/* 公共 UI: 语言设置按钮 + 面板 + 右侧社交侧栏 */
.settings {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 20;
}

.settings-button {
    padding: 10px 18px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    color: #ffffff;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(18px);
    transition: transform 0.2s, background 0.2s;
}

.settings-button:hover {
    transform: scale(1.04);
    background: rgba(255, 255, 255, 0.18);
}

.settings-panel {
    position: absolute;
    top: 56px;
    right: 0;
    width: 300px;
    padding: 14px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 20px;
    background: rgba(17, 24, 39, 0.78);
    box-shadow: 0 22px 55px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(22px);
    display: none;
}

.settings.open .settings-panel {
    display: block;
}

.settings-title {
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 13px;
    font-weight: 700;
}

.language-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.language-option {
    width: 100%;
    height: 40px;
    border: 0;
    border-radius: 12px;
    color: #ffffff;
    font-size: 14px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.1);
    transition: background 0.2s;
}

.language-option:hover,
.language-option.active {
    background: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);
}

.social-sidebar {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 10;
}

.social-icon {
    width: 46px;
    height: 46px;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(18px);
    cursor: pointer;
    transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
    text-decoration: none;
}

.social-icon:hover {
    transform: scale(1.1);
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.3);
}

.social-icon svg {
    width: 24px;
    height: 24px;
    fill: #ffffff;
}

/* ---------- 手机端适配（全站共用） ---------- */
@media (max-width: 640px) {
    html {
        -webkit-text-size-adjust: 100%;
        text-size-adjust: 100%;
    }

    /* 为顶部语言按钮和底部社交栏留出空间 */
    body {
        padding-top: max(56px, calc(48px + env(safe-area-inset-top, 0px))) !important;
        padding-bottom: max(96px, calc(80px + env(safe-area-inset-bottom, 0px))) !important;
    }

    .settings {
        top: max(12px, env(safe-area-inset-top, 0px));
        right: max(12px, env(safe-area-inset-right, 0px));
    }

    .settings-button {
        padding: 8px 12px;
        font-size: 12px;
        max-width: calc(100vw - 24px);
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .settings-panel {
        width: min(300px, calc(100vw - 24px));
        right: 0;
        top: 48px;
        max-height: calc(100vh - 64px);
        overflow-y: auto;
    }

    .language-option {
        height: 44px;
        font-size: 13px;
    }

    /* 右侧社交栏改为底部居中横排，避免挡住主内容 */
    .social-sidebar {
        top: auto;
        bottom: max(16px, env(safe-area-inset-bottom, 0px));
        right: auto;
        left: 50%;
        transform: translateX(-50%);
        flex-direction: row;
        gap: 8px;
    }

    .social-icon {
        width: 42px;
        height: 42px;
        border-radius: 12px;
    }

    .social-icon svg {
        width: 20px;
        height: 20px;
    }
}

@media (max-width: 380px) {
    .settings-button {
        padding: 8px 10px;
        font-size: 11px;
    }

    .social-icon {
        width: 38px;
        height: 38px;
    }
}