/* ============================================================
   铁塔提料·在线版 · 页面横幅
   只作用于 .tower-banner，不改动工作台其它样式
   ============================================================ */

.tower-banner {
  position: relative;
  flex: 0 0 auto;              /* 作为 #app 的 flex 子项，固定高度不参与伸缩 */
  align-self: stretch;
  width: 100%;
  max-width: none;
  box-sizing: border-box;
  padding: 18px 0;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(118deg, #062352 0%, #0A3D8F 44%, #1168EA 100%);
  border-bottom: 1px solid rgba(10, 40, 90, .28);
}

/* 工程蓝图网格纹理，右下渐隐 */
.tower-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(140, 190, 255, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140, 190, 255, .10) 1px, transparent 1px);
  background-size: 38px 38px;
  -webkit-mask-image: radial-gradient(125% 150% at 10% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(125% 150% at 10% 0%, #000 0%, transparent 72%);
  pointer-events: none;
}

/* 右上光晕 */
.tower-banner::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -140px;
  width: 430px;
  height: 430px;
  z-index: -1;
  background: radial-gradient(circle, rgba(52, 199, 255, .32), transparent 66%);
  pointer-events: none;
}

.tower-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  width: 100%;
  max-width: 1280px;
  box-sizing: border-box;
  padding: 0 24px;
  margin: 0 auto;
}

.tower-banner-copy h1 {
  margin: 0 0 5px;
  font-size: 25px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: .6px;
  background: linear-gradient(96deg, #FFFFFF 18%, #9FD0FF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tower-banner-copy p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: .2px;
  color: #A8C8EE;
}

.tower-banner-tags {
  display: flex;
  flex: 0 0 auto;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tower-banner-tags li {
  padding: 7px 14px;
  font-size: 12px;
  font-weight: 600;
  color: #D5E8FF;
  white-space: nowrap;
  background: rgba(255, 255, 255, .10);
  border: 1px solid rgba(150, 200, 255, .28);
  border-radius: 99px;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

/* 收起按钮 */
.tower-banner-close {
  position: absolute;
  top: 9px;
  right: 11px;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  padding: 0;
  font-size: 15px;
  line-height: 1;
  color: #B8D3F2;
  background: rgba(255, 255, 255, .10);
  border: 0;
  border-radius: 7px;
  cursor: pointer;
  transition: background .16s, color .16s;
}
.tower-banner-close:hover {
  color: #fff;
  background: rgba(255, 255, 255, .24);
}

.tower-banner.is-hidden { display: none; }

/* 窄屏适配 */
@media (max-width: 1280px) {
  .tower-banner-tags li:nth-child(3) { display: none; }
}
@media (max-width: 960px) {
  .tower-banner { padding-top: 14px; padding-bottom: 14px; }
  .tower-banner-inner { padding-right: 18px; padding-left: 18px; }
  .tower-banner-copy h1 { font-size: 20px; }
  .tower-banner-copy p { font-size: 12px; }
  .tower-banner-tags { display: none; }
}
@media (max-width: 620px) {
  .tower-banner { padding-top: 12px; padding-bottom: 12px; }
  .tower-banner-inner { padding-right: 16px; padding-left: 16px; }
  .tower-banner-copy h1 { font-size: 17px; letter-spacing: .3px; }
  .tower-banner-copy p { display: none; }
}

/* 横幅右侧：标签 + 操作帮助按钮 */
.tower-banner-side {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.tower-banner-help {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 14px;
  border: 1px solid rgba(180, 215, 255, .5);
  border-radius: 999px;
  color: #EAF4FF;
  background: rgba(255, 255, 255, .10);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease;
}
.tower-banner-help:hover {
  background: rgba(255, 255, 255, .2);
  border-color: rgba(210, 235, 255, .8);
}
.tower-banner-help span { white-space: nowrap; }
@media (max-width: 860px) {
  .tower-banner-side { gap: 8px; }
  .tower-banner-help { height: 30px; padding: 0 11px; font-size: 11.5px; }
}