/* ==========================================================================
   1. 初始化与设计系统变量 (Reset & Design System)
   ========================================================================== */
:root {
    /* 品牌核心色彩 - 严谨工业与激光光电 */
    --color-bg-main: #0a0f1d;       /* 极客深蓝黑背景 */
    --color-bg-surface: #121a2e;    /* 卡片/次级区块背景 */
    --color-bg-surface-hover: #1a2540;
    --color-primary: #00e5ff;       /* 激光蓝 (主视觉/链接/强调) */
    --color-secondary: #39ff14;     /* 光电绿 (核心CTA/高亮/转化) */
    --color-text-primary: #ffffff;   /* 纯白主标题 */
    --color-text-muted: #a0aec0;     /* 科技灰副文本 */
    --color-text-dark: #4a5568;      /* 暗灰描述 */
    --color-border: #1e293b;         /* 科技感细边框 */
    
    /* 留白与间距规范 */
    --section-padding: 100px 0;
    --section-padding-mobile: 60px 0;
    --container-max-width: 1200px;
    
    /* 缓动动画 */
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
    background-color: var(--color-bg-main);
    color: var(--color-text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
    line-height: 1.6;
}

/* 布局容器 */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

img, svg {
    display: block;
    max-width: 100%;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s var(--transition-smooth);
}

button, input, textarea {
    font-family: inherit;
    border: none;
    outline: none;
    background: none;
}

/* ==========================================================================
   2. 通用组件与高级微动效 (Typography & Global Components)
   ========================================================================== */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.3;
}

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

.section-tag {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
    padding: 4px 12px;
    background: rgba(0, 229, 255, 0.1);
    border: 1px solid rgba(0, 229, 255, 0.2);
    border-radius: 4px;
}

.section-title {
    font-size: 36px;
    color: var(--color-text-primary);
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 16px auto 0;
}

/* 极客发光 CTA 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.4s var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

/* 转化核心按钮：光电绿发光 */
.btn-primary {
    background: var(--color-secondary);
    color: #050a14;
    box-shadow: 0 4px 20px rgba(57, 255, 20, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(57, 255, 20, 0.4);
    background: #46ff24;
}

/* 技术次级按钮：外框发光蓝 */
.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    box-shadow: 0 4px 15px rgba(0, 229, 255, 0.05);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    background: rgba(0, 229, 255, 0.08);
    box-shadow: 0 6px 25px rgba(0, 229, 255, 0.25);
}

/* ==========================================================================
   3. Header 与响应式汉堡菜单 (Navigation & Header)
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 15, 29, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: all 0.3s var(--transition-smooth);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo a {
    display: flex;
    align-items: center;
    font-size: 22px;
    font-weight: 800;
    color: var(--color-text-primary);
    letter-spacing: 0.5px;
}

.logo svg {
    margin-right: 10px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-muted);
    position: relative;
    padding: 8px 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s var(--transition-smooth);
}

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

.header-cta {
    display: flex;
    align-items: center;
}

/* 汉堡按钮 */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    cursor: pointer;
    z-index: 1010;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: all 0.3s var(--transition-smooth);
}

/* ==========================================================================
   4. 网页各大核心区块样式 (Main Section Layouts)
   ========================================================================== */

/* Hero 区块（渐变科技背景） */
.hero-section {
    padding-top: 180px;
    padding-bottom: 120px;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at 80% 20%, rgba(0, 229, 255, 0.08) 0%, rgba(10, 15, 29, 1) 50%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
}

.hero-content h1 {
    font-size: 48px;
    line-height: 1.25;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-content h1 span {
    background: linear-gradient(135deg, var(--color-primary) 0%, #0089ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 18px;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    max-width: 620px;
}

.hero-btns {
    display: flex;
    gap: 16px;
}

/* 动态光栅/激光束 科技装饰元素 */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-canvas-mock {
    width: 100%;
    max-width: 420px;
    height: 420px;
    border: 1px solid rgba(0, 229, 255, 0.15);
    border-radius: 50%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: rotateTech 25s linear infinite;
}

.tech-canvas-mock::before {
    content: '';
    position: absolute;
    width: 80%;
    height: 80%;
    border: 1px dashed rgba(59, 255, 20, 0.2);
    border-radius: 50%;
}

.tech-core {
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 30px var(--color-primary), 0 0 60px var(--color-primary);
}

@keyframes rotateTech {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Pain Points 区块 */
.pain-section {
    padding: var(--section-padding);
    background-color: rgba(18, 26, 46, 0.3);
    border-top: 1px solid var(--color-border);
}

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

.pain-card {
    background: var(--color-bg-surface);
    padding: 40px 32px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: all 0.3s var(--transition-smooth);
}

.pain-card:hover {
    border-color: rgba(239, 68, 68, 0.3); /* 痛点区域弱悬停变红提示 */
    transform: translateY(-4px);
}

.pain-icon {
    width: 48px;
    height: 48px;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.pain-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.pain-card p {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* Solutions 区块 (卡片悬浮微动效) */
.solutions-section {
    padding: var(--section-padding);
}

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

.solution-card {
    background: var(--color-bg-surface);
    padding: 40px 32px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: all 0.3s var(--transition-smooth);
}

.solution-card:hover {
    background: var(--color-bg-surface-hover);
    border-color: var(--color-primary);
    box-shadow: 0 10px 30px rgba(0, 229, 255, 0.08);
    transform: translateY(-5px);
}

