/* ========== 发财树种植养护知识网站 样式 ========== */
:root {
  --green-900: #1b5e20;
  --green-800: #2e7d32;
  --green-700: #388e3c;
  --green-600: #43a047;
  --green-500: #66bb6a;
  --green-100: #c8e6c9;
  --green-50:  #f1f8f2;
  --gold:      #f9a825;
  --gold-dark: #f57f17;
  --ink:       #21301f;
  --ink-soft:  #4b5c48;
  --white:     #ffffff;
  --card-shadow: 0 6px 24px rgba(27, 94, 32, .10);
  --radius: 16px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: #fbfdf9;
  line-height: 1.75;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--green-700); text-decoration: none; }
a:hover { color: var(--green-900); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--green-100);
  transition: box-shadow .3s;
}
.site-header.scrolled { box-shadow: 0 4px 18px rgba(27,94,32,.12); }
.nav-inner {
  max-width: 1180px; margin: 0 auto; padding: 10px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; color: var(--green-900); }
.brand svg { width: 38px; height: 38px; }
.main-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.main-nav a {
  padding: 8px 13px; border-radius: 999px; font-size: .95rem; color: var(--ink-soft);
  transition: all .25s;
}
.main-nav a:hover, .main-nav a.active { background: var(--green-100); color: var(--green-900); }
.nav-toggle {
  display: none; background: none; border: none; cursor: pointer; padding: 8px;
  border-radius: 10px;
}
.nav-toggle svg { width: 26px; height: 26px; stroke: var(--green-800); }
.nav-toggle:hover { background: var(--green-50); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #e8f5e9 0%, #f1f8e9 55%, #fffde7 100%);
  padding: 72px 20px 88px;
}
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%; pointer-events: none;
}
.hero::before {
  width: 420px; height: 420px; right: -120px; top: -140px;
  background: radial-gradient(circle, rgba(102,187,106,.28), transparent 70%);
  animation: float 9s ease-in-out infinite;
}
.hero::after {
  width: 300px; height: 300px; left: -100px; bottom: -110px;
  background: radial-gradient(circle, rgba(249,168,37,.20), transparent 70%);
  animation: float 11s ease-in-out infinite reverse;
}
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(18px); } }
.hero-inner {
  position: relative; z-index: 1;
  max-width: 1180px; margin: 0 auto;
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center;
}
.hero-kicker {
  display: inline-block; background: var(--white); border: 1px solid var(--green-100);
  color: var(--green-800); font-size: .85rem; padding: 5px 14px; border-radius: 999px;
  margin-bottom: 18px; box-shadow: var(--card-shadow);
}
.hero h1 {
  font-size: clamp(1.9rem, 4.2vw, 3rem); line-height: 1.3; color: var(--green-900);
  letter-spacing: 2px;
}
.hero h1 em { font-style: normal; color: var(--gold-dark); }
.hero p.lead { margin: 18px 0 28px; color: var(--ink-soft); font-size: 1.05rem; max-width: 34em; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 999px; font-weight: 600;
  transition: transform .25s, box-shadow .25s;
}
.btn-primary { background: linear-gradient(135deg, var(--green-600), var(--green-800)); color: #fff; box-shadow: 0 8px 20px rgba(46,125,50,.35); }
.btn-primary:hover { transform: translateY(-3px); color: #fff; box-shadow: 0 12px 26px rgba(46,125,50,.45); }
.btn-ghost { border: 1.5px solid var(--green-700); color: var(--green-800); background: rgba(255,255,255,.7); }
.btn-ghost:hover { background: var(--green-100); transform: translateY(-3px); }
.hero-art { position: relative; filter: drop-shadow(0 18px 30px rgba(27,94,32,.18)); animation: float 7s ease-in-out infinite; }
.hero-stats { display: flex; gap: 26px; margin-top: 34px; flex-wrap: wrap; }
.stat b { font-size: 1.5rem; color: var(--green-800); font-family: Georgia, serif; }
.stat span { display: block; font-size: .85rem; color: var(--ink-soft); }

/* ---------- 通用板块 ---------- */
section.block { padding: 76px 20px; }
section.block:nth-of-type(even) { background: var(--white); }
section.block:nth-of-type(odd) { background: #f4faf3; }
.wrap { max-width: 1180px; margin: 0 auto; }
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 46px; }
.sec-tag {
  display: inline-block; font-size: .8rem; letter-spacing: 4px; color: var(--green-600);
  text-transform: uppercase; margin-bottom: 10px; font-weight: 700;
}
.sec-head h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); color: var(--green-900); margin-bottom: 12px; letter-spacing: 1px; }
.sec-head h2 .num { color: var(--gold-dark); font-family: Georgia, serif; margin-right: 8px; }
.sec-head p { color: var(--ink-soft); }

/* 卡片网格 */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--white); border-radius: var(--radius); padding: 26px;
  box-shadow: var(--card-shadow); border: 1px solid #e7f1e7;
  transition: transform .3s, box-shadow .3s;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 14px 34px rgba(27,94,32,.16); }
.card .icon {
  width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: var(--green-100); margin-bottom: 16px;
}
.card .icon svg { width: 28px; height: 28px; }
.card h3 { color: var(--green-900); font-size: 1.12rem; margin-bottom: 10px; }
.card p, .card li { color: var(--ink-soft); font-size: .95rem; }
.card ul { padding-left: 1.2em; }

