/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    background-attachment: fixed;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    color: white;
    padding-top: var(--navbar-height, 70px);
    margin: 0;
    padding-bottom: 0;
    position: relative;
}

html, body { overflow-x: hidden; }

/* 确保页面底部被完全覆盖 */
body::after {
    content: '';
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    /* 隐藏全局固定渐变：仅在页脚显示渐变 */
    z-index: -1;
    pointer-events: none;
}

/* 宽屏自适应容器：限制过宽带来的稀疏感，并在超宽屏下保持视觉集中 */
.container,
.container-fluid {
    max-width: 1600px;
}

@media (min-width: 1600px) {
    .container,
    .container-fluid {
        max-width: 1800px;
    }
}

/* 英雄区在超宽屏下的两栏布局比例优化，内容居中 */
.hero-main .container,
.ai-features .container,
.three-steps .container,
.pricing-section .container,
.contact-section-new .container,
.cta-main-extended .container {
    max-width: 1440px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
}

/* 流式排版：大屏上适度放大字号，防止过大留白 */
@media (min-width: 1400px) {
    .hero-title { font-size: 60px; white-space: nowrap; }
    .hero-description { font-size: 20px; }
    .stat-number { font-size: 34px; }
}

/* 大屏适配：2K 显示器 */
@media (min-width: 1920px) {
    .container, .container-fluid,
    .hero-main .container,
    .ai-features .container,
    .three-steps .container,
    .pricing-section .container,
    .contact-section-new .container,
    .cta-main-extended .container { max-width: 1920px; }

    .hero-title { font-size: 68px; white-space: nowrap; }
    .hero-description { font-size: 22px; }
    .stat-number { font-size: 36px; }
    .stats-container { gap: 28px; }
    .process-card { max-width: 420px; }
}

/* 超大屏适配：4K 显示器 */
@media (min-width: 2560px) {
    .container, .container-fluid,
    .hero-main .container,
    .ai-features .container,
    .three-steps .container,
    .pricing-section .container,
    .contact-section-new .container,
    .cta-main-extended .container { max-width: 2200px; }

    .hero-title { font-size: 76px; white-space: nowrap; }
    .hero-description { font-size: 24px; }
    .stat-number { font-size: 40px; }
    .stats-container { gap: 32px; }
    .process-card { max-width: 460px; }
}

/* 小屏（13"/14" 笔记本，1280 级别）适配 */
@media (max-width: 1280px) {
    .hero-title { font-size: 50px; white-space: nowrap; }
    .hero-description { font-size: 16px; }
    .stat-number { font-size: 28px; }
    .process-card { max-width: 360px; }
}

/* 中等屏幕断点优化 */
@media (max-width: 1024px) {
    .stats-container {
        gap: 20px;
    }
    
    .stat-box {
        flex: 1 1 360px;
        max-width: 420px;
        min-width: 260px;
    }
}

@media (max-width: 900px) {
    .stats-container {
        gap: 16px;
    }
    
    .stat-box {
        flex: 1 1 340px;
        max-width: 380px;
        min-width: 240px;
    }
}

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.1) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 15px 0;
    transition: all 0.3s ease-in-out;
    z-index: 1000; /* 降低层级，避免遮挡modal */
}

/* 滚动时的导航栏样式 */
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.99) !important;
    backdrop-filter: blur(25px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.15);
    box-shadow: 0 6px 32px rgba(0, 0, 0, 0.2);
}

/* 深色背景时的导航栏样式 */
.navbar.dark-bg {
    background: rgba(255, 255, 255, 0.1) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
    color: white !important;
    font-weight: 700;
    transition: color 0.3s ease;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.navbar.scrolled .navbar-brand,
.navbar.light-bg .navbar-brand {
    color: #0f172a !important;
    text-shadow: none;
    font-weight: 800;
}

.nav-link {
    color: rgba(255, 255, 255, 0.98) !important;
    font-size: clamp(14px, 1.2vw, 16px);
    font-weight: 600;
    cursor: pointer;
    transition: color 0.3s ease;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* 防止不同系统/缩放下导航链接换行导致高度变化 */
.navbar .navbar-nav { flex-wrap: nowrap; }

.navbar.scrolled .nav-link,
.navbar.light-bg .nav-link {
    color: #0f172a !important;
    text-shadow: none;
    font-weight: 600;
}

.nav-link:hover {
    color: white !important;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
}

.navbar.scrolled .nav-link:hover,
.navbar.light-bg .nav-link:hover {
    color: #667eea !important;
    text-shadow: none;
}

.user-info {
    color: rgba(255, 255, 255, 0.98);
    font-size: 16px;
    font-weight: 600;
    transition: color 0.3s ease;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.navbar.scrolled .user-info,
.navbar.light-bg .user-info {
    color: #0f172a;
    text-shadow: none;
    font-weight: 600;
}

.btn-outline-light {
    border-color: rgba(255, 255, 255, 0.95);
    color: white;
    font-size: 15px;
    font-weight: 600;
    padding: 8px 18px;
    transition: all 0.3s ease;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    border-width: 2px;
}

.navbar.scrolled .btn-outline-light,
.navbar.light-bg .btn-outline-light {
    border-color: #0f172a;
    color: #0f172a;
    text-shadow: none;
    font-weight: 600;
}

.navbar.scrolled .btn-outline-light:hover,
.navbar.light-bg .btn-outline-light:hover {
    background-color: #667eea;
    border-color: #667eea;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* 科技感颜色变量 */
:root {
    --tech-primary: #6366f1;
    --tech-secondary: #8b5cf6;
    --tech-accent: #06b6d4;
    --tech-success: #10b981;
    --tech-warning: #f59e0b;
    --tech-dark: #0f172a;
    --tech-light: #f8fafc;
    --tech-gray: #64748b;
    --tech-gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --tech-gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --tech-gradient-accent: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --tech-gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --tech-gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    --tech-shadow: 0 8px 32px rgba(99, 102, 241, 0.15);
    --tech-shadow-hover: 0 16px 48px rgba(99, 102, 241, 0.25);
    --tech-shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
    --tech-shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.12);
    --tech-border: 1px solid rgba(255, 255, 255, 0.1);
    --tech-border-light: 1px solid rgba(0, 0, 0, 0.05);
    --tech-blur: blur(20px);
    --tech-blur-heavy: blur(40px);
}

