@charset "UTF-8";/* 全局变量 - 明亮风格 */
:root {
    --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --hero-gradient: linear-gradient(to right, #edf4fe 0%, #f7fafd 40%, #f0f8ff 70%, #f8f3ff 100%);
    --card-bg: #ffffff;
    --card-hover: rgba(59, 130, 246, 0.06);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --border-color: #f1f5f9;
    --bg-light: #fafbfc;
    --bg-card: #ffffff;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.04), 0 1px 2px -1px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-logo i {
    font-size: 1.6rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-links a:hover {
    color: #3b82f6;
}

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

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.btn-chat {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.btn-chat:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* 按钮样式 */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    font-size: 1rem;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    background: transparent;
    color: #3b82f6;
    border: 2px solid #3b82f6;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    font-size: 1rem;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: #3b82f6;
    color: white;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    background: transparent;
    color: #3b82f6;
    border: 2px solid #3b82f6;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
    width: 100%;
}

.btn-outline:hover {
    background: #3b82f6;
    color: white;
}

/* Hero区域 */
.hero {
    padding: 70px 20px 80px;
    position: relative;
    overflow: hidden;
    width: 100%;
    background: var(--hero-gradient);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background: var(--hero-gradient);
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -15%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -25%;
    left: -8%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-container {
    max-width: 1200px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    color: var(--text-primary);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(59, 130, 246, 0.1);
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: #3b82f6;
    margin-bottom: 30px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: #1f2937;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-features {
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
}

.feature-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(59, 130, 246, 0.08);
    padding: 10px 18px;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: #3b82f6;
}

.feature-tag i {
    font-size: 0.9rem;
}

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

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

.product-showcase {
    position: relative;
}

.hero-product {
    max-width: 600px;
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transform: perspective(1000px) rotateY(-5deg);
    transition: var(--transition);
}

.hero-product:hover {
    transform: perspective(1000px) rotateY(0deg) scale(1.02);
}

.product-reflection {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%) scaleY(-1);
    width: 80%;
    height: 100px;
    background: linear-gradient(to bottom, rgba(59, 130, 246, 0.1), transparent);
    border-radius: var(--radius-xl);
    filter: blur(10px);
    opacity: 0.5;
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 1440 100' xmlns='http://www.w3.org/2000/svg' preserveAspectRatio='none'%3E%3Cpath fill='%23dbeafe' d='M0,55 C 180,90 360,90 540,55 C 720,20 900,20 1080,55 C 1260,90 1350,75 1440,55 L1440,100 L0,100 Z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-size: 100% 100%;
    background-position: bottom;
}

/* 通用区块标题 */
.section-intro {
    text-align: center;
    margin-bottom: 60px;
}

.section-intro h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-intro p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* 产品系列 */
.products {
    padding: 80px 20px;
    background: #fafbfc;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.product-card {
    background: #ffffff;
    border-radius: var(--radius-xl);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border: 1px solid #f1f5f9;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: #3b82f6;
}

.product-card.featured {
    border: 2px solid #3b82f6;
    background: #ffffff;
}

.product-header {
    margin-bottom: 20px;
}

.product-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-badge.pro {
    background: var(--primary-gradient);
    color: white;
}

.product-header h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.product-image {
    margin-bottom: 24px;
}

.product-image img {
    max-width: 400px;
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.product-desc p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.product-specs {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 30px;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.spec-item i {
    color: #3b82f6;
}

/* ShenzhuoOS展示 */
.shenzhuoos {
    padding: 80px 20px;
    background: #ffffff;
    position: relative;
    overflow: hidden;
}

.shenzhuoos::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.shenzhuoos .section-intro h2 {
    color: var(--text-primary);
}

.shenzhuoos .section-intro p {
    color: var(--text-secondary);
}

.os-showcase {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.os-slides {
    position: relative;
    height: 400px;
    margin-bottom: 30px;
}

.os-slide {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.os-slide.active {
    opacity: 1;
}

.os-slide img {
    max-width: 100%;
    max-height: 320px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    margin-bottom: 20px;
    border: 1px solid #e5e7eb;
}

.slide-info {
    text-align: center;
    color: var(--text-primary);
}

.slide-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

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

.os-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 30px;
    background: #ffffff;
    border: 1px solid #f1f5f9;
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    min-width: 100px;
    box-shadow: var(--shadow-sm);
}

.nav-btn:hover {
    border-color: #3b82f6;
    color: #3b82f6;
}

.nav-btn.active {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
}

.nav-btn i {
    font-size: 1.25rem;
}

.nav-btn span {
    font-size: 0.9rem;
    font-weight: 500;
}

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

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    background: #ffffff;
    border-radius: var(--radius-lg);
    border: 1px solid #f1f5f9;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.feature-item i {
    font-size: 1.5rem;
    color: #3b82f6;
}

.feature-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.feature-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* 核心特性 */
.features {
    padding: 80px 20px;
    background: #ffffff;
}

.feature-highlight {
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 40px;
    margin-bottom: 40px;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, #eff6ff 0%, #f5f3ff 100%);
    border: 1px solid #dbeafe;
    box-shadow: var(--shadow-sm);
}

.feature-highlight-icon {
    flex-shrink: 0;
    width: 88px;
    height: 88px;
    border-radius: var(--radius-lg);
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.25rem;
    color: white;
    box-shadow: var(--shadow-md);
}

.feature-highlight-tag {
    display: inline-block;
    padding: 4px 14px;
    margin-bottom: 12px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    color: white;
    font-size: 0.8rem;
    font-weight: 600;
}

.feature-highlight-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text-primary);
}

.feature-highlight-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin: 0;
}

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

.feature-card {
    background: #ffffff;
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid #f1f5f9;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: #3b82f6;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
}

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

.feature-card ul {
    list-style: none;
}

.feature-card ul li {
    padding: 8px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-card ul li::before {
    content: '✓';
    color: var(--success-color);
    font-weight: 700;
    font-size: 0.875rem;
}

/* 使用指南 */
.usage {
    padding: 80px 20px;
    background: #fafbfc;
}

/* Banner区域 */
.banner-section {
    padding: 40px 20px;
    background: #ffffff;
}

.banner-section .container {
    padding: 0;
}

.banner-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    cursor: zoom-in;
    transition: var(--transition);
}

.banner-image:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.steps-container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
}

.step-item {
    flex: 1;
    min-width: 200px;
    max-width: 250px;
    text-align: center;
}

.step-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.step-content {
    background: #ffffff;
    padding: 30px;
    border-radius: var(--radius-xl);
    transition: var(--transition);
    border: 1px solid #f1f5f9;
    box-shadow: var(--shadow-sm);
}

.step-item:hover .step-content {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: #3b82f6;
}

.step-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: white;
    margin: 0 auto 16px;
}

.step-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.step-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.step-arrow {
    display: none;
    color: var(--text-light);
    font-size: 1.5rem;
}

@media (min-width: 1024px) {
    .step-arrow {
        display: flex;
        align-items: center;
    }
}

/* 套餐价格 */
.pricing {
    padding: 80px 20px;
    background: #ffffff;
}

.pricing-group-title {
    text-align: center;
    margin-bottom: 32px;
}

.pricing-group-title h3 {
    display: inline-block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    position: relative;
    padding-bottom: 12px;
}

.pricing-group-title h3::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 48px;
    height: 3px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
}

/* 活动套餐分组与上一组保持间距 */
#annual-grid {
    margin-bottom: 56px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.pricing-card {
    background: #ffffff;
    border-radius: var(--radius-xl);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border: 1px solid #f1f5f9;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: #3b82f6;
}

.pricing-card.featured {
    border: 2px solid #3b82f6;
    background: #ffffff;
    transform: scale(1.03);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 20px;
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-badge.promo {
    background: var(--warning-color);
}

.pricing-header h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.pricing-header p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 24px;
}

.pricing-price {
    margin-bottom: 28px;
}

.pricing-price .currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: #3b82f6;
}

.pricing-price .amount {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.pricing-price .period {
    font-size: 1rem;
    color: var(--text-light);
}

.pricing-gift {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
    text-align: left;
}

.pricing-features li {
    padding: 12px 0;
    border-bottom: 1px solid #e5e7eb;
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.pricing-features li i {
    color: var(--success-color);
    font-size: 0.875rem;
}

.pricing-note {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    background: #f8fafc;
    border-radius: var(--radius-lg);
    border: 1px solid #e5e7eb;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 用户评价 */
.testimonials {
    padding: 80px 20px;
    background: #ffffff;
}

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

.testimonial-card {
    background: #ffffff;
    padding: 32px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid #f1f5f9;
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: #3b82f6;
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

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

.user-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.user-title {
    font-size: 0.85rem;
    color: var(--text-light);
}

.star-rating {
    margin-bottom: 16px;
}

.star-rating i {
    color: #fbbf24;
    font-size: 0.9rem;
    margin-right: 2px;
}

.star-rating i:last-child {
    margin-right: 0;
}

.testimonial-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 常见问题 */
.faq {
    padding: 80px 20px;
    background: #fafbfc;
}

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

.faq-item {
    background: #ffffff;
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    overflow: hidden;
    border: 1px solid #f1f5f9;
}

.faq-question {
    width: 100%;
    padding: 24px;
    background: none;
    border: none;
    text-align: left;
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(59, 130, 246, 0.05);
}

.faq-question i {
    font-size: 0.875rem;
    color: var(--text-light);
    transition: var(--transition);
}

.faq-question.active i {
    transform: rotate(180deg);
    color: #3b82f6;
}

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.faq-answer.open {
    padding: 0 24px 24px;
    max-height: 500px;
}

.faq-answer p {
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.faq-answer ul {
    margin-left: 20px;
    margin-bottom: 12px;
}

.faq-answer li {
    color: var(--text-secondary);
    padding: 6px 0;
    font-size: 0.95rem;
}

/* CTA区域 */
.cta {
    padding: 100px 20px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 40%, #f0f9ff 70%, #ffffff 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.cta h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.cta p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    position: relative;
    z-index: 1;
}

/* 页脚 */
.footer {
    padding: 60px 20px;
    background: #0f172a;
    color: rgba(255, 255, 255, 0.7);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.footer-logo i {
    font-size: 1.6rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    font-size: 0.95rem;
    line-height: 1.7;
    max-width: 300px;
}

.footer-links h4,
.footer-contact h4 {
    color: white;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.footer-links li,
.footer-contact li {
    padding: 10px 0;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact li i {
    color: #3b82f6;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 8px;
    font-size: 0.85rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 60px;
    }
    
    .hero-features {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .os-features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .btn-chat {
        display: none;
    }
    
    .hero {
        padding: 120px 20px 60px;
    }
    
    .hero h1 {
        font-size: 2.25rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .section-intro h2 {
        font-size: 1.75rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-highlight {
        flex-direction: column;
        text-align: center;
        padding: 32px 24px;
    }
    
    .steps-container {
        flex-direction: column;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .os-features {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .cta h2 {
        font-size: 1.75rem;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero-features {
        gap: 12px;
    }
    
    .feature-tag {
        padding: 8px 14px;
        font-size: 0.75rem;
    }
    
    .pricing-card {
        padding: 25px;
    }
    
    .pricing-price .amount {
        font-size: 2.5rem;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

/* 图片预览模态框 */
.image-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

.image-modal.active {
    display: flex;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.image-modal-content {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: var(--radius-lg);
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from { 
        transform: scale(0.8);
        opacity: 0;
    }
    to { 
        transform: scale(1);
        opacity: 1;
    }
}

.image-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.image-modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.image-modal-close i {
    font-size: 1.2rem;
}

/* 可点击图片样式 */
.clickable-image {
    cursor: zoom-in;
    transition: var(--transition);
}

.clickable-image:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl);
}

/* ===== CSS 绘制图标（替代 Font Awesome，纯 ::before/::after + clip-path/box-shadow） ===== */
.ic {
    display: inline-block;
    position: relative;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    line-height: 1;
    box-sizing: border-box;
}

