/* ==========================================================================
   SINOCLEAN — design system
   Industrial spec-sheet aesthetic: hairline rules, wide-tracked micro labels,
   oversized numerals, generous whitespace. No web fonts (Core Web Vitals).
   ========================================================================== */

:root {
  /* Palette --------------------------------------------------------------- */
  --ink:          #0E1614;   /* deep warm near-black */
  --ink-soft:     #1C2A26;
  --ink-muted:    #5A6B66;
  --paper:        #FBFAF8;   /* warm off-white */
  --paper-2:      #F3F1EC;
  --line:         #E2DED5;   /* hairline on paper */
  --line-dark:    #2C3A35;   /* hairline on ink */
  --accent:       #0D6E5F;   /* teal — water / clean, restrained */
  --accent-deep:  #095046;
  --accent-bright:#19C7A9;
  --sand:         #C9A227;   /* warm signal for large numerals/rules only */
  --sand-ink:     #7A5D0A;   /* AA-compliant sand for small text on paper */

  /* Type ------------------------------------------------------------------ */
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Helvetica Neue",
          "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --step--1: clamp(0.80rem, 0.78rem + 0.10vw, 0.86rem);
  --step-0:  clamp(0.98rem, 0.95rem + 0.15vw, 1.06rem);
  --step-1:  clamp(1.16rem, 1.08rem + 0.40vw, 1.38rem);
  --step-2:  clamp(1.42rem, 1.24rem + 0.85vw, 1.95rem);
  --step-3:  clamp(1.80rem, 1.42rem + 1.75vw, 2.85rem);
  --step-4:  clamp(2.20rem, 1.50rem + 3.20vw, 4.20rem);
  --step-5:  clamp(2.60rem, 1.40rem + 5.20vw, 5.60rem);

  /* Space ---------------------------------------------------------------- */
  --gap: clamp(1rem, 0.6rem + 1.6vw, 1.75rem);
  --pad-x: clamp(1.15rem, 0.5rem + 3vw, 3.5rem);
  --section-y: clamp(3.5rem, 2rem + 6vw, 7.5rem);
  --max: 1280px;
  --measure: 68ch;

  --radius: 3px;
  --shadow-1: 0 1px 2px rgba(14, 22, 20, .05), 0 8px 24px -12px rgba(14, 22, 20, .12);
  --shadow-2: 0 2px 4px rgba(14, 22, 20, .07), 0 24px 48px -20px rgba(14, 22, 20, .22);
}

/* Reset -------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
body {
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { line-height: 1.1; font-weight: 600; letter-spacing: -0.022em; text-wrap: balance; }
h1 { font-size: var(--step-4); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-1); letter-spacing: -0.012em; }
p, li { text-wrap: pretty; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--accent-bright); color: var(--ink); }

/* Layout primitives -------------------------------------------------------- */
.wrap { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: var(--pad-x); }
.section { padding-block: var(--section-y); }
.section--tight { padding-block: calc(var(--section-y) * .6); }
.section--ink { background: var(--ink); color: var(--paper); }
.section--paper2 { background: var(--paper-2); }
.section--group { position: relative; isolation: isolate; overflow: hidden; }
.section--group > .wrap { position: relative; z-index: 2; }
.group-video, .group-video__shade { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.group-video { z-index: 0; object-fit: cover; opacity: .48; }
.group-video__shade { z-index: 1; background: rgba(14, 22, 20, .42); }
.group-layout { display: grid; gap: clamp(2rem, 4vw, 5rem); align-items: start; }
.group-copy .lede { max-width: 42ch; margin-top: 1.5rem; }
.group-copy .btn-row { margin-top: 2rem; }
.group-factories { display: grid; gap: 1rem; }
.group-factories .factorycard { padding: 1.2rem 1.4rem; }
.factorycard { isolation: isolate; }
.factorycard__image, .factorycard__shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.factorycard__image { z-index: 0; object-fit: cover; filter: brightness(1.18); }
.factorycard__shade { z-index: 1; background: rgba(14, 22, 20, .34); }
.factorycard__content { position: relative; z-index: 2; }
@media (prefers-reduced-motion: reduce) { .group-video { display: none; } }
@media (min-width: 940px) {
  .group-layout { grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); }
  .group-factories { width: 66.666%; margin-left: auto; }
}
@media (max-width: 939px) { .group-copy .lede { max-width: 65ch; } }
:is(.section--ink,.hero,.phead) h1, :is(.section--ink,.hero,.phead) h2, :is(.section--ink,.hero,.phead) h3 { color: #fff; }
.rule { height: 1px; background: var(--line); border: 0; }
:is(.section--ink,.hero,.phead) .rule { background: var(--line-dark); }
.measure { max-width: var(--measure); }
.stack > * + * { margin-top: var(--gap); }
.center { text-align: center; margin-inline: auto; }

.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1100px) { .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 960px) { .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 760px) { .grid--2 { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 640px) { .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); } }

/* 同一排卡片共享内容行，标题换行时正文和按钮仍保持对齐。 */
.grid--aligned > .card {
  display: grid; grid-template-rows: subgrid; grid-row: span var(--card-rows);
  row-gap: 0; min-width: 0;
}

/* Micro label — "01 / PRODUCTS" ------------------------------------------- */
.label {
  display: flex; align-items: center; gap: .7rem;
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1.1rem;
}
.label::before {
  content: ""; width: clamp(1.5rem, 4vw, 3rem); height: 1px;
  background: var(--sand); flex: none;
}
.label__n { color: var(--sand-ink); font-weight: 600; }
:is(.section--ink,.hero,.phead) .label__n { color: var(--sand); }
:is(.section--ink,.hero,.phead) .label { color: #9DB0AA; }
/* Light cards inside dark sections keep paper-mode text colours. */
:is(.section--ink,.hero,.phead) .card h3 { color: var(--ink); }
:is(.section--ink,.hero,.phead) .card .label, :is(.section--ink,.hero,.phead) .card .muted { color: var(--ink-muted); }

.lede { font-size: var(--step-1); line-height: 1.5; color: var(--ink-soft); max-width: 60ch; }
:is(.section--ink,.hero,.phead) .lede { color: #C7D3CF; }
.muted { color: var(--ink-muted); }
:is(.section--ink,.hero,.phead) .muted { color: #9DB0AA; }

/* Buttons ------------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .8rem 1.4rem;
  font-size: var(--step--1); font-weight: 600;
  letter-spacing: .04em; text-transform: uppercase;
  text-decoration: none; border: 1px solid transparent;
  border-radius: var(--radius); cursor: pointer;
  transition: transform .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-deep); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn--ghost:hover { border-color: var(--ink); }
:is(.section--ink,.hero,.phead) .btn--ghost { border-color: var(--line-dark); color: #fff; }
:is(.section--ink,.hero,.phead) .btn--ghost:hover { border-color: var(--accent-bright); color: var(--accent-bright); }
.btn--bright { background: var(--accent-bright); color: var(--ink); }
.btn--bright:hover { background: #14b195; }
.btn__arrow { transition: transform .18s ease; }
.btn:hover .btn__arrow { transform: translateX(3px); }
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; }

/* Header ------------------------------------------------------------------- */
.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--ink); color: #fff; padding: .75rem 1.25rem;
}
.skip:focus { left: .5rem; top: .5rem; }

.hdr {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 250, 248, .88);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.hdr__in { display: flex; align-items: center; gap: var(--gap); min-height: 76px; }
.brand { display: flex; align-items: center; text-decoration: none; margin-right: auto; }
.brand__mark { width: 108px; height: auto; flex: none; object-fit: contain; }
.brand__txt { display: flex; flex-direction: column; line-height: 1.05; }
.brand__name { font-weight: 700; letter-spacing: .13em; font-size: .96rem; }
.brand__sub {
  font-family: var(--mono); font-size: .58rem; letter-spacing: .17em;
  text-transform: uppercase; color: var(--ink-muted);
}
@media (max-width: 520px) {
  .brand { gap: .65rem; }
  .brand .brand__mark { width: 78px; }
  .brand .brand__name { font-size: .82rem; }
  .brand .brand__sub { font-size: .48rem; letter-spacing: .12em; }
}
.nav { display: flex; align-items: center; gap: clamp(.9rem, 2vw, 1.9rem); }
.nav a {
  text-decoration: none; font-size: var(--step--1); font-weight: 500;
  letter-spacing: .03em; padding-block: .4rem; position: relative; white-space: nowrap;
}
.nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px;
  background: var(--accent); transition: right .22s ease;
}
.nav a:hover::after, .nav a[aria-current="page"]::after { right: 0; }
.nav__dropdown { position: relative; }
.nav__dropdown summary { list-style: none; cursor: pointer; text-decoration: none; font-size: var(--step--1); font-weight: 500; letter-spacing: .03em; padding-block: .4rem; white-space: nowrap; }
.nav__dropdown summary::-webkit-details-marker { display: none; }
.nav__dropdown summary::after { content: "⌄"; display: inline-block; margin-left: .35rem; font-size: .8em; transition: transform .2s ease; }
.nav__dropdown[open] summary::after { transform: rotate(180deg); }
.nav__dropdown summary[aria-current="page"] { color: var(--accent); }
.nav__menu { position: absolute; top: calc(100% + .8rem); left: 50%; transform: translateX(-50%); z-index: 20; display: grid; grid-template-columns: repeat(4, minmax(10rem, 1fr)); gap: 1.25rem; width: min(72vw, 62rem); max-height: min(70vh, 34rem); overflow: auto; padding: 1.35rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: var(--shadow-2); }
.nav__menu-all { grid-column: 1 / -1; padding-bottom: .8rem; border-bottom: 1px solid var(--line); color: var(--accent); font-weight: 600; }
.nav__group { display: grid; align-content: start; gap: .15rem; }
.nav__group-title { margin-bottom: .45rem; color: var(--ink); font-weight: 600; }
.nav__menu .nav__group a { padding-block: .28rem; border: 0; font-size: .78rem; white-space: normal; }
.nav__menu .nav__group a::after, .nav__menu-all::after { display: none; }
.nav__menu .nav__group a:hover { color: var(--accent); }
.hdr .btn { padding: .6rem 1.05rem; }
.nav__cta { display: none; }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--line);
  border-radius: var(--radius); padding: .5rem .6rem; cursor: pointer;
}
@media (max-width: 1040px) {
  .nav-toggle { display: block; }
  .hdr__cta { display: none; }
  .nav {
    position: fixed; inset: 68px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: .5rem var(--pad-x) 1.5rem;
    max-height: calc(100dvh - 68px); overflow-y: auto;
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    visibility: hidden;
    transition: opacity .18s ease, transform .18s ease, visibility .18s;
  }
  .nav[data-open="true"] { transform: none; opacity: 1; pointer-events: auto; visibility: visible; }
  .nav a { padding-block: .95rem; border-bottom: 1px solid var(--line); font-size: 1.05rem; }
  .nav a::after { display: none; }
  .nav__dropdown { border-bottom: 1px solid var(--line); }
  .nav__dropdown summary { display: block; padding-block: .95rem; font-size: 1.05rem; }
  .nav__menu { position: static; transform: none; display: block; width: auto; max-height: none; overflow: visible; padding: .25rem 0 .75rem 1rem; border: 0; border-radius: 0; box-shadow: none; background: transparent; }
  .nav__menu-all { display: block; padding-block: .45rem .75rem; border-bottom: 1px solid var(--line); }
  .nav__group { display: block; padding-block: .55rem; }
  .nav__group-title { display: block; margin-bottom: .25rem; color: var(--accent); }
  .nav__menu .nav__group a { display: block; padding-block: .35rem; font-size: .92rem; }
  .nav__cta { display: flex; }
  .nav .btn { margin-top: 1rem; justify-content: center; }
}

/* Hero --------------------------------------------------------------------- */
.hero {
  position: relative; overflow: hidden;
  background: #173d31; color: #fff9ee;
}
.hero__stage { position: relative; isolation: isolate; }
.hero__media { position: absolute; inset: 0; }
.hero__photo { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: right center; opacity: 0; transition: opacity .6s ease; }
.hero__photo.is-active { opacity: 1; }
.hero__photo--car { object-position: center; }
.hero__photo--natural { object-position: center; }
.hero__controls { position: absolute; right: clamp(.75rem, 2vw, 2rem); bottom: 1.5rem; z-index: 3; display: flex; align-items: center; gap: .3rem; padding: .4rem; border: 1px solid #bfd5c4; border-radius: 999px; background: #173d31; color: #fff9ee; }
.hero__controls[hidden] { display: none; }
.hero__controls button { display: grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 0; border-radius: 50%; background: transparent; color: inherit; cursor: pointer; }
.hero__controls button:hover { background: #bee2c9; color: #153e2e; }
.hero__controls [data-hero-previous] svg { transform: rotate(180deg); }
.hero__counter { min-width: 3.5rem; text-align: center; font: .75rem var(--mono); }
/* Darken only the copy area; leave the product display on the right clear. */
.hero__stage::after {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(90deg, rgba(13, 37, 28, .97) 0%, rgba(13, 37, 28, .93) 26%, rgba(13, 37, 28, .83) 40%, rgba(13, 37, 28, .65) 48%, rgba(13, 37, 28, .25) 54%, transparent 59%);
}
.hero__in { position: relative; z-index: 2; display: flex; align-items: center; min-height: clamp(42rem, 56.25vw, 64rem); padding-block: clamp(3rem, 5vw, 5rem); pointer-events: none; }
.hero__copy { pointer-events: auto; }
.hero__copy { width: 48%; max-width: 36rem; }
.hero h1 { font-size: clamp(2.7rem, 4vw, 4rem); line-height: 1.08; letter-spacing: -.035em; color: #fff9ee; text-shadow: 0 2px 12px rgba(0, 0, 0, .16); }
.hero h1 em { font-style: normal; color: #bee2c9; }
.hero__lede { margin-top: 1.5rem; font-size: clamp(1rem, 1.25vw, 1.15rem); line-height: 1.65; color: #f1eee5; max-width: 52ch; }
.hero .btn-row { margin-top: 2rem; }
.hero .label { flex-wrap: wrap; gap: .5rem .7rem; font-size: .66rem; line-height: 1.7; color: #e4ebdc; }
.hero .label::before { background: #c8d8a9; }
.hero .label__n { white-space: nowrap; color: #cee6b6; }
.hero .btn--bright { background: #bee2c9; color: #153e2e; }
.hero .btn--bright:hover { background: #d4efd9; }
.hero .btn--ghost { color: #fff9ee; border-color: #b8cab8; background: rgba(13, 37, 28, .3); }
.hero .btn--ghost:hover { color: #153e2e; background: #fff9ee; border-color: #fff9ee; }
.hero .strip { margin-top: 0; }
.hero .strip__i { padding-block: 1.5rem; border-top: 0; }
.hero .strip__k, .hero .strip__v small { color: #c5d6c9; }
.hero .strip__v { color: #fff9ee; }
@media (max-width: 900px) {
  .hero__media { position: relative; aspect-ratio: 16 / 9; }
  .hero__photo--natural { object-fit: contain; background: #173d31; }
  .hero__stage::after { display: none; }
  .hero__in { min-height: 0; padding-block: 2.5rem; }
  .hero__copy { width: 100%; max-width: none; }
  .hero h1 { max-width: 22ch; }
  .hero__lede { max-width: 65ch; }
  .hero .strip { border-top: 1px solid #436151; }
}
@media (max-width: 640px) {
  .hero__media { aspect-ratio: 4 / 3; }
  .hero__controls { bottom: .75rem; padding: .15rem; }
  .hero h1 { font-size: clamp(2.25rem, 8.5vw, 3rem); }
  .hero .label { display: grid; grid-template-columns: auto 1fr; }
  .hero__label-text { grid-column: 2; }
  .hero .btn-row { flex-direction: column; }
  .hero .btn { justify-content: center; }
}

/* Spec strip (hero footer facts) ------------------------------------------- */
.strip {
  position: relative; z-index: 1;
  margin-top: clamp(2.5rem, 2rem + 4vw, 5rem);
  display: grid; grid-template-columns: repeat(6, minmax(0, 1fr));
  column-gap: var(--gap);
}
.strip__i { padding-block: 1.4rem 1.5rem; border-top: 1px solid var(--line-dark); }
.strip__k {
  font-family: var(--mono); font-size: .62rem; letter-spacing: .16em;
  text-transform: uppercase; color: #8FA39D; margin-bottom: .45rem;
}
.strip__v { font-size: var(--step-1); font-weight: 600; color: #fff; letter-spacing: -0.02em; }
.strip__v small { display: block; margin-top: .35rem; font-size: .62em; font-weight: 500; color: #9DB0AA; letter-spacing: 0; }
@media (max-width: 1100px) { .strip { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 640px) {
  .strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .strip__i { padding-block: 1.05rem; }
}

/* Page header (interior pages) --------------------------------------------- */
.phead { background: var(--ink); color: var(--paper); padding-block: clamp(2.75rem, 2rem + 5vw, 5.5rem) clamp(2.25rem, 1.5rem + 4vw, 4.5rem); position: relative; overflow: hidden; }
.phead::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(55% 80% at 88% 0%, rgba(25, 199, 169, .13), transparent 60%);
}
.phead__in { position: relative; z-index: 1; }
.phead h1 { max-width: 26ch; }
.phead .lede { margin-top: 1.15rem; }

/* Breadcrumbs -------------------------------------------------------------- */
.crumbs {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .1em;
  text-transform: uppercase; color: #8FA39D; margin-bottom: 1.25rem;
}
.crumbs ol { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.crumbs li + li::before { content: "/"; margin-right: .5rem; color: var(--line-dark); }
.crumbs a { text-decoration: none; color: inherit; }
.crumbs a:hover { color: var(--accent-bright); }

/* Cards -------------------------------------------------------------------- */
.card {
  display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1.35rem, 1rem + 1.2vw, 2rem);
  text-decoration: none; position: relative; overflow: hidden;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card::after {
  content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 2px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform .28s ease;
}
a.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); border-color: transparent; }
a.card:hover::after { transform: scaleX(1); }
.card__ico { color: var(--accent); margin-bottom: 1.1rem; }
.card__n {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .14em;
  color: var(--sand-ink); margin-bottom: .8rem;
}
.card h3 { margin-bottom: .55rem; }
.card p { color: var(--ink-muted); font-size: var(--step--1); line-height: 1.6; }
.product-category-title { margin-bottom: .75rem; font-size: var(--step-3); font-weight: 700; line-height: 1.08; }
.card__more {
  margin-top: auto; padding-top: 1.15rem;
  font-family: var(--mono); font-size: .68rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent); font-weight: 600;
  display: flex; align-items: center; gap: .4rem;
}
a.card:hover .card__more .btn__arrow { transform: translateX(3px); }
.card__tags { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: 1rem; }
.tag {
  font-family: var(--mono); font-size: .62rem; letter-spacing: .06em;
  padding: .22rem .5rem; border: 1px solid var(--line);
  border-radius: 2px; color: var(--ink-muted);
}

/* Homepage category panels ------------------------------------------------ */
.catcards {
  position: relative; isolation: isolate; overflow: hidden;
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(.75rem, 1.6vw, 1.5rem); padding: clamp(.75rem, 1.2vw, 1.1rem);
  border: 1px solid #fff; border-radius: 2rem; background: rgba(255, 255, 255, .7);
}
.catcard {
  position: relative; z-index: 1; isolation: isolate; display: grid; place-items: center; min-width: 0;
  aspect-ratio: .53; padding: 1rem; overflow: hidden;
  border: 1px solid rgba(14, 22, 20, .04); border-radius: 1.35rem;
  background: linear-gradient(125deg, #F3F4F0, #FCFCFA);
  box-shadow: 4px 5px 8px rgba(14, 22, 20, .22);
  text-align: center; text-decoration: none;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.catcard__image, .catcard__shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.catcard__image { z-index: 0; object-fit: cover; }
.catcard__shade { z-index: 1; background: linear-gradient(180deg, rgba(14, 22, 20, .08), rgba(14, 22, 20, .62)); }
.catcard:hover { border-color: var(--accent); box-shadow: 4px 7px 14px rgba(14, 22, 20, .24); }
.catcard__title { position: relative; z-index: 2; }
.catcard h3 { font-size: clamp(1.1rem, .7rem + 1vw, 1.6rem); line-height: 1.2; letter-spacing: -0.02em; }
.catcard .catcard__zh { display: block; margin: .75rem 0 0; }
.catcard--image h3, .catcard--image .catcard__zh { color: #fff; text-shadow: 0 1px 4px rgba(14, 22, 20, .45); }
@media (max-width: 700px) { .catcards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.catcard__zh { font-size: var(--step--1); color: var(--ink-muted); font-family: var(--sans); margin-left: .5rem; font-weight: 400; }
.factorycard { background: var(--ink-soft); border-color: var(--line-dark); }
.factorycard .card__n { color: var(--sand); }
.section--ink .factorycard h3 { font-size: var(--step-0); color: #fff; }
.factorycard p { color: #E0ECE5; }

/* Spec table --------------------------------------------------------------- */
.spec { width: 100%; border-collapse: collapse; font-size: var(--step--1); }
.spec caption {
  text-align: left; font-family: var(--mono); font-size: .68rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink-muted);
  padding-bottom: .85rem;
}
.spec th, .spec td { text-align: left; padding: .8rem 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec th {
  font-weight: 500; color: var(--ink-muted); width: 38%;
  font-family: var(--mono); font-size: .72rem; letter-spacing: .05em;
  text-transform: uppercase; padding-right: 1rem;
}
.spec td { font-weight: 500; }
.spec tr:last-child th, .spec tr:last-child td { border-bottom: 0; }
:is(.section--ink,.hero,.phead) :is(.spec caption, .spec th) { color: #9DB0AA; }
:is(.section--ink,.hero,.phead) :is(.spec th, .spec td) { border-color: var(--line-dark); }

/* Feature / check lists ---------------------------------------------------- */
.checks { list-style: none; padding: 0; display: grid; gap: .85rem; }
.checks li { display: flex; gap: .75rem; align-items: flex-start; font-size: var(--step--1); line-height: 1.6; }
.checks li::before {
  content: ""; flex: none; width: 1.05rem; height: 1.05rem; margin-top: .28rem;
  border-radius: 50%; background: var(--accent);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M20 6L9 17l-5-5' fill='none' stroke='%23000' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 100% no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M20 6L9 17l-5-5' fill='none' stroke='%23000' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 100% no-repeat;
}
:is(.section--ink,.hero,.phead) .checks li::before { background: var(--accent-bright); }
.pills { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.pills li {
  font-size: var(--step--1); padding: .4rem .8rem;
  border: 1px solid var(--line); border-radius: 100px; color: var(--ink-soft);
}
:is(.section--ink,.hero,.phead) .pills li { border-color: var(--line-dark); color: #C7D3CF; }

/* Numbered process steps --------------------------------------------------- */
.steps { list-style: none; padding: 0; counter-reset: s; display: grid; gap: 0; }
.steps li {
  counter-increment: s; display: grid;
  grid-template-columns: clamp(3.5rem, 8vw, 6rem) 1fr;
  gap: var(--gap); padding-block: clamp(1.4rem, 1rem + 1.5vw, 2.25rem);
  border-top: 1px solid var(--line);
}
.steps li:last-child { border-bottom: 1px solid var(--line); }
.steps li::before {
  content: "0" counter(s);
  font-family: var(--mono); font-size: var(--step-2); font-weight: 600;
  color: var(--sand); line-height: 1; letter-spacing: -0.03em;
}
.steps h3 { margin-bottom: .4rem; }
.steps p { color: var(--ink-muted); max-width: var(--measure); }
.steps + .stack { margin-top: 2rem; }
:is(.section--ink,.hero,.phead) .steps li { border-color: var(--line-dark); }
:is(.section--ink,.hero,.phead) .steps p { color: #9DB0AA; }

/* Split layout (media/aside + body) ---------------------------------------- */
.split { display: grid; gap: clamp(2rem, 1rem + 4vw, 4.5rem); align-items: start; }
.split--heading { margin-bottom: 2.5rem; }
.split--heading, .cta .split { gap: var(--gap); }
@media (min-width: 940px) {
  .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); }
  .split--heading, .cta .split { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split--aside-right { grid-template-columns: minmax(0, 1.2fr) minmax(0, 20rem); }
  .split__sticky { position: sticky; top: 96px; }
}

/* Accordion FAQ ------------------------------------------------------------ */
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; padding: 1.25rem 2.5rem 1.25rem 0;
  font-weight: 600; font-size: var(--step-1); letter-spacing: -0.012em;
  position: relative; display: block;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: .35rem; top: 1.75rem;
  width: .8rem; height: .8rem; border-right: 1.5px solid var(--accent);
  border-bottom: 1.5px solid var(--accent); transform: rotate(45deg);
  transition: transform .22s ease;
}
.faq details[open] summary::after { transform: rotate(-135deg); top: 1.9rem; }
.faq summary:hover { color: var(--accent); }
.faq__a { padding: 0 clamp(0rem, 3vw, 3rem) 1.5rem 0; color: var(--ink-soft); max-width: var(--measure); }

/* Answer box — the paragraph AI engines quote -------------------------------- */
.answer {
  border-left: 3px solid var(--accent);
  background: var(--paper-2);
  padding: clamp(1.15rem, 1rem + 1vw, 1.75rem);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.answer__k {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .15em;
  text-transform: uppercase; color: var(--accent); font-weight: 600; margin-bottom: .6rem;
}
.answer p { font-size: var(--step-0); color: var(--ink-soft); max-width: var(--measure); }

/* Prose (articles) --------------------------------------------------------- */
.prose { max-width: var(--measure); }
.prose > * + * { margin-top: 1.35rem; }
.prose h2 {
  font-size: var(--step-2); margin-top: 2.75rem; padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.prose h3 { margin-top: 2rem; }
.prose ul, .prose ol { padding-left: 1.35rem; }
.prose li + li { margin-top: .55rem; }
.prose strong { font-weight: 650; }
.prose em { color: var(--ink-soft); }
.prose a { color: var(--accent); font-weight: 500; }

/* Article meta ------------------------------------------------------------- */
.ameta {
  display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; align-items: center;
  font-family: var(--mono); font-size: .68rem; letter-spacing: .1em;
  text-transform: uppercase; color: #8FA39D;
}

/* Contact form ------------------------------------------------------------- */
.form { display: grid; gap: 1.1rem; }
.field { display: grid; gap: .45rem; }
.field label {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-muted); font-weight: 500;
}
.field label .req { color: var(--accent); }
.field input, .field select, .field textarea {
  width: 100%; padding: .8rem .9rem; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius);
  transition: border-color .18s ease, box-shadow .18s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 110, 95, .12);
}
.field textarea { min-height: 8.5rem; resize: vertical; }
.field__hint { font-size: .78rem; color: var(--ink-muted); }
.form__row { display: grid; gap: 1.1rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); }
.checkgrid { display: grid; gap: .6rem; grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr)); }
.checkgrid label {
  display: flex; align-items: center; gap: .55rem; cursor: pointer;
  font-family: var(--sans); font-size: var(--step--1); letter-spacing: 0;
  text-transform: none; color: var(--ink); padding: .7rem .85rem;
  border: 1px solid var(--line); border-radius: var(--radius); background: #fff;
  transition: border-color .18s ease;
}
.checkgrid label:hover { border-color: var(--accent); }
.checkgrid input { accent-color: var(--accent); width: 1.05rem; height: 1.05rem; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Contact detail rows ------------------------------------------------------ */
.dl { display: grid; gap: 0; }
.dl__row { display: grid; grid-template-columns: 7.5rem 1fr; gap: 1rem; padding-block: .95rem; border-bottom: 1px solid var(--line); }
.dl__row:first-child { border-top: 1px solid var(--line); }
.dl__k {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-muted); padding-top: .15rem;
}
.dl__v { font-weight: 500; overflow-wrap: anywhere; }
.dl__v a { color: var(--accent); text-decoration: none; }
.dl__v a:hover { text-decoration: underline; }
:is(.section--ink,.hero,.phead) .dl__row { border-color: var(--line-dark); }
:is(.section--ink,.hero,.phead) .dl__k { color: #8FA39D; }
:is(.section--ink,.hero,.phead) .dl__v a { color: var(--accent-bright); }
@media (max-width: 520px) { .dl__row { grid-template-columns: 1fr; gap: .25rem; } }

/* CTA band ----------------------------------------------------------------- */
.cta { position: relative; overflow: hidden; }
.cta::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(50% 100% at 20% 100%, rgba(25, 199, 169, .18), transparent 65%);
}
.cta__in { position: relative; z-index: 1; }
.cta h2 { font-size: var(--step-3); max-width: 24ch; }

/* Footer ------------------------------------------------------------------- */
.ftr { background: var(--ink); color: #9DB0AA; padding-block: clamp(2.75rem, 2rem + 4vw, 4.5rem) 2rem; }
.ftr__grid {
  display: grid; gap: var(--gap);
  grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr));
  padding-bottom: 2.5rem;
}
.ftr__grid > div { min-width: 0; }
@media (max-width: 1100px) {
  .ftr__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 2rem; }
  .ftr__grid > div:first-child { grid-column: 1 / -1; }
}
@media (max-width: 640px) { .ftr__grid { grid-template-columns: minmax(0, 1fr); } }
.ftr h2, .ftr h3 {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .15em;
  text-transform: uppercase; color: #fff; font-weight: 600; margin-bottom: 1.1rem;
}
.ftr ul { list-style: none; padding: 0; display: grid; gap: .6rem; }
.ftr a { text-decoration: none; font-size: var(--step--1); }
.ftr a:hover { color: var(--accent-bright); }
.ftr__bar {
  border-top: 1px solid var(--line-dark); padding-top: 1.75rem;
  display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; justify-content: space-between;
  font-size: .78rem;
}
.ftr__brand { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem; margin-bottom: 1rem; text-decoration: none; }
.ftr__brand .brand__name { color: #fff; }
.ftr__brand .brand__sub { color: #9DB0AA; }
.ftr p { font-size: var(--step--1); max-width: 40ch; }

/* Persistent contact shortcuts -------------------------------------------- */
.contact-rail { position: fixed; top: 92px; right: 14px; z-index: 45; display: grid; gap: 10px; }
.contact-rail__link { position: relative; display: grid; place-items: center; width: 52px; height: 52px; border: 1px solid #b8d7c2; border-radius: 50%; background: #173d31; color: #fff9ee; box-shadow: 0 3px 10px #0e16142e; text-decoration: none; transition: background-color .2s ease, color .2s ease; }
.contact-rail__link--whatsapp { background: #286b4d; }
.contact-rail__link:hover, .contact-rail__link:focus-visible { background: #bee2c9; color: #153e2e; }
.contact-rail__label { position: absolute; right: calc(100% + 10px); padding: .6rem .8rem; border: 1px solid #b8d7c2; border-radius: 5px; background: #173d31; color: #fff9ee; font-size: .78rem; line-height: 1.4; white-space: nowrap; opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .15s ease; }
.contact-rail__link:hover .contact-rail__label, .contact-rail__link:focus-visible .contact-rail__label { opacity: 1; visibility: visible; }
@media (max-width: 1100px) {
  main .wrap, .ftr .wrap { padding-right: max(var(--pad-x), 4rem); }
  .contact-rail { right: 8px; gap: 8px; }
  .contact-rail__link { width: 44px; height: 44px; }
  .contact-rail__link svg { width: 22px; height: 22px; }
}

/* Sticky mobile contact bar ------------------------------------------------ */
.dock {
  position: fixed; inset: auto 0 0 0; z-index: 40; display: none;
  gap: 1px; background: var(--line);
  border-top: 1px solid var(--line);
}
.dock a {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: .45rem;
  padding: .95rem .5rem; background: #fff; text-decoration: none;
  font-size: .8rem; font-weight: 600; letter-spacing: .03em;
}
.dock a:first-child { background: var(--accent); color: #fff; }
@media (max-width: 880px) {
  .dock { display: flex; padding-bottom: env(safe-area-inset-bottom, 0px); }
  body { padding-bottom: calc(3.6rem + env(safe-area-inset-bottom, 0px)); }
}

/* Product imagery ---------------------------------------------------------- */
.series-card .card__shot img, .sku-card .card__shot img { aspect-ratio: 4 / 3; object-fit: contain; }
.series-card__points { padding-left: 1.1rem; margin-top: 1rem; font-size: var(--step--1); color: var(--ink-muted); }
.series-card__points li + li { margin-top: .45rem; }
.product-guide-copy > h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.product-guide-photo img { aspect-ratio: 4 / 3; max-height: 24rem; }
#product-guides, #guide-products { scroll-margin-top: 5rem; }
.catalog-toolbar { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1.5rem; }
.catalog-toolbar .field { flex: 1 1 18rem; max-width: 32rem; }
.catalog-items [hidden] { display: none; }
.sku-card { scroll-margin-top: 6rem; }
.sku-card h3 { min-height: 2.4em; line-height: 1.2; }
.sku-card__specs { margin-block: .75rem 1.25rem; font-size: var(--step--1); }
.sku-card__specs > div { display: grid; grid-template-columns: 5.4rem minmax(0, 1fr); gap: .75rem; padding-block: .5rem; border-top: 1px solid var(--line); }
.sku-card__specs dt { color: var(--ink-muted); }
.sku-card__specs dd { overflow-wrap: anywhere; }
.sku-card__note { margin-block: .75rem; }
.sku-card .btn { justify-content: center; margin-top: auto; }
.sku-design { display: flex; justify-content: center; align-items: center; gap: .5rem; margin-top: .75rem; color: var(--accent); font-size: .8rem; }
.design-enquiry-files { display: grid; gap: .75rem; margin-top: 1rem; }
.design-enquiry-files .btn { overflow-wrap: anywhere; min-width: 0; }
#catalogue { scroll-margin-top: 5rem; }
/* 目录册抠图本身是白底，所以图框给一层极浅的纸色，避免图和页面白底糊在一起。 */
.shots {
  display: grid; gap: clamp(.9rem, .6rem + .8vw, 1.4rem);
  grid-template-columns: repeat(auto-fill, minmax(178px, 1fr));
}
.shot {
  margin: 0; background: var(--paper-2);
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden;
}
.shot img {
  width: 100%; aspect-ratio: 1; object-fit: contain;
  background: #fff; padding: .6rem;
}
.shot figcaption {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .1em;
  color: var(--ink-muted); padding: .55rem .7rem .6rem; text-transform: uppercase;
}
/* 卡片缩略图 —— 与 .card__ico 二选一，不并存 */
.card__shot {
  margin: -.35rem -.35rem 1.05rem; border-radius: var(--radius);
  overflow: hidden; background: #fff; border: 1px solid var(--line);
}
.card__shot img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; padding: .45rem; }

/* 品牌标识区 —— 用于展示本公司自有零售品牌（SPIFFY）*/
.brand-strip {
  display: flex; align-items: center; flex-wrap: wrap; gap: 1.6rem 2.4rem;
  padding: clamp(1.4rem, 1rem + 1.2vw, 2.2rem) clamp(1.4rem, 1rem + 1.2vw, 2.4rem);
  background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius);
}
.brand-strip__logo { flex: 0 0 auto; max-height: 84px; width: auto; }
.brand-strip__txt { flex: 1 1 22rem; min-width: 0; }
.brand-strip__k {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--sand-ink); margin-bottom: .35rem;
}
.brand-strip__txt h2 { margin: 0 0 .4rem; font-size: var(--step-0); letter-spacing: -.01em; }
.brand-strip__txt p { margin: 0; color: var(--ink-muted); font-size: var(--step--1); max-width: 62ch; }

/* Utilities ---------------------------------------------------------------- */
.hide { display: none !important; }
@media print {
  .hdr, .dock, .cta, .ftr__grid, .contact-rail { display: none; }
  body { background: #fff; }
}