/* =========================================================
   深界科技 · DEEPREALM TECH
   Corporate website stylesheet
   ========================================================= */

/* ---------- 01. Design tokens ---------- */
:root {
  --ink-950: #06121b;
  --ink-900: #081a27;
  --ink-850: #0a2130;
  --ink-800: #0d2939;
  --paper: #f2f4ee;
  --paper-deep: #e8ede6;
  --white: #ffffff;

  --aqua: #66f5d4;
  --aqua-soft: #b9f8e8;
  --aqua-deep: #17b595;
  --coral: #ff8a5b;
  --ice: #9cc0ff;
  --lime: #bcef91;

  --text: #10232d;
  --muted: #5c6e73;
  --muted-light: rgba(255, 255, 255, 0.52);

  --line: rgba(16, 35, 45, 0.13);
  --line-strong: rgba(16, 35, 45, 0.24);
  --line-light: rgba(255, 255, 255, 0.12);
  --line-light-strong: rgba(255, 255, 255, 0.22);

  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-en: "Helvetica Neue", "Arial", "Segoe UI", var(--font-sans);
  --font-mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", "Consolas", "Liberation Mono", monospace;

  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 14px;

  --ease-out: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-soft: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--ink-950);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.menu-open {
  overflow: hidden;
}

img,
svg {
  display: block;
}

img {
  max-width: 100%;
  height: auto;
}

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

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

button {
  cursor: pointer;
}

p,
h1,
h2,
h3,
ul,
blockquote {
  margin-top: 0;
}

ul {
  padding-left: 0;
  list-style: none;
}

::selection {
  background: var(--aqua);
  color: var(--ink-950);
}

:focus-visible {
  outline: 2px solid var(--aqua-deep);
  outline-offset: 4px;
}

.svg-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.icon {
  width: 1em;
  height: 1em;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
  overflow: visible;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 12px 18px;
  border-radius: 8px;
  background: var(--aqua);
  color: var(--ink-950);
  font-size: 0.85rem;
  font-weight: 700;
  transform: translateY(-150%);
  transition: transform 0.25s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.page-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 110;
  width: 100%;
  height: 2px;
  pointer-events: none;
}

.page-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--aqua), var(--coral));
  box-shadow: 0 0 14px rgba(102, 245, 212, 0.5);
  transition: width 0.12s linear;
}

.container {
  width: min(1360px, calc(100% - clamp(40px, 8vw, 128px)));
  margin-inline: auto;
}

section {
  scroll-margin-top: 90px;
}

/* ---------- 03. Shared typography & components ---------- */
.kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 24px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1;
  text-transform: uppercase;
}

.kicker span {
  display: inline-grid;
  place-items: center;
  width: 27px;
  height: 27px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font-size: 0.55rem;
  letter-spacing: 0;
  color: var(--text);
}

.kicker::after {
  content: "";
  width: 38px;
  height: 1px;
  background: currentColor;
  opacity: 0.35;
}

.kicker--light {
  color: rgba(255, 255, 255, 0.48);
}

.kicker--light span {
  color: rgba(255, 255, 255, 0.8);
  border-color: rgba(255, 255, 255, 0.25);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.72fr);
  align-items: end;
  gap: clamp(44px, 7vw, 110px);
  margin-bottom: clamp(52px, 6vw, 76px);
}

.section-head h2 {
  margin: 0;
  font-size: clamp(2.3rem, 4.45vw, 4.45rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.16;
}

.section-intro {
  max-width: 470px;
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.9;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 52px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  transition: transform 0.35s var(--ease-soft), background-color 0.35s ease, border-color 0.35s ease, color 0.35s ease, box-shadow 0.35s ease;
}

.btn .icon {
  font-size: 1.02rem;
  transition: transform 0.35s var(--ease-soft);
}

.btn:hover .icon {
  transform: translate(2px, -2px);
}

.btn--primary {
  background: var(--aqua);
  color: var(--ink-950);
  box-shadow: 0 12px 34px rgba(48, 220, 184, 0.18);
}

.btn--primary .icon {
  transform: rotate(-90deg);
}

.btn--primary:hover {
  background: #8dffe4;
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(48, 220, 184, 0.26);
}

.btn--primary:hover .icon {
  transform: rotate(-90deg) translate(2px, -2px);
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.035);
  color: var(--white);
}

.btn--ghost:hover {
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.btn--dark {
  background: var(--ink-950);
  color: var(--white);
  padding-inline: 26px;
}

.btn--dark:hover {
  background: var(--ink-800);
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(6, 18, 27, 0.18);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 0 5px;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  background: none;
  color: var(--text);
  font-size: 0.84rem;
  font-weight: 600;
  line-height: 1.2;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.text-link .icon {
  font-size: 0.95rem;
  transition: transform 0.35s var(--ease-soft);
}

.text-link:hover {
  color: var(--aqua-deep);
  border-color: var(--aqua-deep);
}

.text-link:hover .icon {
  transform: translateX(4px);
}

.status-dot {
  position: relative;
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--aqua);
  box-shadow: 0 0 0 4px rgba(102, 245, 212, 0.1);
}

.status-dot::after {
  content: "";
  position: absolute;
  inset: -5px;
  border: 1px solid rgba(102, 245, 212, 0.4);
  border-radius: inherit;
  animation: statusPulse 2.8s ease-out infinite;
}

/* ---------- 04. Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  width: 100%;
  color: var(--white);
  border-bottom: 1px solid transparent;
  transition: background-color 0.4s ease, border-color 0.4s ease, backdrop-filter 0.4s ease;
}

.site-header.is-scrolled {
  background: rgba(4, 16, 24, 0.8);
  border-bottom-color: rgba(255, 255, 255, 0.08);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

body.menu-open .site-header {
  background: transparent;
  border-bottom-color: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.nav {
  display: flex;
  align-items: center;
  height: 86px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  flex: none;
}

.brand-mark {
  width: 39px;
  height: 39px;
  color: #0b2331;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
  transition: transform 0.4s var(--ease-soft);
}

