:root {
    --primary: #1479f7;
    --primary-dark: #0d66d0;
    --primary-light: #e6f2ff;
    --secondary: #00a1e9;
    --light: #f7faff;
    --dark: #1a1a1a;
    --gray: #666;
    --light-gray: #e6e6e6;
    --white: #fff;
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    --radius: 12px;
    --transition: all 0.3s ease;
    --bonus-10: #00a1e9;
    --bonus-20: #8a2be2;
    --bonus-30: #ff4757;
    --bonus-50: linear-gradient(135deg, #ffd700, #ffa500);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

body {
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
    padding-bottom: 40px;
    overflow-x: hidden;
}

.container {
    max-width: 750px;
    margin: 0 auto;
    padding: 0 15px;
}

header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: 20px 0 50px;
    border-radius: 0 0 20px 20px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.logo-area {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.logo {
    width: 50px;
    height: 50px;
    background: var(--white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.5s ease;
}

.logo:hover {
    transform: rotate(15deg);
}

.logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
}

.logo-text {
    font-size: 20px;
    font-weight: bold;
}

.english-subtitle {
    font-size: 12px;
    opacity: 0.8;
    margin-top: 2px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

h1 {
    font-size: 24px;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.subtitle {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 20px;
}

.latest-orders {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(5px);
    padding: 12px 15px;
    overflow: hidden;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.orders-container {
    height: 20px;
    overflow: hidden;
    position: relative;
    width: 100%;
    text-align: center;
}

.orders-track {
    display: flex;
    flex-direction: column;
    transition: transform 0.5s ease;
}

.order-item {
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    animation: fadeInUp 0.5s ease forwards;
}

.order-qq {
    font-weight: bold;
    margin-right: 8px;
}

.order-detail {
    display: flex;
    align-items: center;
}

.order-amount {
    font-weight: bold;
    margin: 0 4px;
}

.order-time {
    font-size: 12px;
    opacity: 0.9;
    margin-left: 8px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-container {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin: 15px 0;
    overflow: hidden;
}

.nav-menu {
    display: flex;
    list-style: none;
    width: 100%;
    justify-content: flex-start;
    padding: 0 15px;
}

.nav-item {
    text-align: center;
    position: relative;
    margin-right: 20px;
}

.nav-item:last-child {
    margin-right: 0;
}

.nav-link {
    display: block;
    padding: 12px 8px;
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    z-index: 1;
    font-size: 14px;
    white-space: nowrap;
    cursor: pointer;
}

.nav-link:hover {
    color: var(--primary);
    transform: translateY(-2px);
    cursor: pointer;
}

.nav-link.active {
    color: var(--primary);
    cursor: pointer;
}

.nav-indicator {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
    transition: var(--transition);
}

.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
    margin-bottom: 18px;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
}

.card-title {
    font-size: 17px;
    font-weight: bold;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    color: var(--primary);
}

.card-title i {
    margin-right: 8px;
    font-size: 18px;
}

.account-input {
    margin-bottom: 20px;
}

.input-group {
    position: relative;
    margin-bottom: 12px;
}

.input-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 14px;
}

.input-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--light-gray);
    border-radius: var(--radius);
    font-size: 15px;
    transition: var(--transition);
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(20, 121, 247, 0.2);
    outline: none;
    transform: scale(1.02);
}

.package-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 15px;
}

.package-option {
    border: 2px solid var(--light-gray);
    border-radius: var(--radius);
    padding: 12px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.package-option:hover {
    border-color: var(--primary);
    transform: scale(1.03);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.package-option.active {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: scale(1.05);
}

.package-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255, 215, 0, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 80% 70%, rgba(255, 215, 0, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 40% 80%, rgba(255, 215, 0, 0.05) 0%, transparent 15%);
    opacity: 0.6;
    z-index: 0;
}

.package-qcoins {
    font-size: 16px;
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.coin-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 10px;
    height: 10px;
    margin-right: 6px;
    background: radial-gradient(circle at 30% 30%, #ffd700, #daa520);
    border-radius: 50%;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.coin-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.8), transparent 70%);
    border-radius: 50%;
}

.package-bonus {
    font-size: 13px;
    color: var(--secondary);
    margin-bottom: 6px;
    font-weight: 500;
    position: relative;
    z-index: 1;
}

.package-amount {
    font-size: 15px;
    font-weight: bold;
    color: var(--dark);
    padding-top: 6px;
    border-top: 1px dashed var(--light-gray);
    position: relative;
    z-index: 1;
}

.package-tag {
    position: absolute;
    top: 0;
    right: 0;
    color: var(--white);
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 0 var(--radius) 0 var(--radius);
    z-index: 1;
    font-weight: bold;
}

.package-tag.bonus-10 {
    background: var(--bonus-10);
}

.package-tag.bonus-20 {
    background: var(--bonus-20);
}

.package-tag.bonus-30 {
    background: var(--bonus-30);
}

.package-tag.bonus-50 {
    background: var(--bonus-50);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.custom-amount {
    margin-top: 12px;
}

.custom-input {
    display: flex;
    align-items: center;
}

.custom-input input {
    flex: 1;
    margin-right: 8px;
    padding: 10px 12px;
}

.custom-input button {
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    padding: 10px 16px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.custom-input button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.custom-input button:disabled {
    background: var(--light-gray);
    color: var(--gray);
    cursor: not-allowed;
    transform: none;
}

.payment-options {
    display: flex;
    gap: 12px;
    margin-top: 12px;
}

.payment-option {
    flex: 1;
    border: 2px solid var(--light-gray);
    border-radius: var(--radius);
    padding: 12px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.payment-option:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.payment-option.active {
    border-color: var(--primary);
    background: var(--primary-light);
}

.payment-icon {
    font-size: 22px;
    margin-bottom: 6px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 30px;
}

.payment-icon img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.payment-name {
    font-size: 13px;
    font-weight: 500;
}

.action-buttons {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.btn {
    flex: 1;
    padding: 14px;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(20, 121, 247, 0.3);
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(20, 121, 247, 0.3);
}

.btn-secondary {
    background: var(--light-gray);
    color: var(--dark);
}

.btn-secondary:hover {
    background: #ddd;
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.btn-secondary:active {
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
}

.expandable-section {
    margin-top: 20px;
}

.expandable-header {
    background: var(--primary-light);
    border-radius: var(--radius);
    padding: 15px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    border-left: 4px solid var(--primary);
}

.expandable-header:hover {
    background: rgba(20, 121, 247, 0.1);
    transform: translateY(-2px);
}

.expandable-title {
    font-size: 16px;
    font-weight: bold;
    color: var(--primary);
    display: flex;
    align-items: center;
}

.expandable-title i {
    margin-right: 8px;
    font-size: 18px;
}

.expandable-icon {
    transition: var(--transition);
    font-size: 18px;
}

.expandable-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: var(--white);
    border-radius: 0 0 var(--radius) var(--radius);
}

.expandable-content.active {
    max-height: 500px;
    padding: 15px;
    border: 1px solid var(--primary-light);
    border-top: none;
}

.bonus-list {
    list-style: none;
}

.bonus-list li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    transition: var(--transition);
}

.bonus-list li:hover {
    background: var(--primary-light);
    padding-left: 10px;
}

.bonus-list li:last-child {
    border-bottom: none;
}

.intro-section {
    margin-bottom: 18px;
}

.intro-content {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.intro-item {
    flex: 1;
    min-width: 140px;
    background: var(--primary-light);
    border-radius: var(--radius);
    padding: 12px;
    text-align: center;
    transition: var(--transition);
}

.intro-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.intro-icon {
    font-size: 22px;
    margin-bottom: 8px;
    color: var(--primary);
}

.intro-title {
    font-size: 15px;
    font-weight: bold;
    margin-bottom: 4px;
    color: var(--primary);
}

.intro-desc {
    font-size: 12px;
    color: var(--gray);
}

.faq-item {
    margin-bottom: 15px;
    border-bottom: 1px solid var(--light-gray);
    padding-bottom: 15px;
    transition: var(--transition);
}

.faq-item:hover {
    background: var(--primary-light);
    border-radius: var(--radius);
    padding: 10px;
    margin-bottom: 10px;
}

.faq-question {
    font-weight: bold;
    margin-bottom: 8px;
    color: var(--dark);
    font-size: 15px;
    display: flex;
    align-items: center;
}

.faq-question::before {
    content: '❓';
    margin-right: 8px;
    font-size: 16px;
}

.faq-answer {
    color: var(--gray);
    font-size: 14px;
    line-height: 1.5;
}

.site-footer {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-top: 25px;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 15px;
}

.footer-link {
    color: var(--gray);
    text-decoration: none;
    font-size: 13px;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--primary);
    transform: translateY(-2px);
}

.footer-info {
    color: var(--gray);
    font-size: 12px;
    line-height: 1.6;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.delay-1 { animation-delay: 0.1s; opacity: 0; }
.delay-2 { animation-delay: 0.2s; opacity: 0; }
.delay-3 { animation-delay: 0.3s; opacity: 0; }
.delay-4 { animation-delay: 0.4s; opacity: 0; }

@media (max-width: 480px) {
    .package-options {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .package-option {
        padding: 10px 8px;
    }
    
    .package-qcoins {
        font-size: 14px;
    }
    
    .package-bonus {
        font-size: 12px;
    }
    
    .package-amount {
        font-size: 14px;
    }
    
    .payment-options {
        flex-direction: column;
    }
    
    .intro-content {
        grid-template-columns: repeat(2, 1fr);
        display: grid;
    }
    
    .intro-item {
        min-width: auto;
        padding: 10px;
    }
    
    .intro-title {
        font-size: 14px;
    }
    
    .intro-desc {
        font-size: 11px;
    }
    
    .nav-menu {
        padding: 0 10px;
    }
    
    .nav-item {
        margin-right: 15px;
    }
    
    .order-item {
        font-size: 12px;
    }
    
    .order-time {
        display: none;
    }
}

@media (max-width: 360px) {
    .package-options {
        grid-template-columns: 1fr;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
    }
}
.btn-third {
    width: 33.33%;
    min-width: 120px;
    max-width: 240px;
    margin: 0 auto;
    display: block;
}