/* 兼容性：WebKit(-webkit-backdrop-filter) 补充，避免 Safari/部分 Windows 浏览器毛玻璃失效 */
@supports (-webkit-backdrop-filter: blur(1px)) {
    .navbar { -webkit-backdrop-filter: blur(20px); }
    .navbar.scrolled { -webkit-backdrop-filter: blur(25px); }
    .stat-box { -webkit-backdrop-filter: blur(10px); }
    .demo-btn { -webkit-backdrop-filter: var(--tech-blur); }
    .demo-btn:hover { -webkit-backdrop-filter: var(--tech-blur-heavy); }
    .process-card { -webkit-backdrop-filter: blur(20px); }
    .user-dropdown { -webkit-backdrop-filter: blur(15px); }
    .user-dropdown-menu { -webkit-backdrop-filter: blur(20px); }
    .pricing-card { -webkit-backdrop-filter: blur(20px); }
    .popular-badge { -webkit-backdrop-filter: blur(10px); }
    .pricing-header { -webkit-backdrop-filter: blur(10px); }
    .cta-btn-extended { -webkit-backdrop-filter: blur(10px); }
    #loadingState .card { -webkit-backdrop-filter: blur(10px); }
    #resultsContainer .card { -webkit-backdrop-filter: blur(10px); }
}

/* 全局动画关键帧 */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

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

@keyframes glow {
    0%, 100% { 
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.3), 0 8px 32px rgba(0, 0, 0, 0.1);
    }
    50% { 
        box-shadow: 0 0 40px rgba(99, 102, 241, 0.6), 0 16px 48px rgba(0, 0, 0, 0.2);
    }
}

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

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 主页面英雄区域 */
.hero-main {
    padding: 80px 0; /* 将标题更贴近板块顶部，避免出现大块留白 */
    position: relative;
    overflow: visible; /* 允许阴影和发光效果完整显示，不被裁剪 */
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--tech-gradient-hero);
    position: relative;
}

.hero-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(139, 92, 246, 0.4) 0%, transparent 60%),
        radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.4) 0%, transparent 60%),
        radial-gradient(circle at 40% 40%, rgba(6, 182, 212, 0.3) 0%, transparent 60%),
        radial-gradient(circle at 60% 60%, rgba(240, 147, 251, 0.2) 0%, transparent 60%);
    pointer-events: none;
    filter: blur(2px);
    animation: pulse 8s ease-in-out infinite;
}

.hero-main::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="8" height="8" patternUnits="userSpaceOnUse"><path d="M 8 0 L 0 0 0 8" fill="none" stroke="%23ffffff" stroke-width="0.05" opacity="0.15"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>'),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="200" height="200" fill="url(%23dots)"/></svg>');
    opacity: 0.35;
    pointer-events: none;
}

.min-vh-75 {
    min-height: 75vh;
}

.hero-content {
    padding-right: 0px;
    position: relative;
    z-index: 15;
}

.hero-title {
    font-size: 56px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 30px;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    white-space: normal;
    overflow: visible;
    background-clip: text;
    position: relative;
    z-index: 10;
}

.hero-description {
    font-size: 18px;
    line-height: 1.7;
    margin-bottom: 50px;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 400;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    /* 移除动画效果 */
}

/* 统计数据容器 */
.stats-container {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    margin-bottom: 60px;
    position: relative;
    z-index: 2;
    /* 移除动画效果 */
    visibility: visible;
    opacity: 1;
    justify-content: center;
}

.stat-box {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 28px;
    padding: 40px 40px 36px 36px;
    text-align: center;
    min-width: 300px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    flex: 1 1 400px;
    max-width: 500px;
    position: relative;
    overflow: visible;
    animation: fadeInScale 0.8s ease-out;
    box-shadow: none;
}

.stat-box:nth-child(1) { 
    animation-delay: 0.5s; 
    border-left: 3px solid rgba(34, 197, 94, 0.6);
}
.stat-box:nth-child(2) { 
    animation-delay: 0.6s; 
    border-left: 3px solid rgba(59, 130, 246, 0.6);
}
.stat-box:nth-child(3) { 
    animation-delay: 0.7s; 
    border-left: 3px solid rgba(168, 85, 247, 0.6);
}
.stat-box:nth-child(4) { 
    animation-delay: 0.8s; 
    border-left: 3px solid rgba(245, 158, 11, 0.6);
}

.stat-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    transition: left 0.8s ease;
}

.stat-box:hover::before {
    left: 100%;
}

.stat-box:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.22) 0%, rgba(255, 255, 255, 0.14) 100%);
    transform: translateY(-8px) scale(1.03);
    box-shadow: none;
    border-color: rgba(255, 255, 255, 0.45);
}

.stat-number {
    font-size: 32px;
    font-weight: 900;
    color: white;
    line-height: 1;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
    text-shadow: none;
    position: relative;
    z-index: 1;
    display: block;
    visibility: visible;
    opacity: 1;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    white-space: nowrap;
    max-width: 100%;
    overflow: visible;
    text-overflow: visible;
    background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-variant-numeric: tabular-nums;
    padding-right: 6px;
}

.stat-text {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 600;
    letter-spacing: 0.03em;
    text-shadow: none;
    position: relative;
    z-index: 1;
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    line-height: 1.3;
    max-width: 100%;
    text-transform: uppercase;
    font-size: 13px;
}

/* 英雄区按钮 */
.hero-buttons {
    display: flex;
    gap: 24px;
    position: relative;
    z-index: 2;
    /* 移除动画效果 */
}

.start-btn {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    color: var(--tech-primary);
    border: none;
    padding: 20px 48px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 16px;
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.3);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
}

.start-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.6s ease;
}

.start-btn:hover::before {
    left: 100%;
}

.start-btn:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 20px 48px rgba(255, 255, 255, 0.4);
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
    color: var(--tech-primary);
}

.demo-btn {
    border: 2px solid rgba(255, 255, 255, 0.9);
    color: white;
    padding: 18px 48px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 16px;
    background: transparent;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.02em;
    backdrop-filter: var(--tech-blur);
    position: relative;
    overflow: hidden;
}

.demo-btn::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 0.6s ease;
}

.demo-btn:hover::before {
    left: 100%;
}

.demo-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: white;
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 20px 48px rgba(255, 255, 255, 0.3);
    backdrop-filter: var(--tech-blur-heavy);
}

/* 右侧流程卡片 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.process-card {
    background: rgba(255, 255, 255, 0.98);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.12);
    max-width: 380px;
    width: 100%;
    position: relative;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* 蓝色智能课程生成按钮 */
.smart-course-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 20px;
    border-radius: 16px;
    font-weight: 600;
    font-size: 15px;
    text-align: center;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* 绿色完成指示器 */
.completion-indicator {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 32px;
    height: 32px;
    background: #4CAF50;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