.brand:hover .brand-mark {
  transform: rotate(-4deg) scale(1.04);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-text strong {
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  line-height: 1.1;
}

.brand-text span {
  color: rgba(255, 255, 255, 0.52);
  font-family: var(--font-en);
  font-size: 0.53rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  line-height: 1;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(24px, 2.6vw, 40px);
  margin-left: auto;
  margin-right: clamp(28px, 3.2vw, 48px);
}

.nav-link {
  position: relative;
  padding: 8px 0;
  color: rgba(255, 255, 255, 0.64);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 1px;
  background: var(--aqua);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease-soft);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--white);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 19px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  color: var(--white);
  font-size: 0.76rem;
  font-weight: 500;
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.nav-cta .icon {
  font-size: 0.9rem;
  transition: transform 0.3s var(--ease-soft);
}

.nav-cta:hover {
  border-color: var(--aqua);
  background: var(--aqua);
  color: var(--ink-950);
}

.nav-cta:hover .icon {
  transform: translate(2px, -2px);
}

.menu-toggle {
  display: none;
  position: relative;
  z-index: 102;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  background: transparent;
  color: var(--white);
}

.menu-toggle span {
  position: absolute;
  left: 12px;
  width: 18px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.35s var(--ease-soft), opacity 0.25s ease;
}

.menu-toggle span:first-child {
  top: 17px;
}

.menu-toggle span:last-child {
  top: 24px;
}

.menu-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* ---------- 05. Mobile menu ---------- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 95;
  visibility: hidden;
  overflow-y: auto;
  background: var(--ink-950);
  opacity: 0;
  transform: translateY(-14px);
  transition: opacity 0.45s var(--ease-soft), transform 0.45s var(--ease-soft), visibility 0.45s;
}

.mobile-menu::before {
  content: "";
  position: absolute;
  top: 10%;
  right: -20%;
  width: 70vw;
  height: 70vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(102, 245, 212, 0.12), transparent 62%);
  pointer-events: none;
}

.mobile-menu.is-open {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu__inner {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 100%;
  padding: 112px clamp(22px, 7vw, 50px) 38px;
}

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

.mobile-nav a {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--white);
  font-size: clamp(1.8rem, 7vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.1;
  opacity: 0;
  transform: translateY(16px);
}

.mobile-menu.is-open .mobile-nav a {
  animation: menuItemIn 0.6s var(--ease-out) forwards;
}

.mobile-menu.is-open .mobile-nav a:nth-child(1) { animation-delay: 0.08s; }
.mobile-menu.is-open .mobile-nav a:nth-child(2) { animation-delay: 0.14s; }
.mobile-menu.is-open .mobile-nav a:nth-child(3) { animation-delay: 0.2s; }
.mobile-menu.is-open .mobile-nav a:nth-child(4) { animation-delay: 0.26s; }

.mobile-nav a span {
  width: 22px;
  color: var(--aqua);
  font-family: var(--font-mono);
  font-size: 0.56rem;
  font-weight: 400;
  letter-spacing: 0.08em;
}

.mobile-nav a .icon {
  margin-left: auto;
  color: rgba(255, 255, 255, 0.34);
  font-size: 1rem;
}

.mobile-menu__foot {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  padding-top: 36px;
}

.mobile-menu__foot p {
  margin: 0;
  color: rgba(255, 255, 255, 0.38);
  font-size: 0.72rem;
  line-height: 1.7;
}

.mobile-menu__foot a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--aqua);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.02em;
}

/* ---------- 06. Hero ---------- */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100svh;
  padding: 86px 0 0;
  overflow: hidden;
  background: var(--ink-950);
  color: var(--white);
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(circle at 75% 36%, rgba(29, 222, 186, 0.1), transparent 28%),
    linear-gradient(90deg, rgba(6, 18, 27, 0.98) 0%, rgba(6, 18, 27, 0.86) 34%, rgba(6, 18, 27, 0.18) 70%, rgba(6, 18, 27, 0.25) 100%);
  pointer-events: none;
}

.hero-art {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 0;
  width: 70%;
  height: 100%;
  overflow: hidden;
  transform: translate3d(var(--mx, 0px), var(--my, 0px), 0);
  transition: transform 0.35s ease-out;
  will-change: transform;
}

.hero-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% center;
  opacity: 0.92;
  transform: scale(1.045);
  animation: heroDrift 18s ease-in-out infinite alternate;
}

.hero-art::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, var(--ink-950) 0%, rgba(6, 18, 27, 0.72) 24%, rgba(6, 18, 27, 0.08) 61%, rgba(6, 18, 27, 0.08) 100%),
    linear-gradient(0deg, var(--ink-950) 0%, rgba(6, 18, 27, 0.5) 12%, transparent 35%),
    linear-gradient(180deg, rgba(6, 18, 27, 0.85) 0%, transparent 28%);
}

.hero-art::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background: radial-gradient(circle at 61% 45%, transparent 0%, transparent 36%, rgba(6, 18, 27, 0.14) 58%, rgba(6, 18, 27, 0.7) 100%);
}

.hero-glow {
  position: absolute;
  top: 15%;
  left: 32%;
  z-index: 0;
  width: 36vw;
  height: 36vw;
  border-radius: 50%;
  background: rgba(45, 231, 197, 0.055);
  filter: blur(80px);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: flex;
  flex: 1;
  align-items: center;
  padding-top: clamp(58px, 8vh, 92px);
  padding-bottom: clamp(48px, 6vh, 72px);
}

.hero-copy {
  width: min(760px, 62%);
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 28px;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  line-height: 1.4;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeUp 0.9s var(--ease-out) 0.05s forwards;
}

.hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(3.5rem, 6.6vw, 6.6rem);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 1.04;
}

.hero-line {
  display: block;
  overflow: hidden;
  padding-bottom: 0.075em;
}

.hero-line > span {
  display: block;
  transform: translateY(118%);
  animation: heroLineIn 1.15s var(--ease-out) forwards;
}

.hero-line:nth-child(1) > span {
  animation-delay: 0.12s;
}

.hero-line:nth-child(2) > span {
  animation-delay: 0.24s;
}

.hero h1 em {
  position: relative;
  display: inline-block;
  color: var(--aqua);
  font-style: normal;
  text-shadow: 0 0 50px rgba(102, 245, 212, 0.2);
}

.hero h1 em::after {
  content: "";
  position: absolute;
  right: 0.04em;
  bottom: 0.025em;
  left: 0.04em;
  height: 0.045em;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--aqua), rgba(102, 245, 212, 0));
  transform: scaleX(0);
  transform-origin: left;
  animation: lineGrow 1.1s var(--ease-out) 1.05s forwards;
}

.hero-lead {
  max-width: 560px;
  margin: 30px 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: clamp(0.94rem, 1.05vw, 1.04rem);
  line-height: 1.9;
  letter-spacing: 0.005em;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) 0.5s forwards;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) 0.66s forwards;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 680px;
  margin: clamp(48px, 7vh, 70px) 0 0;
  padding: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
  list-style: none;
  opacity: 0;
  animation: fadeUp 1s var(--ease-out) 0.8s forwards;
}

.hero-stats li {
  min-width: 0;
  padding: 18px 20px 0 0;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stats li:not(:first-child) {
  padding-left: 20px;
}

.hero-stats li:last-child {
  border-right: 0;
}

.hero-stats strong {
  display: block;
  margin-bottom: 5px;
  color: var(--white);
  font-family: var(--font-en);
  font-size: clamp(1.2rem, 1.5vw, 1.5rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
}

.hero-stats span {
  display: block;
  color: rgba(255, 255, 255, 0.48);
  font-size: 0.68rem;
  letter-spacing: 0.02em;
  line-height: 1.5;
}

.hero-side {
  position: absolute;
  top: 50%;
  right: 19px;
  z-index: 2;
  color: rgba(255, 255, 255, 0.28);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.25em;
  writing-mode: vertical-rl;
  transform: translateY(-50%);
  opacity: 0;
  animation: fadeIn 1s ease 1.2s forwards;
}

.hero-foot {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 25px;
  padding-bottom: 27px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  opacity: 0;
  animation: fadeIn 1s ease 1.1s forwards;
}

.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  color: rgba(255, 255, 255, 0.42);
  font-family: var(--font-mono);
  font-size: 0.53rem;
  letter-spacing: 0.12em;
  line-height: 1.65;
  text-transform: uppercase;
  transition: color 0.3s ease;
}

.scroll-cue:hover {
  color: rgba(255, 255, 255, 0.8);
}

.scroll-cue__line {
  position: relative;
  display: block;
  width: 1px;
  height: 32px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.16);
}

.scroll-cue__line i {
  position: absolute;
  top: -40%;
  left: 0;
  width: 1px;
  height: 40%;
  background: var(--aqua);
  animation: scrollLine 2.2s ease-in-out infinite;
}

.hero-foot__index {
  color: rgba(255, 255, 255, 0.28);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.16em;
}

/* ---------- 07. Signal marquee ---------- */
.signal-band {
  position: relative;
  z-index: 3;
  overflow: hidden;
  padding: 15px 0;
  background: var(--aqua);
  color: var(--ink-950);
}

.signal-track {
  display: flex;
  width: max-content;
  animation: marquee 34s linear infinite;
}

.signal-band:hover .signal-track {
  animation-play-state: paused;
}

.signal-group {
  display: flex;
  align-items: center;
  padding-right: 42px;
}

.signal-group span {
  display: flex;
  align-items: center;
  gap: 42px;
  white-space: nowrap;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.signal-group span::after {
  content: "✦";
  font-size: 0.72rem;
  font-weight: 400;
  opacity: 0.55;
}

/* ---------- 08. Manifesto ---------- */
.manifesto {
  position: relative;
  padding: clamp(100px, 11.5vw, 160px) 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 92% 4%, rgba(102, 245, 212, 0.21), transparent 31%),
    var(--paper);
}

.manifesto::before {
  content: "";
  position: absolute;
  top: 44%;
  left: -140px;
  width: 280px;
  height: 280px;
  border: 1px solid rgba(16, 35, 45, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.manifesto h2 {
  max-width: 920px;
}

.manifesto-copy {
  padding-bottom: 7px;
}

.manifesto-copy p {
  max-width: 470px;
  margin-bottom: 17px;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.92;
}

.manifesto-copy p + p {
  margin-bottom: 26px;
  color: var(--text);
  font-size: 0.88rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(63px, 8vw, 92px);
  border-top: 1px solid var(--line-strong);
}

.stat {
  padding: 27px 26px 4px 0;
  border-right: 1px solid var(--line);
}

.stat:not(:first-child) {
  padding-left: 26px;
}

.stat:last-child {
  border-right: 0;
}

.stat strong {
  display: block;
  margin-bottom: 9px;
  color: var(--ink-950);
  font-family: var(--font-en);
  font-size: clamp(2.55rem, 3.7vw, 3.55rem);
  font-weight: 500;
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 0.7rem;
  letter-spacing: 0.03em;
}

/* ---------- 09. Products ---------- */
.products {
  position: relative;
  padding: clamp(100px, 11.5vw, 168px) 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 4%, rgba(23, 181, 149, 0.12), transparent 29%),
    var(--ink-950);
  color: var(--white);
}

.products::after {
  content: "";
  position: absolute;
  right: -160px;
  bottom: 6%;
  width: 420px;
  height: 420px;
  border: 1px solid rgba(102, 245, 212, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.grid-overlay {
  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: 86px 86px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 68%);
  mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 68%);
  opacity: 0.45;
  pointer-events: none;
}

.products .container {
  position: relative;
  z-index: 2;
}

.products h2 {
  color: var(--white);
}

.products .section-intro {
  color: var(--muted-light);
}

.section-head--products {
  align-items: end;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 20px;
}

.product-card {
  --accent: var(--aqua);
  position: relative;
  display: flex;
  flex-direction: column;
  grid-column: span 6;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.052), rgba(255, 255, 255, 0.016));
  transition: transform 0.5s var(--ease-soft), border-color 0.45s ease, background-color 0.45s ease, box-shadow 0.45s ease;
}

