/*!
 * 教室通知系统 - 响应式样式（H5 自适应 PC / 平板 / 手机）
 * 断点：≤480px 手机，481px~1024px 平板，≥1025px PC
 */

:root {
    --brand-500: #6366f1;
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #eef2ff;
    --primary-hover: #4338ca;
    --success: #16a34a;
    --warning: #f59e0b;
    --danger: #e11d48;
    --info: #0891b2;
    --bg: #f4f6fb;
    --card: #ffffff;
    --text: #111827;
    --text-soft: #374151;
    --muted: #6b7280;
    --border: #e6e9f2;
    --border-strong: #d3d9e8;
    --sidebar: #0f172a;
    --sidebar-hover: rgba(255, 255, 255, .08);
    --radius: 14px;
    --radius-sm: 10px;
    --radius-lg: 20px;
    --shadow-xs: 0 1px 2px rgba(16, 24, 40, .05);
    --shadow: 0 2px 4px rgba(16, 24, 40, .04), 0 10px 24px -14px rgba(16, 24, 40, .16);
    --shadow-md: 0 4px 10px rgba(16, 24, 40, .06), 0 22px 44px -22px rgba(16, 24, 40, .22);
    --shadow-lg: 0 30px 60px -24px rgba(16, 24, 40, .32);
    --ring: 0 0 0 4px rgba(79, 70, 229, .14);
    --grad-brand: linear-gradient(135deg, #6366f1 0%, #4f46e5 45%, #2563eb 100%);
    --grad-danger: linear-gradient(135deg, #fb7185 0%, #e11d48 100%);
    --grad-ok: linear-gradient(135deg, #34d399 0%, #16a34a 100%);
    --grad-warn: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

* { box-sizing: border-box; }
* { scrollbar-width: thin; scrollbar-color: #c7cede transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #c7cede; border: 3px solid transparent; border-radius: 999px; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: #9aa5bd; background-clip: content-box; }

html, body {
    margin: 0;
    padding: 0;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    background-image:
        radial-gradient(1100px 480px at 88% -12%, rgba(99, 102, 241, .13), transparent 62%),
        radial-gradient(900px 420px at -8% 2%, rgba(37, 99, 235, .10), transparent 58%);
    background-attachment: fixed;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary); text-decoration: none; transition: color .15s; }
a:hover { text-decoration: none; }

h1, h2, h3, h4 { margin: 0 0 12px; font-weight: 650; line-height: 1.35; color: #0f172a; letter-spacing: -.01em; }
h1 { font-size: 24px; }
h2 { font-size: 20px; }
h3 { font-size: 16.5px; }

p { margin: 0 0 10px; }

/* 数字统一等宽，避免统计/时钟跳动 */
.stat .value, .att-num, .cd-num, .random-box .picked-name, table.table td.nowrap { font-variant-numeric: tabular-nums; }

/* 卡片/区块入场动画 */
.content > .card, .content > .card-grid, .content > .stat { animation: rise .32s cubic-bezier(.2, .8, .2, 1) both; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
    .content > .card, .content > .card-grid, .content > .stat { animation: none; }
}

code, pre {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 13px;
}

/* ---------------- 布局骨架 ---------------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: 238px;
    flex: 0 0 238px;
    background:
        radial-gradient(600px 260px at 10% 0%, rgba(99, 102, 241, .28), transparent 62%),
        linear-gradient(180deg, #131c33 0%, #0f172a 55%, #0b1220 100%);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    border-right: 1px solid rgba(255, 255, 255, .06);
}

.sidebar .brand {
    padding: 20px 18px;
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, .07);
    display: flex;
    align-items: center;
    gap: 11px;
    letter-spacing: .01em;
}

/* 侧边栏品牌徽标 */
.sidebar .brand::before {
    content: '';
    flex: 0 0 34px;
    width: 34px;
    height: 34px;
    border-radius: 11px;
    background: var(--grad-brand);
    box-shadow: 0 8px 18px -6px rgba(79, 70, 229, .75), inset 0 1px 0 rgba(255, 255, 255, .35);
}

.sidebar .brand span { min-width: 0; }
.sidebar .brand small {
    display: block;
    font-size: 11.5px;
    font-weight: 400;
    color: #9aa5bd;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar nav { flex: 1; overflow-y: auto; padding: 12px 12px; }

.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 10px 13px;
    margin-bottom: 4px;
    color: #a7b0c4;
    font-size: 14.5px;
    border-radius: 12px;
    transition: background .18s, color .18s, transform .18s, box-shadow .18s;
}

.sidebar nav a .icon { width: 19px; height: 19px; opacity: .8; flex: 0 0 auto; transition: opacity .18s; }
.sidebar nav a span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.sidebar nav a:hover { background: var(--sidebar-hover); color: #fff; transform: translateX(2px); }
.sidebar nav a:hover .icon { opacity: 1; }
.sidebar nav a.active {
    background: linear-gradient(100deg, rgba(99, 102, 241, .95), rgba(37, 99, 235, .78));
    color: #fff;
    font-weight: 600;
    box-shadow: 0 12px 24px -12px rgba(79, 70, 229, .9);
}
.sidebar nav a.active .icon { opacity: 1; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
    height: 62px;
    background: rgba(255, 255, 255, .78);
    backdrop-filter: saturate(1.4) blur(14px);
    -webkit-backdrop-filter: saturate(1.4) blur(14px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 22px;
    position: sticky;
    top: 0;
    z-index: 20;
    box-shadow: 0 10px 30px -26px rgba(15, 23, 42, .5);
}

.topbar .title { font-size: 18px; font-weight: 700; letter-spacing: -.01em; }
.topbar .user-box { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.topbar .user-box .role { color: var(--muted); font-size: 12.5px; }
.topbar .user-box > span:first-child { font-weight: 600; color: var(--text-soft); }
.topbar .user-box a[data-logout] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px; height: 34px;
    border-radius: 11px;
    color: var(--muted);
    transition: background .16s, color .16s;
}
.topbar .user-box a[data-logout]:hover { background: #fff1f4; color: var(--danger); }

.content { padding: 22px; flex: 1; }
.content.narrow { max-width: 960px; margin: 0 auto; width: 100%; }

/* 手机底部导航 */
.bottom-nav {
    display: none;
    position: fixed;
    left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-top: 1px solid var(--border);
    box-shadow: 0 -10px 30px -26px rgba(15, 23, 42, .6);
    z-index: 30;
    padding-bottom: env(safe-area-inset-bottom);
}
.bottom-nav a {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: 8px 2px;
    font-size: 11.5px;
    color: var(--muted);
    transition: color .16s;
}
.bottom-nav a .icon { opacity: .7; }
.bottom-nav a.active { color: var(--primary); font-weight: 600; }
.bottom-nav a.active .icon { opacity: 1; }
.bottom-nav a:hover { text-decoration: none; }

.icon { width: 20px; height: 20px; display: inline-block; vertical-align: -4px; }
.bottom-nav .icon { width: 22px; height: 22px; }

/* ---------------- 卡片 / 网格 ---------------- */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    margin-bottom: 18px;
    overflow: hidden;
    transition: box-shadow .2s ease, transform .2s ease;
}
.card:hover { box-shadow: var(--shadow-md); }
.card > .card-head {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    background: linear-gradient(180deg, #fff, #fbfcff);
}
.card > .card-head h2, .card > .card-head h3 { margin: 0; position: relative; padding-left: 13px; }
.card > .card-head h2::before, .card > .card-head h3::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 17px;
    border-radius: 4px;
    background: var(--grad-brand);
}
.card > .card-body { padding: 18px 20px; }
.card > .card-body.flush { padding: 0; }
.card-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }

.stat {
    position: relative;
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    box-shadow: var(--shadow);
    transition: box-shadow .2s ease, transform .2s ease;
}
.stat::after {
    content: '';
    position: absolute;
    right: -34px; top: -38px;
    width: 116px; height: 116px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, .13), transparent 70%);
    pointer-events: none;
}
.stat:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat .label { color: var(--muted); font-size: 13px; letter-spacing: .02em; }
.stat .value { font-size: 30px; font-weight: 750; margin-top: 4px; letter-spacing: -.02em; }
.stat .extra { font-size: 12.5px; color: var(--muted); margin-top: 2px; }

