/** 响应式基本样式, 从小屏开始写 */
.yb-section-container {
  box-sizing: border-box;
  margin: 0 auto;
  width: 100%;
  padding: 0 16px;
}
.yb-section-title {
  text-align: center;
  font-size: 24px;
  line-height: 1.2;
  font-weight: 600;
  color: #02060B;
}

iframe {
    border: none;
}

.yb-section-title+.yb-section-description,
.yb-section-text-container:has(.yb-section-title)>.yb-single-video-btn,
.yb-section-text-container:has(.yb-section-description)>.yb-single-video-btn {
    margin-top: 16px;
}

.yb-single-video-btn {
    cursor: pointer;
    display: inline-block;
    background-color: #FEDB1E;
    padding: 13px 37px;
    border-radius: 30px;
    font-size: 16px;
    border-width: 0;
}

.yb-single-video-btn {
  display: inline-block;
  background-color: #FEDB1E;
  padding: 13px 37px;
  border-radius: 30px;
  font-size: 16px;
}

.yb-section-text-container {
  padding-bottom: 32px;
}

/* 标题文本共用样式 */
.yb-h1, .yb-h2, .yb-h3, .yb-h4 {
  margin-top: 0;
  line-height: 1.2;
  color: #02060B;
}

.yb-h1, .yb-h2 {
  font-weight: 800; /* ExtraBold */
}

.yb-h3, .yb-h4 {
  font-weight: 700; /* Bold */
}

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

/* 正文文本共用样式 */
.yb-body-1, .yb-body-2, .yb-body-3, .yb-body-4 {
  margin-top: 0;
  margin-bottom: 16px;
  font-weight: 400; /* Regular */
  line-height: 1.5;
  color: #676A6D;
}

.yb-block-title {
  font-size: 20px;
  line-height: 1.3;
  font-weight: 600;
  color: #000;
  margin-bottom: 12px;
}

.yb-block-description {
  font-size: 14px;
  line-height: 1.5;
  color: #02060B;
}

.yb-play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    border-radius: 50%;
    width: 64px;
    height: 64px;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.yb-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.yb-video-container {
    position: relative;
}

.yb-close-button {
    position: absolute;
    top: 40px;
    right: 16px;
    width: 48px;
    height: 48px;
    font-size: 30px;
    border-radius: 50%;
    background: #000;
    justify-content: center;
    align-items: center;
    display: flex;
    color: white;
    cursor: pointer;
}

.yb-video-frame {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
    border: none;
}

/* 375-679px */
@media (max-width: 679px) {
  .yb-section-title + .yb-section-description {
    font-size: 14px;
    margin-top: 12px;
  }
  .yb-single-video-btn {
    width: 100%;
    text-align: center;
    padding: 13px 0;
  }
  .yb-h1 {
    font-size: 30px;
  }
  .yb-h2 {
    font-size: 24px;
  }
  .yb-h3 {
    font-size: 20px;
  }
  .yb-h4 {
    font-size: 18px;
  }
  .yb-body-1 {
    font-size: 20px;
  }
  .yb-body-2 {
    font-size: 16px;
  }
  .yb-body-3 {
    font-size: 14px;
  }
  .yb-body-4 {
    font-size: 12px;
  }
}

/* 680-959px */
@media (min-width: 680px) and (max-width: 959px) {
  .yb-section-container {
    padding: 0 24px;
  }
  .yb-section-title {
    font-size: 26px;
  }
  .yb-section-title + .yb-section-description {
    font-size: 16px;
  }

  .yb-block-title {
    font-size: 24px;
    line-height: 1.3;
    margin-bottom: 16px;
  }

  .yb-block-description {
    font-size: 16px;
    line-height: 1.5;
  }

  .yb-play-button {
    width: 80px;
    height: 80px;
    font-size: 29px;
  }

  .yb-close-button {
    top: 56px;
    right: 30px;
    width: 56px;
    height: 56px;
    font-size: 38px;
  }

  .yb-h1 {
    font-size: 36px;
  }
  .yb-h2 {
    font-size: 32px;
  }
  .yb-h3 {
    font-size: 24px;
  }
  .yb-h4 {
    font-size: 20px;
  }
  .yb-body-1 {
    font-size: 18px;
  }
  .yb-body-2 {
    font-size: 16px;
  }
  .yb-body-3 {
    font-size: 14px;
  }
}

/* 960-1439px */
@media (min-width: 960px) and (max-width: 1439px) {
  .yb-section-container {
    width: 900px;
    padding: 0;
  }
  .yb-section-title {
    font-size: 28px;
  }
  .yb-section-title + .yb-section-description {
    font-size: 16px;
  }
  .yb-section-text-container {
    padding-bottom: 48px;
  }
  .yb-block-title {
    font-size: 24px;
    line-height: 1.3;
    margin-bottom: 24px;
  }

  .yb-block-description {
    font-size: 14px;
    line-height: 1.5;
  }

  .yb-play-button {
    width: 80px;
    height: 80px;
    font-size: 29px;
  }
  
  .yb-video-container {
    width: 564px;
    height: 317px;
  }

  .yb-close-button {
    top: 48px;
    right: 48px;
    width: 48px;
    height: 48px;
    font-size: 30px;
  }

  .yb-h1 {
    font-size: 30px;
  }
  .yb-h2 {
    font-size: 28px;
  }
  .yb-h3 {
    font-size: 24px;
  }
  .yb-h4 {
    font-size: 20px;
  }
  .yb-body-1 {
    font-size: 18px;
  }
  .yb-body-2 {
    font-size: 16px;
  }
  .yb-body-3 {
    font-size: 14px;
  }
}

/* 1440-1919px */
@media (min-width: 1440px) and (max-width: 1919px) {
  .yb-section-container {
    width: 1200px;
    padding: 0;
  }
  .yb-section-title {
    font-size: 36px;
  }
  .yb-section-title + .yb-section-description {
    font-size: 18px;
  }
  .yb-section-text-container {
    padding-bottom: 56px;
  }
  .yb-block-title {
    font-size: 28px;
    line-height: 1.3;
    margin-bottom: 24px;
  }

  .yb-block-description {
    font-size: 16px;
    line-height: 1.6;
  }

  .yb-play-button {
    width: 88px;
    height: 88px;
    font-size: 32px;
  }

  .yb-video-container {
    width: 856px;
    height: 481px;
  }

  .yb-h1 {
    font-size: 40px;
  }
  .yb-h2 {
    font-size: 36px;
  }
  .yb-h3 {
    font-size: 28px;
  }
  .yb-h4 {
    font-size: 22px;
  }
  .yb-body-1 {
    font-size: 18px;
  }
  .yb-body-2 {
    font-size: 16px;
  }
  .yb-body-3 {
    font-size: 14px;
  }
}

/* 1920px+ */
@media (min-width: 1920px) {
  .yb-section-container {
    width: 1400px;
    padding: 0;
  }

  .yb-section-title {
    font-size: 40px;
  }

  .yb-section-title + .yb-section-description {
    font-size: 18px;
  }

  .yb-section-text-container {
    padding-bottom: 64px;
  }

  .yb-block-title {
    font-size: 32px;
    line-height: 1.3;
    margin-bottom: 24px;
  }

  .yb-block-description {
    font-size: 18px;
    line-height: 1.6;
  }

  .yb-play-button {
    width: 88px;
    height: 88px;
    font-size: 32px;
  }

  .yb-video-container {
    width: 1200px;
    height: 675px;
  }

  .yb-h1 {
    font-size: 48px;
  }
  .yb-h2 {
    font-size: 40px;
  }
  .yb-h3 {
    font-size: 32px;
  }
  .yb-h4 {
    font-size: 24px;
  }
  .yb-body-1 {
    font-size: 20px;
  }
  .yb-body-2 {
    font-size: 18px;
  }
  .yb-body-3 {
    font-size: 16px;
  }
  .yb-body-4 {
    font-size: 14px;
  }
}
.pc-hidden, .mobile-hidden {
  display: none;
}
@media screen and (max-width: 959px) {
  .mobile-hidden {
    display: block;
  }
  .yb-video-container {
    width: 100%;
  }
}
@media screen and (min-width: 960px) {
  .pc-hidden {
    display: block;
  }
}

@media screen and (min-width: 1440px) {
  .yb-close-button {
    top: 56px;
    right: 56px;
    width: 56px;
    height: 56px;
    font-size: 38px;
  }
}