/* ===== 变量与基础 ===== */
:root {
  --color-bg: #fafaf8;
  --color-bg-dark: #1a1a18;
  --color-text: #1a1a18;
  --color-text-muted: #6b6b68;
  --color-accent: #8b7355;
  --color-border: #e8e6e3;
  --font-serif: "Cormorant Garamond", "Noto Serif SC", serif;
  --font-sans: "DM Sans", "PingFang SC", sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

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

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

/* ===== 页头 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.header.scrolled {
  border-bottom-color: var(--color-border);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}

.nav-item a {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

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

.nav-item.has-dropdown {
  position: relative;
}

.nav-item.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 0;
  min-width: 520px;
  padding: var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.dropdown--wide {
  min-width: 720px;
}

.dropdown-grid--stone {
  grid-template-columns: repeat(5, 1fr);
}

.dropdown-sm {
  min-width: 200px;
}

.dropdown-sm a {
  display: block;
  padding: var(--space-xs) 0;
  font-size: 0.9rem;
  text-transform: none;
}

.dropdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.dropdown-title {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.dropdown-col a {
  display: block;
  padding: var(--space-xs) 0;
  font-size: 0.9rem;
  color: var(--color-text);
}

.dropdown-col a:hover {
  color: var(--color-accent);
}

.header-actions {
  display: flex;
  align-items: center;
}

.cart-btn {
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--color-border);
  background: transparent;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
}

.cart-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.4) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: var(--space-lg);
  color: #fff;
}

.hero-label {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  opacity: 0.9;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-lg);
  max-width: 14ch;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border: 2px solid #fff;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background var(--transition), color var(--transition);
}

.hero-cta:hover {
  background: #fff;
  color: var(--color-text);
}

/* ===== 区块通用 ===== */
.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: var(--space-lg);
}

/* ===== SODAI 品牌区 ===== */
.brand-section {
  padding: var(--space-2xl) var(--space-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.brand-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.brand-card {
  display: block;
  transition: transform var(--transition);
}

.brand-card:hover {
  transform: translateY(-4px);
}

.brand-card-img {
  aspect-ratio: 3/4;
  background-size: cover;
  background-position: center;
  margin-bottom: var(--space-sm);
}

.brand-card span {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 500;
}

/* ===== 按品类选购 ===== */
.shop-category {
  padding: var(--space-2xl) var(--space-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.category-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: auto auto;
  gap: var(--space-md);
}

.category-card {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
}

.category-card-lg {
  grid-row: span 2;
  aspect-ratio: auto;
  min-height: 100%;
}

.category-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

.category-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-lg);
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  color: #fff;
}

.category-card-content h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.category-link {
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  opacity: 0.9;
}

/* ===== 热门推荐 ===== */
.trending {
  padding: var(--space-2xl) var(--space-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.trending-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 500;
  text-align: center;
  margin-bottom: var(--space-lg);
}

.trending-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.trending-card {
  position: relative;
  display: block;
  aspect-ratio: 16/10;
  overflow: hidden;
}

.trending-card-img {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.6s ease;
}

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

.trending-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-lg);
  background: linear-gradient(to top, rgba(0,0,0,0.75), transparent);
  color: #fff;
}

.trending-card-content h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.trending-cta {
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--color-bg-dark);
  color: #e8e6e3;
  padding: var(--space-2xl) var(--space-lg) var(--space-lg);
}

.footer-grid {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.footer-company {
  font-size: 0.95rem;
  margin-bottom: var(--space-xs);
}

.footer-founded {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.footer-city {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.footer-address {
  font-style: normal;
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.footer a {
  color: inherit;
}

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

.footer-links h4 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.footer-links a {
  display: block;
  padding: var(--space-xs) 0;
  font-size: 0.95rem;
}

.footer-contact {
  margin-top: var(--space-sm);
  font-weight: 500;
}

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding-top: var(--space-lg);
  text-align: center;
}

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .brand-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .category-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .category-card-lg {
    grid-row: span 1;
    aspect-ratio: 16/10;
  }

  .dropdown {
    min-width: 320px;
  }

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

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

  .dropdown--wide {
    min-width: 320px;
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    padding: 5rem var(--space-lg) var(--space-lg);
    background: var(--color-bg);
    border-left: 1px solid var(--color-border);
    box-shadow: -10px 0 30px rgba(0,0,0,0.08);
  }

  .nav.is-open {
    display: block;
  }

  body.menu-open::after {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 99;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .nav-item a {
    display: block;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-item .dropdown {
    position: static;
    transform: none;
    min-width: auto;
    margin: var(--space-xs) 0 var(--space-sm);
    padding: var(--space-sm);
    opacity: 1;
    visibility: visible;
    display: none;
    box-shadow: none;
    border: none;
    background: var(--color-bg);
  }

  .nav-item.has-dropdown.is-open .dropdown {
    display: block;
  }

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

  .menu-toggle {
    display: block;
  }

  .brand-cards {
    grid-template-columns: 1fr;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-address {
    margin-bottom: var(--space-md);
  }
}