:root {
    --primary-color: #0F4C81;
    /* Classic Blue */
    --primary-dark: #092e4b;
    --accent-color: #F5A623;
    /* Professional Orange/Gold */
    --accent-hover: #d48e1b;
    --text-main: #333333;
    --text-light: #666666;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --bg-dark: #1a1a2e;
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px rgba(0, 0, 0, 0.1);
    --radius-md: 8px;
    --radius-lg: 16px;
    --font-heading: 'Noto Sans JP', sans-serif;
    --font-body: 'Inter', 'Noto Sans JP', sans-serif;
}

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

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

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

ul {
    list-style: none;
}

/* Utilities */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-white {
    color: var(--bg-white) !important;
}

.bg-light {
    background-color: var(--bg-light);
}

.bg-dark {
    background-color: var(--bg-dark);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(15, 76, 129, 0.3);
}

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

.btn-accent:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(245, 166, 35, 0.4);
}

.btn-outline {
    border: 2px solid white;
    color: white;
}

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

.btn-sm {
    padding: 8px 20px;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1.1rem;
}

.btn-xl {
    padding: 20px 50px;
    font-size: 1.3rem;
}

/* Header */
.header {
    position: fixed;
    top: 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);
    height: 70px;
    display: flex;
    align-items: center;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

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

.nav a:not(.btn) {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
}

.nav a:not(.btn):hover {
    color: var(--primary-color);
}

/* Hero */
.hero {
    position: relative;
    height: 90vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('https://images.unsplash.com/photo-1519389950473-47ba0277781c?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
    color: white;
    text-align: center;
    margin-top: 0;
    /* Header is fixed, but we might usually add padding-top. Here using vh. */
}

/* Overlay gradient */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(15, 76, 129, 0.9), rgba(15, 76, 129, 0.6));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.9rem;
    margin-bottom: 20px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-text {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
}

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

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    margin: 10px auto 0;
    border-radius: 2px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* Grid System */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

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

/* Cards */
.card {
    background: white;
    padding: 40px 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 4px solid transparent;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
    border-top-color: var(--primary-color);
}

.icon-box {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin-bottom: 20px;
}

.icon-box.warning {
    background: #fff3db;
    color: #f59e0b;
}

.icon-box.accent {
    background: rgba(245, 166, 35, 0.2);
    color: var(--accent-color);
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.card p {
    font-size: 0.95rem;
    color: var(--text-light);
}

.dark-card {
    background: rgba(255, 255, 255, 0.05);
    /* Glassy tech look */
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
}

.dark-card p {
    color: rgba(255, 255, 255, 0.7);
}

.dark-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-color);
}

/* Feature Row */
.feature-row {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 80px;
}

.feature-row.reverse {
    flex-direction: row-reverse;
}

.feature-text {
    flex: 1;
}

.feature-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.feature-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.feature-visual {
    flex: 1;
    height: 350px;
    background: #e0e7ff;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
    /* Placeholder for actual image */
    background: linear-gradient(135deg, #f0f4f8, #d9e2ec);
}

/* Case Studies */
.case-card {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.case-img {
    height: 200px;
    background-color: #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    background: #4a5568;
}

.case-body {
    padding: 25px;
}

.case-body h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.case-body p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Flow */
.flow-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
}

.flow-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: #e2e8f0;
    z-index: 0;
}

.step {
    position: relative;
    z-index: 1;
    background: var(--bg-light);
    /* To hide line behind text if needed, or simple stacking */
    width: 23%;
    text-align: center;
    padding: 0 10px;
}

.step-num {
    width: 80px;
    height: 80px;
    background: white;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0 auto 20px;
    box-shadow: var(--shadow-sm);
}

.step h4 {
    margin-bottom: 10px;
    font-weight: 700;
}

.step p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-bottom: 1px solid #eee;
    padding: 20px;
}

.faq-q {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.faq-q::before {
    content: 'Q.';
    margin-right: 10px;
    color: var(--accent-color);
}

.faq-a {
    padding-left: 28px;
    color: var(--text-light);
}

/* CTA Footer */
.cta-section {
    background: var(--primary-color);
    color: white;
    text-align: center;
    padding: 100px 20px;
}

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

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* Footer */
.footer {
    background: #111;
    color: #888;
    text-align: center;
    padding: 30px 0;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 900px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .grid-3,
    .grid-2 {
        grid-template-columns: 1fr;
    }

    .feature-row {
        flex-direction: column !important;
        gap: 30px;
        text-align: center;
    }

    .feature-visual {
        width: 100%;
    }

    .flow-steps {
        flex-direction: column;
        gap: 40px;
    }

    .flow-steps::before {
        width: 2px;
        height: 100%;
        left: 50%;
        top: 0;
        transform: translateX(-50%);
    }

    .step {
        width: 100%;
    }

    .nav {
        display: none;
    }

    /* Simplified for this exercise */
}