/* === 德知域官网 - 主样式 === */
:root {
  --primary: #1a56db;
  --primary-dark: #1344b6;
  --accent: #06b6d4;
  --dark: #0f172a;
  --gray-700: #374151;
  --gray-500: #6b7280;
  --gray-200: #e5e7eb;
  --gray-50:  #f9fafb;
  --white: #ffffff;
  --radius: 8px;
  --shadow: 0 2px 16px rgba(0,0,0,.08);
  --shadow-md: 0 4px 24px rgba(0,0,0,.12);
  --font: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; font-size:16px; }
body { font-family:var(--font); color:var(--gray-700); background:var(--white); line-height:1.7; }
img { max-width:100%; height:auto; display:block; }
a { color:var(--primary); text-decoration:none; }
a:hover { color:var(--primary-dark); }
ul { list-style:none; }
address { font-style:normal; }

/* Container */
.container { max-width:1200px; margin:0 auto; padding:0 20px; }
.section-pad { padding:72px 0; }
.bg-light { background:var(--gray-50); }

/* Section heading */
.section-head { text-align:center; margin-bottom:48px; }
.section-head h2 { font-size:2rem; color:var(--dark); margin-bottom:12px; }
.section-head p { color:var(--gray-500); font-size:1.05rem; }
.section-more { text-align:center; margin-top:40px; }

/* Buttons */
.btn-primary {
  display:inline-block; background:var(--primary); color:var(--white);
  padding:12px 28px; border-radius:var(--radius); font-weight:600;
  transition:background .2s,transform .1s; border:none; cursor:pointer;
}
.btn-primary:hover { background:var(--primary-dark); color:var(--white); transform:translateY(-1px); }
.btn-outline {
  display:inline-block; border:2px solid var(--primary); color:var(--primary);
  padding:10px 26px; border-radius:var(--radius); font-weight:600; transition:.2s;
}
.btn-outline:hover { background:var(--primary); color:var(--white); }
.btn-lg { padding:16px 40px; font-size:1.1rem; }
.btn-block { width:100%; text-align:center; padding:14px; }

/* ---- Header ---- */
.site-header {
  position:sticky; top:0; z-index:100;
  background:var(--white); border-bottom:1px solid var(--gray-200);
  box-shadow:0 1px 8px rgba(0,0,0,.06);
}
.header-inner { display:flex; align-items:center; gap:24px; height:68px; }
.logo { display:flex; flex-direction:column; line-height:1.1; text-decoration:none; }
.logo-text { font-size:1.6rem; font-weight:800; color:var(--dark); }
.logo-text em { color:var(--primary); font-style:normal; }
.logo-sub { font-size:.68rem; color:var(--gray-500); letter-spacing:.05em; }
.main-nav { flex:1; }
.nav-list { display:flex; gap:4px; justify-content:flex-end; }
.nav-list a { padding:6px 14px; border-radius:6px; color:var(--gray-700); font-size:.95rem; transition:.15s; }
.nav-list a:hover,.nav-list a.active { background:var(--primary); color:var(--white); }
.nav-toggle { display:none; background:none; border:none; font-size:1.4rem; cursor:pointer; }
.cta-btn { background:var(--primary); color:var(--white); padding:8px 20px;
           border-radius:var(--radius); font-weight:600; white-space:nowrap; }
.cta-btn:hover { background:var(--primary-dark); color:var(--white); }

/* ---- Hero ---- */
.hero { background:linear-gradient(135deg,var(--dark) 0%,#1e3a6e 100%); color:var(--white); padding:80px 0; }
.hero-inner { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; }
.hero h1 { font-size:2.4rem; line-height:1.35; margin-bottom:20px; }
.hero h1 strong { color:var(--accent); }
.hero-desc { font-size:1.05rem; color:rgba(255,255,255,.8); margin-bottom:32px; line-height:1.8; }
.hero-btns { display:flex; gap:16px; flex-wrap:wrap; }
.hero-stats { display:grid; grid-template-columns:1fr 1fr; gap:24px; }
.stat-item { background:rgba(255,255,255,.1); border-radius:12px; padding:24px 20px; text-align:center; }
.stat-num { display:block; font-size:2.2rem; font-weight:800; color:var(--accent); }
.stat-num em { font-size:1.2rem; font-style:normal; }
.stat-item span:last-child { font-size:.9rem; color:rgba(255,255,255,.75); }

