/* ======================
   全局重置与变量定义
====================== */

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

/* 页面加载动画 */
#loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s ease, transform 0.6s ease;
}

#loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  transform: scale(0.95);
  pointer-events: none;
}

.loader {
  width: 60px;
  height: 60px;
  position: relative;
  animation: pulse 1.5s ease-in-out infinite;
}

.loader::before,
.loader::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 4px solid transparent;
  animation: spin 1.5s linear infinite;
}

.loader::before {
  border-top-color: var(--link);
  border-right-color: var(--link);
  animation-delay: 0s;
}

.loader::after {
  border-bottom-color: var(--accent);
  border-left-color: var(--accent);
  animation-delay: 0.75s;
  width: 40px;
  height: 40px;
  top: 10px;
  left: 10px;
}

@keyframes spin {
  0% {
    transform: rotate(0deg) scale(1);
  }
  50% {
    transform: rotate(180deg) scale(1.1);
  }
  100% {
    transform: rotate(360deg) scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

/* 加载文字效果 */
.loading-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 80px);
  font-size: 1rem;
  color: var(--muted);
  font-weight: 500;
  animation: pulse 1.5s ease-in-out infinite;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

#loading-screen.hidden .loading-text {
  opacity: 0;
  transform: translate(-50%, 70px);
}

#loading-screen.hidden .loader {
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

:root {
  /* 亮色主题 */
  --bg: #ffffff;
  --fg: #2c3e50;
  --muted: #7f8c8d;
  --link: #3498db;
  --link-hover: #2980b9;
  --border: #ecf0f1;
  --card-bg: #ffffff;
  --card-hover: #f8f9fa;
  --shadow: rgba(0, 0, 0, 0.08);
  --shadow-hover: rgba(0, 0, 0, 0.15);
  --accent: #e74c3c;
  --success: #2ecc71;
  --warning: #f39c12;
  --info: #3498db;
  --header-bg: var(--bg);
  --footer-bg: var(--bg);
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  /* 暗色主题 */
  --bg: #1a1a1a;
  --fg: #f1f1f1;
  --muted: #b0b0b0;
  --link: #4da6ff;
  --link-hover: #3590d8;
  --border: #333333;
  --card-bg: #252525;
  --card-hover: #2d2d2d;
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-hover: rgba(0, 0, 0, 0.45);
  --accent: #ff6b6b;
  --success: #51cf66;
  --warning: #ffd43b;
  --info: #4da6ff;
  --header-bg: var(--bg);
  --footer-bg: var(--bg);
  --transition: all 0.3s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background-color: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

/* 全局链接样式 */
a {
  text-decoration: none;
  color: inherit;
}

/* 链接悬停效果 */
a:hover {
  color: var(--link);
  text-decoration: none;
}

/* ======================
   通用组件
====================== */

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.btn-primary {
  display: inline-block;
  background-color: var(--link);
  color: white;
  padding: 0.6rem 1.4rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  margin-top: 1rem;
}

.btn-primary:hover {
  background-color: var(--link-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow-hover);
}

/* ======================
   导航栏
====================== */

.navbar {
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 1.4rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
  padding: 0.3rem 0;
  line-height: 1.4;
}

.nav-link:hover {
  color: var(--link);
}

/* ======================
   主内容区
====================== */

main {
  min-height: calc(100vh - 200px);
  padding: 2rem 0;
}

header {
  text-align: center;
  padding: 2rem 0 1rem;
}

.avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1.2rem;
  border: 2px solid var(--border);
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 0.6rem;
  color: var(--fg);
}

.tagline {
  font-size: 1.3rem;
  font-weight: 600;
  color: #666666 !important;
  margin-bottom: 1.2rem;
  letter-spacing: 0.5px;
}

.about-text {
  max-width: 600px;
  margin: 0 auto 1.8rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}



/* ======================
   区块容器：控制标题与卡片对齐
====================== */

.section-container {
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  box-sizing: border-box;
}

.section-container h2 {
  text-align: left;
  font-size: 1.8rem;
  margin-bottom: 2.5rem;
  color: var(--fg);
  padding-left: 0;
  font-weight: 600;
}

/* ======================
   卡片网格：自适应，最多3列
====================== */

.projects-grid,
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(clamp(280px, calc(100% / 3 - 2rem), 380px), 1fr));
  gap: 3rem;
  justify-items: stretch;
  align-items: stretch;
  grid-auto-rows: 1fr;
}



.project-card,
.post-card {
  background-color: var(--card-bg) !important;
  border: 1px solid var(--border) !important;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  width: 100%;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover,
.post-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.15);
  background-color: var(--card-hover) !important;
}

