/* ============================================
   杭州秀源智能科技有限公司 - 官网样式 v2.0
   UI Design System by Pixel君
   ============================================ */

/* ============================================
   🎨 Design Token System (升级版)
   ============================================ */
:root {
    /* 品牌主色系 */
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;
    --primary-200: #bae6fd;
    --primary-300: #7dd3fc;
    --primary-400: #38bdf8;
    --primary-500: #0ea5e9;  /* 主色 */
    --primary-600: #0284c7;  /* 主色深 */
    --primary-700: #0369a1;
    --primary-800: #075985;
    --primary-900: #0c4a6e;

    /* 辅助色系 */
    --accent-cyan: #06b6d4;
    --accent-emerald: #10b981;
    --accent-amber: #f59e0b;
    --accent-violet: #8b5cf6;
    --accent-rose: #ef4444;

    /* 中性灰阶 */
    --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;

    /* 文字颜色 */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    /* 背景色 */
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: linear-gradient(135deg, #0a1628 0%, #0f2847 30%, #0c4a6e 60%, #075985 100%);

    /* 边框 */
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;

    /* 阴影系统（升级） */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.04);
    --shadow-base: 0 2px 4px -1px rgb(0 0 0 / 0.06), 0 4px 6px -1px rgb(0 0 0 / 0.08);
    --shadow-md: 0 4px 12px -2px rgb(0 0 0 / 0.08), 0 8px 16px -4px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 25px -5px rgb(0 0 0 / 0.08), 0 16px 32px -8px rgb(0 0 0 / 0.06);
    --shadow-xl: 0 20px 40px -10px rgb(0 0 0 / 0.12), 0 32px 64px -16px rgb(0 0 0 / 0.08);
    --shadow-glow: 0 0 60px rgba(14, 165, 233, 0.18);
    --shadow-glow-lg: 0 0 100px rgba(14, 165, 233, 0.25);
    --shadow-card-hover: 0 20px 50px -15px rgba(14, 165, 233, 0.25);

    /* 圆角系统 */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;

    /* 过渡系统 */
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --transition-fast: 0.15s var(--ease-out-quart);
    --transition: 0.35s var(--ease-out-expo);
    --transition-slow: 0.5s var(--ease-out-expo);

    /* 布局 */
    --container-max: 1280px;
    --container-padding: 24px;
    --nav-height: 72px;
}

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

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.65;
    color: var(--text-primary);
    background: var(--bg-white);
    overflow-x: hidden;
}

::selection {
    background: var(--primary-400);
    color: white;
}

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

ul { list-style: none; }
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ============================================
   🎯 Buttons (按钮系统升级)
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.btn:hover::before { opacity: 1; }

.btn-primary {
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4), inset 0 1px 0 rgba(255,255,255,0.15);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(14, 165, 233, 0.45), inset 0 1px 0 rgba(255,255,255,0.2);
}

.btn-primary:active { transform: translateY(-1px); }

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1.5px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(12px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-medium);
}

.btn-outline:hover {
    border-color: var(--primary-500);
    color: var(--primary-600);
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.15);
}

.btn-white {
    background: white;
    color: var(--primary-600);
    box-shadow: var(--shadow-lg);
    font-weight: 700;
}

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

.btn-outline-white {
    background: transparent;
    color: white;
    border: 1.5px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.55);
}

.btn-lg {
    padding: 17px 36px;
    font-size: 16px;
    border-radius: var(--radius-lg);
}

/* ============================================
   📐 Section Headers (标题组件)
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 72px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 18px;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.08), rgba(6, 182, 212, 0.12));
    color: var(--primary-700);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    margin-bottom: 18px;
    position: relative;
}

.section-tag::before {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--primary-500);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--primary-400);
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 18px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto;
    line-height: 1.75;
}

/* ============================================
   🧭 Navbar (导航栏升级)
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--border-light);
    box-shadow: 0 1px 20px rgba(0,0,0,0.06);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-height);
}

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

.logo-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    filter: drop-shadow(0 3px 12px rgba(14, 165, 233, 0.28));
    transition: transform var(--transition);
}

.logo:hover .logo-icon {
    transform: scale(1.06) rotate(-2deg);
}

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

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

.logo-name {
    font-size: 18px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.logo-en {
    font-size: 9px;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.8px;
    line-height: 1.2;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2px;
}

