@import url("https://fonts.googleapis.com/css?family=Poppins:300,400,500,600,700,900&display=swap");
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            background: #fff;
            font-family: Source Han Sans CN, Microsoft JhengHei, PingFang SC, Source Han Serif SC, Microsoft YaHei, sans-serif;
            line-height: 1.45;
            scroll-behavior: smooth;
        }

        .hero {
            height: 80vh;
            min-height: 600px;
            background: none;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: left;
            text-align: left;
            color: white;
            overflow: hidden;
            isolation: isolate;
        }
        .hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('../images/leiqiguanbg.jpg') center center / cover no-repeat;
            z-index: -2;
            will-change: transform;
            animation: gentleZoom 9s infinite ease-in-out;
            transform-origin: center center;
        }
        @keyframes gentleZoom {
            0% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.08);
            }
            100% {
                transform: scale(1);
            }
        }

        .hero-content h1 {
            color: #fff;
            font-size: 3.5rem;
            font-weight: 800;
        }
        .hero-content p {
            color: #fff;
            font-size: 1.2rem;
            margin-top: 1rem;
        }

        .hero-content {
            left: 6%;
            top: 30%;
            position: relative;
            z-index: 2;
        }
        .hint_box_case {
            margin-left: 0%;
            color: #fff;
            margin-top: 5%;
            position: relative;
            display: flex;
            align-items: center;
            z-index: 2;
        }
        .hint_box_case .hint_box {
            width: 13px;
            height: 21px;
            border: 2px solid #fff;
            border-radius: .5rem;
            position: relative;
            margin-right: .5vw;
            font-size: .14rem;
            line-height: 1;
        }
        .hint_box_case .hint_box span {
            width: 3px;
            height: 5px;
            border-radius: 2px;
            background-color: #fff;
            position: absolute;
            left: 3px;
            top: 2px;
            animation: upd 2s ease infinite;
        }
        @keyframes upd {
            0% {
                transform: none;
            }
            50% {
                transform: translateY(50%);
            }
            100% {
                transform: none;
            }
        }

        /* 主列表容器：纵向排列，无头部无脚注 */
        .cards-list {
            width: 88%;
            margin: 7vw auto;
            display: flex;
            flex-direction: column;
            gap: 5rem;
            padding: 0rem 0rem;
        }

        /* 每一个独立卡片：宽度100%，独立背景图，圆润设计，无右侧图片区域 */
        .card {
            height: 23vw;
            position: relative;
            width: 100%;
            border-radius: 2rem;
            overflow: hidden;
            box-shadow: 0 28px 42px -16px rgba(0, 0, 0, 0.1), 0 6px 14px rgba(0, 0, 0, 0.02);
            transition: transform 0.35s cubic-bezier(0.2, 0.9, 0.4, 1.1), box-shadow 0.3s ease;
            opacity: 0;
            transform: translateY(52px);
            transition: opacity 0.75s cubic-bezier(0.18, 0.89, 0.32, 1.2), transform 0.7s cubic-bezier(0.2, 0.95, 0.3, 1.1);
        }

        .card.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .card:hover {
            transform: translateY(-6px);
            box-shadow: 0 34px 52px -18px rgba(0, 0, 0, 0.55);
        }

        .card-1 {
            background: url('../images/leiqiguan1.jpg') no-repeat;
            background-size: contain;
            background-position: right 30%;
        }
        .card-2 {
            background: url('../images/leiqiguan2.jpg') no-repeat;
            background-size: contain;
            background-position: right 35%;
        }
        .card-3 {
            background: url('../images/leiqiguan3.jpg') no-repeat;
            background-size: contain;
            background-position: right 32%;
        }
        .card-4 {
            background: url('../images/leiqiguan4.jpg') no-repeat;
            background-size: contain;
            background-position: right 42%;
        }

        .card-5 {
            background: url('../images/leiqiguan5.jpg') no-repeat;
            background-size: contain;
            background-position: right 42%;
        }
        .card-6 {
            background: url('../images/leiqiguan6.jpg') no-repeat;
            background-size: contain;
            background-position: right 42%;
        }
        .card-7 {
            background: url('../images/leiqiguan7.jpg') no-repeat;
            background-size: contain;
            background-position: right 42%;
        }

        .card::before {
            content: '';
            position: absolute;
            inset: 0;
            z-index: 0;
            transition: backdrop-filter 0.2s;
        }

        .card-content {
            position: relative;
            z-index: 2;
            padding: 5rem 7rem;
            width: 100%;
        }

        .card-text {
            max-width: 680px;
            color: #fff;
            text-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
            animation: none;
        }

        .card-title {
            font-size: 1.5vw;
            font-weight: 750;
            letter-spacing: -0.02em;
            margin-bottom: 0.9rem;
            line-height: 1.2;
            color: #333;
            text-shadow: none;
        }

