/* ============ 基础 ============ */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --red:#e70012; --red-d:#c4000e; --red-l:#ff3b4a;
  --blue:#02438E; --blue-d:#012b5c; --blue-l:#1260b8;
  --ink:#1c2130; --txt:#4a5161; --mut:#8a91a3;
  --line:#e6e9f0; --bg:#f6f7fb; --white:#fff;
  --radius:10px;
  --shadow:0 6px 24px rgba(2,67,142,.08);
}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;color:var(--ink);background:var(--white);font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section.bg-gray{background:var(--bg)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 48px}
.sec-tag{display:inline-block;background:rgba(231,0,18,.08);color:var(--red);font-size:13px;font-weight:600;padding:4px 14px;border-radius:20px;letter-spacing:1px}
.sec-head h2{font-size:32px;font-weight:700;margin:14px 0 10px;line-height:1.3}
.sec-head .sub{color:var(--txt);font-size:15px}
.sec-head .line{width:56px;height:3px;background:linear-gradient(90deg,var(--red),var(--red-l));border-radius:2px;margin:16px auto 0}
.btn{display:inline-block;background:linear-gradient(135deg,var(--red),var(--red-d));color:#fff;font-weight:600;padding:13px 30px;border-radius:8px;font-size:15px;transition:.25s;border:none;cursor:pointer;text-align:center}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(231,0,18,.32)}
.btn.ghost{background:transparent;border:1.5px solid rgba(255,255,255,.85);color:#fff}
.btn.blue{background:linear-gradient(135deg,var(--blue-l),var(--blue));box-shadow:0 8px 22px rgba(2,67,142,.3)}
.btn.sm{padding:11px 20px;font-size:14px;min-height:44px;line-height:1.4;display:inline-flex;align-items:center;justify-content:center}
h3{line-height:1.5}
/* ============ 顶部条 ============ */
.topbar{background:var(--blue-d);color:#cfe0f5;font-size:12.5px;padding:7px 0}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:12px}
.topbar a{color:#fff}
.topbar .tb-item{display:inline-flex;align-items:center;gap:6px;margin-right:18px}
.topbar .tb-item svg{width:14px;height:14px;fill:currentColor}
/* ============ 导航 ============ */
.navbar{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 2px 14px rgba(28,33,48,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;cursor:pointer}
.logo .logo-mark{width:42px;height:42px;border-radius:10px;background:linear-gradient(135deg,var(--red),var(--red-d));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:13px;letter-spacing:1px;box-shadow:0 4px 12px rgba(231,0,18,.35)}
.logo .logo-txt b{display:block;font-size:17px;color:var(--ink);line-height:1.25}
.logo .logo-txt b em{font-style:normal;color:var(--red)}
.logo .logo-txt span{font-size:11px;color:var(--mut);letter-spacing:1px}
.nav-menu{display:flex;align-items:center;gap:2px}
.nav-menu>li{position:relative}
.nav-menu>li>a{display:flex;align-items:center;gap:4px;padding:24px 15px;font-size:15px;font-weight:500;color:var(--ink);transition:.2s;border-bottom:3px solid transparent}
.nav-menu>li>a:hover,.nav-menu>li.active>a{color:var(--red);border-bottom-color:var(--red)}
.nav-menu>li>a .caret{width:8px;height:8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px)}
.submenu{position:absolute;top:100%;left:0;min-width:210px;background:#fff;border-radius:0 0 10px 10px;box-shadow:0 14px 34px rgba(28,33,48,.14);padding:8px;opacity:0;visibility:hidden;transform:translateY(10px);transition:.22s;z-index:999}
.nav-menu>li:hover .submenu,.nav-menu>li:focus-within .submenu{opacity:1;visibility:visible;transform:translateY(0)}
.submenu a{display:block;padding:10px 14px;font-size:14px;color:var(--txt);border-radius:6px;transition:.15s}
.submenu a:hover{background:rgba(231,0,18,.07);color:var(--red);padding-left:18px}
.nav-cta{margin-left:14px}
