/* 主题颜色变量 */
:root {
    --primary-color: #0061D5;
    --primary-hover: #004A9E;
    --primary-light: rgba(0, 97, 213, 0.1);
    --primary-shadow: rgba(0, 97, 213, 0.3);
    --gradient-start: #0061D5;
    --gradient-end: #004A9E;
    --primary-rgb: 0, 97, 213;
    --primary-hover-rgb: 0, 74, 158;
    
    /* 文字颜色变量 */
    --text-primary: #212121;
    --text-secondary: #616161;
    --text-muted: #9E9E9E;
    --text-light: #E0E0E0;
    --text-white: #ffffff;
    
    /* 边框颜色变量 */
    --border-light: #E0E0E0;
    --border-muted: #F5F5F5;
}

/* 主题切换器样式 */
.theme-switcher {
    position: fixed;
    top: 100px;
    right: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    padding: 16px;
    z-index: 1001;
    border: 1px solid rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    min-width: 200px;
}

.theme-switcher h4 {
    margin: 0 0 12px 0;
    font-size: 14px;
    font-weight: 600;
    color: #333;
    text-align: center;
}

.color-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}

.color-option {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.active {
    border-color: #333;
}

.color-option.active::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-white);
    font-weight: bold;
    font-size: 14px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--primary-color);
    color: var(--text-white);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    z-index: 1002;
    box-shadow: 0 4px 16px var(--primary-shadow);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px var(--primary-shadow);
}

.theme-toggle .icon {
    transition: transform 0.3s ease;
}

.theme-toggle.active .icon {
    transform: rotate(180deg);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--text-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    gap: 8px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--primary-shadow);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 20px var(--primary-shadow);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 40px;
    height: 40px;
}

.logo-img {
    width: 40px;
    font-size: 40px;
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin: 5px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white);
    transition: color 0.3s ease;
    line-height: 1;
    display: flex;
    align-items: center;
}

.navbar.scrolled .logo-text {
    color: var(--primary-color);
}

.navbar.scrolled .logo-img {
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--text-white);
}

.navbar.scrolled .nav-link {
    color: var(--text-secondary);
}

.navbar.scrolled .nav-link:hover {
    color: var(--primary-color);
}

.nav-actions {
    display: flex;
    gap: 16px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-white);
    transition: all 0.3s ease;
}

.navbar.scrolled .nav-toggle span {
    background-color: var(--text-secondary);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: var(--text-white);
    padding: 100px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 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="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    margin-top: 100px;
}

.hero-title .subtitle {
    display: block;
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-top: 0.5rem;
}

.highlight {
    background: linear-gradient(45deg, #FFD700, #FF6B35);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-slogan {
    margin: 24px 0;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    display: inline-block;
    animation: sloganGlow 2s ease-in-out infinite alternate;
}

.slogan-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: 1px;
}

@keyframes sloganGlow {
    0% {
        box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
    }
    100% {
        box-shadow: 0 0 30px rgba(255, 255, 255, 0.5);
    }
}

.hero-subtitle {
    font-size: 1.5rem;
    line-height: 1.6;
    margin-bottom: 24px;
    opacity: 0.9;
    font-weight: 500;
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.6;
    margin-bottom: 32px;
    opacity: 0.9;
}

.hero-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 48px;
    justify-content: center;
}

.hero-stats {
    display: flex;
    gap: 64px;
    justify-content: center;
    margin-top: 32px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #FFD700;
}

.stat-label {
    font-size: 1.125rem;
    color: var(--text-secondary);
    opacity: 0.3;
}

/* Hero Visual */
.app-mockup {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.mockup-img {
    width: 100%;
    max-width: 400px;
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    animation: float 6s ease-in-out infinite;
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 4s ease-in-out infinite;
}

.card-1 {
    top: 10%;
    left: -20%;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: -20%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 10%;
    left: -10%;
    animation-delay: 2s;
}

.card-icon {
    font-size: 1.5rem;
}

.card-text {
    font-weight: 600;
    font-size: 0.875rem;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* 功能特色 */
.features {
    padding: 80px 0;
    background-color: #FAFAFA;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.feature-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.feature-item.reverse {
    direction: rtl;
}

