/* ============ 基础 ============ */
:root {
  --navy: #0b2545;
  --navy-deep: #071a33;
  --blue: #14477e;
  --blue-soft: #eaf1f9;
  --gold: #c9a227;
  --gold-deep: #a8861c;
  --text: #22303f;
  --muted: #6b7a89;
  --bg: #f6f8fa;
  --line: #e4e9ef;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(11, 37, 69, 0.08);
  --shadow-lg: 0 14px 40px rgba(11, 37, 69, 0.16);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.en-only { letter-spacing: .02em; }

/* ============ 顶栏 ============ */
.topbar { background: var(--navy-deep); color: #cfe0f2; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; height: 36px; }
.topbar a { color: #fff; }
.topbar .tb-right { display: flex; align-items: center; gap: 16px; }
.lang-btn {
  cursor: pointer; border: 1px solid rgba(255,255,255,.35); background: transparent; color: #fff;
  border-radius: 999px; padding: 1px 12px; font-size: 12px; line-height: 20px; transition: .2s;
}
.lang-btn:hover { background: var(--gold); border-color: var(--gold); }

/* ============ 导航 ============ */
.site-header {
  position: sticky; top: 0; z-index: 100; background: #fff;
  box-shadow: 0 1px 0 var(--line);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 46px; height: 46px; border-radius: 10px; flex: none;
  background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 100%);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 15px; letter-spacing: .5px;
  box-shadow: inset 0 0 0 2px rgba(201,162,39,.7);
}
.logo-text .cn { font-size: 19px; font-weight: 700; color: var(--navy); line-height: 1.25; }
.logo-text .en { font-size: 11px; color: var(--muted); letter-spacing: .04em; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-item > a {
  display: block; padding: 28px 16px; font-size: 15.5px; font-weight: 500; color: var(--text);
  border-bottom: 3px solid transparent; transition: .2s; white-space: nowrap;
}
.nav-item > a:hover, .nav-item.active > a { color: var(--blue); border-bottom-color: var(--gold); }
.dropdown {
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(8px);
  background: #fff; border-radius: 10px; box-shadow: var(--shadow-lg);
  min-width: 168px; padding: 8px 0; opacity: 0; visibility: hidden; transition: .22s;
}
.nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown::before { content: ""; position: absolute; top: -6px; left: 50%; transform: translateX(-50%) rotate(45deg); width: 12px; height: 12px; background: #fff; }
.dropdown a { display: block; padding: 8px 20px; font-size: 14px; color: var(--text); white-space: nowrap; }
.dropdown a:hover { background: var(--blue-soft); color: var(--blue); }
.dropdown a.all-link { color: var(--gold-deep); font-weight: 600; border-bottom: 1px solid var(--line); margin-bottom: 4px; }
.nav-cta { margin-left: 12px; }

/* 汉堡按钮（移动端） */
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--navy); margin: 5px 0; transition: .3s; }
.mobile-nav { display: none; }

/* ============ 按钮 ============ */
.btn {
  display: inline-block; padding: 12px 30px; border-radius: 999px; font-size: 15px;
  font-weight: 600; cursor: pointer; transition: .25s; border: 2px solid transparent;
}
.btn-gold { background: var(--gold); color: #fff; box-shadow: 0 6px 18px rgba(201,162,39,.35); }
.btn-gold:hover { background: var(--gold-deep); transform: translateY(-2px); }
.btn-ghost { border-color: rgba(255,255,255,.7); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--blue); transform: translateY(-2px); }
.btn-sm { padding: 8px 20px; font-size: 13.5px; }

