:root {
  --yy-primary: #dc2626;
  --yy-accent: #fb923c;
  --yy-bg: #141013;
  --yy-text: #fef2f2;
  --yy-card-bg: #1f1a1f;
  --yy-radius-lg: 24px;
  --yy-radius-md: 18px;
  --yy-radius-sm: 12px;
  --yy-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  --yy-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background-color: var(--yy-bg);
  color: var(--yy-text);
  font-family: var(--yy-font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* Navbar */
.navbar {
  background: rgba(20, 16, 19, 0.9) !important;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(251, 146, 60, 0.2);
  padding: 1rem 0;
}
.navbar-brand {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: var(--yy-text) !important;
}
.navbar-brand i { color: var(--yy-primary); margin-right: 8px; }
.navbar-toggler { border-color: var(--yy-accent); }
.navbar-toggler-icon { filter: invert(0.8); }
.navbar-nav .nav-link {
  color: rgba(254, 242, 242, 0.8);
  font-weight: 500;
  margin: 0 0.8rem;
  position: relative;
  transition: color 0.3s;
}
.navbar-nav .nav-link:hover, .navbar-nav .nav-link.active { color: var(--yy-accent); }
.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--yy-accent);
  transition: width 0.3s ease;
}
.navbar-nav .nav-link:hover::after { width: 100%; }

/* Hero */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(135deg, #1a0a0a 0%, #2d1515 40%, #141013 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('{随机图片}') center/cover no-repeat;
  opacity: 0.35;
  animation: heroFade 1.2s ease-out;
}
@keyframes heroFade { from { opacity: 0; transform: scale(1.05); } to { opacity: 0.35; transform: scale(1); } }
.hero-content { position: relative; z-index: 2; padding: 2rem; max-width: 850px; }
.hero-content h1 {
  font-size: clamp(3rem, 8vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--yy-text);
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
  margin-bottom: 1rem;
}
.hero-content h1 .brand-accent { color: var(--yy-primary); }
.hero-sub {
  font-size: 1.3rem;
  font-weight: 300;
  color: rgba(254, 242, 242, 0.9);
  margin-bottom: 2rem;
  text-shadow: 0 2px 10px rgba(0,0,0,0.4);
}
.hero-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--yy-primary), var(--yy-accent));
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  border: none;
  transition: all 0.4s ease;
  box-shadow: 0 8px 30px rgba(220, 38, 38, 0.4);
  position: relative;
  overflow: hidden;
}
.hero-btn::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s;
}
.hero-btn:hover::before { left: 100%; }
.hero-btn:hover { transform: translateY(-3px); box-shadow: 0 15px 40px rgba(251, 146, 60, 0.5); }

/* Section common */
.section { padding: 5rem 0; }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 3rem;
}
.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  position: relative;
  display: flex;
  align-items: center;
  gap: 15px;
}
.section-title i {
  color: var(--yy-primary);
  font-size: 2rem;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px; left: 0;
  width: 60px; height: 4px;
  background: linear-gradient(90deg, var(--yy-primary), var(--yy-accent));
  border-radius: 4px;
}
.section-more {
  color: var(--yy-accent);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: gap 0.3s;
}
.section-more:hover { gap: 10px; }

/* Category sidebar + poster wall */
.category-layout { display: grid; grid-template-columns: 240px 1fr; gap: 2.5rem; }
.category-sidebar {
  position: sticky;
  top: 100px;
  align-self: start;
  background: var(--yy-card-bg);
  border-radius: var(--yy-radius-lg);
  padding: 1.5rem;
  box-shadow: var(--yy-shadow);
}
.category-sidebar h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  color: var(--yy-accent);
  display: flex;
  align-items: center;
  gap: 8px;
}
.category-list { list-style: none; }
.category-list li { margin-bottom: 0.4rem; }
.category-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.7rem 1rem;
  border-radius: var(--yy-radius-md);
  font-weight: 500;
  color: rgba(254, 242, 242, 0.8);
  transition: all 0.3s;
}
.category-list a:hover, .category-list a.active {
  background: rgba(220, 38, 38, 0.2);
  color: var(--yy-text);
  transform: translateX(5px);
}
.category-list a i { width: 20px; color: var(--yy-accent); }

