/* ===== Toolku.com 全局样式 ===== */
:root {
    --primary: #2D5F8A;
    --primary-dark: #1C3A5E;
    --primary-light: #4E79A7;
    --accent: #F28E2B;
    --accent-dark: #E07B1A;
    --bg: #F5F7FA;
    --bg-white: #FFFFFF;
    --text: #2E3440;
    --text-light: #6B7280;
    --text-muted: #9CA3AF;
    --border: #E5E7EB;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: all 0.2s ease;
}

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

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

/* ===== 导航栏 ===== */
.navbar {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--primary-dark);
    font-weight: 800;
    font-size: 22px;
}

.navbar-brand .logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    font-weight: bold;
}

.navbar-links {
    display: flex;
    gap: 8px;
    align-items: center;
}

.navbar-links a {
    text-decoration: none;
    color: var(--text-light);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.navbar-links a:hover, .navbar-links a.active {
    color: var(--primary);
    background: rgba(45, 95, 138, 0.08);
}

.navbar-links a.active {
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text);
    cursor: pointer;
}

/* ===== 主容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px;
}

/* ===== Hero 区域 ===== */
.hero {
    text-align: center;
    padding: 60px 24px 40px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    color: white;
    border-radius: var(--radius-lg);
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.03);
    border-radius: 50%;
}

.hero h1 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.hero p {
    font-size: 18px;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* ===== 工具分类标题 ===== */
.section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

.section-title .icon {
    margin-right: 8px;
}

/* ===== 工具卡片网格 ===== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.tool-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: var(--text);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.tool-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 16px;
}

.tool-card-icon.blue { background: rgba(45, 95, 138, 0.1); color: var(--primary); }
.tool-card-icon.orange { background: rgba(242, 142, 43, 0.1); color: var(--accent); }
.tool-card-icon.green { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.tool-card-icon.red { background: rgba(239, 68, 68, 0.1); color: var(--danger); }
.tool-card-icon.purple { background: rgba(139, 92, 246, 0.1); color: #8B5CF6; }

.tool-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.tool-card p {
    font-size: 14px;
    color: var(--text-light);
    flex-grow: 1;
}

.tool-card .arrow {
    margin-top: 12px;
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
}

/* ===== 工具页面通用样式 ===== */
.tool-page {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.tool-page h2 {
    font-size: 24px;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.tool-page .subtitle {
    color: var(--text-light);
    margin-bottom: 24px;
    font-size: 15px;
}

/* ===== 表单元素 ===== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
    font-size: 14px;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    transition: var(--transition);
    font-family: inherit;
    color: var(--text);
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(45, 95, 138, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

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

.btn-accent:hover {
    background: var(--accent-dark);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 16px;
}

/* ===== 结果展示 ===== */
.result-box {
    background: linear-gradient(135deg, #F0F4F8, #E8F0FE);
    border: 1px solid var(--primary-light);
    border-radius: var(--radius);
    padding: 24px;
    margin-top: 24px;
    text-align: center;
}

.result-box .result-value {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    margin: 8px 0;
}

.result-box .result-label {
    color: var(--text-light);
    font-size: 14px;
}

.result-box.success {
    background: linear-gradient(135deg, #ECFDF5, #D1FAE5);
    border-color: var(--success);
}

.result-box.success .result-value {
    color: var(--success);
}

.result-box.warning {
    background: linear-gradient(135deg, #FFFBEB, #FEF3C7);
    border-color: var(--warning);
}

.result-box.warning .result-value {
    color: var(--warning);
}

.result-box.danger {
    background: linear-gradient(135deg, #FEF2F2, #FEE2E2);
    border-color: var(--danger);
}

.result-box.danger .result-value {
    color: var(--danger);
}

/* ===== 检查清单 ===== */
.checklist {
    list-style: none;
}

.checklist li {
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
}

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

.checklist input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
    cursor: pointer;
}

.checklist li.checked {
    opacity: 0.5;
    text-decoration: line-through;
}

.checklist .category {
    font-weight: 700;
    color: var(--primary);
    font-size: 15px;
    padding: 10px 16px;
    background: rgba(45, 95, 138, 0.05);
    border-radius: var(--radius-sm);
    margin-top: 16px;
    margin-bottom: 8px;
}

/* ===== 对比表格 ===== */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
    font-size: 14px;
}

.comparison-table th {
    background: var(--primary);
    color: white;
    padding: 12px 16px;
    text-align: center;
    font-weight: 600;
}

.comparison-table th:first-child {
    text-align: left;
    border-radius: var(--radius-sm) 0 0 0;
}

.comparison-table th:last-child {
    text-align: left;
    border-radius: 0 var(--radius-sm) 0 0;
}

.comparison-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.comparison-table tr:nth-child(even) {
    background: var(--bg);
}

.comparison-table td:first-child {
    font-weight: 600;
    color: var(--text);
}

/* ===== 进度条 ===== */
.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--border);
    border-radius: 6px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-bar .fill {
    height: 100%;
    border-radius: 6px;
    transition: width 0.5s ease;
}

.progress-bar .fill.green { background: var(--success); }
.progress-bar .fill.orange { background: var(--warning); }
.progress-bar .fill.red { background: var(--danger); }

/* ===== 统计卡片 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.stat-card {
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
}

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

/* ===== 页脚 ===== */
.footer {
    text-align: center;
    padding: 32px 24px;
    color: var(--text-muted);
    font-size: 14px;
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

.footer a {
    color: var(--primary);
    text-decoration: none;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .navbar-links { display: none; }
    .mobile-menu-btn { display: block; }
    .hero h1 { font-size: 28px; }
    .hero p { font-size: 16px; }
    .form-row { grid-template-columns: 1fr; }
    .tools-grid { grid-template-columns: 1fr; }
    .container { padding: 20px 16px; }
    .tool-page { padding: 24px 20px; }
    .comparison-table { font-size: 13px; }
    .comparison-table th, .comparison-table td { padding: 8px 12px; }
}

/* ===== 页码导航 ===== */
.page-nav {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}

.page-nav a {
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text-light);
    font-size: 14px;
    transition: var(--transition);
}

.page-nav a:hover, .page-nav a.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* ===== 提示信息 ===== */
.tip-box {
    background: #FFF7ED;
    border: 1px solid #FED7AA;
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    margin-top: 16px;
    font-size: 14px;
    color: #9A3412;
}

.tip-box strong {
    display: block;
    margin-bottom: 4px;
}

.info-box {
    background: #EFF6FF;
    border: 1px solid #BFDBFE;
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    margin-top: 16px;
    font-size: 14px;
    color: #1E40AF;
}

/* ===== 快速入口按钮 ===== */
.quick-links {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin: 24px 0;
}

.quick-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 50px;
    text-decoration: none;
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.quick-link:hover {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: var(--shadow);
}