/* ============================================================
   LUMSIC — design system
   Reference language: ERCO / iGuzzini — white paper, hairline rules,
   oversized grotesque type, image-first, one accent colour.
   ============================================================ */

:root {
  --ink: #14140F;
  --ink-2: #3A3A33;
  --muted: #6E6E64;
  --muted-2: #94948A;
  --line: #E3E0D8;
  --line-strong: #CFCBBF;
  --paper: #FFFFFF;
  --paper-warm: #F7F5F0;
  --paper-warm-2: #EFECE4;
  --dark: #0E0E0C;
  --dark-2: #1A1A17;
  --accent: #B0742F;
  --accent-soft: #F3E4CE;
  --accent-glow: #E8B96F;

  --gutter: 40px;
  --maxw: 1520px;
  --nav-h: 76px;
  --radius: 2px;

  --fs-display: clamp(44px, 6.6vw, 112px);
  --fs-h1: clamp(34px, 4.4vw, 64px);
  --fs-h2: clamp(26px, 2.9vw, 42px);
  --fs-h3: clamp(19px, 1.7vw, 24px);
  --fs-body: 15.5px;
  --fs-sm: 13.5px;
  --fs-xs: 11.5px;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", "Segoe UI", -apple-system, BlinkMacSystemFont, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: var(--fs-body);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
::selection { background: var(--accent-soft); }

/* ---------- layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.wrap-narrow { max-width: 980px; margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- type ---------- */
.display {
  font-size: var(--fs-display);
  line-height: .96;
  letter-spacing: -.035em;
  font-weight: 500;
  margin: 0;
}
h1, .h1 {
  font-size: var(--fs-h1);
  line-height: 1.03;
  letter-spacing: -.028em;
  font-weight: 500;
  margin: 0;
}
h2, .h2 {
  font-size: var(--fs-h2);
  line-height: 1.1;
  letter-spacing: -.022em;
  font-weight: 500;
  margin: 0;
}
h3, .h3 {
  font-size: var(--fs-h3);
  line-height: 1.28;
  letter-spacing: -.012em;
  font-weight: 500;
  margin: 0;
}
p { margin: 0 0 1.05em; }
p:last-child { margin-bottom: 0; }

.eyebrow {
  font-size: var(--fs-xs);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}
.lead { font-size: clamp(17px, 1.35vw, 20px); line-height: 1.55; color: var(--ink-2); letter-spacing: -.008em; }
.small { font-size: var(--fs-sm); color: var(--muted); }
.tiny { font-size: var(--fs-xs); letter-spacing: .06em; color: var(--muted-2); }

/* section label — "01 / Products" */
.sec-label {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}
.sec-label .num { font-size: var(--fs-xs); letter-spacing: .14em; color: var(--accent); font-variant-numeric: tabular-nums; }
.sec-label .txt { font-size: var(--fs-xs); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); }
.sec-label .spacer { flex: 1; }
.sec-label .aside { font-size: var(--fs-xs); color: var(--muted-2); letter-spacing: .06em; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 80;
  height: var(--nav-h);
  background: rgba(255,255,255,.94);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  height: 100%;
  display: flex; align-items: center; gap: 40px;
  max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter);
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand .brand-logo { height: 25px; width: auto; display: block; }
.brand .brand-div { width: 1px; height: 20px; background: var(--line); }
.brand .sub {
  font-size: 9px; letter-spacing: .3em; text-transform: uppercase; color: var(--muted-2);
  display: block;
}
.nav { display: flex; align-items: center; gap: 34px; margin-left: auto; }
.nav a {
  font-size: 13.5px; letter-spacing: .02em; color: var(--ink-2);
  padding: 6px 0; position: relative;
}
.nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform .32s var(--ease);
}
.nav a:hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); }
.header-cta {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 13px; letter-spacing: .04em;
  border: 1px solid var(--ink); padding: 10px 18px; border-radius: 999px;
  transition: background .25s var(--ease), color .25s var(--ease);
  white-space: nowrap;
}
.header-cta:hover { background: var(--ink); color: #fff; }
.header-cta svg { width: 13px; height: 13px; }
/* link label + icon are swapped at runtime from the admin 「链接管理」 page */
.lk-ic { display: inline-flex; align-items: center; }
.lk-ic:empty { display: none; }

