/* ============================================
   道韵阁 DaoYunGe - 主样式表
   Taoist-themed E-commerce CSS
   道教文化视觉升级版
   ============================================ */

/* === CSS Variables === */
:root {
  --bg-primary: #12090a;
  --bg-secondary: #1c1012;
  --bg-card: #221418;
  --bg-card-hover: #2c1a20;
  --text-primary: #f0e6d6;
  --text-secondary: #c8b8a0;
  --text-muted: #8a7a6a;
  --gold: #d4a847;
  --gold-light: #ecd070;
  --gold-dark: #96701e;
  --red: #b83838;
  --red-light: #d84848;
  --red-dark: #6a1818;
  --vermilion: #c23a28;
  --border: rgba(200, 164, 92, 0.18);
  --border-strong: rgba(200, 164, 92, 0.38);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-gold: 0 4px 30px rgba(200, 164, 92, 0.2);
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-cn: "Noto Serif SC", "Source Han Serif SC", "SimSun", "STSong", serif;
  --font-en: "Cormorant Garamond", "Playfair Display", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

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;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  /* 暖色云纹纹理背景 */
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(180, 80, 40, 0.07) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(200, 164, 92, 0.05) 0%, transparent 40%),
    radial-gradient(ellipse at 50% 80%, rgba(140, 40, 30, 0.06) 0%, transparent 50%),
    url("data:image/svg+xml,%3Csvg width='200' height='200' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 100 Q50 70 70 100 Q90 130 110 100 Q130 70 150 100 Q170 130 190 100' stroke='rgba(200,164,92,0.03)' fill='none' stroke-width='1'/%3E%3Cpath d='M0 140 Q20 110 40 140 Q60 170 80 140 Q100 110 120 140 Q140 170 160 140 Q180 110 200 140' stroke='rgba(200,164,92,0.02)' fill='none' stroke-width='1'/%3E%3C/svg%3E");
  background-color: var(--bg-primary);
}

a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
img { max-width: 100%; display: block; }
input { font-family: inherit; }

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--gold-dark); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold); }

/* === Navbar === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 2rem;
  transition: all var(--transition);
  background: transparent;
}
.navbar.scrolled {
  background: rgba(28, 16, 18, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(180, 80, 40, 0.1);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-cn);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.15em;
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-logo-icon {
  font-size: 1.4rem;
  opacity: 0.9;
}
.nav-logo:hover { color: var(--gold-light); }
.nav-links {
  display: flex;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  position: relative;
  padding: 4px 0;
  transition: color var(--transition);
}
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Language Switcher */
.lang-switcher { position: relative; }
.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: all var(--transition);
}
.lang-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}
.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 160px;
  padding: 6px;
  display: none;
  flex-direction: column;
  gap: 2px;
  box-shadow: var(--shadow);
  z-index: 100;
}
.lang-dropdown.show { display: flex; }
.lang-dropdown button {
  padding: 8px 12px;
  text-align: left;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-radius: 4px;
  transition: all var(--transition);
}
.lang-dropdown button:hover,
.lang-dropdown button.active {
  background: rgba(200, 164, 92, 0.15);
  color: var(--gold);
}

/* Cart Button */
.cart-btn {
  position: relative;
  padding: 6px 10px;
  font-size: 1.3rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.cart-btn:hover { color: var(--gold); }
.cart-count {
  position: absolute;
  top: 0;
  right: -2px;
  background: var(--red);
  color: white;
  font-size: 0.7rem;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

/* Menu Toggle (Mobile) */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-secondary);
  transition: all var(--transition);
}

/* ============================================
   Hero — 道教氛围大改
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 50% 40%, rgba(200, 164, 92, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 30%, rgba(180, 60, 40, 0.10) 0%, transparent 50%),
    radial-gradient(ellipse at 30% 70%, rgba(140, 40, 30, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, #1a0e0a 0%, #12090a 50%, #0e0808 100%);
}

/* 八卦底纹 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    url("data:image/svg+xml,%3Csvg width='400' height='400' xmlns='http://www.w3.org/2000/svg'%3E%3C!-- 八卦: 乾 ☰ --%3E%3Cg transform='translate(200,200)'%3E%3Ccircle r='180' fill='none' stroke='rgba(200,164,92,0.06)' stroke-width='1'/%3E%3Ccircle r='120' fill='none' stroke='rgba(200,164,92,0.04)' stroke-width='1'/%3E%3Ccircle r='60' fill='none' stroke='rgba(200,164,92,0.03)' stroke-width='1'/%3E%3C!-- 八条卦线 --%3E%3Cline x1='0' y1='-180' x2='0' y2='-120' stroke='rgba(200,164,92,0.05)' stroke-width='2'/%3E%3Cline x1='127' y1='-127' x2='85' y2='-85' stroke='rgba(200,164,92,0.05)' stroke-width='2'/%3E%3Cline x1='180' y1='0' x2='120' y2='0' stroke='rgba(200,164,92,0.05)' stroke-width='2'/%3E%3Cline x1='127' y1='127' x2='85' y2='85' stroke='rgba(200,164,92,0.05)' stroke-width='2'/%3E%3Cline x1='0' y1='180' x2='0' y2='120' stroke='rgba(200,164,92,0.05)' stroke-width='2'/%3E%3Cline x1='-127' y1='127' x2='-85' y2='85' stroke='rgba(200,164,92,0.05)' stroke-width='2'/%3E%3Cline x1='-180' y1='0' x2='-120' y2='0' stroke='rgba(200,164,92,0.05)' stroke-width='2'/%3E%3Cline x1='-127' y1='-127' x2='-85' y2='-85' stroke='rgba(200,164,92,0.05)' stroke-width='2'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 600px 600px;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.8;
  animation: baguaRotate 120s linear infinite;
}

@keyframes baguaRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 底部渐变过渡 */
.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg-primary), transparent);
  pointer-events: none;
  z-index: 1;
}

/* 灵气粒子动画容器 */
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}
.hero-particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--gold);
  border-radius: 50%;
  opacity: 0;
  animation: spiritFloat linear infinite;
}
.hero-particle:nth-child(1) { left: 10%; animation-duration: 8s; animation-delay: 0s; }
.hero-particle:nth-child(2) { left: 20%; animation-duration: 10s; animation-delay: 1s; }
.hero-particle:nth-child(3) { left: 35%; animation-duration: 7s; animation-delay: 2s; }
.hero-particle:nth-child(4) { left: 50%; animation-duration: 9s; animation-delay: 0.5s; }
.hero-particle:nth-child(5) { left: 65%; animation-duration: 11s; animation-delay: 3s; }
.hero-particle:nth-child(6) { left: 75%; animation-duration: 8s; animation-delay: 1.5s; }
.hero-particle:nth-child(7) { left: 85%; animation-duration: 10s; animation-delay: 2.5s; }
.hero-particle:nth-child(8) { left: 45%; animation-duration: 12s; animation-delay: 4s; }
.hero-particle:nth-child(9) { left: 55%; animation-duration: 9s; animation-delay: 0.8s; }
.hero-particle:nth-child(10) { left: 30%; animation-duration: 7.5s; animation-delay: 3.5s; }
.hero-particle:nth-child(11) { left: 90%; animation-duration: 8.5s; animation-delay: 1.2s; }
.hero-particle:nth-child(12) { left: 5%; animation-duration: 10.5s; animation-delay: 2.2s; }

@keyframes spiritFloat {
  0% { bottom: -10px; opacity: 0; transform: translateX(0); }
  10% { opacity: 0.6; }
  50% { opacity: 0.3; transform: translateX(30px); }
  90% { opacity: 0.5; }
  100% { bottom: 100%; opacity: 0; transform: translateX(-20px); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  /* 云纹装饰 */
  background-image:
    url("data:image/svg+xml,%3Csvg width='300' height='100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M20 50 Q30 30 50 40 Q60 20 80 35 Q100 15 120 40 Q130 25 150 35 Q170 20 180 40 Q200 30 220 45 Q240 25 260 40 Q280 30 300 50' stroke='rgba(200,164,92,0.04)' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-size: 400px 150px;
  background-position: center bottom 10%;
  opacity: 0.6;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: 2rem;
  animation: fadeInUp 1s ease;
}

/* Hero 大太极 */
.hero-taiji {
  margin: 0 auto 1.5rem;
  width: 120px;
  height: 120px;
  animation: yinyangSpin 20s linear infinite;
  filter: drop-shadow(0 0 20px rgba(200, 164, 92, 0.3));
}
.hero-taiji svg {
  width: 100%;
  height: 100%;
}

.hero-badge {
  display: inline-block;
  padding: 6px 20px;
  border: 1px solid var(--border-strong);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--gold);
  letter-spacing: 0.2em;
  margin-bottom: 1.5rem;
  font-family: var(--font-cn);
  background: rgba(200, 164, 92, 0.05);
}
.hero-title {
  font-family: var(--font-cn);
  font-size: clamp(3.2rem, 9vw, 5.5rem);
  font-weight: 900;
  color: var(--gold);
  letter-spacing: 0.35em;
  margin-bottom: 1rem;
  text-shadow: 0 0 60px rgba(200, 164, 92, 0.25), 0 0 120px rgba(180, 60, 40, 0.1);
}
.hero-subtitle {
  font-family: var(--font-cn);
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--text-secondary);
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}
.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}
.hero-btn {
  display: inline-block;
  padding: 14px 40px;
  background: linear-gradient(135deg, var(--vermilion), var(--red));
  color: #f0e6d6;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.1em;
  border-radius: 50px;
  transition: all var(--transition);
  font-family: var(--font-cn);
  box-shadow: 0 4px 20px rgba(194, 58, 40, 0.3);
}
.hero-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(194, 58, 40, 0.4);
  background: linear-gradient(135deg, var(--red), var(--red-light));
}
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  animation: bounce 2s infinite;
  z-index: 2;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================
   Section 分隔装饰 — 道教云纹线
   ============================================ */
.dao-divider {
  text-align: center;
  padding: 1rem 0;
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
}
.dao-divider::before {
  content: "";
  display: block;
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dark), transparent);
  margin: 0 auto 0.5rem;
}
.dao-divider-symbol {
  font-size: 1.2rem;
  color: var(--gold-dark);
  opacity: 0.6;
  letter-spacing: 1em;
}
.dao-divider::after {
  content: "";
  display: block;
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dark), transparent);
  margin: 0.5rem auto 0;
}

/* === Section === */
.products-section, .about-section, .contact-section {
  padding: 6rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
}
.section-header {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}
.section-title {
  font-family: var(--font-cn);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  color: var(--gold);
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
  position: relative;
  display: inline-block;
}
/* 标题两侧小八卦装饰 */
.section-title::before,
.section-title::after {
  content: "☰";
  font-size: 0.8em;
  color: var(--gold-dark);
  opacity: 0.5;
  margin: 0 0.5em;
  vertical-align: middle;
}
.section-subtitle {
  font-family: var(--font-cn);
  color: var(--text-muted);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
}

/* === Category Filters === */
.category-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3rem;
}
.cat-btn {
  padding: 8px 24px;
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: all var(--transition);
}
.cat-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}
.cat-btn.active {
  background: rgba(200, 164, 92, 0.15);
  border-color: var(--gold);
  color: var(--gold);
}

/* === Product Grid === */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.5rem;
}
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  cursor: pointer;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(200, 164, 92, 0.15), 0 0 0 1px var(--border-strong);
  border-color: var(--border-strong);
}
.product-image {
  position: relative;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-card));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  overflow: hidden;
}
.product-image .product-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem; color: var(--gold-dark); opacity: 0.5;
  transition: transform var(--transition);
}
.product-card:hover .product-placeholder {
  transform: scale(1.1);
}
.product-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  background: rgba(26, 14, 10, 0.85);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.7rem;
  color: var(--gold);
  letter-spacing: 0.05em;
}
.product-body {
  padding: 1.25rem;
}
.product-name {
  font-family: var(--font-cn);
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.product-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 0.75rem;
}
.product-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.6;
}
.product-view-btn {
  margin-top: 0.75rem;
  padding: 6px 16px;
  background: rgba(200, 164, 92, 0.1);
  border: 1px solid rgba(200, 164, 92, 0.3);
  border-radius: var(--radius);
  color: var(--gold);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition);
  width: 100%;
}
.product-view-btn:hover {
  background: rgba(200, 164, 92, 0.25);
  border-color: var(--gold);
}

