/* ========================================
   kpeg-clone 全站样式（唯一一份）
   架构对标 lowcarbon-clone：HTML + css/style.css + js/components.js + js/main.js
   皮肤：Flos 式黑白极简（白底 + 黑字 + 黑钮 + 黑页脚），全站无衬线 Jost（本地自托管）
   ======================================== */

:root {
  /* ===== 颜色（Flos 式黑白极简：单黑 + 中性灰，无彩色） ===== */
  --gold:            #1a1a1a;
  --gold-deep:       #000000;
  --gold-soft:       #f2f2f2;
  --ink:             #000000;
  --body:            #000000;
  --muted:           #888888;
  --bg-body:         #ffffff;
  --bg-card:         #f5f5f5;
  --bg-soft:         #efefef;
  --dark:            #232323;
  --dark-2:          #1d1d1d;
  --line:            #e4e4e4;

  --nav-bg:          #ffffff;
  --nav-link:        #000000;
  --footer-bg:       #111111;

  /* ===== 排版（Flos 式：全站无衬线 Jost，标题句子式大小写、紧字距） ===== */
  --font-serif:      'Cormorant Garamond', Georgia, 'Times New Roman', 'Songti SC', serif;
  --font-sans:       'Jost', 'Century Gothic', 'Segoe UI', Arial, sans-serif;
  --font-size-hero:  72px;
  --font-size-h2:    40px;
  --font-size-h2sub: 35px;
  --font-size-card:  20px;
  --font-size-body:  18px;
  --font-size-small: 16px;

  /* ===== 间距与圆角（KPEG 原站微圆角） ===== */
  --spacing-md:      72px 0;
  --container-max:   1300px;
  --card-radius:     3px;
  --pill-radius:     2px;

  /* ===== 动画 ===== */
  --entrance-duration:      0.7s;
  --entrance-delay-stagger: 0.12s;
  --nav-stagger:              0.06s;
  --entrance-easing:        cubic-bezier(.22,.61,.36,1);
  --transition-duration:    0.45s;
  --faq-expand-duration:    0.65s;
  --counter-duration:       1.6s;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--body);
  background: var(--bg-body);
  font-size: var(--font-size-body);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
/* Flos 式全站细颗粒（SVG feTurbulence 噪点 data-URI，无图片文件；静态无动画） */
body::after {
  content: ''; position: fixed; inset: 0; z-index: 9999; pointer-events: none; opacity: .07;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}
button { font-family: var(--font-sans); }
a { text-decoration: none; color: inherit; }
h1, h2, h3 { font-family: var(--font-sans); font-weight: 600; color: #111; letter-spacing: 0; }

.wrap { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--spacing-md); }
.center { text-align: center; }
.band { background: var(--bg-card); }
.eyebrow {
  display: inline-block; font-family: var(--font-sans); font-size: 14px; font-weight: 500;
  letter-spacing: .22em; text-transform: uppercase;
  color: #777; margin-bottom: 12px;
}
.sec-title { font-size: var(--font-size-h2); font-weight: 500; letter-spacing: .01em; text-transform: none; }
.divider { width: 120px; height: 1px; background: #111; margin: 14px auto 36px; }
.small-label { font-family: var(--font-sans); font-size: 16px; font-weight: 500; letter-spacing: .18em; text-transform: uppercase; color: var(--gold-deep); }

/* ===== 按钮（原站：20px/700，padding 12px 24px，无边框） ===== */
.btn {
  display: inline-block; font-family: var(--font-sans); font-size: 20px; font-weight: 600;
  letter-spacing: .02em; text-transform: uppercase; line-height: 1;
  padding: 12px 24px; border: 1px solid transparent; cursor: pointer;
  transition: transform var(--transition-duration), background var(--transition-duration), color var(--transition-duration), border-color var(--transition-duration), box-shadow var(--transition-duration);
}
.btn-gold { background: #fff; color: #000; border-color: #111; }
.btn-gold:hover { background: var(--gold-deep); color: #fff; border-color: var(--gold-deep); }
.btn-white { background: #fff; color: #000; border-color: #fff; }
.btn-white:hover { background: #fff; color: #000; }
.btn .arr { display: inline-block; transition: transform .3s; line-height: 0; }
.btn .arr svg { width: .95em; height: .95em; vertical-align: -0.1em; }
.btn:hover .arr { transform: translateX(4px); }

