* {margin: 0;padding: 0;box-sizing: border-box;}
        :root {
            --orange-50: #fff7ed;
            --orange-100: #ffedd5;
            --orange-200: #fed7aa;
            --orange-400: #fb923c;
            --orange-500: #f97316;
            --orange-600: #ea580c;
            --orange-700: #c2410c;
            --orange-800: #9a3412;
            --orange-gradient: linear-gradient(120deg, var(--orange-400), var(--orange-500));
            --orange-gradient-light: linear-gradient(120deg, var(--orange-100), var(--orange-50));
            --gray-50: #f9fafb;
            --gray-100: #f3f4f6;
            --gray-200: #e5e7eb;
            --gray-700: #374151;
            --gray-800: #1f2937;
            --white: #ffffff;
            --shadow-sm: 0 2px 4px rgba(249, 115, 22, 0.05);
            --shadow-md: 0 4px 12px rgba(249, 115, 22, 0.1);
            --shadow-lg: 0 8px 24px rgba(249, 115, 22, 0.15);
            --radius-xs: 4px;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-full: 9999px;
            --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
            --border-light: 1px solid var(--orange-100);
            --border-main: 1px solid var(--orange-400);
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: var(--orange-50);
            color: var(--gray-800);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            line-height: 1.8;
            background-image: radial-gradient(var(--orange-100) 1px, transparent 1px);
            background-size: 20px 20px;
        }
        header {
            background-color: var(--white);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(8px);
            background-color: rgba(255, 255, 255, 0.9);
        }
        .container {
            width: 92%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 8px;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 0;
        }
        .logo {
            font-size: 26px;
            font-weight: 800;
            background: var(--orange-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-fill-color: transparent;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }
        .logo-icon {
            font-size: 30px;
            background: var(--orange-gradient);
            width: 40px;
            height: 40px;
            border-radius: var(--radius-full);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
        }
        .menu-icon {
            font-size: 28px;
            color: var(--orange-500);
            display: block;
            cursor: pointer;
            transition: var(--transition);
            padding: 4px 8px;
            border-radius: var(--radius-xs);
        }
        .menu-icon:hover {
            color: var(--orange-700);
            background-color: var(--orange-100);
        }
        .nav {
            display: none;
        }
        @media (min-width: 768px) {
            .nav {
                display: block;
            }
            .menu-icon {
                display: none;
            }
        }
        .nav ul {
            display: flex;
            gap: 40px;
            list-style: none;
        }
        .nav a {
            text-decoration: none;
            color: var(--gray-700);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            padding: 8px 12px;
            border-radius: var(--radius-xs);
            position: relative;
        }
        .nav a:hover {
            color: var(--orange-600);
            background-color: var(--orange-50);
        }
        .nav .active {
            color: var(--orange-600);
            background-color: var(--orange-50);
        }
        main {
            flex: 1;
            padding: 40px 0;
        }
        .breadcrumbs {
            font-size: 14px;
            color: var(--gray-700);
            margin-bottom: 24px;
            padding: 8px 12px;
            background-color: var(--white);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
        }
        .breadcrumbs a {
            color: var(--orange-500);
            text-decoration: none;
            font-weight: 600;
        }
        .breadcrumbs a:hover {
            text-decoration: none;
        }
        .section {
            background-color: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 36px;
            margin-bottom: 36px;
            transition: var(--transition);
            border: var(--border-light);
            position: relative;
            overflow: hidden;
        }
        .section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--orange-gradient);
        }
        .section:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--orange-400);
        }
        .section h2 {
            font-size: 30px;
            font-weight: 800;
            background: var(--orange-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-fill-color: transparent;
            margin-bottom: 28px;
            position: relative;
            padding-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 3px;
            background: var(--orange-gradient);
            border-radius: var(--radius-full);
        }
        .section h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--orange-700);
            margin: 24px 0 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .section h3::before {
            content: '';
            width: 4px;
            height: 20px;
            background: var(--orange-gradient);
