:root {
    --bg-color: #0a0a0a;
    --main-gold: #d4af37;
    --text-white: #ffffff;
    --text-gray: #a0a0a0;
    --card-bg: #111111;
    --content-width: 1000px;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-white);
    font-family: 'Noto Serif JP', 'Playfair Display', serif;
    line-height: 1.8;
}

.inner {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 20px;
}

header {
    width: 100%;
    border-bottom: 1px solid #222;
    background-color: rgba(10, 10, 10, 0.9);
    position: sticky;
    top: 0;
    z-index: 100;
}

header .inner {
    height: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--main-gold);
    letter-spacing: 2px;
    text-transform: uppercase;
    text-decoration: none;
}

.lang-switch {
    font-size: 0.8rem;
    color: var(--text-gray);
}

.lang-switch a {
    color: inherit;
    text-decoration: none;
    margin: 0 5px;
    transition: color 0.3s;
}

.lang-switch a:hover {
    color: var(--main-gold);
}

.hero {
    padding: 160px 0;
    text-align: center;
    background-image: linear-gradient(rgba(10,10,10,0.7), rgba(10,10,10,0.7)), url('../images/header.jpg'); 
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--main-gold);
    margin-bottom: 20px;
    font-weight: 400;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.4rem);
    letter-spacing: 0.4rem;
    font-weight: 300;
}

section {
    width: 100%;
    padding: 100px 0;
}

.section-tag {
    color: var(--main-gold);
    font-family: 'Playfair Display', serif;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 10px;
    text-align: center;
}

h2 {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 40px;
    font-weight: 400;
}

.about {
    background-color: #0f0f0f;
}

.about-content {
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-gray);
    text-align: justify;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background-color: var(--card-bg);
    border: 1px solid #222;
    padding: 50px 30px;
    text-align: center;
    transition: all 0.3s;
}

.product-card:hover {
    border-color: var(--main-gold);
    transform: translateY(-10px);
}

.product-card h3 {
    color: var(--main-gold);
    font-family: 'Playfair Display', serif;
    font-size: 1.6rem;
    margin-bottom: 15px;
}

.btn {
    display: inline-block;
    margin-top: 20px;
    padding: 10px 30px;
    border: 1px solid var(--main-gold);
    color: var(--main-gold);
    text-decoration: none;
    font-size: 0.8rem;
    transition: 0.3s;
}

.btn:hover {
    background-color: var(--main-gold);
    color: #000;
}

footer {
    background-color: #050505;
    padding: 80px 0 40px;
    border-top: 1px solid #222;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 60px;
}

.corp-info h4 {
    color: var(--main-gold);
    margin-bottom: 20px;
}

.risk-warning {
    font-size: 0.75rem;
    color: var(--text-gray);
    border-left: 1px solid var(--main-gold);
    padding-left: 20px;
}

.disclaimer {
    margin-top: 60px;
    padding-top: 20px;
    border-top: 1px solid #1a1a1a;
    text-align: center;
    font-size: 0.7rem;
    color: var(--text-gray);
}