/* ================= 福明光电 企业官网 ================= */
:root{
  --navy:#071a3a; --navy2:#0b2c5e; --blue:#1257c4; --blue-l:#2f7ae5;
  --accent:#ff8a1e; --accent-d:#e8730a;
  --txt:#1d2733; --txt2:#5a6a7d; --txt3:#8b98a8;
  --line:#e6ebf2; --bg:#f5f7fa; --white:#fff;
  --radius:10px; --shadow:0 4px 20px rgba(12,40,90,.08); --shadow-h:0 12px 34px rgba(12,40,90,.16);
  --wrap:1240px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--txt);background:var(--white);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:.25s}
img{max-width:100%;display:block;border:0}
ul,ol{list-style:none}
h1,h2,h3,h4,h5{font-weight:700;line-height:1.35}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.clearfix::after{content:"";display:block;clear:both}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:900;background:var(--white);box-shadow:0 2px 14px rgba(10,30,70,.07)}
.topbar{background:var(--navy);color:#a9bcd8;font-size:13px;line-height:36px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center}
.topbar a{color:#a9bcd8;margin-left:18px}
.topbar a:hover{color:#fff}
.tb-tel{color:var(--accent);margin-left:20px;font-weight:600}
.header-main .wrap{display:flex;align-items:center;gap:22px;height:78px}
.logo{display:flex;align-items:center;gap:11px;flex-shrink:0}
.logo-mark{width:44px;height:44px;border-radius:9px;background:linear-gradient(135deg,var(--blue),var(--navy2));color:#fff;font-weight:800;font-size:18px;letter-spacing:.5px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(18,87,196,.32)}
.logo-txt b{display:block;font-size:21px;letter-spacing:1px;color:var(--navy)}
.logo-txt i{display:block;font-style:normal;font-size:10px;color:var(--txt3);letter-spacing:1.1px}
.logo-img{display:block;max-height:52px;max-width:220px;width:auto;height:auto}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav>a,.nav-item>a{display:block;padding:0 17px;height:78px;line-height:78px;font-size:15.5px;font-weight:500;color:var(--txt);position:relative}
.nav>a:hover,.nav-item:hover>a,.nav>a.on,.nav-item.on>a{color:var(--blue)}
.nav>a::after,.nav-item>a::after{content:"";position:absolute;left:17px;right:17px;bottom:16px;height:2.5px;background:var(--blue);border-radius:2px;transform:scaleX(0);transition:.25s}
.nav>a:hover::after,.nav-item:hover>a::after,.nav>a.on::after,.nav-item.on>a::after{transform:scaleX(1)}
.nav-item{position:relative}
.dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);min-width:190px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-h);padding:8px;opacity:0;visibility:hidden;transition:.25s;border:1px solid var(--line)}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown a{display:block;padding:9px 14px;font-size:14px;border-radius:7px;color:var(--txt2);white-space:nowrap}
.dropdown a:hover{background:var(--bg);color:var(--blue)}
.hd-search{display:flex;align-items:center;background:var(--bg);border-radius:20px;padding:0 4px 0 14px;height:38px;border:1px solid transparent;transition:.25s}
.hd-search:focus-within{border-color:var(--blue);background:#fff}
.hd-search input{border:0;background:none;outline:0;width:130px;font-size:13.5px;color:var(--txt)}
.hd-search button{width:30px;height:30px;border:0;border-radius:50%;background:var(--blue);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center}
.menu-btn{display:none;width:40px;height:40px;border:0;background:none;flex-direction:column;justify-content:center;gap:5px;cursor:pointer}
.menu-btn span{display:block;height:2px;background:var(--navy);border-radius:2px;transition:.3s}

