/* ============================================================
   谋动调查 · 商务调查官网样式
   深蓝商务风 / 响应式 / 零外部依赖
   ============================================================ */
:root{
  --navy:#0b2545;
  --navy-2:#13315c;
  --blue:#1d4e89;
  --blue-l:#2f6fb5;
  --red:#b8282f;
  --gold:#c9a254;
  --ink:#23303f;
  --gray:#5c6b7d;
  --line:#e3e8ef;
  --bg:#f4f6fa;
  --white:#fff;
  --shadow:0 8px 30px rgba(11,37,69,.10);
  --shadow-lg:0 18px 50px rgba(11,37,69,.16);
  --radius:14px;
  --maxw:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:.25s}
ul{list-style:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
section{padding:78px 0}

/* ---------- 顶部条 ---------- */
.topbar{background:var(--navy);color:#cdd9e8;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar b{color:var(--gold);font-weight:600;letter-spacing:.5px}
.topbar .tb-right span{margin-left:18px}
.topbar a{color:#cdd9e8}
.topbar a:hover{color:#fff}

/* ---------- 头部 / 导航 ---------- */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);box-shadow:0 1px 0 var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:46px;width:auto}
.brand .brand-sub{font-size:12px;color:var(--gray);line-height:1.3;border-left:1px solid var(--line);padding-left:12px}
.menu{display:flex;align-items:center;gap:4px}
.menu a{padding:10px 16px;font-size:15.5px;font-weight:500;color:var(--ink);border-radius:8px;position:relative}
.menu a:hover,.menu a.active{color:var(--blue)}
.menu a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:2px;height:3px;background:var(--red);border-radius:3px}
.nav-call{display:none}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;background:none;border:0}
.burger span{width:26px;height:3px;background:var(--navy);border-radius:3px;transition:.3s}

/* ---------- Hero 轮播 ---------- */
.hero{position:relative;height:min(68vh,600px);overflow:hidden;background:var(--navy)}
.slides{position:absolute;inset:0}
.slide{position:absolute;inset:0;opacity:0;transition:opacity 1.1s ease;background-size:cover;background-position:center}
.slide.active{opacity:1}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,37,69,.05) 40%,rgba(8,26,51,.78) 100%)}
.hero-inner{position:relative;z-index:2;height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:flex-end;color:#fff;max-width:var(--maxw);margin:0 auto;padding:0 22px 60px}
.hero-inner h1{font-size:clamp(24px,3.6vw,42px);font-weight:800;line-height:1.28;text-shadow:0 3px 14px rgba(0,0,0,.55);max-width:760px}
.hero-inner p{margin-top:18px;font-size:clamp(15px,1.6vw,19px);color:#eaf1fa;text-shadow:0 2px 10px rgba(0,0,0,.4);max-width:680px}
.hero-cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.dots{position:absolute;bottom:22px;left:0;right:0;z-index:3;display:flex;justify-content:center;gap:10px}
.dots i{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.45);cursor:pointer;transition:.3s}
.dots i.active{background:#fff;width:28px;border-radius:6px}

/* ---------- 通用组件 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:50px;font-weight:600;font-size:15px;cursor:pointer;border:0;transition:.25s}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 8px 22px rgba(184,40,47,.32)}
.btn-primary:hover{background:#a02028;transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.6);backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.26)}
.btn-outline{background:#fff;color:var(--blue);border:1.5px solid var(--blue)}
.btn-outline:hover{background:var(--blue);color:#fff}

.sec-head{text-align:center;max-width:760px;margin:0 auto 54px}
.sec-head .eyebrow{display:inline-block;color:var(--red);font-weight:700;letter-spacing:3px;font-size:13px;margin-bottom:10px}
.sec-head h2{font-size:clamp(24px,3vw,36px);color:var(--navy);font-weight:800}
.sec-head .bar{width:56px;height:4px;background:var(--red);border-radius:4px;margin:16px auto 0}
.sec-head p{margin-top:14px;color:var(--gray)}

/* 服务卡片 */
.grid{display:grid;gap:22px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 26px;transition:.3s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.card .ic{width:60px;height:60px;border-radius:12px;background:linear-gradient(135deg,var(--navy),var(--blue));display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:20px}
.card .ic svg{width:30px;height:30px}
.card h3{font-size:19px;color:var(--navy);margin-bottom:10px}
.card p{font-size:14px;color:var(--gray);line-height:1.75}
.card .more{display:inline-block;margin-top:14px;color:var(--blue);font-weight:600;font-size:14px}
.card:hover .more{color:var(--red)}

/* 优势条 */
.adv{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.adv::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(47,111,181,.35),transparent 55%)}
.adv .sec-head h2,.adv h3{color:#fff}
.adv .sec-head .eyebrow{color:var(--gold)}
.adv-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:28px 24px}
.adv-card .num{font-size:34px;font-weight:800;color:var(--gold);line-height:1}
.adv-card h4{margin:12px 0 8px;font-size:17px}
.adv-card p{font-size:14px;color:#c4d2e3}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stats .st b{display:block;font-size:42px;font-weight:800;color:var(--navy)}
.stats .st b span{color:var(--red)}
.stats .st em{font-style:normal;color:var(--gray);font-size:14px}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:step}
.flow .step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 20px;text-align:center;position:relative}
.flow .step::before{counter-increment:step;content:counter(step,decimal-leading-zero);position:absolute;top:14px;right:16px;font-size:26px;font-weight:800;color:#eef2f7}
.flow .step .cir{width:54px;height:54px;margin:0 auto 14px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--navy));color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px}
.flow .step h4{color:var(--navy);margin-bottom:8px}
.flow .step p{font-size:13.5px;color:var(--gray)}

/* 图文 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split .fig{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.split .fig img{width:100%;height:100%;object-fit:cover}
.split h2{font-size:30px;color:var(--navy);margin-bottom:18px}
.split .feat{margin-top:18px;display:grid;gap:12px}
.split .feat li{display:flex;gap:12px;align-items:flex-start;color:var(--gray)}
.split .feat li::before{content:"✓";flex:0 0 22px;height:22px;border-radius:50%;background:#e8f0fa;color:var(--blue);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:13px;margin-top:2px}

/* 案例 */
.case-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s}
.case-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.case-item .thumb{height:180px;overflow:hidden}
.case-item .thumb img{width:100%;height:100%;object-fit:cover;transition:.5s}
.case-item:hover .thumb img{transform:scale(1.06)}
.case-item .body{padding:22px}
.case-item .tag{display:inline-block;font-size:12px;color:var(--red);background:#fbecec;padding:3px 10px;border-radius:20px;margin-bottom:10px}
.case-item h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.case-item p{font-size:13.5px;color:var(--gray);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* CTA */
.cta{background:linear-gradient(120deg,var(--navy),var(--blue));color:#fff;border-radius:20px;padding:54px 40px;text-align:center;position:relative;overflow:hidden}
.cta h2{font-size:clamp(22px,3vw,32px);margin-bottom:10px}
.cta p{color:#cfe0f3;max-width:640px;margin:0 auto 26px}
.cta .phone{font-size:clamp(24px,4vw,40px);font-weight:800;color:var(--gold);letter-spacing:1px}

/* 页脚 */
.footer{background:#081a33;color:#9fb1c8;font-size:14px;padding:60px 0 0}
.footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px}
.footer h4{color:#fff;font-size:16px;margin-bottom:18px}
.footer .brand-foot img{height:44px;margin-bottom:16px;background:#fff;border-radius:8px;padding:6px 10px}
.footer li{margin-bottom:10px}
.footer a:hover{color:#fff}
.footer .contact li{display:flex;gap:10px}
.copyright{border-top:1px solid rgba(255,255,255,.08);padding:18px 0;text-align:center;font-size:13px;color:#7e93ad}
.copyright a{color:#7e93ad}

/* 内页页头 */
.pg-head{background:linear-gradient(120deg,var(--navy),var(--blue));color:#fff;padding:64px 0}
.pg-head h1{font-size:clamp(26px,3.4vw,38px);font-weight:800}
.pg-head .crumb{margin-top:10px;font-size:14px;color:#bcd0e8}
.pg-head .crumb a{color:#fff}

/* 文章页 */
.article{background:#fff;border-radius:var(--radius);padding:44px;box-shadow:var(--shadow)}
.article h2{color:var(--navy);margin:26px 0 12px;font-size:22px}
.article p{margin-bottom:14px;color:#3a4757}
.article ul{margin:0 0 16px;padding-left:0;display:grid;gap:8px}
.article ul li{padding-left:22px;position:relative;color:#3a4757}
.article ul li::before{content:"▪";position:absolute;left:4px;color:var(--red)}

/* 表单 */
.form{display:grid;gap:16px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form input,.form textarea{width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fafbfd}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--blue);background:#fff}
.form textarea{min-height:120px;resize:vertical}

/* 悬浮拨号 */
.float-call{position:fixed;right:22px;bottom:90px;z-index:90;display:flex;flex-direction:column;gap:10px}
.float-call a{width:58px;height:58px;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;font-size:11px;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.float-call .tel{background:var(--red)}
.float-call .tel:hover{background:#a02028}
.float-call svg{width:24px;height:24px}
.mobile-bar{display:none}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:30px}
  .footer .cols{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .menu{position:fixed;top:0;right:-280px;width:260px;height:100vh;background:#fff;flex-direction:column;align-items:flex-start;padding:90px 24px;box-shadow:-8px 0 30px rgba(0,0,0,.15);transition:.35s;z-index:120}
  .menu.open{right:0}
  .menu a{width:100%;padding:14px 8px;border-bottom:1px solid var(--line)}
  .burger{display:flex;z-index:130}
  .burger.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .burger.open span:nth-child(2){opacity:0}
  .burger.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
  .topbar .tb-right .hide-m{display:none}
}
@media(max-width:600px){
  html,body{overflow-x:hidden}
  section{padding:44px 0}
  .container{padding:0 16px}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr;gap:24px}
  .article{padding:22px 16px;margin:0 -4px}
  .article h2{font-size:19px;margin:22px 0 10px;line-height:1.4}
  .article p{font-size:15.5px;line-height:1.85;margin-bottom:12px}
  .article img{border-radius:10px;margin:14px 0}
  .hero{height:46vh;min-height:340px}
  .nav{height:60px}
  .brand img{height:38px}
  .brand .brand-sub{display:none}
  /* 卡片两列、双数排列 */
  .grid-4,.grid-3,.grid-2{grid-template-columns:repeat(2,1fr);gap:14px}
  .flow{grid-template-columns:repeat(2,1fr);gap:14px}
  .stats{grid-template-columns:repeat(2,1fr);gap:14px}
  /* 卡片紧凑 */
  .card{padding:20px 16px}
  .card .ic{width:44px;height:44px;margin-bottom:12px}
  .card h3{font-size:16px;line-height:1.4}
  .card p{font-size:13px;line-height:1.65}
  .case-item .body{padding:16px}
  .case-item h3{font-size:15.5px}
  .case-item .thumb{height:150px}
  .adv-card{padding:20px 16px}
  .adv-card .num{font-size:28px}
  .adv-card h4{font-size:15.5px}
  .flow .step{padding:22px 14px}
  .flow .step .cir{width:44px;height:44px;font-size:18px;margin-bottom:10px}
  .flow .step h4{font-size:15px}
  .flow .step p{font-size:12.5px}
  /* hero 文字左对齐，按钮全宽 */
  .hero-inner{align-items:flex-start;padding:0 20px 60px}
  .hero-inner h1{font-size:23px;line-height:1.35}
  .hero-inner p{font-size:14px;margin-top:10px}
  .hero-cta{margin-top:18px;width:100%}
  .hero-cta .btn{flex:1 1 140px;justify-content:center;padding:12px 16px;font-size:14px}
  /* 通用间距收紧 */
  .sec-head{margin-bottom:32px}
  .sec-head h2{font-size:23px}
  .sec-head p{font-size:14px}
  .card{padding:24px 20px}
  .card .ic{width:50px;height:50px;margin-bottom:14px}
  .card h3{font-size:17.5px}
  .cta{padding:36px 22px;border-radius:16px}
  .cta h2{font-size:22px}
  .cta .phone{font-size:26px}
  .pg-head{padding:40px 0}
  .pg-head h1{font-size:23px;line-height:1.4}
  .stats .st b{font-size:32px}
  .split h2{font-size:22px}
  /* 表单单列 */
  .form .row{grid-template-columns:1fr}
  /* 悬浮电话上移，避开底部拨号条 */
  .float-call{bottom:80px;right:14px}
  .float-call a{width:50px;height:50px}
  /* 移动端底部固定拨号条 */
  .mobile-bar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:110;height:58px;background:#fff;box-shadow:0 -4px 18px rgba(0,0,0,.12)}
  .mobile-bar a{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;font-weight:700;color:var(--blue);border-right:1px solid var(--line);min-height:58px}
  .mobile-bar a:last-child{background:var(--red);color:#fff;flex:1.4;border:0}
  body{padding-bottom:58px}
  /* 服务/案例卡片图不太高 */
  .case-item .thumb{height:170px}
}
@media(max-width:380px){
  .hero-inner h1{font-size:23px}
  .card{padding:20px 16px}
  .cta .phone{font-size:22px}
}