        .card-desc {
            font-size: .9vw;
            line-height: 1.55;
            margin-bottom: 5rem;
            color: #666;
            font-weight: normal;
            max-width: 80%;
            text-shadow: none;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(96deg, #096bb3 0%, #16b2aa 97.7%);
            backdrop-filter: blur(4px);
            border: none;
            padding: 1.3rem 3rem;
            border-radius: 3rem;
            font-weight: 620;
            font-size: 0.95vw;
            letter-spacing: 0.3px;
            color: #fff;
            cursor: pointer;
            transition: all 0.28s ease;
            box-shadow: 0 9px 18px -8px rgba(0, 0, 0, 0.3);
            font-family: inherit;
            gap: 6px;
            text-decoration: none;
        }

        .btn:hover {
            background: white;
            transform: translateY(-3px);
            box-shadow: 0 15px 26px -10px rgba(0, 0, 0, 0.4);
            color: #000;
        }

        .btn:active {
            transform: translateY(1px);
            transition: 0.05s;
        }

        /* ===== 响应式：原有PC端保留，下方新增移动端深度适配 ===== */
        /* 原有响应式（保留） */
        @media (max-width: 820px) {
            .cards-list {
                padding: 1.5rem 1.2rem;
                gap: 1.6rem;
            }
            .card-content {
                padding: 2rem 1.8rem;
            }
            .card-title {
                font-size: 2rem;
            }
            .card-desc {
                font-size: 0.95rem;
                max-width: 100%;
                margin-bottom: 1.6rem;
            }
            .btn {
                padding: 0.7rem 1.7rem;
                font-size: 0.88rem;
            }
        }

        @media (max-width: 580px) {
            .card-content {
                padding: 1.6rem 1.4rem;
            }
            .card-title {
                font-size: 1.7rem;
            }
            .card-desc {
                font-size: 0.9rem;
                line-height: 1.45;
            }
            .btn {
                padding: 0.6rem 1.4rem;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 420px) {
            .cards-list {
                padding: 1rem 0.9rem;
            }
            .card-content {
                padding: 1.4rem 1.2rem;
            }
            .card-title {
                font-size: 1.5rem;
            }
        }

        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #181c24;
        }
        ::-webkit-scrollbar-thumb {
            background: #4e566b;
            border-radius: 8px;
        }

        /* ==============================================================
                   移动端深度适配（新增，不修改PC端任何样式）
                   ============================================================== */

        /* 平板 & 大屏手机 (768px ~ 1024px) */
        @media (max-width: 1024px) and (min-width: 769px) {
            .hero-content h1 {
                font-size: 2.8rem;
            }
            .hero-content {
                left: 5%;
                top: 28%;
            }
            .card {
                height: 38vw;
                min-height: 260px;
            }
            .card-content {
                padding: 4rem 4.5rem;
            }
            .card-title {
                font-size: 1.8vw;
            }
            .card-desc {
                font-size: 1.1vw;
                max-width: 70%;
                margin-bottom: 3rem;
            }
            .btn {
                padding: 1rem 2.4rem;
                font-size: 1vw;
            }
            .cards-list {
                gap: 3.5rem;
                width: 92%;
            }
        }

        /* 手机端 (<=768px) */
        @media (max-width: 768px) {
            /* ---- Hero 区域 ---- */
            .hero {
                height: 60vh;
                min-height: 420px;
                align-items: center;
                justify-content: center;
                text-align: center;
            }
            .hero-content {
                left: 0;
                top: 0;
                padding: 0 1.6rem;
                width: 100%;
                text-align: center;
            }
            .hero-content h1 {
                font-size: 2.2rem;
                line-height: 1.3;
                max-width: 100%;
            }
            .hero-content p {
                font-size: 1rem;
                margin-top: 0.6rem;
            }
            .hint_box_case {
                justify-content: center;
                margin-top: 2.2rem;
                font-size: 0.85rem;
            }
            .hint_box_case .hint_box {
                width: 11px;
                height: 18px;
                margin-right: 0.6rem;
            }
            .hint_box_case .hint_box span {
                width: 2.5px;
                height: 4px;
                left: 2.5px;
                top: 2px;
            }
            /* Hero 背景缩放动画调慢，减少性能消耗 */
            .hero::before {
                animation: gentleZoom 12s infinite ease-in-out;
            }

            /* ---- 卡片列表 ---- */
            .cards-list {
                width: 94%;
                margin: 5vw auto;
                gap: 2.2rem;
                padding: 0;
            }

            .card {
                height: auto;
                min-height: 280px;
                border-radius: 1.6rem;
                transform: translateY(36px);
                transition: opacity 0.6s cubic-bezier(0.18, 0.89, 0.32, 1.2), transform 0.55s cubic-bezier(0.2, 0.95, 0.3, 1.1);
                /* 背景图在移动端用 cover 填充，避免 contain 留白 */
                background-size: cover !important;
                background-position: center 30% !important;
            }
            .card:hover {
                transform: translateY(-3px);
                box-shadow: 0 18px 32px -12px rgba(0, 0, 0, 0.4);
            }
            .card.visible {
                transform: translateY(0);
            }

            .card-content {
                padding: 2.2rem 1.8rem 2.6rem;
                width: 100%;
                min-height: 240px;
                display: flex;
                align-items: flex-start;
                justify-content: flex-start;
            }

            .card-text {
                max-width: 100%;
                color: #fff;
                text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
            }

            .card-title {
                font-size: 1.6rem;
                font-weight: 700;
                margin-bottom: 0.6rem;
                color: #fff;
                text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
                letter-spacing: -0.01em;
            }

            .card-desc {
                font-size: 0.92rem;
                line-height: 1.55;
                max-width: 100%;
                margin-bottom: 1.8rem;
                color: rgba(255, 255, 255, 0.92);
                text-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
                display: -webkit-box;
                -webkit-line-clamp: 4;
                -webkit-box-orient: vertical;
                overflow: hidden;
                text-overflow: ellipsis;
            }

            .btn {
                padding: 0.7rem 1.8rem;
                font-size: 0.85rem;
                border-radius: 2.4rem;
                background: linear-gradient(96deg, #096bb3 0%, #16b2aa 97.7%);
                box-shadow: 0 6px 16px -6px rgba(0, 0, 0, 0.35);
                letter-spacing: 0.2px;
            }
            .btn:hover {
                background: white;
                color: #000;
                transform: translateY(-2px);
            }
            .btn:active {
                transform: scale(0.96);
            }

            /* 卡片特殊背景微调：让主体更突出 */
            .card-1,
            .card-2,
            .card-3,
            .card-4,
            .card-5,
            .card-6,
            .card-7 {
                background-position: center 25% !important;
            }
            /* 部分卡片背景偏暗，加一点遮罩提升文字可读性 */
            .card::before {
                background: rgba(0, 0, 0, 0.20);
                backdrop-filter: blur(1px);
            }

            

            
        }

        /* 小屏手机 (<=480px) 进一步精细化 */
        @media (max-width: 480px) {
            .hero {
                height: 52vh;
                min-height: 340px;
            }
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-content p {
                font-size: 0.9rem;
            }
            .hint_box_case {
                font-size: 0.75rem;
                margin-top: 1.8rem;
            }
            .cards-list {
                gap: 1.6rem;
                width: 96%;
                margin: 4vw auto;
            }
            .card {
                min-height: 220px;
                border-radius: 1.2rem;
            }
            .card-content {
                padding: 1.6rem 1.2rem 2rem;
                min-height: 190px;
            }
            .card-title {
                font-size: 1.3rem;
                margin-bottom: 0.4rem;
            }
            .card-desc {
                font-size: 0.8rem;
                line-height: 1.5;
                margin-bottom: 1.2rem;
                -webkit-line-clamp: 3;
            }
            .btn {
                padding: 0.5rem 1.4rem;
                font-size: 0.78rem;
                border-radius: 2rem;
            }
            
        }

        /* 超小屏 (<=375px) */
        @media (max-width: 375px) {
            .hero {
                height: 46vh;
                min-height: 280px;
            }
            .hero-content h1 {
                font-size: 1.5rem;
            }
            .card {
                min-height: 190px;
            }
            .card-content {
                padding: 1.2rem 1rem 1.6rem;
                min-height: 160px;
            }
            .card-title {
                font-size: 1.1rem;
            }
            .card-desc {
                font-size: 0.72rem;
                margin-bottom: 0.8rem;
            }
            .btn {
                padding: 0.4rem 1.2rem;
                font-size: 0.7rem;
            }
            .cards-list {
                gap: 1.2rem;
            }
        }

      

        /* 横屏手机提醒：保持可读性 */
        @media (max-height: 500px) and (orientation: landscape) {
            .hero {
                height: 90vh;
                min-height: 300px;
            }
            .hero-content h1 {
                font-size: 1.8rem;
            }
            .cards-list {
                gap: 1.6rem;
            }
            .card {
                min-height: 180px;
            }
            .card-content {
                padding: 1.2rem 1.6rem;
                min-height: 150px;
            }
            .card-title {
                font-size: 1.2rem;
            }
            .card-desc {
                font-size: 0.78rem;
                margin-bottom: 0.8rem;
                -webkit-line-clamp: 2;
            }
            .btn {
                padding: 0.4rem 1.2rem;
                font-size: 0.7rem;
            }
        }