/* ============================================
   明策智能官网 - 全新设计系统
   理念: 专业、克制、可信赖的科技企业形象
   ============================================ */

/* ============================================
   1. CSS Variables - 色彩系统
   ============================================ */
:root {
    /* 品牌色 - 克制的科技蓝 */
    --brand-50: #eff6ff;
    --brand-100: #dbeafe;
    --brand-200: #bfdbfe;
    --brand-300: #93c5fd;
    --brand-400: #60a5fa;
    --brand-500: #3b82f6;
    --brand-600: #2563eb;
    --brand-700: #1d4ed8;
    --brand-800: #1e40af;
    --brand-900: #1e3a8a;

    /* 中性色 */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* 功能色 */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    /* 语义化变量 */
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-surface: #ffffff;
    --color-surface-alt: #f1f5f9;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #64748b;
    --color-text-dim: #94a3b8;
    --color-text-inverse: #ffffff;

    --color-primary: #2563eb;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1d4ed8;
    --color-accent: #0ea5e9;

    /* 字体系统 */
    --font-display: 'Space Grotesk', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;

    /* 字号 */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* 间距 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(37, 99, 235, 0.15);

    /* 过渡 */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

    /* 容器 */
    --container-max: 1280px;
    --container-padding: 1.5rem;
}

/* ============================================
   2. Reset & Base
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ============================================
   3. 布局工具类
   ============================================ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-narrow {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ============================================
   4. 导航栏
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 0 var(--container-padding);
    height: 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-base);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
    border-bottom-color: rgba(255, 255, 255, 0.4);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.nav-logo img {
    height: 3rem;
    width: auto;
    display: block;
}

.nav-tagline {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: var(--color-bg-alt);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    background: rgba(241, 245, 249, 0.5);
    padding: var(--space-1);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(226, 232, 240, 0.5);
}

.nav-link {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
    transition: width 0.35s cubic-bezier(0.16, 1, 0.3, 1), left 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    transform: translateX(-50%);
}

.nav-link:hover {
    color: var(--color-primary);
    background: rgba(255, 255, 255, 0.8);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

.nav-link.active {
    color: var(--color-primary);
    font-weight: 600;
}

.nav-cta svg {
    margin-right: 0.35rem;
    flex-shrink: 0;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    background: var(--color-primary);
    color: var(--color-text-inverse) !important;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    text-decoration: none;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    white-space: nowrap;
    margin-left: var(--space-3);
}

.nav-cta:hover {
    background: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
    color: var(--color-text-inverse);
}

.nav-cta:hover svg {
    animation: icon-pop 0.4s ease;
}

/* 移动端菜单按钮 - 默认桌面端隐藏 */
.nav-menu-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    cursor: pointer;
    color: var(--color-text);
}

/* 移动端菜单 */
.nav-links.open {
    display: flex;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-8);
    gap: var(--space-2);
    z-index: 999;
    animation: slideDown 0.3s ease-out;
    overflow-y: auto;
    height: calc(100vh - 72px);
    justify-content: flex-start;
    align-items: center;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.nav-links.open .nav-link {
    font-size: var(--text-lg);
    padding: var(--space-4) var(--space-6);
    width: 100%;
    max-width: 300px;
    text-align: center;
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
}

.nav-links.open .nav-link:hover {
    background: var(--brand-50);
    color: var(--color-primary);
    transform: translateX(4px);
}

.nav-links.open .nav-link.active {
    background: var(--brand-50);
    color: var(--color-primary);
    font-weight: 600;
}

.nav-links.open .nav-cta {
    display: none;
}

/* 移动端菜单打开时显示独立的 nav-cta */
.nav-links.open + .nav-cta {
    display: flex;
    position: fixed;
    top: auto;
    left: 50%;
    transform: translateX(-50%);
    bottom: calc(72px + var(--space-8));
    margin-left: 0;
    font-size: var(--text-lg);
    padding: var(--space-4) var(--space-8);
    width: auto;
    max-width: 300px;
    text-align: center;
    border-radius: var(--radius-lg);
    z-index: 1000;
}

/* ============================================
   5. 按钮系统
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.875rem 1.75rem;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-spring);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: none;
}

.btn-primary:hover::after {
    animation: shimmer 0.6s ease forwards;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid transparent;
}

.btn-ghost:hover {
    background: var(--color-bg-alt);
    color: var(--color-primary);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: var(--text-base);
}

