*{box-sizing:border-box}
html,body{height:100%}
:root{
  --bg:#f2f4fa;
  --card-bg:#ffffff;
  --item-bg:#e5e9f3;
  --text:#0f172a;
  --muted:#475569;
  --brand:#1a4fd8;
  --border:#e2e8f0;
  --shadow:0 8px 24px rgba(15,23,42,.08);
}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
.container,.wrap{max-width:1100px;margin:0 auto;padding:0 24px}
.site-header{position:sticky;top:0;background:#ffffff;border-bottom:1px solid var(--border);z-index:10}
.site-header .bar{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.site-logo{display:inline-flex;align-items:center;text-decoration:none}
.site-logo img{display:block;height:32px;width:auto}
.header-cta{display:inline-flex;align-items:center;justify-content:center;padding:8px 14px;border-radius:999px;background:var(--brand);color:#ffffff;text-decoration:none;font-weight:600;font-size:13px;box-shadow:0 4px 14px rgba(26,79,216,.25)}
.header-cta:hover{background:#163fb0}
main{padding:28px 0}
h2{margin:0 0 12px;font-size:24px;color:var(--text)}
h3{margin:18px 0 10px;font-size:18px;color:var(--text)}
.section{margin:0 0 28px}
.card-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.card-list li{background:var(--item-bg);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow)}
.card-list a{display:block;padding:16px 14px;color:var(--text);text-decoration:none;font-weight:600}
.card-list a:hover{color:var(--brand)}
.category-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media (min-width:640px){
  .category-grid{grid-template-columns:repeat(2,1fr)}
}
.category-card{margin:0;padding:14px 14px 18px;border-radius:16px;background:var(--card-bg);border:1px solid var(--border);box-shadow:var(--shadow)}
.category-image{display:block;width:100%;height:auto;border-radius:12px;margin:0 0 10px}
.category-card h2,.category-card h3{margin:4px 0 10px;font-size:18px;color:var(--text)}
.category-card .card-list{margin-top:6px}
.category-card .card-list li{box-shadow:none}
.site-footer{background:#ffffff;border-top:1px solid var(--border);margin-top:24px}
.site-footer p{margin:0;padding:16px 0;font-size:13px;color:var(--muted);text-align:center}
.about{margin:32px 0 0;font-size:14px;color:var(--muted);max-width:760px}
.about p{margin:0 0 10px}
.faq{margin:40px 0 0;max-width:760px}
.faq h2{font-size:22px;margin:0 0 16px}
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{background:#ffffff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);padding:0;overflow:hidden}
.faq-item summary{cursor:pointer;list-style:none;padding:14px 16px;font-weight:600;color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:8px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open] summary{border-bottom:1px solid var(--border);background:rgba(26,79,216,.03)}
.faq-item summary::after{content:"▾";font-size:14px;color:var(--muted);transition:transform .2s ease}
.faq-item[open] summary::after{transform:rotate(-180deg)}
.faq-body{padding:12px 16px 14px;font-size:14px;color:var(--muted)}
.faq-body p{margin:0 0 10px}
.faq-body ul{margin:0 0 10px 18px;padding:0}

.tg-banner {
  display: block;
  background: linear-gradient(135deg, #24A1DE 0%, #1c85b8 100%);
  color: #ffffff;
  text-decoration: none;
  border-radius: 16px;
  padding: 32px 24px;
  margin-bottom: 28px;
  text-align: center;
  box-shadow: 0 10px 25px rgba(36, 161, 222, 0.3);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}

.tg-banner:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(36, 161, 222, 0.4);
}

.tg-banner::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.tg-banner-title {
  display: block;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.tg-banner-subtitle {
  display: block;
  font-size: 16px;
  opacity: 0.9;
  font-weight: 400;
}

.tg-banner-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: #ffffff;
  border-radius: 50%;
  margin-bottom: 16px;
}

.tg-banner-icon svg {
  width: 28px;
  height: 28px;
  fill: #24A1DE;
}

@media (max-width: 640px) {
  .tg-banner {
    padding: 24px 16px;
  }
  .tg-banner-title {
    font-size: 20px;
  }
}

@media (max-width:1023px){
  .site-header .bar{padding:10px 16px}
}
@media (min-width:1024px){
  .card-list{grid-auto-columns:minmax(300px,1fr)}
  .category-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
}

/* Recommended Section */
.recommended-section {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.recommended-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}

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

.recommended-item {
  display: block;
  text-decoration: none;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-align: center;
}

.recommended-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.recommended-item img {
  width: 100%;
  height: auto;
  aspect-ratio: 1/1;
  object-fit: contain;
  border-radius: 8px;
  margin-bottom: 10px;
  background: #f8fafc;
}

.recommended-item span {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

@media (max-width: 640px) {
  .recommended-grid {
    grid-template-columns: 1fr;
  }
  .recommended-item {
    display: flex;
    align-items: center;
    text-align: left;
    padding: 8px;
  }
  .recommended-item img {
    width: 80px;
    height: 80px;
    margin-bottom: 0;
    margin-right: 12px;
  }
}