/* ═══════════════════════════════════════════
   隆泰帳篷企業社 — Global Stylesheet
   ═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700;900&family=Playfair+Display:wght@700;900&display=swap');

:root {
  --bg-primary: #0f1115;
  --bg-secondary: #181b22;
  --bg-card: #1e222b;
  --bg-card-hover: #252a35;
  --accent: #c8a45a;
  --accent-light: #e2c97e;
  --accent-dark: #a07d30;
  --text-primary: #eaedf2;
  --text-secondary: #9da3b0;
  --text-muted: #5f6573;
  --border: rgba(200,164,90,0.12);
  --border-strong: rgba(200,164,90,0.3);
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --radius: 6px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: 'Noto Sans TC', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; }
img { max-width: 100%; display: block; }

/* ═══════ NAV ═══════ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(15,17,21,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem; height: 72px;
}
.nav-logo {
  font-weight: 900; font-size: 1.25rem;
  color: var(--accent); text-decoration: none;
  letter-spacing: 2px;
}
.nav-logo span { color: var(--text-secondary); font-weight: 400; font-size: 0.8rem; margin-left: 0.5rem; letter-spacing: 0; }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  color: var(--text-secondary); text-decoration: none;
  font-size: 0.9rem; font-weight: 500;
  position: relative; transition: color 0.3s;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--accent);
  transition: width 0.3s;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--accent); }
.nav-links a.active::after { width: 100%; }
.nav-cta {
  background: var(--accent); color: var(--bg-primary);
  padding: 0.55rem 1.4rem; border-radius: var(--radius);
  text-decoration: none; font-weight: 700; font-size: 0.85rem;
  letter-spacing: 1px; transition: all 0.3s;
}
.nav-cta:hover { background: var(--accent-light); transform: translateY(-1px); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-secondary); transition: 0.3s; }

/* ═══════ SHARED SECTION ═══════ */
section { padding: 6rem 2rem; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 4rem; }
.section-label {
  display: inline-block;
  font-size: 0.75rem; font-weight: 700; letter-spacing: 3px;
  color: var(--accent); text-transform: uppercase;
  margin-bottom: 1rem;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 900; margin-bottom: 1rem;
}
.section-desc {
  color: var(--text-secondary); max-width: 600px; margin: 0 auto;
  font-size: 1rem; font-weight: 300;
}
.divider-line {
  width: 60px; height: 3px; background: var(--accent);
  margin: 1.5rem auto 0; border-radius: 2px;
}

/* ═══════ BUTTONS ═══════ */
.btn-primary {
  display: inline-block;
  background: var(--accent); color: var(--bg-primary);
  padding: 0.9rem 2.2rem; border-radius: var(--radius);
  text-decoration: none; font-weight: 700; font-size: 0.95rem;
  letter-spacing: 1px; transition: all 0.3s; border: none; cursor: pointer;
}
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(200,164,90,0.25); }
.btn-outline {
  display: inline-block;
  background: transparent; color: var(--text-primary);
  padding: 0.9rem 2.2rem; border-radius: var(--radius);
  text-decoration: none; font-weight: 500; font-size: 0.95rem;
  border: 1px solid var(--border-strong); transition: all 0.3s;
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* ═══════ PAGE HERO (subpages) ═══════ */
.page-hero {
  padding-top: 72px;
  background: var(--bg-secondary);
  text-align: center;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
}
.page-hero-inner {
  max-width: 1200px; margin: 0 auto; padding: 4rem 2rem 0;
}
.page-hero .breadcrumb {
  font-size: 0.8rem; color: var(--text-muted); margin-bottom: 1rem;
}
.page-hero .breadcrumb a { color: var(--text-secondary); text-decoration: none; }
.page-hero .breadcrumb a:hover { color: var(--accent); }
.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem); font-weight: 900;
  margin-bottom: 0.8rem;
}
.page-hero p { color: var(--text-secondary); font-size: 1.05rem; font-weight: 300; }

/* ═══════ CATEGORY TABS ═══════ */
.category-tabs {
  display: flex; justify-content: center; gap: 1rem;
  margin-bottom: 3rem; flex-wrap: wrap;
}
.cat-tab {
  padding: 0.6rem 1.5rem; border-radius: 50px;
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-secondary); font-size: 0.85rem; font-weight: 500;
  cursor: pointer; transition: all 0.3s; text-decoration: none;
}
.cat-tab:hover, .cat-tab.active {
  border-color: var(--accent); color: var(--accent);
  background: rgba(200,164,90,0.08);
}

/* ═══════ PRODUCT DETAIL CARDS ═══════ */
.product-detail-card {
  display: grid; grid-template-columns: 1fr 1fr; gap: 3rem;
  align-items: center;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden;
  margin-bottom: 2rem; transition: border-color 0.3s;
}
.product-detail-card:hover { border-color: var(--border-strong); }
.product-detail-card:nth-child(even) { direction: rtl; }
.product-detail-card:nth-child(even) > * { direction: ltr; }
.product-detail-img {
  width: 100%; height: 300px; object-fit: cover;
}
.product-detail-body { padding: 2rem 2.5rem; }
.product-detail-num {
  font-family: 'Playfair Display', serif;
  font-size: 2.5rem; font-weight: 900; color: rgba(200,164,90,0.15);
  line-height: 1; margin-bottom: 0.5rem;
}
.product-detail-name { font-size: 1.3rem; font-weight: 700; margin-bottom: 0.8rem; }
.product-detail-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.8; }

/* ═══════ CASES PAGE ═══════ */
.cases-detail-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}
.case-detail-card {
  position: relative; border-radius: 12px; overflow: hidden;
  background: var(--bg-card); border: 1px solid var(--border);
  transition: all 0.4s; text-decoration: none; color: inherit;
}
.case-detail-card:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.case-detail-img { width: 100%; height: 260px; object-fit: cover; transition: transform 0.6s; }
.case-detail-card:hover .case-detail-img { transform: scale(1.05); }
.case-detail-img-wrap { overflow: hidden; }
.case-detail-body { padding: 1.5rem; }
.case-detail-tag {
  display: inline-block; font-size: 0.7rem; font-weight: 700;
  letter-spacing: 2px; color: var(--accent);
  background: rgba(200,164,90,0.08); border: 1px solid var(--border);
  padding: 0.2rem 0.7rem; border-radius: 50px;
  margin-bottom: 0.7rem;
}
.case-detail-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.4rem; }
.case-detail-date { font-size: 0.8rem; color: var(--text-muted); }
.case-detail-desc { font-size: 0.85rem; color: var(--text-secondary); margin-top: 0.5rem; line-height: 1.6; }

/* ═══════ FAQ ═══════ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border); border-radius: 10px;
  margin-bottom: 1rem; overflow: hidden;
  background: var(--bg-card); transition: border-color 0.3s;
}
.faq-item:hover { border-color: var(--border-strong); }
.faq-question {
  padding: 1.3rem 1.8rem; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 600; font-size: 0.95rem; user-select: none; transition: color 0.3s;
}
.faq-question:hover { color: var(--accent); }
.faq-icon {
  width: 28px; height: 28px; border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--accent);
  transition: all 0.3s; flex-shrink: 0;
}
.faq-item.active .faq-icon { background: var(--accent); color: var(--bg-primary); transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.faq-item.active .faq-answer { max-height: 400px; }
.faq-answer-inner { padding: 0 1.8rem 1.5rem; color: var(--text-secondary); font-size: 0.9rem; line-height: 1.8; }

/* ═══════ CONTACT ═══════ */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start;
}
.contact-info-list { display: flex; flex-direction: column; gap: 2rem; margin-top: 1rem; }
.contact-info-item { display: flex; gap: 1rem; align-items: flex-start; }
.contact-icon {
  width: 48px; height: 48px; border-radius: 10px;
  background: rgba(200,164,90,0.08); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: 1.2rem; flex-shrink: 0;
}
.contact-label { font-size: 0.75rem; color: var(--text-muted); letter-spacing: 1px; font-weight: 500; }
.contact-value { font-size: 0.95rem; color: var(--text-primary); margin-top: 0.2rem; }
.contact-value a { color: var(--text-primary); text-decoration: none; transition: color 0.3s; }
.contact-value a:hover { color: var(--accent); }
.contact-form {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 2.5rem;
}
.form-title { font-size: 1.3rem; font-weight: 700; margin-bottom: 0.5rem; }
.form-subtitle { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block; font-size: 0.8rem; font-weight: 500;
  color: var(--text-secondary); margin-bottom: 0.4rem;
}
.form-group input, .form-group textarea {
  width: 100%; padding: 0.8rem 1rem;
  background: var(--bg-primary); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text-primary);
  font-family: 'Noto Sans TC', sans-serif; font-size: 0.9rem;
  transition: border-color 0.3s; outline: none;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit {
  width: 100%; padding: 0.9rem;
  background: var(--accent); color: var(--bg-primary);
  border: none; border-radius: var(--radius);
  font-weight: 700; font-size: 0.95rem; letter-spacing: 1px;
  cursor: pointer; transition: all 0.3s;
  font-family: 'Noto Sans TC', sans-serif;
}
.form-submit:hover { background: var(--accent-light); }

/* ═══════ FOOTER ═══════ */
.footer {
  background: var(--bg-secondary); border-top: 1px solid var(--border);
  padding: 2.5rem 2rem; text-align: center;
}
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-text { font-size: 0.8rem; color: var(--text-muted); }
.footer-text a { color: var(--accent); text-decoration: none; }

/* ═══════ ANIMATIONS ═══════ */
@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ═══════ MOBILE ═══════ */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 72px; left: 0; right: 0;
    background: rgba(15,17,21,0.97); backdrop-filter: blur(20px);
    padding: 2rem; gap: 1.5rem;
    border-bottom: 1px solid var(--border);
  }
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .form-row { grid-template-columns: 1fr; }
  .product-detail-card { grid-template-columns: 1fr; }
  .product-detail-card:nth-child(even) { direction: ltr; }
  .product-detail-img { height: 220px; }
  .cases-detail-grid { grid-template-columns: 1fr; }
  section { padding: 4rem 1.5rem; }
}