/* ==========================================================
   班级事务管理平台 · 样式表
   移动端优先；>=900px 切换为左侧栏布局
   ========================================================== */
:root{
  --brand:#2563eb;
  --brand-dark:#1d4ed8;
  --brand-soft:#eff6ff;
  --green:#16a34a;
  --green-soft:#f0fdf4;
  --amber:#d97706;
  --amber-soft:#fffbeb;
  --red:#dc2626;
  --red-soft:#fef2f2;
  --purple:#7c3aed;
  --purple-soft:#f5f3ff;

  --bg:#f4f6fa;
  --card:#ffffff;
  --text:#1f2430;
  --text-2:#5b6478;
  --text-3:#939cad;
  --line:#e6e9f0;
  --line-2:#f0f2f7;

  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(16,24,40,.04), 0 4px 16px rgba(16,24,40,.06);
  --shadow-lg:0 8px 32px rgba(16,24,40,.12);
  --tabbar-h:60px;
  --safe-b:env(safe-area-inset-bottom, 0px);
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:15px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overscroll-behavior-y:none;
}
h1,h2,h3,h4,p{margin:0}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:16px;color:var(--text)}
a{color:var(--brand);text-decoration:none}
.hidden{display:none !important}
.muted{color:var(--text-3);font-weight:400}
.mono{font-variant-numeric:tabular-nums}

/* ---------- 启动遮罩 ---------- */
.boot-mask{position:fixed;inset:0;background:linear-gradient(160deg,#2563eb,#1e40af);display:flex;align-items:center;justify-content:center;z-index:9999;color:#fff}
.boot-card{text-align:center}
.boot-logo{width:64px;height:64px;border-radius:20px;background:rgba(255,255,255,.18);display:flex;align-items:center;justify-content:center;font-size:30px;font-weight:700;margin:0 auto 16px;backdrop-filter:blur(6px)}
.boot-logo.big{width:76px;height:76px;font-size:34px}
.boot-logo.sm{width:36px;height:36px;font-size:18px;border-radius:11px;margin:0;background:linear-gradient(135deg,#2563eb,#3b82f6)}
.boot-title{font-size:17px;font-weight:600}
.boot-sub{font-size:13px;opacity:.75;margin-top:6px}

/* ---------- 登录 ---------- */
.login-wrap{position:fixed;inset:0;background:linear-gradient(170deg,#eaf1ff 0%,#f4f6fa 46%);overflow-y:auto;z-index:900;display:flex;align-items:flex-start;justify-content:center;padding:24px 16px 40px}
.login-card{width:100%;max-width:400px;margin-top:6vh}
.login-head{text-align:center;margin-bottom:22px}
.login-head h1{font-size:21px;font-weight:700;letter-spacing:.5px}
.login-head p{color:var(--text-3);font-size:13px;margin-top:6px}
.login-card form{background:var(--card);border-radius:18px;padding:20px 18px;box-shadow:var(--shadow)}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:6px;font-weight:500}
.field input,.field textarea,.field select{
  width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:#fbfcfe;outline:none;transition:border-color .15s,background .15s;
}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--brand);background:#fff}
.field textarea{min-height:96px;resize:vertical;line-height:1.6}
.field-row{display:flex;gap:10px}
.field-row>*{flex:1;min-width:0}
.login-tip{font-size:12.5px;color:var(--red);margin-top:10px;min-height:16px;text-align:center}
.login-foot{text-align:center;margin-top:16px}

/* ---------- 布局 ---------- */
.app{min-height:100vh}
.sidebar{display:none}
.main{min-height:100vh;padding-bottom:calc(var(--tabbar-h) + var(--safe-b) + 10px)}
.topbar{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);padding:12px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.topbar h2{font-size:17px;font-weight:650;letter-spacing:.3px}
.tb-right{display:flex;align-items:center;gap:10px}
.sync-dot{width:8px;height:8px;border-radius:50%;background:var(--green);display:inline-block}
.sync-dot.off{background:var(--text-3)}
.sync-dot.err{background:var(--red)}
.avatar-me{
  width:34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;flex:none;
}
.view{padding:14px 14px 20px;max-width:860px;margin:0 auto}

/* ---------- 底部 Tab ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);
  border-top:1px solid var(--line);display:flex;padding-bottom:var(--safe-b);height:calc(var(--tabbar-h) + var(--safe-b));
}
.tab-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;color:var(--text-3);font-size:11px;transition:color .15s}
.tab-item .ti{font-size:20px;line-height:1;display:block}
.tab-item.on{color:var(--brand);font-weight:600}

