/*!
 * home.css — 首页 6 屏全屏滑动布局
 */

/* ---------- 滑动容器 ---------- */
.center .swiper-container {
  height: 100vh;
  /* 移动端地址栏收起/展开时，100dvh 比 100vh 更准确 */
  height: 100dvh;
}

.center .swiper-container-vertical > .swiper-pagination-bullets {
  right: 20px;
}

.center .swiper-pagination-bullet {
  width: 10px;
  height: 10px;
  background: #fff;
  opacity: 0.6;
}

.center .swiper-pagination-bullet:focus-visible {
  outline: 2px solid #dd0000;
  outline-offset: 4px;
}

.center .swiper-pagination-bullet-active {
  background: #dd0000;
  opacity: 1;
}

/* ---------- 每一屏背景 ---------- */
.center .swiper-container .bg {
  width: 100%;
  height: 100vh;
  height: 100dvh;
  position: relative;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.center .swiper-container .bg1 {
  background-color: #000;
  background-image: none;
}

.center .swiper-container .bg2 {
  background-image: url("../assets/images/02.jpg");
}

.center .swiper-container .bg3 {
  background-image: url("../assets/images/03.jpg");
}

.center .swiper-container .bg4 {
  background-image: url("../assets/images/04.jpg");
}

.center .swiper-container .bg5 {
  background-image: url("../assets/images/05.jpg");
}

.center .swiper-container .bg6 {
  background-image: url("../assets/images/06.jpg");
}

/* ---------- 首屏视频 ---------- */
.center .bg1 .video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

/* 视频播放结束 / 加载失败后，显示首屏背景图并隐藏视频 */
.center .swiper-container .bg1.show-bg {
  background-image: url("../assets/images/01.jpg");
}

.center .swiper-container .bg1.show-bg .video {
  display: none;
}

/* ---------- 文案容器 ---------- */
.center .swiper-container .no {
  height: 100vh;
  height: 100dvh;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-pack: center;
  -ms-flex-direction: column;
  flex-direction: column;
  justify-content: center;
}

.center .swiper-container .no span {
  display: block;
  color: #fff;
}

.center .swiper-container .no .big {
  font-size: 36pt;
}

.center .swiper-container .no .small {
  font-size: 18pt;
  padding: 15px 0;
}

.center .swiper-container .no button {
  background: transparent;
  color: #fff;
  font-family: inherit;
  border: 1px solid #fff;
  font-size: 18pt;
  padding: 9px 55px;
  align-self: flex-start;
  cursor: pointer;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.center .swiper-container .no button:hover,
.center .swiper-container .no button:focus-visible {
  background: rgba(255, 255, 255, 0.14);
}

.center .swiper-container .no button:focus-visible {
  outline: 2px solid #dd0000;
  outline-offset: 3px;
}

/* 首屏：标题图 + 居中文案 */
.center .swiper-container .no1 {
  position: relative;
  z-index: 9;
  width: 100%;
  box-sizing: border-box;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

.center .swiper-container .no1 .hero-title {
  margin: 0;
  display: block;
  line-height: 0;
}

.center .swiper-container .no1 img {
  width: 400px;
  height: 64px;
  max-width: 80vw;
  display: block;
  object-fit: contain;
}

.center .swiper-container .no1 .small {
  /* 副标题是居中的收缩块；width:100% 会让文字从视口左缘开始 */
  width: auto;
  max-width: 100%;
}

.center .swiper-container .no1 button {
  align-self: center;
}

/* 第 2–6 屏：右半幅文字区
 * 第 3/5 屏使用 no3/no5 语义类名，统一按右半幅位置排版。
 */
.center .swiper-container .no2,
.center .swiper-container .no3,
.center .swiper-container .no4,
.center .swiper-container .no5,
.center .swiper-container .no6 {
  width: calc(50% - 50px);
  position: relative;
  left: 50%;
}

.center .swiper-container .no2 .small,
.center .swiper-container .no3 .small,
.center .swiper-container .no4 .small,
.center .swiper-container .no5 .small,
.center .swiper-container .no6 .small {
  width: 100%;
}

/* 第 6 屏：地址与邮箱、邮箱与按钮之间保留 15px 间距。 */
.center .swiper-container .no6 .small {
  padding-bottom: 0;
}

.center .swiper-container .no6 .small a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.center .swiper-container .no6 .small a:hover {
  color: #fff;
}

.center .swiper-container .no6 .small a:focus-visible {
  outline: 2px solid #dd0000;
  outline-offset: 3px;
}

.center .swiper-container .no6 button {
  margin-top: 15px;
  margin-bottom: 15px;
}

/* ---------- 底部备案 ---------- */
#beian {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  box-sizing: border-box;
  position: absolute;
  bottom: 20px;
  bottom: calc(20px + env(safe-area-inset-bottom));
  color: #fff;
  white-space: normal;
  z-index: 9;
  font-size: 11pt;
}

#beian a {
  color: #fff;
  text-decoration: none;
  white-space: normal;
  display: inline-block;
}

#beian a:hover {
  cursor: pointer;
  text-decoration: underline;
}

#beian img {
  vertical-align: middle;
}

/* ---------- 小屏适配 ---------- */
@media (max-width: 768px) {
  .center .swiper-container .no .big {
    font-size: 28pt;
  }

  .center .swiper-container .no .small {
    font-size: 14pt;
    padding: 12px 0;
  }

  .center .swiper-container .no button {
    font-size: 14pt;
    padding: 8px 30px;
  }

  .center .swiper-container .no2,
  .center .swiper-container .no3,
  .center .swiper-container .no4,
  .center .swiper-container .no5,
  .center .swiper-container .no6 {
    width: calc(100% - 60px);
    left: 0;
    padding-left: 30px;
    padding-right: 30px;
  }

  .center .swiper-container .no1 {
    padding-left: 24px;
    padding-right: 24px;
  }

  .center .swiper-container .no1 img {
    width: 280px;
    height: auto;
  }

  .center .swiper-container .no6 .small {
    padding: 12px 0 0;
  }

  .center .swiper-container .no6 button {
    margin-top: 12px;
    margin-bottom: 12px;
  }

  #beian {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* ---------- 降级：JS 可用但 Swiper 未加载 ---------- */
.no-swiper body {
  overflow: auto;
}

.no-swiper .center .swiper-container {
  height: auto;
  overflow: visible;
}

.no-swiper .center .swiper-wrapper {
  display: block;
  transform: none !important;
}

.no-swiper .center .swiper-slide {
  height: 100vh;
  height: 100dvh;
}

.no-swiper .center .swiper-pagination {
  display: none;
}

.no-swiper .center .swiper-container .bg1 {
  background-image: url("../assets/images/01.jpg");
}

.no-swiper .center .swiper-container .bg1 .video {
  display: none;
}

.no-swiper #beian {
  position: static;
  padding: 20px 0;
  background: #000;
}

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .center .swiper-container .no button {
    transition: none;
  }
}