/* =========================================================
   阿尔泰科技 · about.css
   关于我们页面专属样式（按 1920 设计稿 1:1 还原）
   设计稿关键数值（1920 宽）:
     内容区     1600 (左 161 / 右 1759)
     公司介绍   790-1647  标题 46px 副标题 26px 蓝
     企业文化   1648-2447 (800 高, 山峰图)
     荣誉资质   2448-3247 卡片 363x330 间距 48
     页脚       3248-3954
   前缀: art-
   ========================================================= */

/* =========================================================
   一、公司介绍模块  设计稿: 790-1647
   标题 902 / 副标题 972 / 正文 1052 / 数字 1460 / 标签 1514
   ========================================================= */
.art-aboutus-intro { position: relative; padding: 106px 0 116px; background-color: #fff; overflow: hidden;}
/* 底部淡灰羽毛/波浪点状底纹（设计稿 y1528-1647，全宽 120 高） */
.art-aboutus-intro::after { content: ''; position: absolute; left: 0; bottom: 0; width: 100%; height: 120px; background-image: url("../images/intro-deco.png"); background-repeat: no-repeat; background-position: center bottom; -webkit-background-size: 100% 100%; background-size: 100% 100%; pointer-events: none; z-index: 0;}
.art-aboutus-intro-container { position: relative; z-index: 1; display: -webkit-flex; display: flex; -webkit-align-items: flex-start; align-items: flex-start;}

/* 左侧文字（宽度 651 / 1600 ≈ 40.7%，两端对齐） */
.art-aboutus-intro_left { position: relative; width: 40.7%; flex-shrink: 0;}
/* 文字与右侧图片之间的浅蓝竖分隔线 */
.art-aboutus-intro_left::after { content: ''; position: absolute; right: -18px; top: 120px; width: 2px; height: 360px; background-color: #BCD5E7;}
.art-aboutus-intro_title { font-size: 50px; color: #1a1a1a; font-weight: bold; line-height: 1.15; font-family: 'AlimamaShuHeiTi-Bold', 'Microsoft Yahei', sans-serif; letter-spacing: 1px;}
.art-aboutus-intro_subtitle { font-size: 30px; color: #005BAC; font-weight: bold; line-height: 1.3; margin-top: 12px; font-family: 'AlimamaShuHeiTi-Bold', 'Microsoft Yahei', sans-serif;}
.art-aboutus-intro_desc { font-size: 16px; letter-spacing: .5px; color: #555; line-height: 32px; margin-top: 13px; text-align: justify;}
.art-aboutus-intro_subtitle + .art-aboutus-intro_desc { margin-top: 37px;}

/* 底部三个数字（间距 233） */
.art-aboutus-intro_stats { display: -webkit-flex; display: flex; margin-top: 65px;}
.art-aboutus-intro_stats_item { width: 233px; flex-shrink: 0;}
.art-aboutus-intro_stats_item .num { font-size: 44px; font-weight: bold; color: #005BAC; font-family: 'AlimamaShuHeiTi-Bold', 'Arial', sans-serif; line-height: 1;}
.art-aboutus-intro_stats_item .num span { font-size: 20px; margin-left: 8px; font-weight: bold; vertical-align: 4px;}
.art-aboutus-intro_stats_item .label { font-size: 16px; color: #333; margin-top: 10px;}

/* 右侧图片（835 x 499 / 宽 52.2%），设计稿图片顶 y956（距容器顶 59），右/下各有一圈偏移 16/15 的浅蓝描边卡片 */
.art-aboutus-intro_right { width: 52.2%; margin-left: auto; margin-top: 59px; flex-shrink: 0;}
.art-aboutus-intro_img { position: relative; width: 100%; padding-bottom: 59.76%; border-radius: 3px; background-color: #eef2f7;}
/* 只露出右、下两条浅蓝描边（同尺寸白卡向右下偏移） */
.art-aboutus-intro_img::after { content: ''; position: absolute; left: 16px; top: 15px; right: -16px; bottom: -15px; border: 1px solid #BCD5E7; border-radius: 6px; background-color: #fff; z-index: 1;}
.art-aboutus-intro_img img { position: absolute; width: 100%; height: 100%; top: 0; left: 0; -webkit-object-fit: cover; object-fit: cover; border-radius: 3px; z-index: 2;}

/* =========================================================
   二、企业文化模块（800 高，蓝调雪山背景 + 列分隔线 + 图标 + 短竖线）
   设计稿纵向（相对模块顶）: 标题 111 / 图标 297-364 / 短竖线 427-514 / 名称 552-580 / 描述 610
   ========================================================= */
.art-aboutus-culture { position: relative; height: 800px; background-color: #0b2d55; background-image: url("../images/culture-bg5.jpg"); background-repeat: no-repeat; background-position: center top; -webkit-background-size: 100% 100%; background-size: 100% 100%; overflow: hidden;}
/* 五列横向铺满整屏(1920/5=384)，故容器不受 1600 限制 */
.art-aboutus-culture-container { position: relative; z-index: 2; height: 100%; width: 100%; max-width: 100%; padding-top: 112px;}
.art-aboutus-culture_title { text-align: center; text-indent: 18px; font-size: 50px; color: #fff; font-weight: bold; font-family: 'AlimamaShuHeiTi-Bold', 'Microsoft Yahei', sans-serif; letter-spacing: 0; line-height: 1;}

/* 五列（每列 384，横向铺满 1920） */
.art-aboutus-culture_list { display: -webkit-flex; display: flex; margin-top: 124px;}
.art-aboutus-culture_item { -webkit-flex: 1; flex: 1; text-align: center; position: relative;}
/* 列分隔线（除第一列） */
.art-aboutus-culture_item + .art-aboutus-culture_item::before { content: ""; position: absolute; top: -282px; left: 0; width: 1px; height: 800px; background-color: rgba(255,255,255,.15);}
/* 图标：260x90 透明 PNG，与设计稿同坐标 */
.art-aboutus-culture_icon { width: 260px; height: 90px; margin: 0 auto;}
.art-aboutus-culture_icon img { display: block; width: 100%; height: 100%; margin-top: -2px;}
/* 图标下方短竖线 1x60 */
.art-aboutus-culture_line { width: 1px; height: 60px; margin: 58px auto 0; background-color: rgba(255,255,255,.85);}
/* 名称 + 描述 */
.art-aboutus-culture_name { font-size: 30px; font-weight: bold; color: #fff; letter-spacing: 2px; line-height: 1; margin-top: 58px;}
.art-aboutus-culture_desc { width: 250px; margin: 21px auto 0; font-size: 16px; color: #fff; line-height: 32px;}

/* =========================================================
   三、荣誉资质模块（浅灰底 + 4 列白卡 + 卡片下说明 + 分页）
   设计稿: 2448-3247  标题 2558 / 卡片 2660-2991 / 说明 3022 / 分页 3118
   ========================================================= */
.art-aboutus-honor { position: relative; padding: 108px 0 90px; background-color: #F1F4F9; overflow: hidden;}
.art-aboutus-honor_title { text-align: center; font-size: 50px; color: #1a1a1a; font-weight: bold; font-family: 'AlimamaShuHeiTi-Bold', 'Microsoft Yahei', sans-serif; letter-spacing: 1px; line-height: 1; margin-bottom: 53px;}

.art-aboutus-honor-swiper { position: relative;}
.art-aboutus-honor-swiper .swiper-container { overflow: hidden;}
.art-aboutus-honor_swiper_wrapper { -webkit-align-items: flex-start; align-items: flex-start;}

