html, body {
    padding: 0;
    margin: 0;
}
/* Always show vertical scrollbar to avoid width changes on load */
html {
    overflow-y: scroll;
}
/* 去掉a标签默认样式 */
.menu-item a {
    text-decoration: none;
    color: inherit;
}
.menu-item a:hover {
    color: inherit;
}
.flex {
    display: flex;
}
.flex-col-c-e {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
}
.flex-c {
    display: flex;
    align-items: center;
}
.flex-c-c {
    display: flex;
    align-items: center;
    justify-content: center;
}
.flex--b {
    display: flex;
    justify-content: space-between;
}
.flex-col-c {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.flex-1 {
    flex: 1;
}
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4.5rem;
    background: transparent;
    padding: 0 14%;
    box-sizing: border-box;
    z-index: 1000;
    transition: background-color .3s ease, color .3s ease, box-shadow .3s ease;
}
.logo {
    width: 9rem;
    height: auto;
    aspect-ratio: 126 / 30;
    background-image: url(../img/logo.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    margin-right: 32px;
}
/* menu toggle (hamburger) */
.menu-toggle {
    display: none;
    margin-left: auto;
    width: 6rem;
    height: 6rem;
    background: none;
    border: none;
    position: relative;
    cursor: pointer;
}
.menu-toggle:before,
.menu-toggle:after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: .5rem;
    background: currentColor;
}
.menu-toggle:before { top: 4px; }
.menu-toggle:after { bottom: 4px; }
.menu-toggle i {
    display: block;
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: .5rem;
    background: currentColor;
    transform: translateY(-50%);
}
.menu-item {
    font-family: Inter;
    margin-left: 2rem;
    font-size: 1.25rem;
    font-weight: 400;
    color: #fff;
    font-family: Inter;
    font-style: Regular;
    transition: color .3s ease;
    cursor: pointer;
}
.new-banner {
    width: 100%;
    height: 51.625rem;
    background-image: url(../img/banner.jpg);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

/* Header sticky styles */
.header.sticky {
    position: fixed;
    background: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.header.sticky .menu-item {
    color: #000;
}
.header.sticky .logo {
    background-image: url(../img/logo_dark.png);
}
.banner-title {
    font-family: Inter;
    font-weight: 800;
    font-style: Extra Bold;
    font-size: 3.125rem;
    color: #fff;
}
.banner-desc {
    font-family: Inter;
    font-weight: 600;
    font-style: Semi Bold;
    font-size: 1.5625rem;
    color: #fff;
    margin-top: 2rem;
}
.banner-btn {
    width: 12.375rem;
    height: 3.1875rem;
    line-height: 3.1875rem;
    border-radius: 1rem;
    background-color: #fff;
    font-family: Inter;
    font-weight: 500;
    font-style: Medium;
    font-size: 1.25rem;
    text-align: center;
    margin-top: 2.5rem;
    cursor: pointer;
}
.main-width {
    width: 81.5625rem;
    margin: 0 auto;
    margin-top: 6.25rem;
}
.seo-title {
    font-family: Inter;
    font-weight: 800;
    font-style: Extra Bold;
    font-size: 3.125rem;
}
.seo-desc {
    width: 30.8125rem;
    font-family: Inter;
    font-weight: 400;
    font-style: Regular;
    font-size: 1.5625rem;
    margin-top: 3.125rem;
}
.seo-desc>div {
    line-height: 2.8125rem;
}
.seo-btn {
    width: 12.375rem;
    height: 3.1875rem;
    line-height: 3.1875rem;
    border-radius: 1rem;
    font-family: Inter;
    font-weight: 500;
    font-style: Medium;
    font-size: 1.25rem;
    color: #fff;
    background-color: #000;
    text-align: center;
    margin-top: 2.8125rem;
    cursor: pointer;
}
.seo-wrapper {
    position: relative;
    padding-bottom: 3.125rem;
    scroll-margin-top: 9.375rem;
}
.seo-wrapper .right-img {
    width: 48.25rem;
    height: 43.25rem;
    background-image: url(../img/seo_img.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    position: absolute;
    top: -9rem;
    right: 0;
}
.imt-wrapper .left-img {
    width: 43.375rem;
    height: 40.624rem;
    background-image: url(../img/imt_img.jpg);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}
.right-desc {
    color: #fff;
    background: #000;
    padding: 2.45rem;
}
.imt-title {
    font-family: Inter;
    font-weight: 800;
    font-style: Extra Bold;
    font-size: 3.125rem;
}
.imt-sub-title {
    font-family: Inter;
    font-weight: 700;
    font-style: Bold;
    font-size: 1.5625rem;
    margin-bottom: 3.125rem;
}
.imt-desc {
    font-family: Inter;
    font-weight: 400;
    font-style: Regular;
    font-size: 1.5625rem;
}
.imt-btn {
    width: 12.375rem;
    height: 3.1875rem;
    line-height: 3.1875rem;
    border-radius: 1rem;
    background-color: #fff;
    font-family: Inter;
    font-weight: 500;
    font-style: Medium;
    font-size: 1.25rem;
    text-align: center;
    color: #000;
    margin-top: 2.5rem;
    cursor: pointer;
}
.flow-title {
    font-family: Inter;
    font-weight: 800;
    font-style: Extra Bold;
    font-size: 3.125rem;
    margin-bottom: 1.875rem;
}
.seo-flow {
    width: 37.5rem;
    background-image: url(../img/flew_seo_bg.jpg);
}
.red-flow {
    width: 17.6875rem;
    background-image: url(../img/flew_red_bg.jpg);
}
.ad-flow {
    width: 25.125rem;
    background-image: url(../img/flew_ad_bg.jpg);
}

.flow-item {
    height: 28.625rem;
    background-size: 100% 100%;
    background-repeat: no-repeat;
    border-radius: 2rem;
}
.flow-item .text {
    height: 100%;
    color: #fff;
    padding: 0 1.875rem 1.25rem;
    box-sizing: border-box;
    /* 从透明渐变透明黑 */
    background: linear-gradient(to bottom, rgba(0,0,0,0) 0%, rgba(0,0,0,0.9) 100%);
    border-radius: 2rem;
}
.flow-item-title {
    font-family: Inter;
    font-weight: 700;
    font-style: Bold;
    font-size: 1.75rem;
}
.flow-item-desc {
    font-family: Inter;
    font-weight: 400;
    font-style: Regular;
    font-size: 1.125rem;
    text-align: center;
    margin-top: 0.625rem;
    line-height: 2.5rem;
    opacity: .8;
}
.pay-wrapper {
    margin-top: 6.25rem;
}
.pay-wrapper .left-img {
    width: 62.9375rem;
    height: 46.875rem;
    background-image: url(../img/pay_img.jpg);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}
.pay-wrapper .right-desc {
    font-family: Inter;
    font-weight: 400;
    font-style: Regular;
    font-size: 1.5625rem;
    line-height: 5rem;
    background: #000;
    color: #fff;
    /* padding: 0 5rem; */
    text-align: center;
}
.pay-wrapper .right-desc .large {
    font-size: 3.75rem;
}
.introduction-title {
    font-family: Inter;
    font-weight: 800;
    font-style: Extra Bold;
    font-size: 3.125rem;
    line-height: 100%;

