/* ============================================
   鑫藍海創新科技 — 量子養生 · 東方智慧
   主題色系: 墨黑 + 深紫 + 量子金 + 靈性紫光
   ============================================ */

/* === CSS Variables === */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12101a;
  --bg-card: #1a1625;
  --bg-card-hover: #221d30;
  --purple-deep: #1a0a2e;
  --purple-light: #7c3aed;
  --purple-glow: rgba(124, 58, 237, 0.3);
  --gold: #d4a853;
  --gold-light: #f0d48a;
  --gold-glow: rgba(212, 168, 83, 0.3);
  --text-primary: #f0ebe0;
  --text-secondary: #a89db5;
  --text-muted: #6b6080;
  --border: rgba(124, 58, 237, 0.15);
  --border-gold: rgba(212, 168, 83, 0.2);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.15);
  --navbar-bg: rgba(10,10,15,0.85);
  --navbar-bg-scrolled: rgba(10,10,15,0.95);
  --overlay-bg: rgba(0,0,0,0.6);
  --mobile-nav-bg: rgba(10,10,15,0.98);
  --hero-overlay: linear-gradient(180deg, rgba(10,10,15,0.6) 0%, rgba(26,10,46,0.4) 50%, rgba(10,10,15,0.9) 100%);
  --img-filter: none;
  --transition: all 0.3s ease;
  --font-serif: 'Noto Serif TC', 'Times New Roman', serif;
  --font-sans: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1200px;
  --header-height: 70px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--gold); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--gold-light); }

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

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* === Particle Background === */
#particles-bg {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
  /* 用主題光暈變數（每套主題透明度足夠可見）→ 淺色主題不再整頁白，且各帶主題色光暈 */
  background: radial-gradient(ellipse 58% 52% at 18% 30%, var(--purple-glow) 0%, transparent 60%),
              radial-gradient(ellipse 52% 46% at 82% 20%, var(--gold-glow) 0%, transparent 55%),
              radial-gradient(ellipse 66% 58% at 62% 102%, var(--purple-glow) 0%, transparent 62%),
              var(--bg-primary);
}

.page-content { position: relative; z-index: 1; }

/* === Header / Navbar === */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%; height: var(--header-height);
  background: var(--navbar-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  background: var(--navbar-bg-scrolled);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

.navbar .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}

.nav-brand {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-serif);
  font-size: 1.3rem; font-weight: 700;
  color: var(--gold);
}

.nav-brand img { height: 40px; width: auto; }

.nav-links { display: flex; align-items: center; gap: 8px; list-style: none; }

.nav-links a {
  display: block; padding: 8px 16px; border-radius: 8px;
  color: var(--text-secondary); font-size: 0.95rem;
  transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
  color: var(--gold); background: rgba(212,168,83,0.08);
}

.nav-right { display: flex; align-items: center; gap: 12px; }

.btn-inquiry-cart {
  position: relative; display: flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 8px;
  background: rgba(212,168,83,0.1); border: 1px solid var(--border-gold);
  color: var(--gold); cursor: pointer; font-size: 0.9rem;
  transition: var(--transition);
}

.btn-inquiry-cart:hover { background: rgba(212,168,83,0.2); }

.cart-badge {
  position: absolute; top: -6px; right: -6px;
  background: var(--purple-light); color: #fff;
  font-size: 0.7rem; font-weight: 700;
  width: 20px; height: 20px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}

.btn-auth {
  padding: 8px 20px; border-radius: 8px;
  background: linear-gradient(135deg, var(--gold), #c4943f);
  color: var(--bg-primary); font-weight: 600; font-size: 0.9rem;
  border: none; cursor: pointer; transition: var(--transition);
}

.btn-auth:hover { transform: translateY(-1px); box-shadow: 0 4px 15px var(--gold-glow); }

/* Mobile hamburger */
.nav-toggle {
  display: none; background: none; border: none;
  color: var(--text-primary); font-size: 1.5rem; cursor: pointer;
}

