/* ============================================================
   SINONAVO — design system
   White ground · deep marine blue · cobalt for actions only
   ============================================================ */

@font-face {
  font-family: 'Archivo';
  src: url('../fonts/Archivo.woff2') format('woff2');
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Manrope';
  src: url('../fonts/Manrope.woff2') format('woff2');
  font-weight: 400 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --bg-deep: #0f2b45;
  --bg-deeper: #0a1f33;

  --ink: #142b3f;
  --ink-2: #5c6b7a;
  --ink-3: #8996a4;
  --on-deep: #ffffff;
  --on-deep-2: rgba(255, 255, 255, 0.68);

  --brand: #184bd6;
  --brand-hover: #123aa8;
  --brand-soft: #eef2fd;

  --line: #e4e9f0;
  --line-2: #d2dae5;
  --line-deep: rgba(255, 255, 255, 0.16);

  --font-display: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Manrope', 'Helvetica Neue', Arial, sans-serif;

  --container: 1200px;
  --gutter: clamp(20px, 3.2vw, 40px);
  --header-h: 68px;
  --radius: 4px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* clip 不创建滚动容器，sticky 与 scroll 事件保持正常 */
  overflow-x: clip;
}

body.is-locked { overflow: hidden; }

[id] { scroll-margin-top: calc(var(--header-h) + 20px); }

::selection {
  background: var(--brand);
  color: #fff;
}

img, svg { display: block; max-width: 100%; }

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

button { font: inherit; color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.12;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; }

ul, ol, dl, dd { margin: 0; padding: 0; }

li { list-style: none; }

figure { margin: 0; }

address { font-style: normal; }

hr { border: 0; border-top: 1px solid var(--line); margin: 0; }

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
}

/* ---------- layout ---------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section { padding: clamp(56px, 7vw, 96px) 0; }

.section--soft { background: var(--bg-soft); }

.section--deep {
  background: var(--bg-deep);
  color: var(--on-deep);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: clamp(28px, 3.4vw, 44px);
}

.section-head__title {
  font-size: clamp(24px, 2.6vw, 34px);
  font-weight: 700;
}

.section-head__note {
  font-size: 14.5px;
  color: var(--ink-2);
  margin-top: 8px;
  max-width: 46ch;
}

.section--deep .section-head__note { color: var(--on-deep-2); }

.section-head__link {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  padding-bottom: 3px;
}

.section-head__link:hover { color: var(--brand-hover); }

.section-head__link svg { width: 14px; height: 14px; }

/* ---------- eyebrow ---------- */

.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 14px;
}

.eyebrow--light { color: rgba(255, 255, 255, 0.55); }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 24px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease),
    color 0.2s var(--ease);
}

.btn svg { width: 14px; height: 14px; }

.btn:hover { border-color: var(--ink); }

.btn--primary,
.btn--solid {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.btn--primary:hover,
.btn--solid:hover {
  background: var(--brand-hover);
  border-color: var(--brand-hover);
}

.btn--light {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.42);
  color: #fff;
}

.btn--light:hover {
  background: #fff;
  border-color: #fff;
  color: var(--ink);
}

.btn--sm { padding: 10px 18px; font-size: 13.5px; }

.btn--block { width: 100%; }

.btn--lg { padding: 16px 30px; font-size: 15px; }

.link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--brand);
  transition: color 0.2s var(--ease);
}

.link svg { width: 13px; height: 13px; }

.link:hover { color: var(--brand-hover); }

.link--quiet { color: var(--ink-2); }

.link--quiet:hover { color: var(--ink); }

.link--onDeep { color: #fff; }

.link--onDeep:hover { color: rgba(255, 255, 255, 0.72); }

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex-shrink: 0;
}

.brand__mark {
  width: 30px;
  height: 30px;
  color: var(--ink);
}

.brand__type strong {
  display: block;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--ink);
}

.brand__type strong em {
  font-style: normal;
  color: var(--brand);
}

.brand__type span {
  display: block;
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  margin-top: 4px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
}

.nav__link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.nav__link:hover { border-bottom-color: var(--ink); }

.nav__link svg { width: 10px; height: 10px; opacity: 0.6; }

.nav__link.is-current { border-bottom-color: var(--ink); }

.nav__dropdown { position: relative; }

.nav__menu {
  position: absolute;
  top: calc(100% + 14px);
  left: -18px;
  min-width: 232px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(20, 43, 63, 0.09);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease),
    visibility 0.18s;
}

.nav__dropdown:hover .nav__menu,
.nav__dropdown:focus-within .nav__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  font-size: 14px;
  border-radius: 3px;
  color: var(--ink);
  transition: background 0.15s var(--ease);
}

.nav__menu a:hover { background: var(--bg-soft); }

.nav__menu a span {
  font-size: 11.5px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  letter-spacing: 0.04em;
}

.lang-switch svg { width: 9px; height: 9px; opacity: 0.55; }

.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.menu-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.menu-toggle[aria-expanded='true'] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.menu-toggle[aria-expanded='true'] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded='true'] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* mobile nav */

.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: 88;
  background: #fff;
  padding: 28px var(--gutter) 40px;
  display: none;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
}

.mobile-nav.is-open { display: flex; }

.mobile-nav__links { display: flex; flex-direction: column; }

.mobile-nav__links a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.mobile-nav__links a span {
  font-family: var(--font-body);
  font-size: 11px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.mobile-nav__foot {
  margin-top: 32px;
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.7;
}

.mobile-nav__foot a { color: var(--brand); }

/* ---------- hero ---------- */

.hero {
  padding: clamp(44px, 6vw, 76px) 0 clamp(36px, 4vw, 56px);
  background: #fff;
}

.hero__head {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.hero__title {
  font-size: clamp(36px, 5.4vw, 62px);
  font-weight: 800;
  letter-spacing: -0.032em;
  line-height: 1.04;
}

.hero__lead {
  font-size: clamp(16px, 1.5vw, 19px);
  color: var(--ink-2);
  margin: 16px auto 0;
  max-width: 64ch;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.hero__audience {
  margin-top: 20px;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.03em;
}

/* ---------- hero photo slider ---------- */

.hero-slider {
  margin-top: clamp(30px, 4vw, 52px);
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
}

.hero-slider__viewport { overflow: hidden; }

.hero-slider__track {
  display: flex;
  transform: translate3d(calc(-100% * var(--slide, 0)), 0, 0);
  transition: transform 0.9s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: transform;
}

.hero-slider__track.is-jumping { transition: none; }

.hero-slider__slide {
  flex: 0 0 100%;
  margin: 0;
}

.hero-slider__slide img {
  display: block;
  width: 100%;
  height: clamp(240px, 33vw, 470px);
  object-fit: cover;
  object-position: 50% 50%;
}

.hero-slider__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  margin: 0;
  background: rgba(255, 255, 255, 0.94);
  padding: 10px 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ink);
  border-radius: 0 var(--radius) 0 0;
  transition: opacity 0.3s var(--ease);
}

.hero-slider__caption span { color: var(--ink-3); font-weight: 500; }

.hero-slider__caption.is-swapping { opacity: 0; }

.hero-slider__dots {
  position: absolute;
  right: 14px;
  bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 9px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
}

.hero-slider__dot {
  position: relative;
  width: 20px;
  height: 18px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  transition: width 0.3s var(--ease);
}

.hero-slider__dot::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 3px;
  margin-top: -1.5px;
  border-radius: 2px;
  background: rgba(20, 43, 63, 0.28);
  transition: background 0.3s var(--ease);
}

.hero-slider__dot:hover::before { background: rgba(20, 43, 63, 0.52); }

.hero-slider__dot.is-active { width: 34px; }

.hero-slider__dot.is-active::before { background: var(--brand); }

/* ---------- series / product categories ---------- */

/* ---------- range rail ---------- */

.range__aside {
  display: flex;
  align-items: center;
  gap: 18px;
  padding-bottom: 3px;
}

.range__aside .section-head__link { padding-bottom: 0; }

.range__nav { display: flex; gap: 6px; }

.range__btn {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.range__btn svg { width: 14px; height: 14px; }

.range__btn:hover { border-color: var(--brand); color: var(--brand); }

.range__btn[disabled] {
  opacity: 0.35;
  cursor: default;
  border-color: var(--line);
  color: var(--ink-3);
}

.range__viewport {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  padding-left: calc(50vw - 50%);
  padding-right: calc(50vw - 50%);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.range__viewport::-webkit-scrollbar { display: none; }

.range__viewport:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 4px;
}

.range__track {
  display: flex;
  gap: clamp(14px, 1.7vw, 24px);
  width: max-content;
}

.range-card {
  flex: 0 0 clamp(226px, 24vw, 310px);
  display: flex;
  flex-direction: column;
}

.range-card__media {
  display: block;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
  box-shadow: inset 0 0 0 1px var(--line);
}

.range-card__media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
  filter: saturate(0.96) contrast(1.01);
  transition: transform 0.7s var(--ease), filter 0.4s var(--ease);
}

.range-card:hover .range-card__media img {
  transform: scale(1.03);
  filter: saturate(1) contrast(1.01);
}

.range-card__eyebrow {
  margin-top: 15px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.range-card__name {
  margin-top: 5px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--ink);
  transition: color 0.25s var(--ease);
}

.range-card:hover .range-card__name { color: var(--brand); }

.range-card__meta {
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-2);
}

.series-foot {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: clamp(28px, 3vw, 38px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-2);
}

.series-foot a {
  font-weight: 600;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.series-foot a svg { width: 13px; height: 13px; }

.series-foot span { color: var(--ink-3); }

/* ---------- model list ---------- */

.model-list { border-top: 1px solid var(--line-2); }

.model-row {
  display: grid;
  grid-template-columns: minmax(140px, 1.1fr) minmax(200px, 2.4fr) auto;
  align-items: center;
  gap: 24px;
  padding: 19px 0;
  border-bottom: 1px solid var(--line);
}

.model-row__name {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.model-row__meta {
  font-size: 14px;
  color: var(--ink-2);
}

.model-row__action {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.model-row__action svg { width: 12px; height: 12px; }

.model-row:hover .model-row__name { color: var(--brand); }

/* ---------- process band ---------- */

.process__grid {
  display: grid;
  grid-template-columns: minmax(240px, 0.85fr) minmax(0, 1.75fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.process__intro h2 {
  font-size: clamp(24px, 2.6vw, 34px);
  color: #fff;
}

.process__intro p {
  color: var(--on-deep-2);
  font-size: 15px;
  margin-top: 14px;
  max-width: 30ch;
}

.process__intro .btn { margin-top: 24px; }

.process__steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 3vw, 40px);
  position: relative;
}

.process__steps::before {
  content: '';
  position: absolute;
  top: 11px;
  left: 11px;
  right: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.24);
}

.process__step { position: relative; padding-top: 34px; }

.process__num {
  position: absolute;
  top: 0;
  left: 0;
  width: 23px;
  height: 23px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 50%;
  background: var(--bg-deep);
  display: grid;
  place-items: center;
  font-size: 10.5px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.8);
  font-variant-numeric: tabular-nums;
}

.process__step h3 {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
}

.process__step p {
  font-size: 13.5px;
  color: var(--on-deep-2);
  margin-top: 8px;
  line-height: 1.6;
}

/* ---------- guides ---------- */

.guide-list { border-top: 1px solid var(--line); }

.guide-row {
  display: grid;
  grid-template-columns: 118px minmax(120px, 0.8fr) minmax(0, 2fr) 28px;
  align-items: center;
  gap: clamp(16px, 2.4vw, 34px);
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  transition: color 0.2s var(--ease);
}

.guide-row__type {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.guide-row__title {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.012em;
}

.guide-row__desc {
  font-size: 14px;
  color: var(--ink-2);
}

.guide-row__arrow {
  justify-self: end;
  color: var(--ink-3);
  transition: transform 0.25s var(--ease), color 0.25s var(--ease);
}

.guide-row__arrow svg { width: 15px; height: 15px; }

.guide-row:hover .guide-row__title { color: var(--brand); }
.guide-row:hover .guide-row__arrow {
  color: var(--brand);
  transform: translateX(3px);
}

/* ---------- cta band ---------- */

.cta-band {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  padding: clamp(48px, 6vw, 76px) 0;
}

.cta-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-band h2 {
  font-size: clamp(24px, 2.8vw, 36px);
}

.cta-band p {
  font-size: 15px;
  color: var(--ink-2);
  margin-top: 10px;
}

.cta-band__actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.cta-band__note {
  font-size: 12.5px;
  color: var(--ink-3);
  margin-top: 12px;
}

/* ---------- page header (inner pages) ---------- */

.page-head {
  padding: clamp(40px, 5vw, 68px) 0 clamp(28px, 3.4vw, 44px);
  border-bottom: 1px solid var(--line);
}

.page-head--soft { background: var(--bg-soft); }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--ink-3);
  margin-bottom: 16px;
}

