/* =========================================================
   Sanderland — Modern Export Website
   Palette: deep blue-black · electric blue · minimal premium
   ========================================================= */

:root {
  --ink: #04070f;
  --ink-2: #070c18;
  --panel: #0b1322;
  --panel-2: #0e1830;
  --line: rgba(133, 168, 255, .12);
  --line-strong: rgba(133, 168, 255, .22);

  --blue: #3d8bff;
  --blue-deep: #1f5fe0;
  --blue-bright: #7ab0ff;
  --cyan: #56d4ff;

  --text: #eaf0fb;
  --text-soft: #aab7cf;
  --muted: #7886a1;

  --grad-blue: linear-gradient(120deg, #1f5fe0 0%, #3d8bff 55%, #6ea8ff 100%);
  --grad-ink: linear-gradient(180deg, #070c18 0%, #04070f 100%);

  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 24px 70px -28px rgba(10, 40, 110, .55);
  --glow: 0 0 60px -12px rgba(61, 139, 255, .45);

  --font-head: "Manrope", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container: 1200px;
  --header-h: 84px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  background: var(--ink);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; color: inherit; }

::selection { background: rgba(61, 139, 255, .35); color: #fff; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: #1b2944; border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: #2a3f66; }

/* ---------- Layout helpers ---------- */
.container { width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }

.section { padding: 120px 0; position: relative; }
.section-tight { padding: 90px 0; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12.5px; font-weight: 700; letter-spacing: .22em; text-transform: uppercase;
  color: var(--blue-bright);
}
.eyebrow::before {
  content: ""; width: 26px; height: 1px;
  background: var(--grad-blue);
}
.eyebrow.center::after {
  content: ""; width: 26px; height: 1px;
  background: var(--grad-blue);
}

.section-head { max-width: 680px; margin-bottom: 64px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head h2 {
  font-family: var(--font-head);
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 800; line-height: 1.18; letter-spacing: -.02em;
  margin: 18px 0 16px;
}
.section-head p { color: var(--text-soft); font-size: 17px; }

.text-gradient {
  background: linear-gradient(110deg, #fff 10%, #9cc2ff 60%, #56a0ff 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 30px; border-radius: 999px;
  font-weight: 700; font-size: 15px; letter-spacing: .01em;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .3s ease, box-shadow .3s ease, background .3s ease, border-color .3s ease;
  white-space: nowrap;
}
.btn svg { width: 17px; height: 17px; transition: transform .3s ease; }
.btn-primary {
  background: var(--grad-blue); color: #fff;
  box-shadow: 0 14px 34px -12px rgba(47, 124, 246, .75);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 20px 44px -12px rgba(47, 124, 246, .85); }
.btn-primary:hover svg { transform: translateX(3px); }
.btn-ghost {
  background: rgba(255, 255, 255, .04);
  border-color: var(--line-strong); color: var(--text);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { border-color: var(--blue); background: rgba(61, 139, 255, .12); transform: translateY(-2px); }
.btn-sm { padding: 11px 22px; font-size: 13.5px; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--blue-bright); font-weight: 700; font-size: 14.5px;
  transition: gap .3s ease;
}
.link-arrow svg { width: 16px; height: 16px; }
.link-arrow:hover { gap: 13px; }

/* =========================================================
   HEADER
   ========================================================= */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  transition: background .35s ease, border-color .35s ease, height .35s ease, backdrop-filter .35s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  height: 68px;
  background: rgba(5, 9, 18, .82);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }

.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo img { height: 38px; width: auto; filter: brightness(0) invert(1); opacity: .92; }
.logo-mark {
  width: 38px; height: 38px; border-radius: 11px;
  background: var(--grad-blue);
  display: grid; place-items: center;
  font-family: var(--font-head); font-weight: 800; font-size: 17px; color: #fff;
  box-shadow: 0 8px 22px -8px rgba(47, 124, 246, .8);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-text strong { font-family: var(--font-head); font-size: 16.5px; font-weight: 800; letter-spacing: .12em; }
.logo-text span { font-size: 10px; letter-spacing: .24em; color: var(--muted); text-transform: uppercase; }

.main-nav { flex-shrink: 0; }
.main-nav ul { display: flex; align-items: center; gap: 2px; }
.main-nav a {
  position: relative;
  display: block; padding: 10px 13px;
  font-size: 14px; font-weight: 600; color: var(--text-soft);
  border-radius: 999px; white-space: nowrap;
  transition: color .25s ease;
}
.main-nav a:hover { color: #fff; }
.main-nav a.active { color: #fff; }
.main-nav a.active::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; transform: translateX(-50%);
  width: 18px; height: 2px; border-radius: 2px; background: var(--grad-blue);
}
.header-cta { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.header-contact { display: flex; align-items: center; gap: 9px; font-size: 13.5px; font-weight: 600; color: var(--text-soft); }
.header-contact svg { width: 16px; height: 16px; color: var(--blue-bright); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px; border-radius: 12px;
  background: rgba(255,255,255,.05); border: 1px solid var(--line);
  cursor: pointer; position: relative; z-index: 110;
}
.nav-toggle span {
  position: absolute; left: 12px; right: 12px; height: 2px; border-radius: 2px;
  background: #fff; transition: transform .3s ease, opacity .3s ease, top .3s ease;
}
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 27px; }
body.menu-open .nav-toggle span:nth-child(1) { top: 21px; transform: rotate(45deg); }
body.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.menu-open .nav-toggle span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

/* =========================================================
   HERO (HOME)
   ========================================================= */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden; isolation: isolate;
}
.hero-bg { position: absolute; inset: 0; z-index: -3; overflow: hidden; background: var(--ink); }
.hero-video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover; object-position: center;
}
.hero-overlay {
  position: absolute; inset: 0; z-index: -2;
  background:
    linear-gradient(100deg, rgba(4, 7, 15, .92) 0%, rgba(4, 8, 18, .55) 38%, rgba(4, 9, 20, 0) 60%),
    linear-gradient(180deg, rgba(4, 7, 15, 0) 55%, var(--ink) 99%);
}
.hero-glow {
  position: absolute; z-index: -1; width: 640px; height: 640px; border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 124, 246, .28) 0%, transparent 65%);
  filter: blur(30px);
  top: -180px; right: -120px;
  pointer-events: none;
}

.hero-content { max-width: 760px; padding: 130px 0 110px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 18px; border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(61, 139, 255, .08);
  font-size: 12.5px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--blue-bright); margin-bottom: 28px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--blue-bright); box-shadow: 0 0 12px var(--blue-bright); animation: pulse 2.2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 800; line-height: 1.06; letter-spacing: -.03em;
  margin-bottom: 24px;
}
.hero-sub {
  font-size: clamp(17px, 1.6vw, 20px); color: var(--text-soft);
  max-width: 580px; margin-bottom: 40px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }

.hero-scroll {
  position: absolute; right: 40px; bottom: 44px; z-index: 2;
  display: flex; align-items: center; gap: 10px;
  font-size: 11px; letter-spacing: .24em; text-transform: uppercase; color: var(--muted);
  writing-mode: vertical-rl;
}
.hero-scroll::after {
  content: ""; width: 1px; height: 46px;
  background: linear-gradient(var(--blue-bright), transparent);
  animation: scrollline 2s ease infinite;
}
@keyframes scrollline { 0% { transform: scaleY(0); transform-origin: top; } 55% { transform: scaleY(1); transform-origin: top; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* =========================================================
   STATS STRIP
   ========================================================= */
.stats-band {
  position: relative; margin-top: -66px; z-index: 5;
}
.stats-inner {
  background: linear-gradient(135deg, rgba(14, 24, 48, .9), rgba(9, 15, 30, .92));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  display: grid; grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
}
.stat {
  padding: 38px 32px;
  display: flex; flex-direction: column; gap: 6px;
  position: relative;
}
.stat + .stat::before {
  content: ""; position: absolute; left: 0; top: 22%; bottom: 22%;
  width: 1px; background: var(--line);
}
.stat-num {
  font-family: var(--font-head);
  font-size: clamp(32px, 3.2vw, 44px); font-weight: 800; letter-spacing: -.02em;
  color: #fff;
}
.stat-num em { font-style: normal; background: var(--grad-blue); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { font-size: 13.5px; color: var(--muted); letter-spacing: .04em; }

/* =========================================================
   PAGE HERO (inner pages)
   ========================================================= */
.page-hero {
  position: relative; padding: 190px 0 90px; overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(700px 360px at 78% -10%, rgba(47,124,246,.22), transparent 70%),
    radial-gradient(500px 300px at 8% 110%, rgba(31,95,224,.14), transparent 70%);
}
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(110, 168, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110, 168, 255, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, #000, transparent);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent);
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); margin-bottom: 20px; }
.breadcrumb a:hover { color: var(--blue-bright); }
.breadcrumb span { opacity: .5; }
.page-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(36px, 5vw, 58px); font-weight: 800; letter-spacing: -.03em; line-height: 1.1;
  margin-bottom: 18px;
}
.page-hero p { font-size: 18px; color: var(--text-soft); max-width: 620px; }

/* =========================================================
   ABOUT / INTRO
   ========================================================= */
.about-grid { display: grid; grid-template-columns: 1.02fr 1fr; gap: 72px; align-items: center; }
.about-media { position: relative; }
.about-media img {
  width: 100%; border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.about-media::before {
  content: ""; position: absolute; inset: -22px -22px auto auto; width: 70%; height: 70%;
  border: 1px solid rgba(61,139,255,.35); border-radius: var(--radius);
  border-left: 0; border-bottom: 0; z-index: -1;
}
.about-media .floating-card {
  position: absolute; left: -30px; bottom: 38px;
  background: rgba(9, 16, 32, .9); backdrop-filter: blur(14px);
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  padding: 20px 24px; display: flex; align-items: center; gap: 16px;
  box-shadow: var(--shadow);
}
.about-media .floating-card .ico {
  width: 46px; height: 46px; border-radius: 12px; background: rgba(61,139,255,.14);
  display: grid; place-items: center; color: var(--blue-bright); flex-shrink: 0;
}
.about-media .floating-card .ico svg { width: 23px; height: 23px; }
.about-media .floating-card strong { display: block; font-family: var(--font-head); font-size: 15px; }
.about-media .floating-card span { font-size: 12.5px; color: var(--muted); }

.about-copy h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 3vw, 38px); font-weight: 800; letter-spacing: -.02em;
  line-height: 1.2; margin: 18px 0 22px;
}
.about-copy p { color: var(--text-soft); margin-bottom: 18px; }
.about-copy p strong { color: var(--text); font-weight: 700; }

.about-cats { margin-top: 76px; }
.about-cats .cat-lead {
  margin: 0 0 26px; padding-left: 16px;
  border-left: 3px solid var(--blue);
}
.about-cats .cat-lead strong {
  font-family: var(--font-head);
  font-size: 19px; font-weight: 700; letter-spacing: .01em;
  color: var(--text);
}
.cat-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cat-item {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 20px 22px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,.025); border: 1px solid var(--line);
  transition: border-color .3s, background .3s, transform .3s;
}
.cat-item:hover { border-color: var(--line-strong); background: rgba(61,139,255,.07); transform: translateY(-2px); }
.cat-item .tick {
  width: 20px; height: 20px; flex-shrink: 0; margin-top: 3px;
  border-radius: 50%; background: rgba(61,139,255,.15);
  display: grid; place-items: center;
}
.cat-item .tick svg { width: 11px; height: 11px; color: var(--blue-bright); }
.cat-item strong { display: block; font-size: 14.5px; font-weight: 700; margin-bottom: 2px; }
.cat-item span { font-size: 12.5px; color: var(--muted); line-height: 1.55; }

/* =========================================================
   ADVANTAGES
   ========================================================= */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.adv-card {
  position: relative;
  padding: 36px 30px 34px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(16, 26, 48, .65), rgba(9, 15, 30, .85));
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease;
}
.adv-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: var(--grad-blue);
  transform: scaleX(0); transform-origin: left; transition: transform .4s ease;
}
.adv-card:hover { transform: translateY(-6px); border-color: var(--line-strong); box-shadow: var(--shadow); }
.adv-card:hover::before { transform: scaleX(1); }
.adv-ico {
  width: 54px; height: 54px; border-radius: 15px;
  background: rgba(61,139,255,.1); border: 1px solid rgba(61,139,255,.22);
  display: grid; place-items: center; margin-bottom: 24px;
  color: var(--blue-bright);
  transition: background .35s, box-shadow .35s;
}
.adv-card:hover .adv-ico { background: var(--grad-blue); color: #fff; box-shadow: 0 10px 26px -8px rgba(47,124,246,.8); }
.adv-ico svg { width: 25px; height: 25px; }
.adv-card .num {
  position: absolute; top: 24px; right: 26px;
  font-family: var(--font-head); font-size: 15px; font-weight: 800;
  color: rgba(255,255,255,.12); letter-spacing: .05em;
}
.adv-card h3 { font-family: var(--font-head); font-size: 18.5px; font-weight: 700; margin-bottom: 12px; letter-spacing: -.01em; }
.adv-card p { font-size: 14px; color: var(--text-soft); line-height: 1.7; }

/* =========================================================
   ADVANTAGE DETAIL ROWS
   ========================================================= */
.feature-list { display: flex; flex-direction: column; gap: 22px; }
.feature-row {
  position: relative;
  display: grid; grid-template-columns: 90px 64px 1fr; gap: 28px; align-items: center;
  padding: 38px 42px;
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(15, 25, 48, .75), rgba(8, 14, 28, .9));
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color .35s ease, transform .35s ease, box-shadow .35s ease;
}
.feature-row:hover { border-color: var(--line-strong); transform: translateX(6px); box-shadow: var(--shadow); }
.feature-row::after {
  content: ""; position: absolute; right: -60px; top: -60px;
  width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle, rgba(61,139,255,.14), transparent 70%);
  opacity: 0; transition: opacity .4s;
}
.feature-row:hover::after { opacity: 1; }
.feature-num {
  font-family: var(--font-head); font-size: 44px; font-weight: 800;
  line-height: 1; letter-spacing: -.02em;
  background: linear-gradient(180deg, rgba(122,176,255,.5), rgba(61,139,255,.08));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.feature-ico {
  width: 64px; height: 64px; border-radius: 18px;
  background: rgba(61,139,255,.1); border: 1px solid rgba(61,139,255,.22);
  display: grid; place-items: center; color: var(--blue-bright);
  transition: background .35s, box-shadow .35s, color .35s;
}
.feature-row:hover .feature-ico { background: var(--grad-blue); color: #fff; box-shadow: 0 12px 30px -10px rgba(47,124,246,.8); }
.feature-ico svg { width: 29px; height: 29px; }
.feature-text h3 { font-family: var(--font-head); font-size: 22px; font-weight: 700; margin-bottom: 8px; letter-spacing: -.01em; }
.feature-text p { color: var(--text-soft); font-size: 15.5px; max-width: 640px; }

.process-strip { margin-top: 26px; display: flex; justify-content: center; }
.process-pill {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 16px 30px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: rgba(61,139,255,.06);
  font-size: 14px; color: var(--text-soft);
}
.process-pill strong { color: #fff; font-weight: 700; }
.process-pill .sep { width: 5px; height: 5px; border-radius: 50%; background: var(--blue-bright); }

/* =========================================================
   PRODUCTS
   ========================================================= */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 50px; }
.filter-btn {
  padding: 10px 22px; border-radius: 999px;
  background: rgba(255,255,255,.03); border: 1px solid var(--line);
  color: var(--text-soft); font-size: 13.5px; font-weight: 600; cursor: pointer;
  transition: all .3s ease;
}
.filter-btn:hover { color: #fff; border-color: var(--line-strong); }
.filter-btn.active { background: var(--grad-blue); border-color: transparent; color: #fff; box-shadow: 0 10px 26px -10px rgba(47,124,246,.8); }

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card {
  border-radius: var(--radius); overflow: hidden;
  background: var(--panel); border: 1px solid var(--line);
  transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease;
}
.product-card:hover { transform: translateY(-6px); border-color: var(--line-strong); box-shadow: var(--shadow); }
.product-thumb { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #0a1120; }
.product-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .7s cubic-bezier(.2,.6,.2,1);
}
.product-card:hover .product-thumb img { transform: scale(1.08); }
.product-thumb::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(7,12,24,.55));
}
.product-tag {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  padding: 5px 13px; border-radius: 999px;
  font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  background: rgba(5,10,20,.72); border: 1px solid var(--line-strong);
  color: var(--blue-bright); backdrop-filter: blur(6px);
}
.product-info { padding: 20px 22px 24px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.product-info h3 { font-family: var(--font-head); font-size: 16.5px; font-weight: 700; }
.product-info .arrow {
  width: 36px; height: 36px; border-radius: 50%; flex-shrink: 0;
  border: 1px solid var(--line); display: grid; place-items: center;
  color: var(--muted); transition: all .3s;
}
.product-info .arrow svg { width: 15px; height: 15px; }
.product-card:hover .arrow { background: var(--grad-blue); border-color: transparent; color: #fff; }
.product-card.hide { display: none; }

/* =========================================================
   CASES
   ========================================================= */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.case-card {
  border-radius: var(--radius); overflow: hidden; position: relative;
  min-height: 420px; display: flex; align-items: flex-end;
  border: 1px solid var(--line);
  background: var(--panel);
}
.case-card img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transition: transform .8s cubic-bezier(.2,.6,.2,1);
}
.case-card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(185deg, rgba(6,10,20,.08) 30%, rgba(5,8,16,.55) 60%, rgba(4,7,15,.96) 100%);
  transition: background .4s;
}
.case-card:hover img { transform: scale(1.07); }
.case-card:hover::after { background: linear-gradient(185deg, rgba(10,20,45,.18) 20%, rgba(7,14,32,.62) 55%, rgba(4,8,18,.97) 100%); }
.case-body { position: relative; z-index: 2; padding: 28px; width: 100%; }
.case-loc {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 11.5px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--blue-bright); margin-bottom: 12px;
}
.case-loc svg { width: 13px; height: 13px; }
.case-body h3 { font-family: var(--font-head); font-size: 19px; font-weight: 700; margin-bottom: 10px; line-height: 1.3; }
.case-body p { font-size: 13.5px; color: var(--text-soft); line-height: 1.7; }

/* =========================================================
   CTA BAND
   ========================================================= */
.cta-band { padding: 0 0 120px; }
.cta-inner {
  position: relative; overflow: hidden;
  border-radius: 24px;
  padding: 80px 64px;
  background:
    radial-gradient(700px 300px at 85% 0%, rgba(61,139,255,.35), transparent 70%),
    linear-gradient(120deg, #0c1a36 0%, #0a1428 55%, #0b1f44 100%);
  border: 1px solid var(--line-strong);
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
}
.cta-inner::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(140,180,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140,180,255,.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at left, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at left, #000, transparent 75%);
}
.cta-inner h2 {
  position: relative;
  font-family: var(--font-head); font-size: clamp(26px, 3vw, 38px); font-weight: 800;
  letter-spacing: -.02em; line-height: 1.2; margin-bottom: 12px;
}
.cta-inner p { position: relative; color: var(--text-soft); max-width: 520px; }
.cta-actions { position: relative; display: flex; gap: 14px; flex-shrink: 0; }

/* =========================================================
   CONTACT
   ========================================================= */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 60px; align-items: start; }
.contact-info h2 {
  font-family: var(--font-head); font-size: clamp(28px, 3vw, 38px); font-weight: 800;
  letter-spacing: -.02em; margin: 16px 0 18px;
}
.contact-info > p { color: var(--text-soft); margin-bottom: 36px; }
.contact-list { display: flex; flex-direction: column; gap: 14px; margin-bottom: 40px; }
.contact-row {
  display: flex; gap: 18px; align-items: flex-start;
  padding: 22px 24px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,.025); border: 1px solid var(--line);
  transition: border-color .3s, background .3s;
}
.contact-row:hover { border-color: var(--line-strong); background: rgba(61,139,255,.06); }
.contact-row .ico {
  width: 44px; height: 44px; flex-shrink: 0; border-radius: 12px;
  background: rgba(61,139,255,.12); display: grid; place-items: center; color: var(--blue-bright);
}
.contact-row .ico svg { width: 20px; height: 20px; }
.contact-row span { display: block; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 3px; }
.contact-row strong { font-size: 15.5px; font-weight: 600; word-break: break-word; }

.contact-form {
  background: linear-gradient(180deg, rgba(14,24,48,.7), rgba(8,14,28,.85));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 44px; box-shadow: var(--shadow);
}
.contact-form h3 { font-family: var(--font-head); font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.contact-form > p { color: var(--muted); font-size: 14px; margin-bottom: 30px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--text-soft); margin-bottom: 9px; }
.field input, .field textarea {
  width: 100%; padding: 14px 18px;
  background: rgba(4, 8, 17, .6);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  color: var(--text); outline: none;
  transition: border-color .25s, box-shadow .25s, background .25s;
}
.field textarea { resize: vertical; min-height: 130px; }
.field input::placeholder, .field textarea::placeholder { color: #5b6a85; }
.field input:focus, .field textarea:focus {
  border-color: var(--blue); background: rgba(8, 15, 31, .9);
  box-shadow: 0 0 0 4px rgba(61,139,255,.12);
}
.field input.invalid, .field textarea.invalid { border-color: #ff6b81; box-shadow: 0 0 0 4px rgba(255,107,129,.1); }
.form-msg { margin-top: 14px; font-size: 13.5px; font-weight: 600; display: none; }
.form-msg.ok { display: block; color: #57d9a3; }
.form-msg.err { display: block; color: #ff8ba0; }
.contact-form .btn { width: 100%; margin-top: 6px; }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink) 0%, #03060c 100%);
  padding-top: 80px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1.2fr; gap: 60px;
  padding-bottom: 56px;
}
.footer-brand .logo { margin-bottom: 20px; }
.footer-brand p { color: var(--muted); font-size: 14px; max-width: 340px; margin-bottom: 24px; }
.footer-title {
  font-family: var(--font-head); font-size: 13.5px; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase; color: var(--text);
  margin-bottom: 22px;
}
.footer-nav ul { display: flex; flex-direction: column; gap: 12px; }
.footer-nav a { color: var(--muted); font-size: 14px; transition: color .25s, padding .25s; }
.footer-nav a:hover { color: var(--blue-bright); padding-left: 5px; }
.footer-contact li { display: flex; gap: 12px; color: var(--muted); font-size: 13.5px; margin-bottom: 16px; line-height: 1.6; }
.footer-contact svg { width: 17px; height: 17px; color: var(--blue-bright); flex-shrink: 0; margin-top: 3px; }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 26px 0; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  font-size: 13px; color: var(--muted);
}

/* Back to top */
.back-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 90;
  width: 48px; height: 48px; border-radius: 14px;
  background: var(--grad-blue); border: 0; cursor: pointer;
  display: grid; place-items: center; color: #fff;
  box-shadow: 0 14px 34px -10px rgba(47,124,246,.8);
  opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: opacity .3s, transform .3s, visibility .3s;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top svg { width: 19px; height: 19px; }

/* =========================================================
   REVEAL ANIMATIONS
   ========================================================= */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s cubic-bezier(.2,.6,.2,1), transform .8s cubic-bezier(.2,.6,.2,1); }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .08s; }
.reveal-delay-2 { transition-delay: .16s; }
.reveal-delay-3 { transition-delay: .24s; }
.reveal-delay-4 { transition-delay: .32s; }

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

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1280px) {
  .header-contact { display: none; }
}

@media (max-width: 1080px) {
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before { display: none; }
  .stat { padding: 30px 28px; }

  body.menu-open { overflow: hidden; }
  body.menu-open::after {
    content: ""; position: fixed; inset: 0; z-index: 99;
    background: rgba(4, 7, 15, .97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }
  .main-nav {
    position: fixed; inset: 0; z-index: 105;
    background: transparent;
    opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s;
  }
  body.menu-open .main-nav { opacity: 1; visibility: visible; }
  .main-nav ul {
    position: absolute; top: 104px; left: 0; right: 0;
    flex-direction: column; gap: 4px; text-align: center;
  }
  .main-nav a { font-size: 22px; font-family: var(--font-head); font-weight: 700; padding: 12px 24px; }
  .main-nav a.active::after { display: none; }
  .nav-toggle { display: block; }
}

@media (max-width: 900px) {
  .section { padding: 90px 0; }
  .about-grid { grid-template-columns: 1fr; gap: 60px; }
  .about-cats { margin-top: 56px; }
  .cat-list { grid-template-columns: 1fr 1fr; }
  .about-media .floating-card { left: 12px; }
  .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .cta-inner { flex-direction: column; align-items: flex-start; padding: 56px 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 44px; }
  .footer-brand { grid-column: 1 / -1; }
  .hero-scroll { display: none; }
}

@media (max-width: 640px) {
  .container, .header-inner { width: calc(100% - 36px); }
  .section { padding: 72px 0; }
  .adv-grid, .product-grid, .case-grid, .stats-inner, .cat-list, .form-row { grid-template-columns: 1fr; }
  .product-grid { gap: 18px; }
  .stat + .stat::before { display: none; }
  .stat { border-bottom: 1px solid var(--line); }
  .stat:last-child { border-bottom: 0; }
  .cta-band { padding-bottom: 72px; }
  .cta-inner { padding: 44px 28px; }
  .cta-actions { flex-direction: column; width: 100%; }
  .cta-actions .btn { width: 100%; }
  .contact-form { padding: 30px 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero-content { padding: 120px 0 90px; }
  .page-hero { padding: 150px 0 64px; }
  .header-cta .btn { display: none; }
  .feature-row { grid-template-columns: 56px 1fr; gap: 16px; padding: 28px 24px; }
  .feature-num { grid-row: 1 / 3; font-size: 34px; }
  .feature-ico { width: 52px; height: 52px; border-radius: 14px; }
  .feature-text { grid-column: 2; }
  .process-pill { flex-wrap: wrap; justify-content: center; border-radius: 18px; }
}

/* =========================================================
   SINGLE-PAGE ADD-ONS
   progress bar · lang switch · scrollspy offsets · tilt · zh
   ========================================================= */
section[id] { scroll-margin-top: 92px; }

.section-alt {
  background: linear-gradient(180deg, transparent, rgba(11, 20, 40, .45) 22%, rgba(11, 20, 40, .45) 78%, transparent);
}

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0;
  height: 3px; z-index: 200;
  background: linear-gradient(90deg, #1f5fe0, #3d8bff, #6ea8ff);
  box-shadow: 0 0 14px rgba(61, 139, 255, .65);
  transform: scaleX(0); transform-origin: left;
  pointer-events: none;
}

/* ---------- Language switcher (sliding pill) ---------- */
.lang-switch {
  position: relative;
  display: inline-flex; align-items: center;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .04);
}
.lang-thumb {
  position: absolute; top: 4px; left: 4px;
  width: calc(50% - 4px); height: calc(100% - 8px);
  border-radius: 999px;
  background: var(--grad-blue);
  box-shadow: 0 6px 16px -6px rgba(47, 124, 246, .85);
  transition: transform .38s cubic-bezier(.55, 0, .2, 1);
}
.lang-switch[data-lang="zh"] .lang-thumb { transform: translateX(100%); }
.lang-btn {
  position: relative; z-index: 1;
  flex: 1 1 0; min-width: 38px;
  padding: 6px 12px;
  border: 0; background: transparent; cursor: pointer;
  border-radius: 999px;
  font-size: 12.5px; font-weight: 700;
  color: var(--muted);
  transition: color .3s ease;
}
.lang-btn.active { color: #fff; }

/* ---------- Tilt cards / magnetic ---------- */
[data-tilt] {
  transform-style: preserve-3d;
  transition: transform .35s cubic-bezier(.22, .61, .36, 1), box-shadow .35s ease, border-color .35s ease;
  will-change: transform;
}
.magnetic { transition: transform .25s cubic-bezier(.22, .61, .36, 1), box-shadow .3s ease; will-change: transform; }

/* ---------- Contact h3 (single page) ---------- */
.contact-info .contact-h3 {
  font-family: var(--font-head);
  font-size: 30px; font-weight: 800; letter-spacing: -.02em;
  margin-bottom: 14px;
}

/* ---------- Footer contact labels ---------- */
.footer-contact em { font-style: normal; color: var(--blue-bright); font-weight: 600; }

/* ---------- New logo (cropped from horizontal lockup) ---------- */
.logo-icon {
  width: 40px; height: 40px; flex: 0 0 auto;
  border-radius: 50%; overflow: hidden;
  background: #fff;
  display: flex; align-items: center; justify-content: flex-start;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .25), 0 8px 22px -8px rgba(47, 124, 246, .8);
}
.logo-icon img {
  height: 100%; width: auto; max-width: none; display: block;
  flex: 0 0 auto;
  transform: translateX(-6.4px);
  filter: none; opacity: 1;
}

/* ---------- Language switch flash ---------- */
@keyframes langIn {
  from { opacity: .25; transform: translateY(3px); filter: blur(2px); }
  to   { opacity: 1; transform: translateY(0); filter: blur(0); }
}
body.lang-flash [data-i18n],
body.lang-flash [data-i18n-html] { animation: langIn .45s ease both; }

/* ---------- 简体中文排版 ---------- */
body[data-lang="zh"] {
  --font-head: "Noto Sans SC", "Manrope", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.85;
}
body[data-lang="zh"] h1,
body[data-lang="zh"] h2,
body[data-lang="zh"] h3,
body[data-lang="zh"] h4,
body[data-lang="zh"] .btn,
body[data-lang="zh"] .main-nav a,
body[data-lang="zh"] .hero-badge,
body[data-lang="zh"] .product-tag { letter-spacing: 0; }
body[data-lang="zh"] .eyebrow {
  text-transform: none;
  letter-spacing: .14em;
  font-size: 13px;
  font-weight: 600;
}
body[data-lang="zh"] .section-head h2 { line-height: 1.3; }
body[data-lang="zh"] .hero-content h1 { line-height: 1.22; }
body[data-lang="zh"] .adv-card h3,
body[data-lang="zh"] .product-info h3 { font-weight: 700; }
body[data-lang="zh"] .lang-btn:not(.active) { font-family: "Inter", sans-serif; }

@media (max-width: 640px) {
  .lang-switch { padding: 3px; }
  .lang-btn { padding: 5px 10px; min-width: 34px; }
  .lang-thumb { width: calc(50% - 3px); left: 3px; top: 3px; height: calc(100% - 6px); }
}