/* ============================================================================
   LXLINK IOT — 珠海联芯智联
   Design system: "precision scale"
   Hairline rules · monospaced indexes · generous whitespace · one electric blue.
   ---------------------------------------------------------------------------
   01 Tokens        05 Header / nav      09 Catalog + filter     13 CTA bands
   02 Reset / base  06 Buttons / links   10 Product drawer       14 Footer
   03 Typography    07 Hero              11 Solutions           15 Utilities
   04 Layout        08 Cards / sections  12 Timeline / tables   16 Motion / a11y
   ========================================================================= */

/* == 01 Tokens ============================================================ */
:root {
  /* ink & paper — 蓝白配色：深藏青 + 白 + 极浅蓝底 */
  --ink: #0c1b33;
  --ink-2: #12233f;
  --ink-3: #1b3050;
  --paper: #ffffff;
  --paper-2: #f3f8fe;
  --paper-3: #e7f0fc;

  /* text */
  --text: #0f1b2d;
  --text-mute: #55698a;
  --text-faint: #8a9bb2;
  --text-invert: #f2f7ff;
  --text-invert-mute: rgba(242, 247, 255, 0.64);

  /* hairlines */
  --line: #dbe6f4;
  --line-2: #eaf1fb;
  --line-ink: rgba(255, 255, 255, 0.14);
  --line-ink-2: rgba(255, 255, 255, 0.07);

  /* accent — 品牌蓝，取自 logo 与原站配色 */
  --accent: #1e6ae8;
  --accent-2: #1450bd;
  --accent-soft: rgba(30, 106, 232, 0.08);
  --accent-line: rgba(30, 106, 232, 0.28);
  --accent-tint: #eaf3fe;
  --accent-deep: #0b2559;
  --accent-deep-2: #17499c;

  /* type */
  --sans: "Inter", "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans CJK SC", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", "JetBrains Mono", "Cascadia Mono",
    Consolas, "Liberation Mono", monospace;

  /* metrics */
  --wrap: 1280px;
  --gutter: clamp(20px, 5vw, 48px);
  --header-h: 68px;
  --sec-y: clamp(76px, 9.5vw, 136px);
  --r: 10px;
  --r-lg: 16px;

  /* motion */
  --dur: 0.5s;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* == 02 Reset / base ====================================================== */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

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

h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 600; line-height: 1.15; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
  margin: 0;
}

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

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

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--ink);
  color: #fff;
  font-size: 13px;
  border-radius: var(--r);
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* == 03 Typography ======================================================== */
.display {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.03;
}

.h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.7rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.08;
}

.h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.026em;
  line-height: 1.12;
}

.h3 {
  font-size: clamp(1.1rem, 1.5vw, 1.3rem);
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.35;
}

.h4 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1.45;
}

.lead {
  font-size: clamp(1rem, 1.15vw, 1.125rem);
  line-height: 1.8;
  color: var(--text-mute);
}

.body {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--text-mute);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
  flex: none;
}
.eyebrow--plain::before { display: none; }
.eyebrow--invert { color: var(--text-invert-mute); }

.mono {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.num {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}

.accent { color: var(--accent); }

/* == 04 Layout ============================================================ */
.wrap {
  width: min(100% - var(--gutter) * 2, var(--wrap));
  margin-inline: auto;
}

.sec { padding: var(--sec-y) 0; position: relative; }
.sec--tight { padding: clamp(48px, 6vw, 80px) 0; }
.sec--paper { background: var(--paper-2); }
.sec--ink { background: var(--ink); color: var(--text-invert); }
.sec--ink .lead,
.sec--ink .body { color: var(--text-invert-mute); }
.sec--ink .eyebrow { color: var(--text-invert-mute); }
.sec--line { border-top: 1px solid var(--line); }

