/* ============================================================
   东莞市亨立装饰工程有限公司 · 站点级共享样式 (base.css)
   设计语言：高级简约 · 暖白轻奢编辑风
   规则 SITE-001：全站禁止内联样式 / <style>，样式一律放此文件与 page-*.css
   黄铜色仅作点缀（描边、小图标、数字、悬停态），禁止大面积使用。
   ============================================================ */

:root {
  /* 色彩令牌 */
  --bg: #F7F5F1;
  --surface: #FFFFFF;
  --warm: #EDEAE3;
  --ink: #1C1B18;
  --ink-soft: #3A372F;
  --muted: #6E6A62;
  --line: #E2DDD3;
  --line-strong: #D3CCBE;
  --brass: #A5844C;
  --brass-light: #C9AE7C;
  --brass-deep: #8A6F3E;

  /* 尺寸与圆角 */
  --radius: 16px;
  --radius-sm: 10px;
  --max-width: 1160px;
  --header-h: 72px;

  /* 字体 */
  --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Cormorant Garamond", "Noto Serif SC", serif;

  --shadow-soft: 0 18px 44px rgba(28, 27, 24, 0.07);
  --shadow-card: 0 10px 30px rgba(28, 27, 24, 0.06);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0.005em;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .25s ease, opacity .25s ease; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1rem; }

::selection { background: var(--brass); color: #fff; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.18;
  color: var(--ink);
  margin: 0 0 1rem;
  letter-spacing: -0.01em;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.4rem; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 245, 241, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.4rem;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.site-brand { display: inline-flex; align-items: center; gap: .65rem; }
.brand-logo { height: 40px; width: auto; }
.brand-text { font-family: var(--serif); font-weight: 600; font-size: 1.12rem; letter-spacing: .02em; color: var(--ink); }
.brand-text small { display: block; font-family: var(--display); font-size: .7rem; letter-spacing: .3em; color: var(--brass); font-weight: 500; }

.nav-toggle { display: none; }
.site-nav { display: flex; align-items: center; gap: .4rem; }
.site-nav a {
  color: var(--ink-soft);
  font-size: .94rem;
  padding: .5rem .78rem;
  border-radius: var(--radius-sm);
  position: relative;
}
.site-nav a:hover { color: var(--brass-deep); }
.site-nav a[aria-current="page"] { color: var(--ink); font-weight: 600; }
.site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: .78rem; right: .78rem; bottom: .18rem;
  height: 2px; background: var(--brass);
}
.nav-burger {
  display: none;
  cursor: pointer;
  width: 38px; height: 38px;
  align-items: center; justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
}
.nav-burger span, .nav-burger span::before, .nav-burger span::after {
  display: block; width: 18px; height: 2px; background: var(--ink); position: relative;
  transition: transform .25s ease;
}
.nav-burger span::before, .nav-burger span::after { content: ""; position: absolute; left: 0; }
.nav-burger span::before { top: -6px; }
.nav-burger span::after { top: 6px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: var(--sans); font-size: .92rem; font-weight: 500;
  padding: .7rem 1.4rem; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: background .25s ease, color .25s ease, border-color .25s ease, transform .2s ease;
}
.btn-primary { background: var(--brass); color: #fff; }
.btn-primary:hover { background: var(--brass-deep); color: #fff; transform: translateY(-1px); }
.btn-outline { border-color: var(--line-strong); color: var(--ink); background: transparent; }
.btn-outline:hover { border-color: var(--brass); color: var(--brass-deep); }
.btn-light { background: var(--surface); color: var(--ink); border-color: var(--line); }
.btn-light:hover { border-color: var(--brass); color: var(--brass-deep); }
.btn-nav { padding: .5rem 1.2rem; font-size: .88rem; margin-left: .5rem; }

/* ---------- 页面首屏 Hero ---------- */
.hero {
  position: relative;
  color: var(--ink);
  overflow: hidden;
}
.hero-media { position: absolute; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(247,245,241,.96) 0%, rgba(247,245,241,.82) 42%, rgba(247,245,241,.25) 100%);
}
.hero-inner {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto; padding: 6.5rem 1.4rem 5.5rem;
}
.hero-eyebrow {
  font-family: var(--sans); font-size: .82rem; letter-spacing: .28em;
  text-transform: uppercase; color: var(--brass-deep); font-weight: 500;
  display: inline-flex; align-items: center; gap: .7rem; margin-bottom: 1.4rem;
}
.hero-eyebrow::before { content: ""; width: 34px; height: 1px; background: var(--brass); }
.hero-inner h1 { font-size: clamp(2.2rem, 4.6vw, 3.7rem); font-weight: 700; line-height: 1.16; letter-spacing: .01em; }
.hero-sub { max-width: 34ch; color: var(--ink-soft); font-size: 1.04rem; line-height: 1.75; margin-bottom: 2.2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }

/* 页面内页头 */
.page-hero {
  padding: 3.6rem 0 2.6rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #FBFAF8 0%, var(--bg) 100%);
}
.page-hero-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 1.4rem; }
.page-hero h1 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); margin-bottom: .6rem; }
.page-hero .lead { max-width: 62ch; color: var(--muted); font-size: 1.02rem; }

/* 面包屑 */
.breadcrumb { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; font-size: .82rem; color: var(--muted); margin-bottom: 1.1rem; }
.breadcrumb a:hover { color: var(--brass-deep); }
.breadcrumb .sep { color: var(--brass-light); }

/* ---------- 区块脚手架 ---------- */
.section { padding: 4.2rem 0; }
.section-alt { background: var(--warm); }
.section-white { background: var(--surface); }
.section-head { max-width: 680px; margin-bottom: 2.6rem; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-eyebrow {
  font-family: var(--sans); font-size: .8rem; letter-spacing: .24em; text-transform: uppercase;
  color: var(--brass); font-weight: 600; display: inline-flex; align-items: center; gap: .6rem; margin-bottom: .9rem;
}
.section-eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--brass); }
.section-head.center .section-eyebrow::before { display: none; }
.section-title { font-size: clamp(1.6rem, 2.8vw, 2.15rem); }
.section-desc { color: var(--muted); margin-top: .8rem; }
.section-desc a { color: var(--brass-deep); text-decoration: underline; text-underline-offset: 3px; }
.section-desc a:hover { color: var(--brass); }

/* ---------- 栅格与卡片 ---------- */
.grid { display: grid; gap: 1.4rem; }
.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(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); border-color: var(--line-strong); }
.card-media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--warm); }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.card:hover .card-media img { transform: scale(1.05); }
.card-body { padding: 1.4rem 1.5rem 1.6rem; }
.card-tag {
  display: inline-block; font-size: .72rem; letter-spacing: .12em; color: var(--brass-deep);
  border: 1px solid var(--brass-light); border-radius: 999px; padding: .2rem .7rem; margin-bottom: .7rem;
}
.card-title { font-size: 1.18rem; margin-bottom: .5rem; }
.card-desc { color: var(--muted); font-size: .92rem; }
.card-meta { color: var(--muted); font-size: .8rem; margin-top: .8rem; display: flex; flex-wrap: wrap; gap: .6rem; }
.card-meta span { display: inline-flex; align-items: center; gap: .35rem; }
.card-link { color: var(--brass-deep); font-size: .88rem; font-weight: 500; display: inline-flex; align-items: center; gap: .4rem; margin-top: 1rem; }
.card-link svg { width: 15px; height: 15px; }

/* ---------- 统计数字 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.stat { padding: 1.2rem 1.2rem; border-left: 2px solid var(--brass); }
.stat-num { font-family: var(--display); font-size: 2.4rem; line-height: 1; color: var(--ink); font-weight: 600; }
.stat-num em { font-style: normal; color: var(--brass); }
.stat-label { color: var(--muted); font-size: .88rem; margin-top: .5rem; }

/* ---------- 特性 / 优势列表 ---------- */
.feature-list { display: grid; gap: 1.1rem; }
.feature-item { display: flex; gap: 1rem; padding: 1.2rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.feature-item:hover { border-color: var(--brass-light); }
.feature-icon {
  flex: 0 0 auto; width: 46px; height: 46px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(165,132,76,.1); color: var(--brass-deep);
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-item h3 { font-size: 1.05rem; margin-bottom: .3rem; }
.feature-item p { color: var(--muted); font-size: .9rem; margin: 0; }

/* ---------- 经营信息 / 联系方式 ---------- */
.info-row { display: flex; gap: .8rem; align-items: flex-start; padding: .9rem 0; border-bottom: 1px solid var(--line); }
.info-row:last-child { border-bottom: none; }
.info-icon { flex: 0 0 auto; color: var(--brass); margin-top: .15rem; }
.info-icon svg { width: 20px; height: 20px; }
.info-row .k { width: 72px; color: var(--muted); font-size: .9rem; flex: 0 0 auto; }
.info-row .v { color: var(--ink); font-size: .95rem; }
.info-row .v a:hover { color: var(--brass-deep); }

/* ---------- 资质 / 证书 ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.cert { text-align: center; }
.cert img { width: 100%; border-radius: var(--radius); border: 1px solid var(--line); background: var(--surface); padding: .4rem; }
.cert figcaption { margin-top: .8rem; color: var(--muted); font-size: .88rem; }

/* ---------- 价格 / 配套表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: .92rem; min-width: 520px; }
th, td { text-align: left; padding: 1rem 1.2rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-family: var(--serif); font-weight: 600; color: var(--ink); background: var(--warm); }
td { color: var(--ink-soft); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--warm); }

