:root {
            --blue-400: #60a5fa;
            --blue-500: #3b82f6;
            --blue-600: #2563eb;
            --slate-200: #e2e8f0;
            --slate-300: #cbd5e1;
            --slate-400: #94a3b8;
            --slate-500: #64748b;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1e293b;
            --slate-900: #0f172a;
            --emerald-400: #34d399;
            --emerald-500: #10b981;
            --emerald-600: #059669;
            --violet-400: #a78bfa;
            --violet-500: #8b5cf6;
            --violet-600: #7c3aed;
            --amber-400: #fbbf24;
            --amber-500: #f59e0b;
            --rose-400: #fb7185;
            --rose-500: #f43f5e;
            --cyan-400: #22d3ee;
            --cyan-500: #06b6d4;
            --gradient-hero: linear-gradient(160deg, #0f172a 0%, #1a2740 25%, #0d1b33 50%, #0a1628 75%, #0f172a 100%);
            --gradient-ai: linear-gradient(135deg, #7c3aed 0%, #3b82f6 50%, #06b6d4 100%);
            --gradient-edge: linear-gradient(135deg, #059669 0%, #10b981 30%, #34d399 70%, #06b6d4 100%);
            --gradient-amber: linear-gradient(135deg, #f59e0b 0%, #fbbf24 50%, #fde68a 100%);
            --gradient-rose: linear-gradient(135deg, #f43f5e 0%, #fb7185 50%, #fda4af 100%);
            --glow-blue: 0 0 40px rgba(59, 130, 246, 0.25);
            --glow-violet: 0 0 40px rgba(124, 58, 237, 0.25);
            --glow-emerald: 0 0 40px rgba(16, 185, 129, 0.2);
            --glow-amber: 0 0 40px rgba(245, 158, 11, 0.2);
            --glow-rose: 0 0 35px rgba(244, 63, 94, 0.18);
            --radius-sm: 10px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: #0f172a;
            color: #e2e8f0;
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== HEADER ========== */
        .header {
            background: rgba(15, 23, 42, 0.88);
            backdrop-filter: blur(18px) saturate(140%);
            -webkit-backdrop-filter: blur(18px) saturate(140%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            position: sticky;
            top: 0;
            z-index: 200;
            transition: var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.3px;
            background: var(--gradient-ai);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--gradient-ai);
            border-radius: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            font-weight: 900;
            -webkit-text-fill-color: #fff;
            box-shadow: var(--glow-violet);
            position: relative;
        }
        .logo-icon::after {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 14px;
            background: var(--gradient-ai);
            opacity: 0.35;
            z-index: -1;
            filter: blur(10px);
            animation: logoPulse 2.4s ease-in-out infinite;
        }
        @keyframes logoPulse {
            0%,
            100% {
                opacity: 0.3;
                transform: scale(1);
            }
            50% {
                opacity: 0.7;
                transform: scale(1.08);
            }
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav a {
            font-size: 14.5px;
            font-weight: 500;
            color: #cbd5e1;
            letter-spacing: 0.2px;
            position: relative;
            padding: 4px 0;
        }
        .nav a:hover {
            color: #ffffff;
        }
        .nav a.active {
            color: #ffffff;
            font-weight: 600;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: -3px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--gradient-ai);
            border-radius: 2px;
        }
        .nav a.nav-cta {
            background: var(--gradient-ai);
            color: #fff;
            padding: 9px 22px;
            border-radius: 22px;
            font-weight: 600;
            font-size: 13.5px;
            letter-spacing: 0.3px;
            box-shadow: var(--glow-violet);
            transition: all 0.3s;
        }
        .nav a.nav-cta:hover {
            box-shadow: 0 0 50px rgba(124, 58, 237, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            cursor: pointer;
            padding: 6px;
            z-index: 210;
        }
        .mobile-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #e2e8f0;
            border-radius: 4px;
            transition: 0.3s;
        }
        .mobile-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== PAGE HERO ========== */
        .page-hero {
            background: var(--gradient-hero);
            padding: 60px 0 68px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            text-align: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -32%;
            right: -8%;
            width: 580px;
            height: 580px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
            animation: heroGlow 9s ease-in-out infinite;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -26%;
            left: -6%;
            width: 460px;
            height: 460px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
            animation: heroGlow 11s ease-in-out infinite reverse;
        }
        @keyframes heroGlow {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            33% {
                transform: translate(32px, -24px) scale(1.1);
            }
            66% {
                transform: translate(-14px, 16px) scale(0.94);
            }
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 6px 18px;
            font-size: 12.5px;
            font-weight: 600;
            color: #6ee7b7;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-bottom: 18px;
            position: relative;
            z-index: 1;
            backdrop-filter: blur(8px);
        }
        .page-hero .hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            background: #34d399;
            border-radius: 50%;
            animation: livePulse 1.5s infinite;
            box-shadow: 0 0 12px rgba(16, 185, 129, 0.6);
        }
        @keyframes livePulse {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.35;
                transform: scale(0.7);
            }
        }
        .page-hero h1 {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.15;
            color: #ffffff;
            margin-bottom: 14px;
            letter-spacing: -0.8px;
            position: relative;
            z-index: 1;
        }
        .page-hero h1 .gradient-text {
            background: var(--gradient-ai);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero .hero-sub {
            font-size: 16px;
            color: #94a3b8;
            max-width: 620px;
            margin: 0 auto 14px;
            position: relative;
            z-index: 1;
            letter-spacing: 0.15px;
        }
        .page-hero .hero-metrics {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
            margin-top: 8px;
        }
        .page-hero .hero-metric-item {
            display: flex;
            align-items: center;
            gap: 7px;
            font-size: 13px;
            color: #94a3b8;
        }
        .page-hero .hero-metric-item .metric-num {
            font-weight: 800;
            color: #6ee7b7;
            font-size: 17px;
            letter-spacing: -0.3px;
        }

        /* ========== 智能搜索框 ========== */
        .search-section {
            padding: 0;
            margin-top: -28px;
            position: relative;
            z-index: 10;
        }
        .search-wrap {
            max-width: 640px;
            margin: 0 auto;
            background: rgba(15, 23, 42, 0.95);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 60px;
            padding: 6px 6px 6px 24px;
            display: flex;
            align-items: center;
            gap: 10px;
            backdrop-filter: blur(20px);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
            transition: all 0.35s;
        }
        .search-wrap:focus-within {
            border-color: rgba(124, 58, 237, 0.5);
            box-shadow: 0 8px 50px rgba(124, 58, 237, 0.2), var(--glow-violet);
        }
        .search-wrap .search-icon {
            font-size: 20px;
            flex-shrink: 0;
            opacity: 0.6;
        }
        .search-wrap input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: #e2e8f0;
            font-size: 15px;
            letter-spacing: 0.2px;
            font-family: inherit;
            padding: 10px 0;
        }
        .search-wrap input::placeholder {
            color: #64748b;
            letter-spacing: 0.3px;
        }
        .search-wrap .search-btn {
            background: var(--gradient-ai);
            color: #fff;
            border: none;
            padding: 11px 26px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 14px;
            cursor: pointer;
            letter-spacing: 0.3px;
            transition: all 0.3s;
            box-shadow: var(--glow-violet);
            white-space: nowrap;
            font-family: inherit;
        }
        .search-wrap .search-btn:hover {
            box-shadow: 0 0 45px rgba(124, 58, 237, 0.5);
            transform: scale(1.03);
        }
        .search-suggestions {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: center;
            margin-top: 10px;
            font-size: 12px;
            color: #64748b;
            letter-spacing: 0.2px;
        }
        .search-suggestions span {
            cursor: pointer;
            padding: 4px 14px;
            border-radius: 16px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.3s;
        }
        .search-suggestions span:hover {
            border-color: rgba(167, 139, 250, 0.4);
            color: #c4b5fd;
            background: rgba(124, 58, 237, 0.08);
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 60px 0;
            position: relative;
        }
        .section-dark {
            background: #0a0f1a;
        }
        .section-alt {
            background: #0f172a;
        }
        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 42px;
        }
        .section-header .tag {
            display: inline-block;
            font-size: 11.5px;
            font-weight: 700;
            letter-spacing: 2.5px;
            text-transform: uppercase;
            color: #6ee7b7;
            margin-bottom: 10px;
        }
        .section-header h2 {
            font-size: 30px;
            font-weight: 900;
            color: #ffffff;
            margin-bottom: 10px;
            letter-spacing: -0.5px;
        }
        .section-header h2 .gradient-text {
            background: var(--gradient-ai);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-header p {
            font-size: 14.5px;
            color: #94a3b8;
        }

        /* ========== 五大帮助渠道卡片 ========== */
        .channels-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }
        .channel-card {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            padding: 26px 18px;
            text-align: center;
            transition: all 0.35s;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        .channel-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            opacity: 0;
            transition: opacity 0.35s;
            border-radius: 3px 3px 0 0;
            background: var(--gradient-ai);
        }
        .channel-card:hover::before {
            opacity: 1;
        }
        .channel-card:hover {
            border-color: rgba(167, 139, 250, 0.3);
            transform: translateY(-6px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35), var(--glow-violet);
        }
        .channel-card .ch-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin: 0 auto 14px;
            background: rgba(124, 58, 237, 0.1);
            border: 1px solid rgba(124, 58, 237, 0.2);
            transition: all 0.35s;
        }
        .channel-card:hover .ch-icon {
            box-shadow: 0 0 30px rgba(124, 58, 237, 0.35);
            border-color: rgba(167, 139, 250, 0.5);
        }
        .channel-card .ch-name {
            font-size: 15px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 4px;
            letter-spacing: -0.2px;
        }
        .channel-card .ch-desc {
            font-size: 11.5px;
            color: #64748b;
            line-height: 1.4;
        }
        .channel-card .ch-badge {
            display: inline-block;
            margin-top: 8px;
            font-size: 10px;
            padding: 3px 10px;
            border-radius: 10px;
            font-weight: 700;
            letter-spacing: 0.4px;
            background: rgba(16, 185, 129, 0.12);
            color: #34d399;
        }

        /* ========== 问题分类折叠面板 ========== */
        .faq-categories {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-cat {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.3s;
        }
        .faq-cat:hover {
            border-color: rgba(167, 139, 250, 0.2);
        }
        .faq-cat.open {
            border-color: rgba(124, 58, 237, 0.35);
            box-shadow: var(--glow-violet);
        }
        .faq-cat-header {
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            user-select: none;
            transition: background 0.3s;
            gap: 12px;
        }
        .faq-cat-header:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-cat-header .cat-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
            background: rgba(124, 58, 237, 0.1);
        }
        .faq-cat-header .cat-info {
            flex: 1;
        }
        .faq-cat-header .cat-name {
            font-size: 16px;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: -0.2px;
        }
        .faq-cat-header .cat-count {
            font-size: 11px;
            color: #64748b;
        }
        .faq-cat-header .cat-arrow {
            font-size: 14px;
            color: #64748b;
            transition: transform 0.35s;
            flex-shrink: 0;
        }
        .faq-cat.open .faq-cat-header .cat-arrow {
            transform: rotate(180deg);
            color: #a78bfa;
        }
        .faq-cat-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-cat.open .faq-cat-body {
            max-height: 600px;
        }
        .faq-cat-body-inner {
            padding: 0 22px 18px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .faq-cat-body .faq-item {
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.04);
            cursor: pointer;
            transition: all 0.3s;
            font-size: 13.5px;
            color: #cbd5e1;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-cat-body .faq-item:hover {
            border-color: rgba(167, 139, 250, 0.3);
            background: rgba(124, 58, 237, 0.05);
            color: #ffffff;
        }
        .faq-cat-body .faq-item .faq-dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: #a78bfa;
            flex-shrink: 0;
        }

        /* ========== 智能客服模拟器 ========== */
        .chat-simulator {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-xl);
            max-width: 650px;
            margin: 0 auto;
            overflow: hidden;
            position: relative;
        }
        .chat-sim-header {
            background: rgba(124, 58, 237, 0.08);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .chat-sim-header .chat-avatar {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--gradient-ai);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
            box-shadow: var(--glow-violet);
            animation: logoPulse 2.4s ease-in-out infinite;
        }
        .chat-sim-header .chat-agent-name {
            font-weight: 700;
            color: #fff;
            font-size: 14px;
            letter-spacing: -0.2px;
        }
        .chat-sim-header .chat-agent-status {
            font-size: 10.5px;
            color: #34d399;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .chat-sim-header .chat-agent-status .status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #34d399;
            animation: livePulse 1.5s infinite;
        }
        .chat-sim-body {
            padding: 18px 16px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            max-height: 280px;
            overflow-y: auto;
            min-height: 180px;
            background: rgba(0, 0, 0, 0.15);
        }
        .chat-msg {
            display: flex;
            gap: 8px;
            animation: fadeInUp 0.3s ease;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .chat-msg.agent {
            align-items: flex-start;
        }
        .chat-msg.user {
            flex-direction: row-reverse;
        }
        .chat-msg .msg-bubble {
            padding: 10px 15px;
            border-radius: 16px;
            font-size: 13px;
            line-height: 1.5;
            max-width: 80%;
            letter-spacing: 0.15px;
        }
        .chat-msg.agent .msg-bubble {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: #e2e8f0;
            border-bottom-left-radius: 4px;
        }
        .chat-msg.user .msg-bubble {
            background: var(--gradient-ai);
            color: #fff;
            border-bottom-right-radius: 4px;
            box-shadow: var(--glow-violet);
        }
        .chat-sim-footer {
            padding: 12px 16px;
            display: flex;
            gap: 8px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            background: rgba(0, 0, 0, 0.1);
        }
        .chat-sim-footer input {
            flex: 1;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 24px;
            padding: 10px 16px;
            color: #e2e8f0;
            font-family: inherit;
            font-size: 13px;
            outline: none;
            transition: all 0.3s;
        }
        .chat-sim-footer input:focus {
            border-color: rgba(124, 58, 237, 0.5);
            box-shadow: 0 0 20px rgba(124, 58, 237, 0.15);
        }
        .chat-sim-footer input::placeholder {
            color: #475569;
        }
        .chat-sim-footer .send-btn {
            background: var(--gradient-ai);
            border: none;
            color: #fff;
            padding: 10px 18px;
            border-radius: 24px;
            font-weight: 700;
            cursor: pointer;
            font-size: 13px;
            letter-spacing: 0.2px;
            transition: all 0.3s;
            box-shadow: var(--glow-violet);
            font-family: inherit;
            white-space: nowrap;
        }
        .chat-sim-footer .send-btn:hover {
            box-shadow: 0 0 40px rgba(124, 58, 237, 0.5);
        }
        .chat-quick-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            padding: 8px 16px;
            background: rgba(0, 0, 0, 0.05);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .chat-quick-actions .quick-chip {
            font-size: 11px;
            padding: 5px 12px;
            border-radius: 16px;
            cursor: pointer;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: #94a3b8;
            transition: all 0.3s;
            letter-spacing: 0.2px;
            font-family: inherit;
        }
        .chat-quick-actions .quick-chip:hover {
            border-color: rgba(167, 139, 250, 0.4);
            color: #c4b5fd;
            background: rgba(124, 58, 237, 0.08);
        }

        /* ========== 问题解决指标 ========== */
        .metrics-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .metric-card {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-lg);
            padding: 22px 16px;
            text-align: center;
            transition: all 0.35s;
        }
        .metric-card:hover {
            border-color: rgba(16, 185, 129, 0.3);
            box-shadow: var(--glow-emerald);
            transform: translateY(-3px);
        }
        .metric-card .m-icon {
            font-size: 28px;
            margin-bottom: 8px;
        }
        .metric-card .m-num {
            font-size: 34px;
            font-weight: 900;
            letter-spacing: -1px;
            background: var(--gradient-edge);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .metric-card .m-label {
            font-size: 11.5px;
            color: #64748b;
            letter-spacing: 0.3px;
            margin-top: 2px;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: #0a0f1a;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .cta-box {
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius-xl);
            padding: 42px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
            border: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
            overflow: hidden;
        }
        .cta-box::after {
            content: '';
            position: absolute;
            top: -45%;
            right: -14%;
            width: 340px;
            height: 340px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.07) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-box .cta-text h2 {
            font-size: 24px;
            font-weight: 900;
            color: #ffffff;
            margin-bottom: 4px;
            letter-spacing: -0.4px;
            position: relative;
            z-index: 1;
        }
        .cta-box .cta-text p {
            font-size: 14px;
            color: #94a3b8;
            position: relative;
            z-index: 1;
        }
        .cta-box .cta-btn {
            position: relative;
            z-index: 1;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            background: var(--gradient-ai);
            color: #fff;
            padding: 13px 30px;
            border-radius: 28px;
            font-size: 15px;
            font-weight: 700;
            letter-spacing: 0.3px;
            transition: all 0.3s;
            box-shadow: var(--glow-violet);
            position: relative;
            overflow: hidden;
            border: none;
            cursor: pointer;
            font-family: inherit;
        }
        .btn-primary::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 60%);
            pointer-events: none;
        }
        .btn-primary:hover {
            box-shadow: 0 0 55px rgba(124, 58, 237, 0.5);
            transform: translateY(-3px);
            color: #fff;
        }

        /* ========== 提交工单卡片 ========== */
        .ticket-card {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-xl);
            padding: 36px 32px;
            text-align: center;
            max-width: 600px;
            margin: 0 auto;
            transition: all 0.35s;
            position: relative;
            overflow: hidden;
        }
        .ticket-card::before {
            content: '';
            position: absolute;
            top: -30%;
            left: 50%;
            transform: translateX(-50%);
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.06) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }
        .ticket-card:hover {
            border-color: rgba(245, 158, 11, 0.35);
            box-shadow: var(--glow-amber);
            transform: translateY(-4px);
        }
        .ticket-card .ticket-icon {
            font-size: 44px;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .ticket-card h3 {
            font-size: 20px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 6px;
            letter-spacing: -0.3px;
            position: relative;
            z-index: 1;
        }
        .ticket-card .ticket-desc {
            font-size: 13px;
            color: #94a3b8;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .ticket-card .ticket-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 26px;
            border-radius: 24px;
            font-weight: 700;
            font-size: 14px;
            letter-spacing: 0.3px;
            background: var(--gradient-amber);
            color: #0f172a;
            border: none;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: var(--glow-amber);