/* ============ Hero ============ */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background: linear-gradient(128deg, #071a33 0%, #0b2545 45%, #123a6b 100%);
  padding: 108px 0 128px;
}
.hero-deco { position: absolute; inset: 0; pointer-events: none; opacity: .5; }
.hero-inner { position: relative; text-align: center; }
.hero-kicker {
  display: inline-block; border: 1px solid rgba(201,162,39,.65); color: #e8c65a;
  border-radius: 999px; padding: 4px 18px; font-size: 13px; letter-spacing: .18em; margin-bottom: 26px;
}
.hero h1 { font-size: 44px; font-weight: 700; line-height: 1.3; letter-spacing: .04em; }
.hero h1 .en { display: block; font-size: 20px; font-weight: 400; color: #b9cbe2; margin-top: 12px; letter-spacing: .08em; }
.hero .slogan { margin: 26px auto 0; max-width: 680px; font-size: 17px; color: #d7e3f1; }
.hero .actions { margin-top: 40px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-gold-bar { width: 72px; height: 4px; background: var(--gold); border-radius: 2px; margin: 30px auto 0; }

/* ============ 区块通用 ============ */
.section { padding: 84px 0; }
.section.alt { background: #fff; }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head .kicker { color: var(--gold-deep); font-size: 13px; font-weight: 700; letter-spacing: .22em; text-transform: uppercase; }
.sec-head h2 { font-size: 32px; color: var(--navy); margin-top: 10px; }
.sec-head .sub { color: var(--muted); margin-top: 10px; font-size: 15px; }
.sec-head .bar { width: 48px; height: 3px; background: var(--gold); margin: 18px auto 0; border-radius: 2px; }

/* ============ 服务卡片 ============ */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.service-card {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 38px 30px 34px; position: relative; overflow: hidden; transition: .3s;
  border: 1px solid var(--line); display: flex; flex-direction: column;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(201,162,39,.5); }
.service-card .icon {
  width: 58px; height: 58px; border-radius: 14px; background: var(--blue-soft);
  display: flex; align-items: center; justify-content: center; margin-bottom: 22px;
}
.service-card .icon svg { width: 30px; height: 30px; stroke: var(--blue); }
.service-card h3 { font-size: 19px; color: var(--navy); }
.service-card .en-name { font-size: 12.5px; color: var(--gold-deep); margin: 4px 0 12px; letter-spacing: .03em; }
.service-card p { color: var(--muted); font-size: 14.5px; flex: 1; }
.service-card .subs { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.service-card .subs span { font-size: 12px; color: var(--blue); background: var(--blue-soft); border-radius: 999px; padding: 2px 10px; }
.service-card .more { margin-top: 18px; color: var(--gold-deep); font-weight: 600; font-size: 14px; }

/* ============ 展会卡片 ============ */
.shows-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.show-card {
  background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  border: 1px solid var(--line); transition: .3s; display: flex; flex-direction: column; cursor: pointer;
}
.show-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.show-thumb { height: 170px; position: relative; overflow: hidden; }
.show-thumb img { width: 100%; height: 100%; object-fit: cover; }
.show-thumb .ph {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.92); font-weight: 700; font-size: 26px; letter-spacing: .1em;
}
.show-tag {
  position: absolute; top: 12px; left: 12px; background: rgba(7,26,51,.78); color: #fff;
  font-size: 12px; padding: 3px 12px; border-radius: 999px; backdrop-filter: blur(2px);
}
.show-body { padding: 22px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.show-body h3 { font-size: 17px; color: var(--navy); line-height: 1.5; }
.show-meta { margin-top: 10px; display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.show-meta .m { display: flex; align-items: center; gap: 6px; }
.show-meta svg { width: 14px; height: 14px; stroke: var(--gold-deep); flex: none; }
.show-body .summary { margin-top: 12px; color: var(--muted); font-size: 13.5px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.show-body .detail-link { margin-top: auto; padding-top: 16px; color: var(--blue); font-weight: 600; font-size: 14px; }

