/* ============================================================
   大时代信息科技 — 现代多页站 2026 改版
   设计语言: 深色科技风 + 渐变主色 + 卡片化布局 + 大留白
   主色: #1677FF(蓝) 渐变辅: #722ED1(紫) 强调: #13C2C2(青)
   ============================================================ */
:root{
  --blue:#1677FF; --blue2:#4096FF; --purple:#722ED1; --cyan:#13C2C2;
  --ink:#0F1722; --ink2:#1B2735; --gray:#64748B; --line:#E5EAF1;
  --bg:#F6F8FB; --white:#FFFFFF;
  --radius:16px; --shadow:0 8px 32px rgba(15,23,34,.08);
  --grad:linear-gradient(120deg,#1677FF 0%,#722ED1 100%);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}

/* ---------- 顶栏 ---------- */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
.brand .logo{width:34px;height:34px;border-radius:9px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:800}
.brand small{font-weight:500;color:var(--gray);font-size:12px;margin-left:2px}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{padding:8px 15px;border-radius:9px;font-size:15px;color:#334155;font-weight:500;transition:.2s}
.nav-links a:hover{background:#EEF4FF;color:var(--blue)}
.nav-links a.active{color:var(--blue);font-weight:700}
.nav-cta{background:var(--grad);color:#fff!important;padding:9px 20px!important;border-radius:10px;font-weight:600}
.nav-cta:hover{opacity:.92}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:96px 0 110px}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(600px 300px at 15% 20%,rgba(22,119,255,.35),transparent 60%),
  radial-gradient(500px 300px at 85% 30%,rgba(114,46,209,.30),transparent 60%),
  radial-gradient(400px 260px at 60% 90%,rgba(19,194,194,.18),transparent 60%)}
.hero .wrap{position:relative;z-index:2}
.hero .tag{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:#9DC8FF;border:1px solid rgba(157,200,255,.35);padding:6px 16px;border-radius:99px;margin-bottom:26px}
.hero h1{font-size:46px;line-height:1.25;font-weight:800;letter-spacing:.5px;max-width:720px}
.hero h1 .grad{background:linear-gradient(90deg,#69B4FF,#B388FF,#5EEAD4);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{margin-top:22px;font-size:17.5px;color:#B9C4D6;max-width:640px}
.hero .actions{margin-top:38px;display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 30px;border-radius:12px;font-size:16px;font-weight:600;transition:.22s}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 6px 24px rgba(22,119,255,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(22,119,255,.45)}
.btn-ghost{border:1px solid rgba(255,255,255,.3);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.hero-stats{display:flex;gap:56px;margin-top:60px;flex-wrap:wrap}
.hero-stats .num{font-size:36px;font-weight:800;background:linear-gradient(90deg,#69B4FF,#B388FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats .lbl{font-size:13.5px;color:#8FA0B8;margin-top:2px}

/* ---------- 通用 section ---------- */
.section{padding:88px 0}
.section.gray{background:#fff}
.sec-head{text-align:center;margin-bottom:56px}
.sec-head .kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--blue);background:#EAF2FF;padding:5px 16px;border-radius:99px;margin-bottom:16px}
.sec-head h2{font-size:34px;font-weight:800;letter-spacing:.5px}
.sec-head p{color:var(--gray);margin-top:12px;font-size:16px}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:1fr 1fr}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;transition:.25s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#C9D9FF}
.card .icon{width:52px;height:52px;border-radius:13px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:20px}
.card h3{font-size:20px;font-weight:700;margin-bottom:12px}
.card p{color:var(--gray);font-size:15px}
.card ul{margin-top:16px;list-style:none}
.card ul li{padding:7px 0 7px 26px;position:relative;color:#42536B;font-size:14.5px}
.card ul li::before{content:"✓";position:absolute;left:0;color:var(--blue);font-weight:800}
.card .link-more{display:inline-block;margin-top:18px;color:var(--blue);font-weight:600;font-size:14.5px}
.card .link-more:hover{text-decoration:underline}

/* ---------- 服务详情页 ---------- */
.page-hero{background:var(--ink);color:#fff;padding:72px 0;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(500px 260px at 80% 30%,rgba(114,46,209,.3),transparent 60%),radial-gradient(500px 260px at 10% 70%,rgba(22,119,255,.28),transparent 60%)}
.page-hero .wrap{position:relative;z-index:2}
.page-hero .crumb{font-size:13.5px;color:#8FA0B8;margin-bottom:18px}
.page-hero .crumb a{color:#9DC8FF}
.page-hero h1{font-size:38px;font-weight:800}
.page-hero p{margin-top:14px;color:#B9C4D6;font-size:16.5px;max-width:660px}
.content-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:38px 36px;margin-bottom:22px}
.content-block h2{font-size:23px;font-weight:800;margin-bottom:18px;padding-left:14px;border-left:4px solid var(--blue)}
.content-block h3{font-size:17.5px;font-weight:700;margin:20px 0 8px}
.content-block p{color:#42536B;font-size:15.5px;margin-bottom:10px}
.content-block ul{margin:10px 0 0 4px;list-style:none}
.content-block ul li{padding:6px 0 6px 26px;position:relative;color:#42536B}
.content-block ul li::before{content:"▸";position:absolute;left:4px;color:var(--blue)}
.specs-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:20px 0}
.specs-card{background:#F6F9FF;border:1px solid #E1EBFF;border-radius:12px;padding:20px;text-align:center}
.specs-value{font-size:21px;font-weight:800;color:var(--blue)}
.specs-label{font-size:12.5px;color:var(--gray);margin-top:4px}

/* ---------- 案例 ---------- */
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.case-head{padding:26px 28px 0;display:flex;justify-content:space-between;align-items:center}
.case-industry{font-size:12.5px;font-weight:700;color:var(--purple);background:#F4EDFF;padding:4px 12px;border-radius:99px}
.case-body{padding:20px 28px 26px}
.case-body h3{font-size:18.5px;font-weight:700;margin-bottom:10px}
.case-body p{color:var(--gray);font-size:14.5px}
.case-metrics{display:flex;gap:14px;margin-top:18px;flex-wrap:wrap}
.metric{flex:1;min-width:120px;background:#F6F9FF;border-radius:10px;padding:14px;text-align:center}
.metric .v{font-size:20px;font-weight:800;color:var(--blue)}
.metric .k{font-size:12px;color:var(--gray);margin-top:3px}

/* ---------- 文章列表 ---------- */
.article-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.25s;display:flex;flex-direction:column}
.article-card:hover{box-shadow:var(--shadow);border-color:#C9D9FF}
.article-card .meta{font-size:12.5px;color:var(--gray);display:flex;gap:14px;margin-bottom:10px}
.article-card .meta .cat{color:var(--blue);font-weight:600}
.article-card h3{font-size:17.5px;font-weight:700;line-height:1.5;margin-bottom:10px}
.article-card h3 a:hover{color:var(--blue)}
.article-card p{color:var(--gray);font-size:14px;flex:1}
.article-card .more{margin-top:14px;color:var(--blue);font-size:14px;font-weight:600}

/* ---------- FAQ ---------- */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px;padding:22px 26px}
.faq-item h3{font-size:16.5px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.faq-item p{color:var(--gray);font-size:14.5px}

/* ---------- CTA bar ---------- */
.cta-bar{background:var(--grad);color:#fff;padding:64px 0;text-align:center}
.cta-bar h2{font-size:30px;font-weight:800}
.cta-bar p{margin:12px 0 28px;font-size:16px;opacity:.92}
.cta-bar .btn{background:#fff;color:var(--blue);font-weight:700}
.cta-bar .tel-big{font-size:26px;font-weight:800;letter-spacing:1px;margin-top:6px}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink);color:#94A3B8;padding:56px 0 0;font-size:14px}
.footer .grid{grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer h5{color:#E2E8F0;font-size:15.5px;margin-bottom:14px}
.footer a{display:block;padding:4px 0;color:#94A3B8}
.footer a:hover{color:#fff}
.footer .copy{border-top:1px solid #223047;padding:20px 0;text-align:center;font-size:13px;color:#64748B}
.footer .copy a{display:inline;color:#94A3B8}

