/* ============================================================
   WORLD SILK 世界丝绸网 — 栏目页样式（八大栏目二级页）
   依赖 style.css 基础体系（CSS 变量 / 页眉导航 / 页脚 / 卡片）
   断点节奏与首页一致：≤1200 平板 · ≤1024 小平板 · ≤768 手机
   ============================================================ *//* ============================================================
   导航当前栏目高亮（金色底条）
   ============================================================ */
.nav-item.active {
  background: rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 -3px 0 var(--gold);
}.nav-item.active .nav-en { color: var(--gold-light); }.nav-item.active .nav-cn { color: #C6D0E6; }/* ============================================================
   栏目横幅 Channel Hero · 深绿渐变 + 面包屑 + 衬线大标题 + 水印
   ============================================================ */
.channel-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, #133062 0%, #0B1E3F 100%);
  padding: 42px var(--page-padding) 46px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex-shrink: 0;
}.channel-hero-watermark {
  position: absolute;
  right: -12px;
  bottom: -36px;
  font-family: var(--font-serif);
  font-size: 150px;
  font-weight: 700;
  letter-spacing: 6px;
  line-height: 1;
  color: rgba(255, 255, 255, 0.05);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}.breadcrumb {
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--primary-tint-2);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  position: relative;
}.breadcrumb a { color: var(--primary-tint-1); transition: color .2s; }.breadcrumb a:hover { color: var(--white); }.breadcrumb .sep { margin: 0 9px; color: rgba(255, 255, 255, 0.35); }.breadcrumb .current { color: var(--gold-light); font-weight: 600; }.channel-hero-title {
  display: flex;
  align-items: baseline;
  gap: 18px;
  flex-wrap: wrap;
  position: relative;
}.channel-hero-en {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1.15;
  color: var(--white);
}.channel-hero-cn {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 5px;
  color: var(--gold-light);
}.channel-hero-desc {
  margin: 0;
  max-width: 780px;
  font-size: 14px;
  line-height: 24px;
  color: var(--primary-tint-1);
  position: relative;
}/* ============================================================
   栏目主体容器
   ============================================================ */
.channel-main {
  padding: 48px var(--page-padding) 56px;
  display: flex;
  flex-direction: column;
  gap: 28px;
  flex: 1;
}.channel-main-ivory { background: var(--ivory); }/* 筛选标题行：左标题 + 右筛选标签 */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}.filter-bar .section-title { font-size: 22px; }.filter-tabs { display: flex; flex-wrap: wrap; gap: 10px; }.filter-tab {
  height: 36px;
  padding: 0 18px;
  border-radius: 18px;
  border: 1px solid var(--border-input);
  background: var(--white);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-body);
  cursor: pointer;
  transition: border-color .2s, color .2s, background .2s;
  white-space: nowrap;
}.filter-tab .tab-cn { font-size: 12px; font-weight: 400; opacity: .85; }.filter-tab:hover { border-color: var(--primary-tint-2); color: var(--primary); }.filter-tab.active { background: var(--primary); border-color: var(--primary); color: var(--white); }.filter-tab.active:hover { color: var(--white); }/* ============================================================
   文章列表行（新闻 / 可持续案例）
   ============================================================ */
.article-list {
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 6px 28px;
}.article-row {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}.article-row:last-child { border-bottom: none; }.article-thumb {
  width: 240px;
  height: 150px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: #EEF1F8;
}.article-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .3s; }.article-row:hover .article-thumb img { transform: scale(1.04); }.article-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 8px; }.article-meta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }.article-tag {
  height: 22px;
  padding: 0 11px;
  border-radius: 11px;
  background: var(--primary-bg);
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--primary);
  white-space: nowrap;
}.article-date { font-size: 12px; color: var(--text-muted); }.article-title-en {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-dark);
  line-height: 1.45;
  transition: color .2s;
}.article-row:hover .article-title-en { color: var(--primary); }.article-title-cn { font-size: 13px; color: var(--text-body); line-height: 1.5; }.article-excerpt { margin: 0; font-size: 13px; line-height: 22px; color: var(--text-body); }.article-more { font-size: 12px; font-weight: 600; color: var(--gold); letter-spacing: 1px; align-self: flex-start; transition: color .2s; }.article-row:hover .article-more { color: #9A7C42; }/* ============================================================
   分页器
   ============================================================ */
.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; flex-wrap: wrap; }.page-btn {
  min-width: 38px;
  height: 38px;
  padding: 0 12px;
  border-radius: 8px;
  border: 1px solid var(--border-input);
  background: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-body);
  transition: border-color .2s, color .2s, background .2s;
}.page-btn:hover { border-color: var(--primary); color: var(--primary); }.page-btn.active { background: var(--primary); border-color: var(--primary); color: var(--white); }.page-btn.active:hover { color: var(--white); }/* ============================================================
   报告宽列表行（日期块 + 双语标题 + 会员标签 + 下载钮）
   ============================================================ */
.report-list {
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}.report-item-wide { padding: 17px 24px; }.report-item-wide .report-en { font-size: 14px; }.report-item-wide .report-cn { font-size: 11.5px; }.report-vip-tag {
  height: 22px;
  padding: 0 11px;
  border-radius: 11px;
  background: var(--gold);
  display: inline-flex;
  align-items: center;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--white);
  white-space: nowrap;
  flex-shrink: 0;
}.report-download {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-bg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background .2s, color .2s;
  color: var(--primary);
