/* ==========================================
   ESI 卫星代工工厂 - 统一样式表
   设计风格：科技感、未来感、高端大气
   配色：纯蓝/青，无任何红褐色
   ========================================== */

/* 导入字体 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ==========================================
   CSS 变量 - 纯蓝色系
   ========================================== */
:root {
    --primary: #0066FF;
    --primary-dark: #0052CC;
    --primary-light: #3D8BFF;
    --secondary: #00D4AA;
    --accent: #0099FF;
    --dark: #050d1a;
    --dark-light: #0d1829;
    --gray: #64748B;
    --light: #F1F5F9;
    --white: #FFFFFF;
    --gradient: linear-gradient(135deg, #0066FF 0%, #00D4AA 100%);
    --gradient-dark: linear-gradient(135deg, #050d1a 0%, #0d1829 50%, #050d1a 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 30px rgba(0, 102, 255, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   全局重置与基础样式
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #050d1a;
    color: var(--light);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 移动端CTA只在展开菜单中显示 */
.nav-mobile-cta {
    display: none;
}

@media (max-width: 992px) {
    .nav-mobile-cta {
        display: block;
        padding-top: 0.5rem;
        border-top: 1px solid rgba(0,102,255,0.15);
        margin-top: 0.5rem;
    }
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
}

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

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

/* ==========================================
   太空背景 - 卫星图 + 深色遮罩
   ========================================== */
.stars-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background-color: #050d1a;
    background-image:
        linear-gradient(180deg, rgba(5, 13, 26, 0.55) 0%, rgba(5, 13, 26, 0.75) 100%),
        url('assets/bg-satellite.jpg');
    background-attachment: fixed;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
}

/* 星空粒子层 */
.stars-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,0.8) 0%, transparent 100%),
        radial-gradient(1px 1px at 25% 35%, rgba(255,255,255,0.6) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 40% 10%, rgba(200,220,255,0.9) 0%, transparent 100%),
        radial-gradient(1px 1px at 55% 55%, rgba(255,255,255,0.5) 0%, transparent 100%),
        radial-gradient(2px 2px at 70% 25%, rgba(150,200,255,1) 0%, transparent 100%),
        radial-gradient(1px 1px at 85% 45%, rgba(255,255,255,0.7) 0%, transparent 100%),
        radial-gradient(1px 1px at 15% 75%, rgba(255,255,255,0.4) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 30% 60%, rgba(200,210,255,0.8) 0%, transparent 100%),
        radial-gradient(1px 1px at 50% 85%, rgba(255,255,255,0.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 65% 70%, rgba(255,255,255,0.5) 0%, transparent 100%),
        radial-gradient(1px 1px at 80% 80%, rgba(200,220,255,0.7) 0%, transparent 100%),
        radial-gradient(1px 1px at 90% 10%, rgba(255,255,255,0.8) 0%, transparent 100%),
        radial-gradient(1px 1px at 5% 50%, rgba(255,255,255,0.5) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 35% 90%, rgba(180,210,255,0.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 75% 5%, rgba(255,255,255,0.7) 0%, transparent 100%),
        radial-gradient(1px 1px at 20% 40%, rgba(220,235,255,0.5) 0%, transparent 100%),
        radial-gradient(1px 1px at 95% 65%, rgba(255,255,255,0.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 45% 30%, rgba(200,220,255,0.8) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 60% 45%, rgba(255,255,255,0.7) 0%, transparent 100%),
        radial-gradient(1px 1px at 8% 88%, rgba(220,240,255,0.5) 0%, transparent 100%);
    opacity: 0.6;
}

/* 响应式背景 */
@media (max-width: 768px) {
    .stars-bg {
        background-attachment: scroll;
        position: absolute;
        height: auto;
        min-height: 100%;
    }
}

/* ==========================================
   导航栏 - 玻璃态效果
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(5, 13, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 102, 255, 0.15);
    padding: 0 2rem;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 0.4rem 2rem;
    background: rgba(5, 13, 26, 0.97);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    transition: var(--transition);
}

.navbar.scrolled .nav-container {
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: var(--white);
}

.brand-logo {
    width: 50px;
    height: 50px;
    background: var(--gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-glow);
    transition: var(--transition);
}

.brand-logo::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: logoShine 3s infinite;
}

@keyframes logoShine {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.brand-tagline {
    font-size: 0.75rem;
    color: var(--secondary);
    text-transform: uppercase;
    letter-spacing: 3px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--white);
    background: rgba(0, 102, 255, 0.15);
}

