/* ==========================================================================
   GEO智见Insight — Base components v1.0
   Reset · fonts · layout · brand · nav · buttons · cards · typography · motion
   Every page must link tokens.css → base.css → (themes.css) → page css.
   ========================================================================== */

@font-face {
  font-family: "Archivo Black";
  src: url("fonts/ArchivoBlack-latin.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF,
    U+FFFD;
}

@font-face {
  font-family: "Space Grotesk";
  src: url("fonts/SpaceGrotesk-latin.woff2") format("woff2");
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF,
    U+FFFD;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  /* clip horizontal overflow caused by off-screen reveal transforms */
  overflow-x: clip;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

p {
  margin: 0;
}

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

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

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

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

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

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

/* ------------------------------ Layout ------------------------------ */
.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}

.container--wide {
  width: min(100% - 2.5rem, var(--container-wide));
  margin-inline: auto;
}

.container--narrow {
  width: min(100% - 2.5rem, 820px);
  margin-inline: auto;
}

.section {
  position: relative;
  padding-block: var(--section-y);
}

.section--tight {
  padding-block: clamp(3rem, 5vw, 5rem);
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.2vw, 2rem);
}

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

.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 900px) {
  .cols-3,
  .cols-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .cols-2,
  .cols-3,
  .cols-4 {
    grid-template-columns: minmax(0, 1fr);
  }
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}

@media (max-width: 900px) {
  .split {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ------------------------------ Type helpers ------------------------------ */
.display {
  font-family: var(--font-display);
  font-size: var(--fs-display);
  line-height: 0.98;
  letter-spacing: -0.035em;
}

.eyebrow,
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.kicker::before {
  content: "";
  width: 1.6em;
  height: 2px;
  background: currentColor;
  opacity: 0.7;
}

.h2 {
  font-size: var(--fs-h2);
  line-height: 1.06;
}

.h3 {
  font-size: var(--fs-h3);
  line-height: 1.15;
}

.lead {
  font-size: var(--fs-lead);
  line-height: 1.7;
  max-width: 62ch;
}

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

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.hl-rose {
  background: linear-gradient(180deg, transparent 58%, rgba(255, 47, 110, 0.55) 58%);
  padding-inline: 0.06em;
}

.hl-mint {
  background: linear-gradient(180deg, transparent 58%, rgba(155, 246, 201, 0.75) 58%);
  padding-inline: 0.06em;
}

/* Bright gradient for dark backgrounds (keeps AA contrast on --ink).
   text-shadow must be cleared: shadows paint above background-clip text and
   would darken the gradient. A drop-shadow filter is used instead. */
.grad-text {
  background: linear-gradient(100deg, #ff8fb1 0%, #ffb37a 58%, #b9ffdd 115%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
  filter: drop-shadow(0 3px 0 rgba(24, 15, 13, 0.5));
}

/* Deeper gradient for light/cream backgrounds (Rosé → Violet) */
.grad-text-deep {
  background: linear-gradient(100deg, var(--rose-deep) 0%, var(--violet) 72%, var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  text-shadow: none;
}

/* ------------------------------ Brand ------------------------------ */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.62rem;
  font-family: var(--font-sans);
  line-height: 1;
  white-space: nowrap;
}

.brand__mark {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  color: var(--rose);
  filter: drop-shadow(0 4px 10px rgba(255, 47, 110, 0.28));
}

.brand__text {
  display: inline-flex;
  align-items: baseline;
  gap: 0.34rem;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.12rem;
  letter-spacing: -0.01em;
  color: currentColor;
}

.brand__insight {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.78;
}

/* ------------------------------ Nav ------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease-out), border-color var(--dur);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 1.8vw, 1.75rem);
}

.nav__link {
  position: relative;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--fg-dim);
  padding-block: 0.35rem;
  transition: color var(--dur-fast) var(--ease-out);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--rose);
  transition: right var(--dur-fast) var(--ease-out);
}

.nav__link:hover,
.nav__link[aria-current="page"] {
  color: var(--fg);
}

.nav__link:hover::after,
.nav__link[aria-current="page"]::after {
  right: 0;
}

@media (max-width: 860px) {
  .nav {
    display: none;
  }

  .site-header__inner {
    min-height: 64px;
  }
}

/* ------------------------------ Buttons ------------------------------ */
.btn {
  --btn-bg: var(--rose);
  --btn-fg: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.9rem 1.5rem;
  border-radius: var(--r-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.98rem;
  line-height: 1;
  letter-spacing: 0.01em;
  white-space: nowrap;
  box-shadow: 0 10px 30px -14px rgba(24, 15, 13, 0.5);
  transition: transform var(--dur-fast) var(--ease-spring),
    box-shadow var(--dur-fast) var(--ease-out), background var(--dur-fast),
    color var(--dur-fast);
}

.btn:hover {
  transform: translate3d(0, -3px, 0);
  box-shadow: 0 0 0 1px rgba(255, 248, 240, 0.22),
    0 16px 40px -14px rgba(255, 47, 110, 0.6);
}

.btn:active {
  transform: translate3d(0, 0, 0);
}

.btn--primary {
  --btn-bg: var(--rose);
  --btn-fg: #fff;
  font-weight: 700;
  /* violet -> deep rose: both gradient ends keep white text >= 4.5:1 */
  background-image: linear-gradient(100deg, #6d5bff 0%, #c22a6e 100%);
}

.btn--mint {
  --btn-bg: var(--mint);
  --btn-fg: var(--ink);
}

.btn--cream {
  --btn-bg: var(--cream);
  --btn-fg: var(--ink);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: currentColor;
  border: 1.5px solid var(--line-strong, var(--line-dark-strong));
  box-shadow: none;
}

.btn--ghost:hover {
  border-color: currentColor;
  box-shadow: none;
}

.btn--sm {
  padding: 0.65rem 1.05rem;
  font-size: 0.86rem;
}

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

.btn__arrow {
  display: inline-block;
  transition: transform var(--dur-fast) var(--ease-out);
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

/* ------------------------------ Tags / chips ------------------------------ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.32rem 0.72rem;
  border: 1.5px solid var(--line);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.tag--rose {
  background: var(--rose);
  border-color: var(--rose);
  color: var(--ink);
}

.tag--mint {
  background: var(--mint);
  border-color: var(--mint);
  color: var(--ink);
}

.tag--coral {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--ink);
}

.tag--violet {
  background: var(--violet);
  border-color: var(--violet);
  color: #fff;
}

.tag--cream {
  background: var(--cream);
  border-color: var(--cream);
  color: var(--ink);
}

.tag--outline-light {
  background: transparent;
  border-color: rgba(255, 248, 240, 0.4);
  color: var(--tx-dark);
}

.num-chip {
  display: inline-grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: var(--r-sm);
  background: var(--ink);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
}

/* ------------------------------ Cards ------------------------------ */
.card {
  position: relative;
  padding: clamp(1.4rem, 2.4vw, 2.2rem);
  border-radius: var(--r-lg);
  background: var(--card-bg, var(--white));
  border: 1.5px solid var(--card-border, var(--line-light));
  transition: transform var(--dur) var(--ease-out),
    box-shadow var(--dur) var(--ease-out);
}

.card--hover:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-float);
}

.card--cream {
  background: var(--cream);
  border-color: rgba(24, 15, 13, 0.1);
}

.card--pink {
  background: var(--pink);
  border-color: transparent;
}

.card--mint {
  background: var(--mint-soft);
  border-color: transparent;
}

.card--ink {
  background: var(--ink);
  border-color: transparent;
  color: var(--tx-dark);
}

.card--hard {
  box-shadow: var(--shadow-hard);
}

.card--outline {
  background: transparent;
  border-color: var(--line-light-strong);
}

/* Feature card with big index number */
.feature-card {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  min-height: 240px;
}

.feature-card__no {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  opacity: 0.7;
}

.feature-card__title {
  font-size: clamp(1.25rem, 1.8vw, 1.6rem);
  line-height: 1.15;
}

/* Stats */
.stat__value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.4vw, 3.8rem);
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.stat__label {
  display: block;
  margin-top: 0.5rem;
  font-size: var(--fs-small);
  color: var(--fg-dim);
}

/* Section heading block */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.section-head__text {
  max-width: 720px;
}

.section-no {
  display: block;
  margin-bottom: 0.6rem;
  font-family: var(--font-mono);
  font-size: clamp(3.2rem, 8vw, 6rem);
  font-weight: 700;
  line-height: 0.82;
  color: transparent;
  -webkit-text-stroke: 2px rgba(24, 15, 13, 0.34);
}

.theme-dark-v2 .section-no,
.card--ink .section-no {
  -webkit-text-stroke-color: rgba(255, 248, 240, 0.46);
}

/* ------------------------------ Marquee ------------------------------ */
.marquee {
  overflow: hidden;
  white-space: nowrap;
  border-block: 1.5px solid var(--line, var(--line-light));
}

.marquee__track {
  display: inline-flex;
  align-items: center;
  gap: 2.2rem;
  padding-block: 1rem;
  will-change: transform;
  animation: marquee 26s linear infinite;
}

.marquee--reverse .marquee__track {
  animation-direction: reverse;
}

.marquee__item {
  display: inline-flex;
  align-items: center;
  gap: 2.2rem;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  letter-spacing: -0.01em;
}

.marquee__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.55;
}

@keyframes marquee {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(-50%, 0, 0);
  }
}

/* ------------------------------ Footer ------------------------------ */
.site-footer {
  background: var(--ink);
  color: var(--tx-dark);
  padding-block: clamp(3rem, 6vw, 5rem) 2rem;
}

.site-footer a {
  color: var(--tx-dark-dim);
  transition: color var(--dur-fast);
}

.site-footer a:hover {
  color: var(--tx-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 0.8fr));
  gap: clamp(2rem, 4vw, 4rem);
}

@media (max-width: 760px) {
  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--tx-dark-mute);
  margin-bottom: 1rem;
}

.footer-links {
  display: grid;
  gap: 0.6rem;
  font-size: 0.95rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-dark);
  font-size: var(--fs-small);
  color: var(--tx-dark-mute);
}

/* ------------------------------ Decorative ------------------------------ */
.deco-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(currentColor 1px, transparent 1px),
    linear-gradient(90deg, currentColor 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 72%);
  color: rgba(255, 248, 240, 0.3);
}

.halo {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.3;
  filter: blur(70px);
  will-change: transform;
}

.noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
}

/* ------------------------------ Motion ------------------------------ */
html.js .reveal,
html.js .reveal-l,
html.js .reveal-r,
html.js .reveal-scale {
  opacity: 0;
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}

html.js .reveal {
  transform: translate3d(0, 34px, 0);
}

html.js .reveal-l {
  transform: translate3d(-40px, 0, 0);
}

html.js .reveal-r {
  transform: translate3d(40px, 0, 0);
}

html.js .reveal-scale {
  transform: scale(0.94);
}

html.js .is-visible {
  opacity: 1 !important;
  transform: none !important;
}

.float-slow {
  animation: floaty 7s var(--ease-in-out) infinite;
}

@keyframes floaty {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(0, -14px, 0);
  }
}

@media (max-width: 900px) {
  /* horizontal reveals would push content sideways on narrow screens */
  html.js .reveal-l,
  html.js .reveal-r {
    transform: translate3d(0, 34px, 0);
  }
}

@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;
  }

  html.js .reveal,
  html.js .reveal-l,
  html.js .reveal-r,
  html.js .reveal-scale {
    opacity: 1;
    transform: none;
  }
}

/* ------------------------------ Utilities ------------------------------ */
.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 50%;
  z-index: 200;
  padding: 0.65rem 1.1rem;
  border-radius: var(--r-pill);
  background: var(--mint);
  color: var(--ink);
  font-weight: 700;
  transform: translate(-50%, -240%);
  transition: transform 0.25s var(--ease-out);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
}

.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;
}

.text-center {
  text-align: center;
}

.mt-4 {
  margin-top: 1rem;
}

.mt-5 {
  margin-top: 1.5rem;
}

.mt-6 {
  margin-top: 2rem;
}

.mt-7 {
  margin-top: 3rem;
}

/* Very small screens: keep sticky header + CTA inside 320px */
@media (max-width: 420px) {
  .site-header__inner {
    min-height: 60px;
    gap: 0.5rem;
  }

  .brand__mark {
    width: 28px;
    height: 28px;
  }

  .brand__name {
    font-size: 1rem;
  }

  .brand__insight {
    display: none;
  }

  .site-header__actions {
    gap: 0;
  }

  .site-header__actions .btn {
    padding: 0.55rem 0.75rem;
    font-size: 0.76rem;
  }

  .site-header__actions .btn .btn__arrow {
    display: none;
  }
}