.btn-sm {
    padding: 0.625rem 1.25rem;
    font-size: var(--text-xs);
}

/* CTA 区按钮变体 */
.btn-on-dark {
    background: white;
    color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.btn-on-dark:hover {
    box-shadow: var(--shadow-xl);
}

.btn-outline-light {
    background: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-light:hover {
    background: white;
    color: var(--color-primary);
    border-color: white;
}

/* ============================================
   6. Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: calc(var(--space-24) + 72px) var(--container-padding) var(--space-24);
    overflow: hidden;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite reverse;
}

/* Hero 浮动装饰粒子 */
.hero-carousel-bg::before,
.hero-carousel-bg::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    z-index: 0;
    pointer-events: none;
}

.hero-carousel-bg::before {
    width: 12px;
    height: 12px;
    top: 20%;
    right: 12%;
    background: rgba(37, 99, 235, 0.15);
    animation: bounce-subtle 3s ease-in-out infinite;
}

.hero-carousel-bg::after {
    width: 8px;
    height: 8px;
    top: 60%;
    left: 8%;
    background: rgba(14, 165, 233, 0.12);
    animation: bounce-subtle 4s ease-in-out infinite 1s;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.5rem 1.25rem;
    background: var(--brand-50);
    border: 1px solid var(--brand-200);
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-primary);
    margin-bottom: var(--space-6);
    font-weight: 500;
}

.hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
    box-shadow: 0 0 6px var(--color-accent);
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-6);
    color: var(--color-text);
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent), var(--color-primary));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 4s ease infinite;
}

.hero-desc {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-8);
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    margin-bottom: var(--space-16);
    flex-wrap: wrap;
}

/* Hero 统计数据 */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-16);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
}

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

.stat-number {
    display: inline-block;
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    transition: all 0.3s ease;
}

.stat-suffix {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-accent);
}

.stat-label {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-2);
}

.stat-item:hover .stat-number {
    transform: scale(1.1);
    color: var(--color-primary-dark);
    animation: bounce-subtle 0.4s ease;
}

/* ============================================
   7. Section 通用样式
   ============================================ */
.section {
    padding: var(--space-24) 0;
    position: relative;
}

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

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

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--space-16);
}

.logo-wall {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
    align-items: center;
    justify-items: center;
}

.logo-wall-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-8) var(--space-4);
    border-radius: var(--radius-lg);
    background: transparent;
    border: 1px solid var(--brand-50);
    box-sizing: border-box;
    width: 100%;
    min-height: 140px;
    transition: background 0.3s ease;
}

.logo-wall-item:hover {
    background: var(--brand-50);
}

.logo-wall-item img {
    width: 140px;
    height: 100px;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.logo-wall-item:hover img {
    transform: scale(1.1);
}

.logo-wall-name {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
}

@media (max-width: 768px) {
    .logo-wall {
        grid-template-columns: repeat(2, 1fr);
    }
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.875rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-4);
    color: var(--color-text);
}

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

/* ============================================
   8. 卡片系统
   ============================================ */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--transition-spring);
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-6px);
    border-color: var(--brand-300);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
}

.card:hover .card-icon {
    animation: icon-pop 0.5s ease;
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    color: white;
    font-size: 1.25rem;
}

.card-icon-light {
    background: var(--brand-50);
    color: var(--color-primary);
}

.card-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.card-text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* 图片卡片 */
.card-image {
    padding: 0;
    overflow: hidden;
}

.card-image .card-image-cover {
    aspect-ratio: 16/9;
    background: var(--color-bg-alt);
    overflow: hidden;
}

.card-image .card-image-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.card-image:hover .card-image-cover img {
    transform: scale(1.08);
}

.card-image .card-image-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.3) 50%, transparent 60%);
    background-size: 200% 200%;
    opacity: 0;
    transition: opacity 0.3s;
}

.card-image:hover .card-image-cover::after {
    opacity: 1;
    animation: shimmer 1s ease forwards;
}

.card-image .card-image-cover {
    position: relative;
}

.card-image-body {
    padding: var(--space-6);
}

/* ============================================
   9. 网格布局
   ============================================ */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.card-product {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-10) var(--space-6);
    text-decoration: none;
    color: inherit;
}

.card-product-logo {
    width: 200px;
    height: 80px;
    margin-bottom: var(--space-4);
}

.card-product-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.card-product-name {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
}

.card-product-tag {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-primary);
    background: var(--brand-50);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.card-product-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.card-product-link {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
    margin-top: auto;
}

/* 两列内容布局 */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

/* ============================================
   10. 组件：统计指标
   ============================================ */
.stat-block {
    display: flex;
    gap: var(--space-6);
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.stat-value {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label-sm {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* 大号统计指标（非卡片内） */
.stat-big {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-big-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* 统计卡片 */
.stat-card {
    text-align: center;
}

.stat-card .stat-card-value {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.stat-card .stat-card-suffix {
    font-size: var(--text-2xl);
}

.stat-card .stat-card-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ============================================
   11. 组件：标签
   ============================================ */
.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.25rem 0.75rem;
    background: var(--brand-50);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

/* 大号标签（带边框） */
.tag-lg {
    padding: 0.5rem 1rem;
    border: 1px solid var(--brand-200);
    font-family: var(--font-mono);
    margin-bottom: var(--space-4);
}

/* ============================================
   12. 组件：功能列表
   ============================================ */
.feature-list {
    list-style: none;
    padding: 0;
    margin-top: var(--space-4);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) 0;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.feature-check {
    flex-shrink: 0;
}

/* 带背景的功能项 */
.feature-item-bg {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    color: var(--color-text);
    font-size: var(--text-sm);
}

.section-alt .feature-item-bg {
    background: var(--color-bg);
}

/* ============================================
   13. 组件：图标块
   ============================================ */
.icon-block {
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.icon-block-sm {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

.icon-block-md {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
}

.icon-block-lg {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    margin: 0 auto var(--space-4);
}

.icon-block-gradient-1 { background: linear-gradient(135deg, var(--brand-500), var(--brand-700)); }
.icon-block-gradient-2 { background: linear-gradient(135deg, var(--color-accent), var(--brand-600)); }
.icon-block-gradient-3 { background: linear-gradient(135deg, #10b981, var(--brand-600)); }
.icon-block-gradient-4 { background: linear-gradient(135deg, #f59e0b, var(--brand-600)); }

/* ============================================
   14. 组件：团队头像
   ============================================ */
.team-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--text-2xl);
    font-weight: 700;
    margin: 0 auto var(--space-4);
}

.team-avatar-gradient-1 { background: linear-gradient(135deg, var(--brand-500), var(--brand-700)); }
.team-avatar-gradient-2 { background: linear-gradient(135deg, var(--color-accent), var(--brand-600)); }
.team-avatar-gradient-3 { background: linear-gradient(135deg, #10b981, var(--brand-600)); }
.team-avatar-gradient-4 { background: linear-gradient(135deg, #f59e0b, var(--brand-600)); }

.team-name {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.team-role {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ============================================
   15. 组件：发展历程（样式在 about 页面区域定义）
   ============================================ */

/* ============================================
   16. 组件：CTA 区
   ============================================ */
.section-cta {
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--gray-800) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.section-cta::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.section-cta::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite reverse;
}

.cta-container {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-container .section-title {
    color: white;
    margin-top: var(--space-4);
}

.cta-desc {
    color: rgba(255, 255, 255, 0.7);
    max-width: 550px;
    margin: 0 auto var(--space-8);
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   17. 组件：联系页
   ============================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-12);
    align-items: start;
}

.contact-info-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
}

.contact-info-title {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.contact-info-text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* 表单 */
.form-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
}

.form-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-6);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder {
    color: var(--color-text-dim);
}

textarea.form-input {
    resize: vertical;
}

/* ============================================
   18. 组件：占位图区域
   ============================================ */
.placeholder-visual {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--brand-100), var(--brand-50));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   19. Footer
   ============================================ */
.footer {
    background: var(--color-bg-dark);
    color: var(--color-text-inverse);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
    display: block;
}

.footer-logo span {
    color: var(--color-primary-light);
}

.footer-brand p {
    font-size: var(--text-sm);
    color: var(--color-text-dim);
    line-height: 1.7;
}

.footer-column h4 {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-inverse);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-column a {
    display: block;
    color: var(--color-text-dim);
    text-decoration: none;
    font-size: var(--text-sm);
    padding: var(--space-1) 0;
    transition: all var(--transition-fast);
}

.footer-column a:hover {
    transform: translateX(4px);
    color: var(--color-primary);
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-bottom p {
    font-size: var(--text-sm);
    color: var(--color-text-dim);
}

/* ============================================
   20. 轮播
   ============================================ */
.hero-carousel {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: calc(var(--space-24) + 72px) var(--container-padding) var(--space-24);
}

.hero-carousel-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.hero-carousel-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.hero-carousel-bg::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite reverse;
}

.hero-carousel-item {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1;
    pointer-events: none;
}

.hero-slide-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-carousel-item.active .hero-slide-bg {
    opacity: 1;
}

.hero-carousel-item.active {
    opacity: 1;
    pointer-events: auto;
}

.hero-carousel-item .hero-content {
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-carousel-item.active .hero-content {
    transform: translateY(0);
}

.carousel-indicators {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--space-3);
    z-index: 10;
}

.carousel-indicator {
    width: 40px;
    height: 4px;
    border-radius: var(--radius-full);
    background: var(--color-border);
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    padding: 0;
}

.carousel-indicator.active {
    background: var(--color-primary);
    width: 60px;
}

.carousel-indicator:hover {
    background: var(--color-primary-light);
}

.carousel-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: white;
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    color: var(--color-text);
}

.carousel-nav:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-50%) scale(1.1);
}

.carousel-nav.prev {
    left: var(--space-6);
}

.carousel-nav.next {
    right: var(--space-6);
}

/* 通用轮播样式 */
.carousel {
    position: relative;
    overflow: hidden;
}

.carousel-inner {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.carousel-item {
    min-width: 100%;
    flex-shrink: 0;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-border);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dot.active {
    background: var(--color-primary);
    width: 24px;
    border-radius: var(--radius-full);
}

.carousel-dot:hover {
    background: var(--color-primary-light);
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: white;
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.carousel-arrow:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-50%) scale(1.1);
}

.carousel-arrow.prev { left: var(--space-4); }
.carousel-arrow.next { right: var(--space-4); }

/* ============================================
   21. 动画效果
   ============================================ */

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-60px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(60px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

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

@keyframes shimmer {
    0% { background-position: -200% center; }
    100% { background-position: 200% center; }
}

@keyframes bounce-subtle {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes icon-pop {
    0% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.15) rotate(-5deg); }
    100% { transform: scale(1) rotate(0deg); }
}

@keyframes ripple {
    0% { transform: scale(1); opacity: 0.4; }
    100% { transform: scale(2.5); opacity: 0; }
}

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

/* 动画工具类 */
.animate-fade-in { animation: fadeIn 0.8s ease-out forwards; }
.animate-fade-in-up { animation: fadeInUp 0.8s ease-out forwards; }
.animate-slide-left { animation: slideInLeft 0.8s ease-out forwards; }
.animate-slide-right { animation: slideInRight 0.8s ease-out forwards; }
.animate-scale-in { animation: scaleIn 0.6s ease-out forwards; }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-60px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(60px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* 交错动画延迟 */
.reveal:nth-child(1) { transition-delay: 0s; }
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }
.reveal:nth-child(5) { transition-delay: 0.4s; }
.reveal:nth-child(6) { transition-delay: 0.5s; }

/* ============================================
   22. 响应式
   ============================================ */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .content-grid {
        gap: var(--space-10);
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
    }

    .nav-links {
        display: none;
    }

    .nav-cta {
        display: none;
    }

    .nav-menu-btn {
        display: flex;
    }

    .hero-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        gap: var(--space-8);
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .content-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

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

    .section {
        padding: var(--space-16) 0;
    }

    .carousel-nav,
    .carousel-arrow {
        display: none;
    }

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

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

/* ============================================
   23. 工具类
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }

.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }

.hidden { display: none; }

/* ============================================
   产品详情页
   ============================================ */
.product-hero {
    padding-top: 140px;
    padding-bottom: var(--space-20);
    background: linear-gradient(180deg, var(--brand-50) 0%, var(--color-bg) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.product-hero::before {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
    top: -100px;
    right: -100px;
    pointer-events: none;
}

.product-hero::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.06) 0%, transparent 70%);
    bottom: -50px;
    left: -80px;
    pointer-events: none;
}

.product-hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
}

.product-hero-logo {
    width: 96px;
    height: 96px;
    object-fit: contain;
    margin: 0 auto var(--space-6);
}

.product-hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-3);
}

.product-hero-tag {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-primary);
    background: var(--brand-50);
    border: 1px solid var(--brand-200);
    padding: var(--space-1) var(--space-4);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-6);
}

.product-hero-slogan {
    font-size: var(--text-xl);
    color: var(--color-text);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.product-hero-desc {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-8);
}

.product-hero-actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

/* 功能特性卡片 */
.product-feature-card {
    text-align: center;
    padding: var(--space-8) var(--space-5);
}

.product-feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
    border-radius: var(--radius-lg);
    color: white;
}

.product-feature-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.product-feature-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 应用场景 */
.product-scenarios {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.product-scenario-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    position: relative;
    overflow: hidden;
}

.product-scenario-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--brand-500), var(--brand-300));
    border-radius: 4px 0 0 4px;
}

.product-scenario-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.product-scenario-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 核心优势 */
.product-advantages {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.product-advantage-item {
    text-align: center;
    padding: var(--space-8) var(--space-4);
    background: var(--brand-50);
    border-radius: var(--radius-xl);
}

.product-advantage-value {
    display: block;
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
}

.product-advantage-label {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

@media (max-width: 768px) {
    .product-scenarios {
        grid-template-columns: 1fr;
    }

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

/* ============================================
   产品架构 & 服务流程
   ============================================ */
.tech-stack {
    max-width: 900px;
    margin: 0 auto;
}

.tech-stack-layer {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5) var(--space-6);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.tech-stack-label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-primary);
    background: var(--brand-50);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    white-space: nowrap;
    min-width: 64px;
    text-align: center;
}

.tech-stack-items {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.tech-stack-item {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    background: var(--color-bg-alt);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
}

.tech-stack-connector {
    width: 2px;
    height: var(--space-4);
    background: linear-gradient(180deg, var(--brand-300), var(--brand-100));
    margin: 0 auto;
    border-radius: 1px;
}

/* 服务流程 */
.service-flow {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
}

.service-flow-item {
    flex: 1;
    max-width: 200px;
    text-align: center;
}

.service-flow-number {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
}

.service-flow-title {
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.service-flow-desc {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.service-flow-arrow {
    display: flex;
    align-items: center;
    padding-top: var(--space-4);
    color: var(--color-text-dim);
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .tech-stack-layer {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
    }

    .service-flow {
        flex-direction: column;
        align-items: center;
        gap: var(--space-4);
    }

    .service-flow-arrow {
        transform: rotate(90deg);
        padding-top: 0;
    }

    .service-flow-item {
        max-width: 320px;
    }
}

/* ============================================
   关于页面
   ============================================ */
.stat-big {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.stat-big-label {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-1);
}

/* 使命愿景价值观 */
.mission-card {
    text-align: center;
    padding: var(--space-10) var(--space-6);
}

.mission-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
    background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
    border-radius: var(--radius-xl);
    color: white;
}

.mission-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.mission-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* 时间线 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--brand-200), var(--brand-400), var(--brand-200));
    transform: translateX(-50%);
}

.timeline-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: var(--space-4);
}

.timeline-item-content {
    text-align: right;
}

.timeline-item-content-right {
    text-align: left;
}

.timeline-item-content,
.timeline-item-content-right {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
}

/* 空内容侧不显示卡片样式 */
.timeline-item-content:empty,
.timeline-item-content-right:empty {
    background: none;
    border: none;
    padding: 0;
}

.timeline-year {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.timeline-title {
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.timeline-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.timeline-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 3px solid white;
    box-shadow: 0 0 0 2px var(--brand-200);
    position: relative;
    z-index: 1;
    justify-self: center;
}

/* 团队 */
.team-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: white;
    margin: 0 auto var(--space-4);
}

.team-avatar-gradient-1 { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.team-avatar-gradient-2 { background: linear-gradient(135deg, #8b5cf6, #6d28d9); }
.team-avatar-gradient-3 { background: linear-gradient(135deg, #0ea5e9, #0284c7); }
.team-avatar-gradient-4 { background: linear-gradient(135deg, #f59e0b, #d97706); }

.team-name {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.team-role {
    font-size: var(--text-xs);
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--space-3);
}

.team-desc {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* 资质荣誉 */
.honor-card {
    padding: var(--space-8) var(--space-4);
}

.honor-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    background: var(--brand-50);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
}

.honor-title {
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.honor-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

@media (max-width: 768px) {
    .timeline-line {
        left: 20px;
    }

    .timeline-item {
        grid-template-columns: auto 1fr;
    }

    .timeline-item-content {
        text-align: left;
    }

    /* 移动端隐藏空侧 */
    .timeline-item-content:empty,
    .timeline-item-content-right:empty {
        display: none;
    }
}