/* ============================================
   高豐登光電 - 官方網站樣式
   深色底 + 藍青色點綴（呼應品牌偏好）
   ============================================ */
:root {
  --bg: #0d1117;
  --bg-alt: #161b22;
  --card: #1c2330;
  --border: #2d3748;
  --text: #e6edf3;
  --text-dim: #9fb0c3;
  --primary: #00c6ff;
  --primary-2: #00e5ff;
  --accent: #2dd4bf;
  --gold: #ffd166;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0,0,0,0.4);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(13,17,23,0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text); }
.brand-logo {
  width: 48px; height: 48px;
  object-fit: contain;
  border-radius: 12px;
  background: #ffffff;
  padding: 4px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 18px; letter-spacing: 1px; }
.brand-text small { font-size: 11px; color: var(--text-dim); }

.main-nav { display: flex; align-items: center; gap: 26px; }
.main-nav a { color: var(--text-dim); text-decoration: none; font-size: 15px; transition: color .2s; }
.main-nav a:hover { color: var(--primary-2); }
.nav-call {
  background: var(--primary);
  color: #04222e !important;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 8px;
}
.nav-call:hover { background: var(--primary-2); color: #04222e !important; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 26px; height: 3px; background: var(--text); border-radius: 3px; transition: .3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex; align-items: center;
  background:
    linear-gradient(135deg, rgba(0,198,255,0.15), rgba(13,17,23,0.8)),
    radial-gradient(circle at 80% 20%, rgba(0,229,255,0.12), transparent 50%),
    #0d1117;
  padding: 120px 0 80px;
}
.hero-overlay { position: absolute; inset: 0; pointer-events: none; }
.hero-content { position: relative; z-index: 2; }
.hero-badge {
  display: inline-block;
  background: rgba(0,198,255,0.15);
  color: var(--accent);
  border: 1px solid rgba(45,212,191,0.4);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 14px;
  margin-bottom: 20px;
}
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.25; font-weight: 900; margin-bottom: 20px; }
.hero h1 .accent { color: var(--primary-2); }
.hero p { font-size: clamp(1rem, 1.5vw, 1.2rem); color: var(--text-dim); margin-bottom: 30px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 36px; flex-direction: column; align-items: flex-start; }
.hero-actions .btn-full { flex: 1 0 100%; margin: 0; }
.hero-actions .btn:nth-child(4) { order: 4; }
.hero-trust { display: flex; gap: 22px; flex-wrap: wrap; font-size: 14px; color: var(--text-dim); }
.hero-trust span { display: flex; align-items: center; gap: 6px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
  transition: all .25s;
  border: 2px solid transparent;
}
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #04222e; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,198,255,0.35); }
.btn-ghost { border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary-2); }
.btn-outline { border-color: var(--primary); color: var(--primary-2); text-align: center; }
.btn-outline:hover { background: var(--primary); color: #04222e; }
.btn-line { background: #06C755; color: #ffffff !important; }
.btn-line:hover { background: #05a848; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(6,199,85,0.4); }

/* Facebook 藍底白字（官方品牌）#1877F2 */
.btn-facebook { background: #1877F2; color: #ffffff !important; }
.btn-facebook:hover { background: #0e62d1; color: #ffffff !important; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(24,119,242,0.4); }

/* ---------- Sections ---------- */
.section { padding: 90px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { text-align: center; margin-bottom: 50px; }
.section-tag {
  display: inline-block;
  color: var(--primary-2);
  font-size: 13px;
  letter-spacing: 3px;
  font-weight: 700;
  margin-bottom: 10px;
}
.section-head h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 900; margin-bottom: 10px; }
.section-head p { color: var(--text-dim); }

/* ---------- Grid / Cards ---------- */
.grid { display: grid; gap: 24px; }
.services-grid { grid-template-columns: repeat(3, 1fr); }
.why-grid { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: var(--shadow); }
.service-card .icon, .why-card .icon { font-size: 38px; margin-bottom: 16px; }
.service-card h3, .why-card h3 { font-size: 19px; margin-bottom: 10px; }
.service-card p, .why-card p { color: var(--text-dim); font-size: 15px; }

/* ---------- Pricing ---------- */
.pricing-grid { grid-template-columns: repeat(3, 1fr); align-items: stretch; }
.pricing-card { display: flex; flex-direction: column; position: relative; }
.pricing-card h3 { font-size: 20px; margin-bottom: 8px; }
.price { font-size: 1.8rem; font-weight: 900; color: var(--gold); margin-bottom: 20px; }
.pricing-card ul { list-style: none; margin-bottom: 26px; flex: 1; }
.pricing-card li { padding: 8px 0; color: var(--text-dim); border-bottom: 1px dashed var(--border); font-size: 15px; }
.pricing-card li::before { content: "✓ "; color: var(--accent); font-weight: 700; }
.pricing-card .btn { margin-top: auto; }
.pricing-card.featured { border: 2px solid var(--primary); }
.price-tag {
  position: absolute;
  top: -14px; right: 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #04222e;
  font-weight: 900;
  padding: 5px 14px;
  border-radius: 100px;
  font-size: 13px;
}
.note { text-align: center; color: var(--text-dim); font-size: 13px; margin-top: 24px; }

/* ---------- Cases ---------- */
.case-grid { grid-template-columns: repeat(3, 1fr); }
.case-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--card);
  border: 1px solid var(--border);
}
.case-item img { width: 100%; height: 100%; object-fit: contain; display: block; transition: transform .4s; }
.case-item:hover img { transform: scale(1.05); }
.case-caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 30px 16px 12px;
  background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
  font-size: 14px; font-weight: 500;
}

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.contact-card h3 { font-size: 20px; margin-bottom: 18px; }
.contact-list { list-style: none; }
.contact-list li { padding: 9px 0; color: var(--text-dim); font-size: 15px; }
.contact-list a { color: var(--primary-2); text-decoration: none; }
.contact-list strong { color: var(--text); }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }

/* ---------- Footer ---------- */
.site-footer {
  background: #090c12;
  border-top: 1px solid var(--border);
  padding: 34px 0;
  text-align: center;
}
.footer-inner p { color: var(--text-dim); font-size: 14px; }
.footer-inner p + p { margin-top: 6px; font-size: 13px; }

/* ---------- Sticky Call ---------- */
.sticky-call {
  display: none;
  position: fixed; left: 0; right: 0; bottom: 0;
  z-index: 90;
  padding: 10px 16px;
  background: rgba(13,17,23,0.95);
  border-top: 1px solid var(--primary);
}
.sticky-call a {
  display: block;
  text-align: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #04222e;
  font-weight: 900;
  padding: 13px;
  border-radius: 10px;
  text-decoration: none;
  font-size: 16px;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(13,17,23,0.98);
    padding: 20px;
    gap: 6px;
    transform: translateY(-140%);
    transition: transform .3s;
    border-bottom: 1px solid var(--border);
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav a { padding: 14px; border-radius: 8px; }
  .main-nav a:hover { background: rgba(0,198,255,0.1); }
  .hero { min-height: auto; padding: 110px 0 60px; }
  .only-md { display: none; }
}
@media (max-width: 560px) {
  .services-grid, .why-grid, .case-grid, .pricing-grid, .contact-grid { grid-template-columns: 1fr; }
  .sticky-call { display: block; }
  body { padding-bottom: 0; }
  .section { padding: 60px 0; }
}