/* 全局样式 */
:root {
    --primary-color: #F0B90B;
    --secondary-color: #1E2026;
    --tertiary-color: #2B2F36;
    --light-gray: #F5F5F5;
    --dark-gray: #333;
    --text-color: #212121;
    --text-light: #FFFFFF;
    --text-gray: #707A8A;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

body {
    color: var(--text-color);
    background-color: #FFFFFF;
    font-size: 16px;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

a:hover {
    color: #D0A00B;
}

h1, h2, h3, h4 {
    font-weight: 600;
}

.section-title {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--secondary-color);
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

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

.btn-primary:hover {
    background-color: #D0A00B;
    color: var(--secondary-color);
    box-shadow: 0 4px 8px rgba(240, 185, 11, 0.3);
}

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

.btn-secondary:hover {
    background-color: rgba(240, 185, 11, 0.1);
    color: var(--primary-color);
}

.btn-download {
    width: 100%;
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

.btn-download:hover {
    background-color: #D0A00B;
    color: var(--secondary-color);
}

/* 头部导航 */
header {
    background-color: white;
    padding: 15px 0;
    position: sticky;
    top: 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

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

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

.logo {
    width: 40px;
    height: 40px;
    margin-right: 10px;
}

.logo-container h1 {
    font-size: 1.8rem;
    color: var(--secondary-color);
    font-weight: 700;
}

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

.main-nav li {
    margin-left: 25px;
}

.main-nav li a {
    color: var(--dark-gray);
    font-weight: 500;
    position: relative;
}

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

.main-nav li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    bottom: -5px;
    left: 0;
    transition: width 0.3s ease;
}

.main-nav li a:hover::after {
    width: 100%;
}

.language-switcher a {
    display: flex;
    align-items: center;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--secondary-color);
    margin: 2px 0;
    transition: all 0.3s ease;
}

/* 英雄区 */
.hero {
    background: linear-gradient(145deg, #f7f9fc 0%, #edf2f7 100%);
    padding: 80px 0;
    overflow: hidden;
}

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

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--text-gray);
}

.cta-buttons {
    display: flex;
    gap: 15px;
}

.hero-image {
    flex: 1;
    text-align: right;
    max-width: 500px;
    margin-left: 40px;
}

.app-preview {
    width: 100%;
    height: auto;
    max-width: 300px;
}

/* 功能特点区 */
.features {
    padding: 80px 0;
    background-color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
    background-color: white;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.feature-card p {
    color: var(--text-gray);
    line-height: 1.5;
}

/* 下载区 */
.download {
    padding: 80px 0;
    background-color: var(--light-gray);
}

.download-description {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 40px;
    color: var(--text-gray);
    font-size: 1.1rem;
}

.download-options {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
}

.download-option {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    width: 300px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.download-option:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.download-option h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.download-img {
    margin-bottom: 25px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.download-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* 关于区 */
.about {
    padding: 80px 0;
    background-color: white;
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-gray);
    line-height: 1.7;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    flex: 1;
    min-width: 300px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    border-radius: 8px;
    background-color: var(--light-gray);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

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

/* 页脚 */
footer {
    background-color: var(--secondary-color);
    color: var(--text-light);
    padding: 60px 0 20px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 30px;
    flex: 1;
    min-width: 200px;
}

.footer-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 15px;
}

.footer-logo p {
    color: #aaa;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    flex: 2;
}

.footer-links-column {
    min-width: 150px;
}

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

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

.footer-links-column ul li {
    margin-bottom: 10px;
}

.footer-links-column ul li a {
    color: #aaa;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    color: #aaa;
    font-size: 0.9rem;
}

.footer-bottom p {
    margin-bottom: 10px;
}

/* 响应式样式 */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        margin-bottom: 40px;
        max-width: 100%;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .hero-image {
        margin-left: 0;
        text-align: center;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-stats {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
        transition: clip-path 0.4s ease-in-out;
        z-index: 99;
    }
    
    .main-nav.active {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }
    
    .main-nav li {
        margin: 15px 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .download-options {
        flex-direction: column;
        align-items: center;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 20px;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 1.8rem;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
    }
    
    .download-option {
        width: 100%;
    }
}