/* AI全链路赋能页面 - 按设计稿 1:1 */
.page-business-ai {
    font-family: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
    color: #333;
    background: #fff;
    margin: 0;
    padding: 0;
}

/* 当前页导航高亮：业务发展子菜单中的 AI全链路赋能 */
.page-business-ai .nav-active > a {
    color: #fff;
}
.page-business-ai .nav-list > li.nav-active::after {
    width: 100%;
    background: #fff;
}
.page-business-ai .submenu .nav-active > a {
    color: #b8d477;
}

/* 头部：默认半透明深色，悬停浅蓝毛玻璃 */
.page-business-ai .site-header {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: none;
    transition: background 0.3s ease, backdrop-filter 0.3s ease;
}
.page-business-ai .site-header:hover {
    background: rgba(191, 202, 215, 0.8);
    backdrop-filter: blur(10px);
}

/* 菜单字号放大 */
.page-business-ai .site-header .nav-list > li > a {
    font-size: 16px;
}

/* ========== Banner：aifnbg.jpg + 左侧绿色遮罩 + 白色文案 ========== */
.ai-hero {
    position: relative;
    width: 100%;
    min-height: 100vh;
    margin-top: -60px;
    overflow: hidden;
}

.ai-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
}

/* 左侧浅绿渐变遮罩已移除 */
.ai-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    z-index: 1;
}

.ai-hero-inner {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    min-height: 100vh;
    box-sizing: border-box;
}

.ai-hero-text {
    font-size: clamp(36px, 5vw, 52px);
    font-weight: 700;
    color: #fff;
    margin: 0;
    letter-spacing: 0.02em;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

/* ========== 子导航：白底，与主内容左对齐 ========== */
.ai-tabs-bar {
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
}

.ai-tabs-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 48px;
}

.ai-tab-item {
    position: relative;
    padding: 20px 8px 18px;
    font-size: 16px;
    font-weight: 500;
    color: #374151;
    text-decoration: none;
    transition: color 0.2s;
}

.ai-tab-item:hover {
    color: #b8d477;
}

.ai-tab-item.active {
    color: #374151;
}

.ai-tab-item.active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 3px;
    background: #b8d477;
}

/* ========== 主内容区容器 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 三个内容板块：图文左右交替，大圆图 + 图标+标题+描述 ========== */
.ai-section {
    padding: 80px 0;
    background: #fff;
}

.ai-section:nth-child(even) {
    background: #fff;
}

.ai-section-content {
    display: flex;
    align-items: center;
    gap: 56px;
}

.ai-section-reverse {
    flex-direction: row-reverse;
}

.ai-section-reverse .ai-section-text {
    text-align: left;
}

/* 圆形图片 + 柔和阴影 */
.ai-section-image {
    flex: 0 0 42%;
    max-width: 480px;
    min-width: 0;
    overflow: hidden;
    border-radius: 50%;
    background: transparent;
}

.ai-section-image img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 50%;
    display: block;
    box-shadow: none;
    background: transparent;
}

.ai-section-text {
    flex: 1;
    min-width: 0;
}

.ai-section-heading {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 20px;
}

.ai-section-icon {
    width: 48px;
    height: 48px;
    object-fit: contain;
    flex-shrink: 0;
}

.ai-section-title {
    font-size: 26px;
    font-weight: 700;
    color: #374151;
    margin: 0;
    line-height: 1.35;
    text-align: left;
}

.ai-section-desc {
    font-size: 16px;
    line-height: 1.7;
    color: #6b7280;
    margin: 0;
}

/* ========== 页脚（与智慧健康页一致） ========== */
.page-business-ai .site-footer {
    background: #b8d477;
    padding: 0 0 48px;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.page-business-ai .site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    min-height: 80px;
    background: url('../images/footbg.png') no-repeat center top;
    background-size: 100% auto;
    z-index: 1;
}

.page-business-ai .footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px 0;
    position: relative;
    z-index: 2;
}