/* ============ 分类页 ============ */
.page-banner {
  background: linear-gradient(120deg, var(--navy-deep) 0%, var(--blue) 100%);
  color: #fff; padding: 64px 0 58px; position: relative; overflow: hidden;
}
.page-banner h1 { font-size: 34px; }
.page-banner .en { color: #b9cbe2; font-size: 15px; margin-top: 8px; letter-spacing: .06em; }
.page-banner .bar { width: 56px; height: 4px; background: var(--gold); border-radius: 2px; margin-top: 18px; }
.sub-tabs { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 76px; z-index: 50; }
.sub-tabs .container { display: flex; gap: 6px; overflow-x: auto; padding-top: 4px; padding-bottom: 4px; }
.sub-tabs::-webkit-scrollbar { height: 0; }
.sub-tab {
  white-space: nowrap; padding: 13px 18px; font-size: 14.5px; color: var(--muted);
  border-bottom: 3px solid transparent; cursor: pointer; transition: .2s;
}
.sub-tab:hover { color: var(--blue); }
.sub-tab.active { color: var(--navy); font-weight: 700; border-bottom-color: var(--gold); }

/* ============ 详情页 ============ */
.detail-wrap { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 48px 52px; margin-top: -60px; position: relative; }
.detail-wrap h1 { font-size: 28px; color: var(--navy); line-height: 1.45; }
.detail-wrap .en-title { color: var(--muted); font-size: 15px; margin-top: 8px; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 22px; margin: 22px 0; padding: 16px 20px; background: var(--blue-soft); border-radius: 10px; font-size: 14px; color: var(--blue); }
.detail-meta span { display: flex; align-items: center; gap: 7px; }
.detail-meta svg { width: 15px; height: 15px; stroke: var(--gold-deep); }
.detail-content { color: var(--text); font-size: 15.5px; white-space: pre-line; }
.detail-img { margin: 26px 0; border-radius: 12px; overflow: hidden; }
.back-link { display: inline-flex; align-items: center; gap: 6px; color: var(--blue); font-weight: 600; margin-bottom: 22px; cursor: pointer; }
.back-link:hover { color: var(--gold-deep); }

/* ============ 优势 ============ */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.feature { text-align: center; padding: 34px 22px; background: #fff; border-radius: var(--radius); border: 1px solid var(--line); transition: .3s; }
.feature:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.feature .fi {
  width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 50%;
  background: linear-gradient(135deg, var(--navy), var(--blue));
  display: flex; align-items: center; justify-content: center;
}
.feature .fi svg { width: 30px; height: 30px; stroke: #e8c65a; }
.feature h3 { font-size: 17px; color: var(--navy); }
.feature p { font-size: 13.5px; color: var(--muted); margin-top: 8px; }

/* ============ CTA ============ */
.cta-band { background: linear-gradient(120deg, var(--navy-deep), var(--blue)); color: #fff; padding: 64px 0; }
.cta-band .container { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h2 { font-size: 26px; }
.cta-band p { color: #c4d4e6; margin-top: 8px; }
.cta-band .phone-big { font-size: 24px; font-weight: 700; color: #e8c65a; }

/* ============ 联系页 ============ */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.contact-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 40px 30px; text-align: center; box-shadow: var(--shadow); }
.contact-card .ci { width: 62px; height: 62px; margin: 0 auto 18px; border-radius: 50%; background: var(--blue-soft); display: flex; align-items: center; justify-content: center; }
.contact-card .ci svg { width: 28px; height: 28px; stroke: var(--blue); }
.contact-card h3 { color: var(--navy); font-size: 17px; }
.contact-card .en { color: var(--gold-deep); font-size: 12px; margin-bottom: 12px; }
.contact-card .val { font-size: 17px; font-weight: 600; color: var(--text); word-break: break-all; }
.contact-card .val a:hover { color: var(--blue); }
.contact-note { margin-top: 40px; background: #fff; border: 1px dashed var(--line); border-radius: var(--radius); padding: 34px 40px; text-align: center; color: var(--muted); }
.contact-note strong { color: var(--navy); }