/* ---- Services ---- */
.services-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.service-card { background:var(--white); border-radius:12px; padding:36px 28px;
                box-shadow:var(--shadow); transition:transform .2s,box-shadow .2s; }
.service-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-md); }
.svc-icon { font-size:2.4rem; margin-bottom:16px; }
.service-card h3 { font-size:1.2rem; color:var(--dark); margin-bottom:12px; }
.service-card p { color:var(--gray-500); font-size:.95rem; line-height:1.7; }
.card-link { display:inline-block; margin-top:16px; font-weight:600; }

/* ---- Content Cards Grid ---- */
.cards-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.content-card { background:var(--white); border-radius:12px; border:1px solid var(--gray-200);
                overflow:hidden; transition:transform .2s,box-shadow .2s; }
.content-card:hover { transform:translateY(-3px); box-shadow:var(--shadow-md); }
.card-img { height:180px; overflow:hidden; background:var(--gray-50); }
.card-img img { width:100%; height:100%; object-fit:cover; }
.card-body { padding:20px; }
.card-body h2,.card-body h3 { font-size:1rem; line-height:1.5; margin-bottom:8px; color:var(--dark); }
.card-body h2 a,.card-body h3 a { color:var(--dark); }
.card-body h2 a:hover,.card-body h3 a:hover { color:var(--primary); }
.card-desc { color:var(--gray-500); font-size:.88rem; margin-bottom:12px; display:-webkit-box;
             -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.card-meta { display:flex; justify-content:space-between; align-items:center; font-size:.82rem; color:var(--gray-500); }
.card-date { font-size:.82rem; color:var(--gray-500); }

/* ---- News List ---- */
.news-list { display:flex; flex-direction:column; gap:0; border:1px solid var(--gray-200); border-radius:12px; overflow:hidden; }
.news-item { display:flex; gap:24px; padding:20px 24px; border-bottom:1px solid var(--gray-200); transition:background .15s; }
.news-item:last-child { border-bottom:none; }
.news-item:hover { background:var(--gray-50); }
.news-date { min-width:90px; font-size:.85rem; color:var(--gray-500); padding-top:3px; }
.news-content h3 { font-size:1rem; margin-bottom:6px; }
.news-content h3 a { color:var(--dark); }
.news-content h3 a:hover { color:var(--primary); }
.news-content p { font-size:.88rem; color:var(--gray-500); }

/* ---- FAQ List ---- */
.faq-list { display:flex; flex-direction:column; gap:12px; }
.faq-item { background:var(--white); border:1px solid var(--gray-200); border-radius:var(--radius);
            padding:18px 24px; transition:border-color .15s; }
.faq-item:hover { border-color:var(--primary); }
.faq-item h3 { font-size:1rem; font-weight:500; }
.faq-item h3 a { color:var(--dark); }
.faq-item h3 a:hover { color:var(--primary); }

/* ---- CTA Section ---- */
.cta-section { background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%); padding:80px 0; }
.cta-inner { text-align:center; color:var(--white); }
.cta-inner h2 { font-size:2rem; margin-bottom:12px; }
.cta-inner p { font-size:1.1rem; opacity:.9; margin-bottom:32px; }
.cta-inner .btn-primary { background:var(--white); color:var(--primary); }
.cta-inner .btn-primary:hover { background:var(--gray-50); }

/* ---- Page Banner ---- */
.page-banner { background:linear-gradient(135deg,var(--dark) 0%,#1e3a6e 100%); padding:56px 0 40px; color:var(--white); }
.page-banner h1 { font-size:2rem; margin-bottom:12px; }
.page-banner-sm { padding:32px 0 24px; }
.breadcrumb { font-size:.88rem; color:rgba(255,255,255,.7); }
.breadcrumb a { color:rgba(255,255,255,.7); }
.breadcrumb a:hover { color:var(--white); }
.breadcrumb span { margin:0 6px; }

