:root {
    /* Color Palette */
    --primary: #0F172A; /* Deep Navy - Trust */
    --secondary: #334155; /* Slate - Text */
    --accent: #2563EB; /* Bright Blue - Tech/Action */
    --accent-light: #EFF6FF; /* Light Blue - Backgrounds */
    --bg-white: #FFFFFF;
    --bg-light: #F8FAFC;
    --text-gray: #64748B;
    --success: #10B981;
    
    /* Spacing */
    --section-padding: 80px 20px;
    --container-width: 1100px;
}

html {
    width: 100%;
    overflow-x: hidden;
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--secondary);
    background-color: var(--bg-white);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    width: 100%;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    color: var(--primary);
    font-weight: 700;
    line-height: 1.4;
}

a {
    text-decoration: none;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
}

.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.mt-2 { margin-top: 1rem; }
.mb-4 { margin-bottom: 2rem; }

/* Position utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }

/* Size utilities */
.w-full { width: 100%; }
.h-full { height: 100%; }

/* Display utilities */
.block { display: block; }

/* Object fit utilities */
.object-contain { object-fit: contain; }

/* Animation Classes */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.fade-in-up.visible {
    padding-bottom: 15px;
    margin: 0 auto;
    opacity: 1;
    transform: translateY(0);
}

/* --- Header --- */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid #e2e8f0;
    padding: 15px 0;
}

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

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

.header-buttons {
    display: flex;
    gap: 12px;
    align-items: center;
}

.btn-header {
    padding: 10px 20px;
    background-color: var(--primary);
    color: #fff;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
}
.btn-header:hover { background-color: var(--accent); }

.btn-header-secondary {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}
.btn-header-secondary:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    padding-top: 140px;
    padding-bottom: 80px;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.7) 0%, rgba(248, 250, 252, 0.8) 100%);
    z-index: 1;
}

.hero-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-tag {
    display: inline-block;
    background: var(--accent-light);
    color: var(--accent);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 24px;
    letter-spacing: -0.05em;
}

.hero-sub {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 32px;
}

.hero-benefits {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.benefit-item {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--secondary);
}
.benefit-item svg {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    color: var(--success);
}

.cta-group {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-block;
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}
.btn-primary:hover {
    background-color: #1d4ed8;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #fff;
    color: var(--secondary);
    border: 1px solid #cbd5e1;
}
.btn-secondary:hover {
    background-color: var(--bg-light);
    border-color: var(--accent);
    color: var(--accent);
}

.hero-visual {
    position: relative;
    width: 100%;
    max-width: 100%;
}

.hero-visual.fade-in-up {
    transform: translateY(30px) translateX(10%) scale(1.2);
}

.hero-visual.fade-in-up.visible {
    transform: translateY(0) translateX(10%) scale(1.2);
}

.hero-visual img {
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border: 1px solid rgba(0,0,0,0.05);
}

/* SP版用の動画（デフォルトは非表示） */
.hero-visual-mobile {
    display: none;
}

/* Window Frame Styles */
.window-frame {
    background: rgba(15, 23, 42, 0.8); /* slate-900/80 */
    padding: 0.75rem;
    border-radius: 1rem;
    border: 1px solid rgba(51, 65, 85, 0.7); /* slate-700 */
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(12px);
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.window-header {
    margin-bottom: 0.75rem;
}

.window-controls {
    display: flex;
    gap: 0.5rem;
}

.window-control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.window-control-close {
    background-color: #ef4444; /* red-500 */
}

.window-control-minimize {
    background-color: #eab308; /* yellow-500 */
}

.window-control-maximize {
    background-color: #22c55e; /* green-500 */
}

.window-content {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    background: #1e293b; /* slate-800 */
    border-radius: 0.5rem;
    overflow: hidden;
}

.window-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* --- Intro Section --- */
.intro {
    padding: var(--section-padding);
    background-color: var(--bg-white);
}

.intro-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.intro h2 {
    font-size: 2rem;
    margin-bottom: 30px;
}

.intro p {
    color: var(--text-gray);
    font-size: 1.05rem;
    margin-bottom: 16px;
    word-break: keep-all;
    overflow-wrap: break-word;
    line-break: strict;
}

