/* ============================================================ */
        /* 1. 品牌配色 */
        /* ============================================================ */
        :root {
            --color-primary: #4F46E5;
            --color-primary-light: #818CF8;
            --color-primary-dark: #3730A3;
            --color-primary-bg: #EEF2FF;
            --color-secondary: #10B981;
            --color-accent: #F59E0B;
            --color-dark: #1E293B;
            --color-dark-bg: #0F172A;
            --color-text: #1E293B;
            --color-text-secondary: #475569;
            --color-bg-light: #F8FAFC;
            --color-white: #FFFFFF;
            --border-color: #E2E8F0;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
        }

        /* ============================================================ */
        /* 2. 基础重置 */
        /* ============================================================ */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background: var(--color-bg-light);
            color: var(--color-text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-label {
            font-size: 13px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--color-primary);
            margin-bottom: 6px;
        }
        .section-title {
            font-size: 38px;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            color: var(--color-dark);
        }
        .section-desc {
            font-size: 17px;
            color: var(--color-text-secondary);
            max-width: 560px;
        }

        .btn-ghost {
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 500;
            background: transparent;
            border: 1px solid var(--border-color);
            transition: all 0.2s;
            cursor: pointer;
            color: var(--color-text-secondary);
        }
        .btn-ghost:hover {
            background: var(--color-primary-bg);
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        /* ============================================================ */
        /* 3. 导航 */
        /* ============================================================ */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.78);
            -webkit-backdrop-filter: saturate(180%) blur(16px);
            backdrop-filter: saturate(180%) blur(16px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
        }
        .navbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 60px;
        }
        .logo {
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--color-dark);
        }
        .logo i {
            color: var(--color-primary);
            font-size: 22px;
        }
        .logo span {
            color: var(--color-dark);
        }
        .nav-links {
            display: flex;
            gap: 24px;
            list-style: none;
            font-size: 14px;
            font-weight: 500;
            flex-wrap: wrap;
        }
        .nav-links a {
            transition: color 0.2s;
            white-space: nowrap;
            color: var(--color-text-secondary);
            position: relative;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-primary);
            transition: width 0.3s ease;
        }
        .nav-links a:hover {
            color: var(--color-primary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            cursor: pointer;
            color: var(--color-text);
        }

        /* ============================================================ */
        /* 4. Hero */
        /* ============================================================ */
        .hero {
            padding: 140px 0 100px;
            background: var(--color-bg-light);
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }
        .hero .glow-1 {
            position: absolute;
            top: -15%;
            right: -8%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(79, 70, 229, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            animation: floatGlow 12s ease-in-out infinite alternate;
            z-index: 0;
        }
        .hero .glow-2 {
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            animation: floatGlow2 16s ease-in-out infinite alternate;
            z-index: 0;
        }
        @keyframes floatGlow {
            0% {
                transform: translate(0, 0) scale(1);
                opacity: 0.6;
            }
            100% {
                transform: translate(-40px, 30px) scale(1.15);
                opacity: 1;
            }
        }
        @keyframes floatGlow2 {
            0% {
                transform: translate(0, 0) scale(1);
                opacity: 0.4;
            }
            100% {
                transform: translate(50px, -30px) scale(1.2);
                opacity: 0.8;
            }
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 0.9fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-text h1 {
            font-size: 52px;
            font-weight: 700;
            letter-spacing: -0.03em;
            line-height: 1.05;
            margin-bottom: 18px;
            color: var(--color-dark);
        }
        .hero-text h1 .highlight {
            color: var(--color-primary);
            position: relative;
            display: inline-block;
        }
        .hero-text h1 .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            width: 100%;
            height: 6px;
            background: rgba(79, 70, 229, 0.15);
            border-radius: 4px;
            pointer-events: none;
        }
        .hero-text p {
            font-size: 19px;
            color: var(--color-text-secondary);
            max-width: 440px;
            margin-bottom: 28px;
        }
        .hero-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-buttons .btn-ghost {
            padding: 13px 28px;
            font-size: 16px;
        }

        .hero-visual {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            background: var(--color-white);
            border-radius: 32px;
            padding: 44px 30px;
            min-height: 280px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }
        .hero-visual::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(135deg,
                    transparent 30%,
                    rgba(255, 255, 255, 0.4) 50%,
                    transparent 70%);
            transform: rotate(25deg) translateX(-100%);
            animation: shimmer 6s ease-in-out infinite;
            pointer-events: none;
            z-index: 1;
        }
        @keyframes shimmer {
            0% {
                transform: rotate(25deg) translateX(-100%);
            }
            60% {
                transform: rotate(25deg) translateX(100%);
            }
            100% {
                transform: rotate(25deg) translateX(100%);
            }
        }

        .hero-visual .visual-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 12px;
            width: 100%;
            max-width: 300px;
            position: relative;
            z-index: 2;
        }
        .hero-visual .visual-grid span {
            background: var(--color-primary-bg);
            border-radius: 12px;
            padding: 16px 8px;
            text-align: center;
            font-size: 13px;
            color: var(--color-text);
            font-weight: 500;
            border: 1px solid rgba(79, 70, 229, 0.06);
            transition: background 0.2s;
        }
        .hero-visual .visual-grid span:hover {
            background: rgba(79, 70, 229, 0.1);
        }
        .hero-visual .visual-grid span i {
            display: block;
            font-size: 22px;
            color: var(--color-primary);
            margin-bottom: 4px;
        }
        .hero-visual .badge {
            position: absolute;
            bottom: 16px;
            left: 24px;
            background: rgba(255, 255, 255, 0.92);
            -webkit-backdrop-filter: blur(8px);
            backdrop-filter: blur(8px);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: var(--shadow-sm);
            color: var(--color-text);
            z-index: 2;
        }
        .hero-visual .badge i {
            color: var(--color-secondary);
            margin-right: 6px;
        }
        .hero-visual .big-icon {
            font-size: 80px;
            color: var(--color-primary);
            opacity: 0.04;
            position: absolute;
            bottom: 10px;
            right: 20px;
            pointer-events: none;
            z-index: 0;
        }

        /* ============================================================ */
        /* 5. 公司简介 */
        /* ============================================================ */
        .intro {
            padding: 70px 0 80px;
            background: var(--color-white);
            border-top: 1px solid var(--border-color);
        }
        .intro .container {
            max-width: 900px;
            position: relative;
        }
        .intro .intro-wrap {
            display: flex;
            gap: 40px;
            align-items: flex-start;
            padding-left: 20px;
        }
        .intro .intro-line {
            width: 4px;
            min-height: 120px;
            background: var(--color-primary);
            border-radius: 4px;
            flex-shrink: 0;
            margin-top: 8px;
            position: relative;
            overflow: hidden;
        }
        .intro .intro-line::after {
            content: '';
            position: absolute;
            top: -100%;
            left: 0;
            width: 100%;
            height: 60%;
            background: rgba(255, 255, 255, 0.6);
            animation: lightFlow 4s ease-in-out infinite;
        }
        @keyframes lightFlow {
            0% {
                top: -100%;
            }
            100% {
                top: 150%;
            }
        }

        .intro .intro-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 16px;
            font-size: 14px;
            color: var(--color-primary);
            font-weight: 500;
            background: var(--color-primary-bg);
            padding: 4px 18px 4px 14px;
            border-radius: 40px;
        }
        .intro .intro-tag svg {
            width: 14px;
            height: 14px;
            flex-shrink: 0;
        }

