:root {
  --aten-blue: #003a70;
  --aten-blue-2: #1d5cae;
  --aten-green: #82c341;
  --aten-orange: #f08226;
  --aten-bg: #ffffff;
  --aten-text: #1a1a1a;
  --aten-muted: #6b7280;
  --aten-border: #e5e7eb;
  --aten-soft: #f7f9fc;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--aten-bg);
  color: var(--aten-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

/* ----- Topbar ----- */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: #ffffff;
  border-bottom: 1px solid var(--aten-border);
}
.topbar-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 14px 28px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.logo-area { display: flex; align-items: center; gap: 16px; }
.logo-mark {
  font-weight: 800; font-size: 22px; letter-spacing: 1px;
  color: var(--aten-blue);
  font-family: "Arial Black", sans-serif;
}
.tagline {
  font-size: 12px; color: var(--aten-muted);
  border-left: 1px solid var(--aten-border);
  padding-left: 16px;
}
.primary-nav { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.primary-nav a { color: #2c3e50; transition: color .15s; }
.primary-nav a:hover { color: var(--aten-blue-2); }
.primary-nav .cta-pill {
  border: 1.5px solid var(--aten-green);
  border-radius: 999px;
  padding: 7px 16px;
  font-weight: 600;
}
.primary-nav .cta-pill:hover { background: var(--aten-green); color: #fff; }

@media (max-width: 820px) {
  .primary-nav { display: none; }
}

/* ----- Hero ----- */
.hero {
  background:
    radial-gradient(1200px 400px at 75% -50px, rgba(240,130,38,.18), transparent 60%),
    linear-gradient(180deg, #07101e 0%, #0a1c33 100%);
  color: #ffffff;
  padding: 70px 0 80px;
  overflow: hidden;
}
.hero-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 0 28px;
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px;
  align-items: center;
}
.hero-copy .kicker {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(130,195,65,0.18);
  color: var(--aten-green);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.hero-copy h1 {
  margin: 0 0 18px;
  font-size: 44px;
  line-height: 1.2;
  font-weight: 700;
}
.hero-copy p {
  font-size: 16px;
  color: rgba(255,255,255,0.78);
  max-width: 540px;
  margin: 0 0 28px;
}
.hero-copy strong { color: #fff; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-primary, .btn-ghost {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 8px;
  font-weight: 600; font-size: 14px;
  transition: all .15s;
  cursor: pointer;
}
.btn-primary {
  background: var(--aten-orange);
  color: #fff;
}
.btn-primary:hover { background: #d96d18; transform: translateY(-1px); }
.btn-ghost {
  background: transparent; color: #fff;
  border: 1px solid rgba(255,255,255,0.4);
}
.btn-ghost:hover { background: rgba(255,255,255,0.08); }

.hero-visual { display: flex; justify-content: center; }
.hero-card {
  width: 100%; max-width: 440px;
  background: rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 22px;
  display: flex; flex-direction: column; gap: 14px;
  backdrop-filter: blur(6px);
  box-shadow:
    0 30px 60px -20px rgba(240,130,38,0.25),
    inset 0 1px 0 rgba(255,255,255,0.05);
}
.hero-card-row { display: flex; gap: 14px; }
.hero-thumb {
  flex: 1; aspect-ratio: 4/3;
  border-radius: 10px;
  background:
    linear-gradient(135deg, #1a1a1a, #2a2a2a);
  border: 1px solid rgba(255,255,255,0.06);
  position: relative;
  overflow: hidden;
}
.hero-thumb::before {
  content: ''; position: absolute; inset: 22% 28% 20% 24%;
  border-radius: 4px;
  background: linear-gradient(180deg, #2a2a2a, #1a1a1a);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 0 24px rgba(240,130,38,0.25);
}
.hero-thumb-2::before { inset: 30% 20% 30% 20%; }
.hero-thumb.wide { aspect-ratio: 16/6; }
.hero-thumb.wide::before { inset: 28% 12% 28% 12%; }
.hero-card-caption { text-align: center; padding-top: 8px; }
.essentials {
  font-size: 32px;
  letter-spacing: 4px;
  color: var(--aten-orange);
  font-weight: 300;
  font-style: italic;
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-copy h1 { font-size: 32px; }
}

/* ----- Features ----- */
.features { padding: 80px 0; background: var(--aten-soft); }
.features-inner {
  max-width: 1100px; margin: 0 auto; padding: 0 28px;
}
.features h2 {
  font-size: 32px; margin: 0 0 36px;
  text-align: center;
  color: var(--aten-blue);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--aten-border);
  border-radius: 12px;
  padding: 28px 24px;
  text-align: left;
  transition: transform .2s, box-shadow .2s;
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px -8px rgba(0,58,112,0.18);
}
.feature-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--aten-blue), var(--aten-blue-2));
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; color: #fff;
  margin-bottom: 14px;
}
.feature-card h3 { margin: 0 0 8px; font-size: 17px; color: var(--aten-blue); }
.feature-card p { margin: 0; color: #4b5563; font-size: 14px; }

@media (max-width: 820px) {
  .features-grid { grid-template-columns: 1fr; }
}

/* ----- Try-it ----- */
.try-it { padding: 70px 0; }
.try-it-inner {
  max-width: 760px; margin: 0 auto; padding: 0 28px; text-align: center;
}
.try-it h2 { font-size: 28px; color: var(--aten-blue); margin: 0 0 12px; }
.try-it p { color: var(--aten-muted); margin: 0 0 24px; }
.suggestion-list {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 10px;
}
.suggestion-list li {
  background: #fff;
  border: 1px solid var(--aten-border);
  border-left: 4px solid var(--aten-orange);
  border-radius: 8px;
  padding: 14px 18px;
  text-align: left;
  font-size: 14px;
  color: #2c3e50;
}

/* ----- How to embed ----- */
.how-to-embed { padding: 80px 0; background: var(--aten-soft); }
.how-inner {
  max-width: 880px; margin: 0 auto; padding: 0 28px;
}
.how-to-embed h2 { color: var(--aten-blue); margin: 0 0 12px; }
.how-to-embed h3 { font-size: 16px; margin: 28px 0 8px; color: var(--aten-blue); }
.how-to-embed p { color: #374151; }
.how-to-embed pre {
  background: #0d1b2a; color: #e6f0ff;
  padding: 22px;
  border-radius: 12px;
  font-size: 13px;
  overflow-x: auto;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  line-height: 1.6;
  margin: 16px 0;
}
.how-to-embed code:not(pre code) {
  background: #fff;
  border: 1px solid var(--aten-border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--aten-blue);
}
.how-to-embed ul { padding-left: 20px; color: #374151; }
.how-to-embed ul li { margin-bottom: 6px; }

/* ----- Footer ----- */
.site-footer {
  text-align: center;
  padding: 28px 20px;
  color: var(--aten-muted);
  font-size: 13px;
  border-top: 1px solid var(--aten-border);
}