/* roulang page: index */
:root {
            --color-primary: #ff4d2d;
            --color-primary-hover: #e03a1c;
            --color-primary-light: #fff5f2;
            --color-dark: #0d0f24;
            --color-dark-card: #151830;
            --color-dark-surface: #1a1d35;
            --color-gold: #f0a500;
            --color-gold-light: #fef9e7;
            --color-white: #ffffff;
            --color-gray-50: #f9fafb;
            --color-gray-100: #f3f4f6;
            --color-gray-200: #e5e7eb;
            --color-gray-300: #d1d5db;
            --color-gray-400: #9ca3af;
            --color-gray-500: #6b7280;
            --color-gray-600: #4b5563;
            --color-gray-700: #374151;
            --color-gray-800: #1f2937;
            --color-gray-900: #111827;
            --color-text: #1f2937;
            --color-text-light: #6b7280;
            --color-text-on-dark: #e5e7eb;
            --color-border: #e5e7eb;
            --color-border-light: #f3f4f6;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --radius-2xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.07);
            --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.14);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
            --font-xs: 0.78rem;
            --font-sm: 0.875rem;
            --font-base: 1rem;
            --font-lg: 1.125rem;
            --font-xl: 1.25rem;
            --font-2xl: 1.5rem;
            --font-3xl: 1.875rem;
            --font-4xl: 2.25rem;
            --font-5xl: 3rem;
            --font-6xl: 3.75rem;
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            font-size: var(--font-base);
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-white);
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

        .container-custom {
            width: 100%;
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        @media (min-width: 640px) {
            .container-custom {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        @media (min-width: 1280px) {
            .container-custom {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        /* ========== 导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(13, 15, 36, 0.94);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(13, 15, 36, 0.98);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
            border-bottom-color: rgba(255, 255, 255, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        @media (min-width: 640px) {
            .header-inner {
                padding: 0 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .header-inner {
                padding: 0 2rem;
            }
        }
        @media (min-width: 1280px) {
            .header-inner {
                padding: 0 2.5rem;
            }
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 800;
            font-size: 1.35rem;
            color: #ffffff;
            letter-spacing: 0.03em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
            text-decoration: none;
        }
        .logo-link:hover {
            opacity: 0.88;
            color: #ffffff;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #ff4d2d 0%, #f0a500 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
        }
        .logo-text {
            display: inline;
        }
        @media (max-width: 420px) {
            .logo-text {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                border-radius: 8px;
                font-size: 1rem;
            }
        }

        .nav-desktop {
            display: none;
            align-items: center;
            gap: 0.25rem;
        }
        @media (min-width: 768px) {
            .nav-desktop {
                display: flex;
            }
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1rem;
            border-radius: 8px;
            font-size: 0.925rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.78);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
            text-decoration: none;
        }
        .nav-link:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.07);
        }
        .nav-link:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 8px;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1.35rem;
            border-radius: 22px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #ffffff;
            background: var(--color-primary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
            text-decoration: none;
            margin-left: 0.5rem;
        }
        .nav-cta-btn:hover {
            background: var(--color-primary-hover);
            color: #ffffff;
            box-shadow: 0 4px 16px rgba(255, 77, 45, 0.4);
            transform: translateY(-1px);
        }
        .nav-cta-btn:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
        }

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            color: #ffffff;
            font-size: 1.3rem;
            transition: all var(--transition-fast);
            border: 1px solid rgba(255, 255, 255, 0.12);
        }
        .mobile-menu-btn:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .mobile-menu-btn:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }
        @media (min-width: 768px) {
            .mobile-menu-btn {
                display: none;
            }
        }

