/* ========================================
   薪连薪 Design System — Components
   ======================================== */

/* ── 全局盒模型基线 ── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* ── Buttons (品牌渐变统一体系) ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  font-family: var(--font-body);
  font-size: var(--text-btn);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  user-select: none;
  -webkit-user-select: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  transition: opacity 0.25s ease;
  opacity: 0;
}

.btn:focus-visible {
  outline: 2px solid var(--btn-gradient-focus-ring);
  outline-offset: 2px;
}

.btn:disabled,
.btn[disabled] {
  background: var(--btn-disabled-bg) !important;
  color: var(--btn-disabled-text) !important;
  border-color: var(--btn-disabled-border) !important;
  box-shadow: none !important;
  cursor: not-allowed;
  pointer-events: none;
  filter: none;
  transform: none;
}

.btn:active:not(:disabled) {
  transform: scale(0.97);
}

/* ═══ Primary — 品牌渐变主按钮 ═══ */
.btn--primary {
  background: var(--btn-gradient);
  color: var(--btn-primary-text);
  border-color: transparent;
  box-shadow: var(--btn-gradient-shadow);
}

.btn--primary::after {
  content: '';
  position: absolute;
  top: 0; left: 8px; right: 8px; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  pointer-events: none;
}

.btn--primary:hover {
  background: var(--btn-gradient-hover);
  color: #FFFFFF;
  border-color: transparent;
  box-shadow: var(--btn-gradient-shadow-hover);
  transform: translateY(-1px);
}

.btn--primary:active {
  background: var(--btn-gradient-active);
  color: #FFFFFF;
  border-color: transparent;
  box-shadow: var(--btn-gradient-shadow-active);
  transform: scale(0.97);
}

/* ═══ Secondary — 品牌描边渐变 ═══ */
.btn--secondary {
  background: var(--btn-secondary-gradient-bg);
  color: var(--btn-secondary-text);
  border-color: var(--btn-secondary-gradient-border);
}

.btn--secondary:hover {
  background: var(--btn-secondary-gradient-hover-bg);
  border-color: var(--btn-secondary-gradient-hover-border);
  color: var(--btn-secondary-gradient-hover-text);
  box-shadow: var(--btn-secondary-gradient-hover-shadow);
  transform: translateY(-1px);
}

.btn--secondary:active {
  background: rgba(36, 84, 255, 0.10);
  border-color: rgba(36, 84, 255, 0.35);
  transform: scale(0.97);
}

/* ═══ Outline — 品牌渐变描边 ═══ */
.btn--outline {
  background: transparent;
  color: #2454FF;
  border-color: rgba(36, 84, 255, 0.25);
}

.btn--outline:hover {
  background: var(--btn-gradient);
  color: #FFFFFF;
  border-color: transparent;
  box-shadow: var(--btn-gradient-shadow);
  transform: translateY(-1px);
}

.btn--outline:active {
  background: var(--btn-gradient-active);
  color: #FFFFFF;
  transform: scale(0.97);
}

/* ═══ Ghost — 轻量操作 ═══ */
.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn--ghost:hover {
  background: rgba(36, 84, 255, 0.06);
  color: #2454FF;
}

.btn--ghost:active {
  background: rgba(36, 84, 255, 0.10);
}

/* ═══ White — 深色背景上白底按钮 ═══ */
.btn--white {
  background: #FFFFFF;
  color: #2454FF;
  border-color: #FFFFFF;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.btn--white:hover {
  background: #F0F4FF;
  color: #0830D6;
  border-color: #F0F4FF;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.10);
  transform: translateY(-1px);
}

.btn--white:active {
  background: #E0E8FF;
  transform: scale(0.97);
}

/* ═══ Outline White — 深色背景上描边 ═══ */
.btn--outline-white {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.35);
}

.btn--outline-white:hover {
  background: rgba(255, 255, 255, 0.10);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.60);
  box-shadow: 0 0 20px rgba(0, 192, 250, 0.15);
  transform: translateY(-1px);
}

.btn--outline-white:active {
  background: rgba(255, 255, 255, 0.18);
  transform: scale(0.97);
}

/* ═══ Danger — 危险操作，融入品牌体系 ═══ */
.btn--danger {
  background: var(--btn-danger-bg);
  color: var(--btn-danger-text);
  border-color: transparent;
  box-shadow: var(--btn-danger-shadow);
}

.btn--danger:hover {
  background: var(--btn-danger-hover-bg);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(240, 68, 56, 0.30);
  transform: translateY(-1px);
}

.btn--danger:active {
  background: var(--btn-danger-active-bg);
  transform: scale(0.97);
}

.btn--danger:focus-visible {
  outline-color: var(--btn-danger-focus-ring);
}

/* ═══ Full Width ═══ */
.btn--full {
  width: 100%;
}

/* ═══ Loading ═══ */
.btn--loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #FFFFFF;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
}

.btn--secondary.btn--loading::after,
.btn--ghost.btn--loading::after {
  border-color: rgba(36, 84, 255, 0.15);
  border-top-color: #2454FF;
}

@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* Button Sizes */
.btn--sm {
  height: 36px;
  padding: 0 16px;
  font-size: var(--text-small);
}

.btn--lg {
  height: 52px;
  padding: 0 32px;
  font-size: var(--text-btn);
}

/* ═══ Tab / Pill / Chip — 品牌统一切换按钮 ═══ */
.tab-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 38px;
  padding: 0 18px;
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', var(--font-sans);
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border-radius: 9999px;
  border: 1px solid var(--tab-gradient-default-border);
  background: var(--tab-gradient-default-bg);
  color: var(--tab-gradient-default-text);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  user-select: none;
}

.tab-pill:hover {
  background: var(--tab-gradient-hover-bg);
  color: var(--tab-gradient-hover-text);
  border-color: rgba(36, 84, 255, 0.20);
}

.tab-pill--active {
  background: var(--tab-gradient-active-bg);
  color: var(--tab-gradient-active-text);
  border-color: transparent;
  box-shadow: var(--tab-gradient-active-shadow);
}

.tab-pill--active:hover {
  background: var(--btn-gradient-hover);
  color: #FFFFFF;
}

.tab-pill:focus-visible {
  outline: 2px solid var(--btn-gradient-focus-ring);
  outline-offset: 2px;
}

.tab-pill--sm {
  height: 32px;
  padding: 0 14px;
  font-size: 14px;
}

.tab-pill--lg {
  height: 44px;
  padding: 0 24px;
  font-size: var(--text-btn);
}

/* ── Cards ── */
.card {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card--flat {
  box-shadow: none;
}

.card--flat:hover {
  box-shadow: var(--shadow-sm);
  transform: none;
}

.card--no-padding {
  padding: 0;
}

.card--sm {
  padding: 24px;
}

.card--lg {
  padding: 48px;
}

.card--feature {
  border: none;
  box-shadow: none;
  background: var(--color-bg-secondary);
}

.card--feature:hover {
  background: var(--color-bg-tertiary);
  transform: none;
  box-shadow: none;
}

.card--product {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-default);
  overflow: hidden;
}

/* ── Stat Card ── */
.stat {
  text-align: left;
}

.stat__value {
  font-size: clamp(28px, 2vw, 40px);
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-heading);
}

.stat__label {
  font-size: var(--text-small);
  color: var(--color-text-tertiary);
  margin-top: 8px;
}

/* ── Badge / Pill ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 12px;
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
  white-space: nowrap;
}

.badge--success {
  background: var(--color-success-light);
  color: var(--color-success);
}

.badge--warning {
  background: var(--color-warning-light);
  color: var(--color-warning);
}

.badge--error {
  background: var(--color-error-light);
  color: var(--color-error);
}

/* ── Divider ── */
.divider {
  border: none;
  border-top: 1px solid var(--color-border-default);
  margin: 32px 0;
}

/* ── Input ── */
.input {
  height: 44px;
  padding: 0 16px;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
  width: 100%;
}

.input:hover {
  border-color: var(--color-border-hover);
}

.input:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.input::placeholder {
  color: var(--color-text-disabled);
}

/* ── Select ── */
select.input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238C95A3' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* ── Textarea ── */
textarea.input {
  height: auto;
  min-height: 100px;
  padding-top: 12px;
  padding-bottom: 12px;
  resize: vertical;
}

/* ── Checkbox / Radio ── */
.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

.form-checkbox__label {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Footer */
.footer {
  background: var(--color-bg-secondary);
  padding: clamp(40px, 4vw, 64px) 0 clamp(24px, 2vw, 40px);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--grid-gap);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer__brand img {
  height: 32px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  object-position: left center;
  display: block;
}

.footer__brand p {
  font-size: var(--text-small);
  color: var(--color-text-tertiary);
  line-height: 1.6;
  max-width: 280px;
}

.footer__col h5 {
  font-size: var(--text-small);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 16px;
  color: var(--color-text-primary);
}

.footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__col li {
  margin-bottom: 10px;
}

.footer__col a {
  font-size: var(--text-small);
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer__col a:hover {
  color: var(--color-text-primary);
}

.footer__bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border-default);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: var(--text-small);
  color: var(--color-text-tertiary);
}

/* ── Mobile Nav ── */
.mobile-nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .btn--lg {
    height: 48px;
    padding: 0 24px;
  }
}

@media (max-width: 768px) {
  .btn {
    height: 40px;
    padding: 0 16px;
  }

  .btn--lg {
    height: 48px;
    padding: 0 24px;
    font-size: var(--text-small);
  }

  .card {
    padding: 24px;
  }

  .card--lg {
    padding: 32px;
  }

  .mobile-nav-toggle {
    display: flex;
  }

  .footer__grid {
    grid-template-columns: 1fr;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* v3 组件规范 */

/* ── 卡片系统（禁止再自造新 Card 体系） ── */
.SurfaceCard { background: var(--card-surface-bg); border: 1px solid var(--card-surface-border); border-radius: var(--radius-card); padding: 24px; }
.ElevatedCard { background: var(--card-elevated-bg); border: 1px solid var(--card-surface-border); border-radius: var(--radius-card-lg); box-shadow: var(--card-elevated-shadow); padding: 28px; }
.InteractiveCard { background: var(--card-surface-bg); border: 1px solid var(--card-surface-border); border-radius: var(--radius-card); padding: 24px; transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease; }
.InteractiveCard:hover { border-color: var(--card-interactive-hover-border); box-shadow: var(--card-interactive-hover-shadow); }
a.InteractiveCard:hover { transform: translateY(-2px); }

/* ── Tabs Style A：Underline（桌面正式内容） ── */
.TabsUnderline { display: flex; gap: 4px; border-bottom: 1px solid var(--border-subtle, #E2E7F0); overflow-x: auto; }
.TabsUnderline__btn { appearance: none; background: transparent; border: 0; padding: 10px 18px; font-size: var(--text-btn); color: var(--color-text-secondary); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap; transition: color .15s ease, border-color .15s ease; }
.TabsUnderline__btn:hover { color: var(--color-text-primary); }
.TabsUnderline__btn[aria-selected="true"], .TabsUnderline__btn--active { color: var(--brand-primary, #2454FF); border-bottom-color: var(--brand-primary, #2454FF); font-weight: var(--font-weight-medium); }
.TabsUnderline__btn:focus-visible { outline: 2px solid var(--btn-primary-focus-ring, rgba(36,84,255,.28)); outline-offset: 2px; border-radius: 4px; }
@media (max-width: 1023px) { .TabsUnderline { scrollbar-width: none; } .TabsUnderline::-webkit-scrollbar { display: none; } }

/* ── Tabs Style B：Soft Segmented（数量 <6 的能力切换） ── */
.TabsSegmented { display: inline-flex; gap: 4px; background: var(--bg-soft-brand, #EEF3FF); border: 1px solid var(--border-subtle, #E2E7F0); border-radius: 12px; padding: 4px; max-width: 100%; overflow-x: auto; }
.TabsSegmented__btn { appearance: none; background: transparent; border: 0; padding: 8px 18px; border-radius: 8px; font-size: var(--text-btn); color: var(--color-text-secondary); cursor: pointer; white-space: nowrap; transition: background .15s ease, color .15s ease, box-shadow .15s ease; }
.TabsSegmented__btn:hover { color: var(--color-text-primary); }
.TabsSegmented__btn[aria-selected="true"], .TabsSegmented__btn--active { background: #FFFFFF; color: var(--brand-primary, #2454FF); font-weight: var(--font-weight-medium); box-shadow: 0 1px 4px rgba(24,32,51,.08); }
.TabsSegmented__btn:focus-visible { outline: 2px solid var(--btn-primary-focus-ring, rgba(36,84,255,.28)); outline-offset: 1px; }

/* ── MetricCluster：品牌数据卡（弱 surface，无强 shadow，图标 16–20px） ── */
.MetricCluster { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.MetricCard { display: flex; flex-direction: column; gap: 6px; background: var(--card-surface-bg); border: 1px solid var(--card-surface-border); border-radius: var(--radius-card); padding: 20px 22px; }
.MetricCard__icon { width: 34px; height: 34px; border-radius: 9px; display: flex; align-items: center; justify-content: center; background: var(--bg-soft-brand, #EEF3FF); color: var(--brand-primary, #2454FF); margin-bottom: 6px; }
.MetricCard__icon svg { width: 18px; height: 18px; }
.MetricCard__value { font-size: 34px; line-height: 1.1; font-weight: var(--font-weight-semibold); color: var(--color-text-primary); letter-spacing: -0.01em; }
.MetricCard__label { font-size: 14px; color: var(--color-text-secondary); }
.MetricCard__sub { font-size: 14px; color: var(--color-text-tertiary); }
@media (max-width: 1023px) { .MetricCluster { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 767px) { .MetricCluster { grid-template-columns: repeat(2, 1fr); gap: 12px; } .MetricCard__value { font-size: 28px; } }

/* ── 状态样式 ── */
.StateHint { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-radius: 10px; font-size: 15px; line-height: 1.6; }
.StateHint--empty { background: var(--bg-section, #F7F9FD); color: var(--color-text-secondary); border: 1px dashed var(--border-subtle, #E2E7F0); }
.StateHint--loading { background: var(--bg-section, #F7F9FD); color: var(--color-text-secondary); }
.StateHint__spinner { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--border-subtle, #E2E7F0); border-top-color: var(--brand-primary, #2454FF); animation: spinc 0.8s linear infinite; }
@keyframes spinc { to { transform: rotate(360deg); } }