:root {
            --f8a5-primary: #ff4d4d;
            --f8a5-secondary: #4a90e2;
            --f8a5-accent: #ff9a44;
            --f8a5-text-dark: #2d3436;
            --f8a5-text-light: #636e72;
            --f8a5-bg-white: #ffffff;
            --f8a5-bg-gray: #f9f9f9;
            --f8a5-gradient-hero: linear-gradient(135deg, #fff5f5 0%, #f0f7ff 100%);
            --f8a5-spacing-unit: 8px;
            --f8a5-max-width: 1300px;
            --f8a5-transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--f8a5-transition);
        }

        ul {
            list-style: none;
        }

        /* 布局基础 */
        .f8a5-container {
            max-width: var(--f8a5-max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .f8a5-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .f8a5-flex-item {
            min-width: 0;
        }

        /* 导航栏 */
        .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);
            transition: var(--f8a5-transition);
        }

        .f8a5-nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            flex-wrap: wrap;
        }

        .f8a5-logo {
            display: flex;
            align-items: center;
            height: 100%;
        }

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

        .f8a5-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .f8a5-menu-item a {
            font-size: 15px;
            font-weight: 500;
            color: var(--f8a5-text-dark);
            padding: 8px 4px;
            position: relative;
        }

        .f8a5-menu-item a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--f8a5-primary);
            transition: var(--f8a5-transition);
        }

        .f8a5-menu-item a:hover::after,
        .f8a5-menu-item.f8a5-active a::after {
            width: 100%;
        }

        .f8a5-menu-item.f8a5-active a {
            color: var(--f8a5-primary);
        }

        /* Hero 区块 - 独特非对称设计 */
        .f8a5-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: var(--f8a5-gradient-hero);
            position: relative;
            overflow: hidden;
        }

        .f8a5-hero::before {
            content: '';
            position: absolute;
            top: -10%;
            right: -5%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 77, 77, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 0;
        }

        .f8a5-hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
            text-align: center;
            margin: 0 auto;
        }

        .f8a5-hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 77, 77, 0.1);
            color: var(--f8a5-primary);
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .f8a5-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            line-height: 1.2;
            font-weight: 800;
            color: #1a1a1a;
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .f8a5-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--f8a5-text-light);
            margin-bottom: 48px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .f8a5-hero-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .f8a5-btn {
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--f8a5-transition);
            border: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .f8a5-btn-primary {
            background: linear-gradient(90deg, var(--f8a5-primary), #ff7675);
            color: white;
            box-shadow: 0 10px 20px rgba(255, 77, 77, 0.2);
        }

        .f8a5-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 77, 77, 0.3);
        }

        .f8a5-btn-secondary {
            background: white;
            color: var(--f8a5-text-dark);
            border: 1px solid #e0e0e0;
        }

        .f8a5-btn-secondary:hover {
            background: #f5f5f5;
            transform: translateY(-3px);
        }

        /* 功能卡片区 - Grid布局 */
        .f8a5-features {
            padding: 96px 0;
            background: white;
        }

        .f8a5-section-head {
            text-align: center;
            margin-bottom: 64px;
        }

        .f8a5-section-title {
            font-size: clamp(1.8rem, 3vw + 0.5rem, 2.5rem);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .f8a5-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .f8a5-feature-card {
            background: var(--f8a5-bg-gray);
            padding: 48px;
            border-radius: 24px;
            transition: var(--f8a5-transition);
            border: 1px solid transparent;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .f8a5-feature-card:hover {
            background: white;
            border-color: rgba(255, 77, 77, 0.2);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
            transform: translateY(-8px);
        }

        .f8a5-card-icon {
            width: 64px;
            height: 64px;
            background: white;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            margin-bottom: 24px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
        }

        .f8a5-card-title {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #1a1a1a;
        }

        .f8a5-card-desc {
            font-size: 16px;
            color: var(--f8a5-text-light);
            line-height: 1.7;
        }

        /* 智慧写作 - 图文混排 */
        .f8a5-writing-section {
            padding: 96px 0;
            background: #fafafa;
        }

        .f8a5-split-layout {
            display: flex;
            align-items: center;
            gap: 64px;
            flex-wrap: wrap;
        }

        .f8a5-split-text {
            flex: 1;
            min-width: 320px;
        }

        .f8a5-split-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
        }

        .f8a5-visual-box {
            background: white;
            border-radius: 24px;
            padding: 32px;
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.08);
            border: 1px solid #eee;
        }

        .f8a5-typing-demo {
            font-family: monospace;
            border-right: 2px solid var(--f8a5-primary);
            padding-right: 5px;
            white-space: nowrap;
            overflow: hidden;
            width: fit-content;
        }

        .f8a5-ai-suggest {
            margin-top: 24px;
            padding-top: 24px;
            border-top: 1px dashed #ddd;
        }

        .f8a5-suggest-item {
            display: inline-block;
            padding: 8px 16px;
            background: #f0f7ff;
            color: var(--f8a5-secondary);
            border-radius: 8px;
            margin-right: 12px;
            margin-bottom: 12px;
            font-size: 14px;
            font-weight: 500;
        }

        /* 资讯区块 */
        .f8a5-dynamic-section {
            padding: 96px 0;
            background: white;
        }

        .f8a5-news-item {
            padding: 24px;
            border-bottom: 1px solid #f0f0f0;
            transition: var(--f8a5-transition);
        }

        .f8a5-news-item:hover {
            background: #fffafa;
        }

        .f8a5-news-date {
            font-size: 13px;
            color: #999;
            margin-bottom: 8px;
        }

        .f8a5-news-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--f8a5-text-dark);
        }

        /* 页脚 */
        .f8a5-footer {
            background: #1a1a1a;
            color: rgba(255, 255, 255, 0.8);
            padding: 80px 0 40px;
        }

        .f8a5-footer-top {
            display: flex;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 64px;
            flex-wrap: wrap;
        }

        .f8a5-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .f8a5-footer-logo-text {
            font-size: 24px;
            font-weight: 800;
            color: white;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .f8a5-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
        }

        .f8a5-link-group h4 {
            color: white;
            font-size: 16px;
            margin-bottom: 24px;
        }

        .f8a5-link-group ul li {
            margin-bottom: 12px;
        }

        .f8a5-link-group ul li a:hover {
            color: var(--f8a5-primary);
        }

        .f8a5-footer-bottom {
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 14px;
        }

        /* 响应式断点 */
        @media (max-width: 992px) {
            .f8a5-split-layout {
                flex-direction: column;
                text-align: center;
            }
            .f8a5-visual-box {
                margin: 0 auto;
            }
        }

        @media (max-width: 768px) {
            .f8a5-menu {
                display: none; /* 简化移动端展示 */
            }
            .f8a5-hero {
                padding-top: 120px;
                padding-bottom: 64px;
            }
            .f8a5-grid {
                grid-template-columns: 1fr;
            }
            .f8a5-footer-top {
                flex-direction: column;
            }
        }