/* ==========================================================================
   Project: 风尚映鉴 (Fashion Vision) - Global Styles
   Core Principles: Minimalism, High Performance, Visual Aesthetics
   ========================================================================== */

/* 1. Font Imports */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500&family=Noto+Serif+SC:wght@400;500;700&family=Playfair+Display:ital,wght@0,400;0,600;1,400&display=swap');

/* 2. CSS Variables (Design Tokens) */
:root {
  /* Color Palette */
  --c-bg-primary: #F5F3F0;    /* 沙石灰 */
  --c-bg-secondary: #F8F6F4;  /* 浅陶土纹理底色 */
  --c-text-main: #1A1A1A;     /* 雾霭黑 */
  --c-text-sub: #2C2C2C;      /* 深灰 */
  --c-text-mute: #7F7F7F;     /* 浅灰 */
  --c-accent: #B8A18D;        /* 肌理陶土色 */
  --c-footer: #AAAAAA;        /* 页脚灰 */
  
  /* Typography */
  --font-display: 'Playfair Display', serif;
  --font-serif: 'Noto Serif SC', serif;
  --font-sans: 'Noto Sans SC', sans-serif;

  /* Layout */
  --grid-gap: 24px;
  --container-padding: 4vw;
  --nav-height: 80px;

  /* Transitions */
  --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --duration-page: 0.6s;
  --duration-hover: 0.4s;
}

/* 3. Global Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  height: 100%;
}

body {
  background-color: var(--c-bg-primary);
  color: var(--c-text-main);
  font-family: var(--font-sans);
  font-weight: 300; /* Light */
  line-height: 1.6;
  overflow-x: hidden;
  opacity: 0;
  animation: pageFadeIn var(--duration-page) var(--ease-smooth) forwards;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul {
  list-style: none;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  user-select: none;
  -webkit-user-drag: none;
}

/* 4. Typography Utilities */
.font-display { font-family: var(--font-display); }
.font-serif { font-family: var(--font-serif); }
.font-sans { font-family: var(--font-sans); }

.text-center { text-align: center; }
.text-accent { color: var(--c-accent); }
.text-mute { color: var(--c-text-mute); }

/* 5. Layout Utilities */
.container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

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

/* 6. Component: Navigation */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  padding: 0 var(--container-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background: rgba(245, 243, 240, 0.95);
  backdrop-filter: blur(8px);
  transition: transform 0.3s ease;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.05em;
  color: var(--c-text-main);
  font-weight: 600;
}

.nav-menu {
  display: flex;
  gap: 3rem;
}

.nav-link {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--c-text-sub);
  position: relative;
  padding-bottom: 4px;
}

/* Navigation Hover Animation: Center Expand */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 1px;
  background-color: var(--c-text-main);
  transition: width 0.3s ease, left 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
  left: 0;
}

/* Mobile Hamburger */
.hamburger {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
  z-index: 1001;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 1px;
  background-color: var(--c-text-main);
  transition: 0.3s;
}

/* 7. Component: Image Container (Hover Effects) */
.img-wrapper {
  position: relative;
  overflow: hidden;
  transition: border-color var(--duration-hover);
  border: 0 solid transparent;
  width: 100%;
}

.img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.img-wrapper:hover {
  border: 2px solid var(--c-accent);
}

.img-wrapper:hover img {
  transform: scale(1.02);
}

/* 8. Page Specific: Home (index.html) */
.hero {
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 0; /* Full screen */
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.9); /* Slight dim for text */
}

.hero-content {
  text-align: center;
  color: #fff;
  z-index: 10;
  mix-blend-mode: difference;
}

.hero-title {
  font-family: var(--font-display);
  font-size: 4rem;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  letter-spacing: 0.4em;
  font-weight: 400;
}

.narrative-section {
  padding: 0;
  height: 80vh; /* Fixed height for grid */
}

.narrative-col {
  height: 100%;
  position: relative;
}

.narrative-col .img-wrapper {
  height: 80%; /* 80% image height */
  width: 100%;
}

