:root {
  --ink: #17211f;
  --muted: #65584c;
  --line: #dfc7ad;
  --paper: #fffaf4;
  --soft: #eed9c4;
  --blue: #2563eb;
  --green: #d35400;
  --accent: #6b8e23;
  --amber: #6b8e23;
  --rose: #be3b57;
  --shadow: 0 18px 48px rgba(99, 67, 39, 0.13);
  --page-pad: clamp(22px, 4vw, 56px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #eed9c4;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

input::placeholder,
textarea::placeholder {
  color: rgba(101, 88, 76, 0.26);
  font-weight: 400;
  opacity: 1;
}

button {
  cursor: pointer;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto minmax(180px, 1fr);
  align-items: center;
  gap: 18px;
  min-height: 72px;
  padding: 12px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid rgba(211, 84, 0, 0.22);
  background: rgba(255, 250, 244, 0.94);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: start;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--green);
  color: white;
  font-weight: 800;
}

.brand-logo {
  display: block;
  width: 42px;
  height: 42px;
  object-fit: contain;
  flex: 0 0 auto;
}

.brand strong {
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.desktop-nav,
.header-actions,
.hero-actions,
.panel-head,
.detail-actions,
.section-heading.with-actions,
.carousel-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.desktop-nav a,
.mobile-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 650;
}

.desktop-nav a:hover,
.mobile-nav a:hover {
  color: var(--accent);
}

.desktop-nav {
  justify-self: center;
  gap: clamp(28px, 4vw, 56px);
}

.desktop-nav a {
  color: var(--ink);
  font-size: 17px;
  font-weight: 720;
}

.header-actions {
  justify-self: end;
}

.mobile-nav {
  display: none;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  position: sticky;
  top: 72px;
  z-index: 9;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: white;
  box-shadow: 0 12px 24px rgba(23, 33, 31, 0.08);
}

.mobile-nav.is-open {
  display: grid;
}

.mobile-nav a {
  display: grid;
  place-items: center;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  color: var(--ink);
}

.mobile-nav a:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.primary-btn,
.secondary-btn,
.ghost-btn,
.icon-btn {
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  font-weight: 760;
}

.primary-btn {
  padding: 0 18px;
  background: var(--green);
  color: white;
}

.secondary-btn {
  padding: 0 18px;
  border: 1px solid var(--line);
  background: white;
  color: var(--ink);
}

.primary-btn:disabled,
.secondary-btn:disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

.is-locked {
  position: relative;
}

.is-locked img {
  filter: saturate(0.72);
}

.is-locked small {
  color: #8a6d1d;
  font-weight: 760;
}

.locked-panel {
  display: grid;
  gap: 10px;
  border: 1px dashed rgba(138, 109, 29, 0.42);
  border-radius: 8px;
  padding: 18px;
  background: #fff9e8;
}

.locked-panel h2,
.locked-panel h3,
.locked-panel p {
  margin: 0;
}

.locked-panel p {
  color: var(--muted);
  line-height: 1.7;
}

#featuredCarousel .locked-panel {
  background: white;
}

#newsGrid .compact-news-card {
  background: var(--soft);
}

.text-btn {
  min-height: 28px;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--accent);
  font-weight: 820;
}

.ghost-btn {
  padding: 0 12px;
  background: transparent;
  color: var(--accent);
}

.member-login-btn {
  color: var(--ink);
  font-size: 16px;
  font-weight: 760;
}

.member-login-btn:hover {
  color: var(--accent);
}

.icon-btn {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 74px;
  padding: 0 12px;
  background: var(--soft);
  color: var(--ink);
}

.icon-btn span {
  font-size: 18px;
  line-height: 1;
}

.icon-btn strong {
  font-size: 14px;
}

.icon-btn.visible {
  display: inline-flex;
  font-size: 28px;
  line-height: 1;
}

.compact {
  min-height: 38px;
  padding: 0 14px;
}

.full {
  width: 100%;
}

main {
  width: min(1280px, calc(100% - 56px));
  min-height: calc(100vh - 72px);
  margin: 0 auto;
  background: var(--paper);
  box-shadow: 0 0 0 1px rgba(211, 84, 0, 0.12);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 18px;
  width: min(1280px, calc(100% - 56px));
  margin: 0 auto;
  padding: 18px clamp(18px, 4vw, 56px);
  border-top: 1px solid rgba(211, 84, 0, 0.22);
  background: rgba(255, 250, 244, 0.96);
  color: var(--muted);
}

.site-footer div {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-width: 0;
}

.site-footer > div:first-child {
  flex: 0 0 auto;
}

.site-footer strong {
  color: var(--ink);
  white-space: nowrap;
}

.site-footer nav {
  display: flex;
  flex: 1 1 480px;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 14px;
}

.site-footer a {
  color: var(--muted);
  font-weight: 650;
  text-decoration: none;
}

.site-footer a.icp-link {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.site-footer a.police-beian-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}

.police-beian-link img {
  display: block;
  width: 18px;
  height: 18px;
  object-fit: contain;
  flex: 0 0 18px;
}

.site-footer a:hover {
  color: var(--accent);
}

.site-footer .footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.view {
  display: none;
  padding: var(--page-pad);
}

.view.is-active {
  display: block;
}

.legal-page {
  max-width: 900px;
  margin: 0 auto;
}

.legal-page h1 {
  margin: 8px 0 22px;
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.05;
  letter-spacing: 0;
}

.legal-card {
  padding: clamp(22px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  box-shadow: var(--shadow);
}

.legal-card h2 {
  margin: 0 0 10px;
  font-size: 22px;
}

.legal-card h2:not(:first-child) {
  margin-top: 28px;
}

.legal-card p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.page-return-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px var(--page-pad) 0;
}

.page-return-bar > button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 18px;
  background: white;
  font-size: 16px;
  font-weight: 820;
}

.page-return-bar #globalHome {
  color: var(--accent);
}

.page-return-bar[hidden] {
  display: none;
}

.campus-carousel {
  position: relative;
  overflow: hidden;
  margin: calc(var(--page-pad) * -1) calc(var(--page-pad) * -1) 34px;
  min-height: clamp(210px, 28vw, 360px);
  background: #101827;
}

.campus-track {
  position: relative;
  min-height: clamp(210px, 28vw, 360px);
}

.campus-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 420ms ease;
}

.campus-slide.is-active {
  opacity: 1;
}

.campus-slide img {
  width: 100%;
  height: 100%;
  min-height: clamp(210px, 28vw, 360px);
  object-fit: cover;
}

.campus-dots {
  position: absolute;
  right: clamp(18px, 4vw, 56px);
  bottom: clamp(18px, 3vw, 36px);
  z-index: 2;
  display: flex;
  gap: 8px;
}

.campus-dots button {
  width: 34px;
  height: 4px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.48);
}

.campus-dots button.is-active {
  background: white;
}

.news-lead {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.news-list-panel h1,
.page-title h1,
.auth-shell h1 {
  max-width: 760px;
  margin: 12px 0;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.08;
}

.news-list-panel p,
.auth-shell p,
.split-section p,
.lesson-meta p {
  max-width: 640px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.eyebrow,
.section-heading span {
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
}

.news-list-panel,
.news-feature {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.06);
}

.more-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

.panel-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.panel-title-row .secondary-btn {
  flex: 0 0 auto;
  margin-top: 2px;
}

.home-section-title {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.2;
}

.home-section-title::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--accent);
  transform: rotate(45deg);
}

.news-list-panel {
  padding: clamp(16px, 2vw, 22px);
}

.news-list-panel h1:not(.home-section-title) {
  margin: 4px 0 6px;
  font-size: clamp(22px, 2.4vw, 30px);
}

.news-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 380px));
  justify-content: center;
  gap: 14px;
  margin-top: 10px;
}

.news-list article {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-height: 118px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.news-list article > img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px;
  background: var(--soft);
}

.news-list article > div {
  min-width: 0;
}

.news-list article.is-active {
  border-color: var(--line);
  background: white;
}

.news-list span,
.news-feature span,
.news-card span {
  color: var(--accent);
  font-size: 13px;
  font-weight: 850;
}

.news-list h3 {
  margin: 2px 0;
  font-size: 17px;
  line-height: 1.35;
}

.news-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
}

.news-feature img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 5.2;
  object-fit: cover;
}

.news-feature {
  cursor: pointer;
}

.news-feature div {
  padding: 10px 12px;
}

.news-feature h2 {
  margin: 5px 0;
  font-size: 22px;
}

.news-feature p {
  margin: 0 0 8px;
  color: var(--muted);
  line-height: 1.5;
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.quiz-bank-layout {
  grid-template-columns: minmax(280px, 0.42fr) minmax(0, 1fr);
}

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

.quiz-filter-bar {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 180px 150px auto;
  gap: 10px;
  margin: 18px 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.quiz-filter-bar input,
.quiz-filter-bar select {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  background: var(--paper);
  color: var(--ink);
}

.quiz-library-card {
  display: grid;
  grid-template-columns: minmax(220px, 0.42fr) minmax(0, 1fr);
  gap: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: white;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.05);
}

.quiz-library-card h2 {
  margin: 8px 0;
}

.quiz-library-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.quiz-library-items {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.quiz-library-items button {
  display: grid;
  gap: 4px;
  min-height: 72px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--paper);
  color: var(--ink);
  text-align: left;
}

.quiz-library-items span {
  color: var(--muted);
  font-size: 13px;
}

.member-portal {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.member-menu,
.member-course-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.05);
}

.member-menu {
  display: grid;
  gap: 8px;
  padding: 18px;
}

.member-profile {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding-bottom: 14px;
}

.member-profile small {
  grid-column: 2;
  color: var(--muted);
}

.member-avatar {
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  overflow: hidden;
  background: white;
  border: 1px solid var(--line);
}

.member-avatar img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.member-menu button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  padding: 0 14px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  font-weight: 760;
}

.member-menu button.is-active {
  background: #eef4ff;
  color: #2456d9;
}

.member-menu button.member-logout {
  margin-top: 8px;
  border: 1px solid rgba(190, 59, 87, 0.22);
  background: #fff0f3;
  color: var(--rose);
}

.member-course-panel {
  padding: 20px 28px 28px;
}

.member-panel-head {
  margin-bottom: 10px;
}

.member-panel-head h1 {
  margin: 6px 0 0;
  font-size: 28px;
}

.member-course-list {
  display: grid;
}

.member-learning-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 24px;
  align-items: start;
}

.member-learning-main,
.member-quiz-panel {
  min-width: 0;
}

.member-learning-main > h2,
.member-quiz-head {
  margin: 0 0 10px;
}

.member-quiz-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: #fffaf4;
}

.member-quiz-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.member-quiz-head strong {
  color: var(--accent-strong);
}

.member-quiz-list {
  display: grid;
  gap: 8px;
}

.member-quiz-row {
  display: grid;
  gap: 4px;
  width: 100%;
  border: 1px solid rgba(219, 190, 160, 0.8);
  border-radius: 8px;
  padding: 10px 12px;
  background: white;
  color: var(--ink);
  text-align: left;
}

.member-quiz-row strong {
  font-size: 15px;
  line-height: 1.35;
}

.member-quiz-row span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.member-quiz-row:hover {
  border-color: rgba(18, 128, 92, 0.36);
  background: #f0faf5;
}

.member-course-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

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

.member-course-row img {
  width: 180px;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  object-fit: cover;
}

.practice-portal {
  max-width: 1220px;
  margin: 0 auto;
}

.practice-panel {
  min-height: 520px;
}

.practice-row img {
  width: 132px;
}

.practice-row {
  grid-template-columns: 132px minmax(0, 1fr) auto;
}

.practice-row.is-locked {
  background: #fffaf4;
}

.practice-row.is-locked h2 {
  color: #5d5148;
}

.member-course-row h2,
.member-course-row p,
.member-empty h2,
.member-empty p {
  margin: 0;
}

.member-course-row h2 {
  font-size: 19px;
}

.member-course-row p,
.member-empty p {
  margin-top: 8px;
  color: var(--muted);
}

.member-empty {
  display: grid;
  gap: 12px;
  padding: 28px 0;
}

.member-empty.compact {
  padding: 12px 0;
}

.member-settings-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  max-width: 760px;
  padding-top: 14px;
}

.member-settings-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 800;
}

.member-settings-form input {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 13px;
  color: var(--ink);
  font: inherit;
}

.member-settings-form button,
.member-settings-form .form-message {
  grid-column: 1 / -1;
}

.article-detail {
  max-width: 900px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.article-detail > button {
  margin: 18px 18px 0;
}

.article-detail img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.article-body {
  padding: clamp(22px, 4vw, 46px);
}

.article-body h1 {
  margin: 10px 0 14px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.15;
}