.solution-icon {
    width: 56px;
    height: 56px;
    background: rgba(0, 229, 255, 0.1);
    color: var(--color-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
}

.solution-card h3 {
    font-size: 22px;
    margin-bottom: 14px;
}

.solution-card p {
    font-size: 15px;
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

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

.solution-link svg {
    transition: transform 0.3s var(--transition-smooth);
}

.solution-card:hover .solution-link svg {
    transform: translateX(4px);
}

/* Social Proof 区块 */
.proof-section {
    padding: var(--section-padding);
    background: var(--color-bg-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.proof-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
    margin-bottom: 60px;
}

.stat-item .num {
    font-size: 44px;
    font-weight: 800;
    color: var(--color-secondary);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-item .label {
    font-size: 14px;
    color: var(--color-text-muted);
}

.trust-badges {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 60px;
    flex-wrap: wrap;
    opacity: 0.75;
}

.badge-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-muted);
}

/* About Us 区块 */
.about-section {
    padding: var(--section-padding);
}

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

.about-content h2 {
    font-size: 32px;
    margin-bottom: 20px;
}

.about-content p {
    color: var(--color-text-muted);
    margin-bottom: 20px;
    font-size: 15px;
}

.about-features {
    list-style: none;
    margin-top: 30px;
}

.about-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    margin-bottom: 14px;
}

.about-features svg {
    color: var(--color-secondary);
    flex-shrink: 0;
}

.about-map-mock {
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 30px;
}

.map-info-box {
    border-left: 3px solid var(--color-primary);
    padding-left: 20px;
}

.map-info-box h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.map-info-box p {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 6px;
}

/* FAQ 区块 (手风琴布局) */
.faq-section {
    padding: var(--section-padding);
    background-color: rgba(18, 26, 46, 0.3);
    border-top: 1px solid var(--color-border);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    margin-bottom: 16px;
    overflow: hidden;
}

.faq-trigger {
    width: 100%;
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-primary);
    cursor: pointer;
}

.faq-icon-box {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    transition: transform 0.3s ease;
}

.faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s var(--transition-smooth);
    background: rgba(10, 15, 29, 0.4);
}

.faq-content p {
    padding: 0 24px 24px 24px;
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* FAQ 展开状态的样式配合 JS */
.faq-item.active .faq-icon-box {
    transform: rotate(180deg);
}

.faq-item.active .faq-content {
    max-height: 200px; /* 给予足够展开高度 */
}

/* Final CTA 终极呼吁 */
.cta-section {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #121a2e 0%, #0a0f1d 100%);
    position: relative;
    border-top: 1px solid var(--color-border);
}

.cta-box {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 50px;
    background: rgba(25, 36, 64, 0.4);
    border: 1px solid rgba(0, 229, 255, 0.2);
    border-radius: 16px;
    padding: 50px;
}

.cta-info h2 {
    font-size: 32px;
    margin-bottom: 16px;
}

.cta-info p {
    color: var(--color-text-muted);
    font-size: 15px;
    margin-bottom: 24px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
    font-size: 16px;
}

.contact-method svg {
    color: var(--color-primary);
}

.cta-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--color-bg-main);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text-primary);
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--color-primary);
}

/* ==========================================================================
   5. Footer 区块 (工信部与合规合集)
   ========================================================================== */
.footer {
    background: #050811;
    padding: 60px 0 30px;
    border-top: 1px solid var(--color-border);
    font-size: 14px;
    color: var(--color-text-muted);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(2, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    margin-top: 12px;
    line-height: 1.6;
}

.footer-links h4 {
    color: var(--color-text-primary);
    margin-bottom: 18px;
    font-size: 16px;
}

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

.footer-links li {
    margin-bottom: 10px;
}

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

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-legal {
    display: flex;
    gap: 20px;
}

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

/* ==========================================================================
   6. 完美响应式断点媒体查询 (Responsive Media Queries)
   ========================================================================== */

/* 平板端断点 (992px) */
@mixin pad {
    @media (max-width: 992px) { @content; }
}

@media (max-width: 992px) {
    .container { padding: 0 20px; }
    
    .hero-grid, .about-grid, .cta-box {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-content { text-align: center; }
    .hero-content p { margin: 0 auto 40px; }
    .hero-btns { justify-content: center; }
    .hero-visual { order: -1; } /* 移动端先展示高质感光电环 */
    
    .pain-grid, .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .proof-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .trust-badges { gap: 30px; }
}

/* 手机端移动优先断点 (768px) - 激活抽屉式汉堡导航 */
@media (max-width: 768px) {
    .header-container { height: 70px; }
    
    .hamburger { display: flex; }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--color-bg-main);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 60px;
        gap: 40px;
        transform: translateX(100%);
        transition: transform 0.4s cubic-bezier(0.77,0.2,0.05,1);
        border-top: 1px solid var(--color-border);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-link { font-size: 18px; }
    
    .header-cta { display: none; } /* 移动端在导航菜单内或直接隐藏，保持顶栏极其干净 */
    
    /* 汉堡按钮变成 X 动画 */
    .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

    .hero-content h1 { font-size: 32px; }
    .section-title { font-size: 28px; }
    
    .pain-grid, .solutions-grid, .proof-stats, .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-box { padding: 30px 20px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .footer-legal { justify-content: center; }
}