/* ---- Pagination ---- */
.pagination { display:flex; justify-content:center; gap:8px; margin-top:48px; flex-wrap:wrap; }
.page-btn { padding:8px 14px; border:1px solid var(--gray-200); border-radius:6px;
            color:var(--gray-700); font-size:.9rem; transition:.15s; }
.page-btn:hover { border-color:var(--primary); color:var(--primary); }
.page-btn.active { background:var(--primary); border-color:var(--primary); color:var(--white); }
.page-ellipsis { padding:8px 4px; color:var(--gray-500); }
.empty-state { text-align:center; padding:80px 0; color:var(--gray-500); }

/* ---- Detail Page ---- */
.detail-layout { display:grid; grid-template-columns:1fr 320px; gap:40px; padding:56px 20px; max-width:1200px; }
.detail-header { margin-bottom:32px; }
.detail-header h1 { font-size:1.7rem; color:var(--dark); line-height:1.45; margin-bottom:16px; }
.detail-meta { display:flex; flex-wrap:wrap; gap:16px; align-items:center; font-size:.88rem; color:var(--gray-500); }
.detail-tags { display:flex; flex-wrap:wrap; gap:6px; }
.tag { background:var(--gray-50); border:1px solid var(--gray-200); border-radius:4px;
       padding:2px 10px; font-size:.8rem; color:var(--gray-500); }
.detail-content { line-height:1.9; font-size:1rem; color:var(--gray-700); }
.detail-content h2,.detail-content h3 { color:var(--dark); margin:28px 0 12px; }
.detail-content h2 { font-size:1.3rem; }
.detail-content h3 { font-size:1.1rem; }
.detail-content p { margin-bottom:16px; }
.detail-content ul,.detail-content ol { margin:12px 0 16px 20px; }
.detail-content li { margin-bottom:6px; }
.detail-content table { width:100%; border-collapse:collapse; margin:20px 0; font-size:.92rem; }
.detail-content th { background:var(--primary); color:var(--white); padding:10px 14px; text-align:left; }
.detail-content td { padding:9px 14px; border:1px solid var(--gray-200); }
.detail-content tr:nth-child(even) td { background:var(--gray-50); }
.detail-content img { border-radius:var(--radius); margin:16px 0; }
.detail-footer { display:flex; gap:16px; margin-top:40px; padding-top:24px; border-top:1px solid var(--gray-200); }
.detail-sidebar { display:flex; flex-direction:column; gap:24px; }
.sidebar-card { background:var(--white); border:1px solid var(--gray-200); border-radius:12px; padding:24px; }
.sidebar-card h3 { font-size:1rem; color:var(--dark); margin-bottom:12px; }
.sidebar-card p { font-size:.9rem; color:var(--gray-500); line-height:1.7; margin-bottom:12px; }
.sidebar-cta { background:var(--gray-50); border-color:var(--primary); }

/* ---- About Page ---- */
.about-grid { display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:start; }
.about-text h2 { font-size:1.6rem; color:var(--dark); margin-bottom:20px; }
.about-text p { color:var(--gray-700); line-height:1.85; margin-bottom:16px; }
.about-stats { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.astat { background:var(--white); border-radius:12px; padding:28px 20px; text-align:center;
         box-shadow:var(--shadow); }
.astat span { display:block; font-size:2rem; font-weight:800; color:var(--primary); }
.astat label { font-size:.88rem; color:var(--gray-500); margin-top:4px; display:block; }
.why-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.why-item { text-align:center; padding:32px 20px; background:var(--white);
            border-radius:12px; box-shadow:var(--shadow); }
.why-icon { font-size:2.2rem; margin-bottom:14px; }
.why-item h3 { font-size:1rem; color:var(--dark); margin-bottom:10px; }
.why-item p { font-size:.88rem; color:var(--gray-500); line-height:1.7; }
.info-table { border:1px solid var(--gray-200); border-radius:12px; overflow:hidden; }
.info-row { display:flex; padding:16px 24px; border-bottom:1px solid var(--gray-200); font-size:.95rem; }
.info-row:last-child { border-bottom:none; }
.info-label { min-width:180px; font-weight:600; color:var(--dark); }

