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

:root {
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #f093fb;
    --accent: #4facfe;
    --dark: #1a1a2e;
    --gray: #6b7280;
    --light: #f8fafc;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-pink: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

html {
    scroll-behavior: smooth;
}

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

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

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    text-decoration: none;
}

.logo-icon {
    font-size: 1.8rem;
}

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

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

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark);
}

/* ========== Hero 区域 ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
}

.hero-bg {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: var(--gradient);
    border-radius: 50%;
    opacity: 0.1;
    filter: blur(60px);
}

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

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

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

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 15px;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--gray);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.5);
}

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

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

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

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--dark);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray);
}

/* 手机模型 */
.hero-image {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: var(--dark);
    border-radius: 40px;
    padding: 15px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
    position: relative;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 25px;
    background: #000;
    border-radius: 20px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--gradient);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.demo-placeholder {
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
}

/* ========== 功能区域 ========== */
.features {
    padding: 100px 0;
    background: var(--white);
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 15px;
    color: var(--dark);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray);
}

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

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid #eee;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: transparent;
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: var(--gradient);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.feature-card p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* ========== 界面展示 ========== */
.showcase {
    padding: 100px 0;
    background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
}

.showcase-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.phone-frame {
    width: 300px;
    height: 600px;
    background: #1a1a2e;
    border-radius: 45px;
    padding: 15px;
    position: relative;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.2);
}

.phone-notch {
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 30px;
    background: #000;
    border-radius: 20px;
    z-index: 10;
}

.phone-content {
    width: 100%;
    height: 100%;
    background: #fff;
    border-radius: 35px;
    overflow: hidden;
}

.demo-screen {
    padding: 50px 20px 20px;
    height: 100%;
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
}

.demo-header {
    color: white;
    font-size: 1.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 30px;
}

.demo-bars {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.demo-bar {
    background: rgba(255,255,255,0.2);
    border-radius: 10px;
    padding: 15px;
    position: relative;
    overflow: hidden;
}

.demo-bar::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: var(--width);
    background: var(--color);
    border-radius: 10px;
    opacity: 0.8;
}

.demo-bar span {
    position: relative;
    z-index: 1;
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
}

.demo-bar span:last-child {
    float: right;
}

.showcase-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.showcase-card {
    width: 140px;
    height: 140px;
    background: white;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

.showcase-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.showcase-card i {
    font-size: 2.5rem;
    color: var(--primary);
}

.showcase-card span {
    font-weight: 600;
    color: var(--dark);
}

/* ========== 价格区域 ========== */
.pricing {
    padding: 100px 0;
    background: var(--white);
}

.pricing-toggle {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
}

.toggle-label {
    padding: 10px 25px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    color: var(--gray);
    transition: all 0.3s;
}

.toggle-label.active {
    background: var(--gradient);
    color: white;
}

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

.pricing-card {
    background: var(--white);
    border-radius: 25px;
    padding: 40px 30px;
    text-align: center;
    border: 2px solid #eee;
    transition: all 0.3s;
    position: relative;
}

.pricing-card:hover {
    border-color: var(--primary);
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.15);
}

.pricing-card.featured {
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-header h3 {
    font-size: 1.3rem;
    color: var(--gray);
    margin-bottom: 20px;
}

.price {
    margin-bottom: 10px;
}

.currency {
    font-size: 1.5rem;
    color: var(--primary);
    vertical-align: top;
}

.amount {
    font-size: 4rem;
    font-weight: 800;
    color: var(--primary);
}

.price-period {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 30px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.pricing-features li {
    padding: 12px 0;
    border-bottom: 1px solid #eee;
    color: var(--dark);
}

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

.pricing-features i {
    color: var(--primary);
    margin-right: 10px;
}

/* ========== 下载区域 ========== */
.download {
    padding: 100px 0;
    background: var(--dark);
    color: var(--white);
}

.download .section-header h2,
.download .section-header p {
    color: var(--white);
}

.download .section-header p {
    opacity: 0.8;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

.download-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 25px;
    padding: 50px 40px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s;
}

.download-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.download-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    color: var(--accent);
}

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.download-card p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 15px;
}

.version {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    margin-bottom: 25px;
}

.download-card .btn {
    width: 100%;
    justify-content: center;
}

.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========== 页脚 ========== */
.footer {
    background: #0f0f1a;
    color: var(--white);
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    margin-top: 15px;
}

.footer-brand .nav-brand {
    color: var(--white);
}

.footer h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--white);
}

.footer ul {
    list-style: none;
}

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

.footer ul a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-contact li {
    color: rgba(255, 255, 255, 0.6);
}

.footer-contact i {
    margin-right: 10px;
    color: var(--primary);
}

.qrcode-placeholder {
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.qrcode-placeholder i {
    font-size: 2.5rem;
    color: rgba(255, 255, 255, 0.5);
}

.qrcode-placeholder span {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .phone-mockup {
        width: 240px;
        height: 480px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        display: none;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .showcase-wrapper {
        flex-direction: column;
    }
    
    .download-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .qrcode-placeholder {
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
    }
    
    .showcase-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .showcase-card {
        width: 100%;
        height: 120px;
    }
}