/* ============================
   金享物联官网 - 全局样式
   主题：深蓝金色 + 物联网科技感
   ============================ */

/* CSS变量定义 */
:root {
    /* 主色调 */
    --primary-navy: #1A2A6C;
    --primary-navy-light: #2D4A8C;
    --primary-gold: #C9A62C;
    --primary-gold-light: #E5C755;
    --accent-blue: #00BFFF;
    --accent-gradient: linear-gradient(135deg, #1A2A6C 0%, #2D4A8C 50%, #00BFFF 100%);
    
    /* 背景色 */
    --bg-dark: #0C1225;
    --bg-darker: #080D1A;
    --bg-card: rgba(26, 42, 108, 0.1);
    --bg-card-hover: rgba(26, 42, 108, 0.2);
    
    /* 文字色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.75);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* 边框 */
    --border-light: rgba(255, 255, 255, 0.1);
    --border-gold: rgba(201, 166, 44, 0.3);
    --border-navy: rgba(26, 42, 108, 0.5);
    
    /* 阴影 */
    --shadow-navy: 0 0 40px rgba(26, 42, 108, 0.3);
    --shadow-gold: 0 0 30px rgba(201, 166, 44, 0.2);
    
    /* 间距 */
    --section-padding: 100px 0;
    --container-padding: 0 20px;
    
    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

ul {
    list-style: none;
}

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

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

/* ============================
   导航栏
   ============================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(12, 18, 37, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
}

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

.logo img {
    height: 45px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
}

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

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gold);
    transition: var(--transition-normal);
}

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

/* 导航链接选中状态 */
.nav-links a.active {
    color: var(--primary-gold);
}

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

.btn-nav {
    padding: 10px 24px !important;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 100%);
    border: 1px solid var(--border-gold);
    border-radius: 25px;
    color: var(--primary-gold) !important;
}

.btn-nav:hover {
    background: var(--primary-gold);
    color: var(--primary-navy) !important;
}

.btn-nav::after {
    display: none !important;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-normal);
}

/* ============================
   Hero区域
   ============================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 80px;
}

#networkCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 20px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 25px;
    background: rgba(201, 166, 44, 0.1);
    border: 1px solid var(--border-gold);
    border-radius: 30px;
    margin-bottom: 30px;
}

.badge-icon {
    font-size: 1.2rem;
}

.hero-badge span:last-child {
    font-size: 0.9rem;
    color: var(--primary-gold);
    letter-spacing: 0.1em;
}

.hero-title {
    margin-bottom: 25px;
}

.text-navy {
    display: block;
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 900;
    color: var(--text-primary);
    text-shadow: 0 0 40px rgba(26, 42, 108, 0.5);
}

.text-small {
    display: block;
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 400;
    color: var(--primary-gold);
    letter-spacing: 0.15em;
    margin-top: 10px;
}

.hero-desc {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 36px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 100%);
    border: 1px solid var(--primary-gold);
    color: var(--primary-gold);
}

.btn-primary:hover {
    background: var(--primary-gold);
    color: var(--primary-navy);
    transform: translateY(-3px);
    box-shadow: var(--shadow-gold);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.btn-block {
    width: 100%;
}

/* Hero统计 */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

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

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-gold);
}

.stat-plus {
    font-size: 1.5rem;
    color: var(--primary-gold);
    margin-left: 2px;
}

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

/* 装饰节点 */
.hero-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.floating-node {
    position: absolute;
    width: 50px;
    height: 50px;
    background: rgba(26, 42, 108, 0.3);
    border: 1px solid var(--border-gold);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: float 6s ease-in-out infinite;
}

.floating-node svg {
    width: 24px;
    height: 24px;
    color: var(--primary-gold);
}

.node-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.node-2 {
    top: 30%;
    right: 15%;
    animation-delay: 2s;
}

.node-3 {
    bottom: 25%;
    left: 20%;
    animation-delay: 4s;
}

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

/* ============================
   通用区块头部
   ============================ */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header.light {
    color: white;
}

