--- START OF FILE styles.css ---

:root {
  /* Apple 经典配色体系 */
  --ink: #1d1d1f;          
  --muted: #86868b;        
  --soft: #f5f5f7;         
  --line: rgba(0, 0, 0, 0.08);
  --glass: rgba(255, 255, 255, 0.8);
  --pink: #fb7299;
  --apple-blue: #0071e3;   
  --radius: 18px;          
  
  color: var(--ink);
  font-family:
    "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, 
    "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-synthesis-weight: none;
  letter-spacing: -0.01em; 
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased; 
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--ink);
}

img {
  display: block;
  max-width: 100%;
}

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

/* 导航栏：更强的毛玻璃效果 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  padding: 8px 28px;
  background: var(--glass);
  backdrop-filter: blur(32px) saturate(180%);
  -webkit-backdrop-filter: blur(32px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.brand,
.site-header nav,
.hero-actions,
.video-stats {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0;
}

.brand img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
}

.site-header nav {
  gap: 32px;
  font-size: 12px;
  font-weight: 400;
  color: #1d1d1f;
}

.site-header a {
  transition: color 200ms ease;
}

.site-header a:hover {
  color: var(--apple-blue);
}

.nav-cta {
  border-radius: 999px;
  background: var(--apple-blue);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  padding: 6px 14px;
  transition: background 200ms ease;
}

.nav-cta:hover {
  color: #fff;
  background: #0077ed;
}

/* ----------------------------------------------------
   Apple 风格滚动视频特效 Hero 区域
---------------------------------------------------- */
.hero-container {
  /* 预留出 200vh 的滚动空间供用户往下划 */
  height: 200vh; 
  position: relative;
  background: #000;
  margin-top: -48px; /* 抵消顶部导航栏高度，让视频完全置顶 */
}

.hero-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh; /* 适配移动端地址栏收缩问题 */
  width: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover; /* 视频铺满全屏 */
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: #000;
  /* 遮罩透明度由 JS 滚动计算动态修改 */
  opacity: var(--overlay-opacity, 0); 
  z-index: 2;
  will-change: opacity;
}

.hero-copy {
  position: relative;
  z-index: 3;
  width: min(100%, 880px);
  max-width: 880px;
  padding: 0 24px;
  text-align: center;
  color: #fff;
  /* 文字区渐显、上浮和缩放由 JS 滚动计算动态修改 */
  opacity: var(--hero-opacity, 0);
  transform: translateY(calc(var(--hero-y, 40) * 1px)) scale(var(--hero-scale, 1.05));
  will-change: opacity, transform;
}

/* 向下滚动提示动画 */
.scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.6);
  opacity: var(--hint-opacity, 1);
  will-change: opacity;
}

.scroll-hint span {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-hint svg {
  width: 16px;
  height: 16px;
  animation: bounce 2s infinite ease-in-out;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* 标题字体排版 */
.eyebrow,
.section-kicker {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.eyebrow {
  color: rgba(255, 255, 255, 0.7);
}

.section-kicker {
  color: var(--muted);
}

.hero-copy h1,
.intro-section h2,
.feature-copy h2,
.section-heading h2,
.tone-section h2,
.watchlist-section h2 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hero-copy h1 {
  margin-top: 8px;
  font-size: 88px;
  line-height: 1.05;
  background: linear-gradient(135deg, #fff 0%, #a5a5a7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lede {
  max-width: 620px;
  margin: 20px auto 0;
  color: #a1a1a6;
  font-size: 24px;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0;
}

.hero-actions {
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 40px;
}

/* 胶囊按钮 */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 999px;
  padding: 0 24px;
  font-size: 15px;
  font-weight: 500;
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), background 200ms ease;
}

.button:active {
  transform: scale(0.96); 
}

.button-primary {
  background: #fff;
  color: #1d1d1f;
}

.button-primary:hover {
  background: #f5f5f7;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.button-dark {
  background: var(--ink);
  color: #fff;
}

.button-dark:hover {
  background: #323236;
}

/* ----------------------------------------------------
   下方内容区布局
---------------------------------------------------- */
.stats-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 40px 28px;
  max-width: 1220px;
  margin: 0 auto;
}

.stat {
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  background: var(--soft);
  border-radius: 24px;
}

.stat strong {
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.stat span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.intro-section,
.video-grid-section,
.watchlist-section {
  max-width: 1220px;
  margin: 0 auto;
  padding: 80px 28px;
}

.intro-section {
  text-align: center;
}

.intro-section h2 {
  max-width: 830px;
  margin: 16px auto 0;
  font-size: 52px;
  line-height: 1.1;
}

.intro-section p {
  max-width: 760px;
  margin: 24px auto 0;
  color: var(--muted);
  font-size: 21px; 
  line-height: 1.6;
  font-weight: 400;
}