/* ---- Contact Page ---- */
.contact-grid { display:grid; grid-template-columns:1fr 1.2fr; gap:60px; align-items:start; }
.contact-info h2 { font-size:1.5rem; color:var(--dark); margin-bottom:16px; }
.contact-info > p { color:var(--gray-500); margin-bottom:32px; line-height:1.8; }
.contact-details { display:flex; flex-direction:column; gap:20px; }
.contact-item { display:flex; gap:16px; align-items:flex-start; }
.contact-icon { font-size:1.4rem; flex-shrink:0; }
.contact-item strong { display:block; color:var(--dark); margin-bottom:4px; }
.contact-item a { color:var(--primary); }
.contact-form { background:var(--gray-50); border-radius:16px; padding:36px 32px; }
.form-group { margin-bottom:20px; }
.form-group label { display:block; font-size:.9rem; font-weight:600; color:var(--dark); margin-bottom:6px; }
.form-group label em { color:#ef4444; font-style:normal; }
.form-group input,.form-group textarea {
  width:100%; padding:11px 14px; border:1px solid var(--gray-200); border-radius:var(--radius);
  font-family:var(--font); font-size:.95rem; color:var(--gray-700);
  transition:border-color .2s,box-shadow .2s; background:var(--white);
}
.form-group input:focus,.form-group textarea:focus {
  outline:none; border-color:var(--primary); box-shadow:0 0 0 3px rgba(26,86,219,.12);
}
.form-tip { font-size:.8rem; color:var(--gray-500); margin-top:12px; text-align:center; }

/* ---- Footer ---- */
.site-footer { background:var(--dark); color:rgba(255,255,255,.75); margin-top:0; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1.5fr; gap:40px; padding:60px 20px; }
.footer-brand .footer-logo { font-size:1.6rem; font-weight:800; color:var(--white); margin-bottom:12px; }
.footer-brand .footer-logo em { color:var(--accent); font-style:normal; }
.footer-brand p { font-size:.88rem; line-height:1.7; margin-bottom:8px; }
.footer-phone a { color:var(--accent); font-weight:600; }
.footer-links h3 { font-size:.95rem; color:var(--white); font-weight:600; margin-bottom:16px; }
.footer-links ul { display:flex; flex-direction:column; gap:10px; }
.footer-links a { font-size:.88rem; color:rgba(255,255,255,.65); transition:.15s; }
.footer-links a:hover { color:var(--white); }
.footer-contact h3 { font-size:.95rem; color:var(--white); font-weight:600; margin-bottom:16px; }
.footer-contact p { font-size:.88rem; margin-bottom:8px; line-height:1.6; }
.footer-bottom { border-top:1px solid rgba(255,255,255,.1); padding:20px; text-align:center; font-size:.82rem; }
.footer-bottom a { color:rgba(255,255,255,.5); }
.footer-bottom a:hover { color:var(--white); }

/* ---- List Section ---- */
.list-section { padding:56px 0; }

/* ---- Responsive ---- */
@media (max-width:1024px) {
  .cards-grid { grid-template-columns:repeat(2,1fr); }
  .why-grid { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .detail-layout { grid-template-columns:1fr; padding:40px 20px; }
  .detail-sidebar { flex-direction:row; flex-wrap:wrap; }
  .sidebar-card { flex:1; min-width:240px; }
}
@media (max-width:768px) {
  .hero-inner { grid-template-columns:1fr; gap:40px; }
  .hero h1 { font-size:1.8rem; }
  .hero-stats { grid-template-columns:repeat(2,1fr); }
  .services-grid { grid-template-columns:1fr; }
  .cards-grid { grid-template-columns:1fr; }
  .about-grid { grid-template-columns:1fr; }
  .contact-grid { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .nav-list { display:none; flex-direction:column; position:absolute; top:68px; left:0; right:0;
              background:var(--white); border-bottom:1px solid var(--gray-200);
              padding:12px 20px; box-shadow:0 4px 16px rgba(0,0,0,.1); }
  .nav-list.open { display:flex; }
  .nav-toggle { display:block; }
  .cta-btn { display:none; }
  .header-inner { position:relative; }
  .main-nav { order:-1; }
}
@media (max-width:480px) {
  .footer-grid { grid-template-columns:1fr; }
  .why-grid { grid-template-columns:1fr 1fr; }
  .section-pad { padding:48px 0; }
}