/* ---------- Hero ---------- */
        .hero-section {
            padding: 72px 0 60px;
            background: linear-gradient(135deg, var(--bg-light) 0%, #FFFFFF 100%);
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .hero-title {
            font-family: var(--font-heading);
            font-size: 2.4rem;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 20px;
        }
        .hero-title .highlight {
            color: var(--accent);
        }
        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .hero-image {
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            background: #fff;
            padding: 12px;
        }
        .hero-image img {
            width: 100%;
            border-radius: var(--radius-sm);
        }

        @media (max-width: 992px) {
            .hero-grid {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 32px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-image {
                max-width: 480px;
                margin: 0 auto;
            }
        }
        @media (max-width: 576px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-section {
                padding: 48px 0 40px;
            }
        }

        /* ---------- Features ---------- */
        .feature-section {
            padding: 64px 0;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            padding: 28px 24px 24px;
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .feature-header {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 18px;
        }
        .feature-icon {
            flex: 0 0 48px;
            width: 48px;
            height: 48px;
            padding: 10px;
            background: #F0F6FF;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .feature-icon svg {
            width: 100%;
            height: 100%;
            stroke: var(--primary);
            stroke-width: 1.8;
            fill: none;
        }
        .feature-title {
            font-family: var(--font-heading);
            font-size: 1.1rem;
            color: var(--primary);
            margin: 0;
            line-height: 1.3;
        }
        .feature-content {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        @media (max-width: 576px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ---------- Specifications ---------- */
        .specs-section {
            padding: 64px 0;
            background: var(--bg-light);
        }
        .specs-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4px 40px;
            background: var(--bg-card);
            padding: 28px 36px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .spec-item {
            display: flex;
            justify-content: space-between;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .spec-item:last-child,
        .spec-item:nth-last-child(2) {
            border-bottom: none;
        }
        .spec-label {
            font-weight: 500;
            color: var(--primary);
        }
        .spec-value {
            color: var(--text);
            font-weight: 400;
            text-align: right;
        }

        @media (max-width: 768px) {
            .specs-grid {
                grid-template-columns: 1fr;
                padding: 20px 18px;
            }
            .spec-item {
                padding: 12px 0;
            }
            .spec-item:last-child {
                border-bottom: none;
            }
            .spec-item:nth-last-child(2) {
                border-bottom: 1px solid var(--border-light);
            }
        }

        /* ---------- How To Use (App Steps) ---------- */
        .howto-section {
            padding: 72px 0;
            background: linear-gradient(135deg, #F8FCFF 0%, #F0F6FF 100%);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            padding: 32px 28px 28px;
            border: 1px solid rgba(42, 92, 170, 0.08);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .step-number {
            position: absolute;
            top: 18px;
            right: 20px;
            width: 46px;
            height: 46px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 700;
            box-shadow: 0 4px 12px rgba(42, 92, 170, 0.3);
        }
        .step-title {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            color: var(--primary);
            margin: 0 0 20px 0;
            padding-right: 56px;
        }
        .step-body {
            display: flex;
            gap: 24px;
            align-items: stretch;
        }
        .step-guide {
            flex: 0 0 38%;
            background: #F8FAFF;
            border-radius: var(--radius-sm);
            padding: 20px 16px;
            text-align: center;
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 180px;
        }
        .step-guide .guide-text {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .step-guide .qr-image {
            width: 120px;
            height: 120px;
            object-fit: contain;
            border-radius: 6px;
            background: #fff;
            padding: 4px;
            box-shadow: var(--shadow-sm);
        }
        .step-guide .qr-caption {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 6px;
            word-break: break-all;
        }
        .step-guide .appstore-image {
            width: 130px;
            height: auto;
            border-radius: 10px;
            box-shadow: var(--shadow-sm);
            background: #fff;
            padding: 4px;
        }
        .step-guide .appstore-hint {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 8px;
        }
        .step-guide .appstore-hint strong {
            color: var(--primary);
        }
        .step-guide .download-link {
            display: inline-block;
            margin-top: 10px;
            padding: 10px 24px;
            background: var(--primary);
            color: #fff;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(42, 92, 170, 0.2);
            text-decoration: none;
        }
        .step-guide .download-link:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        .step-video {
            flex: 1;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }
        .video-player {
            position: relative;
            width: 100%;
            padding-bottom: 56.25%;
            background: #111;
            border-radius: var(--radius-sm);
            overflow: hidden;
            cursor: pointer;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .video-player:hover {
            box-shadow: var(--shadow-md);
        }
        .video-player .video-thumb {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .video-player:hover .video-thumb {
            transform: scale(1.02);
        }
        .video-player .play-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 0, 0, 0.25);
            transition: background 0.3s ease;
        }
        .video-player:hover .play-overlay {
            background: rgba(0, 0, 0, 0.15);
        }
        .video-player .play-btn {
            width: 68px;
            height: 68px;
            background: rgba(255, 255, 255, 0.92);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease, background 0.3s ease;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
            backdrop-filter: blur(2px);
        }
        .video-player:hover .play-btn {
            transform: scale(1.06);
            background: #fff;
        }
        .video-player .play-btn svg {
            margin-left: 4px;
            width: 36px;
            height: 36px;
            filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.15));
        }
        .video-player iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: none;
        }
        .video-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            text-align: center;
            margin: 10px 0 0;
            transition: color 0.3s ease;
        }
        .step-video:hover .video-label {
            color: var(--primary);
        }

