/* index.html 主框架页面样式 */

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, #c31432 0%, #d2232a 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background 0.3s ease;
    width: 100%;
    margin: 0;
    padding: 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 60px;
    width: 100%;
    box-sizing: border-box;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
    position: relative;
    -webkit-tap-highlight-color: transparent;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: #fff;
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* 移动端菜单 */
.mobile-menu {
    display: block;
    background: linear-gradient(135deg, #c31432 0%, #d2232a 100%);
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    width: 100%;
    padding: 0;
    margin: 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    z-index: 999;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease, visibility 0.3s ease;
    box-sizing: border-box;
}

.mobile-menu.active {
    max-height: 400px;
    padding: 20px;
    visibility: visible;
}

.mobile-menu a {
    display: block;
    color: #fff;
    padding: 12px 16px;
    margin: 5px 0;
    border-radius: 4px;
    font-size: 16px;
}

.mobile-menu a:hover,
.mobile-menu a.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* 内容容器 */
#content-container {
    min-height: calc(100vh - 200px);
    padding: 0;
    margin: 0;
}

/* 确保内容区域正确显示 */
#content-container > * {
    width: 100%;
}

/* 加载动画样式 */
.loading-spinner {
    text-align: center;
    padding: 100px 0;
}

.loading-spinner > div {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #c31432;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* 历届活动导航 */
.history-nav {
    background: linear-gradient(135deg, #c31432 0%, #d2232a 100%);
    padding: 30px;
    border-radius: 0;
    margin-bottom: 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.history-nav .nav-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.history-nav a {
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    padding: 10px 20px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.history-nav a:hover {
    background-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-3px);
}

/* 页脚 */
.footer {
    background-color: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 30px 20px;
    margin: 0;
}

.footer p {
    font-size: 14px;
    opacity: 0.9;
}

/* 响应式设计 - 平板 */
@media screen and (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .nav-links {
        display: none !important;
    }

    .menu-toggle {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .mobile-menu.active {
        visibility: visible;
    }

    .nav-container {
        justify-content: flex-end;
    }

    #content-container {
        min-height: calc(100vh - 150px);
    }
    
    .loading-spinner {
        padding: 50px 0;
    }

    .history-nav {
        padding: 20px 15px;
    }

    .history-nav .nav-container {
        gap: 10px;
    }

    .history-nav a {
        font-size: 14px;
        padding: 8px 15px;
    }
}

/* 响应式设计 - 手机 */
@media screen and (max-width: 480px) {
    html {
        font-size: 13px;
    }

    .nav-container {
        padding: 0 15px;
        min-height: 50px;
    }

    .mobile-menu {
        top: 50px;
        padding: 15px;
    }

    #content-container {
        min-height: calc(100vh - 120px);
    }
    
    .loading-spinner {
        padding: 30px 0;
    }
    
    .loading-spinner > div {
        width: 40px;
        height: 40px;
        border-width: 4px;
    }

    .history-nav {
        padding: 15px;
        border-radius: 8px;
    }

    .history-nav .nav-container {
        flex-direction: column;
        gap: 8px;
    }

    .history-nav a {
        width: 100%;
        text-align: center;
        font-size: 14px;
        padding: 10px;
    }

    .footer {
        padding: 20px 15px;
    }

    .footer p {
        font-size: 12px;
    }
}