/* 关于我们页样式 */
/* 浅色 Banner（背景图 images/about/about_banner.jpg，右侧立方体已含在图内） */
.ab-banner{position:relative;overflow:hidden;display:flex;align-items:center;background:#eef1f6 url(../images/about/about_banner.jpg) center/cover no-repeat;min-height:clamp(260px,23vw,560px)}
.ab-banner::after{content:"";position:absolute;top:0;left:0;right:0;height:120px;background:linear-gradient(180deg,rgba(10,25,50,.45),transparent);z-index:1}
.ab-banner-inner{position:relative;z-index:2;max-width:var(--container);margin:0 auto;padding:clamp(110px,12vw,150px) var(--gutter) clamp(46px,5vw,72px);width:100%}
.ab-title{font-size:clamp(28px,3.6vw,48px);font-weight:700;color:#1d2733;line-height:1.55}
.ab-sub{margin-top:14px;font-size:clamp(14px,1.3vw,17px);color:#ec5421;letter-spacing:2px}

/* 公司简介 */
.ab-intro{background:#fff;padding:clamp(48px,5vw,60px) 0}
.ab-intro-inner{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.ab-sec-title{font-size:clamp(26px,2.6vw,36px);font-weight:600;color:#16233a;line-height:1.7;text-align:center}
.ab-sec-title::after{content:"";display:block;width:56px;height:3px;background:var(--main,#2b6cb0);margin:18px auto 0}
.ab-intro-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:clamp(28px,4vw,60px);align-items:center;margin-top:clamp(32px,4vw,56px)}
.ab-intro-img{border-radius:6px;overflow:hidden}
.ab-intro-img img{width:100%;height:100%;object-fit:cover;display:block}
.ab-intro-body{text-align: justify;}
.ab-intro-body p{font-size:15px;line-height:2.1;color:#5b6b82;text-indent:2em;margin-bottom:14px}
.ab-intro-body p:last-child{margin-bottom:0}
.ab-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:clamp(32px,4vw,56px);border-top:1px solid #eef2f6;padding-top:clamp(24px,3vw,36px)}
.ab-stat{text-align:center}
.ab-stat .ab-num{display:block;font-size:clamp(26px,2.6vw,36px);font-weight:700;color:#ec5421;line-height:1.2}
.ab-stat .ab-num i{font-style:normal;font-size:15px;font-weight:400;color:#ec5421;margin-left:3px}
.ab-stat .ab-label{display:block;margin-top:8px;font-size:13px;color:#7a8798}
@media (max-width:900px){
    .ab-intro-grid{grid-template-columns:minmax(0,1fr)}
    .ab-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
}

/* 业务体系 */
.ab-sys{background:#f6f8fb;padding:clamp(40px,5vw,68px) 0}
.ab-sys-inner{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.ab-sec-sub{margin:14px auto 0;max-width:720px;text-align:center;font-size:18px;line-height:1.9;color:#7a8798}
.ab-sys-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(20px,3vw,40px);margin-top:clamp(22px,4vw,32px)}
.ab-sys-card{background:#fff;border-radius:8px;box-shadow:0 8px 24px rgba(22,35,58,.06);overflow:hidden;transition:transform .3s,box-shadow .3s}
.ab-sys-card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(22,35,58,.12)}
.ab-sys-card-title{padding:clamp(16px,2vw,24px) clamp(20px,2.5vw,32px);font-size:clamp(17px,1.6vw,26px);font-weight:500;color:#000000;letter-spacing: 1px;background:linear-gradient(135deg,#e8f2fd 0%,#f5faff 100%);}
.ab-sys-card-title::before{ content:""; display:inline-block;width:7px;height:7px;border-radius:50%;background:#3a75ff;margin-right:10px;vertical-align:middle;
border:10px solid #dae6ff;}
.ab-sys-card-title::after{content:"";display:block;width:178px;height:2px;background:#3a75ff;margin-top:10px}
.ab-sys-list{list-style:none;margin:0;padding:clamp(20px,2.5vw,30px) clamp(20px,2.5vw,32px)}
.ab-sys-list li{position:relative;padding-left:18px;margin-bottom:18px}
.ab-sys-list li:last-child{margin-bottom:0}
.ab-sys-list li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:#3a75ff;}
.ab-sys-list h4{font-size:18px;font-weight:500;color:#212c37;margin-bottom:6px}
.ab-sys-list p{font-size:15px;line-height:1.9;color:rgba(33,44,55,0.74);}
@media (max-width:800px){.ab-sys-grid{grid-template-columns:minmax(0,1fr)}}