.breadcrumb a:hover { color: var(--brand); }

.breadcrumb span { color: var(--line-2); }

.page-head h1 {
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 800;
  letter-spacing: -0.028em;
  max-width: 26ch;
}

.page-head__lead {
  font-size: 16px;
  color: var(--ink-2);
  margin-top: 14px;
  max-width: 56ch;
}

/* ---------- product card ---------- */

.product-card { position: relative; }

.product-card__link { display: flex; flex-direction: column; height: 100%; }

.product-card__media {
  position: relative;
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
  box-shadow: inset 0 0 0 1px var(--line);
  aspect-ratio: 1 / 1;
}

.product-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  mix-blend-mode: multiply;
  filter: saturate(0.96) contrast(1.01);
  transition: transform 0.7s var(--ease), filter 0.4s var(--ease);
}

.product-card:hover .product-card__media img {
  transform: scale(1.025);
  filter: saturate(1) contrast(1.01);
}

.product-card__badge {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 1;
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 9px;
  border-radius: 2px;
}

.product-card__arrow {
  position: absolute;
  right: 10px;
  bottom: 10px;
  z-index: 1;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: #fff;
  border-radius: 50%;
  color: var(--ink);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}

.product-card__arrow svg { width: 12px; height: 12px; }

.product-card:hover .product-card__arrow { opacity: 1; transform: translateY(0); }

.product-card__body { padding: 15px 0 0; }

.product-card__topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.product-card__name {
  font-size: 17.5px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-top: 7px;
}

.product-card__summary {
  font-size: 13.5px;
  color: var(--ink-2);
  margin-top: 6px;
  line-height: 1.55;
}

.product-card__specs {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  margin-top: 13px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.product-card__specs div { display: flex; flex-direction: column; gap: 2px; }

.product-card__specs dt {
  font-size: 10.5px;
  color: var(--ink-3);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.product-card__specs dd {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.product-card.is-hidden { display: none; }

/* ---------- catalog toolbar ---------- */

.catalog-bar {
  position: sticky;
  top: var(--header-h);
  z-index: 40;
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}

.catalog-bar__inner {
  display: flex;
  align-items: center;
  gap: 18px;
  justify-content: space-between;
  flex-wrap: wrap;
}

.filters { display: flex; gap: 6px; flex-wrap: wrap; }

.filter {
  padding: 7px 14px;
  border: 1px solid var(--line-2);
  border-radius: 100px;
  background: #fff;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.18s var(--ease);
  white-space: nowrap;
}

.filter:hover { border-color: var(--ink-3); color: var(--ink); }

.filter.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.catalog-tools { display: flex; align-items: center; gap: 12px; }

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-box svg {
  position: absolute;
  left: 11px;
  width: 14px;
  height: 14px;
  color: var(--ink-3);
  pointer-events: none;
}

.search-box input {
  width: 240px;
  padding: 9px 12px 9px 32px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 13.5px;
  color: var(--ink);
  background: #fff;
}

.search-box input::placeholder { color: var(--ink-3); }

.search-box input:focus {
  outline: none;
  border-color: var(--brand);
}

.result-count {
  font-size: 12.5px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 3vw, 40px) clamp(18px, 2.4vw, 30px);
}

.catalog-empty {
  display: none;
  padding: 72px 0;
  text-align: center;
  color: var(--ink-2);
}

.catalog-empty.is-visible { display: block; }

.catalog-empty h3 { font-size: 20px; margin-bottom: 8px; }

/* ---------- spec table ---------- */

.table-wrap { overflow-x: auto; }

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  min-width: 760px;
}

.spec-table caption {
  text-align: left;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 12px;
}

.spec-table th,
.spec-table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.spec-table thead th {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line-2);
  background: #eef1f6;
}

.spec-table thead th small {
  display: block;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink-3);
  font-size: 10.5px;
}

.spec-table tbody th {
  font-weight: 700;
  color: var(--ink);
}

.spec-table tbody tr:hover { background: rgba(24, 75, 214, 0.03); }

.spec-table tbody tr.is-current {
  background: var(--brand-soft);
}

.spec-table a {
  color: var(--brand);
  border-bottom: 1px solid rgba(24, 75, 214, 0.3);
}

.table-hint {
  font-size: 12px;
  color: var(--ink-3);
  margin-top: 10px;
  display: none;
}

.table-note {
  font-size: 12px;
  color: var(--ink-3);
  margin-top: 16px;
  max-width: 76ch;
  line-height: 1.6;
}

/* spec tabs */

.spec-tabs {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.spec-tab {
  padding: 8px 15px;
  border: 0;
  border-radius: 3px;
  background: transparent;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.18s var(--ease);
  white-space: nowrap;
}

.spec-tab:hover { color: var(--ink); }

.spec-tab.is-active {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(20, 43, 63, 0.08);
}

/* ---------- product detail ---------- */

.pdp {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 60px);
  align-items: start;
  padding: clamp(32px, 4vw, 52px) 0;
}

.gallery__main {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: 0 0 0 1px var(--line);
  aspect-ratio: 1 / 1;
  cursor: zoom-in;
}

.gallery__main img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.gallery__thumb img { object-fit: cover; }

.gallery__thumbs {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.gallery__thumb {
  flex: 0 0 76px;
  width: 76px;
  height: 58px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
  background: #eef2f7;
  cursor: pointer;
  transition: border-color 0.18s var(--ease);
}

.gallery__thumb img { width: 100%; height: 100%; object-fit: cover; }

.gallery__thumb.is-active { border-color: var(--ink); }

.pdp__info h1 {
  font-size: clamp(26px, 3.2vw, 38px);
  letter-spacing: -0.026em;
  margin-top: 6px;
}

.pdp__tagline {
  font-size: 15px;
  color: var(--ink-2);
  margin-top: 10px;
}

.pdp__desc {
  font-size: 14.5px;
  color: var(--ink-2);
  margin-top: 18px;
  line-height: 1.7;
}

.key-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(106px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 24px;
}

.key-specs div {
  background: #fff;
  padding: 14px 16px;
}

.key-specs dt {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-3);
}

.key-specs dd {
  font-size: 15px;
  font-weight: 700;
  margin-top: 3px;
  font-variant-numeric: tabular-nums;
}

.pdp__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.pdp__note {
  font-size: 12px;
  color: var(--ink-3);
  margin-top: 14px;
  line-height: 1.6;
}

/* spec blocks */

.spec-block { padding: clamp(40px, 5vw, 64px) 0; border-top: 1px solid var(--line); }

.spec-block__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.spec-block__head h2 { font-size: clamp(20px, 2.2vw, 26px); }

.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 clamp(24px, 4vw, 56px);
}

.spec-grid > div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13.5px;
}

.spec-grid dt { color: var(--ink-2); }

.spec-grid dd {
  font-weight: 600;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.check-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 30px;
  font-size: 14px;
  color: var(--ink-2);
}

.check-list li {
  position: relative;
  padding-left: 18px;
  line-height: 1.6;
}

.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--brand);
  border-radius: 50%;
}

/* lightbox */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(10, 31, 51, 0.94);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.lightbox.is-open { display: flex; }

.lightbox img {
  max-width: 92vw;
  max-height: 84vh;
  object-fit: contain;
  border-radius: 2px;
}

.lightbox__btn {
  position: absolute;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  cursor: pointer;
  display: grid;
  place-items: center;
}

.lightbox__btn:hover { background: rgba(255, 255, 255, 0.14); }

.lightbox__btn svg { width: 16px; height: 16px; }

.lightbox__close { top: 24px; right: 24px; }
.lightbox__prev { left: 24px; top: 50%; transform: translateY(-50%); }
.lightbox__next { right: 24px; top: 50%; transform: translateY(-50%); }

.lightbox__count {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.7);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}

/* ---------- about page ---------- */

.story {
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(32px, 5vw, 80px);
  align-items: start;
}

.story__body p {
  font-size: 16px;
  color: var(--ink-2);
  line-height: 1.75;
  margin-bottom: 18px;
  max-width: 62ch;
}

.story__body p:last-child { margin-bottom: 0; }

.story__body strong { color: var(--ink); font-weight: 700; }

.fact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: clamp(36px, 4vw, 56px);
}

.fact {
  background: #fff;
  padding: clamp(20px, 2.4vw, 30px);
}

.fact strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
}

.fact span {
  display: block;
  font-size: 12.5px;
  color: var(--ink-2);
  margin-top: 10px;
  line-height: 1.5;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(20px, 2.6vw, 36px);
}

.step {
  padding-top: 20px;
  border-top: 1px solid var(--line-2);
}

.step__num {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--brand);
}

.step h3 {
  font-size: 16.5px;
  margin-top: 10px;
}

.step p {
  font-size: 13.5px;
  color: var(--ink-2);
  margin-top: 7px;
  line-height: 1.6;
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.split img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.split figure { border-radius: var(--radius); overflow: hidden; }

.prose-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--ink-2);
  display: flex;
  gap: 16px;
  line-height: 1.6;
}

.prose-list li strong {
  color: var(--ink);
  font-weight: 700;
  min-width: 132px;
  flex-shrink: 0;
}

/* ---------- contact page ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.95fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
  padding: clamp(36px, 4.6vw, 60px) 0;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field { display: flex; flex-direction: column; gap: 7px; margin-bottom: 16px; }

.field label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-2);
  letter-spacing: 0.01em;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: #fff;
  font-family: var(--font-body);
  font-size: 14.5px;
  color: var(--ink);
  transition: border-color 0.18s var(--ease);
}

.field textarea { min-height: 120px; resize: vertical; }

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--brand);
}

.field input::placeholder,
.field textarea::placeholder { color: var(--ink-3); }

.form-note {
  font-size: 12px;
  color: var(--ink-3);
  margin-top: 14px;
  line-height: 1.6;
}

.info-block {
  border-top: 1px solid var(--line);
  padding: 18px 0;
}

.info-block:first-of-type { border-top: 0; padding-top: 0; }

.info-block h3 {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 8px;
}

.info-block a,
.info-block p {
  font-size: 15px;
  color: var(--ink);
  line-height: 1.7;
}

.info-block a:hover { color: var(--brand); }

.info-panel {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(22px, 2.6vw, 30px);
}

.info-panel .btn { margin-top: 18px; }

.faq-list { border-top: 1px solid var(--line); }

.accordion {
  border-bottom: 1px solid var(--line);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.accordion__icon {
  position: relative;
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.accordion__icon::before,
.accordion__icon::after {
  content: '';
  position: absolute;
  background: var(--ink-2);
  transition: transform 0.22s var(--ease);
}

.accordion__icon::before { top: 6px; left: 0; width: 14px; height: 1.5px; }
.accordion__icon::after { top: 0; left: 6px; width: 1.5px; height: 14px; }

.accordion__trigger[aria-expanded='true'] .accordion__icon::after { transform: scaleY(0); }

.accordion__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.28s var(--ease);
}

.accordion__panel p {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.7;
  padding: 0 0 20px;
  max-width: 66ch;
}

/* ---------- footer ---------- */

.site-footer {
  background: #fff;
  border-top: 1px solid var(--line);
  padding: clamp(44px, 5vw, 64px) 0 24px;
}

.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 0.8fr));
  gap: clamp(24px, 3.4vw, 48px);
  padding-bottom: clamp(32px, 4vw, 48px);
}

.footer__brand p {
  font-size: 13.5px;
  color: var(--ink-2);
  margin-top: 16px;
  max-width: 34ch;
  line-height: 1.7;
}

.footer__social { display: flex; gap: 10px; margin-top: 18px; }

.footer__social a {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  color: var(--ink-2);
  transition: all 0.18s var(--ease);
}

.footer__social a:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.footer__social svg { width: 16px; height: 16px; }

.footer__col h3 {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 14px;
}

.footer__col li { margin-bottom: 9px; }

.footer__col a,
.footer__col address {
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.6;
}

.footer__col a:hover { color: var(--brand); }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--ink-3);
}

.footer__bottom nav { display: flex; gap: 20px; flex-wrap: wrap; }

.footer__bottom a:hover { color: var(--ink); }

.footer__wordmark { display: none; }

/* ---------- utilities ---------- */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 300;
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  font-size: 13px;
}

.skip-link:focus { left: 12px; top: 12px; }

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.reveal.is-visible { opacity: 1; transform: none; }

.not-found {
  min-height: 58vh;
  display: flex;
  align-items: center;
  padding: 80px 0;
}

.not-found h1 {
  font-size: clamp(34px, 5vw, 56px);
  letter-spacing: -0.03em;
}

.not-found p {
  font-size: 15.5px;
  color: var(--ink-2);
  margin: 16px 0 28px;
  max-width: 44ch;
}

.micro {
  font-size: 12px;
  color: var(--ink-3);
}

.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;
}

.catalog-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: clamp(36px, 4vw, 52px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.catalog-note p {
  font-size: 13px;
  color: var(--ink-3);
  max-width: 62ch;
  line-height: 1.6;
}

.form-note.is-visible {
  display: block;
  color: var(--ink-2);
  font-size: 13px;
}

.mt-0 { margin-top: 0 !important; }
.mt-sm { margin-top: 12px; }
.mt-md { margin-top: 24px; }
.mt-lg { margin-top: 36px; }

/* ---------- responsive ---------- */

@media (max-width: 1080px) {
  .nav { gap: 20px; }
  .nav__link { font-size: 13.5px; }
  .footer__top { grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 0.9fr)); }
}

@media (max-width: 900px) {
  .nav,
  .lang-switch { display: none; }

  .menu-toggle { display: flex; }

  .range__viewport { scroll-snap-type: none; }

  .range__nav { display: none; }

  .range__aside { justify-content: flex-start; }

  .hero__title { font-size: clamp(32px, 8vw, 44px); }

  .catalog-grid { grid-template-columns: repeat(2, 1fr); }

  .process__grid,
  .story,
  .contact-grid,
  .pdp,
  .split {
    grid-template-columns: 1fr;
  }

  .process__steps { grid-template-columns: 1fr; gap: 0; }

  .process__steps::before { display: none; }

  .process__step {
    padding: 0 0 22px 34px;
    border-left: 1px solid var(--line-deep);
    margin-left: 11px;
  }

  .process__num { left: -11.5px; }

  .fact-grid { grid-template-columns: repeat(2, 1fr); }

  .step-grid { grid-template-columns: repeat(2, 1fr); }

  .footer__top { grid-template-columns: repeat(2, 1fr); }

  .guide-row {
    grid-template-columns: 1fr 24px;
    gap: 6px 16px;
    padding: 20px 0;
  }

  .guide-row__type { grid-column: 1; }
  .guide-row__desc { grid-column: 1; }
  .guide-row__arrow { grid-row: 1 / span 3; grid-column: 2; align-self: center; }

  .model-row {
    grid-template-columns: 1fr auto;
    gap: 4px 16px;
    padding: 16px 0;
  }

  .model-row__meta { grid-column: 1; }
  .model-row__action { grid-row: 1 / span 2; grid-column: 2; align-self: center; }

  .table-hint { display: block; }
}

@media (max-width: 640px) {
  :root { --header-h: 60px; }

  .header-inner { gap: 10px; }
  .header-actions { gap: 8px; }
  .header-actions .btn--sm { padding: 9px 13px; font-size: 12.5px; }
  .menu-toggle { width: 36px; height: 36px; }
  .brand { gap: 7px; }
  .brand__mark { width: 26px; height: 26px; }
  .brand__type strong { font-size: 17px; }

  .hero { padding-top: 34px; }

  .hero__actions { gap: 14px; flex-direction: column; align-items: stretch; }

  .hero__actions .btn { width: 100%; }

  .hero__actions .link { justify-content: center; }

  .hero-slider__slide img { height: 220px; }

  .hero-slider__caption {
    font-size: 11px;
    padding: 8px 12px;
    max-width: 78%;
  }

  .hero-slider__dots { right: 10px; bottom: 9px; padding: 5px 7px; gap: 4px; }

  .hero-slider__dot { width: 16px; }

  .hero-slider__dot.is-active { width: 26px; }

  .range__aside { width: 100%; justify-content: space-between; }

  .catalog-grid { grid-template-columns: 1fr; }

  .catalog-bar { position: static; padding: 12px 0; }

  .catalog-tools { width: 100%; }

  .search-box { flex: 1; }

  .search-box input { width: 100%; }

  .fact-grid { grid-template-columns: 1fr; }

  .step-grid { grid-template-columns: 1fr; }

  .form-row { grid-template-columns: 1fr; }

  .check-list,
  .spec-grid { grid-template-columns: 1fr; }

  .key-specs { grid-template-columns: repeat(2, 1fr); }

  .footer__top { grid-template-columns: 1fr; gap: 28px; }

  .footer__bottom { flex-direction: column; align-items: flex-start; gap: 14px; }

  .cta-band__inner { flex-direction: column; align-items: flex-start; }

  .cta-band__actions { width: 100%; }

  .cta-band__actions .btn { width: 100%; }

  .brand__type span { display: none; }

  .gallery__main { aspect-ratio: 1 / 1; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }

  .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header,
  .site-footer,
  .catalog-bar,
  .pdp__actions,
  .cta-band { display: none !important; }

  body { color: #000; }

  .spec-table { min-width: 0; font-size: 10pt; }
}