:root {
            --primary-color: #e53e3e;
            --primary-hover: #c53030;
            --accent-blue: #2563eb;
            --accent-blue-dark: #1d4ed8;
            --text-dark: #1a1a2e;
            --text-muted: #4b5563;
            --bg-light: #f8fafc;
            --bg-gradient: radial-gradient(circle at 80% 50%, #e0f2fe 0%, #ffffff 70%);
            --card-bg: #ffffff;
            --border-color: #e5e7eb;
            --gold: #f59e0b;
            --gold-light: #fef3c7;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Noto Sans SC', sans-serif;
            color: var(--text-dark);
            background-color: #ffffff;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            line-height: 1.6;
        }

        /* ========== HEADER ========== */
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 40px;
            margin: 0 auto;
            width: 100%;
            position: fixed;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            z-index: 100;
            background: rgba(239, 248, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.03);
        }
        .header-left,
        .header-right {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 22px;
            color: #0640b7;
            text-decoration: none;
            white-space: nowrap;
        }
        .logo svg {
            width: auto;
            height: auto;
            display: block;
            color: #3e5fff;
        }
        .nav-links {
            display: flex;
            gap: 20px;
            list-style: none;
            flex-wrap: wrap;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            cursor: pointer;
            white-space: nowrap;
            transition: color 0.2s;
        }
        .nav-item:hover {
            color: var(--accent-blue);
        }
        .nav-item a {
            color: inherit;
            text-decoration: none;
        }
        .nav-secondary {
            display: flex;
            align-items: center;
            gap: 18px;
            list-style: none;
            font-size: 13px;
        }
        .nav-secondary a {
            color: var(--text-dark);
            text-decoration: none;
            transition: color 0.2s;
        }
        .nav-secondary a:hover {
            color: var(--accent-blue);
        }
        .nav-secondary li {
            display: flex;
            align-items: center;
            gap: 4px;
            cursor: pointer;
            white-space: nowrap;
        }
        .lang-selector {
            display: flex;
            align-items: center;
            cursor: pointer;
            gap: 4px;
        }
        .btn-primary {
            background-color: var(--primary-color);
            color: #ffffff;
            padding: 11px 26px;
            border-radius: 9999px;
            font-weight: 700;
            text-decoration: none;
            font-size: 14px;
            transition: all 0.25s;
            border: none;
            cursor: pointer;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(229, 62, 62, 0.3);
            display: inline-block;
            text-align: center;
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(229, 62, 62, 0.4);
        }
        .btn-outline {
            background-color: transparent;
            color: var(--accent-blue);
            padding: 10px 24px;
            border-radius: 9999px;
            font-weight: 700;
            text-decoration: none;
            font-size: 14px;
            border: 2px solid var(--accent-blue);
            cursor: pointer;
            transition: all 0.25s;
            white-space: nowrap;
            display: inline-block;
            text-align: center;
        }
        .btn-outline:hover {
            background-color: var(--accent-blue);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
        }
        .btn-accent {
            background-color: var(--accent-blue);
            color: #ffffff;
            padding: 11px 26px;
            border-radius: 9999px;
            font-weight: 700;
            text-decoration: none;
            font-size: 14px;
            transition: all 0.25s;
            border: none;
            cursor: pointer;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
            display: inline-block;
            text-align: center;
        }
        .btn-accent:hover {
            background-color: var(--accent-blue-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
        }

        /* ========== HERO ========== */
        .hero-section {
            background: var(--bg-gradient);
            padding: 150px 40px 90px 40px;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background-image: url(../img/hero-phone-mockup-country-protected-lg-zh.avif);
            background-repeat: no-repeat;
            background-size: cover;
            background-position: center right;
            position: relative;
        }
        .hero-container {
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-content {
            display: flex;
            flex-direction: column;
        }
        .rating-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            margin-bottom: 20px;
            background: #fff;
            padding: 8px 16px;
            border-radius: 9999px;
            width: fit-content;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
        }
        .rating-badge .star {
            color: #ff4a7d;
            font-size: 16px;
        }
        .rating-badge .brand-tech {
            font-weight: 700;
            color: #111827;
        }
        .hero-title {
            font-size: 50px;
            font-weight: 700;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 24px;
            color: #0f172a;
        }
        .hero-subtitle {
            font-size: 17px;
            color: var(--text-muted);
            margin-bottom: 28px;
            line-height: 1.7;
            max-width: 500px;
        }
        .hero-features {
            list-style: none;
            margin-bottom: 28px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .hero-features li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-dark);
            line-height: 1.5;
        }
        .hero-features li::before {
            content: "✓";
            color: #10b981;
            font-weight: bold;
            flex-shrink: 0;
            margin-top: 1px;
        }
        .promo-banner {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 24px;
            width: fit-content;
            background: #fff;
            padding: 10px 18px;
            border-radius: 12px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
        }
        .promo-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid #b5cdf5;
            flex-shrink: 0;
        }
        .promo-icon2 {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid #b5cdf5;
        }
        .promo-text {
            font-size: 17px;
            font-weight: 700;
            color: #1e293b;
        }
        .hero-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }
        .hero-btn-group .btn-primary {
            padding: 15px 36px;
            font-size: 16px;
        }
        .hero-btn-group .btn-outline {
            padding: 14px 34px;
            font-size: 16px;
        }
        .hero-image-container {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-badge-float {
            position: absolute;
            background: #fff;
            border-radius: 12px;
            padding: 12px 16px;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.1);
            font-size: 13px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            animation: floatBadge 3s ease-in-out infinite;
        }
        .hero-badge-float.top-right {
            top: 10%;
            right: 5%;
            animation-delay: 0s;
        }
        .hero-badge-float.bottom-left {
            bottom: 15%;
            left: 0%;
            animation-delay: 1.5s;
        }
        @keyframes floatBadge {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-14px);
            }
        }
        .hero-badge-float .badge-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #10b981;
            animation: pulseDot 1.8s ease-in-out infinite;
        }
        @keyframes pulseDot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
            }
            50% {
                box-shadow: 0 0 0 12px rgba(16, 185, 129, 0);
            }
        }

        /* ========== SECTION 通用 ========== */
        .section-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 80px 40px;
        }
        .section-title {
            font-size: 38px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #0f172a;
            text-align: center;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            text-align: center;
            margin-bottom: 48px;
            line-height: 1.6;
        }

        /* ========== 定价版块 ========== */
        .pricing-section {
            background: #f8fafc;
            padding: 80px 40px;
            position: relative;
            overflow: hidden;
        }
        .pricing-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }
        .pricing-container {
            max-width: 1100px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            align-items: stretch;
        }
        .pricing-card {
            background: #fff;
            border-radius: 20px;
            border: 2px solid var(--border-color);
            padding: 36px 28px;
            display: flex;
            flex-direction: column;
            text-align: center;
            transition: all 0.35s;
            position: relative;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
        }
        .pricing-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            border-color: #cbd5e1;
        }
        .pricing-card.featured {
            border-color: var(--accent-blue);
            box-shadow: 0 12px 36px rgba(37, 99, 235, 0.18);
            transform: scale(1.04);
            z-index: 2;
            background: #fff;
        }
        .pricing-card.featured:hover {
            transform: scale(1.04) translateY(-8px);
            box-shadow: 0 20px 48px rgba(37, 99, 235, 0.25);
        }
        .pricing-badge {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent-blue);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            padding: 6px 20px;
            border-radius: 9999px;
            white-space: nowrap;
            letter-spacing: 0.5px;
        }
        .pricing-plan-name {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 6px;
            color: #1e293b;
        }
        .pricing-plan-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .pricing-price {
            font-size: 48px;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 4px;
            line-height: 1;
        }
        .pricing-price .currency {
            font-size: 22px;
            vertical-align: super;
            font-weight: 500;
        }
        .pricing-price .period {
            font-size: 15px;
            color: var(--text-muted);
            font-weight: 400;
        }
        .pricing-original {
            font-size: 14px;
            color: #94a3b8;
            text-decoration: line-through;
            margin-bottom: 8px;
        }
        .pricing-save {
            font-size: 13px;
            color: #10b981;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .pricing-features-list {
            list-style: none;
            text-align: left;
            margin-bottom: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .pricing-features-list li {
            font-size: 14px;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.4;
        }
        .pricing-features-list li::before {
            content: "✓";
            color: #10b981;
            font-weight: bold;
            flex-shrink: 0;
            font-size: 13px;
        }
        .pricing-card .btn-accent,
        .pricing-card .btn-primary {
            width: 100%;
            padding: 14px 20px;
            font-size: 15px;
            text-align: center;
            display: block;
        }
        .pricing-guarantee {
            text-align: center;
            margin-top: 32px;
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .pricing-guarantee .guarantee-icon {
            font-size: 20px;
        }

        /* ========== FEATURES 区域 ========== */
        .features-section {
            padding: 80px 40px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .grid-container {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            grid-template-rows: auto auto;
            gap: 24px;
        }
        .card {
            background-color: var(--card-bg);
            border-radius: 16px;
            border: 1px solid var(--border-color);
            padding: 24px;
            display: flex;
            flex-direction: column;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px -1px rgba(0, 0, 0, 0.01);
            position: relative;
            overflow: hidden;
            transition: box-shadow 0.3s, transform 0.3s;
        }
        .card:hover {
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
            transform: translateY(-3px);
        }
        .gap-y-6 {
            display: flex;
            flex-direction: column;
            row-gap: 24px;
        }
        .card-tag {
            font-size: 12px;
            font-weight: 700;
            color: #2563eb;
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 16px;
        }
        .card-title {
            font-size: 21px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 20px;
        }
        .card-link {
            font-size: 14px;
            font-weight: 700;
            color: #2563eb;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 4px;
            margin-top: auto;
        }
        .card-user-profile {
            display: flex;
            flex-direction: column;
        }
        .card-user-profile .img-box {
            padding: 0px;
            width: 100%;
            height: 368px;
            background-color: #e2e8f0;
            position: relative;
            border-radius: 12px;
            overflow: hidden;
        }
        .card-user-profile .img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .card-user-profile .os-icons {
            width: 268px;
            height: 75px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 10px;
        }
        .card-user-profile .os-icons img {
            height: 42px;
        }
        .card-servers {
            background-color: #ffffff;
        }
        .card-servers .flag-row {
            margin: 16px 0;
        }
        .card-servers .flag-row img {
            height: 38px;
        }
        .card-map {
            grid-row: span 1;
            background-color: #f8fafc;
            padding: 0;
            height: 320px;
            position: relative;
            border-radius: 16px;
            overflow: hidden;
        }
        .card-map img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .card-dark-blue {
            grid-row: span 2;
            background: radial-gradient(circle at 50% 0%, #1e40af 0%, #0f172a 100%);
            color: #ffffff;
            border: none;
            display: flex;
            flex-direction: column;
            justify-content: flex-start;
        }
        .card-dark-blue .card-title {
            font-size: 26px;
            text-align: center;
            margin-top: 20px;
            margin-bottom: 32px;
            color: #fff;
        }
        .animatedTag {
            animation: rotateAnimation 2s linear infinite;
            transform-origin: top left;
        }
        .text-accent {
            color: #3e5fff;
        }
        @media (prefers-reduced-motion) {
            .animatedTag {
                animation: none;
            }
        }
        @keyframes rotateAnimation {
            0% {
                transform: rotate(0);
            }
            10% {
                transform: rotate(-10deg);
            }
            20% {
                transform: rotate(10deg);
            }
            30% {
                transform: rotate(-8deg);
            }
            40% {
                transform: rotate(8deg);
            }
            50% {
                transform: rotate(-6deg);
            }
            60% {
                transform: rotate(6deg);
            }
            70% {
                transform: rotate(-4deg);
            }
            80% {
                transform: rotate(4deg);
            }
            90% {
                transform: rotate(-1deg);
            }
            to {
                transform: rotate(1deg);
            }
        }
        .antivirus-banner {
            background: linear-gradient(135deg, #1e1b4b 0%, #311042 100%);
            border-radius: 16px;
            padding: 40px;
            color: #ffffff;
            margin-top: 48px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .antivirus-banner .banner-tag {
            font-size: 14px;
            color: #a5b4fc;
            font-weight: 500;
        }
        .antivirus-banner .banner-title {
            font-size: 32px;
            font-weight: 700;
        }
        .antivirus-banner .banner-desc {
            font-size: 16px;
            color: #cbd5e1;
            max-width: 800px;
            line-height: 1.6;
        }

        /* ========== 安装指南版块 ========== */
        .install-guide-section {
            padding: 80px 40px;
            background: #fff;
        }
        .install-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .install-step {
            text-align: center;
            position: relative;
            padding: 32px 20px;
            background: #fff;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
        }
        .install-step:hover {
            transform: translateY(-6px);
            box-shadow: 0 16px 36px rgba(0, 0, 0, 0.1);
            border-color: #cbd5e1;
        }
        .install-step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent-blue);
            color: #fff;
            font-size: 24px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 6px 18px rgba(37, 99, 235, 0.3);
        }
        .install-step h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: #1e293b;
        }
        .install-step p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .install-step .step-arrow {
            position: absolute;
            right: -22px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 28px;
            color: #cbd5e1;
            z-index: 1;
        }
        .install-step:last-child .step-arrow {
            display: none;
        }

        /* ========== 多平台下载版块 ========== */
        .platform-section {
            padding: 60px 40px 80px;
            background: #f8fafc;
        }
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 24px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .platform-item {
            background: #fff;
            border-radius: 16px;
            padding: 28px 16px;
            text-align: center;
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: all 0.3s;
            text-decoration: none;
            color: inherit;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }
        .platform-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 14px 32px rgba(0, 0, 0, 0.1);
            border-color: var(--accent-blue);
        }
        .platform-icon {
            font-size: 44px;
            line-height: 1;
        }
        .platform-name {
            font-weight: 700;
            font-size: 15px;
            color: #1e293b;
        }
        .platform-version {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ========== WHY VPN ========== */
        .why-vpn-section {
            padding: 80px 40px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .why-vpn-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 32px;
        }
        .why-card {
            display: flex;
            flex-direction: column;
            gap: 16px;
            padding: 28px;
            border-radius: 16px;
            background: #fff;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }
        .why-card:hover {
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.07);
            transform: translateY(-4px);
        }
        .why-card .why-icon {
            font-size: 40px;
            line-height: 1;
        }
        .why-card .why-title {
            font-size: 20px;
            font-weight: 700;
        }
        .why-card .why-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .threat-dashboard {
            background-color: #0f172a;
            border-radius: 24px;
            padding: 48px;
            color: #ffffff;
            margin-top: 64px;
        }
        .threat-title {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 40px;
            text-align: left;
        }
        .threat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
        }
        .threat-box {
            display: flex;
            flex-direction: column;
            gap: 16px;
            border-right: 1px solid #334155;
            padding-right: 20px;
        }
        .threat-box:last-child {
            border-right: none;
            padding-right: 0;
        }
        .threat-num {
            font-size: 52px;
            font-weight: 700;
            color: #3b82f6;
            line-height: 1;
        }
        .threat-label {
            font-size: 15px;
            color: #94a3b8;
            line-height: 1.6;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background-color: #0b0e17;
            color: #9ca3af;
            padding: 80px 40px 40px 40px;
            margin-top: 80px;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            border-bottom: 1px solid #22293a;
            padding-bottom: 48px;
        }
        .footer-col h4 {
            color: #ffffff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 24px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .footer-links a {
            color: #9ca3af;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.2s;
        }
        .footer-links a:hover {
            color: #ffffff;
        }
        .footer-bottom {
            text-align: center;
            padding-top: 32px;
            font-size: 13px;
            color: #6b7280;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1100px) {
            .pricing-grid {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 16px;
            }
            .pricing-card {
                padding: 24px 16px;
            }
            .pricing-card.featured {
                transform: scale(1.02);
            }
            .pricing-card.featured:hover {
                transform: scale(1.02) translateY(-6px);
            }
            .pricing-price {
                font-size: 36px;
            }
            .install-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .install-step .step-arrow {
                display: none;
            }
            .platform-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 1024px) {
            .hero-container {
                grid-template-columns: 1fr;
                text-align: center;
                padding-top: 40px;
            }
            .hero-features li,
            .promo-banner,
            .hero-btn-group {
                justify-content: center;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-subtitle {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .rating-badge {
                margin-left: auto;
                margin-right: auto;
            }
            .grid-container {
                grid-template-columns: 1fr 1fr;
            }
            .card-user-profile {
                grid-row: span 1;
            }
            .card-dark-blue {
                grid-column: span 2;
            }
            .why-vpn-grid,
            .threat-grid {
                grid-template-columns: 1fr;
            }
            .threat-box {
                border-right: none;
                border-bottom: 1px solid #334155;
                padding-bottom: 24px;
                padding-right: 0;
            }
            .threat-box:last-child {
                border-bottom: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
                margin: 0 auto;
                gap: 24px;
            }
            .pricing-card.featured {
                transform: scale(1);
            }
            .pricing-card.featured:hover {
                transform: scale(1) translateY(-6px);
            }
            .install-steps {
                grid-template-columns: 1fr 1fr;
            }
            .platform-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header {
                padding: 14px 16px;
                flex-wrap: wrap;
                gap: 10px;
            }
            .nav-links,
            .nav-secondary {
                display: none;
            }
            .hero-section {
                padding: 120px 20px 60px 20px;
            }
            .hero-title {
                font-size: 32px;
            }
            .grid-container {
                grid-template-columns: 1fr;
            }
            .card-dark-blue {
                grid-column: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .install-steps {
                grid-template-columns: 1fr;
            }
            .platform-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pricing-grid {
                max-width: 100%;
            }
            .section-title {
                font-size: 28px;
            }
            .hero-btn-group {
                flex-direction: column;
                align-items: center;
            }
            .hero-btn-group .btn-primary,
            .hero-btn-group .btn-outline {
                width: 100%;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .platform-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .platform-item {
                padding: 20px 10px;
            }
            .platform-icon {
                font-size: 34px;
            }
            .pricing-price {
                font-size: 32px;
            }
        }