* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

html, body {
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f9ff;
  padding-top: 70px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.bg-blue-animate-scroll {
  width: 100vw;
  height: 100vh;
  background: linear-gradient(90deg, #E3F2FD, #BBDEFB, #B3E5FC, #BBDEFB, #E3F2FD);
  background-size: 300% 100%;
  animation: blueScrollAnimate 15s ease-in-out infinite;
}

@keyframes blueScrollAnimate {
  0% {
    background-position: 0% 0%;
  }
  50% {
    background-position: 100% 0%;
  }
  100% {
    background-position: 0% 0%;
  }
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0.625rem 0.9375rem;
  z-index: 9999;
  border-bottom: 1px solid #eeeeee;
  flex-wrap: wrap;
}

.logo {
  font-weight: bold;
  display: inline-flex;
  text-align: center;
  align-items: center;
  padding: 0.625rem 1.5rem;
  color: #333333;
  text-decoration: none;
  margin: 0 0.375rem;
  font-size: 1.2rem;
  white-space: nowrap;
}

.logo img {
  width: 3.125rem;
  height: auto;
  max-height: 3.125rem;
  object-fit: contain;
}

.nav-links {
  display: flex;
  margin-left: 1.875rem;
  gap: 1.25rem;
}

.nav-right {
  display: flex;
  margin-left: auto;
  gap: 1.25rem;
}

.navbar .nav-links a,
.navbar .nav-right a {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  color: #333333;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.3s ease;
  font-size: 1.2rem;
  font-weight: 500;
}

.navbar .nav-links a:hover,
.navbar .nav-right a:hover {
  color: #666666;
}

.nav-right a:last-child {
  margin-right: 1.875rem;
}

.content {
  flex: 1;
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.content h1 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: 1rem;
}

.footer-section {
  background-color: #333;
  color: #ccc;
  width: 100%;
  padding: 1.875rem 1.25rem;
  margin-top: auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 0.9375rem;
  flex-wrap: wrap;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.footer-links a {
  color: #ccc;
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.25rem 0.5rem;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-info {
  text-align: center;
  font-size: 0.75rem;
  line-height: 1.8;
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.25rem;
}

.footer-info a {
  color: #ccc;
  text-decoration: none;
}

.footer-info a:hover {
  color: #fff;
  text-decoration: underline;
}

body.accessibility-mode {
  font-size: 18px !important;
  line-height: 2 !important;
  color: #000000 !important;
  background-color: #ffffff !important;
  --text-color: #000000;
  --bg-color: #ffffff;
  --primary-color: #0047AB;
  --secondary-color: #0056B3;
  --focus-color: #FF6B00;
  --link-color: #003366;
  font-weight: 500 !important;
}

.accessibility-mode .navbar,
.accessibility-mode .content,
.accessibility-mode .main-article,
.accessibility-mode .notice-board,
.accessibility-mode .notice-detail,
.accessibility-mode .footer-section {
  background-color: var(--bg-color) !important;
  color: var(--text-color) !important;
}

.accessibility-mode h1,
.accessibility-mode h2,
.accessibility-mode h3,
.accessibility-mode h4,
.accessibility-mode p,
.accessibility-mode .logo,
.accessibility-mode .nav-links a,
.accessibility-mode .nav-right a,
.accessibility-mode .article-subtitle,
.accessibility-mode .article-section-title,
.accessibility-mode .article-paragraph,
.accessibility-mode .notice-title,
.accessibility-mode .notice-link,
.accessibility-mode .notice-text,
.accessibility-mode .notice-detail-title,
.accessibility-mode .notice-detail-content,
.accessibility-mode .footer-links a,
.accessibility-mode .footer-info {
  color: var(--text-color) !important;
}

.accessibility-mode .hero-section {
  background: var(--bg-color) !important;
  color: var(--text-color) !important;
  min-height: auto !important;
  padding: 2rem !important;
  position: relative !important;
}

.accessibility-mode .hero-section::before {
  display: none !important;
}

.accessibility-mode .hero-content {
  color: var(--text-color) !important;
  background-color: var(--bg-color) !important;
  padding: 2rem !important;
  border: 3px solid var(--text-color) !important;
  border-radius: 8px !important;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2) !important;
}

.accessibility-mode .hero-title,
.accessibility-mode .hero-text {
  color: var(--text-color) !important;
  text-shadow: none !important;
  font-weight: bold !important;
  line-height: 1.8 !important;
}

.accessibility-mode a:focus,
.accessibility-mode button:focus,
.accessibility-mode input:focus,
.accessibility-mode select:focus,
.accessibility-mode textarea:focus {
  outline: 4px solid var(--focus-color) !important;
  outline-offset: 2px !important;
  box-shadow: 0 0 0 6px rgba(255, 107, 0, 0.3) !important;
  border-radius: 2px !important;
}

.accessibility-mode .btn:focus,
.accessibility-mode .notice-back-button:focus,
.accessibility-mode .notice-more-link:focus {
  outline: 4px solid var(--focus-color) !important;
  outline-offset: 4px !important;
}

.accessibility-mode * {
  animation-duration: 0.001s !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.001s !important;
}

.accessibility-mode .navbar .nav-links a:hover,
.accessibility-mode .navbar .nav-right a:hover,
.accessibility-mode .notice-item:hover,
.accessibility-mode .notice-back-button:hover,
.accessibility-mode .notice-more-link:hover,
.accessibility-mode .footer-links a:hover {
  transform: none !important;
  box-shadow: none !important;
}

.accessibility-mode a:not(.btn):not(.logo):not(.notice-back-button) {
  text-decoration: underline !important;
  text-decoration-thickness: 2px !important;
  text-underline-offset: 4px !important;
}

.accessibility-mode a:not(.btn):not(.logo):not(.notice-back-button):hover,
.accessibility-mode a:not(.btn):not(.logo):not(.notice-back-button):focus {
  text-decoration-thickness: 4px !important;
  background-color: rgba(0, 71, 171, 0.1) !important;
}

.accessibility-mode .navbar {
  border-bottom: 3px solid var(--text-color) !important;
  padding: 1rem 0.9375rem !important;
}

.accessibility-mode .nav-links a,
.accessibility-mode .nav-right a {
  font-size: 1.3rem !important;
  padding: 0.75rem 1rem !important;
  border: 2px solid transparent !important;
  border-radius: 4px !important;
  margin: 0.125rem !important;
  min-height: 50px !important;
  min-width: 50px !important;
}

.accessibility-mode .logo {
  font-size: 1.4rem !important;
  border: 2px solid transparent !important;
}

.accessibility-mode .nav-links a:focus,
.accessibility-mode .nav-right a:focus,
.accessibility-mode .logo:focus {
  border: 2px solid var(--focus-color) !important;
  outline: 2px solid var(--focus-color) !important;
}

.accessibility-mode input,
.accessibility-mode select,
.accessibility-mode textarea,
.accessibility-mode button {
  border: 3px solid var(--text-color) !important;
  background-color: var(--bg-color) !important;
  color: var(--text-color) !important;
  font-size: 1.25rem !important;
  padding: 0.75rem !important;
  min-height: 44px !important;
  min-width: 44px !important;
}

.accessibility-mode .navbar {
  background-color: var(--bg-color) !important;
  border-bottom: 3px solid var(--text-color) !important;
}

.accessibility-mode .nav-links a,
.accessibility-mode .nav-right a {
  position: relative !important;
}

.accessibility-mode .responsive-img {
  border: 3px solid var(--text-color) !important;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2) !important;
}

.accessibility-mode .article-image figcaption {
  font-size: 1.1rem !important;
  color: var(--text-color) !important;
  font-weight: 500 !important;
  border: 2px solid var(--text-color) !important;
  padding: 0.5rem !important;
  background-color: rgba(0, 0, 0, 0.05) !important;
}

.accessibility-mode .navbar a,
.accessibility-mode .notice-link,
.accessibility-mode .notice-back-button,
.accessibility-mode .notice-more-link,
.accessibility-mode .footer-links a {
  min-height: 44px !important;
  min-width: 44px !important;
}

.accessibility-mode .nav-links a,
.accessibility-mode .nav-right a {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
}

.accessibility-mode .main-article,
.accessibility-mode .notice-detail-container {
  max-width: 70ch !important;
  margin-left: auto !important;
  margin-right: auto !important;
}

.accessibility-mode p,
.accessibility-mode li {
  margin-bottom: 1.5rem !important;
}

.accessibility-mode .notice-item {
  margin-bottom: 1.2rem !important;
  padding-left: 1.5rem !important;
  position: relative !important;
  border-bottom: 2px solid var(--text-color) !important;
}

.accessibility-mode .notice-board,
.accessibility-mode .notice-detail {
  border: 3px solid var(--text-color) !important;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2) !important;
}

.accessibility-mode .notice-board::before {
  background: var(--primary-color) !important;
  width: 8px !important;
}

.accessibility-mode .notice-board {
  background-color: var(--bg-color) !important;
}

.accessibility-mode .notice-title {
  color: var(--text-color) !important;
  font-weight: bold !important;
}

.accessibility-mode .notice-link {
  color: var(--text-color) !important;
  font-weight: 500 !important;
  font-size: 1.1rem !important;
}

.accessibility-mode .notice-link:hover {
  color: var(--text-color) !important;
  background-color: rgba(0, 0, 0, 0.05) !important;
  text-decoration: underline !important;
}

.accessibility-mode .notice-date {
  color: #333 !important;
  font-weight: 500 !important;
}

.accessibility-mode .new-badge,
.accessibility-mode .new-count-badge {
  background-color: #000 !important;
  color: #fff !important;
  font-weight: bold !important;
}

.accessibility-mode .pinned-notice {
  background-color: rgba(255, 193, 7, 0.2) !important;
  border-left: 4px solid #ffc107 !important;
}

.accessibility-mode .footer-section {
  background-color: var(--text-color) !important;
  color: var(--bg-color) !important;
  border-top: 5px solid var(--primary-color) !important;
}

.accessibility-mode .footer-links a,
.accessibility-mode .footer-info,
.accessibility-mode .footer-info a,
.accessibility-mode .footer-links p,
.accessibility-mode .footer-info p {
  color: var(--bg-color) !important;
}

.accessibility-mode .footer-links a:hover,
.accessibility-mode .footer-links a:focus,
.accessibility-mode .footer-links p:hover,
.accessibility-mode .footer-links p:focus {
  background-color: rgba(255, 255, 255, 0.2) !important;
  outline: 2px solid var(--bg-color) !important;
}

.accessibility-mode .skip-nav {
  position: absolute !important;
  top: -50px !important;
  left: 10px !important;
  background-color: var(--primary-color) !important;
  color: white !important;
  padding: 12px !important;
  text-decoration: none !important;
  z-index: 10001 !important;
  border: 3px solid white !important;
}

.accessibility-mode .skip-nav:focus {
  top: 10px !important;
  outline: 4px solid var(--focus-color) !important;
}

.accessibility-mode [tabindex]:focus {
  outline: 4px solid var(--focus-color) !important;
  outline-offset: 4px !important;
  box-shadow: 0 0 0 8px rgba(255, 107, 0, 0.3) !important;
}

.accessibility-mode ::-webkit-scrollbar {
  width: 16px !important;
}

.accessibility-mode ::-webkit-scrollbar-track {
  background-color: var(--bg-color) !important;
  border: 2px solid var(--text-color) !important;
}

.accessibility-mode ::-webkit-scrollbar-thumb {
  background-color: var(--primary-color) !important;
  border: 3px solid var(--bg-color) !important;
  border-radius: 8px !important;
}

.accessibility-mode ::-webkit-scrollbar-thumb:hover {
  background-color: var(--secondary-color) !important;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  padding: 40px 0 30px;
  background: linear-gradient(135deg, #1a6bc3 0%, #0c2461 100%);
  color: white;
  border-radius: 12px;
  margin-bottom: 40px;
  box-shadow: 0 10px 30px rgba(0, 0, 150, 0.15);
}

header h2 {
  font-size: clamp(1.8rem, 6vw, 3.5rem);
  margin-bottom: 10px;
  letter-spacing: 1px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
  max-width: 800px;
  margin: 0 auto;
}

.section-title {
  font-size: 2.6rem;
  color: #0c2461;
  margin: 50px 0 30px;
  padding-bottom: 15px;
  border-bottom: 3px solid #1a6bc3;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 100px;
  height: 3px;
  background-color: #4CAF50;
}

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto 60px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 4px;
  background-color: #1a6bc3;
  transform: translateX(-50%);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 50px;
  width: 100%;
  display: flex;
  justify-content: center;
}

.timeline-item:nth-child(odd) .timeline-content {
  margin-left: auto;
  margin-right: 0;
  padding-left: 60px;
  padding-right: 0;
}

