/* ============ 瓯外科学智批助手 ============ */
:root{
  --primary:#3b82f6;
  --primary-deep:#2563eb;
  --primary-soft:#eff6ff;
  --rose:#f43f5e;
  --rose-soft:#fff1f2;
  --amber:#f59e0b;
  --green:#10b981;
  --bg:#f1f5f9;
  --card:#ffffff;
  --line:#e2e8f0;
  --t1:#0f172a;
  --t2:#475569;
  --t3:#94a3b8;
  --r-lg:1.5rem;
  --r-md:1rem;
  --shadow:0 1px 3px rgba(15,23,42,.06),0 4px 16px rgba(15,23,42,.05);
  --shadow-lg:0 8px 30px rgba(37,99,235,.16);
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{font-size:16px}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--t1);min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
#app{max-width:520px;margin:0 auto;min-height:100vh;position:relative;background:var(--bg)}
button{font-family:inherit;border:none;cursor:pointer;background:none}
input,textarea,select{font-family:inherit;font-size:16px;border:none;outline:none;background:transparent;color:var(--t1)}
img{display:block;max-width:100%}

/* ---------- 通用 ---------- */
.page{padding:0 1.25rem 6.5rem;animation:fadeIn .25s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.card{background:var(--card);border-radius:var(--r-lg);box-shadow:var(--shadow)}
.sec-title{display:flex;align-items:center;gap:.55rem;margin:1.6rem 0 .9rem}
.sec-title .bar{width:.22rem;height:1.35rem;border-radius:99px;background:var(--primary)}
.sec-title h2{font-size:1.15rem;font-weight:700}
.sec-title .more{margin-left:auto;color:var(--primary);font-size:.9rem;font-weight:500}
.btn{display:flex;align-items:center;justify-content:center;gap:.45rem;width:100%;
  padding:.95rem;border-radius:1rem;font-size:1.05rem;font-weight:700;
  background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(59,130,246,.35);
  transition:transform .12s,box-shadow .12s}
.btn:active{transform:translateY(2px);box-shadow:0 1px 4px rgba(59,130,246,.3)}
.btn[disabled]{background:#cbd5e1;box-shadow:none;color:#fff;cursor:not-allowed}
.btn-ghost{background:#f1f5f9;color:var(--t2);box-shadow:none}
.chip{display:inline-flex;align-items:center;gap:.3rem;padding:.4rem .9rem;border-radius:99px;
  background:#f1f5f9;color:var(--t2);font-size:.9rem;font-weight:500;border:1px solid transparent}
.chip.on{background:var(--primary-soft);color:var(--primary);border-color:#bfdbfe;font-weight:700}
.empty{display:flex;flex-direction:column;align-items:center;gap:.8rem;padding:3rem 1rem;color:var(--t3)}
.empty svg{width:3.2rem;height:3.2rem;stroke:#cbd5e1}
.empty p{font-size:.95rem}
.spin{width:1.5rem;height:1.5rem;border:3px solid #dbeafe;border-top-color:var(--primary);
  border-radius:50%;animation:rot .8s linear infinite}
@keyframes rot{to{transform:rotate(360deg)}}
.loading-box{display:flex;flex-direction:column;align-items:center;gap:1rem;padding:4rem 0;color:var(--t3)}

/* ---------- Toast / Modal ---------- */
#toast-wrap{position:fixed;top:calc(env(safe-area-inset-top,0px) + 1.2rem);left:0;right:0;
  display:flex;flex-direction:column;align-items:center;gap:.5rem;z-index:999;pointer-events:none}
.toast{max-width:82%;background:rgba(15,23,42,.88);color:#fff;padding:.65rem 1.1rem;
  border-radius:.9rem;font-size:.9rem;animation:toastIn .25s ease;line-height:1.45}
.toast.ok{background:rgba(16,185,129,.92)}
.toast.err{background:rgba(244,63,94,.92)}
@keyframes toastIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}
.modal-mask{position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:900;
  display:flex;align-items:center;justify-content:center;padding:1.6rem;animation:fadeIn .18s ease}
.modal{background:#fff;border-radius:1.4rem;padding:1.6rem;width:100%;max-width:340px;
  display:flex;flex-direction:column;gap:1rem}
.modal h3{font-size:1.1rem;text-align:center}
.modal input{background:#f1f5f9;border-radius:.8rem;padding:.8rem 1rem;width:100%}
.modal .row{display:flex;gap:.7rem}
.modal .row button{flex:1;padding:.75rem;border-radius:.8rem;font-weight:600;font-size:.95rem}
.m-cancel{background:#f1f5f9;color:var(--t2)}
.m-ok{background:var(--primary);color:#fff}

/* ---------- 登录页 ---------- */
.login-page{min-height:100vh;display:flex;flex-direction:column;padding:1.6rem 1.6rem 1rem;box-sizing:border-box;overflow-y:auto}
.login-hero{display:flex;flex-direction:column;align-items:center;margin-bottom:1.1rem}
.login-logo{width:4.3rem;height:4.3rem;border-radius:1.4rem;background:linear-gradient(135deg,#60a5fa,#2563eb);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);margin-bottom:.85rem}
.login-logo svg{width:2.3rem;height:2.3rem;stroke:#fff}
.login-hero h1{font-size:1.45rem;font-weight:800;letter-spacing:.02em}
.login-hero p{color:var(--t3);margin-top:.35rem;font-size:.9rem;letter-spacing:.14em}
.login-card{padding:1.2rem;display:flex;flex-direction:column;gap:.8rem}
.login-tabs{display:flex;background:#f1f5f9;border-radius:.9rem;padding:.28rem}
.login-tabs button{flex:1;padding:.6rem .2rem;border-radius:.72rem;font-size:.88rem;font-weight:600;color:var(--t3);white-space:nowrap}
.login-tabs button.on{background:#fff;color:var(--primary);box-shadow:0 1px 4px rgba(15,23,42,.08)}
.field label{display:block;font-size:.88rem;font-weight:600;color:var(--t2);margin:0 0 .4rem .2rem}
.input-row{display:flex;align-items:center;background:#f8fafc;border:1px solid var(--line);
  border-radius:.95rem;padding:.15rem .3rem}
.input-row:focus-within{border-color:#93c5fd;background:#fff}
.input-row input{flex:1;padding:.8rem .7rem}
.input-row .code-btn{flex-shrink:0;margin:.35rem .45rem .35rem 0;padding:.5rem .8rem;border-radius:.65rem;
  background:var(--primary-soft);color:var(--primary);font-size:.85rem;font-weight:600;min-width:6.4rem;text-align:center}
.input-row .code-btn[disabled]{color:var(--t3);background:#f1f5f9}
.login-divider{display:flex;align-items:center;gap:.7rem;color:var(--t3);font-size:.8rem;letter-spacing:.06em}
.login-divider::before,.login-divider::after{content:"";flex:1;height:1px;background:var(--line)}
.login-links{display:flex;justify-content:flex-end;font-size:.88rem;padding-top:.3rem}
.login-links span{color:var(--primary);font-weight:600;cursor:pointer}
.btn-wechat{background:#07C160;box-shadow:0 4px 14px rgba(7,193,96,.32);padding:.85rem}
.btn-wechat svg{width:1.25rem;height:1.25rem}
.login-switch{text-align:center;font-size:.88rem;color:var(--t3);line-height:1.6}
.login-switch b{color:var(--primary);font-weight:600;cursor:pointer}
.agree-row{display:flex;align-items:center;justify-content:center;gap:.45rem;margin-top:auto;padding-top:1rem;
  font-size:.85rem;color:var(--t3)}
.agree-box{width:1.15rem;height:1.15rem;border-radius:.35rem;border:1.5px solid #cbd5e1;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;transition:.15s}
.agree-box.on{background:var(--primary);border-color:var(--primary)}
.agree-box svg{width:.75rem;height:.75rem;stroke:#fff}
.form-err{color:var(--rose);font-size:.85rem;padding-left:.2rem;min-height:1.1em}

