/* SECTION: style 校园风：蓝绿暖色、圆角卡片、移动优先 */
.grow{flex:1;min-width:0}
:root{
  --bg:#f2f7f5; --card:#fff; --ink:#1f3a3d; --ink2:#5b7176;
  --teal:#0e8f7e; --teal-dark:#0a6f62; --teal-soft:#e2f3ef;
  --blue:#2f6fed; --blue-soft:#e8effd;
  --orange:#f2913b; --orange-soft:#fdeedd;
  --green:#2fa35d; --green-soft:#e5f5e9; --red:#d9534f; --line:#dfe9e6;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.6}
a{color:var(--teal-dark)}
.top{display:flex;align-items:center;gap:14px;padding:12px 18px;background:linear-gradient(135deg,var(--teal),#4cc2ab);color:#fff;position:sticky;top:0;z-index:9}
.brand{color:#fff;font-weight:700;font-size:16px;text-decoration:none}
.top nav{margin-left:auto;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.top nav a{color:rgba(255,255,255,.85);text-decoration:none;font-size:14px;padding:4px 8px;border-radius:8px}
.top nav a.on{background:rgba(255,255,255,.25);color:#fff;font-weight:600}
.top .who{font-size:12.5px;background:rgba(255,255,255,.2);padding:3px 10px;border-radius:999px}
.wrap{max-width:860px;margin:0 auto;padding:18px 16px 60px}
.narrow{max-width:440px;margin:30px auto}
.card{background:var(--card);border-radius:16px;box-shadow:0 2px 10px rgba(31,58,61,.07);padding:20px;margin-bottom:16px}
.card h3{margin:0 0 14px;font-size:16px;display:flex;align-items:center}
.hdot{width:9px;height:9px;border-radius:50%;background:var(--teal);margin-right:9px;display:inline-block}
.hdot.orange{background:var(--orange)}.hdot.blue{background:var(--blue)}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--ink2);margin-bottom:6px;font-weight:600}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.input{width:100%;padding:10px 12px;border:1.5px solid var(--line);border-radius:12px;background:#fbfdfc;font-size:14px}
textarea.input{min-height:110px;resize:vertical}
input.file{padding:8px}
.fsel{font-size:12.5px;color:var(--teal-dark);margin-top:6px}
.btn{display:inline-block;padding:11px 22px;border-radius:12px;font-size:14px;font-weight:600;border:none;cursor:pointer;text-decoration:none;text-align:center}
.btn-primary{background:var(--teal);color:#fff}
.btn-blue{background:var(--blue);color:#fff}
.btn-orange{background:var(--orange);color:#fff}
.btn-ghost{background:#fff;border:1.5px solid var(--line);color:var(--ink2)}
.btn-block{width:100%}
.flash{border-radius:12px;padding:11px 14px;font-size:13.5px;margin-bottom:14px;background:var(--green-soft);color:var(--green)}
.flash.err{background:#fdecea;color:var(--red)}
.tip{font-size:13px;color:var(--ink2)}
.tag{display:inline-block;font-size:11.5px;padding:2px 9px;border-radius:999px;font-weight:600;margin-right:5px}
.tag-stu{background:var(--blue-soft);color:var(--blue)}
.tag-subj{background:var(--orange-soft);color:#b06714}
.tag-date{background:var(--green-soft);color:var(--green)}
.tag-new{background:var(--orange-soft);color:#b06714}
.tag-read{background:var(--green-soft);color:var(--green)}
.meta{font-size:12.5px;color:var(--ink2);margin-top:4px}
.meta.remark{color:#b06714}
.hw-item{background:#fff;border-radius:14px;padding:14px;margin-bottom:10px;box-shadow:0 1px 6px rgba(31,58,61,.05)}
.student .hw-item,.card .hw-item{background:#fbfdfc}
.row-item{display:flex;gap:12px;align-items:flex-start}
.ck input{width:18px;height:18px;accent-color:var(--blue);margin-top:4px}
.hw-text{font-size:13.5px;margin-top:6px}
.hw-files{margin-top:6px}
.fchip{display:inline-block;font-size:12px;background:#f1f5f4;border-radius:8px;padding:4px 10px;margin-right:8px;text-decoration:none;color:var(--teal-dark)}
.notice{border-left:4px solid var(--orange);background:#fbfdfc;border-radius:10px;padding:12px;margin-bottom:10px}
.notice.new{border-color:var(--orange);background:var(--orange-soft)}
.notice:not(.new){border-color:var(--green)}
.notice-text{font-size:14px;margin-top:6px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:16px}
.stat{background:#fff;border-radius:14px;padding:14px;text-align:center;box-shadow:0 1px 6px rgba(31,58,61,.05)}
.stat .num{font-size:22px;font-weight:700;color:var(--teal-dark)}
.stat .lbl{font-size:12px;color:var(--ink2)}
.flt-row{display:flex;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.flt-row .input{width:auto;flex:1;min-width:120px}
.zip-bar{display:flex;gap:12px;align-items:center;background:#fff;border-radius:14px;box-shadow:0 -2px 14px rgba(31,58,61,.1);padding:12px 16px;position:sticky;bottom:10px;flex-wrap:wrap;font-size:13.5px;color:var(--ink2)}
.zip-bar b{color:var(--blue);font-size:16px}
.zip-bar .btn{margin-left:6px}
.hint{font-size:12px;color:var(--ink2);background:#f1f5f4;border-radius:10px;padding:8px 12px;margin-top:12px;line-height:1.6}
.hint code{background:#fff;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:11.5px;color:var(--teal-dark)}
.empty{text-align:center;color:var(--ink2);padding:34px 10px;font-size:13.5px}
.user-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:8px 0;border-bottom:1px dashed #e3ece9;font-size:13.5px}
.user-acts{display:flex;gap:6px;flex-wrap:wrap}
.tag-off{color:#d9534f;font-weight:700}
.tab-row{display:flex;gap:8px;flex-wrap:wrap}
.tab-btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:7px 16px;font-size:14px;cursor:pointer;color:var(--ink2)}
.tab-btn.on{background:var(--teal);border-color:var(--teal);color:#fff;font-weight:700}
.chk{display:flex;align-items:center;gap:8px;font-size:14.5px;margin-top:12px}
.ops{display:flex;flex-direction:column;gap:6px}
.mini{font-size:12.5px;color:var(--teal-dark);background:var(--teal-soft);border:none;border-radius:8px;padding:5px 11px;cursor:pointer;text-decoration:none}
.mini.del{background:#fdecea;color:var(--red)}
details summary{cursor:pointer}
.f-row{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.f-row label{width:110px;font-size:13.5px;color:var(--ink2)}
.f-row input{flex:1;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;font-size:14px}
@media(max-width:640px){
  .field-row{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .zip-bar .btn{flex:1}
}