/* 语言切换 */
.lang-switch {
    display: flex;
    gap: 0.25rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.35rem;
    border-radius: var(--radius-sm);
}

.lang-btn {
    padding: 0.5rem 0.75rem;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.lang-btn.active,
.lang-btn:hover {
    background: var(--primary);
    color: var(--white);
}

/* CTA按钮 */
.cta-btn {
    background: var(--gradient);
    color: var(--white);
    padding: 0.85rem 2rem;
    border: none;
    border-radius: var(--radius-xl);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
    font-family: inherit;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 102, 255, 0.4);
}

.cta-btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    box-shadow: none;
}

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

/* nav-actions 容器 */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: transparent !important;
    border: 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;
    flex-shrink: 0;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--white);
    transition: var(--transition);
    border-radius: 2px;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================
   Hero 区域
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 2rem 4rem;
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 1s ease;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid rgba(0, 212, 170, 0.3);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    color: var(--secondary);
    margin-bottom: 1.5rem;
}

.hero-badge i {
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--white) 0%, rgba(255,255,255,0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title .highlight {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2rem;
    max-width: 600px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* 统计数据 */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    text-align: left;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ==========================================
   内容区域通用样式
   ========================================== */
.section {
    padding: 6rem 2rem;
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ==========================================
   解决方案卡片
   ========================================== */
.solutions {
    padding: 6rem 2rem;
    background: var(--dark-light);
}

.solutions-container {
    max-width: 1400px;
    margin: 0 auto;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.solution-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    padding: 2.5rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(0, 102, 255, 0.3);
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.15);
}

.solution-card:hover::before {
    opacity: 1;
}

.solution-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.2) 0%, rgba(0, 212, 170, 0.2) 100%);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
    color: var(--white);
}

.solution-card:hover .solution-icon {
    transform: scale(1.1) rotate(5deg);
    background: var(--gradient);
}

.solution-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.solution-description {
    font-size: 1rem;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.solution-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: gap 0.3s ease;
    font-size: 0.95rem;
}

.solution-link:hover {
    gap: 1rem;
}

/* ==========================================
   核心优势
   ========================================== */
.advantages {
    padding: 8rem 2rem;
    background: var(--dark);
    position: relative;
}

.advantages-container {
    max-width: 1400px;
    margin: 0 auto;
}

.advantages-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.advantages-content {
    padding-right: 4rem;
}

.advantages-content .section-header {
    text-align: left;
    margin-bottom: 2rem;
}

.advantages-content .section-subtitle {
    margin: 0;
}

.advantages-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 3rem;
}

.advantage-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    transition: all 0.3s ease;
}

.advantage-item:hover {
    background: rgba(0, 102, 255, 0.08);
    border-color: rgba(0, 102, 255, 0.2);
    transform: translateX(5px);
}

.advantage-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
    color: var(--white);
}

.advantage-text h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 0.25rem;
}

.advantage-text p {
    font-size: 0.9rem;
    color: var(--gray);
}

.advantages-visual {
    position: relative;
}

.advantage-card {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.12) 0%, rgba(0, 212, 170, 0.08) 100%);
    border: 1px solid rgba(0, 102, 255, 0.15);
    border-radius: 30px;
    padding: 3rem;
    text-align: center;
}

.advantage-card-icon {
    font-size: 6rem;
    margin-bottom: 1.5rem;
    display: block;
    color: var(--white);
}

.advantage-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.advantage-card p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

/* ==========================================
   CTA 区域
   ========================================== */
.cta-section {
    padding: 6rem 2rem;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.15) 0%, rgba(0, 212, 170, 0.08) 100%);
    position: relative;
    overflow: hidden;
}

.cta-container {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================
   页脚
   ========================================== */
.footer {
    background: var(--dark);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 4rem 2rem 2rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

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

.footer-brand .brand-logo {
    width: 45px;
    height: 45px;
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-column h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 1.5rem;
}

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

.footer-column li {
    margin-bottom: 0.75rem;
}

.footer-column a {
    color: var(--gray);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray);
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-links a:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-3px);
}

/* ==========================================
   返回顶部按钮
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient);
    border-radius: 50%;
    border: none;
    color: var(--white);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 102, 255, 0.6);
}

/* ==========================================
   动画效果
   ========================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================
   响应式设计 - 全面适配手机端（移动优先优化）
   ========================================== */