/* 对勾 ✓ */
.ic-check::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.45em;
    height: 0.22em;
    border-left: 0.12em solid currentColor;
    border-bottom: 0.12em solid currentColor;
    transform: translate(-50%, -75%) rotate(-45deg);
}

/* 星星 ★ */
.ic-star::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1em;
    height: 1em;
    background: currentColor;
    transform: translate(-50%, -50%);
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

/* 用户头像 */
.ic-user::before {
    content: '';
    position: absolute;
    top: 0.08em;
    left: 50%;
    transform: translateX(-50%);
    width: 0.4em;
    height: 0.4em;
    background: currentColor;
    border-radius: 50%;
}
.ic-user::after {
    content: '';
    position: absolute;
    bottom: 0.05em;
    left: 50%;
    transform: translateX(-50%);
    width: 0.78em;
    height: 0.4em;
    background: currentColor;
    border-radius: 0.39em 0.39em 0 0;
}

/* X 关闭 */
.ic-times::before, .ic-times::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.65em;
    height: 0.12em;
    background: currentColor;
    transform: translate(-50%, -50%) rotate(45deg);
}
.ic-times::after {
    transform: translate(-50%, -50%) rotate(-45deg);
}

/* 汉堡菜单 ≡ */
.ic-bars::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.7em;
    height: 0.12em;
    background: currentColor;
    transform: translate(-50%, -50%);
    box-shadow: 0 -0.25em 0 0 currentColor, 0 0.25em 0 0 currentColor;
}

/* 盾牌（安全） */
.ic-shield::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.78em;
    height: 1em;
    background: currentColor;
    transform: translate(-50%, -50%);
    clip-path: polygon(50% 0%, 100% 14%, 100% 55%, 50% 100%, 0% 55%, 0% 14%);
}
.ic-shield::after {
    content: '';
    position: absolute;
    top: 56%;
    left: 50%;
    width: 0.28em;
    height: 0.14em;
    border-left: 0.1em solid #fff;
    border-bottom: 0.1em solid #fff;
    transform: translate(-50%, -50%) rotate(-45deg);
}

/* 插头（连接） */
.ic-plug::before {
    content: '';
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translateX(-50%);
    width: 0.5em;
    height: 0.4em;
    background: currentColor;
    border-radius: 0 0 0.1em 0.1em;
}
.ic-plug::after {
    content: '';
    position: absolute;
    top: 8%;
    left: 50%;
    transform: translateX(-50%);
    width: 0.12em;
    height: 0.3em;
    background: currentColor;
    box-shadow: -0.22em 0 0 0 currentColor, 0.22em 0 0 0 currentColor;
}

/* 无限 ∞ */
.ic-infinity::before, .ic-infinity::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 0.45em;
    height: 0.45em;
    border: 0.12em solid currentColor;
    border-radius: 50%;
    box-sizing: border-box;
    transform: translateY(-50%);
}
.ic-infinity::before {
    left: 0.02em;
}
.ic-infinity::after {
    right: 0.02em;
}

/* 网络（中心节点 + 连接线） */
.ic-network::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.22em;
    height: 0.22em;
    background: currentColor;
    border-radius: 50%;
    box-shadow:
        -0.4em -0.4em 0 0 currentColor,
        0.4em -0.4em 0 0 currentColor,
        -0.4em 0.4em 0 0 currentColor,
        0.4em 0.4em 0 0 currentColor;
}
.ic-network::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.7em;
    height: 0.7em;
    border: 0.08em solid currentColor;
    border-radius: 50%;
    box-sizing: border-box;
}

/* 芯片（硬件） */
.ic-chip::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.55em;
    height: 0.55em;
    background: currentColor;
    border-radius: 0.08em;
}
.ic-chip::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.18em;
    height: 0.18em;
    background: #fff;
    border-radius: 0.03em;
    box-shadow:
        -0.42em 0 0 0 currentColor,
        0.42em 0 0 0 currentColor,
        0 -0.42em 0 0 currentColor,
        0 0.42em 0 0 currentColor;
}

/* 硬盘 */
.ic-drive::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.92em;
    height: 0.55em;
    background: currentColor;
    border-radius: 0.1em;
}
.ic-drive::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 15%;
    transform: translate(0, -50%);
    width: 0.12em;
    height: 0.12em;
    background: #fff;
    border-radius: 50%;
}

