:root {
        --primary-color: #E2231A;
        --secondary-color: #171717;
        --accent-color: #00A2FF;
        --bg-light: #f5f7fa;
        --bg-white: #ffffff;
        --text-color: #2d3436;
        --border-radius: 16px;
        --font-main: 'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
    }
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    body {
        font-family: var(--font-main);
        background-color: var(--bg-light);
        color: var(--text-color);
        line-height: 1.75;
        overflow-x: hidden;
        scroll-behavior: smooth;
    }
    img, svg {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a { 
        text-decoration: none;
        color: var(--primary-color);
        transition: color 0.2s ease;
    }
    a:hover { color: var(--secondary-color); }
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }
    .site-header {
        background: var(--bg-white);
        box-shadow: 0 2px 12px rgba(0,0,0,0.08);
        position: sticky;
        top: 0;
        z-index: 999;
    }
    .navbar {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        padding: 12px 20px;
        max-width: 1200px;
        margin: 0 auto;
    }
    .my-logo {
        display: flex;
        align-items: center;
        font-weight: 800;
        font-size: 1.7rem;
        letter-spacing: -1px;
        color: var(--primary-colored, #171717);
    }
    .my-logo i {
        font-size: 2.2rem;
        color: var(--primary-color);
        margin-right: 4px;
        transform: rotate(-10deg);
    }
    .my-logo span {
        background: var(--primary-color);
        color: #fff;
        padding: 2px 8px;
        border-radius: 8px;
        margin-left: 4px;
    }
    .nav-links {
        display: flex;
        gap: 1.5rem;
        list-style: none;
        align-items: center;
    }
    .nav-links a {
        font-weight: 600;
        font-size: 0.9rem;
        padding: 8px 0;
        border-bottom: 2px solid transparent;
        transition: all 0.2s;
    }
    .nav-links a:hover {
        border-bottom-color: var(--primary-color);
        color: var(--primary-color);
    }
    .hamburger {
        display: none;
        background: transparent;
        border: none;
        font-size: 2rem;
        cursor: pointer;
        color: var(--secondary-color);
    }
    @media (max-width: 768px) {
        .nav-links {
            display: none;
            width: 100%;
            flex-direction: column;
            background: var(--bg-white);
            padding: 1rem 0;
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            border-radius: 12px;
        }
        .nav-links.open { display: flex; }
        .hamburger { display: block; }
    }
    .breadcrumb {
        padding: 14px 0;
        font-size: 0.9rem;
        background: transparent;
        max-width: 1200px;
        margin: auto;
        width: 100%;
    }
    .breadcrumb ol {
        list-style: none;
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        padding-left: 20px;
    }
    .breadcrumb li+li::before {
        content: "›";
        margin-right: 10px;
        color: #888;
    }
    .update-label {
        font-size: 0.85rem;
        color: #555;
        margin-bottom: 20px;
        background: #eef4fd;
        padding: 4px 14px;
        border-radius: 30px;
        display: inline-block;
    }
    .update-label i {
        margin-right: 6px;
        color: var(--accent-color);
    }
    h1 {
        font-size: clamp(2.2rem, 5vw, 3.4rem);
        font-weight: 800;
        line-height: 1.2;
        margin: 0.8em 0 0.5em;
        letter-spacing: -1.5px;
        color: var(--secondary-color);
    }
    h1 span {
        color: var(--primary-color);
    }
    h2 {
        font-size: 2.2rem;
        font-weight: 700;
        margin: 1.6em 0 0.8em;
        letter-spacing: -1px;
        position: relative;
        padding-left: 1rem;
        border-left: 6px solid var(--primary-color);
    }
    h3 {
        font-size: 1.5rem;
        font-weight: 700;
        margin: 1.4em 0 0.6em;
        color: #1f1f1f;
    }
    h4 {
        font-weight: 600;
        font-size: 1.1rem;
        margin: 1em 0 0.2em;
    }
    p {
        margin-bottom: 1.25em;
        font-size: 1.05rem;
    }
    .text-muted { color: #666; }
    .mt-4 { margin-top: 2rem; }
    .mb-3 { margin-bottom: 1.5rem; }
    .grid-2 {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 24px;
    }
    .flex-between {
        display: flex;
        justify-content: space-between;
        gap: 16px;
        flex-wrap: wrap;
        align-items: center;
    }
    .card {
        background: var(--bg-white);
        border-radius: var(--border-radius);
        padding: 1.5rem 1.8rem;
        box-shadow: 0 4px 18px rgba(0,0,0,0.04);
        transition: transform 0.2s, box-shadow 0.25s;
        border: 1px solid rgba(0,0,0,0.03);
    }
    .card:hover {
        transform: translateY(-6px);
        box-shadow: 0 15px 25px rgba(0,0,0,0.07);
    }
    .callout {
        background: linear-gradient(110deg, #eff7ff, #fff7e6);
        padding: 1.5rem 2rem;
        border-radius: 18px;
        border-left: 5px solid var(--accent-color);
        margin: 2.2rem 0;
    }
    .stat-box {
        background: var(--secondary-color);
        color: #fff;
        border-radius: 22px;
        padding: 2rem 1.8rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
    }
    .stat-box i {
        font-size: 2.5rem;
        color: var(--accent-color);
        margin-bottom: 8px;
    }
    .stat-box h4 { color: #fff; font-size: 2rem; }
    .stat-box p { opacity: 0.8; font-size: 0.9rem; }
    table {
        width: 100%;
        border-collapse: collapse;
        background: var(--bg-white);
        border-radius: 10px;
        overflow: hidden;
    }
    th, td {
        padding: 12px 16px;
        text-align: left;
        border-bottom: 1px solid #dddddd;
    }
    th { background: #0f0f0f; color: #fff; font-weight: 600; }
    tr:hover { background-color: #f0f8ff; }
    .faq-details {
        background: var(--bg-white);
        border-radius: 14px;
        padding: 0 1.8rem;
        margin-bottom: 18px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.02);
        overflow: hidden;
    }
    .faq-details summary {
        cursor: pointer;
        font-weight: 600;
        list-style: none;
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1.2rem 0;
    }
    .faq-details summary::-webkit-details-marker { display: none; }
    .faq-details summary i { color: var(--primary-color); transition: 0.2s; }
    .faq-details[open] summary i {
        transform: rotate(180deg);
    }
    .faq-details .content {
        padding-bottom: 1.2rem;
        border-top: 1px solid #eadbdb;
    }
    .btn {
        display: inline-block;
        background: var(--primary-color);
        color: #fff;
        padding: 0.9rem 2rem;
        border: none;
        border-radius: 50px;
        font-weight: 600;
        cursor: pointer;
        transition: background 0.2s, transform 0.1s;
        box-shadow: 0 4px 8px rgba(226, 35, 26, 0.24);
        font-size: 1rem;
    }
    .btn:hover {
        background: #b81c13;
        transform: scale(1.02);
    }
    .btn-outline {
        background: transparent;
        border: 2px solid var(--primary-color);
        color: var(--primary-color);
        box-shadow: none;
    }
    .btn-outline:hover { background: var(--primary-color); color: #fff; }
    .form-control {
        display: block;
        width: 100%;
        padding: 14px 18px;
        font-size: 1rem;
        border-radius: 40px;
        border: 1px solid #ccc;
        background: #fff;
        transition: 0.2s;
    }
    .form-control:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 0 4px rgba(0,162,255,0.1); }
    .site-footer {
        background: #111;
        color: #fff;
        padding: 3rem 1rem 1rem;
        margin-top: 4rem;
        border-radius: 40px 40px 0 0;
    }
    .site-footer a { color: #bbb; }
    .site-footer a:hover { color: #fff; }
    friend-link {
        display: flex;
        flex-wrap: wrap;
        gap: 1.5rem;
        justify-content: center;
        margin: 1rem 0 0.8rem;
        font-size: 0.95rem;
    }
    friend-link a {
        padding: 0.5rem 1rem;
        background: #222;
        border-radius: 30px;
    }
    friend-link a:hover { background: var(--primary-color); color: #fff; }
    .rating-stars {
        display: flex;
        gap: 8px;
        cursor: pointer;
        font-size: 2.5rem;
        color: #d0d0d0;
    }
    .rating-stars .fa-solid.selected {
        color: #f6c84c;
    }
    .comments-block {
        max-height: 200px;
        overflow-y: auto;
        border: 1px solid #eee;
        border-radius: 8px;
        padding: 1rem;
        background: #fdfaf6;
    }
    .hero-figure {
        background: linear-gradient(145deg, #1a4b78, #1d70b7, #5ea9f0);
        border-radius: 24px;
        padding: 2rem 1rem;
        margin: 2rem 0;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
        color: #fff;
    }
    .hero-figure svg {
        width: 220px;
    }
    figcaption {
        background: rgba(0,0,0,0.4);
        padding: 0.5rem 1.5rem;
        border-radius: 40px;
        margin-top: 1rem;
        font-size: 0.95rem;
        font-weight: 500;
    }
    @media (max-width: 768px) {
        body { font-size: 0.95rem; }
        .navbar { padding: 10px 16px; }
        .container { padding: 0 16px; }
        h2 { font-size: 1.8rem; }
        .card { padding: 1.2rem; }
    }
    .seo-highlight {
        background: linear-gradient(120deg, #ffefef 0%, #ffe8e8 100%);
        border-radius: 6px;
        padding: 0 0.2rem;
        font-weight: 600;
        color: #a52a2a;
    }
    .list-check li {
        list-style: none;
        margin-bottom: 10px;
    }
    .list-check li i {
        margin-right: 12px;
        color: var(--primary-color);
    }
    .inline-icon {
        color: var(--primary-color);
    }
    .brand-underline {
        background-image: linear-gradient(120deg, #f5b 0%, #f5b 50%);
        background-repeat: no-repeat;
        background-size: 100% 0.3em;
        background-position: 0 88%;
    }
    .link-list {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(220px,1fr));
        gap: 12px;
        margin: 1.8rem 0;
    }    
    .link-list a{
        background: #eee;
        border-radius: 25px;
        padding: 10px 17px;
        text-align: center;
        font-weight: 600;
        font-size: 0.85rem;
        transition: all 0.15s;
    }
    .link-list a:hover{
        background: var(--secondary-color);
        color: white;
    }