/* section-1 */
.section-1 {
    padding: 3rem 0;
    width: 100%;
    height: 90vh;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.9) 16%, rgba(30, 100, 140, 0.2)), url(../../imgs/miimu_ceramic_coil_for_vaping_device.webp);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    color: #fff;
}

.section-1 .container {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.section-1 .content-txt {
    width: 80%;
    max-width: 50rem;
    margin: 0 auto;
    letter-spacing: 2px;
    text-align: center;
}

.section-1 .content-txt .title-bg {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
}

.section-1 .content-txt .title-en {
    color: #ccc;
    font-size: clamp(1.05rem, 2.5vw, 1.25rem);
    font-weight: 300;
    margin: 0rem 0 2rem 0;
}

.section-1 .content-txt .subtitle {
    color: #ddd;
    font-size: clamp(1.05rem, 2.5vw, 1.25rem);
    margin-bottom: 0rem;
}
.section-1 .content-txt .highlight {
    font-weight: 400;
}
.section-1 .research-data {
    display: flex;
    flex-wrap: nowrap;
    gap: 3rem;
    align-items: center;
    justify-content: center;
}

.section-1 .research-data .card {
    flex: 0 1 calc(25% - 2rem);
    background: rgba(30, 100, 140, 0.3);
    border-radius: 1rem;
    overflow: hidden;
    padding: 2.5rem 2rem;
    text-align: center;
}

.section-1 .research-data .card .card-num {
    position: relative;
    display: inline-block;
    z-index: 1;
}

.section-1 .research-data .card .card-num .value-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: auto;
    height: 30%;
    padding: 0 5rem;
    border-radius: 10px;
    background-color: rgba(51, 189, 189, 0.4);
    z-index: -1;
}

.section-1 .research-data .card .card-num .num {
    display: flex;
    align-items: center;
    font-family: var(--font-montserrat);
    font-size: clamp(2rem, 3.5vw, 3rem);
    font-weight: 900;
    z-index: 2;
}

.section-1 .research-data .card .card-num .num i {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    font-style: normal;
}

.section-1 .research-data .card .card-item {
    margin-top: 1rem;
    font-weight: 400;
}

/* section-2 */
.section-2 {
    padding: 5rem 0;
}

.section-2 .container {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    height: 100%;
}
.section-2 .container .content-txt{
    width: 80%;
    max-width: 50rem;
    margin: 0 auto;
    letter-spacing: 2px;
    text-align: center;
}
.section-2 .container .content-txt .title-bg{
    font-size: clamp(1.5rem, 3.5vw, 2rem);
}
.section-2 .container .content-txt .title-en{
    color: #ccc;
    font-size: clamp(1.05rem, 2.5vw, 1.25rem);
    font-weight: 300;
}

.section-2 .research-tech {
    padding-top: 3rem;
}

.section-2 .research-tech .title {
    text-align: center;
    font-size: clamp(1.1rem, 3vw, 1.5rem);
}

.section-2 .research-tech .flip {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 1rem;
    text-align: center;
}

.section-2 .research-tech .flip .flip-item {
    flex: 0 1;
    cursor: pointer;
}

.section-2 .research-tech .flip .flip-item:hover .flipper {
    transform: rotateY(180deg);
}

.section-2 .research-tech .flip .flip-item .flipper {
    position: relative;
    aspect-ratio: 0.86;
    min-height: 15rem;
    border-radius: 1rem;
    transform-style: preserve-3d;
    transition: transform 0.6s;
}

.section-2 .research-tech .flip .flip-item .flipper .front {
    background-color: rgba(30, 100, 140, 0.2);
    border-radius: 1rem;
}

.section-2 .research-tech .flip .flip-item .flipper .back {
    border-radius: 1rem;
    transform: rotateY(180deg);
}

.section-2 .research-tech .flip .flip-item .flipper .front,
.section-2 .research-tech .flip .flip-item .flipper .back {
    position: absolute;
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    backface-visibility: hidden;
    overflow: hidden;
}

.section-2 .research-tech .flip .flip-item .flipper img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.section-2 .research-tech .flip .flip-item .flipper h4 {
    position: absolute;
    width: 100%;
    bottom: 1rem;
    left: 0;
    color: #ccc;
    font-weight: 400;
    font-size: 1rem;
}

.section-2 .research-tech .flip .flip-item .flipper .back h4 {
    bottom: 0;
    background-color: rgba(51, 189, 189, 0.4);
    padding: 2px 3px;
    color: #000;
}

/* sectoin-3 */
.section-3 {
    position: relative;
    padding: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.1) 16%, rgba(0, 0, 0, 0) 35%, transparent, rgba(30, 100, 158, 0.5) 75%, rgba(1, 39, 58, 1) 100%), url(../../imgs/section1_bg.webp);
    background-repeat: no-repeat;
    background-size: cover;
    height: 90vh;
    overflow: hidden;
}

.section-3 .container {
    position: relative;
    height: 100%;
}

.section-3 .container .content-txt {
    position: absolute;
    bottom: 15%;
    left: 50%;
    transform: translate(-50%, 50%);
    z-index: 3;
}

.section-3 .container .content-txt .title-en {
    margin: 1rem 0;
}

.section-3 .container .miimu-logo {
    position: absolute;
    width: 100%;
    max-width: unset;
    top: 37%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: .7;
    z-index: 1;
}

.section-3 .container .ceramic-coil {
    position: absolute;
    width: 50%;
    max-width: unset;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.8;
    z-index: 2;
}

.section-3 .bullet-box {
    position: absolute;
    bottom: 5%;
    left: 0;
    width: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    row-gap: 15px;
}

.section-3 .bullet-box .marquee-row {
    position: relative;
    width: 100%;
    overflow: hidden;
    height: 2rem;
}

.section-3 .bullet-box .marquee-track {
    position: absolute;
    display: flex;
    align-items: center;
    white-space: nowrap;
    will-change: transform;
}

.section-3 .bullet-box .marquee-track .bullet {
    color: #eee;
    background: #84cfcf50;
    border-radius: 3rem;
    padding: 0.25rem 1rem;
    font-size: 1rem;
    flex-shrink: 0;
}

/* 鼠标悬停：暂停跑马灯 */
.section-3 .bullet-box:hover .marquee-track {
    animation-play-state: paused;
}

/* section-4: 核心数据 */
.section-4 {
    padding: 5rem 0 2rem;
}
.section-4 .container {
    display: flex;
    flex-direction: column;
    row-gap: 2rem;
}
.section-4 .container .content-txt{
    display: flex;
    flex-direction: column;
    row-gap: 1rem;
}
.section-4 .container .data-box{
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    row-gap: 1rem;
    justify-content: space-between;
}
.section-4 .container .data-box .data-item {
    display: flex;
    flex-direction: column;
    flex: 0 1 calc(25% - 1rem);
    row-gap: 0.5rem;
}
.section-4 .container .data-box .data-item .data-item-parameter {
    display: flex;
    flex-direction: column;
    row-gap: 0.5rem;
    align-items: center;
    background-color: rgba(30, 100, 140, 0.2);
    padding: 1.75rem 1rem;
    border-radius: 1rem;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease-in-out;
}
.section-4 .container .data-box .data-item .data-item-parameter:hover {
    box-shadow: 0 4px 24px rgba(51, 189, 189, 0.25);
}
.section-4 .container .data-box .data-item .data-item-parameter .data-title {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--moki-accent);
}
.section-4 .container .data-box .data-item .data-item-parameter .data-value {
    font-family: var(--font-montserrat);
    font-size: 2rem;
    font-weight: 900;
    color: #eee;
}
.section-4 .container .data-box .data-item .data-item-parameter .data-des {
    font-size: 1rem;
    font-weight: 500;
    color: #cbcbcb;
    margin-top: 1rem;
}
.section-4 .container .data-box .data-item .data-item-des {
    font-size: 1.25rem;
    font-weight: 500;
    color: #eee;
    margin-top: 2rem;
    background-color: rgba(51, 189, 189, 0.5);
    padding: 0.5rem 3px;
    border-radius: 2rem;
    text-align: center;
}

