:root {
  --bg: #0b1020;
  --bg-soft: #0f1630;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(120, 142, 255, 0.24);
  --text: #e8ecff;
  --muted: #a9b3d6;
  --brand: #6c8bff;
  --brand-2: #7ce3ff;
  --brand-3: #b07cff;
  --danger: #ef4444;
  --success: #34d399;
  --warning: #facc15;
  --focus: 0 0 0 3px rgba(124, 227, 255, 0.28);
  --radius: 14px;
  --radius-sm: 12px;
  --shadow-1: 0 10px 28px rgba(9, 16, 36, 0.28);
  --shadow-2: 0 14px 36px rgba(9, 16, 36, 0.38);
  --container: 1120px;
}
* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  background: radial-gradient(
      1200px 600px at 10% -10%,
      rgba(124, 227, 255, 0.08),
      transparent 60%
    ),
    radial-gradient(
      1200px 800px at 110% 10%,
      rgba(176, 124, 255, 0.08),
      transparent 60%
    ),
    linear-gradient(180deg, #0a0e1d, #0b1020 40%, #0b1020 100%);
  color: var(--text);
  font: 14px/1.6 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto,
    "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a {
  color: var(--brand-2);
  text-decoration: none;
}
a:hover {
  color: #cfe7ff;
}
img {
  max-width: 100%;
  display: block;
}
h1,
h2,
h3,
h4,
h5 {
  margin: 0 0 8px;
  line-height: 1.35;
}
p {
  margin: 6px 0;
  color: var(--text);
}
.muted {
  color: var(--muted);
}

/* 容器与网格 */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 16px;
}
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.row-full {
  display: grid;
  gap: 8px;
}
@media (max-width: 900px) {
  .row {
    grid-template-columns: 1fr;
  }
}

/* 站点头部与导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11, 16, 32, 0.7);
  backdrop-filter: saturate(120%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.brand {
  color: #eaf1ff;
  font-weight: 700;
  letter-spacing: 0.2px;
  padding: 6px 10px;
  border-radius: 10px;
  background: linear-gradient(
    180deg,
    rgba(124, 227, 255, 0.12),
    rgba(176, 124, 255, 0.12)
  );
  border: 1px solid var(--border);
}
.nav a {
  color: #cfd7ff;
  margin-left: 12px;
  padding: 6px 10px;
  border-radius: 10px;
}
.nav a:hover {
  background: var(--surface-2);
  color: #eef3ff;
}
.nav a.active {
  background: linear-gradient(
    180deg,
    rgba(124, 227, 255, 0.16),
    rgba(176, 124, 255, 0.16)
  );
  color: #fff;
  border: 1px solid var(--border);
}

/* 页脚 */
.site-footer {
  margin-top: 28px;
  padding: 18px 0;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}
.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.site-footer .muted {
  font-size: 12px;
}

/* 页面头 */
.page-header {
  margin: 18px 0 14px;
}
.page-header h1 {
  font-size: 28px;
  background: linear-gradient(90deg, #cfe7ff, #efebff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.page-header p {
  color: var(--muted);
}

/* 卡片与版块 */
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 16px;
  box-shadow: var(--shadow-1);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover {
  box-shadow: var(--shadow-2);
}
.cards {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 1000px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .cards {
    grid-template-columns: 1fr;
  }
}

/* 表单与输入（基础态，增强态在 c-portal.css） */
label {
  color: #cfd7ff;
  font-size: 13px;
}
input,
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  outline: none;
  transition: border 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
input:focus,
select:focus,
textarea:focus {
  border-color: var(--brand-2);
  box-shadow: var(--focus);
  background: rgba(255, 255, 255, 0.06);
}
.form-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.form-status {
  color: var(--muted);
  font-size: 12px;
}

/* 输入错误态（供 JS 切换 .error） */
input.error,
select.error,
textarea.error {
  border-color: rgba(239, 68, 68, 0.7);
  background: rgba(239, 68, 68, 0.08);
}

/* 按钮体系（基础） */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  min-height: 40px;
  gap: 8px;
  border-radius: 12px;
  border: 1px solid var(--border);
  color: #eaf1ff;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.06),
    rgba(255, 255, 255, 0.02)
  );
  cursor: pointer;
  user-select: none;
  transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s ease,
    border-color 0.2s ease;
  text-align: center;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-1);
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.1),
    rgba(255, 255, 255, 0.04)
  );
}
.btn:active {
  transform: translateY(0);
}
.btn.primary {
  background: linear-gradient(180deg, #6c8bff, #4e69f5);
  border-color: rgba(108, 139, 255, 0.8);
  color: #07112b;
  font-weight: 700;
}
.btn.primary:hover {
  box-shadow: 0 10px 26px rgba(108, 139, 255, 0.35);
}
.btn.ghost {
  background: transparent;
  border-color: var(--border);
}
.btn.ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}
.btn.danger {
  background: linear-gradient(180deg, #ef4444, #dc2626);
  border-color: rgba(220, 38, 38, 0.8);
}
.btn.small {
  padding: 7px 12px;
  min-height: 34px;
  font-size: 14px;
}

/* 提示条（基础） */
.alert {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}
.alert.success {
  background: rgba(52, 211, 153, 0.15);
  border-color: rgba(52, 211, 153, 0.45);
  color: #c7ffe9;
}
.alert.error {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.45);
  color: #ffd6d3;
}
.alert.warn {
  background: rgba(250, 204, 21, 0.15);
  border-color: rgba(250, 204, 21, 0.45);
  color: #fff2cc;
}

/* 工具类 */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
@media (max-width: 900px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}
.center {
  display: flex;
  align-items: center;
  justify-content: center;
}
.space-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mt-8 {
  margin-top: 8px;
}
.mt-12 {
  margin-top: 12px;
}
.mt-16 {
  margin-top: 16px;
}
.mt-24 {
  margin-top: 24px;
}
.mb-8 {
  margin-bottom: 8px;
}
.mb-12 {
  margin-bottom: 12px;
}
.mb-16 {
  margin-bottom: 16px;
}
.mb-24 {
  margin-bottom: 24px;
}
.hidden {
  display: none !important;
}

/* 表格（如有列表页） */
table {
  width: 100%;
  border-collapse: collapse;
  border-spacing: 0;
}
th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
thead th {
  color: #cfd7ff;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.04);
  position: sticky;
  top: 56px;
  z-index: 1;
}

/* 卡片尺寸变体 */
.card-sm {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  padding: 12px;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.card-sm:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
  background: rgba(255, 255, 255, 0.05);
}

/* 响应式适配 */
@media (max-width: 720px) {
  .site-header .container {
    height: 54px;
  }
  .brand {
    font-size: 14px;
  }
  .nav a {
    margin-left: 8px;
    padding: 6px 8px;
  }
  .page-header h1 {
    font-size: 22px;
  }
}