/* ============================================================
   主题 22 · 蓝色极光 (Blue Aurora)
   蓝色系极光流光，冰蓝透明如极地冰川夜景摄影集
   ============================================================ */
:root{
  --c-bg:#050a1a;
  --c-bg-grad:radial-gradient(circle at 18% 14%,rgba(59,130,246,.22),transparent 45%),
              radial-gradient(circle at 82% 22%,rgba(6,182,212,.16),transparent 45%),
              radial-gradient(circle at 50% 95%,rgba(96,165,250,.13),transparent 50%),
              linear-gradient(165deg,#050a1a,#0c1430);
  --c-surface:rgba(14,24,52,.72);
  --c-surface-2:rgba(22,36,68,.60);
  --c-text:#eef4ff;
  --c-muted:#8ea6c8;
  --c-accent:#3b82f6;
  --c-accent-2:#06b6d4;
  --c-on-accent:#050a1a;
  --c-border:rgba(59,130,246,.16);
  --font-display:'Trebuchet MS','PingFang SC',sans-serif;
  --hero-grad:linear-gradient(115deg,#3b82f6,#06b6d4 45%,#60a5fa);
  --nav-bg:rgba(5,10,26,.60);
  --nav-blur:blur(18px);
  --shadow:0 22px 55px rgba(59,130,246,.30);
  --radius:18px;
}
/* 蓝色极光层 —— 三道冰蓝极光缓慢漂移 */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(60% 45% at 18% 12%,rgba(59,130,246,.22),transparent 70%),
    radial-gradient(55% 40% at 50% 6%, rgba(6,182,212,.18),transparent 70%),
    radial-gradient(60% 45% at 82% 14%,rgba(96,165,250,.18),transparent 70%);
  filter:blur(8px);
  animation:aurorabDrift 20s ease-in-out infinite alternate;
}
@keyframes aurorabDrift{
  from{transform:translate3d(-3%,0,0) scale(1.04)}
  to{transform:translate3d(3%,-2%,0) scale(1.08)}
}
/* 标题：纤细字重 + 渐变流光闪烁 */
.hero h1{font-weight:300;letter-spacing:-1.5px}
.hero h1 .grad{
  background:linear-gradient(115deg,#3b82f6,#06b6d4 40%,#60a5fa 70%,#3b82f6);
  background-size:220% auto;-webkit-background-clip:text;background-clip:text;color:transparent;
  font-weight:800;animation:aurorabShimmer 7s linear infinite;
}
@keyframes aurorabShimmer{to{background-position:220% center}}
/* 玻璃质感卡片 */
.album-card{backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(59,130,246,.18)}
.album-card:hover{box-shadow:0 0 0 1px rgba(6,182,212,.45),0 34px 70px rgba(59,130,246,.40);border-color:rgba(6,182,212,.50)}
.album-info{background:rgba(12,20,48,.50)}
.album-info h3{font-weight:600}
.album-badge{background:linear-gradient(115deg,#3b82f6,#06b6d4);color:#050a1a;border:none}
.album-meta{border-top-color:rgba(59,130,246,.14)}
.album-meta .view{color:#06b6d4}
.section-head .kicker{background:linear-gradient(115deg,#3b82f6,#06b6d4);-webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:5px}
.about-visual{background:linear-gradient(135deg,#1e3a8a,#3b82f6 50%,#06b6d4);background-size:200% auto;animation:aurorabShimmer 9s linear infinite;box-shadow:0 0 60px rgba(59,130,246,.40)}
.eyebrow{background:linear-gradient(115deg,#3b82f6,#06b6d4,#60a5fa) !important;color:#050a1a !important;letter-spacing:3px}
.btn.primary{background:linear-gradient(115deg,#3b82f6,#06b6d4);color:#050a1a;box-shadow:0 12px 30px rgba(59,130,246,.45)}
.btn.ghost{background:rgba(255,255,255,.05);color:#eef4ff;border-color:rgba(59,130,246,.22)}
.divider{background:linear-gradient(115deg,#3b82f6,#06b6d4)}
.footer{background:#020610;border-top:1px solid rgba(59,130,246,.10)}
.logo-mark{box-shadow:0 6px 24px rgba(59,130,246,.55)}
.nav-menu a:hover{color:#3b82f6;background:rgba(59,130,246,.10)}
.ts-swatch.ts-aurorab{background:linear-gradient(135deg,#3b82f6,#06b6d4,#60a5fa)}
.shape.s1{background:#3b82f6 !important;opacity:.22 !important}
.shape.s2{background:#06b6d4 !important;opacity:.20 !important}