/* ============================================================
   班级工具箱 · 样式（手机优先）
   ============================================================ */
:root {
  --purple: #6C2BD9;
  --purple-d: #4E1FA8;
  --purple-t: #F1EAFE;
  --bg: #F5F5F7;
  --card: #FFFFFF;
  --fg: #14121A;
  --fg2: #5C5870;
  --fg3: #9691A8;
  --line: #E8E6EF;
  --ok: #12A150;
  --ok-t: #E6F7ED;
  --warn: #C9820A;
  --warn-t: #FDF3E0;
  --danger: #D93636;
  --danger-t: #FDECEC;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(20, 18, 26, .04), 0 6px 18px rgba(20, 18, 26, .06);
  --tabh: 60px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121016; --card: #1C1A22; --fg: #F2F0F6; --fg2: #A9A4B8; --fg3: #78738A;
    --line: #2C2935; --purple-t: #2A1F45; --ok-t: #10301F; --warn-t: #33260C; --danger-t: #3A1A1A;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35);
  }
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: var(--purple); text-decoration: none; }
.hide { display: none !important; }

/* ---------- 顶部标识条 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  background: linear-gradient(135deg, var(--purple) 0%, var(--purple-d) 100%);
  color: #fff; padding: calc(env(safe-area-inset-top) + 12px) 16px 14px;
}
.topbar .row { display: flex; align-items: center; gap: 10px; }
.badge-logo {
  width: 38px; height: 38px; border-radius: 11px; flex: 0 0 auto;
  background: rgba(255, 255, 255, .18); display: grid; place-items: center;
  font-weight: 700; font-size: 16px; letter-spacing: -.5px; overflow: hidden;
}
.badge-logo img { width: 100%; height: 100%; object-fit: cover; }
.topbar .who { flex: 1; min-width: 0; }
.topbar .cls { font-size: 16px; font-weight: 650; letter-spacing: .2px; }
.topbar .sub { font-size: 12px; opacity: .8; margin-top: 1px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sync { display: flex; align-items: center; gap: 5px; font-size: 11.5px;
  background: rgba(255, 255, 255, .16); padding: 5px 9px; border-radius: 999px; flex: 0 0 auto; }
.sync .dot { width: 6px; height: 6px; border-radius: 50%; background: #7DF0B0; }
.sync[data-s="off"] .dot { background: #FFC46B; }
.avatar-me {
  width: 34px; height: 34px; border-radius: 50%; flex: 0 0 auto;
  background: rgba(255, 255, 255, .22); border: 1px solid rgba(255, 255, 255, .35);
  display: grid; place-items: center; font-weight: 600; font-size: 14px;
}

/* ---------- 视图容器 ---------- */
.wrap { padding: 14px 14px calc(var(--tabh) + 34px); max-width: 720px; margin: 0 auto; }
.view { display: none; }
.view.on { display: block; }
.sec-title { display: flex; align-items: center; gap: 8px; margin: 20px 4px 10px; font-size: 13px;
  color: var(--fg2); font-weight: 600; letter-spacing: .3px; }
.sec-title:first-child { margin-top: 4px; }
.sec-title .n { background: var(--purple-t); color: var(--purple); border-radius: 999px;
  padding: 1px 7px; font-size: 11.5px; }
.empty { text-align: center; color: var(--fg3); padding: 42px 20px; font-size: 13.5px; }
.empty .big { font-size: 30px; display: block; margin-bottom: 10px; opacity: .5; }

