:root {
    --bg-primary: #0b1120;
    --bg-secondary: #0f172a;
    --bg-card: rgba(255,255,255,0.03);
    --bg-card-hover: rgba(255,255,255,0.06);
    --border-color: rgba(255,255,255,0.08);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #6366f1;
    --accent-secondary: #a855f7;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(11,17,32,0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.navbar-brand {
    font-size: 20px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

.navbar-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.navbar-nav a:hover {
    color: var(--text-primary);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-email {
    color: var(--text-primary) !important;
    font-weight: 500;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 16px rgba(99,102,241,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99,102,241,0.5);
}

.btn-secondary {
    background: rgba(255,255,255,0.08);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.12);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-block { width: 100%; }

/* ========== Hero ========== */
.hero {
    padding: 140px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%; left: 50%;
    transform: translateX(-50%);
    width: 800px; height: 800px;
    background: radial-gradient(circle, rgba(99,102,241,0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff 0%, #c4b5fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
}

/* ========== 数据统计 ========== */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 40px 0;
}

.stat-item {
    text-align: center;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.3s;
}

.stat-item:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
}

.stat-num {
    font-size: 32px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ========== 区块标题 ========== */
.section-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 32px;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-top: -24px;
    margin-bottom: 40px;
}

/* ========== 模型列表 ========== */
.models-section {
    padding: 60px 0;
}

.provider-group {
    margin-bottom: 40px;
}

.provider-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 16px;
    padding-left: 8px;
    border-left: 3px solid var(--accent-primary);
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.model-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.model-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity 0.3s;
}

.model-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: rgba(99,102,241,0.3);
}

.model-card:hover::before {
    opacity: 1;
}

.model-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
}

.model-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.model-badge {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(99,102,241,0.15);
    color: #a5b4fc;
    font-size: 12px;
    border-radius: 20px;
    font-family: monospace;
}

/* ========== 页脚 ========== */
.footer {
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 13px;
}

/* ========== 弹窗 ========== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    padding: 20px;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 440px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform 0.3s;
    box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    transition: color 0.3s;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal form {
    padding: 24px;
}

/* ========== 表单 ========== */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 10px 14px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s;
    outline: none;
}

.form-input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

.form-input::placeholder {
    color: var(--text-muted);
}

/* ========== 标签页 ========== */
.tabs {
    display: flex;
    gap: 4px;
    padding: 0 24px;
    border-bottom: 1px solid var(--border-color);
}

.tab {
    padding: 12px 16px;
    font-size: 14px;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all 0.3s;
}

.tab.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

/* ========== 卡片（通用） ========== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.3s;
}

.card:hover {
    background: var(--bg-card-hover);
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

/* ========== 表格 ========== */
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.table th,
.table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    color: var(--text-secondary);
}

.table tbody tr:hover td {
    color: var(--text-primary);
}

/* ========== 代码块 ========== */
.code-block {
    background: #0a0f1c;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px;
    position: relative;
    overflow-x: auto;
}

.code-block pre {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 13px;
    line-height: 1.6;
    color: #a5b4fc;
    white-space: pre-wrap;
    word-break: break-all;
}

.copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 10px;
    background: rgba(255,255,255,0.1);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s;
}

.copy-btn:hover {
    background: rgba(255,255,255,0.15);
    color: var(--text-primary);
}

/* ========== Toast ========== */
.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    z-index: 3000;
    animation: toastIn 0.3s ease;
}

.toast.success {
    background: rgba(34,197,94,0.15);
    color: var(--success);
    border: 1px solid rgba(34,197,94,0.3);
}

.toast.error {
    background: rgba(239,68,68,0.15);
    color: var(--danger);
    border: 1px solid rgba(239,68,68,0.3);
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-10px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ========== 状态标签 ========== */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.status-badge::before {
    content: '';
    width: 6px; height: 6px;
    border-radius: 50%;
    display: inline-block;
}

.status-normal {
    background: rgba(34,197,94,0.15);
    color: var(--success);
}

.status-normal::before { background: var(--success); }

.status-banned {
    background: rgba(239,68,68,0.15);
    color: var(--danger);
}

.status-banned::before { background: var(--danger); }

.status-vip {
    background: rgba(168,85,247,0.15);
    color: #c4b5fd;
}

.status-vip::before { background: #a855f7; }

/* ========== 用户中心布局 ========== */
.user-layout {
    display: flex;
    min-height: 100vh;
}

.user-sidebar {
    width: 240px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 24px 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-brand {
    padding: 0 24px 24px;
    font-size: 18px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.sidebar-menu li a:hover,
.sidebar-menu li a.active {
    background: rgba(99,102,241,0.08);
    color: var(--text-primary);
    border-left-color: var(--accent-primary);
}

.user-main {
    flex: 1;
    margin-left: 240px;
    padding: 32px;
    background: var(--bg-primary);
    min-height: 100vh;
}

.user-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.user-header h2 {
    font-size: 24px;
    font-weight: 700;
}

/* ========== 用量条 ========== */
.usage-bar {
    height: 6px;
    background: rgba(255,255,255,0.08);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 12px;
}

.usage-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.5s ease;
    background: var(--accent-gradient);
}

.usage-bar-fill.warning { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.usage-bar-fill.danger { background: linear-gradient(90deg, #ef4444, #f87171); }