.timeline-item:nth-child(even) .timeline-content {
  margin-right: auto;
  margin-left: 0;
  padding-right: 60px;
  padding-left: 0;
  text-align: right;
}

.timeline-item:nth-child(odd) .timeline-content::before {
  left: -15px;
  right: auto;
}

.timeline-item:nth-child(even) .timeline-content::before {
  right: -15px;
  left: auto;
}

.timeline-date {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  background-color: #1a6bc3;
  color: white;
  padding: 8px 20px;
  border-radius: 30px;
  font-weight: bold;
  box-shadow: 0 5px 15px rgba(26, 107, 195, 0.4);
  z-index: 2;
  white-space: nowrap;
}

.timeline-content {
  background-color: white;
  width: calc(50% - 40px);
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

.timeline-content::before {
  content: '';
  position: absolute;
  top: 25px;
  width: 20px;
  height: 20px;
  background-color: white;
  transform: rotate(45deg);
  box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.08);
}

.timeline-content::after {
  content: '';
  position: absolute;
  top: 30px;
  width: 20px;
  height: 20px;
  background-color: #4CAF50;
  border-radius: 50%;
  z-index: 1;
}

.timeline-item:nth-child(odd) .timeline-content::after {
  left: -40px;
}

.timeline-item:nth-child(even) .timeline-content::after {
  right: -40px;
}

.timeline-title {
  font-size: 1.9rem;
  color: #0c2461;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
}

.timeline-title i {
  margin-right: 10px;
  color: #1a6bc3;
}

.timeline-desc {
  color: #555;
  font-size: 1.4rem;
  text-align: left;
}

.timeline-desc ul {
  padding-left: 20px;
}

.timeline-desc li {
  margin-bottom: 8px;
}

.challenges-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

.challenge-card {
  background-color: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.challenge-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

.challenge-header {
  background: linear-gradient(to right, #00aaff, #00aaff);
  color: white;
  padding: 20px;
  display: flex;
  align-items: center;
}

.challenge-header i {
  font-size: 2rem;
  margin-right: 15px;
}

.challenge-header h3 {
  font-size: 2rem;
}

.challenge-content {
  padding: 25px;
}

.challenge-problem, .challenge-solution {
  margin-bottom: 20px;
}

.challenge-label {
  font-weight: bold;
  color: #0c2461;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  font-size: 145%;
}

.challenge-label i {
  margin-right: 8px;
}

.challenge-text {
  color: #555;
  padding-left: 25px;
  font-size: 133%;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate {
  animation: fadeInUp 0.8s ease forwards;
}

footer {
  text-align: center;
  padding: 30px 0;
  margin-top: 40px;
  color: #666;
  border-top: 1px solid #ddd;
}

.highlight {
  color: #1a6bc3;
  font-weight: bold;
}

.tag {
  display: inline-block;
  background-color: #e8f4ff;
  color: #1a6bc3;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.9rem;
  margin-right: 8px;
  margin-top: 10px;
}

@media screen and (max-width: 480px) {
  html {
    font-size: 14px;
  }
  body {
    padding-top: 55px;
  }
  .navbar {
    flex-wrap: wrap;
    padding: 0.375rem 0.5rem;
  }
  .logo {
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    margin: 0 auto;
    width: 100%;
    justify-content: center;
  }
  .logo img {
    width: 2.25rem;
    max-height: 2.25rem;
  }
  .nav-links,
  .nav-right {
    margin-left: 0;
    justify-content: center;
    width: 100%;
    margin-top: 0.5rem;
    gap: 0.5rem;
  }
  .navbar .nav-links a,
  .navbar .nav-right a {
    padding: 0.5rem;
    font-size: 1.0rem;
  }
  .nav-right a:last-child {
    margin-right: 0;
  }
  .content {
    padding: 1rem 0.75rem;
  }
  .footer-section {
    padding: 1.5rem 0.75rem;
  }
  .footer-links {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
  }
  .footer-links a {
    font-size: 0.8rem;
    text-align: center;
    width: 100%;
  }
  .footer-info {
    font-size: 0.7rem;
  }
  .hide-on-mobile {
    display: none !important;
  }
  .accessibility-mode .content,
  .accessibility-mode .main-article,
  .accessibility-mode .notice-detail-container {
    padding-left: 1rem !important;
    padding-right: 1rem !important;
  }
  .accessibility-mode .nav-links a,
  .accessibility-mode .nav-right a {
    width: 100% !important;
    margin-bottom: 0.5rem !important;
    justify-content: center !important;
  }
  .accessibility-mode .hero-title {
    font-size: 1.5rem !important;
  }
  .accessibility-mode .hero-text {
    font-size: 1.1rem !important;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .challenges-container {
    grid-template-columns: 1fr;
  }
  .timeline-content {
    width: calc(100% - 70px);
    margin-left: 70px !important;
  }
}