/* ===== 页眉（Flos 式：logo 左 + 同行导航） ===== */
.site-header { background: var(--nav-bg); text-align: left; padding: 12px 0; border-bottom: 1px solid #eee; transition: box-shadow .3s; }
.site-header .wrap { display: flex; align-items: center; gap: 48px; }
.site-header.scrolled { box-shadow: 0 6px 24px rgba(0,0,0,.08); }
.brand-logo img { width: 170px; height: auto; display: inline-block; filter: grayscale(1); }
.brand-logo-foot img { width: 170px; height: auto; display: inline-block; filter: grayscale(1) invert(1); }
.main-nav { margin-top: 0; display: flex; justify-content: flex-start; gap: 4px; flex-wrap: wrap; position: relative; top: 15px; }
.main-nav a {
  position: relative; font-size: 16px; font-weight: 500; font-style: normal; letter-spacing: normal; text-transform: none;
  color: var(--nav-link); margin: 0 24px 0 0; padding: 4px 0;
}
.main-nav a::after {
  content: ''; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
  background: var(--gold-deep); transition: width .35s var(--entrance-easing);
}
.main-nav a:hover, .main-nav a.active { color: var(--gold-deep); }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }
/* 页眉导航入场：从左往右依次飘落（对标 lowcarbon navItemFadeIn + stagger，fill 用 backwards；
   注意底子不设 opacity:0，否则播完落回透明导致文字消失） */
.js-loaded .main-nav a { animation: navItemFadeIn var(--entrance-duration) var(--entrance-easing) backwards; }
.js-loaded .main-nav a:nth-child(1) { animation-delay: calc(var(--nav-stagger) * 1); }
.js-loaded .main-nav a:nth-child(2) { animation-delay: calc(var(--nav-stagger) * 2); }
.js-loaded .main-nav a:nth-child(3) { animation-delay: calc(var(--nav-stagger) * 3); }
.js-loaded .main-nav a:nth-child(4) { animation-delay: calc(var(--nav-stagger) * 4); }
.js-loaded .main-nav a:nth-child(5) { animation-delay: calc(var(--nav-stagger) * 5); }
.js-loaded .main-nav a:nth-child(6) { animation-delay: calc(var(--nav-stagger) * 6); }
.nav-toggle { display: none; background: none; border: 1px solid #ddd; padding: 7px 10px; margin-top: 10px; cursor: pointer; color: #000; line-height: 0; }
.nav-toggle svg { width: 22px; height: 22px; }

/* ===== Hero（慢速 kenburns + 文案渐入） ===== */
.slider-section { padding: 0; }
.hero {
  position: relative; height: 725px; min-height: 725px; display: flex; align-items: center; justify-content: center;
  text-align: center; overflow: hidden; background: #222;
}
.hero-bg {
  position: absolute; inset: 0; background: #222 center/cover no-repeat;
  animation: heroBgZoom 18s ease-in-out infinite alternate;
}
.hero::after { content: ''; position: absolute; inset: 0; background: linear-gradient(rgba(0,0,0,.28), rgba(0,0,0,.42)); }
.hero-inner { position: relative; z-index: 2; color: #fff; width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 24px; text-align: left; }
.hero-inner h1 { color: #fff; font-style: normal; font-weight: 700; font-size: var(--font-size-hero); line-height: 1.1; letter-spacing: 0; text-shadow: 0 2px 18px rgba(0,0,0,.4); max-width: 640px; }
.hero-kicker { font-size: 14px; font-weight: 500; letter-spacing: .22em; text-transform: uppercase; color: rgba(255,255,255,.85); margin-bottom: 14px; }
.hero-desc { margin-top: 16px; max-width: 560px; font-size: 18px; font-weight: 400; line-height: 1.6; color: rgba(255,255,255,.88); }
.hero-btns { margin-top: 28px; display: flex; gap: 16px; justify-content: flex-start; flex-wrap: wrap; }
/* Flos 式描边按钮：透明底白字，hover 白底黑字 */
.btn-outline { background: transparent; color: #fff; border-color: #fff; }
.btn-outline:hover { background: #fff; color: #000; border-color: #fff; }
.slider-animate .hero-inner { opacity: 0; }
.slider-animate.animate .hero-inner { animation: slideUpFade 1s var(--entrance-easing) .2s forwards; }

/* ===== 重叠白卡 ===== */
.overlap { margin-top: -72px; position: relative; z-index: 3; }
.feature-card {
  background: #fff; border: 1px solid var(--line);
  display: grid; grid-template-columns: 1.1fr 1fr 1fr; border-radius: var(--card-radius); overflow: hidden;
}
.feature-card > div { padding: 34px 30px; border-right: 1px solid var(--line); }
.feature-card > div:last-child { border-right: 0; }
.feature-card p { font-size: 18px; font-weight: 400; line-height: 1.5; color: #000; }
.mini { margin-top: 24px; display: flex; gap: 14px; align-items: flex-start; }
.mini:first-child { margin-top: 0; }
.mini h3 { font-size: 20px; font-weight: 600; font-family: var(--font-sans); letter-spacing: normal; color: #000; text-transform: none; line-height: 1.25; }
.mini .ico { flex: 0 0 30px; color: var(--gold); line-height: 1; margin-top: 2px; }
.mini .ico svg { width: 30px; height: 30px; display: block; transition: transform .3s; }
.mini:hover .ico svg { transform: scale(1.15) rotate(-6deg); }
.mini p { margin-top: 6px; font-size: 16px; font-weight: 400; }

/* ===== 产品 4 卡（图片 zoom +  staggered reveal） ===== */
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; text-align: left; }
.prod {
  background: #f7f7f7; border: 1px solid #eee; border-radius: var(--card-radius); overflow: hidden;
  transition: transform var(--transition-duration), box-shadow var(--transition-duration);
}
.prod:hover { transform: translateY(-6px); }
.prod .imgbox { overflow: hidden; height: 220px; background: #eee; }
.prod img { width: 100%; height: 220px; object-fit: cover; display: block; transition: transform .8s var(--entrance-easing); }
.prod:hover img { transform: scale(1.07); }
.prod span { display: block; font-size: 16px; font-weight: 500; letter-spacing: normal; text-transform: none; color: #000; padding: 12px 14px 14px; text-align: center; }
/* creations 产品卡型号：字大 + 斜体（只作用于 tab 面板，不动 gallery 场景标题） */
.tab-panel .prod span { font-size: 19px; font-style: italic; }
.prod-cta {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  background: var(--dark); color: #fff; min-height: 276px; border-radius: var(--card-radius);
  transition: background var(--transition-duration);
}
.prod-cta:hover { background: #333; }
.prod-cta strong { font-family: var(--font-sans); font-size: 22px; font-weight: 600; }
.wavy { max-width: var(--container-max); margin: 30px auto 0; border-top: 2px dotted #d9c7a8; opacity: .7; }

/* ===== Collection tabs（纯 CSS radio 版，无需 JS；面板切换复用 fadeInUp） ===== */
.tabs { margin-top: 6px; }
.tab-radio { position: absolute; opacity: 0; pointer-events: none; }
.tab-labels { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin: 26px 0 34px; }
.tab-btn {
  display: inline-block; font-family: var(--font-sans); font-size: 18px; font-weight: 600;
  letter-spacing: .04em; text-transform: uppercase; line-height: 1;
  padding: 12px 26px; border: 1px solid var(--line); background: #fff; color: #000; cursor: pointer;
  transition: background var(--transition-duration), color var(--transition-duration), border-color var(--transition-duration);
}
.tab-btn:hover { border-color: var(--gold); color: var(--gold-deep); }
.tab-panel { display: none; }
.tab-panel .tab-intro { max-width: 760px; margin: 0 auto 28px; }
#tabWall:checked ~ .tab-labels label[for="tabWall"],
#tabCeil:checked ~ .tab-labels label[for="tabCeil"],
#tabPier:checked ~ .tab-labels label[for="tabPier"] { background: var(--gold); border-color: var(--gold); color: #fff; }
#tabWall:checked ~ #panelWall, #tabCeil:checked ~ #panelCeil, #tabPier:checked ~ #panelPier { display: block; }
#tabWall:checked ~ #panelWall.tab-panel, #tabCeil:checked ~ #panelCeil.tab-panel,
#tabPier:checked ~ #panelPier.tab-panel { animation: fadeInUp .5s var(--entrance-easing); }

