/* 凯岸 AI 视频展示 v1.1.3
 * 目标：
 * 1. 外层圆角边框与主题 .container 宽度完全对齐（1180px / 两侧20px）。
 * 2. 单视频保持 9:16，不裁比例；桌面端等比例缩小。
 * 3. 左文案 + 中间竖屏视频 + 右案例说明，形成三段式平衡布局。
 */

.kaian-aiv{
  --kaian-ink:#10233f;
  --kaian-muted:#61758f;
  --kaian-line:#d7e8f8;
  --kaian-blue:#1688f7;
  width:100%;
  margin:0;
  padding:46px 0;
  border-top:1px solid rgba(220,234,250,.78);
  border-bottom:1px solid rgba(220,234,250,.78);
  background:
    radial-gradient(circle at 56% 34%,rgba(73,168,255,.07),transparent 38%),
    linear-gradient(180deg,#f7fbff 0%,#f2f8ff 100%);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  box-sizing:border-box;
}
.kaian-aiv *{box-sizing:border-box}

/* 与主题 .container 保持同宽 */
.kaian-aiv__inner{
  width:min(1180px,calc(100% - 40px));
  min-height:548px;
  margin:0 auto;
  padding:42px 48px;
  display:grid;
  grid-template-columns:238px minmax(0,1fr);
  gap:44px;
  align-items:center;
  position:relative;
  overflow:hidden;
  border:1px solid #cfe3f7;
  border-radius:14px;
  background:
    radial-gradient(circle at 15% 85%,rgba(45,151,255,.05),transparent 25%),
    linear-gradient(180deg,rgba(255,255,255,.96),rgba(252,254,255,.98));
  box-shadow:0 18px 48px rgba(41,96,151,.06);
}

/* 轻装饰，保持企业官网风格 */
.kaian-aiv__inner:after{
  content:"";
  position:absolute;
  width:160px;
  height:110px;
  right:18px;
  top:12px;
  opacity:.22;
  pointer-events:none;
  background-image:radial-gradient(circle,#8dc8ff 1.2px,transparent 1.2px);
  background-size:12px 12px;
  mask-image:linear-gradient(135deg,#000,transparent 75%);
}

.kaian-aiv__copy{
  position:relative;
  z-index:2;
  align-self:center;
}
.kaian-aiv__eyebrow{
  margin-bottom:15px;
  color:#0878ff;
  font-size:11px;
  line-height:1;
  letter-spacing:1.55px;
  font-weight:800;
}
.kaian-aiv__copy h2{
  margin:0 0 17px;
  color:var(--kaian-ink);
  font-size:34px;
  line-height:1.16;
  letter-spacing:-1px;
}
.kaian-aiv__copy h2:after{
  content:"";
  display:block;
  width:30px;
  height:2px;
  margin-top:16px;
  border-radius:999px;
  background:#1688f7;
}
.kaian-aiv__copy p{
  margin:0 0 24px;
  color:var(--kaian-muted);
  font-size:13px;
  line-height:1.95;
}
.kaian-aiv__main-play{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border:0;
  border-radius:9px;
  padding:12px 17px;
  background:linear-gradient(135deg,#087cf5,#20a2f4);
  color:#fff;
  font-size:12px;
  font-weight:800;
  box-shadow:0 12px 28px rgba(13,134,246,.18);
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease;
}
.kaian-aiv__main-play:hover{
  transform:translateY(-1px);
  box-shadow:0 15px 32px rgba(13,134,246,.23);
}

.kaian-aiv__cards{
  min-width:0;
  position:relative;
  z-index:2;
  display:grid;
  gap:18px;
}
.kaian-aiv__cards--1{grid-template-columns:1fr}
.kaian-aiv__cards--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.kaian-aiv__cards--3,.kaian-aiv__cards--4{grid-template-columns:repeat(2,minmax(0,1fr))}

.kaian-aiv__card{
  min-width:0;
  overflow:hidden;
  border:1px solid #d7e8f8;
  border-radius:14px;
  background:#fff;
  box-shadow:0 12px 30px rgba(39,98,159,.07);
}

/* 单视频：去掉“大白卡”边框，直接作为外框中的中+右两列 */
.kaian-aiv__cards--1 .kaian-aiv__card{
  display:grid;
  grid-template-columns:250px minmax(0,1fr);
  gap:42px;
  align-items:center;
  overflow:visible;
  border:0;
  border-radius:0;
  background:transparent;
  box-shadow:none;
}

/* 视频严格 9:16，并在桌面端缩小 */
.kaian-aiv__stage{
  position:relative;
  width:100%;
  aspect-ratio:9 / 16;
  overflow:hidden;
  border-radius:12px;
  background:#07192a;
  box-shadow:0 16px 34px rgba(20,54,88,.13);
}
.kaian-aiv__cards--1 .kaian-aiv__stage{
  width:250px;
  max-width:250px;
  aspect-ratio:9 / 16 !important;
  justify-self:center;
}
.kaian-aiv__stage video{
  display:block;
  width:100% !important;
  height:100% !important;
  aspect-ratio:9 / 16 !important;
  object-fit:cover !important;
  background:#07192a;
}
.kaian-aiv__overlay{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  border:0;
  background:transparent;
  cursor:pointer;
  transition:opacity .2s ease;
}
.kaian-aiv__overlay span{
  width:54px;
  height:54px;
  display:grid;
  place-items:center;
  padding-left:3px;
  border-radius:50%;
  background:rgba(255,255,255,.96);
  color:#0c7fec;
  font-size:18px;
  box-shadow:0 10px 28px rgba(0,0,0,.20);
}
.kaian-aiv__stage.is-playing .kaian-aiv__overlay{
  opacity:0;
  pointer-events:none;
}
.kaian-aiv__duration{
  position:absolute;
  right:9px;
  bottom:8px;
  z-index:3;
  padding:4px 7px;
  border-radius:5px;
  background:rgba(0,0,0,.7);
  color:#fff;
  font-size:10px;
  font-weight:700;
}

.kaian-aiv__info{
  padding:17px 18px 16px;
}
.kaian-aiv__info h3{
  margin:0 0 9px;
  color:var(--kaian-ink);
  font-size:17px;
  line-height:1.35;
}
.kaian-aiv__info p{
  margin:0 0 12px;
  color:#73859d;
  font-size:12px;
  line-height:1.7;
}
.kaian-aiv__tag{
  display:inline-block;
  padding:6px 10px;
  border-radius:999px;
  background:#e9f5ff;
  color:#1685ed;
  font-size:11px;
  font-weight:700;
}

/* 单视频右侧说明区域 */
.kaian-aiv__cards--1 .kaian-aiv__info{
  min-width:0;
  padding:8px 0 8px 0;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.kaian-aiv__cards--1 .kaian-aiv__info:before{
  content:"▣";
  width:48px;
  height:48px;
  margin-bottom:20px;
  display:grid;
  place-items:center;
  border:1px solid #cfe4fb;
  border-radius:50%;
  background:#fff;
  color:#1688f7;
  font-size:17px;
  box-shadow:0 8px 20px rgba(38,118,193,.10);
}
.kaian-aiv__cards--1 .kaian-aiv__info h3{
  margin:0 0 15px;
  color:var(--kaian-ink);
  font-size:25px;
  line-height:1.3;
  letter-spacing:-.35px;
}
.kaian-aiv__cards--1 .kaian-aiv__info h3:after{
  content:"";
  display:block;
  width:30px;
  height:2px;
  margin-top:16px;
  border-radius:999px;
  background:#1688f7;
}
.kaian-aiv__cards--1 .kaian-aiv__info p{
  max-width:500px;
  margin:0 0 17px;
  color:#60748f;
  font-size:13px;
  line-height:1.85;
}
.kaian-aiv__cards--1 .kaian-aiv__tag{
  display:block;
  width:100%;
  max-width:500px;
  padding:7px 12px;
}

/* 平板 */
@media(max-width:1000px){
  .kaian-aiv__inner{
    width:min(100% - 28px,1180px);
    min-height:auto;
    padding:34px;
    grid-template-columns:1fr;
    gap:30px;
  }
  .kaian-aiv__copy{
    max-width:680px;
  }
  .kaian-aiv__cards--1 .kaian-aiv__card{
    grid-template-columns:220px minmax(0,1fr);
    gap:32px;
  }
  .kaian-aiv__cards--1 .kaian-aiv__stage{
    width:220px;
    max-width:220px;
  }
}

