/* =========================================================
   北京三星大厦 招商网站 — 共享设计系统
   风格：Structured Confidence · 简约 / 大气 / 商务
   ========================================================= */

/* ---------- Design Tokens ---------- */
:root {
  /* Surfaces */
  --paper: oklch(97.2% 0.006 82);      /* 暖白背景 */
  --white: oklch(99.5% 0.003 80);      /* 卡片白 */
  --ink-deep: oklch(21% 0.02 60);      /* 深色区块 */
  --ink: oklch(20% 0.015 60);          /* 主文字（暖墨色） */
  --muted: oklch(47% 0.012 62);        /* 次要文字 */
  --faint: oklch(65% 0.01 62);         /* 辅助文字 */
  --line: oklch(88% 0.012 62);         /* 分割线 */
  --line-strong: oklch(78% 0.012 62);

  /* Accent — 香槟金/古铜，克制且商务 */
  --accent: oklch(54% 0.115 68);
  --accent-deep: oklch(41% 0.10 64);
  --accent-soft: oklch(93% 0.03 78);

  /* Type */
  --font-display: "Noto Serif SC", "Songti SC", "SimSun", "Source Han Serif SC", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Rhythm — body 16px * 1.7 = 27.2 ≈ 28 */
  --space: 1.75rem;    /* 28px base unit */
  --container: 1200px;
  --radius: 2px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.7s;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  font-kerning: normal;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
::selection { background: var(--accent); color: var(--white); }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}
.section { padding-block: clamp(2.75rem, 6vw, 4.5rem); }
.section--tight { padding-block: clamp(2rem, 4vw, 3.25rem); }

/* ---------- Typography ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}
.eyebrow::before {
  content: "";
  width: 2rem;
  height: 1px;
  background: var(--accent);
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--ink);
}
.h-display { font-size: clamp(1.9rem, 4.6vw, 3.3rem); line-height: 1.15; letter-spacing: 0.02em; }
.h-xl      { font-size: clamp(1.55rem, 3vw, 2.35rem); line-height: 1.22; }
.h-lg      { font-size: clamp(1.25rem, 2vw, 1.6rem); line-height: 1.32; }
.h-md      { font-size: clamp(1.1rem, 1.5vw, 1.3rem); line-height: 1.4; }
.lead { font-size: clamp(0.98rem, 1.1vw, 1.06rem); line-height: 1.85; color: var(--muted); max-width: 62ch; }
.text-muted { color: var(--muted); }
.text-faint { color: var(--faint); }

.section-head { display: grid; gap: 0.85rem; margin-bottom: clamp(1.75rem, 3.5vw, 2.75rem); max-width: 760px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.9rem 1.8rem;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
  will-change: transform;
  min-height: 48px;
}
.btn--primary { background: var(--accent); color: var(--white); }
.btn--primary:hover { background: var(--accent-deep); transform: translateY(-2px); }
.btn--ghost { border: 1px solid var(--line-strong); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--ink); background: var(--ink); color: var(--white); transform: translateY(-2px); }
.btn--dark { border: 1px solid oklch(100% 0 0 / 0.35); color: var(--white); }
.btn--dark:hover { background: var(--white); color: var(--ink); border-color: var(--white); transform: translateY(-2px); }
.btn .arrow { transition: transform var(--dur) var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand-mark {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border: 1px solid currentColor;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  border-radius: var(--radius);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text .cn { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; letter-spacing: 0.08em; }
.brand-text .en { font-size: 0.62rem; letter-spacing: 0.22em; color: var(--muted); text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: clamp(1.2rem, 2.2vw, 2.4rem); }
.nav a {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.4rem 0;
  color: var(--ink);
  transition: color var(--dur) var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--dur) var(--ease);
}
.nav a:hover, .nav a.is-active { color: var(--accent); }
.nav a:hover::after, .nav a.is-active::after { width: 100%; }

/* Header phone (right top) */
.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
}
.header-phone svg { width: 18px; height: 18px; color: var(--accent); flex-shrink: 0; }
.header-phone b { font-family: var(--font-display); font-weight: 700; white-space: nowrap; }

/* Header states: transparent over hero, solid on scroll / inner pages */
.site-header { color: var(--ink); }
.site-header.is-transparent { color: var(--white); }
.site-header.is-transparent .brand-text .en { color: oklch(100% 0 0 / 0.7); }
.site-header.is-transparent .nav a { color: var(--white); }
.site-header.is-transparent .nav a:hover { color: var(--accent); }
.site-header.is-transparent .header-phone { color: var(--white); }
.site-header.is-transparent .header-phone svg { color: var(--accent); }
.site-header.is-solid {
  background: oklch(99% 0.005 80 / 0.92);
  backdrop-filter: saturate(160%) blur(10px);
  box-shadow: 0 1px 0 var(--line);
  color: var(--ink);
}
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  position: relative;
}
.nav-toggle span {
  position: absolute; left: 12px; right: 12px;
  height: 1.5px; background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 22px; }
.nav-toggle span:nth-child(3) { top: 28px; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 84svh;
  display: flex;
  align-items: center;
  color: var(--white);
  overflow: hidden;
}
.hero__media {
  position: absolute; inset: 0;
  z-index: 0;
}
.hero__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scale(1.05);
  animation: heroZoom 18s var(--ease) forwards;
}
@keyframes heroZoom { to { transform: scale(1.16); } }
.hero__media::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, oklch(15% 0.02 60 / 0.78) 0%, oklch(15% 0.02 60 / 0.42) 55%, oklch(15% 0.02 60 / 0.15) 100%),
    linear-gradient(0deg, oklch(15% 0.02 60 / 0.65) 0%, transparent 45%);
}
.hero__content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding-block: 6rem 3rem;
}
.hero h1 {
  color: var(--white);
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: 0.03em;
  margin-bottom: 1.1rem;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.hero .lead { color: oklch(100% 0 0 / 0.82); max-width: 52ch; margin-bottom: 1.6rem; }
.hero__meta {
  position: absolute;
  bottom: 1.6rem; left: 0; right: 0;
  z-index: 2;
}
.hero__meta .container {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem 2.6rem;
  padding-top: 1.1rem;
  border-top: 1px solid oklch(100% 0 0 / 0.2);
}
.hero__meta dt { font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase; color: oklch(100% 0 0 / 0.6); margin-bottom: 0.25rem; }
.hero__meta dd { font-family: var(--font-display); font-size: 1rem; color: var(--white); }

/* Page hero (inner pages) */
.page-hero {
  position: relative;
  min-height: 46vh;
  display: flex;
  align-items: flex-end;
  color: var(--white);
  padding-bottom: clamp(2rem, 4vw, 3rem);
  overflow: hidden;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { color: var(--white); }
.page-hero .lead { color: oklch(100% 0 0 / 0.8); }

/* ---------- Metrics band ---------- */
.metrics { display: grid; gap: 1px; background: var(--line); }
.metrics { grid-template-columns: repeat(4, 1fr); }
.metric {
  background: var(--white);
  padding: clamp(1.5rem, 3vw, 2.25rem) clamp(1rem, 1.6vw, 1.6rem);
  text-align: center;
}
.metric .num {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 600;
  color: var(--ink);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.metric .num .unit { font-size: 0.4em; color: var(--accent); margin-left: 0.2em; font-weight: 500; }
.metric .label { margin-top: 0.6rem; font-size: 0.8rem; color: var(--muted); letter-spacing: 0.06em; }

/* ---------- Feature / card grids ---------- */
.grid { display: grid; gap: clamp(1.5rem, 3vw, 2.5rem); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.feature-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: clamp(1.25rem, 2vw, 1.8rem);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.feature-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 24px 40px -28px oklch(20% 0.02 60 / 0.35); }
.feature-card__index { font-family: var(--font-display); font-size: 0.78rem; color: var(--accent); letter-spacing: 0.15em; margin-bottom: 0.9rem; }
.feature-card h3 { margin-bottom: 0.55rem; font-size: 1.15rem; }
.feature-card p { color: var(--muted); font-size: 0.9rem; line-height: 1.7; }
.feature-card .icon { width: 34px; height: 34px; margin-bottom: 0.9rem; color: var(--accent); }

/* ---------- Image + text split ---------- */
.split { display: grid; gap: clamp(1.75rem, 4vw, 3.5rem); align-items: center; grid-template-columns: 1fr 1fr; }
.split--rev > :first-child { order: 2; }
.split__media { position: relative; }
.split__media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; border-radius: var(--radius); filter: saturate(0.98); }
.split__media::before {
  content: "";
  position: absolute;
  inset: auto -14px -14px auto;
  width: 40%; height: 40%;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  z-index: -1;
}
.split--rev .split__media::before { inset: auto auto -14px -14px; }

/* ---------- Dark band ---------- */
.band-dark { background: var(--ink-deep); color: oklch(100% 0 0 / 0.85); }
.band-dark h2, .band-dark h3 { color: var(--white); }
.band-dark .lead { color: oklch(100% 0 0 / 0.7); }
.band-dark .eyebrow { color: var(--accent); }

/* ---------- CTA banner ---------- */
.cta-banner {
  position: relative;
  text-align: center;
  padding-block: clamp(2.75rem, 5vw, 4rem);
  background: var(--ink-deep);
  color: var(--white);
  overflow: hidden;
}
.cta-banner::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, oklch(30% 0.05 68 / 0.25), transparent 60%);
}
.cta-banner .container { position: relative; max-width: 760px; }
.cta-banner h2 { color: var(--white); margin-bottom: 0.9rem; }
.cta-banner p { color: oklch(100% 0 0 / 0.78); margin-bottom: 1.4rem; }

/* ---------- Space / floor cards ---------- */
.space-card {
  background: var(--white);
  border: 1px solid var(--line);
  overflow: hidden;
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.space-card:hover { transform: translateY(-5px); box-shadow: 0 30px 50px -30px oklch(20% 0.02 60 / 0.4); }
.space-card__media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.space-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.9s var(--ease); }
.space-card:hover .space-card__media img { transform: scale(1.06); }
.space-card__tag {
  position: absolute; top: 1rem; left: 1rem;
  background: oklch(0% 0 0 / 0.55);
  color: var(--white);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius);
  backdrop-filter: blur(4px);
}
.space-card__body { padding: 1.1rem 1.3rem 1.4rem; }
.space-card__body h3 { margin-bottom: 0.4rem; }
.space-card__specs { display: flex; flex-wrap: wrap; gap: 0.4rem 1.4rem; margin: 0.9rem 0 1.1rem; font-size: 0.82rem; color: var(--muted); }
.space-card__specs span strong { color: var(--ink); font-weight: 600; margin-right: 0.3rem; }

/* ---------- Table ---------- */
.table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.table th, .table td { text-align: left; padding: 1rem 0.75rem; border-bottom: 1px solid var(--line); }
.table th { font-weight: 600; color: var(--muted); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; }
.table td { color: var(--ink); }
.table tr:last-child td { border-bottom: none; }
.table .num { font-family: var(--font-display); font-variant-numeric: tabular-nums; }

/* ---------- Location / amenity lists ---------- */
.amenity-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.amenity-list li { background: var(--white); padding: 1.4rem 1.5rem; display: flex; gap: 1rem; align-items: flex-start; }
.amenity-list .dot { flex-shrink: 0; width: 8px; height: 8px; background: var(--accent); margin-top: 0.7rem; }
.amenity-list strong { display: block; font-size: 0.98rem; margin-bottom: 0.2rem; }
.amenity-list span { font-size: 0.85rem; color: var(--muted); }

/* Timeline / steps */
.steps { counter-reset: step; display: grid; gap: 0; }
.step { display: grid; grid-template-columns: auto 1fr; gap: 1.5rem; padding: 1.5rem 0; border-bottom: 1px solid var(--line); }
.step:last-child { border-bottom: none; }
.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--accent);
  line-height: 1;
}
.step h4 { margin-bottom: 0.35rem; font-size: 1.15rem; }
.step p { color: var(--muted); font-size: 0.92rem; }

/* ---------- Contact info ---------- */
.info-list { display: grid; gap: 1.5rem; }
.info-item { display: grid; grid-template-columns: auto 1fr; gap: 1rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--line); }
.info-item:last-child { border-bottom: none; padding-bottom: 0; }
.info-item .ic { width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--line-strong); color: var(--accent); border-radius: var(--radius); }
.info-item h4 { font-size: 0.8rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.8rem; font-family: var(--font-body); font-weight: 600; }
.info-item p { font-family: var(--font-display); font-size: 1.15rem; color: var(--ink); }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink-deep); color: oklch(100% 0 0 / 0.65); padding-block: clamp(3rem, 5vw, 4.5rem) 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 2.5rem; padding-bottom: 2.5rem; border-bottom: 1px solid oklch(100% 0 0 / 0.12); }
.site-footer .brand-text .cn { color: var(--white); }
.site-footer .brand-text .en { color: oklch(100% 0 0 / 0.55); }
.site-footer h5 { color: var(--white); font-family: var(--font-body); font-size: 0.8rem; letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: 1.1rem; font-weight: 600; }
.site-footer li { margin-bottom: 0.6rem; font-size: 0.9rem; }
.site-footer a { transition: color var(--dur) var(--ease); }
.site-footer a:hover { color: var(--accent); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding-top: 1.8rem; font-size: 0.8rem; color: oklch(100% 0 0 / 0.45); }

/* ---------- Floating consult (right side) ---------- */
.float-consult {
  position: fixed;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 60;
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 14px 32px -14px oklch(20% 0.02 60 / 0.45);
}
.fc-btn {
  width: 58px;
  padding: 0.7rem 0.35rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.7rem;
  color: var(--ink);
  background: var(--white);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
  position: relative;
}
.fc-btn svg { width: 22px; height: 22px; }
.fc-btn + .fc-btn { border-top: 1px solid var(--line); }
.fc-btn:hover { background: var(--accent); color: #fff; }
.fc-qr {
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  background: #fff;
  padding: 0.7rem;
  border-radius: var(--radius);
  box-shadow: 0 14px 32px -12px oklch(20% 0.02 60 / 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease);
  white-space: nowrap;
}
.fc-btn:hover .fc-qr, .fc-btn.is-open .fc-qr { opacity: 1; pointer-events: auto; }
.fc-qr img { width: 130px; height: 130px; object-fit: contain; display: block; }
.fc-qr p { font-size: 0.74rem; color: var(--muted); margin-top: 0.45rem; text-align: center; }

/* ---------- Photo gallery ---------- */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(0.75rem, 1.2vw, 1rem); }
.gallery figure { margin: 0; overflow: hidden; border-radius: var(--radius); border: 1px solid var(--line); background: var(--white); }
.gallery img { width: 100%; height: 200px; object-fit: cover; transition: transform 0.8s var(--ease); }
.gallery figure:hover img { transform: scale(1.06); }
.gallery figcaption { padding: 0.6rem 0.8rem; font-size: 0.8rem; color: var(--muted); border-top: 1px solid var(--line); }

/* ---------- Reveal animation (fail-open) ----------
   内容默认可见；仅当 JS 注入 .js 后才隐藏并揭示，
   确保 JS 禁用或抛错时内容照常可见。 */
.reveal { transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease); }
html.js .reveal { opacity: 0; transform: translateY(28px); }
html.js .reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none; }
  html.js .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
  .hero__media img { animation: none; transform: none; }
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-sm { margin-bottom: 1rem; }
.mb-md { margin-bottom: 2rem; }
.divider { width: 48px; height: 1px; background: var(--accent); margin: 1.5rem 0; }
.divider--center { margin-inline: auto; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .nav { display: none; }
  .nav-toggle { display: block; }
  .header-phone { display: none; }
  .site-header.nav-open { background: var(--white); color: var(--ink); }
  .site-header.nav-open .nav {
    display: flex;
    position: absolute;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
    padding: 1rem 1.5rem 2rem;
    box-shadow: 0 20px 40px -20px oklch(20% 0.02 60 / 0.3);
  }
  .site-header.nav-open .nav a { color: var(--ink); padding: 1rem 0; border-bottom: 1px solid var(--line); }
  .site-header.nav-open .nav .btn { margin-top: 1rem; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .split, .split--rev { grid-template-columns: 1fr; }
  .split--rev > :first-child { order: 0; }
  .amenity-list { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
  .gallery { grid-template-columns: 1fr; }
  .hero { flex-direction: column; align-items: stretch; min-height: auto; }
  .hero__meta { position: static; padding-top: 0; width: 100%; }
  .hero__meta .container { border-top: 1px solid oklch(100% 0 0 / 0.2); }
  .h-display { font-size: 1.9rem; }
  .float-consult { right: 8px; }
  .fc-btn { width: 48px; padding: 0.55rem 0.3rem; }
  .fc-qr img { width: 110px; height: 110px; }
}

/* ---------- 触屏：禁用 hover 残留，保证点击态干净 ---------- */
@media (hover: none) {
  .btn:hover { transform: none; }
  .btn:hover .arrow { transform: none; }
  .nav a:hover { color: inherit; }
  .fc-btn:hover { background: var(--white); color: var(--ink); }
  .fc-btn:active { background: var(--accent-soft); }
  .gallery figure:hover img { transform: none; }
}

/* ---------- 超窄屏（≤420px）进一步收紧 ---------- */
@media (max-width: 420px) {
  .container { padding-inline: 1rem; }
  .section { padding-block: 2.5rem; }
  .h-display { font-size: 1.65rem; }
  .h-xl { font-size: 1.4rem; }
  .btn { padding: 0.85rem 1.4rem; width: 100%; }
  .hero__content .btn { width: auto; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .float-consult { right: 6px; }
  .fc-btn { width: 44px; padding: 0.5rem 0.25rem; font-size: 0.62rem; }
  .fc-qr img { width: 100px; height: 100px; }
}