/* ============ WeUI 设计令牌 ============
   默认浅色（微信白/绿）；[data-theme="dark"] 为微信暗色。
   JS 会把解析后的主题写到 <html data-theme>；未加载 JS 前用媒体查询跟随系统。 */
:root {
  --bg: #ededed;
  --bg-soft: #f7f7f7;
  --bg-elev: #ffffff;
  --bg-card: #ffffff;
  --border: #e2e2e2;
  --border-soft: rgba(0, 0, 0, .06);
  --text: #191919;
  --text-dim: #888888;
  --accent: #07c160;
  --accent-2: #06ad56;
  --accent-rgb: 7, 193, 96;
  --user: #d8f0e4;
  --on-accent: #ffffff;
  --overlay: rgba(0, 0, 0, .45);
  --shadow-soft: rgba(0, 0, 0, .14);
  --ok: #07c160;
  --err: #fa5151;
  --warn: #c9871f;
  --radius: 12px;
}
html[data-theme="dark"] {
  --bg: #111111;
  --bg-soft: #1a1a1a;
  --bg-elev: #1f1f1f;
  --bg-card: #1f1f1f;
  --border: #2c2c2c;
  --border-soft: rgba(255, 255, 255, .08);
  --text: #f2f2f2;
  --text-dim: #9a9a9a;
  --accent: #07c160;
  --accent-2: #06ad56;
  --accent-rgb: 7, 193, 96;
  --user: #23352b;
  --on-accent: #ffffff;
  --overlay: rgba(0, 0, 0, .6);
  --shadow-soft: rgba(0, 0, 0, .5);
  --ok: #07c160;
  --err: #fa5151;
  --warn: #ffc300;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --bg: #111111;
    --bg-soft: #1a1a1a;
    --bg-elev: #1f1f1f;
    --bg-card: #1f1f1f;
    --border: #2c2c2c;
    --border-soft: rgba(255, 255, 255, .08);
    --text: #f2f2f2;
    --text-dim: #9a9a9a;
    --accent: #07c160;
    --accent-2: #06ad56;
    --accent-rgb: 7, 193, 96;
    --user: #23352b;
    --on-accent: #ffffff;
    --overlay: rgba(0, 0, 0, .6);
    --shadow-soft: rgba(0, 0, 0, .5);
    --ok: #07c160;
    --err: #fa5151;
    --warn: #ffc300;
    --radius: 12px;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(900px 480px at 78% -12%, rgba(var(--accent-rgb), .10) 0%, transparent 60%),
    radial-gradient(700px 420px at 12% 108%, rgba(var(--accent-rgb), .08) 0%, transparent 60%),
    var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; }
svg { display: block; }
svg .k-bg { fill: var(--bg); }
svg .k-bg2 { fill: var(--bg-soft); }

.app { display: flex; height: 100vh; height: 100dvh; overflow: hidden; }

/* ---------- 左侧图标栏 ---------- */
.rail {
  width: 56px; flex: 0 0 56px;
  display: flex; flex-direction: column; align-items: center;
  padding: 12px 0; gap: 6px;
  border-right: 1px solid var(--border-soft);
  background: var(--bg-soft);
}
.rail-logo {
  width: 36px; height: 36px; border-radius: 11px; margin-bottom: 8px;
  display: grid; place-items: center; font-size: 17px; color: var(--on-accent);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 4px 18px rgba(var(--accent-rgb), .35);
}
.rail-btn {
  width: 38px; height: 38px; border-radius: 11px; border: none; cursor: pointer;
  background: transparent; color: var(--text-dim);
  display: grid; place-items: center; font-size: 14px; text-decoration: none;
}
.rail-btn:hover { background: var(--bg-elev); color: var(--text); box-shadow: inset 0 0 0 1px var(--border-soft); }
.rail-spacer { flex: 1; }

