/* ===== 天行赛事 - 品牌动态页面专属样式 ===== */
.page-news {
  --page-news-timeline-width: 4px;
  --page-news-dot-size: 16px;
  --page-news-icon-size: 48px;
  --page-news-content-max: 1080px;
  --page-news-gap: 2rem;
  --page-news-card-radius: 8px;
  --page-news-accent-gradient: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  --page-news-primary-gradient: linear-gradient(135deg, var(--color-primary) 0%, #1a3254 100%);

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

/* ===== 容器与轨道布局 ===== */
.page-news__container {
  display: flex;
  max-width: var(--page-news-content-max);
  margin: 0 auto;
  padding: 0 1.25rem;
  position: relative;
  gap: 1.5rem;
}

.page-news__track {
  display: none;
  flex-shrink: 0;
  width: 32px;
  position: sticky;
  top: calc(var(--header-height) + 2rem);
  align-self: flex-start;
  flex-direction: column;
  align-items: center;
  padding-top: 3rem;
}

.page-news__track-line {
  width: 2px;
  flex: 1;
  min-height: 200px;
  background: var(--page-news-accent-gradient);
  opacity: 0.3;
  border-radius: 2px;
}

.page-news__track-label {
  writing-mode: vertical-rl;
  font-size: var(--accent-size);
  font-weight: var(--accent-weight);
  letter-spacing: 0.3em;
  color: var(--color-accent);
  margin-top: 0.75rem;
  text-orientation: mixed;
}

.page-news__content {
  flex: 1;
  min-width: 0;
  padding: 2rem 0 4rem;
}

/* ===== 页头 ===== */
.page-news__intro {
  margin-bottom: 3.5rem;
  position: relative;
}

.page-news__chapter-number {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  display: inline-block;
  margin-bottom: 0.5rem;
  border-left: 3px solid var(--color-accent);
  padding-left: 0.75rem;
}

.page-news__page-title {
  font-size: 2.5rem;
  font-weight: var(--heading-weight);
  line-height: 1.1;
  color: var(--color-primary);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.page-news__page-desc {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 580px;
  margin: 0 0 1rem;
  line-height: 1.6;
}

.page-news__breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.page-news__breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-base);
}

.page-news__breadcrumb a:hover,
.page-news__breadcrumb a:focus-visible {
  color: var(--color-primary);
  outline: none;
  text-decoration: underline;
}

.page-news__breadcrumb-sep {
  color: var(--color-neutral-light);
}

/* ===== 通用章节头 ===== */
.page-news__section-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.page-news__section-number {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  padding: 0.15rem 0.45rem;
  line-height: 1.4;
}

.page-news__section-title {
  font-size: 1.75rem;
  font-weight: var(--heading-weight);
  color: var(--color-primary);
  margin: 0;
  letter-spacing: -0.01em;
}

.page-news__section-rule {
  flex: 1;
  min-width: 40px;
  height: 2px;
  background: var(--page-news-accent-gradient);
  opacity: 0.5;
  border-radius: 2px;
}

/* ===== 时间线 ===== */
.page-news__timeline {
  margin-bottom: 4.5rem;
}

.page-news__timeline-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.page-news__timeline-item {
  display: flex;
  gap: 1rem;
  position: relative;
  padding: 0 0 1.5rem;
  border-bottom: 1px solid var(--color-neutral-light);
  cursor: default;
  transition: background var(--transition-base);
  border-radius: var(--page-news-card-radius);
}

.page-news__timeline-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-news__timeline-item:hover {
  background: rgba(255, 107, 53, 0.03);
}

.page-news__timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: var(--page-news-icon-size);
  position: relative;
}

.page-news__timeline-icon {
  width: var(--page-news-icon-size);
  height: var(--page-news-icon-size);
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-white);
  box-shadow: 0 2px 8px rgba(11, 29, 58, 0.08);
  transition: transform var(--transition-base);
}

.page-news__timeline-item:hover .page-news__timeline-icon {
  transform: scale(1.06);
}

.page-news__timeline-dot {
  width: var(--page-news-dot-size);
  height: var(--page-news-dot-size);
  border-radius: 50%;
  background: var(--page-news-accent-gradient);
  margin-top: 0.5rem;
  flex-shrink: 0;
  border: 2px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-accent-light);
}

.page-news__timeline-body {
  flex: 1;
  min-width: 0;
}

.page-news__timeline-date {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  display: inline-block;
  margin-bottom: 0.3rem;
  letter-spacing: 0.03em;
}

.page-news__timeline-heading {
  font-size: 1.2rem;
  font-weight: var(--heading-weight);
  color: var(--color-primary);
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.page-news__timeline-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin: 0 0 0.6rem;
  max-width: 660px;
}

.page-news__timeline-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(255, 107, 53, 0.1);
  padding: 0.15rem 0.6rem;
  border-radius: 4px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ===== 行业视角 ===== */
.page-news__insights {
  margin-bottom: 4.5rem;
}

.page-news__insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-news__insight-card {
  background: var(--color-white);
  border-radius: var(--page-news-card-radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(11, 29, 58, 0.06);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.page-news__insight-card:hover {
  box-shadow: 0 6px 24px rgba(11, 29, 58, 0.12);
  transform: translateY(-2px);
}

.page-news__insight-image-wrap {
  width: 100%;
  aspect-ratio: 400 / 250;
  overflow: hidden;
  background: var(--color-neutral-light);
}

.page-news__insight-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
  display: block;
}

.page-news__insight-card:hover .page-news__insight-image {
  transform: scale(1.03);
}

.page-news__insight-content {
  padding: 1.25rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.page-news__insight-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-neutral-light);
  padding: 0.2rem 0.65rem;
  border-radius: 4px;
  letter-spacing: 0.04em;
  align-self: flex-start;
  margin-bottom: 0.6rem;
}

.page-news__insight-title {
  font-size: 1.15rem;
  font-weight: var(--heading-weight);
  color: var(--color-primary);
  margin: 0 0 0.6rem;
  line-height: 1.35;
}

.page-news__insight-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin: 0 0 0.8rem;
  flex: 1;
}

.page-news__insight-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-base);
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.page-news__insight-link:hover,
.page-news__insight-link:focus-visible {
  color: var(--color-primary);
  text-decoration: underline;
  outline: none;
}

/* ===== 订阅更新 ===== */
.page-news__subscribe {
  margin-bottom: 2rem;
}

.page-news__subscribe-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  background: var(--page-news-primary-gradient);
  border-radius: var(--page-news-card-radius);
  padding: 2rem 1.5rem;
  align-items: center;
}

.page-news__subscribe-visual {
  flex-shrink: 0;
}

.page-news__subscribe-image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-accent-light);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.25);
}

.page-news__subscribe-text {
  flex: 1;
  text-align: center;
}

.page-news__subscribe-desc {
  font-size: 0.95rem;
  color: rgba(240, 244, 248, 0.9);
  line-height: 1.65;
  margin: 0 0 1.25rem;
  max-width: 480px;
}

.page-news__subscribe-form {
  display: flex;
  gap: 0.5rem;
  max-width: 420px;
  margin: 0 auto;
}

.page-news__subscribe-input {
  flex: 1;
  min-width: 0;
  padding: 0.7rem 1rem;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-white);
  font-size: 0.9rem;
  font-family: var(--font-family);
  transition: border-color var(--transition-base), background var(--transition-base);
  outline: none;
}

.page-news__subscribe-input::placeholder {
  color: rgba(240, 244, 248, 0.5);
}

.page-news__subscribe-input:focus {
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.2);
}

.page-news__subscribe-btn {
  flex-shrink: 0;
  padding: 0.7rem 1.4rem;
  background: var(--page-news-accent-gradient);
  color: var(--color-white);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-family);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.page-news__subscribe-btn:hover,
.page-news__subscribe-btn:focus-visible {
  opacity: 0.9;
  transform: scale(1.02);
  outline: none;
}

.page-news__subscribe-note {
  font-size: 0.75rem;
  color: rgba(240, 244, 248, 0.55);
  margin: 0.75rem 0 0;
  max-width: 420px;
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-news__container {
    padding: 0 2rem;
    gap: 2.5rem;
  }

  .page-news__track {
    display: flex;
  }

  .page-news__content {
    padding: 3rem 0 5rem;
  }

  .page-news__page-title {
    font-size: 3.2rem;
  }

  .page-news__page-desc {
    font-size: 1.1rem;
  }

  .page-news__section-title {
    font-size: 2rem;
  }

  .page-news__timeline-item {
    gap: 1.5rem;
    padding: 0.5rem 0.75rem 1.75rem;
  }

  .page-news__timeline-marker {
    width: 60px;
  }

  .page-news__timeline-icon {
    width: 56px;
    height: 56px;
  }

  .page-news__timeline-heading {
    font-size: 1.3rem;
  }

  .page-news__timeline-text {
    font-size: 1rem;
  }

  .page-news__insights-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .page-news__insight-card:first-child {
    grid-column: 1 / -1;
    flex-direction: row;
  }

  .page-news__insight-card:first-child .page-news__insight-image-wrap {
    width: 45%;
    aspect-ratio: auto;
    min-height: 240px;
  }

  .page-news__insight-card:first-child .page-news__insight-content {
    padding: 1.5rem 2rem;
  }

  .page-news__subscribe-inner {
    flex-direction: row;
    padding: 2.5rem 3rem;
    text-align: left;
  }

  .page-news__subscribe-visual {
    order: 1;
  }

  .page-news__subscribe-image {
    width: 140px;
    height: 140px;
  }

  .page-news__subscribe-text {
    text-align: left;
  }

  .page-news__subscribe-form {
    margin: 0;
  }
}

@media (min-width: 1024px) {
  .page-news__container {
    padding: 0 3rem 0 2rem;
    gap: 3rem;
  }

  .page-news__track {
    width: 40px;
  }

  .page-news__page-title {
    font-size: 3.8rem;
  }

  .page-news__timeline-list {
    gap: 1.75rem;
  }

  .page-news__insights-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.75rem;
  }

  .page-news__insight-card:first-child .page-news__insight-image-wrap {
    width: 40%;
    min-height: 280px;
  }

  .page-news__subscribe-inner {
    padding: 3rem 4rem;
  }
}

/* ===== 窄屏安全 ===== */
@media (max-width: 420px) {
  .page-news__container {
    padding: 0 0.75rem;
  }

  .page-news__page-title {
    font-size: 1.8rem;
  }

  .page-news__timeline-marker {
    width: 36px;
  }

  .page-news__timeline-icon {
    width: 36px;
    height: 36px;
  }

  .page-news__timeline-dot {
    width: 12px;
    height: 12px;
  }

  .page-news__timeline-heading {
    font-size: 1rem;
  }

  .page-news__subscribe-form {
    flex-direction: column;
  }

  .page-news__subscribe-input {
    width: 100%;
  }

  .page-news__subscribe-btn {
    width: 100%;
  }

  .page-news__subscribe-image {
    width: 90px;
    height: 90px;
  }

  .page-news__insight-content {
    padding: 1rem 1.1rem 1.25rem;
  }
}

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

.page-news a:focus-visible,
.page-news button:focus-visible,
.page-news input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== 打印样式 ===== */
@media print {
  .page-news__track {
    display: none;
  }

  .page-news__subscribe {
    page-break-inside: avoid;
  }

  .page-news__insight-card {
    break-inside: avoid;
  }
}