/* ===== 全局 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f1f5f9;
  --panel: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-sub: #64748b;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
}
body { font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }
a { color: var(--primary); text-decoration: none; }
h2 { font-size: 20px; margin-bottom: 16px; }
h3 { font-size: 15px; margin-bottom: 12px; color: var(--text); }

/* ===== 登录页 ===== */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 60%, #3b82f6 100%); }
.login-card { background: #fff; border-radius: 16px; padding: 40px 36px; width: 380px; box-shadow: 0 20px 60px rgba(0,0,0,.25); text-align: center; }
.login-logo { font-size: 44px; margin-bottom: 8px; }
.login-card h1 { font-size: 22px; margin-bottom: 4px; }
.login-sub { color: var(--text-sub); margin-bottom: 24px; font-size: 13px; }
.login-card label { display: block; text-align: left; margin: 12px 0 4px; font-size: 13px; color: var(--text-sub); }
.login-card input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }
.login-card input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.12); }
.login-tip { margin-top: 16px; font-size: 12px; color: var(--text-sub); }
.error-text { color: var(--danger); font-size: 13px; margin-top: 8px; min-height: 18px; text-align: left; }
.success-text { color: var(--success); font-size: 13px; margin-left: 12px; }

/* ===== 布局 ===== */
.layout { display: flex; min-height: 100vh; }
.sidebar { width: 210px; background: #0f172a; color: #cbd5e1; display: flex; flex-direction: column; position: fixed; top: 0; bottom: 0; }
.sidebar-logo { padding: 20px 18px; font-size: 16px; font-weight: 700; color: #fff; border-bottom: 1px solid rgba(255,255,255,.08); }
.sidebar nav { flex: 1; padding: 12px 8px; }
.nav-item { display: block; padding: 11px 14px; border-radius: 8px; margin-bottom: 4px; color: #cbd5e1; font-size: 14px; transition: background .15s; }
.nav-item:hover { background: rgba(255,255,255,.08); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; }
.sidebar-footer { padding: 14px; border-top: 1px solid rgba(255,255,255,.08); }
.user-info { display: flex; justify-content: space-between; align-items: center; font-size: 13px; }
.logout { color: #94a3b8; }
.logout:hover { color: #f87171; }
.main { flex: 1; margin-left: 210px; padding: 24px 28px; max-width: 1200px; }
.page { display: none; }
.page.active { display: block; }

/* ===== 组件 ===== */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 20px; }
.stat-card { background: var(--panel); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.stat-num { font-size: 30px; font-weight: 700; color: var(--primary); }
.stat-label { color: var(--text-sub); margin-top: 4px; font-size: 13px; }
.panel { background: var(--panel); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); margin-bottom: 20px; }
.guide-list { padding-left: 20px; line-height: 2; }
.tip-text { color: var(--text-sub); line-height: 1.8; margin-top: 8px; }
.toolbar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }
.toolbar input, .toolbar select { padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; background: #fff; }
.toolbar input[type=text] { width: 280px; }

.btn { padding: 9px 16px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text); font-size: 14px; cursor: pointer; transition: all .15s; }
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-danger { color: var(--danger); border-color: #fecaca; }
.btn-danger:hover { background: #fef2f2; border-color: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: 12px; border-radius: 6px; }
.btn-block { width: 100%; margin-top: 16px; }

.table { width: 100%; border-collapse: collapse; background: var(--panel); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.table th, .table td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
.table th { background: #f8fafc; color: var(--text-sub); font-weight: 600; font-size: 13px; }
.table tr:last-child td { border-bottom: none; }
.table td { max-width: 320px; word-break: break-word; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; }
.badge-green { background: #dcfce7; color: var(--success); }
.badge-red { background: #fee2e2; color: var(--danger); }
.badge-blue { background: #dbeafe; color: var(--primary); }
.badge-gray { background: #f1f5f9; color: var(--text-sub); }
.badge-yellow { background: #fef3c7; color: var(--warning); }

