/* ============================================================
   广州市恒合通汇贸易有限公司 - 企业官网样式
   风格：简约大气 / 主色：深蓝 + 白
   ============================================================ */

:root {
  --primary: #1a3c6e;
  --primary-light: #2d5aa0;
  --accent: #e8b73a;
  --text: #2c3e50;
  --text-light: #7f8c9b;
  --bg-light: #f7f9fc;
  --white: #ffffff;
  --border: #e5eaf1;
  --shadow: 0 6px 24px rgba(26, 60, 110, 0.08);
  --radius: 10px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--white);
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s;
}
.header.scrolled { box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}
.logo-mark {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  letter-spacing: 1px;
}
.logo-text { line-height: 1.3; }
.logo-text .cn { font-size: 17px; color: var(--primary); }
.logo-text .en { font-size: 10px; color: var(--text-light); letter-spacing: 0.5px; }

.nav-links {
  display: flex;
  gap: 36px;
}
.nav-links a {
  font-size: 15px;
  color: var(--text);
  padding: 6px 0;
  position: relative;
  transition: color 0.25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 26px;
  color: var(--primary);
  cursor: pointer;
}

/* ---------- 页面横幅 ---------- */
.page-banner {
  background: linear-gradient(120deg, var(--primary) 0%, #16406f 55%, #0f2c52 100%);
  color: #fff;
  padding: 84px 0 76px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::before,
.page-banner::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
}
.page-banner::before { width: 420px; height: 420px; top: -180px; right: -120px; }
.page-banner::after { width: 300px; height: 300px; bottom: -160px; left: -80px; }

.page-banner h1 { font-size: 38px; letter-spacing: 2px; margin-bottom: 12px; }
.page-banner p { color: rgba(255, 255, 255, 0.75); font-size: 16px; }
.page-banner .crumb { margin-top: 18px; font-size: 13px; color: rgba(255,255,255,0.55); }
.page-banner .crumb a:hover { color: var(--accent); }

/* ---------- Hero（首页） ---------- */
.hero {
  min-height: 620px;
  display: flex;
  align-items: center;
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(45, 90, 160, 0.55), transparent 60%),
    radial-gradient(800px 400px at -10% 110%, rgba(232, 183, 58, 0.15), transparent 55%),
    linear-gradient(120deg, #16345e 0%, #1a3c6e 60%, #142c4e 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 90px 0;
}
.hero-tag {
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 30px;
  padding: 6px 18px;
  font-size: 13px;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 22px;
}
.hero h1 {
  font-size: 46px;
  line-height: 1.3;
  letter-spacing: 2px;
  margin-bottom: 18px;
}
.hero h1 .highlight { color: var(--accent); }
.hero .sub {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.78);
  max-width: 520px;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 13px 34px;
  border-radius: 8px;
  font-size: 15px;
  letter-spacing: 1px;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
}
.btn-primary { background: var(--accent); color: #1a2b45; font-weight: 600; }
.btn-primary:hover { background: #f0c652; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(232, 183, 58, 0.35); }
.btn-outline { border: 1px solid rgba(255, 255, 255, 0.55); color: #fff; background: transparent; }
.btn-outline:hover { background: rgba(255, 255, 255, 0.12); transform: translateY(-2px); }
.btn-dark { background: var(--primary); color: #fff; }
.btn-dark:hover { background: var(--primary-light); transform: translateY(-2px); }

/* hero 右侧图形装饰 */
.hero-visual { position: relative; height: 360px; }
.hero-visual .ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
}
.hero-visual .r1 { width: 340px; height: 340px; top: 10px; right: 10px; animation: float 7s ease-in-out infinite; }
.hero-visual .r2 { width: 240px; height: 240px; top: 60px; right: 60px; border-color: rgba(232,183,58,0.35); animation: float 7s ease-in-out infinite reverse; }
.hero-visual .r3 { width: 140px; height: 140px; top: 110px; right: 110px; background: rgba(255,255,255,0.06); border: none; }
.hero-visual .chip {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(4px);
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 13px;
  letter-spacing: 1px;
  animation: float 6s ease-in-out infinite;
}
.hero-visual .c1 { top: 30px; left: 125px; }
.hero-visual .c2 { top: 150px; right: -6px; animation-delay: 1.2s; }
.hero-visual .c3 { bottom: 20px; left: 60px; animation-delay: 2.4s; }
.hero-visual .c4 { top: 155px;left: 86px; animation-delay: 3s; }
.hero-visual .c5 { right: -30px;top: 40px; animation-delay: 3.5s; }
.hero-visual .c6 { bottom: 30px;right: -20px; animation-delay: 4s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* ---------- 通用区块 ---------- */
.section { padding: 90px 0; }
.section.alt { background: var(--bg-light); }

.section-head { text-align: center; margin-bottom: 56px; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--primary-light);
  margin-bottom: 10px;
  font-weight: 600;
}
.section-head h2 {
  font-size: 32px;
  color: var(--text);
  letter-spacing: 2px;
  margin-bottom: 14px;
}
.section-head .line {
  width: 56px;
  height: 3px;
  background: var(--accent);
  margin: 0 auto 16px;
  border-radius: 2px;
}
.section-head p { color: var(--text-light); max-width: 640px; margin: 0 auto; }

/* ---------- 首页业务卡片 ---------- */
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; align-items: center; }

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  transition: all 0.35s;
}
.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow);
  border-color: transparent;
}
.card .icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 16px;
  background: linear-gradient(135deg, #eef3fb, #dfe9f7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}
.card h3 { font-size: 18px; margin-bottom: 10px; color: var(--primary); }
.card p { font-size: 14px; color: var(--text-light); }
.card .more {
  display: inline-block;
  margin-top: 16px;
  font-size: 13px;
  color: var(--primary-light);
  font-weight: 600;
}
.card .more:hover { color: var(--accent); }

/* ---------- 数据统计 ---------- */
.stats { background: var(--primary); color: #fff; padding: 60px 0; }
.stats .grid-4 { gap: 16px; }
.stat { text-align: center; }
.stat .num { font-size: 42px; font-weight: 700; color: var(--accent); }
.stat .num span { font-size: 20px; }
.stat .label { font-size: 14px; color: rgba(255, 255, 255, 0.75); margin-top: 6px; letter-spacing: 1px; }

/* ---------- 关于预览（首页） ---------- */
.about-preview .text h2 { font-size: 30px; color: var(--primary); margin-bottom: 8px; }
.about-preview .text .en { font-size: 13px; letter-spacing: 2px; color: var(--text-light); text-transform: uppercase; }
.about-preview .text p { margin: 18px 0; color: var(--text-light); }
.about-points { margin: 20px 0 30px; }
.about-points li {
  padding-left: 30px;
  position: relative;
  margin-bottom: 12px;
  color: var(--text);
}
.about-points li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  background: var(--accent);
  color: #1a2b45;
  border-radius: 50%;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.about-visual {
  position: relative;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #eef3fb 0%, #dce7f5 100%);
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.about-visual .big-icon { font-size: 130px; opacity: 0.9; }
.about-visual .badge {
  position: absolute;
  bottom: 28px;
  left: 28px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 22px;
  font-size: 13px;
  color: var(--text-light);
}
.about-visual .badge b { display: block; font-size: 22px; color: var(--primary); }

/* ---------- 服务详情页 ---------- */
.service-block {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 28px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  margin-bottom: 28px;
  transition: box-shadow 0.3s;
}
.service-block:hover { box-shadow: var(--shadow); }
.service-block .s-icon {
  width: 90px;
  height: 90px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
}
.service-block h3 { font-size: 22px; color: var(--primary); margin-bottom: 6px; }
.service-block .s-en { font-size: 12px; color: var(--text-light); letter-spacing: 1px; margin-bottom: 14px; }
.service-block p { color: var(--text-light); font-size: 15px; margin-bottom: 14px; }
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tags span {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 12px;
  color: var(--primary-light);
}

/* ---------- 开发流程 ---------- */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: step; }
.flow-step {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 20px;
  text-align: center;
  position: relative;
  transition: all 0.3s;
}
.flow-step:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.flow-step .num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.flow-step h4 { font-size: 16px; color: var(--primary); margin-bottom: 8px; }
.flow-step p { font-size: 13px; color: var(--text-light); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; }
.contact-info .info-item {
  display: flex;
  gap: 18px;
  padding: 22px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 18px;
}
.contact-info .info-icon {
  width: 50px;
  height: 50px;
  flex-shrink: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, #eef3fb, #dfe9f7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}
.contact-info h4 { font-size: 16px; color: var(--primary); margin-bottom: 4px; }
.contact-info p { font-size: 14px; color: var(--text-light); }

.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}
.contact-form h3 { font-size: 20px; color: var(--primary); margin-bottom: 22px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text);
  margin-bottom: 6px;
  font-weight: 600;
}
.form-group label .req { color: #d64545; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-light);
  transition: border-color 0.25s, background 0.25s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary-light);
  background: var(--white);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-msg {
  display: none;
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
}
.form-msg.success { display: block; background: #eaf7ef; color: #1d7a43; border: 1px solid #bfe5cd; }

/* ---------- 页脚 ---------- */
.footer { background: #12233f; color: rgba(255, 255, 255, 0.7); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; padding-bottom: 48px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; letter-spacing: 1px; }
.footer .logo-text .cn { color: #fff; }
.footer p { font-size: 13px; line-height: 1.9; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 13px; transition: color 0.25s; }
.footer-links a:hover { color: var(--accent); }
.footer-contact li { font-size: 13px; margin-bottom: 10px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- CTA 条 ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--primary), #29528f);
  color: #fff;
  padding: 56px 0;
  text-align: center;
}
.cta-band h2 { font-size: 28px; margin-bottom: 10px; letter-spacing: 2px; }
.cta-band p { color: rgba(255, 255, 255, 0.75); margin-bottom: 26px; }

/* ---------- 动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .hero-inner { grid-template-columns: 1fr; padding: 64px 0; }
  .hero-visual { display: none; }
  .hero h1 { font-size: 36px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 6%; border-bottom: 1px solid var(--border); }
  .grid-4, .grid-3, .flow { grid-template-columns: 1fr 1fr; }
  .service-block { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .hero h1 { font-size: 30px; }
  .page-banner h1 { font-size: 28px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}