.hamburger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.hamburger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* ============ 通用卡片 ============ */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.28s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.card .ic{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;font-size:24px}
.ic-red{background:rgba(231,0,18,.09);color:var(--red)}
.ic-blue{background:rgba(2,67,142,.09);color:var(--blue)}
.card h3{font-size:17.5px;margin-bottom:8px}
.card p{font-size:13.5px;color:var(--txt);flex:1}
.card .more{display:inline-block;margin-top:16px;font-size:13.5px;color:var(--blue);font-weight:600}
.card .more i{display:inline-flex;width:22px;height:22px;border-radius:50%;background:rgba(2,67,142,.1);color:var(--blue);align-items:center;justify-content:center;font-style:normal;font-weight:800;margin-left:4px;transition:.2s}
.card .more:hover i{background:var(--red);color:#fff}
.card .num{position:absolute;top:14px;right:18px;font-size:42px;font-weight:800;color:rgba(2,67,142,.06)}
/* ============ 服务详情页组件 ============ */
.page-banner{background:linear-gradient(120deg,var(--blue-d),var(--blue));color:#fff;padding:56px 0 64px;position:relative;overflow:hidden}
.page-banner::after{content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;border:36px solid rgba(255,255,255,.05)}
.page-banner .crumb{font-size:13px;color:#a8c4ea;margin-bottom:12px}
.page-banner .crumb a:hover{color:#fff}
.page-banner h1{font-size:34px;font-weight:800;margin-bottom:10px}
.page-banner p{color:#c7d8f2;max-width:700px;font-size:15px}
.crumb i{font-style:normal;margin:0 8px}
.breadcrumb-bar{background:var(--bg);border-bottom:1px solid var(--line);padding:10px 0;font-size:13px;color:var(--mut)}
.breadcrumb-bar a{color:var(--blue)}
.breadcrumb-bar a:hover{color:var(--red)}
.detail-article{max-width:960px;margin:0 auto}
.detail-article .lead{font-size:16.5px;color:var(--ink);background:rgba(2,67,142,.05);border-left:4px solid var(--blue);padding:18px 22px;border-radius:0 10px 10px 0;margin:26px 0}
.detail-block{margin:30px 0}
.detail-block h3{font-size:20px;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.detail-block h3::before{content:"";width:5px;height:20px;background:linear-gradient(180deg,var(--red),var(--red-l));border-radius:3px}
.detail-block p{color:var(--txt);margin-bottom:10px}
.detail-list li{display:flex;gap:10px;color:var(--txt);margin-bottom:10px;font-size:14.5px}
.detail-list li::before{content:"●";color:var(--red);font-size:12px;flex-shrink:0;line-height:1.9}
.panel-adv{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.panel-adv h4{color:var(--blue);font-size:16px;margin-bottom:12px;display:flex;align-items:center;gap:8px}
/* ============ 服务区块 ============ */
.svc-head{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-bottom:34px}
.svc-num{font-size:46px;font-weight:800;line-height:1;color:rgba(231,0,18,.16);flex-shrink:0}
.svc-head .svc-t{flex:1;min-width:220px}
.svc-tag{display:inline-block;background:rgba(231,0,18,.08);color:var(--red);font-size:12.5px;font-weight:600;padding:3px 12px;border-radius:16px;letter-spacing:1px;margin-bottom:6px}
.svc-head h2{font-size:28px;line-height:1.3}
.svc-head .svc-p{color:var(--txt);font-size:14.5px}
.svc-head .btn{margin-left:auto;flex-shrink:0}
.svc-grid{display:grid;grid-template-columns:1.62fr 1fr;gap:26px;align-items:start}
.svc-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.svc-main .lead{font-size:16px;color:var(--ink);background:rgba(2,67,142,.05);border-left:4px solid var(--blue);padding:16px 20px;border-radius:0 10px 10px 0;margin:0 0 26px}
.svc-main .detail-block{margin:0 0 26px}
.svc-side{display:flex;flex-direction:column;gap:18px}
.svc-side .panel-adv{margin:0}
.svc-side .panel-adv h4{color:var(--red)}
/* ============ 数字服务能力 ============ */
.dig-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.28s}
.dig-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.dig-card .ic{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;font-size:24px}
