/* ===== 基础变量 ===== */
:root{
  --blue:#1a5cff;
  --blue-deep:#0a2a6b;
  --cyan:#00d4ff;
  --navy:#081229;
  --ink:#1f2a44;
  --gray:#5b6b86;
  --bg:#f5f8ff;
  --bg-alt:#eef3ff;
  --white:#ffffff;
  --radius:16px;
  --shadow:0 10px 30px rgba(20,50,120,.10);
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  color:var(--ink);background:var(--white);line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,canvas,iframe{max-width:100%;}
a{text-decoration:none;color:inherit;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px;}

/* ===== 导航 ===== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .3s,box-shadow .3s;
  background:transparent;
}
.navbar.scrolled{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(10px);
  box-shadow:0 4px 20px rgba(10,40,100,.08);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:14px;}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:#fff;transition:color .3s;flex:0 0 auto;}
.navbar.scrolled .logo{color:var(--blue-deep);}
.logo-mark{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;font-size:20px;
  box-shadow:0 4px 14px rgba(26,92,255,.4);
}
.logo-text{display:flex;flex-direction:column;line-height:1.1;font-size:19px;}
.logo-text small{font-size:9px;letter-spacing:2px;opacity:.7;font-weight:600;}
.nav-menu{display:flex;align-items:center;gap:18px;flex-wrap:nowrap;flex:0 1 auto;min-width:0;margin-right:76px;}
.nav-menu a{font-weight:600;font-size:15px;color:#eaf1ff;position:relative;transition:color .3s;white-space:nowrap;}
.navbar.scrolled .nav-menu a{color:var(--ink);}
.nav-menu a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--cyan);transition:width .25s;}
.nav-menu a:hover::after{width:100%;}
.nav-phone{
  background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;
  padding:9px 18px;border-radius:30px;font-weight:700;font-size:14px;
  box-shadow:0 6px 18px rgba(26,92,255,.35);white-space:nowrap;
  flex:0 0 auto;position:relative;top:57px;
}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;}
.nav-toggle span{width:24px;height:2px;background:#fff;border-radius:2px;transition:.3s;}
.navbar.scrolled .nav-toggle span{background:var(--ink);}

/* ===== Hero ===== */
.hero{position:relative;min-height:100vh;min-height:100svh;display:flex;align-items:center;overflow:hidden;
  background:radial-gradient(1200px 600px at 70% 20%,#13357f 0%,#081229 60%,#050b1c 100%);}
#heroCanvas{position:absolute;inset:0;width:100%;height:100%;opacity:.7;}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,11,28,.2),rgba(5,11,28,.65));}
.hero-content{position:relative;z-index:2;color:#fff;text-align:center;padding-top:96px;}
.hero-tag{display:inline-block;letter-spacing:3px;font-size:14px;color:var(--cyan);
  border:1px solid rgba(0,212,255,.4);padding:6px 16px;border-radius:30px;margin-bottom:22px;}
.hero-badge{display:inline-block;font-size:13px;font-weight:700;color:#fff;letter-spacing:1px;
  background:linear-gradient(135deg,var(--blue),var(--cyan));padding:8px 20px;border-radius:30px;
  margin-bottom:18px;box-shadow:0 6px 18px rgba(26,92,255,.35);}
/* 顶部第二行：徽章 | AIClaw3.0 | 电话，三等距一行，垂直居中于导航与主标题之间 */
.hero-strip{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:0 auto 34px;max-width:1060px;}
.strip-badge{display:inline-block;font-size:13px;font-weight:700;color:#fff;letter-spacing:1px;
  background:linear-gradient(135deg,var(--blue),var(--cyan));padding:8px 20px;border-radius:30px;
  box-shadow:0 6px 18px rgba(26,92,255,.35);white-space:nowrap;}
.strip-tag{display:inline-block;letter-spacing:3px;font-size:14px;color:var(--cyan);
  border:1px solid rgba(0,212,255,.4);padding:6px 16px;border-radius:30px;white-space:nowrap;}
.strip-phone{display:inline-block;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;
  padding:9px 18px;border-radius:30px;font-weight:700;font-size:14px;
  box-shadow:0 6px 18px rgba(26,92,255,.35);white-space:nowrap;}
.hero h1{font-size:clamp(34px,6vw,62px);font-weight:900;letter-spacing:2px;
  background:linear-gradient(90deg,#fff,#bfe0ff);-webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 6px 30px rgba(0,150,255,.25);}
.hero-sub{margin:22px auto 36px;font-size:clamp(15px,2vw,19px);color:#cfe0ff;max-width:760px;}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
.btn{padding:14px 32px;border-radius:30px;font-weight:700;font-size:16px;transition:transform .2s,box-shadow .2s;display:inline-block;}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;box-shadow:0 10px 26px rgba(26,92,255,.45);}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 32px rgba(26,92,255,.55);}
.btn-ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-3px);}
.scroll-down{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);color:#fff;font-size:30px;z-index:2;animation:bounce 1.8s infinite;}
@keyframes bounce{0%,100%{transform:translate(-50%,0);}50%{transform:translate(-50%,10px);}}