/* Ceiling tab 内分页（纯 CSS radio，与 tab 面板同原理；动画类不新增） */
.ceil-p2 { display: none; }
#ceilPage2:checked ~ .ceil-p1 { display: none; }
#ceilPage2:checked ~ .ceil-p2 { display: grid; }
#ceilPage1:checked ~ .pager-ceil label[for="ceilPage1"],
#ceilPage2:checked ~ .pager-ceil label[for="ceilPage2"] { background: var(--gold); border-color: var(--gold); color: #fff; }

/* ===== 双栏图文（左右滑入） ===== */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: center; }
.split h2 { font-size: var(--font-size-h2sub); font-weight: 500; line-height: 1.2; margin: 8px 0 14px; text-transform: none; }
.split p { font-size: 18px; font-weight: 400; line-height: 1.5; color: #000; }
.split img.frame { width: 100%; height: auto; display: block; object-fit: cover; border-radius: var(--card-radius); aspect-ratio: 4/3; }
/* Bespoke 头部：文字多占，图高与模块齐平、顶对齐不裁头 */
.split-hero { grid-template-columns: 1.25fr .75fr; }
.split-hero .img-zoom { height: 100%; }
.split-hero img.frame { aspect-ratio: auto; height: 100%; object-fit: cover; object-position: top; }
/* Company Anatomy（对标原站：图占约 1/3 宽、高约 265px；图右 band 另加 .split-flip） */
.split-anatomy { grid-template-columns: 1fr 2fr; }
.split-anatomy.split-flip { grid-template-columns: 2fr 1fr; }
.split-anatomy img.frame { aspect-ratio: auto; height: 265px; }
.img-zoom { overflow: hidden; border-radius: var(--card-radius); }
/* Custom Commissions 左列双小图（对标原站：column + gap 20px，第二张右对齐上叠 30px，单张约 420×280） */
.img-stack { display: flex; flex-direction: column; gap: 20px; padding-top: 30px; }
.img-stack .img-zoom { width: 70%; max-width: 422px; }
.img-stack .img-zoom:nth-child(2) { align-self: flex-end; margin-top: -30px; }
.img-stack .img-zoom img { aspect-ratio: 3/2; }
.img-zoom img { transition: transform .8s var(--entrance-easing); }
.img-zoom:hover img { transform: scale(1.05); }
.btn-row { margin-top: 22px; display: flex; gap: 14px; flex-wrap: wrap; }
.quote-card { background: #f5f5f5; border: 1px solid var(--line); padding: 38px 34px; border-radius: var(--card-radius); }
.float-badge {
  display: inline-block; margin-top: 16px; background: var(--dark); color: #fff;
  font-family: var(--font-sans); font-size: 14px;
  letter-spacing: .1em; padding: 10px 18px; border-radius: var(--pill-radius);
  animation: floatY 4s ease-in-out infinite;
}

/* ===== 订阅条 ===== */
.sub {
  background: var(--bg-soft); padding: 24px 30px; display: flex; align-items: center;
  justify-content: space-between; gap: 20px; border-radius: var(--card-radius);
}
.sub h2 { font-size: 40px; font-weight: 500; color: #000; letter-spacing: 0; }
.sub p { font-family: var(--font-sans); font-size: 16px; font-weight: 500; color: #000; margin-top: 4px; }

/* ===== 深色报价区（含数字滚动） ===== */
.dark { background: var(--dark); color: #ddd; }
.dark h2 { color: #fff; }
.dark-grid { display: grid; grid-template-columns: 1fr .9fr 1fr; gap: 40px; align-items: center; padding: 60px 0; }
.dark p { font-size: 18px; font-weight: 400; line-height: 1.5; color: #bbb; }
.portrait { width: 100%; max-width: 360px; height: auto; margin: 0 auto; display: block; border-radius: var(--card-radius); object-fit: cover; background: transparent; }
.paper { background: var(--gold-soft); color: #333; font-family: var(--font-sans); font-size: 18px; font-weight: 500; line-height: 1.5; padding: 24px; border-radius: var(--card-radius); }
.stats { display: flex; gap: 28px; margin-top: 22px; }
.stat b { display: block; font-family: var(--font-sans); font-size: 34px; color: #fff; font-weight: 600; }
.stat span { font-family: var(--font-sans); font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: #999; }

