/* ============================================================
   必上公考成长系统 · 样式表（清透天蓝主题）
   ============================================================ */
:root{
  --brand:#0877d1;
  --brand-2:#168cfa;
  --brand-3:#74c9ff;
  --brand-soft:#e7f5ff;
  --brand-tint:#f5fbff;
  --gold:#e8a33d;
  --ink:#102a43;
  --ink-2:#486581;
  --ink-3:#829ab1;
  --line:#d7eaf8;
  --bg:#edf7ff;
  --card:#ffffff;
  --good:#15a34a;
  --ok:#e9a208;
  --danger:#d92d20;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(9,35,66,.05),0 8px 24px -14px rgba(9,35,66,.2);
  --shadow-lg:0 14px 44px -18px rgba(9,35,66,.36);
  --topbar-h:56px;
  --tabbar-h:60px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:var(--font);
  background-color:var(--bg);
  background-image:linear-gradient(180deg,#d9f0ff 0%,#eaf7ff 260px,rgba(237,247,255,0) 560px);
  background-repeat:no-repeat;
  color:var(--ink);
  font-size:15px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
em{font-style:normal}
img{max-width:100%}
input,select,textarea,button{font-family:inherit;font-size:15px}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:#bddff5;border-radius:8px}

.ico{width:22px;height:22px;flex:none}
.only-mobile{display:none}
.c-good{color:var(--good)}
.c-danger{color:var(--danger)}
.c-brand{color:var(--brand)}

/* ============================ 学员端外壳 ============================ */
.app-shell{min-height:100vh;display:flex;flex-direction:column}
.student-topbar{
  position:sticky;top:0;z-index:30;
  display:flex;align-items:center;gap:10px;
  padding:10px 16px;min-height:var(--topbar-h);
  background:linear-gradient(120deg,#0877d1 0%,#168cfa 52%,#53baff 100%);
  color:#fff;box-shadow:0 8px 24px -16px rgba(8,119,209,.72);
}
.student-topbar .topbar-title{flex:1;min-width:0}
.student-topbar h1{font-size:17px;line-height:1.25;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.student-topbar p{font-size:12px;opacity:.9}
.student-topbar .hello{font-size:13px;opacity:.95;background:rgba(255,255,255,.2);padding:4px 10px;border-radius:99px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;border:0;background:rgba(255,255,255,.18);
  color:inherit;cursor:pointer;flex:none;
}
.icon-btn svg{width:20px;height:20px}
.logo{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:11px;flex:none;
  background:linear-gradient(135deg,#f3fbff,#bce6ff);color:#0866ad;
  font-weight:800;font-size:13px;letter-spacing:-.5px;
  box-shadow:0 4px 12px -6px rgba(8,119,209,.5);
}
.logo-sm{width:34px;height:34px;font-size:12px}
.app-body{
  flex:1;width:100%;max-width:760px;margin:0 auto;
  padding:14px 14px calc(var(--tabbar-h) + 26px);
}
.app-body.wide{max-width:1180px}
.desk-nav{display:none}
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:40;
  display:flex;background:rgba(255,255,255,.97);
  backdrop-filter:blur(12px);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  height:var(--tabbar-h);color:var(--ink-3);font-size:11px;transition:color .15s;
}
.tab-item .ico{width:21px;height:21px}
.tab-item.on{color:var(--brand)}
.tab-item.on .ico{transform:translateY(-1px)}

/* ============================ 通用卡片 ============================ */
.card{
  background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);
  margin-bottom:14px;overflow:hidden;border:1px solid rgba(31,111,208,.07);
}
.card-hd{
  display:flex;align-items:center;gap:8px;
  padding:14px 16px 10px;font-weight:700;font-size:15px;
}
.card-hd .sub{font-weight:400;font-size:12px;color:var(--ink-3);margin-left:auto}
.card-hd .dot{width:4px;height:15px;border-radius:3px;background:linear-gradient(180deg,var(--brand),var(--brand-3));flex:none}
.card-bd{padding:0 16px 16px}
.card-bd.tight{padding-top:0}
.card-pad{padding:16px}
.card-link{display:flex;align-items:center;gap:10px;padding:13px 16px;border-top:1px solid var(--line);font-size:14px}
.card-link:active{background:var(--brand-tint)}
.card-link .arrow{margin-left:auto;color:var(--ink-3);font-size:18px;line-height:1}

/* ============================ 首页 Hero ============================ */
.hero{
  position:relative;overflow:hidden;color:#fff;
  border-radius:20px;padding:20px;margin-bottom:14px;
  background:linear-gradient(135deg,#0877d1 0%,#168cfa 52%,#53baff 100%);
  box-shadow:0 20px 44px -26px rgba(8,119,209,.82);
}
.hero::after{
  content:"";position:absolute;right:-46px;top:-56px;width:190px;height:190px;
  border-radius:50%;background:rgba(255,255,255,.16);
}
.hero::before{
  content:"";position:absolute;right:26px;bottom:-72px;width:130px;height:130px;
  border-radius:50%;background:rgba(255,255,255,.11);
}
.hero-top{display:flex;align-items:flex-start;gap:12px;position:relative;z-index:1}
.hero-name{font-size:19px;font-weight:800}
.hero-sub{font-size:12.5px;opacity:.92;margin-top:2px}
.hero-day{
  margin-left:auto;text-align:right;background:rgba(255,255,255,.2);
  border-radius:12px;padding:6px 12px;backdrop-filter:blur(4px);
}
.hero-day b{font-size:24px;line-height:1}
.hero-day small{display:block;font-size:11px;opacity:.92}
.exam-countdowns{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:14px;
  position:relative;z-index:1;
}
.exam-countdown{
  padding:11px 12px;border:1px solid rgba(255,255,255,.24);border-radius:13px;
  background:rgba(255,255,255,.17);backdrop-filter:blur(5px);
}
.exam-countdown>span{display:block;font-size:12px;font-weight:700;opacity:.96}
.exam-countdown div{display:flex;align-items:baseline;gap:4px;margin:2px 0}
.exam-countdown b{font-size:28px;line-height:1.15;font-variant-numeric:tabular-nums;letter-spacing:-.03em}
.exam-countdown em{font-size:12px;font-weight:700}
.exam-countdown small{display:block;font-size:10.5px;opacity:.82}
.hero-metrics{
  display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:16px;position:relative;z-index:1;
}
.hero-metric{background:rgba(255,255,255,.18);border-radius:12px;padding:9px 10px;text-align:center}
.hero-metric b{display:block;font-size:18px;line-height:1.2}
.hero-metric span{font-size:11px;opacity:.92}
.hero-progress{margin-top:14px;position:relative;z-index:1}
.hero-progress .row{display:flex;justify-content:space-between;font-size:12px;opacity:.94;margin-bottom:6px}
.hero-progress .track{height:7px;border-radius:99px;background:rgba(255,255,255,.28);overflow:hidden}
.hero-progress .track i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#dff0ff,#fff)}

/* ============================ 统计格 ============================ */
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:14px}
.stat-grid.col3{grid-template-columns:repeat(3,1fr)}
.stat-grid.col4{grid-template-columns:repeat(2,1fr)}
.stat{
  background:var(--card);border-radius:var(--radius-sm);padding:13px 14px;
  box-shadow:var(--shadow);border:1px solid rgba(31,111,208,.07);
}
.stat-val{font-size:21px;font-weight:800;color:var(--ink);letter-spacing:-.02em;line-height:1.2}
.stat-val em{font-size:12px;font-weight:600;color:var(--ink-3);margin-left:3px}
.stat-label{font-size:12px;color:var(--ink-3);margin-top:3px}
.stat-extra{font-size:11.5px;color:var(--ink-2);margin-top:4px}
.stat.accent{background:linear-gradient(135deg,#e7f5ff,#fbfdff);border-color:#c9e9fb}
.stat.accent .stat-val{color:var(--brand)}

/* ============================ 表单 ============================ */
.form-row{margin-bottom:14px}
.form-row>label,.form-label{
  display:block;font-size:13.5px;font-weight:600;color:var(--ink-2);margin-bottom:7px;
}
.form-label .req{color:var(--brand);margin-left:2px}
.form-label .tip{font-weight:400;color:var(--ink-3);font-size:12px;margin-left:6px}
.form-row>label .tip{font-weight:400;color:var(--ink-3);font-size:12px;margin-left:6px}
.input,select.input,textarea.input{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:#fafcff;color:var(--ink);transition:border-color .15s,background .15s;outline:none;
  appearance:none;
}
select.input{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4.5 6 8.5l4-4' stroke='%238496a8' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;padding-right:32px;
}
.input:focus{border-color:var(--brand-2);background:#fff;box-shadow:0 0 0 3px rgba(22,140,250,.16)}
textarea.input{min-height:88px;resize:vertical;line-height:1.6}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-grid .full{grid-column:1/-1}
.input-suffix{position:relative}
.input-suffix .sfx{position:absolute;right:13px;top:50%;transform:translateY(-50%);font-size:13px;color:var(--ink-3);pointer-events:none}
.input-suffix .input{padding-right:48px}

/* 多选标签 */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  position:relative;display:inline-flex;align-items:center;
  padding:8px 13px;border-radius:99px;border:1px solid var(--line);background:#fafcff;
  font-size:13.5px;color:var(--ink-2);cursor:pointer;user-select:none;transition:all .15s;
}
.chip input{position:absolute;opacity:0;pointer-events:none}
.chip:has(input:checked),.chip.on{
  background:var(--brand-soft);border-color:var(--brand-2);color:var(--brand);font-weight:600;
}
.subject-chip{min-width:86px;justify-content:center;border-width:2px;padding:9px 15px}
.subject-chip .chip-check{
  width:18px;height:18px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  background:#dce9f7;color:transparent;font-size:12px;font-weight:900;transition:all .15s;
}
.chip.subject-chip.on{
  background:linear-gradient(135deg,#0877d1,#28a4ff);border-color:#0877d1;color:#fff;
  box-shadow:0 8px 18px -10px rgba(8,119,209,.8);
}
.chip.subject-chip.on .chip-check{background:#fff;color:var(--brand)}
.subject-chip:focus-within{box-shadow:0 0 0 3px rgba(22,140,250,.18)}

/* 分段选择 */
.segmented{display:flex;background:#e3f3ff;border-radius:12px;padding:3px;gap:2px}
.segmented a,.segmented button{
  flex:1;text-align:center;padding:8px 4px;border-radius:9px;border:0;background:transparent;
  font-size:13.5px;color:var(--ink-2);cursor:pointer;font-weight:600;white-space:nowrap;
}
.segmented .on{background:#fff;color:var(--brand);box-shadow:0 2px 8px -4px rgba(24,56,96,.28)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:11px 18px;border-radius:12px;border:1px solid transparent;
  font-size:14.5px;font-weight:600;cursor:pointer;transition:all .15s;background:#fff;
  color:var(--ink);white-space:nowrap;
}
.btn-primary{background:linear-gradient(120deg,#0877d1,#168cfa 62%,#43b4ff);color:#fff;box-shadow:0 10px 24px -14px rgba(8,119,209,.85)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-2)}
.btn-soft{background:var(--brand-soft);color:var(--brand)}
.btn-danger{background:#fef3f2;color:var(--danger);border-color:#fee4e2}
.btn-sm{padding:7px 13px;font-size:13px;border-radius:9px}
.btn-lg{padding:14px 22px;font-size:16px}
.btn-block{width:100%}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-row{display:flex;gap:10px;flex-wrap:wrap}

/* ============================ 模块训练表格 ============================ */
.mod-table{display:flex;flex-direction:column;gap:6px}
.mod-head,.mod-row{display:grid;grid-template-columns:1.2fr .84fr .84fr .84fr .94fr;gap:5px;align-items:center}
.mod-table.simple .mod-head,.mod-table.simple .mod-row{grid-template-columns:1.45fr 1fr 1fr}
.mod-head{font-size:11.5px;color:var(--ink-3);text-align:center;padding:0 8px 2px}
.mod-head span:first-child{text-align:left}
.mod-row{background:#f8fbff;border:1px solid var(--line);border-radius:10px;padding:6px}
.mod-name{font-size:13px;font-weight:600;color:var(--ink-2);padding-left:5px;white-space:nowrap}
.mod-in{
  width:100%;padding:7px 4px;text-align:center;border:1px solid #dbe7f5;border-radius:8px;
  background:#fff;font-size:13px;outline:none;font-variant-numeric:tabular-nums;color:var(--ink);
  appearance:textfield;
}
.mod-in:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(30,111,196,.16)}
.mod-in::-webkit-outer-spin-button,.mod-in::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.mod-rate{
  text-align:center;font-size:13px;font-weight:700;color:var(--brand);
  font-variant-numeric:tabular-nums;white-space:nowrap;
}
.mod-rate.over{color:var(--danger)}
.mod-summary{
  display:flex;flex-wrap:wrap;gap:6px 16px;margin-top:12px;padding:10px 12px;
  background:linear-gradient(135deg,#e7f5ff,#f8fcff);border-radius:10px;
  font-size:12.5px;color:var(--ink-2);border:1px solid #cbdef2;
}
.mod-summary b{color:var(--brand);font-size:14.5px;font-variant-numeric:tabular-nums}

/* ============================ 课程学习记录 ============================ */
.course-row{background:#f8fbff;border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:10px}
.course-row-hd{display:flex;align-items:center;margin-bottom:9px}
.course-idx{font-size:12px;font-weight:700;color:var(--brand)}
.course-del{margin-left:auto;border:0;background:none;color:var(--ink-3);font-size:12px;cursor:pointer;padding:2px 8px;border-radius:6px}
.course-del:hover{background:#eef4fb;color:var(--danger)}
.course-del:disabled{opacity:.35;cursor:not-allowed}

/* ============================ 感悟 ============================ */
.feeling-item{padding:12px 0;border-bottom:1px solid var(--line)}
.feeling-item:last-child{border-bottom:0}
.feeling-hd{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.feeling-item p{font-size:13px;color:var(--ink-2);line-height:1.75;margin-bottom:3px;word-break:break-word}

/* ============================ 表格 ============================ */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius-sm)}
table.tbl{width:100%;border-collapse:collapse;font-size:13.5px;min-width:560px;background:#fff}
table.tbl th{
  text-align:left;font-weight:600;color:var(--ink-3);font-size:12.5px;
  padding:11px 12px;background:#f4f9ff;border-bottom:1px solid var(--line);white-space:nowrap;
}
table.tbl td{padding:12px;border-bottom:1px solid var(--line);vertical-align:middle}
table.tbl tr:last-child td{border-bottom:0}
table.tbl tbody tr:hover{background:#fafdff}
table.tbl .num{font-variant-numeric:tabular-nums;font-weight:600}
table.tbl.mini{min-width:0;font-size:12.5px}
table.tbl.mini th,table.tbl.mini td{padding:9px 6px}
table.tbl tr.tbl-total td{background:#eef4fb;font-weight:700;color:var(--ink);border-top:1px solid var(--line)}
table.tbl tr.tbl-total:hover td{background:#eef4fb}

/* ============================ 徽标 ============================ */
.badge{
  display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:99px;
  font-size:12px;font-weight:600;background:#eff4fa;color:var(--ink-2);white-space:nowrap;
}
.badge-good{background:#e8f8ee;color:#0f8a3c}
.badge-ok{background:#fef6e3;color:#a86a00}
.badge-warn{background:#fdecea;color:#c02517}
.badge-brand{background:var(--brand-soft);color:var(--brand)}
.badge-gold{background:#fdf3dd;color:#94630a}
.badge-gray{background:#eff4fa;color:var(--ink-3)}

/* ============================ 进度条 ============================ */
.progress{height:7px;border-radius:99px;background:#e6eefa;overflow:hidden}
.progress>span{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),var(--brand-3));transition:width .5s}
.progress.slim{height:5px}

/* ============================ 榜单 ============================ */
.rank-list{display:flex;flex-direction:column}
.rank-item{
  display:flex;align-items:center;gap:12px;padding:12px 16px;border-top:1px solid var(--line);
}
.rank-item:first-child{border-top:0}
.rank-no{
  width:26px;height:26px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;background:#eff4fa;color:var(--ink-3);flex:none;
}
.rank-no.r1{background:linear-gradient(135deg,#ffd166,#e8a33d);color:#6b4400}
.rank-no.r2{background:linear-gradient(135deg,#dfe4ec,#b9c1cd);color:#4a5261}
.rank-no.r3{background:linear-gradient(135deg,#f3cfb4,#d9a273);color:#6b3f16}
.rank-avatar{
  width:36px;height:36px;border-radius:11px;flex:none;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#dbe9f8,#b9d5f2);color:var(--brand);font-weight:700;font-size:14px;
}
.rank-main{flex:1;min-width:0}
.rank-main b{font-size:14.5px;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-main span{font-size:12px;color:var(--ink-3)}
.rank-val{text-align:right;flex:none}
.rank-val b{display:block;font-size:16px;color:var(--brand);font-variant-numeric:tabular-nums}
.rank-val span{font-size:11.5px;color:var(--ink-3)}
.rank-item.me{background:linear-gradient(90deg,#edf5fc,#fff)}

/* ============================ 战队 ============================ */
.team-card{
  display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:var(--radius-sm);
  background:#fff;border:1px solid var(--line);margin-bottom:10px;position:relative;overflow:hidden;
}
.team-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--tc,var(--brand))}
.team-flag{
  width:42px;height:42px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  font-weight:800;color:#fff;font-size:15px;flex:none;background:var(--tc,var(--brand));
}
.team-info{flex:1;min-width:0}
.team-info b{display:block;font-size:15px}
.team-info span{font-size:12px;color:var(--ink-3)}
.team-pts{text-align:right}
.team-pts b{display:block;font-size:19px;font-variant-numeric:tabular-nums}
.team-pts span{font-size:11.5px;color:var(--ink-3)}

/* ============================ 提示条 ============================ */
.flash-wrap{margin-bottom:12px}
.alert{
  padding:11px 14px;border-radius:var(--radius-sm);font-size:13.5px;margin-bottom:8px;
  border:1px solid transparent;
}
.alert-success{background:#e9f8ef;color:#0f7a37;border-color:#c8ecd6}
.alert-error{background:#fdecea;color:#b42318;border-color:#f9d4cf}
.alert-warn{background:#fef6e3;color:#96660a;border-color:#f7e3b5}
.alert-info{background:#eaf4ff;color:#1a5fae;border-color:#cfe6ff}
.tip-box{
  background:linear-gradient(135deg,#f1f7fd,#fafdff);border:1px dashed #c6dcf2;border-radius:var(--radius-sm);
  padding:11px 13px;font-size:12.5px;color:var(--ink-2);line-height:1.75;
}
.empty{text-align:center;padding:34px 16px;color:var(--ink-3)}
.empty-ico{font-size:30px;display:block;margin-bottom:8px;opacity:.7}
.empty p{font-size:13.5px}

/* ============================ 折线图 / 柱状图 ============================ */
.line-chart{width:100%;height:150px;display:block}
.chart-label{font-size:9px;fill:#8496a8;text-anchor:middle;font-family:var(--font)}
.bar-chart{display:flex;flex-direction:column;gap:11px}
.bar-row{display:flex;align-items:center;gap:10px;font-size:13px}
.bar-label{width:104px;flex:none;color:var(--ink-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bar-track{flex:1;height:9px;border-radius:99px;background:#e6eefa;overflow:hidden}
.bar-track i{display:block;height:100%;border-radius:99px;transition:width .5s}
.bar-value{width:62px;flex:none;text-align:right;font-weight:700;font-variant-numeric:tabular-nums;color:var(--ink)}

/* ============================ 管理端外壳 ============================ */
.admin-shell{min-height:100vh;display:flex}
.sidebar{
  width:228px;flex:none;background:linear-gradient(180deg,#0877d1 0%,#096bb9 55%,#075794 100%);color:#e4f5ff;
  display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0;z-index:60;
  transform:translateX(-100%);transition:transform .22s ease;
}
body.sidebar-open .sidebar{transform:none}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:18px 16px;border-bottom:1px solid rgba(255,255,255,.14)}
.brand-text strong{display:block;color:#fff;font-size:14.5px}
.brand-text small{font-size:11.5px;color:#a8c9ee}
.sidebar-nav{flex:1;padding:12px 10px;overflow-y:auto}
.side-item{
  display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;
  font-size:14px;color:#d3e5fa;margin-bottom:2px;transition:all .15s;
}
.side-item .ico{width:19px;height:19px;opacity:.85}
.side-item:hover{background:rgba(255,255,255,.12);color:#fff}
.side-item.on{background:linear-gradient(120deg,#ffffff,#e2edfa);color:#0d3462;font-weight:600;box-shadow:0 4px 14px -6px rgba(0,15,35,.55)}
.sidebar-foot{padding:12px;border-top:1px solid rgba(255,255,255,.14)}
.side-user{font-size:13.5px;color:#fff;padding:6px 12px 10px}
.side-user small{display:block;font-size:11.5px;color:#a8c9ee}
.sidebar-mask{
  position:fixed;inset:0;background:rgba(10,22,38,.5);z-index:55;opacity:0;pointer-events:none;transition:opacity .2s;
}
body.sidebar-open .sidebar-mask{opacity:1;pointer-events:auto}
.admin-main{flex:1;min-width:0;display:flex;flex-direction:column}
.admin-main .topbar{
  position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:12px;padding:12px 18px;
}
.admin-main .topbar-title h1{font-size:17px}
.admin-main .topbar-title p{font-size:12.5px;color:var(--ink-3)}
.admin-main .topbar-right{margin-left:auto;display:flex;gap:8px;align-items:center}
.admin-main .icon-btn{background:#eff4fa;color:var(--ink-2)}
.admin-body{padding:16px;flex:1;max-width:1280px;width:100%}
.admin-body.wide{max-width:none}

