/* ===== XILET · 头部 / 导航 ===== */

/* 顶部信息条 */
.topbar{background:var(--bg-soft);border-bottom:1px solid var(--line);font-size:var(--fs-xs);color:var(--muted)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:34px;gap:16px;overflow:hidden}
.topbar-left{display:flex;align-items:center;gap:20px;white-space:nowrap;overflow:hidden}
.topbar-item{display:inline-flex;align-items:center;gap:6px;transition:color var(--ease-fast)}
.topbar-item:hover{color:var(--blue-700)}
.topbar-item svg{width:13px;height:13px;stroke:var(--blue-600);fill:none;stroke-width:1.6;flex-shrink:0}
.topbar-right{color:var(--faint);white-space:nowrap}
@media(max-width:767px){
  .topbar .wrap{height:30px}
  .topbar-left .topbar-item:nth-child(2),.topbar-left .topbar-item:nth-child(3){display:none}
  .topbar-right{display:none}
}

/* 主视觉带 */
.masthead{background:var(--blue-700);color:#fff;position:relative;overflow:hidden}
.masthead::after{content:"";position:absolute;right:0;top:0;bottom:0;width:40%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.04));pointer-events:none}
.masthead .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:18px;padding-bottom:18px;position:relative;z-index:1}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:40px;height:40px;flex-shrink:0;display:grid;place-items:center;border:1.5px solid var(--gold-lt);border-radius:var(--radius-sm)}
.brand-mark span{font-family:var(--font-en);font-size:16px;font-weight:700;color:var(--gold-lt);letter-spacing:.05em}
.brand-text b{display:block;font-family:var(--font-title);font-size:19px;font-weight:700;letter-spacing:.06em;line-height:1.3;color:#fff}
.brand-text i{display:block;font-style:normal;font-size:11px;letter-spacing:.18em;color:rgba(255,255,255,.62);margin-top:2px}
.masthead-slogan{font-size:13px;color:rgba(255,255,255,.78);letter-spacing:.1em;text-align:right;white-space:nowrap}
@media(max-width:767px){.masthead-slogan{display:none}.brand-text b{font-size:17px}}

/* 主导航 */
.nav{background:var(--blue-700);border-top:1px solid rgba(255,255,255,.1);position:relative;z-index:20}
.nav .wrap{display:flex;align-items:stretch;height:50px;overflow-x:auto;scrollbar-width:none}
.nav .wrap::-webkit-scrollbar{display:none}
.nav-link{display:flex;align-items:center;padding:0 20px;font-size:15px;color:rgba(255,255,255,.82);white-space:nowrap;position:relative;transition:color var(--ease-fast)}
.nav-link::after{content:"";position:absolute;left:20px;right:20px;bottom:0;height:3px;background:var(--gold-lt);transform:scaleX(0);transition:transform var(--ease-normal)}
.nav-link:hover{color:#fff}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:#fff;font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
@media(max-width:767px){
  .nav{position:sticky;top:0;box-shadow:0 2px 6px rgba(10,37,64,.12)}
  .nav .wrap{height:46px;padding:0 4px}
  .nav-link{padding:0 14px;font-size:14px}
  .nav-link::after{left:14px;right:14px;height:2px}
}