/* リセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

.page-container {
    min-height: 100vh;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 1rem;
    padding: 0 1rem;
}

/* イメージラップ */

.link-2 {
    color: #ffff;
    cursor: pointer;
}

.link-3 {
    color: #2fd2bf;
}

/* ヒーローセクション */
.hero-section {
    position: relative;
    color: #ffffff;
    height: 90vh;
    width: 100%;
    margin-bottom: 30px;
}

@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
    }
}

.hero-section img{
    aspect-ratio: 16 / 9;
    width: 100%;
	height: 100vh;
	position: absolute;
    object-fit: center;
}

@media (max-width: 768px) {
    .hero-section img {
        height: 90vh;
    }
}


.hero-content {
    max-width: 64rem;
    margin: 0 auto;
    text-align: center;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #bfdbfe;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .hero-subtitle {
        font-size: 1.5rem;
    }
}

.hero-description {
    font-size: 1.125rem;
    color: #dbeafe;
    max-width: 42rem;
    margin: 0 auto;
}

.hero-title {
	color: #8c8c8c;
    font-style: italic;
    font-size: 7rem;
    font-family: "Roboto Condensed", "Helvetica Neue", Arial, sans-serif;
	font-weight: 800;
    letter-spacing: 0.1em;
	text-shadow: 1px 2px 3px #4D4D4D;
	padding: 40px;
	position: absolute;
	bottom: 30%;
	left: 10%;
	height: 30%;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 4.5rem;
		bottom: 20%
    }
}

.under-line {
	text-decoration: underline;
	text-decoration-color: #4DB56A;
}

.top p {
	font-size: 32px;
	color: white;
	text-shadow: 1px 2px 3px #4D4D4D;
	padding: 40px;
	position: absolute;
	bottom: 0;
	left: 0;
	font-weight: bold;
}

.top-p-1 {
	font-size: 2rem;
	color: white;
	text-shadow: 1px 2px 3px #4D4D4D;
	position: absolute;
	bottom: 0;
	left: 0;
	font-weight: bold;
	height: 20%;
}

@media (max-width: 768px) {
    .top-p-1 {
    font-size: 1.4rem;
    }
}

/* 製品の特徴セクション */
.features-section {
    padding: 1rem 0;
    display: flex;
    justify-content: center;
}

@media (min-width: 768px) {
    .features-section {
        padding: 2rem 0;
    }
}

.section-header {
    text-align: center;
    margin-bottom: 2rem;
}

.section-title {
    font-size: 2rem;
    font-weight: bold;
    margin: 1rem;
    padding: 0.4em 0.5em;/*文字の上下 左右の余白*/
    color: #494949;/*文字色*/
    background: #f4f4f4;/*背景色*/
    border-left: solid 5px #7db4e6;/*左線*/
    border-bottom: solid 3px #d7d7d7;
}

@media (min-width: 768px) {
    .section-title {
        font-size: 3rem;
    }
}

.section-subtitle {
    font-size: 1.25rem;
    color: #6b7280;
}

.features-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.feature-card {
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    background: #ffffff;
    transition: all 0.3s ease;
}

.feature-card:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.feature-header {
    padding: 1.5rem;
}

.feature-icon {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 9999px;
    background-color: #dbeafe;
    color: #2563eb;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: bold;
    color: #1f2937;
}

.feature-content {
    padding: 0 1.5rem 1.5rem;
}

.feature-description {
    color: #4b5563;
    font-size: 1.125rem;
    line-height: 1.75;
}

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

.feature-list-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.check-icon {
    color: #059669;
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.container img{
    width: 100%;
    height: 50vh;
    object-fit: cover;
    background: linear-gradient(to right, #eff6ff, #e0e7ff);
    padding: 1rem 0;
    border-radius: 0.5rem;
}

/* 製品の原理セクション */
.principle-section {
    background-color: #f9fafb;
    padding: 2rem 0;
    display: flex;
    justify-content: center;
}

@media (min-width: 768px) {
    .principle-section {
        padding: 2rem 0;
    }
}

.principle-card-main {
    background: #ffffff;
    border: 2px solid #bfdbfe;
    border-radius: 0.5rem;
    margin-bottom: 3rem;
    overflow: hidden;
}

