/* =========================================================
   智汇知识库 · 全局样式
   ========================================================= */
:root {
  --primary: #3b6df6;
  --primary-dark: #2b55d6;
  --primary-soft: #eaf0ff;
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1e293b;
  --text-2: #64748b;
  --text-3: #94a3b8;
  --border: #e5e9f2;
  --border-strong: #d5dbe8;
  --success: #0f9d76;
  --success-soft: #e6f7f1;
  --warning: #d97706;
  --warning-soft: #fef3e2;
  --danger: #dc2626;
  --danger-soft: #feecec;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px rgba(15, 23, 42, .05);
  --shadow-lg: 0 20px 60px rgba(15, 23, 42, .16);
  --sidebar-w: 236px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 600; color: var(--text); }
p { margin: 0 0 10px; }
ul { margin: 0; padding-left: 20px; }
img { max-width: 100%; }
code { background: #f1f4fa; padding: 1px 5px; border-radius: 4px; font-size: 12px; color: #b02a58; }
small { color: var(--text-3); }
hr { border: 0; border-top: 1px solid var(--border); margin: 18px 0; }
::-webkit-scrollbar { width: 7px; height: 7px; }
::-webkit-scrollbar-thumb { background: #c7d0e0; border-radius: 4px; }
::-webkit-scrollbar-track { background: transparent; }

/* ---------------- 布局 ---------------- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w);
  flex: 0 0 var(--sidebar-w);
  background: #101a33;
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 50;
  transition: transform .22s ease;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 22px 20px 18px;
  color: #fff;
}
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, #5b8cff, #3b6df6);
  display: grid; place-items: center;
  font-weight: 700; color: #fff; font-size: 16px;
  box-shadow: 0 6px 16px rgba(59, 109, 246, .4);
}
.brand-text { font-size: 16px; font-weight: 600; letter-spacing: .3px; }
.brand-sub { font-size: 11px; color: #7d8db3; margin-top: -2px; }
.sidebar-nav { flex: 1; overflow-y: auto; padding: 8px 12px 20px; }
.nav-group-title {
  font-size: 11px; color: #66779c; letter-spacing: 1px;
  padding: 16px 10px 7px; text-transform: uppercase;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 9px;
  color: #b8c4dc; font-size: 13.5px; margin-bottom: 2px;
  transition: all .15s;
}
.nav-item:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; box-shadow: 0 6px 16px rgba(59,109,246,.35); }
.nav-item .ico { width: 18px; height: 18px; flex: 0 0 18px; opacity: .9; }
.sidebar-foot { padding: 14px 20px; font-size: 11px; color: #61708f; border-top: 1px solid rgba(255,255,255,.06); }

.main { flex: 1; margin-left: var(--sidebar-w); min-width: 0; display: flex; flex-direction: column; }
.topbar {
  height: 64px; background: rgba(255,255,255,.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 14px;
  padding: 0 24px; position: sticky; top: 0; z-index: 40;
}
.topbar-title { font-size: 16px; font-weight: 600; }
.topbar-sub { font-size: 12px; color: var(--text-3); }
.topbar-spacer { flex: 1; }
.menu-toggle { display: none; border: 0; background: transparent; padding: 6px; cursor: pointer; }

.page { padding: 24px; max-width: 1500px; width: 100%; }
.page-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 18px; flex-wrap: wrap; }
.page-head h1 { font-size: 21px; }
.page-head .desc { color: var(--text-2); font-size: 13px; margin-top: 3px; }
.page-head-actions { margin-left: auto; display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------------- 通用组件 ---------------- */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.card-head { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.card-head h3 { font-size: 15px; }
.card-head .sub { font-size: 12px; color: var(--text-3); }
.card-head .right { margin-left: auto; }
.card-body { padding: 20px; }
.card-body.p0 { padding: 0; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-0 { margin-bottom: 0; } .mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; }
.muted { color: var(--text-2); }
.tiny { font-size: 12px; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.nowrap { white-space: nowrap; }
.flex-1 { flex: 1; min-width: 0; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 36px; padding: 0 15px; border-radius: 9px;
  border: 1px solid var(--border-strong); background: #fff; color: var(--text);
  font-size: 13.5px; font-family: inherit; cursor: pointer;
  transition: all .15s; white-space: nowrap; text-decoration: none;
}
.btn:hover { border-color: #b9c4d8; background: #fafbfe; color: var(--text); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; }
.btn-danger { background: #fff; border-color: #f3c1c1; color: var(--danger); }
.btn-danger:hover { background: var(--danger-soft); }
.btn-ghost { border-color: transparent; background: transparent; color: var(--text-2); }
.btn-ghost:hover { background: #eef1f7; }
.btn-sm { height: 30px; padding: 0 10px; font-size: 12.5px; border-radius: 7px; }
.btn-lg { height: 44px; padding: 0 22px; font-size: 15px; border-radius: 10px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn .ico { width: 16px; height: 16px; }

