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

:root {
    --primary-blue: #0066cc;
    --secondary-blue: #0099ff;
    --light-blue: #e6f2ff;
    --dark-blue: #004080;
    --accent-orange: #ff6600;
    --accent-green: #28a745;
    --text-dark: #333;
    --text-light: #fff;
    --gray-light: #f5f5f5;
    --gray: #ddd;
}

body {
    color: var(--text-dark);
    line-height: 1.6;
    background-color: #f9f9f9;
}

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

/* 头部样式 */
header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--text-light);
    padding: 15px 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

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

.logo img {
    height: 60px;
    width: auto;
    object-fit: contain;
    border-radius: 8px;
}

.logo h1 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    white-space: nowrap;
}

nav ul {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: flex-end;
    max-width: 100%;
}

nav ul li {
    margin: 0;
    position: relative;
    flex-shrink: 0;
}

nav ul li a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    font-size: 13px;
    transition: all 0.3s ease;
    padding: 6px 10px;
    border-radius: 6px;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 3px;
    position: relative;
    overflow: hidden;
}

nav ul li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

nav ul li a:hover::before {
    left: 100%;
}

/* 导航链接激活状态 */
nav ul li a.active {
    background-color: rgba(255, 255, 255, 0.25);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

nav ul li a:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 突出显示重要导航项 */
nav ul li:first-child a {
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.1);
}

nav ul li:last-child a {
    background: linear-gradient(135deg, rgba(255, 102, 0, 0.2) 0%, rgba(255, 102, 0, 0.3) 100%);
    border: 1px solid rgba(255, 102, 0, 0.3);
    font-weight: 600;
}

nav ul li:last-child a:hover {
    background: linear-gradient(135deg, rgba(255, 102, 0, 0.3) 0%, rgba(255, 102, 0, 0.4) 100%);
    border-color: rgba(255, 102, 0, 0.5);
    box-shadow: 0 4px 12px rgba(255, 102, 0, 0.2);
}

/* 焦点状态样式 */
nav ul li a:focus {
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

/* 添加工具提示 */
nav ul li {
    position: relative;
}

nav ul li[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -35px;
    left: 50%;
    transform: translateX(-50%) scale(0);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    pointer-events: none;
    transition: transform 0.3s ease;
    z-index: 1000;
}

nav ul li:hover[data-tooltip]::after {
    transform: translateX(-50%) scale(1);
}

/* 用户导航下拉菜单样式 */
#user-nav {
    position: relative;
}

#user-nav > a {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

#user-nav > a:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

#user-menu-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

#user-menu-btn i.fa-chevron-down {
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

#user-menu-btn.active i.fa-chevron-down {
    transform: rotate(180deg);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    min-width: 220px;
    padding: 8px;
    margin-top: 10px;
    list-style: none;
    z-index: 1000;
    animation: fadeInDown 0.3s ease;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    right: 20px;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid white;
}

.user-dropdown li {
    margin: 0;
    padding: 0;
}

.user-dropdown li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.3s ease;
    border-radius: 6px;
    margin: 2px 0;
}

.user-dropdown li a:hover {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    transform: translateX(4px);
}

.user-dropdown li a i {
    width: 16px;
    font-size: 14px;
}

#logout-btn:hover {
    background-color: #fee2e2 !important;
    color: #dc2626 !important;
}

/* 轮播图样式 */
.hero-slider {
    position: relative;
    width: 100%;
    height: 500px;
    overflow: hidden;
    background: var(--gray-light);
}

.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.slider-wrapper {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.5s ease-in-out;
}

.slider-item {
    min-width: 100%;
    height: 100%;
    position: relative;
    cursor: pointer;
    background: var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slider-item .placeholder {
    font-size: 4rem;
    color: #ccc;
}

.slider-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
    padding: 40px;
    text-align: left;
}

.slider-title {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    pointer-events: none;
}

.slider-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    pointer-events: all;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.slider-btn:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.1);
}

.slider-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: white;
    transform: scale(1.2);
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(rgba(0, 68, 136, 0.7), rgba(0, 68, 136, 0.7)), url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="1200" height="600" viewBox="0 0 1200 600"><rect fill="%230066cc" width="1200" height="600"/><path fill="%23004d99" d="M0,150 C200,300 400,100 600,250 C800,400 1000,150 1200,300 L1200,600 L0,600 Z"></path><circle fill="%23ffffff" opacity="0.1" cx="200" cy="100" r="50"/><circle fill="%23ffffff" opacity="0.1" cx="1000" cy="150" r="80"/><circle fill="%23ffffff" opacity="0.1" cx="800" cy="400" r="60"/></svg>') no-repeat center center/cover;
    height: 500px;
    display: flex;
    align-items: center;
    color: var(--text-light);
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.7);
    position: relative;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    background-color: var(--accent-orange);
    color: var(--text-light);
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    margin: 5px;
}

.btn:hover {
    background-color: #e55a00;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--text-light);
}

.btn-outline:hover {
    background: var(--text-light);
    color: var(--primary-blue);
}

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

.btn-blue:hover {
    background-color: var(--dark-blue);
}

.btn-green {
    background-color: var(--accent-green);
}

.btn-green:hover {
    background-color: #218838;
}

/* 主要内容区域 */
.main-content {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    color: var(--primary-blue);
    font-size: 2.2rem;
    position: relative;
    font-weight: 700;
    line-height: 1.3;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background-color: var(--accent-orange);
    margin: 15px auto;
    border-radius: 2px;
}

/* 主要section标题样式 */
.main-section-title {
    font-size: 2.5rem;
    margin-bottom: 40px;
    color: var(--dark-blue);
    text-align: center;
    font-weight: 700;
    line-height: 1.2;
}

/* 次要section标题样式 */
.sub-section-title {
    font-size: 1.8rem;
    margin-bottom: 30px;
    color: var(--primary-blue);
    text-align: center;
    font-weight: 600;
    line-height: 1.3;
}


/* 队伍介绍部分 */
.intro-section {
    padding: 80px 0;
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.intro-text h2 {
    color: var(--primary-blue);
    margin-bottom: 20px;
    font-size: 2.2rem;
}

.intro-image {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    background-color: var(--primary-blue);
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 5rem;
}

.intro-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-box {
    background-color: var(--light-blue);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

/* 最新报道部分 */
.news-section {
    background-color: var(--light-blue);
    padding: 80px 0;
    margin: 60px 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.news-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
}

.news-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    overflow: hidden;
}

.news-image-real {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.news-content {
    padding: 20px;
}

.news-date {
    color: var(--primary-blue);
    font-size: 0.9rem;
    font-weight: bold;
}

.news-content h3 {
    margin: 10px 0;
    color: var(--text-dark);
    font-size: 1.2rem;
    line-height: 1.4;
}

.news-summary {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-content .btn {
    margin-top: 10px;
}

/* 服务卡片样式 */
.services {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.service-card {
    background-color: var(--text-light);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-icon {
    background-color: var(--light-blue);
    text-align: center;
    padding: 30px;
    font-size: 2.5rem;
    color: var(--primary-blue);
}

.service-content {
    padding: 25px;
}

.service-content h3 {
    color: var(--primary-blue);
    margin-bottom: 15px;
    font-size: 1.4rem;
}

/* 商城部分 */
.shop-section {
    background-color: var(--light-blue);
    padding: 80px 0;
    margin: 60px 0;
}

.products {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
}

.product-image {
    height: 200px;
    background-color: var(--primary-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    position: relative;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.product-content {
    padding: 20px;
}

.product-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-blue);
}

.product-price {
    font-size: 1.3rem;
    color: var(--accent-orange);
    font-weight: bold;
    margin-bottom: 15px;
}

/* 积分兑换部分 */
.points-section {
    padding: 80px 0;
}

.points-system {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
}

.points-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.points-item {
    text-align: center;
    padding: 20px;
    background-color: var(--light-blue);
    border-radius: 10px;
}

.points-item i {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.points-item h3 {
    margin-bottom: 10px;
}

/* 志愿活动部分 */
.activities-section {
    padding: 80px 0;
    margin: 60px 0;
}

.section-subtitle {
    text-align: center;
    color: #666;
    font-size: 1.1rem;
    margin: -30px auto 40px;
    max-width: 600px;
}

/* 活动卡片样式 - 复用新闻卡片样式 */
.activity-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    cursor: pointer;
}

.activity-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.activity-image {
    height: 200px;
    background: linear-gradient(135deg, var(--accent-green) 0%, #20c997 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    position: relative;
    overflow: hidden;
}

.activity-image-real {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.activity-status-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255, 255, 255, 0.95);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dark);
}

.activity-status-badge.status-open {
    background: var(--accent-green);
    color: white;
}

.activity-status-badge.status-closed {
    background: #6c757d;
    color: white;
}

.activity-status-badge.status-completed {
    background: var(--primary-blue);
    color: white;
}

.activity-content {
    padding: 20px;
}

.activity-type {
    color: var(--accent-green);
    font-size: 0.9rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.activity-content h3 {
    margin: 0 0 10px 0;
    color: var(--text-dark);
    font-size: 1.2rem;
    line-height: 1.4;
}

.activity-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 15px 0;
    font-size: 0.9rem;
    color: #666;
}

.activity-meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.activity-meta-item i {
    color: var(--accent-green);
    width: 16px;
}

.activity-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.activity-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

.activity-participants {
    color: #666;
    font-size: 0.9rem;
}

.activity-participants i {
    color: var(--accent-green);
}

.activity-points {
    background: linear-gradient(135deg, var(--accent-orange) 0%, #ff8533 100%);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 公益活动报表部分 */
.reports-section {
    background-color: var(--light-blue);
    padding: 80px 0;
    margin: 60px 0;
}

.reports-container {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.reports-filter {
    padding: 20px;
    background-color: var(--gray-light);
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.filter-btn {
    padding: 8px 15px;
    background: white;
    border: 1px solid var(--gray);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

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

.reports-table th, .reports-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray);
}

.reports-table th {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    font-weight: 600;
}

.reports-table tr:hover {
    background-color: #f9f9f9;
}

.status {
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    display: inline-block;
}

.status-completed {
    background-color: #e6f7ee;
    color: #28a745;
}

.status-ongoing {
    background-color: #fff4e6;
    color: #fd7e14;
}

.status-upcoming {
    background-color: #e6f0ff;
    color: #007bff;
}

/* 加入救援队部分 */
.join-section {
    padding: 80px 0;
    margin: 60px 0;
}

.join-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.join-text h2 {
    color: var(--primary-blue);
    margin-bottom: 20px;
    font-size: 2.2rem;
}

.benefits {
    margin: 25px 0;
}

.benefit-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.benefit-item i {
    color: var(--accent-orange);
    margin-right: 15px;
    font-size: 1.2rem;
}

.join-image {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    background-color: var(--primary-blue);
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 5rem;
}

/* AI赞助区域样式 */
.ai-sponsor {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
    color: var(--text-light);
    padding: 80px 0;
    text-align: center;
    border-radius: 10px;
    margin: 60px 0;
}

.ai-sponsor h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.ai-sponsor p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 30px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.feature {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 8px;
    backdrop-filter: blur(5px);
}

.feature i {
    font-size: 2.5rem;
    color: var(--accent-orange);
    margin-bottom: 15px;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-blue);
    color: var(--text-light);
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h3 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--accent-orange);
}

.contact-info {
    list-style: none;
}

.contact-info li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.contact-info i {
    margin-right: 10px;
    color: var(--accent-orange);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 移动端汉堡菜单样式 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.mobile-menu-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    display: none;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
    display: block;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100%;
    background: white;
    z-index: 1000;
    transition: right 0.3s ease;
    overflow-y: auto;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-menu-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
}

.mobile-nav {
    padding: 20px 0;
}

.mobile-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.mobile-nav li {
    margin: 0;
}

.mobile-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px 20px;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    background-color: white;
}

.mobile-nav a:hover,
.mobile-nav a.active {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    border-left-color: var(--primary-blue);
}

.mobile-nav a i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.mobile-nav .divider {
    height: 1px;
    background-color: #eee;
    margin: 10px 20px;
}

/* 移动端更多菜单样式 */
.mobile-more-menu {
    position: relative;
}

.mobile-more-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 15px 20px;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    background-color: white;
    cursor: pointer;
}

.mobile-more-btn:hover,
.mobile-more-btn.active {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    border-left-color: var(--primary-blue);
}

.mobile-more-btn i.fa-chevron-down {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.mobile-more-btn.active i.fa-chevron-down {
    transform: rotate(180deg);
}

