/* ============ 深学 DeepTutor · 轻量前端样式 ============ */

:root {
  --radius: 14px;
  --radius-sm: 10px;
  --sidebar-w: 264px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --ease: cubic-bezier(.32, .72, 0, 1);
}

/* ---- 深色（默认） ---- */
html[data-theme="dark"] {
  --bg: #0a0d12;
  --bg-soft: #0f131a;
  --panel: #12171f;
  --panel-2: #171d26;
  --border: #232b36;
  --border-soft: #1a212b;
  --text: #e8eef6;
  --text-2: #9aa7b8;
  --text-3: #64748b;
  --accent: #7c8cff;
  --accent-2: #a78bfa;
  --accent-soft: rgba(124, 140, 255, .14);
  --user-bubble: #1d2530;
  --code-bg: #0b1017;
  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;
  --shadow: 0 10px 40px rgba(0, 0, 0, .45);
}

/* ---- 浅色 ---- */
html[data-theme="light"] {
  --bg: #f5f6f8;
  --bg-soft: #eceef2;
  --panel: #ffffff;
  --panel-2: #f8f9fb;
  --border: #e2e5ea;
  --border-soft: #edeff3;
  --text: #131820;
  --text-2: #5a6472;
  --text-3: #8b95a4;
  --accent: #5566e8;
  --accent-2: #7c5cf0;
  --accent-soft: rgba(85, 102, 232, .10);
  --user-bubble: #eef0f6;
  --code-bg: #f3f4f7;
  --ok: #059669;
  --warn: #d97706;
  --err: #dc2626;
  --shadow: 0 10px 36px rgba(18, 24, 38, .10);
}

* { box-sizing: border-box; }

/* hidden 属性必须优先于任何 display 声明（.drawer 等设了 display:flex 会覆盖 UA 样式） */
[hidden] { display: none !important; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

button { font-family: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
input, textarea { font-family: inherit; }
::selection { background: var(--accent-soft); color: var(--text); }

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }
::-webkit-scrollbar-track { background: transparent; }

/* ═══════════ 侧栏 ═══════════ */
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-w);
  background: var(--bg-soft);
  border-right: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  z-index: 40;
  transition: transform .28s var(--ease);
}

.sb-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 14px 12px;
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; min-width: 0; }

.brand-mark {
  width: 34px; height: 34px;
  display: block;
  border-radius: 10px;
  flex: 0 0 auto;
  box-shadow: 0 4px 14px var(--accent-soft);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.1; min-width: 0; }
.brand-text b { font-size: 15.5px; letter-spacing: .3px; }
.brand-text i { font-style: normal; font-size: 10.5px; color: var(--text-3); letter-spacing: 1.2px; text-transform: uppercase; }

.sb-close { display: none; }

.icon-btn {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 9px;
  color: var(--text-2);
  transition: background .16s, color .16s;
  flex: 0 0 auto;
}
.icon-btn:hover { background: var(--panel-2); color: var(--text); }

.new-chat {
  display: flex; align-items: center; gap: 8px;
  margin: 4px 12px 12px;
  padding: 10px 13px;
  border-radius: var(--radius-sm);
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: border-color .16s, background .16s, transform .16s;
}
.new-chat:hover { border-color: var(--accent); background: var(--accent-soft); }
.new-chat:active { transform: scale(.985); }
.new-chat svg { width: 16px; height: 16px; color: var(--accent); }

.sb-search {
  position: relative;
  margin: 0 12px 10px;
}
.sb-search svg {
  position: absolute; left: 10px; top: 50%; transform: translateY(-50%);
  width: 15px; height: 15px; color: var(--text-3);
}
.sb-search input {
  width: 100%;
  padding: 8px 10px 8px 32px;
  background: var(--panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13.5px;
  outline: none;
  transition: border-color .16s;
}
.sb-search input::placeholder { color: var(--text-3); }
.sb-search input:focus { border-color: var(--accent); }
.sb-search input::-webkit-search-cancel-button { display: none; }

.sb-list {
  flex: 1;
  overflow-y: auto;
  padding: 2px 8px 10px;
}

.sb-group { margin: 12px 6px 4px; font-size: 11px; color: var(--text-3); letter-spacing: .6px; font-weight: 600; }

.sb-item {
  display: flex; align-items: center; gap: 9px;
  width: 100%;
  padding: 9px 10px;
  border-radius: 9px;
  color: var(--text-2);
  font-size: 13.5px;
  text-align: left;
  transition: background .14s, color .14s;
  position: relative;
}
.sb-item:hover { background: var(--panel-2); color: var(--text); }
.sb-item.active { background: var(--accent-soft); color: var(--text); }
.sb-item.active::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 2.5px; height: 15px; border-radius: 2px; background: var(--accent);
}
.sb-item .ttl {
  flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.sb-item .del {
  opacity: 0; width: 22px; height: 22px; border-radius: 6px;
  display: grid; place-items: center; color: var(--text-3); flex: 0 0 auto;
}
.sb-item .del svg { width: 14px; height: 14px; }
.sb-item:hover .del { opacity: 1; }
.sb-item .del:hover { background: rgba(248,113,113,.14); color: var(--err); }

.sb-empty { padding: 22px 12px; text-align: center; color: var(--text-3); font-size: 13px; }

.sb-foot { padding: 8px; border-top: 1px solid var(--border-soft); }
.sb-foot .sb-item { gap: 10px; }
.sb-foot .badge {
  font-style: normal; font-size: 10.5px; padding: 2px 6px; border-radius: 5px;
  background: var(--panel-2); color: var(--text-3); font-weight: 500;
}
.sb-foot .badge.warn { background: rgba(251,191,36,.14); color: var(--warn); }
.sb-foot .badge.ok { background: rgba(52,211,153,.14); color: var(--ok); }

.scrim {
  position: fixed; inset: 0; background: rgba(0,0,0,.5);
  opacity: 0; pointer-events: none; transition: opacity .25s; z-index: 35;
}

/* ═══════════ 主区 ═══════════ */
.main {
  margin-left: var(--sidebar-w);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: margin-left .28s var(--ease);
  position: relative;
}

.topbar {
  height: 56px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border-soft);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  z-index: 20;
}
.sb-open { display: none; }

.topbar-title {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.topbar-actions { display: flex; gap: 4px; }

/* 对话保存状态 */
.save-state {
  flex: 0 0 auto;
  font-size: 11.5px;
  color: var(--text-3);
  white-space: nowrap;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: color .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease);
}
.save-state.on {
  color: var(--ok);
  background: color-mix(in srgb, var(--ok) 12%, transparent);
  border-color: color-mix(in srgb, var(--ok) 30%, transparent);
}
@media (max-width: 560px) {
  .save-state { font-size: 11px; padding: 2px 6px; }
}

html[data-theme="dark"] .ic-sun { display: none; }
html[data-theme="light"] .ic-moon { display: none; }

/* ---- 空态 ---- */
.welcome {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 24px 20px 8px;
  overflow-y: auto;
}
.welcome-inner { width: 100%; max-width: 660px; text-align: center; padding-bottom: 12px; }

.welcome-mark {
  width: 54px; height: 54px; margin: 0 auto 18px;
  display: block;
  border-radius: 16px;
  box-shadow: 0 8px 26px var(--accent-soft);
}

.welcome h1 {
  margin: 0 0 8px;
  font-size: 27px;
  font-weight: 650;
  letter-spacing: -.4px;
}
.welcome-sub { margin: 0 0 26px; color: var(--text-3); font-size: 14px; }

.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 11px;
  text-align: left;
}

.mode-card {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 15px 16px 14px;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--border-soft);
  transition: border-color .18s, transform .18s var(--ease), background .18s;
}
.mode-card:hover {
  border-color: var(--accent);
  background: var(--panel-2);
  transform: translateY(-2px);
}
.mode-card b { font-size: 14.5px; font-weight: 600; }
.mode-card i { font-style: normal; font-size: 12.5px; color: var(--text-3); line-height: 1.5; }

.mode-ic {
  width: 30px; height: 30px; border-radius: 9px;
  display: grid; place-items: center;
  margin-bottom: 8px;
  background: var(--accent-soft);
  color: var(--accent);
}
.mode-ic svg { width: 16px; height: 16px; }

/* ---- 对话流 ---- */
.thread {
  flex: 1;
  overflow-y: auto;
  scroll-behavior: smooth;
}
.thread-inner {
  max-width: 780px;
  margin: 0 auto;
  padding: 24px 20px 8px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.msg { display: flex; flex-direction: column; animation: rise .26s var(--ease); }
@keyframes rise { from { opacity: 0; transform: translateY(7px); } to { opacity: 1; transform: none; } }

.msg.user { align-items: flex-end; }
.msg.user .bubble {
  max-width: 82%;
  padding: 10px 15px;
  border-radius: 16px 16px 4px 16px;
  background: var(--user-bubble);
  font-size: 14.5px;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg.ai .body { width: 100%; }

