/* MetaEvo 响应式样式 */

/* ===== 大屏幕 (桌面) ===== */
@media (min-width: 1200px) {
    .container {
        max-width: var(--container-xxl);
    }
    
    .hero-title {
        font-size: 4rem;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== 中等屏幕 (平板横屏/小桌面) ===== */
@media (max-width: 1199px) and (min-width: 992px) {
    .container {
        max-width: var(--container-xl);
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .evolution-cycle {
        width: 280px;
        height: 280px;
    }
    
    .cycle-point {
        transform: translate(-50%, -50%) rotate(calc(var(--i) * 45deg)) translateX(130px);
    }
}

/* ===== 小屏幕 (平板竖屏) ===== */
@media (max-width: 991px) and (min-width: 768px) {
    .container {
        max-width: var(--container-lg);
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-description {
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .evolution-cycle {
        width: 250px;
        height: 250px;
        order: -1;
    }
    
    .cycle-point {
        transform: translate(-50%, -50%) rotate(calc(var(--i) * 45deg)) translateX(115px);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

/* ===== 超小屏幕 (手机) ===== */
@media (max-width: 767px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    /* 导航栏响应式 */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-light);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    /* 英雄区域 */
    .hero {
        padding: 6rem 0 4rem;
        margin-top: 3rem;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-description {
        font-size: 1rem;
        max-width: 100%;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-actions .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .evolution-cycle {
        width: 200px;
        height: 200px;
        order: -1;
    }
    
    .cycle-point {
        width: 16px;
        height: 16px;
        transform: translate(-50%, -50%) rotate(calc(var(--i) * 45deg)) translateX(90px);
    }
    
    .cycle-center {
        width: 60px;
        height: 60px;
        font-size: 1.25rem;
    }
    
    /* 技能区域 */
    .skills-section {
        padding: 4rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1.125rem;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .skill-card {
        padding: var(--spacing-lg);
    }
    
    .skill-icon {
        font-size: 2.5rem;
    }
    
    .icon-brain, .icon-efficiency {
        width: 70px;
        height: 70px;
        font-size: 2rem;
    }
    
    .skill-title {
        font-size: 1.5rem;
    }
    
    /* 特性区域 */
    .features-section {
        padding: 4rem 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .feature-item {
        padding: var(--spacing-lg);
    }
    
    .feature-icon {
        font-size: 2.5rem;
    }
    
    .feature-title {
        font-size: 1.25rem;
    }
    
    /* 行动号召 */
    .cta-section {
        padding: 4rem 0;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .cta-description {
        font-size: 1.125rem;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-actions .btn {
        width: 100%;
        max-width: 300px;
    }
    
    /* 页脚 */
    .footer {
        padding: 3rem 0 1.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        margin-bottom: var(--spacing-xl);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-legal {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .footer-social {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* ===== 超小屏幕 (小手机) ===== */
@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .evolution-cycle {
        width: 180px;
        height: 180px;
    }
    
    .cycle-point {
        width: 14px;
        height: 14px;
        transform: translate(-50%, -50%) rotate(calc(var(--i) * 45deg)) translateX(80px);
    }
    
    .cycle-center {
        width: 50px;
        height: 50px;
        font-size: 1rem;
    }
    
    .btn-large {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 1rem;
    }
    
    .feature-tag {
        font-size: 0.75rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

/* ===== 打印样式 ===== */
@media print {
    .navbar,
    .hero-actions,
    .cta-section,
    .footer {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    a {
        color: #000;
        text-decoration: underline;
    }
    
    .gradient-text {
        background: none;
        color: #000;
    }
}

/* ===== 高对比度模式支持 ===== */
@media (prefers-contrast: high) {
    :root {
        --color-primary: #0056B3;
        --color-secondary: #00875A;
        --color-dark: #000000;
        --color-light: #FFFFFF;
    }
    
    .gradient-text {
        background: none;
        color: var(--color-primary);
    }
    
    .btn-primary {
        background: var(--color-primary);
    }
}

/* ===== 减少动画模式 ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .evolution-cycle,
    .cycle-point {
        animation: none;
    }
    
    .skill-card:hover {
        transform: none;
    }
}

/* ===== 暗色模式 ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --color-dark: #FFFFFF;
        --color-gray-900: #F8F9FA;
        --color-gray-800: #E9ECEF;
        --color-gray-700: #DEE2E6;
        --color-gray-600: #CED4DA;
        --color-gray-500: #ADB5BD;
        --color-gray-400: #6C757D;
        --color-gray-300: #495057;
        --color-gray-200: #343A40;
        --color-light: #212529;
    }
    
    body {
        background-color: var(--color-light);
        color: var(--color-gray-700);
    }
    
    h1, h2, h3, h4, h5, h6 {
        color: var(--color-dark);
    }
    
    .navbar {
        background: rgba(33, 37, 41, 0.95);
        border-bottom-color: var(--color-gray-300);
    }
    
    .nav-brand .logo {
        color: var(--color-dark);
    }
    
    .nav-link {
        color: var(--color-gray-500);
    }
    
    .nav-link:hover,
    .nav-link.active {
        color: var(--color-primary);
    }
    
    .skill-card {
        background: var(--color-gray-200);
    }
    
    .feature-tag {
        background: var(--color-gray-300);
        color: var(--color-gray-800);
    }
    
    .footer {
        background: #1A1A1A;
    }
    
    @media (max-width: 767px) {
        .nav-menu {
            background: var(--color-gray-200);
        }
    }
}