}.report-item-wide:hover .report-download { background: var(--primary); color: var(--white); }/* ============================================================
   宽幅专题大卡（科技页焦点）
   ============================================================ */
.featured-banner-full { width: 100%; flex: none; }.ph-banner-full { height: 320px; }/* ============================================================
   信息卡网格（科技权益 / 组织架构等 · icon + 标题 + 描述）
   ============================================================ */
.info-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }.info-card {
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform .2s, box-shadow .2s;
}.info-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card-strong); }.info-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}.info-en { font-size: 15px; font-weight: 600; color: var(--primary); line-height: 1.3; }.info-cn { font-size: 12px; color: var(--text-body); }.info-desc { font-size: 12.5px; line-height: 21px; color: var(--text-body); margin: 0; }/* ============================================================
   会员等级卡（三档 · 中间深绿推荐）
   ============================================================ */
.tier-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }.tier-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}.tier-card.featured {
  background: var(--primary);
  border: none;
  box-shadow: 0 10px 28px rgba(13, 26, 58, 0.22);
}.tier-badge {
  align-self: flex-start;
  height: 24px;
  padding: 0 12px;
  border-radius: 12px;
  background: var(--gold);
  display: inline-flex;
  align-items: center;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--white);
}.tier-name-en { margin: 0; font-family: var(--font-serif); font-size: 21px; font-weight: 700; color: var(--primary); line-height: 1.25; }.tier-card.featured .tier-name-en { color: var(--white); }.tier-name-cn { font-size: 13px; font-weight: 600; color: var(--gold); letter-spacing: 2px; }.tier-for { font-size: 12px; color: var(--text-muted); margin: 0; }.tier-card.featured .tier-for { color: var(--primary-tint-1); }.tier-features { list-style: none; margin: 4px 0 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }.tier-features li { font-size: 12.5px; line-height: 19px; color: var(--text-body); display: flex; gap: 8px; }.tier-features li::before { content: "✓"; color: var(--gold); font-weight: 700; flex-shrink: 0; }.tier-card.featured .tier-features li { color: var(--primary-tint-1); }.tier-card .btn-green, .tier-card .btn-gold { margin-top: auto; align-self: stretch; height: 42px; }/* ============================================================
   申请流程步骤条（4 步）
   ============================================================ */
.steps-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }.step-card {
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  position: relative;
}.step-num {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
}.step-en { font-size: 14px; font-weight: 600; color: var(--primary); }.step-cn { font-size: 12px; color: var(--text-body); }.step-desc { font-size: 12px; line-height: 20px; color: var(--text-body); margin: 0; }/* ============================================================
   发展历程时间线（横向 4 节点 · 金点绿线）
   ============================================================ */
.timeline-row {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding-top: 24px;
}.timeline-row::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 10px;
  right: 10px;
  height: 2px;
  border-radius: 1px;
  background: linear-gradient(90deg, var(--gold), var(--primary-tint-2));
}.tl-item {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}.tl-item::before {
  content: "";
  position: absolute;
  top: -25px;
  left: 20px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(185, 151, 91, 0.22);
}.tl-year { font-family: var(--font-serif); font-size: 26px; font-weight: 700; color: var(--primary); line-height: 1; }.tl-en { font-size: 14px; font-weight: 600; color: var(--text-dark); }.tl-cn { font-size: 12px; color: var(--gold); font-weight: 600; letter-spacing: 1px; }.tl-desc { font-size: 12px; line-height: 20px; color: var(--text-body); margin: 0; }/* ============================================================
   联系方式卡（三列）
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }.contact-card {
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}.contact-label-en { font-size: 13px; font-weight: 700; letter-spacing: 1px; color: var(--primary); }.contact-label-cn { font-size: 12px; color: var(--gold); font-weight: 600; }.contact-value { font-size: 13px; line-height: 22px; color: var(--text-body); margin: 0; word-break: break-all; }/* ============================================================
   浅色会员标签墙（白底页面用）
   ============================================================ */
.chips-light { display: flex; flex-wrap: wrap; gap: 12px; }.chip-light {
  height: 38px;
  border-radius: 19px;
  background: var(--white);
  border: 1px solid var(--border);
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
  transition: border-color .2s, box-shadow .2s;
}.chip-light:hover { border-color: var(--primary-tint-2); box-shadow: var(--shadow-sm); }.chip-light-gold { background: var(--gold); border-color: var(--gold); color: var(--white); }.chip-light-gold:hover { border-color: var(--gold); box-shadow: 0 4px 14px rgba(185, 151, 91, 0.35); }/* ============================================================
   CTA 横幅（深绿渐变 · 各栏目页底部转化区）
   ============================================================ */
.cta-band {
  background: linear-gradient(120deg, #133062 0%, #0B1E3F 100%);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-lg);
  padding: 30px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}.cta-band-text { display: flex; flex-direction: column; gap: 7px; min-width: 0; }.cta-band-title { margin: 0; font-family: var(--font-serif); font-size: 24px; font-weight: 700; color: var(--white); line-height: 1.25; }.cta-band-desc { margin: 0; font-size: 13px; line-height: 21px; color: var(--primary-tint-1); max-width: 640px; }.cta-band .btn-gold { height: 46px; padding: 0 28px; flex-shrink: 0; }/* ============================================================
   ============================================================
   响应式断点
   ============================================================
   ============================================================ */

