/* Google Font */

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

html{
    scroll-behavior:smooth;
}

body{

    font-family:'Inter',sans-serif;
    background:#050816;
    color:#fff;
    overflow-x:hidden;
    line-height:1.6;

}

/* Variables */

:root{

    --primary:#ff2d55;
    --primary-hover:#e11d48;

    --dark:#050816;
    --card:#0F172A;

    --border:rgba(255,255,255,.08);

    --text:#ffffff;
    --text-light:#cbd5e1;

    --radius:20px;

}

/* Scrollbar */

::-webkit-scrollbar{

    width:8px;

}

::-webkit-scrollbar-track{

    background:#050816;

}

::-webkit-scrollbar-thumb{

    background:var(--primary);
    border-radius:100px;

}

/* Selection */

::selection{

    background:var(--primary);
    color:white;

}

/* Container */

.container-custom{

    max-width:1200px;
    margin:auto;
    padding-inline:24px;

}

.section-padding{

    padding:110px 0;

}

@media(max-width:768px){

    .section-padding{

        padding:80px 0;

    }

}

/* Gradient Text */

.gradient-text{

    background:linear-gradient(
        90deg,
        #ff2d55,
        #ff6a88
    );

    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;

}

/* Hero Tag */

.hero-tag{

    display:inline-block;

    padding:8px 18px;

    border-radius:100px;

    background:rgba(255,45,85,.12);

    border:1px solid rgba(255,45,85,.25);

    color:#ff8da4;

    font-weight:600;

    font-size:.9rem;

}

/* Buttons */

.primary-btn{

    display:inline-flex;
    align-items:center;
    justify-content:center;

    padding:16px 34px;

    background:linear-gradient(
        135deg,
        #ff2d55,
        #ff5d7d
    );

    color:white;

    border-radius:15px;

    text-decoration:none;

    font-weight:700;

    transition:.35s;

    box-shadow:
    0 10px 30px rgba(255,45,85,.35);

}

.primary-btn:hover{

    transform:translateY(-3px);

    box-shadow:
    0 15px 35px rgba(255,45,85,.45);

}

.secondary-btn{

    display:inline-flex;

    align-items:center;

    justify-content:center;

    padding:16px 34px;

    border-radius:15px;

    text-decoration:none;

    color:white;

    border:1px solid rgba(255,255,255,.1);

    transition:.35s;

    background:rgba(255,255,255,.03);

}

.secondary-btn:hover{

    background:rgba(255,255,255,.08);

}

/* ===========================
   Navbar
=========================== */

#navbar{

    transition:.35s;

    backdrop-filter:blur(14px);

    background:rgba(5,8,22,.55);

    border-bottom:1px solid rgba(255,255,255,.05);

}

.nav-link{

    color:white;

    text-decoration:none;

    transition:.3s;

    font-weight:500;

}

.nav-link:hover{

    color:var(--primary);

}

#mobile-menu{

    background:#09101f;

    border-top:1px solid rgba(255,255,255,.08);

}

#mobile-menu a{

    color:white;

    text-decoration:none;

    font-size:1rem;

}

#mobile-menu a:hover{

    color:var(--primary);

}

/* Hero */

#hero{

    position:relative;

    overflow:hidden;

}

#hero::before{

    content:"";

    position:absolute;

    width:700px;

    height:700px;

    background:radial-gradient(

        rgba(255,45,85,.15),

        transparent 70%

    );

    right:-250px;

    top:-180px;

    border-radius:50%;

    pointer-events:none;

}

#hero::after{

    content:"";

    position:absolute;

    width:550px;

    height:550px;

    background:radial-gradient(

        rgba(0,180,255,.08),

        transparent 70%

    );

    left:-220px;

    bottom:-180px;

    border-radius:50%;

}

.hero-phone{

    width:380px;

    max-width:100%;

    filter:

    drop-shadow(
    0 40px 80px rgba(0,0,0,.45)
    );

    animation:float 5s ease-in-out infinite;

}

@keyframes float{

    0%{

        transform:translateY(0);

    }

    50%{

        transform:translateY(-10px);

    }

    100%{

        transform:translateY(0);

    }

}

/* Section Title */

.section-title{

    text-align:center;

    max-width:720px;

    margin:auto;

}

.section-title h2{

    font-size:42px;

    margin-bottom:18px;

    font-weight:800;

}

.section-title p{

    color:var(--text-light);

    line-height:1.8;

}

/* Feature Cards */

.feature-card{

    background:rgba(255,255,255,.03);

    border:1px solid rgba(255,255,255,.06);

    border-radius:22px;

    padding:40px 30px;

    transition:.35s;

    backdrop-filter:blur(18px);

}

.feature-card:hover{

    transform:translateY(-8px);

    border-color:rgba(255,45,85,.35);

    box-shadow:
    0 15px 40px rgba(0,0,0,.35);

}

.feature-card i{

    font-size:42px;

    color:var(--primary);

    margin-bottom:25px;

}

.feature-card h3{

    font-size:22px;

    margin-bottom:15px;

}

.feature-card p{

    color:var(--text-light);

    line-height:1.8;

}

/* About Section */

#about img{

    width:100%;
    display:block;
    border-radius:28px;

    box-shadow:
    0 30px 60px rgba(0,0,0,.35);

}

#about h2{

    font-size:42px;
    font-weight:800;
    line-height:1.3;

}

#about p{

    color:var(--text-light);

}

#about ul{

    list-style:none;

}

#about ul li{

    padding:12px 0;

    font-size:17px;

    color:white;

}


/* CTA Section */

.cta-box{

    background:

    linear-gradient(
        135deg,
        rgba(255,45,85,.15),
        rgba(255,255,255,.03)
    );

    border:1px solid rgba(255,255,255,.08);

    border-radius:32px;

    text-align:center;

    padding:80px 40px;

    backdrop-filter:blur(20px);

}

.cta-box h2{

    font-size:48px;

    margin-bottom:20px;

    font-weight:800;

}

.cta-box p{

    color:var(--text-light);

    max-width:650px;

    margin:auto;

    margin-bottom:40px;

    line-height:1.8;

}


/* FAQ */

.faq-container{

    max-width:900px;

    margin:auto;

    margin-top:70px;

}

.faq-item{

    border:1px solid rgba(255,255,255,.08);

    border-radius:18px;

    margin-bottom:20px;

    overflow:hidden;

    background:rgba(255,255,255,.03);

    backdrop-filter:blur(15px);

}

.faq-question{

    width:100%;

    background:none;

    border:none;

    color:white;

    font-size:18px;

    font-weight:600;

    cursor:pointer;

    padding:25px;

    text-align:left;

}

.faq-question:hover{

    color:var(--primary);

}

.faq-answer{

    display:none;

    padding:0 25px 25px;

    color:var(--text-light);

    line-height:1.8;

}

.faq-item.active .faq-answer{

    display:block;

}


/* Footer */

footer{

    background:#040612;

}

footer a{

    color:var(--text-light);

    text-decoration:none;

    transition:.3s;

}

footer a:hover{

    color:var(--primary);

}


/* Back To Top */

#backToTop{

    position:fixed;

    right:25px;

    bottom:25px;

    width:52px;

    height:52px;

    border:none;

    border-radius:50%;

    cursor:pointer;

    background:linear-gradient(
        135deg,
        #ff2d55,
        #ff5c7d
    );

    color:white;

    font-size:18px;

    display:flex;

    align-items:center;

    justify-content:center;

    box-shadow:
    0 12px 30px rgba(255,45,85,.35);

    opacity:0;

    visibility:hidden;

    transition:.35s;

    z-index:999;

}

#backToTop.show{

    opacity:1;

    visibility:visible;

}

#backToTop:hover{

    transform:translateY(-5px);

}


/* Utilities */

img{

    user-select:none;

}

a{

    transition:.3s;

}

button{

    font-family:inherit;

}

section{

    position:relative;

}


/* Fade Animation */

.fade-up{

    opacity:0;

    transform:translateY(40px);

    transition:all .8s ease;

}

.fade-up.show{

    opacity:1;

    transform:translateY(0);

}


/* Responsive */

@media (max-width:1024px){

.hero-phone{

    width:300px;

}

.section-title h2{

    font-size:36px;

}

.cta-box h2{

    font-size:38px;

}

#about h2{

    font-size:36px;

}

}


@media (max-width:768px){

body{

    font-size:15px;

}

.container-custom{

    padding-inline:20px;

}

.section-padding{

    padding:70px 0;

}

#hero{

    text-align:center;

}

#hero h1{

    font-size:42px !important;

}

#hero p{

    font-size:16px;

}

.hero-phone{

    margin-top:50px;

    width:260px;

}

.section-title h2{

    font-size:32px;

}

#about{

    text-align:center;

}

#about h2{

    font-size:32px;

}

#about ul{

    margin-top:30px;

}

.cta-box{

    padding:60px 25px;

}

.cta-box h2{

    font-size:34px;

}

.primary-btn{

    width:100%;

}

.secondary-btn{

    width:100%;

}

#hero .flex{

    flex-direction:column;

}

footer{

    text-align:center;

}

}


@media (max-width:480px){

.hero-tag{

    font-size:13px;

}

#hero h1{

    font-size:36px !important;

}

.section-title h2{

    font-size:28px;

}

#about h2{

    font-size:28px;

}

.cta-box h2{

    font-size:30px;

}

.feature-card{

    padding:30px 22px;

}

.feature-card i{

    font-size:34px;

}

.primary-btn{

    height:56px;

    font-size:16px;

}

.secondary-btn{

    height:56px;

    font-size:16px;

}

}


/* Large Desktop */

@media (min-width:1400px){

.container-custom{

    max-width:1320px;

}

.hero-phone{

    width:430px;

}

#hero h1{

    font-size:78px;

}

}
/* Mobile Optimization */
@media (max-width:768px){

    /* Hero整体下移，避免顶部标签贴导航 */
    .hero {
        padding-top:80px;
    }

    /* 标签间距优化 */
    .hero .badge,
    .hero .tag,
    .hero span:first-child {
        margin-bottom:25px;
    }

    /* 标题移动端优化 */
    .hero h1 {
        font-size:42px;
        line-height:1.1;
        letter-spacing:-1px;
    }

    /* 描述文字 */
    .hero p {
        font-size:16px;
        line-height:1.7;
        margin-top:20px;
    }

    /* 按钮区域 */
    .hero .primary-btn,
    .hero .secondary-btn {
        width:100%;
        height:56px;
        font-size:17px;
        border-radius:14px;
    }

    /* 减少按钮之间距离 */
    .hero a {
        margin-top:15px;
    }

    /* 页面左右留白 */
    .container {
        padding-left:20px;
        padding-right:20px;
    }

    /* 图片区域 */
    .hero img {
        max-width:90%;
        margin:30px auto 0;
    }

    /* 统计数字 */
    .stats {
        margin-top:30px;
    }

}