.sec__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 72px);
  align-items: start;
  margin-bottom: clamp(40px, 5vw, 68px);
}
.sec__head .eyebrow { margin-bottom: 20px; }
.sec__head .h2 { max-width: 22ch; }
.sec__head-side { padding-bottom: 0; }
.sec__head-side .lead { max-width: 46ch; }
@media (max-width: 860px) {
  .sec__head { grid-template-columns: 1fr; align-items: start; gap: 20px; }
  .sec__head .h2 { max-width: none; }
}

.grid { display: grid; gap: clamp(16px, 2vw, 28px); }
.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: 1000px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

.rule { height: 1px; background: var(--line); border: 0; margin: 0; }
.sec--ink .rule { background: var(--line-ink); }

/* == 05 Header / nav ====================================================== */
.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: saturate(1.6) blur(16px);
  backdrop-filter: saturate(1.6) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.35s var(--ease), background 0.35s var(--ease);
}
.header.is-stuck {
  border-bottom-color: var(--line);
  background: rgba(255, 255, 255, 0.9);
}
.header__inner {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 40px);
  width: min(100% - var(--gutter) * 2, var(--wrap));
  margin-inline: auto;
}

.progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 1.5px;
  width: 0;
  background: var(--accent);
  transition: width 0.1s linear;
}

/* brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  margin-right: auto;
}
.brand__mark { width: 30px; height: auto; }
.brand__text { display: flex; flex-direction: column; line-height: 1; }
.brand__name {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--ink);
}

/* nav */
.nav { display: flex; align-items: center; gap: clamp(14px, 2vw, 30px); }
.nav__link {
  position: relative;
  font-size: 0.875rem;
  color: var(--text-mute);
  padding: 6px 0;
  transition: color 0.25s var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}
.nav__link:hover { color: var(--text); }
.nav__link:hover::after,
.nav__link[aria-current="page"]::after { transform: scaleX(1); }
.nav__link[aria-current="page"] { color: var(--text); font-weight: 500; }

.header__aside { display: flex; align-items: center; gap: 14px; flex: none; }

/* language switch */
.lang {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 2px;
  background: rgba(255, 255, 255, 0.6);
}
.lang__btn {
  border: 0;
  background: transparent;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.625rem;
  line-height: 1.2;
  /* no letter-spacing here: the trailing letter-space stops 中 / EN from
     sitting dead centre in the pill */
  min-width: 38px;
  padding: 6px 0;
  text-align: center;
  border-radius: 100px;
  color: var(--text-faint);
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}
.lang__btn[aria-pressed="true"] {
  background: var(--ink);
  color: #fff;
}

/* burger */
.burger {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: var(--r);
  cursor: pointer;
  position: relative;
}
.burger span {
  position: absolute;
  left: 11px;
  width: 16px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.burger span:nth-child(1) { top: 15px; }
.burger span:nth-child(2) { top: 21px; }
.burger span:nth-child(3) { top: 27px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* mobile menu */
.menu {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: 95;
  background: rgba(255, 255, 255, 0.98);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  padding: clamp(24px, 6vw, 48px) var(--gutter) 48px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
  overflow-y: auto;
}
.menu.is-open { opacity: 1; transform: none; visibility: visible; }
.menu__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: 1.25rem;
  font-weight: 500;
}
.menu__link .num { flex: none; }
.menu__foot { margin-top: 32px; display: grid; gap: 14px; }

@media (max-width: 1000px) {
  .nav { display: none; }
  .burger { display: block; }
  .header__aside .btn { display: none; }
}
@media (min-width: 1001px) {
  .menu { display: none; }
}

/* == 06 Buttons / links =================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 24px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.01em;
  border-radius: var(--r);
  cursor: pointer;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease),
    color 0.3s var(--ease), transform 0.3s var(--ease);
  white-space: nowrap;
}
.btn:hover { background: var(--accent-2); border-color: var(--accent-2); transform: translateY(-1px); }
.btn:active { transform: none; }

