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

body {
    font-family: 'Inter', sans-serif;
    background-color: #FFFFFF;
    color: #0B1E33;
    line-height: 1.5;
    overflow-x: hidden;
    position: relative;
}

/* 科幻网格背景 & 光晕元素 */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        linear-gradient(#EFF5FF 1px, transparent 1px),
        linear-gradient(90deg, #EFF5FF 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: -1;
    opacity: 0.3;
}

.glow-circle {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle at 30% 30%, rgba(0,102,255,0.08), transparent 70%);
    border-radius: 50%;
    top: -200px;
    right: -100px;
    z-index: -1;
    filter: blur(60px);
}

.glow-circle2 {
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0,170,255,0.05), transparent 70%);
    bottom: -200px;
    left: -200px;
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    z-index: -1;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    position: relative;
    z-index: 2;
}

/* 导航 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 28px;
    flex-wrap: wrap;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    border-bottom: 2px solid rgba(0, 102, 255, 0.2);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.05);
    margin-top: 0;
    border-radius: 0;
    transition: all 0.2s;
}

.nav-links a {
    font-weight: 600;
    letter-spacing: 0.3px;
    position: relative;
    padding-bottom: 4px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #0066FF;
    transition: width 0.2s;
}

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

.btn-outline, .btn-solid {
    border-radius: 30px;
}

.logo {
    font-size: 1.9rem;
    font-weight: 800;
    background: linear-gradient(145deg, #0044CC, #0066FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.logo span {
    background: linear-gradient(145deg, #2A6DF4, #6AA9FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 600;
}

.nav-links {
    display: flex;
    gap: 28px;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    color: #113355;
    font-weight: 500;
    transition: 0.2s;
    font-size: 1rem;
}

.nav-links a:hover {
    color: #0066FF;
}

.btn-outline {
    border: 1.5px solid #0066FF;
    border-radius: 40px;
    padding: 8px 22px;
    font-weight: 600;
    color: #0066FF !important;
    background: rgba(255,255,255,0.5);
    backdrop-filter: blur(4px);
}

.btn-outline:hover {
    background: #0066FF;
    color: #fff !important;
    border-color: #0066FF;
}

.btn-solid {
    background: linear-gradient(145deg, #0066FF, #0044CC);
    border-radius: 40px;
    padding: 8px 26px;
    font-weight: 600;
    color: #fff !important;
    border: none;
    box-shadow: 0 8px 16px -6px #0066FF66;
}

.btn-solid:hover {
    background: linear-gradient(145deg, #0044CC, #003399);
    box-shadow: 0 10px 20px -4px #0066FFAA;
}

html {
    scroll-behavior: smooth;
}

/* hero */
.hero {
    display: flex;
    align-items: center;
    gap: 40px;
    padding: 50px 0 80px;
    flex-wrap: wrap;
    position: relative;
}

.hero-content {
    flex: 1 1 45%;
}

.hero-content h1 {
    font-size: 3.4rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
    color: #0A1A2F;
    margin-bottom: 24px;
}

.hero-highlight {
    background: linear-gradient(145deg, #0066FF, #2A6DF4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    border-bottom: 3px solid rgba(0,102,255,0.3);
}

.hero-sub {
    font-size: 1.25rem;
    color: #2D4259;
    max-width: 550px;
    margin-bottom: 32px;
    backdrop-filter: blur(2px);
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin: 40px 0 20px;
}

.stat-item h3 {
    font-size: 2.1rem;
    font-weight: 700;
    background: linear-gradient(145deg, #0066FF, #2A6DF4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-visual {
    flex: 1 1 45%;
    background: rgba(255,255,255,0.5);
    backdrop-filter: blur(12px);
    border-radius: 48px;
    padding: 30px;
    box-shadow: 0 30px 50px -20px rgba(0,102,255,0.4);
    border: 1px solid rgba(0,102,255,0.25);
    min-height: 340px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-visual::after {
    content: "";
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, #6AA9FF30, transparent 70%);
    top: -40px;
    right: -40px;
    border-radius: 50%;
    z-index: -1;
}

.feature-icons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.icon-card {
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(8px);
    border-radius: 28px;
    padding: 20px 10px;
    text-align: center;
    box-shadow: 0 8px 20px -8px #0066FF40;
    font-weight: 600;
    border: 1px solid rgba(0,102,255,0.2);
    transition: 0.15s;
}

.icon-card i {
    font-size: 2.4rem;
    background: linear-gradient(145deg, #0066FF, #2A6DF4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.icon-card:hover {
    border-color: #0066FF;
    transform: scale(1.02);
}

.trust-bar {
    background: rgba(0,102,255,0.05);
    backdrop-filter: blur(10px);
    padding: 16px 0;
    text-align: center;
    font-weight: 500;
    color: #113355;
    border-radius: 60px;
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    border: 1px solid rgba(0,102,255,0.2);
}

.section-title {
    text-align: center;
    margin: 70px 0 40px;
}

.section-title h2 {
    font-size: 2.6rem;
    font-weight: 700;
    color: #0A1A2F;
}

.section-title p {
    font-size: 1.2rem;
    color: #2D4259;
    max-width: 700px;
    margin: 16px auto 0;
}

/* 卡片科技感 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
    margin: 40px 0;
}

.feature-card {
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(0,102,255,0.2);
    border-radius: 32px;
    padding: 30px 20px;
    transition: all 0.2s ease;
    box-shadow: 0 10px 25px -12px rgba(0,102,255,0.2);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: #0066FF;
    box-shadow: 0 25px 35px -14px #0066FF80;
}

.feature-card i {
    font-size: 2.6rem;
    background: linear-gradient(145deg, #0066FF, #2A6DF4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 18px;
}

.feature-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: #0B1E33;
}

.feature-card p {
    color: #2D4259;
    font-size: 0.95rem;
}

/* AIOT 科幻面板 */
.aiot-showcase {
    background: linear-gradient(145deg, #0A1F33, #0C2942);
    color: white;
    border-radius: 60px;
    padding: 60px 50px;
    margin: 60px 0;
    box-shadow: 0 30px 40px -15px #0066FF, 0 0 0 1px #2A6DF4 inset;
    position: relative;
    overflow: hidden;
}

.aiot-showcase::before {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" opacity="0.1"><path d="M10 10 L 90 10 L 90 90 L 10 90 Z" stroke="%2344aaff" fill="none" stroke-width="0.8"/><path d="M20 20 L 80 20 L 80 80 L 20 80 Z" stroke="%233399ff" fill="none" stroke-width="0.6"/></svg>');
    background-size: 40px 40px;
    pointer-events: none;
    opacity: 0.2;
}

.aiot-showcase h2 {
    font-size: 2.3rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.aiot-showcase h2 i {
    color: #6AA9FF;
}

.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin: 40px 0 10px;
}

.device-item {
    background: rgba(255,255,255,0.08);
    border-radius: 40px;
    padding: 18px 8px;
    text-align: center;
    backdrop-filter: blur(8px);
    font-weight: 500;
    border: 1px solid rgba(106, 169, 255, 0.3);
}

/* 新闻博客区域 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin: 40px 0;
}

.news-card {
    background: white;
    border-radius: 32px;
    padding: 24px;
    box-shadow: 0 15px 30px -15px rgba(0,102,255,0.3);
    border: 1px solid rgba(0,102,255,0.15);
    transition: 0.2s;
}

.news-card:hover {
    border-color: #0066FF;
    transform: translateY(-5px);
}

.news-date {
    color: #0066FF;
    font-weight: 600;
    margin-bottom: 12px;
}

.news-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #0B1E33;
}

.news-desc {
    color: #3A4F66;
    margin-bottom: 20px;
}

.news-link {
    color: #0066FF;
    font-weight: 600;
    text-decoration: none;
}

.news-link i {
    transition: 0.2s;
}

.news-link:hover i {
    transform: translateX(5px);
}

/* 末示云商城利润区块 */
.profit-block {
    background: linear-gradient(110deg, #F0F7FF, #FFFFFF, #E6F0FF);
    border-radius: 50px;
    padding: 50px 40px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
    margin: 50px 0;
    border: 1px solid rgba(0,102,255,0.25);
    box-shadow: 0 20px 40px -20px #0066FF;
}

.profit-text {
    flex: 2;
}

.profit-text h3 {
    font-size: 2.3rem;
    font-weight: 700;
    background: linear-gradient(145deg, #0044CC, #0066FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.profit-stats {
    flex: 1;
    background: white;
    border-radius: 38px;
    padding: 30px;
    text-align: center;
    border: 1px solid #0066FF40;
}

/* FAQ */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin: 40px 0;
}

.faq-item {
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(0,102,255,0.2);
    border-radius: 30px;
    padding: 26px;
    box-shadow: 0 10px 20px -12px #0066FF40;
}

.faq-item h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: #0B1E33;
}

/* CTA */
.cta-section {
    background: linear-gradient(145deg, #0066FF, #0044CC);
    border-radius: 60px;
    padding: 70px 40px;
    text-align: center;
    color: white;
    margin: 70px 0 50px;
    box-shadow: 0 30px 40px -15px #0066FF;
    position: relative;
    overflow: hidden;
}

.cta-section::after {
    content: "";
    position: absolute;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    top: -100px;
    right: -100px;
}

.cta-button {
    background: white;
    color: #0066FF;
    border-radius: 60px;
    padding: 16px 52px;
    font-size: 1.3rem;
    font-weight: 700;
    margin-top: 30px;
    display: inline-block;
    text-decoration: none;
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.footer {
    border-top: 1px solid rgba(0,102,255,0.2);
    padding: 40px 0;
    margin-top: 30px;
    color: #2D4259;
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 16px;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
    .news-grid {
        grid-template-columns: 1fr;
    }
    .faq-grid {
        grid-template-columns: 1fr;
    }
}
/* ========= 演示申请模态框样式 ========= */
.demo-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}
.demo-modal-content {
    background: #fff;
    max-width: 550px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    border-radius: 32px;
    padding: 30px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}
.demo-modal-close {
    position: absolute;
    top: 20px;
    right: 25px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: #aaa;
}
.demo-modal-close:hover {
    color: #000;
}
.demo-form-group {
    margin-bottom: 18px;
}
.demo-form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: #0B1E33;
}
.demo-form-group input,
.demo-form-group select,
.demo-form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ccc;
    border-radius: 16px;
    font-family: inherit;
    font-size: 14px;
}
.demo-submit-btn {
    background: linear-gradient(145deg, #0066FF, #0044CC);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 40px;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    font-size: 16px;
}
.demo-submit-btn:hover {
    background: linear-gradient(145deg, #0044CC, #003399);
}
#demoFormMessage {
    margin-top: 15px;
    text-align: center;
    font-size: 14px;
}
.logo img {
    max-height: 50px;
    width: auto;
    vertical-align: middle;
}
/* 下拉菜单样式 */
.dropdown {
    position: relative;
    display: inline-block;
}
.dropdown .dropbtn {
    font-weight: 600;
    letter-spacing: 0.3px;
    position: relative;
    padding-bottom: 4px;
    color: #113355;
    text-decoration: none;
}
.dropdown-content {
    display: none;
    position: absolute;
    background-color: white;
    min-width: 160px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    border-radius: 16px;
    z-index: 1;
    top: 100%;
    left: 0;
}
.dropdown-content a {
    color: #113355 !important;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}
.dropdown-content a:hover {
    background-color: #f0f7ff;
    color: #0066FF !important;
}
.dropdown:hover .dropdown-content {
    display: block;
}
/* ========= 手机端自适应优化（简单有效） ========= */
@media (max-width: 768px) {
    /* 1. 整体容器左右边距减小 */
    .container {
        padding: 0 16px;
    }
    
    /* 2. 导航栏改为垂直排列，且菜单项换行居中 */
    .navbar {
        flex-direction: column;
        gap: 12px;
        padding: 12px 16px;
    }
    .nav-links {
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
    }
    
    /* 3. Hero 区域改为上下排列（图片在上方或下方） */
    .hero {
        flex-direction: column;
        padding: 30px 0 50px;
        gap: 30px;
    }
    .hero-content, .hero-visual {
        flex: auto;
        width: 100%;
    }
    .hero-content h1 {
        font-size: 2rem;
    }
    .hero-stats {
        justify-content: space-between;
        gap: 15px;
    }
    .stat-item h3 {
        font-size: 1.4rem;
    }
    
    /* 4. 右侧图标卡片：手机屏幕仍保持3列，但内边距缩小 */
    .feature-icons {
        gap: 12px;
    }
    .icon-card {
        padding: 12px 6px;
        font-size: 0.8rem;
    }
    .icon-card i {
        font-size: 1.8rem;
    }
    
    /* 5. 下面的功能卡片、新闻、FAQ、商城区块都变成单列 */
    .feature-grid,
    .news-grid,
    .faq-grid,
    .device-grid {
        grid-template-columns: 1fr;
    }
    
    /* 6. 利润区块和AIoT展示区域内边距减小 */
    .profit-block,
    .aiot-showcase,
    .cta-section {
        padding: 30px 20px;
    }
    .profit-text h3 {
        font-size: 1.6rem;
    }
    .aiot-showcase h2 {
        font-size: 1.6rem;
    }
    .cta-button {
        padding: 12px 30px;
        font-size: 1rem;
    }
    
    /* 7. 底部版权文字适当缩小 */
    .footer {
        padding: 30px 0 20px;
    }
    .footer > div:first-child {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    .footer .logo {
        font-size: 1.4rem;
    }
}

/* 针对更小屏幕（宽度小于480px）进一步优化 */
@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.6rem;
    }
    .hero-sub {
        font-size: 1rem;
    }
    .btn-solid, .btn-outline {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
    .icon-card {
        padding: 8px 4px;
        font-size: 0.7rem;
    }
    .icon-card i {
        font-size: 1.5rem;
    }
    .section-title h2 {
        font-size: 1.8rem;
    }
}