/* ===== 设计变量 · 深海青绿官网风 ===== */
:root {
    --c-primary: #0f2b46;
    --c-primary-light: #1a3f5c;
    --c-accent: #00897b;
    --c-accent-hover: #00695c;
    --c-highlight: #5c6bc0;
    --c-bg: #eef2f6;
    --c-surface: #ffffff;
    --c-dark: #0a1929;
    --c-text: #1a2332;
    --c-muted: #5a6778;
    --c-border: #d4dbe3;
    --c-border-light: #e8edf2;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(15,43,70,.06);
    --shadow-md: 0 4px 16px rgba(15,43,70,.08);
    --shadow-lg: 0 8px 32px rgba(15,43,70,.12);
    --transition: .25s ease;
    --header-h: 64px;
    --topbar-h: 36px;
    --container: 1140px;
}

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

html { scroll-behavior: smooth; }

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

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

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

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

/* ===== 顶部条 ===== */
.top-bar {
    background: var(--c-dark);
    color: rgba(255,255,255,.75);
    font-size: 13px;
    height: var(--topbar-h);
    display: flex;
    align-items: center;
}

.top-bar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.top-bar-phone strong { color: var(--c-accent); font-weight: 600; }

/* ===== 头部导航 ===== */
.site-header {
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border-light);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-h);
    transition: box-shadow var(--transition);
}

.site-header.is-scrolled { box-shadow: var(--shadow-md); }

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

.site-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--c-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 220px;
    flex-shrink: 0;
}

.site-logo:hover { color: var(--c-accent); }

.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-list > li > a {
    display: block;
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--c-text);
    border-radius: 6px;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-list > li > a:hover { color: var(--c-accent); background: rgba(0,137,123,.06); }

.nav-list .z8caa6this > a,
.nav-list li.z8caa6this > a {
    color: var(--c-accent);
    background: rgba(0,137,123,.08);
}

.btn-cta {
    display: inline-block;
    padding: 8px 20px !important;
    background: var(--c-accent) !important;
    color: #fff !important;
    border-radius: 6px !important;
    font-weight: 600 !important;
}

.btn-cta:hover { background: var(--c-accent-hover) !important; color: #fff !important; }

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    flex-shrink: 0;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--c-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.menu-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.is-active span:nth-child(2) { opacity: 0; }
.menu-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 按钮 ===== */
.btn-primary {
    display: inline-block;
    padding: 12px 28px;
    background: var(--c-accent);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover { background: var(--c-accent-hover); transform: translateY(-1px); }

.btn-outline {
    display: inline-block;
    padding: 11px 28px;
    border: 2px solid rgba(255,255,255,.5);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius);
    transition: var(--transition);
}

.btn-outline:hover { background: rgba(255,255,255,.12); border-color: #fff; }

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

/* ===== 通用区块 ===== */
.section { padding: 72px 0; }

.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }

.section-head h2 {
    font-size: 28px;
    color: var(--c-primary);
    margin-bottom: 12px;
    font-weight: 700;
}

.section-head p { color: var(--c-muted); font-size: 15px; }

.section-head-light h2,
.section-head-light p { color: rgba(255,255,255,.92); }

.section-head-light .section-tag { background: rgba(255,255,255,.15); color: #fff; }

.section-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--c-accent);
    background: rgba(0,137,123,.1);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.section-tag-light { background: rgba(255,255,255,.15); color: #fff; }

/* ===== 首屏 ===== */
.hero {
    background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 50%, #1a5276 100%);
    color: #fff;
    padding: 64px 0 72px;
}

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

.hero-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    padding: 5px 14px;
    border: 1px solid rgba(255,255,255,.3);
    border-radius: 20px;
    margin-bottom: 20px;
    color: rgba(255,255,255,.9);
}

.hero-text h1 {
    font-size: 36px;
    line-height: 1.35;
    font-weight: 700;
    margin-bottom: 20px;
}

.hero-lead {
    font-size: 15px;
    line-height: 1.8;
    color: rgba(255,255,255,.82);
    margin-bottom: 28px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

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

.hero-stat {
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    text-align: center;
}

.hero-stat strong {
    display: block;
    font-size: 32px;
    font-weight: 700;
    color: #4db6ac;
    margin-bottom: 6px;
}

.hero-stat span { font-size: 13px; color: rgba(255,255,255,.7); }

/* ===== 服务卡片 ===== */
.section-services { background: var(--c-surface); }

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

.svc-card {
    padding: 28px;
    border: 1px solid var(--c-border-light);
    border-radius: var(--radius-lg);
    background: var(--c-surface);
    transition: var(--transition);
}

.svc-card:hover {
    border-color: var(--c-accent);
    box-shadow: var(--shadow-md);
}

.svc-num {
    font-size: 13px;
    font-weight: 700;
    color: var(--c-accent);
    margin-bottom: 12px;
}

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

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

/* ===== 流程 ===== */
.section-process {
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
    color: #fff;
}

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

.flow-item {
    text-align: center;
    padding: 24px 16px;
    border: 1px solid rgba(255,255,255,.12);
    border-radius: var(--radius-lg);
    background: rgba(255,255,255,.05);
}

.flow-icon {
    width: 44px;
    height: 44px;
    line-height: 44px;
    margin: 0 auto 14px;
    background: var(--c-accent);
    color: #fff;
    font-weight: 700;
    font-size: 18px;
    border-radius: 50%;
}

.flow-item h3 { font-size: 15px; margin-bottom: 8px; }

.flow-item p { font-size: 13px; color: rgba(255,255,255,.72); line-height: 1.65; }

/* ===== 知识百科 ===== */
.section-knowledge { background: var(--c-bg); }

.knowledge-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 24px;
    align-items: start;
}

.knowledge-main { display: flex; flex-direction: column; gap: 20px; }

.knowledge-block {
    background: var(--c-surface);
    border: 1px solid var(--c-border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
}

.knowledge-block h3 {
    font-size: 17px;
    color: var(--c-primary);
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--c-border-light);
}

.knowledge-block p {
    font-size: 14px;
    color: var(--c-muted);
    margin-bottom: 12px;
    line-height: 1.8;
}

.knowledge-block p:last-child { margin-bottom: 0; }

.knowledge-block strong { color: var(--c-text); }

.knowledge-aside { display: flex; flex-direction: column; gap: 16px; }

.tip-box {
    background: var(--c-surface);
    border: 1px solid var(--c-border-light);
    border-radius: var(--radius-lg);
    padding: 22px;
}

.tip-box h4 {
    font-size: 15px;
    color: var(--c-primary);
    margin-bottom: 12px;
}

.tip-box ul li {
    font-size: 13px;
    color: var(--c-muted);
    padding: 6px 0 6px 16px;
    position: relative;
    line-height: 1.6;
}

.tip-box ul li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 13px;
    width: 6px;
    height: 6px;
    background: var(--c-accent);
    border-radius: 50%;
}

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

.tip-box-accent h4 { color: #4db6ac; }

.tip-box-accent p { font-size: 13px; color: rgba(255,255,255,.8); line-height: 1.7; }

/* ===== 优势 ===== */
.section-advantages { background: var(--c-surface); }

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

.adv-item {
    padding: 24px;
    border-left: 3px solid var(--c-accent);
    background: var(--c-bg);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.adv-item h3 { font-size: 15px; color: var(--c-primary); margin-bottom: 8px; }

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

/* ===== 关于 ===== */
.section-about { background: var(--c-bg); }

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: center;
}

.about-content h2 { font-size: 26px; color: var(--c-primary); margin-bottom: 16px; }

.about-content p { font-size: 14px; color: var(--c-muted); margin-bottom: 14px; line-height: 1.8; }

.about-list { margin-top: 20px; }

.about-list li {
    font-size: 14px;
    color: var(--c-text);
    padding: 8px 0 8px 22px;
    position: relative;
}

.about-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--c-accent);
    font-weight: 700;
}

.about-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.metric {
    background: var(--c-surface);
    border: 1px solid var(--c-border-light);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
}

.metric strong {
    display: block;
    font-size: 28px;
    color: var(--c-accent);
    font-weight: 700;
    margin-bottom: 4px;
}

.metric span { font-size: 13px; color: var(--c-muted); }

/* ===== 文章板块 ===== */
.section-articles { background: var(--c-surface); }

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

.article-card {
    border: 1px solid var(--c-border-light);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--c-surface);
    transition: var(--transition);
}

.article-card:hover {
    border-color: var(--c-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.article-card-thumb {
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--c-bg);
}

.article-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.article-card-body { padding: 12px 14px; }

.article-card-body h3 {
    font-size: 13px;
    line-height: 1.5;
    margin-bottom: 6px;
    font-weight: 600;
}

.article-card-body h3 a {
    color: var(--c-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-body h3 a:hover { color: var(--c-accent); }

.article-card-date { font-size: 12px; color: var(--c-muted); }

/* ===== 联系 ===== */
.section-contact {
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
    color: #fff;
}

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

.contact-info h2 { font-size: 26px; margin-bottom: 14px; }

.contact-info > p { font-size: 14px; color: rgba(255,255,255,.78); margin-bottom: 24px; line-height: 1.8; }

.contact-list li {
    display: flex;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,.1);
    font-size: 14px;
}

.contact-label { color: rgba(255,255,255,.6); min-width: 72px; }

.contact-val { color: #fff; font-weight: 500; }

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

.contact-form .form-row { margin-bottom: 14px; }

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--c-text);
    background: var(--c-surface);
    transition: border-color var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--c-accent);
}

.contact-form textarea { height: 110px; resize: vertical; }

/* ===== 页脚 ===== */
.site-footer {
    background: var(--c-dark);
    color: rgba(255,255,255,.7);
    padding: 48px 0 24px;
}

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

.footer-col h4 {
    color: #fff;
    font-size: 15px;
    margin-bottom: 16px;
}

.footer-col li { margin-bottom: 8px; font-size: 13px; }

.footer-col a { color: rgba(255,255,255,.65); transition: var(--transition); }

.footer-col a:hover { color: #4db6ac; }

.footer-copy {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,.08);
    font-size: 13px;
}

.footer-copy .copyright { margin-top: 6px; color: rgba(255,255,255,.4); font-size: 12px; }

/* ===== 内页通用 ===== */
.page-breadcrumb {
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border-light);
    padding: 12px 0;
    font-size: 13px;
    color: var(--c-muted);
}

.page-breadcrumb a { color: var(--c-muted); transition: var(--transition); }

.page-breadcrumb a:hover { color: var(--c-accent); }

.page-breadcrumb .sep { margin: 0 8px; color: var(--c-border); }

.page-breadcrumb .current { color: var(--c-text); }

.page-title-bar {
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
    color: #fff;
    padding: 36px 0;
    text-align: center;
}

.page-title-bar h1 { font-size: 26px; margin-bottom: 8px; }

.page-title-bar .page-desc {
    font-size: 14px;
    color: rgba(255,255,255,.75);
    max-width: 600px;
    margin: 0 auto;
}

.page-main { padding: 32px 0 64px; }

.page-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 24px;
    align-items: start;
}

.page-content {
    background: var(--c-surface);
    border: 1px solid var(--c-border-light);
    border-radius: var(--radius-lg);
    padding: 28px;
    min-width: 0;
}

.section-header-left { margin-bottom: 24px; }

.section-header-left h2 { font-size: 20px; color: var(--c-primary); }

/* ===== 列表页 ===== */
.article-list-item { border-bottom: 1px solid var(--c-border-light); }

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

.list-item-link {
    display: flex;
    gap: 18px;
    padding: 18px 0;
    color: inherit;
    transition: var(--transition);
}

.list-item-link:hover { background: rgba(0,137,123,.03); margin: 0 -12px; padding-left: 12px; padding-right: 12px; border-radius: var(--radius); }

.list-item-thumb {
    flex-shrink: 0;
    width: 180px;
    height: 120px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--c-border-light);
    background: var(--c-bg);
}

