/* 基础重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f9fafb;
    --bg-blue: #eff6ff;
    --white: #ffffff;
    --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);
}

html { scroll-behavior: smooth; }

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

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

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-gray);
    transition: color 0.2s;
}

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

.btn-login {
    color: var(--primary);
    font-weight: 500;
}

.mobile-login {
    display: none;
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all 0.3s;
}

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

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.btn-primary {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 0.625rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

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

.btn-outline {
    display: inline-block;
    border: 2px solid var(--white);
    color: var(--white);
    padding: 0.875rem 2rem;
    border-radius: 9999px;
    font-weight: 500;
    transition: all 0.3s;
    background: transparent;
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
}

.btn-outline-sm {
    display: inline-block;
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    transition: all 0.2s;
    background: transparent;
}

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    border-radius: 9999px;
}

.btn-block {
    width: 100%;
    text-align: center;
}

/* Hero 区域 */
.hero {
    position: relative;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding-top: 70px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
}

.circle-1 { width: 600px; height: 600px; top: -200px; right: -100px; }
.circle-2 { width: 400px; height: 400px; bottom: -100px; left: -100px; }

.hero-content {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: calc(100vh - 70px);
    padding: 4rem 1.5rem;
    gap: 4rem;
}

.hero-text { flex: 1; max-width: 550px; }

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-desc {
    font-size: 1.125rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

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

.hero-buttons .btn-primary:hover {
    background: var(--bg-light);
    transform: scale(1.05);
}

.hero-stats { display: flex; gap: 3rem; }

.stat-item { display: flex; flex-direction: column; }

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--white);
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.7);
}

.hero-image { flex: 1.5; display: flex; justify-content: center; }


/* Dashboard 卡片 */
.dashboard-card {
    background: var(--white);
    border-radius: 1.5rem;
    padding: 2.5rem;
    width: 520px;
    box-shadow: var(--shadow-xl);
    transform: scale(1.15);
}

.dashboard-header {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

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

.dash-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.dash-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
}

.dash-change {
    font-size: 0.75rem;
    color: #10b981;
}

.dash-tag {
    font-size: 0.625rem;
    background: #d1fae5;
    color: #059669;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
}

.dashboard-chart {
    background: var(--bg-light);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
}

.chart-title {
    font-size: 0.75rem;
    color: var(--text-gray);
    margin-bottom: 0.75rem;
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    height: 80px;
}

.bar {
    flex: 1;
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 0.25rem 0.25rem 0 0;
}

.dashboard-pie { padding: 0.5rem 0; }

.pie-title {
    font-size: 0.75rem;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.pie-items {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.pie-item {
    font-size: 0.75rem;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.dot.wechat { background: #07c160; }
.dot.alipay { background: #1677ff; }
.dot.unionpay { background: #e62129; }
.dot.other { background: #9ca3af; }

/* 通用区块样式 */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 1rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* 功能特性 */
.features {
    padding: 5rem 0;
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

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

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--white);
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.feature-desc {
    color: var(--text-gray);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.feature-link {
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 500;
}

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

/* 核心优势 */
.advantages {
    padding: 5rem 0;
    background: var(--white);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

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

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.advantage-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.advantage-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.advantage-desc {
    color: var(--text-gray);
    font-size: 0.875rem;
}


/* 页脚 */
.footer {
    background: #111827;
    padding: 4rem 0 2rem;
    color: var(--text-light);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 4rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #374151;
}

.footer-brand { max-width: 280px; }

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.footer-slogan {
    margin-top: 0.75rem;
    color: var(--text-light);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: 4rem;
}

.footer-column-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-list li, .footer-list a {
    color: var(--text-light);
    font-size: 0.875rem;
    transition: color 0.2s;
}

.footer-list a:hover { color: var(--white); }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-top: 1rem;
}

.footer-info {
    text-align: right;
}

.footer-info p {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.copyright {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* 页面标题区域 */
.page-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 8rem 0 4rem;
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.page-desc {
    font-size: 1.125rem;
    color: rgba(255,255,255,0.8);
}

/* 产品区块 */
.product-section {
    padding: 5rem 0;
}

.product-section.bg-light {
    background: var(--bg-light);
}

.product-content {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.product-content.reverse {
    flex-direction: row-reverse;
}

.product-info { flex: 1; }

.product-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.product-desc {
    color: var(--text-gray);
    margin-bottom: 2rem;
}

.product-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.pf-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.pf-item p {
    font-size: 0.875rem;
    color: var(--text-gray);
}

.product-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

/* 手机模型 */
.phone-mockup {
    width: 280px;
    background: #1f2937;
    border-radius: 2rem;
    padding: 0.75rem;
    box-shadow: var(--shadow-xl);
}

.phone-screen {
    background: var(--white);
    border-radius: 1.5rem;
    overflow: hidden;
}

.pay-ui { padding: 2rem 1.5rem; }

.pay-header {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.pay-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.pay-methods {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.pay-method {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--bg-light);
    border-radius: 0.5rem;
    font-size: 0.875rem;
}

.pay-method.active {
    background: var(--bg-blue);
    border: 1px solid var(--primary);
}

.pm-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.pm-icon svg {
    display: block;
    vertical-align: middle;
}

.pay-btn {
    width: 100%;
    padding: 0.875rem;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
}

/* POS 模型 */
.pos-mockup {
    width: 360px;
    background: #1f2937;
    border-radius: 1rem;
    padding: 1rem;
    box-shadow: var(--shadow-xl);
}

.pos-screen {
    background: var(--bg-blue);
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
}

.pos-header {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.pos-amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1rem;
}

.pos-hint {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: 1rem;
}

.pos-methods {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.pos-methods span {
    padding: 0.5rem 1rem;
    background: var(--white);
    border-radius: 0.375rem;
    font-size: 0.75rem;
    color: var(--primary);
}

/* 分账卡片 */
.split-card {
    background: var(--white);
    border-radius: 1rem;
    padding: 1.5rem;
    width: 380px;
    box-shadow: var(--shadow-xl);
}

.split-header {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid #e5e7eb;
}

.split-total {
    display: flex;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-blue);
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.split-total .amount {
    font-weight: 600;
    color: var(--primary);
}

.split-items {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.split-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem;
    background: var(--bg-light);
    border-radius: 0.375rem;
    font-size: 0.875rem;
}

.split-status {
    display: flex;
    justify-content: space-between;
    padding: 1rem;
    background: #d1fae5;
    border-radius: 0.5rem;
}

.status-value.success {
    color: #059669;
    font-weight: 600;
}

/* 场景网格 */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.scenario-item {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
}

.scenario-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.scenario-item h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.scenario-item p {
    font-size: 0.8125rem;
    color: var(--text-gray);
}


/* 关于我们页面 */
.about-section {
    padding: 4rem 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content p {
    color: var(--text-gray);
    margin-bottom: 1rem;
    line-height: 1.8;
}

/* 时间线 */
.timeline-section {
    padding: 4rem 0;
}

.timeline-section.bg-light {
    background: var(--bg-light);
}

.timeline {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary);
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
    padding-left: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0.25rem;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    transform: translateX(-5px);
}

.timeline-year {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-gray);
    font-size: 0.9375rem;
}

/* 资质证书 */
.cert-section {
    padding: 4rem 0;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.cert-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
}

.cert-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cert-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.cert-card p {
    color: var(--text-gray);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

/* 联系我们页面 */
.contact-section {
    padding: 4rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.method-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.method-card {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 0.75rem;
}

.method-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.method-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.method-card p {
    color: var(--text-gray);
    font-size: 0.875rem;
}

.method-value {
    font-weight: 600;
    color: var(--primary) !important;
}

/* 表单 */
.contact-form {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 1rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    font-size: 0.9375rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

/* 公司信息 */
.company-info {
    padding: 4rem 0;
}

.company-info.bg-light {
    background: var(--bg-light);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.info-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
}

.info-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.info-list li {
    color: var(--text-gray);
    font-size: 0.875rem;
    margin-bottom: 0.375rem;
}

/* 解决方案页面 */
.solutions-section {
    padding: 4rem 0;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.solution-card-lg {
    background: var(--white);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
}

.solution-card-lg:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.solution-icon-lg {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.solution-card-lg h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.solution-card-lg > p {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

.solution-features {
    margin-bottom: 1.5rem;
}

.solution-features li {
    color: var(--text-gray);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

/* 应用市场页面 */
.apps-section {
    padding: 4rem 0;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

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

.app-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.app-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.app-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.app-card p {
    color: var(--text-gray);
    font-size: 0.875rem;
}

.app-tag {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: #fef3c7;
    color: #d97706;
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
}

/* 开放平台页面 */
.dev-section {
    padding: 4rem 0;
}

.dev-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

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

.dev-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.dev-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.dev-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.dev-card p {
    color: var(--text-gray);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

/* 接入流程 */
.process-section {
    padding: 4rem 0;
}

.process-section.bg-light {
    background: var(--bg-light);
}

.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.process-step {
    text-align: center;
    padding: 1.5rem;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.process-step h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.process-step p {
    color: var(--text-gray);
    font-size: 0.875rem;
}

.process-arrow {
    color: var(--primary);
    font-size: 1.5rem;
}

/* 响应式 */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .dev-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-content { flex-direction: column; text-align: center; }
    .hero-text { max-width: 100%; }
    .hero-buttons { justify-content: center; }
    .hero-stats { justify-content: center; }
    .product-content { flex-direction: column; }
    .product-content.reverse { flex-direction: column; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    
    .btn-login { display: none; }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        gap: 0;
        box-shadow: var(--shadow-md);
    }
    
    .nav-links.active { display: flex; }
    
    .nav-links li { width: 100%; }
    
    .nav-link {
        display: block;
        padding: 0.75rem 1rem;
        border-radius: 0.5rem;
    }
    
    .nav-link:hover, .nav-link.active {
        background: var(--bg-light);
    }
    
    /* 移动端登录按钮在菜单底部 */
    .mobile-login {
        display: block;
        margin-top: 0.5rem;
    }
    
    .mobile-login a {
        display: block;
        padding: 0.75rem 1rem;
        background: var(--primary);
        color: var(--white) !important;
        text-align: center;
        border-radius: 0.5rem;
        font-weight: 500;
    }
    .hero-title { font-size: 2rem; }
    .features-grid { grid-template-columns: 1fr; }
    .advantages-grid { grid-template-columns: 1fr; }
    .solutions-grid { grid-template-columns: 1fr; }
    .apps-grid { grid-template-columns: 1fr; }
    .dev-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr; }
    .cert-grid { grid-template-columns: 1fr; }
    .footer-content { flex-direction: column; gap: 2rem; }
    .footer-links { flex-wrap: wrap; gap: 2rem; }
    .process-steps { flex-direction: column; }
    .process-arrow { transform: rotate(90deg); }
    .section-title { font-size: 1.75rem; }
    .page-title { font-size: 2rem; }
    .product-features { grid-template-columns: 1fr; }
    
    /* 页脚底部响应式布局 - 移动端垂直排列 */
    .footer-bottom {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-certs {
        text-align: center;
        margin-bottom: 1rem;
    }
    
    .footer-info {
        text-align: center;
    }
}


/* 页脚证书信息区域 */
.footer-certs {
    text-align: left;
}

.footer-certs p {
    font-size: 0.75rem;
    color: #9ca3af;
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.footer-certs p:last-child {
    margin-bottom: 0;
}

.footer-certs a {
    color: #9ca3af;
    transition: color 0.2s;
}

.footer-certs a:hover {
    color: var(--white);
}


/* 微信二维码展示区域 */
.wechat-qrcodes {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1rem;
}

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

.qrcode-item img {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 0.5rem;
    border: 1px solid #e5e7eb;
    margin-bottom: 0.5rem;
}

.qrcode-item p {
    font-size: 0.875rem;
    color: var(--text-gray);
    font-weight: 500;
}