/* ===== 空放官网主题 · 墨绿 + 琥珀金 ===== */
:root {
    --jz-primary: #1a4f42;
    --jz-primary-dark: #123830;
    --jz-primary-light: #2d6b5c;
    --jz-accent: #c8952e;
    --jz-accent-hover: #a87a22;
    --jz-bg: #f5f3ee;
    --jz-bg-alt: #ebe8e1;
    --jz-card: #ffffff;
    --jz-text: #2a3230;
    --jz-muted: #5c6864;
    --jz-border: #ddd8cf;
    --jz-radius: 10px;
    --jz-radius-lg: 14px;
    --jz-shadow: 0 4px 20px rgba(26, 79, 66, 0.08);
    --jz-header-h: 68px;
    --jz-container: 1140px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif;
    font-size: 15px;
    line-height: 1.7;
    color: var(--jz-text);
    background: var(--jz-bg);
    overflow-x: hidden;
}

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

a {
    color: var(--jz-primary-light);
    transition: color 0.2s ease;
}

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

ul, ol {
    list-style: none;
}

.z4f7c3container {
    width: 100%;
    max-width: var(--jz-container);
    margin: 0 auto;
    padding: 0 20px;
}

/* ----- 顶栏 ----- */
.z4f7c3header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--jz-border);
    backdrop-filter: blur(8px);
}

.z4f7c3header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--jz-header-h);
    gap: 16px;
}

.z4f7c3logo-link {
    font-size: 18px;
    font-weight: 700;
    color: var(--jz-primary);
    text-decoration: none;
    white-space: nowrap;
}

.z4f7c3main-nav ul {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 4px 6px;
}

.z4f7c3main-nav ul li a {
    display: block;
    padding: 8px 10px;
    font-size: 14px;
    color: var(--jz-text);
    text-decoration: none;
    border-radius: 6px;
    white-space: nowrap;
}

.z4f7c3main-nav ul li a:hover,
.z4f7c3main-nav .z4f7c3this a,
.z4f7c3main-nav li.z4f7c3active a {
    color: var(--jz-primary);
    background: rgba(26, 79, 66, 0.08);
}

.z4f7c3menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 18px;
    cursor: pointer;
    flex-shrink: 0;
}

.z4f7c3menu-toggle span {
    display: block;
    height: 2px;
    background: var(--jz-primary);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.z4f7c3nav-overlay {
    display: none;
}

/* ----- 按钮 ----- */
.z4f7c3btn {
    display: inline-block;
    padding: 11px 24px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.25s ease;
    text-align: center;
}

.z4f7c3btn-primary {
    background: var(--jz-accent);
    color: #fff;
    border-color: var(--jz-accent);
}

.z4f7c3btn-primary:hover {
    background: var(--jz-accent-hover);
    border-color: var(--jz-accent-hover);
    color: #fff;
    transform: translateY(-1px);
}

.z4f7c3btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.7);
}

.z4f7c3btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

.z4f7c3btn-block {
    width: 100%;
}

/* ----- 区块标题 ----- */
.z4f7c3section-head {
    text-align: center;
    margin-bottom: 40px;
}

.z4f7c3section-head-light .z4f7c3section-title,
.z4f7c3section-head-light .z4f7c3section-desc {
    color: #fff;
}

.z4f7c3section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--jz-primary);
    margin-bottom: 10px;
    line-height: 1.35;
}

.z4f7c3section-desc {
    font-size: 15px;
    color: var(--jz-muted);
    max-width: 560px;
    margin: 0 auto;
}

/* ----- 首页 Hero ----- */
.z4f7c3hero {
    margin-top: var(--jz-header-h);
    padding: 56px 0 64px;
    background: linear-gradient(145deg, var(--jz-primary-dark) 0%, var(--jz-primary) 55%, #2a5c50 100%);
    color: #fff;
    overflow: hidden;
}