/* Poster wall grid */
.poster-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.8rem;
}
.movie-card {
  background: var(--yy-card-bg);
  border-radius: var(--yy-radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  position: relative;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.movie-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 20px 50px rgba(220, 38, 38, 0.3);
}
.movie-poster {
  position: relative;
  aspect-ratio: 2/3;
  overflow: hidden;
}
.movie-poster img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
  opacity: 0;
  animation: fadeIn 0.6s ease forwards;
}
@keyframes fadeIn { to { opacity: 1; } }
.movie-card:hover .movie-poster img { transform: scale(1.1); }
.movie-badge {
  position: absolute;
  top: 12px; left: 12px;
  background: linear-gradient(135deg, var(--yy-primary), #a11);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.35rem 0.8rem;
  border-radius: 20px;
  letter-spacing: 0.5px;
  z-index: 2;
  box-shadow: 0 4px 15px rgba(220, 38, 38, 0.4);
}
.movie-rating {
  position: absolute;
  top: 12px; right: 12px;
  background: rgba(0, 0, 0, 0.7);
  color: #fbbf24;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.3rem 0.7rem;
  border-radius: 20px;
  backdrop-filter: blur(5px);
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 4px;
}
.movie-info { padding: 1rem 0.8rem 1.2rem; }
.movie-title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.3rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.movie-meta {
  font-size: 0.8rem;
  color: rgba(254, 242, 242, 0.6);
  display: flex;
  align-items: center;
  gap: 8px;
}
.movie-meta .type-tag {
  background: rgba(251, 146, 60, 0.15);
  color: var(--yy-accent);
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
  font-weight: 500;
  font-size: 0.7rem;
}

/* Ranking section */
.ranking-section { background: #1a141a; border-radius: var(--yy-radius-lg); padding: 3rem; }
.ranking-list { list-style: none; counter-reset: rank; }
.ranking-list li {
  counter-increment: rank;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 1rem 1.5rem;
  border-radius: var(--yy-radius-md);
  transition: background 0.3s;
  margin-bottom: 0.5rem;
}
.ranking-list li:hover { background: rgba(220, 38, 38, 0.1); }
.ranking-list li::before {
  content: counter(rank);
  font-family: 'Courier New', monospace;
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--yy-primary);
  width: 2.5rem;
  text-align: center;
}
.ranking-list li:first-child::before { color: var(--yy-accent); }
.ranking-info { flex: 1; }
.ranking-title { font-weight: 600; font-size: 1.1rem; }
.ranking-sub { font-size: 0.85rem; color: rgba(254, 242, 242, 0.5); }
.ranking-num {
  font-family: 'Courier New', monospace;
  font-weight: 700;
  color: var(--yy-accent);
  font-size: 1.1rem;
}

/* Accordion (FAQ) */
.accordion-item {
  background: var(--yy-card-bg);
  border: 1px solid rgba(255, 255, 255, 0.08) !important;
  border-radius: var(--yy-radius-md) !important;
  margin-bottom: 1rem;
  overflow: hidden;
}
.accordion-header { background: transparent; }
.accordion-button {
  background: transparent;
  color: var(--yy-text);
  font-weight: 600;
  padding: 1.2rem 1.5rem;
  font-size: 1.1rem;
}
.accordion-button:not(.collapsed) {
  background: rgba(220, 38, 38, 0.15);
  color: var(--yy-accent);
}
.accordion-button:focus { box-shadow: none; }
.accordion-body { padding: 1.5rem; color: rgba(254, 242, 242, 0.8); }

