/* ─────────────────────────────────────────────────────────
   AMZKit 利润 & 营收联动计算器 — 样式表
   与 Rating Calculator / 主页共用同一设计系统
───────────────────────────────────────────────────────── */

:root {
  --color-primary:     #165DFF;
  --color-primary-hover: #0E42D2;
  --color-primary-light: #EBF0FF;
  --color-star:         #F59E0B;
  --color-star-bg:     #FFF8E7;
  --color-success:      #16A34A;
  --color-success-bg:   #F0FDF4;
  --color-warning:      #D97706;
  --color-warning-bg:   #FFFBEB;
  --color-danger:       #DC2626;
  --color-danger-bg:    #FEF2F2;
  --color-bg:           #F4F6FA;
  --color-surface:      #FFFFFF;
  --color-surface-2:    #F8FAFC;
  --color-border:       #E2E8F0;
  --color-text:         #1A202C;
  --color-text-muted:   #64748B;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
}

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

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── 按钮（复用全局 styles.css 规范） ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease, box-shadow 150ms ease, transform 80ms ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn-ghost:hover { background: var(--color-primary-light); }
.btn-sm { font-size: 13px; padding: 8px 18px; }
.btn-warning {
  background: var(--color-warning);
  color: #fff;
  border-color: var(--color-warning);
}
.btn-warning:hover { background: #B45309; border-color: #B45309; }

/* ── 导航 ── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height, 64px);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  font-size: 16px;
  flex-shrink: 0;
  margin-right: 32px;
}

.logo-img {
  height: 64px;
  width: auto;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.nav-links a:not(.btn) {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: background 150ms, color 150ms;
}

.nav-links a:not(.btn):hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.nav-cta {
  margin-left: 8px;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
  margin-left: auto;
  border-radius: var(--radius-sm);
  transition: background 150ms;
}

.hamburger:hover {
  background: var(--color-surface-2);
}

.hamburger-line {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 150ms, opacity 150ms;
}

.hamburger-line:not(:last-child) {
  margin-bottom: 4px;
}

.hamburger.is-active .hamburger-line:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.hamburger.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* ── 页面头部 ── */
.page-header {
  padding-top: calc(var(--nav-height, 64px) + 48px);
  padding-bottom: 40px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.page-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
}

.breadcrumb-link {
  font-size: 13px;
  color: var(--color-text-muted);
  transition: color 150ms;
}

.breadcrumb-link:hover {
  color: var(--color-primary);
}

.breadcrumb-sep {
  font-size: 13px;
  color: var(--color-border);
}

.breadcrumb-current {
  font-size: 13px;
  color: var(--color-text-muted);
}

.page-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: clamp(24px, 3.5vw, 32px);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.6px;
  margin-bottom: 10px;
  line-height: 1.2;
}

.page-sub {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ── 计算器主体 ── */
.calc-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 60px;
}

/* ── 标签切换 ── */
.calc-tabs {
  display: flex;
  gap: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 6px;
  width: fit-content;
  margin: 0 auto 28px;
  box-shadow: var(--shadow-sm);
}
.calc-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background 150ms, color 150ms, box-shadow 150ms;
}
.calc-tab:hover { color: var(--color-primary); background: var(--color-primary-light); }
.calc-tab.active {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(22,93,255,0.3);
}
.tab-icon { font-size: 15px; }

/* ── 双栏布局 ── */
.calc-layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 24px;
  align-items: start;
}

/* ── 左侧输入面板 ── */
.calc-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 84px;
}

.calc-group {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.group-header { margin-bottom: 16px; }

/* ── 站点选择栏 ── */
.marketplace-bar {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}
.marketplace-select-wrap { flex: 1; margin-bottom: 0; }
.marketplace-select-wrap .select-wrap { max-width: 100%; }

