/* ============ 设计令牌 ============ */
:root{
  --paper:#FFFFFF;
  --ice:#EFF5FC;
  --ice-d:#E2EDF9;
  --ink:#101E2E;
  --deep:#0F2440;
  --text:#4E5D6F;
  --weak:#8CA0B5;
  --blue:#2F6FED;
  --blue-d:#2057C4;
  --sky:#DCE9FB;
  --line:#E8F0F8;
  --mono:ui-monospace,Consolas,"Cascadia Mono",monospace;
  --sans:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --maxw:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--text);background:var(--paper);font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:var(--sans)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 26px}
h1,h2,h3{color:var(--ink);font-weight:800;letter-spacing:-.01em;line-height:1.2}
section{padding:104px 0}
[id]{scroll-margin-top:100px}
.mono{font-family:var(--mono)}

/* ============ 顶部：极简单行导航 ============ */
header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.nav-row{display:flex;align-items:center;height:66px;gap:26px}
.brand{display:flex;align-items:center;gap:10px;margin-right:auto}
.brand .mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(140deg,var(--blue),#6FB4FF);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:15px}
.brand .name{font-weight:800;color:var(--ink);font-size:16.5px}
.nav-links{display:flex;gap:2px}
.nav-links a{padding:9px 15px;border-radius:9px;font-size:14px;font-weight:600;color:var(--text);transition:all .2s}
.nav-links a:hover{color:var(--ink);background:var(--ice)}
.nav-links a.active{color:var(--blue)}
.nav-cta{background:var(--ink);color:#fff;font-size:13.5px;font-weight:700;padding:10px 22px;border-radius:999px;transition:all .25s}
.nav-cta:hover{background:var(--blue);transform:translateY(-1px)}
.lang-switch{display:flex;background:var(--ice);border-radius:999px;padding:3px}
.lang-switch a,.lang-switch button{border:none;background:none;color:var(--weak);font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px;cursor:pointer;transition:all .2s}
.lang-switch a.on,.lang-switch button.on{background:var(--paper);color:var(--ink);box-shadow:0 2px 8px rgba(16,30,46,.1)}
.hamburger{display:none;background:none;border:1.5px solid var(--line);border-radius:9px;padding:7px;cursor:pointer;color:var(--ink)}
.mobile-menu{display:none}

/* ============ Hero：左文案 + 右配置器App仿真 ============ */
.hero{padding:72px 0 96px;background:
  radial-gradient(1000px 540px at 86% -18%,var(--sky) 0%,transparent 58%),
  radial-gradient(760px 460px at -10% 112%,var(--ice-d) 0%,transparent 55%),
  linear-gradient(180deg,#F3F8FE 0%,var(--paper) 100%)}
.hero .wrap{display:grid;grid-template-columns:.92fr 1.08fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(36px,4.8vw,60px);line-height:1.14}
.hero h1 .b{color:var(--blue)}
.hero .sub{margin-top:22px;font-size:16.5px;max-width:440px}
.hero .cta{margin-top:34px;display:flex;gap:13px;flex-wrap:wrap;align-items:center}
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:15px;border-radius:999px;padding:15px 30px;cursor:pointer;border:none;transition:all .25s}
.btn-blue{background:var(--blue);color:#fff;box-shadow:0 10px 24px rgba(47,111,237,.34)}
.btn-blue:hover{background:var(--blue-d);transform:translateY(-2px)}
.btn-txt{background:none;color:var(--ink);padding:15px 8px}
.btn-txt:hover{color:var(--blue)}
.hero .facts{margin-top:46px;display:flex;gap:34px;flex-wrap:wrap}
.hero .facts .f b{display:block;font-family:var(--mono);font-size:23px;color:var(--ink)}
.hero .facts .f b em{font-style:normal;color:var(--blue)}
.hero .facts .f span{font-size:12.5px;color:var(--weak)}

