/* 意见反馈箱 — 高级简洁风 */
.yc-feedback-fab,
.yc-feedback-panel,
.yc-feedback-mask {
  --fb-font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'PingFang SC',
    'Helvetica Neue', sans-serif;
  --fb-ink: #0f1419;
  --fb-ink-2: #3d4654;
  --fb-muted: #8b95a5;
  --fb-line: rgba(15, 20, 25, 0.08);
  --fb-accent: #1a56db;
  --fb-accent-soft: rgba(26, 86, 219, 0.1);
  --fb-gold: #b8860b;
  --fb-surface: rgba(255, 255, 255, 0.92);
  --fb-radius: 14px;
  --fb-radius-lg: 22px;
  --fb-shadow-sm: 0 1px 2px rgba(15, 20, 25, 0.04);
  --fb-shadow-md: 0 8px 30px rgba(15, 20, 25, 0.08), 0 2px 8px rgba(15, 20, 25, 0.04);
  --fb-shadow-lg: 0 24px 64px rgba(15, 20, 25, 0.14), 0 8px 24px rgba(15, 20, 25, 0.06);
  font-family: var(--fb-font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* —— 悬浮入口 —— */
.yc-feedback-fab {
  position: fixed;
  right: 16px;
  bottom: calc(156px + env(safe-area-inset-bottom, 0px));
  z-index: 899;
  width: 58px;
  height: 68px;
  border: none;
  background: transparent;
  cursor: pointer;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
.yc-feedback-fab.visible {
  display: flex;
}
.yc-feedback-fab-ring {
  display: none;
}
.yc-feedback-fab-core {
  position: relative;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(145deg, #ffffff 0%, #f4f6f9 100%);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--fb-shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.yc-feedback-fab-core::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 50%;
  padding: 1px;
  background: linear-gradient(135deg, rgba(26, 86, 219, 0.35), rgba(184, 134, 11, 0.2), transparent 60%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.85;
  pointer-events: none;
}
.yc-feedback-fab:hover .yc-feedback-fab-core,
.yc-feedback-fab:focus-visible .yc-feedback-fab-core {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 12px 36px rgba(26, 86, 219, 0.18), var(--fb-shadow-md),
    inset 0 1px 0 rgba(255, 255, 255, 1);
}
.yc-feedback-fab:active .yc-feedback-fab-core {
  transform: translateY(0) scale(0.97);
}
.yc-feedback-fab-icon {
  width: 22px;
  height: 22px;
  color: var(--fb-accent);
}
.yc-feedback-fab-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fb-ink-2);
  opacity: 0.75;
}

@media (min-width: 768px) {
  .yc-feedback-fab.visible {
    right: max(20px, calc(50% - 260px + 8px));
  }
  .yc-feedback-panel {
    left: 50%;
    right: auto;
    width: min(448px, calc(100% - 40px));
    max-height: min(84vh, 640px);
    bottom: auto;
    top: 50%;
    border-radius: var(--fb-radius-lg);
    transform: translate(-50%, -46%) scale(0.94);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.42s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.32s ease;
  }
  .yc-feedback-panel.open {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
    pointer-events: auto;
  }
  .yc-feedback-grabber {
    display: none;
  }
}
@media (min-width: 1200px) {
  .yc-feedback-fab.visible {
    right: max(20px, calc(50% - 280px + 8px));
  }
  .yc-feedback-panel {
    width: min(472px, calc(100% - 48px));
  }
}

/* —— 遮罩 —— */
.yc-feedback-mask {
  position: fixed;
  inset: 0;
  z-index: 948;
  background: rgba(12, 18, 28, 0.42);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.32s ease;
}
.yc-feedback-mask.open {
  opacity: 1;
  pointer-events: auto;
}

/* —— 面板 —— */
.yc-feedback-panel {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 949;
  max-height: min(92vh, 700px);
  display: flex;
  flex-direction: column;
  background: #eef1f6;
  border-radius: var(--fb-radius-lg) var(--fb-radius-lg) 0 0;
  box-shadow: var(--fb-shadow-lg);
  transform: translateY(100%);
  transition: transform 0.42s cubic-bezier(0.22, 1, 0.36, 1);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  overflow: hidden;
  isolation: isolate;
}
.yc-feedback-panel.open {
  transform: translateY(0);
}

