/* 
 * 南京众行能源科技有限公司官网样式
 * 配色方案：红色#CB232A、绿色#6A9E42、蓝色#2B4F94
 * 设计理念：高端大气、科技感、现代简约
 */

/* CSS变量定义 */
:root {
    /* 品牌主色 */
    --primary-red: #CB232A;
    --primary-red-dark: #A01C22;
    --primary-red-light: #E0454A;

    /* 辅助色 */
    --tech-green: #6A9E42;
    --tech-green-dark: #547E34;
    --tech-green-light: #7CB858;

    --tech-blue: #2B4F94;
    --tech-blue-dark: #1E3A6E;
    --tech-blue-light: #3A66B8;

    /* 中性色 */
    --bg-dark: #0A0E17;
    --bg-darker: #05080F;
    --bg-card: rgba(20, 25, 40, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --border-color: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.15);

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, var(--primary-red) 0%, var(--tech-blue) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--tech-green) 0%, var(--tech-blue) 100%);
    --gradient-glow: linear-gradient(135deg, var(--primary-red) 0%, var(--tech-blue) 50%, var(--tech-green) 100%);

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow-red: 0 0 30px rgba(203, 35, 42, 0.4);
    --shadow-glow-blue: 0 0 30px rgba(43, 79, 148, 0.4);
    --shadow-glow-green: 0 0 30px rgba(106, 158, 66, 0.4);

    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* 字体 */
    --font-primary: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

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

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

body {
    font-family: var(--font-primary);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 容器 */
.container {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 段落样式 */
p {
    margin-bottom: 1rem;
}

/* 链接样式 */
a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

/* 列表样式 */
ul {
    list-style: none;
}

/* 图片响应式 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 按钮基础样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::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: var(--transition-normal);
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow-red);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(203, 35, 42, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-light);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-red);
    color: var(--primary-red);
}

.btn-block {
    width: 100%;
}

/* ============================================
   粒子背景
   ============================================ */
#particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

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

.particle:nth-child(2n) {
    background: var(--tech-blue);
    animation-delay: -5s;
}

.particle:nth-child(3n) {
    background: var(--tech-green);
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }

    10% {
        opacity: 0.3;
    }

    90% {
        opacity: 0.3;
    }

    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* ============================================
   导航栏
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 48px;
    height: 48px;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 10px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ============================================
   首页横幅
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(203, 35, 42, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(43, 79, 148, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(106, 158, 66, 0.1) 0%, transparent 50%);
    z-index: -1;
}

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

.hero-text {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
}

.title-line {
    display: block;
    color: var(--text-primary);
}

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

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--tech-green);
    margin-bottom: 16px;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

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

/* 充电动画 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.charging-animation {
    position: relative;
    width: 400px;
    height: 400px;
}

.charge-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow:
        0 0 60px rgba(203, 35, 42, 0.5),
        0 0 100px rgba(43, 79, 148, 0.3),
        inset 0 0 30px rgba(255, 255, 255, 0.2);
    animation: pulse 2s infinite ease-in-out;
}

.charge-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 2px solid transparent;
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

.ring-1 {
    width: 150px;
    height: 150px;
    border-top-color: var(--primary-red);
    border-right-color: var(--primary-red);
    animation: spin 3s linear infinite;
}

.ring-2 {
    width: 220px;
    height: 220px;
    border-bottom-color: var(--tech-blue);
    border-left-color: var(--tech-blue);
    animation: spin 4s linear infinite reverse;
}

.ring-3 {
    width: 300px;
    height: 300px;
    border-top-color: var(--tech-green);
    animation: spin 5s linear infinite;
}

.energy-particle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--primary-red);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--primary-red);
    animation: orbit 4s infinite linear;
}

.p1 {
    animation-delay: 0s;
}

.p2 {
    animation-delay: -1.3s;
}

.p3 {
    animation-delay: -2.6s;
}

@keyframes pulse {

    0%,
    100% {
        transform: translate(-50%, -50%) scale(1);
        box-shadow:
            0 0 60px rgba(203, 35, 42, 0.5),
            0 0 100px rgba(43, 79, 148, 0.3);
    }

    50% {
        transform: translate(-50%, -50%) scale(1.1);
        box-shadow:
            0 0 80px rgba(203, 35, 42, 0.7),
            0 0 120px rgba(43, 79, 148, 0.5);
    }
}

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

    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

@keyframes orbit {
    from {
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(0deg) translateX(150px);
    }

    to {
        transform: translate(-50%, -50%) rotate(360deg) translateX(150px);
    }
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 24px;
    height: 40px;
    border: 2px solid var(--border-light);
    border-radius: 12px;
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary-red);
    border-radius: 2px;
    animation: scrollDown 1.5s infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

@keyframes scrollDown {
    0% {
        opacity: 1;
        top: 8px;
    }

    100% {
        opacity: 0;
        top: 20px;
    }
}

/* ============================================
   通用区块样式
   ============================================ */
.section {
    padding: 100px 0;
    position: relative;
}

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

.section-tag {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary-red);
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.section-header.light .section-tag {
    color: var(--tech-green);
}

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

.section-header.light .section-title {
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   关于众行
   ============================================ */
.about {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

.about-content {
    max-width: 1200px;
    margin: 0 auto;
}

.about-main {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text .lead-text {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

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

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

.stat-unit {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-red);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition-normal);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

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

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

/* ============================================
   产品中心
   ============================================ */
.products {
    background: var(--bg-dark);
}

.product-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
}

.tab-btn {
    padding: 12px 24px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.tab-btn:hover {
    border-color: var(--primary-red);
    color: var(--primary-red);
}

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

/* 产品网格 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 32px;
}

.product-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-red);
    box-shadow: var(--shadow-lg), 0 0 40px rgba(203, 35, 42, 0.2);
}

.product-card.hidden {
    display: none;
}

.product-card.featured {
    border-color: var(--tech-green);
}

.featured-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 6px 16px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    z-index: 10;
}

/* 产品图片高度增加 */
.product-image {
    position: relative;
    height: 280px;
    background: linear-gradient(135deg, rgba(10, 14, 23, 0.8) 0%, rgba(20, 30, 50, 0.8) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* 移动端产品图片高度稍微短一点 */
/*@media (max-width: 768px) {*/
/*    .product-image {*/
/*        height: 200px;*/
/*    }*/
/*}*/

.product-placeholder {
    width: 120px;
    height: 120px;
}

.product-placeholder svg {
    width: 100%;
    height: 100%;
}

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 14, 23, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

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

.view-details-btn {
    padding: 14px 32px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transform: translateY(20px);
    transition: var(--transition-normal);
}

.product-card:hover .view-details-btn {
    transform: translateY(0);
}

.view-details-btn:hover {
    box-shadow: var(--shadow-glow-red);
}

.product-info {
    padding: 28px;
}

.product-category {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(203, 35, 42, 0.15);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--primary-red);
    margin-bottom: 16px;
}

.product-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.product-specs {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.product-specs.highlight {
    color: var(--tech-green);
    font-weight: 600;
}

/* 产品描述 - 限制3行显示省略号 */
.product-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
    /* 限制最多3行，超出显示省略号 */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    max-height: 5.1em;
    transition: max-height 0.3s ease;
}

/* 展开状态 */
.product-desc.expanded {
    -webkit-line-clamp: unset;
    max-height: 1000px;
}

/* 查看详情按钮 */
.view-details-btn {
    padding: 14px 32px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transform: translateY(20px);
    transition: var(--transition-normal);
}

.product-card:hover .view-details-btn {
    transform: translateY(0);
}

.view-details-btn:hover {
    box-shadow: var(--shadow-glow-red);
}

/* 产品信息区域 */
.product-info {
    padding: 28px;
}

.product-features {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.product-features li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--tech-green);
    border-radius: 50%;
}

/* ============================================
   应用场景
   ============================================ */
.scenarios {
    background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    position: relative;
    overflow: hidden;
}

