/* =====================================================
   山东寿光蔬菜种业集团 · 全站样式
   高端 · 绿色生态 · 现代农业科技
   主色：森林绿 #1A5F3A · 辅助绿 #4A9D68 · 科技蓝 #2C4A73
   ===================================================== */

:root {
  /* 品牌主色 */
  --green-900: #0F3F26;
  --green-700: #1A5F3A;     /* 主绿 */
  --green-500: #2E7D4F;
  --green-400: #4A9D68;     /* 辅助绿 */
  --green-200: #B8DBC4;
  --green-50:  #EEF7F1;

  /* 科技色 */
  --tech-700: #1F3759;
  --tech-500: #2C4A73;
  --tech-400: #4A6B96;
  --tech-100: #DCE6F2;

  /* 中性色 */
  --bg:        #FFFFFF;
  --bg-soft:   #F7F9FA;
  --bg-card:   #FFFFFF;
  --line:      #E8EEF2;
  --line-soft: #EEF1F4;
  --text:      #2D3136;
  --text-sub:  #6B7280;
  --text-soft: #9AA3AF;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15,63,38,.06);
  --shadow:    0 4px 14px rgba(15,63,38,.08);
  --shadow-lg: 0 12px 36px rgba(15,63,38,.10);

  /* 圆角 */
  --r-sm: 6px;
  --r:    10px;
  --r-lg: 16px;

  /* 间距 */
  --gap-xs: .5rem;
  --gap-sm: 1rem;
  --gap:    1.5rem;
  --gap-lg: 2.5rem;
  --gap-xl: 4rem;

  /* 容器 */
  --container: 1240px;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Source Han Sans CN", "Noto Sans SC", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, picture, video { max-width: 100%; height: auto; display: block; }
a { color: var(--green-700); text-decoration: none; transition: color .2s; }
a:hover { color: var(--green-500); }
h1, h2, h3, h4 { margin: 0 0 .6em; line-height: 1.3; color: var(--green-900); font-weight: 700; }
h1 { font-size: clamp(1.8rem, 4.5vw, 2.6rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.4em; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--gap-xl) 0; }
.section-soft { background: var(--bg-soft); }
.section-dark { background: linear-gradient(135deg, var(--green-900) 0%, var(--tech-700) 100%); color: #fff; }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }

.section-title { text-align: center; margin-bottom: var(--gap-lg); }
.section-title h2 { margin-bottom: .4em; position: relative; display: inline-block; padding-bottom: .5em; }
.section-title h2::after {
  content: ''; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%);
  width: 48px; height: 3px; background: linear-gradient(90deg, var(--green-700), var(--green-400)); border-radius: 2px;
}
.section-title p { color: var(--text-sub); max-width: 720px; margin: 0 auto; }

.eyebrow {
  display: inline-block; font-size: .82rem; font-weight: 600; letter-spacing: .15em;
  color: var(--green-500); text-transform: uppercase; margin-bottom: .8em;
}

/* ===== Top bar ===== */
.top-bar {
  background: var(--green-900); color: rgba(255,255,255,.82);
  font-size: .85rem; padding: 8px 0;
}
.top-bar .container { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; align-items: center; }
.top-bar a { color: rgba(255,255,255,.95); }
.top-bar a:hover { color: var(--green-200); }
.top-bar-info::before { content: '🌱 '; }
.top-bar-tel { font-weight: 600; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 76px; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-logo { width: 48px; height: 48px; flex-shrink: 0; }
.brand-logo-full {
  height: 56px;
  width: auto;
  max-width: 360px;
  flex-shrink: 0;
  display: block;
}
.brand-text h1 {
  margin: 0; font-size: 1.05rem; color: var(--green-900); line-height: 1.2;
}
.brand-text .brand-en {
  font-size: .72rem; color: var(--text-sub); letter-spacing: .12em;
}
/* 屏幕阅读器可见、视觉隐藏 —— 用来保留 SEO 友好的 h1 */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}
@media (max-width: 768px) {
  .brand-logo-full { height: 44px; max-width: 240px; }
}
@media (max-width: 420px) {
  .brand-logo-full { height: 38px; max-width: 200px; }
}

