/* public/platform.css — 平台页共享样式(规格 021 → 034 → 035 SC Airy 明亮主题)。沿用 styles.css 变量。 */

.listing-mark {
  display: inline-block;
  margin-bottom: 6px;
  padding: 0.08rem 0.42rem;
  border-radius: 6px;
  border: 1px solid rgba(31, 138, 0, 0.35);
  background: var(--sc-green-50);
  color: var(--sc-green-ink);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.plat-container {
  width: 100%;
  max-width: 940px;
  margin: 40px auto;
  padding: 0 20px;
  min-height: 40vh;
}

.plat-container h1 {
  position: relative;
  margin: 0 0 10px;
  padding-left: 16px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

/* Brand index bar before page titles */
.plat-container h1::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 4px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--sc-blue), var(--sc-green));
}

.plat-lead {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
  margin: 0 0 26px;
  max-width: 62ch;
}

.plat-grid {
  display: grid;
  gap: 16px;
}

.plat-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.plat-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.plat-wallet-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.plat-wallet-actions .plat-btn.is-on {
  box-shadow: 0 0 0 3px rgba(4, 115, 234, 0.28), var(--cta-shadow);
}

.plat-wallet-actions .plat-btn-ghost.is-on {
  border-color: var(--sc-blue);
  color: var(--sc-navy);
  box-shadow: 0 0 0 3px rgba(4, 115, 234, 0.18);
}

.plat-wallet-panel {
  margin-top: 16px;
}

.plat-wallet-panel:not(:has(.plat-card:not([hidden]))) {
  display: none;
}

.plat-wallet-panel .plat-card {
  max-width: 440px;
}

.plat-wallet-panel .plat-field + .plat-field {
  margin-top: 14px;
}

.plat-wallet-panel .plat-btn {
  margin-top: 14px;
}

.plat-field-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.plat-choice {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.plat-choice-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  width: 100%;
  min-width: 0;
  padding: 12px 14px;
  border-radius: var(--btn-radius-lg);
  border: 1px solid var(--btn-2-border);
  background: var(--btn-2-bg);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  text-align: left;
  cursor: pointer;
  transition: border-color var(--btn-ease), background var(--btn-ease), box-shadow var(--btn-ease);
}

.plat-choice-btn:hover {
  border-color: var(--btn-2-border-hover);
}

/* 选中: 信息型底 + 底部蓝轨(与次按钮 hover / 标签页下划线同一语汇) */
.plat-choice-btn.is-on {
  border-color: var(--sc-blue);
  background: var(--btn-info-bg);
  box-shadow: inset 0 -2px 0 var(--sc-blue);
}

.plat-channel-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  border-radius: var(--btn-radius);
  background: var(--btn-2-bg);
  border: 1px solid var(--btn-2-border);
  color: var(--sc-navy);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--btn-2-shadow);
  transition: border-color var(--btn-ease), box-shadow var(--btn-ease), transform var(--btn-ease);
}

.plat-channel-btn:hover {
  border-color: var(--btn-2-border-hover);
  box-shadow: var(--btn-2-shadow-hover);
}

.plat-channel-btn:active {
  transform: var(--btn-press);
}

.plat-channel-btn img {
  width: 22px;
  height: 22px;
  flex: none;
}

.plat-choice-head {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.plat-choice-ico {
  width: 20px;
  height: 20px;
  flex: none;
  color: var(--text-secondary);
}

.plat-choice-btn.is-on .plat-choice-ico {
  color: var(--sc-navy);
}

.plat-choice-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.plat-choice-btn.is-on .plat-choice-sub {
  color: var(--sc-navy);
}

@media (max-width: 720px) {
  .plat-grid-2,
  .plat-grid-3 {
    grid-template-columns: 1fr;
  }

  .plat-container .plat-grid[style*="grid-template-columns:1fr 1fr"] {
    grid-template-columns: 1fr !important;
  }
}

.plat-card {
  position: relative;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: var(--bg-elev);
  box-shadow: var(--shadow-glow);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.plat-card h2,
.plat-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.plat-stat-label {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.plat-stat-value {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--sc-navy);
}

.plat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: flex-end;
  margin-bottom: 12px;
}

.plat-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 140px;
  flex: 1;
}

.plat-field label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.plat-field input,
.plat-field select,
.plat-field textarea {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  flex: none;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border-strong);
  background: #fff;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.plat-field input::placeholder,
.plat-field textarea::placeholder {
  color: var(--text-placeholder);
}

.plat-field input:focus,
.plat-field select:focus,
.plat-field textarea:focus {
  outline: none;
  border-color: var(--sc-blue);
  box-shadow: var(--focus-ring);
}

.plat-field input:disabled,
.plat-field select:disabled,
.plat-field textarea:disabled {
  background: #f3f6fa;
  color: #9aa8bb;
}

.plat-check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  margin: 6px 0;
}

/* 全局 input { flex:1; min-width:200px } 会把复选框撑开、文字挤到右侧 */
.plat-check input {
  flex: 0 0 auto;
  width: 16px;
  min-width: 16px;
  height: 16px;
  margin-top: 2px;
  padding: 0;
  accent-color: var(--sc-blue);
}

.plat-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  border-radius: var(--btn-radius);
  border: none;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  background: var(--cta-bg);
  color: var(--cta-text);
  box-shadow: var(--cta-shadow);
  transition: transform var(--btn-ease), box-shadow var(--btn-ease), border-color var(--btn-ease), color var(--btn-ease), background var(--btn-ease);
}

.plat-btn:hover:not(:disabled) {
  transform: var(--btn-lift);
  background: var(--cta-bg-hover);
}

.plat-btn:active:not(:disabled) {
  transform: var(--btn-press);
  box-shadow: var(--cta-shadow-active);
}

.plat-btn:disabled {
  opacity: 0.55;
  cursor: wait;
}

.plat-btn-ghost {
  background: var(--btn-2-bg);
  color: var(--btn-2-text);
  border: 1px solid var(--btn-2-border);
  box-shadow: var(--btn-2-shadow);
  font-weight: 600;
}

.plat-btn-ghost:hover:not(:disabled) {
  background: var(--btn-2-bg);
  border-color: var(--btn-2-border-hover);
  color: var(--btn-2-text);
  box-shadow: var(--btn-2-shadow-hover);
  transform: none;
}

.plat-btn-danger {
  background: var(--btn-2-bg);
  color: var(--red-ink);
  border: 1px solid var(--red);
  box-shadow: none;
}

.plat-btn-danger:hover:not(:disabled) {
  background: var(--red-50);
  border-color: var(--red);
  color: var(--red-ink);
  box-shadow: inset 0 -2px 0 var(--red);
  transform: none;
}

.plat-btn-ghost:active:not(:disabled),
.plat-btn-danger:active:not(:disabled) {
  transform: var(--btn-press);
  box-shadow: none;
}

.plat-msg {
  font-size: 13px;
  margin: 8px 0 0;
  min-height: 1.2em;
  color: var(--sc-navy);
}

.plat-msg:not(:empty) {
  padding: 10px 12px 10px 14px;
  border-radius: 10px;
  background: var(--sc-blue-50);
  border-left: 3px solid var(--sc-blue);
}

.plat-msg.is-warn {
  background: var(--amber-50);
  border-left-color: #f59e0b;
  color: var(--amber-ink);
}

.plat-msg.is-error {
  background: var(--red-50);
  border-left-color: var(--red);
  color: var(--red-ink);
}

.plat-msg.is-ok {
  background: var(--sc-green-50);
  border-left-color: var(--sc-green);
  color: var(--sc-green-ink);
}

.plat-note {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 8px 0 0;
  line-height: 1.5;
}

.plat-hint {
  font-size: 13px;
  line-height: 1.55;
  margin: 10px 0 0;
  padding: 10px 12px 10px 14px;
  border-radius: 10px;
  color: var(--text-secondary);
  background: var(--bg-tint);
  border-left: 3px solid var(--sc-blue);
}

.plat-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.plat-table th,
.plat-table td {
  text-align: left;
  padding: 9px 8px;
  border-bottom: 1px solid var(--divider);
  vertical-align: top;
}

.plat-table td {
  font-variant-numeric: tabular-nums;
}

.plat-table tbody tr:hover td {
  background: #f9fbfd;
}

.plat-table th {
  background: var(--bg-tint);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.plat-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--divider);
}

.plat-tab {
  padding: 8px 14px;
  margin-bottom: -1px;
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.plat-tab:hover {
  color: var(--text-primary);
}

.plat-tab.is-active {
  color: var(--text-primary);
  border-bottom-color: var(--sc-green);
}

.plat-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plat-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
}

.plat-card.plat-item:hover,
.plat-list > .plat-card:hover {
  border-color: var(--sc-green);
  box-shadow: var(--shadow-neon);
}

.plat-item-num {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  background: var(--gold-ink-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 1px 0 rgba(120, 80, 0, 0.18));
}

.plat-item-meta {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 2px;
}

#gn-auction-detail .plat-card h2 {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: var(--gold-ink-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.plat-item-price {
  color: var(--sc-navy);
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.plat-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
}

