/* ================================
   リセットCSS
================================ */


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

body {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 400;
    color: #363737;
    line-height: 1.7;
    background-color: #ffffff;
}



ul, ol {
    list-style: none;
    padding-left: 0;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ================================
   カラー設定
================================ */
:root {
    --color-primary: #2673BF;
    --color-secondary: #2998FF;
    --color-accent: #C8DAEC;
    --color-text-primary: #363737;
    --color-text-secondary: #000000;
    --color-text-gray: #626668;
    --color-background: #F0F3F6;
    --color-white: #FFFFFF;
}

/* ================================
   共通クラス
================================ */
.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 20px;
}

@media (min-width: 768px) {
    .container {
        padding: 0 40px;
    }
}

/* ================================
   ヘッダー
================================ */
.header {
    width: 100%;
}

.header__image {
    width: 100%;
    height: auto;
}

/* ================================
   ヒーローセクション
================================ */
.hero {
    padding: 40px 0;
    text-align: center;
}

.hero__title {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.6;
    letter-spacing: 0.02em;
}

@media (min-width: 768px) {
    .hero {
        padding: 60px 0;
    }
    
    .hero__title {
        font-size: 2.75rem;
    }
}

/* ================================
   セクションタイトル
================================ */
.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title__en {
    display: block;
    font-family: 'Akshar', sans-serif;
    font-weight: 600;
    font-size: 3rem;
    line-height: 1;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.section-title__en--white {
    color: var(--color-white);
}

.section-title__jp {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-text-primary);
}

@media (min-width: 768px) {
    .section-title__en {
        font-size: 5rem;
    }
}

/* ================================
   特徴セクション
================================ */
.features {
    padding: 60px 0;
    background-color: var(--color-white);
}

.features__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 768px) {
    .features {
        padding: 80px 0;
    }
    
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }
}

@media (min-width: 1200px) {
    .features__grid {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 28px;
    }
    
    .feature-card {
        width: 308px;
        flex: 0 0 308px;
        min-height: 444px;
    }
    
    .feature-card:nth-child(1),
    .feature-card:nth-child(2) {
        width: 476px;
        flex: 0 0 476px;
        min-height: 403px;
    }
}

/* フィーチャーカード */
.feature-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-accent);
    border-radius: 20px;
    padding: 20px 20px 40px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    min-height: 403px;
}

.feature-card__title {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
}

.feature-card__value {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.feature-card__number {
    font-family: 'Akshar', sans-serif;
    font-weight: 600;
    font-size: 4.5rem;
    line-height: 1;
    color: var(--color-primary);
}

.feature-card__unit {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.feature-card__unit-small {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-right: 4px;
}

.feature-card__icon {
    width: 100%;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-card__icon svg {
    width: auto;
    height: 100%;
    max-width: 100%;
}

.feature-card__icon-img {
    width: auto;
    height: 100%;
    max-width: 100%;
    object-fit: contain;
}

.feature-card__icon--welding {
    position: relative;
}

.feature-card__desc {
    font-size: 0.875rem;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

@media (min-width: 768px) {
    .feature-card__title {
        font-size: 1.375rem;
    }
    
    .feature-card__number {
        font-size: 5.625rem;
    }
    
    .feature-card__unit {
        font-size: 2.875rem;
    }
}

/* ================================
   チームワークセクション
================================ */
.teamwork {
    padding: 60px 0;
    background-color: var(--color-background);
}

.teamwork__subtitle {
    text-align: center;
    font-size: 1rem;
    letter-spacing: 0.04em;
    margin-bottom: 40px;
}

.teamwork__list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

@media (min-width: 768px) {
    .teamwork {
        padding: 80px 0;
    }
}

/* チームワークカード */
.teamwork-card {
    background-color: var(--color-white);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.teamwork-card__content {
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    height: 100%;
    justify-content: flex-start;
}

.teamwork-card__tag {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 12px 16px;
    border-radius: 0;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    align-self: flex-start;
}

.teamwork-card__tag i {
    font-size: 20px;
}

.teamwork-card__tag span {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.teamwork-card__detail {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.teamwork-card__section {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.teamwork-card__heading {
    display: flex;
    align-items: center;
    gap: 8px;
}

.teamwork-card__bar {
    display: inline-block;
    width: 12px;
    height: 10px;
    background-color: var(--color-primary);
}

.teamwork-card__heading h4 {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
}

.teamwork-card__section p {
    font-size: 1rem;
    letter-spacing: 0.04em;
    line-height: 1.7;
}

.teamwork-card__image {
    width: 100%;
    height: 360px;
    overflow: hidden;
}

.teamwork-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (min-width: 768px) {
    .teamwork-card {
        flex-direction: row;
        align-items: stretch;
        min-height: 360px;
    }
    
    .teamwork-card--reverse {
        flex-direction: row-reverse;
    }
    
    .teamwork-card__content {
        flex: 1;
        padding: 48px;
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
    }
    
    .teamwork-card__image {
        width: 360px;
        height: auto;
        min-height: 360px;
        flex-shrink: 0;
    }
}

