:root {
  --bg: #0e0b16;
  --bg2: #171226;
  --card: #1d1830;
  --card2: #241e3a;
  --border: rgba(255,255,255,.08);
  --text: #f3eefc;
  --muted: #9a90b8;
  --accent: #a78bfa;
  --travel: #2dd4bf;
  --travel-2: #f59e0b;
  --emotion: #f472b6;
  --emotion-2: #a78bfa;
  --danger: #f87171;
  --radius: 20px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 50% -10%, #2a1f4d 0%, var(--bg) 55%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
  line-height: 1.6;
}

#app { max-width: 560px; margin: 0 auto; padding: 20px 16px 120px; }

/* ---------- 顶栏 ---------- */
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; }
.brand .logo { font-size: 26px; }
.brand small { display: block; font-size: 11px; font-weight: 400; color: var(--muted); }

/* ---------- 房间卡片 ---------- */
.rooms { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 22px; }
.room {
  border-radius: var(--radius); padding: 18px 16px; cursor: pointer; position: relative;
  border: 1px solid var(--border); overflow: hidden; transition: transform .15s ease, box-shadow .15s ease;
}
.room:active { transform: scale(.97); }
.room .icon { font-size: 30px; }
.room .name { font-size: 16px; font-weight: 700; margin-top: 8px; }
.room .tagline { font-size: 12px; color: rgba(255,255,255,.72); margin-top: 4px; line-height: 1.45; }
.room.travel { background: linear-gradient(145deg, rgba(45,212,191,.22), rgba(245,158,11,.10)); }
.room.emotion { background: linear-gradient(145deg, rgba(244,114,182,.22), rgba(167,139,250,.14)); }

/* ---------- 区块标题 ---------- */
.section-title { display: flex; align-items: center; justify-content: space-between; margin: 20px 0 12px; }
.section-title h2 { font-size: 15px; margin: 0; color: var(--text); }
.tabs { display: flex; gap: 8px; }
.tab {
  border: 1px solid var(--border); background: transparent; color: var(--muted);
  padding: 5px 12px; border-radius: 999px; font-size: 12px; cursor: pointer;
}
.tab.active { background: var(--accent); color: #0e0b16; border-color: var(--accent); font-weight: 600; }

/* ---------- 心声列表 ---------- */
.feed { display: flex; flex-direction: column; gap: 10px; }
.letter-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 14px 16px; cursor: pointer; transition: border-color .15s ease;
}
.letter-card:hover { border-color: rgba(255,255,255,.18); }
.letter-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.badge { font-size: 11px; padding: 2px 9px; border-radius: 999px; font-weight: 600; }
.badge.travel { background: rgba(45,212,191,.16); color: var(--travel); }
.badge.emotion { background: rgba(244,114,182,.16); color: var(--emotion); }
.letter-nick { font-size: 12px; color: var(--muted); }
.letter-content { font-size: 14px; color: var(--text); white-space: pre-wrap; word-break: break-word; }
.letter-foot { display: flex; align-items: center; gap: 14px; margin-top: 10px; font-size: 12px; color: var(--muted); }

/* ---------- 写信按钮 ---------- */
.fab {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 28px;
  background: linear-gradient(135deg, var(--accent), #7c5cf0);
  color: #fff; border: none; border-radius: 999px; padding: 14px 26px;
  font-size: 15px; font-weight: 700; cursor: pointer; box-shadow: 0 10px 30px rgba(124,92,240,.45);
}
.fab:active { transform: translateX(-50%) scale(.96); }

/* ---------- 弹层 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.62); z-index: 50;
  display: flex; align-items: flex-end; justify-content: center;
}
.sheet {
  background: var(--bg2); width: 100%; max-width: 560px;
  border-radius: 24px 24px 0 0; padding: 22px 18px 30px;
  animation: up .25s ease;
}
@keyframes up { from { transform: translateY(40px); opacity: .4; } to { transform: none; opacity: 1; } }
.sheet h3 { margin: 0 0 14px; font-size: 18px; }
.sheet .close { float: right; background: none; border: none; color: var(--muted); font-size: 22px; cursor: pointer; }

