@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&display=swap');

body {
    font-family: 'Noto Sans JP', sans-serif;
    scroll-behavior: smooth;
}

.hero-section {
    min-height: 600px;
    background-image: url('../images/business_bridge.jpg');
    background-size: cover;
    background-position: center;
    position: relative;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.4) 100%);
}

.sticky-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    transition: all 0.3s ease;
    z-index: 100;
}

.scrolled {
    background-color: white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.scrolled .nav-link {
    color: #1a202c;
}

.nav-link {
    color: white;
    font-weight: 500;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: #F39C12;
    transition: width 0.3s ease;
}

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

.btn-primary {
    background: #F39C12;
    color: white;
    transition: all 0.3s ease;
    transform: translateY(0);
}

.btn-primary:hover {
    background: #E67E22;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px rgba(243, 156, 18, 0.2);
}

.feature-card {
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid #eee;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    border-color: #F39C12;
}

.client-logo {
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all 0.3s ease;
}

.client-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
}

.contact-form input:focus, .contact-form textarea:focus {
    border-color: #F39C12;
    box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.2);
}

.section-heading {
    position: relative;
    display: inline-block;
    margin-bottom: 2rem;
}

.section-heading::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 3px;
    background-color: #F39C12;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

/* アニメーション */
.fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }

/* モバイルメニュー */
.mobile-menu {
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
}

.mobile-menu.active {
    transform: translateX(0);
}

/* レスポンシブ対応のスタイル追加 */
@media (max-width: 768px) {
    .hero-section {
        min-height: auto;
        padding: 6rem 0;
    }

    .section-heading::after {
        width: 40px;
    }

    .feature-card {
        margin-bottom: 1.5rem;
    }
}

/* カードのレスポンシブ対応 */
@media (max-width: 640px) {
    .feature-card {
        padding: 1.5rem;
    }

    .w-20 {
        width: 3.5rem;
    }

    .h-20 {
        height: 3.5rem;
    }

    .w-10 {
        width: 1.75rem;
    }

    .h-10 {
        height: 1.75rem;
    }
}

/* テキストのレスポンシブ対応 */
@media (max-width: 768px) {
    .text-4xl {
        font-size: 1.875rem;
        line-height: 2.25rem;
    }

    .text-3xl {
        font-size: 1.5rem;
        line-height: 2rem;
    }

    .text-2xl {
        font-size: 1.25rem;
        line-height: 1.75rem;
    }

    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* ナビゲーションのレスポンシブ対応 */
@media (max-width: 768px) {
    .nav-link {
        font-size: 1rem;
    }

    .sticky-nav {
        padding: 0.75rem 1rem;
    }
}

/* コンテナーの最大幅設定 */
.container {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 640px) {
    .container {
        max-width: 640px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 768px;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 1024px;
    }
}

@media (min-width: 1280px) {
    .container {
        max-width: 1280px;
    }
}