:root{--nav:#172033;--nav-hover:#25324b;--primary:#2563eb;--bg:#f3f6fb;--text:#1f2937;--muted:#64748b;--line:#e5e7eb}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei",Arial,sans-serif}.admin-shell{display:flex;min-height:100vh}.admin-sidebar{width:230px;background:var(--nav);color:#fff;padding:22px 14px}.admin-brand{font-size:20px;font-weight:700;padding:0 12px 22px}.admin-nav a{display:block;color:#cbd5e1;padding:12px 14px;margin:4px 0;border-radius:7px;text-decoration:none}.admin-nav a:hover,.admin-nav a.active{color:#fff;background:var(--nav-hover)}.admin-main{flex:1;min-width:0}.admin-topbar{height:64px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:flex-end;padding:0 28px;gap:18px}.admin-user{color:var(--muted)}.admin-content{padding:28px;max-width:1240px;margin:auto}.page-header{margin-bottom:20px}.page-header h1{font-size:24px;margin:0 0 7px}.page-header p{margin:0;color:var(--muted)}.admin-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px;box-shadow:0 3px 12px rgba(15,23,42,.04)}.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:18px}.status-ok{color:#15803d;background:#dcfce7;padding:4px 9px;border-radius:999px}.status-missing{color:#b91c1c;background:#fee2e2;padding:4px 9px;border-radius:999px}.upload-box{border:2px dashed #cbd5e1;border-radius:10px;padding:32px;text-align:center;background:#f8fafc}.result-box{text-align:center;padding:42px}.result-number{font-size:44px;font-weight:700;color:var(--primary)}.login-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#172033,#2563eb)}.login-card{width:min(400px,calc(100% - 32px));background:#fff;border-radius:12px;padding:34px;box-shadow:0 20px 50px rgba(0,0,0,.25)}.login-card h1{font-size:24px;margin:0 0 8px}.login-card>p{color:var(--muted);margin:0 0 24px}.captcha-row{display:flex;gap:10px}.captcha-row img{width:120px;height:40px;border:1px solid var(--line);border-radius:3px;cursor:pointer}.pager{display:flex;align-items:center;gap:10px;margin-top:18px;color:var(--muted)}
@media(max-width:760px){.admin-shell{display:block}.admin-sidebar{width:100%;padding:14px}.admin-brand{padding-bottom:10px}.admin-nav{display:flex;gap:6px}.admin-nav a{flex:1;text-align:center}.admin-topbar{height:54px;padding:0 14px}.admin-content{padding:16px}.admin-card{padding:16px}.layui-table{font-size:12px}}
.search-input{max-width:280px}.toolbar select{height:38px;border:1px solid #d2d2d2;border-radius:3px;padding:0 28px 0 10px;background:#fff}.table-wrap{overflow-x:auto}.empty-row{text-align:center}.follow-dialog{width:min(780px,calc(100% - 24px));max-height:90vh;padding:0;border:0;border-radius:14px;box-shadow:0 24px 70px rgba(15,23,42,.3);color:var(--text)}.follow-dialog::backdrop{background:rgba(15,23,42,.58);backdrop-filter:blur(2px)}.dialog-header{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;padding:20px 24px;background:#fff;border-bottom:1px solid var(--line)}.dialog-header h2{margin:0 0 4px;font-size:20px}.dialog-header p{margin:0;color:var(--muted);font-size:13px}.dialog-close{border:0;background:#f1f5f9;width:34px;height:34px;border-radius:50%;font-size:24px;line-height:1;cursor:pointer;color:#475569}.dialog-body{padding:22px 24px 26px;background:#f8fafc}.student-card{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:10px}.student-card div{display:flex;flex-direction:column;gap:4px}.student-card span,.section-title span{font-size:12px;color:var(--muted)}.student-card strong{font-size:14px}.follow-section{margin-top:18px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:10px}.section-title{display:flex;align-items:baseline;gap:10px;margin-bottom:16px}.section-title b{font-size:16px}.follow-form label{display:block;margin-top:12px;font-size:14px;font-weight:600}.follow-form