/* ============ 基础变量 ============ */
:root {
  --bg: #faf8f4;
  --bg-soft: #f2eee6;
  --surface: #fffdfa;
  --ink: #221f1b;
  --ink-soft: #6a645a;
  --line: #e5dfd4;
  --accent: #94764a;
  --accent-dark: #715739;
  --navy: #1b1916;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 16px 46px rgba(35, 28, 18, .07);
  --shadow-sm: 0 6px 20px rgba(35, 28, 18, .05);
  --serif: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif CJK SC", "Noto Serif SC", "SimSun", Georgia, serif;
  --sans: "PingFang SC", "Microsoft YaHei", -apple-system, system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

/* hidden 属性必须生效：防止 .measure-form 的 display:grid 等规则覆盖它 */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container { width: min(1180px, 92%); margin: 0 auto; }

a { color: inherit; text-decoration: none; }

/* ============ 按钮 ============ */
.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(176, 141, 87, .3); }
.btn-block { width: 100%; padding: 15px; font-size: 16px; }

/* ============ 顶部条 ============ */
.topbar { background: var(--navy); color: #d9d4cb; font-size: 13px; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; padding: 9px 0; }
.topbar-cities em { color: #8e8c84; font-style: normal; }
.topbar-phone { color: var(--accent); font-weight: 600; }
.topbar-phone:hover { color: #d9b887; }

/* ============ 导航 ============ */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.nav.scrolled { border-color: var(--line); box-shadow: var(--shadow-sm); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; flex-direction: column; line-height: 1.1; }
.brand-mark { font-family: var(--serif); font-size: 24px; font-weight: 700; letter-spacing: 1px; color: var(--ink); }
/* 古铜金金属字标（替代原文字 logo） */
.brand-mark-img { width: 132px; max-width: 46vw; height: auto; display: block; }
/* 品牌副标题：与上方字标等宽，字距均匀拉开、两端对齐 */
.brand-sub {
  display: block; width: 132px; max-width: 46vw;
  font-size: 13px; color: var(--ink-soft); letter-spacing: 0;
  margin-top: 4px; white-space: nowrap;
  text-align: justify; text-align-last: justify;
}
html[lang="en"] .brand-sub {
  font-size: 11px; letter-spacing: -.1px;
  text-align: left; text-align-last: left;
}

.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { font-size: 15px; color: var(--ink); position: relative; padding: 6px 0; }
.nav-links a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--accent); transition: width .25s ease;
}
.nav-links a:not(.nav-cta):hover::after { width: 100%; }
.nav-cta { padding: 9px 20px; font-size: 14px; }
.nav-links { margin-left: auto; }

/* 语言切换 */
.lang-switch { position: relative; margin-left: 6px; }
.lang-btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; color: var(--ink);
  background: var(--bg-soft); border: 1px solid var(--line);
  padding: 7px 13px; border-radius: 999px; cursor: pointer;
  white-space: nowrap; transition: .2s;
}
.lang-btn:hover { border-color: var(--accent); color: var(--accent); }
.lang-caret { font-size: 10px; opacity: .6; line-height: 1; }
.lang-menu {
  position: absolute; top: calc(100% + 8px); right: 0; min-width: 132px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  box-shadow: 0 12px 30px rgba(0,0,0,.12); padding: 6px; z-index: 80; list-style: none;
}
.lang-menu li button {
  width: 100%; text-align: left; background: none; border: 0; cursor: pointer;
  font-size: 14px; color: var(--ink); padding: 9px 12px; border-radius: 8px; transition: .15s;
}
.lang-menu li button:hover { background: var(--bg-soft); }
.lang-menu li button.is-active { color: var(--accent); font-weight: 600; }
@media (max-width: 720px) {
  .lang-btn { padding: 6px 10px; font-size: 13px; }
}

