/* roulang page: index */
:root {
            --bg-deep: #0B0E1A;
            --bg-purple: #1A0F2E;
            --cyan: #00F0FF;
            --purple: #C724E0;
            --gold: #FFD100;
            --white: #ffffff;
            --white-70: rgba(255, 255, 255, 0.7);
            --white-50: rgba(255, 255, 255, 0.5);
            --white-08: rgba(255, 255, 255, 0.08);
            --white-03: rgba(255, 255, 255, 0.03);
            --glass-bg: rgba(255, 255, 255, 0.03);
            --glass-border: rgba(255, 255, 255, 0.08);
            --radius: 20px;
            --radius-sm: 12px;
            --shadow-cyan: 0 0 20px rgba(0, 240, 255, 0.5);
            --shadow-cyan-lg: 0 0 40px rgba(0, 240, 255, 0.8);
            --shadow-purple: 0 0 20px rgba(199, 36, 224, 0.4);
            --font-stack: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-stack);
            background: var(--bg-deep);
            color: var(--white);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            background-image:
                radial-gradient(ellipse at 20% 20%, rgba(0, 240, 255, 0.04) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 60%, rgba(199, 36, 224, 0.05) 0%, transparent 60%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 240, 255, 0.03) 0%, transparent 50%);
            background-attachment: fixed;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        input,
        textarea {
            font-family: inherit;
        }

        /* 全局网格背景 */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
            background-size: 60px 60px;
            opacity: 0.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* ============ 导航 ============ */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 15, 30, 0.7);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            transition: all 0.3s ease;
        }
        #header.scrolled {
            background: rgba(10, 15, 30, 0.9);
            border-bottom-color: rgba(0, 240, 255, 0.3);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 900;
            color: #fff;
            letter-spacing: 0.04em;
            white-space: nowrap;
            z-index: 1001;
        }
        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon svg {
            width: 100%;
            height: 100%;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            padding: 8px 4px;
            position: relative;
            letter-spacing: 0.02em;
            transition: color 0.3s ease;
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--cyan);
            border-radius: 2px;
            transition: width 0.3s ease;
            box-shadow: 0 0 8px var(--cyan);
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--cyan);
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        /* 汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            z-index: 1001;
            background: none;
            border: none;
            padding: 6px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
            background: var(--cyan);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
            background: var(--cyan);
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(10, 15, 30, 0.95);
            backdrop-filter: blur(30px);
            -webkit-backdrop-filter: blur(30px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }
        .mobile-nav-panel.open {
            opacity: 1;
            pointer-events: all;
        }
        .mobile-nav-panel a {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.04em;
            transition: color 0.3s ease;
        }
        .mobile-nav-panel a:hover {
            color: var(--cyan);
        }

        /* ============ Hero ============ */
        #hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            padding-top: var(--nav-height);
        }
        #hero .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            filter: brightness(0.35) saturate(0.8);
        }
        #hero .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(180deg, rgba(11, 14, 26, 0.5) 0%, rgba(11, 14, 26, 0.85) 60%, rgba(11, 14, 26, 0.95) 100%);
        }
        #hero .hero-particles {
            position: absolute;
            inset: 0;
            z-index: 2;
            pointer-events: none;
            opacity: 0.5;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 800px;
            padding: 0 24px;
        }
        .hero-content h1 {
            font-size: 56px;
            font-weight: 900;
            letter-spacing: 0.02em;
            margin: 0 0 20px;
            color: #fff;
            text-shadow:
                0 0 40px rgba(0, 240, 255, 0.6),
                0 0 80px rgba(0, 240, 255, 0.3),
                0 0 120px rgba(199, 36, 224, 0.3);
            line-height: 1.2;
        }
        .hero-content .hero-subtitle {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.8);
            margin: 0 0 40px;
            letter-spacing: 0.04em;
            font-weight: 400;
            line-height: 1.6;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .btn-primary {
            display: inline-block;
            background: linear-gradient(135deg, #00F0FF, #C724E0);
            color: #fff;
            padding: 14px 36px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.04em;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
            transition: all 0.35s ease;
            cursor: pointer;
            border: none;
            text-align: center;
        }
        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.8), 0 0 60px rgba(199, 36, 224, 0.4);
            transform: translateY(-2px) scale(1.03);
            color: #fff;
        }
        .btn-outline {
            display: inline-block;
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.04em;
            border: 2px solid var(--purple);
            transition: all 0.35s ease;
            cursor: pointer;
            text-align: center;
            box-shadow: 0 0 10px rgba(199, 36, 224, 0.2);
        }
        .btn-outline:hover {
            background: rgba(199, 36, 224, 0.2);
            border-color: var(--cyan);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }
        .hero-scroll-indicator {
            position: absolute;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 3;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            animation: bounceDown 2s ease-in-out infinite;
        }
        .hero-scroll-indicator .arrow-down {
            width: 0;
            height: 0;
            border-left: 10px solid transparent;
            border-right: 10px solid transparent;
            border-top: 14px solid var(--cyan);
            filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.8));
        }
        .hero-scroll-indicator .arrow-down:nth-child(2) {
            opacity: 0.6;
            margin-top: -2px;
        }
        .hero-scroll-indicator .arrow-down:nth-child(3) {
            opacity: 0.3;
            margin-top: -2px;
        }
        @keyframes bounceDown {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(12px);
            }
        }

        /* ============ 板块通用 ============ */
        .section {
            padding: 100px 0;
            position: relative;
            z-index: 1;
        }
        .section-title {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            text-align: center;
            margin: 0 0 16px;
            letter-spacing: 0.03em;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            margin: 14px auto 0;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--cyan), var(--purple));
        }
        .section-subtitle {
            text-align: center;
            color: var(--white-70);
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto 50px;
            letter-spacing: 0.02em;
        }

        /* ============ 服务 ============ */
        #services {
            background: transparent;
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 28px 24px;
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.06);
            transition: all 0.4s ease;
            display: flex;
            gap: 18px;
            align-items: flex-start;
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.04) 0%, transparent 70%);
            opacity: 0;
            transition: opacity 0.4s ease;
            pointer-events: none;
        }
        .service-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: 0 8px 40px rgba(0, 240, 255, 0.18), 0 0 60px rgba(199, 36, 224, 0.08);
            transform: translateY(-4px);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-card .svc-icon {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            font-size: 24px;
            color: var(--cyan);
        }
        .service-card .svc-info h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 8px;
            letter-spacing: 0.02em;
        }
        .service-card .svc-info p {
            font-size: 14px;
            color: var(--white-70);
            margin: 0;
            line-height: 1.7;
        }
        .service-card .svc-link {
            display: inline-block;
            margin-top: 10px;
            font-size: 13px;
            color: var(--cyan);
            font-weight: 500;
            letter-spacing: 0.03em;
            transition: color 0.3s;
        }
        .service-card .svc-link:hover {
            color: #fff;
        }

        /* ============ 数据优势 ============ */
        #advantages {
            background: linear-gradient(180deg, transparent 0%, rgba(26, 15, 46, 0.5) 40%, rgba(26, 15, 46, 0.5) 60%, transparent 100%);
            position: relative;
            overflow: hidden;
        }
        #advantages::before {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
            background:
                repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(0, 240, 255, 0.015) 40px, rgba(0, 240, 255, 0.015) 41px),
                repeating-linear-gradient(90deg, transparent, transparent 40px, rgba(199, 36, 224, 0.01) 40px, rgba(199, 36, 224, 0.01) 41px);
            z-index: 0;
        }
        .advantages-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            position: relative;
            z-index: 1;
        }
        .adv-item {
            text-align: center;
            padding: 20px;
        }
        .adv-number {
            font-size: 64px;
            font-weight: 900;
            letter-spacing: 0.02em;
            background: linear-gradient(135deg, var(--cyan), var(--purple));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            line-height: 1.2;
            margin-bottom: 4px;
            filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.5));
        }
        .adv-label {
            font-size: 17px;
            font-weight: 600;
            color: #fff;
            letter-spacing: 0.03em;
            margin-bottom: 6px;
        }
        .adv-desc {
            font-size: 14px;
            color: var(--white-50);
            letter-spacing: 0.02em;
        }
        .adv-icon-arrow {
            display: inline-block;
            font-size: 18px;
            color: var(--cyan);
            margin-right: 6px;
            animation: floatUp 2s ease-in-out infinite;
        }
        @keyframes floatUp {
            0%,
            100% {
                transform: translateY(0);
                opacity: 0.7;
            }
            50% {
                transform: translateY(-6px);
                opacity: 1;
            }
        }

        /* ============ 案例 ============ */
        #cases {
            background: transparent;
        }
        .cases-grid {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .case-card {
            display: flex;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            overflow: hidden;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.05);
            transition: all 0.4s ease;
        }
        .case-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: 0 8px 40px rgba(0, 240, 255, 0.15);
            transform: translateY(-3px);
        }
        .case-card .case-img-wrap {
            flex: 0 0 380px;
            overflow: hidden;
            position: relative;
        }
        .case-card .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease, filter 0.5s ease;
        }
        .case-card:hover .case-img-wrap img {
            transform: scale(1.06);
            filter: brightness(1.2);
        }
        .case-card .case-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(11, 14, 26, 0.7) 100%);
            pointer-events: none;
        }
        .case-card .case-info {
            flex: 1;
            padding: 28px 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .case-card .case-info h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 10px;
            letter-spacing: 0.02em;
        }
        .case-card .case-info p {
            font-size: 15px;
            color: var(--white-70);
            margin: 0 0 14px;
            line-height: 1.7;
        }
        .case-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: rgba(0, 240, 255, 0.12);
            color: var(--cyan);
            border: 1px solid rgba(0, 240, 255, 0.3);
            width: fit-content;
        }

        /* ============ 方案 ============ */
        #solutions {
            background: transparent;
        }
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .solution-card {
            background: rgba(20, 20, 40, 0.5);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            padding: 24px 24px 24px 28px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            position: relative;
            border-left: 4px solid transparent;
            border-image: linear-gradient(180deg, var(--cyan), var(--purple)) 1;
            transition: all 0.4s ease;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .solution-card:hover {
            border-color: rgba(0, 240, 255, 0.35);
            box-shadow: 0 8px 36px rgba(0, 240, 255, 0.12);
            transform: translateY(-3px);
            background: rgba(25, 25, 50, 0.6);
        }
        .solution-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 8px;
            letter-spacing: 0.02em;
        }
        .solution-card p {
            font-size: 14px;
            color: var(--white-70);
            margin: 0 0 10px;
            line-height: 1.7;
        }
        .solution-card .sol-icons {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .sol-icon-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 8px var(--cyan);
            flex-shrink: 0;
        }

        /* ============ FAQ ============ */
        #faq {
            background: transparent;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--glass-bg);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            transition: all 0.3s ease;
        }
        .faq-item.open {
            border-color: rgba(0, 240, 255, 0.35);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.08);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 20px;
            background: none;
            border: none;
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.02em;
            cursor: pointer;
            text-align: left;
            transition: color 0.3s ease;
            font-family: var(--font-stack);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 18px;
            color: var(--cyan);
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-question {
            color: var(--cyan);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(90deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            background: rgba(0, 240, 255, 0.03);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px 52px;
        }
        .faq-answer p {
            margin: 0;
            font-size: 15px;
            color: var(--white-70);
            line-height: 1.8;
        }
        .faq-answer strong {
            color: var(--cyan);
            font-weight: 600;
        }

        /* ============ CTA ============ */
        #contact {
            position: relative;
            overflow: hidden;
            background: linear-gradient(180deg, var(--bg-deep) 0%, var(--dark-purple) 50%, var(--bg-deep) 100%);
        }
        #contact::before {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 0;
            background:
                radial-gradient(ellipse at 30% 50%, rgba(0, 240, 255, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 40%, rgba(199, 36, 224, 0.07) 0%, transparent 60%);
        }
        .cta-content {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .cta-content h2 {
            font-size: 36px;
            font-weight: 900;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.03em;
            text-shadow: 0 0 30px rgba(0, 240, 255, 0.4);
        }
        .cta-content .cta-sub {
            font-size: 17px;
            color: var(--white-70);
            margin: 0 0 32px;
            letter-spacing: 0.02em;
        }
        .cta-contact-info {
            margin-top: 24px;
            font-size: 14px;
            color: var(--white-50);
            letter-spacing: 0.02em;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
        }
        .cta-contact-info span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .cta-contact-info .cta-icon-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 8px var(--cyan);
            flex-shrink: 0;
        }

        /* ============ 页脚 ============ */
        #footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 50px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 900;
            color: #fff;
            letter-spacing: 0.04em;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--white-50);
            line-height: 1.7;
            margin: 0;
        }
        .footer-links h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.03em;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--white-50);
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: var(--cyan);
        }
        .footer-contact h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.03em;
        }
        .footer-contact p {
            font-size: 14px;
            color: var(--white-50);
            margin: 0 0 6px;
            line-height: 1.7;
        }
        .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 10px;
        }
        .footer-social .soc-dot {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            cursor: pointer;
            font-size: 14px;
            color: var(--white-50);
        }
        .footer-social .soc-dot:hover {
            background: rgba(0, 240, 255, 0.15);
            border-color: var(--cyan);
            color: var(--cyan);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: var(--white-50);
            letter-spacing: 0.03em;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .solutions-grid {
                grid-template-columns: 1fr 1fr;
            }
            .case-card .case-img-wrap {
                flex: 0 0 260px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav-panel {
                display: flex;
            }
            #hero .hero-content h1 {
                font-size: 38px;
            }
            .hero-content .hero-subtitle {
                font-size: 17px;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 28px;
            }
            .services-grid {
                grid-template-columns: 1fr;
            }
            .advantages-row {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .adv-number {
                font-size: 48px;
            }
            .case-card {
                flex-direction: column;
            }
            .case-card .case-img-wrap {
                flex: 0 0 auto;
                height: 220px;
            }
            .solutions-grid {
                grid-template-columns: 1fr;
            }
            .cta-content h2 {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .btn-primary,
            .btn-outline {
                padding: 12px 28px;
                font-size: 15px;
            }
            #hero {
                min-height: 90vh;
            }
        }
        @media (max-width: 520px) {
            #hero .hero-content h1 {
                font-size: 30px;
            }
            .hero-content .hero-subtitle {
                font-size: 15px;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            .section-title {
                font-size: 24px;
            }
            .case-card .case-img-wrap {
                height: 180px;
            }
            .cta-content h2 {
                font-size: 24px;
            }
            .cta-contact-info {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
            .container {
                padding: 0 16px;
            }
            .service-card {
                padding: 20px 16px;
            }
            .solution-card {
                padding: 18px 16px 18px 20px;
            }
        }

        /* fade-up 动画 */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* 扫描线装饰 */
        .scan-line {
            position: absolute;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.5), transparent);
            pointer-events: none;
            animation: scanMove 4s linear infinite;
            opacity: 0.5;
        }
        @keyframes scanMove {
            0% {
                top: 0%;
            }
            100% {
                top: 100%;
            }
        }