/* ==========================================================
   Linthos 畅林科技 — linthos.com
   Design system v3 · Brand tokens: Linthos Brand Identity v2
   ========================================================== */
:root {
  /* brand */
  --navy: #001A4B;
  --cyan: #00D7DC;
  --deep: #061A3D;
  --ink: #0B1220;
  --cloud: #F8FAFC;

  /* backgrounds (deep tech navy) */
  --bg: #030C22;
  --bg-2: #061A3D;
  --bg-3: #0A1E44;

  /* text hierarchy (blue-tinted, cohesive) */
  --text: #EAF1FB;
  --text-soft: #A9BAD6;
  --text-faint: #7E90B2;

  /* surfaces & lines */
  --line: rgba(255, 255, 255, 0.10);
  --line-strong: rgba(0, 215, 220, 0.35);
  --surface: linear-gradient(165deg, rgba(255,255,255,.05), rgba(255,255,255,.015));
  --surface-flat: rgba(255, 255, 255, 0.04);
  --cyan-soft: rgba(0, 215, 220, 0.12);

  /* accents */
  --cyan-grad: linear-gradient(135deg, #00D7DC 0%, #34E3C4 100%);
  --shadow-card: 0 26px 60px -30px rgba(0, 0, 0, 0.75);
  --shadow-glow: 0 0 40px -6px rgba(0, 215, 220, 0.35);

  /* type scale */
  --fs-h1: clamp(34px, 4.8vw, 58px);
  --fs-h2: clamp(28px, 3.6vw, 42px);
  --fs-h3: 20px;
  --fs-body: 16px;
  --fs-small: 14px;

  --font: "Inter", "SF Pro Display", "PingFang SC", "HarmonyOS Sans SC",
          "MiSans", "Segoe UI", "Microsoft YaHei", "Noto Sans SC",
          "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1180px;
  --header-h: 72px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: var(--fs-body);
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

::selection { background: var(--cyan); color: var(--navy); }

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 200;
  background: var(--cyan-grad);
  box-shadow: 0 0 12px rgba(0, 215, 220, 0.55);
  transition: width .12s linear; will-change: width;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px;
  font-size: 15px; font-weight: 600; cursor: pointer;
  border: 1px solid transparent; white-space: nowrap;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              background .25s, color .25s, border-color .25s;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--cyan-grad); color: #062a2b;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 50px -4px rgba(0,215,220,.55); }
.btn-ghost { border-color: rgba(234,241,251,.25); color: var(--text); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-block { width: 100%; }
.btn .arrow { font-weight: 400; transform: translateY(-1px); }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(3, 12, 34, 0.6);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.site-header.scrolled { border-bottom-color: var(--line); background: rgba(3, 12, 34, 0.9); }

.header-inner {
  width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; flex-shrink: 0; }
.brand img { height: 42px; width: auto; }

.main-nav { display: flex; align-items: center; gap: 2px; }
.main-nav a {
  position: relative;
  padding: 8px 14px; border-radius: 10px;
  font-size: 16px; color: var(--text-soft); font-weight: 500;
  transition: color .2s;
  white-space: nowrap;
}
.main-nav a::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 3px; height: 2px;
  background: var(--cyan); border-radius: 2px;
  transform: scaleX(0); transform-origin: left;
  transition: transform .3s var(--ease);
}
.main-nav a:hover, .main-nav a.active { color: var(--text); }
.main-nav a:hover::after, .main-nav a.active::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

.lang-switch {
  display: inline-flex; align-items: center; gap: 2px;
  border: 1px solid var(--line); border-radius: 999px; padding: 3px;
  font-size: 13px;
}
.lang-switch a, .lang-switch span {
  padding: 3px 10px; border-radius: 999px; color: var(--text-soft);
}
.lang-switch .active { background: var(--cyan); color: var(--navy); font-weight: 600; }
.lang-switch a:hover { color: var(--text); }

