/* 侦探官网 · 午夜蓝 + 铜橙 · 单文件 */
:root {
    --primary: #1c2541;
    --primary-light: #2d3a5c;
    --accent: #c45c26;
    --accent-hover: #a84a1c;
    --teal: #3d6b8e;
    --text: #1a1f2e;
    --muted: #5c6478;
    --bg: #eef1f6;
    --surface: #ffffff;
    --border: #d4dae6;
    --radius: 6px;
    --radius-lg: 10px;
    --shadow: 0 4px 20px rgba(28, 37, 65, 0.07);
    --header-h: 64px;
    --max: 1120px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--teal); text-decoration: none; transition: color .2s; }
ul, ol { list-style: none; }

.container, .z4cfcacontainer {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 18px;
    width: 100%;
}

/* ===== 头部 ===== */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--header-h);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: var(--header-h); gap: 12px;
}
.logo h1 { font-size: 18px; font-weight: 700; line-height: 1.3; margin: 0; }
.logo h1 a { color: var(--primary); }
.logo h1 a:hover { color: var(--accent); }

.main-nav ul.z4cfcanav {
    display: flex; flex-wrap: wrap; align-items: center;
    gap: 2px 16px;
}
.main-nav ul li a {
    font-size: 14px; font-weight: 500; color: var(--text);
    padding: 4px 0; white-space: nowrap;
}
.main-nav ul li a:hover,
.main-nav ul li.z4cfcathis a { color: var(--accent); }

.mobile-menu-btn {
    display: none; background: none; border: none;
    cursor: pointer; padding: 8px; z-index: 1001;
}
.mobile-menu-btn span {
    display: block; width: 22px; height: 2px;
    background: var(--primary); margin: 5px 0;
    transition: transform .3s, opacity .3s;
}
.mobile-menu-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(28, 37, 65, .55); z-index: 998;
}
.mobile-menu-overlay.active { display: block; }

/* ===== 按钮 ===== */
.z4cfcabtn {
    display: inline-block; padding: 11px 26px;
    font-size: 14px; font-weight: 600; border-radius: var(--radius);
    border: 2px solid transparent; text-align: center; line-height: 1.4;
}
.z4cfcabtn-main {
    background: var(--accent); color: #fff; border-color: var(--accent);
}
.z4cfcabtn-main:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.z4cfcabtn-ghost {
    background: transparent; color: #fff; border-color: rgba(255,255,255,.5);
}
.z4cfcabtn-ghost:hover { background: rgba(255,255,255,.1); color: #fff; }
.z4cfcabtn-line {
    background: transparent; color: var(--primary);
    border-color: var(--primary);
}
.z4cfcabtn-line:hover { background: var(--primary); color: #fff; }
.z4cfcabtn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.z4cfcabtn-primary:hover { background: var(--accent-hover); color: #fff; }
.z4cfcabtn-outline-dark,
.z4cfcabtn-outline {
    background: transparent; color: var(--primary); border: 2px solid var(--primary);
}
.z4cfcabtn-outline-dark:hover,
.z4cfcabtn-outline:hover { background: var(--primary); color: #fff; }

/* ===== 版块标题 ===== */
.z4cfcasec-hd { margin-bottom: 32px; }
.z4cfcasec-hd--c { text-align: center; }
.z4cfcasec-hd h2 {
    font-size: 26px; color: var(--primary); font-weight: 700;
    margin-top: 8px; line-height: 1.35;
}
.z4cfcasec-hd p { color: var(--muted); margin-top: 8px; font-size: 15px; }
.z4cfcatag {
    display: inline-block; font-size: 12px; font-weight: 600;
    letter-spacing: .06em; color: var(--accent);
    background: rgba(196, 92, 38, .1); padding: 3px 10px; border-radius: 3px;
}
.z4cfcasection-head { margin-bottom: 32px; }
.z4cfcasection-head--center { text-align: center; }
.z4cfcasection-head h2 { font-size: 26px; color: var(--primary); margin: 8px 0; }
.z4cfcalabel {
    display: inline-block; font-size: 12px; font-weight: 600;
    color: var(--accent); background: rgba(196, 92, 38, .1);
    padding: 3px 10px; border-radius: 3px;
}

