/* ========================================
   Truzo 官网全局样式 - 专业低对比配色版
   深色背景: #121826 (深冷色调)
   主内容背景: #F3F4F6 (柔和暖浅灰)
   品牌色: #3B82F6 (天蓝色)
   ======================================== */

/* CSS变量定义 */
:root {
    --primary-color: #3B82F6;
    --primary-dark: #2563EB;
    --primary-light: #60A5FA;
    --white: #FFFFFF;
    --bg-dark: #121826;
    --bg-light: #F3F4F6;
    --bg-card: #E5E7EB;
    --text-primary: #1F2937;
    --text-heading: #111827;
    --text-secondary: #4B5563;
    --text-muted: #9CA3AF;
    --text-light: #F9FAFB;
    --border-color: #D1D5DB;
    --border-light: #E5E7EB;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 24px rgba(59, 130, 246, 0.2);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --header-height: 80px;
    --container-width: 1200px;
}

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

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

body {
    font-family: "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: var(--bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
    list-style: none;
}

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

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

button {
    cursor: pointer;
}

/* ========================================
   科技感渐变文字
   ======================================== */
.gradient-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-light {
    background: linear-gradient(135deg, var(--white) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   玻璃拟态效果
   ======================================== */
.glass-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
}

.glass-card-light {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(22, 93, 255, 0.1);
    border-radius: var(--border-radius-lg);
}

/* ========================================
   科技感发光边框
   ======================================== */
.glow-border {
    position: relative;
}

.glow-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: inherit;
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.glow-border:hover::before {
    opacity: 1;
}

.glow-border:hover {
    box-shadow: 0 0 20px rgba(0, 198, 255, 0.4);
}

/* ========================================
   通用布局类
   ======================================== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.section-dark {
    background: var(--bg-dark);
    color: var(--text-light);
}

.section-gradient {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-dark-soft) 100%);
    color: var(--text-light);
}

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

.section-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 50px;
}

.section-dark .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   粒子背景动画
   ======================================== */
.particles-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary-light);
    border-radius: 50%;
    opacity: 0.3;
    animation: particleFloat 15s infinite ease-in-out;
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-100px) translateX(50px);
        opacity: 0.6;
    }
}

/* 电路纹理背景 */
.circuit-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(22, 93, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(22, 93, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

/* ========================================
   头部导航栏 - 科技感升级
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: transparent;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(18, 24, 38, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
}

.header.scrolled .logo {
    background: linear-gradient(135deg, var(--white) 0%, var(--primary-highlight) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header.scrolled .logo::after {
    background: linear-gradient(90deg, var(--primary-light), var(--primary-highlight));
}

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

.nav-link {
    font-size: 16px;
    color: var(--text-primary);
    position: relative;
    padding: 8px 0;
    transition: color var(--transition-fast);
}

.header.scrolled .nav-link {
    color: var(--white);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transition: width var(--transition-fast);
    box-shadow: 0 0 10px var(--primary-light);
}

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

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

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

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

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--primary-color);
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.2);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.nav-cta svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* 导航下拉菜单 */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 200px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 1000;
    border: 1px solid var(--border-color);
    margin-top: 8px;
}

.header.scrolled .nav-dropdown-menu {
    background: rgba(18, 24, 38, 0.95);
    border-color: rgba(255, 255, 255, 0.1);
}

.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    margin-top: 0;
}

.nav-dropdown-link {
    display: block;
    padding: 12px 20px;
    font-size: 14px;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.header.scrolled .nav-dropdown-link {
    color: rgba(255, 255, 255, 0.8);
}

.nav-dropdown-link:hover {
    background: rgba(22, 93, 255, 0.1);
    color: var(--primary-color);
}

.header.scrolled .nav-dropdown-link:hover {
    background: rgba(22, 93, 255, 0.2);
    color: var(--primary-light);
}

.nav-dropdown-link.active {
    color: var(--primary-color);
    background: rgba(22, 93, 255, 0.1);
}

.header.scrolled .nav-dropdown-link.active {
    color: var(--primary-light);
}

/* 汉堡菜单按钮 - 科技感升级 */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transition: all var(--transition-fast);
    border-radius: 2px;
}

.header.scrolled .hamburger span {
    background: linear-gradient(90deg, var(--white), var(--primary-highlight));
}

.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(5px, -5px);
}

/* ========================================
   Hero区域 - 科技感升级
   ======================================== */
.hero {
    min-height: calc(100vh - var(--header-height));
    margin-top: var(--header-height);
    background: var(--bg-dark);
    position: relative;
    overflow: hidden;
}

.hero .particles-bg {
    z-index: 1;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: calc(100vh - var(--header-height));
    padding: 60px 20px;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 0 0 55%;
    max-width: 600px;
}

.hero-title {
    font-size: 42px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--white) 0%, var(--primary-highlight) 50%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.3;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.hero-product-buttons {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    flex-wrap: wrap;
}

.hero-product-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.hero-product-btn:hover {
    background: rgba(22, 93, 255, 0.3);
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 198, 255, 0.3);
}

.hero-product-btn svg {
    width: 18px;
    height: 18px;
    fill: var(--primary-light);
}

.hero-product-btn span {
    white-space: nowrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
    background: var(--primary-dark);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--primary-light);
}

.btn-outline:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 198, 255, 0.4);
}

.hero-visual {
    flex: 0 0 40%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-illustration {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.hero-illustration::before {
    content: '';
    position: absolute;
    inset: 20px;
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    animation: borderRotate 20s linear infinite;
}

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

.hero-illustration-content {
    text-align: center;
    color: var(--white);
    padding: 40px;
}

.hero-illustration-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 40px rgba(0, 198, 255, 0.4);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 10px 40px rgba(0, 198, 255, 0.4);
    }
    50% {
        box-shadow: 0 10px 60px rgba(0, 198, 255, 0.6);
    }
}

.hero-illustration-icon svg {
    width: 50px;
    height: 50px;
    fill: var(--white);
}

.hero-illustration-text {
    font-size: 18px;
    font-weight: 500;
    opacity: 0.9;
}

/* ========================================
   产品卡片 - 科技感升级
   ======================================== */
.product-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 2;
}

.product-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-light);
    box-shadow: 0 20px 40px rgba(0, 198, 255, 0.2);
}

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

.product-card-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.2), rgba(0, 198, 255, 0.1));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(22, 93, 255, 0.3);
}

.product-card-icon svg {
    width: 28px;
    height: 28px;
    fill: var(--primary-light);
}

.product-card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.product-card-highlight {
    font-size: 14px;
    color: var(--primary-highlight);
    font-weight: 500;
    margin-bottom: 16px;
}

.product-card-content {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 20px;
}

.product-card-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.product-link {
    font-size: 14px;
    color: var(--primary-light);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-fast);
}

.product-link:hover {
    color: var(--white);
    transform: translateX(4px);
}

.product-link svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
}

/* ========================================
   价值卡片
   ======================================== */
.value-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.value-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

.value-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
    transform: translateY(-4px);
}

.value-card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.value-card-title-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.value-card-title-icon svg {
    width: 20px;
    height: 20px;
    fill: var(--white);
}

.value-card-content {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.value-card-list {
    font-size: 14px;
    color: var(--text-secondary);
}

.value-card-list li {
    padding: 8px 0;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.value-card-list li::before {
    content: '✓';
    color: var(--primary-color);
    font-weight: bold;
    flex-shrink: 0;
}

.value-card-list li strong {
    color: var(--primary-color);
}

/* ========================================
   场景卡片
   ======================================== */
.scene-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 2;
}

.scene-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    text-align: center;
    transition: all var(--transition-normal);
}

.scene-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-light);
    box-shadow: 0 15px 35px rgba(0, 198, 255, 0.2);
}

.scene-card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.3), rgba(0, 198, 255, 0.2));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(0, 198, 255, 0.3);
}

.scene-card-icon svg {
    width: 28px;
    height: 28px;
    fill: var(--primary-light);
}

.scene-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}

.scene-card-content {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

/* ========================================
   用户案例卡片
   ======================================== */
.case-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.case-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
    transform: translateY(-4px);
}

.case-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.case-card-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--white);
    font-weight: 600;
}

.case-card-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.case-card-tag {
    font-size: 12px;
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
    padding: 4px 10px;
    border-radius: 12px;
}