/* 橙色视频图标 */
.video-icon {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: #FF9800;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    box-shadow: 0 4px 12px rgba(255, 152, 0, 0.3);
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 60px;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 12px;
    transition: all 0.3s ease;
    background: rgba(248, 249, 250, 0.9);
    border: 1px solid rgba(0, 0, 0, 0.02);
    position: relative;
}

/* 绿色侧边条 */
.step-item.green-border {
    border-left: 4px solid #4CAF50;
    background: rgba(76, 175, 80, 0.05);
}

/* 黄色侧边条 */
.step-item.yellow-border {
    border-left: 4px solid #FFC107;
    background: rgba(255, 193, 7, 0.05);
}

/* 红色侧边条 */
.step-item.red-border {
    border-left: 4px solid #F44336;
    background: rgba(244, 67, 54, 0.05);
}

.step-item.completed {
    position: relative;
}

.step-item.processing {
    position: relative;
}

.step-item:not(.completed):not(.processing) {
    background: rgba(158, 158, 158, 0.05);
    border: 1px solid rgba(158, 158, 158, 0.1);
}

.step-check {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: white;
    flex-shrink: 0;
    background: #4CAF50;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

.step-check.processing {
    background: #FFC107;
    box-shadow: 0 2px 8px rgba(255, 193, 7, 0.3);
    animation: pulse-processing 2s infinite;
}

@keyframes pulse-processing {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 2px 8px rgba(255, 193, 7, 0.3);
    }
    50% { 
        transform: scale(1.1);
        box-shadow: 0 4px 16px rgba(255, 193, 7, 0.5);
    }
}

.step-item span {
    color: #495057;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: -0.01em;
    flex: 1;
}

/* AI功能区域 */
.ai-features {
    padding: 100px 0;
    background: var(--tech-light);
    position: relative;
    overflow: hidden;
    color: var(--tech-dark);
}

.ai-features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.features-main-title {
    font-size: 42px;
    font-weight: 800;
    color: #2c3e50;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.features-main-subtitle {
    font-size: 18px;
    color: #64748b;
    margin-bottom: 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
    position: relative;
    z-index: 2;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 16px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.feature-card-new {
    background: white;
    border-radius: 24px;
    padding: 50px 30px 40px;
    text-align: center;
    height: 100%;
    box-shadow: var(--tech-shadow);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    z-index: 2;
    overflow: hidden;
}

.feature-card-new::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--tech-gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.feature-card-new:hover::before {
    transform: scaleX(1);
}

.feature-card-new:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--tech-shadow-hover);
}

.feature-icon-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    font-size: 48px;
    color: white;
    position: relative;
    background: var(--tech-gradient-primary);
    box-shadow: 0 15px 35px rgba(99, 102, 241, 0.3);
    transition: all 0.3s ease;
}

.feature-card-new:hover .feature-icon-circle {
    transform: scale(1.1);
    box-shadow: 0 20px 45px rgba(99, 102, 241, 0.4);
}

.feature-icon-circle.blue {
    background: var(--tech-gradient-primary);
    box-shadow: 0 15px 35px rgba(99, 102, 241, 0.3);
}

.feature-icon-circle.green {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    box-shadow: 0 15px 35px rgba(76, 175, 80, 0.3);
}

.feature-icon-circle.orange {
    background: linear-gradient(135deg, #FF9800 0%, #FF8F00 100%);
    box-shadow: 0 15px 35px rgba(255, 152, 0, 0.3);
}

.feature-icon-circle.purple {
    background: linear-gradient(135deg, #9C27B0 0%, #7B1FA2 100%);
    box-shadow: 0 15px 35px rgba(156, 39, 176, 0.3);
}

.feature-title-new {
    font-size: 24px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
    line-height: 1.3;
}

.feature-desc-new {
    font-size: 16px;
    color: #64748b;
    line-height: 1.8;
    margin: 0;
}

/* 保留旧样式以免破坏其他页面 */
.ai-feature-card {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    height: 100%;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.ai-feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon-wrapper {
    width: 80px;
    height: 80px;
    background: #667eea;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 32px;
    color: white;
}

.feature-icon-wrapper.green {
    background: #4CAF50;
}

.feature-icon-wrapper.orange {
    background: #FF9800;
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
}

.feature-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 三步流程区域 */
.three-steps {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 50%, #fce4ec 100%);
    color: #333;
    position: relative;
    overflow: hidden;
}

.three-steps::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHZpZXdCb3g9IjAgMCA0MCA0MCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPGNpcmNsZSBjeD0iMjAiIGN5PSIyMCIgcj0iMSIgZmlsbD0icmdiYSgyNTUsIDI1NSwgMjU1LCAwLjEpIi8+Cjwvc3ZnPg==') repeat;
    opacity: 0.3;
}

.steps-main-title {
    font-size: 42px;
    font-weight: 800;
    color: #2c3e50;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.steps-main-subtitle {
    font-size: 18px;
    color: #64748b;
    margin-bottom: 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
    position: relative;
    z-index: 2;
}

.step-card-main {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    height: 100%;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.step-card-main:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.step-number-main {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    background: #667eea;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.step-number-main.green {
    background: #4CAF50;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.step-number-main.orange {
    background: #FF9800;
    box-shadow: 0 4px 15px rgba(255, 152, 0, 0.3);
}

.step-title-main {
    font-size: 20px;
    font-weight: 600;
    color: #333;
    margin: 30px 0 15px;
}

.step-desc-main {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 30px;
}

.step-bottom-icon {
    font-size: 32px;
    color: #667eea;
    opacity: 0.3;
}

.step-bottom-icon.green {
    color: #4CAF50;
}

.step-bottom-icon.orange {
    color: #FF9800;
}

/* 新的步骤卡片样式 */
.step-card-new {
    background: white;
    border-radius: 24px;
    padding: 50px 30px 40px;
    text-align: center;
    height: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    z-index: 2;
}

.step-card-new:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.15);
}

.step-number-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    font-size: 32px;
    font-weight: 800;
    color: white;
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.3);
}

.step-number-circle.blue {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.3);
}

.step-number-circle.green {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    box-shadow: 0 15px 35px rgba(76, 175, 80, 0.3);
}

.step-number-circle.orange {
    background: linear-gradient(135deg, #FF9800 0%, #FF8F00 100%);
    box-shadow: 0 15px 35px rgba(255, 152, 0, 0.3);
}

.step-number-circle.purple {
    background: linear-gradient(135deg, #9C27B0 0%, #7B1FA2 100%);
    box-shadow: 0 15px 35px rgba(156, 39, 176, 0.3);
}

.step-title-new {
    font-size: 24px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
    line-height: 1.3;
}

.step-desc-new {
    font-size: 16px;
    color: #64748b;
    line-height: 1.8;
    margin-bottom: 30px;
}

.step-icon-bottom {
    font-size: 40px;
    opacity: 0.15;
    color: #667eea;
    transition: all 0.3s ease;
}

.step-icon-bottom.blue {
    color: #667eea;
}

.step-icon-bottom.green {
    color: #4CAF50;
}

.step-icon-bottom.orange {
    color: #FF9800;
}

.step-icon-bottom.purple {
    color: #9C27B0;
}

.step-card-new:hover .step-icon-bottom {
    opacity: 0.3;
    transform: scale(1.1);
}

/* CTA区域 */
.cta-main {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.cta-title {
    font-size: 36px;
    font-weight: 700;
    color: white;
    margin-bottom: 15px;
}

.cta-subtitle {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons-main {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-buttons-main .btn {
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: white;
    padding: 15px 30px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    background: transparent;
    transition: all 0.3s ease;
}

.cta-buttons-main .btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.2);
}

/* 价格方案区域 */
.pricing-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 50%, #cbd5e1 100%);
    color: #1f2937;
    position: relative;
    overflow: hidden;
}

.pricing-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    z-index: 0;
}

.pricing-section .container {
    position: relative;
    z-index: 1;
}

.pricing-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 24px;
    padding: 0;
    text-align: left;
    position: relative;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(20px);
    max-width: 360px;
    margin: 0 auto;
}

.pricing-card:hover {
    transform: translateY(-16px) scale(1.02);
    box-shadow: 0 32px 80px rgba(0, 0, 0, 0.15);
    border-color: rgba(99, 102, 241, 0.3);
    background: rgba(255, 255, 255, 0.98);
}

.pricing-card.pro {
    border: 2px solid #6366f1;
    transform: scale(1.05);
    position: relative;
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.2);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.02) 0%, rgba(255, 255, 255, 0.98) 100%);
}

.pricing-card.pro:hover {
    transform: scale(1.05) translateY(-16px);
    box-shadow: 0 40px 100px rgba(99, 102, 241, 0.3);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(255, 255, 255, 0.98) 100%);
}

.pricing-card.enterprise {
    border: 2px solid #059669;
    box-shadow: 0 20px 60px rgba(5, 150, 105, 0.2);
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.02) 0%, rgba(255, 255, 255, 0.98) 100%);
}

.pricing-card.enterprise:hover {
    transform: translateY(-16px) scale(1.02);
    box-shadow: 0 40px 100px rgba(5, 150, 105, 0.3);
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.05) 0%, rgba(255, 255, 255, 0.98) 100%);
}

.popular-badge {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    padding: 12px 32px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.8px;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.5);
    z-index: 10;
    text-transform: uppercase;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.pricing-header {
    padding: 32px 28px 28px;
    text-align: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.8) 0%, rgba(248, 250, 252, 0.9) 100%);
    backdrop-filter: blur(10px);
}

.pricing-title {
    font-size: 24px;
    font-weight: 900;
    color: #1f2937;
    margin-bottom: 18px;
    letter-spacing: -0.8px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.pricing-price {
    margin-bottom: 16px;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 6px;
}

.price-symbol {
    font-size: 22px;
    color: #6366f1;
    font-weight: 700;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.price-number {
    font-size: 48px;
    font-weight: 900;
    color: #6366f1;
    line-height: 1;
    letter-spacing: -1.5px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    text-shadow: 0 2px 4px rgba(99, 102, 241, 0.1);
}

.price-period {
    font-size: 18px;
    color: #6b7280;
    font-weight: 600;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.pricing-description {
    font-size: 15px;
    color: #6b7280;
    margin: 0;
    line-height: 1.6;
    font-weight: 500;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* 功能列表 */
.pricing-features {
    padding: 28px;
    flex: 1;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(5px);
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    padding: 14px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.03);
    gap: 14px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    transition: all 0.2s ease;
}

.feature-item:last-child {
    border-bottom: none;
}

.feature-item.disabled {
    opacity: 0.4;
}

.feature-check {
    color: #10b981;
    font-size: 20px;
    width: 22px;
    flex-shrink: 0;
    margin-top: 2px;
    filter: drop-shadow(0 1px 2px rgba(16, 185, 129, 0.2));
}

.feature-cross {
    color: #ef4444;
    font-size: 18px;
    width: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.feature-item span {
    font-size: 15px;
    color: #374151;
    font-weight: 500;
    line-height: 1.6;
    flex: 1;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* 价格行动按钮 */
.pricing-action {
    padding: 28px;
    text-align: center;
    margin-top: auto;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.8) 0%, rgba(248, 250, 252, 0.9) 100%);
    border-top: 1px solid rgba(0, 0, 0, 0.04);
    backdrop-filter: blur(10px);
}

.pricing-action .btn {
    font-size: 16px;
    font-weight: 800;
    padding: 16px 32px;
    border-radius: 12px;
    transition: all 0.3s ease;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.pricing-action .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.trial-text {
    margin-top: 12px;
    font-size: 13px;
    color: #6b7280;
    margin-bottom: 0;
    font-weight: 500;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}



/* 企业版特殊样式 */
.pricing-card.enterprise .price-number,
.pricing-card.enterprise .price-symbol {
    color: #374151;
}

.pricing-card.free .price-number,
.pricing-card.free .price-symbol {
    color: #059669;
}

/* 价格方案标题样式优化 */
.pricing-section .section-header {
    text-align: center;
    margin-bottom: 60px;
}

.pricing-section .section-title {
    font-size: 48px;
    font-weight: 900;
    color: #1f2937;
    margin-bottom: 20px;
    letter-spacing: -1.5px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.pricing-section .section-subtitle {
    font-size: 18px;
    color: #6b7280;
    font-weight: 500;
    line-height: 1.6;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* 主要功能区域（保持原有样式） */
.main-card {
    border: none;
    border-radius: 25px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
    transition: all 0.3s ease-in-out;
    backdrop-filter: blur(15px);
    background: rgba(255, 255, 255, 0.98);
    margin-bottom: 2rem;
}

.main-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 50px rgba(0,0,0,0.15);
}

.main-card .card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 25px 25px 0 0;
    padding: 1.5rem 2rem;
    font-weight: 600;
    color: white;
}

.main-card .card-body {
    padding: 2rem;
    border-radius: 0 0 25px 25px;
}

/* 按钮样式 */
.btn {
    border-radius: 25px;
    padding: 10px 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #56ab2f 0%, #a8e6cf 100%);
    border: none;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(86, 171, 47, 0.4);
}

/* 上传区域 */
.upload-area {
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area:hover {
    border-color: #667eea !important;
    background: linear-gradient(135deg, #667eea, #764ba2) !important;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.3);
}

.upload-area:hover i {
    color: white !important;
    animation: bounce 0.6s ease-in-out;
}

@keyframes bounce {
    0%, 20%, 60%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    80% {
        transform: translateY(-5px);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-main {
        padding: 60px 0;
        min-height: auto;
    }
    
    .min-vh-75 {
        min-height: auto;
    }
    
    .hero-title {
        font-size: 40px;
        margin-bottom: 20px;
        white-space: normal;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 40px;
        text-align: center;
    }
    
    .hero-description {
        font-size: 15px;
        margin-bottom: 32px;
    }
    
    .stats-container {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 12px;
        margin-bottom: 36px;
        justify-content: center;
    }
    
    .stat-box {
        padding: 24px 20px;
        min-width: 220px;
        flex: 1 1 260px;
        max-width: 300px;
    }
    
    .stat-number {
        font-size: 22px;
    }
    
    .stat-text {
        font-size: 12px;
        line-height: 1.2;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    
    .start-btn, .demo-btn {
        width: 100%;
        max-width: 320px;
        padding: 16px 32px;
        font-size: 14px;
    }
    
    .process-card {
        margin-top: 0;
        max-width: 100%;
        padding: 20px;
    }
    
    .smart-course-button {
        padding: 10px 16px;
        font-size: 14px;
        margin-bottom: 16px;
    }
    
    .completion-indicator {
        width: 28px;
        height: 28px;
        font-size: 12px;
        top: 16px;
        right: 16px;
    }
    
    .video-icon {
        width: 36px;
        height: 36px;
        font-size: 14px;
        bottom: 16px;
        right: 16px;
    }
    
    .process-steps {
        gap: 10px;
        margin-bottom: 50px;
    }
    
    .step-item {
        padding: 10px 12px;
        gap: 10px;
    }
    
    .step-check {
        width: 18px;
        height: 18px;
        font-size: 9px;
    }
    
    .step-item span {
        font-size: 13px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .cta-title {
        font-size: 28px;
    }
    
    .cta-buttons-main {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons-main .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .pricing-card {
        margin: 20px 0;
    }
    
    .pricing-card.pro {
        transform: none;
        margin-top: 30px;
    }
    
    .pricing-header {
        padding: 24px 24px 20px;
    }
    
    .pricing-features {
        padding: 20px 24px;
    }
    
    .pricing-action {
        padding: 20px 24px 24px;
    }
    
    .pricing-faq {
        padding: 24px;
    }
    
    .pricing-notes {
        margin-top: 40px;
    }
}

@media (max-width: 480px) {
    .hero-main {
        padding: 40px 0;
    }
    
    .hero-title {
        font-size: 32px;
        line-height: 1.1;
        white-space: normal;
    }
    
    .hero-description {
        font-size: 14px;
    }
    
    .stats-container {
        gap: 8px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .stat-box {
        padding: 20px 16px;
        min-width: 200px;
        flex: 1 1 240px;
        max-width: 260px;
    }
    
    .stat-number {
        font-size: 18px;
    }
    
    .stat-text {
        font-size: 11px;
        line-height: 1.2;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
    
    .start-btn, .demo-btn {
        padding: 14px 28px;
        font-size: 13px;
    }
    
    .process-card {
        padding: 16px;
        border-radius: 20px;
    }
    
    .smart-course-button {
        padding: 8px 12px;
        font-size: 13px;
        margin-bottom: 12px;
    }
    
    .completion-indicator {
        width: 24px;
        height: 24px;
        font-size: 10px;
        top: 12px;
        right: 12px;
    }
    
    .video-icon {
        width: 32px;
        height: 32px;
        font-size: 12px;
        bottom: 12px;
        right: 12px;
    }
    
    .process-steps {
        gap: 8px;
        margin-bottom: 40px;
    }
    
    .step-item {
        padding: 8px 12px;
        border-radius: 10px;
        gap: 8px;
    }
    
    .step-check {
        width: 16px;
        height: 16px;
        font-size: 8px;
    }
    
    .step-item span {
        font-size: 12px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .cta-title {
        font-size: 24px;
    }
    
    .ai-feature-card,
    .step-card-main {
        padding: 30px 20px;
    }
    
    .feature-icon-wrapper {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
    
    .step-number-main {
        width: 40px;
        height: 40px;
        font-size: 16px;
        top: -20px;
    }
    
    .step-bottom-icon {
        font-size: 24px;
    }
    
    .pricing-header {
        padding: 20px 20px 16px;
    }
    
    .pricing-title {
        font-size: 20px;
    }
    
    .price-number {
        font-size: 36px;
    }
    
    .pricing-features {
        padding: 16px 20px;
    }
    
    .feature-item {
        padding: 10px 0;
    }
    
    .pricing-action {
        padding: 16px 20px 20px;
    }
    
    .pricing-faq {
        padding: 20px;
    }
    
    .popular-badge {
        padding: 6px 16px;
        font-size: 12px;
    }
}

/* 动画效果 */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.process-card {
    animation: float 6s ease-in-out infinite;
}

/* 成功动画效果 */
.success-animation {
    animation: pulse 0.6s ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* 淡入效果 */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 上传区域拖拽效果增强 */
.upload-area.dragover {
    border-color: #28a745 !important;
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%) !important;
    transform: scale(1.02);
    color: #155724 !important;
}

.upload-area.success-flash {
    animation: successFlash 1s ease-in-out;
}

@keyframes successFlash {
    0%, 100% { background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%); }
    50% { background: linear-gradient(135deg, #28a745 0%, #20c997 100%); }
}

/* 音频播放状态 */
.audio-playing {
    background-color: #28a745 !important;
    border-color: #28a745 !important;
    animation: audioPlaying 1.5s ease-in-out infinite;
}

@keyframes audioPlaying {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* 页面过渡效果 - 已禁用 */
.page-transition {
    /* 移除动画效果 */
}

@keyframes pageSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 统计项样式 */
.stat-item {
    padding: 1rem;
    border-radius: 10px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    margin-bottom: 1rem;
}

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

/* 演讲备注内容样式 */
.speech-notes-content {
    line-height: 1.8;
    font-size: 1.1rem;
    color: #495057;
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid #007bff;
}