/* burger */
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 8px;
}
.nav-toggle span {
  width: 22px; height: 2px; background: var(--text); border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; align-items: center;
  padding: calc(var(--header-h) + 76px) 0 100px;
  overflow: hidden;
  background:
    radial-gradient(1100px 520px at 78% -10%, rgba(0, 215, 220, 0.11), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(0, 30, 90, 0.55), transparent 65%),
    linear-gradient(180deg, #061430 0%, var(--bg) 62%);
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(248,250,252,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(248,250,252,.04) 1px, transparent 1px);
  background-size: 60px 60px;
  -webkit-mask-image: radial-gradient(ellipse 85% 70% at 50% 30%, #000 35%, transparent 78%);
  mask-image: radial-gradient(ellipse 85% 70% at 50% 30%, #000 35%, transparent 78%);
}

.hero-glow {
  position: absolute; border-radius: 50%; filter: blur(80px);
  opacity: .45; pointer-events: none;
}
.hero-glow-1 { width: 480px; height: 480px; background: rgba(0,215,220,.20); top: -120px; right: -80px; animation: float 14s ease-in-out infinite; }
.hero-glow-2 { width: 420px; height: 420px; background: rgba(0,80,200,.26); bottom: -140px; left: -60px; animation: float 18s ease-in-out infinite reverse; }
@keyframes float { 0%,100% { transform: translate(0,0); } 50% { transform: translate(30px,-30px); } }

/* logo-inspired S-curves sweeping across the full screen, edge-faded */
.hero-arcs {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 9%, #000 91%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 9%, #000 91%, transparent 100%);
}
.hero-arcs .rail { stroke-width: 2; stroke-linecap: round; fill: none; }
/* logo-style glowing dash clusters gliding along the rails */
.hero-arcs .run-c {
  stroke: var(--cyan); stroke-width: 4; stroke-linecap: round;
  filter: drop-shadow(0 0 5px rgba(0,215,220,.8));
}
.hero-arcs .run-c-dot {
  fill: var(--cyan);
  filter: drop-shadow(0 0 4px rgba(0,215,220,.7));
}
.hero-arcs .run-w {
  stroke: rgba(248,250,252,.8); stroke-width: 3.5; stroke-linecap: round;
  filter: drop-shadow(0 0 4px rgba(248,250,252,.45));
}
.hero-arcs .run-w-dot { fill: rgba(248,250,252,.8); }
.hero-arcs .drop {
  stroke: rgba(0,215,220,.5); stroke-width: 6; stroke-linecap: round;
  animation: pulse 3.2s ease-in-out infinite;
}
.hero-arcs .drop-w { stroke: rgba(248,250,252,.30); }
.hero-arcs .dot { fill: var(--cyan); animation: pulse 3.2s ease-in-out infinite; }
.hero-arcs .dot-w { fill: rgba(248,250,252,.6); }
.hero-arcs .dot-d { animation-delay: 1.4s; }
@keyframes pulse { 0%,100% { opacity: .2; } 50% { opacity: .85; } }

.hero-inner {
  position: relative; z-index: 2; max-width: 1000px; width: 100%;
  display: flex; flex-direction: column; justify-content: center;
  min-height: calc(100svh - var(--header-h) - 176px);
}

.hero h1 {
  font-size: var(--fs-h1);
  line-height: 1.18; font-weight: 800; letter-spacing: .005em;
  margin-bottom: 26px;
}
.hero h1 .accent {
  background: var(--cyan-grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-kicker {
  font-size: clamp(15px, 1.6vw, 20px); font-weight: 600;
  letter-spacing: .16em; margin-bottom: 22px; color: var(--text);
}
.hero-kicker .dot { color: var(--cyan); padding: 0 8px; font-weight: 800; }
.hero-sub {
  font-size: 16px; line-height: 1.9;
  color: var(--text-soft); max-width: 620px; margin-bottom: 38px;
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 16px; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  border-top: 1px solid var(--line); padding-top: 32px; max-width: 880px;
  margin-top: clamp(64px, 12vh, 140px);
}
.hero-stat b {
  display: block; font-size: clamp(24px, 2.6vw, 36px);
  font-weight: 800; color: #fff; line-height: 1.15;
  font-variant-numeric: tabular-nums;
}
.hero-stat small {
  display: block; font-size: 13.5px; font-weight: 400; color: var(--text-faint);
  margin-top: 6px; letter-spacing: .04em;
}