/* --- 配置器 App 仿真界面 --- */
.app{background:var(--paper);border:1px solid var(--line);border-radius:20px;box-shadow:0 30px 70px rgba(15,36,64,.16);overflow:hidden}
.app-top{display:flex;align-items:center;gap:8px;padding:13px 18px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#FBFDFF,var(--paper))}
.app-top i{width:10px;height:10px;border-radius:50%;background:var(--ice-d)}
.app-top i:nth-child(1){background:#FCA5A5}.app-top i:nth-child(2){background:#FCD34D}.app-top i:nth-child(3){background:#86EFAC}
.app-top .ttl{margin-left:8px;font-family:var(--mono);font-size:12px;color:var(--weak);letter-spacing:.05em}
.app-body{display:grid;grid-template-columns:172px 1fr;min-height:330px}
/* 3D 视口 */
.viewport{position:relative;background:
  radial-gradient(420px 300px at 50% 62%,#E9F2FD 0%,transparent 70%),
  linear-gradient(180deg,#FDFEFF,#F5F9FE);
  display:flex;align-items:center;justify-content:center;overflow:hidden}
.viewport .coord{position:absolute;left:16px;bottom:12px;font-family:var(--mono);font-size:11px;color:var(--weak)}
.viewport .grid-bg{position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:44px 44px;opacity:.5;mask-image:radial-gradient(circle at 50% 55%,#000 30%,transparent 75%);-webkit-mask-image:radial-gradient(circle at 50% 55%,#000 30%,transparent 75%)}
.cube-scene{width:172px;height:172px;perspective:640px;cursor:grab;touch-action:none;position:relative;z-index:1}
.cube-scene:active{cursor:grabbing}
.cube{position:relative;width:100%;height:100%;transform-style:preserve-3d;animation:spin 18s linear infinite}
.cube-scene.drag .cube{animation:none}
@keyframes spin{from{transform:rotateX(-20deg) rotateY(0)}to{transform:rotateX(-20deg) rotateY(360deg)}}
/* 材质外观 */
.cube.m-metal .face{background:linear-gradient(135deg,#E8F1FC 0%,var(--cube-c,#4A8AF7) 38%,var(--cube-c2,#2F6FED) 62%,#E8F1FC 100%)}
.cube.m-matte .face{background:var(--cube-c2,#2F6FED)}
.cube.m-glass .face{background:linear-gradient(140deg,rgba(255,255,255,.5),color-mix(in srgb,var(--cube-c2,#2F6FED) 55%,transparent));backdrop-filter:blur(2px);border-color:rgba(255,255,255,.65)}
.face{position:absolute;inset:0;display:flex;align-items:flex-end;justify-content:flex-start;padding:12px;font-family:var(--mono);font-size:10.5px;color:rgba(255,255,255,.92);letter-spacing:.08em;
  background:linear-gradient(145deg,var(--cube-c,#4A8AF7),var(--cube-c2,#2F6FED));
  border:1px solid rgba(255,255,255,.3);border-radius:5px;transition:background .4s}
.f-front{transform:translateZ(86px)}.f-back{transform:rotateY(180deg) translateZ(86px)}
.f-right{transform:rotateY(90deg) translateZ(86px)}.f-left{transform:rotateY(-90deg) translateZ(86px)}
.f-top{transform:rotateX(90deg) translateZ(86px)}.f-bottom{transform:rotateX(-90deg) translateZ(86px)}

/* ============ 行业跑马灯 ============ */
.marquee{background:var(--ink);padding:20px 0;overflow:hidden}
.marquee .track{display:flex;gap:56px;width:max-content;animation:mar 26s linear infinite}
.marquee:hover .track{animation-play-state:paused}
@keyframes mar{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.marquee span{font-family:var(--mono);font-size:14px;color:#9FB2C8;letter-spacing:.12em;white-space:nowrap;display:flex;align-items:center;gap:56px}
.marquee span::after{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue)}

/* ============ 价值主张：非对称双栏 ============ */
.sec-why{background:var(--paper)}
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:start}
.why-left h2{font-size:clamp(30px,3.8vw,46px);line-height:1.22}
.why-left h2 .b{color:var(--blue)}
.why-left p{margin-top:20px;font-size:16px;max-width:420px}
.why-left .fact{margin-top:34px;display:inline-flex;flex-direction:column;gap:4px;background:var(--ice);border-radius:16px;padding:20px 26px}
.why-left .fact b{font-family:var(--mono);font-size:26px;color:var(--blue)}
.why-left .fact span{font-size:13px;color:var(--text)}
.why-right{display:flex;flex-direction:column;gap:14px}
.why-item{display:grid;grid-template-columns:46px 1fr;gap:18px;background:var(--ice);border-radius:16px;padding:24px 26px;transition:all .25s}
.why-item:hover{background:var(--sky);transform:translateX(6px)}
.why-item .ic{width:46px;height:46px;border-radius:12px;background:var(--paper);color:var(--blue);display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(16,30,46,.08)}
.why-item h3{font-size:16.5px;margin-bottom:5px}
.why-item p{font-size:13.5px}

/* ============ 对比：深蓝全宽横幅 ============ */
.sec-vs{background:var(--deep);padding:96px 0}
.sec-vs h2{color:#fff;font-size:clamp(27px,3.4vw,40px);text-align:center;margin-bottom:56px}
.sec-vs h2 .dim{color:#5B7A9E}
.vs-cols{display:grid;grid-template-columns:1fr 1fr;gap:0;max-width:920px;margin:0 auto;border-radius:20px;overflow:hidden}
.vs-col{padding:40px 42px}
.vs-col.old{background:#16304F}
.vs-col.new{background:var(--blue)}
.vs-col .cap{font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;margin-bottom:16px;color:rgba(255,255,255,.55)}
.vs-col h3{color:#fff;font-size:20px;margin-bottom:18px}
.vs-col li{display:flex;gap:11px;padding:9px 0;font-size:14px;color:rgba(255,255,255,.82);align-items:flex-start}
.vs-col li svg{flex-shrink:0;margin-top:5px;opacity:.9}

/* ============ 服务：大字清单（悬停交互） ============ */
.svc-list{border-top:1px solid var(--line)}
.svc-row{display:grid;grid-template-columns:1fr 1.1fr auto;gap:28px;align-items:center;padding:34px 18px;border-bottom:1px solid var(--line);border-radius:14px;transition:all .25s;cursor:pointer}
.svc-row:hover{background:var(--ice);transform:translateX(8px)}
.svc-row h3{font-size:clamp(20px,2.6vw,30px);display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.svc-row .hot{font-family:var(--mono);font-size:11px;color:#fff;background:var(--blue);padding:3px 11px;border-radius:999px;letter-spacing:.1em}
.svc-row p{font-size:14px}
.svc-row .arrow{width:46px;height:46px;border-radius:50%;border:1.5px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--ink);transition:all .25s}
.svc-row:hover .arrow{background:var(--blue);border-color:var(--blue);color:#fff;transform:rotate(-45deg)}

/* ============ 案例：横向滚动 ============ */
.sec-cases{background:var(--ice);overflow:hidden}
.cases-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:44px;flex-wrap:wrap}
.cases-head h2{font-size:clamp(27px,3.4vw,40px)}
.cases-head .drag-hint{font-family:var(--mono);font-size:12.5px;color:var(--weak);padding-bottom:8px}
.case-scroller{display:flex;gap:20px;overflow-x:auto;padding:4px 4px 22px;margin:0 -4px;scroll-snap-type:x mandatory;scrollbar-width:thin;scrollbar-color:var(--sky-d,#C9DDF6) transparent}
.case{flex:0 0 340px;scroll-snap-align:start;background:var(--paper);border-radius:20px;overflow:hidden;border:1px solid var(--line);transition:all .3s}
.case:hover{transform:translateY(-5px);box-shadow:0 20px 46px rgba(15,36,64,.12)}
.case .thumb{aspect-ratio:16/10;background:linear-gradient(150deg,var(--sky),#F6FAFE);display:flex;align-items:center;justify-content:center;color:var(--weak);font-size:12.5px;font-family:var(--mono)}
.case .body{padding:24px 26px 28px}
.case .cat{font-family:var(--mono);font-size:11px;color:var(--blue);letter-spacing:.12em}
.case h3{font-size:17px;margin:9px 0 7px}
.case p{font-size:13.5px}

/* ============ 流程：横向步骤带 ============ */
.flow-band{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:var(--paper);border:1px solid var(--line);border-radius:22px;overflow:hidden}
.flow-step{padding:44px 34px;border-left:1px solid var(--line);position:relative;transition:background .3s}
.flow-step:first-child{border-left:none}
.flow-step:hover{background:var(--ice)}
.flow-step .n{font-family:var(--mono);font-size:15px;color:var(--blue);background:var(--sky);width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:700;margin-bottom:22px}
.flow-step h3{font-size:17px;margin-bottom:8px}
.flow-step p{font-size:13.5px}

/* ============ FAQ ============ */
.sec-faq{background:var(--ice)}
.faq-wrap{max-width:780px;margin:0 auto}
.faq-item{background:var(--paper);border-radius:16px;margin-bottom:12px;border:1px solid transparent;overflow:hidden;transition:all .25s}
.faq-item.open{border-color:var(--sky-d,#C9DDF6);box-shadow:0 12px 30px rgba(15,36,64,.08)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;background:none;border:none;padding:21px 26px;font-size:15.5px;font-weight:700;color:var(--ink);cursor:pointer;text-align:left}
.faq-q .pm{flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--ice);color:var(--blue);display:flex;align-items:center;justify-content:center;transition:all .3s}
.faq-item.open .pm{background:var(--blue);color:#fff;transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 26px 22px;font-size:14.5px}