.article-body p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.9;
}

.article-summary {
  color: var(--ink) !important;
  font-weight: 720;
}

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

.news-index-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: white;
  color: var(--ink);
  text-align: left;
}

.news-index-item img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px;
}

.news-index-content {
  min-width: 0;
  display: grid;
  gap: 14px;
  padding-top: 18px;
}

.news-index-head {
  display: flex;
  align-items: baseline;
  gap: 26px;
  min-width: 0;
}

.news-index-item span {
  color: var(--accent);
  font-weight: 850;
  white-space: nowrap;
}

.news-index-item strong {
  font-size: 20px;
  min-width: 0;
  overflow-wrap: anywhere;
}

.news-index-item small {
  color: var(--muted);
  line-height: 1.6;
  max-width: 720px;
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}

.news-feature h2 {
  margin: 5px 0;
  font-size: clamp(20px, 2vw, 24px);
  line-height: 1.18;
}

.news-feature p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.section {
  margin-top: 40px;
}

.section-heading {
  margin-bottom: 12px;
}

.section-heading h2,
.split-section h2,
.quiz-panel h2 {
  margin: 8px 0 0;
  font-size: clamp(26px, 3vw, 38px);
}

.news-list-panel .home-section-title,
.section-heading .home-section-title {
  margin: 0;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.2;
}

.feature-grid,
.course-grid,
.category-grid,
.news-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-card,
.course-card,
.category-card,
.news-card,
.quiz-panel,
.form-card,
.admin-main,
.admin-sidebar {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.06);
}

.feature-card {
  padding: 20px;
}

.feature-card p,
.course-card p,
.news-card p,
.quiz-panel p,
.admin-panel p {
  color: var(--muted);
  line-height: 1.7;
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--soft);
  color: var(--green);
  font-weight: 900;
}

.section-heading.with-actions {
  justify-content: space-between;
}

.category-card {
  padding: 20px;
}

.category-card h3 {
  margin: 0 0 14px;
  font-size: 21px;
}

.major-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.major-tags button {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 12px;
  background: var(--soft);
  color: var(--ink);
  font-weight: 720;
}

.featured-course-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.news-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 380px));
  justify-content: center;
  gap: 14px;
}

#view-home .news-list,
#view-home .news-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  justify-content: stretch;
}

.news-card {
  overflow: hidden;
}

.compact-news-card {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-height: 118px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: white;
}

.clickable-news-card {
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.clickable-news-card:hover,
.clickable-news-card:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(23, 33, 31, 0.1);
  outline: 2px solid rgba(37, 99, 235, 0.26);
  outline-offset: 2px;
}

.compact-news-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px;
  background: var(--soft);
}

.compact-news-card h3 {
  display: -webkit-box;
  overflow: hidden;
  margin: 4px 0;
  line-height: 1.42;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.news-thumb {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.news-card div:last-child {
  padding: 18px;
}

.news-card h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.35;
}

.program-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 20px;
  align-items: start;
}

.program-main,
.program-bank {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.06);
}

.program-main {
  padding: clamp(20px, 3vw, 34px);
}

.program-bank {
  position: sticky;
  top: 92px;
  padding: 20px;
}

.program-bank h2 {
  margin: 6px 0 8px;
}

.program-bank p {
  color: var(--muted);
  line-height: 1.7;
}

.sidebar-block {
  display: grid;
  gap: 10px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.sidebar-block h3 {
  margin: 0;
  font-size: 17px;
}

.sidebar-list {
  gap: 8px;
}

.subject-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.subject-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.subject-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.subject-card div {
  display: grid;
  gap: 10px;
  padding: 16px;
}

.subject-card span {
  color: var(--accent);
  font-size: 13px;
  font-weight: 850;
}

.subject-card h2 {
  margin: 0;
}

.subject-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.program-quiz-group {
  display: grid;
  gap: 8px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.program-quiz-group h3 {
  margin: 0;
  font-size: 17px;
}

.program-quiz-group details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.program-quiz-group summary {
  cursor: pointer;
  padding: 10px 12px;
  font-weight: 800;
}

.program-quiz-group details div {
  display: grid;
  gap: 8px;
  padding: 0 10px 10px;
}

.program-quiz-group button {
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--ink);
  text-align: left;
  padding: 0 10px;
}

.quiz-module-card {
  display: grid;
  gap: 6px;
  width: 100%;
  min-height: 76px;
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--paper);
  color: var(--ink);
  text-align: left;
}

.quiz-module-card strong {
  font-size: 18px;
}

.quiz-module-card span {
  color: var(--muted);
  line-height: 1.5;
}

.quiz-module-card:hover {
  border-color: rgba(18, 128, 92, 0.36);
  background: #f0faf5;
}

.quiz-more-btn {
  width: 100%;
  min-height: 42px;
  margin-top: 12px;
  border: 1px solid rgba(215, 86, 0, 0.24);
  border-radius: 8px;
  background: #fff7ed;
  color: var(--accent-strong);
  font-weight: 850;
}

.quiz-more-btn:hover {
  background: #ffe8d4;
  border-color: rgba(215, 86, 0, 0.42);
}

.course-directory-list {
  display: grid;
  gap: 8px;
}

.course-directory-list button {
  width: 100%;
}

.side-action {
  display: grid;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 440px);
  gap: 24px;
  align-items: center;
  padding: 28px;
  border-block: 1px solid var(--line);
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.metric-row div {
  padding: 18px;
  border-radius: 8px;
  background: var(--soft);
}

.metric-row strong {
  display: block;
  color: var(--green);
  font-size: 34px;
}

.metric-row span {
  color: var(--muted);
}

.page-title {
  margin-bottom: 22px;
}

.page-title-simple {
  margin-bottom: 18px;
}

.page-title-simple h1 {
  max-width: none;
  margin: 0;
  font-size: clamp(30px, 3vw, 42px);
  line-height: 1.18;
}

.article-content {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.9;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.article-image-gallery {
  display: grid;
  gap: 18px;
  margin: 24px 0 28px;
}

.article-detail .article-image-gallery img {
  width: 100%;
  height: auto;
  aspect-ratio: auto;
  border-radius: 8px;
  object-fit: contain;
}

.course-card {
  overflow: hidden;
}

.course-library {
  display: grid;
  gap: 20px;
}

.course-center-layout {
  display: grid;
}

.course-center-main {
  border: 0;
  padding: 0;
  background: transparent;
  box-shadow: none;
}

.course-filter-panel {
  display: grid;
  gap: 18px;
  padding: 24px 26px;
  border: 0;
  border-radius: 8px;
  background: white;
}

