/* ========== 追光边框：自定义属性（驱动 conic-gradient 动画） ========== */
@property --chase-angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

/* section-1 */
.section-1 {
    padding: 5rem 0 2.5rem;
}
.section-1 .content-txt {
    margin-bottom: 1rem;
    letter-spacing: 2px;
}
.section-1 .content-txt .title-en {
    margin: 1rem 0;
}
.section-1 .content-img {
    position: relative;
    width: 100%;
    height: auto;
    padding: 0;
    border-radius: 2rem;
    overflow: hidden;
}
.section-1 .content-img::after {
    content: '';
    position: absolute;
    inset: 0;
    padding: 10px;
    border-radius: 2rem;
    background: linear-gradient(45deg, rgba(51, 189, 189, 0.5), rgba(51, 189, 189, 0.1));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}
.section-1 .content-img:hover img {
    transform: scale(1.1);
}
.section-1 .content-img img {
    width: 100%;
    display: block;
    transition: all ease-in-out .3s;
}

/* section-2 */
.section-2 {
    padding: 2.5rem 0;
}
.section-2 .content-txt p {
    margin: 1rem 0 2rem 0;
}
.section-2 .quality-control {
    display: flex;
    justify-content: space-between;
}
.section-2 .quality-control .card {
    flex: 0 1 30%;
}
.section-2 .quality-control .card .card-img {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    padding: 0.75rem;
    transition: ease-in-out all .3s;
}
.section-2 .quality-control .card:hover .card-img {
    transform: scale(1.03);
}
.section-2 .quality-control .card .card-img::after {
    content: '';
    position: absolute;
    display: block;
    width: 110%;
    height: 110%;
    top: 0;
    left: 0;
    background: rgba(51, 189, 189, 0.1);
}
.section-2 .quality-control .card .card-img img {
    width: 100%;
    display: block;
    border-radius: 1rem;
}
.section-2 .quality-control .card .card-title {
    display: inline-block;
    margin-top: 1.75rem;
    color: #fff;
    padding: 3px 5px;
    border-radius: 5px;
    line-height: 1.5;
    background-color:rgba(51, 189, 189, 0.5);
}

/* section-3 */
.section-3 {
    padding: 2.5rem 0;
}
.section-3 .title-box {
    margin: 1rem auto 2rem auto;
    display: flex;
}
.section-3 .title-box .title-nav {
    color: #ccc;
    border: 1px solid #333;
    border-radius: 5rem;
    margin: 0 auto;
    padding: 0 0;
    width: auto;
    height: auto;
    display: flex;
    flex-wrap: nowrap;
    flex-direction: row;
    gap: 1rem;
}
.section-3 .title-box .title-nav .title {
    padding: 5px 10px;
    line-height: 1.5;
    border-radius: 5rem;
    font-size: 0.95rem;
    font-weight: 900;
    cursor: pointer;
}
.section-3 .title-box .title-nav .title.active {
    background-color: var(--moki-blue);
    color: #000;
}
.section-3 .regulation-card {
    line-height: 1.5;
    text-align: center;
}
.section-3 .regulation-swiper {
    overflow: hidden;
    border-radius: 1rem;
}
.section-3 .regulation-swiper .swiper-wrapper {
    align-items: stretch;
}
.section-3 .regulation-card .card .card-img {
    background-color: rgba(51, 189, 189, 0.1);
    padding: 1rem;
    border-radius: 1rem;
    overflow: hidden;
    cursor: grab;
}
.section-3 .regulation-card .card .card-img img {
    width: 100%;
    display: block;
    border-radius: 1rem;
}
.section-3 .title-nav .title {
    cursor: pointer;
    user-select: none;
    transition: background-color 0.3s ease, color 0.3s ease;
}
/* section-4 */
.section-4 {
    padding: 2.5rem 0;
}
.section-4 .content-txt .title-en {
    margin: 1rem 0;
}
.section-4 .content-txt .des {
    margin-bottom: 1.75rem;
}
.section-4 .eliquid-lab .img-box {
    border-radius: 1rem;
    overflow: hidden;
}
.section-4 .eliquid-lab:hover .img-box img {
    transform: scale(1.02);
}
.section-4 .eliquid-lab .img-box img {
    width: 100%;
    display: block;
    transition: all ease-in-out .3s;
}
.section-4 .eliquid-lab .lab-para {
    display: flex;
    column-gap: 4rem;
    justify-content: center;
    margin-top: 4rem;
}
.section-4 .eliquid-lab .lab-para .card {
    flex: 0 1 22%;
    color: #fff;
    border: none;
    border-radius: 1rem;
    text-align: center;
    padding: 15px 15px;
    background-color: rgba(51, 189, 189, 0.1);
    cursor: pointer;
    position: relative;
    z-index: 0;
    box-shadow:
        0 0 12px rgba(255, 215, 0, 0.10),
        0 0 28px rgba(123, 187, 189, 0.06);
    transition: box-shadow 0.4s ease;
}
.section-4 .eliquid-lab .lab-para .card:hover {
    box-shadow:
        0 0 20px rgba(255, 215, 0, 0.22),
        0 0 44px rgba(123, 187, 189, 0.13);
}

/* 追光边框层 —— 仅边框环区域可见渐变，中心被 mask 裁掉 */
.section-4 .eliquid-lab .lab-para .card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 1rem;
    padding: 2px;
    z-index: -1;
    background: conic-gradient(
        from var(--chase-angle),
        /* ---- 暗区：60%（216deg） ---- */
        transparent                             0deg,
        transparent                           216deg,
        /* ---- 柔和爬升：15%（54deg） ---- */
        rgba(123, 187, 189, 0.06)             234deg,
        rgba(123, 187, 189, 0.16)             252deg,
        rgba(123, 187, 189, 0.40)             270deg,
        /* ---- 均匀亮区：20%（72deg） ---- */
        rgba(118, 184, 186, 0.64)             288deg,
        rgba(110, 180, 183, 0.80)             306deg,
        rgba(110, 180, 183, 0.82)             324deg,
        rgba(118, 184, 186, 0.60)             342deg,
        /* ---- 柔和消退：5%（18deg） ---- */
        rgba(123, 187, 189, 0.22)             354deg,
        rgba(123, 187, 189, 0.04)             360deg
    );
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    filter: drop-shadow(0 0 6px rgba(255, 215, 0, 0.35));
    animation: chase-angle var(--chase-speed, 4s) linear infinite;
    pointer-events: none;
}
/* 悬停加速 */
.section-4 .eliquid-lab .lab-para .card:hover::before {
    animation-duration: calc(var(--chase-speed, 4s) * 0.5);
}

@keyframes chase-angle {
    from { --chase-angle: 0deg; }
    to   { --chase-angle: 360deg; }
}
.section-4 .eliquid-lab .lab-para .card .title {
    position: relative;
    font-family: var(--font-montserrat);
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 900;
    line-height: 1.5;
    z-index: 1;
}
.section-4 .eliquid-lab .lab-para .card .title::after {
    content: '';
    position: absolute;
    display: block;
    padding: 0 2rem;
    width: 100%;
    height: 30%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(51, 189, 189, 0.3);
    border-radius: 2rem;
    transition: all ease-in-out .3s;
    z-index: -1;
}
.section-4 .eliquid-lab .lab-para .card:hover .title::after {
    transform: translate(-50%, -15%);
}
.section-4 .eliquid-lab .lab-para .card .des {
    margin-top: 0.5rem;
}
/* section-5 */
.section-5 {
    padding: 2.5rem 0 5rem;
}
.section-5 .lab-device {
    color: #eee;
}
.section-5 .lab-device .section-title {
    color: var(--moki-blue);
    text-align: center;
}
.section-5 .lab-device .device-nav {
    margin: 2rem 0 1.5rem 0;
    padding: 0 1rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.section-5 .lab-device .device-nav::-webkit-scrollbar {
    display: none;
}
.section-5 .lab-device .device-nav ul {
    position: relative;
    width: 80%;
    max-width: 1460px;
    margin: 0 auto;
    display: flex;
    flex-wrap: nowrap;
    column-gap: 1.5rem;
    z-index: 0;
    white-space: nowrap;
    padding-bottom: 0.5rem;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(125,223,221,0.5) rgba(255, 255, 255, 0.2);
}
.section-5 .lab-device .device-nav ul::-webkit-scrollbar {
    height: 4px;
}
.section-5 .lab-device .device-nav ul::-webkit-scrollbar-thumb {
    background-color: var(--moki-accent);
    border-radius: 4px;
}
.section-5 .lab-device .device-nav ul::-webkit-scrollbar-track {
    background-color: rgba(255, 255, 255, 0.25);
}
.section-5 .lab-device .device-nav ul::after {
    position: absolute;
    display: block;
    content: '';
    width: auto;
    border-bottom: 1px solid #ccc;
    bottom: 1px;
    z-index: -1;
}
.section-5 .lab-device .device-nav ul li {
    flex: 0 0 auto;
    padding-bottom: 0.55rem;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    transition: border-color 0.3s ease, color 0.3s ease;
}
.section-5 .lab-device .device-nav ul li:hover {
    color: var(--moki-blue);
}
.section-5 .lab-device .device-nav ul li.active {
    border-bottom: 3px solid var(--moki-blue);
    color: var(--moki-blue);
}

