/* ============================================================
   Wanzhi Industrial Theme - Main Stylesheet
   Mobile-first, CSS variables, no external dependencies
   ============================================================ */

:root {
  --c-primary: #0a3d62;
  --c-primary-dark: #082c47;
  --c-primary-light: #eaf1f7;
  --c-dark: #1a1a1a;
  --c-gray: #666666;
  --c-gray-light: #999999;
  --c-light: #fafafa;
  --c-border: #e0e0e0;
  --c-white: #ffffff;
  --c-text: #1a1a1a;
  --c-bg: #ffffff;
  --c-bg-alt: #fafafa;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --radius: 2px;
  --radius-lg: 2px;
  --transition: 0.25s ease;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --container: 1200px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font); font-size: 15px; line-height: 1.7;
  color: var(--c-text); background: var(--c-bg); overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--c-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-primary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
table { border-collapse: collapse; width: 100%; }
h1,h2,h3,h4,h5,h6 { line-height: 1.3; font-weight: 600; color: var(--c-dark); }
h1 { font-size: 1.75rem; } h2 { font-size: 1.5rem; } h3 { font-size: 1.2rem; }
p { margin-bottom: 0.8em; }
button,input,select,textarea { font-family: inherit; font-size: inherit; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 16px; }
.skip-link { position: absolute; top: -40px; left: 0; background: var(--c-primary); color: #fff; padding: 8px 16px; z-index: 10000; }
.skip-link:focus { top: 0; }
.screen-reader-text { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 24px; border-radius: var(--radius); font-size: 14px; font-weight: 500; border: 1px solid transparent; cursor: pointer; transition: all var(--transition); line-height: 1.4; white-space: nowrap; }
.btn-primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn-primary:hover { background: var(--c-primary-dark); border-color: var(--c-primary-dark); color: #fff; }
.btn-outline { background: transparent; color: var(--c-primary); border-color: var(--c-primary); }
.btn-outline:hover { background: var(--c-primary); color: #fff; }
.btn-outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.6); }
.btn-outline-light:hover { background: rgba(255,255,255,0.15); border-color: #fff; color: #fff; }
.btn-light { background: #fff; color: var(--c-primary); border-color: #fff; }
.btn-light:hover { background: var(--c-light); color: var(--c-primary-dark); }
.btn-lg { padding: 12px 32px; font-size: 16px; }
.btn-block { width: 100%; }

/* ============================================================
   Header
   ============================================================ */
.site-header { position: sticky; top: 0; z-index: 1000; background: #fff; border: 1px solid var(--c-border); }
.header-top { background: #fff; border-bottom: 1px solid var(--c-border); color: var(--c-gray); font-size: 13px; padding: 6px 0; }
.header-top-inner { display: flex; justify-content: space-between; align-items: center; }
.header-top-phone { display: inline-flex; align-items: center; gap: 6px; color: var(--c-primary); font-weight: 500; }
.header-main { background: #fff; }
.header-main-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.site-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.site-logo:hover { color: var(--c-dark); }
.logo-icon { height: 38px; width: auto; display: block; flex-shrink: 0; }
.logo-text-group { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text-cn { font-size: 18px; font-weight: 700; color: var(--c-dark); letter-spacing: 1px; }
.logo-text-en { font-size: 9px; color: var(--c-gray-light); letter-spacing: 2px; text-transform: uppercase; margin-top: 1px; }
@media (max-width: 768px) {
    .logo-icon { height: 32px; }
    .logo-text-cn { font-size: 16px; }
    .logo-text-en { font-size: 8px; }
}

/* Main Nav */
.main-nav { display: none; }
.main-nav.is-open { display: block; position: absolute; top: 100%; left: 0; right: 0; background: #fff; box-shadow: var(--shadow-md); border-top: 1px solid var(--c-border); }
.nav-menu { list-style: none; }
.nav-menu li { border-bottom: 1px solid var(--c-border); }
.nav-menu li a { display: block; padding: 14px 20px; font-size: 15px; font-weight: 500; color: var(--c-dark); transition: all var(--transition); }
.nav-menu li a:hover, .nav-menu li.current-menu-item > a { color: var(--c-primary); background: var(--c-primary-light); }

.menu-toggle { display: flex; flex-direction: column; gap: 5px; background: none; border: none; padding: 8px; cursor: pointer; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--c-dark); transition: all 0.3s; }
.menu-toggle.is-active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.is-active span:nth-child(2) { opacity: 0; }
.menu-toggle.is-active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.header-cta { display: none; }

@media (min-width: 1024px) {
  .menu-toggle { display: none; }
  .main-nav { display: block; }
  .main-nav.is-open { position: static; box-shadow: none; border: none; }
  .nav-menu { display: flex; gap: 4px; }
  .nav-menu li { border-bottom: none; position: relative; }
  .nav-menu li a { padding: 10px 16px; border-radius: var(--radius); font-size: 15px; }
  .nav-menu li a:hover, .nav-menu li.current-menu-item > a { background: transparent; color: var(--c-primary); }
  .nav-menu .sub-menu { position: absolute; top: 100%; left: 0; min-width: 180px; background: #fff; box-shadow: var(--shadow-md); border-radius: var(--radius); padding: 8px 0; opacity: 0; visibility: hidden; transform: translateY(10px); transition: all var(--transition); }
  .nav-menu li:hover > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav-menu .sub-menu li a { padding: 8px 16px; white-space: nowrap; }
  .header-cta { display: inline-flex; }
}

/* ============================================================
   Hero Slider
   ============================================================ */
.hero { position: relative; overflow: hidden; }
.hero-slider { position: relative; }
.hero-slides { display: flex; transition: transform 0.6s ease; }
.hero-slide { min-width: 100%; padding: 80px 0; display: flex; align-items: center; min-height: 420px; }
.hero-slide-inner { max-width: var(--container); margin: 0 auto; padding: 0 16px; color: var(--c-dark); }
.hero-title { font-size: 1.8rem; color: var(--c-dark); margin-bottom: 12px; font-weight: 700; }
.hero-subtitle { font-size: 1.1rem; color: var(--c-primary); margin-bottom: 12px; font-weight: 500; }
.hero-desc { font-size: 0.95rem; color: var(--c-gray); margin-bottom: 24px; max-width: 600px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-nav { position: absolute; top: 50%; transform: translateY(-50%); background: #fff; border: 1px solid var(--c-border); color: var(--c-dark); width: 44px; height: 44px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background var(--transition); z-index: 10; }
.hero-nav:hover { background: var(--c-primary); }
.hero-prev { left: 12px; }
.hero-next { right: 12px; }
.hero-dots { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; z-index: 10; }
.hero-dot { width: 10px; height: 10px; border-radius: 50%; border: none; background: var(--c-border); cursor: pointer; padding: 0; transition: all var(--transition); }
.hero-dot.is-active { background: var(--c-primary); width: 28px; border-radius: 5px; }

@media (min-width: 768px) {
  .hero-slide { min-height: 480px; padding: 80px 0; }
  .hero-title { font-size: 2.5rem; }
  .hero-subtitle { font-size: 1.3rem; }
  .hero-desc { font-size: 1.05rem; }
}
@media (min-width: 1024px) {
  .hero-slide { min-height: 560px; }
  .hero-title { font-size: 3rem; }
}

/* ============================================================
   Sections
   ============================================================ */
.section { padding: 80px 0; }
.section-gray { background: var(--c-bg-alt); }
.section-header { text-align: center; margin-bottom: 36px; }
.section-tag { display: inline-block; font-size: 13px; font-weight: 600; color: var(--c-primary); letter-spacing: 3px; margin-bottom: 8px; }
.section-title { font-size: 1.6rem; margin-bottom: 10px; position: relative; display: inline-block; }
.section-title::after { content: ''; position: absolute; bottom: -8px; left: 50%; transform: translateX(-50%); width: 40px; height: 3px; background: var(--c-primary); border-radius: 2px; }
.section-subtitle { color: var(--c-gray); font-size: 0.95rem; margin-top: 16px; }
.section-more { text-align: center; margin-top: 36px; }

@media (min-width: 768px) {
  .section { padding: 64px 0; }
  .section-title { font-size: 2rem; }
}

/* ============================================================
   Product Grid & Cards
   ============================================================ */
.product-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.product-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--c-border); transition: all var(--transition); }
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.product-card-link { display: block; color: inherit; }
.product-card-link:hover { color: inherit; }
.product-card-image { aspect-ratio: 3/2; overflow: hidden; background: var(--c-light); }
.product-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.product-card:hover .product-card-image img { transform: scale(1.05); }
.product-card-body { padding: 20px; }
.product-card-title { font-size: 1.15rem; margin-bottom: 6px; }
.product-card-model { font-size: 0.9rem; color: var(--c-gray); margin-bottom: 8px; }
.product-card-model strong { color: var(--c-primary); font-weight: 600; }
.product-card-desc { font-size: 0.9rem; color: var(--c-gray); margin-bottom: 12px; line-height: 1.6; }
.product-card-cta { display: inline-flex; align-items: center; gap: 4px; color: var(--c-primary); font-size: 0.9rem; font-weight: 500; transition: gap var(--transition); }
.product-card:hover .product-card-cta { gap: 8px; }

@media (min-width: 600px) { .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .product-grid { grid-template-columns: repeat(4, 1fr); gap: 28px; } }

/* ============================================================
   Application Grid
   ============================================================ */
.app-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.app-card { background: #fff; border-radius: var(--radius-lg); padding: 28px 16px; text-align: center; border: 1px solid var(--c-border); transition: all var(--transition); }
.app-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.app-card-icon { width: 64px; height: 64px; margin: 0 auto 14px; background: var(--c-primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: all var(--transition); }
.app-card:hover .app-card-icon { background: var(--c-primary); }
.app-card:hover .app-card-icon svg { stroke: #fff; }
.app-card h3 { font-size: 1rem; margin-bottom: 6px; }
.app-card p { font-size: 0.85rem; color: var(--c-gray); margin: 0; }

@media (min-width: 600px) { .app-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; } }
@media (min-width: 1024px) { .app-grid { grid-template-columns: repeat(6, 1fr); gap: 24px; } .app-card { padding: 32px 20px; } }

/* ============================================================
   Case Grid & Cards
   ============================================================ */
.case-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.case-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--c-border); transition: all var(--transition); }
.case-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.case-card-link { display: block; color: inherit; }
.case-card-link:hover { color: inherit; }
.case-card-image { aspect-ratio: 4/3; overflow: hidden; background: var(--c-light); }
.case-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.case-card:hover .case-card-image img { transform: scale(1.05); }
.case-card-body { padding: 18px; }
.case-card-body h3 { font-size: 1.05rem; margin-bottom: 6px; }
.case-card-body p { font-size: 0.9rem; color: var(--c-gray); margin-bottom: 10px; }
.case-card-cta { color: var(--c-primary); font-size: 0.88rem; font-weight: 500; }

.case-grid-3 .app-detail-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--c-border); transition: all var(--transition); }
.case-grid-3 .app-detail-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.app-detail-link { display: block; color: inherit; }
.app-detail-link:hover { color: inherit; }
.app-detail-image { aspect-ratio: 3/2; overflow: hidden; background: var(--c-light); }
.app-detail-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.app-detail-card:hover .app-detail-image img { transform: scale(1.05); }
.app-detail-body { padding: 18px; }
.app-detail-body h3 { font-size: 1.05rem; margin-bottom: 6px; }
.app-detail-body p { font-size: 0.9rem; color: var(--c-gray); margin-bottom: 10px; }
.app-detail-cta { color: var(--c-primary); font-size: 0.88rem; font-weight: 500; }