/* 定位与价值 */
.ab-value{position:relative;background:#1e63c8 url(../images/about/value_bg.jpg) center/cover no-repeat;padding:clamp(48px,5vw,60px) 0}
.ab-value::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,80,180,.55),rgba(16,64,148,.65));z-index:0}
.ab-value-inner{position:relative;z-index:1;max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.ab-value-title{font-size:clamp(22px,2.6vw,34px);font-weight:700;color:#fff;text-align:center;letter-spacing:2px}
.ab-value-sub{margin:14px auto 0;max-width:760px;text-align:center;font-size:clamp(13px,1.2vw,16px);line-height:1.9;color:rgba(255,255,255,.85)}
.ab-value-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,2.5vw,32px);margin-top:clamp(32px,4vw,52px)}
.ab-value-card{display:flex;flex-direction:column;background:#fff;border-radius:8px;padding:clamp(22px,2.5vw,32px) clamp(20px,2.5vw,30px);box-shadow:0 10px 26px rgba(9,38,84,.22);transition:transform .3s,box-shadow .3s}
.ab-value-card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(9,38,84,.3)}
.ab-value-card-title{display:flex;align-items:center;gap:12px;font-size:clamp(17px,1.6vw,26px);font-weight:500;color:#000000;}
.ab-value-no{font-size:clamp(22px,2.2vw,30px);font-weight:800;font-style:italic}
.no-blue{color:#006aed}
.no-gold{color:#d9a520}
.no-gray{color:#9aa6b5}
.ab-value-desc{margin-top:14px;font-size:15px;line-height:2;color:#5b6b82}
.ab-value-link{margin-top:auto;padding-top:18px;font-size:15px;color:#ec5622;transition:color .3s}
.ab-value-link i{font-style:normal;margin-left:4px;transition:transform .3s}
.ab-value-link:hover{color:#c74327}
.ab-value-link:hover i{transform:translateX(4px)}
@media (max-width:900px){.ab-value-grid{grid-template-columns:minmax(0,1fr)}}

/* 核心竞争优势 */
.ab-adv{background:#f6f7f9;padding:clamp(48px,5vw,60px) 0}
.ab-adv-inner{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.ab-adv-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(16px,2vw,28px);margin-top:clamp(32px,4vw,52px)}
.ab-adv-card{display:flex;flex-direction:column;align-items:center;text-align:center;background:#fff;border-radius:8px;padding:clamp(24px,2.5vw,34px) clamp(18px,2vw,26px);box-shadow:0 6px 18px rgba(22,35,58,.05);transition:transform .3s,box-shadow .3s}
.ab-adv-card:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(22,35,58,.12)}
.ab-adv-card-title{font-size:clamp(16px,1.5vw,26px);font-weight:500;color:#16233a}
.ab-adv-icon{width:clamp(52px,7vw,76px);height:auto;margin:clamp(14px,1.6vw,22px) 0}
.ab-adv-desc{font-size:15px;line-height:2;color:#5b6b82}
@media (max-width:900px){.ab-adv-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
/* 小屏保持 2 列：每格约 160px，需同步收窄卡片内边距、图标与字号，否则文字被挤成窄条 */
@media (max-width:560px){
.ab-adv-grid{gap:10px}
.ab-adv-card{padding:14px 10px}
.ab-adv-card-title{font-size:15px}
.ab-adv-icon{width:40px;margin:8px 0}
.ab-adv-desc{font-size:13px;line-height:1.7}
}

