/* =========================================================
   IOT-TIME 官方网站 · 设计系统
   风格：极简 / 克制 / 工程质感 —— “大厂气质”
   ========================================================= */

/* ---------- 1. Tokens ---------- */
:root {
  --paper: #f7f5f1;
  --paper-2: #f1ede7;
  --white: #ffffff;
  --ink: #141414;
  --ink-2: #34373a;
  --muted: #6f7375;
  --muted-2: #767a7c;
  --line: #e3ded6;
  --line-2: #d2ccc2;

  --red: #ff0520;
  --red-deep: #d6001a;
  --green: #8cf0a4;
  --green-dim: #4fbf6d;

  --dark: #0b0d0e;
  --dark-2: #131617;
  --stage-a: #dad0ca;
  --stage-b: #efe8e5;

  --r-xl: 32px;
  --r-lg: 24px;
  --r: 16px;
  --r-sm: 10px;

  --container: 1200px;
  --header: 72px;
  --ease: cubic-bezier(0.22, 0.68, 0.24, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --sans: "HarmonyOS Sans SC", "MiSans", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei UI", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
  --display: "Segoe UI Variable Display", "SF Pro Display", "Helvetica Neue",
    "PingFang SC", "Microsoft YaHei UI Light", "Microsoft YaHei Light",
    "Microsoft YaHei", sans-serif;
  --mono: "Cascadia Code", "SF Mono", "JetBrains Mono", "Consolas",
    "Liberation Mono", monospace;
}

/* ---------- 2. Reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.72;
  font-weight: 400;
  letter-spacing: 0.002em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body.no-scroll {
  overflow: hidden;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
  border-radius: 4px;
}

h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--display);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.18;
  text-wrap: balance;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- 3. Utilities ---------- */
.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

.container--narrow {
  width: min(880px, 100% - 48px);
  margin-inline: auto;
}

.section {
  padding: 120px 0;
}

.section--tight {
  padding: 80px 0;
}

.section--paper {
  background: var(--paper-2);
}

.hairline {
  height: 1px;
  background: var(--line);
  border: 0;
}

.mono {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  font-weight: 400;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--red);
  flex: none;
}

.lead {
  font-size: 17.5px;
  line-height: 1.8;
  color: var(--muted);
  font-weight: 400;
  text-wrap: pretty;
}

.small {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

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

.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;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 999;
  padding: 10px 16px;
  background: var(--ink);
  color: #fff;
  border-radius: 8px;
  font-size: 13px;
  transform: translateY(-160%);
  transition: transform 0.25s var(--ease);
}

.skip-link:focus {
  transform: none;
}

/* ---------- 4. Typography scale ---------- */
.t-xl {
  font-size: clamp(44px, 5.2vw, 78px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.t-l {
  font-size: clamp(34px, 3.5vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.028em;
}

.t-m {
  font-size: clamp(24px, 2vw, 30px);
  line-height: 1.32;
  letter-spacing: -0.02em;
}

.title-dot {
  color: var(--red);
}

/* ---------- 5. Buttons ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 50px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: background 0.3s var(--ease), color 0.3s var(--ease),
    border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.btn svg {
  width: 15px;
  height: 15px;
  transition: transform 0.35s var(--ease);
}

.btn:hover svg {
  transform: translateX(3px);
}

.btn--primary {
  background: var(--ink);
  color: var(--paper);
}

.btn--primary:hover {
  background: var(--red);
  color: #fff;
}

.btn--ghost {
  border: 1px solid var(--line-2);
  color: var(--ink);
}

.btn--ghost:hover {
  border-color: var(--ink);
  background: rgba(255, 255, 255, 0.6);
}

.btn--light {
  background: var(--paper);
  color: var(--ink);
}

.btn--light:hover {
  background: var(--green);
}

.btn--sm {
  height: 40px;
  padding: 0 18px;
  font-size: 13px;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.45;
  pointer-events: none;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  border-bottom: 1px solid var(--line-2);
  padding-bottom: 4px;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.link-arrow svg {
  width: 14px;
  height: 14px;
  transition: transform 0.35s var(--ease);
}

.link-arrow:hover {
  color: var(--red);
  border-color: var(--red);
}

.link-arrow:hover svg {
  transform: translateX(3px);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 26px;
  padding: 0 11px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
  white-space: nowrap;
}

.badge::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.55;
}

.badge--red {
  color: var(--red);
  border-color: rgba(255, 5, 32, 0.3);
  background: rgba(255, 5, 32, 0.05);
}

.badge--red::before {
  opacity: 1;
  animation: pulse 2.4s ease-in-out infinite;
}

.badge--green {
  color: var(--green-dim);
  border-color: rgba(79, 191, 109, 0.35);
  background: rgba(79, 191, 109, 0.08);
}

.badge--dark {
  color: #c9cfcd;
  border-color: rgba(255, 255, 255, 0.18);
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.35;
    transform: scale(0.8);
  }
}

/* ---------- 6. Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 120;
  height: var(--header);
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease),
    backdrop-filter 0.4s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(247, 245, 241, 0.8);
  -webkit-backdrop-filter: blur(18px) saturate(1.25);
  backdrop-filter: blur(18px) saturate(1.25);
  border-bottom-color: var(--line);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 100%;
}

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

.brand img {
  height: 22px;
  width: auto;
}

.brand__suffix {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--muted);
  padding-left: 14px;
  border-left: 1px solid var(--line-2);
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.nav a {
  position: relative;
  padding: 9px 15px;
  border-radius: 999px;
  font-size: 14px;
  color: var(--ink-2);
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}

.nav a:hover {
  color: var(--ink);
  background: rgba(20, 20, 20, 0.045);
}

.nav a.is-active {
  color: var(--ink);
  font-weight: 500;
}

.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 3px;
  height: 1px;
  background: var(--red);
}

.header__cta {
  margin-left: 18px;
  flex: none;
}

.burger {
  display: none;
  width: 44px;
  height: 44px;
  margin-right: -10px;
  position: relative;
  z-index: 110;
}

.burger span {
  position: absolute;
  left: 11px;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.4s var(--ease), opacity 0.3s var(--ease);
}

.burger span:nth-child(1) {
  top: 17px;
}

.burger span:nth-child(2) {
  top: 22px;
}

.burger span:nth-child(3) {
  top: 27px;
}

.burger.is-open span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.burger.is-open span:nth-child(2) {
  opacity: 0;
}

.burger.is-open span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* mobile menu */
.mnav {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--paper);
  padding: calc(var(--header) + 24px) 24px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.35s var(--ease), visibility 0.35s, transform 0.35s var(--ease);
}

.mnav.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.mnav nav {
  display: flex;
  flex-direction: column;
}

.mnav nav a {
  padding: 18px 0;
  font-family: var(--display);
  font-size: 30px;
  font-weight: 300;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mnav nav a span {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.1em;
}

.mnav nav a.is-active {
  color: var(--red);
}

.mnav__foot {
  display: grid;
  gap: 6px;
  font-size: 13.5px;
  color: var(--muted);
}

.mnav__foot strong {
  color: var(--ink);
  font-weight: 500;
  font-size: 17px;
}

/* ---------- 7. Hero ---------- */
.hero {
  position: relative;
  padding-top: calc(var(--header) + 78px);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  gap: clamp(32px, 5vw, 76px);
  align-items: center;
  padding-bottom: 56px;
}

.hero__title {
  margin-top: 26px;
  font-size: clamp(44px, 5.3vw, 78px);
  line-height: 1.07;
  letter-spacing: -0.04em;
}

.hero__title em {
  font-style: normal;
}

.hero__sub {
  margin-top: 30px;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--muted);
  text-wrap: pretty;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.hero__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 40px;
  color: var(--muted);
  font-size: 12.5px;
}

.hero__meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--line-2);
}

/* product stage */
.stage {
  position: relative;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: linear-gradient(180deg, var(--stage-a) 0%, var(--stage-b) 100%);
}

.stage img {
  width: 100%;
  height: auto;
}

.stage__chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #3c3a38;
}

.stage__chip--tl {
  top: 18px;
  left: 18px;
}

.stage__chip--bl {
  bottom: 18px;
  left: 18px;
}

.stage__chip .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--red);
}

.hero__caption {
  margin-top: 16px;
  text-align: right;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--muted-2);
  text-transform: uppercase;
}

/* spec bar */
.specbar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.specbar__item {
  padding: 30px 28px 32px;
  border-left: 1px solid var(--line);
}

.specbar__item:first-child {
  border-left: 0;
  padding-left: 0;
}

.specbar__num {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--display);
  font-size: clamp(34px, 3vw, 46px);
  font-weight: 300;
  letter-spacing: -0.045em;
  line-height: 1;
}

.specbar__num small {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-weight: 400;
}

.specbar__label {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-2);
}

.specbar__desc {
  margin-top: 2px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--muted-2);
  text-transform: uppercase;
}

/* ---------- 8. Section header ---------- */
.sec-head {
  margin-bottom: 56px;
}

.sec-head__top {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.sec-head__top .hairline {
  flex: 1;
}

.sec-head__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: end;
}

.sec-head h2 {
  font-size: clamp(32px, 3.4vw, 50px);
  line-height: 1.14;
  letter-spacing: -0.03em;
}

.sec-head__lead {
  padding-bottom: 6px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 40ch;
  text-wrap: pretty;
}

.sec-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  margin-top: 48px;
}

/* ---------- 9. Shift (before / after) ---------- */
.shift {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--white);
}

.shift__col {
  padding: 44px 44px 38px;
}

.shift__col + .shift__col {
  border-left: 1px solid var(--line);
  background: linear-gradient(180deg, #fff 0%, #fbf9f6 100%);
}

.shift__label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.shift__col h3 {
  margin-top: 18px;
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.02em;
}

.shift__col h3 em {
  font-style: normal;
  color: var(--muted-2);
}

.steps {
  margin-top: 26px;
}

.steps li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--ink-2);
}

.steps li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.steps .idx {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--muted-2);
  width: 22px;
  flex: none;
}

