/* ============================================
   云专线产品页 - yzx.css
   ============================================ */
.page-banner {
  position: relative;
  margin-top: 0; margin-bottom: 0;
  padding-top: 106px;
  height: 360px;
  overflow: hidden;
  background: linear-gradient(135deg, #051a4a 0%, #0a2d6e 40%, #006AFF 100%);
  display: flex; align-items: center; justify-content: center;
  box-sizing: border-box;
}
.page-banner .banner-overlay {
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='30' cy='30' r='1.5' fill='rgba(255,255,255,.05)'/%3E%3C/svg%3E") repeat;
  background-size: 60px 60px;
}
.banner-content { position: relative; z-index: 2; text-align: center; color: #fff; width: 100%; }
.banner-content .breadcrumb {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .88rem; color: rgba(255,255,255,.5); letter-spacing: 1px; margin-bottom: 24px;
}
.banner-content .breadcrumb a { color: rgba(255,255,255,.7); text-decoration: none; }
.banner-content .breadcrumb a:hover { color: #fff; }
.banner-content h1 { font-size: 3rem; font-weight: 900; letter-spacing: 6px; margin-bottom: 14px; text-shadow: 0 4px 30px rgba(0,106,255,.4); }
.banner-content p { font-size: 1.1rem; opacity: .7; letter-spacing: 3px; margin-bottom: 10px; }
.banner-cta { margin-top: 28px; display: flex; justify-content: center; gap: 16px; }
.banner-cta a { display: inline-block; padding: 13px 40px; border-radius: 50px; font-weight: 700; font-size: 1rem; text-decoration: none; transition: all .3s; }
.banner-cta .btn-primary { background: #fff; color: #006AFF; }
.banner-cta .btn-primary:hover { background: #e6f0ff; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0,106,255,.3); }
.banner-cta .btn-outline { border: 2px solid rgba(255,255,255,.4); color: #fff; }
.banner-cta .btn-outline:hover { border-color: #fff; background: rgba(255,255,255,.1); }
.section { padding: 56px 0; }
.section-alt { background: #f5f8ff; }
.section-title { text-align: center; margin-bottom: 56px; }
.section-title .sec-label {
  display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: 4px;
  color: #006AFF; background: linear-gradient(135deg, #eff6ff, #dbeafe); padding: 6px 18px; border-radius: 20px; margin-bottom: 14px;
}
.section-title h2 { font-size: 2.2rem; font-weight: 800; color: #0f1f3e; margin-bottom: 10px; }
.section-title p { font-size: 1.05rem; color: #64748b; }
.intro-row { display: grid; grid-template-columns: 1fr 360px; gap: 56px; align-items: center; }
.intro-text .section-label { font-size: .75rem; font-weight: 700; letter-spacing: 3px; color: #006AFF; margin-bottom: 12px; }
.intro-text h2 { font-size: 2rem; font-weight: 800; color: #0f1f3e; margin-bottom: 16px; }
.intro-text p { font-size: .95rem; color: #64748b; line-height: 1.9; margin-bottom: 24px; }
.intro-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.intro-tag { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 8px; font-size: .88rem; color: #334155; background: #eff6ff; border: 1px solid #bfdbfe; }
.intro-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat-card { background: linear-gradient(135deg, #eff6ff, #dbeafe); border-radius: 16px; padding: 24px; text-align: center; }
.stat-num { font-size: 2.4rem; font-weight: 900; color: #006AFF; line-height: 1; margin-bottom: 8px; }
.stat-num span { font-size: 1.4rem; }
.stat-label { font-size: .82rem; color: #64748b; }
.advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.adv-card { background: #fff; border-radius: 18px; padding: 36px 28px 32px; text-align: center; box-shadow: 0 4px 24px rgba(0,0,0,.05); border: 1.5px solid #f0f4ff; transition: transform .3s, box-shadow .3s; position: relative; overflow: hidden; }
.adv-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, #006AFF, #00AEF3); opacity: 0; transition: opacity .3s; }
