/* ============================================
   STOCK ASSIST - Landing Page Styles
   Inspired by elegant, corporate design
   ============================================ */

/* ============================================
   Reset & Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: #333;
    line-height: 1.8;
    background-color: #fff;
    overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Serif JP', serif;
    font-weight: 600;
    line-height: 1.4;
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
}

/* ============================================
   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 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

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

.logo-name {
    font-size: 24px;
    color: #1a4d8f;
    font-weight: 700;
    letter-spacing: 1px;
}

.logo-subtitle {
    font-size: 10px;
    color: #666;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav {
    display: flex;
    gap: 35px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #1a4d8f;
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: #1a4d8f;
}

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

.cta-button-header {
    padding: 10px 25px;
    background: #1a4d8f;
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.cta-button-header:hover {
    background: #153d73;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(26, 77, 143, 0.3);
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a4d8f 0%, #2d6ba8 50%, #4a88c7 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="1" height="1" fill="%23ffffff" opacity="0.05"/></svg>');
    background-size: 50px 50px;
    animation: patternMove 20s linear infinite;
}

@keyframes patternMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: 0 40px;
}

.hero-text {
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: 3vw;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 3px;
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 300;
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.hero-description {
    font-size: 16px;
    line-height: 2;
    margin-bottom: 24px;
    opacity: 0.9;
}

.hero-note {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 28px;
    color: rgba(255, 255, 255, 0.88);
}

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

.button {
    padding: 18px 45px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: all 0.3s ease;
    display: inline-block;
}

.button-primary {
    background: #fff;
    color: #1a4d8f;
}

.button-primary:hover {
    background: #f0f0f0;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.button-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.button-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

.button-large {
    padding: 20px 50px;
    font-size: 18px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #fff;
    font-size: 12px;
    letter-spacing: 2px;
    animation: fadeIn 2s ease;
}

.scroll-line {
    width: 1px;
    height: 50px;
    background: #fff;
    margin-top: 10px;
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { height: 50px; }
    50% { height: 30px; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-description {
        font-size: 14px;
    }

    .hero-note {
        font-size: 13px;
        margin-bottom: 24px;
    }
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-label {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    color: #1a4d8f;
    font-weight: 600;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.section-title {
    font-size: 42px;
    color: #333;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.section-subtitle {
    font-size: 18px;
    color: #666;
    font-weight: 300;
}

@media (max-width: 768px) {
    .section-title {
        font-size: 32px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
}

/* ============================================
   Problems Section
   ============================================ */
.features {
    padding: 120px 0;
    background: linear-gradient(to bottom, #f8f9fb 0%, #fff 100%);
}

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

.feature-card {
    background: #fff;
    padding: 50px 35px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 30px;
    background: linear-gradient(135deg, #e8f0f8 0%, #d4e4f3 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: #1a4d8f;
}

.feature-title {
    font-size: 22px;
    color: #333;
    margin-bottom: 20px;
    line-height: 1.6;
}

.feature-description {
    font-size: 15px;
    color: #666;
    line-height: 1.9;
}

/* ============================================
   Value Section
   ============================================ */
.strengths {
    padding: 120px 0;
}

.strength-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    margin-bottom: 120px;
    padding: 0 40px;
}

.strength-item:last-child {
    margin-bottom: 0;
}

.strength-item.reverse {
    direction: rtl;
}

.strength-item.reverse > * {
    direction: ltr;
}

.strength-image-placeholder {
    width: 100%;
    height: 450px;
    background: linear-gradient(135deg, #e8f0f8 0%, #d4e4f3 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: #1a4d8f;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

/* Image styles for value section */
.strength-image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.strength-image img:hover {
    transform: scale(1.02);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.12);
}

.strength-label {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 2px;
    color: #1a4d8f;
    font-weight: 600;
    margin-bottom: 15px;
}

.strength-title {
    font-size: 38px;
    color: #333;
    margin-bottom: 25px;
    letter-spacing: 1px;
}

.strength-description {
    font-size: 16px;
    color: #666;
    line-height: 2;
    margin-bottom: 30px;
}

.strength-list {
    list-style: none;
}

.strength-list li {
    font-size: 15px;
    color: #555;
    padding: 12px 0;
    display: flex;
    align-items: center;
}

.strength-list li i {
    color: #1a4d8f;
    margin-right: 15px;
    font-size: 18px;
}

@media (max-width: 768px) {
    .strength-item {
        grid-template-columns: 1fr;
        gap: 40px;
        margin-bottom: 80px;
        padding: 0 20px;
    }
    
    .strength-item.reverse {
        direction: ltr;
    }
    
    .strength-image-placeholder {
        height: 300px;
    }
    
    .strength-image img {
        height: 300px;
    }
    
    .strength-title {
        font-size: 28px;
    }
}

/* ============================================
   How It Works Section
   ============================================ */
.flow {
    padding: 120px 0;
    background: linear-gradient(to bottom, #f8f9fb 0%, #fff 100%);
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 280px;
    background: #fff;
    padding: 50px 35px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    position: relative;
    transition: all 0.4s ease;
}

.step:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #1a4d8f 0%, #2d6ba8 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    box-shadow: 0 5px 20px rgba(26, 77, 143, 0.3);
}

.step-icon {
    width: 100px;
    height: 100px;
    margin: 30px auto 30px;
    background: linear-gradient(135deg, #e8f0f8 0%, #d4e4f3 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: #1a4d8f;
}

.step-title {
    font-size: 24px;
    color: #333;
    margin-bottom: 20px;
}

.step-description {
    font-size: 15px;
    color: #666;
    line-height: 1.9;
}

.step-arrow {
    font-size: 30px;
    color: #1a4d8f;
    opacity: 0.3;
}

@media (max-width: 1024px) {
    .steps {
        flex-direction: column;
        align-items: stretch;
        gap: 18px;
    }

    .step {
        min-width: 100%;
    }

    .step-arrow {
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 22px;
        line-height: 1;
        opacity: 0.5;
    }

    .step-arrow i {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    .step-arrow {
        display: none;
    }
    
    .step {
        min-width: 100%;
    }
}

/* Integration Visual */
.integration-visual {
    max-width: 800px;
    margin: 80px auto 0;
    text-align: center;
}

.integration-image {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.12);
    transition: transform 0.4s ease;
}

.integration-image:hover {
    transform: scale(1.03);
}

.integration-text {
    margin-top: 30px;
}

.integration-text p {
    font-size: 18px;
    color: #666;
    font-weight: 500;
    line-height: 1.8;
}

@media (max-width: 768px) {
    .integration-visual {
        margin-top: 60px;
    }
    
    .integration-image {
        border-radius: 10px;
    }
    
    .integration-text p {
        font-size: 16px;
    }
}

/* ============================================
   Governance Section
   ============================================ */
.governance {
    padding: 120px 0;
}

.governance-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 35px;
}

@media (max-width: 1200px) {
    .governance-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .governance-grid {
        grid-template-columns: 1fr;
    }
}

.governance-card {
    background: #fff;
    padding: 45px 35px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
    border-top: 4px solid #1a4d8f;
}

.governance-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.governance-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #e8f0f8 0%, #d4e4f3 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #1a4d8f;
    margin-bottom: 25px;
}

.governance-title {
    font-size: 22px;
    color: #333;
    margin-bottom: 14px;
    font-weight: 600;
}

.governance-description {
    font-size: 15px;
    color: #666;
    line-height: 1.9;
    margin-bottom: 16px;
}

.governance-points {
    list-style: none;
}

.governance-points li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: #4f5d6b;
    margin-bottom: 10px;
    line-height: 1.7;
}

.governance-points li i {
    color: #1a4d8f;
    margin-top: 3px;
}

/* ============================================
   Investment Section
   ============================================ */
.benefits {
    padding: 120px 0;
    background: linear-gradient(to bottom, #f8f9fb 0%, #fff 100%);
}

.dashboard-preview {
    max-width: 1000px;
    margin: 0 auto 80px;
    text-align: center;
}

.dashboard-image {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.15);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.dashboard-image:hover {
    transform: translateY(-10px);
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.2);
}

.benefits-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.benefits-label {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    color: #1a4d8f;
    font-weight: 600;
    margin-bottom: 15px;
}

.benefits-title {
    font-size: 42px;
    color: #333;
    margin-bottom: 40px;
    letter-spacing: 1px;
}

.benefits-description {
    font-size: 18px;
    color: #666;
    line-height: 2;
    margin-bottom: 60px;
}

.benefits-points {
    text-align: left;
    margin-bottom: 60px;
}

.benefits-point {
    display: flex;
    gap: 25px;
    margin-bottom: 40px;
    padding: 30px;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.benefits-point:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.benefits-point i {
    font-size: 32px;
    color: #1a4d8f;
    flex-shrink: 0;
}

.benefits-point h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 10px;
}

.benefits-point p {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

.benefits-note {
    padding: 35px;
    background: #fff;
    border-radius: 15px;
    border-left: 4px solid #1a4d8f;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.benefits-note p {
    font-size: 15px;
    color: #666;
    line-height: 2;
}

@media (max-width: 768px) {
    .benefits-title {
        font-size: 32px;
    }
    
    .benefits-description {
        font-size: 16px;
    }
    
    .benefits-point {
        flex-direction: column;
        gap: 15px;
    }
    
    .dashboard-preview {
        margin-bottom: 60px;
    }
    
    .dashboard-image {
        border-radius: 10px;
    }
}

/* ============================================
   Final CTA Section
   ============================================ */
.final-cta {
    position: relative;
    padding: 150px 0;
    background: linear-gradient(135deg, #1a4d8f 0%, #2d6ba8 50%, #4a88c7 100%);
    text-align: center;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="1" height="1" fill="%23ffffff" opacity="0.03"/></svg>');
    background-size: 50px 50px;
}

.final-cta-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.1);
}

.final-cta-content {
    position: relative;
    z-index: 2;
    color: #fff;
}

.final-cta-title {
    font-size: 52px;
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.final-cta-subtitle {
    font-size: 20px;
    margin-bottom: 50px;
    line-height: 2;
    opacity: 0.95;
}

.final-cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.final-cta-contact {
    padding-top: 50px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    display: inline-block;
}

.final-cta-contact p {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 10px;
}

.phone-number {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 5px !important;
}

.business-hours {
    font-size: 14px;
    opacity: 0.7;
}

@media (max-width: 768px) {
    .final-cta {
        padding: 100px 20px;
    }
    
    .final-cta-title {
        font-size: 36px;
    }
    
    .final-cta-subtitle {
        font-size: 16px;
    }
    
    .phone-number {
        font-size: 24px;
    }
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: #1a2332;
    color: #fff;
    padding: 64px 0 28px;
}

.footer-content {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(220px, 0.85fr);
    gap: 36px;
    align-items: start;
    max-width: 900px;
    margin: 0 auto 32px;
}

.footer-brand h3 {
    font-size: 28px;
    margin-bottom: 10px;
    color: #fff;
}

.footer-tagline {
    font-size: 11px;
    letter-spacing: 2px;
    color: #8899aa;
    margin-bottom: 20px;
    display: block;
    text-transform: uppercase;
}

.footer-description {
    font-size: 14px;
    color: #8899aa;
    line-height: 1.9;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    width: 100%;
    max-width: 240px;
    justify-self: end;
}

.footer-column h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: #fff;
    font-weight: 600;
}

.footer-link-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.footer-column-content .footer-link-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 24px;
}

.footer-link-list li {
    margin-bottom: 0;
}

.footer-link-list li a {
    color: #8899aa;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-link-list li a:hover {
    color: #fff;
}

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

.footer-bottom p {
    font-size: 13px;
    color: #8899aa;
}

@media (max-width: 768px) {
    .footer {
        padding: 52px 0 24px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 22px;
        max-width: 100%;
        margin-bottom: 24px;
        text-align: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 0;
        max-width: 100%;
        justify-self: center;
    }

    .footer-column h4 {
        margin-bottom: 14px;
    }

    .footer-column-content .footer-link-list {
        grid-template-columns: repeat(2, minmax(0, auto));
        column-gap: 18px;
        justify-content: center;
    }

    .footer-link-list {
        gap: 8px;
        justify-items: center;
    }
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s ease;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s ease;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================
   Utility Classes
   ============================================ */
.pc-only {
    display: inline;
}

.sp-only {
    display: none;
}

@media (max-width: 768px) {
    .pc-only {
        display: none;
    }
    
    .sp-only {
        display: inline;
    }
}

/* ============================================
   Challenges Section
   ============================================ */
.challenges {
    padding: 108px 0 88px;
    background: #fff;
}

.challenges .section-header {
    margin-bottom: 56px;
}

.challenges .section-label {
    margin-bottom: 12px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(26, 77, 143, 0.08);
    letter-spacing: 2.2px;
}

.challenges .section-title {
    margin-bottom: 14px;
    line-height: 1.35;
}

.challenges .section-subtitle {
    max-width: 760px;
    margin: 0 auto;
    font-size: 17px;
    line-height: 1.85;
    color: #4f5f70;
}

.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 22px;
    margin-bottom: 34px;
}

.challenge-card {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 24px 22px;
    border: 1px solid #d7e3f0;
    border-radius: 14px;
    background: #f8fbff;
    box-shadow: 0 10px 28px rgba(18, 57, 101, 0.09);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.challenge-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 34px rgba(18, 57, 101, 0.14);
    border-color: #c2d7ee;
}

.challenge-card i {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #1a4d8f;
    font-size: 16px;
    margin-top: 1px;
    background: linear-gradient(135deg, #eef4fb 0%, #dce9f8 100%);
}

.challenge-card p {
    font-size: 15px;
    line-height: 1.85;
    color: #3e4f62;
}

.challenges-bridge {
    width: min(860px, 100%);
    margin: 0 auto;
    text-align: left;
    font-size: 15px;
    line-height: 1.95;
    color: #445466;
    background: #f8fbff;
    border: 1px solid #d7e4f2;
    border-left: 4px solid #1a4d8f;
    border-radius: 12px;
    padding: 16px 20px 16px 18px;
}

@media (max-width: 768px) {
    .challenges {
        padding: 72px 0 52px;
    }

    .challenges-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
        padding: 0;
    }

    .challenges-grid .challenge-card {
        flex-direction: column;
        align-items: center;
        padding: 18px 14px;
        gap: 10px;
        border-radius: 14px;
    }

    .challenges-grid .challenge-card i {
        width: 30px;
        height: 30px;
        font-size: 14px;
        margin-top: 0;
    }

    .challenges-grid .challenge-card p {
        width: 100%;
        font-size: 14px;
        line-height: 1.75;
    }

    .features-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
        padding: 0;
    }

    .features-grid .feature-card {
        padding: 14px 12px;
        border-radius: 14px;
        height: 290px;
    }

    .features-grid .feature-icon {
        width: 52px;
        height: 52px;
        margin-bottom: 12px;
        font-size: 20px;
    }

    .features-grid .feature-title {
        font-size: 17px;
        line-height: 1.45;
        margin-bottom: 10px;
        height: 50px;
    }

    .features-grid .feature-description {
        font-size: 14px;
        line-height: 1.5;
        text-align: left;
    }

    .governance-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
        padding: 0;
    }

    .governance-grid .governance-card {
        padding: 18px 14px;
        border-radius: 14px;
    }

    .governance-grid .governance-icon {
        width: 48px;
        height: 48px;
        margin-bottom: 12px;
        font-size: 18px;
    }

    .governance-grid .governance-title {
        font-size: 17px;
        margin-bottom: 8px;
    }

    .governance-grid .governance-description {
        font-size: 14px;
        line-height: 1.75;
        margin-bottom: 12px;
    }

    .governance-grid .governance-points li {
        gap: 8px;
        font-size: 13px;
        line-height: 1.65;
        margin-bottom: 8px;
    }

    .challenges-bridge {
        font-size: 13px;
        line-height: 1.7;
        padding: 12px 14px;
    }
}

/* ============================================
   Mobile Typography Rebalance
   ============================================ */
@media (max-width: 768px) {
    .hero-title {
        font-size: 28px;
        line-height: 1.35;
        letter-spacing: 1.2px;
        margin-bottom: 16px;
    }

    .hero-subtitle {
        font-size: 17px;
        line-height: 1.7;
        letter-spacing: 0.4px;
        margin-bottom: 20px;
    }

    .hero-description {
        font-size: 15px;
        line-height: 1.85;
        margin-bottom: 16px;
    }

    .hero-note {
        font-size: 13px;
        line-height: 1.7;
    }

    .section-title {
        font-size: 24px;
        line-height: 1.45;
        letter-spacing: 0.4px;
        margin-bottom: 14px;
    }

    .section-subtitle {
        font-size: 15px;
        line-height: 1.8;
    }

    .feature-title {
        font-size: 17px;
        line-height: 1.55;
    }

    .strength-title {
        font-size: 24px;
        line-height: 1.5;
        margin-bottom: 18px;
    }

    .governance-title {
        font-size: 17px;
        line-height: 1.5;
    }

    .benefits-title {
        font-size: 24px;
        line-height: 1.45;
        margin-bottom: 24px;
    }

    .features p,
    .strengths p,
    .flow p,
    .integration-text p,
    .governance p,
    .benefits p,
    .challenges p {
        font-size: 14px;
        line-height: 1.8;
    }

    .strength-list li,
    .governance-points li,
    .benefits-point li,
    .benefits-points li,
    .challenges li,
    .flow li {
        font-size: 14px;
        line-height: 1.7;
    }

    .benefits-point h3 {
        font-size: 17px;
        line-height: 1.5;
    }
}

/* ============================================
   Mobile Line-break & Leading Optimization
   ============================================ */
@media (max-width: 768px) {
    .hero-text {
        max-width: 34rem;
        margin-inline: auto;
    }

    .hero-title {
        max-width: 17em;
        margin-inline: auto;
        line-height: 1.42;
        letter-spacing: 0.04em;
        text-wrap: balance;
    }

    .hero-subtitle {
        max-width: 24em;
        margin-inline: auto;
        line-height: 1.75;
        letter-spacing: 0.02em;
        text-wrap: balance;
    }

    .hero-description {
        max-width: 28em;
        margin-inline: auto;
        line-height: 1.9;
    }

    .hero-note {
        max-width: 30em;
        margin-inline: auto;
        letter-spacing: 0.01em;
        line-height: 1.75;
    }

    .section-header {
        margin-bottom: 44px;
    }

    .section-title {
        max-width: 18em;
        margin-inline: auto;
        line-height: 1.52;
        letter-spacing: 0.03em;
        text-wrap: balance;
    }

    .section-subtitle {
        max-width: 32em;
        margin-inline: auto;
        line-height: 1.85;
    }

    .challenge-card p,
    .feature-description,
    .governance-description,
    .benefits-point p {
        line-height: 1.85;
        letter-spacing: 0.01em;
    }

    .challenge-card,
    .feature-card,
    .governance-card,
    .benefits-point {
        row-gap: 10px;
    }

    .final-cta-title {
        max-width: 15.5em;
        margin-inline: auto;
        margin-bottom: 18px;
        line-height: 1.45;
        letter-spacing: 0.03em;
        text-wrap: balance;
    }

    .final-cta-subtitle {
        max-width: 24em;
        margin-inline: auto;
        line-height: 1.85;
        letter-spacing: 0.01em;
        margin-bottom: 36px;
    }

    .final-cta-buttons {
        margin-bottom: 44px;
    }

    .footer-brand,
    .footer-links,
    .footer-bottom {
        max-width: 32rem;
        margin-inline: auto;
    }

    .footer-description {
        max-width: 28em;
        margin-inline: auto;
        line-height: 1.9;
        letter-spacing: 0.01em;
    }

    .footer-link-list li a,
    .footer-bottom p {
        line-height: 1.8;
        letter-spacing: 0.01em;
    }

    br.sp-only {
        display: block;
        content: "";
        margin-top: 0.25em;
    }

    .hero-description br,
    .benefits-description br,
    .final-cta-subtitle br:not(.sp-only),
    .footer-description br {
        display: none;
    }
}

/* ============================================
   Mobile Section Spacing Re-design
   ============================================ */
@media (max-width: 768px) {
    .hero {
        height: auto;
        min-height: 100svh;
        padding: 96px 0 72px;
    }

    section:not(.hero):not(.final-cta) {
        padding-top: 56px;
        padding-bottom: 56px;
    }

    .section-header {
        margin-bottom: 24px;
    }

    .challenges .section-header,
    .features .section-header,
    .governance .section-header,
    .strengths .section-header,
    .flow .section-header {
        margin-bottom: 22px;
    }

    .challenges-grid,
    .features-grid,
    .governance-grid {
        margin-bottom: 22px;
    }

    .strength-item {
        margin-bottom: 52px;
    }

    .integration-visual {
        margin-top: 42px;
    }

    .dashboard-preview {
        margin-bottom: 42px;
    }

    .benefits-description {
        margin-bottom: 32px;
    }

    .benefits-points {
        margin-bottom: 36px;
    }

    .benefits-point {
        margin-bottom: 22px;
    }

    .benefits-note {
        padding: 24px 20px;
    }

    .challenges-bridge {
        margin-top: 2px;
    }

    .final-cta {
        padding: 72px 20px;
    }

    .final-cta-contact {
        padding-top: 36px;
    }

    .footer {
        padding: 56px 0 24px;
    }

    .footer-content {
        margin-bottom: 20px;
    }
}

/* ============================================
   Strengths Mobile Optimization
   ============================================ */
@media (max-width: 768px) {
    .strength-item,
    .strength-item.reverse {
        display: flex;
        flex-direction: column;
        direction: ltr;
        gap: 24px;
        margin-bottom: 56px;
        padding: 0 20px;
    }

    .strength-item .strength-image,
    .strength-item .strength-text {
        width: 100%;
    }

    .strength-item .strength-image {
        order: 1;
    }

    .strength-item .strength-text {
        order: 2;
    }

    .strength-image img,
    .strength-image-placeholder {
        height: 260px;
        border-radius: 16px;
    }

    .strength-text {
        max-width: 36rem;
        margin: 0 auto;
    }

    .strength-description {
        margin-bottom: 16px;
        line-height: 1.7;
        font-size: 14px;
    }

    .strength-label {
        margin-bottom: 10px;
    }

    .strength-title {
        margin-bottom: 14px;
    }

    .strength-image {
        margin-bottom: -2px;
    }

    .strength-list li {
        padding: 6px 0;
        line-height: 1.6;
        align-items: flex-start;
    }

    .strength-list li i {
        margin-top: 2px;
        margin-right: 10px;
        font-size: 15px;
    }
}

/* ============================================
   Flow Mobile Vertical Optimization
   ============================================ */
@media (max-width: 768px) {
    .steps {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .step {
        min-width: 100%;
        padding: 28px 20px 22px;
        border-radius: 16px;
        box-shadow: 0 8px 24px rgba(17, 45, 84, 0.08);
    }

    .step-number {
        top: -16px;
        left: 20px;
        transform: none;
        width: 42px;
        height: 42px;
        font-size: 15px;
        letter-spacing: 0.04em;
        box-shadow: 0 8px 20px rgba(26, 77, 143, 0.28);
    }

    .step-icon {
        width: 76px;
        height: 76px;
        margin: 18px auto 16px;
        font-size: 30px;
    }

    .step-title {
        font-size: 18px;
        margin-bottom: 10px;
        line-height: 1.5;
    }

    .step-description {
        font-size: 14px;
        line-height: 1.8;
    }

    .step-arrow {
        display: flex;
        justify-content: center;
        align-items: center;
        color: #1a4d8f;
        opacity: 0.55;
        font-size: 20px;
        line-height: 1;
        margin: 2px 0;
    }

    .step-arrow i {
        transform: rotate(90deg);
    }
}

/* ============================================
   Hero Mobile Conversion Optimization
   ============================================ */
@media (max-width: 768px) {
    .hero {
        min-height: 100dvh;
        padding: 88px 0 50px;
        align-items: center;
    }

    .hero-content {
        width: 100%;
        max-width: 720px;
        padding: 0 20px;
    }

    .hero-text {
        max-width: 34rem;
        margin: 0 auto;
    }

    .hero-title {
        font-size: 29px;
        line-height: 1.4;
        letter-spacing: 0.03em;
        margin-bottom: 14px;
        text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }

    .hero-subtitle {
        font-size: 16px;
        line-height: 1.75;
        margin-bottom: 16px;
    }

    .hero-description {
        font-size: 14px;
        line-height: 1.8;
        margin-bottom: 10px;
        color: rgba(255, 255, 255, 0.94);
    }

    .hero-note {
        font-size: 12px;
        line-height: 1.65;
        margin-bottom: 26px;
        color: rgba(255, 255, 255, 0.86);
    }

    .hero-cta {
        width: 100%;
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .hero-cta .button {
        width: min(100%, 320px);
        min-height: 52px;
        padding: 14px 20px;
        border-radius: 14px;
        font-size: 16px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        line-height: 1.3;
    }

    .scroll-indicator {
        display: none;
    }
}

/* ============================================
   Footer Mobile Compact Layout
   ============================================ */
@media (max-width: 768px) {
    .footer {
        padding: 38px 0 18px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 10px;
        margin-bottom: 10px;
    }

    .footer-brand {
        margin-bottom: 0;
    }

    .footer-tagline {
        margin-bottom: 8px;
    }

    .footer-description {
        margin-bottom: 0;
        line-height: 1.65;
    }

    .footer-links {
        max-width: 100%;
        justify-self: center;
    }

    .footer-column h4 {
        margin-bottom: 10px;
        font-size: 15px;
    }

    .footer-column-content .footer-link-list,
    .footer-link-list {
        grid-template-columns: 1fr;
        gap: 4px;
        justify-items: center;
    }

    .footer-link-list li a {
        font-size: 13px;
        line-height: 1.5;
        padding: 1px 0;
    }

    .footer-bottom {
        padding-top: 12px;
    }

    .footer-bottom p {
        font-size: 12px;
        line-height: 1.6;
    }
}

/* ============================================
   Mobile Design System Harmonization
   ============================================ */
@media (max-width: 768px) {
    :root {
        --sp-card-radius: 16px;
        --sp-card-padding: 18px;
        --sp-body-size: 14px;
        --sp-body-line: 1.8;
        --sp-heading-size: 24px;
        --sp-shadow: 0 8px 24px rgba(17, 45, 84, 0.08);
        --sp-section-space: 56px;
    }

    section:not(.hero):not(.final-cta) {
        padding-top: var(--sp-section-space);
        padding-bottom: var(--sp-section-space);
    }

    .section-title,
    .benefits-title,
    .strength-title {
        font-size: var(--sp-heading-size);
    }

    .section-subtitle,
    .feature-description,
    .governance-description,
    .step-description,
    .strength-description,
    .benefits-description,
    .footer-description,
    .final-cta-subtitle,
    .challenge-card p,
    .benefits-point p {
        font-size: var(--sp-body-size);
        line-height: var(--sp-body-line);
    }

    .feature-card,
    .governance-card,
    .challenge-card,
    .step,
    .benefits-point,
    .benefits-note {
        border-radius: var(--sp-card-radius);
        box-shadow: var(--sp-shadow);
        padding: var(--sp-card-padding);
    }

    .feature-icon,
    .governance-icon,
    .step-icon {
        width: 64px;
        height: 64px;
        font-size: 24px;
    }

    .step-icon {
        margin: 16px auto 14px;
    }

    .button,
    .hero-cta .button,
    .button-large {
        min-height: 48px;
        border-radius: 14px;
    }

    .footer-link-list li a,
    .strength-list li,
    .governance-points li,
    .benefits-point li {
        font-size: var(--sp-body-size);
        line-height: 1.65;
    }

    .challenges-bridge {
        font-size: 13px;
        line-height: 1.7;
    }
}