/* ============================================================
   逐星AI · 视频制作  —  Analog-film editorial design system
   ============================================================ */

@font-face {
  font-family: 'Smiley Sans';
  src: url('../assets/fonts/SmileySans-Oblique.woff2') format('woff2');
  font-weight: 400 900;
  font-display: swap;
}

:root {
  /* — ink / paper — */
  --ink:        #0a0810;   /* violet-tinted near-black */
  --ink-2:      #16111f;   /* perceptibly lighter — gives rhythm between adjacent dark sections */
  --ink-3:      #1b1526;
  --ink-card:   #1b1526;
  --ink-line:   #2c2338;

  /* — violet family (sampled from deck) — */
  --violet-deep: #794a9d;
  --violet:      #aa72cf;
  --violet-br:   #c08cff;
  --lilac:       #f1d9ff;
  --lilac-soft:  #d9c2ef;

  /* — paper (lavender-tinted light) — */
  --paper:      #ece8f2;
  --paper-2:    #e3ddee;
  --paper-ink:  #18131f;     /* dark text on paper */
  --paper-mute: #5b5168;

  /* — rare lime accent (echoes final slide) — */
  --lime:       #c9f24e;

  /* — type — */
  --display: 'Smiley Sans', 'Noto Sans SC', sans-serif;
  --body:    'Noto Sans SC', sans-serif;
  --mono:    'Space Mono', ui-monospace, monospace;

  /* — text on dark — */
  --t-hi:   #f4eefa;
  --t-mid:  #c9bdd8;
  --t-lo:   #8a7d9b;

  --maxw: 1240px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--body);
  background: var(--ink);
  color: var(--t-hi);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
::selection { background: var(--violet); color: #fff; }

/* ---------- film grain + global texture ---------- */
.grain {
  position: fixed; inset: 0; z-index: 9999; pointer-events: none;
  opacity: .055; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 6s steps(6) infinite;
}
@keyframes grain {
  0%,100%{transform:translate(0,0)} 20%{transform:translate(-4%,3%)}
  40%{transform:translate(3%,-4%)} 60%{transform:translate(-3%,2%)} 80%{transform:translate(4%,-2%)}
}

/* halftone dot field for dark sections */
.halftone-bg {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image: radial-gradient(var(--violet-deep) 1.1px, transparent 1.3px);
  background-size: 16px 16px;
  opacity: .14;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 80% 0%, #000 0%, transparent 70%);
          mask-image: radial-gradient(ellipse 90% 70% at 80% 0%, #000 0%, transparent 70%);
}
.halftone-bg--light {
  background-image: radial-gradient(#1a0b2e 1.2px, transparent 1.4px);
  opacity: .12;
}

/* ---------- layout ---------- */
.wrap { width: min(100% - 3rem, var(--maxw)); margin-inline: auto; position: relative; z-index: 2; }
.section { position: relative; padding-block: clamp(4.5rem, 9vw, 8.5rem); overflow: hidden; scroll-margin-top: 70px; }
.section--ink   { background: var(--ink); }
.section--ink2  { background: var(--ink-2); }
.section--paper { background: var(--paper); color: var(--paper-ink); }
.section--violet{
  background:
    radial-gradient(120% 90% at 8% 12%, #3a1d57 0%, transparent 55%),
    radial-gradient(120% 120% at 100% 100%, #5a2f86 0%, transparent 50%),
    linear-gradient(160deg, #2a1640 0%, #160c24 100%);
  color: var(--t-hi);
}

/* ---------- type utilities ---------- */
.h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(2.2rem, 6vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: .01em;
}
.h2--ink { color: var(--paper-ink); }
.h2--xl { font-size: clamp(2.6rem, 7.5vw, 6rem); }

.eyebrow {
  font-family: var(--mono);
  font-size: clamp(.66rem, 1.4vw, .78rem);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--violet);
  display: flex; align-items: center; gap: .7em; flex-wrap: wrap;
  margin-bottom: 1.4rem;
}
.eyebrow--ink { color: var(--violet-deep); }
.eyebrow--ondark { color: var(--lilac); }
.eyebrow--center { justify-content: center; text-align: center; color: var(--lilac); }
.eyebrow__dot { color: var(--t-lo); font-size: .5em; }
.arrows { letter-spacing: -.1em; color: var(--violet); }
.eyebrow--ink .arrows { color: var(--violet-deep); }

/* highlight marks */
.hl { color: var(--violet-br); font-style: inherit; }
.u-fill {
  background: linear-gradient(180deg, transparent 62%, var(--violet) 62%);
  padding-inline: .05em;
}
.section--paper .u-fill { background: linear-gradient(180deg, transparent 60%, var(--lilac-soft) 60%); }
.u-fill--violet { background: linear-gradient(180deg, transparent 62%, var(--violet-deep) 62%); color: #fff; }
.u-mark {
  color: var(--violet-deep); font-family: var(--display);
  position: relative; white-space: nowrap;
}
.star { color: var(--violet-br); font-size: .7em; vertical-align: .15em; }
.dot { color: var(--violet); }

mark { background: var(--violet-deep); color: #fff; padding: .02em .28em; border-radius: 1px; }
.section--paper mark { background: var(--violet); }

