/* --- 全局样式 Reset & Variables --- */
        :root {
            --primary-color: #800810;
            /* PRISMS Burgundy */
            --accent-color: #D4AF37;
            /* Gold */
            --text-color: #333;
            --light-bg: #fdfdfd;
            --white: #ffffff;
            --max-width: 1140px;
            --nav-height: 90px;
            --footer-bg: #1a1a1a;
            /* 深灰背景 */
            --footer-text: #ccc;
            /* 浅灰文字 */
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: 'Open Sans', sans-serif;
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
            padding-top: var(--nav-height);
            /* 防止导航栏遮挡内容 */
        }

        h1,
        h2,
        h3,
        h4 {
            font-family: 'Montserrat', sans-serif;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }

        a {
            text-decoration: none;
            transition: 0.3s;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* --- 按钮样式 --- */
        .btn {
            display: inline-block;
            padding: 10px 25px;
            border-radius: 4px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.9rem;
        }

        .btn-primary {
            background-color: var(--primary-color);
            color: var(--white);
            border: 2px solid var(--primary-color);
        }

        .btn-primary:hover {
            background-color: #5c0006;
            border-color: #5c0006;
        }

        .btn-gold {
            background-color: var(--accent-color);
            color: var(--white);
            border: 2px solid var(--accent-color);
        }

        .btn-gold:hover {
            background-color: #b5952f;
            border-color: #b5952f;
        }

        .btn-white {
            background-color: var(--white);
            color: var(--primary-color);
            border: 2px solid var(--white);
        }

        .btn-white:hover {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            color: var(--white);
        }

        /* --- 导航栏 (Header & Nav) --- */
        header {
            background-color: var(--white);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            position: fixed;
            /* 固定在顶部 */
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            border-top: 5px solid var(--primary-color);
            height: var(--nav-height);
        }

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

        /* === Logo 样式更新 === */
        .logo {
            display: flex;
            /* 确保图片垂直居中 */
            align-items: center;
            z-index: 1001;
        }

        .logo a {
            display: flex;
            /* 消除链接标签的默认间距 */
            align-items: center;
        }

        .logo img {
            height: 55px;
            /* 设置高度，宽度会自动按比例缩放 */
            width: auto;
            /* 保持图片比例 */
            object-fit: contain;
            /* 防止图片变形 */
            /* 如果 Logo 看起来贴得太紧，可以加一点 padding */
            padding: 5px 0;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .logo img {
                height: 45px;
                /* 手机端稍微缩小一点，避免拥挤 */
            }
        }

        /* 桌面端导航菜单 */
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 25px;
        }

        .nav-link {
            color: #444;
            font-weight: 600;
            font-size: 0.95rem;
            position: relative;
            font-family: 'Montserrat', sans-serif;
        }

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

        /* 下拉菜单样式 */
        .dropdown {
            position: relative;
            display: inline-block;
        }

        .dropdown-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            background-color: var(--primary-color);
            min-width: 250px;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
            border-radius: 4px;
            z-index: 1000;
            padding: 10px 0;
            margin-top: 15px;
            /* 增加一点间距 */
        }

        /* 增加一个小三角指向菜单 */
        .dropdown-menu::before {
            content: "";
            position: absolute;
            top: -10px;
            left: 50%;
            margin-left: -10px;
            border-width: 10px;
            border-style: solid;
            border-color: transparent transparent var(--primary-color) transparent;
        }

        /* 创建一个透明桥梁，防止鼠标移开时菜单立刻消失 */
        .dropdown::after {
            content: '';
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            height: 20px;
        }

        .dropdown:hover .dropdown-menu {
            display: block;
            /* animation: fadeIn 0.3s ease; */
        }

        .dropdown-item {
            color: var(--white);
            padding: 12px 20px;
            text-decoration: none;
            display: block;
            font-size: 0.9rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .dropdown-item:last-child {
            border-bottom: none;
        }

        .dropdown-item:hover {
            background-color: var(--accent-color);
            color: var(--white);
        }

        /* 汉堡菜单图标 (移动端) */
        .hamburger {
            display: none;
            cursor: pointer;
            font-size: 1.5rem;
            color: var(--primary-color);
            z-index: 1001;
        }

        /* --- Hero Section --- */
        .hero {
            background: linear-gradient(rgba(128, 8, 16, 0.8), rgba(60, 0, 5, 0.8)), url('https://placehold.co/1920x800/800810/FFFFFF/png?text=PRISMS+Community');
            background-size: cover;
            background-position: center;
            height: 75vh;
            display: flex;
            align-items: center;
            text-align: center;
            color: var(--white);
        }

