/* ===== 基础变量 ===== */
:root{
  --navy:#0B2A5B;        /* 主深蓝 */
  --navy-2:#13357a;
  --navy-deep:#071d3f;
  --gold:#E8B84B;        /* 金企云金 */
  --gold-2:#C8881E;
  --gold-light:#F5D98B;
  --ink:#1a2233;
  --ink-soft:#56607a;
  --line:#e7ebf3;
  --bg:#f6f8fc;
  --bg-2:#eef2f9;
  --white:#ffffff;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(11,42,91,.10);
  --shadow-lg:0 20px 50px rgba(11,42,91,.16);
  --maxw:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--white);line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.grad-text{
  background:linear-gradient(92deg,var(--gold) 20%,var(--gold-light) 60%,#fff 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ===== 通用按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:50px;font-size:15px;font-weight:600;
  cursor:pointer;border:none;transition:.25s;letter-spacing:.5px;white-space:nowrap}
.btn-sm{padding:10px 22px;font-size:14px}
.btn-block{width:100%}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-2));color:var(--navy-deep);box-shadow:0 8px 20px rgba(200,136,30,.32)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(200,136,30,.42)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.5);backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy-2);transform:translateY(-2px)}

/* ===== 顶部公告条 ===== */
.topbar{background:var(--navy-deep);color:rgba(255,255,255,.78);font-size:12.5px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;height:38px;gap:12px}
.topbar-tip{display:inline-flex;align-items:center;gap:6px}
.topbar-tip svg{opacity:.85}
.topbar-contact{opacity:.8}

/* ===== 导航 ===== */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:.3s}
.header.scrolled{box-shadow:0 6px 20px rgba(11,42,91,.08)}
.nav-inner{display:flex;align-items:center;height:72px;gap:24px}
.logo{display:flex;align-items:center;gap:11px}
.logo-img{height:42px;width:auto;display:block;filter:drop-shadow(0 3px 6px rgba(200,136,30,.2))}
.nav-menu{display:flex;gap:6px;margin-left:auto;align-items:center}
.nav-link{padding:8px 14px;font-size:15px;color:var(--ink-soft);border-radius:8px;
  font-weight:500;transition:.2s;position:relative}
.nav-link:hover{color:var(--navy);background:var(--bg)}
.nav-link.active{color:var(--navy);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:linear-gradient(90deg,var(--gold),var(--gold-2));border-radius:2px}
.nav-cta{margin-left:8px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;margin-left:auto}
.nav-toggle span{width:24px;height:2.5px;background:var(--navy);border-radius:2px;transition:.3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{position:relative;min-height:92vh;display:flex;align-items:center;
  background:linear-gradient(135deg,var(--navy-deep) 0%,var(--navy) 55%,var(--navy-2) 100%);
  overflow:hidden;color:#fff;padding:120px 0 80px}
.hero-bg{position:absolute;inset:0;
  background:radial-gradient(circle at 80% 20%,rgba(232,184,75,.22),transparent 45%),
             radial-gradient(circle at 15% 85%,rgba(59,130,246,.18),transparent 40%)}
.hero-grid{position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:54px 54px;
  mask-image:radial-gradient(ellipse at 50% 40%,#000 30%,transparent 75%)}
.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;padding:7px 16px;border-radius:50px;
  background:rgba(232,184,75,.16);border:1px solid rgba(232,184,75,.4);
  color:var(--gold-light);font-size:13px;font-weight:600;letter-spacing:1px;margin-bottom:22px}
.hero-title{font-size:clamp(34px,5vw,60px);line-height:1.18;font-weight:800;letter-spacing:1px;margin-bottom:22px}
.hero-desc{font-size:17px;color:rgba(255,255,255,.82);max-width:560px;margin-bottom:32px;line-height:1.85}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:40px}
.hero-partner span{font-size:13px;color:rgba(255,255,255,.55);letter-spacing:1px}
.partner-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.chip{padding:5px 13px;border-radius:50px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  font-size:12.5px;color:rgba(255,255,255,.85)}
.hero-visual{position:relative;height:420px}
.hero-orb{position:absolute;width:300px;height:300px;border-radius:50%;right:10%;top:12%;
  background:radial-gradient(circle at 35% 35%,rgba(232,184,75,.55),rgba(232,184,75,.05) 70%);
  filter:blur(2px);animation:float 6s ease-in-out infinite}
.hero-ring{position:absolute;width:380px;height:380px;border-radius:50%;right:-2%;top:8%;
  border:1.5px dashed rgba(232,184,75,.35);animation:spin 40s linear infinite}
.float-card{position:absolute;background:rgba(255,255,255,.97);border-radius:14px;padding:16px 20px;
  display:flex;align-items:center;gap:13px;box-shadow:var(--shadow-lg);color:var(--ink);
  animation:float 5s ease-in-out infinite}
.float-card strong{display:block;font-size:15px;color:var(--navy)}
.float-card small{font-size:12px;color:var(--ink-soft)}
.card-1{top:18%;left:0;animation-delay:0s}
.card-2{bottom:14%;right:6%;animation-delay:1.5s}
.scroll-hint{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);width:26px;height:44px;
  border:2px solid rgba(255,255,255,.4);border-radius:14px;display:flex;justify-content:center;padding-top:8px}
.scroll-hint span{width:4px;height:9px;background:var(--gold);border-radius:2px;animation:scrolldot 1.6s infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes scrolldot{0%{opacity:0;transform:translateY(-4px)}50%{opacity:1}100%{opacity:0;transform:translateY(10px)}}

/* ===== 数据统计 ===== */
.stats{background:linear-gradient(135deg,var(--navy),var(--navy-2));padding:56px 0;position:relative}
.stats::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 90% 50%,rgba(232,184,75,.18),transparent 50%)}
.stats-grid{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-num{font-size:clamp(34px,4vw,50px);font-weight:800;color:var(--gold-light);line-height:1}
.stat-num .count{display:inline}
.stat-label{margin-top:10px;color:rgba(255,255,255,.78);font-size:15px;letter-spacing:1px}

/* ===== 通用 section head ===== */
.section-head{text-align:center;max-width:680px;margin:0 auto 56px}
.section-tag{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--gold-2);
  background:rgba(232,184,75,.12);padding:5px 14px;border-radius:50px;margin-bottom:14px}
.section-title{font-size:clamp(26px,3.2vw,38px);font-weight:800;color:var(--navy);letter-spacing:1px}
.section-sub{margin-top:14px;color:var(--ink-soft);font-size:16px}
.section-title.light{color:#fff}
.section-sub.light{color:rgba(255,255,255,.7)}

/* ===== 关于我们 ===== */
.about{background:var(--white)}
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.about-text p{color:var(--ink-soft);font-size:16px;margin-bottom:18px}
.about-text strong{color:var(--navy)}
.about-points{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:26px 0 30px}
.about-points li{display:flex;align-items:center;gap:9px;font-size:15px;color:var(--ink);font-weight:500}
.about-vision{display:flex;flex-direction:column;gap:18px}
.vision-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;
  display:flex;align-items:flex-start;gap:18px;transition:.3s}
.vision-card:hover{background:#fff;box-shadow:var(--shadow);transform:translateX(6px)}
.vision-icon{flex:0 0 auto;width:50px;height:50px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--navy),var(--navy-2));color:var(--gold)}
.vision-card h3{font-size:18px;color:var(--navy);margin-bottom:4px}
.vision-card p{color:var(--ink-soft);font-size:14.5px}

/* ===== 核心服务 ===== */
.services{background:var(--bg)}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.service-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;
  transition:.3s;position:relative;overflow:hidden}
.service-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--gold),var(--gold-2));transform:scaleX(0);transform-origin:left;transition:.3s}
.service-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.service-card:hover::before{transform:scaleX(1)}
.service-icon{width:62px;height:62px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(11,42,91,.08),rgba(232,184,75,.12));color:var(--navy);margin-bottom:20px;transition:.3s}
.service-card:hover .service-icon{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:var(--gold)}
.service-card h3{font-size:20px;color:var(--navy);margin-bottom:12px}
.service-card>p{color:var(--ink-soft);font-size:14.5px;margin-bottom:16px}
.service-card ul li{position:relative;padding-left:22px;font-size:14px;color:var(--ink-soft);margin-bottom:7px}
.service-card ul li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;
  background:linear-gradient(135deg,var(--gold),var(--gold-2))}

/* ===== 解决方案 ===== */
.solutions{background:var(--white)}
.sol-tabs{display:flex;justify-content:center;gap:12px;margin-bottom:34px}
.sol-tab{padding:10px 26px;border-radius:50px;border:1.5px solid var(--line);background:#fff;
  font-size:15px;font-weight:600;color:var(--ink-soft);cursor:pointer;transition:.25s}
.sol-tab.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.sol-panel{display:none}
.sol-panel.active{display:block;animation:fadein .4s}
@keyframes fadein{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.sol-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.sol-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:.3s}
.sol-card:hover{background:linear-gradient(160deg,#fff,var(--bg));box-shadow:var(--shadow);transform:translateY(-5px)}
.sol-badge{display:inline-block;font-size:12px;font-weight:700;padding:3px 11px;border-radius:50px;
  background:rgba(232,184,75,.16);color:var(--gold-2);margin-bottom:12px}
.sol-badge.b-blue{background:rgba(11,42,91,.1);color:var(--navy)}
.sol-card h4{font-size:18px;color:var(--navy);margin-bottom:10px}
.sol-card p{font-size:14px;color:var(--ink-soft)}

/* ===== 服务流程 ===== */
.process{background:linear-gradient(180deg,var(--bg),#fff)}
.process-track{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;position:relative}
.process-track::before{content:"";position:absolute;top:34px;left:10%;right:10%;height:2px;
  background:repeating-linear-gradient(90deg,var(--gold) 0 8px,transparent 8px 16px)}
.process-step{text-align:center;position:relative;background:#fff;padding:26px 16px;border-radius:var(--radius);
  border:1px solid var(--line);transition:.3s}
.process-step:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--gold)}
.ps-num{width:68px;height:68px;margin:0 auto 16px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:24px;font-weight:800;color:var(--navy);background:#fff;border:3px solid var(--gold);
  position:relative;z-index:1;box-shadow:0 6px 16px rgba(232,184,75,.25)}
.process-step h4{font-size:17px;color:var(--navy);margin-bottom:8px}
.process-step p{font-size:13.5px;color:var(--ink-soft)}

/* ===== 为什么选择我们 ===== */
.why{background:linear-gradient(135deg,var(--navy-deep),var(--navy));color:#fff;overflow:hidden;position:relative}
.why::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 85% 15%,rgba(232,184,75,.16),transparent 45%)}
.why-grid{position:relative;display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:center}
.why-head .section-tag{background:rgba(232,184,75,.18)}
.why-list{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.why-item{display:flex;gap:16px;padding:20px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);transition:.3s}
.why-item:hover{background:rgba(255,255,255,.09);transform:translateY(-3px)}
.why-ic{flex:0 0 auto;width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;color:var(--navy-deep);background:linear-gradient(135deg,var(--gold),var(--gold-2))}
.why-item h4{font-size:16px;margin-bottom:5px;color:#fff}
.why-item p{font-size:13.5px;color:rgba(255,255,255,.7)}

/* ===== 成功案例 ===== */
.cases{background:var(--bg)}
.cases-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.case-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  transition:.3s;display:flex;flex-direction:column}
.case-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.case-banner{height:130px;position:relative;display:flex;align-items:flex-end;padding:18px}
.case-banner.b1{background:linear-gradient(135deg,#0B2A5B,#2a5fa8)}
.case-banner.b2{background:linear-gradient(135deg,#1a3a6e,#3B82F6)}
.case-banner.b3{background:linear-gradient(135deg,#7a4a12,#E8B84B)}
.case-banner.b4{background:linear-gradient(135deg,#13357a,#5b6fa8)}
.case-cat{background:rgba(255,255,255,.2);backdrop-filter:blur(4px);color:#fff;padding:4px 12px;border-radius:50px;font-size:12px;font-weight:600}
.case-body{padding:22px 22px 24px;flex:1;display:flex;flex-direction:column}
.case-body h3{font-size:16.5px;color:var(--navy);margin-bottom:10px;line-height:1.4}
.case-body p{font-size:13.5px;color:var(--ink-soft);flex:1;margin-bottom:14px}
.case-tags{display:flex;gap:7px;flex-wrap:wrap}
.case-tags span{font-size:11.5px;padding:3px 9px;border-radius:6px;background:var(--bg-2);color:var(--ink-soft)}

