/* prompt 主题 —— 「纸面 + 荧光笔」
   世界：印出来的备忘单，重点用黄色马克笔划过。黑墨按钮、发丝线、
   无阴影无渐变；提示词代码块是页面的主角：宽边框面板 + 右上角复制键。 */

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-dark);
  background: var(--c-light);
}

.wrap { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 50rem; }

a { color: var(--c-dark); text-decoration: underline; text-decoration-color: var(--c-line-dark); text-underline-offset: 4px; }
a:hover { text-decoration-color: var(--c-dark); background: var(--c-hl); }

:focus-visible { outline: 2px solid var(--c-dark); outline-offset: 2px; }

::selection { background: var(--c-hl); }

/* ---------- 顶栏 ---------- */

.topbar { background: var(--c-light); border-bottom: 1px solid var(--c-line); position: sticky; top: 0; z-index: 10; }
.topbar-in { display: flex; align-items: center; gap: 26px; min-height: 56px; padding: 6px 24px; max-width: var(--container); margin: 0 auto; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand:hover { background: none; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px;
  background: var(--c-dark); color: var(--c-hl);
  font-weight: 800; border-radius: var(--radius);
}
.brand-name { font-weight: 800; font-size: 17px; }
.topnav { display: flex; flex-wrap: wrap; gap: 2px 16px; }
.topnav a { text-decoration: none; font-size: 15px; }
.topnav a:hover { background: var(--c-hl); }

.searchbox { position: relative; margin-left: auto; }
.searchbox input {
  width: 220px; padding: 7px 12px;
  font-size: 14px; font-family: inherit;
  border: 1px solid var(--c-line-dark); border-radius: var(--radius);
  background: var(--c-light); color: inherit;
}
.searchbox input:focus { outline: 2px solid var(--c-dark); outline-offset: -1px; }

@media (max-width: 860px) {
  .topnav { display: none; }
}

/* 搜索结果浮层 */
.results {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 30;
  width: 320px; max-height: 420px; overflow-y: auto;
  background: var(--c-light); border: 1px solid var(--c-dark);
  box-shadow: 4px 4px 0 rgba(28, 27, 24, .12);
}
.r-title { font-size: 12.5px; padding: 8px 12px 6px; opacity: .6; }
.r-item { display: block; padding: 8px 12px; text-decoration: none; border-top: 1px solid var(--c-line); }
.r-item b { display: block; font-size: 14.5px; font-weight: 600; }
.r-item span { font-size: 12.5px; opacity: .6; }
.r-item:hover { background: var(--c-hl); }
.r-empty { padding: 14px 12px; font-size: 14px; opacity: .6; }

/* ---------- 首页 hero ---------- */

.hero { padding: 64px 0 36px; text-align: center; }
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; letter-spacing: .01em;
  display: inline; background: linear-gradient(transparent 58%, var(--c-hl) 58%);
}
.hero-sub { margin-top: 10px; opacity: .75; }
.hero-search { max-width: 30rem; margin: 26px auto 0; position: relative; }
.hero-search input {
  width: 100%; padding: 12px 16px; font-size: 16px; font-family: inherit;
  border: 1px solid var(--c-dark); border-radius: var(--radius);
  background: var(--c-light); color: inherit;
}
.hero-search .results { width: 100%; right: 0; }
.hero-hint { margin-top: 10px; font-size: 13.5px; opacity: .55; }

/* ---------- 分类条 ---------- */

.catstrip { display: flex; flex-wrap: wrap; gap: 10px; padding: 8px 0 26px; }
.cat {
  display: inline-flex; align-items: baseline; gap: 6px;
  padding: 4px 14px; font-size: 14.5px;
  border: 1px solid var(--c-line-dark); border-radius: 999px;
  text-decoration: none;
}
.cat em { font-style: normal; font-size: 12px; opacity: .55; }
.cat:hover, .cat.active { border-color: var(--c-dark); background: var(--c-hl); text-decoration: none; }

/* ---------- 提示词卡片 ---------- */

.pgrid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 18px; padding-bottom: 48px;
}
.pgrid.wide { grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); }

.pcard {
  display: flex; flex-direction: column; gap: 8px;
  border: 1px solid var(--c-line); border-radius: var(--radius);
  background: var(--c-light); padding: 16px 18px 14px;
}
.pcard:hover { border-color: var(--c-dark); }
.pcard-title { font-size: 16.5px; line-height: 1.5; font-weight: 700; }
.pcard-title a { text-decoration: none; }
.pcard-title a:hover { background: var(--c-hl); text-decoration: none; }
.pcard-model { font-size: 13.5px; opacity: .7; }
.pcard-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: auto; }
.pcard-cat {
  font-size: 12.5px; text-decoration: none;
  border-bottom: 2px solid var(--c-hl);
}
.pcard-cat:hover { background: var(--c-hl); }
.pcard-sum {
  font-size: 13.5px; opacity: .68;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

/* 难度方块 */
.diff { display: inline-flex; align-items: center; gap: 8px; }
.diff .sq { width: 9px; height: 9px; border: 1.5px solid var(--c-dark); display: inline-block; }
.diff .sq.on { background: var(--c-dark); }
.diff em { font-style: normal; font-size: 12.5px; opacity: .6; }

