:root {
  --bg: #f5f7fa;
  --panel: #fff;
  --ink: #1f2430;
  --muted: #7b8494;
  --line: #e6eaf0;
  --brand: #2f6fed;
  --brand-soft: #eef4ff;
  --ok: #17a673;
  --err: #dc3545;
  --mono: ui-monospace, Consolas, "Courier New", monospace;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 15px; line-height: 1.65;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 顶栏：第一行 brand + 语言下拉，第二行分类导航 */
.top { background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; }
.topin { max-width: 1120px; margin: 0 auto; padding: 10px 20px; display: flex; flex-direction: column; gap: 8px; }
.toprow { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { font-size: 1.15rem; font-weight: 800; }
.logo { color: var(--ink); }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
/* 右上角语言下拉（与 brand 同行，hover 展开，语言在 LANGS 表中维护） */
.langbox { position: relative; flex-shrink: 0; }
.langbtn {
  display: inline-flex; align-items: center; gap: 2px;
  padding: 4px 12px; border: 1px solid var(--line); border-radius: 999px;
  font-size: 0.85rem; font-weight: 600; color: var(--ink); background: var(--bg); cursor: pointer;
}
.langbtn:hover, .langbox:focus-within .langbtn { border-color: var(--brand); color: var(--brand); }
.langdrop {
  display: none; position: absolute; top: 100%; right: 0; z-index: 70;
  min-width: 160px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 0 10px 10px 10px; box-shadow: 0 12px 28px rgba(31,36,48,.14);
  padding: 6px 0;
}
.langbox:hover .langdrop, .langbox:focus-within .langdrop { display: block; }
.langdrop a {
  display: block; padding: 7px 16px; font-size: 0.88rem; color: var(--ink);
}
.langdrop a:hover { background: var(--brand-soft); color: var(--brand); text-decoration: none; }
.langdrop a.on { color: var(--brand); font-weight: 700; }
.langdrop a.on::after { content: ' ✓'; font-size: 0.8em; }
.tab { padding: 6px 12px; border-radius: 8px; color: var(--ink); font-size: 0.94rem; }
.tab:hover { background: var(--brand-soft); color: var(--brand); text-decoration: none; }

/* ---------- 悬浮下拉导航 ---------- */
.navitem { position: relative; }
.navitem .caret { font-size: 0.72em; color: var(--muted); }
.navitem:hover .caret { color: var(--brand); }
.navdrop {
  display: none; position: absolute; top: 100%; left: 0; z-index: 60;
  min-width: 216px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 0 10px 10px 10px; box-shadow: 0 12px 28px rgba(31,36,48,.14);
  padding: 6px 0;
}
.navitem:hover .navdrop, .navitem:focus-within .navdrop { display: block; }
.navdrop .dropin { max-height: min(72vh, 560px); overflow-y: auto; overscroll-behavior: contain; }
.navdrop.cols2 .dropin { column-count: 2; column-gap: 0; min-width: 420px; }
.navdrop a {
  display: block; padding: 7px 16px; font-size: 0.88rem; color: var(--ink);
  break-inside: avoid;
}
.navdrop a:hover { background: var(--brand-soft); color: var(--brand); text-decoration: none; }
.navdrop .dgroup {
  margin: 0; padding: 9px 16px 3px; font-size: 0.76rem; color: var(--muted);
  border-top: 1px solid var(--line); break-inside: avoid;
}
.navdrop .dgroup:first-child { border-top: 0; }
/* 触屏/窄屏：点击展开（focus-within 已支持），宽度自适应不溢出 */
@media (max-width: 760px) {
  .navdrop, .navdrop.cols2 .dropin { min-width: 0; }
  .navdrop { left: auto; right: 0; }
  .navdrop.cols2 .dropin { column-count: 1; }
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 22px 20px 60px; }
.crumbs { font-size: 0.88rem; color: var(--muted); margin-bottom: 8px; }
.crumbs span { margin: 0 6px; color: #c8cedb; }
.crumbs em { font-style: normal; color: var(--muted); }
h1 { font-size: 1.55rem; margin: 6px 0 8px; }
h2.cat { font-size: 1.12rem; margin: 0 0 12px; display: flex; align-items: center; gap: 8px; }
h2.cat .cnt { font-size: 0.78rem; color: var(--muted); background: var(--panel); border: 1px solid var(--line); border-radius: 999px; padding: 0 8px; }
.intro { color: var(--muted); margin: 6px 0 18px; }

.hero { padding: 8px 0 4px; }
.searchwrap { margin: 14px 0 6px; }
.searchwrap input {
  width: 100%; max-width: 560px; padding: 12px 16px; font-size: 1rem;
  border: 1px solid var(--line); border-radius: 10px; background: var(--panel); outline: none;
}
.searchwrap input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }

.catblock { margin-bottom: 28px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 12px; }
.toolcard {
  position: relative; background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 3px; color: var(--ink);
}
.toolcard:hover { border-color: var(--brand); box-shadow: 0 3px 12px rgba(47,111,237,.10); text-decoration: none; }
.cname { font-weight: 600; font-size: 0.98rem; }
.cdesc { font-size: 0.83rem; color: var(--muted); line-height: 1.5; }
.badge { font-size: 0.66rem; font-weight: 800; border-radius: 4px; padding: 1px 5px; margin-left: 6px; vertical-align: 1px; }
.badge.hot { background: #fdecec; color: #d64545; }
.badge.new { background: #fff3e2; color: #d98219; }

/* 工具面板 */
.toolbox { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px; margin: 14px 0 24px; }
.toolbox label { display: block; font-size: 0.86rem; color: var(--muted); margin: 12px 0 5px; }
.toolbox textarea, .toolbox input[type=text], .toolbox input[type=number], .toolbox select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  font-family: var(--mono); font-size: 0.92rem; background: #fcfdff; color: var(--ink); outline: none;
}
.toolbox textarea { resize: vertical; min-height: 120px; }
.toolbox textarea:focus, .toolbox input:focus, .toolbox select:focus { border-color: var(--brand); }
.toolbox input[type=checkbox], .toolbox input[type=radio] { width: auto; }
.btnrow { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0 6px; }
.btn {
  background: var(--brand); color: #fff; border: none; border-radius: 8px;
  padding: 9px 18px; font-size: 0.93rem; cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: #fff; color: var(--brand); border: 1px solid var(--brand); }
.btn.gray { background: #eef1f5; color: var(--ink); border: 1px solid var(--line); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 760px) { .row2 { grid-template-columns: 1fr; } }
/* 左右双栏大编辑区：输入/输出并排，占满可视高度 */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: stretch; }
.duo .pane { display: flex; flex-direction: column; }
.duo .pane textarea { flex: 1; min-height: 480px; }
@media (max-width: 860px) { .duo { grid-template-columns: 1fr; } .duo .pane textarea { min-height: 220px; } }
/* row2 双栏（输入/输出各一列）同样加高 */
.row2 textarea { min-height: 320px; }

/* 工具内拖放区（图片转 Base64 等） */
.toolbox .drop { border: 2px dashed var(--line); border-radius: 10px; padding: 36px 16px; text-align: center; color: var(--muted); background: var(--panel); }
.toolbox .drop.on { border-color: var(--brand); background: var(--brand-soft); }

/* ---------- 全屏工作台布局（JSON 格式化等，参考站长工具风格） ---------- */
.wrap:has(> .wb) { max-width: none; padding-top: 0; padding-left: 12px; padding-right: 12px; }
.wb { display: flex; flex-direction: column; height: calc(100dvh - var(--toph, 92px)); min-height: 480px; margin-top: 0; }
.wbtabs { display: flex; overflow-x: auto; border: 1px solid var(--line); border-top: 0; border-bottom: 0; background: var(--panel); }
.wbtabs a { padding: 8px 14px; font-size: 0.88rem; color: var(--ink); border-right: 1px solid var(--line); white-space: nowrap; }
.wbtabs a:hover { background: var(--brand-soft); text-decoration: none; }
.wbtabs a.on { background: var(--brand); color: #fff; }
.wbtool { display: flex; flex-direction: column; flex: 1; min-height: 0; margin: 0; padding: 0; border-radius: 0; overflow: hidden; }
.wb-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 8px 10px; background: var(--panel); border-bottom: 1px solid var(--line); }
.wb-bar .wbsel { display: inline-flex; align-items: center; gap: 5px; margin: 0; font-size: 0.86rem; color: var(--muted); }
.wb-bar .btn { padding: 6px 14px; font-size: 0.86rem; }
.wb-bar .msg { margin: 0; }
.wb-panes { flex: 1; display: flex; min-height: 0; }
.wb-pane { flex: 1 1 0; display: flex; flex-direction: column; min-width: 0; }
.wb-pane + .wb-pane { border-left: 1px solid var(--line); }
.wb-cap { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 5px 12px; font-size: 0.8rem; color: var(--muted); background: var(--panel); border-bottom: 1px solid var(--line); }
.wb-cap .hint { font-weight: normal; }
.wb-pane textarea { flex: 1; width: 100%; min-height: 0; height: auto; border: 0; border-radius: 0; resize: none; padding: 10px 12px; font-family: var(--mono); font-size: 0.9rem; line-height: 1.55; background: #fff; }
.wb-pane textarea:focus { outline: none; box-shadow: none; }
@media (max-width: 760px) {
  .wb { height: auto; min-height: 0; }
  .wb-panes { flex-direction: column; }
  .wb-pane + .wb-pane { border-left: 0; border-top: 1px solid var(--line); }
  .wb-pane textarea { min-height: 200px; }
}

/* ---------- 工作台内的 duo/row2 双栏：与格式化页同尺寸，撑满视口 ---------- */
.wbtool .duo, .wbtool .row2 { flex: 1 1 0; min-height: 0; align-items: stretch; gap: 0; }
.wbtool .duo .pane, .wbtool .row2 > div { display: flex; flex-direction: column; min-height: 0; min-width: 0; padding: 0; }
.wbtool .duo .pane + .pane, .wbtool .row2 > div + div { border-left: 1px solid var(--line); }
.wbtool .duo label, .wbtool .row2 label {
  margin: 0; padding: 5px 12px; font-size: 0.8rem; color: var(--muted);
  background: var(--panel); border-bottom: 1px solid var(--line); border-radius: 0;
}
.wbtool .duo textarea, .wbtool .row2 textarea {
  flex: 1; min-height: 0; height: auto; resize: none;
  border: 0; border-radius: 0; padding: 10px 12px;
  font-family: var(--mono); font-size: 0.9rem; line-height: 1.55; background: #fff;
}
.wbtool .duo textarea:focus, .wbtool .row2 textarea:focus { outline: none; box-shadow: none; }
.wbtool .inline, .wbtool .btnrow {
  margin: 0; padding: 8px 10px; background: var(--panel);
  border-top: 1px solid var(--line); flex-wrap: wrap; align-items: center;
}
.wbtool .btnrow { gap: 8px; }
.wbtool .btnrow .btn { padding: 6px 14px; font-size: 0.86rem; }
.wbtool > .msg { margin: 0; padding: 6px 12px; border-top: 1px solid var(--line); background: var(--panel); }
@media (max-width: 760px) {
  .wbtool .duo, .wbtool .row2 { flex: none; }
  .wbtool .duo .pane + .pane, .wbtool .row2 > div + div { border-left: 0; border-top: 1px solid var(--line); }
  .wbtool .duo textarea, .wbtool .row2 textarea { min-height: 200px; }
}
.out {
  background: #f7f9fc; border: 1px solid var(--line); border-radius: 8px; padding: 12px;
  font-family: var(--mono); font-size: 0.92rem; white-space: pre-wrap; word-break: break-all; min-height: 44px;
}
.msg { font-size: 0.88rem; min-height: 1.2em; margin: 8px 0 0; color: var(--err); }
.msg.ok { color: var(--ok); }
.inline { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.inline label { margin: 0; display: flex; align-items: center; gap: 6px; color: var(--ink); font-size: 0.9rem; }
.hint { font-size: 0.82rem; color: var(--muted); }
table.tb { width: 100%; border-collapse: collapse; margin: 10px 0; }
.tb th, .tb td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; font-size: 0.9rem; }
.tb th { background: #f7f9fc; }
.tb td.mono, .mono { font-family: var(--mono); }

.usage, .faq, .related { margin: 22px 0; }
.usage h2, .faq h2, .related h2 { font-size: 1.1rem; }
.faq .qa h3 { font-size: 0.98rem; margin: 14px 0 3px; }
.faq .qa p { margin: 0; color: #414a5c; }
.note { color: var(--muted); font-size: 0.86rem; }

.foot { border-top: 1px solid var(--line); background: var(--panel); margin-top: 40px; }
.footin { max-width: 1120px; margin: 0 auto; padding: 22px 20px; color: var(--muted); font-size: 0.86rem; }
.footlinks a { margin-right: 14px; }

/* ---- 博客 ---- */
.postlist{display:grid;gap:14px;margin:18px 0}
.postcard{position:relative}
.postcard time{display:block;margin-top:8px;font-size:12px;color:var(--muted,#7b8794)}
.post{max-width:820px}
.post h1{margin-bottom:4px}
.postmeta{color:var(--muted,#7b8794);font-size:13px;margin:0 0 22px}
.post h2{font-size:20px;margin:28px 0 10px;border-left:3px solid #14b8a6;padding-left:10px}
.post p{line-height:1.8;margin:10px 0}
.post ul,.post ol{line-height:1.9;margin:10px 0 10px 22px}
.post li{margin:4px 0}
.post code{background:rgba(127,127,127,.14);padding:1px 6px;border-radius:4px;font-size:.92em}
.post strong{color:#0d9488}