:root {
    /* 主渐变背景 - 深蓝紫 */
    --bg-gradient-start: #0f172a;
    --bg-gradient-end: #1e1b4b;

    /* 强调色 - 橙红 */
    --accent-orange: #f97316;
    --accent-red: #dc2626;

    /* 辅助色 */
    --gold: #fbbf24;
    --cyan: #06b6d4;

    /* 卡片背景 - 毛玻璃效果 */
    --card-bg: rgba(255, 255, 255, 0.08);
    --card-border: rgba(255, 255, 255, 0.12);

    /* 文字颜色 */
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;

    /* 阴影 */
    --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 32px rgba(249, 115, 22, 0.2);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.7;
}

/* 头图区域 */
.hero {
    width: 100%;
    max-width: 1664px;
    height: 500px;
    margin: 0 auto;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(249, 115, 22, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(6, 182, 212, 0.06) 0%, transparent 50%);
    animation: heroGlow 15s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(5%, 2%); }
}

.hero img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    position: relative;
    z-index: 1;
}

/* 主内容区域 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

/* 摘要区域 */
.summary {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 40px;
    margin: -30px auto 40px;
    position: relative;
    z-index: 10;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-left: 4px solid var(--accent-orange);
}

.summary h1 {
    font-size: 28px;
    background: linear-gradient(90deg, var(--accent-orange), var(--accent-red));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    font-weight: 700;
}

.summary p {
    font-size: 16px;
    color: var(--text-primary);
    text-indent: 2em;
    line-height: 1.8;
}

/* 标题装饰 */
.section-title {
    text-align: center;
    margin-bottom: 32px;
    position: relative;
}

.section-title h2 {
    font-size: 24px;
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    padding: 0 20px;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
    position: relative;
    z-index: 1;
}

.section-title::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-orange), var(--accent-red), transparent);
}

.section-title .icon {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-red));
    transform: rotate(45deg);
    margin-right: 8px;
}

/* 新闻列表 */
.news-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding-bottom: 60px;
}

.news-card,
a.news-card {
    display: block;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.news-card:hover,
a.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent-orange);
}

.news-card .card-image {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.3);
}

.news-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-card:hover .card-image img {
    transform: scale(1.05);
}

.news-card .card-content {
    padding: 20px;
}

.news-card .card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card .card-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 底部 */
.footer {
    background: linear-gradient(180deg, #0a0a1a 0%, #0f172a 100%);
    color: var(--text-secondary);
    text-align: center;
    padding: 24px;
    font-size: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: var(--accent-orange);
}

/* 响应式 */
@media (max-width: 1199px) {
    .news-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 767px) {
    .hero {
        height: auto;
        background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    }

    .hero::before {
        display: none;
    }

    .hero img {
        width: 100%;
        height: auto;
    }

    .summary {
        padding: 24px;
        margin: -20px 16px 30px;
    }

    .summary h1 {
        font-size: 22px;
    }

    .summary p {
        font-size: 15px;
    }

    .news-list {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .section-title h2 {
        font-size: 20px;
    }
}