:root {
            --f8a5-primary: #ff6e0b;
            --f8a5-primary-dark: #ee1c25;
            --f8a5-bg-light: #ffffff;
            --f8a5-bg-gray: #f8f9fa;
            --f8a5-text-main: #222222;
            --f8a5-text-muted: #666666;
            --f8a5-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --f8a5-radius: 16px;
            --f8a5-container-width: 1300px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--f8a5-text-main);
            line-height: 1.6;
            overflow-x: hidden;
            background-color: var(--f8a5-bg-light);
            word-break: keep-all;
        }

        /* 导航栏 */
        .f8a5-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(15px);
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            display: flex;
            align-items: center;
        }

        .f8a5-nav-container {
            width: 100%;
            max-width: var(--f8a5-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

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

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

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

        .f8a5-nav-item {
            margin-left: 24px;
            min-width: 0;
        }

        .f8a5-nav-link {
            text-decoration: none;
            color: var(--f8a5-text-main);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
            padding: 8px 0;
        }

        .f8a5-nav-link:hover, .f8a5-nav-link.active {
            color: var(--f8a5-primary);
        }

        .f8a5-nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--f8a5-primary);
            border-radius: 2px;
        }

        /* Hero 区 */
        .f8a5-hero {
            padding: 160px 24px 80px;
            background: linear-gradient(135deg, #fff5f0 0%, #ffffff 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .f8a5-hero::before {
            content: "";
            position: absolute;
            top: -100px;
            right: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 110, 11, 0.1) 0%, transparent 70%);
            z-index: 0;
        }

        .f8a5-hero-content {
            position: relative;
            z-index: 1;
            max-width: 900px;
            margin: 0 auto;
            word-break: break-word;
        }

        .f8a5-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
            background: linear-gradient(to right, #222, var(--f8a5-primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .f8a5-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--f8a5-text-muted);
            margin-bottom: 48px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .f8a5-search-bar {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            background: #fff;
            padding: 8px;
            border-radius: 50px;
            box-shadow: 0 15px 40px rgba(255, 110, 11, 0.15);
            flex-wrap: wrap;
        }

        .f8a5-search-input {
            flex: 1;
            border: none;
            padding: 12px 24px;
            font-size: 16px;
            border-radius: 50px;
            outline: none;
            min-width: 200px;
        }

        .f8a5-search-btn {
            background: var(--f8a5-primary);
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, background 0.3s;
        }

        .f8a5-search-btn:hover {
            background: var(--f8a5-primary-dark);
            transform: scale(1.05);
        }

        /* 分类筛选 */
        .f8a5-filter-section {
            padding: 40px 24px;
            max-width: var(--f8a5-container-width);
            margin: 0 auto;
        }

        .f8a5-filter-tags {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .f8a5-tag {
            padding: 10px 24px;
            background: var(--f8a5-bg-gray);
            border-radius: 30px;
            text-decoration: none;
            color: var(--f8a5-text-muted);
            font-size: 14px;
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }

        .f8a5-tag:hover, .f8a5-tag.active {
            background: #fff;
            color: var(--f8a5-primary);
            border-color: var(--f8a5-primary);
            box-shadow: 0 4px 12px rgba(255, 110, 11, 0.1);
        }

        /* 表情包网格 */
        .f8a5-emoji-section {
            padding: 48px 24px 96px;
            max-width: var(--f8a5-container-width);
            margin: 0 auto;
        }

        .f8a5-grid-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .f8a5-emoji-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 32px;
        }

        .f8a5-emoji-card {
            background: #fff;
            border-radius: var(--f8a5-radius);
            overflow: hidden;
            transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            border: 1px solid #eee;
            position: relative;
            min-width: 0;
        }

        .f8a5-emoji-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--f8a5-shadow);
            border-color: transparent;
        }

        .f8a5-emoji-preview {
            width: 100%;
            aspect-ratio: 1/1;
            background: #fafafa;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .f8a5-emoji-preview .f8a5-placeholder-img {
            width: 80%;
            height: 80%;
            background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ccc;
            font-size: 12px;
        }

        .f8a5-emoji-info {
            padding: 20px;
            word-break: break-word;
        }

        .f8a5-emoji-name {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .f8a5-emoji-author {
            font-size: 14px;
            color: var(--f8a5-text-muted);
            margin-bottom: 16px;
        }

        .f8a5-download-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .f8a5-stats {
            font-size: 12px;
            color: #999;
        }

        .f8a5-btn-download-small {
            background: #fdf2f2;
            color: var(--f8a5-primary-dark);
            text-decoration: none;
            padding: 6px 16px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s;
        }

        .f8a5-btn-download-small:hover {
            background: var(--f8a5-primary-dark);
            color: #fff;
        }

        /* 动态内容区块 */
        .f8a5-trending-section {
            background: var(--f8a5-bg-gray);
            padding: 80px 24px;
        }

        .f8a5-trending-container {
            max-width: var(--f8a5-container-width);
            margin: 0 auto;
        }

        /* 底部引导 */
        .f8a5-cta {
            padding: 96px 24px;
            text-align: center;
            background: linear-gradient(135deg, var(--f8a5-primary) 0%, var(--f8a5-primary-dark) 100%);
            color: #fff;
            border-radius: 40px;
            margin: 40px 24px;
        }

        .f8a5-cta h2 {
            font-size: clamp(1.5rem, 4vw, 2.5rem);
            margin-bottom: 24px;
        }

        .f8a5-cta-btn {
            display: inline-block;
            background: #fff;
            color: var(--f8a5-primary-dark);
            padding: 16px 48px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            font-size: 18px;
            transition: transform 0.3s;
        }

        .f8a5-cta-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }

        /* 页脚 */
        .f8a5-footer {
            background: #1a1a1a;
            color: #999;
            padding: 80px 24px 40px;
        }

        .f8a5-footer-grid {
            max-width: var(--f8a5-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 60px;
        }

        .f8a5-footer-brand h3 {
            color: #fff;
            font-size: 24px;
            margin-bottom: 16px;
        }

        .f8a5-footer-links h4 {
            color: #fff;
            margin-bottom: 24px;
            font-size: 16px;
        }

        .f8a5-footer-links ul {
            list-style: none;
        }

        .f8a5-footer-links li {
            margin-bottom: 12px;
        }

        .f8a5-footer-links a {
            color: #999;
            text-decoration: none;
            transition: color 0.3s;
        }

        .f8a5-footer-links a:hover {
            color: var(--f8a5-primary);
        }

        .f8a5-footer-bottom {
            max-width: var(--f8a5-container-width);
            margin: 0 auto;
            border-top: 1px solid #333;
            padding-top: 30px;
            text-align: center;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .f8a5-nav-menu {
                display: none; /* 简化移动端，实际可做汉堡菜单 */
            }
            .f8a5-hero {
                padding: 120px 24px 60px;
            }
            .f8a5-emoji-grid {
                grid-template-columns: 1fr;
            }
            .f8a5-cta {
                margin: 20px;
                padding: 60px 20px;
                border-radius: 24px;
            }
        }

        /* JSON-LD 结构化数据辅助类 */
        .f8a5-hidden {
            display: none;
        }