/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1E90FF;
    --primary-dark: #0066CC;
    --primary-light: #E6F2FF;
    --secondary-color: #00BFFF;
    --success-color: #10B981;
    --warning-color: #FF8C00;
    --text-dark: #1A1A1A;
    --text-gray: #666666;
    --text-light: #999999;
    --bg-white: #FFFFFF;
    --bg-gray: #F5F7FA;
    --bg-dark: #1A1A1A;
    --border-color: #E5E7EB;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式 */
.btn-primary {
    display: inline-block;
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    box-shadow: 0 4px 12px rgba(0, 120, 212, 0.3);
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 120, 212, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

/* 头部导航 - 顶部透明，背景与Banner统一 */
.header {
    background: transparent;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 10px 0;
    transition: all 0.3s ease;
}

.header.hidden {
    transform: translateY(-100%);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 700;
    color: white;
}

.logo-icon {
    font-size: 22px;
}

.brand-badge {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    margin-left: 10px;
    animation: badgePulse 2s ease-in-out infinite;
}

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

.nav {
    display: flex;
    gap: 40px;
}

.nav-link {
    color: white;
    font-weight: 500;
    font-size: 15px;
    position: relative;
}

.nav-link:hover {
    color: rgba(255, 255, 255, 0.8);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: white;
    transition: width 0.3s ease;
}

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

.header-btn {
    display: none;
}

/* 固定头部 */
.fixed-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow-md);
    z-index: 99;
    padding: 12px 0;
    transform: translateY(-100%);
    transition: all 0.3s ease;
}

.fixed-header.show {
    transform: translateY(0);
}

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

.fixed-header .logo {
    font-size: 20px;
}

.header-actions {
    display: flex;
    gap: 10px;
}

/* Banner 区域 - 更鲜亮的多层渐变，向上延伸覆盖 header */
.banner {
    background:
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.08) 0%, transparent 50%),
        linear-gradient(135deg, #00E5FF 0%, #1E90FF 30%, #00BFFF 60%, #00D4FF 100%);
    background-size: 200% 200%, 200% 200%, 200% 200%;
    animation: gradientBG 15s ease infinite;
    min-height: 110vh;
    margin-top: -70px;
    padding-top: 180px;
    padding-bottom: 80px;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" 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(%23grid)"/></svg>');
    opacity: 0.3;
}

.banner .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

/* Banner 第一个容器：标题 */
.banner .container:first-child {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

/* Banner 第二个容器：内容和图片 */
.banner .container:nth-child(2) {
    flex: 1;
    display: flex;
    align-items: flex-start;
}

.banner-content {
    flex: 1;
    color: white;
    z-index: 1;
    padding-right: 40px;
}

.banner-title {
    font-size: 64px;
    font-weight: 800;
    margin: 0;
    line-height: 1.2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    color: white;
}

.badge {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 16px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.4);
    animation: badgePulse 2s ease-in-out infinite;
}

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

.banner-subtitle {
    font-size: 20px;
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0.95;
}

.features-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.feature-icon {
    color: #4CAF50;
    font-weight: bold;
    font-size: 18px;
}

/* 信任标识 */
.trust-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 20px;
    margin-bottom: 30px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 14px;
    color: white;
}

.trust-icon {
    font-size: 16px;
}

.trust-text strong {
    color: #FFE082;
    font-size: 16px;
}

/* 下载区域 */
.download-area {
    margin-bottom: 30px;
}

.download-btns {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.btn-download {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 18px 35px;
    border-radius: 12px;
    background: white;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
}

.btn-download-primary {
    background: linear-gradient(135deg, #4CAF50, #45A049);
    color: white;
    transform: scale(1.05);
}

.btn-download-primary:hover {
    transform: scale(1.08);
    box-shadow: 0 12px 32px rgba(76, 175, 80, 0.4);
}

.btn-icon {
    font-size: 28px;
    font-weight: bold;
}

.btn-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.btn-text strong {
    font-size: 20px;
    font-weight: 700;
}

.btn-text small {
    font-size: 14px;
    opacity: 0.8;
}

/* 今日已重装统计 */
.today-stats {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px 25px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 2px solid rgba(255, 224, 130, 0.3);
    min-width: 150px;
}

.stats-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 5px;
}

.stats-number {
    display: flex;
    align-items: baseline;
    gap: 2px;
    font-family: 'Courier New', monospace;
    font-weight: 700;
    color: #FFE082;
}

.stats-number .thousands {
    font-size: 28px;
}

.stats-number .hundreds,
.stats-number .tens,
.stats-number .ones {
    font-size: 24px;
    display: inline-block;
    min-width: 0.6em;
    text-align: center;
    transition: all 0.3s ease;
}