            border-radius: var(--radius-full);
        }
        .section h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--orange-500);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .section h4::before {
            content: '●';
            color: var(--orange-400);
            font-size: 12px;
        }
        @media (min-width: 768px) {
            .section h2 {
                font-size: 36px;
            }
            .section h3 {
                font-size: 24px;
            }
            .section {
                padding: 48px;
            }
        }
        /* 修复IP卡片样式：缩小内边距、降低背景饱和度、减小字体 */
        .ip-card {
            background: var(--orange-gradient-light);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            margin-bottom: 20px;
            color: var(--orange-800);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            border: 1px solid var(--orange-200);
        }
        .ip-card::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 60px;
            height: 60px;
            background: rgba(255, 255, 255, 0.3);
            border-radius: 0 0 0 var(--radius-lg);
        }
        .ip-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .ip-card p {
            font-size: 16px;
            margin-bottom: 6px;
            font-weight: 500;
            color: var(--orange-700);
        }
        .ip-value {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.5px;
            word-break: break-all;
        }
        @media (min-width: 768px) {
            .ip-card p {
                font-size: 17px;
            }
            .ip-value {
                font-size: 22px;
            }
        }
        .btn {
            background: var(--orange-gradient);
            color: var(--white);
            border: none;
            border-radius: var(--radius-sm);
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            margin: 8px 0;
            letter-spacing: 0.5px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            filter: brightness(1.05);
        }
        .btn:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
            filter: brightness(0.95);
        }
        .text-content {
            font-size: 16px;
            margin-bottom: 20px;
            text-align: justify;
            color: var(--gray-700);
            line-height: 1.9;
        }
        .highlight {
            color: var(--orange-700);
            font-weight: 700;
            background-color: var(--orange-50);
            padding: 2px 6px;
            border-radius: var(--radius-xs);
        }
        .tool-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
            margin-top: 30px;
        }
        @media (min-width: 768px) {
            .tool-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        .tool-card {
            background: var(--orange-gradient-light);
            border-radius: var(--radius-md);
            padding: 30px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: var(--border-light);
            position: relative;
            overflow: hidden;
        }
        .tool-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--orange-gradient);
        }
        .tool-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--orange-400);
        }
        .tool-card h3 {
            font-size: 20px;
            color: var(--orange-700);
            margin-bottom: 20px;
            text-align: center;
            font-weight: 700;
            padding-bottom: 12px;
            border-bottom: var(--border-light);
        }
        .tool-card input {
            width: 100%;
            padding: 14px 18px;
            border: var(--border-main);
            border-radius: var(--radius-sm);
            font-size: 16px;
            margin-bottom: 20px;
            transition: var(--transition);
            background-color: var(--white);
            color: var(--gray-800);
        }
        .tool-card input:focus {
            outline: none;
            border-color: var(--orange-500);
            box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.1);
        }
        .result-text {
            font-size: 18px;
            color: var(--orange-700);
            font-weight: 700;
            margin-top: 20px;
            min-height: 32px;
            text-align: center;
            padding: 8px;
            border-radius: var(--radius-xs);
            background-color: var(--orange-50);
        }
        .faq-item {
            margin-bottom: 24px;
            border-bottom: var(--border-light);
            padding-bottom: 20px;
            transition: var(--transition);
        }
        .faq-item:hover {
            background-color: var(--orange-50);
            padding: 12px;
            margin: 0 -12px 24px -12px;
            border-radius: var(--radius-sm);
        }
        .footer {
            background: var(--white);
            padding: 40px 0 20px;
            text-align: center;
            color: var(--gray-700);
            border-top: 3px solid var(--orange-500);
            margin-top: 40px;
            box-shadow: 0 -2px 8px var(--shadow-sm);
        }
        .footer p {
            margin-bottom: 12px;
            font-size: 15px;
        }
        .footer p:last-child {
            font-size: 13px;
            color: var(--gray-500);
            margin-bottom: 0;
            padding-top: 12px;
            border-top: var(--border-light);
        }