/* roulang page: index */
:root {
            --primary: #FF5E1A;
            --primary-dark: #E54B0A;
            --primary-light: #FF8C42;
            --dark: #1A1A1C;
            --gray-bg: #F5F5F7;
            --yellow-accent: #FFC107;
            --green-accent: #00C49A;
            --text-main: #222222;
            --text-sub: #666666;
            --white: #FFFFFF;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--gray-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }

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

        input,
        textarea {
            font-family: inherit;
            outline: none;
            border: 1px solid #ddd;
            border-radius: 8px;
            padding: 12px 16px;
            font-size: 1rem;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
            width: 100%;
            background: #fff;
        }
        input:focus,
        textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 94, 26, 0.1);
        }

        /* 容器 */
        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航 */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: background 0.35s ease, box-shadow 0.35s ease;
            border-bottom: 1px solid transparent;
        }
        #header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }
        #header .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
            z-index: 1002;
            position: relative;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            flex-shrink: 0;
            background: linear-gradient(135deg, #FF5E1A 0%, #FF8C42 100%);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .logo-icon svg {
            width: 22px;
            height: 22px;
            fill: #fff;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 24px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-main);
            transition: all 0.25s ease;
            position: relative;
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(255, 94, 26, 0.06);
        }
        .nav-links a.nav-active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .nav-cta-btn {
            display: inline-block;
            padding: 10px 24px;
            border-radius: 50px;
            background: linear-gradient(135deg, #FF5E1A 0%, #FF8C42 100%);
            color: #fff !important;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            box-shadow: 0 4px 16px rgba(255, 94, 26, 0.3);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            box-shadow: 0 6px 24px rgba(255, 94, 26, 0.45);
            transform: translateY(-2px);
            color: #fff !important;
            background: linear-gradient(135deg, #FF5E1A 0%, #FF6E2C 100%) !important;
        }

        /* 汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1002;
            position: relative;
            background: none;
            border: none;
            padding: 8px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--dark);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* 移动端菜单 */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            z-index: 1001;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            padding: 40px 24px;
        }
        .mobile-menu.show {
            display: flex;
        }
        .mobile-menu a {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--dark);
            padding: 12px 24px;
            border-radius: 12px;
            transition: all 0.25s ease;
        }
        .mobile-menu a:hover,
        .mobile-menu a.nav-active {
            color: var(--primary);
            background: rgba(255, 94, 26, 0.06);
        }
        .mobile-menu .nav-cta-btn {
            font-size: 1.2rem;
            padding: 14px 36px;
            margin-top: 8px;
        }
        .mobile-close {
            position: absolute;
            top: 20px;
            right: 24px;
            font-size: 2rem;
            background: none;
            border: none;
            color: var(--dark);
            cursor: pointer;
            z-index: 1003;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }

        /* Hero */
        #hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            background-attachment: fixed;
            overflow: hidden;
        }
        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(0, 0, 0, 0.65) 0%, rgba(0, 0, 0, 0.2) 100%);
            z-index: 1;
        }
        #hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: repeating-linear-gradient(135deg,
                    transparent,
                    transparent 2px,
                    rgba(255, 255, 255, 0.015) 2px,
                    rgba(255, 255, 255, 0.015) 4px);
            z-index: 2;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 780px;
            padding: 0 24px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 700;
            line-height: 1.15;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: -0.02em;
        }
        .hero-content h1 .brand-highlight {
            color: var(--primary);
            position: relative;
            display: inline-block;
        }
        .hero-content h1 .brand-highlight::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            right: 0;
            height: 6px;
            background: rgba(255, 94, 26, 0.5);
            border-radius: 3px;
            z-index: -1;
        }
        .hero-subtitle {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            font-weight: 400;
            line-height: 1.6;
        }
        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .btn-primary {
            display: inline-block;
            padding: 14px 36px;
            border-radius: 50px;
            background: linear-gradient(135deg, #FF5E1A 0%, #FF8C42 100%);
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            transition: all 0.3s ease;
            box-shadow: 0 6px 28px rgba(255, 94, 26, 0.35);
            letter-spacing: 0.02em;
        }
        .btn-primary:hover {
            box-shadow: 0 10px 36px rgba(255, 94, 26, 0.5);
            transform: translateY(-3px);
        }
        .btn-outline {
            display: inline-block;
            padding: 14px 36px;
            border-radius: 50px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            border: 2px solid rgba(255, 255, 255, 0.7);
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
        }
        .btn-outline:hover {
            background: #fff;
            color: var(--dark);
            border-color: #fff;
        }