.scroll-cue {
  position: absolute; left: 50%; bottom: 34px; transform: translateX(-50%);
  width: 25px; height: 42px; border: 2px solid rgba(234,241,251,.28);
  border-radius: 999px; z-index: 3; display: block; cursor: pointer;
  transition: border-color .25s, box-shadow .25s, opacity .4s;
}
.scroll-cue::after {
  content: ""; position: absolute; left: 50%; top: 8px;
  width: 4px; height: 9px; margin-left: -2px; border-radius: 2px;
  background: var(--cyan); animation: cue 1.9s ease-out infinite;
}
.scroll-cue:hover { border-color: var(--cyan); box-shadow: 0 0 18px rgba(0,215,220,.45); }
.scroll-cue.faded { opacity: 0; pointer-events: none; }
@keyframes cue {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(14px); opacity: 0; }
  100% { transform: translateY(14px); opacity: 0; }
}

/* ---------- Sections ---------- */
.section { padding: 64px 0; position: relative; }
.section.alt {
  background: linear-gradient(180deg,
    rgba(10, 30, 68, 0) 0%,
    rgba(10, 30, 68, .38) 14%,
    rgba(10, 30, 68, .38) 86%,
    rgba(10, 30, 68, 0) 100%);
}

.section-head { max-width: 680px; margin: 0 0 44px; }
.section-eyebrow {
  display: inline-block;
  font-size: 13px; font-weight: 700; letter-spacing: .22em;
  text-transform: uppercase; color: var(--cyan); margin-bottom: 14px;
}
.section-head h2, .section-title {
  font-size: var(--fs-h2); font-weight: 800; line-height: 1.22;
  letter-spacing: .005em;
}
.section-head h2::after, .section-title::after {
  content: ""; display: block; width: 52px; height: 3px;
  margin: 20px 0 0;
  background: var(--cyan-grad); border-radius: 2px;
  box-shadow: 0 0 14px rgba(0,215,220,.5);
}
.section-head p { color: var(--text-soft); font-size: 16.5px; margin-top: 18px; }

/* ---------- Cards (services / solutions) ---------- */
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cards-4 .card { padding: 28px 24px; }
.cards-4 .card h3 { font-size: 18px; }
.cards-4 .card > p { margin-bottom: 0; }

.card {
  position: relative; overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: transform .35s var(--ease), border-color .35s, box-shadow .35s;
}
.card::after {
  content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  background: var(--cyan-grad);
  transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-card), 0 0 34px -10px rgba(0,215,220,.28);
}
.card:hover::after { transform: scaleX(1); }
.card-icon {
  width: 54px; height: 54px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--cyan-soft);
  margin-bottom: 24px;
  transition: transform .35s var(--ease), background .35s, box-shadow .35s;
}
.card-icon svg { width: 27px; height: 27px; stroke: var(--cyan); }
.card:hover .card-icon {
  transform: scale(1.08);
  background: rgba(0,215,220,.18);
  box-shadow: 0 0 18px rgba(0,215,220,.35);
}
.card h3 { font-size: var(--fs-h3); font-weight: 700; margin-bottom: 12px; }
.card > p { color: var(--text-soft); font-size: 15px; margin-bottom: 20px; }
.card ul { display: grid; gap: 10px; }
.card li {
  display: flex; gap: 11px; align-items: flex-start;
  font-size: 14.5px; color: var(--text-soft);
}
.card li::before {
  content: ""; flex-shrink: 0; width: 7px; height: 7px; border-radius: 50%;
  background: var(--cyan); margin-top: 9px;
  box-shadow: 0 0 8px rgba(0,215,220,.7);
}

/* ---------- Why ---------- */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.why-item {
  border-top: 2px solid rgba(0,215,220,.5);
  background: linear-gradient(180deg, rgba(0,215,220,.06), transparent 55%);
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 26px 22px 12px;
  transition: transform .35s var(--ease), background .35s, box-shadow .35s, border-color .35s;
}
.why-item:hover {
  transform: translateY(-4px);
  border-top-color: var(--cyan);
  background: linear-gradient(180deg, rgba(0,215,220,.12), transparent 60%);
  box-shadow: 0 20px 44px -26px rgba(0,0,0,.7);
}
.why-item .num {
  font-family: var(--mono);
  font-size: 13px; font-weight: 700; letter-spacing: .18em; color: var(--cyan);
  margin-bottom: 14px;
}
.why-item h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.why-item p { font-size: 14.5px; color: var(--text-soft); }