.mobile-more-dropdown {
    background-color: #f8f9fa;
    border-left: 3px solid var(--primary-blue);
    margin-left: 20px;
    border-radius: 0 8px 8px 0;
    overflow: hidden;
}

.mobile-more-dropdown li {
    margin: 0;
}

.mobile-more-dropdown a {
    padding: 12px 20px 12px 40px;
    font-size: 14px;
    background-color: #f8f9fa;
    border-left: none;
}

.mobile-more-dropdown a:hover {
    background-color: var(--light-blue);
    transform: none;
}

/* 导航高亮效果 */
.nav-highlight {
    position: relative;
}

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

.nav-highlight.active::after {
    width: 80%;
}

/* 响应式设计 */
@media (max-width: 968px) {
    .intro-content, .join-content {
        grid-template-columns: 1fr;
    }

    .intro-image, .join-image {
        order: -1;
    }

    .reports-table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 -20px;
        padding: 0 20px;
    }

    .reports-table {
        min-width: 800px;
    }

    .reports-table th,
    .reports-table td {
        padding: 12px 8px;
        font-size: 0.9rem;
        white-space: nowrap;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 10px;
    }

    .logo {
        justify-content: flex-start;
    }

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

    

/* 更小屏幕的导航栏优化 */
@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.3rem;
    }

    .mobile-menu {
        width: 250px;
    }

    .mobile-nav a {
        padding: 12px 15px;
        font-size: 15px;
    }
}

/* 新闻列表页面样式 */
.news-list-section {
    padding: 80px 0;
}

.news-list {
    margin-top: 40px;
}

.news-list-item {
    display: flex;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.news-list-item:hover {
    transform: translateY(-5px);
}

.news-list-image {
    width: 200px;
    min-height: 200px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.news-list-image i {
    font-size: 3rem;
    color: white;
}

.news-list-image-real {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.news-list-content {
    flex: 1;
    padding: 30px;
    display: flex;
    flex-direction: column;
}

.news-list-meta {
    margin-bottom: 15px;
}

.news-list-title {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-list-excerpt {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.news-read-more {
    align-self: flex-start;
}

.no-news {
    text-align: center;
    padding: 60px 20px;
    color: #666;
    font-size: 1.1rem;
}

/* 新闻详情模态框样式 */
.news-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.news-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.news-modal-content {
    background: white;
    border-radius: 10px;
    max-width: 700px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    z-index: 1001;
}

.news-modal-header {
    padding: 30px 30px 20px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.news-modal-header h2 {
    color: var(--text-dark);
    margin: 0;
    flex: 1;
    line-height: 1.4;
}

.news-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
    padding: 0;
    margin-left: 20px;
}

.news-modal-close:hover {
    color: var(--primary-blue);
}

.news-modal-body {
    padding: 30px;
}

.news-modal-meta {
    margin-bottom: 20px;
    color: #666;
}

.news-modal-content-text {
    line-height: 1.8;
    color: var(--text-dark);
}

/* 文章详情页面样式 */
.article-detail-section {
    padding: 40px 0;
}

.breadcrumb {
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--primary-blue);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.article-content {
    background: white;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
}

.article-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--gray);
}

.article-header h1 {
    font-size: 2rem;
    color: var(--text-dark);
    line-height: 1.4;
    margin-bottom: 15px;
}

.article-meta {
    display: flex;
    gap: 20px;
    color: #666;
    font-size: 0.9rem;
}

.article-body {
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 30px;
}

.article-body p {
    margin-bottom: 20px;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 5px;
    margin: 20px 0;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--gray);
    padding-top: 20px;
}

.article-tags h4 {
    margin-bottom: 10px;
    color: var(--text-dark);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    list-style: none;
}

.tag-item {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.related-articles {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.related-articles h3 {
    color: var(--primary-blue);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.pagination button {
    padding: 8px 15px;
    background: white;
    border: 1px solid var(--gray);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .news-list-item {
        flex-direction: column;
    }
    
    .news-list-image {
        width: 100%;
        min-height: 150px;
    }
    
    .news-list-content {
        padding: 20px;
    }
    
    .news-modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .news-modal-header {
        padding: 20px 20px 15px;
    }
    