.ai-head {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 7px;
}
.ai-avatar {
  width: 24px; height: 24px; border-radius: 7px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 11.5px; font-weight: 700; flex: 0 0 auto;
}
.ai-name { font-size: 12.5px; color: var(--text-3); }

/* 折叠块：思考 / 工具 */
.fold {
  margin: 6px 0;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: var(--panel);
  overflow: hidden;
}
.fold-head {
  display: flex; align-items: center; gap: 7px;
  padding: 8px 12px;
  font-size: 12.5px;
  color: var(--text-2);
  width: 100%;
  text-align: left;
}
.fold-head svg { width: 13px; height: 13px; transition: transform .2s; color: var(--text-3); }
.fold.open .fold-head svg.chev { transform: rotate(90deg); }
.fold-head .fold-t { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fold-body {
  display: none;
  padding: 0 12px 10px;
  font-size: 12.8px;
  color: var(--text-2);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 340px;
  overflow-y: auto;
  font-family: var(--mono);
  line-height: 1.6;
}
.fold.open .fold-body { display: block; }
.fold.thinking .fold-t { color: var(--accent); }

.spin {
  width: 12px; height: 12px;
  border: 1.8px solid var(--accent-soft);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  flex: 0 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 进度行 */
.progress-line {
  display: flex; align-items: center; gap: 8px;
  font-size: 12.5px; color: var(--text-3);
  padding: 3px 0;
}

/* 正文 */
.md { font-size: 14.8px; line-height: 1.78; word-break: break-word; }
.md > *:first-child { margin-top: 0; }
.md > *:last-child { margin-bottom: 0; }
.md h1, .md h2, .md h3, .md h4 { margin: 1.1em 0 .5em; line-height: 1.4; font-weight: 650; }
.md h1 { font-size: 1.4em; }
.md h2 { font-size: 1.24em; }
.md h3 { font-size: 1.1em; }
.md p { margin: .62em 0; }
.md ul, .md ol { margin: .6em 0; padding-left: 1.5em; }
.md li { margin: .25em 0; }
.md a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent-soft); }
.md a:hover { border-bottom-color: var(--accent); }
.md code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--code-bg);
  padding: .15em .4em;
  border-radius: 5px;
  border: 1px solid var(--border-soft);
}
.md pre {
  background: var(--code-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 13px 15px;
  overflow-x: auto;
  margin: .8em 0;
}
.md pre code { background: none; border: 0; padding: 0; font-size: 12.9px; line-height: 1.62; }
.md blockquote {
  margin: .8em 0;
  padding: .3em 0 .3em 14px;
  border-left: 3px solid var(--accent-soft);
  color: var(--text-2);
}
.md table { width: 100%; border-collapse: collapse; margin: .8em 0; font-size: 13.5px; }
.md th, .md td { border: 1px solid var(--border); padding: 7px 11px; text-align: left; }
.md th { background: var(--panel-2); font-weight: 600; }
.md hr { border: 0; border-top: 1px solid var(--border-soft); margin: 1.2em 0; }
.md img { max-width: 100%; border-radius: var(--radius-sm); }

/* 来源 */
.sources { margin-top: 12px; }
.sources-t {
  font-size: 12px; color: var(--text-3); margin-bottom: 6px; font-weight: 600;
}
.src-item {
  display: block;
  padding: 7px 11px;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--border-soft);
  margin-bottom: 5px;
  font-size: 12.5px;
  color: var(--text-2);
  text-decoration: none;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.src-item:hover { border-color: var(--accent); color: var(--text); }

/* 错误 */
.err-box {
  margin-top: 10px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  background: rgba(248,113,113,.08);
  border: 1px solid rgba(248,113,113,.26);
  color: var(--err);
  font-size: 13px;
  line-height: 1.6;
}
.err-box b { display: block; margin-bottom: 3px; }

/* 等待输入 */
.ask-box {
  margin-top: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent-soft);
  background: var(--accent-soft);
  font-size: 13.5px;
}

/* 光标 */
.caret {
  display: inline-block; width: 7px; height: 15px;
  background: var(--accent); vertical-align: -2px;
  margin-left: 2px; border-radius: 2px;
  animation: blink 1.05s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ═══════════ 输入区 ═══════════ */
.composer-wrap {
  flex: 0 0 auto;
  padding: 6px 20px calc(10px + env(safe-area-inset-bottom));
  background: linear-gradient(to top, var(--bg) 62%, transparent);
}
.composer {
  max-width: 780px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 9px 11px 8px;
  transition: border-color .18s, box-shadow .18s;
}
.composer:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.composer-mode { display: flex; align-items: center; position: relative; margin-bottom: 3px; }
.mode-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 9px 4px 8px;
  border-radius: 7px;
  font-size: 12.2px;
  color: var(--text-2);
  background: var(--panel-2);
  transition: color .16s, background .16s;
}
.mode-pill:hover { color: var(--text); }
.mode-pill .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.mode-pill svg { width: 12px; height: 12px; }

.mode-menu {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  min-width: 196px;
  padding: 5px;
  border-radius: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  z-index: 30;
}
.mode-menu button {
  display: flex; flex-direction: column; gap: 1px;
  width: 100%; padding: 8px 10px; border-radius: 8px;
  text-align: left; font-size: 13px;
}
.mode-menu button:hover { background: var(--accent-soft); }
.mode-menu button span { font-size: 11px; color: var(--text-3); }
.mode-menu button.on { background: var(--accent-soft); }
.mode-menu button.on b { color: var(--accent); }

#input {
  width: 100%;
  border: 0;
  outline: none;
  resize: none;
  background: none;
  color: var(--text);
  font-size: 14.8px;
  line-height: 1.6;
  padding: 5px 2px;
  max-height: 190px;
  overflow-y: auto;
}
#input::placeholder { color: var(--text-3); }

.composer-foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-top: 2px;
}
.hint { font-size: 11.5px; color: var(--text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.composer-btns { display: flex; align-items: center; gap: 7px; flex: 0 0 auto; }

.stop-btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 11px; border-radius: 9px;
  font-size: 12.5px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text-2);
}
.stop-btn:hover { color: var(--err); border-color: var(--err); }
.stop-btn svg { width: 13px; height: 13px; }

.send-btn {
  width: 33px; height: 33px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  color: #fff;
  transition: opacity .16s, transform .16s;
}
.send-btn:disabled { opacity: .32; cursor: not-allowed; }
.send-btn:not(:disabled):hover { transform: translateY(-1px); }
.send-btn svg { width: 16px; height: 16px; stroke-width: 2.1; }

.composer-note {
  max-width: 780px;
  margin: 7px auto 0;
  text-align: center;
  font-size: 10.8px;
  color: var(--text-3);
}

/* ═══════════ 设置抽屉 ═══════════ */
.drawer-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.46);
  z-index: 60; animation: fade .2s;
}
@keyframes fade { from { opacity: 0; } }

.drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: 420px; max-width: 92vw;
  background: var(--panel);
  border-left: 1px solid var(--border);
  z-index: 61;
  display: flex; flex-direction: column;
  animation: slide-in .28s var(--ease);
  box-shadow: var(--shadow);
}
@keyframes slide-in { from { transform: translateX(100%); } }

.drawer-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 18px 12px;
}
.drawer-head h2 { margin: 0; font-size: 17px; font-weight: 650; }

.drawer-tabs {
  display: flex; gap: 4px;
  padding: 0 14px;
  border-bottom: 1px solid var(--border-soft);
}
.dt-tab {
  padding: 9px 11px;
  font-size: 13.5px;
  color: var(--text-3);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color .16s, border-color .16s;
}
.dt-tab:hover { color: var(--text-2); }
.dt-tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 550; }

.drawer-body { flex: 1; overflow-y: auto; padding: 18px; }
.dt-panel { display: none; }
.dt-panel.active { display: block; animation: fade .2s; }

.field-note {
  font-size: 12.5px;
  color: var(--text-2);
  background: var(--panel-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  line-height: 1.65;
  margin-bottom: 16px;
}
.field-note b { color: var(--text); }

.field { display: block; margin-bottom: 14px; }
.field > span {
  display: block; font-size: 12.5px; color: var(--text-2);
  margin-bottom: 6px; font-weight: 500;
}
.field input {
  width: 100%;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 13.5px;
  outline: none;
  transition: border-color .16s;
}
.field input:focus { border-color: var(--accent); }
.field input::placeholder { color: var(--text-3); }

.link-btn {
  margin-top: 7px;
  font-size: 12.2px;
  color: var(--accent);
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.field-row { display: flex; gap: 9px; margin-top: 18px; }

.btn {
  flex: 1;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 550;
  transition: opacity .16s, transform .16s, border-color .16s;
  border: 1px solid transparent;
}
.btn:active { transform: scale(.985); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary { background: linear-gradient(145deg, var(--accent), var(--accent-2)); color: #fff; }
.btn.ghost { background: var(--panel-2); border-color: var(--border); color: var(--text-2); }
.btn.ghost:hover { border-color: var(--accent); color: var(--text); }

.probe-result {
  margin-top: 14px;
  padding: 10px 13px;
  border-radius: var(--radius-sm);
  font-size: 12.8px;
  line-height: 1.6;
  word-break: break-word;
}
.probe-result.ok { background: rgba(52,211,153,.1); border: 1px solid rgba(52,211,153,.3); color: var(--ok); }
.probe-result.bad { background: rgba(248,113,113,.1); border: 1px solid rgba(248,113,113,.3); color: var(--err); }

.cfg-current { margin-top: 20px; }
.cfg-current .cur-row {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 9px 0;
  border-top: 1px solid var(--border-soft);
  font-size: 13px;
}
.cfg-current .cur-row span { color: var(--text-3); flex: 0 0 auto; }
.cfg-current .cur-row b { font-weight: 500; text-align: right; word-break: break-all; }

.stat-list { border: 1px solid var(--border-soft); border-radius: var(--radius-sm); overflow: hidden; }
.stat-row {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 10px 13px;
  font-size: 13px;
  border-bottom: 1px solid var(--border-soft);
}
.stat-row:last-child { border-bottom: 0; }
.stat-row span { color: var(--text-3); }
.stat-row b { font-weight: 500; font-family: var(--mono); font-size: 12.2px; }

.sec-title { margin: 22px 0 10px; font-size: 13px; color: var(--text-3); font-weight: 600; letter-spacing: .3px; }

.cap-list { display: flex; flex-direction: column; gap: 6px; }
.cap-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  background: var(--panel-2);
  border: 1px solid var(--border-soft);
  font-size: 13px;
}
.cap-row .nm { display: flex; align-items: center; gap: 8px; }
.cap-row .st {
  font-size: 11px; padding: 2px 7px; border-radius: 5px;
  background: var(--panel); color: var(--text-3);
}
.cap-row .st.on { background: rgba(52,211,153,.14); color: var(--ok); }
.cap-row .st.off { background: rgba(148,163,184,.14); color: var(--text-3); }
.cap-row .st.warn { background: rgba(251,191,36,.14); color: var(--warn); }
.cap-row .st.idle { background: rgba(124,140,255,.14); color: var(--accent); }
.cap-row.mod { flex-wrap: nowrap; }
.cap-row .nm { flex-direction: column; align-items: flex-start; gap: 2px; min-width: 0; }
.cap-desc { font-size: 11px; font-style: normal; color: var(--text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
.sec-hint { margin-left: 8px; font-weight: 400; font-size: 11px; color: var(--text-3); opacity: .8; }
.cap-note { font-size: 11.5px; color: var(--text-3); padding: 6px 2px 0; }

/* 能力开关 */
.switch {
  flex: 0 0 auto; position: relative; width: 40px; height: 22px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--panel); cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}
.switch b {
  position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--text-3); transition: transform .18s var(--ease), background .18s var(--ease);
}
.switch.on { background: var(--accent-soft); border-color: var(--accent); }
.switch.on b { transform: translateX(18px); background: var(--accent); }

/* 模块操作按钮 */
.mini-btn {
  flex: 0 0 auto; font-size: 11.5px; padding: 4px 10px; border-radius: 7px; cursor: pointer;
  border: 1px solid var(--accent); background: var(--accent-soft); color: var(--accent);
  font-family: inherit; transition: opacity .15s var(--ease);
}
.mini-btn:hover { opacity: .82; }
.mini-btn.ghost { border-color: var(--border); background: transparent; color: var(--text-2); }
.mini-btn[disabled] { opacity: .4; cursor: not-allowed; }

.mod-pending {
  font-size: 12px; color: var(--warn); background: rgba(251,191,36,.1);
  border: 1px solid rgba(251,191,36,.28); border-radius: var(--radius-sm);
  padding: 8px 11px; margin-bottom: 8px;
}

.loading-line { font-size: 12.5px; color: var(--text-3); padding: 6px 2px; }

/* Toast */
.toast {
  position: fixed;
  left: 50%; bottom: 34px; transform: translateX(-50%);
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  font-size: 13px;
  z-index: 90;
  animation: toast-in .25s var(--ease);
  max-width: 86vw;
  text-align: center;
}
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 8px); } }

/* ═══════════ 响应式 ═══════════ */
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); box-shadow: var(--shadow); }
  body.sb-open .sidebar { transform: none; }
  body.sb-open .scrim { opacity: 1; pointer-events: auto; }
  .sb-close, .sb-open { display: grid; }
  .topbar-actions .icon-btn { width: 36px; height: 36px; }
  .main { margin-left: 0; }
  .thread-inner { padding: 18px 14px 6px; gap: 15px; }
  .composer-wrap { padding: 6px 12px calc(28px + env(safe-area-inset-bottom)); }
  .welcome h1 { font-size: 23px; }
  .welcome-sub { font-size: 13px; margin-bottom: 20px; }
  .mode-grid { gap: 9px; }
  .mode-card { padding: 13px 13px 12px; }
  .mode-card b { font-size: 13.8px; }
  .mode-card i { font-size: 11.8px; }
  .msg.user .bubble { max-width: 88%; }
}

@media (max-width: 420px) {
  .mode-grid { grid-template-columns: 1fr; }
  .mode-card { flex-direction: row; align-items: center; gap: 11px; padding: 12px; }
  .mode-ic { margin-bottom: 0; }
  .mode-card i { display: none; }
  .drawer { width: 100%; max-width: 100%; }
  .composer-note { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ============ 登录 / 注册 ============ */
.auth-gate {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(900px 480px at 50% -8%, var(--accent-soft), transparent 72%),
    var(--bg);
}

.auth-card {
  width: 100%;
  max-width: 382px;
  padding: 28px 26px 22px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.auth-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; }
.auth-brand .brand-text b { display: block; font-size: 15px; line-height: 1.2; }
.auth-brand .brand-text i {
  display: block;
  font-style: normal;
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-3);
}

.auth-card h1 { margin: 0 0 6px; font-size: 19px; letter-spacing: -.2px; }
.auth-sub { margin: 0 0 20px; font-size: 12.6px; line-height: 1.6; color: var(--text-3); }

.auth-field { display: block; margin-bottom: 13px; }
.auth-field > span { display: block; margin-bottom: 6px; font-size: 12px; color: var(--text-2); }
.auth-field input {
  width: 100%;
  height: 42px;
  padding: 0 13px;
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 11px;
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color .16s, box-shadow .16s;
}
.auth-field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.auth-err {
  margin-bottom: 12px;
  padding: 9px 11px;
  font-size: 12.4px;
  line-height: 1.5;
  color: var(--err);
  background: rgba(220, 60, 60, .10);
  border: 1px solid rgba(220, 60, 60, .28);
  border-radius: 10px;
}

.auth-submit {
  width: 100%;
  height: 44px;
  margin-top: 4px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 600;
  transition: opacity .16s, transform .12s;
}
.auth-submit:active { transform: translateY(1px); }
.auth-submit:disabled { opacity: .6; cursor: default; }

.auth-switch { margin-top: 16px; text-align: center; font-size: 12.8px; color: var(--text-3); }
.auth-switch button {
  padding: 0 2px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--accent);
  font-family: inherit;
  font-size: 12.8px;
  font-weight: 600;
}

.auth-foot { margin-top: 18px; font-size: 11.6px; color: var(--text-3); }

/* 未登录时不响应主界面交互 */
body.auth-locked { overflow: hidden; }
body.auth-locked .sidebar,
body.auth-locked .main { pointer-events: none; }

/* ============ 侧栏账号区 ============ */
.sb-user {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 4px;
  padding: 8px 9px;
  background: var(--panel-2);
  border: 1px solid var(--border-soft);
  border-radius: 11px;
}
.sb-user-avatar {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}
.sb-user-meta { flex: 1; min-width: 0; }
.sb-user-meta b {
  display: block;
  font-size: 12.8px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sb-user-meta i { display: block; font-style: normal; font-size: 10.8px; color: var(--text-3); }
.sb-user .icon-btn { flex: 0 0 28px; width: 28px; height: 28px; }

@media (max-width: 420px) {
  .auth-card { padding: 22px 18px 18px; }
}

/* ============ 数学公式（KaTeX） ============ */
.math-block {
  margin: 12px 0;
  padding: 6px 2px;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}
.math-block .katex-display { margin: 0; text-align: left; }
.katex { font-size: 1.06em; }
.msgs .katex-display { overflow-x: auto; overflow-y: hidden; padding: 2px 0; }
.math-fallback {
  font-family: var(--mono);
  font-size: .96em;
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: 5px;
  padding: 1px 6px;
  white-space: nowrap;
}

/* ============ 附件上传 ============ */
.attach-btn { flex: 0 0 auto; width: 30px; height: 30px; border-radius: 9px; }
.attach-btn svg { width: 17px; height: 17px; stroke-width: 1.7; }
.attach-chips {
  display: flex; flex-wrap: wrap; gap: 6px;
  padding: 2px 0 7px;
}
.att-chip {
  display: inline-flex; align-items: center; gap: 6px;
  max-width: 240px;
  padding: 4px 5px 4px 9px;
  border-radius: 8px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-2);
}
.att-chip b {
  font-weight: 500; color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.att-chip i { font-style: normal; font-size: 11px; color: var(--text-3); flex: 0 0 auto; }
.att-chip button {
  width: 17px; height: 17px; border-radius: 5px;
  color: var(--text-3); font-size: 14px; line-height: 1;
  display: grid; place-items: center; flex: 0 0 auto;
}
.att-chip button:hover { background: rgba(248,113,113,.16); color: var(--err); }

.msg-atts { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 7px; }
.msg-att {
  font-size: 11.5px; color: var(--text-2);
  background: var(--panel-2); border: 1px solid var(--border-soft);
  padding: 3px 8px; border-radius: 7px;
}

/* ============ 深度研究参数 ============ */
.research-opts {
  display: flex; flex-wrap: wrap; gap: 10px;
  padding: 2px 0 6px;
  font-size: 12px; color: var(--text-3);
}
.research-opts label { display: inline-flex; align-items: center; gap: 5px; }
.research-opts select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-2);
  font-size: 12px;
  padding: 4px 7px;
  font-family: inherit;
}
.research-opts select:focus { outline: none; border-color: var(--accent); }

/* 研究大纲确认卡 */
.outline-box {
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  overflow: hidden;
}
.ob-head {
  display: flex; align-items: baseline; gap: 8px;
  padding: 11px 13px 8px;
  font-size: 13.5px; font-weight: 600; color: var(--text);
}
.ob-head span { font-size: 11.5px; font-weight: 400; color: var(--text-3); }
.ob-list { padding: 0 8px 4px; max-height: 340px; overflow-y: auto; }
.ob-item {
  display: flex; gap: 9px; align-items: flex-start;
  padding: 8px 6px; border-radius: 8px;
  cursor: pointer;
}
.ob-item:hover { background: var(--panel-2); }
.ob-item input { margin-top: 3px; accent-color: var(--accent); flex: 0 0 auto; }
.ob-txt { display: flex; flex-direction: column; gap: 2px; }
.ob-txt b { font-size: 13px; font-weight: 500; color: var(--text); }
.ob-txt i { font-style: normal; font-size: 12px; color: var(--text-3); line-height: 1.5; }
.ob-foot {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 13px 12px;
}
.ob-go {
  padding: 7px 16px; border-radius: 9px;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  color: #fff; font-size: 12.8px; font-weight: 500;
}
.ob-go:disabled { opacity: .55; }
.ob-tip { font-size: 11.5px; color: var(--text-3); }

/* ============ 额度 ============ */
.quota-item .badge { margin-left: auto; }
.badge.err { background: rgba(248,113,113,.16); color: var(--err); }

/* ============ 弹窗 ============ */
.modal-mask {
  position: fixed; inset: 0; z-index: 120;
  display: grid; place-items: center;
  background: rgba(6, 9, 14, .62);
  backdrop-filter: blur(3px);
  padding: 20px;
}
.modal-card {
  width: 100%; max-width: 360px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 22px 20px 18px;
  text-align: center;
}
.modal-ic { font-size: 30px; line-height: 1; margin-bottom: 10px; }
.modal-card h3 { font-size: 16px; color: var(--text); margin-bottom: 8px; }
.modal-card p { font-size: 13px; color: var(--text-2); line-height: 1.65; margin-bottom: 16px; }
.buy-plan {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px; margin-bottom: 14px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  font-size: 13px; color: var(--text-2);
}
.buy-plan em {
  font-style: normal; font-size: 11px;
  padding: 2px 7px; border-radius: 6px;
  background: rgba(251,191,36,.14); color: var(--warn);
}

/* ============ 找回密码 ============ */
.reset-head { font-size: 13px; color: var(--text-2); margin-bottom: 12px; }
.reset-code-row { display: flex; align-items: flex-end; gap: 8px; }
.reset-send {
  flex: 0 0 auto;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 12.5px;
  white-space: nowrap;
}
.reset-send:disabled { opacity: .55; cursor: not-allowed; }
.auth-back {
  display: block; width: 100%; margin-top: 10px;
  font-size: 12.5px; color: var(--text-3);
}
.auth-back:hover { color: var(--text-2); }
#authForgotBtn {
  font-size: 12.5px;
  color: var(--text-3);
}
#authForgotBtn:hover { color: var(--accent); }
.auth-switch {
  margin-top: 16px;
  display: flex; align-items: center; justify-content: center;
  gap: 6px; flex-wrap: wrap;
}

/* ============ v9：模型下拉 ============ */
.model-pill {
  display: inline-flex; align-items: center; gap: 6px;
  max-width: 210px; padding: 5px 10px;
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--panel-2); color: var(--text-2);
  font-size: 12.5px; cursor: pointer;
  transition: border-color .15s, color .15s;
}
.model-pill:hover { border-color: var(--accent); color: var(--text); }
.model-pill svg { width: 14px; height: 14px; flex: none; }
.model-pill svg.caret { width: 12px; height: 12px; opacity: .7; }
.model-pill span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.model-menu {
  position: absolute; left: 0; bottom: calc(100% + 8px); top: auto; z-index: 60;
  width: 300px; max-height: min(420px, 60vh); overflow: auto;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; box-shadow: var(--shadow); padding: 6px;
}
.mm-group {
  padding: 8px 10px 4px; font-size: 11px; color: var(--text-3);
  letter-spacing: .05em;
}
.mm-item {
  display: flex; align-items: center; gap: 8px; width: 100%;
  padding: 8px 10px; border: 0; border-radius: 8px;
  background: transparent; color: var(--text);
  font-size: 13px; cursor: pointer; text-align: left;
}
.mm-item:hover { background: var(--accent-soft); }
.mm-item span { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mm-item.on { color: var(--accent); }
.mm-eff {
  font-style: normal; font-size: 10.5px; color: var(--text-3);
  border: 1px solid var(--border); border-radius: 6px; padding: 1px 5px;
}
.mm-check { font-style: normal; color: var(--accent); }
.mm-reset {
  width: 100%; margin-top: 4px; padding: 8px; border: 0;
  background: transparent; color: var(--text-3); font-size: 12px; cursor: pointer;
}
.mm-reset:hover { color: var(--err); }
.composer-mode { position: relative; }

/* ============ v9：侧栏功能导航 ============ */
.feat-nav {
  padding: 6px 10px 10px; border-top: 1px solid var(--border-soft);
  /* 窗口高度不足时自身滚动，保证底部「今日额度 / 设置」始终可见 */
  flex-shrink: 1; min-height: 0; overflow-y: auto; scrollbar-width: thin;
}
.feat-nav-title {
  padding: 10px 8px 6px; font-size: 11px; letter-spacing: .08em;
  color: var(--text-3);
}
.feat-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 8px 10px; border: 0; border-radius: 10px;
  background: transparent; color: var(--text-2);
  font-size: 13.5px; cursor: pointer; text-align: left;
  transition: background .15s, color .15s;
}
.feat-item:hover { background: var(--accent-soft); color: var(--text); }
.feat-item svg { width: 17px; height: 17px; flex: none; opacity: .85; }