/* --- Concept Section --- */
.concept {
    padding: var(--section-padding);
    background-color: var(--primary);
    color: #fff;
    text-align: center;
}

.concept h2 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 2.2rem;
}

.concept-flow {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 60px;
    flex-wrap: wrap;
}

.flow-card {
    background: rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: 12px;
    width: 220px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.1);
    position: relative;
}

.flow-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    display: block;
}

.flow-arrow {
    font-size: 1.5rem;
    color: rgba(255,255,255,0.5);
}

.flow-label {
    font-weight: 700;
    display: block;
    margin-bottom: 5px;
}
.flow-desc {
    font-size: 0.85rem;
    opacity: 0.8;
}

/* --- Usage Steps --- */
.usage {
    padding: var(--section-padding);
    background-color: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 60px;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
}

.step-card {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
    border: 1px solid #e2e8f0;
}

.step-num {
    position: absolute;
    top: -10px;
    right: -10px;
    font-size: 5rem;
    font-weight: 900;
    color: var(--accent-light);
    z-index: 0;
    opacity: 0.5;
}

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

.step-title {
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary);
}

/* --- Features --- */
.features {
    padding: var(--section-padding);
}

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

.feature-item h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.feature-icon {
    color: var(--accent);
    background: var(--accent-light);
    padding: 10px;
    border-radius: 8px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* --- Security/Local --- */
.security {
    padding: var(--section-padding);
    background-color: #F1F5F9;
}

.security-box {
    background: #fff;
    border-radius: 16px;
    padding: 60px;
    text-align: center;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
}

.security-list {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.sec-item {
    flex: 1;
    min-width: 200px;
}
.sec-item strong {
    display: block;
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary);
}

/* --- Use Cases --- */
.cases {
    padding: var(--section-padding);
}

.case-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.case-card {
    border: 1px solid #e2e8f0;
    padding: 24px;
    border-radius: 8px;
    transition: 0.3s;
    text-align: center;
}
.case-card:hover {
    border-color: var(--accent);
    background: var(--accent-light);
}
.case-icon {
    font-size: 2rem;
    margin-bottom: 15px;
    display: block;
}

/* --- Target & Flow --- */
.target {
    padding: var(--section-padding);
    background-color: var(--primary);
    color: #fff;
    text-align: center;
}
.target h2 { color: #fff; }

.target-list {
    max-width: 600px;
    margin: 40px auto 0;
    text-align: left;
}
.target-list li {
    background: rgba(255,255,255,0.1);
    margin-bottom: 15px;
    padding: 20px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 15px;
}
.check-icon {
    color: var(--success);
    flex-shrink: 0;
}

/* --- Footer --- */
.footer-cta {
    padding: 100px 20px;
    text-align: center;
    background: linear-gradient(to top, #fff 0%, var(--bg-light) 100%);
}

.footer-cta h2 {
    font-size: 2.5rem;
    margin-bottom: 40px;
}

/* --- Contact Form Section --- */
.contact-form-section {
    padding: var(--section-padding);
    background-color: var(--bg-white);
}

.contact-form-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.contact-form-header {
    background: var(--bg-white);
    color: var(--primary);
    padding: 40px;
    text-align: center;
    border-bottom: 1px solid #e2e8f0;
}

.contact-form-header h2 {
    color: var(--primary);
    font-size: 2rem;
    margin-bottom: 12px;
}

.contact-form-header p {
    color: var(--text-gray);
    font-size: 0.95rem;
}

.contact-form-container {
    padding: 40px;
}

.form-section-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    margin: 40px 0 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent-light);
}

.form-section-title:first-of-type {
    margin-top: 0;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.required {
    color: #ef4444;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: none;
    border-bottom: 1px solid #e2e8f0;
    border-radius: 0;
    font-size: 1rem;
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--secondary);
    background-color: var(--bg-white);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-bottom-color: var(--accent);
    border-bottom-width: 2px;
}

.form-group input::placeholder {
    color: #94a3b8;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23334155' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    cursor: pointer;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-option {
    display: flex;
    align-items: center;
    padding: 16px;
    border: none;
    border-bottom: 1px solid #e2e8f0;
    border-radius: 0;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--bg-white);
}

.radio-option:hover {
    background-color: var(--bg-light);
    border-bottom-color: var(--accent);
}

.radio-option input[type="radio"] {
    width: 20px;
    height: 20px;
    margin-right: 12px;
    cursor: pointer;
    accent-color: var(--accent);
}

.radio-option span {
    font-weight: 500;
    color: var(--secondary);
}

.radio-option.checked {
    background-color: var(--accent-light);
    border-bottom-color: var(--accent);
    border-bottom-width: 2px;
}

.radio-option.checked span {
    font-weight: 700;
    color: var(--accent);
}

.radio-option input[type="radio"] {
    accent-color: var(--accent);
}

.form-submit {
    margin-top: 40px;
    text-align: center;
}

.form-submit .btn {
    min-width: 280px;
    font-size: 1.1rem;
    padding: 18px 40px;
}

.success-message {
    padding: 60px 40px;
    text-align: center;
}

.success-message.hidden {
    display: none;
}

.success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background-color: var(--accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.success-message h3 {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.success-message p {
    color: var(--text-gray);
    margin-bottom: 32px;
    line-height: 1.8;
}

footer {
    background: var(--primary);
    color: var(--text-gray);
    padding: 40px 20px;
    text-align: center;
    font-size: 0.9rem;
}

/* --- Modal Styles --- */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    z-index: 2001;
    width: 90%;
    max-width: 1000px;
    animation: modalFadeIn 0.3s ease-out;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal .window-frame {
    margin: 0;
    max-width: 100%;
}

.modal-close {
    position: absolute;
    top: -50px;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--primary);
}

.modal-close:hover {
    background: #fff;
    transform: rotate(90deg);
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    /* 禁則処理 - 句点が改行されないように */
    p, h1, h2, h3, h4, span, div {
        word-break: keep-all;
        overflow-wrap: break-word;
        line-break: strict;
    }
    
    /* Container - コンテナの調整 */
    .container {
        padding: 0 10px;
        max-width: 100%;
        margin: 0 auto;
        width: 100%;
        box-sizing: border-box;
    }
    
    /* セクション全体の調整 */
    section {
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
        box-sizing: border-box;
    }
    
    /* Header - ヘッダーを小さく */
    header {
        padding: 8px 0;
    }
    .logo {
        font-size: 1.2rem;
        gap: 5px;
        letter-spacing: -0.02em;
    }
    .logo svg {
        width: 20px;
        height: 20px;
    }
    .header-buttons {
        gap: 6px;
    }
    .btn-header {
        padding: 6px 10px;
        font-size: 0.75rem;
        border-radius: 4px;
    }
    
    /* Hero - メインビジュアル */
    .hero {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding: 75px 0 40px;
    }
    .hero .container {
        padding: 0 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 30px;
        width: 100%;
        max-width: 100%;
    }
    .hero-text {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .hero h1 {
        font-size: 1.7rem;
        margin-bottom: 16px;
        line-height: 1.5;
    }
    .hero-sub {
        font-size: 0.9rem;
        margin-bottom: 20px;
        line-height: 1.7;
    }
    .hero-tag {
        font-size: 0.75rem;
        padding: 4px 10px;
        margin-bottom: 12px;
    }
    .hero-video {
        object-fit: cover;
    }
    .hero-benefits {
        flex-direction: column;
        gap: 8px;
        margin-bottom: 24px;
    }
    .benefit-item {
        font-size: 0.8rem;
    }
    .cta-group {
        flex-direction: column;
        gap: 12px;
        width: 100%;
        max-width: 100%;
    }
    .btn {
        padding: 12px 20px;
        font-size: 0.85rem;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    
    /* Hero Visual - PC版の動画を非表示 */
    .hero-visual {
        display: none;
    }
    
    /* Hero Visual Mobile - SP版の動画を表示 */
    .hero-visual-mobile {
        display: block;
        width: 100%;
        max-width: 100%;
        margin: 20px auto;
        padding: 0;
    }
    .hero-visual-mobile .window-frame {
        max-width: 100%;
    }
    
