/* ============================================================
   SMS 中转站 - 统一响应式适配
   覆盖：前台首页 / 用户控制台 / 管理后台 / 认证页
   ============================================================ */

html { font-size: 14px; }

/* ===== 通用：移动端菜单按钮 & 遮罩 ===== */
.menu-toggle,
.menu-toggle-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    background: #f1f5f9;
    border-radius: 8px;
    color: #475569;
    cursor: pointer;
    flex-shrink: 0;
    padding: 0;
}
.menu-toggle:hover,
.menu-toggle-btn:hover { background: #e2e8f0; color: #0f172a; }

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    z-index: 998;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}
.sidebar-overlay.show { display: block; }

.topbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    flex: 1;
}

.user-layout .page-content,
.admin-layout .page-content { min-width: 0; width: 100%; }
.user-layout .page-content > *,
.admin-layout .page-content > * { max-width: 1440px; margin-left: auto; margin-right: auto; }
.table-wrap { max-width: 100%; }

@media (min-width: 769px) {
    .user-layout .sidebar,
    .admin-layout .sidebar { position: sticky; top: 0; height: 100vh; height: 100dvh; }
    .user-layout .page-content,
    .admin-layout .page-content { padding: 24px; }
}

/* ===== 平板 (≤1200px) ===== */
@media (max-width: 1200px) {
    html { font-size: 13px; }

    :root { --sidebar-width: 200px; }

    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .container { padding: 0 20px; }

    .hero-grid { grid-template-columns: 1fr !important; gap: 32px !important; min-height: 0 !important; }
    .hero-stats { grid-template-columns: repeat(2, 1fr) !important; }
    .hero h1 { font-size: 32px !important; }

    .feature-grid,
    .scene-grid { grid-template-columns: repeat(2, 1fr) !important; }

    .pricing { max-width: 600px !important; grid-template-columns: 1fr !important; }
    .footer-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .recharge-amounts { grid-template-columns: repeat(2, 1fr) !important; }

    .stat-item .info .val { font-size: 18px !important; }
    .card { padding: 20px !important; }
    .form-row .form-grid { grid-template-columns: 1fr 1fr; }
}

/* ===== 手机 (≤768px) ===== */
@media (max-width: 768px) {
    html { font-size: 12px; }
    .container { padding: 0 16px; }

    /* ── 控制台：侧边栏改为抽屉 ── */
    .user-layout,
    .admin-layout {
        flex-direction: row !important;
        height: auto !important;
        min-height: 100vh;
        min-height: 100dvh;
        overflow: visible !important;
    }

    .menu-toggle-btn { display: inline-flex !important; }

    .sidebar {
        position: fixed !important;
        top: 0;
        left: 0;
        bottom: 0;
        width: var(--sidebar-width, 240px) !important;
        max-width: 85vw !important;
        flex-direction: column !important;
        flex-wrap: nowrap !important;
        padding: 0 !important;
        align-items: stretch !important;
        gap: 0 !important;
        z-index: 999;
        transform: translateX(-100%);
        transition: transform 0.28s ease;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
    }
    .sidebar.open { transform: translateX(0); }

    .sidebar-brand {
        height: var(--topbar-height, 56px) !important;
        border-bottom: 1px solid #1e293b !important;
        padding: 0 16px !important;
        font-size: 14px !important;
        flex-shrink: 0;
    }

    .sidebar-nav,
    .sidebar-menu {
        display: flex !important;
        flex-direction: column !important;
        flex-wrap: nowrap !important;
        flex: 1 !important;
        gap: 0 !important;
        padding: 8px 0 !important;
        overflow-y: auto !important;
        overflow-x: hidden !important;
    }

    .menu-link,
    .menu-item {
        border-left: 3px solid transparent !important;
        border-bottom: none !important;
        padding: 10px 16px !important;
        font-size: 13px !important;
        border-radius: 0 !important;
        white-space: nowrap;
    }
    .menu-link.active,
    .menu-item.active {
        border-left-color: #3b82f6 !important;
        border-bottom-color: transparent !important;
    }
    .menu-item.sub-menu { padding-left: 36px !important; }

    .sidebar-footer {
        border-top: 1px solid #1e293b !important;
        padding: 12px 16px !important;
        flex-shrink: 0;
    }