/* === About === */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.about-text h2 {
  font-family: var(--font-cn);
  font-size: 2rem;
  color: var(--gold);
  margin-bottom: 1.5rem;
  letter-spacing: 0.1em;
}
.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.9;
}
.about-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
@media (max-width: 900px) {
  .about-features { grid-template-columns: repeat(2, 1fr); }
}
.feature {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.feature:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-gold);
  background: var(--bg-card-hover);
}
.feature-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 0.75rem;
}
.feature h4 {
  font-family: var(--font-cn);
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}
.feature p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0;
}
.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.yinyang {
  animation: yinyangSpin 20s linear infinite;
  filter: drop-shadow(0 0 30px rgba(200, 164, 92, 0.3));
}
@keyframes yinyangSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* === Contact === */
.contact-section {
  text-align: center;
}
.contact-section h2 {
  font-family: var(--font-cn);
  font-size: 2rem;
  color: var(--gold);
  margin-bottom: 0.75rem;
  letter-spacing: 0.1em;
}
.contact-section > p {
  color: var(--text-muted);
  margin-bottom: 2rem;
}
.contact-info {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.contact-item:hover {
  border-color: var(--border-strong);
  box-shadow: 0 0 15px rgba(200, 164, 92, 0.1);
}
.contact-icon { font-size: 1.3rem; }

/* === Footer === */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 3rem 2rem 1.5rem;
  position: relative;
}
/* Footer 顶部云纹装饰 */
.footer::before {
  content: "☰ ☷ ☲ ☵ ☳ ☱ ☶ ☴";
  display: block;
  text-align: center;
  color: var(--gold-dark);
  opacity: 0.3;
  font-size: 1rem;
  letter-spacing: 0.8em;
  margin-bottom: 2rem;
}
.footer-content {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-brand h3 {
  font-family: var(--font-cn);
  color: var(--gold);
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}
.footer-brand p { color: var(--text-muted); font-size: 0.85rem; }
.footer-links h4, .footer-social h4 {
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--gold); }
.social-icons {
  display: flex;
  gap: 0.75rem;
  font-size: 1.5rem;
}
.social-icons a { opacity: 0.6; transition: opacity var(--transition); }
.social-icons a:hover { opacity: 1; filter: drop-shadow(0 0 8px rgba(200,164,92,0.5)); }

/* === Shipping Section === */
.shipping-section {
  padding: 6rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
}
.shipping-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}
.shipping-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition);
}
.shipping-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-gold);
}
.shipping-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}
.shipping-card h3 {
  font-family: var(--font-cn);
  color: var(--gold);
  font-size: 1rem;
  margin-bottom: 0.5rem;
}
.shipping-card p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 0;
}
.shipping-cost {
  font-size: 1.3rem !important;
  font-weight: 700;
  color: var(--gold) !important;
}

/* === Reviews Section === */
.reviews-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.reviews-section h3 {
  font-family: var(--font-cn);
  color: var(--gold);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}
.review-stats {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.review-avg {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold);
}
.review-stars {
  color: var(--gold);
  font-size: 1.2rem;
}
.review-count {
  color: var(--text-muted);
  font-size: 0.85rem;
}
.review-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.review-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}
.review-item-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
}
.review-item-stars {
  color: var(--gold);
  font-size: 0.85rem;
}
.review-item-comment {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}
.review-item-date {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: 0.25rem;
}
.review-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.review-form input, .review-form textarea {
  padding: 10px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.9rem;
}
.review-form textarea { min-height: 80px; resize: vertical; }
.star-selector {
  display: flex;
  gap: 4px;
  font-size: 1.5rem;
  cursor: pointer;
}
.star-selector span {
  color: var(--text-muted);
  transition: color var(--transition);
}
.star-selector span.active { color: var(--gold); }
.review-submit-btn {
  padding: 10px;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: var(--bg-primary);
  font-weight: 600;
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.review-submit-btn:hover { background: linear-gradient(135deg, var(--gold), var(--gold-light)); }