.narrative-col .col-text {
  height: 20%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  color: var(--c-text-sub);
  letter-spacing: 0.1em;
}

.quote-block {
  padding: 8rem 0;
  background-color: var(--c-bg-secondary);
  display: flex;
  justify-content: center;
  align-items: center;
}

.quote-inner {
  max-width: 600px;
  text-align: center;
}

.quote-text {
  font-family: var(--font-display);
  font-size: 2rem;
  font-style: italic;
  color: var(--c-text-main);
  margin-bottom: 1rem;
}

/* 9. Page Specific: Style (style.html) */
.filter-bar {
  padding: 8rem 0 3rem;
  display: flex;
  justify-content: center;
  gap: 3rem;
}

.filter-tag {
  font-family: var(--font-sans);
  color: var(--c-text-mute);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  cursor: default;
}

.gallery-grid-layout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 4rem;
}

.style-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.style-desc {
  font-family: var(--font-serif);
  font-size: 0.875rem;
  color: var(--c-text-mute);
  text-align: center;
  font-style: italic;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 2rem;
  padding: 2rem 0 6rem;
  font-family: var(--font-sans);
  color: var(--c-text-mute);
}

.pagination-btn {
  cursor: pointer;
  transition: color 0.3s;
  font-size: 1.2rem;
}
.pagination-btn:hover { color: var(--c-accent); }

/* 10. Page Specific: Detail (detail.html) */
.detail-nav {
  padding: 8rem 0 4rem;
  display: flex;
  justify-content: center;
}

.nav-circle-wrapper {
  display: flex;
  gap: 2rem;
}

.nav-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 1px solid #E0E0E0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--c-text-mute);
  cursor: pointer;
  transition: all 0.3s;
  background: #fff;
}

.nav-circle:hover, .nav-circle.active {
  border-color: var(--c-accent);
  color: var(--c-accent);
  transform: translateY(-2px);
}

.micro-view {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 4rem;
  align-items: flex-start;
  margin-bottom: 6rem;
}

.zoom-container {
  width: 100%;
  aspect-ratio: 4/3;
  background-color: #EEE;
  cursor: crosshair;
}

.craft-info {
  padding-top: 2rem;
}

.craft-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: var(--c-text-main);
  font-weight: 500;
}

.craft-desc {
  font-family: var(--font-sans);
  color: var(--c-text-mute);
  line-height: 1.8;
  margin-bottom: 3rem;
  font-weight: 300;
}

.material-graph {
  margin-top: 2rem;
}

.material-bar {
  display: flex;
  height: 6px;
  width: 100%;
  margin-bottom: 1rem;
}

.bar-segment {
  height: 100%;
}

.keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.keyword {
  font-size: 0.75rem;
  padding: 4px 10px;
  border: 1px solid #E0E0E0;
  color: var(--c-text-mute);
}

/* 11. Footer */
.site-footer {
  text-align: center;
  padding: 2rem 0;
  font-size: 12px;
  color: var(--c-footer);
  font-family: var(--font-sans);
  border-top: 1px solid rgba(0,0,0,0.03);
}

/* 12. Animations */
@keyframes pageFadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

/* 13. Responsive Breakpoints */

/* Tablet (768px - 1199px) */
@media (max-width: 1199px) {
  .narrative-section {
    height: auto;
  }
  .narrative-grid, .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .micro-view {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* Mobile (<= 767px) */
@media (max-width: 767px) {
  :root {
    --container-padding: 6vw;
  }

  .nav-menu {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background-color: var(--c-bg-primary);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    text-align: center;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    display: none; /* JS toggle */
  }
  
  .nav-menu.is-open {
    display: flex;
  }

  .hamburger {
    display: flex;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .narrative-grid, .grid-3, .gallery-grid-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .filter-bar {
    padding: 6rem 0 2rem;
    flex-wrap: wrap;
    gap: 1.5rem;
  }
  
  .nav-circle-wrapper {
    overflow-x: auto;
    padding-bottom: 10px;
    width: 100%;
    justify-content: flex-start;
  }
  
  .nav-circle {
    flex-shrink: 0;
  }
}