:root{
  --ink:#22323f; --ink-2:#4a5b6a; --ink-3:#7d8fa0;
  --brand:#1e9de3; --brand-d:#1272b8; --navy:#223448;
  --line:#e2ecf4; --bg:#ffffff; --bg-2:#f3f9fd;
  --max:1080px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",
       "Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
a{color:var(--brand-d);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* header（白底 + 当前页蓝色高亮） */
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--line);backdrop-filter:saturate(1.4) blur(6px)}
.hd{display:flex;align-items:center;gap:18px;min-height:64px}
.brand{font-weight:700;font-size:19px;color:var(--brand-d);letter-spacing:.5px;
  display:flex;align-items:baseline;gap:8px;text-decoration:none}
.brand small{font-size:12px;font-weight:400;color:var(--ink-3);letter-spacing:0}
.nav{margin-left:auto;display:flex;gap:22px;flex-wrap:wrap}
.nav a{color:var(--ink-2);font-size:15px;text-decoration:none;white-space:nowrap;
  padding:6px 2px;border-bottom:2px solid transparent;transition:color .15s,border-color .15s}
.nav a:hover{color:var(--brand-d)}
.nav a.on{color:var(--brand-d);font-weight:600;border-bottom-color:var(--brand)}
.tel{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:999px;
  background:linear-gradient(120deg,var(--brand),var(--brand-d));color:#fff;font-weight:600;
  font-size:15px;white-space:nowrap;text-decoration:none;box-shadow:0 4px 14px rgba(30,157,227,.3)}
.tel:hover{text-decoration:none;filter:brightness(1.06)}

/* hero（浅色大图 + 白色渐变 + 居中深字） */
.hero{position:relative;color:var(--ink);padding:130px 0 100px;text-align:center;overflow:hidden;
  background:#dceefa}
.hero-bg{position:absolute;inset:0;
  background:url('../img/hero_light_wide.webp?v=04348d') center/cover no-repeat}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(255,255,255,.94) 0%,rgba(255,255,255,.72) 40%,
             rgba(255,255,255,.34) 72%,rgba(255,255,255,.12) 100%)}
.hero .wrap{position:relative;z-index:2}
.hero h1{margin:0 0 16px;font-size:38px;line-height:1.3;font-weight:700;color:#153d5c;
  letter-spacing:1px}
.hero .hero-tag{display:inline-block;margin-bottom:14px;padding:5px 16px;border-radius:999px;
  background:rgba(30,157,227,.12);color:var(--brand-d);font-size:14px;font-weight:600;
  letter-spacing:2px}
.hero p{margin:0 auto;max-width:660px;color:#42586b;font-size:16.5px}
.hero .cta{margin-top:28px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 26px;border-radius:999px;font-weight:600;
  text-decoration:none;font-size:15px;transition:transform .15s,box-shadow .15s,background .15s}
.btn-p{background:linear-gradient(120deg,var(--brand),var(--brand-d));color:#fff;
  box-shadow:0 8px 22px rgba(30,157,227,.36)}
.btn-p:hover{filter:brightness(1.06);text-decoration:none;transform:translateY(-1px)}
.btn-g{border:1.5px solid rgba(21,61,92,.35);color:#153d5c;background:rgba(255,255,255,.65);
  backdrop-filter:blur(4px)}
.btn-g:hover{background:#fff;text-decoration:none;border-color:var(--brand);color:var(--brand-d)}