.input, .select, .textarea {
  width: 100%; height: 38px; padding: 0 11px;
  border: 1px solid var(--border-strong); border-radius: 9px;
  background: #fff; font-size: 13.5px; color: var(--text);
  font-family: inherit; outline: none; transition: border .15s, box-shadow .15s;
}
.textarea { height: auto; min-height: 90px; padding: 9px 11px; resize: vertical; line-height: 1.6; }
.input:focus, .select:focus, .textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59,109,246,.12); }
.input::placeholder, .textarea::placeholder { color: #a8b3c6; }
.select { appearance: none; background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; padding-right: 30px; }
.form-row { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; color: #334155; }
.form-hint { font-size: 11.5px; color: var(--text-3); margin-top: 5px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.checkbox, .radio { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; cursor: pointer; }
.checkbox input, .radio input { width: 15px; height: 15px; accent-color: var(--primary); }
.switch { position: relative; display: inline-flex; align-items: center; gap: 9px; cursor: pointer; font-size: 13px; }
.switch input { position: absolute; opacity: 0; }
.switch .track { width: 38px; height: 21px; background: #cbd5e1; border-radius: 20px; position: relative; transition: .18s; }
.switch .track::after { content: ''; position: absolute; width: 17px; height: 17px; background: #fff; border-radius: 50%; top: 2px; left: 2px; transition: .18s; box-shadow: 0 1px 3px rgba(0,0,0,.2); }
.switch input:checked + .track { background: var(--primary); }
.switch input:checked + .track::after { transform: translateX(17px); }
.search-box { position: relative; }
.search-box .ico { position: absolute; left: 11px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; color: var(--text-3); }
.search-box .input { padding-left: 34px; }

.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 9px; border-radius: 30px; font-size: 11.5px; font-weight: 500;
  background: #f1f4fa; color: var(--text-2); line-height: 1.7;
}
.badge-success { background: var(--success-soft); color: #0b7a5c; }
.badge-warning { background: var(--warning-soft); color: #a35b04; }
.badge-danger { background: var(--danger-soft); color: #b91c1c; }
.badge-primary { background: var(--primary-soft); color: var(--primary-dark); }
.badge-muted { background: #f1f4fa; color: var(--text-2); }
.dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th {
  text-align: left; font-weight: 500; color: var(--text-2);
  background: #f8fafd; padding: 10px 14px; border-bottom: 1px solid var(--border);
  white-space: nowrap; font-size: 12px; letter-spacing: .2px;
}
.table td { padding: 12px 14px; border-bottom: 1px solid #eef1f7; vertical-align: middle; }
.table tr:last-child td { border-bottom: 0; }
.table tr:hover td { background: #fafbfe; }
.table .actions { display: flex; gap: 6px; flex-wrap: wrap; }
.table-ellipsis { max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.pager { display: flex; align-items: center; gap: 6px; padding: 14px 18px; flex-wrap: wrap; }
.page-link { display: inline-flex; align-items: center; justify-content: center; min-width: 32px; height: 32px; padding: 0 9px; border-radius: 7px; border: 1px solid var(--border); color: var(--text-2); font-size: 12.5px; }
.page-link:hover { border-color: var(--primary); color: var(--primary); }
.page-link.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.page-link.disabled { opacity: .4; pointer-events: none; }
.page-dots { color: var(--text-3); }
.page-total { margin-left: auto; font-size: 12px; color: var(--text-3); }

.empty { padding: 46px 20px; text-align: center; color: var(--text-3); }
.empty .empty-icon { width: 54px; height: 54px; border-radius: 16px; background: #eef2fa; display: grid; place-items: center; margin: 0 auto 12px; color: #9aa8c0; }
.empty h4 { color: var(--text-2); margin-bottom: 4px; }
.empty p { font-size: 12.5px; }