/* ============ CTA：深蓝全宽 ============ */
.sec-cta{padding:100px 0;text-align:center}
.cta-box{background:linear-gradient(120deg,var(--blue) 0%,#4A90F0 55%,#6FB4FF 100%);border-radius:28px;padding:72px 64px 56px;position:relative;overflow:hidden}
.cta-box::before{content:"";position:absolute;width:300px;height:300px;border-radius:50%;border:54px solid rgba(255,255,255,.1);left:-110px;top:-110px}
.cta-box::after{content:"";position:absolute;width:220px;height:220px;border-radius:50%;border:40px solid rgba(255,255,255,.08);right:-70px;bottom:-100px}
.cta-box h2,.cta-box>p{position:relative;z-index:1}
.cta-box h2{color:#fff;font-size:clamp(24px,3.4vw,38px)}
.cta-box>p{color:rgba(255,255,255,.88);margin:16px auto 0;font-size:15.5px;max-width:480px}
/* 一行式胶囊表单 */
.cta-form{position:relative;z-index:1;display:flex;gap:12px;margin-top:44px;max-width:980px;margin-left:auto;margin-right:auto}
.cta-form input{flex:1;min-width:0;font-family:var(--sans);font-size:14px;color:var(--ink);background:#fff;border:none;border-radius:999px;padding:16px 24px;outline:none;box-shadow:0 6px 18px rgba(0,0,0,.14);transition:box-shadow .2s}
.cta-form input::placeholder{color:var(--weak)}
.cta-form input:focus{box-shadow:0 0 0 3px rgba(16,30,46,.28),0 6px 18px rgba(0,0,0,.14)}
.cta-form input:nth-child(3){flex:1.35}
.cta-send{flex-shrink:0;background:#fff;color:var(--blue-d);font-family:var(--sans);font-size:15px;font-weight:800;border:none;border-radius:999px;padding:16px 34px;cursor:pointer;box-shadow:0 6px 18px rgba(0,0,0,.14);transition:all .22s}
.cta-send:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.2)}
.cta-send:active{transform:translateY(0)}
.cta-box .form-note{position:relative;z-index:1;display:block;margin-top:20px;font-size:12.5px;color:rgba(255,255,255,.75)}

/* ============ Footer ============ */
footer{background:var(--ink);padding:64px 0 0;color:#9FB2C8;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:52px}
.foot-grid h4{color:#fff;font-size:14.5px;margin-bottom:18px;font-weight:700}
.foot-grid li{margin-bottom:10px}
.foot-grid a:hover{color:#fff}
.foot-brand .brand{margin-bottom:16px}
.foot-brand .brand .name{color:#fff}
.foot-brand p{font-size:13.5px;max-width:300px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12.5px;color:#5B7A9E}
.foot-bottom a:hover{color:#fff}

/* ============ 浮动咨询 ============ */
.float-consult{position:fixed;right:22px;bottom:24px;z-index:90;display:flex;flex-direction:column;gap:10px}
.float-consult a{width:52px;height:52px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 26px rgba(47,111,237,.4);transition:all .25s}
.float-consult a:hover{background:var(--blue-d);transform:translateY(-3px)}

/* ============ 动效 ============ */
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:none}}
.hero .copy>*{animation:fadeUp .8s cubic-bezier(.22,1,.36,1) both}
.hero .copy>.h1{animation-delay:.05s}.hero .copy>.sub{animation-delay:.18s}
.hero .copy>.cta{animation-delay:.3s}.hero .copy>.facts{animation-delay:.42s}
.hero .app{animation:fadeUp .9s .35s cubic-bezier(.22,1,.36,1) both}
html.js .rv{opacity:0;transform:translateY(30px)}
html.js .rv.in{opacity:1;transform:none;transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1)}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  html.js .rv{opacity:1;transform:none}
  .hero .copy>*,.hero .app{animation:none}
  .cube{animation:none}.marquee .track{animation:none;flex-wrap:wrap}
}


/* ============ 图文服务卡 / 知识缩略卡 / 留言表单 ============ */
.cases-head.center-head{display:flex;flex-direction:column;align-items:center;gap:0;text-align:center;margin-left:auto;margin-right:auto}
.center-head .head-sub{margin-top:16px;font-size:15.5px;color:var(--text);max-width:520px}
.center-head .drag-hint{display:none}
.head-sub{font-size:15.5px;color:var(--text)}
.svc-cards{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.svc-card2{background:var(--paper);border:1px solid var(--line);border-radius:20px;overflow:hidden;transition:all .3s;display:block}
.svc-card2:hover{transform:translateY(-5px);box-shadow:0 22px 50px rgba(15,36,64,.13);border-color:var(--sky-d,#C9DDF6)}
.svc-card2 img{width:100%;aspect-ratio:16/8.5;object-fit:cover;display:block}
.svc-card2 .body{padding:24px 28px 30px}
.svc-card2 h3{font-size:18.5px;margin-bottom:8px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.svc-card2 .hot{font-family:var(--mono);font-size:10.5px;color:#fff;background:var(--blue);padding:2px 10px;border-radius:999px;letter-spacing:.1em}
.svc-card2 p{font-size:13.5px;margin-bottom:12px}
.svc-card2 .more{font-size:13px;font-weight:700;color:var(--blue)}
.post-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card2{background:var(--paper);border:1px solid var(--line);border-radius:20px;overflow:hidden;transition:all .3s;display:block}
.post-card2:hover{transform:translateY(-5px);box-shadow:0 22px 50px rgba(15,36,64,.13);border-color:var(--sky-d,#C9DDF6)}
.post-card2 img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}
.post-card2 .body{padding:22px 24px 26px}
.post-card2 .date{font-size:12px;color:var(--weak);letter-spacing:.08em}
.post-card2 h3{font-size:15px;line-height:1.6;margin:10px 0 16px}
.post-card2 .more{font-size:12.5px;font-weight:700;color:var(--blue)}

