/* ========================================
   s001 - layout.css
   导航、容器、页脚布局
   ======================================== */

/* ---- 顶部导航栏 ---- */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

.top-nav.scrolled {
  background: var(--bg-nav-scroll);
  box-shadow: var(--shadow-nav);
}

.nav-main {
  height: var(--nav-height);
  display: flex;
  align-items: center;
  gap: var(--gap-lg);
  padding: 0 var(--container-padding);
  max-width: var(--container-max);
  margin: 0 auto;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  flex-shrink: 0;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.nav-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-blue), #8B5CF6);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.nav-logo-links {
  display: flex;
  align-items: center;
  gap: var(--gap-md);
  margin-left: var(--gap-md);
}

.nav-logo-links a {
  font-size: var(--font-size-nav);
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-logo-links a:hover,
.nav-logo-links a.active {
  color: var(--text-primary);
}

/* 搜索框 */
.nav-search {
  flex: 1;
  max-width: 420px;
  position: relative;
}

.nav-search-input {
  width: 100%;
  height: 38px;
  background: var(--bg-search);
  border-radius: var(--radius-pill);
  padding: 0 16px 0 40px;
  font-size: var(--font-size-base);
  color: var(--text-primary);
  transition: background var(--transition-fast);
}

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

.nav-search-input:focus {
  background: rgba(152, 152, 152, 0.3);
}

.nav-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  font-size: 14px;
  pointer-events: none;
}

/* 热搜下拉 */
.search-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  padding: var(--gap-sm) 0;
  display: none;
  z-index: 100;
}

.search-dropdown.active {
  display: block;
}

.search-dropdown-title {
  padding: var(--gap-sm) var(--gap-lg);
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

.search-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--gap-md);
  padding: var(--gap-sm) var(--gap-lg);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-dropdown-item:hover {
  background: var(--bg-hover);
}

.search-dropdown-item .rank-num {
  width: 20px;
  text-align: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-tertiary);
}

.search-dropdown-item:nth-child(2) .rank-num { color: var(--rank-1); }
.search-dropdown-item:nth-child(3) .rank-num { color: var(--rank-2); }
.search-dropdown-item:nth-child(4) .rank-num { color: var(--rank-3); }

.search-dropdown-item .rank-text {
  font-size: var(--font-size-base);
  color: var(--text-primary);
}

/* 右侧功能区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--gap-xs);
  flex-shrink: 0;
}

.nav-action-item {
  display: flex;
  align-items: center;
  gap: var(--gap-xs);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-action-item:hover {
  color: var(--text-primary);
  background: var(--bg-tag);
}

.nav-action-item.vip {
  color: var(--accent-gold);
}

.nav-action-item.vip:hover {
  color: var(--accent-gold);
  background: rgba(255, 215, 0, 0.1);
}

.nav-action-item .icon {
  font-size: 16px;
}

.nav-login-btn {
  padding: 6px 16px;
  background: var(--accent-blue);
  color: #fff;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.nav-login-btn:hover {
  opacity: 0.85;
}

/* ---- 分类导航条 ---- */
.sub-nav {
  height: var(--subnav-height);
  background: var(--bg-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sub-nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--gap-xs);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  overflow-x: auto;
}

.sub-nav-inner::-webkit-scrollbar {
  display: none;
}

.sub-nav-item {
  padding: 3px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.sub-nav-item:hover,
.sub-nav-item.active {
  color: var(--text-primary);
  background: var(--bg-tag-hover);
}

/* ---- 主内容区 ---- */
.main-content {
  padding-top: calc(var(--nav-height) + var(--subnav-height));
}

/* ---- Banner轮播区 ---- */
.banner-section {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--gap-lg) var(--container-padding);
}

.banner-wrapper {
  display: flex;
  gap: var(--gap-md);
  height: 480px;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.banner-main {
  flex: 1;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
}

.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition-slow);
  overflow: hidden;
}

.banner-slide.active {
  opacity: 1;
}

/* Banner 背景图 */
.banner-slide-img {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-size: cover;
  background-position: center top;
  opacity: 0.45;
  filter: blur(2px);
  transform: scale(1.05);
  transition: transform 8s ease;
}

.banner-slide.active .banner-slide-img {
  transform: scale(1.12);
}

.banner-slide-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner-slide-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--gap-xxl) var(--gap-xl);
  background: linear-gradient(0deg, rgba(9, 11, 33, 0.95) 0%, rgba(9, 11, 33, 0.6) 40%, rgba(9, 11, 33, 0.2) 70%, transparent 100%);
  z-index: 2;
}

.banner-slide-tags {
  display: flex;
  gap: var(--gap-sm);
  margin-bottom: var(--gap-md);
}

.banner-slide-tag {
  padding: 2px 10px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  backdrop-filter: blur(4px);
}

.banner-slide-title {
  font-size: var(--font-size-banner);
  font-weight: 600;
  margin-bottom: var(--gap-md);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.7);
}

.banner-slide-desc {
  font-size: var(--font-size-md);
  color: var(--text-secondary);
  margin-bottom: var(--gap-lg);
  max-width: 60%;
  line-height: 1.6;
}

.banner-slide-actions {
  display: flex;
  align-items: center;
  gap: var(--gap-lg);
}

.banner-play-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--gap-sm);
  padding: 10px 28px;
  background: var(--accent-blue);
  color: #fff;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-md);
  font-weight: 500;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.banner-play-btn:hover {
  transform: scale(1.05);
  opacity: 0.9;
  color: #fff;
}

.banner-score {
  font-size: var(--font-size-lg);
  color: var(--accent-gold);
  font-weight: 600;
}

/* Banner 指示器 */
.banner-indicators {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 5;
}

.banner-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.banner-dot.active {
  width: 24px;
  border-radius: 4px;
  background: var(--accent-blue);
}

/* Banner 右侧缩略图 */
.banner-thumbs {
  width: 220px;
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
  flex-shrink: 0;
}

.banner-thumb {
  flex: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  background: var(--placeholder-gradient);
}

.banner-thumb:hover {
  transform: scale(1.03);
}

.banner-thumb.active {
  box-shadow: 0 0 0 2px var(--accent-blue);
}

.banner-thumb-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
}

.banner-thumb-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.2), transparent);
  padding: 24px 8px 6px;
}

.banner-thumb-title {
  font-size: var(--font-size-xs);
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---- 内容板块 ---- */
.content-section {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--gap-xl) var(--container-padding) 0;
}

.section-header {
  display: flex;
  align-items: center;
  gap: var(--gap-lg);
  margin-bottom: var(--gap-lg);
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 500;
  color: var(--text-primary);
  flex-shrink: 0;
}

.section-tags {
  display: flex;
  align-items: center;
  gap: var(--gap-xs);
  overflow-x: auto;
  flex: 1;
}

.section-tags::-webkit-scrollbar {
  display: none;
}

.section-tag {
  padding: 3px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.section-tag:hover,
.section-tag.active {
  color: var(--text-primary);
  background: var(--bg-tag-hover);
}

.section-more {
  margin-left: auto;
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  cursor: pointer;
  flex-shrink: 0;
  transition: color var(--transition-fast);
}

.section-more:hover {
  color: var(--text-primary);
}

/* 横向滚动容器 */
.scroll-row {
  display: flex;
  gap: var(--gap-md);
  overflow-x: auto;
  padding-bottom: var(--gap-sm);
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
}

.scroll-row::-webkit-scrollbar {
  height: 4px;
}

.scroll-row::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.03);
}

.scroll-row::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

/* 网格容器 */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap-lg);
}

.grid-5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--gap-lg);
}

/* ---- 排行榜 ---- */
.ranking-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap-sm) var(--gap-xl);
}

.ranking-item {
  display: flex;
  align-items: center;
  gap: var(--gap-md);
  padding: var(--gap-sm) var(--gap-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  cursor: pointer;
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm);
}

.ranking-item:hover {
  background: var(--bg-tag);
}

.ranking-num {
  width: 24px;
  text-align: center;
  font-size: var(--font-size-nav);
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
}

.ranking-item:nth-child(1) .ranking-num { color: var(--rank-1); font-size: 20px; }
.ranking-item:nth-child(2) .ranking-num { color: var(--rank-2); font-size: 18px; }
.ranking-item:nth-child(3) .ranking-num { color: var(--rank-3); font-size: 18px; }

.ranking-info {
  flex: 1;
  min-width: 0;
}

.ranking-name {
  font-size: var(--font-size-md);
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ranking-meta {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  margin-top: 2px;
}

.ranking-score {
  font-size: var(--font-size-md);
  color: var(--accent-gold);
  font-weight: 500;
  flex-shrink: 0;
}

/* ---- 页脚 ---- */
.site-footer {
  margin-top: var(--gap-xxl);
  padding: var(--gap-xxl) 0;
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

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

.footer-links {
  display: flex;
  gap: var(--gap-xxl);
  margin-bottom: var(--gap-xl);
}

.footer-col h4 {
  font-size: var(--font-size-md);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--gap-md);
}

.footer-col a {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  padding: 3px 0;
  transition: color var(--transition-fast);
}

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

.footer-toolbar {
  display: flex;
  align-items: center;
  gap: var(--gap-lg);
  padding: var(--gap-lg) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: var(--gap-lg);
  flex-wrap: wrap;
}

.footer-toolbar-item {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.footer-toolbar-item:hover {
  color: var(--text-primary);
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  text-align: center;
}

/* ---- 底部悬浮工具栏 ---- */
.floating-bar {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
  z-index: 999;
}

.floating-btn {
  width: 44px;
  height: 44px;
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-card);
}

.floating-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  transform: scale(1.1);
}

.floating-btn.accent {
  background: var(--accent-gold);
  color: #000;
  border-color: var(--accent-gold);
}

.floating-btn.accent:hover {
  opacity: 0.9;
}