/* Cart checkout card button */
.cart-checkout-card {
  width: 100%;
  padding: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  transition: all var(--transition);
  letter-spacing: 0.05em;
  border: none;
}
.cart-checkout-card:hover { opacity: 0.9; }

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer-bottom p { color: var(--text-muted); font-size: 0.8rem; }

/* === Modal === */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  padding: 2rem;
}
.modal-overlay.show { display: flex; }
.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: modalIn 0.3s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.5rem;
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  z-index: 1;
}
.modal-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}
.modal-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.modal-image {
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--bg-primary), var(--bg-card));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
}
.modal-info {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.modal-category {
  font-size: 0.8rem;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.modal-name {
  font-family: var(--font-cn);
  font-size: 1.5rem;
  color: var(--text-primary);
}
.modal-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold);
}
.modal-desc { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }
.modal-details { color: var(--text-muted); font-size: 0.85rem; line-height: 1.6; }

.modal-quantity {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: fit-content;
  overflow: hidden;
}
.qty-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition);
}
.qty-btn:hover { background: rgba(200, 164, 92, 0.1); color: var(--gold); }
.modal-quantity input {
  width: 50px;
  height: 40px;
  text-align: center;
  background: transparent;
  border: none;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 0.95rem;
  -moz-appearance: textfield;
}
.modal-quantity input::-webkit-inner-spin-button,
.modal-quantity input::-webkit-outer-spin-button { -webkit-appearance: none; }

.modal-add-cart {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--vermilion), var(--red));
  color: #f0e6d6;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  transition: all var(--transition);
  letter-spacing: 0.05em;
}
.modal-add-cart:hover {
  background: linear-gradient(135deg, var(--red), var(--red-light));
}

/* === Cart Sidebar === */
.cart-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1500;
  background: rgba(0, 0, 0, 0.5);
}
.cart-overlay.show { display: block; }
.cart-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: 400px;
  max-width: 90vw;
  height: 100vh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  z-index: 1600;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition);
}
.cart-sidebar.show { transform: translateX(0); }
.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem;
  border-bottom: 1px solid var(--border);
}
.cart-header h3 {
  font-family: var(--font-cn);
  color: var(--gold);
  font-size: 1.2rem;
}
.cart-close {
  font-size: 1.5rem;
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.cart-close:hover { background: rgba(255, 255, 255, 0.1); color: var(--text-primary); }
.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
}
.cart-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 3rem 0;
}
.cart-item {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  align-items: center;
}
.cart-item-image {
  width: 60px;
  height: 60px;
  background: var(--bg-card);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}
.cart-item-image img {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}
.cart-item-placeholder {
  font-size: 1.5rem; color: var(--gold-dark); opacity: 0.5;
}
.cart-item-info { flex: 1; min-width: 0; }
.cart-item-name {
  font-size: 0.9rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cart-item-price { font-size: 0.85rem; color: var(--gold); font-weight: 600; }
.cart-item-qty {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.25rem;
}
.cart-item-qty button {
  width: 24px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  transition: all var(--transition);
}
.cart-item-qty button:hover { border-color: var(--gold); color: var(--gold); }
.cart-item-qty span { font-size: 0.85rem; color: var(--text-secondary); min-width: 20px; text-align: center; }
.cart-item-remove {
  color: var(--text-muted);
  font-size: 1.2rem;
  transition: color var(--transition);
}
.cart-item-remove:hover { color: var(--red-light); }

.cart-footer {
  padding: 1.25rem;
  border-top: 1px solid var(--border);
}
.cart-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 1rem;
}
.cart-total-price { font-size: 1.3rem; font-weight: 700; color: var(--gold); }
.cart-checkout {
  width: 100%;
  padding: 12px;
  background: var(--vermilion);
  color: white;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  transition: all var(--transition);
  letter-spacing: 0.05em;
}
.cart-checkout:hover { background: var(--red-light); }
.cart-checkout:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================
   USDT-TRC20 Payment Modal
   ============================================ */
.payment-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2500;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.payment-overlay.show { display: flex; }

