:root {
  --paper: #f7f4ed;
  --paper-deep: #eee9de;
  --card: #fffdf8;
  --ink: #18312c;
  --muted: #6f7b76;
  --line: #ded9cd;
  --green: #1f5d50;
  --green-deep: #16473d;
  --green-soft: #dfece5;
  --coral: #ef765f;
  --coral-soft: #fae4df;
  --blue: #537f9f;
  --blue-soft: #e1edf4;
  --gold: #d4a43f;
  --gold-soft: #f8edcf;
  --danger: #b84b43;
  --shadow: 0 14px 40px rgba(45, 54, 49, 0.08);
  --sidebar: 250px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at 90% 5%, rgba(239, 118, 95, 0.08), transparent 25rem),
    radial-gradient(circle at 55% 100%, rgba(31, 93, 80, 0.06), transparent 32rem),
    var(--paper);
  color: var(--ink);
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  color: inherit;
}

a {
  color: var(--green);
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -4rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: var(--ink);
  color: white;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

.app-shell {
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 30;
  width: var(--sidebar);
  display: flex;
  flex-direction: column;
  padding: 30px 20px 22px;
  border-right: 1px solid rgba(24, 49, 44, 0.08);
  background: rgba(255, 253, 248, 0.86);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 13px;
  background: var(--green);
  color: #fffdf8;
  font-family: Georgia, "Songti SC", serif;
  font-size: 22px;
  font-weight: 700;
  box-shadow: 0 7px 18px rgba(31, 93, 80, 0.22);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 17px;
  letter-spacing: 0.03em;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.13em;
}

.mini-countdown {
  margin: 28px 0 20px;
  padding: 16px;
  border: 1px solid rgba(31, 93, 80, 0.12);
  border-radius: 16px;
  background: var(--green-soft);
}

.mini-countdown span,
.mini-countdown strong {
  display: block;
}

.mini-countdown span {
  margin-bottom: 3px;
  color: var(--green-deep);
  font-size: 12px;
}

.mini-countdown strong {
  font-size: 21px;
  letter-spacing: 0.02em;
}

.nav-list {
  display: grid;
  gap: 6px;
}

.nav-item {
  width: 100%;
  min-height: 46px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: #5a6863;
  text-align: left;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.nav-item:hover {
  background: rgba(31, 93, 80, 0.07);
  color: var(--green-deep);
  transform: translateX(2px);
}

.nav-item.is-active {
  background: var(--green);
  color: white;
  box-shadow: 0 8px 18px rgba(31, 93, 80, 0.18);
}

.nav-icon {
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 9px;
  font-family: "Songti SC", Georgia, serif;
  font-size: 13px;
  opacity: 0.86;
}

.sidebar-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  color: var(--muted);
  font-size: 12px;
}

.offline-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #50a672;
  box-shadow: 0 0 0 4px rgba(80, 166, 114, 0.12);
}

main {
  min-height: 100vh;
  margin-left: var(--sidebar);
  padding: 32px clamp(28px, 5vw, 76px) 72px;
}

.top-actions {
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 34px;
}

.page-kicker {
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.action-row,
.filter-row,
.chip-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.ghost-button,
.primary-button,
.soft-button,
.filter-chip,
.answer-option,
.text-button,
.icon-button {
  border: 0;
  cursor: pointer;
  transition: transform 0.16s ease, background 0.16s ease, border-color 0.16s ease, opacity 0.16s ease;
}

.ghost-button {
  min-height: 37px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 253, 248, 0.7);
  color: #53615c;
  font-size: 12px;
  font-weight: 650;
}

.ghost-button:hover,
.filter-chip:hover,
.soft-button:hover {
  border-color: rgba(31, 93, 80, 0.35);
  background: white;
  transform: translateY(-1px);
}

.primary-button {
  min-height: 42px;
  padding: 10px 17px;
  border-radius: 12px;
  background: var(--green);
  color: white;
  font-weight: 700;
  box-shadow: 0 8px 17px rgba(31, 93, 80, 0.18);
}

.primary-button:hover {
  background: var(--green-deep);
  transform: translateY(-1px);
}

.soft-button {
  min-height: 38px;
  padding: 8px 13px;
  border: 1px solid rgba(31, 93, 80, 0.14);
  border-radius: 10px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 700;
}

.text-button {
  padding: 7px 2px;
  background: transparent;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
}

.mobile-header,
.bottom-nav {
  display: none;
}

.hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(250px, 0.7fr);
  gap: 32px;
  padding: clamp(28px, 5vw, 54px);
  border-radius: 30px;
  background: var(--green);
  color: white;
  box-shadow: 0 20px 48px rgba(31, 93, 80, 0.2);
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero::before {
  width: 330px;
  height: 330px;
  right: -150px;
  top: -180px;
  border: 54px solid rgba(255, 255, 255, 0.06);
}