.adv-card:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(0,106,255,.12); }
.adv-card:hover::before { opacity: 1; }
.adv-icon { width: 72px; height: 72px; background: linear-gradient(135deg, #eff6ff, #dbeafe); border-radius: 18px; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 2rem; }
.adv-card h3 { font-size: 1.15rem; font-weight: 700; color: #1e293b; margin-bottom: 12px; }
.adv-card p { font-size: .9rem; color: #64748b; line-height: 1.75; }
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.scenario-card { background: #fff; border-radius: 20px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,.05); border: 1.5px solid #f0f4ff; transition: transform .3s; }
.scenario-card:hover { transform: translateY(-4px); }
.scenario-img { height: 180px; background: linear-gradient(135deg, #051a4a, #006AFF); display: flex; align-items: center; justify-content: center; font-size: 3rem; color: #fff; }
.scenario-body { padding: 28px; }
.scenario-body h3 { font-size: 1.2rem; font-weight: 700; color: #0f1f3e; margin-bottom: 10px; }
.scenario-body p { font-size: .9rem; color: #64748b; line-height: 1.7; }
.arch-section { background: linear-gradient(135deg, #051a4a 0%, #0a2d6e 60%, #003d99); padding: 80px 0; position: relative; overflow: hidden; }
.arch-section::before { content: ''; position: absolute; inset: 0; background: url("data:image/svg+xml,%3Csvg width='80' height='80' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='40' cy='40' r='1' fill='rgba(255,255,255,.04)'/%3E%3C/svg%3E") repeat; background-size: 80px 80px; }
.arch-section .section-title { color: #fff; }
.arch-section .section-title .sec-label { background: rgba(255,255,255,.1); color: #00AEF3; }
.arch-section .section-title h2 { color: #fff; }
.arch-section .section-title p { color: rgba(255,255,255,.55); }
.topo-row { display: flex; justify-content: center; align-items: center; gap: 40px; flex-wrap: wrap; }
.topo-node { background: rgba(255,255,255,.1); backdrop-filter: blur(10px); border: 1.5px solid rgba(255,255,255,.2); border-radius: 16px; padding: 24px 32px; text-align: center; color: #fff; }
.topo-node .node-icon { font-size: 2.2rem; margin-bottom: 8px; }
.topo-node h4 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.topo-node p { font-size: .8rem; opacity: .6; }
.topo-arrow { font-size: 2.5rem; color: #00AEF3; }
.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.value-card { background: #fff; border-radius: 16px; padding: 32px 24px; box-shadow: 0 4px 20px rgba(0,0,0,.05); border: 1.5px solid #f0f4ff; }
.value-num { font-size: 3rem; font-weight: 900; color: #e2e8f0; margin-bottom: 16px; }
.value-content h3 { font-size: 1.15rem; font-weight: 700; color: #0f1f3e; margin-bottom: 10px; }
.value-content p { font-size: .88rem; color: #64748b; line-height: 1.75; }
.cta-section { padding: 80px 0; background: linear-gradient(135deg, #eff6ff, #f0fdf4); text-align: center; }
.cta-section h2 { font-size: 2rem; font-weight: 800; color: #0f1f3e; margin-bottom: 14px; }
.cta-section p { font-size: 1.05rem; color: #64748b; margin-bottom: 36px; }
.cta-section .hero-btn { display: inline-block; padding: 16px 56px; border-radius: 50px; font-size: 1.05rem; font-weight: 700; text-decoration: none; background: linear-gradient(135deg, #006AFF, #0052CC); color: #fff; box-shadow: 0 8px 28px rgba(0,106,255,.3); transition: all .3s; }
.cta-section .hero-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0,106,255,.4); }
@media (max-width: 1024px) {
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .intro-row { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .advantages-grid, .scenario-grid, .value-grid { grid-template-columns: 1fr; }
  .banner-content h1 { font-size: 2rem; }
  .intro-stats { grid-template-columns: 1fr 1fr; }
}