}
.introduction-sub-title {
    font-family: Inter;
    font-weight: 400;
    font-style: Regular;
    font-size: 1.5625rem;
    line-height: 2.1875rem;
    margin-top: 1.25rem;
}
.introduction-wrapper {
    scroll-margin-top: 9.375rem;
}
.introduction-wrapper .other-item .num {
    font-family: Inter;
    font-weight: 800;
    font-style: Extra Bold;
    font-size: 5rem;
}
.introduction-wrapper .other-item .text {
    font-family: Inter;
    font-weight: 400;
    font-style: Regular;
    font-size: 1.5625rem;
    line-height: 2.1875rem;
}
.introduction-wrapper .other-item {
    margin-top: 3.125rem;
    margin-right: 17rem;
}
.introduction-wrapper .other-item:last-child {
    margin-right: 0;
}
.introduction-img {
    width: 80rem;
    height: 33.1875rem;
    border-radius: 1.875rem;
    background-image: url(../img/introduction_img.jpg);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    margin-top: 5rem;
}
.core-wrapper {
    position: relative;
    margin-top: 6.25rem;
}
.core-wrapper .core-wrapper-bg {
    width: 100%;
    height: 40.1875rem;
    background: url('../img/core_bg.jpg') no-repeat 0 0;
    background-size: 100% 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
}
.core-wrapper .core-title {
    font-family: Inter;
    font-weight: 800;
    font-style: Extra Bold;
    font-size: 3.125rem;
    color: #fff;
    text-align: center;
}
.core-wrapper .core-list {
    width: 100%;
    margin-top: 3.125rem;
}
.core-wrapper .core-item {
    width: 24rem;
    height: 32.625rem;
    border-radius: .75rem;
    border: 0.125rem solid #000;
    font-family: Inter;
    font-weight: 400;
    font-style: Regular;
    font-size: 1.5625rem;
    line-height: 3.625rem;
    padding: 5rem 1.5rem;
    box-sizing: border-box;
    background-color: #fff;
}
.core-wrapper .core-item .core-item-title {
    font-family: Inter;
    font-weight: 700;
    font-style: Bold;
    font-size: 2.5rem;
    line-height: 3.625rem;
}
.core-wrapper .core-item .core-item-desc {
    font-family: Inter;
    font-weight: 400;
    font-style: Regular;
    font-size: 1.5625rem;
    line-height: 3.625rem;
    margin-top: 1.875rem;
    text-align: center;
}
.kpi-wrapper .kpi-title {
    font-family: Inter;
    font-weight: 800;
    font-style: Extra Bold;
    font-size: 3.125rem;
}
.kpi-wrapper .kpi-list {
    width: 100%;
    margin-top: 5rem;
}
.kpi-wrapper .kpi-list .kpi-item {
    margin-bottom: 3.75rem;
    border-radius: 1rem;
    box-shadow: .25rem .25rem .25rem 0 #00000040;
    background: #fbfbfb;
}
.kpi-wrapper .kpi-list .accompany {
    box-shadow: -.25rem .25rem .25rem 0px #00000040;
}
.kpi-wrapper .kpi-list .kpi-item:last-child {
    margin-bottom: 0;
}
.kpi-wrapper .kpi-item .kpi-item-text {
    flex: 1;
    height: 18.75rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 7.5rem;
    box-sizing: border-box;
}
.kpi-wrapper .kpi-item .kpi-item-title {
    font-family: Inter;
    font-weight: 600;
    font-style: Semi Bold;
    font-size: 2.5rem;
    line-height: 4.6875rem;
}
.kpi-wrapper .kpi-item .kpi-item-desc {
    font-family: Inter;
    font-weight: 400;
    font-style: Regular;
    font-size: 1.5625rem;
    line-height: 4.6875rem;
}
.kpi-wrapper .accompany .kpi-item-title,
.kpi-wrapper .accompany .kpi-item-desc {
    text-align: right;
}
.kpi-wrapper .kpi-item .accompany {
    align-items: flex-end;
}
.kpi-wrapper .kpi-item .img {
    border-radius: 1rem;
}
.kpi-wrapper .kpi-item .img-1 {
    min-width: 18.75rem;
    height: auto;
    aspect-ratio: 1;
    background-image: url(../img/kpi_img1.jpg);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}
.kpi-wrapper .kpi-item .img-2 {
    min-width: 18.75rem;
    height: auto;
    aspect-ratio: 1;
    background-image: url(../img/kpi_img2.jpg);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}
.kpi-wrapper .kpi-item .img-3 {
    min-width: 18.75rem;
    height: auto;
    aspect-ratio: 1;
    background-image: url(../img/kpi_img3.jpg);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}
.cust-wrapper {
    width: 100%;
    height: 67.5rem;
    background-image: url(../img/cust_bg.jpg);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    margin-top: 6.25rem;
    scroll-margin-top: 9.375rem;
}
.consult-wrapper {
    position: fixed;
    top: 50%;
    right: 4rem;
    transform: translateY(-50%);
    width: 4.5625rem;
    height: 14.375rem;
    border-radius: 6.25rem;
    border: 2px solid #000;
    z-index: 1000;
    background: rgba(255,255,255,1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.consult-wrapper .consult-item {
    padding: .5rem .3125rem;
    border-bottom: 1px solid #000;
    cursor: pointer;
    position: relative;
}
.consult-wrapper .consult-item span {
    font-family: Inter;
    font-weight: 400;
    font-style: Regular;
    font-size: 0.9375rem;
    letter-spacing: 20%;
}
.consult-wrapper .consult-item:last-child {
    border-bottom: none;
}
.consult-wrapper .consult-icon {
    display: block;
    width: 2.3125rem;
    height: 2.3125rem;
    background-image: url(../img/icon/consult_icon.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}
.consult-wrapper .wechat-icon {
    display: block;
    width: 2.3125rem;
    height: 2.3125rem;
    background-image: url(../img/icon/wechat_icon.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}
.consult-wrapper .top-icon {
    display: block;
    width: 2.3125rem;
    height: 2.3125rem;
    background-image: url(../img/icon/top_icon.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