.rate-badge {
  flex-shrink: 0;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  min-width: 150px;
}
.rate-badge-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.dev-hint {
  font-size: 10px;
  font-weight: 400;
  color: var(--color-primary);
  opacity: 0.6;
  margin-left: 2px;
}
.rate-badge-value {
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.rate-unit {
  font-size: 12px;
  color: var(--color-text-muted);
}
.rate-sym {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-left: 4px;
}
.rate-num {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}
.rate-badge-timestamp {
  font-size: 10px;
  color: var(--color-text-muted);
  margin-top: 2px;
  opacity: 0.7;
}
.help-tip {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-left: 4px;
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 14px;
  transition: color 0.2s;
}
.help-tip:hover { color: var(--color-primary); }
.help-tip-box {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 320px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 14px 16px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  z-index: 100;
  font-size: 12px;
  color: var(--color-text);
  line-height: 1.6;
  text-align: left;
}
.help-tip-box::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-bottom-color: #fff;
  z-index: 1;
}
.help-tip-box::after {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  border: 7px solid transparent;
  border-bottom-color: var(--color-border);
}
.help-tip:hover .help-tip-box { display: block; }
.help-tip-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 8px;
}
.help-tip-box p { margin: 0 0 6px; }
.help-tip-box ul {
  margin: 4px 0 6px;
  padding-left: 16px;
}
.help-tip-box li { margin-bottom: 3px; }
.help-tip-formula {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 6px;
  text-align: center;
  margin: 6px 0 10px !important;
}
.help-tip-note {
  font-size: 11px;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  padding-top: 6px;
  margin-top: 6px !important;
}
@media (max-width: 767px) {
  .marketplace-bar { flex-direction: column; align-items: stretch; }
  .rate-badge { min-width: unset; }
}

.cost-detail-item-total {
  grid-column: 1 / -1;
  border-top: 2px solid var(--color-border);
  border-bottom: none;
  padding-top: 8px;
  margin-top: 2px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 13px;
  gap: 12px;
}
.group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}
.group-title-icon { color: var(--color-primary); font-size: 16px; }
.group-desc { font-size: 12px; color: var(--color-text-muted); }

/* ── 表单字段 ── */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}
.field:last-child { margin-bottom: 0; }
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.field-half { margin-bottom: 0; }
.field-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
}
.field-label-icon { color: var(--color-text-muted); font-size: 12px; }
.field-hint { font-weight: 400; color: var(--color-text-muted); font-size: 11px; }
.field-input {
  padding: 9px 12px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color 150ms, box-shadow 150ms;
  width: 100%;
}
.field-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(22,93,255,0.1);
}
.field-input::placeholder { color: #B0B8C8; }
.field-input.compact { padding: 7px 10px; font-size: 13px; }

/* ── select ── */
.select-wrap { position: relative; }
.field-select { appearance: none; cursor: pointer; padding-right: 32px; }
.select-arrow {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: 12px;
  pointer-events: none;
}

/* ── 尺寸输入行 ── */
.dim-row {
  display: flex;
  align-items: center;
  gap: 4px;
}
.dim-input { flex: 1; min-width: 70px; text-align: center; }
.dim-sep { font-size: 13px; color: var(--color-text-muted); flex-shrink: 0; }
.field-hint-inline { font-size: 11px; color: var(--color-warning); margin-top: 2px; }

/* ── 折叠区 ── */
.calc-advanced {
  margin-top: 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.advanced-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--color-bg);
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: background 150ms;
}
.advanced-toggle:hover { background: #E8EDFB; color: var(--color-primary); }
.advanced-chevron { transition: transform 300ms ease; }
.advanced-toggle[aria-expanded="false"] .advanced-chevron { transform: rotate(180deg); }
.advanced-body {
  padding: 14px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}
.advanced-body .field:last-child { margin-bottom: 0; }

/* ── 滑块 ── */
.slider-field {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 14px;
}
.slider-field:last-child { margin-bottom: 0; }
.slider-field-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.slider-field-head .field-label { font-size: 13px; font-weight: 600; }
.slider-field-head .field-label-icon { display: none; }
.slider-value-display {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}
.slider-input {
  width: 100%;
  height: 6px;
  appearance: none;
  -webkit-appearance: none;
  background: var(--color-border);
  border-radius: 3px;
  cursor: pointer;
  margin-bottom: 6px;
  transition: background 150ms;
}
.slider-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 2px 6px rgba(22,93,255,0.35);
  cursor: grab;
  transition: transform 80ms;
}
.slider-input::-webkit-slider-thumb:active { transform: scale(1.15); cursor: grabbing; }
.slider-input::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  border: none;
  cursor: grab;
}
.slider-range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}
.slider-sync-input {
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  background: var(--color-surface);
}

