/* =============================================
   樱花视频 - 主样式文件
   Modern Minimal High-end Style
   ============================================= */

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

:root {
  --color-primary: #e8758a;
  --color-primary-light: #f5b8c4;
  --color-primary-dark: #c9556b;
  --color-accent: #f9d0d8;
  --color-bg: #fdfbfc;
  --color-bg-alt: #fef6f8;
  --color-text: #1a1a2e;
  --color-text-muted: #6b7280;
  --color-text-light: #9ca3af;
  --color-border: #f0e0e5;
  --color-white: #ffffff;
  --font-main: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --shadow-sm: 0 2px 12px rgba(232,117,138,0.08);
  --shadow-md: 0 8px 32px rgba(232,117,138,0.12);
  --shadow-lg: 0 16px 48px rgba(232,117,138,0.18);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--color-text);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 48px;
  font-weight: 400;
}

.section-header { text-align: center; margin-bottom: 56px; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
  font-family: var(--font-main);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(232,117,138,0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(232,117,138,0.45);
}

.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);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255,255,255,0.15);
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,0.4);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-2px);
}

/* --- Header / Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(253,251,252,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
}

.logo-text {
  font-size: 1.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

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

.main-nav a {
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-primary);
  background: var(--color-accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* --- Search Bar --- */
.search-bar-wrap {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

.search-bar-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.search-form {
  display: flex;
  align-items: center;
  flex: 1;
  max-width: 640px;
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: 50px;
  padding: 0 20px;
  gap: 10px;
  transition: var(--transition);
}

.search-form:focus-within {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(232,117,138,0.1);
}

.search-icon {
  color: var(--color-text-light);
  font-size: 1rem;
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.9rem;
  color: var(--color-text);
  font-family: var(--font-main);
  padding: 10px 0;
}

.search-input::placeholder { color: var(--color-text-light); }

.search-btn {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
  border: none;
  border-radius: 50px;
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-main);
  flex-shrink: 0;
}

.search-btn:hover { opacity: 0.9; transform: scale(1.02); }

.search-hot-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.search-hot-tags span { font-size: 0.8rem; color: var(--color-text-light); }

.hot-tag {
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: 50px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  cursor: pointer;
  transition: var(--transition);
}

.hot-tag:hover { background: var(--color-primary-light); color: var(--color-white); }

/* --- Hero Section --- */
.hero-section {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #fdf2f5 0%, #fce8ed 50%, #f8d7e3 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-banner.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(253,242,245,0.85) 0%, rgba(248,215,227,0.7) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--color-primary-light);
  border-radius: 50px;
  padding: 6px 16px;
  font-size: 0.8rem;
  color: var(--color-primary-dark);
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--color-text);
}

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

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  max-width: 560px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  position: absolute;
  bottom: 48px;
  right: 0;
  z-index: 2;
  display: flex;
  gap: 32px;
}

.hero-stat {
  text-align: center;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 28px;
}

.hero-stat-num {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 4px;
}

.hero-stat-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* --- Section Spacing --- */
.section-pad { padding: 96px 0; }
.section-pad-sm { padding: 64px 0; }

/* --- About Section --- */
.about-section { background: var(--color-white); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.about-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: 20px;
}

.about-desc {
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 32px;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.about-feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.1rem;
}

.about-feature-text h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.about-feature-text p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.about-image-wrap {
  position: relative;
}

.about-image-main {
  width: 100%;
  border-radius: var(--radius-xl);
  object-fit: cover;
  height: 480px;
  box-shadow: var(--shadow-lg);
}

.about-image-badge {
  position: absolute;
  bottom: 24px;
  left: -24px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 12px;
}

.about-image-badge-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
}

.about-image-badge-text strong {
  display: block;
  font-size: 1.1rem;
  color: var(--color-primary);
}

.about-image-badge-text span {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* --- Video Cards / Hot Topics --- */
.hot-section { background: var(--color-bg-alt); }

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

.video-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--color-accent);
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.video-card:hover .video-thumb img { transform: scale(1.05); }

.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: var(--transition);
  opacity: 0;
}

.video-card:hover .video-play-btn { opacity: 1; background: rgba(0,0,0,0.3); }

.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
}

.video-card:hover .play-icon { transform: scale(1); }

.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--color-primary);
  margin-left: 4px;
}

.video-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--color-primary);
  color: white;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 50px;
}

.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.65);
  color: white;
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: 4px;
}

.video-info { padding: 16px; }

.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--color-text-light);
}

.video-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* --- Categories Section --- */
.categories-section { background: var(--color-white); }

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.category-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1.5px solid var(--color-border);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  transform: scaleX(0);
  transition: var(--transition);
}

.category-card:hover::before { transform: scaleX(1); }

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
  background: var(--color-white);
}