@media screen and (max-width: 768px) {
  body {
    padding-top: 60px;
  }
  .navbar {
    padding: 0.5rem 0.75rem;
    flex-wrap: nowrap;
  }
  .logo {
    padding: 0.5rem 1rem;
    font-size: 1.1rem;
  }
  .logo img {
    width: 2.5rem;
    max-height: 2.5rem;
  }
  .nav-links {
    margin-left: 1rem;
    gap: 0.75rem;
  }
  .nav-right {
    gap: 0.75rem;
  }
  .navbar .nav-links a,
  .navbar .nav-right a {
    padding: 0.375rem 0.625rem;
    font-size: 1.2rem;
  }
  .nav-right a:last-child {
    margin-right: 1rem;
  }
  .content {
    padding: 1.5rem;
  }
  .footer-links {
    gap: 1rem;
  }
  .footer-links a {
    font-size: 0.85rem;
  }
  .accessibility-mode {
    font-size: 1.1rem !important;
  }
  .accessibility-mode .navbar {
    flex-wrap: wrap !important;
  }
  .accessibility-mode .nav-links,
  .accessibility-mode .nav-right {
    width: 100% !important;
    justify-content: center !important;
    margin-top: 1rem !important;
  }
  .accessibility-mode .nav-links a,
  .accessibility-mode .nav-right a {
    min-width: 44px !important;
    padding: 0.75rem !important;
  }
  .accessibility-mode .hero-section {
    padding: 1rem !important;
  }
  .accessibility-mode .hero-content {
    padding: 1.5rem !important;
  }
}

@media screen and (max-width: 992px) {
  .timeline::before {
    left: 30px;
  }
  .timeline-date {
    left: 30px;
    transform: none;
  }
  .timeline-content {
    width: calc(100% - 80px);
    margin-left: 80px !important;
    margin-right: 0 !important;
    padding-left: 30px !important;
    padding-right: 30px !important;
    text-align: left !important;
  }
  .timeline-item:nth-child(odd) .timeline-content::before,
  .timeline-item:nth-child(even) .timeline-content::before {
    left: -15px;
    right: auto;
  }
  .timeline-item:nth-child(odd) .timeline-content::after,
  .timeline-item:nth-child(even) .timeline-content::after {
    left: -40px;
    right: auto;
  }
}

@media screen and (min-width: 481px) {
  .hide-on-desktop {
    display: none !important;
  }
}

@media screen and (min-width: 1200px) {
  .content {
    padding: 2.5rem 3rem;
  }
  .footer-section {
    padding: 2.5rem 3rem;
  }
}

@media screen and (min-width: 1600px) {
  .content,
  .footer-links,
  .footer-info {
    max-width: 1400px;
  }
}

@media print {
  .accessibility-mode * {
    color: #000000 !important;
    background-color: #ffffff !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  .accessibility-mode a {
    text-decoration: underline !important;
  }
  .accessibility-mode .navbar,
  .accessibility-mode .hero-section::before {
    display: none !important;
  }
  .accessibility-mode .content {
    max-width: 100% !important;
  }
}
html {
  overflow-x: hidden;
  overflow-y: auto;
}
body {
  overflow-x: hidden;
  overflow-y: auto;
}
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}
::-webkit-scrollbar-track {
  background: #f5f5f5;
  border-radius: 6px;
}
::-webkit-scrollbar-thumb {
  background: #dcdcdc;
  border-radius: 6px;
  border: 2px solid #f5f5f5;
}
::-webkit-scrollbar-thumb:hover {
  background: #c5c5c5; 
}
.navbar {
  width: calc(100%) !important; 
  right: 0 !important; 
  left: auto !important; 
}
@media screen and (max-width: 768px) {
  body {
    padding-right: 0 !important; 
  }
  .navbar {
    width: 100% !important; 
  }
  ::-webkit-scrollbar {
    display: none;
  }
  html, body {
    -ms-overflow-style: none; 
    scrollbar-width: none; 
  }
}
html {
  scrollbar-width: thin; 
  scrollbar-color: #dcdcdc #f5f5f5; 
}
@media screen and (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  body {
    padding-top: 55px;
  }
  
