* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a3a5c;
            --primary-dark: #0f2440;
            --accent: #e8b830;
            --accent-dark: #c99e20;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --text-dark: #1a1a2e;
            --text-mid: #2d3a4a;
            --text-light: #6c7a8a;
            --border-light: #e0e4e8;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: var(--accent-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: var(--bg-white);
            border-bottom: 2px solid var(--accent);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--primary);
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            -webkit-text-fill-color: var(--accent);
            font-size: 1.8rem;
        }
        .my-logo:hover {
            opacity: 0.85;
        }
        nav {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        nav a {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-mid);
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: 0.2s;
        }
        nav a:hover {
            color: var(--primary);
            border-bottom-color: var(--accent);
        }
        .hamburger {
            display: none;
            font-size: 1.6rem;
            background: none;
            border: none;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: var(--bg-light);
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb {
            background: var(--bg-white);
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb ol {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb ol li+li:before {
            content: "›";
            margin-right: 12px;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--text-mid);
        }
        .breadcrumb a:hover {
            color: var(--accent-dark);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #2a5a7a 100%);
            color: #fff;
            padding: 60px 0 50px;
            margin-bottom: 40px;
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: "🏆";
            position: absolute;
            right: 5%;
            top: 20%;
            font-size: 12rem;
            opacity: 0.08;
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .hero h1 span {
            color: var(--accent);
        }
        .hero p {
            font-size: 1.15rem;
            max-width: 720px;
            opacity: 0.92;
            margin-bottom: 24px;
            line-height: 1.8;
        }
        .hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 30px;
            font-size: 0.95rem;
            opacity: 0.85;
        }
        .hero .meta i {
            margin-right: 6px;
            color: var(--accent);
        }
        .hero .updated-badge {
            display: inline-block;
            background: rgba(232, 184, 48, 0.2);
            padding: 4px 14px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid rgba(232, 184, 48, 0.3);
        }
        main {
            padding-bottom: 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content-main {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 40px;
            box-shadow: var(--shadow-sm);
        }
        .content-main h2 {
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--primary);
            margin: 48px 0 16px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--accent);
            line-height: 1.3;
        }
        .content-main h2:first-of-type {
            margin-top: 0;
        }
        .content-main h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-mid);
            margin: 32px 0 12px;
            line-height: 1.4;
        }
        .content-main h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 24px 0 8px;
            line-height: 1.5;
        }
        .content-main p {
            margin-bottom: 18px;
            color: var(--text-mid);
            font-size: 1.05rem;
        }
        .content-main ul,
        .content-main ol {
            margin: 16px 0 24px 24px;
            color: var(--text-mid);
        }
        .content-main li {
            margin-bottom: 8px;
            font-size: 1.05rem;
        }
        .content-main .highlight-box {
            background: #f0f5fb;
            border-left: 4px solid var(--accent);
            padding: 20px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
        }
        .content-main .highlight-box strong {
            color: var(--primary);
        }
        .content-main .emoji-lg {
            font-size: 1.4em;
            margin-right: 4px;
        }
        .featured-image {
            margin: 32px 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .featured-image img {
            width: 100%;
            object-fit: cover;
            max-height: 500px;
        }
        .featured-image figcaption {
            padding: 12px 16px;
            background: var(--bg-light);
            font-size: 0.9rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--accent);
        }
        .sidebar-card ul {
            list-style: none;
        }
        .sidebar-card ul li {
            margin-bottom: 10px;
            padding: 6px 0;
            border-bottom: 1px dashed var(--border-light);
        }
        .sidebar-card ul li a {
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card ul li a i {
            color: var(--accent);
            font-size: 0.85rem;
            width: 18px;
            text-align: center;
        }
        .sidebar-card ul li a:hover {
            color: var(--accent-dark);
        }
        .interaction-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 2px solid var(--border-light);
        }
        .interaction-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .interaction-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .interaction-card h3 i {
            color: var(--accent);
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .interaction-card input,
        .interaction-card textarea,
        .interaction-card select {
            padding: 12px 16px;
            border: 1.5px solid var(--border-light);
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-family: var(--font-main);
            transition: border 0.2s;
            background: var(--bg-light);
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus,
        .interaction-card select:focus {
            outline: none;
            border-color: var(--accent);
            background: var(--bg-white);
        }
        .interaction-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .interaction-card .btn {
            padding: 12px 24px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            justify-content: center;
        }
        .interaction-card .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }
        .interaction-card .btn i {
            font-size: 0.9rem;
        }
        .rating-stars {
            display: flex;
            gap: 6px;
            font-size: 1.6rem;
            color: #ddd;
            cursor: pointer;
            direction: rtl;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            transition: color 0.2s;
            cursor: pointer;
        }
        .rating-stars label:hover,
        .rating-stars label:hover~label,
        .rating-stars input:checked~label {
            color: var(--accent);
        }
        footer {
            background: var(--primary-dark);
            color: #e0e8f0;
            padding: 48px 0 24px;
            border-top: 4px solid var(--accent);
        }
        footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        footer h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 16px;
        }
        footer p,
        footer a {
            font-size: 0.95rem;
            color: #c0d0e0;
            line-height: 1.8;
        }
        footer a:hover {
            color: var(--accent);
        }
        friend-link {
            display: block;
        }
        friend-link a {
            display: block;
            padding: 6px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .copyright {
            grid-column: 1 / -1;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 20px;
            text-align: center;
            font-size: 0.9rem;
            color: #90a0b0;
        }
        .copyright strong {
            color: var(--accent);
        }
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            footer .container {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .content-main {
                padding: 24px 18px;
            }
            .content-main h2 {
                font-size: 1.5rem;
            }
            .content-main h3 {
                font-size: 1.2rem;
            }
            .interaction-section {
                grid-template-columns: 1fr;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            footer .container {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .hamburger {
                display: block;
            }
            nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 20px 24px;
                gap: 12px;
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                opacity: 0;
                transition: 0.3s ease;
                pointer-events: none;
                border-bottom: 3px solid var(--accent);
                z-index: 99;
            }
            #nav-toggle:checked~nav {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            nav a {
                font-size: 1.1rem;
                padding: 10px 0;
                border-bottom: 1px solid var(--border-light);
                width: 100%;
            }
            .hero {
                padding: 40px 0 32px;
            }
            .hero .meta {
                flex-direction: column;
                gap: 8px;
            }
            .breadcrumb ol {
                font-size: 0.8rem;
                gap: 4px 8px;
            }
            .breadcrumb ol li+li:before {
                margin-right: 8px;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .my-logo {
                font-size: 1.2rem;
            }
            .my-logo i {
                font-size: 1.3rem;
            }
            .content-main {
                padding: 16px 12px;
            }
            .content-main p {
                font-size: 0.98rem;
            }
            .interaction-card {
                padding: 20px 16px;
            }
        }
        .text-accent {
            color: var(--accent);
        }
        .fw-700 {
            font-weight: 700;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-8 {
            margin-bottom: 8px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex {
            display: flex;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .align-center {
            align-items: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }