/* ========================================
   量佳汽车贴膜 - 官方电子质保系统
   样式表 - 重构优化版本
   保持原有布局和视觉效果
   ======================================== */

/* ===== 基础样式和变量 ===== */
:root {
    /* 主色调 - 科技蓝 */
    --primary-color: #00d4ff;
    --primary-light: #33ddff;
    --primary-dark: #0099cc;

    /* 次要色 - 深空蓝 */
    --secondary-color: #0099ff;
    --secondary-light: #33adff;

    /* 强调色 - 紫罗兰 */
    --accent-color: #a855f7;
    --accent-light: #c084fc;

    /* 背景色 */
    --bg-dark: #0a0e27;
    --bg-darker: #050815;
    --bg-card: rgba(255, 255, 255, 0.03);

    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;

    /* 状态颜色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;

    /* 渐变 - 高端科技感 */
    --gradient-1: linear-gradient(135deg, #00d4ff 0%, #0099ff 100%);
    --gradient-2: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
    --gradient-3: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    --gradient-hero: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(168, 85, 247, 0.1) 100%);
    --gradient-glow: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.3), transparent);

    /* 玻璃态效果 */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-bg-strong: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-strong: rgba(255, 255, 255, 0.2);

    /* 阴影 - 多层次立体感 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-glow-strong: 0 0 40px rgba(0, 212, 255, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-darker);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
    position: relative;
}

/* 网格背景 - 科技感 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -2;
    pointer-events: none;
}

html {
    scroll-behavior: smooth;
}

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

/* ===== 可访问性辅助样式 ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ===== 动画样式 ===== */
@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    50% {
        transform: translateY(-100px) translateX(var(--random-x, 0));
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 100px;
    right: 30px;
    padding: 16px 24px;
    background: rgba(5, 8, 21, 0.95);
    border-radius: 12px;
    color: white;
    font-size: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    z-index: 10000;
    animation: slideInRight 0.3s ease-out;
    backdrop-filter: blur(20px);
}

.notification-success {
    border: 2px solid #10b981;
}

.notification-error {
    border: 2px solid #ef4444;
}

.notification-info {
    border: 2px solid #00d4ff;
}

/* ===== 粒子背景 - 增强版 ===== */
.particles-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(ellipse at top, #0a0e27 0%, #050815 100%);
}

.particles-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(168, 85, 247, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 90%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
    animation: pulseGlow 8s ease-in-out infinite;
}

.particles-bg::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.05) 1px, transparent 1px);
    background-size: 100px 100px;
    animation: rotateBackground 60s linear infinite;
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

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

/* ===== 导航栏 - 高端玻璃态 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    backdrop-filter: blur(20px) saturate(180%);
    background: rgba(5, 8, 21, 0.7);
    border-bottom: 1px solid var(--glass-border-strong);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4),
                0 0 0 1px rgba(0, 212, 255, 0.1) inset;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(5, 8, 21, 0.95);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6),
                0 0 0 1px rgba(0, 212, 255, 0.2) inset,
                var(--shadow-glow);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: bold;
    position: relative;
}

.logo::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 30px;
    background: var(--gradient-1);
    border-radius: 4px;
    box-shadow: var(--shadow-glow);
}

.logo-icon {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 28px;
    font-weight: 900;
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
    animation: logoGlow 3s ease-in-out infinite;
}

@keyframes logoGlow {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.3); }
}

.logo-text {
    color: var(--text-primary);
    font-size: 18px;
    letter-spacing: 3px;
    font-weight: 700;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: 8px 0;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-menu li a:hover {
    color: var(--primary-color);
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ===== Hero Section - 极致视觉冲击 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 20px 60px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 72px;
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.1;
    letter-spacing: -1px;
}

.text-gradient {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    position: relative;
    animation: textShine 3s ease-in-out infinite;
}

@keyframes textShine {
    0%, 100% {
        filter: brightness(1) drop-shadow(0 0 20px rgba(0, 212, 255, 0.3));
    }
    50% {
        filter: brightness(1.2) drop-shadow(0 0 40px rgba(0, 212, 255, 0.6));
    }
}

.hero-subtitle {
    font-size: 24px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 50px;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.feature-icon {
    font-size: 40px;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 48px;
    background: var(--gradient-1);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.4),
                0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transition: width 0.6s, height 0.6s;
}

.cta-button:hover::before {
    width: 300px;
    height: 300px;
}

.cta-button:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.6),
                0 0 0 1px rgba(255, 255, 255, 0.2) inset,
                var(--shadow-glow-strong);
}