            position: relative;
            z-index: 1;
            font-family: inherit;
        }
        .ticket-card .ticket-btn:hover {
            box-shadow: 0 0 45px rgba(245, 158, 11, 0.5);
            transform: translateY(-2px);
        }
        .ticket-card .ticket-response {
            margin-top: 8px;
            font-size: 11px;
            color: #64748b;
            position: relative;
            z-index: 1;
            letter-spacing: 0.2px;
        }

        /* ========== FOOTER ========== */
        .footer {
            background: #070b14;
            color: #94a3b8;
            padding: 52px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
            font-size: 20px;
        }
        .footer-brand .logo .logo-icon {
            background: var(--gradient-ai);
            -webkit-text-fill-color: #fff;
        }
        .footer-brand p {
            font-size: 13.5px;
            max-width: 280px;
            color: #64748b;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 13.5px;
            color: #64748b;
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: #cbd5e1;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12.5px;
            color: #475569;
        }
        .footer-bottom .links {
            display: flex;
            gap: 18px;
        }
        .footer-bottom .links a {
            color: #475569;
            transition: var(--transition);
            font-size: 12.5px;
        }
        .footer-bottom .links a:hover {
            color: #94a3b8;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .channels-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 14px;
            }
            .channels-grid .channel-card:last-child {
                grid-column: span 3;
                max-width: 280px;
                justify-self: center;
            }
            .metrics-row {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-hero h1 {
                font-size: 32px;
            }
        }
        @media (max-width: 768px) {
            .nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(15, 23, 42, 0.96);
                backdrop-filter: blur(20px);
                padding: 20px 24px;
                gap: 14px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
                z-index: 190;
            }
            .nav.open {
                display: flex;
            }
            .nav a.nav-cta {
                width: 100%;
                text-align: center;
            }
            .mobile-toggle {
                display: flex;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero {
                padding: 40px 0 48px;
            }
            .section {
                padding: 42px 0;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .channels-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .channels-grid .channel-card:last-child {
                grid-column: span 2;
                max-width: 100%;
            }
            .metrics-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .chat-simulator {
                max-width: 100%;
            }
            .chat-sim-body {
                max-height: 220px;
                min-height: 140px;
            }
            .faq-cat-header {
                padding: 14px 16px;
            }
            .faq-cat-body-inner {
                padding: 0 14px 14px;
            }
            .faq-cat-header .cat-name {
                font-size: 14px;
            }
            .cta-box {
                padding: 24px 16px;
                flex-direction: column;
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .search-wrap {
                padding: 4px 4px 4px 16px;
            }
            .search-wrap input {
                font-size: 13px;
            }
            .search-wrap .search-btn {
                padding: 9px 18px;
                font-size: 12px;
            }
            .page-hero .hero-metrics {
                gap: 16px;
            }
            .ticket-card {
                padding: 24px 16px;
            }
        }
        @media (max-width: 480px) {
            .page-hero h1 {
                font-size: 22px;
            }
            .page-hero .hero-sub {
                font-size: 13px;
            }
            .section-header h2 {
                font-size: 20px;
            }
            .channels-grid {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .channels-grid .channel-card:last-child {
                grid-column: span 1;
            }
            .metrics-row {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .metric-card .m-num {
                font-size: 26px;
            }
            .btn-primary {
                padding: 11px 20px;
                font-size: 13.5px;
            }
            .channel-card {
                padding: 18px 12px;
            }
            .channel-card .ch-icon {
                width: 44px;
                height: 44px;
                font-size: 22px;
            }
            .channel-card .ch-name {
                font-size: 13px;
            }
            .page-hero .hero-metrics {
                gap: 10px;
                flex-direction: column;
            }
            .search-suggestions span {
                font-size: 10px;
                padding: 3px 10px;
            }
            .chat-sim-body {
                max-height: 180px;
                min-height: 120px;
            }
            .chat-msg .msg-bubble {
                font-size: 11px;
                padding: 8px 12px;
            }
            .chat-sim-footer input {
                font-size: 11px;
                padding: 8px 12px;
            }
            .chat-sim-footer .send-btn {
                font-size: 11px;
                padding: 8px 14px;
            }
            .chat-quick-actions .quick-chip {
                font-size: 10px;
                padding: 4px 10px;
            }
        }