    .news-modal-body {
        padding: 20px;
    }
    
    .article-content {
        padding: 20px;
    }
    
    .article-header h1 {
        font-size: 1.6rem;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 5px;
    }
    
    .article-footer {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
    }
}

/* 志愿任务部分样式 */
.volunteer-tasks-section {
    background-color: var(--light-blue);
    padding: 80px 0;
    margin: 60px 0;
}
.volunteer-tasks-section .loading-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 30px;
    color: var(--primary-blue);
}

.task-filter {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    background: white;
    border: 2px solid var(--gray);
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    color: #666;
}
.filter-btn:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

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

.task-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

/* 新的任务卡片样式 - 与新闻卡片保持一致 */
.task-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.task-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* 任务卡片图片区域 - 类似新闻卡片 */
.task-card .task-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    position: relative;
    overflow: hidden;
}

/* 状态徽章 */
.task-status-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255, 255, 255, 0.95);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dark);
}

.task-status-badge.task-status-open {
    background: var(--accent-green);
    color: white;
}

.task-status-badge.task-status-closed {
    background: #dc3545;
    color: white;
}

/* 任务卡片内容区域 - 类似新闻卡片 */
.task-card .task-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.task-card .task-type-label {
    color: var(--primary-blue);
    font-size: 0.9rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.task-card h3 {
    margin: 0 0 10px 0;
    color: var(--text-dark);
    font-size: 1.2rem;
    line-height: 1.4;
}

.task-card .task-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

/* 任务信息网格 */
.task-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.task-info-item {
    display: flex;
    align-items: center;
    gap: 5px;
    color: #666;
}

.task-info-item i {
    color: var(--primary-blue);
    width: 16px;
}

/* 查看详情按钮 */
.task-detail-btn {
    margin-top: auto;
    width: 100%;
    padding: 10px;
}

/* 保留旧版任务卡片样式作为备用 */
.task-card-header {
    background: #ffffff;
    color: var(--text-dark);
    padding: 20px;
    position: relative;
    border-bottom: 1px solid #f0f2f5;
}

.task-type-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.task-title {
    font-size: 1.4rem;
    margin-bottom: 10px;
    line-height: 1.3;
    color: var(--text-dark);
}

.task-date {
    font-size: 0.9rem;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 5px;
}

.task-date i {
    color: var(--primary-blue);
}

.task-card-body {
    padding: 25px;
    flex: 1;
}
/* 兼容备用任务结构样式 */
.task-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    padding: 20px;
}
.task-content { padding: 25px; }
.task-details { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-top: 10px; }
.task-details .task-detail { display: flex; align-items: center; gap: 6px; color: #666; }
.task-stats { display: flex; justify-content: space-between; align-items: center; margin-top: 15px; }
.task-actions { display: flex; gap: 10px; padding: 15px 25px; border-top: 1px solid #eee; }
.btn-register, .btn-detail { background: var(--accent-green); color: white; border: none; padding: 10px 16px; border-radius: 20px; cursor: pointer; transition: all 0.3s ease; display: inline-flex; align-items: center; gap: 6px; }
.btn-detail { background: var(--primary-blue); }
.btn-register:disabled { background: #ccc; cursor: not-allowed; }
.task-urgency.high { background: #ffe5e5; color: #d9534f; padding: 4px 8px; border-radius: 12px; font-size: 0.85rem; }
.task-urgency.medium { background: #fff6e5; color: #f0ad4e; padding: 4px 8px; border-radius: 12px; font-size: 0.85rem; }
.task-urgency.low { background: #e6f7ee; color: #28a745; padding: 4px 8px; border-radius: 12px; font-size: 0.85rem; }

.task-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.task-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: #888;
}

.task-location {
    display: flex;
    align-items: center;
    gap: 5px;
}

.task-participants {
    display: flex;
    align-items: center;
    gap: 5px;
}

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

.task-points {
    background: linear-gradient(135deg, var(--accent-orange) 0%, #ff8533 100%);
    color: white;
    padding: 8px 15px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.task-register-btn {
    background: var(--accent-green);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.task-register-btn:hover {
    background: #218838;
    transform: translateY(-2px);
}