.hero-visual {
    position: absolute;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    width: 400px;
    height: 400px;
}

.floating-card {
    width: 100%;
    height: 100%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    backdrop-filter: blur(20px);
    position: relative;
    animation: float 6s ease-in-out infinite;
}

.card-glow {
    position: absolute;
    inset: -2px;
    background: var(--gradient-1);
    border-radius: 30px;
    opacity: 0.5;
    filter: blur(20px);
    z-index: -1;
    animation: glow 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

@keyframes glow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

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

/* ===== Section 通用样式 ===== */
section {
    padding: 100px 20px;
    position: relative;
}

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

.section-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-1);
    border-radius: 2px;
    box-shadow: var(--shadow-glow);
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

/* ===== 电子质保查询 ===== */
.warranty-section {
    background: radial-gradient(circle at center, rgba(0, 212, 255, 0.05) 0%, transparent 70%);
}

.warranty-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border-strong);
    border-radius: 30px;
    padding: 50px;
    backdrop-filter: blur(30px) saturate(180%);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg),
                0 0 0 1px rgba(0, 212, 255, 0.1) inset;
}

.warranty-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(
        transparent,
        rgba(0, 212, 255, 0.1),
        transparent 30%
    );
    animation: borderRotate 4s linear infinite;
}

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

.warranty-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    opacity: 0.05;
    z-index: 0;
}

.warranty-input-group {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    position: relative;
    z-index: 1;
}

.warranty-input {
    flex: 1;
    padding: 18px 25px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--glass-border);
    border-radius: 15px;
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
}

.warranty-input:focus {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.warranty-input::placeholder {
    color: var(--text-secondary);
}

.search-button {
    padding: 18px 40px;
    background: var(--gradient-1);
    border: none;
    border-radius: 15px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
}

.search-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
}

.warranty-result {
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.5s ease-out;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--glass-border);
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success-color);
    border-radius: 50px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

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

.warranty-id {
    font-size: 14px;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

/* 结果项定义列表样式优化 */
.result-grid dt,
.result-grid dd {
    margin: 0;
}

.result-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.result-item:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

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

.result-value {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.result-value.highlight {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 24px;
}

.demo-codes {
    text-align: center;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
    position: relative;
    z-index: 1;
}

.demo-codes p {
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.demo-code-list {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.demo-code {
    padding: 10px 20px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
    cursor: pointer;
    transition: all 0.3s ease;
}

.demo-code:hover {
    background: rgba(0, 212, 255, 0.2);
    transform: translateY(-2px);
}

/* ===== 产品中心 ===== */
.products-section {
    background: radial-gradient(circle at center, rgba(168, 85, 247, 0.05) 0%, transparent 70%);
}

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

.product-card {
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border);
    border-radius: 25px;
    padding: 40px;
    backdrop-filter: blur(30px) saturate(180%);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.product-card:nth-child(2)::before {
    background: var(--gradient-2);
}

.product-card:nth-child(3)::before {
    background: var(--gradient-3);
}

.product-card:hover {
    transform: translateY(-15px) scale(1.02);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl),
                var(--shadow-glow-strong),
                0 0 0 1px rgba(0, 212, 255, 0.2) inset;
}

.product-card:hover::before {
    opacity: 0.08;
}

.product-icon {
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
}

.product-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
}

.product-card > p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

.product-features {
    list-style: none;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.product-features li {
    padding: 8px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 25px;
}

.product-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.product-badge {
    display: inline-block;
    padding: 6px 15px;
    background: var(--gradient-1);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.product-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.product-card-link:hover {
    text-decoration: none;
    color: inherit;
}

/* ===== 关于我们 ===== */
.about-section {
    background: radial-gradient(circle at center, rgba(16, 185, 129, 0.05) 0%, transparent 70%);
}

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

.about-text {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

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

.about-visual {
    position: relative;
}

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

.tech-item {
    padding: 30px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    text-align: center;
    font-weight: 600;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.tech-item:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary-color);
    transform: scale(1.05);
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.contact-card {
    text-align: center;
    padding: 40px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 25px;
    backdrop-filter: blur(20px);
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
}

.contact-card-link {
    text-decoration: none;
    display: block;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.contact-card-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.contact-card-link:hover {
    transform: translateY(-10px) scale(1.03);
    border-color: var(--primary-color);
    box-shadow: 0 15px 50px rgba(0, 212, 255, 0.4),
                var(--shadow-glow);
}

.contact-card-link:hover::before {
    opacity: 0.1;
}

.contact-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.contact-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
}

.contact-card p {
    font-size: 18px;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 10px;
}

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

/* ===== 页脚 ===== */
.footer {
    padding: 40px 20px;
    background: rgba(5, 8, 21, 0.8);
    border-top: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

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

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

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

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }

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

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

@media (max-width: 768px) {
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(5, 8, 21, 0.98);
        flex-direction: column;
        gap: 0;
        padding: 20px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-menu li {
        padding: 15px 0;
        border-bottom: 1px solid var(--glass-border);
    }

    .menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 48px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-features {
        flex-direction: column;
        gap: 20px;
    }

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

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

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

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

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

    .warranty-card {
        padding: 30px 20px;
    }

    .warranty-input-group {
        flex-direction: column;
    }

    .demo-code-list {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 36px;
    }

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

    .cta-button {
        padding: 14px 30px;
        font-size: 16px;
    }
}

/* ===== 官方认证标识 ===== */
.official-certification {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--glass-border);
    display: flex;
    align-items: center;
    gap: 30px;
}

/* 公章样式 */
.certification-seal {
    flex-shrink: 0;
}

.seal-circle {
    width: 120px;
    height: 120px;
    border: 3px solid #d32f2f;
    border-radius: 50%;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle, rgba(211, 47, 47, 0.05) 0%, transparent 70%);
    animation: sealGlow 3s ease-in-out infinite;
}

@keyframes sealGlow {
    0%, 100% {
        box-shadow: 0 0 10px rgba(211, 47, 47, 0.3),
                    inset 0 0 10px rgba(211, 47, 47, 0.1);
    }
    50% {
        box-shadow: 0 0 20px rgba(211, 47, 47, 0.5),
                    inset 0 0 15px rgba(211, 47, 47, 0.2);
    }
}

.seal-star {
    position: absolute;
    top: 15px;
    font-size: 20px;
    color: #d32f2f;
    font-weight: bold;
}

.seal-text-top {
    font-size: 11px;
    font-weight: bold;
    color: #d32f2f;
    letter-spacing: 2px;
    margin-top: 8px;
}

.seal-text-center {
    font-size: 14px;
    font-weight: bold;
    color: #d32f2f;
    margin: 5px 0;
    letter-spacing: 1px;
}

.seal-text-bottom {
    font-size: 11px;
    font-weight: bold;
    color: #d32f2f;
    letter-spacing: 2px;
}

/* 认证信息 */
.certification-info {
    flex: 1;
}

.cert-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--success-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.cert-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 12px;
}

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

.cert-date span {
    color: var(--primary-color);
    font-weight: 600;
}

/* 响应式 - 认证标识 */
@media (max-width: 768px) {
    .official-certification {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .seal-circle {
        margin: 0 auto;
    }
}

/* ===== 报价查询系统 ===== */
.pricing-section {
    padding: 100px 20px;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    position: relative;
}

.pricing-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 30% 20%, rgba(0, 212, 255, 0.12) 0%, transparent 60%),
        radial-gradient(circle at 70% 80%, rgba(168, 85, 247, 0.12) 0%, transparent 60%);
    animation: pulseGlow 8s ease-in-out infinite;
    pointer-events: none;
}

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

.pricing-selectors {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 50px;
    padding: 40px;
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border-strong);
    border-radius: 25px;
    backdrop-filter: blur(30px) saturate(180%);
    box-shadow: var(--shadow-lg),
                0 0 0 1px rgba(0, 212, 255, 0.1) inset;
    position: relative;
    overflow: hidden;
}

.pricing-selectors::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(
        transparent,
        rgba(0, 212, 255, 0.08),
        transparent 30%
    );
    animation: borderRotate 6s linear infinite;
    pointer-events: none;
}

.selector-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
    position: relative;
    z-index: 1;
}

.selector-group label {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.selector-group select {
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.selector-group select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.selector-group select:not(:disabled):hover {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.15);
}

.selector-group select:focus {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.15),
                0 0 20px rgba(0, 212, 255, 0.2);
    transform: translateY(-2px);
}

.selector-group select option {
    background: #1a1d2e;
    color: #ffffff;
    padding: 10px;
}

.selector-group select option:checked {
    background: var(--primary-color);
    color: #ffffff;
}

.car-interactive {
    position: relative;
    min-height: 500px;
}

/* 膜类型选择区域 */
.film-type-selection {
    max-width: 900px;
    margin: 0 auto 40px;
    text-align: center;
}

.selection-hint {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.film-type-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.film-type-btn {
    position: relative;
    background: var(--glass-bg-strong);
    border: 2px solid var(--glass-border-strong);
    border-radius: 20px;
    padding: 40px 25px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px) saturate(180%);
    overflow: hidden;
    box-shadow: var(--shadow-md),
                0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.film-type-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 0;
}

.film-type-btn:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--primary-color);
    box-shadow: 0 15px 50px rgba(0, 212, 255, 0.4),
                0 0 0 1px rgba(0, 212, 255, 0.2) inset,
                var(--shadow-glow);
}

.film-type-btn:hover::before {
    opacity: 0.12;
}

.film-type-btn.active {
    border-color: var(--primary-color);
    background: rgba(0, 212, 255, 0.15);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.5),
                0 0 0 2px rgba(0, 212, 255, 0.3) inset,
                var(--shadow-glow-strong);
    transform: scale(1.03);
}

.film-type-btn.active::before {
    opacity: 0.2;
}

.film-type-icon {
    font-size: 56px;
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.3));
    transition: all 0.3s ease;
}

.film-type-btn:hover .film-type-icon {
    filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.6));
    transform: scale(1.1);
}

.film-type-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    position: relative;
    z-index: 1;
    letter-spacing: 0.5px;
}

.film-type-desc {
    font-size: 14px;
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
}

.film-type-btn:active {
    transform: translateY(-2px);
}

.price-display {
    max-width: 500px;
    margin: 40px auto 0;
    animation: fadeInUp 0.4s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.price-card {
    background: var(--glass-bg-strong);
    border: 2px solid var(--primary-color);
    border-radius: 25px;
    padding: 40px;
    backdrop-filter: blur(30px) saturate(180%);
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.4),
                0 0 0 1px rgba(0, 212, 255, 0.2) inset,
                var(--shadow-glow-strong);
    position: relative;
    overflow: hidden;
}

.price-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(
        transparent,
        rgba(0, 212, 255, 0.15),
        transparent 30%
    );
    animation: borderRotate 5s linear infinite;
    pointer-events: none;
}

.price-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 25px;
    border-bottom: 1px solid var(--glass-border-strong);
    position: relative;
    z-index: 1;
}

.price-header h3 {
    font-size: 26px;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.price-badge {
    padding: 8px 20px;
    background: var(--gradient-1);
    border-radius: 25px;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4),
                0 0 0 1px rgba(255, 255, 255, 0.2) inset;
    letter-spacing: 0.5px;
}

.price-details {
    display: flex;
    flex-direction: column;
    gap: 25px;
    position: relative;
    z-index: 1;
}

.vehicle-info p {
    margin: 10px 0;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
}

.vehicle-info strong {
    color: var(--text-primary);
    font-weight: 600;
}

.vehicle-info span {
    color: var(--primary-color);
    font-weight: 600;
}

.price-amount {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
    background: rgba(0, 212, 255, 0.12);
    border-radius: 20px;
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.3),
                0 0 0 1px rgba(0, 212, 255, 0.2) inset;
}

.price-label {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.price-value {
    font-size: 48px;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.5));
    animation: priceGlow 2s ease-in-out infinite;
    letter-spacing: -1px;
}

@keyframes priceGlow {
    0%, 100% {
        filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.4));
    }
    50% {
        filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.7));
    }
}

.price-note {
    margin-top: 15px;
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    font-style: italic;
}

.no-price-message {
    text-align: center;
    padding: 50px;
    background: var(--glass-bg-strong);
    border: 2px dashed var(--glass-border-strong);
    border-radius: 25px;
    max-width: 450px;
    margin: 40px auto 0;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
}

.message-icon {
    font-size: 56px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 15px rgba(0, 212, 255, 0.3));
}

.no-price-message p {
    margin: 12px 0;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

.message-hint {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* 响应式 - 报价查询 */
@media (max-width: 768px) {
    .pricing-selectors {
        grid-template-columns: 1fr;
        padding: 20px;
    }

    .car-illustration {
        padding: 0 20px;
    }

    .label {
        font-size: 11px;
        padding: 6px 12px;
    }

    .front-label {
        left: 50%;
        top: 3%;
    }

    .side-label {
        left: 15%;
        top: 20%;
    }

    .price-header h3 {
        font-size: 20px;
    }

    .price-value {
        font-size: 32px;
    }
}

/* SVG车辆玻璃区域样式 */
.car-glass {
    transition: all 0.4s ease;
    cursor: pointer;
}

.car-glass:hover {
    opacity: 0.9;
    filter: brightness(1.4) url(#glow) !important;
}

.car-glass:active {
    transform: scale(0.98);
}

/* SVG车辆图片自适应 */
.car-image {
    width: 100%;
    height: auto;
    display: block;
    max-height: 500px;
}