/* ==========================================================
   北京正大中心 · 招商官网  v3 简约商务风
   白底 · 深蓝灰文字 · 商务蓝点缀 · 无衬线 · 轻卡片
   ========================================================== */

:root {
  --bg: #ffffff;
  --bg-2: #f5f7fa;
  --bg-3: #eef2f7;
  --ink: #1a2233;
  --ink-2: #2c3648;
  --text: #2c3648;
  --text-2: #5b6678;
  --text-3: #8a93a3;
  --blue: #1558a8;
  --blue-2: #2a6fc4;
  --blue-soft: rgba(21, 88, 168, 0.06);
  --line: #e4e8ef;
  --line-2: #eef2f7;
  --white: #ffffff;
  --shadow: 0 4px 20px rgba(26, 34, 51, 0.06);
  --shadow-hover: 0 12px 36px rgba(26, 34, 51, 0.1);
  --radius: 4px;
  --radius-lg: 8px;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --maxw: 1200px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; }

/* ---------- 布局 ---------- */
.container {
  width: min(var(--maxw), calc(100% - 48px));
  margin: 0 auto;
}
.section { padding: clamp(64px, 8vw, 104px) 0; }
.section--alt { background: var(--bg-2); }
.section--ink { background: var(--ink); color: rgba(255,255,255,0.85); }
.section--ink h2 { color: #fff; }
.section--ink .lead { color: rgba(255,255,255,0.65); }

.skip-link {
  position: absolute; left: 16px; top: -48px; z-index: 200;
  padding: 10px 18px; background: var(--ink); color: #fff;
}
.skip-link:focus { top: 16px; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

/* ---------- 排版 ---------- */
h1, h2, h3 { font-weight: 600; color: var(--ink); }
.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--blue);
  font-weight: 500;
}
.section-title {
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin: 14px 0 18px;
}
.lead {
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text-2);
  max-width: 56ch;
}
.center-head { text-align: center; }
.center-head .lead { margin: 0 auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 30px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 14px;
  letter-spacing: 0.06em;
  font-weight: 500;
  transition: all 0.3s var(--ease);
}
.btn--blue { background: var(--blue); color: #fff; }
.btn--blue:hover { background: var(--blue-2); transform: translateY(-1px); box-shadow: 0 6px 18px rgba(21,88,168,0.25); }
.btn--line { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn--line:hover { background: var(--ink); color: #fff; }
.btn--line-w { border-color: rgba(255,255,255,0.5); color: #fff; background: transparent; }
.btn--line-w:hover { border-color: #fff; background: rgba(255,255,255,0.12); }
.btn--white { background: #fff; color: var(--ink); }
.btn--white:hover { background: var(--bg-2); }

/* ---------- 头部 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s var(--ease);
}
.site-header.is-solid {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 2px 16px rgba(26, 34, 51, 0.06);
}
.head-in {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; flex-direction: column; line-height: 1.2; }
.brand strong {
  font-size: 19px; letter-spacing: 0.22em; color: var(--ink);
  font-weight: 700;
}
.brand span {
  font-size: 9px; letter-spacing: 0.3em; color: var(--text-3);
  margin-top: 3px; text-transform: uppercase;
}
.main-nav ul { display: flex; gap: 36px; }
.main-nav a {
  font-size: 14.5px; color: var(--text);
  letter-spacing: 0.04em; padding: 6px 0;
  position: relative; transition: color 0.25s var(--ease);
}
.main-nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: var(--blue);
  transition: width 0.3s var(--ease);
}
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--blue); }
.main-nav a:hover::after, .main-nav a[aria-current="page"]::after { width: 100%; }
.head-cta { display: flex; align-items: center; gap: 18px; }
.head-phone {
  display: flex; flex-direction: column; line-height: 1.2;
  text-align: right;
}
.head-phone .p-label {
  font-size: 11px; letter-spacing: 0.16em; color: var(--text-3);
  text-transform: uppercase;
}
.head-phone .p-num {
  font-size: 18px; font-weight: 700; color: var(--blue);
  letter-spacing: 0.02em; margin-top: 2px;
}
.nav-toggle {
  display: none; width: 40px; height: 40px; background: none;
  border: 1px solid var(--line); border-radius: var(--radius);
  position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 50%; top: 50%;
  width: 18px; height: 1.5px; background: var(--ink);
  transform: translate(-50%, -50%); transition: all 0.3s var(--ease);
}
.nav-toggle span::before { transform: translate(-50%, calc(-50% - 5px)); }
.nav-toggle span::after  { transform: translate(-50%, calc(-50% + 5px)); }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translate(-50%, -50%) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after  { transform: translate(-50%, -50%) rotate(-45deg); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 96px 0 0;
  font-size: 13px; color: var(--text-3);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.breadcrumb li + li::before { content: "/"; margin-right: 6px; color: var(--text-3); }
.breadcrumb a { color: var(--text-2); }
.breadcrumb a:hover { color: var(--blue); }

/* ---------- 子页 Hero ---------- */
.page-hero {
  background: var(--bg-2);
  padding: 24px 0 clamp(56px, 7vw, 88px);
  border-bottom: 1px solid var(--line);
}
.page-hero h1 {
  font-size: clamp(30px, 4.4vw, 46px);
  letter-spacing: 0.02em;
  margin-top: 18px;
  color: var(--ink);
}
.page-hero .lead { margin-top: 14px; }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  background: var(--ink);
  color: #fff;
  overflow: hidden;
}
.hero-media {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.55;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(26,34,51,0.92) 0%, rgba(26,34,51,0.7) 45%, rgba(26,34,51,0.3) 100%);
}
.hero-inner { position: relative; z-index: 2; padding: 60px 0; }
.hero .eyebrow { color: rgba(255,255,255,0.75); }
.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: 0.02em;
  margin: 22px 0 20px;
  color: #fff;
  max-width: 18ch;
}
.hero .lead {
  color: rgba(255,255,255,0.8);
  max-width: 46ch;
  font-size: 16px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }

/* ---------- 数据带 ---------- */
.stats {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: 40px 24px;
  text-align: center;
  border-right: 1px solid var(--line-2);
}
.stat:last-child { border-right: none; }
.stat-num {
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
  color: var(--blue);
  line-height: 1.1;
}
.stat-num sup { font-size: 0.4em; margin-left: 2px; }
.stat-label {
  margin-top: 8px;
  font-size: 13.5px;
  color: var(--text-2);
}

/* ---------- 双栏内容 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}
.split-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.figure-cap {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-3);
}
.info-list { margin-top: 26px; }
.info-list li {
  display: flex; gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-2);
  font-size: 14.5px;
  color: var(--text);
}
.info-list li:first-child { border-top: 1px solid var(--line-2); }
.info-list .dot {
  flex-shrink: 0;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue);
  margin-top: 11px;
}

/* ---------- 三列卡片（品质） ---------- */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.q-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.35s var(--ease);
}
.q-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--blue);
}
.q-ic {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius);
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 18px;
}
.q-card h3 {
  font-size: 17.5px;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}
.q-card p { font-size: 13.5px; color: var(--text-2); line-height: 1.8; }

/* ---------- 面积 chips ---------- */
.chips {
  display: flex; flex-wrap: wrap; gap: 12px;
  margin: 28px 0 32px;
}
.chip {
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--text-2);
  background: #fff;
  transition: all 0.25s var(--ease);
}
.chip:hover { border-color: var(--blue); color: var(--blue); }
.chip strong { color: var(--ink); font-weight: 600; }

/* ---------- 房源展示卡片 ---------- */
.units-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.unit-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.35s var(--ease);
  display: flex; flex-direction: column;
}
.unit-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--blue);
}
.unit-card figure {
  position: relative; overflow: hidden;
  aspect-ratio: 16/10;
}
.unit-card figure img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.unit-card:hover figure img { transform: scale(1.05); }
.unit-tag {
  position: absolute; top: 14px; left: 14px;
  padding: 5px 12px;
  background: var(--blue);
  color: #fff;
  font-size: 12px;
  letter-spacing: 0.06em;
  border-radius: 3px;
  font-weight: 500;
}
.unit-body { padding: 22px 22px 26px; flex: 1; display: flex; flex-direction: column; }
.unit-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}
.unit-meta {
  display: flex; flex-direction: column; gap: 8px;
  margin-bottom: 18px;
}
.unit-meta li {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13.5px;
  color: var(--text-2);
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line-2);
}
.unit-meta li:last-child { border-bottom: none; padding-bottom: 0; }
.unit-meta li span:first-child { color: var(--text-3); }
.unit-meta li span:last-child { color: var(--ink); font-weight: 500; }
.unit-foot {
  margin-top: auto;
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--line-2);
}
.unit-price {
  font-size: 13px; color: var(--text-3);
}
.unit-price strong { font-size: 18px; color: var(--blue); font-weight: 700; }
.unit-btn {
  font-size: 13px; color: var(--blue); font-weight: 500;
  display: inline-flex; align-items: center; gap: 6px;
  transition: gap 0.25s var(--ease);
}
.unit-btn:hover { gap: 10px; }

/* ---------- 表格 ---------- */
.tbl {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: 14.5px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
}
.tbl caption {
  caption-side: top; text-align: left;
  padding-bottom: 14px;
  font-size: 12px; letter-spacing: 0.16em;
  color: var(--text-3); text-transform: uppercase;
}
.tbl th, .tbl td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line-2);
}
.tbl thead th {
  font-size: 12.5px; letter-spacing: 0.1em;
  color: var(--text-2); font-weight: 600;
  background: var(--bg-2); text-transform: uppercase;
}
.tbl tbody tr:last-child td { border-bottom: none; }
.tbl tbody tr:hover { background: var(--blue-soft); }
.tbl .zone { font-weight: 600; color: var(--ink); }

/* ---------- 流程步骤 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  position: relative;
}
.step .s-no {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 14px;
}
.step h3 {
  font-size: 16.5px;
  margin-bottom: 6px;
}
.step p { font-size: 13px; color: var(--text-2); }

/* ---------- 新闻卡 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.35s var(--ease);
  display: flex; flex-direction: column;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.news-card figure { overflow: hidden; aspect-ratio: 16/10; }
.news-card img {
  aspect-ratio: 16/10;
  object-fit: cover;
  width: 100%;
  height: 100%;
  transition: transform 0.5s var(--ease);
}
.news-card:hover img { transform: scale(1.04); }
.news-body { padding: 22px 22px 26px; }
.news-date {
  font-size: 12.5px;
  color: var(--blue);
  font-weight: 500;
}
.news-card h3 {
  font-size: 16.5px;
  line-height: 1.5;
  margin: 8px 0 10px;
}
.news-card p {
  font-size: 13.5px;
  color: var(--text-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- CTA ---------- */
.cta-band {
  background: var(--ink);
  color: #fff;
  padding: clamp(64px, 8vw, 96px) 0;
}
.cta-in {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
}
.cta-band h2 {
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.35;
  color: #fff;
}
.cta-band .cta-sub {
  margin-top: 14px;
  color: rgba(255,255,255,0.7);
  font-size: 15px;
}
.cta-band .btn { margin-top: 28px; }
.cta-contact { text-align: right; }
.cta-phone {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}
.cta-contact .note {
  margin-top: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.55);
}

/* ---------- 表单 ---------- */
.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4vw, 44px);
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 22px;
}
.field { display: flex; flex-direction: column; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}
.field input, .field select, .field textarea {
  font: inherit;
  font-size: 14.5px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  transition: border-color 0.2s var(--ease);
  width: 100%;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}
.form-note { font-size: 12.5px; color: var(--text-3); margin-top: 16px; }
.form-success {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: var(--radius);
  background: var(--blue-soft);
  border: 1px solid rgba(21,88,168,0.2);
  color: var(--blue);
  font-size: 14px;
}
.form-success.is-visible { display: block; }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  gap: 20px;
  padding: 20px 4px;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 22px;
  color: var(--blue);
  font-weight: 300;
  transition: transform 0.3s var(--ease);
  flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-a {
  padding: 0 4px 22px;
  color: var(--text-2);
  font-size: 14.5px;
  max-width: 72ch;
}

/* ---------- 右侧悬浮咨询 ---------- */
.consult-fab {
  position: fixed; right: 20px; top: 50%; transform: translateY(-50%);
  z-index: 90;
  display: flex; flex-direction: column; gap: 10px;
}
.fab-btn {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 20px rgba(21, 88, 168, 0.35);
  transition: all 0.3s var(--ease);
  border: none;
  position: relative;
}
.fab-btn:hover { background: var(--blue-2); transform: scale(1.06); }
.fab-btn svg { width: 24px; height: 24px; }
.fab-btn .fab-close { display: none; }
.fab-btn.is-open .fab-open { display: none; }
.fab-btn.is-open .fab-close { display: block; }

.fab-panel {
  position: absolute; right: 70px; top: 0;
  width: 240px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--line);
  padding: 20px;
  opacity: 0; visibility: hidden;
  transform: translateX(10px);
  transition: all 0.3s var(--ease);
}
.fab-panel.is-open { opacity: 1; visibility: visible; transform: none; }
.fab-panel h4 {
  font-size: 15px; color: var(--ink); font-weight: 600;
  margin-bottom: 14px; text-align: center;
}
.fab-qr {
  width: 180px; height: 180px; margin: 0 auto;
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 8px; background: #fff;
}
.fab-qr img { width: 100%; height: 100%; object-fit: contain; }
.fab-qr-cap {
  text-align: center; font-size: 12.5px; color: var(--text-3);
  margin-top: 8px;
}
.fab-divider {
  height: 1px; background: var(--line-2); margin: 16px 0;
}
.fab-phone {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 700; color: var(--blue);
  text-align: center;
}
.fab-phone svg { width: 18px; height: 18px; }

@media (max-width: 600px) {
  .consult-fab { right: 14px; }
  .fab-btn { width: 48px; height: 48px; }
  .fab-btn svg { width: 20px; height: 20px; }
  .fab-panel { right: 60px; width: 210px; padding: 16px; }
  .fab-qr { width: 150px; height: 150px; }
}

/* ---------- 页脚 ---------- */
.foot {
  background: var(--ink);
  color: rgba(255,255,255,0.6);
  padding: 60px 0 28px;
  font-size: 13.5px;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.foot-brand strong {
  display: block;
  font-size: 20px;
  letter-spacing: 0.2em;
  color: #fff;
  font-weight: 700;
}
.foot-brand span {
  display: block;
  font-size: 9.5px;
  letter-spacing: 0.28em;
  color: rgba(255,255,255,0.4);
  margin: 5px 0 16px;
  text-transform: uppercase;
}
.foot h4 {
  color: #fff;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 16px;
}
.foot li { margin-bottom: 10px; }
.foot a { transition: color 0.25s var(--ease); }
.foot a:hover { color: var(--blue-2); }
.foot-bot {
  display: flex; flex-wrap: wrap; justify-content: space-between;
  gap: 10px; padding-top: 24px;
  font-size: 12px; color: rgba(255,255,255,0.4);
}

/* ---------- 动效（失败可降级） ---------- */
@media (prefers-reduced-motion: no-preference) {
  html.js [data-reveal] {
    opacity: 0; transform: translateY(20px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  }
  html.js [data-reveal].is-in { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .main-nav {
    position: fixed; inset: 68px 0 auto 0;
    background: #fff;
    padding: 8px 0 20px;
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: all 0.3s var(--ease);
    border-bottom: 1px solid var(--line);
  }
  .main-nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .main-nav ul { flex-direction: column; gap: 0; padding: 0 24px; }
  .main-nav a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line-2); }
  .nav-toggle { display: block; }
  .head-cta .btn { display: none; }
  .head-phone { text-align: right; }
  .head-phone .p-num { font-size: 16px; }

  .units-grid { grid-template-columns: 1fr; }

  .split { grid-template-columns: 1fr; }
  .quality-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat { border-right: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2); }
  .stat:nth-child(2) { border-right: none; }
  .stat:nth-last-child(-n+2) { border-bottom: none; }
  .cta-in { grid-template-columns: 1fr; }
  .cta-contact { text-align: left; margin-top: 24px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .tbl thead { display: none; }
  .tbl tr { display: block; padding: 12px 0; border-bottom: 1px solid var(--line-2); }
  .tbl td { display: block; border: none; padding: 3px 20px; }
  .tbl td::before {
    content: attr(data-th) "：";
    font-size: 12px; color: var(--text-3); margin-right: 6px;
  }
}