/* ---------- Hero ---------- */
.hero{position:relative;height:520px;overflow:hidden;background:var(--navy)}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .9s;display:flex;align-items:center}
.hero-slide.on{opacity:1}
.hero-slide::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(4,16,40,.92) 0%,rgba(7,26,58,.72) 45%,rgba(7,26,58,.35) 100%)}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center}
.hero-inner{position:relative;max-width:var(--wrap);margin:0 auto;padding:0 20px;width:100%;color:#fff}
.hero-tag{display:inline-block;padding:5px 14px;border:1px solid rgba(255,255,255,.35);border-radius:20px;font-size:13px;letter-spacing:1px;margin-bottom:20px;backdrop-filter:blur(4px)}
.hero h2{font-size:46px;line-height:1.25;letter-spacing:1px;margin-bottom:16px;text-shadow:0 3px 20px rgba(0,0,0,.3)}
.hero h2 em{font-style:normal;color:var(--accent)}
.hero p{font-size:17px;color:#c8d6ea;max-width:560px;margin-bottom:30px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 30px;border-radius:24px;font-size:15px;font-weight:600;cursor:pointer;border:0;transition:.28s}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 8px 22px rgba(255,138,30,.35)}
.btn-accent:hover{background:var(--accent-d);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.45)}
.btn-ghost:hover{background:#fff;color:var(--navy)}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--navy2);transform:translateY(-2px)}
.hero-dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:9px;z-index:5}
.hero-dots i{width:28px;height:4px;border-radius:3px;background:rgba(255,255,255,.4);cursor:pointer;transition:.3s}
.hero-dots i.on{background:var(--accent);width:44px}

/* ---------- Feature strip ---------- */
.feature-strip{background:var(--white);border-bottom:1px solid var(--line)}
.feature-strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.fs-item{padding:28px 24px;text-align:center;border-right:1px solid var(--line)}
.fs-item:last-child{border-right:0}
.fs-item b{display:block;font-size:30px;color:var(--blue);letter-spacing:-.5px}
.fs-item b i{font-style:normal;font-size:16px;color:var(--accent)}
.fs-item span{font-size:14px;color:var(--txt2)}

/* ---------- Section ---------- */
.section{padding:72px 0}
.section-gray{background:var(--bg)}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head span{display:block;font-size:12px;letter-spacing:3px;color:var(--accent);font-weight:700;text-transform:uppercase;margin-bottom:9px}
.sec-head h3{font-size:32px;color:var(--navy);letter-spacing:1px}
.sec-head p{color:var(--txt2);margin-top:11px;font-size:15px}
.sec-head::after{content:"";display:block;width:46px;height:3px;background:var(--accent);border-radius:2px;margin:16px auto 0}

/* ---------- 分类卡片 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cat-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.3s;border:1px solid var(--line);display:flex;flex-direction:column}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-h);border-color:#cfe0f7}
.cat-thumb{height:186px;background:#eef2f8;overflow:hidden;display:flex;align-items:center;justify-content:center;position:relative}
.cat-thumb img{width:100%;height:100%;object-fit:cover;transition:.5s}
.cat-card:hover .cat-thumb img{transform:scale(1.07)}
.cat-num{position:absolute;right:12px;top:12px;background:rgba(7,26,58,.78);color:#fff;font-size:12px;padding:3px 10px;border-radius:12px}
.cat-body{padding:18px 20px 20px;flex:1;display:flex;flex-direction:column}
.cat-body h4{font-size:17.5px;color:var(--navy);margin-bottom:7px}
.cat-body p{font-size:13.5px;color:var(--txt2);flex:1;min-height:40px}
.cat-more{margin-top:12px;font-size:13.5px;color:var(--blue);font-weight:600;display:inline-flex;align-items:center;gap:5px}
.cat-card:hover .cat-more{gap:10px;color:var(--accent)}

/* ---------- 产品卡片 ---------- */
.pro-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.pro-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s;display:flex;flex-direction:column}
.pro-card:hover{box-shadow:var(--shadow-h);transform:translateY(-5px);border-color:#cfe0f7}
.pro-thumb{aspect-ratio:1/1;background:#f7f9fc;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:10px}
.pro-thumb img{width:100%;height:100%;object-fit:contain;transition:.45s;mix-blend-mode:multiply}
.pro-card:hover .pro-thumb img{transform:scale(1.08)}
.pro-body{padding:14px 16px 18px;border-top:1px solid var(--line);flex:1;display:flex;flex-direction:column}
.pro-body h4{font-size:15px;color:var(--txt);line-height:1.5;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:45px}
.pro-card:hover .pro-body h4{color:var(--blue)}
.pro-meta{font-size:12.5px;color:var(--txt3);display:flex;gap:10px;flex-wrap:wrap;margin-top:auto}
.pro-meta i{font-style:normal;background:var(--bg);padding:2px 8px;border-radius:4px}
.pro-cat{font-size:12px;color:var(--accent);font-weight:600;margin-bottom:5px}

