/* ===== 页面专属 CSS：.page-news ===== */
.page-news {
  --pn-deep-blue: #1A2A3A;
  --pn-orange: #FF6B35;
  --pn-green: #39FF14;
  --pn-dark-teal: #0B3D3D;
  --pn-light-gray: #F5F5F5;
  --pn-white: #FFFFFF;
  --pn-dark-gray: #333333;
  --pn-indigo: #4B0082;
  --pn-font-heading: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --pn-font-body: 'Helvetica Neue', Helvetica, Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --pn-font-mono: 'Courier New', 'Fira Code', monospace;
  --pn-radius: 12px;
  --pn-shadow: 0 4px 20px rgba(0,0,0,0.08);
  --pn-shadow-hover: 0 8px 36px rgba(0,0,0,0.16);
  --pn-transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

/* 容器 */
.page-news__container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px 60px;
  background-color: var(--pn-light-gray);
  position: relative;
}

/* 面包屑 */
.page-news__breadcrumb {
  padding: 20px 0 12px;
  font-family: var(--pn-font-body);
  font-size: 0.85rem;
  color: var(--pn-dark-gray);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.page-news__breadcrumb a {
  color: var(--pn-deep-blue);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--pn-transition);
}
.page-news__breadcrumb a:hover {
  color: var(--pn-orange);
}
.breadcrumb__sep {
  color: var(--pn-indigo);
  font-weight: 300;
  margin: 0 2px;
}

/* 首屏英雄区 */
.page-news__hero {
  padding: 30px 0 40px;
  border-bottom: 3px solid var(--pn-orange);
  margin-bottom: 48px;
  position: relative;
}
.page-news__hero-title {
  font-family: var(--pn-font-heading);
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  font-weight: 700;
  color: var(--pn-deep-blue);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
  line-height: 1.1;
  position: relative;
  display: inline-block;
}
.page-news__hero-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 60px;
  height: 4px;
  background: var(--pn-orange);
  border-radius: 2px;
}
.page-news__hero-desc {
  font-family: var(--pn-font-body);
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: var(--pn-dark-gray);
  max-width: 620px;
  line-height: 1.6;
  margin: 16px 0 0;
}
.page-news__hero-line {
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, var(--pn-indigo) 0%, transparent 100%);
  margin-top: 20px;
  opacity: 0.4;
}

/* 章节通用 */
.page-news__section {
  padding: 48px 0;
  position: relative;
}
.page-news__section--alt {
  background: var(--pn-white);
  border-radius: var(--pn-radius);
  padding: 48px 28px;
  box-shadow: var(--pn-shadow);
  margin: 40px 0;
}
.page-news__section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
}
.page-news__section-title {
  font-family: var(--pn-font-heading);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--pn-deep-blue);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}
.page-news__section-num {
  font-family: var(--pn-font-mono);
  font-size: 0.7em;
  color: var(--pn-orange);
  background: rgba(255,107,53,0.12);
  padding: 2px 10px;
  border-radius: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.page-news__section-intro {
  font-family: var(--pn-font-body);
  font-size: 1rem;
  color: var(--pn-dark-gray);
  max-width: 540px;
  line-height: 1.5;
  margin: 0;
}
.page-news__section-footer {
  margin-top: 36px;
  display: flex;
  justify-content: flex-start;
}