/* ---------- 顶栏 / TabBar ---------- */
.topbar{position:sticky;top:0;z-index:50;background:rgba(241,245,249,.92);backdrop-filter:blur(10px);
  display:flex;align-items:center;justify-content:space-between;padding:1rem .2rem .6rem}
.topbar .tb-title{font-size:1.25rem;font-weight:800}
.topbar .tb-back{width:2.2rem;height:2.2rem;border-radius:50%;background:#fff;box-shadow:var(--shadow);
  display:flex;align-items:center;justify-content:center}
.topbar .tb-back svg{width:1.15rem;height:1.15rem;stroke:var(--t2)}
.topbar .tb-right{font-size:.9rem;color:var(--t3)}
.tabbar{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:520px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-top:1px solid var(--line);
  display:flex;padding:.45rem 0 calc(.45rem + env(safe-area-inset-bottom,0px));z-index:80}
.tabbar button{flex:1;display:flex;flex-direction:column;align-items:center;gap:.15rem;
  color:var(--t3);font-size:.72rem;font-weight:500;padding:.25rem 0}
.tabbar button svg{width:1.5rem;height:1.5rem;stroke:currentColor}
.tabbar button.on{color:var(--primary);font-weight:700}

/* ---------- 首页 ---------- */
.home-head{display:flex;align-items:center;gap:.9rem;padding:1.4rem .2rem 1.2rem}
.avatar-btn{width:3.4rem;height:3.4rem;border-radius:50%;background:linear-gradient(135deg,#93c5fd,#3b82f6);
  color:#fff;font-size:1.25rem;font-weight:700;display:flex;align-items:center;justify-content:center;
  flex-shrink:0;box-shadow:var(--shadow)}
.home-head .hi{flex:1;min-width:0}
.home-head .hi h1{font-size:1.3rem;font-weight:800}
.home-head .hi p{color:var(--t3);font-size:.9rem;margin-top:.15rem}
.quick-card{padding:1.3rem;display:flex;flex-direction:column;gap:1.1rem}
.sel-grid{display:grid;grid-template-columns:1fr 1fr;gap:.85rem}
.sel-box label{display:block;font-size:.85rem;color:var(--t2);margin-bottom:.45rem;font-weight:500}
.sel-pick{display:flex;align-items:center;justify-content:space-between;background:#f8fafc;
  border:1px solid var(--line);border-radius:1rem;padding:.85rem .95rem;font-size:.98rem;color:var(--t1)}
.sel-pick.hint{color:var(--t3)}
.sel-pick svg{width:1.05rem;height:1.05rem;stroke:var(--t3);flex-shrink:0;margin-left:.3rem}
.sel-pick.disabled{opacity:.55}
.duo-grid{display:grid;grid-template-columns:1fr 1fr;gap:.9rem;margin:1.1rem 0 .2rem}
.duo{background:#fff;border-radius:var(--r-lg);box-shadow:var(--shadow);padding:1.15rem .5rem;
  display:flex;flex-direction:column;align-items:center;gap:.55rem;font-size:.95rem;font-weight:600;color:var(--t2)}
.duo .ico{width:2.9rem;height:2.9rem;border-radius:.95rem;display:flex;align-items:center;justify-content:center}
.duo .ico svg{width:1.5rem;height:1.5rem}
.duo .ico.amber{background:#fffbeb}.duo .ico.amber svg{stroke:#f59e0b}
.duo .ico.green{background:#ecfdf5}.duo .ico.green svg{stroke:#10b981}
.rec-item{background:#fff;border-radius:1.2rem;box-shadow:var(--shadow);padding:.85rem;
  display:flex;align-items:center;gap:.85rem;margin-bottom:.75rem;cursor:pointer}
.rec-thumb{width:3.6rem;height:3.6rem;border-radius:.9rem;object-fit:cover;background:#e2e8f0;flex-shrink:0}
.rec-main{flex:1;min-width:0}
.rec-top{display:flex;align-items:baseline;justify-content:space-between}
.rec-top b{font-size:1rem}
.rec-top span{font-size:.8rem;color:var(--t3)}
.rec-class{display:inline-block;background:var(--primary-soft);color:var(--primary);
  font-size:.72rem;font-weight:600;padding:.1rem .5rem;border-radius:.45rem;margin:.25rem 0}
.rec-cmt{font-size:.85rem;color:var(--t2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rec-arrow{width:1.05rem;height:1.05rem;stroke:#cbd5e1;flex-shrink:0}

/* ---------- 批改详情 ---------- */
.res-stu-card{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.2rem;margin-top:.9rem}
.res-stu-card .who b{font-size:1.15rem;font-weight:800}
.res-stu-card .who p{font-size:.85rem;color:var(--t3);margin-top:.15rem}
.date-pill{background:#f8fafc;border-radius:1rem;padding:.5rem .9rem;text-align:right}
.date-pill b{color:var(--primary);font-size:.98rem}
.date-pill span{display:block;font-size:.72rem;color:var(--t3);margin-top:.1rem}
.img-wrap{position:relative;border-radius:var(--r-lg);overflow:hidden;background:#0f172a;
  box-shadow:var(--shadow);margin-top:1rem;min-height:12rem}
.img-wrap img{width:100%}
.err-box{position:absolute;border:2.5px solid var(--rose);border-radius:4px;background:rgba(244,63,94,.12)}
.err-box .tag{position:absolute;top:-1.75rem;left:-2.5px;background:var(--rose);color:#fff;
  font-size:.72rem;font-weight:600;padding:.18rem .5rem;border-radius:.4rem;white-space:nowrap;max-width:180px;
  overflow:hidden;text-overflow:ellipsis}
.err-box .num{position:absolute;top:-.7rem;left:-.7rem;width:1.35rem;height:1.35rem;background:var(--rose);
  color:#fff;border-radius:50%;border:2px solid #fff;font-size:.72rem;font-weight:700;
  display:flex;align-items:center;justify-content:center}
.err-item{display:flex;gap:.7rem;background:rgba(255,241,242,.6);border:1px solid #ffe4e6;
  border-radius:1rem;padding:.9rem;margin-bottom:.7rem}
.err-item .n{width:1.5rem;height:1.5rem;border-radius:50%;background:var(--rose);color:#fff;
  font-size:.8rem;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:.1rem}
.err-item p{font-size:.95rem;color:#9f1239;line-height:1.6}
.comment-card{padding:1.1rem 1.2rem}
.comment-card textarea{width:100%;min-height:9rem;font-size:.98rem;line-height:1.75;color:var(--t2);resize:vertical}
.comment-card .cnt{text-align:right;font-size:.8rem;color:var(--t3)}
.ai-badge{display:inline-flex;align-items:center;gap:.3rem;font-size:.72rem;color:var(--primary);
  background:var(--primary-soft);padding:.15rem .55rem;border-radius:.5rem;font-weight:600}
.ai-badge svg{width:.85rem;height:.85rem;stroke:var(--primary)}
.bottom-bar{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:520px;
  display:flex;gap:.8rem;padding:.85rem 1.25rem calc(.85rem + env(safe-area-inset-bottom,0px));
  background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-top:1px solid var(--line);z-index:70}
.bottom-bar .btn{flex:1;padding:.85rem;font-size:1rem;border-radius:1.05rem}
.btn-plain{background:#f1f5f9;color:var(--t2);box-shadow:none;font-weight:600}
.ai-loading{min-height:70vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.6rem}
.ai-ring{position:relative;width:6rem;height:6rem}
.ai-ring .r1{position:absolute;inset:0;border:4px solid rgba(59,130,246,.18);border-radius:50%}
.ai-ring .r2{position:absolute;inset:0;border:4px solid transparent;border-top-color:var(--primary);
  border-radius:50%;animation:rot 1s linear infinite}
.ai-ring svg{position:absolute;inset:0;margin:auto;width:2.4rem;height:2.4rem;stroke:var(--primary)}
.ai-loading h2{font-size:1.25rem;font-weight:800}
.ai-loading p{color:var(--t3);font-size:.95rem;margin-top:-.8rem}
.ai-loading .step{font-size:.85rem;color:var(--primary);background:var(--primary-soft);
  padding:.35rem 1rem;border-radius:99px;animation:fadeIn .3s ease}

/* ---------- 历史 ---------- */
.hist-filter{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;padding:.2rem 0 .4rem}
.hist-count{margin-left:auto;font-size:.85rem;color:var(--t3)}
.hist-item{position:relative;display:flex;gap:.9rem;background:#fff;border-radius:1.2rem;
  box-shadow:var(--shadow);padding:.85rem;margin-bottom:.8rem;cursor:pointer;align-items:center}
.hist-thumb{width:4.4rem;height:4.4rem;border-radius:1rem;object-fit:cover;background:#e2e8f0;flex-shrink:0}
.err-badge{position:absolute;top:-.45rem;left:3.6rem;min-width:1.35rem;height:1.35rem;padding:0 .3rem;
  background:var(--rose);color:#fff;border-radius:99px;border:2px solid #fff;font-size:.68rem;font-weight:700;
  display:flex;align-items:center;justify-content:center}