.product-card:nth-child(1),
.product-card:nth-child(4) {
  grid-column: span 7;
}

.product-card:nth-child(2),
.product-card:nth-child(3) {
  grid-column: span 5;
}

.product-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 28px;
  left: 28px;
  z-index: 3;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.44;
  pointer-events: none;
}

.product-card:hover,
.product-card:focus-within {
  transform: translateY(-6px);
  border-color: var(--line-light-strong);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.022));
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.28);
}

.product-card--coding {
  --accent: var(--aqua);
}

.product-card--quiz {
  --accent: var(--ice);
}

.product-card--ai {
  --accent: var(--coral);
}

.product-card--science {
  --accent: var(--lime);
}

.product-media {
  position: relative;
  flex: none;
  height: clamp(240px, 24vw, 340px);
  overflow: hidden;
  background: var(--ink-900);
}

.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.94;
  transition: transform 1.1s var(--ease-out), opacity 0.5s ease;
}

.product-card:hover .product-media img {
  transform: scale(1.045);
  opacity: 1;
}

.product-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 18, 27, 0.22) 0%, transparent 28%, transparent 64%, rgba(6, 18, 27, 0.76) 100%),
    linear-gradient(90deg, rgba(6, 18, 27, 0.28), transparent 45%);
  pointer-events: none;
}

.product-index {
  position: absolute;
  top: 18px;
  left: 20px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 27px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: rgba(4, 16, 24, 0.38);
  color: rgba(255, 255, 255, 0.88);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.product-float {
  position: absolute;
  right: 20px;
  bottom: 18px;
  z-index: 2;
  color: rgba(255, 255, 255, 0.8);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.14em;
  line-height: 1;
}

.product-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 26px 30px 28px;
}

.product-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.product-name {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
}

.product-en {
  color: rgba(255, 255, 255, 0.27);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.16em;
  text-align: right;
}

.product-body h3 {
  margin: 0 0 13px;
  color: var(--white);
  font-size: clamp(1.48rem, 2.2vw, 2.18rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.25;
}

.product-body p {
  max-width: 580px;
  margin: 0 0 23px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 0.88rem;
  line-height: 1.85;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: auto 0 23px;
}

.tag-list li {
  padding: 5px 10px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.025);
  color: rgba(255, 255, 255, 0.64);
  font-size: 0.66rem;
  letter-spacing: 0.03em;
  line-height: 1.4;
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 17px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.card-link {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-width: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.79rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

.card-link > span:first-child {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  min-width: 0;
  white-space: nowrap;
}

.card-link__domain {
  color: rgba(255, 255, 255, 0.4);
  font-family: var(--font-mono);
  font-size: 0.63rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  transition: color 0.3s ease;
}

.card-demo {
  flex: none;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.44);
  font-size: 0.66rem;
  line-height: 1.4;
  white-space: nowrap;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.card-demo:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.card-link__arrow {
  display: grid;
  flex: none;
  place-items: center;
  width: 35px;
  height: 35px;
  border: 1px solid rgba(255, 255, 255, 0.17);
  border-radius: 50%;
  transition: background-color 0.35s ease, border-color 0.35s ease, color 0.35s ease, transform 0.4s var(--ease-soft);
}

.card-link__arrow .icon {
  font-size: 0.9rem;
}

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

.card-link:hover .card-link__domain {
  color: rgba(255, 255, 255, 0.68);
}

.card-link:hover .card-link__arrow {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--ink-950);
  transform: rotate(45deg);
}

/* ---------- 10. Learning loop ---------- */
.loop {
  position: relative;
  padding: clamp(100px, 11.5vw, 160px) 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 8% 94%, rgba(23, 181, 149, 0.13), transparent 27%),
    var(--paper);
}

.loop::after {
  content: "LOOP";
  position: absolute;
  right: -18px;
  bottom: 20px;
  color: transparent;
  font-family: var(--font-en);
  font-size: clamp(6rem, 18vw, 17rem);
  font-weight: 700;
  letter-spacing: -0.08em;
  line-height: 1;
  -webkit-text-stroke: 1px rgba(16, 35, 45, 0.055);
  pointer-events: none;
}

.loop .container {
  position: relative;
  z-index: 2;
}

.loop-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 6px;
  border-top: 1px solid var(--line-strong);
}

.loop-step {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 32px 25px 10px 0;
  border-right: 1px solid var(--line);
}

.loop-step:not(:first-child) {
  padding-left: 25px;
}

.loop-step:last-child {
  border-right: 0;
  padding-right: 0;
}

.loop-step::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border: 1px solid var(--aqua-deep);
  border-radius: 50%;
  background: var(--paper);
  transition: background-color 0.35s ease, box-shadow 0.35s ease;
}

.loop-step:not(:first-child)::before {
  left: 25px;
}

.loop-step:hover::before {
  background: var(--aqua-deep);
  box-shadow: 0 0 0 5px rgba(23, 181, 149, 0.1);
}

.loop-step__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 40px;
}

.loop-step__num {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  letter-spacing: 0.13em;
}

.loop-step__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--text);
  background: rgba(255, 255, 255, 0.36);
  transition: background-color 0.35s ease, color 0.35s ease, border-color 0.35s ease, transform 0.4s var(--ease-soft);
}

.loop-step__icon .icon {
  font-size: 1.05rem;
}

.loop-step:hover .loop-step__icon {
  border-color: var(--ink-950);
  background: var(--ink-950);
  color: var(--aqua);
  transform: rotate(-6deg);
}

.loop-verb {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 22px;
  color: var(--ink-950);
  font-size: clamp(3.3rem, 4.8vw, 4.8rem);
  font-weight: 700;
  letter-spacing: -0.08em;
  line-height: 0.9;
}

.loop-verb span {
  padding-bottom: 8px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.48rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.loop-step h3 {
  margin: 0 0 10px;
  color: var(--ink-950);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.loop-step p {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.85;
}

.loop-step__tag {
  align-self: flex-start;
  margin-top: auto;
  padding: 5px 9px;
  border: 1px solid rgba(23, 181, 149, 0.22);
  border-radius: 999px;
  color: var(--aqua-deep);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.loop-note {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: clamp(52px, 6vw, 74px);
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.loop-note__line {
  flex: none;
  width: 54px;
  height: 1px;
  background: var(--aqua-deep);
}

.loop-note p {
  flex: 1;
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.8;
}

.loop-note p strong {
  color: var(--text);
  font-weight: 600;
}

/* ---------- 11. About ---------- */
.about {
  position: relative;
  padding: clamp(100px, 11.5vw, 168px) 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 7% 88%, rgba(102, 245, 212, 0.09), transparent 28%),
    var(--ink-950);
  color: var(--white);
}

.about::before {
  content: "";
  position: absolute;
  top: 8%;
  right: -12%;
  width: 52vw;
  height: 52vw;
  border: 1px solid rgba(255, 255, 255, 0.045);
  border-radius: 50%;
  pointer-events: none;
}

.about .container {
  position: relative;
  z-index: 2;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(44px, 6vw, 84px);
  align-items: stretch;
}

.about-media {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-xl);
  background: var(--ink-850);
}

.about-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.92;
}

.about-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 18, 27, 0.05) 45%, rgba(6, 18, 27, 0.74) 100%),
    linear-gradient(90deg, rgba(6, 18, 27, 0.16), transparent 35%);
}

.about-caption {
  position: absolute;
  right: 24px;
  bottom: 21px;
  left: 24px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  color: rgba(255, 255, 255, 0.76);
  font-family: var(--font-mono);
  font-size: 0.53rem;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

.about-copy {
  align-self: center;
  padding: 17px 0;
}

.about-copy h2 {
  margin: 0 0 23px;
  color: var(--white);
  font-size: clamp(2.3rem, 3.75vw, 3.7rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.19;
}

.about-copy > p {
  max-width: 510px;
  margin-bottom: 14px;
  color: rgba(255, 255, 255, 0.52);
  font-size: 0.89rem;
  line-height: 1.9;
}

.value-list {
  margin-top: 31px;
  border-top: 1px solid var(--line-light);
}

.value-item {
  display: grid;
  grid-template-columns: 31px minmax(0, 1fr);
  gap: 16px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line-light);
}

.value-num {
  padding-top: 3px;
  color: var(--aqua);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.05em;
}

.value-item h3 {
  margin: 0 0 4px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.91rem;
  font-weight: 600;
}

.value-item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.76rem;
  line-height: 1.7;
}

.about-quote {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 40px;
  margin-top: clamp(58px, 7vw, 88px);
  padding: 38px 0 36px;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.about-quote blockquote {
  max-width: 950px;
  margin: 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(1.28rem, 2.15vw, 2rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.55;
}

.about-quote > span {
  color: rgba(255, 255, 255, 0.48);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

/* ---------- 12. Contact ---------- */
.contact {
  position: relative;
  padding: clamp(100px, 11.5vw, 160px) 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 88% 0%, rgba(255, 138, 91, 0.1), transparent 25%),
    var(--paper);
}

.contact::before {
  content: "";
  position: absolute;
  right: -170px;
  bottom: -220px;
  width: 480px;
  height: 480px;
  border: 1px solid rgba(16, 35, 45, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: clamp(50px, 7vw, 96px);
  align-items: start;
}

.contact-intro {
  padding-top: 6px;
}

.contact-intro h2 {
  margin: 0 0 24px;
  font-size: clamp(2.75rem, 5.2vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 1.13;
}

.contact-intro > p {
  max-width: 440px;
  margin-bottom: 38px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.9;
}

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

.contact-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.79rem;
}

.contact-item > span:first-child {
  color: var(--muted);
  flex: none;
}

.contact-item > span:last-child,
.contact-item a {
  color: var(--text);
  text-align: right;
}

.contact-item a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: color 0.3s ease;
}

.contact-item a .icon {
  font-size: 0.82rem;
  transition: transform 0.3s var(--ease-soft);
}

.contact-item a:hover {
  color: var(--aqua-deep);
}

.contact-item a:hover .icon {
  transform: translate(2px, -2px);
}

.contact-note {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  margin-top: 26px;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.7;
}

.contact-note .status-dot {
  flex: none;
  margin-top: 6px;
  background: var(--aqua-deep);
  box-shadow: 0 0 0 4px rgba(23, 181, 149, 0.08);
}

.contact-note .status-dot::after {
  border-color: rgba(23, 181, 149, 0.28);
}

.contact-form {
  position: relative;
  overflow: hidden;
  padding: clamp(27px, 3.6vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--white);
  box-shadow: 0 30px 80px rgba(16, 35, 45, 0.09), 0 2px 4px rgba(16, 35, 45, 0.025);
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.contact.is-targeted .contact-form {
  border-color: rgba(23, 181, 149, 0.55);
  box-shadow: 0 24px 70px rgba(16, 35, 45, 0.075), 0 0 0 4px rgba(23, 181, 149, 0.08);
}

.contact-form::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(23, 181, 149, 0.7), transparent);
}

.form-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 26px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.form-head > div {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-eyebrow {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.53rem;
  letter-spacing: 0.14em;
  line-height: 1.3;
}

.form-head strong {
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.form-step {
  padding-top: 4px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.08em;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 25px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
  margin-bottom: 20px;
}

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

.field label {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.field label span {
  color: var(--coral);
  font-size: 0.78rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 9px 0 11px;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-size: 0.87rem;
  line-height: 1.5;
  transition: border-color 0.3s ease;
}

.field input::placeholder,
.field textarea::placeholder {
  color: rgba(16, 35, 45, 0.38);
}

.field textarea {
  min-height: 84px;
  resize: vertical;
}

.field select {
  padding-right: 24px;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='m6 9 6 6 6-6' fill='none' stroke='%2310232d' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 2px center;
  background-size: 13px;
  cursor: pointer;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--aqua-deep);
}

.field.is-invalid input,
.field.is-invalid select,
.field.is-invalid textarea {
  border-color: #cf5c48;
}

.field-error {
  display: none;
  color: #b84735;
  font-size: 0.65rem;
  line-height: 1.4;
}

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

.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 3px;
}

.form-hint {
  max-width: 280px;
  margin: 0;
  color: #65777b;
  font-size: 0.65rem;
  line-height: 1.7;
}

.form-success {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(28px, 4vw, 50px);
  background:
    radial-gradient(circle at 90% 10%, rgba(102, 245, 212, 0.22), transparent 38%),
    var(--paper);
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.45s ease, visibility 0.45s;
}

.form-success.is-visible {
  visibility: visible;
  opacity: 1;
}

.form-success__icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 24px;
  border-radius: 50%;
  background: var(--aqua);
  color: var(--ink-950);
}

.form-success__icon .icon {
  width: 24px;
  height: 24px;
  stroke-width: 2;
}

.form-success h3 {
  margin: 10px 0 12px;
  color: var(--ink-950);
  font-size: clamp(1.8rem, 2.7vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.form-success p {
  max-width: 380px;
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.85;
}

/* ---------- 13. Footer ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  padding: clamp(72px, 8vw, 104px) 0 28px;
  background: var(--ink-950);
  color: var(--white);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -20%;
  right: 6%;
  width: 34vw;
  height: 34vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(102, 245, 212, 0.08), transparent 65%);
  pointer-events: none;
}

.footer-top {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.15fr);
  gap: clamp(50px, 8vw, 120px);
  padding-bottom: clamp(48px, 6vw, 70px);
  border-bottom: 1px solid var(--line-light);
}

.footer-brand .brand {
  margin-bottom: 22px;
}

.footer-brand > p {
  max-width: 320px;
  margin: 0;
  color: rgba(255, 255, 255, 0.42);
  font-size: 0.77rem;
  line-height: 1.9;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px;
}

.footer-col h3 {
  margin: 0 0 19px;
  color: rgba(255, 255, 255, 0.32);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  font-weight: 400;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.footer-col a {
  display: block;
  width: fit-content;
  margin-bottom: 11px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.78rem;
  line-height: 1.5;
  transition: color 0.3s ease, transform 0.3s var(--ease-soft);
}

.footer-col a:hover {
  color: var(--aqua);
  transform: translateX(3px);
}

.footer-wordmark {
  position: relative;
  z-index: 1;
  margin: clamp(54px, 7vw, 82px) 0 34px;
  color: transparent;
  font-family: var(--font-en);
  font-size: clamp(4.2rem, 14vw, 14rem);
  font-weight: 700;
  letter-spacing: -0.075em;
  line-height: 0.78;
  text-align: center;
  white-space: nowrap;
  user-select: none;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.105);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding-top: 23px;
  border-top: 1px solid var(--line-light);
  color: rgba(255, 255, 255, 0.48);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.02em;
  line-height: 1.7;
}

.footer-motto {
  color: rgba(255, 255, 255, 0.58);
  letter-spacing: 0.05em;
}

.footer-legal {
  display: flex;
  gap: 18px;
}

.footer-legal a {
  transition: color 0.3s ease;
}

.footer-legal a:hover {
  color: var(--aqua);
}

/* ---------- 14. Back to top ---------- */
.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 80;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--aqua);
  color: var(--ink-950);
  box-shadow: 0 12px 30px rgba(6, 18, 27, 0.22);
  visibility: hidden;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.35s ease, transform 0.35s var(--ease-soft), visibility 0.35s, background-color 0.3s ease;
}

.to-top .icon {
  width: 18px;
  height: 18px;
  stroke-width: 1.8;
}

.to-top.is-visible {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.to-top:hover {
  background: #8dffe4;
  transform: translateY(-2px);
}

/* ---------- 15. Reveal & animations ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.85s var(--ease-soft),
    transform 0.85s var(--ease-soft);
}

.js [data-reveal][data-delay="1"] {
  transition-delay: 0.08s;
}

.js [data-reveal][data-delay="2"] {
  transition-delay: 0.16s;
}

.js [data-reveal][data-delay="3"] {
  transition-delay: 0.24s;
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes heroLineIn {
  to { transform: translateY(0); }
}

@keyframes lineGrow {
  to { transform: scaleX(1); }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  to { opacity: 1; }
}

@keyframes heroDrift {
  from { transform: scale(1.045) translate3d(0, 0, 0); }
  to { transform: scale(1.075) translate3d(-0.7%, -0.8%, 0); }
}

@keyframes statusPulse {
  0% {
    opacity: 0.55;
    transform: scale(0.6);
  }
  60%,
  100% {
    opacity: 0;
    transform: scale(1.35);
  }
}

@keyframes scrollLine {
  0% { transform: translateY(0); opacity: 0; }
  22% { opacity: 1; }
  70% { opacity: 1; }
  100% { transform: translateY(85px); opacity: 0; }
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

@keyframes menuItemIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 16. Responsive ---------- */
@media (max-width: 1220px) {
  .primary-nav {
    gap: 25px;
    margin-right: 30px;
  }

  .hero-copy {
    width: min(720px, 64%);
  }

  .hero h1 {
    font-size: clamp(3.4rem, 6.5vw, 5.8rem);
  }

  .about-media {
    min-height: 480px;
  }
}

@media (max-width: 1080px) {
  .primary-nav,
  .nav-cta {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .nav {
    height: 78px;
  }

  .hero {
    padding-top: 78px;
  }

  .hero-art {
    width: 82%;
  }

  .hero-copy {
    width: min(700px, 70%);
  }

  .hero h1 {
    font-size: clamp(3.4rem, 7.5vw, 5.45rem);
  }

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

  .product-card,
  .product-card:nth-child(1),
  .product-card:nth-child(2),
  .product-card:nth-child(3),
  .product-card:nth-child(4) {
    grid-column: 1 / -1;
  }

  .product-media {
    height: clamp(300px, 42vw, 430px);
  }

  .about-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 45px;
  }

  .about-media {
    min-height: 510px;
  }
}

@media (max-width: 960px) {
  .section-head {
    grid-template-columns: 1fr;
    gap: 25px;
    align-items: start;
  }

