:root {
  --parent-canvas: #f4f7fb;
  --parent-surface: #ffffff;
  --parent-line: #e2e8f1;
  --parent-text: #20324e;
  --parent-muted: #71819a;
  --parent-brand: #0f8b73;
  --parent-brand-soft: #e7f5f0;
  --parent-blue: #3f55f5;
  --parent-blue-soft: #edf0ff;
  --parent-orange: #c87911;
  --parent-orange-soft: #fff4df;
  --parent-purple: #7654d6;
  --parent-shadow: 0 8px 24px rgba(31, 55, 88, .06);
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--parent-text);
  background: var(--parent-canvas);
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--parent-canvas); }
body { margin: 0; min-width: 0; background: var(--parent-canvas); }
button, a { font: inherit; }
button { cursor: pointer; }

.student-verify-page { display: grid; place-items: center; min-height: 100vh; padding: 24px 16px; background: var(--parent-canvas); }
.student-verify-card { width: 100%; max-width: 420px; min-width: 0; padding: 28px 24px 24px; border: 1px solid var(--parent-line); border-radius: 14px; background: var(--parent-surface); box-shadow: var(--parent-shadow); }
.student-verify-mark { display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 18px; border-radius: 12px; color: #fff; background: var(--parent-brand); font-size: 22px; font-weight: 700; }
.student-verify-card h1 { margin: 0; color: var(--parent-text); font-size: 22px; line-height: 1.25; }
.student-verify-card > p { margin: 10px 0 22px; color: var(--parent-muted); font-size: 12px; line-height: 1.65; }
.student-verify-card form { display: grid; gap: 14px; }
.student-verify-card label { display: grid; gap: 7px; color: var(--parent-text); font-size: 12px; }
.student-verify-card input { width: 100%; min-height: 42px; padding: 0 12px; border: 1px solid #cbd5e2; border-radius: 7px; color: var(--parent-text); background: #fff; font-size: 13px; outline: none; }
.student-verify-card input:focus { border-color: var(--parent-blue); box-shadow: 0 0 0 3px rgba(63, 85, 245, .12); }
.student-verify-card .full-button { margin-top: 2px; min-height: 43px; }
.readonly-banner { margin: 0 0 12px; padding: 10px 12px; border: 1px solid #bfdbfe; border-radius: 8px; color: #1e40af; background: #eff6ff; font-size: 12px; line-height: 1.5; }
.consultation-entries { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--parent-line); }
.consultation-entries h3 { margin: 0 0 10px; color: var(--parent-text); font-size: 14px; }
.consultation-entry-list { display: grid; gap: 10px; }
.consultation-entry { padding: 11px 12px; border: 1px solid var(--parent-line); border-radius: 8px; background: #fbfdff; }
.consultation-entry > div { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.consultation-entry strong { color: var(--parent-text); font-size: 13px; }
.consultation-entry small { color: var(--parent-muted); font-size: 11px; }
.consultation-entry p { margin: 7px 0 0; color: var(--parent-muted); font-size: 12px; line-height: 1.65; }
.student-verify-error { margin: 0; padding: 9px 10px; border-radius: 6px; color: #b54752; background: #fff0f1; font-size: 11px; line-height: 1.45; }
.student-verify-note { display: block; margin-top: 17px; color: var(--parent-muted); font-size: 10px; line-height: 1.5; }
.like-button.read-only { cursor: default; }

.parent-shell { min-height: 100vh; padding-bottom: calc(72px + env(safe-area-inset-bottom)); }
.parent-topbar { position: sticky; z-index: 5; top: 0; display: flex; align-items: center; justify-content: space-between; height: 58px; padding: 0 17px; border-bottom: 1px solid var(--parent-line); background: rgba(255, 255, 255, .94); backdrop-filter: blur(12px); }
.parent-brand { display: flex; align-items: center; gap: 9px; }
.parent-brand-mark { display: grid; place-items: center; width: 31px; height: 31px; border-radius: 8px; color: #fff; background: var(--parent-brand); font-size: 16px; font-weight: 700; }
.parent-brand strong { display: block; color: var(--parent-text); font-size: 14px; line-height: 1.05; }
.parent-brand small { display: block; margin-top: 3px; color: var(--parent-muted); font-size: 10px; }
.parent-topbar-actions { display: flex; align-items: center; gap: 12px; }
