/* 湖北萍安管业 · 技术文章页样式
   依赖 style.css 的语义令牌，不新增色值、不写死时长。
   只做一件事：让 2000 字以上的技术正文在桌面和手机上都好读。 */

/* ---------- 文章头 ---------- */
.art-head { background: var(--surface-hero); color: var(--ink-inv); position: relative; overflow: hidden; }
.art-image { margin: 28px 0 30px; }
.art-image img { display: block; max-width: 100%; width: auto; max-height: 520px; height: auto; object-fit: contain; margin: 0 auto; }
.art-image figcaption { color: var(--ink-2); font-size: 12px; line-height: 1.7; margin-top: 10px; }
@media (max-width: 600px) {
  .art-head .wrap { padding-left: 0; padding-right: 0; }
  .art-main { min-width: 0; }
  .art-cta { padding: 22px 18px; }
}
.art-head::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(1200px 420px at 88% -20%, rgba(62, 99, 221, 0.30), transparent 62%),
    radial-gradient(760px 300px at 8% 120%, rgba(247, 107, 21, 0.16), transparent 66%);
  pointer-events: none;
}
.art-head .wrap { position: relative; z-index: 2; padding: 54px 0 46px; }
.art-head h1 { font-size: clamp(24px, 3vw, 36px); line-height: 1.32; margin: 0 0 16px; max-width: 30em; }
.art-head .lede { color: var(--ink-inv-2); max-width: 52em; margin: 0; font-size: 15.5px; line-height: 1.75; }
.art-meta {
  display: flex; gap: 20px; flex-wrap: wrap; margin-top: 22px;
  font-size: 13px; color: var(--ink-inv-3); letter-spacing: 0.02em;
}
.art-meta span { display: inline-flex; align-items: center; gap: 6px; }
.art-meta b { color: var(--ink-inv-2); font-weight: 500; }

/* ---------- 两栏骨架 ---------- */
.art-body { padding: 56px 0 72px; }
.art-grid { display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 56px; align-items: start; }
@media (max-width: 1000px) {
  .art-grid { grid-template-columns: 1fr; gap: 0; }
  .art-toc { display: none; }
}

/* ---------- 目录 ---------- */
.art-toc { position: sticky; top: 26px; font-size: 13.5px; }
.art-toc .toc-t {
  font-size: 12px; letter-spacing: 0.16em; color: var(--ink-3);
  font-weight: 600; margin-bottom: 14px;
}
.art-toc ol { list-style: none; margin: 0; padding: 0 0 0 1px; border-left: 1px solid var(--line); }
.art-toc li { margin: 0; }
.art-toc a {
  display: block; padding: 7px 0 7px 14px; color: var(--ink-2);
  border-left: 2px solid transparent; margin-left: -1.5px; line-height: 1.5;
  transition: color var(--t-hover) var(--ease-out), border-color var(--t-hover) var(--ease-out);
}
.art-toc a:hover { color: var(--brand-ink); border-left-color: var(--slate-8); }
.art-toc a.on { color: var(--accent); border-left-color: var(--accent); font-weight: 600; }
.art-toc .toc-act { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); }
.art-toc .toc-act .tel { font-weight: 600; color: var(--brand-ink); font-size: 15px; }

/* ---------- 正文 ---------- */
.art-main { max-width: 74ch; }
.art-main > p:first-of-type { font-size: 16.5px; color: var(--ink); }
.art-main p { font-size: 15.8px; line-height: 1.9; margin: 0 0 18px; color: var(--ink); }
.art-main h2 {
  font-size: clamp(20px, 2.1vw, 25px); color: var(--brand-ink);
  margin: 52px 0 16px; padding-top: 8px; line-height: 1.4;
  scroll-margin-top: 20px;
}
.art-main h2:first-child { margin-top: 0; }
.art-main h3 { font-size: 17.5px; color: var(--brand-ink); margin: 32px 0 12px; line-height: 1.5; }
.art-main ul, .art-main ol { margin: 0 0 18px; padding-left: 22px; }
.art-main li { font-size: 15.8px; line-height: 1.85; margin-bottom: 8px; }
.art-main li::marker { color: var(--ink-3); }
.art-main strong { color: var(--brand-ink); font-weight: 600; }
.art-main a { color: var(--indigo-11); border-bottom: 1px solid var(--indigo-6); }
.art-main a:hover { border-bottom-color: var(--indigo-11); }
.art-main code {
  font-size: 0.92em; background: var(--slate-3); padding: 2px 6px;
  border-radius: 4px; color: var(--brand-ink);
}

/* 正文表格：手机端横向滚动，不挤压 */
.art-table-wrap { margin: 22px 0 26px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.art-table { width: 100%; border-collapse: collapse; font-size: 14.2px; min-width: 480px; }
.art-table caption {
  caption-side: top; text-align: left; font-size: 13px; color: var(--ink-2);
  padding-bottom: 10px;
}
.art-table th, .art-table td {
  border: 1px solid var(--line); padding: 9px 12px; text-align: left; line-height: 1.55;
}
.art-table thead th { background: var(--paper); color: var(--brand-ink); font-weight: 600; white-space: nowrap; }
.art-table tbody tr:nth-child(even) { background: var(--slate-1); }
.art-table td.num, .art-table th.num { text-align: right; font-variant-numeric: tabular-nums; }
.art-table tr.is-key td { background: var(--orange-2); font-weight: 600; }

