/* ======================================
   styles.mobile.css
   统一媒体查询（Responsive Consolidation）
   采用 max-width 从大到小的顺序：1200, 992, 768, 576
   说明：基础样式留在 styles.css，本文件仅包含响应式覆盖
   ====================================== */

@media (max-width: 1200px) {
    .main-title { font-size: 4.5rem; }
    .sub-title { font-size: 4rem; }
}

@media (max-width: 992px) {
    .main-title { font-size: 3.5rem; line-height: 1.2; }
    .sub-title { font-size: 3rem; line-height: 1.2; }
}

@media (max-width: 768px) {
    /* Slide 调整 */
    .slide.show-description .title-group { transform: translateY(-35%); }
    .slide.show-description .content-group { transform: translate(-50%, -50%) translateY(-5%); }

    /* 导航与首屏文字 */
    .navbar { left: 20px; right: 20px; width: calc(100% - 40px); padding: 25px 20px; border-radius: var(--navbar-mobile-radius, 8px); }
    .navbar.menu-open { border-radius: var(--navbar-mobile-radius, 8px) var(--navbar-mobile-radius, 8px) 0 0; border-bottom: none; background: #ffffff !important; backdrop-filter: none; box-shadow: none; }
    .nav-container { padding: 0; min-width: auto; justify-content: center; position: relative; }
    .desktop-nav { display: none; }
    .mobile-menu-toggle { display: flex; position: absolute; left: 0; top: 50%; transform: translateY(-50%); }
    .mobile-menu { display: block; }
    .nav-center { justify-content: center; }
    .brand-name { font-size: 22px; }
    .content-container { padding: 0 20px; }
    .main-title { font-size: 2.8rem; line-height: 1.2; }
    .desktop-break { display: none; }
    .mobile-break { display: block; }
    .sub-title { font-size: 2.2rem; line-height: 1.3; }
    .description { font-size: 16px; line-height: 1.4; max-width: 95%; margin: 32px auto 0; }
    .description p { font-size: 16px; line-height: 1.4; margin-bottom: 10px !important; }
    .text-slider { min-height: 320px; }

    /* 内容区域 */
    .content-section { flex-direction: column !important; gap: 40px; padding: 0 20px; }
    .section-text, .philosophy-image { width: 100%; }
    .section-text { padding-right: 0; text-align: center; }
    .section-text h2 { font-size: 2.2rem; line-height: 1.2; margin-bottom: 20px; }
    .section-text p { font-size: 18px; line-height: 1.4; }
    .philosophy-image { max-height: 40vh; width: 80%; margin: 0 auto; }

    /* 宇宙系列 */
    .universe-banner { padding: 60px 30px; text-align: center; }
    .universe-text-content { max-width: 100%; }
    .series-title { font-size: 2.2rem; margin-bottom: 20px; }
    .series-description { font-size: 0.9rem; line-height: 1.6; max-width: 100%; }
    .universe-gallery { flex-direction: column; gap: 30px; margin-top: 40px; }
    .gallery-item { flex-basis: auto; }

    /* 触摸/性能优化 */
    .nav-link { padding: 8px 4px; min-height: 44px; display: flex; align-items: center; justify-content: center; }
    
    /* 移动端背景切换优化 */
    .background-image-container { 
        transform: translateZ(0); 
        will-change: opacity, transform; 
        backface-visibility: hidden;
        -webkit-backface-visibility: hidden;
    }
    
    .bg-image-wrapper { 
        transform: translateZ(0); 
        will-change: transform;
        backface-visibility: hidden;
        -webkit-backface-visibility: hidden;
    }
    
    /* 视频元素优化 */
    .video-background video {
        will-change: opacity;
        backface-visibility: hidden;
        -webkit-backface-visibility: hidden;
    }
    
    /* 文字内容优化 */
    .main-title, .sub-title { 
        -webkit-user-select: none; 
        user-select: none; 
        will-change: opacity;
        backface-visibility: hidden;
        -webkit-backface-visibility: hidden;
    }
    
    .background-text-content {
        will-change: opacity;
        backface-visibility: hidden;
        -webkit-backface-visibility: hidden;
    }
    
    body { overflow-x: hidden; }

    /* Gleam Project 手机端样式 */
    .gleam-image-section {
        padding: 0;
        min-height: 60vh;
        display: flex;
        align-items: flex-end;
        justify-content: center;
        text-align: center;
        /* 保留people.jpg背景图片 */
    }
    
    .gleam-image-section::before {
        /* 移除桌面端的渐变遮罩 */
        display: none;
    }
    
    .gleam-image-overlay {
        max-width: 100%;
        padding: 40px 20px;
        background: none;
        width: 100%;
    }
    
    /* 移动端：隐藏图片区域内的过期提示，避免与下方重复 */
    .gleam-image-section .expiration-note {
        display: none;
    }
    
    /* 手机端隐藏桌面端文字内容 */
    .desktop-footer-text {
        display: none;
    }
    
    /* 手机端显示文字区域 */
    .gleam-text-section {
        display: block;
        background: #000000;
        padding: 40px 20px;
        color: #fff;
        max-width: 100%;
        text-align: center;
    }
    
    .gleam-text-section .footer-text p {
        font-family: 'Helvetica Now Display', 'Helvetica', 'Arial', sans-serif;
    }
    