.nav-link {
    padding: 9px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 18px;
    height: 2.5px;
    background: var(--primary-500);
    border-radius: 2px;
    transition: transform var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-600);
    background: rgba(14, 165, 233, 0.06);
}

.nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.mobile-toggle:hover { background: var(--gray-100); }
.mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ============================================
   🚀 Hero Section (首屏升级)
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(145deg, #071320 0%, #0d2642 25%, #0c4a6e 55%, #075985 80%, #0369a1 100%);
}

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

/* 图片背景层 */
.hero-image-bg {
    position: absolute;
    inset: 0;
    background-image: url('images/hero-bg.svg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.85;
    animation: heroBgZoom 20s ease-in-out infinite alternate;
}

@keyframes heroBgZoom {
    0% { transform: scale(1.0); }
    100% { transform: scale(1.08); }
}

/* 渐变遮罩层（保证文字可读性） */
.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(7,19,32,0.85) 0%, rgba(7,19,32,0.6) 50%, rgba(12,74,110,0.7) 100%),
        radial-gradient(ellipse at center, transparent 0%, rgba(7,19,32,0.5) 100%);
    z-index: 1;
}

.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 2;
}

.hero-particles::before {
    content: '';
    position: absolute;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.18) 0%, transparent 70%);
    top: -220px;
    right: -120px;
    animation: heroFloat 10s ease-in-out infinite;
}

.hero-particles::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.14) 0%, transparent 70%);
    bottom: -120px;
    left: -120px;
    animation: heroFloat 12s ease-in-out infinite reverse;
}

.hero-glow {
    position: absolute;
    inset: 0;
    z-index: 2;
    background:
        radial-gradient(ellipse at 18% 50%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 82% 30%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 90%, rgba(14, 165, 233, 0.05) 0%, transparent 40%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 130px 24px 60px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 24px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-full);
    color: rgba(255, 255, 255, 0.85);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 36px;
    backdrop-filter: blur(12px);
    animation: fadeInDown 0.8s var(--ease-out-expo);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-emerald);
    border-radius: 50%;
    animation: pulse 2.5s ease-in-out infinite;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.5);
}

.hero-title { margin-bottom: 28px; animation: fadeInUp 0.9s var(--ease-out-expo); }

.title-line {
    display: block;
    font-size: 68px;
    font-weight: 900;
    color: white;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.title-line.accent {
    background: linear-gradient(135deg, var(--primary-300), var(--primary-500), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.68);
    line-height: 1.85;
    margin-bottom: 44px;
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s 0.2s var(--ease-out-expo) both;
}

.hero-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 88px;
    animation: fadeInUp 1s 0.35s var(--ease-out-expo) both;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 28px 44px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(16px);
    animation: fadeInUp 1s 0.5s var(--ease-out-expo) both;
}

.stat-item {
    display: flex;
    align-items: baseline;
    gap: 4px;
    padding: 0 36px;
}

.stat-number {
    font-size: 40px;
    font-weight: 900;
    color: white;
    line-height: 1;
    letter-spacing: -0.02em;
}

.stat-suffix {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-300);
}

.stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.45);
    margin-left: 10px;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 44px;
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.15), transparent);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: fadeInUp 1.2s 0.8s var(--ease-out-expo) both;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.35);
    font-size: 11px;
    letter-spacing: 0.5px;
}

.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-wheel {
    width: 4px;
    height: 10px;
    background: rgba(255, 255, 255, 0.55);
    border-radius: 2px;
    animation: scrollWheel 2.2s ease-in-out infinite;
}

/* ============================================
   💼 Services Section (服务板块升级)
   ============================================ */
.services {
    padding: 120px 0;
    background: var(--bg-white);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 280px;
    background: linear-gradient(180deg, var(--gray-50), transparent);
    pointer-events: none;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    position: relative;
    z-index: 1;
}

.service-card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 36px 26px 32px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-cyan));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.service-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(14,165,233,0.02), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
}

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

.service-icon { margin-bottom: 24px; }

.icon-bg {
    width: 62px;
    height: 62px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(6, 182, 212, 0.15));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: var(--primary-600);
    transition: all var(--transition);
    position: relative;
}

.icon-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: inset 0 0 0 0 var(--primary-400);
    transition: box-shadow var(--transition);
}

.service-card:hover .icon-bg {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    color: white;
    transform: scale(1.08) rotate(-3deg);
    box-shadow: 0 8px 25px rgba(14, 165, 233, 0.35);
}
.service-card:hover .icon-bg::after { box-shadow: inset 0 0 0 2px rgba(255,255,255,0.2); }

.icon-bg-2 { background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(5, 150, 105, 0.12)); color: var(--accent-emerald); }
.icon-bg-3 { background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(217, 119, 6, 0.12)); color: var(--accent-amber); }
.icon-bg-4 { background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(124, 58, 237, 0.12)); color: var(--accent-violet); }
.icon-bg-5 { background: linear-gradient(135deg, rgba(20, 184, 166, 0.1), rgba(13, 148, 136, 0.12)); color: #14b8a6; }

.service-card:hover .icon-bg-2 { background: linear-gradient(135deg, #10b981, #059669); color: white; }
.service-card:hover .icon-bg-3 { background: linear-gradient(135deg, #f59e0b, #d97706); color: white; }
.service-card:hover .icon-bg-4 { background: linear-gradient(135deg, #8b5cf6, #7c3aed); color: white; }
.service-card:hover .icon-bg-5 { background: linear-gradient(135deg, #14b8a6, #0d9488); color: white; }

.service-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.service-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.72;
    margin-bottom: 20px;
}

.service-features { margin-bottom: 24px; }

.service-features li {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 13px;
    color: var(--text-secondary);
    padding: 5px 0;
}

.service-features li i {
    color: var(--accent-emerald);
    font-size: 12px;
    flex-shrink: 0;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-600);
    transition: all var(--transition);
    position: relative;
}

.service-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1.5px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition);
}

.service-link:hover {
    gap: 12px;
    color: var(--primary-700);
}
.service-link:hover::after { transform: scaleX(1); transform-origin: left; }

/* ============================================
   ✨ Advantages Section (优势板块)
   ============================================ */
.advantages {
    padding: 120px 0;
    background: var(--bg-light);
    position: relative;
}

.advantages-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.advantages-content .section-tag { margin-bottom: 12px; }
.advantages-content .section-title { text-align: left; margin-bottom: 22px; }

.advantages-lead {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.82;
    margin-bottom: 40px;
}

.advantage-list { display: flex; flex-direction: column; gap: 18px; }

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding: 22px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: all var(--transition);
}

.advantage-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-300);
    transform: translateX(6px);
}

.advantage-icon {
    width: 52px;
    height: 52px;
    min-width: 52px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 21px;
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.advantage-info h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.advantage-info p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.65;
}

.advantages-visual { display: flex; justify-content: center; }

.visual-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 440px;
    overflow: hidden;
    border: 1px solid var(--border-light);
}

.visual-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
    background: var(--gray-50);
}

.visual-dots { display: flex; gap: 6px; }
.visual-dots span {
    width: 10px; height: 10px; border-radius: 50%;
}
.visual-dots span:nth-child(1) { background: #ff5f57; }
.visual-dots span:nth-child(2) { background: #febc2e; }
.visual-dots span:nth-child(3) { background: #28c840; }

.visual-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.visual-steps { padding: 24px; display: flex; flex-direction: column; gap: 14px; }

.v-step {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 18px;
    border-radius: var(--radius-md);
    background: var(--bg-light);
    transition: all var(--transition);
}

.v-step.active {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.08), rgba(6, 182, 212, 0.1));
    border: 1px solid rgba(14, 165, 233, 0.15);
}

.v-step-num {
    font-size: 12px;
    font-weight: 800;
    color: var(--primary-600);
    width: 30px;
    min-width: 30px;
    letter-spacing: 0.5px;
}

.v-step-content { flex: 1; }
.v-step-content h5 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2px;
}
.v-step-content p { font-size: 12px; color: var(--text-muted); }

.v-step-status {
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--accent-emerald);
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 11px;
}
.v-step-status.processing { background: var(--accent-amber); }

.status-spinner {
    width: 14px; height: 14px;
    border: 2px solid white; border-top-color: transparent;
    border-radius: 50%; animation: spin 1s linear infinite;
}

.v-step:not(.active) .v-step-status { background: var(--gray-300); }

/* ============================================
   🏢 About Section (关于我们)
   ============================================ */
.about {
    padding: 120px 0;
    background: var(--bg-white);
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-visual { position: relative; }
.about-image-wrapper { position: relative; }

