/* 基础样式设置 */
:root {
    /* 主色调 */
    --primary-color: #6c63ff;
    --primary-light: #8a84ff;
    --primary-dark: #5046e5;
    
    /* 中性色调 */
    --text-color: #333333;
    --text-light: #666666;
    --text-lighter: #999999;
    --background: #ffffff;
    --background-alt: #f8f9fa;
    --border-color: #e0e0e0;
    
    /* 强调色 */
    --success: #2ecc71;
    --warning: #f39c12;
    --danger: #e74c3c;
    --info: #3498db;
    
    /* 尺寸变量 */
    --container-width: 1200px;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    
    /* 字体设置 */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-size-base: 16px;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    
    /* 动画时间 */
    --transition-fast: 0.2s;
    --transition-normal: 0.3s;
    --transition-slow: 0.5s;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-color);
    background-color: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 通用容器 */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* 通用区域样式 */
section {
    padding: 80px 0;
}

/* 区域标题 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 16px;
    color: var(--text-color);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-medium);
    font-size: 1rem;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    text-decoration: none;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(108, 99, 255, 0.2);
}

.btn-secondary {
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: rgba(108, 99, 255, 0.05);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-large {
    padding: 14px 28px;
    font-size: 1.125rem;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-wide {
    min-width: 200px;
}

/* 头部导航样式 */
.header {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    padding: 16px 0;
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 32px;
    margin-right: 10px;
}

.logo-text {
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-color);
}

.main-nav .nav-list {
    display: flex;
    list-style: none;
}

.main-nav .nav-list a {
    text-decoration: none;
    color: var(--text-color);
    padding: 8px 16px;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.main-nav .nav-list a:hover {
    color: var(--primary-color);
}

.header-cta {
    display: flex;
    align-items: center;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-color);
    margin: 5px 0;
    border-radius: 2px;
    transition: all var(--transition-normal);
}

/* 英雄区域样式 */
.hero {
    padding: 100px 0 60px;
    background: linear-gradient(to bottom, rgba(108, 99, 255, 0.03), rgba(255, 255, 255, 0));
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-text {
    flex: 1;
}

.hero h1 {
    font-size: 3rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero h1 .highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 32px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    gap: 32px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
}

.stat-text {
    font-size: 0.875rem;
    color: var(--text-light);
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero-screenshot {
    max-width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: transform var(--transition-normal);
}

.hero-screenshot:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.hero-img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 特色功能区域样式 */
.features {
    background-color: var(--background-alt);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background-color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.375rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 16px;
}

.feature-card p {
    color: var(--text-light);
}

/* 互动体验区域样式 */
.playground {
    background: linear-gradient(to bottom, rgba(108, 99, 255, 0.05), rgba(255, 255, 255, 0));
}

.playground-container {
    display: flex;
    gap: 40px;
    margin-top: 40px;
}

.playground-controls {
    flex: 1;
    max-width: 400px;
}

.control-group {
    background-color: white;
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
}

.control-group h3 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: 16px;
    color: var(--text-color);
}

.mode-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.mode-btn {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mode-btn:hover, .mode-btn.active {
    border-color: var(--primary-color);
    background-color: rgba(108, 99, 255, 0.05);
}

.mode-btn.active {
    box-shadow: 0 0 0 2px rgba(108, 99, 255, 0.2);
}

.mode-color {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    margin-right: 8px;
}

.gradient-preview {
    background: linear-gradient(135deg, #6c63ff, #3498db);
}

.mode-name {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

.opacity-control {
    display: flex;
    align-items: center;
    gap: 16px;
}

.slider {
    flex: 1;
    -webkit-appearance: none;
    height: 6px;
    border-radius: 3px;
    background: #e0e0e0;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.opacity-value {
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    min-width: 50px;
    text-align: center;
}

.timer-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.timer-presets {
    display: flex;
    gap: 10px;
}

.timer-preset {
    padding: 8px 12px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: white;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.timer-preset:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.timer-custom {
    display: flex;
    align-items: center;
    gap: 8px;
}

.timer-input {
    width: 60px;
    padding: 8px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.875rem;
}

.timer-label {
    font-size: 0.875rem;
    margin-right: 10px;
}

.timer-options {
    margin-top: 15px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.timer-option {
    display: flex;
    align-items: center;
    gap: 10px;
}

.timer-option select {
    padding: 6px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: white;
}

.timer-option input[type="text"] {
    padding: 6px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    width: 120px;
}

.timer-mode-switch {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
}

.timer-mode-switch label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.timer-display-options {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

