:root {
            --ac83o-primary: #D42D2D;
            --ac83o-primary-glow: rgba(212, 45, 45, 0.15);
            --ac83o-dark: #1A1A1B;
            --ac83o-text: #2D2D2F;
            --ac83o-text-light: #646466;
            --ac83o-bg: #F8FAFC;
            --ac83o-white: #FFFFFF;
            --ac83o-border: #E2E8F0;
            --ac83o-radius: 16px;
            --ac83o-shadow: 0 10px 30px -10px rgba(0,0,0,0.08);
            --ac83o-container: 1400px;
        }

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

        body {
            font-family: "Inter", "Microsoft YaHei", "PingFang SC", sans-serif;
            background-color: var(--ac83o-bg);
            color: var(--ac83o-text);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 布局基础 */
        .ac83o-container {
            max-width: var(--ac83o-container);
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }

        /* 导航栏 */
        .ac83o-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--ac83o-border);
            z-index: 1000;
            height: 72px;
            display: flex;
            align-items: center;
        }

        .ac83o-nav-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            flex-wrap: wrap;
        }

        .ac83o-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .ac83o-logo img {
            height: 32px;
            width: auto;
        }

        .ac83o-menu {
            display: flex;
            list-style: none;
            gap: 24px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .ac83o-menu-item a {
            text-decoration: none;
            color: var(--ac83o-text-light);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.3s;
            white-space: nowrap;
        }

        .ac83o-menu-item a:hover,
        .ac83o-menu-item.active a {
            color: var(--ac83o-primary);
        }

        /* Hero 区块 - 独特非对称布局 */
        .ac83o-hero {
            padding: 160px 0 96px;
            background: radial-gradient(circle at 90% 10%, var(--ac83o-primary-glow) 0%, transparent 40%),
                        radial-gradient(circle at 10% 90%, #e0f2fe 0%, transparent 40%);
            position: relative;
        }

        .ac83o-hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .ac83o-hero-content {
            flex: 1;
            min-width: 350px;
            word-break: break-word;
        }

        .ac83o-hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: var(--ac83o-primary-glow);
            color: var(--ac83o-primary);
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .ac83o-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--ac83o-dark);
        }

        .ac83o-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.35rem);
            color: var(--ac83o-text-light);
            max-width: 600px;
            margin-bottom: 40px;
        }

        .ac83o-search-bar {
            background: var(--ac83o-white);
            padding: 8px 8px 8px 24px;
            border-radius: 50px;
            display: flex;
            align-items: center;
            box-shadow: var(--ac83o-shadow);
            border: 1px solid var(--ac83o-border);
            max-width: 500px;
        }

        .ac83o-search-bar input {
            border: none;
            outline: none;
            flex: 1;
            font-size: 16px;
            min-width: 0;
        }

        .ac83o-search-btn {
            background: var(--ac83o-primary);
            color: var(--ac83o-white);
            border: none;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s;
        }

        .ac83o-search-btn:hover {
            transform: scale(1.05);
        }

        /* 快捷键导航卡片 */
        .ac83o-module-nav {
            padding: 48px 0;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .ac83o-module-card {
            background: var(--ac83o-white);
            padding: 32px;
            border-radius: var(--ac83o-radius);
            border: 1px solid var(--ac83o-border);
            transition: all 0.3s ease;
            cursor: pointer;
            min-width: 0;
            overflow-wrap: break-word;
        }

        .ac83o-module-card:hover {
            border-color: var(--ac83o-primary);
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(212, 45, 45, 0.08);
        }

        .ac83o-module-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: bold;
        }

        .ac83o-icon-writer { background: #EBF5FF; color: #1E88E5; }
        .ac83o-icon-sheet { background: #E8F5E9; color: #43A047; }
        .ac83o-icon-ppt { background: #FFF3E0; color: #FB8C00; }
        .ac83o-icon-pdf { background: #FFEBEE; color: #E53935; }

        .ac83o-module-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .ac83o-module-desc {
            font-size: 14px;
            color: var(--ac83o-text-light);
        }

        /* 主快捷键列表区 */
        .ac83o-shortcut-section {
            padding: 96px 0;
            background: var(--ac83o-white);
        }

        .ac83o-section-header {
            margin-bottom: 64px;
            text-align: center;
        }

        .ac83o-section-title {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .ac83o-grid-layout {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
            gap: 32px;
        }

        .ac83o-shortcut-group {
            background: var(--ac83o-bg);
            border-radius: var(--ac83o-radius);
            padding: 32px;
            min-width: 0;
        }

