/* ============================================================
 * 文枢 · 学术润色平台 — 用户端主题（参考写作狗布局风格）
 * 蓝紫主色 / 纯白底 / 浅底图标容器 / 圆角面板 / SVG 线性图标
 * ============================================================ */
:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --card: #ffffff;
  --border: #e8eaf2;
  --border-strong: #d8dbe8;
  --text: #23252b;
  --text-2: #7a7f8c;
  --primary: #4c5df0;
  --primary-dark: #3d4bd8;
  --primary-weak: #eef0fe;
  --accent: #ff7a45;
  --danger: #e5484d;
  --radius: 12px;
  --radius-sm: 8px;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.hidden { display: none !important; }
button { font-family: var(--sans); }

/* ===== 顶栏 ===== */
.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.topbar-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; gap: 26px;
  padding: 10px 24px;
}
.brand { display: flex; align-items: center; gap: 9px; }
.brand-mark { width: 36px; height: 36px; display: block; border-radius: 9px; }
.brand-name { font-size: 21px; font-weight: 800; color: var(--primary); letter-spacing: 1px; }
.nav { display: flex; gap: 6px; flex: 1; justify-content: center; flex-wrap: wrap; }
.nav-item {
  text-decoration: none; color: var(--text);
  font-size: 14px; padding: 7px 14px; border-radius: 8px;
}
.nav-item.active { color: var(--primary); font-weight: 600; background: var(--primary-weak); }
.nav-item:hover { color: var(--primary); }
.top-actions { display: flex; align-items: center; gap: 12px; }
.btn-accent {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--primary); color: #fff;
  border: none; border-radius: 9px;
  padding: 8px 15px; font-size: 13px; cursor: pointer;
}
.btn-accent svg { width: 15px; height: 15px; }
.btn-accent:hover { background: var(--primary-dark); }
.user-area { display: flex; align-items: center; gap: 10px; position: relative; }
.avatar { width: 34px; height: 34px; border-radius: 50%; }
.user-name { font-weight: 600; font-size: 13px; }
.user-tag { font-size: 11px; color: var(--text-2); }

/* ===== 左侧悬浮记录条 ===== */
.float-record {
  position: fixed; left: 14px; top: 96px; z-index: 90;
  width: 46px; padding: 12px 0 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex; flex-direction: column; align-items: center; gap: 7px;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(76, 93, 240, .08);
  color: var(--text-2);
  transition: all .15s;
}
.float-record:hover { color: var(--primary); border-color: var(--primary); }
.float-record svg { width: 17px; height: 17px; }
.float-record span { writing-mode: vertical-lr; letter-spacing: 3px; font-size: 12px; line-height: 1; }

/* ===== 页面 ===== */
.page { max-width: 1280px; margin: 0 auto; padding: 20px 24px 52px; }

/* ===== 模式卡片 ===== */
.mode-cards {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  margin-bottom: 16px;
}
.mode-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 17px 17px 14px;
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
  position: relative;
}
.mode-card:hover { border-color: var(--border-strong); box-shadow: 0 3px 12px rgba(35, 37, 43, .05); }
.mode-card.selected { border-color: var(--primary); }
.mode-head { display: flex; align-items: center; gap: 10px; margin-bottom: 9px; }
.mode-icon-wrap {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--primary-weak); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.mode-icon { width: 18px; height: 18px; }
.mode-title { font-size: 15.5px; font-weight: 700; color: var(--text); }
.mode-desc { font-size: 12.5px; color: var(--text-2); line-height: 1.65; min-height: 42px; }
.mode-meta { margin-top: 9px; font-size: 12.5px; font-weight: 600; color: var(--primary); }
.mode-check {
  display: none; /* 仅选中卡片显示 */
  position: absolute; top: -7px; right: -7px;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--primary);
  align-items: center; justify-content: center;
  box-shadow: 0 2px 6px rgba(76, 93, 240, .35);
  z-index: 2;
}
.mode-card.selected .mode-check { display: flex; }
.mode-check svg { width: 12px; height: 12px; }

/* ===== 选项区 ===== */
.options-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 20px 10px;
  margin-bottom: 14px;
}
.option-row { display: flex; align-items: center; gap: 16px; padding: 8px 0; }
.option-label {
  width: 92px; flex-shrink: 0;
  display: flex; align-items: center; gap: 7px;
  font-size: 13.5px; color: var(--text); font-weight: 500;
}
.option-label svg { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; }
.pill-group { display: flex; flex-wrap: wrap; gap: 9px; }
.pill {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 9px;
  padding: 6px 17px;
  font-size: 13.5px; color: var(--text);
  cursor: pointer; transition: all .12s;
}
.pill:hover { border-color: var(--primary); color: var(--primary); }
.pill.selected { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 500; }
.model-select {
  flex: 0 1 540px;
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 8px 12px;
  font-size: 13.5px; color: var(--text);
  background: var(--panel);
  outline: none;
}
.model-select:focus { border-color: var(--primary); }
.collapse-btn {
  margin-left: auto;
  border: none; background: none; cursor: pointer;
  font-size: 13px; color: var(--text-2);
}
.collapse-btn:hover { color: var(--primary); }
.caret-up { font-size: 11px; }
.whitelist-input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 8px 13px;
  font-size: 13.5px;
  outline: none;
  background: var(--panel);
}
.whitelist-input:focus { border-color: var(--primary); }

/* ===== 输入模式切换 ===== */
.input-switch {
  display: flex; gap: 12px; align-items: center;
  margin-bottom: 12px;
}
.input-tab {
  display: inline-flex; align-items: center; gap: 7px;
  border: 1px solid var(--border);
  background: var(--panel); color: var(--text-2);
  border-radius: 9px; cursor: pointer;
  font-size: 13.5px; padding: 8px 17px;
  position: relative;
  transition: all .12s;
}
.input-tab svg { width: 15px; height: 15px; }
.input-tab.selected { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 500; }
.input-tab:not(.selected):hover { border-color: var(--primary); color: var(--primary); }
.pro-badge {
  font-size: 10px; font-weight: 600;
  background: #ff5c8a; color: #fff;
  border-radius: 20px; padding: 1px 7px;
  margin-left: 2px;
}

/* ===== 工作区 ===== */
.ws-title-row {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 12px;
}
.ws-title { font-size: 17px; font-weight: 800; color: var(--text); }
.ws-meta { font-size: 12.5px; color: var(--text-2); }
.ws-actions { margin-left: auto; display: flex; gap: 10px; }
.ws-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  align-items: stretch;
}
.input-panel, .result-panel {
  background: #fafbfd;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex; flex-direction: column;
  min-height: 480px;
  overflow: hidden;
}
.ai-rate-bar {
  margin: 12px 14px 0;
  padding: 10px 14px;
  background: var(--primary-weak);
  border: 1px solid #dfe3fd;
  border-radius: 9px;
  font-size: 13px; color: var(--text);
  line-height: 1.7;
}
.input-area {
  flex: 1; resize: none;
  border: none; outline: none;
  padding: 16px 18px;
  font-size: 14px; line-height: 1.8;
  font-family: var(--sans);
  color: var(--text);
  background: transparent;
}
.input-area::placeholder { color: #b6bac6; }
.input-footer {
  display: flex; align-items: center; justify-content: flex-end;
  padding: 10px 14px;
}
.char-count { font-size: 12px; color: #b6bac6; }

/* ===== 按钮 ===== */
.btn {
  border: 1px solid transparent;
  border-radius: 9px;
  cursor: pointer;
  font-size: 13.5px;
  padding: 9px 20px;
  transition: all .12s;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  white-space: nowrap;
}
/* svg 不约束尺寸时默认 300x150，会把按钮撑爆（充值/微信登录按钮曾因此变形） */
.btn svg { width: 15px; height: 15px; flex-shrink: 0; }
.btn-primary { background: var(--primary); color: #fff; font-weight: 500; padding: 9px 26px; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-plain { background: var(--panel); border-color: var(--border); color: var(--text-2); }
.btn-plain:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-toggle { background: var(--panel); border-color: var(--border); color: var(--text-2); padding: 6px 13px; font-size: 12.5px; }
.btn-toggle:hover { border-color: var(--primary); color: var(--primary); }
.btn-login { padding: 7px 16px; background: var(--primary); color: #fff; }
.btn-logout { padding: 5px 11px; font-size: 12px; color: var(--text-2); background: none; border: 1px solid var(--border); }
.user-area { display: flex; align-items: center; gap: 10px; position: relative; }