.stats-number .ones.changed {
    transform: scale(1.2);
    color: #FFF;
}

.stats-number .units {
    font-size: 14px;
    margin-left: 3px;
    color: rgba(255, 255, 255, 0.9);
}

.download-info {
    display: flex;
    gap: 40px;
    font-size: 14px;
    opacity: 0.9;
}

.download-info p {
    display: flex;
    align-items: center;
    gap: 8px;
}

.update-time,
.system-support {
    color: #FFE082;
    font-weight: 600;
}

.banner-bottom {
    display: flex;
    gap: 30px;
}

/* 用户评价轮播区域 */
.user-reviews {
    margin-top: 30px;
    overflow: hidden;
    height: 60px;
    position: relative;
}

.reviews-container {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.reviews-track {
    position: absolute;
    width: 100%;
    transition: transform 0.5s ease-in-out;
}

.review-item {
    height: 30px;
    display: flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    padding: 0 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.review-item .time {
    color: rgba(255, 255, 255, 0.7);
    margin-right: 5px;
}

.review-item .user-id {
    color: #FFE082;
    font-weight: 600;
    margin: 0 5px;
}

.review-item .content {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 笔记本图片容器 */
.banner-image {
    flex: 0 0 600px;
    position: relative;
    align-self: center;
    background: transparent;
}

.laptop-image-container {
    position: relative;
    width: 100%;
    height: auto;
    overflow: hidden;
    background: transparent;
}

.laptop-image {
    width: 100%;
    height: auto;
    display: block;
}

/* 屏幕遮罩层 - 用于显示安装进度 */
.screen-overlay {
    position: absolute;
    top: 9%;
    left: 11%;
    right: 10%;
    bottom: 33%;
    background: rgba(13, 27, 42, 0.95);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(30, 58, 95, 0.8);
    transition: opacity 0.5s ease;
    opacity: 1;
}

.screen-overlay.hidden {
    opacity: 0 !important;
    pointer-events: none;
}

.overlay-content {
    text-align: center;
    color: white;
    padding: 30px;
    width: 100%;
}

.win-logo {
    display: flex;
    flex-wrap: wrap;
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
}

.win-logo > div {
    width: 28px;
    height: 28px;
    transition: all 0.3s ease;
}

.win-logo-tl {
    background: linear-gradient(135deg, #f25022, #f25022);
}

.win-logo-tr {
    background: linear-gradient(135deg, #7fba00, #7fba00);
}

.win-logo-bl {
    background: linear-gradient(135deg, #00a4ef, #00a4ef);
}

.win-logo-br {
    background: linear-gradient(135deg, #ffb900, #ffb900);
}

.install-status {
    width: 100%;
}

.status-text {
    font-size: 16px;
    margin-bottom: 20px;
    display: block;
    opacity: 0.9;
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 20px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #4CAF50, #45A049);
    width: 0%;
    border-radius: 4px;
    transition: none;
}

.progress-percent {
    font-size: 20px;
    font-weight: 700;
    color: #4CAF50 !important;
    min-width: 50px;
    display: inline-block;
    text-align: right;
}

.status-bar {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px 25px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.status-item {
    font-size: 16px;
}

.progress {
    font-size: 24px;
    font-weight: 700;
    color: #4CAF50;
}

/* 通用区域样式 */
.section {
    padding: 100px 0;
}

.section-white {
    background: var(--bg-white);
}

.section-gray {
    background: var(--bg-gray);
}

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

.section-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-gray);
}

/* 特性卡片网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.card-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.card-desc {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.8;
}

/* 步骤区域 */
.steps-container {
    display: grid;
    gap: 50px;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 40px;
    padding: 40px;
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.step-item.active {
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow-md);
}

.step-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-light);
    -webkit-text-stroke: 2px var(--primary-color);
    line-height: 1;
}

.step-item.active .step-number {
    color: var(--primary-color);
    -webkit-text-stroke: 0;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.step-desc {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
}

.step-image {
    flex: 0 0 300px;
}

.mockup-screen {
    background: var(--bg-dark);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.mockup-header {
    background: rgba(255, 255, 255, 0.1);
    height: 40px;
    display: flex;
    align-items: center;
    padding: 0 15px;
    gap: 8px;
}

.mockup-header::before {
    content: '';
    width: 12px;
    height: 12px;
    background: #FF5F57;
    border-radius: 50%;
}

.mockup-header::after {
    content: '';
    width: 12px;
    height: 12px;
    background: #FEBC2E;
    border-radius: 50%;
}

.mockup-body {
    padding: 30px;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mockup-select {
    color: white;
    font-size: 16px;
    font-weight: 600;
}

.mockup-option {
    background: rgba(255, 255, 255, 0.1);
    padding: 12px 15px;
    border-radius: 8px;
    color: white;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.mockup-option:hover {
    background: rgba(255, 255, 255, 0.2);
}

.mockup-option.active {
    background: var(--primary-color);
}

.mockup-status {
    color: white;
    font-size: 18px;
    text-align: center;
    margin-bottom: 20px;
}

.mockup-progress {
    margin-top: auto;
}

.progress-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.mockup-progress .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #4CAF50);
    border-radius: 4px;
}

@keyframes progressAnimation {
    0% { width: 0; }
    50% { width: 100%; }
    100% { width: 0; }
}

.progress-text {
    text-align: center;
    color: white;
    font-size: 20px;
    font-weight: 700;
}

.mockup-success {
    width: 80px;
    height: 80px;
    background: #4CAF50;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: white;
    margin: 0 auto 20px;
    animation: successPop 0.5s ease-out;
}

@keyframes successPop {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.mockup-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    text-align: center;
}

/* 对比表格 */
.comparison-table {
    background: var(--bg-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    font-size: 16px;
}

.comparison-table th.highlight {
    background: var(--primary-dark);
    position: relative;
}

.comparison-table th.highlight::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 40px 40px 0;
    border-color: transparent #FF8C00 transparent transparent;
}

.comparison-table td.highlight {
    background: var(--primary-light);
    color: var(--primary-dark);
    font-weight: 600;
}

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

.comparison-table tr:hover td {
    background: var(--primary-light);
}

.comparison-table tr:hover td.highlight {
    background: var(--primary-color);
    color: white;
}

/* CTA 区域 */
.section-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
}

.cta-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 15px;
}

.cta-desc {
    font-size: 20px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.cta-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 60px;
}

.btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 50px;
    background: white;
    color: var(--primary-color);
    border-radius: 50px;
    font-size: 20px;
    font-weight: 700;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.btn-cta-icon {
    font-size: 24px;
}

.btn-cta-outline {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 50px;
    background: transparent;
    color: white;
    border: 2px solid white;
    border-radius: 50px;
    font-size: 20px;
    font-weight: 700;
    transition: all 0.3s ease;
}

.btn-cta-outline:hover {
    background: rgba(255, 255, 255, 0.1);
}

.cta-stats {
    display: flex;
    justify-content: center;
    gap: 80px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    opacity: 0.9;
}

/* 底部 */
.footer {
    background: var(--bg-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 40px 0;
    text-align: center;
}

.footer-text {
    margin-bottom: 15px;
    font-size: 15px;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    font-size: 14px;
}

.footer-links span {
    color: rgba(255, 255, 255, 0.3);
}

.footer-links a:hover {
    color: white;
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 999;
    display: none;
    backdrop-filter: blur(5px);
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: white;
    border-radius: 16px;
    z-index: 1000;
    max-width: 600px;
    width: 90%;
    display: none;
    opacity: 0;
    transition: all 0.3s ease;
}

.modal.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 32px;
    color: var(--text-gray);
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-dark);
}

.modal-content {
    padding: 40px;
}

.modal-content h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--text-dark);
}

.video-placeholder {
    background: var(--bg-gray);
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
}

.video-icon {
    font-size: 64px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.help-content p {
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.help-content ul {
    padding-left: 20px;
}

.help-content li {
    margin-bottom: 15px;
    line-height: 1.8;
    color: var(--text-gray);
}

.help-content strong {
    color: var(--primary-color);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .banner .container {
        flex-direction: column;
        text-align: center;
    }
    
    .banner-content {
        margin-bottom: 50px;
    }
    
    .banner-title {
        flex-direction: column;
        justify-content: center;
        font-size: 42px;
    }
    
    .features-list {
        justify-content: center;
    }
    
    .download-btns {
        flex-direction: column;
        align-items: center;
    }
    
    .download-info {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .banner-bottom {
        justify-content: center;
    }
    
    .banner-image {
        flex: none;
        width: 100%;
        max-width: 500px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .step-item {
        flex-direction: column;
        text-align: center;
    }
    
    .step-image {
        width: 100%;
        max-width: 300px;
    }
    
    .cta-btns {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .comparison-table {
        overflow-x: auto;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .header-btn {
        display: block;
    }
    
    .banner-title {
        font-size: 36px;
    }
    
    .banner-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .cta-title {
        font-size: 36px;
    }
    
    .stat-number {
        font-size: 40px;
    }
}

@media (max-width: 480px) {
    .banner {
        padding: 120px 0 60px;
    }
    
    .banner-title {
        font-size: 28px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .btn-download {
        padding: 15px 25px;
        flex-direction: column;
        text-align: center;
    }
    
    .btn-download-primary {
        transform: scale(1);
    }
    
    .cta-title {
        font-size: 28px;
    }
    
    .cta-btns {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-cta,
    .btn-cta-outline {
        width: 100%;
        justify-content: center;
    }
}

/* 箭头浮动动画 */
@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.btn-icon {
    animation: bounce 1s ease-in-out infinite;
}