.course-filter-row {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 12px;
  align-items: start;
}

.course-filter-row strong {
  padding-top: 8px;
}

.course-filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.course-filter-options button {
  min-height: 36px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0 13px;
  background: transparent;
  color: var(--ink);
  font-weight: 780;
}

.course-filter-options button.is-active {
  border-color: rgba(37, 99, 235, 0.12);
  background: rgba(37, 99, 235, 0.1);
  color: var(--blue);
}

.quiz-library-scope-row {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.course-sort-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.course-sort-bar > button {
  min-height: 46px;
  border: 0;
  padding: 0 22px;
  background: white;
  color: var(--ink);
  font-weight: 780;
}

.course-sort-bar > button:first-child {
  border-radius: 999px 0 0 999px;
}

.course-sort-bar > button:nth-child(5) {
  border-radius: 0 999px 999px 0;
}

.course-sort-bar > button.is-active {
  color: var(--blue);
}

.course-pay-options {
  display: flex;
  gap: 22px;
  margin-left: auto;
  color: var(--muted);
  font-weight: 760;
}

.course-pay-options label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.course-pay-options input {
  width: 18px;
  height: 18px;
}

.course-market-card {
  display: grid;
  overflow: hidden;
  border: 0;
  border-radius: 8px;
  padding: 0;
  background: white;
  color: var(--ink);
  text-align: left;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.04);
}

.course-market-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(23, 33, 31, 0.08);
}

.course-market-card .course-card-thumb {
  aspect-ratio: 16 / 9;
}

.course-market-card-body {
  display: grid;
  gap: 6px;
  padding: 10px 11px 13px;
}

.course-market-card-body h3 {
  margin: 0;
  min-height: 46px;
  font-size: 16px;
  line-height: 1.42;
}

.course-market-card-body strong {
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
}

.course-market-card-body small {
  color: #9a9a9a;
  font-size: 12px;
  font-weight: 760;
}

.course-market-card .course-card-tags span {
  border-radius: 6px;
  padding: 3px 7px;
  background: rgba(23, 33, 31, 0.72);
  color: white;
  font-size: 12px;
}

.quiz-market-card .course-card-thumb-fallback {
  background: linear-gradient(135deg, #4f7c65, #d85a05);
}

.quiz-folder-card .course-card-thumb-fallback {
  position: relative;
  overflow: visible;
  margin-top: 8px;
  border-radius: 6px 6px 10px 10px;
  background: linear-gradient(135deg, #547d65, #ba6b1d);
}

.quiz-folder-card {
  align-self: start;
}

.quiz-folder-card .course-card-thumb {
  aspect-ratio: 4 / 3;
  padding-bottom: 44px;
}

.quiz-folder-card .course-card-thumb-fallback strong {
  font-size: 18px;
  line-height: 1.35;
}

.quiz-folder-card .course-card-thumb-fallback .quiz-folder-action {
  position: absolute;
  right: 12px;
  bottom: 10px;
  left: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font-size: 12px;
  font-weight: 850;
}

.quiz-folder-card:not(.is-locked) .course-card-thumb-fallback .quiz-folder-action {
  background: var(--accent);
  color: white;
}

.quiz-folder-card .course-card-thumb-fallback::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 12px;
  width: 42%;
  height: 12px;
  border-radius: 6px 6px 0 0;
  background: #547d65;
}

.course-card-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  background: white;
  color: var(--ink);
  font-size: 13px;
  font-weight: 850;
}

.course-card-action.is-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.course-result-summary {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--muted);
}

.course-result-summary strong {
  color: var(--green);
  font-size: 30px;
}

.course-library-group {
  display: grid;
  gap: 14px;
}

.course-library-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}

.quiz-folder-grid {
  grid-template-columns: repeat(auto-fill, minmax(240px, 260px));
}

.quiz-compact-panel {
  display: grid;
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: white;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.06);
}

.quiz-compact-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.quiz-compact-head h2 {
  margin: 0;
  font-size: 24px;
}

.quiz-compact-head p {
  margin: 6px 0 0;
  color: var(--danger);
  font-weight: 800;
}

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

.quiz-compact-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 120px auto;
  align-items: center;
  gap: 16px;
  border-radius: 8px;
  padding: 12px 18px;
  background: #f6f6f6;
}

.quiz-compact-row strong {
  min-width: 0;
  overflow-wrap: anywhere;
}

.quiz-compact-row span {
  color: var(--muted);
}

.quiz-compact-row.is-locked {
  opacity: 0.82;
}

.course-library-card {
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: white;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.06);
}

.course-library-card span {
  color: var(--accent);
  font-size: 13px;
  font-weight: 850;
}

.course-library-card h3 {
  margin: 0;
  font-size: 24px;
}

.course-library-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.course-list-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.06);
}

.course-card-thumb {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--soft);
}

.course-card-thumb-fallback {
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 18px;
  color: white;
  background: linear-gradient(135deg, var(--green), var(--blue));
}

.course-card-thumb-fallback strong {
  font-size: 24px;
}

.course-card-thumb-fallback span {
  color: rgba(255, 255, 255, 0.86);
  font-weight: 760;
}

.course-list-card-body {
  display: grid;
  gap: 9px;
  padding: 16px;
}

.course-list-card-body h3 {
  margin: 0;
  font-size: 21px;
}

.course-list-card-body strong {
  color: var(--accent);
  font-size: 13px;
}

.course-list-card-body p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.course-list-card-body small {
  color: var(--muted);
}

.course-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.course-card-tags span {
  border-radius: 8px;
  padding: 5px 8px;
  background: var(--soft);
  color: var(--green);
  font-size: 12px;
  font-weight: 850;
}

.course-cover {
  display: flex;
  align-items: flex-end;
  min-height: 150px;
  padding: 16px;
  color: white;
  background: var(--blue);
}

.course-cover.green {
  background: var(--green);
}

.course-cover.amber {
  background: var(--amber);
}

.course-card-body {
  padding: 18px;
}

.course-card h2 {
  margin: 0;
  font-size: 22px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
}

.tag-row span {
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.learning-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  max-width: 1080px;
  margin: 0 auto;
}

.bank-shell {
  display: grid;
  gap: 20px;
}

.bank-titlebar {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
}

.bank-titlebar p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.quiz-set-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.quiz-set-card,
.answer-card-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.06);
}

.quiz-set-card {
  display: grid;
  gap: 12px;
  padding: 20px;
}

.quiz-set-card h2 {
  margin: 0;
  font-size: 24px;
}

.quiz-set-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.quiz-set-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.quiz-set-meta span {
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--muted);
  font-size: 13px;
  font-weight: 760;
}