  .navbar {
    flex-wrap: wrap;
    padding: 0.375rem 0.5rem;
  }
  
  .logo {
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    margin: 0 auto;
    width: 100%;
    justify-content: center;
  }
  
  .logo img {
    width: 2.25rem;
    max-height: 2.25rem;
  }
  
  .nav-links,
  .nav-right {
    margin-left: 0;
    justify-content: center;
    width: 100%;
    margin-top: 0.5rem;
    gap: 0.5rem;
  }
  
  .navbar .nav-links a,
  .navbar .nav-right a {
    padding: 0.5rem;
    font-size: 1.0rem;
  }
  
  .nav-right a:last-child {
    margin-right: 0;
  }
  
  .content {
    padding: 1rem 0.75rem;
  }
  
  .privacy-content {
    padding-top: 1.5rem;
    padding-bottom: 2rem;
  }
  
  .privacy-container {
    padding: 1rem;
    margin: 0 0.75rem;
    border-radius: 6px;
  }
  
  .privacy-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
  }
  
  .privacy-title {
    font-size: clamp(1.4rem, 4vw, 1.8rem);
    margin-bottom: 0.75rem;
  }
  
  .privacy-meta {
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
  }
  
  .update-date,
  .effective-date {
    width: 100%;
    text-align: center;
    padding: 0.4rem 0.8rem;
  }
  
  .privacy-section {
    margin-bottom: 2rem;
  }
  
  .privacy-section h2 {
    font-size: clamp(1.3rem, 4vw, 1.5rem);
    margin-bottom: 1rem;
  }
  
  .privacy-section h3 {
    font-size: clamp(1.1rem, 3.5vw, 1.3rem);
    margin: 1.2rem 0 0.7rem;
  }
  
  .privacy-section p {
    margin-bottom: 1rem;
    text-align: left;
  }
  
  .privacy-list {
    padding-left: 1rem;
  }
  
  .privacy-list li {
    padding-left: 1rem;
    margin-bottom: 0.6rem;
  }
  
  .subsection {
    padding: 1rem;
  }
  
  .signature {
    text-align: center;
    margin-top: 2rem;
  }
  
  .footer-section {
    padding: 1.5rem 0.75rem;
  }
  
  .footer-links {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
  }
  
  .footer-links a {
    font-size: 0.8rem;
    text-align: center;
    width: 100%;
  }
  
  .footer-info {
    font-size: 0.7rem;
  }
  .content h2 {
    font-size: clamp(2.2rem, 6vw, 5rem) !important; 
  }
  
  h1 {
    font-size: clamp(1.5rem, 6vw, 2rem) !important; 
  }
  
 .content h1 {
    font-size: clamp(1.5rem, 6vw, 2rem) !important; 
  }
}
#auth-initial-style{
  a[href="test.html"] {
    opacity: 0.3;
    pointer-events: none;
    cursor: not-allowed;
    transition: all 0.3s ease; 
  }
  a[href="test.html"].link-enabled,
  a[href="test.html"][style*="opacity: 1"] {
    opacity: 1 !important;
    pointer-events: auto !important;
    cursor: pointer !important;
  }
  #loginLink::after {
    content: " (未登录)";
    font-size: 0.8em;
    color: #666;
  }
  #loginLink.user-logged-in::after {
    content: " ✓";
    color: #4CAF50;
    font-size: 1em;
  }
  }
  #beian img{
  	 width: 15px !important;
  	 height: auto !important;
  	 transform: translateY(0.1875rem) !important; 
  }
  #beian p{
  	 width: 15px !important;
  	 height: auto !important;
  	 transform: translateY(0.1875rem) !important; 
  }

  @media screen and (max-width: 768px) {
    .subtitle,
    .timeline-desc,
    .timeline-desc li,
    .challenge-text {
      font-size: 1.0625rem;
      line-height: 1.7;
      margin-bottom: 1.25rem;
    }
  }
  
  @media screen and (max-width: 480px) {
    .subtitle,
    .timeline-desc,
    .timeline-desc li,
    .challenge-text {
      font-size: 1rem;
      line-height: 1.6;
      margin-bottom: 1rem;
    }
  }