/* ---------------- 登录页 ---------------- */
.auth-wrap { min-height: 100vh; display: flex; background: #f4f6fb; }
.auth-side {
  flex: 1; background: radial-gradient(circle at 20% 20%, #1e3a8a, #0b1226 60%);
  color: #fff; padding: 56px; display: flex; flex-direction: column; justify-content: space-between;
  position: relative; overflow: hidden;
}
.auth-side::before, .auth-side::after {
  content: ''; position: absolute; border-radius: 50%; opacity: .35; filter: blur(2px);
}
.auth-side::before { width: 420px; height: 420px; border: 1px solid rgba(255,255,255,.14); right: -120px; top: -80px; }
.auth-side::after { width: 620px; height: 620px; border: 1px solid rgba(255,255,255,.08); right: -220px; bottom: -260px; }
.auth-brand { display: flex; align-items: center; gap: 12px; position: relative; z-index: 2; }
.auth-side h1 { font-size: 38px; line-height: 1.3; margin: 40px 0 16px; letter-spacing: 1px; position: relative; z-index: 2; }
.auth-side .lead { color: #a8b8d8; font-size: 15px; max-width: 420px; position: relative; z-index: 2; }
.auth-features { display: grid; gap: 14px; margin-top: 34px; position: relative; z-index: 2; }
.auth-feature { display: flex; gap: 12px; align-items: flex-start; }
.auth-feature .fi { width: 34px; height: 34px; border-radius: 9px; background: rgba(255,255,255,.1); display: grid; place-items: center; flex: 0 0 34px; }
.auth-feature b { display: block; font-size: 13.5px; font-weight: 500; }
.auth-feature span { font-size: 12px; color: #93a4c6; }
.auth-foot { font-size: 12px; color: #6b7c9e; position: relative; z-index: 2; }
.auth-main { flex: 0 0 460px; display: flex; align-items: center; justify-content: center; padding: 40px; background: #fff; }
.auth-form { width: 100%; max-width: 340px; }
.auth-form h2 { font-size: 24px; margin-bottom: 6px; }
.auth-form .sub { color: var(--text-2); font-size: 13px; margin-bottom: 28px; }
.auth-form .form-row { margin-bottom: 18px; }
.auth-form .input { height: 44px; }
.auth-extra { display: flex; justify-content: space-between; align-items: center; margin: -4px 0 20px; font-size: 12.5px; }
.alert { padding: 10px 13px; border-radius: 9px; font-size: 13px; margin-bottom: 16px; }
.alert-error { background: var(--danger-soft); color: #b91c1c; border: 1px solid #f7d4d4; }
.alert-info { background: var(--primary-soft); color: var(--primary-dark); border: 1px solid #d8e4ff; }
.alert-success { background: var(--success-soft); color: #0b7a5c; border: 1px solid #ccefe2; }
.alert-warning { background: var(--warning-soft); color: #92400e; border: 1px solid #fae3bd; }

/* ---------------- 工作台 ---------------- */
.stat-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow); }
.stat-top { display: flex; align-items: center; justify-content: space-between; }
.stat-label { color: var(--text-2); font-size: 12.5px; }
.stat-icon { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary); }
.stat-value { font-size: 26px; font-weight: 600; margin-top: 6px; letter-spacing: .5px; }
.stat-foot { font-size: 11.5px; color: var(--text-3); margin-top: 4px; }

.kb-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow); transition: transform .15s, box-shadow .15s;
  display: flex; flex-direction: column; gap: 12px;
}
.kb-card:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(15,23,42,.09); }
.kb-icon { width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center; color: #fff; font-weight: 600; font-size: 17px; }
.kb-title { font-size: 15px; font-weight: 600; }
.kb-desc { font-size: 12.5px; color: var(--text-2); min-height: 38px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.kb-meta { display: flex; gap: 14px; font-size: 11.5px; color: var(--text-3); border-top: 1px dashed var(--border); padding-top: 11px; }
.kb-meta b { color: var(--text-2); font-weight: 500; }

.list-item { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid #eef1f7; align-items: center; }
.list-item:last-child { border-bottom: 0; }
.list-ico { width: 36px; height: 36px; border-radius: 9px; background: #f1f4fb; display: grid; place-items: center; color: var(--text-2); flex: 0 0 36px; }
.list-title { font-size: 13.5px; font-weight: 500; color: var(--text); }
.list-sub { font-size: 11.5px; color: var(--text-3); }

.announce { padding: 12px 14px; border-radius: 10px; background: var(--primary-soft); border-left: 3px solid var(--primary); margin-bottom: 10px; }
.announce.warning { background: var(--warning-soft); border-color: var(--warning); }
.announce.success { background: var(--success-soft); border-color: var(--success); }
.announce b { font-size: 13px; display: block; margin-bottom: 2px; }
.announce p { font-size: 12.5px; color: var(--text-2); margin: 0; }

/* ---------------- 对话框页面（知识库详情） ---------------- */
.chat-shell { display: flex; height: calc(100vh - 64px); overflow: hidden; background: #fff; }
.chat-side {
  width: 290px; flex: 0 0 290px; border-right: 1px solid var(--border);
  display: flex; flex-direction: column; background: #fbfcff;
}
.chat-side-head { padding: 16px; border-bottom: 1px solid var(--border); }
.chat-side-head .kb-name { font-weight: 600; font-size: 14px; }
.doc-search { margin-top: 10px; }
.tree { flex: 1; overflow-y: auto; padding: 10px 10px 20px; }
.tree-group { margin-bottom: 4px; }
.tree-folder {
  display: flex; align-items: center; gap: 6px; padding: 7px 8px;
  border-radius: 7px; cursor: pointer; font-size: 13px; color: #334155; user-select: none;
}
.tree-folder:hover { background: #eef2fa; }
.tree-folder .chev { width: 14px; height: 14px; transition: transform .15s; color: var(--text-3); }
.tree-group.collapsed .chev { transform: rotate(-90deg); }
.tree-group.collapsed .tree-children { display: none; }
.tree-children { padding-left: 12px; }
.tree-doc {
  display: flex; align-items: center; gap: 7px; padding: 7px 8px;
  border-radius: 7px; font-size: 12.5px; color: var(--text-2);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.tree-doc:hover { background: var(--primary-soft); color: var(--primary-dark); }
.tree-doc .ico { width: 15px; height: 15px; flex: 0 0 15px; color: var(--text-3); }
.tree-doc.disabled { opacity: .55; }

.chat-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.chat-head {
  display: flex; align-items: center; gap: 12px; padding: 12px 20px;
  border-bottom: 1px solid var(--border); background: #fff;
}
.chat-head .conv-title { font-weight: 600; font-size: 14px; }
.chat-head .conv-meta { font-size: 11.5px; color: var(--text-3); }
.chat-head-actions { margin-left: auto; display: flex; gap: 6px; }
.conv-select { max-width: 220px; height: 32px; font-size: 12.5px; }

.chat-body { flex: 1; overflow-y: auto; padding: 26px 24px 10px; background: linear-gradient(180deg, #fbfcff, #fff 240px); }
.chat-inner { max-width: 860px; margin: 0 auto; }
.msg { display: flex; gap: 12px; margin-bottom: 24px; }
.msg.user { flex-direction: row-reverse; }
.avatar {
  width: 34px; height: 34px; border-radius: 10px; flex: 0 0 34px;
  display: grid; place-items: center; font-size: 12px; font-weight: 600;
}
.msg.user .avatar { background: var(--primary); color: #fff; }
.msg.ai .avatar { background: #eef2fa; color: var(--primary); }
.bubble { max-width: calc(100% - 60px); }
.msg.user .bubble { background: var(--primary); color: #fff; padding: 11px 15px; border-radius: 14px 14px 4px 14px; font-size: 13.5px; }
.msg.ai .bubble { background: #fff; border: 1px solid var(--border); padding: 14px 17px; border-radius: 4px 14px 14px 14px; font-size: 13.5px; box-shadow: 0 2px 10px rgba(15,23,42,.03); }
.msg.ai .bubble p { margin: 0 0 7px; }
.msg.ai .bubble p:last-child { margin-bottom: 0; }
.msg.ai .bubble ul { margin: 6px 0 9px; padding-left: 20px; }
.msg.ai .bubble li { margin-bottom: 3px; }
.msg.ai .bubble .src-line { color: var(--text-2); font-size: 12.5px; margin-top: 8px; }
.cite-num { color: var(--primary); font-weight: 600; font-size: 11px; background: var(--primary-soft); padding: 0 3px; border-radius: 4px; }
.msg-tools { display: flex; gap: 5px; margin-top: 9px; align-items: center; flex-wrap: wrap; }
.msg-tool {
  border: 0; background: transparent; color: var(--text-3); font-size: 11.5px;
  cursor: pointer; padding: 3px 6px; border-radius: 5px; display: inline-flex; align-items: center; gap: 4px;
}
.msg-tool:hover { background: #f1f4fa; color: var(--text-2); }
.msg-tool.active { color: var(--primary); background: var(--primary-soft); }
.msg-tool .ico { width: 13px; height: 13px; }
.msg-time { font-size: 10.5px; color: #b3bdce; margin-top: 6px; }
.citations { margin-top: 11px; border-top: 1px dashed var(--border); padding-top: 9px; }
.citations-title { font-size: 11px; color: var(--text-3); margin-bottom: 6px; letter-spacing: .3px; }
.citation-chip {
  display: inline-flex; align-items: center; gap: 6px; max-width: 100%;
  background: #f7f9fd; border: 1px solid var(--border); border-radius: 7px;
  padding: 4px 9px; margin: 0 5px 5px 0; font-size: 11.5px; color: var(--text-2); cursor: pointer;
}
.citation-chip:hover { border-color: var(--primary); color: var(--primary); }
.citation-chip .num { background: var(--primary); color: #fff; border-radius: 4px; padding: 0 4px; font-size: 10px; }
.citation-chip .title { max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ai-disclaimer { font-size: 11px; color: var(--text-3); margin-top: 8px; padding-left: 2px; }