/* ---------------- 按钮 / 表单 ---------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: 1px solid var(--border-strong);
    background: #fff;
    color: var(--text-soft);
    border-radius: 11px;
    padding: 9px 16px;
    font-size: 14px;
    font-weight: 550;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    box-shadow: var(--shadow-xs);
    transition: transform .16s cubic-bezier(.2, .8, .2, 1), box-shadow .16s, background .16s, color .16s, border-color .16s;
}
.btn:hover { background: #f7f8ff; color: var(--primary); border-color: rgba(79, 70, 229, .45); text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow); }
.btn:active { transform: translateY(0) scale(.985); }
.btn:focus-visible { outline: none; box-shadow: var(--ring); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; box-shadow: none; }
/* 彩色按钮：底色统一压深，保证白字在常态与 hover 下都清晰可读
   （原渐变起始色过亮，如 warning 的 #fbbf24 配白字对比度仅约 1.6:1，远低于 4.5:1） */
.btn-primary { background: linear-gradient(135deg, #6366f1 0%, #4338ca 100%); border-color: transparent; color: #fff; box-shadow: 0 8px 20px -8px rgba(79, 70, 229, .7); }
.btn-primary:hover { color: #fff; border-color: transparent; box-shadow: 0 12px 26px -10px rgba(79, 70, 229, .85); filter: brightness(1.06); }
.btn-danger { background: linear-gradient(135deg, #e11d48 0%, #9f1239 100%); border-color: transparent; color: #fff; box-shadow: 0 8px 20px -8px rgba(225, 29, 72, .6); }
.btn-danger:hover { color: #fff; border-color: transparent; box-shadow: 0 12px 26px -10px rgba(225, 29, 72, .75); filter: brightness(1.06); }
.btn-success { background: linear-gradient(135deg, #16a34a 0%, #14532d 100%); border-color: transparent; color: #fff; box-shadow: 0 8px 20px -8px rgba(22, 163, 74, .55); }
.btn-success:hover { color: #fff; box-shadow: 0 12px 26px -10px rgba(22, 163, 74, .7); filter: brightness(1.06); }
.btn-warning { background: linear-gradient(135deg, #d97706 0%, #78350f 100%); border-color: transparent; color: #fff; box-shadow: 0 8px 20px -8px rgba(180, 83, 9, .55); }
.btn-warning:hover { color: #fff; box-shadow: 0 12px 26px -10px rgba(180, 83, 9, .7); filter: brightness(1.06); }
.btn-info { background: linear-gradient(135deg, #0891b2 0%, #155e75 100%); border-color: transparent; color: #fff; box-shadow: 0 8px 20px -8px rgba(8, 145, 178, .6); }
.btn-info:hover { color: #fff; box-shadow: 0 12px 26px -10px rgba(8, 145, 178, .75); filter: brightness(1.06); }
/* 文字阴影兜底：即便底色被提亮，白字仍能保持轮廓清晰 */
.btn-primary, .btn-danger, .btn-success, .btn-warning, .btn-info {
    text-shadow: 0 1px 2px rgba(0, 0, 0, .32);
}
.btn-sm { padding: 6px 11px; font-size: 13px; border-radius: 9px; }
.btn-lg { padding: 12px 22px; font-size: 16px; border-radius: 13px; }
.btn-block { width: 100%; }
.btn-group { display: flex; gap: 10px; flex-wrap: wrap; }

.form-row { display: flex; flex-direction: column; margin-bottom: 15px; }
.form-row label { font-size: 13.5px; color: var(--text-soft); margin-bottom: 6px; font-weight: 600; letter-spacing: .01em; }
.form-row .hint, .form-row small { font-size: 12px; color: var(--muted); margin-top: 5px; }
input[type=text], input[type=password], input[type=number], input[type=datetime-local],
input[type=date], input[type=time], select, textarea {
    width: 100%;
    padding: 10px 13px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    font-size: 14.5px;
    background: #fff;
    color: var(--text);
    outline: none;
    transition: border-color .15s, box-shadow .15s, background .15s;
    font-family: inherit;
    box-shadow: inset 0 1px 2px rgba(16, 24, 40, .03);
}
input::placeholder, textarea::placeholder { color: #9aa3b2; }
select {
    appearance: none;
    -webkit-appearance: none;
    padding-right: 34px;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 11px center;
    cursor: pointer;
}
input:hover, select:hover, textarea:hover { border-color: #b9c2d6; }
input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: var(--ring);
    background: #fff;
}
textarea { min-height: 100px; resize: vertical; line-height: 1.6; }
.form-inline { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.form-inline .form-row { margin-bottom: 0; min-width: 170px; flex: 1; }

/* ---------------- 表格 ---------------- */
.table-wrap { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius-sm); }
table.table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14px; }
table.table th, table.table td {
    padding: 11px 14px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: middle;
}
table.table th {
    background: linear-gradient(180deg, #f9fafb, #f2f5fb);
    font-weight: 650;
    color: #4b5563;
    white-space: nowrap;
    font-size: 13px;
    letter-spacing: .02em;
}
table.table tbody tr { transition: background .15s; }
table.table tbody tr:hover { background: linear-gradient(90deg, rgba(79, 70, 229, .07), rgba(79, 70, 229, .02)); }
table.table tbody tr:last-child td { border-bottom: 1px solid var(--border); }
table.table td.nowrap, table.table th.nowrap { white-space: nowrap; }

/* ---------------- 徽标 / 提示 ---------------- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.75;
    letter-spacing: .01em;
    background: #eef2ff;
    color: #4338ca;
    white-space: nowrap;
    border: 1px solid rgba(99, 102, 241, .16);
}
.badge-success { background: #e9fbf0; color: #15803d; border-color: rgba(22, 163, 74, .18); }
.badge-danger { background: #fff1f4; color: #be123c; border-color: rgba(225, 29, 72, .18); }
.badge-warning { background: #fff8e8; color: #b45309; border-color: rgba(245, 158, 11, .22); }
.badge-info { background: #ecfeff; color: #0e7490; border-color: rgba(8, 145, 178, .18); }
.badge-muted { background: #f4f6fa; color: #4b5563; border-color: rgba(75, 85, 99, .14); }

.alert {
    padding: 11px 15px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-bottom: 14px;
    border: 1px solid transparent;
    box-shadow: var(--shadow-xs);
}
.alert-info { background: linear-gradient(90deg, #eff6ff, #f5f9ff); border-color: #c7dbfe; color: #1e40af; }
.alert-success { background: linear-gradient(90deg, #f0fdf4, #f6fdf8); border-color: #bbf7d0; color: #166534; }
.alert-warning { background: linear-gradient(90deg, #fffbeb, #fffdf5); border-color: #fde68a; color: #92400e; }
.alert-danger { background: linear-gradient(90deg, #fef2f2, #fff6f8); border-color: #fecdd6; color: #9f1239; }

.empty {
    padding: 46px 20px;
    text-align: center;
    color: var(--muted);
    font-size: 14px;
    background:
        radial-gradient(300px 90px at 50% 42%, rgba(99, 102, 241, .07), transparent 70%);
}
/* 表格/列表里的空态不应撑得过高 */
td > .empty, li > .empty { padding: 14px 10px; background: none; }

/* Toast */
.toast-wrap {
    position: fixed;
    top: 16px; left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
    pointer-events: none;
}
.toast {
    background: rgba(17, 24, 39, .9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #fff;
    padding: 10px 18px;
    border-radius: 999px;
    font-size: 14px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, .1);
    animation: toast-in .26s cubic-bezier(.2, .8, .2, 1);
}
.toast.success { background: rgba(22, 163, 74, .94); }
.toast.error { background: rgba(225, 29, 72, .94); }
@keyframes toast-in { from { opacity: 0; transform: translateY(-12px) scale(.96); } to { opacity: 1; transform: none; } }

/* 模态 */
.modal-mask {
    position: fixed; inset: 0;
    background: rgba(15, 23, 42, .5);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000; padding: 16px;
    animation: mask-in .18s ease;
}
@keyframes mask-in { from { opacity: 0; } to { opacity: 1; } }
.modal {
    background: #fff;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 470px;
    max-height: 88vh;
    overflow: auto;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, .6);
    animation: modal-in .24s cubic-bezier(.2, .8, .2, 1);
}
@keyframes modal-in { from { opacity: 0; transform: translateY(14px) scale(.97); } to { opacity: 1; transform: none; } }
.modal .modal-head { padding: 17px 22px; border-bottom: 1px solid var(--border); font-weight: 650; background: linear-gradient(180deg, #fff, #fbfcff); border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.modal .modal-body { padding: 20px 22px; }
.modal .modal-foot { padding: 14px 22px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; background: #fcfdff; border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
.hidden { display: none !important; }

/* ---------------- 登录 / 安装 ---------------- */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 16px;
    background:
        radial-gradient(1000px 520px at 12% 8%, rgba(99, 102, 241, .22), transparent 60%),
        radial-gradient(900px 480px at 88% 92%, rgba(37, 99, 235, .18), transparent 60%),
        linear-gradient(150deg, #f8f9ff 0%, #eef2fb 55%, #f3f6fd 100%);
}
.auth-card {
    width: 100%;
    max-width: 428px;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, .85);
    border-radius: 26px;
    box-shadow: 0 40px 80px -32px rgba(30, 41, 59, .38), 0 2px 6px rgba(16, 24, 40, .05);
    padding: 32px 30px;
    animation: modal-in .34s cubic-bezier(.2, .8, .2, 1);
}
.auth-card .brand { text-align: center; margin-bottom: 22px; }
.auth-card .brand h1 { font-size: 23px; margin-bottom: 5px; font-weight: 750; letter-spacing: -.02em; }
.auth-card .brand p { color: var(--muted); font-size: 13px; margin: 0; }
.auth-card .hint { color: var(--muted); font-size: 12.5px; margin: 8px 0 0; }
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
    .auth-card .brand h1 {
        background: var(--grad-brand);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }
}
.tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 20px; gap: 4px; }
.tabs button {
    flex: 1; background: none; border: none; padding: 11px 4px;
    font-size: 15px; color: var(--muted); cursor: pointer;
    border-bottom: 2px solid transparent; font-family: inherit;
    border-radius: 8px 8px 0 0;
    transition: color .16s, background .16s;
}
.tabs button:hover { color: var(--primary); background: rgba(79, 70, 229, .05); }
.tabs button.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 650; }
.qr-box { text-align: center; padding: 10px 0 4px; }
.qr-box img { width: 220px; height: 220px; background: #fff; border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); padding: 6px; }
.qr-box .tip { color: var(--muted); font-size: 13px; margin-top: 12px; }
.qr-status { margin-top: 10px; font-size: 14px; }

/* ---------------- 点名 ---------------- */
.student-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(146px, 1fr)); gap: 12px; }
.student-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 13px;
    background: #fff;
    display: flex;
    flex-direction: column;
    gap: 7px;
    box-shadow: var(--shadow-xs);
    transition: transform .18s cubic-bezier(.2, .8, .2, 1), box-shadow .18s, border-color .18s;
}
.student-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: rgba(79, 70, 229, .4); }
.student-card .name { font-size: 15.5px; font-weight: 650; letter-spacing: -.01em; }
.student-card .meta { font-size: 12px; color: #8b93a7; }
.student-card .status-btns { display: flex; gap: 5px; flex-wrap: wrap; }
.student-card .status-btns button {
    flex: 1; min-width: 36px; padding: 6px 2px; font-size: 12.5px; border-radius: 9px;
    border: 1px solid var(--border-strong); background: #fbfcfe; cursor: pointer; font-family: inherit;
    color: var(--text-soft);
    transition: transform .14s, box-shadow .14s, background .14s, color .14s, border-color .14s;
}
.student-card .status-btns button:hover { border-color: rgba(79, 70, 229, .5); color: var(--primary); background: #f5f6ff; }
.student-card .status-btns button:active { transform: scale(.96); }
.student-card .status-btns button.active { background: var(--grad-brand); color: #fff; border-color: transparent; box-shadow: 0 6px 14px -6px rgba(79, 70, 229, .8); }
.student-card .status-btns button.active.present { background: var(--grad-ok); border-color: transparent; box-shadow: 0 6px 14px -6px rgba(22, 163, 74, .6); }
.student-card .status-btns button.active.absent { background: var(--grad-danger); border-color: transparent; box-shadow: 0 6px 14px -6px rgba(225, 29, 72, .7); }
.student-card .status-btns button.active.late { background: var(--grad-warn); border-color: transparent; box-shadow: 0 6px 14px -6px rgba(245, 158, 11, .7); }
.student-card .status-btns button.active.leave { background: var(--grad-ok); border-color: transparent; box-shadow: 0 6px 14px -6px rgba(22, 163, 74, .6); }
.student-card.recorded { border-color: #c7d2fe; background: linear-gradient(180deg, #f9faff, #fff); }

.random-box {
    text-align: center;
    padding: 30px 18px;
    border: 1px solid rgba(99, 102, 241, .32);
    border-radius: var(--radius-lg);
    background: radial-gradient(600px 200px at 50% 0%, rgba(99, 102, 241, .12), transparent 70%), linear-gradient(180deg, #fbfcff, #fff);
    box-shadow: var(--shadow);
}
.random-box .picked-name { font-size: 44px; font-weight: 800; margin: 10px 0; min-height: 56px; letter-spacing: -.02em; color: var(--primary); }
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
    .random-box .picked-name {
        background: var(--grad-brand);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }
}
.random-box .picked-meta { color: var(--muted); font-size: 13px; }

/* 随机点名：标题行 / 动作区 / 本轮记录 / 抽取动画 */
.rb-head {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}
.rb-title { font-size: 18px; font-weight: 700; letter-spacing: .02em; color: var(--text); }
.rb-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 14px;
}
.rb-divider {
    position: relative;
    display: inline-block;
    margin: 20px auto 0;
    padding: 0 12px;
    font-size: 12.5px;
    color: var(--muted);
}
.rb-divider::before,
.rb-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 44px;
    height: 1px;
    background: var(--border);
}
.rb-divider::before { right: 100%; }
.rb-divider::after { left: 100%; }
.rb-avoid { max-width: 220px; margin: 14px auto 0; text-align: left; }
.rb-history {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px dashed var(--border-strong);
    text-align: left;
}
.rb-history-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-soft);
}
.rb-history-list { display: flex; flex-wrap: wrap; gap: 7px; }
.rb-chip {
    display: inline-flex;
    align-items: center;
    padding: 5px 11px;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 600;
    border: 1px solid rgba(99, 102, 241, .22);
}
.rb-chip.on {
    background: var(--grad-brand);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 8px 18px -10px rgba(79, 70, 229, .9);
}
.rb-empty { font-size: 13px; color: var(--muted); }
.rb-tip { margin-top: 14px; font-size: 12.5px; color: var(--muted); }

/* 抽取滚动与落定动画（名字用渐变文字，故不用 text-shadow） */
.random-box .picked-name.rolling { opacity: .82; filter: blur(.4px); }
.random-box .picked-name.pop { animation: pick-pop .42s cubic-bezier(.2, .8, .2, 1); }
@keyframes pick-pop {
    0% { transform: scale(.9); opacity: .4; }
    60% { transform: scale(1.06); }
    100% { transform: scale(1); opacity: 1; }
}

@media (max-width: 640px) {
    .random-box .picked-name { font-size: 34px; }
    .rb-actions .btn { flex: 1 1 auto; }
}

/* ---------------- 消息 / 时间线 ---------------- */
.msg-item {
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius);
    padding: 13px 15px;
    margin-bottom: 11px;
    background: linear-gradient(100deg, #fbfcff, #fff 45%);
    box-shadow: var(--shadow-xs);
    transition: transform .18s cubic-bezier(.2, .8, .2, 1), box-shadow .18s;
}
.msg-item:hover { transform: translateX(3px); box-shadow: var(--shadow); }
.msg-item.urgent { border-left-color: var(--danger); background: linear-gradient(100deg, #fff7f9, #fff 45%); }
.msg-item.praise { border-left-color: var(--success); background: linear-gradient(100deg, #f6fdf8, #fff 45%); }
.msg-item .msg-title { font-weight: 650; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; letter-spacing: -.01em; }
.msg-item .msg-meta { font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.msg-item .msg-content { margin-top: 7px; white-space: pre-wrap; word-break: break-word; color: #374151; }

/* 监控 */
.video-box {
    background: #0f172a;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(15, 23, 42, .08);
}
.video-box video { width: 100%; display: block; max-height: 62vh; background: #000; }
.video-box img { width: 100%; display: block; max-height: 62vh; background: #000; object-fit: contain; }
.video-box .placeholder { padding: 60px 20px; text-align: center; color: #94a3b8; font-size: 14px; }
.shout-btn {
    width: 164px; height: 164px; border-radius: 50%; font-size: 17px;
    background: var(--grad-danger);
    border-color: transparent;
    box-shadow: 0 16px 34px -14px rgba(225, 29, 72, .75);
}
.shout-btn:hover { box-shadow: 0 20px 40px -14px rgba(225, 29, 72, .85); }
.recording { animation: pulse 1.2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(220, 38, 38, .5); } 70% { box-shadow: 0 0 0 18px rgba(220, 38, 38, 0); } 100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0); } }

/* ---------------- 教室大屏 ---------------- */
.screen-page {
    position: relative;
    background-color: #0b1220;
    background-image:
        radial-gradient(900px 520px at 82% -14%, rgba(56, 189, 248, .16), transparent 62%),
        radial-gradient(800px 460px at 4% 4%, rgba(99, 102, 241, .16), transparent 60%),
        linear-gradient(180deg, #0c1526 0%, #0b1220 100%);
    color: #f8fafc;
    min-height: 100vh;
    /* 页边距随屏幕尺寸收缩，把更多面积让给模块内容 */
    padding: clamp(12px, 1.1vw, 20px);
    display: flex;
    flex-direction: column;
    gap: clamp(10px, .9vw, 16px);
    font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
}
/* 背景细微网格，增加大屏质感 */
.screen-page::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(rgba(255, 255, 255, .022) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .022) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(1200px 700px at 50% 0%, #000 40%, transparent 85%);
    -webkit-mask-image: radial-gradient(1200px 700px at 50% 0%, #000 40%, transparent 85%);
}
.screen-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; position: relative; }
.screen-head .head-right { display: flex; flex-direction: column; align-items: flex-end; gap: 12px; }
.screen-head .head-ops { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }

/* 大屏全屏按钮 */
.screen-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    color: inherit;
    background: rgba(96, 165, 250, .16);
    border: 1px solid rgba(96, 165, 250, .42);
    opacity: .85;
    transition: opacity .2s, background .2s, border-color .2s, transform .2s;
}
.screen-btn .icon { width: 18px; height: 18px; }
.screen-btn:hover { opacity: 1; background: rgba(96, 165, 250, .3); border-color: rgba(96, 165, 250, .6); transform: translateY(-1px); }
.screen-btn:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(96, 165, 250, .35); }
.screen-btn.on { background: rgba(34, 197, 94, .2); border-color: rgba(74, 222, 128, .5); }
.screen-page.theme-light .screen-btn { background: rgba(37, 99, 235, .12); border-color: rgba(37, 99, 235, .3); }
.screen-page.theme-light .screen-btn:hover { background: rgba(37, 99, 235, .2); }

/* 全屏状态：让大屏容器铺满整个屏幕 */
#screen:fullscreen, #screen:-webkit-full-screen { width: 100%; height: 100%; min-height: 100vh; }
#screen:fullscreen .screen-modules, #screen:-webkit-full-screen .screen-modules { align-content: start; }

/* 大屏右上角的登录入口：默认低调不抢内容，鼠标移入高亮 */
.screen-login {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    text-decoration: none;
    color: inherit;
    white-space: nowrap;
    background: rgba(255, 255, 255, .10);
    border: 1px solid rgba(255, 255, 255, .24);
    opacity: .78;
    transition: opacity .2s, background .2s, border-color .2s, transform .2s;
}
.screen-login:hover,
.screen-login:focus {
    opacity: 1;
    background: rgba(255, 255, 255, .22);
    border-color: rgba(255, 255, 255, .5);
    transform: translateY(-1px);
}
.screen-login .sl-name {
    padding-right: 8px;
    margin-right: 2px;
    border-right: 1px solid rgba(255, 255, 255, .3);
    font-weight: 500;
    opacity: .85;
}
.screen-page.theme-light .screen-login { background: rgba(15, 23, 42, .05); border-color: rgba(15, 23, 42, .16); }
.screen-page.theme-light .screen-login:hover { background: rgba(15, 23, 42, .12); }
.screen-page.theme-light .screen-login .sl-name { border-right-color: rgba(15, 23, 42, .2); }
.screen-page.theme-blue .screen-login { background: rgba(96, 165, 250, .16); border-color: rgba(96, 165, 250, .42); }
.screen-page.theme-blue .screen-login:hover { background: rgba(96, 165, 250, .3); }
.screen-head .school {
    font-size: clamp(22px, 2.1vw, 30px);
    font-weight: 750;
    letter-spacing: 2px;
    line-height: 1.2;
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
    .screen-head .school {
        background: linear-gradient(92deg, #ffffff 10%, #bfdbfe 55%, #67e8f9 100%);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }
}
.screen-head .clock { text-align: right; }
.screen-head .clock .time {
    font-size: clamp(26px, 2.4vw, 38px);
    font-weight: 750;
    line-height: 1.1;
    letter-spacing: 2px;
    font-variant-numeric: tabular-nums;
    text-shadow: 0 6px 26px rgba(56, 189, 248, .35);
}
.screen-head .clock .date {
    font-size: 15px;
    color: #94a3b8;
    margin-top: 2px;
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .09);
}
.screen-body { flex: 1; display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; min-height: 0; }
.screen-panel {
    background: linear-gradient(165deg, rgba(255, 255, 255, .085), rgba(255, 255, 255, .032));
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 20px;
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    box-shadow: 0 26px 48px -32px rgba(0, 0, 0, .9), inset 0 1px 0 rgba(255, 255, 255, .07);
}
.screen-panel h3 { font-size: 20px; margin-bottom: 12px; color: #eef2f7; display: flex; justify-content: space-between; align-items: center; }
.screen-timetable { flex: 1; overflow: auto; }
.screen-timetable .row {
    display: flex; align-items: center; gap: 14px;
    padding: 10px 14px; border-radius: 14px; margin-bottom: 7px;
    background: rgba(255, 255, 255, .05);
    border: 1px solid rgba(255, 255, 255, .05);
    font-size: 19px;
    transition: transform .18s cubic-bezier(.2, .8, .2, 1), background .18s;
}
.screen-timetable .row:hover { transform: translateX(3px); background: rgba(255, 255, 255, .08); }
.screen-timetable .row.current {
    background: linear-gradient(100deg, rgba(96, 165, 250, .38), rgba(56, 189, 248, .16));
    border-color: rgba(147, 197, 253, .55);
    box-shadow: 0 14px 30px -18px rgba(96, 165, 250, .9);
}
.screen-timetable .row .p {
    width: 58px;
    color: #93c5fd;
    font-weight: 700;
    flex: 0 0 auto;
}
.screen-timetable .row .s { flex: 1; color: #e8eef8; }
.screen-timetable .row .t { color: #94a3b8; font-size: 16px; font-variant-numeric: tabular-nums; }
.screen-notice { flex: 1; overflow: hidden; position: relative; }
.screen-notice .item {
    border-radius: 15px; padding: 15px 17px; margin-bottom: 11px;
    background: linear-gradient(100deg, rgba(255, 255, 255, .07), rgba(255, 255, 255, .04));
    border-left: 5px solid #3b82f6;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06);
}
.screen-notice .item.urgent { border-left-color: #ef4444; background: linear-gradient(100deg, rgba(239, 68, 68, .2), rgba(239, 68, 68, .08)); }
.screen-notice .item.praise { border-left-color: #22c55e; background: linear-gradient(100deg, rgba(34, 197, 94, .18), rgba(34, 197, 94, .07)); }
.screen-notice .item .t { font-size: 22px; font-weight: 700; color: #f1f5f9; letter-spacing: -.01em; }
.screen-notice .item .c { font-size: 18px; margin-top: 7px; color: #dbe4f2; white-space: pre-wrap; }
.screen-notice .item .m { font-size: 13px; color: #94a3b8; margin-top: 7px; }
/* 今日考勤：整块按「统计 → 出勤率 → 明细 → 日期」纵向排布，日期压在底部，不会被挤出可视区 */
.att-wrap { display: flex; flex-direction: column; gap: 10px; height: 100%; min-height: 0; }
.att-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; flex: 0 0 auto; }
.att-item {
    position: relative;
    min-width: 0;
    overflow: hidden;
    padding: 9px 6px 8px;
    border-radius: 14px;
    text-align: center;
    border: 1px solid rgba(148, 163, 184, .18);
    background: rgba(148, 163, 184, .14);
}
.att-item::after {
    content: '';
    position: absolute;
    left: 16%; right: 16%; top: 0;
    height: 2px;
    border-radius: 0 0 4px 4px;
    background: currentColor;
    opacity: .85;
}
.att-item.att-total { color: #93c5fd; border-color: rgba(96, 165, 250, .34); background: linear-gradient(180deg, rgba(59, 130, 246, .26), rgba(59, 130, 246, .08)); }
.att-item.att-present { color: #86efac; border-color: rgba(74, 222, 128, .34); background: linear-gradient(180deg, rgba(34, 197, 94, .26), rgba(34, 197, 94, .08)); }
.att-item.att-leave { color: #cbd5e1; border-color: rgba(148, 163, 184, .28); background: linear-gradient(180deg, rgba(148, 163, 184, .24), rgba(148, 163, 184, .08)); }
.att-num {
    font-size: clamp(22px, 2.4vw, 32px);
    font-weight: 800;
    line-height: 1.15;
    color: #f8fafc;
    font-variant-numeric: tabular-nums;
    letter-spacing: .5px;
}
.att-label { font-size: clamp(12px, 1.1vw, 14px); color: #cbd5e1; margin-top: 1px; letter-spacing: 1px; }
.att-rate { flex: 0 0 auto; }
.att-rate-top { display: flex; align-items: baseline; justify-content: space-between; font-size: 12.5px; color: #94a3b8; margin-bottom: 5px; }
.att-rate-top b { font-size: clamp(15px, 1.5vw, 19px); font-weight: 800; color: #e2e8f0; font-variant-numeric: tabular-nums; }
.att-bar { height: 8px; border-radius: 999px; background: rgba(148, 163, 184, .22); overflow: hidden; }
.att-bar i { display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, #34d399, #22d3ee); transition: width .6s ease; }
.att-detail { flex: 0 0 auto; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.att-chip {
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1px;
    padding: 6px 4px;
    border-radius: 11px;
    font-size: 12.5px;
    color: #94a3b8;
    border: 1px solid rgba(148, 163, 184, .16);
    background: rgba(148, 163, 184, .12);
}
.att-chip b { font-size: clamp(15px, 1.6vw, 19px); font-weight: 800; font-variant-numeric: tabular-nums; color: #e2e8f0; }
.att-chip.is-late b { color: #fbbf24; }
.att-chip.is-absent b { color: #f87171; }
.att-chip.is-none b { color: #93c5fd; }
.att-date { margin-top: auto; flex: 0 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 12.5px; color: #64748b; }
.att-live {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 2px 9px;
    border-radius: 999px;
    font-size: 12px;
    color: #fbbf24;
    background: rgba(251, 191, 36, .14);
    border: 1px solid rgba(251, 191, 36, .3);
}
.att-live::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: #fbbf24; animation: pulse-dot 1.4s infinite; }
@keyframes pulse-dot { 0% { opacity: 1; transform: scale(1); } 50% { opacity: .35; transform: scale(.8); } 100% { opacity: 1; transform: scale(1); } }

/* 「立即点名」入口：做成可点击的动作按钮（原为纯状态标签「点名进行中」） */
.att-live.att-go {
    padding: 5px 14px;
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, #2563eb, #4f46e5);
    border-color: transparent;
    text-decoration: none;
    box-shadow: 0 8px 18px -10px rgba(37, 99, 235, .95);
    transition: transform .18s, filter .18s, box-shadow .18s;
}
.att-live.att-go::before { display: none; }
.att-live.att-go:hover { color: #fff; filter: brightness(1.08); transform: translateY(-1px); text-decoration: none; }
.att-live.att-go:active { transform: translateY(0); }
/* 仍有学生未点名时转为橙色，提醒老师去完成点名 */
.att-live.att-go.hot {
    background: linear-gradient(135deg, #f59e0b, #b45309);
    box-shadow: 0 8px 18px -10px rgba(180, 83, 9, .95);
}
/* 矮模块紧凑模式：缩掉出勤率条与内边距，保证不溢出 */
.screen-mod.mod-compact .att-wrap { gap: 7px; }
.screen-mod.mod-compact .att-item { padding: 6px 4px 5px; border-radius: 12px; }
.screen-mod.mod-compact .att-num { font-size: clamp(19px, 2vw, 25px); }
.screen-mod.mod-compact .att-label { font-size: 12px; }
.screen-mod.mod-compact .att-rate-top { margin-bottom: 3px; font-size: 12px; }
.screen-mod.mod-compact .att-bar { height: 6px; }
.screen-mod.mod-compact .att-chip { padding: 3px 2px; font-size: 11.5px; }
.screen-mod.mod-compact .att-chip b { font-size: 15px; }
.screen-mod.mod-compact .att-date { font-size: 12px; }

/* 人像随机抽签 */
.fp-wrap { position: relative; border-radius: 12px; overflow: hidden; background: #000; line-height: 0; }
.fp-canvas { display: block; width: 100%; height: auto; }
.fp-status { position: absolute; left: 0; right: 0; bottom: 0; line-height: 1.4; padding: 10px 12px; font-size: 15px; color: #e2e8f0; background: linear-gradient(rgba(2,6,23,0), rgba(2,6,23,.78)); }
/* 抽签操作区：主按钮通栏，提示文字置于其下 */
.fp-actions {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 0 0 auto;
}
.fp-pick-big {
    display: block;
    width: 100%;
    padding: 16px 20px;
    border: none;
    border-radius: 16px;
    background: linear-gradient(135deg, #6366f1, #4338ca);
    color: #fff;
    font-size: clamp(18px, 2vw, 24px);
    font-weight: 800;
    letter-spacing: .06em;
    font-family: inherit;
    cursor: pointer;
    text-shadow: 0 1px 2px rgba(0, 0, 0, .35);
    box-shadow: 0 18px 38px -16px rgba(79, 70, 229, .95);
    transition: transform .18s cubic-bezier(.2, .8, .2, 1), filter .18s, box-shadow .18s;
}
.fp-pick-big:hover:not(:disabled) { filter: brightness(1.07); transform: translateY(-2px); }
.fp-pick-big:active:not(:disabled) { transform: translateY(0) scale(.99); }
.fp-pick-big:disabled { opacity: .5; cursor: not-allowed; box-shadow: none; transform: none; }
.fp-tip { font-size: 13px; color: #64748b; }
.fp-avatars { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; line-height: 1; max-height: 104px; overflow-y: auto; }
.fp-avatar { position: relative; width: 54px; height: 54px; border-radius: 50%; overflow: hidden; background: #0b1220; border: 2px solid rgba(148,163,184,.5); display: inline-flex; align-items: center; justify-content: center; transition: transform .12s ease, border-color .12s ease; }
.fp-avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.fp-avatar i { font-style: normal; font-size: 20px; color: #94a3b8; }
.fp-avatar b { position: absolute; right: 0; bottom: 0; min-width: 18px; height: 18px; line-height: 18px; padding: 0 4px; border-radius: 9px; background: rgba(15,23,42,.85); color: #e2e8f0; font-size: 12px; text-align: center; }
.fp-avatar.on { border-color: #f87171; transform: scale(1.12); box-shadow: 0 0 0 3px rgba(248,113,113,.35); }
.fp-result { position: absolute; left: 0; right: 0; top: 0; bottom: 0; display: none; align-items: center; justify-content: center; padding: 12px 12px 44px; background: rgba(2,6,23,.58); line-height: 1.35; text-align: center; }
.fp-result.show { display: flex; animation: fpIn .25s ease; }
@keyframes fpIn { from { opacity: 0; transform: scale(.96); } to { opacity: 1; transform: none; } }
.fp-card img, .fp-ph { width: min(140px, 22vh); height: min(140px, 22vh); border-radius: 50%; object-fit: cover; border: 4px solid #f87171; box-shadow: 0 0 0 6px rgba(248,113,113,.18); background: #0b1220; }
.fp-ph { display: flex; align-items: center; justify-content: center; font-size: 44px; color: #e2e8f0; background: #1e293b; margin: 0 auto; }
.fp-name { margin-top: 10px; font-size: 22px; font-weight: 700; color: #fbbf24; }
.fp-sub { margin-top: 4px; font-size: 14px; color: #cbd5e1; }

.screen-video { width: 100%; border-radius: 12px; background: #000; max-height: 34vh; }
.screen-foot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    color: #64748b;
    font-size: 12.5px;
    padding-top: 0;
    flex: 0 0 auto;
}
.screen-foot span {
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .05);
    border: 1px solid rgba(255, 255, 255, .07);
}
.screen-head .sub { color: #cbd5e1; font-size: 16px; margin-top: 6px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.screen-head .sub #class-name, .screen-head .sub #room-no {
    display: inline-flex;
    align-items: center;
    padding: 2px 11px;
    border-radius: 999px;
    background: rgba(96, 165, 250, .14);
    border: 1px solid rgba(96, 165, 250, .26);
    color: #bfdbfe;
    font-size: 15px;
}
.screen-head .sub .motto {
    margin-left: 2px;
    color: #fbbf24;
    font-weight: 600;
    padding: 2px 11px;
    border-radius: 999px;
    background: rgba(251, 191, 36, .12);
    border: 1px solid rgba(251, 191, 36, .24);
    font-size: 14.5px;
}
.screen-loading { padding: 60px 20px; text-align: center; color: #94a3b8; font-size: 20px; }

/* 大屏模块栅格（12 列）
   行高由 JS fitModules() 按可用高度写入 --mod-row-h，让模块恰好铺满一屏；
   dense 填充让较小的模块回填前面留下的空洞，减少面积浪费。 */
.screen-modules {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    grid-auto-rows: var(--mod-row-h, 66px);
    grid-auto-flow: row dense;
    gap: 14px;
    align-content: start;
}
.screen-mod {
    position: relative;
    background: linear-gradient(165deg, rgba(255, 255, 255, .085), rgba(255, 255, 255, .032));
    border: 1px solid rgba(255, 255, 255, .10);
    border-radius: 20px;
    padding: 12px 15px 13px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
    box-shadow: 0 26px 48px -32px rgba(0, 0, 0, .9), inset 0 1px 0 rgba(255, 255, 255, .07);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: mod-in .36s cubic-bezier(.2, .8, .2, 1) both;
    transition: transform .24s cubic-bezier(.2, .8, .2, 1), box-shadow .24s, border-color .24s;
}
.screen-mod:hover {
    transform: translateY(-2px);
    border-color: rgba(148, 197, 255, .3);
    box-shadow: 0 32px 58px -30px rgba(0, 0, 0, .95), inset 0 1px 0 rgba(255, 255, 255, .1);
}
.screen-mod::after {
    content: '';
    position: absolute;
    left: 20px; right: 20px; top: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(125, 211, 252, .5), transparent);
}
@keyframes mod-in { from { opacity: 0; transform: translateY(10px) scale(.99); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .screen-mod { animation: none; } }

.screen-mod .mod-title {
    position: relative;
    padding-left: 13px;
    font-size: 16.5px;
    font-weight: 650;
    letter-spacing: .01em;
    color: #eef2f7;
    margin-bottom: 9px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
}
.screen-mod .mod-title::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 16px;
    border-radius: 4px;
    background: linear-gradient(180deg, #60a5fa, #22d3ee);
}
.screen-mod .mod-extra {
    font-size: 12.5px;
    font-weight: 500;
    color: #a5c8ff;
    padding: 2px 10px;
    border-radius: 999px;
    background: rgba(96, 165, 250, .13);
    border: 1px solid rgba(96, 165, 250, .22);
    white-space: nowrap;
}
.screen-mod .mod-extra:empty { display: none; }
/* 有全屏按钮时，把状态标签推到右侧紧邻按钮 */
.screen-mod .mod-title > .mod-extra { margin-left: auto; }
/* 模块标题后的全屏按钮 */
.screen-mod .mod-fs {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px; height: 30px;
    padding: 0;
    border-radius: 9px;
    border: 1px solid rgba(148, 197, 255, .32);
    background: rgba(96, 165, 250, .14);
    color: #cfe4ff;
    cursor: pointer;
    transition: background .18s, border-color .18s, transform .18s;
}
.screen-mod .mod-fs .icon { width: 16px; height: 16px; }
.screen-mod .mod-fs:hover {
    background: rgba(96, 165, 250, .3);
    border-color: rgba(148, 197, 255, .6);
    transform: translateY(-1px);
}

/* 模块级浏览器全屏：模块独占整块屏幕（人像抽签抽人时便于全班观看）
   由 Fullscreen API 实现，:fullscreen 下浏览器已把元素铺满视口，这里只调整观感 */
.screen-mod:fullscreen {
    width: 100%;
    height: 100%;
    border-radius: 0;
    border-color: transparent;
    padding: 24px clamp(20px, 4vw, 56px);
    /* 模块本身是半透明渐变，全屏时会透出浏览器的黑色背景，这里换成不透明底色 */
    background: linear-gradient(165deg, #131f36, #050b16);
    box-shadow: none;
    animation: none;
}
.screen-mod:fullscreen:hover { transform: none; }
.screen-mod:fullscreen .mod-title { font-size: 22px; margin-bottom: 16px; }
.screen-mod:fullscreen .mod-body { overflow: auto; }
.screen-mod:fullscreen .fp-avatars { max-height: 300px; }
.screen-mod:fullscreen .fp-avatar { width: 84px; height: 84px; }
.screen-mod:fullscreen::backdrop { background: #050b16; }
/* WebKit 旧前缀写法需单独成条，否则整条规则会被丢弃 */
.screen-mod:-webkit-full-screen {
    width: 100%;
    height: 100%;
    border-radius: 0;
    border-color: transparent;
    padding: 24px clamp(20px, 4vw, 56px);
    background: linear-gradient(165deg, #131f36, #050b16);
    box-shadow: none;
    animation: none;
}
.screen-mod:-webkit-full-screen:hover { transform: none; }
.screen-mod:-webkit-full-screen .mod-title { font-size: 22px; margin-bottom: 16px; }
.screen-mod:-webkit-full-screen .mod-body { overflow: auto; }
.screen-mod:-webkit-full-screen .fp-avatars { max-height: 300px; }
.screen-mod:-webkit-full-screen .fp-avatar { width: 84px; height: 84px; }

.screen-mod .mod-body { flex: 1; min-height: 0; overflow: auto; }
.mod-body > .screen-timetable, .mod-body > .screen-notice { height: 100%; }
.mod-empty { padding: 24px 12px; text-align: center; color: #94a3b8; font-size: 16px; }
.motto-text {
    font-size: clamp(24px, 2.4vw, 32px);
    font-weight: 750;
    text-align: center;
    letter-spacing: 4px;
    line-height: 1.35;
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
    .motto-text {
        background: linear-gradient(92deg, #f8fafc 15%, #a5b4fc 60%, #67e8f9 100%);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }
}
.mod-text { font-size: 19px; line-height: 1.75; color: #e2e8f0; white-space: pre-wrap; }
.mod-list { list-style: none; margin: 0; padding: 0; }
.mod-list li {
    font-size: 16.5px;
    padding: 7px 12px;
    border-radius: 11px;
    background: rgba(255, 255, 255, .055);
    border: 1px solid rgba(255, 255, 255, .05);
    margin-bottom: 6px;
}
.mod-list li.on {
    background: linear-gradient(100deg, rgba(96, 165, 250, .34), rgba(96, 165, 250, .14));
    border-color: rgba(147, 197, 253, .45);
    color: #e0f2fe;
    font-weight: 700;
}
.duty-today {
    margin-bottom: 12px;
    padding: 10px 14px;
    border-radius: 14px;
    background: linear-gradient(100deg, rgba(96, 165, 250, .24), rgba(96, 165, 250, .06));
    border: 1px solid rgba(96, 165, 250, .26);
}
.duty-today .duty-label { font-size: 14px; color: #93c5fd; letter-spacing: .05em; }
.duty-today .duty-name { font-size: clamp(24px, 2.2vw, 30px); font-weight: 750; color: #f1f5f9; }
.random-name {
    font-size: clamp(34px, 3.4vw, 46px);
    font-weight: 800;
    text-align: center;
    letter-spacing: -.01em;
    color: #bfdbfe;
    text-shadow: 0 10px 30px rgba(96, 165, 250, .3);
}
.random-sub { text-align: center; font-size: 15px; color: #94a3b8; margin-top: 8px; }
.cd-box { text-align: center; }
.cd-num {
    font-size: clamp(28px, 2.8vw, 36px);
    font-weight: 750;
    color: #fbbf24;
    text-shadow: 0 10px 30px rgba(251, 191, 36, .28);
}
.cd-num span { font-size: 17px; margin: 0 6px 0 2px; color: #e2e8f0; font-weight: 400; text-shadow: none; }
.cd-box.past .cd-num { color: #f87171; text-shadow: 0 10px 30px rgba(248, 113, 113, .28); }
.cd-sub { font-size: 15px; color: #94a3b8; margin-top: 8px; }

/* 大屏主题 */
.screen-page.theme-light { color: #0f172a; }
.screen-page.theme-light .screen-head .sub,
.screen-page.theme-light .screen-foot { color: #475569; }
.screen-page.theme-light .screen-mod { background: rgba(255, 255, 255, .82); border-color: rgba(15, 23, 42, .14); }
.screen-page.theme-light .screen-mod .mod-title { color: #0f172a; }
.screen-page.theme-light .screen-mod .mod-extra,
.screen-page.theme-light .mod-empty,
.screen-page.theme-light .cd-sub { color: #64748b; }
.screen-page.theme-light .screen-timetable .row { background: rgba(15, 23, 42, .05); }
.screen-page.theme-light .screen-timetable .row .p { color: #1d4ed8; }
.screen-page.theme-light .screen-timetable .row .t { color: #64748b; }
.screen-page.theme-light .screen-notice .item { background: rgba(15, 23, 42, .05); }
.screen-page.theme-light .screen-notice .item .c { color: #1f2937; }
.screen-page.theme-light .screen-notice .item .m { color: #64748b; }
.screen-page.theme-light .mod-list li { background: rgba(15, 23, 42, .05); }
.screen-page.theme-light .random-name { color: #1d4ed8; }
/* 浅色主题：补齐新版组件的配色适配 */
.screen-page.theme-light .screen-mod::after { background: linear-gradient(90deg, transparent, rgba(37, 99, 235, .35), transparent); }
.screen-page.theme-light .screen-mod:hover { box-shadow: 0 28px 50px -34px rgba(15, 23, 42, .35); }
.screen-page.theme-light .screen-mod .mod-title { color: #0f172a; }
.screen-page.theme-light .screen-mod .mod-extra { background: rgba(37, 99, 235, .1); border-color: rgba(37, 99, 235, .18); color: #1d4ed8; }
.screen-page.theme-light .att-num { color: #0f172a; }
.screen-page.theme-light .att-label { color: #475569; }
.screen-page.theme-light .att-chip { background: rgba(15, 23, 42, .05); border-color: rgba(15, 23, 42, .08); color: #64748b; }
.screen-page.theme-light .att-chip b { color: #0f172a; }
.screen-page.theme-light .att-bar { background: rgba(15, 23, 42, .1); }
.screen-page.theme-light .att-date { color: #64748b; }
.screen-page.theme-light .att-rate-top { color: #64748b; }
.screen-page.theme-light .att-rate-top b { color: #0f172a; }
.screen-page.theme-light .screen-timetable .row .s { color: #0f172a; }
.screen-page.theme-light .screen-notice .item .t { color: #0f172a; }
.screen-page.theme-light .screen-head .sub #class-name,
.screen-page.theme-light .screen-head .sub #room-no { background: rgba(37, 99, 235, .1); border-color: rgba(37, 99, 235, .2); color: #1d4ed8; }
.screen-page.theme-light .screen-head .clock .date { background: rgba(15, 23, 42, .05); border-color: rgba(15, 23, 42, .1); color: #475569; }
.screen-page.theme-light .screen-foot span { background: rgba(15, 23, 42, .05); border-color: rgba(15, 23, 42, .09); }
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
    .screen-page.theme-light .screen-head .school { background: linear-gradient(92deg, #0f172a 10%, #1d4ed8 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
}

.screen-page.theme-blue {
    background-image:
        radial-gradient(900px 520px at 82% -14%, rgba(59, 130, 246, .22), transparent 62%),
        radial-gradient(800px 460px at 4% 4%, rgba(129, 140, 248, .18), transparent 60%),
        linear-gradient(160deg, #071a3a 0%, #0b1220 60%, #0a1b36 100%);
}
.screen-page.theme-blue .screen-mod { border-color: rgba(96, 165, 250, .32); }

/* 消息下发：接收范围选择 */
.scope-picker { display: flex; flex-wrap: wrap; gap: 10px; }
.scope-item {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    padding: 10px 14px;
    border-radius: 13px;
    border: 1px solid var(--border-strong);
    background: #fff;
    cursor: pointer;
    min-width: 172px;
    transition: border-color .16s, background .16s, box-shadow .16s;
}
.scope-item:hover { border-color: rgba(79, 70, 229, .45); background: #f8f9ff; }
.scope-item input { width: auto; margin-top: 3px; }
.scope-item b { display: block; font-size: 14.5px; font-weight: 650; }
.scope-item small { display: block; color: var(--muted); font-size: 12px; margin-top: 1px; }
.scope-item.on {
    border-color: transparent;
    background: linear-gradient(135deg, rgba(99, 102, 241, .16), rgba(37, 99, 235, .07));
    box-shadow: 0 0 0 2px rgba(79, 70, 229, .28);
}
.scope-item.on b { color: var(--primary); }
.picker-toolbar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.picker-tip { font-size: 12.5px; color: var(--muted); }
.class-picker { display: grid; grid-template-columns: repeat(auto-fill, minmax(172px, 1fr)); gap: 8px; }
.class-pick-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 11px;
    border-radius: 11px;
    border: 1px solid var(--border);
    background: #fff;
    cursor: pointer;
    transition: border-color .16s, background .16s;
}
.class-pick-item:hover { border-color: rgba(79, 70, 229, .4); background: #f8f9ff; }
.class-pick-item input { width: auto; flex: 0 0 auto; }
.class-pick-item b { font-size: 14px; font-weight: 600; }
.class-pick-item small { font-size: 12px; color: var(--muted); margin-left: auto; }
.class-pick-item input:checked + b { color: var(--primary); }

/* ---------------- 大屏布局编辑器 ---------------- */
.layout-grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    grid-auto-rows: 54px;
    gap: 10px;
    min-width: 560px;
}
.layout-card {
    position: relative;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(180deg, #fff, #fbfcff);
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    overflow: hidden;
    cursor: grab;
    box-shadow: var(--shadow-xs);
    transition: box-shadow .18s, opacity .18s, transform .18s, border-color .18s;
}
.layout-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--grad-brand);
    opacity: .8;
}
.layout-card { user-select: none; -webkit-user-select: none; }
.layout-card:hover { box-shadow: var(--shadow-md); border-color: rgba(79, 70, 229, .35); }
.layout-card.dragging { opacity: .55; transform: scale(.98); cursor: grabbing; box-shadow: var(--shadow-lg); }
.layout-card.drag-over { outline: 2px dashed rgba(79, 70, 229, .7); outline-offset: 2px; }
.layout-card.disabled { background: #f8fafc; border-style: dashed; }
.layout-card.disabled::before { background: #cbd5e1; }
.layout-card .lc-grip {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 650;
    color: var(--text-soft);
    cursor: grab;
    touch-action: none;
    padding-bottom: 2px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2px;
}
.layout-card .lc-grip .icon { width: 16px; height: 16px; color: var(--muted); flex: 0 0 auto; }
.layout-card .lc-grip b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layout-card .lc-head { display: flex; align-items: center; justify-content: space-between; gap: 6px; }
.layout-card .lc-key { font-size: 12px; color: var(--muted); }
.layout-card .lc-ops button:hover { transform: translateY(-1px); }
.layout-card .lc-meta { font-size: 12px; color: var(--muted); }
.layout-card .lc-ops { display: flex; flex-wrap: wrap; gap: 5px; margin-top: auto; }
.layout-card .lc-ops button {
    border: 1px solid var(--border-strong);
    background: #fff;
    border-radius: 8px;
    padding: 3px 8px;
    font-size: 12px;
    cursor: pointer;
    color: var(--text-soft);
    transition: all .15s;
}
.layout-card .lc-ops button:hover { border-color: var(--primary); color: var(--primary); }
.layout-card .lc-ops button[data-op="del"]:hover { border-color: var(--danger); color: var(--danger); }

/* ---------------- 响应式 ---------------- */
/* 平板：≤1024px */
@media (max-width: 1024px) {
    .sidebar { display: none; }
    .bottom-nav { display: flex; }
    .content { padding: 16px 14px 78px; }
    .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .screen-body { grid-template-columns: 1fr; }
    .screen-modules { grid-auto-rows: 58px; gap: 12px; }
    .screen-mod { padding: 12px 14px; }
}

/* 手机：≤480px */
@media (max-width: 480px) {
    body { font-size: 14.5px; }
    .content { padding: 12px 10px 80px; }
    .card { border-radius: 10px; }
    .card > .card-head { padding: 12px 14px; }
    .card > .card-body { padding: 12px 14px; }
    .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
    .stat { padding: 12px 14px; }
    .stat .value { font-size: 22px; }
    h1 { font-size: 19px; }
    h2 { font-size: 17px; }
    .topbar { height: 52px; padding: 0 14px; }
    .topbar .title { font-size: 16px; }
    .topbar .user-box .role { display: none; }
    .btn { padding: 9px 12px; font-size: 14px; }
    .student-grid { grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); gap: 8px; }
    .form-inline .form-row { min-width: 100%; }
    .random-box .picked-name { font-size: 32px; }
    .screen-page { padding: 14px; gap: 12px; }
    .screen-head .school { font-size: 22px; }
    .screen-head .clock .time { font-size: 30px; }
    .screen-timetable .row { font-size: 16px; padding: 7px 10px; }
    .screen-notice .item .t { font-size: 18px; }
    .screen-notice .item .c { font-size: 15px; }
    .screen-modules { grid-auto-rows: 96px; gap: 10px; }
    .screen-mod { grid-column: span 12 !important; padding: 10px 12px; }
    .screen-mod .mod-title { font-size: 16px; margin-bottom: 8px; }
    .motto-text { font-size: 22px; }
    .random-name { font-size: 32px; }
    .cd-num { font-size: 26px; }
    .modal { max-width: 100%; }
    .qr-box img { width: 180px; height: 180px; }
}

/* 大屏：≥1400px 适当放大 */
@media (min-width: 1400px) {
    .screen-head .school { font-size: 36px; }
    .screen-timetable .row { font-size: 22px; }
}

/* ---------------- 首页大屏导航（年级 → 班级 → 进入大屏） ---------------- */
.home-page {
    min-height: 100vh;
    background-color: #0b1220;
    background-image:
        radial-gradient(900px 520px at 85% -12%, rgba(56, 189, 248, .18), transparent 62%),
        radial-gradient(800px 460px at 2% 4%, rgba(99, 102, 241, .18), transparent 60%),
        linear-gradient(180deg, #0c1526 0%, #0b1220 100%);
    background-attachment: fixed;
    color: #e8eef8;
    font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    padding: 26px clamp(16px, 4vw, 46px) 30px;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    gap: 18px;
    box-sizing: border-box;
}
.home-page *,
.home-page *::before,
.home-page *::after { box-sizing: border-box; }

/* ---------- 顶部三栏：品牌 | 时钟 | 操作 ---------- */
.home-head {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    column-gap: 24px;
    row-gap: 12px;
}
.home-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
    justify-self: start;
}
.home-logo {
    position: relative;
    flex: 0 0 52px;
    width: 52px; height: 52px;
    border-radius: 16px;
    background: linear-gradient(135deg, #6366f1, #2563eb);
    box-shadow: 0 14px 30px -12px rgba(79, 70, 229, .95), inset 0 1px 0 rgba(255, 255, 255, .35);
}
.home-logo::after {
    content: '';
    position: absolute;
    left: 12px; right: 12px; top: 16px;
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, .95);
    box-shadow: 0 9px 0 rgba(255, 255, 255, .6), 0 18px 0 rgba(255, 255, 255, .35);
}
.home-titles { min-width: 0; }
.home-titles b {
    display: block;
    font-size: clamp(22px, 2.6vw, 30px);
    font-weight: 750;
    letter-spacing: .02em;
    line-height: 1.2;
    color: #ffffff;
}
.home-titles small {
    display: block;
    color: #9fb0cc;
    font-size: 13px;
    margin-top: 3px;
    line-height: 1.4;
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
    .home-titles b {
        background: linear-gradient(92deg, #ffffff 10%, #bfdbfe 55%, #67e8f9 100%);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }
}

/* 时钟放正中间 */
.home-clock {
    text-align: center;
    justify-self: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
}
.home-clock .time {
    font-size: clamp(24px, 2.8vw, 40px);
    font-weight: 750;
    font-variant-numeric: tabular-nums;
    letter-spacing: 2px;
    line-height: 1.05;
    text-shadow: 0 8px 26px rgba(96, 165, 250, .35);
}
.home-clock .date {
    font-size: 13px;
    color: #9fb0cc;
    margin-top: 4px;
    white-space: nowrap;
}

/* 操作按钮靠右 */
.home-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    justify-self: end;
    flex-wrap: wrap;
    justify-content: flex-end;
}
.home-btn {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1px;
    padding: 10px 20px;
    min-height: 44px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, .22);
    background: rgba(255, 255, 255, .08);
    color: #e8eef8;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    text-decoration: none;
    transition: transform .18s, box-shadow .18s, background .18s, color .18s;
}
.home-btn small {
    font-size: 11px;
    font-weight: 500;
    color: rgba(255, 255, 255, .65);
    line-height: 1;
}
.home-btn:hover { background: rgba(255, 255, 255, .17); transform: translateY(-1px); color: #fff; text-decoration: none; }
.home-btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }
.home-btn.primary { background: linear-gradient(135deg, #6366f1, #2563eb); border-color: transparent; color: #fff; box-shadow: 0 14px 30px -14px rgba(79, 70, 229, .95); }
.home-btn.primary:hover { color: #fff; filter: brightness(1.06); }
.home-btn.primary small { color: rgba(255, 255, 255, .85); }
.home-btn.lg { padding: 16px 30px; font-size: 17px; min-height: 56px; border-radius: 16px; }

/* ---------- 横向步骤条 ---------- */
.home-steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: stretch;
    gap: 0;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, .1);
    background: rgba(255, 255, 255, .04);
    overflow: hidden;
}
.home-steps li {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: #8ea3c2;
    font-size: 14px;
    border-right: 1px solid rgba(255, 255, 255, .07);
    transition: background .2s, color .2s;
}
.home-steps li:last-child { border-right: 0; }
.home-steps li .num {
    flex: 0 0 26px;
    width: 26px; height: 26px;
    border-radius: 9px;
    display: inline-flex; align-items: center; justify-content: center;
    background: rgba(255, 255, 255, .08);
    color: #9fb0cc;
    font-weight: 800;
    font-size: 13px;
}
.home-steps li b { font-weight: 600; }
.home-steps li.on {
    color: #fff;
    background: linear-gradient(135deg, rgba(99, 102, 241, .35), rgba(37, 99, 235, .18));
}
.home-steps li.on .num {
    background: linear-gradient(135deg, #22d3ee, #3b82f6);
    color: #04121f;
    box-shadow: 0 6px 16px -8px rgba(59, 130, 246, .9);
}

/* ---------- 主体两栏：年级侧栏 + 班级网格 ---------- */
.home-board {
    display: grid;
    grid-template-columns: minmax(220px, 280px) 1fr;
    gap: 18px;
    align-items: stretch;
}
.board-col {
    background: linear-gradient(165deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .035));
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 22px;
    padding: 18px 18px 20px;
    box-shadow: 0 26px 48px -34px rgba(0, 0, 0, .9), inset 0 1px 0 rgba(255, 255, 255, .07);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: mod-in .34s cubic-bezier(.2, .8, .2, 1) both;
    min-width: 0;
}
.board-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    flex-wrap: wrap;
    min-height: 28px;
}
.step-badge {
    display: inline-flex;
    align-items: center;
    height: 26px;
    padding: 0 12px;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(99, 102, 241, .9), rgba(37, 99, 235, .8));
    color: #fff;
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: .04em;
    line-height: 1;
}
.board-head .hint {
    margin-left: auto;
    font-size: 12.5px;
    color: #9fb0cc;
    line-height: 1;
}
.home-loading { color: #9fb0cc; font-size: 14px; }

/* 年级侧栏 */
.board-grades { display: flex; flex-direction: column; }
.grade-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.grade-chip {
    width: 100%;
    padding: 13px 16px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, .14);
    background: rgba(255, 255, 255, .06);
    color: #e8eef8;
    cursor: pointer;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-family: inherit;
    transition: transform .18s cubic-bezier(.2, .8, .2, 1), box-shadow .18s, border-color .18s, background .18s;
}
.grade-chip b { font-size: 17px; font-weight: 700; letter-spacing: .01em; }
.grade-chip small { color: #9fb0cc; font-size: 12px; }
.grade-chip:hover { transform: translateY(-1px); border-color: rgba(148, 197, 253, .45); box-shadow: 0 16px 34px -22px rgba(56, 189, 248, .95); }
.grade-chip.on {
    background: linear-gradient(135deg, rgba(99, 102, 241, .92), rgba(37, 99, 235, .78));
    border-color: transparent;
    box-shadow: 0 18px 36px -18px rgba(79, 70, 229, .95);
}
.grade-chip.on small { color: rgba(255, 255, 255, .78); }

/* 班级网格主区 */
.class-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
}
.class-card {
    position: relative;
    overflow: hidden;
    padding: 16px 16px 14px;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, .14);
    background: rgba(255, 255, 255, .06);
    color: #e8eef8;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    text-align: left;
    font-family: inherit;
    transition: transform .18s cubic-bezier(.2, .8, .2, 1), box-shadow .18s, border-color .18s, background .18s;
}
.class-card::after {
    content: '';
    position: absolute;
    left: 16px; right: 16px; top: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(125, 211, 252, .5), transparent);
}
.class-card .cc-room { font-size: 12.5px; color: #9fb0cc; }
.class-card .cc-name { font-size: 21px; font-weight: 750; letter-spacing: .02em; line-height: 1.2; }
.class-card .cc-go {
    margin-top: 6px;
    font-size: 12.5px;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .1);
}
.class-card:hover { transform: translateY(-2px); border-color: rgba(148, 197, 253, .45); box-shadow: 0 18px 36px -24px rgba(56, 189, 248, .95); }
.class-card.on {
    border-color: transparent;
    background: linear-gradient(140deg, rgba(34, 197, 94, .92), rgba(14, 116, 144, .88));
    box-shadow: 0 20px 40px -20px rgba(16, 185, 129, .95);
}
.class-card.on .cc-room { color: rgba(255, 255, 255, .82); }
.class-card.on .cc-go { background: rgba(2, 6, 23, .28); color: #fff; }

/* ---------- 底部 ---------- */
.home-foot {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    color: #7f90ad;
    font-size: 13px;
    padding: 4px 4px 0;
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
    .home-head {
        grid-template-columns: 1fr auto;
    }
    .home-clock { grid-column: 1 / 2; grid-row: 2; justify-self: start; text-align: left; align-items: flex-start; }
    .home-actions { grid-column: 2; grid-row: 2; }
    .home-board { grid-template-columns: 1fr; }
    .board-grades .grade-list { flex-direction: row; flex-wrap: wrap; }
    .grade-chip { width: auto; min-width: 110px; }
    .home-btn.lg { width: 100%; }
}
@media (max-width: 640px) {
    .home-page { padding: 18px 14px 24px; }
    .home-steps li { padding: 10px 12px; font-size: 13px; }
    .home-steps li b { font-weight: 600; }
    .class-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
    .home-actions .home-btn { padding: 8px 14px; min-height: 38px; font-size: 14px; }
}

/* ---------------- 控制台：欢迎条 / 使用情况 / 快捷操作 ---------------- */
.dash-welcome {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.dash-welcome-main { min-width: 0; }
.dash-hi {
    margin: 0;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: .02em;
    color: var(--text);
}
.dash-sub {
    margin: 6px 0 0;
    font-size: 13.5px;
    color: var(--muted);
    line-height: 1.5;
}
.muted { color: var(--muted); }

/* 快捷操作网格：自适应列数 */
.dash-shortcuts {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 14px;
}
.dash-shortcut {
    display: flex;
    align-items: center;
    gap: 13px;
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    color: var(--text);
    text-decoration: none;
    box-shadow: var(--shadow-xs);
    transition: transform .18s cubic-bezier(.2, .8, .2, 1), box-shadow .18s, border-color .18s;
}
.dash-shortcut:hover {
    transform: translateY(-2px);
    border-color: rgba(99, 102, 241, .45);
    box-shadow: 0 18px 34px -22px rgba(79, 70, 229, .85);
    text-decoration: none;
    color: var(--text);
}
.dash-sc-icon {
    flex: 0 0 42px;
    width: 42px; height: 42px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--grad-brand);
    color: #fff;
    box-shadow: 0 12px 24px -14px rgba(79, 70, 229, .95);
}
.dash-sc-icon .icon { width: 21px; height: 21px; }
.dash-sc-text {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.dash-sc-text b { font-size: 15px; font-weight: 650; }
.dash-sc-text small { font-size: 12.5px; color: var(--muted); line-height: 1.4; }

@media (max-width: 640px) {
    .dash-shortcuts { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
    .dash-hi { font-size: 19px; }
    .dash-sc-icon { flex: 0 0 38px; width: 38px; height: 38px; }
}

/* 打印 */
@media print {
    .sidebar, .topbar, .bottom-nav, .btn { display: none !important; }
}