.quiz-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 18px;
  align-items: start;
}

.quiz-main {
  min-height: 420px;
}

.quiz-progress,
.quiz-actions,
.answer-card-head,
.answer-legend {
  display: flex;
  align-items: center;
  gap: 10px;
}

.quiz-progress {
  justify-content: space-between;
  margin-bottom: 12px;
  color: var(--muted);
}

.quiz-progress strong {
  color: var(--green);
}

.quiz-actions {
  justify-content: space-between;
  margin-top: 16px;
}

.quiz-actions button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.option-row.is-selected {
  border-color: rgba(18, 128, 92, 0.42);
  background: #f0faf5;
}

.answer-card-panel {
  position: sticky;
  top: 92px;
  padding: 18px;
}

.answer-card-head {
  justify-content: space-between;
  align-items: start;
  margin-bottom: 14px;
}

.answer-card-head h2 {
  margin: 4px 0 0;
  font-size: 22px;
}

.answer-card {
  display: block;
}

.answer-card-group + .answer-card-group {
  margin-top: 16px;
}

.answer-card-group h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

.answer-card-group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(36px, 1fr));
  gap: 8px;
}

.answer-card button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--ink);
  font-weight: 840;
}

.answer-card button.is-current {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.answer-card button.answered {
  background: #eef6ff;
  border-color: #9fc5ff;
}

.answer-card button.correct {
  background: #e8f7ef;
  border-color: #7cc9a5;
  color: #0f6b52;
}

.answer-card button.wrong {
  background: #fff0f3;
  border-color: #eba2b0;
  color: var(--rose);
}

.answer-legend {
  flex-wrap: wrap;
  margin-top: 16px;
  color: var(--muted);
  font-size: 13px;
}

.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 5px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: white;
}

.dot.answered {
  background: #9fc5ff;
}

.dot.correct {
  background: #7cc9a5;
}

.dot.wrong {
  background: #eba2b0;
}

.dot.marked {
  background: #f2cc54;
}

.quiz-exam-shell {
  max-width: 1220px;
  margin: 0 auto;
}

.quiz-chapter-view {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: white;
}

.quiz-chapter-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 18px;
}

.quiz-chapter-head h1 {
  margin: 0 0 6px;
  font-size: 21px;
}

.quiz-chapter-head span {
  color: #e22222;
}

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

.quiz-chapter-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 160px 96px;
  gap: 14px;
  align-items: center;
  min-height: 58px;
  border-radius: 8px;
  padding: 12px 20px;
  background: #f5f5f5;
}

.quiz-paper-title {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  min-height: 54px;
  border-bottom: 1px solid var(--line);
  background: white;
  text-align: center;
}

.quiz-paper-title h1 {
  margin: 0;
  font-size: 18px;
}

.quiz-paper-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 16px;
  padding: 16px;
  background: #f3f6fa;
}

.quiz-paper-main {
  background: white;
}

.quiz-paper-section-title {
  border-bottom: 1px solid var(--line);
  padding: 18px 28px;
  font-size: 20px;
}

.quiz-paper-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.quiz-paper-section-head .quiz-paper-section-title {
  flex: 1;
  border-bottom: 0;
}

.quiz-mark-icon {
  width: 40px;
  height: 40px;
  margin-right: 14px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: white;
  color: var(--muted);
  font-size: 24px;
}

.quiz-mark-icon.is-marked {
  color: var(--orange);
  border-color: var(--orange);
  background: var(--soft);
}

.quiz-answer-action {
  margin-top: 14px;
}

.quiz-answer-action button {
  width: 100%;
}

.mobile-answer-card-button,
.close-answer-card,
.quiz-mobile-progress {
  display: none;
}

.answer-card-head-actions {
  display: flex;
  gap: 8px;
}

.quiz-question-card {
  min-height: 560px;
  padding: 26px 42px;
  background: white;
}

.quiz-question-card h2 {
  margin: 0 0 18px;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.8;
}

.quiz-exam-shell .quiz-workspace {
  display: block;
}

.quiz-exam-shell .quiz-workspace[hidden],
.quiz-chapter-view[hidden] {
  display: none;
}

.quiz-exam-shell .answer-card-panel {
  position: sticky;
  top: 92px;
  align-self: start;
  padding: 16px;
  min-width: 0;
  overflow: hidden;
}

.quiz-exam-shell .answer-card {
  gap: 7px;
  max-height: 560px;
  overflow-y: auto;
  overflow-x: hidden;
}

.quiz-exam-shell .answer-card button {
  min-width: 0;
  min-height: 30px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 14px;
}

.quiz-exam-shell .answer-card button.marked {
  background: #fff9d8;
  border-color: #f2cc54;
}

.answer-card-section {
  margin: 14px 0 12px;
  line-height: 1.55;
}

.video-panel {
  overflow: hidden;
  border-radius: 8px;
  background: white;
}

.video-frame {
  display: grid;
  place-items: center;
  min-height: min(58vw, 520px);
  background: #101827;
  color: white;
}

.video-frame.has-video {
  position: relative;
  display: block;
  min-height: 0;
  background: black;
}

.video-account-watermark {
  position: absolute;
  top: 9%;
  right: 4%;
  z-index: 2;
  max-width: 70%;
  padding: 5px 8px;
  color: rgba(255, 255, 255, 0.58);
  background: rgba(0, 0, 0, 0.16);
  font-size: 12px;
  line-height: 1.35;
  pointer-events: none;
  user-select: none;
}

.video-account-watermark[data-position="1"] {
  top: 22%;
  right: auto;
  left: 4%;
}

.video-account-watermark[data-position="2"] {
  top: 62%;
  right: 4%;
}

.video-account-watermark[data-position="3"] {
  top: 74%;
  right: auto;
  left: 4%;
}

.video-frame video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: black;
}

.protected-video-controls {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 4;
  display: grid;
  grid-template-columns: 42px auto minmax(80px, 1fr) auto 66px 42px;
  align-items: center;
  gap: 8px;
  min-height: 54px;
  padding: 6px 10px;
  background: rgba(0, 0, 0, 0.76);
  color: white;
}

.protected-control-button,
.protected-video-rate {
  min-width: 42px;
  height: 42px;
  border: 0;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.12);
  color: white;
}

.protected-control-button {
  display: grid;
  place-items: center;
  padding: 0;
  font-size: 19px;
  cursor: pointer;
}