        /* 区块通用 */
        .section {
            padding: 100px 0;
            position: relative;
        }
        .section-label {
            display: inline-block;
            font-size: 0.875rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 16px;
            color: var(--dark);
            position: relative;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 48px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin: 16px auto 0;
        }
        .section-desc {
            text-align: center;
            color: var(--text-sub);
            max-width: 620px;
            margin: 0 auto 48px;
            font-size: 1.05rem;
            line-height: 1.7;
        }

        /* 服务区 */
        #services {
            background: #fff;
            margin-top: -40px;
            position: relative;
            z-index: 10;
            border-radius: 24px 24px 0 0;
            padding-top: 80px;
        }
        .services-wrapper {
            display: flex;
            gap: 48px;
            align-items: flex-start;
        }
        .services-sticky {
            position: sticky;
            top: 100px;
            width: 30%;
            flex-shrink: 0;
        }
        .services-sticky h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .services-sticky p {
            color: var(--text-sub);
            line-height: 1.7;
        }
        .services-list {
            width: 65%;
            flex-shrink: 0;
        }
        .service-accordion-item {
            border-bottom: 1px solid #eee;
            padding: 0;
            transition: all 0.3s ease;
        }
        .service-accordion-header {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 20px 8px;
            cursor: pointer;
            transition: all 0.25s ease;
            border-radius: 8px;
        }
        .service-accordion-header:hover {
            background: rgba(255, 94, 26, 0.03);
        }
        .service-number {
            font-family: 'Outfit', 'Inter', system-ui, sans-serif;
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            min-width: 56px;
            text-align: center;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .service-accordion-header:hover .service-number {
            transform: scale(1.2);
        }
        .service-info h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 4px;
        }
        .service-info .service-short {
            font-size: 0.9rem;
            color: var(--text-sub);
            margin: 0;
        }
        .service-accordion-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s ease, padding 0.5s ease;
            padding: 0 8px 0 80px;
        }
        .service-accordion-item.open .service-accordion-body {
            max-height: 350px;
            padding: 0 8px 24px 80px;
        }
        .service-accordion-body-inner {
            display: flex;
            gap: 24px;
            align-items: flex-start;
            flex-wrap: wrap;
        }
        .service-accordion-body img {
            width: 180px;
            height: 120px;
            object-fit: cover;
            border-radius: 10px;
            flex-shrink: 0;
        }
        .service-accordion-body .service-detail {
            flex: 1;
            min-width: 200px;
            color: var(--text-sub);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .service-accordion-toggle {
            margin-left: auto;
            font-size: 1.5rem;
            color: #ccc;
            transition: transform 0.35s ease;
            flex-shrink: 0;
        }
        .service-accordion-item.open .service-accordion-toggle {
            transform: rotate(45deg);
            color: var(--primary);
        }

        /* 数据区 */
        #stats {
            background: var(--dark);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        #stats::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(255, 94, 26, 0.12) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(255, 193, 7, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }
        #stats .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 1;
        }
        .stat-item {
            text-align: center;
            padding: 24px;
        }
        .stat-number {
            font-family: 'Outfit', 'Inter', system-ui, sans-serif;
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 8px;
        }
        .stat-number .stat-suffix {
            font-size: 1.6rem;
            color: var(--yellow-accent);
        }
        .stat-label {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 400;
        }
        #stats .stats-decoration {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent 0%, var(--primary) 30%, var(--yellow-accent) 50%, var(--primary) 70%, transparent 100%);
            z-index: 2;
        }

        /* 案例区 */
        #cases {
            background: #fff;
        }
        .cases-grid {
            display: grid;
            grid-template-columns: 1fr 1.15fr 1fr;
            gap: 28px;
            align-items: start;
        }
        .case-card {
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            transition: all 0.4s ease;
            position: relative;
        }
        .case-card:nth-child(odd) {
            transform: rotate(0.5deg);
        }
        .case-card:nth-child(2) {
            transform: scale(1.05);
            box-shadow: 0 14px 40px rgba(0, 0, 0, 0.12);
            z-index: 2;
            position: relative;
        }
        .case-card:hover {
            transform: translateY(-8px) rotate(0deg);
            box-shadow: 0 12px 40px rgba(255, 94, 26, 0.15);
        }
        .case-card:nth-child(2):hover {
            transform: translateY(-8px) scale(1.05);
            box-shadow: 0 18px 48px rgba(255, 94, 26, 0.2);
        }
        .case-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .case-card-body {
            padding: 20px;
        }
        .case-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(255, 94, 26, 0.1);
            color: var(--primary);
            letter-spacing: 0.03em;
            margin-bottom: 10px;
        }
        .case-card-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 6px;
        }
        .case-card-body p {
            font-size: 0.9rem;
            color: var(--text-sub);
            line-height: 1.6;
        }
        .case-card .case-progress {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: #eee;
            transition: all 0.4s ease;
        }
        .case-card .case-progress::after {
            content: '';
            display: block;
            height: 100%;
            width: 0;
            background: var(--primary);
            transition: width 0.5s ease;
        }
        .case-card:hover .case-progress::after {
            width: 100%;
        }

        /* 解决方案 */
        #solutions {
            background: var(--gray-bg);
        }
        .solution-row {
            display: flex;
            gap: 48px;
            align-items: center;
            margin-bottom: 72px;
            flex-wrap: wrap;
        }
        .solution-row:last-child {
            margin-bottom: 0;
        }
        .solution-row.reverse {
            flex-direction: row-reverse;
        }
        .solution-img-wrap {
            flex: 1;
            min-width: 300px;
            position: relative;
            overflow: hidden;
            border-radius: 16px;
            clip-path: polygon(4% 0%, 100% 0%, 96% 100%, 0% 100%);
        }
        .solution-img-wrap img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            border-radius: 16px;
        }
        .solution-text {
            flex: 1;
            min-width: 280px;
        }
        .solution-text h3 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 16px;
        }
        .solution-text ul {
            list-style: none;
            padding: 0;
            margin-bottom: 20px;
        }
        .solution-text ul li {
            padding: 8px 0 8px 28px;
            position: relative;
            color: var(--text-sub);
            line-height: 1.7;
        }
        .solution-text ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 16px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
        }
        .solution-link {
            display: inline-block;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: color 0.25s ease;
            letter-spacing: 0.02em;
        }
        .solution-link:hover {
            color: var(--primary-dark);
        }
        .solution-link::after {
            content: ' →';
            transition: margin 0.25s ease;
        }
        .solution-link:hover::after {
            margin-left: 6px;
        }

        /* FAQ */
        #faq {
            background: #fff;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            margin-bottom: 8px;
            border-radius: 12px;
            background: var(--gray-bg);
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
        }
        .faq-item:nth-child(even) {
            background: #fff;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--dark);
            transition: all 0.25s ease;
            position: relative;
        }
        .faq-question::before {
            content: '';
            width: 3px;
            height: 20px;
            background: var(--primary);
            border-radius: 2px;
            flex-shrink: 0;
            transition: height 0.35s ease;
        }
        .faq-item.open .faq-question::before {
            height: 36px;
            background: var(--primary);
            box-shadow: 0 0 12px rgba(255, 94, 26, 0.4);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.45s ease;
            padding: 0 24px 0 60px;
            color: var(--text-sub);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 220px;
            padding: 0 24px 20px 60px;
        }
        .faq-toggle-icon {
            margin-left: auto;
            font-size: 1.3rem;
            color: #bbb;
            transition: transform 0.35s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-toggle-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }

        /* 联系 */
        #contact {
            background: var(--gray-bg);
        }
        .contact-wrapper {
            display: flex;
            gap: 48px;
            align-items: flex-start;
            flex-wrap: wrap;
        }
        .contact-info {
            flex: 1;
            min-width: 280px;
        }
        .contact-info h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 16px;
        }
        .contact-info p {
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 8px;
        }
        .contact-info .contact-detail {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 8px;
            color: var(--dark);
            font-weight: 500;
        }
        .contact-info .contact-detail .contact-icon {
            width: 36px;
            height: 36px;
            background: rgba(255, 94, 26, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--primary);
            font-size: 1rem;
        }
        .contact-form-wrap {
            flex: 1;
            min-width: 300px;
            background: #fff;
            padding: 32px;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
        }
        .contact-form-wrap .form-row {
            margin-bottom: 16px;
        }
        .contact-form-wrap textarea {
            resize: vertical;
            min-height: 100px;
        }
        .btn-submit {
            display: inline-block;
            width: 100%;
            padding: 14px 28px;
            border-radius: 50px;
            background: linear-gradient(135deg, #FF5E1A 0%, #FF8C42 100%);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 16px rgba(255, 94, 26, 0.3);
            letter-spacing: 0.03em;
        }
        .btn-submit:hover {
            box-shadow: 0 8px 28px rgba(255, 94, 26, 0.45);
            transform: translateY(-2px);
        }

        /* 页脚 */
        #footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            color: #fff;
            font-weight: 600;
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            transition: color 0.25s ease;
            font-size: 0.9rem;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-logo {
            font-weight: 700;
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-social-icons {
            display: flex;
            gap: 12px;
            margin-top: 12px;
        }
        .footer-social-icons .social-dot {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            cursor: pointer;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
        }
        .footer-social-icons .social-dot:hover {
            background: var(--primary);
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* 动画 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        @keyframes pulseGlow {
            0%,
            100% {
                box-shadow: 0 0 20px rgba(255, 94, 26, 0.3);
            }
            50% {
                box-shadow: 0 0 45px rgba(255, 94, 26, 0.55);
            }
        }
        @keyframes speedLine {
            0% {
                transform: translateX(-100%);
                opacity: 0;
            }
            50% {
                opacity: 0.6;
            }
            100% {
                transform: translateX(200%);
                opacity: 0;
            }
        }
        .animate-fade-in-up {
            animation: fadeInUp 0.7s ease forwards;
        }
        .animate-delay-1 {
            animation-delay: 0.15s;
        }
        .animate-delay-2 {
            animation-delay: 0.3s;
        }
        .animate-delay-3 {
            animation-delay: 0.45s;
        }
        .pulse-glow {
            animation: pulseGlow 2.5s ease-in-out infinite;
        }
        .speed-line {
            position: absolute;
            width: 120px;
            height: 1px;
            background: rgba(255, 255, 255, 0.5);
            animation: speedLine 3s linear infinite;
            pointer-events: none;
            z-index: 2;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .services-wrapper {
                flex-direction: column;
                gap: 32px;
            }
            .services-sticky {
                position: relative;
                top: auto;
                width: 100%;
                text-align: center;
            }
            .services-list {
                width: 100%;
            }
            .cases-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .case-card:nth-child(odd) {
                transform: none;
            }
            .case-card:nth-child(2) {
                transform: none;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            }
            .case-card:nth-child(2):hover {
                transform: translateY(-8px);
                box-shadow: 0 12px 40px rgba(255, 94, 26, 0.15);
            }
            .case-card:nth-child(3) {
                grid-column: span 2;
                max-width: 400px;
                justify-self: center;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .hero-content h1 {
                font-size: 2.8rem;
            }
            .section-title {
                font-size: 1.9rem;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .hero-content h1 {
                font-size: 2.3rem;
            }
            .hero-subtitle {
                font-size: 1.05rem;
            }
            .hero-btns {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                max-width: 320px;
                text-align: center;
            }
            .section {
                padding: 60px 0;
            }
            #services {
                margin-top: -20px;
                padding-top: 50px;
                border-radius: 16px 16px 0 0;
            }
            .cases-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .case-card:nth-child(3) {
                grid-column: span 1;
                max-width: 100%;
            }
            .case-card:nth-child(odd) {
                transform: none;
            }
            .case-card:nth-child(2) {
                transform: none;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-number {
                font-size: 2.2rem;
            }
            .stat-number .stat-suffix {
                font-size: 1.2rem;
            }
            .solution-row,
            .solution-row.reverse {
                flex-direction: column;
                gap: 24px;
            }
            .solution-img-wrap {
                clip-path: none;
                border-radius: 12px;
            }
            .solution-img-wrap img {
                height: 220px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .contact-wrapper {
                flex-direction: column;
                gap: 28px;
            }
            .service-accordion-body-inner {
                flex-direction: column;
            }
            .service-accordion-body img {
                width: 100%;
                height: 160px;
            }
            .service-accordion-body {
                padding: 0 8px 0 40px;
            }
            .service-accordion-item.open .service-accordion-body {
                padding: 0 8px 20px 40px;
            }
            .faq-answer {
                padding: 0 16px 0 40px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 18px 40px;
            }
            .faq-question {
                padding: 16px;
                font-size: 0.95rem;
            }
            #hero {
                background-attachment: scroll;
                min-height: 90vh;
            }
        }
        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.9rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .section-title {
                font-size: 1.55rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .stat-label {
                font-size: 0.85rem;
            }
            .section {
                padding: 44px 0;
            }
            #services {
                margin-top: -12px;
                padding-top: 36px;
            }
            .service-number {
                font-size: 1.6rem;
                min-width: 40px;
            }
            .service-info h3 {
                font-size: 1.05rem;
            }
            .contact-form-wrap {
                padding: 20px;
            }
            #header {
                height: 60px;
            }
            .logo-link {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
            }
        }