/* ============ 拓跃丝网企业官网 - 全局样式 ============ */
:root{
  --primary:#16406e; --primary-dark:#0f2c4e; --accent:#1e8a5a; --accent-light:#e6f4ed;
  --ink:#22303f; --muted:#64748b; --line:#e5eaf1; --bg:#f6f8fb; --card:#ffffff;
  --warn:#c05621; --grad:linear-gradient(135deg,#16406e 0%,#1e8a5a 100%);
  --shadow:0 4px 20px rgba(15,44,78,.08); --radius:12px;
  --container:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}

/* ===== 顶部通栏 ===== */
.topbar{background:var(--primary-dark);color:#cfe0f2;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:36px}
.topbar a{color:#fff;margin-left:18px}
.topbar .tb-tip{opacity:.85}

/* ===== 导航 ===== */
.header{background:#fff;position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(15,44,78,.07)}
.header .container{display:flex;align-items:center;height:72px;gap:28px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand img{height:52px;width:52px;object-fit:contain}
.brand .b-name{line-height:1.2}
.brand .b-name b{font-size:19px;color:var(--primary);display:block;letter-spacing:1px}
.brand .b-name span{font-size:11px;color:var(--muted);letter-spacing:.5px}
.nav{display:flex;gap:4px;flex:1}
.nav a{padding:8px 14px;border-radius:8px;font-size:15.5px;color:var(--ink);font-weight:500;transition:.2s}
.nav a:hover{color:var(--accent);background:var(--accent-light)}
.nav a.active{color:var(--accent);background:var(--accent-light);font-weight:600}
.header-cta{flex-shrink:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 26px;border-radius:10px;font-size:15.5px;font-weight:600;cursor:pointer;border:none;transition:.2s}
.btn-primary{background:var(--grad);color:#fff}
.btn-primary:hover{filter:brightness(1.1);transform:translateY(-1px)}
.btn-outline{border:2px solid #fff;color:#fff;background:transparent}
.btn-outline:hover{background:rgba(255,255,255,.15)}
.btn-ghost{border:1.5px solid var(--accent);color:var(--accent);background:#fff}
.btn-ghost:hover{background:var(--accent-light)}

/* ===== Hero ===== */
.hero{position:relative;color:#fff;overflow:hidden}
.hero .bg{position:absolute;inset:0;background:url('../images/workshop/workshop-06.jpg') center/cover no-repeat}
.hero .bg::after{content:'';position:absolute;inset:0;background:linear-gradient(100deg,rgba(10,30,58,.93) 25%,rgba(20,74,58,.82) 75%)}
.hero .container{position:relative;padding:92px 20px 100px;max-width:var(--container)}
.hero .h-tag{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);padding:5px 16px;border-radius:99px;font-size:13.5px;letter-spacing:2px;margin-bottom:22px}
.hero h1{font-size:44px;line-height:1.3;letter-spacing:1px;margin-bottom:18px;max-width:760px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#7ee2b0,#4fc3f7);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.desc{font-size:17.5px;opacity:.92;max-width:640px;margin-bottom:34px}
.hero .h-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero .h-feats{display:flex;gap:26px;margin-top:44px;flex-wrap:wrap}
.hero .h-feats span{font-size:14.5px;opacity:.95;display:flex;align-items:center;gap:7px}
.hero .h-feats span::before{content:'✔';color:#7ee2b0;font-weight:700}

/* ===== 数据条 ===== */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats .container{display:grid;grid-template-columns:repeat(4,1fr);padding:30px 20px}
.stat{text-align:center;position:relative}
.stat+.stat::before{content:'';position:absolute;left:0;top:15%;height:70%;width:1px;background:var(--line)}
.stat b{font-size:34px;color:var(--primary);font-weight:800}
.stat b i{font-style:normal;font-size:16px;color:var(--accent);margin-left:3px}
.stat span{display:block;color:var(--muted);font-size:14px;margin-top:2px}

/* ===== 通用 section ===== */
section.sec{padding:74px 0}
.sec-head{text-align:center;margin-bottom:46px}
.sec-head .en{font-size:13px;letter-spacing:3px;color:var(--accent);font-weight:700;text-transform:uppercase}
.sec-head h2{font-size:32px;color:var(--primary);margin:8px 0 12px;letter-spacing:1px}
.sec-head p{color:var(--muted);font-size:16px;max-width:680px;margin:0 auto}
.sec-head .more-link{display:inline-block;margin-top:14px;color:var(--accent);font-weight:600;font-size:15px}
.sec-head .more-link:hover{text-decoration:underline}