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s; }

/* ============ Hero（呼应画册封面：深灰黑 + 铜金，沉浸式全屏） ============ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: linear-gradient(160deg, #2e2d2b 0%, #1b1a18 100%);
  padding: 132px 0 104px;
  overflow: hidden;
}
.hero-bg-img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: center 32%;
  opacity: .28; pointer-events: none;
}
.hero-bg-video {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: center 32%;
  opacity: .6; pointer-events: none; z-index: 0;
}
@media (max-width: 980px) { .hero-bg-video { opacity: .4; } }
.hero-overlay {
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 80% at 18% 18%, rgba(176, 141, 87, .14), transparent 55%),
    linear-gradient(180deg, rgba(20, 19, 17, .30), rgba(20, 19, 17, .72));
  pointer-events: none;
}
.hero-inner { display: block; position: relative; z-index: 2; }
.hero-copy { max-width: 760px; }
@media (max-width: 980px) { .hero-bg-img { opacity: .16; } }
.hero-copy h1 { font-size: clamp(36px, 5vw, 62px); }
.eyebrow-line { display: inline-block; width: 34px; height: 2px; background: var(--accent); margin-right: 12px; vertical-align: middle; }
.hero-cta { display: flex; gap: 16px; margin-top: 36px; flex-wrap: wrap; }
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-ghost { background: transparent; color: #eae6df; border: 1px solid rgba(255, 255, 255, .35); }
.btn-ghost:hover { background: rgba(255, 255, 255, .08); border-color: var(--accent); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0, 0, 0, .25); }
.hero-scroll {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 44px; border: 2px solid rgba(255, 255, 255, .4);
  border-radius: 14px; z-index: 2; display: grid; place-items: start center; padding-top: 8px;
}
.hero-scroll-dot {
  width: 4px; height: 8px; background: var(--accent); border-radius: 2px;
  animation: scrollDot 1.6s ease-in-out infinite;
}
@keyframes scrollDot { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(15px); opacity: .2; } 100% { transform: translateY(0); opacity: 1; } }
@media (max-width: 720px) {
  .hero { min-height: auto; padding: 104px 0 64px; }
  .hero-scroll { display: none; }
}
.eyebrow { color: var(--accent); font-weight: 600; letter-spacing: 2px; font-size: 13px; text-transform: uppercase; margin-bottom: 14px; }
.hero-copy h1 { font-family: var(--serif); font-size: clamp(34px, 4.4vw, 56px); line-height: 1.18; font-weight: 700; letter-spacing: 1px; color: #fff; }
.hero-copy h1 .hl { color: #cfa96f; }
.hero-lead { margin: 22px 0 26px; color: #c9c4bb; font-size: 17px; max-width: 30em; }
.hero-points { list-style: none; display: flex; flex-wrap: wrap; gap: 14px 26px; }
.hero-points li { position: relative; padding-left: 22px; font-size: 15px; color: #eae6df; font-weight: 500; }
.hero-points li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--accent); font-weight: 700; }

/* 量尺表单卡片 */
.measure-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 30px 28px;
}
.measure-head h3 { font-family: var(--serif); font-size: 24px; }
.measure-head p { color: var(--ink-soft); font-size: 14px; margin-top: 4px; }
.measure-form { margin-top: 20px; display: grid; gap: 14px; }
.field { display: flex; flex-direction: column; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 14px; font-size: 15px; font-family: var(--sans);
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fcfbf9; color: var(--ink);
  transition: border-color .2s ease, box-shadow .2s ease; resize: vertical;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(176, 141, 87, .15);
}
.field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23b08d57' stroke-width='1.6' fill='none'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; }
.err { color: #c0392b; font-size: 13px; min-height: 16px; margin-top: 4px; }
.measure-tip { font-size: 12px; color: #9a9388; text-align: center; margin-top: 2px; }

.measure-success { text-align: center; padding: 30px 10px; }
.success-icon { width: 60px; height: 60px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 30px; display: grid; place-items: center; margin: 0 auto 16px; }
.measure-success h3 { font-family: var(--serif); font-size: 24px; }
.measure-success p { color: var(--ink-soft); margin-top: 8px; font-size: 15px; }

/* ============ 信任条 ============ */
.trust { background: #fff; color: var(--ink); padding: 44px 0; border-bottom: 1px solid var(--line); }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.trust-item strong { font-family: var(--serif); font-size: 40px; color: var(--accent); display: block; }
.trust-item strong span { font-size: 18px; margin-left: 2px; }
.trust-item span:last-child { color: var(--ink-soft); font-size: 14px; }

/* ============ 通用 section ============ */
.section { padding: 84px 0; }
.section-alt { background: #f8f7f4; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; position: relative; }
.section-head::before { content: ""; display: block; width: 46px; height: 3px; background: var(--accent); border-radius: 2px; margin: 0 auto 20px; }
.section-head h2 { font-family: var(--serif); font-size: clamp(28px, 3.4vw, 40px); letter-spacing: 1px; }
.section-sub { color: var(--ink-soft); margin-top: 14px; font-size: 16px; }

/* 卡片 */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; transition: transform .25s ease, box-shadow .25s ease; overflow: hidden; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }

/* 带图片的卡片 */
.card-has-img { padding: 0; display: flex; flex-direction: column; }
.card-img-wrap { width: 100%; aspect-ratio: 4 / 3; overflow: hidden; background: #eee; }
.card-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.card-has-img:hover .card-img-wrap img { transform: scale(1.05); }
.card-body { padding: 24px 24px 20px; flex: 1; display: flex; flex-direction: column; }
.card-tag { display: inline-block; font-size: 12px; color: var(--accent-dark); background: rgba(176, 141, 87, .12); padding: 4px 12px; border-radius: 999px; margin-bottom: 14px; }
.card h3 { font-family: var(--serif); font-size: 22px; margin-bottom: 10px; }
.card p { color: var(--ink-soft); font-size: 15px; }

/* 定制网格 */
.custom-layout { display: grid; gap: 40px; }
.custom-gallery { display: grid; grid-template-columns: 1.6fr 1fr; gap: 20px; }
.gallery-main, .gallery-side { border-radius: var(--radius); overflow: hidden; background: #eee; position: relative; }
.gallery-main img, .gallery-side img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s ease; }
.gallery-main:hover img, .gallery-side:hover img { transform: scale(1.03); }
.gallery-main { aspect-ratio: 4 / 3; }
.gallery-side { aspect-ratio: 4 / 3; }
figcaption {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 10px 16px; font-size: 13px; color: #fff;
  background: linear-gradient(transparent, rgba(0,0,0,.55));
}
.custom-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.custom-item { display: flex; gap: 16px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.custom-item .dot { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); margin-top: 8px; flex: none; }
.custom-item h4 { font-size: 18px; margin-bottom: 4px; }
.custom-item p { color: var(--ink-soft); font-size: 15px; }

/* 关于我们 */
.about-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 56px; align-items: center; }
.about-copy h2 { font-family: var(--serif); font-size: clamp(26px, 3vw, 38px); margin-bottom: 18px; }
.about-copy p { color: var(--ink-soft); margin-bottom: 14px; font-size: 16px; }
.about-list { list-style: none; display: grid; gap: 10px; margin-top: 18px; }
.about-list li { position: relative; padding-left: 24px; font-weight: 500; }
.about-list li::before { content: "◆"; position: absolute; left: 0; color: var(--accent); font-size: 12px; top: 4px; }

.about-visual { display: grid; gap: 20px; }
.about-gallery {
  border-radius: var(--radius); overflow: hidden;
  background: #eee; position: relative; aspect-ratio: 3 / 2.8;
}
.about-gallery img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s ease; }
.about-gallery:hover img { transform: scale(1.03); }
.about-stats { display: grid; gap: 18px; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; text-align: center; }
.stat strong { font-family: var(--serif); font-size: 38px; color: var(--accent); display: block; }
.stat strong span { font-size: 18px; }
.stat span:last-child { color: var(--ink-soft); font-size: 14px; }

/* 服务 */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.service { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; transition: border-color .2s ease; }
.service:hover { border-color: var(--accent); }
.service .num { font-family: var(--serif); font-size: 30px; color: var(--accent); opacity: .55; }
.service h4 { font-size: 19px; margin: 8px 0 8px; }
.service p { color: var(--ink-soft); font-size: 15px; }

/* 联系我们 */
.contact-grid { display: grid; grid-template-columns: 1fr 440px; gap: 52px; align-items: start; }
.contact-info h2 { font-family: var(--serif); font-size: clamp(26px, 3vw, 38px); margin-bottom: 16px; }
.contact-lead { color: var(--ink-soft); margin: 0 0 26px; font-size: 16px; max-width: 34em; }
.contact-list { list-style: none; display: grid; gap: 14px; margin-bottom: 8px; }
.contact-list li { font-size: 16px; }
.contact-list span { display: inline-block; width: 48px; color: var(--accent-dark); font-weight: 600; font-size: 14px; }
.contact-list li a:hover { color: var(--accent); }
.contact-map-wrap { margin-top: 40px; }
.map-caption { text-align: center; color: var(--ink-soft); font-size: 14px; margin-top: 12px; }

