/* ============================================
   火恒云 - 企业级科技蓝风格
   主色: #1677ff, #0f6fff, #eaf4ff
   ============================================ */

:root {
    --primary: #1677ff;
    --primary-dark: #0f6fff;
    --primary-light: #eaf4ff;
    --primary-hover: #0958d9;
    --text-primary: #1a1a1a;
    --text-secondary: #595959;
    --text-muted: #8c8c8c;
    --bg-white: #ffffff;
    --bg-light: #f7f9fc;
    --bg-dark: #0a1628;
    --border: #e8e8e8;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(22,119,255,0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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;
    background: var(--bg-white);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   顶部导航
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 800;
    font-size: 16px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 4px 0;
}

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

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
    border-radius: 1px;
}

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(22,119,255,0.35);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-dark) 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(22,119,255,0.45);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}

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

.btn-lg {
    padding: 14px 36px;
    font-size: 16px;
    border-radius: var(--radius-md);
}

/* 移动端菜单 */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
    border-radius: 1px;
}

/* ============================================
   Banner区域
   ============================================ */
.banner {
    position: relative;
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #0a1628 0%, #1a3a5c 50%, #0d2137 100%);
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(22,119,255,0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(22,119,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.banner-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(22,119,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(22,119,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.5;
}

.banner-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.banner-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(22,119,255,0.15);
    border: 1px solid rgba(22,119,255,0.3);
    border-radius: 100px;
    font-size: 13px;
    color: #6ab7ff;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.banner-badge .dot {
    width: 8px;
    height: 8px;
    background: #52c41a;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.banner h1 {
    font-size: 52px;
    font-weight: 700;
    color: white;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.banner h1 span {
    background: linear-gradient(135deg, #6ab7ff 0%, #1677ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner-subtitle {
    font-size: 18px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 40px;
    line-height: 1.8;
}

.banner-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.banner-actions .btn-primary {
    background: white;
    color: var(--primary);
    box-shadow: 0 4px 20px rgba(255,255,255,0.2);
}

.banner-actions .btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}

.banner-actions .btn-outline {
    border-color: rgba(255,255,255,0.4);
    color: white;
}

.banner-actions .btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.6);
}

/* Banner右侧装饰 */
.banner-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 400px;
    height: 400px;
    z-index: 1;
}

.globe-ring {
    position: absolute;
    border: 1px solid rgba(22,119,255,0.2);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.globe-ring:nth-child(1) { width: 100%; height: 100%; animation-duration: 30s; }
.globe-ring:nth-child(2) { width: 75%; height: 75%; top: 12.5%; left: 12.5%; animation-duration: 25s; animation-direction: reverse; }
.globe-ring:nth-child(3) { width: 50%; height: 50%; top: 25%; left: 25%; animation-duration: 20s; }

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ============================================
   产品分类模块
   ============================================ */
.section {
    padding: 100px 0;
}

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

.section-label {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.section-title {
    font-size: 38px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 产品卡片 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-dark) 100%);
    transform: scaleX(0);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 24px;
    color: var(--primary);
}

.product-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-card .link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
}

.product-card .link:hover {
    gap: 10px;
}

/* ============================================
   云平台合作
   ============================================ */
.cloud-section {
    background: var(--bg-light);
}

.cloud-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.cloud-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 32px 40px;
    text-align: left;
    transition: var(--transition);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.cloud-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.cloud-logo {
    width: 56px;
    height: 56px;
    margin-bottom: 16px;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.cloud-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.cloud-card .tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 16px;
}

.cloud-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   解决方案模块
   ============================================ */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.solution-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 40px 20px;
    transition: var(--transition);
    text-align: center;
    aspect-ratio: 1 / 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.solution-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.solution-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-light) 0%, #d6e9ff 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
    flex-shrink: 0;
}

.solution-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.solution-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   联系咨询模块
   ============================================ */
.contact-section {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #152238 100%);
    color: white;
}

.contact-section .section-title {
    color: white;
}

.contact-section .section-desc {
    color: rgba(255,255,255,0.7);
}

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

.contact-info h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 24px;
}

.contact-info p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 32px;
    line-height: 1.8;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.contact-item-icon {
    width: 48px;
    height: 48px;
    background: rgba(22,119,255,0.2);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.contact-item-text {
    flex: 1;
}

.contact-item-text strong {
    display: block;
    font-size: 15px;
    margin-bottom: 2px;
}

.contact-item-text span {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
}

/* 联系表单 */
.contact-form {
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.contact-form h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 24px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: rgba(255,255,255,0.8);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-sm);
    color: white;
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary);
    background: rgba(255,255,255,0.12);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255,255,255,0.4);
}

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

/* ============================================
   底部Footer
   ============================================ */
.footer {
    background: #050d1a;
    color: rgba(255,255,255,0.6);
    padding: 60px 0 30px;
}

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

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255,255,255,0.5);
}

.footer-col h4 {
    color: white;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

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

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

.footer-col ul li a {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

/* ============================================
   页面通用样式
   ============================================ */
.page-banner {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #0a1628 0%, #1a3a5c 100%);
    text-align: center;
    color: white;
}

.page-banner h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
}

.page-banner p {
    font-size: 17px;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
    font-size: 14px;
    color: rgba(255,255,255,0.5);
}

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

/* 内容区域 */
.content-section {
    padding: 80px 0;
}

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

/* 特性列表 */
.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.feature-item {
    display: flex;
    gap: 16px;
    padding: 28px 24px;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: var(--transition);
    align-items: center;
}

.feature-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.feature-item-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--primary);
    flex-shrink: 0;
}

.feature-item-text h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
}

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

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
    padding: 24px 0;
}

.faq-item h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.faq-item h4::before {
    content: 'Q';
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}

.faq-item p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    padding-left: 40px;
}

/* 表格 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.data-table th,
.data-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background: var(--bg-light);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    font-size: 15px;
}

.data-table tr:hover td {
    background: var(--bg-light);
}

.price-tag {
    display: inline-block;
    padding: 4px 12px;
    background: #fff2f0;
    color: #ff4d4f;
    font-size: 14px;
    font-weight: 600;
    border-radius: 100px;
}

/* ============================================
   响应式设计
   ============================================ */

/* 平板端 */
@media (max-width: 1024px) {
    .container { padding: 0 20px; }
    .banner h1 { font-size: 40px; }
    .cloud-grid { grid-template-columns: repeat(2, 1fr); max-width: 100%; }
    .solution-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .banner-visual { display: none; }
    .section { padding: 80px 0; }
    .section-title { font-size: 32px; }
}

/* 移动端 */
@media (max-width: 768px) {
    /* 容器 */
    .container { padding: 0 16px; }

    /* 导航 */
    .header-inner { height: 60px; }
    .nav { display: none; }
    .mobile-toggle { display: flex; }
    .header-actions .btn-primary { 
        padding: 8px 16px; 
        font-size: 13px; 
    }

    /* Banner */
    .banner { 
        padding: 100px 0 56px; 
        min-height: auto; 
        text-align: center;
    }
    .banner-content { max-width: 100%; }
    .banner h1 { 
        font-size: 28px; 
        letter-spacing: -0.5px;
    }
    .banner-subtitle { 
        font-size: 15px; 
        margin-bottom: 28px;
    }
    .banner-badge { font-size: 12px; }
    .banner-actions { 
        justify-content: center;
        gap: 12px;
    }
    .banner-actions .btn-lg {
        padding: 12px 24px;
        font-size: 15px;
    }

    /* 通用section */
    .section { padding: 56px 0; }
    .section-header { margin-bottom: 36px; }
    .section-title { font-size: 24px; }
    .section-desc { font-size: 15px; }

    /* 产品卡片 */
    .product-grid { 
        grid-template-columns: 1fr 1fr; 
        gap: 16px;
    }
    .product-card { padding: 24px 20px; }
    .product-card h3 { font-size: 16px; }

    /* 云平台卡片 */
    .cloud-grid { 
        grid-template-columns: 1fr; 
        max-width: 100%; 
    }
    .cloud-card { padding: 24px 20px; }

    /* 解决方案卡片 */
    .solution-grid { 
        grid-template-columns: repeat(2, 1fr); 
        gap: 12px;
    }
    .solution-card { 
        aspect-ratio: unset;
        padding: 24px 16px;
    }
    .solution-card h3 { font-size: 15px; }

    /* 流程卡片 - 强制单列，水平布局 */
    .flow-grid { 
        grid-template-columns: 1fr !important; 
        gap: 12px; 
    }
    .flow-card { 
        padding: 20px 24px;
        flex-direction: row;
        align-items: center;
    }
    .flow-num {
        width: 40px;
        height: 40px;
        font-size: 18px;
        flex-shrink: 0;
    }
    .flow-card h3 { font-size: 16px; margin-bottom: 4px; }
    .flow-card p { font-size: 13px; }

    /* 联系卡片区域 */
    .contact-section > .container > div[style*="grid-template-columns:repeat(3"] {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }

    /* 底部联系cards三列改一列 */
    div[style*="grid-template-columns:repeat(3,1fr)"] {
        grid-template-columns: 1fr !important;
    }

    /* Footer - 紧凑版 */
    .footer { padding: 32px 0 20px; }
    .footer-grid { 
        grid-template-columns: 1fr 1fr;
        gap: 24px 20px;
    }
    .footer-brand { 
        grid-column: 1 / -1;
        max-width: 100%; 
    }
    .footer-brand p { font-size: 13px; line-height: 1.6; }
    .footer-col h4 { font-size: 14px; margin-bottom: 12px; }
    .footer-col ul li { margin-bottom: 8px; }
    .footer-col ul li a { font-size: 13px; }
    .footer-bottom { 
        flex-direction: column; 
        gap: 6px; 
        text-align: center; 
        font-size: 12px;
        padding-top: 16px;
        margin-top: 8px;
    }

    /* 页面Banner */
    .page-banner { padding: 100px 0 48px; }
    .page-banner h1 { font-size: 26px; }
    .page-banner p { font-size: 14px; }

    /* 内容区域 */
    .content-section { padding: 48px 0; }

    /* Feature列表 */
    .feature-list { 
        grid-template-columns: 1fr; 
        gap: 12px;
    }
    .feature-item { padding: 20px 16px; }

    /* 联系表单 */
    .contact-form { padding: 24px 20px; }

    /* FAQ */
    .faq-item h4 { font-size: 15px; }
    .faq-item p { font-size: 14px; padding-left: 32px; }

    /* 按钮 */
    .btn-lg { 
        padding: 12px 28px; 
        font-size: 15px; 
    }

    /* 数据表格横向滚动 */
    .data-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .data-table { min-width: 540px; }
    .data-table th, .data-table td { padding: 12px 14px; font-size: 13px; }

    /* 关于页数字卡片 */
    .solution-grid .solution-card .solution-icon { font-size: 28px; }
}

/* 小屏手机 */
@media (max-width: 390px) {
    .banner h1 { font-size: 24px; }
    .section-title { font-size: 22px; }
    .product-grid { grid-template-columns: 1fr; }
    .solution-grid { grid-template-columns: 1fr; }
    .banner-actions { flex-direction: column; align-items: center; }
    .banner-actions .btn { width: 100%; max-width: 280px; }
}

/* 移动端菜单展开 */
.nav.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: white;
    padding: 16px 20px;
    box-shadow: var(--shadow-md);
    gap: 0;
    z-index: 999;
}

.nav.active a {
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
}

.nav.active a:last-child {
    border-bottom: none;
}

/* 流程卡片 - 长方形 */
.flow-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.flow-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    transition: var(--transition);
    text-align: left;
    display: flex;
    align-items: flex-start;
    gap: 20px;
}
.flow-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}
.flow-num {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    flex-shrink: 0;
}
.flow-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}
.flow-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}
/* flow-grid mobile handled in main @media (max-width: 768px) block above */

/* 联系卡片 */
.contact-card {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
    color: white;
    text-decoration: none;
}
.contact-card:hover {
    background: rgba(255,255,255,0.12);
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(22,119,255,0.2);
}
.contact-card .contact-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 10px;
    font-size: 20px;
    box-shadow: 0 4px 12px rgba(22,119,255,0.3);
}
.contact-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}
.contact-card p {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
    margin: 0;
}