* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto;
}

body {
    background: #000;
    color: #fff;
}

/* ========== 顶部悬浮栏 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
}

.logo {
    font-size: 18px;
    font-weight: bold;
}

.nav-buttons {
    display: flex;
    gap: 12px;
}

.nav-buttons a {
    padding: 8px 14px;
    font-size: 14px;
    color: #fff;
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 20px;
    transition: 0.3s;
}

.nav-buttons a.primary {
    background: #00c2ff;
    color: #000;
    border: none;
    font-weight: 600;
}

.nav-buttons a:hover {
    opacity: 0.8;
}

/* ========== 视频区域 ========== */
.video-section {
    position: relative;
    width: 100%;
    height: 100vh;
    margin-top: 60px;
    overflow: hidden;
}

.video-section video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 视频遮罩（提升文字可读性） */
.video-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
            to bottom,
            rgba(0,0,0,0.5),
            rgba(0,0,0,0.2),
            rgba(0,0,0,0.6)
    );
}

/* ========== 视频上的文字内容 ========== */
.video-text {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    max-width: 90%;
    z-index: 2;
}

.video-text h1 {
    font-size: 40px;
    margin-bottom: 30px;

}

.video-text h2 {
    font-size: 20px;
    font-weight: 400;
    margin-bottom: 10px;
    color: #ddd;
}

.video-text .tags {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.video-text .tag {
    padding: 6px 14px;
    border-radius: 16px;
    font-size: 13px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
}

/* 下方内容示例 */
.content {
    padding: 50px 20px;
    background: #111;
}

.content h3 {
    font-size: 26px;
    margin-bottom: 16px;
}

.content p {
    color: #ccc;
    line-height: 1.8;
}
.stock-section {
    max-width: 1200px;
    margin: 50px auto;
}
.stock-section h3{
    text-align: center;
    font-size: 50px;
}

.section-desc {
    text-align: center;
    font-size: 14px;
    color: #aaa;
    margin-bottom: 28px;
}
.spanck{
    color: red;
}

.stock-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

.stock-card {
    background: linear-gradient(180deg, #1a1a1a, #141414);
    border-radius: 14px;
    padding: 18px;
    border: 1px solid rgba(255,255,255,0.08);
}

.stock-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.stock-name {
    font-size: 15px;
    font-weight: 600;
}

.stock-code {
    font-size: 12px;
    color: #888;
}

.stock-label {
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 12px;
    background: rgba(255,255,255,0.12);
    color: #ddd;
}

.stock-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.metric span {
    display: block;
    font-size: 12px;
    color: #888;
    margin-bottom: 4px;
}

.metric strong {
    font-size: 13px;
    font-weight: 500;
}
.analysis-section {
    max-width: 1200px;
    margin: 10px auto;
    text-align: center;
}
.analysis-section h3{
    font-size: 50px;
}

.analysis-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.analysis-item {
    background: #1a1a1a;
    border-radius: 14px;
    padding: 24px 18px;
    border: 1px solid rgba(255,255,255,0.08);
}

.analysis-item h4 {
    font-size: 16px;
    margin-bottom: 10px;
}

.analysis-item p {
    font-size: 13px;
    color: #aaa;
    line-height: 1.6;
}
.user-section {
    max-width: 900px;
    margin: 80px auto;
    text-align: center;
}

.user-list {
    list-style: none;
    margin-top: 30px;
}

.user-list li {
    font-size: 14px;
    color: #ccc;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.ad-info-section {
    padding: 60px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto;
}

.ad-info-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 30px;
    color: #fff;
    text-align: center;
}

.ad-info-card {
    background: #fff;
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.ad-info-col h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #111;
}

.ad-info-col p {
    font-size: 14px;
    line-height: 1.7;
    color: #444;
    margin-bottom: 8px;
}

.ad-info-col ul {
    padding-left: 18px;
}

.ad-info-col li {
    font-size: 14px;
    line-height: 1.7;
    color: #444;
    margin-bottom: 6px;
}
/* ====== Footer ====== */
.site-footer {
    background: #0b0b0b;
    color: #ccc;
    padding: 50px 20px 20px;
    font-size: 14px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 12px;
    font-weight: 600;
}

.footer-col p {
    line-height: 1.7;
    color: #bbb;
}

.footer-col a {
    color: #4da6ff;
    text-decoration: none;
}

.footer-col a:hover {
    text-decoration: underline;
}

.footer-links {
    margin-top: 8px;
}

.footer-bottom {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 13px;
    color: #777;
}




/* 响应式 */
@media (max-width: 1024px) {
    .stock-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .analysis-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .ad-info-card {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stock-grid {
        grid-template-columns: 1fr;
    }
    .analysis-grid {
        grid-template-columns: 1fr;
    }
}

/* 移动端优化 */
@media (max-width: 768px) {
    .video-text h1 {
        font-size: 26px;
    }
    .video-text h2 {
        font-size: 16px;
    }
    .footer-container {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}
@media (max-width: 640px) {
    .ad-info-card {
        grid-template-columns: 1fr;
        padding: 25px;
    }

    .ad-info-title {
        font-size: 28px;
    }
}