/* ============ 响应式 ============ */

/* ============ 桌面导航下拉：服务宽屏面板 + 知识二级菜单 ============ */
.nav-item{position:relative}
.nav-item.has-mega{position:static}
.droplink{display:inline-flex;align-items:center;gap:5px}
.droplink svg{transition:transform .22s}
.nav-item:hover .droplink svg{transform:rotate(180deg)}
.mega{position:absolute;left:0;right:0;top:100%;background:linear-gradient(180deg,#fbfdff 0%,var(--paper) 120px);border-bottom:1px solid var(--line);box-shadow:0 40px 80px rgba(15,36,64,.14);padding:30px 0 34px;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .26s cubic-bezier(.22,.61,.36,1);z-index:99}
.mega::before{content:'';position:absolute;left:0;right:0;top:-16px;height:16px}
.mega::before,.sub::before{pointer-events:none}
.has-mega:hover .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-in{max-width:1200px;margin:0 auto;padding:0 26px;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.mega-card{display:block;padding:10px 10px 14px;border-radius:14px;border:1px solid transparent;transition:all .22s;background:transparent}
.mega-card:hover{background:#fff;border-color:var(--line);box-shadow:0 18px 44px rgba(15,36,64,.12);transform:translateY(-4px)}
.mega-thumb{display:block;aspect-ratio:16/10;border-radius:10px;overflow:hidden;background:linear-gradient(135deg,#e9eff6,#d8e4f0);margin-bottom:12px;box-shadow:0 6px 18px rgba(15,36,64,.08)}
.mega-thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}
.mega-card:hover .mega-thumb img{transform:scale(1.05)}
.mega-card b{display:block;color:var(--ink);font-size:15px;font-weight:700;letter-spacing:.01em}
.mega-card .d{display:block;margin-top:6px;color:var(--weak);font-size:12.5px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sub{position:absolute;left:0;top:100%;width:200px;background:var(--paper);border:1px solid var(--line);border-radius:12px;box-shadow:0 24px 48px rgba(15,36,64,.16);padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .22s;z-index:99}
.sub::before{content:'';position:absolute;left:0;right:0;top:-14px;height:14px}
.has-sub:hover .sub{opacity:1;visibility:visible;transform:translateY(0)}
.sub a{display:block;padding:10px 14px;border-radius:8px;font-size:14px;font-weight:600;color:var(--text)}
.sub a:hover{background:var(--ice);color:var(--ink)}
.mobile-menu .sublink{padding-left:30px;font-size:13.5px;color:var(--weak)}

@media (max-width:1024px){
  .hero .wrap{grid-template-columns:1fr;gap:56px}
  .hero{padding-top:56px}
  .why-grid{grid-template-columns:1fr;gap:44px}
  .flow-band{grid-template-columns:repeat(2,1fr)}
  .flow-step:nth-child(3){border-left:none}
  .flow-step:nth-child(n+3){border-top:1px solid var(--line)}
}
@media (max-width:768px){
  section{padding:72px 0}
  .nav-links,.nav-cta{display:none}
  .hamburger{display:block}
  .mobile-menu{display:block;max-height:0;overflow:hidden;transition:max-height .35s ease;border-top:1px solid var(--line)}
  .mobile-menu.open{max-height:400px}
  .mobile-menu a{display:block;padding:14px 8px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--mist,#F3F7FC)}
  .app-body{grid-template-columns:1fr}
  .rail{flex-direction:row;flex-wrap:wrap;border-right:none;border-bottom:1px solid var(--line);gap:22px}
  .rail .grp{flex:1;min-width:130px}
  .vs-cols{grid-template-columns:1fr}
  .svc-row{grid-template-columns:1fr;gap:10px;padding:28px 12px}
  .svc-row .arrow{display:none}
  .flow-band{grid-template-columns:1fr}
  .flow-step{border-left:none;border-top:1px solid var(--line)}
  .flow-step:first-child{border-top:none}
  .case{flex-basis:290px}
  .svc-cards,.post-cards{grid-template-columns:1fr}
  .cta-box{padding:56px 24px 44px;border-radius:20px}
  .cta-form{flex-direction:column;gap:11px;margin-top:34px}
  .cta-form input{width:100%}
  .cta-send{width:100%}
  .sec-cta{padding:84px 0}
  .float-consult{right:14px;bottom:16px}
  /* --- 移动端修补 --- */
  .nav-row{gap:14px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px 22px;padding-bottom:40px}
  .foot-brand{grid-column:1/-1}
  .foot-bottom{flex-direction:column;align-items:center;text-align:center;gap:8px}
  .mobile-menu.open{max-height:600px}
  .mobile-menu a{padding:13px 8px;font-size:15px}
  .hero h1{font-size:clamp(31px,8.6vw,44px)}
  .hero .facts{gap:22px;margin-top:34px}
  .cases-head{margin-bottom:32px}
  .lang-switch{margin-left:auto;flex-shrink:0}
}
@media (max-width:420px){
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .app-top{padding:11px 14px}
  .case{flex-basis:260px}
  .btn-blue{padding:13px 24px;font-size:14px}
}
.brand .mark{background:none!important;padding:0!important;border-radius:0}
/* 手机菜单：可折叠子栏目 */
.mobile-menu .m-drop{position:relative}
.mobile-menu .m-drop::after{content:'+';position:absolute;right:10px;top:50%;transform:translateY(-50%);font-size:18px;color:var(--weak);font-weight:400}
.mobile-menu .m-drop.open::after{content:'\2212'}
.mobile-menu .sublink{display:none}
.mobile-menu .sublink.show{display:block}

