/* CSS变量定义 */
:root {
    --primary: #0078D7;
    --primary-light: #E3F2FD;
    --secondary: #6B5BED;
    --accent: #FF7D4D;
    --dark: #201F1E;
    --light: #FFFFFF;
    --gray: #F3F2F1;
    --gray-dark: #8A8886;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --radius: 8px;
    --transition: all 0.3s ease;
}

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background: linear-gradient(135deg, #F7F9FC 0%, #EDF2F7 100%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
header {
    background-color: var(--light);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.5rem;
    color: var(--primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

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

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

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

/* 英雄区域样式 */
.hero {
    padding: 80px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin-bottom: 32px;
    color: var(--gray-dark);
}

.badge {
    display: inline-flex;
    align-items: center;
    background-color: var(--primary-light);
    color: var(--primary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    margin-top: 24px;
}

.btn {
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: #106EBE;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
}

/* 特性部分样式 */
.features {
    padding: 80px 0;
    background-color: var(--light);
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 16px;
    color: var(--dark);
}

.section-header p {
    color: var(--gray-dark);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-card {
    background-color: var(--light);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    color: var(--primary);
    font-size: 1.5rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

/* 对比部分样式 */
.comparison {
    padding: 80px 0;
}

.comparison-table {
    background-color: var(--light);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

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

th, td {
    padding: 16px 24px;
    text-align: left;
}

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

th {
    font-weight: 600;
}

tbody tr:nth-child(even) {
    background-color: var(--gray);
}

.good {
    color: #107C10;
    font-weight: 600;
}

.bad {
    color: #D13438;
    font-weight: 600;
}

/* 下载部分样式 */
.download {
    padding: 80px 0;
    background-color: var(--light);
}

.download-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.download-content p {
    margin-bottom: 32px;
}

.repo-links {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 页脚样式 */
footer {
    background-color: var(--dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

footer p {
    opacity: 0.8;
    margin-bottom: 16px;
}

.footer-links h4 {
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: white;
    opacity: 0.8;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
}

.copyright {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons, .repo-links {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
    
    table {
        display: block;
        overflow-x: auto;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 60px 0;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .feature-card {
        padding: 16px;
    }
    
    .feature-card h3 {
        font-size: 1.2rem;
    }
}

/* 404页面样式 */
.error-page {
    padding: 100px 0;
    min-height: 70vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.error-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.error-code {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 30px;
    font-size: 8rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.error-icon {
    width: 120px;
    height: 120px;
    margin: 0 20px;
    color: var(--primary);
    animation: pulse 2s infinite;
}

.error-content h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--dark);
}

.error-content p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: var(--gray-dark);
}

.error-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.error-tips {
    background-color: var(--light);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
    text-align: left;
    max-width: 500px;
    margin: 0 auto;
}

.error-tips h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--dark);
    border-bottom: 1px solid var(--gray);
    padding-bottom: 10px;
}

.error-tips ul {
    list-style-type: none;
}

.error-tips li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
}

.error-tips li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-size: 1.5rem;
}

/* 动画效果 */
@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .error-code {
        font-size: 6rem;
    }
    
    .error-icon {
        width: 80px;
        height: 80px;
        margin: 0 10px;
    }
    
    .error-content h1 {
        font-size: 2rem;
    }
    
    .error-content p {
        font-size: 1rem;
    }
    
    .error-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .error-actions .btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .error-code {
        font-size: 4rem;
    }
    
    .error-icon {
        width: 60px;
        height: 60px;
    }
    
    .error-content h1 {
        font-size: 1.6rem;
    }
}