/* 移动端基础优化（992px以下 - 包含平板和手机） */
@media (max-width: 992px) {
    /* 汉堡菜单按钮 */
    .mobile-menu-btn {
        display: flex;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 8px;
        flex-shrink: 0;
    }
    .mobile-menu-btn span {
        display: block;
        width: 22px;
        height: 2px;
        background: var(--white);
        margin: 4px 0;
        transition: all 0.3s ease;
        border-radius: 2px;
    }
    .mobile-menu-btn.active span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }

    /* 移动端导航菜单 */
    .nav-links {
        display: none;
        position: fixed;
        top: 57px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(5, 13, 26, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1rem;
        margin: 0;
        gap: 0;
        z-index: 998;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        border: 2px solid red;  /* 调试用：确认菜单是否渲染 */
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        width: 100%;
        margin-bottom: 0.25rem;
        list-style: none;
    }

    .nav-links a {
        display: flex !important;
        align-items: center;
        padding: 1rem 1.2rem;
        font-size: 1.05rem !important;
        border-radius: 10px;
        width: 100%;
        text-align: left;
        min-height: 48px;
        line-height: 1.5;
        color: #ffffff !important;
        text-decoration: none;
    }

    .nav-links a:hover,
    .nav-links a.active {
        color: var(--white);
        background: rgba(0, 102, 255, 0.2);
    }

    /* 隐藏桌面端 nav-actions */
    .nav-actions { display: none; }

    /* 导航容器 */
    .nav-container {
        height: 57px;
        padding: 0;
    }
}

/* 手机端进一步优化（768px以下） */
@media (max-width: 768px) {
    html { font-size: 14px; }

    /* 导航栏压缩 */
    .navbar { padding: 0 1rem; }

    /* 品牌缩小 */
    .brand-logo { width: 38px !important; height: 38px !important; font-size: 0.9rem !important; border-radius: 8px !important; }
    .brand-name { font-size: 0.95rem !important; letter-spacing: 1px !important; }
    .brand-tagline { display: none !important; }

    /* 隐藏桌面端 nav-actions */
    .nav-actions { display: none !important; }

    /* Hero 区域 - 移动端单列 */
    .hero {
        padding: 4rem 1rem 2rem !important;
        min-height: auto !important;
    }

    .hero-container {
        max-width: 100% !important;
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
    }

    .hero-badge {
        padding: 0.4rem 0.8rem !important;
        font-size: 0.75rem !important;
        margin-bottom: 1rem !important;
    }

    .hero-title {
        font-size: 1.65rem !important;
        line-height: 1.25 !important;
        margin-bottom: 1rem !important;
    }

    .hero-description {
        font-size: 0.9rem !important;
        margin-bottom: 1.5rem !important;
        line-height: 1.7 !important;
    }

    .hero-buttons {
        flex-direction: column !important;
        align-items: center !important;
        gap: 0.75rem !important;
        width: 100% !important;
    }

    .hero-buttons .cta-btn {
        width: 100% !important;
        max-width: 300px !important;
        justify-content: center !important;
        padding: 0.85rem 1.5rem !important;
        font-size: 0.9rem !important;
    }

    .hero-stats {
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
        gap: 1rem !important;
        margin-top: 2rem !important;
        padding-top: 2rem !important;
        width: 100% !important;
    }

    .stat-item { text-align: center !important; }
    .stat-value { font-size: 1.5rem !important; }
    .stat-label { font-size: 0.75rem !important; }

    /* 通用区块 - 移动端压缩 */
    .section { padding: 3rem 1rem !important; }
    .section-title { font-size: 1.5rem !important; }
    .section-subtitle { font-size: 0.9rem !important; }
    .section-header { margin-bottom: 2.5rem !important; }

    /* 解决方案 - 移动端单列 */
    .solutions { padding: 3rem 1rem !important; }
    .solutions-grid { grid-template-columns: 1fr !important; gap: 1.25rem !important; }

    .solution-card {
        padding: 1.5rem !important;
        border-radius: 16px !important;
    }
    .solution-icon { width: 50px !important; height: 50px !important; font-size: 1.5rem !important; border-radius: 12px !important; margin-bottom: 1rem !important; }
    .solution-title { font-size: 1.15rem !important; margin-bottom: 0.75rem !important; }
    .solution-description { font-size: 0.9rem !important; margin-bottom: 1rem !important; line-height: 1.6 !important; }
    .solution-link { font-size: 0.9rem !important; }

