/* 内容页：帮助 / 新闻 / 热门资讯（与首页同色系，独立布局） */
:root {
  --sf-blue: #2c6ae5;
  --sf-blue-2: #5c9eff;
  --sf-text: #1a1a2e;
  --sf-muted: #5a6a80;
  --sf-line: #e2e8f0;
  --sf-bg: #f8fafc;
}

.sf-page {
  background: var(--sf-bg);
  flex: 1 0 auto;
  min-height: calc(100vh - 160px);
  padding-bottom: 48px;
  color: var(--sf-text);
}

/* 标题区：整片上方渐变，居中，无分割线 */
.sf-page-hero {
  position: relative;
  padding: 44px 0 28px;
  text-align: center;
  border: 0;
  background: linear-gradient(180deg, #e3f2fd 0%, #eef4ff 38%, #f8fafc 100%);
}
.sf-page-hero h1 {
  margin: 0 0 10px;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--sf-text);
}
.sf-page-hero p {
  margin: 0 auto;
  max-width: 640px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--sf-muted);
}

.sf-page-search {
  display: flex;
  align-items: stretch;
  gap: 0;
  max-width: 560px;
  width: 100%;
  margin: 20px auto 0;
  border: 1px solid var(--sf-line);
  border-radius: 10px;
  background: #fff;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(44, 106, 229, 0.06);
}
.sf-page-search input {
  flex: 1;
  min-width: 0;
  height: 46px;
  padding: 0 16px;
  border: 0;
  border-radius: 0;
  background: transparent;
  font-size: 15px;
  color: var(--sf-text);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}
.sf-page-search input:focus {
  outline: none;
  box-shadow: none;
}
.sf-page-search button {
  flex-shrink: 0;
  height: 46px;
  padding: 0 18px;
  border: 0;
  border-left: 1px solid #0064ff;
  border-radius: 0;
  background: #0064ff;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.sf-page-search button:hover {
  background: #0064ff;
  color: #fff;
}

.sf-page-body {
  padding-top: 8px;
}

.sf-doc-layout {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* 分类标签：顶部横排 */
.sf-doc-side {
  position: static;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 0;
  box-shadow: none;
  padding: 0;
}
.sf-doc-side h4 {
  display: none;
}
.sf-doc-side a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  box-sizing: border-box;
  padding: 6px 12px;
  border: 1px solid var(--sf-line);
  border-radius: 6px;
  background: #fff;
  color: var(--sf-muted);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.35;
  font-weight: 500;
  transition: 0.15s;
}
.sf-doc-side a:hover {
  border-color: #c9dbff;
  background: #f3f8ff;
  color: var(--sf-blue);
}
.sf-doc-side a.active {
  border-color: var(--sf-blue);
  background: #ebf2ff;
  color: var(--sf-blue);
}

.sf-doc-main {
  min-width: 0;
  width: 100%;
  background: #fff;
  border: 1px solid var(--sf-line);
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.04);
  padding: 8px 0;
}

.sf-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.sf-list-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--sf-line);
  text-decoration: none;
  color: inherit;
  transition: background 0.15s;
}
.sf-list-item:last-child {
  border-bottom: none;
}
.sf-list-item:hover {
  background: #f8fafc;
}
.sf-list-date {
  flex-shrink: 0;
  width: 96px;
  padding-top: 3px;
  font-size: 13px;
  color: var(--sf-muted);
}
.sf-list-main {
  flex: 1;
  min-width: 0;
}
.sf-list-main h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--sf-text);
}
.sf-list-item:hover .sf-list-main h3 {
  color: var(--sf-blue);
}
.sf-list-main p {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--sf-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sf-list-arrow {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  color: #94a3b8;
}
.sf-list-item:hover .sf-list-arrow {
  color: var(--sf-blue);
}

.sf-empty {
  padding: 64px 24px;
  text-align: center;
  color: var(--sf-muted);
  font-size: 15px;
}
.sf-empty a {
  color: var(--sf-blue);
  text-decoration: none;
}
.sf-empty a:hover {
  text-decoration: underline;
}

.sf-pager {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  padding: 20px 16px 12px;
}
.sf-pager a,
.sf-pager span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--sf-line);
  border-radius: 6px;
  background: #fff;
  color: var(--sf-muted);
  font-size: 13px;
  text-decoration: none;
}
.sf-pager a:hover {
  border-color: #c9dbff;
  color: var(--sf-blue);
}
.sf-pager a.active {
  background: var(--sf-blue);
  border-color: var(--sf-blue);
  color: #fff;
}

.sf-article {
  padding: 24px 28px 28px;
}
.sf-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--sf-muted);
}
.sf-crumb a {
  color: var(--sf-blue);
  text-decoration: none;
}
.sf-crumb a:hover {
  text-decoration: underline;
}
.sf-article > h1 {
  margin: 0 0 12px;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--sf-text);
}
.sf-article-meta {
  margin: 0 0 22px;
  font-size: 13px;
  color: var(--sf-muted);
}
/* 正文：不覆盖后台编辑器样式，只做容器兜底 */
.sf-article-body {
  word-break: break-word;
  overflow-wrap: break-word;
  max-width: 100%;
}
.sf-article-body img {
  max-width: 100%;
  height: auto;
}

.sf-article-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--sf-line);
}
.sf-article-nav a {
  max-width: 48%;
  color: var(--sf-blue);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
}
.sf-article-nav a:hover {
  text-decoration: underline;
}
.sf-article-nav span {
  max-width: 48%;
  color: #94a3b8;
  font-size: 14px;
}

.sf-404 {
  text-align: center;
  padding: 80px 20px;
}
.sf-404 strong {
  display: block;
  font-size: 64px;
  line-height: 1;
  color: var(--sf-blue);
  margin-bottom: 16px;
}
.sf-404 p {
  color: var(--sf-muted);
  margin-bottom: 24px;
}
.sf-404 .btn-hero {
  display: inline-block;
}

@media (max-width: 900px) {
  .sf-doc-side a {
    padding: 6px 12px;
    border-radius: 6px;
  }
}

@media (max-width: 640px) {
  .sf-page-hero {
    padding: 32px 0 22px;
  }
  .sf-page-hero h1 {
    font-size: 26px;
  }
  .sf-page-search {
    max-width: 100%;
  }
  .sf-page-search input {
    font-size: 14px;
    height: 44px;
    padding: 0 12px;
  }
  .sf-page-search button {
    height: 44px;
    padding: 0 14px;
  }
  .sf-list-item {
    flex-wrap: wrap;
    gap: 8px;
    padding: 14px 16px;
  }
  .sf-list-date {
    width: auto;
  }
  .sf-list-arrow {
    display: none;
  }
  .sf-article {
    padding: 18px 16px 22px;
  }
  .sf-article > h1 {
    font-size: 22px;
  }
  .sf-article-nav a,
  .sf-article-nav span {
    max-width: 100%;
  }
}