/* ---------- 卡片 / 通用块 ---------- */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px;margin-bottom:12px}
.card.tight{padding:12px}
.card-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.card-title h3{font-size:15px;font-weight:650}
.sec-title{font-size:13px;color:var(--text-3);font-weight:600;margin:18px 2px 8px;letter-spacing:.5px}
.sec-title:first-child{margin-top:4px}
.divider{height:1px;background:var(--line-2);margin:12px 0}
.empty{text-align:center;color:var(--text-3);font-size:13.5px;padding:26px 10px;line-height:1.8}
.empty .ei{font-size:32px;display:block;margin-bottom:8px;opacity:.5}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 16px;border-radius:10px;font-size:14px;font-weight:500;
  background:#f1f3f8;color:var(--text);transition:transform .08s,opacity .15s,background .15s;border:1px solid transparent;
}
.btn:active{transform:scale(.97)}
.btn.primary{background:var(--brand);color:#fff}
.btn.primary:active{background:var(--brand-dark)}
.btn.danger{background:var(--red-soft);color:var(--red)}
.btn.green{background:var(--green-soft);color:var(--green)}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--text-2)}
.btn.sm{padding:6px 11px;font-size:13px;border-radius:8px}
.btn.block{width:100%;display:flex}
.btn:disabled{opacity:.5;pointer-events:none}
.icon-btn{width:30px;height:30px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;color:var(--text-3);font-size:16px}
.icon-btn:active{background:var(--line-2)}
.link-btn{color:var(--brand);font-size:13px;background:none;padding:4px}
.fab{
  position:fixed;right:16px;bottom:calc(var(--tabbar-h) + var(--safe-b) + 16px);z-index:55;
  width:52px;height:52px;border-radius:50%;background:var(--brand);color:#fff;font-size:26px;font-weight:300;
  box-shadow:0 6px 20px rgba(37,99,235,.4);display:flex;align-items:center;justify-content:center;
}
.fab:active{transform:scale(.94)}

/* ---------- 二级 Tab ---------- */
.subtabs{display:flex;gap:6px;overflow-x:auto;padding:2px 0 10px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.subtabs::-webkit-scrollbar{display:none}
.subtab{flex:none;padding:7px 14px;border-radius:20px;background:var(--card);color:var(--text-2);font-size:13.5px;border:1px solid var(--line);white-space:nowrap}
.subtab.on{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:500}

/* ---------- 列表项 ---------- */
.item{display:flex;gap:11px;padding:12px 0;border-bottom:1px solid var(--line-2)}
.item:last-child{border-bottom:none}
.item:first-child{padding-top:2px}
.item-ico{width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:18px;flex:none;background:var(--brand-soft)}
.item-main{flex:1;min-width:0}
.item-t{font-size:14.5px;font-weight:600;line-height:1.45;word-break:break-word}
.item-d{font-size:13px;color:var(--text-2);margin-top:3px;word-break:break-word;white-space:pre-wrap}
.item-m{font-size:12px;color:var(--text-3);margin-top:5px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.item-side{display:flex;flex-direction:column;align-items:flex-end;gap:6px;flex:none}

/* ---------- 徽章 ---------- */
.badge{display:inline-block;padding:1px 8px;border-radius:20px;font-size:11.5px;font-weight:600;line-height:1.7}
.b-blue{background:var(--brand-soft);color:var(--brand)}
.b-green{background:var(--green-soft);color:var(--green)}
.b-amber{background:var(--amber-soft);color:var(--amber)}
.b-red{background:var(--red-soft);color:var(--red)}
.b-purple{background:var(--purple-soft);color:var(--purple)}
.b-gray{background:#f1f3f8;color:var(--text-2)}

/* ---------- 首页卡片 ---------- */
.hero{background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;border-radius:16px;padding:16px 16px 14px;margin-bottom:12px;box-shadow:0 6px 20px rgba(37,99,235,.22)}
.hero .h-name{font-size:16px;font-weight:650}
.hero .h-sub{font-size:12.5px;opacity:.85;margin-top:2px}
.hero-stats{display:flex;margin-top:14px;gap:8px}
.hstat{flex:1;background:rgba(255,255,255,.16);border-radius:11px;padding:9px 8px;text-align:center}
.hstat b{display:block;font-size:19px;font-weight:700;line-height:1.2}
.hstat span{font-size:11.5px;opacity:.85}

.quick{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:12px}
.qi{background:var(--card);border-radius:12px;padding:11px 4px;text-align:center;box-shadow:var(--shadow)}
.qi .qi-ico{font-size:21px;line-height:1.2}
.qi .qi-t{font-size:11.5px;color:var(--text-2);margin-top:4px}

.duty-today{display:flex;gap:8px;flex-wrap:wrap}
.duty-chip{background:var(--brand-soft);color:var(--brand);border-radius:9px;padding:5px 11px;font-size:13px;font-weight:500}

/* ---------- 统计条 ---------- */
.stat-row{display:flex;gap:10px;margin-bottom:12px}
.stat{flex:1;background:var(--card);border-radius:12px;padding:12px 10px;box-shadow:var(--shadow);text-align:center}
.stat b{display:block;font-size:20px;font-weight:700;line-height:1.25}
.stat span{font-size:11.5px;color:var(--text-3)}