.yc-feedback-panel-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(165deg, #f8fafc 0%, #eef1f6 42%, #e8ecf3 100%);
}
.yc-feedback-panel-bg::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 86, 219, 0.09) 0%, transparent 68%);
}
.yc-feedback-panel-bg::after {
  content: '';
  position: absolute;
  top: 40px;
  left: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184, 134, 11, 0.06) 0%, transparent 70%);
}

.yc-feedback-grabber,
.yc-feedback-head,
.yc-feedback-tabs,
.yc-feedback-body {
  position: relative;
  z-index: 1;
}

.yc-feedback-grabber {
  flex-shrink: 0;
  padding: 12px 0 4px;
  display: flex;
  justify-content: center;
}
.yc-feedback-grabber::after {
  content: '';
  width: 40px;
  height: 4px;
  border-radius: 99px;
  background: rgba(15, 20, 25, 0.12);
}

.yc-feedback-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 4px 24px 20px;
}
.yc-feedback-head-text {
  flex: 1;
  min-width: 0;
}
.yc-feedback-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fb-accent);
  opacity: 0.85;
  margin-bottom: 6px;
}
.yc-feedback-head h2 {
  margin: 0;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.035em;
  color: var(--fb-ink);
  line-height: 1.15;
}
.yc-feedback-head .sub {
  display: block;
  font-size: 14px;
  font-weight: 400;
  color: var(--fb-muted);
  margin-top: 8px;
  line-height: 1.5;
  max-width: 28em;
}

.yc-feedback-close {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  margin-top: 18px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  color: var(--fb-ink-2);
  font-size: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--fb-shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.8);
  transition: background 0.2s ease, transform 0.2s ease;
}
.yc-feedback-close:hover {
  background: #fff;
  transform: scale(1.05);
}
.yc-feedback-close svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
}

/* —— 分段控件 —— */
.yc-feedback-tabs {
  margin: 0 24px 20px;
  padding: 4px;
  display: flex;
  gap: 4px;
  background: rgba(15, 20, 25, 0.05);
  border-radius: 12px;
  border: 1px solid var(--fb-line);
}
.yc-feedback-tab {
  flex: 1;
  padding: 9px 14px;
  border: none;
  border-radius: 9px;
  background: transparent;
  color: var(--fb-muted);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}
.yc-feedback-tab.active {
  color: var(--fb-ink);
  background: var(--fb-surface);
  box-shadow: var(--fb-shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.yc-feedback-body {
  flex: 1;
  overflow: auto;
  padding: 0 24px 28px;
  -webkit-overflow-scrolling: touch;
}
.yc-feedback-pane {
  display: none;
}
.yc-feedback-pane.active {
  display: block;
  animation: yc-fb-fade-in 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes yc-fb-fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* —— 表单卡片 —— */
.yc-feedback-form-card {
  background: var(--fb-surface);
  border-radius: var(--fb-radius);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: var(--fb-shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.95);
  margin-bottom: 22px;
  backdrop-filter: blur(12px);
}
.yc-feedback-field {
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--fb-line);
}
.yc-feedback-field:last-child {
  border-bottom: none;
}
.yc-feedback-field label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fb-muted);
  padding: 14px 18px 5px;
  margin: 0;
}
.yc-feedback-field select,
.yc-feedback-field input,
.yc-feedback-field textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 2px 18px 16px;
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--fb-ink);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.02em;
  font-family: inherit;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  transition: background 0.2s ease;
}
.yc-feedback-field select:focus,
.yc-feedback-field input:focus,
.yc-feedback-field textarea:focus {
  background: var(--fb-accent-soft);
}
.yc-feedback-field select {
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 14 14'%3E%3Cpath fill='none' stroke='%238b95a5' stroke-width='1.5' stroke-linecap='round' d='M3.5 5.5L7 9l3.5-3.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 18px center;
  cursor: pointer;
}
.yc-feedback-field textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.55;
  padding-bottom: 4px;
}
.yc-feedback-char-count {
  margin: 0;
  padding: 0 18px 12px;
  font-size: 11px;
  color: var(--fb-muted);
  text-align: right;
}
.yc-feedback-field input::placeholder,
.yc-feedback-field textarea::placeholder {
  color: #b0b8c4;
  font-weight: 400;
}

