@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+TC:wght@400;600;700&family=Noto+Sans+TC:wght@400;500&display=swap');

/* ===== Design Tokens ===== */
:root {
  --primary:      #4A2C2A;
  --accent:       #C8860A;
  --bg:           #FFFDF9;
  --surface:      #F5EFE6;
  --text:         #2C1810;
  --text-muted:   #7C6259;
  --teal:         #2E7D6E;
  --radius:       12px;
  --shadow:       0 4px 24px rgba(74, 44, 42, .12);
  --max-w:        1140px;
  --transition:   .3s ease;
}

/* ===== Reset ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ===== Base ===== */
body {
  font-family: 'Noto Serif TC', 'Georgia', serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

img {
  display: block;
  max-width: 100%;
}

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

/* ===== Container ===== */
.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

/* ===== Header / Nav ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 253, 249, .75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background var(--transition), box-shadow var(--transition);
}

header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.nav-logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: .02em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: .95rem;
  color: var(--text);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Scrolled state (applied via JS) */
header.scrolled {
  background: rgba(255, 253, 249, .97);
  box-shadow: 0 2px 12px rgba(74, 44, 42, .1);
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: .65em 1.6em;
  border-radius: 6px;
  font-weight: 600;
  font-size: .95rem;
  border: 2px solid var(--accent);
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
}

.btn-primary:hover {
  background: #a86d08;
  border-color: #a86d08;
  box-shadow: 0 4px 12px rgba(200, 134, 10, .35);
}

.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--accent);
  padding: .65em 1.6em;
  border-radius: 6px;
  font-weight: 600;
  font-size: .95rem;
  border: 2px solid var(--accent);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

/* ===== Sections ===== */
section {
  padding: clamp(3rem, 6vw, 5rem) 0;
}

/* ===== Section Title ===== */
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 2.5rem;
  height: 2px;
  background: var(--accent);
}

/* ===== Card ===== */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(74, 44, 42, .18);
}

/* ===== Fade-in animation (driven by JS IntersectionObserver) ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Footer ===== */
footer {
  background: var(--primary);
  color: #E8D5C4;
  padding: 3rem 0;
  text-align: center;
}

footer a {
  color: var(--accent);
}

footer a:hover {
  text-decoration: underline;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr !important;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 90%;
  }
}

/* ── Hero ── */
.hero { position:relative; min-height:100vh; display:flex; align-items:center; overflow:hidden; }
.hero-bg { position:absolute; inset:0; background-image:url('../images2/hero-bg.png'); background-size:cover; background-position:center; }
.hero-bg::after { content:''; position:absolute; inset:0; background:linear-gradient(to bottom,rgba(44,24,16,.55) 0%,rgba(44,24,16,.35) 60%,rgba(44,24,16,.65) 100%); }
.hero-content { position:relative; z-index:1; color:#fff; padding-block:8rem 4rem; max-width:680px; }
.hero-sub { font-size:.95rem; letter-spacing:.2em; text-transform:uppercase; color:var(--accent); margin-bottom:.75rem; }
.hero-content h1 { font-size:clamp(2rem,5vw,3.8rem); line-height:1.25; margin-bottom:1.25rem; }
.hero-desc { font-size:clamp(1rem,2vw,1.15rem); opacity:.9; margin-bottom:2rem; line-height:1.8; }
.hero-btns { display:flex; gap:1rem; flex-wrap:wrap; }

/* ── Features ── */
.features-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:2rem; margin-top:2.5rem; }
.feature-card { background:var(--surface); border-radius:var(--radius); padding:2rem 1.75rem; text-align:center; box-shadow:var(--shadow); transition:var(--transition); }
.feature-card:hover { transform:translateY(-4px); }
.feature-icon { font-size:2.5rem; margin-bottom:1rem; }
.feature-card h3 { font-size:1.15rem; color:var(--primary); margin-bottom:.5rem; }

/* ── Signature ── */
.signature { background:var(--surface); }
.sig-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(270px,1fr)); gap:2rem; margin-top:2.5rem; }
.sig-img-wrap { height:200px; overflow:hidden; }
.sig-img-wrap img { width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
.sig-item:hover .sig-img-wrap img { transform:scale(1.05); }
.sig-info { padding:1.25rem 1.5rem; }
.sig-info h3 { font-size:1.1rem; color:var(--primary); margin-bottom:.4rem; }
.sig-info p { font-size:.9rem; color:var(--text-muted); }
.price { display:inline-block; margin-top:.75rem; font-weight:700; color:var(--accent); font-size:1.1rem; }

/* ── About Teaser ── */
.about-teaser-inner { display:grid; grid-template-columns:1fr 1fr; gap:3rem; align-items:center; }
.about-teaser-img img { width:100%; border-radius:var(--radius); box-shadow:var(--shadow); }
@media (max-width:768px) { .about-teaser-inner { grid-template-columns:1fr; } }

/* ── Header / Nav ── */
#site-header { position:fixed; top:0; left:0; right:0; z-index:100; padding:.9rem 0; transition:var(--transition); }
#site-header.scrolled { background:rgba(255,253,249,.97); box-shadow:0 2px 12px rgba(74,44,42,.1); }
.nav-container { display:flex; align-items:center; justify-content:space-between; }
.logo { font-size:1.3rem; font-weight:700; color:#fff; text-decoration:none; transition:color var(--transition); }
#site-header.scrolled .logo { color:var(--primary); }
.nav-links { display:flex; list-style:none; gap:2rem; }
.nav-links a { text-decoration:none; color:#fff; font-size:.95rem; position:relative; transition:color var(--transition); }
#site-header.scrolled .nav-links a { color:var(--text); }
.nav-links a::after { content:''; position:absolute; bottom:-3px; left:0; width:0; height:2px; background:var(--accent); transition:width var(--transition); }
.nav-links a:hover::after,.nav-links a.active::after { width:100%; }

/* ── Footer ── */
.footer-logo { font-size:1.5rem; font-weight:700; margin-bottom:.5rem; }
.footer-nav { display:flex; justify-content:center; gap:2rem; flex-wrap:wrap; }
.footer-nav a { color:#E8D5C4; text-decoration:none; font-size:.9rem; opacity:.8; transition:opacity var(--transition); }
.footer-nav a:hover { opacity:1; }

/* ── Fade-in animation ── */
.fade-in { opacity:0; transform:translateY(20px); transition:opacity .6s ease,transform .6s ease; }
.fade-in.visible { opacity:1; transform:none; }