:root {
    --primary-color: #000000;
    --accent-color: #FE2C55; /* TikTok Red-ish */
    --accent-color-2: #25F4EE; /* TikTok Cyan-ish */
    --text-color: #333333;
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --font-main: 'Noto Sans JP', sans-serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-white);
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

ul {
    list-style: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--primary-color);
}

.nav-list {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-list a {
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-list a:hover {
    color: var(--accent-color);
}

.btn-contact {
    background: var(--primary-color);
    color: white !important;
    padding: 10px 24px;
    border-radius: 50px;
}

.btn-contact:hover {
    background: var(--accent-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
}

/* Hero */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at center, var(--accent-color-2) 0%, transparent 70%);
    opacity: 0.1;
    filter: blur(60px);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: #666;
}

.btn-primary {
    display: inline-block;
    padding: 15px 40px;
    background: var(--primary-color);
    color: white;
    font-weight: 700;
    border-radius: 50px;
    letter-spacing: 1px;
}

.btn-primary:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

/* Section Common */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    text-align: center;
    letter-spacing: 2px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--accent-color);
}

.section-desc {
    text-align: center;
    max-width: 600px;
    margin: -40px auto 60px;
    color: #666;
}

/* About */
.about {
    background: var(--bg-white);
}

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

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.about-text p {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

/* Strengths */
.strengths {
    background: var(--bg-light);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: 0.3s;
}

.card:hover {
    transform: translateY(-10px);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

/* Services */
.services {
    background: var(--bg-white);
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.service-item {
    display: flex;
    align-items: center;
    padding: 40px;
    border: 1px solid #eee;
    border-radius: 20px;
    transition: 0.3s;
}

.service-item:hover {
    border-color: var(--accent-color);
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.service-content h3 {
    font-size: 1.6rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* Partners */
.partners {
    background: var(--bg-light);
}

.partners-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
}

.partner-logo {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 200px;
    height: 120px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    font-weight: 700;
    text-align: center;
    padding: 20px;
}

.partner-sub {
    font-size: 0.8rem;
    font-weight: 400;
    color: #888;
    margin-top: 5px;
}

/* Team */
.team {
    background: var(--bg-white);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.team-member {
    text-align: center;
    padding: 40px;
    background: var(--bg-light);
    border-radius: 20px;
}

.team-member h3 {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.role {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 15px;
}

/* Footer */
.footer {
    background: #111;
    color: white;
    padding: 80px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-logo {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    display: block;
    margin-bottom: 20px;
}

.footer-info p {
    color: #999;
}

.footer-links h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.footer-links p {
    color: #999;
    margin-bottom: 10px;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid #333;
    padding-top: 20px;
    color: #555;
    font-size: 0.9rem;
}

/* Mobile */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav {
        display: none; /* Simplification for prototype */
    }

    .mobile-menu-btn {
        display: flex;
    }
    
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
}