:root {
    --bg-color: #ffffff;
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --accent-color: #000000;
    --accent-hover: #333333;
    --btn-text: #ffffff;
    --border-color: #d2d2d7;
    --font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    /* background: var(--text-primary); */
    /* color: var(--bg-color); */
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.logo-icon svg {
    width: 20px;
    height: 20px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 0.95rem;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
    background: var(--text-primary);
    color: var(--btn-text);
}

.btn-sm:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--text-primary);
    color: var(--btn-text);
    padding: 14px 32px;
    font-size: 1.1rem;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-header {
    padding: 10px 24px;
    font-size: 0.95rem;
}

.btn-secondary {
    background: #f5f5f7;
    color: var(--text-secondary);
    padding: 14px 32px;
    font-size: 1.1rem;
    position: relative;
    cursor: not-allowed;
}

.btn-secondary .tooltip {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    opacity: 0.8;
    white-space: nowrap;
}

/* Hero Section */
.hero-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 20px 40px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.hero-content {
    margin-bottom: 60px;
    animation: fadeUp 0.8s ease-out;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    background: linear-gradient(180deg, #1d1d1f 0%, #434344 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    font-weight: 400;
}

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

/* Hero Image */
.hero-image-container {
    width: 100%;
    max-width: 1000px;
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.12);
    animation: fadeUp 1s ease-out 0.2s backwards;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

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

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Reviews Section */
.reviews-section {
    padding: 80px 40px;
    background: #fafafa;
}

.reviews-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.reviews-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.review-card {
    background: white;
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.review-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.review-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
}

.avatar-1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.avatar-2 {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.avatar-3 {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.avatar-4 {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.avatar-5 {
    background: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
}

.avatar-6 {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

.review-info {
    flex: 1;
}

.review-name {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.review-role {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.review-content {
    line-height: 1.7;
    color: var(--text-primary);
    font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .reviews-section {
        padding: 60px 20px;
    }

    .reviews-title {
        font-size: 2rem;
        margin-bottom: 40px;
    }

    .reviews-container {
        grid-template-columns: 1fr;
    }
}