:root {
  --kai-orange: #FF6B35;
  --kai-orange-deep: #E8552B;
  --kai-orange-light: #FF9E80;
  --kai-orange-text: #C44A1E;
  --kai-green: #00B87E;
  --kai-green-text: #007A55;
  --kai-sky-blue: #3A7BD5;
  --kai-sky-text: #1F5BA8;
  --kai-deep-blue: #1B2A4A;
  --kai-dark-blue: #0D1B2A;
  --kai-off-white: #F9F9F7;
  --kai-light-gray: #F2F2F0;
  --kai-dark-gray: #333333;
  --kai-white: #FFFFFF;
  --kai-font-heading: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --kai-font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --kai-font-mono: "SF Mono", "IBM Plex Mono", Menlo, Consolas, monospace;
  --kai-radius-lg: 28px;
  --kai-radius-md: 18px;
  --kai-radius-sm: 12px;
  --kai-radius-pill: 999px;
  --kai-shadow-sm: 0 4px 14px rgba(27, 42, 74, 0.08);
  --kai-shadow-md: 0 10px 28px rgba(27, 42, 74, 0.14);
  --kai-shadow-lg: 0 18px 48px rgba(27, 42, 74, 0.18);
  --kai-transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --kai-header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--kai-deep-blue) var(--kai-light-gray);
}

body {
  min-height: 100vh;
  font-family: var(--kai-font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--kai-dark-gray);
  background: var(--kai-off-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul,
ol {
  list-style: none;
}

a {
  color: var(--kai-sky-text);
  text-decoration: none;
}

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

::selection {
  background: var(--kai-orange);
  color: var(--kai-white);
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--kai-font-heading);
  font-weight: 900;
  line-height: 1.2;
  color: var(--kai-deep-blue);
  margin: 0 0 16px;
}

h1 {
  font-size: clamp(32px, 4.4vw, 48px);
}

h2 {
  font-size: clamp(26px, 3vw, 32px);
}

h3 {
  font-size: 24px;
}

h4 {
  font-size: 19px;
}

p {
  margin: 0 0 16px;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--kai-light-gray);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--kai-deep-blue), var(--kai-orange));
  border-radius: 4px;
}

.kai-container {
  width: min(100% - 32px, 1200px);
  margin-inline: auto;
}

@media (min-width: 768px) {
  .kai-container {
    width: min(100% - 48px, 1200px);
  }
}

.kai-page {
  padding-top: calc(var(--kai-header-h) + 48px);
  padding-bottom: 80px;
  min-height: 70vh;
}

.kai-prose {
  max-width: 720px;
  font-size: 16px;
  line-height: 1.8;
}

.kai-prose p {
  margin-bottom: 1.4em;
}

.kai-prose h2 {
  margin-top: 2em;
  margin-bottom: 0.8em;
}

.kai-section {
  padding: 96px 0;
}

.kai-section--tight {
  padding: 48px 0;
}

.kai-section--alt {
  background: var(--kai-light-gray);
}

.kai-section--dark {
  background: linear-gradient(160deg, var(--kai-deep-blue), var(--kai-dark-blue));
  color: rgba(255, 255, 255, 0.78);
}

.kai-section--dark h1,
.kai-section--dark h2,
.kai-section--dark h3 {
  color: var(--kai-white);
}

.kai-section__head {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 48px;
}

.kai-section__head-body {
  flex: 1;
  min-width: 0;
}

.kai-section__note {
  writing-mode: vertical-rl;
  font-family: var(--kai-font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: #9AA3B2;
  flex: none;
}

.kai-annotation {
  writing-mode: vertical-rl;
  font-family: var(--kai-font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
}

.kai-display {
  font-family: var(--kai-font-heading);
  font-weight: 900;
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--kai-deep-blue);
}

.kai-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--kai-font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--kai-orange-text);
  margin-bottom: 16px;
}

.kai-kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  border-radius: 2px;
  background: var(--kai-orange);
}

.kai-grid {
  display: grid;
  gap: 24px;
}

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

.kai-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.kai-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1023px) {
  .kai-grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .kai-grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .kai-grid--2,
  .kai-grid--3,
  .kai-grid--4 {
    grid-template-columns: 1fr;
  }
}

.kai-divider {
  height: 1px;
  border: none;
  margin: 32px 0;
  background: linear-gradient(90deg, transparent, rgba(27, 42, 74, 0.2), transparent);
}

.kai-skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1006;
  padding: 8px 20px;
  background: var(--kai-deep-blue);
  color: var(--kai-white);
  border-radius: var(--kai-radius-pill);
  font-size: 14px;
  font-weight: 600;
  transform: translateY(-200%);
  transition: transform var(--kai-transition);
}

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

.kai-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--kai-orange), var(--kai-orange-light), var(--kai-green));
  border-radius: 0 3px 3px 0;
  z-index: 1005;
  pointer-events: none;
  transition: width 0.08s linear;
}

.kai-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1003;
  height: var(--kai-header-h);
  background: transparent;
  transition: background var(--kai-transition), box-shadow var(--kai-transition);
}

.kai-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(13, 27, 42, 0.45), transparent);
  opacity: 1;
  transition: opacity var(--kai-transition);
  pointer-events: none;
}

.kai-header.is-scrolled {
  background: var(--kai-deep-blue);
  box-shadow: 0 4px 24px rgba(13, 27, 42, 0.18);
}

.kai-header.is-scrolled::before {
  opacity: 0;
}

.kai-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: var(--kai-header-h);
  position: relative;
  z-index: 2;
}

.kai-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex: none;
}

.kai-brand__mark {
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--kai-orange-deep), var(--kai-orange));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.35);
}

.kai-brand__mark::after {
  content: "";
  width: 14px;
  height: 14px;
  border: 3px solid var(--kai-white);
  border-left-color: transparent;
  border-radius: 50%;
  transform: rotate(45deg);
}

.kai-brand__dot {
  position: absolute;
  top: -3px;
  right: -3px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--kai-green);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.65);
}

.kai-brand__name {
  font-family: var(--kai-font-heading);
  font-weight: 900;
  font-size: 20px;
  color: var(--kai-white);
  letter-spacing: 0.04em;
  white-space: nowrap;
  text-shadow: 0 1px 8px rgba(13, 27, 42, 0.4);
}

.kai-brand__name em {
  font-style: normal;
  font-family: var(--kai-font-mono);
  font-weight: 700;
  font-size: 15px;
  color: var(--kai-orange-light);
  margin-left: 2px;
}

.kai-header.is-scrolled .kai-brand__name {
  text-shadow: none;
}

.kai-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.kai-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-inline: auto;
}

.kai-nav__list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.kai-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  color: var(--kai-white);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  text-shadow: 0 1px 8px rgba(13, 27, 42, 0.4);
  transition: color var(--kai-transition);
}

.kai-header.is-scrolled .kai-nav__link {
  text-shadow: none;
}

.kai-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--kai-orange), var(--kai-green));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--kai-transition);
}

.kai-nav__link:hover,
.kai-nav__link:focus-visible {
  color: var(--kai-orange-light);
}

.kai-nav__link:hover::after,
.kai-nav__link:focus-visible::after {
  transform: scaleX(1);
}

.kai-nav__link[aria-current="page"] {
  color: var(--kai-orange-light);
}

.kai-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.kai-nav__cta {
  flex: none;
}

.kai-nav__cta--mobile {
  display: none;
}

.kai-nav-toggle {
  display: none;
}

.kai-nav-scrim {
  display: none;
}

@media (max-width: 1023px) and (min-width: 768px) {
  .kai-nav__list {
    gap: 18px;
  }

  .kai-header__inner {
    gap: 16px;
  }

  .kai-nav__link {
    font-size: 14px;
  }

  .kai-nav__cta {
    padding: 10px 16px;
    font-size: 13px;
  }
}

@media (max-width: 767px) {
  :root {
    --kai-header-h: 60px;
  }

  body {
    padding-bottom: 60px;
  }

  .kai-header__inner {
    gap: 12px;
  }

  .kai-brand__mark {
    width: 30px;
    height: 30px;
    border-radius: 10px;
  }

