/* 薄肌·黄毛 — 全站样式（深色 / 移动优先） */
:root {
  --bg: #0d0f14;
  --card: #161a22;
  --card2: #1c2230;
  --line: rgba(255, 255, 255, 0.07);
  --line2: rgba(255, 255, 255, 0.12);
  --text: #e8ecf3;
  --muted: #9aa3b2;
  --gold: #ffc93c;
  --gold-deep: #e6a800;
  --gold-soft: rgba(255, 201, 60, 0.12);
  --green: #5fd068;
  --red: #ff6b6b;
  --blue: #5b9dff;
  --purple: #b78cff;
  --radius: 14px;
}

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

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a { color: var(--gold); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }
.wrap-wide { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(13, 15, 20, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  color: var(--text); font-weight: 800; font-size: 17px; letter-spacing: 0.5px;
}
.logo:hover { text-decoration: none; }
.logo .dot { color: var(--gold); }
.logo svg { width: 22px; height: 22px; }
.nav-links { display: flex; gap: 4px; font-size: 14px; }
.nav-links a {
  color: var(--muted); padding: 6px 10px; border-radius: 8px;
}
.nav-links a:hover { color: var(--text); background: var(--card); text-decoration: none; }
@media (max-width: 560px) {
  .nav-links a.hide-sm { display: none; }
}

/* ---------- Hero / 面包 ---------- */
.hero { padding: 40px 0 8px; }
.hero h1 { font-size: 30px; line-height: 1.3; letter-spacing: 0.5px; }
.hero .sub { color: var(--muted); margin-top: 10px; font-size: 15px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.badge {
  font-size: 12px; color: var(--muted);
  border: 1px solid var(--line2); border-radius: 999px; padding: 3px 10px;
}
.badge.gold { color: var(--gold); border-color: rgba(255, 201, 60, 0.4); background: var(--gold-soft); }

.crumbs { font-size: 13px; color: var(--muted); padding: 18px 0 0; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--gold); }

/* ---------- GEO 快速答案 ---------- */
.geo-answer {
  margin: 20px 0 8px;
  background: linear-gradient(180deg, var(--gold-soft), rgba(255, 201, 60, 0.04));
  border: 1px solid rgba(255, 201, 60, 0.25);
  border-left: 3px solid var(--gold);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 15px;
}
.geo-answer .tag {
  display: inline-block; font-size: 12px; font-weight: 700; color: #1a1405;
  background: var(--gold); border-radius: 5px; padding: 1px 8px; margin-bottom: 8px;
}
.geo-answer b { color: var(--gold); }

/* ---------- 卡片 / 工具区 ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  margin: 16px 0;
}
.card h2 { font-size: 19px; margin-bottom: 4px; }
.card .desc { color: var(--muted); font-size: 14px; margin-bottom: 16px; }

.form-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px;
}
@media (max-width: 560px) { .form-grid { grid-template-columns: 1fr; } }
.field label {
  display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px;
}
.field input[type="number"], .field input[type="text"], .field input[type="date"], .field input[type="time"], .field select {
  width: 100%;
  background: var(--card2);
  border: 1px solid var(--line2);
  border-radius: 10px;
  color: var(--text);
  font-size: 16px;
  padding: 11px 12px;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}
.field select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' stroke='%239aa3b2' stroke-width='2' fill='none' stroke-linecap='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}
.field input:focus, .field select:focus { border-color: var(--gold); }
.field .hint { font-size: 12px; color: var(--muted); margin-top: 4px; }

.pill-group { display: flex; flex-wrap: wrap; gap: 8px; }
.pill-group input { display: none; }
.pill-group label {
  cursor: pointer; user-select: none;
  border: 1px solid var(--line2); border-radius: 999px;
  padding: 8px 16px; font-size: 14px; color: var(--muted);
  transition: all 0.15s;
}
.pill-group input:checked + label {
  background: var(--gold); border-color: var(--gold); color: #1a1405; font-weight: 700;
}

.btn {
  display: inline-block; cursor: pointer; border: none;
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  color: #1a1405; font-weight: 800; font-size: 16px;
  border-radius: 12px; padding: 13px 28px;
  margin-top: 16px; width: 100%;
  transition: transform 0.1s;
}
.btn:active { transform: scale(0.98); }
.btn.secondary {
  background: var(--card2); color: var(--text); border: 1px solid var(--line2);
}