/* ============ 服务单页（lists_single_*） ============ */
.page-hero{padding:64px 0 80px;background:
  radial-gradient(900px 480px at 88% -18%,var(--sky) 0%,transparent 58%),
  linear-gradient(180deg,#F3F8FE 0%,var(--paper) 100%)}
.page-hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.page-hero .crumb{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--blue);margin-bottom:14px}
.page-hero .lead{font-size:16px;line-height:1.8;color:var(--text);margin:18px 0 28px;max-width:34em}
.btn-row{display:flex;gap:14px;flex-wrap:wrap}
.btn-main{display:inline-block;background:var(--blue);color:#fff;font-size:14.5px;font-weight:700;padding:13px 30px;border-radius:999px;transition:all .25s;box-shadow:0 10px 24px rgba(47,111,237,.25)}
.btn-main:hover{background:var(--blue-d);transform:translateY(-2px)}
.btn-ghost{display:inline-block;border:1px solid var(--line);color:var(--text);font-size:14.5px;font-weight:600;padding:12px 26px;border-radius:999px;transition:all .25s}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.page-hero .pic img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:20px;box-shadow:0 30px 70px rgba(15,36,64,.16)}
.page-feats{padding:88px 0;background:var(--paper)}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feat-card{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:26px 22px;transition:all .25s}
.feat-card:hover{transform:translateY(-4px);box-shadow:0 20px 44px rgba(15,36,64,.12);border-color:transparent}
.feat-ico{display:inline-flex;width:40px;height:40px;border-radius:12px;background:var(--ice);color:var(--blue);align-items:center;justify-content:center;margin-bottom:14px}
.feat-card b{display:block;font-size:15.5px;color:var(--ink);margin-bottom:8px}
.feat-card p{font-size:13px;line-height:1.7;color:var(--weak)}
.page-body{padding:20px 0 40px}
.page-prose{max-width:860px;margin:0 auto;font-size:15px;line-height:1.9;color:var(--text)}
.page-prose h1,.page-prose h2,.page-prose h3{color:var(--ink);line-height:1.4;margin:1.6em 0 .6em}
.page-prose h2{font-size:22px;border-left:4px solid var(--blue);padding-left:14px}
.page-prose h3{font-size:17px}
.page-prose img{max-width:100%;border-radius:12px;margin:1em 0}
.page-prose ul,.page-prose ol{padding-left:1.4em;margin:.8em 0}
.page-prose li{margin:.4em 0}
.page-prose p{margin:.9em 0}
.page-flow{padding:80px 0;background:var(--ice)}
@media (max-width:1024px){
  .page-hero-grid{grid-template-columns:1fr;gap:40px}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .feat-grid{grid-template-columns:1fr}
  .page-hero{padding:44px 0 60px}
}

/* 单页 SEO 内容区 + FAQ */
.seo-block{padding:10px 0 60px}
.seo-copy{max-width:860px;margin:0 auto}
.seo-copy h2{font-size:24px;color:var(--ink);margin-bottom:20px;padding-left:14px;border-left:4px solid var(--blue)}
.seo-copy p{font-size:14.5px;line-height:2;color:var(--text);margin:14px 0}
.kw-tags{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px}
.kw-tags span{font-size:12.5px;color:var(--blue);background:var(--ice);padding:7px 14px;border-radius:999px}
.page-faq{padding:80px 0;background:var(--ice)}
@media (max-width:640px){ .seo-copy h2{font-size:20px} }

