/* ===== 响应式适配 ===== */

/* 平板 */
@media (max-width: 1024px) {
    .hero h1 { font-size: 34px; }
    .header-inner { gap: 12px; }
    .main-nav a { padding: 8px 10px; font-size: 14px; }
}

/* 手机 */
@media (max-width: 768px) {
    /* 头部 */
    .header-inner { height: 60px; }
    .logo img { height: 32px; }
    
    /* 显示菜单按钮 */
    .menu-toggle { display: block; }
    
    /* 导航抽屉 */
    .main-nav {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: calc(100vh - 60px);
        background: var(--bg-white);
        transform: translateX(-100%);
        transition: transform 0.3s;
        overflow-y: auto;
        z-index: 999;
        border-top: 1px solid var(--border);
    }
    .main-nav.open { transform: translateX(0); }
    .main-nav ul { flex-direction: column; padding: 16px; gap: 0; }
    .main-nav a { padding: 14px 16px; border-bottom: 1px solid var(--border); border-radius: 0; font-size: 16px; }
    
    /* 子菜单 */
    .has-submenu .submenu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-top: none;
        border-radius: 0;
        padding: 0;
        display: none;
        background: #FAFAFA;
        width: 100%;
    }
    .has-submenu.open .submenu { display: flex; }
    .has-submenu .submenu li a {
        padding: 12px 16px 12px 36px;
        border-left: none;
        border-bottom: 1px solid var(--border);
        font-size: 15px;
    }
    .has-submenu .submenu li a:hover,
    .has-submenu .submenu li a.active {
        background: var(--primary-bg);
        padding-left: 36px;
    }
    
    /* 头部按钮隐藏 */
    .header-actions { display: none; }
    
    /* 手机端底部固定按钮 */
    .mobile-bottom-bar {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: var(--bg-white);
        border-top: 2px solid var(--primary);
        padding: 10px 16px;
        gap: 12px;
        z-index: 1001;
        box-shadow: 0 -2px 12px rgba(0,0,0,0.08);
    }
    .mobile-bottom-bar .btn { flex: 1; text-align: center; padding: 12px 0; }
    
    /* 内容底部留空间给固定按钮 */
    body { padding-bottom: 70px; }
    
    /* 其他 */
    .hero { padding: 60px 0; }
    .hero h1 { font-size: 26px; }
    .hero p { font-size: 16px; }
    .section { padding: 40px 0; }
    .section-title { font-size: 24px; }
    .page-banner { padding: 40px 0; }
    .page-banner h1 { font-size: 24px; }
    
    .product-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .product-card { padding: 20px 16px; }
    .product-icon { font-size: 32px; }
    
    .news-grid { grid-template-columns: 1fr; }
    
    .product-table { font-size: 13px; }
    .product-table th, .product-table td { padding: 10px 8px; }
    
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
    .footer-grid .footer-col:first-child { grid-column: 1 / -1; }
    
    .article-detail h1 { font-size: 22px; }
    .article-content { font-size: 15px; }
    
    .contact-grid { grid-template-columns: 1fr 1fr; }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .product-card { padding: 16px 12px; }
    .product-card h3 { font-size: 15px; }
    .product-card p { font-size: 12px; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .product-intro { padding: 18px 20px; }
    .feature-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .feature-card { padding: 18px 12px; }
    .feature-icon { font-size: 26px; }
    .feature-card h3 { font-size: 14px; }
    .feature-card p { font-size: 12px; }
    .cta-inner h2 { font-size: 22px; }
    .cta-inner p { font-size: 14px; }
    .product-tabs { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 6px; }
    .product-tabs .tab { flex-shrink: 0; padding: 8px 16px; font-size: 13px; }
}
@media (max-width: 480px) {
    .feature-grid { grid-template-columns: 1fr; }
}
/* ============================================================
   新增页面 - 响应式
   ============================================================ */

/* 平板 */
@media (max-width: 1024px) {
    .platform-intro-grid { gap: 32px; }
    .about-intro { gap: 32px; }
    .news-layout { grid-template-columns: 1fr 280px; gap: 28px; }
    .account-steps { grid-template-columns: repeat(3, 1fr); }
    .step-arrow { display: none; }
}

