/* ===== 变量与基础 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --c-primary: #0F766E;
    --c-primary-dark: #115E59;
    --c-primary-light: #CCFBF1;
    --c-accent: #EA580C;
    --c-bg: #FAFAF9;
    --c-surface: #FFFFFF;
    --c-text: #1C1917;
    --c-muted: #78716C;
    --c-border: #E7E5E4;
    --c-dark: #134E4A;
    --radius: 10px;
    --shadow: 0 4px 20px rgba(15, 118, 110, 0.08);
    --header-h: 64px;
}

html { scroll-behavior: smooth; }

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

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

a { color: var(--c-primary); transition: color 0.2s; }
a:hover { color: var(--c-accent); }

.z84b1ccontainer {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 头部导航 ===== */
.z84b1cheader {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
    box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}

.z84b1cheader-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--header-h);
    gap: 16px;
}

.z84b1clogo-link {
    font-size: 20px;
    font-weight: 700;
    color: var(--c-dark);
    text-decoration: none;
    white-space: nowrap;
}

.z84b1clogo-link:hover { color: var(--c-primary); }

.z84b1clogo { flex-shrink: 0; }

.z84b1cmain-nav { flex: 1; min-width: 0; }

.z84b1cmenu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    font-size: 22px;
    padding: 4px 10px;
    cursor: pointer;
    color: var(--c-dark);
    line-height: 1;
}

.z84b1cnav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
    gap: 4px 0;
}

.z84b1cnav-item a {
    display: block;
    padding: 8px 12px;
    font-size: 14px;
    color: var(--c-text);
    text-decoration: none;
    border-radius: 6px;
    white-space: nowrap;
}

.z84b1cnav-item a:hover,
.z84b1cnav-item.z84b1cthis a {
    color: var(--c-primary);
    background: var(--c-primary-light);
}

/* ===== 按钮 ===== */
.z84b1cbtn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.z84b1cbtn-primary {
    background: var(--c-accent);
    color: #fff;
    border-color: var(--c-accent);
}

.z84b1cbtn-primary:hover {
    background: #C2410C;
    border-color: #C2410C;
    color: #fff;
}

.z84b1cbtn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.6);
}

.z84b1cbtn-outline:hover {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

/* ===== 区块标题 ===== */
.z84b1csection-head { text-align: center; margin-bottom: 40px; }

.z84b1csection-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--c-dark);
    margin-bottom: 10px;
}

.z84b1csection-title-light { color: #fff; }

.z84b1csection-sub {
    font-size: 15px;
    color: var(--c-muted);
}

/* ===== 首页 Hero ===== */
.z84b1chero {
    padding: calc(var(--header-h) + 48px) 0 56px;
    background: linear-gradient(135deg, var(--c-dark) 0%, var(--c-primary) 100%);
    color: #fff;
}

.z84b1chero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.z84b1chero-main { min-width: 0; }

.z84b1chero-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(255,255,255,0.15);
    border-radius: 20px;
    font-size: 13px;
    margin-bottom: 16px;
}

.z84b1chero-title {
    font-size: 34px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 16px;
}

.z84b1chero-desc {
    font-size: 16px;
    opacity: 0.92;
    margin-bottom: 28px;
    line-height: 1.8;
}

.z84b1chero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 32px;
}

.z84b1chero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    list-style: none;
}

.z84b1chero-stats li {
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    padding: 14px 10px;
    text-align: center;
}

.z84b1chero-stats strong {
    display: block;
    font-size: 20px;
    margin-bottom: 2px;
}

.z84b1chero-stats span { font-size: 12px; opacity: 0.85; }

.z84b1chero-visual {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.25);
}

.z84b1chero-visual img {
    width: 100%;
    max-height: 360px;
    object-fit: cover;
}

/* ===== 简介 ===== */
.z84b1cintro { padding: 56px 0; }

.z84b1cintro-box {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 36px 40px;
    box-shadow: var(--shadow);
}

.z84b1cintro-text p {
    color: var(--c-muted);
    margin-bottom: 14px;
    line-height: 1.85;
}

.z84b1cintro-text p:last-child { margin-bottom: 0; }

.z84b1cintro-text strong { color: var(--c-primary); }

.z84b1cintro-box .z84b1csection-title,
.z84b1cknowledge-main .z84b1csection-title {
    text-align: left;
    margin-bottom: 20px;
    font-size: 24px;
}

/* ===== 产品 ===== */
.z84b1cproducts {
    padding: 56px 0;
    background: var(--c-surface);
}

.z84b1cproduct-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.z84b1cproduct-card {
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 28px 24px;
    background: var(--c-bg);
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
    transition: box-shadow 0.2s, transform 0.2s;
}

.z84b1cproduct-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-3px);
}

.z84b1cproduct-card-featured {
    border-color: var(--c-primary);
    background: var(--c-surface);
    box-shadow: var(--shadow);
}

.z84b1cproduct-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.z84b1cproduct-num {
    width: 32px; height: 32px;
    background: var(--c-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}

.z84b1cproduct-head h3 {
    font-size: 18px;
    color: var(--c-dark);
}

.z84b1cproduct-desc {
    font-size: 14px;
    color: var(--c-muted);
    flex: 1;
    margin-bottom: 18px;
    line-height: 1.75;
}

.z84b1cproduct-meta {
    list-style: none;
    border-top: 1px solid var(--c-border);
    padding-top: 16px;
    margin-bottom: 18px;
}

.z84b1cproduct-meta li {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    padding: 4px 0;
}

.z84b1cproduct-meta span { color: var(--c-muted); }

.z84b1cproduct-link {
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    color: var(--c-primary);
}

/* ===== 办理指南 ===== */
.z84b1cguide {
    padding: 56px 0;
    background: var(--c-bg);
}

.z84b1csteps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    list-style: none;
}

.z84b1cstep-item {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 24px 20px;
    min-width: 0;
}

.z84b1cstep-num {
    display: inline-flex;
    width: 36px; height: 36px;
    background: var(--c-primary-light);
    color: var(--c-primary);
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 14px;
}

.z84b1cstep-body h3 {
    font-size: 16px;
    color: var(--c-dark);
    margin-bottom: 8px;
}

.z84b1cstep-body p {
    font-size: 13px;
    color: var(--c-muted);
    line-height: 1.7;
}

/* ===== 核心优势 ===== */
.z84b1cfeatures {
    padding: 56px 0;
    background: var(--c-surface);
}

.z84b1cfeature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.z84b1cfeature-item {
    padding: 24px 20px;
    border: 1px solid var(--c-border);
    border-left: 3px solid var(--c-primary);
    background: var(--c-bg);
    border-radius: 0 var(--radius) var(--radius) 0;
    min-width: 0;
}

.z84b1cfeature-item h3 {
    font-size: 16px;
    color: var(--c-dark);
    margin-bottom: 10px;
}

.z84b1cfeature-item p {
    font-size: 13px;
    color: var(--c-muted);
    line-height: 1.7;
}

/* ===== 知识区 ===== */
.z84b1cknowledge {
    padding: 56px 0;
    background: var(--c-bg);
}

.z84b1cknowledge-grid {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 28px;
    align-items: start;
}

.z84b1cknowledge-main {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 32px;
    min-width: 0;
    overflow: hidden;
}

.z84b1cknowledge-main p {
    color: var(--c-muted);
    margin-bottom: 14px;
    line-height: 1.85;
    font-size: 14px;
}

.z84b1cknowledge-main p:last-child { margin-bottom: 0; }

.z84b1cknowledge-aside {
    background: var(--c-dark);
    color: #fff;
    border-radius: var(--radius);
    padding: 28px 24px;
}

.z84b1cknowledge-aside h3 {
    font-size: 16px;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
}

.z84b1cknowledge-aside ul { list-style: none; }

.z84b1cknowledge-aside li {
    font-size: 13px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    line-height: 1.6;
    opacity: 0.9;
}

.z84b1cknowledge-aside li:last-child { border-bottom: none; }

/* ===== FAQ ===== */
.z84b1cfaq {
    padding: 56px 0;
    background: var(--c-surface);
}

.z84b1cfaq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.z84b1cfaq-item {
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    background: var(--c-bg);
    overflow: hidden;
}

.z84b1cfaq-item summary {
    padding: 16px 20px;
    font-weight: 600;
    font-size: 15px;
    color: var(--c-dark);
    cursor: pointer;
    list-style: none;
}

.z84b1cfaq-item summary::-webkit-details-marker { display: none; }

.z84b1cfaq-item summary::after {
    content: "+";
    float: right;
    color: var(--c-primary);
    font-size: 18px;
}

.z84b1cfaq-item[open] summary::after { content: "−"; }

.z84b1cfaq-item p {
    padding: 0 20px 16px;
    font-size: 14px;
    color: var(--c-muted);
    line-height: 1.75;
}

/* ===== 首页文章 ===== */
.z84b1carticles {
    padding: 56px 0;
    background: var(--c-bg);
}

.z84b1chome-articles {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 18px;
}

.z84b1chome-article-item {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.z84b1chome-article-item:hover { box-shadow: var(--shadow); }

.z84b1chome-article-thumb {
    display: block;
    height: 130px;
    overflow: hidden;
    background: var(--c-border);
}

.z84b1chome-article-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.z84b1chome-article-title {
    font-size: 14px;
    padding: 12px 12px 4px;
    line-height: 1.45;
    font-weight: 600;
}

.z84b1chome-article-title a {
    color: var(--c-text);
    text-decoration: none;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.z84b1chome-article-title a:hover { color: var(--c-primary); }

.z84b1chome-article-date {
    display: block;
    font-size: 12px;
    color: var(--c-muted);
    padding: 0 12px 12px;
}

/* ===== 案例 ===== */
.z84b1ccases {
    padding: 56px 0;
    background: var(--c-surface);
}

.z84b1ccase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.z84b1ccase-card {
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 24px;
    background: var(--c-bg);
}

.z84b1ccase-tag {
    display: inline-block;
    font-size: 12px;
    padding: 2px 10px;
    background: var(--c-primary-light);
    color: var(--c-primary);
    border-radius: 12px;
    margin-bottom: 12px;
}

.z84b1ccase-card h3 {
    font-size: 17px;
    color: var(--c-dark);
    margin-bottom: 10px;
}

.z84b1ccase-card p {
    font-size: 14px;
    color: var(--c-muted);
    margin-bottom: 16px;
    line-height: 1.7;
}

.z84b1ccase-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
}

.z84b1ccase-meta li {
    font-size: 12px;
    padding: 4px 10px;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 4px;
    color: var(--c-muted);
}

/* ===== 联系 ===== */
.z84b1ccontact {
    padding: 56px 0;
    background: linear-gradient(135deg, var(--c-dark), var(--c-primary));
    color: #fff;
}

.z84b1ccontact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.z84b1ccontact-info p {
    opacity: 0.9;
    margin-bottom: 24px;
    line-height: 1.8;
}

.z84b1ccontact-list { list-style: none; }

.z84b1ccontact-list li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.15);
    font-size: 14px;
}

.z84b1ccontact-list strong {
    display: inline-block;
    min-width: 80px;
}

.z84b1ccontact-form-wrap {
    background: var(--c-surface);
    border-radius: var(--radius);
    padding: 28px;
}

.z84b1ccontact-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.z84b1cform-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.z84b1cform-full { grid-column: 1 / -1; }

.z84b1cform-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--c-dark);
}

.z84b1cform-group input,
.z84b1cform-group select,
.z84b1cform-group textarea {
    padding: 10px 12px;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    color: var(--c-text);
    background: var(--c-bg);
    width: 100%;
}

