:root {
            --primary-color: #f7931a; /* 比特币橙色 */
            --secondary-color: #12233c; /* 深蓝色 */
            --accent-color: #00c9a7; /* 加密货币绿色 */
            --light-color: #f8f9fa;
            --dark-color: #1a1a2e;
            --gray-color: #6c757d;
            --danger-color: #e74c3c;
            --success-color: #27ae60;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--dark-color);
            background-color: #f5f7fa;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 头部样式 */
        header {
            background-color: var(--secondary-color);
            color: white;
            padding: 20px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            font-size: 1.8rem;
            font-weight: 700;
        }

        .logo i {
            color: var(--primary-color);
            margin-right: 10px;
        }

        .logo span {
            color: var(--primary-color);
        }

        nav ul {
            display: flex;
            list-style: none;
        }

        nav ul li {
            margin-left: 25px;
        }

        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            padding: 5px 10px;
            border-radius: 4px;
        }

        nav ul li a:hover, nav ul li a.active {
            background-color: var(--primary-color);
            color: var(--secondary-color);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* 英雄区域 */
        .hero {
            background: linear-gradient(135deg, var(--secondary-color) 0%, #0d1b2a 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
            margin-bottom: 40px;
        }

        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 30px;
            color: rgba(255, 255, 255, 0.85);
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .btn {
            display: inline-block;
            padding: 12px 28px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }

        .btn:hover {
            background-color: #e07c0d;
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(0, 0, 0, 0.2);
        }

        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
        }

        .btn-outline:hover {
            background-color: var(--primary-color);
            color: white;
        }

        /* 主要部分 */
        .main-section {
            margin-bottom: 60px;
        }

        .section-title {
            text-align: center;
            margin-bottom: 40px;
            position: relative;
        }

        .section-title h2 {
            font-size: 2.2rem;
            color: var(--secondary-color);
            display: inline-block;
            padding-bottom: 10px;
        }

        .section-title h2::after {
            content: '';
            position: absolute;
            width: 70px;
            height: 4px;
            background-color: var(--primary-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }

        /* 计算器样式 */
        .calculator-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            background-color: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
        }

        .calculator-form {
            padding: 30px;
        }

        .calculator-result {
            padding: 30px;
            background-color: var(--secondary-color);
            color: white;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--secondary-color);
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary-color);
            outline: none;
            box-shadow: 0 0 0 3px rgba(247, 147, 26, 0.2);
        }

        .result-item {
            margin-bottom: 25px;
        }

        .result-label {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 5px;
        }

        .result-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
        }

        /* 模拟器样式 */
        .simulator-container {
            background-color: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
        }

        .simulator-tabs {
            display: flex;
            background-color: var(--secondary-color);
        }

        .simulator-tab {
            padding: 15px 25px;
            color: white;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            flex: 1;
            text-align: center;
        }

        .simulator-tab.active {
            background-color: var(--primary-color);
            color: var(--secondary-color);
        }

        .simulator-content {
            padding: 30px;
            display: none;
        }

        .simulator-content.active {
            display: block;
        }

        .trade-panel {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .trade-inputs {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .trade-buttons {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }

        .btn-buy {
            background-color: var(--success-color);
        }

        .btn-sell {
            background-color: var(--danger-color);
        }

        .market-data {
            background-color: #f8f9fa;
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--accent-color);
        }

        /* 新手指南样式 */
        .guide-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }

        .guide-card {
            background-color: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }

        .guide-card:hover {
            transform: translateY(-10px);
        }

        .guide-card-header {
            background-color: var(--secondary-color);
            color: white;
            padding: 20px;
            text-align: center;
        }

        .guide-card-header i {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: var(--primary-color);
        }

        .guide-card-body {
            padding: 25px;
        }

        .guide-card-body h3 {
            margin-bottom: 15px;
            color: var(--secondary-color);
        }

        .guide-card-body ul {
            padding-left: 20px;
            margin-bottom: 20px;
        }

        .guide-card-body li {
            margin-bottom: 8px;
        }

        /* 常见问答样式 */
        .faq-container {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: white;
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }

        .faq-item:hover {
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
        }

        .faq-question {
            padding: 20px 25px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background-color: white;
            transition: var(--transition);
        }