.main-nav { flex: 1; display: flex; justify-content: center; }
.main-nav ul {
  list-style: none; padding: 0; margin: 0;
  display: flex; gap: 4px;
}
.main-nav a {
  display: block; padding: 10px 14px; font-size: .98rem; font-weight: 500;
  color: var(--text); border-radius: var(--r-sm); position: relative;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--green-700); background: var(--green-50);
}
.main-nav a.active::after {
  content: ''; position: absolute; left: 50%; bottom: 4px; transform: translateX(-50%);
  width: 16px; height: 2px; background: var(--green-700); border-radius: 1px;
}

.header-cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px; background: var(--green-700); color: #fff;
  border-radius: var(--r); font-weight: 600; font-size: .92rem;
  box-shadow: var(--shadow-sm);
}
.header-cta:hover { background: var(--green-900); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow); }

.menu-toggle {
  display: none; background: none; border: 0; cursor: pointer; padding: 8px;
  color: var(--text);
}
.menu-toggle svg { width: 28px; height: 28px; }

@media (max-width: 980px) {
  .menu-toggle { display: block; }
  .main-nav {
    position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; border-top: 1px solid var(--line);
    flex-direction: column; padding: 12px 24px;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: all .25s; box-shadow: var(--shadow);
  }
  .main-nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .main-nav ul { flex-direction: column; gap: 0; width: 100%; }
  .main-nav a { padding: 14px 12px; border-bottom: 1px solid var(--line-soft); border-radius: 0; }
  .header-cta { display: none; }
  .top-bar-info { display: none; }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 620px;
  display: flex; align-items: center;
  background:
    linear-gradient(135deg, rgba(15,63,38,.78) 0%, rgba(31,55,89,.72) 100%),
    url('../images/group/aerial.webp') center/cover no-repeat;
  color: #fff; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse at top right, rgba(74,157,104,.18), transparent 60%);
}
.hero .container { position: relative; z-index: 2; padding-top: 60px; padding-bottom: 60px; }
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem); color: #fff;
  margin-bottom: .5em; max-width: 960px; line-height: 1.2;
}
.hero h1 .highlight {
  background: linear-gradient(90deg, var(--green-200), #fff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-subtitle {
  font-size: 1.1rem; max-width: 760px; color: rgba(255,255,255,.92);
  margin-bottom: 1.6em; line-height: 1.85;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 2em; }
.hero-tag {
  display: inline-flex; align-items: center; padding: 6px 14px;
  background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.22);
  border-radius: 999px; font-size: .85rem; backdrop-filter: blur(6px);
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--r); font-weight: 600;
  font-size: .98rem; transition: all .2s; cursor: pointer; border: 0;
  text-align: center; white-space: nowrap;
}
.btn-primary { background: var(--green-400); color: #fff; box-shadow: 0 4px 14px rgba(74,157,104,.35); }
.btn-primary:hover { background: var(--green-500); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(74,157,104,.45); }
.btn-outline { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.5); }
.btn-outline:hover { background: rgba(255,255,255,.12); color: #fff; border-color: #fff; }
.btn-green { background: var(--green-700); color: #fff; }
.btn-green:hover { background: var(--green-900); color: #fff; }
.btn-ghost { background: transparent; color: var(--green-700); border: 1.5px solid var(--green-200); }
.btn-ghost:hover { background: var(--green-50); }

.hero-stats {
  display: flex; flex-wrap: wrap; gap: 32px; margin-top: 2.5em;
  padding-top: 2em; border-top: 1px solid rgba(255,255,255,.18);
}
.hero-stat { color: #fff; }
.hero-stat strong {
  display: block; font-size: 2rem; font-weight: 800; color: var(--green-200);
  line-height: 1.1; margin-bottom: 4px;
}
.hero-stat span { font-size: .9rem; opacity: .85; }

/* ===== Cards / Grids ===== */
.grid { display: grid; gap: var(--gap); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 28px;
  transition: all .25s; display: block;
}
.card:hover {
  transform: translateY(-3px); box-shadow: var(--shadow);
  border-color: var(--green-200);
}
.card h3 { color: var(--green-900); margin-bottom: .5em; }
.card p { color: var(--text-sub); margin-bottom: .8em; line-height: 1.75; }
.card-link {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--green-700); font-weight: 600; font-size: .92rem;
}
.card-link::after { content: '→'; transition: transform .2s; }
.card:hover .card-link::after { transform: translateX(4px); }
.card-icon {
  width: 52px; height: 52px; border-radius: 12px;
  background: linear-gradient(135deg, var(--green-50), var(--green-200));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; margin-bottom: 16px; color: var(--green-700);
}

/* ===== Product Cards ===== */
.product-grid {
  display: grid; gap: 20px;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}
.product-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden;
  transition: all .25s; display: block; color: var(--text);
}
.product-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-lg);
  border-color: var(--green-400); color: var(--text);
}
.product-img {
  aspect-ratio: 1 / 1; background: var(--bg-soft); overflow: hidden; position: relative;
}
.product-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s ease;
}
.product-card:hover .product-img img { transform: scale(1.05); }
.product-tag {
  position: absolute; top: 12px; left: 12px;
  padding: 4px 10px; background: rgba(26,95,58,.92); color: #fff;
  border-radius: var(--r-sm); font-size: .72rem; font-weight: 600;
  backdrop-filter: blur(4px);
}
.product-tag.tomato   { background: rgba(204,67,67,.92); }
.product-tag.pepper   { background: rgba(208,80,40,.92); }
.product-tag.cucumber { background: rgba(60,140,80,.92); }
.product-tag.eggplant { background: rgba(108,67,140,.92); }
.product-tag.radish   { background: rgba(106,123,151,.92); }
.product-tag.rootstock{ background: rgba(94,76,62,.92); }
.product-tag.watermelon { background: rgba(46,93,52,.92); }
.product-tag.other    { background: rgba(108,117,125,.92); }

.product-body { padding: 16px 18px 20px; }
.product-body h3 { font-size: 1.05rem; margin-bottom: 4px; color: var(--green-900); }
.product-body .product-meta {
  font-size: .82rem; color: var(--text-soft); margin-bottom: 8px;
}
.product-body p { font-size: .88rem; color: var(--text-sub); margin: 0; line-height: 1.6; }

/* ===== Highlights / Stats ===== */
.stats-bar {
  background: linear-gradient(135deg, var(--green-900), var(--tech-700));
  color: #fff; padding: 50px 0;
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px;
  text-align: center;
}
@media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
.stat-item .num {
  display: block; font-size: 2.4rem; font-weight: 800;
  background: linear-gradient(90deg, #fff, var(--green-200));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  line-height: 1.1;
}
.stat-item .label { display: block; margin-top: 6px; font-size: .92rem; opacity: .88; }

/* ===== Feature Block (split) ===== */
.feature-split {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-lg); align-items: center;
}
@media (max-width: 980px) { .feature-split { grid-template-columns: 1fr; } }
.feature-split.reverse > :first-child { order: 2; }
@media (max-width: 980px) { .feature-split.reverse > :first-child { order: 0; } }
.feature-img { border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow); }
.feature-img img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; }
.feature-text h2 { margin-bottom: .4em; }
.feature-text p { color: var(--text-sub); }

/* ===== Stripe / Trust strip ===== */
.trust-strip {
  background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 28px 0;
}
.trust-strip .container {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  text-align: center;
}
@media (max-width: 768px) { .trust-strip .container { grid-template-columns: repeat(2, 1fr); } }
.trust-item { display: flex; flex-direction: column; gap: 4px; }
.trust-item strong { color: var(--green-900); font-size: 1rem; }
.trust-item span { font-size: .85rem; color: var(--text-sub); }

/* ===== FAQ ===== */
.faq-list { max-width: 880px; margin: 0 auto; }
.faq-item {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r); margin-bottom: 14px; overflow: hidden;
  transition: border-color .2s, box-shadow .2s;
}
.faq-item[open] { border-color: var(--green-400); box-shadow: 0 4px 18px rgba(26,95,58,.08); }
.faq-item > summary {
  list-style: none;
  padding: 18px 56px 18px 22px; cursor: pointer; position: relative;
  font-size: 1rem; font-weight: 600; color: var(--green-900);
  line-height: 1.5;
}
.faq-item > summary::-webkit-details-marker { display: none; }
.faq-item > summary::after {
  content: '+'; position: absolute; right: 22px; top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem; color: var(--green-700); font-weight: 300;
  transition: transform .2s;
}
.faq-item[open] > summary::after { content: '−'; }
.faq-item > summary:hover { color: var(--green-700); }
.faq-answer {
  padding: 0 22px 18px;
  color: var(--text-sub);
  border-top: 1px solid var(--line);
}
.faq-answer p { margin: 14px 0 0; }

/* 老的 .faq-q / .faq-a 类保留兼容（如果有旧页面用） */
.faq-q {
  width: 100%; background: none; border: 0; cursor: pointer;
  padding: 18px 22px; font-size: 1rem; font-weight: 600; color: var(--green-900);
  text-align: left; display: flex; justify-content: space-between; align-items: center;
  font-family: inherit;
}
.faq-q::after {
  content: '+'; font-size: 1.3rem; color: var(--green-700); font-weight: 400;
}
.faq-item.is-open .faq-q::after { content: '−'; }
.faq-a {
  padding: 0 22px; max-height: 0; overflow: hidden; transition: all .3s;
  color: var(--text-sub);
}
.faq-item.is-open .faq-a { padding: 0 22px 18px; max-height: 600px; }
.faq-a p { margin-bottom: 0; }

/* ===== Certificate gallery ===== */
.cert-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}
.cert-item {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r); padding: 12px; text-align: center;
  transition: all .2s; display: block;
}
.cert-item:hover { box-shadow: var(--shadow); border-color: var(--green-200); }
.cert-item img {
  width: 100%; aspect-ratio: 3/4; object-fit: contain;
  background: var(--bg-soft); border-radius: var(--r-sm);
}
.cert-item .cert-name {
  display: block; font-size: .86rem; font-weight: 600; color: var(--green-900);
  margin-top: 10px;
}

/* ===== Honor wall ===== */
.honor-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}
.honor-item {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r); overflow: hidden; padding: 16px;
  transition: all .2s;
}
.honor-item:hover { box-shadow: var(--shadow); border-color: var(--green-200); }
.honor-item img {
  width: 100%; aspect-ratio: 4/3; object-fit: contain;
  background: var(--bg-soft); border-radius: var(--r-sm);
}
.honor-item .honor-name {
  display: block; font-size: .9rem; font-weight: 600; margin-top: 12px;
  color: var(--green-900); text-align: center;
}
.honor-item .honor-meta {
  display: block; margin-top: 6px; font-size: .78rem; line-height: 1.5;
  color: var(--text-sub); text-align: center;
}

/* ===== Process steps ===== */
.process-flow {
  display: grid; gap: 16px;
  grid-template-columns: repeat(5, 1fr);
}
@media (max-width: 980px) { .process-flow { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .process-flow { grid-template-columns: 1fr; } }
.process-step {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r); padding: 24px 18px; text-align: center;
  position: relative;
}
.process-num {
  width: 40px; height: 40px; line-height: 40px; margin: 0 auto 12px;
  border-radius: 50%; background: var(--green-700); color: #fff;
  font-weight: 700; font-size: 1.05rem;
}
.process-step h4 { font-size: 1rem; margin-bottom: 6px; color: var(--green-900); }
.process-step p { font-size: .85rem; color: var(--text-sub); margin: 0; }

/* ===== Tech section ===== */
.tech-bg {
  background:
    linear-gradient(135deg, rgba(31,55,89,.96), rgba(15,63,38,.94)),
    url('../images/group/lab.webp') center/cover no-repeat;
  color: #fff;
}
.tech-bg h2, .tech-bg h3 { color: #fff; }
.tech-bg .card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(8px);
}
.tech-bg .card h3 { color: #fff; }
.tech-bg .card p { color: rgba(255,255,255,.82); }
.tech-bg .eyebrow { color: var(--green-200); }

/* ===== Tags / Pills ===== */
.tag {
  display: inline-block; padding: 3px 10px;
  background: var(--green-50); color: var(--green-700);
  border-radius: 999px; font-size: .78rem; font-weight: 600;
  margin: 2px;
}
.tag-blue { background: var(--tech-100); color: var(--tech-700); }

/* ===== Breadcrumb ===== */
.breadcrumb {
  font-size: .88rem; color: var(--text-sub); padding: 18px 0;
  background: var(--bg-soft); border-bottom: 1px solid var(--line-soft);
}
.breadcrumb a { color: var(--green-700); }
.breadcrumb .sep { margin: 0 8px; color: var(--text-soft); }
.breadcrumb .current { color: var(--text); }

/* ===== Page hero (inner pages) ===== */
.page-hero {
  background:
    linear-gradient(135deg, rgba(15,63,38,.85) 0%, rgba(31,55,89,.78) 100%),
    url('../images/group/panorama.webp') center/cover no-repeat;
  color: #fff; padding: 80px 0;
  text-align: center;
}
.page-hero h1 { color: #fff; }
.page-hero p { color: rgba(255,255,255,.92); max-width: 760px; margin: 0 auto; font-size: 1.05rem; }

/* ===== CTA ===== */
.cta-band {
  background: linear-gradient(135deg, var(--green-700), var(--tech-700));
  color: #fff; padding: 60px 0; text-align: center;
}
.cta-band h2 { color: #fff; margin-bottom: .4em; }
.cta-band p { color: rgba(255,255,255,.92); max-width: 720px; margin: 0 auto 1.5em; }
.cta-band .btn-primary { background: #fff; color: var(--green-700); }
.cta-band .btn-primary:hover { background: var(--green-50); color: var(--green-900); }

/* ===== Footer ===== */
.site-footer {
  background: var(--green-900); color: rgba(255,255,255,.78);
  padding: 60px 0 0; font-size: .92rem;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: var(--gap-lg);
  padding-bottom: 40px;
}
@media (max-width: 980px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 1em; }
.footer-col p, .footer-col li { color: rgba(255,255,255,.7); line-height: 1.9; margin: 0; }
.footer-col ul { list-style: none; padding: 0; }
.footer-col a { color: rgba(255,255,255,.82); }
.footer-col a:hover { color: var(--green-200); }

.footer-brand { display: flex; gap: 12px; align-items: center; margin-bottom: 1em; }
.footer-brand img { width: 44px; height: 44px; }
.footer-brand strong { color: #fff; font-size: 1.05rem; }
.footer-logo-full { width: auto !important; height: 48px !important; max-width: 280px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12); padding: 18px 0;
  display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between;
  font-size: .82rem; color: rgba(255,255,255,.6);
}
.footer-bottom a { color: rgba(255,255,255,.7); }

/* ===== Floating CTA ===== */
.float-cta {
  position: fixed; right: 18px; bottom: 24px; z-index: 50;
  display: flex; flex-direction: column; gap: 10px;
}
.float-btn {
  width: 50px; height: 50px; border-radius: 50%;
  background: var(--green-700); color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 18px rgba(15,63,38,.32);
  border: 0; cursor: pointer; transition: all .2s;
}
.float-btn:hover { background: var(--green-900); transform: scale(1.06); color: #fff; }
.float-btn svg { width: 22px; height: 22px; }
.float-btn.up { background: rgba(15,63,38,.7); opacity: 0; pointer-events: none; }
.float-btn.up.show { opacity: 1; pointer-events: auto; }

/* ===== AI cite block (GEO友好) ===== */
.ai-cite {
  background: var(--bg-soft); border-left: 4px solid var(--green-700);
  padding: 22px 26px; border-radius: 0 var(--r) var(--r) 0;
  margin: var(--gap) 0;
}
.ai-cite h2, .ai-cite h3 { margin-top: 0; }
.ai-cite ul { list-style: none; padding: 0; }
.ai-cite li {
  display: flex; gap: 12px; padding: 6px 0;
  border-bottom: 1px dashed var(--line);
}
.ai-cite li:last-child { border-bottom: 0; }
.ai-cite .k {
  flex: 0 0 130px; font-weight: 600; color: var(--green-900);
}
.ai-cite .v { flex: 1; color: var(--text); }

/* ===== Tables ===== */
.table-wrap {
  width: 100%; overflow-x: auto; border-radius: var(--r);
}
.data-table {
  width: 100%; border-collapse: collapse; background: #fff;
  border-radius: var(--r); overflow: hidden; box-shadow: var(--shadow-sm);
  font-size: .94rem;
}
.data-table th, .data-table td {
  padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--line);
}
.data-table th {
  background: var(--green-50); color: var(--green-900); font-weight: 600;
}
.data-table tr:last-child td { border-bottom: 0; }
.data-table tr:hover td { background: var(--bg-soft); }

/* ===== Helpers ===== */
.text-center { text-align: center; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-3 { margin-bottom: 1.5rem; }
.muted { color: var(--text-sub); }
.small { font-size: .88rem; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: .5rem; }
.gap-2 { gap: 1rem; }
.justify-between { justify-content: space-between; }
.items-center { align-items: center; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

/* ===== Animations ===== */
@media (prefers-reduced-motion: no-preference) {
  .fade-in { opacity: 0; transform: translateY(20px); transition: all .6s; }
  .fade-in.is-visible { opacity: 1; transform: none; }
}

/* ===== Print ===== */
@media print {
  .site-header, .site-footer, .float-cta, .menu-toggle { display: none; }
  body { background: #fff; }
}