.steps--now .idx {
  color: var(--red);
}

.steps--old li {
  color: var(--muted);
}

.steps--old li::after {
  content: "";
  flex: 1;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    var(--line-2) 0 4px,
    transparent 4px 9px
  );
  opacity: 0.5;
}

.shift__note {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 10. Capabilities grid ---------- */
.caps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.cap {
  position: relative;
  padding: 34px 32px 38px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: transparent;
  transition: background 0.45s var(--ease);
}

.cap:hover {
  background: var(--white);
}

.cap__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--muted-2);
  text-transform: uppercase;
}

.cap__top .idx {
  color: var(--line-2);
}

.cap h3 {
  margin-top: 54px;
  font-size: 19px;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.cap p {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.cap__arrow {
  position: absolute;
  top: 30px;
  right: 30px;
  width: 14px;
  height: 14px;
  color: var(--line-2);
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

.cap:hover .cap__arrow {
  opacity: 1;
  transform: none;
  color: var(--red);
}

/* ---------- 11. Dark band ---------- */
.band {
  position: relative;
  background: var(--dark);
  color: #edefec;
  padding: 120px 0;
  overflow: hidden;
}

.band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 62%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 62%);
  pointer-events: none;
}

.band .eyebrow {
  color: #8e9494;
}

.band .eyebrow::before {
  background: var(--green);
}

.band .sec-head h2 {
  color: #f4f5f3;
}

.band .sec-head__lead {
  color: #9aa0a0;
}

.band .hairline {
  background: rgba(255, 255, 255, 0.12);
}

.band .sec-head__top .hairline {
  background: rgba(255, 255, 255, 0.12);
}

/* tabs */
.tabs {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
}

.tab {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 12.5px;
  color: #9aa0a0;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

.tab:hover {
  color: #fff;
}

.tab.is-active {
  background: #f4f5f3;
  color: #141414;
}

/* hardware layout */
.hw {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
  margin-top: 48px;
}

.hw__stage {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(180deg, var(--stage-a), var(--stage-b));
}

.hw__stage img {
  width: 100%;
  height: auto;
  transition: opacity 0.4s var(--ease);
}

.hw__stage img.is-swapping {
  opacity: 0;
}

.hw__stage .stage__chip {
  background: rgba(10, 12, 13, 0.55);
  border-color: rgba(255, 255, 255, 0.18);
  color: #e6e8e6;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.hw__panel .tabs {
  margin-bottom: 26px;
}

.iface {
  border-top: 1px solid rgba(255, 255, 255, 0.13);
}

.iface__row {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 17px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.iface__ch {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--green);
}

.iface__name {
  font-size: 14.5px;
  color: #e3e6e4;
}

.iface__name small {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: #7c8483;
  margin-top: 2px;
}

.iface__count {
  font-family: var(--mono);
  font-size: 12px;
  color: #9aa0a0;
}

.hw__foot {
  margin-top: 22px;
  font-size: 12px;
  line-height: 1.75;
  color: #8b9190;
}

.hw__foot strong {
  color: #d5d8d6;
  font-weight: 500;
}

/* ---------- 12. Cards / projects ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 0;
  text-align: left;
  font-family: inherit;
  color: inherit;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform 0.55s var(--ease), box-shadow 0.55s var(--ease),
    border-color 0.4s var(--ease);
}

a.card:hover,
button.card:hover {
  transform: translateY(-5px);
  border-color: var(--line-2);
  box-shadow: 0 26px 50px -32px rgba(20, 20, 20, 0.35);
}

.card__cover {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #0e1112;
  overflow: hidden;
  display: grid;
  place-items: center;
}

.card__cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(circle at 50% 45%, #000 20%, transparent 78%);
  mask-image: radial-gradient(circle at 50% 45%, #000 20%, transparent 78%);
}

.card__cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    180deg,
    transparent 0 3px,
    rgba(0, 0, 0, 0.22) 3px 4px
  );
  opacity: 0.5;
  pointer-events: none;
}

.card__art {
  position: relative;
  z-index: 1;
  width: 62%;
  height: auto;
  color: var(--green);
  filter: drop-shadow(0 0 14px rgba(140, 240, 164, 0.22));
}

.card__tag {
  position: absolute;
  top: 14px;
  left: 16px;
  z-index: 2;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.42);
}

.card__status {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
}

.card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 24px 26px 26px;
}

.card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.card__meta .sep {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--line-2);
}

.card h3 {
  margin-top: 12px;
  font-size: 19px;
  font-weight: 400;
  letter-spacing: -0.015em;
}

.card p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  padding-top: 22px;
  font-size: 12.5px;
  color: var(--muted);
}

.card__foot .arrow {
  width: 16px;
  height: 16px;
  color: var(--ink);
  transition: transform 0.4s var(--ease), color 0.3s;
}

.card:hover .card__foot .arrow {
  transform: translateX(4px);
  color: var(--red);
}

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

.chip {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: #fbfaf8;
  white-space: nowrap;
}

/* ---------- 13. Modules ---------- */
.modules {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.module {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 30px 32px 32px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--white);
  overflow: hidden;
}