/* ============ v9：全屏功能视图 ============ */
.feat-view {
  position: fixed; inset: 0; z-index: 80;
  left: var(--sidebar-w);
  display: flex; flex-direction: column;
  background: var(--bg);
}
.feat-head {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 20px; border-bottom: 1px solid var(--border-soft);
  background: var(--panel);
}
.feat-head h2 { font-size: 17px; margin: 0; }
.feat-sub { font-size: 12.5px; color: var(--text-3); }
.feat-body {
  flex: 1; overflow: auto; padding: 20px;
  display: flex; flex-direction: column; gap: 16px;
}
.feat-loading, .feat-empty {
  margin: auto; text-align: center; color: var(--text-3); font-size: 13.5px;
  display: flex; flex-direction: column; gap: 8px;
}
.feat-empty b { font-size: 15px; color: var(--text-2); }
.feat-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px; max-width: 980px; width: 100%; margin: 0 auto;
}
.feat-card {
  background: var(--panel); border: 1px solid var(--border-soft);
  border-radius: var(--radius); padding: 14px 16px;
}
.feat-card.wide { grid-column: 1 / -1; max-width: 980px; margin: 0 auto; width: 100%; }
.fc-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 8px;
}
.fc-head b { font-size: 14.5px; }
.fc-head em { font-style: normal; font-size: 12px; color: var(--text-3); }
.fc-head em.ok { color: var(--ok); }
.fc-row {
  display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
  padding: 7px 0; border-top: 1px dashed var(--border-soft);
  font-size: 13px; color: var(--text);
}
.fc-row:first-of-type { border-top: 0; }
.fc-row span { overflow: hidden; text-overflow: ellipsis; }
.fc-row em { font-style: normal; font-size: 12px; color: var(--text-3); flex: none; }
.fc-row.dim, .fc-row i.cap-desc { color: var(--text-3); }
.fc-row i.cap-desc { font-style: normal; font-size: 12px; margin-left: 8px; }
/* 继续学习列表：标题一行 + 摘要一行，字号统一 */
.fc-row.study-recent { align-items: flex-start; }
.fc-row.study-recent span { display: block; min-width: 0; flex: 1; }
.fc-row.study-recent b {
  display: block; font-size: 13.5px; font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.fc-row.study-recent i.cap-desc {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  margin: 3px 0 0; font-size: 12px; line-height: 1.45;
  white-space: normal; overflow: hidden;
}
.feat-cta {
  max-width: 980px; width: 100%; margin: 0 auto;
  padding: 12px 16px; border-radius: var(--radius);
  background: var(--accent-soft); color: var(--text-2); font-size: 13px;
}
.feat-note {
  max-width: 980px; width: 100%; margin: 0 auto;
  padding: 12px 16px; border-radius: var(--radius);
  border: 1px solid rgba(251, 191, 36, .35);
  color: var(--warn); font-size: 12.5px;
}

/* ============ v9：任务看板 ============ */
.board-wrap {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
  max-width: 1080px; width: 100%; margin: 0 auto;
  align-items: start;
}
.board-col {
  background: var(--panel-2); border: 1px solid var(--border-soft);
  border-radius: var(--radius); padding: 10px;
}
.bc-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 6px 10px; font-size: 13.5px; font-weight: 600;
  border-top: 3px solid #888; margin-top: -3px;
}
.bc-head em { font-style: normal; font-size: 12px; color: var(--text-3); }
.bc-cards { display: flex; flex-direction: column; gap: 8px; min-height: 40px; }
.board-card {
  background: var(--panel); border: 1px solid var(--border-soft);
  border-radius: 10px; padding: 10px 12px; font-size: 13px;
}
.board-card b { display: block; font-size: 13.5px; }
.board-card i { display: block; font-style: normal; color: var(--text-3); font-size: 12px; margin-top: 3px; }
.board-card u { display: block; text-decoration: none; color: var(--warn); font-size: 11.5px; margin-top: 3px; }
.bcc-acts { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.bc-add { display: flex; gap: 6px; margin-top: 8px; }
.bc-add input {
  flex: 1; min-width: 0; padding: 7px 10px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-soft); color: var(--text); font-size: 12.5px;
}
.bc-add button {
  width: 34px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel); color: var(--text-2); cursor: pointer;
}
.bc-add button:hover { color: var(--accent); border-color: var(--accent); }

/* ============ v9：移动端适配 ============ */
@media (max-width: 900px) {
  .feat-view { left: 0; }
  .feat-head { padding: 12px 14px; }
  .feat-body { padding: 14px; }
  .feat-grid { grid-template-columns: 1fr; }
  .board-wrap { grid-template-columns: 1fr; }
  .model-pill { max-width: 150px; }
  .model-menu { width: min(300px, calc(100vw - 40px)); }
  .feat-nav { padding-bottom: 14px; }
}

/* ============ v11：参考资料 HTML 块 ============ */
.md details {
  margin: 14px 0;
  border: 1px solid var(--border-soft); border-radius: 10px;
  background: var(--panel-2);
  overflow: hidden;
}
.md summary {
  cursor: pointer; padding: 10px 14px;
  font-weight: 600; font-size: 13.5px; color: var(--text);
  background: var(--panel);
  user-select: none; list-style: revert;
}
.md summary:hover { color: var(--accent); }
.md details > *:not(summary) { padding-left: 14px; padding-right: 14px; }
.md details ol, .md details ul { margin: 10px 0; padding-left: 1.8em; }
.md details li { margin: 7px 0; font-size: 13px; color: var(--text-2); line-height: 1.75; }
.md details a { color: var(--accent); text-decoration: none; word-break: break-all; }
.md details a:hover { text-decoration: underline; }

/* ============ v12：引用角标 ============ */
.md sup.cite-mark { font-size: 10.5px; line-height: 1; margin: 0 1px; vertical-align: super; }
.md sup.cite-mark a { color: var(--accent); text-decoration: none; }
.md sup.cite-mark a:hover { text-decoration: underline; }

/* ============ v13：可视化渲染 ============ */
.viz-wrap { margin: 12px 0; }
.viz-frame {
  display: block; width: 100%; height: 380px;
  border: 1px solid var(--border-soft); border-radius: 10px;
  background: #fff;
}
.viz-note { margin-top: 5px; font-size: 11.5px; color: var(--text-3); }

/* ============ v13：可视化渲染 ============ */
.viz-wrap { margin: 12px 0; }
.viz-frame {
  display: block; width: 100%; height: 380px;
  border: 1px solid var(--border-soft); border-radius: 10px;
  background: #fff;
}
.viz-note { margin-top: 5px; font-size: 11.5px; color: var(--text-3); }

/* ============ v13：学习伙伴 ============ */
.partner-persona {
  display: block; font-size: 12.5px; line-height: 1.6; color: var(--text-3);
  max-height: 4.2em; overflow: hidden;
}
.partner-acts { display: flex; gap: 8px; margin-top: 10px; }
.partner-form { display: flex; flex-direction: column; gap: 8px; }
.pf-row { display: flex; gap: 8px; }
.pf-row input {
  flex: 1; min-width: 0; padding: 7px 10px; font-size: 13px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel-2); color: var(--text);
}
.pf-row .pf-emoji { flex: 0 0 56px; text-align: center; }
.partner-form textarea {
  width: 100%; padding: 8px 10px; font-size: 13px; resize: vertical;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel-2); color: var(--text); font-family: inherit;
}
.pf-acts { display: flex; justify-content: flex-end; }

.chat-pane {
  display: flex; flex-direction: column; gap: 10px;
  max-width: 820px; width: 100%; margin: 0 auto; flex: 1; min-height: 0;
}
.chat-list {
  flex: 1; min-height: 240px; max-height: calc(100vh - 320px); overflow: auto;
  display: flex; flex-direction: column; gap: 10px;
  padding: 14px; border: 1px solid var(--border-soft); border-radius: 12px;
  background: var(--panel);
}
.chat-row { display: flex; }
.chat-row.me { justify-content: flex-end; }
.chat-bubble {
  max-width: 78%; padding: 9px 13px; border-radius: 12px;
  font-size: 14px; line-height: 1.7; word-break: break-word;
  background: var(--panel-2); border: 1px solid var(--border-soft);
}
.chat-row.me .chat-bubble {
  background: var(--accent-soft); border-color: transparent; color: var(--text);
}
.chat-bubble.typing { color: var(--text-3); font-size: 13px; display: flex; align-items: center; gap: 7px; }
.chat-bubble.err { color: var(--err); }
.chat-bubble.md > *:first-child { margin-top: 0; }
.chat-bubble.md > *:last-child { margin-bottom: 0; }
.chat-input { display: flex; gap: 8px; align-items: flex-end; }
.chat-input textarea {
  flex: 1; padding: 9px 12px; font-size: 14px; resize: none; font-family: inherit;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--panel-2); color: var(--text);
}
@media (max-width: 900px) {
  .pf-row { flex-wrap: wrap; }
  .chat-list { max-height: calc(100vh - 300px); }
  .chat-bubble { max-width: 88%; }
}

/* ============ v14：设置抽屉层级 / 学习 / 空间 / 看板 / 钱包 / 后台 ============ */
.drawer, .drawer-mask { z-index: 95; }

.study-hero { background: linear-gradient(135deg, var(--panel-2), var(--panel)); }
.study-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
  margin-top: 10px; text-align: center;
}
.study-stats b { display: block; font-size: 20px; font-weight: 700; color: var(--text); }
.study-stats i { display: block; margin-top: 3px; font-size: 11.5px; font-style: normal; color: var(--text-3); }
.study-recent { cursor: pointer; border-radius: 8px; transition: background .15s; }
.study-recent:hover { background: var(--panel-2); }

.plan-card { text-align: center; }
.plan-price { font-size: 26px; font-weight: 750; color: var(--accent); margin: 8px 0 4px; }
.plan-card .mini-btn { margin-top: 10px; width: 100%; }

.board-toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.board-card { cursor: grab; }
.board-card.dragging { opacity: .45; }
.bc-cards.drag-over { outline: 2px dashed var(--accent); outline-offset: 2px; border-radius: 10px; }
.board-card u.overdue { color: var(--err, #e5484d); font-weight: 600; }
.bc-add input, .pf-status, .admin-inline input, .admin-inline select {
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel-2); color: var(--text);
  padding: 7px 10px; font-size: 13px; min-width: 0;
}
.bc-add input { flex: 1; }

.admin-tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border-soft); margin: 14px 0 12px; overflow-x: auto; }
.admin-tabs .dt-tab { white-space: nowrap; }

.admin-table-wrap { overflow-x: auto; border: 1px solid var(--border-soft); border-radius: 12px; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.admin-table th {
  text-align: left; padding: 10px 12px; font-size: 12px; color: var(--text-3);
  border-bottom: 1px solid var(--border-soft); white-space: nowrap; font-weight: 550;
}
.admin-table td { padding: 10px 12px; border-bottom: 1px solid var(--border-soft); vertical-align: top; }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table .bcc-acts { display: flex; gap: 6px; flex-wrap: wrap; }
@media (max-width: 900px) {
  .admin-table { min-width: 680px; }
  .admin-table-wrap { -webkit-overflow-scrolling: touch; }
}

.nb-card { cursor: pointer; transition: transform .15s, border-color .15s; }
.nb-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.dim { color: var(--text-3); }

@media (max-width: 900px) {
  .study-stats { grid-template-columns: repeat(2, 1fr); }
  .board-wrap { grid-template-columns: 1fr; }
  .admin-table { font-size: 12px; }
}

/* ============ v15：思考与调用合并 / 图表渲染 ============ */
.fold.activity .fold-t { color: var(--text-2); }
.act-stat { flex: 0 0 auto; font-style: normal; font-size: 11.5px; color: var(--text-3); }
.act-body {
  font-family: inherit; white-space: normal;
  padding-top: 2px; max-height: 420px;
}
.act-think {
  margin: 6px 0; padding: 2px 0 2px 10px;
  border-left: 2px solid var(--border-soft);
  font-size: 12.6px; line-height: 1.72; color: var(--text-3);
  white-space: pre-wrap; word-break: break-word;
}
.act-row { border-top: 1px dashed var(--border-soft); }
.act-row:first-child { border-top: none; }
.act-row-h {
  display: flex; align-items: center; gap: 7px; width: 100%;
  padding: 7px 0; font-size: 12.4px; color: var(--text-2); text-align: left;
}
.act-dot { flex: 0 0 auto; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); opacity: .7; }
.act-row.done .act-dot { background: #2da44e; opacity: 1; }
.act-name { flex: 0 0 auto; font-weight: 600; color: var(--text); }
.act-brief {
  flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-family: var(--mono); font-size: 11.6px; color: var(--text-3);
}
.act-ic { flex: 0 0 auto; display: flex; align-items: center; }
.act-row-b {
  display: none; margin: 0 0 8px; padding: 8px 10px;
  background: var(--panel-2); border-radius: 8px;
  font-family: var(--mono); font-size: 11.6px; line-height: 1.6; color: var(--text-3);
  white-space: pre-wrap; word-break: break-word; max-height: 220px; overflow: auto;
}
.act-row.open .act-row-b { display: block; }

.dt-chart {
  margin: 14px 0; padding: 12px;
  border: 1px solid var(--border-soft); border-radius: 12px; background: var(--panel);
}
.dt-chart-box { position: relative; width: 100%; height: 320px; }
.dt-chart-box canvas { display: block; }
.dt-chart.fallback .dt-chart-box { height: auto; }
.dt-chart-tb { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.dt-chart-tb th, .dt-chart-tb td { padding: 6px 9px; border-bottom: 1px solid var(--border-soft); text-align: right; }
.dt-chart-tb th { font-size: 11.5px; color: var(--text-3); font-weight: 550; }
.dt-chart-tb th:first-child, .dt-chart-tb td:first-child { text-align: left; color: var(--text-3); }
.md details.dt-chart-raw { margin: 8px 0 0; border: none; background: none; }
.md details.dt-chart-raw > summary {
  padding: 0; background: none; font-weight: 500;
  font-size: 11.5px; color: var(--text-3);
}
.md details.dt-chart-raw pre {
  margin: 8px 0 0; padding: 9px 11px; max-height: 240px; overflow: auto;
  background: var(--panel-2); border-radius: 8px;
  font-family: var(--mono); font-size: 11.5px; color: var(--text-3);
  white-space: pre-wrap; word-break: break-word;
}
@media (max-width: 900px) {
  .dt-chart { padding: 9px; }
  .dt-chart-box { height: 260px; }
  .act-brief { display: none; }
}

/* 后台网址行 */
.admin-url { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.admin-url code {
  font-family: var(--mono); font-size: 12px; color: var(--text-2);
  background: var(--panel-2); padding: 2px 7px; border-radius: 6px;
}

/* ============ 对话页「回到首页」箭头 ============ */
.back-home { color: var(--text-2); }
.back-home:hover { color: var(--text); background: var(--panel-2); }

/* ============ 学习资料库 ============ */
.lib-wrap {
  max-width: 980px; width: 100%; margin: 0 auto;
  display: flex; flex-direction: column; gap: 10px;
}
.lib-tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.lib-tab {
  font-family: inherit; font-size: 12.5px; padding: 6px 12px;
  border-radius: 999px; border: 1px solid var(--border);
  background: var(--panel); color: var(--text-2); cursor: pointer;
  transition: all .15s var(--ease);
}
.lib-tab b { font-weight: 600; color: var(--text-3); margin-left: 1px; }
.lib-tab:hover { border-color: var(--accent); color: var(--accent); }
.lib-tab.on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.lib-tab.on b { color: var(--accent); }
.lib-toolbar { display: flex; gap: 8px; align-items: center; }
.lib-search {
  flex: 1; min-width: 0; font-family: inherit; font-size: 13px;
  padding: 8px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
}
.lib-search:focus { outline: none; border-color: var(--accent); }
.lib-search::placeholder { color: var(--text-3); }
.lib-sum { font-size: 12px; color: var(--text-3); padding: 0 2px; }
.lib-list { display: flex; flex-direction: column; gap: 8px; }
.lib-row {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 12px 14px; background: var(--panel);
  border: 1px solid var(--border-soft); border-radius: var(--radius);
}
.lib-row:hover { border-color: var(--border); }
.lib-ico { flex: 0 0 auto; width: 26px; text-align: center; font-size: 19px; line-height: 1.3; }
.lib-body { flex: 1; min-width: 0; }
.lib-title { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.lib-title b { font-size: 14px; font-weight: 600; color: var(--text); }
.lib-badge {
  font-size: 10.5px; padding: 1px 7px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--text-3); white-space: nowrap;
}
.lib-badge.doing { color: var(--warn); border-color: rgba(251,191,36,.4); background: rgba(251,191,36,.10); }
.lib-badge.done { color: var(--ok); border-color: rgba(52,211,153,.4); background: rgba(52,211,153,.10); }
.lib-meta {
  font-size: 12px; color: var(--text-3); margin-top: 3px; line-height: 1.5;
  overflow: hidden; text-overflow: ellipsis;
}
.lib-link { color: var(--accent); text-decoration: none; margin-left: 4px; }
.lib-link:hover { text-decoration: underline; }
.lib-prog { display: flex; align-items: center; gap: 8px; margin-top: 7px; }
.lib-bar { flex: 1; height: 5px; border-radius: 999px; background: var(--bg-soft); overflow: hidden; }
.lib-bar i {
  display: block; height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .3s var(--ease);
}
.lib-prog em { font-style: normal; font-size: 11.5px; color: var(--text-3); white-space: nowrap; }
.lib-note { font-size: 12px; color: var(--text-2); margin-top: 6px; line-height: 1.55; }
.lib-acts { display: flex; flex-direction: column; gap: 5px; flex: 0 0 auto; }
.lib-card { max-width: 460px; }
.lib-entry .link-btn { margin-top: 0; }
.lib-mini { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.lib-mini-cell {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 10px 4px; border-radius: var(--radius-sm); cursor: pointer;
  border: 1px solid var(--border-soft); background: var(--panel-2);
  font-family: inherit; transition: all .15s var(--ease);
}
.lib-mini-cell:hover { border-color: var(--accent); transform: translateY(-1px); }
.lib-mini-cell i { font-style: normal; font-size: 17px; line-height: 1.2; }
.lib-mini-cell b { font-size: 16px; color: var(--text); }
.lib-mini-cell span { font-size: 11.5px; color: var(--text-3); }
@media (max-width: 640px) {
  .lib-row { flex-wrap: wrap; }
  .lib-acts { flex-direction: row; flex-wrap: wrap; width: 100%; }
  .lib-card { max-width: 100%; }
}
@media (max-width: 560px) {
  .lib-mini { grid-template-columns: repeat(3, 1fr); }
}

