/* ==================================================

Vietnam Payment Gateway
About Page
FinTech Premium Dark Style CSS

Optimized Version

================================================== */


/* ==========================
 全局基础
========================== */


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



html {
    scroll-behavior: smooth;
}



body {
    font-family: "Microsoft YaHei", Arial, sans-serif;
    background: radial-gradient( circle at 15% 15%, rgba(0,200,255,.12), transparent 30% ), radial-gradient( circle at 85% 85%, rgba(0,100,255,.12), transparent 35% ), #050b18;
    color: #d9e8ff;
    line-height: 1.8;
    overflow-x: hidden;
}




    body::before {
        content: "";
        position: fixed;
        width: 650px;
        height: 650px;
        top: -250px;
        left: -200px;
        background: radial-gradient( circle, rgba(0,200,255,.35), transparent 65% );
        filter: blur(20px);
        z-index: -1;
        animation: floatBg 10s infinite alternate;
    }




    body::after {
        content: "";
        position: fixed;
        inset: 0;
        background-image: linear-gradient( rgba(0,200,255,.04) 1px, transparent 1px ), linear-gradient( 90deg, rgba(0,200,255,.04) 1px, transparent 1px );
        background-size: 40px 40px;
        z-index: -2;
        animation: gridMove 20s linear infinite;
    }




@keyframes gridMove {


    from {
        background-position: 0 0;
    }


    to {
        background-position: 400px 400px;
    }
}




@keyframes floatBg {


    from {
        transform: translateY(0);
    }


    to {
        transform: translateY(60px);
    }
}





a {
    text-decoration: none;
    color: inherit;
}



img {
    max-width: 100%;
}




/* ==========================
 Header
========================== */


.header {
    height: 80px;
    width: 100%;
    padding: 0 8%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999;
    background: rgba(5,15,35,.75);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(0,200,255,.2);
    box-shadow: 0 10px 40px rgba(0,0,0,.3);
}




.logo {
    font-size: 30px;
    font-weight: 900;
    color: #fff;
    letter-spacing: 2px;
    text-shadow: 0 0 20px rgba(0,200,255,.5);
}



    .logo span {
        color: #00c8ff;
        animation: logoGlow 3s infinite alternate;
    }



@keyframes logoGlow {


    from {
        text-shadow: 0 0 5px #00c8ff;
    }


    to {
        text-shadow: 0 0 30px #00c8ff;
    }
}




nav {
    display: flex;
    gap: 45px;
}



    nav a {
        font-size: 16px;
        color: #dceaff;
        position: relative;
        transition: .3s;
    }




        nav a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -10px;
            width: 0;
            height: 2px;
            background: #00c8ff;
            box-shadow: 0 0 10px #00c8ff;
            transition: .35s;
        }





        nav a:hover,
        nav a.active {
            color: #00c8ff;
        }





            nav a:hover::after,
            nav a.active::after {
                width: 100%;
            }





.mobile-btn {
    display: none;
    font-size: 30px;
    color: #fff;
    cursor: pointer;
}





/* ==========================
 Hero Banner
========================== */



.about-banner {
    height: 760px;
    margin-top: 80px;
    padding: 0 10%;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient( 135deg, #020817, #071c3b, #003b68 );
}




    .about-banner::before {
        content: "";
        position: absolute;
        width: 750px;
        height: 750px;
        right: -250px;
        top: 50px;
        background: radial-gradient( circle, rgba(0,200,255,.4), transparent 65% );
        filter: blur(20px);
        animation: floatLight 8s infinite alternate;
    }




    .about-banner::after {
        content: "";
        position: absolute;
        width: 300px;
        height: 300px;
        left: 10%;
        bottom: 40px;
        background: radial-gradient( circle, rgba(0,200,255,.3), transparent 70% );
        filter: blur(30px);
    }




@keyframes floatLight {


    from {
        transform: translateY(0);
    }


    to {
        transform: translateY(-80px);
    }
}




.about-content {
    max-width: 900px;
    position: relative;
    z-index: 2;
}



    .about-content h1 {
        font-size: 56px;
        line-height: 1.25;
        font-weight: 900;
        margin-bottom: 35px;
        background: linear-gradient( 90deg, #fff, #00c8ff, #0078ff );
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-size: 300%;
        animation: titleFlow 6s linear infinite;
    }



@keyframes titleFlow {


    from {
        background-position: 0;
    }

    to {
        background-position: 300%;
    }
}




.about-content p {
    font-size: 19px;
    color: #c9dcf5;
    margin-bottom: 40px;
    max-width: 850px;
}




.about-content a,
.about-cta a {
    display: inline-block;
    padding: 16px 45px;
    border-radius: 50px;
    font-weight: bold;
    color: white;
    background: linear-gradient( 90deg, #008cff, #00d4ff );
    box-shadow: 0 0 30px rgba(0,180,255,.5);
    position: relative;
    overflow: hidden;
    transition: .35s;
}




    .about-content a:hover,
    .about-cta a:hover {
        transform: translateY(-6px);
        box-shadow: 0 0 50px rgba(0,220,255,.8);
    }




    .about-content a::before,
    .about-cta a::before {
        content: "";
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient( 120deg, transparent, rgba(255,255,255,.5), transparent );
        transition: .6s;
    }



    .about-content a:hover::before,
    .about-cta a:hover::before {
        left: 100%;
    }
/* ==================================================

 Section 公共区域

================================================== */



section {
    padding: 110px 8%;
    position: relative;
}




    section h2 {
        text-align: center;
        font-size: 40px;
        font-weight: 900;
        color: white;
        margin-bottom: 55px;
        letter-spacing: 1px;
    }



        section h2::after {
            content: "";
            display: block;
            width: 80px;
            height: 3px;
            margin: 20px auto 0;
            background: linear-gradient( 90deg, #008cff, #00d4ff );
            box-shadow: 0 0 20px #00c8ff;
        }




/* ==================================================

 About介绍模块

================================================== */



.about-intro {
    background: linear-gradient( 180deg, #071426, #050b18 );
}




    .about-intro p {
        max-width: 1050px;
        margin: 25px auto;
        text-align: center;
        font-size: 18px;
        color: #b9cce6;
    }




        .about-intro p strong {
            color: #00c8ff;
        }




/* ==================================================

 本地化能力 Local

================================================== */



.local {
    background: #071120;
}




.local-grid {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 35px;
}




    .local-grid div {
        position: relative;
        padding: 40px;
        border-radius: 25px;
        overflow: hidden;
        background: linear-gradient( 145deg, rgba(0,140,255,.15), rgba(255,255,255,.04) );
        border: 1px solid rgba(0,200,255,.2);
        backdrop-filter: blur(15px);
        transition: .4s;
    }




        .local-grid div::before {
            content: "";
            position: absolute;
            width: 160px;
            height: 160px;
            right: -80px;
            top: -80px;
            background: radial-gradient( circle, rgba(0,200,255,.35), transparent 70% );
            opacity: 0;
            transition: .4s;
        }




        .local-grid div:hover::before {
            opacity: 1;
        }




        .local-grid div:hover {
            transform: translateY(-12px);
            border-color: #00c8ff;
            box-shadow: 0 25px 60px rgba(0,170,255,.3);
        }




    .local-grid h3 {
        font-size: 24px;
        color: #00c8ff;
        margin-bottom: 15px;
    }




    .local-grid p {
        color: #c4d6ef;
        font-size: 16px;
    }







/* ==================================================

 支付解决方案

================================================== */



.solution {
    background: #050b18;
}





.solution-grid {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 25px;
}





    .solution-grid div {
        position: relative;
        overflow: hidden;
        padding: 38px;
        border-radius: 22px;
        background: linear-gradient( 145deg, rgba(0,120,255,.18), rgba(255,255,255,.03) );
        border: 1px solid rgba(0,180,255,.25);
        transition: .35s;
    }




        .solution-grid div::after {
            content: "";
            position: absolute;
            height: 2px;
            width: 0;
            left: 0;
            bottom: 0;
            background: #00c8ff;
            transition: .4s;
        }




        .solution-grid div:hover::after {
            width: 100%;
        }





        .solution-grid div:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 50px rgba(0,180,255,.25);
        }




    .solution-grid h3 {
        font-size: 23px;
        color: white;
        margin-bottom: 15px;
    }



    .solution-grid p {
        color: #b7cbe5;
    }







/* ==================================================

 企业价值理念

================================================== */



.values {
    background: linear-gradient( 135deg, #061a35, #020817 );
}





.value-grid {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 25px;
}




    .value-grid div {
        padding: 40px;
        border-radius: 22px;
        background: rgba(255,255,255,.06);
        border: 1px solid rgba(0,200,255,.18);
        transition: .35s;
    }




        .value-grid div:hover {
            transform: translateY(-10px);
            background: rgba(0,160,255,.12);
            box-shadow: 0 20px 50px rgba(0,180,255,.25);
        }




    .value-grid h3 {
        color: #00c8ff;
        font-size: 23px;
        margin-bottom: 15px;
    }




    .value-grid p {
        color: #d0dded;
    }







/* ==================================================

 数据展示模块

================================================== */


.stats {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 30px;
    margin-top: 60px;
}




.stat-box {
    text-align: center;
    padding: 40px;
    border-radius: 25px;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(0,200,255,.2);
    backdrop-filter: blur(15px);
}




    .stat-box h3 {
        font-size: 48px;
        color: #00c8ff;
        font-weight: 900;
    }




    .stat-box p {
        color: #c5d8ef;
    }





/* ==================================================

 FAQ

================================================== */



.faq {
    background: #071120;
}





.faq-box {
    max-width: 1000px;
    margin: 25px auto;
    padding: 35px;
    border-radius: 20px;
    background: linear-gradient( 145deg, rgba(0,120,255,.15), rgba(255,255,255,.03) );
    border-left: 4px solid #00c8ff;
    transition: .35s;
}




    .faq-box:hover {
        transform: translateX(10px);
        box-shadow: 0 20px 40px rgba(0,180,255,.2);
    }




    .faq-box h3 {
        font-size: 22px;
        color: white;
        margin-bottom: 12px;
    }




    .faq-box p {
        color: #c3d6ed;
    }






/* ==================================================

 CTA 合作咨询

================================================== */



.about-cta {
    text-align: center;
    background: linear-gradient( 135deg, #003c66, #001529 );
    overflow: hidden;
}





    .about-cta::before {
        content: "";
        position: absolute;
        width: 500px;
        height: 500px;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
        background: radial-gradient( circle, rgba(0,200,255,.25), transparent 70% );
        filter: blur(30px);
    }




    .about-cta h2 {
        position: relative;
        font-size: 44px;
        color: white;
    }




    .about-cta p {
        position: relative;
        max-width: 900px;
        margin: 0 auto 40px;
        font-size: 18px;
        color: #d7e7fa;
    }




    .about-cta a {
        position: relative;
    }





/* ==================================================

 Footer

================================================== */



footer {
    background: #010511;
    padding: 70px 20px;
    text-align: center;
    border-top: 1px solid rgba(0,200,255,.15);
}





    footer h3 {
        font-size: 30px;
        color: white;
        margin-bottom: 15px;
    }



    footer p {
        color: #8fa9c7;
    }




.footer-link {
    display: flex;
    justify-content: center;
    gap: 35px;
    margin: 35px 0;
}




    .footer-link a {
        transition: .3s;
    }



        .footer-link a:hover {
            color: #00d8ff;
            text-shadow: 0 0 15px #00d8ff;
        }





/* ==================================================

 Telegram悬浮按钮

================================================== */



.telegram {
    position: fixed;
    right: 30px;
    bottom: 30px;
    padding: 15px 30px;
    border-radius: 50px;
    background: #0088cc;
    color: white;
    font-weight: bold;
    z-index: 999;
    box-shadow: 0 0 30px rgba(0,150,255,.6);
    animation: telegramPulse 2s infinite;
}




@keyframes telegramPulse {


    0% {
        box-shadow: 0 0 0 0 rgba(0,136,204,.7);
    }



    70% {
        box-shadow: 0 0 0 25px rgba(0,136,204,0);
    }



    100% {
        box-shadow: 0 0 0 0 rgba(0,136,204,0);
    }
}






/* ==================================================

 滚动动画

================================================== */



.reveal {
    opacity: 0;
    transform: translateY(60px);
    transition: .8s;
}




    .reveal.show {
        opacity: 1;
        transform: none;
    }



.reveal-left {
    opacity: 0;
    transform: translateX(-60px);
    transition: .8s;
}




.reveal-right {
    opacity: 0;
    transform: translateX(60px);
    transition: .8s;
}




    .reveal-left.show,
    .reveal-right.show {
        opacity: 1;
        transform: none;
    }

/* ==================================================

 Responsive Design
 Mobile Optimization

================================================== */



/* ==========================
 1200px 以下
========================== */


@media(max-width:1200px) {



    .solution-grid {
        grid-template-columns: repeat(2,1fr);
    }




    .value-grid {
        grid-template-columns: repeat(2,1fr);
    }




    .about-content h1 {
        font-size: 48px;
    }
}





/* ==========================
 992px 以下
========================== */


@media(max-width:992px) {



    .header {
        padding: 0 5%;
    }




    .local-grid {
        grid-template-columns: repeat(2,1fr);
    }




    .stats {
        grid-template-columns: repeat(3,1fr);
    }





    section {
        padding: 90px 5%;
    }
}





/* ==========================
 平板尺寸
 768px 以下

========================== */



@media(max-width:768px) {



    /* ---------- Header ---------- */



    .header {
        height: 70px;
        padding: 0 20px;
    }




    .logo {
        font-size: 24px;
    }




    .mobile-btn {
        display: block;
    }




    nav {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        display: none;
        flex-direction: column;
        gap: 0;
        padding: 25px 0;
        background: rgba(5,18,40,.96);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(0,200,255,.2);
    }




        nav.active {
            display: flex;
        }





        nav a {
            padding: 16px 0;
            text-align: center;
            font-size: 17px;
        }





            nav a::after {
                display: none;
            }




    /* ---------- Hero ---------- */


    .about-banner {
        height: auto;
        min-height: 650px;
        margin-top: 70px;
        padding: 100px 25px 80px;
        align-items: center;
    }



        .about-banner::before {
            width: 400px;
            height: 400px;
            right: -200px;
        }



    .about-content {
        width: 100%;
    }



        .about-content h1 {
            font-size: 36px;
            line-height: 1.35;
            letter-spacing: 0;
            margin-bottom: 25px;
        }




        .about-content p {
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 30px;
        }





        .about-content a,
        .about-cta a {
            padding: 14px 32px;
            font-size: 15px;
        }



    /* ---------- Section ---------- */



    section {
        padding: 70px 20px;
    }



        section h2 {
            font-size: 30px;
            margin-bottom: 35px;
        }




    /* ---------- Local ---------- */


    .local-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }



        .local-grid div {
            padding: 28px;
        }





        .local-grid h3 {
            font-size: 22px;
        }



    /* ---------- Solution ---------- */



    .solution-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }




        .solution-grid div {
            padding: 28px;
        }



    /* ---------- Value ---------- */


    .value-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }



        .value-grid div {
            padding: 28px;
        }




    /* ---------- Stats ---------- */


    .stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }



    .stat-box {
        padding: 30px;
    }



        .stat-box h3 {
            font-size: 38px;
        }





    /* ---------- FAQ ---------- */


    .faq-box {
        padding: 25px;
        margin: 18px auto;
    }



        .faq-box h3 {
            font-size: 19px;
        }




        .faq-box p {
            font-size: 15px;
        }



    /* ---------- CTA ---------- */


    .about-cta h2 {
        font-size: 32px;
    }



    .about-cta p {
        font-size: 16px;
    }




    /* ---------- Footer ---------- */


    footer {
        padding: 50px 20px;
    }



        footer h3 {
            font-size: 25px;
        }




    .footer-link {
        flex-direction: column;
        gap: 15px;
    }



    /* ---------- Telegram ---------- */


    .telegram {
        right: 15px;
        bottom: 20px;
        padding: 12px 22px;
        font-size: 14px;
    }
}






/* ==========================
 小屏手机
 480px 以下

========================== */



@media(max-width:480px) {



    .logo {
        font-size: 21px;
    }




    .mobile-btn {
        font-size: 26px;
    }




    .about-banner {
        padding: 90px 20px 60px;
    }




    .about-content h1 {
        font-size: 30px;
    }




    .about-content p {
        font-size: 15px;
    }





    section h2 {
        font-size: 27px;
    }




        section h2::after {
            width: 55px;
        }




    .local-grid div,
    .solution-grid div,
    .value-grid div {
        border-radius: 18px;
    }




    .stat-box h3 {
        font-size: 34px;
    }




    .about-cta h2 {
        font-size: 27px;
    }





    .telegram {
        padding: 10px 18px;
    }
}




/* ==========================
 超小屏幕
 360px 以下

========================== */


@media(max-width:360px) {



    .about-content h1 {
        font-size: 27px;
    }



    .logo {
        font-size: 19px;
    }



    .telegram {
        font-size: 12px;
        padding: 9px 15px;
    }
}






/* ==================================================

 防止移动端动画影响性能

================================================== */



@media(max-width:768px) {



    body::after {
        animation: none;
    }




    .about-banner::after {
        display: none;
    }




    .reveal,
    .reveal-left,
    .reveal-right {
        transition: .5s;
    }
}






/* ==================================================

 Dark Mode 浏览器兼容

================================================== */


@media(prefers-reduced-motion:reduce) {



    * {
        animation: none !important;
        transition: none !important;
    }
}