/* 
 * 全局样式文件 - 极简主义设计
 * 主色调：黑白灰
 * 字体：优雅无衬线体
 */

/* =========================================
   1. Reset & Base
   ========================================= */
:root {
  --color-bg: #ffffff;
  --color-text-main: #1a1a1a;
  --color-text-light: #666666;
  --color-accent: #333333; /* 极简点缀色 */
  --font-primary: "Helvetica Neue", "Helvetica", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
  --spacing-unit: 8px;
  --container-width: 1440px;
  --transition-smooth: all 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

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

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

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

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

a:hover {
  opacity: 0.6;
}

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

/* =========================================
   2. Typography
   ========================================= */
h1, h2, h3, h4, h5, h6 {
  font-weight: 300; /* 细字重 */
  line-height: 1.2;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

.text-light { color: var(--color-text-light); }
.text-center { text-align: center; }
.text-justify { text-align: justify; }
.uppercase { text-transform: uppercase; }

/* 极简文案样式 */
.caption {
  font-size: 0.875rem;
  color: var(--color-text-light);
  letter-spacing: 0.1em;
  margin-top: 0.5rem;
}

/* =========================================
   3. Layout Components
   ========================================= */
.container {
  width: 90%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-unit);
}

/* Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 2rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(5px);
  transition: padding 0.3s ease;
}

header.scrolled {
  padding: 1rem 5%;
  border-bottom: 1px solid #f0f0f0;
}

.brand {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--color-text-main);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 3rem;
}

nav a {
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-text-main);
  transition: width 0.3s ease;
}

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

/* Footer */
footer {
  padding: 4rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-light);
  letter-spacing: 0.1em;
  border-top: 1px solid #f5f5f5;
  margin-top: 4rem;
}

/* =========================================
   4. Page Specific
   ========================================= */

/* Hero Section */
.hero {
  height: 100vh;
  width: 100%;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

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

.slide.active {
  opacity: 1;
}

.hero-text {
  position: relative;
  z-index: 10;
  color: #fff;
  text-align: center;
  mix-blend-mode: difference; /* 增强文字在任意背景下的可读性 */
}

/* Grid System */
.grid-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 4rem 0;
}

.grid-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.grid-item img {
  width: 100%;
  height: 100%;
  transition: var(--transition-smooth);
}

.grid-item:hover img {
  transform: scale(1.03);
  filter: brightness(0.95);
}

.grid-item .info {
  margin-top: 1rem;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.4s ease;
}

.grid-item:hover .info {
  opacity: 1;
  transform: translateY(0);
}

/* Series Page */
.series-block {
  margin-bottom: 8rem;
  padding-top: 6rem; /* 避开固定导航栏 */
}

.series-header {
  margin-bottom: 3rem;
  max-width: 600px;
}

.series-gallery {
  display: flex;
  overflow-x: auto;
  gap: 1.5rem;
  padding-bottom: 2rem;
  scrollbar-width: none; /* Firefox */
}

.series-gallery::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

.series-item {
  min-width: 300px;
  max-width: 400px;
  flex: 0 0 auto;
}

/* Inspiration Page */
.mood-board {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
  padding-top: 6rem;
}

.mood-item {
  position: relative;
  grid-column: span 4;
}

.mood-item.large { grid-column: span 6; }
.mood-item.small { grid-column: span 3; }
.mood-item.tall { grid-row: span 2; }

.color-palette {
  display: flex;
  margin-top: 1rem;
  gap: 0.5rem;
}

.color-swatch {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
}

/* =========================================
   5. Animations
   ========================================= */
.fade-in {
  animation: fadeInUp 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  opacity: 0;
  transform: translateY(20px);
}

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

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

/* =========================================
   6. Responsive
   ========================================= */
@media (max-width: 1024px) {
  .grid-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  
  header {
    padding: 1.5rem 5%;
  }

  nav ul {
    gap: 1.5rem;
  }
  
  .grid-gallery {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .mood-item, .mood-item.large, .mood-item.small {
    grid-column: span 12;
  }
  
  .series-gallery {
    padding-right: 5%; /* 右侧留白以便滑动 */
  }
}