/* ============================================
   无锡清肯科技有限公司 - 官方网站样式
   设计风格：商务大气，蓝色调为主，桔色绿色辅助
   ============================================ */

/* CSS 变量定义 */
:root {
    /* 主色调 - 商务深蓝系 */
    --color-navy: #0A1F44;
    --color-navy-light: #1E3A8A;
    --color-blue: #1E40AF;
    --color-blue-bright: #3B82F6;
    --color-blue-light: #60A5FA;
    --color-blue-pale: #DBEAFE;
    
    /* 辅助色 - 橙色 */
    --color-orange: #F97316;
    --color-orange-light: #FB923C;
    --color-orange-pale: #FFEDD5;
    
    /* 辅助色 - 绿色 */
    --color-green: #10B981;
    --color-green-light: #34D399;
    --color-green-pale: #D1FAE5;
    
    /* 中性色 */
    --color-white: #FFFFFF;
    --color-bg: #F8FAFC;
    --color-bg-alt: #F1F5F9;
    --color-border: #E2E8F0;
    --color-text: #0F172A;
    --color-text-secondary: #475569;
    --color-text-muted: #94A3B8;
    
    /* 渐变 */
    --gradient-navy: linear-gradient(135deg, #0A1F44 0%, #1E3A8A 100%);
    --gradient-blue: linear-gradient(135deg, #1E40AF 0%, #3B82F6 100%);
    --gradient-orange: linear-gradient(135deg, #F97316 0%, #FB923C 100%);
    --gradient-green: linear-gradient(135deg, #10B981 0%, #34D399 100%);
    --gradient-text: linear-gradient(135deg, #60A5FA 0%, #3B82F6 50%, #FB923C 100%);
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
    --shadow-xl: 0 24px 48px rgba(15, 23, 42, 0.16);
    --shadow-blue: 0 12px 32px rgba(30, 64, 175, 0.24);
    --shadow-orange: 0 12px 32px rgba(249, 115, 22, 0.24);
    
    /* 间距 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 容器 */
    --container-max: 1200px;
}

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

html {
    scroll-padding-top: 80px;
    -webkit-text-size-adjust: 100%;
    overflow: hidden;
    width: 100%;
    height: 100%;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-white);
    overflow: hidden;
    width: 100%;
    height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.page-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior-x: none;
}

/* 防止 Lucide 图标加载闪烁 */
i[class*="icon-"] {
    opacity: 0;
    transition: opacity 0.1s;
}

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

ul, ol {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

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

/* 通用板块 */
.section {
    padding: 100px 0;
    position: relative;
}

.section:nth-child(even) {
    background: var(--color-bg);
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-blue-bright);
    background: var(--color-blue-pale);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    margin-bottom: 20px;
}

.section-title {
    font-size: 40px;
    font-weight: 900;
    color: var(--color-navy);
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 17px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-blue);
    color: var(--color-white);
    box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(30, 64, 175, 0.32);
}

.btn.loading {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn.loading .icon-loader-2 {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.btn-cta {
    background: var(--gradient-orange);
    color: var(--color-white);
    box-shadow: var(--shadow-orange);
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(249, 115, 22, 0.32);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 36px;
    font-size: 17px;
}

.btn-block {
    width: 100%;
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 31, 68, 0.4);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.logo-icon {
    display: flex;
    align-items: center;
    filter: drop-shadow(0 4px 12px rgba(30, 64, 175, 0.3));
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-name {
    font-size: 18px;
    font-weight: 900;
    color: var(--color-white);
    transition: var(--transition);
}

.logo-en {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-blue-light);
    transition: var(--transition);
}

.navbar.scrolled .logo-name {
    color: var(--color-navy);
}

.navbar.scrolled .logo-en {
    color: var(--color-blue);
}

.nav-menu {
    display: flex;
    gap: 4px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    border-radius: var(--radius-md);
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-orange);
    border-radius: 2px;
    transition: var(--transition);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 20px;
}

.navbar.scrolled .nav-link {
    color: var(--color-text-secondary);
}

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
    color: var(--color-navy);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-cta {
    padding: 10px 20px;
    font-size: 14px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: var(--transition);
}

.navbar.scrolled .nav-toggle span {
    background: var(--color-navy);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================
   Hero 区
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    background: var(--gradient-navy);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 120px 0 0;
    transform: translateZ(0);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
    transform: translateZ(0);
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(59, 130, 246, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
}

.hero-glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-blue-bright), transparent);
    top: -200px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.hero-glow-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-orange), transparent);
    bottom: -150px;
    left: -100px;
    opacity: 0.2;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { margin-top: 0; margin-left: 0; }
    50% { margin-top: -40px; margin-left: 40px; }
}

.hero-container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    flex: 1;
    padding-top: 40px;
    padding-bottom: 40px;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-blue-light);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-green-light);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--color-green-light);
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: 56px;
    font-weight: 900;
    line-height: 1.15;
    color: var(--color-white);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.hero-subtitle {
    font-size: 17px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 36px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero-tags {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-tag {
    padding: 6px 14px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
}

/* Hero 可视化卡片 */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.visual-card {
    width: 100%;
    max-width: 480px;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(0, 0, 0, 0.2);
}

.card-dots {
    display: flex;
    gap: 6px;
}

.card-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
}

.card-dots span:nth-child(1) { background: #FF5F57; }
.card-dots span:nth-child(2) { background: #FFBD2E; }
.card-dots span:nth-child(3) { background: #28CA42; }

.card-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.card-body {
    padding: 24px 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    line-height: 1.9;
}

.code-line {
    color: rgba(255, 255, 255, 0.7);
}

.code-line.indent {
    padding-left: 24px;
}

.code-line.comment {
    color: rgba(255, 255, 255, 0.35);
    font-style: italic;
}

.code-key { color: #C084FC; }
.code-var { color: #60A5FA; }
.code-fn { color: #34D399; }
.code-string { color: #FB923C; }
.code-prop { color: #FBBF24; }

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(0, 0, 0, 0.2);
    font-size: 12px;
}

.footer-stat {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.7);
}

.stat-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.stat-dot.green {
    background: var(--color-green-light);
    box-shadow: 0 0 8px var(--color-green-light);
}

.footer-time {
    color: rgba(255, 255, 255, 0.4);
    font-family: 'JetBrains Mono', monospace;
}

/* 浮动徽章 */
.floating-badge {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: floatBadge 4s ease-in-out infinite;
}

.floating-badge i {
    font-size: 24px;
}

.floating-badge strong {
    display: block;
    font-size: 14px;
    color: var(--color-navy);
}

.floating-badge span {
    font-size: 12px;
    color: var(--color-text-muted);
}

.floating-badge-1 {
    top: 20%;
    left: -20px;
    animation-delay: 0s;
}

.floating-badge-1 i {
    color: var(--color-green);
}

.floating-badge-2 {
    bottom: 15%;
    right: -20px;
    animation-delay: 2s;
}

.floating-badge-2 i {
    color: var(--color-orange);
}

@keyframes floatBadge {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* 数据统计 */
.stats-container {
    position: relative;
    z-index: 1;
    padding-bottom: 80px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
}

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

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
}

.stat-number {
    font-size: 40px;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-prefix {
    font-size: 20px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.6);
    -webkit-text-fill-color: rgba(255, 255, 255, 0.6);
}

.stat-suffix {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-orange-light);
    -webkit-text-fill-color: var(--color-orange-light);
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   关于我们
   ============================================ */
.about-content {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 64px;
    margin-bottom: 80px;
    align-items: start;
}

.about-heading {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 24px;
    line-height: 1.3;
}

.about-paragraph {
    font-size: 16px;
    line-height: 1.9;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.about-paragraph strong {
    color: var(--color-navy);
    font-weight: 700;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 32px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.about-feature:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-blue-bright);
}

.feature-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.feature-icon.blue {
    background: var(--color-blue-pale);
    color: var(--color-blue);
}

.feature-icon.orange {
    background: var(--color-orange-pale);
    color: var(--color-orange);
}

.feature-icon.green {
    background: var(--color-green-pale);
    color: var(--color-green);
}

.about-feature h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 2px;
}

.about-feature p {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* 愿景卡片 */
.about-visual {
    position: sticky;
    top: 100px;
}

.vision-card {
    background: var(--gradient-navy);
    border-radius: var(--radius-lg);
    padding: 36px;
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.vision-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3), transparent);
    border-radius: 50%;
}

.vision-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    position: relative;
}

.vision-header i {
    font-size: 24px;
    color: var(--color-orange-light);
}

.vision-header h3 {
    font-size: 20px;
    font-weight: 700;
}

.vision-card p {
    font-size: 15px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 24px;
    position: relative;
}

.vision-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 28px 0;
}

.vision-list {
    position: relative;
}

.vision-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.85);
}

.check-icon {
    width: 22px;
    height: 22px;
    background: var(--gradient-green);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* 发展历程时间轴 */
.timeline {
    margin-top: 80px;
}

.timeline-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-navy);
    text-align: center;
    margin-bottom: 48px;
}

.timeline-track {
    position: relative;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
    padding: 24px 0;
}

.timeline-line {
    position: absolute;
    top: 60px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-blue-bright), var(--color-orange), var(--color-green));
}

.timeline-item {
    text-align: center;
    position: relative;
}

.timeline-dot {
    width: 16px;
    height: 16px;
    background: var(--color-white);
    border: 3px solid var(--color-blue-bright);
    border-radius: 50%;
    margin: 0 auto 16px;
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.3);
    border-color: var(--color-orange);
    box-shadow: 0 0 0 6px rgba(249, 115, 22, 0.15);
}

.timeline-year {
    font-size: 24px;
    font-weight: 900;
    color: var(--color-navy);
    margin-bottom: 8px;
}

.timeline-content {
    font-size: 13px;
    line-height: 1.6;
    color: var(--color-text-secondary);
    padding: 0 8px;
}

/* ============================================
   核心服务
   ============================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-blue);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

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

.service-card-featured {
    border-color: var(--color-orange);
    box-shadow: var(--shadow-orange);
    transform: translateY(-16px);
}

.service-card-featured::before {
    background: var(--gradient-orange);
    transform: scaleX(1);
}

.service-card-featured:hover {
    transform: translateY(-24px);
}

.featured-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 700;
    color: var(--color-white);
    background: var(--gradient-orange);
    border-radius: var(--radius-full);
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    margin-bottom: 24px;
}

.service-icon-blue {
    background: var(--color-blue-pale);
    color: var(--color-blue);
}

.service-icon-orange {
    background: var(--color-orange-pale);
    color: var(--color-orange);
}

.service-icon-green {
    background: var(--color-green-pale);
    color: var(--color-green);
}

.service-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 12px;
}

.service-desc {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.service-features {
    margin-bottom: 28px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--color-text);
}

.bullet {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.bullet.blue { background: var(--color-blue-bright); }
.bullet.orange { background: var(--color-orange); }
.bullet.green { background: var(--color-green); }

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-blue);
    transition: var(--transition);
}

.service-link:hover {
    gap: 12px;
    color: var(--color-orange);
}

/* ============================================
   产品案例
   ============================================ */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.case-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.case-header {
    padding: 32px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    overflow: hidden;
}

.case-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    opacity: 0.15;
}

.case-header-blue {
    background: var(--gradient-navy);
    color: var(--color-white);
}

.case-header-blue::before {
    background: var(--color-blue-bright);
}

.case-header-orange {
    background: var(--gradient-orange);
    color: var(--color-white);
}

.case-header-orange::before {
    background: var(--color-white);
}

.case-header-green {
    background: var(--gradient-green);
    color: var(--color-white);
}

.case-header-green::before {
    background: var(--color-white);
}

.case-logo {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    position: relative;
    z-index: 1;
}

.case-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    position: relative;
    z-index: 1;
}

.case-industry {
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
}

.case-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.85);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--color-green-light);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-green-light);
    animation: pulse 2s infinite;
}

.case-body {
    padding: 28px 32px;
    flex: 1;
}

.case-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 12px;
}

.case-desc {
    font-size: 14px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.case-tag {
    font-size: 12px;
    padding: 4px 10px;
    background: var(--color-bg-alt);
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
}

.case-stats {
    display: flex;
    gap: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}

.case-stat {
    display: flex;
    flex-direction: column;
}

.case-stat strong {
    font-size: 18px;
    font-weight: 900;
    color: var(--color-navy);
    line-height: 1;
}

.case-stat span {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.case-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 32px;
    background: var(--color-bg-alt);
    color: var(--color-navy);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.case-link:hover {
    background: var(--color-navy);
    color: var(--color-white);
    padding-left: 36px;
    padding-right: 28px;
}

.case-link i {
    font-size: 16px;
}

/* ============================================
   研发实力
   ============================================ */
.capabilities-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    margin-bottom: 80px;
}

.capabilities-subtitle {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 12px;
}

.capabilities-desc {
    font-size: 15px;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
    line-height: 1.7;
}

.tech-categories {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.tech-category {
    padding: 24px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.tech-category:hover {
    border-color: var(--color-blue-bright);
    box-shadow: var(--shadow-md);
}

.tech-cat-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-blue-pale);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tag {
    font-size: 13px;
    padding: 6px 12px;
    background: var(--color-bg-alt);
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', monospace;
    transition: var(--transition);
    cursor: default;
}

.tech-tag:hover {
    background: var(--color-blue);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* 优势列表 */
.advantage-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.advantage-item {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient-blue);
    transform: scaleY(0);
    transition: var(--transition);
    transform-origin: bottom;
}

.advantage-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.advantage-item:hover::before {
    transform: scaleY(1);
}

.advantage-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--gradient-blue);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.advantage-content h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 6px;
}

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

/* 服务流程 */
.process {
    margin-top: 40px;
}

.process-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-navy);
    text-align: center;
    margin-bottom: 48px;
}

.process-track {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
    position: relative;
}

.process-step {
    text-align: center;
    position: relative;
    padding: 24px 16px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.process-step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-blue-bright);
}

.step-number {
    font-size: 12px;
    font-weight: 900;
    color: var(--color-blue-bright);
    font-family: 'JetBrains Mono', monospace;
    margin-bottom: 12px;
}

.step-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    background: var(--color-blue-pale);
    color: var(--color-blue);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    transition: var(--transition);
}

.process-step:hover .step-icon {
    background: var(--gradient-blue);
    color: var(--color-white);
    transform: rotate(-8deg) scale(1.1);
}

.step-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 6px;
}

.step-desc {
    font-size: 12px;
    line-height: 1.5;
    color: var(--color-text-muted);
}

/* ============================================
   服务客户 — 横向滚动Logo墙
   ============================================ */
.clients {
    background: var(--color-white);
    overflow: hidden;
}

.clients-wall {
    position: relative;
}

.clients-wall::before,
.clients-wall::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 100px;
    z-index: 2;
    pointer-events: none;
}

.clients-wall::before {
    left: 0;
    background: linear-gradient(to right, var(--color-white), transparent);
}

.clients-wall::after {
    right: 0;
    background: linear-gradient(to left, var(--color-white), transparent);
}

.clients-row {
    overflow: hidden;
    margin: 0 -16px;
    padding: 8px 0;
}

.clients-track {
    display: flex;
    gap: 20px;
    width: max-content;
    animation: scrollClients 30s linear infinite;
}

.clients-track:hover {
    animation-play-state: paused;
}

@keyframes scrollClients {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.client-badge {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 28px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 60px;
    white-space: nowrap;
    transition: var(--transition);
    cursor: default;
    flex-shrink: 0;
}

.client-badge:hover {
    border-color: var(--color-blue);
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.1);
    transform: translateY(-2px);
}

.badge-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-blue);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.badge-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-navy);
}

.badge-tag {
    font-size: 12px;
    padding: 2px 10px;
    border-radius: 20px;
    background: var(--color-blue-pale);
    color: var(--color-blue);
    font-weight: 500;
}

/* ============================================
   联系我们
   ============================================ */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: stretch;
}

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

.contact-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.contact-card-header {
    padding: 28px 32px;
    background: var(--gradient-navy);
    color: var(--color-white);
}

.contact-card-header h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
}

.contact-card-header p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.contact-items {
    padding: 28px 32px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    flex: 1;
}

.contact-item {
    display: flex;
    gap: 14px;
}

.contact-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--color-blue-pale);
    color: var(--color-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.contact-detail h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 4px;
}

.contact-detail p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.contact-phone {
    color: var(--color-orange);
    font-weight: 600;
}

.contact-phone:hover {
    color: var(--color-orange-light);
}

.contact-card-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 24px 32px;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.contact-card-cta .cta-content h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 2px;
}

.contact-card-cta .cta-content p {
    font-size: 13px;
    color: var(--color-text-muted);
}

.contact-card-cta .btn {
    white-space: nowrap;
}

/* 联系表单 */
.contact-form-wrap {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 4px;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.required {
    color: var(--color-orange);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    font-size: 15px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    transition: var(--transition);
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-blue-bright);
    background: var(--color-white);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

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

.form-note {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--color-text-muted);
    text-align: center;
    justify-content: center;
    margin-top: 8px;
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--color-navy);
    color: rgba(255, 255, 255, 0.7);
    padding: 80px 0 32px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-blue-bright), var(--color-orange), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 64px;
    margin-bottom: 48px;
}

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

.footer-logo-text {
    display: flex;
    flex-direction: column;
}

.footer-name {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-white);
}

.footer-en {
    font-size: 11px;
    color: var(--color-blue-light);
    letter-spacing: 1px;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.55);
    max-width: 400px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1.5fr;
    gap: 32px;
}

.footer-col-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 20px;
}

.footer-col a {
    display: block;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 12px;
    line-height: 1.6;
    transition: var(--transition);
}

.footer-col p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.6;
}

.footer-col a:hover {
    color: var(--color-orange-light);
    transform: translateX(4px);
}

.footer-contact {
    margin-bottom: 10px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.6;
}

.contact-link {
    color: rgba(255, 255, 255, 0.55);
    transition: var(--transition);
    white-space: nowrap;
}

.contact-link:hover {
    color: var(--color-orange-light);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 12px;
    color: rgba(255, 255, 255, 0.35);
}

.footer-cpr {
    margin: 0;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.35);
}

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

.b-link {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.35);
    transition: color 0.2s;
    white-space: nowrap;
}

.b-link:hover {
    color: var(--color-blue-light);
}

.b-sep {
    color: rgba(255, 255, 255, 0.12);
    font-size: 12px;
}

.b-gwab {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.b-icon {
    width: 14px;
    height: 14px;
    display: inline !important;
    vertical-align: middle;
}

/* ============================================
   弹窗
   ============================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 31, 68, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.modal {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    max-width: 440px;
    width: 90%;
    text-align: center;
    transform: scale(0.9);
    transition: var(--transition);
    box-shadow: var(--shadow-xl);
}

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

.modal-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--gradient-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--color-white);
    box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
}

.modal-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 12px;
}

.modal-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.modal-phone {
    margin-bottom: 16px;
}

.modal-close {
    padding: 10px 24px;
    font-size: 14px;
    color: var(--color-text-muted);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

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

/* ============================================
   返回顶部
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--gradient-blue);
    color: var(--color-white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-blue);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(30, 64, 175, 0.4);
}

/* ============================================
   动画
   ============================================ */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

/* 滚动触发动画（IntersectionObserver） */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   图标处理（Lucide SVG）
   ============================================ */
[class^="icon-"],
[class*=" icon-"] {
    width: 1em;
    height: 1em;
    display: inline-block;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    flex-shrink: 0;
}

/* ============================================
   响应式 - 平板
   ============================================ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .hero-visual {
        max-width: 480px;
        margin: 0 auto;
    }
    
    .hero-title {
        font-size: 44px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .stat-item:nth-child(2)::after {
        display: none;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .about-visual {
        position: static;
    }
    
    .timeline-track {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .timeline-line {
        display: none;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .service-card-featured {
        transform: translateY(0);
    }
    
    .service-card-featured:hover {
        transform: translateY(-8px);
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .capabilities-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .process-track {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   响应式 - 移动端
   ============================================ */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: var(--transition);
        max-height: calc(100vh - 72px);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        transform: translateY(0);
    }
    
    .nav-link {
        color: var(--color-text);
        padding: 14px 16px;
        border-radius: var(--radius-md);
    }
    
    .nav-link:hover,
    .nav-link.active {
        background: var(--color-blue-pale);
        color: var(--color-blue);
    }
    
    .nav-link::after {
        display: none;
    }
    
    .nav-cta {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .navbar {
        background: rgba(10, 31, 68, 0.95);
    }
    
    .navbar.scrolled {
        background: rgba(255, 255, 255, 0.98);
    }
    
    .hero {
        padding: 100px 0 0;
        min-height: auto;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 15px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .floating-badge {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 28px 20px;
    }
    
    .stat-item::after {
        display: none !important;
    }
    
    .stat-number {
        font-size: 32px;
    }
    
    .section {
        padding: 64px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .vision-card {
        padding: 28px 24px;
    }
    
    .timeline-track {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .case-header {
        padding: 24px;
    }
    
    .case-body {
        padding: 24px;
    }
    
    .case-link {
        padding: 16px 24px;
    }
    
    .process-track {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .badge-tag {
        display: none;
    }
    
    .client-badge {
        padding: 12px 20px;
        gap: 10px;
    }
    
    .badge-icon {
        width: 32px;
        height: 32px;
        font-size: 15px;
    }
    
    .badge-name {
        font-size: 14px;
    }
    
    .contact-card {
        padding: 24px;
    }
    
    .contact-card-cta {
        flex-direction: column;
        text-align: center;
        padding: 20px 24px;
    }
    
    .contact-form-wrap {
        padding: 28px 24px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
    
    .b-sep {
        display: none;
    }
    
    .modal {
        padding: 36px 24px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
    }
}

/* ============================================
   小屏移动端
   ============================================ */
@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .logo-en {
        display: none;
    }
    
    .process-track {
        grid-template-columns: 1fr;
    }
}