.z84b1cform-group input:focus,
.z84b1cform-group select:focus,
.z84b1cform-group textarea:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px var(--c-primary-light);
}

.z84b1cform-group textarea {
    height: 100px;
    resize: vertical;
}

.z84b1csubmit-btn {
    grid-column: 1 / -1;
    padding: 14px;
    background: var(--c-accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.z84b1csubmit-btn:hover { background: #C2410C; }

/* ===== 页脚 ===== */
.z84b1cfooter {
    background: #1C1917;
    color: #D6D3D1;
    padding: 48px 0 24px;
}

.z84b1cfooter-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 32px;
}

.z84b1cfooter-col h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 16px;
}

.z84b1cfooter-col p,
.z84b1cfooter-col li {
    font-size: 14px;
    line-height: 1.8;
    color: #A8A29E;
}

.z84b1cfooter-col ul { list-style: none; }

.z84b1cfooter-bottom {
    border-top: 1px solid #44403C;
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: #78716C;
}

.z84b1cfooter-bottom a { color: #D6D3D1; text-decoration: none; }

.z84b1cfooter-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    list-style: none;
    margin-top: 12px;
}

.z84b1cfooter-links a {
    color: #A8A29E;
    text-decoration: none;
    font-size: 13px;
}

/* ===== 内页通用 ===== */
.z84b1cpage-banner {
    padding: calc(var(--header-h) + 32px) 0 28px;
    background: linear-gradient(135deg, var(--c-dark), var(--c-primary));
    color: #fff;
}

.z84b1cpage-title {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    word-break: break-word;
}

.z84b1cbreadcrumb {
    font-size: 13px;
    opacity: 0.85;
}

.z84b1cbreadcrumb a {
    color: #fff;
    text-decoration: none;
}

.z84b1cpage-wrap { padding: 36px 0 56px; }

.z84b1cpage-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 28px;
    align-items: start;
}

.z84b1cmain-content {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 28px;
    min-width: 0;
    overflow: hidden;
}

/* ===== 列表页 ===== */
.z84b1clist-items { list-style: none; }

.z84b1clist-item {
    display: flex;
    gap: 20px;
    padding: 22px 0;
    border-bottom: 1px solid var(--c-border);
}

.z84b1clist-item:last-child { border-bottom: none; }

.z84b1clist-thumb {
    flex-shrink: 0;
    width: 200px;
    height: 140px;
    border-radius: 8px;
    overflow: hidden;
    background: var(--c-border);
}

.z84b1clist-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.z84b1clist-info { flex: 1; min-width: 0; }

.z84b1clist-title {
    font-size: 18px;
    margin-bottom: 8px;
    line-height: 1.4;
}

.z84b1clist-title a {
    color: var(--c-dark);
    text-decoration: none;
}

.z84b1clist-title a:hover { color: var(--c-primary); }

.z84b1clist-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 12px;
    color: var(--c-muted);
    margin-bottom: 10px;
}

.z84b1clist-desc {
    font-size: 14px;
    color: var(--c-muted);
    line-height: 1.7;
    margin-bottom: 10px;
    word-break: break-word;
}

.z84b1clist-more {
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    color: var(--c-primary);
}

/* ===== 分页 ===== */
.z84b1cpagebar {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--c-border);
}

.z84b1cpagelist {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    list-style: none;
    width: 100%;
}

.z84b1cpagelist li { display: inline-block; }

.z84b1cpagelist a,
.z84b1cpagelist span,
.z84b1cpagelist .page-num,
.z84b1cpagelist .thisclass {
    display: inline-block;
    padding: 7px 14px;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    font-size: 13px;
    color: var(--c-text);
    text-decoration: none;
    background: var(--c-bg);
    line-height: 1.4;
}

.z84b1cpagelist a:hover,
.z84b1cpagelist .thisclass,
.z84b1cpagelist .page-num-current {
    background: var(--c-primary);
    color: #fff;
    border-color: var(--c-primary);
}

/* ===== 内容页 ===== */
.z84b1carticle-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: var(--c-muted);
    padding-bottom: 20px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--c-border);
}

.z84b1carticle-meta a {
    color: var(--c-primary);
    text-decoration: none;
}

.z84b1carticle-thumb {
    margin-bottom: 24px;
    border-radius: 8px;
    overflow: hidden;
    max-height: 420px;
}

.z84b1carticle-thumb img {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
}

.z84b1carticle-body {
    font-size: 15px;
    line-height: 1.85;
    color: var(--c-text);
    word-break: break-word;
    overflow-wrap: break-word;
}

.z84b1carticle-body img {
    max-width: 100% !important;
    height: auto !important;
    border-radius: 6px;
    margin: 12px auto;
}

.z84b1carticle-body p { margin-bottom: 14px; }

.z84b1carticle-body table {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    display: block;
}

.z84b1cdiyfield {
    margin: 20px 0;
    padding: 16px;
    background: var(--c-bg);
    border-radius: 8px;
    font-size: 14px;
}

.z84b1carticle-figure {
    margin: 16px 0;
    text-align: center;
}

.z84b1carticle-figure img {
    border-radius: 8px;
    margin: 0 auto;
}

.z84b1carticle-figure figcaption {
    font-size: 13px;
    color: var(--c-muted);
    margin-top: 6px;
}

.z84b1cmeta-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    padding: 20px 0;
    margin: 20px 0;
    border-top: 1px solid var(--c-border);
    border-bottom: 1px solid var(--c-border);
}

.z84b1cmeta-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--c-muted);
}

.z84b1ctag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
}

.z84b1ctagitem a {
    display: inline-block;
    padding: 4px 12px;
    background: var(--c-primary-light);
    color: var(--c-primary);
    border-radius: 14px;
    font-size: 12px;
    text-decoration: none;
}

.z84b1ctagitem a:hover {
    background: var(--c-primary);
    color: #fff;
}

.z84b1carticle-nav {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--c-border);
}

.z84b1carticle-prev,
.z84b1carticle-next {
    flex: 1;
    min-width: 0;
    font-size: 14px;
    color: var(--c-muted);
    line-height: 1.6;
    word-break: break-word;
}

.z84b1carticle-prev { text-align: left; }
.z84b1carticle-next { text-align: right; }

.z84b1carticle-prev a,
.z84b1carticle-next a {
    color: var(--c-primary);
    text-decoration: none;
}

/* ===== 相关推荐 ===== */
.z84b1crelated {
    margin-top: 32px;
    padding-top: 28px;
    border-top: 2px solid var(--c-border);
}

.z84b1crelated-title {
    font-size: 18px;
    color: var(--c-dark);
    margin-bottom: 20px;
}

.z84b1crelated-list { list-style: none; }

.z84b1crelated-item {
    display: flex;
    gap: 16px;
    padding: 14px 0;
    border-bottom: 1px solid var(--c-border);
}

.z84b1crelated-item:last-child { border-bottom: none; }

.z84b1crelated-thumb {
    flex-shrink: 0;
    width: 110px;
    height: 74px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--c-border);
}

.z84b1crelated-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.z84b1crelated-info { flex: 1; min-width: 0; }

.z84b1crelated-info h3 {
    font-size: 15px;
    margin-bottom: 6px;
    line-height: 1.4;
}

.z84b1crelated-info h3 a {
    color: var(--c-dark);
    text-decoration: none;
}

.z84b1crelated-info p {
    font-size: 13px;
    color: var(--c-muted);
    line-height: 1.6;
}

/* ===== 侧栏 ===== */
.z84b1csidebar {
    position: sticky;
    top: calc(var(--header-h) + 16px);
}

.z84b1csidebar-widget {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 20px;
    overflow: hidden;
}

.z84b1csidebar-title {
    font-size: 16px;
    color: var(--c-dark);
    padding-bottom: 12px;
    margin-bottom: 12px;
    border-bottom: 2px solid var(--c-primary);
}

.z84b1csidebar-list { list-style: none; }

.z84b1csidebar-item {
    display: flex;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--c-border);
}

.z84b1csidebar-item:last-child { border-bottom: none; }

.z84b1csidebar-thumb {
    flex-shrink: 0;
    width: 64px;
    height: 48px;
    border-radius: 4px;
    overflow: hidden;
    background: var(--c-border);
}

.z84b1csidebar-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.z84b1csidebar-text { flex: 1; min-width: 0; }

.z84b1csidebar-link {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 13px;
    color: var(--c-text);
    text-decoration: none;
    line-height: 1.45;
    margin-bottom: 4px;
}

.z84b1csidebar-link:hover { color: var(--c-primary); }

.z84b1csidebar-date {
    font-size: 11px;
    color: var(--c-muted);
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .z84b1chero-grid { grid-template-columns: 1fr; }
    .z84b1chero-visual { order: -1; max-width: 480px; margin: 0 auto; }
    .z84b1chero-title { font-size: 28px; }
    .z84b1chero-stats { grid-template-columns: repeat(2, 1fr); }
    .z84b1cproduct-grid { grid-template-columns: 1fr; }
    .z84b1csteps { grid-template-columns: repeat(2, 1fr); }
    .z84b1cfeature-grid { grid-template-columns: repeat(2, 1fr); }
    .z84b1cknowledge-grid { grid-template-columns: 1fr; }
    .z84b1chome-articles { grid-template-columns: repeat(3, 1fr); }
    .z84b1ccase-grid { grid-template-columns: 1fr; }
    .z84b1ccontact-layout { grid-template-columns: 1fr; }
    .z84b1cpage-layout { grid-template-columns: 1fr; }
    .z84b1csidebar { position: static; }
    .z84b1cfooter-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .z84b1cmenu-toggle { display: block; }

    .z84b1cmain-nav {
        position: fixed;
        top: var(--header-h);
        left: 0; right: 0;
        background: var(--c-surface);
        border-bottom: 1px solid var(--c-border);
        box-shadow: 0 8px 24px rgba(0,0,0,0.1);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .z84b1cnav {
        flex-direction: column;
        align-items: stretch;
        padding: 8px 12px 16px;
    }

    .z84b1cnav-item a {
        padding: 12px 16px;
        border-bottom: 1px solid var(--c-border);
        border-radius: 0;
    }

    .z84b1csection-title { font-size: 22px; }
    .z84b1cfaq-grid { grid-template-columns: 1fr; }
    .z84b1chome-articles { grid-template-columns: repeat(2, 1fr); }
    .z84b1csteps { grid-template-columns: 1fr; }
    .z84b1cfeature-grid { grid-template-columns: 1fr; }
    .z84b1cintro-box { padding: 24px 20px; }
    .z84b1cmain-content { padding: 20px 16px; }
    .z84b1clist-item { flex-direction: column; }
    .z84b1clist-thumb { width: 100%; height: 180px; }
    .z84b1ccontact-form { grid-template-columns: 1fr; }
    .z84b1carticle-nav { flex-direction: column; }
    .z84b1carticle-next { text-align: left; }
    .z84b1crelated-item { flex-direction: column; }
    .z84b1crelated-thumb { width: 100%; height: 160px; }
    .z84b1cpagelist { justify-content: center; }
    .z84b1chero-actions { flex-direction: column; }
    .z84b1chero-actions .z84b1cbtn { text-align: center; }
}

@media (max-width: 480px) {
    .z84b1chome-articles { grid-template-columns: 1fr; }
    .z84b1chero-stats { grid-template-columns: 1fr 1fr; }
    .z84b1cpage-title { font-size: 20px; }
    .z84b1clist-meta { flex-direction: column; gap: 4px; }
}