/* ===== 基础变量 ===== */
:root{
  --navy:#0d2440;
  --navy-2:#102a43;
  --steel:#1d4ed8;
  --orange:#ff6a00;
  --orange-d:#e85d00;
  --bg:#f5f7fa;
  --bg-alt:#eef2f7;
  --text:#1a2433;
  --muted:#5b6b7e;
  --line:#e2e8f0;
  --white:#fff;
  --radius:16px;
  --shadow:0 10px 30px rgba(13,36,64,.08);
  --shadow-lg:0 18px 50px rgba(13,36,64,.14);
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);background:var(--white);line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
section{scroll-margin-top:76px}

/* ===== 按钮 ===== */
.btn{display:inline-block;padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;transition:.25s;border:2px solid transparent}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 8px 20px rgba(255,106,0,.3)}
.btn-primary:hover{background:var(--orange-d);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--navy);border-color:rgba(13,36,64,.25)}
.btn-ghost:hover{border-color:var(--navy);background:rgba(13,36,64,.04)}
.btn-nav{background:var(--orange);color:#fff;padding:9px 20px;font-size:14px}
.btn-nav:hover{background:var(--orange-d)}
.btn-block{width:100%;text-align:center;padding:15px}

/* ===== 顶部导航 ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:.3s}
.header.scrolled{box-shadow:var(--shadow)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--navy)}
.logo-mark{flex:none}
.logo-accent{color:var(--orange)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{font-size:15px;color:var(--navy-2);font-weight:500;transition:.2s}
.nav-links a:hover{color:var(--orange)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2.5px;background:var(--navy);border-radius:2px;transition:.3s}

/* ===== 首屏轮播（浅色版） ===== */
.hero{position:relative;padding:120px 0 80px;background:linear-gradient(180deg,#ffffff,#eef2f7);color:var(--text);overflow:hidden}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(900px 500px at 82% -12%,rgba(255,106,0,.09),transparent 60%),
  radial-gradient(700px 500px at 0% 112%,rgba(29,78,216,.07),transparent 60%)}
.hero-bg::after{content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(13,36,64,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(13,36,64,.05) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(circle at 70% 30%,#000,transparent 75%)}
.hero-inner{position:relative;z-index:2}
.hero-stats{margin-top:56px;position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;max-width:880px;margin-left:auto;margin-right:auto}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 12px;box-shadow:var(--shadow)}
.stat b{display:block;font-size:clamp(28px,4vw,42px);font-weight:800;color:var(--navy)}
.stat span{font-size:13px;color:var(--muted)}

.carousel{position:relative;max-width:1100px;margin:0 auto;overflow:hidden}
.car-track{display:flex;transition:transform .65s cubic-bezier(.4,0,.2,1)}
.slide{flex:0 0 100%;min-width:0;display:grid;grid-template-columns:1.08fr .92fr;gap:44px;align-items:center;padding:8px 6px}
.slide-text{text-align:left}
.hero-badge{display:inline-block;background:rgba(255,106,0,.08);border:1px solid rgba(255,106,0,.4);color:#d95400;padding:8px 18px;border-radius:999px;font-size:14px;font-weight:600;margin-bottom:22px}
.slide-title{font-size:clamp(26px,3.6vw,42px);line-height:1.25;font-weight:800;letter-spacing:-.5px;color:var(--navy)}
.slide-title .hl{color:var(--orange)}
.slide-sub{margin:20px 0 0;max-width:560px;color:var(--muted);font-size:clamp(14.5px,1.6vw,16.5px)}
.hero-cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.btn-ghost-light{background:transparent;color:var(--navy);border-color:rgba(13,36,64,.28)}
.btn-ghost-light:hover{border-color:var(--navy);background:rgba(13,36,64,.05)}

.slide-visual{display:flex;justify-content:center}
.illu{width:100%;max-width:470px;height:auto;filter:drop-shadow(0 14px 30px rgba(13,36,64,.12))}

.car-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line);background:rgba(255,255,255,.9);color:var(--navy);font-size:26px;line-height:1;
  cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.25s;box-shadow:var(--shadow)}
.car-arrow:hover{background:var(--orange);border-color:var(--orange);color:#fff}
.car-arrow.prev{left:10px}
.car-arrow.next{right:10px}
.car-dots{display:flex;gap:9px;justify-content:center;margin-top:34px}
.car-dot{width:28px;height:5px;border-radius:3px;background:rgba(13,36,64,.16);border:0;cursor:pointer;padding:0;transition:.3s}
.car-dot.active{background:var(--orange);width:40px}

/* 旧版单屏样式保留兼容 */
.hero-title{font-size:clamp(32px,5vw,56px);line-height:1.2;font-weight:800;letter-spacing:-.5px}
.hero-title .hl{color:var(--orange)}
.hero-sub{margin:24px auto 0;max-width:760px;color:#c7d3e3;font-size:clamp(15px,1.8vw,18px)}
.hero-sub strong{color:#fff}

/* ===== 通用区块 ===== */
.section{padding:90px 0}
.section-alt{background:var(--bg)}
.sec-head{max-width:760px;margin:0 auto 52px;text-align:center}
.sec-tag{display:inline-block;color:var(--orange);font-weight:700;font-size:14px;letter-spacing:1px;margin-bottom:14px;text-transform:uppercase}
.sec-head h2{font-size:clamp(26px,3.4vw,40px);line-height:1.3;font-weight:800;color:var(--navy)}
.sec-desc{margin-top:16px;color:var(--muted);font-size:16px}

/* ===== 痛点卡片 ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);transition:.28s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(255,106,0,.35)}
.card-ic{font-size:30px;margin-bottom:14px}
.card h3{font-size:19px;color:var(--navy);margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}

/* ===== 模块卡片 ===== */
.mod-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;position:relative;overflow:hidden;transition:.28s}
.mod-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--orange),var(--steel));transform:scaleX(0);transform-origin:left;transition:.3s}
.mod-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.mod-card:hover::before{transform:scaleX(1)}
.mod-no{font-size:34px;font-weight:800;color:var(--bg-alt);line-height:1;margin-bottom:8px}
.mod-card h3{font-size:18px;color:var(--navy);margin-bottom:10px}
.mod-card p{color:var(--muted);font-size:14px}
.mod-link{display:inline-block;margin-top:12px;color:var(--orange);font-weight:600;font-size:14px;text-decoration:none}
.mod-link:hover{text-decoration:underline}

/* ===== 为什么是我们 ===== */
.why-wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.why-list{display:flex;flex-direction:column;gap:22px}
.why-item{display:flex;gap:18px;align-items:flex-start;background:var(--white);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.why-ic{font-size:28px;flex:none;background:var(--bg);width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center}
.why-item h3{font-size:18px;color:var(--navy);margin-bottom:6px}
.why-item p{color:var(--muted);font-size:14.5px}
.why-quote{background:linear-gradient(160deg,var(--navy),var(--navy-2));color:#fff;border-radius:20px;padding:40px 34px;position:relative;box-shadow:var(--shadow-lg)}
.quote-mark{font-size:80px;line-height:.6;color:var(--orange);font-family:Georgia,serif;height:30px;display:block}
.why-quote p{font-size:18px;line-height:1.7;margin:14px 0 18px}
.why-quote span{color:#9fb0c6;font-size:14px}

/* ===== 实施流程 ===== */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:step}
.step{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;text-align:center;position:relative;box-shadow:var(--shadow);transition:.28s}
.step:hover{transform:translateY(-5px);border-color:rgba(29,78,216,.35)}
.step-no{width:46px;height:46px;border-radius:50%;background:var(--orange);color:#fff;font-size:20px;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.step h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.step p{color:var(--muted);font-size:13.5px}

/* ===== 案例 ===== */
.case-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow);transition:.28s;border-top:4px solid var(--orange)}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.case-tag{display:inline-block;background:var(--bg-alt);color:var(--navy);font-size:13px;font-weight:600;padding:5px 12px;border-radius:8px;margin-bottom:16px}
.case-metric b{display:block;font-size:28px;color:var(--orange);font-weight:800;margin-bottom:12px}
.case-card p{color:var(--muted);font-size:14.5px}
.cases-more{margin-top:38px;text-align:center}

/* ===== 案例列表页 ===== */
.page-hero{background:linear-gradient(180deg,#ffffff,#eef2f7);padding:140px 0 60px;text-align:center;position:relative;overflow:hidden}
.page-hero h1{font-size:clamp(28px,4vw,44px);font-weight:800;color:var(--navy);letter-spacing:-.5px}
.page-hero h1 .hl{color:var(--orange)}
.page-hero p{margin-top:16px;color:var(--muted);font-size:16px;max-width:640px;margin-left:auto;margin-right:auto}
.case-detail{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px}
.case-detail span{font-size:12.5px;color:var(--muted);background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:4px 12px}
.pagination{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:44px}
.pagination[hidden]{display:none}
.page-btn{min-width:40px;height:40px;padding:0 14px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--navy);font-size:15px;font-weight:600;cursor:pointer;transition:.2s;font-family:inherit}
.page-btn:hover:not(:disabled){border-color:var(--orange);color:var(--orange)}
.page-btn.active{background:var(--orange);border-color:var(--orange);color:#fff}
.page-btn:disabled{opacity:.4;cursor:default}
.page-info{font-size:14px;color:var(--muted);margin-left:6px}

/* ===== FAQ ===== */
.faq-list{max-width:840px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--white);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:0;padding:20px 22px;font-size:16px;font-weight:600;color:var(--navy);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:14px}
.faq-plus{color:var(--orange);font-size:22px;font-weight:700;transition:.3s;flex:none}
.faq-item.open .faq-plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 22px 20px;color:var(--muted);font-size:15px}

/* ===== CTA ===== */
.cta{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:90px 0}
.cta-inner{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.cta-left h2{font-size:clamp(26px,3.4vw,38px);line-height:1.3;font-weight:800}
.cta-left>p{color:#c7d3e3;margin-top:16px;font-size:16px}
.cta-points{list-style:none;margin-top:24px;display:flex;flex-direction:column;gap:12px}
.cta-points li{color:#e3ebf5;font-size:15px}
.cta-form{background:var(--white);border-radius:20px;padding:30px;box-shadow:var(--shadow-lg);color:var(--text)}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--navy);margin-bottom:7px}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;color:var(--text);background:var(--bg);transition:.2s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--orange);background:#fff}
.form-tip{margin-top:14px;font-size:13px;color:var(--muted);text-align:center}

/* ===== 页脚 ===== */
.footer{background:var(--navy-2);color:#c7d3e3;padding:60px 0 0}
.footer-inner{display:grid;grid-template-columns:1.4fr 2fr;gap:40px;padding-bottom:40px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:14px;color:#9fb0c6;max-width:340px}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-cols h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-cols a,.footer-cols span{display:block;font-size:14px;color:#9fb0c6;margin-bottom:9px;transition:.2s}
.footer-cols a:hover{color:var(--orange)}
.footer-cols .muted{color:#7c8ba0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;font-size:13px}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer-bottom .muted{color:#7c8ba0}

/* ===== 滚动揭示动画 ===== */
.reveal{opacity:0;transform:translateY(28px);transition:.7s cubic-bezier(.2,.7,.3,1)}
.reveal.show{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .why-wrap{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .cta-inner{grid-template-columns:1fr;gap:36px}
}
@media(max-width:760px){
  .nav-links{position:fixed;top:72px;right:0;width:min(78vw,320px);height:calc(100vh - 72px);background:#fff;flex-direction:column;align-items:flex-start;gap:4px;padding:22px;box-shadow:var(--shadow-lg);transform:translateX(110%);transition:.3s;z-index:99}
  .nav-links.open{transform:translateX(0)}
  .nav-links a{padding:12px 4px;width:100%;border-bottom:1px solid var(--line);font-size:16px}
  .nav-links .btn-nav{margin-top:14px;text-align:center;width:100%}
  .nav-toggle{display:flex}
  .grid-3{grid-template-columns:1fr}
  .hero{padding:104px 0 64px}
  .slide{grid-template-columns:1fr;gap:8px}
  .slide-visual{display:none}
  .car-arrow{display:none}
  .car-dots{margin-top:24px}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:repeat(2,1fr)}
  .section{padding:64px 0}
}
@media(max-width:430px){
  .grid-4{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
}