/* ============ 语音对话 ============ */
.mic-btn, .speak-btn { color: var(--text-2); transition: all .15s var(--ease); }
.mic-btn:hover, .speak-btn:hover { color: var(--text); background: var(--panel-2); }
.mic-btn.warn { color: var(--warn); }
.speak-btn.on { color: var(--accent); background: var(--accent-soft); }
.mic-btn.rec {
  color: #fff; background: #ef4444; border-color: #ef4444;
  animation: mic-pulse 1.4s infinite;
}
.mic-btn.busy { color: var(--accent); opacity: .75; }
@keyframes mic-pulse {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, .55); }
  70% { box-shadow: 0 0 0 9px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}
.mic-timer {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11.5px; color: #ef4444; font-variant-numeric: tabular-nums;
}
.mic-timer i {
  width: 7px; height: 7px; border-radius: 50%; background: #ef4444;
  animation: mic-blink 1s steps(2, end) infinite;
}
.mic-timer em { font-style: normal; }
@keyframes mic-blink { 50% { opacity: .2; } }
@media (max-width: 560px) {
  .mic-timer em { font-size: 11px; }
}

/* ============ 后台：开卡 / 兑换码 / 语音 ============ */
.grant-card { max-width: 440px; }
.code-cell { font-family: var(--mono); font-size: 12.5px; letter-spacing: .3px; }
.lib-badge.used { color: var(--text-3); border-color: var(--border); background: var(--bg-soft); }
.lib-badge.expired { color: var(--err); border-color: rgba(248,113,113,.4); background: rgba(248,113,113,.10); }
.lib-badge.disabled { color: var(--warn); border-color: rgba(251,191,36,.4); background: rgba(251,191,36,.10); }
.admin-tabs { flex-wrap: wrap; }
.vx-quick { display: flex; flex-wrap: wrap; gap: 6px; margin: 2px 0 10px; }
.vx-quick button {
  font-family: inherit; font-size: 12px; padding: 5px 10px;
  border-radius: 999px; cursor: pointer;
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text-2);
  transition: all .15s var(--ease);
}
.vx-quick button:hover { border-color: var(--accent); color: var(--accent); }

/* 环境不支持（32 位服务器装不了的模块）的禁用按钮 */
.mini-btn.disabled {
  opacity: .5; cursor: not-allowed;
  color: var(--text-3); border-color: var(--border-soft); background: var(--bg-soft);
}

/* ============ 钱包：付款凭证上传弹窗 ============ */
.claim-file-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 4px 0 2px; }
.claim-preview { margin: 8px 0 2px; }
.claim-preview img {
  max-width: 100%; max-height: 200px; border-radius: 10px;
  border: 1px solid var(--border-soft); display: block;
}

/* 站点概览：可点击跳转的统计卡 */
.study-stats .stat-link { cursor: pointer; border-radius: 10px; transition: background .15s var(--ease); }
.study-stats .stat-link:hover { background: var(--bg-soft); }
.mini-btn.disabled:hover { color: var(--text-3); border-color: var(--border-soft); }

/* ============ 知识库（自研）============ */
.kb-wrap, .wr-wrap { max-width: 1040px; width: 100%; margin: 0 auto; }
.kb-drop {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 16px; border-radius: var(--radius);
  border: 1px dashed var(--border); background: var(--panel-2);
  transition: all .15s var(--ease);
}
.kb-drop span { font-size: 12.5px; color: var(--text-3); }
.kb-drop.over { border-color: var(--accent); background: var(--accent-soft); }
.kb-status {
  margin-top: 10px; font-size: 12.5px; color: var(--text-2);
  padding: 8px 12px; border-radius: var(--radius-sm); background: var(--bg-soft);
}
.kb-status.busy { color: var(--accent); }
.kb-status.ok { color: var(--ok); }
.kb-status.warn { color: var(--warn); }
.kb-docs { display: flex; flex-direction: column; gap: 8px; }
.kb-doc {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-soft); background: var(--panel);
}
.kb-doc:hover { border-color: var(--border); }
.kb-doc-ic { flex: 0 0 auto; font-size: 16px; line-height: 1.4; }
.kb-doc-body { flex: 1; min-width: 0; }
.kb-doc-title { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.kb-doc-title b { font-size: 13.5px; font-weight: 600; color: var(--text); }
.kb-ask { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.kb-ask input {
  flex: 1; min-width: 180px; font-family: inherit; font-size: 13px;
  padding: 9px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
}
.kb-ask input:focus { outline: none; border-color: var(--accent); }
.kb-out { display: block; }
.kb-answer {
  font-size: 13.5px; line-height: 1.75; color: var(--text);
  padding: 12px 14px; border-radius: var(--radius-sm);
  background: var(--panel-2); border: 1px solid var(--border-soft);
}
.kb-answer p:first-child { margin-top: 0; }
.kb-answer p:last-child { margin-bottom: 0; }
.kb-elapsed { font-size: 11.5px; color: var(--text-3); margin-top: 6px; text-align: right; }
.kb-cites { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.kb-cites-head { font-size: 12px; color: var(--text-3); font-weight: 600; }
.kb-cite {
  padding: 9px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-soft); background: var(--panel);
  border-left: 3px solid var(--accent);
}
.kb-cite-head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.kb-cite-head b { font-size: 12.5px; color: var(--text); }
.kb-cite-head i { font-style: normal; font-size: 11px; color: var(--text-3); }
.kb-cite-text { font-size: 12.5px; color: var(--text-2); line-height: 1.65; margin-top: 4px; }
.kb-thinking {
  display: flex; align-items: center; gap: 8px;
  font-size: 12.5px; color: var(--text-3); padding: 10px 2px;
}
.kb-thinking i {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  animation: kb-pulse 1s infinite;
}
@keyframes kb-pulse { 50% { opacity: .25; transform: scale(.75); } }

/* ============ 协作写作（自研）============ */
.wr-wrap { display: flex; gap: 12px; align-items: flex-start; }
.wr-side {
  flex: 0 0 216px; display: flex; flex-direction: column; gap: 8px;
  position: sticky; top: 0;
}
.wr-new { width: 100%; }
.wr-list { display: flex; flex-direction: column; gap: 6px; max-height: 62vh; overflow-y: auto; }
.wr-item {
  display: flex; flex-direction: column; gap: 2px; text-align: left;
  padding: 9px 11px; border-radius: var(--radius-sm); cursor: pointer;
  border: 1px solid var(--border-soft); background: var(--panel);
  font-family: inherit; transition: all .15s var(--ease);
}
.wr-item:hover { border-color: var(--border); }
.wr-item.on { border-color: var(--accent); background: var(--accent-soft); }
.wr-item b {
  font-size: 13px; font-weight: 600; color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.wr-item i { font-style: normal; font-size: 11px; color: var(--text-3); }
.wr-empty { font-size: 12.5px; color: var(--text-3); padding: 10px 2px; }
.wr-main { flex: 1; min-width: 0; }
.wr-editor { display: flex; flex-direction: column; gap: 10px; }
.wr-title {
  font-family: inherit; font-size: 17px; font-weight: 600; color: var(--text);
  padding: 9px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel);
}
.wr-title:focus { outline: none; border-color: var(--accent); }
.wr-body {
  font-family: inherit; font-size: 14px; line-height: 1.85; color: var(--text);
  min-height: 42vh; resize: vertical; padding: 14px 16px;
  border-radius: var(--radius); border: 1px solid var(--border); background: var(--panel);
}
.wr-body:focus { outline: none; border-color: var(--accent); }
.wr-tools { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.wr-ins {
  flex: 1; min-width: 160px; font-family: inherit; font-size: 12.5px;
  padding: 7px 11px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel); color: var(--text);
}
.wr-ins:focus { outline: none; border-color: var(--accent); }
.wr-out { display: block; }
.wr-res-head {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px 12px; border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  background: var(--panel-2); border: 1px solid var(--border-soft); border-bottom: none;
}
.wr-res-head b { font-size: 12.5px; color: var(--text); }
.wr-res-head em { font-style: normal; font-size: 11.5px; color: var(--text-3); }
.wr-res-acts { margin-left: auto; display: flex; gap: 6px; flex-wrap: wrap; }
.wr-res-text {
  font-size: 13.5px; line-height: 1.8; color: var(--text);
  padding: 12px 14px; white-space: pre-wrap;
  border: 1px solid var(--border-soft); border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--panel); max-height: 46vh; overflow-y: auto;
}
.wr-blank { align-items: center; justify-content: center; min-height: 40vh; }

