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

        body {
            font-family: 'Inter', sans-serif;
            background: #FFF9F2;  /* 统一暖白基调 */
            color: #2E2A28;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        /* 统一主色调：落日暖橙 #F15A24 / 陶土色辅助 */
        :root {
            --primary: #F15A24;
            --primary-dark: #D9461A;
            --primary-soft: #FFE5D6;
            --secondary: #2C2A29;
            --gray-bg: #FDF5EC;
            --card-white: #FFFFFF;
            --shadow-sm: 0 20px 35px -12px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.02);
            --shadow-hover: 0 30px 45px -15px rgba(241,90,36,0.15), 0 4px 12px rgba(0,0,0,0.05);
            --border-radius: 2rem;
            --border-radius-card: 1.5rem;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* 导航栏 玻璃态+创意底纹 */
        #navbar {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            padding: 1rem 0;
            transition: all 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            background: transparent;
        }
        #navbar.scrolled {
            background: rgba(255, 249, 242, 0.92);
            backdrop-filter: blur(12px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.03);
            padding: 0.6rem 0;
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 1.3rem;
            letter-spacing: -0.3px;
            background: linear-gradient(135deg, #F15A24, #C73C12);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }
        .nav-logo-icon {
            background: var(--primary);
            width: 32px;
            height: 32px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 12px -4px rgba(241,90,36,0.3);
        }
        .nav-logo-icon svg {
            width: 18px;
            height: 18px;
            stroke: white;
        }
        .nav-links {
            display: flex;
            gap: 2.5rem;
            list-style: none;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #4A3F3A;
            transition: 0.2s;
            font-size: 0.95rem;
        }
        .nav-links a:hover { color: var(--primary); }
        .nav-cta {
            background: var(--primary);
            color: white;
            padding: 0.5rem 1.4rem;
            border-radius: 60px;
            font-weight: 600;
            text-decoration: none;
            font-size: 0.85rem;
            transition: all 0.2s;
            box-shadow: 0 2px 6px rgba(241,90,36,0.2);
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            transform: scale(0.97);
        }

        /* Hero 创意非对称布局 + 波浪装饰 */
        .hero {
            position: relative;
            padding: 8rem 0 5rem;
            overflow: hidden;
            background: radial-gradient(circle at 80% 20%, rgba(241,90,36,0.03), transparent 70%);
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #FFEDE3;
            padding: 0.3rem 1rem;
            border-radius: 60px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--primary-dark);
            margin-bottom: 1.5rem;
        }
        .dot {
            width: 8px;
            height: 8px;
            background: var(--primary);
            border-radius: 50%;
            display: inline-block;
        }
        h1 {
            font-family: 'DM Serif Display', serif;
            font-size: 3.5rem;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 1.5rem;
            color: #221F1D;
        }
        h1 em {
            color: var(--primary);
            font-style: normal;
            border-bottom: 3px solid rgba(241,90,36,0.3);
        }
        .hero-desc {
            font-size: 1rem;
            color: #5A4E47;
            margin-bottom: 2rem;
            max-width: 90%;
        }
        .hero-actions {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin-bottom: 1.8rem;
        }
        .btn-primary {
            background: var(--primary);
            color: white;
            padding: 0.9rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all 0.25s;
            box-shadow: 0 8px 18px rgba(241,90,36,0.25);
        }
        .btn-primary:hover {
            background: #D63E12;
            transform: translateY(-3px);
        }
        .btn-secondary {
            background: transparent;
            border: 1.5px solid #E5D5CA;
            padding: 0.9rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 500;
            color: #3D332E;
            transition: 0.2s;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .hero-meta {
            font-size: 0.8rem;
            color: #9B8A7C;
            display: flex;
            gap: 0.5rem;
        }
        /* 右侧创意窗口 */
        .hero-visual {
            position: relative;
        }
        .hero-window {
            background: #FFFFFF;
            border-radius: 2rem;
            box-shadow: var(--shadow-sm), 0 20px 30px -12px rgba(0,0,0,0.1);
            overflow: hidden;
            border: 1px solid #F7EADE;
            backdrop-filter: blur(2px);
        }
        .window-bar {
            background: #FEF5EC;
            padding: 0.9rem 1.2rem;
            display: flex;
            align-items: center;
            gap: 8px;
            border-bottom: 1px solid #F1E1D4;
        }
        .window-dot { width: 12px; height: 12px; border-radius: 50%; }
        .r { background: #FF5F56; }
        .y { background: #FFBD2E; }
        .g { background: #27C93F; }
        .window-title {
            margin-left: 12px;
            font-size: 0.7rem;
            color: #B58A6C;
            font-weight: 500;
        }
        .window-body {
            padding: 1.5rem;
        }
        .translate-row {
            display: flex;
            gap: 1rem;
            align-items: center;
            margin-bottom: 1.2rem;
        }
        .lang-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            font-weight: 600;
            color: #F15A24;
            letter-spacing: 0.5px;
        }
        .lang-text {
            background: #FEF9F4;
            padding: 0.7rem;
            border-radius: 1rem;
            font-size: 0.85rem;
            margin-top: 6px;
            border: 1px solid #FCE8DC;
        }
        .target { background: #FFF2E9; }
        .swap-btn {
            background: none;
            border: none;
            cursor: pointer;
            color: #F15A24;
        }
        .dict-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 1rem 0;
        }
        .dict-tag {
            background: #F1E8DF;
            padding: 0.3rem 0.8rem;
            border-radius: 40px;
            font-size: 0.7rem;
            font-weight: 500;
        }
        .floating-label {
            position: absolute;
            background: rgba(255,255,240,0.9);
            backdrop-filter: blur(8px);
            padding: 0.4rem 1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            box-shadow: 0 8px 15px rgba(0,0,0,0.05);
            border: 1px solid #FFDCC8;
            pointer-events: none;
        }
        .fl1 { top: -10px; left: -30px; }
        .fl2 { bottom: 50px; right: -20px; }
        .fl3 { top: 30%; right: -15px; background: #F15A24; color: white; border: none; }
        .word-graph {
            background: #FEF4EA;
            border-radius: 1.2rem;
            padding: 1rem;
            margin-top: 1rem;
        }
        .graph-nodes { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
        .graph-node {
            background: white;
            padding: 0.2rem 1rem;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 500;
            box-shadow: 0 1px 2px rgba(0,0,0,0.05);
        }

        /* stats-bar 创意卡片 */
        .stats-bar {
            background: linear-gradient(135deg, #FEF5EA, #FFF9F2);
            padding: 2rem 0;
            border-top: 1px solid #FBE6D8;
            border-bottom: 1px solid #FBE6D8;
        }
        .stats-grid {
            display: flex;
            justify-content: space-between;
            text-align: center;
            gap: 2rem;
            flex-wrap: wrap;
        }
        .stat-num { font-size: 2.8rem; font-weight: 800; color: var(--primary); font-family: 'DM Serif Display', serif; }
        .unit { font-size: 1.2rem; }
        .stat-label { color: #5C4C42; font-weight: 500; margin-top: 0.3rem; }

        /* 通用section */
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-tag {
            display: inline-block;
            background: #FDE9DF;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 1rem;
        }
        .section-title {
            font-size: 2.2rem;
            font-family: 'DM Serif Display', serif;
            color: #2A241F;
        }
        .section-title em { color: var(--primary); font-style: normal; }

        /* 产品网格错落创意 */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
            gap: 2rem;
            margin-bottom: 4rem;
        }
        .product-card {
            background: var(--card-white);
            border-radius: 2rem;
            padding: 1.8rem;
            transition: 0.2s;
            border: 1px solid #F7E5DA;
            box-shadow: var(--shadow-sm);
        }
        .product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .product-icon { font-size: 2rem; color: var(--primary); margin-bottom: 1rem; }
        .badge-new {
            display: inline-block;
            background: #FFE2D3;
            color: #B54A1C;
            font-size: 0.6rem;
            border-radius: 40px;
            padding: 0.2rem 0.8rem;
            margin-top: 0.8rem;
        }

        /* 时间轴创意版本日志 */
        .changelog-section {
            background: #FEF9F2;
            border-radius: 2rem;
            padding: 2rem;
            margin-top: 1rem;
            border: 1px solid #FFEADB;
        }
        .version-timeline {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .version-entry {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: baseline;
            border-bottom: 1px dashed #FFDDCC;
            padding-bottom: 0.8rem;
        }
        .version-badge {
            background: var(--primary);
            color: white;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.7rem;
            min-width: 100px;
            text-align: center;
        }
        .version-content {
            flex: 1;
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            align-items: center;
        }
        .version-feature {
            background: #FFF0E6;
            padding: 0.2rem 0.7rem;
            border-radius: 30px;
            font-size: 0.7rem;
            font-weight: 500;
        }

        /* 词典卡片 */
        .dict-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 2rem;
        }
        .dict-card {
            background: white;
            border-radius: 1.8rem;
            padding: 1.5rem;
            display: flex;
            gap: 1rem;
            align-items: center;
            box-shadow: var(--shadow-sm);
            transition: 0.2s;
        }
        .dict-cover { font-size: 2.8rem; }
        .dict-meta { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }

        /* 交错展示区 */
        .feature-showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            margin: 4rem 0;
            align-items: center;
        }
        .app-mock {
            border-radius: 2rem;
            padding: 1.5rem;
            background: #2D2926;
            color: #eee;
        }
        .feature-list-modern {
            list-style: none;
        }
        .feature-list-modern li {
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .feature-list-modern i { color: var(--primary); width: 1.8rem; font-size: 1.2rem; }

        /* 附加四卡片 */
        .additional-features {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.8rem;
            margin: 3rem 0;
        }
        .feature-box {
            background: white;
            border-radius: 1.8rem;
            padding: 1.5rem;
            transition: all 0.2s;
            border: 1px solid #F6E2D4;
        }
        @media (max-width: 800px) {
            .additional-features { grid-template-columns: 1fr 1fr; }
            .hero-grid { grid-template-columns: 1fr; }
            .feature-showcase { grid-template-columns: 1fr; }
        }

        /* steps 三步 */
        .steps {
            display: flex;
            gap: 2rem;
            justify-content: space-between;
            margin: 2rem 0;
            flex-wrap: wrap;
        }
        .step {
            flex: 1;
            background: #FFF9F2;
            border-radius: 1.5rem;
            padding: 2rem 1rem;
            text-align: center;
            border: 1px solid #FFE6D9;
        }
        .step-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.4;
            font-family: monospace;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: white;
            border-radius: 1.5rem;
            margin-bottom: 1rem;
            overflow: hidden;
            border: 1px solid #F2DFD1;
        }
        .faq-q {
            padding: 1.2rem 1.5rem;
            display: flex;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
        }
        .faq-a {
            padding: 0 1.5rem 1.2rem 1.5rem;
            display: none;
            color: #5F534B;
            border-top: 1px solid #F4E2D6;
        }
        .faq-item.open .faq-a { display: block; }
        .faq-item.open .arrow { transform: rotate(180deg); }

        /* CTA */
        .download-cta {
            background: linear-gradient(115deg, #FDF2E6, #FFFBF5);
            text-align: center;
            padding: 3rem 0;
            border-radius: 3rem;
            margin: 3rem 0;
            border: 1px solid #FCE3D2;
        }
        .btn-large {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: var(--primary);
            color: white;
            padding: 1rem 2.5rem;
            border-radius: 60px;
            text-decoration: none;
            font-weight: 700;
            margin: 0 0.5rem;
        }
        .btn-large.secondary {
            background: transparent;
            color: #2C2A29;
            border: 2px solid #EADBCE;
        }
        .os-links {
            display: flex;
            justify-content: center;
            gap: 1.2rem;
            margin-top: 1.8rem;
            flex-wrap: wrap;
        }
        .os-link {
            color: #A2745A;
            text-decoration: none;
            font-size: 0.8rem;
        }

        footer {
            background: #231F1C;
            color: #CBB9AB;
            padding: 2rem 0;
            border-radius: 2rem 2rem 0 0;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
        }
        .footer-brand p { font-size: 0.8rem; margin-top: 0.5rem; }
        .footer-col h5 { color: white; margin-bottom: 1rem; }
        .footer-col ul { list-style: none; }
        .footer-col a { color: #CBB9AB; text-decoration: none; font-size: 0.8rem; }
        .footer-bottom {
            margin-top: 2rem;
            text-align: center;
            font-size: 0.7rem;
            border-top: 1px solid #3C332D;
            padding-top: 1.5rem;
        }
        .fade-in { opacity: 0; transform: translateY(15px); transition: opacity 0.5s ease, transform 0.5s; }
        .fade-in.visible { opacity: 1; transform: translateY(0); }
        @media (max-width: 760px) {
            .nav-links { display: none; }
            .footer-grid { grid-template-columns: 1fr; }
            .container { padding: 0 1.2rem; }
            h1 { font-size: 2.5rem; }
        }