/* 基础样式 */
:root {
    --primary-color: #23b79c;
    --text-color: #333;
    --background-color: #f8f9fa;
    --container-background: white;
    --header-height: 70px;
    --footer-height: 60px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--background-color);
}

/* 导航栏样式 */
.navbar {
    background: #000000;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-left {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: white;
    transition: opacity 0.3s;
}

.logo:hover {
    opacity: 0.9;
}

.logo-icon {
    font-size: 28px;
    margin-right: 8px;
}

.logo-text {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* 语言选择器样式 */
.language-selector {
    position: relative;
    cursor: pointer;
    color: white;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px;
    border-radius: 6px;
    transition: background-color 0.3s;
}

.language-selector:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.language-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 8px 0;
    min-width: 120px;
    margin-top: 4px;
}

.language-menu.show {
    display: block;
}

.language-option {
    padding: 8px 16px;
    color: var(--text-color);
    transition: background-color 0.3s;
}

.language-option:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* 登录按钮样式 */
.login-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15.5px;
    font-weight: 500;
    transition: background-color 0.3s;
}

.login-btn:hover {
    background-color: #1fa589;
}

/* 主要内容区域样式 */
.main-content {
    flex: 1;
    padding: calc(var(--header-height) + 40px) 20px 100px;
}

.content-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--container-background);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

h1 {
    font-size: 32px;
    font-weight: 700;
    margin: 0 0 20px;
    color: #1a1a1a;
}

.update-date {
    color: #666;
    margin-bottom: 30px;
    font-size: 15.5px;
}

h2 {
    font-size: 24px;
    font-weight: 600;
    margin: 40px 0 20px;
    color: #1a1a1a;
}

h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 30px 0 15px;
    color: #1a1a1a;
}

p {
    margin: 15px 0;
    font-size: 15.5px;
    color: #333;
}

ul, ol {
    margin: 15px 0;
    padding-left: 24px;
}

li {
    margin: 8px 0;
    font-size: 15.5px;
    color: #333;
}

.highlight {
    background: rgba(35, 183, 156, 0.1);
    border-left: 4px solid var(--primary-color);
    padding: 20px;
    margin: 30px 0;
    border-radius: 0 8px 8px 0;
}

.highlight p {
    margin: 0;
}

.highlight strong {
    color: #1a1a1a;
}

/* 底部样式 */
.footer {
    background: #000000;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--footer-height);
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.95);
}

.footer-left {
    opacity: 0.85;
    font-weight: 500;
    letter-spacing: 0.3px;
    font-size: 15.5px;
    transition: opacity 0.3s;
}

.footer-left:hover {
    opacity: 1;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.95);
    text-decoration: none;
    opacity: 0.85;
    transition: all 0.3s ease;
    font-weight: 500;
    letter-spacing: 0.3px;
    font-size: 15.5px;
    position: relative;
}

.footer-links a:hover {
    opacity: 1;
    transform: translateY(-1px);
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background: white;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.footer-links a:hover::after {
    transform: scaleX(1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container,
    .footer-container {
        padding: 0 15px;
    }

    .content-container {
        padding: 30px 20px;
    }

    h1 {
        font-size: 28px;
    }

    h2 {
        font-size: 22px;
    }

    h3 {
        font-size: 18px;
    }

    .logo-icon {
        font-size: 24px;
    }

    .logo-text {
        font-size: 20px;
    }

    .footer-left,
    .footer-links a {
        font-size: 14px;
    }

    .footer-links {
        gap: 20px;
    }
}