/* ---------- 常见问题 手风琴 ---------- */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); background: var(--surface); }
.faq-q {
  width: 100%; background: none; border: none; text-align: left; cursor: pointer;
  font-family: var(--serif); font-size: 1.06rem; font-weight: 600; color: var(--ink);
  padding: 1.3rem 1.4rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.faq-q .faq-toggle { flex: 0 0 auto; color: var(--brass); font-family: var(--display); font-size: 1.4rem; font-weight: 500; transition: transform .3s ease; }
.faq-item.is-open .faq-toggle { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a-inner { padding: 0 1.4rem 1.4rem; color: var(--muted); }
.faq-item.is-open .faq-a { max-height: 40rem; }

/* ---------- 列表条目 ---------- */
.list-item { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; padding: .9rem 0; border-bottom: 1px solid var(--line); }
.list-item .t { font-weight: 500; color: var(--ink); }
.list-item .t:hover { color: var(--brass-deep); }
.list-item .d { color: var(--muted); font-size: .82rem; flex: 0 0 auto; }

/* ---------- 询盘表单 ---------- */
.lead-form { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow-soft); }
.lead-form h3 { margin-bottom: 1.4rem; }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.field { display: flex; flex-direction: column; gap: .4rem; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: .85rem; color: var(--ink-soft); }
.field label .req { color: var(--brass-deep); }
.field input, .field select, .field textarea {
  font-family: var(--sans); font-size: .95rem; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: .72rem .85rem; outline: none; transition: border-color .2s ease, background .2s ease;
  width: 100%;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--brass); background: var(--surface); }
.form-note { font-size: .82rem; color: var(--muted); margin-top: 1rem; }
.form-msg { margin-top: 1rem; font-size: .92rem; padding: .8rem 1rem; border-radius: var(--radius-sm); display: none; }
.form-msg.ok { display: block; background: rgba(76,140,90,.12); color: #2f6b3a; border: 1px solid rgba(76,140,90,.3); }
.form-msg.err { display: block; background: rgba(180,70,60,.1); color: #9a3a2f; border: 1px solid rgba(180,70,60,.28); }

/* ---------- 文章 / 详情页 ---------- */
.article { max-width: 760px; margin: 0 auto; }
.article-meta { display: flex; flex-wrap: wrap; gap: 1rem; color: var(--muted); font-size: .85rem; margin-bottom: 1.6rem; padding-bottom: 1.4rem; border-bottom: 1px solid var(--line); }
.article-body { font-size: 1.02rem; color: var(--ink-soft); }
.article-body h2 { font-size: 1.4rem; margin-top: 2.2rem; }
.article-body h3 { font-size: 1.2rem; margin-top: 1.8rem; }
.article-body ul { list-style: none; margin: 0 0 1rem; }
.article-body ul li { padding-left: 1.3rem; position: relative; margin-bottom: .5rem; }
.article-body ul li::before { content: ""; position: absolute; left: 0; top: .68em; width: 7px; height: 7px; border-radius: 50%; background: var(--brass); }
.article-body table { width: 100%; border-collapse: collapse; font-size: .92rem; margin: 1.2rem 0; }
.article-body th, .article-body td { text-align: left; padding: .75rem .9rem; border: 1px solid var(--line); }
.article-body blockquote { border-left: 3px solid var(--brass-light); margin: 1.4rem 0; padding: .2rem 0 .2rem 1.2rem; color: var(--muted); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--warm); border-top: 1px solid var(--line); margin-top: 4rem; }
.footer-main { max-width: var(--max-width); margin: 0 auto; padding: 3rem 1.4rem 2rem; display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2.4rem; }
.footer-brand .brand-logo { height: 42px; margin-bottom: 1rem; }
.footer-brand p { color: var(--muted); font-size: .92rem; max-width: 34ch; }
.footer-head { font-family: var(--serif); font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }
.footer-links a { display: block; color: var(--ink-soft); font-size: .9rem; padding: .3rem 0; }
.footer-links a:hover { color: var(--brass-deep); }

.footer-ai-line {
  max-width: var(--max-width); margin: 0 auto; padding: 1rem 1.4rem;
  border-top: 1px solid var(--line); text-align: center;
  color: var(--muted); font-size: .82rem; letter-spacing: .02em;
}
.footer-ai-line a { color: var(--brass-deep); font-weight: 500; }
.footer-ai-line a:hover { text-decoration: underline; }
.footer-info {
  max-width: var(--max-width); margin: 0 auto; padding: 1.2rem 1.4rem;
  border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: .6rem 2.2rem; justify-content: center;
  color: var(--ink-soft); font-size: .86rem;
}
.footer-info .fi { display: inline-flex; align-items: center; gap: .5rem; }
.footer-info .fi svg { width: 16px; height: 16px; color: var(--brass); }
.footer-info a:hover { color: var(--brass-deep); }
.footer-copy { max-width: var(--max-width); margin: 0 auto; padding: 1.2rem 1.4rem 1.6rem; text-align: center; color: var(--muted); font-size: .82rem; border-top: 1px solid var(--line); }

/* ---------- CTA 横幅 ---------- */
.cta-band { background: var(--ink); color: #F7F5F1; padding: 3.4rem 0; }
.cta-band h2 { color: #F7F5F1; }
.cta-band p { color: #CFC9BE; }
.cta-band .section-eyebrow { color: var(--brass-light); }
.cta-band .btn-primary { background: var(--brass-light); color: var(--ink); }
.cta-band .btn-primary:hover { background: var(--brass); color: #fff; }

/* ---------- 通用工具类（替代内联样式，遵守 SITE-001） ---------- */
.mt-2 { margin-top: 2rem; }
.mt-4 { margin-top: 2.4rem; }
.w-100 { width: 100%; }
.align-center { align-items: center; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-ink { color: var(--ink); }

/* ---------- 通用提示说明 ---------- */
.case-note { color: var(--muted); font-size: .88rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.2rem; margin-top: 2rem; line-height: 1.7; }

/* ---------- 交互动效（site.js 渐进增强） ---------- */
/* 仅当 JS 运行（body.html 带 .js）时才隐藏待 reveal 元素，避免无 JS 时空白 */
.js [data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.js [data-reveal].is-inview { opacity: 1; transform: none; }
.js [data-reveal-group] > * { opacity: 0; transform: translateY(22px); transition: opacity .55s ease, transform .55s ease; }
.js [data-reveal-group].is-inview > * { opacity: 1; transform: none; }
.js [data-reveal-group].is-inview > *:nth-child(1) { transition-delay: .05s; }
.js [data-reveal-group].is-inview > *:nth-child(2) { transition-delay: .14s; }
.js [data-reveal-group].is-inview > *:nth-child(3) { transition-delay: .23s; }
.js [data-reveal-group].is-inview > *:nth-child(4) { transition-delay: .32s; }
.js [data-reveal-group].is-inview > *:nth-child(5) { transition-delay: .41s; }
.js [data-reveal-group].is-inview > *:nth-child(6) { transition-delay: .5s; }

/* 回到顶部（固定左下角：右下角为 AI 助手区域，避免重叠） */
#back-top {
  position: fixed; left: 1.4rem; right: auto; bottom: 1.6rem; z-index: 60;
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line-strong); background: var(--surface); color: var(--brass-deep);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-card); opacity: 0; visibility: hidden;
  transform: translateY(12px); transition: opacity .3s ease, transform .3s ease, visibility .3s ease;
}
#back-top svg { width: 20px; height: 20px; }
#back-top.is-show { opacity: 1; visibility: visible; transform: translateY(0); }
#back-top:hover { background: var(--brass); color: #fff; }

/* 锚点滚动监听高亮 */
[data-scrollspy] a.is-active { color: var(--brass-deep); font-weight: 600; }

/* 内容筛选选项卡 */
.filter-tabs { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.2rem; }
.filter-tab {
  font-family: var(--sans); font-size: .9rem; color: var(--ink-soft);
  background: var(--surface); border: 1px solid var(--line); border-radius: 999px;
  padding: .55rem 1.15rem; cursor: pointer; transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.filter-tab:hover { border-color: var(--brass-light); color: var(--brass-deep); }
.filter-tab.is-active { background: var(--brass); color: #fff; border-color: var(--brass); }
[data-cat].is-hidden { display: none; }

/* 通用选项卡（service 能力切换） */
.tabs { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.tabs-nav { display: flex; flex-wrap: wrap; gap: .2rem; padding: .5rem; background: var(--warm); border-bottom: 1px solid var(--line); }
.tab-btn {
  font-family: var(--sans); font-size: .9rem; color: var(--ink-soft);
  background: transparent; border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: .55rem 1rem; cursor: pointer; transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.tab-btn:hover { color: var(--brass-deep); }
.tab-btn.is-active { background: var(--surface); color: var(--ink); font-weight: 600; border-color: var(--line); }
.tab-panel { display: none; padding: 1.6rem 1.5rem; }
.tab-panel.is-active { display: block; animation: tabIn .3s ease; }
@keyframes tabIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .nav-burger { display: inline-flex; }
  .site-nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: .6rem 1rem 1rem; display: none;
  }
  .site-nav a { padding: .85rem .6rem; }
  .site-nav a[aria-current="page"]::after { display: none; }
  .nav-toggle:checked ~ .site-nav { display: flex; }
  .btn-nav { margin-left: 0; margin-top: .4rem; }
  .hero-inner { padding: 4.2rem 1.4rem 3.6rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 1.8rem; }
  .section { padding: 3.2rem 0; }
}