:root {
            --primary: #ea580c;
            --primary-hover: #c2410c;
            --bg: #0c0a09;
            --surface: #161311;
            --surface-hover: #221c17;
            --surface-card: #13100e;
            --border: #2c241e;
            --border-light: #3d3128;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --text-subtle: #78716c;
            --accent: #f97316;
            --accent-glow: rgba(249, 115, 22, 0.16);
            --success: #10b981;
            --success-bg: rgba(16, 185, 129, 0.1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; }
        body {
            background-color: var(--bg);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* 导航条 */
        nav {
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            font-size: 19px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            letter-spacing: -0.3px;
        }
        .logo-mark {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, rgba(234,88,12,0.3) 0%, rgba(249,115,22,0.2) 100%);
            border: 1px solid rgba(249,115,22,0.4);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
        }
        .logo-img {
            width: 36px;
            height: 36px;
            object-fit: contain;
            display: block;
        }
        .logo span {
            color: var(--accent);
            font-weight: 600;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 22px;
        }
        .nav-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.2s;
        }
        .nav-links a:hover {
            color: #fff;
        }
        .lang-tag {
            border: 1px solid var(--border);
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 12px;
            color: var(--accent) !important;
            transition: all 0.2s;
        }
        .lang-tag:hover {
            border-color: var(--accent);
            background: rgba(249, 115, 22, 0.08);
        }
        .btn-nav {
            background: var(--primary);
            color: #fff !important;
            padding: 8px 18px;
            border-radius: 8px;
            font-weight: 600;
            transition: background 0.2s;
        }
        .btn-nav:hover {
            background: var(--primary-hover);
        }

        /* 首屏 (Hero Section) */
        .hero {
            padding: 60px 0 40px;
            text-align: center;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(234, 88, 12, 0.12);
            border: 1px solid rgba(249, 115, 22, 0.25);
            color: var(--accent);
            padding: 5px 14px;
            border-radius: 9999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.8px;
            margin-bottom: 22px;
        }
        .badge-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent);
        }
        h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.22;
            margin-bottom: 18px;
            background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            max-width: 920px;
            margin-left: auto;
            margin-right: auto;
            letter-spacing: -0.5px;
        }
        .hero-desc {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 760px;
            margin: 0 auto 36px;
            line-height: 1.65;
        }

        /* 3次测试邀请码体验区 (Trial Box) */
        .trial-box {
            background: linear-gradient(135deg, rgba(234, 88, 12, 0.12) 0%, rgba(22, 19, 17, 0.95) 100%);
            border: 1px solid rgba(249, 115, 22, 0.35);
            border-radius: 16px;
            max-width: 860px;
            margin: 0 auto 24px;
            padding: 24px 28px;
            text-align: left;
            box-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.5);
            position: relative;
            overflow: hidden;
        }
        .trial-box::before {
            content: '';
            position: absolute;
            top: 0; right: 0; width: 220px; height: 100%;
            background: radial-gradient(circle at 100% 50%, rgba(249, 115, 22, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }
        .trial-header {
            margin-bottom: 16px;
        }
        .trial-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 11.5px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(249, 115, 22, 0.12);
            border: 1px solid rgba(249, 115, 22, 0.3);
            padding: 3px 10px;
            border-radius: 20px;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }
        .trial-header h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .trial-header p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .trial-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .trial-input-row {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .trial-input-wrap {
            flex: 1;
            min-width: 260px;
            position: relative;
            display: flex;
            align-items: center;
        }
        .trial-input-wrap svg {
            position: absolute;
            left: 14px;
            color: var(--accent);
        }
        .trial-input-wrap input {
            width: 100%;
            padding: 11px 14px 11px 42px;
            background: #090d16;
            border: 1px solid var(--border-light);
            border-radius: 10px;
            color: #fff;
            font-family: ui-monospace, SFMono-Regular, monospace;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.5px;
            outline: none;
            transition: all 0.2s;
        }
        .trial-input-wrap input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 12px rgba(249, 115, 22, 0.25);
        }
        .trial-btn {
            padding: 11px 20px;
            font-size: 13.5px;
            font-weight: 700;
            white-space: nowrap;
            cursor: pointer;
        }
        .trial-feedback {
            font-size: 12.5px;
            color: #cbd5e1;
            background: rgba(0,0,0,0.3);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: 8px;
            padding: 10px 14px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            flex-wrap: wrap;
        }
        .trial-feedback code {
            font-family: ui-monospace, monospace;
            color: var(--accent);
            background: rgba(249, 115, 22, 0.12);
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 700;
        }
        .trial-admin-link {
            font-size: 12px;
            color: var(--text-subtle);
            text-decoration: none;
            transition: color 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .trial-admin-link:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        /* 导航条登录按钮 */
        .btn-auth-nav {
            background: rgba(249, 115, 22, 0.1);
            border: 1px solid rgba(249, 115, 22, 0.35);
            color: #ffedd5;
            padding: 7px 15px;
            border-radius: 8px;
            font-size: 13.5px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 7px;
            cursor: pointer;
            transition: all 0.2s;
        }
        .btn-auth-nav:hover {
            background: rgba(249, 115, 22, 0.2);
            border-color: var(--accent);
            color: #fff;
            box-shadow: 0 0 12px rgba(249, 115, 22, 0.25);
        }
        .btn-auth-nav .auth-nav-role-badge {
            font-size: 11px;
            padding: 1px 6px;
            border-radius: 4px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
        }
        .btn-auth-nav .auth-nav-rem {
            color: var(--accent);
            font-weight: 700;
        }