/* ---------- buttons ---------- */
.btn {
  --pad: .95em 1.7em;
  display: inline-flex; align-items: center; gap: .6em;
  font-family: var(--mono); font-weight: 700;
  font-size: .82rem; letter-spacing: .06em;
  padding: var(--pad); border-radius: 2px; border: 1.5px solid transparent;
  cursor: pointer; transition: transform .35s var(--ease-out), background .25s, color .25s, box-shadow .35s;
  white-space: nowrap;
}
.btn span { transition: transform .35s var(--ease-out); }
.btn:hover span { transform: translateX(3px); }
.btn--solid { background: var(--violet); color: #160a22; box-shadow: 4px 4px 0 var(--violet-deep); }
.btn--solid:hover { transform: translate(-2px,-2px); box-shadow: 6px 6px 0 var(--violet-deep); }
.btn--ghost { border-color: var(--ink-line); color: var(--t-mid); background: rgba(255,255,255,.02); }
.btn--ghost:hover { border-color: var(--violet); color: var(--lilac); }
.btn--sm { font-size: .74rem; padding: .6em 1.1em; }

/* ---------- tags ---------- */
.tag {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .04em;
  padding: .5em .9em; border: 1px solid var(--ink-line); border-radius: 2px;
  color: var(--t-mid); background: rgba(170,114,207,.06); display: inline-block;
}
.section--paper .tag { border-color: rgba(121,74,157,.25); color: var(--paper-mute); background: rgba(121,74,157,.05); }
.tag-list { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 2rem; }
.tag--float {
  background: var(--violet); color: #18091f; border: none; font-weight: 700;
  transform: rotate(-1.5deg); box-shadow: 3px 3px 0 rgba(0,0,0,.4);
}

/* ============================================================
   FILMSTRIP — the signature motif
   ============================================================ */
.filmstrip {
  position: relative; z-index: 3;
  background: var(--ink-3);
  border-block: 1px solid var(--ink-line);
  overflow: hidden;
  --hole: 7px;
}
.filmstrip::before, .filmstrip::after {
  content: ""; position: absolute; left: 0; right: 0; height: var(--hole);
  background-image: radial-gradient(circle, var(--ink) 38%, transparent 42%);
  background-size: 22px var(--hole); background-position: center;
  z-index: 1; opacity: .9;
}
.filmstrip::before { top: 0; }
.filmstrip::after { bottom: 0; }
.filmstrip__track {
  display: flex; align-items: center; gap: 0; white-space: nowrap;
  padding-block: calc(var(--hole) + 6px);
  width: max-content;
  animation: marquee 40s linear infinite;
  font-family: var(--mono); font-size: .72rem; letter-spacing: .18em;
  color: var(--t-lo); text-transform: uppercase;
}
.filmstrip__track--rev { animation-direction: reverse; animation-duration: 46s; }
.filmstrip__track span { padding-inline: 1.4rem; }
.filmstrip__track i {
  width: 6px; height: 6px; background: var(--violet-deep);
  display: inline-block; transform: rotate(45deg); flex: none;
}
@keyframes marquee { to { transform: translateX(-50%); } }
.filmstrip--top { border-top: none; }
.filmstrip--foot { border-bottom: none; margin-top: 4rem; }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; gap: 1.5rem;
  padding: .85rem clamp(1rem, 3vw, 2.4rem);
  background: color-mix(in srgb, var(--ink) 72%, transparent);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  border-bottom: 1px solid transparent;
  transition: background .4s, border-color .4s, padding .4s;
}
.nav.is-scrolled { background: color-mix(in srgb, var(--ink) 92%, transparent); border-color: var(--ink-line); padding-block: .65rem; }
.nav__brand { display: flex; flex-direction: column; line-height: 1; margin-right: auto; position: relative; z-index: 10; }
.nav__mark { font-family: var(--display); font-size: 1.5rem; letter-spacing: .02em; color: var(--t-hi); }
.nav__mark-ai { color: var(--violet-br); }
.nav__sub { font-family: var(--mono); font-size: .52rem; letter-spacing: .42em; color: var(--t-lo); margin-top: .25em; }
.nav__links { display: flex; gap: clamp(.6rem, 1.8vw, 1.7rem); }
.nav__links a {
  font-size: .9rem; color: var(--t-mid); position: relative; padding: .2em 0;
  transition: color .25s;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--violet); transition: width .3s var(--ease-out);
}
.nav__links a:hover { color: var(--lilac); }
.nav__links a:hover::after, .nav__links a.is-active::after { width: 100%; }
.nav__links a.is-active { color: var(--t-hi); }
.nav__cta { background: var(--violet); color: #160a22 !important; box-shadow: 3px 3px 0 var(--violet-deep); }
.nav__cta:hover { background: var(--lilac); transform: translate(-1px,-1px); box-shadow: 4px 4px 0 var(--violet-deep); }
.nav__burger { display: none; align-items: center; justify-content: center; flex-direction: column; gap: 5px; width: 44px; height: 44px; margin-right: -8px; background: none; border: none; cursor: pointer; padding: 0; position: relative; z-index: 10; }
.nav__links-contact { display: none; }
.nav__burger span { width: 24px; height: 2px; background: var(--t-hi); transition: .3s var(--ease); }
.nav__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   i18n — anti-flash + language switcher
   ============================================================ */
html.i18n-pending [data-i18n] { visibility: hidden; }

.lang { position: relative; flex: none; z-index: 10; }
.lang__btn {
  display: flex; align-items: center; gap: .4rem; cursor: pointer;
  background: rgba(255,255,255,.04); border: 1px solid var(--ink-line); border-radius: 3px;
  color: var(--t-mid); font-family: var(--mono); font-size: .72rem; letter-spacing: .04em;
  padding: .5rem .7rem; transition: border-color .25s, color .25s, background .25s;
}
.lang__btn:hover { border-color: var(--violet); color: var(--lilac); }
.lang__btn svg { opacity: .85; flex: none; }
.lang__cur { white-space: nowrap; }
.lang__caret { font-size: .7em; opacity: .7; transition: transform .25s; }
.lang.is-open .lang__caret { transform: rotate(180deg); }
.lang__menu {
  position: absolute; top: calc(100% + .5rem); right: 0; min-width: 168px; list-style: none;
  background: var(--ink-2); border: 1px solid var(--ink-line); border-radius: 4px;
  padding: .4rem; margin: 0; display: flex; flex-direction: column; gap: 1px;
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity .22s var(--ease-out), transform .22s var(--ease-out), visibility .22s;
  box-shadow: 0 20px 44px -22px rgba(0,0,0,.75); z-index: 1100;
}
.lang.is-open .lang__menu { opacity: 1; visibility: visible; transform: none; }
.lang__menu button {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  color: var(--t-mid); font-family: var(--body); font-size: .92rem;
  padding: .55rem .8rem; border-radius: 2px; transition: background .2s, color .2s;
}
.lang__menu button:hover { background: rgba(170,114,207,.12); color: var(--lilac); }
.lang__menu button[aria-selected="true"] { color: var(--violet-br); background: rgba(170,114,207,.1); }
.lang__menu button[aria-selected="true"]::after { content: " ●"; font-size: .55em; vertical-align: .25em; }

/* Japanese: Smiley Sans lacks kana — use Noto Sans JP for correct glyphs */
html[lang="ja"] { --body: 'Noto Sans JP', 'Noto Sans SC', sans-serif; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; min-height: 100svh;
  display: flex; flex-direction: column; justify-content: space-between;
  background: var(--ink); padding-top: 0; overflow: hidden;
}
.hero__halftone {
  position: absolute; inset: 0; z-index: 0;
  background-image: radial-gradient(var(--violet-deep) 1.4px, transparent 1.6px);
  background-size: 20px 20px; opacity: .2;
  -webkit-mask-image: radial-gradient(circle at 50% 46%, #000 0%, transparent 62%);
          mask-image: radial-gradient(circle at 50% 46%, #000 0%, transparent 62%);
}
.hero__orb {
  position: absolute; z-index: 0; width: 46vw; height: 46vw; max-width: 640px; max-height: 640px;
  left: 50%; top: 46%; transform: translate(-50%,-50%);
  background: radial-gradient(circle, rgba(170,114,207,.32) 0%, rgba(121,74,157,.12) 38%, transparent 68%);
  filter: blur(8px);
  animation: breathe 9s var(--ease) infinite;
}
@keyframes breathe { 0%,100%{transform:translate(-50%,-50%) scale(1);opacity:.9} 50%{transform:translate(-50%,-50%) scale(1.12);opacity:1} }

.hero__inner {
  flex: 1; display: flex; flex-direction: column; justify-content: center; align-items: center;
  text-align: center; padding: 5rem clamp(1rem,4vw,2rem) 3rem; position: relative; z-index: 2;
}
.eyebrow--hero { justify-content: center; color: var(--lilac); margin-bottom: 2rem; }

.hero__title {
  font-family: var(--display); font-weight: 400;
  font-size: clamp(3.4rem, 13.5vw, 11rem);
  line-height: .9; letter-spacing: .005em; color: var(--t-hi);
  position: relative; margin-bottom: .2em;
}
.hero__line { display: block; }
.hero__title .hl { color: var(--violet-br); }
.hero__dot { color: var(--violet); }
.hero__script {
  display: block; font-family: var(--mono); font-style: italic; font-weight: 400;
  font-size: clamp(1rem, 3vw, 2rem); letter-spacing: .08em;
  color: var(--violet); margin-top: .3em; text-transform: none;
  opacity: .85;
}
.hero__lead {
  font-size: clamp(1.05rem, 2.6vw, 1.7rem); color: var(--t-mid);
  margin-top: 1.6rem; letter-spacing: .02em;
}
.hero__lead em { font-style: normal; color: var(--lilac); font-weight: 700; position: relative; }
.hero__cta { display: flex; gap: 1rem; margin-top: 2.4rem; flex-wrap: wrap; justify-content: center; }
.hero__meta { margin-top: 2.6rem; display: flex; flex-direction: column; align-items: center; gap: .9rem; }
.hero__meta-line { font-family: var(--mono); font-size: .68rem; letter-spacing: .2em; color: var(--t-lo); text-transform: uppercase; }

.hero__scroll {
  position: absolute; bottom: calc(var(--hole, 7px) + 64px); left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: .6rem; z-index: 4;
  font-family: var(--mono); font-size: .6rem; letter-spacing: .3em; color: var(--t-lo);
}
.hero__scroll-line { width: 1px; height: 38px; background: linear-gradient(var(--violet), transparent); position: relative; overflow: hidden; }
.hero__scroll-line::after { content:""; position:absolute; top:-50%; left:0; width:100%; height:50%; background: var(--lilac); animation: scrolldot 1.8s var(--ease) infinite; }
@keyframes scrolldot { to { top: 110%; } }

/* ============================================================
   ABOUT (paper)
   ============================================================ */
.about__head { max-width: 44rem; margin-bottom: clamp(2.5rem,5vw,4rem); }
.about__head .h2 { line-height: 1.14; }
.about__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; margin-bottom: clamp(2.5rem,5vw,4rem); }
.hl-card {
  background: #fff; border: 1px solid var(--paper-2); border-radius: 3px;
  padding: 1.8rem 1.6rem; position: relative; overflow: hidden;
  transition: transform .4s var(--ease-out), box-shadow .4s;
}
.hl-card::before { content:""; position:absolute; left:0; top:0; bottom:0; width:4px; background: var(--violet); }
.hl-card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px -22px rgba(60,30,90,.4); }
.hl-card__no { font-family: var(--mono); font-size: .8rem; color: var(--violet); letter-spacing: .1em; }
.hl-card__kicker { font-family: var(--mono); font-size: .62rem; letter-spacing: .22em; color: var(--paper-mute); display:block; margin: .5rem 0 1rem; text-transform: uppercase; }
.hl-card p { font-size: 1.02rem; color: #2b2235; line-height: 1.7; }
.hl-card b { color: var(--violet-deep); }
.hl-card--accent { background: var(--ink); color: var(--t-hi); }
.hl-card--accent::before { background: var(--lime); }
.hl-card--accent .hl-card p, .hl-card--accent p { color: var(--t-mid); }
.hl-card--accent .hl-card__no { color: var(--lilac); }
.hl-card--accent b { color: var(--lime); }

.about__body { font-size: clamp(1.05rem, 2vw, 1.3rem); line-height: 1.95; max-width: 60ch; color: #2b2235; }
.dropcap {
  float: left; font-family: var(--display); font-size: 3.4em; line-height: .8;
  color: var(--violet-deep); margin: .08em .12em -.1em 0;
}
.about__points {
  margin-top: 2.6rem; display: grid; gap: 1rem; max-width: 66ch;
  border-top: 1px solid var(--paper-2); padding-top: 2.2rem;
}
.about__points li { font-size: 1.05rem; color: #39303f; display: grid; grid-template-columns: auto 1fr; gap: 1.1rem; align-items: baseline; }
.about__points-k {
  font-family: var(--display); font-size: 1.1rem; color: #fff; background: var(--violet-deep);
  padding: .12em .7em; border-radius: 2px; justify-self: start; white-space: nowrap;
  min-width: 4.8em; text-align: center;
}

/* ============================================================
   STRENGTH / 两大底气
   ============================================================ */
.strength__head { margin-bottom: clamp(2.5rem,5vw,4rem); }
.pillars { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; align-items: start; }
.pillar {
  background: linear-gradient(165deg, var(--ink-card), var(--ink-2));
  border: 1px solid var(--ink-line); border-radius: 5px;
  padding: clamp(1.8rem,3vw,2.6rem); position: relative; height: 100%;
}
.pillar--proof { background: linear-gradient(165deg, #241834, #160f22); border-color: rgba(192,140,255,.3); }
.pillar__top { display: flex; gap: 1.1rem; align-items: flex-start; margin-bottom: 1.4rem; }
.pillar__idx { font-family: var(--display); font-size: clamp(2.4rem,5vw,3.4rem); color: var(--violet); line-height: .82; flex: none; }
.pillar__en { font-family: var(--mono); font-size: .6rem; letter-spacing: .2em; color: var(--t-lo); text-transform: uppercase; display: block; margin-bottom: .4rem; }
.pillar__title { font-family: var(--display); font-weight: 400; font-size: clamp(1.5rem,3vw,2rem); color: var(--t-hi); }
.pillar__lead { color: var(--t-mid); font-size: 1rem; margin-bottom: 1.6rem; }
.pillar__lead b { color: var(--lilac); font-family: var(--display); font-size: 1.05em; }
.pillar__list { display: grid; gap: 0; }
.pillar__list li { position: relative; padding: .9rem 0 .9rem 1.5rem; border-top: 1px solid var(--ink-line); color: var(--t-mid); font-size: .98rem; }
.pillar__list li:last-child { padding-bottom: 0; }
.pillar__list li::before { content: "▸"; position: absolute; left: 0; top: .9rem; color: var(--violet); }
.pillar__list b { color: var(--lilac); font-family: var(--display); font-size: 1.25em; vertical-align: -.02em; }

