*{margin:0;padding:0;box-sizing:border-box;font-family:"Microsoft YaHei",system-ui,sans-serif;}
:root{
    --primary:#1677ff;
    --primary-light:#e6f0ff;
    --text-dark:#111827;
    --text-gray:#64748b;
    --border:#e2e8f0;
    --bg-light:#f8faff;
    --white:#ffffff;
    --radius:10px;
    --shadow-sm:0 3px 15px rgba(22,119,255,0.05);
    --shadow-hover:0 12px 32px rgba(22,119,255,0.11);
    --blue-gradient:#1677ff;
    --blue-primary:#1677ff;
}
body{background:var(--white);color:var(--text-dark);line-height:1.8;}
.container{max-width:1440px;margin:0 auto;padding:0 32px;}
/* 头部导航 */
.header {
  position:fixed;top:0;left:0;width:100%;z-index:999;padding:20px 0;transition:var(--trans);
  backdrop-filter: blur(8px);
  background:rgba(255,255,255,0.72);
}
.header.fixed {
  background:rgba(255,255,255,0.94);
  box-shadow:var(--shadow-sm);
  padding:14px 0;
  backdrop-filter: blur(12px);
}
.nav-wrap {display:flex;align-items:center;justify-content:space-between;margin:20px auto;}
.logo {display:flex;align-items:center;gap:12px;font-size:25px;font-weight:700;color:var(--text-dark)}
.logo i {
  color:var(--blue-primary);font-size:28px;
  filter: drop-shadow(0 3px 6px rgba(0,110,255,0.2));
}
.nav-menu {display:flex;gap:36px}
.nav-item {
  font-size:15px;color:var(--text-gray);transition:var(--trans);
  position:relative;padding:5px 0;
  text-decoration: none;
}
.nav-item.active,.nav-item:hover {color:var(--blue-primary)}
.nav-item.active::after {
  content:"";position:absolute;bottom:0;left:0;width:100%;height:2px;
  background:var(--blue-gradient);border-radius:2px
}
.nav-btn-group {display:flex;gap:18px}

/* 按钮通用样式 */
.btn {
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 30px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:500;transition:var(--trans);
  position:relative;overflow:hidden;letter-spacing:0.5px;
  border:none;
  cursor:pointer;
}
.btn-lg {padding:16px 40px;font-size:17px}
.btn-primary {
  background:var(--blue-gradient);color:#fff;
  box-shadow:var(--shadow-sm);
}
.btn-primary:hover {
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
}
.btn-outline {
  background:transparent;border:1px solid var(--blue-primary);color:var(--blue-primary);
}
button.btn-outline{
    padding: 15px;
}
.btn-outline:hover {
  background:var(--blue-gradient);color:#fff;
  box-shadow:var(--shadow-sm);transform:translateY(-2px);
}
.btn-light {
  background:#fff;border:1px solid var(--border-thin);color:var(--blue-primary);
  box-shadow:var(--shadow-xs);
}
.btn-light:hover {
  background:var(--blue-light-gradient);
  border-color:var(--blue-primary);
  transform:translateY(-2px);
  box-shadow:var(--shadow-sm);
}

/* 移动端导航样式 */
.mobile-hamburger{
  display: none;
  font-size: 24px;
  cursor: pointer;
}
.mobile-nav{
  display: none;
  width: 100%;
  flex-direction: column;
  gap:16px;
  padding:20px;
  background:#fff;
  border-top:1px solid #eee;
}
.mobile-nav.show{
  display: flex;
}
.mobile-nav .nav-item{
  width:100%;
  padding:10px 0;
  border-bottom:1px dashed #eee;
}
.mobile-btn-group{
  display:flex;
  gap:12px;
  margin-top:16px;
}

/* 移动端适配 */
@media screen and (max-width:768px) {
  .pc-menu,.pc-btn{
    display: none !important;
  }
  .mobile-hamburger{
    display: block;
  }
  .nav-wrap{
    display:flex;
    align-items:center;
    justify-content: space-between;
  }
  .header{
    flex-direction: column;
  }
}
/* 顶部浅蓝Banner 保持原有浅色系 */
.page-banner{
    background:linear-gradient(130deg,#f0f7ff,#e8f2ff);
    padding:96px 24px;
    text-align:center;
}
.page-banner h1{
    font-size:46px;
    color:var(--text-dark);
    font-weight:600;
    margin-bottom:18px;
    letter-spacing:1px;
}
.page-banner p{
    font-size:20px;
    color:#000000;
    max-width:1100px;
    margin:0 auto 40px;
    line-height:1.9;
}
.badge-group{
    display:flex;
    flex-wrap:wrap;
    gap:16px;
    justify-content:center;
    margin-bottom:48px;
}
.badge-item{
    padding:10px 26px;
    background:var(--white);
    border:1px solid var(--border);
    border-radius:999px;
    font-size:15px;
    color:var(--primary);
}
.btn-group{
    display:flex;
    gap:20px;
    justify-content:center;
    flex-wrap:wrap;
}
.btn-main{
    padding:16px 42px;
    background:var(--primary);
    color:#fff;
    border:none;
    border-radius:var(--radius);
    font-size:17px;
    font-weight:500;
    cursor:pointer;
    transition:0.28s;
}
.btn-main:hover{opacity:0.93;box-shadow:var(--shadow-hover);transform:translateY(-2px);}

.btn-outline:hover{background:var(--primary-light);transform:translateY(-2px);}

/* 通用区块超大间距 */
.section{padding:86px 0;}
.section-bg{background:var(--bg-light);}
.section-title{text-align:center;margin-bottom:64px;}
.section-title h2{
    font-size:34px;
    color:var(--primary);
    font-weight:500;
    margin-bottom:12px;
}
.section-title .split-line{
    width:72px;
    height:4px;
    background:var(--primary);
    margin:0 auto 16px;
    border-radius:3px;
}
.section-title p{color:var(--text-gray);max-width:900px;margin:0 auto;font-size:16px;}

/* 机房板块：浅底统一，强制等高，解决错位，和上方风格完全配套 */
.idc-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:36px;
    align-items: stretch; /* 核心：强制所有卡片等高，消除高低错位 */
}
.idc-card{
    background:linear-gradient(145deg,#ffffff,#f5f9ff);
    border:1px solid rgba(22,119,255,0.12);
    border-radius:var(--radius);
    overflow:hidden;
    transition:0.35s ease;
    display:flex;
    flex-direction:column;
}
/* 顶部统一蓝条，和页面主色呼应 */
.idc-card::before{
    content:"";
    width:100%;
    height:6px;
    background:linear-gradient(90deg,#1677ff,#63a8ff);
}
.idc-card:hover{
    border-color:rgba(22,119,255,0.3);
    transform:translateY(-8px);
    box-shadow:0 16px 40px rgba(22,119,255,0.16);
}
.idc-inner{
    padding:36px;
    flex:1;
    display:flex;
    flex-direction:column;
}
/* 顶部标签行 */
.idc-top-tag{
    display:inline-block;
    padding:5px 12px;
    background:var(--primary-light);
    color:var(--primary);
    font-size:13px;
    border-radius:4px;
    margin-bottom:20px;
}
/* 标题带图标 */
.idc-card h3{
    font-size:22px;
    color:var(--text-dark);
    margin-bottom:16px;
    font-weight:600;
    display:flex;
    align-items:center;
    gap:10px;
}
.idc-card h3::before{
    content:"🖥";
    font-size:24px;
    color:var(--primary);
    width:40px;
    height:40px;
    background:var(--primary-light);
    border-radius:8px;
    display:flex;
    align-items:center;
    justify-content:center;
}
.idc-desc{
    font-size:15px;
    color:var(--text-gray);
    line-height:1.85;
    flex-grow:1;
    margin-bottom:24px;
}
/* 底部标签组 和页面顶部标签样式统一 */
.idc-tag-group{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
}
.idc-bottom-tag{
    padding:5px 12px;
    background:var(--primary-light);
    color:var(--primary);
    font-size:13px;
    border-radius:4px;
}