.scenarios-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 30% 30%, rgba(106, 158, 66, 0.1) 0%, transparent 40%),
        radial-gradient(ellipse at 70% 70%, rgba(43, 79, 148, 0.1) 0%, transparent 40%);
    z-index: 0;
}

.scenarios .container {
    position: relative;
    z-index: 1;
}

.section-header.light {
    color: var(--text-primary);
}

.section-header.light .section-subtitle {
    color: var(--text-secondary);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
}

.scenario-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 36px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.scenario-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.scenario-card:hover {
    transform: translateY(-8px);
    border-color: var(--tech-green);
    box-shadow: var(--shadow-glow-green);
}

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

.scenario-icon {
    width: 72px;
    height: 72px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: var(--transition-normal);
}

.scenario-card:hover .scenario-icon {
    transform: scale(1.1) rotate(5deg);
}

.scenario-icon svg {
    width: 36px;
    height: 36px;
    color: var(--text-primary);
}

.scenario-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

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

.scenario-features {
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.scenario-features li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.scenario-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--tech-green);
    border-radius: 2px;
    transform: rotate(45deg);
}

/* ============================================
   合作伙伴
   ============================================ */
.partners {
    background: var(--bg-dark);
    overflow: hidden;
}

.partners-slider {
    position: relative;
    width: 100%;
    overflow: hidden;
    padding: 20px 0;
}

.partners-track {
    display: flex;
    gap: 40px;
    animation: scroll 30s linear infinite;
    width: max-content;
}

@keyframes scroll {
    from {
        transform: translateX(0);
    }

    to {
        transform: translateX(calc(-50% - 20px));
    }
}

.partner-logo {
    flex-shrink: 0;
    width: 180px;
    height: 80px;
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.partner-logo:hover {
    border-color: var(--primary-red);
    transform: scale(1.05);
    box-shadow: var(--shadow-glow-red);
}

.partner-logo svg {
    width: 100%;
    height: 100%;
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: all var(--transition-normal);
}

.partner-logo:hover img {
    transform: scale(1.05);
}

/* ============================================
   联系我们
   ============================================ */
.contact {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.info-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all var(--transition-normal);
}

.info-card:hover {
    transform: translateX(8px);
    border-color: var(--primary-red);
}

.info-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.info-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.info-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.6;
}

/* 联系表单 */
.contact-form-wrapper {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px;
}

.contact-form-wrapper h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 32px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: rgba(10, 14, 23, 0.8);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-red);
    box-shadow: 0 0 0 3px rgba(203, 35, 42, 0.2);
}

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

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
}

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

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

.contact-form .btn svg {
    width: 18px;
    height: 18px;
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--bg-darker);
    padding: 80px 0 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: 80px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--border-color);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    width: 44px;
    height: 44px;
}

.footer-logo span {
    font-size: 1.3rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

.footer-qrcode {
    margin-top: 24px;
}

.footer-qrcode img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.qrcode-placeholder {
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.qrcode-placeholder svg {
    width: 100%;
    height: 100%;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
    position: relative;
}

.footer-column h4::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 32px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-column a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    position: relative;
}

.footer-column a:hover {
    color: var(--primary-red);
    padding-left: 8px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* ============================================
   弹窗
   ============================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transform: scale(0.9);
    transition: var(--transition-normal);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    z-index: 10;
}

.modal-close:hover {
    background: var(--primary-red);
    border-color: var(--primary-red);
}

.modal-body {
    padding: 40px;
    overflow-y: auto;
    max-height: 90vh;
}

/* ============================================
   动画效果
   ============================================ */
.reveal-item {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1200px) {
    .hero-content {
        gap: 40px;
    }

    .hero-title {
        font-size: 3.2rem;
    }

    .about-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

@media (max-width: 992px) {
    .section {
        padding: 80px 0;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 2.8rem;
    }

    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }

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

    .hero-visual {
        order: -1;
    }

    .charging-animation {
        width: 300px;
        height: 300px;
    }

    .product-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }

    .scenarios-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media(max-width:768px) {
    .cert-item img {
        width: 100% !important;
    }