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

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

.list-item-title {
    font-size: 16px;
    color: var(--c-primary);
    margin-bottom: 8px;
    line-height: 1.45;
    transition: var(--transition);
}

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

.list-item-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 12px;
    color: var(--c-muted);
    margin-bottom: 8px;
}

.list-item-meta .meta-cat { color: var(--c-highlight); }

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

/* 翻页 */
.pagebar {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--c-border-light);
}

.pagebar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.pagebar-left, .pagebar-right { flex-shrink: 0; }

.pagebar-center { flex: 1; display: flex; justify-content: center; min-width: 0; }

.pagebar-left .pagelist,
.pagebar-center .pagelist,
.pagebar-right .pagelist {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    list-style: none;
    align-items: center;
}

.pagebar-left .pagelist { justify-content: flex-start; }
.pagebar-center .pagelist { justify-content: center; }
.pagebar-right .pagelist { justify-content: flex-end; }

.pagebar-left .pagelist a,
.pagebar-left .pagelist span,
.pagebar-center .pagelist a,
.pagebar-center .pagelist span,
.pagebar-right .pagelist a,
.pagebar-right .pagelist span {
    display: inline-block;
    padding: 7px 12px;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    font-size: 13px;
    color: var(--c-text);
    background: var(--c-surface);
    transition: var(--transition);
    white-space: nowrap;
}

.pagebar-left .pagelist a:hover,
.pagebar-center .pagelist a:hover,
.pagebar-right .pagelist a:hover,
.pagebar-left .pagelist .thisclass,
.pagebar-center .pagelist .thisclass,
.pagebar-right .pagelist .thisclass {
    background: var(--c-accent);
    border-color: var(--c-accent);
    color: #fff;
}

/* ===== 内容页 ===== */
.article-header {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--c-border-light);
}

.article-title { font-size: 24px; color: var(--c-primary); line-height: 1.4; margin-bottom: 14px; }

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: var(--c-muted);
}

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

.article-thumb {
    margin-bottom: 24px;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--c-border-light);
}

.article-body { font-size: 15px; line-height: 1.85; word-wrap: break-word; }

.article-body img { max-width: 100%; border-radius: var(--radius); margin: 12px 0; }

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

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

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

.article-tags {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--c-border-light);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

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

.z8caa6meta-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.z8caa6tagitem a {
    display: inline-block;
    padding: 4px 12px;
    background: var(--c-bg);
    border-radius: 20px;
    font-size: 12px;
    color: var(--c-accent);
    transition: var(--transition);
}

.z8caa6tagitem a:hover { background: var(--c-accent); color: #fff; }

.article-nav-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--c-border-light);
}

.nav-prev, .nav-next {
    padding: 14px 16px;
    background: var(--c-bg);
    border: 1px solid var(--c-border-light);
    border-radius: var(--radius);
    font-size: 13px;
}

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

.nav-prev a, .nav-next a { color: var(--c-primary); transition: var(--transition); }

.nav-prev a:hover, .nav-next a:hover { color: var(--c-accent); }

/* 相关文章 */
.related-item { border-bottom: 1px solid var(--c-border-light); }

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

.related-link {
    display: flex;
    gap: 14px;
    padding: 14px 0;
    color: inherit;
}

.related-link:hover .related-title { color: var(--c-accent); }

.related-thumb {
    flex-shrink: 0;
    width: 90px;
    height: 64px;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--c-border-light);
    background: var(--c-bg);
}

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

.related-title {
    display: block;
    font-size: 14px;
    color: var(--c-primary);
    margin-bottom: 4px;
    transition: var(--transition);
}

.related-desc { font-size: 12px; color: var(--c-muted); line-height: 1.55; }

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

.sidebar-block {
    background: var(--c-surface);
    border: 1px solid var(--c-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.sidebar-block-header {
    padding: 14px 18px;
    background: var(--c-primary);
    color: #fff;
}

.sidebar-block-header h3 { font-size: 14px; font-weight: 600; }

.sidebar-article-list { padding: 8px 14px; max-height: 520px; overflow-y: auto; }

.sidebar-article-list li { border-bottom: 1px solid var(--c-border-light); }

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

.sidebar-article-list a {
    display: flex;
    gap: 10px;
    padding: 10px 0;
    align-items: center;
}

.sidebar-article-list a:hover .sidebar-title { color: var(--c-accent); }

.sidebar-thumb {
    flex-shrink: 0;
    width: 56px;
    height: 42px;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--c-border-light);
    background: var(--c-bg);
}

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

.sidebar-title {
    display: block;
    font-size: 13px;
    color: var(--c-text);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: var(--transition);
}

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; gap: 32px; }
    .hero-text h1 { font-size: 30px; }
    .service-cards { grid-template-columns: 1fr; }
    .flow-steps { grid-template-columns: repeat(2, 1fr); }
    .knowledge-layout { grid-template-columns: 1fr; }
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .home-articles-grid { grid-template-columns: repeat(3, 1fr); }
    .page-layout { grid-template-columns: 1fr 240px; gap: 20px; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-list > li > a { padding: 8px 10px; font-size: 13px; }
}

@media (max-width: 768px) {
    :root {
        --header-h: 52px;
        --topbar-h: 0px;
    }

    .top-bar { display: none; }

    body.page-home,
    body.page-list,
    body.page-article { padding-top: var(--header-h); }

    .site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; }

    .menu-toggle { display: flex; }

    .site-nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: min(320px, 85vw);
        height: 100vh;
        background: var(--c-primary);
        padding: 60px 20px 24px;
        transition: left .3s ease;
        z-index: 999;
        overflow-y: auto;
    }

    .site-nav.is-open { left: 0; }

    .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }

    .nav-list > li > a {
        color: rgba(255,255,255,.88);
        padding: 13px 16px;
        border-radius: var(--radius);
    }

    .nav-list > li > a:hover { background: rgba(255,255,255,.08); color: #fff; }

    .nav-list .z8caa6this > a,
    .nav-list li.z8caa6this > a { background: rgba(0,137,123,.3); color: #4db6ac; }

    .btn-cta { text-align: center; margin-top: 8px; }

    body.menu-open { overflow: hidden; }

    .section { padding: 48px 0; }
    .section-head h2 { font-size: 22px; }
    .hero { padding: 40px 0 48px; }
    .hero-text h1 { font-size: 24px; }
    .hero-panel { grid-template-columns: 1fr 1fr; gap: 12px; }
    .hero-stat { padding: 16px 12px; }
    .hero-stat strong { font-size: 24px; }
    .flow-steps { grid-template-columns: 1fr; }
    .adv-grid { grid-template-columns: 1fr; }
    .home-articles-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .page-layout { grid-template-columns: 1fr; }
    .page-sidebar { position: static; }
    .page-content { padding: 20px 16px; }
    .list-item-link { flex-direction: column; }
    .list-item-thumb { width: 100%; height: 160px; }
    .list-item-link:hover { margin: 0; padding-left: 0; padding-right: 0; }
    .article-title { font-size: 20px; }
    .article-nav-links { grid-template-columns: 1fr; }
    .nav-next { text-align: left; }
    .pagebar-inner { flex-wrap: wrap; justify-content: center; }
    .pagebar-center { width: 100%; order: -1; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .site-logo { max-width: calc(100vw - 80px); font-size: 16px; }
}

@media (max-width: 480px) {
    .hero-actions { flex-direction: column; }
    .hero-actions .btn-primary,
    .hero-actions .btn-outline { text-align: center; }
    .hero-panel { grid-template-columns: 1fr; }
    .home-articles-grid { grid-template-columns: 1fr; }
    .about-metrics { grid-template-columns: 1fr 1fr; }
    .contact-form-wrap { padding: 20px 16px; }
    .related-link { flex-direction: column; }
    .related-thumb { width: 100%; height: 140px; }
}

@media print {
    .site-nav, .menu-toggle, .contact-form, .top-bar { display: none !important; }
    .section { padding: 20px 0; }
}