/* 提示框：三种语气 */
.callout {
  border-left: 3px solid var(--slate-8); background: var(--paper);
  padding: 16px 20px; margin: 24px 0; font-size: 15px; line-height: 1.8;
}
.callout p:last-child { margin-bottom: 0; }
.callout b { color: var(--brand-ink); }
.callout.tip { border-left-color: var(--indigo-9); background: var(--indigo-3); }
.callout.warn { border-left-color: var(--orange-9); background: var(--orange-2); }
.callout .c-t {
  display: block; font-size: 12.5px; letter-spacing: 0.1em; font-weight: 600;
  color: var(--ink-2); margin-bottom: 6px;
}
.callout.warn .c-t { color: var(--orange-11); }
.callout.tip .c-t { color: var(--indigo-11); }

/* 关键数字 */
.stat-row { display: flex; gap: 14px; flex-wrap: wrap; margin: 26px 0; }
.stat-row > div {
  flex: 1 1 140px; border: 1px solid var(--line); padding: 16px 18px; background: var(--ink-inv);
}
.stat-row dt { font-size: 12.5px; color: var(--ink-2); margin-bottom: 8px; }
.stat-row dd {
  margin: 0; font-size: 22px; font-weight: 600; color: var(--brand-ink);
  font-variant-numeric: tabular-nums; letter-spacing: -0.01em;
}
.stat-row dd small { font-size: 13px; font-weight: 500; color: var(--ink-2); margin-left: 3px; }

/* ---------- FAQ ---------- */
.art-faq { margin-top: 56px; padding-top: 34px; border-top: 1px solid var(--line); }
.art-faq h2 { margin-top: 0; }
.faq-item { border-bottom: 1px solid var(--line-soft); padding: 18px 0; }
.faq-item:last-child { border-bottom: 0; }
.faq-item h3 { font-size: 16.5px; margin: 0 0 10px; color: var(--brand-ink); }
.faq-item p { margin: 0; font-size: 15.4px; line-height: 1.85; color: var(--ink); }

/* ---------- 文末 CTA ---------- */
.art-cta {
  margin-top: 52px; border: 1px solid var(--line); background: var(--paper);
  padding: 30px 32px; display: flex; gap: 26px; align-items: center;
  justify-content: space-between; flex-wrap: wrap;
}
.art-cta h2 { font-size: 20px; margin: 0 0 8px; color: var(--brand-ink); }
.art-cta p { margin: 0; font-size: 14.8px; color: var(--ink-2); max-width: 40em; line-height: 1.7; }
.art-cta .tel { font-weight: 600; color: var(--brand-ink); }

/* ---------- 相关文章 ---------- */
.art-rel { margin-top: 46px; }
.art-rel .rel-t { font-size: 12px; letter-spacing: 0.16em; color: var(--ink-3); font-weight: 600; margin-bottom: 16px; }
.rel-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.rel-list a {
  background: var(--ink-inv); padding: 18px 20px; display: block;
  transition: background var(--t-hover) var(--ease-out);
}
.rel-list a:hover { background: var(--paper); }
.rel-list b { display: block; font-size: 15px; color: var(--brand-ink); font-weight: 600; line-height: 1.5; margin-bottom: 6px; }
.rel-list span { font-size: 13px; color: var(--ink-2); line-height: 1.5; }

/* ---------- 文章中心 ---------- */
.blog-hero { background: var(--surface-hero); color: var(--ink-inv); padding: 58px 0 50px; position: relative; overflow: hidden; }
.blog-hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(1000px 380px at 90% -30%, rgba(62, 99, 221, 0.28), transparent 60%);
}
.blog-hero .wrap { position: relative; z-index: 2; }
.blog-hero h1 { font-size: clamp(26px, 3.2vw, 40px); margin: 0 0 14px; }
.blog-hero p { color: var(--ink-inv-2); max-width: 48em; margin: 0; font-size: 15.5px; line-height: 1.8; }
.blog-sec { padding: 52px 0; }
.blog-sec + .blog-sec { border-top: 1px solid var(--line); }
.blog-sec h2 { font-size: 22px; color: var(--brand-ink); margin: 0 0 8px; }
.blog-sec .sub { color: var(--ink-2); font-size: 14.5px; margin: 0 0 26px; }
.post-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.post-card { background: var(--ink-inv); padding: 24px 22px; display: flex; flex-direction: column; transition: background var(--t-hover) var(--ease-out); }
.post-card:hover { background: var(--paper); }
.post-card .pc-tag {
  font-size: 11.5px; letter-spacing: 0.12em; color: var(--accent); font-weight: 600;
  margin-bottom: 10px;
}
.post-card h3 { font-size: 16.5px; line-height: 1.5; margin: 0 0 10px; color: var(--brand-ink); font-weight: 600; }
.post-card p { font-size: 14px; line-height: 1.75; color: var(--ink-2); margin: 0 0 14px; }
.post-card .pc-more { margin-top: auto; font-size: 13px; color: var(--indigo-11); }