/* ============================================================
   首页全新样式 — 主色 #0056b3，自适应
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --blue:    #0056b3;
  --blue-d:  #004494;
  --blue-l:  #e8f1fc;
  --blue-ink:#003d80;
  --orange:  #FF6B00;
  --orange-d:#e55e00;
  --dark:    #0b2f5f;
  --text:    #2d2d2d;
  --muted:   #5a6b7d;
  --border:  #dde3ec;
  --bg:      #f5f8fd;
  --white:   #ffffff;
  --font:    'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  --radius:  6px;
  --shadow:  0 2px 12px rgba(0,86,179,.12);
  --shadow-l:0 1px 4px rgba(0,86,179,.08);
  --max:     1200px;
}
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: visible;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--blue-ink); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; color: var(--dark); }
h1 { font-size: clamp(1.8rem, 1.6vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); }
h3 { font-size: 1.15rem; }
p  { margin-bottom: 1.1rem; }
p:last-child { margin-bottom: 0; }
ul, ol { padding-left: 1.4rem; margin-bottom: 1rem; }
li { margin-bottom: .35rem; }
strong { font-weight: 600; }

.container { width: 80%; max-width: 1800px; margin: 0 auto; padding: 0 24px; }
.section { padding: 70px 0; scroll-margin-top: 84px; }
.section-sm { padding: 44px 0; }
.bg-blue { background: var(--blue); color: var(--white); }
.bg-blue h1,.bg-blue h2,.bg-blue h3,.bg-blue h4 { color: var(--white); }
.bg-light { background: var(--bg); }
.bg-dark { background: var(--dark); color: var(--white); }
.bg-dark h1,.bg-dark h2,.bg-dark h3,.bg-dark h4 { color: var(--white); }

.eyebrow {
  display: block;
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--blue-ink);
  margin-bottom: .75rem;
}
.eyebrow + h2 { margin-bottom: 1.4rem; }
.text-center { text-align: center; }
.text-muted { color: var(--muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 2rem; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .72rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: all .18s ease;
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary { background: var(--blue); color: var(--white); border-color: var(--blue); }
.btn-primary:hover { background: var(--blue-d); border-color: var(--blue-d); text-decoration: none; }
.btn-outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,.65); }
.btn-outline:hover { background: rgba(255,255,255,.12); border-color: var(--white); text-decoration: none; }
.btn-outline-blue { background: transparent; color: var(--blue-ink); border-color: var(--blue-ink); }
.btn-outline-blue:hover { background: var(--blue-l); text-decoration: none; }
.btn-lg { padding: .9rem 1.9rem; font-size: 1rem; }
.btn-group { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-l);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
  gap: 1.5rem;
  position: relative;
}
.nav-logo { display: inline-flex; align-items: center; text-decoration: none; flex-shrink: 0; line-height: 0; }
.nav-logo:hover { text-decoration: none; }
.nav-logo img { display: block; width: auto; height: 40px; }
.nav-main { display: flex; align-items: center; gap: .1rem; list-style: none; padding: 0; margin: 0 auto; flex: 1; justify-content: center; }
.nav-item { position: relative; }
.nav-link {
  display: flex; align-items: center; gap: .3rem;
  padding: .5rem .75rem;
  font-size: .92rem; font-weight: 500; color: var(--text);
  border-radius: var(--radius);
  transition: background .15s; cursor: pointer; white-space: nowrap;
}
.nav-link:hover { background: var(--bg); text-decoration: none; }
.nav-link.active { color: var(--blue-ink); }
.nav-chevron { width: 11px; height: 11px; transition: transform .2s; }
.nav-item:hover .nav-chevron { transform: rotate(180deg); }
.nav-dropdown {
  display: none;
  position: absolute; top: calc(100% + 2px); left: 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0,56,125,.14);
  min-width: 220px; padding: .5rem; z-index: 100;
}
.nav-item:hover .nav-dropdown { display: block; }
.nav-item:focus-within .nav-dropdown { display: block; }
.nav-dropdown a { display: block; padding: .55rem .9rem; font-size: .88rem; color: var(--text); border-radius: 4px; }
.nav-dropdown a:hover { background: var(--bg); color: var(--blue-ink); text-decoration: none; }
.nav-dropdown-all { margin-top: .35rem; border-top: 1px solid var(--border); padding-top: .55rem !important; color: var(--blue-ink) !important; font-weight: 600 !important; font-size: .82rem !important; }
.nav-dropdown-all:hover { background: var(--blue-l) !important; }
.nav-cta { margin-left: 1rem; }
.nav-item-cta-mobile { display: none; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: .5rem; flex-direction: column; gap: 5px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--dark); border-radius: 2px; transition: all .2s; }

/* ---------- HERO ---------- */
.hero {
  background: linear-gradient(135deg, #6da5ea 0%, #2f86e0 35%, #0a5ec2 70%, #0056b3 100%);
  color: var(--white);
  padding: 90px 0 72px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
  position: relative; z-index: 1;
}
.hero-eyebrow { color: #bcd9ff; font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .12em; margin-bottom: .9rem; display: block; }
.hero h1 { color: var(--white); margin-bottom: 1.1rem; }
.hero-lead { font-size: 1.05rem; color: rgba(255,255,255,.88); margin-bottom: 2rem; }
.hero-visual { border-radius: 12px; overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,.28); }
.media-frame { background: #dbe5f3; border-radius: var(--radius); overflow: hidden; position: relative; min-height: 220px; }
.media-frame-hero { min-height: 400px; }
.media-photo { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }

/* ---------- TRUST BAR ---------- */
.trust-bar { background: var(--blue-l); border-bottom: 1px solid var(--border); }
.trust-bar .container {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 1rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  text-align: center;
}
.trust-item .num { font-size: 2rem; font-weight: 800; color: var(--blue-ink); display: block; line-height: 1.1; }
.trust-item .num .unit { font-size: 1rem; font-weight: 600; margin-left: 2px; }
.trust-item .label { font-size: .8rem; color: var(--muted); display: block; margin-top: 2px; }

/* ---------- 卡片网格 ---------- */
.card-grid { display: grid; gap: 1.5rem; }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }
.split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: center; }
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.6rem;
  transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.card-icon {
  width: 46px; height: 46px;
  background: var(--blue-l);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
}
.card-icon svg { color: var(--blue-ink); }
.card h3 { margin-bottom: .5rem; }
.card p { font-size: .9rem; color: var(--muted); margin-bottom: 1rem; }
.card .card-link { font-size: .88rem; font-weight: 600; color: var(--blue-ink); display: inline-flex; align-items: center; gap: .35rem; }
.card .card-link:hover { text-decoration: underline; }
.card-service { border-top: 3px solid var(--orange); }
.card-service:hover { border-top-color: var(--blue-ink); }
.section-heading { margin-bottom: 2rem; }
.section-heading.center { text-align: center; }

/* ---------- 流程 ---------- */
.process-steps { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 1rem; position: relative; }
.process-step:not(:last-child)::after {
  content: '';
  position: absolute; top: 28px; left: 50%;
  width: calc(100% + 1rem); height: 2px;
  background: var(--border); z-index: 0;
}
.process-step { text-align: center; position: relative; z-index: 1; }
.step-num {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--blue); color: var(--white);
  font-weight: 800; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto .8rem; position: relative; z-index: 2;
}
.process-step h3 { font-size: .9rem; color: var(--dark); margin-bottom: .3rem; }
.process-step p { font-size: .78rem; color: var(--muted); }

/* ---------- CTA 带 ---------- */
.cta-band { background: var(--orange); padding: 60px 0; text-align: center; }
.cta-band h2 { color: var(--white); margin-bottom: .75rem; }
.cta-band p { color: rgba(255,255,255,.94); font-size: 1.02rem; max-width: 560px; margin: 0 auto 1.8rem; }
.cta-band .btn-outline { color: var(--white); border-color: rgba(255,255,255,.7); }
.cta-band .btn-outline:hover { background: rgba(255,255,255,.15); border-color: var(--white); }
.cta-band .btn-primary { background: var(--white); color: var(--orange); border-color: var(--white); }
.cta-band .btn-primary:hover { background: #fff7ef; }

