* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-width: auto;
    width: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

a, button {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

/* ================== Header ================= */
header {
    float: left;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    padding: 20px 0;
    z-index: 999999;
    transition: all .4s ease;
    background: rgba(255,255,255);
}

header.sticky {
    position: fixed;
    top: 0;
    left: 0;
    box-shadow: 0 0 40px rgba(0,0,0,0.1);
}

.slideInDown {
    animation-name: slideInDown;
}

.animated {
    animation-duration: 1s;
    animation-fill-mode: both;
}

@keyframes slideInDown {
    from {
        transform: translate3d(0, -100%, 0);
        visibility: visible;
    }
    to {
        transform: translate3d(0, 0, 0);
    }
}

header>div {
    max-width: 1500px;
    margin: 0 auto;
    height: 50px;
    padding: 0 50px;
    display: flex;
    align-items: center;
    user-select: none;
}

header>div .headerNav {
    display: flex;
    list-style: none;
    gap: 60px;
    margin-left: 140px;
}

header>div .headerNav a {
    color: #333;
    font-weight: 500;
}

header>div .headerNav a:hover {
    color: #3D87DA;
}

.menuToggle {
    display: none;
    cursor: pointer;
}

.menuToggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #3D87DA;
    margin: 5px auto;
    transition: background-color 0.3s ease;
}

.menuToggle.open span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.menuToggle.open span:nth-child(2) {
    opacity: 0;
}

.menuToggle.open span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

.headerNavDropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(255,255,255,.9);
    width: 100%;
    padding: 10px 0;
    z-index: 999;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.headerNavDropdown.open {
    display: block;
}

.headerNavDropdown a {
    display: block;
    padding: 10px 20px;
    color: #000000;
    text-decoration: none;
    text-align: center;
    font-weight: bolder;
}

header>div .toUse {
    margin-left: auto;
}

header>div .toUse .use {
    width: 90px;
    height: 40px;
    border: none;
    font-size: 16px;
    color: #fff;
    cursor: pointer;
    border-radius: 5px;
    background: #3D87DA;
}

/* ================== Section 1 ================= */
.s1 {
    position: relative;
    height: 890px;
    padding: 50px 50px;
    background-color: #FCFCFE;
    user-select: none;
}

.s1>.s1-1 {
    position: relative;
    max-width: 1400px;
    margin: auto;
    transform: translateY(-30px);
}

.s1>.s1-1>.s1-1-1 {
    position: absolute;
    top: 209px;
    font-size: 63px;
    font-weight: bolder;
    color: #311F09;
}

.s1>.s1-1>.s1-1-h3 {
    position: absolute;
    top: 295px;
    font-size: 18px;
    font-weight: bold;
    color: #311F09;
}

.s1>.s1-1>.s1-1-2 {
    position: absolute;
    top: 350px;
    font-size: 20px;
    color: #383838;
}

.s1>.s1-1>.s1-1-3 {
    position: absolute;
    top: 500px;
    font-size: 20px;
    color: #383838;
}

.s1>.s1-1>.s1-1-3 .useWeb {
    width: 464px;
    height: 74px;
    border: none;
    color: #fff;
    font-size: 20px;
    border-radius: 162px;
    background: #04BAAD;
    cursor: pointer;
    transition: all 0.3s ease;
}

.s1>.s1-1>.s1-1-3 .useWeb:hover {
    background: #03a89c;
    box-shadow: 0 4px 15px rgba(4, 186, 173, 0.4);
}

.s1>.s1-1 .s1-1-4 {
    position: absolute;
    left: 600px;
    top: 160px;
    height: 600px;
    width: 800px;
}

.s1>.s1-1 .s1-1-4>img {
    border-radius: 8px;
    width: 100%;
    transition: opacity 1s ease-in-out;
}

.extInstall {
    position: absolute;
    width: max-content;
    margin: 0 auto;
    left: 0;
    right: 0;
    bottom: 120px;
    display: flex;
    gap: 30px;
}

.extInstall>a {
    padding: 10px 20px;
    border-radius: 120px;
    color: #fff;
    display: flex;
    width: 180px;
    justify-content: center;
    align-items: center;
    background: #4c4f54;
    transition: all .4s;
    text-decoration: none;
}