.burger {
  display: none; width: 44px; height: 44px; margin-left: auto;
  background: none; border: 0; padding: 0; cursor: pointer;
  position: relative;
}
.burger span {
  position: absolute; left: 10px; right: 10px; height: 1.5px; background: var(--ink);
  transition: transform .3s var(--ease), opacity .2s;
}
.burger span:nth-child(1) { top: 18px; }
.burger span:nth-child(2) { top: 25px; }
body.menu-open .burger span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
body.menu-open .burger span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: var(--nav-h) 0 0 0; background: var(--paper); z-index: 79;
  padding: 34px var(--gutter); display: none; overflow-y: auto;
}
body.menu-open .mobile-menu { display: block; }
.mobile-menu a {
  display: block; font-size: 26px; letter-spacing: -.02em; padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.mobile-menu .mm-foot { margin-top: 34px; display: grid; gap: 10px; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  background: var(--dark);
  color: #F4F2ED;
  overflow: hidden;
  min-height: min(86vh, 820px);
  display: flex; flex-direction: column; justify-content: flex-end;
}
.hero-media { position: absolute; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; opacity: .92; }
.hero-media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(14,14,12,.55) 0%, rgba(14,14,12,.12) 38%, rgba(14,14,12,.82) 100%);
}
.hero-inner { position: relative; z-index: 2; width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter) 44px; }
.hero .eyebrow { color: rgba(244,242,237,.62); margin-bottom: 26px; }
.hero .display { max-width: 15ch; }
.hero-bottom {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px;
  align-items: end; margin-top: 46px; padding-top: 26px;
  border-top: 1px solid rgba(244,242,237,.22);
}
.hero-bottom p { color: rgba(244,242,237,.78); max-width: 46ch; font-size: 15px; line-height: 1.65; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: flex-end; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 26px; border-radius: 999px; font-size: 13.5px; letter-spacing: .03em;
  border: 1px solid transparent; cursor: pointer; transition: all .25s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 14px; height: 14px; }
.btn-solid { background: #F4F2ED; color: var(--ink); }
.btn-solid:hover { background: #fff; transform: translateY(-1px); }
.btn-ghost { border-color: rgba(244,242,237,.34); color: #F4F2ED; }
.btn-ghost:hover { border-color: #F4F2ED; background: rgba(244,242,237,.08); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #000; transform: translateY(-1px); }
.btn-outline { border-color: var(--line-strong); color: var(--ink); }
.btn-outline:hover { border-color: var(--ink); }
.btn-sm { padding: 10px 18px; font-size: 12.5px; }

/* ---------- generic sections ---------- */
.section { padding: 96px 0; }
.section-tight { padding: 64px 0; }
.section-warm { background: var(--paper-warm); }
.section-dark { background: var(--dark); color: #F4F2ED; }
.section-dark .sec-label { border-color: rgba(244,242,237,.18); }
.section-dark .sec-label .txt { color: rgba(244,242,237,.55); }
.section-dark .sec-label .aside { color: rgba(244,242,237,.4); }
.section-dark p { color: rgba(244,242,237,.72); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.split-wide { grid-template-columns: 1.15fr .85fr; }

/* ---------- category tiles ---------- */
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.tile {
  position: relative; display: block; background: var(--paper-warm-2);
  aspect-ratio: 4 / 5; overflow: hidden; border-radius: var(--radius);
}
.tile img, .tile .ph { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .9s var(--ease); }
.tile:hover img, .tile:hover .ph { transform: scale(1.035); }
.tile .cap {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 20px 20px 18px;
  background: linear-gradient(180deg, transparent, rgba(14,14,12,.62));
  color: #fff;
}
.tile .cap .t { font-size: 16px; letter-spacing: -.01em; }
.tile .cap .c { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: rgba(255,255,255,.66); margin-top: 4px; }
.tile.is-soon .cap { background: linear-gradient(180deg, transparent, rgba(14,14,12,.72)); }
.tile .tag-soon {
  position: absolute; top: 16px; left: 16px; font-size: 10px; letter-spacing: .16em;
  text-transform: uppercase; background: rgba(255,255,255,.92); color: var(--ink);
  padding: 5px 9px; border-radius: 999px;
}

/* ---------- product grid ---------- */
.grid-products { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px 24px; }
.card { display: block; position: relative; }
.card .shot {
  position: relative; aspect-ratio: 1 / 1; background: var(--paper-warm);
  overflow: hidden; border-radius: var(--radius); display: grid; place-items: center;
}
.card .shot img, .card .shot .ph { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.card:hover .shot img, .card:hover .shot .ph { transform: scale(1.03); }
.card .badge {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  background: var(--ink); color: #fff; font-size: 10px; letter-spacing: .14em;
  text-transform: uppercase; padding: 5px 9px; border-radius: 999px;
}
.card .meta { padding-top: 16px; display: flex; align-items: baseline; gap: 14px; }
.card .meta .n { font-size: 15.5px; letter-spacing: -.01em; }
.card .meta .arrow { margin-left: auto; opacity: 0; transform: translateX(-6px); transition: all .3s var(--ease); }
.card:hover .meta .arrow { opacity: 1; transform: translateX(0); }
.card .sub { font-size: 13px; color: var(--muted); margin-top: 3px; }

/* ---------- numbers strip ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(244,242,237,.16); }
.stats .item { background: var(--dark); padding: 32px 26px; }
.stats .v { font-size: clamp(30px, 3vw, 44px); letter-spacing: -.03em; line-height: 1; font-weight: 500; }
.stats .k { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: rgba(244,242,237,.5); margin-top: 12px; }

/* ---------- editorial blocks ---------- */
.editorial { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: center; }
.figure-wide { position: relative; overflow: hidden; background: var(--paper-warm-2); aspect-ratio: 16/10; border-radius: var(--radius); }
.figure-wide img, .figure-wide .ph { width: 100%; height: 100%; object-fit: cover; }

.list-num { list-style: none; padding: 0; margin: 0; }
.list-num li { display: grid; grid-template-columns: 44px 1fr; gap: 20px; padding: 22px 0; border-top: 1px solid var(--line); }
.list-num li:last-child { border-bottom: 1px solid var(--line); }
.list-num .i { font-size: 11px; letter-spacing: .14em; color: var(--accent); padding-top: 4px; }
.list-num h4 { margin: 0 0 5px; font-size: 16px; font-weight: 500; letter-spacing: -.01em; }
.list-num p { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.6; }

/* ---------- footer ---------- */
.site-footer { background: var(--dark); color: #EDEAE3; padding: 78px 0 30px; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 56px; border-bottom: 1px solid rgba(237,234,227,.14); }
.footer-top .brand .brand-div { background: rgba(237,234,227,.25); }
.footer-top .brand .sub { color: rgba(237,234,227,.45); }
.footer-blurb { margin-top: 20px; max-width: 34ch; font-size: 13.5px; color: rgba(237,234,227,.62); line-height: 1.7; }
.fcol h5 {
  margin: 0 0 16px; font-size: 10.5px; letter-spacing: .2em; text-transform: uppercase;
  color: rgba(237,234,227,.42); font-weight: 500;
}
.fcol a { display: block; font-size: 13.5px; color: rgba(237,234,227,.78); padding: 6px 0; transition: color .2s; }
.fcol a:hover { color: #fff; }
.footer-bottom {
  display: flex; align-items: center; gap: 24px; padding-top: 26px;
  font-size: 11.5px; color: rgba(237,234,227,.42); flex-wrap: wrap;
}
.footer-bottom .lang { display: inline-flex; gap: 8px; align-items: center; }
.footer-bottom .lang b { color: rgba(237,234,227,.8); font-weight: 400; }
.footer-bottom .spacer { flex: 1; }

/* ---------- page head ---------- */
.page-head { padding: 76px 0 44px; border-bottom: 1px solid var(--line); }
.page-head .eyebrow { margin-bottom: 22px; }
.page-head .lead { max-width: 60ch; margin-top: 22px; }

/* ---------- filters ---------- */
.filters { display: flex; gap: 10px; flex-wrap: wrap; padding: 26px 0 34px; border-bottom: 1px solid var(--line); margin-bottom: 44px; }
.chip {
  border: 1px solid var(--line-strong); background: transparent; border-radius: 999px;
  padding: 9px 17px; font-size: 12.5px; letter-spacing: .02em; cursor: pointer;
  transition: all .22s var(--ease); color: var(--ink-2);
}
.chip:hover { border-color: var(--ink); }
.chip.is-active { background: var(--ink); border-color: var(--ink); color: #fff; }
.filter-count { margin-left: auto; font-size: 12px; color: var(--muted-2); align-self: center; }

.group-head {
  display: flex; align-items: baseline; gap: 18px; margin: 56px 0 26px;
  padding-bottom: 14px; border-bottom: 1px solid var(--line);
}
.group-head:first-of-type { margin-top: 0; }
.group-head h2 { font-size: 20px; letter-spacing: -.01em; }
.group-head .c { font-size: 11.5px; color: var(--muted-2); letter-spacing: .06em; }
.group-head .intro { margin-left: auto; max-width: 46ch; font-size: 12.5px; color: var(--muted); text-align: right; }

/* ---------- product detail ---------- */
.pdp { display: grid; grid-template-columns: 1.08fr .92fr; gap: 76px; padding: 56px 0 40px; }
.pdp-gallery { position: sticky; top: calc(var(--nav-h) + 24px); align-self: start; }
.pdp-main { aspect-ratio: 1/1; background: var(--paper-warm); display: grid; place-items: center; overflow: hidden; border-radius: var(--radius); }
.pdp-main img, .pdp-main .ph { width: 100%; height: 100%; object-fit: cover; }
.pdp-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 10px; }
.pdp-thumbs button { padding: 0; border: 1px solid transparent; background: var(--paper-warm); aspect-ratio: 1/1; cursor: pointer; overflow: hidden; }
.pdp-thumbs button.is-active { border-color: var(--ink); }
.pdp-info .eyebrow { margin-bottom: 14px; }
.pdp-info h1 { margin-bottom: 12px; }
.pdp-info .tagline { font-size: 17px; color: var(--muted); margin-bottom: 26px; letter-spacing: -.005em; }
.pdp-desc { font-size: 14.5px; color: var(--ink-2); line-height: 1.72; }
.pdp-actions { display: flex; gap: 10px; margin: 30px 0 10px; flex-wrap: wrap; }
.pdp-note { font-size: 12px; color: var(--muted-2); margin-top: 10px; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 12px; }
.spec-table tr { border-top: 1px solid var(--line); }
.spec-table tr:last-child { border-bottom: 1px solid var(--line); }
.spec-table th { text-align: left; font-weight: 400; font-size: 12.5px; color: var(--muted); padding: 12px 0; width: 42%; }
.spec-table td { font-size: 13px; padding: 12px 0; color: var(--ink); }

.feature-list { list-style: none; margin: 0; padding: 0; }
.feature-list li { display: grid; grid-template-columns: 26px 1fr; gap: 12px; padding: 11px 0; font-size: 13.5px; color: var(--ink-2); }
.feature-list .tick { color: var(--accent); font-size: 12px; padding-top: 2px; }

.pdp-block { margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--line); }
.pdp-block h4 { font-size: 10.5px; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; font-weight: 500; }

/* ---------- accordion ---------- */
.acc { border-top: 1px solid var(--line); }
.acc details { border-bottom: 1px solid var(--line); }
.acc summary {
  list-style: none; cursor: pointer; padding: 22px 40px 22px 0; position: relative;
  font-size: 15px; letter-spacing: -.005em;
}
.acc summary::-webkit-details-marker { display: none; }
.acc summary::after {
  content: "+"; position: absolute; right: 4px; top: 20px; font-size: 18px; color: var(--muted);
  transition: transform .3s var(--ease);
}
.acc details[open] summary::after { transform: rotate(45deg); }
.acc .a { padding: 0 60px 24px 0; font-size: 14px; color: var(--muted); line-height: 1.7; }

/* ---------- forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: grid; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.field input, .field select, .field textarea {
  width: 100%; border: 0; border-bottom: 1px solid var(--line-strong); background: transparent;
  padding: 11px 0; font: inherit; font-size: 14.5px; color: var(--ink); border-radius: 0;
  transition: border-color .2s;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--ink); }
.field err { color: #A33; }
.form-msg { margin-top: 18px; font-size: 13.5px; }
.form-msg.ok { color: #1D7A50; }
.form-msg.err { color: #A33; }
/* 蜜罐字段：真实访客看不见，自动填表脚本会填 —— 填了就静默丢弃 */
.hp { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }

/* ---------- misc ---------- */
.divider { height: 1px; background: var(--line); }
.link-arrow { display: inline-flex; align-items: center; gap: 9px; font-size: 13.5px; border-bottom: 1px solid var(--ink); padding-bottom: 3px; }
.link-arrow svg { width: 13px; height: 13px; transition: transform .25s var(--ease); }
.link-arrow:hover svg { transform: translateX(4px); }

.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); }
.contact-cards .cc { background: var(--paper); padding: 28px 26px; }
.contact-cards .cc .k { font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 10px; }
.contact-cards .cc .v { font-size: 15px; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  :root { --gutter: 32px; }
  .split, .editorial { gap: 52px; }
  .grid-products { gap: 34px 20px; }
  .pdp { gap: 48px; }
}
@media (max-width: 960px) {
  .nav, .header-cta { display: none; }
  .burger { display: block; }
  .tiles { grid-template-columns: repeat(2, 1fr); }
  .grid-products { grid-template-columns: repeat(2, 1fr); }
  .split, .editorial, .pdp, .hero-bottom { grid-template-columns: 1fr; gap: 36px; }
  .pdp-gallery { position: static; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 36px; }
  .contact-cards { grid-template-columns: 1fr; }
  .hero-actions { justify-content: flex-start; }
  .section { padding: 68px 0; }
}
@media (max-width: 620px) {
  :root { --gutter: 20px; --nav-h: 66px; }
  .grid-products { grid-template-columns: 1fr; }
  .tiles { gap: 12px; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .page-head { padding: 52px 0 32px; }
  .group-head { flex-wrap: wrap; }
  .group-head .intro { text-align: left; margin-left: 0; }
  .brand .brand-div, .site-header .brand .sub { display: none; }
}

/* cards rendered by JS fade in immediately (no scroll dependency) */
.card-anim { animation: fadeUp .65s var(--ease) both; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}