/* ========== Key卡片 ========== */
.key-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s;
}

.key-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(99,102,241,0.2);
}

.key-info { flex: 1; }
.key-name { font-weight: 600; margin-bottom: 4px; }
.key-value {
    font-family: monospace;
    font-size: 13px;
    color: #a5b4fc;
    background: rgba(99,102,241,0.1);
    padding: 4px 10px;
    border-radius: 4px;
    display: inline-block;
}
.key-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
}
.key-actions { display: flex; gap: 8px; }

/* ========== 网格 ========== */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 48px;
    color: var(--text-muted);
    font-size: 14px;
}

/* ========== 隐藏 ========== */
.hidden { display: none !important; }

/* ========== 响应式 ========== */
@media (max-width: 900px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); }
    .user-sidebar { display: none; }
    .user-main { margin-left: 0; }
    .hero-title { font-size: 32px; }
    .models-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
    .stats-bar { grid-template-columns: 1fr; }
    .navbar-nav { gap: 12px; }
    .navbar-brand { font-size: 16px; }
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.15);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.25);
}

/* ========== 后台管理 ========== */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 220px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 24px 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}
.admin-sidebar .sidebar-title {
    text-align: center;
    font-size: 18px;
    font-weight: 700;
    padding: 0 24px 24px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.admin-sidebar .sidebar-menu { list-style: none; padding: 0; }
.admin-sidebar .sidebar-menu li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}
.admin-sidebar .sidebar-menu li a:hover,
.admin-sidebar .sidebar-menu li a.active {
    background: rgba(99,102,241,0.08);
    color: var(--text-primary);
    border-left-color: var(--accent-primary);
}
.admin-main {
    flex: 1;
    margin-left: 220px;
    padding: 24px;
    background: var(--bg-primary);
    min-height: 100vh;
}
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.admin-header h2 { font-size: 20px; font-weight: 700; }

/* 后台统计 */
.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.admin-stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    transition: all 0.3s;
}
.admin-stat-card:hover {
    background: var(--bg-card-hover);
}
.admin-stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}
.admin-stat-card .stat-label {
    font-size: 13px;
    color: var(--text-muted);
}

/* 后台搜索 */
.search-box {
    display: flex;
    gap: 10px;
}
.search-box input {
    padding: 8px 14px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    width: 220px;
}
.search-box input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}
.search-box input::placeholder { color: var(--text-muted); }

/* 后台分页 */
.pagination {
    display: flex;
    gap: 6px;
    margin-top: 20px;
    justify-content: center;
    flex-wrap: wrap;
}
.pagination a, .pagination span {
    padding: 6px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    user-select: none;
    transition: all 0.3s;
}
.pagination a:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}
.pagination .current {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
}

/* 后台弹窗 */
.admin-modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}
.admin-modal-overlay.active { display: flex; }
.admin-modal-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 900px;
    max-width: 95vw;
    max-height: 90vh;
    overflow-y: auto;
    padding: 24px;
    box-shadow: var(--shadow-lg);
}
.admin-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.admin-modal-header h2 { margin: 0; font-size: 18px; }

/* 后台Toast */
.admin-toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    z-index: 3000;
    animation: toastIn 0.3s ease;
}
.admin-toast.success {
    background: rgba(34,197,94,0.15);
    color: var(--success);
    border: 1px solid rgba(34,197,94,0.3);
}
.admin-toast.error {
    background: rgba(239,68,68,0.15);
    color: var(--danger);
    border: 1px solid rgba(239,68,68,0.3);
}
.admin-toast.info {
    background: rgba(99,102,241,0.15);
    color: var(--accent-primary);
    border: 1px solid rgba(99,102,241,0.3);
}

/* 后台表格操作 */
.table-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* 后台loading */
.loading-text { color: var(--text-muted); text-align: center; padding: 20px; font-size: 14px; }

/* 后台特殊区块 */
.plan-select-box {
    background: rgba(245,158,11,0.05);
    border: 1px solid rgba(245,158,11,0.2);
    border-radius: var(--radius-md);
    padding: 16px;
    margin: 16px 0;
}
.plan-select-box h4 { color: var(--warning); margin-bottom: 10px; font-size: 14px; }

.hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
    line-height: 1.5;
}
.hint code {
    background: rgba(255,255,255,0.08);
    padding: 1px 5px;
    border-radius: 3px;
    color: var(--warning);
    font-size: 12px;
}

.test-box {
    background: rgba(34,197,94,0.05);
    border: 1px solid rgba(34,197,94,0.2);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-top: 20px;
}
.test-box h4 { margin-bottom: 15px; color: var(--success); font-size: 14px; }

.fetch-result {
    max-height: 300px;
    overflow-y: auto;
    margin: 12px 0;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px;
    background: var(--bg-primary);
}
.fetch-result label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-secondary);
}
.fetch-result label:last-child { border-bottom: none; }
.fetch-result input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent-primary); }
.fetch-result code { color: #a5b4fc; font-size: 13px; }

/* 后台响应式 */
@media (max-width: 900px) {
    .admin-sidebar { display: none; }
    .admin-main { margin-left: 0; padding: 16px; }
    .admin-modal-container { width: 100%; padding: 16px; }
    .search-box { width: 100%; }
    .search-box input { flex: 1; width: auto; }
    .admin-header { flex-wrap: wrap; gap: 12px; }
}