*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f7f4f0;
            color: #1e1e1e;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #c0392b;
            text-decoration: underline;
            transition: color 0.2s;
        }
        a:hover {
            color: #922b21;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 0.8rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.6rem 1.2rem;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(255, 255, 255, 0.08);
            padding: 0.3rem 1rem 0.3rem 0.8rem;
            border-radius: 40px;
            transition: background 0.3s;
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
        }
        .my-logo i {
            color: #f1c40f;
            font-size: 1.6rem;
        }
        .my-logo span {
            font-weight: 300;
            color: #f1c40f;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #eaeaea;
            text-decoration: none;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.25s;
            position: relative;
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #f1c40f;
        }
        .main-nav a.active {
            background: rgba(241, 196, 15, 0.18);
            color: #f1c40f;
        }
        .breadcrumb {
            background: #f0ebe5;
            padding: 0.6rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd6ce;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.8rem;
            color: #8a7e72;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #7f6b5d;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .current {
            color: #3a2e24;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(145deg, #2d1f14 0%, #4a2c1a 100%);
            color: #fff;
            padding: 3rem 0 2.8rem;
            margin-bottom: 2rem;
            border-radius: 0 0 60px 60px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 0.8rem;
            letter-spacing: -0.5px;
        }
        .hero h1 i {
            color: #f1c40f;
            margin-right: 0.4rem;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 780px;
            opacity: 0.9;
            margin-bottom: 1.2rem;
        }
        .hero .meta {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
            font-size: 0.95rem;
            color: #e0d3c8;
        }
        .hero .meta i {
            margin-right: 0.4rem;
            color: #f1c40f;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0 3rem;
        }
        .content-main h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 2.8rem 0 1rem 0;
            color: #1a1a2e;
            border-bottom: 4px solid #f1c40f;
            padding-bottom: 0.4rem;
            display: inline-block;
        }
        .content-main h2 i {
            color: #c0392b;
            margin-right: 0.5rem;
        }
        .content-main h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 2rem 0 0.8rem 0;
            color: #2c1f14;
        }
        .content-main h3 i {
            margin-right: 0.5rem;
            color: #c0392b;
        }
        .content-main h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.5rem 0 0.5rem 0;
            color: #3a2e24;
        }
        .content-main p {
            margin-bottom: 1rem;
            font-size: 1.05rem;
            color: #2a2a2a;
        }
        .content-main .highlight-box {
            background: #fdf8f3;
            border-left: 5px solid #f1c40f;
            padding: 1.2rem 1.8rem;
            border-radius: 0 16px 16px 0;
            margin: 1.5rem 0;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
        }
        .content-main .code-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 1rem;
            margin: 1.2rem 0;
        }
        .content-main .code-card {
            background: #fff;
            border-radius: 16px;
            padding: 1rem 1.4rem;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
            border: 1px solid #ebe3db;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .content-main .code-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
        }
        .content-main .code-card .label {
            font-weight: 700;
            color: #c0392b;
        }
        .content-main .code-card .code {
            font-family: monospace;
            background: #1a1a2e;
            color: #f1c40f;
            padding: 0.2rem 0.8rem;
            border-radius: 6px;
            font-size: 1.1rem;
            display: inline-block;
            margin-top: 0.3rem;
        }
        .content-main .code-card .status {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            background: #27ae60;
            color: #fff;
            margin-left: 0.6rem;
        }
        .content-main .code-card .status.expired {
            background: #c0392b;
        }
        .content-main blockquote {
            background: #f0ebe5;
            border-radius: 16px;
            padding: 1.5rem 2rem;
            margin: 1.8rem 0;
            font-style: italic;
            position: relative;
            border-left: 6px solid #c0392b;
        }
        .content-main blockquote::before {
            content: "\201C";
            font-size: 3rem;
            color: #c0392b;
            position: absolute;
            top: -0.2rem;
            left: 0.8rem;
            font-family: serif;
            opacity: 0.3;
        }
        .content-main blockquote cite {
            display: block;
            margin-top: 0.6rem;
            font-style: normal;
            font-weight: 600;
            color: #5a4a3a;
        }
        .content-main .feature-img {
            border-radius: 20px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            margin: 1.8rem 0;
            width: 100%;
            max-width: 800px;
        }
        .content-main .tip-list {
            list-style: none;
            padding: 0;
        }
        .content-main .tip-list li {
            background: #fff;
            padding: 1rem 1.4rem 1rem 3rem;
            border-radius: 12px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            margin-bottom: 0.8rem;
            position: relative;
            border-left: 4px solid #f1c40f;
        }
        .content-main .tip-list li::before {
            content: "\f0eb";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 1rem;
            top: 1rem;