.module__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.module__model {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--red);
  text-transform: uppercase;
}

.module h3 {
  margin-top: 10px;
  font-size: 21px;
  font-weight: 400;
}

.module p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.module__art {
  margin-top: 24px;
  border-radius: var(--r);
  background: #0e1112;
  padding: 20px;
  color: var(--green);
}

.module__art svg {
  width: 100%;
  height: auto;
}

.module__list {
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.module__list div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--ink-2);
}

.module__list div span:last-child {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}

/* ---------- 14. Phone mock ---------- */
.appsplit {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
}

.phone-wrap {
  display: grid;
  place-items: center;
  padding: 40px;
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, #efeae4 0%, #e6dfd7 100%);
}

.phone {
  width: 268px;
  aspect-ratio: 9 / 18.5;
  border-radius: 40px;
  border: 7px solid #17191a;
  background: #0d0f10;
  box-shadow: 0 40px 60px -40px rgba(0, 0, 0, 0.55),
    inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  padding: 14px 12px 12px;
  display: flex;
  flex-direction: column;
  color: #e8ebe8;
  position: relative;
  overflow: hidden;
}

.phone::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 5px;
  border-radius: 999px;
  background: #24282a;
}

.phone__status {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
  color: #7f8886;
  padding: 6px 6px 0;
}

.phone__head {
  padding: 16px 6px 12px;
}

.phone__head .mono {
  font-size: 8px;
  color: var(--green);
}

.phone__head h4 {
  margin-top: 6px;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.phone__card {
  margin: 4px 2px;
  padding: 12px;
  border-radius: 14px;
  background: #15191a;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.phone__card .mono {
  font-size: 7.5px;
  color: #7f8886;
}

.phone__code {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 8.5px;
  line-height: 1.9;
  color: #9fb3ac;
}

.phone__code b {
  color: var(--green);
  font-weight: 400;
}

.phone__code i {
  color: #e6c987;
  font-style: normal;
}

.phone__row {
  display: flex;
  gap: 8px;
  margin: 10px 2px 0;
}

.phone__tile {
  flex: 1;
  padding: 10px;
  border-radius: 12px;
  background: #15191a;
  border: 1px solid rgba(255, 255, 255, 0.06);
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: 0.04em;
  color: #8b9592;
}

.phone__tile strong {
  display: block;
  margin-top: 6px;
  font-family: var(--display);
  font-size: 15px;
  font-weight: 300;
  color: #eef1ee;
  letter-spacing: -0.02em;
}

.phone__mic {
  margin: auto auto 6px;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: var(--red);
  display: grid;
  place-items: center;
  box-shadow: 0 12px 30px -12px rgba(255, 5, 32, 0.8);
}

.phone__mic svg {
  width: 22px;
  height: 22px;
  color: #fff;
}

.appsplit__list {
  margin-top: 30px;
  border-top: 1px solid var(--line);
}

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

.appsplit__list li span {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted-2);
  flex: none;
  padding-top: 4px;
}

.appsplit__list li strong {
  font-weight: 500;
}

/* ---------- 15. Quote / IP ---------- */
.quote {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
  padding: 76px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.quote__avatar {
  width: 128px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #0e1112;
  display: grid;
  place-items: center;
  color: var(--green);
  position: relative;
  overflow: hidden;
}

.quote__avatar svg {
  width: 58%;
}

.quote__avatar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    180deg,
    transparent 0 2px,
    rgba(0, 0, 0, 0.25) 2px 3px
  );
  opacity: 0.4;
}

.quote blockquote {
  font-family: var(--display);
  font-size: clamp(26px, 3.1vw, 42px);
  font-weight: 300;
  line-height: 1.42;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.quote blockquote em {
  font-style: normal;
  color: var(--red);
}

.quote__by {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
  font-size: 13px;
  color: var(--muted);
}

.quote__by strong {
  color: var(--ink);
  font-weight: 500;
}

.quote__by .line {
  width: 32px;
  height: 1px;
  background: var(--line-2);
}

/* ---------- 16. News list ---------- */
.newslist {
  border-top: 1px solid var(--line);
}

.newsitem {
  display: grid;
  grid-template-columns: 104px 128px minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  transition: padding 0.4s var(--ease);
}

.newsitem__date {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted-2);
}

.newsitem__cat {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
}

.newsitem__title {
  font-size: 17px;
  font-weight: 400;
  letter-spacing: -0.01em;
  transition: color 0.3s var(--ease);
}

.newsitem__arrow {
  width: 16px;
  height: 16px;
  color: var(--line-2);
  transition: transform 0.4s var(--ease), color 0.3s;
}

.newsitem:hover .newsitem__title {
  color: var(--red);
}

.newsitem:hover .newsitem__arrow {
  transform: translateX(4px);
  color: var(--red);
}

.feature {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--white);
}

.feature__media {
  position: relative;
  min-height: 320px;
  background: #0e1112;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.feature__media svg {
  width: 54%;
  color: var(--green);
  opacity: 0.9;
}

.feature__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 10%, transparent 75%);
  mask-image: radial-gradient(circle at 50% 50%, #000 10%, transparent 75%);
}

