/* styles.css — 中医医院案例集 */

/* === CSS Variables === */
:root {
  --color-primary: #8B7355;
  --color-primary-light: #a69274;
  --color-secondary: #6B8F5E;
  --color-bg: #FAF7F2;
  --color-bg-alt: #F0EBE3;
  --color-text: #333;
  --color-text-light: #666;
  --color-text-muted: #999;
  --color-tag-condition: #F5A623;
  --color-tag-treatment: #6B8F5E;
  --color-tag-effect: #D4437C;
  --color-border: #E8E0D4;
  --color-white: #FFFFFF;
  --color-gray-100: #F5F5F5;
  --color-gray-200: #EEEEEE;
  --color-gray-400: #CCCCCC;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'SimSun', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* === App Container === */
#app {
  min-height: 100vh;
}

/* === Page wrapper (each page uses this) === */
.page {
  min-height: 100vh;
  padding: 20px;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === Container === */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

/* === Typography === */
h1 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
}

h3 {
  font-size: 1rem;
  font-weight: 600;
}

p {
  color: var(--color-text-light);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-light);
  padding: 8px 16px;
}

.btn-ghost:hover {
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* === Tags === */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-white);
}

.tag-condition { background: var(--color-tag-condition); }
.tag-treatment { background: var(--color-tag-treatment); }
.tag-effect { background: var(--color-tag-effect); }

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

.breadcrumb a {
  color: var(--color-text-light);
  text-decoration: none;
  cursor: pointer;
}

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

.breadcrumb-sep {
  color: var(--color-gray-400);
}

/* === Page Header (with back button) === */
.page-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.page-header h2 {
  flex: 1;
}

/* === Responsive === */
@media (max-width: 768px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  .page { padding: 16px 12px; }
}

/* === Cover Page === */
.page-cover {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  position: relative;
  overflow: hidden;
}

.cover-container {
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 40px 20px;
}

.cover-decoration {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.cover-circle {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 115, 85, 0.08) 0%, transparent 70%);
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
}

.cover-circle-2 {
  width: 600px;
  height: 600px;
  top: auto;
  bottom: -20%;
  left: 30%;
  background: radial-gradient(circle, rgba(107, 143, 94, 0.06) 0%, transparent 70%);
}

.cover-title {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--color-primary);
  letter-spacing: 0.1em;
  line-height: 1.4;
}

.cover-title-sub {
  font-size: 2.2rem;
  margin-top: 8px;
  color: var(--color-text);
}

.cover-subtitle {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-top: 16px;
  letter-spacing: 0.15em;
}

.btn-start {
  margin-top: 40px;
  padding: 14px 40px;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

@media (max-width: 768px) {
  .cover-title { font-size: 2rem; }
  .cover-title-sub { font-size: 1.5rem; }
  .cover-circle { width: 250px; height: 250px; }
  .cover-circle-2 { width: 400px; height: 400px; }
}

/* === TOC Page === */
.page-toc {
  padding-top: 60px;
}

.toc-header {
  text-align: center;
  margin-bottom: 48px;
}

.toc-subtitle {
  margin-top: 8px;
  font-size: 1rem;
  color: var(--color-text-muted);
}

.toc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 700px;
  margin: 0 auto;
}

.toc-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
  border: 2px solid transparent;
  box-shadow: var(--shadow-sm);
}

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

.toc-card-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.toc-card-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.toc-card-count {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.toc-card-desc {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

@media (max-width: 600px) {
  .toc-grid { grid-template-columns: 1fr; }
}

/* === Grid Page === */
.page-grid {
  padding-top: 40px;
}

.grid-header {
  margin-bottom: 24px;
}

.grid-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.grid-filter {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 6px 16px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-white);
  color: var(--color-text-light);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-sans);
}

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

.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
  aspect-ratio: 4 / 5;
  display: flex;
  flex-direction: column;
}

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

.grid-card-image {
  flex: 0 0 65%;
  overflow: hidden;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.grid-card-image.is-video {
  background: #2a2a2a;
}

.grid-card-image.no-image .video-play-overlay {
  background: transparent;
}

.grid-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.grid-card-image .placeholder {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.grid-card-image .placeholder.has-video-bg {
  font-size: 2.5rem;
  color: rgba(255, 255, 255, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: #2a2a2a;
}

.grid-card-info {
  flex: 1;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.grid-card-title {
  font-size: 0.9rem;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.grid-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

@media (max-width: 900px) {
  .grid-cards { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 500px) {
  .grid-cards { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}

.btn-fullscreen {
  margin-top: 16px;
  font-size: 0.85rem;
}

/* === Media Viewer Overlay === */
.media-viewer-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.media-viewer-header {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 1001;
}

.btn-viewer-close {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.btn-viewer-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

.media-viewer-content {
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.media-viewer-content img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 8px;
}

.media-viewer-content video {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: 8px;
}

/* Video indicator on grid cards */
.video-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
  z-index: 1;
  pointer-events: none;
}

.grid-card-image.is-video .video-play-overlay {
  background: rgba(0, 0, 0, 0.5);
}

.grid-card-image.is-video.no-image .video-play-overlay {
  background: transparent;
}

.video-play-btn svg {
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.5));
  transition: transform 0.2s ease;
  opacity: 0.95;
}

.grid-card:hover .video-play-overlay {
  background: rgba(0, 0, 0, 0.6);
}

.grid-card:hover .video-play-btn svg {
  transform: scale(1.1);
  opacity: 1;
}