/* ---------- 结果 ---------- */
.result { margin-top: 18px; display: none; }
.result.show { display: block; }
.result .big {
  font-size: 44px; font-weight: 800; color: var(--gold);
  line-height: 1.15; letter-spacing: -1px;
}
.result .big small { font-size: 18px; font-weight: 600; color: var(--muted); margin-left: 4px; }
.result .verdict { font-size: 17px; font-weight: 700; margin-top: 6px; }
.result .advice { color: var(--muted); font-size: 14px; margin-top: 8px; }

.stat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px; margin-top: 14px;
}
.stat {
  background: var(--card2); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px; text-align: center;
}
.stat .v { font-size: 20px; font-weight: 800; color: var(--text); }
.stat .v small { font-size: 12px; font-weight: 400; color: var(--muted); }
.stat .k { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* 分档条（体脂/BMI 所在区间） */
.gauge { margin-top: 14px; }
.gauge .bar {
  display: flex; height: 10px; border-radius: 999px; overflow: hidden;
  border: 1px solid var(--line);
}
.gauge .bar i { display: block; height: 100%; }
.gauge .marker {
  position: relative; height: 0;
}
.gauge .marker i {
  position: absolute; top: -16px; transform: translateX(-50%);
  width: 0; height: 0;
  border-left: 6px solid transparent; border-right: 6px solid transparent;
  border-top: 8px solid var(--gold);
}
.gauge .legend {
  display: flex; justify-content: space-between;
  font-size: 11px; color: var(--muted); margin-top: 6px;
}

/* 心率区间色条 */
.zone-row { display: flex; align-items: center; gap: 10px; margin-top: 10px; font-size: 14px; }
.zone-row .z {
  width: 74px; font-weight: 700; text-align: center;
  border-radius: 6px; padding: 4px 0; color: #10131a; font-size: 12px;
}
.zone-row .r { color: var(--muted); flex: 1; }
.zone-row .r b { color: var(--text); }

/* ---------- 公式说明 ---------- */
.gauge { position: relative; }
.card table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 14px; }
.card th, .card td { border: 1px solid var(--line2); padding: 8px 10px; text-align: left; }
.card th { background: var(--card2); color: var(--text); }
.formula-box {
  background: var(--card2); border: 1px dashed var(--line2);
  border-radius: 10px; padding: 14px 16px;
  font-size: 14px; color: var(--muted); margin-top: 12px;
}
.formula-box code {
  display: block; color: var(--gold); font-family: ui-monospace, Consolas, monospace;
  font-size: 13px; margin: 6px 0; overflow-x: auto; white-space: nowrap;
}
.formula-box p + p { margin-top: 8px; }

/* ---------- FAQ ---------- */
.faq details {
  border-bottom: 1px solid var(--line);
  padding: 4px 0;
}
.faq details:last-child { border-bottom: none; }
.faq summary {
  cursor: pointer; font-weight: 600; font-size: 15px;
  padding: 10px 0; list-style: none; position: relative; padding-right: 28px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 4px; top: 8px;
  color: var(--gold); font-size: 18px; font-weight: 400;
}
.faq details[open] summary::after { content: "−"; }
.faq .a { color: var(--muted); font-size: 14px; padding: 0 0 12px; }

/* ---------- 内链区 ---------- */
.next-links h2 { font-size: 18px; margin-bottom: 12px; }
.link-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px;
}
.link-card {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px; transition: border-color 0.15s;
}
.link-card:hover { border-color: rgba(255, 201, 60, 0.45); text-decoration: none; }
.link-card .t { color: var(--text); font-weight: 700; font-size: 14px; }
.link-card .t::before { content: "→ "; color: var(--gold); }
.link-card .d { color: var(--muted); font-size: 12px; margin-top: 4px; }

/* ---------- 首页工具网格 ---------- */
.tool-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px;
}
.tool-card {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; transition: border-color 0.15s, transform 0.1s;
}
.tool-card:hover { border-color: rgba(255, 201, 60, 0.5); text-decoration: none; transform: translateY(-2px); }
.tool-card .icon { font-size: 26px; }
.tool-card .t { color: var(--text); font-weight: 800; font-size: 16px; margin-top: 8px; }
.tool-card .d { color: var(--muted); font-size: 13px; margin-top: 4px; min-height: 38px; }
.tool-card .tags { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.tool-card .tags i {
  font-style: normal; font-size: 11px; color: var(--gold);
  background: var(--gold-soft); border-radius: 5px; padding: 2px 7px;
}