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}
.btn--ghost:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.btn--accent { background: var(--accent); border-color: var(--accent); }
.btn--accent:hover { background: var(--accent-2); border-color: var(--accent-2); }

.btn--invert { background: #fff; border-color: #fff; color: var(--ink); }
.btn--invert:hover { background: var(--accent-tint); border-color: var(--accent-tint); color: var(--accent-2); }

.btn--onink { background: transparent; border-color: var(--line-ink); color: var(--text-invert); }
.btn--onink:hover { background: #fff; border-color: #fff; color: var(--ink); }

.btn__icon { width: 15px; height: 15px; flex: none; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* animated underline link */
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.arrow-link svg { width: 14px; height: 14px; transition: transform 0.35s var(--ease); flex: none; }
.arrow-link:hover { border-bottom-color: var(--accent); color: var(--accent); }
.arrow-link:hover svg { transform: translateX(4px); }

.link-plain {
  border-bottom: 1px solid var(--line);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.link-plain:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* == 07 Hero ============================================================== */
.hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(56px, 8vw, 108px));
  padding-bottom: clamp(56px, 7vw, 96px);
  overflow: hidden;
  background: linear-gradient(180deg, var(--accent-tint) 0%, #f7fbff 46%, var(--paper) 100%);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, var(--line-2) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-2) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: radial-gradient(130% 78% at 50% 0%, #000 0%, transparent 70%);
  mask-image: radial-gradient(130% 78% at 50% 0%, #000 0%, transparent 70%);
}
.hero > .wrap { position: relative; }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 5vw, 80px);
  align-items: center;
}
@media (max-width: 980px) {
  .hero__grid { grid-template-columns: 1fr; gap: 44px; }
}

.hero__eyebrow { margin-bottom: 26px; }
.hero__title { margin-bottom: 26px; max-width: 20ch; }
.hero__title em {
  font-style: normal;
  color: var(--accent);
}
.hero__lead { max-width: 52ch; margin-bottom: 34px; }
.hero__actions { margin-bottom: 46px; }

/* hero product carousel */
.crs {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper);
  overflow: hidden;
  box-shadow: 0 30px 70px -46px rgba(12, 27, 51, 0.34);
}
.crs:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

/* thin bar that doubles as the auto-advance timer. It sits on the seam between
   the image stage and the info bar: that edge is straight, so the card's corner
   radius cannot clip the bar the way it would at the very top. */
.crs__progress {
  position: absolute;
  left: 0;
  top: -1px;
  z-index: 3;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
}
.crs.is-running .crs__progress { animation: crsProgress 5600ms linear forwards; }
.crs:hover .crs__progress,
.crs:focus-within .crs__progress,
body.is-locked .crs__progress { animation-play-state: paused; }
@keyframes crsProgress {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.crs__stage {
  position: relative;
  aspect-ratio: 4 / 3;
  background: linear-gradient(160deg, var(--paper) 0%, var(--paper-2) 100%);
  overflow: hidden;
}
.crs__stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(30, 106, 232, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 106, 232, 0.06) 1px, transparent 1px);
  background-size: 38px 38px;
  -webkit-mask-image: radial-gradient(92% 92% at 50% 44%, #000, transparent 80%);
  mask-image: radial-gradient(92% 92% at 50% 44%, #000, transparent 80%);
  pointer-events: none;
}
.crs__slides { position: absolute; inset: 0; }
.crs__slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(18px, 2.6vw, 34px);
  opacity: 0;
  transform: scale(0.985);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  pointer-events: none;
}
.crs__slide.is-active { opacity: 1; transform: none; pointer-events: auto; }
.crs__slide img { max-width: 100%; max-height: 100%; width: auto; mix-blend-mode: multiply; }
.crs__cat {
  position: absolute;
  left: 14px;
  top: 14px;
  z-index: 2;
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--accent-line);
  border-radius: 100px;
  line-height: 1.2;
  padding: 4px calc(10px - 0.14em) 4px 10px;
}

