/* ZUX工具 - 全站样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #3370ff;
  --primary-hover: #2860e1;
  --primary-light: #e8f0ff;
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --border: #e5e8ef;
  --text: #1f2329;
  --text-2: #51565d;
  --text-3: #8f959e;
  --danger: #e5484d;
  --success: #2ea44f;
  --warning: #ff8800;
  --radius: 10px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.65;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }
img, svg { vertical-align: middle; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.mono, textarea.mono, pre, code, kbd { font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, "Courier New", monospace; }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .92);
  -webkit-backdrop-filter: saturate(1.4) blur(8px);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); letter-spacing: .3px; }
.logo:hover { color: var(--text); }
.logo-mark {
  width: 30px; height: 30px; border-radius: 8px; flex: none;
  background: linear-gradient(135deg, #3370ff, #5a8bff);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800;
}
.nav { display: flex; align-items: center; gap: 24px; }
.nav a { color: var(--text-2); font-size: 14px; }
.nav a:hover, .nav a.active { color: var(--primary); }

/* ---------- 首页 Hero ---------- */
.hero { padding: 72px 0 36px; text-align: center; background: linear-gradient(180deg, #f0f5ff 0%, #ffffff 90%); }
.hero-title { font-size: 40px; font-weight: 700; letter-spacing: 1px; }
.hero-title em { font-style: normal; color: var(--primary); }
.hero-sub { margin: 14px auto 0; max-width: 560px; color: var(--text-2); font-size: 16px; }
.hero-sub b { color: var(--text); font-weight: 600; }
.search-box {
  display: flex; align-items: center; position: relative;
  max-width: 560px; margin: 30px auto 0; height: 52px;
  background: #fff; border: 1px solid var(--border); border-radius: 26px;
  padding: 0 6px 0 0; transition: .15s;
}
.search-box svg { position: absolute; left: 18px; top: 50%; transform: translateY(-50%); color: var(--text-3); pointer-events: none; z-index: 1; }
.search-box input[type=text] {
  flex: 1; min-width: 0; height: 100%; border: none; border-radius: 26px 0 0 26px;
  padding: 0 12px 0 48px; font-size: 15px; color: var(--text); outline: none; background: transparent;
}
.search-box input[type=text]:focus { border: none; box-shadow: none; }
.search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(51, 112, 255, .12); }
.search-box .btn { height: 40px; border-radius: 20px; padding: 0 24px; flex: none; }
.hero-stats { margin-top: 22px; font-size: 13px; color: var(--text-3); }
.hero-stats b { color: var(--primary); }

/* ---------- 首页工具分区 ---------- */
.section { padding-top: 40px; }
.section-title { display: flex; align-items: baseline; gap: 10px; font-size: 20px; font-weight: 600; margin-bottom: 18px; }
.section-title small { font-size: 13px; font-weight: 400; color: var(--text-3); }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(236px, 1fr)); gap: 16px; }
.tool-card {
  display: block; background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 18px 16px; transition: .2s;
}
.tool-card:hover { border-color: #d4dce9; box-shadow: 0 6px 18px rgba(31, 35, 41, .07); transform: translateY(-2px); }
.tool-card-head { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.tool-icon { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; flex: none; }
.tool-icon svg { width: 21px; height: 21px; }
.tool-card h3 { font-size: 15px; font-weight: 600; color: var(--text); }
.tool-card p { font-size: 13px; color: var(--text-3); line-height: 1.55; }
.no-result { display: none; padding: 48px 0; text-align: center; color: var(--text-3); }

/* 图标配色 */
.ic-blue   { background: #e8f0ff; color: #3370ff; }
.ic-green  { background: #e7f7ea; color: #1ca34f; }
.ic-orange { background: #fff3e6; color: #f57900; }
.ic-purple { background: #f1edff; color: #7b61ff; }
.ic-pink   { background: #fff0f6; color: #eb2f96; }
.ic-teal   { background: #e6faf8; color: #0fa891; }

/* ---------- 内页 ---------- */
.breadcrumb { padding-top: 16px; font-size: 13px; color: var(--text-3); }
.breadcrumb a { color: var(--text-3); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { margin: 0 8px; color: #c6cad1; }

.page-head { padding: 28px 0 22px; }
.page-head h1 { font-size: 27px; font-weight: 700; }
.page-head p { margin-top: 8px; color: var(--text-2); font-size: 14px; }

.card { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 24px; }

.form-row { margin-bottom: 16px; }
.form-row:last-child { margin-bottom: 0; }
.form-row > label { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 6px; }

textarea, input[type=text], input[type=number], input[type=datetime-local], select {
  width: 100%; border: 1px solid var(--border); border-radius: 8px;
  padding: 9px 12px; font-size: 14px; color: var(--text); background: #fff;
  outline: none; transition: border-color .15s, box-shadow .15s; font-family: inherit;
}
textarea { min-height: 150px; resize: vertical; line-height: 1.6; }
textarea:focus, input[type=text]:focus, input[type=number]:focus,
input[type=datetime-local]:focus, select:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(51, 112, 255, .1);
}
select { cursor: pointer; }

.btn-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin: 16px 0; }
.btn-row:first-child { margin-top: 0; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 38px; padding: 0 18px; border-radius: 8px; border: 1px solid transparent;
  font-size: 14px; font-weight: 500; cursor: pointer; transition: .15s;
  background: var(--primary); color: #fff; user-select: none;
}
.btn:hover { background: var(--primary-hover); }
.btn-outline { background: #fff; color: var(--text); border-color: var(--border); }
.btn-outline:hover { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn:disabled { opacity: .55; cursor: not-allowed; }