/* ===== 结果面板 ===== */
.result-head {
  display: flex; align-items: center; gap: 10px;
  border-bottom: 1px solid var(--border);
  padding: 11px 16px;
  background: var(--panel);
}
.result-title { font-size: 14px; font-weight: 700; color: var(--text); margin-right: auto; }
.result-body { flex: 1; overflow-y: auto; padding: 16px 18px; }
.empty-state {
  height: 100%; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 10px;
  color: #b6bac6; text-align: center; padding: 30px;
}
.empty-icon { width: 42px; height: 42px; opacity: .5; }
.empty-title { font-size: 14px; }
.empty-tip { font-size: 12px; line-height: 1.7; max-width: 300px; }
.result-view .para {
  font-size: 14px; line-height: 1.9;
  padding: 4px 0 4px 12px;
  border-left: 2px solid var(--border);
  margin-bottom: 4px;
}
.result-view .para.processing { border-left-color: var(--primary); color: var(--text-2); }
.result-view .para.done { border-left-color: var(--primary); }
.progress-line {
  font-size: 12px; color: #b6bac6;
  padding: 8px 0 2px 14px;
  white-space: pre-wrap; word-break: break-all;
}

/* ===== 对比视图 ===== */
.diff-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border: 1px solid var(--border);
  border-radius: 9px; overflow: hidden;
  margin-bottom: 10px;
}
.diff-cell { padding: 10px 13px; font-size: 13px; line-height: 1.8; }
.diff-cell .tag {
  display: inline-block; font-size: 10.5px; color: var(--text-2);
  border: 1px solid var(--border);
  padding: 0 6px; border-radius: 4px; margin-right: 7px;
  vertical-align: 1px;
}
.diff-cell.orig { background: #fdf3f3; }
.diff-cell.new { background: #f3f6fd; }
.diff-cell.same { background: var(--panel); color: var(--text-2); }

/* ===== 弹层 ===== */
.modal-mask {
  position: fixed; inset: 0;
  background: rgba(35, 37, 43, .45);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
}
.modal {
  background: var(--panel);
  border-radius: 14px;
  width: min(640px, 92vw);
  max-height: 80vh;
  display: flex; flex-direction: column;
  box-shadow: 0 16px 48px rgba(35, 37, 43, .16);
  overflow: hidden;
}
.modal-sm { max-width: 390px; }
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-head span { font-size: 15.5px; font-weight: 700; }
.modal-close {
  border: none; background: none; cursor: pointer;
  font-size: 15px; color: var(--text-2); padding: 4px 8px;
}
.modal-close:hover { color: var(--danger); }
.modal-body { padding: 16px 20px 20px; overflow-y: auto; }

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12.5px; color: var(--text-2); margin-bottom: 6px; }
.field input {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 9px;
  font-size: 14px; outline: none;
  background: var(--panel);
}
.field input:focus { border-color: var(--primary); }
.auth-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.auth-tab {
  flex: 1; padding: 8px 0;
  border: 1px solid var(--border); background: var(--panel);
  border-radius: 9px; cursor: pointer; font-size: 13.5px; color: var(--text-2);
}
.auth-tab.selected { border-color: var(--primary); color: var(--primary); font-weight: 600; background: var(--primary-weak); }
.btn-block { width: 100%; padding: 11px 0; font-size: 14.5px; }
.auth-tip { margin-top: 10px; font-size: 12px; color: #b6bac6; text-align: center; min-height: 16px; }

