/* ============================================================
   v2.0.2-hotfix32：首页 / 登录 / 注册页 主题适配
   - 彻底删自己的 :root 私有变量
   - 全部颜色统一走 theme.css (--accent / --bg-page / --text-primary 等)
   - 深色 + 明亮主题下视觉一致
   ============================================================ */

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%;
  min-height: 100vh;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text-primary);
  background: var(--bg-page);
  overflow-x: hidden;
}

/* —— 动态渐变背景 —— */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: -2;
  background: var(--bg-decor-primary);
  animation: bgShift 20s ease-in-out infinite alternate;
}
@keyframes bgShift {
  0%   { filter: hue-rotate(0deg); }
  100% { filter: hue-rotate(20deg); }
}

/* —— 网格线 —— */
body::after {
  content: '';
  position: fixed; inset: 0; z-index: -1;
  background-image: var(--bg-grid-primary);
  background-size: 60px 60px;
  mask-image: var(--mask-fade);
  -webkit-mask-image: var(--mask-fade);
}

main {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
}

/* —— 顶部 Logo + 标题 —— */
.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 36px;
  text-align: center;
}
.logo-slot {
  width: 96px; height: 96px;
  border-radius: 24px;
  background: var(--bg-card-translucent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  box-shadow: var(--shadow-hover);
  position: relative;
  overflow: hidden;
}
.logo-slot::before {
  content: '';
  position: absolute; inset: 0;
  background: conic-gradient(from 0deg, transparent 0deg, var(--accent) 30deg, transparent 60deg);
  opacity: 0.4;
  animation: rotate 8s linear infinite;
}
@keyframes rotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.logo-slot svg { position: relative; z-index: 1; }

.system-name {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 4px;
  background: var(--gradient-logo);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin-bottom: 6px;
  text-shadow: var(--shadow-btn-hover);
}
.system-tagline {
  color: var(--text-muted);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* —— 状态条 —— */
.status-bar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-card-translucent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 14px;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--success-text);
  box-shadow: 0 0 8px var(--success-text);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

/* —— 入口卡片 —— */
.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 960px;
  width: 100%;
  margin-bottom: 32px;
}
.card {
  position: relative;
  padding: 28px 24px;
  background: var(--bg-card-translucent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 16px;
  cursor: pointer;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute; top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, var(--accent-bg-hover), transparent);
  transition: left 0.6s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-btn-hover);
}
.card:hover::before { left: 100%; }
.card-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--gradient-icon);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  box-shadow: var(--shadow-btn-hover);
}
.card-icon svg { stroke: var(--text-inverse); }
.card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}
.card-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}
.card-link {
  margin-top: 16px;
  font-size: 12px;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.card-link::after { content: '→'; transition: transform 0.3s; }
.card:hover .card-link::after { transform: translateX(4px); }

/* —— 底部信息 —— */
.footer {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 1px;
}

/* —— 响应式 —— */
@media (max-width: 768px) {
  .cards { grid-template-columns: 1fr; gap: 14px; }
  .system-name { font-size: 24px; letter-spacing: 2px; }
  .logo-slot { width: 72px; height: 72px; border-radius: 18px; }
  .logo-slot svg { width: 36px; height: 36px; }
  main { padding: 24px 16px; }
}
@media (min-width: 769px) and (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
}