.task-register-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.task-status {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent-orange);
    color: white;
    padding: 8px 15px;
    border-radius: 0 15px 0 15px;
    font-size: 0.85rem;
    font-weight: 600;
}

.task-status.open {
    background: var(--accent-green);
}

.task-status.closed {
    background: #dc3545;
}

.task-status.completed {
    background: #6c757d;
}

/* 任务详情模态框 */
.task-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.task-modal-content {
    background: white;
    border-radius: 15px;
    max-width: 700px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.task-modal-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    padding: 30px;
    border-radius: 15px 15px 0 0;
}

.task-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.task-modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.task-modal-body {
    padding: 30px;
}

.task-detail-section {
    margin-bottom: 25px;
}

.task-detail-section h3 {
    color: var(--primary-blue);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.task-detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.task-detail-item {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
}

.task-detail-label {
    font-weight: 600;
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.task-detail-value {
    color: var(--text-dark);
    font-size: 1rem;
}

.task-registration-form {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 10px;
    margin-top: 20px;
}

.task-registration-form h3 {
    color: var(--primary-blue);
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

.btn-submit {
    background: var(--accent-green);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.btn-submit:hover {
    background: #218838;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .task-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .task-filter {
        justify-content: flex-start;
        overflow-x: auto;
        gap: 8px;
        padding-bottom: 10px;
    }
    
    .filter-btn {
        white-space: nowrap;
        min-width: auto;
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    
    .task-card-header {
        padding: 15px;
    }
    
    .task-title {
        font-size: 1.2rem;
    }
    
    .task-card-body {
        padding: 20px;
    }
    
    .task-footer {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    .task-register-btn {
        justify-content: center;
    }
    
    .task-modal-content {
        width: 95%;
        margin: 20px 0;
    }
    
    .task-modal-header, .task-modal-body {
        padding: 20px;
    }
    
    .task-detail-grid {
        grid-template-columns: 1fr;
    }
}

/* 加载状态指示器 */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--primary-blue);
    font-size: 1.2rem;
}

.loading-spinner i {
    font-size: 3rem;
    margin-bottom: 15px;
    animation: spin 1s linear infinite;
}

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

.loading-spinner p {
    margin: 0;
    color: #666;
}

/* 错误提示 */
.error-message {
    text-align: center;
    padding: 60px 20px;
    color: #dc3545;
}

.error-message i {
    font-size: 3rem;
    margin-bottom: 15px;
}

.error-message p {
    margin: 10px 0;
    font-size: 1.1rem;
}

.error-message button {
    margin-top: 20px;
}

/* Logo图片错误处理 */
.logo img.error {
    display: none;
}

.logo .logo-placeholder {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

/* 内容居中按钮区域 */
.btn-center {
    text-align: center;
    margin-top: 40px;
}
/* 移动端导航菜单样式 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active {
    display: block;
    opacity: 1;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 80%;
    max-width: 300px;
    height: 100%;
    background-color: white;
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    padding: 20px;
    background-color: var(--primary-blue);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-menu-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

.mobile-nav {
    padding: 20px;
    list-style: none;
}

.mobile-nav li {
    margin-bottom: 10px;
}

.mobile-nav a {
    display: block;
    padding: 12px 15px;
    color: var(--text-dark);
    text-decoration: none;
    border-radius: 6px;
    transition: background-color 0.3s ease;
}

.mobile-nav a:hover {
    background-color: var(--light-blue);
    color: var(--primary-blue);
}

.mobile-nav a.active {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    font-weight: 600;
}

.mobile-more-btn {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 12px 15px;
    background: none;
    border: none;
    color: var(--text-dark);
    font-size: 1rem;
    cursor: pointer;
    border-radius: 6px;
    transition: background-color 0.3s ease;
}

.mobile-more-btn:hover {
    background-color: var(--light-blue);
    color: var(--primary-blue);
}

.mobile-more-btn.active i {
    transform: rotate(180deg);
}

.mobile-more-dropdown {
    display: none;
    padding-left: 20px;
    list-style: none;
}

.mobile-more-dropdown li {
    margin-bottom: 5px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    nav ul {
        display: none;
    }
    
    .hero-slider {
        height: 300px;
    }
    
    .slider-title {
        font-size: 1.5rem;
    }
    
    .slider-content {
        padding: 20px;
    }
    
    .intro-content,
    .join-content {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .services,
    .products,
    .points-info,
    .features {
        grid-template-columns: 1fr;
    }
    
