/* ============================================================
   首智广告 · GLASSMORPHISM
   gradient canvas / frosted panels / white type
   ============================================================ */

:root {
  --gradient-bg: linear-gradient(135deg, #0f0c29 0%, #302b63 52%, #24243e 100%);

  --glass-bg: rgba(255, 255, 255, 0.12);
  --glass-bg-strong: rgba(255, 255, 255, 0.18);
  --glass-border: rgba(255, 255, 255, 0.25);
  --glass-blur: blur(20px);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);

  --text: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.72);
  --text-subtle: rgba(255, 255, 255, 0.5);

  --radius: 20px;
  --max: 1120px;

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
    "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--gradient-bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
}

body::before {
  width: 620px;
  height: 620px;
  top: -180px;
  left: -140px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.32), transparent 65%);
}

body::after {
  width: 680px;
  height: 680px;
  bottom: -240px;
  right: -160px;
  background: radial-gradient(circle, rgba(255, 110, 199, 0.26), transparent 65%);
}

img { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

::selection { background: rgba(255, 255, 255, 0.28); }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 1;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 16px;
  top: 10px;
  z-index: 200;
  background: rgba(255, 255, 255, 0.9);
  color: #17153a;
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 13px;
}

/* ---------- glass primitives ---------- */

.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius);
}

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.08);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 30px;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand img { width: 22px; height: auto; }

.brand .sub {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-subtle);
  margin-left: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  color: var(--text-muted);
}

.nav-links a { transition: color 160ms ease; }
.nav-links a:hover { color: var(--text); }

.nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang {
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease;
}
.lang:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.28);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.22);
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
  white-space: nowrap;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.42);
}

.btn.solid {
  background: rgba(255, 255, 255, 0.9);
  color: #1a1733;
  border-color: rgba(255, 255, 255, 0.9);
}
.btn.solid:hover { background: #ffffff; }

.btn.small { height: 34px; padding: 0 16px; font-size: 13px; }

:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.35);
}

/* ---------- hero ---------- */

.hero {
  padding: 104px 0 88px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 30px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 26px;
}

h1 {
  font-size: clamp(40px, 5.4vw, 68px);
  line-height: 1.14;
  letter-spacing: -0.03em;
  font-weight: 700;
  margin: 0 auto 22px;
  max-width: 18em;
  text-shadow: 0 0 40px rgba(255, 255, 255, 0.16);
}

h1 .thin {
  font-weight: 300;
  color: rgba(255, 255, 255, 0.82);
}

.lede {
  font-size: 17px;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 46ch;
  margin: 0 auto 34px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-visual {
  margin: 64px auto 0;
  max-width: 940px;
  padding: 10px;
  border-radius: 26px;
}

.hero-visual img {
  width: 100%;
  height: auto;
  border-radius: 18px;
  display: block;
}

/* ---------- stats ---------- */

.stats {
  padding: 0 0 88px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.stat {
  padding: 22px 24px;
  border-radius: 18px;
  text-align: left;
}

.stat .value {
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.stat .value span {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-subtle);
  margin-left: 2px;
}

.stat .label {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ---------- sections ---------- */

.section { padding: 88px 0; }

.section-head { max-width: 720px; margin: 0 0 40px; }

.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-subtle);
  margin: 0 0 14px;
}

h2 {
  font-size: clamp(30px, 3.6vw, 46px);
  line-height: 1.2;
  letter-spacing: -0.025em;
  font-weight: 600;
  margin: 0 0 14px;
  text-shadow: 0 0 30px rgba(255, 255, 255, 0.1);
}

.section-head p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-muted);
  margin: 0;
  max-width: 52ch;
}

.section-head.center p { margin-left: auto; margin-right: auto; }

/* cards */

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.card {
  padding: 28px;
  border-radius: var(--radius);
  transition: background 200ms ease, border-color 200ms ease;
}

.card:hover {
  background: var(--glass-bg-strong);
  border-color: rgba(255, 255, 255, 0.34);
}

.card .idx {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-subtle);
  display: block;
  margin-bottom: 18px;
}

.card h3 {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
}

.card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-muted);
  margin: 0;
}

/* split */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.split-media { padding: 8px; border-radius: 24px; }

.split-media img {
  width: 100%;
  height: auto;
  border-radius: 18px;
}

.split-body p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0 0 14px;
}

.split > * { min-width: 0; }

.split h2 { font-size: clamp(24px, 2.8vw, 34px); }

.split-body p:last-child { margin-bottom: 0; }

.dl {
  margin: 22px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.dl > div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 13px;
}

.dl dt { color: var(--text-subtle); }
.dl dd { margin: 0; color: var(--text); text-align: right; }

/* film */

.film {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.film-media {
  display: block;
  position: relative;
  padding: 8px;
  border-radius: 24px;
}

.film-media img {
  width: 100%;
  height: auto;
  border-radius: 18px;
}

.film-media .play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.film-media .play i {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.45);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  display: grid;
  place-items: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
}

.film-media .play svg { margin-left: 3px; }

.film-caption {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-subtle);
}

/* cases */

.cases {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.case {
  margin: 0;
  padding: 8px 8px 0;
  border-radius: 24px;
  overflow: hidden;
}

.case img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 16px;
}

.case figcaption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 8px 16px;
  font-size: 13px;
}

.case .name { color: var(--text); }
.case .meta {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-subtle);
}

/* certs */

.certs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.cert {
  padding: 24px;
  border-radius: 18px;
  text-align: center;
}

.cert h3 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 8px;
}

.cert p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0;
}

/* contact */

.contact-panel {
  padding: 56px 48px;
  border-radius: 26px;
  text-align: center;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 40px;
  margin: 36px 0 0;
  text-align: left;
}

.contact-grid > div { border-top: 1px solid rgba(255, 255, 255, 0.16); padding-top: 12px; }

.contact-grid dt {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-subtle);
  margin-bottom: 4px;
}

.contact-grid dd {
  margin: 0;
  font-size: 14px;
  color: var(--text);
}

.contact-grid dd a { border-bottom: 1px solid rgba(255, 255, 255, 0.3); }
.contact-grid dd a:hover { border-color: #fff; }

.contact-actions { margin-top: 34px; }

/* footer */

footer {
  padding: 32px 0 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-subtle);
}

.footer-inner img { width: 20px; }

.footer-links { margin-left: auto; display: flex; gap: 18px; }
.footer-links a:hover { color: var(--text); }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero { padding: 64px 0 56px; }
  .nav-links { display: none; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .cards { grid-template-columns: 1fr; }
  .split, .film { grid-template-columns: 1fr; gap: 28px; }
  .certs { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 64px 0; }
}

@media (max-width: 620px) {
  .wrap { padding: 0 20px; }
  h1 { font-size: 40px; }
  .cases { grid-template-columns: 1fr; }
  .case img { height: 230px; }
  .certs { grid-template-columns: 1fr; }
  .contact-panel { padding: 36px 22px; }
  .contact-grid { grid-template-columns: 1fr; gap: 16px; }
  .footer-links { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}