/* 
 * Fashion Womenswear Website - Core Styles
 * 极简现代风格设计 | 响应式布局 | 动画交互
 */

/* =========================================
   1. CSS Variables & Reset
   ========================================= */
:root {
  /* Color Palette */
  --primary-color: #2b2b2b;    /* 深灰 - 主要文字 */
  --secondary-color: #666666;  /* 中灰 - 次要文字 */
  --bg-color: #ffffff;         /* 纯白 - 背景 */
  --accent-color: #f4f4f4;     /* 浅灰 - 装饰/背景 */
  --border-color: #e5e5e5;     /* 浅灰 - 边框 */
  
  /* Typography */
  --font-main: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  
  /* Layout */
  --nav-height: 70px;
  --max-width: 1400px;
  --content-width: 1200px;
  
  /* Pico.css Overrides */
  --pico-font-family: var(--font-main);
  --pico-font-size: 16px;
  --pico-line-height: 1.7;
  --pico-color: var(--primary-color);
  --pico-background-color: var(--bg-color);
  --pico-primary: var(--primary-color);
  --pico-primary-background: var(--primary-color);
  --pico-primary-hover: #000000;
  --pico-primary-underline: transparent;
  --pico-border-radius: 0; /* 直角设计 */
}

/* Reset tweaks */
body {
  margin: 0;
  padding-top: var(--nav-height);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* =========================================
   2. Navigation (顶部导航)
   ========================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.nav-container {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Logo Area (Text Based) */
.brand-logo {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary-color);
  text-decoration: none;
  z-index: 1002;
}

/* Menu Links */
.nav-menu {
  display: flex;
  gap: 3.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--secondary-color);
  text-decoration: none;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  transition: color 0.3s ease;
  position: relative;
  padding: 5px 0;
}

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

/* Active Indicator */
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--primary-color);
}

/* Mobile Hamburger */
.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  font-size: 1.4rem;
  padding: 0.5rem;
  color: var(--primary-color);
  z-index: 1002;
}

/* =========================================
   3. Hero Carousel (首页轮播)
   ========================================= */
.hero-section {
  position: relative;
  height: calc(100vh - var(--nav-height)); /* Full viewport minus nav */
  width: 100%;
  overflow: hidden;
  background: #f0f0f0;
}

.carousel-inner {
  position: relative;
  width: 100%;
  height: 100%;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1.5s ease-in-out, visibility 1.5s;
  background-size: cover;
  background-position: center top;
}

.slide.active {
  opacity: 1;
  visibility: visible;
}

.slide-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.1); /* Subtle dark overlay for text contrast */
}

/* Slide Caption */
.slide-content {
  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  z-index: 10;
  width: 90%;
  max-width: 600px;
}

.slide-text {
  color: #ffffff;
  font-size: 1rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  font-weight: 300;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
  border: 1px solid rgba(255,255,255,0.4);
  padding: 12px 24px;
  display: inline-block;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(4px);
}

/* Carousel Controls */
.carousel-control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 1rem;
  opacity: 0.5;
  transition: opacity 0.3s;
  z-index: 20;
}
.carousel-control:hover { opacity: 1; }
.prev { left: 1rem; }
.next { right: 1rem; }

/* =========================================
   4. General Layout Components
   ========================================= */
/* Content Container */
.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 7rem 2rem;
}

/* Section Typography */
.section-header {
  text-align: center;
  margin-bottom: 5rem;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.section-desc {
  max-width: 700px;
  margin: 0 auto;
  color: var(--secondary-color);
  font-size: 1.05rem;
  line-height: 1.9;
  font-weight: 300;
}

.divider {
  width: 60px;
  height: 1px;
  background: var(--border-color);
  margin: 4rem auto;
}

/* Grid Systems */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 5rem;
  align-items: center;
}

/* =========================================
   5. Image Cards & Hover Effects
   ========================================= */
.card-item {
  display: block;
  text-decoration: none;
  cursor: pointer;
}

.img-wrapper {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 3/4; /* Modern portrait styling */
  background: var(--accent-color);
}

.img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.19, 1, 0.22, 1); /* Smooth elegant ease */
  display: block;
}

.card-item:hover .img-wrapper img {
  transform: scale(1.05); /* Slight zoom as requested */
}

.card-info {
  margin-top: 1.5rem;
  text-align: center;
}

.card-title {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--secondary-color);
  transition: color 0.3s;
}

.card-item:hover .card-title {
  color: var(--primary-color);
}

/* =========================================
   6. Specific Page Styles
   ========================================= */
/* Style Series Page */
.style-block {
  margin-bottom: 8rem;
}
.style-block:last-child { margin-bottom: 0; }

.detail-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

/* Philosophy Page */
.philosophy-text {
  text-align: justify;
  margin-bottom: 2rem;
}

.principle-item {
  padding: 2rem;
  background: #fafafa;
  text-align: center;
}
.principle-title {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
}

/* =========================================
   7. Footer
   ========================================= */
.site-footer {
  padding: 3rem 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: #999;
  letter-spacing: 0.1em;
  margin-top: auto;
  background: #fff;
}

/* =========================================
   8. Animation Classes
   ========================================= */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s cubic-bezier(0.19, 1, 0.22, 1) forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =========================================
   9. Responsive Media Queries
   ========================================= */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-2 {
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  :root { 
    --nav-height: 60px; 
    --pico-spacing: 1rem;
  }
  
  /* Mobile Nav */
  .hamburger {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    height: auto;
    background: white;
    flex-direction: column;
    padding: 2rem;
    gap: 2rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    
    /* Hidden state */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all 0.3s ease;
  }
  
  .nav-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  /* Mobile Grid */
  .grid-3, .grid-2, .detail-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .container {
    padding: 4rem 1.5rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  /* Hero adjustments */
  .hero-section {
    height: 70vh; /* Smaller hero on mobile */
  }
  
  /* Text align for mobile readibility */
  .grid-2 .text-content {
    order: -1; /* Text first on mobile if needed, or keep order */
  }
}