:root {
    --color-white: #FFFFFF;
    --color-emerald: #10B981;
    --color-indigo: #4F46E5;
    --color-gold: #F59E0B;
    --color-gray-light: #F3F4F6;
    --color-gray-medium: #9CA3AF;
    --color-gray-dark: #1F2937;
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.06);
    --max-width: 1200px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
    font-weight: 450;
    line-height: 1.6;
    color: var(--color-gray-dark);
    background-color: var(--color-white);
    background-image: radial-gradient(circle, rgba(16, 185, 129, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    overflow-x: hidden;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    padding: 1.5rem 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-light);
}

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

.logo {
    font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-emerald);
}

.nav {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav__link {
    text-decoration: none;
    color: var(--color-gray-dark);
    font-weight: 450;
    transition: color 0.3s ease;
}

.nav__link:hover {
    color: var(--color-emerald);
}

/* Hero Section */
.hero {
    padding: 6rem 0 8rem;
    position: relative;
}

.hero__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero__text {
    animation: fadeUp 0.8s ease-out;
}

.hero__title {
    font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
    font-size: 4rem;
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-gray-dark);
    margin-bottom: 1rem;
}

.hero__subtitle {
    font-size: 1.5rem;
    color: var(--color-gray-medium);
    margin-bottom: 2.5rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
}

.hero__graphic {
    animation: fadeUp 1s ease-out 0.2s both;
}

/* Value Props */
.value-props {
    padding: 5rem 0;
}

.value-props__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.value-prop {
    background: var(--color-white);
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: var(--shadow-soft);
    animation: fadeUp 0.8s ease-out both;
}

.value-prop:nth-child(1) {
    animation-delay: 0.1s;
}

.value-prop:nth-child(2) {
    animation-delay: 0.2s;
}

.value-prop:nth-child(3) {
    animation-delay: 0.3s;
}

.value-prop__icon {
    width: 3rem;
    height: 3rem;
    margin-bottom: 1.5rem;
    color: var(--color-emerald);
}

.value-prop__title {
    font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-gray-dark);
}

.value-prop__desc {
    color: var(--color-gray-medium);
    line-height: 1.6;
}

/* Stats Bar */
.stats {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--color-emerald), var(--color-indigo));
    color: var(--color-white);
}

.stats__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    text-align: center;
}

.stat {
    animation: fadeUp 0.8s ease-out both;
}

.stat:nth-child(1) {
    animation-delay: 0.1s;
}

.stat:nth-child(2) {
    animation-delay: 0.2s;
}

.stat:nth-child(3) {
    animation-delay: 0.3s;
}

.stat__number {
    font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
    font-size: 3.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
}

@supports (animation-timeline: view()) {
    .stat__number {
        animation: countUp linear;
        animation-timeline: view();
        animation-range: entry 0% entry 60%;
    }
}

.stat__label {
    font-size: 1.125rem;
    opacity: 0.9;
}

@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Feature Carousel */
.features {
    padding: 6rem 0;
}

.features__header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeUp 0.8s ease-out;
}

.features__title {
    font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-gray-dark);
}

.features__desc {
    color: var(--color-gray-medium);
    font-size: 1.125rem;
}

.features__carousel {
    display: flex;
    gap: 2rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-padding: 1.5rem;
    padding: 1.5rem;
    -webkit-overflow-scrolling: touch;
}

.features__carousel::-webkit-scrollbar {
    height: 8px;
}

.features__carousel::-webkit-scrollbar-track {
    background: var(--color-gray-light);
    border-radius: 4px;
}

.features__carousel::-webkit-scrollbar-thumb {
    background: var(--color-emerald);
    border-radius: 4px;
}

.feature-card {
    flex: 0 0 calc(33.333% - 1.34rem);
    min-width: 280px;
    background: var(--color-white);
    padding: 2rem;
    border-radius: 24px;
    box-shadow: var(--shadow-soft);
    scroll-snap-align: start;
    animation: fadeUp 0.8s ease-out both;
}

.feature-card:nth-child(1) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(2) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.3s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.4s;
}

.feature-card:nth-child(5) {
    animation-delay: 0.5s;
}

.feature-card__title {
    font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-gray-dark);
}

.feature-card__desc {
    color: var(--color-gray-medium);
    line-height: 1.6;
}

/* Footer */
.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--color-gray-light);
    background: var(--color-white);
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer__copyright {
    color: var(--color-gray-medium);
    font-size: 0.875rem;
}

.footer__links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.footer__link {
    text-decoration: none;
    color: var(--color-gray-medium);
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer__link:hover {
    color: var(--color-emerald);
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 1024px) {
    .hero__content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero__graphic {
        order: -1;
    }

    .value-props__grid {
        grid-template-columns: 1fr;
    }

    .stats__grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .feature-card {
        flex: 0 0 calc(50% - 1rem);
    }
}

@media (max-width: 640px) {
    .hero {
        padding: 3rem 0 4rem;
    }

    .hero__title {
        font-size: 2.5rem;
    }

    .hero__subtitle {
        font-size: 1.25rem;
    }

    .nav {
        display: none;
    }

    .value-props,
    .features {
        padding: 3rem 0;
    }

    .feature-card {
        flex: 0 0 calc(100% - 3rem);
    }

    .footer__content {
        flex-direction: column;
        text-align: center;
    }
}