:root{
  --bg-ivory:#faf8f5;
  --deep-purple-gray:#2b2330; /* 深紫灰 */
  --text:#222223;
  --muted:#6b6b70;
  --accent:#9b87a6;
  --surface-white:#ffffff;
  --max-desktop-width:1320px;
  --gutter:28px;
  --type-scale:1rem;
}

/* 基础重置与排版 */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color:var(--text);
  background:var(--bg-ivory);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
  font-size:var(--type-scale);
}
.page-root{display:flex;flex-direction:column;min-height:100vh}

/* masthead 编辑部报头：深色背景，左右分置 */
.masthead{background:var(--deep-purple-gray);color:var(--surface-white);padding:12px 18px}
.masthead-inner{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto}
.site-link{color:inherit;text-decoration:none;font-weight:700;letter-spacing:0.02em}
.tool-breadcrumb{font-size:0.92rem;color:rgba(255,255,255,0.85)}
.tool-breadcrumb .sep{margin:0 8px;color:rgba(255,255,255,0.4)}

/* 广告槽样式（独立、不可悬浮） */
.ad-slot{max-width:var(--max-desktop-width);margin:12px auto;padding:10px;background:transparent;color:var(--muted);font-size:0.95rem;border:1px dashed rgba(0,0,0,0.06)}

/* 主布局容器 */
.layout-container{flex:1}
.grid-root{display:grid;grid-template-columns:1fr;gap:20px;max-width:1100px;margin:18px auto;padding:0 16px}

/* 主列 */
.main-col{order:1}
.title-band{display:grid;grid-template-columns:1fr;gap:18px;align-items:start}
.title-block{background:transparent}
.page-title{margin:0 0 10px 0;font-size:1.6rem;line-height:1.08;font-weight:700;color:var(--deep-purple-gray)}
.summary{margin:0 0 12px 0;color:var(--muted)}
.meta-inline{display:flex;gap:14px;font-size:0.9rem;color:var(--muted);flex-wrap:wrap}

/* 右侧窄元信息列（在移动端流式下移） */
.meta-col{background:var(--surface-white);padding:12px;border:1px solid rgba(0,0,0,0.04);box-shadow:none}
.info-block{border-top:1px solid rgba(0,0,0,0.04);padding:10px 0}
.info-label{font-size:0.75rem;color:var(--muted);margin-bottom:6px}
.info-value{font-size:0.95rem;color:var(--text);word-break:break-all}

/* 文章正文 */
.article{margin-top:18px;background:var(--surface-white);padding:20px;border:1px solid rgba(0,0,0,0.04)}
.article .content{color:var(--text);font-size:1rem}
.article p{margin:0 0 12px}

/* FAQ 列表容器（样式化 details/summary） */
.faq-section,.related-section{margin-top:18px}
.section-title{display:flex;align-items:center;font-size:1rem;margin:0 0 10px 0;color:var(--deep-purple-gray);font-weight:600}
/* 视觉签名：章节标题带短编号线（不自动生成编号，仅装饰） */
.section-title::before{content:"";display:inline-block;width:28px;height:4px;background:var(--deep-purple-gray);margin-right:10px;border-radius:0}

.faq-list details{border-top:1px solid rgba(0,0,0,0.06);padding:10px 0}
.faq-list summary{cursor:pointer;list-style:none;outline:none;font-weight:600}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list details[open] summary{color:var(--deep-purple-gray)}
.faq-list details p{margin:8px 0 0;color:var(--muted)}

.related-list{padding-left:20px;margin:0;color:var(--text)}
.related-list > li{margin:8px 0}

/* 右侧列：在桌面体现为杂志式错位安排 */
.right-col{display:none}
.side-sticky{position:relative}
.side-item.square{background:var(--surface-white);border:1px solid rgba(0,0,0,0.04);padding:14px;margin-bottom:18px}
.side-item .side-title{font-size:0.85rem;color:var(--muted);margin-bottom:8px}
.side-item .side-body{font-size:0.95rem;color:var(--text)}
.side-item.offset{margin-top:36px}

/* 底部 */
.site-footer{background:transparent;padding:22px 18px}
.footer-inner{max-width:var(--max-desktop-width);margin:0 auto;color:var(--muted);font-size:0.92rem}

/* MOBILE: 保证自然文档顺序并避免横向滚动 */
@media (max-width:767px){
  .grid-root{max-width:100%;margin:12px auto;padding:0 14px}
  .page-title{font-size:1.4rem}
  .meta-col{order:2}
  .title-block{order:1}
  .main-col{order:1}
  .right-col{display:none}
  .ad-slot{margin:10px 14px}
  /* 内容区确保在320px无横向滚动 */
  .article{padding:14px}
  .section-title::before{width:20px;height:3px;margin-right:8px}
}

/* DESKTOP: 非对称杂志网格，容器宽度限定在1120px—1440px范围内 */
@media (min-width:1024px){
  .grid-root{
    grid-template-columns:7fr 5fr;
    gap:28px;
    max-width:var(--max-desktop-width);
    margin:28px auto;
    /* 强制桌面容器宽度不小于1120px（合同要求） */
    min-width:1120px;
    width:100%;
    padding:0 20px;
  }

  .main-col{order:1}
  .right-col{display:block;order:2}

  /* 标题区域按 7/5 分栏：左侧大标题，右侧窄元信息 */
  .title-band{grid-template-columns:1fr;display:grid}
  .title-block{grid-column:1/2}
  .meta-col{grid-column:1/2}

  /* 将 meta-col 放置到右侧视觉列（在 DOM 仍保持可访问顺序） */
  .grid-root{align-items:start}
  .title-band{display:flex;gap:24px;align-items:flex-start}
  .title-block{flex:1 1 60%}
  .meta-col{flex:0 0 220px}

  /* 右侧侧边信息错位排列以形成杂志感 */
  .right-col{padding-top:34px}
  .side-item.offset{margin-top:48px}

  /* 标题更大，排版更稠密（技术资讯紧凑型） */
  .page-title{font-size:2.4rem;line-height:1.02}
  .summary{font-size:1.02rem}
  .article{padding:26px}
}