/* =========================================
   个人作品集 - 温暖简约风格
   ========================================= */
:root {
  --bg-color: #FAF7F2;
  --card-bg: #FFFFFF;
  --text-main: #333333;
  --text-light: #666666;
  --accent: #E67A3F;
  --accent-hover: #D46A2F;
  --border-radius: 12px;
  --shadow: 0 4px 12px rgba(0,0,0,0.05);
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 导航栏 */
header {
  position: sticky;
  top: 0;
  background: rgba(250, 247, 242, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-main);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-light);
  font-size: 0.95rem;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--accent);
}

.lang-switch {
  font-size: 0.85rem;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: 20px;
  padding: 6px 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.lang-switch:hover {
  background: var(--accent);
  color: white;
}

.hidden {
  display: none !important;
}

.hero-intro {
  max-width: 600px;
  margin: 2rem auto;
  text-align: left;
  background: white;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

/* 章节 */
section {
  padding: 4rem 0;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

section:last-of-type {
  border-bottom: none;
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 2rem;
  color: var(--text-main);
  position: relative;
  padding-bottom: 0.5rem;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background-color: var(--accent);
  border-radius: 2px;
}

/* Hero */
#hero {
  text-align: center;
  padding: 6rem 0 4rem;
}

.hero-avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1.5rem;
  border: 4px solid var(--card-bg);
  box-shadow: var(--shadow);
}

.hero-title {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-quote {
  font-style: italic;
  color: var(--text-light);
  max-width: 600px;
  margin: 2rem auto;
  padding: 1.5rem;
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  border-left: 4px solid var(--accent);
}

.scroll-down {
  display: inline-block;
  margin-top: 2rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
  40% {transform: translateY(-10px);}
  60% {transform: translateY(-5px);}
}

/* 卡片 */
.card {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-main);
}

.card-date {
  font-size: 0.85rem;
  color: var(--text-light);
  white-space: nowrap;
  margin-left: 1rem;
}

.card-content ul {
  list-style: none;
  padding-left: 0;
}

.card-content li {
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--text-light);
}

.card-content li::before {
  content: "•";
  color: var(--accent);
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* AI 高亮 */
.ai-highlight {
  background-color: rgba(230, 122, 63, 0.08);
  border-left: 3px solid var(--accent);
  padding: 1rem;
  margin-top: 1rem;
  border-radius: 0 8px 8px 0;
}

.ai-highlight-title {
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* 证据图 */
.evidence-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.evidence-item {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.3s;
  background: #f0f0f0;
  aspect-ratio: 16/10;
}

.evidence-item:hover {
  transform: scale(1.02);
}

.evidence-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.evidence-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 0.85rem;
  text-align: center;
  padding: 1rem;
}

.evidence-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,0.7);
  color: white;
  padding: 0.5rem;
  font-size: 0.8rem;
  text-align: center;
}

/* 技能标签 */
.skills-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.skill-tag {
  background: var(--card-bg);
  border: 1px solid rgba(0,0,0,0.1);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--text-light);
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.skill-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.skill-tag.ai {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.skill-tag.ai:hover {
  background: var(--accent-hover);
  color: white;
}

/* 联系方式 */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem;
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text-main);
  transition: transform 0.3s;
}

.contact-item:hover {
  transform: translateY(-2px);
  color: var(--accent);
}

.contact-icon {
  font-size: 1.5rem;
  color: var(--accent);
  width: 40px;
  text-align: center;
}

/* 页脚 */
footer {
  text-align: center;
  padding: 3rem 0;
  color: var(--text-light);
  font-size: 0.9rem;
  border-top: 1px solid rgba(0,0,0,0.05);
  margin-top: 2rem;
}

/* 响应式 */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .nav-links {
    display: none;
  }

  .card-header {
    flex-direction: column;
  }

  .card-date {
    margin-left: 0;
    margin-top: 0.3rem;
  }
  
  .evidence-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
}