.feature__body {
  padding: 44px 46px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.feature__body h2 {
  margin-top: 18px;
  font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.3;
}

.feature__body p {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 17. CTA + footer ---------- */
.cta {
  position: relative;
  background: var(--dark);
  color: var(--paper);
  padding: 120px 0 96px;
  overflow: hidden;
}

.cta::before {
  content: "";
  position: absolute;
  width: 640px;
  height: 640px;
  right: -200px;
  bottom: -420px;
  background: radial-gradient(circle, rgba(255, 5, 32, 0.25) 0%, transparent 62%);
  pointer-events: none;
}

.cta h2 {
  max-width: 16ch;
  font-size: clamp(38px, 4.4vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.035em;
  color: #f5f6f4;
}

.cta__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 44px;
}

.cta__phone {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: #b7bdbc;
}

.cta__phone:hover {
  color: var(--green);
}

.footer {
  background: var(--dark);
  color: #8d9392;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  padding: 64px 0 32px;
  font-size: 13.5px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer__brand img {
  height: 24px;
  width: auto;
  margin-bottom: 18px;
}

.footer__brand p {
  max-width: 30ch;
  line-height: 1.8;
  color: #7d8483;
}

.footer h4 {
  color: #d9dcd9;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.footer ul {
  display: grid;
  gap: 10px;
}

.footer a {
  transition: color 0.25s var(--ease);
}

.footer a:hover {
  color: #fff;
}

.footer__contact {
  display: grid;
  gap: 12px;
}

.footer__contact strong {
  display: block;
  color: #f0f2ef;
  font-family: var(--display);
  font-size: 22px;
  font-weight: 300;
  letter-spacing: -0.01em;
}

.footer__contact span {
  line-height: 1.7;
  color: #7d8483;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: #6b7271;
  text-transform: uppercase;
}

.footer__bottom a:hover {
  color: #d9dcd9;
}

/* ---------- 18. Inner page hero ---------- */
.page-hero {
  padding: calc(var(--header) + 76px) 0 64px;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.page-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  gap: 48px;
  align-items: end;
}

.page-hero h1 {
  margin-top: 24px;
  font-size: clamp(42px, 4.8vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.page-hero .lead {
  margin-top: 26px;
  max-width: 52ch;
}

.page-hero__aside {
  padding-bottom: 8px;
  text-align: right;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

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

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

/* ---------- 19. Product page ---------- */
.product-hero {
  padding: calc(var(--header) + 72px) 0 72px;
}

.product-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
}

.product-hero h1 {
  margin-top: 24px;
  font-size: clamp(44px, 5vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.product-hero .lead {
  margin-top: 26px;
  max-width: 44ch;
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 30px;
}

.kv {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 38px;
  border-top: 1px solid var(--line);
}

.kv div {
  padding: 16px 20px 0 0;
}

.kv dt {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.kv dd {
  margin: 4px 0 0;
  font-size: 14.5px;
}

.viewrow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.viewcard {
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: linear-gradient(180deg, var(--stage-a), var(--stage-b));
}

.viewcard img {
  width: 100%;
  height: auto;
}

.viewcard figcaption {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  background: var(--paper);
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.viewcard figcaption span:last-child {
  color: var(--muted-2);
}

/* interface table */
.itable {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}

.itable th {
  text-align: left;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted-2);
  padding: 14px 0;
  border-bottom: 1px solid var(--line-2);
}

.itable td {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  vertical-align: top;
}

.itable td:nth-child(2) {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--red);
}

.itable td:nth-child(3) {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

.itable td:last-child {
  color: var(--muted);
  font-size: 13px;
}

.table-note {
  margin-top: 18px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  padding-left: 14px;
  border-left: 2px solid var(--line-2);
}

/* code */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

.code {
  margin-top: 30px;
  background: #0e1112;
  border: 1px solid #1d2223;
  border-radius: var(--r);
  padding: 26px 28px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.95;
  color: #c6cfcb;
  tab-size: 2;
}

.code .k {
  color: var(--green);
}

.code .s {
  color: #e9c97e;
}

.code .n {
  color: #86b9ff;
}

.code .c {
  color: #5f6a66;
}

.code__cap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.sensor-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}

.sensor {
  background: var(--paper);
  padding: 24px;
}

.sensor .mono {
  color: var(--muted-2);
  font-size: 9.5px;
}

.sensor strong {
  display: block;
  margin-top: 26px;
  font-family: var(--display);
  font-size: 20px;
  font-weight: 300;
  letter-spacing: -0.01em;
}

.sensor span {
  font-size: 12.5px;
  color: var(--muted);
}

/* spec dl */
.specdl {
  border-top: 1px solid var(--line);
}

.specdl div {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.specdl dt {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.specdl dd {
  font-size: 14.5px;
}

.specdl .badge {
  height: 22px;
  font-size: 9px;
}

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

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

.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  font-weight: 400;
  letter-spacing: -0.005em;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary .plus {
  position: relative;
  width: 16px;
  height: 16px;
  flex: none;
  color: var(--muted);
}

.faq summary .plus::before,
.faq summary .plus::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform 0.35s var(--ease), opacity 0.3s;
}

.faq summary .plus::before {
  left: 0;
  top: 7.5px;
  width: 16px;
  height: 1px;
}

.faq summary .plus::after {
  left: 7.5px;
  top: 0;
  width: 1px;
  height: 16px;
}

.faq details[open] summary .plus::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq details[open] summary {
  color: var(--red);
}

.faq__body {
  padding: 0 0 26px;
  max-width: 72ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 20. Plaza filters ---------- */
.filterbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.filterbar .count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--muted-2);
  text-transform: uppercase;
}

.filter {
  height: 36px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  font-size: 12.5px;
  color: var(--ink-2);
  transition: all 0.3s var(--ease);
}

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

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

.card[hidden] {
  display: none;
}

/* steps for reproduce */
.flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.flow__step {
  padding: 32px 28px 34px;
  border-left: 1px solid var(--line);
}

.flow__step:first-child {
  border-left: 0;
  padding-left: 0;
}

.flow__step .mono {
  color: var(--red);
  font-size: 10px;
}

.flow__step h3 {
  margin-top: 34px;
  font-size: 17px;
  font-weight: 400;
}

.flow__step p {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 21. About ---------- */
.about-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
  gap: clamp(36px, 6vw, 96px);
  align-items: start;
}

.about-intro__text p {
  font-size: 17px;
  line-height: 1.95;
  color: var(--ink-2);
  text-wrap: pretty;
}

.about-intro__text p + p {
  margin-top: 20px;
  color: var(--muted);
  font-size: 15.5px;
}

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

.factlist div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.factlist dt {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
  padding-top: 3px;
}

.factlist dd {
  text-align: right;
  color: var(--ink-2);
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pillar {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--white);
}

.pillar .mono {
  color: var(--red);
  font-size: 9.5px;
}

.pillar h3 {
  margin-top: 46px;
  font-size: 20px;
  font-weight: 400;
}

.pillar p {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

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

.tl {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) auto;
  gap: 24px;
  align-items: baseline;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.tl dt {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.tl dd {
  margin: 0;
}

.tl h3 {
  font-size: 18px;
  font-weight: 400;
}

.tl p {
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--muted);
}

/* contact */
.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}

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

.contact__row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.contact__row .mono {
  color: var(--muted-2);
  font-size: 9.5px;
  padding-top: 4px;
}

.contact__row strong {
  display: block;
  font-family: var(--display);
  font-size: 20px;
  font-weight: 300;
  letter-spacing: -0.01em;
}

.contact__row span {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.contact__row a.tel {
  font-family: var(--display);
  font-size: 26px;
  font-weight: 300;
  letter-spacing: -0.02em;
}

.contact__row a.tel:hover {
  color: var(--red);
}

.form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field--full {
  grid-column: 1 / -1;
}

.field label {
  font-size: 12.5px;
  color: var(--ink-2);
}

.field label .opt {
  color: var(--muted-2);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line-2);
  border-radius: var(--r-sm);
  background: var(--white);
  font: inherit;
  font-size: 14.5px;
  color: var(--ink);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
  appearance: none;
}

.field select {
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 20px) 21px, calc(100% - 15px) 21px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

.field textarea {
  height: 128px;
  padding: 12px 14px;
  resize: vertical;
  line-height: 1.7;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(20, 20, 20, 0.06);
}

.field.is-invalid input,
.field.is-invalid select,
.field.is-invalid textarea {
  border-color: var(--red);
}

.field__error {
  display: none;
  font-size: 11.5px;
  color: var(--red);
}

.field.is-invalid .field__error {
  display: block;
}

.consent {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

.consent input {
  width: 15px;
  height: 15px;
  margin-top: 2px;
  accent-color: var(--red);
  flex: none;
}

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

.form__ok {
  display: none;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(79, 191, 109, 0.35);
  background: rgba(79, 191, 109, 0.07);
  font-size: 13px;
  line-height: 1.7;
  color: #2f7f45;
}

.form__ok.is-visible {
  display: flex;
}

.form__ok svg {
  width: 18px;
  height: 18px;
  flex: none;
  margin-top: 1px;
}

/* ---------- 22. Modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 130;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.3s var(--ease), visibility 0.3s;
}

.modal.is-open {
  visibility: visible;
  opacity: 1;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 12, 13, 0.58);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.modal__panel {
  position: relative;
  width: min(860px, 100%);
  max-height: min(86vh, 900px);
  overflow: auto;
  background: var(--paper);
  border-radius: var(--r-lg);
  box-shadow: 0 40px 100px -40px rgba(0, 0, 0, 0.5);
  transform: translateY(14px) scale(0.995);
  transition: transform 0.4s var(--ease-out);
  overscroll-behavior: contain;
}

.modal.is-open .modal__panel {
  transform: none;
}

.modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 6;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: background 0.25s, transform 0.25s;
}

.modal__close:hover {
  background: #fff;
  transform: rotate(90deg);
}

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

.modal__cover {
  position: relative;
  height: 220px;
  background: #0e1112;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.modal__cover svg {
  width: 128px;
  color: var(--green);
  position: relative;
  z-index: 1;
}