/* ===== 产品卡 ===== */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.prod-card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.25s;border:1px solid var(--line)}
.prod-card:hover{transform:translateY(-6px);box-shadow:0 14px 34px rgba(15,44,78,.14)}
.prod-card .pc-img{height:230px;overflow:hidden;background:#dfe7f0}
.prod-card .pc-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.prod-card:hover .pc-img img{transform:scale(1.06)}
.prod-card .pc-body{padding:22px 24px 26px}
.prod-card h3{font-size:19px;color:var(--primary);margin-bottom:8px}
.prod-card p{font-size:14.5px;color:var(--muted);margin-bottom:14px}
.prod-card .pc-spec{font-size:13px;color:var(--accent);background:var(--accent-light);display:inline-block;padding:4px 12px;border-radius:6px;font-weight:600}

/* ===== 价格表 ===== */
.price-box{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:34px 36px;border:1px solid var(--line)}
.price-box h3{color:var(--primary);font-size:21px;margin-bottom:6px}
.price-box .pb-note{color:var(--warn);font-size:13.5px;margin-bottom:18px}
table.price{width:100%;border-collapse:collapse;font-size:14.5px}
table.price th{background:var(--primary);color:#fff;padding:11px 12px;text-align:left;font-weight:600}
table.price th:first-child{border-radius:8px 0 0 0}
table.price th:last-child{border-radius:0 8px 0 0}
table.price td{padding:10px 12px;border-bottom:1px solid var(--line)}
table.price tr:nth-child(even) td{background:#f8fafc}
table.price .hot{color:var(--accent);font-weight:700}

/* ===== 优势 ===== */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.adv-item{background:var(--card);border-radius:var(--radius);padding:30px 28px;box-shadow:var(--shadow);border:1px solid var(--line);transition:.25s}
.adv-item:hover{border-color:var(--accent)}
.adv-item .ico{width:52px;height:52px;border-radius:12px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.adv-item h3{font-size:17.5px;color:var(--primary);margin-bottom:8px}
.adv-item p{font-size:14.5px;color:var(--muted)}

/* ===== 图墙 ===== */
.photo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.photo-grid .ph{border-radius:10px;overflow:hidden;position:relative;height:190px;background:#dfe7f0;cursor:pointer}
.photo-grid .ph img{width:100%;height:100%;object-fit:cover;transition:.35s}
.photo-grid .ph:hover img{transform:scale(1.07)}
.photo-grid .ph span{position:absolute;left:0;bottom:0;right:0;background:linear-gradient(transparent,rgba(10,30,58,.85));color:#fff;font-size:13px;padding:26px 12px 9px}

/* ===== 案例 ===== */
.case-filter{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:34px}
.case-filter button{padding:9px 22px;border-radius:99px;border:1.5px solid var(--line);background:#fff;color:var(--ink);font-size:14.5px;cursor:pointer;transition:.2s}
.case-filter button.active,.case-filter button:hover{background:var(--grad);color:#fff;border-color:transparent}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);transition:.25s}
.case-card:hover{transform:translateY(-5px)}
.case-card .cc-img{height:200px;overflow:hidden;background:#dfe7f0}
.case-card .cc-img img{width:100%;height:100%;object-fit:cover}
.case-card .cc-body{padding:20px 22px}
.case-card .cc-tag{font-size:12px;color:var(--accent);background:var(--accent-light);padding:3px 10px;border-radius:5px;font-weight:600}
.case-card h3{font-size:16.5px;color:var(--primary);margin:10px 0 6px;line-height:1.5}
.case-card p{font-size:13.5px;color:var(--muted)}
.case-list-sec ol{max-width:900px;margin:26px auto 0;columns:2;column-gap:46px;padding-left:22px;list-style:decimal}
.case-list-sec ol li{font-size:14.5px;color:var(--ink);padding:7px 0;border-bottom:1px dashed var(--line);break-inside:avoid}

/* ===== 文章列表 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:var(--card);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow);border:1px solid var(--line);transition:.25s;display:block}
.news-card:hover{border-color:var(--accent);transform:translateY(-4px)}
.news-card .n-q{font-size:12.5px;color:var(--accent);font-weight:700;letter-spacing:1px}
.news-card h3{font-size:16.5px;color:var(--primary);margin:8px 0 10px;line-height:1.55}
.news-card p{font-size:13.5px;color:var(--muted)}
.news-card .n-a{margin-top:12px;font-size:13.5px;color:var(--accent);font-weight:600}

/* ===== CTA 横幅 ===== */
.cta-band{background:var(--grad);color:#fff;padding:64px 0}
.cta-band .container{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cta-band h2{font-size:30px;margin-bottom:10px}
.cta-band p{opacity:.92;font-size:16px}
.cta-band .cb-phone{font-size:30px;font-weight:800;letter-spacing:1px}
.cta-band .cb-btns{display:flex;gap:14px;flex-wrap:wrap}

/* ===== 联系页 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:30px;align-items:start}
.contact-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.cc-card{background:var(--card);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);border:1px solid var(--line)}
.cc-card .ico{width:44px;height:44px;border-radius:10px;background:var(--accent-light);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:12px}
.cc-card h4{font-size:15px;color:var(--muted);font-weight:500}
.cc-card b{font-size:17px;color:var(--primary);word-break:break-all}
.cc-card .sub{font-size:12.5px;color:var(--muted);margin-top:3px}
.qr-card{text-align:center;padding:26px}
.qr-card img{width:180px;margin:0 auto 12px;border-radius:10px}
.qr-card p{font-size:13.5px;color:var(--muted)}
.inquiry-form{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);padding:34px 36px}
.inquiry-form h3{color:var(--primary);font-size:21px;margin-bottom:20px}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.inquiry-form input,.inquiry-form select,.inquiry-form textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:9px;font-size:14.5px;font-family:inherit;outline:none;transition:.2s;background:#fbfcfe}
.inquiry-form input:focus,.inquiry-form select:focus,.inquiry-form textarea:focus{border-color:var(--accent)}
.inquiry-form textarea{min-height:110px;resize:vertical}
.f-full{margin-bottom:16px}
.f-note{font-size:12.5px;color:var(--muted);margin-top:12px}

/* ===== 页脚 ===== */
.footer{background:var(--primary-dark);color:#a8bdd4;padding:56px 0 0;font-size:14px}
.footer .container{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer .f-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer .f-brand img{height:44px;width:44px;object-fit:contain;background:#fff;border-radius:8px;padding:3px}
.footer .f-brand b{color:#fff;font-size:17px}
.footer p{margin-bottom:8px;line-height:1.7}
.footer a:hover{color:#fff}
.footer .f-phone{color:#7ee2b0;font-size:19px;font-weight:700}
.footer .f-qr{width:110px;background:#fff;padding:6px;border-radius:8px;margin-top:8px}
.footer .copyright{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;text-align:center;font-size:13px;color:#7a92ab}
.footer ul li{margin-bottom:9px}

/* ===== 浮动按钮 ===== */
.float-btns{position:fixed;right:22px;bottom:26px;display:flex;flex-direction:column;gap:12px;z-index:90}
.float-btns .fb{width:52px;height:52px;border-radius:50%;background:#fff;box-shadow:0 4px 16px rgba(15,44,78,.18);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:.2s;border:1px solid var(--line);font-size:22px}
.float-btns .fb:hover{transform:translateY(-3px)}
.float-btns .fb-phone{width:auto;height:52px;border-radius:999px;background:var(--grad);color:#fff;border:none;padding:0 22px;font-size:17px;font-weight:700;letter-spacing:.3px;white-space:nowrap;text-decoration:none;box-shadow:0 6px 18px rgba(30,138,90,.35)}
.float-btns .fb-wx{color:var(--accent);font-weight:700;font-size:15px}
.float-btns .fb-top{color:var(--primary)}

/* 微信弹窗 */
.wx-modal{display:none;position:fixed;inset:0;background:rgba(10,25,45,.55);z-index:200;align-items:center;justify-content:center}
.wx-modal.show{display:flex}
.wx-modal .box{background:#fff;border-radius:14px;padding:30px 34px;text-align:center;max-width:320px}
.wx-modal img{width:230px;margin:14px auto}
.wx-modal h3{color:var(--primary)}
.wx-modal p{font-size:14px;color:var(--muted)}
.wx-modal .close{margin-top:14px;font-size:13px;color:var(--muted);cursor:pointer}