/* 结果容器样式 */
#resultsContainer {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
    color: #333;
}

#resultsContainer .card {
    border: none;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    border-radius: 15px;
}

#resultsContainer .card-header {
    border-bottom: none;
    border-radius: 15px 15px 5px 5px !important;
}

/* 错误和加载状态样式 */
#loadingState .card {
    border: none;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: #333;
}

#errorContainer .alert {
    background: rgba(248, 215, 218, 0.95);
    border: none;
    color: #721c24;
}

/* 通知动画 */
@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideOutToRight {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

/* 新的按钮组样式 */
.action-buttons-card {
    border: none;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
    border-radius: 20px;
    overflow: hidden;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
}

.bg-gradient-warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%) !important;
}

.action-section {
    border-radius: 15px;
    background: rgba(248, 249, 250, 0.8);
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.action-section:last-child {
    margin-bottom: 0;
}

.section-title {
    font-size: 1rem;
    font-weight: 600;
    color: #495057;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e9ecef;
}

.btn-action {
    position: relative;
    padding: 1rem 1.5rem;
    height: auto;
    min-height: 80px;
    display: flex;
    align-items: center;
    text-align: left;
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    overflow: hidden;
}

.btn-action:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.btn-action i {
    font-size: 1.5rem;
    margin-right: 1rem;
    flex-shrink: 0;
}

.btn-content {
    flex: 1;
}

.btn-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    line-height: 1.2;
}

.btn-desc {
    font-size: 0.85rem;
    opacity: 0.8;
    line-height: 1.3;
}

/* 进度卡片样式 */
.progress-card {
    border: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-radius: 20px;
    overflow: hidden;
}

.progress-spinner {
    margin-bottom: 1rem;
}

.progress-spinner .spinner-border {
    width: 3rem;
    height: 3rem;
    border-width: 0.3em;
}

.progress-container {
    background: rgba(248, 249, 250, 0.8);
    padding: 1.5rem;
    border-radius: 15px;
    margin-bottom: 1.5rem;
}

.progress-lg {
    height: 12px;
    border-radius: 10px;
}

.progress-lg .progress-bar {
    border-radius: 10px;
}

/* 处理步骤样式 */
.processing-steps {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.step-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    background: rgba(248, 249, 250, 0.6);
    border-radius: 10px;
    border-left: 4px solid #e9ecef;
    transition: all 0.3s ease;
}

.step-item.active {
    background: rgba(102, 126, 234, 0.1);
    border-left-color: #667eea;
}

.step-item.completed {
    background: rgba(40, 167, 69, 0.1);
    border-left-color: #28a745;
}

.step-item.completed .step-icon {
    color: #28a745;
}

.step-icon {
    font-size: 1rem;
    margin-right: 0.75rem;
    color: #6c757d;
    flex-shrink: 0;
    width: 20px;
    text-align: center;
}

.step-text {
    font-size: 0.95rem;
    color: #495057;
    font-weight: 500;
}

/* 成功状态样式 */
.success-card {
    border: none;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(40, 167, 69, 0.2);
}

.success-card .card-header {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%) !important;
    border: none;
    border-radius: 20px 20px 0 0;
}

/* 响应式设计增强 */
@media (max-width: 768px) {
    .stat-item h3 {
        font-size: 2rem;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .btn-group .btn {
        margin-bottom: 0.5rem;
        border-radius: 25px !important;
    }
    
    #resultsContainer {
        padding: 1rem;
        margin-top: 1rem;
    }
    
    .speech-notes-content {
        font-size: 1rem;
        padding: 1rem;
    }
    
    .action-section {
        padding: 1rem;
    }
    
    .btn-action {
        min-height: 70px;
        padding: 0.75rem 1rem;
    }
    
    .btn-action i {
        font-size: 1.25rem;
        margin-right: 0.75rem;
    }
    
    .btn-title {
        font-size: 0.9rem;
    }
    
    .btn-desc {
        font-size: 0.8rem;
    }
    
    .progress-container {
        padding: 1rem;
    }
    
    .processing-steps {
        gap: 0.75rem;
    }
    
    .step-item {
        padding: 0.5rem 0.75rem;
    }
}

@media (max-width: 576px) {
    .row.g-3 > * {
        margin-bottom: 1rem;
    }
    
    .col-md-6 {
        width: 100%;
    }
    
    .btn-action {
        flex-direction: column;
        text-align: center;
        min-height: 60px;
        padding: 1rem;
    }
    
    .btn-action i {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }
}

/* 新联系我们区域样式 */
.contact-section-new {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e3f2fd 50%, #f3e5f5 100%);
    position: relative;
    overflow: hidden;
}

.contact-section-new::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHZpZXdCb3g9IjAgMCA0MCA0MCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPGNpcmNsZSBjeD0iMjAiIGN5PSIyMCIgcj0iMSIgZmlsbD0icmdiYSgyNTUsIDI1NSwgMjU1LCAwLjEpIi8+Cjwvc3ZnPg==') repeat;
    opacity: 0.3;
}

.contact-main-title {
    font-size: 42px;
    font-weight: 800;
    color: #2c3e50;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-main-subtitle {
    font-size: 18px;
    color: #64748b;
    margin-bottom: 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
    position: relative;
    z-index: 2;
}

.contact-card-new {
    background: white;
    border-radius: 24px;
    padding: 40px 30px;
    text-align: center;
    height: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    z-index: 2;
}

.contact-card-new:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.15);
}

.contact-icon-new {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 32px;
    color: white;
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.3);
}

.contact-icon-new.email {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.3);
}

.contact-icon-new.phone {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    box-shadow: 0 15px 35px rgba(76, 175, 80, 0.3);
}

.contact-icon-new.location {
    background: linear-gradient(135deg, #FF9800 0%, #FF8F00 100%);
    box-shadow: 0 15px 35px rgba(255, 152, 0, 0.3);
}

.contact-title-new {
    font-size: 22px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 15px;
    line-height: 1.3;
}

.contact-info-new {
    font-size: 16px;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 25px;
    font-weight: 500;
}

.contact-action-btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.2);
}

.contact-action-btn:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.3);
    text-decoration: none;
}



/* 响应式设计 */
@media (max-width: 768px) {
    .contact-main-title {
        font-size: 32px;
    }
    
    .contact-main-subtitle {
        font-size: 16px;
        padding: 0 20px;
    }
    
    .contact-card-new {
        padding: 30px 25px;
        margin-bottom: 20px;
    }
    