.yc-feedback-submit {
  position: relative;
  width: 100%;
  padding: 0;
  border: none;
  border-radius: var(--fb-radius);
  background: linear-gradient(180deg, #2563eb 0%, #1a56db 48%, #1648c4 100%);
  color: #fff;
  font-size: 0;
  cursor: pointer;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(26, 86, 219, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.22);
  transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.25s ease;
}
.yc-feedback-submit::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255, 255, 255, 0.12) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}
.yc-feedback-submit:hover:not(:disabled)::before {
  transform: translateX(100%);
}
.yc-feedback-submit-text {
  display: block;
  padding: 16px 24px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.yc-feedback-submit:hover:not(:disabled) {
  box-shadow: 0 8px 24px rgba(26, 86, 219, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.28);
  transform: translateY(-1px);
}
.yc-feedback-submit:active:not(:disabled) {
  transform: translateY(0) scale(0.99);
}
.yc-feedback-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.yc-feedback-hint {
  font-size: 12px;
  color: var(--fb-muted);
  margin: 16px 8px 0;
  line-height: 1.6;
  text-align: center;
}
.yc-feedback-msg {
  font-size: 13px;
  margin-top: 14px;
  min-height: 18px;
  text-align: center;
  padding: 12px 16px;
  border-radius: 11px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.yc-feedback-msg.err {
  color: #b42318;
  background: rgba(220, 38, 38, 0.06);
  border: 1px solid rgba(220, 38, 38, 0.1);
}
.yc-feedback-msg.ok {
  color: #067647;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.12);
}

/* —— 我的反馈 —— */
.yc-feedback-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.yc-feedback-card {
  padding: 16px 18px;
  border-radius: var(--fb-radius);
  background: var(--fb-surface);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: var(--fb-shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  cursor: pointer;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.25s ease;
}
@media (hover: hover) {
  .yc-feedback-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--fb-shadow-md), inset 0 1px 0 rgba(255, 255, 255, 1);
  }
}
.yc-feedback-card:active {
  transform: scale(0.99);
}
.yc-feedback-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.yc-feedback-card-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--fb-ink);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.yc-feedback-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 9px;
  border-radius: 6px;
  flex-shrink: 0;
}
.yc-feedback-badge.pending {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.14), rgba(217, 119, 6, 0.08));
  color: #b45309;
}
.yc-feedback-badge.replied {
  background: var(--fb-accent-soft);
  color: var(--fb-accent);
}
.yc-feedback-badge.closed {
  background: rgba(15, 20, 25, 0.06);
  color: var(--fb-muted);
}
.yc-feedback-card-meta {
  font-size: 13px;
  color: var(--fb-muted);
  letter-spacing: -0.01em;
}

.yc-feedback-detail-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 16px;
  padding: 8px 0;
  border: none;
  background: none;
  color: var(--fb-accent);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.02em;
  cursor: pointer;
}
.yc-feedback-detail-block {
  position: relative;
  margin-bottom: 14px;
  padding: 18px 18px 18px 22px;
  border-radius: var(--fb-radius);
  background: var(--fb-surface);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: var(--fb-shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.9);
  overflow: hidden;
}
.yc-feedback-detail-block::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, #cbd5e1, #94a3b8);
}
.yc-feedback-detail-block h3 {
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fb-muted);
}
.yc-feedback-detail-block p {
  margin: 0;
  font-size: 15px;
  color: var(--fb-ink);
  line-height: 1.6;
  white-space: pre-wrap;
  letter-spacing: -0.01em;
}
.yc-feedback-detail-block p strong {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.03em;
  display: block;
  margin-bottom: 10px;
  color: var(--fb-ink);
}
.yc-feedback-detail-block.admin {
  background: linear-gradient(135deg, rgba(26, 86, 219, 0.04) 0%, rgba(255, 255, 255, 0.95) 100%);
  border-color: rgba(26, 86, 219, 0.12);
}
.yc-feedback-detail-block.admin::before {
  background: linear-gradient(180deg, #3b82f6, #1a56db);
}

.yc-feedback-empty {
  text-align: center;
  padding: 56px 28px;
  color: var(--fb-muted);
  font-size: 15px;
  line-height: 1.55;
  letter-spacing: -0.01em;
}
.yc-feedback-empty::before {
  content: '✦';
  display: block;
  font-size: 28px;
  margin-bottom: 14px;
  opacity: 0.35;
  color: var(--fb-accent);
}

@media (prefers-reduced-motion: reduce) {
  .yc-feedback-panel,
  .yc-feedback-mask,
  .yc-feedback-fab-core,
  .yc-feedback-pane.active,
  .yc-feedback-submit::before {
    transition: none;
    animation: none;
  }
}