:root{
  --primary:#006982; --primary-dark:#00536a; --primary-light:#e6f2f5;
  --text:#333; --muted:#777; --bg:#f5f7f8; --white:#fff;
  --shadow:0 2px 12px rgba(0,0,0,.08); --radius:8px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.75;font-size:15px}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}
.container{max-width:1160px;margin:0 auto;padding:0 16px}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:1000;background:var(--white);box-shadow:0 1px 6px rgba(0,0,0,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.logo img{height:42px;width:auto}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2.5px;background:var(--primary);margin:5px 0;border-radius:2px;transition:.3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
.nav-list{display:flex;list-style:none;flex-wrap:nowrap}
.nav-list>li{position:relative}
.nav-list>li>a{display:block;padding:0 15px;line-height:64px;color:#333;font-size:15px;font-weight:600;white-space:nowrap}
.nav-list>li>a:hover,.nav-list>li>a.active{color:var(--primary)}
.nav-list>li>a.active{box-shadow:inset 0 -3px 0 var(--primary)}
.sub-list{position:absolute;left:0;top:100%;min-width:190px;background:var(--white);box-shadow:var(--shadow);list-style:none;opacity:0;visibility:hidden;transform:translateY(8px);transition:.25s;border-top:3px solid var(--primary)}
.nav-list>li:hover .sub-list{opacity:1;visibility:visible;transform:translateY(0)}
.sub-list a{display:block;padding:10px 16px;color:#444;font-size:14px;border-bottom:1px solid #f0f0f0}
.sub-list a:hover,.sub-list a.active{background:var(--primary-light);color:var(--primary)}

/* ===== Banner ===== */
.page-banner{position:relative;background:linear-gradient(120deg,#006982 0%,#0a4a5f 100%);color:#fff;text-align:center;padding:52px 16px;overflow:hidden}
.page-banner::before{content:"";position:absolute;inset:0;background:url("../images/img09.jpg") center/cover no-repeat;opacity:.1;filter:grayscale(30%)}
.page-banner>*{position:relative;z-index:1}
.page-banner h1{font-size:28px;font-weight:700;letter-spacing:2px}
.page-banner .crumb{margin-top:8px;font-size:13px;opacity:.85}
.page-banner .crumb a{color:#fff}
.home-banner{position:relative;height:35vw;max-height:680px;min-height:400px;display:flex;align-items:center;overflow:hidden;background:url("../images/sy1.jpg") center 55%/cover no-repeat}
.home-banner::before{content:"";position:absolute;inset:0;z-index:0;background:linear-gradient(90deg,rgba(4,36,52,.9) 0%,rgba(5,42,58,.62) 50%,rgba(6,46,64,.32) 100%);display:none}
.home-banner .container{position:relative;z-index:2;color:#fff;padding-top:40px;padding-bottom:40px;}
.home-banner h2{font-size:46px;line-height:1.5;letter-spacing:5px;text-shadow:0 3px 12px rgba(0,0,0,.45)}
.home-banner p{font-size:19px;margin-top:18px;opacity:.95;letter-spacing:2px}
.banner-btn{display:inline-block;margin-top:34px;background:var(--primary);color:#fff;padding:14px 44px;border-radius:4px;font-size:17px;letter-spacing:3px;transition:.3s;box-shadow:0 4px 14px rgba(0,0,0,.25)}
.banner-btn:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px)}
/* 滚动提示箭头 */
.banner-scroll{position:absolute;left:50%;bottom:46px;transform:translateX(-50%);z-index:2;color:#fff;font-size:13px;letter-spacing:2px;opacity:.85;text-align:center;cursor:pointer;animation:bounce 2s infinite}
.banner-scroll::after{content:"\276F";display:block;margin:6px auto 0;transform:rotate(90deg);font-size:18px}
/* 首页 banner 轮播：图与文字由 index.asp 从数据库 pic 表动态输出，每张 slide 自带文字层，随图淡入淡出 */
.banner-slides{position:absolute;inset:0}
.banner-slides .slide{position:absolute;inset:0;display:flex;align-items:center;background:center 55%/cover no-repeat;opacity:0;transform:scale(1.06);transition:opacity 1s ease,transform 6.5s ease}
/* 每张图自带的深色渐变遮罩：z-index:1，位于图片之上、文字(container z-index:2)之下 */
.banner-slides .slide::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(90deg,rgba(4,36,52,.9) 0%,rgba(5,42,58,.62) 50%,rgba(6,46,64,.32) 100%)}
.banner-slides .slide.on{opacity:1;transform:scale(1)}
.banner-dots{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);display:flex;gap:10px;z-index:2}
.banner-dots button{width:30px;height:4px;padding:0;border:0;border-radius:2px;background:rgba(255,255,255,.4);cursor:pointer;transition:background .3s}
.banner-dots button.on{background:#fff}
@keyframes bounce{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,10px)}}

/* ===== Sections ===== */
.section{padding-top:52px;padding-bottom:52px}
.section.alt{background:var(--white)}
.sec-title{text-align:center;margin-bottom:36px}
.sec-title h2{font-size:26px;color:var(--primary);letter-spacing:2px}
.sec-title h2::after{content:"";display:block;width:52px;height:3px;background:var(--primary);margin:12px auto 0;border-radius:2px}
.sec-title p{color:var(--muted);margin-top:10px;font-size:14px}

.rich p{margin-bottom:14px;text-align:justify}
.rich h3{color:var(--primary);margin:26px 0 12px;font-size:19px;border-left:4px solid var(--primary);padding-left:12px}
.rich b,.rich strong{color:var(--primary-dark)}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

.card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:.3s}
.card:hover{transform:translateY(-4px);box-shadow:0 8px 20px rgba(0,0,0,.14)}
.card .thumb{overflow:hidden}
.card .thumb img{width:100%;height:210px;object-fit:cover;transition:.4s}
.card:hover .thumb img{transform:scale(1.06)}
.card .body{padding:16px}
.card .body h3{font-size:16px;color:#333}
.card .body p{font-size:13px;color:var(--muted);margin-top:6px}

/* stats */
.stats{background:linear-gradient(120deg,#006982 0%,#0a4a5f 100%);color:#fff;padding:44px 0}
.stats .grid4{text-align:center}
.stats .num{font-size:40px;font-weight:800;line-height:1.2}
.stats .num span{font-size:18px;font-weight:600;margin-left:3px}
.stats .label{margin-top:6px;font-size:14px;opacity:.9}

/* gallery：固定尺寸卡片，完整显示不裁切 */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.gallery.g2{grid-template-columns:repeat(2,1fr)}
.gallery .g-item,.fig-card{margin:0;background:#fff;border:1px solid #e3ecef;border-radius:var(--radius);overflow:hidden;cursor:zoom-in;box-shadow:var(--shadow);transition:.3s}
.gallery .g-item:hover,.fig-card:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(0,0,0,.14)}
.gallery .ph,.fig-card .ph{height:250px;display:flex;align-items:center;justify-content:center;padding:10px;background:#fff}
.gallery .ph img,.fig-card .ph img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}
.gallery figcaption,.fig-card figcaption{text-align:center;font-size:13px;color:#555;padding:9px 8px;border-top:1px solid #f0f4f6;min-height:38px}
/* 图文混排中的独立配图卡片 */
.rich .fig-card{max-width:520px;margin:18px auto}
/* 只作展示、不参与放大预览的图 */
.g-item.no-zoom{cursor:default}

/* lightbox 灯箱 */
.lightbox{position:fixed;inset:0;background:rgba(8,28,38,.93);display:none;align-items:center;justify-content:center;z-index:2000}
.lightbox.open{display:flex}
.lb-stage{max-width:88vw;max-height:80vh;display:flex;align-items:center;justify-content:center}
.lb-stage img{max-width:88vw;max-height:80vh;width:auto;height:auto;box-shadow:0 10px 40px rgba(0,0,0,.55);background:#fff;padding:6px;border-radius:4px}
.lb-close{position:absolute;top:16px;right:22px;width:46px;height:46px;border:0;border-radius:50%;background:rgba(255,255,255,.14);color:#fff;font-size:26px;cursor:pointer;line-height:1}
.lb-close:hover{background:rgba(255,255,255,.3)}
.lb-prev,.lb-next{position:absolute;top:50%;transform:translateY(-50%);width:52px;height:52px;border:0;border-radius:50%;background:rgba(255,255,255,.14);color:#fff;font-size:24px;cursor:pointer}
.lb-prev{left:18px}
.lb-next{right:18px}
.lb-prev:hover,.lb-next:hover{background:rgba(255,255,255,.3)}
.lb-counter{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);color:#fff;font-size:14px;letter-spacing:1px;background:rgba(0,0,0,.35);padding:4px 16px;border-radius:14px}
.lb-caption{position:absolute;bottom:58px;left:50%;transform:translateX(-50%);color:#ddd;font-size:14px;max-width:80vw;text-align:center}

/* table */
.table-wrap{overflow-x:auto;background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow)}
table.perf{width:100%;border-collapse:collapse;min-width:720px;font-size:14px}
table.perf th,table.perf td{border:1px solid #d8e4e8;padding:9px 12px;text-align:center}
table.perf th{background:var(--primary);color:#fff;white-space:nowrap;position:sticky;top:0}
table.perf tr:nth-child(even){background:#f2f8fa}
table.perf td.l{text-align:left}
.table-note{font-size:13px;color:var(--muted);margin:12px 2px}

/* news */
.news-item{display:flex;gap:20px;background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin-bottom:22px}
.news-item .thumb{flex:0 0 280px}
.news-item .thumb img{width:100%;height:190px;object-fit:cover}
.news-item .body{padding:18px 22px}
.news-item .body h3{font-size:18px;color:var(--primary)}
.news-item .body .date{font-size:13px;color:var(--muted);margin:6px 0 10px}
.news-item .body p{font-size:14px;color:#555;text-align:justify}

/* contact */
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:34px}
.contact-card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px 20px;text-align:center}
.contact-card .ico{width:54px;height:54px;border-radius:50%;background:var(--primary-light);color:var(--primary);font-size:24px;margin:0 auto 12px;display:flex;align-items:center;justify-content:center}
.contact-card .ico svg{width:26px;height:26px;display:block}
.contact-card h3{font-size:16px;margin-bottom:6px}
.contact-card p{font-size:14px;color:#555;word-break:break-all}

/* recruit */
.job{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px 26px;margin-bottom:22px}
.job h3{color:var(--primary);font-size:18px}
.job .dept{font-size:13px;color:var(--muted);margin-bottom:10px}
.job ul{padding-left:20px}
.job li{margin-bottom:4px;font-size:14px}

/* process */
.flow-img{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;margin-top:20px}

/* footer */
.site-footer{background:#123842;color:#cfe3e9;padding:40px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;padding-bottom:28px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:12px}
.site-footer a{color:#cfe3e9}
.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);text-align:center;padding:14px 0;font-size:13px;color:#9db9c2}

/* back to top */
#backtop{position:fixed;right:18px;bottom:24px;width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;border:0;font-size:20px;cursor:pointer;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.3s;z-index:999}
#backtop.show{opacity:1;visibility:visible}
#backtop:hover{background:var(--primary-dark)}

/* mobile phone bar */
.phone-bar{display:none}

/* ===== Responsive ===== */
@media (max-width:1060px){
  .nav-toggle{display:block}
  .site-nav{position:fixed;top:64px;left:0;right:0;bottom:0;background:var(--white);overflow-y:auto;transform:translateX(100%);transition:.3s;z-index:998}
  .site-nav.open{transform:translateX(0)}
  .nav-list{flex-direction:column;padding:10px 0}
  .nav-list>li>a{line-height:1.4;padding:14px 20px;border-bottom:1px solid #f0f0f0;font-size:16px}
  .nav-list>li>a.active{box-shadow:none;background:var(--primary-light)}
  .sub-list{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border-top:0;display:none;background:#f7fafb}
  .nav-list>li.sub-open .sub-list{display:block}
  .sub-list a{padding:12px 34px;border-bottom:1px solid #eef3f5}
  .has-sub>a::after{content:"\25BE";float:right;color:var(--primary);transition:.3s}
  .has-sub.sub-open>a::after{transform:rotate(180deg)}
}
@media (max-width:768px){
  .home-banner{height:64vw;max-height:520px;min-height:360px}
  .home-banner h2{font-size:26px;letter-spacing:2px}
  .home-banner p{font-size:15px}
  .banner-btn{margin-top:26px;padding:12px 36px;font-size:15px}
  .banner-scroll{display:none}
  .banner-dots{bottom:10px}
  .grid2,.grid3,.grid4,.contact-cards{grid-template-columns:1fr}
  .grid4{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .gallery.g2{grid-template-columns:1fr}
  .gallery .ph{height:180px}
  .news-item{flex-direction:column}
  .news-item .thumb{flex:none}
  .footer-grid{grid-template-columns:1fr}
  .section{padding-top:36px;padding-bottom:36px}
  .stats .num{font-size:30px}
  .page-banner{padding:38px 14px}
  .page-banner h1{font-size:22px}
  .rich h3{font-size:17px}
  .stats .grid4{grid-template-columns:repeat(2,1fr);gap:26px 10px}
}