:root {
  --layout-padding: 48px;
  --body-padding: 16px;
  --grid-gap: 24px;
  --accent-color: #cf721b;
  --column-unit: 80px;
  --section-spacing: 48px;
}

@font-face {
  font-family: 'SourceHanSerifCN';
  src: url('SourceHanSerifCN-Regular.otf') format('opentype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* Responsive variables */
@media (min-width: 820px) {
  :root {
    --layout-padding: 80px;
    --body-padding: 24px;
    --grid-gap: 32px;
    --column-unit: 100px;
    --section-spacing: 64px;
  }
}

@media (max-width: 480px) {
  :root {
    --layout-padding: 24px;
    --body-padding: 12px;
    --grid-gap: 32px;
    --section-spacing: 32px;
  }
}

/* Global styles */
body {
  background-color: #1a1a1a;
  margin: 0;
  padding: 0;
  padding-bottom: 60px;
  width: 100%;
  overflow-x: hidden;
  font-family: 'SourceHanSerifCN', sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Video Section */
.video-section {
  width: 100%;
  margin-bottom: var(--section-spacing);
}

.intro {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.intro__video {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  z-index: -1;
}

.intro__gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, #1a1a1a, transparent);
  z-index: 0;
}

.intro__head {
  position: absolute;
  top: 50%;
  left: var(--body-padding);
  transform: translateY(-50%);
  text-align: left;
  z-index: 1;
  max-width: calc(100% - 2 * var(--body-padding));
}

@media (min-width: 820px) {
  .intro__head {
    left: var(--layout-padding);
    max-width: calc(100% - 2 * var(--layout-padding));
  }
}



.intro__title {
  font-size: 60px;
  color: white;
  margin: 0;
  text-transform: uppercase;
}

@media (min-width: 820px) {
  .intro__title {
    font-size: 96px;
  }
}

@media (max-width: 480px) {
  .intro__title {
    font-size: 8vw;
  }
}

.intro__desc {
  font-weight: 300;
  font-size: 32px;
  color: white;
  margin: 8px 0 0;
}

@media (min-width: 820px) {
  .intro__desc {
    font-size: 36px;
  }
}

@media (max-width: 480px) {
  .intro__desc {
    font-size: 5vw;
  }
}

/* Description Section */
.description-section {
  width: 100%;
  margin: 0 var(--body-padding) var(--section-spacing);
  box-sizing: border-box;
}

@media (min-width: 820px) {
  .description-section {
    margin: 0 var(--layout-padding) var(--section-spacing);
  }
}

.description__content {
  max-width: calc(100% - 2 * var(--body-padding));
}

@media (min-width: 820px) {
  .description__content {
    max-width: calc(100% - 2 * var(--layout-padding));
  }
}

.description__text {
  font-weight: 300;
  font-size: 20px;
  color: #fff;
  margin: 0 0 12px;
  white-space: pre-line;
}

@media (min-width: 820px) {
  .description__text {
    font-size: 20px;
    margin: 0 0 16px;
  }
}

@media (max-width: 480px) {
  .description__text {
    font-size: 4vw;
    margin: 0 0 8px;
  }
}

.description__button {
  font-size: 16px;
  color: white;
  background-color: rgba(207, 114, 27, 0.7);
  border: none;
  padding: 2px 6px;
  margin: 0;
  cursor: pointer;
  border-radius: 2px;
  display: inline-block;
}

@media (min-width: 820px) {
  .description__button {
    font-size: 18px;
    padding: 3px 8px;
  }
}

@media (max-width: 480px) {
  .description__button {
    font-size: 4vw;
    padding: 2px 4px;
  }
}

.intro__modal {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: white;
  padding: 20px;
  z-index: 1000;
  width: 80%;
  max-width: 600px;
  max-height: 66.67vh;
  overflow-y: auto;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  scrollbar-width: thin;
  scrollbar-color: #cf721b #f0f0f0;
  box-sizing: border-box;
}

.intro__modal::-webkit-scrollbar {
  width: 8px;
}

.intro__modal::-webkit-scrollbar-track {
  background: #f0f0f0;
}

.intro__modal::-webkit-scrollbar-thumb {
  background: #cf721b;
  border-radius: 4px;
}

.intro__modal.active {
  display: block;
}

.intro__modal-content {
  font-size: 16px;
  color: #333;
  margin: 0;
  white-space: pre-line;
}

@media (min-width: 820px) {
  .intro__modal-content {
    font-size: 18px;
  }
}

@media (max-width: 480px) {
  .intro__modal-content {
    font-size: 4vw;
  }
}

.modal__close {
  position: absolute;
  top: 10px;
  right: 10px;
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: #333;
}

/* Works Section */
.works-section {
  width: 100%;
  padding-bottom: 322px;
  background-color: #1a1a1a;
  box-sizing: border-box;
}

@media (min-width: 820px) {
  .works-section {
    padding-bottom: 480px;
  }
}

@media (max-width: 480px) {
  .works-section {
    padding-bottom: 200px;
  }
}

.photos {
  margin: 0 var(--body-padding);
}

@media (min-width: 820px) {
  .photos {
    margin: 0 var(--layout-padding);
  }
}

.photos__head {
  text-align: left;
}

.photos__title {
  font-size: 24px;
  text-transform: uppercase;
  margin: 0 0 24px;
  color: #fff;
}

@media (min-width: 820px) {
  .photos__title {
    font-size: 36px;
    margin: 0 0 32px;
  }
}

@media (max-width: 480px) {
  .photos__title {
    font-size: 6vw;
    margin: 0 0 16px;
  }
}

.photos__grid {
  width: 100%;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  display: flex;
  flex-wrap: wrap;
  gap: var(--grid-gap);
}

/* Contact Section */
.contact {
  width: 100%;
  padding: 16px var(--body-padding);
  background-color: rgba(207, 114, 27, 0.7);
  text-align: center;
  position: fixed;
  bottom: 0;
  left: 0;
  z-index: 1000;
}

@media (min-width: 820px) {
  .contact {
    padding: 16px var(--body-padding);
  }
}

.contact__head {
  font-family: 'SourceHanSerifCN', sans-serif;
  color: white;
}

.contact__desc {
  font-weight: 300;
  font-size: 14px;
  margin: 0;
  color: white;
}

@media (min-width: 820px) {
  .contact__desc {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .contact__desc {
    font-size: 3.5vw;
  }
}

/* —— fix 瀑布流左右空白过宽 —— */
.photos__grid {
  /* 强制宽度撑满父容器，将原来 calc(100% - 2*padding) 恢复为 100% */
  width: 100% !important;
  /* 去掉左右 margin，保留 .photos 的那一份间距 */
  margin: 0 !important;
}

/* 大屏时也是同样逻辑 */
@media (min-width: 820px) {
  .photos__grid {
    width: 100% !important;
    margin: 0 !important;
  }
}