/* 基础样式设置 */

:root {
    --primary: #ff6b6b;
    --primary-dark: #ee5253;
    --secondary: #48dbfb;
    --secondary-dark: #0abde3;
    --tertiary: #feca57;
    --dark: #2c3e50;
    --darker: #1e272e;
    --light: #f5f6fa;
    --gray: #a4b0be;
    --success: #1dd1a1;
    --warning: #ff9f43;
    --text-white: #ffffff;
    --text-dark: #2f3542;
    --border-radius: 10px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--light);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.page-wrapper {
    position: relative;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

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

.highlight {
    color: var(--primary);
    font-weight: 700;
}

/* 按钮样式 */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    outline: none;
    font-size: 14px;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary), var(--primary-dark));
    color: var(--text-white);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 107, 107, 0.4);
}

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

.btn-outline:hover {
    background-color: var(--primary);
    color: var(--text-white);
    transform: translateY(-3px);
}

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

.btn-login:hover {
    background-color: var(--secondary);
    color: var(--text-white);
}

.btn-register {
    background: linear-gradient(45deg, var(--secondary), var(--secondary-dark));
    color: var(--text-white);
    box-shadow: 0 4px 15px rgba(72, 219, 251, 0.3);
}

.btn-register:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(72, 219, 251, 0.4);
}

.btn-lg {
    padding: 14px 30px;
    font-size: 16px;
}

.btn-xl {
    padding: 16px 36px;
    font-size: 18px;
}

/* 头部导航 */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--light);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.site-header.sticky {
    background-color: rgba(245, 246, 250, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.site-header.hide {
    transform: translateY(-100%);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    width: auto;
}

.main-nav {
    display: flex;
}

.nav-list {
    display: flex;
    gap: 30px;
}

.nav-list a {
    font-weight: 600;
    color: var(--dark);
    position: relative;
    padding: 5px 0;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--primary);
}

.nav-list a:hover::after,
.nav-list a.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 25px;
    position: relative;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--dark);
    border-radius: 3px;
    position: absolute;
    left: 0;
    transition: var(--transition);
}

.menu-toggle span:nth-child(1) {
    top: 0;
}

.menu-toggle span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.menu-toggle span:nth-child(3) {
    bottom: 0;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* 移动端导航菜单 */

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background-color: var(--light);
    z-index: 1001;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-container {
    padding: 80px 30px 30px;
}

.mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mobile-nav-list a {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.mobile-nav-list a:hover,
.mobile-nav-list a.active {
    color: var(--primary);
}

.mobile-actions {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mobile-actions .btn {
    width: 100%;
}

.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

body.menu-open {
    overflow: hidden;
}

/* 英雄区域 */

.hero-section {
    position: relative;
    padding: 160px 0 100px;
    background-color: var(--light);
    overflow: hidden;
}

.hero-section .hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
}

.hero-section .hero-decoration {
    position: absolute;
    top: 80px;
    right: 0;
    width: 45%;
    height: calc(100% - 80px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1;
}

.hero-section .hero-decoration .hero-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.hero-section .hero-title {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--dark);
    white-space: nowrap;
    overflow: visible;
    width: 100%;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: var(--gray);
}

.hero-actions {
    display: flex;
    gap: 20px;
}

/* 特色区域 */

.features-section {
    padding: 80px 0;
    background-color: var(--light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--text-white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.feature-icon {
    margin: 0 auto 20px;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 107, 107, 0.1);
    border-radius: 50%;
    margin-top: -50px;
    margin-bottom: 20px;
}

.feature-icon .emoji-icon {
    font-size: 48px;
}

.feature-icon img {
    width: 48px;
    height: 48px;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--dark);
}

.feature-text {
    color: var(--gray);
}

/* 部分标题 */

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 15px;
    color: var(--dark);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
}

.section-header.light .section-title,
.section-header.light .section-subtitle {
    color: var(--text-white);
}

/* 促销活动区域 */

.promotions-section {
    padding: 100px 0;
    background-color: var(--text-white);
}

.promotions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

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

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

.promotion-image {
    position: relative;
    height: 200px;
    background-color: var(--primary-light);
    overflow: hidden;
}

.promotion-icon-container {
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
}

.promotion-icon {
    font-size: 80px;
    color: var(--text-white);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.promotion-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.promotion-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--primary);
    color: var(--text-white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 2;
}

.promotion-content {
    padding: 25px;
}

.promotion-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--dark);
}

.promotion-text {
    color: var(--gray);
    margin-bottom: 20px;
}

/* VIP区域 */

.vip-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--dark), var(--darker));
    color: var(--text-white);
}

.vip-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.vip-info {
    flex: 1;
    min-width: 300px;
}

.vip-info-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
}

.vip-info-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--primary);
}

.vip-benefits-list {
    margin-bottom: 40px;
}

.vip-benefits-list li {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.benefit-icon {
    font-size: 1.5rem;
    margin-right: 15px;
}

.benefit-text {
    font-size: 1.1rem;
}

.vip-levels {
    flex: 2;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.vip-level-card {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

.vip-level-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.level-header {
    padding: 20px;
    text-align: center;
}

.level-header.bronze {
    background: linear-gradient(45deg, #cd7f32, #e6b17f);
}

.level-header.silver {
    background: linear-gradient(45deg, #c0c0c0, #e6e6e6);
}

.level-header.gold {
    background: linear-gradient(45deg, #ffd700, #ffecb3);
}

.level-header.diamond {
    background: linear-gradient(45deg, #b9f2ff, #a5f3eb);
}

.level-icon {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.level-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--dark);
}

.level-benefits {
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.1);
}

.level-benefits p {
    margin-bottom: 10px;
    font-size: 0.9rem;
}

/* 现金返还区域 */

.cashback-section {
    padding: 100px 0;
    background-color: var(--light);
}

.cashback-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
}

.cashback-image {
    flex: 1;
    min-width: 300px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.cashback-icon-container {
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--success) 0%, var(--primary) 100%);
    height: 300px;
}

.cashback-icon {
    font-size: 120px;
    color: var(--text-white);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.cashback-image img {
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.cashback-info {
    flex: 1;
    min-width: 300px;
}

.cashback-info-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--dark);
}

.cashback-steps {
    margin-bottom: 30px;
}

.step {
    display: flex;
    margin-bottom: 25px;
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--primary);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-right: 15px;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--dark);
}

.step-content p {
    color: var(--gray);
}

.cashback-note {
    font-style: italic;
    color: var(--gray);
    margin-bottom: 20px;
}

/* 邀请好友区域 */

.referral-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
    color: var(--text-white);
}

.referral-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
}

.referral-info {
    flex: 1;
    min-width: 300px;
}

.referral-info-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 15px;
}

.referral-info-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--text-white);
}

.referral-steps {
    margin-bottom: 30px;
}

.referral-steps .step-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    flex-shrink: 0;
}

.referral-steps .step-emoji {
    font-size: 20px;
}

.referral-steps .step-content h4 {
    color: var(--text-white);
}

.referral-steps .step-content p {
    color: rgba(255, 255, 255, 0.8);
}

.referral-bonus {
    margin-bottom: 30px;
}

.bonus-card {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
}

.bonus-amount {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--tertiary);
}

.bonus-text {
    font-size: 1.1rem;
}

.referral-image {
    flex: 1;
    min-width: 300px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.referral-icon-container {
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    height: 300px;
}

.referral-icon {
    font-size: 120px;
    color: var(--text-white);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.referral-image img {
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* 行动召唤区域 */

.cta-section {
    padding: 80px 0;
    background: linear-gradient(45deg, var(--primary-dark), var(--primary));
    text-align: center;
    color: var(--text-white);
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.cta-text {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* 页脚 */

.site-footer {
    background-color: var(--darker);
    color: var(--text-white);
    padding-top: 80px;
}

.footer-top {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.footer-nav-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-nav-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--primary);
}

.footer-nav-list li {
    margin-bottom: 10px;
}

.footer-nav-list a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-nav-list a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding: 30px 0;
    text-align: center;
}

.copyright {
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.5);
}

.disclaimer {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* 移动端底部按钮 */

.mobile-actions-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--text-white);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 999;
    padding: 8px;
}

.mobile-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: 6px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 2px solid transparent;
}

.login-btn {
    background-color: var(--light);
    color: var(--dark);
    margin-right: 5px;
    border-color: var(--secondary);
}

.register-btn {
    background: linear-gradient(45deg, var(--primary), var(--primary-dark));
    color: var(--text-white);
    margin-left: 5px;
    border-color: var(--primary-dark);
}

.btn-text {
    font-size: 0.9rem;
    font-weight: 600;
}

/* 响应式设计 */

@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.3rem;
    }
    .section-title {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    .menu-toggle {
        display: block;
    }
    .header-actions .btn {
        display: none;
    }
    .hero-section {
        padding: 120px 0 80px;
    }
    .hero-section .hero-decoration {
        position: relative;
        top: 0;
        width: 100%;
        height: auto;
        margin-top: 40px;
        opacity: 1;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: space-around;
    }
    .hero-section .hero-decoration .hero-image {
        width: 100%;
        max-width: 300px;
        max-height: 300px;
        object-fit: contain;
    }
    .hero-section .hero-content {
        text-align: center;
        margin: 0 auto;
        width: 100%;
        padding: 0 10px;
    }
    .hero-title {
        font-size: 1.8rem;
        width: 100%;
    }
    .hero-actions {
        justify-content: center;
        flex-direction: column;
    }
    .section-title {
        font-size: 2rem;
    }
    .vip-content,
    .cashback-content,
    .referral-content {
        flex-direction: column;
    }
    .referral-content {
        flex-direction: column-reverse;
    }
    .vip-info-title,
    .cashback-info-title,
    .referral-info-title {
        font-size: 1.8rem;
    }
    .vip-info-title::after,
    .referral-info-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .vip-info,
    .cashback-info,
    .referral-info {
        text-align: center;
    }
    .vip-benefits-list li,
    .step {
        justify-content: center;
    }
    .mobile-actions-bar {
        display: flex;
    }
    .site-footer {
        padding-bottom: 80px;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 1.5rem;
        letter-spacing: -0.5px;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .feature-card {
        padding: 20px;
    }
    .feature-icon {
        width: 60px;
        height: 60px;
    }
    .feature-icon img {
        width: 32px;
        height: 32px;
    }
    .feature-title {
        font-size: 1.3rem;
    }
    .promotion-title {
        font-size: 1.3rem;
    }
    .vip-levels {
        grid-template-columns: 1fr;
    }
    .footer-nav {
        flex-direction: column;
        gap: 30px;
    }
    .footer-nav-title {
        text-align: center;
    }
    .footer-nav-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .footer-nav-list {
        text-align: center;
    }
}