.protected-video-time {
  min-width: 42px;
  font-size: 12px;
  text-align: center;
}

.protected-video-seek {
  width: 100%;
  min-width: 0;
  accent-color: #f5b544;
}

.protected-video-rate {
  padding: 0 5px;
  font-size: 13px;
}

@media (max-width: 560px) {
  .protected-video-controls {
    grid-template-columns: 42px minmax(72px, 1fr) 58px 42px;
  }

  .protected-video-time {
    display: none;
  }
}

.video-error {
  margin: 10px 12px 0;
  color: #f8d4c8;
  font-weight: 700;
}

.play-symbol {
  display: grid;
  place-items: center;
  width: 78px;
  height: 78px;
  border: 2px solid rgba(255, 255, 255, 0.72);
  border-radius: 50%;
  font-size: 28px;
}

.lesson-meta,
.lesson-list-section,
.quiz-panel,
.form-card,
.admin-main,
.admin-sidebar {
  padding: 22px;
}

.lesson-list-section {
  border-top: 1px solid var(--line);
}

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

#view-learn .lesson-list {
  max-height: 420px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-color: #6f8f22 #f3e4d2;
  scrollbar-gutter: stable;
  scrollbar-width: auto;
}

#view-learn .lesson-list::-webkit-scrollbar {
  width: 12px;
}

#view-learn .lesson-list::-webkit-scrollbar-track {
  border-radius: 6px;
  background: #f3e4d2;
}

#view-learn .lesson-list::-webkit-scrollbar-thumb {
  border: 3px solid #f3e4d2;
  border-radius: 6px;
  background: #6f8f22;
}

#view-learn .lesson-list::-webkit-scrollbar-thumb:hover {
  background: #587519;
}

.lesson-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: white;
  color: var(--ink);
  text-align: left;
}

.lesson-item.is-active {
  border-color: rgba(18, 128, 92, 0.38);
  background: #f0faf5;
}

.lesson-item span,
.lesson-item small {
  color: var(--muted);
}

.lesson-item span {
  white-space: nowrap;
}

.lesson-item strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-empty {
  display: grid;
  gap: 8px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 16px;
  color: var(--muted);
  background: #fffaf4;
}

.lesson-empty strong {
  color: var(--ink);
}

.lesson-list-section .lesson-item {
  grid-template-columns: 160px minmax(0, 1fr) 90px;
}

.option-row {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 54px;
  margin: 12px 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.option-row input {
  width: 20px;
  height: 20px;
}

.quiz-short-answer {
  display: grid;
  gap: 10px;
  margin: 12px 0;
  font-weight: 760;
}

.quiz-short-answer textarea {
  width: 100%;
  min-height: 160px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  line-height: 1.7;
  resize: vertical;
}

.quiz-result,
.form-message {
  min-height: 26px;
  font-weight: 760;
}

.auth-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: 28px;
  align-items: center;
  min-height: calc(100vh - 180px);
}

.guide-layout {
  display: grid;
  gap: 28px;
  max-width: 1280px;
  margin: 0 auto;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.guide-card {
  display: grid;
  align-content: start;
  gap: 12px;
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  background: white;
  box-shadow: 0 10px 28px rgba(23, 33, 31, 0.06);
}

.guide-card span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: #f3eadf;
  color: var(--green);
  font-weight: 900;
}

.guide-card h2,
.guide-card p {
  margin: 0;
}

.guide-card h2 {
  font-size: 24px;
}

.guide-card p {
  color: var(--muted);
  line-height: 1.8;
}

.guide-card-accent {
  background: #fff7ec;
}

.form-card label {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--muted);
  font-weight: 720;
}

.form-card input,
.form-card select,
.form-card textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--ink);
  background: white;
}

.admin-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 18px;
}

.admin-sidebar {
  display: grid;
  align-content: start;
  gap: 10px;
}

.admin-tab {
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  background: var(--soft);
  color: var(--ink);
  text-align: left;
  font-weight: 760;
  padding: 0 12px;
}

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

.admin-panel {
  display: none;
}

.admin-panel.is-active {
  display: block;
}

.admin-form {
  display: grid;
  gap: 14px;
  margin: 16px 0 20px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f7fbf9;
}

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

.admin-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 720;
}

.admin-form input,
.admin-form select,
.admin-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--ink);
  background: white;
}

.admin-form input::placeholder,
.admin-form textarea::placeholder {
  color: rgba(101, 88, 76, 0.26);
  font-weight: 400;
  opacity: 1;
}

.helper-text {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.table-like {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.table-like > div {
  display: grid;
  grid-template-columns: 1.4fr 0.7fr 0.7fr;
  gap: 12px;
  padding: 14px;
  background: white;
}

@media (max-width: 980px) {
  .desktop-nav {
    display: none;
  }

  .icon-btn {
    display: inline-flex;
  }

  .header-actions {
    gap: 8px;
  }

  .header-actions .ghost-btn {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    border: 1px solid rgba(18, 128, 92, 0.22);
    background: white;
  }

  .news-lead,
  .program-layout,
  .quiz-bank-layout,
  .quiz-library-card,
  .member-portal,
  .member-learning-grid,
  .quiz-paper-layout,
  .learning-layout,
  .auth-shell,
  .admin-layout,
  .split-section,
  .quiz-workspace,
  .featured-slide {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .course-grid,
  .category-grid,
  .news-grid,
  .featured-course-grid,
  .subject-grid,
  .course-library-grid,
  .guide-grid,
  .quiz-set-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .quiz-library-items {
    grid-template-columns: 1fr;
  }

  .quiz-folder-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .quiz-folder-card .course-card-thumb {
    min-height: 150px;
    padding: 14px 12px 42px;
  }

  .quiz-folder-card .course-card-thumb-fallback strong {
    font-size: 17px;
  }

  .quiz-filter-bar {
    grid-template-columns: 1fr;
  }

  .quiz-chapter-row {
    grid-template-columns: 1fr 88px 72px;
    padding: 10px 12px;
  }

  .quiz-compact-row {
    grid-template-columns: minmax(0, 1fr) 96px auto;
    gap: 10px;
    padding: 12px;
  }

  .quiz-exam-shell .answer-card-panel {
    position: static;
  }

  .answer-card-panel {
    position: static;
  }

  .program-bank {
    position: static;
  }

  .admin-sidebar {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .editor-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  html,
  body {
    overflow-x: hidden;
  }

  main {
    width: 100%;
    box-shadow: none;
  }

  .site-footer {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 16px 14px 22px;
    box-shadow: none;
  }

  .site-footer div {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .site-footer nav {
    justify-content: flex-start;
    gap: 10px 14px;
  }

  .legal-page h1 {
    font-size: 38px;
  }

  .legal-card {
    padding: 16px;
    box-shadow: none;
  }

  .legal-card h2 {
    font-size: 19px;
  }

  .legal-card p {
    font-size: 15px;
    line-height: 1.75;
  }

  .site-header {
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 64px;
    padding: 10px 14px;
    gap: 10px;
  }

  .brand {
    min-width: 0;
  }

  .brand strong {
    display: block;
    overflow: hidden;
    max-width: 120px;
    font-size: 19px;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .header-actions {
    justify-self: end;
  }

  .mobile-nav {
    top: 64px;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }

  .mobile-nav a {
    min-height: 46px;
  }

  .brand small,
  .header-actions .primary-btn {
    display: none;
  }

  .view {
    padding: 16px 14px 28px;
  }

  .page-title {
    margin-bottom: 18px;
  }

  .page-title h1 {
    word-break: break-word;
  }

  .page-title p {
    font-size: 16px;
    line-height: 1.7;
  }

  .page-return-bar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 10px 14px 0;
  }

  .page-return-bar > button {
    width: 100%;
    min-height: 44px;
    padding: 0 10px;
    font-size: 16px;
  }

  .campus-carousel {
    width: 100vw;
    margin: -16px calc(50% - 50vw) 18px;
    min-height: 148px;
  }

  .campus-track,
  .campus-slide img {
    min-height: 148px;
  }

  .campus-slide strong {
    font-size: 24px;
  }

  .campus-slide span {
    display: none;
  }

  .campus-dots {
    bottom: 12px;
  }

  .news-lead {
    gap: 10px;
  }

  .news-list-panel {
    padding: 12px;
  }

  .news-list-panel h1 {
    font-size: 24px;
  }

  .news-feature p,
  .split-section {
    display: none;
  }

  .news-list,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .quiz-compact-head {
    display: grid;
  }

  .quiz-compact-row {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .quiz-compact-row .compact {
    width: 100%;
  }

  .news-list article,
  .compact-news-card {
    grid-template-columns: 96px minmax(0, 1fr);
    min-height: 98px;
  }

  #view-home .news-grid {
    gap: 10px;
  }

  #view-home .compact-news-card {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 10px;
    min-height: 82px;
    padding: 10px;
    align-items: center;
  }

  #view-home .compact-news-card img {
    width: 92px;
    height: 64px;
    aspect-ratio: auto;
  }

  #view-home .compact-news-card time {
    font-size: 12px;
    line-height: 1.2;
  }

  #view-home .compact-news-card h3 {
    margin: 2px 0 3px;
    font-size: 17px;
    line-height: 1.25;
    -webkit-line-clamp: 2;
  }

  #view-home .compact-news-card p {
    margin: 0 0 4px;
    font-size: 13px;
    line-height: 1.35;
    display: -webkit-box;
    overflow: hidden;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
  }

  #view-home .compact-news-card .text-btn {
    min-height: auto;
    padding: 0;
    font-size: 13px;
  }

  .news-feature img {
    aspect-ratio: 16 / 6.5;
  }

  .news-feature div {
    padding: 8px 10px;
  }

  .news-feature h2 {
    font-size: 18px;
  }

  .news-list-panel h1,
  .page-title h1,
  .auth-shell h1 {
    font-size: clamp(30px, 11vw, 38px);
    line-height: 1.12;
  }

  .hero-actions,
  .detail-actions,
  .metric-row,
  .admin-sidebar {
    grid-template-columns: 1fr;
  }

  .hero-actions,
  .detail-actions {
    display: grid;
  }

  .feature-grid,
  .course-grid,
  .category-grid,
  .news-grid,
  .featured-course-grid,
  .subject-grid,
  .course-library-grid,
  .guide-grid,
  .quiz-set-grid {
    grid-template-columns: 1fr;
  }

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

  .course-filter-row {
    grid-template-columns: 1fr;
  }

  .course-filter-panel {
    padding: 12px;
  }

  .course-sort-bar {
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .course-sort-bar > button {
    min-width: 72px;
  }

  .course-filter-row strong {
    padding-top: 0;
  }

  .news-index-item {
    grid-template-columns: 1fr;
  }

  .course-market-card,
  .course-list-card,
  .course-library-card,
  .quiz-market-card {
    min-width: 0;
  }

  .course-market-card .course-card-thumb,
  .course-card-thumb {
    min-height: 150px;
  }

  .course-card-thumb-fallback strong {
    font-size: clamp(24px, 9vw, 34px);
  }

  .news-index-content {
    padding-top: 0;
  }

  .news-index-head {
    display: grid;
    gap: 6px;
  }

  .quiz-paper-title {
    position: sticky;
    top: 0;
    z-index: 35;
    grid-template-columns: 42px minmax(0, 1fr) 42px;
    padding: 8px 10px;
    text-align: center;
  }

  .quiz-paper-title h1 {
    font-size: 17px;
    line-height: 1.35;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .quiz-paper-title #backToSets {
    width: 40px;
    min-height: 40px;
    padding: 0;
    border: 0;
    background: transparent;
    font-size: 24px;
  }

  .back-to-sets-text {
    display: none;
  }

  .quiz-mobile-progress {
    display: grid;
    gap: 7px;
    padding: 10px 14px;
    background: white;
    color: var(--muted);
    font-size: 14px;
  }

  .quiz-mobile-progress > div {
    display: flex;
    justify-content: space-between;
  }

  .quiz-mobile-progress i {
    height: 5px;
    overflow: hidden;
    border-radius: 999px;
    background: #e8ece9;
  }

  .quiz-mobile-progress b {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: var(--green);
    transition: width 0.2s ease;
  }

  .quiz-paper-layout {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 8px;
  }

  .quiz-question-card {
    padding: 16px 12px 92px;
    min-height: auto;
  }

  .quiz-paper-main {
    border-radius: 10px;
    overflow: hidden;
    touch-action: pan-y;
    will-change: transform, opacity;
  }

  .quiz-paper-main.quiz-slide-out-left {
    animation: quizSlideOutLeft 180ms ease-in forwards;
  }

  .quiz-paper-main.quiz-slide-out-right {
    animation: quizSlideOutRight 180ms ease-in forwards;
  }

  .quiz-paper-main.quiz-slide-in-right {
    animation: quizSlideInRight 220ms ease-out both;
  }