/* === Hero Section === */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh; /* 手機瀏覽器工具列友善，不支援 svh 時退回上面的 vh */
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: calc(var(--header-height) + 40px) 20px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0;
  background: url('/img/hero.png') center/cover no-repeat;
  opacity: 0.9;
  filter: blur(2px) var(--img-filter, none);
}

.hero-overlay {
  position: absolute; inset: 0;
  background: var(--hero-overlay);
}

.hero-content { position: relative; z-index: 2; max-width: 800px; }

.hero-badge {
  display: inline-block;
  padding: 6px 20px; margin-bottom: 24px;
  border: 1px solid var(--border-gold);
  border-radius: 30px;
  background: rgba(212,168,83,0.08);
  color: var(--gold);
  font-size: 0.85rem; letter-spacing: 2px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--gold-light), var(--gold), var(--gold-light));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn-primary {
  padding: 14px 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), #c4943f);
  color: var(--bg-primary); font-weight: 700; font-size: 1rem;
  border: none; cursor: pointer; transition: var(--transition);
  letter-spacing: 1px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--gold-glow);
}

.btn-outline {
  padding: 14px 36px; border-radius: 10px;
  background: transparent;
  border: 1px solid var(--border-gold);
  color: var(--gold); font-weight: 600; font-size: 1rem;
  cursor: pointer; transition: var(--transition);
}

.btn-outline:hover {
  background: rgba(212,168,83,0.1);
  transform: translateY(-2px);
}

/* === Section Common === */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  color: var(--gold);
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

.section-divider {
  width: 60px; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 16px auto 0;
}

/* === Category Cards === */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.category-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
}

.category-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: var(--shadow-glow), 0 0 20px var(--gold-glow);
}

.category-card-img {
  height: 200px;
  background: var(--purple-deep);
  overflow: hidden;
}

.category-card-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
}

.category-card:hover .category-card-img img { transform: scale(1.08); }

.category-card-body { padding: 24px; }

.category-card h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem; color: var(--gold);
  margin-bottom: 8px;
}

.category-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* === Product Cards === */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: rgba(124,58,237,0.3);
  box-shadow: var(--shadow-glow);
}

.product-card-img {
  height: 220px;
  background: var(--purple-deep);
  position: relative;
  overflow: hidden;
}

.product-card-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-card-img img { transform: scale(1.05); }

.product-badge {
  position: absolute; top: 12px; left: 12px;
  padding: 4px 12px; border-radius: 20px;
  background: var(--purple-light); color: #fff;
  font-size: 0.75rem; font-weight: 600;
}

.product-card-body { padding: 20px; }

.product-card h4 {
  font-size: 1.1rem; color: var(--text-primary);
  margin-bottom: 8px;
}

.product-card .price {
  font-family: var(--font-serif);
  font-size: 1.1rem; color: var(--gold);
  margin-bottom: 12px;
}

.product-card .desc {
  color: var(--text-secondary); font-size: 0.85rem;
  margin-bottom: 16px;
  display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}

.btn-add-inquiry {
  width: 100%; padding: 10px;
  border-radius: 8px;
  background: rgba(212,168,83,0.1);
  border: 1px solid var(--border-gold);
  color: var(--gold); font-weight: 600;
  cursor: pointer; transition: var(--transition);
}

.btn-add-inquiry:hover { background: rgba(212,168,83,0.2); }

/* === Philosophy Section === */
.philosophy {
  background: linear-gradient(135deg, var(--purple-deep), var(--bg-secondary));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.philosophy-item {
  text-align: center;
  padding: 40px 24px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.philosophy-item:hover {
  background: rgba(255,255,255,0.04);
  border-color: var(--gold);
}

.philosophy-icon {
  width: 60px; height: 60px;
  margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: rgba(212,168,83,0.1);
  border: 1px solid var(--border-gold);
  font-size: 1.5rem;
}

.philosophy-item h3 {
  font-family: var(--font-serif);
  color: var(--gold); margin-bottom: 12px;
  font-size: 1.2rem;
}

