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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: #f6f9fc;
            color: #1e293b;
            line-height: 1.6;
            padding-top: 70px;
         
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        ul {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航栏 ===== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 70px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
            display: flex;
            align-items: center;
            z-index: 1000;
            transition: box-shadow 0.3s;
            border-bottom: 1px solid rgba(37, 99, 235, 0.08);
        }

        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: #2563eb;
            letter-spacing: -0.5px;
        }

        .nav-logo i {
            font-size: 28px;
            color: #2563eb;
        }

        .nav-logo span {
            color: #1e293b;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-links a {
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 500;
            color: #475569;
            transition: all 0.25s;
            cursor: pointer;
            position: relative;
        }

        .nav-links a:hover {
            color: #2563eb;
            background: rgba(37, 99, 235, 0.08);
        }

        .nav-links a.active {
            color: #ffffff;
            background: #2563eb;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        .nav-links a.active:hover {
            background: #1d4ed8;
            color: #fff;
        }

        /* 移动端汉堡菜单 */
        .nav-toggle {
            display: none;
            font-size: 26px;
            color: #1e293b;
            cursor: pointer;
            background: none;
            border: none;
            padding: 4px 8px;
        }

        /* ===== 页面容器 ===== */
        .page {
            display: none;
            animation: fadeUp 0.5s ease forwards;
            padding: 40px 0 60px;
        }

        .page.active {
            display: block;
        }

        @keyframes fadeUp {
            0% {
                opacity: 0;
                transform: translateY(18px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== 通用标题 ===== */
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-title h2 {
            font-size: 34px;
            font-weight: 700;
            color: #0f172a;
            letter-spacing: -0.5px;
        }

        .section-title p {
            font-size: 18px;
            color: #64748b;
            margin-top: 10px;
        }

        .section-title .highlight {
            color: #2563eb;
        }

        /* ===== 首页 ===== */
        /* Hero */
        .hero {
            text-align: center;
            padding: 20px 0 50px;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(37, 99, 235, 0.10);
            color: #2563eb;
            font-size: 14px;
            font-weight: 600;
            padding: 6px 20px;
            border-radius: 30px;
            margin-bottom: 24px;
            letter-spacing: 0.3px;
        }

        .hero-badge i {
            margin-right: 6px;
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: #0f172a;
            letter-spacing: -1px;
            line-height: 1.2;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p.sub {
            font-size: 20px;
            color: #475569;
            max-width: 600px;
            margin: 16px auto 32px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 40px;
            font-size: 17px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s;
        }

        .btn-primary {
            background: #2563eb;
            color: #fff;
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.30);
        }

        .btn-primary:hover {
            background: #1d4ed8;
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(37, 99, 235, 0.35);
        }

        .btn-outline {
            background: transparent;
            color: #1e293b;
            border: 2px solid #e2e8f0;
        }

        .btn-outline:hover {
            border-color: #2563eb;
            color: #2563eb;
            background: rgba(37, 99, 235, 0.04);
        }

        .btn-sm {
            padding: 10px 24px;
            font-size: 15px;
        }

        /* 特点卡片 */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 20px;
        }

        .feature-card {
            background: #ffffff;
            border-radius: 20px;
            padding: 32px 28px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: all 0.3s;
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
            border-color: rgba(37, 99, 235, 0.15);
        }

        .feature-card .icon-wrap {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.08);
            color: #2563eb;
            font-size: 32px;
            margin-bottom: 20px;
            transition: 0.3s;
        }

        .feature-card:hover .icon-wrap {
            background: #2563eb;
            color: #fff;
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #0f172a;
        }

        .feature-card p {
            color: #64748b;
            font-size: 15px;
        }

        /* ===== 功能页 ===== */
        .func-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .func-item {
            background: #ffffff;
            border-radius: 16px;
            padding: 28px 20px;
            text-align: center;
            border: 1px solid #f1f5f9;
            transition: all 0.3s;
        }

        .func-item:hover {
            border-color: #2563eb;
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.08);
            transform: translateY(-4px);
        }

        .func-item i {
            font-size: 34px;
            color: #2563eb;
            margin-bottom: 14px;
            display: block;
        }

        .func-item h4 {
            font-size: 17px;
            font-weight: 600;
            color: #0f172a;
            margin-bottom: 6px;
        }

        .func-item p {
            font-size: 14px;
            color: #64748b;
            margin: 0;
        }

        /* ===== 截图页 ===== */
        .screenshot-showcase {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 10px 0;
        }

        .mockup {
            background: #ffffff;
            border-radius: 24px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.10);
            border: 1px solid rgba(0, 0, 0, 0.04);
            overflow: hidden;
            width: 100%;
            max-width: 900px;
            transition: 0.3s;
        }

        .mockup-header {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 16px 24px;
            background: #f8fafc;
            border-bottom: 1px solid #eef2f6;
        }

        .mockup-header .dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            display: inline-block;
        }

        .mockup-header .dot.red {
            background: #ef4444;
        }
        .mockup-header .dot.yellow {
            background: #f59e0b;
        }
        .mockup-header .dot.green {
            background: #22c55e;
        }

        .mockup-header .title-bar {
            flex: 1;
            text-align: center;
            font-size: 14px;
            color: #94a3b8;
            font-weight: 500;
        }

        .mockup-body {
            padding: 28px 30px 30px;
            background: #ffffff;
        }

        .mockup-toolbar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            margin-bottom: 24px;
        }

        .mockup-toolbar .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: #f1f5f9;
            padding: 8px 16px;
            border-radius: 30px;
            color: #94a3b8;
            font-size: 14px;
            flex: 1 1 200px;
        }