.icon-action { position: relative; width: 31px; height: 31px; border: 0; color: #586983; background: transparent; font-size: 18px; }
.icon-action i { position: absolute; top: 1px; right: -3px; display: grid; place-items: center; min-width: 15px; height: 15px; padding: 0 3px; border: 2px solid #fff; border-radius: 50%; color: #fff; background: #f05d69; font-size: 8px; font-style: normal; }
.parent-avatar { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; color: var(--parent-brand); background: var(--parent-brand-soft); font-size: 12px; font-weight: 700; }
.parent-avatar.tiny { width: 25px; height: 25px; font-size: 10px; }
.parent-titlebar { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 17px 17px 13px; }
.parent-titlebar span { color: var(--parent-muted); font-size: 10px; }
.parent-titlebar h1 { margin: 3px 0 0; color: var(--parent-text); font-size: 21px; line-height: 1.1; letter-spacing: -.02em; }
.child-switcher { display: flex; align-items: center; gap: 6px; max-width: 154px; min-height: 33px; padding: 3px 7px 3px 4px; border: 1px solid var(--parent-line); border-radius: 7px; color: #50627c; background: #fff; font-size: 11px; }
.child-switcher span:nth-child(2) { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.child-switcher b { color: #9ca9ba; font-size: 13px; font-weight: 400; }
.parent-main { width: min(100%, 960px); margin: 0 auto; padding: 0 15px 20px; }
.eyebrow { display: block; margin-bottom: 6px; color: var(--parent-muted); font-size: 10px; }
.welcome-card { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 139px; padding: 19px; border: 1px solid var(--parent-line); border-radius: 10px; background: var(--parent-surface); box-shadow: var(--parent-shadow); }
.welcome-card h2 { margin: 0; color: var(--parent-text); font-size: 22px; line-height: 1.25; }
.welcome-card p { margin: 7px 0 0; color: var(--parent-muted); font-size: 11px; }
.primary-button, .secondary-button, .icon-text-button { display: inline-flex; align-items: center; justify-content: center; min-height: 36px; padding: 0 13px; border: 1px solid var(--parent-line); border-radius: 6px; color: #586983; background: #fff; font-size: 11px; white-space: nowrap; }
.primary-button { border-color: var(--parent-blue); color: #fff; background: var(--parent-blue); box-shadow: 0 4px 10px rgba(63, 85, 245, .18); }
.primary-button b { margin-left: 4px; font-weight: 700; }
.primary-button.small-button { min-height: 32px; padding: 0 11px; }
.secondary-button:hover, .icon-text-button:hover { border-color: #aebcf6; color: var(--parent-blue); background: var(--parent-blue-soft); }
.full-button { width: 100%; margin-top: 13px; }
.parent-panel { border: 1px solid var(--parent-line); border-radius: 9px; background: var(--parent-surface); box-shadow: var(--parent-shadow); }
.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 9px; margin-top: 11px; }
.metric-card { display: flex; flex-direction: column; min-height: 108px; padding: 15px; border: 1px solid var(--parent-line); border-radius: 8px; background: var(--parent-surface); box-shadow: var(--parent-shadow); }
.metric-card span { color: var(--parent-muted); font-size: 10px; }
.metric-card strong { margin-top: 9px; color: var(--parent-text); font-size: 23px; line-height: 1; }
.metric-card small { margin-top: auto; color: var(--parent-muted); font-size: 10px; line-height: 1.4; }
.metric-card.accent-green strong { color: var(--parent-brand); }
.metric-card.accent-orange strong { color: var(--parent-orange); }
.metric-card.accent-purple strong { color: var(--parent-purple); }
.overview-columns { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(260px, 1fr); gap: 11px; margin-top: 11px; }
.attention-panel, .class-preview, .quick-panel { padding: 17px; }
.panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 9px; }
.panel-heading h2 { margin: 0; color: var(--parent-text); font-size: 15px; }
.panel-heading p { margin: 5px 0 0; color: var(--parent-muted); font-size: 10px; line-height: 1.45; }
.panel-count { display: grid; place-items: center; min-width: 23px; height: 23px; border-radius: 50%; color: var(--parent-brand); background: var(--parent-brand-soft); font-size: 11px; }
.attention-list { margin-top: 13px; }
