/* ================= GLOBAL RESET & BASE ================= */
.formalizer-home-wrapper {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--theme-palette-color-3);
    background-color: var(--theme-palette-color-7);
    line-height: 1.6;
    overflow-x: hidden;
}

.f-container {
    max-width: 1600px; 
    width: 95%;        
    margin: 0 auto;
    padding: 0 20px;
}

.f-text-center { text-align: center; }

/* ================= HERO SECTION ================= */
.f-hero {
    padding: 80px 0 60px;
    text-align: center;
    background-color: var(--theme-palette-color-7);
}

.f-main-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    color: var(--theme-palette-color-1);
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.f-highlight { color: var(--theme-palette-color-2); }

.f-subtitle {
    font-size: 1.3rem;
    color: var(--theme-palette-color-3);
    max-width: 900px;
    margin: 0 auto 50px;
}

/* Tool Container */
.f-tool-container {
    background: #ffffff;
    border: 1px solid var(--theme-palette-color-5);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 20px 40px -10px rgba(0,0,0,0.08);
    margin: 0 auto 40px;
    max-width: 1400px;
    width: 100%;
    min-height: 200px;
}

.f-small-text {
    font-size: 0.85rem;
    color: var(--theme-palette-color-5);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ================= INTRO TEXT ================= */
.f-intro-text {
    padding: 60px 0;
    background-color: #ffffff;
}
.f-intro-text h2 {
    color: var(--theme-palette-color-1);
    font-size: 2.2rem;
    margin-bottom: 20px;
}
.f-intro-text p {
    max-width: 900px; 
    margin: 0 auto;
    font-size: 1.1rem;
}

/* ================= PERSONAS SECTION (Strict 3 Cols) ================= */
.f-personas {
    padding: 80px 0;
    background-color: var(--theme-palette-color-7);
    border-top: 1px solid var(--theme-palette-color-5);
    border-bottom: 1px solid var(--theme-palette-color-5);
}

.f-section-header {
    text-align: center;
    margin-bottom: 50px;
}
.f-section-header h2 {
    font-size: 2.2rem;
    color: var(--theme-palette-color-4);
    margin-bottom: 10px;
}
.f-section-header p {
    max-width: 900px;
    margin: 0 auto;
    font-size: 1.1rem;
    color: var(--theme-palette-color-3);
}

.f-persona-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* 强制3列 */
    gap: 30px;
}

a.f-persona-card {
    display: block;
    text-decoration: none;
    background: #ffffff;
    border: 1px solid var(--theme-palette-color-5);
    border-radius: 16px;
    padding: 35px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

a.f-persona-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 30px -5px rgba(0, 0, 0, 0.08);
    border-color: var(--theme-palette-color-2);
}

.f-card-top-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
}

.f-persona-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
}

.f-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background-color: #e2e8f0;
    background-size: cover;
    background-position: center top;
    border: 3px solid var(--theme-palette-color-5);
}

.f-persona-title h3 {
    font-size: 1.4rem;
    color: var(--theme-palette-color-4);
    margin: 0 0 4px 0;
}

.f-tag {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
}

.f-persona-bio {
    font-size: 1rem;
    color: var(--theme-palette-color-3);
    margin-bottom: 25px;
    line-height: 1.7;
}

.f-specialties {
    font-size: 0.9rem;
    padding-top: 20px;
    border-top: 1px solid var(--theme-palette-color-5);
    color: var(--theme-palette-color-3);
}
.f-specialties strong { color: var(--theme-palette-color-1); }

/* ================= DEEP CONTENT (Strict 2x2 Cols) ================= */
.f-deep-content {
    padding: 80px 0;
    background-color: #ffffff;
}

.f-content-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* 强制2列 */
    gap: 60px 80px;
    max-width: 1400px;
    margin: 0 auto;
}

.f-content-col h3 {
    color: var(--theme-palette-color-1);
    margin-bottom: 15px;
    font-size: 1.6rem;
}

.f-content-col p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--theme-palette-color-3);
}

/* ================= NEW SECTION: NICHES (Grid) ================= */
.f-niches {
    padding: 80px 0;
    background-color: var(--theme-palette-color-7);
    border-top: 1px solid var(--theme-palette-color-5);
}

.f-niche-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.f-niche-item {
    background: #ffffff;
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--theme-palette-color-5);
    transition: transform 0.2s;
}

.f-niche-item:hover {
    transform: translateY(-3px);
    border-color: var(--theme-palette-color-2);
}

.f-niche-item h4 {
    color: var(--theme-palette-color-1);
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.f-niche-item p {
    font-size: 0.95rem;
    color: var(--theme-palette-color-3);
    margin: 0;
}

/* ================= HOW IT WORKS ================= */
.f-how-it-works {
    padding: 80px 0;
    background-color: #ffffff; /* Alternate bg color */
}

.f-steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    text-align: center;
}

.f-step-num {
    background: var(--theme-palette-color-1);
    color: #fff;
    width: 48px;
    height: 48px;
    line-height: 48px;
    border-radius: 50%;
    margin: 0 auto 20px;
    font-weight: 800;
    font-size: 1.2rem;
}

.f-step h4 {
    margin-bottom: 15px;
    font-size: 1.25rem;
    color: var(--theme-palette-color-4);
}

/* ================= NEW SECTION: STANDARD (Banner) ================= */
.f-standard {
    padding: 60px 0;
    background-color: var(--theme-palette-color-7);
}

.f-standard-box {
    background-color: var(--theme-palette-color-1); /* Dark Theme Color */
    color: #ffffff;
    padding: 60px;
    border-radius: 20px;
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
}

.f-standard-box h2 {
    color: #ffffff;
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.f-standard-box p {
    color: #cbd5e1; /* Light gray for dark bg */
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 40px;
}

.f-standard-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    font-weight: 700;
}

/* ================= FAQ SECTION ================= */
.f-faq {
    padding: 80px 0;
    background-color: #ffffff;
}

.f-faq-grid {
    max-width: 900px;
    margin: 0 auto;
}

.f-faq-item {
    margin-bottom: 40px;
}

.f-faq-item h4 {
    color: var(--theme-palette-color-1);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

/* ================= RESPONSIVE (MOBILE) ================= */
@media (max-width: 900px) {
    /* 强制恢复单列，否则手机上看会很挤 */
    .f-persona-grid,
    .f-content-grid,
    .f-steps-grid {
        grid-template-columns: 1fr; 
    }
    
    .f-main-title { font-size: 2.5rem; }
    .f-tool-container { padding: 15px; }
    .f-container { width: 100%; }
    
    .f-content-grid { gap: 40px; }
    
    .f-standard-box { padding: 30px; }
    .f-standard-features { flex-direction: column; gap: 10px; }
}