.extInstall>a>span {
    font-size: 14px;
}

.extInstall>a>img {
    width: 25px;
    height: 25px;
    margin-right: 6px;
}

.extInstall>a:hover {
    box-shadow: 0 4px 5px rgba(0,0,0,0.1);
    background: #838383;
}

/* ================== Section 2 ================= */
.s2 {
    background-color: rgba(236, 241, 247);
    height: 900px;
    width: 100%;
    user-select: none;
}

.s2>.s2-1 {
    position: relative;
    max-width: auto;
    margin: auto;
}

.s2>.s2-1>h2 {
    padding-top: 80px;
    font-size: 66px;
    font-weight: 400;
    text-align: center;
}

.s2>.s2-1 .s2-1-1 {
    margin: auto;
    margin-top: 40px;
    max-width: 1000px;
}

.s2>.s2-1 .s2-1-1>p {
    text-align: center;
    font-size: 20px;
    font-weight: 400;
    color: #383838;
}

.s2>.s2-1 .s2-1-2 {
    margin: 100px auto;
    max-width: 1000px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.s2>.s2-1 .s2-1-2>div {
    border-radius: 10px;
    height: auto;
    background-color: #fff;
}

.s2>.s2-1 .s2-1-3 {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.s2>.s2-1 .s2-1-3 .vertical-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-right: 20px;
    margin-left: 10px;
}

.s2>.s2-1 .s2-1-3 .vertical-container >img {
    margin-top: 20px;
    width: 100px;
    height: 100px;
}

.s2>.s2-1 .s2-1-3 .s2-1-4 {
    margin-top: 20px;
    font-size: 18px;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
}

.s2>.s2-1 .s2-1-3 .s2-1-5 {
    padding: 15px;
    font-size: 16px;
    line-height: 25px;
    color: #67687B;
}

/* ================== Section 3 ================= */
.s3 {
    width: 100%;
    height: 650px;
    overflow: hidden;
    position: relative;
    background-color: #FCFCFE;
}

.s3>.s3-1 {
    position: relative;
    max-width: 1400px;
    margin: auto;
}

.s3>.s3-1>h2 {
    padding-top: 40px;
    font-size: 66px;
    font-weight: 400;
    text-align: center;
    color: #253647;
}

.s3>.s3-1 .s3-1-1 {
    margin: auto;
    margin-top: 40px;
    max-width: 1000px;
    margin-bottom: 40px;
}

.s3>.s3-1 .s3-1-1>p {
    text-align: center;
    font-size: 20px;
    font-weight: 400;
    color: #383838;
}

.s3-scroll-wrapper {
    display: flex;
    justify-content: center;
    width: 100%;
    overflow: hidden;
    height: 360px;
}

.s3-images {
    display: flex;
    height: 100%;
    animation: rolling 25s linear infinite forwards;
    animation-play-state: running;
    margin: 0 auto;
    align-items: center;
}

.s3-images:hover {
    animation-play-state: paused;
}

.s3-images img {
    flex: 0 0 auto;
    margin-right: 5px;
    box-shadow: 4px 4px 10px rgba(0,0,0,0.2);
    border-radius: 16px;
    width: 670px;
    height: 320px;
    object-fit: contain;
}

@keyframes rolling {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ================== Section 4 ================= */
.s4 {
    height: 700px;
    padding: 50px 50px;
    background-color: rgba(236, 241, 247);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.s4-content {
    display: flex;
    flex-direction: row;
    max-width: 1400px;
    margin-bottom: 80px;
}

.s4-image {
    flex: 1;
    margin-right: 300px;
}

.s4-image img {
    border-radius: 8px;
    max-width: 130%;
    height: auto;
}

.s4-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.s4-text h1 {
    font-size: 63px;
    font-weight: bolder;
    color: #311F09;
}

.s4-text h3 {
    font-size: 18px;
    font-weight: bold;
    color: #311F09;
    margin-bottom: 30px;
}

.s4-text p {
    font-size: 20px;
    color: #383838;
}

.s4-footer-text {
    font-size: 14px;
    color: #333;
}

.s4-footer-text a:hover {
    text-decoration: underline;
}

/* ================== Footer ================= */
footer {
    position: relative;
    width: 100%;
    background-color: #0B1024;
    color: #fff;
}

footer>div {
    position: relative;
    max-width: 1400px;
    margin: auto;
    padding: 30px 0;
}

footer>div .helpfulLink {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
}

footer>div .helpfulLink a,
footer>div .helpfulLink span {
    color: rgba(255,255,255,0.8);
}

footer>div .helpfulLink a:hover {
    color: #3D87DA;
}

footer>div .friendLink {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
}

footer>div .friendLink span,
footer>div .friendLink a {
    color: rgba(255,255,255,0.6);
}

footer>div .friendLink a:hover {
    color: #3D87DA;
}

footer>div .line {
    width: 80%;
    height: 3px;
    margin: 30px auto 20px;
    border-radius: 5px;
    background-color: #ffffff13;
}