/* ===== 微信扫码登录弹层 ===== */
.wx-login-modal { position: relative; width: 360px; max-width: 92vw; }
.wx-login-body { padding: 0 0 22px; text-align: center; }
.wx-login-head {
  background: linear-gradient(135deg, #4c5df0 0%, #6a7bff 100%);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 22px 20px 18px;
  color: #fff;
  margin: 0 0 18px;
}
.wx-login-modal .modal-close {
  position: absolute; top: 10px; right: 12px; z-index: 5;
  background: rgba(255,255,255,.22); color: #fff;
  width: 26px; height: 26px; border-radius: 50%;
  font-size: 13px; line-height: 1;
}
.wx-login-modal .modal-close:hover { background: rgba(255,255,255,.35); }
.wx-login-logo {
  width: 52px; height: 52px; margin: 0 auto 10px; border-radius: 14px;
  background: rgba(255,255,255,.18);
  display: flex; align-items: center; justify-content: center;
}
.wx-login-logo svg { width: 30px; height: 30px; }
.wx-login-title { font-size: 17px; font-weight: 700; letter-spacing: 1px; }
.wx-login-sub { margin-top: 5px; font-size: 12px; opacity: .85; }
.wx-qr-frame {
  position: relative; width: 210px; height: 210px; margin: 0 auto;
  border-radius: 14px; padding: 8px;
  border: 1.5px solid var(--border);
  background: #fff;
  box-shadow: 0 4px 18px rgba(35, 37, 43, .07);
}
.wx-qr-frame img { width: 100%; height: 100%; border-radius: 8px; display: block; }
.wx-qr-mask {
  position: absolute; inset: 0; z-index: 3; cursor: pointer;
  background: rgba(255,255,255,.94); border-radius: 14px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  color: var(--primary); font-size: 13px; font-weight: 600;
}
.wx-qr-mask svg { width: 26px; height: 26px; }
.wx-status { margin-top: 14px; font-size: 13.5px; color: var(--text-2); }
@keyframes wxPulse { 0%,100% { opacity: 1; } 50% { opacity: .45; } }
.wx-status { animation: wxPulse 1.8s ease-in-out infinite; }
.wx-status.wx-status-ok { animation: none; color: #18a058; font-weight: 600; }
.wx-login-tip { margin-top: 8px; font-size: 11.5px; color: #b6bac6; }

/* ===== 记录 / 排行 ===== */
.history-empty { text-align: center; color: #b6bac6; font-size: 13px; padding: 30px 0; }
.history-item {
  border: 1px solid var(--border); border-radius: 10px;
  padding: 11px 14px; margin-bottom: 9px;
  cursor: pointer; transition: border-color .12s;
  background: var(--panel);
}
.history-item:hover { border-color: var(--primary); }
.history-meta {
  display: flex; flex-wrap: wrap; gap: 12px;
  font-size: 11.5px; color: var(--text-2); margin-bottom: 6px;
}
.history-snippet { font-size: 12.5px; color: var(--text); line-height: 1.7; }
.rank-row { display: flex; align-items: center; gap: 12px; padding: 9px 0; border-bottom: 1px solid #f1f3f9; font-size: 13px; }
.rank-no {
  width: 24px; height: 24px; border-radius: 7px;
  background: var(--primary-weak);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: var(--primary); flex-shrink: 0;
}
.rank-row:nth-child(1) .rank-no { background: var(--primary); color: #fff; }
.rank-row:nth-child(2) .rank-no { background: #6b79f4; color: #fff; }
.rank-row:nth-child(3) .rank-no { background: #98a2f8; color: #fff; }
.rank-name { width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); font-size: 12.5px; }
.rank-bar { flex: 1; height: 8px; background: #f1f3f9; border-radius: 4px; overflow: hidden; }
.rank-bar i { display: block; height: 100%; background: var(--primary); border-radius: 4px; }
.rank-cnt { font-size: 12px; color: var(--text-2); width: 70px; text-align: right; flex-shrink: 0; }

/* ===== 提示条 ===== */
.toast {
  position: fixed; bottom: 34px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: #fff;
  padding: 11px 22px; border-radius: 10px;
  font-size: 13px; z-index: 300;
  box-shadow: 0 6px 20px rgba(0,0,0,.18);
}
.toast.error { background: var(--danger); }

/* ===== 页脚 ===== */
.site-footer {
  max-width: 1280px; margin: 0 auto;
  padding: 16px 24px 28px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 12px; color: #b6bac6;
}

/* ===== 响应式 ===== */
@media (max-width: 980px) {
  .mode-cards { grid-template-columns: repeat(2, 1fr); }
  .ws-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
  .float-record { display: none; }
}