/* 单页：统计条 / 服务网格 / VS 对比 / 案例 / 诊断 / 小程序 */
.page-stats{padding:44px 0;background:var(--deep)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat b{display:block;font-family:var(--mono);font-size:34px;color:#fff;font-weight:700}
.stat b i{font-style:normal;font-size:18px;color:var(--sky);margin-left:2px}
.stat span{display:block;margin-top:6px;font-size:13px;color:#B9CBE3;letter-spacing:.06em}
.page-sec{padding:80px 0}
.feat-grid.three{grid-template-columns:repeat(3,1fr)}
.vs-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:960px;margin:0 auto}
.vs-col{border-radius:18px;padding:28px 30px}
.vs-col.good{background:linear-gradient(180deg,#F0F7EF,#fff);border:1px solid #CDE6CC}
.vs-col.bad{background:linear-gradient(180deg,#FBF1F0,#fff);border:1px solid #F0D2CF}
.vs-tt{font-size:17px;font-weight:800;color:var(--ink);margin-bottom:16px;padding-bottom:12px;border-bottom:1px dashed rgba(15,36,64,.15)}
.vs-col.good .vs-tt{color:#1E7B34}
.vs-col.bad .vs-tt{color:#B4362C}
.vs-col ul{list-style:none;margin:0;padding:0}
.vs-col li{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;line-height:1.7;color:var(--text);padding:7px 0}
.vs-col.good li:before{content:'';flex-shrink:0;width:18px;height:18px;border-radius:50%;background:#1E7B34;margin-top:2px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");background-size:11px;background-position:center;background-repeat:no-repeat}
.vs-col.bad li:before{content:'';flex-shrink:0;width:18px;height:18px;border-radius:50%;background:#B4362C;margin-top:2px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round'%3E%3Cpath d='M18 6L6 18M6 6l12 12'/%3E%3C/svg%3E");background-size:10px;background-position:center;background-repeat:no-repeat}
.page-cases{padding:80px 0;background:var(--ice)}
.work-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.work-card{display:block;background:var(--paper);border-radius:14px;overflow:hidden;border:1px solid var(--line);transition:all .25s}
.work-card:hover{transform:translateY(-4px);box-shadow:0 20px 44px rgba(15,36,64,.12)}
.work-thumb{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--ice)}
.work-thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}
.work-card:hover .work-thumb img{transform:scale(1.05)}
.work-card b{display:block;padding:14px 18px 16px;font-size:14.5px;color:var(--ink);line-height:1.5;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.btn-row.center{justify-content:center;margin-top:34px}
.diag-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;max-width:960px;margin:0 auto}
.diag-list{list-style:none;margin:0;padding:0}
.diag-list li{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;line-height:1.75;color:var(--text);padding:8px 0;border-bottom:1px dashed var(--line)}
.diag-list li:before{content:'';flex-shrink:0;width:18px;height:18px;border-radius:50%;background:var(--blue);margin-top:2px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");background-size:11px;background-position:center;background-repeat:no-repeat}
.diag-pic img{width:100%;border-radius:18px;box-shadow:0 24px 60px rgba(15,36,64,.14)}
.xcx-intro{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:center;max-width:980px;margin:0 auto}
.xcx-pic img{width:100%;border-radius:18px;box-shadow:0 24px 60px rgba(15,36,64,.14)}
.xcx-copy p{font-size:14.5px;line-height:2;color:var(--text);margin:12px 0}
.xcx-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;max-width:980px;margin:0 auto}
.xcx-col{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:28px 30px}
.xcx-col .vs-tt{border-bottom:none;padding-bottom:0;margin-bottom:12px}
.get-list{list-style:none;margin:0;padding:0}
.get-list li{padding:9px 0;border-bottom:1px dashed var(--line)}
.get-list li b{display:block;font-size:14px;color:var(--ink);margin-bottom:3px}
.get-list li span{font-size:12.5px;color:var(--weak);line-height:1.65}
.scene-tags{margin-top:18px;display:flex;flex-wrap:wrap;gap:8px;font-size:12.5px;color:var(--blue)}
.scene-tags span,.scene-tags{word-break:break-all}
.adv-list{list-style:none;margin:0;padding:0}
.adv-list li{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;line-height:1.75;color:var(--text);padding:7px 0}
.adv-list li:before{content:'';flex-shrink:0;width:18px;height:18px;border-radius:50%;background:#1E7B34;margin-top:2px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");background-size:11px;background-position:center;background-repeat:no-repeat}
@media (max-width:1024px){
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .feat-grid.three{grid-template-columns:repeat(2,1fr)}
  .vs-grid{grid-template-columns:1fr}
  .work-grid{grid-template-columns:repeat(2,1fr)}
  .diag-grid,.xcx-intro,.xcx-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .feat-grid.three{grid-template-columns:1fr}
  .work-grid{grid-template-columns:1fr}
  .stat b{font-size:26px}
}

