:root {
  --bg: #f5f7fb;
  --bg-2: #eef2f7;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --line: #e7ebf2;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-soft: #eaf1ff;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 18px 44px rgba(15, 23, 42, 0.10);
  --radius: 22px;
  --container: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #f8fafc 0%, #f3f6fb 100%);
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
img { display: block; max-width: 100%; }
.container { width: min(var(--container), calc(100% - 28px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(231,235,242,.9);
}
.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  box-shadow: 0 8px 20px rgba(37,99,235,.12);
  flex: 0 0 42px;
}
.brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.brand-text strong {
  display: block;
  font-size: 1rem;
}
.brand-text small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: .78rem;
}
.nav-toggle {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: #111827;
  border-radius: 999px;
}
.nav-menu {
  position: absolute;
  left: 14px;
  right: 14px;
  top: calc(100% + 10px);
  display: none;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  background: rgba(255,255,255,.98);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.nav-menu.open { display: flex; }
.nav-link {
  padding: 12px 14px;
  border-radius: 14px;
  color: #4b5563;
  background: #f8fafc;
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.hero-section {
  padding: 18px 0 8px;
}
.hero-slider {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: 12px;
  box-shadow: var(--shadow);
}
.slider-track {
  min-height: 52vh;
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  background: #dde7f5;
}
.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: .42s ease;
}
.slide.active {
  opacity: 1;
  visibility: visible;
}
.slide-link {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
}
.slide-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (min-width: 768px) {
  .slider-track {
    background: #f3f6fb;
  }
  .slide-link {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f3f6fb;
  }
  .slide-image {
    object-fit: contain;
    background: #f3f6fb;
  }
}
.slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.03), rgba(0,0,0,.08) 42%, rgba(0,0,0,.46));
}
.slide-content {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 24px rgba(15,23,42,.08);
}
.slide-badge {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: .74rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-soft);
}
.slide-content h3 {
  margin: 10px 0 8px;
  font-size: 1.24rem;
}
.slide-content p {
  margin: 0;
  color: #4b5563;
  line-height: 1.7;
  font-size: .94rem;
}
.slide-cta {
  display: inline-flex;
  margin-top: 12px;
  font-weight: 700;
  color: var(--primary);
}
.slider-bottom {
  margin-top: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.slider-dots {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.slider-dots button {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: 0;
  background: #cbd5e1;
  padding: 0;
}
.slider-dots button.active {
  width: 28px;
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
}
.slider-buttons {
  display: flex;
  gap: 8px;
}
.slider-buttons button {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  color: #334155;
  font-size: 1.2rem;
}

.section-block {
  padding: 22px 0;
  scroll-margin-top: 90px;
}
.section-head {
  margin-bottom: 16px;
}
.section-head.split {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 12px;
  flex-wrap: wrap;
}
.section-head h2 {
  margin: 0;
  font-size: clamp(1.28rem, 4.2vw, 1.72rem);
  line-height: 1.25;
}

.section-head p,
.notice-card p,
.highlight-card p,
.category-card p,
.post-card p,
.site-footer p,
.homepage-note,
.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.35;
  font-size: .82rem;
}