  .quiz-paper-main.quiz-slide-in-left {
    animation: quizSlideInLeft 220ms ease-out both;
  }

  .quiz-question-card h2 {
    margin-bottom: 12px;
    font-size: 19px;
    line-height: 1.5;
  }

  .quiz-paper-section-title {
    padding: 10px 12px;
    font-size: 15px;
    line-height: 1.55;
  }

  .quiz-mark-icon {
    flex: 0 0 38px;
    width: 38px;
    height: 38px;
    margin-right: 8px;
    font-size: 22px;
  }

  .option-row {
    gap: 10px;
    min-height: 48px;
    margin: 8px 0;
    padding: 10px;
    border-radius: 8px;
  }

  .option-row input {
    flex: 0 0 auto;
    width: 18px;
    height: 18px;
  }

  .quiz-exam-shell .answer-card {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    max-height: 300px;
  }

  .quiz-exam-shell .answer-card button {
    min-height: 40px;
  }

  .bank-titlebar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .quiz-actions {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 45;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin: 0;
    padding: 10px 12px max(10px, env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 -8px 24px rgba(23, 33, 31, 0.08);
  }

  .quiz-actions button {
    min-height: 42px;
    padding: 9px 8px;
    font-size: 15px;
  }

  #prevQuestion,
  #nextQuestion {
    order: initial;
  }

  .mobile-answer-card-button {
    display: block;
  }

  #nextQuestion {
    border-color: var(--green);
    background: var(--green);
    color: white;
  }

  .quiz-answer-action {
    margin-top: 12px;
  }

  .quiz-result {
    min-height: 0;
    margin: 10px 0 0;
    line-height: 1.55;
  }

  .quiz-page-toast {
    position: fixed;
    left: 50%;
    bottom: 22px;
    z-index: 60;
    transform: translate(-50%, 10px);
    border-radius: 999px;
    padding: 9px 16px;
    background: rgba(20, 28, 28, 0.88);
    color: white;
    font-size: 14px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 160ms ease, transform 160ms ease;
  }

  body.quiz-active-mobile .site-header,
  body.quiz-active-mobile .mobile-nav,
  body.quiz-active-mobile .page-return-bar,
  body.quiz-active-mobile .site-footer {
    display: none !important;
  }

  body.quiz-active-mobile main {
    padding-top: 0;
  }

  body.quiz-active-mobile #view-bank {
    padding-top: 0;
  }

  body.quiz-active-mobile .quiz-exam-shell .answer-card-panel {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 55;
    display: none;
    max-height: 72vh;
    overflow-y: auto;
    border-radius: 18px 18px 0 0;
    box-shadow: 0 -14px 40px rgba(23, 33, 31, 0.2);
  }

  body.quiz-active-mobile .quiz-exam-shell .answer-card-panel.is-mobile-open {
    display: block;
  }

  body.quiz-active-mobile .close-answer-card {
    display: inline-flex;
  }

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

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

  .quiz-chapter-head {
    display: grid;
    gap: 10px;
  }

  .quiz-chapter-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 12px;
  }

  .quiz-chapter-row .compact,
  .quiz-chapter-row button {
    width: 100%;
  }

  .video-frame {
    min-height: 260px;
  }

  .program-layout {
    gap: 12px;
  }

  .quiz-module-card {
    min-height: 64px;
    padding: 12px;
  }

  .quiz-module-card strong {
    font-size: 16px;
  }

  .member-course-panel {
    padding: 16px;
  }

  .member-course-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    padding: 12px 0;
  }

  .member-course-row img {
    width: 100%;
  }

  #view-member .member-panel-head {
    margin-bottom: 4px;
  }

  #view-member .member-menu {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    padding: 12px;
  }

  #view-member .member-profile {
    grid-column: 1 / -1;
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 8px;
    padding-bottom: 4px;
  }

  #view-member .member-avatar {
    width: 40px;
    height: 40px;
  }

  #view-member .member-profile small {
    display: none;
  }

  #view-member .member-menu button {
    min-height: 38px;
    padding: 8px 10px;
    text-align: center;
    font-size: 15px;
  }

  #view-member .member-menu button.member-logout {
    grid-column: 1 / -1;
    margin-top: 0;
  }

  #view-member .member-learning-main > h2,
  #view-member .member-course-row p {
    display: none;
  }

  .page-title-simple h1 {
    font-size: 28px;
  }

  .article-content {
    font-size: 16px;
    line-height: 1.75;
  }

  #view-member .member-course-row h2 {
    font-size: 18px;
    line-height: 1.35;
  }

  #view-member .member-course-row .primary-btn {
    min-height: 38px;
    padding: 8px 12px;
    white-space: nowrap;
  }

  .member-settings-form {
    grid-template-columns: 1fr;
  }

  .lesson-item {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .lesson-list-section .lesson-item {
    grid-template-columns: auto minmax(0, 1fr);
  }

  #view-learn .lesson-list {
    max-height: min(420px, 52vh);
  }

  .program-bank,
  .video-panel,
  .quiz-panel,
  .form-card,
  .article-detail,
  .quiz-chapter-view {
    border-radius: 8px;
  }

  .lesson-meta,
  .lesson-list-section,
  .quiz-panel,
  .form-card,
  .admin-main,
  .admin-sidebar,
  .program-bank {
    padding: 16px;
  }

  .table-like > div {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 801px) and (max-width: 1180px) {
  #view-home .news-list,
  #view-home .news-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    justify-content: stretch;
  }

  #view-home .news-list article,
  #view-home .compact-news-card {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 10px;
    min-width: 0;
    padding: 10px;
  }
}

@media (max-width: 800px) {
  #view-home .news-list,
  #view-home .news-grid {
    grid-template-columns: 1fr;
    justify-content: stretch;
  }
}

@media (max-width: 420px) {
  .view {
    padding-inline: 10px;
  }

  .site-header {
    padding-inline: 10px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .brand-logo {
    width: 36px;
    height: 36px;
  }

  .member-login-btn {
    max-width: 92px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .page-return-bar {
    grid-template-columns: 1fr 1fr;
  }

  .quiz-exam-shell .answer-card {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@keyframes quizSlideOutLeft {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(-28%);
  }
}

@keyframes quizSlideOutRight {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(28%);
  }
}

@keyframes quizSlideInRight {
  from {
    opacity: 0;
    transform: translateX(28%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes quizSlideInLeft {
  from {
    opacity: 0;
    transform: translateX(-28%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}