.crs__bar {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 20px;
  flex-wrap: wrap;
  padding: clamp(16px, 1.9vw, 22px) clamp(18px, 2.2vw, 28px);
  border-top: 1px solid var(--line);
}
.crs__name { font-size: 1rem; font-weight: 600; letter-spacing: -0.008em; }
.crs__open {
  all: unset;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: color 0.3s var(--ease);
}
.crs__open svg { width: 13px; height: 13px; flex: none; transition: transform 0.35s var(--ease); }
.crs__open:hover { color: var(--accent); }
.crs__open:hover svg { transform: translateX(3px); }
.crs__open:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.crs__sub { font-size: 0.8125rem; color: var(--text-mute); margin-top: 7px; line-height: 1.6; }
.crs__count {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.crs__ctrl {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 clamp(18px, 2.2vw, 28px) clamp(16px, 1.8vw, 20px);
}
.crs__dots { display: flex; align-items: center; gap: 7px; }
.crs__dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: 0;
  border-radius: 100px;
  background: var(--paper-3);
  cursor: pointer;
  transition: background 0.3s var(--ease), width 0.35s var(--ease);
}
.crs__dot:hover { background: var(--accent-line); }
.crs__dot[aria-current="true"] { background: var(--accent); width: 24px; }
.crs__dot:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.crs__arrows { display: flex; align-items: center; gap: 8px; }
.crs__btn {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 100px;
  cursor: pointer;
  color: var(--text-mute);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease), background 0.3s var(--ease);
}
.crs__btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.crs__btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.crs__btn svg { width: 13px; height: 13px; }
@media (max-width: 420px) {
  .crs__ctrl { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) {
  .crs.is-running .crs__progress { animation: none; }
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1.2;
  padding: 6px calc(10px - 0.14em) 6px 10px;
  border: 1px solid var(--accent-line);
  border-radius: 100px;
  color: var(--accent);
  background: var(--accent-soft);
  white-space: nowrap;
}
.tag--plain { border-color: var(--line); color: var(--text-faint); background: transparent; }
.sec--ink .tag--plain { border-color: var(--line-ink); color: var(--text-invert-mute); }

/* stat strip */
.strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.strip--bottom { border-bottom: 1px solid var(--line); }
/* Cells are separated by hairlines. The first starts flush with the page edge,
   but every cell after it needs a matching left gutter — otherwise its text
   sits jammed against the divider. */
.strip__cell {
  padding: 24px clamp(14px, 2vw, 26px) 22px 0;
  border-right: 1px solid var(--line);
}
.strip__cell + .strip__cell { padding-left: clamp(14px, 2vw, 26px); }
.strip__cell:last-child { border-right: 0; padding-right: 0; }
.strip__k {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 10px;
}
.strip__v { font-size: clamp(1.05rem, 1.4vw, 1.25rem); font-weight: 600; letter-spacing: -0.012em; }
.strip__d { font-size: 0.8125rem; color: var(--text-mute); margin-top: 6px; line-height: 1.6; }
@media (max-width: 860px) {
  .strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .strip__cell { border-bottom: 1px solid var(--line); }
  .strip__cell:nth-child(2n) { border-right: 0; }
  .strip__cell:nth-last-child(-n + 2) { border-bottom: 0; }
}
@media (max-width: 520px) {
  .strip { grid-template-columns: minmax(0, 1fr); }
  .strip__cell { border-right: 0; }
  .strip__cell + .strip__cell { padding-left: 0; }
  .strip__cell:nth-last-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .strip__cell:last-child { border-bottom: 0; }
}