/* 地图下方导航按钮（高德 / 百度，国内访客最常用） */
.map-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 14px; }
.map-nav-btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 18px; border-radius: 3px;
  font-size: 13px; letter-spacing: .04em; font-weight: 500;
  color: var(--accent-dark); text-decoration: none;
  background: transparent; border: 1px solid rgba(148, 118, 74, .38);
  transition: background .3s ease, color .3s ease, border-color .3s ease;
}
.map-nav-btn::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.map-nav-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.map-nav-btn:hover::before { background: #fff; }

/* 联系栏二维码（地址时间下方，限宽不超表单） */
.contact-qr { margin-top: 26px; display: flex; flex-direction: column; align-items: flex-start; gap: 12px; text-align: left; }
.contact-qr img { width: 100%; max-width: 420px; height: auto; border-radius: 14px; background: #fff; padding: 12px; box-shadow: 0 10px 34px rgba(60,40,20,0.10); }
.contact-qr-tip { font-size: 14px; color: var(--ink-soft); letter-spacing: .04em; }

/* 联系栏自包含地图：本地底图 + 地址气泡，零外部依赖，任何环境都显示 */
.contact-map {
  position: relative;
  height: clamp(360px, 44vh, 470px);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  box-shadow: 0 18px 50px rgba(60,40,20,.12);
}
.contact-map .map-base {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover; object-position: center;
  display: block;
}
/* 地址气泡（浮于底图上方，呼应中央定位标记） */
.contact-map .map-popup {
  position: absolute; top: 7%; left: 50%;
  transform: translateX(-50%);
  background: rgba(255,255,255,.95);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 16px;
  font-size: 13px; line-height: 1.5; color: var(--ink);
  white-space: nowrap; text-align: center;
  box-shadow: 0 12px 30px rgba(60,40,20,.20);
}
.contact-map .map-popup b {
  display: block; font-size: 14px; font-weight: 600;
  color: var(--accent-dark); margin-bottom: 2px; letter-spacing: .02em;
}

/* 高德动态地图容器：覆盖在本地插画之上，加载成功后显示真实可交互地图 */
.contact-map .map-canvas { position: absolute; inset: 0; }
.contact-map .map-canvas .amap-container { width: 100%; height: 100%; }
/* 地址气泡浮于地图之上 */
.contact-map .map-popup { z-index: 30; }
/* 高德信息窗自定义（古铜金，呼应品牌） */
.amap-info-content { padding: 0 !important; background: transparent !important; box-shadow: none !important; border: none !important; }
.amap-info-card {
  font-family: inherit; padding: 12px 16px; min-width: 200px;
  border: 1px solid var(--line); border-radius: 10px;
  background: #fff; box-shadow: 0 14px 40px rgba(60,40,20,.22);
  text-align: center;
}
.amap-info-card b { display: block; font-size: 14px; font-weight: 600; color: var(--accent-dark); margin-bottom: 3px; }
.amap-info-card span { display: block; font-size: 13px; color: var(--ink-soft); margin-bottom: 10px; }
.amap-info-card .amap-info-actions { display: flex; gap: 8px; justify-content: center; }
.amap-info-card .amap-info-actions a {
  font-size: 12px; text-decoration: none; color: #fff; background: var(--accent);
  padding: 6px 12px; border-radius: 4px; transition: background .25s ease;
}
.amap-info-card .amap-info-actions a:hover { background: var(--accent-dark); }
/* 案例画廊 */
.gallery-section { padding: 72px 0; overflow: hidden; }
.gallery-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.gallery-strip figure {
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #eee;
  position: relative;
  aspect-ratio: 3 / 4;
}
.gallery-strip img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .5s ease;
}
.gallery-strip figure:hover img { transform: scale(1.06); }

/* ============ 产品介绍（依据产品画册整合） ============ */
.product-group { margin-top: 60px; }
.product-group:first-of-type { margin-top: 0; }
.group-title {
  display: flex; align-items: baseline; gap: 14px;
  font-family: var(--serif); font-size: clamp(22px, 2.6vw, 30px);
  margin-bottom: 28px; padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.group-no {
  font-family: var(--serif); font-size: 15px; color: #fff;
  background: var(--accent); width: 34px; height: 34px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  transform: translateY(-3px);
}
.group-en { font-size: 14px; color: var(--ink-soft); font-weight: 400; letter-spacing: 1px; }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .25s ease, box-shadow .25s ease;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product-img { aspect-ratio: 4 / 3; overflow: hidden; background: #eee; }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.product-card:hover .product-img img { transform: scale(1.05); }
.product-info { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.product-model {
  display: inline-block; font-size: 12px; letter-spacing: 1px;
  color: var(--accent-dark); background: rgba(176, 141, 87, .12);
  padding: 3px 10px; border-radius: 999px; width: fit-content; margin-bottom: 12px;
}
.product-info h4 { font-family: var(--serif); font-size: 22px; margin-bottom: 8px; }
.product-info p { color: var(--ink-soft); font-size: 14px; margin-bottom: 16px; }
.product-spec { list-style: none; display: flex; flex-wrap: wrap; gap: 8px 10px; margin-top: auto; }
.product-spec li {
  font-size: 12px; color: var(--ink); background: #f4f1ec;
  border: 1px solid var(--line); padding: 4px 10px; border-radius: 6px;
}
.product-spec.inline { margin-top: 18px; }

/* 非观光 / 液压：图文 feature 布局 */
.product-feature {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 34px; align-items: center;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
}
.product-feature.reverse .product-feature-imgs { order: 2; }
.product-feature-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.product-feature-imgs.single { grid-template-columns: 1fr; }
.product-feature-imgs figure {
  border-radius: var(--radius-sm); overflow: hidden; position: relative;
  background: #eee; aspect-ratio: 4 / 3; margin: 0;
}
.product-feature-imgs img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s ease; }
.product-feature-imgs figure:hover img { transform: scale(1.04); }
.feature-title { font-family: var(--serif); font-size: 26px; margin-bottom: 12px; }
.feature-desc { color: var(--ink-soft); font-size: 15px; }
.feature-label { font-size: 15px; margin: 18px 0 12px; color: var(--ink); font-weight: 600; }
.style-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.style-tags span {
  font-size: 13px; color: var(--accent-dark);
  border: 1px solid rgba(176, 141, 87, .4); border-radius: 999px; padding: 6px 14px;
  background: rgba(176, 141, 87, .06);
}

/* ============ 页脚 ============ */
.footer { background: var(--navy); color: #cfc9bf; padding: 56px 0 0; }
.footer-inner { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; padding-bottom: 36px; }
.footer-brand .brand-mark { color: #fff; }
.footer-brand .brand-sub { color: #b9b3a8; }
.footer-logo { width: 220px; max-width: 70%; height: auto; display: block; }
.footer-brand p { margin-top: 10px; font-size: 14px; color: #9a948a; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px 26px; align-items: center; }
.footer-links a { font-size: 15px; color: #cfc9bf; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); padding: 18px 0; font-size: 13px; color: #8e887e; }
.footer-bottom .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-bottom .beian { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px 16px; font-size: 12px; color: #8e887e; margin-top: 8px; }
.footer-bottom .beian a { color: #8e887e; display: inline-flex; align-items: center; gap: 6px; transition: color .2s ease; }
.footer-bottom .beian a:hover { color: var(--accent); }
.beian-sep { opacity: .45; }
.beian-gongan-icon { width: 14px; height: 14px; display: inline-block; vertical-align: middle; }

/* ============ 滚动渐显 ============ */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============ 响应式 ============ */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .cards, .service-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .custom-grid { grid-template-columns: 1fr; }
  .custom-gallery { grid-template-columns: 1fr; }
  .gallery-strip { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .product-feature { grid-template-columns: 1fr; gap: 24px; }
  .product-feature.reverse .product-feature-imgs { order: 0; }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed; top: 0; right: 0; height: 100vh; width: 78%; max-width: 320px;
    background: #fff; flex-direction: column; align-items: flex-start; justify-content: center;
    gap: 22px; padding: 40px; transform: translateX(100%); transition: transform .3s ease;
    box-shadow: -10px 0 40px rgba(0,0,0,.12); z-index: 60;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-toggle { display: flex; }
  .cards, .service-grid, .custom-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .gallery-strip { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .section { padding: 60px 0; }
  .hero { padding: 48px 0 60px; }
  .topbar-cities { display: none; }
}

/* ============ 产品图可点击提示 ============ */
.product-img { position: relative; cursor: pointer; }
.product-img img, .clickable-fig img { transition: transform .4s ease; }
.product-img:hover img, .clickable-fig:hover img { transform: scale(1.05); }
.clickable-fig { position: relative; cursor: pointer; overflow: hidden; border-radius: var(--radius-sm); }
.series-hint {
  position: absolute; right: 12px; bottom: 12px;
  background: rgba(20, 20, 20, .62); color: #fff;
  font-size: 12px; padding: 6px 12px; border-radius: 999px; letter-spacing: .5px;
  opacity: 0; transform: translateY(6px);
  transition: opacity .25s ease, transform .25s ease; pointer-events: none;
  border: 1px solid rgba(176, 141, 87, .6);
}
.product-img:hover .series-hint, .clickable-fig:hover .series-hint { opacity: 1; transform: none; }
.series-hint.center {
  right: auto; left: 50%; bottom: auto; top: 50%;
  transform: translate(-50%, -50%) scale(.92);
}
.product-img:hover .series-hint.center, .clickable-fig:hover .series-hint.center { transform: translate(-50%, -50%) scale(1); }

