/* ============== 关于我们专属样式（基于设计稿 2关于我们.png） ============== */

.ab-hero{position:relative;min-height:620px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#fff;overflow:hidden;background:#0b1226 center/cover no-repeat;padding:120px 0 80px}
.ab-hero::before{content:"";position:absolute;inset:0; }
.ab-hero__inner{position:relative;z-index:2;width:100%;max-width:var(--w);margin:0 auto;padding:0 16px}
.ab-hero h1{margin:0;font-size:clamp(32px,5vw,64px);color:#fff;text-shadow:0 4px 24px rgba(0,0,0,.35)}
.ab-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;width:100%;max-width:var(--w);margin:60px auto 0;padding:0 16px;position:relative;z-index:2}
.ab-stats li{padding:20px 10px;text-align:center;background:transparent;border-radius:0;box-shadow:none;transition:transform .3s}
.ab-stats li:not(:first-child){border-left:1px solid rgba(255,255,255,.25)}
.ab-stats li:hover{transform:translateY(-6px)}
.ab-stats b{display:block;font-size:clamp(48px,8vw,90px);line-height:1;color:#fff;font-weight:800}
.ab-stats b small{font-size:18px;font-weight:600;margin-left:2px;color:#fff}
.ab-stats span{display:block;margin-top:10px;font-size:15px;color:#fff; margin-left: 19px;}

.ab-intro{display:grid;grid-template-columns:1fr 1.15fr;gap:48px;align-items:center}
.ab-intro__txt h2{font-size:clamp(24px,3vw,34px);margin-bottom:6px;color:var(--c-title)}
.ab-intro__txt .en{color:var(--c-sub);line-height: 22px;}
.ab-intro__txt p{color:var(--c-sub);margin-bottom: 2em}
.ab-intro__pic img{width: 100%; }
/* 图片靠右放大：大屏下延伸至视口右边缘 */
@media (min-width:1400px){
  .ab-intro__pic{margin-right:calc((100vw - 1400px)/-2)}
}

/* ============ 使命 / 愿景 / 价值观 ============ */
.ab-mv{
  position:relative;overflow:hidden;color:var(--c-text);
  background:#eef3fa center/cover no-repeat;
  --mv-side:clamp(58px,6.4vw,88px);
  --mv-radius:10px;
  --mv-blue:#0b6cf5;
}
.ab-mv .container{position:relative;z-index:1}
.ab-mv .head .en{color:var(--c-sub)}

.ab-mv__grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr)) var(--mv-side);grid-auto-rows:minmax(248px,auto);gap:22px}

/* 卡片：默认透明，仅露出浅蓝编号；滚动进入视口时从下往上浮现白色面板 */
.ab-mv__card{
  position:relative;overflow:hidden;
  display:grid;grid-template-columns:0 minmax(0,1fr);
  align-content:center;align-items:center;column-gap:clamp(12px,1.6vw,20px);
  padding:clamp(22px,2.2vw,32px) clamp(24px,2.8vw,40px);
  border-radius:var(--mv-radius);
  background:rgba(255,255,255,0);
  transition:opacity .7s ease,box-shadow .4s ease,transform .7s ease;
}
/* 内容层级置于白色面板之上 */
.ab-mv__card > *{position:relative;z-index:1}
.ab-mv__card--wide{grid-column:1 / -1}

/* 白色磨砂面板层：默认收在卡片底部，滚动进入视口时从下往上滑入 */
.ab-mv__card::before{
  content:"";position:absolute;inset:0;z-index:0;
  border-radius:var(--mv-radius);
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  transform:translateY(100%);
  transition:transform .55s cubic-bezier(.22,.61,.36,1);
}

/* 默认隐藏白色正文，仅留编号水印作为提示 */
.ab-mv__card .ab-mv__body{
  opacity:0;transform:translateY(26px);
  transition:opacity .45s ease,transform .45s cubic-bezier(.22,.61,.36,1);
}

/* 滚动进入视口（.is-in）/ 键盘聚焦：面板从下往上浮现，内容随之自下而上淡入 */
.ab-mv__card.is-in,.ab-mv__card:focus-within{box-shadow:0 24px 58px rgba(10,28,66,.2)}
.ab-mv__card.is-in::before,.ab-mv__card:focus-within::before{transform:translateY(0)}
.ab-mv__card.is-in .ab-mv__body,.ab-mv__card:focus-within .ab-mv__body{
  opacity:1;transform:translateY(0);
  transition-delay:.12s;
}

/* 左侧超大浅蓝编号水印：作为衬底与首行英文标签错位叠压 */
.ab-mv__num{
  position:relative;z-index:0;align-self:start;margin:-30px 0 0 -35px;
  white-space:nowrap;overflow:visible;pointer-events:none;user-select:none;
  font-size: clamp(64px,6vw,84px);font-weight:800;line-height:1;letter-spacing:-.02em;
  color:rgba(11,108,245,.08);font-family:"DIN Alternate","Arial Black",Arial,sans-serif;
}