        .ac83o-group-label {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 24px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--ac83o-border);
            display: flex;
            justify-content: space-between;
        }

        .ac83o-key-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid rgba(0,0,0,0.03);
            min-width: 0;
        }

        .ac83o-key-action {
            font-size: 15px;
            color: var(--ac83o-text);
            flex: 1;
            padding-right: 16px;
        }

        .ac83o-key-combo {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            justify-content: flex-end;
            min-width: 0;
        }

        kbd {
            background: var(--ac83o-white);
            border: 1px solid var(--ac83o-border);
            border-radius: 6px;
            box-shadow: 0 2px 0 var(--ac83o-border);
            color: var(--ac83o-text);
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            padding: 4px 8px;
            min-width: 32px;
            text-align: center;
        }

        /* AI 助手特色区 */
        .ac83o-ai-section {
            padding: 96px 0;
            background: var(--ac83o-dark);
            color: var(--ac83o-white);
            border-radius: 40px;
            margin: 40px auto;
            max-width: calc(var(--ac83o-container) - 64px);
            position: relative;
            overflow: hidden;
        }

        .ac83o-ai-section::after {
            content: "";
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(212, 45, 45, 0.2) 0%, transparent 70%);
            pointer-events: none;
        }

        .ac83o-ai-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            padding: 0 64px;
        }

        .ac83o-ai-text {
            flex: 1;
            min-width: 300px;
        }

        .ac83o-ai-badge {
            background: linear-gradient(90deg, #FF4D4D, #F9CB28);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 16px;
            display: block;
        }

        .ac83o-ai-title {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 24px;
            line-height: 1.2;
        }

        .ac83o-ai-list {
            list-style: none;
        }

        .ac83o-ai-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            margin-bottom: 24px;
            padding: 20px;
            background: rgba(255,255,255,0.05);
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,0.1);
        }

        .ac83o-ai-item-icon {
            font-size: 24px;
            line-height: 1;
        }

        /* 资讯动态 */
        .ac83o-section-news {
            padding: 96px 0;
        }

        .ac83o-news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .ac83o-news-item {
            background: var(--ac83o-white);
            border-radius: var(--ac83o-radius);
            overflow: hidden;
            border: 1px solid var(--ac83o-border);
            transition: transform 0.3s;
        }

        .ac83o-news-item:hover {
            transform: translateY(-5px);
        }

        .ac83o-news-body {
            padding: 24px;
        }

        .ac83o-news-tag {
            font-size: 12px;
            color: var(--ac83o-primary);
            font-weight: 700;
            margin-bottom: 8px;
            display: block;
        }

        .ac83o-news-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--ac83o-dark);
        }

        /* 页脚 */
        .ac83o-footer {
            background: var(--ac83o-white);
            padding: 80px 0 40px;
            border-top: 1px solid var(--ac83o-border);
        }

        .ac83o-footer-top {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 64px;
        }

        .ac83o-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .ac83o-brand-name {
            font-size: 24px;
            font-weight: 800;
            color: var(--ac83o-primary);
            margin-bottom: 24px;
        }

        .ac83o-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
        }

        .ac83o-footer-col h4 {
            font-size: 16px;
            margin-bottom: 24px;
            color: var(--ac83o-dark);
        }

        .ac83o-footer-col ul {
            list-style: none;
        }

        .ac83o-footer-col li {
            margin-bottom: 12px;
        }

        .ac83o-footer-col a {
            text-decoration: none;
            color: var(--ac83o-text-light);
            font-size: 14px;
            transition: color 0.2s;
        }

        .ac83o-footer-col a:hover {
            color: var(--ac83o-primary);
        }

        .ac83o-footer-bottom {
            border-top: 1px solid var(--ac83o-border);
            padding-top: 32px;
            text-align: center;
            color: var(--ac83o-text-light);
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .ac83o-header { height: auto; padding: 16px 0; }
            .ac83o-menu { order: 2; width: 100%; margin-top: 16px; gap: 12px; }
            .ac83o-hero { padding-top: 120px; text-align: center; }
            .ac83o-hero-content { display: flex; flex-direction: column; align-items: center; }
            .ac83o-ai-content { padding: 0 24px; }
            .ac83o-grid-layout { grid-template-columns: 1fr; }
            .ac83o-ai-section { border-radius: 0; margin: 20px 0; }
        }

        /* 动画增强 */
        .ac83o-fade-up {
            animation: ac83oFadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
        }

        @keyframes ac83oFadeIn {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }