/* ============================================================
           RESET & VARIABLES (Apple-style) – 完全保留源码1样式
           ============================================================ */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #ffffff;
            color: #1d1d1f;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ============================================================
           TYPOGRAPHY
           ============================================================ */
        .section-label {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 1.2px;
            text-transform: uppercase;
            color: #86868b;
            margin-bottom: 10px;
            background: #f0f0f2;
            padding: 4px 18px;
            border-radius: 100px;
        }
        .section-title {
            font-size: 2.8rem;
            font-weight: 700;
            letter-spacing: -0.03em;
            line-height: 1.1;
            color: #1d1d1f;
        }
        .section-title .highlight {
            color: #0066cc;
            border-bottom: 4px solid #0066cc;
            padding-bottom: 2px;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: #86868b;
            max-width: 600px;
            margin-top: 12px;
            font-weight: 400;
            line-height: 1.7;
        }
        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }
        /* ============================================================
           BUTTONS
           ============================================================ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 40px;
            border-radius: 980px;
            font-weight: 500;
            font-size: 0.95rem;
            border: 1px solid transparent;
            transition: all 0.3s ease;
            cursor: pointer;
            background: transparent;
            color: #1d1d1f;
            text-decoration: none;
        }
        .btn-primary {
            background: #1d1d1f;
            color: #fff;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
        }
        .btn-primary:hover {
            background: #333;
            transform: scale(1.02);
            color: #fff;
        }
        .btn-outline {
            border-color: #d2d2d7;
            color: #1d1d1f;
        }
        .btn-outline:hover {
            background: #e8e8ed;
            border-color: #a1a1a6;
        }
        .btn-accent {
            background: #0066cc;
            color: #fff;
        }
        .btn-accent:hover {
            background: #0055b3;
            color: #fff;
        }
        .btn-sm {
            padding: 8px 24px;
            font-size: 0.8rem;
        }
        /* ============================================================
           COMPATIBILITY ALERT
           ============================================================ */
        .compat-alert {
            background: #fff8f8;
            padding: 14px 20px;
            border-left: 6px solid #e74c3c;
            border-radius: 10px;
            margin: 30px 0 20px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            box-shadow: 0 2px 12px rgba(231, 76, 60, 0.08);
        }
        .compat-alert .alert-icon {
            font-size: 1.8rem;
            flex-shrink: 0;
            line-height: 1.2;
        }
        .compat-alert .alert-body {
            flex: 1;
        }
        .compat-alert .alert-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #c0392b;
            margin: 0 0 4px;
        }
        .compat-alert .alert-body p {
            font-size: 0.95rem;
            color: #5a3d3d;
            margin: 0;
        }
        .compat-alert .alert-body strong {
            color: #e74c3c;
        }
        @media (max-width: 600px) {
            .compat-alert {
                flex-direction: column;
                align-items: center;
                text-align: center;
                padding: 16px;
            }
            .compat-alert .alert-icon {
                font-size: 2.2rem;
            }
        }
        /* ============================================================
           HERO
           ============================================================ */
        .hero {
            padding: 60px 0 50px;
            background: #ffffff;
            border-bottom: 1px solid #f0f0f2;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .hero-text h1 {
            font-size: 3.2rem;
            font-weight: 700;
            letter-spacing: -0.035em;
            line-height: 1.05;
            color: #1d1d1f;
            margin-bottom: 16px;
        }
        .hero-text h1 .highlight {
            color: #0066cc;
        }
        .hero-text p {
            font-size: 1.1rem;
            color: #86868b;
            max-width: 480px;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .hero-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 6px 24px;
            margin-bottom: 28px;
            list-style: none;
            padding: 0;
        }
        .hero-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.92rem;
            color: #424245;
        }
        .hero-features li .icon {
            color: #0066cc;
            font-weight: 600;
        }
        .hero-image {
            display: flex;
            justify-content: center;
            align-items: center;
            background: #f8f8fa;
            border-radius: 32px;
            padding: 24px;
        }
        .hero-image img {
            max-height: 400px;
            object-fit: contain;
            filter: drop-shadow(0 8px 30px rgba(0, 0, 0, 0.04));
        }
        @media (max-width: 1024px) {
            .hero-text h1 { font-size: 2.6rem; }
        }
        @media (max-width: 768px) {
            .hero-grid {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 40px;
            }
            .hero-text h1 { font-size: 2.2rem; }
            .hero-text p { margin-left: auto; margin-right: auto; }
            .hero-actions { justify-content: center; }
            .hero-features {
                grid-template-columns: 1fr;
                max-width: 280px;
                margin-left: auto;
                margin-right: auto;
                text-align: left;
            }
            .hero-image img { max-height: 260px; }
        }
        @media (max-width: 480px) {
            .hero-text h1 { font-size: 1.8rem; }
            .btn {
                padding: 12px 24px;
                font-size: 0.85rem;
                width: 100%;
                justify-content: center;
            }
            .hero-actions { flex-direction: column; align-items: stretch; }
        }
        /* ============================================================
           HIGHLIGHTS (3核心优势)
           ============================================================ */
        .highlights {
            padding: 80px 0 60px;
            background: #f5f5f7;
        }
        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .highlight-card {
            background: #ffffff;
            border-radius: 24px;
            padding: 36px 28px 32px;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.03);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: all 0.35s ease;
            text-align: center;
        }
        .highlight-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
        }
        .highlight-card .icon-box {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: #f0f0f2;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 30px;
            transition: 0.2s ease;
        }
        .highlight-card:hover .icon-box {
            background: #0066cc;
            color: #fff;
        }
        .highlight-card .stat {
            font-weight: 800;
            font-size: 2.0rem;
            color: #1d1d1f;
            line-height: 1.2;
        }
        .highlight-card .stat .unit {
            font-size: 0.8rem;
            font-weight: 500;
            color: #86868b;
        }
        .highlight-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #1d1d1f;
            margin: 6px 0 4px;
        }
        .highlight-card h3 .sub {
            display: block;
            font-weight: 400;
            font-size: 0.78rem;
            color: #86868b;
        }
        .highlight-card p {
            color: #86868b;
            font-size: 0.9rem;
            line-height: 1.7;
            margin-top: 4px;
        }
        .highlight-card .tag {
            display: inline-block;
            font-size: 0.6rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            padding: 4px 16px;
            border-radius: 100px;
            margin-top: 14px;
            background: #e8e8ed;
            color: #1d1d1f;
        }
        .highlight-card .tag.accent-tag {
            background: #dbeafe;
            color: #0066cc;
        }
        @media (max-width: 1024px) {
            .highlights-grid {
                grid-template-columns: 1fr 1fr;
            }
            .highlights-grid .highlight-card:last-child {
                grid-column: span 2;
                max-width: 480px;
                margin: 0 auto;
            }
        }
        @media (max-width: 768px) {
            .highlights-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
                margin: 0 auto;
            }
            .highlights-grid .highlight-card:last-child {
                grid-column: 1;
                max-width: 100%;
            }
        }
        /* ============================================================
           KEY FEATURES – PC工作流
           ============================================================ */
        .features-section {
            padding: 80px 0;
            background: #ffffff;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-top: 12px;
        }
        .feature-card {
            background: #f8f8fa;
            border-radius: 28px;
            padding: 36px 32px 32px;
            border: 1px solid #f0f0f2;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.05);
        }
        .feature-card .card-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.75rem;
            letter-spacing: 0.6px;
            text-transform: uppercase;
            align-self: flex-start;
            margin-bottom: 18px;
        }
        .badge-pc {
            background: #eef6ff;
            color: #2A5CAA;
        }
        .badge-tag {
            background: #e8f5e9;
            color: #1a7a4c;
        }
        .feature-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #1d1d1f;
            margin-bottom: 6px;
        }
        .feature-card .card-sub {
            font-size: 0.9rem;
            color: #86868b;
            margin-bottom: 18px;
        }
        .feature-card ul {
            list-style: none;
            padding: 0;
            margin-bottom: 20px;
            flex: 1;
        }
        .feature-card ul li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 0;
            border-bottom: 1px solid #f0f0f2;
            font-size: 0.92rem;
            color: #424245;
        }
        .feature-card ul li:last-child {
            border-bottom: none;
        }
        .feature-card ul li .li-icon {
            color: #0066cc;
            font-weight: 600;
            font-size: 1.1rem;
            width: 24px;
            text-align: center;
            flex-shrink: 0;
        }
        .feature-media {
            display: flex;
            gap: 20px;
            align-items: stretch;
            margin: 16px 0 20px;
            background: #ffffff;
            border-radius: 16px;
            padding: 16px;
            border: 1px solid #f0f0f2;
            flex-wrap: wrap;
        }
        .feature-media .qr-box {
            flex: 0 0 100px;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .feature-media .qr-box img {
            width: 100px;
            height: 100px;
            object-fit: contain;
            border-radius: 8px;
            background: white;
            padding: 4px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .feature-media .qr-box .qr-label {
            font-size: 0.6rem;
            color: #a1a1a6;
            margin-top: 4px;
        }
        .feature-media .video-box {
            flex: 1;
            min-width: 160px;
        }
        .feature-media .video-box .video-player {
            position: relative;
            width: 100%;
            padding-bottom: 56.25%;
            background: #111;
            border-radius: 10px;
            overflow: hidden;
            cursor: pointer;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            transition: box-shadow 0.3s ease;
        }
        .feature-media .video-box .video-player:hover {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
        }
        .feature-media .video-box .video-player .video-thumb {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .feature-media .video-box .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;
        }
        .feature-media .video-box .video-player:hover .play-overlay {
            background: rgba(0, 0, 0, 0.12);
        }
        .feature-media .video-box .video-player .play-btn {
            width: 52px;
            height: 52px;
            background: rgba(255, 255, 255, 0.92);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }
        .feature-media .video-box .video-player:hover .play-btn {
            transform: scale(1.06);
        }
        .feature-media .video-box .video-player .play-btn svg {
            width: 28px;
            height: 28px;
            margin-left: 3px;
            filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.1));
        }
        .feature-media .video-box .video-player iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: none;
            border-radius: 10px;
        }
        .feature-media .video-box .video-label {
            font-size: 0.7rem;
            color: #a1a1a6;
            text-align: center;
            margin-top: 6px;
        }
        .feature-card .btn {
            align-self: flex-start;
            margin-top: 4px;
        }
        .feature-compat-note {
            margin-top: 32px;
            padding: 16px 24px;
            background: #fafafa;
            border-radius: 16px;
            border: 1px solid #f0f0f2;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            font-size: 0.88rem;
            color: #555;
            line-height: 1.6;
        }
        .feature-compat-note .note-icon {
            font-size: 1.4rem;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .feature-compat-note strong {
            color: #b33c3c;
        }
        .feature-compat-note .model-badge {
            display: inline-block;
            font-family: 'Inter', monospace;
            font-weight: 700;
            background: #1d1d1f;
            color: #fff;
            padding: 1px 12px;
            border-radius: 20px;
            font-size: 0.7rem;
            letter-spacing: 0.3px;
            margin: 0 2px;
        }
        .feature-compat-note .highlight-red {
            font-weight: 700;
            color: #c0392b;
            background: rgba(192, 57, 43, 0.06);
            padding: 1px 8px;
            border-radius: 4px;
        }
        .feature-compat-note .note-divider {
            border: 0;
            border-top: 1px solid #e8e8ed;
            margin: 8px 0;
        }
        @media (max-width: 1024px) {
            .feature-grid { gap: 24px; }
        }
        @media (max-width: 768px) {
            .feature-grid {
                grid-template-columns: 1fr;
                max-width: 560px;
                margin: 0 auto;
            }
            .feature-card { padding: 28px 24px 24px; }
            .feature-media { flex-direction: column; align-items: stretch; padding: 14px; }
            .feature-media .qr-box { flex: 1 1 auto; display: flex; flex-direction: column; align-items: center; }
            .feature-media .qr-box img { width: 120px; height: 120px; }
            .feature-card .btn { align-self: center; width: 100%; justify-content: center; }
            .feature-compat-note { flex-direction: column; align-items: center; text-align: center; padding: 16px 18px; }
            .feature-compat-note .note-icon { font-size: 1.8rem; }
        }
        @media (max-width: 480px) {
            .feature-card h3 { font-size: 1.25rem; }
            .feature-media .qr-box img { width: 100px; height: 100px; }
            .feature-compat-note { font-size: 0.82rem; padding: 14px; }
        }
        /* ============================================================
           TECH SPECS
           ============================================================ */
        .specs-section {
            padding: 80px 0;
            background: #f5f5f7;
        }
        .specs-card {
            background: #ffffff;
            border-radius: 28px;
            padding: 32px 28px;
            border: 1px solid #f0f0f2;
            overflow-x: auto;
        }
        .specs-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.85rem;
            min-width: 500px;
        }
        .specs-table th {
            text-align: left;
            padding: 16px 16px 16px 0;
            font-weight: 700;
            color: #1d1d1f;
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.6px;
            border-bottom: 2px solid #d2d2d7;
        }
        .specs-table td {
            padding: 14px 16px 14px 0;
            border-bottom: 1px solid #e8e8ed;
            color: #424245;
        }
        .specs-table tr:last-child td {
            border-bottom: 0;
        }
        .specs-table .param {
            font-weight: 600;
            color: #1d1d1f;
            width: 30%;
        }
        @media (max-width: 768px) {
            .specs-table { font-size: 0.75rem; min-width: auto; }
            .specs-table th, .specs-table td { padding: 10px 8px 10px 0; }
        }
        /* ============================================================
           DRAWING
           ============================================================ */
        .drawing-section {
            padding: 80px 0;
            background: #ffffff;
        }
        .drawing-wrapper {
            max-width: 700px;
            margin: 0 auto;
            background: #f5f5f7;
            border-radius: 24px;
            padding: 28px;
            border: 1px solid #f0f0f2;
            text-align: center;
        }
        .drawing-wrapper img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            background: #fff;
            padding: 12px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .drawing-label {
            display: block;
            font-weight: 600;
            font-size: 0.85rem;
            color: #86868b;
            letter-spacing: 0.8px;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        /* ============================================================
           APPLICATIONS
           ============================================================ */
        .apps-section {
            padding: 80px 0;
            background: #f5f5f7;
        }
        .apps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .app-card {
            background: #ffffff;
            border-radius: 24px;
            padding: 32px 24px;
            text-align: center;
            border: 1px solid #f0f0f2;
            transition: all 0.3s ease;
        }
        .app-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
        }
        .app-card img {
            max-width: 100%;
            height: auto;
            margin-bottom: 12px;
            border-radius: 8px;
        }
        .app-card h4 {
            font-weight: 600;
            font-size: 1.1rem;
            color: #1d1d1f;
            margin-bottom: 6px;
        }
        .app-card p {
            font-size: 0.9rem;
            color: #86868b;
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .apps-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .apps-grid {
                grid-template-columns: 1fr;
                max-width: 380px;
                margin: 0 auto;
            }
        }
        /* ============================================================
           SUSTAINABILITY
           ============================================================ */
        .sustain-section {
            padding: 80px 0;
            background: #ffffff;
        }
        .sustain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .sustain-card {
            background: #f5f5f7;
            border-radius: 24px;
            padding: 32px 24px;
            text-align: center;
            border: 1px solid #f0f0f2;
        }
        .sustain-card .sustain-emoji {
            font-size: 2.6rem;
            display: block;
            margin-bottom: 12px;
        }
        .sustain-card h4 {
            font-weight: 600;
            font-size: 1.05rem;
            color: #1d1d1f;
            margin-bottom: 6px;
        }
        .sustain-card p {
            font-size: 0.9rem;
            color: #86868b;
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .sustain-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .sustain-grid {
                grid-template-columns: 1fr;
                max-width: 380px;
                margin: 0 auto;
            }
        }
        /* ============================================================
           DOWNLOADS
           ============================================================ */
        .downloads-section {
            padding: 80px 0;
            background: #f5f5f7;
        }
        .downloads-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            max-width: 900px;
            margin: 0 auto;
        }
        .download-group {
            background: #ffffff;
            border-radius: 20px;
            padding: 24px 28px;
            border: 1px solid #f0f0f2;
        }
        .download-group h4 {
            font-weight: 600;
            font-size: 0.9rem;
            color: #1d1d1f;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
            border-bottom: 1px solid #e8e8ed;
            padding-bottom: 10px;
        }
        .download-group ul {
            list-style: none;
            padding: 0;
        }
        .download-group ul li {
            margin-bottom: 10px;
            padding: 6px 0;
            border-bottom: 1px solid #f0f0f2;
        }
        .download-group ul li:last-child {
            border-bottom: 0;
            margin-bottom: 0;
        }
        .download-group ul li a {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.88rem;
            color: #1d1d1f;
            font-weight: 500;
            text-decoration: none;
            transition: all 0.2s ease;
        }
        .download-group ul li a:hover {
            color: #0066cc;
            transform: translateX(4px);
        }
        .download-group ul li a .dl-icon {
            font-size: 1.1rem;
            flex-shrink: 0;
            width: 28px;
            text-align: center;
        }
        .download-group ul li a .dl-desc {
            font-weight: 400;
            color: #86868b;
            font-size: 0.75rem;
            display: block;
        }
        .download-note {
            grid-column: 1 / -1;
            text-align: center;
            margin-top: 8px;
            font-size: 0.85rem;
            color: #86868b;
        }
        .download-note a {
            color: #0066cc;
            text-decoration: none;
        }
        .download-note a:hover {
            text-decoration: underline;
        }
        @media (max-width: 1024px) {
            .downloads-grid {
                grid-template-columns: 1fr;
                max-width: 600px;
            }
        }
        /* ============================================================
           RECOMMENDED – 7个兼容标签（6个已知 + 1个预留）
           ============================================================ */
        .rec-section {
            padding: 60px 0 80px;
            background: #ffffff;
        }
        .rec-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .rec-card {
            background: #f5f5f7;
            border-radius: 20px;
            padding: 20px;
            text-align: center;
            border: 1px solid #f0f0f2;
            transition: all 0.2s ease;
        }
        .rec-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
        }
        .rec-card img {
            max-height: 80px;
            margin: 0 auto 12px;
            object-fit: contain;
        }
        .rec-card h5 {
            font-weight: 600;
            font-size: 0.9rem;
            color: #1d1d1f;
        }
        .rec-card a {
            font-size: 0.8rem;
            color: #0066cc;
            text-decoration: none;
            display: inline-block;
            margin-top: 6px;
        }
        .rec-card a:hover {
            text-decoration: underline;
        }
        /* 占位卡片特殊样式 */
        .rec-card.placeholder {
            background: #fafafa;
            border: 1px dashed #d2d2d7;
        }
        .rec-card.placeholder .placeholder-icon {
            font-size: 2.4rem;
            margin-bottom: 8px;
            color: #a1a1a6;
        }
        .rec-card.placeholder h5 {
            color: #86868b;
            font-weight: 400;
        }
        @media (max-width: 1024px) {
            .rec-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .rec-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 480px) {
            .rec-grid {
                grid-template-columns: 1fr;
                max-width: 260px;
                margin: 0 auto;
            }
        }
        /* ============================================================
           ABOUT / CONTACT
           ============================================================ */
        .about-section {
            padding: 80px 0;
            background: #f5f5f7;
            text-align: center;
        }
        .about-box {
            background: #ffffff;
            border-radius: 28px;
            padding: 40px;
            max-width: 640px;
            margin: 0 auto;
            border: 1px solid #f0f0f2;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.02);
        }
        .about-box .email {
            font-size: 1.3rem;
            font-weight: 600;
            color: #1d1d1f;
        }
        .about-box .email a {
            color: #0066cc;
            text-decoration: none;
        }
        .about-box .email a:hover {
            text-decoration: underline;
        }
        .about-box .cert {
            font-size: 0.85rem;
            color: #86868b;
            border-top: 1px solid #e8e8ed;
            padding-top: 20px;
            margin-top: 20px;
        }
        .about-box .btn {
            margin-top: 20px;
        }
        .about-footer {
            margin-top: 32px;
            font-size: 0.75rem;
            color: #a1a1a6;
        }
        @media (max-width: 768px) {
            .about-box { padding: 24px; }
            .about-box .email { font-size: 1.1rem; }
        }
        /* ============================================================
           GENERAL RESPONSIVE OVERRIDES
           ============================================================ */
        @media (max-width: 1024px) {
            .section-title { font-size: 2.2rem; }
        }
        @media (max-width: 480px) {
            .section-title { font-size: 1.8rem; }
            .highlight-card { padding: 24px 18px; }
        }