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

:root {
    --primary-color: #1a5fb4;
    --primary-light: #3584e4;
    --secondary-color: #00c853;
    --accent-color: #26a69a;
    --text-dark: #1a1a1a;
    --text-gray: #666;
    --text-light: #999;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

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

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(26, 95, 180, 0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

.btn-full {
    width: 100%;
}

/* 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: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

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

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

.logo {
    height: 55px;
    width: auto;
}

.brand-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: var(--transition);
}

/* Banner区域 */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 95, 180, 0.85), rgba(38, 166, 154, 0.75));
    z-index: -1;
}

.hero-content {
    color: white;
    max-width: 600px;
    padding-top: 70px;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 20px;
    opacity: 0.95;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-cta {
    display: flex;
    gap: 20px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

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

/* 通用区域标题 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

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

/* 核心优势 */
.features {
    padding: 100px 0;
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.feature-desc {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* 使用流程 */
.how-it-works {
    padding: 100px 0;
    background: white;
}

.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 250px;
    max-width: 300px;
    text-align: center;
}

.step-number {
    font-size: 72px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 20px;
}

.step-content h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.step-content p {
    font-size: 15px;
    color: var(--text-gray);
}

.step-arrow {
    color: var(--primary-color);
    opacity: 0.5;
}

.step-arrow svg {
    width: 40px;
    height: 40px;
}

/* 覆盖区域 */
.coverage {
    padding: 100px 0;
    background: var(--bg-light);
}

.coverage-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

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

.coverage-map {
    max-width: 900px;
    margin: 0 auto;
}

.map-placeholder {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
}

.china-map {
    width: 100%;
    height: auto;
}

/* 小程序展示 */
.app-showcase {
    padding: 100px 0;
    background: white;
}

.app-screenshots {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.phone-frame {
    text-align: center;
}

.phone-screen {
    width: 220px;
    height: 440px;
    background: #1a1a1a;
    border-radius: 30px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    margin-bottom: 20px;
    transition: var(--transition);
    overflow: hidden;
}

.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
    display: block;
}

.phone-screen:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 80px rgba(0,0,0,0.4);
}

.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

.phone-label {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dark);
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: var(--bg-light);
}

.contact-cards {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.contact-card {
    background: white;
    padding: 50px 40px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    min-width: 280px;
    flex: 1;
    max-width: 350px;
}

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

.contact-card-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.contact-card-icon svg {
    width: 36px;
    height: 36px;
    color: white;
}

.email-icon {
    background: linear-gradient(135deg, #1a5fb4, #3584e4);
}

.wechat-icon {
    background: linear-gradient(135deg, #07c160, #00c853);
}

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

.contact-card-value {
    font-size: 18px;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.contact-card-desc {
    font-size: 14px;
    color: var(--text-gray);
}

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

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    height: 50px;
    margin-bottom: 15px;
}

.footer-brand p {
    color: var(--text-light);
    font-size: 14px;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

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

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

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-contact p {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .coverage-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .app-screenshots {
        gap: 40px;
    }
    
    .phone-screen {
        width: 180px;
        height: 360px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow);
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .coverage-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .stat-number {
        font-size: 32px;
    }
    
    .contact-cards {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-card {
        width: 100%;
        max-width: 320px;
        padding: 40px 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .app-screenshots {
        gap: 20px;
    }
    
    .phone-screen {
        width: 140px;
        height: 280px;
        padding: 8px;
        border-radius: 20px;
    }
    
    .phone-screen img {
        border-radius: 12px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .coverage-stats {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 25px;
    }
    
    .phone-screen {
        width: 160px;
        height: 320px;
    }
}