/* ============ 页脚 ============ */
.site-footer { background: var(--navy-deep); color: #9fb3c8; padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.site-footer h4 { color: #fff; font-size: 15.5px; margin-bottom: 16px; }
.site-footer .f-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.site-footer .f-logo .logo-mark { width: 40px; height: 40px; font-size: 13px; }
.site-footer .f-logo .cn { color: #fff; font-weight: 700; font-size: 16px; }
.site-footer .f-logo .en { font-size: 10.5px; color: #9fb3c8; }
.site-footer p { font-size: 13.5px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 9px; font-size: 13.5px; }
.site-footer li a:hover { color: #e8c65a; }
.site-footer .fc { display: flex; gap: 8px; align-items: flex-start; margin-bottom: 10px; font-size: 13.5px; }
.site-footer .fc svg { width: 15px; height: 15px; stroke: var(--gold); flex: none; margin-top: 4px; }
.site-footer .fc a { color: #dbe6f1; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0; text-align: center; font-size: 12.5px; color: #7a8ea3; }
.footer-bottom .en-line { margin-top: 2px; }

/* ============ 空状态 / 加载 ============ */
.empty-tip { text-align: center; color: var(--muted); padding: 60px 0; grid-column: 1/-1; }
.empty-tip .big { font-size: 40px; margin-bottom: 10px; }
.loading-tip { text-align: center; color: var(--muted); padding: 60px 0; grid-column: 1/-1; }

/* ============ 动画 ============ */
.fade-in { animation: fadeIn .5s ease both; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .services-grid, .shows-grid, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .main-nav .nav-item > a { padding: 28px 10px; font-size: 14.5px; }
}
@media (max-width: 768px) {
  .topbar .tb-left { display: none; }
  .main-nav { display: none; }
  .hamburger { display: block; }
  .hero h1 { font-size: 30px; }
  .hero { padding: 70px 0 84px; }
  .hero h1 .en { font-size: 15px; }
  .section { padding: 60px 0; }
  .services-grid, .shows-grid, .contact-grid, .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .detail-wrap { padding: 30px 22px; }
  .sec-head h2 { font-size: 25px; }
  .sub-tabs { top: 66px; }
  .nav-wrap { height: 66px; }
  .logo-text .cn { font-size: 15px; }
  .logo-text .en { font-size: 9px; }
  .cta-band .container { justify-content: center; text-align: center; }

  .mobile-nav {
    display: block; position: fixed; top: 0; right: -300px; width: 300px; height: 100vh;
    background: #fff; z-index: 200; transition: right .3s; box-shadow: -10px 0 40px rgba(0,0,0,.15);
    overflow-y: auto; padding: 20px 0;
  }
  .mobile-nav.open { right: 0; }
  .mobile-nav .m-head { display: flex; justify-content: space-between; align-items: center; padding: 0 22px 16px; border-bottom: 1px solid var(--line); }
  .mobile-nav .m-close { background: none; border: none; font-size: 26px; color: var(--navy); cursor: pointer; line-height: 1; }
  .mobile-nav .m-item { border-bottom: 1px solid var(--line); }
  .mobile-nav .m-item > a, .mobile-nav .m-item > .m-label { display: block; padding: 14px 22px; font-weight: 600; color: var(--navy); cursor: pointer; }
  .mobile-nav .m-subs { display: none; padding: 0 22px 14px; }
  .mobile-nav .m-item.open .m-subs { display: block; }
  .mobile-nav .m-subs a { display: block; padding: 8px 0 8px 14px; color: var(--muted); font-size: 14px; border-left: 2px solid var(--line); }
  .mobile-nav .m-subs a:hover { color: var(--blue); border-left-color: var(--gold); }
  .mobile-mask { display: none; position: fixed; inset: 0; background: rgba(7,26,51,.5); z-index: 150; }
  .mobile-mask.show { display: block; }
}