.page-business-ai .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 40px;
}

.page-business-ai .footer-section {
    color: #fff;
}

.page-business-ai .footer-left {
    flex: 0 1 auto;
    min-width: 280px;
    text-align: left;
}

.page-business-ai .footer-brand {
    margin-bottom: 24px;
}

.page-business-ai .footer-logo-img {
    max-height: 48px;
    width: auto;
    display: block;
    margin-bottom: 8px;
}

.page-business-ai .footer-brand-en {
    font-size: 11px;
    color: #fff;
    opacity: 0.95;
    letter-spacing: 0.02em;
}

.page-business-ai .footer-contact {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.page-business-ai .contact-block {
    margin-bottom: 20px;
}

.page-business-ai .contact-block:last-child {
    margin-bottom: 0;
}

.page-business-ai .contact-block-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.page-business-ai .footer-contact .contact-icon {
    width: 18px;
    height: 18px;
    object-fit: contain;
    flex-shrink: 0;
    filter: brightness(0) invert(1);
}

.page-business-ai .contact-block-title {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
}

.page-business-ai .contact-block-detail {
    font-size: 14px;
    line-height: 1.4;
    color: #fff;
    margin: 0;
    padding-left: 26px;
}

.page-business-ai .footer-legal {
    flex: 1;
    max-width: 560px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    text-align: right;
}

/* 页脚右侧文字统一字号 - 确保所有文字完全一致 */
.page-business-ai .footer-legal p,
.page-business-ai .footer-legal .copyright,
.page-business-ai .footer-legal .license {
    font-size: 14px !important;
    font-weight: 400 !important;
    line-height: 1.25 !important;
    color: #fff !important;
    margin: 2px 0 !important;
}

/* ========== 响应式：平板 ========== */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }

    .ai-hero {
        min-height: 88vh;
    }

    .ai-hero-inner {
        min-height: 88vh;
        padding: 0 20px;
    }

    .ai-tabs-inner {
        padding: 0 20px;
        gap: 36px;
    }

    .ai-tab-item {
        font-size: 15px;
    }

    .ai-section {
        padding: 60px 0;
    }

    .ai-section-content {
        gap: 40px;
    }

    .ai-section-image {
        flex: 0 0 38%;
    }

    .ai-section-title {
        font-size: 22px;
    }

    .ai-section-desc {
        font-size: 15px;
    }

    .ai-section-icon {
        width: 42px;
        height: 42px;
    }
}

/* ========== 响应式：移动端 ========== */
@media (max-width: 768px) {
    .ai-hero {
        min-height: 85vh;
    }

    .ai-hero-inner {
        min-height: 85vh;
        padding: 0 16px;
    }

    .ai-hero-text {
        font-size: 28px;
    }

    .ai-tabs-inner {
        padding: 0 16px;
        gap: 24px;
        flex-wrap: wrap;
    }

    .ai-tab-item {
        padding: 16px 4px 14px;
        font-size: 14px;
    }

    .ai-tab-item.active::after {
        width: 100%;
    }

    .ai-section {
        padding: 48px 0;
    }

    .ai-section-content,
    .ai-section-reverse {
        flex-direction: column;
        gap: 28px;
    }

    .ai-section-image {
        flex: 1;
        max-width: 320px;
        width: 100%;
        margin: 0 auto;
    }

    .ai-section-text {
        text-align: left;
    }

    .ai-section-heading {
        flex-direction: column;
        align-items: flex-start;
        margin-bottom: 16px;
    }

    .ai-section-title {
        font-size: 20px;
    }

    .ai-section-desc {
        font-size: 14px;
    }

    .ai-section-icon {
        width: 40px;
        height: 40px;
    }

    .page-business-ai .footer-container {
        padding: 36px 16px 0;
    }

    .page-business-ai .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 28px;
    }

    .page-business-ai .footer-legal {
        align-items: flex-start;
        text-align: left;
        max-width: 100%;
    }

    .page-business-ai .footer-legal .copyright,
    .page-business-ai .footer-legal .license {
        font-size: 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .page-business-ai .site-header,
    .ai-tab-item {
        transition-duration: 0.01ms;
    }
}