/* 与 01 / 02 同排、位于其后的侧边艺术字标签：蓝底白字，文字逆时针旋转 90° */
.ab-mv__side{
  position:relative;
  display:flex;align-items:center;justify-content:flex-end;
  padding-right:clamp(8px,1vw,12px);
  writing-mode:horizontal-tb;letter-spacing:.24em;
  font-size: 46px;font-weight:700;line-height:1;
  color:rgba(255,255,255,.72);text-shadow:0 2px 10px rgba(4,40,96,.18);
  border-radius:var(--mv-radius);
  background:linear-gradient(160deg,#2b86ff 0%,var(--mv-blue) 55%,#0550c4 100%);
  box-shadow:0 18px 40px rgba(11,108,245,.26);
  overflow:hidden;isolation:isolate;cursor:default;
  transition:opacity .7s ease,box-shadow .4s ease,transform .4s ease;
}
/* 艺术字本体：盒子宽度与行高一致（1em），文字在盒内水平居中后整体逆时针旋转 90°，
   旋转后恰好贴左侧、垂直居中，且不会被裁剪 */
.ab-mv__side__txt{
  display:flex;justify-content:center;align-items:center;
  width:1em;white-space:nowrap;
  transform:rotate(-90deg);transform-origin:center;
}
/* 蓝块内的斜向高光，避免大面积纯色发闷 */
.ab-mv__side::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(115deg,rgba(255,255,255,.24) 0%,rgba(255,255,255,0) 44%);
}
.ab-mv__side:hover,.ab-mv__side:focus,.ab-mv__side:focus-visible{box-shadow:0 24px 54px rgba(11,108,245,.42);transform:translateY(-4px)}

/* 正文区 */
.ab-mv__body{min-width:0; margin-left: 20px;}
.ab-mv__body .tags{display:block;font-size:24px;font-weight:800;letter-spacing:2px;text-transform:uppercase;color:var(--mv-blue)}
.ab-mv__body h3{margin:20px 0 10px;font-size:20px;color:var(--c-title)}
.ab-mv__body p{margin:0;max-width:820px;font-size:13.5px;line-height:1.9;color:var(--c-sub)}

.ab-mv__cta{display:flex;justify-content:center;margin-top:32px}

/* ============ 荣誉资质 ============ */
.ab-honor{padding-bottom:0}
.ab-honors{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:73px}
.ab-honors li{
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  min-height:176px;padding:28px 18px;text-align:center;
  transition:transform .3s,box-shadow .3s;
}
/* 卡片底图：以 <img> 写在 HTML 里，路径相对页面（./img/），避免 CSS 相对路径问题
   object-fit:contain —— 底图为 674x224 的月桂枝，cover 会被横向裁掉，导致图形看不见 */
.ab-honors__bg{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:contain;pointer-events:none;
  opacity:1;transition:opacity .3s ease;
}
.ab-honors li:hover{transform:translateY(-6px);}
.ab-honors li:hover .ab-honors__bg{opacity:.76}
.ab-honors li > *:not(.ab-honors__bg){position:relative;z-index:1}
.ab-honors__badge{display:flex;align-items:center;justify-content:center;gap:12px;min-height:50px}
.ab-honors__badge {font-size:34px;line-height:1;letter-spacing:.5px;color:#BD9448}
.ab-honors__badge::after{transform:scaleX(-1)}
.ab-honors__name{line-height:1.6;font-size: 15px;color: #BD9448;}

/* 蓝色分隔线 + 证书轮播 */
.ab-honor__band{padding:0 0 64px;}
.ab-certs{position:relative}
/* 不使用 scroll-snap：强制吸附会把圆点的目标位置吸回图片边缘，导致末尾圆点滑不动 */
.ab-certs__track{display:flex;overflow-x:auto;padding:4px 2px 10px;cursor:grab;-ms-overflow-style:none;scrollbar-width:none}
.ab-certs__track.is-dragging{cursor:grabbing}
.ab-certs__track::-webkit-scrollbar{display:none}
.ab-certs__track img + img{margin-left:40px}
.ab-certs__track img{flex:0 0 auto;width:calc((100% - 160px)/5);height:auto;aspect-ratio:220/300;padding:6px;object-fit:contain;background:#fff;user-select:none;-webkit-user-drag:none;cursor:zoom-in}
.ab-certs__dots{display:flex;justify-content:center;gap:10px;margin-top:24px}
.ab-certs__dots button{width:10px;height:10px;padding:0;border:0;border-radius:999px;background:#cfd9ee;cursor:pointer;transition:.25s}
.ab-certs__dots button:hover{background:#a9b7d6}
.ab-certs__dots button.is-active{background:var(--c-primary)}
/* 内容不足一屏时用 auto 外边距居中；超出时用 justify-content:center 会让左侧溢出无法滚动 */
.ab-certs__track::before,.ab-certs__track::after{content:"";flex:0 0 auto;margin-left:auto;margin-right:auto}

