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

body {
    font-family: Arial, "Microsoft YaHei", sans-serif;
    background-color: #f4f6f8;
    color: #333;
}

.site-header {
    width: 100%;
    min-height: 60vh;

    background-image: url("picture/pic1.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    position: relative;
    overflow: hidden;
    text-align: center;
}

.site-header::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    z-index: 0;
}

.site-header h1,
.site-header p {
    position: relative;
    z-index: 1;
}

.site-header h1 {
    width: 100%;
    color: rgba(255, 255, 255, 0.45);
    font-size: clamp(56px, 12vw, 180px);
    font-weight: 800;
    letter-spacing: 0.04em;
    line-height: 0.9;
    white-space: nowrap;
}

.site-header p {
    margin-top: 18px;
    color: #ffb829;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 0.18em;
}
.video-section {
    width: 100%;
    padding: 80px 10%;
    background-color: #f4f6f8;
    text-align: center;
}

.video-section h2 {
    margin-bottom: 30px;
    font-size: 36px;
    color: #2c3e50;
}

.video-wrapper {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;

    aspect-ratio: 16 / 9;

    border-radius: 16px;
    overflow: hidden;

    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
}

.video-wrapper iframe {
    width: 100%;
    height: 100%;
    display: block;
}
.section-nav {
    width: 100%;
    background-color: #1f2a24;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 36px;
    padding: 18px 6%;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    border-bottom: 1px solid rgba(0, 0, 0, 0.25);
}

.section-nav a {
    color: #f3ead6;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 8px 4px;
    transition: color 0.2s ease, transform 0.2s ease;
}

.section-nav a:hover {
    color: #ffb829;
    transform: translateY(-2px);
}
@media (max-width: 760px) {
    .section-nav {
        flex-wrap: wrap;
        gap: 16px;
        padding: 14px 5%;
    }

    .section-nav a {
        font-size: 14px;
    }
}
.prologue-section {
    width: 100%;
    padding: 90px 10%;
    background-color: #10130f;
    color: #f3ead6;
}

.prologue-container {
    max-width: 980px;
    margin: 0 auto;
}

.prologue-container h2 {
    margin-bottom: 36px;
    color: #ffb829;
    font-size: 42px;
    font-weight: 800;
    letter-spacing: 0.06em;
}

.prologue-text {
    font-size: 18px;
    line-height: 1.9;
    letter-spacing: 0.01em;
}

.prologue-text p {
    margin-bottom: 24px;
}

.prologue-text p:first-child,
.prologue-text p:nth-child(2) {
    font-size: 24px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.88);
}

.prologue-text strong {
    color: #ffcf5a;
    font-weight: 800;
}
.back-to-top {
    position: fixed;
    right: 32px;
    bottom: 32px;
    z-index: 999;

    width: 52px;
    height: 52px;
    border: none;
    border-radius: 50%;

    background-color: #ffb829;
    color: #10130f;

    font-size: 28px;
    font-weight: 800;
    line-height: 1;

    cursor: pointer;

    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.back-to-top:hover {
    background-color: #ffcf5a;
    transform: translateY(-3px);
}
.humanity-section {
    width: 100%;
    padding: 90px 10%;
    background-color: #f3ead6;
    color: #1f2a24;
}

.humanity-container {
    max-width: 980px;
    margin: 0 auto;
}

.humanity-container h2 {
    margin-bottom: 36px;
    color: #1f2a24;
    font-size: 42px;
    font-weight: 800;
    letter-spacing: 0.03em;
}

.humanity-text {
    font-size: 18px;
    line-height: 1.9;
    letter-spacing: 0.01em;
}

.humanity-text p {
    margin-bottom: 24px;
}

.humanity-text strong {
    color: #b86800;
    font-weight: 800;
}

.humanity-text em {
    font-style: italic;
    color: #3d4f43;
}
.gameplay-section {
    width: 100%;
    padding: 90px 8%;
    background-color: #10130f;
    color: #f3ead6;
}

.gameplay-container {
    max-width: 1200px;
    margin: 0 auto;
}

.gameplay-container h2 {
    margin-bottom: 42px;
    color: #ffb829;
    font-size: 42px;
    font-weight: 800;
    letter-spacing: 0.05em;
}

.showcase {
    width: 100%;
    display: grid;
    grid-template-columns: 64px 1fr 64px;
    align-items: center;
    gap: 24px;
}

.showcase-content {
    width: 100%;
}

.showcase-content img {
    width: 100%;
    max-height: 680px;
    object-fit: contain;
    display: block;
    background-color: #050705;
    border-radius: 18px;
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.4);
}

.showcase-text-box {
    margin-top: 24px;
    min-height: 140px;
    padding: 28px 32px;
    background-color: rgba(243, 234, 214, 0.08);
    border: 1px solid rgba(255, 184, 41, 0.32);
    border-radius: 16px;
}

.showcase-text-box p {
    font-size: 18px;
    line-height: 1.8;
    color: #f3ead6;
}

.showcase-btn {
    width: 58px;
    height: 58px;
    border: none;
    border-radius: 50%;

    background-color: #ffb829;
    color: #10130f;

    font-size: 44px;
    font-weight: 600;
    line-height: 1;

    cursor: pointer;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.showcase-btn:hover {
    background-color: #ffcf5a;
    transform: scale(1.08);
}

.showcase-dots {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 22px;
}

.dot {
    width: 12px;
    height: 12px;
    border: none;
    border-radius: 50%;
    background-color: rgba(243, 234, 214, 0.35);
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.dot.active {
    background-color: #ffb829;
    transform: scale(1.25);
}

@media (max-width: 760px) {
    .showcase {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .showcase-btn {
        width: 48px;
        height: 48px;
        font-size: 36px;
        margin: 0 auto;
    }

    .prev-btn {
        order: 2;
    }

    .showcase-content {
        order: 1;
    }

    .next-btn {
        order: 3;
    }

    .showcase-text-box {
        padding: 22px;
        min-height: 160px;
    }

    .showcase-text-box p {
        font-size: 16px;
    }
}