    .main-area,
    .main-content {
        flex: 1 !important;
        width: 100% !important;
        min-width: 0 !important;
        overflow: visible !important;
    }

    .page-content { padding: 12px !important; }

    /* ── 顶栏 ── */
    .topbar {
        height: var(--topbar-height, 56px) !important;
        flex-wrap: nowrap !important;
        gap: 8px !important;
        padding: 0 12px !important;
    }
    .topbar-title {
        font-size: 14px !important;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .topbar-inner {
        height: auto !important;
        flex-wrap: wrap !important;
        gap: 10px !important;
        position: relative;
    }
    .topbar-actions { flex-wrap: wrap !important; gap: 4px !important; flex-shrink: 0; }
    .topbar-user { flex-shrink: 0; font-size: 12px !important; gap: 8px !important; }
    .topbar-user .avatar { width: 28px !important; height: 28px !important; font-size: 12px !important; }
    .topbar-user span { max-width: 110px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

    /* ── 首页导航：折叠菜单 ── */
    .menu-toggle { display: inline-flex !important; }

    .topbar-inner { position: relative; }

    .nav {
        display: none !important;
        position: absolute;
        top: calc(100% + 1px);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column !important;
        flex-wrap: nowrap !important;
        padding: 8px 12px 12px !important;
        border-bottom: 1px solid #e2e8f0;
        box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
        gap: 2px !important;
        width: 100% !important;
        z-index: 200;
    }
    .nav.show {
        display: flex !important;
    }
    .nav a {
        width: 100% !important;
        font-size: 14px !important;
        padding: 10px 14px !important;
    }
    .nav-balance {
        margin-left: 0 !important;
        font-size: 13px !important;
        width: 100%;
        justify-content: center;
    }

    /* ── 统计卡片 ── */
    .stats-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }
    .stat-card,
    .stat-item { padding: 14px 16px !important; }
    .stat-card .val,
    .stat-item .info .val,
    .stat-card .stat-value { font-size: 20px !important; }
    .dashboard-greeting { align-items: flex-start; margin-bottom: 16px; }
    .dashboard-greeting h1 { font-size: 20px !important; }
    .dashboard-greeting h1,
    .dashboard-greeting p { overflow-wrap: anywhere; }
    .dashboard-actions { width: 100%; }
    .dashboard-actions .btn-primary,
    .dashboard-actions .btn-outline { flex: 1; text-align: center; }

    /* ── 特性/场景 ── */
    .feature-grid,
    .scene-grid { grid-template-columns: 1fr !important; gap: 16px !important; }

    /* ── Hero ── */
    .hero { padding: 24px 0 32px !important; }
    .hero h1 { font-size: 26px !important; }
    .hero-desc { font-size: 14px !important; }
    .hero-stats { grid-template-columns: 1fr !important; }
    .hero-actions { flex-direction: column !important; }
    .hero-actions .btn { width: 100% !important; }
    .hero-meta { flex-direction: column !important; gap: 10px !important; }

    /* ── 价格 ── */
    .price-card { padding: 28px 24px !important; }
    .price-card .price { font-size: 32px !important; }
    .recharge-amounts { grid-template-columns: repeat(2, 1fr) !important; }

    /* ── Section / CTA / 页脚 ── */
    .section { padding: 40px 0 !important; }
    .section-title { font-size: 22px !important; }
    .section-head { margin-bottom: 32px !important; }
    .cta { padding: 40px 0 !important; }
    .cta-title { font-size: 22px !important; }
    .cta-actions { flex-direction: column !important; }
    .cta-actions .btn { width: 100% !important; }
    .footer { padding: 40px 0 20px !important; }
    .footer-grid { grid-template-columns: 1fr !important; gap: 24px !important; }

    /* ── 表单 ── */
    .form-input,
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="tel"],
    input[type="url"],
    input[type="search"],
    select,
    textarea,
    button[type="submit"],
    .btn-submit,
    .btn-primary,
    .btn-outline {
        max-width: 100% !important;
    }
    .form-row .form-grid { grid-template-columns: 1fr !important; }
    .form-group input,
    .form-group select,
    .form-group textarea { max-width: 100% !important; width: 100% !important; }
    .input-group { flex-direction: column !important; gap: 8px !important; }
    .input-group .form-input { flex: none !important; width: 100% !important; }
    .btn-code { width: 100% !important; padding: 10px !important; text-align: center !important; }

    /* ── 密钥行 / 操作行 ── */
    .key-box,
    .key-row {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 12px !important;
    }
    .key-box .btn-copy,
    .key-row .btn-outline,
    .key-row button {
        margin-left: 0 !important;
        width: 100% !important;
        text-align: center;
    }

    /* ── 表格 ── */
    .table-wrap {
        display: block !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
        margin: 0 -4px;
        padding: 0 4px;
    }
    .table-wrap table,
    .page-content > table,
    .admin-card .body > table {
        display: block !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
    }
    table { min-width: 560px !important; }
    th, td { padding: 8px 10px !important; font-size: 12px !important; }
    table thead { display: table-header-group !important; }

    /* 操作按钮组换行 */
    .action-btns,
    .table-actions {
        display: flex !important;
        flex-wrap: wrap !important;
        gap: 4px !important;
    }
    .btn-action { font-size: 11px !important; padding: 4px 8px !important; }

    /* ── 卡片 ── */
    .card { padding: 16px !important; margin-bottom: 16px !important; }
    .card-title { font-size: 14px !important; }

    /* ── 认证页 ── */
    .auth-card { padding: 28px 20px 24px !important; max-width: 100% !important; }
    .auth-wrap { padding: 60px 12px 20px !important; }
    .auth-back, .auth-brand { top: 12px !important; font-size: 12px !important; }
    .auth-back { left: 12px !important; padding: 5px 8px !important; }
    .auth-brand { right: 12px !important; }
    .auth-title { font-size: 20px !important; }
    .auth-tabs { flex-direction: row !important; }
    .auth-tab { font-size: 13px !important; padding: 8px 6px !important; }

    /* ── 后台管理 ── */
    .admin-card .head { padding: 10px 14px !important; font-size: 14px !important; }
    .admin-card .body { padding: 14px !important; }
    .admin-card .head { gap: 8px !important; flex-wrap: wrap !important; }
    .actions-td { justify-content: flex-start !important; }

    /* 文章编辑 */
    .article-editor textarea,
    .article-editor input[type="text"] { width: 100% !important; }

    /* ── 弹窗 ── */
    .modal-mask { padding: 12px !important; }
    .modal { max-width: 95vw !important; }
    .modal-body { padding: 14px !important; }
    .modal-foot { flex-wrap: wrap !important; gap: 8px !important; }

    /* ── API 文档 ── */
    .api-info table th,
    .api-info table td { padding: 8px 10px !important; font-size: 12px !important; }
    .api-tabs { gap: 4px !important; flex-wrap: wrap !important; }
    .api-tab { padding: 6px 12px !important; font-size: 12px !important; }
    .code-block { padding: 14px 16px !important; font-size: 11px !important; overflow-x: auto !important; }
    .api-info { padding: 16px !important; }

    /* ── 安装向导 ── */
    .install-wrap { padding: 24px 16px !important; }
    .install-card { padding: 24px 20px !important; }
    .install-head { align-items: flex-start !important; }
    .install-steps { gap: 6px !important; margin-bottom: 20px !important; }
    .install-step { flex: 1 1 calc(50% - 6px); justify-content: center; }
}

/* ===== 小屏 (≤480px) ===== */
@media (max-width: 480px) {
    .hero h1 { font-size: 22px !important; }
    .hero-eyebrow { font-size: 11px !important; }
    .hero-stat-card { padding: 14px 16px !important; }
    .hero-stat-card .v { font-size: 20px !important; }

    .btn { padding: 10px 20px !important; font-size: 13px !important; }
    .btn-lg { padding: 12px 24px !important; font-size: 14px !important; }

    .auth-card { padding: 24px 16px 20px !important; }
    .auth-logo .brand-mark { width: 32px !important; height: 32px !important; }

    .topbar { padding: 0 10px !important; }
    .topbar-title { font-size: 13px !important; }
    .page-content { padding: 10px !important; }

    .recharge-amounts { grid-template-columns: 1fr !important; }

    th, td { font-size: 11px !important; padding: 6px 8px !important; }

    .notice { font-size: 12px !important; padding: 8px 0 !important; }
    .notice-tag { font-size: 11px !important; padding: 2px 8px !important; }

    .topbar-actions a { font-size: 11px !important; padding: 4px 8px !important; }
}