/* ── 右侧结果列（浮动，始终可见） ── */
.calc-results-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 84px;
}
.result-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}
.result-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.result-panel-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}
.result-panel-title-row {
  display: flex;
  align-items: center;
  gap: 4px;
}
.result-panel-title i { color: var(--color-primary); }
.result-panel-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 4px 10px;
  border-radius: 20px;
}

/* ── ROI 徽章 ── */
.roi-badge {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
}
.roi-low { background: var(--color-danger-bg); color: var(--color-danger); }
.roi-good { background: var(--color-warning-bg); color: var(--color-warning); }
.roi-excellent { background: var(--color-success-bg); color: var(--color-success); }

/* ── 预警框 ── */
.calc-warning {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  background: var(--color-warning-bg);
  border: 1px solid #FDE68A;
  border-left: 4px solid var(--color-warning);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}
.warning-icon {
  color: var(--color-warning);
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}
.warning-content { flex: 1; }
.warning-heading { font-size: 13px; font-weight: 700; color: #92400E; margin-bottom: 4px; }
.warning-text { font-size: 12px; color: #78350F; line-height: 1.5; margin-bottom: 8px; }
.warning-opt-btn { font-size: 12px; padding: 5px 10px; }

/* ── 结果卡片网格 ── */
.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 18px;
}
.result-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  transition: box-shadow 150ms, border-color 150ms;
}
.result-card:hover { box-shadow: var(--shadow-md); }
.result-card-primary {
  background: linear-gradient(135deg, #EEF3FF 0%, #DDE6FF 100%);
  border-color: #C7D7FB;
}
.result-card-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
  background: var(--color-surface);
}
.result-card-primary .result-card-icon { background: rgba(22,93,255,0.1); color: var(--color-primary); }
.result-card-content { flex: 1; }
.result-card-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.result-card-value {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.result-card-primary .result-card-value { font-size: 24px; color: var(--color-primary); }
.result-card-sub { font-size: 11px; color: var(--color-text-muted); margin-top: 3px; }

/* ── 成本明细 ── */
.cost-breakdown {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 16px;
}
.cost-breakdown-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.cost-breakdown-title i { color: var(--color-primary); }

/* ── 营收成本明细 ── */
.cost-detail-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 12px;
}
.cost-detail-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 13px;
  padding: 5px 0;
  border-bottom: 1px dashed var(--color-border);
  gap: 12px;
}
.cost-detail-item-total {
  grid-column: 1 / -1;
  border-top: 2px solid var(--color-border);
  border-bottom: none;
  padding-top: 8px;
  margin-top: 2px;
}
.cost-detail-name {
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}
.cost-detail-value {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}
.cost-detail-item-total .cost-detail-name,
.cost-detail-item-total .cost-detail-value { color: var(--color-primary); font-size: 14px; }
.cost-detail-note {
  display: block;
  width: 100%;
  font-size: 10px;
  color: var(--color-text-muted);
  grid-column: 1 / -1;
  padding-left: 0;
  white-space: nowrap;
}

