/* リセット */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 変数 */
:root {
    --primary-color: #0066FF;
    --primary-dark: #0052CC;
    --secondary-color: #00D4FF;
    --text-dark: #1A1A1A;
    --text-gray: #666666;
    --text-light: #999999;
    --bg-light: #F8FAFB;
    --white: #FFFFFF;
    --border-color: #E0E6ED;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 基本スタイル */
body {
    font-family: 'Noto Sans JP', 'Noto Sans KR', sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
}

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

/* ヘッダー */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.cta-button {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: 8px;
    transition: background 0.3s;
}

.cta-button:hover {
    background: var(--primary-dark);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: 0.3s;
}

/* ヒーローセクション */
.hero {
    background: linear-gradient(135deg, #0066FF 0%, #00D4FF 100%);
    color: var(--white);
    padding: 100px 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.subtitle {
    display: block;
    font-size: 1.2rem;
    font-weight: 400;
    margin-top: 10px;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

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

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

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

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

.hero-badges {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
}

/* ビジュアル部分 */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.question-bubble,
.answer-bubble {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.question-bubble {
    background: rgba(255, 255, 255, 0.2);
    animation: pulse 2s infinite;
}

.answer-bubble {
    background: var(--white);
    color: var(--primary-color);
    animation: pulse 2s infinite 1s;
}

.arrow {
    font-size: 2rem;
    animation: slide 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

@keyframes slide {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(10px); }
}

/* セクション共通 */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 50px;
}

/* 課題セクション */
.problems {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.problem-card {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.problem-card:hover {
    transform: translateY(-5px);
}

.problem-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.problem-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.problem-card p {
    color: var(--text-gray);
}

/* ソリューションセクション */
.solution {
    padding: 80px 0;
}

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

.solution-card {
    padding: 30px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s;
}

.solution-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.solution-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.solution-icon i {
    font-size: 1.8rem;
    color: var(--white);
}

.solution-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.solution-card p {
    color: var(--text-gray);
    line-height: 1.7;
}

/* プランセクション */
.plans {
    padding: 80px 0;
    background: var(--bg-light);
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.plan-card {
    background: var(--white);
    border-radius: 12px;
    padding: 40px 30px;
    box-shadow: var(--shadow);
    position: relative;
    transition: transform 0.3s;
}

.plan-card:hover {
    transform: translateY(-5px);
}

.plan-card.featured {
    border: 3px solid var(--primary-color);
}

.badge-popular {
    position: absolute;
    top: -15px;
    right: 30px;
    background: var(--primary-color);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.plan-header h3 {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.plan-target {
    color: var(--text-gray);
    margin-bottom: 20px;
}

.plan-price {
    display: flex;
    align-items: baseline;
    margin-bottom: 10px;
}

.currency {
    font-size: 1.5rem;
    font-weight: 600;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.period {
    font-size: 1.2rem;
    color: var(--text-gray);
}

.plan-note {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: 30px;
}

.plan-features {
    list-style: none;
    margin-bottom: 30px;
}

.plan-features li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.plan-features i {
    color: var(--primary-color);
    margin-right: 10px;
}

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

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

.plan-cta {
    text-align: center;
}

.btn-link {
    background: none;
    color: var(--primary-color);
    padding: 10px 0;
}

.btn-link:hover {
    text-decoration: underline;
}

/* 特徴セクション */
.features {
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature-item {
    position: relative;
    padding-left: 80px;
}

.feature-number {
    position: absolute;
    left: 0;
    top: 0;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.feature-item h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.feature-item p {
    color: var(--text-gray);
    line-height: 1.7;
}

/* CTAセクション */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 80px 0;
}

.cta-content {
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* フッター */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.footer-logo i {
    font-size: 1.8rem;
}

.footer-tagline {
    color: var(--text-light);
    margin-top: 5px;
}

.footer-col h4 {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-col a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}

/* レスポンシブ */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-visual {
        display: none;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-badges {
        flex-direction: column;
    }

    .section-title {
        font-size: 2rem;
    }

    .cta-content h2 {
        font-size: 1.8rem;
    }

    .cta-buttons {
        flex-direction: column;
    }
}