.page-news {
  --tl-dot-size: 18px;
  --tl-line-width: 3px;
  --tl-item-gap: 40px;
  color: var(--color-white, #F5F5F5);
  font-family: var(--font-body, "PingFang SC", "Microsoft YaHei", "Helvetica Neue Light", Arial, sans-serif);
  background-color: var(--color-dark, #1A1A2E);
  padding: 0 16px 60px;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  overflow-x: hidden;
}
.page-news .breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 20px 0 12px;
  font-size: 13px;
  color: var(--color-silver, #A0A0B0);
  letter-spacing: 0.3px;
}
.page-news .breadcrumb__link {
  color: var(--color-dull-gold, #B8922E);
  text-decoration: none;
  transition: color 0.2s;
}
.page-news .breadcrumb__link:hover,
.page-news .breadcrumb__link:focus-visible {
  color: var(--color-gold, #D4AF37);
  text-decoration: underline;
}
.page-news .breadcrumb__separator {
  color: var(--color-silver, #A0A0B0);
  font-weight: 300;
}
.page-news .breadcrumb__current {
  color: var(--color-white, #F5F5F5);
  font-weight: 500;
}
.page-news__hero {
  padding: 16px 0 32px;
  border-bottom: 2px solid var(--color-gray, #2B2B3D);
  margin-bottom: 40px;
}
.page-news__hero-title {
  font-family: var(--font-heading, "PingFang SC", "Microsoft YaHei", "Arial Black", Impact, sans-serif);
  font-size: clamp(2.4rem, 8vw, 3.8rem);
  font-weight: 900;
  margin: 0 0 12px;
  background: var(--color-gold-gradient, linear-gradient(135deg, #D4AF37 0%, #F5D76E 40%, #B8922E 100%));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.page-news__hero-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-silver, #A0A0B0);
  max-width: 680px;
  margin: 0;
  font-weight: 300;
}
.page-news__section-title {
  font-family: var(--font-heading, "PingFang SC", "Microsoft YaHei", "Arial Black", Impact, sans-serif);
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  font-weight: 800;
  color: var(--color-white, #F5F5F5);
  margin: 0 0 16px;
  letter-spacing: -0.01em;
  position: relative;
  display: inline-block;
}
.page-news__section-title::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-gold-gradient, linear-gradient(135deg, #D4AF37 0%, #F5D76E 40%, #B8922E 100%));
  border-radius: 4px;
  margin-top: 8px;
}

/* ===== 时间线区域 ===== */
.page-news__timeline-section {
  margin-bottom: 60px;
}
.page-news__timeline-decor {
  margin: 12px 0 28px;
  border-radius: var(--radius-md, 16px);
  overflow: hidden;
  background: var(--color-gray, #2B2B3D);
  max-width: 100%;
}
.page-news__decor-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: inherit;
}
.page-news__timeline {
  position: relative;
  padding-left: 28px;
}
.page-news__timeline::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: var(--tl-line-width, 3px);
  background: linear-gradient(to bottom, var(--color-gold, #D4AF37), var(--color-crimson, #8B0000));
  border-radius: 4px;
  opacity: 0.35;
}
.timeline__item {
  position: relative;
  margin-bottom: var(--tl-item-gap, 40px);
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
}
.timeline__item:last-child {
  margin-bottom: 0;
}
.timeline__dot {
  position: absolute;
  left: -28px;
  top: 6px;
  width: var(--tl-dot-size, 18px);
  height: var(--tl-dot-size, 18px);
  border-radius: 50%;
  background: var(--color-gold, #D4AF37);
  border: 3px solid var(--color-dark, #1A1A2E);
  box-shadow: 0 0 0 3px var(--color-gold, #D4AF37);
  z-index: 2;
  transition: transform 0.25s, box-shadow 0.25s;
}
.timeline__item:hover .timeline__dot,
.timeline__item:focus-within .timeline__dot {
  transform: scale(1.2);
  box-shadow: 0 0 0 5px var(--color-gold, #D4AF37), 0 0 20px rgba(212, 175, 55, 0.3);
}
.timeline__time {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--color-dull-gold, #B8922E);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  opacity: 0.5;
  width: 100%;
  padding-left: 0;
  margin-bottom: 8px;
  font-style: italic;
  transition: opacity 0.25s;
}
.timeline__item:hover .timeline__time,
.timeline__item:focus-within .timeline__time {
  opacity: 0.85;
}
.timeline__card {
  width: 100%;
  background: var(--color-gray, #2B2B3D);
  border-radius: var(--radius-md, 16px);
  border: 1px solid var(--color-silver, #A0A0B0);
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.timeline__card:hover,
.timeline__card:focus-within {
  border-color: var(--color-gold, #D4AF37);
  box-shadow: var(--shadow-card, 0 4px 20px rgba(0,0,0,0.4));
}
.timeline__card details {
  display: block;
}
.timeline__card summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
  transition: background 0.2s;
}
.timeline__card summary::-webkit-details-marker {
  display: none;
}
.timeline__card summary:hover,
.timeline__card summary:focus-visible {
  background: rgba(212, 175, 55, 0.06);
}
.timeline__card-title {
  font-family: var(--font-heading, "PingFang SC", "Microsoft YaHei", "Arial Black", Impact, sans-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white, #F5F5F5);
  letter-spacing: -0.01em;
}
.timeline__card-arrow {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--color-gold, #D4AF37);
  border-bottom: 2px solid var(--color-gold, #D4AF37);
  transform: rotate(45deg);
  transition: transform 0.3s;
  flex-shrink: 0;
  margin-left: 12px;
}
.timeline__card details[open] .timeline__card-arrow {
  transform: rotate(-135deg);
}
.timeline__card-body {
  padding: 0 20px 20px;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--color-silver, #A0A0B0);
  animation: timelineFadeIn 0.3s ease;
}
.timeline__card-body p {
  margin: 0 0 12px;
}
.timeline__card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-gold, #D4AF37);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}
.timeline__card-link:hover,
.timeline__card-link:focus-visible {
  border-bottom-color: var(--color-gold, #D4AF37);
  color: var(--color-lime, #C9E265);
}