/* ---------- 会话抽屉 ---------- */
.drawer {
  position: fixed; left: 56px; top: 0; bottom: 0; width: 288px; z-index: 30;
  background: var(--bg-soft); border-right: 1px solid var(--border);
  /* left:56px 使 -100% 仍残留 56px 在屏内，需额外偏移；收起时不带阴影以免投影漏到图标栏 */
  transform: translateX(calc(-100% - 64px));
  transition: transform .25s ease, box-shadow .25s ease;
  display: flex; flex-direction: column;
  box-shadow: none;
}
.drawer.open { transform: none; box-shadow: 12px 0 40px var(--shadow-soft); }
.drawer-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 12px 10px 16px; border-bottom: 1px solid var(--border-soft);
  font-size: 14px;
}
.conv-list { flex: 1; overflow-y: auto; padding: 8px; }
.conv-item {
  display: flex; align-items: center; gap: 8px;
  padding: 10px; border-radius: 10px; cursor: pointer;
  color: var(--text-dim); font-size: 13.5px; margin-bottom: 2px;
}
.conv-item:hover { background: var(--bg-elev); color: var(--text); }
.conv-item.active { background: var(--bg-elev); color: var(--text); box-shadow: inset 0 0 0 1px var(--border); }
.conv-item .title { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.conv-item .date { flex: 0 0 auto; font-size: 11px; color: var(--text-dim); }
.conv-item .del { opacity: 0; border: none; background: none; color: var(--text-dim); cursor: pointer; font-size: 13px; padding: 2px 4px; }
.conv-item:hover .del { opacity: 1; }
.conv-item .del:hover { color: var(--err); }
.scrim { position: fixed; inset: 0; z-index: 25; background: rgba(0, 0, 0, .45); }

/* ---------- 主区 ---------- */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 18px; border-bottom: 1px solid var(--border-soft);
}
.site-name { font-size: 13.5px; font-weight: 600; color: var(--text-dim); letter-spacing: .02em; }
.top-right { display: flex; align-items: center; gap: 10px; }
.status { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; color: var(--text-dim); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); }
.dot.busy { background: var(--accent); animation: pulse 1s infinite; }
.dot.err { background: var(--err); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
.icon-btn {
  width: 30px; height: 30px; border-radius: 9px; cursor: pointer;
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--text-dim);
  display: grid; place-items: center;
}
.icon-btn:hover { color: var(--text); border-color: var(--accent); }

.notice {
  margin: 10px 18px 0; padding: 8px 14px; text-align: center;
  border: 1px solid var(--warn); background: var(--warn);
  color: var(--warn); border-radius: 10px; font-size: 12.5px;
}

/* ---------- 舞台：欢迎态 / 工作态 ---------- */
.stage { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.stream { flex: 1; min-height: 0; overflow-y: auto; padding: 22px 0; }
.stage.hero { justify-content: center; }
.stage.hero .stream { flex: 0 0 auto; overflow: hidden; display: block; padding: 0; }

.welcome { text-align: center; max-width: 760px; margin: 0 auto; padding: 0 24px 26px; }
.hero-logo {
  font-size: 40px; margin-bottom: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.welcome h1 { margin: 6px 0 10px; font-size: 30px; font-weight: 700; letter-spacing: .01em; }
.hero-sub { margin: 0 auto; color: var(--text-dim); font-size: 13.5px; line-height: 1.8; max-width: 520px; }
.stage.work .welcome { display: none; }

/* 欢迎区能力卡片 */
.hero-caps { display: flex; justify-content: center; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
.cap {
  display: flex; align-items: center; gap: 11px; cursor: pointer; text-align: left;
  padding: 12px 16px; border-radius: 14px; min-width: 178px;
  background: var(--bg-card); border: 1px solid var(--border-soft); color: var(--text-dim);
  transition: .16s;
}
.cap:hover { border-color: var(--accent); color: var(--text); transform: translateY(-2px); }
.cap.on { border-color: var(--accent); background: rgba(var(--accent-rgb), .12); color: var(--text); }
.cap .ci {
  flex: 0 0 34px; width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: var(--bg-elev); border: 1px solid var(--border); color: var(--accent);
}
.cap.on .ci { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--on-accent); border-color: transparent; }
.cap .ct { display: flex; flex-direction: column; gap: 1px; }
.cap .ct b { font-size: 13.5px; color: var(--text); font-weight: 600; }
.cap .ct i { font-style: normal; font-size: 11.5px; color: var(--text-dim); }

