/* 短链接导航 - 网站样式 */

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

:root {
    --primary-color: #1890ff;
    --secondary-color: #52c41a;
    --warning-color: #faad14;
    --danger-color: #f5222d;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
}

/* 导航栏 */
header {
    background: var(--bg-white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
}

/* 主要内容区 */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.hero {
    text-align: center;
    padding: 3rem 1rem;
    background: linear-gradient(135deg, #1890ff 0%, #096dd9 100%);
    color: white;
    border-radius: 1rem;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.95;
}

section {
    margin-bottom: 3rem;
}

.section-title {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
}

/* 工具卡片网格 */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.tool-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    transition: all 0.3s;
    position: relative;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(24, 144, 255, 0.15);
    border-color: var(--primary-color);
}

.tool-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.tool-badge.popular {
    background: #ef4444;
}

.tool-badge.hot {
    background: #f59e0b;
}

.tool-badge.safe {
    background: #52c41a;
}

.tool-badge.enterprise {
    background: #722ed1;
}

.tool-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.tool-card p {
    color: var(--text-gray);
    margin-bottom: 1rem;
    line-height: 1.6;
}

/* 功能特性网格 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.feature-card {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border-left: 3px solid var(--primary-color);
}

.feature-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-gray);
    font-size: 0.9375rem;
}

/* 按钮 */
.btn-primary, .btn-secondary, .btn-outline, .btn-danger {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: #096dd9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
}

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

.btn-secondary:hover {
    background: #389e0d;
    transform: translateY(-2px);
}

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

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

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

.btn-danger:hover {
    background: #cf1322;
}

/* 信息框 */
.info-box, .success-box, .warning-box, .danger-box {
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin: 1.5rem 0;
    border-left: 4px solid;
}

.info-box {
    background: #e6f7ff;
    border-color: var(--primary-color);
}

.success-box {
    background: #f6ffed;
    border-color: var(--secondary-color);
}

.warning-box {
    background: #fffbe6;
    border-color: var(--warning-color);
}

.danger-box {
    background: #fff1f0;
    border-color: var(--danger-color);
}

.info-box h3, .success-box h3, .warning-box h3, .danger-box h3 {
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

/* 表格 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: var(--bg-white);
}

thead {
    background: var(--bg-light);
}

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

th {
    font-weight: 600;
    color: var(--text-dark);
}

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

/* CTA区域 */
.cta-section {
    text-align: center;
    padding: 3rem 1.5rem;
    background: linear-gradient(135deg, #1890ff 0%, #096dd9 100%);
    color: white;
    border-radius: 1rem;
    margin: 3rem 0;
}

.cta-section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    opacity: 0.95;
}

.cta-section .btn-primary,
.cta-section .btn-secondary,
.cta-section .btn-outline {
    margin: 0.5rem;
}

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

.cta-section .btn-primary:hover {
    background: var(--bg-light);
}

.cta-section .btn-outline {
    border-color: white;
    color: white;
}

.cta-section .btn-outline:hover {
    background: white;
    color: var(--primary-color);
}

/* 页脚 */
footer {
    background: var(--text-dark);
    color: white;
    text-align: center;
    padding: 2rem 1.5rem;
    margin-top: 3rem;
}

footer a {
    color: white;
    text-decoration: none;
    margin: 0 0.5rem;
}

footer a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        gap: 0;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .tool-grid,
    .feature-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    nav {
        padding: 1rem;
    }

    main {
        padding: 1rem;
    }

    .hero {
        padding: 2rem 1rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }
}