/* ============ 官网样式（www.hua-zhu.com）============ */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif;
       color: #2d3a4a; background: #fff; line-height: 1.7; }
a { color: #2d6cdf; text-decoration: none; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.center { text-align: center; }
.empty { text-align: center; color: #999; padding: 40px 0; }
.flash { padding: 12px 18px; margin: 14px auto; max-width: 680px; border-radius: 8px;
         text-align: center; }
.flash.ok { background: #e6f7ed; color: #1a7f37; }
.flash.err { background: #fdecec; color: #c62828; }

/* 导航 */
.site-nav { position: sticky; top: 0; z-index: 100; background: rgba(20,30,48,.96);
            backdrop-filter: blur(8px); box-shadow: 0 2px 12px rgba(0,0,0,.15); }
.nav-inner { display: flex; align-items: center; justify-content: space-between;
             height: 64px; }
.logo { font-size: 22px; font-weight: 800; color: #fff; letter-spacing: 1px; }
.logo span { color: #4da3ff; }
.nav-menu { display: flex; align-items: center; gap: 26px; }
.nav-menu a { color: #cfd8e3; font-size: 15px; transition: color .2s; }
.nav-menu a:hover { color: #fff; }
.nav-toggle { display: none; background: none; border: none; color: #fff;
              font-size: 24px; cursor: pointer; }
.btn { display: inline-block; padding: 11px 26px; border-radius: 8px;
       font-size: 15px; font-weight: 600; text-align: center; cursor: pointer;
       border: 1px solid transparent; transition: all .2s; }
.btn-primary { background: linear-gradient(135deg, #2d6cdf, #4da3ff); color: #fff;
               box-shadow: 0 4px 14px rgba(45,108,223,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(45,108,223,.45); }
.btn-ghost { border-color: #2d6cdf; color: #2d6cdf; background: #fff; }
.btn-ghost:hover { background: #f0f6ff; }
.btn-light { background: #fff; color: #1f2d3d; }
.btn-lg { padding: 14px 38px; font-size: 16px; }
.btn-block { display: block; width: 100%; }
.btn-demo { padding: 8px 18px; }
.danger { color: #c62828; border-color: #f0c0c0; }
.danger:hover { background: #fdecec; }

/* Hero */
.hero { background: linear-gradient(135deg, #0f1b30 0%, #16294a 45%, #1d3a6e 100%);
        color: #fff; padding: 90px 0 70px; text-align: center;
        position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; inset: 0;
               background: radial-gradient(600px 300px at 80% 10%, rgba(77,163,255,.25), transparent),
                           radial-gradient(500px 280px at 15% 90%, rgba(108,92,231,.2), transparent); }
.hero .container { position: relative; z-index: 1; }
.hero h1 { font-size: 46px; font-weight: 800; letter-spacing: 1px; margin-bottom: 18px; }
.hero-sub { font-size: 18px; color: #b8c8e0; max-width: 720px; margin: 0 auto 34px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-notice { margin-top: 30px; color: #9fb4d4; font-size: 14px; }
.hero-sm { padding: 56px 0 44px; }
.hero-sm h1 { font-size: 34px; }
.hero-carousel .hero-slide { display: none; }
.hero-carousel .hero-slide.active { display: block; }

/* 统计 */
.stats { background: #fff; margin-top: -34px; position: relative; z-index: 2; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { background: #fff; border-radius: 14px; box-shadow: 0 6px 24px rgba(15,27,48,.08);
        padding: 26px; text-align: center; }
.stat .num { font-size: 34px; font-weight: 800; color: #2d6cdf; }
.stat .lab { color: #8896a8; margin-top: 6px; }

/* 分区 */
.section { padding: 64px 0; }
.section.alt { background: #f6f9fd; }
.sec-title { text-align: center; font-size: 30px; font-weight: 800; color: #1f2d3d; }
.sec-sub { text-align: center; color: #8896a8; margin: 10px 0 40px; }

/* 卡片网格 */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card { background: #fff; border-radius: 14px; padding: 26px;
        box-shadow: 0 4px 18px rgba(15,27,48,.06); transition: all .25s;
        border: 1px solid #eef2f7; }
.card:hover { transform: translateY(-5px); box-shadow: 0 12px 30px rgba(45,108,223,.14); }
.card-icon { font-size: 40px; margin-bottom: 12px; }
.card h3 { font-size: 18px; margin-bottom: 8px; color: #1f2d3d; }
.card p { color: #66788f; font-size: 14px; }
.card ul { margin-top: 12px; list-style: none; }
.card ul li { color: #66788f; font-size: 13px; padding: 3px 0; }
.module ul li::before { content: "✓ "; color: #2d6cdf; font-weight: 700; }

/* 案例 */
.case .case-tag { display: inline-block; background: #e8f1ff; color: #2d6cdf;
                  font-size: 12px; padding: 3px 12px; border-radius: 20px;
                  margin-bottom: 10px; }

/* 价格 */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.price-card { background: #fff; border-radius: 16px; padding: 32px 28px;
              box-shadow: 0 4px 18px rgba(15,27,48,.07); position: relative;
              border: 2px solid transparent; text-align: center; }
.price-card.hot { border-color: #2d6cdf; box-shadow: 0 10px 34px rgba(45,108,223,.2); }
.hot-tag { position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
           background: linear-gradient(135deg, #2d6cdf, #4da3ff); color: #fff;
           padding: 4px 18px; border-radius: 20px; font-size: 13px; font-weight: 700; }
.price-card h3 { font-size: 20px; margin-bottom: 14px; }
.price .num { font-size: 40px; font-weight: 800; color: #1f2d3d; }
.price .unit { color: #8896a8; font-size: 14px; margin-left: 6px; }
.price-card ul { text-align: left; margin: 20px 0; list-style: none; }
.price-card ul li { padding: 6px 0; color: #55667c; font-size: 14px; }
.price-card ul li::before { content: "✓ "; color: #2d6cdf; font-weight: 700; }

/* 新闻 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card { display: block; color: inherit; }
.news-date { color: #2d6cdf; font-size: 13px; margin-bottom: 8px; }
.news-card h3 { font-size: 16px; margin-bottom: 8px; }
.news-card p { color: #66788f; font-size: 14px; }
.article { max-width: 780px; }
.article h1 { font-size: 28px; margin: 10px 0; }
.article-summary { color: #66788f; background: #f6f9fd; padding: 14px 18px;
                   border-radius: 10px; margin: 16px 0; }
.article-body p { margin-bottom: 14px; }

/* 联系 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.contact-info p { margin: 12px 0; }
.contact-form .frow { margin-bottom: 14px; }
.contact-form label { display: block; margin-bottom: 6px; color: #55667c; font-size: 14px; }
.contact-form input, .contact-form textarea { width: 100%; padding: 10px 12px;
       border: 1px solid #d8e0ea; border-radius: 8px; font-size: 14px; }
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: #2d6cdf; }

/* CTA */
.cta { background: linear-gradient(135deg, #16294a, #1d3a6e); color: #fff;
       text-align: center; padding: 70px 20px; }
.cta h2 { font-size: 30px; margin-bottom: 12px; }
.cta p { color: #b8c8e0; margin-bottom: 28px; }

/* Footer */
.site-footer { background: #0f1b30; color: #9fb4d4; padding: 46px 0 0; font-size: 14px; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; padding-bottom: 30px; }
.foot-logo { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.foot-logo span { color: #4da3ff; }
.foot-grid b { display: block; color: #fff; margin-bottom: 12px; }
.foot-grid a { display: block; color: #9fb4d4; margin: 6px 0; }
.foot-grid a:hover { color: #fff; }
.foot-bottom { border-top: 1px solid #1d2c45; padding: 16px 0; text-align: center;
               font-size: 13px; color: #6f83a0; }

/* 后台管理 */
.admin-login { max-width: 380px; margin: 30px auto; text-align: left; }
.admin-login h2 { text-align: center; margin-bottom: 18px; }
.admin-login label { display: block; margin-bottom: 6px; color: #55667c; }
.admin-login input { width: 100%; padding: 10px 12px; border: 1px solid #d8e0ea;
                     border-radius: 8px; }
.admin-nav { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 26px; }
.admin-nav a { background: #fff; border: 1px solid #d8e0ea; border-radius: 20px;
               padding: 6px 16px; font-size: 14px; color: #55667c; }
.admin-nav a:hover { border-color: #2d6cdf; color: #2d6cdf; }
.admin-sec { margin-bottom: 26px; }
.admin-sec h3 { margin-bottom: 16px; }
.admin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
.admin-grid .frow { margin-bottom: 12px; }
.admin-grid label { display: block; margin-bottom: 4px; color: #55667c; font-size: 13px; }
.admin-grid input, .admin-grid textarea { width: 100%; padding: 8px 10px;
       border: 1px solid #d8e0ea; border-radius: 8px; font-size: 14px; }
.admin-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
             gap: 8px; align-items: center; padding: 10px 0;
             border-bottom: 1px solid #f0f3f8; }
.admin-row input, .admin-row textarea { padding: 7px 9px; border: 1px solid #d8e0ea;
       border-radius: 7px; font-size: 13px; }
.admin-row.new { border-bottom: none; }
.admin-row .chk { display: flex; align-items: center; gap: 4px; font-size: 13px; color: #55667c; }
.admin-sec .tbl { margin-top: 8px; }
.admin-sec .tbl th, .admin-sec .tbl td { padding: 8px 10px; font-size: 13px; }

/* 响应式 */
@media (max-width: 900px) {
  .card-grid, .price-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .nav-toggle { display: block; }
  .nav-menu { display: none; position: absolute; top: 64px; left: 0; right: 0;
              background: #16294a; flex-direction: column; padding: 16px 20px;
              gap: 14px; align-items: flex-start; }
  .nav-menu.open { display: flex; }
  .card-grid, .price-grid, .news-grid, .stats-grid, .contact-grid,
  .foot-grid, .admin-grid { grid-template-columns: 1fr; }
  .section { padding: 44px 0; }
  .sec-title { font-size: 24px; }
  .hero-cta .btn { width: 100%; }
}