.more-wrap{text-align:center;margin-top:42px}

/* ---------- 优势 ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.adv-item{background:#fff;padding:32px 26px;border-radius:var(--radius);text-align:center;border:1px solid var(--line);transition:.3s}
.adv-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-h)}
.adv-ico{width:60px;height:60px;margin:0 auto 18px;border-radius:16px;background:linear-gradient(135deg,#eaf2ff,#d7e6ff);color:var(--blue);display:flex;align-items:center;justify-content:center}
.adv-item:hover .adv-ico{background:linear-gradient(135deg,var(--blue),var(--navy2));color:#fff}
.adv-item h4{font-size:17px;color:var(--navy);margin-bottom:9px}
.adv-item p{font-size:13.5px;color:var(--txt2)}

/* ---------- 关于 ---------- */
.about-flex{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.about-txt span{font-size:12px;letter-spacing:3px;color:var(--accent);font-weight:700}
.about-txt h3{font-size:31px;color:var(--navy);margin:10px 0 18px}
.about-txt p{color:var(--txt2);margin-bottom:14px;font-size:15px}
.about-points{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:24px 0 28px}
.about-points li{display:flex;align-items:center;gap:9px;font-size:14.5px;color:var(--txt)}
.about-points li::before{content:"✓";width:20px;height:20px;flex-shrink:0;border-radius:50%;background:var(--accent);color:#fff;font-size:12px;display:flex;align-items:center;justify-content:center}
.about-media{position:relative;border-radius:14px;overflow:hidden;box-shadow:var(--shadow-h);background:var(--navy);min-height:330px;display:flex;align-items:center;justify-content:center}
.about-media img{width:100%;height:100%;object-fit:cover}
.about-badge{position:absolute;left:0;bottom:0;background:var(--accent);color:#fff;padding:16px 26px;border-radius:0 14px 0 0}
.about-badge b{display:block;font-size:27px;line-height:1.1}
.about-badge span{font-size:12.5px;opacity:.92}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-card{position:relative;border-radius:var(--radius);overflow:hidden;height:230px;background:var(--navy2);display:block}
.case-card img{width:100%;height:100%;object-fit:cover;transition:.5s;opacity:.85}
.case-card:hover img{transform:scale(1.08);opacity:1}
.case-mask{position:absolute;inset:0;background:linear-gradient(to top,rgba(4,16,40,.9) 0%,rgba(4,16,40,.15) 60%,transparent 100%);display:flex;flex-direction:column;justify-content:flex-end;padding:20px 22px;color:#fff}
.case-mask b{font-size:17px;margin-bottom:4px}
.case-mask span{font-size:13px;color:#bcd0e8}

/* ---------- 新闻 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.3s;display:flex;flex-direction:column}
.news-card:hover{box-shadow:var(--shadow-h);transform:translateY(-5px)}
.news-date{font-size:12.5px;color:var(--txt3);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.news-date i{font-style:normal;background:var(--bg);color:var(--blue);padding:2px 9px;border-radius:4px;font-weight:600}
.news-card h4{font-size:16.5px;color:var(--navy);margin-bottom:10px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover h4{color:var(--blue)}
.news-card p{font-size:13.5px;color:var(--txt2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;flex:1}

/* ---------- 品牌 ---------- */
.brand-row{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.brand-item{background:#fff;border:1px solid var(--line);border-radius:8px;height:74px;display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;color:var(--txt3);letter-spacing:1px;transition:.3s}
.brand-item:hover{color:var(--blue);border-color:var(--blue);box-shadow:var(--shadow)}

/* ---------- 内页 banner ---------- */
.page-banner{height:230px;background:linear-gradient(115deg,var(--navy) 0%,var(--navy2) 55%,var(--blue) 100%);position:relative;display:flex;align-items:center;overflow:hidden}
.page-banner::after{content:"";position:absolute;right:-90px;top:-90px;width:340px;height:340px;border-radius:50%;background:rgba(255,138,30,.16)}
.page-banner::before{content:"";position:absolute;left:38%;bottom:-130px;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,.06)}
.pb-inner{position:relative;z-index:2;color:#fff}
.pb-inner h2{font-size:34px;letter-spacing:1.5px;margin-bottom:8px}
.pb-inner p{color:#b7c9e2;font-size:14.5px;letter-spacing:.5px}
.crumb{background:#fff;border-bottom:1px solid var(--line);font-size:13.5px;color:var(--txt2);line-height:50px}
.crumb a:hover{color:var(--blue)}
.crumb .sep{margin:0 8px;color:var(--txt3)}