/* ===== 首页 Hero ===== */
.z4cfcahome { padding-top: var(--header-h); }

.z4cfcahero {
    background: linear-gradient(160deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff; padding: 48px 0 0;
}
.z4cfcahero .z4cfcacontainer {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 36px; align-items: center; padding-bottom: 40px;
}
.z4cfcahero-eyebrow {
    font-size: 13px; color: rgba(255,255,255,.75); margin-bottom: 12px;
}
.z4cfcahero-title, .z4cfcahero-text h2 {
    font-size: 32px; line-height: 1.3; font-weight: 700; margin-bottom: 14px;
}
.z4cfcahero-desc, .z4cfcahero-lead {
    font-size: 16px; opacity: .92; margin-bottom: 12px;
}
.z4cfcahero-sub, .z4cfcahero-text p {
    font-size: 14px; opacity: .82; line-height: 1.75; margin-bottom: 22px;
}
.z4cfcahero-btns, .z4cfcahero-actions {
    display: flex; flex-wrap: wrap; gap: 12px;
}
.z4cfcahero-media, .z4cfcahero-visual {
    display: flex; justify-content: center;
}
.z4cfcahero-img {
    border-radius: var(--radius-lg);
    box-shadow: 0 16px 48px rgba(0,0,0,.28);
    max-width: 100%;
}

.z4cfcatrust-bar, .z4cfcastats-row {
    display: grid; grid-template-columns: repeat(4, 1fr);
    background: rgba(0,0,0,.2); border-top: 1px solid rgba(255,255,255,.1);
    max-width: var(--max); margin: 0 auto;
}
.z4cfcatrust-bar li, .z4cfcastat {
    text-align: center; padding: 18px 12px;
}
.z4cfcatrust-bar b, .z4cfcastat strong {
    display: block; font-size: 18px; color: #f0a070; margin-bottom: 2px;
}
.z4cfcatrust-bar span, .z4cfcastat span { font-size: 12px; opacity: .85; }

/* ===== 简介带 ===== */
.z4cfcaband, .z4cfcaintro {
    padding: 56px 0; background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.z4cfcaband-grid, .z4cfcaintro-inner {
    display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: start;
}
.z4cfcaband-text h2, .z4cfcaintro-cols + .z4cfcasection-head h2 {
    font-size: 22px; color: var(--primary); margin-bottom: 16px;
}
.z4cfcaband-text p, .z4cfcaintro-cols p {
    color: var(--muted); font-size: 15px; line-height: 1.8; margin-bottom: 14px;
}
.z4cfcaband-points { display: flex; flex-direction: column; gap: 10px; }
.z4cfcaband-points li {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 16px; background: var(--bg);
    border: 1px solid var(--border); border-radius: var(--radius);
    font-weight: 600; color: var(--primary); font-size: 14px;
}
.z4cfcaband-points span {
    width: 28px; height: 28px; background: var(--accent); color: #fff;
    border-radius: 50%; font-size: 12px;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}

/* ===== 业务四列 ===== */
.z4cfcaservices { padding: 56px 0; }
.z4cfcasvc-row, .z4cfcasvc-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.z4cfcasvc, .z4cfcasvc-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 22px 18px;
    box-shadow: var(--shadow); height: 100%;
}
.z4cfcasvc-icon {
    width: 40px; height: 40px; background: var(--primary); color: #fff;
    border-radius: var(--radius); display: flex; align-items: center;
    justify-content: center; font-size: 16px; font-weight: 700; margin-bottom: 14px;
}
.z4cfcasvc h3, .z4cfcasvc-card h3 {
    font-size: 16px; color: var(--primary); margin-bottom: 10px; line-height: 1.4;
}
.z4cfcasvc p, .z4cfcasvc-card p {
    font-size: 13px; color: var(--muted); line-height: 1.7;
}
.z4cfcasvc-card--main { grid-column: span 1; border-color: var(--accent); border-width: 2px; }
.z4cfcasvc-num { font-size: 12px; color: var(--accent); font-weight: 700; margin-bottom: 8px; }
.z4cfcasvc-list { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.z4cfcasvc-list li { font-size: 13px; padding: 4px 0 4px 14px; position: relative; }
.z4cfcasvc-list li::before {
    content: ""; position: absolute; left: 0; top: 11px;
    width: 5px; height: 5px; background: var(--accent); border-radius: 50%;
}

/* ===== 优势 ===== */
.z4cfcaadvantages { padding: 56px 0; background: var(--bg); }
.z4cfcapromise, .z4cfcaadv-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
}
.z4cfcapromise-item, .z4cfcaadv-item {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 22px 24px;
    border-top: 3px solid var(--accent);
}
.z4cfcapromise-item h3, .z4cfcaadv-item h3 {
    font-size: 16px; color: var(--primary); margin-bottom: 8px;
}
.z4cfcapromise-item p, .z4cfcaadv-item p {
    font-size: 14px; color: var(--muted); line-height: 1.7;
}

