/* roulang page: index */
:root {
            --neon-purple: #A020F0;
            --cyber-cyan: #00F0FF;
            --data-amber: #FF9F0A;
            --deep-space: #0A0E1A;
            --gold-star: #F0E6D2;
            --card-bg: #111827;
            --body-text: #B0B8C9;
            --card-border: rgba(160, 32, 240, 0.15);
            --card-hover-border: rgba(160, 32, 240, 0.5);
            --radius-card: 20px;
            --radius-btn: 12px;
            --radius-badge: 30px;
            --radius-panel: 24px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
            --shadow-card-hover: 0 8px 30px rgba(160, 32, 240, 0.3);
            --shadow-glow-cyan: 0 0 15px rgba(0, 240, 255, 0.6);
            --shadow-glow-purple: 0 0 20px rgba(160, 32, 240, 0.5);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background-color: var(--deep-space);
            color: var(--body-text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

        button,
        input {
            font-family: inherit;
            outline: none;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        /* 导航 */
        #site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 24px;
            transition: all var(--transition-smooth);
            background: rgba(10, 14, 26, 0.75);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid transparent;
        }

        #site-header.scrolled {
            background: rgba(10, 14, 26, 0.92);
            border-bottom: 1px solid rgba(160, 32, 240, 0.2);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
        }

        #site-header .header-inner {
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            position: relative;
            flex-shrink: 0;
        }

        .logo-icon svg {
            width: 100%;
            height: 100%;
        }

        .logo-text {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            background: linear-gradient(135deg, var(--neon-purple), var(--cyber-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: #c5cde0;
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-smooth);
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            border-radius: 1px;
            background: linear-gradient(135deg, var(--neon-purple), var(--cyber-cyan));
            transition: width var(--transition-smooth);
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: #fff;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            color: #fff;
            background: linear-gradient(135deg, var(--neon-purple), var(--cyber-cyan));
            transition: all var(--transition-smooth);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-cta:hover {
            box-shadow: var(--shadow-glow-cyan);
            filter: brightness(1.15);
            color: #fff;
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
            background: none;
            border: none;
        }

        .mobile-menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            border-radius: 2px;
            background: var(--gold-star);
            transition: all var(--transition-smooth);
        }

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-toggle.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        /* 移动端菜单面板 */
        .mobile-panel {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 14, 26, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            transform: translateY(-100%);
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            pointer-events: none;
        }

        .mobile-panel.open {
            transform: translateY(0);
            pointer-events: auto;
        }

        .mobile-panel a {
            font-size: 22px;
            font-weight: 600;
            color: var(--gold-star);
            transition: color var(--transition-smooth);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .mobile-panel a:hover {
            color: var(--cyber-cyan);
        }

        .mobile-panel .mobile-cta {
            margin-top: 8px;
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--neon-purple), var(--cyber-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 17px;
        }

        /* Hero */
        #hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 100px 24px 60px;
            overflow: hidden;
            background: linear-gradient(135deg, #0d0520 0%, #0a0e1a 30%, #061018 60%, #0a0e1a 100%);
        }

        #hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -180px;
            width: 700px;
            height: 700px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(160, 32, 240, 0.25) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
            animation: heroGlow1 8s ease-in-out infinite;
        }

        #hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -150px;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.18) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
            animation: heroGlow2 10s ease-in-out infinite;
        }

        @keyframes heroGlow1 {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            33% {
                transform: translate(40px, -30px) scale(1.1);
            }
            66% {
                transform: translate(-20px, 20px) scale(0.95);
            }
        }

        @keyframes heroGlow2 {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            50% {
                transform: translate(-30px, -40px) scale(1.15);
            }
        }

        /* 粒子 */
        .particles-container {
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 0;
        }

        .particle {
            position: absolute;
            width: 2px;
            height: 2px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.6);
            animation: floatUp linear infinite;
        }

        @keyframes floatUp {
            0% {
                transform: translateY(0) translateX(0) scale(1);
                opacity: 0;
            }
            10% {
                opacity: 1;
            }
            90% {
                opacity: 1;
            }
            100% {
                transform: translateY(-100vh) translateX(40px) scale(0.3);
                opacity: 0;
            }
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            max-width: 1280px;
            margin: 0 auto;
            width: 100%;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .hero-text h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin: 0 0 18px 0;
            background: linear-gradient(135deg, #c070ff 0%, var(--cyber-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-text .hero-subtitle {
            font-size: 18px;
            color: rgba(240, 230, 210, 0.8);
            margin: 0 0 32px 0;
            line-height: 1.6;
            max-width: 480px;
        }

        .hero-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 16px;
            color: #fff;
            background: linear-gradient(135deg, var(--neon-purple), var(--cyber-cyan));
            transition: all var(--transition-smooth);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-cyan);
            filter: brightness(1.15);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            color: var(--gold-star);
            background: transparent;
            border: 1.5px solid rgba(240, 230, 210, 0.35);
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .btn-secondary:hover {
            border-color: var(--cyber-cyan);
            color: var(--cyber-cyan);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
        }

        /* Hero数据卡片 */
        .hero-data-card {
            background: rgba(17, 24, 39, 0.85);
            border: 1px solid rgba(160, 32, 240, 0.2);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            box-shadow: var(--shadow-card);
            position: relative;
            animation: floatCard 6s ease-in-out infinite;
        }

        @keyframes floatCard {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-12px);
            }
        }

        .hero-data-card .data-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid rgba(160, 32, 240, 0.1);
        }
        .hero-data-card .data-row:last-child {
            border-bottom: none;
        }

        .hero-data-card .data-label {
            font-size: 13px;
            color: #8890a5;
        }

        .hero-data-card .data-value {
            font-family: 'DIN Alternate', 'Rajdhani', monospace;
            font-size: 28px;
            font-weight: 900;
            color: var(--data-amber);
            font-feature-settings: 'tnum';
            letter-spacing: 0.5px;
        }

        .hero-data-card .data-badge-live {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 700;
            color: #00ff88;
            background: rgba(0, 255, 136, 0.1);
            padding: 4px 10px;
            border-radius: var(--radius-badge);
            margin-bottom: 14px;
        }

        .hero-data-card .data-badge-live .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #00ff88;
            animation: pulseDot 1.5s ease-in-out infinite;
        }

        @keyframes pulseDot {
            0%,
            100% {
                box-shadow: 0 0 4px #00ff88;
            }
            50% {
                box-shadow: 0 0 14px #00ff88, 0 0 24px rgba(0, 255, 136, 0.5);
            }
        }

        .scroll-indicator {
            position: absolute;
            bottom: 28px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            animation: bounceDown 2s ease-in-out infinite;
            cursor: pointer;
            color: rgba(240, 230, 210, 0.6);
            font-size: 24px;
        }

        @keyframes bounceDown {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(10px);
            }
        }

        /* 通用板块 */
        .section {
            padding: 80px 24px;
            position: relative;
        }

        .section-container {
            max-width: 1280px;
            margin: 0 auto;
        }

        .section-h2 {
            font-size: 36px;
            font-weight: 700;
            color: var(--gold-star);
            margin: 0 0 12px 0;
            padding-left: 18px;
            position: relative;
            line-height: 1.3;
        }

        .section-h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 2px;
            background: linear-gradient(180deg, var(--neon-purple), var(--cyber-cyan));
        }

        .section-subtitle {
            font-size: 17px;
            color: #8890a5;
            margin: 0 0 40px 0;
            padding-left: 18px;
            max-width: 600px;
            line-height: 1.6;
        }

        /* KPI看板 */
        #kpi {
            background: var(--deep-space);
            position: relative;
        }
        #kpi::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(160, 32, 240, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
            z-index: 1;
        }

        .kpi-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 26px 22px;
            text-align: center;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }

        .kpi-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--card-hover-border);
        }

        .kpi-card .kpi-icon {
            font-size: 32px;
            margin-bottom: 10px;
            display: inline-block;
        }

        .kpi-card .kpi-number {
            font-family: 'DIN Alternate', 'Rajdhani', monospace;
            font-size: 48px;
            font-weight: 900;
            color: var(--data-amber);
            font-feature-settings: 'tnum';
            line-height: 1.1;
            margin: 6px 0;
            letter-spacing: 0.5px;
        }

        .kpi-card .kpi-label {
            font-size: 14px;
            color: #8890a5;
            margin: 0;
        }

        .kpi-card .kpi-bar {
            margin-top: 12px;
            height: 3px;
            border-radius: 2px;
            background: rgba(255, 255, 255, 0.08);
            overflow: hidden;
        }
        .kpi-card .kpi-bar-fill {
            height: 100%;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--neon-purple), var(--cyber-cyan));
            transition: width 1.2s ease-out;
        }

        /* 服务矩阵 */
        #services {
            background: #0c1020;
            position: relative;
        }
        #services::after {
            content: '';
            position: absolute;
            bottom: 0;
            right: 0;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .services-grid {
            display: grid;
            grid-template-columns: 5fr 3fr 4fr;
            gap: 20px;
            position: relative;
            z-index: 1;
        }
        .services-grid.row2 {
            grid-template-columns: 4fr 5fr 3fr;
            margin-top: 20px;
        }

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .service-card:hover {
            transform: scale(1.02);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--card-hover-border);
        }

        .service-card .svc-icon {
            font-size: 38px;
            display: inline-block;
            width: fit-content;
        }
        .service-card h3 {
            font-size: 24px;
            font-weight: 600;
            color: var(--gold-star);
            margin: 0;
            line-height: 1.3;
        }
        .service-card p {
            font-size: 15px;
            color: var(--body-text);
            margin: 0;
            line-height: 1.65;
            flex-grow: 1;
        }
        .service-card .svc-badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13px;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            width: fit-content;
        }
        .badge-amber {
            background: rgba(255, 159, 10, 0.15);
            color: var(--data-amber);
        }
        .badge-purple {
            background: rgba(160, 32, 240, 0.15);
            color: #c070ff;
        }
        .badge-cyan {
            background: rgba(0, 240, 255, 0.12);
            color: var(--cyber-cyan);
        }

        .service-card.tall {
            min-height: 380px;
        }

        .service-card .svc-img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: 4px;
        }

        /* 结果对比 */
        #compare {
            background: var(--deep-space);
            position: relative;
        }

        .compare-grid {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 28px;
            align-items: stretch;
            position: relative;
            z-index: 1;
        }

        .compare-panel {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-panel);
            padding: 32px 26px;
            box-shadow: var(--shadow-card);
        }
        .compare-panel.before-panel {
            border-left: 3px solid #555;
        }
        .compare-panel.after-panel {
            border: 2px solid transparent;
            background-clip: padding-box;
            position: relative;
        }
        .compare-panel.after-panel::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: var(--radius-panel);
            background: linear-gradient(135deg, var(--neon-purple), var(--cyber-cyan));
            z-index: -1;
            border-radius: calc(var(--radius-panel) + 2px);
        }
        .compare-panel h3 {
            font-size: 22px;
            font-weight: 700;
            margin: 0 0 18px 0;
        }
        .compare-panel.before-panel h3 {
            color: #8890a5;
        }
        .compare-panel.after-panel h3 {
            color: var(--cyber-cyan);
        }
        .compare-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 15px;
        }
        .compare-row .cmp-val {
            font-family: 'DIN Alternate', 'Rajdhani', monospace;
            font-size: 22px;
            font-weight: 900;
            font-feature-settings: 'tnum';
        }
        .compare-row .cmp-val.bad {
            color: #e05555;
        }
        .compare-row .cmp-val.good {
            color: var(--data-amber);
        }
        .compare-vs {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 900;
            color: rgba(240, 230, 210, 0.4);
            letter-spacing: 2px;
            padding: 0 8px;
            align-self: center;
        }

        /* FAQ */
        #faq {
            background: #0c1020;
            position: relative;
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px 28px;
            position: relative;
            z-index: 1;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }
        .faq-item:hover {
            border-color: rgba(160, 32, 240, 0.3);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            cursor: pointer;
            user-select: none;
            gap: 12px;
            transition: background var(--transition-smooth);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-q-label {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(160, 32, 240, 0.2);
            color: #c070ff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
        }
        .faq-q-text {
            flex: 1;
            font-weight: 600;
            font-size: 15px;
            color: #d5dbe8;
            line-height: 1.4;
        }
        .faq-arrow {
            flex-shrink: 0;
            color: #8890a5;
            transition: transform var(--transition-smooth);
            font-size: 14px;
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: var(--cyber-cyan);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
        }
        .faq-answer-inner {
            padding: 0 20px 18px 60px;
            font-size: 14px;
            color: #8890a5;
            line-height: 1.7;
        }

        /* 转化表单 */
        #contact {
            background: #0a0e1a;
            position: relative;
            overflow: hidden;
        }
        #contact::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 800px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(160, 32, 240, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .contact-inner {
            position: relative;
            z-index: 1;
            max-width: 680px;
            margin: 0 auto;
            text-align: center;
            background: rgba(17, 24, 39, 0.7);
            border: 1px solid rgba(160, 32, 240, 0.2);
            border-radius: var(--radius-panel);
            padding: 48px 36px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .contact-inner h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--gold-star);
            margin: 0 0 10px 0;
        }
        .contact-inner .contact-sub {
            font-size: 16px;
            color: #8890a5;
            margin: 0 0 28px 0;
        }
        .contact-form-row {
            display: flex;
            gap: 12px;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
        }
        .contact-input {
            flex: 1;
            min-width: 240px;
            height: 48px;
            border-radius: 8px;
            border: 1.5px solid rgba(240, 230, 210, 0.25);
            background: rgba(10, 14, 26, 0.6);
            color: #fff;
            padding: 0 16px;
            font-size: 15px;
            transition: all var(--transition-smooth);
        }
        .contact-input:focus {
            border-color: var(--cyber-cyan);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
            outline: none;
        }
        .contact-input::placeholder {
            color: #667080;
        }
        .contact-submit {
            height: 48px;
            padding: 0 32px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 16px;
            color: #fff;
            background: linear-gradient(135deg, var(--neon-purple), var(--cyber-cyan));
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .contact-submit:hover {
            box-shadow: var(--shadow-glow-cyan);
            filter: brightness(1.15);
        }
        .contact-lock {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: #667080;
            margin-top: 14px;
            justify-content: center;
        }

        /* 页脚 */
        #site-footer {
            background: #070a14;
            padding: 50px 24px 28px;
            border-top: 1px solid rgba(160, 32, 240, 0.15);
        }
        .footer-inner {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--gold-star);
            margin: 0 0 14px 0;
        }
        .footer-col p,
        .footer-col a {
            font-size: 13px;
            color: #667080;
            line-height: 1.8;
            display: block;
        }
        .footer-col a:hover {
            color: var(--cyber-cyan);
        }
        .footer-logo-sm {
            font-size: 18px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--neon-purple), var(--cyber-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 8px;
            display: inline-block;
        }
        .footer-socials {
            display: flex;
            gap: 14px;
            margin-top: 6px;
        }
        .footer-socials a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #8890a5;
            font-size: 16px;
            transition: all var(--transition-smooth);
        }
        .footer-socials a:hover {
            background: rgba(160, 32, 240, 0.25);
            color: var(--cyber-cyan);
        }
        .footer-bottom {
            max-width: 1280px;
            margin: 32px auto 0;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
            font-size: 12px;
            color: #556070;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 36px;
                text-align: center;
            }
            .hero-text .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
                max-width: 500px;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-data-card {
                max-width: 440px;
                margin: 0 auto;
            }
            .hero-text h1 {
                font-size: 40px;
            }
            .kpi-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .services-grid,
            .services-grid.row2 {
                grid-template-columns: 1fr 1fr;
            }
            .service-card.tall {
                min-height: auto;
            }
            .compare-grid {
                grid-template-columns: 1fr;
            }
            .compare-vs {
                padding: 8px 0;
                font-size: 18px;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .section-h2 {
                font-size: 28px;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            #site-header .header-inner {
                height: 56px;
            }
            .logo-text {
                font-size: 18px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
            }
            #hero {
                padding: 80px 16px 50px;
                min-height: auto;
            }
            .hero-text h1 {
                font-size: 32px;
            }
            .hero-text .hero-subtitle {
                font-size: 15px;
            }
            .hero-data-card .data-value {
                font-size: 22px;
            }
            .hero-data-card {
                padding: 20px 16px;
            }
            .section {
                padding: 50px 16px;
            }
            .section-h2 {
                font-size: 24px;
                padding-left: 14px;
            }
            .section-h2::before {
                width: 3px;
                top: 4px;
                bottom: 4px;
            }
            .kpi-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .kpi-card .kpi-number {
                font-size: 34px;
            }
            .services-grid,
            .services-grid.row2 {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .service-card {
                padding: 22px 18px;
            }
            .compare-panel {
                padding: 22px 16px;
            }
            .compare-row {
                font-size: 13px;
            }
            .compare-row .cmp-val {
                font-size: 18px;
            }
            .contact-inner {
                padding: 32px 20px;
            }
            .contact-inner h2 {
                font-size: 26px;
            }
            .contact-form-row {
                flex-direction: column;
                gap: 10px;
            }
            .contact-input {
                min-width: auto;
                width: 100%;
            }
            .contact-submit {
                width: 100%;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            .footer-socials {
                justify-content: center;
            }
            .faq-q-text {
                font-size: 14px;
            }
            .scroll-indicator {
                bottom: 14px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 22px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 26px;
            }
            .kpi-grid {
                grid-template-columns: 1fr;
            }
            .kpi-card .kpi-number {
                font-size: 30px;
            }
            .section-h2 {
                font-size: 22px;
            }
            .contact-inner h2 {
                font-size: 22px;
            }
        }

        /* focus可见样式 */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--cyber-cyan);
            outline-offset: 2px;
        }

        /* 选中文字 */
        ::selection {
            background: rgba(160, 32, 240, 0.35);
            color: #fff;
        }