:root {
    --primary-color: #2c5f55;
    /* Deep Green */
    --accent-color: #a4cebb;
    /* Sage Green */
    --bg-color: #f7f9f8;
    /* Off-white/Rice paper */
    --text-color: #333;
    --card-bg: #fff;
    --transition-speed: 0.3s;
    --gradient-hero: linear-gradient(135deg, #e3f2fd 0%, #e8f5e9 100%);
}

body {
    margin: 0;
    font-family: 'Noto Serif SC', serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3 {
    font-family: 'ZCOOL XiaoWei', serif;
    font-weight: normal;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

/* Hero & Header */
.header {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    box-sizing: border-box;
    background: rgba(255, 255, 255, 0.7);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
}

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

.nav-links a {
    font-size: 1.1rem;
    color: var(--primary-color);
    position: relative;
    font-weight: 500;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-speed);
}

.nav-links a:hover::after {
    width: 100%;
}

.hero {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 5%;
    padding-top: 100px;
    position: relative;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    z-index: 2;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
    letter-spacing: 2px;
}

.hero h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #555;
    font-weight: 300;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    color: #666;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-size: 1.1rem;
    transition: all var(--transition-speed);
    cursor: pointer;
    font-weight: 500;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(44, 95, 85, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(44, 95, 85, 0.4);
    background-color: #234d44;
}

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

.btn-secondary:hover {
    background-color: rgba(44, 95, 85, 0.05);
    transform: translateY(-2px);
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    height: 600px;
}

.zen-circle {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle at 30% 30%, #ecfdf5, #a7f3d0);
    border-radius: 50%;
    filter: blur(50px);
    animation: float 8s ease-in-out infinite;
    opacity: 0.7;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 0;
}

.phone-mockup {
    z-index: 1;
    width: 280px;
    border-radius: 40px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    border: 8px solid #fff;
    background: #000;
    overflow: hidden;
    transform: rotate(-5deg);
    transition: transform 0.5s ease;
}

.phone-mockup:hover {
    transform: rotate(0deg) scale(1.02);
}

.phone-mockup img {
    width: 100%;
    display: block;
    height: auto;
}

/* Features Section */
.features {
    padding: 8rem 5%;
    background: #fff;
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    margin-bottom: 6rem;
}

.section-title h2 {
    font-size: 2.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-title p {
    font-size: 1.3rem;
    color: #888;
    font-style: italic;
    font-family: 'ZCOOL XiaoWei', serif;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 6rem;
    margin-bottom: 8rem;
}

.feature-item.reverse {
    flex-direction: row-reverse;
}

.feature-text {
    flex: 1;
}

.feature-text .icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    padding: 1rem;
    background: #e0f2f1;
    border-radius: 20px;
    color: var(--primary-color);
}

.feature-text h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.feature-text p {
    font-size: 1.1rem;
    color: #555;
    line-height: 1.8;
}

.feature-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
}

.feature-visual img {
    width: 280px;
    border-radius: 30px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-speed);
    border: 6px solid #f0f0f0;
}

.feature-visual img:hover {
    transform: translateY(-10px);
}

/* About Section */
.about {
    padding: 6rem 3rem;
    background-color: var(--bg-color);
    text-align: center;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.about p {
    font-size: 1.2rem;
    color: #555;
}

/* Footer */
footer {
    background-color: #2c3e50;
    /* Darker footer */
    color: #fff;
    padding: 4rem 3rem 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
    margin-bottom: 3rem;
}

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #a4cebb;
}

.footer-section p {
    margin-bottom: 0.5rem;
    color: #ccc;
    font-size: 0.9rem;
}

.footer-section.links a {
    display: block;
    margin-bottom: 0.5rem;
    color: #ccc;
    transition: color 0.2s;
}

.footer-section.links a:hover {
    color: #fff;
    text-decoration: none;
    padding-left: 5px;
}

.copyright {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    color: #777;
    font-size: 0.8rem;
}

/* Animations */
@keyframes float {
    0% {
        transform: translate(-50%, -50%) scale(1);
    }

    50% {
        transform: translate(-50%, -50%) scale(1.05);
    }

    100% {
        transform: translate(-50%, -50%) scale(1);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        flex-direction: column-reverse;
        /* Text on top for mobile too? No, usually image on top or text on top. Let's keep text on top on mobile, but here column-reverse puts visual on top? No, main axis is column. Flex-start is top. */
        padding-top: 120px;
        text-align: center;
        gap: 3rem;
        height: auto;
    }

    .hero-content {
        margin-top: 0;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        width: 100%;
        height: auto;
    }

    .zen-circle {
        width: 300px;
        height: 300px;
    }

    .phone-mockup {
        width: 220px;
    }

    .feature-item,
    .feature-item.reverse {
        flex-direction: column;
        gap: 3rem;
        text-align: center;
    }

    .feature-visual img {
        width: 100%;
        max-width: 300px;
    }

    .navbar {
        padding: 1rem;
        justify-content: center;
        flex-wrap: wrap;
    }

    .logo {
        width: 100%;
        text-align: center;
        margin-bottom: 1rem;
    }

    .nav-links {
        gap: 1.5rem;
        font-size: 0.9rem;
    }
}