/**
 *全站 UI 增强样式 V3.0
 * 现代极简主义设计 · 沉浸式内容体验
 * 
 * 设计原则：内容为核心，留白为艺术，交互为灵魂
 */

/* ===== 设计系统变量 ===== */
:root {
  /* 色彩系统 - 自然绿主题 */
  --color-primary-50: #f0f7f0;
  --color-primary-100: #dceddc;
  --color-primary-200: #c3e0c3;
  --color-primary-300: #9dcc9d;
  --color-primary-400: #7ab87a;
  --color-primary-500: #5a9d5a;
  --color-primary-600: #4a8a4a;
  --color-primary-700: #3d733d;
  --color-primary-800: #325e32;
  --color-primary-900: #2a4d2a;
  
  /* 中性色 - 温暖灰 */
  --color-neutral-50: #fafaf9;
  --color-neutral-100: #f5f5f4;
  --color-neutral-200: #e7e5e4;
  --color-neutral-300: #d6d3d1;
  --color-neutral-400: #a8a29e;
  --color-neutral-500: #78716c;
  --color-neutral-600: #57534e;
  --color-neutral-700: #44403c;
  --color-neutral-800: #292524;
  --color-neutral-900: #1c1917;
  
  /* 语义色 */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* 字体系统 */
  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', 
                Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 
               'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Fira Code', 'JetBrains Mono', 'SF Mono', Consolas, 
               'Liberation Mono', monospace;
  
  /* 间距系统 (8px 基准) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  
  /* 圆角系统 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* 阴影系统 */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 
               0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 
               0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 
               0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* 动效系统 */
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
}

/* ===== 深色模式 ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --color-neutral-50: #1c1917;
    --color-neutral-100: #292524;
    --color-neutral-200: #44403c;
    --color-neutral-300: #57534e;
    --color-neutral-400: #78716c;
    --color-neutral-500: #a8a29e;
    --color-neutral-600: #d6d3d1;
    --color-neutral-700: #e7e5e4;
    --color-neutral-800: #f5f5f4;
    --color-neutral-900: #fafaf9;
    
    --color-primary-500: #7ab87a;
    --color-primary-600: #9dcc9d;
    --color-primary-700: #c3e0c3;
    
    --bg-primary: #1c1917;
    --bg-secondary: #292524;
    --bg-tertiary: #44403c;
    
    --text-primary: #fafaf9;
    --text-secondary: #d6d3d1;
    --text-tertiary: #a8a29e;
    
    --border-light: #44403c;
    --border-medium: #57534e;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  }
}

/* ===== 全局排版优化 ===== */
body {
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-neutral-900);
}

/* ===== 页面过渡动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.page-content {
  animation: fadeInUp var(--duration-slow) var(--ease-out);
}

/* 滚动渐显 */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out), 
              transform 0.6s var(--ease-out);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 导航栏优化 ===== */
.nav {
  background: rgba(250, 249, 247, 0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-neutral-200);
  transition: all var(--duration-normal) var(--ease-out);
}

.nav.scrolled {
  background: rgba(250, 249, 247, 0.98);
  box-shadow: var(--shadow-sm);
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary-600);
  letter-spacing: 0.5px;
  transition: color var(--duration-fast);
}

.logo:hover {
  color: var(--color-primary-700);
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--color-neutral-600);
  transition: color var(--duration-fast);
  position: relative;
  padding: var(--space-sm) 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-primary-500);
  transition: width var(--duration-normal) var(--ease-out),
              left var(--duration-normal) var(--ease-out);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary-600);
}

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

/* ===== Hero 区域优化 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, 
    rgba(90, 157, 90, 0.08) 0%, 
    transparent 70%);
  border-radius: 50%;
  animation: heroGlow 10s ease-in-out infinite;
}

@keyframes heroGlow {
  0%, 100% { 
    transform: scale(1) translate(0, 0);
    opacity: 0.6;
  }
  50% { 
    transform: scale(1.15) translate(-5%, 5%);
    opacity: 1;
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--space-xl);
  animation: fadeInUp 1s var(--ease-out) 0.3s both;
}

.hero-tag {
  display: inline-block;
  background: rgba(90, 157, 90, 0.1);
  color: var(--color-primary-700);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-lg);
  backdrop-filter: blur(8px);
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-neutral-900);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-neutral-600);
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* ===== 关于卡片优化 ===== */
.about-card {
  background: var(--bg-primary, #fff);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  border: 1px solid var(--color-neutral-200);
  transition: all var(--duration-normal) var(--ease-out);
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-200);
}

.about-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  display: inline-block;
  transition: transform var(--duration-normal) var(--ease-spring);
}

.about-card:hover .about-icon {
  transform: scale(1.1) rotate(5deg);
}

.about-card h3 {
  font-size: 1.25rem;
  color: var(--color-neutral-800);
  margin-bottom: var(--space-sm);
}

.about-card p {
  color: var(--color-neutral-600);
  line-height: 1.7;
  font-size: 0.9375rem;
}

/* ===== 照片画廊优化 ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
}

.gallery-img {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform var(--duration-slow) var(--ease-out);
}

.gallery-item:hover .gallery-img {
  transform: scale(1.08);
}

.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
  color: #fff;
  padding: var(--space-lg) var(--space-md) var(--space-md);
  font-size: 0.875rem;
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.gallery-item:hover .gallery-caption {
  opacity: 1;
}

/* ===== 博客卡片优化 ===== */
.blog-card {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-xl);
  background: var(--bg-primary, #fff);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-neutral-200);
  transition: all var(--duration-normal) var(--ease-out);
  margin-bottom: var(--space-xl);
}

@media (max-width: 768px) {
  .blog-card {
    grid-template-columns: 1fr;
  }
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-200);
}

.blog-cover-wrap {
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.blog-cover {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  transition: transform var(--duration-slow) var(--ease-out);
}

.blog-card:hover .blog-cover {
  transform: scale(1.05);
}

.blog-content {
  padding: var(--space-lg);
}

.blog-category {
  display: inline-block;
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.blog-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-neutral-900);
  margin-bottom: var(--space-md);
  line-height: 1.4;
}

.blog-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast);
}

.blog-title a:hover {
  color: var(--color-primary-600);
}

.blog-summary {
  color: var(--color-neutral-600);
  line-height: 1.75;
  margin-bottom: var(--space-lg);
  font-size: 0.9375rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  color: var(--color-neutral-500);
  font-size: 0.8125rem;
  flex-wrap: wrap;
}

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.blog-tag {
  background: var(--color-neutral-100);
  color: var(--color-neutral-600);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  text-decoration: none;
  transition: all var(--duration-fast);
  border: 1px solid var(--color-neutral-200);
}

.blog-tag:hover {
  background: var(--color-primary-500);
  color: #fff;
  border-color: var(--color-primary-500);
}

/* ===== 联系表单优化 ===== */
.contact-form {
  background: var(--bg-primary, #fff);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-neutral-200);
}

.form-group {
  margin-bottom: var(--space-lg);
  position: relative;
}

.input, .textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--color-neutral-800);
  background: var(--bg-primary, #fff);
  border: 1px solid var(--color-neutral-300);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.input:hover, .textarea:hover {
  border-color: var(--color-neutral-400);
}

.input:focus, .textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

.textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== 按钮系统 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn--primary,
.btn-primary {
  background: var(--color-primary-500);
  color: #fff;
}

.btn--primary:hover,
.btn-primary:hover {
  background: var(--color-primary-600);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(90, 157, 90, 0.25);
}

.btn--primary:active,
.btn-primary:active {
  transform: translateY(0);
}

.btn--secondary,
.btn-secondary {
  background: transparent;
  color: var(--color-neutral-800);
  border: 1px solid var(--color-neutral-300);
}

.btn--secondary:hover,
.btn-secondary:hover {
  background: var(--color-neutral-100);
  border-color: var(--color-neutral-400);
}

/* ===== 页脚优化 ===== */
.footer {
  background: var(--color-neutral-900);
  color: var(--color-neutral-400);
  padding: var(--space-3xl) var(--space-xl) var(--space-xl);
  text-align: center;
  margin-top: var(--space-4xl);
}

.footer p {
  margin-bottom: var(--space-sm);
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-sub {
  color: var(--color-neutral-500);
  font-size: 0.8125rem;
  margin-bottom: var(--space-lg);
  font-style: italic;
}

.footer-filing {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  font-size: 0.75rem;
  color: var(--color-neutral-500);
}

.footer-filing a {
  color: var(--color-neutral-500);
  text-decoration: none;
  transition: color var(--duration-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.footer-filing a:hover {
  color: var(--color-primary-400);
}

.filing-badge {
  width: 16px;
  height: 16px;
  vertical-align: middle;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 48px;
  height: 48px;
  background: var(--color-primary-500);
  color: #fff;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary-600);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* ===== Cookie横幅优化 ===== */
#cookieConsent {
  background: rgba(28, 25, 23, 0.95);
  backdrop-filter: blur(12px);
  color: var(--color-neutral-200);
  padding: var(--space-md) var(--space-xl);
  font-size: 0.875rem;
}

#cookieConsent a {
  color: var(--color-primary-400);
  text-decoration: underline;
  text-underline-offset: 2px;
}

#cookieConsent button {
  background: var(--color-primary-500);
  color: #fff;
  border: none;
  padding: 8px 20px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background var(--duration-fast);
}

#cookieConsent button:hover {
  background: var(--color-primary-600);
}

/* ===== 无障碍优化 ===== */
:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* 跳过链接 */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary-500);
  color: #fff;
  padding: 8px 16px;
  z-index: 10000;
  transition: top var(--duration-fast);
}

.skip-link:focus {
  top: 0;
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .fade-in {
    opacity: 1;
    transform: none;
  }
}

/* ===== 响应式优化 ===== */
@media (max-width: 768px) {
  :root {
    --space-xl: 24px;
    --space-2xl: 32px;
    --space-3xl: 48px;
    --space-4xl: 64px;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .blog-card {
    grid-template-columns: 1fr;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .nav, .footer, .back-to-top, #cookieConsent {
    display: none !important;
  }
  
  .hero {
    min-height: auto;
    page-break-after: always;
  }
}