@media (min-width: 600px) { .case-grid, .case-grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .case-grid, .case-grid-3 { grid-template-columns: repeat(3, 1fr); gap: 28px; } }

/* ============================================================
   Stats
   ============================================================ */
.section-stats { background: var(--c-primary); padding: 40px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; text-align: center; }
.stat-item { color: #fff; }
.stat-number { display: block; font-size: 2rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
.stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.7); }

@media (min-width: 768px) { .stats-grid { grid-template-columns: repeat(4, 1fr); } .stat-number { font-size: 2.5rem; } }

/* ============================================================
   About + News
   ============================================================ */
.about-news-grid { display: grid; gap: 40px; }
.about-preview .section-title { display: block; }
.about-preview .section-title::after { left: 0; transform: none; }
.about-features { margin: 20px 0 24px; }
.about-features li { display: flex; align-items: center; gap: 10px; padding: 6px 0; font-size: 0.95rem; }
.news-preview-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.news-preview-header .section-title { margin: 0; font-size: 1.4rem; }
.news-preview-header .section-title::after { display: none; }
.news-more { color: var(--c-primary); font-size: 0.9rem; }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item { display: flex; gap: 14px; padding-bottom: 16px; border-bottom: 1px solid var(--c-border); }
.news-item:last-child { border-bottom: none; }
.news-date { flex-shrink: 0; text-align: center; min-width: 56px; }
.news-day { display: block; font-size: 1.4rem; font-weight: 700; color: var(--c-primary); line-height: 1; }
.news-month { display: block; font-size: 0.75rem; color: var(--c-gray-light); margin-top: 4px; }
.news-content h3 { font-size: 0.98rem; margin-bottom: 4px; line-height: 1.4; }
.news-content h3 a { color: var(--c-dark); }
.news-content h3 a:hover { color: var(--c-primary); }
.news-content p { font-size: 0.85rem; color: var(--c-gray); margin: 0; line-height: 1.5; }

@media (min-width: 1024px) {
  .about-news-grid { grid-template-columns: 1fr 1fr; gap: 60px; }
}

/* ============================================================
   Page Banner / Breadcrumb
   ============================================================ */
.page-banner { background: var(--c-primary); padding: 40px 0; color: #fff; }
.page-banner .page-title { color: #fff; font-size: 1.6rem; margin-top: 8px; }
.page-banner .page-subtitle { color: rgba(255,255,255,0.7); font-size: 0.95rem; margin-top: 8px; }
.breadcrumb { font-size: 0.85rem; }
.breadcrumb-list { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; color: rgba(255,255,255,0.6); }
.breadcrumb-list li:not(:last-child)::after { content: '/'; margin-left: 8px; color: rgba(255,255,255,0.3); }
.breadcrumb-list a { color: rgba(255,255,255,0.7); }
.breadcrumb-list a:hover { color: var(--c-primary); }
.breadcrumb-list li:last-child { color: var(--c-primary); }

@media (min-width: 768px) {
  .page-banner { padding: 56px 0; }
  .page-banner .page-title { font-size: 2rem; }
}

/* ============================================================
   Product Detail
   ============================================================ */
.product-detail { padding: 40px 0; }
.product-detail-grid { display: grid; gap: 32px; margin-bottom: 40px; }
.product-main-image { border-radius: var(--radius-lg); overflow: hidden; background: var(--c-light); }
.product-main-image img { width: 100%; }
.product-info-title { font-size: 1.5rem; margin-bottom: 8px; }
.product-info-model { font-size: 1rem; color: var(--c-gray); margin-bottom: 16px; }
.product-info-model strong { color: var(--c-primary); }
.product-excerpt { font-size: 1rem; color: var(--c-gray); margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--c-border); }
.spec-table { width: 100%; font-size: 0.9rem; }
.spec-table th, .spec-table td { padding: 10px 12px; border: 1px solid var(--c-border); text-align: left; }
.spec-table th { background: var(--c-light); font-weight: 500; width: 40%; color: var(--c-dark); }
.spec-table td { color: var(--c-gray); }
.product-contact-cta { display: flex; flex-direction: column; gap: 12px; margin-top: 24px; }

