/* ============================================================
   秋水伊人 (Qiu Shui Yi Ren) — 样式表
   移动端优先 · 简洁大气 · 高级感
   ============================================================ */

/* ── CSS 变量 ── */
:root {
  --color-bg: #ffffff;
  --color-text: #333333;
  --color-text-secondary: #888888;
  --color-text-muted: #aaaaaa;
  --color-border: #eeeeee;
  --color-accent: #333333;
  --color-accent-hover: #555555;
  --color-like: #e74c3c;
  --color-success: #2ecc71;
  --color-danger: #e74c3c;
  --color-warning: #f39c12;
  --color-info: #3498db;
  --color-danger-bg: #fdf0f0;
  --color-card-shadow: rgba(0, 0, 0, 0.06);

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --radius-sm: 4px;
  --radius: 8px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.10);

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  --header-height: 56px;
  --tag-nav-height: 48px;
  --container-max: 1200px;
  --column-gap: 12px;
}

/* ── Reset ── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 确保 hidden 属性不被 CSS 覆盖 */
[hidden] {
  display: none !important;
}

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

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  font-size: inherit;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-direction: row;
  height: var(--header-height);
  padding-top: var(--spacing-xs);
  padding-bottom: var(--spacing-xs);
}

.site-logo {
  display: inline-block;
  flex-shrink: 0;
}

.logo-img {
  display: block;
  max-width: 108px;
  height: auto;
}

.site-tagline {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  line-height: 1.4;
  text-align: right;
}

/* ── 搜索框 ── */
.search-box {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  background: #f5f5f5;
  border-radius: 8px;
  padding: 4px 10px;
  border: 1px solid transparent;
  transition: border-color 0.2s, background 0.2s;
}
.search-box:focus-within {
  border-color: var(--color-accent);
  background: #fff;
}
.search-icon {
  flex-shrink: 0;
}
.search-input {
  border: none;
  background: transparent;
  font-size: 0.8125rem;
  outline: none;
  width: 140px;
  color: var(--color-text);
}
.search-input::placeholder {
  color: #bbb;
}
.search-clear {
  background: none;
  border: none;
  font-size: 14px;
  color: #999;
  cursor: pointer;
  padding: 0 2px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.search-clear:hover {
  color: #e53e3e;
}
.search-status {
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding: 8px 0 4px;
}

/* 移动端搜索框适配 */
@media (max-width: 480px) {
  .search-input {
    width: 100px;
  }
  .search-box {
    padding: 4px 8px;
  }
}

/* ============================================================
   Tag Navigation
   ============================================================ */
.tag-nav {
  position: sticky;
  top: var(--header-height);
  z-index: 99;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.tag-scroll {
  display: flex;
  align-items: center;
  gap: 4px;
  height: var(--tag-nav-height);
  overflow-x: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  white-space: nowrap;
  padding-top: var(--spacing-xs);
  padding-bottom: var(--spacing-xs);
}
.tag-scroll::-webkit-scrollbar {
  display: none;
}
.tag-hidden { display: none !important; }

.tag-btn {
  flex-shrink: 0;
  padding: 3px 9px;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-radius: 9999px;
  transition: all 0.2s ease;
  line-height: 1.4;
  letter-spacing: 0.02em;
  cursor: pointer;
  font-family: inherit;
}

.tag-btn:hover {
  color: var(--color-accent);
  background: #f5f5f5;
}

.tag-btn.active {
  color: #fff;
  background: var(--color-accent);
  font-weight: 500;
}
.tag-count {
  font-size: 0.625rem;
  color: #999;
  margin-left: 1px;
  font-weight: 400;
}
.tag-btn.active .tag-count {
  color: rgba(255,255,255,0.7);
}

/* 全部城市按钮 */
.tag-expand {
  display: inline-flex !important;
  align-items: center;
  gap: 3px;
  color: var(--color-accent) !important;
  font-weight: 500;
  flex-shrink: 0;
  padding: 3px 9px;
  font-size: 0.75rem;
}
.tag-expand.active {
  color: #fff !important;
  background: var(--color-accent) !important;
}
.tag-expand:hover {
  background: #f0f0f0;
}
.tag-dots {
  display: inline-flex;
  align-items: center;
  color: var(--color-text-muted);
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 3px 2px;
  flex-shrink: 0;
  font-size: 0.75rem;
}

/* 城市展开面板 */
.tag-panel {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  max-height: 600px;
  overflow: hidden;
  opacity: 1;
  transition: max-height 0.35s ease, opacity 0.25s ease, box-shadow 0.35s ease;
}
.tag-panel.collapsed {
  max-height: 0;
  opacity: 0;
  box-shadow: none;
  border-bottom: none;
}
.tag-panel-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 0;
}

/* ============================================================
   Waterfall Layout
   ============================================================ */
.site-main {
  flex: 1;
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-2xl);
}

.waterfall {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--column-gap);
}