.philosophy-item p { color: var(--text-secondary); font-size: 0.95rem; }

/* === Announcement Banner === */
.announcements {
  background: rgba(212,168,83,0.05);
  border-top: 1px solid var(--border-gold);
  border-bottom: 1px solid var(--border-gold);
  padding: 16px 0;
}

.announcements .container {
  display: flex; align-items: center; gap: 16px;
}

.announce-label {
  padding: 4px 12px;
  background: var(--gold);
  color: var(--bg-primary);
  border-radius: 4px;
  font-size: 0.8rem; font-weight: 700;
  white-space: nowrap;
}

.announce-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
}

/* === Footer === */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-family: var(--font-serif);
  color: var(--gold); font-size: 1.3rem;
  margin-bottom: 12px;
}

.footer-brand p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.8; }

.footer-col h4 {
  color: var(--text-primary); font-size: 0.95rem;
  margin-bottom: 16px; font-weight: 600;
}

.footer-col ul { list-style: none; }

.footer-col li { margin-bottom: 8px; }

.footer-col a { color: var(--text-secondary); font-size: 0.9rem; }
.footer-col a:hover { color: var(--gold); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}

.footer-bottom p { color: var(--text-muted); font-size: 0.85rem; }

/* === Inquiry Cart Sidebar === */
.cart-overlay {
  position: fixed; inset: 0;
  background: var(--overlay-bg);
  z-index: 2000;
  opacity: 0; visibility: hidden;
  transition: var(--transition);
}

.cart-overlay.open { opacity: 1; visibility: visible; }

.cart-sidebar {
  position: fixed; top: 0; right: -420px;
  width: 400px; max-width: 90vw;
  height: 100vh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  z-index: 2001;
  display: flex; flex-direction: column;
  transition: right 0.3s ease;
}

.cart-sidebar.open { right: 0; }

.cart-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px; border-bottom: 1px solid var(--border);
}

.cart-header h3 { font-family: var(--font-serif); color: var(--gold); }

.cart-close {
  background: none; border: none;
  color: var(--text-secondary); font-size: 1.5rem;
  cursor: pointer;
}

.cart-body {
  flex: 1; overflow-y: auto; padding: 20px;
}

.cart-item {
  display: flex; gap: 12px; padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.cart-item-img {
  width: 60px; height: 60px;
  border-radius: 8px;
  background: var(--purple-deep);
  overflow: hidden; flex-shrink: 0;
}

.cart-item-img img { width: 100%; height: 100%; object-fit: cover; }

.cart-item-info { flex: 1; }
.cart-item-info h4 { font-size: 0.95rem; margin-bottom: 4px; }
.cart-item-info p { color: var(--text-muted); font-size: 0.8rem; }

.cart-item-actions { display: flex; align-items: center; gap: 8px; margin-top: 8px; }

.qty-btn {
  width: 28px; height: 28px;
  border-radius: 6px; border: 1px solid var(--border);
  background: var(--bg-card); color: var(--text-primary);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
}

.cart-item-remove {
  background: none; border: none;
  color: #e74c3c; font-size: 0.8rem; cursor: pointer;
  margin-left: auto;
}

.cart-footer {
  padding: 20px;
  border-top: 1px solid var(--border);
}

.cart-empty {
  text-align: center; padding: 60px 20px;
  color: var(--text-muted);
}

.btn-submit-inquiry {
  width: 100%; padding: 14px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), #c4943f);
  color: var(--bg-primary); font-weight: 700; font-size: 1rem;
  border: none; cursor: pointer; transition: var(--transition);
}

.btn-submit-inquiry:hover { box-shadow: 0 4px 15px var(--gold-glow); }

/* === Modal === */
.modal-overlay {
  position: fixed; inset: 0;
  background: var(--overlay-bg);
  z-index: 3000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.open { opacity: 1; visibility: visible; }

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 480px; max-width: 90vw;
  max-height: 90vh; overflow-y: auto;
  padding: 32px;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-overlay.open .modal { transform: translateY(0); }

.modal h2 {
  font-family: var(--font-serif);
  color: var(--gold); margin-bottom: 24px;
  font-size: 1.4rem;
}

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block; margin-bottom: 6px;
  color: var(--text-secondary); font-size: 0.9rem;
}

.form-input {
  width: 100%; padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-glow);
}

.form-input::placeholder { color: var(--text-muted); }

textarea.form-input { min-height: 100px; resize: vertical; }

.form-error { color: #e74c3c; font-size: 0.8rem; margin-top: 4px; }

.modal-actions {
  display: flex; gap: 12px; margin-top: 24px;
}

.btn-cancel {
  flex: 1; padding: 12px;
  border-radius: 8px; border: 1px solid var(--border);
  background: transparent; color: var(--text-secondary);
  cursor: pointer; transition: var(--transition);
}

.btn-cancel:hover { background: var(--bg-card); }

/* === Auth Page === */
.auth-page {
  min-height: 100vh;
  min-height: 100svh; /* 手機瀏覽器工具列友善，不支援 svh 時退回上面的 vh */
  display: flex; align-items: center; justify-content: center;
  padding: calc(var(--header-height) + 40px) 20px 80px;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 440px; max-width: 100%;
}

.auth-card h1 {
  font-family: var(--font-serif);
  color: var(--gold); font-size: 1.6rem;
  text-align: center; margin-bottom: 32px;
}

.auth-switch {
  text-align: center; margin-top: 20px;
  color: var(--text-secondary); font-size: 0.9rem;
}

/* === Page Header (subpages) === */
.page-hero {
  padding: calc(var(--header-height) + 60px) 0 60px;
  text-align: center;
  background: linear-gradient(180deg, var(--purple-deep), var(--bg-primary));
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  color: var(--gold); margin-bottom: 12px;
}

.page-hero p { color: var(--text-secondary); }

.breadcrumb {
  display: flex; gap: 8px; justify-content: center;
  margin-bottom: 20px;
  font-size: 0.85rem; color: var(--text-muted);
}

.breadcrumb a { color: var(--text-secondary); }

/* === About Page === */
.about-section { padding: 60px 0; }

.about-timeline {
  position: relative;
  padding-left: 40px;
}

.about-timeline::before {
  content: '';
  position: absolute; left: 15px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), var(--purple-light), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.timeline-item::before {
  content: '';
  position: absolute; left: -33px; top: 28px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--gold);
  border: 2px solid var(--bg-primary);
}

.timeline-item h3 { color: var(--gold); margin-bottom: 8px; }
.timeline-item p { color: var(--text-secondary); }

/* === Contact Page === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info-item {
  display: flex; gap: 16px; align-items: flex-start;
  margin-bottom: 24px;
}

.contact-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(212,168,83,0.1);
  border: 1px solid var(--border-gold);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}

/* === Product Detail === */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: 60px 0;
}

.product-gallery {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.product-gallery img { width: 100%; aspect-ratio: 1; object-fit: cover; }

.product-info h1 {
  font-family: var(--font-serif);
  font-size: 2rem; color: var(--text-primary);
  margin-bottom: 12px;
}

.product-info .category-tag {
  display: inline-block;
  padding: 4px 12px; border-radius: 20px;
  background: rgba(124,58,237,0.15);
  color: var(--purple-light);
  font-size: 0.8rem; margin-bottom: 20px;
}

.product-info .price-display {
  font-family: var(--font-serif);
  font-size: 1.5rem; color: var(--gold);
  margin-bottom: 20px;
}

.product-info .description {
  color: var(--text-secondary);
  line-height: 1.9; margin-bottom: 32px;
}

/* === Toast Notifications === */
.toast-container {
  position: fixed; top: 80px; right: 20px;
  z-index: 5000;
  display: flex; flex-direction: column; gap: 8px;
}

.toast {
  padding: 14px 20px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
}

.toast.success { border-color: #2ecc71; }
.toast.error { border-color: #e74c3c; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* === Loading Spinner === */
.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 40px auto;
}

