/* ===== 全新设计系统：活力霓虹 + 科技动感 ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --bg: #0b0d17;
            --bg-card: rgba(18, 22, 45, 0.88);
            --text: #f0f2fa;
            --text-secondary: #a8b2d0;
            --primary: #ff6b35;
            --primary-dark: #e0552a;
            --primary-light: #ff8a5c;
            --secondary: #7c5cfc;
            --secondary-light: #a080ff;
            --gradient-1: #ff6b35;
            --gradient-2: #ff3d00;
            --gradient-3: #7c5cfc;
            --gradient: linear-gradient(135deg, #ff6b35 0%, #ff3d00 45%, #7c5cfc 100%);
            --gradient-bg: linear-gradient(160deg, #0b0d17 0%, #1a1040 50%, #0d1a2e 100%);
            --accent-glow: rgba(255, 107, 53, 0.20);
            --shadow: 0 16px 56px rgba(0, 0, 0, 0.7);
            --radius: 24px;
            --radius-sm: 14px;
            --glass: rgba(255, 255, 255, 0.04);
            --glass-border: rgba(255, 255, 255, 0.07);
            --transition: 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
            --font: 'Segoe UI', 'PingFang SC', 'Inter', system-ui, sans-serif;
            --grid-dot: rgba(255, 255, 255, 0.03);
        }
        [data-theme="light"] {
            --bg: #f4f6fc;
            --bg-card: rgba(255, 255, 255, 0.92);
            --text: #1a1a2e;
            --text-secondary: #4a4a62;
            --primary: #e0552a;
            --primary-dark: #cc2a00;
            --primary-light: #ff6b35;
            --secondary: #6a4cdb;
            --secondary-light: #8a6cff;
            --gradient-1: #ff6b35;
            --gradient-2: #e0552a;
            --gradient-3: #6a4cdb;
            --gradient: linear-gradient(135deg, #ff6b35 0%, #e0552a 45%, #6a4cdb 100%);
            --gradient-bg: linear-gradient(160deg, #f4f6fc 0%, #e8ecf8 50%, #f0f2fa 100%);
            --accent-glow: rgba(224, 85, 42, 0.10);
            --shadow: 0 12px 40px rgba(0, 0, 0, 0.07);
            --glass: rgba(255, 255, 255, 0.50);
            --glass-border: rgba(0, 0, 0, 0.05);
            --grid-dot: rgba(0, 0, 0, 0.03);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            transition: background var(--transition), color var(--transition);
            line-height: 1.7;
            padding: 0 20px;
            min-height: 100vh;
            position: relative;
            background-image: var(--gradient-bg);
        }
        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background-image:
                radial-gradient(1.5px 1.5px at 12px 20px, var(--grid-dot), transparent),
                radial-gradient(1.5px 1.5px at 40px 60px, var(--grid-dot), transparent),
                radial-gradient(1.5px 1.5px at 70px 140px, var(--grid-dot), transparent),
                radial-gradient(1.5px 1.5px at 100px 40px, var(--grid-dot), transparent),
                radial-gradient(1.5px 1.5px at 130px 80px, var(--grid-dot), transparent),
                radial-gradient(1.5px 1.5px at 170px 30px, var(--grid-dot), transparent),
                radial-gradient(1.5px 1.5px at 220px 110px, var(--grid-dot), transparent),
                radial-gradient(1.5px 1.5px at 270px 60px, var(--grid-dot), transparent);
            background-size: 320px 320px;
            background-repeat: repeat;
            opacity: 1;
            pointer-events: none;
            z-index: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            position: relative;
            z-index: 1;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--gradient);
            border-radius: 10px;
        }

        /* ===== 毛玻璃 ===== */
        .glass {
            background: var(--glass);
            backdrop-filter: blur(24px) saturate(180%);
            -webkit-backdrop-filter: blur(24px) saturate(180%);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .glass-sm {
            background: var(--glass);
            backdrop-filter: blur(16px) saturate(160%);
            -webkit-backdrop-filter: blur(16px) saturate(160%);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
        }

        /* ===== 渐变Banner ===== */
        .hero-banner {
            background: var(--gradient);
            border-radius: var(--radius);
            padding: 60px 40px 70px;
            margin: 20px 0 40px;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            box-shadow: 0 20px 80px rgba(255, 107, 53, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-banner .bg-shapes {
            position: absolute;
            inset: 0;
            overflow: hidden;
            pointer-events: none;
        }
        .hero-banner .bg-shapes .shape {
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
        }
        .hero-banner .bg-shapes .s1 {
            width: 500px;
            height: 500px;
            top: -200px;
            right: -150px;
            background: rgba(124, 92, 252, 0.15);
        }
        .hero-banner .bg-shapes .s2 {
            width: 350px;
            height: 350px;
            bottom: -100px;
            left: -80px;
            background: rgba(255, 200, 100, 0.10);
        }
        .hero-banner .bg-shapes .s3 {
            width: 200px;
            height: 200px;
            top: 20%;
            left: 20%;
            background: rgba(255, 255, 255, 0.04);
            filter: blur(60px);
        }
        .hero-banner .floating-dots {
            position: absolute;
            inset: 0;
            overflow: hidden;
            pointer-events: none;
        }
        .hero-banner .floating-dots span {
            position: absolute;
            display: block;
            width: 4px;
            height: 4px;
            background: rgba(255, 255, 255, 0.20);
            border-radius: 50%;
            animation: floatUp 6s infinite alternate ease-in-out;
        }
        @keyframes floatUp {
            0% {
                transform: translateY(0) scale(0.6);
                opacity: 0.1;
            }
            100% {
                transform: translateY(-60px) scale(1.2);
                opacity: 0.6;
            }
        }
        .hero-banner h1 {
            font-size: clamp(2.8rem, 8vw, 5.2rem);
            font-weight: 900;
            letter-spacing: -0.03em;
            text-shadow: 0 4px 50px rgba(0, 0, 0, 0.25);
            position: relative;
            z-index: 1;
            line-height: 1.1;
        }
        .hero-banner h1 .hl {
            display: inline-block;
            background: rgba(255, 255, 255, 0.08);
            padding: 0 20px;
            border-radius: 16px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-banner .sub {
            font-size: clamp(1.05rem, 2vw, 1.5rem);
            opacity: 0.9;
            max-width: 720px;
            margin: 16px auto 0;
            position: relative;
            z-index: 1;
            font-weight: 300;
            letter-spacing: 0.4px;
        }
        .hero-banner .badge-wrap {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
            margin-top: 20px;
            position: relative;
            z-index: 1;
        }
        .hero-banner .badge-wrap .badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(6px);
            padding: 6px 24px;
            border-radius: 60px;
            font-size: 0.8rem;
            letter-spacing: 1.5px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.8);
        }

        /* ===== 导航（底部固定式） ===== */
        header {
            position: fixed;
            bottom: 24px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            background: var(--bg-card);
            backdrop-filter: blur(30px) saturate(200%);
            -webkit-backdrop-filter: blur(30px) saturate(200%);
            border: 1px solid var(--glass-border);
            border-radius: 60px;
            padding: 6px 12px;
            box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
            width: auto;
            max-width: 92vw;
            transition: background var(--transition), border var(--transition);
        }
        header .container {
            padding: 0 8px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            flex-wrap: nowrap;
            max-width: 100%;
        }
        .logo {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            padding: 4px 10px;
        }
        .logo span {
            color: var(--text);
            font-weight: 300;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            padding: 2px 0;
        }
        nav::-webkit-scrollbar {
            display: none;
        }
        nav a {
            font-weight: 500;
            font-size: 0.78rem;
            color: var(--text-secondary);
            transition: color var(--transition), background var(--transition);
            padding: 6px 14px;
            border-radius: 40px;
            white-space: nowrap;
            background: transparent;
            border: 1px solid transparent;
        }
        nav a:hover,
        nav a.active {
            color: #fff;
            background: var(--gradient);
            border-color: transparent;
            box-shadow: 0 4px 20px var(--accent-glow);
        }
        nav a:hover {
            transform: scale(1.02);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .nav-actions button {
            background: var(--glass);
            border: 1px solid var(--glass-border);
            font-size: 1rem;
            cursor: pointer;
            color: var(--text);
            transition: color var(--transition), background var(--transition);
            padding: 5px 10px;
            border-radius: 40px;
            line-height: 1;
            white-space: nowrap;
        }
        .nav-actions button:hover {
            color: var(--primary);
            background: var(--glass);
            border-color: var(--primary);
        }
        .search-box {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--glass);
            border-radius: 40px;
            padding: 3px 10px 3px 14px;
            border: 1px solid var(--glass-border);
            transition: border var(--transition), box-shadow var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--accent-glow);
        }
        .search-box input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text);
            font-size: 0.78rem;
            padding: 4px 0;
            width: 80px;
            min-width: 60px;
        }
        .search-box input::placeholder {
            color: var(--text-secondary);
            opacity: 0.5;
        }
        .search-box button {
            background: none;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            font-size: 0.85rem;
            padding: 2px;
            transition: color var(--transition);
        }
        .search-box button:hover {
            color: var(--primary);
        }
        .mobile-toggle {
            display: none;
        }
        .theme-toggle .icon-light {
            display: inline;
        }
        .theme-toggle .icon-dark {
            display: none;
        }
        [data-theme="light"] .theme-toggle .icon-light {
            display: none;
        }
        [data-theme="light"] .theme-toggle .icon-dark {
            display: inline;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            font-size: 0.78rem;
            color: var(--text-secondary);
            padding: 18px 0 6px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            opacity: 0.6;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            opacity: 0.4;
        }

        /* ===== 卡片 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
            margin: 28px 0;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            backdrop-filter: blur(8px);
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-6px) scale(1.01);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
            border-color: rgba(255, 107, 53, 0.15);
        }
        .card .card-accent {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient);
            opacity: 0.4;
        }
        .card h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--text);
            font-weight: 700;
        }
        .card p {
            color: var(--text-secondary);
            font-size: 0.93rem;
            line-height: 1.7;
        }
        .card .icon {
            font-size: 2.2rem;
            margin-bottom: 12px;
            display: block;
        }
        .card .tag {
            display: inline-block;
            background: var(--glass);
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.68rem;
            color: var(--text-secondary);
            letter-spacing: 0.5px;
            border: 1px solid var(--glass-border);
            margin-top: 8px;
        }

        /* ===== Section ===== */
        .section-title {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 800;
            margin-bottom: 4px;
            letter-spacing: -0.02em;
            color: var(--text);
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
        }
        .section-title .hl {
            background: none;
            -webkit-text-fill-color: var(--text);
        }
        .section-sub {
            color: var(--text-secondary);
            font-size: 1.02rem;
            margin-bottom: 28px;
            padding-left: 18px;
            border-left: 3px solid var(--primary);
            font-weight: 300;
        }
        .section {
            padding: 40px 0;
        }

        /* ===== 文章 ===== */
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 22px 22px 26px;
            border: 1px solid var(--glass-border);
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: var(--shadow);
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
        }
        .article-card h4 {
            font-size: 1.08rem;
            margin-bottom: 4px;
            color: var(--text);
            font-weight: 700;
        }
        .article-card .meta {
            font-size: 0.75rem;
            color: var(--text-secondary);
            opacity: 0.6;
            margin-bottom: 8px;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .article-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .article-card .read-more {
            display: inline-block;
            margin-top: 10px;
            font-weight: 600;
            font-size: 0.82rem;
            color: var(--primary);
            border-bottom: 2px solid transparent;
            transition: border-color var(--transition);
        }
        .article-card .read-more:hover {
            border-bottom-color: var(--primary);
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--glass-border);
            padding: 14px 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-q {
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text);
            padding: 4px 0;
            user-select: none;
            transition: color var(--transition);
        }
        .faq-q:hover {
            color: var(--primary);
        }
        .faq-q::after {
            content: '＋';
            font-size: 1.3rem;
            color: var(--primary);
            transition: transform var(--transition);
            font-weight: 300;
        }
        .faq-item.open .faq-q::after {
            transform: rotate(45deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.35s ease;
            color: var(--text-secondary);
            padding: 0 0 0 6px;
            font-size: 0.93rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-a {
            max-height: 320px;
            padding: 12px 0 4px 6px;
        }

