/* 全局重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #00d4ff;
    --secondary-color: #0066ff;
    --accent-color: #ff6b35;
    --background-dark: #0a0a0a;
    --background-dark-2: #1a1a1a;
    --background-dark-3: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    --border-color: #333333;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #0066ff 100%);
    --gradient-accent: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    --shadow-lg: 0 25px 50px -12px rgba(0, 212, 255, 0.25);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    background: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 加载动画 */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--background-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-content {
    text-align: center;
}

.radar-animation {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
}

.radar-circle {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: radar-pulse 2s ease-in-out infinite;
}

.radar-circle::before,
.radar-circle::after {
    content: '';
    position: absolute;
    width: 70%;
    height: 70%;
    border: 1px solid var(--primary-color);
    border-radius: 50%;
    top: 15%;
    left: 15%;
    opacity: 0.6;
    animation: radar-pulse 2s ease-in-out infinite 0.3s;
}

.radar-circle::after {
    width: 40%;
    height: 40%;
    top: 30%;
    left: 30%;
    animation-delay: 0.6s;
}

.radar-dot {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 1s ease-in-out infinite;
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: var(--background-dark-3);
    border-radius: 2px;
    margin: 20px auto 0;
    overflow: hidden;
}

.loading-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 2px;
    animation: loading-progress 3s ease-in-out infinite;
}

@keyframes radar-pulse {
    0% { transform: scale(0.5); opacity: 1; }
    100% { transform: scale(1.2); opacity: 0; }
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.5); }
}

@keyframes loading-progress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 600;
}

.logo-icon {
    font-size: 1.5rem;
}

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

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-menu.active {
    display: flex;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    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(--gradient-primary);
    transition: width 0.3s ease;
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* 主横幅区域 */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.floating-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, var(--primary-color), transparent),
        radial-gradient(2px 2px at 40px 70px, var(--secondary-color), transparent),
        radial-gradient(1px 1px at 90px 40px, var(--accent-color), transparent),
        radial-gradient(1px 1px at 130px 80px, var(--primary-color), transparent);
    background-repeat: repeat;
    background-size: 150px 150px;
    animation: float 20s ease-in-out infinite;
    opacity: 0.6;
}

.grid-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    justify-items: center;
    padding-top: 70px;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.hero-text {
    text-align: center;
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

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

.subtitle {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
    justify-content: center;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn-primary,
.btn-secondary {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

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

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

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-hand-mockup {
    position: relative;
    width: 400px;
    height: 500px;
    background-image: url('hand-with-phone.webp');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    filter: drop-shadow(0 20px 40px rgba(0, 212, 255, 0.3));
}

.location-overlay {
    position: absolute;
    top: 25%;
    left: 50%;
    transform: translateX(-50%);
    width: 160px;
    height: 160px;
    pointer-events: none;
}

.scanning-line {
    position: absolute;
    top: 0;
    left: 10%;
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, #00d4ff, #6b73ff, transparent);
    animation: scanning 3s ease-in-out infinite;
    z-index: 1;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(5deg); }
}

@keyframes pulse-ring {
    0% { 
        transform: translate(-50%, -50%) scale(0.8); 
        opacity: 1; 
        border-color: #00d4ff;
    }
    50% { 
        transform: translate(-50%, -50%) scale(1.5); 
        opacity: 0.6;
        border-color: #6b73ff;
    }
    100% { 
        transform: translate(-50%, -50%) scale(2.2); 
        opacity: 0; 
        border-color: #00d4ff;
    }
}

@keyframes scanning {
    0% { 
        top: 10%; 
        opacity: 0; 
        background: linear-gradient(90deg, transparent, #00d4ff, transparent);
    }
    25% { 
        opacity: 1; 
        background: linear-gradient(90deg, transparent, #6b73ff, #00d4ff, transparent);
    }
    50% { 
        opacity: 0.8;
        background: linear-gradient(90deg, transparent, #00d4ff, #6b73ff, transparent);
    }
    75% { 
        opacity: 0.6;
        background: linear-gradient(90deg, transparent, #6b73ff, transparent);
    }
    100% { 
        top: 85%; 
        opacity: 0; 
        background: linear-gradient(90deg, transparent, #00d4ff, transparent);
    }
}

@keyframes secondary-pulse {
    0%, 100% { 
        transform: scale(1); 
        opacity: 0.8;
        background: #00d4ff;
    }
    50% { 
        transform: scale(1.6); 
        opacity: 0.4;
        background: #6b73ff;
    }
}

@keyframes tertiary-pulse {
    0%, 100% { 
        transform: scale(1); 
        opacity: 0.6;
        background: #6b73ff;
    }
    50% { 
        transform: scale(1.4); 
        opacity: 0.3;
        background: #00d4ff;
    }
}

/* 快速定位工具 */
.quick-tool-section {
    padding: 80px 0;
    background: var(--background-dark-2);
}

.quick-tool-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.quick-tool-card h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.quick-tool-card p {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.location-form {
    max-width: 500px;
    margin: 0 auto;
}

.input-group {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.input-group input {
    flex: 1;
    padding: 15px 20px;
    background: var(--background-dark-3);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.locate-btn {
    padding: 15px 30px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

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

.btn-loading {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.form-note {
    font-size: 0.9rem;
    color: var(--text-muted);
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 服务项目 */
.services-section {
    padding: 100px 0;
}

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

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.service-card:hover::before {
    left: 100%;
}

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

.service-card.featured {
    border-color: var(--primary-color);
    position: relative;
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--gradient-accent);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 25px;
    line-height: 1.6;
}

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

.service-features li {
    padding: 8px 0;
    color: var(--text-secondary);
}

.service-btn {
    width: 100%;
    padding: 15px;
    background: transparent;
    border: 2px solid var(--primary-color);
    border-radius: 10px;
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.service-btn:hover {
    background: var(--primary-color);
    color: var(--background-dark);
}

/* 功能特色 */
.features-section {
    padding: 100px 0;
    background: var(--background-dark-2);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-item {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-item h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* SEO关键词模块 */
.seo-keywords-section {
    padding: 80px 0;
}

.seo-content h2 {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 50px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.keywords-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
}

.keyword-category {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 25px;
    transition: all 0.3s ease;
}

.keyword-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.keyword-category h4 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.keyword-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.keyword-tag {
    background: var(--background-dark-3);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.keyword-tag:hover {
    background: var(--primary-color);
    color: var(--background-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

/* 特殊分类样式 */
.keyword-category:nth-child(5) {
    border-color: var(--accent-color);
}

.keyword-category:nth-child(5) h4 {
    color: var(--accent-color);
}

.keyword-category:nth-child(5):hover {
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.2);
}

.keyword-category:nth-child(6) {
    border-color: #ff4757;
}

.keyword-category:nth-child(6) h4 {
    color: #ff4757;
}

.keyword-category:nth-child(6):hover {
    border-color: #ff4757;
    box-shadow: 0 10px 30px rgba(255, 71, 87, 0.2);
}

/* 用户案例 */
.testimonials-section {
    padding: 100px 0;
    background: var(--background-dark-2);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 30px;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.testimonial-content {
    margin-bottom: 25px;
}

.testimonial-content p {
    color: var(--text-secondary);
    font-style: italic;
    line-height: 1.6;
    position: relative;
}

.testimonial-content p::before {
    content: '"';
    font-size: 3rem;
    color: var(--primary-color);
    position: absolute;
    top: -10px;
    left: -15px;
}

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

.author-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.author-info h5 {
    color: var(--text-primary);
    margin-bottom: 5px;
}

.author-info span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 关于我们 */
.about-section {
    padding: 100px 0;
}

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

.about-text h2 {
    font-size: 2.2rem;
    margin-bottom: 25px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.about-features {
    display: flex;
    gap: 40px;
}

.about-feature {
    text-align: center;
}

.feature-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.feature-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

.tech-stack {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.tech-item {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 20px;
    text-align: center;
    color: var(--primary-color);
    font-weight: 600;
    transition: all 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* 页脚 */
.footer {
    background: var(--background-dark-2);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 20px;
}

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

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 15px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    color: var(--primary-color);
    margin-bottom: 20px;
}

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

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

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    text-align: center;
    color: var(--text-muted);
}

/* 悬浮按钮 */
.floating-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 1000;
}

.float-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    background: var(--gradient-primary);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.float-btn:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: var(--shadow-glow);
}

.contact-btn {
    background: var(--gradient-accent);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 10, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        border-top: 1px solid var(--border-color);
        gap: 15px;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-link {
        padding: 10px 0;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
        padding-top: 120px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        justify-content: center;
        gap: 30px;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .phone-hand-mockup {
        width: 300px;
        height: 375px;
    }
    
    .location-overlay {
        width: 120px;
        height: 120px;
        top: 24%;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .about-features {
        justify-content: center;
        gap: 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .tech-stack {
        grid-template-columns: 1fr;
    }
    
    .floating-buttons {
        bottom: 20px;
        right: 20px;
    }
    
    .float-btn {
        width: 50px;
        height: 50px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content {
        padding-top: 140px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.5rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .keywords-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .about-features {
        flex-direction: column;
        gap: 20px;
    }
    
    .phone-hand-mockup {
        width: 250px;
        height: 312px;
    }
    
    .location-overlay {
        width: 100px;
        height: 100px;
        top: 23%;
    }
    
    .input-group {
        flex-direction: column;
    }
}

/* 动画和过渡效果 */
.fade-in {
    animation: fadeIn 1s ease-in-out;
}

.slide-up {
    animation: slideUp 0.8s ease-out;
}

.scale-in {
    animation: scaleIn 0.6s ease-out;
}

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

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

@keyframes scaleIn {
    from { 
        opacity: 0;
        transform: scale(0.9);
    }
    to { 
        opacity: 1;
        transform: scale(1);
    }
}

/* 加载完成后隐藏加载屏 */
.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-dark-2);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* 选择文本样式 */
::selection {
    background: var(--primary-color);
    color: var(--background-dark);
}

::-moz-selection {
    background: var(--primary-color);
    color: var(--background-dark);
}