/* =====================================
   SYSTEM PAGE CSS
   Payment Management System
   Enterprise Financial Technology Style
===================================== */


/* =====================================
   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: #f5f9ff;
    color: #17243b;
    line-height: 1.8;
    overflow-x: hidden;
}



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



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



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



p {
    font-size: 16px;
}



h2 {
    text-align: center;
    font-size: 38px;
    color: #061a3a;
    margin-bottom: 30px;
    position: relative;
}



    h2::after {
        content: "";
        width: 60px;
        height: 3px;
        background: linear-gradient( 90deg, #006cff, #00d9ff );
        position: absolute;
        bottom: -12px;
        left: 50%;
        transform: translateX(-50%);
        border-radius: 10px;
    }







/* =====================================
   Header 顶部导航
===================================== */


.header {
    width: 100%;
    height: 80px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8%;
    background: rgba(4,18,45,.85);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255,255,255,.12);
}



.logo {
    font-size: 28px;
    font-weight: bold;
    letter-spacing: 1px;
    color: #00d9ff;
    text-shadow: 0 0 15px rgba(0,217,255,.6);
}






.header nav {
    display: flex;
    align-items: center;
    gap: 32px;
}




    .header nav a {
        position: relative;
        color: white;
        font-size: 16px;
        transition: .35s;
    }




        .header nav a::before {
            content: "";
            position: absolute;
            bottom: -10px;
            left: 50%;
            width: 0;
            height: 2px;
            background: #00d9ff;
            transform: translateX(-50%);
            transition: .35s;
        }



        .header nav a:hover,
        .header nav .active {
            color: #00d9ff;
        }



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







/* =====================================
   咨询按钮
===================================== */


.nav-btn {
    display: inline-block;
    padding: 11px 30px;
    border-radius: 50px;
    color: white;
    background: linear-gradient( 90deg, #006cff, #00d9ff );
    box-shadow: 0 0 25px rgba(0,180,255,.45);
    transition: .35s;
}



    .nav-btn:hover {
        transform: translateY(-4px);
        box-shadow: 0 15px 40px rgba(0,180,255,.55);
    }







/* =====================================
   Banner 首屏
===================================== */


.banner {
    height: 720px;
    padding-top: 80px;
}





.banner-bg {
    height: 100%;
    display: flex;
    align-items: center;
    background: linear-gradient( 90deg, rgba(0,15,55,.92), rgba(0,100,255,.35) ), url("../images/system-banner.jpg");
    background-size: cover;
    background-position: center;
}





.banner-content {
    max-width: 780px;
    margin-left: 10%;
    color: white;
}





    .banner-content h1 {
        font-size: 58px;
        line-height: 1.25;
        margin-bottom: 25px;
        letter-spacing: 1px;
    }




    .banner-content p {
        font-size: 22px;
        color: rgba(255,255,255,.9);
        margin-bottom: 40px;
    }





    .banner-content a {
        display: inline-block;
        padding: 15px 45px;
        border-radius: 50px;
        color: white;
        background: linear-gradient( 90deg, #00c6ff, #006cff );
        transition: .35s;
    }




        .banner-content a:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,180,255,.45);
        }







/* =====================================
   通用内容区域
===================================== */


.section {
    padding: 90px 8%;
    background: white;
}





    .section:nth-child(even) {
        background: #f5f9ff;
    }





.intro {
    max-width: 900px;
    margin: 0 auto 55px;
    text-align: center;
    color: #667;
    font-size: 18px;
    line-height: 2;
}







/* =====================================
   深色科技区域
===================================== */


.dark {
    padding: 90px 8%;
    background: linear-gradient( 135deg, #061633, #073b80 );
    color: white;
}



    .dark h2 {
        color: white;
    }



    .dark .intro {
        color: rgba(255,255,255,.8);
    }







/* =====================================
   系统架构流程
===================================== */


.architecture {
    max-width: 700px;
    margin: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
}




    .architecture div {
        width: 340px;
        padding: 20px;
        text-align: center;
        border-radius: 50px;
        background: white;
        color: #006cff;
        font-size: 20px;
        font-weight: 600;
        box-shadow: 0 12px 35px rgba(0,100,255,.15);
        transition: .35s;
        position: relative;
    }





        .architecture div:hover {
            color: white;
            transform: translateY(-8px);
            background: linear-gradient( 90deg, #006cff, #00d9ff );
            box-shadow: 0 20px 45px rgba(0,150,255,.35);
        }