/* ===== 通用区块 ===== */
.section{padding:90px 0;}
.section-alt{background:var(--bg);}
.section-head{text-align:center;margin-bottom:54px;}
.eyebrow{letter-spacing:4px;font-size:13px;font-weight:700;color:var(--blue);}
.section-head h2{font-size:clamp(26px,4vw,40px);font-weight:900;margin:10px 0 8px;color:var(--blue-deep);}
.section-desc{color:var(--gray);font-size:16px;}

/* ===== 关于 ===== */
.about-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:46px;align-items:center;}
.about-text p{margin-bottom:16px;font-size:16px;color:#33425f;}
.about-text strong{color:var(--blue);}
.about-points{list-style:none;margin-top:18px;}
.about-points li{margin:8px 0;color:var(--ink);font-weight:600;}
.about-card{background:linear-gradient(160deg,#0d2c70,#0a1f4d);color:#fff;border-radius:22px;padding:38px;box-shadow:var(--shadow);}
.about-card h3{font-size:22px;margin-bottom:6px;}
.about-card .hl{color:var(--cyan);}
.about-stats{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:26px 0 12px;}
.about-stats div{background:rgba(255,255,255,.08);border-radius:14px;padding:16px;text-align:center;}
.about-stats b{display:block;font-size:30px;font-weight:900;color:var(--cyan);}
.about-stats span{font-size:13px;opacity:.85;}
.about-card .note{font-size:12px;opacity:.6;margin-top:4px;}

/* ===== 服务卡片 ===== */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{background:#fff;border-radius:var(--radius);padding:32px 26px;box-shadow:var(--shadow);
  border:1px solid #eaf0ff;transition:transform .25s,box-shadow .25s;}
.card:hover{transform:translateY(-8px);box-shadow:0 18px 40px rgba(20,60,140,.16);border-color:var(--cyan);}
.card-icon{font-size:38px;margin-bottom:14px;}
.card h3{font-size:19px;margin-bottom:10px;color:var(--blue-deep);}
.card p{color:var(--gray);font-size:15px;}

/* ===== 优势 ===== */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.adv-item{position:relative;background:#fff;border-radius:var(--radius);padding:30px 26px 26px;
  box-shadow:var(--shadow);overflow:hidden;border-top:3px solid var(--blue);}
.adv-no{position:absolute;top:14px;right:18px;font-size:42px;font-weight:900;color:#eef3ff;}
.adv-item h3{font-size:18px;color:var(--blue-deep);margin-bottom:8px;position:relative;z-index:1;}
.adv-item p{color:var(--gray);font-size:14.5px;position:relative;z-index:1;}

/* ===== 流程 ===== */
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;}
.step{background:#fff;border-radius:var(--radius);padding:28px 20px;text-align:center;box-shadow:var(--shadow);position:relative;}
.step-no{width:50px;height:50px;border-radius:50%;margin:0 auto 14px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;font-weight:900;font-size:20px;}
.step h3{font-size:17px;color:var(--blue-deep);margin-bottom:6px;}
.step p{font-size:13.5px;color:var(--gray);}