select,.follow-form input,.follow-form textarea{display:block;width:100%;margin-top:7px;border:1px solid #cbd5e1;border-radius:6px;background:#fff;padding:9px 11px;font:inherit;font-weight:400}.follow-form textarea{min-height:92px;resize:vertical}.follow-form select:focus,.follow-form input:focus,.follow-form textarea:focus{outline:2px solid #bfdbfe;border-color:var(--primary)}.follow-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:10px 24px;font-size:13px;color:var(--muted);margin:14px 0}.follow-actions{text-align:right;margin-top:14px}.follow-disabled{opacity:.5;pointer-events:none}.follow-message{margin:16px 0 0;padding:10px 12px;border-radius:6px}.follow-message.error{color:#b91c1c;background:#fee2e2}.follow-message.success{color:#15803d;background:#dcfce7}@media(max-width:600px){.student-card,.follow-meta{grid-template-columns:1fr}.dialog-header,.dialog-body{padding:16px}.follow-section{padding:16px}.toolbar>*{width:100%;max-width:none!important}}
.import-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:28px}.import-summary div{padding:22px;background:#f8fafc;border:1px solid var(--line);border-radius:10px}.import-summary strong{display:block;font-size:36px;color:var(--primary)}.import-summary span{display:block;margin-top:5px;color:var(--muted)}@media(max-width:600px){.import-summary{grid-template-columns:1fr}}
.inline-actions{display:flex;gap:6px;white-space:nowrap}
.action-dialog{width:min(430px,calc(100% - 28px));padding:26px;border:0;border-radius:14px;box-shadow:0 24px 70px rgba(15,23,42,.3);color:var(--text)}.action-dialog::backdrop{background:rgba(15,23,42,.58);backdrop-filter:blur(2px)}.action-dialog h2{margin:0 42px 18px 0;font-size:20px}.action-dialog p{color:var(--muted)}.action-dialog .dialog-close{position:absolute;right:20px;top:18px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}
.page-jump{display:flex;align-items:center;gap:6px}.page-jump .layui-input{width:72px;height:30px}
.login-error{margin:0 0 18px;padding:11px 13px;color:#b91c1c;background:#fee2e2;border:1px solid #fecaca;border-radius:6px;font-size:14px}
.batch-bar{display:flex;align-items:center;justify-content:flex-end;gap:10px;padding:10px 0}.batch-bar span{margin-right:auto;color:var(--muted)}.audit-select{display:flex;align-items:center;gap:7px;white-space:nowrap;cursor:pointer}.audit-select input{width:16px;height:16px;accent-color:var(--primary)}
.date-filter{display:flex;flex-direction:column;gap:3px;color:var(--muted);font-size:12px}.date-filter .layui-input{width:150px;height:38px;color:var(--text)}
.audit-toolbar{align-items:flex-end}
.name-search-input{max-width:160px}.toolbar-actions{display:flex;gap:10px;white-space:nowrap}
.date-cell{display:flex;align-items:center;gap:8px;white-space:nowrap}
.date-change{display:flex;align-items:center;justify-content:center;gap:14px;margin:20px 0;padding:18px;border-radius:9px;background:#f8fafc}.date-change strong{font-size:17px;color:var(--text)}.date-change span{color:var(--primary);font-size:20px}
.suspect-row{background:#fffbeb}.suspect-inline{margin-top:5px;color:#b45309;font-size:12px}.suspect-inline b,.status-suspect{color:#92400e;background:#fef3c7;padding:3px 7px;border-radius:999px}.suspect-value{color:#b45309}.suspect-dialog{width:min(680px,calc(100% - 28px))}.suspect-card{margin-top:12px;padding:16px;border:1px solid #fcd34d;border-radius:9px;background:#fffbeb}.suspect-card h3{margin:0 0 12px;color:#92400e}.suspect-card div{display:grid;grid-template-columns:100px 1fr;gap:10px;margin-top:8px}.suspect-card div>span{color:var(--muted)}.suspect-card mark{color:#b91c1c;background:#fecaca;font-weight:700}.suspect-warning{margin-top:16px;color:#92400e}