.plat-status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.plat-status-pending {
  background: var(--amber-50);
  color: var(--amber-ink);
  border-color: rgba(180, 83, 9, 0.35);
}

.plat-status-escrow,
.plat-status-paid {
  background: var(--sc-blue-50);
  color: var(--sc-blue-ink);
  border-color: rgba(4, 115, 234, 0.35);
}

.plat-status-completed,
.plat-status-active {
  background: var(--sc-green-50);
  color: var(--sc-green-ink);
  border-color: rgba(31, 138, 0, 0.35);
}

.plat-status-seller_default,
.plat-status-buyer_default,
.plat-status-defaulted {
  background: var(--red-50);
  color: var(--red-ink);
  border-color: rgba(220, 38, 38, 0.3);
}

.plat-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.plat-banner {
  padding: 12px 14px;
  border-radius: 10px;
  border-left: 3px solid var(--sc-blue);
  background: var(--sc-blue-50);
  color: var(--sc-navy);
  font-size: 13px;
  margin-bottom: 16px;
}

.plat-banner.is-warn {
  background: var(--amber-50);
  border-left-color: #f59e0b;
  color: var(--amber-ink);
}

.plat-banner.is-error {
  background: var(--red-50);
  border-left-color: var(--red);
  color: var(--red-ink);
}

.plat-banner.is-ok {
  background: var(--sc-green-50);
  border-left-color: var(--sc-green);
  color: var(--sc-green-ink);
}

.plat-section {
  margin-top: 28px;
}

.plat-split {
  display: grid;
  grid-template-columns: minmax(200px, 280px) 1fr;
  gap: 16px;
  align-items: start;
}

@media (max-width: 720px) {
  .plat-split {
    grid-template-columns: 1fr;
  }

  /* 全局 input { min-width:200px } 会把一行里的价格/拍卖字段挤出屏幕 */
  .plat-row {
    flex-direction: column;
    align-items: stretch;
  }

  .plat-field {
    width: 100%;
    min-width: 0;
  }
}

button.plat-ticket-item {
  width: 100%;
  text-align: left;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

button.plat-ticket-item.is-active {
  border-color: var(--sc-blue);
  box-shadow: var(--focus-ring);
}

.plat-item-title {
  font-family: var(--font-display);
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--sc-navy);
}

.plat-list {
  margin-top: 12px;
}

.plat-bubble {
  border-radius: 12px;
  padding: 10px 12px;
  margin: 8px 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 14px;
  line-height: 1.5;
}

.plat-bubble-user {
  background: var(--sc-blue-50);
  border: 1px solid var(--sc-blue-100);
}

.plat-bubble-staff {
  background: #fff;
  border: 1px solid var(--glass-border);
}

.plat-bubble-who {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.plat-field textarea,
.plat-card textarea {
  resize: vertical;
  min-height: 96px;
  width: 100%;
  box-sizing: border-box;
}

.plat-card textarea {
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border-strong);
  background: #fff;
  color: var(--text-primary);
  padding: 10px 12px;
  font-family: inherit;
  font-size: 14px;
}

.plat-card textarea:focus {
  outline: none;
  border-color: var(--sc-blue);
  box-shadow: var(--focus-ring);
}

.plat-actions select,
.plat-actions input {
  flex: 0 0 auto;
  min-width: 0;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border-strong);
  background: #fff;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 13px;
}

.plat-actions select:focus,
.plat-actions input:focus {
  outline: none;
  border-color: var(--sc-blue);
  box-shadow: var(--focus-ring);
}

#gn-ledger {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ── Support 页版式(规格 024 → 035 重排): 直连条 → 工单台(左 收件箱 / 右 新建表单 ⇄ 会话) ── */
.plat-btn-compact {
  padding: 7px 14px;
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
}

.plat-support .plat-lead {
  margin-bottom: 18px;
}

/* 次级入口: 一行紧凑条, 不再占首屏 */
.plat-support-channels {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  margin: 0 0 20px;
  padding: 12px 14px 12px 18px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--bg-tint);
}

.plat-support-channels-copy {
  flex: 1 1 260px;
  min-width: 0;
}

.plat-support-channels h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.plat-support-channels .plat-note {
  margin: 2px 0 0;
}

.plat-support-channels-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.plat-support-channels .plat-channel-btn {
  gap: 8px;
  padding: 8px 14px;
  font-size: 13px;
}

.plat-support-channels .plat-channel-btn img {
  width: 18px;
  height: 18px;
}

/* 未登录/加载失败: 占住工单台位置的空态面板(文字由 support.js 写入, 图标走伪元素) */
.plat-support-gate {
  margin: 0;
}

.plat-support-gate:empty {
  display: none;
}

.plat-support-gate:not(:empty) {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 280px;
  padding: 32px 20px;
  border: 1px dashed var(--glass-border-strong);
  border-radius: var(--radius);
  background: var(--bg-elev);
  color: var(--text-secondary);
  font-size: 14px;
  text-align: center;
}

.plat-support-gate::before,
.plat-support-empty::before {
  content: '';
  flex: none;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--sc-blue-50) center / 24px no-repeat;
}

.plat-support-gate::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230473EA' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 12a8 8 0 0 1-11.6 7.1L4 20l1-4.6A8 8 0 1 1 21 12z'/%3E%3Cpath d='M8.5 12h.01M12 12h.01M15.5 12h.01'/%3E%3C/svg%3E");
}

.plat-support-empty::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230473EA' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 13h5l1.5 2.5h5L16 13h5'/%3E%3Cpath d='M5.5 5h13L21 13v6H3v-6z'/%3E%3C/svg%3E");
}

/* 工单台 */
.plat-support-desk {
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: 20px;
}

.plat-support-inbox {
  padding: 16px;
}

.plat-support-inbox-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--divider);
}

.plat-support-inbox-head h2 {
  margin: 0;
}

/* 列表内滚动; 4px 内边距给 2px outline + 2px offset 焦点环留位, 不被裁切 */
.plat-support-inbox .plat-list {
  gap: 8px;
  max-height: min(62vh, 560px);
  margin-top: 9px;
  padding: 4px;
  overflow-y: auto;
}

.plat-support-inbox button.plat-ticket-item {
  flex: none;
  padding: 10px 12px;
  border: 1px solid var(--divider);
  border-radius: var(--btn-radius-lg);
  background: #fff;
  box-shadow: none;
}

.plat-support-inbox .plat-list > .plat-card:hover {
  border-color: var(--btn-2-border-hover);
  box-shadow: var(--btn-2-shadow-hover);
}

.plat-support-inbox button.plat-ticket-item.is-active,
.plat-support-inbox button.plat-ticket-item.is-active:hover {
  border-color: var(--sc-blue);
  background: var(--btn-info-bg);
  box-shadow: inset 3px 0 0 var(--sc-blue);
}

.plat-support-inbox button.plat-ticket-item.is-active .plat-item-meta {
  color: var(--text-secondary);
}

.plat-support-inbox .plat-item-title {
  margin-bottom: 2px;
  font-size: 14px;
  overflow-wrap: anywhere;
}

.plat-support-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 22px 8px 10px;
  text-align: center;
}

.plat-support-empty-title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.plat-support-empty .plat-note {
  max-width: 30ch;
  margin: 0 0 8px;
}

.plat-support-pane {
  min-width: 0;
}

/* 表单 / 会话: 统一 14px 纵向节奏, 底部动作区分隔线 */
.plat-support-form,
.plat-support-thread {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.plat-support-form h2,
.plat-support-thread h2 {
  margin: 0;
}

.plat-support-form .plat-field,
.plat-support-thread .plat-field {
  flex: none;
  min-width: 0;
}

.plat-support-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.plat-support-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--divider);
}

.plat-support-form > .plat-msg,
.plat-support-thread > .plat-msg {
  margin: 0;
}

.plat-support-form > .plat-msg:empty,
.plat-support-thread > .plat-msg:empty,
.plat-support-messages:empty {
  display: none;
}

.plat-support-thread-head {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--divider);
  overflow-wrap: anywhere;
}

.plat-support-thread-head .plat-note {
  margin: 4px 0 0;
}

.plat-support-messages {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.plat-support-messages .plat-bubble {
  max-width: 88%;
  margin: 0;
}

.plat-support-messages .plat-bubble-user {
  align-self: flex-end;
}

.plat-support-messages .plat-bubble-staff {
  align-self: flex-start;
}

@media (max-width: 720px) {
  /* 手机降级: 收件箱在上、表单/会话在下(覆盖上方桌面双栏) */
  .plat-support-desk,
  .plat-support-pair {
    grid-template-columns: minmax(0, 1fr);
  }

  .plat-support-inbox .plat-list {
    max-height: 300px;
  }

  .plat-support-gate:not(:empty) {
    min-height: 200px;
  }
}

/* 手机: 动作按钮满宽(规格 035 §10.2), 直连按钮均分一行 */
@media (max-width: 520px) {
  .plat-support-foot .plat-btn,
  .plat-support-channels-links,
  .plat-support-channels .plat-channel-btn {
    flex: 1 1 auto;
  }

  .plat-support-channels .plat-channel-btn {
    justify-content: center;
  }
}