/* ===== 联系 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:34px;margin-bottom:34px;}
.contact-info{display:grid;gap:18px;align-content:start;}
.info-item{display:flex;gap:14px;align-items:flex-start;background:#fff;border-radius:14px;padding:18px 20px;box-shadow:var(--shadow);}
.info-ic{font-size:24px;}
.info-item b{display:block;font-size:14px;color:var(--gray);margin-bottom:2px;}
.info-item a,.info-item p{font-size:17px;font-weight:700;color:var(--blue-deep);}
.contact-form{background:#fff;border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);}
.field{margin-bottom:14px;}
.field input,.field textarea{width:100%;padding:13px 16px;border:1.5px solid #e2e9f7;border-radius:12px;
  font-size:15px;font-family:inherit;outline:none;transition:border .2s;}
.field input:focus,.field textarea:focus{border-color:var(--blue);}
.btn-block{width:100%;border:0;cursor:pointer;margin-top:4px;}
.form-tip{font-size:13px;color:var(--gray);text-align:center;margin-top:12px;}

/* ===== 页脚 ===== */
.footer{background:var(--navy);color:#cdd8ee;padding:54px 0 0;}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px;}
.footer .logo{color:#fff;}
.footer-brand p{margin-top:14px;font-size:14px;line-height:1.9;}
.footer-col h4{color:#fff;margin-bottom:16px;font-size:16px;}
.footer-col a,.footer-col p{display:block;color:#aab8d6;font-size:14px;margin-bottom:10px;}
.footer-col a:hover{color:var(--cyan);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);text-align:center;padding:20px;margin-top:40px;font-size:13px;color:#8896b5;}

/* ===== 滚动揭示动画 ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease;}
.reveal.show{opacity:1;transform:none;}

/* ===== GEO 板块 ===== */
.geo-intro{display:grid;grid-template-columns:1.6fr 1fr;gap:34px;align-items:center;margin-bottom:50px;}
.geo-intro-text h3{font-size:22px;color:var(--blue-deep);margin-bottom:14px;}
.geo-intro-text p{color:#33425f;margin-bottom:14px;font-size:16px;}
.geo-intro-text b{color:var(--blue);}
.geo-intro-stats{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.geo-intro-stats div{background:linear-gradient(160deg,#0d2c70,#0a1f4d);color:#fff;border-radius:16px;padding:20px;text-align:center;box-shadow:var(--shadow);}
.geo-intro-stats b{display:block;font-size:30px;font-weight:900;color:var(--cyan);}
.geo-intro-stats span{font-size:13px;opacity:.85;}
.sub-title{font-size:clamp(20px,3vw,28px);color:var(--blue-deep);font-weight:900;margin:46px 0 24px;text-align:center;}
.sub-title::after{content:"";display:block;width:56px;height:4px;border-radius:4px;background:linear-gradient(90deg,var(--blue),var(--cyan));margin:12px auto 0;}
.dual-engine{display:grid;grid-template-columns:1fr auto 1fr;gap:18px;align-items:center;margin-bottom:10px;}
.de-card{background:#fff;border-radius:var(--radius);padding:30px 28px;box-shadow:var(--shadow);border:1px solid #eaf0ff;position:relative;overflow:hidden;}
.de-card::before{content:"";position:absolute;left:0;top:0;width:100%;height:4px;background:linear-gradient(90deg,var(--blue),var(--cyan));}
.de-tag{display:inline-block;font-size:12px;font-weight:700;color:var(--blue);background:#eaf1ff;padding:4px 12px;border-radius:20px;margin-bottom:12px;}
.de-card h3{font-size:20px;color:var(--blue-deep);margin-bottom:10px;}
.de-card p{color:var(--gray);font-size:15px;}
.de-plus{font-size:34px;font-weight:900;color:var(--blue);text-align:center;}
.geo-why{background:linear-gradient(160deg,#0d2c70,#0a1f4d);color:#fff;border-radius:22px;padding:40px;margin-top:50px;box-shadow:var(--shadow);text-align:center;}
.geo-why h3{font-size:24px;margin-bottom:20px;}
.geo-why ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:26px;text-align:left;}
.geo-why li{background:rgba(255,255,255,.08);border-radius:14px;padding:16px 18px;font-size:15px;color:#dbe6ff;}
.geo-why li b{color:var(--cyan);}
.geo-why .btn-primary{background:#fff;color:var(--blue-deep);}

/* GEO 价值与收益 */
.geo-value{margin-top:50px;}
.geo-value h3{font-size:24px;color:var(--blue-deep);text-align:center;margin-bottom:14px;}
.geo-value-desc{max-width:860px;margin:0 auto 30px;color:#44567a;font-size:15px;text-align:center;line-height:1.8;}
.geo-value-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;}
.gv-col{background:#f4f8ff;border:1px solid #e1ecff;border-radius:20px;padding:28px 30px;box-shadow:var(--shadow);}
.gv-col h4{font-size:19px;color:var(--blue);margin-bottom:16px;}
.gv-col ul{list-style:none;display:flex;flex-direction:column;gap:14px;}
.gv-col li{position:relative;padding-left:18px;font-size:15px;color:#2b3a55;line-height:1.7;}
.gv-col li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;background:var(--cyan);}
.gv-col li b{color:var(--blue-deep);}
.geo-value-note{margin-top:24px;padding:14px 18px;background:#eef4ff;border-left:4px solid var(--blue);border-radius:0 12px 12px 0;font-size:13px;color:#5a6b8c;line-height:1.7;}

/* 资质背书 */
.geo-qual{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin:-12px 0 42px;}
.qual{background:#fff;border:1px solid #dde7ff;color:var(--blue-deep);font-weight:700;font-size:14px;
  padding:10px 18px;border-radius:30px;box-shadow:var(--shadow);}

/* 技术原理四层 */
.geo-principle{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:6px;}
.gp-step{background:#fff;border-radius:var(--radius);padding:26px 22px;box-shadow:var(--shadow);
  border-top:3px solid var(--cyan);}
.gp-no{font-size:13px;font-weight:900;color:var(--blue);letter-spacing:1px;}
.gp-step h4{font-size:20px;color:var(--blue-deep);margin:8px 0 8px;}
.gp-step p{font-size:14px;color:var(--gray);}

/* ===== 运营服务 ===== */
.op-cta{margin-top:46px;background:linear-gradient(160deg,#0d2c70,#0a1f4d);color:#fff;border-radius:22px;
  padding:38px;text-align:center;box-shadow:var(--shadow);}
.op-cta p{font-size:17px;max-width:760px;margin:0 auto 22px;color:#dbe6ff;}
.op-cta .btn-primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;}

/* ===== 行业案例 ===== */
.industry-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-bottom:10px;}
.industry{background:#fff;border:1px solid #eaf0ff;border-radius:14px;padding:18px 8px;text-align:center;
  box-shadow:var(--shadow);transition:transform .2s,border-color .2s;}
.industry:hover{transform:translateY(-5px);border-color:var(--cyan);}
.industry .ic{font-size:26px;display:block;}
.industry span{display:block;font-size:14px;margin-top:7px;color:var(--ink);font-weight:600;}
.case-list{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.case-card{background:#fff;border-radius:var(--radius);padding:28px 26px;box-shadow:var(--shadow);
  border-left:4px solid var(--blue);transition:transform .2s,box-shadow .2s;}
.case-card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(20,60,140,.16);}
.case-card h3{color:var(--blue-deep);font-size:19px;margin-bottom:14px;}
.case-row{margin-bottom:10px;font-size:14.5px;color:#33425f;line-height:1.6;}
.case-row b{color:var(--blue);}
.case-result{background:linear-gradient(160deg,#0d2c70,#0a1f4d);color:#fff;border-radius:12px;
  padding:13px 16px;margin-top:8px;font-size:14px;line-height:1.6;}
.case-result b{color:var(--cyan);}
.cases-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:46px;}
.cases-stats div{background:linear-gradient(160deg,#0d2c70,#0a1f4d);color:#fff;border-radius:16px;
  padding:22px;text-align:center;box-shadow:var(--shadow);}
.cases-stats b{display:block;font-size:30px;font-weight:900;color:var(--cyan);}
.cases-stats span{font-size:13px;opacity:.85;}
.cases-note{font-size:12.5px;color:var(--gray);margin-top:16px;text-align:center;line-height:1.7;}

/* ===== 响应式 ===== */
/* 笔记本 / 小平板：缩小导航间距，避免菜单挤压换行 */
@media (max-width:1080px){
  .nav-menu{gap:16px;}
  .nav-menu a{font-size:14px;}
  .hero-strip{gap:12px;margin-bottom:28px;}
  .strip-badge{font-size:12px;padding:7px 14px;}
  .strip-tag{font-size:12.5px;padding:5px 12px;letter-spacing:1px;}
  .strip-phone{font-size:13px;padding:8px 14px;}
  .nav-phone{font-size:12.5px;padding:7px 13px;top:48px;}
  .logo-text{font-size:16px;}
  .logo-text small{letter-spacing:1px;}
}
@media (max-width:900px){
  .nav-menu{position:fixed;top:72px;right:0;width:240px;background:#fff;flex-direction:column;margin-right:0;
    gap:0;padding:10px 0;box-shadow:0 12px 30px rgba(10,40,100,.15);transform:translateX(110%);transition:transform .3s;}
  .nav-menu.open{transform:none;}
  .nav-menu a{color:var(--ink);padding:14px 24px;display:block;}
  .nav-toggle{display:flex;}
  .nav-phone{display:none;}
  .strip-phone{display:none;}
  .hero-strip{flex-wrap:wrap;justify-content:center;gap:10px 14px;margin-bottom:24px;}
  .about-grid,.contact-grid{grid-template-columns:1fr;}
  .cards,.adv-grid{grid-template-columns:1fr 1fr;}
  .case-list{grid-template-columns:1fr;}
  .industry-grid{grid-template-columns:repeat(3,1fr);}
  .cases-stats{grid-template-columns:1fr 1fr;}
  .process{grid-template-columns:1fr 1fr;}
  .footer-inner{grid-template-columns:1fr;}
  .geo-intro,.dual-engine{grid-template-columns:1fr;}
  .geo-principle{grid-template-columns:1fr 1fr;}
  .de-plus{transform:rotate(90deg);}
  .geo-why ul{grid-template-columns:1fr;}
  .geo-value-grid{grid-template-columns:1fr;}
}
@media (max-width:560px){
  .container{padding:0 16px;}
  .cards,.adv-grid,.process{grid-template-columns:1fr;}
  .geo-principle{grid-template-columns:1fr;}
  .industry-grid{grid-template-columns:repeat(2,1fr);}
  .cases-stats{grid-template-columns:1fr 1fr;}
  .section{padding:64px 0;}
  .about-stats{grid-template-columns:1fr 1fr;}
  .hero-content{padding-top:84px;}
  .hero-btns .btn{width:100%;max-width:320px;}
  .geo-why,.op-cta,.about-card{padding:30px 20px;}
  .geo-intro-stats b{font-size:24px;}
  .contact-form{padding:24px 18px;}
  .footer-inner{gap:24px;}
}

/* FAQ 折叠问答 */
.faq-list{max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:14px;}
.faq-item{background:#fff;border:1px solid #e6ebf2;border-radius:var(--radius);padding:0 22px;box-shadow:0 6px 20px rgba(20,60,140,.06);overflow:hidden;transition:border-color .2s,box-shadow .2s;}
.faq-item[open]{border-color:var(--cyan);box-shadow:0 10px 28px rgba(20,60,140,.12);}
.faq-item summary{cursor:pointer;list-style:none;font-size:17px;font-weight:600;color:var(--blue-deep);padding:18px 0;position:relative;outline:none;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";position:absolute;right:2px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--cyan);font-weight:700;transition:transform .2s;}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg);}
.faq-item p{padding:0 0 20px;color:var(--gray);font-size:15px;line-height:1.8;}