:root {
  --bg: #0f0f12;
  --bg-soft: #17171c;
  --panel: #1d1e24;
  --panel-2: #23242c;
  --border: #2c2d36;
  --text: #e6e6eb;
  --text-dim: #9b9ca6;
  --text-faint: #6b6c77;
  --accent: #7c6cf0;
  --accent-soft: rgba(124, 108, 240, 0.15);
  --user-bubble: #2b2d3a;
  --danger: #ef4444;
  --ok: #34d399;
  --code-bg: #141419;
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "Cascadia Code", Consolas, "SF Mono", Menlo, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
  overflow: hidden;
}
#app { display: flex; height: 100vh; }

/* ---------- 侧边栏 ---------- */
#sidebar {
  width: 264px;
  min-width: 264px;
  background: var(--bg-soft);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}
.sidebar-head { padding: 14px 14px 10px; }
.logo { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; padding-bottom: 12px; }
.logo span { background: linear-gradient(90deg, #a78bfa, #60a5fa); -webkit-background-clip: text; background-clip: text; color: transparent; }
#new-chat {
  width: 100%; padding: 9px 12px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--panel);
  color: var(--text); font-size: 13px; cursor: pointer; transition: all .15s;
}
#new-chat:hover { background: var(--panel-2); border-color: var(--accent); }
#conv-list { flex: 1; overflow-y: auto; padding: 4px 8px 8px; }
.conv-item {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 10px; border-radius: 9px; cursor: pointer;
  color: var(--text-dim); transition: background .12s; position: relative;
}
.conv-item:hover { background: var(--panel); color: var(--text); }
.conv-item.active { background: var(--accent-soft); color: var(--text); }
.conv-item .conv-title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.conv-item .conv-mode { font-size: 11px; opacity: .85; }
.conv-item .conv-del {
  visibility: hidden; border: none; background: none; color: var(--text-faint);
  font-size: 13px; cursor: pointer; padding: 2px 4px; border-radius: 6px; line-height: 1;
}
.conv-item:hover .conv-del { visibility: visible; }
.conv-item .conv-del:hover { color: var(--danger); background: rgba(239,68,68,.12); }
.conv-item .conv-time { font-size: 10px; color: var(--text-faint); }
.sidebar-foot {
  padding: 10px 14px; font-size: 11px; color: var(--text-faint);
  border-top: 1px solid var(--border);
}

/* ---------- 主区域 ---------- */
#main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
#topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 20px; border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
#conv-title { font-size: 15px; font-weight: 600; }
#conv-sub { font-size: 12px; color: var(--text-faint); margin-top: 2px; }
.mode-switch {
  display: flex; background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; padding: 3px; gap: 2px;
}
.mode-btn {
  border: none; background: transparent; color: var(--text-dim);
  padding: 6px 14px; border-radius: 8px; font-size: 13px; cursor: pointer; transition: all .15s;
}
.mode-btn:hover { color: var(--text); }
.mode-btn.active { background: var(--accent); color: #fff; }