/* section-5 */
.section-5 {
    padding: 2rem 0;
}
.section-5 .container {
    display: flex;
    flex-direction: column;
    row-gap: 2rem;
}
.section-5 .container .content-txt{
    display: flex;
    flex-direction: column;
    row-gap: 1rem;
}
.section-5 .container .tech-box{
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: space-between;
}
.section-5 .container .tech-box .tech-card {
    flex: 0 1 calc(50% - 1rem);
    display: flex;
    flex-direction: column;
    row-gap: 1rem;
    background-color: rgba(30, 100, 140, 0.3);
    padding-bottom: 1rem;
    border-radius: 1rem;
    overflow: hidden;
}
.section-5 .container .tech-box .tech-card .tech-card-img {
    border-radius: 1rem;
    overflow: hidden;
}
.section-5 .container .tech-box .tech-card .tech-card-img img {
    transition: transform 0.3s ease-in-out;
}
.section-5 .container .tech-box .tech-card:hover .tech-card-img img {
    transform: scale(1.1);
}
.section-5 .container .tech-box .tech-card .tech-card-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 1rem;
}
.section-5 .container .tech-box .tech-card .tech-card-content h3 {
    color: var(--moki-accent);
    font-size: 1.75rem;
}
.section-5 .container .tech-box .tech-card .tech-card-content .sub-title {
    color: #eee;
    font-size: 1.25rem;
}
.section-5 .container .tech-box .tech-card .tech-card-content .tag {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.section-5 .container .tech-box .tech-card .tech-card-content .tag span {
    background-color: rgba(51, 189, 189, 0.4);
    color: #eee;
    padding: 3px 5px;
    border-radius: 0.5rem;
}
.section-5 .container .tech-box .tech-card .tech-card-content .tag span em {
    font-size: 1.25rem;
    font-weight: 700;
    font-style: normal;
}
.section-5 .container .tech-box .tech-card .tech-card-content .tech-card-des {
    color: #eee;
    font-size: 1rem;
    line-height: 1.5;
}

/* section-6 */
.section-6 {
    padding: 4rem 0;
}
.section-6 .container {
    display: flex;
    flex-direction: column;
    row-gap: 2rem;
}
.section-6 .container .content-txt{
    display: flex;
    flex-direction: column;
    row-gap: 1rem;
}
.section-6 .container .data-box {
    display: flex;
    flex-direction: column;
    flex-wrap: wrap;
    row-gap: 2.5rem;
}
.section-6 .container .data-box h3 {
    color: var(--moki-accent);
    font-size: 1.75rem;
    margin-top: 1rem;
}
.section-6 .container .data-box ul {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: normal;
    justify-content: space-between;
    gap: 2rem;
}
.section-6 .container .data-box ul li.data-item {
    flex: 0 1 calc(33.33% - 2rem);
    background-color: rgba(30, 100, 140, 0.2);
    padding: 2.5rem 1rem;
    border-radius: 1rem;
    text-align: center;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease-in-out;
}
.section-6 .container .data-box ul li.data-item:hover {
    box-shadow: 0 4px 24px rgba(51, 189, 189, 0.25);
}
.section-6 .container .data-box ul li.data-item .data-value {
    display: inline-block;
    font-family: var(--font-montserrat);
    font-size: 2rem;
    font-weight: 900;
    color: #eee;
    position: relative;
    z-index: 1;
}
.section-6 .container .data-box ul li.data-item .data-value::after {
    content: '';
    position: absolute;
    display: block;
    padding: 0 2rem;
    width: 100%;
    height: 40%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(51, 189, 189, 0.5);
    border-radius: 1rem;
    z-index: -1;
    transition: all 0.3s ease;
}
.section-6 .container .data-box ul li.data-item:hover .data-value::after {
    background-color: rgba(51, 189, 189, 0.3);
    top: 70%;
    scale: 0.95;
}
.section-6 .container .data-box ul li.data-item .data-name {
    font-size: 1.25rem;
    font-weight: 500;
    margin: 1rem 0;
    color: var(--moki-accent);
}
.section-6 .container .data-box ul li.data-item .data-des {
    color: #ccc;
    font-size: 1rem;
    margin-top: 2rem;
}

/* ========== section-1/2/3/4/5/6 区块响应式 ========== */

/* ≤1200：间距微调 */
@media screen and (max-width: 1200px) {
    .section-3 .structure-compare {
        gap: 2rem;
    }
}

/* ≤1024：section-1 高度自适应 */
@media screen and (max-width: 1024px) {
    .section-1 {
        height: auto;
        min-height: 60vh;
        padding: 3rem 0;
    }
    .section-1 .container {
        justify-content: center;
        gap: 2rem;
    }
    .section-1 .research-data {
        gap: 3rem;
    }
    .section-1 .research-data .card {
        flex: 0 1 calc(50% - 2.5rem);
    }

    .section-2 {
        padding: 3rem 0;
    }
    .section-2 .card-box {
        gap: 1.5rem;
    }
    .section-2 .card-box .card {
        flex: 0 1 calc(50% - 1.5rem);
    }
    .section-4 .container .data-box {
        row-gap: 5rem;
    }
    .section-4 .container .data-box .data-item {
        flex: 0 1 calc(50% - 1rem);
    }

}

/* ≤768：card-box 2列→1列，research-data 折行 */
@media screen and (max-width: 768px) {
    .section-1 {
        min-height: auto;
        padding: 2.5rem 0;
    }
    .section-1 .content-txt {
        width: 90%;
    }
    .section-1 .research-data {
        flex-wrap: wrap;
        gap: 2rem;
    }

    .section-2 {
        padding: 2.5rem 0;
    }
    .section-2 .card-box .card {
        flex: 0 1 100%;
    }

    .section-3 {
        height: 70vh;
        min-height: auto;
        padding: 2rem 0;
    }
    .section-3 .container .content-txt {
        bottom: 2rem;
        left:unset;
        transform: none;
        width: 100%;
        margin: 1rem auto;
    }
    .section-3 .structure-compare {
        flex-direction: column;
        gap: 1.5rem;
        align-items: center;
    }
    .section-3 .structure-compare .compare-item {
        width: 100%;
        max-width: 20rem;
    }

    .section-4 .container .data-box .data-item {
        flex: 0 1 calc(50% - 0.5rem);
    }
    .section-4 .container .data-box .data-item .data-item-parameter {
        padding: 1rem 0.25rem;
    }
    .section-4 .container .data-box .data-item .data-item-des {
        padding: 0.5rem 0.25rem;
    }

    .section-5 .container .tech-box .tech-card .tech-card-content .tag span {
        font-size: 0.8rem;
    }
    .section-5 .container .tech-box .tech-card .tech-card-content .tag span em{
        font-size: 1rem;
    }

    .section-6 .container .data-box h3 {
        text-align: center;
    }
    .section-6 .container .data-box ul{
        gap: 1.25rem;
    }

}

/* ≤640：结构对比堆叠 */
@media screen and (max-width: 640px) {
    .section-1 {
        padding: 2rem 0;
    }
    .section-1 .research-data {
        gap: 1.5rem;
    }

    .section-2 {
        padding: 2rem 0;
    }

    .section-3 {
        height: 60vh;
    }

    .section-5 .container .tech-box{
        flex-direction: column;
        gap: 1.5rem;
    }

    .section-6 .container .data-box ul{
        gap: 1rem;
    }
}

/* ≤440 */
@media screen and (max-width: 440px) {
    .section-1 {
        padding: 1.5rem 0;
    }
    .section-2 {
        padding: 1.5rem 0;
    }
    .section-4 {
        padding: 1.5rem 0;
    }
    .section-5 {
        padding: 1.5rem 0;
    }
    .section-6 {
        padding: 1.5rem 0;
    }
    
    .section-6 .container .data-box ul {
        flex-direction: row;
    }
    .section-6 .container .data-box ul li.data-item {
        flex: 0 1 calc(50% - 0.5rem);
    }
}