.product-detail-content h2 { font-size: 1.4rem; margin: 32px 0 16px; padding-bottom: 10px; border-bottom: 2px solid var(--c-primary); display: inline-block; }
.product-detail-content h3 { font-size: 1.15rem; margin: 24px 0 12px; color: var(--c-dark); }
.article-body { font-size: 0.95rem; line-height: 1.8; color: var(--c-gray); }
.article-body p { margin-bottom: 1em; }
.article-body img { border-radius: var(--radius); margin: 16px 0; }
.article-body h2, .article-body h3 { color: var(--c-dark); margin-top: 1.5em; }

.feature-list { display: grid; gap: 10px; }
.feature-list li { display: flex; align-items: flex-start; gap: 10px; font-size: 0.95rem; }
.feature-list li svg { flex-shrink: 0; margin-top: 2px; }

.table-wrapper { overflow-x: auto; margin: 16px 0; }
.spec-table-full th { background: var(--c-light); width: auto; }

.industry-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.industry-tag { display: inline-block; padding: 6px 16px; background: var(--c-primary-light); color: var(--c-primary); border-radius: 20px; font-size: 0.88rem; }

.product-faq { margin-top: 32px; }
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item { border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; }
.faq-item summary { padding: 14px 18px; font-weight: 500; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; background: var(--c-light); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 1.2rem; color: var(--c-primary); }
.faq-item[open] summary::after { content: '−'; }
.faq-answer { padding: 14px 18px; color: var(--c-gray); font-size: 0.93rem; line-height: 1.7; }

.related-products { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--c-border); }
.related-products .section-title { font-size: 1.3rem; display: block; margin-bottom: 24px; }
.related-products .section-title::after { display: none; }

@media (min-width: 768px) {
  .product-detail-grid { grid-template-columns: 1fr 1fr; }
  .product-contact-cta { flex-direction: row; }
}

/* ============================================================
   Single Content
   ============================================================ */
.single-content { padding: 40px 0; }
.content-with-sidebar { display: grid; gap: 32px; }
.article-detail { background: #fff; }
.article-featured-image { border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 24px; }
.article-featured-image img { width: 100%; }
.post-meta { display: flex; gap: 16px; font-size: 0.88rem; color: var(--c-gray-light); margin-top: 8px; }
.post-meta a { color: var(--c-gray-light); }
.post-cat { background: var(--c-primary-light); color: var(--c-primary); padding: 2px 10px; border-radius: 4px; font-size: 0.82rem; }
.post-tags { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--c-border); font-size: 0.9rem; }
.post-tags a { display: inline-block; padding: 3px 12px; background: var(--c-light); border-radius: 4px; margin: 2px; font-size: 0.85rem; color: var(--c-gray); }
.post-tags a:hover { background: var(--c-primary); color: #fff; }
.post-navigation { display: flex; justify-content: space-between; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--c-border); }
.post-navigation a { color: var(--c-gray); font-size: 0.9rem; }
.post-navigation a:hover { color: var(--c-primary); }
.related-section { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--c-border); }
.related-section .section-title { font-size: 1.3rem; margin-bottom: 24px; }

@media (min-width: 1024px) {
  .content-with-sidebar { grid-template-columns: 1fr 300px; }
}

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar { display: flex; flex-direction: column; gap: 24px; }
.widget { background: var(--c-light); border-radius: var(--radius-lg); padding: 24px; }
.widget-title { font-size: 1.05rem; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 2px solid var(--c-primary); display: inline-block; }
.widget-list li { padding: 8px 0; border-bottom: 1px solid var(--c-border); font-size: 0.9rem; }
.widget-list li:last-child { border-bottom: none; }
.widget-contact p { font-size: 0.9rem; margin-bottom: 10px; color: var(--c-gray); }
.widget-contact a { color: var(--c-primary); }
.widget-cta { background: var(--c-primary); color: #fff; text-align: center; }
.widget-cta .widget-title { color: #fff; border-color: var(--c-primary); }
.widget-cta p { color: rgba(255,255,255,0.8); font-size: 0.9rem; margin-bottom: 16px; }