.case-card-harvest {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.case-card-harvest strong {
    color: var(--primary-color);
}

.case-card-scene {
    font-size: 13px;
    color: var(--text-muted);
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

/* ========================================
   认证工程师区域
   ======================================== */
.engineer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.engineer-section {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-light);
}

.engineer-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.engineer-content {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.engineer-info {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.engineer-info-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.engineer-info-item:last-child {
    border-bottom: none;
}

.engineer-info-item strong {
    color: var(--text-primary);
}

.engineer-info-item .highlight {
    color: var(--primary-color);
    font-weight: 600;
}

/* FAQ样式 */
.faq-section {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-light);
}

.faq-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.faq-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.faq-answer {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   页脚 - 科技感升级
   ======================================== */
.footer {
    background: var(--bg-dark);
    color: var(--white);
    padding: 50px 0 30px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(22, 93, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(22, 93, 255, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    pointer-events: none;
}

.footer-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.footer-logo {
    font-size: 24px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--white) 0%, var(--primary-highlight) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}

.footer-nav {
    display: flex;
    gap: 32px;
}

.footer-nav a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

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

.footer-download {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--primary-light);
    transition: all var(--transition-fast);
}

.footer-download:hover {
    color: var(--white);
}

.footer-download svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

.footer-icp {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom {
    text-align: center;
    position: relative;
    z-index: 1;
}

.footer-contact {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 12px;
}

.footer-copyright {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
}

/* ========================================
   子页面Hero区域
   ======================================== */
.page-hero {
    padding: 120px 0 80px;
    margin-top: var(--header-height);
    text-align: center;
    position: relative;
    background: var(--bg-dark);
}

.page-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(180deg, transparent 0%, var(--bg-light) 100%);
    pointer-events: none;
}

.page-hero-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.page-hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    position: relative;
    z-index: 1;
}

.page-content {
    background: var(--bg-light);
    position: relative;
}

.page-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(180deg, var(--bg-light) 0%, transparent 100%);
    pointer-events: none;
    z-index: 0;
}

/* 场景页面交替背景 */
.scene-alt-bg {
    background: var(--bg-light);
    position: relative;
}

.scene-alt-bg .scene-detail-card-dark {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(22, 93, 255, 0.1);
}

.scene-alt-bg .scene-detail-title {
    color: var(--text-primary);
}

.scene-alt-bg .scene-detail-tagline {
    color: var(--primary-color);
}

.scene-alt-bg .scene-intro h3,
.scene-alt-bg .scene-features h3,
.scene-alt-bg .scene-cases h3 {
    color: var(--text-primary);
}

.scene-alt-bg .scene-intro h3::before,
.scene-alt-bg .scene-features h3::before,
.scene-alt-bg .scene-cases h3::before {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
}

.scene-alt-bg .scene-intro p {
    color: var(--text-secondary);
}

.scene-alt-bg .scene-feature-item {
    background: var(--bg-light);
}

.scene-alt-bg .scene-feature-item h4 {
    color: var(--text-primary);
}

.scene-alt-bg .scene-feature-item p {
    color: var(--text-secondary);
}

.scene-alt-bg .scene-case-item {
    background: var(--bg-light);
}

.scene-alt-bg .scene-case-item p {
    color: var(--text-secondary);
}

.scene-alt-bg .scene-actions {
    border-top-color: var(--border-color);
}

/* ========================================
   产品详情页样式
   ======================================== */
.product-detail-section {
    padding: 60px 0;
    position: relative;
}

.product-detail-section:first-child {
    padding-top: 0;
}

.product-detail-header {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.section-dark .product-detail-header {
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

.product-detail-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 10px 30px rgba(22, 93, 255, 0.3);
}

.product-detail-icon svg {
    width: 40px;
    height: 40px;
    fill: var(--white);
}

.product-detail-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.section-dark .product-detail-title {
    color: var(--white);
}

.product-detail-tagline {
    font-size: 18px;
    color: var(--primary-color);
    font-weight: 500;
}

.section-dark .product-detail-tagline {
    color: var(--primary-light);
}

.product-detail-content {
    position: relative;
    z-index: 1;
}

.product-intro {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-light);
}

.section-dark .product-intro {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.product-intro-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-dark .product-intro-title {
    color: var(--white);
}

.product-intro-title::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
}

.product-intro-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 16px;
}

.section-dark .product-intro-text {
    color: rgba(255, 255, 255, 0.8);
}

.product-intro-text:last-child {
    margin-bottom: 0;
}

/* 核心卖点网格 */
.product-highlights {
    margin-bottom: 40px;
}

.highlight-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.highlight-item {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.highlight-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
    transform: translateY(-4px);
}

.section-dark .highlight-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.section-dark .highlight-item:hover {
    border-color: var(--primary-light);
    box-shadow: 0 15px 35px rgba(0, 198, 255, 0.2);
}

.highlight-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.1), rgba(0, 198, 255, 0.05));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(22, 93, 255, 0.2);
}

.section-dark .highlight-icon {
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.2), rgba(0, 198, 255, 0.1));
    border-color: rgba(0, 198, 255, 0.3);
}

.highlight-icon svg {
    width: 28px;
    height: 28px;
    fill: var(--primary-color);
}

.section-dark .highlight-icon svg {
    fill: var(--primary-light);
}

.highlight-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.section-dark .highlight-title {
    color: var(--white);
}

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

.section-dark .highlight-text {
    color: rgba(255, 255, 255, 0.7);
}

/* 定价网格 */
.product-pricing {
    margin-bottom: 40px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.pricing-item {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    text-align: center;
    position: relative;
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.pricing-item.featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.section-dark .pricing-item {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
}

.section-dark .pricing-item:hover,
.section-dark .pricing-item.featured {
    border-color: var(--primary-light);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 16px;
    border-radius: 12px;
}

.pricing-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.section-dark .pricing-name {
    color: var(--white);
}

.pricing-price {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.section-dark .pricing-price {
    color: var(--primary-light);
}

.pricing-features {
    text-align: left;
}

.pricing-features li {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-dark .pricing-features li {
    color: rgba(255, 255, 255, 0.8);
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li::before {
    content: '✓';
    color: var(--primary-color);
    font-weight: bold;
    flex-shrink: 0;
}

/* 任务流程 */
.product-flow {
    margin-bottom: 40px;
}

.flow-steps {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.flow-step {
    flex: 1;
    min-width: 150px;
    text-align: center;
}

.flow-step-num {
    width: 40px;
    height: 40px;
    margin: 0 auto 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(22, 93, 255, 0.3);
}

.flow-step-content h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.section-dark .flow-step-content h4 {
    color: var(--white);
}

.flow-step-content p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.section-dark .flow-step-content p {
    color: rgba(255, 255, 255, 0.7);
}

.flow-step-arrow {
    font-size: 24px;
    color: var(--primary-color);
    align-self: center;
    flex-shrink: 0;
}

.section-dark .flow-step-arrow {
    color: var(--primary-light);
}

/* 收益网格 */
.product-earnings {
    margin-bottom: 40px;
}

.earnings-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.earnings-item {
    text-align: center;
    padding: 24px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
}

.section-dark .earnings-item {
    background: rgba(255, 255, 255, 0.05);
}

.earnings-item:hover {
    background: rgba(22, 93, 255, 0.05);
}

.earnings-type {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.section-dark .earnings-type {
    color: var(--white);
}

.earnings-range {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.section-dark .earnings-range {
    color: var(--primary-light);
}

.earnings-desc {
    font-size: 13px;
    color: var(--text-secondary);
}

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

/* 经验分级 */
.experience-levels {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.experience-level {
    flex: 1;
    min-width: 140px;
    text-align: center;
    padding: 20px 16px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
}

.section-dark .experience-level {
    background: rgba(255, 255, 255, 0.05);
}

.experience-level:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.level-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 12px;
    margin-bottom: 12px;
}

.level-badge.free {
    background: rgba(153, 153, 153, 0.2);
    color: #666;
}

.level-badge.standard {
    background: rgba(22, 93, 255, 0.2);
    color: var(--primary-color);
}

.level-badge.pro {
    background: rgba(0, 198, 255, 0.2);
    color: var(--primary-light);
}

.level-badge.expert {
    background: rgba(255, 152, 0, 0.2);
    color: #FF9800;
}

.level-badge.private {
    background: rgba(156, 39, 176, 0.2);
    color: #9C27B0;
}

.section-dark .level-badge.free {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

.level-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.section-dark .level-price {
    color: var(--white);
}

.level-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

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

.pricing-note {
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.section-dark .pricing-note {
    color: rgba(255, 255, 255, 0.7);
    border-top-color: rgba(255, 255, 255, 0.1);
}

/* 支持平台 */
.product-platforms {
    margin-bottom: 40px;
}

.platform-grid {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.platform-item {
    text-align: center;
}

.platform-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 12px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.platform-icon:hover {
    transform: scale(1.1);
}

.platform-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--white);
}

.platform-icon.wechat {
    background: linear-gradient(135deg, #07C160, #09BB07);
}

.platform-icon.qq {
    background: linear-gradient(135deg, #12B7F5, #00A0E9);
}

.platform-icon.wework {
    background: linear-gradient(135deg, #2B7EFF, #1E5FD9);
}

.platform-icon.feishu {
    background: linear-gradient(135deg, #3370FF, #0066FF);
}

.platform-icon.dingtalk {
    background: linear-gradient(135deg, #0089FF, #0066CC);
}

.platform-item span {
    font-size: 14px;
    color: var(--text-secondary);
}

.section-dark .platform-item span {
    color: rgba(255, 255, 255, 0.8);
}

/* 产品操作按钮 */
.product-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.product-actions .btn svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    margin-right: 8px;
}

/* ========================================
   面包屑导航
   ======================================== */
.breadcrumb {
    padding: 20px 0;
    background: var(--bg-dark);
    margin-top: var(--header-height);
}

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

.breadcrumb-list a {
    color: rgba(255, 255, 255, 0.7);
}

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

.breadcrumb-separator {
    color: rgba(255, 255, 255, 0.3);
}

.breadcrumb-current {
    color: var(--primary-light);
}

/* ========================================
   子页面内容区
   ======================================== */
.page-content {
    padding: 60px 0;
    background: var(--bg-light);
}

.page-content-dark {
    background: var(--bg-dark);
    color: var(--text-light);
}

.page-section {
    margin-bottom: 60px;
}

.page-section:last-child {
    margin-bottom: 0;
}

.page-section-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
    padding-left: 16px;
    border-left: 4px solid var(--primary-color);
}

.page-content-dark .page-section-title {
    color: var(--white);
    border-left-color: var(--primary-light);
}

/* 表格样式 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-light);
}

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

.data-table th {
    background-color: var(--bg-light);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.data-table td {
    font-size: 15px;
    color: var(--text-secondary);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr:hover {
    background-color: rgba(22, 93, 255, 0.02);
}

/* 流程图样式 */
.flow-chart {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 40px;
    background: var(--bg-light);
    border-radius: var(--border-radius-lg);
    flex-wrap: wrap;
}

.flow-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px;
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    min-width: 140px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

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

.flow-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flow-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--white);
}

.flow-text {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.flow-arrow {
    font-size: 24px;
    color: var(--primary-color);
}

/* 联系信息 */
.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

.contact-info-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-info-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--white);
}

.contact-info-content h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.contact-info-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 表单样式 */
.contact-form {
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-light);
}

.form-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-label .required {
    color: #E53935;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    color: var(--text-primary);
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

.form-hint {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 8px;
}

.form-submit {
    width: 100%;
    height: 48px;
    margin-top: 8px;
}

/* 图表容器 */
.chart-container {
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-light);
    margin-bottom: 30px;
}

.chart-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.chart-canvas {
    width: 100%;
    height: 300px;
}

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

/* 平板设备 (768px - 1024px) */
@media (max-width: 1024px) {
    .container {
        padding: 0 24px;
    }

    .section {
        padding: 60px 0;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-visual {
        flex: 0 0 35%;
    }

    .hero-illustration {
        max-width: 350px;
    }

    .product-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .scene-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .value-cards {
        gap: 24px;
    }

    .case-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .engineer-grid {
        gap: 30px;
    }
}

/* 移动设备 (< 768px) */
@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .section {
        padding: 50px 0;
    }

    .section-title {
        font-size: 24px;
    }

    .section-subtitle {
        font-size: 14px;
        margin-bottom: 36px;
    }

    /* 导航栏移动端 */
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 30px 20px;
        gap: 0;
        transform: translateX(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        z-index: 999;
    }

    .nav-menu.active {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        display: block;
        padding: 16px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        width: 100%;
        color: var(--white);
        font-size: 16px;
    }

    .nav-link::after {
        display: none;
    }

    .nav-dropdown {
        width: 100%;
    }

    .nav-dropdown .nav-link {
        width: 100%;
    }

    .nav-dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        margin-top: 0;
        background: rgba(255, 255, 255, 0.05);
        border: none;
        border-radius: 0;
        box-shadow: none;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal);
    }

    .nav-dropdown.active .nav-dropdown-menu {
        max-height: 300px;
    }

    .nav-dropdown-link {
        padding: 12px 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        color: rgba(255, 255, 255, 0.7);
    }

    .nav-dropdown-link:hover,
    .nav-dropdown-link.active {
        background: rgba(59, 130, 246, 0.15);
        color: var(--primary-light);
    }

    .nav-cta {
        margin-top: 20px;
        justify-content: center;
    }

    .hamburger {
        display: flex;
    }

    /* Hero区域移动端 */
    .hero .container {
        flex-direction: column;
        text-align: center;
        padding: 40px 20px;
    }

    .hero-content {
        flex: none;
        max-width: 100%;
        margin-bottom: 40px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }

    .hero-visual {
        flex: none;
        width: 100%;
    }

    .hero-illustration {
        max-width: 280px;
    }

    /* 卡片网格移动端 */
    .product-cards,
    .scene-cards,
    .value-cards,
    .case-cards {
        grid-template-columns: 1fr;
    }

    .product-card,
    .scene-card,
    .value-card,
    .case-card {
        padding: 24px;
    }

    .engineer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    /* 页脚移动端 */
    .footer-main {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .footer-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }

    /* 流程图移动端 */
    .flow-chart {
        flex-direction: column;
        padding: 24px;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    /* 联系信息移动端 */
    .contact-info {
        grid-template-columns: 1fr;
    }

    /* 表格移动端 */
    .data-table {
        display: block;
        overflow-x: auto;
    }
}

/* 小屏幕手机 (< 480px) */
@media (max-width: 480px) {
    .hero-title {
        font-size: 24px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .product-card-links {
        flex-direction: column;
    }
}

/* ========================================
   动画效果
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* 滚动显示动画 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* 光效扫描动画 */
@keyframes scanLine {
    0% {
        transform: translateY(-100%);
    }
    100% {
        transform: translateY(100%);
    }
}

.scan-effect::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
    animation: scanLine 3s linear infinite;
    opacity: 0.5;
}

/* ========================================
   认证工程师页面样式
   ======================================== */
.engineer-intro-section {
    padding: 60px 0;
}

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

.engineer-intro-content .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.engineer-intro-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 30px;
}

.engineer-benefits {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

.benefit-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

.benefit-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

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

.benefit-content h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.benefit-content p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.engineer-intro-visual {
    display: flex;
    justify-content: center;
}

.engineer-visual-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-medium);
    max-width: 400px;
    width: 100%;
}

.engineer-visual-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.engineer-visual-icon svg {
    width: 40px;
    height: 40px;
    fill: var(--white);
}

.engineer-visual-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.income-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
}

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

.income-value {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.income-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.engineer-visual-note {
    font-size: 14px;
    color: var(--text-muted);
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

/* 培训模块 */
.training-section {
    padding: 80px 0;
    position: relative;
    background: var(--bg-light);
}

.training-modules {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.training-module {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-light);
}

.training-module:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
}

.module-number {
    font-size: 48px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    margin-bottom: 12px;
}

.module-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.module-list {
    font-size: 13px;
    color: var(--text-secondary);
}

.module-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.module-list li:last-child {
    border-bottom: none;
}

.module-list li::before {
    content: '•';
    color: var(--primary-color);
    flex-shrink: 0;
}

/* 认证流程 */
.certification-section {
    padding: 80px 0;
}

.certification-steps {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.cert-step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: 30px 20px;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-light);
    position: relative;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

.cert-step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.cert-step-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(59, 130, 246, 0.2);
}

.cert-step-icon svg {
    width: 28px;
    height: 28px;
    fill: var(--primary-color);
}

.cert-step-num {
    position: absolute;
    top: -12px;
    right: -12px;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.cert-step h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.cert-step p {
    font-size: 14px;
    color: var(--text-secondary);
}

.cert-step-arrow {
    font-size: 24px;
    color: var(--primary-color);
    align-self: center;
    flex-shrink: 0;
}

/* 定价区域 */
.pricing-section {
    padding: 80px 0;
    position: relative;
    background: var(--bg-light);
}

.pricing-card-wrapper {
    display: flex;
    justify-content: center;
}

.pricing-main-card {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    max-width: 500px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-medium);
}

.pricing-main-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.pricing-main-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: 30px;
}

.price-currency {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

.price-value {
    font-size: 56px;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
}

.price-unit {
    font-size: 18px;
    color: var(--text-secondary);
    margin-left: 4px;
}

.pricing-main-features {
    text-align: left;
    margin-bottom: 30px;
}

.pricing-main-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 15px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.pricing-main-features li:last-child {
    border-bottom: none;
}

.pricing-main-features li svg {
    width: 20px;
    height: 20px;
    fill: var(--primary-color);
    flex-shrink: 0;
}

.btn-large {
    padding: 16px 48px;
    font-size: 18px;
}

/* FAQ卡片网格 */
.faq-section-page {
    padding: 80px 0;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.faq-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

.faq-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
    transform: translateY(-4px);
}

.faq-card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.faq-card-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--primary-color);
}

.faq-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

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

/* ========================================
   使用场景页面样式
   ======================================== */
.scene-detail-section {
    padding: 0;
    margin-bottom: 60px;
}

.scene-detail-section:last-child {
    margin-bottom: 0;
}

.scene-detail-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-light);
}

.scene-detail-card-dark {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    position: relative;
    z-index: 1;
}

.scene-detail-header {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 30px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.scene-detail-card-dark .scene-detail-header {
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

.scene-detail-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.scene-detail-icon svg {
    width: 40px;
    height: 40px;
    fill: var(--white);
}

.scene-detail-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.scene-detail-card-dark .scene-detail-title {
    color: var(--white);
}

.scene-detail-tagline {
    font-size: 16px;
    color: var(--primary-color);
    font-weight: 500;
}

.scene-detail-card-dark .scene-detail-tagline {
    color: var(--primary-light);
}

.scene-intro {
    margin-bottom: 30px;
}

.scene-intro h3,
.scene-features h3,
.scene-cases h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.scene-detail-card-dark .scene-intro h3,
.scene-detail-card-dark .scene-features h3,
.scene-detail-card-dark .scene-cases h3 {
    color: var(--white);
}

.scene-intro h3::before,
.scene-features h3::before,
.scene-cases h3::before {
    content: '';
    width: 4px;
    height: 18px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
}

.scene-intro p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
}

.scene-detail-card-dark .scene-intro p {
    color: rgba(255, 255, 255, 0.8);
}

.scene-feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.scene-feature-item {
    text-align: center;
    padding: 24px 16px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
}

.scene-feature-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.scene-detail-card-dark .scene-feature-item {
    background: rgba(255, 255, 255, 0.05);
}

.scene-feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 12px;
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.1), rgba(0, 198, 255, 0.05));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(22, 93, 255, 0.2);
}

.scene-detail-card-dark .scene-feature-icon {
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.2), rgba(0, 198, 255, 0.1));
    border-color: rgba(0, 198, 255, 0.3);
}

.scene-feature-icon svg {
    width: 28px;
    height: 28px;
    fill: var(--primary-color);
}

.scene-detail-card-dark .scene-feature-icon svg {
    fill: var(--primary-light);
}

.scene-feature-item h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.scene-detail-card-dark .scene-feature-item h4 {
    color: var(--white);
}

.scene-feature-item p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.scene-detail-card-dark .scene-feature-item p {
    color: rgba(255, 255, 255, 0.7);
}

.scene-cases {
    margin-top: 30px;
}

.scene-case-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.scene-case-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
}

.scene-detail-card-dark .scene-case-item {
    background: rgba(255, 255, 255, 0.05);
}

.case-tag {
    flex-shrink: 0;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    font-size: 12px;
    font-weight: 600;
    border-radius: 12px;
}

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

.scene-detail-card-dark .scene-case-item p {
    color: rgba(255, 255, 255, 0.8);
}

.scene-actions {
    display: flex;
    gap: 16px;
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.scene-detail-card-dark .scene-actions {
    border-top-color: rgba(255, 255, 255, 0.1);
}

/* CTA区域 */
.cta-section {
    padding: 80px 0;
    text-align: center;
    position: relative;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* ========================================
   联系我们页面样式
   ======================================== */
.contact-section {
    padding: 60px 0;
}

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

.contact-info-area .section-title {
    text-align: left;
    margin-bottom: 16px;
}

.contact-intro {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
}

.contact-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 30px;
}

.contact-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

.contact-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
    transform: translateX(4px);
}

.contact-card-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-card-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--white);
}

.contact-card-content h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.contact-card-content p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.contact-hint {
    font-size: 12px;
    color: var(--text-muted);
}

.recruit-section {
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.1);
    border-radius: var(--border-radius-lg);
    padding: 24px;
}

.recruit-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.recruit-title svg {
    width: 24px;
    height: 24px;
    fill: var(--primary-color);
}

.recruit-content {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.contact-form-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-medium);
    border: 1px solid var(--border-light);
}

.contact-form-card .form-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

/* FAQ联系区域 */
.faq-contact-section {
    padding: 80px 0;
    position: relative;
}

.faq-contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.faq-contact-item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 24px;
    transition: all var(--transition-normal);
}

.faq-contact-item:hover {
    border-color: var(--primary-light);
    transform: translateY(-4px);
}

.faq-contact-q {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: 12px;
}

.faq-contact-a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

/* 地图区域 */
.map-section {
    padding: 60px 0;
}

.map-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-light);
}

.map-placeholder {
    padding: 60px;
    text-align: center;
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.03), rgba(0, 198, 255, 0.02));
}

.map-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(22, 93, 255, 0.3);
}

.map-icon svg {
    width: 40px;
    height: 40px;
    fill: var(--white);
}

.map-address {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.map-hint {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========================================
   产品导航选择页样式
   ======================================== */
.product-nav-section {
    padding: 80px 0;
    text-align: center;
    background: var(--bg-light);
}

.product-nav-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.product-nav-card {
    display: block;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    text-align: left;
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.product-nav-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.product-nav-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
    transform: translateY(-8px);
}

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

.product-nav-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.product-nav-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--white);
}

.product-nav-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.product-nav-highlight {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 16px;
}

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

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

.product-nav-link svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    transition: transform var(--transition-fast);
}

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

/* ========================================
   产品单页样式
   ======================================== */
.product-single-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.product-single-intro {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-light);
}

.product-single-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.product-single-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}

.product-single-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--white);
}

.product-single-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.product-single-content {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
}

.product-single-content p {
    margin-bottom: 16px;
}

.product-single-content p:last-child {
    margin-bottom: 0;
}

.product-single-highlights {
    margin-bottom: 40px;
}

.product-single-highlights .section-title,
.product-single-pricing .section-title,
.product-single-flow .section-title,
.product-single-earnings .section-title,
.product-single-platforms .section-title {
    text-align: center;
    margin-bottom: 30px;
}

.product-single-pricing,
.product-single-flow,
.product-single-earnings,
.product-single-platforms {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-light);
}

.product-single-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.product-single-actions .btn svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
    margin-right: 8px;
}

/* 产品面包屑导航 */
.product-nav-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.product-nav-breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.product-nav-breadcrumb span {
    color: rgba(255, 255, 255, 0.5);
}

.product-nav-breadcrumb .current {
    color: var(--primary-light);
    font-weight: 500;
}

/* ========================================
   打印样式
   ======================================== */
@media print {
    .header,
    .footer,
    .hamburger,
    .particles-bg,
    .circuit-bg {
        display: none;
    }

    .hero {
        margin-top: 0;
        min-height: auto;
        background: var(--white);
        color: var(--text-primary);
    }

    .section {
        padding: 30px 0;
    }
}