/* 自定义样式 */

/* 字体导入 */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url(../webfonts/inter-v19-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(../webfonts/inter-v19-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(../webfonts/inter-v19-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(../webfonts/inter-v19-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(../webfonts/inter-v19-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url(../webfonts/inter-v19-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 900;
  font-display: swap;
  src: url(../webfonts/inter-v19-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* 全局样式重置 */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    color: #333;
    scroll-behavior: smooth;
}

/* 自定义动画 */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse-slow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(67, 97, 238, 0.3); }
    50% { box-shadow: 0 0 40px rgba(67, 97, 238, 0.6); }
}

@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(2);
        opacity: 0;
    }
}

/* 动画类 */
.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-pulse-slow {
    animation: pulse-slow 3s ease-in-out infinite;
}

.animate-glow {
    animation: glow 2s ease-in-out infinite;
}

.animate-ripple {
    animation: ripple 0.6s linear;
}

/* QR码悬浮效果 */
.qr-code-container {
    position: relative;
    transition: all 0.3s ease;
}

.qr-code-container::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #4361EE, #4CC9F0, #F72585, #3A0CA3);
    border-radius: 18px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.qr-code-container:hover::before {
    opacity: 1;
    animation: glow 2s ease-in-out infinite;
}

/* 功能卡片效果 */
.feature-card {
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.feature-card:hover::before {
    left: 100%;
}

/* 场景卡片悬浮效果 */
.scene-card {
    transition: all 0.3s ease;
}

.scene-card:hover {
    transform: translateY(-8px) scale(1.02);
}

/* 语法组件3D倾斜效果 */
.grammar-component {
    transition: all 0.3s ease;
    transform-style: preserve-3d;
}

.grammar-component:hover {
    transform: rotateX(5deg) rotateY(5deg) translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* 滚动进入动画 */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s ease;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.6s ease;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 按钮特效 */
.btn-primary {
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.btn-primary:hover::after {
    width: 300px;
    height: 300px;
}

/* 手机样机3D效果 */
.phone-mockup {
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
}

.phone-mockup:hover {
    transform: rotateY(15deg) rotateX(5deg);
}

/* 进度条动画 */
.progress-bar {
    position: relative;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #4CC9F0, #4361EE);
    border-radius: 50px;
    transition: width 1s ease;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.3) 50%, transparent 100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* 响应式设计优化 */
@media (max-width: 768px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .grid {
        gap: 1.5rem;
    }
    
    .text-5xl {
        font-size: 2.5rem;
    }
    
    .text-6xl {
        font-size: 3rem;
    }
}

/* iframe平滑加载和自适应 */
iframe {
    opacity: 0;
    transition: opacity 0.3s ease;
    display: block;
    border: none;
    overflow: hidden;
}

iframe.loaded {
    opacity: 1;
}

iframe.auto-resize-iframe {
    width: 100%;
    border: 0;
    margin: 0;
    padding: 0;
}

/* 下载按钮样式 */
.download-btn {
    transition: all 0.3s ease;
    text-decoration: none;
    border: none;
    outline: none;
}

.download-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.download-btn:active {
    transform: translateY(0) scale(1.02);
}

/* 性能优化 */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .auto-dark {
        color-scheme: dark;
    }
}

/* 减少动画偏好支持 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .gradient-text {
        background: none;
        color: #000;
    }
}

/* WebP图片回退 */
.no-webp .webp-image {
    background-image: url('fallback.jpg');
}

/* 加载状态 */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #4361EE;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}