*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --accent: #f9a826;
            --accent-dark: #e08f10;
            --bg: #faf9f6;
            --card-bg: #ffffff;
            --text: #1e2a3a;
            --text-light: #5a6a7a;
            --border: #dce4ec;
            --success: #2ecc71;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --radius: 12px;
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: var(--primary);
            color: #fff;
            padding: 0 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .my-logo span {
            color: var(--accent);
        }
        .my-logo i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .nav-menu {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #eef4ff;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background 0.2s, color 0.2s;
            text-decoration: none;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
        }
        .nav-menu a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .breadcrumb-wrap {
            background: #f0f3f8;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            font-size: 0.85rem;
            color: var(--text-light);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin: 0 8px 0 4px;
            color: #aab;
        }
        .breadcrumb a {
            color: var(--primary-light);
        }
        .breadcrumb .current {
            color: var(--text-light);
            font-weight: 500;
        }
        .main-wrap {
            padding: 30px 0 50px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            align-items: start;
        }
        @media(max-width:900px) {
            .main-grid {
                grid-template-columns: 1fr;
            }
        }
        .content-area h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 10px;
            letter-spacing: -0.5px;
        }
        .content-area h1 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .meta-line {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 24px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 16px;
        }
        .meta-line i {
            margin-right: 5px;
        }
        .last-updated {
            font-weight: 600;
            color: var(--primary);
        }
        .content-area h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 40px;
            margin-bottom: 14px;
            line-height: 1.3;
            border-left: 4px solid var(--accent);
            padding-left: 16px;
        }
        .content-area h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--primary-light);
            margin-top: 28px;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .content-area h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-top: 20px;
            margin-bottom: 8px;
        }
        .content-area p {
            margin-bottom: 16px;
            font-size: 1rem;
            color: #2d3a4a;
        }
        .content-area ul,
        .content-area ol {
            margin: 12px 0 20px 24px;
        }
        .content-area li {
            margin-bottom: 8px;
        }
        .content-area .highlight-box {
            background: #f0f7ff;
            border-left: 4px solid var(--accent);
            padding: 18px 22px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 20px 0;
        }
        .content-area .highlight-box i {
            color: var(--accent);
            margin-right: 8px;
        }
        .content-area .tip-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 20px 24px;
            box-shadow: var(--shadow);
            margin: 20px 0;
            border: 1px solid var(--border);
        }
        .content-area .tip-card h4 {
            margin-top: 0;
            color: var(--primary);
        }
        .feature-img-wrap {
            margin: 28px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: #eef3f8;
        }
        .feature-img-wrap img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .feature-img-wrap figcaption {
            padding: 10px 16px;
            font-size: 0.85rem;
            color: var(--text-light);
            background: #fff;
            border-top: 1px solid var(--border);
        }
        .sidebar {
            position: sticky;
            top: 90px;
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin-bottom: 24px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
        }
        .sidebar-link-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-link-list li {
            padding: 6px 0;
            border-bottom: 1px solid #f0f2f5;
        }
        .sidebar-link-list li:last-child {
            border-bottom: none;
        }
        .sidebar-link-list a {
            color: var(--text);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color 0.2s;
        }
        .sidebar-link-list a:hover {
            color: var(--accent);
        }
        .sidebar-link-list a i {
            color: var(--accent);
            font-size: 0.7rem;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin-bottom: 4px;
        }
        .search-form input {
            flex: 1;
            padding: 10px 14px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.9rem;
            outline: none;
            transition: border 0.2s;
            font-family: var(--font);
        }
        .search-form input:focus {
            border-color: var(--accent);
        }
        .search-form button {
            background: var(--accent);
            border: none;
            color: #fff;
            padding: 10px 18px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.2s;
        }
        .search-form button:hover {
            background: var(--accent-dark);
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 20px;
        }
        @media(max-width:600px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 22px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .feedback-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .feedback-card h3 i {
            color: var(--accent);
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 10px 14px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.9rem;
            font-family: var(--font);
            outline: none;
            transition: border 0.2s;
            background: #fff;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: var(--accent);
        }
        .feedback-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .feedback-card .btn-submit {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 0.95rem;
        }
        .feedback-card .btn-submit:hover {
            background: var(--primary-light);
        }
        .star-rating {
            display: flex;
            gap: 4px;
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            cursor: pointer;
            color: #ddd;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: var(--accent);
        }
        friend-link {
            display: block;
            padding: 30px 0 10px;
            border-top: 2px solid var(--border);
            margin-top: 30px;
        }
        friend-link h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .friend-links-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .friend-links-grid a {
            background: #f0f3f8;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--text);
            transition: background 0.2s, color 0.2s;
            text-decoration: none;
            border: 1px solid var(--border);
        }
        .friend-links-grid a:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .site-footer {
            background: var(--primary);
            color: #ccd9ee;
            padding: 30px 0 20px;
            margin-top: 40px;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 30px;
        }
        @media(max-width:700px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .footer-inner h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 10px;
        }
        .footer-inner p,
        .footer-inner a {
            font-size: 0.85rem;
            color: #b0c4dd;
        }
        .footer-inner a:hover {
            color: var(--accent);
        }
        .footer-inner .copyright {
            grid-column: 1 / -1;
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.8rem;
            color: #8aa0c0;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            padding: 3px 0;
        }
        .footer-links a {
            text-decoration: none;
        }
        @media(max-width:768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 12px 0 6px;
                gap: 2px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 10px 14px;
                border-radius: 6px;
                width: 100%;
            }
            .header-inner {
                padding: 10px 16px;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .content-area h1 {
                font-size: 1.7rem;
            }
            .content-area h2 {
                font-size: 1.3rem;
            }
            .content-area h3 {
                font-size: 1.1rem;
            }
            .main-wrap {
                padding: 20px 0;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
        }
        .text-accent {
            color: var(--accent);
        }
        .fw-bold {
            font-weight: 700;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-10 {
            margin-bottom: 10px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex {
            display: flex;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .align-center {
            align-items: center;
        }
        .feature-img-wrap img {
            transition: filter 0.3s;
            background: #e8edf3;
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--accent);
            color: #fff;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
            cursor: pointer;
            border: none;
            transition: transform 0.2s, background 0.2s;
            z-index: 50;
        }
        .scroll-top:hover {
            transform: translateY(-3px);
            background: var(--accent-dark);
        }
        @media(max-width:600px) {
            .scroll-top {
                bottom: 16px;
                right: 16px;
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
        }