/* ===== 顶级品牌响应式设计 ===== */
/* 移动端优先，保持极致简约 */

@media (max-width: 1200px) {
    .container {
        max-width: 1140px;
        padding: 0 var(--spacing-md);
    }
    
    h1 {
        font-size: 3rem;
    }
    
    h2 {
        font-size: 2.25rem;
    }
}

@media (max-width: 992px) {
    /* 平板设备优化 */
    .container {
        max-width: 960px;
        padding: 0 var(--spacing-md);
    }
    
    .nav-menu {
        gap: var(--spacing-lg);
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .section-hero {
        padding: var(--spacing-xxl) 0;
    }
}

@media (max-width: 768px) {
    /* 移动端设计 - 极致简约 */
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-xxl: 3rem;
        --spacing-hero: 4rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .main-nav .container {
        height: 64px;
    }
    
    .main-nav.scrolled {
        height: 60px;
    }
    
    /* 移动端菜单系统 */
    .menu-toggle {
        display: block;
        order: 1;
    }
    
    .nav-left {
        order: 2;
        flex: 1;
        justify-content: center;
    }
    
    .nav-right {
        order: 3;
    }
    
    /* 隐藏桌面菜单 */
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background-color: var(--color-absolute-white);
        flex-direction: column;
        align-items: center;
        padding: var(--spacing-lg) var(--spacing-md);
        box-shadow: var(--shadow-medium);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: all var(--transition-normal);
        z-index: var(--z-index-modal);
        gap: var(--spacing-md);
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-menu a {
        padding: var(--spacing-sm) 0;
        font-size: var(--font-size-base);
        width: 100%;
        text-align: center;
    }
    
    .dropdown-content {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: none;
        padding: 0;
        margin-top: var(--spacing-sm);
    }
    
    .dropdown-content a {
        font-size: var(--font-size-sm);
        color: var(--color-slate-gray);
    }
    
    .dropdown-content a:hover {
        background: none;
        color: var(--color-midnight-black);
    }
    
    /* 隐藏部分元素 */
    .language-selector {
        display: none;
    }
    
    .nav-icons {
        gap: var(--spacing-sm);
    }
    
    /* 版式调整 */
    h1 {
        font-size: 2.25rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .section-hero {
        padding: var(--spacing-xxl) 0;
    }
}

@media (max-width: 480px) {
    /* 小屏幕极致优化 */
    :root {
        --font-size-hero: 2rem;
        --font-size-xxl: 1.75rem;
        --font-size-xl: 1.5rem;
        --font-size-lg: 1.25rem;
        --font-size-md: 1rem;
        --font-size-base: 0.875rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .main-nav .container {
        height: 60px;
    }
    
    .logo {
        font-size: var(--font-size-lg);
    }
    
    .notification-bar {
        font-size: 0.6875rem; /* 11px */
        padding: 0.375rem 0;
    }
    
    .nav-menu {
        top: 60px;
    }
    
    .nav-icon {
        font-size: var(--font-size-base);
    }
    
    /* 按钮优化 */
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-base);
    }
    
    /* 间距调整 */
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .section-hero {
        padding: var(--spacing-xl) 0;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --color-pure-white: #0A0A0A;
        --color-warm-white: #1A1A1A;
        --color-pale-gray: #2A2A2A;
        --color-slate-gray: #8A8A8A;
        --color-graphite: #D0D0D0;
        --color-midnight-black: #F5F5F5;
        --color-accent-dark: #E0E0E0;
        --color-accent-medium: #A0A0A0;
        --color-accent-light: #3A3A3A;
    }
    
    .main-nav {
        background-color: rgba(10, 10, 10, 0.98);
        border-bottom-color: var(--color-accent-light);
    }
    
    .main-nav.scrolled {
        background-color: rgba(10, 10, 10, 0.98);
    }
    
    .notification-bar {
        background-color: rgba(250, 250, 250, 0.98);
        color: var(--color-midnight-black);
    }
    
    .notification-bar a {
        color: var(--color-brushed-bronze);
    }
}

/* ===== 顶级品牌动画系统 ===== */
/* 丝绸般顺滑 · 精致微妙 · 增强体验 */

/* 页面加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 精致微交互动画 */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% center;
    }
    100% {
        background-position: 200% center;
    }
}

@keyframes rotateSlow {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 滚动触发动画类 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-on-scroll.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* 高级悬停效果 */
.hover-lift {
    transition: transform var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-4px);
}

.hover-glow {
    position: relative;
    overflow: hidden;
}

.hover-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.hover-glow:hover::before {
    opacity: 1;
}

/* 页面加载序列 */
.page-load-animation {
    animation: fadeIn 0.8s ease-out;
}

.page-load-animation.delay-1 {
    animation-delay: 0.1s;
}

.page-load-animation.delay-2 {
    animation-delay: 0.2s;
}

.page-load-animation.delay-3 {
    animation-delay: 0.3s;
}

.page-load-animation.delay-4 {
    animation-delay: 0.4s;
}

/* 按钮涟漪效果 */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 1%, transparent 1%) center/15000%;
    opacity: 0;
    transition: opacity var(--transition-fast), background-size var(--transition-fast);
}

.ripple:active::after {
    background-size: 100%;
    opacity: 1;
    transition: background-size 0s;
}

/* 滚动进度指示器 */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-midnight-black);
    z-index: var(--z-index-toast);
    transition: width var(--transition-fast);
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 打印样式优化 */
@media print {
    .notification-bar,
    .main-nav,
    .nav-right,
    .menu-toggle,
    .footer,
    .scroll-progress {
        display: none;
    }
    
    * {
        animation: none !important;
        transition: none !important;
    }
    
    body {
        background-color: white;
        color: black;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    .section {
        padding: 0;
        break-inside: avoid;
    }
    
    .page-load-animation {
        animation: none !important;
        opacity: 1 !important;
    }
}