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

:root {
    --primary-color: #FF6B35;
    --secondary-color: #4ECDC4;
    --accent-color: #FFE66D;
    --dark-color: #1A1A2E;
    --light-color: #F7F7F7;
    --text-color: #333;
    --text-light: #666;
    --gradient-1: linear-gradient(135deg, #FF6B35 0%, #F7931E 100%);
    --gradient-2: linear-gradient(135deg, #4ECDC4 0%, #44A08D 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    padding: 15px 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    width: 40px;
    height: 40px;
}

.brand-name {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* 按钮样式 */
.btn-primary {
    background: var(--gradient-1);
    color: white;
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    padding: 12px 30px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
    border: 2px solid var(--primary-color);
}

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

/* 英雄区 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0.05;
    z-index: -1;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-light);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.btn-hero {
    padding: 15px 40px;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-hero .icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

.hero-image {
    animation: fadeInRight 1s ease-out;
}

.hero-image img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.2));
}

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

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
}

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

/* 核心功能 */
.features {
    padding: 100px 0;
    background: white;
}

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

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--gradient-1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 40px;
    height: 40px;
    fill: white;
}

.feature-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 15px;
}

.feature-desc {
    color: var(--text-light);
    line-height: 1.8;
}

/* 产品优势 */
.advantages {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.advantages-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.advantage-item {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.advantage-number {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 72px;
    font-weight: 900;
    color: rgba(255, 107, 53, 0.1);
}

.advantage-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.advantage-desc {
    color: var(--text-light);
    line-height: 1.8;
}

/* 工作流程 */
.workflow {
    padding: 100px 0;
    background: white;
}

.workflow-steps {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
}

.step-number {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    background: var(--gradient-1);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

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

.step-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
}

.step-desc {
    color: var(--text-light);
    font-size: 14px;
}

.step-arrow {
    font-size: 32px;
    color: var(--primary-color);
    margin: 0 20px;
}

/* 未来规划 */
.roadmap {
    padding: 100px 0;
    background: var(--dark-color);
    color: white;
}

.roadmap .section-title,
.roadmap .section-subtitle {
    color: white;
}

.roadmap-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.roadmap-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    gap: 40px;
    margin-bottom: 60px;
    position: relative;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-badge {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-1);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 600;
    white-space: nowrap;
}

.timeline-badge.current {
    background: var(--gradient-2);
}

.timeline-content {
    flex: 1;
    background: rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 20px;
    margin-top: 40px;
}

.timeline-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
}

.timeline-features {
    list-style: none;
}

.timeline-features li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.timeline-features li:last-child {
    border-bottom: none;
}

/* 用户评价 */
.testimonials {
    padding: 100px 0;
    background: white;
}

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

.testimonial-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.testimonial-rating {
    font-size: 24px;
    margin-bottom: 20px;
}

.testimonial-text {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 30px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.author-name {
    font-weight: 600;
    margin-bottom: 5px;
}

.author-title {
    font-size: 14px;
    color: var(--text-light);
}

/* 下载区 */
.download {
    padding: 100px 0;
    background: var(--gradient-1);
    color: white;
    text-align: center;
}

.download-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
}

.download-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.download-info {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 40px;
}

.download-version,
.download-size,
.download-system {
    text-align: center;
}

.version-label,
.size-label,
.system-label {
    display: block;
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 5px;
}

.version-number,
.size-number,
.system-number {
    display: block;
    font-size: 24px;
    font-weight: 700;
}

.btn-download {
    background: white;
    color: var(--primary-color);
    padding: 20px 60px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 20px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s;
    margin-bottom: 20px;
}

.btn-download:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.btn-download .icon {
    width: 28px;
    height: 28px;
    fill: currentColor;
}

.download-note {
    font-size: 14px;
    opacity: 0.8;
}

.download-note a {
    color: white;
    text-decoration: underline;
}

/* 页脚 */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 60px 0 30px;
}

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

.footer-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

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

.footer-links li,
.footer-contact li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-contact li {
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links-bottom {
    display: flex;
    gap: 20px;
}

.footer-links-bottom a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

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

/* 返回顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    z-index: 999;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    fill: white;
}

.back-to-top.show {
    display: flex;
}

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

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .features-grid,
    .advantages-content,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .workflow-steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
        margin: 20px 0;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}