/* ---------- FAQ 手风琴 ---------- */
.faq{display:grid;gap:12px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.25s}
.faq details[open]{border-color:var(--blue);box-shadow:0 6px 20px rgba(29,78,137,.08)}
.faq summary{list-style:none;cursor:pointer;padding:18px 48px 18px 20px;font-weight:600;font-size:16px;color:var(--navy);position:relative;line-height:1.5}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);width:26px;height:26px;border-radius:50%;background:var(--bg);color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:600;transition:.25s}
.faq details[open] summary::after{content:"−";background:var(--red);color:#fff}
.faq .faq-a{padding:0 20px 18px;color:var(--gray);font-size:15px;line-height:1.8;border-top:1px dashed var(--line);padding-top:14px}

/* 移动端图片精细适配 */
@media(max-width:600px){
  .article img{width:100%!important;height:auto!important;border-radius:8px;margin:12px 0;object-fit:cover}
  .case-item .thumb{height:160px}
  .split .fig img{height:200px}
}

/* 移动端图片最终版 */
@media(max-width:600px){
  .article img{width:100%!important;max-width:100%!important;height:auto!important;border-radius:8px;margin:12px 0;display:block}
  .article img:first-of-type{margin-top:0}
  .case-item .thumb{height:150px}
  .case-item .thumb img{width:100%;height:100%;object-fit:cover}
  .pg-head{padding:36px 0}
  .pg-head h1{font-size:21px;line-height:1.45}
}

/* 移动端hero单独适配 */
@media(max-width:600px){
  .hero{height:42vh;min-height:300px}
  .slide{background-position:center center!important}
  .hero-inner{padding:0 18px 50px;justify-content:flex-end}
  .hero-inner h1{font-size:22px;line-height:1.35}
  .hero-inner p{display:none}
  .hero-cta .btn{padding:11px 16px;font-size:13.5px}
}

/* 移动端专用banner */
@media(max-width:600px){
  .slides .slide:nth-child(1){background-image:url('../images/banner-m-1.jpg?v=3')!important;background-size:cover!important}
  .slides .slide:nth-child(2){background-image:url('../images/banner-m-2.jpg?v=3')!important;background-size:cover!important}
  .slides .slide:nth-child(3){background-image:url('../images/banner-m-3.jpg?v=3')!important;background-size:cover!important}
  .slides .slide:nth-child(4){background-image:url('../images/banner-m-4.jpg?v=3')!important;background-size:cover!important}
}

/* hero slogan（仅移动端显示，PC banner自带文字） */
.hero-slogan{display:none}
@media(max-width:600px){
  .hero-slogan{display:none!important}
  .hero-slogan h2{
    font-family:'Noto Serif SC','Songti SC',serif;
    font-size:34px;font-weight:900;line-height:1.5;
    letter-spacing:6px;
    color:#fff;
    text-shadow:0 2px 20px rgba(0,0,0,.6);
    border-left:3px solid rgba(255,255,255,.6);
    padding-left:14px;
  }
  .hero-inner{padding-bottom:48px;justify-content:flex-end}
  .hero-cta{margin-top:0}
}

/* slide 内嵌文字（仅移动端显示） */
.slide-text{display:none}
@media(max-width:600px){
  .slide-text{
    display:block;position:absolute;left:0;right:0;top:22%;
    text-align:center;padding:0 20px;
  }
  .slide-text h2{
    font-size:38px;line-height:1.3;color:#fff;
    text-shadow:0 4px 24px rgba(0,0,0,.7);
    margin-bottom:10px;
  }
  .slide-text p{
    font-size:16px;color:rgba(255,255,255,.85);
    letter-spacing:3px;text-shadow:0 2px 12px rgba(0,0,0,.6);
  }
  /* 4种不同字体风格 */
  .st1 h2{font-family:'Noto Serif SC',serif;font-weight:900;letter-spacing:8px}
  .st2 h2{font-family:'Noto Serif SC',serif;font-weight:700;letter-spacing:4px;font-style:italic}
  .st3 h2{font-family:'Ma Shan Zheng',cursive;font-weight:400;letter-spacing:2px;font-size:34px}
  .st4 h2{font-family:'Noto Sans SC',sans-serif;font-weight:900;letter-spacing:6px}
}