/* ---------- Partners ---------- */
.partners-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.partner-tile {
  background: var(--cloud);
  border: 1px solid transparent;
  border-radius: 14px;
  height: 92px;
  display: flex; align-items: center; justify-content: center;
  padding: 18px 26px;
  transition: transform .3s var(--ease), box-shadow .3s, border-color .3s;
}
.partner-tile:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 215, 220, 0.6);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.35), var(--shadow-glow);
}
.partner-tile img, .partner-tile svg {
  max-height: 40px; max-width: 100%; width: auto; object-fit: contain;
  transition: transform .35s var(--ease);
}
.partner-tile:hover img { transform: scale(1.06); }
/* SVGs sized in em units need an explicit height */
.partner-tile img[src$="bytedance.svg"],
.partner-tile img[src$="aws.svg"],
.partner-tile img[src$="google.svg"] { height: 32px; }
.partners-note { margin-top: 22px; font-size: 13px; color: var(--text-faint); }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.about-text p { color: var(--text-soft); font-size: 16px; margin-bottom: 18px; }
.about-text p strong { color: var(--text); font-weight: 600; }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.about-tags .tag {
  font-size: 14px; padding: 8px 16px;
  border: 1px solid var(--line); border-radius: 999px;
  color: var(--text); background: var(--surface-flat);
  transition: border-color .25s, background .25s, transform .25s var(--ease), color .25s;
}
.about-tags .tag:hover {
  border-color: rgba(0,215,220,.5); background: rgba(0,215,220,.08);
  transform: translateY(-2px); color: var(--cyan);
}
.mvv { display: grid; gap: 16px; }
.mvv-item {
  display: flex; gap: 18px; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px 24px;
  transition: transform .3s var(--ease), border-color .3s;
}
.mvv-item:hover { transform: translateY(-3px); border-color: var(--line-strong); }
.mvv-item .mvv-mark {
  flex-shrink: 0; width: 42px; height: 42px; border-radius: 12px;
  background: var(--cyan-soft);
  display: flex; align-items: center; justify-content: center;
}
.mvv-item .mvv-mark svg { width: 20px; height: 20px; stroke: var(--cyan); }
.mvv-item h3 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.mvv-item p { font-size: 14.5px; color: var(--text-soft); }

/* ---------- Careers / Join ---------- */
.careers { position: relative; overflow: hidden; }
.careers-bg { position: absolute; inset: 0; pointer-events: none; }
.careers-bg::after {
  content: ""; position: absolute; width: 680px; height: 680px; border-radius: 50%;
  top: -260px; left: 64%; transform: translateX(-50%);
  background: radial-gradient(circle, rgba(0,215,220,.13), transparent 60%); filter: blur(28px);
}
.careers .container { position: relative; z-index: 1; }
.careers-layout { display: grid; grid-template-columns: 0.86fr 1.14fr; gap: 48px; align-items: start; }
.careers-intro { display: flex; flex-direction: column; }
.careers-title { font-size: var(--fs-h2); font-weight: 800; letter-spacing: .005em; line-height: 1.15; }
.careers-title::after {
  content: ""; display: block; width: 48px; height: 3px; margin-top: 20px;
  background: var(--cyan-grad); border-radius: 2px; box-shadow: 0 0 14px rgba(0,215,220,.5);
}
.careers-lead { margin-top: 20px; color: var(--text-soft); font-size: 16px; max-width: 420px; }
.careers-values { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.careers-values li {
  font-size: 13.5px; color: var(--text-soft);
  padding: 8px 16px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface-flat);
  transition: color .25s, border-color .25s, background .25s, transform .25s var(--ease);
}
.careers-values li:hover {
  color: var(--text); border-color: rgba(0,215,220,.5);
  background: rgba(0,215,220,.07); transform: translateY(-2px);
}

.role-list { border-top: 1px solid var(--line); }
.role-row {
  position: relative; display: grid; grid-template-columns: auto 1fr auto;
  gap: 22px; align-items: center;
  padding: 21px 16px 21px 20px; border-bottom: 1px solid var(--line);
  transition: background .3s;
}
.role-row::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 3px; height: 0; background: var(--cyan-grad);
  border-radius: 0 3px 3px 0; box-shadow: 0 0 14px rgba(0,215,220,.7);
  transition: height .35s var(--ease);
}
.role-row:hover { background: linear-gradient(90deg, rgba(0,215,220,.07), transparent 75%); }
.role-row:hover::before { height: 66%; }
.role-no {
  font-family: var(--mono); font-weight: 700; font-size: 30px; letter-spacing: -.02em;
  background: var(--cyan-grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  opacity: .45; transition: opacity .3s var(--ease), transform .3s var(--ease);
}
.role-row:hover .role-no { opacity: 1; transform: translateX(2px); }
.role-main { min-width: 0; }
.role-main h3 { font-size: 18px; font-weight: 700; margin-bottom: 7px; line-height: 1.3; }
.role-main p { color: var(--text-soft); font-size: 14.5px; margin-bottom: 12px; max-width: 540px; }
.role-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.role-tags li {
  font-size: 12px; color: var(--cyan);
  padding: 4px 10px; border-radius: 6px;
  border: 1px solid rgba(0,215,220,.26); background: rgba(0,215,220,.06);
}
.role-apply {
  display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
  color: var(--text-soft); font-size: 14px; font-weight: 600;
  padding: 9px 18px; border: 1px solid var(--line); border-radius: 999px;
  transition: color .25s, border-color .25s, background .25s, transform .25s var(--ease);
}
.role-apply:hover { color: #062a2b; background: var(--cyan-grad); border-color: transparent; transform: translateY(-1px); }
.role-arrow { transition: transform .25s var(--ease); }
.role-apply:hover .role-arrow { transform: translateX(3px); }

.careers-apply {
  position: relative; margin-top: 52px;
  display: flex; flex-direction: column; align-items: flex-start; gap: 18px;
  padding: 28px 30px; border: 1px solid var(--line-strong); border-radius: var(--radius);
  background:
    radial-gradient(500px 200px at 0% 0%, rgba(0,215,220,.13), transparent 70%),
    var(--surface);
  max-width: 440px; width: 100%;
}
.careers-apply::before {
  content: ""; position: absolute; left: 0; top: 16px; bottom: 16px; width: 3px;
  border-radius: 0 3px 3px 0; background: var(--cyan-grad); box-shadow: 0 0 16px rgba(0,215,220,.7);
}
.apply-prompt { color: var(--text); font-size: 15px; font-weight: 500; padding-left: 12px; }
.apply-actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; padding-left: 12px; }
.careers-mail { color: var(--cyan); font-weight: 600; font-size: 14.5px; transition: color .2s; }
.careers-mail:hover { color: var(--text); }

/* ---------- Contact ---------- */
#join { padding-top: 44px; padding-bottom: 48px; }
#contact { padding-top: 48px; }
#contact .section-head { margin-bottom: 32px; }
.contact-wrap {
  background:
    radial-gradient(700px 320px at 85% 0%, rgba(0,215,220,.10), transparent 60%),
    var(--surface);
  border: 1px solid var(--line); border-radius: 24px;
  padding: 36px 44px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 44px;
}
.contact-info { display: flex; flex-direction: column; }
.contact-list {
  display: flex; flex-direction: column; justify-content: space-between;
  height: 100%; gap: 0;
}
.contact-item {
  display: flex; gap: 18px; align-items: center;
  padding: 18px 0; border-bottom: 1px solid var(--line);
}
.contact-item:first-child { padding-top: 4px; }
.contact-item:last-child { border-bottom: 0; padding-bottom: 4px; }
.contact-item .ci-icon {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
  background: var(--cyan-soft);
  display: flex; align-items: center; justify-content: center;
}
.contact-item .ci-icon svg { width: 20px; height: 20px; stroke: var(--cyan); }
.contact-item small {
  display: block; font-size: 12.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: 2px;
}
.contact-item a, .contact-item span.val { font-size: 16px; font-weight: 600; color: var(--text); }
.contact-item a:hover { color: var(--cyan); }
.contact-item .val.addr { font-size: 14.5px; font-weight: 500; line-height: 1.7; color: var(--text-soft); }

/* contact form */
.contact-form {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; background: var(--surface-flat);
}
.field { display: flex; flex-direction: column; gap: 7px; margin-bottom: 14px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label { font-size: 14px; color: var(--text-soft); font-weight: 500; }
.field input, .field textarea {
  width: 100%; padding: 13px 15px; border-radius: var(--radius-sm);
  border: 1px solid var(--line); background: rgba(2, 10, 28, .45);
  color: var(--text); font-family: inherit; font-size: 15px;
  transition: border-color .2s, box-shadow .2s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-faint); }
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,215,220,.18);
}
.field textarea { resize: vertical; }
.field input.invalid, .field textarea.invalid {
  border-color: #ff6b6b; box-shadow: 0 0 0 3px rgba(255,107,107,.15);
}
.form-hint { margin-top: 12px; font-size: 13px; color: var(--text-faint); text-align: center; }
.form-status { margin-top: 8px; font-size: 14px; text-align: center; color: var(--cyan); min-height: 18px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: #05091A; }
.footer-top {
  display: grid; grid-template-columns: 1.4fr .95fr .75fr 1.3fr; gap: 48px;
  padding: 60px 0 44px;
}
.footer-brand img { height: 40px; width: auto; margin-bottom: 22px; }
.footer-tagline { font-size: 15px; color: var(--text-soft); max-width: 300px; margin-bottom: 8px; }
.footer-tagline-sub { font-size: 13.5px; color: var(--text-faint); letter-spacing: .08em; }
.footer-col h4 {
  font-size: 13px; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: 20px;
}
.footer-col ul { display: grid; gap: 13px; }
.footer-col a { font-size: 14.5px; color: var(--text-soft); transition: color .2s; }
.footer-col a:hover { color: var(--cyan); }
.footer-col li { font-size: 14.5px; color: var(--text-soft); }
.footer-addr {
  margin-top: 8px; padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13.5px; line-height: 1.8; color: var(--text-faint);
}
.footer-addr-label {
  display: block; font-size: 12px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--text-faint); margin-bottom: 6px; opacity: .85;
}
.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 22px 0;
  display: flex; flex-wrap: wrap; gap: 10px 24px;
  align-items: center; justify-content: space-between;
  font-size: 13px; color: var(--text-faint);
}
.footer-bottom a { color: inherit; }
.footer-bottom a:hover { color: var(--cyan); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 44px; height: 44px; border-radius: 12px;
  background: rgba(6, 24, 56, .9); border: 1px solid var(--line);
  color: var(--cyan); font-size: 18px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .3s, transform .2s, border-color .2s;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { transform: translateY(-2px); border-color: var(--cyan); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .cards-3 { grid-template-columns: 1fr 1fr; }
  .cards-4 { grid-template-columns: 1fr 1fr; }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .partners-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .hero-arcs { opacity: .55; }
}
@media (max-width: 940px) {
  .careers-layout { grid-template-columns: 1fr; gap: 40px; }
  .careers-lead { max-width: none; }
  .careers-apply { max-width: none; }
}
@media (max-width: 860px) {
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: rgba(4, 18, 46, 0.98);
    border-bottom: 1px solid var(--line);
    padding: 12px 20px 18px;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: transform .25s, opacity .25s;
  }
  .main-nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .main-nav a { padding: 12px 14px; font-size: 16px; }
  .main-nav a::after { display: none; }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-wrap { grid-template-columns: 1fr; padding: 36px 28px; }
}
@media (max-width: 640px) {
  .section { padding: 52px 0; }
  .hero { padding-bottom: 88px; min-height: auto; }
  .hero-inner { min-height: auto; }
  .hero-stats { margin-top: 56px; }
  .scroll-cue { display: none; }
  .cards-3 { grid-template-columns: 1fr; }
  .cards-4 { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-tile { height: 80px; padding: 14px 20px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 20px; }
  .brand img { height: 36px; }
}
@media (max-width: 560px) {
  .role-row { grid-template-columns: auto 1fr; gap: 12px 16px; padding: 22px 6px 22px 16px; }
  .role-apply { grid-column: 2 / -1; justify-self: start; margin-top: 4px; }
  .role-no { font-size: 26px; }
  .careers-apply { flex-direction: column; align-items: flex-start; gap: 16px; padding: 24px; }
  .field-row { grid-template-columns: 1fr; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}