.feature-grid,
.highlight-grid,
.category-grid,
.post-grid {
  display: grid;
  gap: 14px;
}
.feature-card,
.highlight-card,
.category-card,
.post-card,
.notice-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.feature-card,
.category-card,
.post-card {
  padding: 16px;
}
.highlight-card {
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, .16);
  box-shadow: 0 18px 44px rgba(15, 23, 42, .08), 0 4px 14px rgba(15, 23, 42, .04);
}
.feature-card:hover,
.highlight-card:hover,
.category-card:hover,
.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.feature-card,
.highlight-card,
.category-card,
.post-card {
  transition: .22s ease;
}
.feature-card {
  display: flex;
  align-items: center;
  gap: 14px;
}
.feature-icon,
.category-icon {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary);
  background: var(--primary-soft);
  flex: none;
}
.feature-icon-image {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  overflow: hidden;
  padding: 0;
  background: #eef4ff;
  box-shadow: inset 0 0 0 1px rgba(59,130,246,.08);
}
.feature-icon-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.feature-card h3,
.highlight-content h3,
.category-card h3,
.post-card h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}
.feature-card .meta,
.category-card .meta,
.post-card .meta {
  color: #94a3b8;
  font-size: .82rem;
}
.highlight-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(180deg, #eef4ff, #dbeafe);
  overflow: hidden;
}
.highlight-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0) 0%, rgba(15, 23, 42, .14) 100%),
    radial-gradient(circle at top left, rgba(255,255,255,.18), transparent 42%),
    radial-gradient(circle at bottom right, rgba(15,23,42,.10), transparent 38%);
}
.highlight-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1.01);
  filter: saturate(1.04) contrast(1.02);
}
.highlight-content {
  padding: 16px;
}
.highlight-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.highlight-content h3 {
  margin: 0;
  line-height: 1.32;
}
.highlight-content p {
  line-height: 1.55;
}
.highlight-tag,
.notice-label,
.post-tag {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-soft);
}
.category-card {
  display: block;
}
.category-card .top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.notice-card {
  padding: 18px;
  display: grid;
  gap: 14px;
  align-items: center;
  background: linear-gradient(135deg, #ffffff, #f7faff);
}
.notice-card h3 {
  margin: 10px 0 8px;
  font-size: 1.16rem;
}
.notice-btn,
.post-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 14px;
  font-weight: 700;
}
.notice-btn {
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
  color: #fff;
}
.post-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.post-link {
  width: fit-content;
  background: #f8fafc;
  border: 1px solid var(--line);
  color: var(--primary);
}

.site-footer {
  margin-top: 10px;
  padding: 24px 0 calc(28px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.back-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
}
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: .55s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 768px) {
  .container { width: min(var(--container), calc(100% - 40px)); }
  .nav-toggle { display: none; }
  .nav-menu {
    position: static;
    display: flex !important;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
  }
  .nav-link {
    background: transparent;
  }
  .hero-section { padding-top: 24px; }
  .slider-track { min-height: 560px; }
  .feature-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .highlight-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .post-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .notice-card { grid-template-columns: 1fr auto; }
  .footer-inner { flex-direction: row; justify-content: space-between; align-items: center; }
}

@media (max-width: 767px) {
  .feature-grid { grid-template-columns: 1fr; }
  .highlight-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .post-grid { grid-template-columns: 1fr; }
  .section-block { padding: 18px 0; }
  .section-head { margin-bottom: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}



/* category list layout fix */
.category-card {
  display: flex;
  align-items: center;
  gap: 14px;
}

.category-content {
  min-width: 0;
  flex: 1;
}

.category-card h3 {
  margin: 0 0 4px;
}

.category-meta {
  color: #94a3b8;
  font-size: .82rem;
  margin-bottom: 4px;
}

.category-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

@media (max-width: 767px) {
  .category-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  .category-icon {
    flex: none;
  }

  .category-content {
    flex: 1;
    min-width: 0;
  }
}


/* feature card symmetry tune */
.feature-card {
  display: flex;
  align-items: center;
  gap: 12px;
}

.feature-content {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.feature-card h3 {
  margin: 0 0 4px;
  line-height: 1.3;
}

.feature-card p {
  margin: 0;
  line-height: 1.35;
}

.homepage-note {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
  font-size: .82rem;
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
}

.feature-icon-image {
  width: 36px;
  height: 36px;
  border-radius: 12px;
}

@media (max-width: 767px) {
  .feature-card {
    gap: 10px;
    padding: 14px;
  }

  .feature-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
  }

  .feature-icon-image {
    width: 32px;
    height: 32px;
    border-radius: 10px;
  }

  .feature-card h3 {
    margin: 0 0 3px;
    font-size: .98rem;
  }

  .feature-card p {
    font-size: .82rem;
  }

  .homepage-note {
    font-size: .82rem;
  }
}


.highlight-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.highlight-row h3 {
  margin: 0;
  min-width: 0;
  flex: 1;
}

.highlight-row .highlight-tag {
  flex: none;
  white-space: nowrap;
}

@media (max-width: 767px) {
  .highlight-row {
    gap: 8px;
    margin-bottom: 10px;
  }

  .highlight-row .highlight-tag {
    font-size: .68rem;
    padding: 5px 8px;
  }
}