/* ============================================
   OceanPhoto - 海蓝摄影主题样式
   ============================================ */

/* --- CSS 变量体系 --- */
:root {
  --color-primary: #006994;
  --color-accent: #00B4D8;
  --color-bg-dark: #0A1628;
  --color-bg-card: #1B3A4B;
  --color-text-primary: #E8F4F8;
  --color-text-secondary: #7EC8E3;

  --color-bg-surface: #0F2137;
  --color-border: rgba(126, 200, 227, 0.15);
  --color-hover: rgba(0, 180, 216, 0.1);
  --color-shadow: rgba(0, 0, 0, 0.4);
  --color-overlay: rgba(10, 22, 40, 0.7);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Consolas", monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 2px 8px var(--color-shadow);
  --shadow-md: 0 4px 20px var(--color-shadow);
  --shadow-lg: 0 8px 40px var(--color-shadow);

  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  --navbar-height: 64px;
  --container-max: 1400px;
  --waterfall-gap: 16px;
}

/* --- 基础重置 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-dark);
  color: var(--color-text-primary);
  line-height: 1.7;
  min-height: 100vh;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- 导航栏 --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: background var(--transition-normal);
}

.navbar-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-primary);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.navbar-brand:hover {
  color: var(--color-accent);
}

.navbar-logo {
  height: 32px;
  width: auto;
  border-radius: var(--radius-sm);
}

.navbar-title {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  color: var(--color-text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text-primary);
  background: var(--color-hover);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

/* --- 首页横幅 --- */
.hero-banner {
  position: relative;
  height: 70vh;
  min-height: 480px;
  max-height: 800px;
  margin-top: var(--navbar-height);
  background-size: cover;
  background-position: center;
  background-color: var(--color-bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(0, 105, 148, 0.3) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 180, 216, 0.2) 0%, transparent 60%);
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 22, 40, 0.3) 0%,
    rgba(10, 22, 40, 0.6) 50%,
    rgba(10, 22, 40, 0.95) 100%
  );
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: 0 24px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #E8F4F8 0%, #7EC8E3 50%, #00B4D8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
  animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  font-weight: 300;
  letter-spacing: 0.05em;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  animation: bounce 2s ease-in-out infinite;
}

/* --- 分类筛选栏 --- */
.filter-bar {
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: var(--navbar-height);
  z-index: 100;
}

.filter-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.filter-inner::-webkit-scrollbar {
  display: none;
}

.filter-item {
  white-space: nowrap;
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: rgba(126, 200, 227, 0.08);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.filter-item:hover {
  color: var(--color-text-primary);
  background: var(--color-hover);
  border-color: var(--color-accent);
}

.filter-item.active {
  color: var(--color-bg-dark);
  background: var(--color-accent);
  border-color: var(--color-accent);
  font-weight: 600;
}

/* --- 瀑布流 --- */
.waterfall-section {
  padding: 40px 0 80px;
}

.waterfall-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  column-gap: var(--waterfall-gap);
  column-count: 3;
}

.waterfall-grid[data-columns="2"] {
  column-count: 2;
}

.waterfall-grid[data-columns="4"] {
  column-count: 4;
}

/* --- 照片卡片 --- */
.photo-card {
  break-inside: avoid;
  margin-bottom: var(--waterfall-gap);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-card);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.photo-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.photo-card-link {
  display: block;
  color: inherit;
}

.photo-card-cover {
  position: relative;
  overflow: hidden;
}

.photo-card-cover img {
  width: 100%;
  display: block;
  transition: transform var(--transition-slow);
}

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

.photo-card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 105, 148, 0.0);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-normal);
}

.photo-card:hover .photo-card-overlay {
  opacity: 1;
  background: rgba(0, 105, 148, 0.4);
}

.photo-card-overlay svg {
  color: white;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
  transform: scale(0.5);
  transition: transform var(--transition-normal);
}

.photo-card:hover .photo-card-overlay svg {
  transform: scale(1);
}

.photo-card-info {
  padding: 16px 18px;
}

.photo-card-info.minimal {
  padding: 12px 16px;
}

.photo-card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.photo-card-info.detailed .photo-card-title {
  white-space: normal;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.photo-card-excerpt {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  margin-top: 6px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.photo-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.tag-pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-accent);
  background: rgba(0, 180, 216, 0.1);
  border: 1px solid rgba(0, 180, 216, 0.2);
  transition: all var(--transition-fast);
}

.tag-pill:hover {
  background: rgba(0, 180, 216, 0.2);
  border-color: var(--color-accent);
}

/* --- 分页 --- */
.pagination {
  max-width: var(--container-max);
  margin: 40px auto 0;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.page-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-primary);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.page-btn:hover {
  background: var(--color-hover);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.page-info {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  min-width: 60px;
  text-align: center;
}

/* --- 空状态 --- */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--color-text-secondary);
}

.empty-state svg {
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state p {
  font-size: 1rem;
}

/* --- 页面头部 --- */
.page-header {
  margin-top: var(--navbar-height);
  padding: 60px 0 40px;
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.page-desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.page-stats {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 8px;
}

/* --- 面包屑 --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

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

.breadcrumb .separator {
  opacity: 0.4;
}

/* --- 文章详情 --- */
.post-detail {
  margin-top: var(--navbar-height);
}

.post-cover {
  position: relative;
  width: 100%;
  max-height: 80vh;
  overflow: hidden;
}

.post-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-height: 80vh;
}

.post-cover-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 60px 0 40px;
  background: linear-gradient(
    to top,
    rgba(10, 22, 40, 0.95) 0%,
    rgba(10, 22, 40, 0.6) 50%,
    transparent 100%
  );
}

.post-cover-info {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.post-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.post-cover .post-title {
  font-size: 2.5rem;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.post-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.post-header-no-cover {
  padding: 60px 0 40px;
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
}

.post-content {
  padding: 40px 0;
}

.post-body {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-text-primary);
}

.post-body h1, .post-body h2, .post-body h3,
.post-body h4, .post-body h5, .post-body h6 {
  color: var(--color-text-primary);
  margin: 1.5em 0 0.8em;
  font-weight: 700;
  line-height: 1.4;
}

.post-body h1 { font-size: 1.8rem; }
.post-body h2 { font-size: 1.5rem; border-bottom: 1px solid var(--color-border); padding-bottom: 8px; }
.post-body h3 { font-size: 1.25rem; }
.post-body h4 { font-size: 1.1rem; }

.post-body p {
  margin: 1em 0;
}

.post-body img {
  border-radius: var(--radius-md);
  margin: 1.5em auto;
  cursor: zoom-in;
  box-shadow: var(--shadow-sm);
}

.post-body a {
  color: var(--color-accent);
  border-bottom: 1px solid rgba(0, 180, 216, 0.3);
  transition: border-color var(--transition-fast);
}

.post-body a:hover {
  border-bottom-color: var(--color-accent);
}

.post-body blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 12px 20px;
  margin: 1.5em 0;
  background: rgba(0, 180, 216, 0.05);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-secondary);
}

.post-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background: rgba(126, 200, 227, 0.1);
  color: var(--color-accent);
}

.post-body pre {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 1.5em 0;
}

.post-body pre code {
  background: none;
  padding: 0;
  color: var(--color-text-primary);
}

.post-body ul, .post-body ol {
  padding-left: 1.5em;
  margin: 1em 0;
}

.post-body li {
  margin: 0.4em 0;
}

.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
}

.post-body th, .post-body td {
  padding: 10px 16px;
  border: 1px solid var(--color-border);
  text-align: left;
}

.post-body th {
  background: var(--color-bg-surface);
  font-weight: 600;
}

/* --- 文章底部元数据 --- */
.post-footer-meta {
  max-width: 800px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.post-tags, .post-categories {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.post-tags svg, .post-categories svg {
  flex-shrink: 0;
  color: var(--color-text-secondary);
}

.category-pill {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-primary);
  background: rgba(0, 105, 148, 0.15);
  border: 1px solid rgba(0, 105, 148, 0.3);
  transition: all var(--transition-fast);
}

.category-pill:hover {
  background: rgba(0, 105, 148, 0.25);
  border-color: var(--color-primary);
}

/* --- 上下篇导航 --- */
.post-navigation {
  margin-top: 40px;
  padding: 30px 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-surface);
}

.post-nav-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.post-nav-item {
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.post-nav-item:hover {
  border-color: var(--color-accent);
  background: var(--color-hover);
}

.post-nav-item.empty {
  opacity: 0;
  pointer-events: none;
}

.post-nav-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-nav-item.next {
  text-align: right;
}

.post-nav-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --- 评论区 --- */
.post-comments {
  padding: 40px 0 60px;
}

.comment-section {
  max-width: 800px;
  margin: 0 auto;
}

.comment-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--color-text-primary);
}

/* --- 分类集合页 --- */
.categories-section {
  padding: 40px 0 80px;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.category-card {
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
  color: inherit;
}

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

.category-card-cover {
  height: 180px;
  overflow: hidden;
}

.category-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.category-card:hover .category-card-cover img {
  transform: scale(1.08);
}

.category-card-cover.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-bg-surface), var(--color-bg-card));
  color: var(--color-text-secondary);
}

.category-card-info {
  padding: 16px 20px;
}

.category-card-name {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.category-card-count {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
}

.category-card-desc {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 6px;
  line-height: 1.5;
}

/* --- 标签云 --- */
.tags-section {
  padding: 40px 0 80px;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  padding: 20px;
}

.tag-cloud-item {
  display: inline-block;
  padding: 8px 20px;
  border-radius: 100px;
  font-size: calc(0.85rem + min(var(--tag-size, 0) * 0.02rem, 0.4rem));
  font-weight: 500;
  color: var(--color-text-secondary);
  background: rgba(126, 200, 227, 0.08);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.tag-cloud-item:hover {
  color: var(--color-bg-dark);
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

/* --- 归档页 --- */
.archives-section {
  padding: 40px 0 80px;
}

.archive-year-group {
  margin-bottom: 40px;
}

.archive-year {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.archive-month {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 16px 0 10px;
}

.archive-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 20px;
  border-left: 2px solid var(--color-border);
}

.archive-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  color: inherit;
  transition: background var(--transition-fast);
}

.archive-item:hover {
  background: var(--color-hover);
}

.archive-item-cover {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}

.archive-item-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.archive-item-info {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.archive-item-date {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.archive-item-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

/* --- 独立页面 --- */
.page-detail {
  margin-top: var(--navbar-height);
}

.page-header-simple {
  padding: 60px 0 40px;
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
}

.page-header-simple .page-title {
  text-align: center;
}

.page-header-simple .page-meta {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 8px;
  display: flex;
  justify-content: center;
  gap: 16px;
}

.page-content {
  padding: 40px 0 60px;
}

.page-body {
  max-width: 800px;
  margin: 0 auto;
}

.page-body p, .page-body h1, .page-body h2, .page-body h3,
.page-body ul, .page-body ol, .page-body blockquote {
  /* 共享文章正文样式 */
}

/* --- 作者页 --- */
.author-profile {
  display: flex;
  align-items: center;
  gap: 24px;
}

.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-accent);
}

/* --- 错误页 --- */
.error-page {
  margin-top: var(--navbar-height);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--navbar-height));
}

.error-content {
  text-align: center;
  padding: 40px;
}

.error-wave {
  margin-bottom: 20px;
}

.error-code {
  font-size: 6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.error-message {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  margin: 16px 0 32px;
}

.error-back-btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 100px;
  background: var(--color-accent);
  color: var(--color-bg-dark);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.error-back-btn:hover {
  background: var(--color-primary);
  color: var(--color-text-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* --- 页脚 --- */
.site-footer {
  background: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 20px;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  background: rgba(126, 200, 227, 0.08);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.social-link:hover {
  color: var(--color-accent);
  background: var(--color-hover);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.footer-info {
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  line-height: 1.8;
}

.footer-text a {
  color: var(--color-text-secondary);
}

.footer-text a:hover {
  color: var(--color-accent);
}

.footer-icp a {
  color: var(--color-text-secondary);
}

.footer-icp a:hover {
  color: var(--color-accent);
}

.footer-powered a {
  color: var(--color-text-secondary);
}

.footer-powered a:hover {
  color: var(--color-accent);
}

/* --- 灯箱 --- */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-content img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 0 60px rgba(0, 180, 216, 0.15);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 16px;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  z-index: 10000;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  opacity: 1;
}

.lightbox-close {
  top: 16px;
  right: 16px;
  font-size: 2.5rem;
}

.lightbox-prev {
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next {
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-caption {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  color: white;
  font-size: 0.9rem;
  text-align: center;
  max-width: 80%;
}

/* --- 动画 --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .waterfall-grid[data-columns="4"] {
    column-count: 3;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .post-cover .post-title {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  :root {
    --navbar-height: 56px;
    --waterfall-gap: 12px;
  }

  .navbar-menu {
    display: none;
    position: absolute;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background: rgba(10, 22, 40, 0.98);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--color-border);
  }

  .navbar-menu.open {
    display: flex;
  }

  .navbar-toggle {
    display: flex;
  }

  .hero-banner {
    height: 50vh;
    min-height: 360px;
  }

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

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

  .waterfall-grid,
  .waterfall-grid[data-columns="3"],
  .waterfall-grid[data-columns="4"] {
    column-count: 2;
  }

  .filter-inner {
    padding: 10px 16px;
  }

  .post-nav-inner {
    grid-template-columns: 1fr;
  }

  .post-cover .post-title {
    font-size: 1.5rem;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .categories-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

@media (max-width: 480px) {
  .waterfall-grid,
  .waterfall-grid[data-columns="2"],
  .waterfall-grid[data-columns="3"],
  .waterfall-grid[data-columns="4"] {
    column-count: 1;
  }

  .hero-title {
    font-size: 1.6rem;
  }

  .photo-card-info {
    padding: 10px 14px;
  }

  .photo-card-title {
    font-size: 0.88rem;
  }

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

  .author-profile {
    flex-direction: column;
    text-align: center;
  }
}