/* =========================================================
   祺德模块化管理后台有限公司 - 企业站样式
   主题：深蓝 + 金色点缀 · 响应式商务风
   说明：所有公司名/文案均为占位示例，请按需替换
   ========================================================= */

:root {
  --navy-900: #0b1a2e;
  --navy-800: #102a43;
  --navy-700: #1b3a5b;
  --steel: #2c5282;
  --gold: #c9a227;
  --gold-soft: #e3c565;
  --gray-50: #f7f9fc;
  --gray-100: #f1f4f8;
  --gray-200: #e4e9f0;
  --gray-400: #9aa7b4;
  --gray-600: #5a6b7b;
  --text: #16222f;
  --text-soft: #3c4a58;
  --white: #ffffff;
  --shadow-sm: 0 2px 8px rgba(16, 42, 67, 0.08);
  --shadow-md: 0 10px 30px rgba(16, 42, 67, 0.12);
  --shadow-lg: 0 20px 50px rgba(16, 42, 67, 0.18);
  --radius: 14px;
  --maxw: 1200px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section-sm { padding: 64px 0; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; font-weight: 600;
  font-size: 15px; transition: all .25s ease; cursor: pointer; border: none;
}
.btn-primary { background: var(--gold); color: var(--navy-900); }
.btn-primary:hover { background: var(--gold-soft); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline { border: 1.5px solid rgba(255,255,255,.55); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-dark { background: var(--navy-800); color: #fff; }
.btn-dark:hover { background: var(--navy-700); transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 26, 46, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.brand .logo {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  display: grid; place-items: center; color: var(--navy-900); font-weight: 800; font-size: 18px;
}
.brand .name { font-size: 18px; font-weight: 700; letter-spacing: .5px; }
.brand .sub { font-size: 11px; color: var(--gray-400); letter-spacing: 2px; }

.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: #d7dee8; font-size: 15px; font-weight: 500; position: relative; transition: color .2s; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px;
  background: var(--gold); transition: width .25s;
}
.nav-links a:hover, .nav-links a.active { color: #fff; }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta { margin-left: 8px; }

.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; }
.hamburger span { width: 24px; height: 2px; background: #fff; transition: .3s; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none; flex-direction: column; gap: 4px;
  background: var(--navy-800); padding: 12px 24px 20px; border-top: 1px solid rgba(255,255,255,.06);
}
.mobile-menu a { color: #d7dee8; padding: 12px 4px; border-bottom: 1px solid rgba(255,255,255,.05); font-size: 15px; }
.mobile-menu a:hover { color: var(--gold-soft); }

/* ---------- Hero ---------- */
.hero {
  position: relative; color: #fff; overflow: hidden;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(44,82,130,.55), transparent 60%),
              radial-gradient(800px 500px at 10% 110%, rgba(201,162,39,.25), transparent 55%),
              linear-gradient(160deg, var(--navy-900), var(--navy-700));
  padding: 120px 0 110px;
}
.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: 46px 46px; mask-image: radial-gradient(circle at 50% 40%, #000 30%, transparent 80%);
}
.hero .container { position: relative; z-index: 2; }
.hero .eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: 3px; color: var(--gold-soft);
  border: 1px solid rgba(227,197,101,.4); padding: 6px 16px; border-radius: 999px; margin-bottom: 24px;
}
.hero h1 { font-size: 50px; line-height: 1.18; font-weight: 800; letter-spacing: 1px; max-width: 760px; }
.hero h1 .accent { color: var(--gold-soft); }
.hero p.lead { margin: 24px 0 36px; font-size: 18px; color: #c8d3df; max-width: 620px; }
.hero .actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 48px; margin-top: 64px; flex-wrap: wrap; }
.hero-stats .item .num { font-size: 38px; font-weight: 800; color: #fff; }
.hero-stats .item .num span { color: var(--gold-soft); }
.hero-stats .item .label { font-size: 14px; color: var(--gray-400); }

/* ---------- 数据条 ---------- */
.stats-bar { background: var(--navy-800); color: #fff; }
.stats-bar .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; padding: 34px 24px; }
.stats-bar .stat { text-align: center; flex: 1 1 160px; }
.stats-bar .stat .n { font-size: 30px; font-weight: 800; color: var(--gold-soft); }
.stats-bar .stat .t { font-size: 14px; color: #b9c4d0; margin-top: 4px; }

/* ---------- 区块标题 ---------- */
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .tag { color: var(--gold); font-weight: 700; letter-spacing: 2px; font-size: 13px; text-transform: uppercase; }
.section-head h2 { font-size: 36px; font-weight: 800; margin: 12px 0 14px; color: var(--navy-800); }
.section-head p { color: var(--gray-600); font-size: 16px; }