        .faq-question h3 {
            font-size: 1.2rem;
            color: var(--secondary-color);
            font-weight: 600;
            margin: 0;
            flex: 1;
        }

        .faq-question i {
            color: var(--primary-color);
            font-size: 1.2rem;
            transition: var(--transition);
            margin-left: 15px;
        }

        .faq-question.active {
            background-color: rgba(247, 147, 26, 0.05);
        }

        .faq-question.active i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 25px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            background-color: white;
        }

        .faq-answer.active {
            padding: 0 25px 25px 25px;
            max-height: 500px;
        }

        .faq-answer p {
            color: var(--gray-color);
            line-height: 1.7;
            margin-bottom: 15px;
        }

        .faq-answer ul {
            padding-left: 20px;
            margin-bottom: 15px;
        }

        .faq-answer li {
            margin-bottom: 8px;
            color: var(--gray-color);
        }

        .faq-answer strong {
            color: var(--secondary-color);
        }

        .faq-search {
            margin-bottom: 30px;
            position: relative;
        }

        .faq-search input {
            width: 100%;
            padding: 15px 20px 15px 50px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
        }

        .faq-search i {
            position: absolute;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary-color);
        }

        .faq-categories {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 30px;
        }

        .faq-category {
            padding: 8px 20px;
            background-color: white;
            border: 1px solid #ddd;
            border-radius: 30px;
            cursor: pointer;
            font-weight: 600;
            color: var(--gray-color);
            transition: var(--transition);
        }

        .faq-category:hover, .faq-category.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .faq-contact {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 30px;
            text-align: center;
            box-shadow: var(--box-shadow);
            margin-top: 40px;
        }

        /* 页脚样式 */
        footer {
            background-color: var(--secondary-color);
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-column h3 {
            color: var(--primary-color);
            margin-bottom: 20px;
            font-size: 1.3rem;
        }

        .footer-column ul {
            list-style: none;
        }

        .footer-column ul li {
            margin-bottom: 12px;
        }

        .footer-column ul li a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-column ul li a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }

        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .calculator-container, .trade-panel {
                grid-template-columns: 1fr;
            }
            
            .hero h1 {
                font-size: 2.3rem;
            }
        }

        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                text-align: center;
            }
            
            .logo {
                margin-bottom: 15px;
            }
            
            nav ul {
                flex-direction: column;
                width: 100%;
            }
            
            nav ul li {
                margin: 5px 0;
                width: 100%;
            }
            
            nav ul li a {
                display: block;
                padding: 10px;
            }
            
            .mobile-menu-btn {
                display: block;
                position: absolute;
                right: 20px;
                top: 25px;
            }
            
            .nav-menu {
                display: none;
                width: 100%;
                margin-top: 15px;
            }
            
            .nav-menu.active {
                display: block;
            }
            
            .hero-btns {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                width: 100%;

                max-width: 300px;
            }
            
            .trade-inputs {
                grid-template-columns: 1fr;
            }
            
            .faq-question h3 {
                font-size: 1.1rem;
            }
        }

        @media (max-width: 576px) {
            .hero {
                padding: 50px 0;
            }
            
            .hero h1 {
                font-size: 1.8rem;
            }
            
            .section-title h2 {
                font-size: 1.8rem;
            }
            
            .calculator-form, .calculator-result, .simulator-content {
                padding: 20px;
            }
            
            .simulator-tab {
                padding: 12px 15px;
                font-size: 0.9rem;
            }
            
            .faq-question {
                padding: 15px 20px;
            }
            
            .faq-answer.active {
                padding: 0 20px 20px 20px;
            }
        }
/* 吸底广告栏样式 */
.floating-ad-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--secondary-color) 0%, #0d1b2a 100%);
    color: white;
    z-index: 1000;
    padding: 12px 0;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.3);
    border-top: 2px solid var(--primary-color);
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.floating-ad-nav.hidden {
    transform: translateY(100%);
    opacity: 0;
}

.floating-ad-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
}

/* 广告左侧：APP信息 */
.ad-app-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
    min-width: 250px;
}

.app-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), #ff9900);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    box-shadow: 0 4px 10px rgba(247, 147, 26, 0.3);
}

.app-details h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: white;
}

.app-details p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 5px;
}

.app-rating {
    display: flex;
    align-items: center;
    gap: 8px;
}

.stars {
    color: #ffc107;
}

.rating-text {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
}

/* 广告中间：下载按钮 */
.ad-buttons {
    display: flex;
    gap: 15px;
    flex: 1;
    justify-content: center;
}

.btn-download, .btn-register {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    min-width: 120px;
    justify-content: center;
}

.btn-download {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

.btn-download:hover {
    background-color: #e07c0d;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(247, 147, 26, 0.4);
}

.btn-register {
    background-color: var(--accent-color);
    color: white;
}

.btn-register:hover {
    background-color: #00b394;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 201, 167, 0.4);
}

/* 广告右侧：快捷导航和关闭按钮 */
.ad-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.quick-nav-icons {
    display: flex;
    gap: 10px;
}

.nav-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

.nav-icon:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    transform: translateY(-3px);
}

.nav-icon::after {
    content: attr(title);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--secondary-color);
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 1001;
    margin-bottom: 8px;
}

.nav-icon:hover::after {
    opacity: 1;
}

.ad-close {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.ad-close:hover {
    background-color: rgba(231, 76, 60, 0.8);
    transform: rotate(90deg);
}

/* 弹窗样式 */
.download-modal, .register-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.download-modal.active, .register-modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: white;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    animation: modalSlideIn 0.4s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 20px 25px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: var(--secondary-color);
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--danger-color);
    transform: rotate(90deg);
}

.modal-body {
    padding: 25px;
}

/* 下载选项样式 */
.download-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.download-option {
    text-align: center;
    padding: 25px 20px;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.download-option:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

.download-option i {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.download-option h4 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.download-option p {
    color: var(--gray-color);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.btn-download-option {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.btn-download-option:hover {
    background-color: #e07c0d;
    transform: translateY(-3px);
}

.qr-placeholder {
    width: 120px;
    height: 120px;
    background-color: white;
    border: 2px dashed #ddd;
    border-radius: 8px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.qr-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: 15px;
}

.qr-line {
    height: 2px;
    background-color: #eee;
    width: 100%;
}

.qr-text {
    font-size: 0.8rem;
    color: var(--gray-color);
    z-index: 1;
    background-color: white;
    padding: 0 10px;
}

/* 注册表单样式 */
.register-form {
    max-width: 400px;
    margin: 0 auto;
}

.register-form .form-group {
    margin-bottom: 20px;
}

.register-form .form-control {
    padding: 12px 15px;
    font-size: 1rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-group input {
    margin-right: 10px;
    width: 18px;
    height: 18px;
}

.checkbox-group label {
    font-size: 0.9rem;
    color: var(--gray-color);
}

.checkbox-group a {
    color: var(--primary-color);
    text-decoration: none;
}

.checkbox-group a:hover {
    text-decoration: underline;
}

.btn-register-submit {
    width: 100%;
    padding: 14px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
}

.btn-register-submit:hover {
    background-color: #e07c0d;
    transform: translateY(-3px);
    box-shadow: 0 7px 15px rgba(247, 147, 26, 0.3);
}

.login-link {
    text-align: center;
    margin-top: 20px;
    color: var(--gray-color);
    font-size: 0.9rem;
}

.login-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.login-link a:hover {
    text-decoration: underline;
}

/* 响应式调整 */
@media (max-width: 992px) {
    .floating-ad-content {
        flex-direction: column;
        text-align: center;
    }
    
    .ad-app-info, .ad-buttons, .ad-actions {
        width: 100%;
        justify-content: center;
    }
    
    .download-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .floating-ad-nav {
        padding: 15px 0;
    }
    
    .ad-app-info {
        min-width: auto;
        justify-content: center;
    }
    
    .ad-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn-download, .btn-register {
        min-width: auto;
        width: 100%;
        max-width: 250px;
        margin: 0 auto;
    }
    
    .ad-actions {
        justify-content: center;
    }
    
    .quick-nav-icons {
        gap: 15px;
    }
}

@media (max-width: 576px) {
    .modal-content {
        width: 95%;
    }
    
    .modal-header h3 {
        font-size: 1.3rem;
    }
    
    .download-option {
        padding: 20px 15px;
    }
    
    .download-option i {
        font-size: 2.5rem;
    }
}