/* 项目链接样式 */
.project-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  position: relative;
}

/* 只为我的作品添加查看详情按钮 */
#projects .project-card .project-link::after {
  content: '查看详情';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  background: linear-gradient(135deg, #4a6cf7 0%, #357abd 100%);
  color: white;
  padding: 12px 32px;
  border-radius: 28px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 10;
  box-shadow: 0 4px 12px rgba(74, 108, 247, 0.4);
}

#projects .project-card:hover .project-link::after {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.project-card:hover .project-image,
.post-card:hover img {
  transform: scale(1.08);
  filter: brightness(0.9);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), filter 0.3s ease;
}

.project-card:hover .project-content,
.post-card:hover .post-excerpt {
  opacity: 1;
}

/* GitHub 仓库元信息 */
.repo-meta {
  margin-top: 1.2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* GitHub 仓库操作按钮 */
.repo-actions {
  display: flex;
  gap: 0.8rem;
  margin-top: 1rem;
}

.repo-action-btn {
  text-decoration: none;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.star-btn {
  background: linear-gradient(135deg, #ffd700 0%, #ffb700 100%);
  color: #333;
}

.star-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(255, 215, 0, 0.3);
}

.fork-btn {
  background: linear-gradient(135deg, #6c757d 0%, #495057 100%);
  color: white;
}

.fork-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(108, 117, 125, 0.3);
}

/* 语言徽章样式 */
.lang-badge {
  padding: 8px 16px;
  border-radius: 22px;
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
  box-shadow: 0 1px 3px var(--shadow);
  /* 移除默认颜色设置，使用内联样式的动态颜色 */
}

/* 为语言徽章添加左侧圆点指示器 */
.lang-badge::before {
  content: '';
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: currentColor;
  flex-shrink: 0;
  /* 圆点颜色继承文字颜色，反映不同编程语言 */
}

.stars,
.updated {
  font-size: 0.9rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.stars {
  color: #f1c40f;
  font-weight: 600;
}

.project-image,
.post-card img {
  width: 100%;
  height: 188px;
  object-fit: cover;
  display: block;
  background-color: var(--card-bg) !important;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), filter 0.3s ease;
}

.project-content,
.post-excerpt {
  padding: 1.8rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-content h3,
.post-title {
  font-size: 1.45rem;
  margin-bottom: 1rem;
  color: var(--fg) !important;
  font-weight: 600;
  flex-shrink: 0;
}

.project-content p,
.post-content {
  color: var(--muted) !important;
  font-size: 1.05rem;
  line-height: 1.75;
  flex: 1;
}

.post-date {
  color: var(--muted) !important;
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
  font-weight: 500;
}

.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.post-card img {
  transition: transform 0.3s ease;
}

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

.loading,
.error {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  grid-column: 1 / -1;
}

/* ======================
   悬浮按钮
====================== */

#back-to-top {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 44px;
  height: 44px;
  background-color: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, transform 0.2s ease, background-color 0.3s;
  z-index: 90;
  box-shadow: 0 2px 6px var(--shadow);
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

#back-to-top:hover {
  background-color: var(--link);
  color: white;
  transform: translateY(-2px);
}

#theme-toggle-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  background-color: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 90;
  box-shadow: 0 2px 6px var(--shadow);
  transition: background-color 0.3s, color 0.3s, transform 0.2s;
}

#theme-toggle-float:hover {
  background-color: var(--link);
  color: white;
  transform: translateY(-2px);
}

/* ======================
   页脚
====================== */

footer {
  background-color: var(--bg);
  color: var(--muted);
  padding: 1.5rem 1rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  line-height: 1.6;
}

.footer-line {
  margin: 0.3rem 0;
}

.beian-link,
.copyright {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.beian-link:hover {
  color: var(--link);
  text-decoration: underline;
}

/* ======================
   响应式适配
====================== */

@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-menu {
    gap: 1.2rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  header {
    padding: 1.5rem 0 2rem;
  }

  h1 {
    font-size: 1.8rem;
  }

  .tagline {
    font-size: 1rem;
  }

  .section-container h2 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
  }

  .projects-grid,
  .posts-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
  }

  .project-card,
  .post-card {
    max-width: none;
  }

  .project-image,
  .post-card img {
    height: 165px;
  }

  .project-content h3,
  .post-title {
    font-size: 1.3rem;
  }

  .project-content p,
  .post-content {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .avatar {
    width: 80px;
    height: 80px;
  }

  h1 {
    font-size: 1.6rem;
  }

  .btn-primary {
    padding: 0.5rem 1.2rem;
    font-size: 0.95rem;
  }
}