        .trial-auth-btn {
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--border-light);
            color: var(--text-main);
            padding: 12px 18px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            white-space: nowrap;
        }
        .trial-auth-btn:hover {
            background: rgba(255,255,255,0.12);
            border-color: var(--accent);
            color: #fff;
        }
        .trial-quick-links {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* 统一认证与额度 Modal */
        .auth-modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background: rgba(4, 3, 2, 0.78);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            z-index: 99999;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 20px;
            opacity: 0;
            transition: opacity 0.25s ease;
        }
        .auth-modal-overlay.show {
            display: flex;
            opacity: 1;
        }
        .auth-modal-card {
            background: #14110e;
            border: 1px solid #3d3128;
            border-radius: 20px;
            box-shadow: 0 30px 70px rgba(0,0,0,0.85), 0 0 0 1px rgba(249,115,22,0.1);
            max-width: 640px;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            position: relative;
            padding: 32px;
            color: var(--text-main);
        }
        .auth-modal-close {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--border);
            color: var(--text-muted);
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            cursor: pointer;
            transition: all 0.2s;
            line-height: 1;
        }
        .auth-modal-close:hover {
            background: rgba(239,68,68,0.2);
            color: #ef4444;
            border-color: #ef4444;
        }
        .auth-modal-header {
            margin-bottom: 24px;
            text-align: left;
        }
        .auth-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 11px;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.8px;
            margin-bottom: 8px;
        }
        .auth-badge-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent);
        }
        .auth-modal-title {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.3px;
            margin-bottom: 6px;
        }
        .auth-modal-subtitle {
            font-size: 13.5px;
            color: var(--text-muted);
        }

        /* 角色 Tab 栏 (左右二栏：登录 与 注册/免费试用) */
        .auth-role-tabs {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 6px;
            background: rgba(0,0,0,0.35);
            padding: 5px;
            border-radius: 12px;
            border: 1px solid var(--border);
            margin-bottom: 22px;
        }
        .auth-role-tab {
            background: none;
            border: none;
            color: var(--text-muted);
            padding: 9px 8px;
            border-radius: 8px;
            font-size: 12.5px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }
        .auth-role-tab:hover {
            color: #fff;
            background: rgba(255,255,255,0.04);
        }
        .auth-role-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(234,88,12,0.3);
        }