        .intro .intro-content h2 {
            font-size: 34px;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
            color: var(--color-dark);
        }
        .intro .intro-content p {
            font-size: 17px;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        /* ============================================================ */
        /* 6. 核心业务 */
        /* ============================================================ */
        .business {
            padding: 80px 0;
            background: var(--color-bg-light);
        }
        .business .section-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 40px;
        }
        .business .section-header .section-desc {
            margin-bottom: 0;
            text-align: right;
        }
        .business-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .business-grid .business-card {
            background: var(--color-white);
            border-radius: 20px;
            padding: 30px 26px 26px;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }
        .business-grid .business-card::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle, rgba(79, 70, 229, 0.04) 0%, transparent 70%);
            pointer-events: none;
            opacity: 0;
            transition: opacity 0.4s ease;
            z-index: 0;
        }
        .business-grid .business-card:hover::before {
            opacity: 1;
        }
        .business-grid .business-card:hover {
            transform: translateY(-4px);
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-lg);
        }
        .business-card .icon-wrap {
            width: 44px;
            height: 44px;
            background: var(--color-primary-bg);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-primary);
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .business-card h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--color-dark);
            position: relative;
            z-index: 1;
        }
        .business-card p {
            color: var(--color-text-secondary);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .business-card .tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 500;
            background: var(--color-primary-bg);
            padding: 2px 14px;
            border-radius: 20px;
            color: var(--color-primary);
            position: relative;
            z-index: 1;
        }

        .business-card.featured {
            grid-column: 1 / -1;
            background: var(--color-dark-bg);
            color: #fff;
            border-color: #334155;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            align-items: center;
            padding: 34px 36px;
        }
        .business-card.featured::before {
            background: radial-gradient(circle, rgba(129, 140, 248, 0.08) 0%, transparent 70%);
        }
        .business-card.featured .icon-wrap {
            background: rgba(255, 255, 255, 0.08);
            color: var(--color-secondary);
        }
        .business-card.featured h3 {
            color: #fff;
        }
        .business-card.featured p {
            color: #94A3B8;
            margin-bottom: 0;
        }
        .business-card.featured .tag {
            background: rgba(255, 255, 255, 0.08);
            color: #CBD5E1;
        }
        .business-card.featured .featured-right {
            text-align: right;
        }
        .business-card.featured .featured-right .tag {
            margin-top: 8px;
        }

        /* ============================================================ */
        /* 7. 服务流程 */
        /* ============================================================ */
        .process {
            padding: 80px 0;
            background: var(--color-white);
            border-top: 1px solid var(--border-color);
        }
        .process .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .process .section-header .section-desc {
            margin: 0 auto;
        }

        .process-timeline {
            display: flex;
            justify-content: space-between;
            position: relative;
            padding: 0 10px;
        }
        .process-timeline::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 40px;
            right: 40px;
            height: 2px;
            background: var(--border-color);
            z-index: 0;
        }
        .process-timeline::after {
            content: '';
            position: absolute;
            top: 36px;
            left: 40px;
            width: 12px;
            height: 12px;
            background: var(--color-primary);
            border-radius: 50%;
            box-shadow: 0 0 20px rgba(79, 70, 229, 0.3);
            animation: dotMove 6s ease-in-out infinite;
            z-index: 1;
        }
        @keyframes dotMove {
            0% {
                left: 40px;
                opacity: 1;
            }
            25% {
                left: calc(25% - 6px);
                opacity: 1;
            }
            50% {
                left: calc(50% - 6px);
                opacity: 1;
            }
            75% {
                left: calc(75% - 6px);
                opacity: 1;
            }
            100% {
                left: calc(100% - 40px - 12px);
                opacity: 0;
            }
        }

        .process-step {
            flex: 1;
            text-align: center;
            position: relative;
            z-index: 2;
            padding: 0 8px;
        }
        .process-step .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-white);
            border: 2.5px solid var(--color-primary);
            color: var(--color-primary);
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            transition: all 0.3s;
            position: relative;
        }
        .process-step:hover .step-number {
            background: var(--color-primary);
            color: #fff;
            transform: scale(1.05);
            box-shadow: 0 0 30px rgba(79, 70, 229, 0.2);
        }
        .process-step h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--color-dark);
        }
        .process-step p {
            font-size: 14px;
            color: var(--color-text-secondary);
            max-width: 160px;
            margin: 0 auto;
        }