/* 手机 */
@media (max-width: 768px) {
    /* 首页平台介绍 */
    .platform-intro-grid { grid-template-columns: 1fr; gap: 28px; }
    .platform-intro-text h3 { font-size: 18px; }
    .intro-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }
    .intro-stats .stat-num { font-size: 20px; }
    .platform-intro-visual { grid-template-columns: 1fr 1fr; gap: 12px; }
    .visual-card { padding: 16px 12px; }
    .visual-icon { font-size: 24px; }
    .visual-card h4 { font-size: 14px; }
    .visual-card p { font-size: 11px; }

    .section-subtitle { font-size: 13px; margin-top: -20px; margin-bottom: 28px; }

    /* 全球办公室 */
    .office-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .office-card { padding: 20px 12px; }
    .office-flag { font-size: 32px; }
    .office-card h3 { font-size: 15px; }
    .office-card p { font-size: 12px; }

    /* 监管信息 */
    .regulation-grid { grid-template-columns: 1fr; gap: 14px; }
    .regulation-card { padding: 18px; }

    /* 关于我们 */
    .about-intro { grid-template-columns: 1fr; gap: 24px; }
    .about-intro-text h3 { font-size: 18px; }
    .about-stats-grid { gap: 12px; }
    .about-stat-card { padding: 18px 12px; }
    .about-stat-num { font-size: 18px; }

    /* 时间轴 */
    .timeline { padding-left: 20px; }
    .timeline-line { left: 8px; }
    .timeline-item {
        width: 100%;
        left: 0 !important;
        padding: 0 0 0 30px;
        text-align: left !important;
    }
    .timeline-item::after { left: 0 !important; right: auto !important; }
    .timeline-content { padding: 16px 18px; }
    .timeline-year { font-size: 17px; }

    /* 开户流程 */
    .account-steps { grid-template-columns: 1fr 1fr; gap: 12px; }
    .account-step { padding: 26px 12px 18px; }
    .step-icon { font-size: 26px; }
    .account-step h3 { font-size: 14px; }
    .account-step p { font-size: 11px; }

    /* 交易软件 */
    .software-grid { grid-template-columns: 1fr; gap: 16px; }
    .software-card { padding: 22px 18px; }
    .software-tag { position: static; margin-left: auto; }

    /* 新闻中心 */
    .news-layout { grid-template-columns: 1fr; gap: 24px; }
    .news-sidebar { position: static; }
    .news-list-item { gap: 12px; }
    .news-thumb { width: 110px; height: 80px; }
    .news-list-info h3 { font-size: 15px; margin-bottom: 8px; }
    .news-list-meta { font-size: 12px; gap: 12px; flex-wrap: wrap; }

    /* 分页 */
    .pagination { flex-wrap: wrap; }
    .pagination a { width: 36px !important; height: 36px; font-size: 13px; }
    .page-nav { padding: 0 12px !important; }

    /* 客服服务特点 */
    .service-feature-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .service-feature-card { padding: 20px 12px; }
    .service-icon { width: 50px; height: 50px; font-size: 24px; margin-bottom: 12px; }
    .service-feature-card h3 { font-size: 14px; }
    .service-feature-card p { font-size: 12px; }

    /* FAQ */
    .faq-question { padding: 14px 16px; }
    .faq-q-text { font-size: 14px; }
    .faq-answer { padding: 0 16px; }
    .faq-item.open .faq-answer { padding: 14px 16px; }

