:root {
  --bg: #ffffff;
  --fg: #111111;
  --accent: #222222;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --muted: #666666;
}

:root[data-theme="dark"] {
  --bg: #050509;
  --fg: #f5f5f5;
  --accent: #f5f5f5;
  --border-subtle: rgba(255, 255, 255, 0.12);
  --muted: #aaaaaa;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 5vw;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

:root[data-theme="dark"] .site-header {
  background: rgba(5, 5, 9, 0.9);
}

.logo {
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.main-nav a {
  position: relative;
  padding-bottom: 0.25rem;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.25s ease;
}

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

#toggle-container {
  margin-left: 1.5rem;
}

.global-toggle {
  width: 40px;
  height: 22px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: transparent;
  display: inline-flex;
  align-items: center;
  padding: 2px;
  cursor: pointer;
  position: relative;
}

.global-toggle .toggle-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateX(0);
  transition: transform 0.25s ease;
}

:root[data-theme="dark"] .global-toggle .toggle-dot {
  transform: translateX(16px);
}

.welcome-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10vh 5vw;
  /* 首页背景图：占位图在 images/home-hero-bg.svg，你可替换为同名文件或改成 .jpg 并同步修改这里 */
  background-image: url("../images/home-hero-bg.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.welcome-hero {
  text-align: center;
}

.welcome-title {
  font-size: clamp(3rem, 10vw, 6rem);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  display: inline-flex;
  gap: 0.1em;
}

.welcome-title span {
  display: inline-block;
}

.site-footer {
  padding: 1.5rem 5vw 2rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.back-to-top {
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

/* 通用页面布局 */
.page {
  flex: 1;
  padding: 6vh 5vw 8vh;
  max-width: 1120px;
  margin: 0 auto;
}

.page-title {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.85rem;
  margin-bottom: 2.5rem;
}

.page-section-title {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.page-muted {
  color: var(--muted);
  font-size: 0.9rem;
}

/* Project 详情页布局（参考 Projects 视觉风格） */
.project-detail-header {
  margin-bottom: 2rem;
}

.project-detail-title {
  font-size: 1.6rem;
  margin: 0 0 0.75rem;
}

.project-detail-meta {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.project-detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 2.3fr) minmax(0, 1fr);
  gap: 3rem;
  margin-top: 2.5rem;
}

.project-detail-main {
  min-width: 0;
}

.project-detail-breadcrumb {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.project-detail-breadcrumb span {
  margin: 0 0.4rem;
}

.project-detail-hero {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  margin-bottom: 1.5rem;
}

.project-detail-hero img {
  display: block;
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.project-detail-hero figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.project-detail-section-title {
  font-size: 1rem;
  margin: 1.75rem 0 0.75rem;
}

.project-detail-text {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--muted);
}

.project-detail-text p {
  margin: 0 0 1rem;
}

.project-detail-designer {
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  padding: 1.25rem 1.5rem;
  font-size: 0.9rem;
}

.project-detail-designer-name {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.project-detail-designer-title {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.project-detail-sidebar {
  align-self: flex-start;
}

.project-detail-sidebar-block + .project-detail-sidebar-block {
  margin-top: 1.5rem;
}

.project-detail-sidebar-title {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin-bottom: 0.75rem;
}

.project-detail-sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.9rem;
}

.project-detail-sidebar-list li + li {
  margin-top: 0.4rem;
}

.project-detail-sidebar-text {
  font-size: 0.85rem;
  color: var(--muted);
}

/* Projects 页面产品图网格 */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

/* Projects 分页 */
.projects-pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2.5rem;
  font-size: 0.85rem;
}

.projects-page-btn {
  min-width: 32px;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: transparent;
  cursor: pointer;
}

.projects-page-btn[aria-current="page"] {
  background: var(--accent);
  color: var(--bg);
}

.projects-page-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.project-card {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.9);
}

:root[data-theme="dark"] .project-card {
  background: rgba(10, 10, 14, 0.95);
}

.project-card img {
  display: block;
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.project-card-body {
  padding: 0.85rem 1rem 1rem;
}

.project-card-title {
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}

.project-card-meta {
  font-size: 0.8rem;
  color: var(--muted);
}

@media (max-width: 768px) {
  .site-header {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .main-nav {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .site-footer {
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }

  .projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .project-detail-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .project-detail-hero img {
    height: auto;
  }
}

@media (max-width: 520px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .page {
    padding: 4vh 5vw 6vh;
  }

  .project-detail-title {
    font-size: 1.3rem;
  }

  .project-detail-header {
    margin-bottom: 1.25rem;
  }
}