/* ===== 全局 ===== */
* { box-sizing: border-box; }

body {
  margin: 0;
  padding-top: 135px;
  font-family: 'Inter', -apple-system, "Helvetica Neue", Arial, sans-serif;
  background: #faf8f6;
  color: #2b2b2b;
  line-height: 1.8;
}

/* ===== 导航栏 ===== */
.site-header {
  text-align: center;
  padding: 30px 0 20px;
  background: #faf8f6;
}
.site-header .logo {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: #faf8f6;
  padding: 18px 0 14px;
  border-bottom: 1px solid #eee;
}
.site-header .logo img {
  height: 44px;
  width: auto;
  display: block;
  margin: 0 auto;
}
.site-header nav a {
  margin: 0 28px;
  text-decoration: none;
  color: #111;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
}

/* ===== 第 1 屏：主视觉 ===== */
.screen {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}
.screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.screen-text {
  position: absolute;
  left: 50%;
  bottom: 15%;
  transform: translateX(-50%);
  text-align: center;
  color: #fff;
  width: 90%;
  max-width: 600px;
  text-shadow: 0 1px 20px rgba(0,0,0,0.35);
}
.screen-text .kicker {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  letter-spacing: 4px;
  margin-bottom: 12px;
  text-transform: uppercase;
  opacity: 0.9;
}
.screen-text h1 {
  font-family: 'Inter', sans-serif;
  font-weight: 300;
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: 1px;
  margin: 0 0 14px;
}
.screen-text .sub {
  font-size: 15px;
  opacity: 0.9;
  margin: 0 0 22px;
}
.btn {
  display: inline-block;
  padding: 12px 28px;
  border: 1px solid #fff;
  color: #fff;
  text-decoration: none;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  transition: all 0.3s ease;
}
.btn:hover {
  background: #fff;
  color: #111;
}
.btn.light {
  border-color: #111;
  color: #111;
}
.btn.light:hover {
  background: #111;
  color: #fff;
}

/* ===== 第 2 屏：左 4 图 + 右视频 ===== */
.split-screen {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
  padding: 80px 24px;
  align-items: start;
}
.split-left {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.thumb {
  aspect-ratio: 9 / 16;
  overflow: hidden;
  cursor: pointer;
  border-radius: 6px;
  background: #f0ece8;
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}
.thumb:hover img {
  transform: scale(1.04);
}
.split-right video {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  border-radius: 6px;
  background: #000;
}

/* ===== 第 3 屏：分类 ===== */
.categories {
  padding: 30px 24px 60px;
  text-align: center;
}
.section-title {
  font-family: 'Playfair Display', serif;
  font-weight: 400;
  font-size: 24px;
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
}
.category-item {
  text-decoration: none;
  color: #2b2b2b;
}
.category-item img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  display: block;
  border-radius: 6px;
  transition: transform 0.3s ease;
}
.category-item:hover img {
  transform: scale(1.03);
}
.category-item p {
  margin-top: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  font-family: 'Inter', sans-serif;
}

/* ===== 第 4 屏：收尾 ===== */
.closing {
  text-align: center;
  padding: 100px 24px;
  background: #f5f0ea;
}
.closing h2 {
  font-family: 'Inter', sans-serif;
  font-weight: 300;
  font-size: 26px;
  letter-spacing: 5px;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.closing p {
  max-width: 560px;
  margin: 0 auto 32px;
  color: #555;
  font-size: 15px;
}

/* ===== About 页 ===== */
.story {
  max-width: 640px;
  margin: 40px auto;
  padding: 0 24px;
}
.story h1 {
  font-family: 'Inter', sans-serif;
  font-weight: 300;
  font-size: 32px;
  letter-spacing: 5px;
  text-transform: uppercase;
  margin-bottom: 28px;
  text-align: center;
}
.story p {
  font-size: 16px;
  color: #444;
  margin-bottom: 28px;
}
.story img {
  width: 100%;
  height: auto;
  display: block;
  margin: 40px 0;
}
.back {
  display: inline-block;
  margin-top: 40px;
  font-size: 12px;
  color: #888;
  text-decoration: none;
  border-bottom: 1px solid #ddd;
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* ===== 页脚 ===== */
.site-footer {
  text-align: center;
  padding: 60px 24px;
  font-size: 11px;
  color: #aaa;
  border-top: 1px solid #eee;
  letter-spacing: 1px;
}
.site-footer a {
  color: #aaa;
  text-decoration: none;
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .category-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .screen-text h1 {
    font-size: 52px;
  }
}

@media (max-width: 768px) {
  .split-screen {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}