/* 单个证书卡片（363 x 330） */
.art-aboutus-honor_item { height: 332px; background-color: #fff; border: 1px solid transparent; border-radius: 8px; box-shadow: 0 2px 10px rgba(16,44,88,.05); display: -webkit-flex; display: flex; -webkit-align-items: center; align-items: center; -webkit-justify-content: center; justify-content: center; transition: all .3s ease; -webkit-transition: all .3s ease;}
.art-aboutus-honor_img { width: 91.2%; height: 214px; display: -webkit-flex; display: flex; -webkit-align-items: center; align-items: center; -webkit-justify-content: center; justify-content: center;}
.art-aboutus-honor_img img { max-width: 100%; max-height: 100%; -webkit-object-fit: contain; object-fit: contain;}
/* 卡片下方的证书名称 */
.art-aboutus-honor_name { font-size: 16px; color: #333; text-align: center; line-height: 1.5; margin-top: 26px; padding: 0 4px;}
/* 设计稿：卡片无描边，仅第一张卡片的名称是蓝色 */
.swiper-slide-active .art-aboutus-honor_name { color: #005BAC;}

/* 分页：左右箭头 + 圆点（设计稿 prev 811-850 / 圆点间距 28 / next 1046-1085，整组中心比页面中心左 12） */
.art-aboutus-honor_pager { display: -webkit-flex; display: flex; -webkit-align-items: center; align-items: center; -webkit-justify-content: center; justify-content: center; gap: 39px; margin-top: 76px; padding-right: 24px;}
.art-aboutus-honor_prev, .art-aboutus-honor_next { width: 40px; height: 40px; border-radius: 50%; display: -webkit-flex; display: flex; -webkit-align-items: center; align-items: center; -webkit-justify-content: center; justify-content: center; cursor: pointer; flex-shrink: 0;}
.art-aboutus-honor_prev { border: 1px solid #D3DAE4; background-color: #fff;}
.art-aboutus-honor_prev svg, .art-aboutus-honor_next svg { width: 14px; height: 14px;}
.art-aboutus-honor_prev svg path { fill: #9AA7B4;}
.art-aboutus-honor_prev:hover { border-color: #005BAC;}
.art-aboutus-honor_prev:hover svg path { fill: #005BAC;}
.art-aboutus-honor_next { background-color: #005BAC;}
.art-aboutus-honor_next svg path { fill: #fff;}
.art-aboutus-honor_next:hover { background-color: #004A8F;}
/* 圆点（设计稿 8px，间距 20，灰色 #DDDDDD，激活 #005BAC） */
.art-aboutus-honor_dots { display: -webkit-flex; display: flex; -webkit-align-items: center; align-items: center; gap: 20px;}
.art-aboutus-honor_dot { width: 8px; height: 8px; border-radius: 50%; background-color: #DDDDDD; cursor: pointer;}
.art-aboutus-honor_dot.active { background-color: #005BAC;}

/* =========================================================
   响应式（PC 优先，max-width 从大到小）
   ========================================================= */

/* 1680 */
@media (max-width:1680px) {
  .art-aboutus-intro { padding: 78px 0 96px;}
  .art-aboutus-intro_title { font-size: 40px;}
  .art-aboutus-intro_subtitle { font-size: 23px;}
  .art-aboutus-intro_stats { margin-top: 76px;}
  .art-aboutus-intro_stats_item .num { font-size: 40px;}
  .art-aboutus-intro_stats_item { width: 220px;}
  .art-aboutus-culture { height: 700px;}
  .art-aboutus-culture-container { padding-top: 95px;}
  .art-aboutus-culture_title { font-size: 44px;}
  .art-aboutus-culture_list { margin-top: 109px;}
  .art-aboutus-culture_item + .art-aboutus-culture_item::before { top: -248px; height: 700px;}
  .art-aboutus-culture_icon { width: 227px; height: 79px;}
  .art-aboutus-culture_line { height: 52px; margin-top: 51px;}
  .art-aboutus-culture_name { font-size: 26px; margin-top: 52px;}
  .art-aboutus-culture_desc { font-size: 14px; margin-top: 18px; line-height: 28px; width: 219px;}
  .art-aboutus-honor { padding: 78px 0 76px;}
  .art-aboutus-honor_title { font-size: 36px; margin-bottom: 64px;}
  .art-aboutus-honor_item { height: 290px; padding: 30px 34px;}
}