.modal__cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 15%, transparent 72%);
  mask-image: radial-gradient(circle at 50% 50%, #000 15%, transparent 72%);
}

.modal__body {
  padding: 32px 40px 44px;
}

.modal__body h2 {
  margin-top: 14px;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.25;
}

.modal__body .lead {
  margin-top: 14px;
  font-size: 15px;
}

.modal__section {
  margin-top: 32px;
}

.modal__section > .mono {
  display: block;
  color: var(--muted-2);
  font-size: 10px;
  margin-bottom: 14px;
}

.modal__section ol {
  counter-reset: s;
  display: grid;
  gap: 12px;
  font-size: 14px;
  color: var(--ink-2);
}

.modal__section ol li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  line-height: 1.7;
}

.modal__section ol li::before {
  counter-increment: s;
  content: counter(s, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--red);
  padding-top: 3px;
}

.modal__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.modal__note {
  margin-top: 30px;
  padding: 14px 16px;
  border-left: 2px solid var(--line-2);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* article modal */
.article {
  padding: 8px 40px 44px;
}

.article h2 {
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.3;
}

.article__meta {
  display: flex;
  gap: 14px;
  align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-top: 14px;
}

.article p {
  margin-top: 18px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-2);
}

.article p:first-of-type {
  margin-top: 26px;
  font-size: 16.5px;
  color: var(--ink);
}

.article h3 {
  margin-top: 30px;
  font-size: 19px;
  font-weight: 400;
}

.article ul {
  margin-top: 12px;
  display: grid;
  gap: 8px;
}

.article ul li {
  font-size: 14.5px;
  color: var(--ink-2);
  padding-left: 18px;
  position: relative;
  line-height: 1.75;
}

.article ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: var(--red);
}

/* ---------- 23. Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.85s var(--ease-out), transform 0.85s var(--ease-out);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}

[data-reveal].is-in {
  opacity: 1;
  transform: 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;
  }
}

/* ---------- 24. Device screen mock ---------- */
.screenbox {
  width: 100%;
  max-width: 520px;
  margin-inline: auto;
  background: #101314;
  border-radius: 24px;
  padding: 14px;
  box-shadow: 0 50px 90px -60px rgba(0, 0, 0, 0.9),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.screenbox__display {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: 14px;
  background: #040705;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 24px;
  color: var(--green);
  overflow: hidden;
  box-shadow: inset 0 0 60px rgba(140, 240, 164, 0.07);
}

.screenbox__display::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    180deg,
    transparent 0 2px,
    rgba(0, 0, 0, 0.3) 2px 3px
  );
  opacity: 0.5;
  pointer-events: none;
}

.pixelface {
  width: 44%;
  height: auto;
  filter: drop-shadow(0 0 14px rgba(140, 240, 164, 0.35));
}

.screenbox__row {
  display: flex;
  gap: 28px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(140, 240, 164, 0.55);
}

.screenbox__code {
  display: grid;
  gap: 2px;
  text-align: center;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: rgba(214, 255, 222, 0.82);
}

.screenbox__code .ok {
  color: var(--green);
}

.cursor {
  display: inline-block;
  width: 6px;
  height: 10px;
  margin-left: 5px;
  vertical-align: -1px;
  background: var(--green);
  animation: blink 1.2s steps(1) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.screenbox__foot {
  display: flex;
  justify-content: space-between;
  padding: 12px 6px 2px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #6b7370;
}

.states {
  border-top: 1px solid rgba(255, 255, 255, 0.13);
}

.states li {
  display: flex;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  font-size: 13.5px;
  line-height: 1.6;
  color: #c3c9c7;
}

.states li span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--green);
  padding-top: 3px;
  flex: none;
}

/* ---------- 25. Responsive ---------- */
@media (max-width: 1100px) {
  .nav a {
    padding: 9px 11px;
    font-size: 13.5px;
  }
  .brand__suffix {
    display: none;
  }
  .footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
  .footer__contact {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    align-items: baseline;
  }
}

@media (max-width: 960px) {
  :root {
    --header: 64px;
  }
  .section,
  .band,
  .cta {
    padding: 88px 0;
  }
  .nav,
  .header__cta {
    display: none;
  }
  .burger {
    display: block;
  }
  .hero {
    padding-top: calc(var(--header) + 52px);
  }
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-bottom: 40px;
  }
  .hero__stage {
    max-width: 560px;
    margin-inline: auto;
    width: 100%;
  }
  .hero__caption {
    text-align: left;
  }
  .specbar {
    grid-template-columns: 1fr 1fr;
  }
  .specbar__item {
    padding: 24px 24px 26px;
    border-top: 1px solid var(--line);
  }
  .specbar__item:nth-child(1),
  .specbar__item:nth-child(2) {
    border-top: 0;
  }
  .specbar__item:nth-child(2n + 1) {
    border-left: 0;
    padding-left: 0;
  }
  .sec-head__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .sec-head__lead {
    max-width: 56ch;
  }
  .shift {
    grid-template-columns: 1fr;
  }
  .shift__col {
    padding: 34px 28px;
  }
  .shift__col + .shift__col {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .caps {
    grid-template-columns: repeat(2, 1fr);
  }
  .cap h3 {
    margin-top: 38px;
  }
  .hw {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hw__stage {
    max-width: 560px;
    margin-inline: auto;
  }
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .modules {
    grid-template-columns: 1fr;
  }
  .appsplit {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .phone-wrap {
    order: 2;
    padding: 32px;
  }
  .quote {
    grid-template-columns: 84px minmax(0, 1fr);
    padding: 56px 0;
  }
  .quote__avatar {
    width: 84px;
  }
  .newsitem {
    grid-template-columns: 84px minmax(0, 1fr) auto;
    gap: 16px;
  }
  .newsitem__cat {
    display: none;
  }
  .feature {
    grid-template-columns: 1fr;
  }
  .feature__media {
    min-height: 240px;
  }
  .feature__body {
    padding: 32px 28px;
  }
  .page-hero__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .page-hero__aside {
    display: none;
  }
  .product-hero {
    padding-top: calc(var(--header) + 52px);
  }
  .product-hero__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .product-hero__media .stage {
    max-width: 560px;
    margin-inline: auto;
  }
  .split {
    grid-template-columns: 1fr;
  }
  .viewrow {
    grid-template-columns: 1fr;
  }
  .viewcard {
    display: grid;
    grid-template-columns: 180px 1fr;
    align-items: center;
  }
  .viewcard img {
    height: 100%;
    object-fit: cover;
  }
  .flow {
    grid-template-columns: 1fr 1fr;
  }
  .flow__step:nth-child(3) {
    border-left: 0;
    padding-left: 0;
  }
  .flow__step {
    border-top: 1px solid var(--line);
  }
  .flow__step:nth-child(1),
  .flow__step:nth-child(2) {
    border-top: 0;
  }
  .about-intro {
    grid-template-columns: 1fr;
  }
  .pillars {
    grid-template-columns: 1fr;
  }
  .contact {
    grid-template-columns: 1fr;
  }
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 700px) {
  .container,
  .container--narrow {
    width: min(var(--container), 100% - 36px);
  }
  .page-hero h1 {
    font-size: clamp(33px, 8.8vw, 44px);
  }
  .section,
  .band,
  .cta {
    padding: 68px 0;
  }
  .caps {
    grid-template-columns: 1fr;
  }
  .cap {
    padding: 26px 24px 30px;
  }
  .cap h3 {
    margin-top: 30px;
  }
  .cards {
    grid-template-columns: 1fr;
  }
  .specbar {
    grid-template-columns: 1fr 1fr;
  }
  .specbar__item {
    padding: 22px 18px 24px;
  }
  .specbar__num {
    font-size: 32px;
  }
  .quote {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .tl {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .tl dt {
    color: var(--muted-2);
  }
  .form {
    grid-template-columns: 1fr;
  }
  .contact__row {
    grid-template-columns: 80px 1fr;
  }
  .modal__body {
    padding: 26px 22px 34px;
  }
  .article {
    padding: 6px 22px 32px;
  }
  .modal__cover {
    height: 170px;
  }
  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer__contact {
    display: grid;
  }
  .flow {
    grid-template-columns: 1fr;
  }
  .flow__step {
    border-left: 0;
    padding-left: 0;
  }
  .flow__step:nth-child(2) {
    border-top: 1px solid var(--line);
  }
  .newsitem {
    grid-template-columns: 1fr auto;
    gap: 6px 16px;
    padding: 20px 0;
  }
  .newsitem__date {
    grid-column: 1 / -1;
    order: -1;
  }
  .newsitem__title {
    font-size: 15.5px;
    line-height: 1.5;
  }
  .viewcard {
    grid-template-columns: 130px 1fr;
  }
  .itable th:nth-child(4),
  .itable td:nth-child(4),
  .itable th:nth-child(5),
  .itable td:nth-child(5) {
    display: none;
  }
  .itable td {
    font-size: 13.5px;
  }
  .specdl div {
    grid-template-columns: 1fr auto;
    gap: 8px;
  }
  .specdl dt {
    grid-column: 1 / -1;
  }
  .feature__body {
    padding: 28px 22px;
  }
  .hero__actions .btn {
    flex: 1;
  }
  .cta h2 {
    max-width: 100%;
  }
  .footer__bottom {
    gap: 8px;
  }
}

@media (max-width: 420px) {
  .specbar {
    grid-template-columns: 1fr;
  }
  .specbar__item {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--line);
  }
  .specbar__item:first-child {
    border-top: 0;
  }
  .hero__meta {
    font-size: 11.5px;
  }
}


/* 隐藏入口：备案号后面的透明按钮，点击进入正式首页 */
.gate__legal .gate__secret{
  display: inline-block;
  width: 22px;
  height: 22px;
  margin-left: 4px;
  vertical-align: middle;
  opacity: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.gate__legal .gate__secret:hover,
.gate__legal .gate__secret:focus{ opacity: 0; outline: none; }