/* ===== 文件上传视图 ===== */
.upload-view { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; padding: 14px; }
.upload-drop {
  width: 100%; border: 2px dashed var(--border-strong); border-radius: var(--radius);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; padding: 30px 20px; text-align: center;
  cursor: pointer; transition: border-color .15s, background .15s;
  background: var(--panel);
}
.upload-drop:hover, .upload-drop.dragging { border-color: var(--primary); background: var(--primary-weak); }
.upload-icon { width: 52px; height: 52px; color: var(--text-2); margin-bottom: 4px; }
.upload-drop.dragging .upload-icon, .upload-drop:hover .upload-icon { color: var(--primary); }
.upload-title, .upload-main { font-size: 15px; font-weight: 600; color: var(--text); }
.upload-sub { font-size: 12.5px; color: var(--text-2); line-height: 1.7; }
.upload-tip { font-size: 12.5px; color: var(--text-2); line-height: 1.7; }
.upload-btn { margin-top: 10px; padding: 9px 34px; background: var(--primary-weak); border-color: transparent; color: var(--primary); font-size: 14px; }
.upload-btn:hover { background: #e2e6fd; border-color: transparent; color: var(--primary-dark); }
.upload-status { margin-top: 8px; font-size: 12.5px; color: var(--primary); min-height: 18px; }
.upload-status.error { color: var(--danger); }

/* ===== 用户 chip + 下拉菜单 ===== */
.user-chip { display: flex; align-items: center; gap: 9px; cursor: pointer; padding: 4px 8px; border-radius: 9px; position: relative; }
.user-chip:hover { background: var(--primary-weak); }
.user-caret { width: 14px; height: 14px; color: var(--text-2); }
.user-menu {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: 150;
  min-width: 148px; background: var(--panel);
  border: 1px solid var(--border); border-radius: 12px;
  box-shadow: 0 10px 32px rgba(35,37,43,.13);
  padding: 6px; display: flex; flex-direction: column;
}
.user-menu-item {
  border: none; background: none; text-align: left;
  padding: 9px 13px; border-radius: 8px;
  font-size: 13.5px; color: var(--text); cursor: pointer;
}
.user-menu-item:hover { background: var(--primary-weak); color: var(--primary); }
.user-menu-item.danger { color: var(--danger); }
.user-menu-item.danger:hover { background: #fdeeee; color: var(--danger); }

/* ===== 个人中心 ===== */
.profile-avatar-row { display: flex; align-items: center; gap: 16px; margin-bottom: 18px; }
.profile-avatar { width: 68px; height: 68px; border-radius: 50%; border: 2px solid var(--border); object-fit: cover; }
.profile-avatar-meta { display: flex; flex-direction: column; gap: 7px; }
.profile-username { font-size: 13px; color: var(--text-2); }
.btn-sm2 { padding: 5px 13px; font-size: 12.5px; }
.profile-divider { height: 1px; background: var(--border); margin: 18px 0; }

/* ===== 自定义下拉 ===== */
.dropdown { position: relative; flex: 0 1 540px; }
.dropdown-toggle {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 10px;
  border: 1px solid var(--border); background: var(--panel);
  border-radius: 9px; padding: 8px 13px;
  font-size: 13.5px; color: var(--text); cursor: pointer;
  text-align: left;
}
.dropdown-toggle:hover { border-color: var(--primary); }
.dropdown-value { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dropdown-caret { width: 15px; height: 15px; color: var(--text-2); flex-shrink: 0; transition: transform .15s; }
.dropdown.open .dropdown-caret { transform: rotate(180deg); }
.dropdown-menu {
  position: absolute; top: calc(100% + 6px); left: 0; z-index: 140;
  width: min(560px, 78vw); max-height: 340px; overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--border); border-radius: 12px;
  box-shadow: 0 12px 36px rgba(35,37,43,.14);
  padding: 6px;
}
.dropdown-group-tip {
  font-size: 11.5px; color: #b6bac6; text-align: center;
  padding: 6px 10px 7px; border-bottom: 1px solid #f1f3f9; margin-bottom: 4px;
}
.dropdown-item {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 10px;
  border: none; background: none; text-align: left;
  padding: 9px 12px; border-radius: 8px;
  font-size: 13px; color: var(--text); cursor: pointer;
}
.dropdown-item:hover { background: var(--primary-weak); }
.dropdown-item.selected { background: var(--primary); color: #fff; font-weight: 500; }
.dropdown-item-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dropdown-check { width: 14px; height: 14px; flex-shrink: 0; visibility: hidden; }
.dropdown-item.selected .dropdown-check { visibility: visible; }


/* ===== 引擎自动匹配（只读展示） ===== */
.engine-static {
  flex: 0 1 540px; display: flex; align-items: center; gap: 9px;
  border: 1px solid var(--border); background: var(--primary-weak);
  border-radius: 9px; padding: 8px 13px;
  font-size: 13.5px; color: var(--text);
}
.engine-static svg { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; }
.engine-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.engine-badge {
  flex-shrink: 0; font-size: 11px; color: var(--primary);
  background: #fff; border: 1px solid var(--border);
  padding: 2px 8px; border-radius: 999px;
}

/* ===== 售后群二维码 ===== */
.qr-wrap { position: relative; }
.btn-support { border: 1px solid var(--border); background: var(--panel); white-space: nowrap; }
.btn-support svg { width: 15px; height: 15px; flex-shrink: 0; }
.btn-support:hover { border-color: var(--primary); color: var(--primary); }
.qr-pop {
  position: absolute; top: calc(100% + 10px); right: 0; z-index: 160;
  width: 208px; background: var(--panel);
  border: 1px solid var(--border); border-radius: 12px;
  box-shadow: 0 10px 32px rgba(35,37,43,.13);
  padding: 14px; text-align: center;
}
.qr-pop::before {
  content: ""; position: absolute; top: -6px; right: 26px;
  width: 10px; height: 10px; background: var(--panel);
  border-left: 1px solid var(--border); border-top: 1px solid var(--border);
  transform: rotate(45deg);
}
.qr-img { width: 176px; height: 176px; border-radius: 8px; object-fit: contain; }
.qr-empty { font-size: 12.5px; color: var(--text-2); padding: 60px 6px; }
.qr-tip { font-size: 12px; color: var(--text-2); margin-top: 8px; }

/* ===== 关于平台 ===== */
.about-hero { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.about-hero .brand-mark { width: 46px; height: 46px; border-radius: 10px; }
.about-title { font-size: 16px; font-weight: 700; color: var(--text); }
.about-sub { font-size: 12.5px; color: var(--text-2); margin-top: 3px; }
.about-block { margin-bottom: 14px; }
.about-h { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.about-block p { font-size: 13px; color: var(--text-2); line-height: 1.8; margin: 0; }
/* ===== 会员充值 ===== */
.rc-plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 14px; }
.rc-plan {
  position: relative; display: flex; flex-direction: column; align-items: center; gap: 4px;
  border: 1.5px solid var(--border); border-radius: 12px; background: var(--panel);
  padding: 16px 8px 13px; cursor: pointer; transition: border-color .12s, background .12s;
}
.rc-plan:hover { border-color: var(--primary); }
.rc-plan.selected { border-color: var(--primary); background: var(--primary-weak); }
.rc-plan-tag {
  position: absolute; top: -9px; right: 10px;
  background: var(--primary); color: #fff; font-size: 10.5px;
  padding: 1px 8px; border-radius: 999px;
}
.rc-plan-name { font-size: 13.5px; font-weight: 600; color: var(--text); }
.rc-plan-price { font-size: 19px; font-weight: 700; color: var(--primary); }
.rc-plan-orig { font-size: 11.5px; color: var(--text-2); text-decoration: line-through; }
.rc-loading { text-align: center; color: var(--text-2); font-size: 13px; padding: 30px 0; grid-column: 1 / -1; }
.rc-tip { font-size: 12px; color: var(--text-2); line-height: 1.7; margin-top: 10px; text-align: center; }
.rc-pay-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-size: 14px; font-weight: 600; color: var(--text); }
.rc-back { border: none; background: none; color: var(--text-2); font-size: 13px; cursor: pointer; padding: 4px 8px; }
.rc-back:hover { color: var(--primary); }
.rc-qr-box { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 10px 0 4px; }
.rc-qr-box img { width: 220px; height: 220px; border: 1px solid var(--border); border-radius: 12px; }
.rc-qr-tip { font-size: 12.5px; color: var(--text-2); }
.rc-amount { font-size: 22px; font-weight: 700; color: var(--primary); }
.rc-status { font-size: 13px; color: var(--primary); min-height: 20px; }

/* ===== 登录分割线 ===== */
.auth-divider { display: flex; align-items: center; gap: 12px; margin: 16px 0 12px; color: var(--text-2); font-size: 12px; }
.auth-divider::before, .auth-divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }