* { box-sizing: border-box; }
:root {
    --navy: #344054;
    --blue: #3b6fc4;
    --blue-soft: #eef3fa;
    --ink: #1f2937;
    --muted: #6b7280;
    --line: #dfe3e8;
    --canvas: #f3f4f6;
    --white: #fff;
    --green: #1f8b5f;
    --orange: #bd651f;
    font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}
html, body { margin: 0; min-height: 100%; background: var(--canvas); color: var(--ink); }
body { font-size: 14px; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button, .button { cursor: pointer; }
.app-shell { min-height: 100vh; }

.sidebar {
    position: fixed; inset: 0 auto 0 0; width: 230px; z-index: 20;
    display: flex; flex-direction: column; padding: 22px 18px;
    background: var(--navy); color: #fff; overflow-y: auto;
}
.brand { display: flex; align-items: center; gap: 11px; padding: 0 8px 24px; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; background: var(--blue); border-radius: 5px; font-weight: 700; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 18px; }
.brand small { color: #b8c3d2; font-size: 10px; margin-top: 2px; }
.nav-title { padding: 7px 12px; color: #93a4bb; font-size: 11px; }
.side-nav { display: grid; gap: 4px; }
.side-nav a { display: flex; gap: 11px; align-items: center; padding: 11px 13px; color: #c8d0dc; border-radius: 5px; }
.side-nav a span { width: 20px; text-align: center; }
.side-nav a:hover { background: rgba(255,255,255,.08); color: #fff; }
.side-nav a.active { background: var(--blue); color: #fff; }
.support { margin-top: auto; padding: 14px; border: 1px solid rgba(255,255,255,.15); border-radius: 5px; }
.support strong, .support small { display: block; }
.support small { color: #b8c3d2; line-height: 1.6; margin: 6px 0 10px; font-size: 11px; }
.support button { width: 100%; padding: 7px; border: 0; border-radius: 4px; background: #fff; color: var(--navy); }

.main-shell { margin-left: 230px; min-width: 0; }
.topbar {
    position: fixed; top: 0; right: 0; left: 230px; z-index: 15; height: 72px;
    display: flex; align-items: center; padding: 0 28px; background: #fff; border-bottom: 1px solid var(--line);
}
.role-switch { display: flex; padding: 3px; background: var(--canvas); border-radius: 5px; }
.role-switch a { color: var(--muted); padding: 8px 13px; border-radius: 4px; font-size: 13px; white-space: nowrap; }
.role-switch a.active { background: #fff; color: var(--blue); border: 1px solid var(--line); padding: 7px 12px; font-weight: 600; }
.top-user { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.top-user strong, .top-user small { display: block; }
.top-user strong { font-size: 13px; }
.top-user small { color: var(--muted); font-size: 10px; margin-top: 2px; }
.avatar { width: 36px; height: 36px; display: grid; place-items: center; background: var(--blue-soft); color: var(--blue); border-radius: 5px; font-weight: 700; }
.menu-button { display: none; width: 36px; height: 36px; border: 1px solid var(--line); background: #fff; border-radius: 4px; }
.page-content { max-width: 1500px; margin: 0 auto; padding: 98px 28px 38px; }

.page-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin-bottom: 22px; }
.page-heading h1 { font-size: 23px; margin: 0 0 6px; }
.page-heading p { margin: 0; color: var(--muted); font-size: 13px; }
.heading-actions { display: flex; gap: 8px; }
.button { display: inline-flex; align-items: center; justify-content: center; padding: 9px 14px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 4px; font-size: 13px; }
.button.primary { color: #fff; background: var(--blue); border-color: var(--blue); }
.button:hover { filter: brightness(.97); }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 14px; margin-bottom: 17px; }
.stat, .panel, .student-summary { background: #fff; border: 1px solid var(--line); border-radius: 5px; }
.stat { padding: 17px; }
.stat-label { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 12px; }
.stat-icon { width: 30px; height: 30px; display: grid; place-items: center; background: var(--blue-soft); color: var(--blue); border-radius: 4px; }
.stat-value { margin: 13px 0 5px; font-size: 25px; font-weight: 700; }
.stat-note { color: var(--muted); font-size: 11px; }
.stat-note b { color: var(--green); }
.workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px; margin-bottom: 17px; }
.flow-step { padding: 14px; background: #fff; border: 1px solid var(--line); border-radius: 5px; }
.flow-step small, .flow-step strong { display: block; }
.flow-step small { color: var(--muted); font-size: 10px; margin-bottom: 6px; }
.flow-step.done { border-left: 4px solid var(--green); }
.flow-step.active { border-left: 4px solid var(--blue); background: var(--blue-soft); }
.columns { display: grid; grid-template-columns: minmax(0,1.6fr) minmax(290px,.7fr); gap: 17px; }
.panel { padding: 18px; min-width: 0; margin-bottom: 17px; }
.panel-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.panel-title h2 { margin: 0; font-size: 15px; }
.panel-title a { color: var(--blue); font-size: 12px; }
.panel-title span { color: var(--muted); font-size: 11px; }
.list-toolbar { display: grid; grid-template-columns: minmax(180px,1fr) 160px 150px auto; gap: 8px; margin-bottom: 14px; }
.list-toolbar input, .list-toolbar select { min-width: 0; padding: 9px 10px; border: 1px solid var(--line); border-radius: 4px; background: #fff; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 12px; }
th { text-align: left; color: var(--muted); background: #f8f9fb; font-weight: 500; white-space: nowrap; }
th, td { padding: 11px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
tbody tr:hover { background: #fbfcfd; }
td strong, td small { display: block; }
td small { color: var(--muted); margin-top: 3px; }
.table-action { border: 0; background: transparent; color: var(--blue); padding: 3px; white-space: nowrap; }
.tag { display: inline-flex; padding: 3px 8px; border-radius: 12px; font-size: 10px; white-space: nowrap; }
.tag.green { color: var(--green); background: #eaf7f1; }
.tag.orange { color: var(--orange); background: #fff1e6; }
.tag.blue { color: var(--blue); background: var(--blue-soft); }
.tag.gray { color: var(--muted); background: #f0f1f3; }
.todo-list { display: grid; }
.todo { display: flex; align-items: center; gap: 10px; padding: 11px 0; border-bottom: 1px solid var(--line); }
.todo:last-child { border-bottom: 0; }
.todo-mark, .course-icon { width: 34px; height: 34px; flex: 0 0 auto; display: grid; place-items: center; background: var(--blue-soft); color: var(--blue); border-radius: 4px; font-size: 11px; }
.todo strong, .todo small { display: block; }
.todo strong { font-size: 12px; }
.todo small { color: var(--muted); font-size: 10px; margin-top: 3px; }
.schedule { min-width: 700px; }
.schedule td { height: 72px; min-width: 110px; }
.schedule td span { display: block; padding: 8px; background: var(--blue-soft); color: #28569f; border-radius: 4px; }
.student-summary { display: flex; align-items: center; gap: 12px; padding: 15px; margin-bottom: 14px; }
.student-avatar { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; background: var(--blue-soft); color: var(--blue); font-weight: 700; }
.student-summary strong, .student-summary span { display: block; }
.student-summary span { color: var(--muted); font-size: 11px; margin-top: 3px; }
.course-row { display: flex; align-items: center; gap: 11px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.course-row:last-child { border-bottom: 0; }
.course-row div { flex: 1; }
.course-row strong, .course-row small { display: block; }
.course-row small { color: var(--muted); font-size: 11px; margin-top: 4px; }
.bill { display: flex; align-items: center; justify-content: space-between; gap: 15px; }
.bill strong, .bill small { display: block; }
.bill small { color: var(--muted); margin-top: 5px; }

.form-panel { max-width: 820px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.form-grid label span { display: block; margin-bottom: 7px; color: #4b5563; font-size: 12px; }
.form-grid em { color: #c73f45; font-style: normal; }
.form-grid input, .form-grid select, .form-grid textarea { width: 100%; padding: 10px 11px; border: 1px solid var(--line); border-radius: 4px; background: #fff; outline: none; }
.form-grid textarea { min-height: 88px; resize: vertical; }
.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 2px var(--blue-soft); }
.form-actions { display: flex; justify-content: flex-end; gap: 9px; padding-top: 20px; margin-top: 20px; border-top: 1px solid var(--line); }
.flash { margin-bottom: 16px; padding: 11px 13px; border: 1px solid; border-radius: 4px; font-size: 12px; }
.flash.success { color: var(--green); border-color: #a7d9c3; background: #eff9f4; }
.flash.error { color: #b73a40; border-color: #e3b5b7; background: #fff2f2; }
.toast { position: fixed; right: 24px; bottom: 24px; z-index: 50; padding: 12px 16px; color: #fff; background: var(--navy); border-radius: 4px; transform: translateY(80px); opacity: 0; transition: .2s; }
.toast.show { opacity: 1; transform: translateY(0); }

/* 家长端：完整小程序页面 */
.mini-app { width: min(430px, 100%); margin: 0 auto; position: relative; overflow: hidden; background: #f4f6f9; border: 2px solid #606978; border-radius: 22px; min-height: 720px; }
.mini-header { padding: 10px 17px 21px; color: #fff; background: var(--blue); }
.mini-status { display: flex; justify-content: space-between; font-size: 9px; margin-bottom: 17px; opacity: .9; }
.mini-headline { display: flex; justify-content: space-between; align-items: center; }
.mini-headline small { display: block; font-size: 10px; opacity: .8; margin-bottom: 4px; }
.mini-headline h1 { margin: 0; font-size: 20px; }
.mini-headline button { border: 1px solid rgba(255,255,255,.45); border-radius: 14px; color: #fff; background: rgba(255,255,255,.12); min-width: 52px; padding: 3px 9px 7px; letter-spacing: 2px; }
.mini-content { padding: 13px 13px 76px; min-height: 610px; }
.mini-student, .mini-white-card, .mini-list-card, .mini-calendar, .mini-lesson-card, .mini-course-card { background: #fff; border: 1px solid var(--line); border-radius: 7px; }
.mini-student { display: flex; align-items: center; gap: 10px; padding: 13px; }
.mini-student-avatar { width: 40px; height: 40px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 50%; background: var(--blue-soft); color: var(--blue); font-weight: 700; }
.mini-student div { flex: 1; }
.mini-student strong, .mini-student small { display: block; }
.mini-student small { color: var(--muted); font-size: 10px; margin-top: 3px; }
.mini-student a { color: var(--blue); font-size: 10px; }
.mini-shortcuts { display: grid; grid-template-columns: repeat(4,1fr); margin: 11px 0; padding: 13px 5px; background: #fff; border: 1px solid var(--line); border-radius: 7px; }
.mini-shortcuts a { text-align: center; color: var(--muted); font-size: 9px; }
.mini-shortcuts span { width: 31px; height: 31px; display: grid; place-items: center; margin: 0 auto 6px; border-radius: 5px; background: var(--blue-soft); color: var(--blue); font-size: 13px; }
.mini-section-title { display: flex; align-items: center; justify-content: space-between; margin: 16px 2px 9px; }
.mini-section-title strong { font-size: 13px; }
.mini-section-title a, .mini-section-title span { color: var(--muted); font-size: 9px; }
.mini-lesson-card { display: flex; align-items: center; gap: 10px; padding: 12px; margin-bottom: 9px; }
.mini-date { width: 38px; height: 43px; display: grid; place-items: center; align-content: center; background: var(--blue-soft); color: var(--blue); border-radius: 5px; font-size: 9px; }
.mini-date small { display: block; font-size: 16px; font-weight: 700; }
.mini-lesson-card > div { flex: 1; }
.mini-lesson-card strong, .mini-lesson-card small { display: block; }
.mini-lesson-card strong { font-size: 12px; margin-bottom: 5px; }
