:root {
    --primary: #2563eb;
    --secondary: #7c3aed;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #64748b;
    --success: #10b981;
    --accent: #f97316;
    --card-bg: #ffffff;
    --card-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html, body {
    width: 100%;
    overflow-x: hidden;
    background-color: #f1f5f9;
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    width: 100%;
}

.logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
}

.logo {
    height: 60px;
    width: auto;
    max-width: 100%;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 20px;
    animation: fadeIn 1s ease;
    padding: 0 10px;
    word-wrap: break-word;
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.5rem;
    max-width: 800px;
    margin: 0 auto 40px;
    opacity: 0.9;
    padding: 0 15px;
    word-wrap: break-word;
    font-weight: 400;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    padding: 0 10px;
}

.btn {
    padding: 15px 30px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    min-width: 200px;
}

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

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

.btn-outline {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-outline:hover {
    background-color: white;
    color: var(--primary);
}

/* Why Section */
.section {
    padding: 80px 0;
    width: 100%;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--dark);
    padding: 0 15px;
    word-wrap: break-word;
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
}

.why-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    width: 100%;
}

.problem-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-5px);
}

.problem-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.problem-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark);
}

/* Features */
.features {
    background-color: white;
}

.features-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--light);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 20px;
}

.feature-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--dark);
}

/* How It Works */
.how-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 300px;
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.step-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark);
}

/* Benefits */
.benefits-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.benefit-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.benefit-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Image Sections - 优化文本样式 */
.image-section {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
    margin: 60px 0;
}

.image-content {
    flex: 1;
    min-width: 300px;
    background: var(--card-bg);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--card-shadow);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.image-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.image-content h2 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 20px;
    border-bottom: 3px solid var(--accent);
    padding-bottom: 10px;
    display: inline-block;
}

.image-content p {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--dark);
    margin-bottom: 25px;
}

.image-content ul {
    list-style: none;
    padding: 0;
}

.image-content ul li {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    margin-bottom: 12px;
    padding-left: 30px;
    position: relative;
    color: var(--dark);
}

.image-content ul li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
    font-size: 1.2rem;
}

.image-placeholder {
    flex: 1;
    min-width: 300px;
    height: 300px;
    background: linear-gradient(45deg, #e0e7ff, #c7d2fe);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-weight: bold;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* Final CTA */
.final-cta {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    text-align: center;
    padding: 80px 0;
}

.final-cta .section-title {
    color: white;
}

/* Footer */
footer {
    background: var(--dark);
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-contact, .footer-channels, .footer-note {
    flex: 1;
    min-width: 250px;
}

.footer-title {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #ffd700;
}

.channel-link {
    color: white;
    margin-right: 15px;
    font-size: 1.5rem;
    text-decoration: none;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--gray);
    color: var(--gray);
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}