        /* ============================================================ */
        /* 8. 技术栈 */
        /* ============================================================ */
        .tech-stack {
            padding: 80px 0;
            background: var(--color-bg-light);
            border-top: 1px solid var(--border-color);
        }
        .tech-stack .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .tech-stack .section-header .section-desc {
            margin: 0 auto;
        }

        .tech-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px 16px;
            max-width: 820px;
            margin: 0 auto;
        }
        .tech-cloud .tech-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 60px;
            background: var(--color-white);
            border: 1px solid var(--border-color);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            transition: all 0.25s ease;
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }
        .tech-cloud .tech-tag::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 30%, rgba(79, 70, 229, 0.06) 0%, transparent 80%);
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: 0;
        }
        .tech-cloud .tech-tag:hover::before {
            opacity: 1;
        }
        .tech-cloud .tech-tag:hover {
            border-color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .tech-cloud .tech-tag i {
            color: var(--color-primary);
            font-size: 18px;
            position: relative;
            z-index: 1;
        }
        .tech-cloud .tech-tag span {
            position: relative;
            z-index: 1;
        }
        .tech-cloud .tech-tag:nth-child(1) {
            font-size: 16px;
            padding: 12px 30px;
        }
        .tech-cloud .tech-tag:nth-child(3) {
            font-size: 13px;
            padding: 8px 20px;
        }
        .tech-cloud .tech-tag:nth-child(5) {
            font-size: 18px;
            padding: 14px 34px;
        }
        .tech-cloud .tech-tag:nth-child(7) {
            font-size: 13px;
            padding: 8px 18px;
        }
        .tech-cloud .tech-tag:nth-child(8) {
            font-size: 15px;
            padding: 10px 26px;
        }

        /* ============================================================ */
        /* 9. 价值观 */
        /* ============================================================ */
        .values-section {
            padding: 80px 0;
            background: var(--color-white);
            border-top: 1px solid var(--border-color);
        }
        .values-section .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .values-section .section-header .section-desc {
            margin: 0 auto;
        }

        .values-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            max-width: 860px;
            margin: 0 auto;
        }
        .values-list .value-item {
            display: grid;
            grid-template-columns: 48px 1fr auto;
            gap: 18px;
            align-items: center;
            padding: 18px 24px;
            background: var(--color-bg-light);
            border-radius: 16px;
            border: 1px solid var(--border-color);
            transition: all 0.25s ease;
            position: relative;
            overflow: hidden;
        }
        .values-list .value-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--color-primary);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .values-list .value-item:hover::before {
            opacity: 1;
        }
        .values-list .value-item:hover {
            background: var(--color-white);
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .values-list .value-item .vi {
            font-size: 24px;
            color: var(--color-primary);
            text-align: center;
        }
        .values-list .value-item .vi-content h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-dark);
        }
        .values-list .value-item .vi-content p {
            font-size: 15px;
            color: var(--color-text-secondary);
        }
        .values-list .value-item .vi-num {
            font-size: 30px;
            font-weight: 700;
            color: rgba(79, 70, 229, 0.06);
            font-family: Georgia, serif;
        }

        /* ============================================================ */
        /* 10. 服务承诺 */
        /* ============================================================ */
        .promise-section {
            padding: 80px 0;
            background: var(--color-bg-light);
            border-top: 1px solid var(--border-color);
        }
        .promise-section .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .promise-section .section-header .section-desc {
            margin: 0 auto;
        }

        .promise-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .promise-item {
            background: var(--color-white);
            border-radius: 20px;
            padding: 32px 26px 28px;
            border: 1px solid var(--border-color);
            position: relative;
            transition: all 0.3s ease;
            text-align: center;
            overflow: hidden;
            isolation: isolate;
        }
        .promise-item::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 100%;
            background: radial-gradient(ellipse at 50% 0%, rgba(79, 70, 229, 0.04) 0%, transparent 70%);
            pointer-events: none;
            opacity: 0;
            transition: opacity 0.4s ease;
        }
        .promise-item:hover::before {
            opacity: 1;
        }
        .promise-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-primary-light);
        }

