.navbar-expand-lg .navbar-nav .dropdown-menu {
    z-index: 1021;
}


.navbarMainContent .navbar-nav li:first-child {
    padding-top: .5rem;
    padding-bottom: .5rem;
    font-weight: 400;
}

.navbar-light .navbar-nav .nav-link {
    text-decoration: underline;
}


header {
    background: linear-gradient(270deg, #EAF4FF 0%, #C4E0FF 100%);
    padding-top: 60px;
    padding-bottom: 40px;
    text-align: center;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

header h1 {
    color: #141414;
    text-align: center;
    font-size: 48px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 22px;
}

header h2 {
    color: #00B7E9;
    text-align: center;
    font-size: 28px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 30px;
}

header h3 {
    color: #666;
    text-align: center;
    font-size: 17px;
    font-style: normal;
    font-weight: 400;
    line-height: 30px;
    max-width: 630px;
    margin-bottom: 40px;
}

header a {
    display: inline-flex;
    padding: 24px 30px;
    justify-content: center;
    align-items: center;
    gap: 10px;
    border-radius: 12px;
    background: #007AFF;
    box-shadow: 0 6px 30px 0 rgba(0, 122, 255, 0.44);
    color: #FFF;
    font-size: 22px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    transition: all 0.3s ease-in-out;
}

header a:hover {
    box-shadow: 0 6px 30px 0 rgba(0, 122, 255, 0.80);
    color: #fff;
    text-decoration: none;
}

header a svg {
    width: 20px;
    height: 20px;
}

.app-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-bottom: 65px;
}

.rating {
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: center;
}

.stars {
    display: flex;
    gap: 2px;
}

.star {
    color: #FA0;
    font-size: 13px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
}

.rating-text {
    color: #FA0;
    font-size: 15px;
    font-style: normal;
    font-weight: 700;
    line-height: 24px;
    /* 160% */
    margin-right: 2px;
}

.rating-desc {
    color: #333;
    font-size: 15px;
    font-style: normal;
    font-weight: 400;
    line-height: 24px;
    /* 160% */
}

.version-info {
    display: flex;
    gap: 20px;
    align-items: center;
}

.version,
.size {
    color: #333;
    text-align: center;
    font-size: 15px;
    font-style: normal;
    font-weight: 700;
    line-height: 24px;
    /* 160% */
}

.header-function {
    gap: 70px;
    margin-bottom: 40px;
}

.header-function span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.header-step {
    border-radius: 30px;
    background: #FFF;
    width: 1360px;
}

.header-step .row {
    margin-left: 0;
    margin-right: 0;
}

@media (max-width: 1380px) {
    .header-step {
        width: 100%;
    }
}

.header-step {
    padding-top: 70px;
    text-align: center;
}

.header-step-title {
    text-align: center;
    color: #161C2D;
    font-size: 46px;
    font-style: normal;
    font-weight: 600;
    line-height: 50px;
    /* 108.696% */
    margin-bottom: 20px;
}

.header-step-list {
    margin-top: 67px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 50px;
}

.header-step-arrow {
    display: flex;
    justify-content: center;
    flex-direction: column;
    gap: 34px;
    margin-right: 30px;
}

.arrow-top {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    background: #E8EDF1;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.arrow-down {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    background: #E8EDF1;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.header-step-list-left {
    gap: 20px;
    display: flex;
    justify-content: center;
    flex-direction: column;
    width: 35%;
}

.header-step-list-left-item {
    display: flex;
    align-items: center;
    justify-content: start;
    gap: 16px;
    color: #141414;
    font-size: 17px;
    font-style: normal;
    font-weight: 700;
    line-height: 30px;
    /* 176.471% */
    border-radius: 28px;
    background: #E8EDF1;
    width: fit-content;
    min-width: 120px;
    max-width: 422px;
    height: 56px;
    flex-shrink: 0;
    padding-left: 20px;
    padding-right: 20px;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transform-origin: 0 50%;
    /* 左起点缩放 */
    will-change: transform, opacity;
    /* GPU加速 */
    transform: scaleX(1) scaleY(1);
    opacity: 1;
}

.header-step-list-left-item .short-text {
    font-weight: 600;
    display: inline;
    opacity: 1;
    white-space: nowrap;
    transition: opacity 0.8s ease;
    /* 文字过渡比div过渡更慢 */
}

.header-step-list-left-item .long-text {
    font-weight: 400;
    display: none;
    opacity: 0;
    transition: opacity 0.8s ease;
    /* 文字过渡比div过渡更慢 */
}


.header-step-list-left-item.hiding {
    transform: scaleX(1) scaleY(1);
    opacity: 0;
}

.header-step-list-left-item-show {
    display: flex;
    align-items: center;
    text-align: left;
    color: #161C2D;
    font-size: 17px;
    font-style: normal;
    line-height: normal;
    border-radius: 28px;
    background: #E8EDF1;
    width: fit-content;
    min-width: 300px;
    max-width: 422px;
    height: 150px;
    flex-shrink: 0;
    padding: 30px 37px 30px 28px;
    cursor: pointer;
    overflow: hidden;
    transition: width 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94), height 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transform-origin: 0 50%;
    /* 左起点缩放 */
    will-change: transform, opacity;
    /* GPU加速 */
    opacity: 0;
}

.header-step-list-left-item-show .short-text {
    display: none;
    opacity: 0;
    white-space: nowrap;
    transition: opacity 0.8s ease;
    /* 文字过渡比div过渡更慢 */
}

.header-step-list-left-item-show .long-text {
    display: block;
    opacity: 0;
    transition: opacity 0.8s ease 0.6s;
    /* 文字过渡比div过渡更慢，延后显示 */
    will-change: opacity;
    /* GPU加速 */
}

.header-step-list-left-item-show .long-text p {
    color: #666;
    font-size: 17px;
    font-style: normal;
    font-weight: 400;
    line-height: 30px;
}

.header-step-list-left-item-show .long-text b {
    color: #141414;
    font-size: 17px;
    font-style: normal;
    font-weight: 700;
    line-height: 30px;
    /* 176.471% */
}

.header-step-list-left-item-show svg {
    display: none;
    opacity: 0;
    transition: opacity 0.8s ease;
    /* 文字过渡比div过渡更慢 */
}

.header-step-list-left-item-show.showing {
    transform: scaleX(1) scaleY(1);
    opacity: 1;
}

.header-step-list-left-item-show.showing .long-text {
    width: 357px;
    opacity: 1;
}

.header-step-list-right {
    position: relative;
    width: 739px;
    height: 448px;
    flex-shrink: 0;
    overflow: hidden;
}

.header-step-list-right img {
    position: absolute;
    top: 0;
    left: 0;
    width: 739px;
    height: 448px;
    flex-shrink: 0;
    border-radius: 20px;
    /* filter: drop-shadow(0 12px 32px rgba(0, 0, 0, 0.40)); */
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transform: translateX(0);
    opacity: 1;
}

.header-step-list-right img.slide-out-left {
    transform: translateX(-150px) !important;
    opacity: 0 !important;
}

.header-step-list-right img.slide-in-right {
    transform: translateX(150px) !important;
    opacity: 0 !important;
}

.header-step-list-right img.slide-in-active {
    transform: translateX(0) !important;
    opacity: 1 !important;
}

.header-step a {
    margin-top: 59px;
    margin-bottom: 56px;
}

.need h2 {
    color: #141414;
    text-align: center;
    font-size: 48px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 60px;
}

.need {
    display: flex;
    align-items: center;
    flex-direction: column;
    width: 100%;
    padding-top: 100px;
    padding-bottom: 100px;
}

.need-content {
    display: flex;
    justify-content: space-between;
    max-width: 1220px;
}

.need-content-item {
    border-radius: 30px;
    background: #F7F7F7;
    width: 380px;
    height: 423px;
    flex-shrink: 0;
    padding: 46px 24px 68px 46px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.need-content-item:hover {
    box-shadow: 0 12px 24px 0 rgba(0, 0, 0, 0.08);
    transform: translateY(-20px);
}

.need-icon {
    margin-bottom: 40px;
}

.need-content-item h3 {
    color: #141414;
    font-family: Inter;
    font-size: 22px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 26px;
}

.need-content-item p {
    color: #666;
    font-size: 17px;
    font-style: normal;
    font-weight: 400;
    line-height: 36px;
    /* 211.765% */
    text-align: left;
    width: 288px;
}

.need-content-item .highlight {
    color: #00A7D6;
    font-size: 17px;
    font-style: normal;
    font-weight: 700;
    line-height: 36px;
}

.relief {
    background: linear-gradient(270deg, #EAF4FF 0%, #C4E0FF 100%);
    position: relative;
    padding-top: 101px;
    padding-bottom: 93px;
    overflow: hidden;
}

.relief-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 154px;
}

.relief-left {
    flex: 0 0 auto;
}

.relief-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.relief-icon img {
    width: 160px;
    height: 160px;
}

.relief-icon::before {
    content: '';
    position: absolute;
    width: 593px;
    height: 593px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
}

.relief-icon::after {
    content: '';
    position: absolute;
    width: 281px;
    height: 281px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
}

.relief-right {}

.relief-right h2 {
    color: #141414;
    font-size: 36px;
    font-style: normal;
    font-weight: 700;
    line-height: 44px;
    /* 122.222% */
    margin-bottom: 30px;
}

.relief-right .highlight {
    color: #00B7E9;
}

.relief-features {
    list-style: none;
    padding: 0;
    margin: 0 0 36px 0;
}

.relief-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #333;
    font-size: 17px;
    font-style: normal;
    font-weight: 400;
    line-height: 36px;
    /* 211.765% */
}

.relief-features li:last-child {
    margin-bottom: 0;
}

.relief-download {
    margin-top: 40px;
}

.user-download {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.download-btn {
    gap: 10px;
    display: inline-flex;
    padding: 24px 30px;
    justify-content: center;
    align-items: center;
    color: #FFF;
    font-size: 22px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    border-radius: 12px;
    background: #007AFF;
    box-shadow: 0 6px 30px 0 rgba(0, 122, 255, 0.44);
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.download-btn:hover {
    box-shadow: 0 8px 30px 0 rgba(0, 122, 255, 0.44);
    text-decoration: none;
    color: white;
}

/* 小屏幕响应式样式 */
@media (max-width: 768px) {
    .relief-content {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }

    .relief-left {
        width: 100%;
    }

    .relief-right {
        width: 100%;
    }

    .relief-right h2 {
        font-size: 28px;
        line-height: 36px;
        margin-bottom: 20px;
    }

    .relief-features li {
        font-size: 16px;
        line-height: 32px;
        justify-content: center;
    }


}

.user-respect {
    flex-shrink: 0;
    background-color: #FFF;
    padding: 100px 0;
}

.user-respect h2 {
    color: #141414;
    text-align: center;
    font-size: 48px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 20px;
}

.user-respect h3 {
    color: #666;
    text-align: center;
    font-size: 17px;
    font-style: normal;
    font-weight: 400;
    line-height: 30px;
    /* 176.471% */
    margin-bottom: 56px;
}

.user-content {
    width: 1028px;
    /* 固定容器宽度：显示两个卡片 */
    height: 268px;
    overflow: hidden;
    position: relative;
}

.user-slider {
    display: flex;
    align-items: center;
    gap: 30px;
    width: 1557px;
    /* 三个卡片的总宽度：499*3 + 30*2 */
    transition: transform 0.5s ease;
    transform: translateX(0);
}

.user-slider.slide-left {
    transform: translateX(-529px);
    /* 向左滑动一个卡片宽度 + 间距 */
}

.user-respect .user {
    width: 499px;
    height: 268px;
    flex-shrink: 0;
    border-radius: 10px;
    background: #f7f7f7;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.user-respect .user p {
    color: #333;
    font-size: 16px;
    font-weight: 400;
    margin: 0;
    text-align: left;
    line-height: 160%;
    /* 25.6px */
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 30px;
}

.user-info img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.user-name {
    color: #000000;
    font-size: 16px;
    font-weight: 600;
}

.user-title {
    color: #909B99;
    font-size: 14px;
    font-weight: 400;
}

/* 用户反馈导航按钮样式 */
.user-feedback-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    position: relative;
}

.nav-btn {
    border: none;
    background: none;
    padding: 0;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
}

.nav-btn:hover {
    transform: scale(1.05);
    border: none;
}

.nav-btn:active {
    transform: scale(0.95);
    border: none;
}

.nav-btn:focus {
    outline: none;
    border: none;
}

.nav-btn svg {
    width: 36px;
    height: 36px;
}

/* Header响应式设计 */
@media (max-width: 768px) {
    header {
        padding: 60px 15px;
        min-height: 90vh;
    }

    header h1 {
        font-size: 36px;
        margin-bottom: 15px;
    }

    header h2 {
        font-size: 20px;
        margin-bottom: 25px;
    }

    header p {
        font-size: 16px;
        margin-bottom: 30px;
    }

    header a {
        font-size: 16px;
        padding: 14px 28px;
    }

    .app-info {
        gap: 12px;
        margin-bottom: 30px;
    }

    .rating {
        flex-direction: column;
        gap: 8px;
    }

    .rating-text {
        font-size: 16px;
    }

    .rating-desc {
        font-size: 13px;
        text-align: center;
    }

    .version-info {
        gap: 15px;
    }

    .version,
    .size {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    header {
        padding: 40px 10px;
    }

    header h1 {
        font-size: 28px;
    }

    header h2 {
        font-size: 18px;
    }

    header p {
        font-size: 15px;
    }

    header a {
        font-size: 15px;
        padding: 12px 24px;
    }

    .stars .star {
        font-size: 18px;
    }
}

/* 其他页面样式 */
.tech {
    padding-bottom: 100px;
}

.tech h2 {
    color: #141414;
    text-align: center;
    font-size: 48px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 60px;
}

.tech-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
    max-width: 1028px;
    margin: 0 auto;
}

.tech-item {
    width: 100%;
    display: flex;
    flex-wrap: nowrap;
    align-items: flex-start;
}

.tech-left {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 30px;
}

.tech-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
}

.tech-item h3 {
    color: #00B7E9;
    font-size: 20px;
    font-weight: 600;
    margin: 0;
}

.tech-right {
    display: flex;
    gap: 60px;
}

.tech-column {
    flex: 1;
}

.tech-list {
    padding: 0;
    margin: 0;
}

.tech-list li {
    list-style-type: disc;
}

.tech-list li {
    color: #666;
    font-size: 16px;
    font-weight: 400;
    line-height: 28px;
    padding: 8px 0;
    position: relative;
}

.tech-content hr {
    height: 1px;
    width: 100%;
    background: #E8E8E8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .tech {
        padding: 60px 0;
    }

    .tech h2 {
        font-size: 36px;
        margin-bottom: 40px;
    }

    .tech-content {
        gap: 40px;
    }

    .tech-columns {
        flex-direction: column;
        gap: 20px;
    }

    .tech-header {
        justify-content: center;
        text-align: center;
    }
}

.faq {
    background: #F2F2F2;
    padding: 100px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.faq h2 {
    color: #141414;
    font-family: Inter;
    font-size: 48px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 50px;
}

.faq-card {
    max-width: 940px;
    width: 100%;
    display: flex;
    flex-direction: column;
    padding: 26px 30px;
    align-items: flex-start;
    border-radius: 8px;
    background: var(--Background-bg-primary, #FFF);
    margin: 0 auto;
    /* cursor: pointer; */
    transition: all 0.3s ease;
    margin-bottom: 14px;
}

/* .faq-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
} */

.faq-card-question {
    color: #141414;
    font-size: 22px;
    font-style: normal;
    font-weight: 700;
    line-height: 120%;
    /* 26.4px */
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 14px;
}

.faq-card p {
    margin-bottom: 0;
    flex: 1;
}

.faq-card svg {
    min-width: 31px;
}

.faq-card-answer {
    color: #555;
    font-size: 17px;
    font-style: normal;
    font-weight: 400;
    line-height: 140%;
    /* 23.8px */
    width: 100%;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.faq-card.expanded .faq-card-answer {
    max-height: 1000px;
    opacity: 1;
    margin-top: 14px;
}

.faq-card-answer-content {
    flex: 1;
    max-width: 806px;
}

.faq-card-answer p:not(:last-child) {
    margin-bottom: 21px;
}

.faq-card-answer ol {
    counter-reset: item;
    padding-left: 0;
    margin: 0;
}

.faq-card-answer ol li {
    display: block;
    padding-left: 25px;
    position: relative;
}

.faq-card-answer ol li:not(:last-child) {
    margin-bottom: 21px;
}

.faq-card-answer ol li:before {
    content: counter(item) ".";
    counter-increment: item;
    position: absolute;
    left: 0;
    top: 0;
    color: #555;
    font-size: 17px;
}

.faq-card-show {
    width: 6px;
    height: 3px;
    background: #333;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.faq-card.expanded .faq-card-show {
    /* transform: rotate(-90deg); */
    width: 3px;
    height: 20px;
}

/* =========================================================
   Mobile & small-screen optimizations
   Target sections: header-step, need, user-respect, tech
   ========================================================= */
@media (max-width: 992px) {
  /* Header Step */
  .header-step {
    padding-top: 40px;
  }
  .header-step-title {
    font-size: 32px;
    line-height: 38px;
    text-align: center;
    margin-bottom: 24px;
  }
  .header-step-list {
    flex-direction: column;
    align-items: center;
    padding-left: 20px;
    padding-right: 20px;
    gap: 24px;
  }
  .header-step-arrow {
    flex-direction: row;
    gap: 14px;
    margin-right: 0;
  }
  .header-step-list-left {
    width: 100%;
    align-items: center;
  }
  .header-step-list-left-item,
  .header-step-list-left-item-show {
    max-width: 100%;
    height: auto;
  }
  .header-step-list-left-item-show .long-text {
    width: auto;
  }
  .header-step-list-right {
    width: 100%;
    height: auto;
  }
  .header-step-list-right img {
    width: 100%;
    height: auto;
    position: relative;
    left: auto;
    top: auto;
    transform: none;
  }
  .header-step a.btn-action {
    display: inline-flex;
    margin-top: 24px;
  }

  /* Need section */
  .need-content {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }
  .need-content-item {
    width: 100%;
    max-width: 640px;
    height: auto;
    align-items: center;
    padding: 24px;
  }
  .need-content-item p {
    width: auto;
    text-align: left;
  }

  /* User Respect (slider) */
  .user-feedback-container {
    gap: 20px;
  }
  .user-content {
    width: 100%;
    max-width: 100%;
    height: auto;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x;
  }
  .user-slider {
    width: max-content;
    gap: 16px;
    scroll-snap-type: x mandatory;
    transform: none;
  }
  .user-slider.slide-left {
    transform: none;
  }
  .user-respect .user {
    flex: 0 0 78%;
    width: 78%;
    max-width: 360px;
    /* height: auto; */
    scroll-snap-align: center;
  }
  .user-respect .user p {
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
  }
  .user-respect .prev-btn,
  .user-respect .next-btn {
    display: none;
  }

  /* Tech section */
  .tech-content {
    max-width: 100%;
    padding: 0 16px;
  }
  .tech-item {
    flex-direction: column;
  }
  .tech-left,
  .tech-right {
    width: 100%;
  }
  .tech-right {
    gap: 20px;
  }
  .tech-list li {
    font-size: 15px;
    line-height: 26px;
  }
}

@media (max-width: 576px) {
  /* Finer tweaks for very small devices */
  .header-step-title {
    font-size: 26px;
    line-height: 32px;
  }
  .header-step a.btn-action {
    margin-top: 20px;
  }
  .download-btn {
    font-size: 18px;
    padding: 16px 22px;
  }
  .need-content-item {
    padding: 20px;
  }
  .user-respect {
    padding: 60px 0;
  }
  .user-respect h2 {
    font-size: 32px;
  }
  .user-respect h3 {
    font-size: 16px;
    line-height: 26px;
  }
  .need h2,
  .tech h2,
  .faq h2 {
    font-size: 36px;
  }
}