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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 优化字体渲染 */
* {
    text-rendering: optimizeLegibility;
}

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

/* 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-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 0.25rem;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

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

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

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

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

.nav-menu a.active::after {
    width: 100%;
}

/* Hero区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    padding: 4rem 20px;
}

.hero-content {
    color: white;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-highlight {
    font-size: 1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.95);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    display: inline-block;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
}

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

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

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

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

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 0.8s ease 0.6s both;
}

.qrcode-demo {
    position: relative;
    width: 300px;
    height: 300px;
}

.qrcode-box {
    width: 250px;
    height: 250px;
    background: white;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    position: relative;
    animation: float 3s ease-in-out infinite;
}

.qrcode-svg {
    width: 100%;
    height: 100%;
    color: #000;
}

.wifi-icon {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 60px;
    height: 60px;
    color: white;
    animation: pulse 2s ease-in-out infinite;
}

.wifi-icon svg {
    width: 100%;
    height: 100%;
}

/* 功能特点 */
.features {
    padding: 6rem 0;
    background: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
}

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

.feature-card.highlight-card {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
    border: 2px solid rgba(99, 102, 241, 0.2);
}

.feature-card.highlight-card:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 核心优势 */
.advantages {
    padding: 6rem 0;
    background: white;
}

.advantages-content {
    max-width: 900px;
    margin: 0 auto;
    margin-top: 3rem;
}

.advantage-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: flex-start;
}

.advantage-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    opacity: 0.2;
    min-width: 80px;
}

.advantage-text h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.advantage-text p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 业务流程 */
.workflow {
    padding: 6rem 0;
    background: var(--bg-light);
}

.workflow-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 3rem;
}

.workflow-step {
    text-align: center;
    flex: 1;
    min-width: 200px;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-lg);
}

.workflow-step h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.workflow-step p {
    color: var(--text-secondary);
}

.workflow-arrow {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
}

/* 联系我们 */
.contact {
    padding: 6rem 0;
    background: white;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.contact-item {
    text-align: center;
    padding: 2rem;
    border-radius: 1rem;
    background: var(--bg-light);
    transition: all 0.3s ease;
}

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

.contact-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon svg {
    width: 100%;
    height: 100%;
}

.contact-item h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
}

.wechat-account {
    font-weight: 600;
    color: var(--primary-color);
    margin-top: 0.5rem;
    margin-bottom: 1rem;
}

.wechat-qrcode-container {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.wechat-qrcode {
    max-width: 200px;
    width: 100%;
    height: auto;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    border: 4px solid white;
    background: white;
    padding: 0.5rem;
    transition: all 0.3s ease;
    display: block;
}

.wechat-qrcode:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.wechat-qrcode-placeholder {
    margin-top: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 0.5rem;
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-color);
}

.qrcode-hint {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-align: center;
    line-height: 1.6;
}

.qrcode-tip {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
    font-style: italic;
}

/* 联系表单 */
.contact-form-container {
    max-width: 800px;
    margin: 4rem auto 0;
    padding: 3rem;
    background: var(--bg-light);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
}

.form-title {
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.required {
    color: #ef4444;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: white;
}

.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(99, 102, 241, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    margin-top: 0.5rem;
    position: relative;
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-message {
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
    font-weight: 500;
    margin-top: 1rem;
}

.form-message.success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.form-message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

/* 页脚 */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

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

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 加载动画优化 */
.hero-content,
.hero-visual {
    will-change: transform, opacity;
}

.feature-card,
.advantage-item,
.workflow-step,
.contact-item,
.arch-module,
.arch-feature {
    will-change: transform, opacity;
}

/* 优化动画性能，减少重绘 */
@media (prefers-reduced-motion: no-preference) {
    .feature-card,
    .advantage-item,
    .workflow-step,
    .contact-item,
    .arch-module,
    .arch-feature {
        transition: opacity 0.3s ease, transform 0.3s ease;
    }
}

/* 如果用户偏好减少动画，直接显示 */
@media (prefers-reduced-motion: reduce) {
    .feature-card,
    .advantage-item,
    .workflow-step,
    .contact-item,
    .arch-module,
    .arch-feature {
        opacity: 1 !important;
        transform: translateY(0) !important;
        transition: none !important;
    }
}

/* 性能优化 - 减少重绘 */
.navbar {
    will-change: box-shadow;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* 系统架构样式 */
.architecture {
    padding: 6rem 0;
    background: var(--bg-light);
}


.architecture-diagram {
    max-width: 1000px;
    margin: 3rem auto 0;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.arch-layer {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
}

.layer-header {
    margin-bottom: 2rem;
    text-align: center;
}

.layer-label {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.layer-title {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.layer-icon {
    font-size: 1.75rem;
}

.layer-tech {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.arch-modules {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.arch-module {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    border-radius: 0.75rem;
    background: var(--bg-light);
    transition: all 0.3s ease;
    min-width: 200px;
    max-width: 250px;
    position: relative;
    border: 2px solid transparent;
}

.arch-module.enhanced {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(249, 250, 251, 0.9));
    border: 2px solid rgba(99, 102, 241, 0.2);
    box-shadow: var(--shadow-sm);
}

.arch-module.enhanced:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
    background: white;
}

.module-badge {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    padding: 0.25rem 0.5rem;
    background: var(--primary-color);
    color: white;
    border-radius: 0.25rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.module-icon {
    width: 48px;
    height: 48px;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.module-icon svg {
    width: 100%;
    height: 100%;
}

.module-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-top: 0.75rem;
}

.module-tech {
    font-size: 0.8rem;
    color: var(--primary-color);
    text-align: center;
    margin-top: 0.25rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.module-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 0.5rem;
    font-style: italic;
}

.module-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    justify-content: center;
    margin-top: 0.75rem;
}

.feature-tag {
    padding: 0.25rem 0.5rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.arch-connector {
    height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    margin: 1rem 0;
}

.connector-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    opacity: 0.7;
}

.connector-svg {
    width: 100%;
    height: 100%;
}

.connector-line {
    animation: flowDown 2s ease-in-out infinite;
}

.data-point {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes flowDown {
    0% {
        stroke-dasharray: 0 200;
    }
    50% {
        stroke-dasharray: 100 200;
    }
    100% {
        stroke-dasharray: 200 200;
    }
}

.architecture-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.arch-feature {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
}

.feature-dot {
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    margin: 0 auto 1rem;
}

.arch-feature h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.arch-feature p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* 响应式设计 */
/* 网关层特殊样式 */
.gateway-layer {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
    border: 2px solid rgba(99, 102, 241, 0.1);
}

/* 外部服务 */
.arch-external {
    margin-top: 3rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.05), rgba(99, 102, 241, 0.05));
    border-radius: 1rem;
    border: 2px dashed rgba(99, 102, 241, 0.2);
}

.external-label {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.external-services {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.external-service {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: white;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.external-service:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.service-icon {
    font-size: 1.25rem;
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: white;
        flex-direction: column;
        padding: 5rem 2rem 2rem;
        box-shadow: var(--shadow-xl);
        transition: right 0.3s ease;
        gap: 0;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu a {
        display: block;
        padding: 1rem 0;
        width: 100%;
    }

    .nav-menu a::after {
        display: none;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-highlight {
        font-size: 0.9rem;
        padding: 0.625rem 1.25rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .workflow-steps {
        flex-direction: column;
    }

    .workflow-arrow {
        transform: rotate(90deg);
    }

    .advantage-item {
        flex-direction: column;
        text-align: center;
    }

    .advantage-number {
        margin: 0 auto;
    }

    .section-title {
        font-size: 2rem;
    }

    .layer-header {
        margin-bottom: 1.5rem;
    }

    .layer-label {
        font-size: 1.25rem;
        flex-direction: column;
        gap: 0.5rem;
    }

    .layer-tech {
        font-size: 0.8rem;
    }

    .external-services {
        flex-direction: column;
        align-items: center;
    }

    .connector-label {
        font-size: 0.7rem;
    }
}

@media (max-width: 480px) {
    .nav-brand h1 {
        font-size: 1.25rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .qrcode-demo {
        width: 250px;
        height: 250px;
    }

    .qrcode-box {
        width: 200px;
        height: 200px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .architecture-diagram {
        gap: 1rem;
    }

    .arch-modules {
        flex-direction: column;
        align-items: stretch;
    }

    .arch-module {
        min-width: auto;
    }

    .architecture-features {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }


    .contact-form-container {
        padding: 2rem 1.5rem;
        margin-top: 2rem;
    }

    .arch-module {
        max-width: 100%;
    }

    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
}