/* ===== 行业知识 ===== */
.z4cfcaknowledge { padding: 56px 0; }
.z4cfcaknow-list, .z4cfcaknow-grid {
    display: flex; flex-direction: column; gap: 10px;
}
.z4cfcaknow, .z4cfcaknow-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); overflow: hidden;
}
.z4cfcaknow summary, .z4cfcaknow-card h3 {
    padding: 16px 20px; font-size: 15px; font-weight: 600;
    color: var(--primary); cursor: pointer; list-style: none;
}
.z4cfcaknow summary::-webkit-details-marker { display: none; }
.z4cfcaknow[open] summary { border-bottom: 1px solid var(--border); background: var(--bg); }
.z4cfcaknow p, .z4cfcaknow-card p {
    padding: 14px 20px 18px; font-size: 14px; color: var(--muted); line-height: 1.75;
}

/* ===== 流程 FAQ ===== */
.z4cfcaprocess { padding: 56px 0; background: var(--surface); }
.z4cfcasteps, .z4cfcaflow {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
    margin-bottom: 36px; counter-reset: step;
}
.z4cfcasteps li, .z4cfcaflow-step {
    padding: 20px 16px; background: var(--bg);
    border: 1px solid var(--border); border-radius: var(--radius-lg);
    text-align: center;
}
.z4cfcasteps strong, .z4cfcaflow-step h3 {
    display: block; font-size: 15px; color: var(--primary); margin-bottom: 6px;
}
.z4cfcasteps span, .z4cfcaflow-step p {
    font-size: 13px; color: var(--muted); line-height: 1.6;
}
.z4cfcaflow-n {
    display: inline-flex; width: 32px; height: 32px;
    background: var(--accent); color: #fff; border-radius: 50%;
    align-items: center; justify-content: center;
    font-weight: 700; font-size: 14px; margin-bottom: 10px;
}

.z4cfcafaq {
    padding: 24px 28px; background: var(--bg);
    border: 1px solid var(--border); border-radius: var(--radius-lg);
    margin-bottom: 40px;
}
.z4cfcafaq h3, .z4cfcafaq-title {
    font-size: 17px; color: var(--primary); margin-bottom: 16px; text-align: center;
}
.z4cfcafaq dt, .z4cfcafaq-list dt {
    font-weight: 600; color: var(--primary); font-size: 14px;
    padding: 12px 0 6px; border-top: 1px solid var(--border);
}
.z4cfcafaq dt:first-child, .z4cfcafaq-list dt:first-child { border-top: none; padding-top: 0; }
.z4cfcafaq dd, .z4cfcafaq-list dd {
    font-size: 14px; color: var(--muted); padding-bottom: 12px; line-height: 1.7;
}

/* ===== 首页资讯 ===== */
.z4cfcaarticles-home {
    padding: 36px 0 0; border-top: 1px solid var(--border);
}
.z4cfcaarticles-home--inprocess { padding-top: 36px; margin-top: 0; border-top: 1px solid var(--border); }
.z4cfcaarticles-grid {
    display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px;
}
.z4cfcaarticle-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); overflow: hidden;
    transition: transform .2s, box-shadow .2s;
}
.z4cfcaarticle-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.z4cfcaarticle-thumb {
    display: block; aspect-ratio: 4/3; overflow: hidden; background: var(--bg);
}
.z4cfcaarticle-thumb img { width: 100%; height: 100%; object-fit: cover; }
.z4cfcaarticle-card-body {
    padding: 10px 12px 12px;
}
.z4cfcaarticle-card-body h3,
.z4cfcaarticle-card-title {
    font-size: 13px; font-weight: 600; margin: 0 0 4px; line-height: 1.45;
}
.z4cfcaarticle-card-body h3 a,
.z4cfcaarticle-card-title a {
    color: var(--text); display: -webkit-box;
    -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.z4cfcaarticle-card-body h3 a:hover,
.z4cfcaarticle-card-title a:hover { color: var(--accent); }
.z4cfcaarticle-card-body time,
.z4cfcaarticle-card-meta { font-size: 11px; color: var(--muted); }
.z4cfcaarticles-more { text-align: center; margin-top: 28px; }

/* ===== 联系 ===== */
.z4cfcacontact {
    padding: 56px 0 64px;
    background: linear-gradient(180deg, var(--bg) 0%, #dde3ed 100%);
}
.z4cfcacontact-wrap, .z4cfcacontact .z4cfcacontainer { }
.z4cfcacontact-cards, .z4cfcacontact-grid {
    display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 16px;
}
.z4cfcac-card, .z4cfcacontact-box {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 24px 20px; text-align: center;
}
.z4cfcac-card h3, .z4cfcacontact-box h3 {
    font-size: 15px; color: var(--primary); margin-bottom: 10px;
}
.z4cfcac-card p, .z4cfcacontact-box p { font-size: 14px; color: var(--muted); margin-bottom: 6px; }
.z4cfcac-card--main, .z4cfcacontact-box--hot {
    border-color: var(--accent); border-width: 2px;
}
.z4cfcatel, .z4cfcaphone {
    font-size: 24px; font-weight: 700; color: var(--primary) !important;
    margin: 8px 0 14px !important;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--primary); color: rgba(255,255,255,.72);
    padding: 32px 0 24px; font-size: 13px;
}
.footer .container { text-align: center; }
.footer a { color: rgba(255,255,255,.92); }
.footer a:hover { color: #f0a070; }
.footer-links, .flink_list {
    display: flex; flex-wrap: wrap; justify-content: center;
    gap: 10px 18px; margin-bottom: 14px; padding: 0;
}
.flink_title { font-size: 12px; opacity: .65; margin-bottom: 8px; }
.z4cfcaflink { margin-bottom: 18px; }
.footer p { margin: 5px 0; }

/* ===== 子页面 ===== */
.z4cfcasubpage { padding-top: var(--header-h); }

.z4cfcapage-banner {
    background: var(--primary); color: #fff;
    padding: 32px 0 28px;
}
.z4cfcapage-title {
    font-size: 24px; font-weight: 700; margin-bottom: 8px;
    line-height: 1.35; word-break: break-word;
}
.z4cfcabreadcrumb { font-size: 13px; opacity: .85; }
.z4cfcabreadcrumb a { color: #fff; }
.z4cfcabreadcrumb-sep { margin: 0 6px; opacity: .5; }

.z4cfcapage-main { padding: 28px 0 44px; }

.z4cfcapage-layout {
    display: grid; grid-template-columns: minmax(0, 1fr) 268px;
    gap: 22px; align-items: start;
}

.z4cfcacontent-main {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 24px;
    min-width: 0; overflow: hidden;
}

/* 列表 */
.z4cfcalist-item {
    display: flex; gap: 18px; padding: 20px 0;
    border-bottom: 1px solid var(--border);
    align-items: flex-start;
}
.z4cfcalist-item:last-child { border-bottom: none; padding-bottom: 0; }
.z4cfcalist-item:first-child { padding-top: 0; }

.z4cfcalist-thumb {
    flex: 0 0 190px; width: 190px; max-width: 38%;
    border-radius: var(--radius); overflow: hidden;
    border: 1px solid var(--border);
}
.z4cfcalist-thumb img { width: 100%; height: 128px; object-fit: cover; }

.z4cfcalist-body { flex: 1; min-width: 0; }
.z4cfcalist-title { font-size: 17px; margin: 0 0 8px; line-height: 1.4; }
.z4cfcalist-title a { color: var(--text); }
.z4cfcalist-title a:hover { color: var(--accent); }
.z4cfcalist-meta {
    font-size: 12px; color: var(--muted); margin-bottom: 8px;
    display: flex; flex-wrap: wrap; gap: 10px 14px;
}
.z4cfcalist-meta a { color: var(--teal); }
.z4cfcalist-intro {
    font-size: 14px; color: var(--muted); line-height: 1.65;
    word-break: break-word;
}

/* 分页左右 */
.z4cfcapagebar { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
.z4cfcapages-lr {
    display: grid; grid-template-columns: 1fr auto 1fr;
    align-items: center; gap: 10px; width: 100%;
}
.z4cfcapage-left .pagelist { justify-content: flex-start; }
.z4cfcapage-center .pagelist { justify-content: center; }
.z4cfcapage-right .pagelist { justify-content: flex-end; }
.z4cfcapages-lr .pagelist {
    display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0;
}
.z4cfcapages-lr .pagelist a,
.z4cfcapages-lr .pagelist span {
    display: inline-block; padding: 6px 12px;
    border: 1px solid var(--border); border-radius: var(--radius);
    font-size: 13px; color: var(--text); background: var(--surface);
}
.z4cfcapages-lr .pagelist a:hover { border-color: var(--accent); color: var(--accent); }
.z4cfcapages-lr .pagelist .thisclass a,
.z4cfcapages-lr .pagelist .thisclass {
    background: var(--primary); border-color: var(--primary); color: #fff;
}

/* 侧栏 */
.z4cfcasidebar { display: flex; flex-direction: column; gap: 18px; min-width: 0; }
.z4cfcasidebar-block {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 18px; overflow: hidden;
}
.z4cfcasidebar-title {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 14px; padding-bottom: 10px;
    border-bottom: 2px solid var(--accent);
}
.z4cfcasidebar-title h3 { font-size: 15px; margin: 0; }
.z4cfcasidebar-title h3 a { color: var(--primary); }
.z4cfcasidebar-more { font-size: 12px; color: var(--accent); flex-shrink: 0; }
.z4cfcasidebar-link {
    display: flex; gap: 10px; padding: 9px 0;
    text-decoration: none; align-items: flex-start;
}
.z4cfcasidebar-item { border-bottom: 1px solid var(--border); }
.z4cfcasidebar-item:last-child { border-bottom: none; }
.z4cfcasidebar-thumb {
    flex: 0 0 68px; width: 68px; height: 51px;
    border-radius: 4px; overflow: hidden; border: 1px solid var(--border);
}
.z4cfcasidebar-thumb img { width: 100%; height: 100%; object-fit: cover; }
.z4cfcasidebar-info { flex: 1; min-width: 0; }
.z4cfcasidebar-item-title {
    font-size: 13px; color: var(--text); line-height: 1.4;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.z4cfcasidebar-link:hover .z4cfcasidebar-item-title { color: var(--accent); }
.z4cfcasidebar-date { font-size: 11px; color: var(--muted); margin-top: 3px; display: block; }

/* 内容页 */
.z4cfcaarticle-header {
    margin-bottom: 20px; padding-bottom: 18px;
    border-bottom: 1px solid var(--border);
}
.z4cfcaarticle-title {
    font-size: 22px; color: var(--primary); line-height: 1.4;
    margin: 0 0 12px; word-break: break-word;
}
.z4cfcaarticle-meta {
    font-size: 13px; color: var(--muted);
    display: flex; flex-wrap: wrap; gap: 10px 18px;
}
.z4cfcaarticle-meta a { color: var(--teal); }
.z4cfcaarticle-litpic { margin-top: 14px; text-align: center; }
.z4cfcaarticle-litpic img {
    max-width: 100%; border-radius: var(--radius);
    border: 1px solid var(--border);
}
.z4cfcaarticle-content {
    font-size: 16px; line-height: 1.85; word-break: break-word;
    overflow-wrap: break-word;
}
.z4cfcaarticle-content img { max-width: 100%; height: auto; margin: 10px 0; border-radius: var(--radius); }
.z4cfcaarticle-content table { max-width: 100%; display: block; overflow-x: auto; }
.z4cfcaarticle-gallery-item { margin: 16px 0; text-align: center; }
.z4cfcaarticle-gallery-item img { max-width: 100%; border-radius: var(--radius); border: 1px solid var(--border); }
.z4cfcaarticle-gallery-item figcaption { font-size: 13px; color: var(--muted); margin-top: 6px; }
.z4cfcadiyfield {
    margin: 18px 0; padding: 14px; background: var(--bg);
    border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.z4cfcameta-tags {
    display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 0; list-style: none;
}
.z4cfcatagitem a {
    display: inline-block; padding: 4px 12px; font-size: 12px;
    background: rgba(28,37,65,.08); color: var(--primary); border-radius: 20px;
}
.z4cfcatagitem a:hover { background: var(--primary); color: #fff; }
.z4cfcameta-tags .clear { display: none; }

.z4cfcaarticle-prenext {
    margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--border);
    display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px;
}
.z4cfcaprenext-pre, .z4cfcaprenext-next {
    flex: 1; min-width: 180px; font-size: 14px; color: var(--muted); line-height: 1.65;
}
.z4cfcaprenext-pre a, .z4cfcaprenext-next a { color: var(--teal); }

.z4cfcarelated { margin-top: 24px; padding-top: 20px; border-top: 2px solid var(--border); }
.z4cfcarelated-title { font-size: 17px; color: var(--primary); margin-bottom: 16px; }
.z4cfcarelated-item {
    display: flex; gap: 12px; padding: 12px 0;
    border-bottom: 1px solid var(--border); align-items: flex-start;
}
.z4cfcarelated-item:last-child { border-bottom: none; }
.z4cfcarelated-thumb {
    flex: 0 0 96px; width: 96px; border-radius: var(--radius);
    overflow: hidden; border: 1px solid var(--border);
}
.z4cfcarelated-thumb img { width: 100%; height: 64px; object-fit: cover; }
.z4cfcarelated-body { flex: 1; min-width: 0; }
.z4cfcarelated-body h3 { font-size: 14px; margin: 0 0 5px; line-height: 1.4; }
.z4cfcarelated-body h3 a { color: var(--text); }
.z4cfcarelated-body h3 a:hover { color: var(--accent); }
.z4cfcarelated-body p { font-size: 13px; color: var(--muted); line-height: 1.55; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .z4cfcaarticles-grid { grid-template-columns: repeat(4, 1fr); }
    .z4cfcasvc-row, .z4cfcasvc-grid { grid-template-columns: repeat(2, 1fr); }
    .z4cfcasteps, .z4cfcaflow { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
    .z4cfcahero .z4cfcacontainer,
    .z4cfcahero-grid { grid-template-columns: 1fr; text-align: center; }
    .z4cfcahero-btns, .z4cfcahero-actions { justify-content: center; }
    .z4cfcahero-media { order: -1; }
    .z4cfcahero-img { max-width: 320px; margin: 0 auto; }

    .z4cfcaband-grid, .z4cfcaintro-inner { grid-template-columns: 1fr; }
    .z4cfcapromise, .z4cfcaadv-grid { grid-template-columns: 1fr; }
    .z4cfcacontact-cards, .z4cfcacontact-grid { grid-template-columns: 1fr; }
    .z4cfcapage-layout { grid-template-columns: 1fr; }
    .z4cfcaarticles-grid { grid-template-columns: repeat(3, 1fr); }
    .z4cfcatrust-bar, .z4cfcastats-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    :root { --header-h: 56px; }
    .mobile-menu-btn { display: block; }
    .mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
    .mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

    .main-nav {
        position: fixed; top: 0; right: -100%;
        width: min(280px, 88vw); height: 100vh;
        background: var(--surface); padding: 70px 18px 24px;
        box-shadow: -4px 0 24px rgba(0,0,0,.15);
        overflow-y: auto; z-index: 999; transition: right .3s;
    }
    .main-nav.active { right: 0; }
    .main-nav ul.z4cfcanav { flex-direction: column; align-items: stretch; gap: 0; }
    .main-nav ul li { border-bottom: 1px solid var(--border); }
    .main-nav ul li a { display: block; padding: 13px 0; font-size: 15px; }

    .z4cfcahero-title, .z4cfcahero-text h2 { font-size: 24px; }
    .z4cfcasec-hd h2, .z4cfcasection-head h2 { font-size: 22px; }
    .z4cfcasvc-row, .z4cfcasvc-grid { grid-template-columns: 1fr; }
    .z4cfcasteps, .z4cfcaflow { grid-template-columns: 1fr; }
    .z4cfcaarticles-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .z4cfcacontent-main { padding: 18px 14px; }
    .z4cfcalist-item { flex-direction: column; }
    .z4cfcalist-thumb { flex: none; width: 100%; max-width: 100%; }
    .z4cfcalist-thumb img { height: auto; min-height: 150px; max-height: 200px; }
    .z4cfcapages-lr { grid-template-columns: 1fr; gap: 8px; }
    .z4cfcapage-left .pagelist,
    .z4cfcapage-center .pagelist,
    .z4cfcapage-right .pagelist { justify-content: center; }
    .z4cfcarelated-item { flex-direction: column; }
    .z4cfcarelated-thumb { width: 100%; }
    .z4cfcarelated-thumb img { height: auto; min-height: 130px; }
    .z4cfcafaq { padding: 18px 16px; }
    .z4cfcaprenext-pre, .z4cfcaprenext-next { min-width: 100%; }
}

@media (max-width: 480px) {
    .container, .z4cfcacontainer { padding: 0 14px; }
    .z4cfcaarticles-grid { grid-template-columns: 1fr; }
    .z4cfcahero-btns { flex-direction: column; align-items: center; }
    .z4cfcabtn { max-width: 260px; width: 100%; }
    .z4cfcatel, .z4cfcaphone { font-size: 20px; }
    .z4cfcasidebar-thumb { flex: 0 0 60px; width: 60px; height: 45px; }
}