  .kai-brand__name {
    font-size: 17px;
  }

  .kai-nav__cta--desktop {
    display: none;
  }

  .kai-nav-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(13, 27, 42, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.24);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    flex: none;
  }

  .kai-nav-toggle__bar {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: var(--kai-white);
    transition: transform var(--kai-transition), opacity var(--kai-transition);
  }

  .kai-nav-toggle__bar + .kai-nav-toggle__bar {
    margin-top: 5px;
  }

  .kai-nav-toggle.is-active .kai-nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .kai-nav-toggle.is-active .kai-nav-toggle__bar:nth-child(2) {
    opacity: 0;
  }

  .kai-nav-toggle.is-active .kai-nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .kai-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 5;
    width: min(320px, 86vw);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 8px;
    margin: 0;
    padding: calc(var(--kai-header-h) + 16px) 24px 32px;
    background: var(--kai-deep-blue);
    border-radius: 28px 0 0 28px;
    box-shadow: -12px 0 32px rgba(13, 27, 42, 0.25);
    opacity: 0;
    visibility: hidden;
    transform: translateX(105%);
    transition: transform var(--kai-transition), opacity var(--kai-transition);
    overflow-y: auto;
  }

  .kai-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
  }

  .kai-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .kai-nav__link {
    display: block;
    padding: 14px 12px;
    font-size: 17px;
    border-radius: 12px;
    text-shadow: none;
  }

  .kai-nav__link:hover,
  .kai-nav__link:focus-visible {
    background: rgba(255, 255, 255, 0.06);
  }

  .kai-nav__link[aria-current="page"] {
    background: rgba(255, 107, 53, 0.16);
    color: var(--kai-orange-light);
  }

  .kai-nav__cta--mobile {
    display: inline-flex;
    width: 100%;
    justify-content: center;
    margin-top: 24px;
    text-shadow: none;
  }

  .kai-nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 1;
    background: rgba(13, 27, 42, 0.55);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--kai-transition), visibility var(--kai-transition);
  }

  .kai-nav-scrim.is-visible {
    opacity: 1;
    visibility: visible;
  }
}

.kai-tabbar {
  display: none;
}

@media (max-width: 767px) {
  .kai-tabbar {
    display: flex;
    justify-content: space-around;
    align-items: stretch;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 6px 8px max(6px, env(safe-area-inset-bottom));
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid rgba(27, 42, 74, 0.08);
    box-shadow: 0 -4px 20px rgba(13, 27, 42, 0.06);
  }

  .kai-tabbar__item {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    min-height: 44px;
    padding: 4px 0;
    color: #7C8698;
    font-size: 11px;
    font-weight: 600;
    text-decoration: none;
    transition: color var(--kai-transition);
  }

  .kai-tabbar__item[aria-current="page"] {
    color: var(--kai-orange);
  }

  .kai-tabbar__item[aria-current="page"]::before {
    content: "";
    position: absolute;
    top: -7px;
    left: 50%;
    transform: translateX(-50%);
    width: 28px;
    height: 3px;
    border-radius: 0 0 3px 3px;
    background: linear-gradient(90deg, var(--kai-orange), var(--kai-green));
  }

  .kai-tabbar__icon {
    position: relative;
    width: 22px;
    height: 22px;
    border: 2px solid currentColor;
    border-radius: 7px;
  }

  .kai-tabbar__icon--home {
    border: none;
  }

  .kai-tabbar__icon--home::before {
    content: "";
    position: absolute;
    top: 3px;
    left: 4px;
    width: 14px;
    height: 11px;
    border: 2px solid currentColor;
    border-bottom: none;
    border-radius: 5px 5px 0 0;
  }

  .kai-tabbar__icon--home::after {
    content: "";
    position: absolute;
    bottom: 1px;
    left: 1px;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
  }

  .kai-tabbar__icon--apps {
    border-color: transparent;
  }

  .kai-tabbar__icon--apps::after {
    content: "";
    position: absolute;
    top: 3px;
    left: 3px;
    width: 6px;
    height: 6px;
    border-radius: 2px;
    background: currentColor;
    box-shadow: 9px 0 0 currentColor, 0 9px 0 currentColor, 9px 9px 0 currentColor;
  }

  .kai-tabbar__icon--journal {
    border-radius: 5px;
  }

  .kai-tabbar__icon--journal::before {
    content: "";
    position: absolute;
    top: 6px;
    left: 4px;
    width: 11px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    box-shadow: 0 5px 0 currentColor;
  }

  .kai-tabbar__icon--journal::after {
    content: "";
    position: absolute;
    top: 3px;
    left: 4px;
    width: 5px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
  }

  .kai-tabbar__icon--faq {
    border-radius: 50%;
  }

  .kai-tabbar__icon--faq::after {
    content: "?";
    position: absolute;
    inset: 0;
    font-family: var(--kai-font-mono);
    font-size: 13px;
    font-weight: 700;
    line-height: 18px;
    text-align: center;
    color: currentColor;
  }

  .kai-tabbar__icon--contact {
    border-color: transparent;
  }

  .kai-tabbar__icon--contact::before {
    content: "";
    position: absolute;
    top: 2px;
    left: 7px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
  }

  .kai-tabbar__icon--contact::after {
    content: "";
    position: absolute;
    top: 11px;
    left: 3px;
    width: 14px;
    height: 8px;
    border-radius: 9px 9px 0 0;
    background: currentColor;
  }
}

.kai-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--kai-radius-pill);
  font-family: var(--kai-font-heading);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  text-decoration: none;
  border: 2px solid transparent;
  transition: transform var(--kai-transition), box-shadow var(--kai-transition), background var(--kai-transition), color var(--kai-transition), border-color var(--kai-transition);
}

.kai-btn--primary {
  background: linear-gradient(135deg, #C44A1E, var(--kai-orange-deep));
  color: var(--kai-white);
  box-shadow: 0 6px 16px rgba(255, 107, 53, 0.35);
}

.kai-btn--primary:hover,
.kai-btn--primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(255, 107, 53, 0.45);
}

.kai-btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.7);
  color: var(--kai-white);
}

.kai-btn--ghost:hover,
.kai-btn--ghost:focus-visible {
  border-color: var(--kai-orange);
  color: var(--kai-orange-light);
}

.kai-btn--dark {
  background: var(--kai-deep-blue);
  color: var(--kai-white);
}

.kai-btn--dark:hover,
.kai-btn--dark:focus-visible {
  background: var(--kai-dark-blue);
  transform: translateY(-2px);
}

.kai-btn--small {
  padding: 8px 16px;
  font-size: 13px;
}

.kai-breadcrumb {
  padding: 16px 0 0;
  font-size: 14px;
}

.kai-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.kai-breadcrumb__list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--kai-dark-gray);
}

.kai-breadcrumb__list li + li::before {
  content: "/";
  font-family: var(--kai-font-mono);
  color: var(--kai-sky-blue);
}

.kai-breadcrumb__list a {
  color: var(--kai-sky-text);
  transition: color var(--kai-transition);
}

.kai-breadcrumb__list a:hover,
.kai-breadcrumb__list a:focus-visible {
  color: var(--kai-orange-text);
}

.kai-breadcrumb__list li[aria-current="page"] {
  font-weight: 600;
  color: var(--kai-dark-gray);
}

.kai-card {
  background: var(--kai-white);
  border: 1px solid transparent;
  border-radius: var(--kai-radius-lg);
  padding: 28px;
  box-shadow: var(--kai-shadow-sm);
  transition: box-shadow var(--kai-transition), transform var(--kai-transition), border-color var(--kai-transition);
}

.kai-card:hover,
.kai-card:focus-within {
  border-color: rgba(255, 107, 53, 0.25);
  box-shadow: var(--kai-shadow-md);
  transform: translateY(-4px);
}

.kai-card__title {
  font-size: 18px;
  margin-bottom: 12px;
}

.kai-card__desc {
  font-size: 14px;
  line-height: 1.7;
  color: #666;
}

.kai-card__footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--kai-light-gray);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.kai-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: var(--kai-radius-pill);
  font-size: 13px;
  font-weight: 600;
  background: var(--kai-light-gray);
  color: var(--kai-dark-gray);
}

.kai-tag--orange {
  background: rgba(255, 107, 53, 0.12);
  color: var(--kai-orange-text);
}

.kai-tag--green {
  background: rgba(0, 184, 126, 0.12);
  color: var(--kai-green-text);
}

.kai-tag--blue {
  background: rgba(58, 123, 213, 0.12);
  color: var(--kai-sky-text);
}

.kai-link-underline {
  position: relative;
  text-decoration: none;
  color: var(--kai-deep-blue);
  font-weight: 600;
}

.kai-link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--kai-orange);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--kai-transition);
}

.kai-link-underline:hover::after,
.kai-link-underline:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.kai-index {
  display: grid;
  gap: 12px;
  padding: 20px;
  background: var(--kai-light-gray);
  border-radius: var(--kai-radius-lg);
}

.kai-index__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  background: var(--kai-white);
  border: 1px solid transparent;
  border-radius: var(--kai-radius-md);
  font-weight: 600;
  font-size: 14px;
  color: var(--kai-deep-blue);
  text-decoration: none;
  transition: border-color var(--kai-transition), box-shadow var(--kai-transition), transform var(--kai-transition);
}

.kai-index__item:hover,
.kai-index__item:focus-visible {
  border-color: rgba(255, 107, 53, 0.3);
  box-shadow: var(--kai-shadow-sm);
  transform: translateX(4px);
}

.kai-index__num {
  font-family: var(--kai-font-mono);
  font-size: 13px;
  color: var(--kai-orange-text);
}

.kai-evidence {
  border-left: 4px solid var(--kai-orange);
  background: var(--kai-white);
  border-radius: 0 var(--kai-radius-md) var(--kai-radius-md) 0;
  padding: 20px 24px;
  box-shadow: var(--kai-shadow-sm);
  font-size: 15px;
  line-height: 1.8;
}

.kai-term {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 6px;
  background: rgba(255, 107, 53, 0.1);
  color: var(--kai-orange-text);
  font-weight: 600;
  font-size: 0.88em;
  line-height: 1.5;
}

.kai-reading {
  font-size: 14px;
}

.kai-reading li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(27, 42, 74, 0.15);
}

.kai-reading li::before {
  content: "→";
  flex: none;
  color: var(--kai-orange);
  font-family: var(--kai-font-mono);
  font-weight: 700;
}

.kai-reading a {
  color: var(--kai-deep-blue);
  text-decoration: none;
  font-weight: 600;
}

.kai-reading a:hover,
.kai-reading a:focus-visible {
  color: var(--kai-orange-text);
}

.kai-stat {
  font-family: var(--kai-font-mono);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--kai-orange);
  letter-spacing: -0.02em;
}

.kai-stat__label {
  display: block;
  margin-top: 8px;
  font-family: var(--kai-font-body);
  font-size: 13px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.65);
}

.kai-stat--on-light .kai-stat__label {
  color: var(--kai-dark-gray);
}

.kai-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  background: var(--kai-light-gray);
  border-radius: var(--kai-radius-pill);
}

.kai-tabs__item {
  padding: 8px 20px;
  border-radius: var(--kai-radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--kai-dark-gray);
  transition: background var(--kai-transition), color var(--kai-transition), box-shadow var(--kai-transition);
}

.kai-tabs__item:hover,
.kai-tabs__item:focus-visible {
  color: var(--kai-orange-text);
}

.kai-tabs__item[aria-selected="true"] {
  background: var(--kai-white);
  color: var(--kai-orange-text);
  box-shadow: var(--kai-shadow-sm);
}

.kai-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 14px;
  background: var(--kai-white);
  border-radius: var(--kai-radius-lg);
  overflow: hidden;
  box-shadow: var(--kai-shadow-sm);
}