        .promise-item .promise-num {
            position: absolute;
            top: 8px;
            right: 16px;
            font-size: 44px;
            font-weight: 700;
            color: rgba(79, 70, 229, 0.04);
            font-family: Georgia, serif;
            line-height: 1;
            pointer-events: none;
            z-index: 0;
        }
        .promise-item i {
            font-size: 34px;
            margin-bottom: 12px;
            display: inline-block;
            position: relative;
            z-index: 1;
        }
        .promise-item:nth-child(1) i {
            color: var(--color-primary);
        }
        .promise-item:nth-child(2) i {
            color: var(--color-secondary);
        }
        .promise-item:nth-child(3) i {
            color: var(--color-accent);
        }
        .promise-item h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--color-dark);
            position: relative;
            z-index: 1;
        }
        .promise-item p {
            font-size: 15px;
            color: var(--color-text-secondary);
            position: relative;
            z-index: 1;
        }

        /* ============================================================ */
        /* 11. FAQ */
        /* ============================================================ */
        .faq-section {
            padding: 80px 0;
            background: var(--color-white);
            border-top: 1px solid var(--border-color);
        }
        .faq-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--color-bg-light);
            border-radius: 16px;
            padding: 0 24px;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
            overflow: hidden;
        }
        .faq-item:hover {
            border-color: var(--color-primary-light);
        }
        .faq-item.active {
            background: var(--color-white);
            border-color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 500;
            font-size: 16px;
            padding: 18px 0;
            gap: 16px;
            color: var(--color-dark);
            /* 由 div 改为 button：原生支持键盘聚焦与回车/空格触发 */
            background: transparent;
            border: 0;
            width: 100%;
            font-family: inherit;
            text-align: left;
            line-height: 1.4;
        }
        .faq-item .faq-question:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 8px;
        }
        .faq-item .faq-question .q-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .faq-item .faq-question .q-left .q-icon {
            color: var(--color-primary);
            font-size: 14px;
            width: 20px;
            text-align: center;
        }
        .faq-item .faq-question i.fa-chevron-down {
            transition: transform 0.3s;
            color: var(--color-primary);
            font-size: 14px;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i.fa-chevron-down {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
        }

        /* ============================================================ */
        /* 12. 品牌宣言区 */
        /* ============================================================ */
        .brand-bar {
            padding: 28px 0;
            background: var(--color-dark-bg);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
        }
        .brand-bar .brand-slogan {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: #E2E8F0;
            font-size: 16px;
            font-weight: 400;
            letter-spacing: 0.04em;
        }
        .brand-bar .brand-slogan svg {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            color: var(--color-primary-light);
        }
        .brand-bar .brand-slogan .sep {
            color: #334155;
            font-weight: 300;
        }
        .brand-bar .brand-slogan .highlight-text {
            color: var(--color-primary-light);
            font-weight: 500;
        }

        /* ============================================================ */
        /* 13. 页脚（已去除所有联系方式） */
        /* ============================================================ */
        .footer {
            background: var(--color-dark-bg);
            color: #94A3B8;
            padding: 40px 0 28px;
            font-size: 14px;
        }
        .footer .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 30px;
        }
        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col .brand {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 2px;
        }
        .footer-col a {
            color: #94A3B8;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-icp {
            margin-top: 4px;
            font-size: 13px;
            color: #64748B;
        }
        .footer-icp a {
            color: #64748B;
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .footer-icp a:hover {
            color: #fff;
        }
        .footer-bottom {
            width: 100%;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 18px;
            margin-top: 14px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
        }

        .legal-links {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 4px;
        }
        .legal-links a {
            color: var(--color-primary-light);
            font-size: 13px;
            cursor: pointer;
            transition: color 0.2s;
        }
        .legal-links a:hover {
            color: #fff;
        }
        .legal-links .sep {
            color: #334155;
        }