@keyframes spin { to { transform: rotate(360deg); } }

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

  .nav-links.mobile-open {
    display: flex; flex-direction: column;
    position: absolute; top: var(--header-height);
    left: 0; width: 100%;
    background: var(--mobile-nav-bg);
    border-bottom: 1px solid var(--border);
    padding: 16px;
  }

  .footer-grid { grid-template-columns: 1fr; gap: 24px; }

  .contact-grid { grid-template-columns: 1fr; }

  .product-detail { grid-template-columns: 1fr; gap: 24px; }

  .hero h1 { font-size: 2rem; }

  /* 平板兩欄，minmax(0,1fr) 防止內容撐破欄位造成水平捲動 */
  .categories-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .products-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .philosophy-grid { grid-template-columns: 1fr; }

  .footer-bottom { flex-direction: column; text-align: center; }

  /* === RWD 手機強化（觸控/間距/防溢出）=== */

  /* 導覽列防擠：縮小右側按鈕間距 */
  .nav-right { gap: 8px; }
  .nav-brand { font-size: 1.15rem; gap: 8px; }

  /* 觸控目標 ≥44px（icon 鈕另補 min-width） */
  .nav-toggle {
    min-width: 44px; min-height: 44px;
    display: flex; align-items: center; justify-content: center;
  }
  .btn-inquiry-cart, .btn-auth { min-height: 44px; }
  .btn-add-inquiry { min-height: 44px; }
  .cart-close { min-width: 44px; min-height: 44px; display: flex; align-items: center; justify-content: center; }
  .qty-btn { width: 44px; height: 44px; }
  .modal-actions .btn-cancel,
  .modal-actions .btn-primary { min-height: 44px; }

  /* 手機選單：每項 ≥44px、滿版、間距舒適 */
  .nav-links.mobile-open a {
    display: flex; align-items: center;
    min-height: 44px; width: 100%;
    padding: 12px 16px;
  }

  /* 公告跑馬燈：改為換行可讀，容器允許換行 */
  .announcements .container { flex-wrap: wrap; }
  .announce-text {
    white-space: normal; overflow: visible; text-overflow: clip;
  }

  /* 間距縮小：桌機 100px section padding → 手機 56px */
  .section { padding: 56px 0; }
  .section-header { margin-bottom: 40px; }
  .hero { padding: calc(var(--header-height) + 24px) 20px 48px; }

  /* 表單：手機 16px 防 iOS 自動放大 + 觸控高度 */
  .form-input { font-size: 16px; min-height: 44px; }

  /* Toast 不溢出螢幕 */
  .toast-container { left: 12px; right: 12px; }
  .toast { width: auto; max-width: 100%; }
}

@media (max-width: 480px) {
  .categories-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary,
  .hero-actions .btn-outline { width: 100%; }

  /* 小螢幕防擠：詢價單/登入 只留 icon，隱藏文字（保留 HTML 文字節點） */
  .btn-inquiry-cart .btn-label,
  .btn-auth .btn-label { display: none; }
  .btn-inquiry-cart, .btn-auth { padding: 8px; min-width: 44px; justify-content: center; }

  /* 極窄螢幕(~320px)品牌防擠：略縮字級與圖示 */
  .nav-brand { font-size: 1.02rem; }
  .nav-brand i { font-size: 1.3rem !important; }

  /* 間距再縮 */
  .section { padding: 40px 0; }

  /* Modal：內距與高度縮小，dvh 友善（不支援時退回 vh） */
  .modal {
    padding: 20px;
    max-height: 90vh;
    max-height: 90dvh;
  }
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--purple-deep); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--purple-light); }

/* === Selection === */
::selection { background: var(--gold); color: var(--bg-primary); }

/* === Themed Image Filter === */
.themed-img { filter: var(--img-filter, none); transition: filter .3s ease; }