/* 1440 */
@media (max-width:1440px) {
  .art-aboutus-intro { padding: 64px 0 76px;}
  .art-aboutus-intro_title { font-size: 36px;}
  .art-aboutus-intro_subtitle { font-size: 21px; margin-top: 14px;}
  .art-aboutus-intro_left::after { top: 180px; height: 250px;}
  .art-aboutus-intro_desc { margin-top: 16px; line-height: 1.7;}
  .art-aboutus-intro_stats { margin-top: 58px;}
  .art-aboutus-intro_stats_item { width: 190px;}
  .art-aboutus-intro_stats_item .num { font-size: 36px;}
  .art-aboutus-intro_stats_item .label { font-size: 14px;}
  .art-aboutus-culture { height: 600px;}
  .art-aboutus-culture-container { padding-top: 82px;}
  .art-aboutus-culture_title { font-size: 38px;}
  .art-aboutus-culture_list { margin-top: 94px;}
  .art-aboutus-culture_item + .art-aboutus-culture_item::before { top: -214px; height: 600px;}
  .art-aboutus-culture_icon { width: 195px; height: 68px;}
  .art-aboutus-culture_line { height: 45px; margin-top: 43px;}
  .art-aboutus-culture_name { font-size: 23px; margin-top: 44px;}
  .art-aboutus-culture_desc { font-size: 12px; margin-top: 16px; line-height: 24px; width: 188px;}
  .art-aboutus-honor { padding: 66px 0 64px;}
  .art-aboutus-honor_title { font-size: 32px; margin-bottom: 52px;}
  .art-aboutus-honor_item { height: 250px; padding: 26px 28px;}
  .art-aboutus-honor_name { font-size: 13px; margin-top: 18px;}
}

/* 1280 */
@media (max-width:1280px) {
  .art-aboutus-intro { padding: 52px 0 60px;}
  .art-aboutus-intro_title { font-size: 32px;}
  .art-aboutus-intro_subtitle { font-size: 19px;}
  .art-aboutus-intro_desc { font-size: 13px;}
  .art-aboutus-intro_stats { margin-top: 44px;}
  .art-aboutus-intro_stats_item { width: 160px;}
  .art-aboutus-intro_stats_item .num { font-size: 32px;}
  .art-aboutus-intro_stats_item .num span { font-size: 16px;}
  .art-aboutus-intro_stats_item .label { font-size: 13px; margin-top: 12px;}
  .art-aboutus-culture { height: 533px;}
  .art-aboutus-culture-container { padding-top: 73px;}
  .art-aboutus-culture_title { font-size: 33px;}
  .art-aboutus-culture_list { margin-top: 83px;}
  .art-aboutus-culture_item + .art-aboutus-culture_item::before { top: -189px; height: 533px;}
  .art-aboutus-culture_icon { width: 173px; height: 60px;}
  .art-aboutus-culture_line { height: 40px; margin-top: 39px;}
  .art-aboutus-culture_name { font-size: 20px; letter-spacing: 1px; margin-top: 39px;}
  .art-aboutus-culture_desc { font-size: 12px; line-height: 22px; margin-top: 14px; width: 167px;}
  .art-aboutus-honor { padding: 54px 0 54px;}
  .art-aboutus-honor_title { font-size: 28px; margin-bottom: 42px;}
  .art-aboutus-honor_item { height: 216px; padding: 22px 22px;}
  .art-aboutus-honor_name { font-size: 12px; margin-top: 14px;}
}

/* 1080 (平板横屏)：介绍区改单列 */
@media (max-width:1080px) {
  .art-aboutus-intro-container { -webkit-flex-direction: column; flex-direction: column;}
  .art-aboutus-intro_left { width: 100%;}
  .art-aboutus-intro_left::after { display: none;}
  .art-aboutus-intro_right { width: 100%; margin-left: 0; margin-top: 0; padding-top: 36px;}
  .art-aboutus-intro_stats { margin-top: 40px;}
  .art-aboutus-culture { height: auto; padding: 54px 0; background-image: none; background-color: #0d3462;}
  .art-aboutus-culture-container { padding-top: 0; height: auto; width: 100%; max-width: 100%;}
  .art-aboutus-culture_list { -webkit-flex-wrap: wrap; flex-wrap: wrap; margin-top: 44px;}
  .art-aboutus-culture_item { -webkit-flex: none; flex: none; width: 33.33%; margin-bottom: 40px;}
  .art-aboutus-culture_item + .art-aboutus-culture_item::before { display: none;}
  .art-aboutus-culture_icon { width: 220px; height: 76px;}
  .art-aboutus-culture_line { height: 40px; margin-top: 30px;}
  .art-aboutus-culture_name { font-size: 22px; margin-top: 30px;}
  .art-aboutus-culture_desc { font-size: 13px; line-height: 26px; margin-top: 14px; width: 220px;}
}

/* 920 (平板) */
@media (max-width:920px) {
  .art-aboutus-intro { padding: 44px 0 48px;}
  .art-aboutus-intro_title { font-size: 28px;}
  .art-aboutus-intro_subtitle { font-size: 18px;}
  .art-aboutus-culture_title { font-size: 26px;}
  .art-aboutus-culture_item { width: 50%;}
  .art-aboutus-honor_title { font-size: 26px;}
}

/* 767 (手机) */
@media (max-width:767px) {
  .art-aboutus-intro { padding: 34px 0 40px;}
  .art-aboutus-intro_title { font-size: 24px;}
  .art-aboutus-intro_subtitle { font-size: 16px; margin-top: 10px;}
  .art-aboutus-intro_desc { font-size: 13px; line-height: 1.75; margin-top: 14px;}
  .art-aboutus-intro_stats { -webkit-flex-wrap: wrap; flex-wrap: wrap; margin-top: 28px; gap: 24px 0;}
  .art-aboutus-intro_stats_item { width: 50%;}
  .art-aboutus-intro_stats_item .num { font-size: 28px;}
  .art-aboutus-intro_stats_item .num span { font-size: 14px; vertical-align: 2px;}
  .art-aboutus-intro_stats_item .label { font-size: 13px; margin-top: 8px;}
  .art-aboutus-culture { padding: 40px 0;}
  .art-aboutus-culture_title { font-size: 22px; letter-spacing: 2px;}
  .art-aboutus-culture_list { margin-top: 30px;}
  .art-aboutus-culture_item { width: 100%; margin-bottom: 34px;}
  .art-aboutus-culture_name { font-size: 18px;}
  .art-aboutus-culture_desc { font-size: 12px; margin-top: 10px;}
  .art-aboutus-honor { padding: 40px 0;}
  .art-aboutus-honor_title { font-size: 22px; margin-bottom: 30px;}
  .art-aboutus-honor_item { height: 220px; padding: 24px;}
  .art-aboutus-honor_name { font-size: 12px; margin-top: 12px;}
  .art-aboutus-honor_pager { margin-top: 30px;}
}

/* ===== logo 高清版 + 双 logo 切换 ===== */
.art-header-logo img { width: auto; height: 50px;}
.art-header-logo_white { display: none;}
.art-header-logo_dark { display: block;}
.art-header-trans .art-header-logo_dark { display: none;}
.art-header-trans .art-header-logo_white { display: block;}
.art-header-trans.fxd .art-header-logo_dark { display: block;}
.art-header-trans.fxd .art-header-logo_white { display: none;}
.art-footer_logo img { display: block; width: auto; height: 50px;}