/* 分类选择 */
.cat-row { display: flex; gap: 10px; margin-bottom: 14px; }
.cat-pill {
  flex: 1; text-align: center; padding: 12px 8px; border-radius: 14px; cursor: pointer;
  border: 1.5px solid var(--border); background: var(--card); font-size: 14px;
}
.cat-pill.active { border-color: var(--accent); background: rgba(167,139,250,.12); }

textarea {
  width: 100%; min-height: 120px; background: var(--card); color: var(--text);
  border: 1px solid var(--border); border-radius: 14px; padding: 14px; font-size: 15px;
  resize: vertical; font-family: inherit; line-height: 1.6;
}
textarea:focus { outline: none; border-color: var(--accent); }
.count { text-align: right; font-size: 12px; color: var(--muted); margin: 6px 2px 12px; }

.btn {
  width: 100%; border: none; border-radius: 14px; padding: 14px; font-size: 15px;
  font-weight: 700; cursor: pointer; color: #fff;
  background: linear-gradient(135deg, var(--accent), #7c5cf0);
}
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn.small { width: auto; padding: 8px 14px; font-size: 13px; border-radius: 10px; }

/* ---------- 分享卡片 ---------- */
.share-card { text-align: center; }
.share-card .title { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.share-card .sub { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.card-visual {
  border-radius: 20px; padding: 24px 20px; text-align: left; margin-bottom: 16px;
  border: 1px solid var(--border); position: relative; overflow: hidden;
}
.card-visual.travel { background: linear-gradient(160deg, #123c38, #3b2a12); }
.card-visual.emotion { background: linear-gradient(160deg, #3c1e34, #2a1f4d); }
.card-visual .cnick { font-size: 12px; color: rgba(255,255,255,.7); margin-bottom: 10px; }
.card-visual .ctext { font-size: 16px; line-height: 1.7; white-space: pre-wrap; word-break: break-word; }
.card-visual .cfoot { margin-top: 14px; font-size: 12px; color: rgba(255,255,255,.6); }
.link-box {
  display: flex; gap: 8px; background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 8px 10px; align-items: center; margin-bottom: 14px;
}
.link-box input {
  flex: 1; background: transparent; border: none; color: var(--text); font-size: 13px; min-width: 0;
}
.link-box input:focus { outline: none; }
.share-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.share-btns .btn { font-size: 14px; }

/* ---------- 回信页 ---------- */
.letter-detail { padding-bottom: 20px; }
.back { background: none; border: none; color: var(--muted); font-size: 14px; cursor: pointer; padding: 0; margin-bottom: 14px; }
.letter-detail .letter-card { cursor: default; }
.reply-form { margin-top: 16px; }
.persona-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.persona {
  border: 1px solid var(--border); background: var(--card); color: var(--muted);
  padding: 7px 12px; border-radius: 999px; font-size: 13px; cursor: pointer;
}
.persona.active { border-color: var(--accent); color: var(--text); background: rgba(167,139,250,.14); }
.reply-item {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 13px 15px; margin-bottom: 10px;
}
.reply-item .rhead { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.reply-item .rid { font-size: 12px; color: var(--muted); }
.reply-item .rbody { font-size: 14px; white-space: pre-wrap; word-break: break-word; }

/* ---------- 危机干预 ---------- */
.crisis-banner {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 90px; width: calc(100% - 32px);
  max-width: 528px; background: #2a1730; border: 1px solid rgba(244,114,182,.4);
  border-radius: 16px; padding: 16px; z-index: 60; font-size: 13px; line-height: 1.7;
}
.crisis-banner a { color: #f9a8d4; }
.crisis-banner .close { float: right; background: none; border: none; color: var(--muted); font-size: 18px; cursor: pointer; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 100px;
  background: rgba(30,26,48,.95); border: 1px solid var(--border); color: var(--text);
  padding: 10px 18px; border-radius: 999px; font-size: 13px; z-index: 100;
}

.empty { text-align: center; color: var(--muted); font-size: 13px; padding: 30px 0; }
.muted { color: var(--muted); font-size: 12px; }

/* ---------- AI 助手 ---------- */
.ai-fab {
  position: fixed; right: 18px; bottom: 90px; width: 52px; height: 52px; border-radius: 50%;
  border: none; background: linear-gradient(135deg, #a78bfa, #ec4899);
  color: #fff; font-size: 22px; cursor: pointer; z-index: 70;
  box-shadow: 0 8px 24px rgba(167,139,250,.45);
}
.ai-fab:active { transform: scale(.94); }
.ai-sheet {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 0; z-index: 80;
  width: 100%; max-width: 560px; height: min(72vh, 560px);
  background: var(--bg2); border-radius: 22px 22px 0 0;
  display: flex; flex-direction: column; border-top: 1px solid var(--border);
  animation: up .22s ease;
}
.ai-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 15px;
}
.ai-close { background: none; border: none; color: var(--muted); font-size: 22px; cursor: pointer; }
.ai-msgs { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.ai-msg { max-width: 86%; padding: 10px 13px; border-radius: 16px; font-size: 14px; line-height: 1.65; white-space: pre-wrap; word-break: break-word; }
.ai-msg.ai { align-self: flex-start; background: var(--card); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.ai-msg.user { align-self: flex-end; background: linear-gradient(135deg, var(--accent), #7c5cf0); color: #fff; border-bottom-right-radius: 4px; }
.ai-chips { display: flex; gap: 8px; padding: 4px 14px 10px; flex-wrap: wrap; }
.ai-chip {
  border: 1px solid rgba(167,139,250,.4); background: rgba(167,139,250,.08); color: #d8ccff;
  border-radius: 999px; padding: 6px 12px; font-size: 12px; cursor: pointer;
}
.ai-chip:active { background: rgba(167,139,250,.2); }
.ai-input-row { display: flex; gap: 8px; padding: 8px 14px 18px; }
.ai-input-row input {
  flex: 1; background: var(--card); color: var(--text); border: 1px solid var(--border);
  border-radius: 12px; padding: 11px 13px; font-size: 14px; font-family: inherit; min-width: 0;
}
.ai-input-row input:focus { outline: none; border-color: var(--accent); }
.ai-send {
  background: linear-gradient(135deg, var(--accent), #7c5cf0); color: #fff; border: none;
  border-radius: 12px; padding: 0 18px; font-size: 14px; font-weight: 700; cursor: pointer;
}
.ai-send:disabled { opacity: .6; cursor: not-allowed; }

/* AI 回信在回声列表里的样式 */
.reply-item.ai { border-color: rgba(167,139,250,.4); background: linear-gradient(160deg, rgba(167,139,250,.10), var(--card)); }

/* ---------- 账号 / 顶栏 ---------- */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 18px; }
.top-login, .top-user {
  background: linear-gradient(135deg, var(--accent), #7c5cf0); color: #fff; border: none;
  border-radius: 999px; padding: 8px 16px; font-size: 13px; font-weight: 600; cursor: pointer; white-space: nowrap;
}
.top-user { background: var(--card2); border: 1px solid var(--border); color: var(--text); }
.field {
  width: 100%; background: var(--card); color: var(--text); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 13px; font-size: 14px; margin-bottom: 12px; font-family: inherit;
}
.field:focus { outline: none; border-color: var(--accent); }

/* ---------- 个人中心 ---------- */
.profile { text-align: center; padding: 10px 0 6px; }
.avatar { font-size: 52px; }
.pname { font-size: 20px; font-weight: 700; margin: 6px 0 2px; }

/* ---------- 翻译按钮 ---------- */
.tr-btn {
  background: transparent; border: 1px solid rgba(167,139,250,.45); color: #c9baff;
  border-radius: 999px; padding: 3px 10px; font-size: 12px; cursor: pointer; margin-left: auto;
}
.tr-btn:disabled { opacity: .6; cursor: wait; }
.letter-foot .tr-btn { margin-left: auto; }

.ai-sheet[hidden] { display: none; }

/* ---------- 个人资料编辑 ---------- */
.pbio { color: var(--text); font-size: 14px; margin: 6px 0; }
.avatar-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.ava {
  width: 44px; height: 44px; font-size: 22px; border-radius: 12px; cursor: pointer;
  background: var(--card); border: 1.5px solid var(--border); display: flex; align-items: center; justify-content: center;
}
.ava.on { border-color: var(--accent); background: rgba(167,139,250,.16); }

/* ---------- 顶栏消息铃铛 ---------- */
.top-right { display: flex; align-items: center; gap: 8px; }
.top-bell {
  position: relative; background: var(--card2); border: 1px solid var(--border); color: var(--text);
  width: 38px; height: 38px; border-radius: 50%; font-size: 17px; cursor: pointer;
}
.badge-n {
  position: absolute; top: -5px; right: -6px; min-width: 18px; height: 18px; padding: 0 4px;
  background: #ef4444; color: #fff; border-radius: 999px; font-size: 11px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; box-sizing: border-box;
}
.badge-n[hidden] { display: none; }

/* ---------- 公开信箱开关 ---------- */
.mailbox-card { display: flex; align-items: center; gap: 12px; margin: 16px auto 0; max-width: 360px; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 12px 14px; }
.switch { position: relative; display: inline-block; width: 46px; height: 26px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; inset: 0; background: #3a3452; border-radius: 999px; transition: .2s; cursor: pointer; }
.slider::before { content: ''; position: absolute; width: 20px; height: 20px; left: 3px; top: 3px; background: #fff; border-radius: 50%; transition: .2s; }
.switch input:checked + .slider { background: linear-gradient(135deg, var(--accent), #7c5cf0); }
.switch input:checked + .slider::before { transform: translateX(20px); }
.avatar-sm { font-size: 18px; }

/* ---------- 私聊 ---------- */
.chat-page { display: flex; flex-direction: column; height: calc(100vh - 120px); }
.chat-head { display: flex; align-items: center; gap: 8px; padding: 8px 4px 12px; font-weight: 700; }
.chat-box { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; padding: 6px 2px; }
.cb { display: flex; flex-direction: column; max-width: 78%; }
.cb.mine { align-self: flex-end; align-items: flex-end; }
.cb.other { align-self: flex-start; align-items: flex-start; }
.bub { padding: 10px 13px; border-radius: 16px; font-size: 14px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.cb.mine .bub { background: linear-gradient(135deg, var(--accent), #7c5cf0); color: #fff; border-bottom-right-radius: 4px; }
.cb.other .bub { background: var(--card); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.cb .t { font-size: 11px; margin-top: 2px; }
.chat-input-row { display: flex; gap: 8px; padding-top: 10px; }
.chat-input-row input { flex: 1; background: var(--card); color: var(--text); border: 1px solid var(--border); border-radius: 12px; padding: 11px 13px; font-size: 14px; font-family: inherit; min-width: 0; }
.chat-input-row input:focus { outline: none; border-color: var(--accent); }

/* ---------- 回信点赞 ---------- */
.like-row { margin-top: 8px; display: flex; }
.like-btn {
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  border-radius: 999px; padding: 3px 12px; font-size: 12px; cursor: pointer;
}
.like-btn.on { color: #f472b6; border-color: rgba(244,114,182,.5); }
.like-cnt { margin-left: auto; color: var(--muted); font-size: 12px; }

.del-btn {
  background: transparent; border: 1px solid rgba(248,113,113,.4); color: #fca5a5;
  border-radius: 999px; padding: 2px 10px; font-size: 12px; cursor: pointer;
}

.btn.danger { background: linear-gradient(135deg, #ef4444, #b91c1c); }
.del-sheet h3 { color: #f87171; }