/* roulang page: index */
:root {
            --color-primary: #FF5C2E;
            --color-primary-dark: #E82600;
            --color-primary-light: #FFF0EB;
            --color-dark: #0F1A1F;
            --color-gray: #5A6673;
            --color-gray-light: #8A96A3;
            --color-accent: #00C9A7;
            --color-accent-light: #E6FAF6;
            --color-bg: #FFFFFF;
            --color-bg-alt: #F5F7FA;
            --color-white: #FFFFFF;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --shadow-card: 0 8px 20px rgba(15, 26, 31, 0.06);
            --shadow-card-hover: 0 16px 36px rgba(15, 26, 31, 0.12);
            --shadow-nav: 0 2px 12px rgba(15, 26, 31, 0.08);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --section-padding: 80px;
            --section-padding-mobile: 48px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            font-weight: 400;
            color: var(--color-dark);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--color-white);
            transition: box-shadow var(--transition-smooth);
            height: 68px;
            display: flex;
            align-items: center;
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-nav);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--color-dark);
            letter-spacing: 0.02em;
            flex-shrink: 0;
            z-index: 1001;
        }

        .logo-link:hover {
            color: var(--color-primary);
        }

        .logo-svg {
            width: 34px;
            height: 34px;
            flex-shrink: 0;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-list a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-dark);
            border-radius: var(--radius-md);
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform var(--transition-smooth);
            transform-origin: center;
        }

        .nav-list a:hover,
        .nav-list a:focus-visible {
            color: var(--color-primary);
            background: var(--color-primary-light);
            outline: none;
        }

        .nav-list a:hover::after,
        .nav-list a:focus-visible::after {
            transform: scaleX(1);
        }

        .nav-cta-mobile {
            display: none;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            z-index: 1001;
            cursor: pointer;
            background: none;
            border: none;
            width: 40px;
            height: 32px;
            justify-content: center;
            align-items: center;
        }

        .menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--color-dark);
            border-radius: 2px;
            transition: var(--transition-smooth);
            transform-origin: center;
        }

        .menu-toggle.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }

        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .menu-toggle.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            width: 280px;
            height: 100vh;
            background: var(--color-dark);
            z-index: 999;
            padding: 90px 32px 40px;
            flex-direction: column;
            gap: 8px;
            transform: translateX(100%);
            transition: transform var(--transition-smooth);
            box-shadow: -4px 0 30px rgba(0, 0, 0, 0.3);
        }

        .mobile-nav-panel.active {
            transform: translateX(0);
        }

        .mobile-nav-panel a {
            display: block;
            color: var(--color-white);
            font-size: 17px;
            font-weight: 500;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            transition: background var(--transition-fast), color var(--transition-fast);
        }

        .mobile-nav-panel a:hover,
        .mobile-nav-panel a:focus-visible {
            background: rgba(255, 92, 46, 0.2);
            color: var(--color-primary);
            outline: none;
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 26, 31, 0.6);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition-smooth);
            pointer-events: none;
        }

        .mobile-overlay.active {
            opacity: 1;
            pointer-events: all;
        }

        @media (max-width: 1024px) {
            .nav-list {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .mobile-nav-panel {
                display: flex;
            }
            .mobile-overlay {
                display: block;
            }
            .nav-cta-mobile {
                display: block;
                margin-top: 16px;
            }
            .nav-cta-mobile .btn-primary {
                width: 100%;
                text-align: center;
                justify-content: center;
                display: inline-flex;
                align-items: center;
                gap: 8px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                padding: 0 16px;
            }
            .site-header {
                height: 60px;
            }
            .logo-link {
                font-size: 18px;
            }
            .logo-svg {
                width: 28px;
                height: 28px;
            }
            .mobile-nav-panel {
                width: 260px;
                padding: 75px 20px 30px;
            }
        }

        /* ===== Hero 首屏 ===== */
        .hero-section {
            min-height: 620px;
            display: flex;
            align-items: center;
            position: relative;
            background-image: linear-gradient(135deg, rgba(255, 92, 46, 0.92) 0%, rgba(232, 38, 0, 0.94) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            margin-top: 0;
            padding-top: 68px;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(/%23noise)' opacity='0.18'/%3E%3C/svg%3E");
            background-size: 180px 180px;
            pointer-events: none;
            z-index: 0;
        }

        .hero-speed-lines {
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 1;
            opacity: 0.35;
        }

        .hero-speed-line {
            position: absolute;
            height: 2px;
            background: var(--color-white);
            border-radius: 1px;
            animation: speedLine linear infinite;
        }

        .hero-speed-line:nth-child(1) {
            top: 20%;
            left: -10%;
            width: 180px;
            animation-duration: 3.2s;
            animation-delay: 0s;
        }
        .hero-speed-line:nth-child(2) {
            top: 38%;
            left: -8%;
            width: 240px;
            animation-duration: 4.5s;
            animation-delay: 0.8s;
        }
        .hero-speed-line:nth-child(3) {
            top: 55%;
            left: -12%;
            width: 160px;
            animation-duration: 3.8s;
            animation-delay: 1.6s;
        }
        .hero-speed-line:nth-child(4) {
            top: 70%;
            left: -6%;
            width: 200px;
            animation-duration: 5s;
            animation-delay: 0.3s;
        }
        .hero-speed-line:nth-child(5) {
            top: 25%;
            left: -15%;
            width: 120px;
            animation-duration: 3s;
            animation-delay: 2s;
        }
        .hero-speed-line:nth-child(6) {
            top: 60%;
            left: -9%;
            width: 260px;
            animation-duration: 4.2s;
            animation-delay: 1.1s;
        }

        @keyframes speedLine {
            0% {
                transform: translateX(0);
                opacity: 0;
            }
            15% {
                opacity: 1;
            }
            85% {
                opacity: 1;
            }
            100% {
                transform: translateX(130vw);
                opacity: 0;
            }
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 48px;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 60px 24px;
        }

        .hero-text {
            flex: 1;
            max-width: 600px;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.2);
            color: var(--color-white);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.25);
        }

        .hero-title {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--color-white);
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .hero-subtitle {
            font-size: 18px;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 32px;
            max-width: 480px;
        }

        .hero-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .hero-visual {
            flex: 1;
            max-width: 440px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .hero-visual-inner {
            width: 100%;
            aspect-ratio: 4/3;
            border-radius: var(--radius-xl);
            overflow: hidden;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .hero-visual-inner img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.85;
        }

        .hero-visual-glow {
            position: absolute;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.25) 0%, transparent 70%);
            pointer-events: none;
            animation: glowPulse 4s ease-in-out infinite;
        }

        @keyframes glowPulse {
            0%,
            100% {
                transform: scale(1);
                opacity: 0.6;
            }
            50% {
                transform: scale(1.25);
                opacity: 0.9;
            }
        }

        @media (max-width: 1024px) {
            .hero-content {
                flex-direction: column;
                text-align: center;
                padding: 40px 24px 50px;
                gap: 32px;
            }
            .hero-text {
                max-width: 100%;
            }
            .hero-subtitle {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-visual {
                max-width: 360px;
            }
            .hero-title {
                font-size: 36px;
            }
            .hero-section {
                min-height: auto;
                padding-top: 60px;
            }
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: auto;
                padding-top: 60px;
            }
            .hero-content {
                padding: 28px 16px 40px;
                gap: 24px;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-badge {
                font-size: 12px;
                padding: 5px 12px;
            }
            .hero-visual {
                max-width: 280px;
            }
            .hero-buttons {
                flex-direction: column;
                width: 100%;
            }
            .hero-buttons .btn-primary,
            .hero-buttons .btn-outline-white {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 按钮系统 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-primary);
            color: var(--color-white);
            font-weight: 600;
            font-size: 15px;
            padding: 13px 28px;
            border-radius: var(--radius-md);
            min-width: 160px;
            justify-content: center;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            letter-spacing: 0.02em;
            white-space: nowrap;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(255, 92, 46, 0.3);
        }