/* ---------- 管理 ---------- */
.mg-tabs{display:flex;background:#fff;border-radius:1.1rem 1.1rem 0 0;box-shadow:var(--shadow);margin-top:.9rem;overflow:hidden}
.mg-tabs button{flex:1;padding:.95rem;font-size:1rem;font-weight:700;color:var(--t3);position:relative}
.mg-tabs button.on{color:var(--primary)}
.mg-tabs button.on::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);
  width:2.6rem;height:.22rem;border-radius:99px;background:var(--primary)}
.mg-body{background:#fff;border-radius:0 0 1.1rem 1.1rem;box-shadow:var(--shadow);padding:1.2rem;min-height:16rem}
.mg-row{display:flex;align-items:center;justify-content:space-between;padding:.85rem .2rem;border-bottom:1px solid #f1f5f9}
.mg-row:last-child{border-bottom:none}
.mg-row .nm{display:flex;align-items:center;gap:.75rem;font-size:1rem;font-weight:600}
.mg-row .nm .ico{width:2.4rem;height:2.4rem;border-radius:.8rem;display:flex;align-items:center;justify-content:center}
.mg-row .nm .ico svg{width:1.15rem;height:1.15rem}
.ico.blue{background:var(--primary-soft)}.ico.blue svg{stroke:var(--primary)}
.ico.green2{background:#ecfdf5}.ico.green2 svg{stroke:#10b981}
.mg-acts{display:flex;gap:.45rem}
.mg-acts button{padding:.4rem .75rem;border-radius:.7rem;font-size:.82rem;font-weight:600;
  display:flex;align-items:center;gap:.25rem}
.mg-acts button svg{width:.9rem;height:.9rem}
.a-edit{background:#f1f5f9;color:var(--t2)}
.a-move{background:#eef2ff;color:#6366f1}
.a-del{background:var(--rose-soft);color:var(--rose)}
.mg-add{margin-top:1rem}
.stu-class-pick{display:flex;align-items:center;gap:.6rem;margin-bottom:1rem;flex-wrap:wrap}
.stu-class-pick .lb{font-size:.92rem;font-weight:600;color:var(--t2)}
.add-fab{display:flex;align-items:center;justify-content:center;gap:.4rem;width:100%;padding:.85rem;
  border-radius:1rem;border:1.5px dashed #cbd5e1;color:var(--t3);font-size:.95rem;font-weight:600;background:#f8fafc}
.add-fab svg{width:1.05rem;height:1.05rem;stroke:currentColor}

/* ---------- 用户菜单 ---------- */
.user-sheet-mask{position:fixed;inset:0;background:rgba(15,23,42,.4);z-index:600;animation:fadeIn .18s ease}
.user-sheet{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:520px;
  background:#fff;border-radius:1.4rem 1.4rem 0 0;padding:1.3rem 1.4rem calc(1.3rem + env(safe-area-inset-bottom,0px));
  z-index:601;display:flex;flex-direction:column;gap:.3rem;animation:sheetUp .25s ease}
@keyframes sheetUp{from{transform:translate(-50%,40%);opacity:.4}to{transform:translate(-50%,0);opacity:1}}
.user-sheet .us-name{font-size:1.15rem;font-weight:800;text-align:center;padding-bottom:.7rem}
.user-sheet button{display:flex;align-items:center;gap:.8rem;padding:.95rem .4rem;font-size:.98rem;
  color:var(--t2);border-bottom:1px solid #f8fafc;font-weight:500}
.user-sheet button svg{width:1.2rem;height:1.2rem;stroke:var(--t2)}
.user-sheet button.danger{color:var(--rose)}
.user-sheet button.danger svg{stroke:var(--rose)}

/* ---------- 登录页扫码卡片 ---------- */
.qr-card{margin-top:1.1rem;padding:1.3rem 1.2rem;display:flex;flex-direction:column;align-items:center;gap:.75rem}
.qr-title{font-size:.95rem;font-weight:700;color:var(--t1)}
.qr-box{width:180px;height:180px;border-radius:.9rem;background:#fff;display:flex;align-items:center;justify-content:center;padding:6px;box-shadow:inset 0 0 0 1px var(--line)}
.qr-box canvas{display:block;border-radius:4px}
.qr-tip{font-size:.8rem;line-height:1.5;color:var(--t3);text-align:center}
.qr-fallback{font-size:.85rem;color:var(--t2);text-align:center;word-break:break-all}