.mini-lesson-card small { color: var(--muted); font-size: 9px; margin-top: 3px; }
.mini-course-card { display: flex; align-items: center; gap: 10px; padding: 11px; margin-bottom: 9px; }
.mini-course-cover { width: 70px; height: 70px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 5px; background: var(--blue-soft); color: var(--blue); font-size: 20px; font-weight: 700; }
.mini-course-card > div { flex: 1; min-width: 0; }
.mini-course-card strong, .mini-course-card small { display: block; }
.mini-course-card strong { font-size: 12px; margin-bottom: 5px; }
.mini-course-card small { color: var(--muted); font-size: 9px; margin-top: 3px; }
.mini-course-card b { display: block; margin-top: 6px; color: #c7484d; font-size: 11px; }
.mini-course-card button, .mini-enroll-link { align-self: flex-end; border: 0; border-radius: 4px; padding: 7px 9px; color: #fff; background: var(--blue); font-size: 9px; white-space: nowrap; }
.mini-search { display: flex; align-items: center; gap: 7px; padding: 8px 11px; margin-bottom: 10px; background: #fff; border: 1px solid var(--line); border-radius: 5px; }
.mini-search input { flex: 1; border: 0; outline: none; font-size: 11px; }
.mini-filter, .mini-tabs { display: flex; gap: 6px; margin-bottom: 11px; }
.mini-filter button, .mini-tabs button { flex: 1; border: 1px solid var(--line); padding: 7px 4px; background: #fff; color: var(--muted); border-radius: 4px; font-size: 10px; }
.mini-filter button.active, .mini-tabs button.active { border-color: var(--blue); color: var(--blue); background: var(--blue-soft); }
.mini-white-card { padding: 13px; margin-bottom: 10px; }
.mini-card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 9px; }
.mini-enrollment > small { color: var(--muted); font-size: 9px; }
.mini-enrollment p { margin: 8px 0; font-size: 10px; color: #4b5563; }
.mini-enrollment > a { display: block; padding-top: 8px; border-top: 1px solid var(--line); color: var(--blue); text-align: right; font-size: 9px; }
.mini-calendar { padding: 12px; }
.mini-calendar > div { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.mini-calendar button { border: 0; background: transparent; color: var(--blue); }
.mini-calendar ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(7,1fr); gap: 5px; text-align: center; }
.mini-calendar li { min-height: 27px; display: grid; place-items: center; border-radius: 50%; color: var(--muted); font-size: 9px; }
.mini-calendar li.selected { color: #fff; background: var(--blue); }
.mini-calendar li.has-class { border: 1px solid var(--blue); color: var(--blue); }
.mini-record { display: grid; grid-template-columns: 56px 1fr auto; align-items: center; gap: 8px; padding: 11px 4px; border-bottom: 1px solid var(--line); }
.mini-record > span { color: var(--muted); font-size: 9px; }
.mini-record strong, .mini-record small { display: block; }
.mini-record strong { font-size: 11px; }
.mini-record small { color: var(--muted); font-size: 9px; margin-top: 3px; }
.mini-record b { color: var(--green); font-size: 9px; }
.mini-bill-summary { padding: 18px; margin-bottom: 11px; color: #fff; background: var(--blue); border-radius: 7px; }
.mini-bill-summary small, .mini-bill-summary strong, .mini-bill-summary span { display: block; }
.mini-bill-summary strong { font-size: 28px; margin: 8px 0 5px; }
.mini-bill-summary span { font-size: 9px; opacity: .8; }
.mini-white-card dl { margin: 0; }
.mini-white-card dl div { display: flex; justify-content: space-between; padding: 7px 0; font-size: 10px; }
.mini-white-card dt { color: var(--muted); }
.mini-white-card dd { margin: 0; }
.mini-white-card dl .total { border-top: 1px solid var(--line); margin-top: 4px; padding-top: 11px; }
.mini-white-card dl .total dd { color: #c7484d; font-weight: 700; }
.mini-primary { display: block; width: 100%; padding: 10px; border: 0; border-radius: 4px; color: #fff; background: var(--blue); }
.mini-tip { color: var(--muted); font-size: 9px; line-height: 1.6; padding: 0 4px; }
.mini-profile-head { display: flex; align-items: center; gap: 9px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.mini-profile-head > div { flex: 1; }
.mini-profile-head strong, .mini-profile-head small { display: block; }
.mini-profile-head small { color: var(--muted); font-size: 9px; margin-top: 3px; }
.mini-info-row { display: flex; justify-content: space-between; padding-top: 11px; font-size: 10px; }
.mini-info-row span { color: var(--muted); }
.mini-add { display: block; padding: 11px; margin-bottom: 10px; text-align: center; color: var(--blue); background: #fff; border: 1px dashed #9ab4df; border-radius: 5px; font-size: 10px; }
.mini-list-card { overflow: hidden; }
.mini-list-card a, .mini-list-card button { width: 100%; display: flex; justify-content: space-between; padding: 12px 13px; border: 0; border-bottom: 1px solid var(--line); background: #fff; font-size: 10px; }
.mini-list-card a:last-child, .mini-list-card button:last-child { border-bottom: 0; }
.mini-list-card b { color: var(--muted); }
.mini-form-head { margin-bottom: 12px; }
.mini-form-head a { color: var(--blue); font-size: 10px; }
.mini-form-head p { color: var(--muted); font-size: 9px; }
.mini-form { padding: 13px; background: #fff; border: 1px solid var(--line); border-radius: 6px; }
.mini-form label { display: block; margin-bottom: 11px; }
.mini-form label span { display: block; color: #4b5563; font-size: 10px; margin-bottom: 5px; }
.mini-form input, .mini-form select, .mini-form textarea { width: 100%; padding: 9px; border: 1px solid var(--line); border-radius: 4px; background: #fff; font-size: 11px; }
.mini-form textarea { min-height: 72px; resize: vertical; }
.mini-message { position: relative; display: flex; gap: 10px; padding: 12px; margin-bottom: 9px; background: #fff; border: 1px solid var(--line); border-radius: 6px; }
.mini-message.unread::after { content: ""; position: absolute; top: 10px; right: 10px; width: 6px; height: 6px; border-radius: 50%; background: #c7484d; }
.mini-message-icon { width: 34px; height: 34px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 5px; background: var(--blue-soft); color: var(--blue); }
.mini-message div { min-width: 0; }
.mini-message strong { font-size: 11px; }
.mini-message p { margin: 5px 14px 5px 0; color: #4b5563; font-size: 9px; line-height: 1.5; }
.mini-message small { color: var(--muted); font-size: 8px; }
.mini-bottom { position: absolute; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: repeat(4,1fr); padding: 8px 5px 12px; background: #fff; border-top: 1px solid var(--line); }
.mini-bottom a { text-align: center; color: var(--muted); font-size: 8px; }
.mini-bottom span { display: block; font-size: 15px; margin-bottom: 2px; }
.mini-bottom a.active { color: var(--blue); }

@media (max-width: 1050px) {
    .stats { grid-template-columns: repeat(2,1fr); }
    .columns { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
    .sidebar { transform: translateX(-100%); transition: .2s; }
    body.menu-open .sidebar { transform: translateX(0); }
    .main-shell { margin-left: 0; }
    .topbar { left: 0; height: auto; min-height: 68px; padding: 10px 14px; flex-wrap: wrap; }
    .menu-button { display: block; }
    .role-switch { order: 3; width: 100%; overflow-x: auto; }
    .role-switch a { flex: 1 0 auto; text-align: center; }
    .top-user { margin-left: auto; }
    .top-user > span:last-child { display: none; }
    .page-content { padding: 128px 14px 28px; }
    .workflow { grid-template-columns: 1fr 1fr; }
    .form-grid { grid-template-columns: 1fr; }
    .page-heading { align-items: flex-start; flex-direction: column; }
    .list-toolbar { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 430px) {
    .stats, .workflow { grid-template-columns: 1fr; }
    .bill { align-items: flex-start; flex-direction: column; }
    .list-toolbar { grid-template-columns: 1fr; }
}