:root {
  --bg-base: #0a0a0f;
  --bg-panel: #12121a;
  --bg-panel-hover: #1a1a24;
  --text-main: #e2e2ea;
  --text-muted: #8e8e9e;
  --neon-cyan: #00f0ff;
  --neon-magenta: #ff00aa;
  --neon-purple: #9d00ff;
  --border-color: #2a2a3a;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s;
}

ul {
  list-style: none;
}

/* 顶部导航 */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo-area img {
  height: 32px;
  border-radius: 6px;
}

.logo-text {
  font-size: 1.2rem;
  font-weight: bold;
  color: #fff;
  letter-spacing: 1px;
  text-shadow: 0 0 8px var(--neon-cyan);
}

.nav-links {
  display: none;
  gap: 20px;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--neon-cyan);
  text-shadow: 0 0 8px var(--neon-cyan);
}

.header-actions {
  display: flex;
  gap: 10px;
}

.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 4px;
  font-weight: bold;
  font-size: 0.9rem;
  text-align: center;
  cursor: pointer;
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  background: transparent;
  transition: all 0.3s ease;
}

.btn:hover {
  background: var(--neon-cyan);
  color: #000;
  box-shadow: 0 0 12px var(--neon-cyan);
}

.btn-magenta {
  border-color: var(--neon-magenta);
  color: var(--neon-magenta);
}

.btn-magenta:hover {
  background: var(--neon-magenta);
  color: #fff;
  box-shadow: 0 0 12px var(--neon-magenta);
}

/* 首屏大字报 */
.hero {
  padding: 60px 20px;
  text-align: center;
  background: linear-gradient(180deg, rgba(157, 0, 255, 0.1) 0%, var(--bg-base) 100%);
  position: relative;
}

.hero h1 {
  font-size: 2.5rem;
  line-height: 1.3;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
  letter-spacing: 2px;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 30px;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 15px;
}

.hero-cta .btn {
  padding: 12px 30px;
  font-size: 1.05rem;
}

/* 瀑布流错落布局容器 */
.masonry-section {
  padding: 40px 20px;
}

.section-title {
  font-size: 1.8rem;
  margin-bottom: 24px;
  color: #fff;
  text-align: center;
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.section-title span {
  color: var(--neon-magenta);
}

.masonry-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.masonry-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.3s, border-color 0.3s;
}

.masonry-card:hover {
  transform: translateY(-5px);
  border-color: var(--neon-purple);
  box-shadow: 0 8px 24px rgba(157, 0, 255, 0.2);
}

.masonry-img {
  width: 100%;
  display: block;
  object-fit: cover;
  border-bottom: 1px solid var(--border-color);
}

.masonry-content {
  padding: 16px;
}

.masonry-content h3 {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 8px;
}

.masonry-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* 紧凑型列表 */
.list-section {
  padding: 40px 20px;
  background: var(--bg-panel);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.compact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.list-item {
  display: flex;
  align-items: center;
  background: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px;
  transition: background 0.3s;
}

.list-item:hover {
  background: var(--bg-panel-hover);
}

.list-item img {
  width: 60px;
  height: 80px;
  object-fit: cover;
  border-radius: 4px;
  margin-right: 16px;
}

.list-info h4 {
  font-size: 1rem;
  color: var(--neon-cyan);
  margin-bottom: 4px;
}

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

/* 3D 旋转卡 */
.rotation-section {
  padding: 60px 20px;
  text-align: center;
  perspective: 1000px;
}

.card-3d {
  width: 260px;
  height: 380px;
  margin: 0 auto;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
  cursor: pointer;
}

.card-3d.flipped {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 16px;
  overflow: hidden;
  border: 2px solid var(--neon-magenta);
  box-shadow: 0 0 20px rgba(255, 0, 170, 0.3);
}

.card-face img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-back {
  transform: rotateY(180deg);
  background: var(--bg-panel);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.card-back h3 {
  color: var(--neon-cyan);
  margin-bottom: 10px;
}

.card-back p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.click-hint {
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--neon-purple);
}

/* 跑马灯弹幕 */
.barrage-container {
  overflow: hidden;
  white-space: nowrap;
  background: rgba(0, 240, 255, 0.05);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
}

.barrage-content {
  display: inline-block;
  animation: scroll-left 20s linear infinite;
}

.barrage-content span {
  margin-right: 40px;
  font-size: 0.95rem;
  color: var(--neon-cyan);
}

@keyframes scroll-left {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* 折叠面板 */
.faq-section {
  padding: 40px 20px;
}

.faq-item {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  padding: 16px;
  font-weight: bold;
  color: #fff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-base);
}

.faq-question:hover {
  color: var(--neon-cyan);
}

.faq-answer {
  padding: 0 16px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.faq-item.active .faq-answer {
  padding: 16px;
  max-height: 200px;
}

.faq-item.active .faq-question {
  color: var(--neon-magenta);
}

/* 页脚相关搜索 */
.footer {
  background: #050508;
  padding: 40px 20px 20px;
  border-top: 1px solid var(--border-color);
}

.footer-search h3 {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 16px;
}

.search-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.search-tags a {
  font-size: 0.85rem;
  color: #555566;
  background: #111116;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid #222;
}

.search-tags a:hover {
  color: var(--neon-cyan);
  border-color: var(--neon-cyan);
}

.copyright {
  margin-top: 40px;
  text-align: center;
  font-size: 0.8rem;
  color: #444455;
  border-top: 1px solid #111;
  padding-top: 20px;
}

/* PC 端适配 */
@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
  
  .masonry-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .masonry-card:nth-child(even) {
    transform: translateY(40px);
  }
  
  .masonry-card:nth-child(even):hover {
    transform: translateY(35px);
  }
}

@media (min-width: 1024px) {
  .masonry-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .masonry-card:nth-child(3n+2) {
    transform: translateY(60px);
  }
  
  .masonry-card:nth-child(3n+2):hover {
    transform: translateY(55px);
  }
}