/* ---------- 创作面板 ---------- */
.dock { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 0 20px 18px; }
.stage.work .dock { padding-top: 12px; border-top: 1px solid var(--border-soft); background: var(--bg-soft); backdrop-filter: blur(10px); }

.types {
  display: flex; gap: 2px; padding: 4px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--border-soft);
  max-width: 100%; overflow-x: auto;
}
.types .mode {
  border: none; background: none; cursor: pointer; white-space: nowrap;
  padding: 8px 26px; border-radius: 999px; font-size: 13.5px; font-weight: 500; color: var(--text-dim);
}
.types .mode:hover { color: var(--text); }
.types .mode.active {
  color: var(--on-accent); font-weight: 600;
  background: var(--accent);
  box-shadow: 0 2px 10px rgba(var(--accent-rgb), .25);
}

.card {
  width: min(920px, 100%);
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 20px; padding: 14px 16px 10px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, .38);
  transition: border-color .15s;
}
.card:focus-within { border-color: var(--border); }

.card-top { display: flex; gap: 12px; align-items: flex-start; }
#prompt {
  flex: 1; border: none; background: transparent; color: var(--text);
  resize: none; outline: none; font: inherit; font-size: 15px; line-height: 1.65;
  min-height: 52px; max-height: 180px; padding: 4px 0;
}
#prompt::placeholder { color: var(--text-dim); }

/* 参考图 */
.attach { flex: 0 0 auto; }
.attach-add {
  width: 62px; height: 62px; border-radius: 12px; cursor: pointer;
  border: 1.5px dashed var(--border); background: var(--bg-soft); color: var(--text-dim);
  display: grid; place-items: center; transition: .15s;
}
.attach-add:hover, .attach-add.drag { border-color: var(--accent); color: var(--text); }
.attach-prev { position: relative; }
.attach-prev img { width: 62px; height: 62px; object-fit: cover; border-radius: 12px; border: 1px solid var(--border); display: block; }
.attach-x {
  position: absolute; top: -7px; right: -7px; width: 20px; height: 20px;
  border-radius: 50%; border: 1px solid var(--border); cursor: pointer;
  background: var(--bg-elev); color: var(--text-dim); font-size: 10px; line-height: 1;
  display: grid; place-items: center;
}
.attach-x:hover { color: var(--err); border-color: var(--err); }

/* 参数区 */
.params {
  margin-top: 10px; padding-top: 12px; border-top: 1px dashed var(--border);
  display: flex; flex-direction: column; gap: 9px;
}
.p-row { display: flex; align-items: center; gap: 12px; font-size: 13px; }
.p-row.col { flex-direction: column; align-items: stretch; gap: 6px; }
.p-label { flex: 0 0 92px; color: var(--text-dim); }
.p-row.col .p-label { flex: none; }
.p-ctrl { flex: 1; display: flex; flex-wrap: wrap; align-items: center; gap: 6px; min-width: 0; }
.chipopt {
  padding: 6px 13px; border-radius: 999px; cursor: pointer; font-size: 12.5px;
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--text-dim);
}
.chipopt:hover { color: var(--text); }
.chipopt.on { border-color: var(--accent); color: var(--text); background: rgba(var(--accent-rgb), .14); }
.p-ctrl select, .p-ctrl input[type="number"], .p-ctrl input[type="text"] {
  background: var(--bg-soft); border: 1px solid var(--border); color: var(--text);
  border-radius: 9px; padding: 6px 10px; font-size: 12.5px; outline: none; font-family: inherit;
}
.p-ctrl input[type="number"] { width: 96px; }
.p-ctrl select:focus, .p-ctrl input:focus { border-color: var(--accent); }
.p-ctrl textarea {
  width: 100%; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text);
  border-radius: 10px; padding: 8px 10px; font-size: 12.5px; font-family: inherit; outline: none; resize: vertical; min-height: 34px;
}
.p-ctrl textarea:focus { border-color: var(--accent); }
.p-switch { position: relative; width: 36px; height: 20px; }
.p-switch input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.p-switch i {
  position: absolute; inset: 0; border-radius: 999px; pointer-events: none;
  background: var(--bg-soft); border: 1px solid var(--border); transition: .15s;
}
.p-switch i::after {
  content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--text-dim); transition: .15s;
}
.p-switch input:checked + i { background: rgba(var(--accent-rgb), .3); border-color: var(--accent); }
.p-switch input:checked + i::after { left: 18px; background: var(--on-accent); }
.p-hint { color: var(--text-dim); font-size: 12px; }

