/* roulang page: index */
:root {
            --deep-teal: #0F6B6B;
            --teal-hover: #0C5858;
            --teal-dark: #0A4B4B;
            --teal-deeper: #073838;
            --warm-gold: #D4A373;
            --gold-hover: #C6925D;
            --gold-light: #E8C9A8;
            --gray-green: #F4F7F6;
            --gray-green-dark: #E8EDEB;
            --soft-gray: #F9FAFB;
            --white: #FFFFFF;
            --border-light: #E5E7EB;
            --text-primary: #1a1a1a;
            --text-secondary: #4a4a4a;
            --text-muted: #6b7280;
            --text-light: #9ca3af;
            --radius-card: 12px;
            --radius-container: 16px;
            --radius-pill: 9999px;
            --radius-accordion: 8px;
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.05);
            --shadow-card-hover: 0 8px 28px rgba(0, 0, 0, 0.10);
            --shadow-metric: 0 2px 10px rgba(15, 107, 107, 0.06);
            --shadow-metric-hover: 0 8px 24px rgba(15, 107, 107, 0.12);
            --shadow-glow-gold: 0 4px 18px rgba(212, 163, 115, 0.35);
            --shadow-glow-teal: 0 4px 18px rgba(15, 107, 107, 0.30);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-content-width: 72ch;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 140px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: #1a1a1a;
            background-color: #FFFFFF;
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

        button,
        input,
        textarea {
            font-family: inherit;
        }

        .container-custom {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 768px) {
            .container-custom {
                padding-left: 32px;
                padding-right: 32px;
            }
        }
        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 40px;
                padding-right: 40px;
            }
        }

        /* 导航样式 */
        .nav-brand {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            color: var(--deep-teal);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .nav-brand .brand-line {
            display: inline-block;
            width: 3px;
            height: 22px;
            background: var(--warm-gold);
            border-radius: 2px;
            margin-right: 4px;
            flex-shrink: 0;
        }
        .nav-brand .brand-dot {
            display: inline-block;
            width: 6px;
            height: 6px;
            background: var(--warm-gold);
            border-radius: 50%;
            flex-shrink: 0;
            margin-left: 2px;
            animation: pulse-dot 2s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.6);
            }
        }

        .nav-top-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 16px;
        }
        .nav-tabs-row {
            border-top: 1px solid #E5E7EB;
            border-bottom: 1px solid #E5E7EB;
            background: #FAFBFA;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-tabs-row::-webkit-scrollbar {
            display: none;
        }
        .nav-tabs-inner {
            display: flex;
            gap: 4px;
            padding: 8px 0;
            white-space: nowrap;
            min-width: max-content;
        }
        .nav-pill {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 0.9rem;
            font-weight: 500;
            color: #6b7280;
            background: #F3F4F6;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
            border: 1.5px solid transparent;
            user-select: none;
        }
        .nav-pill:hover {
            color: var(--deep-teal);
            border-color: var(--deep-teal);
            background: #F0F7F7;
        }
        .nav-pill.active {
            background: var(--deep-teal);
            color: #FFFFFF;
            border-color: var(--deep-teal);
            font-weight: 600;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 11px 26px;
            background: var(--deep-teal);
            color: #FFFFFF;
            border: none;
            border-radius: var(--radius-card);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(15, 107, 107, 0.18);
            letter-spacing: 0.02em;
        }
        .btn-primary:hover {
            background: var(--teal-hover);
            box-shadow: var(--shadow-glow-teal);
            transform: scale(1.03);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 11px 26px;
            background: transparent;
            color: var(--deep-teal);
            border: 2px solid var(--deep-teal);
            border-radius: var(--radius-card);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .btn-outline:hover {
            background: var(--deep-teal);
            color: #FFFFFF;
            box-shadow: var(--shadow-glow-teal);
            transform: scale(1.03);
        }
        .btn-gold {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            background: var(--warm-gold);
            color: #FFFFFF;
            border: none;
            border-radius: var(--radius-card);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 2px 10px rgba(212, 163, 115, 0.25);
            letter-spacing: 0.02em;
        }
        .btn-gold:hover {
            background: var(--gold-hover);
            box-shadow: var(--shadow-glow-gold);
            transform: scale(1.03);
        }

        /* 汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 100;
            background: transparent;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--deep-teal);
            border-radius: 2px;
            transition: all var(--transition-smooth);
        }
        .hamburger.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 767px) {
            .hamburger {
                display: flex;
            }
            .nav-top-row .btn-primary.desktop-only {
                display: none;
            }
            .nav-top-row .search-icon-desktop {
                display: none;
            }
        }
        @media (min-width: 768px) {
            .hamburger {
                display: none;
            }
            .nav-top-row .btn-primary.mobile-only {
                display: none;
            }
        }

        .mobile-menu-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(255, 255, 255, 0.97);
            z-index: 90;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 16px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }
        .mobile-menu-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu-overlay a {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--deep-teal);
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
        }
        .mobile-menu-overlay a:hover {
            background: var(--gray-green);
        }

        /* Hero */
        .hero-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 580px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 107, 107, 0.72) 0%, rgba(7, 56, 56, 0.60) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 620px;
            padding: 60px 0;
        }
        .hero-decor {
            position: absolute;
            right: -40px;
            bottom: 40px;
            z-index: 1;
            opacity: 0.35;
            pointer-events: none;
        }
        .hero-decor .ring {
            width: 180px;
            height: 180px;
            border: 3px solid rgba(255, 255, 255, 0.5);
            border-radius: 50%;
            position: relative;
        }
        .hero-decor .ring::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 100%;
            width: 60px;
            height: 2px;
            background: rgba(255, 255, 255, 0.5);
            transform: translateY(-50%);
        }
        .hero-decor .ring::before {
            content: '';
            position: absolute;
            top: 100%;
            left: 50%;
            width: 2px;
            height: 50px;
            background: rgba(255, 255, 255, 0.5);
            transform: translateX(-50%);
        }
        @media (max-width: 767px) {
            .hero-section {
                min-height: 460px;
            }
            .hero-content {
                padding: 40px 0;
                max-width: 100%;
            }
            .hero-decor {
                right: -60px;
                bottom: 20px;
            }
            .hero-decor .ring {
                width: 120px;
                height: 120px;
            }
        }

        /* 指标看板 */
        .metric-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-metric);
            transition: all var(--transition-smooth);
            text-align: center;
            border: 1px solid #EEF1F0;
        }
        .metric-card:hover {
            box-shadow: var(--shadow-metric-hover);
            transform: translateY(-4px);
            border-color: var(--deep-teal);
        }
        .metric-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--deep-teal);
            letter-spacing: -0.02em;
            line-height: 1.1;
        }
        .metric-label {
            display: inline-block;
            margin-top: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--warm-gold);
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }
        .metric-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        @media (max-width: 767px) {
            .metric-number {
                font-size: 2.4rem;
            }
            .metric-card {
                padding: 22px 18px;
            }
        }

        /* 服务卡片 */
        .service-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            border: 1px solid #E5E7EB;
            padding: 28px 24px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            border-color: var(--deep-teal);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .service-card.featured {
            border-color: var(--deep-teal);
            background: linear-gradient(180deg, #FAFCFB 0%, #FFFFFF 100%);
            box-shadow: var(--shadow-metric);
        }
        .service-card .service-icon-img {
            width: 56px;
            height: 56px;
            border-radius: 10px;
            object-fit: cover;
            margin-bottom: 16px;
            border: 2px solid #EEF1F0;
        }
        .service-card .service-link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--deep-teal);
            margin-top: auto;
            padding-top: 12px;
            transition: gap var(--transition-fast);
        }
        .service-card .service-link-arrow:hover {
            gap: 8px;
            color: var(--teal-hover);
        }

        /* 对比表 */
        .compare-col-before {
            background: #F3F4F6;
            border-radius: var(--radius-container);
            padding: 32px 28px;
            border: 1px solid #E5E7EB;
        }
        .compare-col-after {
            background: #F0F7F6;
            border-radius: var(--radius-container);
            padding: 32px 28px;
            border: 2px solid var(--deep-teal);
            position: relative;
        }
        .compare-col-after::before {
            content: '✓';
            position: absolute;
            top: -16px;
            right: 24px;
            width: 36px;
            height: 36px;
            background: var(--deep-teal);
            color: #FFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.1rem;
        }
        .compare-item {
            padding: 10px 0;
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
            font-size: 0.95rem;
        }
        .compare-item:last-child {
            border-bottom: none;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid #E5E7EB;
        }
        .faq-item summary {
            padding: 18px 12px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: all var(--transition-fast);
            border-radius: var(--radius-accordion);
            color: #1a1a1a;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 300;
            color: var(--deep-teal);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
            margin-left: 12px;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: #F4F7F6;
        }
        .faq-item[open] summary {
            background: #F4F7F6;
            color: var(--deep-teal);
        }
        .faq-item[open] summary::after {
            transform: rotate(45deg);
            background: var(--deep-teal);
            color: #FFF;
        }
        .faq-item .faq-answer {
            padding: 4px 12px 18px 12px;
            color: #4a4a4a;
            line-height: 1.75;
            font-size: 0.95rem;
        }

        /* CTA深色段 */
        .cta-dark-section {
            background: var(--teal-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-dark-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 280px;
            height: 280px;
            border: 2px solid rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-dark-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 160px;
            height: 160px;
            border: 2px solid rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-input {
            width: 100%;
            padding: 13px 16px;
            border-radius: 10px;
            border: 2px solid transparent;
            background: #FFFFFF;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            color: #1a1a1a;
        }
        .cta-input:focus {
            outline: none;
            border-color: var(--deep-teal);
            box-shadow: 0 0 0 4px rgba(15, 107, 107, 0.10);
        }
        .cta-textarea {
            width: 100%;
            padding: 13px 16px;
            border-radius: 10px;
            border: 2px solid transparent;
            background: #FFFFFF;
            font-size: 0.95rem;
            resize: vertical;
            min-height: 100px;
            transition: all var(--transition-fast);
            color: #1a1a1a;
        }
        .cta-textarea:focus {
            outline: none;
            border-color: var(--deep-teal);
            box-shadow: 0 0 0 4px rgba(15, 107, 107, 0.10);
        }

        /* 页脚 */
        .footer-link {
            color: #6b7280;
            transition: color var(--transition-fast);
            font-size: 0.9rem;
        }
        .footer-link:hover {
            color: var(--deep-teal);
        }

@media (min-width:768px) {
                    #metrics .container-custom>div>div>div {
                        grid-template-columns:2fr 1fr;
                    }
                    #metrics .container-custom>div>div>div>div:first-child {
                        grid-row:span 2;
                    }
                }
                @media (min-width:1024px) {
                    #metrics .container-custom>div>div>div {
                        grid-template-columns:2.2fr 1fr 1.3fr;
                        gap: 24px;
                    }
                    #metrics .container-custom>div>div>div>div:first-child {
                        grid-row:span 2;
                    }
                    #metrics .container-custom>div>div>div>div:nth-child(2) {
                        grid-column:2;
                    }
                    #metrics .container-custom>div>div>div>div:nth-child(3) {
                        grid-column:3;
                        grid-row:1/3;
                        display:flex;
                        flex-direction:column;
                        justify-content:center;
                    }
                }

@media (min-width:768px) {
                    #services .container-custom>div>div>div:first-child>div:last-child {
                        grid-template-columns:1fr 1fr;
                    }
                    #services .container-custom>div>div:last-child {
                        grid-template-columns:1fr 1fr 1fr;
                    }
                }
                @media (min-width:1024px) {
                    #services .container-custom>div>div:first-child {
                        grid-template-columns:2fr 1fr;
                    }
                    #services .container-custom>div>div:first-child>div:last-child {
                        grid-template-columns:1fr;
                    }
                    #services .container-custom>div>div:last-child {
                        grid-template-columns:1fr 1fr 1fr;
                    }
                }
                @media (min-width:1024px) {
                    #services .container-custom>div>div:first-child {
                        grid-template-columns:1.8fr 1fr;
                        gap: 24px;
                    }
                    #services .container-custom>div>div:first-child>div:last-child {
                        grid-template-columns:1fr;
                        gap: 20px;
                    }
                }

@media (min-width:768px) {
                        #comparison .container-custom>div {
                            grid-template-columns:1fr 1fr;
                        }
                    }

@media (min-width:768px) {
                        #contact .container-custom>div {
                            grid-template-columns:1fr 1fr;
                            gap: 48px;
                        }
                    }

@media (min-width:640px) {
                    footer .container-custom>div {
                        grid-template-columns:1fr 1fr;
                    }
                }
                @media (min-width:1024px) {
                    footer .container-custom>div {
                        grid-template-columns:1.5fr 1fr 1fr 1fr;
                    }
                }