.z4f7c3hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: center;
}

.z4f7c3hero-tag {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 0.05em;
    padding: 6px 14px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 20px;
    margin-bottom: 16px;
}

.z4f7c3hero-title {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 16px;
}

.z4f7c3hero-lead {
    font-size: 16px;
    opacity: 0.92;
    margin-bottom: 24px;
    max-width: 520px;
}

.z4f7c3hero-lead strong {
    color: var(--jz-accent);
    font-weight: 600;
}

.z4f7c3hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 28px;
}

.z4f7c3hero-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.z4f7c3hero-metrics li strong {
    display: block;
    font-size: 22px;
    color: var(--jz-accent);
}

.z4f7c3hero-metrics li span {
    font-size: 13px;
    opacity: 0.85;
}

.z4f7c3hero-visual img {
    border-radius: var(--jz-radius-lg);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

/* ----- 简介 ----- */
.z4f7c3intro {
    padding: 64px 0;
    background: var(--jz-card);
}

.z4f7c3intro-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.z4f7c3intro-card {
    padding: 24px;
    background: var(--jz-bg);
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius);
    border-top: 3px solid var(--jz-accent);
}

.z4f7c3intro-card h3 {
    font-size: 17px;
    color: var(--jz-primary);
    margin-bottom: 12px;
}

.z4f7c3intro-card p {
    font-size: 14px;
    color: var(--jz-muted);
    line-height: 1.75;
}

/* ----- 产品 ----- */
.z4f7c3products {
    padding: 64px 0;
    background: var(--jz-primary);
}

.z4f7c3product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.z4f7c3product-card {
    background: var(--jz-card);
    border-radius: var(--jz-radius);
    padding: 24px;
    border: 1px solid var(--jz-border);
    display: flex;
    flex-direction: column;
}

.z4f7c3product-num {
    font-size: 12px;
    font-weight: 700;
    color: var(--jz-accent);
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.z4f7c3product-card h3 {
    font-size: 18px;
    color: var(--jz-primary);
    margin-bottom: 10px;
}

.z4f7c3product-card > p {
    font-size: 14px;
    color: var(--jz-muted);
    margin-bottom: 14px;
    flex: 1;
}

.z4f7c3product-card ul {
    margin-bottom: 16px;
}

.z4f7c3product-card ul li {
    font-size: 13px;
    color: var(--jz-text);
    padding: 4px 0 4px 18px;
    position: relative;
}

.z4f7c3product-card ul li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 11px;
    width: 6px;
    height: 6px;
    background: var(--jz-accent);
    border-radius: 50%;
}

.z4f7c3product-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--jz-primary-light);
    text-decoration: none;
}

/* ----- 流程时间线 ----- */
.z4f7c3process {
    padding: 64px 0;
    background: var(--jz-bg);
}

.z4f7c3timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.z4f7c3timeline-item {
    background: var(--jz-card);
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius);
    padding: 22px 18px;
    text-align: center;
}

.z4f7c3timeline-step {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--jz-primary);
    color: #fff;
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: 12px;
}

.z4f7c3timeline-item h3 {
    font-size: 16px;
    color: var(--jz-primary);
    margin-bottom: 8px;
}

.z4f7c3timeline-item p {
    font-size: 13px;
    color: var(--jz-muted);
    line-height: 1.6;
}

/* ----- 案例 ----- */
.z4f7c3cases {
    padding: 64px 0;
    background: var(--jz-card);
}

.z4f7c3cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.z4f7c3case-card {
    padding: 22px;
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius);
    background: var(--jz-bg);
}

.z4f7c3case-card h3 {
    font-size: 16px;
    color: var(--jz-primary);
    margin-bottom: 10px;
}

.z4f7c3case-card p {
    font-size: 14px;
    color: var(--jz-muted);
    margin-bottom: 14px;
    line-height: 1.65;
}

.z4f7c3case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.z4f7c3case-tags span {
    font-size: 12px;
    padding: 4px 10px;
    background: rgba(26, 79, 66, 0.1);
    color: var(--jz-primary);
    border-radius: 4px;
}

/* ----- 优势 ----- */
.z4f7c3advantages {
    padding: 64px 0;
    background: var(--jz-primary-dark);
}

.z4f7c3adv-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.z4f7c3adv-item {
    padding: 20px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--jz-radius);
    color: #fff;
}

.z4f7c3adv-item h3 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--jz-accent);
}

.z4f7c3adv-item p {
    font-size: 13px;
    opacity: 0.88;
    line-height: 1.6;
}

/* ----- 知识 ----- */
.z4f7c3knowledge {
    padding: 64px 0;
    background: var(--jz-bg-alt);
}

.z4f7c3knowledge-box {
    background: var(--jz-card);
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius-lg);
    padding: 32px;
}

.z4f7c3knowledge-box > .z4f7c3section-title {
    margin-bottom: 24px;
    text-align: center;
}

.z4f7c3knowledge-cols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.z4f7c3knowledge-cols h3 {
    font-size: 16px;
    color: var(--jz-primary);
    margin-bottom: 10px;
}

.z4f7c3knowledge-cols p {
    font-size: 14px;
    color: var(--jz-muted);
    line-height: 1.75;
}

/* ----- FAQ ----- */
.z4f7c3faq {
    padding: 64px 0;
    background: var(--jz-card);
}

.z4f7c3faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.z4f7c3faq-item {
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius);
    margin-bottom: 10px;
    overflow: hidden;
    background: var(--jz-bg);
}

.z4f7c3faq-item summary {
    padding: 16px 20px;
    font-size: 15px;
    font-weight: 600;
    color: var(--jz-primary);
    cursor: pointer;
    list-style: none;
}

.z4f7c3faq-item summary::-webkit-details-marker {
    display: none;
}

.z4f7c3faq-item p {
    padding: 0 20px 16px;
    font-size: 14px;
    color: var(--jz-muted);
    line-height: 1.7;
}

/* ----- 首页资讯 ----- */
.z4f7c3articles {
    padding: 64px 0;
    background: var(--jz-bg);
}

.z4f7c3article-home-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.z4f7c3article-home-card {
    background: var(--jz-card);
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius);
    overflow: hidden;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.z4f7c3article-home-card:hover {
    box-shadow: var(--jz-shadow);
    transform: translateY(-3px);
}

.z4f7c3article-home-thumb {
    display: block;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--jz-bg-alt);
}

.z4f7c3article-home-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.z4f7c3article-home-title {
    font-size: 14px;
    padding: 12px;
    line-height: 1.45;
}

.z4f7c3article-home-title a {
    color: var(--jz-text);
    text-decoration: none;
}

.z4f7c3article-home-title a:hover {
    color: var(--jz-primary);
}

/* ----- 联系 ----- */
.z4f7c3contact {
    padding: 64px 0;
    background: var(--jz-card);
    border-top: 1px solid var(--jz-border);
}

.z4f7c3contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.z4f7c3contact-info .z4f7c3section-title {
    text-align: left;
    margin-bottom: 16px;
}

.z4f7c3contact-info > p {
    font-size: 14px;
    color: var(--jz-muted);
    margin-bottom: 20px;
    line-height: 1.7;
}

.z4f7c3contact-list li {
    font-size: 14px;
    color: var(--jz-text);
    padding: 8px 0;
    border-bottom: 1px solid var(--jz-border);
}

.z4f7c3contact-form {
    background: var(--jz-bg);
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius-lg);
    padding: 28px;
}

.z4f7c3form-group {
    margin-bottom: 14px;
}

.z4f7c3form-group input,
.z4f7c3form-group select,
.z4f7c3form-group textarea {
    width: 100%;
    padding: 11px 14px;
    font-size: 14px;
    border: 1px solid var(--jz-border);
    border-radius: 8px;
    background: var(--jz-card);
    color: var(--jz-text);
    font-family: inherit;
}

.z4f7c3form-group input:focus,
.z4f7c3form-group select:focus,
.z4f7c3form-group textarea:focus {
    outline: none;
    border-color: var(--jz-primary-light);
    box-shadow: 0 0 0 3px rgba(26, 79, 66, 0.12);
}

.z4f7c3form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ----- 页脚 ----- */
.z4f7c3footer {
    background: var(--jz-primary-dark);
    color: rgba(255, 255, 255, 0.85);
    padding: 40px 0 24px;
}

.z4f7c3footer-top {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.z4f7c3footer-brand strong {
    font-size: 18px;
    color: #fff;
    display: block;
    margin-bottom: 8px;
}

.z4f7c3footer-brand p,
.z4f7c3footer-contact p {
    font-size: 13px;
    line-height: 1.7;
    opacity: 0.85;
}

.z4f7c3footer a {
    color: var(--jz-accent);
}

.z4f7c3footer-links,
.z4f7c3footer-stats {
    font-size: 13px;
    text-align: center;
    padding: 8px 0;
    opacity: 0.8;
}

.z4f7c3friend-links a {
    margin: 0 8px;
}

/* ===== 内页通用 ===== */
.z4f7c3page-banner {
    margin-top: var(--jz-header-h);
    padding: 36px 0;
    background: linear-gradient(135deg, var(--jz-primary-dark), var(--jz-primary));
    color: #fff;
}

.z4f7c3page-title {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.35;
}

.z4f7c3breadcrumb {
    font-size: 14px;
    opacity: 0.9;
}

.z4f7c3breadcrumb a {
    color: #fff;
    text-decoration: none;
}

.z4f7c3layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 28px;
    padding: 36px 20px 56px;
    align-items: start;
}

.z4f7c3main {
    min-width: 0;
}

/* 列表 */
.z4f7c3list-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.z4f7c3list-card {
    display: flex;
    gap: 20px;
    background: var(--jz-card);
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius);
    overflow: hidden;
    transition: box-shadow 0.25s ease;
}

.z4f7c3list-card:hover {
    box-shadow: var(--jz-shadow);
}

.z4f7c3list-thumb {
    flex: 0 0 240px;
    max-width: 40%;
    display: block;
    background: var(--jz-bg-alt);
    overflow: hidden;
}

.z4f7c3list-thumb img {
    width: 100%;
    height: 100%;
    min-height: 160px;
    object-fit: cover;
}

.z4f7c3list-body {
    flex: 1;
    padding: 20px 20px 20px 0;
    min-width: 0;
}

.z4f7c3list-title {
    font-size: 18px;
    margin-bottom: 8px;
    line-height: 1.4;
}

.z4f7c3list-title a {
    color: var(--jz-primary);
    text-decoration: none;
}

.z4f7c3list-meta {
    font-size: 13px;
    color: var(--jz-muted);
    margin-bottom: 10px;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.z4f7c3list-desc {
    font-size: 14px;
    color: var(--jz-muted);
    line-height: 1.65;
    margin-bottom: 10px;
}

.z4f7c3list-more {
    font-size: 14px;
    font-weight: 600;
    color: var(--jz-accent);
    text-decoration: none;
}

/* 分页 */
.z4f7c3pagebar {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--jz-border);
}

.z4f7c3pagelist {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    list-style: none;
}

.z4f7c3pagelist li {
    list-style: none;
}

.z4f7c3pagelist a,
.z4f7c3pagelist span {
    display: inline-block;
    padding: 8px 14px;
    font-size: 14px;
    border: 1px solid var(--jz-border);
    border-radius: 6px;
    text-decoration: none;
    color: var(--jz-text);
    background: var(--jz-card);
}

.z4f7c3pagelist a:hover,
.z4f7c3pagelist .thisclass,
.z4f7c3pagelist .active {
    background: var(--jz-primary);
    color: #fff;
    border-color: var(--jz-primary);
}