    .footer-title {
        font-size: 3rem;
        margin-bottom: 0;
        color: #fff;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    /* Footer */
    .site-footer { flex-direction: column; gap: 20px; padding: 30px 20px; text-align: center; }
    .footer-logo-section { flex-direction: column; gap: 15px; text-align: center; }
    .footer-legal { text-align: center; gap: 2px; }
    .footer-links-section { flex-direction: column; gap: 20px; width: 100%; }
    .footer-separator { width: 60%; height: 1px; margin: 0 auto; }
    .social-icons { justify-content: center; gap: 25px; }
    .social-icons img { height: 20px; }

    /* Products 跳转过渡页面768px优化 */
    .transition-overlay {
        padding-top: 100px;
    }
    
    .transition-logo {
        width: 80px;
        margin-bottom: 35px;
    }
    
    .transition-title {
        font-size: 2.3rem;
    }
    
    .transition-subtitle {
        font-size: 1.15rem;
    }
    
    .transition-loader {
        width: 200px;
    }
    
    .transition-skip-btn {
        padding: 13px 30px;
    }
}

@media (max-width: 576px) {
    /* Slide 更小屏细化 */
    .slide.show-description .title-group { transform: translateY(-30%); }
    .slide.show-description .content-group { transform: translate(-50%, -50%) translateY(-8%); }

    /* 导航 */
    .navbar { left: 15px; right: 15px; width: calc(100% - 30px); padding: 22px 15px; border-radius: var(--navbar-mobile-radius, 8px); }
    .navbar.menu-open { border-radius: var(--navbar-mobile-radius, 8px) var(--navbar-mobile-radius, 8px) 0 0; border-bottom: none; background: #ffffff !important; backdrop-filter: none; box-shadow: none; }
    .nav-container { justify-content: center; min-width: auto; position: relative; }

    /* 汉堡按钮 */
    .mobile-menu-toggle { width: 28px; height: 16px; }
    .hamburger-line { width: 18px; height: 1.5px; }

    /* 字体与间距 */
    .brand-name { font-size: 20px; }
    .main-title { font-size: 1.8rem; line-height: 1.2; }
    .desktop-break { display: none; }
    .mobile-break { display: block; }
    .sub-title { font-size: 1.4rem; line-height: 1.3; margin-bottom: 25px; }
    .description { font-size: 14px; line-height: 1.4; max-width: 95%; margin: 28px auto 0; }
    .description p { font-size: 14px; line-height: 1.4; margin-bottom: 8px !important; }
    .text-slider { min-height: 280px; }
    .scroll-indicator { bottom: 30px; }

    /* 移动端菜单 */
    .mobile-menu-content { padding: 15px; gap: 15px; }
    .mobile-nav-link { font-size: 15px; padding: 8px 12px; }

    /* 背景文字 */
    .background-text-content { padding-top: 15vh; }
    .background-text-content p { font-size: 18px; line-height: 26px; }
    .highlight-text { font-size: 18px; line-height: 26px; }

    /* 内容区域 */
    .content-wrapper { gap: 80px; padding: 0 15px; }
    .section-text h2 { font-size: 1.8rem; }
    .section-text p { font-size: 16px; }

    /* 宇宙系列 */
    .universe-banner { padding: 40px 20px; }
    .series-title { font-size: 1.8rem; }
    .series-subtitle { font-size: 0.9rem; }
    .series-description { font-size: 0.85rem; }

    /* Gleam Project 小屏幕样式 */
    .gleam-image-section {
        min-height: 50vh;
        /* 保留people.jpg背景图片 */
    }
    
    .gleam-image-section::before {
        /* 移除桌面端的渐变遮罩 */
        display: none;
    }
    
    .gleam-image-overlay {
        padding: 30px 15px;
        background: none;
    }
    
    /* 小屏：同样隐藏图片区域内的过期提示，确保仅在文字区显示 */
    .gleam-image-section .expiration-note {
        display: none;
    }
    
    /* 小屏幕也隐藏桌面端文字内容 */
    .desktop-footer-text {
        display: none;
    }
    
    /* 小屏幕显示手机端文字区域 */
    .gleam-text-section {
        display: block;
        background: #000000;
        padding: 30px 15px;
        color: #fff;
        text-align: center;
    }
    
    .gleam-text-section .footer-text p {
        font-family: 'Helvetica Now Display', 'Helvetica', 'Arial', sans-serif;
    }
    
    .footer-title {
        font-size: 2.5rem;
        color: #fff;
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    }

    /* Footer 微调 */
    .site-footer { padding: 25px 15px; gap: 15px; }
    .footer-legal { font-size: 0.7rem; }
    .footer-link-item { font-size: 0.8rem; }
    .social-icons { gap: 20px; }

    /* Products 跳转过渡页面小屏幕优化 */
    .transition-overlay {
        padding-top: 80px;
    }
    
    .transition-logo {
        width: 55px;
        margin-bottom: 25px;
    }
    
    .transition-title {
        font-size: 1.5rem;
        letter-spacing: 0.5px;
    }
    
    .transition-subtitle {
        font-size: 0.95rem;
        margin-bottom: 30px;
    }
    
    .transition-loader {
        width: 140px;
        margin-bottom: 25px;
    }
    
    .transition-skip-btn {
        padding: 10px 24px;
        font-size: 0.85rem;
    }
    
    .transition-hint {
        font-size: 0.85rem;
    }
}