/* ============================================
   首页专属样式
   公共头尾见 common.css
   ============================================ */

/* ============================================
   1. Hero
   ============================================ */
.hero {
    position: relative;
    width: 100%;
    height: 620px;
    overflow: hidden;
}

.hero-slides {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero-slide {
    position: absolute;
    inset: 0;
    background: center/cover no-repeat;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.hero-slide.is-active {
    opacity: 1;
}

.hero-slide-content {
    position: absolute;
    inset: 0;
    z-index: 3;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-side);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 80px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.hero-slide.is-active .hero-slide-content {
    opacity: 1;
    transform: translateY(0);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 2;
}

.hero-title {
    font-size: 60px;
    font-weight: 600;
    color: var(--color-white);
    line-height: 1.03;
    margin-bottom: 14px;
}

.hero-subtitle {
    font-size: 30px;
    font-weight: 600;
    color: var(--color-white);
    line-height: 1.4;
}

/* ============================================
   2. 业务布局（左右排列）
   ============================================ */
.business-layout {
    max-width: var(--container-max);
    margin: 40px auto 0;
    padding: 0 var(--container-side);
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    align-items: flex-start;
}

@media (max-width: 992px) {
    .business-layout {
        flex-direction: column;
        gap: 30px;
    }
    .core-business,
    .about {
        width: 100%;
    }
}

/* ============================================
   3. 核心业务
   ============================================ */
.core-business {
    flex: 1;
    margin: 0;
    padding: 0;
}

.section-head {
    position: relative;
    margin-bottom: 30px;
    text-align: center;
}

.section-title {
    font-size: 28px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.2;
    position: relative;
    display: inline-block;
}

.section-title-center {
    display: block;
    text-align: center;
    padding-left: 0;
}

.section-bar {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -22px;
    width: 33px;
    height: 4px;
    background: var(--color-brand-gold);
}

.section-sub {
    font-size: 16px;
    color: var(--color-text);
    margin-top: 12px;
}

.section-lead {
    font-size: 16px;
    color: var(--color-text);
    text-align: center;
    max-width: 641px;
    margin: 14px auto 0;
    line-height: 2.5;
}

.section-head-light {
    padding-left: 0;
    margin-left: var(--section-side);
}

.section-head-light .section-title {
    color: var(--color-white);
}

.section-head-light .section-sub {
    color: var(--color-white);
    display: inline-block;
    margin-left: 28px;
}

.section-head-light .section-bar {
    display: none;
}

.core-cards {
    display: grid;
    grid-template-columns: repeat(4, 214px);
    gap: 24px;
    justify-content: center;
    margin-top: 50px;
}

.core-card {
    background: var(--color-white);
    border-radius: var(--radius-card);
    padding: 60px 20px 73px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.core-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.core-card-icon {
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.core-card-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.core-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
    line-height: 1.4;
}

.core-card-desc {
    font-size: 14px;
    color: var(--color-text-soft);
    text-align: center;
    line-height: 1.5;
    max-width: 174px;
}

/* ============================================
   4. 公司简介
   ============================================ */
.about {
    flex: 1;
    margin: 0;
    padding: 0;
}

.about-inner {
    position: relative;
    height: 310px;
    /* min-width: 700px; */
    border-radius: var(--radius-card);
    overflow: hidden;
    margin-top: 82px;
    background-image: url(../images/about-bg.jpg);
    background-size: cover;
    background-position: center;
}

.about-image {
    position: absolute;
    top: 0;
    right: 0;
    width: 820px;
    height: 100%;
    z-index: 1;
}

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

.about-card {
    position: relative;
    z-index: 2;
    width: 100%;
    min-height: 100%;
    padding: 30px 89px 30px 24px;
    border-radius: var(--radius-card);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 14px;
}

.about-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.27;
}

.about-lead {
    font-size: 16px;
    color: var(--color-text);
    line-height: 1.75;
    flex-shrink: 0;
}

