/* 裁音魔方 · 页面样式（自 pages/convert.html 抽取，修改后请同步对应页面） */
        * { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Poppins', 'Segoe UI', sans-serif; }
        :root {
            --primary: #4CAF50;
            --primary-light: #81C784;
            --primary-dark: #388E3C;
            --secondary: #8BC34A;
            --accent: #CDDC39;
            --dark-bg: #121212;
            --darker-bg: #0A0A0A;
            --card-bg: #1E1E1E;
            --card-light: #252525;
            --card-border: #333333;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B0B0;
            --text-muted: #6B6B6B;
            --warning: #FF9800;
            --error: #F44336;
            --gold: #FFD700;
            --gradient: linear-gradient(135deg, var(--primary), var(--primary-dark));
            --radius: 24px;
            --shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
        }
        body { background-color: var(--darker-bg); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; }
        a { text-decoration: none; color: inherit; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

        /* ===== 导航栏 ===== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background-color: rgba(10, 10, 10, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            padding: 20px 0;
            border-bottom: 1px solid rgba(76, 175, 80, 0.1);
            transition: all 0.3s ease;
        }
        .navbar.scrolled {
            padding: 15px 0;
            background-color: rgba(10, 10, 10, 0.98);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            flex-shrink: 0;
        }
        .logo i {
            font-size: 28px;
        }
        .logo span {
            color: white;
        }
        .nav-links {
            display: flex;
            gap: 30px;
            align-items: center;
        }
        .nav-links a {
            font-weight: 500;
            font-size: 16px;
            transition: color 0.3s;
            position: relative;
            color: var(--text-primary);
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: width 0.3s;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-buttons {
            display: flex;
            gap: 15px;
            align-items: center;
            flex-shrink: 0;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 5px;
        }
        .mobile-menu {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--darker-bg);
            padding: 20px;
            border-top: 1px solid var(--card-border);
            transform: translateY(-100%);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 999;
        }
        .mobile-menu.active {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }
        .mobile-nav-links {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 30px;
        }
        .mobile-nav-links a {
            font-size: 18px;
            padding: 10px 0;
            border-bottom: 1px solid var(--card-border);
            color: var(--text-secondary);
        }
        .mobile-nav-links a:hover {
            color: var(--primary);
        }
        .mobile-buttons {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background-color: var(--dark-bg);
            padding: 80px 0 40px;
            margin-top: 100px;
            border-top: 1px solid var(--card-border);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 40px;
            margin-bottom: 50px;
        }
        .footer-column h3 {
            font-size: 20px;
            margin-bottom: 25px;
            color: var(--primary);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: var(--text-secondary);
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid var(--card-border);
            color: var(--text-secondary);
            font-size: 14px;
        }
        .beian-link {
            color: var(--text-secondary);
            text-decoration: none;
            margin: 0 5px;
        }
        .beian-link:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 60px;
            background: linear-gradient(180deg, var(--darker-bg) 0%, rgba(18, 18, 18, 0.95) 100%);
            position: relative; overflow: hidden; border-bottom: 1px solid var(--card-border);
        }
        .hero::before {
            content: '';
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background: radial-gradient(circle at 20% 40%, rgba(76, 175, 80, 0.06) 0%, transparent 50%);
        }
        .hero .container { position: relative; z-index: 1; }
        .hero-content { text-align: center; max-width: 800px; margin: 0 auto; }
        .hero-content h1 {
            font-size: 44px; font-weight: 700; line-height: 1.15; margin-bottom: 12px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
        }
        .hero-content p { font-size: 18px; color: var(--text-secondary); margin-bottom: 24px; max-width: 650px; margin-left: auto; margin-right: auto; }
        .hero-content .hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* ===== 功能特色 ===== */
        .section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 50px; }
        .section-title h2 { font-size: 36px; font-weight: 700; margin-bottom: 12px; }
        .section-title p { color: var(--text-secondary); max-width: 600px; margin: 0 auto; }
        .features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 28px; }
        .feature-card {
            background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 20px; padding: 32px 28px;
            transition: all 0.3s; text-align: center;
        }
        .feature-card:hover { border-color: var(--primary); transform: translateY(-6px); box-shadow: 0 15px 30px rgba(0,0,0,0.2); }
        .feature-card .icon {
            width: 64px; height: 64px; background: rgba(76,175,80,0.12); border-radius: 16px;
            display: flex; align-items: center; justify-content: center; margin: 0 auto 18px;
            font-size: 28px; color: var(--primary);
        }
        .feature-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
        .feature-card p { color: var(--text-secondary); font-size: 15px; line-height: 1.7; }

