* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: #fefcf5;
            color: #1e2a3a;
            line-height: 1.7;
            font-size: 16px;
            scroll-behavior: smooth;
        }
        a {
            color: #c75000;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #9e3d00;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1e2a3a 0%, #2c3e50 100%);
            color: #fff;
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            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;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #ff8c42, #ffd166);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            transition: transform 0.3s;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.7rem;
            -webkit-text-fill-color: #aaa;
            color: #aaa;
            display: block;
            font-weight: 400;
            letter-spacing: 1px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 4px 8px;
            transition: opacity 0.2s;
        }
        .hamburger:hover {
            opacity: 0.8;
        }
        nav {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }
        nav a {
            color: #eee;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.92rem;
            font-weight: 500;
            transition: background 0.25s, color 0.25s;
        }
        nav a:hover {
            background: rgba(255, 140, 66, 0.25);
            color: #ffd166;
            text-decoration: none;
        }
        nav a.active {
            background: #ff8c42;
            color: #1e2a3a;
        }
        .breadcrumb {
            padding: 12px 0 6px;
            font-size: 0.85rem;
            color: #8899aa;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            background: transparent;
        }
        .breadcrumb a {
            color: #ff8c42;
        }
        .breadcrumb span {
            color: #ccd;
        }
        .hero {
            background: linear-gradient(135deg, #1e2a3a 0%, #2c3e50 100%);
            color: #fff;
            padding: 40px 0 30px;
            margin-bottom: 30px;
            border-bottom: 4px solid #ff8c42;
        }
        .hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 12px;
            background: linear-gradient(135deg, #ffd166, #ff8c42);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.1rem;
            max-width: 800px;
            opacity: 0.9;
            color: #e0e8f0;
        }
        .hero .meta {
            margin-top: 16px;
            font-size: 0.9rem;
            color: #aabbcc;
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        .hero .meta i {
            color: #ff8c42;
            margin-right: 6px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            margin: 30px 0;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        article h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 40px 0 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid #ff8c42;
            color: #1e2a3a;
        }
        article h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 30px 0 12px;
            color: #2c3e50;
        }
        article h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 24px 0 10px;
            color: #3d5060;
        }
        article p {
            margin-bottom: 18px;
            color: #2a3a4a;
        }
        article ul,
        article ol {
            margin: 12px 0 20px 24px;
        }
        article li {
            margin-bottom: 8px;
        }
        .highlight-box {
            background: #fff6ed;
            border-left: 5px solid #ff8c42;
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .highlight-box strong {
            color: #c75000;
        }
        .feature-img {
            margin: 28px 0;
            border-radius: 14px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
        }
        .feature-img figcaption {
            text-align: center;
            font-size: 0.9rem;
            color: #667;
            margin-top: 8px;
            font-style: italic;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .stat-card {
            background: #fff;
            border-radius: 14px;
            padding: 20px 16px;
            text-align: center;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            border: 1px solid #f0e8e0;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.1);
        }
        .stat-card .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ff8c42;
        }
        .stat-card .label {
            font-size: 0.95rem;
            color: #556;
            margin-top: 4px;
        }
        .pro-tip {
            background: #e8f5e9;
            border-left: 5px solid #2e7d32;
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 20px 0;
        }
        .pro-tip i {
            color: #2e7d32;
            margin-right: 8px;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 24px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
        }
        th,
        td {
            padding: 14px 18px;
            text-align: left;
            border-bottom: 1px solid #f0ece8;
        }
        th {
            background: #1e2a3a;
            color: #fff;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        tr:hover td {
            background: #faf5f0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px 20px;
            margin-bottom: 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #f0ece8;
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            margin-bottom: 14px;
            color: #1e2a3a;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-card li {
            margin-bottom: 10px;
        }
        .sidebar-card li a {
            display: block;
            padding: 8px 12px;
            border-radius: 8px;
            background: #f8f6f2;
            transition: background 0.2s, padding-left 0.2s;
            font-size: 0.95rem;
        }
        .sidebar-card li a:hover {
            background: #ffede0;
            padding-left: 18px;
            text-decoration: none;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin-bottom: 6px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid #e0d8d0;
            border-radius: 30px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.3s;
            background: #f8f6f2;
        }
        .search-form input:focus {
            border-color: #ff8c42;
        }
        .search-form button {
            background: #ff8c42;
            color: #fff;
            border: none;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background 0.25s, transform 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .search-form button:hover {
            background: #c75000;
            transform: scale(1.04);
        }
        .feedback-section {
            background: #fff;
            border-radius: 16px;
            padding: 28px 24px;
            margin: 40px 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid #f0ece8;
        }
        .feedback-section h2 {
            margin-top: 0;
            border-bottom: none;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 16px;
        }
        @media (max-width: 700px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-form label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            color: #2c3e50;
        }
        .feedback-form input,
        .feedback-form textarea,
        .feedback-form select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e0d8d0;
            border-radius: 10px;
            font-size: 0.95rem;
            margin-bottom: 14px;
            background: #f8f6f2;
            transition: border 0.3s;
            outline: none;
            font-family: inherit;
        }
        .feedback-form input:focus,
        .feedback-form textarea:focus,
        .feedback-form select:focus {
            border-color: #ff8c42;
        }
        .feedback-form textarea {
            resize: vertical;
            min-height: 90px;
        }
        .feedback-form .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            margin-bottom: 14px;
            cursor: pointer;
            color: #ddd;
        }
        .feedback-form .star-rating i {
            transition: color 0.2s, transform 0.2s;
        }
        .feedback-form .star-rating i:hover,
        .feedback-form .star-rating i.active {
            color: #ffb800;
            transform: scale(1.1);
        }
        .btn {
            background: #ff8c42;
            color: #fff;
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: #c75000;
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: #2c3e50;
        }
        .btn-secondary:hover {
            background: #1e2a3a;
        }
        friend-link {
            display: block;
            padding: 20px 0;
            border-top: 2px solid #f0ece8;
            margin-top: 40px;
        }
        friend-link h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            color: #1e2a3a;
        }
        friend-link .friend-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
        }
        friend-link .friend-list a {
            color: #c75000;
            font-weight: 500;
            padding: 4px 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s;
        }
        friend-link .friend-list a:hover {
            border-bottom-color: #ff8c42;
            text-decoration: none;
        }
        footer {
            background: #1e2a3a;
            color: #ccd8e4;
            padding: 32px 0 20px;
            margin-top: 40px;
            border-top: 4px solid #ff8c42;
        }
        footer .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 20px;
        }
        footer .copyright {
            font-size: 0.9rem;
            opacity: 0.8;
            width: 100%;
            text-align: center;
            padding-top: 16px;
            border-top: 1px solid #334455;
            margin-top: 16px;
        }
        footer a {
            color: #ffd166;
        }
        footer a:hover {
            color: #ff8c42;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 6px;
                padding: 12px 0 0;
            }
            nav.open {
                display: flex;
            }
            nav a {
                padding: 10px 16px;
                border-radius: 8px;
                width: 100%;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            article h2 {
                font-size: 1.6rem;
            }
            article h3 {
                font-size: 1.3rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .sidebar {
                position: static;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 12px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .feedback-grid {
                grid-template-columns: 1fr;
            }
            .header-inner {
                gap: 8px;
            }
        }
        .text-accent {
            color: #ff8c42;
        }
        .text-small {
            font-size: 0.9rem;
            color: #667;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .gap-8 {
            gap: 8px;
        }
        .tag {
            display: inline-block;
            background: #ffede0;
            color: #c75000;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }