:root {
            --bg: #faf8f5;
            --surface: #ffffff;
            --text: #1e2d2f;
            --text-secondary: #4d5e61;
            --text-muted: #6b7c7f;
            --accent: #c85a3c;
            --accent-dark: #a3442a;
            --accent-light: #fdf0eb;
            --accent-glow: rgba(200, 90, 60, 0.12);
            --teal: #3d6b6e;
            --teal-light: #e8f2f3;
            --border: #e8e3dd;
            --border-light: #f0ece8;
            --shadow-sm: 0 1px 4px rgba(30, 45, 47, 0.04);
            --shadow-md: 0 6px 20px rgba(30, 45, 47, 0.06);
            --shadow-lg: 0 16px 36px rgba(30, 45, 47, 0.09);
            --shadow-xl: 0 24px 48px rgba(30, 45, 47, 0.12);
            --radius-sm: 16px;
            --radius-md: 24px;
            --radius-lg: 36px;
            --radius-xl: 48px;
            --radius-full: 999px;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: 'Inter', system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.65;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image:
                radial-gradient(ellipse at 15% 10%, rgba(200, 90, 60, 0.025) 0%, transparent 55%),
                radial-gradient(ellipse at 78% 60%, rgba(61, 107, 110, 0.02) 0%, transparent 50%),
                radial-gradient(ellipse at 40% 85%, rgba(200, 90, 60, 0.018) 0%, transparent 45%);
            background-attachment: fixed;
        }

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ── HEADER ────────────────────── */
        header {
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 120;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }

        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 16px 0;
            gap: 14px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: -0.5px;
            box-shadow: 0 4px 14px rgba(200, 90, 60, 0.28);
        }

        .logo-text {
            font-weight: 780;
            font-size: 1.35rem;
            color: var(--text);
            letter-spacing: -0.4px;
        }
        .logo-text span {
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
            font-size: 0.93rem;
        }

        .nav-links a {
            text-decoration: none;
            font-weight: 530;
            color: var(--text-secondary);
            transition: var(--transition);
            padding: 7px 15px;
            border-radius: var(--radius-full);
            white-space: nowrap;
            position: relative;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent);
            background: var(--accent-light);
        }

        .btn-download-nav {
            background: var(--accent) !important;
            color: #fff !important;
            padding: 9px 22px !important;
            border-radius: var(--radius-full) !important;
            font-weight: 600 !important;
            box-shadow: 0 3px 12px rgba(200, 90, 60, 0.22);
            transition: var(--transition) !important;
        }
        .btn-download-nav:hover {
            background: var(--accent-dark) !important;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(200, 90, 60, 0.3);
        }

        /* ── HERO ────────────────────── */
        .hero {
            display: grid;
            grid-template-columns: 1fr 0.85fr;
            gap: 50px;
            padding: 60px 0 52px;
            align-items: center;
        }

        .hero-left .version-badge {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            background: var(--accent-light);
            color: var(--accent);
            font-weight: 640;
            font-size: 0.88rem;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 18px;
            letter-spacing: -0.2px;
            animation: pulse-badge 2.6s ease-in-out infinite;
        }
        @keyframes pulse-badge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(200, 90, 60, 0.25);
            }
            50% {
                box-shadow: 0 0 0 12px rgba(200, 90, 60, 0);
            }
        }
        .version-badge .dot {
            width: 9px;
            height: 9px;
            background: #3cb878;
            border-radius: 50%;
            animation: blink-dot 1.5s ease-in-out infinite;
        }
        @keyframes blink-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.35;
            }
        }

        .hero-left h1 {
            font-size: clamp(2.2rem, 4.5vw, 3.4rem);
            font-weight: 800;
            line-height: 1.18;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -0.6px;
        }
        .hero-left h1 .accent {
            color: var(--accent);
            position: relative;
            display: inline-block;
        }
        .hero-left h1 .accent::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            width: 100%;
            height: 8px;
            background: rgba(200, 90, 60, 0.16);
            border-radius: 4px;
            z-index: -1;
        }

        .hero-desc {
            font-size: 1.08rem;
            color: var(--text-secondary);
            max-width: 520px;
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .hero-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 38px;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            padding: 13px 30px;
            border-radius: var(--radius-full);
            text-decoration: none;
            font-weight: 620;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 7px;
            box-shadow: 0 8px 22px rgba(200, 90, 60, 0.26);
            border: none;
            cursor: pointer;
            font-size: 1rem;
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 14px 30px rgba(200, 90, 60, 0.34);
        }

        .btn-outline {
            background: transparent;
            border: 1.6px solid var(--accent);
            color: var(--accent);
            padding: 12px 26px;
            border-radius: var(--radius-full);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.98rem;
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: var(--accent-light);
            border-color: var(--accent-dark);
            color: var(--accent-dark);
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            gap: 36px;
            flex-wrap: wrap;
        }
        .stat-block h3 {
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.15;
            letter-spacing: -0.3px;
        }
        .stat-block p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-top: 2px;
        }

        /* 右侧视觉 */
        .hero-right {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 30px 26px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            text-align: center;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 14px;
            position: relative;
            overflow: hidden;
        }
        .hero-right::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 140px;
            height: 140px;
            background: radial-gradient(circle, rgba(200, 90, 60, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .floating-pill {
            background: #fff;
            border-radius: 50px;
            padding: 12px 24px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            font-weight: 520;
            display: flex;
            align-items: center;
            gap: 10px;
            animation: float 3.2s ease-in-out infinite;
            font-size: 0.93rem;
            z-index: 1;
            position: relative;
        }
        .floating-pill:nth-child(2) {
            animation-delay: 0.55s;
        }
        .floating-pill:nth-child(3) {
            animation-delay: 1.1s;
        }
        .floating-pill .pill-icon {
            font-size: 1.4rem;
        }
        @keyframes float {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-7px);
            }
        }

        /* ── SECTION通用 ────────────────── */
        .section {
            padding: 40px 0 48px;
        }
        .section-title {
            text-align: center;
            font-size: clamp(1.6rem, 3vw, 2.1rem);
            font-weight: 750;
            margin-bottom: 14px;
            color: var(--text);
            letter-spacing: -0.35px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            margin-bottom: 40px;
            font-size: 0.98rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 52px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 13px auto 0;
        }

        /* ── 长内容区 ────────────────── */
        .long-content {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            max-width: 900px;
            margin: 0 auto;
        }
        .long-content h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--teal);
            margin: 24px 0 10px;
            letter-spacing: -0.2px;
        }
        .long-content h3:first-child {
            margin-top: 0;
        }
        .long-content p {
            color: var(--text-secondary);
            margin-bottom: 14px;
            font-size: 0.96rem;
            line-height: 1.7;
        }
        .long-content .highlight-box {
            background: var(--teal-light);
            border-radius: var(--radius-sm);
            padding: 18px 22px;
            margin: 18px 0;
            border-left: 4px solid var(--teal);
            font-size: 0.93rem;
            color: #2a5053;
            line-height: 1.6;
        }

        /* ── 卡片网格 ────────────────── */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 22px;
        }

        .eco-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            text-decoration: none;
            color: inherit;
            display: flex;
            flex-direction: column;
            gap: 10px;
            position: relative;
            overflow: hidden;
        }
        .eco-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
            border-radius: 0 0 var(--radius-md) var(--radius-md);
        }
        .eco-card:hover::after {
            transform: scaleX(1);
        }
        .eco-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }
        .eco-card .card-icon {
            font-size: 2.2rem;
            line-height: 1;
        }
        .eco-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.2px;
        }
        .eco-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            flex: 1;
            line-height: 1.55;
        }
        .eco-card .card-link-text {
            font-weight: 620;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 0.9rem;
            margin-top: auto;
        }

        /* ── 教程卡片 ────────────────── */
        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
            gap: 18px;
        }
        .tutorial-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            border: 1px solid var(--border-light);
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
            display: flex;
            align-items: flex-start;
            gap: 12px;
            box-shadow: var(--shadow-sm);
        }
        .tutorial-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
            transform: translateX(3px);
        }
        .tutorial-card .tut-num {
            font-weight: 800;
            font-size: 1.6rem;
            color: var(--accent);
            opacity: 0.7;
            line-height: 1;
            flex-shrink: 0;
            min-width: 32px;
        }
        .tutorial-card .tut-info h4 {
            font-size: 0.98rem;
            font-weight: 650;
            color: var(--text);
            margin-bottom: 3px;
            letter-spacing: -0.15px;
        }
        .tutorial-card .tut-info p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.4;
        }

        /* ── 下载聚合表 ────────────────── */
        .dl-table-wrap {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            background: var(--surface);
            border: 1px solid var(--border-light);
        }
        .dl-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
            text-align: left;
        }
        .dl-table thead th {
            background: #faf7f3;
            padding: 16px 18px;
            font-weight: 680;
            font-size: 0.9rem;
            color: var(--text);
            border-bottom: 2px solid var(--border);
            letter-spacing: -0.2px;
            white-space: nowrap;
        }
        .dl-table tbody td {
            padding: 15px 18px;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.9rem;
            color: var(--text-secondary);
            vertical-align: middle;
        }
        .dl-table tbody tr {
            transition: var(--transition);
        }
        .dl-table tbody tr:hover {
            background: #fefcf9;
        }
        .dl-table .dl-link {
            color: var(--accent);
            text-decoration: none;
            font-weight: 620;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition);
        }
        .dl-table .dl-link:hover {
            color: var(--accent-dark);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .platform-badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--teal-light);
            color: var(--teal);
            white-space: nowrap;
        }
        .platform-badge.win {
            background: #e8f0f8;
            color: #2b5a8c;
        }
        .platform-badge.mac {
            background: #f0eef8;
            color: #4b3d78;
        }
        .platform-badge.android {
            background: #e8f5e9;
            color: #2e5c30;
        }

        /* ── FAQ ────────────────────── */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-list details {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 6px 20px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .faq-list details[open] {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
            padding-bottom: 16px;
        }
        .faq-list summary {
            font-weight: 650;
            font-size: 1rem;
            cursor: pointer;
            padding: 16px 0;
            color: var(--text);
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            letter-spacing: -0.15px;
            outline: none;
        }
        .faq-list summary::-webkit-details-marker {
            display: none;
        }
        .faq-list summary::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 300;
            color: var(--accent);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-list details[open] summary::after {
            content: '−';
            transform: rotate(180deg);
        }
        .faq-list .faq-answer {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            padding: 4px 0 8px;
        }

        /* ── CTA ────────────────────── */
        .cta-section {
            background: linear-gradient(115deg, #1e2d2f 0%, #2a4043 40%, #1e3538 100%);
            border-radius: var(--radius-xl);
            padding: 50px 36px;
            margin: 44px 0 40px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-xl);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(200, 90, 60, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 160px;
            height: 160px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
            letter-spacing: -0.3px;
        }
        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.88;
            margin-bottom: 30px;
            position: relative;
            z-index: 1;
        }
        .btn-cta {
            background: #fff;
            color: #1e2d2f;
            padding: 15px 42px;
            border-radius: var(--radius-full);
            font-weight: 700;
            text-decoration: none;
            font-size: 1.05rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 9px;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
            position: relative;
            z-index: 1;
        }
        .btn-cta:hover {
            background: #fef5f0;
            transform: scale(1.03);
            box-shadow: 0 14px 34px rgba(0, 0, 0, 0.28);
        }

        /* ── FOOTER ────────────────── */
        .footer {
            background: #1a2526;
            color: #b5c4c6;
            padding: 44px 0 24px;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
        }
        .footer-col h4 {
            color: #fff;
            margin-bottom: 12px;
            font-size: 0.95rem;
            letter-spacing: -0.15px;
        }
        .footer-col a {
            color: #b5c4c6;
            text-decoration: none;
            display: block;
            margin-bottom: 7px;
            font-size: 0.87rem;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .footer-copyright {
            text-align: center;
            padding-top: 32px;
            font-size: 0.82rem;
            border-top: 1px solid #334546;
            margin-top: 24px;
            color: #8a9c9e;
        }

        /* ── RESPONSIVE ────────────── */
        @media (max-width: 900px) {
            .hero {
                grid-template-columns: 1fr;
                gap: 32px;
                padding: 36px 0 32px;
            }
            .hero-right {
                order: -1;
                padding: 20px 16px;
            }
            .hero-left h1 {
                font-size: 1.9rem;
            }
            .nav-bar {
                flex-direction: column;
                align-items: stretch;
            }
            .nav-links {
                gap: 6px;
                font-size: 0.84rem;
            }
            .nav-links a {
                padding: 6px 12px;
            }
            .long-content {
                padding: 24px 18px;
            }
            .cta-section {
                padding: 32px 20px;
                border-radius: var(--radius-lg);
            }
            .dl-table {
                min-width: 480px;
            }
        }
        @media (max-width: 480px) {
            .hero-buttons {
                flex-direction: column;
                gap: 10px;
            }
            .hero-buttons a {
                text-align: center;
                justify-content: center;
            }
            .hero-stats {
                gap: 20px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .tutorial-grid {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 14px;
            }
        }