        /* 表单样式 */
        .auth-form-group {
            margin-bottom: 16px;
            text-align: left;
        }
        .auth-form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: #cbd5e1;
            margin-bottom: 7px;
        }
        .auth-input-wrap input {
            width: 100%;
            background: rgba(0,0,0,0.3);
            border: 1px solid var(--border-light);
            border-radius: 10px;
            padding: 12px 14px;
            font-size: 14px;
            color: #fff;
            outline: none;
            transition: all 0.2s;
            box-sizing: border-box;
        }
        .auth-input-wrap input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.15);
        }
        .auth-quick-pills {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--text-subtle);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .auth-pill {
            background: rgba(249, 115, 22, 0.08);
            border: 1px solid rgba(249, 115, 22, 0.25);
            color: var(--accent);
            padding: 3px 10px;
            border-radius: 6px;
            font-size: 12px;
            cursor: pointer;
            transition: all 0.2s;
        }
        .auth-pill:hover {
            background: rgba(249, 115, 22, 0.18);
            border-color: var(--accent);
        }
        .auth-tip-box {
            background: rgba(249, 115, 22, 0.06);
            border: 1px solid rgba(249, 115, 22, 0.2);
            border-radius: 10px;
            padding: 12px 14px;
            font-size: 12.5px;
            color: #fed7aa;
            line-height: 1.5;
            margin-bottom: 18px;
            text-align: left;
        }
        .auth-error-msg {
            margin-top: 14px;
            padding: 10px 14px;
            background: rgba(239, 68, 68, 0.1);
            border: 1px solid rgba(239, 68, 68, 0.3);
            border-radius: 8px;
            color: #fca5a5;
            font-size: 13px;
            font-weight: 500;
            text-align: left;
        }
        .auth-submit-btn {
            width: 100%;
            padding: 12px;
            font-size: 14px;
            font-weight: 700;
            border-radius: 10px;
            cursor: pointer;
            margin-top: 4px;
        }

        /* 登录后 Dashboard 风格 */
        .dash-user-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 18px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 20px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .dash-user-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .dash-avatar {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(234,88,12,0.3), rgba(249,115,22,0.15));
            border: 1px solid rgba(249,115,22,0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
        }
        .dash-user-text h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .dash-role-badge {
            font-size: 11px;
            font-weight: 700;
            padding: 2px 7px;
            border-radius: 4px;
            background: var(--primary);
            color: #fff;
        }
        .dash-role-badge.agent { background: #2563eb; }
        .dash-role-badge.admin { background: #7c3aed; }
        .dash-user-text span {
            font-size: 12.5px;
            color: var(--text-muted);
        }
        .dash-top-actions {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .btn-dash-sm {
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--border);
            color: var(--text-muted);
            padding: 6px 12px;
            border-radius: 7px;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .btn-dash-sm:hover {
            background: rgba(255,255,255,0.12);
            color: #fff;
        }
        .btn-dash-logout:hover {
            background: rgba(239,68,68,0.15);
            border-color: #ef4444;
            color: #ef4444;
        }

        
        .dash-key-card {
            background: rgba(249, 115, 22, 0.06);
            border: 1px solid rgba(249, 115, 22, 0.35);
            border-radius: 14px;
            padding: 16px 18px;
            margin-bottom: 18px;
            text-align: left;
        }
        .dash-key-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 8px;
        }
        .dash-key-title {
            font-size: 13.5px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .dash-key-tag {
            font-size: 11px;
            font-weight: 700;
            color: #10b981;
            background: rgba(16, 185, 129, 0.12);
            padding: 2px 8px;
            border-radius: 12px;
            border: 1px solid rgba(16, 185, 129, 0.25);
        }
        .dash-key-input-row {
            display: flex;
            gap: 8px;
            margin-bottom: 8px;
        }
        .dash-key-input {
            flex: 1;
            background: #090705;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 8px 12px;
            color: #fed7aa;
            font-family: var(--font-mono);
            font-size: 12.5px;
        }
        .dash-key-tip {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .dash-invite-box {
            background: rgba(56, 189, 248, 0.06);
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: 14px;
            padding: 16px 18px;
            margin-bottom: 18px;
            text-align: left;
        }
        .dash-invite-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 8px;
        }
        .dash-invite-title {
            font-size: 13.5px;
            font-weight: 700;
            color: #bae6fd;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .dash-invite-badge {
            font-size: 11px;
            font-weight: 700;
            color: #38bdf8;
            background: rgba(56, 189, 248, 0.15);
            padding: 2px 8px;
            border-radius: 12px;
            border: 1px solid rgba(56, 189, 248, 0.3);
        }
        .dash-invite-row {
            display: flex;
            gap: 8px;
            margin-bottom: 8px;
            align-items: center;
            flex-wrap: wrap;
        }
        .dash-invite-code-pill {
            background: #090705;
            border: 1px dashed #38bdf8;
            border-radius: 8px;
            padding: 7px 16px;
            font-size: 15px;
            font-weight: 800;
            color: #38bdf8;
            letter-spacing: 1px;
            font-family: var(--font-mono);
        }
    
        /* 额度网格 */
        .quota-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 20px;
        }
        @media (max-width: 540px) {
            .quota-grid { grid-template-columns: repeat(2, 1fr); }
        }
        .quota-card {
            background: rgba(0,0,0,0.3);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 14px 16px;
            text-align: left;
        }
        .quota-card.highlight {
            border-color: rgba(249, 115, 22, 0.4);
            background: rgba(249, 115, 22, 0.05);
        }
        .quota-card-lbl {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 4px;
        }
        .quota-card-val {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
        }
        .quota-card-val.accent {
            color: var(--accent);
        }
        .quota-card-val.green {
            color: #10b981;
        }
        .quota-card-sub {
            font-size: 11px;
            color: var(--text-subtle);
            margin-top: 2px;
        }

        /* 进度条 */
        .dash-progress-wrap {
            margin-bottom: 20px;
            background: rgba(0,0,0,0.3);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 12px 16px;
        }
        .dash-prog-text {
            display: flex;
            justify-content: space-between;
            font-size: 12.5px;
            color: var(--text-muted);
            margin-bottom: 6px;
        }
        .dash-prog-bar {
            height: 7px;
            background: rgba(255,255,255,0.08);
            border-radius: 4px;
            overflow: hidden;
        }
        .dash-prog-fill {
            height: 100%;
            background: linear-gradient(90deg, #ea580c, #f97316);
            border-radius: 4px;
            transition: width 0.4s ease;
        }

        /* 代码导出盒子 */
        .dash-config-box {
            background: #090807;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 14px;
            margin-bottom: 18px;
            text-align: left;
        }
        .dash-config-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .dash-config-code {
            font-family: ui-monospace, monospace;
            font-size: 12.5px;
            color: #a7f3d0;
            background: rgba(0,0,0,0.4);
            padding: 8px 12px;
            border-radius: 6px;
            white-space: pre-wrap;
            word-break: break-all;
            display: block;
        }

        /* 日志/列表表格 */
        .dash-section-title {
            font-size: 13.5px;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            text-align: left;
        }
        .dash-table-wrap {
            max-height: 200px;
            overflow-y: auto;
            border: 1px solid var(--border);
            border-radius: 8px;
            background: rgba(0,0,0,0.25);
            margin-bottom: 16px;
        }
        .dash-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 12px;
            text-align: left;
        }
        .dash-table th {
            padding: 8px 12px;
            background: rgba(0,0,0,0.4);
            color: var(--text-subtle);
            font-weight: 600;
            position: sticky;
            top: 0;
            border-bottom: 1px solid var(--border);
        }
        .dash-table td {
            padding: 8px 12px;
            border-bottom: 1px solid rgba(255,255,255,0.04);
            color: #cbd5e1;
        }
        .dash-table tr:hover td {
            background: rgba(255,255,255,0.02);
        }

        /* 代理商快捷发码小组件 */
        .dash-issue-box {
            background: rgba(37,99,235,0.06);
            border: 1px solid rgba(37,99,235,0.25);
            border-radius: 12px;
            padding: 16px;
            margin-bottom: 18px;
            text-align: left;
        }
        .dash-issue-box h5 {
            font-size: 13.5px;
            font-weight: 700;
            color: #93c5fd;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .dash-issue-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .dash-issue-form input {
            flex: 1;
            min-width: 140px;
            background: rgba(0,0,0,0.4);
            border: 1px solid rgba(37,99,235,0.3);
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 13px;
            color: #fff;
            outline: none;
        }
        .dash-issue-form select {
            background: rgba(0,0,0,0.4);
            border: 1px solid rgba(37,99,235,0.3);
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 13px;
            color: #fff;
            outline: none;
        }
        .btn-issue-submit {
            background: #2563eb;
            color: #fff;
            border: none;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            white-space: nowrap;
        }
        .btn-issue-submit:hover {
            background: #1d4ed8;
        }

        /* 第一页直观标明安装方法 (Installation Showcase) */
        .install-showcase {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: 16px;
            max-width: 860px;
            margin: 0 auto 40px;
            text-align: left;
            box-shadow: 0 24px 48px -12px rgba(0,0,0,0.6);
            overflow: hidden;
        }
        .install-tabs {
            display: flex;
            align-items: center;
            border-bottom: 1px solid var(--border);
            background: rgba(0,0,0,0.25);
            padding: 0 16px;
        }
        .install-tab-btn {
            background: none;
            border: none;
            color: var(--text-muted);
            font-size: 13.5px;
            font-weight: 600;
            padding: 14px 18px;
            cursor: pointer;
            border-bottom: 2px solid transparent;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .install-tab-btn.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
            background: rgba(249, 115, 22, 0.05);
        }
        .install-tab-btn:hover:not(.active) {
            color: #fff;
        }
        .tab-badge {
            background: rgba(16, 185, 129, 0.15);
            color: var(--success);
            font-size: 10px;
            font-weight: 700;
            padding: 2px 6px;
            border-radius: 4px;
            letter-spacing: 0.4px;
        }
        .install-body {
            padding: 22px 24px;
        }
        .tab-panel {
            display: none;
        }
        .tab-panel.active {
            display: block;
        }
        .cmd-bar {
            display: flex;
            align-items: center;
            background: #080c14;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 12px 16px;
            gap: 12px;
            margin-bottom: 18px;
        }
        .cmd-prompt-symbol {
            color: var(--text-subtle);
            font-family: ui-monospace, SFMono-Regular, monospace;
            font-size: 14px;
            user-select: none;
        }
        .cmd-text {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 14px;
            color: #f97316;
            flex: 1;
            user-select: all;
            word-break: break-all;
        }
        .copy-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .copy-btn:hover { background: var(--primary-hover); }

        /* 3 步极速上手指南 */
        .install-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 18px;
            padding-top: 18px;
            border-top: 1px solid var(--border);
        }
        .step-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .step-num {
            font-size: 11px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .step-title {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
        }
        .step-desc {
            font-size: 12.5px;
            color: var(--text-muted);
            line-height: 1.45;
        }
        .install-trust-footer {
            margin-top: 16px;
            padding: 10px 14px;
            background: rgba(0,0,0,0.2);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-subtle);
        }
        .trust-items {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .trust-item {
            display: flex;
            align-items: center;
            gap: 5px;
            color: var(--text-muted);
        }

        /* 第一页核心优点网格 (Key Advantages, 少用 emoji) */
        .hero-advantages {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 18px;
            max-width: 1040px;
            margin: 0 auto;
            text-align: left;
        }
        .adv-card {
            background: var(--surface-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 20px 20px;
            transition: border-color 0.2s, transform 0.2s;
        }
        .adv-card:hover {
            border-color: var(--border-light);
            transform: translateY(-2px);
        }
        .adv-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        .adv-icon {
            width: 28px;
            height: 28px;
            border-radius: 6px;
            background: rgba(249, 115, 22, 0.1);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .adv-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
        }
        .adv-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.55;
        }

        /* 全流程三步获客流水线 (Waterfall Pipeline Hero) */
        .waterfall-hero {
            background: linear-gradient(135deg, rgba(234, 88, 12, 0.16) 0%, rgba(22, 19, 17, 0.98) 100%);
            border: 1px solid rgba(249, 115, 22, 0.4);
            border-radius: 18px;
            padding: 30px 28px;
            margin-bottom: 30px;
            box-shadow: 0 16px 40px -12px rgba(0, 0, 0, 0.6), 0 0 25px rgba(249, 115, 22, 0.1);
            position: relative;
            overflow: hidden;
        }
        .waterfall-hero::before {
            content: '';
            position: absolute;
            top: 0; right: 0; width: 280px; height: 100%;
            background: radial-gradient(circle at 100% 40%, rgba(249, 115, 22, 0.18) 0%, transparent 70%);
            pointer-events: none;
        }
        .waterfall-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .waterfall-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 11.5px;
            font-weight: 800;
            color: var(--accent);
            background: rgba(249, 115, 22, 0.14);
            border: 1px solid rgba(249, 115, 22, 0.4);
            padding: 4px 11px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .waterfall-title {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .waterfall-desc {
            font-size: 14px;
            color: var(--text-muted);
            max-width: 820px;
            line-height: 1.6;
            margin-bottom: 22px;
        }
        .waterfall-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            position: relative;
        }
        @media (max-width: 800px) {
            .waterfall-steps { grid-template-columns: 1fr; }
        }
        .wf-step-card {
            background: rgba(14, 11, 9, 0.75);
            border: 1px solid rgba(249, 115, 22, 0.25);
            border-radius: 12px;
            padding: 18px;
            position: relative;
            transition: all 0.2s;
        }
        .wf-step-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
        }
        .wf-step-num {
            display: inline-block;
            font-size: 11px;
            font-weight: 800;
            color: var(--accent);
            background: rgba(249, 115, 22, 0.12);
            padding: 2px 7px;
            border-radius: 4px;
            margin-bottom: 8px;
        }
        .wf-step-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .wf-step-desc {
            font-size: 12.5px;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .wf-step-tier {
            margin-top: 8px;
            font-size: 11.5px;
            color: var(--accent);
            font-weight: 600;
        }
        .wf-footer-bar {
            margin-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 16px;
            border-top: 1px solid rgba(249, 115, 22, 0.2);
            font-size: 13px;
        }

        /* 代码多行展示框 (JSON Code Box) */
        .json-code-box {
            background: #080c14;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 16px 20px;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 13px;
            color: #f8fafc;
            overflow-x: auto;
            position: relative;
            margin-bottom: 16px;
        }
        .json-code-box pre {
            margin: 0;
            white-space: pre;
            line-height: 1.55;
            color: #cbd5e1;
        }
        .json-code-box .copy-btn {
            position: absolute;
            top: 12px;
            right: 12px;
        }

        /* 桌面客户端快速指引卡片 */
        .desktop-guide-card {
            background: #0d111a;
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 16px;
        }
        .desktop-guide-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .desktop-guide-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.55;
            margin-bottom: 12px;
        }

        /* 获客引擎矩阵 */
        .features {
            padding: 60px 0 80px;
            border-top: 1px solid var(--border);
        }

        /* 极速安装区 (在先了解完是什么后再呈现) */
        .install-section {
            padding: 60px 0 80px;
            border-top: 1px solid var(--border);
        }
        .section-header {
            text-align: center;
            margin-bottom: 46px;
        }
        .section-tag {
            font-size: 12px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 10px;
            color: #fff;
            letter-spacing: -0.4px;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 640px;
            margin: 0 auto;
        }
        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 22px;
        }
        .card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 28px 26px;
            transition: transform 0.2s, border-color 0.2s;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-3px);
            border-color: rgba(249, 115, 22, 0.4);
        }
        .card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
        }
        .card-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(234, 88, 12, 0.15);
            border: 1px solid rgba(249, 115, 22, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
        }
        .card-tag {
            font-size: 11px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(249, 115, 22, 0.08);
            border: 1px solid rgba(249, 115, 22, 0.2);
            padding: 3px 8px;
            border-radius: 6px;
        }
        .card-title {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }
        .card-desc {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.55;
            margin-bottom: 16px;
            flex-grow: 1;
        }
        .card-bullets {
            list-style: none;
            font-size: 12.5px;
            color: #cbd5e1;
            margin-bottom: 18px;
        }
        .card-bullets li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 7px;
            line-height: 1.45;
        }
        .card-bullets li svg {
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--success);
        }
        .card-code {
            padding: 8px 12px;
            background: #090d16;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 12px;
            font-family: ui-monospace, SFMono-Regular, monospace;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .card-code code {
            color: var(--accent);
        }

        /* 方案深度对比区 */
        .comparison {
            padding: 60px 0 80px;
            border-top: 1px solid var(--border);
        }
        .table-wrap {
            overflow-x: auto;
            border: 1px solid var(--border);
            border-radius: 12px;
            background: var(--surface);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 13.5px;
            text-align: left;
        }
        thead tr {
            background: rgba(0,0,0,0.3);
        }
        th {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border);
            color: #fff;
            font-weight: 700;
        }
        th.col-focus {
            color: var(--accent);
            background: rgba(249, 115, 22, 0.05);
        }
        td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border);
            color: var(--text-main);
        }
        td.col-focus {
            background: rgba(249, 115, 22, 0.03);
            font-weight: 600;
        }
        td.cell-bad {
            color: #ef4444;
        }
        td.cell-good {
            color: var(--success);
        }

        /* 服务方案与国内透明定价 */
        .pricing {
            padding: 60px 0 90px;
            border-top: 1px solid var(--border);
        }
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
            gap: 24px;
            max-width: 1020px;
            margin: 0 auto;
        }
        .price-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 32px 26px;
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .price-card.featured {
            border-color: var(--accent);
            box-shadow: 0 0 35px var(--accent-glow);
            background: linear-gradient(180deg, rgba(234,88,12,0.06) 0%, rgba(22,19,17,1) 100%);
        }
        .featured-tag {
            position: absolute;
            top: -11px;
            right: 22px;
            background: var(--accent);
            color: #0b0f19;
            font-size: 10.5px;
            font-weight: 800;
            padding: 3px 10px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .price-title {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .price-val {
            font-size: 38px;
            font-weight: 800;
            margin-bottom: 14px;
            color: #fff;
        }
        .price-val span {
            font-size: 15px;
            font-weight: 400;
            color: var(--text-muted);
        }
        .price-desc {
            font-size: 13.5px;
            color: var(--text-muted);
            margin-bottom: 22px;
            line-height: 1.45;
        }
        .price-features {
            list-style: none;
            margin-bottom: 28px;
            flex: 1;
        }
        .price-features li {
            font-size: 13px;
            color: #cbd5e1;
            margin-bottom: 10px;
            padding-left: 22px;
            position: relative;
            line-height: 1.4;
        }
        .price-features li svg {
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--success);
        }
        .btn-subscribe {
            display: block;
            text-align: center;
            background: rgba(255,255,255,0.07);
            color: #fff;
            text-decoration: none;
            padding: 12px;
            border-radius: 9px;
            font-weight: 700;
            font-size: 14px;
            transition: all 0.2s;
            border: 1px solid var(--border);
        }
        .btn-subscribe:hover {
            background: rgba(255,255,255,0.14);
            border-color: var(--border-light);
        }
        .btn-subscribe.featured-btn {
            background: var(--primary);
            border-color: var(--primary);
        }
        .btn-subscribe.featured-btn:hover {
            background: var(--primary-hover);
        }
        .payment-methods {
            margin-top: 14px;
            font-size: 12px;
            color: var(--text-subtle);
            text-align: center;
        }

        /* 常见问题解答 FAQ */
        .faq {
            padding: 60px 0 90px;
            border-top: 1px solid var(--border);
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        details {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 16px 20px;
            cursor: pointer;
            transition: border-color 0.2s;
        }
        details[open] {
            border-color: var(--border-light);
        }
        summary {
            font-weight: 700;
            color: #fff;
            font-size: 15px;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        summary::-webkit-details-marker { display: none; }
        summary::after {
            content: "+";
            font-size: 18px;
            color: var(--text-muted);
            font-weight: 400;
            transition: transform 0.2s;
        }
        details[open] summary::after {
            content: "−";
        }
        details p {
            margin-top: 12px;
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 页脚 Footer */
        footer {
            padding: 36px 0;
            border-top: 1px solid var(--border);
            text-align: center;
            font-size: 13px;
            color: var(--text-subtle);
        }
        footer a { color: var(--accent); text-decoration: none; }
        footer a:hover { text-decoration: underline; }

        @media (max-width: 768px) {
            h1 { font-size: 30px; }
            .install-steps { grid-template-columns: 1fr; }
            .nav-links { gap: 12px; }
            .nav-links a:not(.btn-nav):not(.lang-tag) { display: none; }
        }

/* 通用按钮类定义 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    line-height: 1.4;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    border: 1px solid transparent;
}
.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 14px rgba(234, 88, 12, 0.4);
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--border-light);
}