/* ============================================================
   Card
   ============================================================ */
.card {
  break-inside: avoid;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:active {
  transform: scale(0.98);
}

.card-link {
  display: block;
}

/* ── Card Media ── */
.card-media {
  position: relative;
  overflow: hidden;
  background: #f0f0f0;
  aspect-ratio: 4 / 5;
}

.card-img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: transform 0.3s ease, filter 0.5s ease;
  background: #f0f0f0;
  filter: blur(8px);
  transform: scale(1.02);
}
.card-img.loaded {
  filter: blur(0);
  transform: scale(1);
}

.card-video-badge {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  pointer-events: none;
}

.card-img-placeholder {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
}

.placeholder-text {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}

/* ── Card Body ── */
.card-body {
  padding: 10px 12px 12px;
}

.card-tag-row {
  margin-bottom: 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-tag {
  display: inline-block;
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.card-title {
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 6px;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.6875rem;
  color: var(--color-text-muted);
}

.card-likes {
  color: var(--color-like);
}

.card-date {
  color: var(--color-text-muted);
  font-size: 0.6875rem;
}

/* ============================================================
   Empty State
   ============================================================ */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.empty-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.empty-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* ============================================================
   Loader
   ============================================================ */
.loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) 0;
}

.loader-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loader-text {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ============================================================
   End Marker
   ============================================================ */
.end-marker {
  text-align: center;
  padding: var(--spacing-lg) 0;
}

.end-text {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  text-align: center;
}

.footer-brand {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-xs);
}

.footer-copy {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
}

/* ============================================================
   Shared Components (breadcrumb, tags, buttons)
   ============================================================ */

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  list-style: none;
  padding: 0 0 var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin: 0 6px;
  color: var(--color-border);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

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

.breadcrumb .current {
  color: var(--color-text);
  font-weight: 500;
}

/* ── Tag ── */
.tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  background: #f5f5f5;
  color: var(--color-text-secondary);
  transition: background 0.2s, color 0.2s;
}

.tag:hover {
  background: var(--color-accent);
  color: #fff;
}

.tag--city {
  background: #f0f0f0;
  color: var(--color-accent);
  font-weight: 500;
}

/* ── Like Button ── */
.btn-like {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  font-family: var(--font-family);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.btn-like:hover {
  border-color: var(--color-like);
  color: var(--color-like);
}

.btn-like[data-liked="true"] {
  border-color: var(--color-like);
  color: var(--color-like);
  background: #fff5f5;
}

.btn-like .heart-icon {
  display: inline-block;
  font-size: 1.1rem;
  line-height: 1;
}

/* ============================================================
   Responsive — Tablet (≥ 640px)
   ============================================================ */
@media (min-width: 640px) {
  :root {
    --column-gap: 16px;
    --header-height: 64px;
  }

  .site-tagline {
    font-size: 0.75rem;
  }

  .card-body {
    padding: 12px 14px 14px;
  }

  .card-title {
    font-size: 0.9375rem;
  }
}

/* ============================================================
   Responsive — Medium Desktop (≥ 900px) → 3 列
   ============================================================ */
@media (min-width: 900px) {
  .waterfall {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================================
   Responsive — Desktop (≥ 1200px) → 4 列
   ============================================================ */
@media (min-width: 1200px) {
  :root {
    --column-gap: 20px;
    --header-height: 72px;
  }

  .waterfall {
    grid-template-columns: repeat(4, 1fr);
  }

  .card {
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
  }

  .card-img {
    transition: transform 0.4s ease;
  }

  .card:hover .card-img {
    transform: scale(1.03);
  }

  .card-body {
    padding: 14px 16px 16px;
  }

  .card-title {
    font-size: 1rem;
  }

  /* 相关推荐桌面端4列 */
  .related-waterfall {
    grid-template-columns: repeat(4, 1fr) !important;
  }
}

/* ============================================================
   帖子详情 — 结构化信息表格
   ============================================================ */
.intro {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: #fafafa;
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: var(--spacing-lg) 0;
}

.info-item {
  display: flex;
  background: #fff;
  padding: 12px 14px;
}

.info-item .label {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  min-width: 48px;
  flex-shrink: 0;
}

.info-item .value {
  color: var(--color-text);
  font-size: 0.92rem;
  font-weight: 500;
}

.desc {
  line-height: 1.85;
  color: var(--color-text);
  margin-top: var(--spacing-lg);
}

@media (max-width: 480px) {
  .info-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   搜索栏行（城市标签下方）
   ============================================================ */
.search-bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px var(--spacing-md) 4px;
  border-bottom: 1px solid var(--color-border);
}
.search-bar-row .search-box {
  margin-left: 0;
  flex: 1;
  max-width: 360px;
}
.search-bar-row .search-status {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ============================================================
   详情页导航（顶部返回 + 上一个/下一个）
   ============================================================ */
.post-nav-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #f0f0f0;
}
.nav-back {
  font-size: 0.9rem;
  color: #2563eb;
  text-decoration: none;
  font-weight: 500;
}
.nav-back:hover {
  text-decoration: underline;
}
.nav-prevnext-top {
  display: flex;
  gap: 12px;
}
.nav-arrow {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 6px;
  background: #f5f5f5;
  transition: all 0.2s;
}
.nav-arrow:hover {
  background: #e5e5e5;
  color: var(--color-text);
}

/* ============================================================
   详情页底部 上一个/下一个
   ============================================================ */
.post-nav-bottom {
  display: flex;
  gap: 12px;
  margin: 32px 0 24px;
  border-top: 1px solid #f0f0f0;
  padding-top: 24px;
}
.nav-bottom-link {
  flex: 1;
  padding: 14px 16px;
  background: #f8f8f8;
  border-radius: 10px;
  text-decoration: none;
  transition: background 0.2s;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.nav-bottom-link:hover {
  background: #f0f0f0;
}
.nav-bottom-prev {
  text-align: left;
}
.nav-bottom-next {
  text-align: right;
}
.nav-bottom-disabled {
  opacity: 0.4;
  cursor: default;
}
.nav-bottom-label {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}
.nav-bottom-title {
  font-size: 0.85rem;
  color: var(--color-text);
  font-weight: 500;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   卡片编号（在标签行中）
   ============================================================ */
.card-tag-row .card-num {
  position: static;
  display: inline;
  font-size: 0.7rem;
  color: #e53e3e;
  font-weight: 700;
  margin-left: 6px;
  background: none;
  padding: 0;
  border-radius: 0;
  letter-spacing: 0.03em;
}

/* ============================================================
   简介（原始文本）
   ============================================================ */
.raw-text-section {
  margin: 32px 0 24px;
  border-top: 1px solid #f0f0f0;
  padding-top: 24px;
}
.raw-text-heading {
  font-size: 1rem;
  font-weight: 700;
  color: #1a1a1e;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}
.raw-text-content {
  font-size: 0.92rem;
  line-height: 1.9;
  color: #5a5a5c;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ============================================================
   分页导航
   ============================================================ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 32px 16px 48px;
  flex-wrap: wrap;
}

.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  background: #fff;
  color: #555;
  font-size: 0.88rem;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}
.page-btn:hover {
  border-color: #999;
  color: #222;
  background: #f9f9f9;
}
.page-btn.active {
  background: #1a1a1e;
  color: #fff;
  border-color: #1a1a1e;
  font-weight: 600;
}
.page-btn.disabled {
  color: #ccc;
  border-color: #eee;
  cursor: not-allowed;
  pointer-events: none;
}
.page-prev, .page-next {
  font-size: 1.1rem;
  font-weight: 600;
}
.page-ellipsis {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: #aaa;
  font-size: 0.9rem;
  user-select: none;
}

/* 跳转 */
.page-jump {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 12px;
}
.page-jump-label {
  font-size: 0.82rem;
  color: #999;
}
.page-jump-input {
  width: 52px;
  height: 34px;
  border: 1px solid #ddd;
  border-radius: 6px;
  text-align: center;
  font-size: 0.85rem;
  color: #333;
  outline: none;
  -moz-appearance: textfield;
}
.page-jump-input::-webkit-outer-spin-button,
.page-jump-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.page-jump-input:focus {
  border-color: #999;
}
.page-jump-btn {
  min-width: 42px;
  height: 34px;
  padding: 0 8px;
  font-size: 0.8rem;
  font-weight: 600;
  background: #f5f5f5;
  border: 1px solid #ddd;
  border-radius: 6px;
  color: #555;
  cursor: pointer;
}
.page-jump-btn:hover {
  background: #1a1a1e;
  color: #fff;
  border-color: #1a1a1e;
}

.page-total {
  font-size: 0.82rem;
  color: #888;
  white-space: nowrap;
  margin-left: 4px;
}

/* 移动端紧凑：单行排列，保留跳转 */
@media (max-width: 640px) {
  .pagination {
    gap: 2px;
    padding: 24px 4px 36px;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    justify-content: center;
  }
  .page-btn {
    min-width: 28px;
    height: 28px;
    font-size: 0.72rem;
    padding: 0 5px;
    border-radius: 4px;
  }
  .page-prev, .page-next {
    font-size: 0.85rem;
    min-width: 28px;
  }
  .page-ellipsis {
    width: 22px;
    height: 28px;
    font-size: 0.7rem;
    min-width: auto;
  }
  .page-jump {
    margin-left: 4px;
    gap: 2px;
  }
  .page-jump-label {
    font-size: 0.68rem;
  }
  .page-jump-input {
    width: 34px;
    height: 26px;
    font-size: 0.72rem;
    border-radius: 4px;
  }
  .page-jump-btn {
    min-width: 28px;
    height: 26px;
    font-size: 0.68rem;
    padding: 0 5px;
    border-radius: 4px;
  }
  .page-total {
    display: none !important;
  }
}