.chat-empty { height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 40px; }
.chat-empty .big { width: 64px; height: 64px; border-radius: 18px; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; margin-bottom: 16px; }
.chat-empty h3 { font-size: 20px; margin-bottom: 6px; }
.chat-empty p { color: var(--text-2); font-size: 13px; }
.suggest-row { display: flex; gap: 9px; flex-wrap: wrap; justify-content: center; margin-top: 20px; }
.suggest {
  border: 1px solid var(--border); background: #fff; border-radius: 9px; padding: 8px 13px;
  font-size: 12.5px; color: var(--text-2); cursor: pointer;
}
.suggest:hover { border-color: var(--primary); color: var(--primary); }

.composer-wrap { padding: 10px 24px 16px; background: #fff; }
.composer { max-width: 860px; margin: 0 auto; border: 1px solid var(--border-strong); border-radius: 14px; padding: 9px 10px 9px 14px; background: #fff; box-shadow: 0 4px 20px rgba(15,23,42,.05); }
.composer:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59,109,246,.1); }
.composer textarea {
  width: 100%; border: 0; outline: none; resize: none; font-family: inherit;
  font-size: 14px; line-height: 1.6; max-height: 150px; min-height: 24px; padding: 2px 0; color: var(--text);
}
.composer-bar { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.composer-bar .hint { font-size: 11px; color: var(--text-3); }
.composer-bar .right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.attach-btn { border: 0; background: transparent; color: var(--text-3); cursor: pointer; padding: 4px; border-radius: 6px; }
.attach-btn:hover { background: #f1f4fa; color: var(--primary); }
.attach-list { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 5px; }
.attach-item { display: inline-flex; align-items: center; gap: 5px; background: #f1f4fa; border-radius: 6px; padding: 3px 7px; font-size: 11px; color: var(--text-2); }
.attach-item button { border: 0; background: transparent; cursor: pointer; color: var(--text-3); padding: 0; line-height: 1; }
.send-btn { width: 34px; height: 34px; border-radius: 9px; border: 0; background: var(--primary); color: #fff; cursor: pointer; display: grid; place-items: center; }
.send-btn:hover { background: var(--primary-dark); }
.send-btn:disabled { opacity: .5; cursor: not-allowed; }
.typing { display: inline-flex; gap: 4px; align-items: center; color: var(--text-3); font-size: 12px; }
.typing i { width: 5px; height: 5px; background: #b6c2d6; border-radius: 50%; animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .2s; }
.typing i:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }

/* ---------------- 文档预览 ---------------- */
.doc-layout { display: grid; grid-template-columns: 1fr 300px; gap: 18px; align-items: start; }
.pdf-frame { width: 100%; height: calc(100vh - 190px); border: 0; border-radius: var(--radius); background: #e9edf5; }
.doc-text { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 34px; max-height: calc(100vh - 190px); overflow-y: auto; }
.doc-text h4 { font-size: 13px; color: var(--text-3); border-bottom: 1px solid var(--border); padding-bottom: 8px; margin: 22px 0 12px; }
.doc-text h4:first-child { margin-top: 0; }
.doc-text p { font-size: 13.5px; line-height: 1.9; color: #334155; white-space: pre-wrap; word-break: break-word; }
.doc-text mark { background: #fff2a8; padding: 0 2px; border-radius: 2px; }
.meta-list { display: grid; gap: 12px; }
.meta-item label { font-size: 11.5px; color: var(--text-3); display: block; }
.meta-item span { font-size: 13px; }