/* 其余板块样式不变，省略重复代码 */
.adv-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:30px;
}
.adv-card{
    background:var(--white);
    border:1px solid var(--border);
    border-radius:var(--radius);
    padding:40px 30px;
    text-align:center;
    transition:0.32s;
}
.adv-card:hover{border-color:var(--primary);box-shadow:var(--shadow-hover);transform:translateY(-6px);}
.adv-icon{
    width:56px;height:56px;
    margin:0 auto 22px;
    background:var(--primary-light);
    border-radius:10px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:28px;
    color:var(--primary);
}
.adv-card h4{font-size:20px;margin-bottom:12px;color:var(--text-dark);font-weight:500;}
.adv-card p{font-size:15px;color:var(--text-gray);line-height:1.8;}

.defense-wrap{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:32px;
}
.defense-box{
    background:var(--white);
    border:1px solid var(--border);
    border-left:5px solid var(--primary);
    border-radius:var(--radius);
    padding:40px;
}
.defense-box h4{font-size:24px;color:var(--text-dark);margin-bottom:24px;font-weight:500;}
.defense-box ul{list-style:none;}
.defense-box li{
    font-size:15px;
    color:var(--text-gray);
    padding:11px 0;
    padding-left:26px;
    position:relative;
}
.defense-box li::before{
    content:"•";
    color:var(--primary);
    position:absolute;
    left:0;
    font-weight:bold;
    font-size:18px;
}

.biz-tag-group{
    display:flex;
    flex-wrap:wrap;
    gap:20px;
    justify-content:center;
}
.biz-tag{
    background:var(--primary-light);
    color:var(--primary);
    padding:14px 32px;
    border-radius:999px;
    font-size:16px;
    transition:0.28s;
}
.biz-tag:hover{background:var(--primary);color:#fff;}

.faq-container{
    background:var(--white);
    border:1px solid var(--border);
    border-radius:var(--radius);
    padding:48px;
}
.faq-item{
    border-bottom:1px dashed var(--border);
    padding:26px 0;
}
.faq-item:last-child{border-bottom:none;}
.faq-q{font-size:18px;font-weight:500;color:var(--text-dark);margin-bottom:10px;}
.faq-a{font-size:15px;color:var(--text-gray);line-height:1.85;}

.cta-footer{
    background:linear-gradient(130deg,#e8f2ff,#f0f7ff);
    padding:90px 24px;
    text-align:center;
}
.cta-footer h2{font-size:40px;color:var(--text-dark);margin-bottom:16px;}
.cta-footer p{font-size:19px;color:var(--text-gray);margin-bottom:36px;max-width:1000px;margin-left:auto;margin-right:auto;}
.contact-row{
    display:flex;
    gap:36px;
    justify-content:center;
    flex-wrap:wrap;
    margin-top:42px;
}
.contact-card{
    background:var(--white);
    border:1px solid var(--border);
    border-radius:var(--radius);
    padding:24px 40px;
    min-width:200px;
}
.contact-card .tip{font-size:14px;color:var(--text-gray);margin-bottom:6px;}
.contact-card .info{font-size:20px;font-weight:600;color:var(--primary);}

/* 移动端适配 */
@media(max-width:1200px){
    .idc-grid,.adv-grid{grid-template-columns:repeat(2,1fr);}
    .defense-wrap{grid-template-columns:1fr;}
}
@media(max-width:768px){
    .page-banner h1{font-size:32px;}
    .section-title h2{font-size:26px;}
    .cta-footer h2{font-size:30px;}
    .idc-grid,.adv-grid{grid-template-columns:1fr;}
    .btn-group{flex-direction:column;align-items:center;}
    .container{padding:0 20px;}
}