:root {
  --bg: #f4f5fb;
  --bg-70: rgba(244, 245, 251, .82);
  --surface: #ffffff;
  --surface-2: #f8f9fe;
  --text: #191d2b;
  --muted: #5c6470;
  --border: #e4e7f0;
  --primary: #4f46e5;
  --primary-2: #7c3aed;
  --accent: #0ea5e9;
  --ok: #16a34a;
  --err: #dc2626;
  --err-bg: #fef2f2;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px rgba(16, 24, 40, .06);
  --shadow-lg: 0 2px 4px rgba(16, 24, 40, .05), 0 16px 40px rgba(16, 24, 40, .10);
  --radius: 14px;
  --mono: ui-monospace, "Cascadia Code", Consolas, "Courier New", monospace;
  --sans: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}
[data-theme="dark"] {
  --bg: #0e1016;
  --bg-2: rgba(14, 16, 22, .85);
  --surface: #171a24;
  --surface-2: #1d2130;
  --text: #e6e8f2;
  --muted: #9aa1b4;
  --border: #262c3d;
  --primary: #818cf8;
  --primary-2: #a78bfa;
  --accent: #38bdf8;
  --ok: #4ade80;
  --err: #f87171;
  --err-bg: rgba(248, 113, 113, .12);
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, .45), 0 16px 44px rgba(0, 0, 0, .42);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: none; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -9999px; top: 0; background: var(--primary); color: #fff; padding: 8px 16px; border-radius: 0 0 10px 0; z-index: 99; }
.skip:focus { left: 0; }

.bg-deco {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(640px 320px at 12% -6%, rgba(79, 70, 229, .14), transparent 60%),
    radial-gradient(560px 300px at 88% 4%, rgba(14, 165, 233, .12), transparent 60%),
    radial-gradient(520px 420px at 50% 108%, rgba(124, 58, 237, .10), transparent 60%);
}

.header {
  position: sticky; top: 0; z-index: 60;
  background: var(--bg-2);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-in { display: flex; align-items: center; gap: 26px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 17px; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 11px; flex: 0 0 auto;
  display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 6px 16px rgba(79, 70, 229, .35);
}
.brand-mark svg { width: 20px; height: 20px; }
.brand-mark.sm { width: 30px; height: 30px; border-radius: 9px; }
.brand-mark.sm svg { width: 16px; height: 16px; }
.brand-name em { font-style: normal; font-size: 12px; color: var(--muted); margin-left: 6px; font-weight: 500; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  color: var(--muted); font-weight: 600; font-size: 14px;
  padding: 7px 14px; border-radius: 9px; transition: .2s;
}
.nav a:hover { color: var(--text); background: var(--surface-2); }
.nav a.on { color: var(--primary); background: rgba(79, 70, 229, .10); }
.icon-btn {
  width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); color: var(--muted); cursor: pointer;
  display: grid; place-items: center; transition: .2s;
}
.icon-btn:hover { color: var(--primary); border-color: var(--primary); }
.icon-btn svg { width: 18px; height: 18px; }
.i-sun { display: none; }
[data-theme="dark"] .i-moon { display: none; }
[data-theme="dark"] .i-sun { display: block; }

.hero { padding: 56px 0 40px; text-align: center; }
.hero h1 { font-size: clamp(28px, 4.5vw, 44px); margin: 0 0 12px; letter-spacing: -.02em; }
.hero h1 .grad {
  background: linear-gradient(120deg, var(--primary), var(--accent) 55%, var(--primary-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { color: var(--muted); font-size: 16px; margin: 0 0 26px; max-width: 620px; margin-inline: auto; }
.search {
  max-width: 560px; margin: 0 auto; position: relative;
  display: flex; align-items: center; gap: 10px;
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: 999px; padding: 6px 8px 6px 18px; box-shadow: var(--shadow);
  transition: .2s;
}
.search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(79, 70, 229, .14); }
.search svg { width: 18px; height: 18px; color: var(--muted); flex: 0 0 auto; }
.search input {
  flex: 1; min-width: 0; border: 0; outline: 0; background: transparent;
  font-size: 15px; color: var(--text); font-family: var(--sans); padding: 6px 0;
}
.search button {
  border: 0; background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff; font-weight: 600; font-size: 14px; cursor: pointer;
  padding: 9px 22px; border-radius: 999px; transition: .2s;
}
.search button:hover { filter: brightness(1.12); }

.hero-stats { margin-top: 26px; display: flex; gap: 34px; justify-content: center; color: var(--muted); font-size: 13px; }
.hero-stats b { display: block; font-size: 20px; color: var(--text); }

.section { padding: 26px 0 8px; scroll-margin-top: 80px; }
.section-head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.section-head .gh {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; color: #fff; flex: 0 0 auto;
  box-shadow: 0 6px 16px rgba(16, 24, 40, .18);
}
.section-head .gh svg { width: 21px; height: 21px; }
.section-head h2 { font-size: 20px; margin: 0; }
.section-head span { color: var(--muted); font-size: 13px; }

.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.tool-card {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow); transition: transform .18s, box-shadow .18s, border-color .18s;
}
.tool-card:hover {
  transform: translateY(-3px); border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}
.tool-card .tc-ico {
  width: 44px; height: 44px; border-radius: 12px; flex: 0 0 auto;
  display: grid; place-items: center; transition: .2s;
}
.tool-card .tc-ico svg { width: 22px; height: 22px; }
.tool-card h3 { margin: 0 0 4px; font-size: 15px; color: var(--text); }
.tool-card p { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.tool-card .tc-go { align-self: center; margin-left: auto; color: var(--muted); opacity: 0; transition: .2s; }
.tool-card:hover .tc-go { opacity: 1; color: var(--primary); transform: translateX(2px); }
.no-result { display: none; text-align: center; color: var(--muted); padding: 44px 0; }
.no-result .big { font-size: 30px; margin-bottom: 8px; }

.main { min-height: 62vh; padding: 30px 0 60px; }
.tool-wrap { display: grid; grid-template-columns: 232px minmax(0, 1fr); gap: 24px; align-items: start; padding-top: 26px; padding-bottom: 60px; }
.side { position: sticky; top: 82px; max-height: calc(100vh - 100px); overflow-y: auto; }
.side::-webkit-scrollbar { width: 5px; }
.side::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.side-top { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); font-weight: 700; letter-spacing: .08em; margin: 2px 4px 12px; }
.dot-pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); position: relative; }
.dot-pulse::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 1px solid var(--ok); animation: pulse 1.8s ease-out infinite; }
@keyframes pulse { 0% { transform: scale(.4); opacity: 1; } 100% { transform: scale(1.25); opacity: 0; } }
.side-group { margin-bottom: 16px; }
.side-title { display: flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; padding: 0 8px; margin-bottom: 6px; }
.side-title .dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
.side ul { list-style: none; margin: 0; padding: 0; }
.side li a {
  display: block; padding: 7px 10px 7px 14px; margin: 1px 0;
  border-radius: 9px; font-size: 13.5px; color: var(--muted); transition: .15s;
}
.side li a:hover { color: var(--text); background: var(--surface-2); }
.side li a.on { color: var(--primary); background: rgba(79, 70, 229, .10); font-weight: 600; }
.side-select { display: none; width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font-size: 14px; }
.side-hidden { display: none !important; }

.crumbs { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); margin-bottom: 16px; flex-wrap: wrap; }
.crumbs b { color: var(--text); font-weight: 600; }
.crumbs span { color: var(--border); }

.tool-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 18px; box-shadow: var(--shadow); padding: 26px;
}
.tool-head { margin-bottom: 22px; }
.tool-head h1 { margin: 0 0 6px; font-size: 24px; letter-spacing: -.01em; }
.tool-head p { margin: 0; color: var(--muted); font-size: 14px; }

.tool-form { margin: 0; }
.field { margin-bottom: 16px; }
.field-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.field-head label { font-weight: 700; font-size: 14px; }
.field-head .spacer { flex: 1; }
.hint { color: var(--muted); font-size: 12px; }
.mcount { font-size: 12px; color: var(--muted); background: var(--surface-2); border: 1px solid var(--border); padding: 2px 9px; border-radius: 999px; }
textarea {
  width: 100%; min-height: 170px; resize: vertical;
  font-family: var(--mono); font-size: 13.5px; line-height: 1.65;
  color: var(--text); background: var(--surface-2);
  border: 1.5px solid var(--border); border-radius: 12px; padding: 13px 15px;
  outline: none; transition: border-color .15s, box-shadow .15s;
}
textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(79, 70, 229, .12); background: var(--surface); }
textarea#tout { background: var(--surface); }
input[type="text"], input[type="number"], input[type="datetime-local"], select {
  font-family: var(--sans); font-size: 14px; color: var(--text);
  background: var(--surface-2); border: 1.5px solid var(--border);
  border-radius: 10px; padding: 9px 12px; outline: none; transition: .15s;
}
input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(79, 70, 229, .13); }
select { cursor: pointer; }