/* ============================================
   佈景主題切換器 + 切換過渡（量子風：優雅漸變 + 金紫微光）
   ============================================ */
/* 切換瞬間全站色彩 crossfade（僅切換 ~0.78s 期間啟用 .theme-anim） */
html.theme-anim * {
  transition: background-color .6s ease, color .6s ease, border-color .6s ease,
              box-shadow .6s ease, fill .6s ease, opacity .6s ease !important;
}
.hero-bg { transition: opacity .6s ease, filter .5s ease; }

/* 金紫微光掃過 */
.theme-glow {
  position: fixed; inset: 0; z-index: 1400; pointer-events: none; opacity: 0; mix-blend-mode: screen;
  background:
    radial-gradient(circle at 50% 42%, rgba(212,168,83,0.34), transparent 55%),
    radial-gradient(circle at 32% 68%, rgba(124,58,237,0.30), transparent 55%),
    radial-gradient(circle at 72% 66%, rgba(240,212,138,0.22), transparent 52%);
}
.theme-glow.active { animation: themeGlowPulse .78s ease; }
@keyframes themeGlowPulse { 0% { opacity: 0; } 42% { opacity: 1; } 100% { opacity: 0; } }

/* 載入時整頁柔和淡入 */
@keyframes pageThemeFadeIn { from { opacity: 0; } to { opacity: 1; } }
body { animation: pageThemeFadeIn .5s ease both; }

/* 浮動切換鈕 */
.theme-switcher { position: fixed; right: 22px; bottom: 22px; z-index: 1500; }
.theme-switcher-btn {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--bg-card); border: 1px solid var(--border-gold); color: var(--gold);
  font-size: 1.35rem; cursor: pointer; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 18px var(--gold-glow), var(--shadow);
  transition: transform .4s ease, box-shadow .3s ease, color .3s ease, background .6s ease, border-color .6s ease;
}
.theme-switcher-btn:hover { transform: rotate(90deg) scale(1.06); box-shadow: 0 0 28px var(--gold-glow), 0 0 42px var(--purple-glow); }

/* 主題選單面板 */
.theme-switcher-panel {
  position: absolute; right: 0; bottom: 64px; width: 216px;
  background: var(--bg-card); border: 1px solid var(--border-gold); border-radius: var(--radius-lg);
  box-shadow: var(--shadow), 0 0 30px var(--purple-glow); padding: 14px; backdrop-filter: blur(14px);
  opacity: 0; transform: translateY(12px) scale(.96); transform-origin: bottom right; pointer-events: none;
  transition: opacity .3s ease, transform .3s ease;
}
.theme-switcher.open .theme-switcher-panel { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.theme-switcher-title { font-family: var(--font-serif); color: var(--text-primary); font-size: .95rem; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.theme-switcher-title i { color: var(--gold); }
.theme-opt {
  display: flex; align-items: center; gap: 11px; width: 100%; padding: 9px 10px; text-align: left;
  border: none; background: transparent; border-radius: 10px; cursor: pointer; margin-bottom: 3px; transition: background .2s ease;
}
.theme-opt:hover { background: var(--bg-card-hover); }
.theme-opt.active { background: var(--bg-card-hover); box-shadow: inset 0 0 0 1px var(--border-gold); }
.theme-opt-swatches { display: flex; flex: 0 0 auto; }
.theme-opt-swatches span { width: 17px; height: 17px; border-radius: 50%; margin-left: -6px; border: 2px solid var(--bg-card); box-shadow: 0 1px 3px rgba(0,0,0,.15); }
.theme-opt-swatches span:first-child { margin-left: 0; }
.theme-opt-name { color: var(--text-secondary); font-size: .88rem; }
.theme-opt.active .theme-opt-name { color: var(--text-primary); font-weight: 500; }

@media (max-width: 480px) {
  .theme-switcher { right: 14px; bottom: 14px; }
  .theme-switcher-btn { width: 46px; height: 46px; font-size: 1.2rem; }
  .theme-switcher-panel { width: 190px; }
}
@media (prefers-reduced-motion: reduce) {
  html.theme-anim *, .theme-glow.active, body { animation: none !important; transition: none !important; }
}