:root {
  --bg-dark: #0b0b0b;
  --neon-green: #d7ff3f;
  --orange: #ff5a28;
  --cream: #f5f1e7;
  --card-bg: #151515;
  --border-color: #333;
  --font-main: "Arial Black", "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--cream);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 布局框架 */
.layout-wrapper {
  display: flex;
  min-height: 100vh;
}

/* 侧边栏导航 (桌面端) */
.sidebar {
  width: 220px;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  background-color: var(--bg-dark);
  border-right: 2px solid var(--border-color);
  padding: 40px 0;
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 15px 25px;
  color: var(--cream);
  opacity: 0.6;
  transition: all 0.2s;
}

.nav-item:hover, .nav-item.active {
  opacity: 1;
  color: var(--neon-green);
}

.nav-num {
  font-family: "Courier New", Courier, monospace;
  font-size: 28px;
  font-weight: 900;
  margin-right: 15px;
  -webkit-text-stroke: 1px var(--cream);
  color: transparent;
}

.nav-item:hover .nav-num, .nav-item.active .nav-num {
  -webkit-text-stroke: 1px var(--neon-green);
  color: var(--neon-green);
}

.nav-text {
  font-size: 18px;
  font-weight: 700;
}

/* 主内容区 */
.main-content {
  margin-left: 220px;
  flex: 1;
  padding: 0 40px;
  overflow-x: hidden;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
}

/* Section 基础样式 */
section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  margin-bottom: 50px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  background-color: var(--orange);
  color: var(--bg-dark);
  padding: 4px 10px;
  border-radius: 4px;
  font-family: "Courier New", Courier, monospace;
  font-weight: 900;
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.section-title {
  font-size: 36px;
  font-weight: 900;
  color: var(--neon-green);
  text-transform: uppercase;
  letter-spacing: 2px;
}

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

/* 首屏 Section 01 */
.hero-section {
  text-align: center;
  padding-top: 120px;
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.hero-logo-box {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.hero-logo-box img {
  height: 36px;
  width: auto;
  margin-right: 12px;
  border-radius: 6px;
}

.hero-logo-text {
  font-size: 20px;
  font-weight: 900;
  color: var(--cream);
}

.hero-title {
  font-size: 72px;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 20px;
  text-shadow: 4px 4px 0 var(--orange);
}

.hero-desc {
  font-size: 20px;
  color: var(--cream);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 30px;
  font-weight: 400;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.hero-btn-group {
  margin-bottom: 40px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--neon-green);
  color: var(--bg-dark);
  font-size: 20px;
  font-weight: 900;
  padding: 16px 40px;
  border: 3px solid var(--bg-dark);
  box-shadow: 6px 6px 0 var(--cream);
  transition: all 0.1s;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translate(2px, 2px);
  box-shadow: 4px 4px 0 var(--cream);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: var(--neon-green);
  border: 2px solid var(--neon-green);
  font-size: 16px;
  font-weight: 700;
  padding: 14px 30px;
  margin-left: 15px;
  transition: all 0.2s;
}

.btn-secondary:hover {
  background-color: var(--neon-green);
  color: var(--bg-dark);
}

.hero-data-strip {
  display: flex;
  justify-content: center;
  gap: 40px;
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
  width: 100%;
  max-width: 600px;
}

.data-item h4 {
  font-size: 28px;
  color: var(--orange);
  font-family: "Courier New", Courier, monospace;
  font-weight: 900;
}

.data-item p {
  font-size: 14px;
  color: var(--cream);
  opacity: 0.7;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.hero-mockup {
  margin-top: 50px;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 9 / 16;
  border: 4px solid var(--border-color);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0,0,0,0.8), 0 0 0 2px var(--neon-green);
  position: relative;
}

/* Section 02 套路 */
.trope-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.trope-card {
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  padding: 30px;
  border-radius: 8px;
  position: relative;
}

.trope-card.original {
  border-left: 6px solid #666;
}

.trope-card.magic {
  border-left: 6px solid var(--neon-green);
  box-shadow: 4px 4px 0 rgba(215, 255, 63, 0.2);
}

.trope-card h3 {
  font-size: 24px;
  margin-bottom: 15px;
  color: var(--cream);
}

.trope-card.original h3 {
  color: #888;
}

.trope-card.magic h3 {
  color: var(--neon-green);
}

.trope-card p {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #aaa;
  font-size: 16px;
  line-height: 1.8;
}

.trope-card.magic p {
  color: var(--cream);
}

/* Section 03 片单 */
.playlist-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.playlist-card {
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s;
}

.playlist-card:hover {
  transform: translateY(-5px);
  border-color: var(--neon-green);
}

.playlist-img {
  width: 100%;
  aspect-ratio: 3 / 4;
  position: relative;
}

.playlist-info {
  padding: 20px;
}

.playlist-info h3 {
  font-size: 20px;
  color: var(--cream);
  margin-bottom: 8px;
}

.playlist-info p {
  font-size: 14px;
  color: #aaa;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  margin-bottom: 15px;
}

.btn-play {
  display: inline-block;
  font-size: 14px;
  font-weight: 900;
  color: var(--orange);
  text-transform: uppercase;
}

/* Section 04 标签 */
.tag-section {
  background-color: #111;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.tag-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

.tag-pill {
  background-color: transparent;
  border: 2px solid var(--cream);
  color: var(--cream);
  padding: 10px 24px;
  font-size: 18px;
  font-weight: 900;
  border-radius: 50px;
  transition: all 0.2s;
  cursor: pointer;
}

.tag-pill:hover {
  background-color: var(--neon-green);
  border-color: var(--neon-green);
  color: var(--bg-dark);
}

.tag-pill.active {
  background-color: var(--orange);
  border-color: var(--orange);
  color: var(--bg-dark);
}

.tag-image-box {
  border-radius: 12px;
  overflow: hidden;
  border: 3px solid var(--border-color);
  aspect-ratio: 16 / 9;
}

/* Section 05 数据 & 06 留言 */
.data-layout {
  display: flex;
  gap: 40px;
  align-items: stretch;
}

.data-img {
  flex: 1;
  border-radius: 12px;
  overflow: hidden;
  border: 3px solid var(--border-color);
}

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

.data-cards {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 20px;
}

.data-big-card {
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  padding: 25px;
  border-radius: 8px;
}

.data-big-card h3 {
  font-size: 36px;
  color: var(--neon-green);
  font-family: "Courier New", Courier, monospace;
  margin-bottom: 5px;
}

.data-big-card p {
  font-size: 16px;
  color: var(--cream);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

.review-card {
  background-color: var(--card-bg);
  border: 2px solid var(--border-color);
  padding: 25px;
  border-radius: 8px;
}

.review-header {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
}

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--border-color);
  margin-right: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  color: var(--orange);
}

.review-name {
  font-size: 16px;
  color: var(--cream);
  font-weight: 700;
}

.review-text {
  font-size: 15px;
  color: #aaa;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

/* Section 07 FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 2px solid var(--border-color);
  padding: 25px 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-q {
  font-size: 22px;
  color: var(--cream);
  font-weight: 900;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
}

.faq-q::before {
  content: "Q";
  display: inline-block;
  margin-right: 15px;
  color: var(--orange);
  font-family: "Courier New", Courier, monospace;
}

.faq-a {
  font-size: 16px;
  color: #aaa;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.8;
  padding-left: 35px;
}

/* Section 08 下载 */
.download-section {
  text-align: center;
  background: linear-gradient(180deg, var(--bg-dark) 0%, #151515 100%);
  border-top: 4px solid var(--neon-green);
}

.download-section h2 {
  font-size: 48px;
  color: var(--cream);
  margin-bottom: 20px;
  text-shadow: 3px 3px 0 var(--orange);
}

.download-section p {
  font-size: 18px;
  color: #aaa;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  margin-bottom: 40px;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  text-align: center;
  font-size: 12px;
  color: #666;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

footer a {
  color: #666;
  transition: color 0.2s;
}

footer a:hover {
  color: var(--cream);
}

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

/* 响应式 */
@media (max-width: 1024px) {
  .hero-title { font-size: 56px; }
  .trope-grid { grid-template-columns: 1fr; }
  .playlist-grid { grid-template-columns: repeat(2, 1fr); }
  .tag-layout { grid-template-columns: 1fr; }
  .data-layout { flex-direction: column; }
  .review-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .layout-wrapper { flex-direction: column; }
  
  .sidebar {
    position: fixed;
    bottom: 0;
    top: auto;
    width: 100%;
    height: 70px;
    flex-direction: row;
    justify-content: space-around;
    padding: 0;
    border-right: none;
    border-top: 2px solid var(--border-color);
    background-color: rgba(11, 11, 11, 0.95);
    backdrop-filter: blur(10px);
  }

  .nav-item {
    flex-direction: column;
    padding: 10px 5px;
    justify-content: center;
  }

  .nav-num {
    font-size: 16px;
    margin-right: 0;
    margin-bottom: 2px;
  }

  .nav-text {
    font-size: 12px;
  }

  .main-content {
    margin-left: 0;
    padding: 0 20px 80px 20px;
  }

  .hero-section { padding-top: 80px; min-height: 60vh; }
  .hero-title { font-size: 38px; }
  .hero-desc { font-size: 16px; }
  .hero-logo-box img { height: 28px; }
  .hero-logo-text { font-size: 16px; }
  
  .btn-primary { font-size: 18px; padding: 14px 30px; width: 100%; margin-bottom: 15px; }
  .btn-secondary { margin-left: 0; width: 100%; }
  
  .hero-data-strip { flex-wrap: wrap; gap: 20px; }
  
  .section-title { font-size: 28px; }
  .playlist-grid { grid-template-columns: 1fr; }
  
  .data-cards { gap: 15px; }
  .download-section h2 { font-size: 32px; }
}