.category-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  transition: var(--transition);
}

.category-card:hover .category-icon {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.category-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.category-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.category-count {
  font-size: 0.78rem;
  color: var(--color-primary);
  font-weight: 600;
}

/* --- Stats Section --- */
.stats-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.stat-item {
  background: rgba(255,255,255,0.08);
  padding: 48px 32px;
  text-align: center;
  transition: var(--transition);
}

.stat-item:hover { background: rgba(255,255,255,0.15); }

.stat-num {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* --- Reviews Section --- */
.reviews-section { background: var(--color-bg-alt); }

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

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

.review-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 14px;
  color: #fbbf24;
  font-size: 0.9rem;
}

.review-content {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.review-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.review-role {
  font-size: 0.78rem;
  color: var(--color-text-light);
}

/* --- FAQ Section --- */
.faq-section { background: var(--color-white); }

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  gap: 16px;
  background: var(--color-white);
  transition: var(--transition);
}

.faq-question:hover { background: var(--color-bg-alt); }

.faq-item.active .faq-question { color: var(--color-primary); background: var(--color-accent); }

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
  font-size: 1rem;
  color: var(--color-text-muted);
}

.faq-item.active .faq-icon {
  background: var(--color-primary);
  color: white;
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  background: var(--color-white);
}

.faq-item.active .faq-answer { display: block; }

/* --- Join Section --- */
.join-section {
  background: linear-gradient(135deg, #fdf2f5 0%, #fce8ed 100%);
}

.join-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.join-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: 16px;
}

.join-desc {
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 32px;
}

.join-benefits {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
}

.join-benefit {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
}

.join-benefit-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
}

.join-form {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.join-form h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.join-form p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 16px;
}

.form-input {
  width: 100%;
  padding: 13px 18px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  transition: var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(232,117,138,0.1);
  background: var(--color-white);
}

.form-input::placeholder { color: var(--color-text-light); }

.form-submit {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-main);
}

.form-submit:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(232,117,138,0.35);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.7);
}

.footer-top {
  padding: 72px 0 48px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand .logo-text { color: white; -webkit-text-fill-color: white; }
.footer-brand .logo-img { filter: brightness(0) invert(1); }

.footer-desc {
  font-size: 0.85rem;
  line-height: 1.8;
  margin: 16px 0 24px;
  opacity: 0.7;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: var(--transition);
  cursor: pointer;
}

.social-btn:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 0.9rem;
  color: white;
  margin-bottom: 20px;
  font-weight: 700;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.85rem;
  opacity: 0.65;
  transition: var(--transition);
}

.footer-links a:hover { opacity: 1; color: var(--color-primary-light); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  opacity: 0.55;
  flex-wrap: wrap;
  gap: 12px;
}

/* --- Mobile Menu --- */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* --- Breadcrumb --- */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.82rem;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { opacity: 0.4; }
.breadcrumb .current { color: var(--color-primary); }

/* --- Inner Page Hero --- */
.inner-hero {
  background: linear-gradient(135deg, #fdf2f5 0%, #fce8ed 100%);
  padding: 64px 0;
  text-align: center;
}

.inner-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 12px;
}

.inner-hero p {
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto;
}

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

.fade-in-up { animation: fadeInUp 0.6s ease forwards; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-image-wrap { order: -1; }
  .about-image-main { height: 360px; }
  .join-inner { grid-template-columns: 1fr; gap: 48px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { display: none; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .header-actions .btn { display: none; }
  .hero-section { min-height: 70vh; }
  .hero-title { font-size: 2rem; }
  .section-pad { padding: 64px 0; }
  .video-grid { grid-template-columns: 1fr 1fr; }
  .categories-grid { grid-template-columns: 1fr 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .search-hot-tags { display: none; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .video-grid { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-32 { margin-bottom: 32px; }
.hidden { display: none; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* --- Loading Skeleton --- */
.skeleton {
  background: linear-gradient(90deg, var(--color-border) 25%, var(--color-bg-alt) 50%, var(--color-border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- Scroll to top --- */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  border: none;
  font-size: 1rem;
  z-index: 999;
}

.scroll-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.scroll-top:hover { transform: translateY(-3px); background: var(--color-primary-dark); }

/* --- Inner page specific --- */
.page-content { padding: 64px 0; }

.content-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 120px;
}

.sidebar-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1.5px solid var(--color-border);
  margin-bottom: 24px;
}

.sidebar-card h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-list { display: flex; flex-direction: column; gap: 10px; }

.sidebar-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition);
  padding: 6px 0;
}

.sidebar-list-item:hover { color: var(--color-primary); }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  font-size: 0.78rem;
  padding: 5px 12px;
  border-radius: 50px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  cursor: pointer;
  transition: var(--transition);
}

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

@media (max-width: 768px) {
  .content-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}