/* 
 * 全局样式设计 - 极简时尚美学
 * 遵循现代、简约、高对比度原则
 */

:root {
  /* 设计令牌 - 颜色系统 */
  --color-bg: #0a0a0a;           /* 深空灰/黑色背景 */
  --color-text: #f5f5f5;         /* 象牙白文字 */
  --color-text-muted: #a3a3a3;   /* 柔和灰副标题 */
  --color-accent: #d4c4b7;       /* 浅褐色/驼色点缀 */
  
  /* 设计令牌 - 字体系统 */
  --font-serif: 'Playfair Display', 'Noto Serif SC', serif; /* 标题字体：优雅衬线 */
  --font-sans: 'Inter', 'Helvetica Neue', 'Arial', sans-serif; /* 正文字体：现代无衬线 */
  
  /* 间距与布局 */
  --spacing-base: 1rem;
  --header-height: 80px;
  
  /* 动画 */
  --transition-slow: 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-medium: 0.5s ease-out;
}

/* 基础重置与排版 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  height: 100%;
}

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

a:hover {
  opacity: 0.7;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
}

/* 实用工具类 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.text-center { text-align: center; }
.uppercase { text-transform: uppercase; letter-spacing: 0.1em; }
.serif { font-family: var(--font-serif); }
.sans { font-family: var(--font-sans); }

/* 导航栏 - 磨砂玻璃效果 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 3rem;
  background: rgba(10, 10, 10, 0.5); /* 半透明背景 */
  backdrop-filter: blur(12px); /* 磨砂玻璃 */
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-logo svg {
  height: 32px;
  fill: var(--color-text);
}

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

.nav-link {
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--color-text);
  position: relative;
}

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

.nav-link:hover::after {
  width: 100%;
}

/* 页面容器与切换动画 */
#app {
  min-height: 100vh;
  padding-top: var(--header-height);
  opacity: 0;
  transition: opacity var(--transition-medium);
}

#app.loaded {
  opacity: 1;
}

/* 首页 (Index) 样式 */
.hero-section {
  position: relative;
  height: calc(100vh - var(--header-height));
  width: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
  filter: brightness(0.7); /* 降低亮度以突出文字 */
}

.hero-content {
  text-align: center;
  max-width: 800px;
  padding: 2rem;
  z-index: 1;
}

.hero-title {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 300;
}

.series-preview {
  padding: 6rem 0;
  background-color: var(--color-bg);
}

.section-title {
  text-align: center;
  margin-bottom: 4rem;
  font-size: 2rem;
  letter-spacing: 0.1em;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 0 2rem;
}

.preview-card {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  cursor: pointer;
  group: hover;
}

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

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

.preview-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.preview-card:hover .preview-overlay {
  opacity: 1;
}

.preview-text {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: #fff;
  transform: translateY(20px);
  transition: transform 0.4s ease;
}

.preview-card:hover .preview-text {
  transform: translateY(0);
}

.quote-module {
  background-color: #1a1a1a;
  color: #d4d4d4;
  padding: 8rem 2rem;
  text-align: center;
}

.quote-text {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto;
  font-style: italic;
}

/* 系列 (Series) 样式 */
.series-header {
  height: 40vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: #111;
  text-align: center;
}

.story-container {
  display: flex;
  flex-direction: column;
  gap: 8rem;
  padding-bottom: 6rem;
}

.story-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  min-height: 80vh;
  padding: 0 4rem;
}

.story-item.reverse {
  direction: rtl; /* 简单的左右交替布局 */
}

.story-item.reverse .story-content {
  direction: ltr; /* 恢复文字方向 */
}

.story-img-wrapper {
  width: 100%;
  height: 80vh;
  overflow: hidden;
}

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

.story-content {
  padding: 2rem;
}

.story-title {
  font-size: 3rem;
  margin-bottom: 2rem;
  color: var(--color-accent);
}

.story-desc {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-text-muted);
}

/* 叙事 (Narrative) 样式 */
.narrative-header {
  height: 50vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.narrative-bg {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  filter: grayscale(100%);
}

.narrative-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 6rem 2rem;
  font-size: 1.2rem;
  line-height: 2;
}

.article-title {
  font-size: 2.5rem;
  margin-bottom: 3rem;
  text-align: center;
  font-family: var(--font-serif);
}

.article-text p {
  margin-bottom: 2rem;
  text-align: justify;
}

.article-text p:first-of-type::first-letter {
  font-size: 4rem;
  float: left;
  line-height: 1;
  margin-right: 0.5rem;
  font-family: var(--font-serif);
  color: var(--color-accent);
}

.narrative-images {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  margin: 4rem 0;
}

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

.img-caption {
  text-align: center;
  font-size: 0.9rem;
  color: #666;
  margin-top: 1rem;
  font-style: italic;
}

/* 页脚 */
.footer {
  padding: 3rem 0;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8rem;
  color: #666;
}

/* 响应式适配 */
@media (max-width: 1024px) {
  .story-item {
    gap: 2rem;
    padding: 0 2rem;
  }
  .hero-title { font-size: 3rem; }
}

@media (max-width: 768px) {
  .navbar { padding: 0 1.5rem; }
  .nav-links { gap: 1.5rem; }
  
  .preview-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .story-item {
    grid-template-columns: 1fr;
    height: auto;
    min-height: auto;
    padding: 2rem 1rem;
    gap: 2rem;
  }

  .story-item.reverse { direction: ltr; }

  .story-img-wrapper {
    height: 60vh;
  }

  .hero-title { font-size: 2.5rem; }
  .story-title { font-size: 2rem; }
}

/* 动画工具类 */
.fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s ease forwards;
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }

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