/* 面包屑 */
.crumb{background:#fff;border-bottom:1px solid var(--line)}
.crumb .container{padding:14px 20px;font-size:13.5px;color:var(--muted)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--accent)}

/* 页头 banner（内页） */
.page-hero{background:var(--grad);color:#fff;padding:56px 0;text-align:center}
.page-hero h1{font-size:34px;letter-spacing:1px;margin-bottom:10px}
.page-hero p{opacity:.9;font-size:16px}

/* 时间线（发展历程） */
.timeline{max-width:820px;margin:0 auto;position:relative;padding-left:26px}
.timeline::before{content:'';position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(#16406e,#1e8a5a)}
.tl-item{position:relative;padding:0 0 26px 24px}
.tl-item::before{content:'';position:absolute;left:-26px;top:7px;width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--accent)}
.tl-item b{color:var(--primary);font-size:16.5px}
.tl-item p{font-size:14.5px;color:var(--muted);margin-top:2px}

/* 视频区 */
.video-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.video-box{background:#0f2c4e;border-radius:var(--radius);overflow:hidden}
.video-box video{width:100%;display:block}
.video-box .v-cap{color:#cfe0f2;font-size:14px;padding:14px 18px}

/* 响应式 */
@media(max-width:1000px){
  .prod-grid,.adv-grid,.case-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
  .photo-grid{grid-template-columns:repeat(3,1fr)}
  .footer .container{grid-template-columns:1fr 1fr}
  .stats .container{grid-template-columns:repeat(2,1fr);gap:18px}
  .stat:nth-child(3)::before{display:none}
  .hero h1{font-size:34px}
  .nav{display:none}
  .contact-grid,.video-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
  .prod-grid,.adv-grid,.case-grid,.news-grid{grid-template-columns:1fr}
  .photo-grid{grid-template-columns:repeat(2,1fr)}
  .footer .container{grid-template-columns:1fr}
  .hero h1{font-size:27px}
  .hero .container{padding:64px 20px 72px}
  .f-row{grid-template-columns:1fr}
  .topbar .tb-tip{display:none}
  .cta-band .container{justify-content:center;text-align:center}
  .float-btns{right:14px;bottom:18px;gap:10px}
  .float-btns .fb-phone{height:46px;padding:0 16px;font-size:15px}
  .float-btns .fb{width:46px;height:46px;font-size:19px}
}

/* ===== 企业资质墙 ===== */
.cert-group{margin-top:36px}
.cert-group:first-of-type{margin-top:0}
.cert-group h3{font-size:19px;color:var(--primary);padding-left:12px;border-left:4px solid var(--accent);margin-bottom:4px}
.cert-group h3 small{font-size:13px;color:var(--muted);font-weight:400;margin-left:10px}
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:16px}
.cert-item{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;cursor:zoom-in;transition:.25s;box-shadow:var(--shadow);margin:0}
.cert-item:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 14px 30px rgba(22,64,110,.15)}
.cert-item img{width:100%;height:230px;object-fit:contain;background:#f6f8fb;padding:10px;display:block}
.cert-item figcaption{padding:10px 12px;font-size:13.5px;color:var(--primary);text-align:center;border-top:1px solid var(--line);font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
/* 证书灯箱 */
.lightbox{position:fixed;inset:0;background:rgba(13,32,56,.93);display:none;flex-direction:column;align-items:center;justify-content:center;z-index:9999;padding:24px}
.lightbox.show{display:flex}
.lightbox img{max-width:min(92vw,880px);max-height:76vh;border-radius:8px;box-shadow:0 24px 70px rgba(0,0,0,.55);background:#fff;padding:10px}
.lightbox .lb-cap{color:#fff;margin-top:14px;font-size:15px;letter-spacing:.5px}
.lightbox .lb-close{position:absolute;top:8px;right:24px;color:#fff;font-size:44px;cursor:pointer;line-height:1}
.lightbox .lb-close:hover{color:#ffc4a3}
@media(max-width:640px){
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .cert-item img{height:150px}
}