/* ============ 河北稻禾 官方网站（简洁商务风·精良动效） ============ */
:root {
  --bg: #ffffff;
  --bg-soft: #f6f8f6;
  --surface: #ffffff;
  --border: #e7ebe8;
  --border-strong: #d3dad5;
  --primary: #1a6b47;
  --primary-dark: #125239;
  --primary-soft: #e8f2ec;
  --accent: #b8792e;
  --text: #2a342e;
  --muted: #5f6b64;
  --heading: #14201a;
  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1160px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { color: var(--heading); font-weight: 700; letter-spacing: 0; line-height: 1.3; }

/* ============ 滚动显现（克制的淡入上浮） ============ */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

/* ============ 顶部导航 ============ */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 700; color: var(--heading); letter-spacing: 1px; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--primary);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 16px;
}
.nav { display: flex; gap: 2px; }
.nav a {
  position: relative;
  padding: 8px 15px; border-radius: 8px;
  color: var(--muted); font-size: 15px; letter-spacing: 0.5px;
  transition: color .18s var(--ease), background-color .18s var(--ease);
}
.nav a::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 5px; height: 2px;
  background: var(--primary); border-radius: 2px;
  transform: scaleX(0); transform-origin: left; transition: transform .25s var(--ease);
}
.nav a:hover { color: var(--heading); }
.nav a:hover::after { transform: scaleX(1); }
.nav a.active { color: var(--primary); font-weight: 600; }
.nav a.active::after { transform: scaleX(1); }
.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 42px; height: 42px; flex-direction: column; align-items: center;
  justify-content: center; gap: 5px; border-radius: 9px;
  transition: background-color .18s var(--ease);
}
.nav-toggle:hover { background: var(--bg-soft); }
.nav-toggle span { display: block; width: 21px; height: 2px; background: var(--heading); border-radius: 2px; transition: all .25s var(--ease); }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero（简洁留白） ============ */
.hero {
  position: relative;
  background: linear-gradient(180deg, #fbfcfb 0%, #ffffff 100%);
  padding: 96px 0 84px;
  text-align: center;
}
.hero .container { position: relative; z-index: 1; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 14px; letter-spacing: 1px; color: var(--primary);
  font-weight: 600; margin-bottom: 24px;
}
.hero-eyebrow::before, .hero-eyebrow::after { content: ""; width: 26px; height: 1px; background: var(--primary); opacity: 0.5; }
.hero h1 {
  font-size: clamp(34px, 6vw, 56px);
  font-weight: 700; color: var(--heading); margin-bottom: 20px;
  letter-spacing: 0; line-height: 1.2;
}
.hero h1 .grad { color: var(--primary); }
.hero p {
  font-size: 18px; color: var(--muted); max-width: 600px;
  margin: 0 auto 40px; line-height: 1.8;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }

/* ============ 按钮（精良） ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 30px; border-radius: 10px; font-size: 15.5px;
  font-weight: 600; letter-spacing: 0.3px;
  cursor: pointer; border: 1px solid transparent; min-height: 50px;
  transition: transform .18s var(--ease), box-shadow .22s var(--ease), background-color .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 1px 2px rgba(18, 82, 57, 0.24);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 8px 22px rgba(18, 82, 57, 0.22); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 6px rgba(18, 82, 57, 0.22); }
.btn-ghost { background: #fff; color: var(--heading); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-1px); box-shadow: 0 6px 18px rgba(0, 0, 0, 0.05); }
.btn-ghost:active { transform: translateY(0); }

/* ============ 百度搜索栏 ============ */
.baidu-search {
  display: flex; align-items: center;
  max-width: 480px; margin: 40px auto 0;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: #fff;
  overflow: hidden;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.baidu-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(26, 107, 71, 0.1);
}
.baidu-search input {
  flex: 1; min-width: 0;
  padding: 13px 20px;
  background: transparent; border: none; outline: none;
  color: var(--text); font-size: 15px; font-family: inherit;
}
.baidu-search input::placeholder { color: #9aa5a0; }
.baidu-search button {
  flex-shrink: 0;
  margin: 6px; padding: 0 22px; height: 40px;
  border: none; border-radius: 8px;
  background: var(--primary);
  color: #fff; font-weight: 600; font-size: 14px;
  letter-spacing: 0.5px; cursor: pointer;
  transition: background-color .2s var(--ease);
}
.baidu-search button:hover { background: var(--primary-dark); }

/* ============ 区块 ============ */
.section { padding: 96px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 52px; }
.section-head h2 { font-size: clamp(26px, 4vw, 34px); margin: 10px 0 14px; letter-spacing: 0; }
.section-head p { color: var(--muted); font-size: 16px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--primary); font-size: 13px; font-weight: 600;
  letter-spacing: 1px;
}
.eyebrow::before, .eyebrow::after { content: ""; width: 20px; height: 1px; background: var(--primary); opacity: 0.5; }

/* ============ 卡片 ============ */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
  position: relative;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 18px 40px rgba(20, 32, 26, 0.08);
}
.card-icon {
  width: 52px; height: 52px; border-radius: 12px;
  background: var(--primary-soft); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.card-icon svg { width: 26px; height: 26px; }
.card h3 { font-size: 18px; margin-bottom: 9px; letter-spacing: 0; }
.card p { color: var(--muted); font-size: 15px; line-height: 1.7; }

/* ============ 数字统计 ============ */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  text-align: center; padding: 48px 32px;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius);
}
.stat .num { font-size: 44px; font-weight: 700; line-height: 1.15; color: var(--primary); }
.stat .label { color: var(--muted); font-size: 14px; margin-top: 6px; letter-spacing: 1px; }

/* ============ 时间线 ============ */
.timeline { max-width: 720px; margin: 0 auto; position: relative; padding-left: 32px; }
.timeline::before {
  content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px;
  width: 2px; background: var(--border-strong);
}
.timeline-item { position: relative; padding-bottom: 36px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ""; position: absolute; left: -30px; top: 6px;
  width: 13px; height: 13px; border-radius: 50%;
  background: #fff; border: 3px solid var(--primary);
}
.timeline-item .year { font-weight: 700; color: var(--primary); font-size: 16px; }
.timeline-item h4 { margin: 4px 0 6px; }
.timeline-item p { color: var(--muted); font-size: 15px; }

/* ============ 页面横幅 ============ */
.page-banner {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  padding: 64px 0;
  text-align: center;
}
.page-banner h1 { font-size: clamp(28px, 5vw, 40px); color: var(--heading); letter-spacing: 0; }
.page-banner p { color: var(--muted); margin-top: 8px; }

/* ============ 联系页 ============ */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.3fr; gap: 36px; align-items: start; }
.contact-info .item { display: flex; gap: 15px; margin-bottom: 22px; }
.contact-info .item-icon {
  flex-shrink: 0; width: 46px; height: 46px; border-radius: 11px;
  background: var(--primary-soft); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
}
.contact-info .item-icon svg { width: 22px; height: 22px; }
.contact-info .item h4 { color: var(--heading); font-size: 16px; margin-bottom: 2px; }
.contact-info .item p { color: var(--muted); font-size: 15px; }

.form-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 34px 30px;
}
.form-card h3 { font-size: 20px; margin-bottom: 22px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--text); margin-bottom: 7px; font-weight: 600; }
.field label .req { color: #d64541; }
.field input, .field textarea {
  width: 100%; padding: 13px 15px;
  background: #fff; border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); font-size: 15px; font-family: inherit; color: var(--text);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
  -webkit-appearance: none;
}
.field input::placeholder, .field textarea::placeholder { color: #a6b0ab; }
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(26, 107, 71, 0.1);
}
.field textarea { resize: vertical; min-height: 130px; }
.honeypot { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }
.form-msg { display: none; padding: 14px 16px; border-radius: var(--radius-sm); margin-top: 16px; font-size: 15px; }
.form-msg.success { display: block; background: #e8f5ee; color: var(--primary); border: 1px solid rgba(26, 107, 71, 0.25); }
.form-msg.error { display: block; background: #fdeeee; color: #c0392b; border: 1px solid rgba(192, 57, 43, 0.25); }

/* ============ 关于页 ============ */
.about-intro { display: grid; grid-template-columns: 1.2fr 1fr; gap: 44px; align-items: center; }
.about-intro h2 { font-size: 26px; margin-bottom: 16px; }
.about-intro p { color: var(--muted); margin-bottom: 14px; }
.about-visual {
  background: var(--primary);
  border-radius: var(--radius);
  color: #fff; padding: 56px 40px; text-align: center;
}
.about-visual .big { font-size: 50px; font-weight: 700; line-height: 1.15; letter-spacing: 6px; color: #fff; }
.about-visual .small { color: rgba(255,255,255,0.8); margin-top: 12px; letter-spacing: 3px; }

.value-list li {
  padding: 14px 0; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px; color: var(--text); font-size: 16px;
}
.value-list li::before { content: "✓"; color: var(--primary); font-weight: 700; flex-shrink: 0; }

/* ============ 产品页 ============ */
.product-card { overflow: hidden; display: flex; flex-direction: column; }
.product-card .card-icon svg { width: 28px; height: 28px; }
.product-card .tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; }
.product-card .tag {
  font-size: 12.5px; padding: 4px 12px; background: var(--bg-soft);
  border: 1px solid var(--border); border-radius: 999px; color: var(--muted);
}

/* ============ 页脚 ============ */
.footer { background: #10241b; color: #a8b5ae; padding: 56px 0 26px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 36px; margin-bottom: 36px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer p { font-size: 14px; line-height: 1.9; }
.footer a { display: block; font-size: 14px; padding: 4px 0; color: #a8b5ae; transition: color .18s var(--ease); }
.footer a:hover { color: #fff; }
.footer .logo { color: #fff; margin-bottom: 14px; }
.footer .logo-mark { background: #fff; color: var(--primary); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 20px;
  text-align: center; font-size: 13px; color: #7c8a82; line-height: 1.9;
}
.footer-bottom a { display: inline; color: #7c8a82; }

/* ============ 移动端适配 ============ */
@media (max-width: 920px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .contact-wrap, .about-intro { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  body { font-size: 15px; }
  .header-inner { height: 58px; }
  .logo { font-size: 17px; }
  .logo-mark { width: 31px; height: 31px; font-size: 15px; }

  .nav {
    display: none; position: fixed; top: 58px; left: 0; right: 0;
    background: #fff;
    flex-direction: column; padding: 8px 16px 22px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 18px 30px rgba(20, 32, 26, 0.08);
  }
  .nav.open { display: flex; }
  .nav a { padding: 15px 12px; font-size: 16px; border-bottom: 1px solid var(--border); border-radius: 0; text-align: left; }
  .nav a:last-child { border-bottom: none; }
  .nav a::after { display: none; }
  .nav a.active { background: var(--primary-soft); color: var(--primary); }
  .nav-toggle { display: flex; }

  .hero { padding: 64px 0 60px; }
  .hero p { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .baidu-search { margin-top: 28px; }
  .baidu-search button { padding: 0 18px; font-size: 13px; }

  .section { padding: 64px 0; }
  .section-head { margin-bottom: 36px; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .card { padding: 26px 22px; }
  .stats { gap: 18px; padding: 30px 16px; }
  .stat .num { font-size: 32px; }
  .about-visual .big { font-size: 40px; }
  .form-card { padding: 24px 20px; }
  .field input, .field textarea { font-size: 16px; }
  .footer-inner { grid-template-columns: 1fr; gap: 26px; }
}

@media (min-width: 1400px) {
  .hero h1 { font-size: 58px; }
}