.section-title { font-size: 22px; margin: 36px 0 14px; }
.section-title .en { color: var(--muted); font-size: 13px; font-weight: 400; margin-left: 8px; }

/* ---------- 文章（热点页） ---------- */
.article { font-size: 16px; }
.article p { margin: 14px 0; color: #cfd6e1; }
.article h2 { font-size: 21px; margin: 30px 0 6px; padding-top: 18px; border-top: 1px solid var(--line); }
.article h3 { font-size: 17px; margin: 22px 0 4px; }
.article ul, .article ol { padding-left: 22px; margin: 12px 0; color: #cfd6e1; }
.article li { margin: 6px 0; }
.article strong { color: var(--text); }
.article table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; }
.article th, .article td { border: 1px solid var(--line2); padding: 9px 12px; text-align: left; }
.article th { background: var(--card2); color: var(--text); }
.article td { color: #cfd6e1; }
.article blockquote {
  border-left: 3px solid var(--gold); background: var(--gold-soft);
  padding: 10px 14px; border-radius: 0 10px 10px 0; margin: 14px 0; color: var(--muted); font-size: 14px;
}
.meta-line { color: var(--muted); font-size: 13px; margin-top: 8px; }

/* ---------- 测试页 ---------- */
.quiz-progress { display: flex; gap: 6px; margin: 18px 0 8px; }
.quiz-progress i { flex: 1; height: 5px; border-radius: 999px; background: var(--card2); }
.quiz-progress i.on { background: var(--gold); }
.quiz-q { font-size: 20px; font-weight: 700; margin: 18px 0 14px; }
.quiz-opts { display: grid; gap: 10px; }
.quiz-opt {
  text-align: left; cursor: pointer;
  background: var(--card2); border: 1px solid var(--line2);
  color: var(--text); font-size: 15px;
  border-radius: 12px; padding: 14px 16px;
  transition: border-color 0.15s;
}
.quiz-opt:hover { border-color: var(--gold); }

.dim-bar { margin: 10px 0; }
.dim-bar .dk { display: flex; justify-content: space-between; font-size: 13px; color: var(--muted); }
.dim-bar .track { height: 8px; border-radius: 999px; background: var(--card2); margin-top: 5px; overflow: hidden; }
.dim-bar .fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--gold-deep), var(--gold)); }

/* ---------- 广告位 ---------- */
.ad-slot {
  margin: 22px 0; min-height: 0;
}
.ad-slot:empty { display: none; }

/* ---------- footer ---------- */
.site-footer {
  margin-top: 56px; border-top: 1px solid var(--line);
  padding: 32px 0 44px; font-size: 13px; color: var(--muted);
}
.site-footer .cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 20px; }
.site-footer h4 { color: var(--text); font-size: 14px; margin-bottom: 10px; }
.site-footer li { list-style: none; margin: 5px 0; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--gold); }
.site-footer .legal { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 12px; line-height: 1.8; }

/* ---------- 工具页头部 ---------- */
.tool-head { padding-top: 26px; }
.tool-head h1 { font-size: 26px; line-height: 1.3; }
.tool-head .sub { color: var(--muted); margin-top: 8px; font-size: 15px; }

/* ---------- 杂项 ---------- */
.notice {
  background: rgba(91, 157, 255, 0.08); border: 1px solid rgba(91, 157, 255, 0.25);
  border-radius: 10px; padding: 12px 14px; font-size: 13px; color: var(--muted); margin: 14px 0;
}
.notice.warn { background: rgba(255, 107, 107, 0.07); border-color: rgba(255, 107, 107, 0.3); }
.mt8 { margin-top: 8px; } .mt16 { margin-top: 16px; } .mt24 { margin-top: 24px; }
.muted { color: var(--muted); }
.gold { color: var(--gold); }
.center { text-align: center; }
.share-tip { font-size: 13px; color: var(--muted); margin-top: 10px; text-align: center; }
.canvas-holder { display: flex; justify-content: center; margin-top: 16px; }
.canvas-holder canvas { max-width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--line2); }