/* device-img 跑马灯容器 */
.section-5 .lab-device .device-img {
    overflow: hidden;
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
    touch-action: pan-y;
    position: relative;
    background-color: rgba(123, 187, 189, 0.20);
}
.section-5 .lab-device .device-img:active {
    cursor: grabbing;
}
.section-5 .lab-device .device-img.dragging {
    cursor: grabbing;
}
.section-5 .lab-device .device-img ul {
    display: flex;
    flex-wrap: nowrap;
    column-gap: 1rem;
    background-color: rgba(90, 102, 102, 0.1);
    padding: 1.25rem 0;
    will-change: transform;
    transition: none;
}
.section-5 .lab-device .device-img ul.smooth-scroll {
    transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.section-5 .lab-device .device-img ul li {
    flex: 0 0 calc(33.333% - 0.667rem);
    border-radius: 1rem;
    overflow: hidden;
    filter: brightness(0.5);
    transition: filter 0.4s ease;
    position: relative;
}
.section-5 .lab-device .device-img ul li.active {
    filter: brightness(1);
}
.section-5 .lab-device .device-img ul li img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    pointer-events: none;
}

/* 响应式：平板 */
@media screen and (max-width: 1024px) {
    .section-5 .lab-device .device-img ul li {
        flex: 0 0 calc(50% - 0.5rem);
    }
    .section-5 .lab-device .device-nav ul {
        column-gap: 1rem;
    }
}

/* 响应式：手机 */
@media screen and (max-width: 640px) {
    .section-5 .lab-device .device-img ul li {
        flex: 0 0 82%;
    }
    .section-5 .lab-device .device-img ul {
        column-gap: 0.75rem;
    }
    .section-5 .lab-device .device-nav ul {
        column-gap: 0.75rem;
        scrollbar-width: none;
        justify-content: flex-start;
    }
    .section-5 .lab-device .device-nav ul::-webkit-scrollbar {
        display: none;
    }
    .section-5 .lab-device .device-nav ul li {
        font-size: 0.875rem;
        padding-bottom: 0.4rem;
    }
}

/* ========== section-1~4 响应式 ========== */

/* ≤1200：padding 微调 */
@media screen and (max-width: 1200px) {
    .section-1,
    .section-2,
    .section-3,
    .section-4,
    .section-5 {
        padding: 4rem 0;
    }
}

/* ≤1024：section-2 3列→2列，间距缩减 */
@media screen and (max-width: 1024px) {
    .section-1,
    .section-2,
    .section-3,
    .section-4,
    .section-5 {
        padding: 3.5rem 0;
    }

    .section-2 .quality-control {
        flex-wrap: wrap;
        gap: 1.5rem;
    }
    .section-2 .quality-control .card {
        flex: 0 1 calc(50% - 1.5rem);
    }

    .section-4 .eliquid-lab .lab-para {
        flex-wrap: wrap;
        gap: 1.5rem;
    }
    .section-4 .eliquid-lab .lab-para .card {
        flex: 0 1 calc(50% - 1.5rem);
    }

    .section-3 .title-box {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.75rem;
    }
}

/* ≤768：section-2 2列→1列，lab-para 变小 */
@media screen and (max-width: 768px) {
    .section-1,
    .section-2,
    .section-3,
    .section-4,
    .section-5 {
        padding: 2.5rem 0;
    }

    .section-1 .content-img {
        border-radius: 1.5rem;
    }
    .section-1 .content-img::after {
        border-radius: 1.5rem;
    }

    .section-2 .quality-control .card {
        flex: 0 1 100%;
    }

    .section-3 .title-box .title-nav {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .section-4 .eliquid-lab .lab-para {
        gap: 1rem;
    }
    .section-4 .eliquid-lab .lab-para .card {
        flex: 0 1 100%;
        max-width: 18rem;
        margin: 0 auto;
    }
}

/* ≤640：所有间距继续缩小 */
@media screen and (max-width: 640px) {
    .section-1,
    .section-2,
    .section-3,
    .section-4,
    .section-5 {
        padding: 2rem 0;
    }

    .section-1 .content-img {
        border-radius: 1.25rem;
    }
    .section-1 .content-img::after {
        border-radius: 1.25rem;
    }

    .section-3 .title-box {
        margin: 0.75rem auto 1.25rem auto;
    }
}

/* ≤440 */
@media screen and (max-width: 440px) {
    .section-1,
    .section-2,
    .section-3,
    .section-4,
    .section-5 {
        padding: 1.5rem 0;
    }

    .section-1 .content-img {
        border-radius: 1rem;
    }
    .section-1 .content-img::after {
        border-radius: 1rem;
        padding: 8px;
    }

    .section-2 .content-txt p {
        margin: 0.75rem 0 1.25rem 0;
    }
}