* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary-blue: #4da6ff;
    --light-blue: #e6f2ff;
    --white: #ffffff;
    --accent-orange: #ff9900;
    --text-dark: #333333;
    --text-light: #666666;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    background-color: var(--light-blue);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
header {
    background: var(--white);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
    border-bottom: 3px solid var(--primary-blue);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    height: 60px;
    width: auto;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(77, 166, 255, 0.5);
    transition: transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.05);
}

.logo-text {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-blue);
    text-shadow: 0 0 10px rgba(77, 166, 255, 0.2);
    letter-spacing: 1px;
}

.logo-text span {
    color: var(--accent-orange);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

nav a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    padding: 8px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
    position: relative;
}

nav a:hover {
    color: var(--primary-blue);
    background: rgba(77, 166, 255, 0.1);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-orange);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

nav a:hover::after {
    width: 80%;
}

.mobile-menu {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--primary-blue);
}

/* 页面标题 */
.page-header {
    margin-top: 100px;
    padding: 40px 0;
    text-align: center;
}

.page-title {
    font-size: 42px;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.page-subtitle {
    font-size: 18px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* 更新日志部分 */
.updates-section {
    padding: 50px 0 80px;
}

.updates-container {
    max-width: 900px;
    margin: 0 auto;
}

.update-item {
    background: var(--white);
    padding: 30px;
    margin-bottom: 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    border-left: 5px solid var(--accent-orange);
    transition: transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.update-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--accent-orange);
}

.update-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 25px rgba(0, 0, 0, 0.1);
}

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

.update-title {
    color: var(--primary-blue);
    font-size: 24px;
    margin: 0;
}

.update-date {
    color: var(--accent-orange);
    font-weight: 600;
    font-size: 16px;
}

.update-content {
    color: var(--text-light);
    line-height: 1.6;
}

.update-content ul {
    margin-left: 20px;
    margin-top: 15px;
}

.update-content li {
    margin-bottom: 10px;
    position: relative;
}

.update-content li:before {
    content: "•";
    color: var(--accent-orange);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

.version-badge {
    display: inline-block;
    background: var(--accent-orange);
    color: white;
    padding: 3px 10px;
    border-radius: 15px;
    font-size: 14px;
    margin-left: 10px;
    vertical-align: middle;
}

/* 页脚 */
footer {
    background: var(--primary-blue);
    color: white;
    padding: 50px 0 20px;
    margin-top: 50px;
}

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

.footer-column h3 {
    color: white;
    margin-bottom: 20px;
    font-size: 22px;
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: white;
    color: var(--primary-blue);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, #cce6ff, #e6f2ff);
    color: #4da6ff;
    padding: 10px 25px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    transition: all 0.3s ease;
    border: 2px solid #cce6ff;
    box-shadow: var(--shadow);
    margin-top: 20px;
}

.btn:hover {
    background: transparent;
    color: #4da6ff;
    border-color: #4da6ff;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.page-link {
    padding: 8px 15px;
    text-decoration: none;
    border: 1px solid #ddd;
    color: #333;
    border-radius: 4px;
    transition: all 0.3s;
}

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

.page-link.active {
    font-weight: bold;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    nav ul {
        gap: 15px;
    }

    .mobile-menu {
        display: block;
    }

    .nav-menu {
        display: none;
        width: 100%;
        text-align: center;
        margin-top: 15px;
    }

    .nav-menu.active {
        display: block;
    }

    nav ul {
        flex-direction: column;
        gap: 10px;
    }

    .update-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .update-title {
        font-size: 20px;
    }
}