/* 模块页：站内自研的模块行 */
.cap-row.mod.builtin .st.on { background: var(--accent-soft); }
.cap-row.mod.builtin .nm { color: var(--text); }

@media (max-width: 760px) {
  .wr-wrap { flex-direction: column; }
  .wr-side { flex: none; width: 100%; position: static; }
  .wr-list { flex-direction: row; overflow-x: auto; max-height: none; }
  .wr-item { min-width: 140px; }
}

/* ============ 文档解析（四种自研引擎）============ */
.eng-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.eng-pill {
  display: flex; flex-direction: column; gap: 3px; text-align: left;
  padding: 10px 12px; border-radius: var(--radius-sm); cursor: pointer;
  border: 1px solid var(--border); background: var(--panel-2);
  font-family: inherit; transition: all .15s var(--ease);
}
.eng-pill b { font-size: 12.5px; color: var(--text); font-weight: 600; }
.eng-pill i { font-style: normal; font-size: 11px; color: var(--text-3); line-height: 1.45; }
.eng-pill:hover { border-color: var(--accent); transform: translateY(-1px); }
.eng-pill.on { border-color: var(--accent); background: var(--accent-soft); }
.eng-pill.on b { color: var(--accent); }
.parse-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.parse-file { font-size: 13px; color: var(--text-2); margin-right: auto; }
.parse-acts { display: flex; gap: 6px; flex-wrap: wrap; }
.parse-preview {
  max-height: 52vh; overflow-y: auto; padding: 14px 16px;
  border-radius: var(--radius-sm); border: 1px solid var(--border-soft);
  background: var(--panel-2); font-size: 13.5px; line-height: 1.8; color: var(--text);
}
.parse-preview h1, .parse-preview h2, .parse-preview h3 { color: var(--text); }

/* ============ 模型服务商 ============ */
.pv-now { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.pv-now-main { flex: 1; min-width: 200px; }
.pv-now-main b { font-size: 15px; color: var(--text); margin-right: 8px; }
.pv-now-model {
  display: flex; flex-direction: column; gap: 2px; align-items: flex-end;
  font-size: 11.5px; color: var(--text-3);
}
.pv-now-model b { font-size: 13px; color: var(--accent); font-family: var(--mono); }
.pv-list { display: flex; flex-direction: column; gap: 8px; }
.pv-row {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  padding: 10px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-soft); background: var(--panel);
}
.pv-row:hover { border-color: var(--border); }
.pv-row-main { flex: 1; min-width: 180px; }
.pv-row-main b { font-size: 13px; color: var(--text); margin-right: 8px; }
.pv-row-models { display: flex; gap: 4px; flex-wrap: wrap; max-width: 46%; }
.pv-tag {
  font-style: normal; font-size: 10.5px; padding: 1px 6px; border-radius: 4px;
  background: var(--bg-soft); color: var(--text-3); border: 1px solid var(--border-soft);
  font-family: var(--mono); white-space: nowrap;
}
.pv-tag.dim { opacity: .7; }
.pv-out {
  margin-top: 10px; padding: 10px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-soft); background: var(--panel-2);
  font-size: 12.5px; color: var(--text-2); line-height: 1.7;
}
.pv-out.ok { border-color: rgba(52,211,153,.4); }
.pv-out.warn { border-color: rgba(251,191,36,.4); }
.pv-out.err { border-color: rgba(248,113,113,.4); }
.pv-err { color: var(--err); font-size: 12px; margin-top: 4px; word-break: break-all; }
.pv-models { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 6px; }
.pv-svcs { display: flex; gap: 10px; flex-wrap: wrap; }
.pv-svc {
  flex: 1; min-width: 160px; display: flex; flex-direction: column; gap: 3px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-soft); background: var(--panel-2);
}
.pv-svc b { font-size: 12.5px; color: var(--text); }
.pv-svc span { font-size: 11.5px; color: var(--text-3); }

/* ============ 数学动画 / 视频课程 ============ */
.anim-stage {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  padding: 26px 18px; border-radius: var(--radius);
  background: radial-gradient(120% 120% at 50% 0%, var(--accent-soft), var(--panel-2) 70%);
  border: 1px solid var(--border-soft); text-align: center;
  animation: anim-fade .45s var(--ease);
}
@keyframes anim-fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.anim-cap { font-size: 11.5px; color: var(--text-3); letter-spacing: .4px; }
.anim-expr {
  font-family: var(--mono); font-size: 22px; line-height: 1.5; color: var(--accent);
  word-break: break-word; padding: 4px 0;
}
.anim-caption { font-size: 14.5px; color: var(--text); font-weight: 600; }
.anim-insight { font-size: 12.5px; color: var(--text-2); max-width: 520px; line-height: 1.7; }
.anim-dots { display: flex; gap: 6px; justify-content: center; margin: 12px 0 8px; }
.anim-dot {
  width: 8px; height: 8px; border-radius: 50%; cursor: pointer;
  background: var(--border); transition: all .2s var(--ease);
}
.anim-dot.on { background: var(--accent); width: 20px; border-radius: 999px; }
.anim-bar { height: 4px; border-radius: 999px; background: var(--bg-soft); overflow: hidden; margin-bottom: 12px; }
.anim-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .4s var(--ease); }
.anim-code { margin-top: 12px; font-size: 12.5px; color: var(--text-2); }
.anim-code summary { cursor: pointer; padding: 6px 0; color: var(--text-3); }
.anim-code pre {
  max-height: 240px; overflow: auto; padding: 10px 12px; margin: 6px 0;
  border-radius: var(--radius-sm); background: var(--bg-soft);
  font-family: var(--mono); font-size: 11.5px; line-height: 1.6; color: var(--text-2);
  white-space: pre;
}
.lesson-stage {
  padding: 26px 22px; border-radius: var(--radius); text-align: left;
  border: 1px solid var(--border-soft);
  background: radial-gradient(120% 120% at 0% 0%, var(--accent-soft), var(--panel-2) 70%);
  animation: anim-fade .45s var(--ease);
}
.lesson-head { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.lesson-points { margin: 0 0 12px; padding-left: 20px; color: var(--text-2); font-size: 13px; line-height: 1.9; }
.lesson-points li::marker { color: var(--accent); }
.lesson-narr { font-size: 13.5px; line-height: 1.85; color: var(--text); white-space: pre-wrap; }

@media (max-width: 760px) {
  .eng-row { grid-template-columns: repeat(2, 1fr); }
  .pv-row-models { max-width: 100%; }
  .anim-expr { font-size: 18px; }
  .lesson-head { font-size: 16px; }
}

/* ============ v24a：用户禁用 + 侧栏高度自适应 ============ */
.mini-btn.danger {
  background: rgba(239, 68, 68, .1);
  color: var(--danger, #ef4444);
  border-color: rgba(239, 68, 68, .25);
}
.mini-btn.danger:hover { background: rgba(239, 68, 68, .18); }
.ban-tag {
  font-style: normal; font-size: 10.5px; font-weight: 600;
  color: #ef4444; background: rgba(239, 68, 68, .1);
  border-radius: 5px; padding: 1.5px 6px; margin-left: 6px;
  white-space: nowrap; vertical-align: middle;
}

/* ============ v25a：模块管理开关 ============ */
.mod-flag-list { margin-top: 10px; display: flex; flex-direction: column; gap: 8px; }
.mod-flag-row {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 12px; border: 1px solid var(--border-soft); border-radius: 10px;
  background: var(--panel-2);
}
.mod-flag-row.off { opacity: .62; }
.mod-flag-row .mf-info { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.mod-flag-row .mf-info b { font-size: 13.5px; }
.mod-flag-row .mf-info i { font-style: normal; font-size: 11px; color: var(--text-3); }

/* ============ v26a：ICP 备案页脚 ============ */
.icp-foot {
  position: fixed;
  left: var(--sidebar-w);
  right: 0;
  bottom: 0;
  z-index: 300;
  text-align: center;
  padding: 3px 0 4px;
  font-size: 11px;
  background: var(--bg);
  pointer-events: none;
  transition: left .28s var(--ease);
}
.icp-foot a {
  pointer-events: auto;
  color: var(--text-3);
  text-decoration: none;
}
.icp-foot a:hover { color: var(--accent); text-decoration: underline; }
.icp-foot .cp { color: var(--text-3); }
.icp-foot .sep { color: var(--text-3); opacity: .55; margin: 0 5px; }
.icp-foot { white-space: nowrap; }
@media (max-width: 360px) { .icp-foot { font-size: 10px; } }
.icp-foot { transition: opacity .25s var(--ease); }
body.sb-open .icp-foot { opacity: 0; pointer-events: none; }
.composer-wrap { padding-bottom: calc(30px + env(safe-area-inset-bottom)); }
@media (max-width: 860px) {
  .icp-foot { left: 0; }
}
body.auth-locked .icp-foot { left: 0; }