/* ========== CSS 变量 & 重置 ========== */
        :root {
            --bg-primary: #ffffff;
            --bg-secondary: #f0f4f8;
            --bg-blue-light: #eef4ff;
            --bg-alt: #e8edf5;
            --bg-card: #ffffff;
            --bg-card-hover: #f8fafc;
            --border-light: rgba(0, 0, 0, 0.07);
            --border-hover: rgba(37, 99, 235, 0.2);
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --blue: #2563eb;
            --blue-dark: #1d4ed8;
            --cyan: #0891b2;
            --red: #dc2626;
            --gold: #d97706;
            --gradient-primary: linear-gradient(135deg, #2563eb, #0891b2);
            --gradient-accent: linear-gradient(135deg, #dc2626, #d97706);
            --gradient-hero: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #0891b2 100%);
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
            --shadow-glow: 0 4px 24px rgba(37, 99, 235, 0.15);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

        html {
            scroll-behavior: smooth;
            overflow-x: hidden;
        }

        body {
            font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        body.no-scroll {
            overflow: hidden;
        }

        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg-secondary); }
        ::-webkit-scrollbar-thumb { background: rgba(37, 99, 235, 0.25); border-radius: 3px; }
        ::-webkit-scrollbar-thumb:hover { background: rgba(37, 99, 235, 0.4); }

        /* ========== 滚动进度条 ========== */
        #scroll-progress {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: 3px;
            background: var(--gradient-primary);
            z-index: 10000;
            transition: width 0.1s;
        }

        /* ========== 导航 ========== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 9999;
            padding: 18px 0;
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(12px);
            transition: all var(--transition);
        }
        .navbar .nav-links a { color: rgba(255, 255, 255, 0.8); }
        .navbar .nav-links a:hover { color: #ffffff; }
        .navbar .hamburger span { background: #ffffff; }

        .navbar.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px) saturate(1.5);
            border-bottom: 1px solid var(--border-light);
            padding: 12px 0;
            box-shadow: 0 1px 8px rgba(0,0,0,0.04);
        }
        .navbar.scrolled .nav-links a { color: var(--text-secondary); }
        .navbar.scrolled .nav-links a:hover { color: var(--text-primary); }
        .navbar.scrolled .hamburger span { background: var(--text-primary); }

        .navbar.section-gray {
            background: #f0f4f8;
        }

        .navbar .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .navbar .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--text-primary);
        }
        .navbar .logo-icon, .navbar .logo-img {
            width: 40px;
            height: 40px;
            border-radius: 10px;
        }
        .navbar .logo-img {
            object-fit: contain;
            /* background: #ffffff; */
            padding: 4px;
        }
        .navbar .logo-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 1px;
        }
        .navbar.scrolled .logo-text { color: var(--text-primary); }
        .navbar:not(.scrolled) .logo-text { color: #ffffff; }
        .navbar .logo-text span {
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar:not(.scrolled) .logo-text span {
            background: linear-gradient(135deg, #60a5fa, #22d3ee);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }
        .nav-links a {
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            transition: color var(--transition);
            position: relative;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--gradient-primary);
            transition: width var(--transition);
            border-radius: 1px;
        }
        .nav-links a:hover::after { width: 100%; }

        @media (min-width: 769px) {
            .nav-links li:last-child a {
                padding: 10px 24px;
                border-radius: 50px;
                font-weight: 600 !important;
                font-size: 14px !important;
                transition: all var(--transition) !important;
            }
            .navbar:not(.scrolled) .nav-links li:last-child a {
                background: rgba(255,255,255,0.9);
                color: #2563eb !important;
                box-shadow: 0 4px 16px rgba(0,0,0,0.08);
            }
            .navbar:not(.scrolled) .nav-links li:last-child a:hover {
                transform: translateY(-2px);
                box-shadow: 0 8px 30px rgba(37, 99, 235, 0.25);
                background: #ffffff;
            }
            .navbar.scrolled .nav-links li:last-child a {
                background: var(--gradient-primary);
                color: #ffffff !important;
                box-shadow: none;
            }
            .navbar.scrolled .nav-links li:last-child a:hover {
                box-shadow: 0 8px 30px rgba(37, 99, 235, 0.3);
            }
            .nav-links li:last-child a::after { display: none !important; }
        }

        /* 汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            background: none;
            border: none;
            padding: 4px;
            z-index: 9999;
        }
        .hamburger span {
            display: block;
            width: 28px;
            height: 2px;
            margin-bottom: 7px;
            border-radius: 2px;
            transition: all 0.4s;
            transform-origin: 2px center;
        }
        .hamburger span:last-child { margin-bottom: 0; }
        .hamburger.active span:nth-child(1) {
            transform: rotate(44deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-44deg);
        }