.hero::after {
  width: 210px;
  height: 210px;
  right: 18%;
  bottom: -170px;
  background: rgba(239, 118, 95, 0.22);
}

.hero-copy,
.countdown-card {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  opacity: 0.72;
}

.hero h1,
.page-heading h1 {
  margin: 0;
  font-family: "Songti SC", "STSong", Georgia, serif;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.hero h1 {
  max-width: 680px;
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1.12;
}

.hero p {
  max-width: 640px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
  line-height: 1.8;
}

.countdown-card {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 220px;
  padding: 25px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(8px);
}

.countdown-number {
  font-family: Georgia, serif;
  font-size: clamp(60px, 8vw, 92px);
  line-height: 0.95;
}

.countdown-label {
  margin-top: 10px;
  font-size: 15px;
  opacity: 0.8;
}

.countdown-date {
  margin-top: 30px;
  padding-top: 15px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 12px;
  opacity: 0.7;
}

.section-block {
  margin-top: 38px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-heading h2 {
  margin: 0;
  font-family: "Songti SC", Georgia, serif;
  font-size: clamp(23px, 3vw, 31px);
}

.section-heading p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.subject-grid,
.stats-grid,
.template-grid,
.phase-grid,
.source-grid {
  display: grid;
  gap: 16px;
}

.subject-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.subject-card,
.stat-card,
.content-card,
.template-card,
.phase-card,
.question-card,
.source-card,
.daily-card {
  border: 1px solid rgba(24, 49, 44, 0.1);
  background: rgba(255, 253, 248, 0.88);
  box-shadow: var(--shadow);
}

.subject-card {
  position: relative;
  overflow: hidden;
  padding: 25px;
  border-radius: var(--radius-lg);
}

.subject-card::after {
  content: attr(data-code);
  position: absolute;
  right: -4px;
  bottom: -30px;
  color: rgba(24, 49, 44, 0.045);
  font-family: Georgia, serif;
  font-size: 112px;
  font-weight: 700;
}

.subject-card-head,
.question-head,
.progress-row,
.phase-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 15px;
}

.subject-code,
.question-badge,
.status-pill,
.score-pill,
.tag,
.phase-date {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 750;
}

.subject-code {
  padding: 6px 10px;
  font-size: 12px;
}

.subject-card.coral .subject-code,
.question-badge.coral {
  background: var(--coral-soft);
  color: #a34333;
}

.subject-card.blue .subject-code,
.question-badge.blue {
  background: var(--blue-soft);
  color: #315f7e;
}

.subject-card h3 {
  margin: 17px 0 5px;
  font-family: "Songti SC", Georgia, serif;
  font-size: 22px;
}

.subject-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.progress-meter {
  height: 7px;
  overflow: hidden;
  margin: 24px 0 10px;
  border-radius: 999px;
  background: var(--paper-deep);
}

.progress-meter > span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--green);
  transition: width 0.4s ease;
}

.subject-card.coral .progress-meter > span {
  background: var(--coral);
}

.subject-card.blue .progress-meter > span {
  background: var(--blue);
}

.progress-label {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12px;
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stat-card {
  padding: 20px;
  border-radius: var(--radius-md);
}

.stat-card span,
.stat-card strong {
  display: block;
}

.stat-card span {
  color: var(--muted);
  font-size: 12px;
}

.stat-card strong {
  margin-top: 8px;
  font-family: Georgia, "Songti SC", serif;
  font-size: 28px;
}

.today-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 16px;
}

.content-card,
.daily-card {
  padding: 24px;
  border-radius: var(--radius-lg);
}

.content-card h3,
.daily-card h3,
.template-card h3,
.phase-card h3 {
  margin: 0;
  font-family: "Songti SC", Georgia, serif;
  font-size: 20px;
}

.check-list,
.plain-list,
.answer-points {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.check-list {
  display: grid;
  gap: 10px;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 11px 12px;
  border-radius: 11px;
  background: var(--paper);
  cursor: pointer;
}

.check-item input {
  width: 17px;
  height: 17px;
  margin-top: 2px;
  accent-color: var(--green);
}

.check-item.is-done span {
  color: var(--muted);
  text-decoration: line-through;
}

.quote-card {
  position: relative;
  overflow: hidden;
  min-height: 100%;
  padding: 25px;
  border-radius: var(--radius-lg);
  background: var(--gold-soft);
  border: 1px solid rgba(212, 164, 63, 0.22);
}

.quote-card::before {
  content: "“";
  position: absolute;
  right: 15px;
  top: -30px;
  color: rgba(126, 88, 17, 0.1);
  font-family: Georgia, serif;
  font-size: 150px;
}

.quote-card p {
  position: relative;
  margin: 40px 0 0;
  color: #6d5521;
  font-family: "Songti SC", Georgia, serif;
  font-size: 20px;
  line-height: 1.75;
}

.quote-card small {
  display: block;
  margin-top: 18px;
  color: #8d7441;
}

.page-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}

.page-heading h1 {
  font-size: clamp(33px, 5vw, 54px);
}

.page-heading p {
  max-width: 620px;
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.subject-tabs {
  display: inline-flex;
  gap: 5px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 253, 248, 0.8);
}

.subject-tab {
  min-width: 105px;
  padding: 10px 14px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 750;
}

.subject-tab.is-active {
  background: var(--green);
  color: white;
}

.exam-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(145px, 1fr));
  gap: 10px;
  margin-bottom: 24px;
}

.exam-strip-item {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 253, 248, 0.72);
}

.exam-strip-item strong,
.exam-strip-item span {
  display: block;
}

.exam-strip-item strong {
  font-size: 15px;
}

.exam-strip-item span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.notice {
  display: flex;
  gap: 12px;
  margin: 18px 0 24px;
  padding: 16px 18px;
  border: 1px solid rgba(239, 118, 95, 0.22);
  border-radius: 14px;
  background: var(--coral-soft);
  color: #823c30;
  font-size: 13px;
  line-height: 1.65;
}

.outline-list {
  display: grid;
  gap: 12px;
}

.outline-item {
  border: 1px solid rgba(24, 49, 44, 0.1);
  border-radius: 17px;
  background: rgba(255, 253, 248, 0.82);
  box-shadow: 0 8px 24px rgba(45, 54, 49, 0.045);
}

.outline-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 19px 21px;
  cursor: pointer;
  list-style: none;
}

.outline-item summary::-webkit-details-marker {
  display: none;
}

.outline-item summary::after {
  content: "+";
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--green-soft);
  color: var(--green);
  font-size: 18px;
}

.outline-item[open] summary::after {
  content: "−";
}

.outline-title {
  font-family: "Songti SC", Georgia, serif;
  font-size: 18px;
  font-weight: 700;
}

.outline-body {
  padding: 0 21px 21px;
  border-top: 1px solid rgba(24, 49, 44, 0.08);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 17px;
}

.tag {
  padding: 5px 9px;
  background: var(--paper-deep);
  color: #59645f;
  font-size: 11px;
}

.plain-list {
  display: grid;
  gap: 9px;
}

.plain-list li,
.answer-points li {
  position: relative;
  padding-left: 18px;
  color: #4e5b56;
  font-size: 14px;
  line-height: 1.72;
}

.plain-list li::before,
.answer-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--coral);
}

.practice-toolbar {
  position: sticky;
  top: 12px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 13px;
  margin-bottom: 18px;
  padding: 12px;
  border: 1px solid rgba(24, 49, 44, 0.1);
  border-radius: 15px;
  background: rgba(247, 244, 237, 0.9);
  backdrop-filter: blur(15px);
}

.filter-chip {
  min-height: 34px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.82);
  color: #5f6c67;
  font-size: 12px;
  font-weight: 700;
}

.filter-chip.is-active {
  border-color: var(--green);
  background: var(--green);
  color: white;
}

.question-list {
  display: grid;
  gap: 16px;
}

.question-card {
  padding: clamp(19px, 3vw, 28px);
  border-radius: var(--radius-lg);
}

.question-card.is-wrong {
  border-color: rgba(184, 75, 67, 0.36);
}

.question-card.is-correct {
  border-color: rgba(31, 93, 80, 0.32);
}

.question-number {
  display: flex;
  align-items: center;
  gap: 9px;
}

.question-badge {
  min-width: 45px;
  padding: 6px 9px;
  font-size: 11px;
}

.score-pill,
.status-pill {
  padding: 5px 9px;
  background: var(--paper-deep);
  color: var(--muted);
  font-size: 11px;
}

.favorite-button {
  width: 35px;
  height: 35px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: #9a9f9c;
  cursor: pointer;
  font-size: 18px;
}

.favorite-button.is-active {
  border-color: rgba(212, 164, 63, 0.4);
  background: var(--gold-soft);
  color: #a87510;
}

.question-stem {
  margin: 20px 0 0;
  font-family: "Songti SC", Georgia, serif;
  font-size: 18px;
  font-weight: 650;
  line-height: 1.75;
  white-space: pre-wrap;
}

.question-prompt {
  margin: 13px 0 0;
  padding: 13px 15px;
  border-left: 3px solid var(--coral);
  border-radius: 0 9px 9px 0;
  background: var(--coral-soft);
  color: #6c443c;
  line-height: 1.65;
}

.answer-options {
  display: grid;
  gap: 9px;
  margin-top: 18px;
}

.answer-option {
  width: 100%;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  color: #41504b;
  text-align: left;
  line-height: 1.55;
}

.answer-option:hover {
  border-color: rgba(31, 93, 80, 0.38);
  background: var(--green-soft);
}

.answer-option.is-selected {
  border-color: var(--blue);
  background: var(--blue-soft);
}

.answer-option.is-correct {
  border-color: var(--green);
  background: var(--green-soft);
  color: var(--green-deep);
}

.answer-option.is-wrong {
  border-color: var(--danger);
  background: #f8dfdd;
  color: #893e38;
}

.question-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.answer-panel {
  margin-top: 18px;
  padding: 18px;
  border: 1px solid rgba(31, 93, 80, 0.16);
  border-radius: 14px;
  background: var(--green-soft);
}

.answer-panel[hidden] {
  display: none;
}

.answer-panel strong {
  display: block;
  color: var(--green-deep);
}

.answer-panel p {
  margin: 9px 0 0;
  color: #3f5b53;
  font-size: 14px;
  line-height: 1.72;
}

.keyword-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 14px;
}

.keyword-row span {
  padding: 6px 9px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.62);
  color: var(--green-deep);
  font-size: 12px;
  font-weight: 700;
}

.draft-box {
  width: 100%;
  min-height: 150px;
  margin-top: 16px;
  padding: 15px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 12px;
  outline: none;
  background: #fffefb;
  color: var(--ink);
  line-height: 1.7;
}

.draft-box:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(31, 93, 80, 0.09);
}

.draft-hint {
  display: flex;
  justify-content: space-between;
  margin-top: 7px;
  color: var(--muted);
  font-size: 11px;
}

.empty-state {
  padding: 48px 25px;
  border: 1px dashed rgba(24, 49, 44, 0.2);
  border-radius: var(--radius-lg);
  color: var(--muted);
  text-align: center;
}

.template-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.template-card {
  padding: 24px;
  border-radius: var(--radius-lg);
}

.template-card .formula {
  margin: 15px 0 0;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--paper);
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 750;
  line-height: 1.55;
}

.phase-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.phase-card {
  padding: 23px;
  border-radius: var(--radius-lg);
}

.phase-card:last-child {
  grid-column: 1 / -1;
  border-color: rgba(239, 118, 95, 0.25);
  background: var(--coral-soft);
}

.phase-date {
  padding: 6px 9px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 11px;
}

.phase-card p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.progress-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
}

.progress-panel {
  padding: 24px;
  border: 1px solid rgba(24, 49, 44, 0.1);
  border-radius: var(--radius-lg);
  background: rgba(255, 253, 248, 0.85);
  box-shadow: var(--shadow);
}

.progress-panel h3 {
  margin: 0 0 16px;
  font-family: "Songti SC", Georgia, serif;
  font-size: 20px;
}

.progress-row {
  padding: 13px 0;
  border-bottom: 1px solid rgba(24, 49, 44, 0.08);
}

.progress-row:last-child {
  border-bottom: 0;
}

.progress-row p,
.progress-row small {
  margin: 0;
}

.progress-row p {
  font-size: 13px;
  line-height: 1.55;
}

.progress-row small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}

.score-ring {
  --value: 0deg;
  width: 142px;
  height: 142px;
  display: grid;
  place-items: center;
  margin: 12px auto 22px;
  border-radius: 50%;
  background: conic-gradient(var(--green) var(--value), var(--paper-deep) 0);
}

.score-ring::before {
  content: "";
  width: 108px;
  height: 108px;
  border-radius: 50%;
  background: var(--card);
}

.score-ring-label {
  position: absolute;
  text-align: center;
}

.score-ring-wrap {
  position: relative;
}

.score-ring-label strong,
.score-ring-label span {
  display: block;
}

.score-ring-label strong {
  font-family: Georgia, serif;
  font-size: 28px;
}

.score-ring-label span {
  color: var(--muted);
  font-size: 11px;
}

.danger-button {
  width: 100%;
  padding: 10px 13px;
  border: 1px solid rgba(184, 75, 67, 0.25);
  border-radius: 10px;
  background: #fbebe9;
  color: var(--danger);
  cursor: pointer;
  font-weight: 700;
}

.source-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.source-card {
  padding: 17px;
  border-radius: 13px;
  color: #4f5d58;
  font-size: 13px;
  line-height: 1.55;
}

.source-card a {
  font-weight: 700;
}

.toast {
  position: fixed;
  z-index: 100;
  left: 50%;
  bottom: 25px;
  max-width: min(90vw, 520px);
  padding: 12px 17px;
  border-radius: 12px;
  background: var(--ink);
  color: white;
  box-shadow: 0 14px 34px rgba(24, 49, 44, 0.23);
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 15px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.noscript {
  position: fixed;
  inset: 20px;
  z-index: 999;
  display: grid;
  place-items: center;
  padding: 30px;
  border-radius: 20px;
  background: white;
  color: var(--danger);
}

@media (max-width: 1080px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero {
    grid-template-columns: minmax(0, 1fr) 240px;
  }

  .today-grid,
  .progress-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  :root {
    --sidebar: 0px;
  }

  body {
    padding-bottom: calc(72px + env(safe-area-inset-bottom));
  }

  .sidebar {
    inset: 64px 12px auto 12px;
    width: auto;
    max-height: calc(100vh - 90px);
    display: none;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: 0 20px 60px rgba(24, 49, 44, 0.2);
  }

  .sidebar.is-open {
    display: flex;
  }

  .sidebar .brand,
  .sidebar .mini-countdown,
  .sidebar .sidebar-footer {
    display: none;
  }

  .mobile-header {
    position: sticky;
    top: 0;
    z-index: 25;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
    padding: 10px 16px;
    border-bottom: 1px solid rgba(24, 49, 44, 0.08);
    background: rgba(247, 244, 237, 0.9);
    backdrop-filter: blur(18px);
  }

  .brand.compact .brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 11px;
    font-size: 19px;
  }

  .brand.compact strong {
    font-size: 15px;
  }

  .icon-button {
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--card);
    font-size: 20px;
  }

  main {
    margin-left: 0;
    padding: 19px 16px 40px;
  }

  .top-actions {
    margin-bottom: 20px;
  }

  .page-kicker {
    max-width: 45vw;
    line-height: 1.5;
  }

  .bottom-nav {
    position: fixed;
    inset: auto 0 0 0;
    z-index: 40;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    min-height: calc(62px + env(safe-area-inset-bottom));
    padding: 7px 8px env(safe-area-inset-bottom);
    border-top: 1px solid rgba(24, 49, 44, 0.1);
    background: rgba(255, 253, 248, 0.95);
    backdrop-filter: blur(18px);
  }

  .bottom-nav-item {
    display: grid;
    place-items: center;
    gap: 2px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
  }

  .bottom-nav-item span {
    font-family: "Songti SC", Georgia, serif;
    font-size: 17px;
  }

  .bottom-nav-item small {
    font-size: 10px;
  }

  .bottom-nav-item.is-active {
    color: var(--green);
    background: var(--green-soft);
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 30px 24px;
    border-radius: 24px;
  }

  .countdown-card {
    min-height: 0;
  }

  .subject-grid,
  .template-grid,
  .phase-grid,
  .source-grid {
    grid-template-columns: 1fr;
  }

  .phase-card:last-child {
    grid-column: auto;
  }

  .page-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .subject-tabs {
    width: 100%;
  }

  .subject-tab {
    flex: 1;
  }

  .practice-toolbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .question-stem {
    font-size: 17px;
  }
}

@media (max-width: 520px) {
  .top-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .action-row {
    width: 100%;
  }

  .ghost-button {
    flex: 1;
  }

  .hero h1 {
    font-size: 36px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stat-card {
    padding: 16px;
  }

  .stat-card strong {
    font-size: 24px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .subject-card,
  .content-card,
  .daily-card,
  .template-card,
  .phase-card,
  .question-card,
  .progress-panel {
    border-radius: 18px;
  }

  .question-head {
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* Version 2: syllabus-to-question learning and full-paper practice */

.path-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.path-card {
  position: relative;
  min-height: 235px;
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  padding: 28px;
  overflow: hidden;
  border: 1px solid rgba(24, 49, 44, 0.1);
  border-radius: 24px;
  background: var(--card);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.path-card::after {
  content: "";
  position: absolute;
  right: -45px;
  bottom: -70px;
  width: 190px;
  height: 190px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.32);
}

.path-card.knowledge {
  background: linear-gradient(145deg, #e4efe8, #f9fbf7);
}

.path-card.papers {
  background: linear-gradient(145deg, #f8e2dc, #fff9f6);
}

.path-card:hover,
.lesson-card:hover,
.paper-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 48px rgba(45, 54, 49, 0.12);
}

.path-index {
  margin-bottom: auto;
  color: var(--green);
  font-family: Georgia, serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.path-card strong {
  margin-top: 35px;
  font-family: "Songti SC", Georgia, serif;
  font-size: 29px;
}

.path-card p {
  max-width: 440px;
  margin: 10px 0 20px;
  color: #56645e;
  font-size: 14px;
  line-height: 1.7;
}

.path-card > span:last-child {
  color: var(--green-deep);
  font-size: 13px;
  font-weight: 750;
}

.subject-card-links {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
}

.panel-kicker {
  margin-bottom: 8px;
  color: var(--coral);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.knowledge-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.55fr);
  gap: 22px;
  margin-top: 24px;
  align-items: start;
}

.syllabus-panel,
.signal-card,
.requirement-card,
.paper-instruction,
.paper-result,
.paper-header,
.paper-card,
.concept-card,
.lesson-card,
.archive-row,
.unavailable-box {
  border: 1px solid rgba(24, 49, 44, 0.1);
  background: var(--card);
  box-shadow: var(--shadow);
}

.syllabus-panel {
  position: sticky;
  top: 18px;
  padding: 24px;
  border-radius: 22px;
}

.syllabus-panel h2,
.lesson-library h2 {
  margin: 0;
  font-family: "Songti SC", Georgia, serif;
}

.syllabus-list {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.syllabus-item {
  border-top: 1px solid var(--line);
}

.syllabus-item:first-child {
  border-top: 0;
}

.syllabus-item summary {
  position: relative;
  padding: 14px 24px 14px 0;
  cursor: pointer;
  list-style: none;
  font-size: 14px;
  font-weight: 750;
  line-height: 1.5;
}

.syllabus-item summary::-webkit-details-marker {
  display: none;
}

.syllabus-item summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 13px;
  color: var(--green);
  font-size: 19px;
}

.syllabus-item[open] summary::after {
  content: "−";
}

.syllabus-item ul {
  display: grid;
  gap: 8px;
  margin: 12px 0 18px;
  padding-left: 18px;
  color: #57645f;
  font-size: 12px;
  line-height: 1.65;
}

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.lesson-card {
  min-height: 235px;
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  padding: 22px;
  border-radius: 19px;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.lesson-number {
  color: #a5aca8;
  font-family: Georgia, serif;
  font-size: 12px;
}

.lesson-module,
.source-version,
.paper-status {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 10px;
  font-weight: 750;
}

.lesson-card .lesson-module {
  margin: 18px 0 10px;
}

.lesson-card strong {
  font-family: "Songti SC", Georgia, serif;
  font-size: 19px;
  line-height: 1.45;
}

.lesson-card p {
  margin: 10px 0 20px;
  color: #66726e;
  font-size: 12px;
  line-height: 1.7;
}

.lesson-meta {
  margin-top: auto;
  color: var(--green);
  font-size: 11px;
  font-weight: 700;
}

.back-button {
  margin-bottom: 16px;
  padding: 9px 0;
  border: 0;
  background: transparent;
  color: var(--green);
  cursor: pointer;
  font-size: 13px;
  font-weight: 750;
}

.lesson-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: end;
  padding: clamp(28px, 5vw, 48px);
  border-radius: 28px;
  background: linear-gradient(135deg, #214f45, #17352f);
  color: white;
  box-shadow: var(--shadow);
}

.lesson-hero.coral {
  background: linear-gradient(135deg, #6e3932, #2e3833);
}

.lesson-hero.blue {
  background: linear-gradient(135deg, #315468, #19363f);
}

.lesson-hero .lesson-module {
  background: rgba(255, 255, 255, 0.13);
  color: white;
}

.lesson-hero h1 {
  max-width: 780px;
  margin: 16px 0 12px;
  font-family: "Songti SC", Georgia, serif;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.18;
}

.lesson-hero p {
  max-width: 760px;
  margin: 0;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
}

.lesson-count {
  display: grid;
  grid-template-columns: auto auto;
  gap: 5px 12px;
  min-width: 142px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
}

.lesson-count strong {
  font-size: 23px;
}

.lesson-count span {
  align-self: center;
  color: rgba(255, 255, 255, 0.65);
  font-size: 10px;
}

.requirement-card {
  display: grid;
  grid-template-columns: 135px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  margin-top: 18px;
  padding: 19px 24px;
  border-left: 4px solid var(--coral);
  border-radius: 15px;
}

.requirement-card span {
  color: var(--coral);
  font-size: 12px;
  font-weight: 800;
}

.requirement-card p {
  margin: 0;
  line-height: 1.7;
}

.lesson-detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: 22px;
  align-items: start;
}

.lesson-section {
  margin-bottom: 0;
}

.concept-stack {
  display: grid;
  gap: 15px;
}

.concept-card {
  padding: 24px;
  border-radius: 20px;
}

.concept-title {
  display: flex;
  align-items: center;
  gap: 13px;
}

.concept-title > span {
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--ink);
  color: white;
  font-family: Georgia, serif;
  font-size: 13px;
}

.concept-title h3 {
  margin: 0;
  font-family: "Songti SC", Georgia, serif;
  font-size: 21px;
}

.concept-detail {
  margin: 17px 0;
  color: #46534e;
  line-height: 1.8;
}

.concept-example,
.concept-trap {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr);
  gap: 12px;
  padding: 13px 15px;
  border-radius: 12px;
}

.concept-example {
  background: var(--green-soft);
}

.concept-trap {
  margin-top: 9px;
  background: var(--coral-soft);
}

.concept-example strong,
.concept-trap strong {
  font-size: 11px;
}

.concept-example p,
.concept-trap p {
  margin: 0;
  font-size: 12px;
  line-height: 1.65;
}

.signal-card {
  position: sticky;
  top: 18px;
  margin-top: 64px;
  padding: 21px;
  border-radius: 18px;
}

.signal-card h3 {
  margin: 0 0 15px;
  font-family: "Songti SC", Georgia, serif;
  font-size: 19px;
}

