/* 検索・フィルターセクション */
        .filter-section {
            position: relative;
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            margin-top: -50px;
            z-index: 10;
        }

        .search-form {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
        }

        .search-input {
            flex-grow: 1;
            padding: 15px;
            border: 1px solid #cfcfcf;
            border-radius: 8px;
            font-size: 16px;
            font-family: inherit;
            transition: var(--transition);
        }

        .search-input:focus {
            border-color: var(--primary-light);
            outline: none;
            box-shadow: 0 0 0 3px var(--primary-light);
        }

        .search-select {
            padding: 15px;
            border: 1px solid #cfcfcf;
            border-radius: 8px;
            font-size: 16px;
            font-family: inherit;
            background-color: white;
            min-width: 200px;
            transition: var(--transition);
        }

        .search-select:focus {
            border-color: var(--primary-light);
            outline: none;
            box-shadow: 0 0 0 3px var(--primary-light);
        }

        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .search-button:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }

        .tags-wrapper {
            margin-top: 20px;
        }

        .tags-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 15px;
        }

        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag {
            color: var(--text-color);
            padding: 8px 20px;
            border-radius: 30px;
            border: 1px solid var(--gray-color);
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition);
        }

        .tag:hover {
            background-color: var(--primary-light);
            color: var(--primary-color);
            border-color: var(--primary-color);
        }

        .tag.active {
            background-color: var(--primary-color);
            color: white;
        }

        /* 事例カードセクション */
        .case-section-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
        }

        .case-title {
            font-size: 1.8rem;
            font-weight: 700;
        }

        .sort-select {
            padding: 10px 15px;
            border: 1px solid #eee;
            border-radius: 8px;
            font-family: inherit;
            background-color: white;
            transition: var(--transition);
        }

        .sort-select:focus {
            border-color: var(--primary-light);
            outline: none;
            box-shadow: 0 0 0 3px var(--primary-light);
        }

        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background-color: white;
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--box-gray-color);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
            position: relative;
        }

        .case-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--box-shadow-hover);
        }

        .case-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: 1px solid transparent;
            border-radius: 16px;
            box-sizing: border-box;
            transition: var(--transition);
            z-index: 1;
            pointer-events: none;
        }

        .case-card:hover::before {
            border-color: var(--primary-color);
            box-shadow: 0 0 15px rgba(224, 32, 32, 0.2);
            animation: glowPulse 1.5s infinite alternate;
        }

        @keyframes glowPulse {
            0% {
                box-shadow: 0 0 10px rgba(224, 32, 32, 0.2);
            }

            100% {
                box-shadow: 0 0 20px rgba(224, 32, 32, 0.4);
            }
        }

        .case-image {
            height: 220px;
            background-color: #eee;
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }

        .case-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-card:hover .case-image img {
            transform: scale(1.05);
        }

        .case-content {
            padding: 25px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .case-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 15px;
        }

        .case-tag {
            background-color: var(--primary-light);
            color: var(--primary-color);
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
        }

        .case-title-secondary {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 15px;
            line-height: 1.4;
            transition: var(--transition);
        }

        .case-card:hover .case-title-secondary {
            color: var(--primary-color);
        }

        .case-summary {
            color: var(--light-text);
            font-size: 0.95rem;
            margin-bottom: 20px;
            line-height: 1.7;
        }

        .case-company {
            font-size: 0.9rem;
            color: #777;
            margin-bottom: 8px;
            font-weight: 500;
        }

        .case-company i {
            margin-right: 5px;
            color: var(--primary-color);
            font-size: 0.8rem;
        }

        .case-meta {
            margin-top: auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 15px;
            border-top: 1px solid #f0f0f0;
        }

        .case-date {
            font-size: 0.85rem;
            color: #999;
        }

        .case-more {
            color: var(--primary-color);
            font-size: 0.9rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 5px;
            transition: var(--transition);
        }

        .case-more i {
            transition: var(--transition);
        }

        .case-card:hover .case-more i {
            transform: translateX(3px);
        }

        .load-more {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            width: 200px;
            margin: 50px auto 0;
            padding: 15px 0;
            border: 2px solid var(--primary-color);
            border-radius: 50px;
            color: var(--primary-color);
            font-weight: 600;
            transition: var(--transition);
        }

        .load-more:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }


        /* アニメーション */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeInImage {
            from {
                opacity: 0;
                transform: scale(1.02);
            }

            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .animate-fadeInUp {
            opacity: 0;
            animation: fadeInUp 0.6s ease forwards;
        }

        .delay-1 {
            animation-delay: 0.2s;
        }

        .delay-2 {
            animation-delay: 0.4s;
        }

        .delay-3 {
            animation-delay: 0.6s;
        }

        /* レスポンシブ対応 */
        @media (max-width: 1200px) {
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 992px) {
            .about-hero-title {
                font-size: 2.8rem;
            }

            .cta h3 {
                font-size: 2.2rem;
            }

            .cta p {
                font-size: 1.1rem;
            }
        }

        @media (max-width: 768px) {
            .header-container {
                height: 70px;
            }

            .logo-image {
                height: 35px;
            }


            .about-hero-title {
                font-size: 2.2rem;
            }

            .about-hero-subtitle {
                font-size: 1rem;
            }

            .search-form {
                flex-direction: column;
            }

            .case-grid {
                grid-template-columns: 1fr;
            }

            .case-section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 15px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .cta h3 {
                font-size: 1.8rem;
            }

            .cta-button {
                padding: 15px 30px;
                font-size: 1rem;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding: 0 20px;
            }

            .about-hero-title {
                font-size: 1.8rem;
            }

            .filter-section {
                padding: 20px;
            }

            .tag {
                padding: 6px 15px;
            }

            .footer-grid {
                gap: 30px;
            }
        }