.result-box {
  margin-top: 16px; background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 16px; font-size: 14px; min-height: 46px;
  word-break: break-all; white-space: pre-wrap; color: var(--text);
}
.result-box:empty { display: none; }
.error-text { color: var(--danger); }
.ok-text { color: var(--success); }
.muted { color: var(--text-3); font-size: 13px; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-top: 18px; }
.stat-item { background: var(--bg-soft); border-radius: 8px; padding: 14px 8px; text-align: center; }
.stat-item b { display: block; font-size: 22px; color: var(--primary); font-weight: 700; }
.stat-item span { font-size: 12px; color: var(--text-2); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.tip { margin-top: 14px; font-size: 13px; color: var(--text-3); }

/* 二维码 */
.qr-stage { display: flex; align-items: center; justify-content: center; min-height: 220px; background: var(--bg-soft); border-radius: 8px; padding: 20px; margin-top: 4px; }
.qr-stage img, .qr-stage canvas { background: #fff; border-radius: 6px; }
.qr-placeholder { color: var(--text-3); font-size: 14px; }

/* 密码强度 */
.strength-bar { height: 8px; border-radius: 4px; background: var(--border); overflow: hidden; margin-top: 10px; }
.strength-bar i { display: block; height: 100%; width: 0; border-radius: 4px; transition: width .25s, background .25s; }
.pw-display { font-size: 22px; font-weight: 600; letter-spacing: 1px; word-break: break-all; color: var(--text); }
.checks { display: flex; flex-wrap: wrap; gap: 14px 22px; }
.checks label { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: var(--text-2); cursor: pointer; }
.checks input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--primary); cursor: pointer; }
input[type=range] { width: 100%; accent-color: var(--primary); cursor: pointer; }

/* 颜色 */
.color-preview { width: 100%; height: 72px; border-radius: 8px; border: 1px solid var(--border); }
.color-picker-row { display: flex; align-items: center; gap: 14px; }
.color-picker-row input[type=color] { width: 56px; height: 40px; border: 1px solid var(--border); border-radius: 8px; background: #fff; padding: 2px; cursor: pointer; }
.color-picker-row .val { font-size: 14px; color: var(--text-2); }

/* BMI / 计算结果 */
.big-result { text-align: center; padding: 8px 0 4px; }
.big-result .num { font-size: 42px; font-weight: 700; color: var(--primary); line-height: 1.2; }
.big-result .num small { font-size: 15px; font-weight: 400; color: var(--text-3); margin-left: 4px; }
.level-pill { display: inline-block; margin-top: 6px; padding: 3px 14px; border-radius: 14px; font-size: 13px; font-weight: 500; }
.lv-blue   { background: #e8f0ff; color: #3370ff; }
.lv-green  { background: #e7f7ea; color: #1ca34f; }
.lv-orange { background: #fff3e6; color: #f57900; }
.lv-red    { background: #ffecec; color: #e5484d; }

/* 单位换算 tabs */
.cats { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.cats button {
  height: 32px; padding: 0 14px; border-radius: 16px; border: 1px solid var(--border);
  background: #fff; color: var(--text-2); font-size: 13px; cursor: pointer; transition: .15s;
}
.cats button:hover { border-color: var(--primary); color: var(--primary); }
.cats button.on { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 时间戳 */
.ts-live { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; background: var(--bg-soft); border-radius: 8px; padding: 14px 16px; }
.ts-live b { font-size: 20px; font-family: Consolas, monospace; color: var(--primary); }
.divider { border: 0; border-top: 1px solid var(--border); margin: 22px 0; }
.kv-list { display: grid; gap: 8px; }
.kv-list .kv { display: flex; gap: 10px; font-size: 14px; }
.kv-list .kv i { font-style: normal; color: var(--text-3); flex: none; width: 88px; }
.kv-list .kv b { font-weight: 500; word-break: break-all; }

/* ---------- 说明区 ---------- */
.info-section { padding: 36px 0 8px; }
.info-section h2 { font-size: 18px; font-weight: 600; margin: 26px 0 12px; }
.info-section h2:first-child { margin-top: 0; }
.info-section p, .info-section li { color: var(--text-2); font-size: 14px; }
.info-section ul { padding-left: 20px; }
.info-section li { margin: 4px 0; }

.faq details { border: 1px solid var(--border); border-radius: 8px; background: #fff; padding: 12px 16px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-size: 14px; font-weight: 500; color: var(--text); }
.faq details[open] summary { margin-bottom: 6px; }
.faq p { margin-top: 4px; }

/* 相关工具 */
.related { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.related a { display: inline-block; padding: 6px 14px; border: 1px solid var(--border); border-radius: 16px; font-size: 13px; color: var(--text-2); transition: .15s; }
.related a:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-soft); margin-top: 56px; padding: 36px 0 26px; }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 28px; }
.footer-brand { max-width: 320px; }
.footer-brand .logo { margin-bottom: 10px; }
.footer-brand p { font-size: 13px; color: var(--text-3); }
.footer-col h4 { font-size: 14px; font-weight: 600; margin-bottom: 10px; }
.footer-col a { display: block; font-size: 13px; color: var(--text-2); padding: 3px 0; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom { margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--border); text-align: center; font-size: 13px; color: var(--text-3); }
.footer-bottom a { color: var(--text-3); }
.footer-bottom a:hover { color: var(--primary); }
.footer-bottom .split { margin: 0 8px; color: #c6cad1; }

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .hero { padding: 48px 0 28px; }
  .hero-title { font-size: 30px; }
  .hero-sub { font-size: 14px; padding: 0 10px; }
  .page-head h1 { font-size: 23px; }
  .grid-2 { grid-template-columns: 1fr; }
  .nav { gap: 16px; }
  .card { padding: 18px; }
  .tool-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
  .footer-grid { flex-direction: column; }
}