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

:root {
  --blue: #1f87e8;
  --gold: #fed835;
  --purple: #695df7;
  --dark: #444;
  --gray: #777;
  --light-gray: #e6e6e6;
  --bg-gray: #f8f8f8;
  --white: #fff;
  --nav-height: 92px;
  --max-w: 1340px;
}

html { scroll-behavior: smooth; }

body {
  font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--blue); text-decoration: none; transition: color .2s; }
a:hover { color: #4da6f0; }
img { max-width: 100%; height: auto; display: block; }

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

/* ========== Header ========== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px; height: var(--nav-height);
}

.logo-area { display: flex; align-items: center; gap: 16px; }
.logo-area img { width: 56px; height: 56px; border-radius: 6px; }
.logo-text { display: flex; flex-direction: column; }
.logo-text .cn { font-size: 20px; font-weight: bold; color: var(--blue); font-family: "Arial Black", "Microsoft YaHei", sans-serif; }
.logo-text .en { font-size: 22px; font-weight: bold; color: var(--blue); font-family: "Arial Black", "Microsoft YaHei", sans-serif; letter-spacing: 2px; }

.nav { display: flex; align-items: center; gap: 4px; height: 100%; }
.nav a {
  display: flex; align-items: center; padding: 0 20px; height: 100%;
  font-size: 16px; color: #353535; font-weight: 500;
  border-bottom: 3px solid transparent; transition: all .2s; white-space: nowrap;
}
.nav a:hover, .nav a.active { color: var(--blue); border-bottom-color: var(--blue); }

/* Hamburger */
.menu-btn {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px; z-index: 1001;
}
.menu-btn span { display: block; width: 26px; height: 3px; background: var(--blue); border-radius: 2px; transition: all .3s; }
.menu-btn.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.menu-btn.open span:nth-child(2) { opacity: 0; }
.menu-btn.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

.nav-overlay {
  position: fixed; inset: 0; z-index: 999; background: rgba(0,0,0,0.5);
  opacity: 0; pointer-events: none; transition: opacity .3s;
}
.nav-overlay.open { opacity: 1; pointer-events: auto; }

.nav-panel {
  position: fixed; top: 0; right: -300px; bottom: 0; width: 280px; z-index: 1000;
  background: #fff; padding: 90px 24px 40px; transition: right .3s;
  display: flex; flex-direction: column; gap: 4px;
  box-shadow: -4px 0 20px rgba(0,0,0,0.1); overflow-y: auto;
}
.nav-panel.open { right: 0; }
.nav-panel a {
  display: block; padding: 14px 20px; font-size: 16px; color: #353535;
  border-radius: 6px; border-left: 3px solid transparent; transition: all .2s;
}
.nav-panel a:hover, .nav-panel a.active { color: var(--blue); border-left-color: var(--blue); background: #f5faff; }

/* ========== Banner ========== */
.banner {
  margin-top: var(--nav-height);
  background: #1a6ec7 url('/images/banner.png') center/cover no-repeat;
  position: relative; display: flex; align-items: center; justify-content: center;
}
.banner::after { content: ''; position: absolute; inset: 0; background: rgba(0,0,0,0.35); }
.banner-home { height: 500px; }
.banner-page { height: 220px; }
.banner-inner { position: relative; z-index: 1; text-align: center; color: #fff; padding: 0 20px; max-width: 100%; }
.banner-inner h1 { font-size: 42px; color: var(--gold); margin-bottom: 8px; text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.banner-inner .sub { font-size: 22px; font-family: "Impact", "Microsoft YaHei", sans-serif; letter-spacing: 3px; text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.banner-page .banner-inner h1 { font-size: 30px; color: #fff; margin-bottom: 4px; }
.banner-page .banner-inner .sub { font-size: 14px; letter-spacing: 1px; }

/* ========== Sections ========== */
.section { padding: 80px 0; }
.section-gray { background: var(--bg-gray); }
.section-title { font-size: 28px; font-weight: bold; color: var(--dark); margin-bottom: 10px; text-align: center; }
.section-sub { font-size: 18px; font-weight: bold; color: var(--purple); text-align: center; margin-bottom: 50px; font-family: "Impact", "Microsoft YaHei", sans-serif; letter-spacing: 2px; }

/* ========== Hero Split ========== */
.hero-split { display: flex; align-items: flex-start; gap: 60px; padding: 60px 0; }
.hero-left { flex: 1; padding-top: 10px; }
.hero-left h2 { font-size: 30px; color: var(--dark); margin-bottom: 8px; }
.hero-left .en { font-size: 20px; font-weight: bold; color: var(--purple); margin-bottom: 24px; letter-spacing: 2px; }
.hero-left .desc { font-size: 16px; color: var(--gray); line-height: 2; margin-bottom: 30px; }
.hero-left .btn {
  display: inline-block; background: var(--purple); color: #fff;
  padding: 14px 40px; border-radius: 26px; font-size: 16px; font-weight: 500;
  transition: all .3s; border: none; cursor: pointer;
}
.hero-left .btn:hover { opacity: 0.9; transform: translateY(-2px); box-shadow: 0 4px 16px rgba(105,93,247,0.4); }

