/* Base Styles */
:root {
    --primary-color: #4facfe;
    --secondary-color: #00f2fe;
    --dark-color: #1a1a2e;
    --light-color: #f8f9fa;
    --text-color: #444;
    --white: #fff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Hero Section */
.supply-hero {
    background: linear-gradient(135deg, var(--dark-color) 0%, #16213e 100%);
    color: var(--white);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.supply-hero .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.supply-hero .hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.supply-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
    color: var(--white);
}

.supply-hero .hero-subtitle {
    font-size: 1.2rem;
    color: #e0e0e0;
    margin-bottom: 40px;
    line-height: 1.6;
}

.supply-hero .cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 30px;
}

/* Buttons */
.btn {
    padding: 15px 30px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(45deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    color: var(--white);
    border: none;
}

.btn-outline {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.btn-large {
    font-size: 1.1rem;
    padding: 18px 36px;
}

/* Hero Image */
.supply-hero .hero-image {
    margin-top: 60px;
    text-align: center;
    position: relative;
}

.supply-hero .hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Key Features Section */
.key-features {
    padding: 120px 0 80px;
    background: var(--light-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

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

.feature-card h3 {
    font-size: 1.2rem;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-color);
    line-height: 1.6;
}

/* Challenges Section */
.challenges-section {
    padding: 100px 0;
    background: var(--light-color);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
    padding: 0 20px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--dark-color);
    margin-bottom: 20px;
    line-height: 1.3;
}

.section-header h2 span {
    color: var(--primary-color);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-color);
    line-height: 1.6;
}

.challenges-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.challenges-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 20px;
}

/* Guarantee Section */
.guarantee-section {
    margin: 60px 0;
}

.guarantee-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.guarantee-content h2 {
    font-size: 2rem;
    color: var(--dark-color);
    margin-bottom: 20px;
    line-height: 1.3;
}

.guarantee-content h2 span {
    color: var(--primary-color);
}

.guarantee-content p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 30px;
    line-height: 1.6;
}

.accuracy-badge {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    background: linear-gradient(45deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    padding: 20px;
    border-radius: 12px;
    color: var(--white);
}

.accuracy-badge span:first-child {
    font-size: 2.5rem;
    font-weight: 700;
}

.accuracy-badge span:last-child {
    font-size: 1rem;
}

.guarantee-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

/* Demand Types */
.demand-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.demand-card {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

.demand-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.demand-card h4 {
    font-size: 1.2rem;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.demand-card p {
    color: var(--text-color);
    line-height: 1.6;
}

/* Specific Challenges */
.specific-challenges {
    margin-top: 60px;
}

.specific-challenges h3 {
    font-size: 1.8rem;
    color: var(--dark-color);
    margin-bottom: 30px;
    text-align: center;
}

.challenge-list {
    display: grid;
    gap: 20px;
}

.challenge-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--white);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.challenge-item:hover {
    transform: translateX(5px);
}

.challenge-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.challenge-item span {
    font-size: 1.1rem;
    color: var(--text-color);
    line-height: 1.4;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .supply-hero h1 {
        font-size: 2.5rem;
    }

    .guarantee-card {
        grid-template-columns: 1fr;
    }

    .guarantee-image {
        order: -1;
    }

    .section-header h2 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .supply-hero {
        padding: 60px 0;
    }

    .supply-hero h1 {
        font-size: 2rem;
    }

    .supply-hero .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .challenge-item {
        padding: 15px;
    }

    .challenge-item span {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .supply-hero h1 {
        font-size: 1.8rem;
    }

    .section-header h2 {
        font-size: 1.6rem;
    }

    .guarantee-content h2 {
        font-size: 1.8rem;
    }
}