:root {
    --primary-color: #1a2a3a;
    --accent-color: #e67e22;
    --bg-light: #f4f7f9;
    --sidebar-width: 260px;
    --border-color: #e0e0e0;
    --table-header: #f1f4f7;
    --body-text: #333;
    --sidebar-text: #bdc3c7;
    --sidebar-title: #fff;
    --sidebar-muted: #d9e3ec;
    --content-bg: #fff;
    --panel-bg: #fff;
    --panel-alt-bg: #f8f9fa;
    --panel-hover-bg: #fafafa;
    --heading-color: #2c3e50;
    --muted-text: #7f8c8d;
    --caption-text: #7f8c8d;
    --table-text: #2c3e50;
    --shadow-soft: 0 2px 10px rgba(0, 0, 0, 0.02);
    --shadow-panel: -5px 0 15px rgba(0, 0, 0, 0.05);
    --shadow-strong: 0 8px 20px rgba(0, 0, 0, 0.08);
    --image-border: #eee;
}

body {
    font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--body-text);
    margin: 0;
    display: flex;
    background-color: var(--bg-light);
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--primary-color);
    color: var(--sidebar-title);
    height: 100vh;
    position: fixed;
    padding: 30px 20px;
    box-sizing: border-box;
    overflow-y: auto;
    z-index: 1000;
}

.sidebar h2 {
    font-size: 1.1rem;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
    margin-bottom: 20px;
    color: #fff;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar li {
    margin: 15px 0;
}

.sidebar a {
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: 0.3s;
    display: block;
}

.sidebar a:hover {
    color: #3498db;
    transform: translateX(5px);
}

.sidebar .back-link {
    display: inline-block;
    margin-bottom: 22px;
    color: var(--sidebar-muted);
    text-decoration: none;
    font-size: 0.92rem;
}

.sidebar .sub-menu {
    margin-left: 15px;
    border-left: 1px solid #444;
    padding-left: 10px;
}

.toc,
.toc ul {
    list-style: none;
    margin: 0;
    padding-left: 0;
    counter-reset: item;
}

.toc ul {
    padding-left: 18px;
    margin-top: 8px;
}

.toc li {
    counter-increment: item;
}

.toc li > a::before {
    content: counters(item, ".") ". ";
    color: #8fbce6;
    font-weight: 700;
}

.toc > li > a {
    font-weight: 600;
}

.toc ul li {
    margin: 10px 0;
}

.toc ul a {
    font-size: 0.85rem;
    color: var(--sidebar-muted);
}

.content {
    margin-left: var(--sidebar-width);
    padding: 60px;
    width: calc(100% - var(--sidebar-width));
    max-width: 1200px;
    background: var(--content-bg);
    min-height: 100vh;
    box-sizing: border-box;
    box-shadow: var(--shadow-panel);
}

.header-box {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 4px solid var(--primary-color);
    margin-bottom: 50px;
    padding-bottom: 30px;
    gap: 40px;
}

.header-text {
    flex: 1;
    min-width: 0;
}

.header-visual-group {
    flex: 0 0 280px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 20px;
}

.header-logo {
    width: 100%;
    max-width: 150px;
    height: auto;
    mix-blend-mode: multiply;
}

.header-camera-main {
    width: 100%;
    max-width: 260px;
    height: auto;
    mix-blend-mode: multiply;
    display: block;
}

.category-label {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1rem;
    text-transform: uppercase;
    margin: 0 0 10px 0;
    letter-spacing: 1.5px;
}

.model-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin: 0;
    line-height: 1.1;
}

.model-subtitle {
    font-size: 1.3rem;
    color: var(--muted-text);
    margin: 15px 0 0 0;
}

h2 {
    font-size: 1.8rem;
    color: var(--primary-color);
    border-left: 6px solid var(--accent-color);
    padding-left: 15px;
    margin-top: 70px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

h3 {
    font-size: 1.3rem;
    color: var(--heading-color);
    margin-top: 40px;
    background: var(--panel-alt-bg);
    padding: 12px 18px;
    border-radius: 6px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px;
    margin: 30px 0;
}

.feature-item {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    padding: 25px;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-strong);
    border-color: var(--accent-color);
}

.feature-item strong {
    display: block;
    color: var(--primary-color);
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.feature-list {
    padding-left: 20px;
    margin: 15px 0;
}

.feature-list li {
    margin-bottom: 8px;
}

.table-container {
    overflow-x: auto;
    margin: 20px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 500px;
}

th,
td {
    border: 1px solid var(--border-color);
    padding: 12px 15px;
    text-align: left;
}

th {
    background-color: var(--table-header);
    color: var(--table-text);
    font-weight: 600;
    white-space: nowrap;
}

tr:hover {
    background-color: var(--panel-hover-bg);
}

.text-center {
    text-align: center;
}

.interface-card {
    display: flex;
    gap: 40px;
    align-items: center;
    margin: 25px 0;
    background: var(--panel-bg);
    border: 1px solid #f0f0f0;
    border-radius: 15px;
    padding: 30px;
    box-shadow: var(--shadow-soft);
}

.interface-visual {
    flex: 0 0 200px;
    text-align: center;
}

.interface-visual img {
    height: auto;
    border: 1px solid var(--image-border);
    padding: 10px;
    background: var(--panel-bg);
    border-radius: 8px;
}

.img-backpanel {
    max-width: 150px;
}

.img-pinmap {
    max-width: 130px;
}

.img-full {
    width: 100%;
    max-width: 1000px;
    height: auto;
    display: block;
    margin: 10px auto;
}

.img-large {
    width: 100%;
    max-width: 800px;
    height: auto;
    display: block;
    margin: 10px auto;
}

.img-medium {
    width: 100%;
    max-width: 500px;
    height: auto;
    display: block;
    margin: 10px auto;
}

.img-small {
    width: 100%;
    max-width: 300px;
    height: auto;
    display: block;
    margin: 10px auto;
}

.img-ui-screenshot {
    width: 100%;
    max-width: 650px;
    height: auto;
    display: block;
    margin: 15px auto;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.interface-table-wrapper {
    flex: 1;
    min-width: 0;
}

.visual-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin: 30px 0;
}

.visual-block {
    background: var(--panel-bg);
    border: 1px solid var(--image-border);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
}

.visual-block img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.dimension-block {
    background: var(--panel-bg);
    border: 1px solid #d1d9e0;
    border-radius: 12px;
    padding: 40px;
    margin: 30px 0;
    text-align: center;
}

.dimension-block img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.caption {
    font-size: 0.85rem;
    color: var(--caption-text);
    margin-top: 15px;
    font-weight: 600;
}

.box {
    padding: 20px 25px;
    border-radius: 8px;
    margin: 30px 0;
    display: block;
}

.note {
    background-color: #e8f4fd;
    border-left: 5px solid #3498db;
}

.warning {
    background-color: #fff9db;
    border-left: 5px solid #fcc419;
}

.note-icon {
    display: none;
}

footer {
    margin-top: 100px;
    padding: 50px 0;
    border-top: 1px solid var(--image-border);
    font-size: 0.85rem;
    color: #95a5a6;
    text-align: center;
}

@media screen and (max-width: 1024px) {
    .sidebar {
        width: 60px;
        padding: 20px 10px;
    }

    .sidebar h2,
    .sidebar li a span {
        display: none;
    }

    .content {
        margin-left: 60px;
        width: calc(100% - 60px);
        padding: 40px;
    }
}

@media screen and (max-width: 900px) {
    .header-box {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .header-visual-group {
        align-items: center;
        flex: 0 0 auto;
        width: 100%;
        margin-top: 20px;
    }

    .interface-card {
        flex-direction: column;
        align-items: center;
    }

    .visual-grid {
        grid-template-columns: 1fr;
    }
}