/* 百科信息条 */
.info-list { list-style: none; margin-top: 10px; }
.info-list li { padding: 7px 0; border-bottom: 1px dashed #dcead9; display: flex; gap: 10px; flex-wrap: wrap; }
.info-list li:last-child { border-bottom: none; }
.info-list b { color: var(--green-800); flex-shrink: 0; }
.fengshui { border-left: 4px solid var(--gold); }
.fengshui.good { border-left-color: var(--green-600); }
.fengshui.bad { border-left-color: #e53935; }

/* 步骤流程 */
.steps { counter-reset: step; }
.step { display: flex; gap: 18px; padding: 18px 0; border-bottom: 1px dashed #dcead9; }
.step:last-child { border-bottom: none; }
.step-no {
  counter-increment: step; flex-shrink: 0;
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--green-600), var(--green-800)); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1.05rem;
  box-shadow: 0 6px 14px rgba(46,125,50,.3);
}
.step-no::before { content: counter(step); }
.step h4 { color: var(--green-900); margin-bottom: 4px; font-size: 1.02rem; }
.step p { color: var(--ink-soft); font-size: .93rem; }

/* 表格 */
.table-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--card-shadow); background: var(--white); }
table { width: 100%; border-collapse: collapse; min-width: 640px; font-size: .93rem; }
thead th { background: linear-gradient(135deg, var(--green-700), var(--green-800)); color: #fff; padding: 14px 16px; text-align: left; white-space: nowrap; }
tbody td { padding: 13px 16px; border-bottom: 1px solid #eaf3e8; color: var(--ink-soft); vertical-align: top; }
tbody tr:nth-child(even) { background: var(--green-50); }
tbody tr:hover { background: var(--green-100); }
tbody td:first-child { color: var(--green-900); font-weight: 600; }

/* 四季卡片 */
.season { position: relative; overflow: hidden; }
.season .season-badge {
  position: absolute; top: 18px; right: 18px; width: 54px; height: 54px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 1.5rem;
  background: #fff; box-shadow: var(--card-shadow);
}
.season ul { list-style: none; margin-top: 8px; }
.season ul li { padding: 8px 0 8px 26px; position: relative; border-bottom: 1px dashed #e2eedf; font-size: .93rem; }
.season ul li:last-child { border-bottom: none; }
.season ul li::before { content: "🌿"; position: absolute; left: 0; font-size: .9rem; }
.season.spring h3 { color: #2e7d32; } .season.summer h3 { color: #e65100; }
.season.autumn h3 { color: #bf360c; } .season.winter h3 { color: #1565c0; }
.season.spring { border-top: 4px solid #66bb6a; }
.season.summer { border-top: 4px solid #ffb74d; }
.season.autumn { border-top: 4px solid #ff8a65; }
.season.winter { border-top: 4px solid #64b5f6; }

/* FAQ */
.faq-item {
  background: var(--white); border-radius: var(--radius); box-shadow: var(--card-shadow);
  margin-bottom: 14px; border: 1px solid #e7f1e7; overflow: hidden;
}
.faq-item summary {
  cursor: pointer; padding: 18px 22px; font-weight: 600; color: var(--green-900);
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
  transition: background .25s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.4rem; color: var(--green-600); transition: transform .3s; flex-shrink: 0; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary:hover { background: var(--green-50); }
.faq-body { padding: 0 22px 18px; color: var(--ink-soft); font-size: .95rem; }

/* 提示框 */
.tip {
  margin-top: 20px; padding: 16px 20px; border-radius: 12px; background: #fffde7;
  border: 1px solid #ffe082; color: #7a5c00; font-size: .93rem;
}
.tip b { color: var(--gold-dark); }
.danger { background: #ffebee; border-color: #ffcdd2; color: #8e2727; }
.danger b { color: #c62828; }

/* 页脚 */
.site-footer { background: #14361a; color: #cfe6cf; padding: 54px 20px 26px; }
.footer-inner { max-width: 1180px; margin: 0 auto; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.14); }
.site-footer h4 { color: #fff; margin-bottom: 14px; font-size: 1.02rem; }
.site-footer p, .site-footer li { font-size: .9rem; color: #b9d6ba; }
.site-footer ul { list-style: none; }
.site-footer ul li { padding: 4px 0; }
.site-footer a { color: #b9d6ba; transition: color .2s; }
.site-footer a:hover { color: #fff; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; color: #fff; font-weight: 700; font-size: 1.1rem; }
.footer-brand svg { width: 34px; height: 34px; }
.copyright { text-align: center; padding-top: 22px; font-size: .85rem; color: #9dbf9f; }

/* 返回顶部 */
#backTop {
  position: fixed; right: 22px; bottom: 26px; width: 46px; height: 46px; border-radius: 50%;
  border: none; cursor: pointer; background: linear-gradient(135deg, var(--green-600), var(--green-800));
  color: #fff; font-size: 1.15rem; box-shadow: 0 8px 20px rgba(46,125,50,.4);
  opacity: 0; visibility: hidden; transform: translateY(12px); transition: all .35s; z-index: 90;
}
#backTop.show { opacity: 1; visibility: visible; transform: translateY(0); }
#backTop:hover { transform: translateY(-4px); }

/* 入场动效 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-art, .hero::before, .hero::after { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero p.lead { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-stats { justify-content: center; }
  .hero-art { max-width: 380px; margin: 0 auto; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 12px 18px 18px;
    border-bottom: 1px solid var(--green-100); box-shadow: 0 14px 26px rgba(27,94,32,.14);
  }
  .main-nav.open { display: flex; animation: slideDown .3s ease; }
  @keyframes slideDown { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  section.block { padding: 56px 16px; }
  .hero { padding: 52px 16px 64px; }
}