/* ========== 全局样式 ========== */
:root {
  --content-max-width: 960px;
  --section-padding: 56px 24px;
}

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

body {
  font-family: "Noto Sans SC", system-ui, -apple-system, sans-serif;
  line-height: 1.6;
}

/* ========== 布局 ========== */
mdui-layout {
  min-height: 100vh;
}

mdui-layout-main {
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
}

.content-wrapper {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--section-padding);
  flex: 1;
}

/* ========== 顶部导航栏 ========== */
mdui-top-app-bar {
  --mdui-comp-top-app-bar-small-top-container-height: 64px;
}

.nav-title {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-right: 16px;
  cursor: pointer;
  text-decoration: none;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgb(var(--mdui-color-primary)), rgb(var(--mdui-color-tertiary)));
  color: rgb(var(--mdui-color-on-primary));
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.nav-logo-text {
  font-weight: 700;
  font-size: 1.125rem;
  color: rgb(var(--mdui-color-on-surface));
  letter-spacing: 0.5px;
}

.drawer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 16px 12px;
}

.drawer-brand .nav-logo {
  width: 36px;
  height: 36px;
  font-size: 0.875rem;
  border-radius: 12px;
}

.drawer-brand .nav-logo-text {
  font-size: 1.25rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  text-decoration: none;
}

.nav-links mdui-button-icon {
  display: none;
}

.nav-spacer {
  flex: 1;
}

.menu-btn {
  display: none;
}

/* ========== 导航抽屉 ========== */
.drawer-list {
  padding: 8px;
}

.drawer-list mdui-list-item {
  border-radius: 28px;
}

/* ========== Hero 区域（动态背景版） ========== */
.hero {
  position: relative;
  text-align: center;
  padding: 80px 24px 64px;
  overflow: hidden;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-bg {
  position: absolute;
  inset: -30px;
  background-image: url('../images/75dd2f157db090bbf61fbd5d9b9630aa279177455.jpg');
  background-size: cover;
  background-position: center;
  z-index: 0;
  will-change: transform;
  transition: transform 0.15s ease-out;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(1px);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.avatar-ring {
  display: inline-block;
  padding: 5px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgb(var(--mdui-color-primary)), rgb(var(--mdui-color-tertiary)));
  margin-bottom: 28px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  animation: avatar-float 4s ease-in-out infinite;
}

@keyframes avatar-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.avatar-ring mdui-avatar {
  --mdui-comp-avatar-width: 120px;
  --mdui-comp-avatar-height: 120px;
  font-size: 48px;
  border: 4px solid rgb(var(--mdui-color-surface));
}

.hero-name {
  font-size: 2.75rem;
  font-weight: 800;
  color: #fff;
  text-shadow: 0 2px 16px rgba(0,0,0,0.3);
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.hero .subtitle {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.9);
  margin-bottom: 20px;
  font-weight: 500;
}

.hero .bio {
  font-size: 1rem;
  color: rgba(255,255,255,0.78);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-actions a {
  text-decoration: none;
}

/* ========== 数据统计横幅 ========== */
.stats-banner {
  display: flex;
  justify-content: center;
  gap: 48px;
  padding: 36px 24px;
  background: rgb(var(--mdui-color-surface-container));
  border-top: 1px solid rgb(var(--mdui-color-outline-variant));
  border-bottom: 1px solid rgb(var(--mdui-color-outline-variant));
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: rgb(var(--mdui-color-primary));
  line-height: 1;
}

.stat-label {
  font-size: 0.8125rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-weight: 500;
}

/* ========== 区块标题（带图标） ========== */
.section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.section-icon {
  --mdui-icon-size: 28px;
  color: rgb(var(--mdui-color-primary));
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: rgb(var(--mdui-color-on-surface));
  margin-bottom: 0;
}

/* ========== 技能展示（网格版） ========== */
.skills-section {
  padding: var(--section-padding);
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.skill-category {
  padding: 24px;
  border-radius: 16px;
  background: rgb(var(--mdui-color-surface-container));
  border: 1px solid rgb(var(--mdui-color-outline-variant));
  transition: transform 0.2s, box-shadow 0.2s;
}

.skill-category:hover {
  transform: translateY(-2px);
  box-shadow: var(--mdui-elevation-level2);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.skill-category-header mdui-icon {
  --mdui-icon-size: 22px;
  color: rgb(var(--mdui-color-primary));
}

.skill-category-header h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: rgb(var(--mdui-color-on-surface));
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ========== 联系方式卡片 ========== */
.contact-section {
  padding: var(--section-padding);
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.contact-card {
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  border-radius: 16px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.contact-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--mdui-elevation-level2);
}

.contact-card mdui-icon {
  --mdui-icon-size: 28px;
  color: rgb(var(--mdui-color-primary));
}

.contact-info h3 {
  font-size: 0.8125rem;
  font-weight: 500;
  color: rgb(var(--mdui-color-on-surface-variant));
  margin-bottom: 2px;
}

.contact-info p {
  font-size: 1rem;
  color: rgb(var(--mdui-color-on-surface));
  font-weight: 500;
}

/* ========== 博客列表 ========== */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.post-card {
  padding: 24px;
  cursor: pointer;
  border-radius: 16px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.post-card:hover {
  transform: translateY(-2px);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  font-size: 0.8125rem;
  color: rgb(var(--mdui-color-on-surface-variant));
}

.post-category {
  background: rgb(var(--mdui-color-secondary-container));
  color: rgb(var(--mdui-color-on-secondary-container));
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

.post-card h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: rgb(var(--mdui-color-on-surface));
  margin-bottom: 8px;
  line-height: 1.4;
}

.post-card .summary {
  font-size: 0.9375rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.post-tags mdui-chip {
  --mdui-comp-chip-height: 26px;
  font-size: 0.75rem;
}

.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: rgb(var(--mdui-color-on-surface-variant));
}

.empty-state mdui-icon {
  --mdui-icon-size: 64px;
  margin-bottom: 16px;
  opacity: 0.4;
}

/* ========== 文章详情 ========== */
.post-header {
  margin-bottom: 32px;
}

.post-header .back-btn {
  margin-bottom: 16px;
}

.post-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: rgb(var(--mdui-color-on-surface));
  margin-bottom: 16px;
  line-height: 1.3;
}

.post-header-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: rgb(var(--mdui-color-on-surface-variant));
}

/* ========== 项目卡片网格 ========== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.project-card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border-radius: 16px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--mdui-elevation-level3);
}

.project-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: rgb(var(--mdui-color-surface-variant));
}

.project-card .project-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: rgb(var(--mdui-color-on-surface));
  margin-bottom: 8px;
}

.project-card .project-desc {
  font-size: 0.875rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.project-tech mdui-chip {
  --mdui-comp-chip-height: 26px;
  font-size: 0.75rem;
}

.project-actions {
  display: flex;
  gap: 8px;
}

.project-actions a {
  text-decoration: none;
}

/* ========== 页脚 ========== */
footer {
  text-align: center;
  padding: 28px 24px;
  font-size: 0.8125rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  border-top: 1px solid rgb(var(--mdui-color-outline-variant));
  margin-top: auto;
}

footer p {
  margin-bottom: 4px;
}

footer p:last-child {
  margin-bottom: 0;
}

footer a {
  color: rgb(var(--mdui-color-on-surface-variant));
  text-decoration: none;
}

footer a:hover {
  color: rgb(var(--mdui-color-primary));
  text-decoration: underline;
}

/* ========== 加载状态 ========== */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 64px;
}

/* ========== 页面入场动画 ========== */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content {
  animation: fade-up 0.6s ease-out;
}

.stats-banner {
  animation: fade-up 0.6s ease-out 0.1s both;
}

.skills-section {
  animation: fade-up 0.6s ease-out 0.2s both;
}

.contact-section {
  animation: fade-up 0.6s ease-out 0.3s both;
}

/* ========== 响应式 ========== */

/* 移动端 <600px */
@media (max-width: 599px) {
  .hero {
    padding: 56px 20px 48px;
    min-height: 480px;
  }

  .hero-bg {
    background-image: url('../images/65db2cdb6a31eb83e9a82c7b9ac3ac040985e6f7.jpg@1256w_2234h_!web-article-pic.webp');
  }

  .hero-name {
    font-size: 2rem;
  }

  .hero .subtitle {
    font-size: 1rem;
  }

  .stats-banner {
    gap: 24px;
    padding: 28px 16px;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* 平板 600-839px */
@media (min-width: 600px) and (max-width: 839px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 竖屏设备使用竖屏壁纸 */
@media (orientation: portrait) and (max-width: 839px) {
  .hero-bg {
    background-image: url('../images/65db2cdb6a31eb83e9a82c7b9ac3ac040985e6f7.jpg@1256w_2234h_!web-article-pic.webp');
  }
}

/* 移动端 + 平板 <840px：显示汉堡菜单，隐藏桌面导航 */
@media (max-width: 839px) {
  .menu-btn {
    display: inline-flex;
  }

  .nav-links {
    display: none;
  }
}

/* 桌面端 >=840px：显示桌面导航 */
@media (min-width: 840px) {
  .menu-btn {
    display: none;
  }

  .nav-links {
    display: flex;
  }

  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}