            color: #f1c40f;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar .widget {
            background: #fff;
            border-radius: 20px;
            padding: 1.5rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            margin-bottom: 1.8rem;
            border: 1px solid #ebe3db;
        }
        .sidebar .widget h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #1a1a2e;
            border-bottom: 2px solid #f1c40f;
            padding-bottom: 0.4rem;
        }
        .sidebar .widget ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar .widget ul li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #f0ebe5;
        }
        .sidebar .widget ul li a {
            text-decoration: none;
            color: #3a2e24;
            font-weight: 500;
            transition: color 0.2s;
            display: block;
        }
        .sidebar .widget ul li a:hover {
            color: #c0392b;
        }
        .search-form {
            display: flex;
            gap: 0.4rem;
            margin: 0.4rem 0;
        }
        .search-form input {
            flex: 1;
            padding: 0.7rem 1rem;
            border: 2px solid #ddd6ce;
            border-radius: 40px;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s;
            background: #faf8f6;
        }
        .search-form input:focus {
            border-color: #c0392b;
        }
        .search-form button {
            background: #c0392b;
            border: none;
            color: #fff;
            padding: 0.7rem 1.4rem;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #922b21;
        }
        .feedback-area {
            background: #fff;
            border-radius: 24px;
            padding: 2rem;
            margin: 2.5rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #ebe3db;
        }
        .feedback-area h2 {
            margin-top: 0 !important;
            border-bottom: none !important;
            display: block !important;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin-top: 1.5rem;
        }
        .feedback-item label {
            font-weight: 600;
            display: block;
            margin-bottom: 0.4rem;
            color: #1a1a2e;
        }
        .feedback-item input,
        .feedback-item textarea,
        .feedback-item select {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 2px solid #ddd6ce;
            border-radius: 12px;
            font-size: 1rem;
            background: #faf8f6;
            transition: border 0.3s;
            outline: none;
        }
        .feedback-item input:focus,
        .feedback-item textarea:focus,
        .feedback-item select:focus {
            border-color: #c0392b;
        }
        .feedback-item textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-item .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            direction: rtl;
        }
        .feedback-item .star-rating input {
            display: none;
        }
        .feedback-item .star-rating label {
            font-size: 2rem;
            color: #ddd;
            transition: color 0.2s;
            cursor: pointer;
            margin: 0;
        }
        .feedback-item .star-rating label:hover,
        .feedback-item .star-rating label:hover~label,
        .feedback-item .star-rating input:checked~label {
            color: #f1c40f;
        }
        .feedback-item .btn {
            background: #c0392b;
            border: none;
            color: #fff;
            padding: 0.8rem 2rem;
            border-radius: 40px;
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
        }
        .feedback-item .btn:hover {
            background: #922b21;
        }
        .site-footer {
            background: #1a1a2e;
            color: #eaeaea;
            padding: 2.5rem 0 1.5rem;
            margin-top: 3rem;
            border-radius: 60px 60px 0 0;
        }
        .site-footer .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2rem;
        }
        .site-footer h4 {
            color: #f1c40f;
            font-size: 1.1rem;
            margin-bottom: 0.8rem;
        }
        .site-footer a {
            color: #d0c8bc;
            text-decoration: none;
        }
        .site-footer a:hover {
            color: #f1c40f;
        }
        .site-footer friend-link {
            display: block;
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.95rem;
        }
        .site-footer friend-link a {
            display: inline-block;
            margin-right: 1.2rem;
            margin-bottom: 0.4rem;
        }
        .site-footer .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1.2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.9rem;
            color: #a09888;
        }
        .site-footer .copyright i {
            color: #c0392b;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: rgba(26, 26, 46, 0.98);
                border-radius: 16px;
                padding: 0.8rem 0.4rem;
                margin-top: 0.6rem;
                gap: 0.1rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.7rem 1.2rem;
                width: 100%;
                border-radius: 10px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .content-main h2 {
                font-size: 1.6rem;
            }
            .content-main h3 {
                font-size: 1.3rem;
            }
            .content-main .code-list {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-inner {
                grid-template-columns: 1fr;
            }
            .feedback-area {
                padding: 1.2rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            .breadcrumb ol {
                gap: 0.2rem 0.6rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.8rem;
            }
            .my-logo {
                font-size: 1.4rem;
                padding: 0.2rem 0.8rem 0.2rem 0.6rem;
            }
            .hero {
                padding: 2rem 0 1.8rem;
                border-radius: 0 0 30px 30px;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .content-main p {
                font-size: 0.95rem;
            }
            .feedback-item .star-rating {
                font-size: 1.4rem;
            }
            .feedback-item .star-rating label {
                font-size: 1.6rem;
            }
        }