  .section-intro {
    max-width: 640px;
    margin-bottom: 0;
  }

  .hero-copy {
    width: min(650px, 78%);
  }

  .hero-art {
    width: 96%;
    opacity: 0.9;
  }

  .hero-art img {
    object-position: 66% center;
  }

  .hero-art::before {
    background:
      linear-gradient(90deg, var(--ink-950) 0%, rgba(6, 18, 27, 0.9) 34%, rgba(6, 18, 27, 0.46) 66%, rgba(6, 18, 27, 0.2) 100%),
      linear-gradient(0deg, var(--ink-950) 0%, rgba(6, 18, 27, 0.45) 16%, transparent 42%),
      linear-gradient(180deg, rgba(6, 18, 27, 0.82) 0%, transparent 30%);
  }

  .hero h1 {
    font-size: clamp(3.15rem, 7.8vw, 5rem);
  }

  .hero-side {
    display: none;
  }

  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stat {
    padding: 24px 20px 18px 0;
    border-bottom: 1px solid var(--line);
  }

  .stat:nth-child(2n) {
    border-right: 0;
    padding-left: 24px;
  }

  .stat:nth-child(n + 3) {
    padding-top: 24px;
    border-bottom: 0;
  }

  .loop-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: 0;
  }

  .loop-step {
    padding: 29px 26px 38px 0;
    border-top: 1px solid var(--line-strong);
    border-right: 1px solid var(--line);
  }

  .loop-step:nth-child(2n) {
    padding-left: 26px;
    border-right: 0;
  }

  .loop-step:nth-child(odd) {
    padding-left: 0;
  }

  .loop-step:nth-child(n + 3) {
    padding-bottom: 8px;
  }

  .loop-step::before,
  .loop-step:not(:first-child)::before {
    top: -5px;
    left: 0;
  }

  .loop-step:nth-child(2n)::before {
    left: 26px;
  }

  .loop-step__top {
    margin-bottom: 32px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .about-media {
    min-height: 420px;
    order: 2;
  }

  .about-copy {
    order: 1;
    padding: 0;
  }

  .about-copy h2 {
    font-size: clamp(2.4rem, 5.3vw, 3.7rem);
  }

  .about-copy > p {
    max-width: 640px;
  }

  .about-quote {
    grid-template-columns: 1fr;
    gap: 18px;
    align-items: start;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .contact-intro > p {
    max-width: 620px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 42px;
  }
}

@media (max-width: 700px) {
  html {
    scroll-padding-top: 78px;
  }

  .container {
    width: calc(100% - 40px);
  }

  .nav {
    height: 70px;
  }

  .hero {
    min-height: 100svh;
    padding-top: 70px;
  }

  .brand-mark {
    width: 35px;
    height: 35px;
    border-radius: 11px;
  }

  .brand-text strong {
    font-size: 0.9rem;
  }

  .brand-text span {
    font-size: 0.47rem;
  }

  .menu-toggle {
    width: 41px;
    height: 41px;
  }

  .menu-toggle span {
    left: 11px;
    width: 17px;
  }

  .menu-toggle span:first-child {
    top: 15px;
  }

  .menu-toggle span:last-child {
    top: 22px;
  }

  .mobile-menu__inner {
    padding-top: 98px;
  }

  .mobile-menu__foot {
    display: block;
  }

  .mobile-menu__foot p {
    margin-bottom: 14px;
  }

  .hero-grid {
    padding-top: 48px;
    padding-bottom: 40px;
    align-items: flex-start;
  }

  .hero-copy {
    width: 100%;
  }

  .hero-eyebrow {
    margin-bottom: 22px;
    font-size: 0.55rem;
    letter-spacing: 0.1em;
  }

  .hero h1 {
    font-size: clamp(2.72rem, 11.7vw, 3.85rem);
    letter-spacing: -0.06em;
  }

  .hero-lead {
    max-width: 92%;
    margin-top: 24px;
    font-size: 0.9rem;
    line-height: 1.8;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    max-width: 300px;
    margin-top: 28px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 38px;
  }

  .hero-stats li {
    padding: 14px 14px 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .hero-stats li:nth-child(2n) {
    border-right: 0;
    padding-left: 16px;
  }

  .hero-stats li:nth-child(n + 3) {
    padding-top: 14px;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .hero-stats strong {
    font-size: 1.12rem;
  }

  .hero-stats span {
    font-size: 0.61rem;
  }

  .hero-art {
    width: 150%;
    height: 78%;
    top: 16%;
    right: -46%;
    opacity: 0.48;
  }

  .hero-art::before {
    background:
      linear-gradient(90deg, var(--ink-950) 0%, rgba(6, 18, 27, 0.72) 36%, rgba(6, 18, 27, 0.24) 100%),
      linear-gradient(0deg, var(--ink-950) 0%, transparent 58%),
      linear-gradient(180deg, rgba(6, 18, 27, 0.7), transparent 35%);
  }

  .hero-art::after {
    background: radial-gradient(circle at 50% 45%, transparent 0%, rgba(6, 18, 27, 0.16) 42%, rgba(6, 18, 27, 0.5) 100%);
  }

  .hero-foot {
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .hero-foot__index {
    display: none;
  }

  .scroll-cue {
    font-size: 0.48rem;
  }

  .scroll-cue__line {
    height: 27px;
  }

  .signal-band {
    padding: 12px 0;
  }

  .signal-group {
    padding-right: 28px;
  }

  .signal-group span {
    gap: 28px;
    font-size: 0.59rem;
  }

  .kicker {
    margin-bottom: 19px;
    font-size: 0.56rem;
    letter-spacing: 0.14em;
  }

  .kicker::after {
    width: 24px;
  }

  .kicker span {
    width: 23px;
    height: 23px;
    font-size: 0.49rem;
  }

  .section-head h2,
  .manifesto h2 {
    font-size: clamp(2rem, 8.5vw, 2.9rem);
    letter-spacing: -0.05em;
    line-height: 1.2;
  }

  .manifesto-copy p {
    font-size: 0.86rem;
  }

  .manifesto-copy p + p {
    font-size: 0.82rem;
  }

  .stats {
    margin-top: 45px;
  }

  .stat {
    padding: 20px 14px 17px 0;
  }

  .stat:nth-child(2n) {
    padding-left: 15px;
  }

  .stat strong {
    font-size: clamp(2.25rem, 10vw, 2.8rem);
  }

  .stat span {
    font-size: 0.61rem;
  }

  .product-grid {
    gap: 14px;
  }

  .product-card {
    border-radius: 23px;
  }

  .product-media {
    height: clamp(210px, 54vw, 300px);
  }

  .product-index {
    top: 14px;
    left: 15px;
  }

  .product-float {
    right: 15px;
    bottom: 14px;
    font-size: 0.46rem;
  }

  .product-body {
    padding: 21px 20px 22px;
  }

  .product-meta {
    margin-bottom: 13px;
  }

  .product-name {
    font-size: 0.72rem;
  }

  .product-en {
    font-size: 0.44rem;
  }

  .product-body h3 {
    font-size: clamp(1.35rem, 6vw, 1.7rem);
  }

  .product-body p {
    margin-bottom: 18px;
    font-size: 0.78rem;
    line-height: 1.8;
  }

  .tag-list {
    margin-bottom: 18px;
  }

  .tag-list li {
    padding: 4px 8px;
    font-size: 0.61rem;
  }

  .card-actions {
    gap: 12px;
    padding-top: 15px;
  }

  .card-link {
    gap: 10px;
    font-size: 0.72rem;
  }

  .card-link__domain {
    font-size: 0.57rem;
  }

  .card-demo {
    font-size: 0.61rem;
  }

  .card-link__arrow {
    width: 31px;
    height: 31px;
  }

  .loop-track {
    grid-template-columns: 1fr;
  }

  .loop-step {
    padding: 25px 0 27px;
    border-top: 1px solid var(--line-strong);
    border-right: 0;
  }

  .loop-step:nth-child(2n) {
    padding-left: 0;
    border-right: 0;
  }

  .loop-step:nth-child(n + 3) {
    padding-bottom: 27px;
  }

  .loop-step:nth-child(2n)::before {
    left: 0;
  }

  .loop-step__top {
    margin-bottom: 25px;
  }

  .loop-verb {
    margin-bottom: 15px;
    font-size: 3.15rem;
  }

  .loop-verb span {
    padding-bottom: 6px;
    font-size: 0.43rem;
  }

  .loop-step p {
    max-width: 520px;
    margin-bottom: 18px;
  }

  .loop-note {
    flex-wrap: wrap;
    gap: 15px 20px;
    margin-top: 42px;
    padding: 23px 0;
  }

  .loop-note__line {
    width: 34px;
  }

  .loop-note p {
    flex-basis: calc(100% - 54px);
    font-size: 0.76rem;
  }

  .loop-note .text-link {
    margin-left: 54px;
  }

  .about-media {
    min-height: 300px;
    border-radius: 24px;
  }

  .about-caption {
    right: 18px;
    bottom: 16px;
    left: 18px;
    font-size: 0.45rem;
  }

  .about-copy h2 {
    font-size: clamp(2.15rem, 9vw, 3rem);
  }

  .about-copy > p {
    font-size: 0.83rem;
  }

  .value-list {
    margin-top: 25px;
  }

  .value-item {
    grid-template-columns: 27px minmax(0, 1fr);
    gap: 12px;
  }

  .about-quote {
    margin-top: 46px;
    padding: 28px 0;
  }

  .about-quote blockquote {
    font-size: 1.16rem;
    line-height: 1.6;
  }

  .contact-intro h2 {
    font-size: clamp(2.55rem, 11.5vw, 3.7rem);
  }

  .contact-intro > p {
    margin-bottom: 28px;
    font-size: 0.85rem;
  }

  .contact-item {
    align-items: flex-start;
    font-size: 0.73rem;
  }

  .contact-item a {
    font-size: 0.71rem;
  }

  .contact-form {
    padding: 24px 20px 25px;
    border-radius: 24px;
  }

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

  .field {
    margin-bottom: 18px;
  }

  .field--full {
    grid-column: auto;
  }

  .form-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 17px;
  }

  .form-actions .btn {
    width: 100%;
  }

  .form-hint {
    max-width: 100%;
    text-align: center;
  }

  .form-success {
    padding: 27px 22px;
  }

  .form-success h3 {
    font-size: 1.8rem;
  }

  .footer-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 20px;
  }

  .footer-col:nth-child(3) {
    grid-column: 1 / -1;
  }

  .footer-col h3 {
    margin-bottom: 13px;
  }

  .footer-col a {
    font-size: 0.73rem;
  }

  .footer-wordmark {
    margin: 48px 0 26px;
    font-size: clamp(3.2rem, 15vw, 5.2rem);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.56rem;
  }

  .footer-motto {
    order: 3;
  }

  .to-top {
    right: 15px;
    bottom: 15px;
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 390px) {
  .hero h1 {
    font-size: 2.55rem;
  }

  .hero-eyebrow {
    font-size: 0.5rem;
  }

  .hero-stats span {
    font-size: 0.54rem;
  }

  .hero-actions {
    max-width: 100%;
  }

  .brand-text span {
    letter-spacing: 0.16em;
  }

  .about-caption span:last-child {
    display: none;
  }

  .form-head strong {
    font-size: 1rem;
  }
}

/* ---------- 17. Accessibility & output ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .signal-track {
    animation: none;
  }
}

@media print {
  .site-header,
  .mobile-menu,
  .hero-art,
  .to-top,
  .page-progress,
  .signal-band {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .hero,
  .products,
  .about,
  .site-footer {
    background: #fff !important;
    color: #000 !important;
  }

  .hero {
    min-height: auto;
    padding: 20px 0;
  }

  .hero h1,
  .products h2,
  .about h2,
  .about-copy h2,
  .product-body h3,
  .footer-brand .brand {
    color: #000 !important;
  }

  .product-card,
  .contact-form {
    break-inside: avoid;
  }
}