/* ==========================================================================
   声学计算工具箱 · Acoustic Toolbox
   设计系统：浅色为主、卡片化布局、模块化视图（.view + 顶部导航）
   ========================================================================== */

:root {
  --bg: #f4f6fb;
  --bg-grad: radial-gradient(1200px 500px at 50% -180px, #e6edff 0%, rgba(230, 237, 255, 0) 70%);
  --card: #ffffff;
  --card-soft: #f8fafc;
  --border: #e4e8f0;
  --border-strong: #d3dae6;
  --text: #16202f;
  --text-soft: #374151;
  --muted: #6b7280;
  --faint: #94a3b8;
  --primary: #2563eb;
  --primary-d: #1d4ed8;
  --primary-soft: #eff4ff;
  --accent: #f97316;
  --ok: #059669;
  --ok-soft: #ecfdf5;
  --warn: #d97706;
  --warn-soft: #fffbeb;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 4px 16px -8px rgba(16, 24, 40, 0.12);
  --shadow-lift: 0 2px 4px rgba(16, 24, 40, 0.05), 0 12px 28px -12px rgba(16, 24, 40, 0.18);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --bg-grad: radial-gradient(1200px 500px at 50% -180px, #16233c 0%, rgba(22, 35, 60, 0) 70%);
    --card: #151b24;
    --card-soft: #1a212b;
    --border: #263140;
    --border-strong: #334153;
    --text: #e6edf5;
    --text-soft: #cbd5e1;
    --muted: #94a3b8;
    --faint: #7c8899;
    --primary: #5b8cff;
    --primary-d: #7aa2ff;
    --primary-soft: #1b2740;
    --accent: #fb923c;
    --ok: #34d399;
    --ok-soft: #10281f;
    --warn: #fbbf24;
    --warn-soft: #2a2110;
    --danger: #f87171;
    --danger-soft: #2c1416;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 16px -8px rgba(0, 0, 0, 0.6);
    --shadow-lift: 0 2px 4px rgba(0, 0, 0, 0.45), 0 12px 28px -12px rgba(0, 0, 0, 0.7);
  }
  .band-cell input,
  #roomSelect,
  select.btn,
  .btn,
  .mode-btn { background-color: var(--card-soft); }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  background-image: var(--bg-grad);
  background-repeat: no-repeat;
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-d); }

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--primary-soft);
  color: var(--primary-d);
  padding: 1px 5px;
  border-radius: 5px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
  z-index: 100;
  background: var(--card);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lift);
}

/* ------------------------------- 顶部导航 ------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: saturate(180%) blur(12px);
  background: color-mix(in srgb, var(--card) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
}
.brand:hover { color: var(--text); }
.brand-logo {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  flex: none;
}
.brand-name {
  display: flex;
  flex-direction: column;
  font-size: 15px;
  line-height: 1.15;
  letter-spacing: 0.02em;
}
.brand-name small {
  font-size: 10.5px;
  font-weight: 500;
  color: var(--faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.mainnav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-left: auto;
}
.mainnav a,
.nav-soon {
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--muted);
  transition: background 0.15s, color 0.15s;
}
.mainnav a:hover { background: var(--card-soft); color: var(--text); }
.mainnav a.active {
  background: var(--primary-soft);
  color: var(--primary-d);
  font-weight: 600;
}
.nav-soon {
  color: var(--faint);
  border: 1px dashed var(--border-strong);
  cursor: default;
  font-size: 12.5px;
}

/* ------------------------------- 布局 ------------------------------- */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 20px 8px;
}
.view { display: none; }
.view.active {
  display: flex;
  flex-direction: column;
  gap: 18px;
  animation: fade-in 0.22s ease;
}
@keyframes fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card h2,
.card h3 {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 650;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.hint {
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
}
.inline-note {
  margin: 8px 0 12px;
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.6;
}
.step {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary-d);
  font-size: 12px;
  font-weight: 700;
  flex: none;
}

/* 视图页头 */
.page-head {
  padding: 4px 2px 0;
}
.page-head h2 {
  margin: 0 0 4px;
  font-size: 22px;
  letter-spacing: 0.01em;
  display: block;
}
.page-head p { margin: 0; font-size: 13.5px; }

/* ------------------------------- 首页 Hero ------------------------------- */
.hero {
  background: linear-gradient(160deg, color-mix(in srgb, var(--primary) 10%, var(--card)) 0%, var(--card) 62%);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 34px 28px;
  box-shadow: var(--shadow);
}
.eyebrow {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-d);
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 14px;
}
.hero-title {
  margin: 0 0 10px;
  font-size: 30px;
  line-height: 1.25;
  letter-spacing: 0.01em;
}
.hero-sub {
  margin: 0 0 20px;
  max-width: 640px;
  color: var(--muted);
  font-size: 14px;
}
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.badge-row { display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  font-size: 11.5px;
  color: var(--muted);
  background: var(--card-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 11px;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  padding: 4px 2px 0;
}
.section-head h2 { margin: 0; font-size: 17px; }

.module-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.group-label {
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.06em;
  color: var(--faint);
  text-transform: uppercase;
  padding-left: 2px;
}
.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 14px;
}
.module-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}
a.module-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
  border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
  color: var(--text);
}
.module-card.soon {
  opacity: 0.62;
  cursor: default;
}
.mc-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary-d);
  flex: none;
}
.module-card.soon .mc-icon { background: var(--card-soft); color: var(--faint); }
.mc-body { display: flex; flex-direction: column; gap: 6px; }
.mc-title {
  font-size: 15px;
  font-weight: 650;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.mc-tag {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--faint);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 1px 8px;
}
.mc-tag.live {
  color: var(--ok);
  background: var(--ok-soft);
  border-color: color-mix(in srgb, var(--ok) 35%, transparent);
}
.mc-desc { font-size: 12.5px; color: var(--muted); }

/* ------------------------------- 双栏布局 ------------------------------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  gap: 18px;
  align-items: start;
}
.split.even { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.split-col {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}
@media (max-width: 900px) {
  .split,
  .split.even { grid-template-columns: minmax(0, 1fr); }
}

/* ------------------------------- 按钮 ------------------------------- */
.btn-row {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.btn-row.plain { margin-top: 0; }
.btn-row.toolbar { margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--border); }
.btn {
  padding: 9px 18px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
}
.btn:hover { background: var(--card-soft); border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
}
.btn.primary:hover { background: var(--primary-d); border-color: var(--primary-d); }
.btn.ghost { color: var(--muted); }
.btn.small { padding: 6px 12px; font-size: 13px; }

.sample-wrap { display: inline-flex; }
select.btn {
  padding: 9px 32px 9px 12px;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

/* ------------------------------- 模式切换 ------------------------------- */
.mode-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.mode-label { font-size: 12.5px; color: var(--muted); margin-right: 2px; }
.mode-btn {
  padding: 6px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--card);
  color: var(--muted);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}
.mode-btn:hover { background: var(--card-soft); }
.mode-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
}
.mode-note {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--text-soft);
}
.mode-note:empty { display: none; }

/* ------------------------------- 频带输入 ------------------------------- */
.band-grid {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 10px;
}
@media (max-width: 760px) {
  .band-grid { grid-template-columns: repeat(auto-fit, minmax(88px, 1fr)); }
}
.band-grid.third {
  grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
  gap: 8px;
}
.band-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.band-cell label {
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}
.band-cell input {
  width: 100%;
  padding: 8px 6px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  text-align: center;
  background: var(--card);
  color: var(--text);
}
.band-cell input:focus,
.field input:focus,
.field select:focus,
.aux textarea:focus,
#roomSelect:focus,
.pattern-card input:focus-visible {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent);
}
.band-cell.low-band input {
  border-color: color-mix(in srgb, var(--primary) 45%, var(--border-strong));
  background: var(--primary-soft);
}
.mini { margin-top: 3px; font-size: 11.5px; color: var(--faint); }
.sub.ok { color: var(--ok); }

/* ------------------------------- 折叠区 ------------------------------- */
.aux {
  margin-top: 14px;
  border-top: 1px dashed var(--border);
  padding-top: 12px;
}
.aux summary {
  cursor: pointer;
  font-size: 13.5px;
  color: var(--primary);
  font-weight: 600;
}
.aux-hint { margin: 8px 0; font-size: 12.5px; color: var(--muted); }
.aux textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 13px;
  resize: vertical;
  color: var(--text);
  background: var(--card);
}
.aux-msg { align-self: center; font-size: 12.5px; color: var(--primary); }

/* ------------------------------- 结果卡片 ------------------------------- */
.results {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.result-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.rc-title {
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 8px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.big {
  font-size: 26px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.unit { font-size: 14px; color: var(--muted); font-weight: 500; margin-left: 3px; }
.sub { margin-top: 6px; font-size: 12.5px; color: var(--muted); }
.warn { color: var(--danger); font-weight: 600; }

.result-hero {
  background: linear-gradient(165deg, color-mix(in srgb, var(--primary) 8%, var(--card)) 0%, var(--card) 60%);
}
.hero-rate {
  font-size: 46px;
  font-weight: 750;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}
.hero-rate .unit { font-size: 20px; }

/* 派生量统计格 */
.stat-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 10px;
}
.stat {
  background: var(--card-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}
.stat .s-label { font-size: 11.5px; color: var(--muted); }
.stat .s-value {
  font-size: 16px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  margin-top: 2px;
}
.stat .s-value small { font-size: 11.5px; font-weight: 500; color: var(--muted); margin-left: 2px; }
.stat .s-sub { font-size: 11px; color: var(--faint); margin-top: 2px; }

/* 公式展示 */
.formula {
  margin-top: 14px;
  padding: 11px 13px;
  background: var(--card-soft);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text-soft);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.formula .fx { color: var(--primary-d); font-weight: 600; }

/* 键值结果 */
.kv-result {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}
.kv-result:empty { display: none; }
.kv {
  background: var(--card-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
}
.kv .k { font-size: 11.5px; color: var(--muted); }
.kv .v {
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.kv .v.ok { color: var(--ok); }
.kv .v.bad { color: var(--danger); }
.kv .v small { font-size: 11.5px; font-weight: 500; color: var(--muted); margin-left: 2px; }

/* 提示条 */
.callout-row { display: flex; flex-direction: column; gap: 8px; margin-top: 14px; }
.callout {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  font-size: 12.5px;
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  border: 1px solid var(--border);
  background: var(--card-soft);
  color: var(--text-soft);
}
.callout .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
  margin-top: 6px;
  flex: none;
}
.callout.warn {
  background: var(--warn-soft);
  border-color: color-mix(in srgb, var(--warn) 35%, transparent);
  color: color-mix(in srgb, var(--warn) 75%, var(--text));
}
.callout.warn .dot { background: var(--warn); }
.callout.error {
  background: var(--danger-soft);
  border-color: color-mix(in srgb, var(--danger) 35%, transparent);
  color: var(--danger);
}
.callout.error .dot { background: var(--danger); }
.callout.info .dot { background: var(--primary); }
.callout.ok { background: var(--ok-soft); border-color: color-mix(in srgb, var(--ok) 30%, transparent); color: var(--ok); }
.callout.ok .dot { background: var(--ok); }

/* ------------------------------- 表单字段 ------------------------------- */
.field-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}
.field-row.compact { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); margin-bottom: 4px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 12.5px; color: var(--muted); }
.field input,
.field select {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}
.field .unit-tag { font-size: 11.5px; color: var(--faint); }
.field-auto { justify-content: flex-end; }

/* 阵列形制卡片 */
.pattern-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}
.pattern-card {
  position: relative;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--card);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}
.pattern-card:hover { border-color: color-mix(in srgb, var(--primary) 45%, var(--border-strong)); }
.pattern-card.selected {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 6%, var(--card));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 14%, transparent);
}
.pattern-card input { position: absolute; opacity: 0; pointer-events: none; }
.pc-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 9px;
  background: var(--card-soft);
  color: var(--primary-d);
  flex: none;
}
.pattern-card.selected .pc-icon { background: var(--primary-soft); }
.pc-body { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.pc-title { font-size: 13.5px; font-weight: 650; }
.pc-en { font-size: 10.5px; color: var(--faint); letter-spacing: 0.04em; text-transform: uppercase; }
.pc-desc { font-size: 11.5px; color: var(--muted); }
.pc-cell {
  display: inline-block;
  margin-top: 3px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--primary-d);
  background: var(--primary-soft);
  border-radius: 5px;
  padding: 1px 6px;
  align-self: flex-start;
}

/* Canvas */
.canvas-wrap {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-soft);
  overflow: hidden;
}
#perfCanvas { display: block; width: 100%; }
#chart {
  width: 100%;
  max-width: 720px;
  height: auto;
  display: block;
}

/* ------------------------------- 目标值对照 ------------------------------- */
.target-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.target-row label { font-size: 13.5px; color: var(--muted); }
#roomSelect {
  padding: 8px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  min-width: 200px;
}
.target-result {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}
.target-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  background: var(--card-soft);
}
.target-item .t-label { font-size: 12.5px; color: var(--muted); margin-bottom: 6px; }
.target-item .t-value { font-size: 20px; font-weight: 700; color: var(--text); }
.target-item.pass .t-value { color: var(--ok); }
.target-item.fail .t-value { color: var(--danger); }
.target-item .t-sub { margin-top: 4px; font-size: 12px; color: var(--muted); }
.verdict {
  display: inline-block;
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 8px;
  grid-column: 1 / -1;
  justify-self: start;
}
.verdict.pass { background: var(--ok-soft); color: var(--ok); }
.verdict.fail { background: var(--danger-soft); color: var(--danger); }
.verdict.na { background: var(--card-soft); color: var(--muted); }
.target-note { font-size: 12px; color: var(--muted); grid-column: 1 / -1; }

.detail-table {
  margin-top: 10px;
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.detail-table th,
.detail-table td {
  padding: 3px 6px;
  border-bottom: 1px solid var(--border);
  text-align: right;
}
.detail-table th:first-child,
.detail-table td:first-child { text-align: left; }
.detail-table th { color: var(--muted); font-weight: 600; }
.detail-table td.over { color: var(--danger); font-weight: 600; }

/* ------------------------------- 说明与页脚 ------------------------------- */
.notes ul {
  margin: 0;
  padding-left: 20px;
  font-size: 13px;
  color: var(--text-soft);
}
.notes li { margin-bottom: 8px; }
.notes li:last-child { margin-bottom: 0; }

.site-footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 26px 20px 44px;
  color: var(--muted);
  font-size: 12px;
}
.site-footer p { margin: 0 0 6px; }
.site-footer .footer-note { color: var(--faint); }

@media (max-width: 640px) {
  .container { padding: 18px 14px 8px; }
  .topbar-inner { padding: 10px 14px; gap: 12px; }
  .brand-name { font-size: 14px; }
  .hero { padding: 26px 20px; }
  .hero-title { font-size: 24px; }
  .card { padding: 16px; }
  .hero-rate { font-size: 38px; }
}