/* ============ 灯箱图集 ============ */
.lightbox { position: fixed; inset: 0; z-index: 200; display: none; align-items: center; justify-content: center; padding: 24px; }
.lightbox.open { display: flex; }
.lightbox-backdrop { position: absolute; inset: 0; background: rgba(18, 17, 15, .86); backdrop-filter: blur(6px); }
.lightbox-dialog {
  position: relative; z-index: 1; width: min(960px, 100%); max-height: 92vh;
  background: #fff; border-radius: 18px; overflow: hidden; display: flex; flex-direction: column;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .5); animation: lbPop .3s ease;
}
@keyframes lbPop { from { opacity: 0; transform: translateY(16px) scale(.98); } to { opacity: 1; transform: none; } }
.lightbox-close {
  position: absolute; top: 10px; right: 12px; z-index: 3; width: 40px; height: 40px;
  border: none; border-radius: 50%; background: rgba(0, 0, 0, .35); color: #fff; font-size: 26px; line-height: 1; cursor: pointer;
}
.lightbox-close:hover { background: var(--accent); }
.lightbox-head { padding: 20px 22px 10px; }
.lightbox-model { display: inline-block; font-size: 12px; letter-spacing: 1px; color: var(--accent-dark); background: rgba(176, 141, 87, .12); padding: 4px 12px; border-radius: 999px; }
.lightbox-title { font-family: var(--serif); font-size: 22px; margin-top: 8px; color: var(--ink); }
.lightbox-stage { position: relative; background: #15140f; display: flex; align-items: center; justify-content: center; min-height: 240px; }
.lightbox-img { max-width: 100%; max-height: 56vh; object-fit: contain; display: block; }
.lightbox-nav {
  position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px;
  border: none; border-radius: 50%; background: rgba(255, 255, 255, .16); color: #fff; font-size: 26px; cursor: pointer; z-index: 2;
}
.lightbox-nav:hover { background: var(--accent); }
.lightbox-nav.prev { left: 14px; }
.lightbox-nav.next { right: 14px; }
.lightbox-cap { padding: 12px 22px 4px; color: var(--ink-soft); font-size: 14px; }
.lightbox-thumbs { display: flex; gap: 10px; overflow-x: auto; padding: 10px 22px 18px; }
.lightbox-thumbs img { width: 84px; height: 60px; object-fit: cover; border-radius: 8px; cursor: pointer; border: 2px solid transparent; opacity: .7; transition: .2s; flex: 0 0 auto; }
.lightbox-thumbs img:hover { opacity: 1; }
.lightbox-thumbs img.active { border-color: var(--accent); opacity: 1; }
.lightbox-counter { position: absolute; bottom: 14px; right: 18px; color: rgba(255, 255, 255, .85); font-size: 13px; background: rgba(0, 0, 0, .4); padding: 2px 10px; border-radius: 999px; }

@media (max-width: 720px) {
  .lightbox { padding: 12px; }
  .lightbox-img { max-height: 48vh; }
  .lightbox-thumbs img { width: 64px; height: 46px; }
}


/* ==================================================================
   视觉升级层 2026-11-04 · 静奢克制 + 深色画册章节
   说明：本段为独立覆盖层，上方原有规则全部保留。
   回退方式：删除本段即可恢复旧版（另有 .bak-20261104 完整备份）。
   ================================================================== */

/* 1. 纸感底色：极淡暖光晕 + 几乎不可见的细纹理 */
body {
  line-height: 1.85;
  background-color: var(--bg);
  background-image:
    radial-gradient(1000px 700px at 6% 2%, rgba(148, 118, 74, .055), transparent 62%),
    radial-gradient(860px 620px at 94% 24%, rgba(60, 52, 38, .035), transparent 66%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.022'/%3E%3C/svg%3E");
  background-attachment: fixed, fixed, fixed;
  background-repeat: no-repeat, no-repeat, repeat;
}

/* 2. 板块节奏与留白 */
.section { padding: 104px 0; }
.section-alt {
  background: var(--bg-soft);
  border-top: 1px solid rgba(148, 118, 74, .10);
  border-bottom: 1px solid rgba(148, 118, 74, .10);
}
.trust { background: transparent; border-bottom: 1px solid rgba(148, 118, 74, .14); padding: 52px 0; }
.trust-item strong { font-weight: 400; letter-spacing: .02em; }
.trust-item span:last-child { letter-spacing: .10em; font-size: 13px; }

/* 3. 排版层级：细字距、慢行高、更轻的字重 */
.eyebrow { letter-spacing: .24em; font-size: 12px; font-weight: 500; }
.section-head { max-width: 680px; margin-bottom: 60px; }
.section-head::before { width: 40px; height: 1px; border-radius: 0; margin-bottom: 26px; }
.section-head h2 { letter-spacing: .08em; font-weight: 500; line-height: 1.35; }
.section-sub { line-height: 1.95; letter-spacing: .02em; }
.card p, .service p, .product-info p, .custom-item p, .about-copy p { line-height: 1.9; }
.about-copy h2, .contact-info h2 { font-weight: 500; letter-spacing: .05em; }

/* 4. 去卡片化：留白与细线代替灰框 */
.card, .product-card, .service, .stat, .custom-item, .product-feature {
  border-color: transparent;
  box-shadow: none;
}
.card, .product-card { background: transparent; border-radius: 0; }
.card:hover, .product-card:hover { transform: translateY(-3px); box-shadow: none; }
.card-has-img .card-body { padding: 22px 2px 4px; }
.product-info { padding: 18px 2px 0; }
.product-info h4 { letter-spacing: .04em; }
.card-img-wrap, .product-img, .gallery-main, .gallery-side,
.gallery-strip figure, .about-gallery, .product-feature-imgs figure {
  background: #e9e3d8;
}
.card-img-wrap, .product-img { border-radius: 3px; }
.product-spec li { background: transparent; border-color: var(--line); border-radius: 2px; letter-spacing: .02em; }

.service {
  background: transparent; border-radius: 0; border-top: 1px solid var(--line);
  padding: 26px 18px 26px 0; transition: border-color .35s ease;
}
.service:hover { border-top-color: var(--accent); }
.service .num { opacity: .75; font-size: 26px; letter-spacing: .06em; }
.service h4 { font-family: var(--serif); font-size: 20px; letter-spacing: .04em; }

.stat {
  background: transparent; border-radius: 0; border-bottom: 1px solid var(--line);
  padding: 18px 4px; text-align: left;
}
.stat:last-child { border-bottom: 0; }
.stat strong { font-weight: 400; letter-spacing: .02em; }
.stat span:last-child { letter-spacing: .08em; font-size: 13px; }

.product-feature {
  background: transparent; border-radius: 0; border-top: 1px solid var(--line);
  padding: 30px 0 0;
}
.feature-title { font-weight: 500; letter-spacing: .05em; }

/* 5. 图片动效：幅度收小、时间拉长 */
.card-img-wrap img, .product-img img, .gallery-strip img,
.gallery-main img, .gallery-side img, .about-gallery img,
.product-feature-imgs img, .clickable-fig img, .product-img img {
  transition: transform .8s cubic-bezier(.2, .7, .2, 1);
}
.card-has-img:hover .card-img-wrap img,
.product-card:hover .product-img img,
.gallery-strip figure:hover img,
.gallery-main:hover img, .gallery-side:hover img,
.about-gallery:hover img, .product-feature-imgs figure:hover img,
.product-img:hover img, .clickable-fig:hover img { transform: scale(1.035); }

/* 6. 装饰收敛：胶囊改细线标签、圆章改描边、符号改小圆点 */
.card-tag, .product-model, .lightbox-model {
  background: transparent; border-radius: 0; padding: 0 0 6px; margin-bottom: 14px;
  color: var(--accent-dark); font-size: 11px; font-weight: 600;
  letter-spacing: .20em; text-transform: uppercase;
  border-bottom: 1px solid rgba(148, 118, 74, .38);
}
.group-title { border-bottom-color: rgba(148, 118, 74, .22); letter-spacing: .06em; font-weight: 500; }
.group-no {
  background: transparent; color: var(--accent); font-size: 13px;
  border: 1px solid rgba(148, 118, 74, .55);
}
.group-en { letter-spacing: .16em; font-size: 12px; text-transform: uppercase; }
.hero-points li::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent); top: 11px; left: 2px;
}
.about-list li::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent); top: 12px; left: 2px;
}
.custom-item .dot { width: 6px; height: 6px; margin-top: 10px; }
.style-tags span { border-radius: 2px; letter-spacing: .06em; background: transparent; }

.btn {
  border-radius: 3px; font-weight: 500; letter-spacing: .06em;
  transition: background .3s ease, transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.btn-accent { background: var(--accent); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .14); }
.btn-accent:hover {
  background: var(--accent-dark); transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .14), 0 8px 20px rgba(113, 87, 57, .18);
}
.btn-ghost { border-radius: 3px; letter-spacing: .08em; }
.btn-ghost:hover { box-shadow: none; transform: translateY(-1px); }

/* 7. 功能区域保留必要边界，但更轻 */
.measure-card {
  background: var(--surface); border: 1px solid rgba(229, 223, 212, .9);
  border-radius: 8px; box-shadow: 0 14px 44px rgba(35, 28, 18, .06);
}
.field input, .field select, .field textarea { background: #fbf9f5; border-radius: 4px; }
.contact-qr img { border-radius: 8px; box-shadow: 0 8px 28px rgba(35, 28, 18, .07); }
.nav { background: rgba(250, 248, 244, .90); }
.nav.scrolled { border-color: rgba(148, 118, 74, .16); }
.lang-btn { border-radius: 3px; letter-spacing: .06em; }
.lang-menu { border-radius: 6px; }
.footer { border-top: 1px solid rgba(201, 168, 116, .20); }
.footer-links a { letter-spacing: .06em; font-size: 14px; }
.lightbox-dialog { background: #fdfbf7; border-radius: 8px; }

/* 8. 深色画册章节（细节与工艺 + 家用电梯定制） */
.section-dark {
  position: relative;
  background-color: #191714;
  background-image:
    radial-gradient(90% 62% at 10% 0%, rgba(148, 118, 74, .13), transparent 62%),
    radial-gradient(72% 54% at 90% 100%, rgba(120, 95, 60, .09), transparent 64%);
  color: #ded7cb;
}
.section-dark .section-head::before { background: #c9a874; }
.section-dark .section-head h2 { color: #f5f0e7; }
.section-dark .section-sub { color: #a9a296; }
.section-dark .eyebrow { color: #c9a874; }
.section-dark figcaption {
  background: linear-gradient(transparent, rgba(0, 0, 0, .78));
  color: #f2ece1; letter-spacing: .04em;
}
.section-dark .gallery-strip figure,
.section-dark .gallery-main,
.section-dark .gallery-side,
.section-dark .card-img-wrap { background: #221f1a; border-radius: 3px; }
.section-dark .custom-item {
  background: rgba(255, 255, 255, .035);
  border: 1px solid rgba(255, 255, 255, .09);
  border-top: 1px solid rgba(201, 168, 116, .34);
  border-radius: 3px;
}
.section-dark .custom-item h4 { color: #f2ece1; letter-spacing: .04em; }
.section-dark .custom-item p { color: #a9a296; }
.section-dark .custom-item .dot { background: #c9a874; }
.section-dark .style-tags span { color: #d3b98d; border-color: rgba(201, 168, 116, .40); }

/* 深色底上的黑色产品摄影：补一圈极淡描边，避免图片与背景糊成一片 */
.section-dark .gallery-strip figure,
.section-dark .gallery-main,
.section-dark .gallery-side { border: 1px solid rgba(255, 255, 255, .09); }

/* 相邻两个深色板块之间用极细金线分隔，收紧过大空白，形成一个连续章节 */
.section-dark + .section-dark { border-top: 1px solid rgba(201, 168, 116, .18); padding-top: 72px; }
#custom.section-dark {
  background-color: #1e1b17;
  background-image:
    radial-gradient(80% 56% at 88% 6%, rgba(148, 118, 74, .11), transparent 60%),
    radial-gradient(70% 52% at 8% 100%, rgba(120, 95, 60, .08), transparent 62%);
}

/* 9. 移动端：关掉固定背景，收紧留白 */
@media (max-width: 720px) {
  body { background-attachment: scroll; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 44px; }
  .service { padding: 22px 0; }
  .stat { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  .card-img-wrap img, .product-img img, .gallery-strip img,
  .gallery-main img, .gallery-side img, .about-gallery img,
  .product-feature-imgs img { transition: none; }
}