/* ========================================
   现代专业商务风格 - 微扑克俱乐部
   配色：深蓝 + 金色
   ======================================== */

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS变量 - 专业商务配色 */
:root {
    /* 主色调 - 深蓝 */
    --primary-dark: #1a3d5c;
    --primary-blue: #2c5f8d;
    --primary-light: #4a90c5;
    
    /* 强调色 - 金色 */
    --accent-gold: #d4af37;
    --accent-gold-light: #e8c547;
    --accent-gold-dark: #b8941f;
    
    /* 中性色 */
    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #e9ecef;
    --gray-200: #dee2e6;
    --gray-300: #ced4da;
    --gray-400: #adb5bd;
    --gray-500: #6c757d;
    --gray-600: #495057;
    --gray-700: #343a40;
    --gray-800: #212529;
    
    /* 功能色 */
    --success: #28a745;
    --info: #17a2b8;
    --warning: #ffc107;
    
    /* 背景色 */
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-dark: #0f1923;
    
    /* 文字颜色 */
    --text-primary: #2c3e50;
    --text-secondary: #5a6c7d;
    --text-muted: #95a5a6;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
    
    /* 边框 */
    --border-radius: 12px;
    --border-color: #e5e7eb;
    
    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 全局字体 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 
                 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   头部导航
   ======================================== */
.header {
    background: var(--white);
    padding: 20px 0;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.logo i {
    color: var(--accent-gold);
    font-size: 1.8rem;
}

.header-badges {
    display: flex;
    gap: 12px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    background: var(--gray-50);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.badge i {
    color: var(--accent-gold);
}

/* ========================================
   Hero 区域
   ======================================== */
.hero-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 100%);
    padding: 80px 24px;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="2" height="2" x="48" y="48" fill="rgba(255,255,255,0.05)"/></svg>');
    opacity: 0.4;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 48px;
    opacity: 0.95;
    font-weight: 300;
    letter-spacing: 0.05em;
}

.club-number-display {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-xl);
    display: inline-block;
    min-width: 400px;
}

.club-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.club-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--primary-dark);
    letter-spacing: 0.15em;
    margin-bottom: 24px;
    font-family: 'Courier New', monospace;
}

.copy-btn {
    background: var(--accent-gold);
    color: var(--white);
    border: none;
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.copy-btn:hover {
    background: var(--accent-gold-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.copy-btn:active {
    transform: translateY(0);
}

/* ========================================
   主内容区
   ======================================== */
.main-content {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 16px;
}

/* ========================================
   数据展示区
   ======================================== */
.stats-section {
    margin-bottom: 80px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 32px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--accent-gold);
}

.stat-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.75rem;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-dark);
    line-height: 1.2;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ========================================
   认证展示区
   ======================================== */
.certification-section {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 32px;
    margin-bottom: 80px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.cert-badges {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.cert-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--gray-50);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.cert-item:hover {
    background: var(--white);
    border-color: var(--accent-gold);
}

.cert-item i {
    font-size: 1.5rem;
    color: var(--accent-gold);
}

.cert-item span {
    font-weight: 600;
    color: var(--text-primary);
}

/* ========================================
   核心优势区
   ======================================== */
.features-section {
    margin-bottom: 80px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.feature-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-color: var(--accent-gold);
}

.feature-header {
    margin-bottom: 24px;
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-dark);
}

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

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.feature-list li i {
    color: var(--success);
    flex-shrink: 0;
}

/* ========================================
   用户评价区
   ======================================== */
.testimonials-section {
    margin-bottom: 80px;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.testimonial-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--accent-gold);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.user-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.user-info {
    flex: 1;
}

.user-name {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.user-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.rating {
    display: flex;
    gap: 4px;
}

.rating i {
    color: var(--accent-gold);
    font-size: 0.875rem;
}

.testimonial-text {
    color: var(--text-secondary);
    line-height: 1.8;
    font-style: italic;
}

/* ========================================
   安全保障区
   ======================================== */
.security-section {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
    border-radius: var(--border-radius);
    padding: 64px 48px;
    margin-bottom: 80px;
    color: var(--white);
}

.security-section .section-title {
    color: var(--white);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.security-item {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    padding: 32px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.security-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.security-icon {
    width: 64px;
    height: 64px;
    background: var(--accent-gold);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.75rem;
    margin-bottom: 20px;
}

.security-item h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--white);
}

.security-item p {
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
    font-size: 0.9375rem;
}

/* ========================================
   加入步骤区
   ======================================== */
.steps-section {
    margin-bottom: 80px;
}

.steps-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-top: 48px;
    flex-wrap: wrap;
}

.step-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 32px 24px;
    flex: 1;
    min-width: 250px;
    max-width: 300px;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.step-card:hover {
    border-color: var(--accent-gold);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.step-number {
    position: absolute;
    top: -16px;
    left: 24px;
    width: 40px;
    height: 40px;
    background: var(--accent-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 1.125rem;
    box-shadow: var(--shadow-md);
}

.step-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2rem;
    margin: 16px auto 20px;
}

.step-card h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 12px;
}

.step-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9375rem;
}

.step-card strong {
    color: var(--accent-gold);
}

.step-divider {
    color: var(--accent-gold);
    font-size: 1.5rem;
    flex-shrink: 0;
}

/* ========================================
   FAQ区
   ======================================== */
.faq-section {
    margin-bottom: 80px;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.faq-item {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--accent-gold);
}