        /* ===== HowTo ===== */
        .howto-step {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            padding: 16px 0;
            border-bottom: 1px solid var(--glass-border);
        }
        .howto-step:last-child {
            border-bottom: none;
        }
        .howto-num {
            background: var(--gradient);
            color: #fff;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            flex-shrink: 0;
            box-shadow: 0 4px 16px var(--accent-glow);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .howto-content h4 {
            font-size: 1rem;
            color: var(--text);
            margin-bottom: 2px;
        }
        .howto-content p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== 轮播 ===== */
        .carousel {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius);
            background: var(--bg-card);
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow);
        }
        .carousel-track {
            display: flex;
            transition: transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
        }
        .carousel-slide {
            min-width: 100%;
            padding: 40px 32px;
            text-align: center;
        }
        .carousel-slide svg {
            margin: 0 auto 14px;
            border-radius: 16px;
            width: 100%;
            max-height: 210px;
        }
        .carousel-slide p {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
        }
        .carousel-slide p small {
            font-weight: 400;
            color: var(--text-secondary);
            opacity: 0.6;
            display: block;
            font-size: 0.82rem;
            margin-top: 2px;
        }
        .carousel-btn {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            background: var(--glass);
            backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            color: var(--text);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            font-size: 1.2rem;
            cursor: pointer;
            z-index: 10;
            transition: background var(--transition), color var(--transition), transform var(--transition);
            box-shadow: var(--shadow);
        }
        .carousel-btn:hover {
            background: var(--gradient);
            color: #fff;
            transform: translateY(-50%) scale(1.06);
        }
        .carousel-btn.prev {
            left: 12px;
        }
        .carousel-btn.next {
            right: 12px;
        }
        .carousel-dots {
            display: flex;
            justify-content: center;
            gap: 10px;
            padding: 16px 0 10px;
        }
        .carousel-dots span {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--text-secondary);
            opacity: 0.2;
            cursor: pointer;
            transition: opacity var(--transition), background var(--transition), transform var(--transition);
        }
        .carousel-dots span.active {
            opacity: 1;
            background: var(--primary);
            transform: scale(1.25);
        }

        /* ===== 统计 ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 20px;
            text-align: center;
        }
        .stat-item .number {
            font-size: 2.6rem;
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: block;
            line-height: 1.2;
        }
        .stat-item .label {
            color: var(--text-secondary);
            font-size: 0.88rem;
            font-weight: 400;
        }

        /* ===== 返回顶部 ===== */
        .back-top {
            position: fixed;
            bottom: 100px;
            right: 24px;
            background: var(--gradient);
            color: #fff;
            border: none;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: 0 8px 30px var(--accent-glow);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.4s, transform 0.4s, visibility 0.4s;
            z-index: 999;
            transform: scale(0.8);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: scale(1);
        }
        .back-top:hover {
            transform: scale(1.08);
            box-shadow: 0 12px 40px var(--accent-glow);
        }

        /* ===== 底部 ===== */
        footer {
            margin-top: 44px;
            padding: 40px 0 20px;
            border-top: 1px solid var(--glass-border);
            background: var(--bg-card);
            border-radius: var(--radius) var(--radius) 0 0;
            backdrop-filter: blur(8px);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 28px;
            margin-bottom: 28px;
        }
        .footer-grid h4 {
            font-size: 0.95rem;
            margin-bottom: 12px;
            color: var(--text);
            font-weight: 700;
        }
        .footer-grid a,
        .footer-grid p {
            display: block;
            color: var(--text-secondary);
            font-size: 0.85rem;
            padding: 3px 0;
            transition: color var(--transition), transform var(--transition);
        }
        .footer-grid a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--glass-border);
            font-size: 0.78rem;
            color: var(--text-secondary);
            opacity: 0.7;
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        .qr-placeholder {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 10px;
        }
        .qr-placeholder svg {
            width: 90px;
            height: 90px;
            border-radius: 12px;
            background: #fff;
            padding: 6px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
            transition: transform var(--transition);
        }
        .qr-placeholder svg:hover {
            transform: scale(1.04);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 820px) {
            body {
                padding: 0 12px;
            }
            header {
                bottom: 16px;
                padding: 4px 8px;
                border-radius: 40px;
            }
            header .container {
                gap: 4px;
            }
            .logo {
                font-size: 0.95rem;
                padding: 2px 6px;
            }
            nav a {
                font-size: 0.68rem;
                padding: 4px 10px;
            }
            .search-box input {
                width: 50px;
                min-width: 40px;
                font-size: 0.7rem;
            }
            .search-box {
                padding: 2px 6px 2px 10px;
            }
            .nav-actions button {
                font-size: 0.85rem;
                padding: 3px 8px;
            }
            .mobile-toggle {
                display: block;
                background: var(--glass);
                border: 1px solid var(--glass-border);
                border-radius: 40px;
                padding: 4px 10px;
                font-size: 1.1rem;
                color: var(--text);
                cursor: pointer;
            }
            nav {
                display: none;
                position: absolute;
                bottom: 110%;
                left: 0;
                right: 0;
                background: var(--bg-card);
                backdrop-filter: blur(30px);
                border: 1px solid var(--glass-border);
                border-radius: var(--radius);
                padding: 16px;
                flex-direction: column;
                gap: 6px;
                min-width: 200px;
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            }
            nav.open {
                display: flex;
            }
            nav a {
                font-size: 0.85rem;
                padding: 10px 16px;
                width: 100%;
                text-align: center;
                background: var(--glass);
                border-radius: 12px;
            }
            nav a:hover,
            nav a.active {
                background: var(--gradient);
                color: #fff;
            }
            .hero-banner {
                padding: 40px 20px 50px;
                min-height: 300px;
            }
            .hero-banner h1 {
                font-size: 2.2rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .howto-step {
                flex-direction: column;
                align-items: flex-start;
            }
            .carousel-btn {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
            .back-top {
                bottom: 80px;
                right: 16px;
                width: 42px;
                height: 42px;
                font-size: 1.1rem;
            }
            .carousel-slide {
                padding: 24px 16px;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .search-box input {
                width: 40px;
                min-width: 30px;
            }
            .card {
                padding: 18px 16px;
            }
            .hero-banner {
                padding: 30px 14px 40px;
                min-height: 240px;
            }
            .hero-banner h1 {
                font-size: 1.8rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section {
                padding: 28px 0;
            }
            .container {
                padding: 0 10px;
            }
            .logo {
                font-size: 0.8rem;
            }
            header {
                padding: 4px 6px;
                border-radius: 32px;
            }
            nav a {
                font-size: 0.6rem;
                padding: 4px 8px;
            }
        }

        /* ===== 滚动动画 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(36px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 懒加载占位 ===== */
        .lazy-placeholder {
            background: var(--glass);
            min-height: 140px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 0.8rem;
            border: 1px dashed var(--glass-border);
        }
        .lazy-placeholder svg {
            width: 100%;
            height: auto;
            max-height: 180px;
        }

        /* ===== 徽章 ===== */
        .badge-glow {
            background: var(--gradient);
            color: #fff;
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 0.68rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            display: inline-block;
            border: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 0 20px var(--accent-glow);
        }