/* ================================
   コミュニケーションセクション
================================ */
.communication {
    padding: 60px 20px;
    background-color: var(--color-white);
    text-align: center;
    overflow-x: hidden;
}

.communication .section-title__en {
    color: var(--color-primary);
}

.communication .section-title__jp {
    color: var(--color-text-primary);
}

.communication__card {
    background-color: var(--color-white);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    max-width: 1440px;
    margin: 0 auto;
}

.communication__content {
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    background-color: var(--color-primary);
}

.communication__item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.communication__item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.communication__text {
    text-align: left;
}

.communication__badge {
    background-color: var(--color-white);
    color: var(--color-text-primary);
    width: 90px;
    height: 90px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.communication__badge span {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.communication__text h4 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--color-white);
    margin-bottom: 8px;
}

.communication__text p {
    font-size: 1rem;
    letter-spacing: 0.04em;
    line-height: 1.7;
    color: var(--color-white);
}

.communication__image {
    display: none;
}

@media (min-width: 768px) {
    .communication {
        padding: 80px 20px;
    }
    
    .communication__badge span {
        font-size: 2rem;
    }
    
    .communication__text h4 {
        font-size: 1.375rem;
    }
}

@media (min-width: 1024px) {
    .communication__card {
        flex-direction: row;
        align-items: stretch;
        width: 100%;
        max-width: calc(100vw - 40px);
    }
    
    .communication__content {
        padding: 90px 80px;
        flex: 1;
        max-width: 720px;
        background-color: var(--color-primary);
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 24px;
    }
    
    .communication__image {
        display: block;
        width: calc((100% - 720px) / 2);
        max-width: 360px;
        min-height: 570px;
        overflow: hidden;
        flex-shrink: 0;
    }
    
    .communication__image--left {
        border-radius: 20px 0 0 20px;
    }
    
    .communication__image--right {
        border-radius: 0 20px 20px 0;
    }
    
    .communication__image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
    }
}

@media (min-width: 1460px) {
    .communication {
        padding: 80px 0;
    }
    
    .communication__card {
        max-width: 1440px;
    }
    
    .communication__content {
        width: 720px;
        padding: 90px 90px;
    }
    
    .communication__image {
        width: 360px;
    }
}

/* ================================
   環境セクション
================================ */
.environment {
    padding: 60px 0;
    background-color: var(--color-white);
    position: relative;
}

.environment__header {
    margin-bottom: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.environment__header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.environment__title {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.6;
    letter-spacing: 0.02em;
    color: var(--color-text-primary);
    margin-top: 24px;
}

.environment__logo {
    width: 100%;
    max-width: 300px;
}

.environment__logo img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.environment__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.environment__item {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: stretch;
}

.environment__header-item {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
}

.environment__number {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
}

.environment__line {
    flex: 1;
    height: 1px;
    background-color: var(--color-accent);
}

.environment__num {
    font-family: 'Akshar', sans-serif;
    font-weight: 600;
    font-size: 1.75rem;
    line-height: 1;
    color: var(--color-primary);
}

.environment__header-item h4 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
}

.environment__list {
    padding-left: 20px;
    margin-bottom: 32px;
}

.environment__list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: 1rem;
    letter-spacing: 0.04em;
    line-height: 1.7;
    color: var(--color-text-primary);
}

.environment__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.65em;
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

.environment__image {
    width: 100%;
    height: 300px;
    border-radius: 12px;
    overflow: hidden;
}

.environment__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (min-width: 768px) {
    .environment {
        padding: 80px 0;
    }
    
    .environment__header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 40px;
    }
    
    .environment__header-content {
        flex: 0 0 auto;
        align-items: flex-start;
        max-width: 616px;
    }
    
    .environment__logo {
        flex: 0 0 auto;
        width: 335px;
        max-width: 335px;
    }
    
    .environment__title {
        font-size: 2.25rem;
        margin-top: 40px;
    }
    
    .environment__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 80px;
        align-items: flex-start;
    }
    
    .environment__image {
        height: 300px;
        margin-top: 0;
    }
    
    .environment__header-item h4 {
        font-size: 1.375rem;
    }
}

@media (min-width: 1024px) {
    .environment__logo {
        width: 420px;
        max-width: 420px;
    }
}

/* ================================
   フッター
================================ */
.footer {
    padding-top: 100px;
}

.footer__image {
    width: 100%;
    height: auto;
}

@media (min-width: 768px) {
    .footer {
        padding-top: 160px;
    }
}

/* ================================
   レスポンシブ調整
================================ */
@media (max-width: 767px) {
    /* モバイル専用調整 */
    .features__grid,
    .environment__grid {
        gap: 24px;
    }
    
    .feature-card {
        min-height: auto;
    }
    
    .teamwork-card__image {
        height: 360px;
    }
}

@media (max-width: 1440px) and (min-width: 1024px) {
    .communication__text h4 {
        font-size: 1.125rem;
    }
    
    .communication__text p {
        font-size: 0.875rem;
    }
    
    .communication__content {
        padding: 60px 40px;
    }
}

@media (min-width: 1440px) {
    /* 大画面対応 */
    .container {
        max-width: 1200px;
    }
}