/* =========================================================
   泰安市肥沃农业科技有限公司 · 官网样式
   纯手写 CSS，无任何外部依赖
   ========================================================= */

:root {
  --green-900: #123e2a;
  --green-800: #17563a;
  --green-700: #1f6b43;
  --green-600: #2c8555;
  --green-500: #3f9c67;
  --green-200: #bfe3c6;
  --green-100: #e6f4e9;
  --leaf: #8cc47f;
  --earth: #c8a97e;
  --earth-soft: #f3ece0;

  --ink: #12261c;
  --ink-2: #3c5045;
  --ink-3: #6b8076;

  --bg: #f7faf7;
  --bg-alt: #f1f7f2;
  --surface: #ffffff;
  --line: #e2ebe4;

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;

  --shadow-sm: 0 1px 2px rgba(18, 62, 42, .06), 0 4px 12px rgba(18, 62, 42, .05);
  --shadow: 0 2px 6px rgba(18, 62, 42, .06), 0 14px 34px rgba(18, 62, 42, .08);
  --shadow-lg: 0 8px 20px rgba(18, 62, 42, .08), 0 30px 60px rgba(18, 62, 42, .12);

  --wrap: 1120px;
  --header-h: 72px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--green-700); text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.3; letter-spacing: -.01em; font-weight: 700; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--green-700);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(247, 250, 247, .72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, .88);
  border-bottom-color: var(--line);
  box-shadow: 0 6px 24px rgba(18, 62, 42, .06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
}

.brand { display: flex; align-items: center; gap: 12px; color: var(--green-800); }
.brand-mark { color: var(--green-700); flex: none; }
.brand-mark svg { border-radius: 9px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 17px; color: var(--ink); letter-spacing: .02em; }
.brand-text em {
  font-style: normal;
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--ink-3);
  text-transform: uppercase;
}

.nav { display: flex; align-items: center; gap: 6px; }
.nav > a {
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 15px;
  color: var(--ink-2);
  transition: color .2s var(--ease), background .2s var(--ease);
}
.nav > a:hover { color: var(--green-700); background: var(--green-100); }
.nav > a[data-active] { color: var(--green-700); background: var(--green-100); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-left: 8px;
  background: var(--green-700) !important;
  color: #fff !important;
  font-weight: 600;
  padding: 10px 18px !important;
  box-shadow: 0 6px 16px rgba(31, 107, 67, .25);
}
.nav-cta:hover { background: var(--green-800) !important; transform: translateY(-1px); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  cursor: pointer;
  padding: 0;
  place-items: center;
  /* ★ 三根横杠必须靠 align-content 居中：只写 place-items 时，
     grid 的自动行会被 align-content:normal(=stretch) 拉伸填满按钮，
     三根 2px 的杠被推到 ~11px 行距，视觉上"散开"。 */
  align-content: center;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 20px; height: 2px;
  background: var(--ink);
  border-radius: 1.5px;
  transition: transform .28s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------------- 首屏 ---------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 76px) 0 96px;
  background: linear-gradient(170deg, #eef7ef 0%, #f7faf7 42%, #f4f8f4 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(115% 78% at 88% -8%, rgba(140, 196, 127, .34) 0%, rgba(140, 196, 127, 0) 62%),
    radial-gradient(85% 62% at 4% 6%, rgba(200, 169, 126, .20) 0%, rgba(200, 169, 126, 0) 58%);
}
/* 田垄纹理 */
.hero-bg::after {
  content: "";
  position: absolute;
  inset: auto 0 -1px 0;
  height: 46%;
  background-image: repeating-linear-gradient(
    104deg,
    rgba(31, 107, 67, .055) 0 1px,
    rgba(31, 107, 67, 0) 1px 22px
  );
  mask-image: linear-gradient(to top, rgba(0, 0, 0, .9), rgba(0, 0, 0, 0));
  -webkit-mask-image: linear-gradient(to top, rgba(0, 0, 0, .9), rgba(0, 0, 0, 0));
}
.hero-inner { position: relative; max-width: 880px; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--green-700);
  background: rgba(255, 255, 255, .78);
  border: 1px solid var(--green-200);
  padding: 7px 16px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}
.hero-eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green-500);
}

.hero-title {
  margin: 26px 0 0;
  font-size: clamp(20px, 5.4vw, 48px);
  line-height: 1.32;
  letter-spacing: -.015em;
  color: var(--ink);
}
.hero-title .accent {
  color: var(--green-700);
  white-space: normal;
  background-image: linear-gradient(90deg, rgba(140, 196, 127, .5), rgba(140, 196, 127, .16));
  background-repeat: no-repeat;
  background-position: 0 88%;
  background-size: 100% .2em;
  border-radius: 3px;
  padding: 0 .06em;
}

.hero-sub {
  margin: 26px 0 0;
  max-width: 620px;
  font-size: clamp(15.5px, 1.6vw, 18px);
  color: var(--ink-2);
  line-height: 1.85;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  border-radius: 999px;
  font-size: 15.5px;
  font-weight: 600;
  transition: transform .22s var(--ease), box-shadow .22s var(--ease), background .22s var(--ease), color .22s var(--ease);
}
.btn-primary {
  background: linear-gradient(135deg, var(--green-600), var(--green-800));
  color: #fff;
  box-shadow: 0 10px 24px rgba(23, 86, 58, .28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(23, 86, 58, .32); }
.btn-ghost {
  background: rgba(255, 255, 255, .8);
  color: var(--green-800);
  border: 1px solid var(--green-200);
}
.btn-ghost:hover { background: #fff; transform: translateY(-2px); box-shadow: var(--shadow-sm); }

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 34px;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid rgba(31, 107, 67, .12);
}
.hero-badges li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-2);
}
.hero-badges li::before {
  content: "";
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--green-100) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%231f6b43' d='M9.6 16.2 5.4 12l-1.4 1.4 5.6 5.6L20.4 7.8 19 6.4z'/%3E%3C/svg%3E") center / 13px no-repeat;
  border: 1px solid var(--green-200);
}

/* ---------------- 通用区块 ---------------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

.section-head { max-width: 720px; margin-bottom: 52px; }
.section-eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--green-600);
  text-transform: uppercase;
}
.section-title {
  margin-top: 12px;
  font-size: clamp(26px, 3.6vw, 38px);
  color: var(--ink);
}
.section-lead {
  margin-top: 18px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.25fr .95fr;
  gap: 64px;
  align-items: start;
}

/* 关于我们 · 要点 */
.ticks { margin-top: 30px; display: grid; gap: 16px; }
.ticks li {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  font-size: 15.5px;
  color: var(--ink-2);
}
.tick {
  flex: none;
  width: 22px; height: 22px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--green-100) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%231f6b43' d='M9.6 16.2 5.4 12l-1.4 1.4 5.6 5.6L20.4 7.8 19 6.4z'/%3E%3C/svg%3E") center / 14px no-repeat;
  border: 1px solid var(--green-200);
}

/* 关于我们 · 信息卡 */
.about-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
}
.about-card-head {
  display: flex;
  align-items: center;
  gap: 11px;
  padding-bottom: 20px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--line);
  color: var(--green-700);
}
.about-card-head h3 { font-size: 17px; color: var(--ink); }

.info-list { display: grid; gap: 2px; }
.info-list > div {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}
.info-list > div:last-child { border-bottom: 0; padding-bottom: 0; }
.info-list dt { font-size: 14px; color: var(--ink-3); }
.info-list dd { margin: 0; font-size: 15px; color: var(--ink); font-weight: 500; }
.info-list dd a { font-weight: 700; }

/* ---------------- 业务卡片 ---------------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 22px;
}
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px 28px;
  overflow: hidden;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease), border-color .28s var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--green-500), var(--leaf));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .38s var(--ease);
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--green-200);
}
.card:hover::before { transform: scaleX(1); }

.card-icon {
  display: grid;
  place-items: center;
  width: 50px; height: 50px;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--green-100), #f6fbf6);
  border: 1px solid var(--green-200);
  color: var(--green-700);
  margin-bottom: 20px;
}
.card h3 { font-size: 17.5px; margin-bottom: 10px; }
.card p { font-size: 15px; color: var(--ink-2); line-height: 1.8; }

/* ---------------- 联系 ---------------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}
.contact-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease), border-color .28s var(--ease);
}
a.contact-card:hover {
  transform: translateY(-5px);
  border-color: var(--green-200);
  box-shadow: var(--shadow-lg);
}
.contact-icon {
  display: grid;
  place-items: center;
  width: 46px; height: 46px;
  border-radius: 13px;
  background: var(--green-100);
  border: 1px solid var(--green-200);
  color: var(--green-700);
  margin-bottom: 6px;
}
.contact-label { font-size: 13.5px; color: var(--ink-3); letter-spacing: .04em; }
.contact-value { font-size: 22px; font-weight: 800; color: var(--ink); letter-spacing: -.01em; }
.contact-value--sm { font-size: 16.5px; line-height: 1.6; font-weight: 700; }
.contact-note { font-size: 14px; color: var(--ink-3); }

/* ---------------- 页脚 ---------------- */
.site-footer {
  background: var(--green-900);
  color: rgba(255, 255, 255, .78);
  padding: 54px 0 40px;
  font-size: 14.5px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 30px;
  align-items: start;
}
.footer-brand strong { color: #fff; font-size: 17px; display: block; }
.footer-brand p { margin-top: 8px; color: rgba(255, 255, 255, .6); font-size: 14px; }
.footer-meta { display: grid; gap: 7px; }
.footer-meta p { line-height: 1.7; }
.footer-meta a, .icp-filing a { color: var(--green-200); font-weight: 700; }
.footer-meta a:hover { text-decoration: underline; }
.copyright {
  margin-top: 12px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  color: rgba(255, 255, 255, .52);
  font-size: 13.5px;
}
.footer-brand .icp-filing {
  margin-top: 10px;
  color: rgba(255, 255, 255, .72);
  font-size: 13.5px;
  line-height: 1.7;
}
.icp-filing a { text-decoration: underline; text-underline-offset: 3px; }

/* ---------------- 返回顶部 ---------------- */
.back-top {
  position: fixed;
  right: 22px; bottom: 22px;
  z-index: 90;
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--green-700);
  color: #fff;
  box-shadow: 0 10px 24px rgba(18, 62, 42, .28);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
}
.back-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { background: var(--green-800); }

/* ---------------- 入场动画 ---------------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; gap: 22px; }
}

@media (max-width: 760px) {
  :root { --header-h: 64px; }
  .wrap { padding: 0 20px; }

  .nav-toggle { display: grid; }
  .nav {
    position: absolute;
    top: var(--header-h);
    left: 12px; right: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .26s var(--ease), transform .26s var(--ease), visibility .26s;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav > a { padding: 12px 14px; border-radius: var(--radius-sm); }
  .nav-cta { margin: 6px 0 0; justify-content: center; }

  .hero { padding: calc(var(--header-h) + 48px) 0 68px; }
  .hero-badges { gap: 10px 22px; margin-top: 34px; padding-top: 22px; }
  .hero-actions .btn { flex: 1 1 100%; }

  .section { padding: 68px 0; }
  .section-head { margin-bottom: 36px; }
  .about-card { padding: 24px 22px; }
  .card { padding: 26px 22px; }
  .contact-card { padding: 26px 22px; }
}

@media (max-width: 420px) {
  .info-list > div { grid-template-columns: 1fr; gap: 4px; }
  .brand-text em { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

@media print {
  .site-header, .back-top, .nav-toggle { display: none; }
  .reveal { opacity: 1; transform: none; }
}