/* 减号 − */
.ic-minus::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.6em;
    height: 0.12em;
    background: currentColor;
    transform: translate(-50%, -50%);
}

/* 信息 ⓘ */
.ic-info::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.85em;
    height: 0.85em;
    border: 0.12em solid currentColor;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-sizing: border-box;
}
.ic-info::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.1em;
    height: 0.32em;
    background: currentColor;
    transform: translate(-50%, -45%);
    border-radius: 0.05em;
    box-shadow: 0 -0.22em 0 0 currentColor;
}

/* 路线 ┐╱ */
.ic-route::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.7em;
    height: 0.45em;
    border: 0.12em solid currentColor;
    border-top: none;
    border-right: none;
    border-radius: 0 0 0 0.4em;
    transform: translate(-50%, -55%);
    box-sizing: border-box;
}
.ic-route::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.18em;
    height: 0.18em;
    background: currentColor;
    border-radius: 50%;
    transform: translate(-50%, 0.1em);
    box-shadow: 0.55em -0.55em 0 0 currentColor;
}

/* 解锁（开锁弧 + 锁体） */
.ic-unlock::before {
    content: '';
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translateX(-50%);
    width: 0.55em;
    height: 0.45em;
    background: currentColor;
    border-radius: 0.1em;
}
.ic-unlock::after {
    content: '';
    position: absolute;
    top: 8%;
    left: 30%;
    width: 0.35em;
    height: 0.35em;
    border: 0.12em solid currentColor;
    border-right: none;
    border-radius: 0.35em 0 0 0.35em;
    box-sizing: border-box;
}

/* 信号格 ▁▂▃▄ */
.ic-signal::before {
    content: '';
    position: absolute;
    bottom: 10%;
    left: 20%;
    width: 0.15em;
    height: 0.25em;
    background: currentColor;
    box-shadow:
        0.25em -0.1em 0 0 currentColor,
        0.25em -0.1em 0 0 currentColor;
}
.ic-signal::after {
    content: '';
    position: absolute;
    bottom: 10%;
    left: 20%;
    width: 0.15em;
    height: 0.25em;
    background: currentColor;
    box-shadow:
        0.25em 0 0 -0.05em currentColor,
        0.5em 0 0 -0.1em currentColor,
        0.5em -0.2em 0 0 currentColor,
        0.25em -0.1em 0 0 transparent;
}

/* 仪表（半圆 + 指针） */
.ic-gauge::before {
    content: '';
    position: absolute;
    top: 30%;
    left: 50%;
    width: 0.85em;
    height: 0.45em;
    border: 0.12em solid currentColor;
    border-bottom: none;
    border-radius: 0.45em 0.45em 0 0;
    transform: translateX(-50%);
    box-sizing: border-box;
}
.ic-gauge::after {
    content: '';
    position: absolute;
    top: 65%;
    left: 50%;
    width: 0.3em;
    height: 0.12em;
    background: currentColor;
    transform: translateX(-50%) rotate(-35deg);
    transform-origin: left center;
    border-radius: 0.05em;
}

/* 图层堆叠 ▦ */
.ic-layers::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.6em;
    height: 0.55em;
    background: currentColor;
    border-radius: 0.05em;
    transform: translate(-50%, -50%);
}
.ic-layers::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.6em;
    height: 0.55em;
    border: 0.12em solid currentColor;
    border-radius: 0.05em;
    transform: translate(-35%, -75%);
    box-sizing: border-box;
}

/* 闪电 ⚡ */
.ic-bolt::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.5em;
    height: 0.85em;
    background: currentColor;
    transform: translate(-50%, -50%);
    clip-path: polygon(55% 0%, 0% 55%, 40% 55%, 30% 100%, 100% 35%, 55% 35%);
}

/* 文件夹树 */
.ic-folder-tree::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.45em;
    height: 0.32em;
    background: currentColor;
    border-radius: 0.05em 0.05em 0 0;
    transform: translate(-90%, -50%);
}
.ic-folder-tree::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.4em;
    height: 0.4em;
    border: 0.12em solid currentColor;
    border-left: none;
    border-top: none;
    transform: translate(0, -50%);
    box-sizing: border-box;
}

/* 用户盾牌（盾 + 白点头像） */
.ic-user-shield::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.78em;
    height: 1em;
    background: currentColor;
    transform: translate(-50%, -50%);
    clip-path: polygon(50% 0%, 100% 14%, 100% 55%, 50% 100%, 0% 55%, 0% 14%);
}
.ic-user-shield::after {
    content: '';
    position: absolute;
    top: 42%;
    left: 50%;
    width: 0.22em;
    height: 0.22em;
    background: #fff;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0.18em 0 -0.02em #fff, 0 0.18em 0 -0.02em #fff;
}

/* 锁（闭合弧 + 锁体） */
.ic-lock::before {
    content: '';
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translateX(-50%);
    width: 0.55em;
    height: 0.45em;
    background: currentColor;
    border-radius: 0.1em;
}
.ic-lock::after {
    content: '';
    position: absolute;
    top: 8%;
    left: 50%;
    transform: translateX(-50%);
    width: 0.35em;
    height: 0.35em;
    border: 0.12em solid currentColor;
    border-bottom: none;
    border-radius: 0.35em 0.35em 0 0;
    box-sizing: border-box;
}

/* 桌面显示器 */
.ic-desktop::before {
    content: '';
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 0.9em;
    height: 0.6em;
    border: 0.12em solid currentColor;
    border-radius: 0.08em;
    box-sizing: border-box;
}
.ic-desktop::after {
    content: '';
    position: absolute;
    bottom: 8%;
    left: 50%;
    transform: translateX(-50%);
    width: 0.35em;
    height: 0.18em;
    background: currentColor;
    box-shadow: 0 0.15em 0 -0.05em currentColor;
    border-radius: 0 0 0.05em 0.05em;
}

/* 云 ☁ */
.ic-cloud::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.55em;
    height: 0.55em;
    background: currentColor;
    border-radius: 50%;
    transform: translate(-65%, -30%);
}
.ic-cloud::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.85em;
    height: 0.45em;
    background: currentColor;
    border-radius: 0.4em;
    transform: translate(-50%, 0);
}

/* 图片（框 + 山 + 太阳） */
.ic-image::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.85em;
    height: 0.7em;
    border: 0.12em solid currentColor;
    border-radius: 0.08em;
    transform: translate(-50%, -50%);
    box-sizing: border-box;
}
.ic-image::after {
    content: '';
    position: absolute;
    top: 60%;
    left: 50%;
    width: 0;
    height: 0;
    border-left: 0.22em solid transparent;
    border-right: 0.22em solid transparent;
    border-bottom: 0.22em solid currentColor;
    transform: translate(-130%, 5%);
}

/* 打开文件夹 */
.ic-folder-open::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.85em;
    height: 0.55em;
    background: currentColor;
    border-radius: 0.05em 0.1em 0.1em 0.1em;
    transform: translate(-50%, -30%);
}
.ic-folder-open::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.85em;
    height: 0.18em;
    background: currentColor;
    border-radius: 0 0.1em 0.1em 0;
    transform: translate(-50%, 50%);
}

/* 地球仪（圆 + 经纬线） */
.ic-globe::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.85em;
    height: 0.85em;
    border: 0.12em solid currentColor;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-sizing: border-box;
}
.ic-globe::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.85em;
    height: 0.12em;
    background: currentColor;
    transform: translate(-50%, -50%);
}

/* 向右箭头 → */
.ic-arrow-right::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.5em;
    height: 0.5em;
    border-top: 0.12em solid currentColor;
    border-right: 0.12em solid currentColor;
    transform: translate(-65%, -50%) rotate(45deg);
    box-sizing: border-box;
}
.ic-arrow-right::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 20%;
    width: 0.7em;
    height: 0.12em;
    background: currentColor;
    transform: translateY(-50%);
}

/* 二维码 ▦ */
.ic-qrcode::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.85em;
    height: 0.85em;
    border: 0.12em solid currentColor;
    border-radius: 0.05em;
    transform: translate(-50%, -50%);
    box-sizing: border-box;
}
.ic-qrcode::after {
    content: '';
    position: absolute;
    top: 22%;
    left: 22%;
    width: 0.18em;
    height: 0.18em;
    background: currentColor;
    box-shadow:
        0.3em 0 0 0 currentColor,
        0 0.3em 0 0 currentColor,
        0.3em 0.3em 0 -0.05em currentColor;
}

/* 站点地图（层级树） */
.ic-sitemap::before {
    content: '';
    position: absolute;
    top: 8%;
    left: 50%;
    width: 0.22em;
    height: 0.22em;
    background: currentColor;
    border-radius: 0.04em;
    transform: translateX(-50%);
    box-shadow:
        -0.35em 0.55em 0 0 currentColor,
        0 0.55em 0 0 currentColor,
        0.35em 0.55em 0 0 currentColor;
}
.ic-sitemap::after {
    content: '';
    position: absolute;
    top: 30%;
    left: 50%;
    width: 0.12em;
    height: 0.4em;
    background: currentColor;
    transform: translateX(-50%);
    box-shadow:
        -0.35em 0.1em 0 0 currentColor,
        0.35em 0.1em 0 0 currentColor,
        -0.35em 0 0 0 0 currentColor,
        0.35em 0 0 0 0 currentColor;
}

/* 向下折叠箭头 v */
.ic-chevron-down::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.45em;
    height: 0.45em;
    border-left: 0.12em solid currentColor;
    border-bottom: 0.12em solid currentColor;
    transform: translate(-50%, -65%) rotate(-45deg);
    box-sizing: border-box;
}

/* 半盾（盾牌的简化变体，使用空心版本） */
.ic-shield-half::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.78em;
    height: 1em;
    background: currentColor;
    transform: translate(-50%, -50%);
    clip-path: polygon(50% 0%, 100% 14%, 100% 55%, 50% 100%, 50% 0%);
}

/* 摄像头（监控） */
.ic-video::before {
    content: '';
    position: absolute;
    top: 35%;
    left: 12%;
    width: 0.52em;
    height: 0.3em;
    background: currentColor;
    border-radius: 0.04em 0 0 0.04em;
}
.ic-video::after {
    content: '';
    position: absolute;
    top: 32%;
    right: 14%;
    width: 0.28em;
    height: 0.28em;
    border: 0.1em solid currentColor;
    border-radius: 50%;
    box-sizing: border-box;
}

/* 数据库 */
.ic-database::before {
    content: '';
    position: absolute;
    top: 15%;
    left: 50%;
    transform: translateX(-50%);
    width: 0.7em;
    height: 0.7em;
    background: currentColor;
    border-radius: 0.12em;
}
.ic-database::after {
    content: '';
    position: absolute;
    top: 28%;
    left: 50%;
    transform: translateX(-50%);
    width: 0.7em;
    height: 0.08em;
    background: rgba(255,255,255,0.5);
    box-shadow: 0 0.22em 0 0 rgba(255,255,255,0.5);
}

/* 齿轮（设置） */
.ic-cog::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.5em;
    height: 0.5em;
    border: 0.14em solid currentColor;
    border-radius: 50%;
    box-sizing: border-box;
}
.ic-cog::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.12em;
    height: 0.12em;
    background: currentColor;
    border-radius: 50%;
    box-shadow:
        0 -0.36em 0 0 currentColor,
        0 0.36em 0 0 currentColor,
        -0.36em 0 0 0 currentColor,
        0.36em 0 0 0 currentColor,
        0.26em -0.26em 0 0 currentColor,
        0.26em 0.26em 0 0 currentColor,
        -0.26em -0.26em 0 0 currentColor,
        -0.26em 0.26em 0 0 currentColor;
}

/* 眼睛（查看） */
.ic-eye::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.82em;
    height: 0.42em;
    border: 0.12em solid currentColor;
    border-radius: 50%;
    box-sizing: border-box;
}
.ic-eye::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.18em;
    height: 0.18em;
    background: currentColor;
    border-radius: 50%;
}