/* ============================================================
   Rainbow HiBi — 全局设计系统
   包含：CSS 变量、Reset、排版、按钮、卡片、导航、Footer、动画
   ============================================================ */

/* ── Google Fonts 导入 ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,500&display=swap');

/* ── 设计令牌 (Design Tokens) ── */
:root {
  /* 品牌色 */
  --color-primary: #1B5E20;
  --color-primary-light: #2E7D32;
  --color-primary-dark: #0D3B13;
  --color-primary-alpha: rgba(27, 94, 32, 0.1);

  /* 强调色 */
  --color-accent: #D4A853;
  --color-accent-light: #E8C97A;
  --color-accent-dark: #B8892E;

  /* 背景色 */
  --color-hero-bg: #F5E6D3;
  --color-bg: #FFF8F0;
  --color-bg-alt: #FDF5EB;
  --color-bg-white: #FFFFFF;

  /* 文字色 */
  --color-text: #3E2723;
  --color-text-light: #6D4C41;
  --color-text-muted: #8D6E63;
  --color-text-white: #FFFFFF;
  --color-text-on-primary: #FFFFFF;

  /* 口味色 */
  --color-strawberry: #E53935;
  --color-blueberry: #1565C0;
  --color-raspberry: #AD1457;
  --color-blackberry: #4A148C;

  /* 功能色 */
  --color-success: #43A047;
  --color-warning: #FB8C00;
  --color-error: #E53935;
  --color-info: #1E88E5;

  /* 边框 & 阴影 */
  --color-border: #E8DDD0;
  --color-border-light: #F0E8DE;
  --shadow-sm: 0 2px 8px rgba(62, 39, 35, 0.06);
  --shadow-md: 0 4px 20px rgba(62, 39, 35, 0.08);
  --shadow-lg: 0 8px 40px rgba(62, 39, 35, 0.12);
  --shadow-xl: 0 16px 64px rgba(62, 39, 35, 0.16);
  --shadow-glow: 0 0 30px rgba(27, 94, 32, 0.15);

  /* 字体 */
  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* 字号 */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.5rem;
  --text-4xl: 3.25rem;
  --text-5xl: 4rem;
  --text-6xl: 5rem;

  /* 行高 */
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* 间距 */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-2xl: 40px;
  --radius-full: 50%;
  --radius-pill: 9999px;

  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* 布局 */
  --max-width: 1200px;
  --max-width-wide: 1400px;
  --max-width-narrow: 800px;
  --nav-height: 72px;
  --announcement-height: 40px;
}


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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--leading-tight);
  color: var(--color-text);
}


/* ── 布局 ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-5xl) 0;
}

.section-sm {
  padding: var(--space-3xl) 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  text-align: center;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-md);
  color: var(--color-text-muted);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
  line-height: var(--leading-relaxed);
}

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: var(--space-sm);
}


/* ── 公告栏 (Announcement Bar) ── */
.announcement-bar {
  background: var(--color-primary-dark);
  color: var(--color-text-white);
  height: var(--announcement-height);
  display: flex;
  align-items: center;
  overflow: hidden;
  position: relative;
  z-index: 1001;
}

.marquee {
  display: flex;
  animation: marquee 30s linear infinite;
  white-space: nowrap;
}

.marquee span {
  font-size: var(--text-sm);
  font-weight: 500;
  padding: 0 var(--space-2xl);
  letter-spacing: 0.5px;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}


/* ── 导航栏 (Navbar) ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--nav-height);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.nav-logo:hover {
  transform: scale(1.02);
}

.logo-icon {
  font-size: 1.6rem;
}

.logo-text {
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 0.3px;
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
  border-radius: 1px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.cart-btn {
  position: relative;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.cart-btn:hover {
  background: var(--color-primary-alpha);
}

.cart-btn svg {
  width: 22px;
  height: 22px;
  stroke: var(--color-text);
  fill: none;
  stroke-width: 1.5;
}

.cart-count {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 18px;
  height: 18px;
  background: var(--color-primary);
  color: white;
  font-size: 10px;
  font-weight: 700;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0);
  transition: all var(--transition-bounce);
}

.cart-count.show {
  opacity: 1;
  transform: scale(1);
}

/* 汉堡菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--color-primary-alpha);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端导航弹出 */
.mobile-nav {
  display: none;
  position: fixed;
  top: calc(var(--nav-height) + var(--announcement-height));
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 999;
  padding: var(--space-2xl);
  flex-direction: column;
  gap: var(--space-md);
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--transition-base);
}

.mobile-nav.open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.mobile-nav a {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-light);
  transition: color var(--transition-fast);
}

.mobile-nav a:hover {
  color: var(--color-primary);
}


/* ── 按钮系统 ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-base);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-white);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-text-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-text);
  border-color: var(--color-accent);
}

.btn-accent:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: var(--color-text-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-white {
  background: var(--color-bg-white);
  color: var(--color-primary);
  border-color: var(--color-bg-white);
}

.btn-white:hover {
  background: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-sm {
  padding: 10px 24px;
  font-size: var(--text-xs);
}

.btn-lg {
  padding: 18px 40px;
  font-size: var(--text-base);
}

.btn-block {
  width: 100%;
}


/* ── 卡片系统 ── */
.card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  border: 1px solid var(--color-border-light);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-lg);
}

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

.card-body {
  padding: var(--space-lg);
}

.card-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.card-text {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  line-height: var(--leading-relaxed);
}


/* ── Badge / 标签 ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: var(--color-primary-alpha);
  color: var(--color-primary);
}

.badge-accent {
  background: rgba(212, 168, 83, 0.15);
  color: var(--color-accent-dark);
}

.badge-white {
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-text);
}


/* ── 星级评价 ── */
.stars {
  display: inline-flex;
  gap: 2px;
  color: var(--color-accent);
  font-size: var(--text-md);
}

.stars .star {
  color: var(--color-accent);
}


/* ── Footer ── */
.footer {
  background: var(--color-primary-dark);
  color: var(--color-text-white);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand .logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.footer-brand p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-lg);
  max-width: 300px;
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  font-size: var(--text-md);
}

.footer-social a:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: var(--text-md);
  font-weight: 600;
  margin-bottom: var(--space-lg);
  color: var(--color-text-white);
}

.footer-links a {
  display: block;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-text-white);
}

/* Newsletter 表单 */
.footer-newsletter p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-md);
  line-height: var(--leading-relaxed);
}

.newsletter-form {
  display: flex;
  gap: var(--space-sm);
}

.newsletter-form input {
  flex: 1;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-pill);
  color: white;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.newsletter-form input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.newsletter-form input:focus {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
}

.newsletter-form button {
  padding: 12px 24px;
  background: var(--color-accent);
  color: var(--color-text);
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.newsletter-form button:hover {
  background: var(--color-accent-light);
  transform: translateY(-1px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-bottom-links a {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: var(--color-text-white);
}

.footer-made-with {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
}


/* ── 动画系统 ── */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* 延迟动画 */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }


/* ── 工具类 ── */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-heading { font-family: var(--font-heading); }
.font-body { font-family: var(--font-body); }

.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }
.text-white { color: var(--color-text-white); }

.bg-white { background: var(--color-bg-white); }
.bg-cream { background: var(--color-bg); }
.bg-hero { background: var(--color-hero-bg); }
.bg-primary { background: var(--color-primary); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.mt-auto { margin-top: auto; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}


/* ── 购物车侧栏 ── */
.cart-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.cart-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.cart-sidebar {
  position: fixed;
  top: 0;
  right: -420px;
  width: 420px;
  height: 100vh;
  background: var(--color-bg-white);
  z-index: 2001;
  box-shadow: var(--shadow-xl);
  transition: right var(--transition-base);
  display: flex;
  flex-direction: column;
}

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

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

.cart-header h3 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
}

.cart-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  font-size: var(--text-xl);
  transition: background var(--transition-fast);
}

.cart-close:hover {
  background: var(--color-primary-alpha);
}

.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg);
}

.cart-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.cart-item-img {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.cart-item-info {
  flex: 1;
}

.cart-item-name {
  font-weight: 600;
  font-size: var(--text-sm);
  margin-bottom: var(--space-xs);
}

.cart-item-variant {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.cart-item-price {
  font-weight: 700;
  color: var(--color-primary);
}

.cart-item-qty {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.cart-item-qty button {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.cart-item-qty button:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.cart-item-qty span {
  font-weight: 600;
  min-width: 20px;
  text-align: center;
}

.cart-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-2xl);
}

.cart-empty-icon {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
  opacity: 0.3;
}

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

.cart-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.cart-total-label {
  font-size: var(--text-md);
  font-weight: 600;
}

.cart-total-price {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
}

.cart-checkout-note {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-sm);
}


/* ── 页面顶部间距 ── */
.page-offset {
  height: calc(var(--nav-height) + var(--announcement-height));
}


/* ── 面包屑 ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-lg) 0;
}

.breadcrumb a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb .separator {
  color: var(--color-border);
}

.breadcrumb .current {
  color: var(--color-text);
  font-weight: 500;
}


/* ── 响应式 ── */
@media (max-width: 1024px) {
  :root {
    --text-4xl: 2.5rem;
    --text-5xl: 3rem;
    --text-3xl: 2rem;
  }

  .grid-4 { grid-template-columns: repeat(2, 1fr); }

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

@media (max-width: 768px) {
  :root {
    --text-4xl: 2rem;
    --text-5xl: 2.5rem;
    --text-3xl: 1.75rem;
    --text-2xl: 1.5rem;
    --space-5xl: 4rem;
    --space-4xl: 3rem;
  }

  .container, .container-wide {
    padding: 0 var(--space-md);
  }

  .nav-links {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

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

  .cart-sidebar {
    width: 100%;
    right: -100%;
  }

  .section {
    padding: var(--space-3xl) 0;
  }
}

@media (max-width: 480px) {
  :root {
    --text-4xl: 1.75rem;
    --text-3xl: 1.5rem;
    --text-2xl: 1.25rem;
    --space-5xl: 3rem;
  }

  .newsletter-form {
    flex-direction: column;
  }
}