/* ============================================================
   Archive / Post List
   ============================================================ */
.archive-page { padding: 40px 0; }
.archive-filters { margin-bottom: 32px; }
.filter-group { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.filter-label { font-weight: 500; color: var(--c-dark); margin-right: 4px; }
.filter-links { display: flex; flex-wrap: wrap; gap: 6px; }
.filter-links a { display: inline-block; padding: 5px 14px; border: 1px solid var(--c-border); border-radius: 20px; font-size: 0.88rem; color: var(--c-gray); transition: all var(--transition); }
.filter-links a:hover, .filter-links a.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

.post-list { display: flex; flex-direction: column; gap: 24px; }
.post-list-item { display: flex; gap: 16px; background: #fff; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--c-border); padding: 16px; transition: box-shadow var(--transition); }
.post-list-item:hover { box-shadow: var(--shadow-md); }
.post-list-thumb { flex-shrink: 0; width: 120px; height: 90px; border-radius: var(--radius); overflow: hidden; background: var(--c-light); }
.post-list-thumb img { width: 100%; height: 100%; object-fit: cover; }
.post-list-content { flex: 1; min-width: 0; }
.post-list-content h2 { font-size: 1.05rem; margin-bottom: 6px; }
.post-list-content h2 a { color: var(--c-dark); }
.post-list-content h2 a:hover { color: var(--c-primary); }
.post-list-content p { font-size: 0.88rem; color: var(--c-gray); margin: 6px 0; line-height: 1.5; }
.read-more { color: var(--c-primary); font-size: 0.85rem; font-weight: 500; }

@media (min-width: 768px) {
  .post-list-thumb { width: 200px; height: 140px; }
  .post-list-content h2 { font-size: 1.2rem; }
}

/* Pagination */
.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 40px; flex-wrap: wrap; }
.pagination .page-numbers { display: inline-flex; align-items: center; justify-content: center; min-width: 38px; height: 38px; padding: 0 12px; border: 1px solid var(--c-border); border-radius: var(--radius); color: var(--c-dark); font-size: 0.9rem; transition: all var(--transition); }
.pagination .page-numbers:hover, .pagination .page-numbers.current { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.pagination .page-numbers.dots { border: none; }

.empty-state { text-align: center; padding: 60px 20px; color: var(--c-gray); }

/* ============================================================
   About Page
   ============================================================ */
.about-page { padding: 40px 0; }
.about-hero { display: grid; gap: 32px; margin-bottom: 48px; }
.about-hero-text h2 { font-size: 1.5rem; margin-bottom: 16px; color: var(--c-dark); }
.about-hero-text p { color: var(--c-gray); margin-bottom: 12px; }
.about-hero-image { border-radius: var(--radius-lg); overflow: hidden; }
.about-section { margin-bottom: 48px; }
.advantages-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.advantage-card { text-align: center; padding: 28px 16px; border-radius: var(--radius-lg); background: var(--c-light); transition: all var(--transition); }
.advantage-card:hover { background: #fff; box-shadow: var(--shadow-md); transform: translateY(-3px); }
.advantage-icon { width: 64px; height: 64px; margin: 0 auto 14px; background: var(--c-primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.advantage-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.advantage-card p { font-size: 0.88rem; color: var(--c-gray); margin: 0; }
.about-stats-section { background: var(--c-primary); border-radius: var(--radius-lg); padding: 40px 20px; }