/* ---------- 卡片通用 ---------- */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  margin-bottom: 12px; overflow: hidden; }
.card.pinned { box-shadow: 0 0 0 1.5px var(--purple) inset, var(--shadow); }
.card-body { padding: 14px 15px 12px; }
.card-h { display: flex; align-items: flex-start; gap: 8px; }
.card-h h3 { margin: 0; font-size: 16px; font-weight: 650; line-height: 1.35; flex: 1; }
.chip { font-size: 11px; padding: 2.5px 8px; border-radius: 999px; font-weight: 600; flex: 0 0 auto;
  background: var(--purple-t); color: var(--purple); }
.chip.科研 { background: #E9F2FE; color: #1D63C9; }
.chip.竞赛 { background: #FDF3E0; color: var(--warn); }
.chip.活动 { background: var(--ok-t); color: var(--ok); }
.chip.讲座 { background: #F3EAFE; color: #7B2BD9; }
.chip.其他 { background: #EEEFF2; color: var(--fg2); }
@media (prefers-color-scheme: dark) { .chip.其他 { background: #2A2833; } }
.pin-mark { font-size: 11px; color: var(--purple); font-weight: 700; flex: 0 0 auto; padding-top: 3px; }
.text { color: var(--fg); font-size: 14.5px; white-space: pre-wrap; word-break: break-word; margin-top: 8px; }
.text.clamp { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.more { font-size: 12.5px; color: var(--purple); margin-top: 4px; display: inline-block; }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 10px;
  font-size: 12px; color: var(--fg3); }
.meta .deadline { color: var(--danger); font-weight: 600; }
.meta .deadline.ok { color: var(--fg2); font-weight: 500; }
.link-btn { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; font-weight: 600;
  background: var(--purple-t); color: var(--purple); padding: 7px 12px; border-radius: 10px; margin-top: 10px; }

/* ---------- 互动条 ---------- */
.acts { border-top: 1px solid var(--line); display: flex; align-items: stretch; }
.act { flex: 1; display: flex; align-items: center; justify-content: center; gap: 5px;
  padding: 10px 4px; font-size: 13px; color: var(--fg2); background: none; border: 0; cursor: pointer; }
.act + .act { border-left: 1px solid var(--line); }
.act:active { background: rgba(108, 43, 217, .07); }
.act.on { color: var(--ok); font-weight: 650; }
.act.on-received { color: var(--ok); font-weight: 650; background: var(--ok-t); }
.act .ic { font-size: 15px; }
.emoji-strip { display: flex; flex-wrap: wrap; gap: 6px; padding: 9px 12px; border-top: 1px solid var(--line); }
.emoji-strip button { border: 1px solid var(--line); background: var(--card); border-radius: 999px;
  padding: 3px 9px; font-size: 13px; cursor: pointer; }
.emoji-strip button.on { border-color: var(--purple); background: var(--purple-t); }

/* ---------- 名单 / 留言 ---------- */
.panel { border-top: 1px solid var(--line); padding: 11px 15px 13px; background: rgba(108, 43, 217, .03); }
.panel h4 { margin: 0 0 8px; font-size: 12.5px; color: var(--fg2); font-weight: 600; }
.names { display: flex; flex-wrap: wrap; gap: 6px; }
.name-tag { font-size: 12.5px; background: var(--bg); border: 1px solid var(--line);
  border-radius: 999px; padding: 3px 10px; display: inline-flex; align-items: center; gap: 4px; }
.name-tag.me { background: var(--ok-t); border-color: transparent; color: var(--ok); font-weight: 600; }
.name-tag.wait { color: var(--warn); border-style: dashed; }
.cmt { display: flex; gap: 8px; padding: 7px 0; }
.cmt .av { width: 26px; height: 26px; border-radius: 50%; flex: 0 0 auto; background: var(--purple-t);
  color: var(--purple); display: grid; place-items: center; font-size: 12px; font-weight: 600; }
.cmt .cbody { flex: 1; min-width: 0; }
.cmt .cn { font-size: 12px; color: var(--fg2); font-weight: 600; }
.cmt .ct { font-size: 14px; white-space: pre-wrap; word-break: break-word; }
.cmt .cd { font-size: 11px; color: var(--fg3); margin-top: 2px; display: flex; gap: 10px; }
.cmt .cd button { background: none; border: 0; padding: 0; color: var(--fg3); font-size: 11px; cursor: pointer; }
.cmt-form { display: flex; gap: 7px; margin-top: 8px; }
.cmt-form input { flex: 1; border: 1px solid var(--line); border-radius: 10px; padding: 8px 11px;
  background: var(--card); font-size: 14px; }
.btn-s { border: 0; background: var(--purple); color: #fff; border-radius: 10px; padding: 0 14px;
  font-size: 13.5px; font-weight: 600; cursor: pointer; }

/* ---------- 找搭子 ---------- */
.buddy-prog { height: 6px; border-radius: 99px; background: var(--line); overflow: hidden; margin-top: 10px; }
.buddy-prog i { display: block; height: 100%; background: var(--purple); border-radius: 99px; transition: width .3s; }
.buddy-prog.full i { background: var(--warn); }
.buddy-foot { display: flex; align-items: center; gap: 8px; margin-top: 10px; }
.avatars { display: flex; }
.avatars .a { width: 26px; height: 26px; border-radius: 50%; background: var(--purple-t); color: var(--purple);
  display: grid; place-items: center; font-size: 11.5px; font-weight: 600; border: 2px solid var(--card); margin-left: -7px; }
.avatars .a:first-child { margin-left: 0; }
.avatars .a.more { background: var(--line); color: var(--fg2); }
.stat { font-size: 12px; color: var(--fg2); }
.stat b { color: var(--fg); }
.badge-s { font-size: 11px; padding: 2.5px 8px; border-radius: 6px; font-weight: 600; }
.badge-s.open { background: var(--ok-t); color: var(--ok); }
.badge-s.full { background: var(--warn-t); color: var(--warn); }
.badge-s.closed { background: #EEEFF2; color: var(--fg3); }
.badge-s.pending { background: var(--warn-t); color: var(--warn); }
.badge-s.joined { background: var(--purple-t); color: var(--purple); }
@media (prefers-color-scheme: dark) { .badge-s.closed { background: #2A2833; } }
.tagrow { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.tag { font-size: 11.5px; color: var(--fg2); background: var(--bg); border: 1px solid var(--line);
  border-radius: 6px; padding: 2px 7px; }
.btn { border: 0; border-radius: 11px; padding: 10px 14px; font-size: 14px; font-weight: 620; cursor: pointer;
  background: var(--purple); color: #fff; }
.btn.ghost { background: var(--purple-t); color: var(--purple); }
.btn.line { background: transparent; border: 1px solid var(--line); color: var(--fg2); }
.btn.danger { background: var(--danger-t); color: var(--danger); }
.btn.ok { background: var(--ok); }
.btn[disabled] { opacity: .45; }
.btn.block { width: 100%; }
.btn-row { display: flex; gap: 8px; margin-top: 12px; }
.btn-row .btn { flex: 1; }

/* ---------- 底部 tab ---------- */
.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; height: var(--tabh);
  padding-bottom: env(safe-area-inset-bottom);
  background: color-mix(in srgb, var(--card) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px); -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-top: 1px solid var(--line); display: flex;
}
.tabbar button { flex: 1; border: 0; background: none; color: var(--fg3); font-size: 11px; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; padding: 0; position: relative; }
.tabbar button .ic { font-size: 20px; line-height: 1; filter: grayscale(1) opacity(.6); }
.tabbar button.on { color: var(--purple); font-weight: 650; }
.tabbar button.on .ic { filter: none; }
.tabbar .nb { position: absolute; top: 4px; right: calc(50% - 22px); background: var(--danger); color: #fff;
  font-size: 10px; min-width: 16px; height: 16px; border-radius: 999px; padding: 0 4px;
  display: grid; place-items: center; font-weight: 700; }

/* ---------- 悬浮按钮 ---------- */
.fab { position: fixed; right: 16px; bottom: calc(var(--tabh) + 16px); z-index: 35;
  width: 52px; height: 52px; border-radius: 50%; border: 0; background: var(--purple); color: #fff;
  font-size: 26px; line-height: 1; box-shadow: 0 6px 20px rgba(108, 43, 217, .38); cursor: pointer; }