.principle-header {
    background: linear-gradient(to right, #eff6ff, #dbeafe);
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.principle-icon-large {
    width: 4rem;
    height: 4rem;
    border-radius: 9999px;
    background-color: #2563eb;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.principle-title {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

@media (min-width: 768px) {
    .principle-title {
        font-size: 1.875rem;
    }
}

.principle-subtitle {
    font-size: 1.125rem;
    color: #4b5563;
}

.principle-content {
    padding: 2rem;
}

.challenge-box {
    background-color: #fffbeb;
    border-left: 4px solid #f59e0b;
    padding: 1.5rem;
    border-radius: 0.25rem;
    margin-bottom: 1.5rem;
}

.nozzle-steps {
    display: flex;
}

.solution-box {
    background-color: #eff6ff;
    border-left: 4px solid #2563eb;
    padding: 1.5rem;
    border-radius: 0.25rem;
    margin-bottom: 2rem;
}

.box-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: #111827;
}

.box-text {
    color: #4b5563;
    line-height: 1.75;
}

.highlight {
    color: #1d4ed8;
    font-weight: bold;
}

.nozzle-step {
    background: #ffffff;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.nozzle-steps img {
    width: 50%;
	height: 100%;
	object-fit:inherit;
}

.step-number {
    width: 3rem;
    height: 3rem;
    background-color: #dbeafe;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.5rem;
    color: #2563eb;
    font-weight: bold;
}

.step-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.step-description {
    font-size: 0.875rem;
    color: #6b7280;
}

/* 流体工学の原理カード */
.principle-card-secondary {
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    overflow: hidden;
}

.principle-header-secondary {
    background: linear-gradient(to right, #f9fafb, #f3f4f6);
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.principle-icon-secondary {
    width: 4rem;
    height: 4rem;
    border-radius: 9999px;
    background-color: #374151;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.principle-title-secondary {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.principle-subtitle-secondary {
    font-size: 1rem;
    color: #4b5563;
}

.principle-explanation {
    background: linear-gradient(to right, #eff6ff, #e0e7ff);
    padding: 2rem;
    border-radius: 0.5rem;
}

.explanation-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #111827;
}

.explanation-steps {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.explanation-step {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.step-check {
    width: 2rem;
    height: 2rem;
    background-color: #2563eb;
    color: #ffffff;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.explanation-text {
    color: #4b5563;
    line-height: 1.75;
}

.principle-step {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.principle-icon {
    width: 32px;
    height: 32px;
    background-color: #2563eb;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 4px;
}

.result-step .result-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #f97316 0%, #dc2626 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 4px;
}

.principle-text {
    color: #4b5563;
    line-height: 3;
}

.result-label {
    font-weight: 600;
}

.strength-box {
    background-color: #d1fae5;
    border: 2px solid #6ee7b7;
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin-top: 1.5rem;
}

.strength-text {
    font-size: 1.125rem;
    text-align: center;
    color: #111827;
}

.strength-highlight {
    color: #047857;
}

.principle-image {
    margin-top: 3rem;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.principle-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* まとめセクション */
.summary-section {
    padding: 2rem 0;
}

@media (min-width: 768px) {
    .summary-section {
        padding: 1rem 0;
    }
}

.summary-card {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: #ffffff;
    border-radius: 1rem;
    padding: 3rem 2rem;
    max-width: 64rem;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .summary-card {
        padding: 3rem;
    }
}

.summary-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 1.5rem;
    text-shadow: 1px 2px 3px #4D4D4D;
}

@media (min-width: 768px) {
    .summary-title {
        font-size: 2.5rem;
    }
}

.summary-grid {
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
    grid-template-columns: 1fr;
    justify-items: center
}

@media (min-width: 768px) {
    .summary-grid {
        justify-content: space-around;
    }
}

.summary-column {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.summary-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.summary-check {
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.summary-text {
    font-size: 1.125rem;
}

.a-center {
    text-align: center;
}

.a-center:hover {
    color: white;
    transform: translate(5px, 0);
    transition: 0.2s;
}