    /* Window Frame - windowのサイズ調整 */
    .window-frame {
        padding: 0.35rem;
        max-width: 100%;
        border-radius: 0.7rem;
        margin: 0 auto;
    }
    .window-header {
        margin-bottom: 0.35rem;
    }
    .window-control {
        width: 7px;
        height: 7px;
    }
    .window-controls {
        gap: 0.4rem;
    }
    .window-content {
        border-radius: 0.35rem;
    }
    
    /* Sections - セクションの調整 */
    .intro {
        padding: 60px 0;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .intro .container {
        padding: 0 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .intro h2,
    .section-title {
        font-size: 1.35rem;
        margin-bottom: 24px;
        line-height: 1.5;
    }
    .intro p {
        font-size: 0.85rem;
        line-height: 1.7;
    }
    
    /* Features - 機能セクション */
    .features {
        padding: 60px 0;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        overflow-x: hidden;
    }
    .features .container {
        padding: 0 15px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 18px;
        width: 100%;
        max-width: 100%;
    }
    .feature-item {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        padding: 0;
        overflow: hidden;
    }
    .feature-item h3 {
        font-size: 0.85rem;
        line-height: 1.4;
        margin-bottom: 10px;
        word-break: keep-all;
        overflow-wrap: anywhere;
        gap: 6px;
        flex-wrap: wrap;
        align-items: center;
        max-width: 100%;
        padding-right: 0;
    }
    .feature-item .feature-icon {
        flex-shrink: 0;
        width: 36px;
        height: 36px;
        padding: 7px;
        border-radius: 6px;
    }
    .feature-item .feature-icon svg {
        width: 18px;
        height: 18px;
    }
    .feature-item p {
        font-size: 0.75rem;
        line-height: 1.65;
        word-break: keep-all;
        overflow-wrap: anywhere;
        max-width: 100%;
        padding-right: 0;
    }
    
    /* Cases - 使用例セクション */
    .cases {
        padding: 60px 0;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .cases .container {
        padding: 0 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .case-cards {
        width: 100%;
        max-width: 100%;
    }
    .case-card {
        padding: 18px 12px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .case-card h4 {
        font-size: 0.95rem;
        line-height: 1.4;
    }
    .case-card p {
        font-size: 0.8rem;
        line-height: 1.6;
    }
    
    /* Concept - コンセプトセクション */
    .concept {
        padding: 60px 0;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .concept .container {
        padding: 0 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .concept h2 {
        font-size: 1.4rem;
        line-height: 1.5;
        margin-bottom: 16px;
    }
    .concept > .container > p {
        font-size: 0.85rem;
        line-height: 1.6;
    }
    .concept-flow {
        width: 100%;
        max-width: 100%;
    }
    .flow-card {
        width: 100%;
        max-width: 280px;
        padding: 18px 12px;
        box-sizing: border-box;
    }
    .flow-label {
        font-size: 0.9rem;
    }
    .flow-desc {
        font-size: 0.8rem;
    }
    .flow-arrow {
        transform: rotate(90deg);
        margin: 10px 0;
    }
    
    /* Usage Steps - ステップカードの調整 */
    .usage {
        padding: 60px 0;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .usage .container {
        padding: 0 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .steps-grid {
        grid-template-columns: 1fr;
        gap: 14px;
        width: 100%;
        max-width: 100%;
    }
    .step-card {
        padding: 14px 10px;
        margin: 0;
        overflow: hidden;
        box-sizing: border-box;
        width: 100%;
        max-width: 100%;
    }
    .step-num {
        font-size: 2.5rem;
        top: -8px;
        right: -5px;
        opacity: 0.4;
    }
    .step-title {
        font-size: 0.9rem;
        margin-bottom: 8px;
        line-height: 1.4;
        word-break: keep-all;
        overflow-wrap: break-word;
        padding-right: 12px;
        max-width: 93%;
    }
    .step-content {
        padding-right: 8px;
        max-width: 100%;
    }
    .step-content p {
        font-size: 0.78rem;
        line-height: 1.65;
        word-break: keep-all;
        overflow-wrap: break-word;
        max-width: 98%;
    }
    
    /* Security - セキュリティセクション */
    .security {
        padding: 60px 0;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .security .container {
        padding: 0 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .security-box {
        padding: 24px 10px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .security h2 {
        font-size: 1.4rem;
        margin-bottom: 12px;
    }
    .security-box > p {
        font-size: 0.85rem;
        line-height: 1.6;
    }
    .security-list {
        flex-direction: column;
        gap: 20px;
        margin-top: 30px;
        width: 100%;
        max-width: 100%;
    }
    .sec-item {
        min-width: 100%;
        width: 100%;
        max-width: 100%;
        padding: 0 4px 0 0;
        box-sizing: border-box;
    }
    .sec-item strong {
        font-size: 0.95rem;
        line-height: 1.5;
        display: block;
        margin-bottom: 8px;
        word-break: keep-all;
        overflow-wrap: break-word;
        padding-right: 4px;
    }
    .sec-item p {
        font-size: 0.85rem;
        line-height: 1.7;
        word-break: keep-all;
        overflow-wrap: break-word;
        padding-right: 4px;
        max-width: 98%;
    }
    
    /* Target - ターゲットセクション */
    .target {
        padding: 60px 0;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .target .container {
        padding: 0 15px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .target h2 {
        font-size: 1.4rem;
        line-height: 1.5;
    }
    .target-list {
        padding: 0;
        margin: 30px auto 0;
        max-width: 100%;
        width: 100%;
        box-sizing: border-box;
    }
    .target-list li {
        padding: 14px 12px;
        font-size: 0.85rem;
        line-height: 1.7;
        gap: 12px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        overflow: hidden;
    }
    .target-list li span {
        word-break: keep-all;
        overflow-wrap: anywhere;
        flex: 1;
        min-width: 0;
    }
    .check-icon {
        flex-shrink: 0;
        width: 20px;
        height: 20px;
        min-width: 20px;
    }
    
    /* Modal - モーダルの調整 */
    .modal-content {
        width: 94%;
        max-width: 94%;
        margin: 0 auto;
    }
    .modal .window-frame {
        padding: 0.35rem;
    }
    .modal-close {
        top: -40px;
        width: 32px;
        height: 32px;
    }
    .modal-close svg {
        width: 16px;
        height: 16px;
    }
    
    /* Form - フォームの調整 */
    .contact-form-section {
        padding: 60px 0;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .contact-form-section .container {
        padding: 0 12px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .contact-form-wrapper {
        max-width: 100%;
        width: 100%;
        box-sizing: border-box;
    }
    .contact-form-header {
        padding: 20px 12px;
    }
    .contact-form-header h2 {
        font-size: 1.25rem;
        line-height: 1.5;
    }
    .contact-form-header p {
        font-size: 0.8rem;
        line-height: 1.6;
    }
    .contact-form-container {
        padding: 20px 12px;
    }
    .form-section-title {
        font-size: 1rem;
        margin: 24px 0 16px;
        line-height: 1.4;
    }
    .form-group {
        margin-bottom: 18px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .form-group label {
        font-size: 0.85rem;
        line-height: 1.5;
    }
    .form-group input,
    .form-group select {
        font-size: 0.85rem;
        padding: 10px 12px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .radio-option {
        padding: 12px;
    }
    .radio-option span {
        font-size: 0.85rem;
        line-height: 1.5;
    }
    .form-submit .btn {
        min-width: 100%;
        width: 100%;
        padding: 14px 20px;
        font-size: 0.9rem;
        box-sizing: border-box;
    }
    .success-message {
        padding: 40px 12px;
    }
    .success-message h3 {
        font-size: 1.25rem;
        line-height: 1.5;
    }
    .success-message p {
        font-size: 0.85rem;
        line-height: 1.7;
    }
    
    /* Footer CTA */
    .footer-cta {
        padding: 60px 0;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .footer-cta .container {
        padding: 0 12px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .footer-cta h2 {
        font-size: 1.5rem;
        margin-bottom: 20px;
        line-height: 1.5;
    }
    .footer-cta p {
        font-size: 0.85rem;
        line-height: 1.7;
    }
    
    /* Footer */
    footer {
        padding: 30px 12px;
        font-size: 0.8rem;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
}