        @media (max-width: 1024px) {
            .step-body {
                flex-direction: column;
            }
            .step-guide {
                flex: 1 1 auto;
                min-height: auto;
                padding: 18px 14px;
            }
            .step-guide .qr-image {
                width: 100px;
                height: 100px;
            }
            .step-guide .appstore-image {
                width: 110px;
            }
        }
        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .step-card {
                padding: 24px 18px 20px;
            }
            .step-number {
                width: 40px;
                height: 40px;
                font-size: 1.2rem;
                top: 14px;
                right: 14px;
            }
            .step-title {
                font-size: 1.15rem;
                padding-right: 48px;
            }
            .video-player .play-btn {
                width: 56px;
                height: 56px;
            }
            .video-player .play-btn svg {
                width: 30px;
                height: 30px;
            }
        }

        /* ---------- PC Reader Solution ---------- */
        .pc-reader-section {
            padding: 64px 0 48px;
            background: #FFFFFF;
        }
        .pc-reader-section .section-sub {
            text-align: center;
            max-width: 700px;
            margin: -1rem auto 2.8rem;
            color: var(--text-light);
            font-size: 1.05rem;
            line-height: 1.7;
        }
        .reader-main {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            padding: 36px 40px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .reader-main:hover {
            box-shadow: var(--shadow-lg);
        }
        .reader-left {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            background: #F8FAFF;
            border-radius: var(--radius-sm);
            padding: 28px 20px;
            border: 1px solid var(--border-light);
            text-align: center;
        }
        .reader-left .qr-image {
            width: 150px;
            height: 150px;
            object-fit: contain;
            border-radius: var(--radius-sm);
            background: #fff;
            padding: 6px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease;
        }
        .reader-left .qr-image:hover {
            transform: scale(1.02);
        }
        .reader-left .qr-label {
            font-size: 0.95rem;
            color: var(--text-light);
            margin: 14px 0 16px;
        }
        .reader-left .qr-label strong {
            color: var(--primary);
        }
        .reader-left .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(42, 92, 170, 0.2);
            text-decoration: none;
        }
        .reader-left .btn-download:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 28px rgba(42, 92, 170, 0.3);
            color: #fff;
        }
        .reader-left .btn-download svg {
            width: 20px;
            height: 20px;
            fill: currentColor;
        }

        .reader-right {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .reader-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px 24px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .reader-features li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.92rem;
            color: var(--text);
            line-height: 1.5;
            padding: 4px 0;
        }
        .reader-features li .feat-icon {
            flex: 0 0 22px;
            margin-top: 2px;
            color: var(--primary);
        }
        .reader-features li .feat-icon svg {
            width: 100%;
            height: auto;
            display: block;
        }
        .reader-features li strong {
            color: var(--primary);
            font-weight: 600;
        }

        .reader-video {
            margin-top: 2px;
        }
        .reader-video .video-player {
            border-radius: var(--radius-sm);
        }

        @media (max-width: 1024px) {
            .reader-main {
                grid-template-columns: 1fr 1fr;
                padding: 28px 24px;
                gap: 28px;
            }
            .reader-features {
                grid-template-columns: 1fr;
                gap: 6px;
            }
        }
        @media (max-width: 820px) {
            .reader-main {
                grid-template-columns: 1fr;
                padding: 24px 18px;
                gap: 24px;
            }
            .reader-left {
                padding: 20px 16px;
            }
            .reader-left .qr-image {
                width: 120px;
                height: 120px;
            }
        }
        @media (max-width: 576px) {
            .reader-main {
                padding: 16px 12px;
                gap: 20px;
            }
            .reader-left .qr-image {
                width: 100px;
                height: 100px;
            }
            .reader-left .btn-download {
                padding: 10px 22px;
                font-size: 0.85rem;
            }
            .reader-features li {
                font-size: 0.85rem;
            }
            .pc-reader-section .section-sub {
                font-size: 0.95rem;
            }
        }

        /* ---------- Driver Solutions ---------- */
        .driver-section {
            padding: 40px 0 60px;
            background: var(--bg-light);
        }
        .driver-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            max-width: 1000px;
            margin: 0 auto;
        }
        .driver-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            text-align: center;
        }
        .driver-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .driver-card .driver-visual {
            padding: 20px;
            background: #F8FAFF;
            height: 200px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background 0.3s ease;
        }
        .driver-card:hover .driver-visual {
            background: #F0F6FF;
        }
        .driver-card .driver-visual img {
            max-height: 160px;
            width: auto;
            object-fit: contain;
            transition: transform 0.4s ease;
        }
        .driver-card:hover .driver-visual img {
            transform: scale(1.04);
        }
        .driver-card .driver-info {
            padding: 18px 16px 22px;
            border-top: 1px solid var(--border-light);
            background: #fff;
        }
        .driver-card .driver-name {
            font-family: var(--font-heading);
            font-size: 1.05rem;
            color: var(--primary);
            margin: 0 0 6px;
        }
        .driver-card .driver-name a {
            color: inherit;
            text-decoration: none;
        }
        .driver-card .driver-name a:hover {
            color: var(--primary-light);
            text-decoration: underline;
        }
        .driver-card .driver-desc {
            color: var(--text-light);
            font-size: 0.88rem;
            line-height: 1.5;
            margin: 0;
        }

        @media (max-width: 820px) {
            .driver-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 576px) {
            .driver-grid {
                grid-template-columns: 1fr;
                max-width: 380px;
            }
            .driver-card .driver-visual {
                height: 160px;
            }
            .driver-card .driver-visual img {
                max-height: 120px;
            }
        }

        /* ---------- Downloads ---------- */
        .downloads-section {
            padding: 60px 0;
            background: #FFFFFF;
        }
        .download-list {
            list-style: none;
            max-width: 760px;
            margin: 0 auto;
            padding: 0;
        }
        .download-item {
            margin-bottom: 12px;
        }
        .download-item .download-link {
            display: flex;
            align-items: center;
            padding: 14px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            color: var(--primary);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            text-decoration: none;
            font-weight: 500;
            box-shadow: var(--shadow-sm);
        }
        .download-item .download-link:hover {
            background: var(--primary);
            color: #fff;
            transform: translateX(8px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        /* ---------- Recommended Products ---------- */
        .recommended-section {
            padding: 60px 0;
            background: var(--bg-light);
        }
        .recommended-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .product-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .product-card .product-image {
            position: relative;
            padding-top: 100%;
            background: #F8FAFF;
        }
        .product-card .product-image img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: contain;
            padding: 20px;
            transition: transform 0.4s ease;
        }
        .product-card:hover .product-image img {
            transform: scale(1.04);
        }
        .product-card .product-info {
            padding: 18px 16px 22px;
            text-align: center;
            border-top: 1px solid var(--border-light);
            background: #fff;
        }
        .product-card .product-name {
            font-family: var(--font-heading);
            font-size: 1rem;
            color: var(--primary);
            margin: 0 0 8px;
        }
        .product-card .product-desc {
            color: var(--text-light);
            font-size: 0.88rem;
            line-height: 1.5;
            margin: 0 0 14px;
        }
        .product-card .product-link {
            display: inline-block;
            padding: 8px 22px;
            background: var(--primary);
            color: #fff;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
            text-decoration: none;
        }
        .product-card .product-link:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            color: #fff;
        }

        @media (max-width: 1024px) {
            .recommended-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }
        @media (max-width: 576px) {
            .recommended-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
            }
        }

        /* ---------- Sustainable Technology ---------- */
        .eco-section {
            padding: 64px 0;
            background: linear-gradient(135deg, #F8FFF9 0%, #F5FCFF 100%);
            position: relative;
            overflow: hidden;
        }
        .eco-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(42, 92, 170, 0.04) 0%, transparent 70%);
            border-radius: 50%;
        }
        .eco-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            max-width: 1000px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        .eco-card {
            background: rgba(255, 255, 255, 0.92);
            padding: 28px 24px 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(42, 92, 170, 0.06);
            backdrop-filter: blur(4px);
            transition: var(--transition);
            text-align: center;
        }
        .eco-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(42, 92, 170, 0.15);
        }
        .eco-card h3 {
            font-family: var(--font-heading);
            font-size: 1.15rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .eco-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            margin: 0;
        }

        @media (max-width: 820px) {
            .eco-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }
        @media (max-width: 576px) {
            .eco-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
            }
        }

        /* ---------- About ---------- */
        .about-section {
            padding: 64px 0 80px;
            background: #FFFFFF;
            text-align: center;
        }
        .about-content {
            max-width: 760px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .about-content p {
            color: var(--text-light);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .about-content a {
            color: var(--primary);
            font-weight: 500;
        }
        .about-content a:hover {
            color: var(--primary-light);
            text-decoration: underline;
        }

        /* ---------- 视频播放通用脚本（统一） ---------- */
        .video-player[role="button"] {
            cursor: pointer;
        }
        .video-player[role="button"]:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }