/* ============================================================
   星歌未来教育 · XINGGE EDU — design system
   Dark "training arena at night" · arena gold × vision cyan
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --ink-950: #05070D;
  --ink-900: #070A12;
  --ink-800: #0C1120;
  --ink-700: #131A2C;
  --ink-600: #1C2540;

  --text: #EEF2FB;
  --text-dim: #9AA6BD;
  --text-faint: #5C6B86;

  --line: rgba(238, 242, 251, .08);
  --line-strong: rgba(238, 242, 251, .16);

  --gold: #FFC84E;
  --gold-soft: #FFE08A;
  --gold-deep: #FF9E3D;
  --cyan: #3FD6F4;
  --cyan-soft: #5BE1FF;
  --cyan-deep: #2F7BFF;

  --grad-gold: linear-gradient(100deg, var(--gold-soft) 0%, var(--gold) 45%, var(--gold-deep) 100%);
  --grad-cyan: linear-gradient(100deg, var(--cyan-soft) 0%, var(--cyan) 45%, var(--cyan-deep) 100%);
  --grad-gold-cyan: linear-gradient(100deg, var(--gold-soft) 0%, var(--gold) 38%, var(--cyan) 78%, var(--cyan-deep) 100%);

  --font: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC",
          "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;

  --maxw: 1180px;
  --pad: clamp(20px, 5vw, 40px);
  --r: 18px;
  --r-sm: 12px;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--ink-900);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; font-weight: 800; letter-spacing: -.01em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
::selection { background: rgba(63, 214, 244, .28); color: #fff; }

/* ambient background: faint arena grid + glows */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 520px at 85% -8%, rgba(47, 123, 255, .14), transparent 60%),
    radial-gradient(820px 500px at -12% 22%, rgba(255, 158, 61, .10), transparent 60%),
    radial-gradient(1000px 700px at 50% 115%, rgba(63, 214, 244, .08), transparent 60%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(238, 242, 251, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(238, 242, 251, .025) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 75%);
          mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 75%);
}

/* ---------- Layout helpers ---------- */
.container { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad); }
.section { position: relative; padding-block: clamp(64px, 9vw, 120px); }
.section-tight { padding-block: clamp(44px, 6vw, 72px); }

/* section header pattern */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 600;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--grad-cyan); }
.eyebrow--gold { color: var(--gold); }
.eyebrow--gold::before { background: var(--grad-gold); }
.sec-head { max-width: 760px; }
.sec-head h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin: 14px 0 14px; }
.sec-head .lede { color: var(--text-dim); font-size: clamp(1rem, 1.6vw, 1.13rem); }
.sec-head.center { margin-inline: auto; text-align: center; }
.sec-head.center .eyebrow { justify-content: center; }

/* gradient display text */
.grad-gold { background: var(--grad-gold); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad-cyan { background: var(--grad-cyan); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad-mix  { background: var(--grad-gold-cyan); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 26px; border-radius: 999px;
  font-weight: 700; font-size: 15px; line-height: 1;
  cursor: pointer; border: 1px solid transparent;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease);
  white-space: nowrap;
}
.btn .arr { transition: transform .25s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }
.btn-primary { background: var(--grad-gold); color: #17110A; box-shadow: 0 6px 26px rgba(255, 200, 78, .28); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 34px rgba(255, 200, 78, .38); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line-strong); }
.btn-ghost:hover { transform: translateY(-2px); border-color: rgba(238,242,251,.4); background: rgba(238,242,251,.04); }
.btn-cyan { background: var(--grad-cyan); color: #04121A; box-shadow: 0 6px 26px rgba(63, 214, 244, .25); }
.btn-cyan:hover { transform: translateY(-2px); box-shadow: 0 10px 34px rgba(63, 214, 244, .34); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(7, 10, 18, .72);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; gap: 24px;
  height: 72px; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand .mark { height: 40px; width: auto; object-fit: contain; }
.brand .name { display: flex; flex-direction: column; line-height: 1.1; }
.brand .name b { font-size: 16.5px; letter-spacing: .02em; }
.brand .name span { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .3em; color: var(--text-faint); text-transform: uppercase; }
.nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.nav a {
  position: relative; padding: 9px 14px; border-radius: 10px;
  font-size: 15px; font-weight: 500; color: var(--text-dim);
  transition: color .2s, background .2s;
}
.nav a:hover { color: var(--text); background: rgba(238,242,251,.05); }
.nav a[aria-current="page"] { color: var(--text); }
.nav a[aria-current="page"]::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 5px;
  height: 2px; border-radius: 2px; background: var(--grad-gold-cyan);
}
.header-cta { display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: 999px;
  background: var(--grad-gold); color: #17110A; font-weight: 700; font-size: 14px;
  box-shadow: 0 4px 18px rgba(255,200,78,.25); transition: transform .25s var(--ease), box-shadow .25s var(--ease); }
.header-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 26px rgba(255,200,78,.35); }

.nav-toggle { display: none; background: none; border: 1px solid var(--line-strong); border-radius: 10px;
  width: 42px; height: 42px; cursor: pointer; color: var(--text); align-items: center; justify-content: center; }
.nav-toggle svg { width: 22px; height: 22px; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: clamp(70px, 10vw, 132px) 0 clamp(56px, 8vw, 100px); }
.hero::before {  /* perspective training-grid floor */
  content: "";
  position: absolute; left: 50%; bottom: -6%; width: 1600px; height: 780px;
  transform: translateX(-50%) perspective(620px) rotateX(62deg);
  transform-origin: 50% 100%;
  background-image:
    linear-gradient(rgba(63,214,244,.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,200,78,.10) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(to top, #000 8%, transparent 78%);
          mask-image: linear-gradient(to top, #000 8%, transparent 78%);
  pointer-events: none;
  z-index: 0;
}
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr); gap: 44px; align-items: center; }
.hero-kicker { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .24em;
  color: var(--gold); border: 1px solid rgba(255,200,78,.28); background: rgba(255,200,78,.07);
  padding: 8px 16px; border-radius: 999px; }
.hero-kicker::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 12px var(--gold); }
.hero h1 { font-size: clamp(2.5rem, 5.6vw, 4.35rem); line-height: 1.12; letter-spacing: -.02em; margin: 24px 0 20px; }
.hero h1 .grad-mix { display: inline-block; }
.hero-sub { max-width: 560px; color: var(--text-dim); font-size: clamp(1.02rem, 1.6vw, 1.18rem); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero-note { margin-top: 30px; display: flex; align-items: center; gap: 10px; color: var(--text-faint); font-size: 13px; }
.hero-note svg { width: 16px; height: 16px; stroke: var(--cyan); }

/* hero right: dual-track console */
.dual-console { display: grid; gap: 16px; }
.track {
  position: relative; overflow: hidden;
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 26px; background: linear-gradient(160deg, rgba(19,26,44,.9), rgba(12,17,32,.9));
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.track::after {  /* viewfinder corner ticks */
  content: ""; position: absolute; top: 0; left: 0; width: 46px; height: 46px;
  border-top: 3px solid var(--gold); border-left: 3px solid var(--gold);
  border-top-left-radius: var(--r);
  opacity: .85;
}
.track--ai::after { border-top: 3px solid var(--cyan); border-left: 3px solid var(--cyan); }
.track:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.track--esports:hover { box-shadow: 0 18px 44px rgba(255,158,61,.16); }
.track--ai:hover { box-shadow: 0 18px 44px rgba(63,214,244,.16); }
.track-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.track-tag { font-family: var(--font-mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; }
.track--esports .track-tag { color: var(--gold); }
.track--ai .track-tag { color: var(--cyan); }
.track-no { font-family: var(--font-mono); font-size: 34px; font-weight: 700; opacity: .16; }
.track h3 { font-size: 22px; margin: 16px 0 8px; }
.track--esports h3 { color: var(--gold); }
.track--ai h3 { color: var(--cyan); }
.track p { color: var(--text-dim); font-size: 14.5px; }
.track-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 16px; font-size: 14px; font-weight: 700; }
.track--esports .track-link { color: var(--gold); }
.track--ai .track-link { color: var(--cyan); }
.track-link svg { width: 16px; height: 16px; transition: transform .25s var(--ease); }
.track:hover .track-link svg { transform: translateX(4px); }

/* ---------- Cards / grids ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }

.card {
  position: relative;
  border: 1px solid var(--line); border-radius: var(--r);
  background: linear-gradient(170deg, rgba(19,26,44,.72), rgba(12,17,32,.85));
  padding: 26px;
  transition: transform .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: var(--line-strong); background: linear-gradient(170deg, rgba(24,32,52,.9), rgba(14,19,36,.9)); }
.card .ic { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 18px;
  background: rgba(238,242,251,.05); border: 1px solid var(--line); }
.card .ic svg { width: 24px; height: 24px; }
.card .ic--gold svg { stroke: var(--gold); }
.card .ic--cyan svg { stroke: var(--cyan); }
.card h3 { font-size: 18px; margin-bottom: 9px; }
.card p { color: var(--text-dim); font-size: 14.5px; }

/* feature icon */
.feature { display: flex; gap: 18px; align-items: flex-start; }
.feature .ic { flex: none; }
.feature h4 { font-size: 16.5px; margin-bottom: 6px; }
.feature p { color: var(--text-dim); font-size: 14px; }

/* ---------- Media frame (gallery) ---------- */
.frame {
  position: relative; border-radius: var(--r); overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}
.frame img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.frame:hover img { transform: scale(1.045); }
.frame::before, .frame::after {
  content: ""; position: absolute; width: 26px; height: 26px; z-index: 2; pointer-events: none;
}
.frame::before { top: 10px; left: 10px; border-top: 2px solid var(--gold); border-left: 2px solid var(--gold); }
.frame::after { bottom: 10px; right: 10px; border-bottom: 2px solid var(--cyan); border-right: 2px solid var(--cyan); }
.frame .cap {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 16px 14px;
  background: linear-gradient(to top, rgba(5,7,13,.9), transparent);
  font-size: 13px; color: var(--text);
}

/* ---------- Logo strip ---------- */
.logo-strip { display: flex; flex-wrap: wrap; gap: 14px; }
.logo-chip {
  flex: 1 1 150px; min-height: 84px;
  display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: var(--r-sm);
  background: rgba(12,17,32,.6); padding: 14px;
  transition: border-color .25s, transform .25s var(--ease);
}
.logo-chip:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.logo-chip img { max-height: 44px; object-fit: contain; filter: grayscale(1) contrast(.9) brightness(1.2); opacity: .8; transition: filter .3s, opacity .3s; }
.logo-chip:hover img { filter: none; opacity: 1; }
.logo-chip .txt { color: var(--text-dim); font-size: 14px; text-align: center; }

/* ---------- Testimonials ---------- */
.quote { position: relative; padding: 30px 30px 28px; }
.quote .who { display: flex; align-items: center; gap: 12px; margin-top: 20px; }
.quote .who .avatar { width: 42px; height: 42px; border-radius: 50%; flex: none;
  display: grid; place-items: center; font-weight: 800; color: #0B1220;
  background: var(--grad-gold); font-size: 17px; }
.quote .who .avatar--cyan { background: var(--grad-cyan); color: #04121A; }
.quote .who b { display: block; font-size: 14.5px; }
.quote .who span { color: var(--text-faint); font-size: 13px; }
.quote .mark { font-family: Georgia, serif; font-size: 54px; line-height: 0; color: var(--gold); height: 24px; display: block; }

/* ---------- Steps (real sequences only) ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step { position: relative; padding-top: 6px; }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .12em; color: var(--cyan);
  display: block; margin-bottom: 10px;
}
.step .bar { height: 3px; width: 100%; border-radius: 3px; background: linear-gradient(90deg, var(--cyan) var(--p, 0%), var(--line) var(--p, 0%)); margin-bottom: 16px; }
.step h4 { font-size: 16.5px; margin-bottom: 8px; }
.step p { color: var(--text-dim); font-size: 14px; }

/* ---------- Timeline ---------- */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--gold), var(--cyan)); opacity: .4; }
.tl-item { position: relative; padding: 0 0 26px 10px; }
.tl-item::before { content: ""; position: absolute; left: -27px; top: 8px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--ink-900); border: 3px solid var(--gold); }
.tl-item:nth-child(even)::before { border-color: var(--cyan); }
.tl-item time { font-family: var(--font-mono); font-size: 12.5px; color: var(--cyan); }
.tl-item h4 { font-size: 16.5px; margin: 4px 0 6px; }
.tl-item p { color: var(--text-dim); font-size: 14px; }

/* ---------- Course chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { padding: 8px 15px; border-radius: 999px; border: 1px solid var(--line-strong);
  font-size: 13.5px; color: var(--text-dim); background: rgba(238,242,251,.03); transition: all .2s; }
.chip:hover { border-color: var(--cyan); color: var(--text); background: rgba(63,214,244,.07); }

/* ---------- Table ---------- */
.data-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.data-table th, .data-table td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.data-table th { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-faint); }
.data-table td { color: var(--text-dim); }
.data-table td:first-child { color: var(--text); font-weight: 600; }
.data-table tr:hover td { background: rgba(238,242,251,.02); }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 14px; font-weight: 600; color: var(--text); }
.form-field input, .form-field select, .form-field textarea {
  background: rgba(238,242,251,.03); border: 1px solid var(--line-strong); color: var(--text);
  border-radius: var(--r-sm); padding: 13px 16px; font-family: inherit; font-size: 15px;
  transition: border-color .2s, box-shadow .2s, background .2s; width: 100%;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none; border-color: var(--cyan); background: rgba(63,214,244,.05);
  box-shadow: 0 0 0 3px rgba(63,214,244,.12);
}
.form-field textarea { resize: vertical; min-height: 130px; }
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--text-faint); }
.form-note { font-size: 13px; color: var(--text-faint); margin-top: 4px; }
.form-ok { display: none; align-items: center; gap: 10px; margin-top: 18px; padding: 14px 18px; border-radius: var(--r-sm);
  background: rgba(63,214,244,.08); border: 1px solid rgba(63,214,244,.3); color: var(--cyan-soft); font-size: 14.5px; }
.form-ok.show { display: flex; }

/* contact channel cards */
.mail-line {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 19px; font-weight: 600; letter-spacing: .02em;
  color: var(--cyan-soft); margin: 8px 0 20px;
  padding: 10px 18px; border: 1px solid rgba(63,214,244,.25); border-radius: var(--r-sm);
  background: rgba(63,214,244,.06);
}
.qr-placeholder {
  width: 168px; aspect-ratio: 1/1; margin: 14px 0 20px;
  display: grid; place-items: center; text-align: center;
  border: 2px dashed var(--line-strong); border-radius: var(--r-sm);
  color: var(--text-faint); font-size: 13px; line-height: 1.6;
  background: rgba(238,242,251,.02);
}
.qr-img {
  width: 168px; height: 168px; margin: 14px 0 20px;
  display: block; object-fit: contain;
  background: #fff; padding: 10px;
  border-radius: var(--r-sm); border: 1px solid var(--line-strong);
}
.contact-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.contact-list { display: grid; gap: 18px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-item .ic { flex: none; }

@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .form-field.full { grid-column: auto; }
}

/* ---------- CTA band ---------- */
.cta {
  position: relative; overflow: hidden; text-align: center;
  border-radius: 24px; border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(255,158,61,.10), rgba(12,17,32,.6) 40%, rgba(47,123,255,.12));
  padding: clamp(44px, 7vw, 80px) clamp(24px, 5vw, 60px);
}
.cta::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(238,242,251,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(238,242,251,.04) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 80% 100% at 50% 100%, #000 10%, transparent 70%);
          mask-image: radial-gradient(ellipse 80% 100% at 50% 100%, #000 10%, transparent 70%);
}
.cta > * { position: relative; z-index: 1; }
.cta h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); margin-bottom: 14px; }
.cta p { color: var(--text-dim); max-width: 560px; margin: 0 auto 30px; }
.cta .hero-cta { justify-content: center; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--ink-950); margin-top: clamp(40px, 6vw, 80px); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-block: clamp(44px, 6vw, 64px); }
.footer-brand p { color: var(--text-dim); font-size: 14px; margin-top: 16px; max-width: 320px; }
.footer-col h4 { font-size: 14px; letter-spacing: .08em; color: var(--text); margin-bottom: 18px; }
.footer-col a { display: block; color: var(--text-dim); font-size: 14px; padding: 5px 0; transition: color .2s; }
.footer-col a:hover { color: var(--gold); }
.footer-bottom { border-top: 1px solid var(--line); padding: 22px 0; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; color: var(--text-faint); font-size: 13px; }
.footer-bottom .mono { font-family: var(--font-mono); letter-spacing: .12em; }

/* ---------- Page hero (sub pages) ---------- */
.page-hero { padding: clamp(56px, 8vw, 96px) 0 clamp(40px, 6vw, 64px); border-bottom: 1px solid var(--line); position: relative; overflow: hidden; }
.page-hero .eyebrow { margin-bottom: 16px; }
.page-hero h1 { font-size: clamp(2rem, 4.6vw, 3.4rem); letter-spacing: -.02em; }
.page-hero .sub { color: var(--text-dim); max-width: 640px; margin-top: 16px; font-size: clamp(1rem, 1.6vw, 1.13rem); }
.page-hero::before {
  content: ""; position: absolute; left: 50%; bottom: -8%; width: 1200px; height: 420px;
  transform: translateX(-50%) perspective(700px) rotateX(64deg); transform-origin: 50% 100%;
  background-image:
    linear-gradient(rgba(63,214,244,.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,200,78,.08) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(to top, #000 6%, transparent 80%);
          mask-image: linear-gradient(to top, #000 6%, transparent 80%);
  pointer-events: none;
}
.breadcrumb { display: flex; gap: 8px; align-items: center; font-size: 13px; color: var(--text-faint); margin-bottom: 20px; }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb svg { width: 14px; height: 14px; }
.breadcrumb .now { color: var(--text-dim); }

/* ---------- Split feature rows ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: center; }
.split.reverse .split-media { order: -1; }
.split-media .frame { aspect-ratio: 4/3; }
.split-media.sq .frame { aspect-ratio: 1/1; }
.split .kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: .2em; color: var(--cyan); text-transform: uppercase; margin-bottom: 14px; }
.split .kicker--gold { color: var(--gold); }
.split h3 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); margin-bottom: 16px; }
.split p { color: var(--text-dim); margin-bottom: 12px; }
.split ul.tick { margin-top: 18px; display: grid; gap: 10px; }
.split ul.tick li { display: flex; gap: 10px; align-items: flex-start; color: var(--text-dim); font-size: 14.5px; }
.split ul.tick li::before { content: ""; flex: none; width: 18px; height: 18px; margin-top: 3px; border-radius: 50%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23FFC84E' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center/12px no-repeat, rgba(255,200,78,.12); }

/* ---------- Star student (single column spotlight) ---------- */
.star-wrap { max-width: 820px; margin-inline: auto; text-align: center; }
.star-wrap .kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: .2em; color: var(--gold); text-transform: uppercase; margin-bottom: 14px; }
.star-wrap h3 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); margin-bottom: 16px; }
.star-wrap p { color: var(--text-dim); margin-bottom: 12px; font-size: 15.5px; line-height: 1.85; }
.star-wrap ul.tick { margin-top: 28px; display: inline-grid; gap: 10px; text-align: left; }
.star-wrap ul.tick li { display: flex; gap: 10px; align-items: flex-start; color: var(--text-dim); font-size: 14.5px; }
.star-wrap ul.tick li::before { content: ""; flex: none; width: 18px; height: 18px; margin-top: 3px; border-radius: 50%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23FFC84E' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center/12px no-repeat, rgba(255,200,78,.12); }

/* Anchor targets clear the sticky header */
section[id] { scroll-margin-top: 88px; }

/* ---------- Two-tone accent row for dual pillars ---------- */
.pillar { border: 1px solid var(--line); border-radius: var(--r); padding: 34px; position: relative; overflow: hidden;
  background: linear-gradient(165deg, rgba(19,26,44,.85), rgba(12,17,32,.9)); }
.pillar--gold { border-top: 3px solid var(--gold); }
.pillar--cyan { border-top: 3px solid var(--cyan); }
.pillar h3 { font-size: 21px; margin-bottom: 10px; }
.pillar--gold h3 { color: var(--gold); }
.pillar--cyan h3 { color: var(--cyan); }
.pillar p { color: var(--text-dim); font-size: 14.5px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.card.reveal.in:hover { transform: translateY(-4px); }
.logo-chip.reveal.in:hover { transform: translateY(-2px); }

/* ---------- Mobile nav ---------- */
@media (max-width: 900px) {
  .nav { position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 4px; padding: 16px var(--pad) 24px; margin: 0;
    background: rgba(7,10,18,.97); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: .3s var(--ease); }
  .nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav a { padding: 14px; font-size: 16px; }
  .nav-toggle { display: inline-flex; }
  .header-cta { display: none; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* ---------- Focus / a11y ---------- */
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; border-radius: 4px; }
.skip-link { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--ink-700); color: var(--text); padding: 10px 16px; border-radius: 8px; }
.skip-link:focus { left: 8px; }

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