/* Feature icons list */
.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}
.feature-item {
  background: var(--yy-card-bg);
  border-radius: var(--yy-radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all 0.4s;
  border: 1px solid rgba(255,255,255,0.05);
}
.feature-item:hover { transform: translateY(-8px); background: rgba(220, 38, 38, 0.1); }
.feature-icon {
  font-size: 2.8rem;
  margin-bottom: 1.2rem;
  display: inline-block;
  background: linear-gradient(135deg, var(--yy-primary), var(--yy-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.feature-item h4 { font-weight: 700; font-size: 1.2rem; margin-bottom: 0.5rem; }
.feature-item p { font-size: 0.9rem; color: rgba(254, 242, 242, 0.7); }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Modal */
.modal-movie {
  position: fixed;
  inset: 0;
  z-index: 1050;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal-movie.active { display: flex; }
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
}
.modal-content {
  position: relative;
  background: var(--yy-card-bg);
  border-radius: var(--yy-radius-lg);
  max-width: 650px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 2.5rem;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7);
  border: 1px solid rgba(255,255,255,0.1);
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.4s;
}
.modal-movie.active .modal-content {
  transform: translateY(0);
  opacity: 1;
}
.modal-close {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  background: none;
  border: none;
  font-size: 1.8rem;
  color: rgba(254, 242, 242, 0.7);
  cursor: pointer;
  transition: color 0.3s;
  z-index: 5;
}
.modal-close:hover { color: var(--yy-primary); }
.modal-movie-poster {
  width: 120px;
  height: 180px;
  border-radius: var(--yy-radius-md);
  overflow: hidden;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 30px rgba(0,0,0,0.5);
}
.modal-movie-poster img { width: 100%; height: 100%; object-fit: cover; }
.modal-movie-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.modal-movie-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9rem;
  color: rgba(254, 242, 242, 0.7);
  margin-bottom: 1rem;
}
.modal-movie-rating {
  color: #fbbf24;
  font-weight: 700;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 1rem;
}
.modal-movie-plot {
  color: rgba(254, 242, 242, 0.85);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}
.modal-movie-detail {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
}
.modal-detail-item .label {
  font-size: 0.8rem;
  color: var(--yy-accent);
  font-weight: 600;
  margin-bottom: 0.2rem;
}
.modal-detail-item .value {
  font-weight: 500;
}

/* Mood picker */
.mood-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
}
.mood-tag {
  background: var(--yy-card-bg);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 50px;
  padding: 0.8rem 1.8rem;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}
.mood-tag:hover, .mood-tag.active {
  background: linear-gradient(135deg, var(--yy-primary), var(--yy-accent));
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(220, 38, 38, 0.3);
}
.mood-tag i { font-size: 1.2rem; }
.mood-result {
  min-height: 120px;
  background: var(--yy-card-bg);
  border-radius: var(--yy-radius-lg);
  padding: 2rem;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.8rem;
  border: 1px dashed rgba(255,255,255,0.2);
}
.mood-result .movie-title { font-size: 1.4rem; font-weight: 700; }
.mood-result .reason { color: rgba(254, 242, 242, 0.7); font-size: 0.95rem; }

/* Today picker */
.today-picker {
  background: linear-gradient(135deg, rgba(220, 38, 38, 0.15), rgba(251, 146, 60, 0.15));
  border-radius: var(--yy-radius-lg);
  padding: 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.today-picker::before {
  content: '\f7b5';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  top: -30px; right: -30px;
  font-size: 10rem;
  color: rgba(255,255,255,0.05);
  transform: rotate(15deg);
}
.today-picker h3 { font-size: 2.2rem; font-weight: 800; margin-bottom: 1.5rem; }
.today-picker .btn-pick {
  background: linear-gradient(135deg, var(--yy-primary), var(--yy-accent));
  border: none;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  padding: 1rem 3rem;
  border-radius: 50px;
  transition: all 0.4s;
  position: relative;
  overflow: hidden;
}
.today-picker .btn-pick:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(220, 38, 38, 0.4);
}
.today-pick-result {
  margin-top: 1.5rem;
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--yy-text);
  min-height: 2rem;
}

/* Related links */
.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 2rem;
}
.related-links a {
  background: var(--yy-card-bg);
  padding: 1rem 2rem;
  border-radius: 50px;
  font-weight: 500;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}
.related-links a:hover {
  background: linear-gradient(135deg, var(--yy-primary), var(--yy-accent));
  transform: translateY(-3px);
}

/* Friends section */
.friends-links {
  background: var(--yy-card-bg);
  border-radius: var(--yy-radius-lg);
  padding: 2.5rem;
  margin-top: 4rem;
}
.friends-links h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--yy-accent);
}
.friends-links .links-line {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  font-size: 0.9rem;
  color: rgba(254, 242, 242, 0.6);
}

