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

:root {
    --primary-color: #8B5CF6;
    --primary-dark: #7C3AED;
    --secondary-color: #06B6D4;
    --accent-color: #F472B6;
    --dark-color: #1E293B;
    --text-color: #475569;
    --text-light: #94A3B8;
    --light-bg: #F8FAFC;
    --white: #FFFFFF;
    --border-color: #E2E8F0;
    --box-shadow: 0 2px 10px rgba(139, 92, 246, 0.08);
    --box-shadow-hover: 0 12px 30px rgba(139, 92, 246, 0.15);
    --border-radius: 10px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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);
    overflow-x: hidden;
    background: var(--white);
}

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

/* 导航栏 */
.header {
    background: var(--white);
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    box-shadow: 0 2px 4px rgba(15, 23, 42, 0.03);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
}

.logo h1 {
    font-size: 26px;
    color: var(--dark-color);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav {
    display: flex;
    gap: 35px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-dark);
}

.nav-link.download-btn {
    background: var(--dark-color);
    color: var(--white);
    padding: 10px 24px;
    border-radius: 20px;
    font-size: 14px;
}

.nav-link.download-btn:hover {
    background: #000;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* 英雄区域 */
.hero {
    position: relative;
    height: 480px;
    overflow: hidden;
    background: var(--light-bg);
}

.hero-slider {
    width: 100%;
    height: 100%;
    position: relative;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide.active {
    opacity: 1;
}

.slide:nth-child(1) {
    background: linear-gradient(135deg, #F3E8FF 0%, #E9D5FF 100%);
}

.slide:nth-child(2) {
    background: linear-gradient(135deg, #EDE9FE 0%, #DDD6FE 100%);
}

.slide:nth-child(3) {
    background: linear-gradient(135deg, #F5F3FF 0%, #EDE9FE 100%);
}

.slide-content {
    text-align: center;
    color: var(--dark-color);
    max-width: 800px;
    padding: 0 20px;
}

.slide-content h2 {
    font-size: 48px;
    margin-bottom: 16px;
    font-weight: 700;
    letter-spacing: -1px;
}

.slide-content p {
    font-size: 20px;
    margin-bottom: 32px;
    color: var(--text-color);
}

.cta-btn {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 14px 48px;
    font-size: 16px;
    border-radius: 24px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.35);
}

.cta-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.45);
}

.slider-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 4px;
    background: rgba(51, 51, 51, 0.2);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--primary-color);
    width: 24px;
}

.dot:hover {
    background: var(--primary-dark);
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--white);
    border: none;
    color: var(--dark-color);
    font-size: 24px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.slider-btn:hover {
    background: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.slider-btn.prev {
    left: 24px;
}

.slider-btn.next {
    right: 24px;
}

/* 特色功能 */
.features {
    padding: 64px 0;
    background: var(--white);
}

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 48px;
    color: var(--dark-color);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--white);
    padding: 32px 24px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-hover);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 56px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--dark-color);
    font-weight: 600;
}

.feature-card p {
    color: var(--text-color);
    font-size: 14px;
    line-height: 1.6;
}

/* 美食分类 */
.categories {
    padding: 64px 0;
    background: var(--light-bg);
}

.category-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 24px;
    border: 1px solid var(--border-color);
    background: var(--white);
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    color: var(--text-color);
}

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

.tab-btn.active {
    background: var(--primary-color);
    color: var(--dark-color);
    border-color: var(--primary-color);
}

.merchant-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.merchant-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--border-color);
}

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

.merchant-img {
    font-size: 72px;
    text-align: center;
    padding: 32px;
    background: var(--light-bg);
}

.merchant-info {
    padding: 16px;
}

.merchant-info h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--dark-color);
    font-weight: 600;
}

.rating {
    color: var(--text-color);
    font-size: 13px;
    margin-bottom: 8px;
}

.merchant-tags {
    display: flex;
    gap: 6px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.tag {
    background: #FDF4FF;
    color: var(--accent-color);
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
}

.delivery-info {
    color: var(--text-light);
    font-size: 13px;
}

/* 商家入驻 */
.merchants-join {
    padding: 80px 0;
    background: var(--white);
    border-top: 1px solid var(--border-color);
}

.join-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.join-text h2 {
    font-size: 36px;
    margin-bottom: 16px;
    color: var(--dark-color);
    font-weight: 700;
}

.join-text p {
    font-size: 18px;
    margin-bottom: 32px;
    color: var(--text-color);
}

.join-benefits {
    list-style: none;
    margin-bottom: 32px;
}

.join-benefits li {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-color);
    padding-left: 8px;
}

.join-visual {
    font-size: 180px;
    text-align: center;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