/* 团队协作 共创辉煌（专家轮播） */
.ab-team{background:#fff;padding:clamp(48px,5vw,60px) 0}
.ab-team-inner{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.ab-team-slider{position:relative;display:flex;align-items:center;gap:clamp(10px,2vw,24px);margin-top:clamp(32px,4vw,52px)}
.ab-team-nav{flex:none;width:40px;height:40px;margin:0;padding: 0; display: flex;align-items: center;justify-content: center; border:none;border-radius:50%;background:#eef1f5;color:#9aa6b5;font-size:26px;line-height:1;cursor:pointer;transition:background .3s,color .3s}
.ab-team-nav:hover{background:var(--main);color:#fff}
.ab-team-card{flex:1;display:grid;grid-template-columns:minmax(0,3fr) minmax(0,7fr);gap:clamp(20px,3vw,40px);align-items:center;background:#fff;padding:clamp(18px,2.5vw,30px) clamp(18px,2.5vw,30px) clamp(18px,2.5vw,30px) clamp(80px,2.5vw,120px);
    background: url(../images/kuang.png) center no-repeat;
    background-size: 100% auto;
}
.ab-team-photo{margin:0;border-radius:20px;overflow:hidden;background:#eef1f6}
/* object-fit:cover 默认按中心裁切，竖向溢出时会上下各裁一半，头部被切掉。
   显式指定 object-position 顶部，溢出只从底部裁，保证人物头像完整 */
.ab-team-photo img{width:100%;height:100%;aspect-ratio:3/4;object-fit:cover;object-position:center top;display:block}
.ab-team-name{display:inline-block;background:#006aed;color:#fff;font-size:14px;font-weight:500;padding:6px 32px;border-radius:24px;letter-spacing: 1px;}
.ab-team-cred{margin-top:14px;font-size:clamp(14px,1.4vw,18px);font-weight:normal;color:#006aed;line-height:1.7}
.ab-team-bio{margin-top:12px;font-size:15px;line-height:2;color:#000000}
.ab-team-btn{display:inline-block;margin-top:16px;padding:6px 16px;border:1px solid #e05a3a;border-radius:8px;color:#e05a3a;font-size:14px;transition:background .3s,color .3s}
.ab-team-btn:hover{background:#e05a3a;color:#fff}
.ab-team-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:16px}
.ab-team-btn{margin-top:0}
.ab-team-btn-ghost{border-color:#c8ced9;color:#556274}
.ab-team-btn-ghost:hover{background:#556274;border-color:#556274;color:#fff}
.ab-team-avatars{display:flex;justify-content:center;flex-wrap:wrap;gap:clamp(18px,1.6vw,36px);margin-top:clamp(26px,3vw,40px)}
.ab-team-avatar{width:clamp(52px,5vw,120px);height:clamp(52px,5vw,120px);padding:0;border:none;border-radius:50%;overflow:hidden;cursor:pointer;background:none;outline:3px solid transparent;outline-offset:3px;transition:outline-color .3s}
/* 圆形头像：真人形象照多为竖构图，居中裁切会把额头以上留白留在圆内、
   下巴以下裁掉，显得脸偏下。改为偏上取景，让脸部落在圆心 */
.ab-team-avatar img{width:100%;height:100%;object-fit:cover;object-position:center 15%;display:block;border-radius:50%}
.ab-team-avatar.is-active{outline-color:var(--main)}

/* 移动端：单列堆叠。
   框图 kuang.png 是 1214x318 的横向框（约 3.8:1），卡片变高后无法保持比例：
   沿用 100% auto 则框只盖住顶部一小截（断框），改 100% 100% 又会横向拉伸变形，
   故窄屏改用白底细边框卡片，与 .ab-sys-card / .ab-value-card 观感一致 */
@media (max-width:800px){
    .ab-team-card{
        grid-template-columns:minmax(0,1fr);
        gap:clamp(16px,4vw,24px);
        padding:clamp(16px,4vw,24px);
        background:#fff;
        border:1px solid #eef2f6;
        border-radius:8px;
    }
    .ab-team-photo{max-width:200px;margin:0 auto}
    .ab-team-nav{width:34px;height:34px;font-size:22px}
}
@media (max-width:560px){
    .ab-team-slider{gap:8px}
    .ab-team-nav{width:30px;height:30px;font-size:20px}
    .ab-team-photo{max-width:150px}
    .ab-team-name{padding:5px 22px;font-size:13px}
    .ab-team-bio{font-size:14px;line-height:1.9}
}

/* 合作伙伴 */
.ab-partner{background:#f5f6f8;padding:clamp(48px,5vw,60px) 0;overflow:hidden}
.ab-partner-inner{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.ab-partner-rows{margin-top:clamp(32px,4vw,52px);display:flex;flex-direction:column;gap:clamp(12px,1.6vw,20px)}
.ab-partner-row{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 clamp(120px,18vw,280px),#000 calc(100% - clamp(120px,18vw,280px)),transparent 100%);mask-image:linear-gradient(90deg,transparent 0,#000 clamp(120px,18vw,280px),#000 calc(100% - clamp(120px,18vw,280px)),transparent 100%)}
.ab-partner-row ul{list-style:none;margin:0;padding:0;display:flex;gap:clamp(12px,1.6vw,20px);width:max-content;animation:abMarquee 90s linear infinite}
.ab-partner-row--rev ul{animation-direction:reverse}
.ab-partner-row:nth-child(2) ul{animation-delay:-18s}
.ab-partner-row:nth-child(3) ul{animation-delay:-42s}
.ab-partner-row:nth-child(4) ul{animation-delay:-66s}
.ab-partner-row:hover ul{animation-play-state:paused}
.ab-partner-row li{flex:none;display:flex;align-items:center;justify-content:center;width:clamp(170px,16vw,230px);height:clamp(78px,7.5vw,104px);padding:12px 22px;background:#fff;border-radius:1px}
.ab-partner-row img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}
@keyframes abMarquee{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.ab-partner-row ul{animation:none}}
.ab-partner-desc{margin:clamp(24px,3vw,36px) auto 0;max-width:1200px;font-size:15px;line-height:2.1;color:#5b6b82}
@media (max-width:600px){.ab-partner-row ul{animation-duration:60s}}