/* ===== 云服天纪官网原型 公共样式 ===== */
:root{
  --navy:#0b1f3a;
  --navy2:#102a54;
  --blue:#1565c0;
  --blue-d:#0d3c7a;
  --cyan:#00c2d1;
  --cyan-d:#00a3b0;
  --light:#f4f8fd;
  --gray:#5b6b7e;
  --line:#e2e9f1;
  --text:#1f2d3d;
  --white:#fff;
  --shadow:0 8px 28px rgba(16,42,84,.10);
  --radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{  
  font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
  color:var(--text);background:var(--white);line-height:1.7;font-size:15px;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
section{padding:72px 0}
.section-title{text-align:center;margin-bottom:14px}
.section-title h2{font-size:30px;color:var(--navy);position:relative;display:inline-block;padding-bottom:14px}
.section-title h2::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:54px;height:4px;background:linear-gradient(90deg,var(--blue),var(--cyan));border-radius:3px}
.section-title p{color:var(--gray);margin-top:12px;font-size:15px}
.btn{display:inline-block;padding:12px 30px;border-radius:30px;font-size:15px;font-weight:600;transition:.25s;cursor:pointer;border:0}
.btn-primary{background:linear-gradient(90deg,var(--blue),var(--cyan));color:#fff;box-shadow:0 6px 18px rgba(21,101,192,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(21,101,192,.4)}
.btn-ghost{background:transparent;color:var(--navy);border:2px solid var(--line)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}

/* ===== 顶部导航 ===== */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--navy)}
.logo img{height:52px;width:auto;max-width:100%;object-fit:contain}
.logo .mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--blue),var(--cyan));display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:800}
.logo small{display:block;font-size:11px;color:var(--gray);font-weight:400;letter-spacing:1px}
.nav-links{display:flex;gap:30px;list-style:none}
.nav-links a{font-size:15px;color:var(--text);font-weight:500;position:relative;padding:6px 0}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--cyan);transition:.25s}
.nav-links a:hover,.nav-links a.active{color:var(--blue)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer}
.nav-toggle span{width:26px;height:3px;background:var(--navy);border-radius:2px;transition:.3s}

/* ===== Hero ===== */
.hero{position:relative;background:radial-gradient(1200px 600px at 80% -10%,rgba(0,194,209,.25),transparent),linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:40px 40px;opacity:.5}
.hero .container{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:90px 20px}
.hero h1{font-size:44px;line-height:1.25;margin-bottom:18px}
.hero h1 .hl{background:linear-gradient(90deg,var(--cyan),#7fe9f2);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.lead{font-size:17px;color:#cfe0f5;margin-bottom:30px;max-width:540px}
.hero .actions{display:flex;gap:16px;flex-wrap:wrap}
.hero .actions .btn-ghost{color:#fff;border-color:rgba(255,255,255,.4)}
.hero .actions .btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.hero-visual{position:relative;height:340px}
.shield{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:230px;height:230px;border-radius:50%;background:linear-gradient(135deg,rgba(0,194,209,.35),rgba(21,101,192,.35));border:2px solid rgba(0,194,209,.6);display:flex;align-items:center;justify-content:center;box-shadow:0 0 60px rgba(0,194,209,.4);animation:pulse 3s infinite}
.shield span{font-size:80px}
@keyframes pulse{0%,100%{box-shadow:0 0 40px rgba(0,194,209,.35)}50%{box-shadow:0 0 70px rgba(0,194,209,.6)}}
.orbit{position:absolute;top:50%;left:50%;width:300px;height:300px;border:1px dashed rgba(0,194,209,.5);border-radius:50%;transform:translate(-50%,-50%);animation:spin 18s linear infinite}
.orbit::after{content:"🔒";position:absolute;top:-14px;left:50%;transform:translateX(-50%);font-size:20px}
@keyframes spin{to{transform:translate(-50%,-50%) rotate(360deg)}}

/* ===== 数据条 ===== */
.stats{background:var(--navy);color:#fff}
.stats .container{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat .num{font-size:40px;font-weight:800;background:linear-gradient(90deg,var(--cyan),#9ff0f7);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat .lab{color:#bcd0e8;font-size:14px;margin-top:4px}

/* ===== 卡片通用 ===== */
.grid{display:grid;gap:24px}
.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:28px;transition:.28s;box-shadow:0 2px 10px rgba(16,42,84,.04)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(0,194,209,.5)}
.card .ico{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--blue),var(--cyan));display:flex;align-items:center;justify-content:center;font-size:26px;color:#fff;margin-bottom:16px}
.card h3{font-size:18px;color:var(--navy);margin-bottom:10px}
.card p{color:var(--gray);font-size:14px}
.card ul{list-style:none;margin-top:10px}
.card ul li{padding-left:18px;position:relative;color:var(--gray);font-size:14px;margin-bottom:6px}
.card ul li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:var(--cyan)}

/* ===== 解决方案领域 ===== */
.domains{background:var(--light)}
.domain{position:relative;overflow:hidden;border-radius:var(--radius);min-height:200px;padding:30px;color:#fff;display:flex;flex-direction:column;justify-content:flex-end;background:linear-gradient(135deg,var(--blue-d),var(--navy))}
.domain::after{content:"";position:absolute;right:-30px;top:-30px;width:120px;height:120px;border-radius:50%;background:rgba(0,194,209,.25)}
.domain .tag{font-size:13px;opacity:.8}
.domain h3{font-size:21px;margin:6px 0 8px;position:relative;z-index:1}
.domain p{font-size:13px;opacity:.9;position:relative;z-index:1}

/* ===== 案例 ===== */
.case-card{border-left:4px solid var(--cyan)}
.case-card .meta{font-size:13px;color:var(--cyan-d);font-weight:600;margin-bottom:6px}
.case-card h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.case-card .amt{display:inline-block;background:var(--light);color:var(--blue);padding:3px 12px;border-radius:20px;font-size:13px;font-weight:600;margin-top:6px}

/* ===== 关于页时间线 ===== */
.timeline{position:relative;padding-left:30px;margin-top:20px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--line)}
.timeline li{list-style:none;position:relative;margin-bottom:26px}
.timeline li::before{content:"";position:absolute;left:-26px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--cyan);border:3px solid #fff;box-shadow:0 0 0 2px var(--cyan)}
.timeline .yr{font-weight:700;color:var(--blue);font-size:16px}
.timeline p{color:var(--gray);font-size:14px}

/* ===== 产品页标签 ===== */
.tabs{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:34px}
.tab{padding:10px 24px;border:1px solid var(--line);border-radius:30px;cursor:pointer;font-weight:600;color:var(--gray);transition:.25s;background:#fff}
.tab.active,.tab:hover{background:linear-gradient(90deg,var(--blue),var(--cyan));color:#fff;border-color:transparent}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:fade .4s}
@keyframes fade{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ===== 联系页 ===== */
.contact-wrap{display:block;grid-template-columns:1fr 1fr;gap:-20px}
.info-box{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;border-radius:var(--radius);padding:36px}
.info-box h3{margin-bottom:20px;font-size:20px}
.info-box .row{display:flex;gap:12px;margin-bottom:30px;align-items:flex-start}
.info-box .row .ic{font-size:30px}
.info-box .row div span{display:block;font-size:13px;color:#9fb8d6}
.info-box .row div b{font-weight:600;font-size:18px}
.form-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px}
.form-box h3{margin-bottom:20px;font-size:20px;color:var(--navy)}
.field{margin-bottom:px}
.field label{display:block;font-size:px;color:var(--gray);margin-bottom:6px}
.field input,.field textarea{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-family:inherit;outline:none;transition:.2s}
.field input:focus,.field textarea:focus{border-color:var(--cyan)}
.field textarea{resize:vertical;min-height:110px}
.form-note{font-size:13px;color:var(--gray);margin-top:6px}

/* ===== 页脚 ===== */
.footer{background:var(--navy);color:#c6d6ea;padding:54px 0 26px}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer a{color:#c6d6ea;font-size:14px;display:block;margin-bottom:9px}
.footer a:hover{color:var(--cyan)}
.footer .about{font-size:14px;line-height:1.8}
.footer .copy{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:20px;text-align:center;font-size:13px;color:#8aa2c2}

/* ===== 面包屑 / 二级页 ===== */
.breadcrumb{background:var(--light);border-bottom:1px solid var(--line);padding:14px 0;font-size:14px;color:var(--gray)}
.breadcrumb a{color:var(--gray)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb .sep{margin:0 9px;color:#c2cdda}
.breadcrumb .cur{color:var(--blue);font-weight:600}
.subhero{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff}
.subhero .container{padding:64px 20px}
.subhero h1{font-size:34px;margin-bottom:12px}
.subhero p.lead{color:#cfe0f5;font-size:16px;max-width:660px}
.subhero .tags{margin-top:18px;display:flex;gap:10px;flex-wrap:wrap}
.subhero .tags span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);padding:5px 14px;border-radius:20px;font-size:13px}
.more-link{display:inline-flex;align-items:center;gap:6px;color:var(--blue);font-weight:600;margin-top:18px;font-size:15px}
.more-link:hover{gap:10px}
.feature-list{list-style:none;margin-top:14px}
.feature-list li{padding-left:22px;position:relative;color:var(--gray);font-size:14px;margin-bottom:10px}
.feature-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--cyan);font-weight:700}

/* ===== 返回顶部 ===== */
.totop{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer;opacity:0;pointer-events:none;transition:.3s;box-shadow:var(--shadow);z-index:90}
.totop.show{opacity:1;pointer-events:auto}

/* ===== 响应式 ===== */
@media(max-width:980px){
  .hero .container{grid-template-columns:1fr;padding:70px 20px}
  .hero-visual{height:240px;order:-1}
  .hero h1{font-size:34px}
  .stats .container{grid-template-columns:repeat(2,1fr);gap:30px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr 1fr}
  .contact-wrap{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .nav-links{position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:0 20px;max-height:0;overflow:hidden;transition:.3s;box-shadow:var(--shadow);border-bottom:1px solid var(--line)}
  .nav-links.open{max-height:340px;padding:10px 20px}
  .nav-links li{padding:12px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:flex}
  .hero h1{font-size:28px}
  .section-title h2{font-size:24px}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .stats .container{grid-template-columns:1fr 1fr;gap:24px}
  .footer .cols{grid-template-columns:1fr}
  section{padding:52px 0}
}