    /* 优势区域 - 移动端单列 */
    .advantages { padding: 3rem 1rem !important; }
    .advantages-grid { grid-template-columns: 1fr !important; gap: 2rem !important; }
    .advantages-content { padding-right: 0 !important; }
    .advantages-content .section-header { text-align: center !important; }

    .advantage-item { padding: 1rem !important; border-radius: 12px !important; gap: 1rem !important; }
    .advantage-icon { width: 42px !important; height: 42px !important; font-size: 1rem !important; border-radius: 10px !important; flex-shrink: 0; }
    .advantage-text h4 { font-size: 1rem !important; }
    .advantage-text p { font-size: 0.85rem !important; }

    .advantage-card {
        padding: 2rem 1.5rem !important;
        border-radius: 20px !important;
    }
    .advantage-card-icon { font-size: 3.5rem !important; margin-bottom: 1rem !important; }
    .advantage-card h3 { font-size: 1.2rem !important; }
    .advantage-card p { font-size: 0.9rem !important; line-height: 1.6 !important; }

    /* CTA区域 - 移动端优化 */
    .cta-section { padding: 3rem 1rem !important; }
    .cta-title { font-size: 1.35rem !important; }
    .cta-description { font-size: 0.9rem !important; margin-bottom: 1.5rem !important; }
    .cta-buttons {
        flex-direction: column !important;
        align-items: center !important;
        gap: 0.75rem !important;
    }
    .cta-btn {
        width: 100% !important;
        max-width: 300px !important;
        justify-content: center !important;
        padding: 0.85rem 1.5rem !important;
        font-size: 0.9rem !important;
    }

    /* 产品区域 - 移动端单列 */
    .products-section { padding: 3rem 1rem !important; }
    .products-grid { grid-template-columns: 1fr !important; gap: 1.25rem !important; margin-top: 2rem !important; }

    .product-card { padding: 1.5rem !important; border-radius: 16px !important; }
    .product-icon { width: 55px !important; height: 55px !important; font-size: 1.75rem !important; border-radius: 14px !important; margin-bottom: 1rem !important; }
    .product-card h3 { font-size: 1.15rem !important; margin-bottom: 0.75rem !important; }
    .product-card p { font-size: 0.9rem !important; margin-bottom: 1rem !important; }
    .product-features li { font-size: 0.9rem !important; }

    /* 规格表格 - 移动端横向滚动 */
    .spec-table-wrapper {
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        border-radius: 12px !important;
        margin-top: 2rem !important;
    }

    .spec-table {
        min-width: 600px !important;
        font-size: 0.85rem !important;
    }

    .spec-table th { padding: 0.85rem 1rem !important; font-size: 0.85rem !important; }
    .spec-table td { padding: 0.75rem 1rem !important; font-size: 0.85rem !important; }

    /* 联系区域 - 移动端单列 */
    .contact-section { padding: 3rem 1rem !important; }
    .contact-grid { grid-template-columns: 1fr !important; gap: 2rem !important; margin-top: 2rem !important; }

    .contact-info-card { padding: 1.5rem !important; border-radius: 16px !important; }
    .contact-info-item { padding-bottom: 1.25rem !important; margin-bottom: 1.25rem !important; }
    .contact-icon { width: 42px !important; height: 42px !important; font-size: 1rem !important; border-radius: 10px !important; flex-shrink: 0; }
    .contact-info-text h4 { font-size: 1rem !important; }
    .contact-info-text p { font-size: 0.85rem !important; }

    .contact-form { padding: 1.5rem !important; border-radius: 16px !important; }
    .form-group { margin-bottom: 1rem !important; }
    .form-group label { font-size: 0.9rem !important; }
    .form-control { padding: 0.85rem 1rem !important; font-size: 0.95rem !important; border-radius: 10px !important; }
    textarea.form-control { min-height: 120px !important; }

    /* 技术区域 - 移动端单列 */
    .tech-section { padding: 3rem 1rem !important; }
    .tech-grid { grid-template-columns: 1fr !important; gap: 1.25rem !important; margin-top: 2rem !important; }

    .tech-card { padding: 1.5rem !important; border-radius: 16px !important; }
    .tech-icon { width: 50px !important; height: 50px !important; font-size: 1.5rem !important; border-radius: 12px !important; margin-bottom: 1rem !important; }
    .tech-card h3 { font-size: 1.15rem !important; margin-bottom: 0.75rem !important; }
    .tech-card p { font-size: 0.9rem !important; }

    /* 流程/服务/使命区域 - 移动端单列 */
    .process-grid, .service-grid, .mission-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
        margin-top: 2rem !important;
    }