/* 手机 */
@media(max-width:680px){
  .kaian-aiv{
    padding:28px 0;
  }
  .kaian-aiv__inner{
    width:calc(100% - 28px);
    padding:26px 20px;
    border-radius:12px;
  }
  .kaian-aiv__copy h2{
    font-size:30px;
  }
  .kaian-aiv__cards--1 .kaian-aiv__card{
    display:block;
  }
  .kaian-aiv__cards--1 .kaian-aiv__stage{
    width:min(100%,250px);
    max-width:250px;
    margin:0 auto;
  }
  .kaian-aiv__cards--1 .kaian-aiv__info{
    padding:26px 0 2px;
  }
  .kaian-aiv__cards--1 .kaian-aiv__info:before{
    width:42px;
    height:42px;
    margin-bottom:15px;
  }
  .kaian-aiv__cards--1 .kaian-aiv__info h3{
    font-size:22px;
  }
  .kaian-aiv__cards--2,
  .kaian-aiv__cards--3,
  .kaian-aiv__cards--4{
    grid-template-columns:1fr;
  }
}


/* v1.1.4：解决原生全屏不保持 9:16 的问题
   - 禁用页面内原生全屏按钮
   - 改为自定义竖屏大屏预览弹层
*/
.kaian-aiv .kaian-aiv__stage video::-webkit-media-controls-fullscreen-button{
  display:none !important;
}
.kaian-aiv .kaian-aiv__stage video::-webkit-media-controls-overflow-button{
  display:none !important;
}
.kaian-aiv__expand{
  position:absolute;
  top:10px;
  right:10px;
  z-index:4;
  width:34px;
  height:34px;
  border:1px solid rgba(255,255,255,.38);
  border-radius:10px;
  background:rgba(7,19,31,.54);
  color:#fff;
  font-size:16px;
  line-height:1;
  display:grid;
  place-items:center;
  cursor:pointer;
  backdrop-filter:blur(5px);
}
.kaian-aiv__expand:hover{
  background:rgba(7,19,31,.72);
}
.kaian-aiv-modal{
  position:fixed;
  inset:0;
  z-index:999999;
  display:none;
  align-items:center;
  justify-content:center;
  padding:24px;
}
.kaian-aiv-modal.is-open{
  display:flex;
}
.kaian-aiv-modal__backdrop{
  position:absolute;
  inset:0;
  background:rgba(2,9,18,.82);
  backdrop-filter:blur(6px);
}
.kaian-aiv-modal__dialog{
  position:relative;
  z-index:2;
  width:min(92vw,520px);
  padding:18px;
  border:1px solid rgba(255,255,255,.16);
  border-radius:18px;
  background:rgba(7,19,31,.96);
  box-shadow:0 26px 70px rgba(0,0,0,.42);
}
.kaian-aiv-modal__close{
  position:absolute;
  top:-12px;
  right:-12px;
  width:36px;
  height:36px;
  border:0;
  border-radius:50%;
  background:#fff;
  color:#18334e;
  font-size:24px;
  line-height:1;
  cursor:pointer;
  box-shadow:0 8px 22px rgba(0,0,0,.22);
}
.kaian-aiv-modal__video-wrap{
  width:min(100%,380px);
  margin:0 auto;
  aspect-ratio:9 / 16;
  border-radius:14px;
  overflow:hidden;
  background:#000;
}
.kaian-aiv-modal__video{
  width:100%;
  height:100%;
  display:block;
  aspect-ratio:9 / 16;
  object-fit:contain;
  background:#000;
}
body.kaian-aiv-modal-open{
  overflow:hidden;
}
@media(max-width:680px){
  .kaian-aiv-modal{
    padding:12px;
  }
  .kaian-aiv-modal__dialog{
    width:min(96vw,420px);
    padding:14px;
    border-radius:16px;
  }
  .kaian-aiv-modal__video-wrap{
    width:min(100%,320px);
  }
}