/* ========== 全局样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #d4af37;       /* 金色 - 主色调 */
    --primary-dark: #b8941f;
    --bg-dark: #0a0a0a;
    --bg-card: #1a1a1a;
    --bg-elevated: #242424;
    --text-primary: #ffffff;
    --text-secondary: #999;
    --border: #333;
    --success: #00c853;
    --danger: #ff3d57;
    --warning: #ffa726;
    --info: #29b6f6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* ========== 导航栏 ========== */
.navbar {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

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

.nav-links a {
    color: var(--text-primary);
    font-size: 14px;
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--primary); }
.nav-links a.active { color: var(--primary); }

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.balance-badge {
    background: var(--bg-elevated);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--primary);
    color: var(--primary);
    font-weight: 600;
}

/* ========== 按钮 ========== */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-primary {
    background: var(--primary);
    color: #000;
}
.btn-primary:hover { background: var(--primary-dark); }

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-card); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); color: #fff; }

.btn-block { width: 100%; justify-content: center; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

/* ========== 容器 ========== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.page-title {
    font-size: 28px;
    font-weight: 700;
}

/* ========== 卡片 ========== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ========== 登录注册 ========== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at 20% 30%, rgba(212, 175, 55, 0.08), transparent 40%),
                radial-gradient(circle at 80% 70%, rgba(212, 175, 55, 0.05), transparent 40%),
                var(--bg-dark);
    padding: 20px;
}

.auth-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.auth-logo {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin-bottom: 16px;
}

.auth-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

.auth-tabs {
    display: flex;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.auth-tab {
    flex: 1;
    padding: 12px;
    text-align: center;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

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

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

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

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: border 0.2s;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ========== 产品网格 ========== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
}

.product-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: 0 8px 30px rgba(212, 175, 55, 0.15);
}

.product-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 16px;
}

.product-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.product-desc {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 16px;
    min-height: 40px;
}

.product-price {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 16px;
}

.price-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.price-currency {
    font-size: 14px;
    color: var(--text-secondary);
}

.product-stock {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.product-stock.in-stock { color: var(--success); }
.product-stock.low-stock { color: var(--warning); }
.product-stock.out-stock { color: var(--danger); }

/* ========== 二维码区域 ========== */
.qr-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 16px;
}

.qr-box {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.qr-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--primary);
}

.qr-image {
    width: 200px;
    height: 200px;
    background: #fff;
    border-radius: 8px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.qr-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.qr-image .placeholder {
    color: #999;
    font-size: 14px;
    padding: 20px;
    text-align: center;
}

.qr-upload {
    margin-top: 12px;
}

.upload-label {
    display: block;
    cursor: pointer;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px dashed var(--border);
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.upload-label:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.upload-label input { display: none; }

/* ========== 表格 ========== */
.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th, table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

table th {
    background: var(--bg-elevated);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

table tr:hover { background: var(--bg-elevated); }

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-pending { background: rgba(255, 167, 38, 0.2); color: var(--warning); }
.badge-success { background: rgba(0, 200, 83, 0.2); color: var(--success); }
.badge-danger { background: rgba(255, 61, 87, 0.2); color: var(--danger); }
.badge-info { background: rgba(41, 182, 246, 0.2); color: var(--info); }

/* ========== 统计卡片 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.1), transparent 70%);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}

.stat-change {
    font-size: 12px;
    margin-top: 4px;
}

.stat-change.up { color: var(--success); }
.stat-change.down { color: var(--danger); }

/* ========== 模态框 ========== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
}

/* ========== 提示消息 ========== */
.toast {
    position: fixed;
    top: 24px;
    right: 24px;
    padding: 14px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    z-index: 2000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    display: none;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast.show { display: block; }
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .navbar { padding: 12px 16px; flex-wrap: wrap; gap: 12px; }
    .nav-links { gap: 12px; font-size: 13px; }
    .container { padding: 16px; }
    .qr-section { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: 1fr; }
    .auth-box { padding: 24px; }
}

/* ========== 警告框 ========== */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-info {
    background: rgba(41, 182, 246, 0.1);
    border: 1px solid rgba(41, 182, 246, 0.3);
    color: var(--info);
}

.alert-warning {
    background: rgba(255, 167, 38, 0.1);
    border: 1px solid rgba(255, 167, 38, 0.3);
    color: var(--warning);
}

/* ========== Tab 切换 ========== */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
}

.tab {
    padding: 10px 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

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

.tab-content { display: none; }
.tab-content.active { display: block; }
/* ========== 市场统计栏 ========== */
.market-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.market-stat {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    text-align: center;
}

.market-stat-label {
    color: var(--text-secondary);
    font-size: 12px;
    margin-bottom: 6px;
}

.market-stat-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

/* ========== 筛选栏 ========== */
.filter-bar {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    align-items: center;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
    max-width: 320px;
}

.filter-tabs {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-tab.active {
    background: var(--primary);
    color: #000;
    border-color: var(--primary);
    font-weight: 600;
}

/* ========== 币种表格 ========== */
.coin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.coin-table thead {
    position: sticky;
    top: 0;
    background: var(--bg-card);
    z-index: 10;
}

.coin-table th {
    padding: 14px 16px;
    background: var(--bg-elevated);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

.coin-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.coin-table tbody tr {
    transition: background 0.2s;
}

.coin-table tbody tr:hover {
    background: var(--bg-elevated);
}

.mini-chart {
    display: inline-block;
    vertical-align: middle;
}

.mini-chart svg {
    display: block;
}

/* 滚动条美化 */
.table-wrap::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.table-wrap::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

.table-wrap::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.table-wrap::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}