/* 内容页 */
.z4f7c3article-detail {
    background: var(--jz-card);
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius-lg);
    padding: 28px;
    margin-bottom: 28px;
}

.z4f7c3article-meta {
    font-size: 13px;
    color: var(--jz-muted);
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--jz-border);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.z4f7c3article-meta a {
    color: var(--jz-primary);
    text-decoration: none;
}

.z4f7c3article-cover {
    margin-bottom: 20px;
    border-radius: var(--jz-radius);
    overflow: hidden;
}

.z4f7c3article-cover img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
}

.z4f7c3article-cover:empty,
.z4f7c3article-cover img[src=""],
.z4f7c3article-cover img:not([src]) {
    display: none;
}

.z4f7c3article-body {
    font-size: 16px;
    line-height: 1.85;
    color: var(--jz-text);
    word-break: break-word;
}

.z4f7c3article-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 12px 0;
}

.z4f7c3article-images {
    margin-top: 16px;
}

.z4f7c3article-figure {
    margin: 16px 0;
    text-align: center;
}

.z4f7c3article-figure figcaption {
    font-size: 13px;
    color: var(--jz-muted);
    margin-top: 8px;
}

.z4f7c3diyfield {
    margin-top: 20px;
    padding: 16px;
    background: var(--jz-bg);
    border-radius: var(--jz-radius);
    font-size: 14px;
}

.z4f7c3meta-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
}

.z4f7c3tagitem a {
    display: inline-block;
    padding: 5px 12px;
    font-size: 13px;
    background: rgba(26, 79, 66, 0.1);
    color: var(--jz-primary);
    border-radius: 20px;
    text-decoration: none;
}

.z4f7c3article-prenext {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--jz-border);
}

.z4f7c3pn-item {
    font-size: 14px;
    line-height: 1.5;
    min-width: 0;
}

.z4f7c3pn-prev {
    text-align: left;
}

.z4f7c3pn-next {
    text-align: right;
}

.z4f7c3pn-item a {
    color: var(--jz-primary);
    text-decoration: none;
}

/* 隐藏 prenext 内重复块 */
.z4f7c3pn-item .prenext,
.z4f7c3pn-item .next {
    display: block;
}

.z4f7c3related-title {
    font-size: 20px;
    color: var(--jz-primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--jz-accent);
}

.z4f7c3related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.z4f7c3related-card {
    background: var(--jz-card);
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius);
    overflow: hidden;
}

.z4f7c3related-thumb {
    display: block;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--jz-bg-alt);
}

.z4f7c3related-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.z4f7c3related-card h4 {
    font-size: 14px;
    padding: 10px 12px 0;
    line-height: 1.4;
}

.z4f7c3related-card h4 a {
    color: var(--jz-text);
    text-decoration: none;
}

.z4f7c3related-card p {
    font-size: 12px;
    color: var(--jz-muted);
    padding: 6px 12px 12px;
    line-height: 1.5;
}

/* 侧栏 */
.z4f7c3sidebar {
    position: sticky;
    top: calc(var(--jz-header-h) + 16px);
}

.z4f7c3sidebar-box {
    background: var(--jz-card);
    border: 1px solid var(--jz-border);
    border-radius: var(--jz-radius);
    padding: 18px;
}

.z4f7c3sidebar-title {
    font-size: 16px;
    color: var(--jz-primary);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--jz-accent);
}

.z4f7c3sidebar-item {
    border-bottom: 1px solid var(--jz-border);
}

.z4f7c3sidebar-item:last-child {
    border-bottom: none;
}

.z4f7c3sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    text-decoration: none;
    color: var(--jz-text);
}

.z4f7c3sidebar-link:hover {
    color: var(--jz-primary);
}

.z4f7c3sidebar-thumb {
    flex: 0 0 56px;
    width: 56px;
    height: 42px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--jz-bg-alt);
}