.feature-item.reverse .feature-content {
    direction: ltr;
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
    color: var(--text-white);
}

.feature-title {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.feature-subtitle {
    font-size: 1.125rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 16px;
}

.feature-description {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 24px;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #00C851;
    font-weight: 700;
}

.feature-visual {
    display: flex;
    justify-content: center;
    position: relative;
}

.feature-img {
    width: 100%;
    max-width: 500px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.feature-img:hover {
    transform: scale(1.05);
}

/* 新增视觉元素样式 */

/* 功能1：AI创作流程覆盖层 */
.feature-overlay {
    position: absolute;
    top: 20px;
    left: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.overlay-step {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.9);
    padding: 8px 12px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.step-number {
    width: 24px;
    height: 24px;
    background: var(--primary-color);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
}

.step-text {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* 功能2：主题展示 */
.theme-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-width: 400px;
}

.theme-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.theme-img {
    width: 100%;
    height: 120px;
    object-fit: cover;
}

.theme-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: var(--text-white);
    padding: 8px 12px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* 功能3：多设备展示 */
.multi-device-showcase {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.device-img {
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
}

.device-img:hover {
    transform: scale(1.05);
}

.print-img {
    max-width: 300px;
    z-index: 3;
}

.mobile-img {
    max-width: 200px;
    z-index: 2;
}

.tablet-img {
    max-width: 250px;
    z-index: 1;
}

.sync-indicator {
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.sync-text {
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 600;
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

.sync-animation {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--gradient-start), transparent);
    animation: sync 2s ease-in-out infinite;
}

@keyframes sync {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* 功能4：聊天界面 */
.chat-interface {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    max-width: 400px;
    width: 100%;
}

.chat-header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--text-white);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.ai-avatar {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.ai-name {
    font-weight: 600;
    font-size: 1rem;
}

.chat-messages {
    padding: 16px;
    max-height: 300px;
    overflow-y: auto;
}

.message {
    margin-bottom: 12px;
    max-width: 80%;
}

.ai-message {
    margin-right: auto;
}

.user-message {
    margin-left: auto;
}

.message p {
    padding: 12px 16px;
    border-radius: 18px;
    font-size: 0.875rem;
    line-height: 1.4;
}

.ai-message p {
    background: #F5F5F5;
    color: var(--text-primary);
}

.user-message p {
    background: var(--primary-color);
    color: var(--text-white);
}

/* 功能5：家长仪表板 */
.parent-dashboard {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: 24px;
    max-width: 400px;
    width: 100%;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.dashboard-header h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.date {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    text-align: center;
    padding: 16px;
    background: #F8F9FA;
    border-radius: 12px;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

/* 这个 .stat-label 被上面的 hero 区域的 .stat-label 覆盖，删除重复定义 */

.progress-chart {
    background: #F5F5F5;
    border-radius: 8px;
    height: 8px;
    overflow: hidden;
}

.chart-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--gradient-start), #00C851);
    border-radius: 8px;
    transition: width 1s ease;
}

/* 功能6：社区展示 */
.community-showcase {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: 24px;
    max-width: 400px;
    width: 100%;
}

.community-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.community-header h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.member-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.shared-works {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.work-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: #F8F9FA;
    border-radius: 12px;
    transition: transform 0.2s ease;
}

.work-item:hover {
    transform: translateX(4px);
}

.work-img {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
}

.work-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.work-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.work-author {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.work-stats {
    display: flex;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* 功能7：平台展示 */
.platform-showcase {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    position: relative;
}

.platform-device {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: transform 0.3s ease;
}

.platform-device:hover {
    transform: translateY(-8px);
}

.platform-img {
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    max-width: 150px;
}

.platform-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
}

.sync-cloud {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: rgba(255, 255, 255, 0.9);
    padding: 8px 12px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.cloud-icon {
    font-size: 1.25rem;
}

.cloud-text {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* 用户评价区域 */
.testimonials {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.testimonials::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="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.testimonials-container {
    position: relative;
    max-width: 100%;
    overflow: hidden;
    margin: 40px 0;
}

.testimonials-scroll {
    display: flex;
    gap: 24px;
    padding: 20px 0;
    transition: transform 0.3s ease;
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.testimonials-scroll::-webkit-scrollbar {
    display: none;
}