/* Footer */
.footer {
  background: #0d0a0d;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 3rem 0 2rem;
  margin-top: 5rem;
}
.footer .brand {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--yy-text);
  margin-bottom: 1rem;
}
.footer .brand i { color: var(--yy-primary); }
.footer .copyright {
  font-size: 0.9rem;
  color: rgba(254, 242, 242, 0.5);
  margin-bottom: 1.5rem;
}
.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 1.5rem;
}
.footer-links a {
  color: rgba(254, 242, 242, 0.6);
  font-size: 0.95rem;
  transition: color 0.3s;
}
.footer-links a:hover { color: var(--yy-accent); }

/* Responsive */
@media (max-width: 768px) {
  .section { padding: 3rem 0; }
  .section-title { font-size: 1.8rem; }
  .category-layout { grid-template-columns: 1fr; }
  .category-sidebar { position: static; }
  .poster-wall { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; }
  .hero { min-height: 60vh; }
  .hero-content h1 { font-size: 2.5rem; }
  .modal-content { padding: 1.5rem; }
  .today-picker { padding: 2rem; }
  .ranking-list li { flex-wrap: wrap; }
}

/* --- 子页面追加 --- */
/* 关于我们页面专属样式 */
        .about-hero {
            background: linear-gradient(135deg, rgba(220, 38, 38, 0.15) 0%, rgba(20, 16, 19, 0.9) 60%), var(--yy-bg);
            padding: 100px 0 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
.about-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(circle, rgba(251, 146, 60, 0.08) 0%, transparent 70%);
            animation: float 8s ease-in-out infinite;
        }
.about-hero h1 {
            font-size: 3rem;
            font-weight: 900;
            color: var(--yy-text);
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }
.about-hero h1 span {
            background: linear-gradient(135deg, var(--yy-primary), var(--yy-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
.about-hero p {
            color: rgba(254, 242, 242, 0.8);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.8;
            position: relative;
            z-index: 1;
        }
.about-section {
            padding: 80px 0;
        }
.about-section-alt {
            background: rgba(31, 26, 31, 0.5);
        }
.about-card {
            background: var(--yy-card-bg);
            border: 1px solid rgba(220, 38, 38, 0.15);
            border-radius: var(--yy-radius-md);
            padding: 30px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
.about-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--yy-shadow);
            border-color: rgba(220, 38, 38, 0.4);
        }
.about-card-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--yy-primary), var(--yy-accent));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: #fff;
            margin-bottom: 20px;
        }
.about-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--yy-text);
            margin-bottom: 15px;
        }
.about-card p {
            color: rgba(254, 242, 242, 0.7);
            line-height: 1.8;
            font-size: 0.95rem;
        }
.about-stats {
            background: linear-gradient(135deg, rgba(220, 38, 38, 0.1), rgba(251, 146, 60, 0.1));
            border-radius: var(--yy-radius-lg);
            padding: 50px 30px;
            margin-top: 60px;
        }
.stat-item {
            text-align: center;
            padding: 20px;
        }
.stat-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--yy-primary);
            display: block;
            margin-bottom: 8px;
        }
.stat-label {
            color: rgba(254, 242, 242, 0.8);
            font-size: 0.95rem;
        }
.about-timeline {
            position: relative;
            padding: 30px 0;
        }
.timeline-item {
            position: relative;
            padding-left: 40px;
            padding-bottom: 40px;
            border-left: 2px solid rgba(220, 38, 38, 0.3);
        }
.timeline-item:last-child {
            border-left-color: transparent;
        }
.timeline-dot {
            position: absolute;
            left: -10px;
            top: 0;
            width: 18px;
            height: 18px;
            background: var(--yy-primary);
            border-radius: 50%;
            border: 3px solid var(--yy-bg);
            box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.3);
        }
.timeline-item h4 {
            color: var(--yy-text);
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
.timeline-item p {
            color: rgba(254, 242, 242, 0.7);
            line-height: 1.7;
            font-size: 0.9rem;
        }
.timeline-year {
            display: inline-block;
            background: rgba(220, 38, 38, 0.15);
            color: var(--yy-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
.about-cta {
            background: linear-gradient(135deg, var(--yy-primary), var(--yy-accent));
            border-radius: var(--yy-radius-lg);
            padding: 50px;
            text-align: center;
            margin-top: 60px;
        }
.about-cta h3 {
            color: #fff;
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 15px;
        }
.about-cta p {
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 25px;
        }
.about-cta-btn {
            display: inline-block;
            background: #fff;
            color: var(--yy-primary);
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.about-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
        }
.about-hero {
                padding: 80px 0 40px;
            }
.about-hero h1 {
                font-size: 2rem;
            }
.about-hero p {
                font-size: 1rem;
            }
.about-section {
                padding: 50px 0;
            }
.stat-number {
                font-size: 2rem;
            }
.about-cta {
                padding: 30px;
            }
.about-cta h3 {
                font-size: 1.4rem;
            }
0%, 100% { transform: translateY(0) rotate(0deg); }
50% { transform: translateY(-20px) rotate(5deg); }

/* --- 子页面追加 --- */
background: linear-gradient(135deg, rgba(20, 16, 19, 0.95) 0%, rgba(220, 38, 38, 0.25) 100%), url(' {随机图片}
.disclaimer-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--yy-text);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
.disclaimer-hero p {
            color: rgba(254, 242, 242, 0.7);
            font-size: 1.1rem;
            max-width: 700px;
        }
.disclaimer-section {
            padding: 50px 0;
            border-bottom: 1px solid rgba(220, 38, 38, 0.08);
        }
.disclaimer-section:last-child {
            border-bottom: none;
        }
.disclaimer-section h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--yy-text);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
.disclaimer-section h2 i {
            color: var(--yy-primary);
        }
.disclaimer-section p {
            color: rgba(254, 242, 242, 0.75);
            line-height: 1.8;
            font-size: 1rem;
            margin-bottom: 15px;
        }
.disclaimer-section ul {
            color: rgba(254, 242, 242, 0.75);
            padding-left: 20px;
            margin-bottom: 15px;
        }
.disclaimer-section li {
            margin-bottom: 8px;
            line-height: 1.7;
        }
.disclaimer-card {
            background: var(--yy-card-bg);
            border: 1px solid rgba(220, 38, 38, 0.12);
            border-radius: var(--yy-radius-md);
            padding: 24px;
            margin-bottom: 20px;
        }
.disclaimer-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--yy-text);
            margin-bottom: 12px;
        }
.disclaimer-card h3 i {
            color: var(--yy-accent);
            margin-right: 8px;
        }
.disclaimer-card p, .disclaimer-card li {
            color: rgba(254, 242, 242, 0.7);
            font-size: 0.95rem;
        }
.last-updated {
            color: rgba(254, 242, 242, 0.5);
            font-size: 0.85rem;
            margin-top: 10px;
        }
.disclaimer-hero { padding: 70px 0 40px; }
.disclaimer-hero h1 { font-size: 2rem; }
.disclaimer-section h2 { font-size: 1.4rem; }

/* --- 子页面追加 --- */
/* 本页专属样式 */
        .privacy-section {
            padding: 60px 0;
        }
.privacy-header {
            background: linear-gradient(135deg, rgba(220, 38, 38, 0.15) 0%, rgba(251, 146, 60, 0.1) 100%);
            border: 1px solid rgba(220, 38, 38, 0.2);
            border-radius: var(--yy-radius-lg);
            padding: 40px 30px;
            margin-bottom: 40px;
        }
.privacy-header h1 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
.privacy-header p {
            color: rgba(254, 242, 242, 0.7);
            font-size: 1rem;
            max-width: 800px;
            line-height: 1.7;
        }
.privacy-card {
            background: var(--yy-card-bg);
            border-radius: var(--yy-radius-md);
            padding: 30px;
            margin-bottom: 24px;
            box-shadow: var(--yy-shadow);
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: transform 0.3s ease;
        }
.privacy-card:hover {
            transform: translateY(-4px);
        }
.privacy-card h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--yy-accent);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
.privacy-card h2 i {
            font-size: 1.2rem;
            color: var(--yy-primary);
        }
.privacy-card p, .privacy-card li {
            color: rgba(254, 242, 242, 0.75);
            line-height: 1.8;
            font-size: 0.95rem;
        }
.privacy-card ul {
            padding-left: 20px;
            margin-bottom: 12px;
        }
.privacy-card li {
            margin-bottom: 8px;
        }
.privacy-card .highlight {
            color: var(--yy-accent);
            font-weight: 600;
        }
.update-info {
            background: rgba(220, 38, 38, 0.1);
            border-left: 4px solid var(--yy-primary);
            padding: 16px 20px;
            border-radius: 0 var(--yy-radius-sm) var(--yy-radius-sm) 0;
            margin-top: 30px;
        }
.update-info p {
            color: rgba(254, 242, 242, 0.8);
            margin: 0;
            font-size: 0.9rem;
        }
.contact-cta {
            background: linear-gradient(135deg, var(--yy-primary), var(--yy-accent));
            border-radius: var(--yy-radius-md);
            padding: 30px;
            text-align: center;
            margin-top: 30px;
        }
.contact-cta h3 {
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
.contact-cta p {
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 20px;
        }
.contact-cta .btn-contact {
            background: #fff;
            color: var(--yy-primary);
            border: none;
            padding: 12px 30px;
            border-radius: var(--yy-radius-sm);
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-block;
        }
.contact-cta .btn-contact:hover {
            transform: scale(1.05);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
        }
.privacy-header h1 {
                font-size: 1.8rem;
            }
.privacy-card {
                padding: 20px;
            }
.privacy-card h2 {
                font-size: 1.2rem;
            }

/* --- 子页面追加 --- */
/* 联系页微调，沿用变量 */
        .contact-hero {
            background: linear-gradient(145deg, var(--yy-bg) 0%, #1c1318 100%);
            border-bottom: 1px solid rgba(220, 38, 38, 0.2);
        }
.contact-section {
            background: var(--yy-bg);
        }
.contact-card {
            background: var(--yy-card-bg);
            border-radius: var(--yy-radius-md);
            box-shadow: var(--yy-shadow);
            transition: transform 0.2s ease;
            border: 1px solid rgba(255,255,255,0.04);
        }
.contact-card:hover {
            transform: translateY(-4px);
        }
.contact-icon {
            color: var(--yy-primary);
            font-size: 2.2rem;
            margin-bottom: 12px;
        }
.contact-form .form-control {
            background: rgba(20, 16, 19, 0.7);
            border: 1px solid rgba(255,255,255,0.1);
            color: var(--yy-text);
            border-radius: var(--yy-radius-sm);
            padding: 0.8rem 1rem;
        }
.contact-form .form-control:focus {
            background: rgba(30, 22, 28, 0.9);
            border-color: var(--yy-primary);
            box-shadow: 0 0 0 0.2rem rgba(220, 38, 38, 0.2);
            color: #fff;
        }
.contact-form .form-label {
            color: var(--yy-text);
            font-weight: 500;
            margin-bottom: 0.4rem;
        }
.btn-YY {
            background: var(--yy-primary);
            border: none;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            color: #fff;
            transition: 0.2s;
            letter-spacing: 0.3px;
        }
.btn-YY:hover {
            background: #b91c1c;
            color: #fff;
            transform: scale(1.02);
        }
.contact-info-item {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding: 0.8rem 0;
            border-bottom: 1px dashed rgba(255,255,255,0.08);
        }
.contact-info-item:last-child {
            border-bottom: none;
        }
.contact-info-icon {
            color: var(--yy-accent);
            font-size: 1.3rem;
            width: 30px;
            text-align: center;
            margin-top: 2px;
        }
.contact-info-text {
            color: rgba(254, 242, 242, 0.9);
            font-size: 0.95rem;
            line-height: 1.5;
        }
.contact-info-text a {
            color: var(--yy-accent);
            text-decoration: none;
        }
.contact-info-text a:hover {
            text-decoration: underline;
        }
.social-badge {
            display: inline-block;
            background: rgba(220, 38, 38, 0.12);
            color: var(--yy-accent);
            padding: 6px 16px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.9rem;
            margin: 0 6px 8px 0;
            border: 1px solid rgba(251, 146, 60, 0.25);
        }
.social-badge i {
            margin-right: 6px;
        }
/* 覆盖bootstrap卡片无白底 */
        .contact-card, .contact-card .card-body {
            background: var(--yy-card-bg);
            color: var(--yy-text);
        }
.form-control::placeholder {
            color: rgba(255,255,255,0.4);
        }
/* 导航高亮当前页 */
        .nav-link.active-contact {
            color: var(--yy-primary) !important;
            font-weight: 700;
        }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.form-select { background-color:rgba(0,0,0,.35) !important; color:#fef2f2 !important; border-color:rgba(255,255,255,.12) !important; }