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(201, 166, 44, 0.1);
    border: 1px solid var(--border-gold);
    border-radius: 20px;
    font-size: 14px;
    color: var(--primary-gold);
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================
   系统简介
   ============================ */
.about {
    padding: var(--section-padding);
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

/* IoT图表 */
.about-visual {
    display: flex;
    justify-content: center;
}

.iot-diagram {
    position: relative;
    width: 350px;
    height: 350px;
}

.diagram-center {
    position: relative;
    width: 100%;
    height: 100%;
}

.center-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 100%);
    border: 2px solid var(--primary-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--primary-gold);
    box-shadow: var(--shadow-gold);
    z-index: 2;
}

.orbit {
    position: absolute;
    border: 1px dashed rgba(201, 166, 44, 0.3);
    border-radius: 50%;
    animation: orbit-rotate 20s linear infinite;
}

.orbit-1 {
    width: 180px;
    height: 180px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.orbit-2 {
    width: 260px;
    height: 260px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-direction: reverse;
    animation-duration: 25s;
}

.orbit-3 {
    width: 340px;
    height: 340px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-duration: 30s;
}

.orbit-node {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 16px;
    background: rgba(26, 42, 108, 0.8);
    border: 1px solid var(--primary-gold);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--primary-gold);
    white-space: nowrap;
}

@keyframes orbit-rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.about-content .section-tag {
    display: inline-block;
}

.about-content h2 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    line-height: 1.3;
    margin-bottom: 20px;
}

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

.about-features {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.feature-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: rgba(201, 166, 44, 0.1);
    border: 1px solid var(--border-gold);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary-gold);
}

.feature-text h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.feature-text p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ============================
   功能特性
   ============================ */
.features {
    padding: var(--section-padding);
    background: var(--bg-darker);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    padding: 35px 30px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.feature-card:hover {
    border-color: var(--border-gold);
    transform: translateY(-5px);
}

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

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.card-icon svg {
    width: 30px;
    height: 30px;
    color: var(--primary-gold);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.card-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.card-list li {
    font-size: 0.9rem;
    color: var(--text-muted);
    padding-left: 15px;
    position: relative;
}

.card-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-gold);
}

/* ============================
   应用场景
   ============================ */
.scenarios {
    padding: var(--section-padding);
    background: var(--bg-dark);
}

.scenarios-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 24px;
    overflow: hidden;
}

.scenario-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-light);
}

.tab-btn {
    flex: 1;
    padding: 20px;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    transition: var(--transition-normal);
    position: relative;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gold);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.tab-btn.active,
.tab-btn:hover {
    background: rgba(201, 166, 44, 0.05);
    color: var(--primary-gold);
}

.tab-btn.active::after {
    transform: scaleX(1);
}

.tab-icon {
    font-size: 1.8rem;
}

.tab-text {
    font-size: 0.95rem;
    font-weight: 500;
}

.scenario-content {
    padding: 50px;
}

.scenario-panel {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.scenario-panel.active {
    display: grid;
}

.visual-placeholder {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 100%);
    border-radius: 20px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-large {
    font-size: 6rem;
    opacity: 0.8;
}

.panel-info h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.panel-info > p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 25px;
    line-height: 1.7;
}

.panel-features {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.panel-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    color: var(--text-secondary);
}

.check-icon {
    width: 24px;
    height: 24px;
    background: rgba(201, 166, 44, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-gold);
    font-size: 0.8rem;
}

/* ============================
   技术架构
   ============================ */
.architecture {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--bg-darker) 100%);
}

.arch-diagram {
    max-width: 900px;
    margin: 0 auto;
}

.arch-layer {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 25px 30px;
    margin-bottom: 0;
}

.layer-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-gold);
    margin-bottom: 15px;
    text-align: center;
}

.layer-items {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.layer-items span {
    padding: 10px 20px;
    background: rgba(26, 42, 108, 0.3);
    border: 1px solid rgba(201, 166, 44, 0.2);
    border-radius: 25px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.arch-connector {
    display: flex;
    justify-content: center;
    padding: 10px 0;
}

.connector-line {
    width: 2px;
    height: 30px;
    background: linear-gradient(180deg, var(--primary-gold), transparent);
}

