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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: #1a1a1a;
    line-height: 1.6;
    background: #fff;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Nav */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid #eee;
    z-index: 100;
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo img {
    height: 56px;
    width: auto;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: #666;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #1a1a1a;
}

/* Nav dropdown */
.nav-links .nav-dropdown {
    position: relative;
}

.nav-links .nav-dropdown > a {
    cursor: pointer;
}

.nav-links .nav-dropdown > a::after {
    content: '';
    display: inline-block;
    width: 5px;
    height: 5px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
    margin-left: 5px;
    margin-bottom: 2px;
    transition: transform 0.2s;
}

.nav-links .nav-dropdown:hover > a::after {
    transform: rotate(-135deg);
}

.nav-links .dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: -12px;
    padding-top: 12px;
    min-width: 260px;
    z-index: 200;
}

.nav-links .dropdown-menu-inner {
    background: #fff;
    border: 1px solid #eee;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    padding: 8px 0;
}

.nav-links .nav-dropdown:hover > .dropdown-menu {
    display: block;
}

.nav-links .dropdown-menu a {
    display: block;
    padding: 10px 20px;
    font-size: 0.88rem;
    color: #666;
    text-decoration: none;
    font-weight: 500;
    white-space: normal;
    transition: background 0.15s, color 0.15s;
}

.nav-links .dropdown-menu a:hover {
    background: #f5f5f5;
    color: #1a1a1a;
}

.nav-links .dropdown-menu .dropdown-desc {
    display: block;
    font-size: 0.75rem;
    color: #999;
    font-weight: 400;
    margin-top: 2px;
    line-height: 1.4;
}

/* Hero */
.hero {
    padding: 180px 0 120px;
}

.hero-grid {
    display: flex;
    align-items: center;
    gap: 48px;
}

.hero-text {
    flex: 1;
}

.hero-image {
    flex: 0 0 340px;
    max-width: 340px;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
}

.hero h1 {
    font-size: 3.25rem;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero-sub {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 40px;
    max-width: 480px;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    background: #1a1a1a;
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: background 0.2s;
}

.btn:hover {
    background: #333;
}

/* About */
.about {
    padding: 100px 0;
    border-top: 1px solid #eee;
}

.about h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 32px;
    letter-spacing: -0.02em;
}

.about-content p {
    color: #444;
    font-size: 1.05rem;
    margin-bottom: 16px;
    max-width: 600px;
}

/* Contact */
.contact {
    padding: 100px 0;
    border-top: 1px solid #eee;
}

.contact h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.contact p {
    color: #666;
    font-size: 1.05rem;
    margin-bottom: 24px;
}

.contact-email {
    font-size: 1.2rem;
    color: #1a1a1a;
    text-decoration: none;
    font-weight: 600;
    border-bottom: 2px solid #1a1a1a;
    padding-bottom: 2px;
    transition: opacity 0.2s;
}

.contact-email:hover {
    opacity: 0.6;
}

/* Footer */
.footer {
    padding: 40px 0;
    border-top: 1px solid #eee;
}

.footer p {
    font-size: 0.85rem;
    color: #999;
}

/* Responsive */
@media (max-width: 640px) {
    .hero {
        padding: 140px 0 80px;
    }

    .hero-grid {
        flex-direction: column;
        gap: 40px;
    }

    .hero-image img {
        max-width: 280px;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero-sub {
        font-size: 1.05rem;
    }

    .about,
    .contact {
        padding: 64px 0;
    }
}