/* ============================================================
   核工业介绍页面专用样式 (industry.css)
   复用 style.css 的 CSS 变量
============================================================ */

/* ---------- Hero 区 ---------- */
.industry-hero {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #ffffff;
    overflow: hidden;
}

.industry-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.industry-hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.industry-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(11, 42, 107, 0.88), rgba(18, 60, 140, 0.72));
    z-index: 1;
}

.industry-hero-content {
    position: relative;
    z-index: 2;
    max-width: 760px;
    padding: 100px 40px;
}

.industry-hero h1 {
    font-size: 46px;
    font-weight: 700;
    margin-bottom: 18px;
    letter-spacing: 2px;
}

.industry-hero p {
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 36px;
    opacity: 0.92;
}

.industry-hero-btn {
    display: inline-block;
    background: #ffffff;
    color: var(--primary-color, #0b2a6b);
    font-size: 15px;
    font-weight: 600;
    padding: 13px 38px;
    border-radius: 30px;
    transition: background 0.3s ease, color 0.3s ease;
}

.industry-hero-btn:hover {
    background: var(--accent-color, #f5b800);
    color: #ffffff;
}

/* ---------- 通用标题区 ---------- */
.industry-section-head {
    text-align: center;
    margin-bottom: 50px;
}

.industry-section-head h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-main, #333333);
    margin-bottom: 12px;
}

.industry-section-head p {
    font-size: 15px;
    color: var(--text-sub, #666666);
}

.industry-section-head.light h2,
.industry-section-head.light p {
    color: #ffffff;
}

/* ---------- 核能现状分析 ---------- */
.industry-status {
    padding: 80px 8%;
    background: var(--bg-light, #f4f6fb);
}

.industry-status-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.industry-status-card {
    background: #ffffff;
    border-radius: var(--radius, 10px);
    padding: 36px 28px;
    box-shadow: var(--shadow, 0 6px 20px rgba(11, 42, 107, 0.08));
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.industry-status-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(11, 42, 107, 0.14);
}

.industry-status-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color, #0b2a6b);
    margin-bottom: 14px;
}

.industry-status-card p {
    font-size: 14px;
    color: var(--text-sub, #666666);
    line-height: 1.7;
}

/* ---------- 核安全优先 FAQ ---------- */
.industry-safety {
    padding: 80px 8%;
    background: linear-gradient(135deg, #0b1f4d 0%, #123c8c 100%);
    color: #ffffff;
}

.industry-faq-list {
    max-width: 860px;
    margin: 0 auto;
}

.industry-faq-item {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius, 10px);
    margin-bottom: 16px;
    overflow: hidden;
    transition: background 0.3s ease;
}

.industry-faq-item:hover {
    background: rgba(255, 255, 255, 0.12);
}

.industry-faq-item summary {
    padding: 22px 28px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.industry-faq-item summary::-webkit-details-marker {
    display: none;
}

.industry-faq-item summary::after {
    content: "+";
    font-size: 24px;
    font-weight: 300;
    transition: transform 0.3s ease;
    margin-left: 12px;
}

.industry-faq-item[open] summary::after {
    transform: rotate(45deg);
}

.industry-faq-item p {
    padding: 0 28px 24px;
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
}

/* ---------- 创新驱动发展 ---------- */
.industry-innovation {
    padding: 80px 8%;
    background: var(--bg-light, #f4f6fb);
}

.industry-innovation-list {
    display: flex;
    flex-direction: column;
    gap: 42px;
}

.industry-innovation-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    align-items: center;
    background: #ffffff;
    border-radius: var(--radius, 10px);
    overflow: hidden;
    box-shadow: var(--shadow, 0 6px 20px rgba(11, 42, 107, 0.08));
}

/* 偶数项图片在右、文字在左（通过 direction 切换） */
.industry-innovation-item:nth-child(even) {
    direction: rtl;
}

.industry-innovation-item:nth-child(even) > * {
    direction: ltr;
}

.industry-innovation-item .innovation-img {
    height: 300px;
    overflow: hidden;
}

.industry-innovation-item .innovation-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.industry-innovation-item:hover .innovation-img img {
    transform: scale(1.05);
}

.industry-innovation-item .innovation-text {
    padding: 40px 48px;
}

.industry-innovation-item h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-main, #333333);
    margin-bottom: 14px;
}

.industry-innovation-item p {
    font-size: 15px;
    color: var(--text-sub, #666666);
    line-height: 1.8;
}

/* ---------- 滚动渐入动画 ---------- */
.industry-reveal {
    opacity: 0;
}

.industry-reveal.industry-reveal-visible {
    animation: industryRevealUp 0.65s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
    animation-delay: var(--delay, 0s);
}

@keyframes industryRevealUp {
    from {
        opacity: 0;
        transform: translateY(26px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .industry-reveal {
        opacity: 1;
    }

    .industry-reveal.industry-reveal-visible {
        animation: none;
    }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
    .industry-status-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .industry-hero h1 {
        font-size: 30px;
    }

    .industry-hero-content {
        padding: 80px 24px;
    }

    .industry-status,
    .industry-safety,
    .industry-innovation {
        padding: 60px 6%;
    }

    .industry-status-grid,
    .industry-innovation-item {
        grid-template-columns: 1fr;
    }

    .industry-innovation-item:nth-child(even) {
        direction: ltr;
    }

    .industry-innovation-item .innovation-img {
        height: 220px;
    }

    .industry-innovation-item .innovation-text {
        padding: 28px 26px;
    }
}