.proof-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-bottom: 1.6rem; }
.proof-stat { border-left: 3px solid var(--violet); padding-left: 1.1rem; }
.proof-stat__num { font-family: var(--display); font-weight: 400; font-size: clamp(2.1rem,5vw,3.1rem); color: var(--lilac); line-height: 1; display: block; }
.proof-stat__label { font-family: var(--mono); font-size: .62rem; letter-spacing: .06em; color: var(--t-lo); margin-top: .6rem; display: block; line-height: 1.6; }
.proof-badges { display: grid; gap: .6rem; }
.proof-badges li {
  font-family: var(--body); font-size: .88rem; color: var(--lilac);
  background: rgba(170,114,207,.1); border: 1px solid rgba(192,140,255,.24); border-radius: 2px;
  padding: .65em .9em .65em 2.2em; position: relative;
}
.proof-badges li::before { content: "★"; position: absolute; left: .85em; top: .65em; color: var(--violet-br); font-size: .85em; }

/* ============================================================
   DIFFERENT / 我们不一样
   ============================================================ */
.different__head { max-width: 60ch; margin-bottom: clamp(2.5rem,5vw,4rem); }
.different__intro { font-size: clamp(1rem,1.8vw,1.18rem); color: var(--t-mid); margin-top: 1.4rem; max-width: 60ch; }
.diffs { display: grid; gap: 1.4rem; }
.diff { border: 1px solid var(--ink-line); border-radius: 6px; overflow: hidden; background: var(--ink-2); transition: border-color .3s; }
.diff:hover { border-color: rgba(192,140,255,.38); }
.diff__head {
  padding: clamp(1.5rem,3vw,2.1rem) clamp(1.6rem,3vw,2.4rem);
  background: linear-gradient(120deg, rgba(170,114,207,.12), transparent 70%);
  border-bottom: 1px solid var(--ink-line);
  display: flex; align-items: center; gap: 1.3rem; flex-wrap: wrap;
}
.diff__tag { font-family: var(--display); font-size: 1.25rem; color: #170a22; background: var(--violet); padding: .22em .8em; border-radius: 2px; transform: rotate(-2deg); flex: none; }
.diff__vs { font-family: var(--display); font-weight: 400; font-size: clamp(1.35rem,3vw,2.1rem); color: var(--t-hi); line-height: 1.18; }
.diff__hl { color: var(--violet-br); }
.diff__cols { display: grid; grid-template-columns: 1fr 1.15fr; }
.diff__pit, .diff__us { padding: clamp(1.5rem,3vw,2.1rem) clamp(1.6rem,3vw,2.4rem); }
.diff__pit { background: rgba(0,0,0,.2); border-right: 1px solid var(--ink-line); }
.diff__col-k { font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; display: block; margin-bottom: 1.2rem; }
.diff__pit .diff__col-k { color: #c08585; }
.diff__us .diff__col-k { color: var(--violet-br); }
.diff__pit ul { display: grid; gap: .8rem; }
.diff__pit li { position: relative; padding-left: 1.4rem; color: #a294b8; font-size: .92rem; line-height: 1.65; }
.diff__pit li::before { content: "✕"; position: absolute; left: 0; top: .1em; color: #9e5a5a; font-size: .82em; }
.diff__us p { color: var(--t-mid); font-size: 1rem; margin-bottom: 1.1rem; }
.diff__us b { color: var(--lilac); }
.diff__mean {
  background: rgba(170,114,207,.12); border-left: 3px solid var(--violet);
  padding: .95rem 1.2rem; border-radius: 0 3px 3px 0;
  color: var(--t-hi) !important; font-size: .98rem !important; margin-bottom: 0 !important;
}
.diff__mean b { color: var(--lime); }

/* ============================================================
   FRAME (image frame — used by process section)
   ============================================================ */
.frame {
  position: relative; border: 1px solid var(--ink-line); padding: 10px;
  background: linear-gradient(160deg, var(--ink-3), var(--ink-2));
  border-radius: 3px;
}
.frame img { border-radius: 2px; filter: saturate(1.05) contrast(1.03); }
.frame figcaption {
  position: absolute; left: 18px; bottom: 18px;
  font-family: var(--mono); font-size: .66rem; letter-spacing: .14em; color: var(--t-hi);
  background: rgba(11,9,16,.7); backdrop-filter: blur(6px);
  padding: .4em .8em; border-radius: 2px; display: flex; align-items: center; gap: .5em;
}

/* ============================================================
   JOURNEY / timeline
   ============================================================ */
.journey__head { margin-bottom: clamp(2.5rem,5vw,4rem); }
.timeline {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border-top: 1px solid var(--ink-line); position: relative;
}
.timeline__item {
  padding: 2.2rem 1.5rem 2.5rem 0; position: relative; border-right: 1px solid var(--ink-line);
}
.timeline__item:last-child { border-right: none; }
.timeline__item::before {
  content:""; position: absolute; top: -7px; left: 0; width: 13px; height: 13px;
  background: var(--ink); border: 2px solid var(--violet); transform: rotate(45deg);
}
.timeline__item--now::before { background: var(--violet); box-shadow: 0 0 0 4px rgba(170,114,207,.2); }
.timeline__year { font-family: var(--mono); font-size: .82rem; letter-spacing: .08em; color: var(--violet-br); }
.timeline__en { display: block; font-family: var(--mono); font-size: .58rem; letter-spacing: .2em; color: var(--t-lo); margin: .5rem 0 .9rem; text-transform: uppercase; }
.timeline__title { font-family: var(--display); font-weight: 400; font-size: 1.7rem; color: var(--t-hi); margin-bottom: .8rem; }
.timeline__item p { font-size: .92rem; color: var(--t-mid); padding-right: .5rem; }
.timeline__item--now p { color: var(--lilac); }

.stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; margin-top: clamp(3rem,6vw,5rem); }
.stat { text-align: left; border-left: 3px solid var(--violet-deep); padding-left: 1.2rem; }
.stat__num { font-family: var(--display); font-weight: 400; font-size: clamp(2.6rem,6vw,4.6rem); line-height: 1; color: var(--lilac); display: block; }
.stat__label { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; color: var(--t-lo); margin-top: .4rem; display: block; }

/* ============================================================
   WHY-AI (violet) cards
   ============================================================ */
.whyai__head { max-width: 52rem; margin-bottom: clamp(2.5rem,5vw,4rem); }
.whyai__intro { font-size: clamp(1rem,1.8vw,1.2rem); color: var(--lilac-soft); margin-bottom: 2.2rem; max-width: 60ch; }
.whyai__intro b { color: #fff; }
.why-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.1rem; }
.why-card {
  background: rgba(11,9,16,.55); border: 1px solid rgba(192,140,255,.22);
  border-radius: 4px; padding: 1.8rem 1.5rem 2rem; position: relative;
  transition: transform .4s var(--ease-out), border-color .3s, background .3s;
  backdrop-filter: blur(4px);
}
.why-card:hover { transform: translateY(-8px); border-color: var(--violet-br); background: rgba(11,9,16,.7); }
.why-card__no { font-family: var(--mono); font-size: .8rem; color: var(--violet-br); letter-spacing: .1em; }
.why-card__title { font-family: var(--body); font-weight: 700; font-size: 1.06rem; color: var(--t-hi); margin: 1.6rem 0 .9rem; display: flex; align-items: baseline; gap: .6rem; }
.why-card__big { font-family: var(--display); font-weight: 400; font-size: 2.6rem; color: var(--violet-br); line-height: 1; }
.why-card p { font-size: .92rem; color: var(--t-mid); }
.why-card b { color: var(--lilac); }

/* ============================================================
   SERVICES (paper)
   ============================================================ */
.services__wrap { display: grid; grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); gap: clamp(2rem,5vw,4rem); align-items: start; }
.services__wrap > * { min-width: 0; }
.services__intro { position: sticky; top: 92px; }
.services__lead { font-size: 1.1rem; color: var(--paper-mute); margin: 1.4rem 0 2rem; line-height: 1.8; overflow-wrap: anywhere; }
.services__montage { position: relative; border: 1px solid var(--paper-2); padding: 8px; background: #fff; border-radius: 3px; box-shadow: 0 24px 50px -30px rgba(60,30,90,.5); max-width: 100%; overflow: hidden; }
.services__montage picture { display: block; width: 100%; }
.services__montage img { border-radius: 2px; width: 100%; height: auto; }
.services__montage figcaption { font-family: var(--mono); font-size: .64rem; letter-spacing: .14em; color: var(--paper-mute); padding: .7rem .3rem .2rem; text-transform: uppercase; }

.svc-list { display: flex; flex-direction: column; gap: 1rem; }
.svc {
  background: #fff; border: 1px solid var(--paper-2); border-radius: 4px;
  padding: 1.7rem 1.8rem; transition: transform .4s var(--ease-out), box-shadow .4s;
}
.svc:hover { transform: translateX(8px); box-shadow: -8px 12px 30px -20px rgba(60,30,90,.4); }
.svc__top { display: flex; align-items: center; gap: 1rem; margin-bottom: .8rem; }
.svc__no {
  font-family: var(--display); font-size: 1.4rem; color: #fff; background: var(--violet-deep);
  width: 2.4rem; height: 2.4rem; display: grid; place-items: center; border-radius: 3px; flex: none;
}
.svc__title { font-family: var(--display); font-weight: 400; font-size: 1.7rem; color: var(--paper-ink); }
.svc p { color: #4a4057; font-size: 1rem; }
.svc__tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1rem; }
.svc__tags span { font-family: var(--mono); font-size: .68rem; letter-spacing: .04em; color: var(--violet-deep); background: rgba(121,74,157,.08); padding: .35em .7em; border-radius: 2px; }

/* ============================================================
   PUNCH — pull-quote (used by the 我们不一样 section)
   ============================================================ */
.punch {
  margin-top: clamp(3rem,6vw,5rem); text-align: center;
  font-family: var(--display); font-weight: 400;
  font-size: clamp(1.6rem,4.5vw,3.4rem); line-height: 1.25; color: var(--t-hi);
  position: relative; padding: clamp(2rem,5vw,3.5rem) 1rem;
  border-block: 1px solid var(--ink-line);
}
.punch__lead { display: block; font-family: var(--mono); font-size: .72rem; letter-spacing: .3em; color: var(--violet); margin-bottom: 1.4rem; text-transform: uppercase; }
.punch__hl { color: var(--lime); position: relative; white-space: nowrap; }

/* ============================================================
   TRAINING
   ============================================================ */
.training__head { max-width: 64ch; margin-bottom: clamp(2.5rem,5vw,4rem); }
.training__intro { font-size: clamp(1rem,1.8vw,1.2rem); color: var(--t-mid); margin-top: 1.4rem; }
.training__intro b { color: var(--lilac); }
.train-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.2rem; }
.train {
  background: linear-gradient(165deg, var(--ink-card), var(--ink-2));
  border: 1px solid var(--ink-line); border-radius: 4px; padding: 2rem 1.8rem 2.2rem;
  position: relative; transition: transform .4s var(--ease-out), border-color .3s;
}
.train:hover { transform: translateY(-6px); border-color: var(--violet); }
.train__tag {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .14em; text-transform: uppercase;
  color: #170a22; background: var(--violet); padding: .35em .8em; border-radius: 2px; display: inline-block;
  transform: rotate(-2deg);
}
.train__title { font-family: var(--display); font-weight: 400; font-size: 1.45rem; color: var(--t-hi); margin: 1.4rem 0 .9rem; line-height: 1.2; }
.train p { color: var(--t-mid); font-size: .96rem; }

/* ============================================================
   PROCESS (dark split)
   ============================================================ */
.process__wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(2rem,5vw,4.5rem); align-items: center; }
.frame--tall { padding: 10px; }
.frame--tall img { aspect-ratio: 3/4.3; object-fit: cover; object-position: center 18%; width: 100%; }
.sticker {
  position: absolute; top: 24px; right: -10px; font-family: var(--mono); font-weight: 700;
  font-size: .7rem; letter-spacing: .1em; color: #170a22; background: var(--lilac);
  padding: .5em .9em; transform: rotate(3deg); box-shadow: 3px 3px 0 rgba(0,0,0,.35);
}
.steps { margin-top: 2.4rem; }
.step { display: grid; grid-template-columns: auto 1fr; gap: 1.5rem; padding: 1.4rem 0; border-top: 1px solid var(--ink-line); align-items: start; }
.step:last-of-type { border-bottom: 1px solid var(--ink-line); }
.step__no { font-family: var(--display); font-size: 2rem; color: var(--violet); line-height: 1; }
.step h3 { font-size: 1.2rem; color: var(--t-hi); margin-bottom: .3rem; font-weight: 700; }
.step p { color: var(--t-mid); font-size: .96rem; }
.process__punch { margin-top: 2.2rem; font-size: 1.1rem; color: var(--t-mid); }
.process__punch b { color: var(--lilac); }
.dash { color: var(--violet); }

/* ============================================================
   FAQ (paper)
   ============================================================ */
.faq__wrap { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(2rem,5vw,4rem); align-items: start; }
.faq__head { position: sticky; top: 92px; }
.faq__lead { color: var(--paper-mute); margin-top: 1.3rem; font-size: clamp(1rem,1.7vw,1.12rem); line-height: 1.8; max-width: 46ch; }
.faq__list { display: flex; flex-direction: column; border-top: 1px solid var(--paper-2); }
.faq__item { border-bottom: 1px solid var(--paper-2); padding: 0; }
.faq__item summary {
  cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  font-weight: 800; color: var(--paper-ink); padding: 1.4rem 0; font-size: clamp(1rem,1.7vw,1.18rem);
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+"; flex: none; width: 2rem; height: 2rem; display: grid; place-items: center;
  font-family: var(--mono); font-weight: 700; color: #fff; background: var(--violet-deep); border-radius: 3px;
}
.faq__item[open] summary::after { content: "-"; background: var(--paper-ink); }
.faq__item p { color: #4a4057; font-size: 1rem; line-height: 1.85; padding: 0 3rem 1.5rem 0; }

/* ============================================================
   CTA / CONTACT / FOOTER
   ============================================================ */
.cta { text-align: center; padding-bottom: 0 !important; }
.cta__wrap { padding-bottom: clamp(3rem,6vw,5rem); }
.cta__title {
  font-family: var(--display); font-weight: 400;
  font-size: clamp(3rem,11vw,9rem); line-height: .92; color: var(--t-hi);
  margin: 1.5rem 0 clamp(2.5rem,5vw,4rem); letter-spacing: .01em;
}
.cta__title .hl { color: var(--violet-br); }
.cta__grad {
  background: linear-gradient(95deg, var(--lime) 0%, var(--violet-br) 55%, var(--lilac) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.contact { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; max-width: 1000px; margin-inline: auto; text-align: left; }
.contact__card {
  background: var(--ink-card); border: 1px solid var(--ink-line); border-radius: 4px;
  padding: 1.7rem 1.6rem; position: relative; overflow: hidden;
  transition: transform .4s var(--ease-out), border-color .3s, background .3s;
  display: flex; flex-direction: column; gap: .5rem;
}
a.contact__card:hover { transform: translateY(-6px); border-color: var(--violet); background: var(--ink-3); }
.contact__k { font-family: var(--mono); font-size: .66rem; letter-spacing: .2em; color: var(--violet); text-transform: uppercase; }
.contact__v { font-size: 1.08rem; color: var(--t-hi); font-weight: 700; overflow-wrap: anywhere; line-height: 1.4; }
.contact__v--sm { font-size: 1.02rem; }
.contact__note { font-family: var(--mono); font-size: .66rem; letter-spacing: .1em; color: var(--t-lo); }
.contact__arrow { position: absolute; right: 1.4rem; bottom: 1.4rem; color: var(--violet); transition: transform .35s var(--ease-out); }
a.contact__card:hover .contact__arrow { transform: translate(4px,-4px); color: var(--lilac); }

.foot { border-top: 1px solid var(--ink-line); margin-top: clamp(3rem,6vw,5rem); }
.foot__inner { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding-block: 2rem; flex-wrap: wrap; }
.foot__brand { font-family: var(--display); font-size: 1.3rem; color: var(--t-hi); }
.foot__brand .hl { color: var(--violet-br); }
.foot__copy { font-family: var(--mono); font-size: .68rem; letter-spacing: .08em; color: var(--t-lo); }

/* ============================================================
   REVEAL / MOTION
   ============================================================ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal:nth-child(2) { transition-delay: .07s; }
.reveal:nth-child(3) { transition-delay: .14s; }
.reveal:nth-child(4) { transition-delay: .21s; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
.br-m { display: none; }
@media (max-width: 1080px) {
  .why-grid { grid-template-columns: repeat(2,1fr); }
  .services__wrap { grid-template-columns: 1fr; }
  .services__intro { position: static; }
  .faq__wrap { grid-template-columns: 1fr; }
  .faq__head { position: static; }
  .process__wrap { grid-template-columns: 1fr; }
  .process__media { max-width: 420px; }
  .pillars { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .nav__links { display: none; }
  .nav__links.is-open {
    display: flex; flex-direction: column; position: fixed; inset: 0 0 auto 0; top: 0;
    padding: 6rem 2rem 2rem; background: var(--ink); gap: 1.5rem; height: 100svh; z-index: 5;
  }
  .nav__links.is-open a { font-size: 1.6rem; font-family: var(--display); }
  .nav__burger { display: flex; }
  .nav__cta { display: none; }
  /* surface a contact CTA inside the mobile menu (the desktop button is hidden) */
  .nav__links-contact { display: block; margin-top: .6rem; padding-top: 1.6rem; border-top: 1px solid var(--ink-line); color: var(--violet-br) !important; }
  .nav__links-contact::after { display: none; }
  .about__grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr 1fr; }
  .timeline__item:nth-child(2) { border-right: none; }
  .timeline__item:nth-child(odd) { border-right: 1px solid var(--ink-line); }
  .stats { grid-template-columns: 1fr 1fr; gap: 2rem 1rem; }
  .train-grid { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; }
  .br-m { display: inline; }
  /* differentiator blocks: stack pit/us vertically */
  .diff__cols { grid-template-columns: 1fr; }
  .diff__pit { border-right: none; border-bottom: 1px solid var(--ink-line); }
}
@media (max-width: 560px) {
  .wrap { width: min(100% - 2rem, var(--maxw)); }
  .services__wrap { gap: 1.4rem; }
  .services__intro .h2 { font-size: clamp(2rem, 12vw, 3rem); line-height: 1.08; overflow-wrap: anywhere; }
  .services__lead { font-size: 1rem; line-height: 1.7; }
  .services__montage { padding: 6px; }
  .faq__item summary { align-items: flex-start; gap: 1rem; }
  .faq__item p { padding-right: 0; }
  .why-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .timeline__item { border-right: none !important; border-bottom: 1px solid var(--ink-line); }
  .stats { grid-template-columns: 1fr 1fr; }
  .hero__cta { flex-direction: column; width: 100%; max-width: 320px; }
  .hero__cta .btn { justify-content: center; }
  .foot__inner { flex-direction: column; text-align: center; }
  .proof-stats { grid-template-columns: 1fr; gap: 1.4rem; }
  .diff__head { gap: .9rem; }
}