/* 全局样式 */
:root {
    --primary-color: #4f75ff;
    --primary-gradient: linear-gradient(135deg, #4f75ff 0%, #3b5bff 100%);
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --purple-color: #6f42c1;
    --light-bg: #f8f9fa;
    --border-radius: 0.75rem;
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* 渐变背景 */
.bg-gradient-primary {
    background: var(--primary-gradient);
}

.bg-gradient {
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--success-color) 100%);
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    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 xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-buttons .btn {
    padding: 0.75rem 2rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.hero-buttons .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.hero-stats .stat-item {
    padding: 1rem;
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.hero-stats .stat-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

/* Calculator Preview */
.calculator-preview {
    max-width: 400px;
    margin: 0 auto;
    border: none;
    transition: all 0.3s ease;
}

.calculator-preview:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.calculator-icon {
    width: 40px;
    height: 40px;
}

.metric-card {
    transition: all 0.3s ease;
}

.metric-card:hover {
    transform: scale(1.05);
}

/* User Count Display */
.user-count-display {
    padding: 1rem 0;
}

.user-count-number {
    position: relative;
    overflow: hidden;
}

#userCountDisplay {
    font-family: 'Segoe UI', 'Arial', monospace;
    letter-spacing: -2px;
    text-shadow: 0 2px 4px rgba(79, 117, 255, 0.3);
    display: inline-block;
    transition: all 0.3s ease;
    animation: counter-glow 3s infinite ease-in-out;
}

/* 数字发光动画 */
@keyframes counter-glow {
    0%, 100% {
        text-shadow: 0 2px 4px rgba(79, 117, 255, 0.3);
    }
    50% {
        text-shadow: 0 4px 8px rgba(79, 117, 255, 0.6), 0 0 20px rgba(79, 117, 255, 0.3);
    }
}

/* 数字跳动效果 */
@keyframes number-bounce {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.user-count-number.updating #userCountDisplay {
    animation: number-bounce 0.5s ease-in-out;
}

.user-count-label {
    color: #6c757d;
    font-weight: 500;
}

/* 用户数量增长指示器 */
.count-indicator {
    position: absolute;
    top: -10px;
    right: -10px;
    background: #28a745;
    color: white;
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 10px;
    animation: fadeInOut 2s infinite;
}

@keyframes fadeInOut {
    0%, 100% {
        opacity: 0;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(-5px);
    }
}

/* Feature Cards */
.feature-card {
    background: white;
    border-radius: var(--border-radius);
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 80px;
    height: 80px;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
}

/* Pricing Cards */
.pricing-card {
    border: 1px solid #e9ecef;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.pricing-badge {
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--warning-color);
    color: white;
    padding: 5px 40px;
    font-size: 0.8rem;
    font-weight: bold;
    transform: rotate(45deg);
    z-index: 2;
}

.price {
    font-size: 2.5rem;
    font-weight: bold;
    margin: 1rem 0;
}

.price .currency {
    font-size: 1.2rem;
    vertical-align: top;
}

.price .period {
    font-size: 1rem;
    color: #6c757d;
}

.pricing-features li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* Contact Section */
.contact-item {
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
}

.contact-item i {
    transition: all 0.3s ease;
}

.contact-item:hover i {
    transform: scale(1.2);
}

/* 导航栏 */
.navbar {
    backdrop-filter: blur(20px);
    background-color: rgba(255, 255, 255, 0.95) !important;
}

.navbar-brand {
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

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

/* 按钮样式 */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 0.5rem 1.5rem;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: var(--primary-gradient);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    background: linear-gradient(135deg, #3b5bff 0%, #4f75ff 100%);
}

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

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-light {
    background: white;
    color: var(--primary-color);
    font-weight: 600;
}

.btn-light:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #ff8c00 100%);
    border: none;
    color: white;
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* 表单样式 */
.form-control {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(79, 117, 255, 0.25);
}

.form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.5rem;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.card-header {
    background: var(--light-bg);
    border-bottom: 1px solid #e9ecef;
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
}

/* 表格样式 */
.table {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table thead th {
    background: var(--primary-color);
    color: white;
    border: none;
    font-weight: 600;
}

.table tbody tr {
    transition: all 0.3s ease;
}

.table tbody tr:hover {
    background-color: rgba(79, 117, 255, 0.05);
}

/* 模态框样式 */
.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
}

.modal-header {
    border-bottom: 1px solid #e9ecef;
    padding: 1.5rem;
}

.modal-title {
    font-weight: 600;
    color: var(--primary-color);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid #e9ecef;
    padding: 1.5rem;
}

/* 进度条样式 */
.progress {
    border-radius: var(--border-radius);
    background-color: #e9ecef;
}

.progress-bar {
    border-radius: var(--border-radius);
    background: var(--primary-gradient);
}

/* 标签样式 */
.badge {
    border-radius: var(--border-radius);
    padding: 0.5rem 0.75rem;
    font-weight: 600;
}

/* 工具提示样式 */
.tooltip-inner {
    background: var(--primary-color);
    border-radius: var(--border-radius);
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-section {
        min-height: auto;
        padding: 3rem 0;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons .btn {
        display: block;
        width: 100%;
        margin-bottom: 1rem;
    }
    
    .feature-card {
        margin-bottom: 2rem;
    }
    
    .pricing-card {
        margin-bottom: 2rem;
    }
    
    .calculator-preview {
        margin-top: 2rem;
    }
}

/* 颜色辅助类 */
.text-purple {
    color: var(--purple-color) !important;
}

.bg-purple {
    background-color: var(--purple-color) !important;
}

/* 阴影辅助类 */
.shadow-custom {
    box-shadow: var(--shadow) !important;
}

.shadow-custom-lg {
    box-shadow: var(--shadow-lg) !important;
}

/* 边框圆角辅助类 */
.rounded-custom {
    border-radius: var(--border-radius) !important;
}