* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: #f4f7fb;
            color: #1e293b;
            line-height: 1.7;
            font-size: 1.05rem;
            padding: 0 1rem;
        }
        a {
            color: #0f3b5e;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #d32f2f;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.05);
            border-radius: 24px;
            padding: 1.5rem 2rem 2rem;
        }
        @media (max-width: 640px) {
            .container {
                padding: 1rem 1rem 1.5rem;
                border-radius: 16px;
            }
            body {
                padding: 0 0.5rem;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 0 0.8rem;
            border-bottom: 2px solid #e9edf2;
            position: relative;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #0f3b5e, #d32f2f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
        }
        .my-logo small {
            font-size: 0.9rem;
            font-weight: 400;
            -webkit-text-fill-color: #4a5b6e;
            color: #4a5b6e;
            margin-left: 0.3rem;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
            background: inherit;
            -webkit-text-fill-color: inherit;
        }
        .my-logo a:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .nav-toggle {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #0f3b5e;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #e9edf2;
        }
        .nav-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            align-items: center;
            list-style: none;
        }
        .nav-menu li a {
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.4rem 0.2rem;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s;
        }
        .nav-menu li a:hover {
            border-bottom-color: #d32f2f;
            text-decoration: none;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0.6rem;
                padding: 1rem 0 0.5rem;
                border-top: 1px solid #e9edf2;
                margin-top: 0.8rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li a {
                display: block;
                padding: 0.6rem 0.8rem;
                background: #f8fafc;
                border-radius: 10px;
            }
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            font-size: 0.85rem;
            color: #5b6f82;
            padding: 0.9rem 0 0.3rem;
            list-style: none;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.8rem;
            color: #9aa9b9;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #0f3b5e;
        }
        .search-box {
            display: flex;
            max-width: 480px;
            margin: 1.8rem 0 1.2rem;
            border-radius: 60px;
            overflow: hidden;
            border: 1px solid #dce2ea;
            background: #fafbfc;
            transition: box-shadow 0.2s;
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 3px rgba(15, 59, 94, 0.15);
            border-color: #0f3b5e;
        }
        .search-box input {
            flex: 1;
            padding: 0.85rem 1.4rem;
            border: none;
            background: transparent;
            font-size: 1rem;
            outline: none;
            font-family: inherit;
        }
        .search-box button {
            background: #0f3b5e;
            color: #fff;
            border: none;
            padding: 0 1.6rem;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.2s;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .search-box button:hover {
            background: #d32f2f;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 1.2rem 0 0.6rem;
            color: #0f3b5e;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 2.4rem 0 0.8rem;
            color: #1a3a4f;
            border-left: 6px solid #d32f2f;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 1.8rem 0 0.5rem;
            color: #1e4a62;
        }
        h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.2rem 0 0.3rem;
            color: #2a5772;
        }
        p {
            margin: 0.8rem 0 1.2rem;
            color: #2d3f51;
        }
        .content-area {
            margin: 1.2rem 0 2rem;
        }
        .highlight {
            background: #fef3e7;
            padding: 0.2rem 0.4rem;
            border-radius: 6px;
            font-weight: 600;
        }
        .emoji-lg {
            font-size: 1.3rem;
            margin-right: 0.3rem;
        }
        .feature-img {
            margin: 2rem 0 1.5rem;
            border-radius: 16px;
            overflow: hidden;
        }
        .feature-img figcaption {
            font-size: 0.85rem;
            color: #6a7e93;
            text-align: center;
            padding: 0.6rem 0 0;
            font-style: italic;
        }
        .link-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 0.8rem 1.2rem;
            margin: 1.8rem 0;
            padding: 1.2rem 1.5rem;
            background: #f8fafc;
            border-radius: 16px;
            border: 1px solid #e9edf2;
        }
        .link-grid a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 500;
            padding: 0.3rem 0;
        }
        .link-grid a i {
            color: #d32f2f;
            width: 1.2rem;
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 2.5rem 0 1.5rem;
            padding: 2rem 0;
            border-top: 2px solid #e9edf2;
        }
        @media (max-width: 700px) {
            .feedback-section {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
        }
        .feedback-card {
            background: #f8fafc;
            border-radius: 18px;
            padding: 1.5rem 1.8rem;
            border: 1px solid #e9edf2;
        }
        .feedback-card h3 {
            margin-top: 0;
            font-size: 1.3rem;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 0.9rem;
            margin-top: 0.8rem;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 0.8rem 1rem;
            border: 1px solid #dce2ea;
            border-radius: 12px;
            font-size: 1rem;
            font-family: inherit;
            background: #fff;
            transition: border 0.2s;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: #0f3b5e;
            outline: none;
            box-shadow: 0 0 0 3px rgba(15, 59, 94, 0.1);
        }
        .feedback-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .feedback-card .btn {
            background: #0f3b5e;
            color: #fff;
            border: none;
            padding: 0.85rem 1.8rem;
            border-radius: 60px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            align-self: flex-start;
        }
        .feedback-card .btn:hover {
            background: #d32f2f;
            transform: scale(1.01);
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #dce2ea;
            cursor: pointer;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            transition: color 0.2s;
            color: #dce2ea;
        }
        .star-rating input:checked~label,
        .star-rating label:hover,
        .star-rating label:hover~label {
            color: #f5b342;
        }
        .site-footer {
            margin-top: 2.5rem;
            padding: 1.8rem 0 1.2rem;
            border-top: 2px solid #e9edf2;
            font-size: 0.95rem;
            color: #4a5b6e;
        }
        .site-footer friend-link {
            display: block;
            margin: 0.8rem 0 0.4rem;
            font-weight: 600;
        }
        .site-footer .friend-links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2rem;
            margin: 0.4rem 0 1.2rem;
        }
        .site-footer .friend-links-list a {
            color: #0f3b5e;
            font-weight: 500;
        }
        .site-footer .copyright {
            font-size: 0.85rem;
            color: #6a7e93;
            margin-top: 0.8rem;
            border-top: 1px solid #e9edf2;
            padding-top: 1rem;
        }
        .last-updated {
            display: inline-block;
            font-size: 0.85rem;
            color: #6a7e93;
            background: #f0f4f9;
            padding: 0.3rem 1rem;
            border-radius: 60px;
            margin: 0.4rem 0 1rem;
        }
        .text-muted {
            color: #5b6f82;
        }
        .mt-1 {
            margin-top: 0.5rem;
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo small {
                font-size: 0.7rem;
            }
            .link-grid {
                grid-template-columns: 1fr;
                padding: 1rem;
            }
            .feedback-card {
                padding: 1.2rem;
            }
        }