/* ---------------- 个人中心 / 历史 ---------------- */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; overflow-x: auto; }
.tab {
  padding: 9px 15px; font-size: 13.5px; color: var(--text-2); border-bottom: 2px solid transparent;
  cursor: pointer; white-space: nowrap; background: transparent; border-top: 0; border-left: 0; border-right: 0;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 500; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.conv-row { display: flex; align-items: center; gap: 14px; padding: 14px 18px; border-bottom: 1px solid #eef1f7; }
.conv-row:last-child { border-bottom: 0; }
.conv-row:hover { background: #fafbfe; }
.conv-row .main-info { flex: 1; min-width: 0; }
.conv-row .title { font-size: 13.5px; font-weight: 500; }
.conv-row .sub { font-size: 11.5px; color: var(--text-3); margin-top: 2px; }
.conv-actions { display: flex; gap: 5px; }

/* ---------------- 弹窗 / 提示 ---------------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(15,23,42,.45); backdrop-filter: blur(2px);
  display: none; align-items: flex-start; justify-content: center; z-index: 100; padding: 40px 16px; overflow-y: auto;
}
.modal-mask.open { display: flex; }
.modal {
  background: #fff; border-radius: 16px; width: 100%; max-width: 620px;
  box-shadow: var(--shadow-lg); animation: modalIn .18s ease;
}
.modal.lg { max-width: 860px; }
.modal.sm { max-width: 430px; }
@keyframes modalIn { from { opacity: 0; transform: translateY(10px) scale(.99); } to { opacity: 1; transform: none; } }
.modal-head { padding: 18px 22px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.modal-head h3 { font-size: 16px; }
.modal-head .close { margin-left: auto; border: 0; background: transparent; cursor: pointer; color: var(--text-3); padding: 4px; border-radius: 6px; }
.modal-head .close:hover { background: #f1f4fa; }
.modal-body { padding: 22px; max-height: calc(100vh - 240px); overflow-y: auto; }
.modal-foot { padding: 15px 22px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

.toast-stack { position: fixed; top: 18px; right: 18px; z-index: 200; display: flex; flex-direction: column; gap: 9px; }
.toast {
  background: #fff; border: 1px solid var(--border); border-left: 3px solid var(--primary);
  border-radius: 10px; padding: 11px 16px; box-shadow: var(--shadow-lg); font-size: 13px;
  max-width: 420px; animation: toastIn .2s ease;
}
.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }
@keyframes toastIn { from { opacity: 0; transform: translateX(14px); } to { opacity: 1; transform: none; } }

.loading-overlay { position: fixed; inset: 0; background: rgba(255,255,255,.65); display: none; place-items: center; z-index: 300; }
.loading-overlay.open { display: grid; }
.spinner { width: 30px; height: 30px; border: 3px solid #dbe3f2; border-top-color: var(--primary); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------- 图表 ---------------- */
.chart-box { position: relative; height: 220px; width: 100%; }
.chart-box canvas { width: 100%; height: 100%; }
.legend { display: flex; gap: 16px; font-size: 11.5px; color: var(--text-2); }
.legend i { display: inline-block; width: 8px; height: 8px; border-radius: 2px; margin-right: 5px; }
.bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; font-size: 12px; }
.bar-label { width: 110px; flex: 0 0 110px; color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-track { flex: 1; height: 7px; background: #eef2fa; border-radius: 5px; overflow: hidden; }
.bar-fill { height: 100%; background: linear-gradient(90deg, #6b93ff, #3b6df6); border-radius: 5px; }
.bar-val { width: 80px; text-align: right; color: var(--text-3); font-size: 11px; }

/* ---------------- 权限矩阵 ---------------- */
.perm-table td { padding: 9px 12px; }
.perm-check { display: flex; gap: 18px; align-items: center; }
.color-dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1100px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .doc-layout { grid-template-columns: 1fr; }
  .doc-side { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
}
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: none; }
  .main { margin-left: 0; }
  .menu-toggle { display: inline-flex; }
  .auth-side { display: none; }
  .auth-main { flex: 1; }
  .grid-3 { grid-template-columns: 1fr; }
  .chat-side { display: none; }
  .page { padding: 16px; }
  .topbar { padding: 0 16px; }
}
@media (max-width: 640px) {
  .grid-2, .grid-4, .form-grid { grid-template-columns: 1fr; }
  .chat-body { padding: 18px 12px 6px; }
  .composer-wrap { padding: 8px 12px 12px; }
  .auth-main { padding: 24px; }
  .page-head-actions { width: 100%; }
  .stat-value { font-size: 22px; }
}