/* 小学语文知识库 — 简洁、正式、易读（仅作用于 .yuwen-wrap 内） */
.yuwen-wrap {
  --yw-ink: #1a2e22;
  --yw-accent: #2a5a3a;
  --yw-accent-soft: #e8f0ea;
  --yw-line: #e4e8e5;
  --yw-muted: #6b746e;
  --yw-text: #2c3330;
  --yw-bg: #f7f8f6;
  padding: 24px 0 48px;
  color: var(--yw-text);
  line-height: 1.7;
}

.yuwen-wrap a {
  color: var(--yw-accent);
  text-decoration: none;
}
.yuwen-wrap a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 面包屑 */
.yuwen-crumb {
  color: var(--yw-muted);
  font-size: 13px;
  margin: 0 0 16px;
  line-height: 1.5;
}
.yuwen-crumb a {
  color: var(--yw-muted);
}
.yuwen-crumb a:hover {
  color: var(--yw-accent);
}

/* 首页导语区 */
.yuwen-hero {
  padding: 8px 0 20px;
  border-bottom: 1px solid var(--yw-line);
  margin-bottom: 8px;
}
.yuwen-hero h1,
.yuwen-wrap > h1,
.yuwen-article > h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--yw-ink);
  margin: 0 0 10px;
  line-height: 1.35;
  letter-spacing: 0.02em;
}
.yuwen-wrap > h1 + .yuwen-search {
  margin: 12px 0 8px;
}
.yuwen-lead {
  color: var(--yw-muted);
  font-size: 15px;
  line-height: 1.75;
  margin: 0 0 18px;
  max-width: 42em;
}
.yuwen-hero .yuwen-lead {
  max-width: 36em;
}

/* 搜索 */
.yuwen-search {
  display: flex;
  gap: 0;
  max-width: 480px;
  border: 1px solid #c5cfc8;
  background: #fff;
}
.yuwen-search input {
  flex: 1;
  height: 42px;
  border: 0;
  padding: 0 14px;
  font-size: 15px;
  background: transparent;
  outline: none;
  min-width: 0;
}
.yuwen-search button {
  height: 42px;
  padding: 0 20px;
  border: 0;
  border-left: 1px solid #c5cfc8;
  background: var(--yw-accent);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.yuwen-search button:hover {
  background: #234c31;
}

/* 区块 */
.yuwen-section {
  margin-top: 32px;
  padding-top: 4px;
}
.yuwen-section > h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--yw-ink);
  margin: 0 0 14px;
  padding: 0 0 8px;
  border-bottom: 2px solid var(--yw-ink);
  letter-spacing: 0.04em;
}

/* 版本切换 */
.yuwen-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0 0 8px;
}
.yuwen-chips .chip {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid #c9d4cc;
  background: #fff;
  color: var(--yw-ink);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
}
.yuwen-chips .chip:hover {
  border-color: var(--yw-accent);
  text-decoration: none;
}
.yuwen-chips .chip.active,
.yuwen-grade-grid a.active {
  background: var(--yw-accent);
  border-color: var(--yw-accent);
  color: #fff;
  text-decoration: none;
}

/* 年级网格 */
.yuwen-grade-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.yuwen-grade-grid a {
  display: block;
  padding: 11px 8px;
  background: var(--yw-bg);
  border: 1px solid var(--yw-line);
  text-align: center;
  color: var(--yw-ink);
  font-size: 14px;
  text-decoration: none;
}
.yuwen-grade-grid a:hover {
  border-color: var(--yw-accent);
  background: var(--yw-accent-soft);
  text-decoration: none;
}

/* 词条 / 课文列表 */
.yuwen-term-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--yw-line);
}
.yuwen-term-list > li {
  padding: 14px 0;
  border-bottom: 1px solid var(--yw-line);
}
.yuwen-term-list > li.muted {
  border: 0;
  padding: 12px 0;
}
.yuwen-term-list a {
  font-size: 16px;
  font-weight: 600;
  color: var(--yw-ink);
  line-height: 1.45;
}
.yuwen-term-list a:hover {
  color: var(--yw-accent);
}
.yuwen-term-list .muted {
  display: inline-block;
  margin-left: 8px;
  font-weight: 400;
  vertical-align: middle;
}
.yuwen-term-list p {
  margin: 6px 0 0;
  color: var(--yw-muted);
  font-size: 14px;
  line-height: 1.65;
  max-width: 48em;
}