/* ---------- 产品中心（品牌矩阵） ---------- */
.brand-products { background: var(--white); padding: 70px 0; }
.section_title { text-align: center; margin-bottom: 40px; }
.section_title h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); color: var(--dark); position: relative; padding-bottom: 14px; margin-bottom: 14px; }
.section_title h2::after { content: ''; width: 60px; height: 3px; background: var(--blue); position: absolute; left: 50%; bottom: 0; transform: translateX(-50%); }
.section_title p { font-size: 14px; color: var(--muted); max-width: 800px; margin: 0 auto; line-height: 1.7; }
.brand-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.brand-item { display: flex; border-radius: 12px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,.06); transition: box-shadow .3s; background: var(--white); }
.brand-item:hover { box-shadow: 0 8px 24px rgba(0,0,0,.12); }
.brand-left { width: 40%; min-height: 200px; background: #f0f4f9; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 20px; position: relative; transition: background .3s; }
.brand-left .logo-wrap { position: relative; width: 100%; height: 70px; display: flex; align-items: center; justify-content: center; }
.brand-left .logo-wrap img { max-width: 80%; max-height: 90px; position: absolute; transition: opacity .3s; }
.brand-left .logo-wrap .logo-hover { opacity: 0; }
.brand-item:hover .brand-left { background: var(--blue); }
.brand-item:hover .brand-left .logo-wrap .logo-default { opacity: 0; }
.brand-item:hover .brand-left .logo-wrap .logo-hover { opacity: 1; }
.brand-left .brand-link { margin-top: 18px; font-size: 14px; font-weight: 600; color: #4a5568; text-decoration: none; transition: color .3s; }
.brand-item:hover .brand-left .brand-link { color: var(--white); }
.brand-right { width: 60%; padding: 22px; display: flex; flex-direction: column; justify-content: center; gap: 6px; }
.brand-right a { color: #4a5568; text-decoration: none; font-size: 13px; line-height: 1.55; transition: color .2s; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.brand-right a:hover { color: var(--blue); }
.brand-right a::before { content: '>'; color: var(--orange); margin-right: 6px; font-weight: 700; }
.brand-item:hover .brand-right { background: #dbe8ff; border-left: 3px solid var(--blue); }

/* ---------- 新闻资讯与技术支持 ---------- */
.news-cases { background: var(--bg); padding: 70px 0; }
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.news-col h3 { font-size: 18px; color: var(--blue); font-weight: 700; margin-bottom: 15px; padding-bottom: 8px; border-bottom: 2px solid var(--border); position: relative; }
.news-col h3::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 40px; height: 2px; background: var(--orange); }
.news-col h3 a { color: inherit; text-decoration: none; }
.news-col h3 a:hover { text-decoration: none; color: var(--blue-d); }
.news-list { list-style: none; padding: 0; margin: 0; }
.news-list li { padding: 10px 0; border-bottom: 1px dashed #d5dde8; display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.news-list li a { color: #1a1a2e; text-decoration: none; font-size: 14px; transition: color .2s; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.news-list li a:hover { color: var(--blue); }
.news-list li::before { content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--orange); margin-right: 8px; flex-shrink: 0; }
.news-more { display: inline-block; margin-top: 12px; font-size: .85rem; color: var(--blue-ink); font-weight: 600; }
.news-more:hover { text-decoration: underline; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--blue); color: rgba(255,255,255,.85); font-size: 14px; }
.site-footer a { color: rgba(255,255,255,.85); text-decoration: none; transition: color .2s; }
.site-footer a:hover { color: var(--white); }
.site-footer .footer-top { padding: 44px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 3fr 1fr 1fr 1fr 1fr auto; gap: 16px; }
.footer-logo { display: inline-block; margin-bottom: .8rem; line-height: 0; }
.footer-logo img { height: 44px; width: auto; }
.footer-left p { margin-bottom: .5rem; font-size: 13px; line-height: 1.7; color: rgba(255,255,255,.82); }
.footer-left .fp { margin-bottom: .5rem; }
.footer-left .fla { display: inline-block; margin-top: .2rem; }
.footer-col h3 { color: var(--white); font-size: .95rem; margin-bottom: 12px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col ul li { margin-bottom: 6px; font-size: 13px; }
.footer-col ul li a::before { content: '\B7'; margin-right: 4px; color: var(--orange); }
.footer-col ul a { color: rgba(255,255,255,.8); }
.footer-qr { text-align: center; }
.footer-qr img { width: 94px; height: 94px; border-radius: 6px; border: 2px solid rgba(255,255,255,.35); display: inline-block; }
.footer-qr p { font-size: 12px; color: rgba(255,255,255,.75); margin-top: 6px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.2); padding: 18px 0 22px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 10px; justify-content: center; align-items: center; font-size: 12px; text-align: center; }
.footer-links .links-label { color: var(--white); font-weight: 600; margin-right: 4px; }
.footer-links a { color: rgba(255,255,255,.85); }
.footer-links a:hover { color: var(--white); }
.footer-links .sep { color: rgba(255,255,255,.45); }
.footer-copy { text-align: center; font-size: 12px; color: rgba(255,255,255,.7); margin-top: 14px; }
.footer-copy a { color: var(--white); text-decoration: underline; }

/* ---------- 返回顶部 ---------- */
#backToTop {
  position: fixed; right: 2rem; bottom: 2rem; z-index: 999;
  width: 44px; height: 52px; cursor: pointer; border: none; background: transparent; padding: 0;
  opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s;
}
#backToTop.show { opacity: 1; visibility: visible; }
#backToTop img { width: 44px; height: 52px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
  .footer-qr { grid-column: 1 / -1; }
  .process-steps { grid-auto-flow: row; grid-template-columns: repeat(4, 1fr); }
  .process-step:not(:last-child)::after { display: none; }
}
@media (max-width: 768px) {
  .container { width: 100%; padding: 0 18px; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero { padding: 56px 0 48px; }
  .trust-bar .container { grid-auto-flow: row; grid-template-columns: repeat(2, 1fr); }
  .split-grid { grid-template-columns: 1fr; gap: 2rem; }
  .card-grid-3, .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .card-grid-2 { grid-template-columns: 1fr; }
  .process-steps { grid-auto-flow: row; grid-template-columns: 1fr 1fr; }
  .brand-grid { grid-template-columns: 1fr; }
  .brand-left { min-height: 140px; }
  .news-grid { grid-template-columns: 1fr; gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-qr { grid-column: 1 / -1; }
  .btn { white-space: normal; }
  .btn-group { width: 100%; }
  .btn-group .btn { width: 100%; justify-content: center; }
  .hero .btn-group .btn, .cta-band .btn-group .btn { width: auto; }

  .nav-main, .nav-cta { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }
  .nav-main.open {
    display: flex;
    flex-direction: column;
    position: absolute; top: 66px; left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: .9rem 1rem 1rem;
    gap: .25rem;
    box-shadow: var(--shadow);
    max-height: calc(100vh - 66px);
    overflow-y: auto;
    margin: 0;
  }
  .nav-item { width: 100%; }
  .nav-item-cta-mobile { display: block; }
  .nav-link { width: 100%; justify-content: space-between; padding: .8rem .4rem; }
  .nav-dropdown { display: block; position: static; box-shadow: none; border: none; background: var(--bg); margin: .25rem 0 .5rem; min-width: 0; padding: .35rem; }
  .nav-dropdown a { padding: .7rem .8rem; }
}
@media (max-width: 480px) {
  h1 { font-size: 1.55rem; }
  h2 { font-size: 1.3rem; }
  .section { padding: 48px 0; }
  .section-sm { padding: 36px 0; }
  .container { width: 100%; padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .card-grid-3, .card-grid-4 { grid-template-columns: 1fr; }
  .trust-bar .container { grid-auto-flow: row; grid-template-columns: 1fr 1fr; }
  .trust-item .num { font-size: 1.5rem; }
  .btn-group { flex-direction: column; align-items: flex-start; }
  .footer-bottom { padding: 14px 0 18px; }
}

/* ============================================================
   全站公共头部（top.html）样式 — 主色 #0056b3
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --blue:    #0056b3;
  --blue-d:  #004494;
  --blue-l:  #e8f1fc;
  --blue-ink:#003d80;
  --orange:  #FF6B00;
  --orange-d:#e55e00;
  --dark:    #0b2f5f;
  --text:    #2d2d2d;
  --muted:   #5a6b7d;
  --border:  #0056b3;
  --bg:      #f5f8fd;
  --white:   #ffffff;
  --font:    'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  --radius:  6px;
  --shadow:  0 2px 12px rgba(0,86,179,.12);
  --shadow-l:0 1px 4px rgba(0,86,179,.08);
  --max:     1200px;
}
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: visible;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--blue-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: 80%; max-width: 1800px; margin: 0 auto; padding: 0 24px; }

/* ---------- 按钮（头部联系方式按钮） ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .72rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: all .18s ease;
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary { background: var(--blue); color: var(--white); border-color: var(--blue); }
.btn-primary:hover { background: var(--blue-d); border-color: var(--blue-d); text-decoration: none; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-l);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
  gap: 1.5rem;
  position: relative;
}
.nav-logo { display: inline-flex; align-items: center; text-decoration: none; flex-shrink: 0; line-height: 0; }
.nav-logo:hover { text-decoration: none; }
.nav-logo img { display: block; width: auto; height: 40px; }
.nav-main { display: flex; align-items: center; gap: .1rem; list-style: none; padding: 0; margin: 0 auto; flex: 1; justify-content: center; }
.nav-item { position: relative; }
.nav-link {
  display: flex; align-items: center; gap: .3rem;
  padding: .5rem .75rem;
  font-size: .92rem; font-weight: 500; color: var(--text);
  border-radius: var(--radius);
  transition: background .15s; cursor: pointer; white-space: nowrap;
}
.nav-link:hover { background: var(--bg); text-decoration: none; }
.nav-link.active { color: var(--blue-ink); }
.nav-chevron { width: 11px; height: 11px; transition: transform .2s; }
.nav-item:hover .nav-chevron { transform: rotate(180deg); }
.nav-dropdown {
  display: none;
  position: absolute; top: calc(100% + 2px); left: 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0,56,125,.14);
  min-width: 220px; padding: .5rem; z-index: 100;
}
.nav-item:hover .nav-dropdown { display: block; }
.nav-item:focus-within .nav-dropdown { display: block; }
.nav-dropdown a { display: block; padding: .55rem .9rem; font-size: .88rem; color: var(--text); border-radius: 4px; }
.nav-dropdown a:hover { background: var(--bg); color: var(--blue-ink); text-decoration: none; }
.nav-dropdown-all { margin-top: .35rem; border-top: 1px solid var(--border); padding-top: .55rem !important; color: var(--blue-ink) !important; font-weight: 600 !important; font-size: .82rem !important; }
.nav-dropdown-all:hover { background: var(--blue-l) !important; }
.nav-cta { margin-left: 1rem; }
.nav-item-cta-mobile { display: none; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: .5rem; flex-direction: column; gap: 5px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--dark); border-radius: 2px; transition: all .2s; }

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .container { width: 100%; padding: 0 18px; }
  .nav-main, .nav-cta { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }
  .nav-main.open {
    display: flex;
    flex-direction: column;
    position: absolute; top: 66px; left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: .9rem 1rem 1rem;
    gap: .25rem;
    box-shadow: var(--shadow);
    max-height: calc(100vh - 66px);
    overflow-y: auto;
    margin: 0;
  }
  .nav-item { width: 100%; }
  .nav-item-cta-mobile { display: block; }
  .nav-link { width: 100%; justify-content: space-between; padding: .8rem .4rem; }
  .nav-dropdown { display: block; position: static; box-shadow: none; border: none; background: var(--bg); margin: .25rem 0 .5rem; min-width: 0; padding: .35rem; }
  .nav-dropdown a { padding: .7rem .8rem; }
}


/* ============================================================
   侧边栏（left.html）样式 — 主色 #0056b3
   ============================================================ */
:root {
  --blue:    #0056b3;
  --blue-d:  #004494;
  --blue-l:  #e8f1fc;
  --blue-ink:#003d80;
  --orange:  #FF6B00;
  --dark:    #0b2f5f;
  --text:    #2d2d2d;
  --border:  #dde3ec;
  --bg:      #f5f8fd;
  --white:   #ffffff;
}
.sidebar {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.sidebar-block + .sidebar-block { border-top: 1px solid var(--border); }
.sidebar-title {
  margin: 0;
  padding: 7px 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--blue);
  border-bottom: 1px solid var(--blue-l);
}
.sidebar-title a { color: var(--blue); text-decoration: none; display: block; }
.sidebar-title a:hover { text-decoration: none; opacity: .8; }
.sidebar-list { list-style: none; padding: 0; margin: 0; }
.sidebar-list li { border-bottom: 1px solid #f3f6fa; }
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  padding: 5px 8px 5px 16px;
  font-size: 12px;
  color: var(--text);
  text-decoration: none;
  transition: color .15s, background .15s;
}
.sidebar-list a:hover { color: var(--blue); background: var(--blue-l); }
.sidebar-list .count { color: #999; font-size: 11px; flex-shrink: 0; }
.sidebar-list li.active a { color: var(--blue); font-weight: 700; background: #dbe8ff; border-left: 3px solid var(--blue); }


/* ============================================================
   全站公共页脚（foot.html）样式 — 主色 #0056b3
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --blue:    #0056b3;
  --blue-d:  #004494;
  --blue-l:  #e8f1fc;
  --blue-ink:#003d80;
  --orange:  #FF6B00;
  --orange-d:#e55e00;
  --dark:    #0b2f5f;
  --text:    #2d2d2d;
  --muted:   #5a6b7d;
  --border:  #dde3ec;
  --bg:      #f5f8fd;
  --white:   #ffffff;
  --font:    'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  --radius:  6px;
  --shadow:  0 2px 12px rgba(0,86,179,.12);
  --shadow-l:0 1px 4px rgba(0,86,179,.08);
  --max:     1200px;
}
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: visible;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--blue-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: 80%; max-width: 1800px; margin: 0 auto; padding: 0 24px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--blue); color: rgba(255,255,255,.85); font-size: 14px; }
.site-footer a { color: rgba(255,255,255,.85); text-decoration: none; transition: color .2s; }
.site-footer a:hover { color: var(--white); }
.site-footer .footer-top { padding: 44px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 3fr 1fr 1fr 1fr 1fr auto; gap: 16px; }
.footer-logo { display: inline-block; margin-bottom: .8rem; line-height: 0; }
.footer-logo img { height: 44px; width: auto; }
.footer-left p { margin-bottom: .5rem; font-size: 13px; line-height: 1.7; color: rgba(255,255,255,.82); }
.footer-left .fp { margin-bottom: .5rem; }
.footer-left .fla { display: inline-block; margin-top: .2rem; }
.footer-col h3 { color: var(--white); font-size: .95rem; margin-bottom: 12px; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col ul li { margin-bottom: 6px; font-size: 13px; }
.footer-col ul li a::before { content: '\B7'; margin-right: 4px; color: var(--orange); }
.footer-col ul a { color: rgba(255,255,255,.8); }
.footer-qr { text-align: center; }
.footer-qr img { width: 94px; height: 94px; border-radius: 6px; border: 2px solid rgba(255,255,255,.35); display: inline-block; }
.footer-qr p { font-size: 12px; color: rgba(255,255,255,.75); margin-top: 6px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.2); padding: 18px 0 22px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 10px; justify-content: center; align-items: center; font-size: 12px; text-align: center; }
.footer-links .links-label { color: var(--white); font-weight: 600; margin-right: 4px; }
.footer-links a { color: rgba(255,255,255,.85); }
.footer-links a:hover { color: var(--white); }
.footer-links .sep { color: rgba(255,255,255,.45); }
.footer-copy { text-align: center; font-size: 12px; color: rgba(255,255,255,.7); margin-top: 14px; }
.footer-copy a { color: var(--white); text-decoration: underline; }

/* ---------- 返回顶部 ---------- */
#backToTop {
  position: fixed; right: 2rem; bottom: 2rem; z-index: 999;
  width: 44px; height: 52px; cursor: pointer; border: none; background: transparent; padding: 0;
  opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s;
}
#backToTop.show { opacity: 1; visibility: visible; }
#backToTop img { width: 44px; height: 52px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
  .footer-qr { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  .container { width: 100%; padding: 0 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-qr { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
  .container { width: 100%; padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { padding: 14px 0 18px; }
}