        /* ========== HERO ========== */
        #hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background: var(--gradient-hero);
        }
        #hero-canvas {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 0;
            opacity: 0;
            transition: opacity 1.5s ease;
            pointer-events: none;
        }
        #hero-canvas.active {
            opacity: 1;
        }
        .hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at center, rgba(30,58,138,0.1) 0%, rgba(30,58,138,0.4) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            padding: 0 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 50px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.9);
            background: rgba(255, 255, 255, 0.08);
            margin-bottom: 32px;
            animation: fadeInDown 1s ease 0.2s both;
        }
        .hero-badge i { font-size: 12px; }

        .hero-title {
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 24px;
            color: #ffffff;
            animation: fadeInUp 1s ease 0.4s both;
        }
        .hero-title .gradient-text {
            background: linear-gradient(135deg, #93c5fd, #22d3ee);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-title .highlight-red {
            background: linear-gradient(135deg, #fca5a5, #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: rgba(255, 255, 255, 0.75);
            max-width: 680px;
            margin: 0 auto 40px;
            font-weight: 400;
            animation: fadeInUp 1s ease 0.6s both;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            animation: fadeInUp 1s ease 0.8s both;
        }
        .btn {
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            border: none;
            font-family: inherit;
        }
        .btn-primary {
            background: #ffffff;
            color: var(--blue-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
        }
        .btn-outline {
            background: transparent;
            color: #ffffff;
            border: 1px solid rgba(255, 255, 255, 0.35);
        }
        .btn-outline:hover {
            border-color: #ffffff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        .scroll-indicator {
            position: absolute;
            bottom: 10px;
           
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 12px;
            letter-spacing: 2px;
            animation: fadeInUp 1s ease 1.2s both;
        }
        .scroll-indicator .mouse {
            width: 24px;
            height: 38px;
            border-radius: 12px;
            border: 2px solid rgba(255,255,255,0.2);
            display: flex;
            justify-content: center;
            padding-top: 8px;
        }
        .scroll-indicator .mouse-dot {
            width: 3px;
            height: 8px;
            background: #ffffff;
            border-radius: 2px;
            animation: scrollDot 2s ease infinite;
        }

        /* ===== 轮播场景容器 ===== */
        .hero-scene {
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            z-index: 0;
            opacity: 0;
            transition: opacity 1.5s ease;
            pointer-events: none;
            overflow: hidden;
        }
        .hero-scene.active { opacity: 1; }

        /* ===== 场景 2：数字网格 ===== */
        #heroScene2 .grid-bg {
            position: absolute; inset: 0;
            background-image:
                linear-gradient(rgba(147,197,253,0.07) 1px, transparent 1px),
                linear-gradient(90deg, rgba(147,197,253,0.07) 1px, transparent 1px);
            background-size: 70px 70px;
        }
        #heroScene2 .grid-beam {
            position: absolute;
            top: 0; left: -30%;
            width: 30%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(147,197,253,0.10), rgba(34,211,238,0.05), transparent);
            transform: skewX(-20deg);
            animation: beamSweep 7s ease-in-out infinite;
        }
        @keyframes beamSweep {
            0%, 100% { left: -30%; }
            50% { left: 100%; }
        }
        #heroScene2 .grid-dots {
            position: absolute; inset: 0;
            background-image: radial-gradient(circle, rgba(147,197,253,0.5) 1px, transparent 1px);
            background-size: 70px 70px;
        }
        #heroScene2 .grid-glow {
            position: absolute;
            width: 200px; height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(147,197,253,0.10), transparent 70%);
            animation: glowDrift 12s ease-in-out infinite;
        }
        #heroScene2 .grid-glow-2 {
            width: 150px; height: 150px;
            background: radial-gradient(circle, rgba(34,211,238,0.08), transparent 70%);
            animation: glowDrift 15s ease-in-out infinite reverse;
            top: 60%; left: 20%;
        }
        @keyframes glowDrift {
            0%, 100% { transform: translate(0, 0); }
            25% { transform: translate(100px, -50px); }
            50% { transform: translate(50px, 80px); }
            75% { transform: translate(-50px, 30px); }
        }
        #heroScene2 .grid-line-h {
            position: absolute; left: 0; right: 0; height: 1px;
            background: linear-gradient(90deg, transparent, rgba(147,197,253,0.15), transparent);
            animation: linePulse 4s ease-in-out infinite;
        }
        #heroScene2 .grid-line-v {
            position: absolute; top: 0; bottom: 0; width: 1px;
            background: linear-gradient(180deg, transparent, rgba(34,211,238,0.10), transparent);
            animation: linePulse 5s ease-in-out infinite 1s;
        }
        @keyframes linePulse {
            0%, 100% { opacity: 0.3; }
            50% { opacity: 1; }
        }
        #heroScene2 .grid-line-h-1 { top: 25%; animation-delay: 0s; }
        #heroScene2 .grid-line-h-2 { top: 55%; animation-delay: 1.5s; }
        #heroScene2 .grid-line-h-3 { top: 75%; animation-delay: 3s; }
        #heroScene2 .grid-line-v-1 { left: 30%; animation-delay: 0.5s; }
        #heroScene2 .grid-line-v-2 { left: 60%; animation-delay: 2s; }

        /* ===== 场景 3：数据光轮 ===== */
        #heroScene3 .ring-container {
            position: absolute;
            top: 50%; left: 50%;
            transform: translate(-50%, -50%);
            width: 1px; height: 1px;
        }
        #heroScene3 .ring {
            position: absolute;
            border-radius: 50%;
            border: 1px solid rgba(147,197,253,0.12);
            top: 50%; left: 50%;
            animation: ringSpin 25s linear infinite;
        }
        .ring::after {
            content: '';
            position: absolute;
            top: -3px; left: 50%;
            width: 6px; height: 6px;
            border-radius: 50%;
            background: #93c5fd;
            box-shadow: 0 0 20px rgba(147,197,253,0.6), 0 0 60px rgba(147,197,253,0.2);
            margin-left: -3px;
        }
        #heroScene3 .ring-1 { width: 250px; height: 250px; margin: -125px; }
        #heroScene3 .ring-2 { width: 420px; height: 420px; margin: -210px; animation-duration: 35s; animation-direction: reverse; }
        #heroScene3 .ring-3 { width: 600px; height: 600px; margin: -300px; animation-duration: 45s; }
        #heroScene3 .ring-2::after { background: #22d3ee; box-shadow: 0 0 20px rgba(34,211,238,0.6); }
        #heroScene3 .ring-3::after { background: #fbbf24; box-shadow: 0 0 20px rgba(251,191,36,0.5); width: 8px; height: 8px; margin-left: -4px; }
        @keyframes ringSpin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        #heroScene3 .orb-particle {
            position: absolute;
            border-radius: 50%;
            animation: orbFloatRandom 15s ease-in-out infinite;
        }
        #heroScene3 .orb-p1 {
            width: 8px; height: 8px;
            background: rgba(147,197,253,0.4);
            top: 20%; left: 15%;
            box-shadow: 0 0 30px rgba(147,197,253,0.2);
            animation-duration: 18s;
        }
        #heroScene3 .orb-p2 {
            width: 5px; height: 5px;
            background: rgba(34,211,238,0.5);
            top: 30%; right: 20%;
            animation-duration: 14s;
            animation-delay: -3s;
        }
        #heroScene3 .orb-p3 {
            width: 12px; height: 12px;
            background: rgba(251,191,36,0.15);
            bottom: 25%; left: 30%;
            box-shadow: 0 0 40px rgba(251,191,36,0.1);
            animation-duration: 20s;
            animation-delay: -7s;
        }
        #heroScene3 .orb-p4 {
            width: 6px; height: 6px;
            background: rgba(147,197,253,0.3);
            bottom: 35%; right: 25%;
            animation-duration: 12s;
            animation-delay: -5s;
        }
        #heroScene3 .orb-p5 {
            width: 3px; height: 3px;
            background: rgba(255,255,255,0.6);
            top: 45%; left: 45%;
            animation-duration: 22s;
            animation-delay: -2s;
        }
        @keyframes orbFloatRandom {
            0%, 100% { transform: translate(0, 0) scale(1); }
            20% { transform: translate(40px, -60px) scale(1.2); }
            40% { transform: translate(-30px, 30px) scale(0.8); }
            60% { transform: translate(60px, 20px) scale(1.1); }
            80% { transform: translate(-40px, -40px) scale(0.9); }
        }
        #heroScene3 .pulse-ring {
            position: absolute;
            top: 50%; left: 50%;
            border-radius: 50%;
            border: 1px solid rgba(147,197,253,0.08);
            animation: pulseExpand 4s ease-out infinite;
        }
        #heroScene3 .pulse-1 { width: 100px; height: 100px; margin: -50px; animation-delay: 0s; }
        #heroScene3 .pulse-2 { width: 100px; height: 100px; margin: -50px; animation-delay: 2s; }
        @keyframes pulseExpand {
            0% { transform: scale(0.5); opacity: 1; }
            100% { transform: scale(4); opacity: 0; }
        }

        /* 轮播指示点 */
        .hero-carousel-dots {
            position: absolute;
            bottom: 145px;

            z-index: 3;
            display: flex;
            gap: 10px;
        }
        .hero-carousel-dots .dot {
            width: 8px; height: 8px;
            border-radius: 50%;
            background: rgba(255,255,255,0.25);
            cursor: pointer;
            transition: all 0.5s ease;
            border: none;
            padding: 0;
        }
        .hero-carousel-dots .dot.active {
            width: 28px;
            border-radius: 4px;
            background: rgba(255,255,255,0.8);
        }

        /* ========== 通用区块样式 ========== */
        section {
            padding: 120px 0;
            position: relative;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-header {
            text-align: center;
            margin-bottom: 64px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--blue);
            text-transform: uppercase;
            letter-spacing: 3px;
            margin-bottom: 16px;
        }
        .section-label::before,
        .section-label::after {
            content: '';
            width: 24px;
            height: 1px;
            background: var(--blue);
            opacity: 0.3;
        }
        .section-title {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .section-title .gradient-text {
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 淡入动画 */
        .reveal {
            opacity: 0;
            transform: translateY(40px);
            transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .reveal-delay-1 { transition-delay: 0.1s; }
        .reveal-delay-2 { transition-delay: 0.2s; }
        .reveal-delay-3 { transition-delay: 0.3s; }
        .reveal-delay-4 { transition-delay: 0.4s; }
        .reveal-delay-5 { transition-delay: 0.5s; }

        /* ========== 关于我们 ========== */
        #about {
            background: var(--bg-blue-light);
        }
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
        }
        .about-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .about-text p {
            color: var(--text-secondary);
            margin-bottom: 16px;
            font-size: 1.05rem;
        }
        .about-text .highlight {
            color: var(--blue);
            font-weight: 500;
        }

        .about-visual {
            position: relative;
            display: flex;
            justify-content: center;
        }
        .about-grid-shape {
            width: 100%;
            max-width: 480px;
            aspect-ratio: 1;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-light);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            padding: 24px;
            position: relative;
            overflow: hidden;
        }
        .about-grid-shape::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(37,99,235,0.06), transparent 60%);
            transition: background 0.3s;
        }
        .stat-card {
            padding: 45px;
            text-align: center;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .stat-card::before {
            content: '';
            position: absolute;
            inset: 0;
            /* background: linear-gradient(to top,
                transparent 0%,
                rgba(255,255,255,0.1) 20%,
                rgba(255,255,255,0.5) 50%,
                rgba(255,255,255,0.85) 75%,
                rgba(255,255,255,0.95) 100%); */
            backdrop-filter: blur(3px);
            -webkit-backdrop-filter: blur(3px);
            pointer-events: none;
            z-index: 1;
        }
        .stat-card > * { position: relative; z-index: 2; }
        .stat-card:nth-child(1) {
            background-image: url('../images/stat-year.jpg');
        }
        .stat-card:nth-child(2) {
            background-image: url('../images/stat-clients.jpg');
        }
        .stat-card:nth-child(3) {
            background-image: url('../images/stat-projects.jpg');
        }
        .stat-card:nth-child(4) {
            background-image: url('../images/stat-cert.jpg');
        }
        .stat-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-card .number {
            font-size: 2.4rem;
            font-weight: 800;
            background: #fff;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-card .number .suffix { font-size: 1.2rem; }
        .stat-card .label {
            color: #fff;
            font-size: 0.9rem;
            margin-top: 4px;
        }

        /* ========== 解决方案 ========== */
        #solutions {
            background: var(--bg-primary);
        }
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .solution-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 40px 32px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
            cursor: pointer;
            perspective: 1000px;
            box-shadow: var(--shadow-sm);
        }
        .solution-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(37,99,235,0.04), transparent 60%);
            opacity: 0;
            transition: opacity 0.5s;
            pointer-events: none;
        }
        .solution-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-hover);
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .solution-card:hover::before { opacity: 1; }

        .solution-card::after {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
            opacity: 0;
            transition: opacity 0.6s ease;
            z-index: 0;
            border-radius: inherit;
        }
        .solution-card:hover::after { opacity: 1; }
        .solution-card > * { position: relative; z-index: 1; }

        /* ===== 1. 智慧党建 — 党旗红 · 金色星光 ===== */
        .solution-card:nth-child(1)::after {
            background:
                linear-gradient(135deg,
                    transparent 0%,
                    rgba(220,38,38,0.02) 30%,
                    rgba(220,38,38,0.06) 55%,
                    rgba(185,28,28,0.14) 80%,
                    rgba(153,27,27,0.20) 100%
                );
        }
        .solution-card:nth-child(1):hover {
            border-color: rgba(220,38,38,0.3);
        }

        /* ===== 2. 智慧团建 — 团旗蓝 · 青春辉映 ===== */
        .solution-card:nth-child(2)::after {
            background:
                linear-gradient(135deg,
                    transparent 0%,
                    rgba(37,99,235,0.02) 30%,
                    rgba(37,99,235,0.05) 55%,
                    rgba(29,78,216,0.12) 80%,
                    rgba(30,64,175,0.18) 100%
                );
        }
        .solution-card:nth-child(2):hover {
            border-color: rgba(37,99,235,0.3);
        }

        /* ===== 3. 智慧医养 — 生命绿 · 健康守护 ===== */
        .solution-card:nth-child(3)::after {
            background:
                linear-gradient(135deg,
                    transparent 0%,
                    rgba(8,145,178,0.02) 30%,
                    rgba(8,145,178,0.05) 55%,
                    rgba(6,148,162,0.12) 80%,
                    rgba(14,116,144,0.18) 100%
                );
        }
        .solution-card:nth-child(3):hover {
            border-color: rgba(8,145,178,0.3);
        }

        /* ===== 4. 智慧城管 — 城市蓝 · 智慧治理 ===== */
        .solution-card:nth-child(4)::after {
            background:
                /* 城市网格纹理 */
                repeating-linear-gradient(
                    0deg, transparent, transparent 38px,
                    rgba(37,99,235,0.025) 38px, rgba(37,99,235,0.025) 39px
                ),
                repeating-linear-gradient(
                    90deg, transparent, transparent 38px,
                    rgba(37,99,235,0.025) 38px, rgba(37,99,235,0.025) 39px
                ),
                linear-gradient(135deg,
                    transparent 0%,
                    rgba(37,99,235,0.02) 30%,
                    rgba(37,99,235,0.05) 55%,
                    rgba(37,99,235,0.12) 80%,
                    rgba(79,70,229,0.18) 100%
                );
        }
        .solution-card:nth-child(4):hover {
            border-color: rgba(37,99,235,0.3);
        }

        /* ===== 5. 智慧社区 — 家园绿 · 温馨社区 ===== */
        .solution-card:nth-child(5)::after {
            background:
                /* 圆点纹理，像社区房屋聚落 */
                radial-gradient(circle at 20% 80%, rgba(5,150,105,0.04) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(52,211,153,0.03) 0%, transparent 50%),
                linear-gradient(135deg,
                    transparent 0%,
                    rgba(5,150,105,0.02) 30%,
                    rgba(5,150,105,0.05) 55%,
                    rgba(5,150,105,0.12) 80%,
                    rgba(4,120,87,0.18) 100%
                );
        }
        .solution-card:nth-child(5):hover {
            border-color: rgba(5,150,105,0.3);
        }

        /* ===== 6. 党建展厅 — 金色厅 · 红色传承 ===== */
        .solution-card:nth-child(6)::after {
            background:
                /* 斜纹纹理，营造展厅灯光感 */
                repeating-linear-gradient(
                    -45deg,
                    transparent, transparent 20px,
                    rgba(217,119,6,0.02) 20px, rgba(217,119,6,0.02) 21px
                ),
                linear-gradient(135deg,
                    transparent 0%,
                    rgba(217,119,6,0.02) 30%,
                    rgba(217,119,6,0.05) 55%,
                    rgba(217,119,6,0.10) 80%,
                    rgba(180,83,9,0.16) 100%
                );
        }
        .solution-card:nth-child(6):hover {
            border-color: rgba(217,119,6,0.3);
        }

        .solution-card .icon-box {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(37, 99, 235, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--blue);
            margin-bottom: 20px;
            transition: all var(--transition);
        }
        .solution-card:hover .icon-box {
            background: var(--gradient-primary);
            color: white;
            transform: scale(1.05);
        }
        .solution-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .solution-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .solution-card .card-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            background: rgba(37, 99, 235, 0.08);
            color: var(--blue);
            margin-top: 16px;
            letter-spacing: 1px;
        }
        .solution-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            font-size: 14px;
            font-weight: 600;
            color: var(--blue);
            text-decoration: none;
            opacity: 0;
            transform: translateX(-10px);
            transition: all var(--transition);
        }
        .solution-card:hover .card-link {
            opacity: 1;
            transform: translateX(0);
        }
        .solution-card .card-link i { font-size: 12px; transition: transform 0.3s; }
        .solution-card .card-link:hover i { transform: translateX(4px); }

        /* ========== 核心优势 ========== */
        #advantages {
            background: var(--bg-blue-light);
        }
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
        }
        .advantage-card {
            text-align: center;
            padding: 40px 24px;
            border-radius: var(--radius-md);
            background: #ffffff;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .advantage-card:hover {
            background: #ffffff;
            transform: translateY(-6px);
        }
        .advantage-card > * { position: relative; z-index: 1; }

        /* ---- 5 cards ::before overlay ---- */
        .advantage-card::before {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
            opacity: 0;
            transition: opacity 0.6s ease;
            border-radius: inherit;
            z-index: 0;
        }
        .advantage-card:hover::before { opacity: 1; }

        /* 1. 专业团队 — 深蓝 · 网络节点 */
        .advantage-card:nth-child(1)::before {
            background:
                radial-gradient(circle at 20% 25%, rgba(37,99,235,0.08) 0%, transparent 50%),
                radial-gradient(circle at 85% 75%, rgba(99,102,241,0.05) 0%, transparent 45%),
                radial-gradient(circle at 50% 50%, rgba(37,99,235,0.03) 0%, transparent 70%);
        }
        .advantage-card:nth-child(1):hover {
            border-color: rgba(37,99,235,0.3);
            box-shadow: 0 8px 32px rgba(37,99,235,0.12);
        }

        /* 2. 技术创新 — 科技青 · 电路网格 */
        .advantage-card:nth-child(2)::before {
            background:
                repeating-linear-gradient(0deg, transparent, transparent 28px, rgba(8,145,178,0.025) 28px, rgba(8,145,178,0.025) 29px),
                repeating-linear-gradient(90deg, transparent, transparent 28px, rgba(8,145,178,0.025) 28px, rgba(8,145,178,0.025) 29px),
                radial-gradient(circle at 30% 70%, rgba(8,145,178,0.06) 0%, transparent 40%),
                radial-gradient(circle at 70% 30%, rgba(6,182,212,0.04) 0%, transparent 40%);
        }
        .advantage-card:nth-child(2):hover {
            border-color: rgba(8,145,178,0.3);
            box-shadow: 0 8px 32px rgba(8,145,178,0.12);
        }

        /* 3. 安全可靠 — 守护红 · 盾牌光晕 */
        .advantage-card:nth-child(3)::before {
            background:
                radial-gradient(ellipse at 50% 80%, rgba(220,38,38,0.06) 0%, transparent 55%),
                radial-gradient(circle at 50% 25%, rgba(239,68,68,0.03) 0%, transparent 40%),
                radial-gradient(circle at 50% 50%, rgba(220,38,38,0.02) 0%, transparent 60%);
        }
        .advantage-card:nth-child(3):hover {
            border-color: rgba(220,38,38,0.3);
            box-shadow: 0 8px 32px rgba(220,38,38,0.12);
        }

        /* 4. 定制服务 — 金色 · 优雅交织 */
        .advantage-card:nth-child(4)::before {
            background:
                repeating-linear-gradient(-45deg, transparent, transparent 12px, rgba(217,119,6,0.015) 12px, rgba(217,119,6,0.015) 13px),
                repeating-linear-gradient(45deg, transparent, transparent 12px, rgba(217,119,6,0.015) 12px, rgba(217,119,6,0.015) 13px),
                radial-gradient(circle at 50% 50%, rgba(217,119,6,0.04) 0%, transparent 50%);
        }
        .advantage-card:nth-child(4):hover {
            border-color: rgba(217,119,6,0.3);
            box-shadow: 0 8px 32px rgba(217,119,6,0.12);
        }

        /* 5. 贴心支持 — 温暖蓝 · 关怀涟漪 */
        .advantage-card:nth-child(5)::before {
            background:
                radial-gradient(circle at 25% 40%, rgba(37,99,235,0.06) 0%, transparent 35%),
                radial-gradient(circle at 75% 60%, rgba(59,130,246,0.04) 0%, transparent 35%),
                radial-gradient(circle at 50% 50%, rgba(37,99,235,0.02) 0%, transparent 50%);
        }
        .advantage-card:nth-child(5):hover {
            border-color: rgba(37,99,235,0.3);
            box-shadow: 0 8px 32px rgba(37,99,235,0.12);
        }

        /* ---- icon hover 增强 ---- */
        .advantage-card .icon-wrap {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            transition: all 0.5s cubic-bezier(0.34,1.56,0.64,1);
            position: relative;
        }
        .advantage-card:nth-child(1) .icon-wrap { background: rgba(37,99,235,0.1); color: var(--blue); }
        .advantage-card:nth-child(2) .icon-wrap { background: rgba(8,145,178,0.1); color: var(--cyan); }
        .advantage-card:nth-child(3) .icon-wrap { background: rgba(220,38,38,0.1); color: var(--red); }
        .advantage-card:nth-child(4) .icon-wrap { background: rgba(217,119,6,0.1); color: var(--gold); }
        .advantage-card:nth-child(5) .icon-wrap { background: rgba(37,99,235,0.1); color: var(--blue); }
        .advantage-card:hover .icon-wrap {
            transform: scale(1.18) rotate(8deg);
            box-shadow: 0 0 30px rgba(37,99,235,0.15);
        }
        .advantage-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .advantage-card p {
            color: var(--text-secondary);
            font-size: 0.92rem;
        }

        /* ========== 案例展示 ========== */
        #cases {
            background: var(--bg-primary);
        }
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .case-card {
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
            aspect-ratio: 16/11;
            cursor: pointer;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .case-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .case-bg {
            position: absolute;
            inset: 0;
            transition: transform 0.6s;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .case-card:hover .case-bg { transform: scale(1.05); }
        .case-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.1) 60%, transparent 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 28px;
        }
        .case-overlay .case-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            background: rgba(37,99,235,0.2);
            color: #93c5fd;
            margin-bottom: 10px;
            align-self: flex-start;
            border: 1px solid rgba(37,99,235,0.2);
        }
        .case-overlay h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: #ffffff;
        }
        .case-overlay p {
            font-size: 0.88rem;
            color: rgba(255,255,255,0.7);
        }
        .case-card:nth-child(1) .case-bg {
            background-image: linear-gradient(135deg, rgba(30,58,95,0.5), rgba(13,33,55,0.5)),
                        url('../images/case-dangjian.jpg');
        }
        .case-card:nth-child(2) .case-bg {
            background-image: linear-gradient(135deg, rgba(95,30,30,0.5), rgba(55,13,13,0.5)),
                        url('../images/case-shequ.jpg');
        }
        .case-card:nth-child(3) .case-bg {
            background-image: linear-gradient(135deg, rgba(30,95,58,0.5), rgba(13,55,33,0.5)),
                        url('../images/case-yiyang.jpg');
        }
        .case-card:nth-child(4) .case-bg {
            background-image: linear-gradient(135deg, rgba(58,30,95,0.5), rgba(33,13,55,0.5)),
                        url('../images/case-chengguan.jpg');
        }
        .case-card:nth-child(5) .case-bg {
            background-image: linear-gradient(135deg, rgba(95,74,30,0.5), rgba(55,45,13,0.5)),
                        url('../images/case-zhanting.jpg');
        }
        .case-card:nth-child(6) .case-bg {
            background-image: linear-gradient(135deg, rgba(30,74,95,0.5), rgba(13,45,55,0.5)),
                        url('../images/case-tuanjian.jpg');
        }

        .case-bg-pattern {
            position: absolute;
            inset: 0;
            opacity: 0.12;
            background-image:
                radial-gradient(circle at 20% 50%, rgba(255,255,255,0.15) 1px, transparent 1px),
                radial-gradient(circle at 80% 50%, rgba(255,255,255,0.15) 1px, transparent 1px);
            background-size: 40px 40px;
        }
        .case-bg-accent {
            position: absolute; border-radius: 50%; pointer-events: none;
            opacity: 0.08; filter: blur(60px);
        }
        .case-card:nth-child(1) .case-bg-accent {
            width: 300px; height: 300px;
            background: #93c5fd; top: -80px; right: -80px;
        }
        .case-card:nth-child(2) .case-bg-accent {
            width: 250px; height: 250px;
            background: #fbbf24; bottom: -60px; left: -60px;
        }
        .case-card:nth-child(3) .case-bg-accent {
            width: 280px; height: 280px;
            background: #22d3ee; top: -60px; left: -60px;
        }
        .case-card:nth-child(4) .case-bg-accent {
            width: 260px; height: 260px;
            background: #a78bfa; bottom: -80px; right: -80px;
        }
        .case-card:nth-child(5) .case-bg-accent {
            width: 240px; height: 240px;
            background: #fbbf24; top: -40px; right: -40px;
        }
        .case-card:nth-child(6) .case-bg-accent {
            width: 280px; height: 280px;
            background: #22d3ee; bottom: -80px; left: -80px;
        }

        /* ========== 版块底部链接按钮 ========== */
        .section-footer-link {
            text-align: center;
            margin-top: 48px;
        }
        .section-footer-link .btn-outline {
            background: transparent;
            color: var(--blue);
            border-color: var(--blue);
            padding: 12px 36px;
            font-size: 15px;
        }
        .section-footer-link .btn-outline:hover {
            background: var(--gradient-primary);
            color: #ffffff;
            border-color: transparent;
            box-shadow: var(--shadow-glow);
        }

        /* ========== 联系我们 ========== */
        #contact {
            background: var(--bg-primary);
        }
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: start;
        }
        .contact-info h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .contact-info > p {
            color: var(--text-secondary);
            margin-bottom: 32px;
        }
        .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            margin-bottom: 24px;
        }
        .contact-item .ci-icon {
            width: 44px;
            height: 44px;
            min-width: 44px;
            border-radius: 12px;
            background: rgba(37,99,235,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--blue);
            font-size: 16px;
        }
        .contact-item h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .contact-item p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 2%;
        }
        .form-group {
            position: relative;
            margin-bottom: 2%;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 16px 20px;
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 15px;
            font-family: inherit;
            transition: all var(--transition);
            outline: none;
            box-shadow: var(--shadow-sm);
        }
        .form-group textarea {
            min-height: 140px;
            resize: vertical;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--blue);
            box-shadow: 0 0 0 3px rgba(37,99,235,0.1), var(--shadow-sm);
        }
        .form-group input::placeholder,
        .form-group textarea::placeholder,
        .form-group select::placeholder {
            color: var(--text-muted);
        }
        .form-group select {
            appearance: none;
            cursor: pointer;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
        }
        .form-success {
            text-align: center;
            padding: 60px 20px;
        }
        .form-success h3 {
            font-size: 1.4rem;
            margin: 16px 0 8px;
            color: #059669;
        }
        .form-success p {
            color: var(--text-secondary);
            font-size: 1rem;
        }
        .form-submit {
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            background: var(--gradient-primary);
            color: white;
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            font-family: inherit;
            align-self: flex-start;
        }
        .form-submit:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }

        /* ========== Footer ========== */
        footer {
            background: #0451c4c5;
            padding: 64px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-text { color: #ffffff !important; }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.92rem;
            margin-top: 16px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.4);
            text-decoration: none;
            transition: all var(--transition);
            font-size: 14px;
        }
        .footer-social a:hover {
            background: var(--blue);
            color: white;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
            color: rgba(255, 255, 255, 0.9);
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            font-size: 0.9rem;
            margin-bottom: 8px;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: rgba(255, 255, 255, 0.9); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom p {
            color: rgba(255, 255, 255, 0.3);
            font-size: 0.85rem;
        }
        .footer-bottom-links {
            display: flex;
            gap: 24px;
        }
        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.3);
            text-decoration: none;
            font-size: 0.85rem;
            transition: color var(--transition);
        }
        .footer-bottom-links a:hover { color: rgba(255, 255, 255, 0.6); }

        /* ========== Back to Top ========== */
        .back-to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--gradient-primary);
            color: white;
            border: none;
            cursor: pointer;
            font-size: 18px;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            box-shadow: var(--shadow-glow);
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(37,99,235,0.4);
        }
        .back-to-top.over-footer {
            background: #ffffff;
            color: #2563eb;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
        }
        .back-to-top.over-footer:hover {
            box-shadow: 0 8px 30px rgba(0,0,0,0.25);
        }

        /* ========== 动画关键帧 ========== */
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        @keyframes fadeInDown {
            from { opacity: 0; transform: translateY(-20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        @keyframes scrollDot {
            0% { opacity: 1; transform: translateY(0); }
            100% { opacity: 0; transform: translateY(12px); }
        }
        @keyframes orbFloat {
            0%, 100% { transform: translate(0, 0) scale(1); }
            25% { transform: translate(30px, -30px) scale(1.05); }
            50% { transform: translate(-20px, 20px) scale(0.95); }
            75% { transform: translate(20px, 30px) scale(1.02); }
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .solutions-grid { grid-template-columns: repeat(2, 1fr); }
            .cases-grid { grid-template-columns: repeat(2, 1fr); }
            .about-grid { gap: 48px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .hide-mobile { display: none; }
            section { padding: 80px 0; }
            .nav-links {
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                min-height: 100vh;
                background-image: url('../images/bj_md.jpg');
                background-size: cover;
                background-position: center;
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                gap: 0;
                padding: 120px 40px 40px;
                border: none;
                box-shadow: none;
                z-index: 9998;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: transform 0.45s ease, opacity 0.45s ease, visibility 0s 0.45s;
                list-style: none;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
                transition: transform 0.45s ease, opacity 0.45s ease, visibility 0s;
            }
            .nav-links li {
                opacity: 1;
                transform: none;
                transition: none;
            }
            .nav-links a {
                font-size: 20px;
                font-weight: 500;
                padding: 10px 0;
                display: block;
                text-align: center;
                color: #333333 !important;
                letter-spacing: 3px;
                position: static;
                border-radius: 0;
                min-width: auto;
                transition: color 0.3s;
            }
            .nav-links a::before { display: none; }
            .nav-links a::after { display: none; }
            .nav-links a:hover { color: #ec621f !important; }
            .nav-links li:first-child a { color: #ec621f !important; }
            .navbar:not(.scrolled) .nav-links li:last-child a { color: #333333 !important; background: none !important; box-shadow: none !important; }
            .navbar:not(.scrolled) .nav-links li:last-child a:hover { color: #ec621f !important; }
            .nav-links li:last-child a { font-size: 20px !important; font-weight: 500 !important; padding: 10px 0 !important; border-radius: 0 !important; }
            .hamburger { display: flex; }

            .about-grid { grid-template-columns: 1fr; }
            .solutions-grid { grid-template-columns: 1fr; }
            .cases-grid { grid-template-columns: 1fr; }
            .contact-grid { grid-template-columns: 1fr; }
            .form-row { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }

            .hero-buttons { flex-direction: column; align-items: center; }
            .btn { width: 100%; max-width: 300px; justify-content: center; }
        }

        @media (max-width: 480px) {
            .section-header { margin-bottom: 40px; }
            .stat-card { padding: 16px; }
            .stat-card .number { font-size: 1.8rem; }
        }