/* ---------- 内页布局 ---------- */
.page-body{padding:44px 0 70px;background:var(--bg)}
.layout{display:grid;grid-template-columns:250px 1fr;gap:28px;align-items:start}
.sidebar{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);position:sticky;top:130px}
.side-head{background:linear-gradient(120deg,var(--navy2),var(--blue));color:#fff;padding:18px 20px}
.side-head b{font-size:18px;display:block}
.side-head span{font-size:11px;opacity:.7;letter-spacing:1.5px;text-transform:uppercase}
.side-nav li a{display:flex;justify-content:space-between;align-items:center;padding:13px 20px;font-size:14.5px;color:var(--txt2);border-bottom:1px solid var(--line)}
.side-nav li a:hover,.side-nav li a.on{background:var(--bg);color:var(--blue);font-weight:600;padding-left:24px}
.side-nav li a.on{border-left:3px solid var(--accent)}
.side-nav li a em{font-style:normal;font-size:11px;color:var(--txt3)}
.side-contact{padding:20px;background:linear-gradient(150deg,var(--navy),var(--navy2));color:#fff;margin-top:0}
.side-contact span{font-size:12.5px;color:#9db3d4}
.side-contact b{display:block;font-size:21px;color:var(--accent);margin:4px 0 12px;letter-spacing:.5px}
.side-contact .btn{height:38px;font-size:14px;width:100%}

.content-box{background:#fff;border-radius:var(--radius);border:1px solid var(--line);padding:28px}
.cb-head{display:flex;justify-content:space-between;align-items:center;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:24px}
.cb-head h3{font-size:21px;color:var(--navy)}
.cb-head .cnt{font-size:13px;color:var(--txt3)}
.pro-grid.in-page{grid-template-columns:repeat(3,1fr)}

/* ---------- 产品详情 ---------- */
.detail-top{display:grid;grid-template-columns:.95fr 1.05fr;gap:34px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin-bottom:24px}
.gallery-main{aspect-ratio:1/1;background:#f7f9fc;border-radius:8px;display:flex;align-items:center;justify-content:center;overflow:hidden;border:1px solid var(--line);position:relative}
.gallery-main img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}
.gallery-main .gm-video{width:100%;height:100%;object-fit:contain;background:#000}
.gallery-thumbs{display:grid;grid-template-columns:repeat(5,1fr);gap:9px;margin-top:12px}
.gallery-thumbs div{position:relative;aspect-ratio:1/1;border:2px solid var(--line);border-radius:6px;overflow:hidden;cursor:pointer;background:#f7f9fc;transition:.25s}
.gallery-thumbs div.on,.gallery-thumbs div:hover{border-color:var(--blue)}
.gallery-thumbs img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}
.gallery-thumbs .thumb-video .play-ic{position:absolute;inset:0;margin:auto;width:34px;height:34px;line-height:34px;text-align:center;border-radius:50%;background:rgba(0,0,0,.55);color:#fff;font-size:14px;padding-left:3px;box-sizing:border-box}
.gallery-thumbs div.thumb-video.on,.gallery-thumbs div.thumb-video:hover{border-color:var(--accent,#e8312f)}
.gallery-main{cursor:zoom-in}
.gallery-main .gm-zoom{position:absolute;right:10px;bottom:10px;background:rgba(0,0,0,.5);color:#fff;font-size:12px;padding:4px 9px;border-radius:20px;pointer-events:none}
/* ---------- 图册灯箱 ---------- */
.glightbox{position:fixed;inset:0;z-index:9999;display:none;align-items:center;justify-content:center}
.glightbox .gl-mask{position:absolute;inset:0;background:rgba(0,0,0,.78);cursor:zoom-out}
.glightbox .gl-box{position:relative;z-index:1;display:flex;gap:16px;width:min(1080px,94vw);height:min(82vh,820px);background:#fff;border-radius:12px;padding:14px;box-shadow:0 18px 60px rgba(0,0,0,.45)}
.glightbox .gl-close{position:absolute;top:-15px;right:-15px;width:38px;height:38px;border-radius:50%;border:none;background:#fff;color:#333;font-size:22px;line-height:1;cursor:pointer;box-shadow:0 2px 12px rgba(0,0,0,.35);z-index:2}
.glightbox .gl-stage{position:relative;flex:1;min-width:0;background:#f7f9fc;border-radius:8px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.glightbox .gl-stage img,.glightbox .gl-stage video{width:100%;height:100%;object-fit:contain;background:#000;cursor:crosshair}
.glightbox .gl-lens{position:absolute;width:120px;height:120px;border:1px solid #fff;background:rgba(255,255,255,.25);display:none;pointer-events:none;z-index:4}
.glightbox .gl-result{position:absolute;top:10px;right:10px;border:2px solid #fff;box-shadow:0 4px 16px rgba(0,0,0,.4);background-repeat:no-repeat;display:none;pointer-events:none;z-index:5}
.glightbox .gl-list{width:148px;flex:none;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding-right:4px}
.glightbox .gl-item{position:relative;flex:none;aspect-ratio:1/1;border:2px solid var(--line);border-radius:6px;overflow:hidden;cursor:pointer;background:#f7f9fc}
.glightbox .gl-item.on,.glightbox .gl-item:hover{border-color:var(--blue)}
.glightbox .gl-item img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}
.glightbox .gl-item .play-ic{position:absolute;inset:0;margin:auto;width:34px;height:34px;line-height:34px;text-align:center;border-radius:50%;background:rgba(0,0,0,.55);color:#fff;font-size:14px;padding-left:3px;box-sizing:border-box}
.glightbox .gl-item.on .play-ic{background:var(--accent,#e8312f)}
@media (max-width:640px){.glightbox .gl-box{flex-direction:column;height:auto;max-height:90vh}.glightbox .gl-list{width:100%;flex-direction:row;flex-wrap:nowrap;overflow-x:auto}.glightbox .gl-item{width:74px;flex:none}.glightbox .gl-result{display:none}}
.detail-info h1{font-size:26px;color:var(--navy);line-height:1.4;margin-bottom:10px}
.detail-sub{font-size:14px;color:var(--txt2);background:var(--bg);padding:10px 14px;border-radius:7px;border-left:3px solid var(--accent);margin-bottom:20px}
.param-table{width:100%;border-collapse:collapse;font-size:14px;margin-bottom:22px}
.param-table tr{border-bottom:1px dashed var(--line)}
.param-table th{text-align:left;padding:9px 0;color:var(--txt3);font-weight:500;width:96px;vertical-align:top}
.param-table td{padding:9px 0;color:var(--txt)}
.detail-acts{display:flex;gap:12px;flex-wrap:wrap}
.detail-tel{display:flex;align-items:center;gap:12px;background:linear-gradient(120deg,var(--navy),var(--navy2));color:#fff;padding:14px 20px;border-radius:9px;margin-bottom:18px}
.detail-tel b{font-size:22px;color:var(--accent);letter-spacing:.5px}
.detail-tel span{font-size:12.5px;color:#9db3d4;display:block}
.tab-head{display:flex;gap:0;border-bottom:2px solid var(--line);margin-bottom:22px}
.tab-head a{padding:12px 26px;font-size:15.5px;font-weight:600;color:var(--txt2);border-bottom:3px solid transparent;margin-bottom:-2px}
.tab-head a.on{color:var(--blue);border-color:var(--blue)}
.detail-content img{margin:8px auto;border-radius:6px}
.detail-content p{margin-bottom:12px;color:var(--txt2)}
/* 详情页下方：更多产品图片（仅 ID=1 等大图集产品显示） */
.detail-extra{margin-top:30px}
.detail-extra .extra-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:16px;margin-top:18px}
.detail-extra .extra-item{display:block;aspect-ratio:1/1;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#f7f9fc;transition:.25s}
.detail-extra .extra-item:hover{border-color:var(--blue);box-shadow:0 6px 18px rgba(0,0,0,.12)}
.detail-extra .extra-item img{width:100%;height:100%;object-fit:contain}

.article-head{text-align:center;;padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:26px}
.article-head h1{font-size:27px;color:var(--navy);margin-bottom:12px;line-height:1.45}
.article-meta{font-size:13px;color:var(--txt3);display:flex;gap:18px;justify-content:center}
.article-body{font-size:15.5px;color:#3c4a5c;line-height:1.95}
.article-body p{margin-bottom:16px}
.article-body h3{color:var(--navy);margin:26px 0 12px;font-size:19px;padding-left:12px;border-left:4px solid var(--accent)}
.article-body img{margin:16px auto;border-radius:8px}
.article-body ul{margin:0 0 16px 4px}
.article-body li{padding-left:18px;position:relative;margin-bottom:8px}
.article-body li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.prev-next{display:flex;justify-content:space-between;gap:16px;margin-top:34px;padding-top:20px;border-top:1px solid var(--line);font-size:14px}
.prev-next a{color:var(--txt2);max-width:48%}
.prev-next a:hover{color:var(--blue)}

/* ---------- 列表项（新闻/案例） ---------- */
.list-row{display:flex;gap:20px;padding:20px 0;border-bottom:1px dashed var(--line)}
.list-row:first-child{padding-top:0}
.list-thumb{width:210px;height:135px;flex-shrink:0;border-radius:8px;overflow:hidden;background:#f0f4f9}
.list-thumb img{width:100%;height:100%;object-fit:cover;transition:.4s}
.list-row:hover .list-thumb img{transform:scale(1.06)}
.list-info{flex:1;min-width:0;display:flex;flex-direction:column}
.list-info h4{font-size:17.5px;color:var(--navy);margin-bottom:9px}
.list-row:hover .list-info h4{color:var(--blue)}
.list-info p{font-size:13.8px;color:var(--txt2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.list-info .lm{font-size:12.5px;color:var(--txt3);margin-top:10px;display:flex;gap:16px}

/* ---------- 分页 ---------- */
.pager{display:flex;justify-content:center;align-items:center;gap:7px;margin-top:36px;flex-wrap:wrap;font-size:14px}
.pager a,.pager .cur{min-width:38px;height:38px;padding:0 12px;border-radius:7px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);background:#fff;color:var(--txt2)}
.pager a:hover{border-color:var(--blue);color:var(--blue)}
.pager .cur{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:600}
.pg-info{color:var(--txt3);margin-right:10px;font-size:13px}
.pg-dot{color:var(--txt3)}

/* ---------- 表单 ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-item{display:flex;flex-direction:column;gap:7px}
.form-item.full{grid-column:1/-1}
.form-item label{font-size:14px;color:var(--txt);font-weight:500}
.form-item label i{color:#e5484d;font-style:normal}
.form-item input,.form-item textarea,.form-item select{border:1px solid var(--line);border-radius:8px;padding:11px 14px;font-size:14.5px;font-family:inherit;color:var(--txt);outline:0;transition:.25s;background:#fff;width:100%}
.form-item input:focus,.form-item textarea:focus,.form-item select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(18,87,196,.1)}
.form-item textarea{min-height:130px;resize:vertical}
.form-tip{font-size:12.5px;color:var(--txt3)}
.alert{padding:13px 18px;border-radius:8px;font-size:14.5px;margin-bottom:20px}
.alert-ok{background:#eafaf0;color:#1a7f43;border:1px solid #b8e6c9}
.alert-err{background:#fdeded;color:#c92a2a;border:1px solid #f5c2c2}

/* ---------- 联系 ---------- */
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:28px}
.cc-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center;transition:.3s}
.cc-item:hover{box-shadow:var(--shadow-h);transform:translateY(-4px)}
.cc-ico{width:52px;height:52px;margin:0 auto 14px;border-radius:14px;background:linear-gradient(135deg,#eaf2ff,#d7e6ff);color:var(--blue);display:flex;align-items:center;justify-content:center}
.cc-item h4{font-size:16px;color:var(--navy);margin-bottom:7px}
.cc-item p{font-size:14px;color:var(--txt2);word-break:break-all}
.sales-table{width:100%;border-collapse:collapse;font-size:14.5px;background:#fff}
.sales-table th{background:var(--navy);color:#fff;padding:13px 16px;text-align:left;font-weight:600;font-size:14px}
.sales-table td{padding:13px 16px;border-bottom:1px solid var(--line);color:var(--txt2)}
.sales-table tr:hover td{background:var(--bg)}
.sales-table td b{color:var(--txt)}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:#93a8c8;font-size:14px}
.foot-cta{background:linear-gradient(100deg,var(--blue),var(--navy2));padding:34px 0}
.foot-cta .wrap{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.cta-txt b{display:block;font-size:23px;color:#fff;margin-bottom:5px}
.cta-txt span{font-size:14px;color:#cfe0f8}
.cta-act{display:flex;gap:13px}
.foot-main{padding:52px 0 40px}
.foot-main .wrap{display:grid;grid-template-columns:1.2fr .8fr 1.2fr 1fr;gap:34px}
.fcol h4{color:#fff;font-size:16px;margin-bottom:18px;position:relative;padding-bottom:11px}
.fcol h4::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;background:var(--accent)}
.fcol li{margin-bottom:9px;font-size:13.8px}
.fcol a:hover{color:#fff;padding-left:3px}
.fcol-pro ul{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
.f-tel{font-size:24px;color:var(--accent);font-weight:700;margin-bottom:12px;letter-spacing:.5px}
.f-info li,.f-sales li{font-size:13.5px;line-height:1.9}
.f-sales li b{color:#c3d3e9;margin-right:6px;font-weight:600}
.f-sales li span{color:var(--accent)}
.foot-bar{border-top:1px solid rgba(255,255,255,.09);padding:18px 0;font-size:13px}
.foot-bar .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.foot-bar a:hover{color:#fff}