/* 卡片底栏 */
.card-bar { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 10px; }
.bar-left { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; min-width: 0; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  padding: 7px 12px; border-radius: 999px; font-size: 12.5px;
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--text-dim);
}
.chip:hover { color: var(--text); border-color: var(--border); }
.chip.on { color: var(--text); border-color: var(--accent); }
.chip .badge {
  min-width: 16px; height: 16px; padding: 0 4px; border-radius: 999px;
  display: grid; place-items: center; font-size: 10.5px; font-weight: 700;
  background: var(--accent); color: var(--on-accent);
}
.model-chip { padding-right: 9px; }
.model-select {
  appearance: none; -webkit-appearance: none; border: none; background: transparent; outline: none;
  color: var(--text); font-size: 12.5px; font-family: inherit; max-width: 240px; cursor: pointer;
}
.model-select option { background: var(--bg-elev); color: var(--text); }
.send {
  width: 38px; height: 38px; border-radius: 50%; border: none; cursor: pointer; flex: 0 0 auto;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--on-accent);
  display: grid; place-items: center; box-shadow: 0 4px 16px rgba(var(--accent-rgb), .35);
}
.send:hover { filter: brightness(1.12); }
.send:disabled { background: var(--bg-soft); color: var(--text-dim); box-shadow: none; cursor: not-allowed; filter: none; }

/* 建议 chips */
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 920px; }
.chip-sample {
  padding: 8px 15px; border-radius: 999px; cursor: pointer; font-size: 12.5px;
  border: 1px solid var(--border-soft); background: var(--bg-card); color: var(--text-dim);
}
.chip-sample:hover { color: var(--text); border-color: var(--accent); transform: translateY(-1px); }
.stage.work .chips { display: none; }

/* ---------- 消息流 ---------- */
.stream .inner { max-width: 920px; margin: 0 auto; padding: 0 20px; display: flex; flex-direction: column; gap: 20px; }
.msg { display: flex; gap: 10px; }
.msg.user { flex-direction: row-reverse; }
.msg .avatar {
  flex: 0 0 32px; width: 32px; height: 32px; border-radius: 10px;
  display: grid; place-items: center; font-size: 14px;
}
.msg.user .avatar { background: var(--user); }
.msg.assistant .avatar { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--on-accent); }
.bubble {
  background: var(--bg-elev); border: 1px solid var(--border-soft);
  border-radius: 16px; padding: 12px 15px; max-width: min(720px, 100%);
}
.msg.user .bubble { background: var(--user); border-color: rgba(var(--accent-rgb), .25); }
.bubble .meta { font-size: 11.5px; color: var(--text-dim); margin-bottom: 6px; }
.bubble .text { white-space: pre-wrap; word-break: break-word; line-height: 1.7; font-size: 14.5px; }
.bubble.error { border-color: var(--err); }
.bubble.error .text { color: var(--err); }

.media-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.media-grid a { display: block; max-width: 380px; width: 100%; }
.media-grid img, .media-grid video {
  max-width: 380px; width: 100%; border-radius: 12px; display: block;
  border: 1px solid var(--border); background: var(--bg-soft);
}
.media-grid a:hover img { border-color: var(--accent); }
.msg-actions { margin-top: 8px; display: flex; gap: 10px; }
.ma-btn {
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--text-dim);
  font-size: 12px; padding: 4px 10px; border-radius: 8px; cursor: pointer;
}
.ma-btn:hover { color: var(--text); border-color: var(--accent); }
.media-actions { margin-top: 8px; }
.media-actions a { font-size: 12.5px; color: var(--accent); text-decoration: none; margin-right: 12px; }
.media-actions a:hover { text-decoration: underline; }