/* ---------- 平板 ≤1200px ---------- */
@media (max-width: 1200px) {
  .channel-hero { padding: 36px var(--page-padding) 40px; }
  .channel-hero-en { font-size: 34px; }
  .channel-hero-watermark { font-size: 110px; bottom: -26px; }

  .info-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline-row { grid-template-columns: repeat(2, 1fr); }
  .article-thumb { width: 200px; height: 132px; }
  .article-list { padding: 4px 24px; }
}/* ---------- 小平板 ≤1024px ---------- */
@media (max-width: 1024px) {
  .tier-grid { grid-template-columns: repeat(2, 1fr); }
  .tier-card.featured { grid-column: 1 / -1; }
  .steps-row { grid-template-columns: repeat(2, 1fr); }
  .featured-banner-full .ph-banner-full { height: 260px; }
}/* ---------- 手机 ≤768px ---------- */
@media (max-width: 768px) {
  .channel-hero { padding: 28px 16px 32px; gap: 11px; }
  .channel-hero-en { font-size: 26px; }
  .channel-hero-cn { font-size: 13px; letter-spacing: 3px; }
  .channel-hero-desc { font-size: 13px; line-height: 22px; }
  .channel-hero-watermark { font-size: 72px; bottom: -14px; letter-spacing: 3px; }
  .breadcrumb { font-size: 11px; }

  .channel-main { padding: 32px 16px 40px; gap: 22px; }
  .filter-bar { flex-direction: column; align-items: stretch; gap: 14px; }
  .filter-bar .section-title { font-size: 19px; }
  .filter-tabs { gap: 8px; }
  .filter-tab { height: 32px; padding: 0 14px; font-size: 12px; }
  .filter-tab .tab-cn { font-size: 11px; }

  .article-list { padding: 2px 16px; }
  .article-row { flex-direction: column; gap: 14px; padding: 20px 0; }
  .article-thumb { width: 100%; height: 180px; }
  .article-title-en { font-size: 15px; }
  .article-title-cn { font-size: 12px; }
  .article-excerpt { font-size: 12px; line-height: 20px; }

  .report-item-wide { padding: 13px 16px; gap: 10px; }
  .report-item-wide .report-en { font-size: 13px; }
  .report-download { width: 36px; height: 36px; }
  .report-vip-tag { display: none; } /* 手机端空间有限，隐藏标签保留下载 */

  .featured-banner-full .ph-banner-full { height: 185px; }

  .info-grid { grid-template-columns: 1fr; }
  .tier-grid { grid-template-columns: 1fr; }
  .tier-card.featured { grid-column: auto; }
  .tier-card { padding: 24px 20px; }
  .steps-row { grid-template-columns: 1fr; }
  .timeline-row { grid-template-columns: 1fr; padding-top: 0; gap: 20px; }
  .timeline-row::before { display: none; }
  .tl-item::before { top: -15px; }
  .timeline-row .tl-item:first-child::before { display: block; }
  .contact-grid { grid-template-columns: 1fr; }

  .cta-band { flex-direction: column; align-items: stretch; padding: 24px 20px; }
  .cta-band-title { font-size: 19px; }
  .cta-band .btn-gold { align-self: stretch; }

  .pagination { gap: 6px; }
  .page-btn { min-width: 34px; height: 34px; font-size: 13px; }
  .chip-light { height: 34px; padding: 0 16px; font-size: 11.5px; }
}/* ---------- 小屏手机 ≤380px ---------- */
@media (max-width: 380px) {
  .channel-hero-en { font-size: 22px; }
  .channel-hero-watermark { display: none; }
  .article-title-en { font-size: 14px; }
  .cta-band-title { font-size: 17px; }
}/* ---------- 触屏优化 ---------- */
@media (hover: none) {
  .info-card:hover, .article-row:hover .article-thumb img { transform: none; }
}/* ============================================================
   INSIGHT / STANDARDS / ACADEMIA / EXCHANGE 栏目页扩展
   ============================================================ */
/* 三列信息卡（研究领域 / 服务方向 / 合作机制等） */
.info-grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1200px) {.info-grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px)  {.info-grid-3 { grid-template-columns: 1fr; } }/* ---------- 图集网格（丝绸产品 · 图上文下卡片） ---------- */
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }.gallery-grid .tech-card { flex: none; }
@media (max-width: 1024px) {.gallery-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px)  {.gallery-grid { grid-template-columns: 1fr; } }

/* ---------- 年份筛选栏（新闻列表左侧，参照截图样式） ---------- */
.list-layout { display: flex; gap: 44px; align-items: flex-start; margin-top: 8px; }
.list-content { flex: 1; min-width: 0; }

.year-rail { flex: 0 0 84px; display: flex; flex-direction: column; align-items: stretch; padding-top: 4px; }
.year-btn {
  display: block; width: 100%; margin-bottom: 22px; padding: 11px 6px;
  background: var(--primary); color: #FFFFFF; border: none; border-radius: 6px;
  font-family: inherit; font-size: 13px; font-weight: 600; letter-spacing: 0.02em;
  text-align: center; cursor: pointer; transition: background 0.2s ease;
}
.year-btn:hover { background: var(--primary-hover); }
.year-btn.active { background: var(--primary); }

.year-item {
  position: relative; display: block; width: 100%; padding: 9px 0 0;
  background: none; border: none; cursor: pointer;
  font-family: inherit; font-size: 14px; color: #9AA3B2; text-align: center;
  transition: color 0.2s ease;
}
/* 年份下的小竖线刻度（时间轴样式） */
.year-item::after {
  content: ''; display: block; width: 2px; height: 16px;
  background: #D8DDE6; margin: 9px auto 0; border-radius: 1px;
}
.year-item:last-child::after { display: none; }
.year-item:hover { color: var(--primary); }
.year-item.active { color: var(--primary); font-weight: 700; }
.year-item.active::after { background: var(--primary); }

/* 年份筛选空状态 */
.list-empty {
  padding: 48px 20px; text-align: center; color: #7A8494; font-size: 14px;
  background: #FFFFFF; border: 1px dashed #D8DDE6; border-radius: 8px; margin-bottom: 24px;
}

@media (max-width: 900px) {
  .list-layout { flex-direction: column; gap: 20px; }
  .year-rail {
    flex: none; width: 100%; flex-direction: row; align-items: center;
    gap: 4px; overflow-x: auto; padding-bottom: 4px;
  }
  .year-btn { width: auto; margin-bottom: 0; padding: 9px 16px; white-space: nowrap; }
  .year-item { width: auto; padding: 0 10px; }
  .year-item::after { display: none; }
}

/* ---------- 学术出版：年份栏 + 封面卡片网格（参照用户截图） ---------- */
.pub-layout { display: flex; gap: 44px; align-items: flex-start; }
.pub-grid { flex: 1; min-width: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pub-card {
  display: flex; flex-direction: column; overflow: hidden;
  background: #FFFFFF; border: 1px solid var(--border); border-radius: 8px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.pub-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); }
.pub-cover { aspect-ratio: 3 / 4; overflow: hidden; position: relative; background: #EEF1F8; }
.pub-cover img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .35s ease; }
.pub-card:hover .pub-cover img { transform: scale(1.05); }
.pub-body { padding: 12px 14px 14px; display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.pub-title {
  width: 100%; font-size: 13px; font-weight: 600; line-height: 1.45; color: var(--text-dark);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.pub-btn {
  display: inline-block; padding: 6px 16px; border: 1px solid var(--primary); border-radius: 4px;
  font-size: 12px; font-weight: 600; color: var(--primary); letter-spacing: .02em;
  transition: background .2s ease, color .2s ease;
}
.pub-card:hover .pub-btn { background: var(--primary); color: #FFFFFF; }

@media (max-width: 1024px) { .pub-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 900px) {
  .pub-layout { flex-direction: column; gap: 20px; }
  .pub-layout .year-rail { flex: none; width: 100%; flex-direction: row; align-items: center; gap: 4px; overflow-x: auto; padding-bottom: 4px; }
  .pub-layout .year-btn { width: auto; margin-bottom: 0; padding: 9px 16px; white-space: nowrap; }
  .pub-layout .year-item { width: auto; padding: 0 10px; }
  .pub-layout .year-item::after { display: none; }
}
@media (max-width: 640px) { .pub-grid { grid-template-columns: 1fr; } }