    /* CTA */
    .cta-section { padding: 40px 0; }
}

/* 小屏 */
@media (max-width: 480px) {
    .intro-stats { grid-template-columns: 1fr 1fr; }
    .office-grid { grid-template-columns: 1fr 1fr; }
    .about-stats-grid { grid-template-columns: 1fr 1fr; }
    .account-steps { grid-template-columns: 1fr; }
    .service-feature-grid { grid-template-columns: 1fr; }
    .platform-intro-visual { grid-template-columns: 1fr; }
    .news-thumb { width: 90px; height: 70px; }
    .hero-btns { flex-direction: column; }
    .hero-btns .btn { width: 100%; }
}
/* ============================================================
   手机端：显示 Logo 旁 QQ 按钮
   ============================================================ */
@media (max-width: 768px) {
    /* 让 header 三段布局：logo-wrap（含QQ）| nav | toggle */
    .header-inner {
        justify-content: space-between;
        gap: 8px;
    }
    .logo-wrap {
        gap: 8px;
        flex: 1;
        min-width: 0;
    }
    .logo img {
        height: 30px;
        width: auto;
    }
    /* 手机端显示QQ按钮 */
    .mobile-qq {
        display: inline-flex;
    }
    /* 导航和菜单按钮固定尺寸 */
    .main-nav { flex-shrink: 0; }
    .menu-toggle { flex-shrink: 0; }
}

/* 超小屏进一步压缩 */
@media (max-width: 375px) {
    .mobile-qq {
        padding: 4px 8px;
        max-width: 110px;
    }
    .mobile-qq-text em { display: none; }
    .mobile-qq-text b { font-size: 11px; }
    .logo img { height: 26px; }
}
/* ============================================================
   首页内容充实 - 响应式
   ============================================================ */

/* 平板 */
@media (max-width: 1024px) {
    .trading-env-grid { grid-template-columns: repeat(3, 1fr); }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .history-grid { grid-template-columns: repeat(3, 1fr); }
    .core-values-grid { grid-template-columns: repeat(2, 1fr); }
}

/* 手机 */
@media (max-width: 768px) {
    /* Hero */
    .hero-features {
        gap: 14px 20px;
        margin-top: 20px;
        padding-top: 18px;
    }
    .hero-features span { font-size: 12px; }

    /* 交易环境 */
    .trading-env-intro p { font-size: 14px; }
    .trading-env-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        margin-bottom: 28px;
    }
    .trading-env-card { padding: 18px 10px; }
    .env-icon { font-size: 22px; margin-bottom: 6px; }
    .env-value { font-size: 18px; }
    .env-label { font-size: 12px; }
    .env-sub { font-size: 10px; }

    /* 为什么选择XM */
    .why-grid { grid-template-columns: 1fr; gap: 16px; }
    .why-card { padding: 24px 20px; }
    .why-icon-wrap {
        width: 50px;
        height: 50px;
        border-radius: 12px;
        margin-bottom: 14px;
    }
    .why-icon { font-size: 24px; }
    .why-card h3 { font-size: 16px; }
    .why-card p { font-size: 13px; }

    /* 监管介绍 */
    .regulation-intro p { font-size: 14px; }

    /* FAQ */
    .faq-section .faq-question { padding: 14px 16px; gap: 10px; }
    .faq-section .faq-q-text { font-size: 14px; }
    .faq-section .faq-answer { padding: 0 16px; }
    .faq-section .faq-item.open .faq-answer { padding: 14px 16px; }

    /* 关于我们 - 发展历程 */
    .history-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .history-card { padding: 18px 14px; }
    .history-card-head { gap: 8px; margin-bottom: 10px; }
    .history-icon { font-size: 18px; }
    .history-year { font-size: 20px; }
    .history-card h3 { font-size: 14px; margin-bottom: 8px; }
    .history-card p { font-size: 12px; line-height: 1.65; }

    /* 核心价值 */
    .core-values-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .core-value-card { padding: 18px 12px; }
    .core-icon { font-size: 26px; margin-bottom: 8px; }
    .core-value-card h4 { font-size: 14px; }
    .core-value-card p { font-size: 12px; }

    /* 新闻更多按钮 */
    .news-more { margin-top: 28px; }

    /* 关于我们平台介绍 */
    .about-intro-text p { font-size: 14px; line-height: 1.8; }
}

/* 小屏 */
@media (max-width: 480px) {
    .trading-env-grid { grid-template-columns: repeat(2, 1fr); }
    .history-grid { grid-template-columns: 1fr; }
    .core-values-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-features { gap: 10px 16px; }
    .hero-features span { font-size: 11px; }
}