/* ===== Design System — Indigo / Teal Corporate Theme ===== */
:root {
    --color-primary: #0c1929;
    --color-primary-light: #152238;
    --color-accent: #6366f1;
    --color-accent-hover: #4f46e5;
    --color-teal: #14b8a6;
    --color-orange: #f97316;
    --color-bg: #f1f5f9;
    --color-white: #ffffff;
    --color-muted: #e2e8f0;
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-light: #94a3b8;
    --color-border: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 8px 30px rgba(15, 23, 42, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --header-h: 64px;
    --container: 1140px;
    --gap: 24px;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", -apple-system, sans-serif;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--color-accent-hover);
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* ===== Header ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-h);
    background: var(--color-primary);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
    gap: 16px;
}

.site-logo {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-white);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
    flex-shrink: 0;
}

.site-nav ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-wrap: nowrap;
}

.site-nav a {
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.88rem;
    padding: 6px 12px;
    border-radius: 6px;
    white-space: nowrap;
    transition: all 0.2s;
}

.site-nav a:hover,
.site-nav .z54007this a,
.site-nav li.z54007this a {
    color: var(--color-white);
    background: rgba(99, 102, 241, 0.25);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
}

.menu-toggle span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--color-white);
    border-radius: 2px;
    transition: all 0.3s;
}

.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s;
}

.nav-overlay.active {
    display: block;
    opacity: 1;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.2s;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: var(--color-white);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    border-color: var(--color-white);
}

/* ===== Hero ===== */
.hero {
    margin-top: var(--header-h);
    background: linear-gradient(135deg, var(--color-primary) 0%, #1a2744 50%, #1e1b4b 100%);
    color: var(--color-white);
    padding: 72px 0 64px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.4);
    border-radius: 20px;
    font-size: 0.8rem;
    color: #a5b4fc;
    margin-bottom: 16px;
}

.hero-text h2 {
    font-size: 2rem;
    line-height: 1.35;
    margin-bottom: 16px;
    font-weight: 700;
}

.hero-desc {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 12px;
}

.hero-intro {
    font-size: 0.92rem;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: 28px;
    line-height: 1.8;
}

.hero-intro strong {
    color: #c7d2fe;
    font-weight: 600;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 24px 20px;
    text-align: center;
}

.stat-card strong {
    display: block;
    font-size: 1.8rem;
    color: var(--color-teal);
    margin-bottom: 4px;
    font-weight: 700;
}

.stat-card span {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ===== Sections ===== */
.section {
    padding: 64px 0;
}

.section-light {
    background: var(--color-white);
}

.section-dark {
    background: var(--color-primary);
    color: var(--color-white);
}

.section-muted {
    background: var(--color-bg);
}

.section-head {
    text-align: center;
    margin-bottom: 40px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.section-head-light .section-title,
.section-head-light .section-subtitle {
    color: var(--color-white);
}

.section-head-light .section-subtitle {
    opacity: 0.7;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.section-head-light .section-tag {
    color: var(--color-teal);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-text);
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===== Card Grids ===== */
.card-grid {
    display: grid;
    gap: var(--gap);
}

.card-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.info-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    transition: box-shadow 0.25s, transform 0.25s;
    height: 100%;
}

.section-light .info-card {
    background: var(--color-bg);
}

.info-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.card-icon {
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.info-card h3 {
    font-size: 1.05rem;
    margin-bottom: 10px;
    color: var(--color-text);
}

.info-card p {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
}

.info-card strong {
    color: var(--color-accent);
    font-weight: 600;
}

/* ===== Advantages ===== */
.advantage-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
}

.advantage-item {
    padding: 28px 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.04);
    height: 100%;
}

.advantage-num {
    width: 36px;
    height: 36px;
    line-height: 36px;
    text-align: center;
    background: var(--color-teal);
    color: var(--color-white);
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 14px;
}

.advantage-item h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
    color: var(--color-white);
}

.advantage-item p {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.7;
}

/* ===== Pricing ===== */
.price-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.price-card-featured {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
}

.price-badge {
    position: absolute;
    top: -1px;
    right: 24px;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 0.75rem;
    padding: 4px 14px;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    font-weight: 600;
}

.price-level {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}

.price-amount {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.price-list {
    list-style: none;
    margin-bottom: 16px;
    flex: 1;
}

.price-list li {
    padding: 8px 0;
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
    padding-left: 20px;
    position: relative;
}

.price-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-teal);
    font-weight: 700;
    font-size: 0.8rem;
}

.price-list li:last-child {
    border-bottom: none;
}

.price-note {
    font-size: 0.82rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-top: auto;
}

.price-note strong {
    color: var(--color-accent);
}

/* ===== Security Split ===== */
.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.split-content .section-title {
    text-align: left;
    margin-bottom: 16px;
}

.split-text {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
    line-height: 1.8;
}

.split-text strong {
    color: var(--color-accent);
}

.check-list {
    list-style: none;
    margin-top: 20px;
}

.check-list li {
    padding: 8px 0 8px 28px;
    position: relative;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 14px;
    width: 16px;
    height: 16px;
    background: var(--color-teal);
    border-radius: 4px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='white'%3E%3Cpath d='M6.5 11.5L3 8l1-1 2.5 2.5L12 4l1 1z'/%3E%3C/svg%3E");
    background-size: 12px;
    background-repeat: no-repeat;
    background-position: center;
}

.split-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.security-block {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px 20px;
    text-align: center;
}

.security-block h4 {
    font-size: 1rem;
    color: var(--color-accent);
    margin-bottom: 6px;
}

.security-block p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

/* ===== Knowledge ===== */
.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
}

.knowledge-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    height: 100%;
}

.knowledge-card h3 {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 10px;
    line-height: 1.5;
}

.knowledge-card p {
    font-size: 0.86rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
}

.knowledge-card strong {
    color: var(--color-accent);
    font-weight: 600;
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
}

.faq-item summary {
    padding: 18px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: "+";
    font-size: 1.2rem;
    color: var(--color-accent);
    font-weight: 400;
    flex-shrink: 0;
    margin-left: 12px;
}

.faq-item[open] summary::after {
    content: "−";
}

.faq-item p {
    padding: 0 24px 18px;
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
}

.faq-item strong {
    color: var(--color-accent);
}

/* ===== Article Grid (Homepage) ===== */
.article-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.article-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: box-shadow 0.25s;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.section-light .article-card {
    background: var(--color-bg);
}

.article-card:hover {
    box-shadow: var(--shadow-md);
}

.article-thumb {
    display: block;
    aspect-ratio: 3 / 2;
    overflow: hidden;
    background: var(--color-muted);
}

.article-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.article-card:hover .article-thumb img {
    transform: scale(1.04);
}

.article-info {
    padding: 12px 14px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-info h3 {
    font-size: 0.85rem;
    line-height: 1.45;
    margin-bottom: 6px;
    flex: 1;
}

.article-info h3 a {
    color: var(--color-text);
}

.article-info h3 a:hover {
    color: var(--color-accent);
}

.article-date {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
}

.contact-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    height: 100%;
}

.contact-card h3 {
    font-size: 1.1rem;
    color: var(--color-teal);
    margin-bottom: 10px;
}

.contact-lead {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: 20px;
    line-height: 1.7;
}

.contact-lead strong {
    color: #a5b4fc;
}

.contact-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    gap: 12px;
}

.contact-label {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.5);
    flex-shrink: 0;
}

.contact-value {
    font-size: 0.88rem;
    color: var(--color-white);
    text-align: right;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.6);
    padding: 40px 0 32px;
    text-align: center;
}

.footer-links {
    margin-bottom: 24px;
}

.footer-links h3 {
    font-size: 0.95rem;
    color: var(--color-teal);
    margin-bottom: 12px;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 20px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.85rem;
}

.footer-links a:hover {
    color: var(--color-teal);
}

.footer-copyright p {
    font-size: 0.82rem;
    margin: 4px 0;
}

.footer-copyright a {
    color: var(--color-teal);
}

.footer-copyright a:hover {
    color: #5eead4;
}

/* ===== Inner Pages: Banner ===== */
.page-banner {
    margin-top: var(--header-h);
    background: linear-gradient(135deg, var(--color-primary), #1e1b4b);
    color: var(--color-white);
    padding: 48px 0 36px;
    text-align: center;
}

.page-banner h2 {
    font-size: 1.6rem;
    margin-bottom: 10px;
    font-weight: 700;
    word-break: break-word;
}

.breadcrumb {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a {
    color: #a5b4fc;
}

.breadcrumb .sep {
    margin: 0 8px;
    opacity: 0.4;
}

/* ===== Inner Pages: Layout ===== */
.page-main {
    padding: 32px 0 48px;
}

.page-layout {
    display: flex;
    gap: var(--gap);
    align-items: flex-start;
}

.page-content {
    flex: 1;
    min-width: 0;
}

/* ===== List Page ===== */
.listbox {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 8px 24px;
    box-shadow: var(--shadow-sm);
}

.list-items {
    list-style: none;
}

.list-item {
    display: flex;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
    align-items: flex-start;
}

.list-item:last-child {
    border-bottom: none;
}

.list-item-thumb {
    flex-shrink: 0;
    width: 180px;
    height: 120px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--color-muted);
}

.list-item-thumb a {
    display: block;
    width: 100%;
    height: 100%;
}

.list-item-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.list-item-body {
    flex: 1;
    min-width: 0;
}

.list-item-meta {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: 6px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
}

.list-cat a {
    color: var(--color-accent);
}

.list-item-title {
    font-size: 1.05rem;
    margin-bottom: 8px;
    line-height: 1.45;
}

.list-item-title a {
    color: var(--color-text);
}

.list-item-title a:hover {
    color: var(--color-accent);
}

.list-item-intro {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== Pagination ===== */
.pagebar {
    margin-top: 20px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 14px 20px;
    box-shadow: var(--shadow-sm);
}

.pagelist.pagebar-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    list-style: none;
    gap: 8px;
    width: 100%;
    padding: 0;
    margin: 0;
}

.pagelist.pagebar-flex li:first-child {
    margin-right: auto;
}

.pagelist.pagebar-flex li:last-child {
    margin-left: auto;
}

.pagebar a,
.pagebar span {
    display: inline-block;
    padding: 6px 14px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    border-radius: 6px;
    border: 1px solid var(--color-border);
    transition: all 0.2s;
}

.pagebar a:hover {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.pagebar .thisclass,
.pagebar .current {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

/* ===== Sidebar ===== */
.sidebar {
    width: 280px;
    flex-shrink: 0;
}

.sidebar-block {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.sidebar-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-accent);
}

.sidebar-imglist {
    list-style: none;
}

.sidebar-imgitem {
    border-bottom: 1px solid var(--color-border);
}

.sidebar-imgitem:last-child {
    border-bottom: none;
}

.sidebar-imglink {
    display: flex;
    gap: 12px;
    padding: 10px 0;
    align-items: flex-start;
    color: var(--color-text);
}

.sidebar-imglink:hover {
    color: var(--color-accent);
}

.sidebar-img {
    flex-shrink: 0;
    width: 72px;
    height: 54px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--color-muted);
}

.sidebar-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sidebar-imgtitle {
    flex: 1;
    min-width: 0;
    font-size: 0.85rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== Article Detail ===== */
.article-detail {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

.article-header {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
}

.article-title {
    font-size: 1.6rem;
    line-height: 1.4;
    margin-bottom: 12px;
    color: var(--color-text);
    word-break: break-word;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
    font-size: 0.82rem;
    color: var(--color-text-light);
}

.article-meta a {
    color: var(--color-accent);
}

.article-litpic {
    margin-bottom: 24px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    text-align: center;
}

.article-litpic img {
    max-width: 100%;
    margin: 0 auto;
    border-radius: var(--radius-sm);
}

.article-body {
    font-size: 0.95rem;
    line-height: 1.85;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    word-break: break-word;
    overflow-wrap: break-word;
}

.article-body img {
    max-width: 100%;
    height: auto;
    margin: 12px auto;
    border-radius: var(--radius-sm);
}

.article-body p {
    margin-bottom: 14px;
}

.article-body table {
    max-width: 100%;
    overflow-x: auto;
    display: block;
}

.article-images {
    margin-bottom: 20px;
}

.article-figure {
    margin-bottom: 16px;
    text-align: center;
}

.article-figure img {
    max-width: 100%;
    border-radius: var(--radius-sm);
    margin: 0 auto;
}

.article-figure figcaption {
    font-size: 0.82rem;
    color: var(--color-text-light);
    margin-top: 6px;
}

.z54007diyfield {
    margin-bottom: 20px;
    padding: 16px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    font-size: 0.9rem;
    overflow-x: auto;
}

.z54007meta-tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.z54007tagitem a {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 0.82rem;
    color: var(--color-text-secondary);
}

.z54007tagitem a:hover {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    font-size: 0.88rem;
    color: var(--color-text-secondary);
}

.article-nav-prev,
.article-nav-next {
    flex: 1;
    min-width: 0;
    word-break: break-word;
}

.article-nav-next {
    text-align: right;
}

.article-nav a {
    color: var(--color-accent);
}

/* ===== Related Articles ===== */
.related-articles {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.related-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-accent);
    color: var(--color-text);
}

.related-list {
    list-style: none;
}

.related-item {
    display: flex;
    gap: 16px;
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
    align-items: flex-start;
}

.related-item:last-child {
    border-bottom: none;
}

.related-thumb {
    flex-shrink: 0;
    width: 110px;
    height: 74px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--color-muted);
    display: block;
}

.related-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.related-body {
    flex: 1;
    min-width: 0;
}

.related-body > a {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--color-text);
    display: block;
    margin-bottom: 4px;
    line-height: 1.4;
}

.related-body > a:hover {
    color: var(--color-accent);
}

.related-body p {
    font-size: 0.82rem;
    color: var(--color-text-light);
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .card-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantage-row {
        grid-template-columns: repeat(2, 1fr);
    }

    .knowledge-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .article-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .split-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .site-nav a {
        font-size: 0.82rem;
        padding: 5px 8px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-h: 56px;
    }

    .menu-toggle {
        display: flex;
    }

    .site-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-primary);
        padding: 72px 20px 24px;
        transition: right 0.3s;
        z-index: 999;
        overflow-y: auto;
    }

    .site-nav.active {
        right: 0;
    }

    .site-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .site-nav a {
        padding: 12px 16px;
        font-size: 0.95rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        border-radius: 0;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .site-logo {
        max-width: 160px;
        font-size: 1rem;
    }

    .hero {
        padding: 48px 0 40px;
    }

    .hero-text h2 {
        font-size: 1.5rem;
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .stat-card {
        padding: 16px 12px;
    }

    .stat-card strong {
        font-size: 1.4rem;
    }

    .section {
        padding: 48px 0;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .card-grid-3,
    .card-grid-4,
    .advantage-row,
    .contact-grid,
    .knowledge-grid {
        grid-template-columns: 1fr;
    }

    .article-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

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

    .page-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
    }

    .list-item {
        flex-direction: column;
    }

    .list-item-thumb {
        width: 100%;
        height: 180px;
    }

    .article-detail {
        padding: 20px;
    }

    .article-title {
        font-size: 1.3rem;
    }

    .article-nav {
        flex-direction: column;
    }

    .article-nav-next {
        text-align: left;
    }

    .related-item {
        flex-direction: column;
    }

    .related-thumb {
        width: 100%;
        height: 160px;
    }

    .pagelist.pagebar-flex {
        justify-content: center;
    }

    .pagelist.pagebar-flex li:first-child,
    .pagelist.pagebar-flex li:last-child {
        margin: 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 14px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        text-align: center;
        width: 100%;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

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

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

    .site-nav {
        width: 100%;
        max-width: none;
    }

    .list-item-thumb {
        height: 150px;
    }

    .article-detail {
        padding: 16px;
    }

    .article-title {
        font-size: 1.15rem;
    }

    .article-meta {
        flex-direction: column;
        gap: 4px;
    }

    .pagebar a,
    .pagebar span {
        padding: 5px 10px;
        font-size: 0.78rem;
    }

    .listbox {
        padding: 4px 16px;
    }

    .price-card {
        padding: 24px 20px;
    }
}