        /* 移动端菜单面板 */
        .mobile-menu-panel {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(13, 15, 36, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            flex-direction: column;
            padding: 1.5rem 1.25rem;
            gap: 0.4rem;
            overflow-y: auto;
        }
        .mobile-menu-panel.open {
            display: flex;
        }
        @media (min-width: 768px) {
            .mobile-menu-panel.open {
                display: none;
            }
        }
        .mobile-nav-link {
            display: block;
            padding: 0.9rem 1.2rem;
            border-radius: 12px;
            font-size: 1.05rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.82);
            transition: all var(--transition-fast);
            text-decoration: none;
            letter-spacing: 0.02em;
        }
        .mobile-nav-link:hover,
        .mobile-nav-link:active {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }
        .mobile-nav-cta {
            display: block;
            margin-top: 0.8rem;
            padding: 0.9rem 1.5rem;
            border-radius: 24px;
            font-size: 1rem;
            font-weight: 600;
            color: #ffffff;
            background: var(--color-primary);
            text-align: center;
            transition: all var(--transition-fast);
            text-decoration: none;
            letter-spacing: 0.02em;
        }
        .mobile-nav-cta:hover {
            background: var(--color-primary-hover);
            box-shadow: 0 4px 16px rgba(255, 77, 45, 0.4);
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 4rem 0;
        }
        @media (min-width: 768px) {
            .section {
                padding: 5.5rem 0;
            }
        }
        @media (min-width: 1024px) {
            .section {
                padding: 7rem 0;
            }
        }
        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-primary);
            margin-bottom: 0.75rem;
            padding: 0.3rem 0.9rem;
            background: var(--color-primary-light);
            border-radius: 20px;
        }
        .section-title {
            font-size: 1.65rem;
            font-weight: 800;
            color: var(--color-gray-900);
            letter-spacing: 0.02em;
            line-height: 1.3;
            margin-bottom: 0.75rem;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .section-title {
                font-size: 2.4rem;
            }
        }
        .section-desc {
            font-size: 1rem;
            color: var(--color-text-light);
            line-height: 1.75;
            max-width: 640px;
        }
        @media (min-width: 768px) {
            .section-desc {
                font-size: 1.08rem;
            }
        }

        /* ========== Hero ========== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: var(--nav-height);
            overflow: hidden;
            background-color: #0a0c1a;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.38;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg,
                    rgba(10, 12, 26, 0.75) 0%,
                    rgba(13, 15, 36, 0.88) 40%,
                    rgba(13, 15, 36, 0.96) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 2rem 0 3rem;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1rem;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: rgba(255, 77, 45, 0.18);
            color: #ff8a6e;
            border: 1px solid rgba(255, 77, 45, 0.3);
            margin-bottom: 1.25rem;
            animation: pulseBadge 2.2s ease-in-out infinite;
        }
        @keyframes pulseBadge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 77, 45, 0.35);
            }
            50% {
                box-shadow: 0 0 0 12px rgba(255, 77, 45, 0);
            }
        }
        .hero-badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #ff4d2d;
            animation: blinkDot 1.4s ease-in-out infinite;
        }
        @keyframes blinkDot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }
        .hero-title {
            font-size: 2.2rem;
            font-weight: 900;
            color: #ffffff;
            line-height: 1.2;
            letter-spacing: 0.03em;
            margin-bottom: 1rem;
            max-width: 720px;
        }
        @media (min-width: 640px) {
            .hero-title {
                font-size: 2.8rem;
            }
        }
        @media (min-width: 768px) {
            .hero-title {
                font-size: 3.3rem;
            }
        }
        @media (min-width: 1024px) {
            .hero-title {
                font-size: 3.8rem;
            }
        }
        .hero-title .highlight {
            color: #ff4d2d;
            position: relative;
        }
        .hero-subtitle {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.72);
            line-height: 1.7;
            max-width: 560px;
            margin-bottom: 2rem;
        }
        @media (min-width: 768px) {
            .hero-subtitle {
                font-size: 1.15rem;
            }
        }
        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 1.8rem;
            border-radius: 26px;
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
            cursor: pointer;
            border: none;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
        }
        .btn-primary {
            background: #ff4d2d;
            color: #ffffff;
            box-shadow: 0 6px 24px rgba(255, 77, 45, 0.35);
        }
        .btn-primary:hover {
            background: #e03a1c;
            box-shadow: 0 10px 32px rgba(255, 77, 45, 0.5);
            transform: translateY(-2px);
        }
        .btn-outline-light {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.35);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
        }
        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        @media (min-width: 640px) {
            .hero-stats-row {
                gap: 2.5rem;
            }
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-num {
            font-size: 1.6rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.02em;
        }
        @media (min-width: 768px) {
            .hero-stat-num {
                font-size: 2rem;
            }
        }
        .hero-stat-label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 0.04em;
        }

        /* ========== 卡片通用 ========== */
        .card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: #e0e0e0;
        }
        .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #f3f4f6;
        }
        .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .card:hover .card-img-wrap img {
            transform: scale(1.06);
        }
        .card-body {
            padding: 1.3rem;
        }
        @media (min-width: 768px) {
            .card-body {
                padding: 1.5rem;
            }
        }
        .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            color: #ff4d2d;
            background: #fff5f2;
            padding: 0.25rem 0.7rem;
            border-radius: 14px;
            margin-bottom: 0.5rem;
        }
        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: #1f2937;
            line-height: 1.4;
            margin-bottom: 0.4rem;
        }
        .card-desc {
            font-size: 0.9rem;
            color: #6b7280;
            line-height: 1.6;
        }

        /* ========== 深色卡片 ========== */
        .card-dark {
            background: var(--color-dark-card);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            transition: all var(--transition-base);
            color: #e5e7eb;
        }
        .card-dark:hover {
            border-color: rgba(255, 255, 255, 0.15);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
            transform: translateY(-2px);
        }
        .card-dark .card-title {
            color: #ffffff;
        }
        .card-dark .card-desc {
            color: rgba(255, 255, 255, 0.6);
        }
        .card-dark .card-tag {
            background: rgba(255, 77, 45, 0.2);
            color: #ff8a6e;
        }

        /* ========== 数据卡片 ========== */
        .stat-card {
            text-align: center;
            padding: 1.5rem 1rem;
            background: #ffffff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .stat-num {
            font-size: 2.2rem;
            font-weight: 900;
            color: #ff4d2d;
            letter-spacing: 0.02em;
            line-height: 1;
        }
        @media (min-width: 768px) {
            .stat-num {
                font-size: 2.8rem;
            }
        }
        .stat-label {
            font-size: 0.9rem;
            color: #6b7280;
            margin-top: 0.4rem;
            font-weight: 500;
        }

        /* ========== 流程步骤 ========== */
        .step-item {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            padding: 1.2rem 0;
            border-bottom: 1px solid #f3f4f6;
            transition: all var(--transition-fast);
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #fff5f2;
            color: #ff4d2d;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            transition: all var(--transition-base);
        }
        .step-item:hover .step-num {
            background: #ff4d2d;
            color: #ffffff;
            box-shadow: 0 4px 16px rgba(255, 77, 45, 0.35);
        }
        .step-info h4 {
            font-weight: 700;
            color: #1f2937;
            margin-bottom: 0.2rem;
            font-size: 1rem;
        }
        .step-info p {
            font-size: 0.9rem;
            color: #6b7280;
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-item {
            border-bottom: 1px solid #e5e7eb;
            transition: all var(--transition-fast);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.15rem 0;
            font-weight: 600;
            font-size: 1rem;
            color: #1f2937;
            text-align: left;
            background: transparent;
            border: none;
            cursor: pointer;
            transition: color var(--transition-fast);
            letter-spacing: 0.02em;
            gap: 1rem;
        }
        .faq-question:hover {
            color: #ff4d2d;
        }
        .faq-question:focus-visible {
            outline: 2px solid #ff4d2d;
            outline-offset: 4px;
            border-radius: 4px;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #f3f4f6;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: all var(--transition-base);
            color: #6b7280;
        }
        .faq-item.active .faq-icon {
            background: #ff4d2d;
            color: #ffffff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            color: #6b7280;
            font-size: 0.95rem;
            line-height: 1.7;
            padding: 0 0;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 0 1.1rem 0;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, #0d0f24 0%, #1a1d38 50%, #0d0f24 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 77, 45, 0.08);
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(240, 165, 0, 0.06);
            pointer-events: none;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0a0c1a;
            color: rgba(255, 255, 255, 0.6);
            padding: 3rem 0 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        @media (min-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (min-width: 1024px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr 1fr;
            }
        }
        .footer-brand-name {
            font-weight: 800;
            font-size: 1.3rem;
            color: #ffffff;
            letter-spacing: 0.03em;
        }
        .footer-desc {
            font-size: 0.88rem;
            line-height: 1.7;
            margin-top: 0.5rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-col-title {
            font-weight: 700;
            font-size: 0.9rem;
            color: #ffffff;
            letter-spacing: 0.04em;
            margin-bottom: 0.8rem;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            padding: 0.3rem 0;
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .footer-col a:hover {
            color: #ff8a6e;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ========== 响应式补充 ========== */
        @media (max-width: 767px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .btn {
                padding: 0.7rem 1.4rem;
                font-size: 0.88rem;
                border-radius: 22px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .card-body {
                padding: 1rem;
            }
            .stat-num {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.5rem;
            }
            .hero-stats-row {
                gap: 1rem;
            }
            .hero-stat-num {
                font-size: 1.3rem;
            }
            .hero-btns {
                flex-direction: column;
                width: 100%;
            }
            .hero-btns .btn {
                width: 100%;
                justify-content: center;
                text-align: center;
            }
            .btn {
                padding: 0.7rem 1.2rem;
                font-size: 0.85rem;
            }
            .section {
                padding: 2.5rem 0;
            }
            .card-img-wrap {
                aspect-ratio: 16 / 9;
            }
        }

        /* 图片加载优化 */
        .card-img-wrap img {
            background: #e5e7eb;
        }
        .hero-bg {
            background-color: #0a0c1a;
        }

        /* 可访问性 */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }