/* ====== 基础变量 ====== */
:root{
  --blue:#0a6ed1;
  --blue-dark:#084c8c;
  --cyan:#00b4d8;
  --ink:#0d1b2a;
  --slate:#475569;
  --muted:#7c8aa0;
  --bg:#ffffff;
  --bg-alt:#f4f8fc;
  --line:#e2eaf2;
  --radius:14px;
  --shadow:0 10px 30px rgba(10,110,209,.10);
  --maxw:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);line-height:1.7;background:var(--bg);
}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* ====== 头部导航 ====== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:108px}
.brand{display:flex;flex-direction:row;align-items:center;gap:12px;line-height:1.2}
.brand-logo{height:72px;width:auto;display:block;border-radius:6px}
.brand-name{font-size:32px;font-weight:800;color:var(--blue);letter-spacing:2px;line-height:1.2}
.main-nav{display:flex;align-items:center;gap:22px}
.main-nav a{font-size:15px;color:var(--slate);font-weight:500}
.main-nav a:hover{color:var(--blue)}
.nav-cta{
  background:var(--blue);color:#fff!important;padding:8px 16px;border-radius:999px;font-weight:600;
}
.nav-cta:hover{background:var(--blue-dark)}
.nav-toggle{display:none;background:none;border:0;font-size:24px;color:var(--blue);cursor:pointer}

/* ====== Hero ====== */
.hero{
  background:linear-gradient(135deg,var(--blue) 0%,var(--cyan) 100%);
  color:#fff;padding:72px 0 64px;
}
.hero-inner{display:grid;grid-template-columns:1.3fr .9fr;gap:40px;align-items:center}
.hero-eyebrow{
  display:inline-block;background:rgba(255,255,255,.18);padding:6px 14px;border-radius:999px;
  font-size:14px;font-weight:600;margin-bottom:18px;
}
.hero-text h1{font-size:40px;line-height:1.25;font-weight:800;margin-bottom:18px}
.hero-lead{font-size:17px;color:rgba(255,255,255,.92);margin-bottom:26px}
.hero-lead strong{color:#fff;font-weight:700}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{padding:12px 24px;border-radius:999px;font-weight:700;font-size:15px;cursor:pointer;border:0;display:inline-block;transition:.2s}
.btn-primary{background:#fff;color:var(--blue)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.15)}
.btn-ghost{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.12)}
.hero-stats{
  list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px;
}
.hero-stats li{
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
  border-radius:var(--radius);padding:18px;text-align:center;
}
.hero-stats strong{display:block;font-size:26px;font-weight:800}
.hero-stats span{font-size:13px;color:rgba(255,255,255,.85)}

/* ====== Hero 图片 ====== */
.hero-right{display:flex;flex-direction:column;gap:16px}
.hero-img{
  width:100%;border-radius:var(--radius);
  box-shadow:0 12px 36px rgba(0,0,0,.25);
  border:2px solid rgba(255,255,255,.3);
}

/* ====== 通用区块 ====== */
.section{padding:68px 0}
.section-alt{background:var(--bg-alt)}
.section-eyebrow{color:var(--blue);font-weight:700;letter-spacing:1px;font-size:14px;margin-bottom:8px}
.section-title{font-size:30px;font-weight:800;margin-bottom:28px;color:var(--ink)}
.section-eyebrow.light,.section-title.light{color:#fff}

/* ====== 关于 ====== */
.about-grid{display:grid;grid-template-columns:1.4fr .9fr;gap:36px;align-items:center;margin-bottom:30px}
.about-main p{margin-bottom:16px;font-size:16px;color:var(--slate)}
.about-main strong{color:var(--ink)}
.about-points{
  list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:0;padding:0;
  background:linear-gradient(135deg,#f0f7ff 0%,#e6f4ff 100%);
  border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;
}
.about-points li{
  background:#fff;border:1px solid var(--line);border-radius:8px;
  padding:14px 16px;font-size:14px;color:var(--ink);box-shadow:0 2px 6px rgba(15,42,84,.04);
  transition:transform .2s ease, box-shadow .2s ease;
}
.about-points li:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.about-side{display:flex;flex-direction:column;gap:16px}
.about-img{
  width:100%;border-radius:var(--radius);box-shadow:var(--shadow);
  border:1px solid var(--line);
}

/* ====== 服务卡片 ====== */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);transition:.2s
}
.card:hover{transform:translateY(-4px);border-color:var(--blue)}
.card h3{font-size:19px;margin-bottom:10px;color:var(--blue-dark)}
.card p{color:var(--slate);font-size:15px}

/* ====== 对标优势 ====== */
.advantage-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.advantage-col{
  background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius);padding:26px
}
.advantage-col h3{font-size:20px;color:var(--blue-dark);margin-bottom:14px}
.advantage-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.advantage-col li{padding-left:22px;position:relative;color:var(--slate);font-size:15px}
.advantage-col li::before{content:"▸";position:absolute;left:0;color:var(--cyan);font-weight:700}
.advantage-note{
  margin-top:24px;background:#eaf4ff;border-left:4px solid var(--blue);
  padding:16px 20px;border-radius:8px;color:var(--slate);font-size:15px
}

/* ====== 横幅图片 ====== */
.advantage-banner,.digital-banner{
  margin-top:28px;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);border:1px solid var(--line);
}
.advantage-banner img,.digital-banner img{
  width:100%;display:block;transition:transform .4s ease;
}
.advantage-banner:hover img,.digital-banner:hover img{transform:scale(1.03)}

/* ====== 服务区域 ====== */
.coverage-lead{color:var(--slate);font-size:16px;margin-bottom:20px}
.tags{display:flex;flex-wrap:wrap;gap:12px}
.tags span{
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:10px 18px;font-size:15px;color:var(--ink);box-shadow:var(--shadow)
}

/* ====== 服务区域大区分布 ====== */
.region-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:8px;
}
.region-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;
  transition:transform .25s ease, box-shadow .25s ease;
}
.region-item:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(15,42,84,.1)}
.region-tag{
  display:block;background:var(--blue);color:#fff;font-weight:700;font-size:18px;
  padding:12px 20px;text-align:center;letter-spacing:2px;
}
.region-list{
  display:block;font-size:16px;color:var(--ink);font-weight:500;
  padding:16px 20px;line-height:1.8;text-align:center;letter-spacing:1px;
}
@media (max-width:900px){.region-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.region-grid{grid-template-columns:1fr}}

/* ====== FAQ ====== */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:0;overflow:hidden
}
.faq-item summary{
  cursor:pointer;padding:18px 20px;font-weight:700;font-size:16px;list-style:none;
  display:flex;justify-content:space-between;align-items:center;color:var(--ink)
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--blue);font-weight:700}
.faq-item[open] summary::after{content:"−"}
.faq-item p{padding:0 20px 18px;color:var(--slate);font-size:15px}

/* ====== 联系 ====== */
.section-contact{background:linear-gradient(135deg,var(--blue-dark),var(--blue))}
.contact-inner{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;color:#fff}
.contact-text .section-title{color:#fff}
.contact-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.contact-list li{display:flex;justify-content:space-between;gap:16px;border-bottom:1px solid rgba(255,255,255,.2);padding-bottom:10px}
.contact-list span{color:rgba(255,255,255,.8);font-size:14px}
.contact-list strong{font-size:16px;text-align:right}
.contact-list a{color:#fff;text-decoration:underline}
.contact-form{
  background:#fff;border-radius:var(--radius);padding:26px;color:var(--ink);box-shadow:var(--shadow)
}
.contact-form h3{font-size:19px;margin-bottom:16px;color:var(--blue-dark)}
.contact-form label{display:block;font-size:14px;color:var(--slate);margin-bottom:14px}
.contact-form input,.contact-form textarea{
  width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;
  font-size:15px;font-family:inherit;resize:vertical
}
.contact-form .btn{width:100%;background:var(--blue);color:#fff}
.contact-form .btn:hover{background:var(--blue-dark)}
.form-tip{font-size:12px;color:var(--muted);margin-top:10px}

/* ====== 页脚 ====== */
.site-footer{background:var(--ink);color:#cdd7e3;padding:40px 0 24px}

/* ====== 客户痛点 ====== */
.pain-title{margin-bottom:14px;position:relative;display:inline-block}
.pain-title::after{
  content:"";position:absolute;left:50%;bottom:-10px;transform:translateX(-50%);
  width:60%;height:6px;background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  border-radius:3px;
}
.pain-subtitle{text-align:center;color:var(--slate);font-size:18px;margin-bottom:36px;font-weight:500}
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.pain-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);text-align:center;
  transition:transform .25s ease, box-shadow .25s ease;
}
.pain-card:hover{transform:translateY(-4px);box-shadow:0 10px 28px rgba(15,42,84,.12)}
.pain-card h3{
  background:linear-gradient(135deg,var(--blue) 0%,var(--cyan) 100%);
  color:#fff;margin:0;padding:18px 12px;font-size:20px;font-weight:700;
}
.pain-card p{color:var(--slate);font-size:15px;padding:18px 16px;margin:0;min-height:74px;line-height:1.7}
.pain-btn{
  display:inline-block;margin:0 0 22px;padding:8px 28px;border-radius:999px;
  background:linear-gradient(135deg,var(--blue) 0%,var(--cyan) 100%);
  color:#fff!important;font-weight:600;font-size:15px;transition:opacity .2s;
}
.pain-btn:hover{opacity:.9}
@media (max-width:900px){.pain-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.pain-grid{grid-template-columns:1fr}}
.footer-inner{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;margin-bottom:18px}
.footer-brand{font-weight:700;color:#fff;font-size:16px;margin-top:14px}
.footer-meta{font-size:14px;color:#9fb0c3;margin-top:6px}
.footer-logo{height:48px;width:auto;display:block;background:#fff;border-radius:8px;padding:6px}
.footer-contact p{font-size:14px;margin-bottom:4px}
.footer-contact a{color:var(--cyan)}
.footer-copy{text-align:center;font-size:13px;color:#7e8ea3;border-top:1px solid #1d2c3d;padding-top:16px}

/* ====== 响应式 ====== */
@media (max-width:900px){
  .hero-inner,.about-grid,.advantage-grid,.contact-inner{grid-template-columns:1fr}
  .about-points{grid-template-columns:repeat(2,1fr)}
  .card-grid{grid-template-columns:1fr 1fr}
  .hero-text h1{font-size:32px}
}
@media (max-width:640px){
  .main-nav{
    position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;gap:0;
    border-bottom:1px solid var(--line);display:none
  }
  .main-nav.open{display:flex}
  .main-nav a{padding:14px 20px;width:100%;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .card-grid{grid-template-columns:1fr}
  .hero-text h1{font-size:27px}
  .section-title{font-size:24px}
  .hero-stats{grid-template-columns:1fr 1fr}
}
#year{display:inline}