        .hero-content h1 {
            color: var(--white);
            font-size: 3.2rem;
            margin-bottom: 20px;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        }

        .hero-content p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 35px;
            font-weight: 300;
        }

        /* --- Sections --- */
        .intro-section {
            padding: 90px 0;
            text-align: center;
            background-color: var(--white);
        }

        .intro-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .intro-content p {
            font-size: 1.1rem;
            color: #555;
        }

        .intro-content strong {
            color: var(--primary-color);
            font-size: 1.2rem;
        }

        .impact-section {
            background-color: #f4f4f4;
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: var(--accent-color);
            margin: 15px auto 0;
        }

        .impact-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .impact-card {
            background: var(--white);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            border-bottom: 3px solid transparent;
        }

        .impact-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            border-bottom: 3px solid var(--accent-color);
        }

        .card-image {
            height: 220px;
            background-color: #ddd;
            background-size: cover;
            background-position: center;
        }

        .card-content {
            padding: 30px;
            flex-grow: 1;
        }

        .card-content h3 {
            font-size: 1.35rem;
            margin-bottom: 15px;
            color: var(--primary-color);
        }

        .card-content p {
            font-size: 0.95rem;
            color: #666;
            line-height: 1.7;
        }

        .cta-section {
            padding: 100px 0;
            background-color: var(--primary-color);
            background-image: linear-gradient(135deg, #800810 0%, #5c0006 100%);
            color: var(--white);
            text-align: center;
        }

        .cta-section h2 {
            color: var(--white);
            margin-bottom: 25px;
            font-size: 2.2rem;
        }

        /* footer {
            background-color: #1a1a1a;
            color: #888;
            padding: 50px 0;
            text-align: center;
            font-size: 0.9rem;
            border-top: 3px solid var(--accent-color);
        } */

        /* --- 动画 Keyframes --- */
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translate(-50%, 10px);
            }

            to {
                opacity: 1;
                transform: translate(-50%, 0);
            }
        }

        /* --- 响应式设计 --- */
        @media (max-width: 992px) {
            .hamburger {
                display: block;
            }

            .nav-menu {
                position: fixed;
                top: 0;
                right: -100%;
                /* 默认隐藏在右侧 */
                width: 70%;
                height: 100vh;
                background-color: var(--white);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                transition: 0.4s ease;
                box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
                padding-top: 60px;
            }

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

            .nav-menu a {
                margin: 15px 0;
                font-size: 1.1rem;
            }

            /* 移动端 Dropdown 处理 */
            .dropdown {
                width: 100%;
                text-align: center;
            }

            .dropdown-menu {
                position: static;
                /* 移动端不绝对定位 */
                transform: none;
                background-color: #f4f4f4;
                box-shadow: none;
                width: 100%;
                display: none;
                /* JS Toggle */
                padding: 0;
            }

            .dropdown-menu::before {
                display: none;
            }

            .dropdown-item {
                color: #333;
                border-bottom: 1px solid #ddd;
            }

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

            .hero-content h1 {
                font-size: 2.2rem;
            }
        }


        /* === Ways to Give 页面专用样式 === */

        /* 页面顶部 Hero 图片 */
        .ways-hero {
            /* 这里建议换一张不同于主页的图片 */
            background: linear-gradient(rgba(128, 8, 16, 0.85), rgba(60, 0, 5, 0.85)), url('https://placehold.co/1920x600/800810/FFFFFF/png?text=Ways+to+Give');
            background-size: cover;
            background-position: center;
            padding: 120px 0 80px;
            /* 调整内边距适应导航栏高度 */
            text-align: center;
            color: var(--white);
        }

        .ways-hero h1 {
            color: var(--white);
            font-size: 2.8rem;
            margin-bottom: 15px;
        }

        /* 捐赠方式卡片区域 */
        .ways-grid-section {
            padding: 80px 0;
            background-color: #fdfdfd;
        }

        .ways-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
            margin-top: -100px;
            /* 让卡片稍微上浮压住 Hero 区域，增加设计感 */
            position: relative;
            z-index: 10;
        }

        .ways-card {
            background: var(--white);
            border-radius: 8px;
            padding: 40px 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            border-top: 4px solid var(--accent-color);
            /* 顶部金色线条 */
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }

        .ways-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
        }

        .ways-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 25px;
            background: #f8f8f8;
            width: 80px;
            height: 80px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .ways-content {
            flex-grow: 1;
            width: 100%;
            text-align: left;
            margin-bottom: 20px;
            color: #555;
            font-size: 0.95rem;
        }

        .ways-content ul {
            list-style: none;
            padding: 0;
        }

        .ways-content li {
            margin-bottom: 12px;
            padding-left: 15px;
            position: relative;
        }

        .ways-content li::before {
            content: "•";
            color: var(--accent-color);
            font-weight: bold;
            position: absolute;
            left: 0;
        }

        /* 特殊样式：Zelle 标签 */
        .tag-zelle {
            background-color: #6d1ed4;
            color: white;
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 0.8rem;
            margin-right: 4px;
        }

        /* 特殊样式：地址框 */
        .address-box {
            background: #f4f4f4;
            padding: 15px;
            border-radius: 4px;
            font-family: monospace;
            font-size: 0.9rem;
            color: #333;
            border-left: 3px solid var(--primary-color);
            margin-top: 10px;
            text-align: center;
        }

        /* 底部法律声明区域 */
        .legal-section {
            padding: 60px 0;
            text-align: center;
            background-color: #fff;
            border-top: 1px solid #eee;
        }

        .legal-text {
            max-width: 800px;
            margin: 0 auto;
            color: #666;
            font-size: 0.9rem;
        }

        /* 导航栏当前页高亮 (如果有 active 类) */
        .nav-link.active {
            color: var(--primary-color);
            font-weight: 700;
        }

        /* === Contact Page 专用样式 === */

        /* 顶部 Hero 区域 - 建议换一张办公室或校园互动的温馨照片 */
        .contact-hero {
            background: linear-gradient(rgba(128, 8, 16, 0.85), rgba(60, 0, 5, 0.85)), url('https://placehold.co/1920x600/800810/FFFFFF/png?text=Contact+Us');
            background-size: cover;
            background-position: center;
            padding: 120px 0 80px;
            text-align: center;
            color: var(--white);
        }

        .contact-hero h1 {
            font-size: 2.8rem;
            margin-bottom: 10px;
            color: var(--white);
        }

        .contact-hero p {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 联系人卡片容器 */
        .staff-section {
            padding: 80px 0;
            background-color: #fdfdfd;
        }

        .staff-grid {
            display: grid;
            /* 限制卡片最小宽度，确保横向排列时不会太挤 */
            grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
            gap: 40px;
            margin-top: -100px;
            /* 上浮效果 */
            position: relative;
            z-index: 10;
        }

        /* 名片式设计 - 左右布局 */
        .staff-card {
            display: flex;
            background: var(--white);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            min-height: 220px;
            /* 保证卡片高度一致 */
        }

        .staff-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        /* 左侧：深红色身份区 */
        .staff-left {
            background-color: var(--primary-color);
            color: var(--white);
            flex-basis: 35%;
            /* 占宽 35% */
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            /* 居中对齐 */
            padding: 30px 20px;
            text-align: center;
            position: relative;
        }

        .staff-left h3 {
            color: var(--white);
            font-size: 1.4rem;
            margin-bottom: 8px;
            font-weight: 700;
        }

        .staff-left p {
            font-family: 'Montserrat', sans-serif;
            font-size: 0.95rem;
            font-weight: 500;
            opacity: 0.9;
            line-height: 1.4;
        }

        /* 右侧：白色信息区 */
        .staff-right {
            flex-basis: 65%;
            padding: 30px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .contact-label {
            font-family: 'Montserrat', sans-serif;
            color: var(--primary-color);
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
            /* 细灰线 */
        }

        .contact-detail-item {
            margin-bottom: 15px;
        }

        .contact-detail-title {
            font-weight: 700;
            font-size: 0.9rem;
            color: #333;
            display: block;
            margin-bottom: 3px;
        }

        .contact-detail-link {
            color: #555;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color 0.2s;
        }

        .contact-detail-link i {
            color: #666;
            font-size: 0.9rem;
        }

        .contact-detail-link:hover {
            color: var(--primary-color);
        }

        .contact-detail-link:hover i {
            color: var(--primary-color);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .staff-grid {
                grid-template-columns: 1fr;
                /* 手机端单列 */
                margin-top: 0;
                /* 取消上浮 */
                padding: 0 10px;
            }

            .staff-card {
                flex-direction: column;
                /* 卡片内部变为上下布局 */
                text-align: center;
            }

            .staff-left,
            .staff-right {
                flex-basis: auto;
                width: 100%;
                padding: 30px;
            }

            .staff-right {
                align-items: center;
                /* 内容居中 */
            }

            .contact-detail-link {
                justify-content: center;
            }
        }

        /* === Capital & Endowment Page 专用样式 === */

        /* Hero 区域：建议使用一张宏大的校园建筑或实验室全景图 */
        .capital-hero {
            background: linear-gradient(rgba(128, 8, 16, 0.9), rgba(60, 0, 5, 0.9)), url('https://placehold.co/1920x600/800810/FFFFFF/png?text=Building+The+Future');
            background-size: cover;
            background-position: center;
            padding: 120px 0 80px;
            text-align: center;
            color: var(--white);
        }

        .capital-hero h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
            color: var(--white);
        }

        .capital-hero p {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto;
        }

        /* 基金项目区域容器 */
        .funds-section {
            padding: 80px 0;
            background-color: var(--white);
        }

        /* 单个基金行 - Flex 布局 */
        .fund-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 60px;
            margin-bottom: 100px;
            /* 项目之间的间距 */
        }

        /* 最后一个项目去掉底部间距 */
        .fund-row:last-child {
            margin-bottom: 0;
        }

        /* 反向排列类 (用于实现 Z 字形布局) */
        .fund-row.reverse {
            flex-direction: row-reverse;
        }

        /* 图片区域 */
        .fund-image {
            flex: 1;
            position: relative;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            height: 400px;
            /* 固定高度确保整齐 */
        }

        .fund-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        /* 图片悬停微动效果 */
        .fund-image:hover img {
            transform: scale(1.05);
        }

        /* 内容区域 */
        .fund-content {
            flex: 1;
        }

        .fund-label {
            color: var(--accent-color);
            /* 金色小标题 */
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-size: 0.9rem;
            margin-bottom: 10px;
            display: block;
            font-family: 'Montserrat', sans-serif;
        }

        .fund-content h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1.3;
        }

        .fund-content p {
            font-size: 1.05rem;
            color: #555;
            margin-bottom: 30px;
            line-height: 1.8;
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .fund-row {
                flex-direction: column !important;
                /* 强制手机端垂直排列 */
                gap: 30px;
                margin-bottom: 60px;
            }

            .fund-image {
                width: 100%;
                height: 300px;
                /* 手机端图片高度减小 */
            }

            .fund-content {
                width: 100%;
                text-align: left;
            }

            .capital-hero h1 {
                font-size: 2.2rem;
            }
        }

        /* Footer 容器基础设置 */
        footer {
            background-color: var(--footer-bg);
            color: var(--footer-text);
            padding: 70px 0 30px;
            /* 上方留足空间，下方紧凑 */
            border-top: 4px solid var(--accent-color);
            /* 顶部的金色分割线 */
            font-size: 0.9rem;
        }

        /* Grid 布局：实现三列自动排列 */
        .footer-grid {
            display: grid;
            /* 响应式核心：每列最小250px，空间不足自动换行 */
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 50px;
        }

        /* --- 栏目内容样式 --- */

        /* 标题 H4 */
        .footer-col h4 {
            color: var(--white);
            margin-bottom: 25px;
            font-size: 1.1rem;
            position: relative;
            padding-bottom: 10px;
            font-weight: 600;
            font-family: 'Montserrat', sans-serif;
        }

        /* 标题下方的金色装饰短线 */
        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 2px;
            background-color: var(--accent-color);
        }

        /* 段落文字 */
        .footer-col p {
            margin-bottom: 15px;
            line-height: 1.8;
        }

        /* 图标 (FontAwesome) */
        .footer-col i {
            width: 25px;
            color: var(--accent-color);
            /* 金色图标 */
            text-align: center;
            margin-right: 5px;
        }

        /* --- 链接列表样式 --- */
        .footer-col ul {
            list-style: none;
            /* 去除列表圆点 */
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            color: #aaa;
            transition: all 0.3s ease;
            display: inline-block;
            /* 必须设为 block 或 inline-block 才能做 transform 动画 */
            text-decoration: none;
        }

        /* 链接悬停特效：变金 + 右移 */
        .footer-col ul li a:hover {
            color: var(--accent-color);
            transform: translateX(5px);
        }

        /* --- 底部版权栏 --- */
        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #333;
            /* 深色分割线 */
            color: #666;
        }

        /* --- 响应式微调 (请确保这段在 @media 查询内) --- */
        @media (max-width: 992px) {
            .footer-grid {
                /* 移动端确保文字左对齐，阅读更舒服 */
                text-align: left;
            }

        }