/* 主打视频区 */
.feature-section {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: 72px;
  align-items: center;
  max-width: 1220px;
  margin: 0 auto;
  padding: 40px 28px 100px;
}

.feature-copy h2 {
  margin-top: 14px;
  font-size: 48px;
  line-height: 1.1;
}

.feature-copy p {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.6;
}

.release-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 36px 0;
}

.release-meta div {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.release-meta dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.release-meta dd {
  margin: 8px 0 0;
  font-size: 22px;
  font-weight: 600;
}

.feature-poster {
  display: block;
  overflow: hidden;
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
  transition: transform 400ms cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 400ms ease;
}

.feature-poster img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.feature-poster:hover {
  transform: scale(1.01);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.18);
}

.feature-poster:hover img {
  transform: scale(1.03);
}

/* 视频网格区 */
.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 36px;
  align-items: end;
  margin-bottom: 48px;
}

.section-heading h2 {
  margin-top: 8px;
  font-size: 48px;
}

.section-heading p {
  max-width: 330px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.video-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 20px;
  background: var(--soft);
  transition: transform 400ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.video-card:hover {
  transform: scale(1.02);
}

.video-thumb {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 20px 20px 0 0;
}

.video-thumb img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.video-thumb span {
  position: absolute;
  right: 12px;
  bottom: 12px;
  border-radius: 999px;
  padding: 4px 10px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
}

.video-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.video-date {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
}

.video-body h3 {
  margin: 8px 0 0;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 600;
}

.video-body p:not(.video-date) {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
  flex-grow: 1;
}

.video-stats {
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
}

.video-stats span {
  border-radius: 6px;
  background: #e8e8ed;
  padding: 4px 8px;
}

/* 标签区 */
.tone-section {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 48px;
  align-items: center;
  padding: 120px 28px;
  background: #000;
  color: #f5f5f7;
}

.tone-section > div {
  max-width: 560px;
  justify-self: end;
}

.tone-section h2 {
  margin-top: 12px;
  font-size: 48px;
  line-height: 1.1;
}

.tone-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  max-width: 580px;
}

.tone-list span {
  border-radius: 999px;
  padding: 12px 20px;
  background: #1d1d1f;
  color: #f5f5f7;
  font-size: 15px;
  font-weight: 500;
  transition: background 200ms ease;
}

.tone-list span:hover {
  background: #323236;
}

/* 收藏展示区 */
.watchlist-section {
  text-align: center;
  padding-bottom: 120px;
}

.watchlist-section h2 {
  max-width: 760px;
  margin: 16px auto 0;
  font-size: 48px;
  line-height: 1.1;
}

.watchlist-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.watch-item {
  min-height: 160px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 12px;
  padding: 32px;
  border-radius: 24px;
  background: var(--soft);
  transition: transform 300ms ease;
}

.watch-item:hover {
  transform: translateY(-4px);
}

.watch-item strong {
  font-size: 24px;
  font-weight: 600;
}

.watch-item span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

/* 页脚 */
.site-footer {
  max-width: 1220px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 28px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--ink);
  font-weight: 500;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* 响应式适配 */
@media (max-width: 980px) {
  .site-header nav {
    display: none;
  }

  .hero-copy h1 {
    font-size: 64px;
  }

  .hero-lede {
    font-size: 20px;
  }

  .stats-band {
    padding: 24px;
  }
  
  .stats-band,
  .video-grid,
  .watchlist-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-section,
  .tone-section {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .tone-section > div {
    justify-self: start;
  }

  .section-heading {
    display: block;
  }

  .section-heading p {
    margin-top: 16px;
  }
}

@media (max-width: 640px) {
  .nav-cta {
    display: none;
  }

  .hero-container {
    height: 180vh;
  }

  .hero-copy h1 {
    font-size: 48px;
  }

  .hero-lede {
    font-size: 18px;
    max-width: 300px;
  }

  .button {
    width: 100%;
    max-width: 340px;
  }

  .hero-actions {
    display: grid;
    justify-items: center;
    width: 100%;
  }

  .stats-band {
    padding: 16px;
  }

  .stats-band,
  .video-grid,
  .watchlist-grid,
  .release-meta {
    grid-template-columns: 1fr;
  }

  .stat {
    min-height: 100px;
  }

  .intro-section,
  .video-grid-section,
  .watchlist-section {
    padding: 64px 18px;
  }

  .intro-section h2,
  .feature-copy h2,
  .section-heading h2,
  .tone-section h2,
  .watchlist-section h2 {
    font-size: 36px;
  }

  .intro-section p,
  .feature-copy p {
    font-size: 17px;
  }

  .feature-section,
  .tone-section {
    padding: 58px 18px;
  }

  .site-footer {
    display: block;
    padding: 24px 18px;
  }

  .site-footer a {
    display: inline-block;
    margin-top: 12px;
  }
}
--- END OF FILE styles.css ---