        .mockup-toolbar .search-box i {
            color: #94a3b8;
        }

        .mockup-toolbar .actions {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .mockup-toolbar .actions .btn-mock {
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            border: none;
            background: #f1f5f9;
            color: #1e293b;
            cursor: default;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .mockup-toolbar .actions .btn-mock.primary {
            background: #2563eb;
            color: #fff;
        }

        .mockup-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
        }

        .mockup-table th {
            text-align: left;
            padding: 12px 10px;
            font-weight: 600;
            color: #475569;
            border-bottom: 2px solid #eef2f6;
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 0.4px;
        }

        .mockup-table td {
            padding: 12px 10px;
            border-bottom: 1px solid #f1f5f9;
            color: #1e293b;
        }

        .mockup-table .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
        }

        .mockup-table .tag.income {
            background: #dcfce7;
            color: #16a34a;
        }

        .mockup-table .tag.expense {
            background: #fee2e2;
            color: #dc2626;
        }

        .mockup-table .tag.food {
            background: #fef3c7;
            color: #d97706;
        }

        .mockup-table .tag.shopping {
            background: #e0e7ff;
            color: #4f46e5;
        }

        .mockup-table .amount {
            font-weight: 600;
        }

        .mockup-table .amount.income {
            color: #16a34a;
        }
        .mockup-table .amount.expense {
            color: #dc2626;
        }

        .mockup-footer {
            margin-top: 18px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
            color: #94a3b8;
            padding-top: 12px;
            border-top: 1px solid #f1f5f9;
        }

        /* ===== 下载页 ===== */
        .download-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .download-box {
            background: #ffffff;
            border-radius: 20px;
            padding: 40px 36px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }

        .download-box h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #0f172a;
        }

        .download-box p {
            color: #64748b;
            margin-bottom: 20px;
        }

        .download-box .file-info {
            display: flex;
            align-items: center;
            gap: 14px;
            background: #f8fafc;
            padding: 14px 20px;
            border-radius: 14px;
            margin-bottom: 24px;
            border: 1px solid #eef2f6;
        }

        .download-box .file-info i {
            font-size: 28px;
            color: #2563eb;
        }

        .download-box .file-info .details {
            display: flex;
            flex-direction: column;
        }

        .download-box .file-info .details .name {
            font-weight: 600;
            color: #0f172a;
        }

        .download-box .file-info .details .meta {
            font-size: 13px;
            color: #94a3b8;
        }

        .download-box .btn-download {
            width: 100%;
            justify-content: center;
            padding: 16px;
            font-size: 18px;
        }

        .download-box .btn-download i {
            font-size: 20px;
        }

        .feature-list {
            margin-top: 10px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 10px 0;
            border-bottom: 1px solid #f1f5f9;
            color: #334155;
            font-size: 15px;
        }

        .feature-list li:last-child {
            border-bottom: none;
        }

        .feature-list li i {
            color: #2563eb;
            font-size: 18px;
            margin-top: 2px;
            min-width: 22px;
        }

        .feature-list li strong {
            color: #0f172a;
        }

        .steps-box {
            background: #ffffff;
            border-radius: 20px;
            padding: 40px 36px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }

        .steps-box h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 24px;
            color: #0f172a;
        }

        .step-item {
            display: flex;
            gap: 18px;
            padding: 14px 0;
            border-bottom: 1px solid #f1f5f9;
            align-items: flex-start;
        }

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

        .step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.10);
            color: #2563eb;
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
        }

        .step-item .step-content h4 {
            font-weight: 600;
            color: #0f172a;
            font-size: 16px;
        }

        .step-item .step-content p {
            color: #64748b;
            font-size: 14px;
            margin-top: 2px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #ffffff;
            border-top: 1px solid #eef2f6;
            padding: 28px 0;
            text-align: center;
            color: #94a3b8;
            font-size: 14px;
            margin-top: 20px;
        }

        .footer .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer .social {
            display: flex;
            gap: 16px;
        }

        .footer .social a {
            color: #94a3b8;
            font-size: 18px;
            transition: 0.25s;
        }

        .footer .social a:hover {
            color: #2563eb;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .func-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .download-wrapper {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            body {
                padding-top: 64px;
            }

            .navbar {
                height: 64px;
            }

            .nav-toggle {
                display: block;
            }

            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                padding: 16px 24px 24px;
                border-bottom: 1px solid #eef2f6;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
                gap: 4px;
            }

            .nav-links.open {
                display: flex;
            }

            .nav-links a {
                padding: 12px 16px;
                border-radius: 12px;
                width: 100%;
                text-align: center;
            }

            .nav-links a.active {
                background: #2563eb;
                color: #fff;
            }

            .hero h1 {
                font-size: 34px;
            }

            .hero p.sub {
                font-size: 17px;
                padding: 0 10px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .func-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .section-title h2 {
                font-size: 28px;
            }

            .mockup-body {
                padding: 16px;
                overflow-x: auto;
            }

            .mockup-toolbar {
                flex-direction: column;
                align-items: stretch;
            }

            .mockup-table {
                font-size: 13px;
                min-width: 560px;
            }

            .mockup-table th,
            .mockup-table td {
                padding: 8px 6px;
            }

            .download-box,
            .steps-box {
                padding: 28px 20px;
            }

            .footer .container {
                flex-direction: column;
                text-align: center;
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .func-grid {
                grid-template-columns: 1fr;
            }

            .hero h1 {
                font-size: 28px;
            }

            .nav-logo {
                font-size: 18px;
            }

            .nav-logo i {
                font-size: 22px;
            }
        }