.testimonial-card {
    min-width: 320px;
    max-width: 320px;
    background: var(--text-white);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 48px;
    color: var(--primary-color);
    opacity: 0.1;
    font-family: serif;
    line-height: 1;
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid var(--primary-light);
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 4px 0;
    line-height: 1.2;
}

.user-details {
    font-size: 12px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.2;
}

.rating {
    display: flex;
    gap: 2px;
    flex-shrink: 0;
}

.star {
    font-size: 14px;
    color: #ffd700;
    line-height: 1;
}

.testimonial-text {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.testimonials-controls {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 40px;
}

.scroll-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    background: var(--text-white);
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.scroll-btn:hover {
    background: var(--primary-color);
    color: var(--text-white);
    transform: scale(1.1);
}

.scroll-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.scroll-btn svg {
    width: 20px;
    height: 20px;
}

/* 价格方案 */
.pricing {
    padding: 80px 0;
    background-color: var(--text-white);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.pricing-card {
    background: #ffffff;
    border: 2px solid var(--border-light);
    border-radius: 16px;
    padding: 32px;
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--text-white);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
}

.pricing-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.pricing-price {
    margin-bottom: 16px;
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
}

.price-period {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.pricing-savings {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.savings-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.savings-badge {
    background: #00C851;
    color: var(--text-white);
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.pricing-features {
    margin-bottom: 32px;
}

.pricing-action {
    text-align: center;
}

.pricing-note {
    text-align: center;
    margin-top: 48px;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* 下载区域 */
.download {
    padding: 80px 0;
    background: linear-gradient(135deg, #FAFAFA 0%, #F5F5F5 100%);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.download-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.download-subtitle {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.download-stats {
    display: flex;
    gap: 48px;
}

.download-actions {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    background: #ffffff;
    border: 2px solid var(--border-light);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.download-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.download-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.download-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.download-platform {
    display: block;
    font-weight: 600;
    font-size: 1rem;
}

/* Footer */
.footer {
    background-color: var(--text-primary);
    color: var(--text-secondary);
    padding: 32px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
    font-size: 30px;
}

.footer-logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    margin: 5px;
}

.footer-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: #BDBDBD;
}

.footer-description {
    color: #BDBDBD;
    line-height: 1.6;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-white);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: #BDBDBD;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--text-white);
}

.footer-bottom {
    /* border-top: 1px solid #424242; */
    /* padding-top: 32px; */
    display: flex;
    justify-content: space-between;
    align-items: start;
}

.footer-info {
    color: #BDBDBD;
    font-size: 0.875rem;
}

.footer-info p {
    margin-bottom: 4px;
}

.footer-info a {
    color: #BDBDBD;
    text-decoration: none;
}

.footer-certificates {
    display: flex;
    gap: 16px;
}

.certificate {
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.75rem;
    color: #BDBDBD;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content {
        max-width: 600px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-title .subtitle {
        font-size: 1.8rem;
    }
    
    .feature-item {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .feature-item.reverse {
        direction: ltr;
    }
    
    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-logo {
        height: 32px;
    }
    
    .logo-img {
        width: 32px;
        height: 32px;
        font-size: 24px;
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
    
    .footer-logo-img {
        width: 28px;
        height: 28px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-title .subtitle {
        font-size: 1.4rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .testimonials {
        padding: 60px 0;
    }
    
    .testimonial-card {
        min-width: 280px;
        max-width: 280px;
        padding: 20px;
    }
    
    .testimonials-scroll {
        gap: 16px;
    }
    
    .testimonials-controls {
        margin-top: 30px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .download-stats {
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.5rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-title .subtitle {
        font-size: 1.2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .features {
        padding: 60px 0;
    }
    
    .testimonials {
        padding: 40px 0;
    }
    
    .testimonial-card {
        min-width: 260px;
        max-width: 260px;
        padding: 16px;
    }
    
    .user-avatar {
        width: 40px;
        height: 40px;
    }
    
    .user-name {
        font-size: 14px;
    }
    
    .user-details {
        font-size: 11px;
    }
    
    .testimonial-text {
        font-size: 13px;
    }
    
    .pricing {
        padding: 60px 0;
    }
    
    .download {
        padding: 60px 0;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 滚动动画 */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

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