:root{--primary-color:#2B3A67;--secondary-color:#FF7F50;--text-color:#333;--light-bg:#f8f9fa;--dark-bg:#4A5783;--font-size-base:14px;--font-size-lg:1.1rem;--font-size-xl:1.25rem;--font-size-xxl:1.5rem;--font-size-sm:0.875rem;--font-size-xs:0.75rem}body{background:#f5f5f5;color:var(--text-color);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.navbar{padding:.8rem 0;transition:all .3s ease;background:linear-gradient(135deg,var(--primary-color) 0,var(--dark-bg) 100%)!important}.navbar-brand{color:#fff!important;font-size:1.2rem;font-weight:600;display:flex;align-items:center}.navbar-toggler{padding:.4rem;border:2px solid rgba(255,255,255,.5);border-radius:4px;transition:all .3s ease}.navbar-toggler:focus{box-shadow:none;border-color:var(--secondary-color)}.navbar-toggler-icon{background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e")!important}.navbar-nav{margin-left:auto}.nav-link{color:rgba(255,255,255,.9)!important;font-weight:500;padding:.5rem 1rem!important;transition:all .3s ease;position:relative;display:flex;align-items:center;gap:.5rem}.nav-link:hover{color:var(--secondary-color)!important}.nav-link::after{content:'';position:absolute;bottom:0;left:50%;width:0;height:2px;background:var(--secondary-color);transition:all .3s ease;transform:translateX(-50%)}.nav-link:hover::after{width:80%}.hero-section{background:linear-gradient(135deg,var(--primary-color) 0,var(--dark-bg) 100%);color:#fff;padding:1.5rem 0;text-align:left;margin-bottom:0;margin-top:0;position:relative}.hero-title{font-size:2rem;font-weight:700;margin-bottom:.5rem;text-align:left}.hero-subtitle{font-size:1rem;color:rgba(255,255,255,.9);text-align:left}.section-title{color:var(--primary-color);font-size:1.25rem;font-weight:700;margin-bottom:0;display:flex;align-items:center;gap:.5rem}.section-number{background:var(--primary-color);color:#fff;width:35px;height:35px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;margin-right:.8rem;font-size:1.25rem}.price-box{padding:.8rem;margin-bottom:.8rem}.energy-amount{color:var(--secondary-color);font-size:1.8rem;font-weight:700}.energy-pool{background:#fff;padding:1rem;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.05);margin-top:2rem}.energy-pool p{margin-bottom:.2rem;font-size:.85rem}.energy-pool .energy-amount{font-size:2.5rem;line-height:1.2;display:inline-block}.energy-pool small{font-size:.75rem;color:#666;margin-left:.5rem}.address-box{background:var(--light-bg);padding:1.2rem;border-radius:10px;display:flex;flex-direction:column;gap:1rem}.address-container{width:100%}.address-item{width:100%}.address-label{font-size:1rem;color:var(--text-color);font-weight:500;margin-bottom:.5rem}.address-value-wrapper{display:flex;align-items:center;gap:.5rem;background:var(--light-bg);padding:.75rem;border-radius:8px;width:100%}.address-value{font-family:monospace;font-size:.9rem;color:var(--text-color);word-break:break-all;flex:1;min-width:0;padding:.25rem 0}.copy-btn{background:var(--secondary-color);border:none;color:#fff;padding:.5rem;border-radius:6px;cursor:pointer;transition:all .3s ease;display:flex;align-items:center;justify-content:center;min-width:40px;flex-shrink:0}.copy-btn:hover{background:#ff6a3c;transform:translateY(-1px)}.copy-btn:active{transform:translateY(0)}.copy-toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(100px);background:rgba(0,0,0,.8);color:#fff;padding:12px 24px;border-radius:4px;font-size:14px;z-index:1000;opacity:0;transition:all .3s ease}.copy-toast.show{transform:translateX(-50%) translateY(0);opacity:1}.list-unstyled li{color:#666;line-height:1.8;margin-bottom:.8rem;font-size:1rem}.exchange-section{text-align:left;padding:2.5rem 0;background:var(--light-bg);border-radius:15px;margin:1.5rem 0}.exchange-rate{display:flex;align-items:center;justify-content:center;gap:1.5rem;margin:1.5rem 0}.currency-box{background:#fff;padding:1rem 1.5rem;border-radius:10px;text-align:center;box-shadow:0 2px 10px rgba(0,0,0,.05);min-width:150px}.currency-box h5{color:var(--primary-color);margin-bottom:.8rem;font-weight:600;text-align:center}.currency-box .h3{color:var(--secondary-color);font-weight:700;font-size:1.8rem}.currency-box input{text-align:left!important;margin-left:0;padding-left:0}.accordion-item{border:none;background:var(--light-bg);border-radius:10px!important;margin-bottom:.5rem;overflow:hidden}.accordion-button{padding:.8rem}.accordion-button:not(.collapsed){background-color:var(--light-bg);color:var(--primary-color);box-shadow:none}.accordion-button:focus{box-shadow:none;border-color:rgba(0,0,0,.125)}.accordion-body{padding:.8rem}.feature-icon{background:var(--light-bg);width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;margin-right:.8rem;flex-shrink:0;margin-top:2px}@media (max-width:768px){.hero-title{font-size:1.8rem}.hero-subtitle{font-size:1rem}.exchange-rate{flex-direction:column;gap:1rem}.currency-box{padding:1.5rem;width:100%;min-width:auto}.address-box{padding:1rem}.address-label{font-size:.9rem}.address-value{font-size:.8rem}.address-value-wrapper{padding:.5rem}.copy-btn{padding:.4rem}}@media (max-width:320px){.address-value{font-size:.75rem}.copy-btn svg{width:16px;height:16px}}html{font-size:14px;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{width:100%;padding-right:15px;padding-left:15px;margin-right:auto;margin-left:auto}img{max-width:100%;height:auto}.navbar-brand img{height:30px;width:auto;margin-right:10px}.main-content{background:#fff;border-radius:15px;padding:1rem;margin-bottom:2rem;box-shadow:0 2px 15px rgba(0,0,0,.05);width:100%}.alert-info{background-color:var(--light-bg);border:none;color:var(--text-color);border-radius:8px;padding:1.5rem;margin:1.5rem auto;width:100%;box-shadow:0 2px 10px rgba(0,0,0,.05)}.alert-info h6{font-weight:500;color:var(--primary-color);text-align:left}.features .col-12{margin-bottom:20px!important}.features .col-12:last-child{margin-bottom:0!important}.features h4.h5{font-size:1rem;margin-bottom:.5rem}.features p{font-size:.9rem;margin-bottom:0}.payment-notice{color:coral;font-size:1rem;margin-bottom:1.5rem;line-height:2;padding:.5rem 0}.payment-steps{display:flex;flex-direction:column;gap:.2rem;margin-bottom:.5rem;font-size:.85rem}.payment-steps p{margin:0;line-height:1.4}h2.mb-4,h2.text-center,p.text-center{text-align:left}.platform-intro{text-align:left}.exchange-section h2,.exchange-section p{text-align:center}#usdtAmount{text-align:center!important;border:none;background:0 0;font-size:2rem;font-weight:700;width:150px}.currency-box{width:200px!important;height:120px!important;display:flex!important;flex-direction:column!important;justify-content:center!important;padding:1rem 1.5rem!important}.currency-box #usdtAmount,.currency-box .h3{font-size:2rem!important;margin:0!important;text-align:center!important;width:100%!important}.currency-box h5{margin-bottom:1rem!important}.back-to-top{position:fixed;right:15px;bottom:15px;transform:translateY(0);width:40px;height:40px;background-color:coral;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;text-decoration:none;cursor:pointer;transition:all .3s ease;z-index:1000;opacity:0;visibility:hidden;box-shadow:0 2px 10px rgba(255,127,80,.3)}.back-to-top:hover{background-color:tomato;transform:translateY(-3px);box-shadow:0 4px 15px rgba(255,127,80,.4)}.back-to-top.show{opacity:1;visibility:visible}.back-to-top svg{width:20px;height:20px;fill:white}@media screen and (max-width:768px){html{font-size:12px}}@media screen and (min-width:1200px){html{font-size:16px}}@media (min-width:576px){.container{width:100%}}@media (min-width:768px){.container{width:100%}}@media (min-width:992px){.container{width:100%}}@media (min-width:1200px){.container{width:100%}}.platform-intro p{color:#666;line-height:1.8;margin-bottom:.8rem!important;font-size:.9rem}.feature-icon svg{fill:var(--secondary-color);width:20px;height:20px}@media (max-width:768px){.address-group{flex-direction:column;align-items:flex-start;gap:8px}.address-label-inline{font-size:1rem}.address-value-inline{font-size:.9rem}}.alert-info h6.m-0.text-center{text-align:left!important}.address-box,.address-label,.address-value,.payment-notice,.payment-steps{text-align:left}.exchange-rate .h3{margin-top:2rem}@media (max-width:991px){html{font-size:var(--font-size-base)}body{font-size:.95rem;line-height:1.5}.navbar-collapse{background:linear-gradient(135deg,var(--primary-color) 0,var(--dark-bg) 100%);padding:1rem;border-radius:0 0 15px 15px;margin-top:.5rem;box-shadow:0 4px 15px rgba(0,0,0,.1)}.navbar-nav{padding:.5rem 0}.nav-item{margin:.2rem 0}.nav-link{font-size:1rem;padding:.7rem 1rem!important;border-radius:8px;transition:all .3s ease;display:flex;align-items:center;gap:.8rem}.nav-link:hover{background:rgba(255,255,255,.1);padding-left:1.5rem!important}.nav-link::after{display:none}.navbar-toggler{margin-right:.5rem}.navbar-brand{font-size:1.1rem}.navbar-brand img{height:25px}.hero-title{font-size:1.3rem;line-height:1.4;margin-bottom:.6rem;font-weight:600}.hero-subtitle{font-size:.95rem;line-height:1.4}.section-title{font-size:1.15rem;margin-bottom:.8rem;gap:.8rem}.list-unstyled li{font-size:.95rem;line-height:1.5;margin-bottom:.8rem}.energy-amount{font-size:1.4rem}.price-box p{font-size:.95rem;line-height:1.5}.payment-notice{font-size:1rem;line-height:1.5;margin:1.2rem 0}.address-label{font-size:1rem;margin-bottom:.4rem}.address-value{font-size:.9rem;line-height:1.3}.currency-box h4{font-size:1.1rem}.currency-box #usdtAmount,.currency-box .h3{font-size:1.6rem!important}.platform-intro p{font-size:.95rem;line-height:1.6;margin-bottom:.8rem!important;text-indent:1.6em}.accordion-button{font-size:1rem;padding:.8rem}.accordion-body{font-size:.95rem;line-height:1.6;padding:.8rem}.features h4.h5{font-size:1.1rem;margin-bottom:.4rem}.features p{font-size:.95rem;line-height:1.5}.alert-info h6{font-size:.95rem;line-height:1.5}.main-content{padding:1.2rem;margin-bottom:1.2rem}.section-title{margin-bottom:1rem}.mb-3{margin-bottom:.8rem!important}.mb-4{margin-bottom:1.2rem!important}}@media (max-width:375px){html{font-size:13px}.hero-title{font-size:1.2rem}.hero-subtitle{font-size:.9rem}.section-title{font-size:1.1rem}.energy-amount{font-size:1.3rem}.currency-box #usdtAmount,.currency-box .h3{font-size:1.4rem!important}.address-value{font-size:.85rem}}.navbar-collapse{transition:all .3s ease-in-out}.navbar-collapse.collapsing{opacity:0}.navbar-collapse.show{opacity:1}h2{display:flex;align-items:center;gap:.5rem}@media (min-width:992px){.nav-link:hover{transform:translateY(-2px)}}

/* 移动端响应式布局优化 */
@media (max-width: 768px) {
    .exchange-rate {
        flex-direction: row;
        flex-wrap:nowrap !important;
        align-items: center;
    }
    
    .exchange-arrow {
        transform: rotate(90deg);
        margin: 15px 0;
    }
    
    .currency-box {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .address-value-wrapper {
        flex-direction: column;
    }
    
    .address-value {
        word-break: break-all;
        margin-bottom: 10px;
    }
    
    .copy-btn {
        align-self: flex-end;
    }
    
    .main-content {
        padding: 20px 15px;
    }
}

/* 确保 exchange-rate 在所有设备上都有正确的 flex 布局 */
.exchange-rate {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

/* 确保 features 在移动端有更好的间距 */
.features .col {
    margin-bottom: 20px;
}

/* 优化地址显示在移动端的样式 */
@media (max-width: 576px) {
    .address-value-wrapper {
        flex-direction: column;
        align-items: stretch;
    }
    
    .address-value {
        padding: 8px;
        background: rgba(255,255,255,0.5);
        border-radius: 6px;
        margin-bottom: 8px;
    }
    
    .copy-btn {
        width: 100%;
        padding: 8px;
    }
    
    /* 改善兑换区域在超小屏幕上的显示 */
    .currency-box {
        height: auto !important;
        padding: 15px !important;
    }
    
    /* 确保FAQ部分在小屏幕上更易读 */
    .accordion-button {
        font-size: 0.95rem;
        padding: 12px 15px;
    }
}

/* 特性卡片的响应式布局优化 */
.features .col {
    margin-bottom: 20px;
}

@media (min-width: 576px) {
    .features .d-flex {
        height: 100%;
    }
    
    .features .col {
        display: flex;
    }
}

@media (max-width: 767px) {
    .features .feature-icon {
        width: 36px;
        height: 36px;
    }
    
    .features h4.h5 {
        font-size: 1rem;
        margin-bottom: 0.3rem;
    }
    
    .features p {
        font-size: 0.85rem;
        line-height: 1.4;
    }
}

/* 移动端下列表项和导航菜单横向排列 - 整合版 */
@media (max-width: 768px) {
  /* 通用横向列表 */
  ul.horizontal-mobile {
    display: flex;
    flex-wrap: wrap;
    padding-left: 0;
    list-style: none;
    margin-bottom: 0;
  }
  
  ul.horizontal-mobile li {
    flex: 0 0 50%;  /* 每行两个项目 */
    padding: 8px;
    box-sizing: border-box;
    font-size: 0.85rem;
    line-height: 1.4;
    background: rgba(255,255,255,0.5);
    border-radius: 6px;
    margin-bottom: 10px;
  }
  
  /* 警告文本样式 */
  ul.horizontal-mobile li.warning-text {
    flex: 0 0 100%;  /* 警告文本占满一行 */
    background: rgba(255,127,80,0.1);
    border-left: 3px solid var(--secondary-color);
  }
  
  /* 导航菜单样式 */
  .navbar-collapse {
    max-height: none;
    background: linear-gradient(135deg,var(--primary-color) 0,var(--dark-bg) 100%);
    border-radius: 0 0 15px 15px;
  }
  
  .navbar-nav {
    flex-direction: row !important;
    flex-wrap: wrap;
    justify-content: center;
    padding: 10px 0;
  }
  
  .navbar-nav .nav-item {
    margin: 5px;
    flex: 0 0 auto;
  }
  
  .navbar-nav .nav-link {
    padding: 8px 12px !important;
    background: rgba(255,255,255,0.1);
    border-radius: 20px;
    font-size: 0.9rem;
    text-align: center;
    min-width: auto;
    white-space: nowrap;
  }
  
  .navbar-nav .nav-link:hover {
    background: rgba(255,255,255,0.2);
    transform: none !important;
  }
}