/* page header band (inner pages) */
.band {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(48px, 7vw, 92px));
  padding-bottom: clamp(40px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: linear-gradient(180deg, var(--accent-tint) 0%, #f8fbff 58%, var(--paper) 100%);
}
.band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, var(--line-2) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-2) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: radial-gradient(110% 100% at 12% 0%, #000, transparent 68%);
  mask-image: radial-gradient(110% 100% at 12% 0%, #000, transparent 68%);
  pointer-events: none;
}
.band > .wrap { position: relative; }
.band__title { max-width: 24ch; margin: 20px 0 22px; }
.band__lead { max-width: 60ch; }
.band__foot { margin-top: 40px; }

/* == 08 Cards / sections ================================================== */
.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper);
  padding: clamp(22px, 2.4vw, 32px);
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease);
}
.card:hover { border-color: var(--ink); }
.card__num {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  display: block;
  margin-bottom: 20px;
}
.card__title { margin-bottom: 12px; }
.card__foot { margin-top: 22px; }

/* feature list with hairline rows */
.flist { border-top: 1px solid var(--line); }
.flist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.flist__idx {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding-top: 4px;
}
.sec--ink .flist,
.sec--ink .flist__item { border-color: var(--line-ink); }

/* capability / scenario rows */
.rows { border-top: 1px solid var(--line); }
.row-item {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) minmax(0, 22ch);
  gap: clamp(16px, 3vw, 40px);
  align-items: baseline;
  padding: clamp(20px, 2.4vw, 28px) 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.3s var(--ease);
}
.row-item:hover { background: var(--paper-2); }
.row-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-start;
}
@media (max-width: 780px) {
  .row-item { grid-template-columns: 52px minmax(0, 1fr); }
  .row-item__tags { grid-column: 2; margin-top: 10px; }
  .row-item__tags { justify-content: flex-start; }
}

/* == 09 Catalog + filter ================================================== */
.filterbar {
  position: sticky;
  top: var(--header-h);
  z-index: 60;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.filterbar__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  width: min(100% - var(--gutter) * 2, var(--wrap));
  margin-inline: auto;
  min-height: 62px;
  padding: 10px 0;
  flex-wrap: wrap;
}
.filters { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 100px;
  line-height: 1.2;
  padding: 9px 15px;
  font-size: 0.875rem;
  color: var(--text-mute);
  cursor: pointer;
  transition: color 0.25s var(--ease), background 0.25s var(--ease),
    border-color 0.25s var(--ease);
  white-space: nowrap;
}
.chip:hover { color: var(--text); background: var(--paper-2); }
.chip[aria-pressed="true"] {
  color: var(--text);
  background: var(--paper-2);
  border-color: var(--line);
  font-weight: 500;
}
.chip__n {
  font-family: var(--mono);
  font-size: 0.625rem;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}
.filterbar__count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.catalog {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 26px);
}
@media (max-width: 1000px) { .catalog { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .catalog { grid-template-columns: minmax(0, 1fr); } }

.prod {
  display: flex;
  flex-direction: column;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper);
  overflow: hidden;
  cursor: pointer;
  padding: 0;
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease);
  width: 100%;
}
.prod:hover { border-color: var(--ink); transform: translateY(-3px); }
.prod__shot {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--paper-2);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.prod__shot img {
  max-height: 100%;
  width: auto;
  mix-blend-mode: multiply;
  transition: transform 0.7s var(--ease);
}
.prod:hover .prod__shot img { transform: scale(1.045); }
.prod__cat {
  position: absolute;
  left: 14px;
  top: 14px;
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mute);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  border-radius: 100px;
  line-height: 1.2;
  padding: 5px calc(10px - 0.14em) 5px 10px;
}
.prod__body {
  padding: clamp(18px, 1.8vw, 24px);
  display: flex;
  flex-direction: column;
  flex: 1;
}
.prod__name { font-size: 1rem; font-weight: 600; line-height: 1.45; letter-spacing: -0.008em; }
.prod__sub {
  font-size: 0.8125rem;
  color: var(--text-mute);
  margin-top: 8px;
  line-height: 1.6;
  flex: 1;
}
.prod__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
}
.prod__more {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  transition: color 0.3s var(--ease);
}
.prod:hover .prod__more { color: var(--accent); }
.prod.is-hidden { display: none; }

.empty-note {
  padding: 60px 0;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.9375rem;
}

/* == 10 Product drawer ==================================================== */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 120;
  visibility: hidden;
}
.drawer.is-open { visibility: visible; }
.drawer__scrim {
  position: absolute;
  inset: 0;
  background: rgba(8, 10, 14, 0.5);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
}
.drawer.is-open .drawer__scrim { opacity: 1; }
.drawer__panel {
  position: absolute;
  inset: 0 0 0 auto;
  width: min(620px, 100%);
  background: var(--paper);
  display: flex;
  flex-direction: column;
  transform: translateX(24px);
  opacity: 0;
  transition: transform 0.45s var(--ease), opacity 0.35s var(--ease);
  box-shadow: -24px 0 60px -30px rgba(8, 10, 14, 0.35);
}
.drawer.is-open .drawer__panel { transform: none; opacity: 1; }
.drawer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px clamp(20px, 3vw, 40px);
  border-bottom: 1px solid var(--line);
  flex: none;
}
.drawer__close {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 100px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.drawer__close:hover { border-color: var(--ink); background: var(--paper-2); }
.drawer__close svg { width: 14px; height: 14px; }
.drawer__scroll { overflow-y: auto; padding: clamp(24px, 3vw, 40px); flex: 1; }

.drawer__shot {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 26px;
  margin-bottom: 28px;
}
.drawer__shot img { max-height: 100%; width: auto; mix-blend-mode: multiply; }
.drawer__title { margin: 16px 0 10px; }
.drawer__en {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  line-height: 1.7;
}
.drawer__h {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 36px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.spec-table { border-top: 1px solid var(--line); }
.spec-table__row {
  display: grid;
  grid-template-columns: minmax(0, 34%) minmax(0, 1fr);
  gap: 18px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-2);
}
.spec-table__k { font-size: 0.8125rem; color: var(--text-faint); }
.spec-table__v {
  font-size: 0.8125rem;
  color: var(--text);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

.drawer__cta {
  margin-top: 34px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper-2);
}
.drawer__cta .btn-row { margin-top: 16px; }
@media (max-width: 640px) {
  .drawer__panel { width: 100%; }
}

/* == 11 Small labels / chips ============================================== */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.chip-plain {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  border: 1px solid var(--line);
  border-radius: 100px;
  line-height: 1.2;
  padding: 7px calc(12px - 0.1em) 7px 12px;
  color: var(--text-mute);
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}
.chip-plain:hover { border-color: var(--accent); color: var(--accent); }

/* == 12 Timeline / tables ================================================= */
.timeline { border-top: 1px solid var(--line); }
.tl-item {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: clamp(18px, 3vw, 44px);
  padding: clamp(22px, 2.6vw, 32px) 0;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.tl-item__idx {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--text-faint);
  padding-top: 5px;
}
.tl-item__idx::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 100px;
  border: 1px solid var(--accent);
  margin-right: 10px;
  vertical-align: 1px;
}
.tl-item__title { margin-bottom: 8px; }
@media (max-width: 640px) {
  .tl-item { grid-template-columns: minmax(0, 1fr); gap: 10px; }
}

/* definition rows (company info) */
.dl { border-top: 1px solid var(--line); }
.dl__row {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: clamp(14px, 3vw, 40px);
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.dl__k {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.dl__v { font-size: 0.9375rem; }
@media (max-width: 640px) {
  .dl__row { grid-template-columns: minmax(0, 1fr); gap: 6px; }
}

/* process steps */
.steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.step {
  padding: 26px clamp(14px, 1.6vw, 24px) 30px 0;
  border-right: 1px solid var(--line);
  position: relative;
}
.step + .step { padding-left: clamp(14px, 1.6vw, 24px); }
.step:last-child { border-right: 0; padding-right: 0; }
.step::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 100px;
  background: var(--accent);
}
.step:first-child::before { left: 0; }
.step__num {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--text-faint);
  display: block;
  margin-bottom: 14px;
}
.sec--ink .steps { border-color: var(--line-ink); }
.sec--ink .step { border-color: var(--line-ink); }
@media (max-width: 980px) {
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step { border-bottom: 1px solid var(--line); }
  .step:nth-child(2n) { border-right: 0; }
  .step:nth-last-child(-n + 1) { border-bottom: 0; }
}
@media (max-width: 560px) {
  .steps { grid-template-columns: minmax(0, 1fr); }
  .step { border-right: 0; }
  .step + .step { padding-left: 0; }
  .step:last-child { border-bottom: 0; }
}

/* == 13 CTA bands ========================================================= */
.cta {
  position: relative;
  background: linear-gradient(135deg, var(--accent-deep) 0%, var(--accent-deep-2) 100%);
  color: var(--text-invert);
  overflow: hidden;
}
.cta::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(58% 128% at 92% 4%, rgba(47, 134, 255, 0.4), transparent 64%);
  pointer-events: none;
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, var(--line-ink-2) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-ink-2) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: radial-gradient(100% 100% at 88% 0%, #000, transparent 70%);
  mask-image: radial-gradient(100% 100% at 88% 0%, #000, transparent 70%);
  pointer-events: none;
}
.cta > .wrap { position: relative; z-index: 1; }
.cta__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 72px);
  align-items: end;
}
@media (max-width: 900px) { .cta__grid { grid-template-columns: 1fr; } }
.cta__title { margin: 20px 0 20px; max-width: 20ch; }
.cta__lead { max-width: 52ch; }
.cta__meta { display: grid; gap: 18px; }
.cta__meta-row { border-top: 1px solid var(--line-ink); padding-top: 16px; }
.cta__meta-row:last-child { padding-bottom: 0; }
.cta__meta-k {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-invert-mute);
  margin-bottom: 8px;
}
.cta__meta-v { font-size: 1.0625rem; font-weight: 500; }
.cta__meta-v a { border-bottom: 1px solid var(--line-ink); transition: border-color 0.3s var(--ease); }
.cta__meta-v a:hover { border-bottom-color: var(--accent); color: var(--accent); }

/* == 14 Footer =========================================================== */
.footer { background: var(--ink); color: var(--text-invert); padding-top: clamp(56px, 7vw, 88px); }
.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 3vw, 56px);
  padding-bottom: clamp(40px, 5vw, 64px);
}
@media (max-width: 900px) { .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .footer__grid { grid-template-columns: minmax(0, 1fr); } }
.footer__brand { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.footer__brand img { width: 34px; }
.footer__brand span { font-size: 1rem; font-weight: 600; }
.footer__desc { color: var(--text-invert-mute); font-size: 0.875rem; line-height: 1.8; max-width: 34ch; }
.footer__h {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-invert-mute);
  margin-bottom: 20px;
}
.footer__links { display: grid; gap: 12px; }
.footer__links a {
  font-size: 0.875rem;
  color: rgba(244, 245, 247, 0.82);
  transition: color 0.25s var(--ease);
  width: fit-content;
}
.footer__links a:hover { color: var(--accent); }
.footer__bottom {
  border-top: 1px solid var(--line-ink);
  padding: 24px 0 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-invert-mute);
}
.footer__bottom a:hover { color: var(--accent); }

/* big typographic wordmark */
.wordmark {
  font-size: clamp(2.2rem, 10vw, 9rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 0.86;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.14);
  padding: clamp(10px, 2vw, 26px) 0 clamp(6px, 1.5vw, 18px);
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
}

/* == 15 Utilities ========================================================= */
.center { text-align: center; }
.mt-s { margin-top: 16px; }
.mt-m { margin-top: 28px; }
.mt-l { margin-top: 44px; }
.mb-m { margin-bottom: 28px; }
.max-60 { max-width: 60ch; }
.max-46 { max-width: 46ch; }
.invert-mute { color: var(--text-invert-mute); }
.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;
}

/* back to top */
.totop {
  position: fixed;
  right: clamp(16px, 3vw, 32px);
  bottom: clamp(16px, 3vw, 32px);
  z-index: 80;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: 100px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s,
    border-color 0.3s var(--ease);
}
.totop.is-on { opacity: 1; visibility: visible; transform: none; }
.totop:hover { border-color: var(--ink); }
.totop svg { width: 15px; height: 15px; }

/* mobile sticky contact bar */
.dock {
  position: fixed;
  inset: auto 0 0;
  z-index: 90;
  display: none;
  background: rgba(255, 255, 255, 0.95);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--line);
  padding: 10px var(--gutter) calc(10px + env(safe-area-inset-bottom));
  gap: 10px;
}
.dock .btn { flex: 1; padding: 12px 10px; }
@media (max-width: 640px) {
  .dock { display: flex; }
  .totop { bottom: 74px; }
  .footer__bottom { padding-bottom: 76px; }
  body { padding-bottom: 0; }
}

/* == 16 Motion / a11y ===================================================== */
/* Progressive enhancement: content is visible by default. The `js` class is set
   by an inline script in <head>, so the entrance animation only ever applies
   when JavaScript is actually available to reveal it again. */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
  transition-delay: var(--d, 0ms);
}
html.js [data-reveal].is-in { opacity: 1; transform: none; }
/* content that was already on screen at load snaps straight to its final state */
html.js [data-reveal].no-anim { transition: none; }

/* language toggling */
html[data-lang="en"] .i18n-zh { display: none; }
html[data-lang="zh"] .i18n-en { display: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  html.js [data-reveal] { opacity: 1; transform: none; }
}

@media print {
  .header, .dock, .totop, .filterbar, .drawer { display: none !important; }
  body { color: #000; }
}

/* == 17 Component glue ==================================================== */
.card { display: block; }
.prod { position: relative; }

/* stretched-link: one focusable control per card, whole card clickable */
.stretch { all: unset; cursor: pointer; }
.stretch::after { content: ""; position: absolute; inset: 0; z-index: 1; }
.stretch:focus-visible { outline: none; }
.prod:focus-within {
  border-color: var(--ink);
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* == 18 Forms ============================================================= */
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.form-grid .field--wide { grid-column: 1 / -1; }
@media (max-width: 640px) { .form-grid { grid-template-columns: minmax(0, 1fr); } }

.field { display: grid; gap: 9px; }
.field > label {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--paper);
  font-size: 0.9375rem;
  line-height: 1.6;
  transition: border-color 0.25s var(--ease);
}
.field textarea { min-height: 128px; resize: vertical; font-family: inherit; }
.field input:focus,
.field select:focus,
.field textarea:focus { outline: none; border-color: var(--ink); }
.field input::placeholder,
.field textarea::placeholder { color: var(--text-faint); }
.form-note { font-size: 0.8125rem; line-height: 1.7; color: var(--text-faint); margin-top: 16px; }
.form-panel {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(22px, 3vw, 38px);
  background: var(--paper);
}

/* contact tiles */
.tile {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(20px, 2.4vw, 28px);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
a.tile:hover { border-color: var(--ink); transform: translateY(-2px); }
.tile__k {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.tile__v { font-size: 1.0625rem; font-weight: 500; letter-spacing: -0.01em; }
.tile__d { font-size: 0.8125rem; color: var(--text-mute); line-height: 1.7; }

/* dark panel (topology + notes) */
.panel-ink {
  background: var(--ink);
  border-radius: var(--r-lg);
  padding: clamp(22px, 3vw, 40px);
  color: var(--text-invert);
}
.panel-ink img { width: 100%; height: auto; }