/* ---------- 弹层 ---------- */
.sheet-mask { position: fixed; inset: 0; z-index: 50; background: rgba(10, 8, 16, .45);
  display: flex; align-items: flex-end; justify-content: center; }
.sheet { width: 100%; max-width: 720px; max-height: 88vh; overflow-y: auto; background: var(--card);
  border-radius: 20px 20px 0 0; padding: 6px 16px calc(20px + env(safe-area-inset-bottom));
  animation: up .22s cubic-bezier(.2, .8, .2, 1); }
@keyframes up { from { transform: translateY(24px); opacity: .6 } to { transform: translateY(0); opacity: 1 } }
.sheet .grab { width: 38px; height: 4px; border-radius: 99px; background: var(--line); margin: 8px auto 12px; }
.sheet h3 { margin: 0 0 4px; font-size: 17px; }
.sheet .hint { font-size: 12.5px; color: var(--fg3); margin: 0 0 14px; }
.field { margin-bottom: 13px; }
.field label { display: block; font-size: 12.5px; color: var(--fg2); font-weight: 600; margin-bottom: 5px; }
.field input, .field textarea, .field select {
  width: 100%; border: 1px solid var(--line); border-radius: 11px; padding: 10px 12px;
  background: var(--bg); font-size: 14.5px; }
.field textarea { min-height: 88px; resize: vertical; }
.field .hint { font-size: 11.5px; color: var(--fg3); margin-top: 4px; }
.grid2 { display: flex; gap: 10px; }
.grid2 > * { flex: 1; min-width: 0; }
.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg button { border: 1px solid var(--line); background: var(--bg); border-radius: 9px; padding: 7px 11px;
  font-size: 13px; cursor: pointer; color: var(--fg2); }
.seg button.on { border-color: var(--purple); background: var(--purple-t); color: var(--purple); font-weight: 600; }

/* ---------- 我的 ---------- */
.rowline { display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 13px 15px; border-bottom: 1px solid var(--line); }
.rowline:last-child { border-bottom: 0; }
.rowline .k { font-size: 14px; }
.rowline .v { font-size: 13.5px; color: var(--fg2); }
.stats { display: flex; gap: 10px; }
.stat-card { flex: 1; background: var(--card); border-radius: 14px; box-shadow: var(--shadow);
  padding: 13px; text-align: center; }
.stat-card b { display: block; font-size: 22px; color: var(--purple); }
.stat-card span { font-size: 11.5px; color: var(--fg2); }

/* ---------- 提示 ---------- */
.toast { position: fixed; left: 50%; bottom: calc(var(--tabh) + 26px); transform: translateX(-50%);
  background: rgba(20, 18, 26, .92); color: #fff; padding: 9px 16px; border-radius: 999px;
  font-size: 13.5px; z-index: 90; animation: up .18s; max-width: 84vw; text-align: center; }
.notice-banner { background: var(--warn-t); color: var(--warn); font-size: 12px; padding: 8px 14px;
  border-radius: 10px; margin-bottom: 12px; line-height: 1.5; }

/* ============================================================
   v2 新增组件
   ============================================================ */

/* ---------- 进门 ---------- */
.gate-card { background: var(--card); border-radius: 20px; box-shadow: var(--shadow);
  padding: 26px 20px 22px; margin-top: 6px; text-align: center; }
.gate-ic { font-size: 40px; line-height: 1; margin-bottom: 10px; }
.gate-card h2 { margin: 0 0 8px; font-size: 20px; }
.gate-sub { font-size: 13.5px; color: var(--fg2); line-height: 1.65; margin: 0 0 20px; }
.gate-card .field { text-align: left; }
.gate-card .field input { text-align: center; font-size: 17px; letter-spacing: 2px; padding: 13px; }
.gate-note { font-size: 12px; color: var(--fg3); margin: 14px 0 0; }
.gate-or { display: flex; align-items: center; gap: 10px; color: var(--fg3); font-size: 12px; margin: 18px 0 10px; }
.gate-or::before, .gate-or::after { content: ''; flex: 1; height: 1px; background: var(--line); }
.mycode { font: 700 34px/1 ui-monospace, "SF Mono", Consolas, monospace; letter-spacing: 8px;
  text-align: center; color: var(--purple); background: var(--purple-t); border-radius: 14px;
  padding: 20px 10px 20px 18px; margin: 14px 0 18px; user-select: all; }
.sheet.gate { max-width: 460px; border-radius: 20px; margin: auto; align-self: center; }

/* ---------- 作者署名行 ---------- */
.byline { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--fg3); margin-top: 8px; }
.av-xs { width: 18px; height: 18px; border-radius: 50%; background: var(--purple-t); color: var(--purple);
  display: inline-grid; place-items: center; font-size: 10.5px; font-weight: 600; flex: 0 0 auto; }
.chip.班委 { background: #FDF3E0; color: var(--warn); }
.chip.职务 { background: #FDF3E0; color: var(--warn); }
@media (prefers-color-scheme: dark) { .chip.班委, .chip.职务 { background: #33260C; } }

/* ---------- 统一互动条 ---------- */
.rx-bar { display: flex; flex-wrap: wrap; gap: 6px; padding: 8px 12px; border-top: 1px solid var(--line); }
.rx-bar button { border: 1px solid var(--line); background: var(--card); border-radius: 999px;
  padding: 4px 10px; font-size: 12.5px; cursor: pointer; color: var(--fg2); display: inline-flex; align-items: center; gap: 4px; }
.rx-bar button span { font-size: 11.5px; }
.rx-bar button b { font-weight: 700; color: var(--fg); }
.rx-bar button.on { border-color: var(--purple); background: var(--purple-t); color: var(--purple); font-weight: 600; }
.rx-bar button.on b { color: var(--purple); }

/* ---------- 小按钮 ---------- */
.mini { border: 1px solid var(--line); background: var(--card); border-radius: 8px; padding: 3px 9px;
  font-size: 12px; cursor: pointer; color: var(--fg2); }
.mini.on { border-color: var(--purple); background: var(--purple-t); color: var(--purple); font-weight: 600; }
.mini.ok { border-color: var(--ok); color: var(--ok); font-weight: 600; }

/* ---------- 标签（可点） ---------- */
.tag.on { border-color: var(--purple); background: var(--purple-t); color: var(--purple); font-weight: 600; }
.tagrow .tag { cursor: pointer; }

/* ---------- 点子 ---------- */
.idea { border: 1px solid var(--line); border-radius: 13px; padding: 11px 12px; margin-bottom: 9px; }
.idea.decided { border-color: var(--ok); background: var(--ok-t); }
.idea-head { display: flex; gap: 8px; align-items: flex-start; }
.idea-rank { font-size: 13px; font-weight: 700; color: var(--fg3); flex: 0 0 auto; min-width: 22px; padding-top: 1px; }
.idea-body { flex: 1; font-size: 14.5px; line-height: 1.5; white-space: pre-wrap; word-break: break-word; }
.idea-foot { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 9px; padding-left: 30px; }
.idea-foot .mini { padding: 3px 8px; }
.decided-box { margin-top: 10px; background: var(--ok-t); border-radius: 10px; padding: 9px 11px;
  font-size: 13.5px; color: var(--ok); line-height: 1.5; }

/* ---------- 「需要谁点收到」选择器 ---------- */
.ackbar { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.ackbar .mini { padding: 2px 8px; }
.picklist { max-height: 240px; overflow-y: auto; border: 1px solid var(--line); border-radius: 11px;
  background: var(--bg); padding: 4px 6px; }
.pickrow { display: flex; align-items: center; gap: 9px; padding: 9px 8px; border-radius: 9px; cursor: pointer; }
.pickrow:active { background: rgba(108, 43, 217, .06); }
.pickrow input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--purple); flex: 0 0 auto; }
.pk-name { flex: 1; font-size: 14.5px; }
.pk-tags { display: flex; gap: 4px; flex-wrap: wrap; }
.act.muted { color: var(--fg3); cursor: default; }
.chip.指定 { background: #EEE9FE; color: var(--purple); }
@media (prefers-color-scheme: dark) { .chip.指定 { background: #2A2140; } }