--news-blue);
  border-bottom-color: var(--news-blue);
}

/* ---- 响应式: 平板及以上 ---- */
@media (min-width: 640px) {
  .page-news .news-hero { height: 280px; }
  .page-news .news-hero-content { padding: 0 2.5rem; }
  .page-news .news-filter { margin-top: -1.8rem; }
  .page-news .news-filter-labels { gap: 0.75rem; padding: 0.6rem 0.8rem; }
  .page-news .news-filter-label { padding: 0.6rem 1.5rem; font-size: 0.95rem; }
  .page-news .news-content { padding: 0 2.5rem 4rem; }
  .page-news .timeline { padding-left: 2.5rem; gap: 2rem; }
  .page-news .timeline-marker { width: 44px; }
  .page-news .timeline-dot { width: 14px; height: 14px; }
  .page-news .timeline-label { font-size: 0.7rem; }
  .page-news .timeline-card { flex-direction: row; }
  .page-news .timeline-card-img { width: 220px; flex-shrink: 0; }
  .page-news .timeline-card-img img { max-height: 100%; height: 100%; object-fit: cover; }
  .page-news .timeline-card-body { flex: 1; }
  .page-news .timeline-card-title { font-size: 1.2rem; }
}

@media (min-width: 1024px) {
  .page-news .news-hero { height: 320px; }
  .page-news .news-hero-content { padding: 0 4rem; }
  .page-news .news-filter { margin-top: -2rem; padding: 0 4rem; }
  .page-news .news-filter-labels { justify-content: center; padding: 0.6rem 1rem; }
  .page-news .news-content { padding: 0 4rem 5rem; }
  .page-news .timeline { padding-left: 3.5rem; gap: 2.5rem; }
  .page-news .timeline-marker { width: 50px; }
  .page-news .timeline-dot { width: 16px; height: 16px; }
  .page-news .timeline-label { font-size: 0.75rem; }
  .page-news .timeline-card { border-radius: var(--news-radius-sm); }
  .page-news .timeline-card-img { width: 260px; }
  .page-news .timeline-card-body { padding: 1.25rem 1.5rem 1.5rem; }
  .page-news .timeline-card-title { font-size: 1.3rem; }
}

@media (min-width: 1280px) {
  .page-news .timeline-card-img { width: 300px; }
  .page-news .timeline-card-body { padding: 1.5rem 2rem 1.75rem; }
  .page-news .timeline-card-title { font-size: 1.4rem; }
}

/* ---- 窄屏溢出防护 ---- */
@media (max-width: 400px) {
  .page-news .news-filter-labels { gap: 0.35rem; padding: 0.4rem; }
  .page-news .news-filter-label { padding: 0.35rem 0.9rem; font-size: 0.78rem; }
  .page-news .timeline { padding-left: 1rem; }
  .page-news .timeline-marker { width: 28px; }
  .page-news .timeline-card-body { padding: 0.75rem 0.9rem 1rem; }
  .page-news .timeline-card-title { font-size: 1rem; }
}