/* 管理端卡片网格 */
.grid{display:grid;gap:14px}
.grid-2{grid-template-columns:1fr}
.grid-3{grid-template-columns:1fr}
.grid-4{grid-template-columns:repeat(2,1fr)}
.panel{
  background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid rgba(31,111,208,.07);
  overflow:hidden;
}
.panel-hd{
  display:flex;align-items:center;gap:8px;padding:14px 16px;border-bottom:1px solid var(--line);
  font-weight:700;font-size:14.5px;background:linear-gradient(180deg,#fafdff,#fff);
}
.panel-hd .right{margin-left:auto;font-weight:400;font-size:12.5px;color:var(--ink-3);display:flex;gap:8px;align-items:center}
.panel-bd{padding:16px}
.panel-bd.flush{padding:0}

/* 工具条 */
.toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px}
.toolbar .grow{flex:1;min-width:120px}
.toolbar .input{background:#fff}
.toolbar form{display:flex;flex-wrap:wrap;gap:10px;align-items:center;width:100%}

/* 登录页 */
.auth-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;
  background:radial-gradient(1200px 600px at 15% -10%,#d8ecff 0%,transparent 55%),
             radial-gradient(900px 500px at 100% 100%,#e2f2ff 0%,transparent 50%),
             linear-gradient(160deg,#f4f9ff,#e9f3fd);
}
.auth-card{
  width:100%;max-width:400px;background:#fff;border-radius:22px;padding:28px 24px;
  box-shadow:var(--shadow-lg);border:1px solid rgba(31,111,208,.08);
}
.auth-logo{
  width:56px;height:56px;border-radius:17px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#0877d1,#43b4ff);color:#fff;font-weight:800;font-size:19px;
  margin-bottom:16px;box-shadow:0 14px 30px -16px rgba(15,52,98,.95);
}
.auth-card h1{font-size:22px;margin-bottom:6px}
.auth-card .sub{font-size:13.5px;color:var(--ink-3);margin-bottom:22px}
.auth-foot{margin-top:18px;text-align:center;font-size:12.5px;color:var(--ink-3);line-height:1.8}
.demo-box{
  margin-top:16px;background:#f4f9ff;border-radius:12px;padding:12px 14px;font-size:12.5px;
  color:var(--ink-2);line-height:1.9;
}
.demo-box b{color:var(--ink)}

/* ============================ 海报 ============================ */
.poster-stage{display:flex;flex-direction:column;align-items:center;gap:16px}
#posterCanvas{
  width:100%;max-width:380px;border-radius:20px;box-shadow:var(--shadow-lg);
  display:block;background:#fff;
}
.poster-actions{display:flex;gap:10px;width:100%;max-width:380px}
.poster-actions .btn{flex:1}

/* ============================ 桌面端适配 ============================ */
@media (min-width:768px){
  .only-mobile{display:inline-flex}
  .app-body{padding:20px 20px 112px;max-width:820px}
  .stat-grid{grid-template-columns:repeat(4,1fr)}
  .stat-grid.col3{grid-template-columns:repeat(3,1fr)}
  /* 顶部导航条已移除，底部标签栏在桌面端居中浮起，全端统一导航 */
  .tabbar{
    left:50%;right:auto;transform:translateX(-50%);
    width:min(560px,calc(100% - 48px));bottom:16px;
    border:1px solid var(--line);border-radius:16px;
    box-shadow:0 14px 34px -16px rgba(9,35,66,.42);
  }
  .student-topbar{padding:12px 22px}
  .form-grid{grid-template-columns:1fr 1fr 1fr}
  .grid-2{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(4,1fr)}
  .line-chart{height:190px}
  .poster-stage{flex-direction:row;align-items:flex-start;justify-content:center;gap:24px}
  .poster-actions{flex-direction:column;max-width:200px}
  .mod-head,.mod-row{grid-template-columns:1.15fr .85fr .85fr .85fr .9fr}
  .mod-table.simple .mod-head,.mod-table.simple .mod-row{grid-template-columns:1.6fr 1fr 1fr}
}
@media (min-width:1024px){
  .sidebar{transform:none}
  .admin-main{margin-left:228px}
  .sidebar-mask{display:none}
  .admin-body{padding:22px 26px}
  .only-mobile{display:none}
}
@media print{
  .tabbar,.desk-nav,.topbar,.sidebar,.poster-actions{display:none!important}
  body{background:#fff}
}