.signal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.signal-list span {
  padding: 7px 9px;
  border: 1px solid rgba(31, 93, 80, 0.14);
  border-radius: 9px;
  background: var(--green-soft);
  color: var(--green-deep);
  font-size: 11px;
  font-weight: 700;
}

.signal-card p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.6;
}

.linked-practice {
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.paper-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.paper-card {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  min-height: 390px;
  padding: 26px;
  border-radius: 23px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.paper-card.coral {
  background: linear-gradient(180deg, #fffdf8, #fff5f1);
}

.paper-card.blue {
  background: linear-gradient(180deg, #fffdf8, #f3f8fb);
}

.paper-card-top {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.paper-status {
  background: var(--gold-soft);
  color: #825e16;
}

.paper-card h2 {
  margin: 32px 0 2px;
  font-family: Georgia, "Songti SC", serif;
  font-size: 42px;
}

.paper-card h2 small {
  font-family: inherit;
  font-size: 18px;
  font-weight: 500;
}

.paper-card h3 {
  margin: 0 0 15px;
  font-family: "Songti SC", Georgia, serif;
  font-size: 19px;
}

.paper-card > p {
  min-height: 66px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.paper-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 20px 0;
}

.paper-facts span {
  padding: 6px 8px;
  border-radius: 8px;
  background: var(--paper-deep);
  color: #606b67;
  font-size: 10px;
  font-weight: 700;
}

.paper-card .progress-meter,
.paper-card .progress-label,
.paper-card .primary-button {
  width: 100%;
}

.paper-card .primary-button {
  margin-top: 18px;
}

.archive-list {
  display: grid;
  gap: 9px;
}

.archive-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 17px 19px;
  border-radius: 14px;
  box-shadow: none;
}

.archive-row strong,
.archive-row span {
  display: inline-block;
}

.archive-row span {
  margin-left: 9px;
  padding: 4px 7px;
  border-radius: 99px;
  background: var(--paper-deep);
  color: var(--muted);
  font-size: 10px;
}

.archive-row p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.archive-row a,
.paper-header a {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 700;
  text-decoration: none;
}

.notice.important {
  border-color: rgba(212, 164, 63, 0.35);
  background: var(--gold-soft);
}

.paper-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: center;
  padding: clamp(25px, 5vw, 42px);
  border-radius: 25px;
}

.paper-header h1 {
  margin: 15px 0 9px;
  font-family: "Songti SC", Georgia, serif;
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.25;
}

.paper-header p {
  max-width: 760px;
  margin: 0 0 12px;
  color: var(--muted);
  line-height: 1.7;
}

.paper-timer-card {
  width: 145px;
  min-height: 145px;
  display: grid;
  place-items: center;
  align-content: center;
  border-radius: 50%;
  background: var(--ink);
  color: white;
  text-align: center;
}

.paper-timer-card strong {
  font-family: Georgia, serif;
  font-size: 43px;
  line-height: 1;
}

.paper-timer-card span,
.paper-timer-card small {
  display: block;
}

.paper-timer-card span {
  font-size: 12px;
}

.paper-timer-card small {
  max-width: 90px;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 9px;
}

.paper-instruction {
  display: flex;
  gap: 14px;
  margin-top: 16px;
  padding: 16px 19px;
  border-radius: 13px;
  box-shadow: none;
}

.paper-instruction strong {
  flex: 0 0 auto;
  color: var(--coral);
}

.paper-instruction span {
  color: #56625e;
  line-height: 1.6;
}

.paper-result {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 26px;
  margin-top: 18px;
  padding: 24px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--green-soft), #fffdf8);
}

.result-score {
  padding-right: 25px;
  border-right: 1px solid rgba(31, 93, 80, 0.15);
}

.result-score span,
.result-score strong,
.result-score em {
  display: block;
}

.result-score span {
  color: var(--muted);
  font-size: 11px;
}

.result-score strong {
  margin: 7px 0;
  color: var(--green-deep);
  font-family: Georgia, serif;
  font-size: 40px;
}

.result-score strong small {
  font-size: 18px;
}

.result-score em {
  color: var(--green);
  font-size: 11px;
  font-style: normal;
  font-weight: 750;
}

.result-details {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.result-details > div {
  padding: 12px;
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.65);
}

.result-details span,
.result-details strong,
.result-details small {
  display: block;
}

.result-details span,
.result-details small {
  color: var(--muted);
  font-size: 9px;
}

.result-details strong {
  margin: 4px 0;
  font-size: 22px;
}

.paper-result > p {
  grid-column: 2;
  margin: 0;
  color: #5c6964;
  font-size: 11px;
  line-height: 1.65;
}

.question-jump {
  position: sticky;
  top: 10px;
  z-index: 12;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 18px 0;
  padding: 10px;
  border: 1px solid rgba(24, 49, 44, 0.1);
  border-radius: 14px;
  background: rgba(247, 244, 237, 0.92);
  backdrop-filter: blur(16px);
}

.question-jump button {
  width: 31px;
  height: 31px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--muted);
  cursor: pointer;
  font-size: 10px;
}

.question-jump button.is-answered {
  border-color: var(--green);
  background: var(--green);
  color: white;
}

.question-jump button.is-unavailable {
  border-style: dashed;
  background: var(--paper-deep);
  color: #9b9d98;
}

.paper-sheet {
  display: grid;
  gap: 34px;
}

.paper-section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 13px;
  padding: 0 4px;
}

.paper-section-title h2 {
  margin: 0;
  font-family: "Songti SC", Georgia, serif;
  font-size: 25px;
}

.paper-section-title span {
  color: var(--muted);
  font-size: 11px;
}

.source-version {
  background: var(--blue-soft);
  color: #355b73;
}

.answer-option:disabled {
  cursor: default;
  opacity: 1;
}

.checked-label {
  display: inline-flex;
  align-items: center;
  color: var(--green);
  font-size: 12px;
  font-weight: 750;
}

.unavailable-box {
  display: grid;
  gap: 4px;
  margin-top: 17px;
  padding: 15px;
  border-style: dashed;
  border-radius: 12px;
  background: var(--paper-deep);
  box-shadow: none;
}

.unavailable-box strong {
  color: #785e2b;
}

.unavailable-box span {
  color: var(--muted);
  font-size: 11px;
}

.question-card.is-unavailable {
  border-style: dashed;
}

.subjective-answer {
  display: block;
}

.answer-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  margin-bottom: 14px;
}

.answer-panel-head span {
  color: var(--green);
  font-size: 10px;
  font-weight: 750;
}

.self-check-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 17px;
}

.self-check {
  cursor: pointer;
}

.self-check input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.self-check span {
  display: block;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: white;
  color: #596560;
  font-size: 10px;
}

.self-check.is-checked span {
  border-color: var(--green);
  background: var(--green);
  color: white;
}

.self-score-note {
  margin: 15px 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(31, 93, 80, 0.12);
  color: var(--muted);
  font-size: 10px;
  line-height: 1.6;
}

.paper-submit-bar {
  position: sticky;
  z-index: 14;
  bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin: 28px 0 5px;
  padding: 14px;
  border: 1px solid rgba(24, 49, 44, 0.12);
  border-radius: 17px;
  background: rgba(255, 253, 248, 0.94);
  box-shadow: 0 14px 42px rgba(45, 54, 49, 0.16);
  backdrop-filter: blur(18px);
}

.paper-submit-bar > div {
  margin-right: auto;
}

.paper-submit-bar > div strong,
.paper-submit-bar > div span {
  display: block;
}

.paper-submit-bar > div strong {
  font-size: 18px;
}

.paper-submit-bar > div span {
  color: var(--muted);
  font-size: 9px;
}

@media (max-width: 1000px) {
  .knowledge-layout,
  .lesson-detail-layout {
    grid-template-columns: 1fr;
  }

  .syllabus-panel,
  .signal-card {
    position: static;
  }

  .signal-card {
    margin-top: 0;
  }

  .signal-list {
    max-width: 620px;
  }

  .result-details {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .path-grid,
  .paper-grid,
  .lesson-grid {
    grid-template-columns: 1fr;
  }

  .path-card {
    min-height: 210px;
  }

  .lesson-hero,
  .paper-header {
    grid-template-columns: 1fr;
  }

  .lesson-count {
    width: 100%;
  }

  .paper-timer-card {
    width: 112px;
    min-height: 112px;
    border-radius: 20px;
  }

  .paper-timer-card strong {
    font-size: 34px;
  }

  .requirement-card,
  .concept-example,
  .concept-trap,
  .paper-result {
    grid-template-columns: 1fr;
  }

  .result-score {
    padding: 0 0 18px;
    border-right: 0;
    border-bottom: 1px solid rgba(31, 93, 80, 0.15);
  }

  .paper-result > p {
    grid-column: 1;
  }

  .archive-row,
  .paper-instruction,
  .answer-panel-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .paper-submit-bar {
    bottom: 76px;
  }
}

@media (max-width: 520px) {
  .path-card,
  .paper-card,
  .concept-card,
  .syllabus-panel {
    padding: 20px;
    border-radius: 18px;
  }

  .lesson-hero,
  .paper-header {
    padding: 24px 20px;
    border-radius: 20px;
  }

  .lesson-hero h1,
  .paper-header h1 {
    font-size: 31px;
  }

  .question-number {
    flex-wrap: wrap;
  }

  .question-jump {
    position: static;
  }

  .paper-submit-bar {
    align-items: stretch;
    flex-wrap: wrap;
  }

  .paper-submit-bar > div {
    width: 100%;
  }

  .paper-submit-bar .primary-button,
  .paper-submit-bar .ghost-button {
    flex: 1;
  }

  .result-details {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}