/* 骑手招募 */
.rider-recruit {
    padding: 80px 0;
    background: var(--light-bg);
}

.recruit-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.recruit-text h2 {
    font-size: 36px;
    margin-bottom: 16px;
    color: var(--dark-color);
    font-weight: 700;
}

.recruit-text p {
    font-size: 18px;
    margin-bottom: 32px;
    color: var(--text-color);
}

.recruit-benefits {
    list-style: none;
    margin-bottom: 32px;
}

.recruit-benefits li {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-color);
    padding-left: 8px;
}

.recruit-visual {
    font-size: 180px;
    text-align: center;
    animation: float 3s ease-in-out infinite;
}

/* APP下载区域 */
.download-section {
    padding: 80px 0;
    background: var(--white);
    border-top: 1px solid var(--border-color);
}

.download-section .section-title {
    color: var(--dark-color);
}

.download-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 48px;
}

.qr-codes {
    display: flex;
    gap: 80px;
    justify-content: center;
    flex-wrap: wrap;
}

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

.qr-code {
    width: 180px;
    height: 180px;
    background: var(--white);
    border-radius: var(--border-radius);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.qr-item p {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--dark-color);
}

.qr-subtitle {
    font-size: 13px;
    color: var(--text-light);
}

.download-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--dark-color);
    border: none;
    color: var(--white);
    padding: 14px 28px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.download-btn:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-hover);
}

.btn-icon {
    font-size: 36px;
}

.btn-text {
    text-align: left;
}

.btn-text small {
    display: block;
    font-size: 11px;
    opacity: 0.8;
}

.btn-text strong {
    display: block;
    font-size: 16px;
}

/* 关于我们 */
.about {
    padding: 80px 0;
    background: var(--light-bg);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 48px;
}

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

.stat-number {
    font-size: 44px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-color);
}

.about-text {
    text-align: center;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color);
    max-width: 700px;
    margin: 0 auto;
}

/* 页脚 */
.footer {
    background: #2C2C2C;
    color: var(--white);
    padding: 56px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 48px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--white);
    font-weight: 600;
}

.footer-section ul {
    list-style: none;
}

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.65);
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin-bottom: 8px;
    opacity: 0.65;
    font-size: 14px;
}

.footer-credentials {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.credentials-title {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--white);
    opacity: 0.8;
}

.credentials-item {
    font-size: 12px;
    margin-bottom: 6px;
    opacity: 0.5;
    line-height: 1.8;
}

.credentials-item a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: var(--transition);
}

.credentials-item a:hover {
    color: var(--primary-color);
    opacity: 1;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.4);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal.show {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--white);
    padding: 32px;
    border-radius: var(--border-radius);
    max-width: 480px;
    width: 90%;
    position: relative;
    animation: slideUp 0.3s ease;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

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

.modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
    line-height: 1;
}

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

.modal-content h2 {
    color: var(--dark-color);
    margin-bottom: 24px;
    font-size: 24px;
}

.contact-form {
    margin-top: 0;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-color);
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav.show {
        display: flex;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
        gap: 8px;
        border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    }
    
    .hero {
        height: 400px;
    }
    
    .slide-content h2 {
        font-size: 32px;
    }
    
    .slide-content p {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
        margin-bottom: 32px;
    }
    
    .features {
        padding: 48px 0;
    }
    
    .categories {
        padding: 48px 0;
    }
    
    .join-content,
    .recruit-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .join-visual,
    .recruit-visual {
        font-size: 120px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .merchant-grid {
        grid-template-columns: 1fr;
    }
    
    .qr-codes {
        gap: 40px;
    }
    
    .download-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .download-btn {
        width: 100%;
        justify-content: center;
    }
    
    .slider-btn {
        width: 36px;
        height: 36px;
        font-size: 20px;
    }
    
    .slider-btn.prev {
        left: 12px;
    }
    
    .slider-btn.next {
        right: 12px;
    }
    
    .merchants-join,
    .rider-recruit,
    .download-section,
    .about {
        padding: 56px 0;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 20px;
    }
    
    .nav-wrapper {
        padding: 14px 0;
    }
    
    .hero {
        height: 360px;
    }
    
    .slide-content h2 {
        font-size: 28px;
    }
    
    .slide-content p {
        font-size: 15px;
    }
    
    .cta-btn {
        padding: 12px 36px;
        font-size: 15px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .join-text h2,
    .recruit-text h2 {
        font-size: 28px;
    }
    
    .stat-number {
        font-size: 36px;
    }
    
    .modal-content {
        padding: 24px;
    }
    
    .footer-content {
        gap: 32px;
    }
}