/* ---------- 进度条 ---------- */
.bar{height:6px;border-radius:4px;background:var(--line-2);overflow:hidden;margin-top:8px}
.bar>i{display:block;height:100%;background:var(--brand);border-radius:4px;transition:width .3s}

/* ---------- 表单行 ---------- */
.form-grid{display:grid;gap:12px}
.kv{display:flex;justify-content:space-between;gap:10px;font-size:14px;padding:7px 0;border-bottom:1px solid var(--line-2)}
.kv:last-child{border-bottom:none}
.kv .k{color:var(--text-2);flex:none}
.kv .v{text-align:right;word-break:break-all}

/* ---------- 弹层 ---------- */
.modal-root{position:fixed;inset:0;z-index:800;display:flex;align-items:flex-end;justify-content:center}
.modal-mask{position:absolute;inset:0;background:rgba(16,24,40,.45);animation:fade .18s ease}
.modal-panel{
  position:relative;width:100%;max-width:520px;background:var(--card);border-radius:18px 18px 0 0;
  max-height:88vh;display:flex;flex-direction:column;animation:up .22s cubic-bezier(.2,.8,.3,1);
  padding-bottom:var(--safe-b);
}
@keyframes up{from{transform:translateY(30px);opacity:.5}to{transform:translateY(0);opacity:1}}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal-head{padding:14px 16px 10px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line-2)}
.modal-head h3{font-size:16px;font-weight:650}
.modal-body{padding:14px 16px;overflow-y:auto;flex:1;-webkit-overflow-scrolling:touch}
.modal-foot{padding:10px 16px 14px;display:flex;gap:10px;border-top:1px solid var(--line-2)}
.modal-foot .btn{flex:1}
.modal-foot:empty{display:none}

/* ---------- Toast ---------- */
.toast-root{position:fixed;left:0;right:0;top:14px;z-index:2000;display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none}
.toast{background:rgba(23,28,40,.92);color:#fff;padding:9px 16px;border-radius:20px;font-size:13.5px;animation:tin .2s ease;max-width:80%;text-align:center}
@keyframes tin{from{transform:translateY(-8px);opacity:0}to{transform:translateY(0);opacity:1}}

/* ---------- 成员网格 ---------- */
.member-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:8px}
.member{background:var(--card);border-radius:12px;padding:11px 6px;text-align:center;box-shadow:var(--shadow)}
.member .m-av{width:40px;height:40px;border-radius:50%;margin:0 auto 6px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:15px}
.member .m-n{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.member .m-r{font-size:11px;color:var(--text-3);margin-top:2px}

/* ---------- 评论 ---------- */
.reply{display:flex;gap:9px;padding:9px 0;border-top:1px solid var(--line-2)}
.reply .r-av{width:28px;height:28px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px;font-weight:600}
.reply .r-b{flex:1;min-width:0}
.reply .r-h{font-size:12.5px;color:var(--text-3);display:flex;gap:6px;align-items:center}
.reply .r-t{font-size:14px;margin-top:2px;word-break:break-word;white-space:pre-wrap}

/* ---------- 桌面端 ---------- */
@media(min-width:900px){
  .app{display:flex}
  .sidebar{
    display:flex;flex-direction:column;width:212px;flex:none;background:#fff;border-right:1px solid var(--line);
    height:100vh;position:sticky;top:0;padding:16px 12px;
  }
  .sb-brand{display:flex;align-items:center;gap:10px;padding:0 6px 16px;border-bottom:1px solid var(--line-2)}
  .sb-brand-text b{display:block;font-size:14px}
  .mode-tag{font-size:11px;padding:1px 7px;border-radius:20px;background:var(--green-soft);color:var(--green);display:inline-block;margin-top:2px}
  .mode-tag.cloud{background:var(--brand-soft);color:var(--brand)}
  .sb-nav{flex:1;padding-top:12px;display:flex;flex-direction:column;gap:2px}
  .sb-nav .nav-item{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:10px;color:var(--text-2);font-size:14px;transition:background .15s}
  .sb-nav .nav-item .ni{font-size:17px;width:20px;text-align:center}
  .sb-nav .nav-item:hover{background:#f5f7fb}
  .sb-nav .nav-item.on{background:var(--brand-soft);color:var(--brand);font-weight:600}
  .sb-foot{padding-top:10px;border-top:1px solid var(--line-2)}
  .main{flex:1;min-width:0;padding-bottom:30px}
  .topbar{padding:14px 26px}
  .topbar h2{font-size:19px}
  .view{padding:18px 26px 40px;max-width:960px;margin:0 auto}
  .tabbar{display:none}
  .fab{bottom:28px;right:28px}
  .modal-root{align-items:center}
  .modal-panel{border-radius:16px;max-height:82vh}
  .quick{grid-template-columns:repeat(4,1fr)}
  .login-card{margin-top:8vh}
}
@media(max-width:359px){
  .quick{grid-template-columns:repeat(4,1fr)}
  .qi .qi-t{font-size:10.5px}
}