.faq-item h4 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 12px;
}

.faq-item h4 i {
    color: var(--accent-gold);
    flex-shrink: 0;
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9375rem;
}

/* ========================================
   联系方式区
   ======================================== */
.contact-section {
    margin-bottom: 80px;
    text-align: center;
}

.contact-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 48px;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.contact-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px 32px;
    display: flex;
    align-items: center;
    gap: 24px;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border-color);
    transition: var(--transition);
    text-align: left;
}

.contact-card:hover {
    border-color: var(--accent-gold);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.contact-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-info-text {
    flex: 1;
}

.contact-info-text h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.contact-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-gold);
    margin-bottom: 8px;
    font-family: 'Courier New', monospace;
}

.contact-tip {
    display: inline-block;
    padding: 4px 12px;
    background: var(--gray-50);
    border-radius: 12px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ========================================
   CTA区域
   ======================================== */
.cta-section {
    margin-bottom: 80px;
}

.cta-box {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
    border-radius: var(--border-radius);
    padding: 64px 48px;
    text-align: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.cta-box h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-box > p {
    font-size: 1.125rem;
    margin-bottom: 32px;
    opacity: 0.9;
}

.cta-button {
    background: var(--accent-gold);
    color: var(--white);
    border: none;
    padding: 18px 48px;
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
}

.cta-button:hover {
    background: var(--accent-gold-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.cta-button:active {
    transform: translateY(-2px);
}

.cta-benefits {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.cta-benefits span {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9375rem;
    opacity: 0.9;
}

.cta-benefits i {
    color: var(--accent-gold);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--primary-dark);
    color: var(--white);
    padding: 48px 0 24px;
    margin-top: 80px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto 32px;
    padding: 0 24px;
    flex-wrap: wrap;
    gap: 32px;
}

.footer-brand {
    flex: 1;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-logo i {
    color: var(--accent-gold);
    font-size: 1.5rem;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
}

.footer-info {
    text-align: right;
}

.footer-notice {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.8);
}

.footer-notice i {
    color: var(--accent-gold);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.footer-keywords {
    text-align: center;
    padding: 24px 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   模态弹窗
   ======================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    padding: 24px;
}

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

.modal-container {
    background: var(--white);
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    transform: scale(0.9);
    transition: var(--transition);
    position: relative;
}

.modal-overlay.active .modal-container {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: var(--gray-100);
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.125rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
    color: var(--white);
    padding: 48px 40px 32px;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.modal-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.modal-header p {
    opacity: 0.9;
    font-size: 1rem;
}

.modal-body {
    padding: 40px;
}

.modal-step {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
}

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

.modal-step-content h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.modal-step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-club-box {
    background: var(--gray-50);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 32px;
    text-align: center;
    margin: 32px 0;
}

.modal-club-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-dark);
    letter-spacing: 0.2em;
    margin-bottom: 20px;
    font-family: 'Courier New', monospace;
}

.modal-copy-btn {
    background: var(--accent-gold);
    color: var(--white);
    border: none;
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.modal-copy-btn:hover {
    background: var(--accent-gold-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.modal-tip {
    background: rgba(212, 175, 55, 0.1);
    border-left: 4px solid var(--accent-gold);
    border-radius: 8px;
    padding: 20px;
    display: flex;
    gap: 16px;
    margin-top: 32px;
}

.modal-tip i {
    color: var(--accent-gold);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.modal-tip strong {
    display: block;
    color: var(--text-primary);
    font-weight: 700;
    margin-bottom: 4px;
}

.modal-tip p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin: 0;
}

.modal-tip .highlight {
    color: var(--accent-gold);
    font-weight: 700;
}

.modal-footer {
    padding: 24px 40px 40px;
    text-align: center;
}

.modal-btn-close {
    background: var(--primary-dark);
    color: var(--white);
    border: none;
    padding: 14px 48px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.modal-btn-close:hover {
    background: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   复制成功提示
   ======================================== */
.copy-success {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--success);
    color: var(--white);
    padding: 20px 40px;
    border-radius: var(--border-radius);
    font-size: 1.125rem;
    font-weight: 600;
    z-index: 10000;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: fadeInOut 2s ease-in-out;
}

@keyframes fadeInOut {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.8);
    }
    20% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
    80% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.8);
    }
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.75rem;
    }
    
    .club-number-display {
        min-width: 350px;
    }
    
    .club-number {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .header-badges {
        display: none;
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .hero-section {
        padding: 60px 24px;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .club-number-display {
        min-width: auto;
        padding: 32px 24px;
    }
    
    .club-number {
        font-size: 2.5rem;
    }
    
    .main-content {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stats-grid,
    .features-grid,
    .testimonials-grid,
    .security-grid,
    .faq-grid,
    .contact-cards {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .steps-container {
        flex-direction: column;
    }
    
    .step-divider {
        transform: rotate(90deg);
    }
    
    .security-section,
    .cta-box {
        padding: 48px 32px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-info {
        text-align: center;
    }
    
    .modal-header {
        padding: 40px 24px 24px;
    }
    
    .modal-header h2 {
        font-size: 1.5rem;
    }
    
    .modal-body {
        padding: 32px 24px;
    }
    
    .modal-club-number {
        font-size: 2.25rem;
    }
    
    .modal-footer {
        padding: 20px 24px 32px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.875rem;
    }
    
    .club-number {
        font-size: 2rem;
        letter-spacing: 0.1em;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-benefits {
        flex-direction: column;
        gap: 16px;
    }
}

/* ========================================
   滚动条美化
   ======================================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}