:root {
    --color-primary: #FF69B4;    /* 粉色主色调 */
    --color-dark: #1A1A1A;       /* 深色背景 */
    --color-white: #ffffff;
    --header-height: 80px;
}

.header {
    background-color: var(--color-dark);
    height: var(--header-height);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header__brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header__logo {
    height: 40px;
    width: auto;
    border-radius: 8px;
}

.header__title {
    color: var(--color-white);
    font-size: 1.5rem;
    font-weight: 600;
}

.header__cta {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.header__cta:hover {
    background-color: transparent;
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header__container {
        padding: 0 1rem;
    }

    .header__title {
        font-size: 1.2rem;
    }

    .header__cta {
        padding: 0.5rem 1rem;
    }
}
.video {
    padding: 4rem 0;
    background-color: var(--color-dark);
}

.video__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.video__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.video__item {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 宽高比 */
    height: 0;
}

.video__frame {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .video__grid {
        grid-template-columns: 1fr; /* 手机端单列显示 */
    }

    .video {
        padding: 2rem 0;
    }

    .video__container {
        padding: 0 1rem;
    }
}

.features {
    padding: 6rem 0;
    background-color: var(--color-dark);
}

.features__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.features__title {
    text-align: center;
    color: var(--color-white);
    font-size: 2.5rem;
    margin-bottom: 4rem;
}

.features__grid {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.feature-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 2rem;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card__image {
    overflow: hidden;
    border-radius: 12px;
}

.feature-card__image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-card__image img {
    transform: scale(1.05);
}

.feature-card__content {
    color: var(--color-white);
}

.feature-card__content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.feature-card__content p {
    font-size: 1.1rem;
    line-height: 1.6;
    opacity: 0.9;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .feature-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .features {
        padding: 3rem 0;
    }

    .features__title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .features__grid {
        gap: 2rem;
    }
}

.hero {
    min-height: 100vh;
    padding: 120px 0 60px;
    background: linear-gradient(to bottom, var(--color-dark) 60%, rgba(255, 105, 180, 0.1));
    position: relative;
    overflow: hidden;
}

.hero__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero__content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero__subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    line-height: 1.6;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero__video-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto 2.5rem;
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.hero__video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__steam-widget {
    width: 100%;
    max-width: 646px;
    margin: 0 auto;
}

.hero__steam-widget iframe {
    width: 100%;
    height: 190px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* 响应式设计 */
@media (max-width: 968px) {
    .hero {
        padding: 100px 0 40px;
    }

    .hero__title {
        font-size: 2.5rem;
    }

    .hero__subtitle {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }

    .hero__video-container {
        margin-bottom: 2rem;
    }
}

@media (max-width: 480px) {
    .hero__steam-widget iframe {
        height: 160px;
    }
}

.content {
    padding: 6rem 0;
    background-color: var(--color-white);
}

.content__container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

.content__main {
    color: var(--color-dark);
}

.content__title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--color-primary);
}

.content__section {
    margin-bottom: 4rem;
}

.content__section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--color-dark);
}

.content__section h3 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    color: var(--color-primary);
}

.content__section h4 {
    font-size: 1.25rem;
    margin: 1.5rem 0 0.75rem;
    color: var(--color-dark);
}

.content__section p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.content__section ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.content__section li {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .content {
        padding: 3rem 0;
    }

    .content__title {
        font-size: 2rem;
    }

    .content__section h2 {
        font-size: 1.75rem;
    }

    .content__section h3 {
        font-size: 1.35rem;
    }

    .content__section h4 {
        font-size: 1.15rem;
    }
}