/* ---------- 详情页 ---------- */

.crumb { font-size: 14px; opacity: .78; padding-top: 22px; }
.crumb span { margin: 0 6px; }
.crumb a { text-decoration: none; }
.crumb a:hover { background: var(--c-hl); }

.doc { padding-bottom: 60px; }
.doc-title { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; line-height: 1.4; margin: 12px 0 10px; }
.doc-meta { display: flex; flex-wrap: wrap; gap: 6px 22px; font-size: 14px; opacity: .85; }
.doc-meta mark { background: var(--c-hl); padding: 0 4px; }
.doc-meta a { text-decoration: none; }
.doc-meta a:hover { background: var(--c-hl); }
.doc-meta .diff { gap: 6px; }

.doc-body { margin-top: 18px; }
.doc-body h2 {
  font-size: 1.15rem; font-weight: 700; margin: 34px 0 12px;
  display: inline-block; background: linear-gradient(transparent 62%, var(--c-hl) 62%);
}
.doc-body h3 { font-size: 1.02rem; margin: 24px 0 8px; }
.doc-body p { margin: 12px 0; }
.doc-body ul, .doc-body ol { margin: 12px 0; padding-left: 1.6em; }
.doc-body li { margin: 6px 0; }
.doc-body blockquote { border-left: 3px solid var(--c-line-dark); padding: 4px 16px; margin: 16px 0; opacity: .8; }
.doc-body code { font-family: var(--font-mono); font-size: .9em; background: var(--c-muted); padding: 2px 6px; border-radius: var(--radius); }

/* 提示词代码块：页面主角 */
.doc-body pre {
  position: relative;
  background: var(--c-muted); color: var(--c-dark);
  border: 1px solid var(--c-dark); border-left: 5px solid var(--c-dark);
  padding: 18px 96px 18px 20px; border-radius: var(--radius);
  overflow-x: auto; margin: 18px 0;
  font-family: var(--font-mono); font-size: 14.5px; line-height: 1.7;
  white-space: pre-wrap; word-break: break-word;
}
.doc-body pre:first-of-type { margin-top: 4px; }
.doc-body pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

.copy-btn {
  position: absolute; top: 10px; right: 10px;
  padding: 4px 14px; font-size: 13px; font-family: inherit; cursor: pointer;
  background: var(--c-dark); color: var(--c-light);
  border: 1px solid var(--c-dark); border-radius: var(--radius);
}
.copy-btn:hover { background: var(--c-dark); color: var(--c-hl); }
.copy-btn.done { background: var(--c-hl); color: var(--c-dark); border-color: var(--c-dark); }
.copy-btn:focus-visible { outline: 2px solid var(--c-dark); outline-offset: 2px; }

.doc-body table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px; }
.doc-body th, .doc-body td { border: 1px solid var(--c-line); padding: 8px 12px; text-align: left; }
.doc-body th { background: var(--c-muted); }
.doc-body img { max-width: 100%; height: auto; }
.doc-body hr { border: 0; border-top: 1px solid var(--c-line); margin: 26px 0; }

.doc-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }

.related { margin-top: 40px; }
.related h2 { font-size: 1.1rem; margin-bottom: 14px; }
.related-grid { padding-bottom: 0; }

.pager { display: flex; align-items: center; gap: 20px; border-top: 1px solid var(--c-line); margin-top: 40px; padding-top: 18px; font-size: 14px; }
.pager-a { text-decoration: none; }
.pager-a strong { display: block; font-size: 15px; text-decoration: underline; text-decoration-color: var(--c-line-dark); }
.pager-a.right { margin-left: auto; text-align: right; }
.pager .pager-n { margin: 0 auto; opacity: .65; font-variant-numeric: tabular-nums; }

/* ---------- 清单页 ---------- */

.list-head { padding: 30px 0 20px; }
.list-head h1 { font-size: 1.6rem; font-weight: 800; }
.list-count { font-size: 14px; opacity: .6; margin-top: 2px; }

.plist { list-style: none; padding-bottom: 56px; }
.plist li {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 16px;
  padding: 11px 2px; border-bottom: 1px dotted var(--c-line-dark);
}
.plist-t { text-decoration: none; font-weight: 600; }
.plist-t:hover { background: var(--c-hl); text-decoration: none; }
.plist-m { font-size: 13px; opacity: .6; }
.plist-d { margin-left: auto; font-size: 13px; opacity: .55; font-variant-numeric: tabular-nums; }

.tagcloud { display: flex; flex-wrap: wrap; gap: 10px; padding-bottom: 56px; }
.pill {
  display: inline-flex; align-items: baseline; gap: 5px;
  padding: 3px 12px; font-size: 14px;
  border: 1px solid var(--c-line-dark); border-radius: 999px; text-decoration: none;
}
.pill em { font-style: normal; font-size: 12px; opacity: .55; }
.pill:hover { border-color: var(--c-dark); background: var(--c-hl); text-decoration: none; }

.pager-off { opacity: .35; }

/* ---------- 页脚 ---------- */

.footer { border-top: 1px solid var(--c-line); }
.footer-in {
  display: flex; flex-wrap: wrap; gap: 8px 26px;
  padding: 26px 24px; font-size: 13.5px; opacity: .78;
}
.footer a { color: inherit; text-decoration: none; }
.footer a:hover { background: var(--c-hl); }