/* ---------- 移动端 ---------- */
@media(max-width:900px){
  .hero h1{font-size:32px}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .specs-grid{grid-template-columns:1fr 1fr}
  .footer .grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .hero{padding:64px 0 72px}
  .section{padding:60px 0}
  .sec-head h2{font-size:26px}
  .page-hero h1{font-size:28px}
  .hero-stats{gap:30px}
}

/* ---------- 移动端深度优化(紧凑排版) ---------- */
@media(max-width:900px){
  /* 间距全面收紧 */
  .hero{padding:44px 0 54px}
  .hero h1{font-size:27px;line-height:1.35;letter-spacing:0}
  .hero p.sub{font-size:14.5px;margin-top:14px}
  .hero .tag{font-size:12px;padding:5px 12px;margin-bottom:18px}
  .hero .actions{margin-top:24px;gap:10px}
  .btn{padding:11px 20px;font-size:14.5px;width:100%;justify-content:center}
  .hero-stats{gap:16px;margin-top:34px}
  .hero-stats .num{font-size:26px}
  .hero-stats .lbl{font-size:11.5px}
  .section{padding:46px 0}
  .sec-head{margin-bottom:30px}
  .sec-head h2{font-size:22px}
  .sec-head p{font-size:13.5px;margin-top:8px}
  .sec-head .kicker{font-size:11.5px;padding:4px 12px;margin-bottom:10px}
  /* 卡片紧凑 */
  .card{padding:22px 18px}
  .card .icon{width:42px;height:42px;font-size:19px;margin-bottom:12px;border-radius:10px}
  .card h3{font-size:16.5px;margin-bottom:8px}
  .card p{font-size:13.5px}
  .card ul li{font-size:13px;padding:5px 0 5px 22px}
  /* 价格卡紧凑 */
  .pricing-grid{gap:14px}
  .price-card{padding:24px 20px}
  .price-card .p-price{font-size:32px}
  .price-card ul li{font-size:13px;padding:7px 0 7px 22px}
  .price-card .btn{padding:11px 16px;font-size:14px}
  /* 内容块/FAQ 紧凑 */
  .content-block{padding:24px 18px;margin-bottom:14px}
  .content-block h2{font-size:18.5px;margin-bottom:12px;padding-left:10px;border-left-width:3px}
  .content-block p{font-size:14px;margin-bottom:8px}
  .content-block h3{font-size:15.5px;margin:14px 0 6px}
  .content-block ul li{font-size:14px;padding:5px 0 5px 22px}
  .faq-item{padding:16px 16px;margin-bottom:10px}
  .faq-item h3{font-size:15px}
  .faq-item p{font-size:13.5px}
  /* 榜单/案例/文章 */
  .rank-col{padding:18px 14px}
  .rank-item{padding:9px 0}
  .rank-item .rk-title{font-size:13.5px}
  .rank-item .rk-desc{font-size:12px}
  .rank-item .rk-src{font-size:11px}
  .case-body{padding:16px 18px 20px}
  .case-body h3{font-size:16px}
  .article-card{padding:20px 18px}
  .article-card h3{font-size:15.5px}
  /* 页脚与CTA */
  .cta-bar{padding:42px 0}
  .cta-bar h2{font-size:21px}
  .cta-bar p{font-size:13.5px;margin:8px 0 18px}
  .cta-bar .tel-big{font-size:21px;margin-top:4px}
  .footer{padding:36px 0 0;font-size:13px}
  .footer .grid{gap:22px;padding-bottom:24px}
  .page-hero{padding:44px 0}
  .page-hero h1{font-size:25px}
  .page-hero p{font-size:14px;margin-top:10px}
  .page-hero .crumb{font-size:12.5px;margin-bottom:12px}
  /* 导航 */
  .nav .wrap{height:56px}
  .brand{font-size:16.5px}
  .brand .logo{width:28px;height:28px;font-size:14px;border-radius:7px}
}