/* ---------- 消息区 ---------- */
#messages { flex: 1; overflow-y: auto; padding: 24px 0 12px; scroll-behavior: smooth; }
.msg { max-width: 860px; margin: 0 auto 22px; padding: 0 24px; }
.msg.user { display: flex; justify-content: flex-end; }
.msg.user .bubble {
  background: var(--user-bubble); border: 1px solid var(--border);
  padding: 10px 14px; border-radius: 14px 14px 4px 14px; max-width: 78%;
  white-space: pre-wrap; word-break: break-word;
}
.msg.assistant .body { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 18px; }
.msg.assistant .who { font-size: 12px; color: var(--text-faint); margin-bottom: 8px; display: flex; align-items: center; gap: 6px; }
.msg .md { word-break: break-word; overflow-wrap: anywhere; }
.msg .md > :first-child { margin-top: 0; }
.msg .md > :last-child { margin-bottom: 0; }
.msg .md p { margin: 8px 0; }
.msg .md h1, .msg .md h2, .msg .md h3, .msg .md h4 { margin: 14px 0 8px; line-height: 1.4; }
.msg .md h1 { font-size: 19px; } .msg .md h2 { font-size: 17px; } .msg .md h3 { font-size: 15px; }
.msg .md ul, .msg .md ol { margin: 8px 0; padding-left: 22px; }
.msg .md li { margin: 3px 0; }
.msg .md blockquote { border-left: 3px solid var(--accent); padding: 2px 12px; color: var(--text-dim); margin: 8px 0; background: rgba(255,255,255,.02); }
.msg .md a { color: #8ab4ff; }
.msg .md hr { border: none; border-top: 1px solid var(--border); margin: 14px 0; }
.msg .md code { font-family: var(--mono); font-size: 12.5px; background: var(--code-bg); padding: 2px 5px; border-radius: 5px; color: #e8c9ff; }
.msg .md pre {
  position: relative; background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 14px; margin: 10px 0; overflow-x: auto;
}
.msg .md pre code { background: none; padding: 0; color: #d6d6e0; font-size: 12.5px; white-space: pre; }
.msg .md table { border-collapse: collapse; margin: 10px 0; width: 100%; font-size: 13px; }
.msg .md th, .msg .md td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.msg .md th { background: var(--panel-2); }
.msg .md img { max-width: 100%; border-radius: 8px; }
.copy-btn {
  position: absolute; top: 8px; right: 8px; font-size: 11px; padding: 3px 9px;
  border-radius: 6px; border: 1px solid var(--border); background: var(--panel-2);
  color: var(--text-dim); cursor: pointer; opacity: 0; transition: opacity .15s;
}
.msg .md pre:hover .copy-btn { opacity: 1; }
.copy-btn:hover { color: var(--text); border-color: var(--accent); }

/* 思考过程 */
.reasoning {
  border-top: 1px dashed var(--border); margin-top: 10px; padding-top: 8px;
}
.reasoning summary {
  cursor: pointer; font-size: 12px; color: var(--text-faint);
  user-select: none; list-style: none; display: flex; align-items: center; gap: 6px;
}
.reasoning summary::before { content: "🧠"; }
.reasoning[open] summary { margin-bottom: 8px; }
.reasoning .reasoning-body {
  font-size: 12.5px; color: var(--text-dim); background: rgba(255,255,255,.02);
  border-radius: 8px; padding: 10px 12px; white-space: pre-wrap; max-height: 300px; overflow-y: auto;
}

/* 状态与流式 */
.cursor { display: inline-block; width: 8px; height: 15px; background: var(--accent); margin-left: 2px; vertical-align: text-bottom; animation: blink 1s infinite; border-radius: 2px; }
@keyframes blink { 50% { opacity: 0; } }
.msg.error .body { border-color: rgba(239,68,68,.5); }
.msg.error .err-box { color: var(--danger); font-size: 13px; }
.info-line { text-align: center; font-size: 12px; color: var(--text-faint); margin: 6px auto; }

/* ---------- 输入区 ---------- */
#composer { padding: 8px 24px 18px; }
#composer-inner {
  max-width: 860px; margin: 0 auto; background: var(--panel);
  border: 1px solid var(--border); border-radius: 14px; padding: 10px 12px 8px;
  transition: border-color .15s;
}
#composer-inner:focus-within { border-color: var(--accent); }
#input {
  width: 100%; background: transparent; border: none; outline: none;
  color: var(--text); font-family: var(--font); font-size: 14px;
  resize: none; max-height: 220px; line-height: 1.6;
}
#input::placeholder { color: var(--text-faint); }
.composer-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; margin-top: 6px; }
#composer-hint { flex: 1; font-size: 11px; color: var(--text-faint); }
.btn-send {
  border: none; background: var(--accent); color: #fff; font-size: 13px;
  padding: 7px 16px; border-radius: 9px; cursor: pointer; transition: opacity .15s;
}
.btn-send:disabled { opacity: .4; cursor: not-allowed; }
.btn-stop {
  border: 1px solid var(--danger); background: rgba(239,68,68,.12); color: var(--danger);
  font-size: 12px; padding: 7px 14px; border-radius: 9px; cursor: pointer;
}
.composer-foot { text-align: center; font-size: 11px; color: var(--text-faint); margin-top: 8px; }

/* 空状态 */
#empty-state {
  max-width: 560px; margin: 12vh auto 0; text-align: center; padding: 0 24px;
}
#empty-state h2 { font-size: 22px; margin-bottom: 10px; }
#empty-state p { color: var(--text-dim); font-size: 14px; margin-bottom: 6px; }
#empty-state .chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 18px; }
#empty-state .chip {
  border: 1px solid var(--border); background: var(--panel); color: var(--text-dim);
  border-radius: 999px; padding: 7px 14px; font-size: 12.5px; cursor: pointer; transition: all .15s;
}
#empty-state .chip:hover { border-color: var(--accent); color: var(--text); }

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #3a3b47; }
/* ========== 登录 / 注册 ========== */
#auth-view {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(1200px 600px at 20% -10%, rgba(124,108,240,.18), transparent 60%),
    radial-gradient(900px 500px at 100% 110%, rgba(96,165,250,.12), transparent 60%),
    var(--bg);
}
.auth-card {
  width: 360px; max-width: 92vw; background: var(--panel);
  border: 1px solid var(--border); border-radius: 18px; padding: 34px 32px 28px;
  box-shadow: 0 20px 60px rgba(0,0,0,.45);
}
.auth-logo { font-size: 22px; font-weight: 700; text-align: center; display: flex; align-items: center; justify-content: center; gap: 8px; }
.auth-logo span { background: linear-gradient(90deg, #a78bfa, #60a5fa); -webkit-background-clip: text; background-clip: text; color: transparent; }
.auth-sub { text-align: center; color: var(--text-faint); font-size: 12.5px; margin: 6px 0 22px; }
.auth-tabs {
  display: flex; background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 10px; padding: 3px; gap: 2px; margin-bottom: 18px;
}
.auth-tab {
  flex: 1; border: none; background: transparent; color: var(--text-dim);
  padding: 8px 0; border-radius: 8px; font-size: 13.5px; cursor: pointer; transition: all .15s;
}
.auth-tab:hover { color: var(--text); }
.auth-tab.active { background: var(--accent); color: #fff; }
#auth-form { display: flex; flex-direction: column; gap: 12px; }
#auth-form input {
  width: 100%; padding: 11px 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg-soft);
  color: var(--text); font-size: 14px; outline: none; transition: border-color .15s;
}
#auth-form input:focus { border-color: var(--accent); }
#auth-submit {
  margin-top: 4px; padding: 11px 0; border: none; border-radius: 10px;
  background: var(--accent); color: #fff; font-size: 14.5px; font-weight: 600;
  cursor: pointer; transition: opacity .15s;
}
#auth-submit:hover { opacity: .9; }
#auth-submit:disabled { opacity: .5; cursor: not-allowed; }
.auth-msg { min-height: 18px; font-size: 12.5px; color: var(--danger); text-align: center; }
.auth-msg.ok { color: var(--ok); }

/* ========== 侧边栏用户信息 / 登出 ========== */
.user-info {
  font-size: 12px; color: var(--text-dim); padding: 2px 2px 8px;
  display: flex; align-items: center; gap: 6px; overflow: hidden;
}
.user-info .avatar {
  width: 22px; height: 22px; border-radius: 50%; flex-shrink: 0;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700;
}
.user-info .uname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.logout-btn {
  width: 100%; margin-bottom: 8px; padding: 7px 0; font-size: 12.5px;
  border-radius: 9px; border: 1px solid var(--border); background: transparent;
  color: var(--text-dim); cursor: pointer; transition: all .15s;
}
.logout-btn:hover { color: var(--danger); border-color: rgba(239,68,68,.5); background: rgba(239,68,68,.08); }
.foot-status { font-size: 11px; color: var(--text-faint); }
/* ========== 微信一键登录 ========== */
.auth-divider { display: flex; align-items: center; gap: 10px; margin: 18px 0 12px; color: var(--text-faint); font-size: 12px; }
.auth-divider::before, .auth-divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.wechat-btn {
  width: 100%; display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 0; border-radius: 10px; border: 1px solid #07c160;
  background: rgba(7,193,96,.08); color: #07c160; font-size: 14px; font-weight: 600; cursor: pointer;
  transition: all .15s;
}
.wechat-btn:hover { background: rgba(7,193,96,.16); }

/* 微信二维码弹窗 */
.modal-overlay[hidden] { display: none; }
.modal-overlay {
  position: fixed; inset: 0; z-index: 200; display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.6); backdrop-filter: blur(2px);
}
.modal-card {
  width: 340px; max-width: 92vw; background: var(--panel); border: 1px solid var(--border);
  border-radius: 16px; padding: 18px; box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.modal-head { display: flex; align-items: center; justify-content: space-between; font-size: 14.5px; font-weight: 600; margin-bottom: 14px; }
.modal-close { border: none; background: transparent; color: var(--text-dim); font-size: 16px; cursor: pointer; padding: 2px 6px; border-radius: 6px; }
.modal-close:hover { color: var(--text); background: var(--panel-2); }
.modal-body { text-align: center; }
#wechat-qr { width: 280px; height: 300px; border: 1px solid var(--border); border-radius: 10px; background: #fff; }
.modal-tip { margin-top: 12px; font-size: 12.5px; color: var(--text-dim); line-height: 1.7; }

/* ========== 语音输入 ========== */
.btn-voice {
  width: 34px; height: 34px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text-dim); font-size: 16px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; transition: all .15s;
}
.btn-voice:hover { color: var(--text); border-color: var(--accent); }
.btn-voice.recording {
  color: #fff; border-color: var(--danger); background: rgba(239,68,68,.25);
  animation: pulse 1.2s infinite;
}
@keyframes pulse { 50% { box-shadow: 0 0 0 6px rgba(239,68,68,.12); } }

/* ========== 技能区块 ========== */
.skills-section { padding: 6px 8px; border-top: 1px solid var(--border); }
.skills-head { display: flex; align-items: center; justify-content: space-between; padding: 6px 10px 4px; }
.skills-title { font-size: 12px; color: var(--text-faint); font-weight: 600; letter-spacing: .5px; }
.skill-add { border: none; background: transparent; color: var(--text-faint); cursor: pointer; font-size: 14px; padding: 2px 6px; border-radius: 6px; line-height: 1; }
.skill-add:hover { color: var(--accent); background: var(--accent-soft); }
.skills-list { display: flex; flex-direction: column; gap: 2px; max-height: 38vh; overflow-y: auto; }
.skill-item { display: flex; align-items: center; gap: 6px; padding: 7px 10px; border-radius: 8px; color: var(--text-dim); font-size: 13px; transition: background .12s; }
.skill-item:hover { background: var(--panel); color: var(--text); }
.skill-item .skill-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.skill-item .skill-actions { display: flex; gap: 2px; opacity: .4; }
.skill-item:hover .skill-actions { opacity: 1; }
.skill-item .skill-act { border: none; background: none; color: var(--text-faint); cursor: pointer; font-size: 12px; padding: 2px 5px; border-radius: 5px; line-height: 1; }
.skill-item .skill-act:hover { color: var(--accent); background: var(--accent-soft); }
.skill-item .skill-act.del:hover { color: var(--danger); background: rgba(239,68,68,.12); }
.skill-empty { padding: 6px 10px; font-size: 12px; color: var(--text-faint); }
.skill-form { display: flex; flex-direction: column; gap: 10px; }
.skill-form input, .skill-form textarea { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg-soft); color: var(--text); font-size: 13.5px; outline: none; font-family: inherit; resize: none; }
.skill-form input:focus, .skill-form textarea:focus { border-color: var(--accent); }

/* 后台管理入口 */
.admin-link-btn {
  width: 100%; margin-bottom: 8px; padding: 7px 0; font-size: 12.5px;
  border-radius: 9px; border: 1px solid var(--border); background: transparent;
  color: var(--accent); cursor: pointer; transition: all .15s;
}
.admin-link-btn:hover { color: #fff; border-color: var(--accent); background: var(--accent); }

/* 剩余次数 */
.quota-info { font-size: 12px; color: var(--accent); padding: 0 2px 8px; }

/* 管理员登录入口 */
.admin-login-btn {
  width: 100%; margin-bottom: 8px; padding: 7px 0; font-size: 12.5px;
  border-radius: 9px; border: 1px solid var(--border); background: transparent;
  color: var(--text-faint); cursor: pointer; transition: all .15s;
}
.admin-login-btn:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }

.switch-link { color: var(--text-faint); text-decoration: none; }
.switch-link:hover { color: var(--accent); }