/* WeChat QR code popup */
.wechat-qr-popup {
    position: absolute;
    right: 110%;
    top: 50%;
    transform: translateY(-50%);
    width: 17rem;
    height: 19rem;
    background: #1890ff;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    margin-right: 1rem;
    opacity: 1;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
}

.wechat-qr-popup::after {
    content: '';
    position: absolute;
    right: -0.5rem;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 0.5rem solid #fff;
    border-top: 0.5rem solid transparent;
    border-bottom: 0.5rem solid transparent;
}

.wechat-qr-popup.we-show {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
}
.wechat-qr-popup img {
    width: 13rem;
    height: auto;
    object-fit: contain;
    aspect-ratio: 1;
    border-radius: 0.5rem;
}

.wechat-qr-popup .qr-text {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    font-family: Inter;
    font-size: 0.875rem;
    color: #fff;
    white-space: nowrap;
}

/* Phone popup */
.phone-popup {
    position: absolute;
    right: 110%;
    top: 50%;
    transform: translateY(-50%);
    width: 20rem;
    height: 5rem;
    background: #fff;
    border-radius: 0.5rem;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    margin-right: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1001;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    border: 1px solid #e0e0e0;
}

.phone-popup::after {
    content: '';
    position: absolute;
    right: -0.5rem;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 0.5rem solid #fff;
    border-top: 0.5rem solid transparent;
    border-bottom: 0.5rem solid transparent;
}

.phone-popup.phone-show {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
}

.phone-popup .phone-number {
    font-family: Inter;
    font-weight: 700;
    font-size: 1.4rem;
    color: #1890ff;
}
.phone-popup .phone-number span {
    font-family: Inter;
    font-weight: 700;
    font-size: 1.2rem;
    color: #1890ff;
}

.phone-popup .phone-text {
    font-family: Inter;
    font-size: 0.875rem;
    color: #666;
}

/* 弹窗模态框样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.modal-show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    position: relative;
    /* width: 90%;
    max-width: 50rem; */
    min-width: 30rem;
    height: 38rem;
    background: #fff;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    display: flex;
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s ease;
}

.modal-overlay.modal-show .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 2rem;
    height: 2rem;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: #666;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
    color: #fff;
}

.modal-close:hover {
    background: #f0f0f0;
    color: #333;
}

.modal-left {
    width: 100%;
    background: #1890ff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    /* box-sizing: border-box; */
}