.progress { display: flex; align-items: center; gap: 10px; color: var(--text-dim); font-size: 13px; padding: 6px 0; }
.spinner { width: 16px; height: 16px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.typing span { display: inline-block; width: 6px; height: 6px; margin: 0 2px; background: var(--text-dim); border-radius: 50%; animation: blink 1.2s infinite; }
.typing span:nth-child(2) { animation-delay: .2s; }
.typing span:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }

/* ---------- 全局 Toast ---------- */
.toasts {
  position: fixed; top: 16px; right: 16px; z-index: 80;
  display: flex; flex-direction: column; gap: 10px; max-width: 340px; pointer-events: none;
}
.toast {
  display: flex; align-items: flex-start; gap: 10px; padding: 11px 14px; border-radius: 12px;
  background: var(--bg-elev); border: 1px solid var(--border); color: var(--text);
  box-shadow: 0 12px 34px rgba(0, 0, 0, .5); font-size: 13px; line-height: 1.5;
  animation: tin .22s ease;
}
.toast.out { opacity: 0; transform: translateX(14px); transition: .25s; }
.toast.ok { border-color: var(--ok); }
.toast.err { border-color: var(--err); }
.toast .ti {
  flex: 0 0 18px; width: 18px; height: 18px; border-radius: 50%; margin-top: 1px;
  display: grid; place-items: center; font-size: 11px; font-weight: 700; color: var(--on-accent); background: var(--ok);
}
.toast.err .ti { background: var(--err); }
.toast .tx { flex: 1; word-break: break-word; }
@keyframes tin { from { opacity: 0; transform: translateX(14px); } to { opacity: 1; transform: none; } }

/* ---------- 图片放大 ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 90; display: grid; place-items: center;
  background: var(--overlay); backdrop-filter: blur(6px); padding: 40px;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: min(1100px, 92vw); max-height: 86vh; border-radius: 14px; border: 1px solid var(--border); box-shadow: 0 30px 80px rgba(0, 0, 0, .6); }
.lb-close {
  position: absolute; top: 18px; right: 18px; width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--bg-elev); color: var(--text-dim); cursor: pointer; font-size: 15px;
}
.lb-close:hover { color: var(--text); border-color: var(--accent); }

/* ---------- 滚动条 ---------- */
.stream::-webkit-scrollbar, .conv-list::-webkit-scrollbar { width: 8px; }
.stream::-webkit-scrollbar-thumb, .conv-list::-webkit-scrollbar-thumb { background: var(--bg-soft); border-radius: 8px; }
.stream::-webkit-scrollbar-track, .conv-list::-webkit-scrollbar-track { background: transparent; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .rail { width: 46px; flex-basis: 46px; }
  .drawer { left: 0; width: min(300px, 84vw); }
  .welcome { transform: none; }
  .welcome h1 { font-size: 24px; }
  .hero-caps { gap: 8px; }
  .cap { min-width: 0; flex: 1 1 46%; padding: 10px 12px; }
  .cap .ct i { display: none; }
  .dock { padding: 0 12px 12px; }
  .types .mode { padding: 7px 16px; }
  .p-label { flex-basis: 76px; }
  .media-grid img, .media-grid video { max-width: 100%; }
  .site-name { max-width: 40vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
}

/* ---------- 大屏（≥1440 / ≥1800）加宽创作区，减少留白 ---------- */
@media (min-width: 1440px) {
  .card { width: min(1000px, 100%); }
  .stream .inner { max-width: 1000px; }
  .chips { max-width: 1000px; }
  .welcome { max-width: 820px; }
  .welcome h1 { font-size: 34px; }
}
@media (min-width: 1800px) {
  .card { width: min(1080px, 100%); }
  .stream .inner { max-width: 1080px; }
  .chips { max-width: 1080px; }
  .welcome { max-width: 880px; }
  .media-grid img, .media-grid video { max-width: 440px; }
}
