/* 永创网络科技 官网样式 —— 无外部依赖，离线可用 */
:root{
  --navy:#0b2f5c;
  --navy-2:#123f78;
  --blue:#1a6fd4;
  --teal:#00a3a3;
  --ink:#12263f;
  --muted:#5b6b7f;
  --line:#e3e8ef;
  --bg:#ffffff;
  --bg-alt:#f5f7fa;
  --radius:14px;
  --shadow:0 6px 24px rgba(11,47,92,.08);
  --wrap:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.75 "PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC","Hiragino Sans GB",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.35;margin:0 0 .6em}
h2{font-size:28px}
h3{font-size:18px}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
.muted{color:var(--muted);font-size:14px}

/* 顶部 */
.site-header{
  position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;letter-spacing:.5px}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted)}
.nav{display:flex;gap:20px;margin-left:auto;font-size:15px}
.nav a{color:var(--ink)}
.nav a:hover{color:var(--blue);text-decoration:none}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;border-radius:10px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:.18s;text-decoration:none;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 4px 14px rgba(26,111,212,.28)}
.btn-primary:hover{background:var(--navy-2)}
.btn-ghost{background:#fff;color:var(--navy);border-color:#c9d6e6}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{display:flex;width:100%}

/* 主视觉 */
.hero{
  background:
    radial-gradient(1100px 420px at 12% -10%, rgba(0,163,163,.18), transparent 60%),
    linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 55%,#16508f 100%);
  color:#fff;padding:78px 0 68px;position:relative;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;opacity:.16;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.35) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.35) 1px,transparent 1px);
  background-size:44px 44px;mask-image:linear-gradient(to bottom,transparent,#000 40%,transparent);
}
.hero-inner{position:relative;z-index:1}
.eyebrow{
  display:inline-block;margin:0 0 14px;padding:5px 12px;border-radius:999px;
  background:rgba(255,255,255,.14);font-size:13px;letter-spacing:1px;
}
.hero h1{font-size:38px;margin-bottom:16px}
.hero .lead{font-size:17px;color:#d8e6f7;max-width:720px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0 22px}
.hero .btn-ghost{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.45)}
.hero .btn-ghost:hover{background:rgba(255,255,255,.18);color:#fff}
.hero-points{display:flex;gap:22px;flex-wrap:wrap;list-style:none;padding:0;margin:0;font-size:14px;color:#cfe0f4}
.hero-points li::before{content:"●";color:var(--teal);margin-right:8px;font-size:10px;vertical-align:middle}

/* 区块 */
.section{padding:64px 0}
.section-alt{background:var(--bg-alt)}
.section-sub{color:var(--muted);margin-top:-8px}

/* 业务卡片 */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:26px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);transition:.2s;
}
.card:hover{transform:translateY(-3px);border-color:#c9dcf5}
.card h3{font-size:17px}
.card p{font-size:14.5px;color:#3d4d61}
.card-icon{
  width:44px;height:44px;border-radius:12px;margin-bottom:14px;
  background:linear-gradient(140deg,#e8f1fd,#dff3f3);display:flex;align-items:center;justify-content:center;
}
.card-icon svg{width:24px;height:24px;fill:none;stroke:var(--blue);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 0}
.tags span{
  font-size:12.5px;color:var(--navy);background:#eef4fb;border:1px solid #dbe7f6;
  padding:3px 10px;border-radius:999px;
}

/* 案例 */
.case-group{
  font-size:16px;margin:28px 0 2px;padding-left:12px;
  border-left:4px solid var(--teal);color:var(--navy);
}
.case-group:first-of-type{margin-top:22px}
.cases{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:26px}
.case{background:#fff;border:1px solid var(--line);border-left:4px solid var(--teal);
  border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow)}
.case p{font-size:14.5px;color:#3d4d61;margin-bottom:.4em}

/* 关于 */
.about-grid{display:grid;grid-template-columns:1.45fr 1fr;gap:34px;align-items:start}
.about-lead{font-size:19px;color:var(--navy);line-height:1.6}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:20px}
.stats>div{background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:14px 12px;text-align:center;box-shadow:var(--shadow)}
.stats b{display:block;font-size:22px;color:var(--blue);line-height:1.2}
.stats span{display:block;font-size:12.5px;color:var(--muted);margin-top:4px}
.about-list{list-style:none;padding:0;margin:0}
.about-list li{padding-left:20px;position:relative;margin-bottom:8px;font-size:15px}
.about-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;
  border-radius:2px;background:var(--teal)}
.about-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow)}
.about-card ul{padding-left:20px;margin:0 0 18px;font-size:14.5px;color:#3d4d61}
.about-card li{margin-bottom:6px}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:26px}
.contact-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.contact-item span{display:block;font-size:12.5px;color:var(--teal);letter-spacing:1px;margin-bottom:6px}
.contact-item p{margin:0;font-size:15px}

/* 页脚 */
.site-footer{border-top:1px solid var(--line);padding:26px 0;background:#fff}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.footer-inner strong{font-size:15px}
.footer-inner p{margin:4px 0 0}
.footer-right{display:flex;gap:16px;align-items:center;font-size:14px}

@media (max-width:900px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr}
  .nav{display:none}
}
@media (max-width:640px){
  .hero{padding:54px 0 46px}
  .hero h1{font-size:27px}
  .hero .lead{font-size:15.5px}
  .br-mobile{display:none}
  .cards,.cases,.contact-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .section{padding:46px 0}
  h2{font-size:23px}
}
@media print{
  .site-header,.hero-actions,.about-card .btn,.footer-right a{display:none}
}