.about-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-img-placeholder {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #0c4a6e, #075985);
    display: block;
    position: relative;
    overflow: hidden;
}

.about-img-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 82% 18%, rgba(56,189,248,0.28), transparent 58%);
    pointer-events: none;
}

.about-img-placeholder svg {
    width: 100%;
    height: 100%;
    display: block;
}

.about-float-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 22px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    animation: floatIn 0.8s var(--ease-out-expo) both;
}

.card-experience { top: 40px; right: -20px; animation-delay: 0.2s; }
.card-team { bottom: 60px; left: -20px; animation-delay: 0.4s; }

.float-icon {
    width: 46px; height: 46px;
    min-width: 46px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 18px;
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.float-content { display: flex; flex-direction: column; }
.float-number {
    font-size: 24px;
    font-weight: 900;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.02em;
}
.float-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 3px;
    font-weight: 500;
}

.about-content .section-tag { margin-bottom: 12px; }
.about-content .section-title { text-align: left; margin-bottom: 24px; }

.about-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.82;
    margin-bottom: 20px;
}

.about-mission {
    margin: 32px 0;
    padding: 26px 30px;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.05), rgba(6, 182, 212, 0.08));
    border-left: 4px solid var(--primary-500);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.mission-quote {
    display: flex;
    gap: 16px;
}

.mission-quote i {
    font-size: 26px;
    color: var(--primary-500);
    opacity: 0.45;
}

.mission-quote p {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    font-style: italic;
    line-height: 1.65;
}

.about-buttons { margin-top: 34px; }

/* ============================================
   📊 Data Section (数据展示)
   ============================================ */
.data-section {
    padding: 88px 0;
    background: linear-gradient(135deg, var(--gray-900), #1a2744);
    position: relative;
    overflow: hidden;
}

.data-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 28% 52%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 72% 48%, rgba(6, 182, 212, 0.07) 0%, transparent 50%);
}

.data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.data-card {
    text-align: center;
    padding: 42px 24px 36px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: var(--radius-xl);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.data-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-400), var(--accent-cyan));
    border-radius: 0 0 3px 3px;
    opacity: 0;
    transition: opacity var(--transition);
}

.data-card:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-6px);
    border-color: rgba(14, 165, 233, 0.2);
}
.data-card:hover::before { opacity: 1; }

.data-icon {
    width: 58px; height: 58px;
    margin: 0 auto 18px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(6, 182, 212, 0.2));
    display: flex; align-items: center; justify-content: center;
    color: var(--primary-300);
    font-size: 24px;
    transition: all var(--transition);
}
.data-card:hover .data-icon {
    transform: scale(1.1);
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.3);
}

.data-number {
    display: inline;
    font-size: 46px;
    font-weight: 900;
    color: white;
    line-height: 1;
    letter-spacing: -0.03em;
}

.data-suffix {
    display: inline;
    font-size: 26px;
    font-weight: 700;
    color: var(--primary-300);
}

.data-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.45);
    margin-top: 10px;
    font-weight: 500;
}

/* ============================================
   🎯 CTA Section (行动召唤区)
   ============================================ */
.cta-section {
    position: relative;
    padding: 108px 0;
    background: linear-gradient(145deg, #071320 0%, #0c4a6e 50%, #075985 100%);
    overflow: hidden;
}

.cta-bg { position: absolute; inset: 0; }
.cta-particles { position: absolute; inset: 0; }

.cta-particles::before {
    content: ''; position: absolute;
    width: 550px; height: 550px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.14) 0%, transparent 70%);
    top: -160px; left: 8%;
    animation: heroFloat 12s ease-in-out infinite;
}

.cta-particles::after {
    content: ''; position: absolute;
    width: 420px; height: 420px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
    bottom: -110px; right: 8%;
    animation: heroFloat 14s ease-in-out infinite reverse;
}

.cta-content {
    position: relative; z-index: 1;
    text-align: center; max-width: 720px; margin: 0 auto;
}

.cta-content h2 {
    font-size: 44px;
    font-weight: 900;
    color: white;
    margin-bottom: 22px;
    letter-spacing: -0.02em;
}

.cta-content p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.68);
    line-height: 1.82;
    margin-bottom: 42px;
}