.modal-logo {
    margin-bottom: 2rem;
    width: 12rem;
    height: auto;
    aspect-ratio: 126 / 30;
    background-image: url(../img/logo.png);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    position: relative;
    left: -7rem;
    top: -3rem;
}

.modal-qr {
    width: 20rem;
    height: 20rem;
    background: #fff;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    padding: 0.5rem;
    box-sizing: border-box;
}

.modal-qr img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.modal-qr-text {
    font-family: Inter;
    font-size: 1.5rem;
    color: #fff;
    text-align: center;
}

.modal-right {
    width: 60%;
    padding: 3rem 2rem;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.modal-section {
    margin-bottom: 5rem;
}

/* .modal-section:last-child {
    margin-bottom: 0;
} */

.modal-section-title {
    font-family: Inter;
    font-weight: 600;
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.modal-icon {
    margin-right: 0.5rem;
    font-size: 1.5rem;
}

.modal-phone-number,
.modal-qq-number {
    font-family: Inter;
    font-weight: 700;
    font-size: 2.5rem;
    color: #1890ff;
    line-height: 1.2;
}

@media (max-width: 768px) {
    .main-width {
        width: 100%;
    }
    /* SEO section mobile enlargement */
    .seo-wrapper {
        display: flex;
        flex-direction: column;
        align-items: center;
        margin-bottom: 18rem
    }
    .seo-wrapper .left-desc {
        width: 80%;
    }
    .seo-wrapper .right-img {
        position: relative;
        top: 10rem;
        width: 78.0625rem;
        height: 70rem;
    }
    .seo-title {
        font-size: 6.25rem; /* 3.125rem * 2 */
    }
    .seo-desc {
        width: 95rem; /* 30.8125rem * 2 */
        font-size: 3.125rem; /* 1.5625rem * 2 */
        margin-top: 6.25rem; /* 3.125rem * 2 */
    }
    .seo-desc>div {
        line-height: 5.625rem; /* 2.8125rem * 2 */
    }
    .seo-btn {
        width: 24.75rem; /* 12.375rem * 2 */
        height: 6.375rem; /* 3.1875rem * 2 */
        line-height: 6.375rem; /* 3.1875rem * 2 */
        font-size: 2.5rem; /* 1.25rem * 2 */
        margin-top: 5.625rem; /* 2.8125rem * 3 */
    }
    /* IMT section mobile enlargement */
    .imt-wrapper {
        display: flex;
        flex-direction: column-reverse;
        align-items: center;
        width: 100%;
    }
    .imt-wrapper .left-img {
        width: 100vw; /* 43.375rem * 2 */
        height: auto;
        aspect-ratio: 43.375 / 40.624; /* 保持原始宽高比 */
    }
    .imt-wrapper .right-desc {
        width: 100vw;
        padding: 10rem;
        box-sizing: border-box;
    }
    .imt-title {
        font-size: 6.25rem; /* 3.125rem * 2 */
    }
    .imt-sub-title {
        font-size: 3.125rem; /* 1.5625rem * 2 */
        margin-bottom: 6.25rem; /* 3.125rem * 2 */
    }
    .imt-desc {
        font-size: 3.125rem; /* 1.5625rem * 2 */
    }
    .imt-btn {
        width: 24.75rem; /* 12.375rem * 2 */
        height: 6.375rem; /* 3.1875rem * 2 */
        line-height: 6.375rem; /* 3.1875rem * 2 */
        font-size: 2.5rem; /* 1.25rem * 2 */
        margin-top: 5rem; /* 2.5rem * 2 */
    }
    /* PAY: stack, enlarge, center */
    .pay-wrapper {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .pay-wrapper .left-img {
        width: 100vw;
        height: auto;
        aspect-ratio: 62.9375 / 46.875; /* 保持原始宽高比 */
    }
    .pay-wrapper .right-desc {
        font-size: 3.125rem; /* 1.5625rem * 2 */
        line-height: 10rem; /* 5rem * 2 */
        padding: 10rem 5rem;
    }
    .pay-wrapper .right-desc .large {
        font-size: 7.5rem; /* 3.75rem * 2 */
    }
    /* Flow wrapper mobile adaptation */
    .flow-title {
        font-size: 6.25rem; /* 3.125rem * 2 */
        margin-bottom: 3.75rem; /* 1.875rem * 2 */
        padding: 0 5rem;
    }
    .seo-flow {
        width: 75rem; /* 37.5rem * 2 */
    }
    .red-flow {
        width: 35.375rem; /* 17.6875rem * 2 */
    }
    .ad-flow {
        width: 50.25rem; /* 25.125rem * 2 */
    }
    .flow-item {
        height: 57.25rem; /* 28.625rem * 2 */
        border-radius: 4rem; /* 2rem * 2 */
        flex-shrink: 0; /* 防止收缩 */
    }
    .flow-item .text {
        padding: 0 3.75rem 2.5rem; /* 0 1.875rem 1.25rem * 2 */
        border-radius: 4rem; /* 2rem * 2 */
    }
    .flow-item-title {
        font-size: 3.5rem; /* 1.75rem * 2 */
    }
    .flow-item-desc {
        font-size: 2.25rem; /* 1.125rem * 2 */
        margin-top: 1.25rem; /* 0.625rem * 2 */
        line-height: 5rem; /* 2.5rem * 2 */
    }
    .flow-list {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        scrollbar-color: #888 #f1f1f1;
        gap: 2rem; /* 添加间距 */
        padding: 0 3rem 2rem; /* 为滚动条留出空间 */
        width: 100%; /* 限制容器宽度为100% */
        box-sizing: border-box;
    }
    .flow-list::-webkit-scrollbar {
        height: 8px;
    }
    .flow-list::-webkit-scrollbar-track {
        background: #f1f1f1;
        border-radius: 4px;
    }
    .flow-list::-webkit-scrollbar-thumb {
        background: #888;
        border-radius: 4px;
    }
    .flow-list::-webkit-scrollbar-thumb:hover {
        background: #555;
    }
    /* Introduction wrapper mobile adaptation */
    .introduction-title {
        font-size: 6rem;
        padding: 0 2rem;
        text-align: center;
    }
    .introduction-sub-title {
        font-size: 3rem;
        line-height: 6rem;
        margin-top: 3rem;
        padding: 0 6rem;
        text-align: center;
    }
    .introduction-wrapper .other-item .num {
        font-size: 8rem;
    }
    .introduction-wrapper .other-item .text {
        font-size: 3.5rem;
        line-height: 6rem;
    }
    .introduction-wrapper .other-item {
        margin-top: 4rem;
        margin-right: 8rem;
    }
    .introduction-img {
        width: 100%;
        height: auto;
        aspect-ratio: 80 / 40.625; /* 保持原始宽高比 */
    }
    /* Mobile header - not sticky */
    .header {
        position: relative !important;
        top: auto !important;
        left: auto !important;
        width: 100% !important;
        height: 15rem;
        padding: 0 10rem;
        background-color: #fff;
        z-index: 1000;
    }
    .logo {
        width: 28rem;
        height: auto;
        aspect-ratio: 9.5 / 2.25; /* 保持原始宽高比 */
        background-image: url(../img/logo_dark.png);
    }
    .menu-toggle { 
        display: block; 
        color: #000; 
    }
    /* prepare dropdown for animation */
    .menu {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        padding: 0.75rem 1rem 1rem;
        box-shadow: 0 8px 20px rgba(0,0,0,0.12);
        z-index: 999;
        visibility: hidden;
        opacity: 0;
        transform: translateY(-8px);
        max-height: 0;
        overflow: hidden;
        pointer-events: none;
        transition: opacity .25s ease, transform .25s ease, max-height .35s ease;
    }
    .header.sticky .menu-toggle { 
        color: #000; 
    }