/* ---------- 关于简介 ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.about-text h2 { font-size: 34px; font-weight: 800; color: var(--navy-800); margin-bottom: 18px; }
.about-text p { color: var(--text-soft); margin-bottom: 16px; }
.about-points { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 28px; }
.about-points .pt { display: flex; gap: 12px; align-items: flex-start; }
.about-points .pt .ic {
  width: 38px; height: 38px; flex: none; border-radius: 10px; background: var(--gray-100);
  color: var(--steel); display: grid; place-items: center; font-size: 18px;
}
.about-points .pt h4 { font-size: 16px; color: var(--navy-800); margin-bottom: 2px; }
.about-points .pt p { font-size: 14px; color: var(--gray-600); margin: 0; }
.about-visual {
  background: linear-gradient(160deg, var(--navy-800), var(--steel));
  border-radius: 20px; padding: 38px; color: #fff; position: relative; overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.about-visual::after {
  content: ""; position: absolute; right: -40px; bottom: -40px; width: 180px; height: 180px;
  border: 2px solid rgba(227,197,101,.4); border-radius: 50%;
}
.about-visual h3 { font-size: 22px; margin-bottom: 18px; }
.about-visual ul li { padding: 11px 0; border-bottom: 1px solid rgba(255,255,255,.1); display: flex; justify-content: space-between; font-size: 15px; }
.about-visual ul li span:last-child { color: var(--gold-soft); font-weight: 600; }

/* ---------- 业务卡片 ---------- */
.biz-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.biz-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 32px 26px; transition: all .3s ease; position: relative; overflow: hidden;
}
.biz-card::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--gold); transform: scaleX(0); transform-origin: left; transition: transform .3s; }
.biz-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.biz-card:hover::before { transform: scaleX(1); }
.biz-card .biz-ic { width: 54px; height: 54px; border-radius: 14px; background: var(--gray-100); color: var(--steel); display: grid; place-items: center; font-size: 26px; margin-bottom: 18px; }
.biz-card h3 { font-size: 19px; color: var(--navy-800); margin-bottom: 10px; }
.biz-card p { font-size: 14px; color: var(--gray-600); margin-bottom: 16px; }
.biz-card .more { font-size: 14px; font-weight: 600; color: var(--gold); }

/* ---------- 服务优势 ---------- */
.adv-section { background: var(--gray-50); }
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.adv-card { background: #fff; border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow-sm); border: 1px solid var(--gray-100); transition: all .3s; }
.adv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.adv-card .adv-num { font-size: 13px; font-weight: 700; color: var(--gold); letter-spacing: 1px; }
.adv-card h4 { font-size: 17px; color: var(--navy-800); margin: 8px 0 8px; }
.adv-card p { font-size: 14px; color: var(--gray-600); }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.news-card { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--gray-200); transition: all .3s; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.news-thumb { height: 170px; background: linear-gradient(135deg, var(--navy-700), var(--steel)); position: relative; display: grid; place-items: center; color: rgba(255,255,255,.85); font-size: 40px; }
.news-thumb .badge { position: absolute; top: 14px; left: 14px; background: var(--gold); color: var(--navy-900); font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; }
.news-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.news-body .date { font-size: 13px; color: var(--gray-400); margin-bottom: 8px; }
.news-body h3 { font-size: 18px; color: var(--navy-800); line-height: 1.5; margin-bottom: 10px; }
.news-body p { font-size: 14px; color: var(--gray-600); flex: 1; }
.news-body .read { margin-top: 14px; font-size: 14px; font-weight: 600; color: var(--steel); }

/* ---------- CTA 横幅 ---------- */
.cta-band { background: linear-gradient(135deg, var(--navy-800), var(--steel)); color: #fff; border-radius: 20px; padding: 56px 48px; text-align: center; position: relative; overflow: hidden; }
.cta-band::before { content: ""; position: absolute; inset: 0; background: radial-gradient(500px 300px at 90% 10%, rgba(201,162,39,.35), transparent 60%); }
.cta-band h2 { font-size: 32px; margin-bottom: 12px; position: relative; }
.cta-band p { color: #c8d3df; margin-bottom: 28px; position: relative; }

/* ---------- 页脚 ---------- */
.footer { background: var(--navy-900); color: #aeb9c6; padding: 60px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; }
.footer .brand { margin-bottom: 18px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer-links li { padding: 7px 0; }
.footer-links a:hover { color: var(--gold-soft); }
.footer .contact-line { display: flex; gap: 10px; padding: 6px 0; font-size: 14px; }
.footer .contact-line .ic { color: var(--gold); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); margin-top: 40px; padding-top: 22px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--gray-400); }

