/* =========================================================
   霓凰映画 · 首页样式 (index.css)
   全屏视频背景 + 左侧文案 + 右侧装饰 + 底部备案
   ========================================================= */

/* 首页覆盖：纯黑底、禁止滚动保持全屏感 */
body {
    background-color: #000;
    overflow: hidden;
    height: 100vh; /* 显式占满视口，作为 absolute 子元素的定位基准，避免整页上移错乱 */
}

/* 首页视频背景压暗（区别于子页） */
.bg-video {
    filter: brightness(0.7); /* 压暗背景以突出文字 */
}

/* --- 主体文案 (左侧定位) --- */
.hero-content {
    position: absolute;
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    max-width: 600px;
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}
.hero-tag {
    font-size: 14px;
    color: #d4af37;
    letter-spacing: 6px;
    text-transform: uppercase;
    margin-bottom: 20px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.5s;
}
.hero-title {
    font-size: clamp(36px, 5vw, 72px);
    font-weight: 300;
    line-height: 1.2;
    margin-bottom: 25px;
    max-width: 700px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.8s;
}
.hero-title span {
    font-weight: bold;
    background: linear-gradient(135deg, #d4af37, #f5e6a3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    max-width: 500px;
    margin-bottom: 50px;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 1.1s;
}

h1 {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 20px;
    font-weight: 500;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}
h1 .highlight {
    color: #d4af37;
}

p.subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    letter-spacing: 1px;
}

.cta-btn {
    display: inline-block;
    padding: 12px 36px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.6);
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-size: 16px;
    transition: all 0.3s;
}
.cta-btn:hover {
    background: #d4af37;
    border-color: #d4af37;
    color: #000;
}

/* --- 右侧装饰元素 --- */
.side-social {
    position: absolute;
    right: 40px;
    bottom: 100px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
}
.icon-box {
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: 0.3s;
}
.icon-box:hover {
    border-color: #d4af37;
    color: #d4af37;
}

/* --- 移动端适配 --- */
@media (max-width: 768px) {
    header { padding: 20px 25px; }
    nav { display: none; }
    .hero-content {
        padding-left: 25px;
        padding-right: 25px;
        justify-content: flex-end;
        padding-bottom: 140px;
    }
    .hero-title { font-size: 32px; }
}