#custom-message {
    margin-top: 8px;
    width: 100%;
    padding: 8px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.share-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.share-preview {
    background-color: rgba(108, 99, 255, 0.05);
    padding: 16px;
    border-radius: var(--border-radius);
    border: 1px dashed var(--primary-light);
}

.share-preview p {
    font-size: 0.875rem;
    margin-bottom: 10px;
}

.share-platforms {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.share-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: white;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.playground-preview {
    flex: 2;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.screen-preview {
    height: 400px;
    border-radius: var(--border-radius);
    background-color: black;
    overflow: hidden;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.preview-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    text-align: center;
    width: 100%;
}

.preview-time {
    margin-bottom: 20px;
}

.current-time {
    font-size: 3rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 10px;
}

.timer-countdown {
    font-size: 1.5rem;
    opacity: 0.8;
}

.preview-message {
    font-size: 1.125rem;
    opacity: 0.7;
}

.preview-controls {
    display: flex;
    justify-content: center;
}

.pomodoro-settings {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.setting-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.setting-group label {
    font-size: 0.9rem;
    color: var(--text-color);
}

.pomodoro-status {
    padding: 10px;
    background-color: rgba(108, 99, 255, 0.1);
    border-radius: var(--border-radius);
    margin-top: 15px;
    font-weight: var(--font-weight-medium);
}

/* 竞争对手对比区域样式 */
.comparison {
    background-color: var(--background-alt);
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-bottom: 20px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.comparison-table th,
.comparison-table td {
    padding: 16px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    background-color: white;
}

.comparison-table th {
    background-color: var(--primary-color);
    color: white;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    font-size: 0.875rem;
}

.comparison-table th:first-child {
    text-align: left;
}

.comparison-table td:first-child {
    text-align: left;
    font-weight: var(--font-weight-medium);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table .fa-check {
    color: var(--success);
}

.comparison-table .fa-check.highlight {
    color: var(--primary-color);
    font-size: 1.125rem;
}

.comparison-table .fa-times {
    color: var(--text-lighter);
}

.comparison-notes {
    color: var(--text-lighter);
    font-size: 0.875rem;
    text-align: right;
}

/* 用户痛点与解决方案区域样式 */
.painpoints {
    background: linear-gradient(to bottom, rgba(108, 99, 255, 0.03), rgba(255, 255, 255, 0));
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.solution-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: transform var(--transition-normal);
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.painpoint {
    padding: 24px;
    background-color: rgba(231, 76, 60, 0.05);
    border-bottom: 1px solid var(--border-color);
}

.painpoint h3 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: 12px;
    color: var(--danger);
    display: flex;
    align-items: center;
}

.painpoint h3 i {
    margin-right: 8px;
}

.painpoint p {
    font-style: italic;
    color: var(--text-light);
}

.solution {
    padding: 24px;
    background-color: rgba(46, 204, 113, 0.05);
}

.solution h3 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: 12px;
    color: var(--success);
    display: flex;
    align-items: center;
}

.solution h3 i {
    margin-right: 8px;
}

.testimonial-quote {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.testimonial-quote blockquote {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--text-color);
    margin-bottom: 16px;
    position: relative;
}

.testimonial-quote blockquote::before,
.testimonial-quote blockquote::after {
    content: '"';
    font-size: 2.5rem;
    font-family: Georgia, serif;
    color: var(--primary-light);
    opacity: 0.3;
    position: absolute;
}

.testimonial-quote blockquote::before {
    top: -20px;
    left: -20px;
}

.testimonial-quote blockquote::after {
    content: '"';
    bottom: -40px;
    right: -20px;
}

.testimonial-quote cite {
    font-style: normal;
    font-weight: var(--font-weight-medium);
    color: var(--text-light);
}

/* 数据统计区域样式 */
.stats-section {
    background-color: var(--background-alt);
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 60px;
}

.stat-card {
    background-color: white;
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: transform var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: 12px;
}

.stat-info {
    font-size: 0.875rem;
    color: var(--text-light);
}

.stats-graph {
    display: flex;
    align-items: center;
    gap: 40px;
    background-color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.graph-container {
    flex: 2;
    height: 300px;
}

.graph-info {
    flex: 1;
}

.graph-info h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 16px;
}

/* 价格方案区域样式 */
.pricing {
    background: linear-gradient(to bottom, rgba(108, 99, 255, 0.03), rgba(255, 255, 255, 0));
}

.pricing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 40px;
    gap: 16px;
}

.switch {
    position: relative;
    display: inline-block;
    width: 54px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: var(--transition-normal);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: var(--transition-normal);
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.save-badge {
    background-color: var(--success);
    color: white;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 10px;
    margin-left: 6px;
}

.pricing-plans {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 40px;
}

.pricing-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    width: 100%;
    max-width: 350px;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.pricing-card.popular {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(108, 99, 255, 0.15);
    border: 2px solid var(--primary-color);
    z-index: 1;
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-5px);
}

.pricing-tag {
    position: absolute;
    top: 12px;
    right: 0;
    background-color: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    padding: 4px 12px;
    border-radius: 4px 0 0 4px;
}

.pricing-header {
    padding: 30px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.pricing-header h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 16px;
}

.pricing-price {
    margin-bottom: 10px;
}

.price {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-color);
}

.price-yearly {
    display: none;
}

.period {
    display: block;
    font-size: 0.875rem;
    color: var(--text-lighter);
}

.pricing-features {
    padding: 30px;
}

.pricing-features ul {
    list-style: none;
}

.pricing-features li {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
    font-size: 0.9375rem;
}

.pricing-features li i {
    margin-right: 10px;
    width: 16px;
}

.pricing-features .fa-check {
    color: var(--success);
}

.pricing-features .fa-times {
    color: var(--text-lighter);
}

.pricing-cta {
    padding: 0 30px 30px;
}

.pricing-guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 60px;
    text-align: center;
    color: var(--text-light);
    font-size: 0.9375rem;
}

.pricing-guarantee i {
    color: var(--primary-color);
}

.pricing-faq {
    max-width: 900px;
    margin: 0 auto;
}

.pricing-faq h3 {
    text-align: center;
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 30px;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.faq-item h4 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: 8px;
}

.faq-item p {
    color: var(--text-light);
    font-size: 0.9375rem;
}

/* CTA 区域样式 */
.cta-section {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    color: white;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-section h2 {
    font-size: 2.25rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 1.125rem;
    margin-bottom: 32px;
    opacity: 0.9;
}

.signup-form {
    display: flex;
    max-width: 500px;
    margin: 0 auto 24px;
}

.signup-form input {
    flex: 1;
    padding: 14px 20px;
    border: none;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    font-size: 1rem;
}

.signup-form .btn {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    padding: 14px 24px;
    background-color: var(--primary-dark);
}

.signup-form .btn:hover {
    background-color: #3d329e;
}

.cta-note {
    font-size: 0.875rem;
    opacity: 0.7;
}

/* 信任标志区域样式 */
.trust-section {
    padding: 50px 0;
    background-color: var(--background-alt);
}

.trust-content {
    text-align: center;
}

.trust-section h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: 30px;
    color: var(--text-light);
}

.logos-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
}

.logo-item img {
    height: 40px;
    opacity: 0.7;
    transition: opacity var(--transition-normal);
}

.logo-item:hover img {
    opacity: 1;
}

/* 页脚样式 */
.footer {
    background-color: #f8f9fa;
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

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

.footer-logo img {
    height: 28px;
    margin-right: 10px;
}

.footer-logo span {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-color);
}

.footer-desc {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 0.9375rem;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(108, 99, 255, 0.1);
    color: var(--primary-color);
    transition: all var(--transition-normal);
}

.social-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.footer-col h4 {
   !    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    margin-bottom: 20px;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-light);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.language-selector select {
    padding: 8px 12px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
    background-color: white;
}

.copyright {
    font-size: 0.875rem;
    color: var(--text-lighter);
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(108, 99, 255, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
}

/* 响应式样式 */
@media (max-width: 1200px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px 20px;
    }
    
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-graph {
        flex-direction: column;
    }
}

@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-content {
        flex-direction: column;
    }
    
    .hero-text {
        order: 1;
        text-align: center;
    }
    
    .hero-visual {
        order: 0;
        margin-bottom: 40px;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .playground-container {
        flex-direction: column;
    }
    
    .playground-controls {
        max-width: none;
    }
    
    .pricing-plans {
        flex-direction: column;
        align-items: center;
    }
    
    .pricing-card.popular {
        transform: none;
    }
    
    .pricing-card.popular:hover {
        transform: translateY(-5px);
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .main-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
        margin-left: 16px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .signup-form {
        flex-direction: column;
    }
    
    .signup-form input {
        border-radius: var(--border-radius);
        margin-bottom: 10px;
    }
    
    .signup-form .btn {
        border-radius: var(--border-radius);
    }
    
    .logos-grid {
        gap: 20px;
    }
    
    .logo-item img {
        height: 30px;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 12px;
    }
    
    .hero-stats {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
    
    .stat {
        align-items: center;
    }
    
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
    }
    
    .timer-option {
        flex-wrap: wrap;
    }
    
    .timer-options {
        gap: 15px;
    }
}

/* 动画样式 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.5s ease-out forwards;
}