.ctrl-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; margin-bottom: 18px; }
.ctrl-item { display: flex; flex-direction: column; gap: 6px; }
.ctrl-item small { font-size: 12px; color: var(--muted); font-weight: 600; }
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  border: 1.5px solid transparent; border-radius: 10px; cursor: pointer;
  font-family: var(--sans); font-size: 14px; font-weight: 600;
  padding: 9px 20px; transition: .18s; white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; box-shadow: 0 6px 16px rgba(79, 70, 229, .30); }
.btn-primary:hover { filter: brightness(1.12); transform: translateY(-1px); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 6px 13px; font-size: 13px; }
.action-row { display: flex; gap: 10px; margin-top: 4px; }

.check-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 9px; }
.check-item {
  display: flex; align-items: center; gap: 9px;
  border: 1.5px solid var(--border); border-radius: 10px; padding: 9px 12px;
  background: var(--surface-2); cursor: pointer; font-size: 13.5px; transition: .15s;
}
.check-item:hover { border-color: var(--primary); }
.check-item:has(input:checked) { border-color: var(--primary); background: rgba(79, 70, 229, .08); color: var(--primary); font-weight: 600; }
.check-item input { accent-color: var(--primary); width: 16px; height: 16px; }

.alert { padding: 12px 16px; border-radius: 11px; font-size: 13.5px; margin-bottom: 16px; border: 1px solid; }
.alert.err { background: var(--err-bg); border-color: rgba(220, 38, 38, .25); color: var(--err); }
.alert.ok { background: rgba(22, 163, 74, .09); border-color: rgba(22, 163, 74, .25); color: var(--ok); }

.result-rows { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin: 14px 0 18px; }
.result-row { background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; padding: 13px 16px; }
.result-row .k { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.result-row .v { font-size: 15px; font-weight: 700; word-break: break-all; }

.hi { background: rgba(79, 70, 229, .12); border-radius: 4px; padding: 0 3px; }

.md-split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
.md-col { margin-bottom: 0; }
.md-source, .md-preview { min-height: 480px; height: 560px; width: 100%; }
.md-preview { border: 1.5px solid var(--border); border-radius: 12px; background: #fff; display: block; }
.ocr-prev { min-height: 260px; height: 380px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (max-width: 860px) {
  .md-split { grid-template-columns: 1fr; }
  .md-source, .md-preview { height: 420px; min-height: 360px; }
}

.ocr-wait { text-align: center; padding: 46px 20px; }
.ocr-spinner {
  width: 52px; height: 52px; margin: 0 auto 18px; border-radius: 50%;
  border: 4px solid rgba(79, 70, 229, .14); border-top-color: var(--primary);
  animation: ocr-spin .9s linear infinite;
}
@keyframes ocr-spin { to { transform: rotate(360deg); } }
.ocr-wait h3 { margin: 0 0 6px; font-size: 17px; }
.ocr-wait p { margin: 0; }

#toast {
  position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 16px);
  background: var(--text); color: var(--bg); font-size: 14px; font-weight: 600;
  padding: 10px 22px; border-radius: 999px; opacity: 0; pointer-events: none;
  transition: opacity .25s, transform .25s; z-index: 100; box-shadow: var(--shadow-lg);
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }
[data-theme="dark"] #toast { color: #e6e8f2; }
@media (max-width: 900px) {
  .tool-wrap { grid-template-columns: 1fr; }
  .side { position: static; max-height: none; overflow: visible; }
  .side-group { display: none; }
  .side .side-top { display: none; }
  .side-select { display: block !important; margin-bottom: 16px; }
  .nav a { padding: 6px 10px; font-size: 13px; }
}
@media (max-width: 640px) {
  .brand-name em { display: none; }
  .header-in { gap: 12px; }
  .hero { padding: 38px 0 26px; }
  .tool-box { padding: 18px; border-radius: 14px; }
  .tool-card { padding: 13px; }
}