.attention-row { display: flex; align-items: center; gap: 10px; width: 100%; min-height: 59px; padding: 9px 0; border: 0; border-top: 1px solid #edf0f4; color: inherit; background: transparent; text-align: left; }
.attention-row:first-child { border-top: 0; }
.attention-row:hover .attention-copy strong { color: var(--parent-blue); }
.attention-icon { display: grid; place-items: center; flex: 0 0 auto; width: 30px; height: 30px; border-radius: 7px; color: var(--parent-orange); background: var(--parent-orange-soft); font-size: 16px; }
.attention-row:nth-child(2) .attention-icon { color: var(--parent-brand); background: var(--parent-brand-soft); }
.attention-row:nth-child(3) .attention-icon { color: var(--parent-blue); background: var(--parent-blue-soft); }
.attention-copy { display: flex; min-width: 0; flex: 1; flex-direction: column; gap: 3px; }
.attention-copy strong { color: var(--parent-text); font-size: 12px; }
.attention-copy small { overflow: hidden; color: var(--parent-muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.attention-row > b { color: var(--parent-brand); font-size: 13px; font-weight: 600; }
.class-preview { min-height: 242px; }
.consultation-preview { display: flex; flex-direction: column; align-items: flex-start; gap: 7px; margin-top: 33px; }
.consultation-preview strong { color: var(--parent-text); font-size: 13px; }
.consultation-preview p { margin: 0; color: var(--parent-muted); font-size: 11px; line-height: 1.5; }
.status-chip, .category-tag, .sync-label, .subject-tag { display: inline-flex; align-items: center; min-height: 22px; padding: 0 7px; border-radius: 4px; font-size: 10px; white-space: nowrap; }
.status-chip.success { color: var(--parent-brand); background: var(--parent-brand-soft); }
.status-chip.warning { color: var(--parent-orange); background: var(--parent-orange-soft); }
.status-chip.info, .category-tag, .subject-tag { color: var(--parent-blue); background: var(--parent-blue-soft); }
.sync-label { color: var(--parent-brand); background: var(--parent-brand-soft); }
.link-button { padding: 0; border: 0; color: var(--parent-blue); background: transparent; font-size: 11px; }
.empty-mini { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 170px; color: var(--parent-muted); text-align: center; }
.empty-mini > span { color: var(--parent-brand); font-size: 24px; }
.empty-mini p { margin: 11px 0 9px; font-size: 11px; }
.quick-panel { margin-top: 11px; }
.quick-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; margin-top: 14px; }
.quick-item { display: flex; flex-direction: column; align-items: flex-start; gap: 9px; min-height: 79px; padding: 12px; border: 1px solid var(--parent-line); border-radius: 7px; color: var(--parent-text); background: #fbfcfe; text-align: left; }
.quick-item:hover { border-color: #bdc8fb; background: var(--parent-blue-soft); }
.quick-item span { color: var(--parent-blue); font-size: 18px; }
.quick-item strong { font-size: 11px; font-weight: 600; }
.subpage { padding-bottom: 6px; }
.subpage > .parent-panel { overflow: hidden; }
.subpage .parent-panel > .panel-heading, .subpage > .parent-panel > .panel-heading { padding: 17px; border-bottom: 1px solid var(--parent-line); }
.learning-intro { margin-bottom: 11px; padding: 19px; }
.learning-intro h2 { margin: 0; font-size: 20px; line-height: 1.3; }
.learning-intro p { margin: 7px 0 0; color: var(--parent-muted); font-size: 11px; }
.tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.tool-card { display: flex; align-items: center; gap: 10px; min-height: 80px; padding: 12px; border: 1px solid var(--parent-line); border-radius: 8px; color: inherit; background: var(--parent-surface); box-shadow: var(--parent-shadow); text-align: left; }
.tool-card:hover { border-color: #bec8fb; background: #fbfcff; }
.tool-icon { display: grid; place-items: center; flex: 0 0 auto; width: 33px; height: 33px; border-radius: 8px; color: var(--parent-blue); background: var(--parent-blue-soft); font-size: 18px; }
.tool-card:nth-child(3n) .tool-icon { color: var(--parent-brand); background: var(--parent-brand-soft); }
.tool-card > span:nth-child(2) { display: flex; min-width: 0; flex: 1; flex-direction: column; gap: 4px; }
.tool-card strong { color: var(--parent-text); font-size: 12px; }
.tool-card small { overflow: hidden; color: var(--parent-muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.tool-card > b { color: #a4afc0; font-size: 19px; font-weight: 400; }
.week-controls { display: flex; align-items: center; justify-content: center; gap: 15px; padding: 13px 15px; color: var(--parent-text); font-size: 12px; }
.square-button { display: grid; place-items: center; width: 31px; height: 31px; border: 1px solid var(--parent-line); border-radius: 6px; color: #596a84; background: #fff; font-size: 20px; line-height: 1; }
.schedule-scroll { overflow-x: auto; padding: 0 15px; -webkit-overflow-scrolling: touch; }
.schedule-table { width: 720px; border-collapse: collapse; table-layout: fixed; }
.schedule-table th, .schedule-table td { min-width: 119px; padding: 11px 10px; border: 1px solid var(--parent-line); text-align: left; vertical-align: top; }
.schedule-table thead th { height: 38px; color: var(--parent-muted); background: #f8faff; font-size: 10px; font-weight: 600; }
.schedule-table tbody th { width: 120px; color: var(--parent-muted); background: #fbfcfe; font-size: 10px; font-weight: 500; line-height: 1.45; }
.schedule-table td { height: 78px; background: #fff; }
.schedule-table td strong, .schedule-table td small { display: block; }
.schedule-table td strong { color: var(--parent-blue); font-size: 11px; }
.schedule-table td small { margin-top: 5px; color: var(--parent-muted); font-size: 9px; line-height: 1.35; }
.schedule-table td.self-study strong { color: #71819a; font-weight: 500; }
.panel-footnote { margin: 11px 17px 16px; color: var(--parent-muted); font-size: 10px; }
.homework-list, .courseware-list, .activity-list, .pending-list, .class-post-list, .grade-list { display: flex; flex-direction: column; gap: 9px; padding: 13px 15px 16px; }
.homework-card { padding: 14px; border: 1px solid var(--parent-line); border-radius: 8px; background: #fff; }
.homework-card-top { display: flex; align-items: center; justify-content: space-between; }
.homework-card h3 { margin: 10px 0 5px; color: var(--parent-text); font-size: 13px; }
.homework-card p { margin: 0; color: var(--parent-muted); font-size: 10px; }
.progress-line { display: flex; align-items: center; gap: 8px; margin-top: 13px; }
.progress-line > span { height: 6px; flex: 1; overflow: hidden; border-radius: 5px; background: #e8edf4; }
.progress-line i { display: block; height: 100%; border-radius: inherit; background: var(--parent-brand); }
.progress-line b { min-width: 31px; color: var(--parent-muted); font-size: 10px; font-weight: 500; text-align: right; }
.courseware-card { display: flex; align-items: center; gap: 10px; min-height: 71px; padding: 11px; border: 1px solid var(--parent-line); border-radius: 8px; }
.file-icon { display: grid; place-items: center; flex: 0 0 auto; width: 38px; height: 38px; border-radius: 7px; color: var(--parent-blue); background: var(--parent-blue-soft); font-size: 9px; font-weight: 700; }
.courseware-copy { display: flex; min-width: 0; flex: 1; flex-direction: column; gap: 4px; }
.courseware-copy strong { overflow: hidden; color: var(--parent-text); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.courseware-copy small { overflow: hidden; color: var(--parent-muted); font-size: 9px; text-overflow: ellipsis; white-space: nowrap; }
.icon-text-button { min-height: 30px; padding: 0 10px; color: var(--parent-blue); }
.activity-card { display: flex; align-items: center; gap: 12px; padding: 13px; border: 1px solid var(--parent-line); border-radius: 8px; }
.activity-date { display: flex; flex: 0 0 auto; flex-direction: column; align-items: center; justify-content: center; width: 53px; height: 53px; border-radius: 7px; color: var(--parent-brand); background: var(--parent-brand-soft); }
.activity-date strong { font-size: 15px; line-height: 1; }
.activity-date small { margin-top: 5px; font-size: 9px; }
.activity-copy { min-width: 0; flex: 1; }
.activity-copy h3 { overflow: hidden; margin: 7px 0 4px; color: var(--parent-text); font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.activity-copy p { margin: 0; overflow: hidden; color: var(--parent-muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.activity-copy .progress-track { margin-top: 8px; }