        /* ============================================================ */
        /* 14. 模态框 */
        /* ============================================================ */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 23, 42, 0.7);
            -webkit-backdrop-filter: blur(4px);
            backdrop-filter: blur(4px);
            z-index: 99999;
            justify-content: center;
            align-items: center;
            padding: 20px;
            overflow-y: auto;
        }
        .modal-overlay.active {
            display: flex;
        }
        .modal-box {
            background: #FFFFFF;
            border-radius: 24px;
            max-width: 720px;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            padding: 40px 44px;
            position: relative;
            box-shadow: 0 40px 80px rgba(0, 0, 0, 0.3);
            animation: modalFadeIn 0.3s ease;
        }
        @keyframes modalFadeIn {
            from {
                opacity: 0;
                transform: scale(0.96) translateY(16px);
            }
            to {
                opacity: 1;
                transform: scale(1) translateY(0);
            }
        }
        .modal-box .modal-close {
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 28px;
            background: none;
            border: none;
            cursor: pointer;
            color: #94A3B8;
            transition: color 0.2s;
            line-height: 1;
        }
        .modal-box .modal-close:hover {
            color: #1E293B;
        }
        .modal-box h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
            padding-right: 30px;
        }
        .modal-box .modal-sub {
            color: var(--color-text-secondary);
            font-size: 14px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 16px;
            margin-bottom: 24px;
        }
        .modal-box h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-dark);
            margin-top: 24px;
            margin-bottom: 8px;
        }
        .modal-box h3:first-of-type {
            margin-top: 0;
        }
        .modal-box p,
        .modal-box li {
            font-size: 15px;
            line-height: 1.8;
            color: var(--color-text-secondary);
        }
        .modal-box ul {
            padding-left: 20px;
            margin-bottom: 8px;
        }
        .modal-box li {
            margin-bottom: 4px;
        }

        /* ============================================================ */
        /* 15. Cookie 横幅（已增加“拒绝”选项） */
        /* ============================================================ */
        #cookieBanner {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--color-dark-bg);
            color: #E2E8F0;
            padding: 14px 24px;
            z-index: 9999;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            border-top: 2px solid var(--color-primary);
            font-size: 14px;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
        }
        #cookieBanner a {
            color: var(--color-primary-light);
            text-decoration: underline;
            text-underline-offset: 2px;
            cursor: pointer;
        }
        #cookieBanner .cookie-actions {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        #cookieBanner .btn-cookie {
            background: var(--color-primary);
            color: #fff;
            border: none;
            padding: 6px 24px;
            border-radius: 40px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 500;
            transition: background 0.2s;
            white-space: nowrap;
        }
        #cookieBanner .btn-cookie:hover {
            background: var(--color-primary-dark);
        }
        #cookieBanner .btn-cookie-outline {
            background: transparent;
            color: #94A3B8;
            border: 1px solid #475569;
            padding: 6px 24px;
            border-radius: 40px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 400;
            transition: all 0.2s;
            white-space: nowrap;
        }
        #cookieBanner .btn-cookie-outline:hover {
            border-color: #94A3B8;
            color: #fff;
        }

        /* ============================================================ */
        /* 16. 响应式 */
        /* ============================================================ */
        @media (max-width: 992px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-text h1 {
                font-size: 40px;
            }
            .business-grid {
                grid-template-columns: 1fr 1fr;
            }
            .business-card.featured {
                grid-template-columns: 1fr;
                gap: 16px;
                text-align: center;
            }
            .business-card.featured .featured-right {
                text-align: center;
            }
            .process-timeline {
                flex-wrap: wrap;
                gap: 30px;
                justify-content: center;
            }
            .process-timeline::before,
            .process-timeline::after {
                display: none;
            }
            .process-step {
                flex: 0 0 calc(50% - 16px);
                max-width: 200px;
            }
            .promise-grid {
                grid-template-columns: 1fr 1fr;
            }
            .intro .intro-wrap {
                flex-direction: column;
                padding-left: 0;
            }
            .intro .intro-line {
                min-height: 4px;
                width: 80px;
                margin-top: 0;
            }
            .modal-box {
                padding: 30px 24px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 60px;
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                -webkit-backdrop-filter: blur(16px);
                backdrop-filter: blur(16px);
                padding: 24px;
                gap: 16px;
                border-bottom: 1px solid var(--border-color);
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            .hero {
                padding: 100px 0 60px;
            }
            .hero-text h1 {
                font-size: 32px;
            }
            .hero-visual .visual-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-title {
                font-size: 30px;
            }
            .business-grid {
                grid-template-columns: 1fr;
            }
            .business-card.featured {
                grid-column: 1;
            }
            .process-step {
                flex: 0 0 100%;
                max-width: 100%;
            }
            .tech-cloud .tech-tag {
                font-size: 13px !important;
                padding: 8px 18px !important;
            }
            .values-list .value-item {
                grid-template-columns: 40px 1fr;
                gap: 12px;
                padding: 14px 18px;
            }
            .values-list .value-item .vi-num {
                display: none;
            }
            .promise-grid {
                grid-template-columns: 1fr;
            }
            .faq-item .faq-question {
                font-size: 15px;
            }
            .footer .container {
                flex-direction: column;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .modal-box {
                padding: 24px 16px;
            }
            .modal-box h2 {
                font-size: 22px;
            }
            .brand-bar .brand-slogan {
                font-size: 14px;
                flex-wrap: wrap;
                justify-content: center;
            }
            #cookieBanner {
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
            }
            #cookieBanner .cookie-actions {
                justify-content: flex-start;
            }
        }

        @media (max-width: 480px) {
            .hero-text h1 {
                font-size: 26px;
            }
            .hero-visual .visual-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .hero-visual .visual-grid span {
                padding: 12px 6px;
                font-size: 12px;
            }
            .section-title {
                font-size: 26px;
            }
            .business .section-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .business .section-header .section-desc {
                text-align: left;
            }
            #cookieBanner {
                font-size: 13px;
                padding: 14px 16px;
            }
            #cookieBanner .btn-cookie,
            #cookieBanner .btn-cookie-outline {
                width: 100%;
                text-align: center;
                padding: 8px;
            }
            #cookieBanner .cookie-actions {
                flex-direction: column;
                width: 100%;
            }
            .brand-bar .brand-slogan {
                font-size: 13px;
                gap: 8px;
            }
            .brand-bar .brand-slogan svg {
                width: 16px;
                height: 16px;
            }
        }
        /* ============================================================ */
        /* 页脚内联样式外置（D2） */
        /* ============================================================ */
        .footer .brand .fas { color: #818CF8; }
        .footer-copy { font-size: 13px; color: #64748B; }
        .footer-bottom span { font-size: 13px; }
        .footer-bottom .muted { color: #64748B; }

        /* ============================================================ */
        /* 跳转主内容（skip-link，参考 new-index.html） */
        /* ============================================================ */
        .skip-link {
            position: absolute;
            left: -9999px;
            top: 8px;
            z-index: 100;
            background: var(--color-primary);
            color: #fff;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
        }
        .skip-link:focus {
            left: 16px;
        }
        .skip-link:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 2px;
        }

        /* ============================================================ */
        /* 页脚备案号展示模块（合规列，参考 new-index.html） */
        /* ============================================================ */
        .footer-cols {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 30px;
            width: 100%;
            padding-bottom: 34px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-heading {
            font-size: 13px;
            color: #fff;
            font-weight: 600;
            margin: 0 0 14px;
        }
        .footer-col > a {
            display: block;
            color: #94A3B8;
            padding: 5px 0;
            transition: color 0.2s;
        }
        .footer-col > a:hover {
            color: var(--color-primary-light);
        }
        @media (max-width: 980px) {
            .footer-cols { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 620px) {
            .footer-cols { grid-template-columns: 1fr; }
        }

    

/* ============================================================ */
/* 无障碍：尊重系统"减少动态效果"偏好 (P1) */
/* ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}