:root{
  --bg:#05060a;
  --glass: rgba(255,255,255,0.04);
  --accent:#00e5ff;
  --accent2:#7c4dff;
  --muted:rgba(255,255,255,0.6);
  --glass-border: rgba(255,255,255,0.06);
  --blur: 8px;
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,'Helvetica Neue',Arial;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:linear-gradient(180deg,#02030a 0%, #071023 60%);
  color:#e7f6ff;
  overflow:hidden;
}

/* Canvas 覆盖整个背景 */
#particles{
  position:fixed;
  inset:0;
  width:100%;
  height:100%;
  z-index:0;
  display:block;
  background: radial-gradient(ellipse at top left, rgba(124,77,255,0.06), transparent 20%),
              radial-gradient(ellipse at bottom right, rgba(0,229,255,0.04), transparent 15%);
}

/* 主体容器 */
.app-shell{
  position:relative;
  z-index:2;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  backdrop-filter: blur(var(--blur));
}

/* 顶部 */
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:18px 28px;
  border-bottom:1px solid var(--glass-border);
  background:linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
  box-shadow: 0 6px 24px rgba(2,6,23,0.4);
}

.logo{display:flex;gap:12px;align-items:center}
.emblem{
  width:56px;height:56px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#021; font-family:'Orbitron',sans-serif;
  box-shadow:0 6px 20px rgba(124,77,255,0.18), inset 0 -6px 20px rgba(0,0,0,0.25);
  font-size:20px;
}
.title{font-weight:700;font-family:'Orbitron',sans-serif;font-size:18px}
.subtitle{font-size:12px;color:var(--muted)}

.nav{display:flex;gap:14px}
.nav-link{
  color:var(--muted);
  padding:8px 12px;border-radius:8px;text-decoration:none;
  transition:all .18s;
}
.nav-link:hover{background:rgba(255,255,255,0.02);color:var(--accent)}

.actions{display:flex;align-items:center;gap:8px}
.user-display{font-size:13px;color:var(--muted)}
.btn{
  background:linear-gradient(90deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  color:#eaffff;border:1px solid rgba(255,255,255,0.04);
  padding:8px 12px;border-radius:8px;cursor:pointer;font-weight:600;
}
.btn.ghost{background:transparent;border:1px dashed rgba(255,255,255,0.04)}
.btn.hidden{display:none}

/* 主内容 */
.main-content{
  padding:28px;
  display:block;
  z-index:2;
  flex:1;
  overflow:auto;
}

/* 首页卡片 */
.hero{
  display:flex;gap:24px;align-items:center;justify-content:space-between;
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border:1px solid var(--glass-border);
  border-radius:14px;padding:20px;
  box-shadow: 0 8px 40px rgba(3,6,20,0.5);
}
.hero-left{flex:1}
.hero-title{font-family:'Orbitron',sans-serif;font-size:32px;margin:0;color:linear-gradient}
.hero-desc{color:var(--muted);margin-top:8px}
.hero-actions{margin-top:18px;display:flex;gap:12px}
.glass-card{
  background:var(--glass);
  border-radius:12px;padding:12px;border:1px solid var(--glass-border);
}

/* 列表和表单 */
.grid{display:grid;gap:12px}
.card{background:linear-gradient(180deg, rgba(255,255,255,0.015), transparent); padding:12px;border-radius:10px;border:1px solid var(--glass-border)}
.news-item{padding:12px;border-radius:8px;border-left:3px solid rgba(0,229,255,0.12)}

/* 论坛 */
.forum-thread{padding:10px;border-radius:8px;background:rgba(255,255,255,0.015);display:flex;justify-content:space-between;align-items:center}
.forum-title{font-weight:600}

/* 表单样式 */
.form-row{margin-top:8px;display:flex;flex-direction:column}
label{font-size:12px;color:var(--muted);margin-bottom:6px}
input,textarea,select{padding:8px;border-radius:8px;border:1px solid rgba(255,255,255,0.06);background:transparent;color:inherit}
textarea{min-height:96px;resize:vertical}

/* Footer */
.footer{text-align:center;padding:18px;color:var(--muted);font-size:13px;border-top:1px solid var(--glass-border);background:linear-gradient(180deg, transparent, rgba(0,0,0,0.15))}

/* 模态 */
.modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(2,4,12,0.55);z-index:40}
.modal.hidden{display:none}
.modal-card{width:420px;background:linear-gradient(180deg, rgba(255,255,255,0.02), transparent);padding:18px;border-radius:12px;border:1px solid var(--glass-border)}
.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:12px}

/* 小屏适配 */
@media(max-width:820px){
  .topbar{flex-direction:column;align-items:flex-start;gap:10px}
  .hero{flex-direction:column;align-items:flex-start}
  .modal-card{width:94%}
}