.z4f7c3sidebar-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.z4f7c3sidebar-text {
    flex: 1;
    font-size: 13px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-width: 0;
}

/* ===== 移动端导航 ===== */
@media (max-width: 992px) {
    .z4f7c3menu-toggle {
        display: flex;
    }

    .z4f7c3main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: min(300px, 88vw);
        height: 100vh;
        background: var(--jz-card);
        box-shadow: -4px 0 24px rgba(0, 0, 0, 0.12);
        transition: right 0.3s ease;
        z-index: 1001;
        padding-top: 72px;
    }

    .z4f7c3main-nav.z4f7c3active {
        right: 0;
    }

    .z4f7c3main-nav ul {
        flex-direction: column;
        align-items: stretch;
        padding: 0 16px 24px;
    }

    .z4f7c3main-nav ul li {
        width: 100%;
        border-bottom: 1px solid var(--jz-border);
    }

    .z4f7c3main-nav ul li a {
        padding: 14px 8px;
        border-radius: 0;
    }

    .z4f7c3menu-toggle.z4f7c3active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .z4f7c3menu-toggle.z4f7c3active span:nth-child(2) {
        opacity: 0;
    }

    .z4f7c3menu-toggle.z4f7c3active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .z4f7c3nav-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.45);
        z-index: 1000;
    }

    .z4f7c3nav-overlay.z4f7c3active {
        display: block;
    }

    .z4f7c3hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .z4f7c3hero-lead {
        margin-left: auto;
        margin-right: auto;
    }

    .z4f7c3hero-actions,
    .z4f7c3hero-metrics {
        justify-content: center;
    }

    .z4f7c3hero-title {
        font-size: 28px;
    }

    .z4f7c3intro-grid,
    .z4f7c3product-grid,
    .z4f7c3timeline,
    .z4f7c3cases-grid,
    .z4f7c3adv-grid,
    .z4f7c3knowledge-cols,
    .z4f7c3article-home-grid,
    .z4f7c3contact-wrap,
    .z4f7c3layout,
    .z4f7c3related-grid {
        grid-template-columns: 1fr;
    }

    .z4f7c3product-grid {
        grid-template-columns: 1fr;
    }

    .z4f7c3timeline {
        grid-template-columns: repeat(2, 1fr);
    }

    .z4f7c3article-home-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .z4f7c3list-card {
        flex-direction: column;
    }

    .z4f7c3list-thumb {
        flex: none;
        max-width: 100%;
    }

    .z4f7c3list-body {
        padding: 16px;
    }

    .z4f7c3sidebar {
        position: static;
    }

    .z4f7c3footer-top {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .z4f7c3section-title {
        font-size: 22px;
    }

    .z4f7c3hero {
        padding: 40px 0 48px;
    }

    .z4f7c3hero-title {
        font-size: 24px;
    }

    .z4f7c3timeline {
        grid-template-columns: 1fr;
    }

    .z4f7c3adv-grid {
        grid-template-columns: 1fr;
    }

    .z4f7c3article-home-grid {
        grid-template-columns: 1fr;
    }

    .z4f7c3article-prenext {
        grid-template-columns: 1fr;
    }

    .z4f7c3pn-next {
        text-align: left;
    }

    .z4f7c3pagelist {
        justify-content: center;
    }

    .z4f7c3page-title {
        font-size: 22px;
    }

    .z4f7c3article-detail {
        padding: 18px 14px;
    }

    .z4f7c3knowledge-box {
        padding: 20px 16px;
    }
}

@media (max-width: 480px) {
    .z4f7c3container {
        padding: 0 14px;
    }

    .z4f7c3logo-link {
        font-size: 15px;
        max-width: 160px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .z4f7c3hero-metrics {
        gap: 16px;
    }

    .z4f7c3btn {
        width: 100%;
    }

    .z4f7c3hero-actions .z4f7c3btn {
        width: auto;
        flex: 1;
        min-width: 120px;
    }
}

}