}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transition: var(--transition-normal);
        z-index: 999;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 1000;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2.2rem;
    }

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

    .stat-number {
        font-size: 2rem;
    }

    .product-tabs {
        gap: 8px;
    }

    .tab-btn {
        padding: 10px 16px;
        font-size: 0.85rem;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .scenarios-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form-wrapper {
        padding: 28px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 80px 0 40px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

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

    .btn {
        width: 100%;
    }

    .charging-animation {
        width: 240px;
        height: 240px;
    }

    .charge-core {
        width: 70px;
        height: 70px;
    }

    .about-stats {
        grid-template-columns: 1fr 1fr;
    }

    .stat-label {
        font-size: 0.8rem;
    }

    .product-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 10px;
    }

    .tab-btn {
        flex-shrink: 0;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* ============================================
   公司资质证书 - 高级版
   ============================================ */
.certificates {
    background: var(--bg-dark);
    padding: 120px 0;
    position: relative;
    overflow: hidden;
}

.certificates::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 15% 30%, rgba(203, 35, 42, 0.08) 0%, transparent 40%),
        radial-gradient(ellipse at 85% 70%, rgba(43, 79, 148, 0.08) 0%, transparent 40%),
        radial-gradient(ellipse at 50% 50%, rgba(106, 158, 66, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.certificates .container {
    position: relative;
    z-index: 1;
}

/* 资质证书网格布局 - 支持不同行数 */
.certificates-grid {
    display: grid;
    gap: 24px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 0;
}

/* 5列均分布局 */
.certificates-grid-5 {
    grid-template-columns: repeat(5, 1fr);
}

/* 3列均分布局 - 用于第一排和第二排 */
.certificates-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* 资质荣誉移动端响应式 - 每排2张图片均分 */
@media (max-width: 768px) {

    .certificates-grid-row,
    .certificates-grid-row-5 {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px;
        height:250px;
    }

    .certificates-grid-row {
        margin-top: 12px;
    }

    .certificates-grid-row-5 {
        margin-top: 12px;
    }
}

/* 第一排：3张均分 */
.cert-row-1,
.cert-row-2 {
    display: contents;
}

/* 第一排的证书项目 */
.cert-row-1 .cert-item,
.cert-row-2 .cert-item {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: default;
    opacity: 0;
    transform: translateY(60px);
}

.cert-row-1 .cert-item.visible,
.cert-row-2 .cert-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 第三排、第四排：5张均分 */
.cert-row-3,
.cert-row-4,
.cert-row-5 {
    display: contents;
}

.cert-row-3 .cert-item,
.cert-row-4 .cert-item,
.cert-row-5 .cert-item {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: default;
    opacity: 0;
    transform: translateY(60px);
}

.cert-row-3 .cert-item.visible,
.cert-row-4 .cert-item.visible,
.cert-row-5 .cert-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.cert-item img {
    width: auto;
    height: auto;
    max-width: 100%;
    display: block;
    position: relative;
    z-index: 0;
}

/* 证书角落装饰 */
.cert-item .corner-decoration {
    display: none;
}

.cert-item .corner-decoration.top-left {
    display: none;
}

.cert-item .corner-decoration.top-right {
    display: none;
}

.cert-item .corner-decoration.bottom-left {
    display: none;
}

.cert-item .corner-decoration.bottom-right {
    display: none;
}

/* 证书悬浮光效 */
.cert-item .glow-effect {
    display: none;
}

.cert-item:hover .glow-effect {
    display: none;
}

.cert-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    position: relative;
    overflow: hidden;
}

.cert-placeholder::before {
    content: '';
    position: absolute;
    width: 150%;
    height: 150%;
    background: conic-gradient(from 0deg, transparent, rgba(203, 35, 42, 0.1), transparent 30%);
    animation: rotate 8s linear infinite;
}

.cert-placeholder svg {
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 1;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* 悬浮详情遮罩 */
.cert-overlay {
    display: none;
}

.cert-item:hover .cert-overlay {
    display: none;
}

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

.cert-overlay p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================
   改造维保
   ============================================ */
.renovation {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    position: relative;
    overflow: hidden;
    padding: 100px 0;
}

.renovation-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(203, 35, 42, 0.08) 0%, transparent 40%),
        radial-gradient(ellipse at 80% 70%, rgba(106, 158, 66, 0.08) 0%, transparent 40%);
    z-index: 0;
}

.renovation .container {
    position: relative;
    z-index: 1;
}

.renovation-showcase {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-bottom: 60px;
}

.renovation-item {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 30px;
    transition: all var(--transition-normal);
}

.renovation-item:hover {
    border-color: var(--tech-green);
    box-shadow: var(--shadow-glow-green);
}

.renovation-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: center;
}

.comparison-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.comparison-item:hover {
    transform: scale(1.03);
}

.comparison-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: all var(--transition-normal);
}

.comparison-item:hover img {
    transform: scale(1.05);
}

.comparison-label {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 6px 14px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    z-index: 10;
}

.comparison-item.before .comparison-label {
    color: var(--primary-red);
}

.comparison-item.after .comparison-label {
    color: var(--tech-green);
}

.comparison-arrow {
    display: none;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
}

.image-placeholder svg {
    width: 100%;
    height: 100%;
}

.renovation-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.renovation-features .feature-item {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
    transition: all var(--transition-normal);
}

.renovation-features .feature-item:hover {
    transform: translateY(-6px);
    border-color: var(--tech-green);
    box-shadow: var(--shadow-glow-green);
}

.renovation-features .feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: all var(--transition-normal);
}

.renovation-features .feature-item:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.renovation-features .feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--text-primary);
}

.renovation-features .feature-item h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.renovation-features .feature-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* ============================================
   改造维保 - 新版布局样式
   ============================================ */
.renovation-showcase {
    display: flex;
    flex-direction: column;
    gap: 50px;
    margin-bottom: 60px;
}

.before-after-section {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 30px;
    transition: all var(--transition-normal);
}

.before-after-section:hover {
    border-color: var(--tech-green);
    box-shadow: var(--shadow-glow-green);
}

.section-group-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.section-group-title .title-icon {
    font-size: 1.2rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.before-title {
    color: var(--text-warning);
}

.before-title .title-icon {
    background: rgba(203, 35, 42, 0.15);
    color: var(--text-warning);
}

.after-title {
    color: var(--tech-green);
}

.after-title .title-icon {
    background: rgba(106, 158, 66, 0.15);
    color: var(--tech-green);
}

.section-group-title h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0;
}

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

.before-grid .grid-item:hover img {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.after-grid .grid-item:hover img {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.grid-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.grid-item:hover {
    border-color: var(--tech-green);
    box-shadow: var(--shadow-glow-green);
}

.grid-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all var(--transition-normal);
}

/* 垂直箭头样式 - 简洁版直线箭头 */
.vertical-arrow-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 0;
}

.vertical-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

/* 简洁的直线箭头 - 渐变线条 */
.arrow-line-vertical {
    width: 2px;
    height: 40px;
    background: linear-gradient(180deg,
            var(--primary-red) 0%,
            var(--tech-green) 100%);
    border-radius: 1px;
    position: relative;
}

/* 简洁箭头头 - 三角形箭头 */
.simple-arrow-head {
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 8px solid var(--tech-green);
    position: relative;
    filter: drop-shadow(0 2px 3px rgba(106, 158, 66, 0.4));
}

/* 成对比较布局样式 */
.comparison-pairs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    width: 100%;
}

.comparison-pair {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 20px;
    transition: all var(--transition-normal);
}

.comparison-pair:hover {
    border-color: var(--tech-green);
    box-shadow: var(--shadow-glow-green);
}

.comparison-item {
    position: relative;
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.comparison-item:hover {
    transform: scale(1.02);
}

.comparison-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: all var(--transition-normal);
}

.comparison-item:hover img {
    transform: scale(1.03);
}

.comparison-label {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 4px 12px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-primary);
    z-index: 10;
}

.comparison-item.before .comparison-label {
    color: var(--primary-red);
}

.comparison-item.after .comparison-label {
    color: var(--tech-green);
}

/* 响应式 - 成对比较布局 */
@media (max-width: 1400px) {
    .comparison-pairs-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 992px) {
    .comparison-pairs-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .comparison-pair {
        padding: 16px;
        border-radius: var(--radius-lg);
    }
}

@media (max-width: 768px) {
    .comparison-pairs-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .comparison-pair {
        padding: 12px;
        border-radius: var(--radius-md);
    }
}

@media (max-width: 480px) {
    .comparison-pairs-grid {
        gap: 10px;
    }

    .comparison-pair {
        padding: 10px;
    }

    .comparison-label {
        font-size: 0.7rem;
        padding: 3px 10px;
    }
}

.arrow-circle-vertical {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg,
            var(--bg-glass) 0%,
            rgba(106, 158, 66, 0.2) 100%);
    border: 2px solid var(--tech-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow:
        0 0 15px rgba(106, 158, 66, 0.3),
        inset 0 0 10px rgba(106, 158, 66, 0.1);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    z-index: 2;
}

.arrow-circle-vertical::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(106, 158, 66, 0.4), transparent 30%);
    animation: rotate 4s linear infinite;
}

.arrow-circle-vertical svg {
    width: 18px;
    height: 18px;
    color: var(--tech-green);
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 0 3px rgba(106, 158, 66, 0.5));
}

.arrow-circle-vertical:hover {
    transform: scale(1.15);
    box-shadow:
        0 0 25px rgba(106, 158, 66, 0.5),
        inset 0 0 15px rgba(106, 158, 66, 0.2);
}

/* 响应式 - 简洁版垂直箭头 */
@media (max-width: 1200px) {
    .arrow-line-vertical {
        height: 35px;
    }
}

@media (max-width: 992px) {
    .vertical-arrow-wrapper {
        padding: 6px 0;
    }

    .arrow-line-vertical {
        height: 30px;
    }
}

@media (max-width: 768px) {
    .vertical-arrow-wrapper {
        padding: 4px 0;
    }

    .arrow-line-vertical {
        height: 25px;
    }
}

@media (max-width: 480px) {
    .vertical-arrow-wrapper {
        padding: 3px 0;
    }

    .arrow-line-vertical {
        height: 20px;
        width: 1.5px;
    }
}

/* ============================================
   响应式设计 - 改造维保模块
   ============================================ */
@media (max-width: 1200px) {
    .images-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}

@media (max-width: 992px) {
    .before-after-section {
        padding: 24px;
    }

    .images-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .section-group-title h3 {
        font-size: 1.25rem;
    }
}

@media (max-width: 768px) {
    .renovation-showcase {
        gap: 30px;
    }

    .before-after-section {
        padding: 16px;
        border-radius: var(--radius-lg);
    }

    .section-group-title {
        margin-bottom: 16px;
        padding-bottom: 12px;
    }

    .section-group-title .title-icon {
        width: 28px;
        height: 28px;
        font-size: 1rem;
    }

    .section-group-title h3 {
        font-size: 1.1rem;
    }

    .images-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .grid-item {
        aspect-ratio: 1;
        border-radius: var(--radius-md);
    }
}

@media (max-width: 480px) {
    .before-after-section {
        padding: 12px;
    }

    .section-group-title {
        gap: 8px;
        margin-bottom: 12px;
    }

    .section-group-title .title-icon {
        width: 24px;
        height: 24px;
        font-size: 0.85rem;
    }

    .section-group-title h3 {
        font-size: 1rem;
    }

    .images-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .grid-item {
        aspect-ratio: 1;
        min-height: 120px;
    }
}

/* ============================================
   响应式设计 - 新增模块
   ============================================ */
@media (max-width: 1200px) {
    .certificates-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }

    .cert-item.cert-row-1:nth-child(1),
    .cert-item.cert-row-1:nth-child(2),
    .cert-item.cert-row-1:nth-child(3),
    .cert-item.cert-row-2:nth-child(4),
    .cert-item.cert-row-2:nth-child(5),
    .cert-item.cert-row-2:nth-child(6) {
        grid-column: span 2;
    }

    .cert-item.cert-row-3:nth-child(7),
    .cert-item.cert-row-3:nth-child(8),
    .cert-item.cert-row-3:nth-child(9),
    .cert-item.cert-row-3:nth-child(10),
    .cert-item.cert-row-3:nth-child(11),
    .cert-item.cert-row-4:nth-child(12),
    .cert-item.cert-row-4:nth-child(13),
    .cert-item.cert-row-4:nth-child(14),
    .cert-item.cert-row-4:nth-child(15),
    .cert-item.cert-row-4:nth-child(16) {
        grid-column: span 2;
    }

    .cert-item.cert-row-5:nth-child(17) {
        grid-column: 2 / 4;
    }
}

@media (max-width: 992px) {
    .certificates-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    .cert-item.cert-row-1:nth-child(1),
    .cert-item.cert-row-1:nth-child(2),
    .cert-item.cert-row-1:nth-child(3),
    .cert-item.cert-row-2:nth-child(4),
    .cert-item.cert-row-2:nth-child(5),
    .cert-item.cert-row-2:nth-child(6),
    .cert-item.cert-row-3:nth-child(7),
    .cert-item.cert-row-3:nth-child(8),
    .cert-item.cert-row-3:nth-child(9),
    .cert-item.cert-row-3:nth-child(10),
    .cert-item.cert-row-3:nth-child(11),
    .cert-item.cert-row-4:nth-child(12),
    .cert-item.cert-row-4:nth-child(13),
    .cert-item.cert-row-4:nth-child(14),
    .cert-item.cert-row-4:nth-child(15),
    .cert-item.cert-row-4:nth-child(16) {
        grid-column: span 1;
    }

    .cert-item.cert-row-5:nth-child(17) {
        grid-column: 2 / 3;
    }

    .renovation-comparison {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .certificates {
        padding: 60px 0;
    }

    .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        padding: 20px 0;
    }

    .cert-item.cert-row-1:nth-child(1),
    .cert-item.cert-row-1:nth-child(2),
    .cert-item.cert-row-1:nth-child(3),
    .cert-item.cert-row-2:nth-child(4),
    .cert-item.cert-row-2:nth-child(5),
    .cert-item.cert-row-2:nth-child(6),
    .cert-item.cert-row-3:nth-child(7),
    .cert-item.cert-row-3:nth-child(8),
    .cert-item.cert-row-3:nth-child(9),
    .cert-item.cert-row-3:nth-child(10),
    .cert-item.cert-row-3:nth-child(11),
    .cert-item.cert-row-4:nth-child(12),
    .cert-item.cert-row-4:nth-child(13),
    .cert-item.cert-row-4:nth-child(14),
    .cert-item.cert-row-4:nth-child(15),
    .cert-item.cert-row-4:nth-child(16),
    .cert-item.cert-row-5:nth-child(17) {
        grid-column: span 1;
    }

    .renovation {
        padding: 60px 0;
    }

    .renovation-item {
        padding: 16px;
        border-radius: var(--radius-lg);
    }

    .renovation-comparison {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .comparison-label {
        font-size: 0.75rem;
        padding: 4px 10px;
    }

    .footer-qrcode img {
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 480px) {
    .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .cert-item {
        border-radius: var(--radius-md);
    }

    .cert-item img {
        max-height: 150px;
    }

    .renovation-item {
        padding: 12px;
    }

    .comparison-label {
        font-size: 0.7rem;
        padding: 4px 8px;
    }

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

    .footer-qrcode {
        text-align: center;
    }

    .footer-qrcode img {
        width: 120px;
        height: 120px;
    }
}

/* ============================================
   打印样式
   ============================================ */
@media print {

    .header,
    .hero-visual,
    .scroll-indicator,
    .btn,
    .modal {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .section {
        padding: 40px 0;
    }

    .hero-text {
        color: black;
    }
}