/* ===== 响应式设计系统 ===== */

/* ===== 超大屏幕 (≥1400px) ===== */
@media (min-width: 1400px) {
    .container-xxl {
        max-width: 1320px;
    }
    
    .hero-area h1 {
        font-size: 4.5rem;
    }
    
    .hero-area .lead {
        font-size: 1.5rem;
    }
    
    .card-body {
        padding: 2.5rem;
    }
    
    .btn-xl {
        font-size: 1.25rem;
        padding: 1.5rem 3rem;
    }
}

/* ===== 大屏幕 (≥1200px) ===== */
@media (min-width: 1200px) {
    .hero-area {
        min-height: 100vh;
    }
    
    .section-padding {
        padding: 6rem 0;
    }
    
    .card-columns {
        column-count: 3;
    }
}

/* ===== 中等屏幕 (≥992px) ===== */
@media (min-width: 992px) {
    .navbar-nav {
        margin-left: auto;
    }
    
    .hero-area .container {
        padding-top: 2rem;
        padding-bottom: 2rem;
    }
    
    .card-columns {
        column-count: 2;
    }
    
    .footer-main {
        padding: 4rem 0 2rem 0;
    }
}

/* ===== 平板设备 (≥768px) ===== */
@media (min-width: 768px) {
    .hero-area h1 {
        font-size: 3.5rem;
    }
    
    .hero-area .lead {
        font-size: 1.25rem;
    }
    
    .ip-query-form {
        padding: 2rem !important;
    }
    
    .btn-group-responsive .btn {
        margin-bottom: 0;
        margin-right: 0.5rem;
    }
    
    .card-deck .card {
        margin-bottom: 0;
    }
}

/* ===== 小屏幕设备 (≥576px) ===== */
@media (min-width: 576px) {
    .hero-area {
        padding: 4rem 0;
    }
    
    .container-sm {
        max-width: 540px;
    }
    
    .modal-dialog {
        max-width: 500px;
    }
}

/* ===== 超小屏幕设备 (<576px) ===== */
@media (max-width: 575.98px) {
    /* 导航栏 */
    .navbar {
        padding: 0.75rem 0;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .navbar-toggler {
        border: none;
        padding: 0.25rem 0.5rem;
    }
    
    .navbar-collapse {
        margin-top: 1rem;
        padding-top: 1rem;
        border-top: 1px solid var(--border-subtle);
    }
    
    .nav-link {
        padding: 0.75rem 0 !important;
        text-align: center;
    }
    
    /* 英雄区域 */
    .hero-area {
        min-height: 80vh;
        padding: 2rem 0;
    }
    
    .hero-area h1 {
        font-size: 2.5rem;
        margin-bottom: 1.5rem;
    }
    
    .hero-area .lead {
        font-size: 1.125rem;
        margin-bottom: 2rem;
    }
    
    .ip-query-form {
        padding: 1.5rem !important;
        margin: 0 1rem;
    }
    
    .ip-query-form h3 {
        font-size: 1.25rem !important;
        margin-bottom: 1rem !important;
    }
    
    .ip-query-form .form-control {
        margin-bottom: 1rem;
    }
    
    /* 按钮 */
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .btn-group-responsive .btn {
        width: 100%;
        margin-bottom: 0.5rem;
        margin-right: 0;
    }
    
    .btn-floating {
        bottom: 1rem;
        right: 1rem;
        width: 48px;
        height: 48px;
    }
    
    /* 卡片 */
    .card {
        margin-bottom: 1rem;
    }
    
    .card-body {
        padding: 1.25rem;
    }
    
    .card-header {
        padding: 1rem 1.25rem;
    }
    
    .card-footer {
        padding: 1rem 1.25rem;
    }
    
    /* 工具卡片 */
    .tool-card {
        padding: 1.5rem;
        min-height: 150px;
    }
    
    .tool-card .tool-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .tool-card .tool-title {
        font-size: 1.125rem;
    }
    
    /* 表格 */
    .table-responsive {
        font-size: 0.875rem;
    }
    
    /* 模态框 */
    .modal-dialog {
        margin: 1rem;
    }
    
    .modal-header {
        padding: 1rem;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .modal-footer {
        padding: 1rem;
    }
    
    /* 页脚 */
    .footer-main {
        padding: 2rem 0 1rem 0;
    }
    
    .footer-brand {
        text-align: center;
        margin-bottom: 1.5rem;
    }
    
    .footer-description {
        text-align: center;
        margin-bottom: 1.5rem;
    }
    
    .social-links {
        justify-content: center;
        margin-bottom: 2rem;
    }
    
    .footer-title {
        text-align: center;
        justify-content: center;
        margin-bottom: 1rem;
    }
    
    .footer-links {
        text-align: center;
        margin-bottom: 2rem;
    }
    
    .footer-bottom {
        text-align: center;
        padding: 1rem 0;
    }
    
    /* 动画优化 */
    .hover-lift:hover,
    .hover-lift-lg:hover {
        transform: none;
    }
    
    .animate-on-scroll {
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ===== 超小屏幕设备 (<480px) ===== */
@media (max-width: 479.98px) {
    .hero-area h1 {
        font-size: 2rem;
    }
    
    .hero-area .lead {
        font-size: 1rem;
    }
    
    .ip-query-form {
        padding: 1rem !important;
        margin: 0 0.5rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn {
        font-size: 0.875rem;
        padding: 0.625rem 1.25rem;
    }
    
    .tool-card {
        padding: 1rem;
        min-height: 120px;
    }
    
    .tool-card .tool-icon {
        font-size: 2rem;
    }
    
    .footer-main {
        padding: 1.5rem 0 1rem 0;
    }
}

/* ===== 横屏模式优化 ===== */
@media (orientation: landscape) and (max-height: 600px) {
    .hero-area {
        min-height: 100vh;
        padding: 1rem 0;
    }
    
    .hero-area h1 {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .hero-area .lead {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }
    
    .ip-query-form {
        padding: 1.5rem !important;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .navbar,
    .footer,
    .btn,
    .social-links,
    .page-loader,
    .scroll-indicator {
        display: none !important;
    }
    
    .hero-area {
        background: white !important;
        color: black !important;
        min-height: auto;
        padding: 1rem 0;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
        break-inside: avoid;
    }
    
    a {
        color: black !important;
        text-decoration: underline !important;
    }
    
    .container {
        max-width: none !important;
        width: 100% !important;
    }
}

/* ===== 高对比度模式 ===== */
@media (prefers-contrast: high) {
    :root {
        --primary-black: #000000;
        --bg-primary: #ffffff;
        --text-color: #000000;
        --border-light: #000000;
    }
    
    .card {
        border: 2px solid #000000 !important;
    }
    
    .btn {
        border: 2px solid #000000 !important;
    }
}

/* ===== 深色模式偏好 ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1a1a1a;
        --bg-secondary: #2a2a2a;
        --text-color: #ffffff;
        --text-light: #cccccc;
        --border-light: rgba(255, 255, 255, 0.1);
    }
    
    body {
        background: var(--bg-primary);
        color: var(--text-color);
    }
    
    .card {
        background: var(--bg-secondary);
        color: var(--text-color);
    }
}