.kai-table th {
  text-align: left;
  padding: 14px 18px;
  background: var(--kai-deep-blue);
  color: var(--kai-white);
  font-family: var(--kai-font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.kai-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--kai-light-gray);
  font-variant-numeric: tabular-nums;
}

.kai-table tr:last-child td {
  border-bottom: none;
}

.kai-table tbody tr {
  transition: background var(--kai-transition);
}

.kai-table tbody tr:hover {
  background: rgba(255, 107, 53, 0.05);
}

.kai-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--kai-radius-lg);
  background: var(--kai-light-gray);
}

.kai-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(160deg, rgba(255, 107, 53, 0.08), transparent 40%),
    linear-gradient(320deg, rgba(0, 184, 126, 0.08), transparent 45%),
    radial-gradient(circle at 70% 30%, rgba(58, 123, 213, 0.12), transparent 55%);
  pointer-events: none;
}

.kai-media--landscape {
  aspect-ratio: 16 / 9;
}

.kai-media--portrait {
  aspect-ratio: 4 / 5;
}

.kai-media--hero {
  aspect-ratio: 16 / 10;
  border-radius: 32px;
}

.kai-media--square {
  aspect-ratio: 1 / 1;
}

.kai-back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--kai-deep-blue);
  color: var(--kai-white);
  box-shadow: 0 8px 20px rgba(13, 27, 42, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--kai-transition), transform var(--kai-transition), visibility var(--kai-transition), background var(--kai-transition);
  z-index: 998;
  position: fixed;
}

.kai-back-top::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 17px;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--kai-white);
  border-bottom: 2px solid var(--kai-white);
  border-radius: 1px;
  transform: rotate(-45deg);
}

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

.kai-back-top:hover,
.kai-back-top:focus-visible {
  background: var(--kai-orange-deep);
}

@media (max-width: 767px) {
  .kai-back-top {
    right: 16px;
    bottom: 80px;
  }
}

.kai-footer {
  background: transparent;
  color: rgba(255, 255, 255, 0.78);
}

.kai-footer__mountains {
  height: 64px;
  background:
    radial-gradient(ellipse 360px 110px at 82% 100%, #0D1B2A 50%, transparent 51%),
    radial-gradient(ellipse 240px 84px at 16% 100%, #0D1B2A 50%, transparent 51%),
    radial-gradient(ellipse 460px 140px at 45% 125%, #101E36 50%, transparent 51%);
}

.kai-footer__body {
  background: var(--kai-dark-blue);
  padding: 64px 0 32px;
}

.kai-footer__top {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
}

.kai-footer__brand {
  max-width: 420px;
}

.kai-footer__tagline {
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  line-height: 1.7;
}

.kai-footer__trust {
  margin: 16px 0 0;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.05);
  border-left: 3px solid var(--kai-green);
  border-radius: var(--kai-radius-md);
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

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

.kai-footer__heading {
  color: var(--kai-white);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.kai-footer__col li + li {
  margin-top: 10px;
}

.kai-footer__col a {
  display: inline-block;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--kai-transition), padding-left var(--kai-transition);
}

.kai-footer__col a:hover,
.kai-footer__col a:focus-visible {
  color: var(--kai-orange);
  padding-left: 4px;
}

.kai-footer__col--contact li {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  word-break: break-all;
}

.kai-footer__label {
  display: inline-block;
  min-width: 32px;
  margin-right: 4px;
  color: var(--kai-orange);
  font-size: 12px;
}

.kai-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--kai-font-mono);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.kai-brand--footer .kai-brand__mark {
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.25);
}

.kai-brand--footer .kai-brand__name {
  text-shadow: none;
}

@media (max-width: 1023px) {
  .kai-footer__top {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 767px) {
  .kai-footer__body {
    padding: 40px 0 24px;
  }

  .kai-footer__links {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .kai-footer__col--contact {
    grid-column: 1 / -1;
  }

  .kai-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    margin-top: 32px;
  }
}

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@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;
    transition-delay: 0ms !important;
  }

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

  .kai-back-top {
    transition: none;
  }
}