.guide_container {
        max-width: 900px;
        margin: 0 auto;
        padding: 40px 20px;
        margin-top: 80px;
    }

    .guide_title {
        font-size: 42px;
        font-weight: 700;
        color: #2c3e50;
        text-align: center;
        margin-bottom: 60px;
        position: relative;
        padding-bottom: 20px;
    }

    .guide_title:after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 60px;
        height: 3px;
        background: linear-gradient(to right, #3498db, #2980b9);
        border-radius: 2px;
    }

    .header_wrap {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: #fff;
    }

    .tools_title {
        display: none;
    }

    .category_section {
        margin-bottom: 60px;
    }

    .category_title {
        font-size: 28px;
        font-weight: 700;
        color: #2c3e50;
        margin-bottom: 30px;
        text-align: center;
        position: relative;
        padding-bottom: 15px;
    }

    .category_title:after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 60px;
        height: 3px;
        background: linear-gradient(to right, #4834d4, #372aaa);
        border-radius: 2px;
    }

    .category_section:nth-of-type(2) .category_title:after {
        background: linear-gradient(to right, #2ecc71, #27ae60);
    }

    .category_section:nth-of-type(3) .category_title:after {
        background: linear-gradient(to right, #e67e22, #d35400);
    }

    .category_section:nth-of-type(4) .category_title:after {
        background: linear-gradient(to right, #9b59b6, #8e44ad);
    }

    .api_cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 30px;
        justify-items: center;
    }

    .api_card {
        background: #fff;
        border-radius: 20px;
        padding: 40px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        transition: all 0.3s ease;
        width: 100%;
        max-width: 400px;
        border: 1px solid rgba(0,0,0,0.05);
    }

    .api_card:hover {
        transform: translateY(-5px);
        box-shadow: 0 15px 40px rgba(0,0,0,0.15);
    }

    .card_icon {
        width: 80px;
        height: 80px;
        border-radius: 20px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 25px;
        position: relative;
        overflow: hidden;
    }

    .card_icon:before {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        background: currentColor;
        opacity: 0.1;
    }

    .card_icon i {
        font-size: 36px;
        position: relative;
        z-index: 1;
    }

    /* 에디터 섹션 */
    .editor_cards .category_title:after {
        background: linear-gradient(to right, #4834d4, #372aaa);
    }

    .card_icon.editor {
        color: #4834d4;
    }
    .editor_btn {
        background: #4834d4;
    }
    .editor_btn:hover {
        background: #372aaa;
    }

    /* 파일 전송 섹션 */
    .transfer_cards .category_title:after {
        background: linear-gradient(to right, #2ecc71, #27ae60);
    }

    .card_icon.transfer {
        color: #2ecc71;
    }
    .transfer_btn {
        background: #2ecc71;
    }
    .transfer_btn:hover {
        background: #27ae60;
    }

    /* 원격 접속 섹션 */
    .remote_cards .category_title:after {
        background: linear-gradient(to right, #e67e22, #d35400);
    }

    .card_icon.remote {
        color: #e67e22;
    }
    .remote_btn {
        background: #e67e22;
    }
    .remote_btn:hover {
        background: #d35400;
    }

    /* AI API 섹션 */
    .ai_cards .category_title:after {
        background: linear-gradient(to right, #9b59b6, #8e44ad);
    }

    .card_icon.ai {
        color: #9b59b6;
    }
    .ai_btn {
        background: #9b59b6;
    }
    .ai_btn:hover {
        background: #8e44ad;
    }

    .api_card h2 {
        font-size: 24px;
        font-weight: 700;
        color: #1a1a1a;
        margin-bottom: 15px;
        line-height: 1.4;
    }

    .api_card p {
        font-size: 16px;
        color: #666;
        line-height: 1.6;
        margin-bottom: 25px;
    }

    .card_features {
        list-style: none;
        padding: 0;
        margin-bottom: 30px;
    }

    .card_features li {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 15px;
        color: #555;
        margin-bottom: 12px;
    }

    .card_features i {
        font-size: 14px;
    }

    .card_button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        width: 100%;
        color: #fff;
        padding: 15px 30px;
        border-radius: 12px;
        text-decoration: none;
        font-weight: 600;
        font-size: 16px;
        transition: all 0.3s ease;
    }

    @media (max-width: 768px) {
        .guide_container {
            margin-top: 120px;
            padding: 20px;
        }

        .guide_title {
            font-size: 32px;
            margin-bottom: 40px;
        }

        .category_title {
            font-size: 24px;
            margin-bottom: 25px;
        }

        .api_cards {
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .api_card {
            padding: 30px;
            max-width: 100%;
        }

        .card_icon {
            width: 60px;
            height: 60px;
        }

        .card_icon i {
            font-size: 28px;
        }
    }

    @media (max-width: 480px) {
        .guide_title {
            font-size: 28px;
        }

        .category_title {
            font-size: 22px;
        }

        .api_card h2 {
            font-size: 20px;
        }

        .api_card p {
            font-size: 15px;
        }

        .card_features li {
            font-size: 14px;
        }

        .card_button {
            font-size: 15px;
            padding: 12px 20px;
        }
    }