.cta-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

/* ============================================
   📍 Footer (页脚)
   ============================================ */
.footer {
    background: var(--gray-900);
    color: white;
}

.footer-main { padding: 84px 0 44px; }

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
}

.footer-brand { max-width: 340px; }

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 22px;
}

.footer-logo .logo-icon {
    width: 42px; height: 42px;
    display: flex; align-items: center; justify-content: center;
    filter: drop-shadow(0 3px 12px rgba(14, 165, 233, 0.35));
}

.footer-logo .logo-name { color: white; }
.footer-logo .logo-en { color: rgba(255, 255, 255, 0.35); }

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.45);
    line-height: 1.75;
    margin-bottom: 26px;
}

.footer-social { display: flex; gap: 10px; }

.social-link {
    width: 42px; height: 42px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.06);
    display: flex; align-items: center; justify-content: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 17px;
    transition: all var(--transition);
    border: 1px solid rgba(255,255,255,0.05);
}

.social-link:hover {
    background: var(--primary-500);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.35);
    border-color: transparent;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    font-weight: 700;
    color: white;
    margin-bottom: 22px;
    letter-spacing: 0.01em;
}

.footer-links ul { display: flex; flex-direction: column; gap: 13px; }

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.42);
    transition: all var(--transition-fast);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--primary-300);
    padding-left: 5px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 18px;
}

.contact-item i {
    width: 20px; margin-top: 3px;
    color: var(--primary-400);
    font-size: 14px;
    flex-shrink: 0;
}

.contact-item span {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.45);
    line-height: 1.65;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 26px 0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-bottom-content p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.28);
}

/* ============================================
   ⬆️ Back to Top
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 17px;
    box-shadow: 0 6px 22px rgba(14, 165, 233, 0.42);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(14, 165, 233, 0.5);
}

/* ============================================
   🎬 Animations (动画系统)
   ============================================ */
@keyframes heroFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-24px) rotate(2deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.25); }
}

@keyframes scrollWheel {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(14px); }
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(28px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes floatIn {
    from { opacity: 0; transform: translateX(20px) scale(0.92); }
    to { opacity: 1; transform: translateX(0) scale(1); }
}

/* ============================================
   📱 Responsive (响应式设计)
   ============================================ */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(3, 1fr); }
    .advantages-layout, .about-layout {
        grid-template-columns: 1fr;
        gap: 56px;
    }
    .advantages-visual, .about-visual { order: -1; }
    .data-grid { grid-template-columns: repeat(2, 1fr); }
    .partners-grid { grid-template-columns: repeat(2, 1fr); }
    .case-card { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }

    .title-line { font-size: 52px; }
    .hero-stats { flex-wrap: wrap; gap: 20px; }
    .stat-divider { display: none; }
    .stat-item { padding: 0 20px; }
    .section-title { font-size: 36px; }
}

@media (max-width: 768px) {
    :root { --nav-height: 66px; }

    .nav-menu {
        position: fixed; top: var(--nav-height); left: 0; right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(24px);
        flex-direction: column; padding: 16px; gap: 2px;
        border-bottom: 1px solid var(--border-light);
        transform: translateY(-100%);
        opacity: 0; visibility: hidden;
        transition: all var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0); opacity: 1; visibility: visible;
    }

    .nav-link {
        padding: 13px 18px; width: 100%; text-align: center;
        font-size: 16px;
    }

    .mobile-toggle { display: flex; }
    .nav-actions .btn-outline { display: none; }

    .section-title { font-size: 30px; }
    .title-line { font-size: 40px; letter-spacing: -0.01em; }

    .hero-buttons { flex-direction: column; width: 100%; padding: 0 24px; }
    .hero-buttons .btn { width: 100%; }

    .services-grid, .data-grid, .partners-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }

    .news-item { flex-direction: column; align-items: flex-start; gap: 16px; }
    .news-date {
        flex-direction: row; gap: 8px;
        padding-right: 0; border-right: none;
        border-bottom: 1px solid var(--border-light);
        padding-bottom: 12px; width: 100%;
    }

    .case-info { padding: 28px; }
    .about-float-card { display: none; }

    .cta-buttons { flex-direction: column; width: 100%; padding: 0 24px; }
    .cta-buttons .btn { width: 100%; }
    .cta-content h2 { font-size: 30px; }

    .advantage-item:hover { transform: none; }
    .news-item:hover { transform: none; }

    .hero-content { padding: 116px 20px 56px; }
}

@media (max-width: 480px) {
    .hero-stats { padding: 20px 16px; }
    .stat-item {
        flex-direction: column; align-items: center; text-align: center;
        gap: 4px; padding: 12px 8px;
    }
    .stat-label { margin-left: 0; }
    .case-meta { flex-direction: column; gap: 8px; }
    .title-line { font-size: 36px; }
    .hero-image-bg { opacity: 0.5; }
}

/* ============================================
   🔧 Capability Section (维修能力体系)
   ============================================ */
.capability {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--bg-white) 100%);
    position: relative;
}

.capability-metrics {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 36px 48px;
    background: linear-gradient(135deg, var(--gray-900), #1a2744);
    border-radius: var(--radius-2xl);
    margin-bottom: 64px;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.capability-metrics::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 25% 50%, rgba(14, 165, 233, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 75% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
}

.metric-item {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 1;
}

.metric-value {
    font-size: 44px;
    font-weight: 900;
    color: white;
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: 8px;
}

.metric-unit {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-300);
    margin-left: 2px;
}

.metric-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.55);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.metric-divider {
    width: 1px;
    height: 56px;
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.15), transparent);
    margin: 0 16px;
}

.capability-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.capability-card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 36px 32px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.capability-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 4px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-cyan));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

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

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

.cap-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-light);
}

.cap-card-icon {
    width: 64px;
    height: 64px;
    min-width: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: white;
    transition: all var(--transition);
}

.cap-icon-1 { background: linear-gradient(135deg, var(--primary-500), var(--primary-700)); box-shadow: 0 8px 22px rgba(14, 165, 233, 0.3); }
.cap-icon-2 { background: linear-gradient(135deg, var(--accent-emerald), #059669); box-shadow: 0 8px 22px rgba(16, 185, 129, 0.3); }
.cap-icon-3 { background: linear-gradient(135deg, var(--accent-violet), #7c3aed); box-shadow: 0 8px 22px rgba(139, 92, 246, 0.3); }

.capability-card:hover .cap-card-icon {
    transform: scale(1.08) rotate(-3deg);
}

.cap-card-title h3 {
    font-size: 19px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}

.cap-card-title span {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.cap-card-body {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.cap-feature {
    padding: 18px 20px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-400);
    transition: all var(--transition);
}

.cap-feature:hover {
    background: rgba(14, 165, 233, 0.05);
    border-left-color: var(--primary-600);
    transform: translateX(4px);
}

.cap-feature-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.cap-feature-head i {
    color: var(--primary-500);
    font-size: 10px;
}

.cap-feature-head h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.cap-feature p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.72;
}

/* ============================================
   🏭 Facility Section (5大核心功能区)
   ============================================ */
.facility {
    padding: 120px 0;
    background: var(--bg-white);
    position: relative;
}

.facility-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.facility-stat {
    text-align: center;
    padding: 32px 20px;
    background: linear-gradient(135deg, var(--bg-light), var(--gray-100));
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    transition: all var(--transition);
}

.facility-stat:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-300);
}

.facility-stat-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto 16px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
    box-shadow: 0 6px 18px rgba(14, 165, 233, 0.3);
}

.facility-stat-num {
    font-size: 38px;
    font-weight: 900;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}

.facility-stat-num span {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-600);
    margin-left: 4px;
}

.facility-stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.facility-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 18px;
}

.facility-card {
    padding: 32px 22px;
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.facility-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, transparent, transparent);
    transition: background var(--transition);
    pointer-events: none;
    border-radius: inherit;
}

.facility-card-1::after { background: linear-gradient(135deg, rgba(14,165,233,0.06), transparent); }
.facility-card-2::after { background: linear-gradient(135deg, rgba(245,158,11,0.06), transparent); }
.facility-card-3::after { background: linear-gradient(135deg, rgba(16,185,129,0.06), transparent); }
.facility-card-4::after { background: linear-gradient(135deg, rgba(139,92,246,0.06), transparent); }
.facility-card-5::after { background: linear-gradient(135deg, rgba(6,182,212,0.06), transparent); }

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

.facility-num {
    font-size: 36px;
    font-weight: 900;
    color: var(--gray-200);
    line-height: 1;
    margin-bottom: 16px;
    letter-spacing: -0.03em;
    transition: color var(--transition);
}

.facility-card-1:hover .facility-num { color: var(--primary-500); }
.facility-card-2:hover .facility-num { color: var(--accent-amber); }
.facility-card-3:hover .facility-num { color: var(--accent-emerald); }
.facility-card-4:hover .facility-num { color: var(--accent-violet); }
.facility-card-5:hover .facility-num { color: var(--accent-cyan); }

.facility-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 18px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.facility-card-1:hover .facility-icon { background: linear-gradient(135deg, var(--primary-500), var(--primary-700)); color: white; }
.facility-card-2:hover .facility-icon { background: linear-gradient(135deg, #f59e0b, #d97706); color: white; }
.facility-card-3:hover .facility-icon { background: linear-gradient(135deg, var(--accent-emerald), #059669); color: white; }
.facility-card-4:hover .facility-icon { background: linear-gradient(135deg, var(--accent-violet), #7c3aed); color: white; }
.facility-card-5:hover .facility-icon { background: linear-gradient(135deg, var(--accent-cyan), #0891b2); color: white; }

.facility-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.facility-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   🔄 Techloop Section (6步全栈技术闭环)
   ============================================ */
.techloop {
    padding: 120px 0;
    background: linear-gradient(135deg, var(--gray-900), #1a2744);
    position: relative;
    overflow: hidden;
}

.techloop::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(6, 182, 212, 0.08) 0%, transparent 50%);
}

.techloop .section-tag {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.18), rgba(6, 182, 212, 0.22));
    color: var(--primary-300);
}

.techloop .section-tag::before { background: var(--primary-400); }

.techloop .section-title { color: white; }
.techloop .section-desc { color: rgba(255, 255, 255, 0.55); }

.techloop-flow {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 8px;
    position: relative;
    z-index: 1;
    flex-wrap: nowrap;
}

.techloop-step {
    flex: 1;
    min-width: 0;
    padding: 32px 18px 28px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.techloop-step::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-cyan));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.techloop-step:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-6px);
    border-color: rgba(14, 165, 233, 0.25);
}

.techloop-step:hover::before { transform: scaleX(1); }

.techstep-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(6, 182, 212, 0.2));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-300);
    font-size: 22px;
    transition: all var(--transition);
}

.techloop-step:hover .techstep-icon {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    color: white;
    transform: scale(1.1);
    box-shadow: 0 8px 22px rgba(14, 165, 233, 0.4);
}

.techstep-num {
    font-size: 12px;
    font-weight: 800;
    color: var(--primary-400);
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.techloop-step h4 {
    font-size: 16px;
    font-weight: 700;
    color: white;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.techloop-step p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.6;
}

.techloop-arrow {
    display: flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.25);
    font-size: 18px;
    transition: color var(--transition);
    align-self: center;
    padding: 0 4px;
}

.techloop-step:hover + .techloop-arrow { color: var(--primary-400); }

/* ============================================
   📱 Responsive for new sections
   ============================================ */
@media (max-width: 1024px) {
    .capability-grid { grid-template-columns: 1fr; gap: 20px; }
    .facility-grid { grid-template-columns: repeat(3, 1fr); }
    .facility-stats { grid-template-columns: repeat(2, 1fr); }
    .techloop-flow { flex-wrap: wrap; gap: 16px; }
    .techloop-step { flex: 1 1 calc(33.33% - 16px); min-width: 0; }
    .techloop-arrow { display: none; }
    .capability-metrics { flex-wrap: wrap; gap: 24px; padding: 32px 28px; }
    .metric-divider { display: none; }
    .metric-item { flex: 1 1 calc(50% - 12px); min-width: 120px; }
}

@media (max-width: 768px) {
    .capability-metrics { padding: 28px 20px; }
    .metric-value { font-size: 36px; }
    .facility-grid { grid-template-columns: repeat(2, 1fr); }
    .facility-stats { grid-template-columns: 1fr; }
    .techloop-step { flex: 1 1 100%; }
    .cap-card-header { flex-direction: column; text-align: center; gap: 12px; }
}

@media (max-width: 480px) {
    .facility-grid { grid-template-columns: 1fr; }
    .metric-item { flex: 1 1 100%; }
}