.activity-action { flex: 0 0 auto; }
.notice-list { display: grid; gap: 10px; padding: 14px; }
.notice-card { display: flex; align-items: center; gap: 12px; padding: 13px; border: 1px solid var(--parent-line); border-radius: 8px; background: #fff; }
.notice-card.unread { border-color: #b9c7ff; background: #fbfcff; }
.notice-card-copy { min-width: 0; flex: 1; }
.notice-card-meta { display: flex; align-items: center; gap: 6px; }
.notice-unread { color: #b45309; font-size: 10px; }
.notice-card h3 { overflow: hidden; margin: 7px 0 4px; color: var(--parent-text); font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.notice-card p { margin: 0 0 5px; overflow: hidden; color: var(--parent-muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.notice-card small { color: var(--parent-muted); font-size: 9px; }
.pending-card { display: flex; align-items: center; gap: 11px; padding: 13px; border: 1px solid var(--parent-line); border-radius: 8px; }
.pending-icon { display: grid; place-items: center; flex: 0 0 auto; width: 37px; height: 37px; border-radius: 7px; color: var(--parent-brand); background: var(--parent-brand-soft); font-size: 19px; }
.pending-copy { min-width: 0; flex: 1; }
.pending-copy h3 { overflow: hidden; margin: 6px 0 4px; color: var(--parent-text); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.pending-copy p { margin: 0; color: var(--parent-muted); font-size: 10px; }
.class-post { display: flex; align-items: center; gap: 11px; padding: 0; border: 1px solid var(--parent-line); border-radius: 8px; overflow: hidden; }
.post-media { display: flex; flex: 0 0 83px; flex-direction: column; align-items: center; justify-content: center; align-self: stretch; min-height: 108px; color: var(--parent-blue); background: #eaf0ff; }
.post-media span { font-size: 30px; line-height: 1; }
.post-media small { margin-top: 9px; font-size: 10px; }
.post-copy { min-width: 0; flex: 1; padding: 14px 0; }
.post-copy h3 { overflow: hidden; margin: 7px 0 5px; color: var(--parent-text); font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.post-copy p { margin: 0 0 9px; overflow: hidden; color: var(--parent-muted); font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
.post-copy > small { color: var(--parent-muted); font-size: 9px; }
.like-button { align-self: center; margin: 0 12px 0 0; padding: 8px 0; border: 0; color: var(--parent-blue); background: transparent; font-size: 11px; }
.like-button.liked { color: #e55678; }
.score-summary { display: grid; grid-template-columns: 1.55fr 1fr 1fr; margin-bottom: 11px; overflow: hidden; border-radius: 9px; color: #fff; background: #2c4f7b; }
.score-summary > div { min-height: 118px; padding: 18px; border-right: 1px solid rgba(255, 255, 255, .18); }
.score-summary > div:last-child { border-right: 0; }
.score-summary span, .score-summary small { display: block; color: rgba(255, 255, 255, .72); font-size: 10px; }
.score-summary strong { display: block; margin-top: 8px; font-size: 28px; line-height: 1; }
.score-summary strong small { display: inline; margin-left: 3px; font-size: 11px; }
.score-summary em { display: block; margin-top: 9px; color: #8be2ba; font-size: 10px; font-style: normal; }
.grade-row { display: grid; grid-template-columns: minmax(0, 1.65fr) .5fr .9fr auto; align-items: center; gap: 8px; min-height: 59px; padding: 10px 11px; border: 1px solid var(--parent-line); border-radius: 7px; }
.grade-row > div { min-width: 0; }
.grade-row strong, .grade-row small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.grade-row strong { color: var(--parent-text); font-size: 11px; }
.grade-row small, .grade-row > span:not(.status-chip) { margin-top: 4px; color: var(--parent-muted); font-size: 9px; }
.grade-row > b { color: var(--parent-text); font-size: 16px; }
.grade-row > span:not(.status-chip) { margin-top: 0; }
.empty-state { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 230px; color: var(--parent-muted); text-align: center; }
.empty-state > span { color: var(--parent-brand); font-size: 29px; }
.empty-state p { margin: 11px 0; font-size: 11px; }
.empty-page { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 420px; padding: 30px 20px; color: var(--parent-muted); text-align: center; }
.empty-icon { color: var(--parent-brand); font-size: 31px; }
.empty-page h2 { margin: 22px 0 8px; color: #586983; font-size: 14px; }
.empty-page p { max-width: 290px; margin: 0 0 18px; font-size: 11px; line-height: 1.7; }
.dimension-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; padding: 15px; }
.dimension-list > div, .summary-box { padding: 12px; border: 1px solid var(--parent-line); border-radius: 7px; background: #fbfcfe; }
.dimension-list span, .summary-box span { color: var(--parent-muted); font-size: 10px; }
.dimension-list p, .summary-box p { margin: 7px 0 0; color: var(--parent-text); font-size: 11px; line-height: 1.55; }
.summary-box { margin: 0 15px 15px; }
.profile-parent { padding: 20px; }
.profile-identity { display: flex; align-items: center; gap: 13px; padding-bottom: 20px; border-bottom: 1px solid var(--parent-line); }
.large-avatar { display: grid; place-items: center; width: 54px; height: 54px; border-radius: 50%; color: var(--parent-brand); background: var(--parent-brand-soft); font-size: 20px; font-weight: 700; }
.profile-identity span:not(.large-avatar) { color: var(--parent-muted); font-size: 10px; }
.profile-identity h2 { margin: 5px 0 4px; color: var(--parent-text); font-size: 17px; }
.profile-identity p { margin: 0; color: var(--parent-muted); font-size: 10px; }
.profile-links { display: flex; flex-direction: column; padding-top: 4px; }
.profile-links button, .profile-links a { display: flex; align-items: center; justify-content: space-between; min-height: 49px; padding: 0; border: 0; border-bottom: 1px solid #edf0f4; color: var(--parent-text); background: transparent; font-size: 12px; text-align: left; text-decoration: none; }
.profile-links b { color: #a0abba; font-size: 17px; font-weight: 400; }
.parent-bottom-nav { position: fixed; z-index: 10; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: repeat(5, 1fr); height: calc(62px + env(safe-area-inset-bottom)); padding: 4px 7px env(safe-area-inset-bottom); border-top: 1px solid var(--parent-line); background: rgba(255, 255, 255, .96); backdrop-filter: blur(12px); }
.bottom-nav-item { display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 3px; min-width: 0; padding: 4px 2px; border: 0; color: #8a98ac; background: transparent; }
.bottom-nav-item span { font-size: 18px; line-height: 1; }
.bottom-nav-item small { font-size: 9px; }
.bottom-nav-item.active { color: var(--parent-brand); font-weight: 600; }
.parent-modal-backdrop { position: fixed; z-index: 30; inset: 0; display: flex; align-items: flex-end; justify-content: center; padding: 0; background: rgba(25, 38, 58, .45); }
.parent-modal { width: min(100%, 560px); max-height: calc(100vh - 42px); overflow-y: auto; padding: 20px 17px calc(18px + env(safe-area-inset-bottom)); border-radius: 16px 16px 0 0; background: #fff; box-shadow: 0 -12px 40px rgba(25, 38, 58, .18); }
.modal-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.modal-heading h2 { margin: 9px 0 0; color: var(--parent-text); font-size: 17px; line-height: 1.35; }
.close-button { width: 30px; height: 30px; border: 0; border-radius: 6px; color: #8b98aa; background: transparent; font-size: 23px; line-height: 1; }
.modal-copy { margin: 17px 0 12px; color: var(--parent-muted); font-size: 11px; line-height: 1.6; }
.signature-box { display: flex; flex-direction: column; gap: 7px; padding: 15px; border: 1px dashed #b7c3d2; border-radius: 8px; background: #fbfcfe; }
.signature-box span, .signature-box small { color: var(--parent-muted); font-size: 10px; }
.signature-box strong { color: var(--parent-text); font-size: 15px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 19px; }
.courseware-preview { margin-top: 17px; padding: 15px; border: 1px solid var(--parent-line); border-radius: 8px; background: #fbfcfe; }
.courseware-preview p { margin: 0; color: var(--parent-text); font-size: 11px; line-height: 1.6; }
.preview-lines { display: flex; flex-direction: column; gap: 9px; margin: 20px 0; }
.preview-lines span { display: block; height: 7px; border-radius: 4px; background: #e2e8f1; }
.preview-lines span:nth-child(2) { width: 82%; }
.preview-lines span:nth-child(3) { width: 64%; }
.preview-lines span:nth-child(4) { width: 91%; }
.courseware-preview small { color: var(--parent-muted); font-size: 10px; }
.parent-toast { position: fixed; z-index: 40; right: 16px; bottom: calc(77px + env(safe-area-inset-bottom)); left: 16px; padding: 11px 14px; border-radius: 7px; color: #fff; background: #278d68; box-shadow: 0 8px 20px rgba(25, 43, 75, .2); font-size: 11px; text-align: center; }
.rich-content-view { display: flex; flex-direction: column; gap: 12px; margin: 14px 0 18px; }
.rich-content-text { margin: 0; color: #4c5d76; font-size: 13px; line-height: 1.75; white-space: pre-wrap; }
.rich-content-image { display: block; width: 100%; max-height: 420px; border-radius: 8px; object-fit: contain; background: #f3f6fa; }
.activity-action { display: flex; align-items: center; justify-content: flex-end; gap: 7px; }
.children-switch-list { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.child-switch-option { display: flex; align-items: center; gap: 10px; width: 100%; padding: 11px 12px; border: 1px solid var(--parent-line); border-radius: 8px; color: var(--parent-text); background: #fff; text-align: left; }
.child-switch-option.active { border-color: var(--parent-brand); background: var(--parent-brand-soft); }
.child-switch-option > span:nth-child(2) { display: flex; flex: 1; flex-direction: column; gap: 3px; min-width: 0; }
.child-switch-option small { color: var(--parent-muted); font-size: 10px; }
.child-switch-option b { color: var(--parent-brand); font-size: 10px; font-weight: 600; }
.parent-service-error { min-height: 56vh; padding: 60px 24px; text-align: center; }
.parent-service-error p { max-width: 320px; margin: 10px auto 18px; color: var(--parent-muted); font-size: 12px; line-height: 1.6; }

@media (min-width: 700px) {
  body { padding: 18px 0; }
  .parent-shell { width: min(100%, 980px); min-height: calc(100vh - 36px); margin: 0 auto; overflow: hidden; border: 1px solid var(--parent-line); border-radius: 13px; background: var(--parent-canvas); box-shadow: 0 18px 60px rgba(31, 55, 88, .08); }
  .parent-topbar { position: relative; }
  .parent-bottom-nav { position: relative; width: 100%; height: 62px; padding-bottom: 4px; }
  .parent-main { padding-bottom: 25px; }
  .parent-modal-backdrop { align-items: center; padding: 20px; }
  .parent-modal { border-radius: 14px; padding-bottom: 20px; }
}

@media (max-width: 650px) {
  .welcome-card { align-items: flex-start; flex-direction: column; }
  .welcome-card .primary-button { width: 100%; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .overview-columns { grid-template-columns: 1fr; }
  .quick-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .class-preview { min-height: 220px; }
  .score-summary { grid-template-columns: 1.25fr 1fr; }
  .score-summary > div:first-child { grid-column: 1 / -1; min-height: 105px; }
  .score-summary > div:nth-child(2), .score-summary > div:nth-child(3) { min-height: 91px; }
  .grade-row { grid-template-columns: minmax(0, 1fr) .55fr auto; }
  .grade-row > span:not(.status-chip) { grid-column: 1 / 2; margin-top: 0; }
  .grade-row > .status-chip { grid-column: 3; grid-row: 1 / span 2; }
}

@media (max-width: 410px) {
  .parent-titlebar { padding-right: 13px; padding-left: 13px; }
  .parent-main { padding-right: 11px; padding-left: 11px; }
  .parent-topbar { padding-right: 13px; padding-left: 13px; }
  .welcome-card, .attention-panel, .class-preview, .quick-panel, .learning-intro, .profile-parent { padding-right: 14px; padding-left: 14px; }
  .tool-grid { grid-template-columns: 1fr; }
  .activity-card { align-items: flex-start; flex-wrap: wrap; }
  .activity-action { width: 100%; padding-left: 65px; }
  .activity-action .primary-button, .activity-action .status-chip { width: 100%; }
  .pending-card { align-items: flex-start; flex-wrap: wrap; }
  .pending-card > .primary-button, .pending-card > .status-chip { width: 100%; margin-left: 48px; }
  .dimension-list { grid-template-columns: 1fr; }
}