.payment-modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: paymentIn 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(200, 164, 92, 0.1);
}
@keyframes paymentIn {
  from { opacity: 0; transform: scale(0.92) translateY(30px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.payment-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
  z-index: 1;
}
.payment-header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.payment-network-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: rgba(200, 164, 92, 0.15);
  border: 1px solid var(--gold);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.05em;
  font-family: monospace;
}
.payment-header h3 {
  font-family: var(--font-cn);
  font-size: 1.15rem;
  color: var(--text-primary);
}
.payment-close {
  font-size: 1.5rem;
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.payment-close:hover { background: rgba(255, 255, 255, 0.1); color: var(--text-primary); }

.payment-body {
  padding: 1.5rem;
}

/* Payment Section */
.payment-section { margin-bottom: 1.25rem; }
.payment-section-title {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

/* Order Summary Items */
.payment-summary { display: flex; flex-direction: column; gap: 0.5rem; }
.payment-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.payment-item-name {
  flex: 1;
  font-size: 0.9rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.payment-item-qty {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.payment-item-price {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gold);
  white-space: nowrap;
}

.payment-divider {
  height: 1px;
  background: var(--border);
  margin: 1.25rem 0;
}

/* USDT Amount */
.payment-usdt-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: linear-gradient(135deg, rgba(200, 164, 92, 0.1), rgba(200, 164, 92, 0.05));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
}
.payment-usdt-main {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}
.payment-usdt-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold-light);
  font-family: monospace;
  letter-spacing: 0.02em;
}
.payment-usdt-unit {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 0.05em;
}

/* Copy Button */
.payment-copy-btn {
  padding: 8px 16px;
  background: rgba(200, 164, 92, 0.15);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--gold);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.payment-copy-btn:hover {
  background: rgba(200, 164, 92, 0.25);
}
.payment-copy-btn.copied {
  background: rgba(200, 164, 92, 0.3);
  border-color: var(--gold);
  color: var(--gold-light);
}

/* QR Code Section */
.payment-qr-section {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin: 1.5rem 0;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.payment-qr-code {
  width: 120px;
  height: 120px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--border-strong);
  flex-shrink: 0;
}
.payment-qr-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}
.payment-qr-icon {
  font-size: 2.5rem;
  color: var(--gold);
  opacity: 0.3;
}
.qr-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.payment-qr-info {
  flex: 1;
  min-width: 0;
}
.payment-qr-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}
.payment-qr-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Address Section */
.payment-address-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.payment-address-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  white-space: nowrap;
}
.payment-address-box {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.payment-address-box code {
  flex: 1;
  font-family: monospace;
  font-size: 0.8rem;
  color: var(--text-secondary);
  word-break: break-all;
  user-select: all;
}
.payment-copy-btn-sm {
  padding: 4px 10px;
  background: rgba(200, 164, 92, 0.15);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--gold);
  font-size: 0.75rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.payment-copy-btn-sm:hover { background: rgba(200, 164, 92, 0.25); }
.payment-copy-btn-sm.copied {
  background: rgba(200, 164, 92, 0.3);
  color: var(--gold-light);
}

/* Warning */
.payment-warning {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: rgba(160, 48, 48, 0.1);
  border: 1px solid rgba(160, 48, 48, 0.3);
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
}
.payment-warning-icon {
  font-size: 1rem;
  flex-shrink: 0;
  line-height: 1.4;
}
.payment-warning span:last-child {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Confirm Button */
.payment-confirm-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: var(--bg-primary);
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius);
  transition: all var(--transition);
  letter-spacing: 0.05em;
  box-shadow: 0 4px 20px rgba(200, 164, 92, 0.25);
}
.payment-confirm-btn:hover {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  transform: translateY(-1px);
  box-shadow: 0 6px 28px rgba(200, 164, 92, 0.35);
}
.payment-confirm-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Rate Note */
.payment-rate-note {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

/* ============================================
   Payment Success State
   ============================================ */
.payment-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1rem 0;
}
.payment-success-icon {
  margin-bottom: 1.5rem;
}
.payment-success-icon svg path:last-child {
  stroke-dasharray: 100;
  animation: checkDraw 0.5s ease forwards;
}
@keyframes checkDraw {
  from { stroke-dashoffset: 100; }
  to { stroke-dashoffset: 0; }
}
.payment-success-title {
  font-family: var(--font-cn);
  font-size: 1.5rem;
  color: var(--gold);
  margin-bottom: 0.5rem;
}
.payment-success-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}
.payment-order-box {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  width: 100%;
  max-width: 320px;
}
.payment-order-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.payment-order-value {
  font-family: monospace;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--gold-light);
  letter-spacing: 0.05em;
}
.payment-order-detail {
  width: 100%;
  max-width: 320px;
  margin-bottom: 1.5rem;
}
.payment-order-detail p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}
.payment-note {
  font-size: 0.8rem !important;
  color: var(--text-muted) !important;
  margin-top: 0.5rem !important;
}
.payment-done-btn {
  padding: 12px 40px;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: var(--bg-primary);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  transition: all var(--transition);
}
.payment-done-btn:hover {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
}

/* Success page extras */
.payment-success-actions {
  width: 100%;
  max-width: 320px;
  margin-bottom: 1rem;
}
.payment-copy-order-btn {
  width: 100%;
  padding: 10px;
  background: rgba(200, 164, 92, 0.12);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--gold);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
  margin-bottom: 0.5rem;
}
.payment-copy-order-btn:hover { background: rgba(200, 164, 92, 0.25); }
.payment-copy-order-btn.copied {
  background: rgba(200, 164, 92, 0.3);
  color: var(--gold-light);
}
.payment-hint {
  font-size: 0.75rem !important;
  color: var(--text-muted) !important;
}
.payment-addr-small {
  font-family: monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
  word-break: break-all;
}
.payment-notify-ok {
  font-size: 0.85rem !important;
  color: #7cb87c !important;
  margin-top: 0.5rem !important;
}
.payment-notify-warn {
  font-size: 0.85rem !important;
  color: #c8a45c !important;
  margin-top: 0.5rem !important;
}
.payment-contact-box {
  width: 100%;
  max-width: 320px;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
}
.payment-contact-title {
  font-size: 0.8rem !important;
  color: var(--text-muted) !important;
  margin-bottom: 0.25rem !important;
}
.payment-contact-info {
  font-size: 0.9rem !important;
  color: var(--text-secondary) !important;
}

/* === Toast === */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 12px 28px;
  background: var(--bg-card);
  border: 1px solid var(--gold);
  border-radius: 50px;
  color: var(--gold);
  font-size: 0.9rem;
  z-index: 3000;
  opacity: 0;
  transition: all var(--transition);
  pointer-events: none;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* === Responsive === */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.show {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    padding: 1rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }
  .menu-toggle { display: flex; }
  
  .hero { min-height: 500px; }
  .hero-title { font-size: 2.5rem; }
  .hero-taiji { width: 80px; height: 80px; }
  
  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .about-features { grid-template-columns: 1fr; }
  .about-visual { order: -1; }
  .yinyang svg { width: 150px; height: 150px; }
  
  .modal-body { grid-template-columns: 1fr; }
  .modal-image { aspect-ratio: 16/9; font-size: 4rem; }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-links { align-items: center; }
  .social-icons { justify-center; }
  
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.75rem;
  }
  .product-body { padding: 0.75rem; }
  .product-name { font-size: 0.9rem; }
  .product-price { font-size: 0.95rem; }
  
  /* Section title八卦隐藏 */
  .section-title::before, .section-title::after { display: none; }

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

  /* Payment Modal - Mobile */
  .payment-overlay { padding: 0.75rem; align-items: flex-start; }
  .payment-modal {
    max-width: 100%;
    margin-top: 10vh;
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius) var(--radius);
  }
  .payment-qr-section {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .payment-qr-info { text-align: center; }
  .payment-usdt-box {
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }
  .payment-usdt-value { font-size: 1.6rem; }
  .payment-header { padding: 1rem; }
  .payment-body { padding: 1rem; }
  .payment-item {
    flex-wrap: wrap;
  }
  .payment-item-price { margin-left: auto; }
}

@media (max-width: 480px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  .hero { min-height: 400px; }
  .nav-logo { font-size: 1.2rem; }
  .payment-qr-code { width: 100px; height: 100px; }
  .shipping-grid { grid-template-columns: 1fr; }
}