@media (min-width: 768px) {
  .about-hero { grid-template-columns: 1fr 1fr; align-items: center; }
  .advantages-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ============================================================
   Contact Page
   ============================================================ */
.contact-page { padding: 40px 0; }
.contact-grid { display: grid; gap: 32px; margin-bottom: 40px; }
.contact-info-card, .contact-form-card { background: #fff; border-radius: var(--radius-lg); padding: 28px; border: 1px solid var(--c-border); }
.contact-info-card h2, .contact-form-card h2 { font-size: 1.3rem; margin-bottom: 20px; }
.contact-info-list { display: flex; flex-direction: column; gap: 20px; }
.contact-info-item { display: flex; gap: 14px; }
.contact-info-icon { flex-shrink: 0; width: 48px; height: 48px; background: var(--c-primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.contact-info-item h3 { font-size: 1rem; margin-bottom: 4px; }
.contact-info-item p { font-size: 0.93rem; color: var(--c-gray); margin: 2px 0; }
.contact-info-item a { color: var(--c-primary); }

.contact-form .form-row { display: grid; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 500; margin-bottom: 6px; font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 10px 14px; border: 1px solid var(--c-border); border-radius: var(--radius); font-size: 0.93rem; transition: border-color var(--transition); background: #fff; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-primary-light); }
.form-note { font-size: 0.82rem; color: var(--c-gray-light); margin-top: 12px; }

.contact-map { margin-bottom: 40px; }
.map-placeholder { background: var(--c-light); border-radius: var(--radius-lg); padding: 60px 20px; text-align: center; color: var(--c-gray); }
.map-placeholder p { margin-top: 12px; }
.map-note { font-size: 0.85rem; color: var(--c-gray-light); }

@media (min-width: 768px) {
  .contact-grid { grid-template-columns: 1fr 1.2fr; }
  .contact-form .form-row { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   Footer
   ============================================================ */
.footer-cta { background: var(--c-primary); padding: 36px 0; }
.footer-cta-inner { display: flex; flex-direction: column; gap: 20px; align-items: center; text-align: center; }
.footer-cta-text h3 { color: #fff; font-size: 1.3rem; margin-bottom: 6px; }
.footer-cta-text p { color: rgba(255,255,255,0.9); margin: 0; font-size: 0.93rem; }
.footer-cta-actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

.footer-main { background: var(--c-primary); color: rgba(255,255,255,0.7); padding: 48px 0 0; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo-icon { height: 36px; width: auto; display: block; flex-shrink: 0; }
.footer-logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.footer-logo-cn { font-size: 16px; font-weight: 700; color: #fff; letter-spacing: 1px; }
.footer-logo-en { font-size: 8px; color: rgba(255,255,255,0.5); letter-spacing: 2px; text-transform: uppercase; margin-top: 1px; }
.footer-grid { display: grid; gap: 32px; grid-template-columns: 1fr; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo .logo-text strong { color: #fff; font-size: 18px; }
.footer-logo .logo-text small { color: rgba(255,255,255,0.5); }
.footer-desc { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.6); }
.footer-title { color: #fff; font-size: 1rem; margin-bottom: 16px; position: relative; padding-bottom: 10px; }
.footer-title::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 2px; background: var(--c-primary); }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
.footer-links a:hover { color: var(--c-primary); }
.footer-contact-list li { display: flex; gap: 10px; margin-bottom: 14px; font-size: 0.88rem; color: rgba(255,255,255,0.6); }
.footer-contact-list svg { flex-shrink: 0; margin-top: 3px; color: var(--c-primary); }
.footer-contact-list a { color: rgba(255,255,255,0.6); }
.footer-contact-list a:hover { color: var(--c-primary); }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; margin-top: 32px; }
.footer-bottom-inner { display: flex; flex-direction: column; gap: 8px; text-align: center; font-size: 0.82rem; color: rgba(255,255,255,0.5); }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--c-primary); }

@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; }
  .footer-bottom-inner { flex-direction: row; justify-content: space-between; text-align: left; }
}
@media (min-width: 1024px) {
  .footer-cta-inner { flex-direction: row; justify-content: space-between; text-align: left; }
}

