/* =========================================================
   SKYVONE UAV — Global Stylesheet
   Zero dependencies. Edit the tokens below to rebrand.
   ========================================================= */

:root {
  /* Brand — pulled from the Skyvone logo (navy airframe + light-blue propellers) */
  --ink:        #08172C;   /* hero / footer / dark sections — slightly lifted from pure black so navy accents can still read */
  --ink-2:      #0E2E52;   /* dark sections alt */
  --accent:     #0E2E52;   /* skyvone navy (primary) */
  --accent-dk:  #08223E;   /* hover */
  --accent-sf:  #EAF1F8;   /* accent soft bg */
  --accent-2:   #2BA8D9;   /* skyvone light blue (secondary, logo propeller) */
  --accent-2-sf:#E6F4FB;
  --accent-2-dk:#1F8FB9;
  --gold:       #C9A14A;   /* sparingly used, for premium "office" markers */

  /* Neutrals */
  --bg:         #FFFFFF;
  --bg-soft:    #F5F7F9;
  --bg-soft-2:  #EDF0F3;
  --line:       #E3E7EB;
  --line-dk:    #2A3038;

  /* Text — every value has >= 4.5:1 contrast against its intended background */
  --tx:         #0F1A2A;   /* was #16191D — darker so headings read on white */
  --tx-2:       #4F5965;
  --tx-3:       #8B949F;
  --tx-inv:     #FFFFFF;
  --tx-inv-2:   #C7D0DB;

  /* Shape */
  --r-sm: 6px;
  --r:    10px;
  --r-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(16,24,40,.05);
  --shadow:    0 4px 16px rgba(16,24,40,.07);
  --shadow-lg: 0 18px 48px rgba(16,24,40,.12);

  /* Layout */
  --max: 1240px;
  --nav-h: 72px;

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

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--tx);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
h1,h2,h3,h4 { margin: 0; line-height: 1.18; letter-spacing: -.02em; font-weight: 700; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

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

/* ---------- Layout helpers ---------- */
.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section--soft { background: var(--bg-soft); }
.section--ink { background: var(--ink); color: var(--tx-inv); }
.section--tight { padding: 64px 0; }

.grid { display: grid; gap: 28px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Typography ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 16px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--accent); }
.section--ink .eyebrow { color: var(--accent-2); }
.section--ink .eyebrow::before { background: var(--accent-2); }
.page-hero .eyebrow,
.hero .eyebrow { color: var(--accent-2); }
.page-hero .eyebrow::before,
.hero .eyebrow::before { background: var(--accent-2); }

.h1 { font-size: clamp(2.4rem, 5.2vw, 4rem); font-weight: 800; color: var(--tx); }
.h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); color: var(--tx); }
.h3 { font-size: 1.25rem; font-weight: 700; color: var(--tx); }
.lead { font-size: 1.125rem; color: var(--tx-2); }
.section--ink .lead,
.hero .lead,
.page-hero p { color: var(--tx-inv-2); }
.section--ink .h1,
.section--ink .h2,
.section--ink .h3 { color: var(--tx-inv); }
.hero .h1 { color: var(--tx-inv); }
.page-hero h1 { color: var(--tx-inv); }
.muted { color: var(--tx-2); }
.center { text-align: center; }
.sec-head { max-width: 720px; margin-bottom: 56px; }
.sec-head.center { margin-left: auto; margin-right: auto; }
.sec-head.split { max-width: none; }
.sec-head--platform { align-items: center; }
.sec-head--platform .split__body { padding-right: 8px; }
@media (max-width: 860px) {
  .sec-head--platform { grid-template-columns: 1fr; gap: 28px; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 26px; border-radius: var(--r-sm); border: 1px solid transparent;
  font-weight: 600; font-size: .95rem; cursor: pointer;
  transition: transform .18s var(--ease), background .18s var(--ease),
              border-color .18s var(--ease), box-shadow .18s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: #fff; box-shadow: 0 8px 20px rgba(14,46,82,.28); }
.btn--primary:hover { background: var(--accent-dk); }
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: #000; }
.btn--ghost { background: transparent; color: var(--tx); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--tx); }
.btn--outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.35); }
.btn--outline-light:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn--sm { padding: 10px 18px; font-size: .875rem; }
.btn--block { width: 100%; }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 90;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.site-header.is-stuck { border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }
.nav { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); }

.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; letter-spacing: -.02em; }
.logo__mark {
  width: 32px; height: 32px; border-radius: 7px; flex: none;
  background: linear-gradient(135deg, var(--accent), #2BA8D9);
  display: grid; place-items: center; color: #fff;
}
.logo__mark svg { width: 18px; height: 18px; }
.logo small { display: block; font-size: 10px; font-weight: 600; letter-spacing: .16em; color: var(--tx-3); line-height: 1; }
.logo__img { height: 48px; width: auto; display: block; }

.nav__menu { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative; padding: 10px 14px; font-size: .93rem; font-weight: 500; color: var(--tx-2);
  border-radius: var(--r-sm); transition: color .18s, background .18s;
}
.nav__link:hover { color: var(--tx); background: var(--bg-soft-2); }
.nav__link.is-active { color: var(--accent); font-weight: 600; }
.nav__cta { margin-left: 10px; }

.nav__toggle {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line);
  background: #fff; border-radius: var(--r-sm); cursor: pointer; padding: 0;
}
.nav__toggle span { display: block; width: 18px; height: 2px; background: var(--tx); margin: 4px auto; transition: .25s var(--ease); }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--ink); color: var(--tx-inv);
  min-height: 720px; display: flex; align-items: center;
}
.hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 520px at 82% 18%, rgba(43,168,217,.32), transparent 62%),
    radial-gradient(720px 520px at 6% 92%, rgba(43,168,217,.18), transparent 60%),
    linear-gradient(160deg, #0E2E52 0%, #08172C 55%, #0A1F3A 100%);
}
.hero__grid {
  position: absolute; inset: 0; opacity: .28;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(70% 70% at 50% 40%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(70% 70% at 50% 40%, #000 40%, transparent 100%);
}
/* swoosh — borrowed from the Skyvone logo curve, used as a soft brand motif */
.hero__swoosh {
  position: absolute; right: -120px; top: 8%; width: 720px; height: 720px;
  pointer-events: none; opacity: .45;
  background:
    radial-gradient(circle at 50% 50%, rgba(43,168,217,.22), transparent 60%);
}
.hero__swoosh::after {
  content: ""; position: absolute; inset: 0;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 600 600'><g fill='none' stroke='%232BA8D9' stroke-width='1.4' stroke-linecap='round' opacity='.7'><path d='M120 360 C 220 200, 380 200, 480 320'/><path d='M150 380 C 240 240, 360 240, 460 340' opacity='.6'/><path d='M180 400 C 260 280, 340 280, 440 360' opacity='.4'/><circle cx='480' cy='320' r='4' fill='%232BA8D9' stroke='none'/><circle cx='460' cy='340' r='3' fill='%232BA8D9' stroke='none' opacity='.7'/><circle cx='440' cy='360' r='2.4' fill='%232BA8D9' stroke='none' opacity='.5'/></g></svg>") center/contain no-repeat;
}

/* Brand banner inside hero — gives the logo real presence on first screen.
   White card with logo + a one-line company description + 3 trust pills. */
.hero__brandbar {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: auto 1fr; gap: 22px;
  align-items: center;
  background: rgba(255,255,255,.96);
  border: 1px solid rgba(14,46,82,.10);
  border-radius: var(--r);
  padding: 16px 22px;
  margin-bottom: 30px;
  box-shadow: 0 14px 36px rgba(8,23,44,.18);
  backdrop-filter: saturate(180%) blur(8px);
}
/* Logo is a 1920x1920 source square; main content (drone + skyvone text) sits
   in vertical 19.6%–73.8% of the source. Use a wider-than-tall frame with
   object-fit:cover + an upward object-position so we crop out the bottom
   whitespace and the tiny "豆包AI生成" watermark. */
.hero__brandlogo {
  width: 220px; height: 140px; display: block; flex: none;
  object-fit: cover; object-position: center 18%;
  border-right: 1px solid var(--line);
  padding-right: 18px;
}
.hero__brandline { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.hero__brandeyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent);
}
.hero__brandeyebrow::before { content: ""; width: 18px; height: 2px; background: var(--accent); }
.hero__brandcopy {
  font-size: .98rem; line-height: 1.45; color: var(--tx); margin: 0;
}
.hero__brandcopy strong { color: var(--accent); font-weight: 700; }
@media (max-width: 720px) {
  .hero__brandbar { grid-template-columns: 1fr; padding: 14px 16px; gap: 12px; }
  .hero__brandlogo { width: 180px; height: 114px; padding-right: 0; border-right: 0; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
}
.hero__inner {
  position: relative; padding: 110px 0 120px;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center;
}
.hero__copy { max-width: 640px; }
.hero__visual .media {
  border-radius: var(--r-lg); box-shadow: 0 30px 70px rgba(0,0,0,.45);
  border-color: rgba(255,255,255,.12);
}
.hero .h1 { margin-bottom: 22px; }
/* FIX: navy on near-black was invisible — use light blue on dark, navy on light */
.hero .h1 em { font-style: normal; color: var(--accent-2); }
.hero .lead { font-size: 1.15rem; margin-bottom: 34px; color: var(--tx-inv-2); }
.hero__badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 40px; }
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 13px; border-radius: 100px;
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.14);
  font-size: .8rem; font-weight: 500; color: var(--tx-inv-2);
}
.badge svg { width: 14px; height: 14px; color: var(--accent-2); flex: none; }
.section--ink .badge { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.12); color: var(--tx-inv-2); }
.section--ink .badge svg { color: var(--accent-2); }

/* FIX: the 46 / 3 / 12 / 4 stat strip on dark was using rgba(10,13,16) which fought
   the navy background. Now it sits on a transparent navy that harmonises with the hero. */
.hero__stats {
  position: relative; margin-top: 80px; display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: rgba(43,168,217,.18); border: 1px solid rgba(43,168,217,.22);
  border-radius: var(--r); overflow: hidden;
}
.hero__stat { background: rgba(8,23,44,.55); padding: 26px 22px; }
.hero__stat b { display: block; font-size: 1.8rem; font-weight: 800; letter-spacing: -.02em; color: var(--tx-inv); }
.hero__stat span { font-size: .82rem; color: var(--tx-inv-2); }

/* ---------- Media / placeholder ---------- */
/* Drop a real image into assets/images/ and name it as in the <img src>;
   if the file is missing, the styled placeholder below shows instead. */
.media {
  position: relative; overflow: hidden; border-radius: var(--r);
  background:
    radial-gradient(120% 120% at 20% 10%, rgba(14,46,82,.10), transparent 55%),
    radial-gradient(100% 100% at 90% 90%, rgba(43,168,217,.10), transparent 60%),
    linear-gradient(140deg, #EFF2F5, #DCE2E8);
  border: 1px solid var(--line);
}
.media::after {
  content: ""; position: absolute; inset: 0; opacity: .5;
  background-image:
    linear-gradient(rgba(14,17,20,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14,17,20,.05) 1px, transparent 1px);
  background-size: 34px 34px;
}
.media > img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; object-position: center 90%; }
.media__ph {
  position: absolute; inset: 0; z-index: 0;
  display: grid; place-items: center; gap: 10px; align-content: center;
  color: #96A1AC; text-align: center; padding: 20px;
}
.media__ph svg { width: 56px; height: 56px; opacity: .5; }
.media__ph span { font-size: .74rem; letter-spacing: .08em; text-transform: uppercase; font-weight: 600; }
.media--ink {
  background:
    radial-gradient(120% 120% at 20% 10%, rgba(14,46,82,.18), transparent 55%),
    radial-gradient(100% 100% at 90% 90%, rgba(43,168,217,.16), transparent 60%),
    linear-gradient(140deg, #1B222A, #0E1216);
  border-color: var(--line-dk);
}
.media--ink .media__ph { color: #6E7A87; }
.r-16-10 { aspect-ratio: 16/10; }
.r-4-3   { aspect-ratio: 4/3; }
.r-1-1   { aspect-ratio: 1/1; }
.r-21-9  { aspect-ratio: 21/9; }

/* ---------- Cards ---------- */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 28px; transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
  position: relative;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #D6DCE2; }
/* logo-style propeller arc on card hover */
.card--flat { padding: 0; overflow: hidden; }
.card--flat::before {
  content: ""; position: absolute; top: 16px; right: -40px; width: 120px; height: 60px;
  border: 2px solid transparent; border-top-color: var(--accent-2); border-right-color: var(--accent-2);
  border-radius: 0 60px 0 0; transform: rotate(-12deg);
  opacity: 0; transition: opacity .35s var(--ease), transform .35s var(--ease);
  pointer-events: none; z-index: 1;
}
.card--flat:hover::before { opacity: .55; transform: rotate(-6deg); }
.card__icon {
  width: 46px; height: 46px; border-radius: 10px; display: grid; place-items: center;
  background: var(--accent-sf); color: var(--accent); margin-bottom: 18px;
}
.card__icon svg { width: 22px; height: 22px; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--tx-2); font-size: .95rem; }

/* feature list */
.checklist li { display: flex; gap: 11px; padding: 8px 0; font-size: .95rem; color: var(--tx-2); align-items: flex-start; }
.checklist svg { width: 18px; height: 18px; color: var(--accent); flex: none; margin-top: 3px; }
.section--ink .checklist li { color: var(--tx-inv-2); }
.section--ink .checklist svg { color: var(--accent-2); }

/* ---------- Product ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.chip {
  padding: 9px 18px; border-radius: 100px; border: 1px solid var(--line);
  background: #fff; font-size: .88rem; font-weight: 500; cursor: pointer;
  transition: .18s var(--ease);
}
.chip:hover { border-color: var(--tx-3); }
.chip.is-active { background: var(--ink); border-color: var(--ink); color: #fff; }

.product { display: flex; flex-direction: column; }
.product__media { border-radius: var(--r-lg) var(--r-lg) 0 0; border: 0; }
.product__body { padding: 24px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.product__tag {
  align-self: flex-start; font-size: .72rem; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent); background: var(--accent-sf);
  padding: 4px 10px; border-radius: 4px;
}
.product__body p { font-size: .93rem; color: var(--tx-2); flex: 1; }
.product__specs { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 16px; padding-top: 14px; border-top: 1px solid var(--line); }
.product__specs div { font-size: .82rem; }
.product__specs dt { color: var(--tx-3); margin-bottom: 2px; }
.product__specs dd { margin: 0; font-weight: 600; }
.product__link {
  display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: .9rem; color: var(--accent);
}
.product__link svg { width: 15px; height: 15px; transition: transform .2s var(--ease); }
.product__link:hover svg { transform: translateX(4px); }

/* spec table */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); background: #fff; }
table.spec { width: 100%; border-collapse: collapse; min-width: 620px; }
table.spec th, table.spec td { padding: 15px 20px; text-align: left; border-bottom: 1px solid var(--line); font-size: .92rem; }
table.spec thead th { background: var(--bg-soft); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--tx-2); }
table.spec tbody tr:last-child td { border-bottom: 0; }
table.spec tbody tr:hover { background: #FAFBFC; }
table.spec td:first-child { font-weight: 600; }

/* ---------- Split / feature rows ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split--reverse .split__media { order: 2; }

/* ---------- Steps ---------- */
.steps { counter-reset: s; display: grid; gap: 24px; grid-template-columns: repeat(4, 1fr); }
.step { position: relative; padding-top: 22px; border-top: 2px solid var(--line); }
.step::before {
  counter-increment: s; content: "0" counter(s);
  position: absolute; top: -13px; left: 0; background: var(--bg); padding-right: 12px;
  font-size: .82rem; font-weight: 800; color: var(--accent); letter-spacing: .06em;
}
.section--soft .step::before { background: var(--bg-soft); }
.step h4 { font-size: 1rem; margin-bottom: 8px; }
.step p { font-size: .9rem; color: var(--tx-2); }

/* ---------- Testimonial ---------- */
.quote { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 32px; }
.quote__stars { color: #FFB020; letter-spacing: 2px; font-size: .9rem; margin-bottom: 14px; }
.quote p { font-size: 1rem; color: var(--tx); margin-bottom: 20px; }
.quote__by { display: flex; align-items: center; gap: 12px; font-size: .88rem; }
.quote__avatar {
  width: 40px; height: 40px; border-radius: 50%; background: var(--bg-soft-2);
  display: grid; place-items: center; font-weight: 700; color: var(--tx-2); flex: none;
}
.quote__by b { display: block; }
.quote__by span { color: var(--tx-3); font-size: .82rem; }

/* ---------- CTA band ---------- */
.cta-band {
  background:
    radial-gradient(700px 320px at 85% 20%, rgba(43,168,217,.30), transparent 60%),
    linear-gradient(120deg, #141A20, #0B0E11);
  color: #fff; border-radius: var(--r-lg); padding: 64px; text-align: center;
}
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { color: var(--tx-inv-2); max-width: 560px; margin: 0 auto 30px; }
.cta-band .btn-row { justify-content: center; }

/* ---------- Form ---------- */
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 36px; box-shadow: var(--shadow-sm); }
.field { margin-bottom: 20px; }
.field > label { display: block; font-size: .86rem; font-weight: 600; margin-bottom: 7px; }
.field > label .req { color: var(--accent); }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--r-sm);
  background: #fff; transition: border-color .18s, box-shadow .18s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 0; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(14,46,82,.14);
}
.field textarea { min-height: 120px; resize: vertical; }
.field--row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
.field .err { display: none; font-size: .8rem; color: #D92D20; margin-top: 6px; }
.field.has-error input, .field.has-error select, .field.has-error textarea { border-color: #D92D20; }
.field.has-error .err { display: block; }
.form-note { font-size: .82rem; color: var(--tx-3); margin-top: 14px; }
.form-status { display: none; padding: 14px 16px; border-radius: var(--r-sm); margin-bottom: 20px; font-size: .9rem; }
.form-status.is-ok { display: block; background: #ECFDF3; border: 1px solid #ABEFC6; color: #05603A; }
.form-status.is-err { display: block; background: #FEF3F2; border: 1px solid #FECDCA; color: #B42318; }

/* ---------- Contact blocks ---------- */
.contact-item { display: flex; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.contact-item:last-child { border-bottom: 0; }
.contact-item__icon {
  width: 44px; height: 44px; border-radius: 10px; background: var(--accent-sf); color: var(--accent);
  display: grid; place-items: center; flex: none;
}
.contact-item__icon svg { width: 20px; height: 20px; }
.contact-item b { display: block; font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--tx-3); margin-bottom: 4px; }
.contact-item a, .contact-item p { font-size: 1rem; font-weight: 500; }
.contact-item a:hover { color: var(--accent); }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--line); }
.faq__item { border-bottom: 1px solid var(--line); }
.faq__q {
  width: 100%; background: 0; border: 0; padding: 20px 0; text-align: left; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  font-weight: 600; font-size: 1rem;
}
.faq__q i { flex: none; width: 22px; height: 22px; position: relative; }
.faq__q i::before, .faq__q i::after {
  content: ""; position: absolute; background: var(--tx-2); transition: transform .25s var(--ease);
  left: 50%; top: 50%;
}
.faq__q i::before { width: 14px; height: 2px; transform: translate(-50%,-50%); }
.faq__q i::after  { width: 2px; height: 14px; transform: translate(-50%,-50%); }
.faq__item.is-open .faq__q i::after { transform: translate(-50%,-50%) rotate(90deg); opacity: 0; }
.faq__a { max-height: 0; overflow: hidden; transition: max-height .3s var(--ease); }
.faq__a p { padding: 0 0 20px; color: var(--tx-2); font-size: .95rem; }

/* ---------- Logo strip ---------- */
.logo-strip { display: flex; flex-wrap: wrap; gap: 40px; align-items: center; justify-content: center; }
.logo-strip span { font-size: 1.05rem; font-weight: 700; color: var(--tx-3); letter-spacing: .02em; opacity: .75; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: var(--tx-inv-2); padding: 72px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid var(--line-dk); }
.site-footer .logo { color: #fff; margin-bottom: 16px; }
.site-footer .logo small { color: #6E7A87; }
.site-footer p { font-size: .92rem; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 18px; }
.footer-col li { margin-bottom: 11px; }
.footer-col a { font-size: .92rem; transition: color .18s; }
.footer-col a:hover { color: var(--accent-2); }
.socials { display: flex; gap: 10px; margin-top: 20px; }
.socials a {
  width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line-dk);
  display: grid; place-items: center; transition: .18s var(--ease);
}
.socials a:hover { border-color: var(--accent-2); color: var(--accent-2); }
.socials svg { width: 17px; height: 17px; }
.footer-bottom {
  padding-top: 24px; display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: space-between; font-size: .84rem; color: #6E7A87;
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .btn:hover, .card:hover { transform: none; }
}

/* ---------- Placeholder for data you still need to fill in ----------
   所有 class="tbd" 的位置都是「待填数据」，上线前替换成真实内容。 */
.tbd {
  display: inline-block; min-width: 46px; padding: 0 9px;
  border: 1px dashed var(--accent); border-radius: 4px;
  background: var(--accent-sf); color: var(--accent);
  font-size: .85em; font-weight: 700; text-align: center;
}

/* ---------- Inner page hero ---------- */
.page-hero { position: relative; overflow: hidden; background: var(--ink); color: #fff; padding: 86px 0 76px; }
.page-hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(760px 380px at 82% 12%, rgba(43,168,217,.28), transparent 62%),
    radial-gradient(600px 380px at 4% 96%, rgba(43,168,217,.16), transparent 60%),
    linear-gradient(150deg, #0E2E52, #08172C 65%, #0A1F3A 100%);
}
.page-hero__bg::after {
  content: ""; position: absolute; inset: 0; opacity: .18;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(70% 70% at 50% 40%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(70% 70% at 50% 40%, #000 40%, transparent 100%);
}
.page-hero__inner { position: relative; max-width: 760px; }
.page-hero h1 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 16px; }
.page-hero p { color: var(--tx-inv-2); font-size: 1.06rem; }

.breadcrumb { display: flex; gap: 9px; align-items: center; font-size: .84rem; color: var(--tx-inv-2); margin-bottom: 18px; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { opacity: .5; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .g-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .split { gap: 44px; }
  .hero__inner { grid-template-columns: 1fr; gap: 40px; padding: 72px 0 80px; }
  .hero__visual { display: none; }
}
@media (max-width: 860px) {
  .nav__menu {
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 12px 24px 22px; box-shadow: var(--shadow);
    display: none;
  }
  .nav__menu.is-open { display: flex; }
  .nav__link { padding: 13px 0; border-bottom: 1px solid var(--bg-soft-2); }
  .nav__cta { margin: 14px 0 0; }
  .nav__toggle { display: block; }
  .section { padding: 68px 0; }
  .g-2, .g-3, .g-4 { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .split--reverse .split__media { order: 0; }
  .hero { min-height: auto; }
  .hero__inner { padding: 64px 0 72px; }
  .hero__stats { grid-template-columns: 1fr 1fr; margin-top: 48px; }
  .cta-band { padding: 44px 24px; }
  .field--row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .form-card { padding: 24px; }
}
@media (max-width: 520px) {
  .steps { grid-template-columns: 1fr; }
  .product__specs { grid-template-columns: 1fr; }
  .btn-row .btn { width: 100%; }
}