/* 子页横幅（浅图 + 天蓝渐变遮罩 + 白字） */
.page-hero{position:relative;color:#fff;background:#1272b8;overflow:hidden;padding:70px 0 58px}
.page-hero .ph-bg{position:absolute;inset:0;
  background-position:center;background-size:cover;transform:scale(1.02)}
.ph-hero_light{background-image:url('../img/hero_light_wide.webp?v=04348d')}
.ph-srv_anfang{background-image:url('../img/srv_anfang_wide.webp?v=04348d')}
.ph-srv_menjin{background-image:url('../img/srv_menjin_wide.webp?v=04348d')}
.ph-srv_chepai{background-image:url('../img/srv_chepai_wide.webp?v=04348d')}
.ph-srv_buxian{background-image:url('../img/srv_buxian_wide.webp?v=04348d')}
.ph-srv_jifang{background-image:url('../img/srv_jifang_wide.webp?v=04348d')}
.ph-srv_zhihui{background-image:url('../img/srv_zhihui_wide.webp?v=04348d')}
.page-hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(96deg,rgba(13,86,140,.90) 0%,rgba(20,120,190,.66) 48%,
             rgba(30,157,227,.32) 100%)}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{margin:0 0 10px;font-size:30px;line-height:1.35;font-weight:700;
  text-shadow:0 2px 14px rgba(9,50,80,.4)}
.page-hero p{margin:0;max-width:720px;color:#eaf5fd;font-size:16px}

/* stats 数字实力墙（白卡压在 hero 下缘） */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
  margin:-58px 0 0;position:relative;z-index:5}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px 18px;
  text-align:center;box-shadow:0 12px 32px rgba(18,90,150,.10)}
.stat b{display:block;font-size:34px;line-height:1.15;color:var(--brand-d);font-weight:700}
.stat span{display:block;margin-top:6px;font-size:13px;color:var(--ink-3)}
.stat::after{content:"";display:block;width:26px;height:3px;border-radius:2px;
  background:var(--brand);margin:12px auto 0;opacity:.85}

/* section（alt 区浅蓝渐变 + 圆弧装饰） */
section{padding:56px 0;position:relative}
section.alt{background:linear-gradient(180deg,#f3f9fd 0%,#e9f4fc 100%);overflow:hidden}
section.alt::before{content:"";position:absolute;right:-140px;top:-140px;width:420px;height:420px;
  border-radius:50%;background:radial-gradient(circle,rgba(30,157,227,.10),transparent 68%);
  pointer-events:none}
section .wrap{position:relative;z-index:1}
/* 居中板块标题（普通字 + 加粗关键字） */
.sec-head{text-align:center;margin-bottom:36px}
.sec-head h2{font-size:28px;font-weight:400;letter-spacing:1px;margin:0 0 8px;color:#2c4358}
.sec-head h2 b{font-weight:700;color:#1d3349}
.sec-head .sec-sub{color:var(--ink-3);margin:0;font-size:15px;text-align:center}
h2{font-size:24px;line-height:1.4;margin:0 0 8px;letter-spacing:.3px}
h2+h3{margin-top:0}
h3{font-size:18px;margin:34px 0 8px}
h4{font-size:16px;margin:22px 0 6px}
p{margin:0 0 14px}
ul{margin:0 0 16px;padding-left:20px}
li{margin:0 0 8px}
.muted{color:var(--ink-3);font-size:14px}

/* cards（白卡 + 圆角 + 封面图） */
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{border:1px solid var(--line);border-radius:14px;padding:24px;background:#fff;
  transition:border-color .18s,box-shadow .18s,transform .18s;overflow:hidden}
.card:hover{border-color:#b5dcf5;box-shadow:0 14px 34px rgba(18,110,170,.14);transform:translateY(-3px)}
.svc-cover{margin:-24px -24px 16px;aspect-ratio:768/400;overflow:hidden;position:relative;
  background:#eaf4fb}
.svc-cover img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s ease}
.card:hover .svc-cover img{transform:scale(1.05)}
.card h3{margin:0 0 8px;font-size:17px}
.card h3 a{color:var(--ink);text-decoration:none}
.card h3 a:hover{color:var(--brand-d)}
.card p{margin:0;font-size:14.5px;color:var(--ink-2)}
.card .more{display:inline-block;margin-top:12px;font-size:14px;color:var(--brand-d)}
.tag{display:inline-block;padding:2px 10px;border-radius:999px;background:#e8f4fc;
  color:var(--brand-d);font-size:12px;margin:0 6px 6px 0}

