/* 大队委投票选拔系统 · 样式（移动优先，浅色主题） */
:root{--red:#C81E1E;--red-d:#A01111;--bg:#F6F7F9;--card:#FFFFFF;--text:#1F2329;--muted:#8A9099;--border:#E7E9ED;--green:#2F9E44;--green-bg:#EBFBEE;--amber:#E8590C;--amber-bg:#FFF4E6;--red-bg:#FFF5F5;}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--red)}
.wrap{max-width:760px;margin:0 auto;padding:16px}
.hidden{display:none!important}
.muted{color:var(--muted)}
.small{font-size:12px}
.nowrap{white-space:nowrap}
code{background:#F1F3F5;border-radius:4px;padding:1px 6px;font-size:13px}

/* 顶栏 */
header.top{background:var(--red);color:#fff;padding:12px 16px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:20;box-shadow:0 1px 4px rgba(0,0,0,.12)}
.h-left{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:600}
.h-logo{background:rgba(255,255,255,.18);border-radius:8px;padding:2px 8px;font-size:13px;font-weight:500;color:#fff;text-decoration:none}
.h-right{display:flex;align-items:center;gap:10px}
.h-user{font-size:13px;opacity:.95}
.h-logout{background:rgba(255,255,255,.16);color:#fff;text-decoration:none;border-radius:8px;min-height:30px;padding:4px 12px;font-size:12px;display:inline-flex;align-items:center}

/* 卡片与表单 */
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px;margin-bottom:14px;box-shadow:0 1px 2px rgba(16,24,40,.04)}
.hero h1{font-size:20px;line-height:1.4;margin-bottom:8px}
.hero p{font-size:14px}
.fld{display:block;margin-bottom:14px}
.fld>span{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.input{width:100%;min-height:44px;border:1px solid var(--border);border-radius:10px;padding:8px 12px;font-size:15px;background:#fff;color:var(--text);font-family:inherit}
.input:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(200,30,30,.08)}
select.input{appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238A9099' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;border-radius:10px;border:none;font-size:15px;font-family:inherit;cursor:pointer;text-decoration:none;color:var(--text);background:#fff;transition:filter .15s}
.btn:active{filter:brightness(.92)}
.btn-primary{background:var(--red);color:#fff;border:1px solid var(--red)}
.btn-ghost{background:#fff;border:1px solid var(--border)}
.btn-danger{background:#FA5252;color:#fff;border:1px solid #FA5252}
.btn-sm{min-height:34px;padding:6px 14px;font-size:13px;border-radius:8px}
.btn-block{width:100%;margin-bottom:10px}

/* 提示条 */
.flash{border-radius:10px;padding:10px 14px;font-size:14px;margin-bottom:14px;border:1px solid}
.flash-ok{background:var(--green-bg);border-color:#B2E5C2;color:#206B31}
.flash-warn{background:var(--amber-bg);border-color:#FFD8A8;color:#B2450B}
.err-list{margin:6px 0 0 18px}

/* 填报行 */
.stu-row{display:flex;gap:8px;align-items:center;margin-bottom:10px}
.rank{width:36px;height:36px;border-radius:50%;background:var(--red);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:15px;flex:none}
.stu-row .input:first-of-type{flex:1;min-width:0}
.votes{max-width:104px;text-align:center}
.warn-box{background:var(--amber-bg);color:var(--amber);border:1px solid #FFD8A8;border-radius:10px;padding:10px 12px;font-size:13px;margin:12px 0}

/* 提交成功 */
.done-card{text-align:center}
.done-icon{width:54px;height:54px;border-radius:50%;background:var(--green);color:#fff;font-size:28px;display:flex;align-items:center;justify-content:center;margin:4px auto 12px}
.done-card h2{font-size:20px;margin-bottom:4px}
.done-card .tbl{margin:14px 0;text-align:left}
.lock-note{background:var(--amber-bg);color:var(--amber);border-radius:10px;padding:10px 12px;font-size:13px;margin:12px 0 16px}

/* 表格 */
.tbl{width:100%;border-collapse:collapse;font-size:14px;background:#fff}
.tbl th,.tbl td{border:1px solid var(--border);padding:8px 10px;text-align:left;vertical-align:top}
.tbl th{background:#FAFAFB;font-weight:600;color:#4B5160;white-space:nowrap}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
h2{font-size:18px}
h3{font-size:16px;margin-bottom:12px}
h4{font-size:14px;margin:16px 0 10px}

/* 后台 */
.tabs{display:flex;gap:8px;margin-bottom:14px}
.tab{flex:1;text-align:center;padding:10px 4px;border-radius:10px;background:#fff;border:1px solid var(--border);font-size:14px;color:var(--text);text-decoration:none}
.tab.active{background:var(--red);color:#fff;border-color:var(--red)}
.stat-row{display:flex;gap:10px;margin-bottom:14px}
.stat{flex:1;background:#FAFAFB;border:1px solid var(--border);border-radius:12px;padding:12px 6px;text-align:center}
.stat b{display:block;font-size:24px;color:var(--red);line-height:1.2}
.stat span{font-size:12px;color:var(--muted)}
.bar{height:10px;background:#EDEFF3;border-radius:99px;overflow:hidden}
.bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,#F03E3E,#C81E1E);border-radius:99px}
.grade-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:12px;margin-bottom:12px}
.grade-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:10px;font-size:14px}
.chips{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));gap:8px}
.chip{min-height:40px;border-radius:10px;font-size:13px;border:1px solid var(--border);background:#fff;color:var(--muted);display:flex;align-items:center;justify-content:center;padding:4px 6px;text-decoration:none}
.chip.todo{border-style:dashed}
.chip.done{background:var(--green-bg);border-color:#B2E5C2;color:var(--green);font-weight:600;border-style:solid}
.export-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.export-item{border:1px solid var(--border);border-radius:12px;padding:12px}
.export-item b{display:block;margin-bottom:4px;font-size:15px}
.export-item .small{display:block;min-height:36px}
.export-btns{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.filter-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.filter-form{display:flex;gap:8px}
.filter-form .input{min-width:140px}
.grade-row{display:flex;align-items:center;gap:8px;margin-bottom:8px;flex-wrap:wrap}
.g-name{max-width:150px}
.g-count{max-width:76px;text-align:center}
.g-remove{display:inline-flex;align-items:center;gap:4px;font-size:13px;color:var(--muted);cursor:pointer}
.g-remove input{width:16px;height:16px}
.grade-row-new .g-name{color:var(--muted)}
.row-btns{display:flex;gap:10px;justify-content:space-between;align-items:center;margin-top:12px;flex-wrap:wrap}
.row-btns form{display:flex;gap:8px}
.danger-card{border-color:#FFC9C9;background:var(--red-bg)}
.danger-card h3{color:#C92A2A}
.setup-steps{margin:12px 0 0 20px;font-size:14px;line-height:2}

/* 页脚与演示说明 */
.foot{text-align:center;font-size:12px;color:#9AA0A8;padding:18px 16px 28px}
.demo-note{background:#F1F3F5;border-radius:10px;padding:10px 14px;font-size:12px;color:#6B7280;line-height:1.7}
.home-links{margin-top:6px;text-align:center}
.home-links a{color:var(--muted);font-size:13px;text-decoration:none;border-bottom:1px dashed var(--muted);padding-bottom:1px}
.js-only{display:none}
body.js .js-only{display:inline-flex}
@media (max-width:520px){.export-grid{grid-template-columns:1fr}.stat b{font-size:20px}.wrap{padding:12px}.card{padding:14px}.g-name{max-width:120px}}