/* 行内链接组 */
.yuwen-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 4px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.yuwen-inline li {
  margin: 0;
}
.yuwen-inline a {
  display: inline-block;
  padding: 4px 10px;
  color: var(--yw-accent);
  font-size: 14px;
  border: 1px solid transparent;
}
.yuwen-inline a:hover {
  background: var(--yw-accent-soft);
  text-decoration: none;
}

/* 文章页 */
.yuwen-article {
  max-width: 720px;
}
.yuwen-article > h1 {
  font-size: 26px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--yw-line);
}
.yuwen-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  color: var(--yw-muted);
  font-size: 13px;
  margin: 14px 0 20px;
  padding: 0;
}
.yuwen-meta span {
  position: relative;
}
.yuwen-meta span + span::before {
  content: "";
  display: inline-block;
  width: 1px;
  height: 11px;
  background: #c8d0cb;
  margin-right: 16px;
  vertical-align: -1px;
}

.yuwen-content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--yw-text);
}
.yuwen-content p {
  margin: 0 0 1em;
}
.yuwen-content h2,
.yuwen-content h3 {
  color: var(--yw-ink);
  margin: 1.4em 0 0.6em;
  font-size: 17px;
}
.yuwen-content ul,
.yuwen-content ol {
  margin: 0 0 1em;
  padding-left: 1.4em;
}
.yuwen-content li {
  margin: 0.35em 0;
}
.yuwen-content blockquote {
  margin: 0 0 1em;
  padding: 10px 14px;
  border-left: 3px solid var(--yw-accent);
  background: var(--yw-bg);
  color: #3d4540;
}

.muted {
  color: var(--yw-muted);
  font-size: 13px;
}

/* 单元 */
.yuwen-unit {
  margin: 0 0 28px;
  padding: 0 0 4px;
}
.yuwen-unit h3 {
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--yw-accent);
  letter-spacing: 0.03em;
}
.yuwen-unit .yuwen-term-list {
  border-top: 0;
}
.yuwen-unit .yuwen-term-list > li:first-child {
  padding-top: 8px;
}

/* 日积月累提示区 */
.yuwen-yuandi {
  padding: 16px 18px;
  background: var(--yw-bg);
  border: 1px solid var(--yw-line);
  border-left: 3px solid var(--yw-accent);
}
.yuwen-yuandi > h2 {
  border-bottom: 0;
  padding-bottom: 0;
  margin-bottom: 8px;
}
.yuwen-yuandi .yuwen-lead {
  margin-bottom: 12px;
}
.yuwen-yuandi .yuwen-lead a {
  font-weight: 600;
  color: var(--yw-ink);
}

/* 相邻词条 */
.yuwen-pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin: 28px 0 4px;
  padding-top: 18px;
  border-top: 1px solid var(--yw-line);
  flex-wrap: wrap;
}
.yuwen-pager a {
  font-size: 14px;
  color: var(--yw-accent);
  max-width: 48%;
}
.yuwen-pager .next {
  margin-left: auto;
  text-align: right;
}

/* 模块内继续浏览（非站点 footer） */
.yuwen-footer-nav {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--yw-line);
}
.yuwen-footer-nav h3 {
  font-size: 14px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--yw-muted);
  letter-spacing: 0.04em;
}
.yuwen-footer-nav .yuwen-inline a {
  color: var(--yw-muted);
  border: 1px solid var(--yw-line);
  padding: 5px 11px;
  font-size: 13px;
}
.yuwen-footer-nav .yuwen-inline a:hover {
  color: var(--yw-accent);
  border-color: #b8c8bc;
  background: var(--yw-accent-soft);
}

@media (max-width: 720px) {
  .yuwen-wrap {
    padding: 16px 0 36px;
  }
  .yuwen-hero h1,
  .yuwen-wrap > h1,
  .yuwen-article > h1 {
    font-size: 22px;
  }
  .yuwen-grade-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .yuwen-article {
    max-width: none;
  }
  .yuwen-pager a {
    max-width: 100%;
  }
  .yuwen-pager .next {
    text-align: left;
    margin-left: 0;
  }
  .yuwen-search {
    max-width: none;
  }
}