/* feature 放射标注板块（中图 + 两侧标注线） */
.feature{display:grid;grid-template-columns:1fr 460px 1fr;align-items:center;gap:6px;
  margin-top:8px}
.fcol{display:flex;flex-direction:column;gap:40px}
.fitem{display:flex;align-items:center;gap:0;min-height:28px}
.fitem .txt{font-size:14.5px;color:var(--ink);white-space:nowrap}
.fitem .dot{width:12px;height:12px;border-radius:50%;background:var(--brand);flex:0 0 auto;
  box-shadow:0 0 0 4px rgba(30,157,227,.16)}
.fitem .line{flex:1;height:1.5px;background:linear-gradient(90deg,transparent,#8fd0f5)}
.fcol.left .fitem{flex-direction:row-reverse;text-align:right}
.fcol.left .fitem .line{background:linear-gradient(270deg,transparent,#8fd0f5)}
.fcol.left .fitem .txt{margin-right:0}
.fimg{background:radial-gradient(circle at 50% 38%,#d9effd 0%,#f2faff 72%);
  border-radius:50%;padding:34px;text-align:center;
  box-shadow:0 18px 44px rgba(18,110,170,.12)}
.fimg img{width:100%;max-width:340px;height:auto;display:block;
  mix-blend-mode:multiply}

/* 案例图卡 */
.case{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;
  transition:box-shadow .18s,transform .18s,border-color .18s}
.case:hover{box-shadow:0 14px 34px rgba(18,110,170,.14);transform:translateY(-3px);
  border-color:#b5dcf5}
.case img{width:100%;aspect-ratio:768/400;object-fit:cover;display:block}
.case .cb{padding:20px 22px}
.case h3{margin:0 0 6px;font-size:17.5px}
.case .scale{color:var(--brand-d);font-size:13px;margin:0 0 8px}
.case p{margin:0;font-size:14.5px;color:var(--ink-2)}

/* article body */
.article{max-width:820px}
.article h2{border-left:3px solid var(--brand);padding-left:12px;margin-top:40px}
.article h3{margin-top:26px}
.crumb{font-size:13px;color:var(--ink-3);padding:16px 0 0}
.crumb a{color:var(--ink-3)}

/* faq */
.faq{border-top:1px solid var(--line)}
.qa{padding:20px 0;border-bottom:1px solid var(--line)}
.qa h3{margin:0 0 8px;font-size:16.5px;color:var(--ink)}
.qa p{margin:0;color:var(--ink-2);font-size:15px}

/* process */
.steps{counter-reset:s;display:grid;gap:14px;grid-template-columns:repeat(5,1fr)}
.step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}
.step::before{counter-increment:s;content:counter(s);display:inline-flex;
  width:26px;height:26px;align-items:center;justify-content:center;border-radius:50%;
  background:linear-gradient(120deg,var(--brand),var(--brand-d));color:#fff;
  font-size:13px;font-weight:700;margin-bottom:8px}
.step b{display:block;font-size:15px;margin-bottom:4px}
.step span{font-size:13.5px;color:var(--ink-2)}

/* 询价表单 */
.form{background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px;
  box-shadow:0 14px 36px rgba(18,110,170,.10)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form label{display:block;font-size:13.5px;color:var(--ink-2);margin:0 0 6px}
.form label i{color:#e05656;font-style:normal;margin-left:2px}
.form input,.form select,.form textarea{
  width:100%;padding:12px 14px;border:1px solid #cfe0ee;border-radius:10px;
  font:inherit;font-size:15px;color:var(--ink);background:#fbfdff;
  transition:border-color .15s,box-shadow .15s}
.form input:focus,.form select:focus,.form textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(30,157,227,.15)}
.form textarea{min-height:110px;resize:vertical}
.form .fld{margin-bottom:16px}
.form-ok{text-align:center;padding:46px 22px;background:linear-gradient(180deg,#f2fbf7 0%,#fff 100%);
  border:1px solid #d9f0e5;border-radius:18px}
.ok-ico{width:66px;height:66px;margin:0 auto 18px;border-radius:50%;background:#12a06a;color:#fff;
  font-size:34px;line-height:66px;font-weight:700;box-shadow:0 10px 24px rgba(18,160,106,.26)}
.form-ok h3{font-size:22px;color:#0e6b48;margin-bottom:10px}
.form-ok p{color:#4a6a86;font-size:14px;margin-bottom:6px}
.form-ok .ok-tip{font-size:13px;color:#8aa3b8;margin-top:4px}
.form-ok .btn{margin-top:18px;border:0;cursor:pointer}
.btn-block{display:block;width:100%}
.form-msg{margin-top:14px;font-size:14px;display:none;padding:10px 14px;border-radius:10px}
.form-msg.ok{display:block;background:#e9f8ef;color:#1d7a3e;border:1px solid #bfe8cd}
.form-msg.err{display:block;background:#fdeeee;color:#b23434;border:1px solid #f2c9c9}

/* cta band（天蓝渐变圆角居中卡） */
.band{padding:10px 20px 64px;background:transparent}
.band .wrap{background:linear-gradient(120deg,#1e9de3 0%,#1272b8 100%);border-radius:20px;
  padding:46px 40px;color:#fff;text-align:center;position:relative;overflow:hidden;
  box-shadow:0 18px 44px rgba(18,110,170,.28)}
.band .wrap::before{content:"";position:absolute;left:-90px;bottom:-120px;width:300px;height:300px;
  border-radius:50%;background:rgba(255,255,255,.08);pointer-events:none}
.band .wrap::after{content:"";position:absolute;right:-60px;top:-110px;width:260px;height:260px;
  border-radius:50%;background:rgba(255,255,255,.08);pointer-events:none}
.band h2{color:#fff;margin-bottom:8px;position:relative;z-index:1}
.band p{color:#e3f3fd;margin:0 0 20px;position:relative;z-index:1}
.band .cta{position:relative;z-index:1;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.band .btn-p{background:#fff;color:var(--brand-d);box-shadow:0 8px 22px rgba(9,50,80,.25)}
.band .btn-p:hover{filter:none;background:#f2faff}
.band .btn-g{border-color:rgba(255,255,255,.6);color:#fff;background:rgba(255,255,255,.1)}
.band .btn-g:hover{background:rgba(255,255,255,.2)}

/* footer（深藏青） */
footer{background:var(--navy);color:#a9bccb;padding:48px 0 28px;font-size:14px}
footer a{color:#d3e4f0}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
footer b{color:#fff;font-size:15px;display:block;margin-bottom:10px}
footer p{margin:0 0 8px}
.fnav a{display:inline-block;margin:0 0 8px}
.copy{border-top:1px solid #33465c;margin-top:28px;padding-top:18px;
  color:#7c93a6;font-size:12.5px}

/* responsive */
@media(max-width:960px){
  .feature{grid-template-columns:1fr;gap:22px}
  .fimg{order:-1;margin:0 auto}
  .fcol{flex-direction:row;display:grid;grid-template-columns:1fr 1fr;gap:14px}
  .fitem{flex-direction:row !important;text-align:left !important;gap:10px}
  .fitem .line{display:none}
  .fitem .dot{margin-right:8px}
  .fcol.left .fitem .dot{margin-right:8px}
}
@media(max-width:860px){
  .hero{padding:84px 0 70px}
  .hero h1{font-size:27px}
  .page-hero{padding:44px 0 38px}
  .page-hero h1{font-size:24px}
  .stats{grid-template-columns:repeat(2,1fr);margin-top:-30px;gap:12px}
  .g3,.g2,.split{grid-template-columns:1fr !important}
  .steps{grid-template-columns:1fr 1fr}
  .fgrid{grid-template-columns:1fr;gap:22px}
  .nav{gap:14px;font-size:14px}
  .hd{flex-wrap:wrap;padding:10px 0;gap:10px}
  .nav{margin-left:0;order:3;width:100%}
  .tel{margin-left:auto}
  section{padding:38px 0}
  .sec-head h2{font-size:22px}
  .form .row{grid-template-columns:1fr}
  .band .wrap{padding:34px 22px}
}