.hero-right { flex: 1; }
.hero-right h2 { font-size: 28px; color: var(--dark); margin-bottom: 20px; }
.hero-right ol { list-style: none; counter-reset: item; display: flex; flex-direction: column; gap: 6px; }
.hero-right ol li {
  counter-increment: item; font-size: 14px; color: var(--gray);
  position: relative; padding-left: 32px; line-height: 1.9;
}
.hero-right ol li::before {
  content: counter(item); position: absolute; left: 0; top: 2px;
  width: 22px; height: 22px; border-radius: 50%; background: var(--blue);
  color: #fff; font-size: 12px; font-weight: bold;
  display: flex; align-items: center; justify-content: center;
}

/* ========== Cards ========== */
.cards { display: flex; gap: 30px; }
.card {
  flex: 1; background: #fff; border-radius: 12px; overflow: hidden;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
  transition: transform .3s, box-shadow .3s; text-align: center;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 8px 36px rgba(0,0,0,0.10); }
.card-body { padding: 36px 28px 40px; }
.card-body h3 { font-size: 20px; color: var(--dark); margin-bottom: 6px; }
.card-body .divider { width: 40px; height: 2px; background: var(--light-gray); margin: 12px auto 20px; }
.card-body p { font-size: 14px; color: var(--gray); line-height: 2; text-align: left; }
.card-body ul { list-style: none; text-align: left; margin-top: 10px; }
.card-body ul li { font-size: 13px; color: var(--gray); line-height: 1.9; padding-left: 16px; position: relative; }
.card-body ul li::before { content: '•'; position: absolute; left: 0; color: var(--blue); }

/* ========== News ========== */
.news-list { display: flex; flex-direction: column; gap: 0; max-width: 900px; margin: 0 auto; }
.news-item { display: block; padding: 24px 0; border-bottom: 1px solid #f0f0f0; }
.news-item:last-child { border-bottom: none; }
.news-info { min-width: 0; }
.news-info h4 { font-size: 18px; color: var(--dark); line-height: 1.5; margin-bottom: 8px; font-weight: 500; }
.news-info p { font-size: 14px; color: var(--gray); line-height: 1.8; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.news-more { text-align: center; padding: 24px 0; }
.news-more a { font-size: 15px; color: var(--blue); }

/* ========== Gallery ========== */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; }
.gallery img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 0; }

/* ========== Bidding ========== */
.bidding-content { display: flex; align-items: flex-start; gap: 50px; padding: 40px 0; }
.bidding-left img { width: 160px; }
.bidding-right { flex: 1; }
.bidding-right h3 { font-size: 24px; color: var(--blue); margin-bottom: 10px; font-family: "Arial Black", "Microsoft YaHei", sans-serif; }
.bidding-right h4 { font-size: 18px; color: #666; margin-bottom: 30px; font-weight: normal; }
.bidding-right p { font-size: 16px; color: var(--gray); line-height: 2; letter-spacing: .5px; }
.bidding-right .en { font-size: 15px; color: #999; line-height: 2; margin-top: 20px; }

/* ========== CSO ========== */
.cso-content { text-align: center; padding: 40px 0; }
.cso-content h3 { font-size: 22px; color: var(--blue); margin-bottom: 40px; font-weight: normal; }
.cso-images { display: flex; justify-content: center; gap: 40px; margin-bottom: 40px; flex-wrap: wrap; }
.cso-images img { max-width: 480px; min-width: 320px; flex: 1 1 320px; border-radius: 8px; box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
.cso-text { font-size: 18px; color: var(--dark); line-height: 2; max-width: 860px; margin: 40px auto 0; text-align: center; }

/* ========== Partners ========== */
.partners-list { text-align: center; padding: 40px 0; }
.partners-list h2 { font-size: 24px; color: var(--dark); margin-bottom: 30px; }
.partners-list .partners-images { display: flex; flex-direction: column; gap: 20px; align-items: center; }
.partners-list .partners-images img { max-width: 600px; width: 100%; }

/* ========== Contact ========== */
.contact-section { display: flex; gap: 50px; padding: 40px 0; }
.contact-left { flex: 0 0 420px; overflow: hidden; border-radius: 8px; }
.contact-left img { width: 100%; height: 100%; object-fit: cover; }
.contact-right { flex: 1; }
.contact-right h2 { font-size: 24px; color: var(--dark); margin-bottom: 6px; }
.contact-right .thanks { font-size: 24px; color: #fcb82e; font-family: "Impact", "Microsoft YaHei", sans-serif; margin-bottom: 30px; line-height: 1.5; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; color: #555; margin-bottom: 6px; }
.form-group input, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1px solid #ddd;
  border-radius: 6px; font-size: 15px; font-family: inherit;
  transition: border-color .2s; outline: none; background: var(--white);
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(31,135,232,0.1); }
.form-group textarea { resize: vertical; min-height: 160px; }
.form-submit { background: var(--blue); color: #fff; border: none; padding: 12px 40px; border-radius: 6px; font-size: 16px; cursor: pointer; transition: all .2s; }
.form-submit:hover { opacity: 0.9; }

.contact-info { margin-top: 30px; padding-top: 24px; border-top: 1px solid #eee; display: flex; flex-direction: column; gap: 14px; }
.contact-info .info-item { display: flex; align-items: baseline; gap: 10px; font-size: 15px; color: #555; }
.contact-info .info-item .label { font-size: 13px; color: #999; min-width: 42px; flex-shrink: 0; }
.contact-info .info-item .value { color: #444; }

/* ========== Footer ========== */
.footer { border-top: 1px solid #eee; padding: 24px 0 20px; }
.footer-main {
  display: flex; align-items: center; justify-content: space-between;
  gap: 30px; padding-bottom: 18px; margin-bottom: 14px;
  border-bottom: 1px solid #f0f0f0; flex-wrap: wrap;
}
.footer-brand { flex-shrink: 0; }
.footer-brand .cn {
  font-size: 16px; font-weight: bold; color: var(--blue);
  font-family: "Arial Black", "Microsoft YaHei", sans-serif; margin-bottom: 2px;
}
.footer-brand .en {
  font-size: 18px; font-weight: bold; color: var(--blue); letter-spacing: 2px;
}
.footer-right { display: flex; flex-direction: column; align-items: flex-end; gap: 12px; }
.footer-nav { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.footer-nav a { font-size: 14px; color: var(--blue); white-space: nowrap; }
.footer-nav a:hover { color: #4da6f0; }
.footer-contact {
  display: flex; align-items: center; justify-content: flex-end;
  gap: 24px; font-size: 13px; color: var(--blue); flex-wrap: wrap;
}
.footer-contact a { color: var(--blue); }
.footer-copy { font-size: 12px; color: #aaa; margin-top: 10px; }

/* ========== Quick Contact Bar (mobile) ========== */
.quick-bar { display: none; }
.footer-extra { display: none; }

/* ========== Animations ========== */
.anim-hidden { opacity: 0; transform: translateY(30px); transition: opacity .6s ease-out, transform .6s ease-out; }
.anim-fade-left { opacity: 0; transform: translateX(-40px); transition: opacity .6s ease-out, transform .6s ease-out; }
.anim-fade-right { opacity: 0; transform: translateX(40px); transition: opacity .6s ease-out, transform .6s ease-out; }
.anim-zoom { opacity: 0; transform: scale(0.95); transition: opacity .6s ease-out, transform .6s ease-out; }
.anim-show { opacity: 1 !important; transform: translateY(0) translateX(0) scale(1) !important; }
.card:nth-child(2) { transition-delay: .15s; }
.card:nth-child(3) { transition-delay: .3s; }

/* ========== Responsive ========== */
@media (max-width: 900px) {
  :root { --nav-height: 68px; }
  .header-inner { padding: 0 16px; }
  .logo-area img { width: 42px; height: 42px; }
  .logo-text .cn { font-size: 16px; }
  .logo-text .en { font-size: 17px; }

  .nav { display: none; }
  .menu-btn { display: flex; }

  .banner-home { height: 320px; }
  .banner-page { height: 180px; }
  .banner-inner h1 { font-size: 28px; }
  .banner-inner .sub { font-size: 16px; }
  .banner-page .banner-inner h1 { font-size: 22px; }
  .banner-page .banner-inner .sub { font-size: 13px; }

  .section { padding: 40px 0; }
  .hero-split { flex-direction: column; gap: 30px; padding: 30px 0; }
  .cards { flex-direction: column; gap: 24px; }
  .card-body { padding: 24px 18px 30px; }

  .news-item { padding: 18px 0; }

  .news-info h4 { font-size: 15px; }
  .news-info p { -webkit-line-clamp: 2; }

  .gallery { grid-template-columns: repeat(2, 1fr); }

  .bidding-content { flex-direction: column; gap: 30px; }
  .bidding-left { text-align: center; }
  .bidding-left img { display: inline-block; }

  .cso-images { flex-direction: column; align-items: center; gap: 20px; }
  .cso-images img { max-width: 100%; min-width: 0; }

  .contact-section { flex-direction: column; gap: 30px; }
  .contact-left { flex: none; }

  .footer-main { flex-direction: column; align-items: flex-start; gap: 16px; }
  .footer-right { flex-direction: column; align-items: flex-start; gap: 14px; }
  .footer-nav { flex-direction: column; align-items: flex-start; gap: 10px; }
  .footer-contact { flex-direction: column; align-items: flex-start; gap: 8px; }

  /* 快捷联系栏 */
  .quick-bar {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 900;
    background: #fff; border-top: 1px solid #eee; box-shadow: 0 -2px 10px rgba(0,0,0,0.06);
  }
  .quick-bar a {
    flex: 1; text-align: center; padding: 10px 0; font-size: 12px; color: var(--dark);
    display: flex; flex-direction: column; align-items: center; gap: 3px;
    transition: background .2s;
  }
  .quick-bar a:active { background: #f5f5f5; }
  .quick-bar a .qicon { font-size: 20px; line-height: 1; }
  .footer { padding-bottom: 80px; }
}