.dig-card h4{font-size:16.5px;margin-bottom:8px}
.dig-card p{font-size:13.5px;color:var(--txt)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.tag-row span{background:rgba(2,67,142,.07);color:var(--blue);font-size:13px;padding:6px 16px;border-radius:20px;font-weight:500}
/* ============ 价格 ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.price-card{background:#fff;border:1.5px solid var(--line);border-radius:16px;overflow:hidden;transition:.28s;position:relative;display:flex;flex-direction:column}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.price-card.hot{border-color:var(--red);box-shadow:0 12px 34px rgba(231,0,18,.16)}
.price-card .tag{position:absolute;top:16px;left:-34px;background:var(--red);color:#fff;font-size:11px;padding:4px 38px;transform:rotate(-45deg)}
.price-head{padding:26px 24px 20px;color:#fff;background:linear-gradient(135deg,var(--blue-d),var(--blue))}
.price-card.hot .price-head{background:linear-gradient(135deg,var(--red-d),var(--red))}
.price-head h4{font-size:19px;margin-bottom:4px}
.price-head .price{font-size:13px;color:rgba(255,255,255,.85)}
.price-head .price b{font-size:34px;font-weight:800;color:#fff;margin-right:4px}
.price-body{padding:22px 24px;flex:1}
.price-body li{display:flex;gap:8px;font-size:13.5px;color:var(--txt);margin-bottom:10px}
.price-body li::before{content:"✓";color:var(--red);font-weight:700;flex-shrink:0}
.price-card.hot .price-body li::before{color:var(--red)}
.price-foot{padding:0 24px 24px;text-align:center}
/* ============ CTA ============ */
.cta-band{background:linear-gradient(120deg,var(--red-d),var(--red));color:#fff;padding:60px 0;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;left:-80px;bottom:-120px;width:340px;height:340px;border-radius:50%;border:44px solid rgba(255,255,255,.07)}
.cta-band h2{font-size:30px;font-weight:800;margin-bottom:12px}
.cta-band p{opacity:.92;margin-bottom:26px;font-size:15px}
.cta-band .btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
/* ============ 联系 ============ */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:34px;align-items:start}
.cinfo{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.cinfo-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px dashed var(--line)}
.cinfo-item:last-child{border-bottom:none}
.cinfo-item .ic{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,var(--blue-l),var(--blue));color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.cinfo-item b{display:block;font-size:15px;margin-bottom:3px}
.cinfo-item span{color:var(--txt);font-size:14px}
.cform{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.cform label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px;color:var(--ink)}
.cform input,.cform select,.cform textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:12px 14px;font-size:14.5px;font-family:inherit;margin-bottom:18px;background:var(--bg);transition:.2s;color:var(--ink)}
.cform input:focus,.cform select:focus,.cform textarea:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px rgba(2,67,142,.1)}
.cform textarea{resize:vertical;min-height:120px}
.form-ok{display:none;background:#e8f7ee;border:1px solid #bfe8cf;color:#1d7a46;padding:14px 16px;border-radius:8px;font-size:14px;margin-top:4px}
/* ============ 页脚 ============ */
.footer{background:#101a30;color:#9fb0cc;font-size:13.5px}
.footer-main{padding:56px 0 40px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
.footer h5{color:#fff;font-size:15.5px;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer h5::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;background:var(--red)}
.footer li{margin-bottom:10px}
.footer li a:hover{color:#fff}
.footer .f-about p{margin-bottom:14px;line-height:1.9}
.footer .f-contact li{display:flex;gap:10px;align-items:flex-start}
.footer .f-contact li b{color:#cfe0f5;font-weight:600;white-space:nowrap}
.footer .f-contact .icon{width:30px;height:30px;border-radius:8px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--red-l);font-size:15px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;text-align:center;color:#6d7f9f;font-size:12.5px}
.footer-bottom a{color:#8fa3c4}
.footer-bottom a:hover{color:#fff}
/* ============ 浮动咨询 ============ */
.float-phone{position:fixed;right:22px;bottom:26px;z-index:1200;width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--red),var(--red-d));color:#fff;display:flex;align-items:center;justify-content:center;font-size:26px;box-shadow:0 10px 26px rgba(231,0,18,.4);transition:.25s;animation:pulse 2.4s infinite}
.float-phone:hover{transform:translateY(-4px) scale(1.05)}
@keyframes pulse{0%{box-shadow:0 10px 26px rgba(231,0,18,.4)}50%{box-shadow:0 10px 30px rgba(231,0,18,.65)}100%{box-shadow:0 10px 26px rgba(231,0,18,.4)}}
@media(max-width:768px){.float-phone{right:16px;bottom:18px;width:52px;height:52px;font-size:24px}}
/* ============ 滚动显现 ============ */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .55s ease,transform .55s ease}
.reveal.in{opacity:1;transform:none}
/* ============ 响应式 ============ */
@media(max-width:1024px){
  .grid3,.grid4{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:repeat(2,1fr)}
  .footer-main{grid-template-columns:1fr 1fr;gap:30px}
  .svc-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .section{padding:54px 0}
  .sec-head h2{font-size:26px}
  .hamburger{display:flex}
  .nav-menu{position:fixed;top:0;right:-100%;width:78%;max-width:340px;height:100vh;background:#fff;flex-direction:column;align-items:stretch;padding:76px 20px 30px;box-shadow:-12px 0 40px rgba(0,0,0,.16);transition:right .32s ease;overflow-y:auto;z-index:999}
  .nav-menu.open{right:0}
  .nav-menu>li>a{padding:14px 12px;border-bottom:1px solid var(--line);border-left:3px solid transparent}
  .nav-menu>li>a:hover,.nav-menu>li.active>a{border-bottom-color:var(--line);border-left-color:var(--red)}
  .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;padding:0 0 6px 14px;display:none}
  .nav-menu>li.open-m .submenu{display:block}
  .nav-cta{margin-left:0;margin-top:16px;text-align:center}
  .nav-mask{position:fixed;inset:0;background:rgba(10,16,32,.5);z-index:998;display:none}
  .nav-mask.show{display:block}
  .topbar .tb-addr{display:none}
  .topbar .tb-slogan{display:none}
}
@media(max-width:560px){
  .grid3,.grid4,.price-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-main{grid-template-columns:1fr;gap:28px}
  .page-banner h1{font-size:27px}
  .cta-band h2{font-size:24px}
  .svc-head .btn{width:100%;margin-left:0}
  .svc-main,.svc-side .panel-adv{padding:22px}
  .svc-head h2{font-size:24px}
}
/* 小屏收紧：390px（主流手机） */
@media(max-width:390px){
  .section{padding:46px 0}
  .sec-head h2{font-size:23px}
  .svc-num{font-size:36px}
  .svc-head{padding-left:2px}
  .page-banner h1{font-size:25px}
  .detail-block h3{font-size:17px}
  .svc-main .lead{font-size:15px;padding:14px 16px}
  .panel-adv{padding:20px}
  .svc-side .panel-adv h4{font-size:15px}
  .crumb{font-size:12px}
  .nav-cta .btn{width:100%}
}
/* 极小屏：320px */
@media(max-width:320px){
  .container{padding:0 14px}
  .svc-head{gap:14px}
  .svc-head h2{font-size:21px}
  .svc-head .svc-p{font-size:13.5px}
  .card{padding:22px}
  .card .num{font-size:34px}
  .price-head .price b{font-size:28px}
  .cform{padding:22px}
  .cform input,.cform select,.cform textarea{padding:11px 12px}
  .tag-row span{font-size:12px;padding:5px 12px}
  .footer-main{padding:40px 0 30px}
}
/* 桌面端明确断点（1440 等宽屏） */
@media(min-width:1025px){
  .svc-grid{grid-template-columns:1.62fr 1fr}
  .grid3{grid-template-columns:repeat(3,1fr)}
  .grid4{grid-template-columns:repeat(4,1fr)}
  .price-grid{grid-template-columns:repeat(3,1fr)}
}