:root {
            --f8a5-primary: #ff6600;
            --f8a5-primary-hover: #e55c00;
            --f8a5-bg: #f8faff;
            --f8a5-text: #2c3e50;
            --f8a5-text-light: #64748b;
            --f8a5-white: #ffffff;
            --f8a5-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --f8a5-radius: 16px;
            --f8a5-container-width: 1100px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--f8a5-bg);
            color: var(--f8a5-text);
            line-height: 1.8;
            overflow-x: hidden;
            word-break: keep-all;
            overflow-wrap: break-word;
        }

        /* 导航栏样式 */
        .f8a5-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 0 24px;
        }

        .f8a5-nav-container {
            max-width: var(--f8a5-container-width);
            margin: 0 auto;
            height: 72px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .f8a5-logo {
            display: flex;
            align-items: center;
            flex-shrink: 0;
        }

        .f8a5-logo img {
            height: 32px;
            width: auto;
        }

        .f8a5-nav-menu {
            display: flex;
            list-style: none;
            gap: 16px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .f8a5-nav-item a {
            text-decoration: none;
            color: var(--f8a5-text);
            font-weight: 500;
            font-size: 15px;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .f8a5-nav-item a:hover {
            color: var(--f8a5-primary);
            background: rgba(255, 102, 0, 0.05);
        }

        .f8a5-nav-item a.f8a5-active {
            color: var(--f8a5-primary);
            background: rgba(255, 102, 0, 0.1);
        }

        /* Hero 搜索区 */
        .f8a5-hero {
            padding: 160px 24px 80px;
            background: linear-gradient(135deg, #fff 0%, #f0f4ff 100%);
            text-align: center;
            position: relative;
        }

        .f8a5-hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .f8a5-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            font-weight: 800;
            margin-bottom: 24px;
            color: #1a1a1a;
            line-height: 1.2;
        }

        .f8a5-search-wrapper {
            background: var(--f8a5-white);
            padding: 8px;
            border-radius: 50px;
            display: flex;
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            margin-top: 48px;
            border: 2px solid transparent;
            transition: border-color 0.3s;
        }

        .f8a5-search-wrapper:focus-within {
            border-color: var(--f8a5-primary);
        }

        .f8a5-search-input {
            flex: 1;
            border: none;
            outline: none;
            padding: 12px 24px;
            font-size: 18px;
            border-radius: 50px;
            min-width: 0;
        }

        .f8a5-search-btn {
            background: var(--f8a5-primary);
            color: white;
            border: none;
            padding: 12px 40px;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s;
        }

        .f8a5-search-btn:hover {
            background: var(--f8a5-primary-hover);
            transform: scale(1.02);
        }

        /* 问题分类区 */
        .f8a5-section {
            padding: 80px 24px;
            max-width: var(--f8a5-container-width);
            margin: 0 auto;
        }

        .f8a5-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .f8a5-card {
            background: var(--f8a5-white);
            padding: 40px;
            border-radius: var(--f8a5-radius);
            box-shadow: var(--f8a5-shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(0,0,0,0.02);
        }

        .f8a5-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }

        .f8a5-card-tag {
            display: inline-block;
            padding: 4px 12px;
            background: #fff0e6;
            color: var(--f8a5-primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 4px;
            margin-bottom: 20px;
            align-self: flex-start;
        }

        .f8a5-card-h3 {
            font-size: 20px;
            margin-bottom: 16px;
            font-weight: 700;
        }

        .f8a5-card-p {
            color: var(--f8a5-text-light);
            font-size: 15px;
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .f8a5-link-btn {
            color: var(--f8a5-primary);
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* 独特的内容布局：左右交叉 */
        .f8a5-feature-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
        }

        .f8a5-feature-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .f8a5-feature-text {
            flex: 1;
            min-width: 300px;
        }

        .f8a5-feature-visual {
            flex: 1;
            min-width: 300px;
            background: linear-gradient(45deg, #ff9a44 0%, #fc6076 100%);
            height: 320px;
            border-radius: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 48px;
            font-weight: 900;
            box-shadow: 0 30px 60px rgba(252, 96, 118, 0.2);
        }

        .f8a5-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 24px;
            text-align: center;
        }

        /* 动态内容区样式 */
        .f8a5-article-list {
            list-style: none;
            background: var(--f8a5-white);
            border-radius: var(--f8a5-radius);
            padding: 16px;
            box-shadow: var(--f8a5-shadow);
        }

        .f8a5-article-item {
            padding: 20px;
            border-bottom: 1px solid #f1f5f9;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .f8a5-article-item:last-child {
            border-bottom: none;
        }

        .f8a5-article-title {
            font-weight: 500;
            color: var(--f8a5-text);
            text-decoration: none;
            transition: color 0.2s;
        }

        .f8a5-article-title:hover {
            color: var(--f8a5-primary);
        }

        .f8a5-article-date {
            color: var(--f8a5-text-light);
            font-size: 14px;
        }

        /* 页脚 */
        .f8a5-footer {
            background: #1a1a1a;
            color: #94a3b8;
            padding: 80px 24px 40px;
            text-align: center;
        }

        .f8a5-footer-brand {
            font-size: 24px;
            font-weight: 700;
            color: white;
            margin-bottom: 24px;
        }

        .f8a5-footer-links {
            display: flex;
            justify-content: center;
            gap: 32px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .f8a5-footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 14px;
        }

        .f8a5-footer-links a:hover {
            color: white;
        }

        .f8a5-copyright {
            border-top: 1px solid #334155;
            padding-top: 40px;
            font-size: 13px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .f8a5-nav-menu {
                display: none; /* 简化版移动端导航可以后续通过JS显示 */
            }
            .f8a5-hero {
                padding: 120px 24px 60px;
            }
            .f8a5-feature-row {
                gap: 32px;
            }
            .f8a5-feature-visual {
                height: 240px;
            }
        }