        /* ===== 工具卡片 ===== */
        .convert-card {
            background: var(--card-bg); border-radius: var(--radius); padding: 2.5rem 2.8rem;
            margin: 2.5rem 0 3rem; border: 1px solid var(--card-border); box-shadow: var(--shadow);
            transition: border-color 0.3s;
        }
        .convert-card:hover { border-color: rgba(76,175,80,0.25); }
        .card-header { display: flex; align-items: center; gap: 16px; margin-bottom: 1.2rem; flex-wrap: wrap; }
        .card-header i { font-size: 2.2rem; color: var(--primary); }
        .card-header h2 { font-weight: 600; font-size: 1.9rem; }

        /* ===== 三步引导 ===== */
        .steps-guide {
            display: flex; justify-content: center; gap: 30px; margin: 0 0 24px 0; padding: 16px 24px;
            background: rgba(255,255,255,0.02); border-radius: 16px; border: 1px solid var(--card-border); flex-wrap: wrap;
        }
        .steps-guide .step { display: flex; align-items: center; gap: 10px; color: var(--text-secondary); font-size: 14px; }
        .steps-guide .step .num {
            width: 30px; height: 30px; border-radius: 50%; background: var(--gradient);
            display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px; color: white; flex-shrink: 0;
        }
        .steps-guide .step .arrow { color: var(--text-muted); font-size: 16px; margin-left: 4px; }
        .steps-guide .step:last-child .arrow { display: none; }

        /* ===== 上传区域 ===== */
        .upload-zone {
            background: rgba(255,255,255,0.02); border: 2px dashed var(--card-border); border-radius: 20px;
            padding: 2.8rem 2rem; text-align: center; transition: all 0.3s; cursor: default; position: relative;
        }
        .upload-zone:hover { border-color: var(--primary); background: rgba(76,175,80,0.04); }
        .upload-zone.dragover { border-color: var(--primary); background: rgba(76,175,80,0.08); }
        .upload-icon { font-size: 64px; color: var(--primary); margin-bottom: 20px; transition: all 0.3s; }
        .upload-icon.has-files { color: var(--gold); opacity: 1; }
        .upload-zone h3 { font-weight: 500; font-size: 1.4rem; }
        .upload-zone p { color: var(--text-secondary); margin: 0.4rem 0 1.6rem; }
        .file-input-wrap { display: inline-block; position: relative; }
        .file-input-wrap input[type="file"] { position: absolute; left: 0; top: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }

        /* ===== 文件列表 ===== */
        .file-list-container {
            margin-top: 1.5rem; display: none; max-height: 280px; overflow-y: auto;
            border-radius: 16px; border: 1px solid var(--card-border); background: rgba(0,0,0,0.2);
        }
        .file-list-container.active { display: block; }
        .file-list-header { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; border-bottom: 1px solid var(--card-border); font-size: 14px; color: var(--text-secondary); background: rgba(0,0,0,0.15); }
        .file-list-header .count { color: var(--primary); font-weight: 600; }
        .file-list-header .clear-all { color: var(--error); cursor: pointer; transition: color 0.3s; background: none; border: none; font-size: 13px; }
        .file-list-header .clear-all:hover { color: #ff6b6b; }
        .file-list-items { list-style: none; padding: 4px; }
        .file-list-item { display: flex; align-items: center; padding: 8px 14px; border-radius: 8px; margin-bottom: 3px; background: rgba(255,255,255,0.02); transition: all 0.3s; gap: 10px; flex-wrap: wrap; animation: fadeInItem 0.3s ease; }
        @keyframes fadeInItem { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
        .file-list-item:hover { background: rgba(255,255,255,0.05); }
        .file-list-item .file-icon { font-size: 18px; color: var(--primary); flex-shrink: 0; width: 28px; text-align: center; }
        .file-list-item .file-name { flex: 1; font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; text-align: left; min-width: 60px; }
        .file-list-item .file-size { font-size: 11px; color: var(--text-secondary); flex-shrink: 0; }
        .file-list-item .file-status { font-size: 11px; padding: 2px 12px; border-radius: 20px; flex-shrink: 0; display: flex; align-items: center; gap: 4px; }
        .file-list-item .file-status.ready { background: rgba(76,175,80,0.12); color: var(--primary); }
        .file-list-item .file-status.done { background: rgba(76,175,80,0.2); color: var(--primary); }
        .file-list-item .file-status.processing { background: rgba(255,152,0,0.15); color: var(--warning); }
        .file-list-item .file-status.processing i { animation: spin 0.8s linear infinite; }
        @keyframes spin { 100% { transform: rotate(360deg); } }
        .file-list-item .file-status.error { background: rgba(244,67,54,0.15); color: var(--error); }
        .file-list-item .file-status.unlocked { background: rgba(255,215,0,0.2); color: var(--gold); }
        .file-list-item .remove-file { color: var(--text-secondary); cursor: pointer; transition: color 0.3s; background: none; border: none; font-size: 14px; padding: 0 4px; }
        .file-list-item .remove-file:hover { color: var(--error); }

        /* ===== 格式选择 ===== */
        .format-selector-wrap { margin: 1.2rem 0 0.8rem; display: none; }
        .format-selector-wrap.active { display: block; }
        .format-selector-wrap .label { font-size: 14px; color: var(--text-secondary); margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
        .format-selector-wrap .label .selected-format { color: var(--primary); font-weight: 600; }
        .format-selector { display: flex; gap: 10px; flex-wrap: wrap; }
        .format-option {
            padding: 8px 22px; border-radius: 30px; border: 2px solid var(--card-border);
            background: transparent; color: var(--text-secondary); cursor: pointer;
            transition: all 0.3s; font-size: 14px; font-weight: 500; position: relative;
        }
        .format-option:hover { border-color: var(--primary); color: var(--text-primary); }
        .format-option.active { border-color: var(--primary); background: rgba(76,175,80,0.15); color: var(--primary); }
        .format-option.active::after { content: '✓'; margin-left: 6px; font-weight: 700; }
        .format-option .sub { font-size: 11px; opacity: 0.5; font-weight: 400; }
        .format-option .recommend { font-size: 9px; background: var(--gold); color: #1a1a1a; padding: 0 8px; border-radius: 10px; margin-left: 4px; font-weight: 700; }

        /* ===== 操作按钮 ===== */
        .action-bar { display: flex; flex-wrap: wrap; gap: 1.2rem; justify-content: center; margin-top: 1.5rem; }
        .action-bar .action-hint { width: 100%; text-align: center; font-size: 13px; color: var(--text-muted); }

        /* ===== 全屏进度弹窗（首页风格） ===== */
        .processing-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.8);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 2000;
        }

        .processing-content {
            background-color: var(--card-bg);
            border-radius: 20px;
            padding: 50px;
            text-align: center;
            max-width: 500px;
            width: 90%;
            border: 1px solid var(--card-border);
        }

        .processing-content h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .processing-content .sub {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .processing-spinner {
            width: 80px;
            height: 80px;
            border: 5px solid rgba(76, 175, 80, 0.2);
            border-radius: 50%;
            border-top-color: var(--primary);
            animation: spin 1s linear infinite;
            margin: 0 auto 30px;
        }
        @keyframes spin {
            100% {
                transform: rotate(360deg);
            }
        }

        .progress-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 24px;
        }
        .progress-track {
            flex: 1;
            height: 8px;
            border-radius: 999px;
            background: rgba(76, 175, 80, 0.15);
            overflow: hidden;
        }
        .progress-fill {
            height: 100%;
            width: 0%;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--primary), #81C784);
            transition: width 0.6s ease;
        }
        .progress-text {
            min-width: 44px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            text-align: right;
        }

        .processing-details {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid var(--card-border);
        }
        .processing-step {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
            color: var(--text-secondary);
        }
        .processing-step.active {
            color: var(--primary);
        }
        .processing-step.completed i {
            color: var(--success, #4CAF50);
        }

        /* ===== 结果区 ===== */
        .result-box { margin-top: 2.2rem; border-top: 1px solid var(--card-border); padding-top: 1.8rem; display: none; }
        .result-box.active { display: block; }
        .result-item {
            background: rgba(255,255,255,0.03); border-radius: 16px; padding: 1rem 1.5rem;
            border: 1px solid var(--card-border); transition: 0.3s; margin-bottom: 0.6rem; animation: fadeInItem 0.3s ease;
        }
        .result-item:last-child { margin-bottom: 0; }
        .result-item:hover { border-color: var(--primary); }
        .result-header-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
        .result-meta { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 120px; }
        .result-meta .file-icon { font-size: 1.2rem; color: var(--primary); flex-shrink: 0; }
        .result-meta .info .file-name { font-weight: 500; font-size: 0.85rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .result-meta .info .file-size { font-size: 0.75rem; color: var(--text-secondary); }
        .result-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
        /* ===== 试听播放器 ===== */
        .result-badge {
            padding: 1px 12px; border-radius: 40px; font-size: 0.65rem; font-weight: 600;
            display: inline-flex; align-items: center; gap: 4px; flex-shrink: 0;
            background: rgba(255, 152, 0, 0.2); color: var(--warning);
        }
        .result-badge.unlocked { background: rgba(255, 215, 0, 0.2); color: var(--gold); }
        .result-actions-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; align-items: center; }
        .audio-player-wrapper { margin-top: 10px; }
        .audio-player-simple { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
        .play-btn-simple {
            width: 40px; height: 40px; border-radius: 50%; background: var(--gradient); color: white;
            border: none; cursor: pointer; display: flex; align-items: center; justify-content: center;
            font-size: 15px; transition: all 0.3s; flex-shrink: 0;
        }
        .play-btn-simple:hover { transform: scale(1.08); box-shadow: 0 6px 16px rgba(76,175,80,0.35); }
        .progress-container-simple {
            flex: 1; min-width: 120px; height: 6px; border-radius: 3px;
            background: rgba(255,255,255,0.1); cursor: pointer; position: relative;
        }
        .progress-bar-simple {
            height: 100%; border-radius: 3px; background: var(--gradient); width: 0%; transition: width 0.2s linear;
        }
        .time-display-simple { font-size: 12px; color: var(--text-secondary); min-width: 90px; text-align: right; }
        .unlock-btn {
            background: linear-gradient(135deg, #FFD700, #F4A460); color: #1a1a1a; border: none;
            padding: 5px 16px; border-radius: 20px; font-weight: 600; font-size: 12px;
            cursor: pointer; transition: all 0.3s; display: inline-flex; align-items: center; gap: 6px;
        }
        .unlock-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255, 215, 0, 0.3); }
        .unlock-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
        @keyframes pulse-border {
            0%,100% { box-shadow: 0 0 0 0 rgba(255,215,0,0.4); }
            50% { box-shadow: 0 0 0 8px rgba(255,215,0,0.1); }
        }
        @media (max-width: 480px) { .audio-player-simple { gap: 8px; } .time-display-simple { min-width: auto; } }
        .btn {
            padding: 12px 28px; border-radius: 8px; font-weight: 600; cursor: pointer;
            transition: all 0.3s; border: none; font-size: 16px; display: inline-flex; align-items: center; gap: 8px;
        }
        .btn-primary { background: var(--gradient); color: white; }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(76,175,80,0.3); }
        .btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }
        .btn-secondary { background-color: transparent; color: var(--text-primary); border: 1px solid var(--card-border); }
        .btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
        .btn-sm { padding: 6px 14px; font-size: 13px; }
        .download-btn-single { background: var(--gradient); color: white; border: none; padding: 4px 16px; border-radius: 20px; font-weight: 600; font-size: 12px; cursor: pointer; transition: all 0.3s; display: inline-flex; align-items: center; gap: 6px; }
        .download-btn-single:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(76,175,80,0.3); }

        /* ===== 技术优势 ===== */
        .tech-section { padding: 80px 0; background: rgba(255,255,255,0.02); border-top: 1px solid var(--card-border); border-bottom: 1px solid var(--card-border); }
        .tech-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 28px; }
        .tech-item { text-align: center; padding: 24px 20px; background: var(--card-bg); border-radius: 16px; border: 1px solid var(--card-border); transition: 0.3s; }
        .tech-item:hover { border-color: var(--primary); }
        .tech-item .icon { font-size: 36px; color: var(--primary); margin-bottom: 12px; }
        .tech-item h4 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
        .tech-item p { font-size: 14px; color: var(--text-secondary); }

        /* ===== CTA ===== */
        .cta-section { padding: 80px 0; text-align: center; background: linear-gradient(180deg, var(--darker-bg), rgba(18,18,18,0.9)); border-top: 1px solid var(--card-border); }
        .cta-section h2 { font-size: 36px; font-weight: 700; margin-bottom: 12px; }
        .cta-section p { color: var(--text-secondary); max-width: 500px; margin: 0 auto 28px; }
        .cta-section .cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* ===== Toast ===== */
        .toast {
            position: fixed; bottom: 30px; right: 30px; background: var(--card-bg);
            border: 1px solid var(--primary); border-radius: 16px; padding: 0.7rem 1.6rem;
            box-shadow: var(--shadow); color: var(--text-primary); font-weight: 500;
            display: flex; align-items: center; gap: 10px; z-index: 999;
            transform: translateY(100px); opacity: 0; transition: all 0.4s ease; pointer-events: none; max-width: 90vw;
        }
        .toast.show { transform: translateY(0); opacity: 1; pointer-events: auto; }
        .toast i { font-size: 1.2rem; color: var(--primary); }
        .toast.error { border-color: var(--error); }
        .toast.error i { color: var(--error); }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .hero-content h1 { font-size: 36px; }
            .steps-guide { gap: 16px; padding: 14px 16px; }
            .steps-guide .step { font-size: 13px; }
        }
        @media (max-width: 768px) {
            .navbar { padding: 15px 0; }
            .nav-links,
            .nav-buttons { display: none; }
            .mobile-menu-btn { display: block; }
            .hero { padding: 110px 0 30px; }
            .hero-content h1 { font-size: 28px; }
            .convert-card { padding: 1.5rem; }
            .toast { right: 16px; left: 16px; bottom: 16px; }
            .format-selector { gap: 6px; }
            .format-option { padding: 6px 14px; font-size: 13px; }
            .steps-guide { flex-direction: column; align-items: center; gap: 6px; }
            .steps-guide .step .arrow { display: none; }
            .processing-content { padding: 28px 20px; }
            .result-header-row { flex-direction: column; align-items: flex-start; }
            .features-grid { grid-template-columns: 1fr; }
            .tech-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 480px) {
            .hero-content h1 { font-size: 26px; }
            .upload-zone { padding: 1.5rem 1rem; }
            .btn { padding: 8px 16px; font-size: 0.85rem; }
            .format-option { padding: 4px 10px; font-size: 12px; }
        }

        .payment-overlay {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background-color: rgba(0,0,0,0.85); display: none; justify-content: center; align-items: center;
            z-index: 3000; backdrop-filter: blur(6px);
        }
        .payment-overlay.active { display: flex; }
        .payment-modal {
            background: var(--card-bg); border-radius: 24px; padding: 32px 36px;
            max-width: 380px; width: 90%; border: 1px solid var(--card-border);
            box-shadow: 0 30px 60px rgba(0,0,0,0.7); text-align: center;
        }
        .payment-modal .lock-icon { font-size: 44px; color: var(--gold); margin-bottom: 8px; }
        .payment-modal h3 { font-size: 20px; font-weight: 600; margin-bottom: 4px; }
        .payment-modal .sub-text { color: var(--text-secondary); font-size: 14px; margin-bottom: 18px; }
        .payment-modal .price-tag {
            font-size: 36px; font-weight: 700; color: var(--gold);
            margin-bottom: 20px; padding: 8px; background: rgba(255,215,0,0.06);
            border-radius: 12px; border: 1px solid rgba(255,215,0,0.1);
        }
        .payment-options { display: flex; flex-direction: column; gap: 12px; margin-bottom: 16px; }
        .payment-btn {
            display: flex; align-items: center; justify-content: center; gap: 8px;
            padding: 12px; border-radius: 12px; font-weight: 600; font-size: 16px;
            border: none; cursor: pointer; transition: all 0.3s;
        }
        .payment-btn.wechat { background: #07C160; color: white; }
        .payment-btn.wechat:hover { background: #06ad56; transform: translateY(-2px); }
        .payment-btn.alipay { background: #1677FF; color: white; }
        .payment-btn.alipay:hover { background: #0f68e0; transform: translateY(-2px); }
        .payment-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
        .payment-cancel {
            background: none; border: none; color: var(--text-secondary);
            cursor: pointer; font-size: 14px; transition: color 0.3s;
        }
        .payment-cancel:hover { color: var(--error); }