    .process-card { padding: 1.5rem !important; border-radius: 16px !important; }
    .process-number { width: 42px !important; height: 42px !important; font-size: 1.2rem !important; margin-bottom: 1rem !important; }
    .process-card h3 { font-size: 1.05rem !important; margin-bottom: 0.75rem !important; }
    .process-card p { font-size: 0.85rem !important; }

    .service-card { padding: 1.5rem !important; border-radius: 16px !important; }
    .service-icon { width: 50px !important; height: 50px !important; font-size: 1.5rem !important; border-radius: 12px !important; margin-bottom: 1rem !important; }
    .service-card h3 { font-size: 1.15rem !important; margin-bottom: 0.75rem !important; }
    .service-card p { font-size: 0.9rem !important; }

    .mission-card { padding: 1.5rem !important; border-radius: 16px !important; }
    .mission-icon { font-size: 2.5rem !important; margin-bottom: 1rem !important; }
    .mission-card h3 { font-size: 1.2rem !important; margin-bottom: 0.75rem !important; }
    .mission-card p { font-size: 0.9rem !important; }

    /* 基建区域 */
    .infrastructure-section { padding: 3rem 1rem !important; }

    /* 使命区域 */
    .mission-section { padding: 3rem 1rem !important; }

    /* 页脚 - 移动端单列 */
    .footer { padding: 2.5rem 1rem 1.5rem !important; }
    .footer-grid { grid-template-columns: 1fr !important; gap: 1.5rem !important; margin-bottom: 2rem !important; }
    .footer-brand { max-width: 100% !important; }
    .footer-brand .brand-logo { width: 40px !important; height: 40px !important; margin-bottom: 0.75rem !important; }
    .footer-brand p { font-size: 0.9rem !important; }
    .footer-column h4 { font-size: 1rem !important; margin-bottom: 1rem !important; }
    .footer-column li { margin-bottom: 0.5rem !important; }
    .footer-column a { font-size: 0.9rem !important; }

    .footer-bottom {
        flex-direction: column !important;
        gap: 1rem !important;
        text-align: center !important;
        padding-top: 1.5rem !important;
    }

    .footer-bottom p { font-size: 0.8rem !important; }
    .social-links { justify-content: center !important; }

    /* 返回顶部按钮 - 移动端缩小 */
    .back-to-top {
        bottom: 16px !important;
        right: 16px !important;
        width: 40px !important;
        height: 40px !important;
        font-size: 1rem !important;
    }
}

/* 平板端优化（769px - 992px） */
@media (min-width: 769px) and (max-width: 992px) {
    html { font-size: 15px; }

    /* Hero */
    .hero { padding: 5.5rem 1.5rem 3rem !important; }
    .hero-title { font-size: 2.5rem !important; }
    .hero-stats { grid-template-columns: repeat(2, 1fr) !important; gap: 1.25rem !important; }

    /* 解决方案 - 2列 */
    .solutions-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 1.5rem !important; }

    /* 优势 - 单列 */
    .advantages-grid { grid-template-columns: 1fr !important; gap: 2rem !important; }
    .advantages-content .section-header { text-align: center !important; }
    .advantages-content .section-subtitle { margin: 0 auto !important; }

    /* 优势视觉卡片缩小 */
    .advantage-card { padding: 2rem !important; }
    .advantage-card-icon { font-size: 4rem !important; }

    /* CTA */
    .cta-title { font-size: 1.75rem !important; }

    /* 产品 - 2列 */
    .products-grid { grid-template-columns: repeat(2, 1fr) !important; }

    /* 技术 - 2列 */
    .tech-grid { grid-template-columns: repeat(2, 1fr) !important; }

    /* 页脚 - 2列 */
    .footer-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 2rem !important; }

    /* 联系 - 2列 */
    .contact-grid { grid-template-columns: 1fr !important; gap: 2rem !important; }
}

/* 超小屏幕（480px以下） - 进一步压缩 */
@media (max-width: 480px) {
    html { font-size: 13px; }

    .hero-title { font-size: 1.5rem !important; }
    .hero-description { font-size: 0.85rem !important; }

    .hero-stats { gap: 0.75rem !important; }
    .stat-value { font-size: 1.35rem !important; }
    .stat-label { font-size: 0.7rem !important; }

    .section-title { font-size: 1.35rem !important; }

    .solution-card, .product-card, .tech-card, .contact-form, .contact-info-card {
        padding: 1.25rem !important;
    }

    .cta-title { font-size: 1.2rem !important; }
    .cta-btn { max-width: 260px !important; }

    .advantage-card { padding: 1.5rem !important; }
    .advantage-card-icon { font-size: 3rem !important; }
}

/* Hero 区域（平板端） */
@media (max-width: 992px) {
    .hero-container {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
        max-width: 100% !important;
    }

    .hero-description { margin: 0 auto 2rem !important; }
    .hero-buttons { justify-content: center !important; }
    .hero-badge { justify-content: center !important; }

    /* 页脚 2列（平板） */
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ==========================================
   产品规格表格
   ========================================== */
.products-section {
    padding: 6rem 2rem;
    background: var(--dark-light);
}

.products-container {
    max-width: 1400px;
    margin: 0 auto;
}

.spec-table-wrapper {
    overflow-x: auto;
    margin-top: 3rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(5, 13, 26, 0.6);
    min-width: 800px;
}

.spec-table thead {
    background: var(--gradient);
}

.spec-table th {
    padding: 1.2rem 1.5rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--white);
    white-space: nowrap;
}

.spec-table tbody tr {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.spec-table tbody tr:hover {
    background: rgba(0, 102, 255, 0.08);
}

.spec-table td {
    padding: 1rem 1.5rem;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.spec-table tbody tr td:first-child {
    font-weight: 600;
    color: var(--white);
}

/* 产品卡片网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.product-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 2.5rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.product-card:hover::before {
    opacity: 1;
}

.product-card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 102, 255, 0.3);
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.2);
}

.product-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.2), rgba(0, 212, 170, 0.2));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.product-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.product-card p {
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.product-features {
    list-style: none;
    margin-bottom: 1.5rem;
}

.product-features li {
    padding: 0.5rem 0;
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.product-features li::before {
    content: '✓';
    color: var(--secondary);
    font-weight: bold;
}

/* ==========================================
   联系表单
   ========================================== */
.contact-section {
    padding: 6rem 2rem;
    background: var(--dark);
}

.contact-container {
    max-width: 1400px;
    margin: 0 auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    margin-top: 3rem;
}

.contact-info-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 2.5rem;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-info-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
    color: var(--white);
}

.contact-info-text h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 0.25rem;
}

.contact-info-text p {
    color: var(--gray);
    font-size: 0.95rem;
}

.contact-form {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 3rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--white);
    font-size: 0.95rem;
}

.form-control {
    width: 100%;
    padding: 1rem 1.2rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    font-size: 1rem;
    color: var(--white);
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.2);
    background: rgba(255, 255, 255, 0.08);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* ==========================================
   技术优势页面特定样式
   ========================================== */
.tech-section {
    padding: 6rem 2rem;
    background: var(--dark-light);
}

.tech-container {
    max-width: 1400px;
    margin: 0 auto;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.tech-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 2.5rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.tech-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.15);
    border-color: rgba(0, 102, 255, 0.3);
}

.tech-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 25px rgba(0, 102, 255, 0.3);
    color: var(--white);
}

.tech-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.tech-card p {
    color: var(--gray);
    line-height: 1.8;
}

/* ==========================================
   卫星定制页面特定样式
   ========================================== */
.customization-section {
    padding: 6rem 2rem;
    background: var(--dark);
}

.customization-container {
    max-width: 1400px;
    margin: 0 auto;
}

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

.process-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.process-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 102, 255, 0.3);
}

.process-number {
    width: 50px;
    height: 50px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    margin: 0 auto 1.5rem;
}

.process-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.process-card p {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ==========================================
   太空基建页面特定样式
   ========================================== */
.infrastructure-section {
    padding: 6rem 2rem;
    background: var(--dark-light);
}

.infrastructure-container {
    max-width: 1400px;
    margin: 0 auto;
}

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

.service-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 2.5rem;
    transition: all 0.4s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.15);
    border-color: rgba(0, 102, 255, 0.3);
}

.service-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--white);
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--gray);
    line-height: 1.8;
}

/* ==========================================
   使命页面特定样式
   ========================================== */
.mission-section {
    padding: 6rem 2rem;
    background: var(--dark);
}

.mission-container {
    max-width: 1400px;
    margin: 0 auto;
}

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

.mission-card {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, rgba(0, 212, 170, 0.05) 100%);
    border: 1px solid rgba(0, 102, 255, 0.2);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    transition: all 0.4s ease;
}

.mission-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.2);
}

.mission-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    display: block;
}

.mission-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 1rem;
}

.mission-card p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}