/* 智学管家 - 自定义样式 */

/* ===== 基础变量 ===== */
:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --secondary: #F59E0B;
    --secondary-dark: #D97706;
    --dark: #111827;
    --light: #F9FAFB;
    --gray: #6B7280;
}

/* ===== 全局样式 ===== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #1F2937;
}

/* ===== 导航栏 ===== */
.navbar-scrolled {
    background-color: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar-scrolled .nav-link {
    color: #1F2937 !important;
}

.navbar-scrolled .logo-text {
    color: #4F46E5 !important;
}

/* ===== Hero区背景动画 ===== */
.hero-gradient {
    background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #EC4899 100%);
    position: relative;
    overflow: hidden;
}

.hero-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

/* 浮动形状 */
.floating-shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: floatShape 15s ease-in-out infinite;
}

.floating-shape:nth-child(1) {
    width: 300px;
    height: 300px;
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.floating-shape:nth-child(2) {
    width: 200px;
    height: 200px;
    bottom: -50px;
    left: -50px;
    animation-delay: -5s;
}

.floating-shape:nth-child(3) {
    width: 150px;
    height: 150px;
    top: 50%;
    left: 20%;
    animation-delay: -10s;
}

@keyframes floatShape {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(20px, -20px) scale(1.05); }
    50% { transform: translate(-10px, 20px) scale(0.95); }
    75% { transform: translate(-20px, -10px) scale(1.02); }
}

/* ===== 卡片悬停效果 ===== */
.card-hover {
    transition: all 0.3s ease;
}

.card-hover:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* ===== 定价卡片 ===== */
.pricing-card {
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: scale(1.02);
}

.pricing-card.featured {
    transform: scale(1.05);
    border: 2px solid var(--primary);
}

.pricing-card.featured:hover {
    transform: scale(1.07);
}

/* ===== 功能图标 ===== */
.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
    color: white;
    font-size: 28px;
    margin-bottom: 1rem;
}

/* ===== 数字动画 ===== */
.counter {
    font-variant-numeric: tabular-nums;
}

/* ===== Tab切换 ===== */
.tab-btn {
    transition: all 0.3s ease;
}

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

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

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

/* ===== 时间线 ===== */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -34px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--primary);
}

/* ===== 渐变文字 ===== */
.gradient-text {
    background: linear-gradient(135deg, #4F46E5 0%, #EC4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 按钮样式 ===== */
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 9999px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    text-decoration: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
    background: white;
    color: var(--primary);
    padding: 0.75rem 2rem;
    border-radius: 9999px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    text-decoration: none;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: transparent;
    color: white;
}

/* ===== 响应式调整 ===== */
@media (max-width: 768px) {
    .hero-gradient {
        padding-top: 100px;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .pricing-card.featured:hover {
        transform: scale(1.02);
    }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ===== 图表容器 ===== */
.chart-container {
    width: 100%;
    height: 300px;
}

@media (min-width: 768px) {
    .chart-container {
        height: 400px;
    }
}

/* ===== 团队成员卡片 ===== */
.team-card {
    text-align: center;
    padding: 2rem;
    border-radius: 1rem;
    background: white;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
}

.team-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    font-weight: bold;
}

/* ===== 表单样式 ===== */
.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #E5E7EB;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* ===== 功能对比表格 ===== */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid #E5E7EB;
}

.comparison-table th {
    background: var(--light);
    font-weight: 600;
}

.comparison-table tr:hover {
    background: rgba(79, 70, 229, 0.05);
}

/* ===== 移动端菜单 ===== */
.mobile-menu {
    display: none;
}

.mobile-menu.active {
    display: block;
}