/* ===== 功能说明索引 ===== */
.page-news__features-section {
  margin-bottom: 60px;
}
.page-news__features-desc {
  font-size: 1rem;
  color: var(--color-silver, #A0A0B0);
  margin: -8px 0 24px;
  font-weight: 300;
}
.page-news__filter-wrapper {
  position: relative;
}
.page-news__filter-radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
.page-news__filter-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.page-news__filter-label {
  display: inline-block;
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-heading, "PingFang SC", "Microsoft YaHei", "Arial Black", Impact, sans-serif);
  color: var(--color-silver, #A0A0B0);
  background: var(--color-gray, #2B2B3D);
  border-radius: var(--radius-pill, 9999px);
  cursor: pointer;
  transition: background 0.25s, color 0.25s, transform 0.15s;
  border: 1px solid transparent;
  user-select: none;
}
.page-news__filter-label:hover {
  background: rgba(212, 175, 55, 0.15);
  color: var(--color-white, #F5F5F5);
}
#filter-all:checked ~ .page-news__filter-labels label[for="filter-all"],
#filter-guide:checked ~ .page-news__filter-labels label[for="filter-guide"],
#filter-data:checked ~ .page-news__filter-labels label[for="filter-data"],
#filter-member:checked ~ .page-news__filter-labels label[for="filter-member"] {
  background: var(--color-gold, #D4AF37);
  color: var(--color-dark, #1A1A2E);
  border-color: var(--color-gold, #D4AF37);
  transform: scale(1.02);
}

/* 筛选逻辑 */
#filter-all:checked ~ .page-news__features-grid .feature-card {
  display: flex;
}
#filter-guide:checked ~ .page-news__features-grid .feature-card[data-category="guide"] {
  display: flex;
}
#filter-guide:checked ~ .page-news__features-grid .feature-card:not([data-category="guide"]) {
  display: none;
}
#filter-data:checked ~ .page-news__features-grid .feature-card[data-category="data"] {
  display: flex;
}
#filter-data:checked ~ .page-news__features-grid .feature-card:not([data-category="data"]) {
  display: none;
}
#filter-member:checked ~ .page-news__features-grid .feature-card[data-category="member"] {
  display: flex;
}
#filter-member:checked ~ .page-news__features-grid .feature-card:not([data-category="member"]) {
  display: none;
}

.page-news__features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  animation: featureGridIn 0.4s ease;
}
.feature-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--color-gray, #2B2B3D);
  border-radius: var(--radius-md, 16px);
  padding: 16px 18px;
  border: 1px solid var(--color-silver, #A0A0B0);
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.2s;
  position: relative;
  animation: cardFadeUp 0.5s ease forwards;
  opacity: 0;
}
.feature-card:nth-child(1) { animation-delay: 0.05s; }
.feature-card:nth-child(2) { animation-delay: 0.12s; }
.feature-card:nth-child(3) { animation-delay: 0.19s; }
.feature-card:nth-child(4) { animation-delay: 0.26s; }
.feature-card:nth-child(5) { animation-delay: 0.33s; }
.feature-card:hover,
.feature-card:focus-within {
  border-color: var(--color-gold, #D4AF37);
  box-shadow: var(--shadow-card, 0 4px 20px rgba(0,0,0,0.4));
  transform: translateY(-2px);
}
.feature-card__icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm, 8px);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--color-dark, #1A1A2E);
  border: 1px solid rgba(212, 175, 55, 0.15);
}
.feature-card__text {
  flex: 1;
  min-width: 0;
}
.feature-card__title {
  font-family: var(--font-heading, "PingFang SC", "Microsoft YaHei", "Arial Black", Impact, sans-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-white, #F5F5F5);
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}
.feature-card__desc {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--color-silver, #A0A0B0);
  margin: 0;
  font-weight: 300;
}
.feature-card__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-heading, "PingFang SC", "Microsoft YaHei", "Arial Black", Impact, sans-serif);
  color: var(--color-gold, #D4AF37);
  background: transparent;
  border: 1px solid var(--color-gold, #D4AF37);
  border-radius: var(--radius-pill, 9999px);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.25s, color 0.25s;
  flex-shrink: 0;
}
.feature-card__link:hover,
.feature-card__link:focus-visible {
  background: var(--color-gold, #D4AF37);
  color: var(--color-dark, #1A1A2E);
}

/* ===== 常见更新模式 ===== */
.page-news__compare-section {
  margin-bottom: 40px;
}
.page-news__compare-content {
  display: flex;
  flex-direction: column;
  gap: 28px;
  background: var(--color-gray, #2B2B3D);
  border-radius: var(--radius-lg, 24px);
  padding: 24px 20px;
  border: 1px solid var(--color-silver, #A0A0B0);
  transition: border-color 0.25s, box-shadow 0.25s;
}
.page-news__compare-content:hover,
.page-news__compare-content:focus-within {
  border-color: var(--color-crimson, #8B0000);
  box-shadow: var(--shadow-card, 0 4px 20px rgba(0,0,0,0.4));
}
.page-news__compare-image {
  border-radius: var(--radius-md, 16px);
  overflow: hidden;
  background: var(--color-dark, #1A1A2E);
}
.page-news__compare-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: inherit;
}
.page-news__compare-text {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-news__compare-desc {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-white, #F5F5F5);
  margin: 0;
}
.page-news__compare-desc strong {
  color: var(--color-gold, #D4AF37);
  font-weight: 700;
}
.page-news__compare-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-news__compare-list li {
  position: relative;
  padding-left: 24px;
  font-size: 0.93rem;
  color: var(--color-silver, #A0A0B0);
  line-height: 1.6;
}
.page-news__compare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  background: var(--color-lime, #C9E265);
  border-radius: 3px;
  opacity: 0.7;
}
.page-news .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-heading, "PingFang SC", "Microsoft YaHei", "Arial Black", Impact, sans-serif);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-pill, 9999px);
  text-decoration: none;
  transition: background 0.25s, color 0.25s, transform 0.15s;
  cursor: pointer;
  border: 2px solid transparent;
  align-self: flex-start;
}
.page-news .btn--primary {
  background: var(--color-gold, #D4AF37);
  color: var(--color-dark, #1A1A2E);
  border-color: var(--color-gold, #D4AF37);
}
.page-news .btn--primary:hover,
.page-news .btn--primary:focus-visible {
  background: transparent;
  color: var(--color-gold, #D4AF37);
  transform: scale(1.02);
}
.page-news .btn--secondary {
  background: transparent;
  color: var(--color-gold, #D4AF37);
  border-color: var(--color-gold, #D4AF37);
}
.page-news .btn--secondary:hover,
.page-news .btn--secondary:focus-visible {
  background: var(--color-gold, #D4AF37);
  color: var(--color-dark, #1A1A2E);
  transform: scale(1.02);
}

/* ===== 动画关键帧 ===== */
@keyframes timelineFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes cardFadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes featureGridIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===== 桌面端 ≥768px ===== */
@media (min-width: 768px) {
  .page-news {
    padding: 0 32px 80px;
  }
  .page-news__hero {
    padding: 24px 0 48px;
    margin-bottom: 56px;
  }
  .page-news__hero-title {
    font-size: clamp(3rem, 6vw, 4.2rem);
  }
  .page-news__hero-desc {
    font-size: 1.1rem;
    max-width: 720px;
  }
  .page-news__timeline {
    padding-left: 44px;
  }
  .page-news__timeline::before {
    left: 20px;
  }
  .timeline__dot {
    left: -44px;
    width: 22px;
    height: 22px;
  }
  .timeline__time {
    width: auto;
    position: absolute;
    left: -44px;
    top: 30px;
    font-size: 0.75rem;
    writing-mode: vertical-lr;
    text-orientation: mixed;
    letter-spacing: 2px;
    padding-left: 6px;
  }
  .timeline__card summary {
    padding: 20px 28px;
  }
  .timeline__card-title {
    font-size: 1.25rem;
  }
  .timeline__card-body {
    padding: 0 28px 24px;
    font-size: 1rem;
  }
  .page-news__features-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .feature-card {
    padding: 20px 24px;
  }
  .feature-card__icon {
    width: 72px;
    height: 72px;
  }
  .feature-card__title {
    font-size: 1.1rem;
  }
  .page-news__compare-content {
    flex-direction: row;
    align-items: center;
    padding: 32px 36px;
    gap: 36px;
  }
  .page-news__compare-image {
    flex: 0 0 48%;
    max-width: 500px;
  }
  .page-news__compare-text {
    flex: 1;
    gap: 18px;
  }
  .page-news__compare-desc {
    font-size: 1.05rem;
  }
  .page-news .btn {
    font-size: 1rem;
    padding: 14px 32px;
  }
}

/* ===== 桌面端 ≥1024px ===== */
@media (min-width: 1024px) {
  .page-news__features-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-news__timeline {
    padding-left: 60px;
  }
  .timeline__dot {
    left: -60px;
    width: 26px;
    height: 26px;
  }
  .timeline__time {
    left: -60px;
    font-size: 0.8rem;
  }
  .page-news__compare-content {
    padding: 40px 48px;
  }
}