    .reports-table-container {
        overflow-x: auto;
    }
    
    .reports-table {
        min-width: 600px;
    }

    /* 移动端赞助按钮样式 */
    .sponsor-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .sponsor-buttons .btn {
        width: 100%;
        max-width: 200px;
    }
}

/* 赞助选项样式 */
.btn-orange {
    background-color: #ff9500;
}

.btn-orange:hover {
    background-color: #e88500;
}

.sponsor-options {
    text-align: center;
    margin-top: 20px;
}

.sponsor-buttons {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.sponsor-buttons .btn {
    min-width: 140px;
    font-size: 1.1rem;
    padding: 12px 25px;
}

/* 物资资助模态框样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    border-bottom: 1px solid #eee;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    border-radius: 12px 12px 0 0;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.modal-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.file-upload-container {
    border: 2px dashed #ddd;
    border-radius: 6px;
    padding: 20px;
    text-align: center;
    transition: border-color 0.3s ease;
    cursor: pointer;
}

.file-upload-container:hover {
    border-color: var(--primary-blue);
}

.file-upload-container input[type="file"] {
    display: none;
}

.file-info {
    color: #666;
}

.file-info i {
    font-size: 2rem;
    margin-bottom: 10px;
    color: #999;
}

.file-preview {
    display: flex;
    align-items: center;
    background: #f8f9fa;
    padding: 15px;
    border-radius: 6px;
    margin-top: 10px;
}

.file-preview i {
    color: var(--primary-blue);
    margin-right: 10px;
    font-size: 1.2rem;
}

.file-name {
    flex: 1;
    font-weight: 500;
}

.file-remove {
    background: #dc3545;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
}

.file-remove:hover {
    background: #c82333;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.btn-secondary {
    background: #6c757d;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
    position: relative;
}

.btn-primary:hover:not(:disabled) {
    background: var(--dark-blue);
}

.btn-primary:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.loading-spinner {
    display: inline-block;
    margin-left: 8px;
}

/* 消息提示样式 */
.message-alert {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 10000;
    animation: slideInRight 0.3s ease;
    max-width: 400px;
}

.message-success {
    border-left: 4px solid var(--accent-green);
}

.message-error {
    border-left: 4px solid #dc3545;
}

.message-alert i {
    font-size: 1.2rem;
}

.message-success i {
    color: var(--accent-green);
}

.message-error i {
    color: #dc3545;
}

.message-close {
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.message-close:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* 物资资助模态框响应式设计 */
@media (max-width: 768px) {
    .modal-overlay {
        padding: 10px;
        align-items: flex-start;
        padding-top: 40px;
    }
    
    .modal-content {
        width: 100%;
        max-width: 100%;
        margin: 0;
        max-height: calc(100vh - 50px);
        border-radius: 12px 12px 0 0;
    }
    
    .modal-header {
        padding: 15px 20px;
        position: sticky;
        top: 0;
        z-index: 10;
    }
    
    .modal-header h3 {
        font-size: 1.2rem;
    }
    
    .modal-body {
        padding: 20px;
        max-height: calc(100vh - 150px);
        overflow-y: auto;
    }
    
    .form-group {
        margin-bottom: 15px;
    }
    
    .form-group input {
        padding: 10px 12px;
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    .file-upload-container {
        padding: 15px;
    }
    
    .form-actions {
        flex-direction: column;
        gap: 10px;
        margin-top: 20px;
        padding-top: 15px;
        position: sticky;
        bottom: 0;
        background: white;
        z-index: 10;
    }
    
    .form-actions .btn {
        width: 100%;
        padding: 12px;
    }
}

@media (max-width: 480px) {
    .modal-header {
        padding: 12px 15px;
    }
    
    .modal-body {
        padding: 15px;
    }
    
    .form-group label {
        font-size: 0.9rem;
    }
    
    .file-upload-container {
        padding: 12px;
    }
    
    .file-info i {
        font-size: 1.5rem;
    }
    
    .file-preview {
        padding: 10px;
    }
    
    .form-actions {
        padding: 15px;
        margin: 0 -15px -15px -15px;
    }
}