/* ===== 电脑配件报价 - 全局样式 ===== */

/* --- CSS变量（深色主题） --- */
:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --bg-secondary: #f1f5f9;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --hover: #f8fafc;
    --danger: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 6px rgba(0,0,0,0.07), 0 10px 15px rgba(0,0,0,0.1);
}

.dark {
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-secondary: #1e293b;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    --border-light: #1e293b;
    --hover: #334155;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-lg: 0 4px 6px rgba(0,0,0,0.4), 0 10px 15px rgba(0,0,0,0.3);
}

/* --- Reset --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    transition: background .3s, color .3s;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; }

/* --- 布局 --- */
.page-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 16px;
}
@media (min-width: 768px) {
    .page-container { padding: 0 24px; }
}

/* --- 导航栏 --- */
.navbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(255,255,255,0.85);
}
.dark .navbar {
    background: rgba(15,23,42,0.85);
}
.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 16px;
}
@media (min-width: 768px) {
    .navbar-inner { padding: 0 24px; }
}
.navbar-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}
.navbar-logo:hover { color: var(--primary); }
.navbar-links {
    display: flex;
    align-items: center;
    gap: 4px;
}
.navbar-links a {
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: all .2s;
}
.navbar-links a:hover,
.navbar-links a.active {
    background: var(--bg-secondary);
    color: var(--text);
}
.navbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}
.navbar-actions .btn {
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all .2s;
}
.navbar-actions .btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}
.navbar-actions .btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.navbar-actions .btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
}
.theme-toggle {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 16px;
    transition: all .2s;
}
.theme-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* --- 页脚 --- */
.footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    margin-top: 48px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}
.footer a { color: var(--text-secondary); }
.footer a:hover { color: var(--primary); }

/* --- 卡片 --- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    transition: all .2s;
}
.card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}
.card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}

/* --- 按钮 --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    cursor: pointer;
    transition: all .2s;
    text-decoration: none;
    white-space: nowrap;
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-sm { padding: 4px 12px; font-size: 13px; }
.btn-lg { padding: 10px 24px; font-size: 15px; }
.btn-danger { color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }

/* --- 表单 --- */
.form-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: border-color .2s;
}
.form-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.15); }
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 4px;
}
.form-group { margin-bottom: 16px; }
select.form-input { cursor: pointer; }
textarea.form-input { resize: vertical; min-height: 80px; }

/* --- 表格 --- */
.table-wrap {
    overflow-x: auto;
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}
th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
    background: var(--bg-secondary);
}
tr:hover td { background: var(--hover); }

/* --- 标签/徽章 --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
}
.badge-primary { background: rgba(99,102,241,0.1); color: var(--primary); }
.badge-success { background: rgba(34,197,94,0.1); color: var(--success); }
.badge-danger { background: rgba(239,68,68,0.1); color: var(--danger); }
.badge-warning { background: rgba(245,158,11,0.1); color: var(--warning); }

/* --- 网格 --- */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 1024px) {
    .grid-4, .grid-5 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    .grid-3, .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
}
.flex { display: flex; }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }

/* --- 通用工具 --- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 12px; }
.text-lg { font-size: 16px; }
.text-xl { font-size: 20px; }
.text-2xl { font-size: 24px; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-primary { color: var(--primary); }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.p-4 { padding: 16px; }
.p-6 { padding: 24px; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.block { display: block; }
.hidden { display: none; }

/* --- Loading --- */
.spinner {
    width: 24px; height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin .6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    gap: 8px;
    color: var(--text-muted);
    font-size: 14px;
}

/* --- 空状态 --- */
.empty-state {
    text-align: center;
    padding: 48px 16px;
    color: var(--text-muted);
}
.empty-state-icon { font-size: 40px; margin-bottom: 8px; }
.empty-state-text { font-size: 14px; }

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    width: 100%;
    max-width: 600px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 16px; font-weight: 600; }
.modal-close {
    width: 28px; height: 28px;
    border-radius: 50%;
    border: none;
    background: var(--bg-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 16px;
}
.modal-close:hover { background: var(--hover); color: var(--text); }
.modal-body { padding: 16px 20px; }

/* --- 响应式导航 --- */
.mobile-menu-btn {
    display: none;
    width: 34px; height: 34px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    color: var(--text);
}
@media (max-width: 768px) {
    .navbar-links { display: none; }
    .mobile-menu-btn { display: flex; }
    .navbar-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0; right: 0;
        background: var(--bg-card);
        border-bottom: 1px solid var(--border);
        padding: 8px 16px;
        gap: 2px;
    }
}

/* --- Toast --- */
.toast {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 9999;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    transform: translateX(120%);
    transition: transform .3s;
    max-width: 360px;
}
.toast.show { transform: translateX(0); }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--primary); }