/* ================== Responsive ================= */
@media screen and (max-width: 768px) {
    body {
        min-width: auto;
    }

    header {
        width: 100%;
        min-width: auto;
        padding: 10px 20px;
    }

    header>div {
        max-width: 100%;
        padding: 0 0px;
        height: auto;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    header>div .headerNav {
        display: none;
        list-style: none;
        gap: 20px;
        margin: 0;
    }

    .menuToggle {
        display: block;
    }

    header > div .toUse {
        display: none;
    }

    header > div .toUse .use {
        width: auto;
        height: 40px;
        font-size: 14px;
        padding: 0 15px;
        border-radius: 5px;
    }

    .s1 {
        height: auto;
        padding: 20px 5px;
        background-size: cover;
        background-position: center;
    }

    .s1>.s1-1 {
        position: static;
        min-width: auto;
        transform: none;
        text-align: center;
        margin-top: 100px;
    }

    .s1>.s1-1>.s1-1-1 {
        position: static;
        font-size: 40px;
    }

    .s1>.s1-1>.s1-1-h3 {
        position: static;
        font-size: 16px;
        padding-bottom: 25px;
    }

    .s1>.s1-1>.s1-1-2 {
        position: static;
        font-size: 14px;
        padding-bottom: 40px;
    }

    .s1>.s1-1>.s1-1-3 {
        position: static;
        font-size: 16px;
    }

    .s1>.s1-1>.s1-1-3 .useWeb {
        width: 300px;
        height: 50px;
        font-size: 16px;
    }

    .s1 > .s1-1 .s1-1-4 {
        position: static;
        height: auto;
        width: 100%;
        margin-top: 40px;
    }

    .s1 > .s1-1 .s1-1-4 > img {
        border-radius: 8px;
        width: 100%;
        height: auto;
        transition: opacity 1s ease-in-out;
    }

    .extInstall {
        position: static;
        flex-direction: column;
        align-items: center;
        margin-top: 20px;
        margin-bottom: 20px;
        gap: 20px;
        bottom: 60px;
    }

    .extInstall > a {
        width: 100%;
        padding: 10px 60px;
        margin-bottom: 0px;
    }

    .s2 {
        height: auto;
        padding: 20px 5px;
    }

    .s2>.s2-1 {
        position: static;
        max-width: auto;
        margin: auto;
    }

    .s2>.s2-1>h2 {
        padding-top: 50px;
        font-size: 40px;
    }

    .s2>.s2-1 .s2-1-1>p {
        font-size: 16px;
    }

    .s2>.s2-1 .s2-1-2 {
        margin: 50px 10px;
        grid-template-columns: none;
        grid-template-rows: repeat(2, 1fr);
        gap: 20px;
    }

    .s2>.s2-1 .s2-1-2>div {
        height: auto;
    }

    .s2>.s2-1 .s2-1-3 {
        display: flex;
        flex-direction: row;
        align-items: flex-start;
    }

    .s2>.s2-1 .s2-1-3 .vertical-container >img {
        margin-top: 10px;
    }

    .s2>.s2-1 .s2-1-3 .s2-1-4 {
        font-size: 18px;
        font-family: 'Poppins';
        font-weight: 600;
    }

    .s2>.s2-1 .s2-1-3 .s2-1-5 {
        padding: 15px 0;
        font-size: 16px;
        line-height: 25px;
        color: #67687B;
        flex: 1;
        align-self: center;
        margin-right: 10px;
    }

    .s3 {
        height: auto;
        padding: 20px 5px;
    }

    .s3>.s3-1 {
        position: static;
        max-width: auto;
        margin: auto;
    }

    .s3>.s3-1>h2 {
        font-size: 40px;
    }

    .s3>.s3-1 .s3-1-1>p {
        font-size: 16px;
    }

    .s3-scroll-wrapper {
        height: 180px;
    }

    .s3-images {
        height: 100%;
        margin-bottom: 30px;
        animation: rollingMobile 15s linear infinite forwards;
    }

    .s3-images img {
        margin-right: 10px;
        width: 280px;
        height: auto;
        max-height: 150px;
    }

    @keyframes rollingMobile {
        0% { transform: translateX(0); }
        100% { transform: translateX(-50%); }
    }

    .s4 {
        height: auto;
        padding: 50px 5px;
    }

    .s4-content {
        flex-direction: column;
        margin-right: 0;
        max-width: auto;
        margin-bottom: 30px;
    }

    .s4-image {
        margin-right: 0;
    }

    .s4-image img {
        max-width: 100%;
    }

    .s4-text {
        margin-top: 20px;
        align-self: center;
        text-align: center;
    }

    .s4-text h1 {
        font-size: 40px;
    }

    .s4-text h3 {
        font-size: 16px;
    }

    .s4-text p {
        font-size: 16px;
    }

    .s4-footer-text {
        font-size: 12px;
    }

    footer>div .helpfulLink {
        font-size: 12px;
    }

    footer>div .friendLink {
        font-size: 12px;
    }
}

/* ================== Privacy Page ================= */
.privacy-page header {
    position: relative;
    float: none;
    padding: 20px 50px;
    background: rgba(255,255,255);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.privacy-page header .logo {
    display: flex;
    align-items: center;
}

.privacy-page header .logo h1 {
    font-size: 24px;
    color: #253647;
    margin-right: 10px;
}

.privacy-page header .logo .tagline {
    font-size: 14px;
    color: #999;
}

.privacy-page main {
    padding: 60px 20px;
    max-width: 900px;
    margin: 0 auto;
    min-height: calc(100vh - 200px);
}

.privacy-page .content-wrapper {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    padding: 40px;
}

.privacy-page .policy-content h1 {
    font-size: 32px;
    color: #253647;
    margin-bottom: 10px;
    text-align: center;
}

.privacy-page .policy-content .update-date {
    text-align: center;
    color: #999;
    font-size: 14px;
    margin-bottom: 40px;
}

.privacy-page .policy-section {
    margin-bottom: 30px;
}

.privacy-page .policy-section h2 {
    font-size: 20px;
    color: #253647;
    margin-bottom: 15px;
    padding-left: 15px;
    border-left: 4px solid #3D87DA;
}

.privacy-page .policy-section p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
}

.privacy-page .policy-section ul {
    padding-left: 30px;
    margin-bottom: 15px;
}

.privacy-page .policy-section li {
    font-size: 16px;
    color: #666;
    line-height: 2;
    margin-bottom: 8px;
}

.privacy-page .policy-section a {
    color: #3D87DA;
    text-decoration: none;
}

.privacy-page .policy-section a:hover {
    text-decoration: underline;
}

.privacy-page .actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid #eee;
}

.privacy-page .btn {
    padding: 12px 30px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s;
}

.privacy-page .btn.primary {
    background: #3D87DA;
    color: #fff;
}

.privacy-page .btn.primary:hover {
    background: #2d77ca;
}

.privacy-page .btn.secondary {
    background: #f5f5f5;
    color: #666;
    border: 1px solid #ddd;
}

.privacy-page .btn.secondary:hover {
    background: #eee;
}

.privacy-page footer {
    background: #253647;
    padding: 30px 20px;
    text-align: center;
}

.privacy-page footer-nav {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
}

.privacy-page footer-nav a {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
}

.privacy-page footer-nav a:hover {
    color: #fff;
}

.privacy-page footer p {
    color: rgba(255,255,255,0.5);
    font-size: 12px;
}

@media screen and (max-width: 768px) {
    .privacy-page header {
        padding: 15px 20px;
    }

    .privacy-page header .logo h1 {
        font-size: 20px;
    }

    .privacy-page main {
        padding: 30px 15px;
    }

    .privacy-page .content-wrapper {
        padding: 20px;
    }

    .privacy-page .policy-content h1 {
        font-size: 24px;
    }

    .privacy-page .policy-section h2 {
        font-size: 18px;
    }

    .privacy-page .policy-section p,
    .privacy-page .policy-section li {
        font-size: 14px;
    }

    .privacy-page .actions {
        flex-direction: column;
        align-items: center;
    }

    .privacy-page .btn {
        width: 100%;
        text-align: center;
    }
}