/* ── 运营资金 ── */
.working-capital {
  background: linear-gradient(135deg, #FFF8E6 0%, #FFF3CC 100%);
  border: 1px solid #F0D060;
  border-radius: var(--radius-md);
  padding: 12px 14px;
}
.working-capital-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  color: #8A6200;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.working-capital-label i { color: #C49A00; }
.working-capital-value {
  font-size: 22px;
  font-weight: 800;
  color: #5A4000;
  font-variant-numeric: tabular-nums;
  margin-bottom: 4px;
}
.working-capital-note {
  font-size: 11px;
  color: #8A6200;
  line-height: 1.4;
}
.cost-list { display: flex; flex-direction: column; gap: 6px; }
.cost-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  padding: 5px 0;
  border-bottom: 1px solid var(--color-border);
}
.cost-item:last-child { border-bottom: none; }
.cost-item-total { border-top: 2px solid var(--color-border); padding-top: 8px; margin-top: 2px; }
.cost-name { display: flex; align-items: center; gap: 6px; color: var(--color-text-muted); }
.cost-icon { color: var(--color-text-muted); font-size: 11px; }
.cost-val { font-weight: 700; font-variant-numeric: tabular-nums; color: var(--color-text); }
.cost-item-total .cost-val { color: var(--color-primary); font-size: 15px; }

/* ── 盈亏线 ── */
.breakeven-bar { margin-bottom: 8px; }
.breakeven-bar-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}
.breakeven-bar-label i { color: var(--color-primary); margin-right: 4px; }
.breakeven-track {
  position: relative;
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: visible;
}
.breakeven-marker {
  position: absolute;
  top: -4px;
  width: 3px;
  height: 16px;
  background: var(--color-primary);
  border-radius: 2px;
  transform: translateX(-50%);
}

/* ── 营收面板：周期切换 ── */
.period-tabs {
  display: flex;
  gap: 4px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 3px;
  width: fit-content;
  margin-bottom: 16px;
}
.period-tab {
  padding: 5px 16px;
  border: none;
  border-radius: calc(var(--radius-sm) - 2px);
  background: transparent;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background 150ms, color 150ms;
}
.period-tab.active { background: var(--color-surface); color: var(--color-primary); box-shadow: var(--shadow-sm); }

/* ── 情景模拟 ── */
.scenario-section { margin-bottom: 18px; }
.scenario-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.scenario-title i { color: var(--color-primary); }
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.scenario-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 8px;
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color 150ms, background 150ms, box-shadow 150ms;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
}
.scenario-card input[type="radio"] { display: none; }
.scenario-card i { font-size: 18px; color: var(--color-text-muted); transition: color 150ms; }
.scenario-card:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-light); }
.scenario-card:hover i { color: var(--color-primary); }
.scenario-card.active {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(22,93,255,0.1);
}
.scenario-card.active i { color: var(--color-primary); }

/* ── 分享栏 ── */
.share-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
  padding: 14px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.share-note { font-size: 12px; color: var(--color-text-muted); }
.share-toast {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-success);
  margin-left: auto;
}

/* ── 页脚 ── */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 40px 24px 0;
  margin-top: 40px;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 32px;
}
.footer-brand { display: flex; flex-direction: column; gap: 6px; }
.footer-logo { font-size: 28px; color: var(--color-primary); }
.footer-brand-name { font-size: 18px; font-weight: 800; color: var(--color-text); }
.footer-brand-desc { font-size: 13px; color: var(--color-text-muted); }
.footer-links { display: flex; gap: 40px; }
.footer-col h4 { font-size: 13px; font-weight: 700; color: var(--color-text); margin-bottom: 12px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-col a { font-size: 13px; color: var(--color-text-muted); text-decoration: none; transition: color 150ms; }
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 16px 0;
  text-align: center;
}
.footer-bottom p { font-size: 12px; color: var(--color-text-muted); }

/* ── 响应式 ── */
@media (max-width: 1024px) {
  .calc-layout { grid-template-columns: 1fr; }
  .calc-form { position: static; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
  .page-header { padding-top: calc(var(--nav-height, 64px) + 24px); padding-bottom: 24px; }
  .page-title { font-size: 22px; }
  .calc-main { padding: 0 16px 40px; }
  .calc-group { padding: 16px; }
  .field-row { grid-template-columns: 1fr; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .share-bar { flex-wrap: wrap; }
  .footer-inner { flex-direction: column; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-links.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height, 64px);
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--color-border);
    padding: 12px 16px;
    gap: 4px;
    transform: translateX(0);
  }
  .nav-links.is-open a {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
  }
}