.t1-body { font-family: 'IBM Plex Sans Thai', sans-serif; background: #fafafa; color: #111; margin: 0; min-height: 100vh; }
.t1-header { background: #fff; border-bottom: 1px solid #e5e5e5; position: sticky; top: 0; z-index: 100; }
.t1-header-inner { max-width: 1100px; margin: 0 auto; padding: 1rem 1.5rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.t1-logo { font-size: 1.25rem; font-weight: 700; color: #0f172a; text-decoration: none; }
.t1-nav-check { display: none; }
.t1-ham { display: none; }
.t1-ham span { display: block; width: 22px; height: 2px; background: #333; }
.t1-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; align-items: center; }
.t1-nav a { color: #64748b; text-decoration: none; font-size: 0.95rem; padding: 0.4rem 0.6rem; border-radius: 6px; }
.t1-nav a:hover { color: #0f172a; background: #f1f5f9; }
.t1-nav a.t1-active { color: #0369a1; background: #e0f2fe; }
.t1-back { color: #94a3b8 !important; }
.t1-main { max-width: 720px; margin: 0 auto; padding: 3rem 1.5rem 4rem; }
.t1-footer { border-top: 1px solid #e5e5e5; background: #fff; padding: 1.5rem; }
.t1-footer-inner { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; flex-wrap: wrap; font-size: 0.875rem; color: #64748b; }
.t1-footer a { color: #0369a1; }
.t1-hero { text-align: center; padding: 3rem 0 4rem; }
.t1-hero-inner { max-width: 560px; margin: 0 auto; }
.t1-hero-img { border-radius: 16px; margin-bottom: 1.5rem; }
.t1-hero-title { font-size: 2.5rem; font-weight: 700; color: #0f172a; margin: 0 0 0.5rem; }
.t1-hero-desc { font-size: 1.125rem; color: #64748b; margin: 0; }
.t1-block { padding: 2.5rem 0; border-top: 1px solid #e5e5e5; }
.t1-block-title { font-size: 1.125rem; font-weight: 600; color: #0f172a; margin: 0 0 1rem; }
.t1-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1rem; }
.t1-card { background: #fff; border: 1px solid #e5e5e5; border-radius: 12px; padding: 1.5rem; text-align: center; }
.t1-card-num { display: block; font-size: 1.75rem; font-weight: 700; color: #0369a1; }
.t1-card-label { font-size: 0.875rem; color: #64748b; }
.t1-list { list-style: none; padding: 0; margin: 0 0 1rem; }
.t1-list a { color: #0369a1; text-decoration: none; }
.t1-more { color: #0369a1; font-weight: 500; text-decoration: none; }
.t1-btns { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1rem; }
.t1-btn { display: inline-block; padding: 0.6rem 1.25rem; background: #0f172a; color: #fff !important; border-radius: 8px; text-decoration: none; font-weight: 500; }
.t1-btn:hover { background: #1e293b; }
@media (max-width: 768px) {
  .t1-ham { display: flex; flex-direction: column; gap: 5px; cursor: pointer; }
  .t1-nav { position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; padding: 1rem; max-height: 0; overflow: hidden; opacity: 0; transition: max-height 0.3s, opacity 0.2s; border-bottom: 1px solid #e5e5e5; }
  .t1-nav-check:checked ~ .t1-nav { max-height: 320px; opacity: 1; }
  .t1-cards { grid-template-columns: 1fr; }
}
.t1-main .demo-page .demo-section h1, .t1-main .demo-page .demo-section h2 { font-size: 1.25rem; color: #0f172a; margin-bottom: 0.75rem; }
.t1-main .demo-page .demo-section p, .t1-main .demo-page .demo-content { color: #475569; line-height: 1.7; }
.t1-main .demo-placeholder-card { background: #fff; border: 1px solid #e5e5e5; border-radius: 8px; padding: 1rem; }