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

Vietnam Payment Gateway
FinTech Dark Theme CSS

Part 1:
Global + Header + Hero + Base Components

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



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


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



html {
    scroll-behavior: smooth;
}



body {
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    background: #050b18;
    color: #d9e8ff;
    line-height: 1.8;
    overflow-x: hidden;
}





    body::before {
        content: "";
        position: fixed;
        width: 650px;
        height: 650px;
        top: -250px;
        left: -250px;
        background: radial-gradient( circle, rgba(0,200,255,.25), transparent 70% );
        z-index: -1;
        filter: blur(10px);
    }




    body::after {
        content: "";
        position: fixed;
        width: 550px;
        height: 550px;
        right: -200px;
        bottom: -200px;
        background: radial-gradient( circle, rgba(0,90,255,.25), transparent 70% );
        z-index: -1;
    }




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



img {
    max-width: 100%;
    display: block;
}



h1,
h2,
h3 {
    font-weight: 700;
}



p {
    color: #b9cce6;
}





section {
    padding: 100px 8%;
    position: relative;
}





    section h2 {
        text-align: center;
        color: #ffffff;
        font-size: 38px;
        line-height: 1.4;
        margin-bottom: 55px;
    }



        section h2::after {
            content: "";
            display: block;
            width: 70px;
            height: 3px;
            margin: 20px auto;
            background: #00c8ff;
            box-shadow: 0 0 15px #00c8ff;
        }









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


.header {
    height: 80px;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8%;
    background: rgba(5,15,35,.85);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(0,200,255,.18);
}







.logo {
    font-size: 28px;
    font-weight: 800;
    color: white;
    letter-spacing: 1px;
    white-space: nowrap;
}





    .logo span {
        color: #00c8ff;
    }







nav {
    display: flex;
    align-items: center;
    gap: 40px;
}





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







        nav a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -10px;
            width: 0;
            height: 2px;
            background: #00c8ff;
            transition: .3s;
        }







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







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









.mobile-btn {
    display: none;
    font-size: 32px;
    color: white;
    cursor: pointer;
}









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



.about-banner {
    min-height: 780px;
    margin-top: 80px;
    padding: 0 10%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
    background: linear-gradient( 135deg, #020817, #071c3b, #003b68 );
}







    .about-banner::before {
        content: "";
        position: absolute;
        width: 700px;
        height: 700px;
        right: -220px;
        top: 80px;
        background: radial-gradient( circle, rgba(0,200,255,.35), transparent 65% );
        filter: blur(25px);
    }







    .about-banner::after {
        content: "";
        position: absolute;
        width: 300px;
        height: 300px;
        left: 5%;
        bottom: 10%;
        background: radial-gradient( circle, rgba(0,120,255,.25), transparent 70% );
    }









/* ==========================
Hero Content
========================== */


.about-content {
    max-width: 850px;
    position: relative;
    z-index: 2;
}








.breadcrumb {
    margin-bottom: 25px;
    font-size: 14px;
    color: #9bb8d8;
}






    .breadcrumb a {
        color: #00c8ff;
    }





    .breadcrumb span {
        margin: 0 8px;
    }








.about-content h1 {
    font-size: 55px;
    line-height: 1.25;
    margin-bottom: 35px;
    background: linear-gradient( 90deg, #ffffff, #00c8ff );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}








.about-content p {
    max-width: 800px;
    font-size: 19px;
    line-height: 2;
    margin-bottom: 45px;
    color: #c8dcf5;
}








.about-content a,
.about-cta a {
    display: inline-block;
    padding: 15px 45px;
    border-radius: 50px;
    color: white;
    font-weight: bold;
    background: linear-gradient( 90deg, #008cff, #00d4ff );
    box-shadow: 0 0 25px rgba(0,180,255,.45);
    transition: .35s;
}






    .about-content a:hover,
    .about-cta a:hover {
        transform: translateY(-5px);
        box-shadow: 0 0 45px rgba(0,220,255,.8);
    }









/* ==========================
Hero Image
========================== */


.hero-image {
    width: 430px;
    position: relative;
    z-index: 2;
    margin-left: 50px;
    border-radius: 25px;
    border: 1px solid rgba(0,200,255,.25);
    box-shadow: 0 20px 60px rgba(0,0,0,.5);
    animation: floatImage 6s infinite ease-in-out;
}







@keyframes floatImage {


    0% {
        transform: translateY(0);
    }



    50% {
        transform: translateY(-15px);
    }



    100% {
        transform: translateY(0);
    }
}









/* ==========================
按钮基础
========================== */


.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 40px;
    border-radius: 50px;
    background: linear-gradient( 90deg, #008cff, #00d4ff );
    color: white;
    font-weight: bold;
}









/* ==========================
玻璃卡片基础
========================== */


.glass-card {
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(0,200,255,.18);
    backdrop-filter: blur(12px);
    border-radius: 20px;
    transition: .35s;
}



    .glass-card:hover {
        transform: translateY(-10px);
        border-color: #00c8ff;
        box-shadow: 0 20px 45px rgba(0,170,255,.25);
    }
/* ==================================================

Vietnam Payment Gateway
FinTech Dark Theme CSS

Part 2:
Section + Service Cards + Solution + Technology + Stats

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






/* ==========================
企业介绍 Section
========================== */


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





    .about-intro p {
        max-width: 1050px;
        margin: 25px auto;
        text-align: center;
        font-size: 18px;
        line-height: 2;
        color: #c4d8ef;
    }








/* ==========================
SEO内容模块
========================== */


.seo-content {
    background: #050b18;
    position: relative;
}





    .seo-content::before {
        content: "";
        position: absolute;
        width: 400px;
        height: 400px;
        left: -150px;
        top: 50px;
        background: radial-gradient( circle, rgba(0,200,255,.18), transparent 70% );
    }





    .seo-content p {
        max-width: 1100px;
        margin: 25px auto;
        font-size: 18px;
        line-height: 2;
        color: #c7daf0;
        text-align: center;
    }









/* ==========================
本地支付能力
========================== */


.local {
    background: linear-gradient( 135deg, #061426, #071120 );
}





.local-grid {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 30px;
    max-width: 1200px;
    margin: auto;
}






    .local-grid > div {
        padding: 40px;
        min-height: 320px;
        background: rgba(255,255,255,.05);
        border: 1px solid rgba(0,200,255,.18);
        border-radius: 22px;
        backdrop-filter: blur(15px);
        transition: .35s;
    }





        .local-grid > div:hover {
            transform: translateY(-12px);
            border-color: #00c8ff;
            box-shadow: 0 20px 50px rgba(0,180,255,.25);
        }







    .local-grid h3 {
        font-size: 24px;
        margin-bottom: 18px;
        color: #00c8ff;
    }







    .local-grid p {
        font-size: 16px;
        line-height: 1.9;
        color: #c6d8ee;
    }







    .local-grid a {
        display: inline-block;
        margin-top: 20px;
        color: #00c8ff;
        font-size: 15px;
        transition: .3s;
    }



        .local-grid a:hover {
            color: white;
        }









/* ==========================
支付解决方案
========================== */


.solution {
    background: #050b18;
}







.solution-grid {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 25px;
    max-width: 1250px;
    margin: auto;
}








    .solution-grid > div {
        padding: 35px;
        min-height: 260px;
        border-radius: 20px;
        background: linear-gradient( 145deg, rgba(0,120,255,.18), rgba(255,255,255,.04) );
        border: 1px solid rgba(0,180,255,.2);
        transition: .35s;
    }






        .solution-grid > div:hover {
            transform: translateY(-10px);
            background: linear-gradient( 145deg, rgba(0,150,255,.25), rgba(255,255,255,.08) );
        }








    .solution-grid h3 {
        font-size: 22px;
        color: white;
        margin-bottom: 15px;
    }







    .solution-grid p {
        color: #bdd2eb;
        line-height: 1.8;
    }









/* ==========================
应用场景
========================== */


.application {
    background: linear-gradient( 180deg, #061528, #050b18 );
}








.value-grid {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 25px;
    max-width: 1200px;
    margin: auto;
}







    .value-grid > div {
        padding: 35px;
        min-height: 220px;
        border-radius: 20px;
        background: rgba(255,255,255,.06);
        border: 1px solid rgba(0,200,255,.15);
        transition: .35s;
    }







        .value-grid > div:hover {
            transform: translateY(-8px);
            border-color: #00c8ff;
            box-shadow: 0 15px 40px rgba(0,150,255,.2);
        }







    .value-grid h3 {
        font-size: 22px;
        color: #00c8ff;
        margin-bottom: 15px;
    }






    .value-grid p {
        color: #d0dded;
        line-height: 1.8;
    }









/* ==========================
技术优势
========================== */


.technology {
    background: #071120;
}





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









/* ==========================
数据展示
========================== */


.stats {
    background: linear-gradient( 135deg, #00345d, #001527 );
    text-align: center;
}





    .stats > .stats {
        display: grid;
        grid-template-columns: repeat(3,1fr);
        gap: 30px;
        max-width: 1000px;
        margin: auto;
    }





.stat-box {
    padding: 45px 30px;
    border-radius: 25px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(0,200,255,.2);
    backdrop-filter: blur(12px);
}







    .stat-box h3 {
        font-size: 48px;
        color: #00d4ff;
        margin-bottom: 10px;
        text-shadow: 0 0 20px rgba(0,200,255,.5);
    }







    .stat-box p {
        color: white;
        font-size: 18px;
    }









/* ==========================
通用卡片动画
========================== */


.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: .8s;
}





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






.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: .8s;
}





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





.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: .8s;
}





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

/* ==================================================
   Vietnam Payment Gateway
   Part 3
   FAQ + CTA + Footer + Responsive
================================================== */


/* ==========================
   FAQ
========================== */

.faq {
    background: linear-gradient(180deg,#071120,#050b18);
}

.faq-box {
    max-width: 1000px;
    margin: 25px auto;
    padding: 35px;
    border-radius: 20px;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(0,200,255,.15);
    backdrop-filter: blur(12px);
    transition: .35s;
}

    .faq-box:hover {
        transform: translateY(-8px);
        border-color: #00c8ff;
        box-shadow: 0 20px 45px rgba(0,170,255,.20);
    }

    .faq-box h3 {
        color: #fff;
        font-size: 22px;
        margin-bottom: 15px;
    }

    .faq-box p {
        color: #c9d9ef;
        line-height: 1.9;
    }



/* ==========================
   CTA
========================== */

.about-cta {
    text-align: center;
    background: linear-gradient(135deg,#004a7c,#00172b);
    overflow: hidden;
    position: relative;
}

    .about-cta::before {
        content: "";
        position: absolute;
        width: 500px;
        height: 500px;
        left: -180px;
        top: -180px;
        background: radial-gradient(circle, rgba(0,200,255,.18), transparent 70%);
    }

    .about-cta::after {
        content: "";
        position: absolute;
        width: 400px;
        height: 400px;
        right: -150px;
        bottom: -150px;
        background: radial-gradient(circle, rgba(0,120,255,.18), transparent 70%);
    }

    .about-cta h2 {
        font-size: 42px;
        color: #fff;
        margin-bottom: 25px;
        position: relative;
        z-index: 2;
    }

    .about-cta p {
        max-width: 900px;
        margin: 0 auto 40px;
        color: #d7e6fa;
        font-size: 18px;
        line-height: 2;
        position: relative;
        z-index: 2;
    }

    .about-cta a {
        position: relative;
        z-index: 2;
    }



/* ==========================
   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: #fff;
        margin-bottom: 15px;
    }

    footer p {
        color: #9ab2cf;
        line-height: 2;
    }

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

    .footer-link a {
        color: #d8e8ff;
        transition: .3s;
    }

        .footer-link a:hover {
            color: #00c8ff;
        }



/* ==========================
   Telegram
========================== */

.telegram {
    position: fixed;
    right: 30px;
    bottom: 30px;
    padding: 15px 28px;
    border-radius: 50px;
    background: linear-gradient(90deg,#0088cc,#00b7ff);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0,150,255,.45);
    z-index: 999;
    transition: .35s;
}

    .telegram:hover {
        transform: translateY(-5px);
        box-shadow: 0 18px 40px rgba(0,180,255,.55);
    }



/* ==========================
   Reveal Animation
========================== */

.reveal,
.reveal-left,
.reveal-right {
    opacity: 0;
    transition: .8s;
}

.reveal {
    transform: translateY(40px);
}

.reveal-left {
    transform: translateX(-40px);
}

.reveal-right {
    transform: translateX(40px);
}

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



/* ==========================
   Responsive 1200px
========================== */

@media(max-width:1200px) {

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

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

    .hero-image {
        width: 360px;
    }

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



/* ==========================
   Responsive 992px
========================== */

@media(max-width:992px) {

    .about-banner {
        flex-direction: column;
        justify-content: center;
        text-align: center;
        padding: 120px 40px 80px;
    }

    .about-content {
        max-width: 100%;
    }

    .hero-image {
        width: 320px;
        margin: 60px auto 0;
    }

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

    .stats > .stats {
        grid-template-columns: 1fr;
    }
}



/* ==========================
   Responsive 768px
========================== */

@media(max-width:768px) {

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

    .logo {
        font-size: 22px;
    }

    .mobile-btn {
        display: block;
    }

    nav {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        display: none;
        flex-direction: column;
        gap: 0;
        background: #061427;
        border-top: 1px solid rgba(0,200,255,.15);
    }

        nav.active {
            display: flex;
        }

        nav a {
            padding: 18px 20px;
            text-align: center;
            border-bottom: 1px solid rgba(255,255,255,.05);
        }

    .about-banner {
        min-height: auto;
        margin-top: 70px;
        padding: 100px 25px 70px;
    }

    .about-content h1 {
        font-size: 34px;
    }

    .about-content p {
        font-size: 16px;
        line-height: 1.9;
    }

    .hero-image {
        width: 260px;
    }

    section {
        padding: 70px 20px;
    }

        section h2 {
            font-size: 30px;
        }

    .solution-grid,
    .value-grid {
        grid-template-columns: 1fr;
    }

        .local-grid > div,
        .solution-grid > div,
        .value-grid > div {
            min-height: auto;
        }

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

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

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



/* ==========================
   Responsive 576px
========================== */

@media(max-width:576px) {

    .logo {
        font-size: 20px;
    }

    .about-content h1 {
        font-size: 28px;
    }

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

    section h2 {
        font-size: 26px;
    }

    .faq-box {
        padding: 25px;
    }

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

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

    .hero-image {
        width: 220px;
    }

    .about-content a,
    .about-cta a {
        width: 100%;
        text-align: center;
        padding: 14px 20px;
    }

    .telegram {
        width: calc(100% - 30px);
        right: 15px;
        text-align: center;
        border-radius: 12px;
    }
}