        /* 架构连接箭头 */


        .architecture div:not(:last-child)::after {
            content: "↓";
            position: absolute;
            bottom: -35px;
            left: 50%;
            transform: translateX(-50%);
            color: #00aaff;
            font-size: 24px;
        }

/* =====================================
   SYSTEM PAGE CSS
   第二部分
   Business Modules
===================================== */



/* =====================================
   三列布局
===================================== */


.grid3 {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 30px;
    max-width: 1200px;
    margin: auto;
}







/* =====================================
   四列布局
===================================== */


.grid4 {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 25px;
    max-width: 1200px;
    margin: auto;
}







/* =====================================
   通用功能卡片
===================================== */


.box {
    padding: 35px;
    background: white;
    border-radius: 22px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0,80,180,.12);
    transition: .35s;
}





    .box::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: linear-gradient( 90deg, #006cff, #00d9ff );
    }





    .box:hover {
        transform: translateY(-10px);
        box-shadow: 0 25px 55px rgba(0,140,255,.3);
    }





    .box i {
        font-size: 42px;
        color: #008cff;
        margin-bottom: 20px;
    }





    .box h3 {
        font-size: 22px;
        color: #006cff;
        margin-bottom: 15px;
    }





    .box p {
        color: #666;
        font-size: 16px;
        line-height: 1.8;
    }







/* =====================================
   深色背景卡片
===================================== */


.dark .box {
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.18);
    color: white;
}



    .dark .box h3 {
        color: #00d9ff;
    }



    .dark .box p {
        color: rgba(255,255,255,.85);
    }







/* =====================================
   订单交易管理
===================================== */


.grid4 div {
    padding: 32px 20px;
    background: white;
    border-radius: 20px;
    text-align: center;
    font-size: 18px;
    color: #006cff;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0,80,180,.12);
    position: relative;
    transition: .35s;
}





    .grid4 div:hover {
        color: white;
        transform: translateY(-8px);
        background: linear-gradient( 135deg, #006cff, #00d9ff );
        box-shadow: 0 20px 40px rgba(0,150,255,.35);
    }







/* =====================================
   深色区域四宫格
===================================== */


.dark .grid4 div {
    background: rgba(255,255,255,.1);
    color: white;
    border: 1px solid rgba(255,255,255,.2);
}





    .dark .grid4 div:hover {
        background: white;
        color: #006cff;
    }







/* =====================================
   资金结算模块增强
===================================== */


.section .grid3 > div {
    padding: 35px;
    background: white;
    border-radius: 22px;
    text-align: center;
    color: #006cff;
    font-size: 18px;
    font-weight: 600;
    box-shadow: 0 12px 35px rgba(0,80,180,.12);
    transition: .35s;
}




    .section .grid3 > div:hover {
        transform: translateY(-8px);
        background: linear-gradient( 135deg, #006cff, #00d9ff );
        color: white;
    }







/* =====================================
   风控安全系统
===================================== */


.security {
    padding: 90px 8%;
    background: linear-gradient( 120deg, #eef8ff, #ffffff );
}





    .security .grid4 div {
        padding: 35px 20px;
        background: white;
        border-radius: 20px;
        text-align: center;
        font-size: 18px;
        font-weight: 600;
        color: #006cff;
        border-top: 4px solid #006cff;
        box-shadow: 0 12px 35px rgba(0,80,180,.12);
        transition: .35s;
    }




        .security .grid4 div:hover {
            transform: translateY(-10px);
            background: linear-gradient( 135deg, #006cff, #00d9ff );
            color: white;
        }







/* =====================================
   数据统计分析
===================================== */


.analysis {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 25px;
    max-width: 1100px;
    margin: auto;
}





    .analysis span {
        min-width: 190px;
        padding: 22px 40px;
        border-radius: 50px;
        text-align: center;
        color: white;
        font-size: 18px;
        background: rgba(255,255,255,.12);
        border: 1px solid rgba(255,255,255,.25);
        transition: .35s;
    }





        .analysis span:hover {
            background: white;
            color: #006cff;
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0,0,0,.2);
        }







/* =====================================
   API接口能力
===================================== */


.api {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 25px;
    max-width: 1100px;
    margin: auto;
}




    .api div {
        min-width: 170px;
        padding: 20px 35px;
        border-radius: 50px;
        background: white;
        color: #006cff;
        font-size: 18px;
        font-weight: 600;
        text-align: center;
        box-shadow: 0 12px 30px rgba(0,100,255,.15);
        transition: .35s;
    }




        .api div:hover {
            background: linear-gradient( 90deg, #006cff, #00d9ff );
            color: white;
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,150,255,.35);
        }







/* =====================================
   SEO内容增强
===================================== */


.seo-text {
    max-width: 1000px;
    margin: auto;
    font-size: 18px;
    line-height: 2;
    color: #555;
}



    .seo-text strong {
        color: #006cff;
    }





/* =====================================
   信息高亮模块
===================================== */


.highlight {
    padding: 40px;
    border-radius: 25px;
    background: linear-gradient( 135deg, #eef8ff, #ffffff );
    border-left: 5px solid #006cff;
}





    .highlight h3 {
        color: #006cff;
        margin-bottom: 15px;
    }





    .highlight p {
        color: #666;
    }

/* =====================================
   SYSTEM PAGE CSS
   第三部分
   Advantage + CTA + Responsive
===================================== */



/* =====================================
   系统优势总结
===================================== */


.advantages {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 25px;
    max-width: 1100px;
    margin: auto;
}




    .advantages span {
        padding: 18px 40px;
        background: white;
        color: #006cff;
        font-size: 18px;
        font-weight: 600;
        border-radius: 50px;
        box-shadow: 0 12px 30px rgba(0,80,180,.12);
        position: relative;
        overflow: hidden;
        transition: .35s;
    }





        .advantages span::before {
            content: "";
            position: absolute;
            top: 0;
            left: -120%;
            width: 80%;
            height: 100%;
            background: linear-gradient( 120deg, transparent, rgba(255,255,255,.8), transparent );
            transition: .6s;
        }





        .advantages span:hover::before {
            left: 130%;
        }





        .advantages span:hover {
            color: white;
            transform: translateY(-8px);
            background: linear-gradient( 135deg, #006cff, #00d9ff );
            box-shadow: 0 20px 40px rgba(0,150,255,.35);
        }







/* =====================================
   CTA 联系区域
===================================== */


.cta {
    padding: 110px 20px;
    text-align: center;
    color: white;
    background: linear-gradient( 120deg, #006cff, #00d9ff );
    position: relative;
    overflow: hidden;
}





    .cta::before {
        content: "";
        position: absolute;
        width: 500px;
        height: 500px;
        border-radius: 50%;
        background: rgba(255,255,255,.12);
        top: -250px;
        right: -150px;
    }





    .cta::after {
        content: "";
        position: absolute;
        width: 350px;
        height: 350px;
        border-radius: 50%;
        background: rgba(255,255,255,.08);
        bottom: -150px;
        left: -100px;
    }





    .cta h2 {
        position: relative;
        z-index: 2;
        color: white;
        font-size: 44px;
        margin-bottom: 20px;
    }





        .cta h2::after {
            display: none;
        }





    .cta p {
        position: relative;
        z-index: 2;
        font-size: 21px;
        margin-bottom: 35px;
    }





    .cta .nav-btn {
        position: relative;
        z-index: 2;
        padding: 15px 45px;
        background: white;
        color: #006cff;
        box-shadow: none;
    }





        .cta .nav-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,.2);
        }







/* =====================================
   CTA友情链接
===================================== */


.friend-links {
    position: relative;
    z-index: 2;
    margin-top: 40px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 25px;
}





    .friend-links a {
        padding: 8px 22px;
        border-radius: 30px;
        font-size: 14px;
        color: white;
        background: rgba(255,255,255,.12);
        border: 1px solid rgba(255,255,255,.25);
        transition: .35s;
    }





        .friend-links a:hover {
            background: white;
            color: #006cff;
            transform: translateY(-4px);
        }







/* =====================================
   Footer
===================================== */


footer {
    padding: 35px 20px;
    text-align: center;
    background: #061633;
    color: white;
    font-size: 14px;
}





    footer a {
        color: #00d9ff;
    }







/* =====================================
   页面滚动动画
===================================== */


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





    .fade-up.show {
        opacity: 1;
        transform: translateY(0);
    }







/* =====================================
   返回顶部按钮
===================================== */


.back-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: white;
    background: linear-gradient( 135deg, #006cff, #00d9ff );
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0,120,255,.35);
    transition: .35s;
    z-index: 999;
}





    .back-top:hover {
        transform: translateY(-6px);
    }







/* =====================================
   大屏优化
===================================== */


@media(min-width:1200px) {



    .section,
    .dark,
    .security {
        padding-left: 10%;
        padding-right: 10%;
    }
}







/* =====================================
   平板适配
===================================== */


@media(max-width:1100px) {



    .header {
        padding: 0 30px;
    }



        .header nav {
            gap: 20px;
        }



    .grid4 {
        grid-template-columns: repeat(2,1fr);
    }
}







/* =====================================
   手机端适配
===================================== */


@media(max-width:900px) {



    body {
        overflow-x: hidden;
    }




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




    .logo {
        font-size: 22px;
    }




    .header nav {
        display: none;
    }




    .nav-btn {
        padding: 8px 18px;
        font-size: 14px;
    }







    /* Banner */


    .banner {
        height: 600px;
    }



    .banner-content {
        margin: 0 25px;
    }




        .banner-content h1 {
            font-size: 38px;
        }




        .banner-content p {
            font-size: 18px;
        }





        .banner-content a {
            padding: 13px 32px;
        }







    /* 内容区域 */


    .section,
    .dark,
    .security {
        padding: 60px 20px;
    }





    h2 {
        font-size: 30px;
    }







    /* 网格 */


    .grid3,
    .grid4 {
        grid-template-columns: 1fr;
    }





    .box {
        padding: 28px;
    }







    /* 架构 */


    .architecture div {
        width: 90%;
        font-size: 17px;
    }







    /* 数据 */


    .analysis {
        flex-direction: column;
    }





        .analysis span {
            width: 90%;
        }







    /* API */


    .api {
        flex-direction: column;
        align-items: center;
    }




        .api div {
            width: 90%;
        }







    /* 优势 */


    .advantages {
        gap: 15px;
    }





        .advantages span {
            width: 90%;
            text-align: center;
        }







    /* CTA */


    .cta {
        padding: 80px 20px;
    }





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





        .cta p {
            font-size: 17px;
        }







    .friend-links {
        gap: 12px;
    }





        .friend-links a {
            font-size: 13px;
        }
}







/* =====================================
   超小屏幕
===================================== */


@media(max-width:480px) {



    .logo {
        font-size: 20px;
    }



    .nav-btn {
        padding: 7px 15px;
    }



    .banner-content h1 {
        font-size: 32px;
    }



    .banner-content p {
        font-size: 16px;
    }



    h2 {
        font-size: 26px;
    }



    .box {
        border-radius: 18px;
    }



    .cta h2 {
        font-size: 28px;
    }
}
/* =====================================
   FAQ 常见问题模块
===================================== */


.faq-section {
    padding: 90px 8%;
    background: #f5f9ff;
}




    .faq-section h2 {
        text-align: center;
        font-size: 38px;
        color: #061a3a;
        margin-bottom: 25px;
        position: relative;
    }



        .faq-section h2::after {
            content: "";
            display: block;
            width: 70px;
            height: 4px;
            margin: 18px auto 0;
            border-radius: 10px;
            background: linear-gradient( 90deg, #006cff, #00d9ff );
        }





.faq-container {
    max-width: 1000px;
    margin: 50px auto 0;
}





.faq-item {
    background: white;
    padding: 35px 40px;
    margin-bottom: 25px;
    border-radius: 22px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0,80,180,.12);
    transition: .35s;
}





    /* 左侧科技线 */


    .faq-item::before {
        content: "";
        position: absolute;
        left: 0;
        top: 0;
        width: 5px;
        height: 100%;
        background: linear-gradient( 180deg, #006cff, #00d9ff );
    }





    .faq-item:hover {
        transform: translateY(-8px);
        box-shadow: 0 25px 55px rgba(0,120,255,.25);
    }





    .faq-item h3 {
        font-size: 22px;
        color: #006cff;
        margin-bottom: 15px;
        padding-left: 10px;
    }





    .faq-item p {
        font-size: 16px;
        line-height: 2;
        color: #555;
        padding-left: 10px;
    }









/* =====================================
   FAQ简介文字
===================================== */


.faq-intro {
    max-width: 850px;
    margin: 0 auto;
    text-align: center;
    color: #666;
    font-size: 18px;
    line-height: 2;
}









/* =====================================
   关键词模块
===================================== */


.keyword-section {
    padding: 90px 8%;
    background: linear-gradient( 135deg, #061633, #073b80 );
}




    .keyword-section h2 {
        color: white;
        text-align: center;
        font-size: 38px;
        margin-bottom: 45px;
    }





        .keyword-section h2::after {
            content: "";
            display: block;
            width: 70px;
            height: 4px;
            margin: 18px auto;
            border-radius: 10px;
            background: linear-gradient( 90deg, #00d9ff, #006cff );
        }









.keyword-list {
    max-width: 1100px;
    margin: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}








    .keyword-list a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 14px 30px;
        border-radius: 50px;
        color: white;
        font-size: 16px;
        background: rgba(255,255,255,.12);
        border: 1px solid rgba(255,255,255,.25);
        transition: .35s;
    }








        .keyword-list a:hover {
            background: white;
            color: #006cff;
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,.2);
        }









/* =====================================
   FAQ + Keywords 手机端
===================================== */


@media(max-width:900px) {



    .faq-section,
    .keyword-section {
        padding: 60px 20px;
    }





        .faq-section h2,
        .keyword-section h2 {
            font-size: 30px;
        }





    .faq-item {
        padding: 28px 25px;
    }





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





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





    .keyword-list {
        gap: 15px;
    }





        .keyword-list a {
            width: 90%;
            font-size: 15px;
        }
}









@media(max-width:480px) {



    .faq-section h2,
    .keyword-section h2 {
        font-size: 26px;
    }





    .faq-item {
        border-radius: 18px;
    }





    .keyword-list a {
        padding: 12px 20px;
    }
}
/* =====================================
   SEO内容展示模块
   Payment System SEO Content
===================================== */


.seo-content {
    padding: 90px 8%;
    background: #ffffff;
}





/* 内容最大宽度 */


.seo-content {
    max-width: 1200px;
    margin: 0 auto;
}







    /* 主标题 */


    .seo-content h2 {
        text-align: center;
        font-size: 38px;
        color: #061a3a;
        margin-bottom: 40px;
        position: relative;
    }





        .seo-content h2::after {
            content: "";
            display: block;
            width: 75px;
            height: 4px;
            margin: 18px auto 0;
            border-radius: 10px;
            background: linear-gradient( 90deg, #006cff, #00d9ff );
        }









    /* SEO正文 */


    .seo-content p {
        max-width: 1000px;
        margin: 0 auto 30px;
        font-size: 17px;
        line-height: 2.1;
        color: #555;
        letter-spacing: .3px;
    }





    /* 段落关键词强调 */


    .seo-content strong {
        color: #006cff;
    }









    /* 小标题模块 */


    .seo-content h3 {
        max-width: 1000px;
        margin: 55px auto 20px;
        padding-left: 20px;
        font-size: 26px;
        color: #006cff;
        position: relative;
    }





        /* 左侧蓝色标识 */


        .seo-content h3::before {
            content: "";
            position: absolute;
            left: 0;
            top: 8px;
            width: 5px;
            height: 28px;
            border-radius: 10px;
            background: linear-gradient( 180deg, #006cff, #00d9ff );
        }









    /* SEO内容卡片化 */


    .seo-content p {
        background: #f8fbff;
        padding: 25px 35px;
        border-radius: 18px;
        box-shadow: 0 10px 30px rgba(0,80,180,.08);
        transition: .35s;
    }





        .seo-content p:hover {
            transform: translateY(-3px);
            box-shadow: 0 18px 40px rgba(0,120,255,.15);
        }









    /* =====================================
   SEO关键词高亮
===================================== */


    .seo-content h3 {
        background: linear-gradient( 90deg, rgba(0,108,255,.05), transparent );
    }









/* =====================================
   SEO区域移动端
===================================== */


@media(max-width:900px) {



    .seo-content {
        padding: 60px 20px;
    }





        .seo-content h2 {
            font-size: 30px;
        }





        .seo-content h3 {
            font-size: 22px;
            margin-top: 40px;
        }





        .seo-content p {
            padding: 20px;
            font-size: 15px;
            line-height: 1.9;
        }
}





@media(max-width:480px) {



    .seo-content h2 {
        font-size: 26px;
    }





    .seo-content h3 {
        font-size: 20px;
    }





    .seo-content p {
        border-radius: 15px;
        padding: 18px;
    }
}