/* 证书灯箱（点击放大） */
.ab-lightbox{position:fixed;inset:0;z-index:999;display:flex;align-items:center;justify-content:center;padding:24px;background:rgba(10,16,30,.82);opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;cursor:zoom-out}
.ab-lightbox.is-open{opacity:1;visibility:visible}
.ab-lightbox__img{max-width:92vw;max-height:88vh;width:auto;height:auto;object-fit:contain;background:#fff;padding:12px;border-radius:12px;box-shadow:0 24px 60px rgba(0,0,0,.5);cursor:default}
.ab-lightbox__close{position:absolute;top:18px;right:18px;width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:0;border-radius:10px;background:rgba(255,255,255,.12);color:#fff;cursor:pointer;transition:.2s}
.ab-lightbox__close:hover{background:rgba(255,255,255,.22)}
.ab-lightbox__close svg{width:22px;height:22px}

.ab-msg{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.ab-msg__txt h2{font-size:clamp(22px,2.8vw,32px);margin-bottom:14px}
.ab-msg__txt p{color:var(--c-sub)}
.ab-msg__info{margin-top:22px}
.ab-msg__info li{display:flex;gap:10px;margin-bottom:10px;font-size:15px}
.ab-msg__info b{color:var(--c-title)}
.ab-msg__form{padding:30px;background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
.ab-msg__form .form__row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.ab-msg__form input,.ab-msg__form textarea{width:100%;padding:12px 14px;font-size:14px;color:var(--c-text);border:1px solid var(--c-line);border-radius:10px;background:#fff;transition:border-color .2s,box-shadow .2s}
.ab-msg__form input:focus,.ab-msg__form textarea:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,78,216,.12)}
.ab-msg__form textarea{min-height:110px;resize:vertical;margin-bottom:16px}
.ab-msg__form .btn{width:100%;justify-content:center;border:0;cursor:pointer}
.ab-msg__form .form__msg{margin-top:12px;font-size:13.5px;color:#0f9d58;text-align:center}

@media (max-width:1080px){
  .ab-intro,.ab-mv__grid,.ab-msg{grid-template-columns:1fr}
  .ab-mv__card--wide{grid-column:auto}
  /* 单列时竖排标签改为整行横排，艺术字取消旋转并居中 */
  .ab-mv__side{writing-mode:horizontal-tb;min-height:78px;padding:18px 20px;justify-content:center}
  .ab-mv__side__txt{transform:none;transform-origin:center;width:auto}
  .ab-honors{grid-template-columns:repeat(2,1fr);gap:26px 14px}
}

/* 触屏无悬停设备：直接常显白色面板与内容 */
@media (hover:none){
  .ab-mv__card::before{transform:translateY(0)}
  .ab-mv__card .ab-mv__body{opacity:1;transform:none}
}
@media (max-width:900px){
  .ab-hero{min-height:520px;padding:100px 0 60px}
  .ab-hero__inner{padding-top:0}
  .ab-stats{grid-template-columns:repeat(2,1fr);margin-top:40px}
  .ab-stats li:nth-child(odd){border-left:0}
  .ab-mv__cta{justify-content:flex-start}
  .ab-msg__form .form__row{grid-template-columns:1fr}
}
@media (max-width:640px){
  .ab-stats{grid-template-columns:repeat(2,1fr);gap:16px;margin-top:40px}
  .ab-stats b{font-size:clamp(40px,12vw,60px)}
  .ab-stats span{font-size:13px}
  .ab-mv__grid{grid-auto-rows:minmax(190px,auto);gap:16px}
  .ab-mv__card{padding:22px 18px;column-gap:12px}
  .ab-mv__body h3{font-size:18px}
  .ab-mv__num{font-size:clamp(40px,9vw,52px);margin-top:-4px}
  .ab-mv{--mv-side:46px}
  .ab-mv__side{font-size:15px;letter-spacing:.2em}
  .ab-honors{gap:18px 10px;margin-bottom:44px}
  .ab-honors li{min-height:150px;padding:22px 12px}
  .ab-honors__badge{min-height:42px;gap:8px}
  .ab-honors__badge b{font-size:26px}
  .ab-honors__badge::before,.ab-honors__badge::after{width:18px;height:34px}
  .ab-honors__name{font-size:13.5px}
  .ab-honor__band{padding:40px 0 48px}
  .ab-certs__track{gap:0}
  .ab-certs__track img + img{margin-left:16px}
  .ab-certs__track img{width:calc((100% - 16px)/2);height:auto;aspect-ratio:220/300}
}