        .btn-primary:hover,
        .btn-primary:focus-visible {
            background: var(--color-primary-dark);
            transform: scale(1.03);
            box-shadow: 0 8px 24px rgba(255, 92, 46, 0.4);
            outline: none;
        }

        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--color-white);
            font-weight: 600;
            font-size: 15px;
            padding: 13px 28px;
            border-radius: var(--radius-md);
            min-width: 160px;
            justify-content: center;
            transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
            letter-spacing: 0.02em;
            white-space: nowrap;
            border: 1.5px solid rgba(255, 255, 255, 0.7);
            cursor: pointer;
        }

        .btn-outline-white:hover,
        .btn-outline-white:focus-visible {
            background: rgba(255, 255, 255, 0.15);
            border-color: var(--color-white);
            transform: scale(1.03);
            outline: none;
        }

        .btn-outline-orange {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 26px;
            border-radius: var(--radius-md);
            border: 1.5px solid var(--color-primary);
            transition: background var(--transition-fast), transform var(--transition-fast);
            letter-spacing: 0.02em;
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-outline-orange:hover,
        .btn-outline-orange:focus-visible {
            background: var(--color-primary-light);
            transform: scale(1.03);
            outline: none;
        }

        .btn-sm {
            font-size: 14px;
            padding: 9px 18px;
            min-width: auto;
            border-radius: var(--radius-sm);
        }

        @media (max-width: 768px) {
            .btn-primary,
            .btn-outline-white,
            .btn-outline-orange {
                font-size: 14px;
                padding: 12px 22px;
                min-width: auto;
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--section-padding) 0;
        }

        .section-alt {
            background: var(--color-bg-alt);
        }

        .section-dark {
            background: var(--color-dark);
            color: var(--color-white);
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-dark);
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }

        .section-dark .section-header h2 {
            color: var(--color-white);
        }

        .section-header .section-subtitle {
            font-size: 16px;
            color: var(--color-gray);
            max-width: 540px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-dark .section-header .section-subtitle {
            color: var(--color-gray-light);
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--section-padding-mobile) 0;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header .section-subtitle {
                font-size: 15px;
            }
        }

        /* ===== 服务板块 2+1 非对称 ===== */
        .services-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            grid-template-rows: auto auto;
            gap: 24px;
            align-items: stretch;
        }

        .services-left {
            grid-column: 1;
            grid-row: 1 / 3;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .services-right {
            grid-column: 2;
            grid-row: 1 / 3;
        }

        .service-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 28px 28px 24px;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 12px;
            position: relative;
            overflow: hidden;
            cursor: default;
            height: 100%;
        }

        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .service-card-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--color-primary);
            flex-shrink: 0;
            transition: background var(--transition-fast), color var(--transition-fast);
        }

        .service-card:hover .service-card-icon {
            background: var(--color-primary);
            color: var(--color-white);
        }

        .service-card h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-dark);
        }

        .service-card p {
            font-size: 15px;
            color: var(--color-gray);
            line-height: 1.6;
            flex-grow: 1;
        }

        .service-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            transition: gap var(--transition-fast);
            align-self: flex-start;
        }

        .service-card-link:hover {
            gap: 10px;
        }

        .service-card-featured {
            background: var(--color-dark);
            color: var(--color-white);
            display: flex;
            flex-direction: column;
            gap: 16px;
            padding: 32px 28px;
        }

        .service-card-featured h3 {
            color: var(--color-white);
            font-size: 20px;
        }
        .service-card-featured p {
            color: rgba(255, 255, 255, 0.8);
        }
        .service-card-featured .service-card-icon {
            background: rgba(255, 255, 255, 0.15);
            color: var(--color-accent);
        }
        .service-card-featured:hover .service-card-icon {
            background: var(--color-accent);
            color: var(--color-dark);
        }
        .service-card-featured .service-card-link {
            color: var(--color-accent);
        }
        .service-card-featured .highlight-tag {
            display: inline-block;
            background: var(--color-accent);
            color: var(--color-dark);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 12px;
            letter-spacing: 0.04em;
            align-self: flex-start;
        }

        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: 1fr;
                grid-template-rows: auto;
            }
            .services-left {
                grid-column: 1;
                grid-row: auto;
            }
            .services-right {
                grid-column: 1;
                grid-row: auto;
            }
            .service-card-featured {
                min-height: auto;
            }
        }

        @media (max-width: 768px) {
            .service-card {
                padding: 22px 18px 20px;
            }
            .service-card h3 {
                font-size: 17px;
            }
            .service-card p {
                font-size: 14px;
            }
            .service-card-icon {
                width: 44px;
                height: 44px;
                font-size: 18px;
            }
            .service-card-featured {
                padding: 24px 18px;
            }
        }

        /* ===== 数据亮点 ===== */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }

        .data-item {
            padding: 24px 16px;
        }

        .data-number {
            font-size: 56px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.1;
            letter-spacing: -0.02em;
            margin-bottom: 8px;
            font-variant-numeric: tabular-nums;
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
        }

        .data-suffix {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-primary);
        }

        .data-label {
            font-size: 15px;
            color: var(--color-gray);
            font-weight: 500;
        }

        .section-dark .data-label {
            color: var(--color-gray-light);
        }

        @media (max-width: 1024px) {
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .data-number {
                font-size: 44px;
            }
            .data-suffix {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .data-item {
                padding: 16px 8px;
            }
            .data-number {
                font-size: 36px;
            }
            .data-suffix {
                font-size: 24px;
            }
            .data-label {
                font-size: 13px;
            }
        }

        /* ===== 案例卡片 ===== */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .case-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .case-card-image {
            width: 100%;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--color-bg-alt);
            position: relative;
        }

        .case-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .case-card:hover .case-card-image img {
            transform: scale(1.05);
        }

        .case-card-body {
            padding: 20px 22px 22px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .case-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-dark);
        }

        .case-card-body p {
            font-size: 14px;
            color: var(--color-gray);
            line-height: 1.6;
            flex-grow: 1;
        }

        .case-tag {
            display: inline-block;
            background: var(--color-accent-light);
            color: #007A60;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 12px;
            letter-spacing: 0.03em;
            align-self: flex-start;
            white-space: nowrap;
        }

        @media (max-width: 768px) {
            .cases-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .case-card-body {
                padding: 16px;
            }
            .case-card-body h3 {
                font-size: 16px;
            }
        }

        /* ===== 流程时间轴 ===== */
        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
            padding: 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--color-primary);
            transform: translateX(-50%);
            border-radius: 1px;
        }

        .timeline-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 40px;
            position: relative;
            gap: 24px;
        }

        .timeline-item:nth-child(odd) {
            flex-direction: row;
            padding-right: calc(50% + 40px);
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            flex-direction: row-reverse;
            padding-left: calc(50% + 40px);
            text-align: left;
        }

        .timeline-dot {
            position: absolute;
            left: 50%;
            top: 6px;
            transform: translateX(-50%);
            width: 16px;
            height: 16px;
            background: var(--color-primary);
            border-radius: 50%;
            z-index: 1;
            box-shadow: 0 0 0 6px rgba(255, 92, 46, 0.15);
            flex-shrink: 0;
        }

        .timeline-content {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 22px 24px;
            box-shadow: var(--shadow-card);
            flex: 1;
            max-width: 380px;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
        }

        .timeline-content:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }

        .timeline-step {
            font-size: 13px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.06em;
            margin-bottom: 6px;
            text-transform: uppercase;
        }

        .timeline-content h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-dark);
            margin-bottom: 6px;
        }

        .timeline-content p {
            font-size: 14px;
            color: var(--color-gray);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                flex-direction: row !important;
                padding-left: 52px !important;
                padding-right: 0 !important;
                text-align: left !important;
                margin-bottom: 28px;
            }
            .timeline-dot {
                left: 20px;
            }
            .timeline-content {
                max-width: 100%;
                padding: 16px 18px;
            }
            .timeline-content h3 {
                font-size: 16px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: 0 2px 8px rgba(15, 26, 31, 0.04);
            overflow: hidden;
            transition: box-shadow var(--transition-fast);
            border: 1px solid transparent;
        }

        .faq-item.open {
            box-shadow: var(--shadow-card);
            border-color: #f0f0f0;
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-dark);
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            transition: background var(--transition-fast);
            background: none;
            border: none;
            font-family: inherit;
            line-height: 1.5;
        }

        .faq-question:hover {
            background: var(--color-bg-alt);
        }

        .faq-q-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--color-primary);
            flex-shrink: 0;
            transition: transform var(--transition-fast), background var(--transition-fast);
        }

        .faq-item.open .faq-q-dot {
            transform: scale(1.5);
            background: var(--color-primary-dark);
        }

        .faq-arrow {
            margin-left: auto;
            font-size: 12px;
            color: var(--color-gray-light);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: var(--color-primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            padding: 0 20px 0 42px;
            font-size: 14px;
            color: var(--color-gray);
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px 42px;
        }

        @media (max-width: 768px) {
            .faq-question {
                font-size: 14px;
                padding: 15px 16px;
                gap: 10px;
            }
            .faq-answer {
                padding: 0 16px 0 36px;
                font-size: 13px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px 36px;
            }
        }

        /* ===== 联系 CTA ===== */
        .contact-section {
            background: var(--color-dark);
            color: var(--color-white);
            padding: var(--section-padding) 0;
            position: relative;
            overflow: hidden;
        }

        .contact-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 92, 46, 0.25) 0%, transparent 70%);
            pointer-events: none;
        }

        .contact-inner {
            display: flex;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .contact-info {
            flex: 1;
        }

        .contact-info h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--color-white);
        }

        .contact-info p {
            font-size: 16px;
            color: var(--color-gray-light);
            margin-bottom: 24px;
            line-height: 1.6;
        }

        .contact-detail {
            font-size: 14px;
            color: var(--color-gray-light);
            line-height: 1.8;
        }

        .contact-detail i {
            color: var(--color-primary);
            width: 20px;
            text-align: center;
            margin-right: 6px;
        }

        .contact-form-wrap {
            flex: 1;
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 13px 16px;
            border: 1.5px solid #e0e4e8;
            border-radius: var(--radius-md);
            font-size: 15px;
            color: var(--color-dark);
            background: var(--color-bg-alt);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            font-family: inherit;
            resize: vertical;
        }

        .contact-form input:focus,
        .contact-form textarea:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(255, 92, 46, 0.1);
            background: var(--color-white);
        }

        .contact-form textarea {
            min-height: 100px;
        }

        .contact-form .btn-primary {
            width: 100%;
            justify-content: center;
            font-size: 16px;
            padding: 14px;
        }

        @media (max-width: 1024px) {
            .contact-inner {
                flex-direction: column;
                gap: 32px;
            }
            .contact-info {
                text-align: center;
            }
        }

        @media (max-width: 768px) {
            .contact-info h2 {
                font-size: 24px;
            }
            .contact-form-wrap {
                padding: 22px 16px;
            }
            .contact-form input,
            .contact-form textarea {
                font-size: 14px;
                padding: 11px 14px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0A1217;
            color: var(--color-gray-light);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-gray-light);
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--color-gray-light);
            padding: 4px 0;
            transition: color var(--transition-fast);
            line-height: 1.8;
        }

        .footer-col a:hover {
            color: var(--color-primary);
        }

        .footer-logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 8px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            color: var(--color-gray-light);
            transition: background var(--transition-fast), color var(--transition-fast);
        }

        .footer-social a:hover {
            background: var(--color-primary);
            color: var(--color-white);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: var(--color-gray-light);
            letter-spacing: 0.02em;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-col:first-child {
                grid-column: 1 / -1;
            }
            .site-footer {
                padding: 36px 0 20px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== 辅助样式 ===== */
        .text-accent {
            color: var(--color-accent);
        }
        .text-primary {
            color: var(--color-primary);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .mb-sm {
            margin-bottom: 8px;
        }
        .mb-md {
            margin-bottom: 16px;
        }
        .mb-lg {
            margin-bottom: 24px;
        }

        /* 焦点可见样式 */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(255, 92, 46, 0.5);
            outline-offset: 2px;
        }