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

html, body {
    width: 100%;
    min-height: 100vh;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: #0b0b0b;
    color: #f0f0f0;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ---- 头部 ---- */

.header {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2.4rem 0 0.8rem;
}

.logo {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-decoration: none;
    color: #888;
    transition: color 0.25s ease;
}

.logo:hover {
    color: #fff;
}

/* ---- 主体 ---- */

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}

/* 标题区域 */

.intro {
    text-align: center;
    margin-bottom: 3rem;
}

.title {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 700;
    letter-spacing: 0.04em;
    background: linear-gradient(135deg, #f0f0f0 0%, #a0a0a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.desc {
    margin-top: 0.6rem;
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    font-weight: 400;
    letter-spacing: 0.06em;
    color: #777;
}

/* ---- 视频播放器 ---- */

.player-section {
    width: 100%;
    display: flex;
    justify-content: center;
}

.player-container {
    width: 100%;
    max-width: 880px;
}

.player-frame {
    position: relative;
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    background: #111;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.7),
        0 0 0 1px rgba(255, 255, 255, 0.05);
}

.main-video {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background: #111;
    vertical-align: middle;
}

/* 视频控件微调 */

.main-video::-webkit-media-controls {
    opacity: 0.7;
}

.main-video::-webkit-media-controls-panel {
    background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, transparent 60%);
    border-radius: 0;
}

/* ---- 底部 ---- */

.footer {
    text-align: center;
    padding: 2rem 0 2.4rem;
}

.footer span {
    font-size: 0.7rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    color: #444;
}

/* ---- 响应式 ---- */

@media (max-width: 768px) {
    .page {
        padding: 0 1.2rem;
    }

    .header {
        padding-top: 1.6rem;
    }

    .logo {
        font-size: 0.95rem;
    }

    .intro {
        margin-bottom: 2rem;
    }

    .player-frame {
        border-radius: 14px;
    }
}

@media (max-width: 480px) {
    .page {
        padding: 0 1rem;
    }

    .header {
        padding-top: 1.2rem;
    }

    .intro {
        margin-bottom: 1.4rem;
    }

    .title {
        font-size: 1.8rem;
    }

    .desc {
        font-size: 0.8rem;
    }

    .player-frame {
        border-radius: 10px;
        box-shadow:
            0 12px 40px rgba(0, 0, 0, 0.6),
            0 0 0 1px rgba(255, 255, 255, 0.04);
    }
}

@media (min-width: 1400px) {
    .page {
        max-width: 1200px;
        padding: 0 3rem;
    }

    .player-container {
        max-width: 960px;
    }

    .player-frame {
        border-radius: 24px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .logo {
        transition: none;
    }

    .title {
        transition: none;
    }
}