/* ===== 询价表单（共享组件） ===== */
.contact-section { background: var(--bg-card); }
.container-narrow { max-width: 800px; margin: 0 auto; padding: 0 24px; }
.contact-title h2 { font-size: var(--font-size-h2); font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.section-subtitle { font-family: var(--font-sans); color: var(--muted); font-size: 16px; font-weight: 500; margin-top: 6px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-family: var(--font-sans); font-size: 14px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.field input, .field textarea {
  width: 100%; border: 1px solid #ccc; background: #fff; padding: 11px 12px; font-size: 16px;
  font-family: var(--font-sans); border-radius: var(--pill-radius); transition: border-color .3s, box-shadow .3s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: #111; box-shadow: 0 0 0 3px rgba(0,0,0,.12); }
/* 询盘表单：蜜罐（人看不见）+ 提交状态提示 */
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-note { font-size: 15px; margin: 0 0 14px; }
.form-note.ok { color: #1e7e34; }
.form-note.err { color: #b3261e; }

/* ===== 页脚（共享组件，Flos 式黑底白字） ===== */
.site-footer { padding: 52px 0 0; background: var(--footer-bg); color: #fff; }
.foot-grid { display: grid; grid-template-columns: 1.1fr .8fr 1.1fr; gap: 32px; }
.foot-grid h4 { font-family: var(--font-sans); color: #fff; font-size: 22px; font-weight: 500; margin: 14px 0 10px; }
.foot-grid li { list-style: none; font-family: var(--font-sans); font-size: 16px; font-weight: 400; margin: 5px 0; color: #ccc; }
.foot-blurb { font-size: 18px; font-weight: 400; color: #ccc; margin-top: 14px; max-width: 340px; }
.flink-list { list-style: none; }
.flink-list li { list-style: none; margin: 3px 0; }
/* 快链：左侧箭头 + hover 右滑 + 下划线生长（lowcarbon footer-link 式；柔和缓动：只用站内变量时长） */
.flink { display: inline-flex; align-items: center; gap: 8px; font-size: 18px; font-weight: 400; color: #fff; position: relative; padding-bottom: 2px; transition: color var(--transition-duration) ease; }
.flink svg { width: 14px; height: 14px; color: #fff; }
.flink::after { content: ''; position: absolute; bottom: 0; left: 22px; width: 0; height: 1px; background: #fff; transition: width var(--transition-duration) ease; }
.flink:hover { color: #fff; }
.flink:hover::after { width: calc(100% - 22px); }
/* 地址项：圆形图标 + hover 填充 */
.contact-item { display: flex; gap: 12px; align-items: flex-start; margin: 12px 0; font-size: 17px; font-weight: 400; color: #eee; }
.contact-item a:hover { color: #fff; }
.contact-ico { flex: 0 0 34px; width: 34px; height: 34px; border: 1px solid #444; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; color: #fff; background: transparent; transition: background .3s, color .3s, transform .3s; }
.contact-ico svg { width: 17px; height: 17px; }
.contact-item:hover .contact-ico { background: #fff; border-color: #fff; color: #111; transform: translateY(-2px); }
/* 底栏：版权左 + 社交右 */
.copy-inner { max-width: 1300px; margin: 0 auto; padding: 0 24px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.social-row { display: inline-flex; gap: 12px; }
.social-icon { width: 36px; height: 36px; border: 1px solid rgba(255,255,255,.28); border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; color: #cfcfcf; transition: background .3s, border-color .3s, color .3s, transform .3s; }
.social-icon svg { width: 17px; height: 17px; }
.social-icon:hover { background: #fff; border-color: #fff; color: #111; transform: translateY(-3px); }
.js-loaded .footer-animate .social-icon { opacity: 0; }
.footer-animate.animate .social-icon { animation: fadeInUp .45s var(--entrance-easing) forwards; }
.footer-animate.animate .social-icon:nth-child(1) { animation-delay: .5s; }
.footer-animate.animate .social-icon:nth-child(2) { animation-delay: .62s; }
.footer-animate.animate .social-icon:nth-child(3) { animation-delay: .74s; }
/* lowcarbon 式加场：标题分隔线生长、金钮扫光、产品卡底线 */
.js-loaded .cards-grid-section .divider { transform: scaleX(0); }
.cards-grid-section.animate .divider { animation: growX .8s var(--entrance-easing) .15s forwards; }
.btn-gold { position: relative; overflow: hidden; }
.btn-gold::after { content: ''; position: absolute; top: 0; left: -80%; width: 50%; height: 100%; background: linear-gradient(100deg, transparent, rgba(255,255,255,.45), transparent); transform: skewX(-20deg); transition: left .6s ease; }
.btn-gold:hover::after { left: 130%; }
.prod { position: relative; }
.prod::after { content: ''; position: absolute; left: 0; bottom: 0; height: 2px; width: 0; background: var(--gold); transition: width .45s var(--entrance-easing); }
.prod:hover::after { width: 100%; }
/* Inspiration gallery：默认无白条无字，hover 才浮现标题（句首大写，非全大写） */
.insp-gal .prod span {
  position: absolute; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,.94); text-transform: none;
  opacity: 0; transform: translateY(10px);
  transition: opacity var(--transition-duration) ease, transform var(--transition-duration) var(--entrance-easing);
}
.insp-gal .prod:hover span, .insp-gal .prod:focus-within span { opacity: 1; transform: none; }

/* ===== FAQ 手风琴（一层层 fade-up 入场 + 平滑展开；动画参数只用站内变量） ===== */
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: var(--card-radius); overflow: hidden; }
.faq-item .faq-q { display: flex; align-items: center; justify-content: space-between; gap: 16px; width: 100%; padding: 18px 22px; cursor: pointer; background: none; border: 0; font-family: inherit; text-align: left; }
.faq-item .faq-qtext { font-size: 20px; font-weight: 600; color: #000; }
.faq-plus { flex: 0 0 30px; width: 30px; height: 30px; border: 1px solid var(--line); border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 400; line-height: 1; color: #000; transition: transform var(--transition-duration) var(--entrance-easing), background var(--transition-duration), color var(--transition-duration); }
.faq-item.open .faq-plus { transform: rotate(45deg); background: var(--gold); border-color: var(--gold); color: #fff; }
/* 内容常驻渲染（非 details），grid-rows 过渡可双向播放；无 JS 时全展开 */
.faq-body { display: grid; grid-template-rows: 1fr; transition: grid-template-rows var(--faq-expand-duration) var(--entrance-easing); }
.faq-list.faq-js .faq-body { grid-template-rows: 0fr; }
.faq-list.faq-js .faq-item.open .faq-body { grid-template-rows: 1fr; }
.faq-body > div { overflow: hidden; min-height: 0; }
.faq-body p { padding: 0 22px 20px; font-size: 18px; font-weight: 400; color: #000; }
/* 入场：一层层 fade-up（forwards 保持终帧，底子 opacity:0 只在播前兜底） */
.js-loaded .faq-animate .faq-item { opacity: 0; }
.faq-animate.animate .faq-item { animation: fadeInUp var(--entrance-duration) var(--entrance-easing) forwards; }
.faq-animate.animate .faq-item:nth-child(1) { animation-delay: calc(var(--entrance-delay-stagger) * 1); }
.faq-animate.animate .faq-item:nth-child(2) { animation-delay: calc(var(--entrance-delay-stagger) * 2); }
.faq-animate.animate .faq-item:nth-child(3) { animation-delay: calc(var(--entrance-delay-stagger) * 3); }
.faq-animate.animate .faq-item:nth-child(4) { animation-delay: calc(var(--entrance-delay-stagger) * 4); }
.faq-animate.animate .faq-item:nth-child(5) { animation-delay: calc(var(--entrance-delay-stagger) * 5); }
.faq-animate.animate .faq-item:nth-child(6) { animation-delay: calc(var(--entrance-delay-stagger) * 6); }

/* ===== 工序卡（Our Workshop 专用，与产品 .prod 区分：全图底 + 下半部半透明白条，hover 盖满全图） ===== */
.journey-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; text-align: left; }
.journey-card {
  position: relative; display: block; min-height: 330px;
  background: #eee; border: 1px solid var(--line); border-top: 3px solid var(--gold);
  border-radius: var(--card-radius); overflow: hidden; text-align: left;
  transition: transform var(--transition-duration);
}
.journey-media { position: absolute; inset: 0; background: #eee; }
.journey-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 30%; display: block; transition: transform .8s var(--entrance-easing); }
.journey-media img.focus-low { object-position: center 62%; }
.journey-card:hover .journey-media img { transform: scale(1.05); }
.journey-num {
  position: absolute; left: 12px; top: 12px; width: 38px; height: 38px; border-radius: 50%;
  background: var(--dark); color: #fff; font-family: var(--font-sans); font-size: 15px; font-weight: 600;
  display: inline-flex; align-items: center; justify-content: center; letter-spacing: .02em; z-index: 2;
}
.journey-body {
  position: absolute; left: 0; right: 0; bottom: 0; height: 28%; min-height: 28%; overflow: hidden; z-index: 1;
  background: #fff;
  border-top: 1px solid #111; padding: 8px 14px;
  display: block;
  transition: height .5s ease-in-out, background .5s ease-in-out, min-height .5s ease-in-out;
}
.journey-card:hover .journey-body, .journey-card:focus-within .journey-body { height: 100%; min-height: 100%; background: #fff; display: flex; flex-direction: column; justify-content: center; }
.journey-body h3 { font-size: 20px; font-weight: 700; color: #000; letter-spacing: normal; text-transform: none; margin: 0; }
.journey-body p { font-size: 15px; font-weight: 400; line-height: 1.5; color: #000; margin-top: 4px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.journey-card:hover .journey-body p, .journey-card:focus-within .journey-body p { display: block; }
/* Journey 高卡（挂 .journey-tall 的区：卡 425px 高，图顶对齐自然比例，
   白条默认 1/4 高并把媒体底色改白，盖住图下留白；hover 盖满行为不变 */
.journey-tall .journey-card { min-height: 425px; }
.journey-tall .journey-media { inset: 0 0 auto 0; background: #fff; }
.journey-tall .journey-media img { position: relative; inset: auto; width: 100%; height: auto; }
.journey-tall .journey-body { height: 25%; min-height: 25%; }
@keyframes growX { to { transform: scaleX(1); } }
.copy { background: var(--dark-2); color: #aaa; text-align: center; font-family: var(--font-sans); font-size: 14px; padding: 13px; margin-top: 44px; }
.foot-grid li a { position: relative; transition: color .3s; }
.foot-grid li a:hover { color: #fff; }

/* ===== 回顶 ===== */
.to-top {
  position: fixed; right: 22px; bottom: 22px; width: 44px; height: 44px; border: none; cursor: pointer;
  background: var(--gold); color: #fff; border-radius: 50%;
  opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s, background .3s; z-index: 50;
  line-height: 0;
}
.to-top svg { width: 20px; height: 20px; }
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { background: var(--gold-deep); transform: translateY(-3px); }

/* ===== 入场动画体系（JS 只加 .animate，效果全在 CSS） ===== */
.js-loaded .reveal-up { opacity: 0; }
.reveal-up.animate { animation: fadeInUp var(--entrance-duration) var(--entrance-easing) forwards; }
.js-loaded .reveal-left { opacity: 0; }
.reveal-left.animate { animation: slideInLeft var(--entrance-duration) var(--entrance-easing) forwards; }
.js-loaded .reveal-right { opacity: 0; }
.reveal-right.animate { animation: slideInRight var(--entrance-duration) var(--entrance-easing) forwards; }
.js-loaded .cards-grid-section .card-animated { opacity: 0; }
.cards-grid-section.animate .card-animated,
.cards-grid-section .card-animated.animate { animation: cardReveal .55s var(--entrance-easing) forwards; }
.cards-grid-section.animate .card-animated:nth-child(1) { animation-delay: 0s; }
.cards-grid-section.animate .card-animated:nth-child(2) { animation-delay: var(--entrance-delay-stagger); }
.cards-grid-section.animate .card-animated:nth-child(3) { animation-delay: calc(var(--entrance-delay-stagger) * 2); }
.cards-grid-section.animate .card-animated:nth-child(4) { animation-delay: calc(var(--entrance-delay-stagger) * 3); }
.js-loaded .contact-animate .contact-field { opacity: 0; }
.contact-animate.animate .contact-field { animation: fadeInUp .6s var(--entrance-easing) forwards; }
.contact-animate.animate .contact-field:nth-child(1) { animation-delay: 0s; }
.contact-animate.animate .contact-field:nth-child(2) { animation-delay: .1s; }
.contact-animate.animate .contact-field:nth-child(3) { animation-delay: .2s; }
.js-loaded .footer-animate .footer-col { opacity: 0; }
.footer-animate.animate .footer-col { animation: fadeInUp .6s var(--entrance-easing) forwards; }
.footer-animate.animate .footer-col:nth-child(2) { animation-delay: .12s; }
.footer-animate.animate .footer-col:nth-child(3) { animation-delay: .24s; }
/* 页脚快链入场：从左往右依次飘落（挂在既有 footer-animate 观察器下，无需改 JS；
   播前由父列 opacity:0 兜底，自身不设 opacity:0，播完回归自然可见） */
.footer-animate.animate .flink-list li { animation: navItemFadeIn var(--entrance-duration) var(--entrance-easing) backwards; }
.footer-animate.animate .flink-list li:nth-child(1) { animation-delay: calc(.2s + var(--nav-stagger) * 1); }
.footer-animate.animate .flink-list li:nth-child(2) { animation-delay: calc(.2s + var(--nav-stagger) * 2); }
.footer-animate.animate .flink-list li:nth-child(3) { animation-delay: calc(.2s + var(--nav-stagger) * 3); }
.footer-animate.animate .flink-list li:nth-child(4) { animation-delay: calc(.2s + var(--nav-stagger) * 4); }
.footer-animate.animate .flink-list li:nth-child(5) { animation-delay: calc(.2s + var(--nav-stagger) * 5); }
.footer-animate.animate .flink-list li:nth-child(6) { animation-delay: calc(.2s + var(--nav-stagger) * 6); }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideUpFade { from { opacity: 0; transform: translateY(34px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideInLeft { from { opacity: 0; transform: translateX(-36px); } to { opacity: 1; transform: translateX(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(36px); } to { opacity: 1; transform: translateX(0); } }
@keyframes cardReveal { from { opacity: 0; transform: translateY(30px) scale(.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
/* 导航飘落（对标 lowcarbon navItemFadeIn）：结束帧用 none 而非 translateY(0)，播完回归自然样式 */
@keyframes navItemFadeIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: none; } }
@keyframes heroBgZoom { from { transform: scale(1); } to { transform: scale(1.12); } }
@keyframes floatY { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* 无 JS 也可见（渐进增强） */
.no-js .reveal-up, .no-js .reveal-left, .no-js .reveal-right,
.no-js .cards-grid-section .card-animated, .no-js .contact-animate .contact-field,
.no-js .footer-animate .footer-col, .no-js .faq-animate .faq-item, .no-js .slider-animate .hero-inner { opacity: 1 !important; animation: none !important; }

/* 减少动态偏好：直接显示，无动画 */
@media (prefers-reduced-motion: reduce) {
  .hero-bg { animation: none; }
  .float-badge { animation: none; }
  .js-loaded .main-nav a, .js-loaded .footer-animate .flink-list li { animation: none !important; }
  .js-loaded .reveal-up, .js-loaded .reveal-left, .js-loaded .reveal-right,
  .js-loaded .cards-grid-section .card-animated, .js-loaded .contact-animate .contact-field,
  .js-loaded .footer-animate .footer-col, .js-loaded .faq-animate .faq-item, .slider-animate .hero-inner { opacity: 1 !important; animation: none !important; }
  html { scroll-behavior: auto; }
}

/* ===== 响应式（三断点） ===== */
@media (max-width: 991px) {
  :root { --font-size-hero: 46px; --font-size-h2: 32px; --font-size-h2sub: 28px; }
  .hero { height: 560px; min-height: 520px; }
  .grid4 { grid-template-columns: repeat(2, 1fr); }
  .journey-grid { grid-template-columns: 1fr; }
  .journey-card { min-height: 340px; }
  .split, .split-anatomy, .split-anatomy.split-flip, .split-hero, .dark-grid, .foot-grid { grid-template-columns: 1fr; }
  .feature-card { grid-template-columns: 1fr; }
  .feature-card > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .feature-card > div:last-child { border-bottom: 0; }
  .overlap { margin-top: 0; }
  .sub { flex-direction: column; text-align: center; }
}
@media (max-width: 767px) {
  :root { --font-size-hero: 36px; --font-size-h2: 28px; --font-size-h2sub: 24px; }
  .hero { height: 460px; min-height: 420px; }
  .grid4 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-block; margin-top: 0; }
  .site-header .wrap { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; }
  .sub h2 { font-size: 28px; }
  .copy-inner { flex-direction: column; text-align: center; }
  .main-nav { display: none; flex-direction: column; gap: 2px; margin-top: 10px; padding-bottom: 8px; flex-basis: 100%; top: 0; }
  .main-nav a { margin: 0; }
  .main-nav.open { display: flex; animation: fadeInUp .4s var(--entrance-easing); }
  .stats { flex-wrap: wrap; gap: 18px; }
}