/* ===== 联系我们 ===== */
.contact{background:linear-gradient(135deg,var(--navy-deep),var(--navy));color:#fff;position:relative;overflow:hidden}
.contact::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 10% 90%,rgba(232,184,75,.16),transparent 45%)}
.contact-grid{position:relative;display:grid;grid-template-columns:1fr 1.05fr;gap:48px;align-items:center}
.contact-info .section-tag{background:rgba(232,184,75,.18)}
.contact-list{margin-top:30px;display:flex;flex-direction:column;gap:20px}
.contact-list li{display:flex;align-items:center;gap:15px}
.contact-list svg{flex:0 0 auto}
.contact-list strong{display:block;font-size:14px;color:var(--gold-light);margin-bottom:2px}
.contact-list span{font-size:15.5px;color:rgba(255,255,255,.9)}
.contact-form-wrap{background:#fff;border-radius:20px;padding:38px 34px;box-shadow:var(--shadow-lg)}
.contact-form h3{font-size:22px;color:var(--navy);margin-bottom:24px;text-align:center}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.contact-form label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:4px}
.contact-form label:not(:last-child){display:block;margin-bottom:16px}
.contact-form input,.contact-form select,.contact-form textarea{
  width:100%;padding:11px 14px;border:1.5px solid var(--line);border-radius:9px;font-size:14.5px;
  font-family:inherit;color:var(--ink);background:var(--bg);transition:.2s;margin-top:2px}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{
  outline:none;border-color:var(--gold);background:#fff;box-shadow:0 0 0 3px rgba(232,184,75,.15)}
.contact-form textarea{resize:vertical}
.form-note{margin-top:14px;font-size:13.5px;text-align:center;min-height:20px}
.form-note.ok{color:#1a9d57}
.form-note.err{color:#e04848}

/* ===== 页脚 ===== */
.footer{background:var(--navy-deep);color:rgba(255,255,255,.7);padding:60px 0 0}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text strong{color:#fff}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6)}
.footer-col h5{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.6);margin-bottom:11px;transition:.2s}
.footer-col a:hover{color:var(--gold-light);padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:rgba(255,255,255,.5)}

/* ===== 返回顶部 ===== */
.back-top{position:fixed;right:28px;bottom:28px;width:48px;height:48px;border-radius:50%;border:none;
  background:linear-gradient(135deg,var(--navy),var(--navy-2));color:var(--gold);cursor:pointer;
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateY(20px);transition:.3s;z-index:90}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:linear-gradient(135deg,var(--gold),var(--gold-2));color:var(--navy-deep)}

/* ===== 滚动渐入 ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:30px}
  .hero-visual{display:none}
  .about-grid,.why-grid,.contact-grid{grid-template-columns:1fr;gap:40px}
  .services-grid,.sol-grid,.cases-grid{grid-template-columns:repeat(2,1fr)}
  .process-track{grid-template-columns:repeat(2,1fr)}
  .process-track::before{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .section{padding:64px 0}
  .nav-menu{position:fixed;top:72px;left:0;right:0;flex-direction:column;background:#fff;
    padding:16px 24px;gap:4px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    transform:translateY(-130%);transition:.35s;align-items:stretch}
  .nav-menu.open{transform:none}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .topbar-contact{display:none}
  .services-grid,.sol-grid,.cases-grid,.about-points,.why-list,.process-track,.stats-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .hero{min-height:auto;padding:90px 0 60px}
  .container{padding:0 18px}
  .contact-form-wrap{padding:28px 22px}
}