.about-body {
    flex-shrink: 0;
}

.about-body p {
    font-size: 16px;
    color: var(--color-text);
    line-height: 1.75;
    flex-shrink: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 110px;
    height: 38px;
    border-radius: var(--radius-btn);
    font-size: 16px;
    color: var(--color-white);
    transition: opacity 0.2s, transform 0.2s;
}

.btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

.btn-gold {
    background: var(--color-brand-gold);
    position: absolute;
    bottom: 0;
    left: 0;
}

/* ============================================
   5. 主要业务(深蓝)
   ============================================ */
.business {
    margin-top: 70px;
    background: var(--color-deep-navy);
    padding: 40px 0 70px;
}

.biz-cards {
    max-width: 1874px;
    width: 92%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 50px;
}

.biz-card {
    background: var(--color-white);
    border-radius: var(--radius-card);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s, box-shadow 0.2s;
}

.biz-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.biz-card-image {
    position: relative;
    width: 100%;
    height: 169px;
    overflow: hidden;
}

.biz-card-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-overlay-light);
    pointer-events: none;
}

.biz-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.biz-card-body {
    padding: 26px 20px 30px;
    text-align: center;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.biz-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.biz-card-desc {
    font-size: 14px;
    color: var(--color-text-soft);
    line-height: 2;
}

.biz-card-link {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    height: 100%;
}

/* ============================================
   6. 自主研发产品
   ============================================ */
.products {
    margin: 90px auto 0;
    padding: 0 var(--container-side);
    max-width: 1920px;
}

.products .section-head {
    padding-left: 0;
    text-align: center;
    margin-bottom: 60px;
}

.products .section-title {
    display: block;
    text-align: center;
}

.product-cards {
    max-width: 1776px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.product-card-image {
    position: relative;
    width: 100%;
    height: 154px;
    border-radius: var(--radius-card);
    overflow: hidden;
    background: var(--color-placeholder);
}

.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-card-image .placeholder-svg {
    object-fit: cover;
    background: var(--color-placeholder);
}

.product-card-label {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 56px;
    background: var(--color-overlay-dark);
    color: var(--color-white);
    font-size: 16px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom-left-radius: var(--radius-card);
    border-bottom-right-radius: var(--radius-card);
}

.product-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

/* ============================================
   7. 统计数据
   ============================================ */
.stats {
    margin-top: 50px;
    background: var(--color-deep-navy);
    padding: 0 var(--container-side);
}

.stats-list {
    max-width: 1776px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    padding: 40px 0;
}

.stats-list .stat-item {
    flex: 1;
}

.stat-item {
    background: var(--color-card-navy);
    border-radius: var(--radius-card);
    height: 117px;
    display: flex;
    align-items: center;
    padding: 0 60px;
    gap: 20px;
}

.stat-icon {
    width: 46px;
    height: 38px;
    flex-shrink: 0;
}

.stat-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.stat-text {
    color: var(--color-white);
}

.stat-number {
    font-family: Arial, sans-serif;
    font-style: italic;
    font-weight: 700;
    font-size: 30px;
    line-height: 1.27;
}

.stat-label {
    font-size: 16px;
    line-height: 1.4;
    margin-top: 0;
}

/* ============================================
   8. 典型案例
   ============================================ */
.cases {
    background: var(--color-white);
    margin-top: 0;
    padding: 50px var(--container-side) 80px;
}

.cases .section-head {
    padding-left: 0;
    text-align: center;
    margin-bottom: 0;
}

.cases .section-title {
    display: block;
    text-align: center;
}

.case-tabs {
    max-width: 1776px;
    margin: 26px auto 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0;
}

.case-tab {
    font-size: 28px;
    color: var(--color-text);
    font-weight: 400;
    padding: 0 0 12px;
    position: relative;
    transition: color 0.2s;
}

.case-tab.is-active {
    color: var(--color-brand-gold);
    font-weight: 600;
}

.case-tab.is-active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -10px;
    height: 4px;
    background: var(--color-brand-gold);
}

.case-list {
    max-width: 1776px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 51px;
}

.case-card {
    display: flex;
    flex-direction: row;
}

.case-card-image {
    width: 100%;
    height: 263px;
    border-radius: var(--radius-card);
    overflow: hidden;
    margin-right: 34px;
}

.case-card-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.case-card-body {
    padding-top: 10px;
    position: relative;
}

.case-card-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 16px;
    line-height: 1.27;
}

.case-card-desc {
    font-size: 16px;
    color: var(--color-text);
    line-height: 1.75;
    margin-bottom: 20px;
}

.case-more {
    max-width: 1776px;
    margin: 30px auto 0;
    text-align: right;
}

.case-more-link {
    font-size: 22px;
    color: var(--color-text);
    transition: color 0.2s;
}

.case-more-link:hover {
    color: var(--color-brand-gold);
}

/* ============================================
   9. CTA
   ============================================ */
.cta {
    position: relative;
    height: 164px;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
    background: url('../images/cta-bg.jpg') center/cover no-repeat;
    z-index: 1;
}

.cta-overlay {
    position: absolute;
    inset: 0;
    background: var(--color-overlay-darker);
    z-index: 2;
}

.cta-content {
    position: relative;
    z-index: 3;
    max-width: 1776px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-white);
}

.cta-title {
    font-size: 40px;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 8px;
}

.cta-subtitle {
    font-size: 24px;
    font-weight: 400;
    line-height: 1.4;
}

/* ============================================
   响应式适配 - 首页专属
   ============================================ */

/* 大屏笔记本 (≤ 1440px) */
@media (max-width: 1440px) {
    .core-cards {
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }

    .core-card {
        padding: 50px 18px 60px;
    }

    .about-inner {
        height: auto;
    }

    .about-card {
        padding: 24px 60px 24px 20px;
    }
}

/* 平板 (≤ 1200px) */
@media (max-width: 1200px) {
    .core-cards {
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
    }

    .core-card {
        padding: 40px 16px 50px;
    }

    .core-card-title,
    .core-card-desc {
        max-width: 100%;
    }

    .biz-cards {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    .about-inner {
        height: auto;
    }

    .about-image {
        position: relative;
        width: 100%;
        height: 220px;
    }

    .about-card {
        width: 100%;
        padding: 30px 24px;
    }

    .product-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .case-list {
        gap: 30px;
    }

    .case-tabs {
        flex-wrap: wrap;
        gap: 12px 24px;
        justify-content: center;
    }

    .case-tab {
        font-size: 20px;
    }
}

/* 手机 (≤ 768px) */
@media (max-width: 768px) {
    .hero {
        height: 360px;
    }

    .hero-slide-content {
        padding-top: 60px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .core-business {
        margin-top: 60px;
    }

    .section-head {
        padding-left: 0;
        text-align: center;
        margin-bottom: 24px;
    }

    .section-head .section-title {
        display: block;
    }

    .section-bar {
        left: 50%;
        transform: translateX(-50%);
    }

    .core-cards {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .core-card {
        padding: 30px 12px 36px;
    }

    .about {
        margin-top: 24px;
    }

    .about-card {
        padding: 24px 20px;
    }

    .about-inner {
        margin-top: 0;
    }

    .about-title {
        font-size: 20px;
    }

    .business {
        margin-top: 40px;
        padding: 32px 0 40px;
    }

    .section-head-light {
        margin-left: 0;
        text-align: center;
    }

    .section-head-light .section-sub {
        display: block;
        margin-left: 0;
        margin-top: 8px;
    }

    .biz-cards {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .biz-card-body {
        padding: 18px 14px 22px;
    }

    .biz-card-title {
        font-size: 16px;
        min-height: auto;
    }

    .biz-card-desc {
        font-size: 13px;
        line-height: 1.7;
    }

    .products {
        margin-top: 50px;
        padding: 40px var(--container-side) 50px;
    }

    .products .section-head {
        margin-bottom: 30px;
    }

    .product-cards {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .product-card-image {
        height: 120px;
        border-radius: 8px;
    }

    .product-card-image img {
        border-radius: 8px;
    }

    .product-card-label {
        height: 40px;
        font-size: 12px;
        border-radius: 0 0 8px 8px;
    }

    .stats {
        margin-top: 30px;
        padding: 0 var(--container-side);
    }

    .stats-list {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
        padding: 24px 0;
    }

    .stat-item {
        height: auto;
        padding: 16px 12px;
        gap: 12px;
        border-radius: 8px;
    }

    .stat-icon {
        width: 36px;
        height: 30px;
    }

    .stat-number {
        font-size: 20px;
    }

    .stat-label {
        font-size: 12px;
    }

    .cases {
        padding: 40px var(--container-side) 50px;
    }

    .case-tabs {
        gap: 10px 20px;
        margin: 20px auto 30px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .case-tab {
        font-size: 13px;
        padding: 6px 12px;
        white-space: nowrap;
        flex: 0 0 auto;
        background: rgba(0, 0, 0, 0.03);
        border-radius: 4px;
        transition: all 0.2s;
    }

    .case-tab.is-active {
        background: var(--color-brand-gold);
        color: var(--color-white);
        padding: 2px 5px;
    }

    .case-tab.is-active::after {
        display: none;
    }

    .case-list {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .case-card {
        flex-direction: column;
    }

    .case-card-image {
        height: 180px;
        margin-right: 0;
        margin-bottom: 16px;
        border-radius: 8px;
    }

    .case-card-image img {
        border-radius: 8px;
    }

    .case-card-body {
        padding-top: 0;
        position: relative;
    }

    .case-card-body .btn-gold {
        position: relative;
        width: 100%;
        height: 36px;
        font-size: 14px;
        color: #fff;
        padding: 2px 5px;
        border-radius: 6px;
    }

    .case-card-title {
        font-size: 16px;
        margin-bottom: 10px;
    }

    .case-card-desc {
        font-size: 13px;
        margin-bottom: 14px;
        line-height: 1.6;
    }

    .case-more {
        text-align: center;
        margin-top: 24px;
    }

    .case-more-link {
        font-size: 14px;
    }

    .cta {
        height: 130px;
    }

    .cta-title {
        font-size: 22px;
    }

    .cta-subtitle {
        font-size: 14px;
    }
}

/* 超小屏 (≤ 480px) */
@media (max-width: 480px) {
    .hero {
        height: 220px;
    }

    .hero-slide-content {
        padding-top: 50px;
    }

    .hero-title {
        font-size: 26px;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .core-cards {
        grid-template-columns: 1fr;
    }

    .biz-cards {
        grid-template-columns: 1fr;
    }

    .product-cards {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .product-card-image {
        height: 100px;
    }

    .product-card-label {
        height: 36px;
        font-size: 12px;
    }

    .stats-list {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .stat-item {
        padding: 14px 12px;
    }

    .stat-icon {
        width: 32px;
        height: 26px;
    }

    .stat-number {
        font-size: 18px;
    }

    .stat-label {
        font-size: 12px;
    }

    .cases {
        padding: 30px var(--container-side) 40px;
    }

    .case-tabs {
        gap: 8px 12px;
    }

    .case-tab {
        font-size: 12px;
        padding: 5px 10px;
    }

    .case-list {
        gap: 20px;
    }

    .case-card-image {
        height: 160px;
        margin-bottom: 12px;
    }

    .case-card-body .btn-gold {
        height: 34px;
        font-size: 13px;
        color: #fff;
        padding: 2px 5px;
        border-radius: 6px;
    }

    .case-card-title {
        font-size: 15px;
        margin-bottom: 8px;
    }

    .case-card-desc {
        font-size: 12px;
        margin-bottom: 10px;
    }
}