/* roulang page: index */
:root {
            --primary: #FF4E00;
            --primary-dark: #D94100;
            --primary-light: #FF6B2B;
            --black-asphalt: #111827;
            --slate-deep: #1C2833;
            --green-accent: #00E676;
            --neutral-bg: #F2F4F6;
            --card-white: #FFFFFF;
            --text-body: #374151;
            --text-muted: #6B7280;
            --text-light: #D1D5DB;
            --border-light: #E5E7EB;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.14);
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-stack: 'Inter', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1280px;
            --section-pad: 100px;
            --section-pad-mobile: 60px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-stack);
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--neutral-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

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

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

        ul {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== 导航栏 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 16px 0;
            transition: all var(--transition-slow);
            background: transparent;
        }

        .site-header.scrolled {
            background: rgba(17, 24, 39, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 10px 0;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 22px;
            color: #FFFFFF;
            transition: color var(--transition-slow);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .site-header.scrolled .header-logo {
            color: var(--primary);
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            border-radius: 8px;
            position: relative;
            flex-shrink: 0;
            clip-path: polygon(25% 0%, 100% 0%, 75% 100%, 0% 100%);
        }

        .logo-icon::after {
            content: '';
            position: absolute;
            width: 16px;
            height: 3px;
            background: #fff;
            border-radius: 2px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) rotate(-15deg);
            box-shadow: 0 0 8px rgba(255, 255, 255, 0.7);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .header-nav a {
            color: #FFFFFF;
            font-weight: 500;
            font-size: 15px;
            position: relative;
            padding: 4px 0;
            transition: color var(--transition-fast);
            letter-spacing: 0.2px;
        }

        .header-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--green-accent);
            border-radius: 1px;
            transition: width var(--transition-base);
        }

        .header-nav a:hover {
            color: var(--green-accent);
        }

        .header-nav a:hover::after {
            width: 100%;
        }

        .site-header.scrolled .header-nav a {
            color: #D1D5DB;
        }

        .site-header.scrolled .header-nav a:hover {
            color: var(--green-accent);
        }

        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            color: #FFFFFF;
            font-size: 26px;
            cursor: pointer;
            padding: 6px;
            transition: color var(--transition-fast);
            z-index: 1001;
        }

        .hamburger-btn:hover {
            color: var(--primary);
        }

        .site-header.scrolled .hamburger-btn {
            color: #D1D5DB;
        }

        /* 移动端菜单 */
        .mobile-menu-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.92);
            z-index: 999;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 40px 32px;
            transform: translateX(100%);
            transition: transform var(--transition-slow);
            visibility: hidden;
        }

        .mobile-menu-overlay.active {
            transform: translateX(0);
            visibility: visible;
        }

        .mobile-menu-close {
            position: absolute;
            top: 24px;
            right: 28px;
            background: none;
            border: none;
            color: #fff;
            font-size: 30px;
            cursor: pointer;
            z-index: 1002;
            transition: color var(--transition-fast);
        }

        .mobile-menu-close:hover {
            color: var(--primary);
        }

        .mobile-menu-overlay nav {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .mobile-menu-overlay nav a {
            font-size: 20px;
            font-weight: 500;
            color: #E5E7EB;
            padding: 10px 0 10px 18px;
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            letter-spacing: 0.3px;
        }

        .mobile-menu-overlay nav a:hover,
        .mobile-menu-overlay nav a:focus {
            color: #FFFFFF;
            border-left-color: var(--primary);
            padding-left: 26px;
        }

        /* ========== Hero 首屏 ========== */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: var(--black-asphalt);
            isolation: isolate;
        }

        .hero-bg-image {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.45;
            filter: brightness(0.7) saturate(0.6);
        }

        .hero-grid-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background-image:
                linear-gradient(rgba(255, 78, 0, 0.06) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 78, 0, 0.06) 1px, transparent 1px);
            background-size: 50px 50px;
            animation: gridPulse 4s ease-in-out infinite;
        }

        @keyframes gridPulse {
            0%,
            100% {
                opacity: 0.5;
            }
            50% {
                opacity: 0.85;
            }
        }

        .hero-code-glow {
            position: absolute;
            z-index: 1;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 230, 118, 0.08) 0%, transparent 70%);
            pointer-events: none;
            animation: glowFloat 8s ease-in-out infinite;
        }

        .hero-code-glow.glow-1 {
            top: 15%;
            left: 10%;
            animation-delay: 0s;
        }
        .hero-code-glow.glow-2 {
            bottom: 20%;
            right: 5%;
            animation-delay: 4s;
            width: 400px;
            height: 400px;
        }

        @keyframes glowFloat {
            0%,
            100% {
                transform: translate(0, 0);
                opacity: 0.6;
            }
            33% {
                transform: translate(30px, -25px);
                opacity: 1;
            }
            66% {
                transform: translate(-20px, 15px);
                opacity: 0.5;
            }
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            padding: 120px 0 80px;
        }

        .hero-decor-line {
            width: 4px;
            height: 70px;
            background: var(--primary);
            border-radius: 2px;
            margin-bottom: 28px;
            animation: lineGrow 0.8s ease-out forwards;
        }

        @keyframes lineGrow {
            from {
                height: 0;
                opacity: 0;
            }
            to {
                height: 70px;
                opacity: 1;
            }
        }

        .hero-title {
            font-size: clamp(36px, 5.5vw, 60px);
            font-weight: 800;
            line-height: 1.1;
            color: #FFFFFF;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            animation: fadeInUp 0.9s ease-out forwards;
        }

        .hero-title .highlight {
            color: var(--primary);
            position: relative;
        }

        @keyframes fadeInUp {
            from {
                transform: translateY(40px);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }

        .hero-subtitle {
            font-size: clamp(16px, 2vw, 20px);
            font-weight: 300;
            color: var(--text-light);
            margin-bottom: 36px;
            line-height: 1.6;
            animation: fadeInUp 0.9s ease-out 0.15s forwards;
            animation-fill-mode: both;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            animation: fadeInUp 0.9s ease-out 0.3s forwards;
            animation-fill-mode: both;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            letter-spacing: 0.3px;
            white-space: nowrap;
            cursor: pointer;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(255, 78, 0, 0.35);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: scale(1.03);
            box-shadow: 0 8px 28px rgba(255, 78, 0, 0.5);
        }

        .btn-outline {
            background: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.55);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #FFFFFF;
            transform: scale(1.03);
        }

        .hero-floating-data {
            position: absolute;
            z-index: 2;
            bottom: 100px;
            right: 40px;
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            animation: fadeInUp 1s ease-out 0.5s forwards;
            animation-fill-mode: both;
        }

        .floating-data-item {
            background: rgba(28, 40, 51, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: var(--radius-md);
            padding: 16px 22px;
            text-align: center;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }

        .floating-data-value {
            font-size: 36px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            letter-spacing: -1px;
        }

        .floating-data-unit {
            font-size: 14px;
            color: #9CA3AF;
            margin-top: 4px;
            letter-spacing: 0.3px;
        }

        /* ========== 指标看板 ========== */
        .stats-panel {
            position: relative;
            z-index: 10;
            margin-top: -60px;
            padding-bottom: var(--section-pad);
        }

        .stats-card {
            background: var(--card-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 0;
            overflow: hidden;
        }

        .stat-item {
            padding: 36px 28px;
            text-align: center;
            position: relative;
            transition: background var(--transition-fast);
        }

        .stat-item:hover {
            background: #FAFBFC;
        }

        .stat-item+.stat-item {
            border-left: 1px solid var(--border-light);
        }

        .stat-number {
            font-size: 44px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            letter-spacing: -1px;
            margin-bottom: 8px;
        }

        .stat-number .unit {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-muted);
            margin-left: 2px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
            letter-spacing: 0.3px;
        }

        .stat-icon-indicator {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--green-accent);
            margin-right: 6px;
            animation: pulseDot 1.8s ease-in-out infinite;
        }

        @keyframes pulseDot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.5);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(0, 230, 118, 0);
            }
        }

        /* ========== 服务矩阵 ========== */
        .features-section {
            background: var(--neutral-bg);
            padding: var(--section-pad) 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--black-asphalt);
            line-height: 1.2;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }

        .section-header .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            font-weight: 400;
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .features-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .features-row-top {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 20px;
        }

        .features-row-bottom {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--card-white);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
        }

        .feature-card.feature-large {
            padding: 40px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .feature-card .card-accent-line {
            position: absolute;
            left: 0;
            top: 20%;
            width: 4px;
            height: 40px;
            border-radius: 0 3px 3px 0;
            background: var(--primary);
        }

        .feature-card .card-accent-line.green {
            background: var(--green-accent);
        }

        .feature-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 4px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            background: rgba(255, 78, 0, 0.1);
            color: var(--primary);
            margin-bottom: 8px;
            width: fit-content;
        }

        .feature-card .card-tag.green {
            background: rgba(0, 230, 118, 0.1);
            color: #00C853;
        }

        .feature-card h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--black-asphalt);
            line-height: 1.3;
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }

        .feature-card:hover h3 {
            color: var(--primary);
        }

        .feature-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .feature-card .card-image-wrap {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-top: auto;
            flex-shrink: 0;
        }

        .feature-card .card-image-wrap img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--radius-md);
            transition: transform var(--transition-slow);
        }

        .feature-card:hover .card-image-wrap img {
            transform: scale(1.04);
        }

        .feature-stack {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .feature-card.feature-compact {
            padding: 24px 28px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .feature-card.feature-compact .compact-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            background: rgba(255, 78, 0, 0.08);
            color: var(--primary);
        }

        .feature-card.feature-compact h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--black-asphalt);
            margin-bottom: 4px;
        }

        .feature-card.feature-compact p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== 数据流程 ========== */
        .process-section {
            background: var(--card-white);
            padding: var(--section-pad) 0;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .process-step {
            text-align: center;
            position: relative;
            padding: 32px 20px;
            border-radius: var(--radius-lg);
            background: #FAFBFC;
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
        }

        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .process-step .step-number {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            letter-spacing: -0.5px;
        }

        .process-step h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--black-asphalt);
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.55;
        }

        /* ========== 结果对比 ========== */
        .compare-section {
            background: var(--slate-deep);
            padding: var(--section-pad) 0;
            position: relative;
            overflow: hidden;
        }

        .compare-section .section-header h2 {
            color: #FFFFFF;
        }
        .compare-section .section-header .section-subtitle {
            color: #9CA3AF;
        }

        .compare-wrapper {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 0;
            align-items: center;
            position: relative;
        }

        .compare-panel {
            padding: 40px 32px;
            border-radius: var(--radius-lg);
            position: relative;
        }

        .compare-panel.panel-weak {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .compare-panel.panel-strong {
            background: rgba(255, 78, 0, 0.06);
            border: 2px solid var(--primary);
            box-shadow: 0 0 30px rgba(255, 78, 0, 0.15);
        }

        .compare-panel h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 0.2px;
        }

        .compare-panel.panel-weak h4 {
            color: #9CA3AF;
        }
        .compare-panel.panel-strong h4 {
            color: var(--primary);
        }

        .compare-metric {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 14px;
            color: #D1D5DB;
        }

        .compare-metric .metric-val {
            font-weight: 700;
            font-size: 16px;
        }

        .compare-panel.panel-strong .compare-metric .metric-val {
            color: var(--green-accent);
        }
        .compare-panel.panel-weak .compare-metric .metric-val {
            color: #EF4444;
        }

        .compare-divider {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            padding: 0 24px;
            z-index: 2;
        }

        .vs-badge {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 900;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: 1px;
            box-shadow: 0 0 24px rgba(255, 78, 0, 0.5);
            animation: vsPulse 2.5s ease-in-out infinite;
        }

        @keyframes vsPulse {
            0%,
            100% {
                box-shadow: 0 0 24px rgba(255, 78, 0, 0.5);
            }
            50% {
                box-shadow: 0 0 44px rgba(255, 78, 0, 0.8);
            }
        }

        .compare-divider .dash-line {
            width: 1px;
            flex: 1;
            min-height: 60px;
            background: repeating-linear-gradient(to bottom,
                    rgba(255, 255, 255, 0.3) 0px,
                    rgba(255, 255, 255, 0.3) 4px,
                    transparent 4px,
                    transparent 10px);
        }

        /* ========== 社区板块 ========== */
        .community-section {
            background: var(--card-white);
            padding: var(--section-pad) 0;
        }

        .community-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .community-card {
            background: var(--neutral-bg);
            border-radius: var(--radius-lg);
            padding: 36px;
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .community-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .community-card .live-dot {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--green-accent);
            margin-bottom: 12px;
        }

        .community-card .live-dot::before {
            content: '';
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--green-accent);
            animation: pulseDot 1.5s ease-in-out infinite;
        }

        .community-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--black-asphalt);
            margin-bottom: 8px;
        }

        .community-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .community-card .community-stat-row {
            display: flex;
            gap: 28px;
            margin-top: 16px;
        }

        .community-stat-mini {
            text-align: center;
        }
        .community-stat-mini .mini-val {
            font-size: 28px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
        }
        .community-stat-mini .mini-lbl {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--neutral-bg);
            padding: var(--section-pad) 0;
        }

        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 20px 24px;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--black-asphalt);
            transition: color var(--transition-fast);
            letter-spacing: 0.2px;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            transition: transform var(--transition-base);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--black-asphalt);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            background: #FAFBFC;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 20px 24px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--primary);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-skew-strip {
            position: absolute;
            top: -30px;
            left: -5%;
            width: 120%;
            height: 80px;
            background: rgba(255, 255, 255, 0.06);
            transform: skewY(-3deg);
            pointer-events: none;
        }

        .cta-skew-strip.strip-2 {
            top: auto;
            bottom: -30px;
            background: rgba(255, 255, 255, 0.04);
            transform: skewY(2deg);
        }

        .cta-content {
            text-align: center;
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 34px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            line-height: 1.6;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .cta-form input {
            flex: 1;
            min-width: 240px;
            max-width: 380px;
            padding: 14px 20px;
            font-size: 16px;
            border-radius: var(--radius-sm);
            border: none;
            background: #FFFFFF;
            color: var(--black-asphalt);
            box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.08);
            transition: all var(--transition-fast);
        }

        .cta-form input:focus {
            box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.3), inset 0 2px 6px rgba(0, 0, 0, 0.08);
        }

        .btn-cta-submit {
            background: #FFFFFF;
            color: var(--primary);
            font-weight: 700;
            padding: 14px 32px;
            font-size: 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            cursor: pointer;
            border: 2px solid #FFFFFF;
            letter-spacing: 0.3px;
        }

        .btn-cta-submit:hover {
            background: var(--black-asphalt);
            color: #FFFFFF;
            border-color: var(--black-asphalt);
            transform: scale(1.03);
            box-shadow: 0 6px 22px rgba(0, 0, 0, 0.3);
        }

        .cta-privacy {
            margin-top: 16px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
        }

        .cta-privacy a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: underline;
            cursor: pointer;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0D1117;
            padding: 60px 0 30px;
            color: #9CA3AF;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #E5E7EB;
            margin-bottom: 16px;
            letter-spacing: 0.2px;
        }

        .footer-col a {
            display: block;
            color: #6B7280;
            font-size: 14px;
            padding: 4px 0;
            transition: color var(--transition-fast);
            cursor: pointer;
        }

        .footer-col a:hover {
            color: var(--primary);
        }

        .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 8px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #9CA3AF;
            font-size: 16px;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: #6B7280;
            letter-spacing: 0.2px;
        }

        .footer-bottom .domain-text {
            color: #9CA3AF;
            font-weight: 500;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 991px) {
            .features-row-top {
                grid-template-columns: 1fr;
            }
            .features-row-bottom {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .compare-wrapper {
                grid-template-columns: 1fr;
            }
            .compare-divider {
                flex-direction: row;
                padding: 16px 0;
                order: 2;
            }
            .compare-divider .dash-line {
                width: 60px;
                height: 1px;
                min-height: unset;
                background: repeating-linear-gradient(to right,
                        rgba(255, 255, 255, 0.3) 0px,
                        rgba(255, 255, 255, 0.3) 4px,
                        transparent 4px,
                        transparent 10px);
            }
            .compare-panel.panel-weak {
                order: 1;
            }
            .compare-panel.panel-strong {
                order: 3;
            }
            .community-grid {
                grid-template-columns: 1fr;
            }
            .hero-floating-data {
                position: static;
                margin-top: 30px;
                justify-content: flex-start;
            }
            .stats-card {
                grid-template-columns: repeat(3, 1fr);
            }
            .stat-number {
                font-size: 32px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
            }
            .hamburger-btn {
                display: block;
            }
            .hero-content {
                padding: 100px 0 60px;
                max-width: 100%;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-floating-data {
                flex-direction: column;
                gap: 10px;
            }
            .floating-data-value {
                font-size: 28px;
            }
            .stats-card {
                grid-template-columns: 1fr;
            }
            .stat-item+.stat-item {
                border-left: none;
                border-top: 1px solid var(--border-light);
            }
            .features-row-bottom {
                grid-template-columns: 1fr;
            }
            .feature-card.feature-large {
                padding: 28px;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .compare-panel {
                padding: 28px 20px;
            }
            .cta-content h2 {
                font-size: 26px;
            }
            .cta-form {
                flex-direction: column;
                align-items: center;
            }
            .cta-form input {
                max-width: 100%;
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            :root {
                --section-pad: 60px;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .btn {
                padding: 12px 22px;
                font-size: 14px;
            }
            .features-row-top {
                grid-template-columns: 1fr;
            }
            .stats-card {
                margin-top: -30px;
            }
            .stat-number {
                font-size: 28px;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .compare-divider {
                padding: 10px 0;
            }
            .vs-badge {
                width: 44px;
                height: 44px;
                font-size: 15px;
            }
            .floating-data-item {
                padding: 12px 16px;
            }
            .floating-data-value {
                font-size: 24px;
            }
        }

        @media (min-width: 992px) {
            .hero-floating-data {
                bottom: 120px;
                right: 60px;
            }
        }