/* ============================================================
   Back to Top
   ============================================================ */
.back-to-top { position: fixed; bottom: 24px; right: 24px; width: 44px; height: 44px; border-radius: 50%; background: var(--c-primary); color: #fff; border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(10px); transition: all var(--transition); z-index: 999; }
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--c-primary-dark); }

/* ============================================================
   404
   ============================================================ */
.error-404 { min-height: 60vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 60px 0; }
.error-404-code { font-size: 6rem; font-weight: 700; color: var(--c-primary); line-height: 1; }
.error-404-title { font-size: 1.5rem; margin-bottom: 12px; }
.error-404-desc { color: var(--c-gray); margin-bottom: 24px; }
.error-404-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 32px; }
.error-404-search { max-width: 400px; margin: 0 auto; }
.error-404-search input { width: 100%; padding: 10px 16px; border: 1px solid var(--c-border); border-radius: var(--radius); }

/* ============================================================
   Comments
   ============================================================ */
.comments-area { margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--c-border); }
.comments-title { font-size: 1.2rem; margin-bottom: 20px; }
.comment-list { margin-bottom: 32px; }
.comment-body { padding: 16px; border-bottom: 1px solid var(--c-border); }
.comment-meta { font-size: 0.85rem; color: var(--c-gray-light); margin-bottom: 8px; }
.comment-author { font-weight: 600; }
.reply { margin-top: 8px; }
.comment-form input, .comment-form textarea { width: 100%; padding: 10px 14px; border: 1px solid var(--c-border); border-radius: var(--radius); margin-bottom: 12px; }
.comment-form input:focus, .comment-form textarea:focus { outline: none; border-color: var(--c-primary); }
.comment-form label { display: block; font-weight: 500; margin-bottom: 4px; font-size: 0.9rem; }
.comment-form .form-submit { margin-top: 8px; }

/* ============================================================
   Search Form
   ============================================================ */
.search-form { display: flex; gap: 8px; }
.search-form input[type="search"] { flex: 1; padding: 10px 14px; border: 1px solid var(--c-border); border-radius: var(--radius); }
.search-form input[type="search"]:focus { outline: none; border-color: var(--c-primary); }
.search-form button { padding: 10px 20px; background: var(--c-primary); color: #fff; border: none; border-radius: var(--radius); cursor: pointer; }

/* ============================================================
   Page content
   ============================================================ */
.page-article { font-size: 0.95rem; line-height: 1.8; color: var(--c-gray); }
.page-article h2 { color: var(--c-dark); margin: 1.5em 0 0.5em; }
.page-article h3 { color: var(--c-dark); margin: 1.2em 0 0.4em; }
.page-article img { border-radius: var(--radius); margin: 16px 0; max-width: 100%; }
.page-article ul, .page-article ol { padding-left: 20px; margin-bottom: 1em; }
.page-article li { margin-bottom: 6px; }

/* Print */
@media print {
  .site-header, .site-footer, .back-to-top, .hero-nav, .hero-dots { display: none !important; }
}


/* ============================================================
   Knowledge Base / 技术智库 additions
   ============================================================ */
.news-cat {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--c-primary);
  background: var(--c-primary-light);
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 6px;
  font-weight: 500;
}
.post-cat-schema {
  background: #e8f5e9;
  color: #2e7d32;
}

/* HowTo steps */
.howto-steps {
  margin: 24px 0;
  padding: 24px;
  background: var(--c-light);
  border-radius: var(--radius-lg);
}
.howto-steps h2 {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: 1.2rem;
}
.howto-step-list {
  list-style: none;
  padding: 0;
  counter-reset: howto;
}
.howto-step {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-border);
}
.howto-step:last-child { border-bottom: none; }
.howto-step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--c-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}
.howto-step-content h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}
.howto-step-content p {
  font-size: 0.9rem;
  color: var(--c-gray);
  margin: 0;
}

/* Careers section in footer */
#careers {
  scroll-margin-top: 80px;
}