    /* dropdown panel */
    .header.mobile-open .menu {
        visibility: visible;
        opacity: 1;
        transform: translateY(0);
        max-height: 70vh;
        pointer-events: auto;
    }
    .header.mobile-open .menu .menu-item {
        color: #000;
        padding: 4rem 0;
        font-size: 5rem;
    }

    /* hamburger to close animation */
    .header.mobile-open .menu-toggle:before {
        top: 50%;
        transform: translateY(-50%) rotate(45deg);
        transition: transform .25s ease, top .25s ease;
    }
    .header.mobile-open .menu-toggle:after {
        bottom: auto;
        top: 50%;
        transform: translateY(-50%) rotate(-45deg);
        transition: transform .25s ease, top .25s ease;
    }
    .header.mobile-open .menu-toggle i {
        opacity: 0;
        transition: opacity .2s ease;
    }
    .new-banner .text {
        transform: scale(1.8);
    }
    .core-wrapper .core-wrapper-bg {
        display: none;
    }
    .core-wrapper .core-title {
        font-size: 6.25rem;
        color: #000;
    }
    .core-wrapper .core-list {
        display: flex;
        flex-direction: column;
        margin-top: 6.25rem;
        padding: 0 5rem;
        box-sizing: border-box;
    }
    .core-wrapper .core-item {
        width: 100%;
        height: auto;
        margin-bottom: 2.5rem;
    }
    .core-wrapper .core-item .core-item-title {
        font-size: 5rem;
        line-height: 7.25rem;
    }
    .core-wrapper .core-item .core-item-desc {
        font-size: 3.125rem;
        line-height: 7.25rem;
        margin-top: 2rem;
    }
    /* Hide consult wrapper on mobile */
    .consult-wrapper {
        display: none;
    }
    
    /* 移动端弹窗样式 */
    .modal-content {
        width: 55%;
        max-width: none;
        height: auto;
        min-height: 25rem;
        flex-direction: column;
        box-sizing: content-box;
    }
    
    .modal-left {
        width: 100%;
        padding: 10rem 0 5rem;
    }
    
    .modal-logo {
        font-size: 1.5rem;
        margin-bottom: 1rem;
        display: none;
    }
    .modal-close {
        display: none;
    }
    
    .modal-qr {
        width: 45rem;
        height: 45rem;
        margin-bottom: 2rem;
    }
    
    .modal-qr-text {
        font-size: 4rem;
    }
    
    .modal-right {
        width: 100%;
        padding: 5rem;
    }
    .modal-section:last-child {
        margin-bottom: 0;
    }
    .modal-section-title {
        font-size: 4rem;
    }
    
    .modal-phone-number,
    .modal-qq-number {
        font-size: 5rem;
    }
    
    /* KPI wrapper mobile adaptation */
    .kpi-wrapper .kpi-title {
        font-size: 6.25rem;
        padding: 0 2rem;
        text-align: center;
    }
    .kpi-wrapper .kpi-list {
        margin-top: 6.25rem;
        padding: 0 2rem;
        box-sizing: border-box;
    }
    .kpi-wrapper .kpi-item {
        position: relative;
        margin-bottom: 3rem;
        border-radius: 1rem;
        overflow: hidden;
    }
    .kpi-wrapper .kpi-item .img {
        width: 30rem !important;
        height: 30rem !important;
        border-radius: 1rem;
    }
    /* .kpi-wrapper .kpi-item .img::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 1;
    } */
    /* .kpi-wrapper .kpi-item .kpi-item-text {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        z-index: 2;
        text-align: center;
        padding: 0 2rem;
        box-sizing: border-box;
        width: 100%;
    } */
    .kpi-wrapper .kpi-item .kpi-item-title {
        font-size: 5rem;
        line-height: 7rem;
        margin-bottom: 2rem;
    }
    .kpi-wrapper .kpi-item .kpi-item-desc {
        font-size: 3.125rem;
        line-height: 5rem;
    }
}