/* Global Styles */
:root {
    --primary-color: #0066FF;
    --primary-hover: #0052cc;
    --text-color: #111111;
    --text-light: #555555;
    --bg-color: #FFFFFF;
    --bg-gray: #F5F7FA;
    --border-color: #E0E0E0;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

body {
    font-family: var(--font-family);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

ul {
    list-style: none;
}

/* Utilities */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-sm {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.bg-gray { background-color: var(--bg-gray); }

.section {
    padding: 80px 0;
    scroll-margin-top: 90px;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 40px;
    text-align: center;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-text {
    background: none;
    color: var(--primary-color);
    padding: 0;
    display: inline;
}
.btn-text:hover {
    text-decoration: underline;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-color);
}

.nav-links {
    display: flex;
    gap: 25px;
}

.nav-links a {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
}
.nav-links a:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    padding: 120px 0 100px; /* Extra top padding for fixed nav */
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.hero .subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.badges {
    margin-bottom: 40px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
}

.badge {
    background: #eef4ff;
    color: var(--primary-color);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

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

/* Services Grid */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 30px;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}
.service-card .price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.check-list li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
    color: var(--text-light);
    font-size: 0.95rem;
}
.check-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* Pricing Section */
.pricing-card {
    display: flex;
    flex-direction: column;
}

.pricing-card .card-header {
    margin-bottom: 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.pricing-card .price-tag {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-color);
}
.pricing-card .price-tag span {
    font-size: 1rem;
    font-weight: normal;
    color: var(--text-light);
}

.pricing-card .desc {
    color: var(--text-light);
    text-align: center;
    margin-bottom: 30px;
    flex-grow: 1;
}

.pricing-card .actions {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Process Section */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    display: flex;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item .num {
    width: 50px;
    height: 50px;
    background: #fff;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    z-index: 1;
    flex-shrink: 0;
}

.timeline-item .content {
    margin-left: 30px;
    padding-top: 10px;
}
.timeline-item h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.note-box {
    text-align: center;
    color: var(--text-light);
    background: #fff8e1;
    padding: 15px;
    border-radius: var(--radius-md);
    max-width: 600px;
    margin: 20px auto 0;
    font-size: 0.9rem;
}

/* Cases Section */
.case-card {
    padding: 0;
    overflow: hidden;
}

.img-placeholder {
    height: 160px;
    background-color: #ddd;
    background-size: cover;
    background-position: center;
}

.case-info {
    padding: 20px;
}

.case-info .tags {
    margin: 10px 0;
}

.tag {
    background: var(--bg-gray);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-right: 5px;
    color: #666;
}

.meta {
    font-size: 0.85rem;
    color: #888;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

/* FAQ */
.accordion-item {
    border-bottom: 1px solid var(--border-color);
}

.question {
    padding: 20px;
    font-weight: 600;
    cursor: pointer;
    position: relative;
}
.question::after {
    content: "+";
    position: absolute;
    right: 20px;
    font-weight: 400;
}

.accordion-item.active .question::after {
    content: "-";
}

.answer {
    padding: 0 20px 20px;
    color: var(--text-light);
    display: none; /* Controlled by JS */
}
.accordion-item.active .answer {
    display: block;
}

/* Warning Section */
.warning-section {
    padding: 40px 0;
    background-color: #fff4f4; /* Light red bg */
}

.warning-box {
    text-align: center;
}

.warning-box h2 {
    color: #d32f2f;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.warning-list {
    display: inline-block;
    text-align: left;
    margin-bottom: 20px;
}
.warning-list li {
    margin-bottom: 8px;
    font-weight: 500;
}

.highlight {
    font-weight: 700;
    color: var(--text-color);
}

/* Contact Section */
.contact-info {
    margin-bottom: 40px;
}
.contact-info p {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.form-box {
    background: #fff;
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}
.form-box h3 {
    margin-bottom: 20px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0,102,255,0.1);
}

.form-hint {
    font-size: 0.85rem;
    color: #888;
    text-align: center;
    margin-top: 15px;
}

/* Footer */
.footer {
    background: #111;
    color: #888;
    padding: 40px 0;
    text-align: center;
    font-size: 0.9rem;
}
.footer p { margin-bottom: 10px; }
.footer a { color: #ccc; text-decoration: underline; }

/* Responsive Media Queries */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* Simple mobile nav assumption: hide links or make burger */
    }
    
    .hero h1 { font-size: 2.2rem; }
    
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .hero-cta { flex-direction: column; }
    
    .navbar .btn { display: none; } /* Hide header CTA on mobile, use hero CTA */

    .timeline::before { left: 20px; }
    .timeline-item .num { width: 40px; height: 40px; font-size: 1rem; }
    
    .mobile-only-hint { display: block !important; }
}