*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f0f2f5;
            color: #1a1a2e;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #c0392b;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover,
        a:focus {
            color: #96281b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: #0d0d1a;
        }
        h1 {
            font-size: 2.2rem;
            margin: 0 0 0.75rem;
        }
        h2 {
            font-size: 1.6rem;
            margin: 2.5rem 0 1rem;
            border-bottom: 3px solid #c0392b;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.25rem;
            margin: 1.8rem 0 0.6rem;
            color: #2c3e50;
        }
        h4 {
            font-size: 1.05rem;
            margin: 1.2rem 0 0.4rem;
            color: #34495e;
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: 1120px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 0 40px rgba(0, 0, 0, 0.06);
            border-radius: 12px;
            overflow: hidden;
        }
        .header {
            background: linear-gradient(135deg, #0b0e1a 0%, #1a1f33 100%);
            color: #fff;
            padding: 1rem 2rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: 0.04em;
            color: #f5c518;
            text-transform: uppercase;
            background: linear-gradient(145deg, #f5c518, #d4a017);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            transition: opacity 0.25s;
        }
        .my-logo:hover {
            opacity: 0.82;
            text-decoration: none;
        }
        .my-logo i {
            -webkit-text-fill-color: #f5c518;
            font-size: 1.8rem;
        }
        .navbar {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .navbar a {
            color: #e0e0e0;
            padding: 0.45rem 0.9rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            white-space: nowrap;
        }
        .navbar a:hover,
        .navbar a:focus {
            background: rgba(245, 197, 24, 0.18);
            color: #f5c518;
            text-decoration: none;
        }
        .navbar a.active {
            background: #c0392b;
            color: #fff;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #f5c518;
            font-size: 1.7rem;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            transition: transform 0.2s;
        }
        .hamburger:active {
            transform: scale(0.92);
        }
        .breadcrumbs {
            background: #f8f6f0;
            padding: 0.6rem 2rem;
            font-size: 0.85rem;
            border-bottom: 1px solid #e6e0d4;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
        }
        .breadcrumbs a {
            color: #7f8c8d;
        }
        .breadcrumbs a:hover {
            color: #c0392b;
        }
        .breadcrumbs span {
            color: #2c3e50;
        }
        .breadcrumbs .sep {
            color: #b0b0b0;
        }
        .main-content {
            padding: 2rem 2rem 3rem;
        }
        .feature-img {
            border-radius: 14px;
            margin: 1.8rem 0 2rem;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.10);
            width: 100%;
            max-width: 820px;
            height: auto;
        }
        section {
            margin-bottom: 2.8rem;
        }
        .tip-box {
            background: #fef9e7;
            border-left: 5px solid #f5c518;
            padding: 1.2rem 1.6rem;
            border-radius: 8px;
            margin: 1.4rem 0;
        }
        .tip-box strong {
            color: #b8860b;
        }
        .info-box {
            background: #eaf2f8;
            border-left: 5px solid #2980b9;
            padding: 1.2rem 1.6rem;
            border-radius: 8px;
            margin: 1.4rem 0;
        }
        .quote-box {
            background: #f9f0eb;
            border-left: 5px solid #c0392b;
            padding: 1.2rem 1.6rem;
            border-radius: 8px;
            margin: 1.4rem 0;
            font-style: italic;
        }
        .link-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.2rem;
            margin: 1rem 0 1.4rem;
            padding: 0.8rem 1rem;
            background: #f9f9fc;
            border-radius: 10px;
            border: 1px solid #e5e7eb;
        }
        .link-group a {
            font-weight: 500;
        }
        .search-section {
            background: #f4f1ea;
            border-radius: 14px;
            padding: 1.6rem 2rem;
            margin: 2rem 0 2.5rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1rem;
        }
        .search-section label {
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.05rem;
        }
        .search-form {
            display: flex;
            flex: 1 1 300px;
            gap: 0.5rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.7rem 1rem;
            border: 2px solid #d5ccc0;
            border-radius: 40px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            background: #fff;
        }
        .search-form input:focus {
            border-color: #c0392b;
        }
        .search-form button {
            background: #c0392b;
            color: #fff;
            border: none;
            border-radius: 40px;
            padding: 0.7rem 1.6rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-form button:hover {
            background: #96281b;
        }
        .search-form button:active {
            transform: scale(0.96);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2rem 0 1rem;
        }
        .feedback-card {
            background: #fafafa;
            border: 1px solid #e8e8e8;
            border-radius: 16px;
            padding: 1.6rem 1.8rem;
        }
        .feedback-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: #1a1a2e;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.9rem;
            margin-top: 0.6rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.65rem 1rem;
            border: 2px solid #ddd;
            border-radius: 10px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            font-family: inherit;
            background: #fff;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #c0392b;
        }
        .feedback-card textarea {
            min-height: 90px;
            resize: vertical;
        }
        .feedback-card .btn-submit {
            background: #c0392b;
            color: #fff;
            border: none;
            padding: 0.7rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            align-self: flex-start;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .feedback-card .btn-submit:hover {
            background: #96281b;
        }
        .feedback-card .btn-submit:active {
            transform: scale(0.96);
        }
        .star-select {
            display: flex;
            gap: 0.3rem;
            font-size: 1.6rem;
            color: #f5c518;
            cursor: pointer;
        }
        .star-select i {
            transition: transform 0.15s;
        }
        .star-select i:hover {
            transform: scale(1.2);
        }
        .footer {
            background: #0b0e1a;
            color: #c8c8d0;
            padding: 2rem 2rem 1.5rem;
            border-top: 3px solid #f5c518;
        }
        .footer-inner {
            max-width: 1120px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 1.5rem;
        }
        .footer-col {
            flex: 1 1 180px;
        }
        .footer-col h4 {
            color: #f5c518;
            margin-bottom: 0.6rem;
            font-size: 1.05rem;
            border: none;
        }
        .footer-col a {
            display: block;
            color: #b0b0c0;
            padding: 0.2rem 0;
            font-size: 0.9rem;
        }
        .footer-col a:hover {
            color: #f5c518;
        }
        .footer .copyright {
            text-align: center;
            width: 100%;
            margin-top: 1.8rem;
            padding-top: 1.2rem;
            border-top: 1px solid #2a2a40;
            font-size: 0.85rem;
            color: #8888a0;
        }
        friend-link {
            display: block;
            margin-top: 0.4rem;
        }
        friend-link a {
            display: inline;
            padding: 0;
            color: #b0b0c0;
        }
        friend-link a:hover {
            color: #f5c518;
        }
        @media (max-width: 820px) {
            .header {
                padding: 0.8rem 1.2rem;
            }
            .main-content {
                padding: 1.5rem 1.2rem 2rem;
            }
            .breadcrumbs {
                padding: 0.5rem 1.2rem;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .search-section {
                flex-direction: column;
                align-items: stretch;
                padding: 1.2rem 1.4rem;
            }
            .search-form {
                flex: 1 1 auto;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            h3 {
                font-size: 1.1rem;
            }
            .footer {
                padding: 1.5rem 1.2rem 1rem;
            }
            .footer-inner {
                flex-direction: column;
                gap: 1rem;
            }
            .navbar {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #141a2e;
                padding: 1rem 0.5rem;
                border-radius: 0 0 12px 12px;
                gap: 0.3rem;
                margin-top: 0.6rem;
            }
            .navbar.show {
                display: flex;
            }
            .navbar a {
                padding: 0.6rem 1rem;
                width: 100%;
                text-align: center;
            }
            .hamburger {
                display: block;
            }
            .header {
                flex-wrap: wrap;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 0.4rem;
            }
            .container {
                border-radius: 6px;
            }
            .header {
                padding: 0.6rem 0.8rem;
            }
            .main-content {
                padding: 1rem 0.8rem 1.5rem;
            }
            .breadcrumbs {
                padding: 0.4rem 0.8rem;
                font-size: 0.75rem;
            }
            .search-form input {
                font-size: 0.85rem;
            }
            .feedback-card {
                padding: 1.2rem;
            }
            h1 {
                font-size: 1.4rem;
            }
            h2 {
                font-size: 1.15rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo i {
                font-size: 1.3rem;
            }
        }
        .schema-hidden {
            display: none;
        }
        .anchor-offset {
            scroll-margin-top: 80px;
        }
        .last-updated {
            display: inline-block;
            background: #eef0f5;
            padding: 0.2rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            color: #555;
            margin-bottom: 1.2rem;
        }
        .badge-free {
            background: #27ae60;
            color: #fff;
            padding: 0.1rem 0.7rem;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            display: inline-block;
            margin-left: 0.3rem;
        }