/* ============ 内页体系（列表/详情/留言/FAQ） ============ */
.page-hero-slim{padding:52px 0 46px}
.page-hero-slim .h1{font-size:30px}
.page-hero-slim .lead{font-size:14.5px;margin-top:12px}
.page-hero-slim .crumb{margin-bottom:10px}
.screen-box{border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin-bottom:26px}
.screen-row{display:flex;gap:14px;padding:6px 0;align-items:baseline}
.screen-tt{flex-shrink:0;font-size:13px;font-weight:700;color:var(--ink)}
.screen-vals{display:flex;flex-wrap:wrap;gap:8px}
.screen-val{font-size:12.5px;color:var(--text);background:var(--ice);padding:5px 13px;border-radius:999px;transition:all .2s}
.screen-val:hover{color:var(--blue)}
.screen-val.active{background:var(--blue);color:#fff}
.post-list{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.post-row{display:flex;gap:20px;background:var(--paper);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:all .25s}
.post-row:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(15,36,64,.1)}
.post-thumb{flex-shrink:0;width:220px;aspect-ratio:16/10;overflow:hidden;background:var(--ice)}
.post-thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}
.post-row:hover .post-thumb img{transform:scale(1.05)}
.post-main{padding:16px 20px 14px;display:flex;flex-direction:column}
.post-main b{font-size:16px;color:var(--ink);line-height:1.5}
.post-main p{font-size:13px;color:var(--weak);line-height:1.7;margin:8px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-date{font-size:12px;color:var(--weak);font-family:var(--mono);margin-top:auto}
.pagelist-wrap{margin-top:40px;text-align:center}
.pagelist-wrap ul{display:inline-flex;gap:8px;list-style:none;padding:0;margin:0;flex-wrap:wrap;justify-content:center}
.pagelist-wrap ul li{display:inline}
.pagelist-wrap ul a,.pagelist-wrap ul span{display:inline-block;min-width:38px;padding:9px 14px;border-radius:10px;border:1px solid var(--line);background:var(--paper);font-size:13.5px;color:var(--text);transition:all .2s}
.pagelist-wrap ul a:hover{border-color:var(--blue);color:var(--blue)}
.pagelist-wrap ul span.active{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:700}
.case-detail-head h1{font-size:28px;color:var(--ink);line-height:1.4}
.case-meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}
.case-meta span{font-size:13px;color:var(--text);background:var(--ice);padding:7px 15px;border-radius:999px}
.case-link{font-size:13px;color:var(--blue);background:var(--ice);padding:7px 15px;border-radius:999px;text-decoration:underline}
.case-gallery{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:34px}
.art-title{font-size:26px;color:var(--ink);line-height:1.5}
.art-meta{display:flex;gap:18px;font-size:13px;color:var(--weak);font-family:var(--mono);margin:14px 0 26px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.art-tags{margin-top:34px}
.art-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:30px;padding-top:24px;border-top:1px solid var(--line)}
.art-nav-item{background:var(--ice);border-radius:12px;padding:14px 18px;font-size:12px;color:var(--weak)}
.art-nav-item b{display:block;margin-top:6px;font-size:13.5px;line-height:1.55;color:var(--ink)}
.art-nav-item b a{color:var(--ink)}
.art-nav-item b a:hover{color:var(--blue)}
.art-nav-item.ta-r{text-align:right}
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;align-items:start;max-width:1080px;margin:0 auto}
.contact-info,.contact-form{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:32px 34px}
.contact-info h2,.contact-form h2{font-size:20px;color:var(--ink);margin-bottom:20px}
.cinfo-list{list-style:none;margin:0;padding:0}
.cinfo-list li{padding:13px 0;border-bottom:1px dashed var(--line);font-size:14px;line-height:1.7}
.cinfo-list li b{display:block;font-size:12px;color:var(--weak);letter-spacing:.08em;margin-bottom:4px}
.cinfo-list li span,.cinfo-list li a{color:var(--text)}
.cinfo-list li a:hover{color:var(--blue)}
.cinfo-note{margin-top:20px;font-size:13px;color:var(--weak)}
@media (max-width:1024px){
  .contact-grid{grid-template-columns:1fr}
  .post-thumb{width:160px}
}
@media (max-width:640px){
  .post-row{flex-direction:column}
  .post-thumb{width:100%}
  .case-gallery{grid-template-columns:1fr}
  .art-nav{grid-template-columns:1fr}
  .screen-box{padding:12px 14px}
  .page-hero-slim .h1{font-size:24px}
}