    .contact-icon-new {
        width: 70px;
        height: 70px;
        font-size: 28px;
    }
    
    .contact-title-new {
        font-size: 20px;
    }
    
    .contact-info-new {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .contact-section-new {
        padding: 80px 0;
    }
    
    .contact-main-title {
        font-size: 28px;
    }
    
    .contact-card-new {
        padding: 25px 20px;
    }
    
    .contact-icon-new {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
    
    .contact-action-btn {
        padding: 10px 20px;
        font-size: 13px;
    }
}

/* Voice Selection Modal Styles */
.voice-selection-container {
    max-height: 60vh;
    overflow-y: auto;
}

.voice-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.voice-option {
    transition: all 0.3s ease;
}

.voice-card {
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 1rem;
    background: #f8f9fa;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.voice-card:hover {
    border-color: #667eea;
    background: #ffffff;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
    transform: translateY(-2px);
}

.voice-card:has(input:checked) {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

.voice-card:has(input:checked) .text-muted {
    color: rgba(255, 255, 255, 0.8) !important;
}

.voice-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.voice-card:has(input:checked) .voice-avatar {
    background: rgba(255, 255, 255, 0.2) !important;
    color: white !important;
}

/* 兼容性回退：Firefox 等不支持 :has() 时使用类名控制选中态 */
.voice-card.is-checked {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}
.voice-card.is-checked .text-muted {
    color: rgba(255, 255, 255, 0.8) !important;
}
.voice-card.is-checked .voice-avatar {
    background: rgba(255, 255, 255, 0.2) !important;
    color: white !important;
}

.voice-upload-actions,
.voice-record-actions,
.voice-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.voice-section-header {
    border-bottom: 2px solid #e9ecef;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

/* Voice Cloning Progress Modal */
.progress {
    height: 8px;
    border-radius: 20px;
    overflow: hidden;
}

.progress-bar {
    border-radius: 20px;
    transition: width 0.6s ease;
}

/* Recording Animation */
@keyframes recording-pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.recording-indicator {
    animation: recording-pulse 1.5s infinite;
}

/* Voice Selection Styles */
.voice-card.selected {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 2px solid #0ea5e9;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(14, 165, 233, 0.15);
}

.voice-card.selected .text-muted {
    color: #0ea5e9 !important;
}

.voice-card.selected .voice-avatar {
    background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%) !important;
}

/* Button Hover Effects */
.btn-outline-primary:hover,
.btn-outline-success:hover,
.btn-outline-warning:hover,
.btn-outline-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* Modal Enhancements */
.modal {
    z-index: 1055 !important; /* Bootstrap默认1050，确保高于导航栏1000 */
}

.modal-dialog {
    margin-top: 100px !important; /* 向下移动，避免与导航栏重叠，留出足够间距 */
}

/* 响应式调整 */
@media (max-width: 768px) {
    .modal-dialog {
        margin-top: 80px !important; /* 移动端减少间距 */
    }
}

@media (max-width: 576px) {
    .modal-dialog {
        margin-top: 60px !important; /* 小屏幕进一步减少间距 */
    }
}

.modal-backdrop {
    z-index: 1050 !important;
}

.modal-header.bg-gradient-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
}

.modal-header.bg-gradient-success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%) !important;
}

/* File Upload Info */
#voiceUploadInfo .alert,
#recordingInfo .alert {
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
    border-left: 4px solid #2196f3;
}

#recordingInfo .alert-success {
    background: linear-gradient(135deg, #e8f5e8 0%, #f1f8e9 100%);
    border-left-color: #4caf50;
}

#recordingInfo .alert-warning {
    background: linear-gradient(135deg, #fff3e0 0%, #fef7e0 100%);
    border-left-color: #ff9800;
}

/* Responsive Design */
@media (max-width: 768px) {
    .voice-actions {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .voice-upload-actions,
    .voice-record-actions {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .voice-avatar {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .voice-card {
        padding: 0.75rem;
    }
}

/* Loading States */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: 12px;
}

/* Voice Card Active State */
.voice-card.active {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.voice-card.active .text-muted {
    color: rgba(255, 255, 255, 0.8) !important;
}

/* Notification Enhancements */
.notification {
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border: none;
}

.notification.success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
}

.notification.error {
    background: linear-gradient(135deg, #dc3545 0%, #fd7e14 100%);
    color: white;
}

.notification.warning {
    background: linear-gradient(135deg, #ffc107 0%, #fd7e14 100%);
    color: #212529;
}

.notification.info {
    background: linear-gradient(135deg, #17a2b8 0%, #6f42c1 100%);
    color: white;
}

/* 扩展的CTA区域样式 */
.cta-main-extended {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.cta-main-extended::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.cta-title-extended {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: white;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 2;
}

.cta-subtitle-extended {
    font-size: 1.4rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3.5rem;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
    position: relative;
    z-index: 2;
}

.cta-buttons-extended {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
    max-width: 1400px;
    margin: 0 auto;
}

.cta-btn-extended {
    padding: 1.3rem 3.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.8);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    min-width: 220px;
    text-align: center;
}

.cta-btn-extended:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    color: white;
}

.cta-btn-extended i {
    font-size: 1.2rem;
    margin-right: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .cta-title-extended {
        font-size: 2.5rem;
    }
    
    .cta-subtitle-extended {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }
    
    .cta-buttons-extended {
        gap: 1rem;
        flex-direction: column;
        align-items: center;
    }
    
    .cta-btn-extended {
        width: 100%;
        max-width: 300px;
        padding: 0.8rem 2rem;
    }
}

@media (max-width: 480px) {
    .cta-title-extended {
        font-size: 2rem;
    }
    
    .cta-subtitle-extended {
        font-size: 1rem;
    }
    
    .cta-btn-extended {
        padding: 0.7rem 1.5rem;
        font-size: 1rem;
    }
}

/* 标准声音模型库样式 */
.voice-section-subheader {
    border-bottom: 1px solid #f3f4f6;
    padding-bottom: 8px;
    margin-bottom: 15px;
    margin-top: 20px;
}

.voice-section-subheader h6 {
    color: #6b7280;
    font-weight: 500;
    margin: 0;
    font-size: 0.9rem;
}

#voiceModelLibrary {
    background: #f9fafb;
    border-radius: 12px;
    padding: 20px;
    border: 1px solid #e5e7eb;
}

#voiceModelLibrary .voice-option:first-child {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e5e7eb;
}

/* 标准声音模型库中的AI标准音色特殊样式 */
#voiceModelLibrary .voice-option:first-child .voice-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 1px solid #0ea5e9;
}

#voiceModelLibrary .voice-option:first-child .voice-card:hover {
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(14, 165, 233, 0.15);
}

#voiceModelLibrary .voice-option:first-child .voice-avatar {
    background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%) !important;
}

/* 用户下拉菜单样式 */
.user-dropdown {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    max-width: 40px;
    max-height: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.user-dropdown::before { display: none; }

.user-dropdown:hover::before {
    opacity: 1;
}

.user-dropdown::after {
    display: none;
}

/* 覆盖Bootstrap下拉按钮的默认样式 */
.user-dropdown.dropdown-toggle {
    background-image: none;
    box-shadow: none;
}

.user-dropdown.dropdown-toggle:focus {
    box-shadow: none;
    outline: none;
}

.user-dropdown.dropdown-toggle:active {
    transform: translateY(0px) scale(0.98);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.user-dropdown:hover {
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.user-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    border: 0;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
    box-shadow: none;
    transition: all 0.3s ease;
}

.user-avatar::before { display: none; }

.user-dropdown:hover .user-avatar::before {
    opacity: 1;
}

.user-name {
    color: white;
    font-weight: 500;
    font-size: 14px;
}

.user-dropdown-menu {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    padding: 12px 0;
    min-width: 300px;
    margin-top: 12px;
    animation: dropdownFadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes dropdownFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.dropdown-header {
    padding: 16px 20px 12px;
    background: transparent;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    margin-bottom: 8px;
}

.user-info-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar-large {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    border: 3px solid rgba(102, 126, 234, 0.2);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.3);
    position: relative;
}

.user-avatar-large::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.1) 100%);
    border-radius: 50%;
    z-index: -1;
}

.user-details {
    flex: 1;
}

.user-name-large {
    font-weight: 600;
    color: #333;
    font-size: 16px;
    margin-bottom: 4px;
}

.user-email {
    color: #666;
    font-size: 14px;
    font-weight: 400;
}

.dropdown-divider {
    margin: 8px 0;
    border-color: rgba(0, 0, 0, 0.1);
}

.dropdown-item {
    padding: 12px 20px;
    color: #333;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.dropdown-item:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    transform: translateY(-1px);
}

.dropdown-item i {
    width: 20px;
    text-align: center;
    margin-right: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .user-dropdown {
        padding: 0;
        width: 36px;
        height: 36px;
        min-width: 36px;
        min-height: 36px;
        max-width: 36px;
        max-height: 36px;
    }
    
    .user-avatar {
        width: 26px;
        height: 26px;
        font-size: 14px;
    }
    
    .user-dropdown-menu {
        min-width: 260px;
    }
    
    .user-avatar-large {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .user-name-large {
        font-size: 15px;
    }
    
    .user-email {
        font-size: 13px;
    }
    
    .edit-notes-btn {
        font-size: 12px;
        padding: 4px 8px;
    }
    
    .slide-notes-edit .btn {
        font-size: 12px;
        padding: 4px 8px;
    }
}

/* 备注编辑功能样式 */
.slide-notes-edit textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
    font-size: 14px;
}

.edit-notes-btn {
    transition: all 0.3s ease;
}

.edit-notes-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.slide-notes-content.notes p {
    margin-bottom: 0;
    line-height: 1.8;
    color: #495057;
    white-space: pre-line;
}

.slide-notes-edit .btn {
    font-size: 13px;
    padding: 6px 12px;
}

/* Footer 样式 */
.footer-section {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 12px 0 16px 0;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    /* 确保内容位于任何背景装饰之上 */
    z-index: 10;
    overflow: visible;
    margin-bottom: 0;
    min-height: 48px;
    width: 100%;
    box-sizing: border-box;
    /* 始终显示页脚 */
    opacity: 1;
    transform: none;
    pointer-events: auto;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

/* 确保footer完全覆盖底部 */
.footer-section::after {
    content: '';
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 20px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    /* 放在页脚内容下方，作为背景装饰 */
    z-index: -1;
    pointer-events: none;
}

/* 到达底部时展示页脚 */
.footer-section.footer-visible {
    opacity: 1;
    transform: none;
    pointer-events: auto;
}

.footer-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHZpZXdCb3g9IjAgMCA0MCA0MCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPGNpcmNsZSBjeD0iMjAiIGN5PSIyMCIgcj0iMSIgZmlsbD0icmdiYSgwLCAwLCAwLCAwLjAzKSIvPgo8L3N2Zz4=') repeat;
    opacity: 0.3;
}

.footer-content {
    position: relative;
    z-index: 2;
}

.footer-left,
.footer-right {
    position: relative;
    z-index: 2;
}

.footer-copyright {
    margin: 0;
    font-size: 14px;
    color: #64748b;
    font-weight: 500;
    line-height: 1.6;
}

.footer-text {
    margin: 0;
    font-size: 14px;
    color: #64748b;
    font-weight: 500;
    line-height: 1.6;
}

.icp-link {
    color: #64748b;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
}

.icp-link:hover {
    color: #667eea;
    text-decoration: none;
    transform: translateY(-1px);
}

.icp-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

.icp-link:hover::after {
    width: 100%;
}

/* 公安备案样式 */
.beian-link {
    color: #64748b;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.beian-link:hover {
    color: #667eea;
    text-decoration: none;
    transform: translateY(-1px);
}

.beian-icon {
    width: 16px;
    height: 16px;
    vertical-align: middle;
    margin-right: 2px;
}

.beian-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

.beian-link:hover::after {
    width: 100%;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .footer-section {
        padding: 16px 0;
        min-height: 44px;
    }
    
    /* 移动端缩窄页脚背景 */
    .footer-section::after {
        height: 16px;
    }
    
    .footer-section .row {
        padding-left: 40px !important;
        padding-right: 40px !important;
    }
    
    .footer-copyright,
    .footer-text {
        font-size: 13px;
        text-align: center;
    }
    
    .footer-right {
        text-align: center !important;
        margin-top: 10px;
    }
    
    /* 移动端备案信息优化 */
    .footer-text {
        line-height: 1.8;
    }
    
    .beian-icon {
        width: 14px;
        height: 14px;
    }
}

@media (max-width: 480px) {
    .footer-section {
        padding: 12px 0;
        min-height: 40px;
    }
    
    /* 小屏进一步缩窄页脚背景 */
    .footer-section::after {
        height: 12px;
    }
    
    .footer-section .row {
        padding-left: 30px !important;
        padding-right: 30px !important;
    }
    
    .footer-copyright,
    .footer-text {
        font-size: 12px;
    }
}