/* ---------- 侧边工具 ---------- */
.side-tools{position:fixed;right:16px;bottom:80px;z-index:800;display:flex;flex-direction:column;gap:8px}
.st-item{width:54px;height:54px;border-radius:12px;background:#fff;box-shadow:var(--shadow-h);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;color:var(--txt2);border:1px solid var(--line)}
.st-item:hover{background:var(--blue);color:#fff;border-color:var(--blue)}
.st-item em{font-style:normal;font-size:11px}
.st-top{opacity:0;visibility:hidden;transition:.3s}
.st-top.show{opacity:1;visibility:visible}

.empty{text-align:center;padding:70px 20px;color:var(--txt3)}
.empty b{display:block;font-size:17px;color:var(--txt2);margin-bottom:6px}

/* ---------- 响应式 ---------- */
@media(max-width:1100px){
  .pro-grid{grid-template-columns:repeat(3,1fr)}
  .foot-main .wrap{grid-template-columns:1fr 1fr}
  .hd-search{display:none}
}
@media(max-width:900px){
  .layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .side-nav ul{display:grid;grid-template-columns:repeat(2,1fr)}
  .about-flex{grid-template-columns:1fr;gap:30px}
  .detail-top{grid-template-columns:1fr}
  .cat-grid,.case-grid,.news-grid,.contact-cards{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .brand-row{grid-template-columns:repeat(3,1fr)}
  .feature-strip .wrap{grid-template-columns:repeat(2,1fr)}
  .fs-item:nth-child(2){border-right:0}
  .fs-item:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .hero{height:430px}
  .hero h2{font-size:32px}
  .hero p{font-size:15px}
}
@media(max-width:760px){
  .topbar .tb-left{display:none}
  .topbar .wrap{justify-content:center}
  .menu-btn{display:flex}
  .header-main .wrap{height:64px}
  .nav{position:fixed;top:100px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px;box-shadow:var(--shadow-h);max-height:0;overflow:hidden;transition:.35s;gap:0}
  .nav.open{max-height:80vh;overflow-y:auto;padding:10px}
  .nav>a,.nav-item>a{height:48px;line-height:48px;padding:0 14px;border-bottom:1px solid var(--line)}
  .nav>a::after,.nav-item>a::after{display:none}
  .dropdown{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:0;padding:0 0 0 14px;display:none}
  .nav-item.expand .dropdown{display:block}
  .pro-grid,.pro-grid.in-page{grid-template-columns:repeat(2,1fr)}
  .cat-grid,.case-grid,.news-grid,.contact-cards,.form-grid{grid-template-columns:1fr}
  .section{padding:48px 0}
  .sec-head h3{font-size:25px}
  .hero{height:400px}
  .hero h2{font-size:27px}
  .list-row{flex-direction:column}
  .list-thumb{width:100%;height:180px}
  .foot-main .wrap{grid-template-columns:1fr}
  .foot-cta .wrap{flex-direction:column;text-align:center}
  .about-points{grid-template-columns:1fr}
  .gallery-thumbs{grid-template-columns:repeat(5,1fr)}
  .side-tools{right:10px;bottom:16px;flex-direction:row}
  .st-item{width:46px;height:46px}
  .st-item em{display:none}
  .pb-inner h2{font-size:25px}
  .page-banner{height:170px}
}