/* ---------- 内页通用 ---------- */
.page-hero { background: linear-gradient(160deg, var(--navy-900), var(--steel)); color: #fff; padding: 90px 0 70px; position: relative; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px); background-size: 44px 44px; mask-image: radial-gradient(circle at 30% 30%, #000, transparent 75%); }
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: 42px; font-weight: 800; margin-bottom: 12px; }
.page-hero p { color: #c8d3df; max-width: 640px; }
.breadcrumb { font-size: 13px; color: var(--gold-soft); margin-bottom: 14px; letter-spacing: 1px; }

/* ---------- 时间线（发展历程） ---------- */
.timeline { position: relative; max-width: 820px; margin: 0 auto; }
.timeline::before { content: ""; position: absolute; left: 18px; top: 6px; bottom: 6px; width: 2px; background: var(--gray-200); }
.tl-item { position: relative; padding: 0 0 36px 56px; }
.tl-item .dot { position: absolute; left: 10px; top: 4px; width: 18px; height: 18px; border-radius: 50%; background: var(--gold); border: 4px solid #fff; box-shadow: 0 0 0 2px var(--gold); }
.tl-item .year { font-size: 20px; font-weight: 800; color: var(--navy-800); }
.tl-item h4 { font-size: 17px; margin: 4px 0 6px; color: var(--steel); }
.tl-item p { color: var(--gray-600); }

/* ---------- 产品服务 ---------- */
.prod-block { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; align-items: center; padding: 40px 0; border-bottom: 1px solid var(--gray-200); }
.prod-block:last-child { border-bottom: none; }
.prod-block:nth-child(even) .prod-visual { order: 2; }
.prod-visual { height: 240px; border-radius: 18px; display: grid; place-items: center; color: rgba(255,255,255,.9); font-size: 56px; }
.prod-visual.c1 { background: linear-gradient(135deg, #1b3a5b, #2c5282); }
.prod-visual.c2 { background: linear-gradient(135deg, #143d2e, #2f7d52); }
.prod-visual.c3 { background: linear-gradient(135deg, #4a2f12, #b07a25); }
.prod-visual.c4 { background: linear-gradient(135deg, #2a1a4a, #5b3a8c); }
.prod-text h3 { font-size: 24px; color: var(--navy-800); margin-bottom: 12px; }
.prod-text p { color: var(--text-soft); margin-bottom: 16px; }
.prod-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.prod-tags span { background: var(--gray-100); color: var(--steel); font-size: 13px; padding: 6px 14px; border-radius: 999px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; }
.contact-info .ci { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--gray-200); }
.contact-info .ci .ic { width: 46px; height: 46px; flex: none; border-radius: 12px; background: var(--gray-100); color: var(--steel); display: grid; place-items: center; font-size: 20px; }
.contact-info .ci h4 { font-size: 15px; color: var(--gray-600); margin-bottom: 2px; }
.contact-info .ci p { font-size: 16px; color: var(--navy-800); font-weight: 600; }
.form-card { background: var(--gray-50); border-radius: 18px; padding: 36px; box-shadow: var(--shadow-sm); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--navy-800); margin-bottom: 7px; font-weight: 600; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--gray-200); border-radius: 10px;
  font-family: inherit; font-size: 15px; color: var(--text); background: #fff; transition: border .2s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--steel); }
.field textarea { resize: vertical; min-height: 110px; }
.map-placeholder { height: 320px; border-radius: 18px; background: linear-gradient(135deg, #e4e9f0, #cdd6e0); display: grid; place-items: center; color: var(--gray-600); margin-top: 28px; position: relative; overflow: hidden; }
.map-placeholder .pin { font-size: 44px; }

/* ---------- 新闻详情 ---------- */
.article { max-width: 820px; margin: 0 auto; }
.article .meta { color: var(--gray-400); font-size: 14px; margin-bottom: 18px; }
.article h1 { font-size: 32px; color: var(--navy-800); line-height: 1.4; margin-bottom: 18px; }
.article p { color: var(--text-soft); margin-bottom: 18px; font-size: 16.5px; }
.article h3 { font-size: 22px; color: var(--navy-800); margin: 28px 0 12px; }

/* ---------- 滚动揭示动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .biz-grid, .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr 1fr; }
  .about-grid, .prod-block, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .prod-block:nth-child(even) .prod-visual { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 38px; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: flex; }
  .mobile-menu.show { display: flex; }
  .section { padding: 60px 0; }
  .hero { padding: 80px 0 70px; }
  .hero h1 { font-size: 30px; }
  .hero-stats { gap: 28px; }
  .biz-grid, .adv-grid, .news-grid { grid-template-columns: 1fr; }
  .about-points { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 28px; }
  .cta-band { padding: 40px 24px; }
}