/* 列表容器 */
.page-news__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

/* 卡片 — 左图右文 */
.page-news__card {
  display: flex;
  flex-direction: column;
  background: var(--pn-white);
  border-radius: var(--pn-radius);
  overflow: hidden;
  box-shadow: var(--pn-shadow);
  transition: transform var(--pn-transition), box-shadow var(--pn-transition);
  cursor: default;
}
.page-news__card:hover {
  box-shadow: var(--pn-shadow-hover);
  transform: translateY(-3px);
}
.page-news__card-img-wrap {
  width: 100%;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--pn-dark-teal);
  position: relative;
}
.page-news__card-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.page-news__card:hover .page-news__card-img {
  transform: scale(1.04);
}
.page-news__card-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.page-news__card-title {
  font-family: var(--pn-font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--pn-deep-blue);
  margin: 0;
  line-height: 1.3;
}
.page-news__card-summary {
  font-family: var(--pn-font-body);
  font-size: 0.92rem;
  color: var(--pn-dark-gray);
  line-height: 1.55;
  margin: 0;
  flex: 1;
}
.page-news__card-meta {
  font-family: var(--pn-font-mono);
  font-size: 0.75rem;
  color: var(--pn-indigo);
  letter-spacing: 0.03em;
  opacity: 0.7;
  margin-top: 6px;
}

/* 按钮 */
.page-news__btn {
  display: inline-block;
  padding: 10px 28px;
  font-family: var(--pn-font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--pn-white);
  background: var(--pn-orange);
  border-radius: 30px;
  text-decoration: none;
  transition: background var(--pn-transition), transform var(--pn-transition);
  letter-spacing: 0.02em;
}
.page-news__btn:hover {
  background: #e55a2b;
  transform: translateY(-2px);
}
.page-news__btn--cta {
  background: var(--pn-deep-blue);
}
.page-news__btn--cta:hover {
  background: #0f1e2e;
}

/* 底部 CTA */
.page-news__cta {
  margin-top: 56px;
  padding: 32px 24px;
  background: var(--pn-deep-blue);
  border-radius: var(--pn-radius);
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  text-align: center;
}
.page-news__cta-text {
  font-family: var(--pn-font-body);
  font-size: 1.1rem;
  color: var(--pn-white);
  margin: 0;
  max-width: 480px;
  line-height: 1.5;
}

/* ===== 平板 ===== */
@media (min-width: 640px) {
  .page-news__list {
    gap: 28px;
  }
  .page-news__card {
    flex-direction: row;
    align-items: stretch;
  }
  .page-news__card-img-wrap {
    width: 260px;
    min-height: 180px;
  }
  .page-news__card-body {
    padding: 24px 28px;
  }
  .page-news__card-title {
    font-size: 1.3rem;
  }
  .page-news__section--alt {
    padding: 48px 36px;
  }
  .page-news__cta {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
    padding: 36px 40px;
  }
}

/* ===== 桌面 ===== */
@media (min-width: 1024px) {
  .page-news__container {
    padding: 0 40px 80px;
  }
  .page-news__hero {
    padding: 40px 0 50px;
    margin-bottom: 56px;
  }
  .page-news__hero-title {
    font-size: 4rem;
  }
  .page-news__list {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .page-news__card {
    flex-direction: row;
  }
  .page-news__card-img-wrap {
    width: 280px;
    min-height: 200px;
  }
  .page-news__section--alt {
    padding: 60px 48px;
  }
  .page-news__section-head {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
  .page-news__section-intro {
    text-align: right;
    max-width: 400px;
  }
  .page-news__cta {
    padding: 40px 56px;
    margin-top: 64px;
  }
  .page-news__cta-text {
    font-size: 1.2rem;
  }
}

/* ===== 大屏 ===== */
@media (min-width: 1440px) {
  .page-news__list {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .page-news__card {
    flex-direction: column;
  }
  .page-news__card-img-wrap {
    width: 100%;
    height: 200px;
  }
  .page-news__hero-title {
    font-size: 4.8rem;
  }
}

/* 移动端微调 */
@media (max-width: 480px) {
  .page-news__container {
    padding: 0 14px 40px;
  }
  .page-news__hero {
    padding: 20px 0 28px;
    margin-bottom: 32px;
  }
  .page-news__card-body {
    padding: 16px 18px 20px;
  }
  .page-news__section {
    padding: 32px 0;
  }
  .page-news__section--alt {
    padding: 28px 16px;
  }
  .page-news__cta {
    padding: 24px 18px;
  }
}