/* ============================================
   VPN 移动端样式
   ============================================ */

.vpn-mobile {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  overflow-x: hidden;
  font-family: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", -apple-system, sans-serif;
}

.vpn-section {
  width: 100%;
  padding: 40px 0;
  box-sizing: border-box;
}

.vpn-container {
  width: 100%;
  padding: 0 16px;
  box-sizing: border-box;
}

.vpn-bg-gray { background: #f5f7fa; }
.vpn-bg-white { background: #ffffff; }
.vpn-bg-dark {
  background: linear-gradient(135deg, #0f172a, #1e40af 50%, #1e3a8a);
  color: #ffffff;
}

.vpn-section-title {
  font-size: 20px;
  font-weight: 700;
  color: #1a1a2e;
  text-align: center;
  line-height: 1.4;
  margin: 0 0 8px;
}

.vpn-section-desc {
  font-size: 14px;
  color: #64748b;
  text-align: center;
  line-height: 1.6;
  margin: 0 auto 24px;
  max-width: 90%;
}

/* 区块2：标签页切换 */
.vpn-tabs {
  display: flex;
  background: #f0f4ff;
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 20px;
}

.vpn-tab {
  flex: 1;
  text-align: center;
  padding: 10px 4px;
  font-size: 14px;
  font-weight: 500;
  color: #64748b;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.vpn-tab.active {
  background: #fff;
  color: #0067FC;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(0,103,252,0.12);
}

.vpn-tab-panel { display: none; }
.vpn-tab-panel.active { display: block; }

.vpn-scene-card {
  background: #fff;
  border-radius: 12px;
  padding: 0 0 18px 0;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
  overflow: hidden;
}

.vpn-scene-img {
  width: 100%;
  display: block;
}

.vpn-scene-card > h3 {
  margin: 18px 18px 4px 18px;
}

.vpn-scene-card > .vpn-scene-subtitle {
  margin: 0 18px 12px 18px;
}

.vpn-scene-title {
  font-size: 18px;
  font-weight: 700;
  color: #1a1a2e;
  margin: 0 0 4px;
}

.vpn-scene-subtitle {
  font-size: 14px;
  color: #0067FC;
  margin: 0 0 16px;
}

.vpn-scene-card ul {
  margin: 0;
  padding-left: 18px;
}

.vpn-scene-card li {
  font-size: 14px;
  color: #64748b;
  line-height: 1.8;
  margin-bottom: 6px;
}

.vpn-scene-desc {
  font-size: 14px;
  color: #64748b;
  line-height: 1.8;
  white-space: pre-line;
}

.vpn-scene-list {
  margin: 0 18px;
  padding: 0;
  list-style: none;
}

.vpn-scene-list li {
  font-size: 14px;
  color: #64748b;
  line-height: 1.8;
  margin-bottom: 8px;
  padding-left: 20px;
  position: relative;
}

.vpn-scene-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #0067FC;
  font-weight: 700;
}

/* 区块3：4个技术卡片 */
.vpn-tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.vpn-tech-card {
  background: #fff;
  border-radius: 12px;
  padding: 24px 12px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}

.vpn-tech-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

.vpn-tech-title {
  font-size: 15px;
  font-weight: 700;
  color: #1a1a2e;
  margin: 0 0 6px;
}

.vpn-tech-desc {
  font-size: 13px;
  color: #64748b;
  line-height: 1.5;
  margin: 0;
}

/* 深色技术卡片 */
.vpn-tech-card-dark {
  background: rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 20px 12px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.12);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.vpn-tech-card-dark .vpn-tech-icon {
  text-align: center;
  display: block;
}

.vpn-tech-title-dark {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 6px;
  text-align: center;
}

.vpn-tech-desc-dark {
  font-size: 13px;
  color: rgba(255,255,255,0.8);
  line-height: 1.5;
  margin: 0;
  text-align: center;
}

.vpn-mobile img { max-width: 100%; height: auto; }
html, body { max-width: 100%; overflow-x: hidden; }