/* ===== 会话 ===== */
.conv-layout { display: flex; gap: 16px; height: calc(100vh - 190px); }
.conv-list { width: 320px; background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); overflow-y: auto; flex-shrink: 0; }
.conv-item { padding: 12px 14px; border-bottom: 1px solid var(--border); cursor: pointer; }
.conv-item:hover { background: #f8fafc; }
.conv-item.active { background: #eff6ff; border-left: 3px solid var(--primary); }
.conv-item .conv-name { font-weight: 600; font-size: 14px; display: flex; justify-content: space-between; }
.conv-item .conv-preview { color: var(--text-sub); font-size: 12px; margin-top: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv-item .conv-time { color: #94a3b8; font-size: 11px; }
.chat-panel { flex: 1; background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); display: flex; flex-direction: column; overflow: hidden; }
.chat-empty { flex: 1; display: flex; align-items: center; justify-content: center; color: #94a3b8; text-align: center; line-height: 2; }
.chat-head { padding: 12px 16px; border-bottom: 1px solid var(--border); font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
.chat-body { flex: 1; overflow-y: auto; padding: 16px; background: #f8fafc; }
.msg { display: flex; margin-bottom: 12px; }
.msg.in { justify-content: flex-start; }
.msg.out { justify-content: flex-end; }
.msg .bubble { max-width: 70%; padding: 10px 14px; border-radius: 12px; line-height: 1.6; font-size: 14px; white-space: pre-wrap; }
.msg.in .bubble { background: #fff; border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.msg.out .bubble { background: var(--primary); color: #fff; border-bottom-right-radius: 4px; }
.msg .meta { font-size: 11px; color: #94a3b8; margin-top: 4px; }
.msg.out .meta { text-align: right; }
.chat-input-bar { padding: 12px 16px; border-top: 1px solid var(--border); display: flex; gap: 10px; }
.chat-input-bar textarea { flex: 1; border: 1px solid var(--border); border-radius: 8px; padding: 10px; resize: none; font-size: 14px; font-family: inherit; }

/* ===== 表单 ===== */
.form-row { display: flex; gap: 32px; align-items: center; }
.switch-label { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 14px; }
.switch-label input { width: 16px; height: 16px; accent-color: var(--primary); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 10px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.panel label { display: block; font-size: 13px; color: var(--text-sub); margin: 10px 0 4px; }
.panel input, .panel textarea, .panel select { width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit; }
.panel input:focus, .panel textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.12); }
.align-end { display: flex; align-items: flex-end; }
code { background: #f1f5f9; padding: 2px 6px; border-radius: 4px; font-size: 12px; color: var(--primary-dark); }

/* ===== 弹窗 ===== */
.modal-mask { position: fixed; inset: 0; background: rgba(15,23,42,.5); display: flex; align-items: center; justify-content: center; z-index: 100; }
.modal { background: #fff; border-radius: 14px; width: 520px; max-width: 94vw; max-height: 88vh; display: flex; flex-direction: column; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.modal-head { padding: 16px 20px; border-bottom: 1px solid var(--border); font-weight: 700; display: flex; justify-content: space-between; align-items: center; }
.modal-close { color: #94a3b8; font-size: 16px; }
.modal-body { padding: 20px; overflow-y: auto; }
.modal-body label { display: block; font-size: 13px; color: var(--text-sub); margin: 12px 0 4px; }
.modal-body input, .modal-body textarea, .modal-body select { width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit; }
.modal-foot { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* ===== Toast ===== */
.toast { position: fixed; top: 24px; left: 50%; transform: translateX(-50%); background: #0f172a; color: #fff; padding: 12px 24px; border-radius: 8px; font-size: 14px; opacity: 0; pointer-events: none; transition: opacity .3s; z-index: 200; }
.toast.show { opacity: 1; }

@media (max-width: 900px) {
  .sidebar { width: 64px; }
  .sidebar-logo, .nav-item span, .sidebar-footer { display: none; }
  .nav-item { text-align: center; padding: 12px 0; }
  .main { margin-left: 64px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .conv-layout { flex-direction: column; height: auto; }
  .conv-list { width: 100%; max-height: 260px; }
}