/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a1a1a;
    --secondary-color: #333;
    --accent-color: #007bff;
    --text-color: #ffffff;
    --container-width: 1200px;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--primary-color);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
.section-title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero__bg-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    z-index: -1;
    object-fit: cover;
}

.hero__content {
    max-width: 800px;
    padding: 3rem;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 8px;
}

.hero__logo {
    width: 120px;
    height: 120px;
    margin-bottom: 2rem;
}

.hero__title {
    font-size: 4rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

.hero__subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero__cta {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn--primary {
    background-color: #4285f4;
    color: white;
}

.btn--primary:hover {
    background-color: #3367d6;
}

.btn--secondary {
    border: 2px solid #4285f4;
    color: white;
}

.btn--secondary:hover {
    background-color: rgba(66, 133, 244, 0.1);
}

/* Sections */
section {
    padding: 5rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }

    .hero__content {
        padding: 2rem;
        margin: 0 1rem;
    }

    .hero__title {
        font-size: 2.5rem;
    }

    .hero__logo {
        width: 80px;
        height: 80px;
    }

    .hero__subtitle {
        font-size: 1.2rem;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        margin: 0.5rem;
    }
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(0, 0, 0, 0.8);
    padding: 1rem 0;
}

.header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header__logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
}

.header__logo {
    width: 40px;
    height: 40px;
    margin-right: 1rem;
}

.header__title {
    font-size: 1.5rem;
    font-weight: bold;
}

/* Overview Section */
.overview {
    padding: 5rem 0;
    background-color: var(--secondary-color);
}

.overview__content {
    display: flex;
    gap: 4rem;
    align-items: center;
}

.overview__text {
    flex: 1;
}

.overview__description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.overview__list {
    list-style: none;
}

.overview__list li {
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
}

.overview__list li::before {
    content: "•";
    color: var(--accent-color);
    position: absolute;
    left: 0;
    font-size: 1.5rem;
}

.overview__image {
    flex: 1;
}

.overview__image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* Features Section */
.features {
    padding: 5rem 0;
    background-color: var(--secondary-color);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

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

.feature-card__image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

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

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

.feature-card__title {
    padding: 1.5rem 1.5rem 0.5rem;
    font-size: 1.5rem;
    color: var(--text-color);
}

.feature-card__text {
    padding: 0 1.5rem 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .features__grid {
        grid-template-columns: 1fr;
    }
}

/* 移动端优化调整 */
@media (max-width: 768px) {
    /* Hero Section 调整 */
    .hero__content {
        width: 90%;
        padding: 2rem;
    }

    .hero__title {
        font-size: 2.5rem;
        margin-bottom: 0.5rem;
    }

    .hero__subtitle {
        font-size: 1.2rem;
        margin-bottom: 1.5rem;
    }

    .hero__cta {
        flex-direction: column;
        gap: 1rem;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    /* Overview Section 调整 */
    .overview__content {
        flex-direction: column;
        gap: 2rem;
        padding: 0 1rem;
    }

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

    .overview__video iframe {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
    }

    .overview__description {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .overview__list {
        margin-bottom: 2rem;
    }

    /* Features Section 调整 */
    .features__grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 1rem;
    }

    .feature-card {
        margin-bottom: 1rem;
    }

    .feature-card__image {
        height: 180px;
    }

    .feature-card__title {
        font-size: 1.3rem;
        padding: 1rem 1rem 0.5rem;
    }

    .feature-card__text {
        font-size: 0.9rem;
        padding: 0 1rem 1rem;
    }

    /* 通用样式调整 */
    .section-title {
        font-size: 2rem;
        margin-bottom: 1.5rem;
        padding: 0 1rem;
    }

    .container {
        padding: 0;
    }
}

/* 小屏幕手机优化 */
@media (max-width: 375px) {
    .hero__title {
        font-size: 2rem;
    }

    .hero__subtitle {
        font-size: 1rem;
    }
}

/* Gameplay Section */
.gameplay {
    background-color: var(--primary-color);
    padding: 5rem 0;
}

.gameplay__content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.gameplay__video {
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.screenshots__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.screenshot {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

.screenshot:hover img {
    transform: scale(1.05);
}

/* 移动端响应式设计 */
@media (max-width: 768px) {
    .gameplay__video iframe {
        height: 250px;
    }

    .screenshots__grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

}

/* System Requirements Section */
.requirements {
    background-color: var(--primary-color);
    padding: 5rem 0;
}

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

.requirements__box {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 2rem;
}

.requirements__title {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 2rem;
    text-align: center;
}

.requirements__grid {
    display: grid;
    gap: 1.5rem;
}

.requirement {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 1rem;
    align-items: center;
}

.requirement__label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    font-weight: bold;
}

.requirement__value {
    color: var(--text-color);
}

/* 移动端响应式设计 */
@media (max-width: 768px) {
    .requirements__content {
        grid-template-columns: 1fr;
        padding: 0 1rem;
    }

    .requirements__box {
        padding: 1.5rem;
    }

    .requirement {
        grid-template-columns: 100px 1fr;
        gap: 0.5rem;
    }

    .requirement__label {
        font-size: 0.8rem;
    }

    .requirement__value {
        font-size: 0.9rem;
    }
}

/* SEO Content Section */
.seo-content {
    background-color: var(--secondary-color);
    padding: 5rem 0;
    color: var(--text-color);
}

.seo-content__grid {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.seo-article h2 {
    font-size: 1.8rem;
    color: var(--accent-color);
    margin: 2rem 0 1rem;
}

.seo-article h3 {
    font-size: 1.4rem;
    color: var(--text-color);
    margin: 1.5rem 0 1rem;
}

.seo-article h4 {
    font-size: 1.2rem;
    color: var(--text-color);
    margin: 1rem 0;
}

.seo-article p {
    line-height: 1.8;
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.8);
}

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

.seo-article li {
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
}

.quick-facts {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: 8px;
}

.quick-facts h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.quick-facts ul {
    list-style: none;
}

.quick-facts li {
    margin-bottom: 0.8rem;
    color: rgba(255, 255, 255, 0.8);
}

/* 移动端响应式设计 */
@media (max-width: 768px) {
    .seo-content__grid {
        grid-template-columns: 1fr;
    }

    .seo-article h2 {
        font-size: 1.6rem;
    }

    .seo-article h3 {
        font-size: 1.3rem;
    }
}