/* ============================
   联系我们
   ============================ */
.contact {
    padding: var(--section-padding);
    background: var(--bg-darker);
}

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

.contact-info .section-tag {
    margin-bottom: 20px;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.contact-info > p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.info-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.info-icon {
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-navy-light) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-item strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 3px;
    color: var(--text-muted);
}

.info-item p {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 24px;
    padding: 40px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23C9A62C' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
}

.form-group select option {
    background: var(--bg-darker);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-gold);
    background: rgba(201, 166, 44, 0.05);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

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

/* ============================
   Footer
   ============================ */
.footer {
    padding: 60px 0 30px;
    background: var(--bg-darker);
    border-top: 1px solid var(--border-light);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 350px;
}

.footer-logo {
    height: 50px;
    margin-bottom: 15px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 5px;
}

.footer-slogan {
    color: var(--primary-gold) !important;
    font-size: 0.9rem !important;
}

.footer-links {
    display: flex;
    gap: 80px;
}

.link-group h5 {
    font-size: 1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.link-group a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.link-group a:hover {
    color: var(--primary-gold);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-light);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 备案信息样式 */
.beian-info {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.beian-info a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--text-muted);
    font-size: 12px;
    transition: var(--transition-fast);
}

.beian-info span {
    display: inline-flex;
    align-items: center;
}

.beian-info a:hover {
    color: var(--text-secondary);
}

.beian-info img {
    width: 14px;
    height: 14px;
}

/* ============================
   动画效果
   ============================ */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos].aos-animate[data-aos="fade-right"],
[data-aos].aos-animate[data-aos="fade-left"] {
    transform: translateX(0);
}

[data-aos].aos-animate[data-aos="zoom-in"] {
    transform: scale(1);
}

/* ============================
   响应式设计 - 移动端适配
   ============================ */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .about-visual {
        order: -1;
    }
    
    .iot-diagram {
        width: 300px;
        height: 300px;
    }
    
    .orbit-1 { width: 150px; height: 150px; }
    .orbit-2 { width: 220px; height: 220px; }
    .orbit-3 { width: 290px; height: 290px; }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scenario-panel {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .visual-placeholder {
        height: 200px;
    }
    
    .icon-large {
        font-size: 4rem;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }
    
    /* 导航栏移动端 */
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 75px;
        left: 0;
        right: 0;
        background: rgba(12, 18, 37, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 30px 20px;
        gap: 20px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
        border-bottom: 1px solid var(--border-light);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links a {
        font-size: 18px;
        padding: 10px 0;
    }
    
    .btn-nav {
        text-align: center;
    }
    
    /* Hero移动端 */
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 280px;
        margin: 0 auto 40px;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .floating-node {
        display: none;
    }
    
    /* 功能网格 */
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card {
        padding: 30px 25px;
    }
    
    /* 场景Tab */
    .scenario-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1 1 50%;
        padding: 15px 10px;
    }
    
    .tab-icon {
        font-size: 1.4rem;
    }
    
    .tab-text {
        font-size: 0.85rem;
    }
    
    .scenario-content {
        padding: 30px 20px;
    }
    
    /* 架构图 */
    .layer-items {
        gap: 10px;
    }
    
    .layer-items span {
        padding: 8px 15px;
        font-size: 0.8rem;
    }
    
    /* 联系 */
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-form {
        padding: 30px 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    /* Footer */
    .footer-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .text-navy {
        font-size: 2.2rem;
    }
    
    .text-small {
        font-size: 1rem;
        letter-spacing: 0.1em;
    }
    
    .hero-badge {
        padding: 8px 16px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .iot-diagram {
        width: 250px;
        height: 250px;
    }
    
    .center-core {
        width: 80px;
        height: 80px;
        font-size: 0.85rem;
    }
    
    .orbit-1 { width: 130px; height: 130px; }
    .orbit-2 { width: 180px; height: 180px; }
    .orbit-3 { width: 230px; height: 230px; }
    
    .orbit-node {
        padding: 6px 12px;
        font-size: 0.7rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .panel-info h3 {
        font-size: 1.4rem;
    }
}