.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--nav-height);
  transition: box-shadow var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.site-logo:hover {
  color: var(--color-primary-light);
}

.site-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.2rem;
  font-weight: 800;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-bg);
  font-weight: 600;
}

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

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-white);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 767px) {
  .mobile-menu-btn {
    display: flex;
  }
  .site-nav {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 4px;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
  }
  .site-nav.open {
    transform: translateX(0);
  }
  .nav-link {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
  }
}

.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 56px 0 32px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
}

.footer-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

@media (max-width: 767px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

.ad-container {
  margin: 32px 0;
  overflow: hidden;
  border-radius: var(--radius-md);
}

.ad-container.ad-sidebar {
  margin: 0;
  position: sticky;
  top: calc(var(--nav-height) + 24px);
}

.ad-label {
  display: block;
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.ad-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 90px;
  background: var(--color-bg-alt);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  padding: 16px;
  text-align: center;
}

.ad-placeholder.ad-banner {
  min-height: 90px;
  max-width: 728px;
  margin: 0 auto;
}

.ad-placeholder.ad-sidebar-placeholder {
  min-height: 250px;
  width: 300px;
}

.ad-placeholder.ad-inline {
  min-height: 100px;
  max-width: 100%;
}

.hero-section {
  background: linear-gradient(160deg, #E8F0EC 0%, #F5F2EB 40%, #FAF7F2 100%);
  padding: 72px 0 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -60px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 162, 97, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: -40px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(44, 95, 79, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.hero-title span {
  color: var(--color-accent);
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 767px) {
  .hero-section {
    padding: 52px 0 48px;
  }
  .hero-title {
    font-size: 1.9rem;
  }
  .hero-desc {
    font-size: 1rem;
  }
}

.table-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.table-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.table-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.table-card:hover::before {
  opacity: 1;
}

.table-card-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  display: block;
}

.table-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.table-card-desc {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.5;
}

.table-card-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.table-card .badge {
  font-size: 0.75rem;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.section-desc {
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
  font-size: 0.95rem;
}

.grade-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grade-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  padding: 32px 28px;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.grade-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.grade-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.grade-card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-bg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.grade-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
}

.grade-card-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.grade-card-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.grade-card-list .badge {
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.grade-card-list .badge:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

@media (max-width: 1023px) {
  .grade-cards {
    grid-template-columns: 1fr;
  }
}

.category-section {
  background: var(--color-bg-alt);
  border-radius: var(--radius-xl);
  padding: 48px 36px;
  margin-bottom: 32px;
}

.category-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.category-title-icon {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 1.1rem;
}

.category-title-text {
  font-size: 1.3rem;
  font-weight: 700;
}

@media (max-width: 767px) {
  .category-section {
    padding: 32px 20px;
  }
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 16px 20px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  border-right: 1px solid var(--color-border-light);
}

.toolbar-group:last-child {
  border-right: none;
}

.toolbar-label {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-right: 4px;
}

.toolbar-btn {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.toolbar-btn:hover {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.toolbar-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.toolbar-btn.print-btn {
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 600;
  padding: 8px 20px;
  font-size: 0.9rem;
}

.toolbar-btn.print-btn:hover {
  background: var(--color-accent-dark);
  transform: scale(1.03);
}

@media (max-width: 767px) {
  .toolbar {
    padding: 12px;
    gap: 8px;
  }
  .toolbar-group {
    border-right: none;
    padding: 0;
  }
  .toolbar-btn {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
}

.table-print-area {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  padding: 40px 32px;
  box-shadow: var(--shadow-md);
  overflow-x: auto;
}

.table-print-area .print-title {
  display: none;
}

.table-print-area .print-subtitle {
  display: none;
}

.table-print-area table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 auto;
}

.table-print-area table th,
.table-print-area table td {
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: center;
  font-size: 0.95rem;
  transition: background var(--transition-fast);
}

.table-print-area table th {
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 0.9rem;
}

.table-print-area table tbody tr:nth-child(even) td {
  background: #F9F9F7;
}

.table-print-area table tbody tr:hover td {
  background: #EEF5F2;
}

.table-print-area.large-font table th,
.table-print-area.large-font table td {
  font-size: 1.25rem;
  padding: 14px 18px;
}

.table-print-area.compact table th,
.table-print-area.compact table td {
  font-size: 0.8rem;
  padding: 5px 8px;
}

.table-print-area.blank-mode .answer-cell {
  color: transparent;
  user-select: none;
}

@media (max-width: 767px) {
  .table-print-area {
    padding: 20px 12px;
  }
  .table-print-area table th,
  .table-print-area table td {
    padding: 6px 8px;
    font-size: 0.8rem;
  }
}

.guide-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}

.guide-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 24px);
}

.guide-nav {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  padding: 16px;
}

.guide-nav-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  padding: 0 8px;
}

.guide-nav-item {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.guide-nav-item:hover {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.guide-nav-item.active {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  font-weight: 600;
}

.guide-content {
  max-width: 800px;
}

.guide-content h2 {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary-bg);
}

.guide-content h3 {
  margin: 28px 0 12px;
  color: var(--color-primary-dark);
}

.guide-content p {
  margin-bottom: 16px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.guide-content ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 16px;
}

.guide-content ul li {
  margin-bottom: 8px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.faq-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--color-white);
}

.faq-question {
  width: 100%;
  padding: 16px 20px;
  text-align: left;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--color-primary-bg);
}

.faq-question .faq-arrow {
  font-size: 0.8rem;
  transition: transform var(--transition-fast);
  color: var(--color-text-muted);
}

.faq-item.open .faq-question .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 20px 20px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  font-size: 0.95rem;
}

@media (max-width: 767px) {
  .guide-layout {
    grid-template-columns: 1fr;
  }
  .guide-sidebar {
    position: static;
    margin-bottom: 24px;
  }
  .guide-nav {
    display: flex;
    gap: 4px;
    overflow-x: auto;
    padding: 8px;
  }
  .guide-nav-title {
    display: none;
  }
  .guide-nav-item {
    white-space: nowrap;
    font-size: 0.82rem;
    padding: 6px 12px;
  }
}

.about-card {
  max-width: 640px;
  margin: 0 auto;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
  padding: 48px 40px;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.about-icon {
  font-size: 3rem;
  margin-bottom: 24px;
}

.about-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.about-desc {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.about-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 32px;
  text-align: left;
}

.about-info-item {
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
}

.about-info-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.about-info-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.about-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--color-primary-bg);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--color-primary);
  font-weight: 600;
  border: 1px solid var(--color-primary);
  border-style: dashed;
  margin-bottom: 16px;
  word-break: break-all;
}

.about-email-hint {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

@media (max-width: 767px) {
  .about-card {
    padding: 32px 20px;
  }
  .about-info {
    grid-template-columns: 1fr;
  }
}

.watermark-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.04;
}

.page-transition {
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.card-enter {
  animation: cardEnter 0.4s ease-out forwards;
  opacity: 0;
}

@keyframes cardEnter {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.tab-filter {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  margin-bottom: 32px;
  overflow-x: auto;
}

.tab-filter-btn {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tab-filter-btn:hover {
  color: var(--color-primary);
}

.tab-filter-btn.active {
  background: var(--color-white);
  color: var(--color-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}