/* =========================================
   1. Design Tokens & Global Reset
   ========================================= */
:root {
  /* Color Palette */
  --bg-color: #f8f9fa;       /* 高级灰背景 */
  --text-color: #212529;     /* 深炭黑文字 */
  --white: #ffffff;          /* 纯白 */
  --accent-color: #9c6f5f;   /* 陶土红 - 交互色 */
  --overlay-light: rgba(255, 255, 255, 0.3); /* 浅色遮罩 */
  --overlay-dark: rgba(0, 0, 0, 0.1);        /* 深色微遮罩 */
  
  /* Typography */
  --font-main: "Inter", "Helvetica Neue", "Source Han Sans CN", "Noto Sans SC", sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  
  /* Spacing */
  --container-width: 1200px;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  
  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-fade: opacity 0.3s ease;
}

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

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

/* 动态槽位预留 */
.slot-container {
  display: contents;
}

/* =========================================
   2. Typography & Utilities
   ========================================= */
h1, h2, h3, h4 {
  font-weight: var(--font-weight-light);
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 3.5rem; line-height: 1.2; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; font-weight: var(--font-weight-regular); }

p {
  margin-bottom: var(--spacing-sm);
  font-weight: var(--font-weight-light);
  color: #495057;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.text-center { text-align: center; }
.hidden { display: none !important; }

/* =========================================
   3. Navigation (Glassmorphism)
   ========================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--spacing-lg);
  background: rgba(248, 249, 250, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid rgba(0,0,0,0.02);
  transition: var(--transition-smooth);
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.1em;
  color: var(--text-color);
}

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

.nav-item a {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  position: relative;
  padding-bottom: 4px;
  color: #6c757d;
}

.nav-item a:hover,
.nav-item a.active {
  color: var(--text-color);
}

/* 极简下划线交互 */
.nav-item a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: 0;
  left: 0;
  background-color: var(--accent-color);
  transition: width 0.3s ease;
}

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

/* =========================================
   4. Home Page: Hero Slider
   ========================================= */
.hero-section {
  position: relative;
  height: 100vh;
  width: 100%;
  overflow: hidden;
}

.slider-container {
  height: 100%;
  position: relative;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
  z-index: 1;
}

.slide.active {
  opacity: 1;
  z-index: 2;
}

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
}

/* 叠加图层 */
.slide-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.15); /* 极淡遮罩 */
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-text {
  text-align: center;
  color: var(--white);
  /* 增加文字阴影以确保在浅色图上也能看清，或者使用深色文字配合浅色遮罩 */
  /* 设计要求是浅色图层，为了对比度，文字使用深灰或根据图片自适应，这里采用深色文字+淡白遮罩的组合方案 */
  color: var(--text-color); 
  z-index: 10;
  opacity: 0;
  transform: translateY(20px);
  transition: all 1s ease 0.5s;
}

.slide.active .hero-text {
  opacity: 1;
  transform: translateY(0);
}

.hero-text h1 {
  font-size: 4rem;
  font-weight: 200;
  margin: 0;
  text-shadow: 0 2px 10px rgba(255,255,255,0.5);
}

/* 指示器 */
.slider-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 15px;
  z-index: 20;
}

.indicator {
  width: 40px;
  height: 2px;
  background: rgba(0,0,0,0.2);
  cursor: pointer;
  transition: background 0.3s;
}

.indicator.active {
  background: var(--text-color);
}

/* =========================================
   5. Home Page: Inspiration Grid
   ========================================= */
.inspiration-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.grid-item {
  position: relative;
  aspect-ratio: 1 / 1; /* 方形裁剪 */
  overflow: hidden;
  cursor: default;
}

.grid-item img {
  width: 100%;
  height: 100%;
  transition: transform 0.6s ease;
}

.grid-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.grid-text {
  font-size: 1.2rem;
  letter-spacing: 0.2em;
  color: var(--text-color);
  transform: translateY(10px);
  transition: transform 0.4s ease;
}

.grid-item:hover img {
  transform: scale(1.05);
}

.grid-item:hover .grid-overlay {
  opacity: 1;
}

.grid-item:hover .grid-text {
  transform: translateY(0);
}

/* =========================================
   6. Gallery Page: Masonry Layout
   ========================================= */
.gallery-header {
  padding: 160px 0 60px;
  text-align: center;
}

.gallery-subtitle {
  font-family: serif; /* 增加一点诗意 */
  font-style: italic;
  color: #6c757d;
  font-size: 1.2rem;
}

.masonry-container {
  column-count: 3;
  column-gap: var(--spacing-md);
  padding-bottom: var(--spacing-xl);
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.masonry-item img {
  width: 100%;
  transition: transform 0.6s ease, box-shadow 0.6s ease;
}

.masonry-item:hover img {
  transform: scale(1.02);
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

/* =========================================
   7. Philosophy Page
   ========================================= */
.philosophy-header {
  padding: 160px 0 80px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.philosophy-quote {
  font-size: 1.2rem;
  line-height: 1.8;
  color: #6c757d;
  border-left: 2px solid var(--accent-color);
  padding-left: 20px;
  display: inline-block;
  margin-top: 20px;
}

.philosophy-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  margin-bottom: 120px;
  opacity: 0; /* JS触发淡入 */
  transform: translateY(30px);
  transition: all 0.8s ease;
}

.philosophy-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.philosophy-section.reverse {
  flex-direction: row-reverse;
}

.philo-content {
  flex: 1;
  padding: 0 var(--spacing-md);
}

.philo-image {
  flex: 1;
  height: 600px;
}

.philo-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.philo-text h3 {
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

.philo-text p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #495057;
}

/* 全宽背景区块 */
.full-width-section {
  position: relative;
  width: 100vw;
  height: 70vh;
  margin-left: calc(-50vw + 50%); /* 破局container */
  background-attachment: fixed; /* 视差效果 */
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  display: flex;
  justify-content: center;
  align-items: center;
}

.text-box-overlay {
  background: rgba(255, 255, 255, 0.9);
  padding: 60px;
  max-width: 600px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

/* =========================================
   8. Footer
   ========================================= */
footer {
  background-color: #e9ecef; /* 略深于背景 */
  padding: 40px 0;
  text-align: center;
  color: #adb5bd;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
}

/* =========================================
   9. Responsive Design
   ========================================= */
@media (max-width: 1024px) {
  :root {
    --spacing-xl: 5rem;
  }
  
  .navbar { padding: 0 var(--spacing-md); }
  
  .inspiration-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .masonry-container {
    column-count: 2;
  }
  
  .philo-image { height: 400px; }
}

@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  
  .navbar { height: 60px; }
  
  .inspiration-grid {
    grid-template-columns: 1fr;
  }
  
  .masonry-container {
    column-count: 1;
  }
  
  .philosophy-section, 
  .philosophy-section.reverse {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .philo-image {
    width: 100%;
    height: auto;
    aspect-ratio: 4/3;
  }
  
  .hero-text h1 {
    font-size: 2.5rem;
  }
  
  .text-box-overlay {
    width: 90%;
    padding: 30px;
  }
}