/* Self-hosted SIL OFL fonts. Do not restore Google Fonts URLs. */
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../assets/fonts/noto-sans-sc-latin-400-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../assets/fonts/noto-sans-sc-chinese-simplified-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../assets/fonts/noto-sans-sc-latin-500-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../assets/fonts/noto-sans-sc-chinese-simplified-500-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../assets/fonts/noto-sans-sc-latin-600-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../assets/fonts/noto-sans-sc-chinese-simplified-600-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../assets/fonts/noto-sans-sc-latin-700-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Noto Sans SC";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../assets/fonts/noto-sans-sc-chinese-simplified-700-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Outfit";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../assets/fonts/outfit-latin-500-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Outfit";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../assets/fonts/outfit-latin-700-normal.woff2") format("woff2");
}

:root {
  --navy-950: #050914;
  --navy-900: #07111f;
  --navy-800: #0b1a33;
  --navy-700: #102445;
  --blue-500: #1b7cff;
  --blue-400: #3d93ff;
  --cyan-400: #3ec8ff;
  --cyan-300: #7ad8ff;
  --text: #eaf1fb;
  --text-2: #c3d2e8;
  --muted: #8aa0bd;
  --ink: #122033;
  --ink-2: #4a5d75;
  --paper: #f5f8fc;
  --white: #ffffff;
  --line: rgba(62, 200, 255, 0.18);
  --line-dark: rgba(16, 36, 69, 0.12);
  --shadow: 0 24px 60px rgba(7, 17, 31, 0.18);
  --radius: 22px;
  --header-h: 76px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Outfit", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; }

.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(5, 9, 20, 0.72);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  width: min(1180px, calc(100% - 40px)); margin: 0 auto;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo img { width: 115px; height: auto; max-width: none; }
.nav { display: flex; align-items: center; gap: 34px; }
.nav > a {
  color: rgba(234,241,251,0.82);
  font-size: 15px;
  letter-spacing: 0.04em;
  position: relative;
  padding: 8px 0;
}
.nav > a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: linear-gradient(90deg, var(--cyan-400), var(--blue-500));
  transition: width .25s ease;
}
.nav > a:hover, .nav > a.active { color: #fff; }
.nav > a:hover::after, .nav > a.active::after { width: 100%; }
.lang {
  display: inline-flex; align-items: center; gap: 6px;
  color: rgba(234,241,251,0.55); font-size: 13px; letter-spacing: .08em;
}
.lang b { color: #fff; font-weight: 500; }
.lang a {
  color: rgba(234,241,251,0.55);
  font-size: 13px;
  letter-spacing: .08em;
  padding: 0;
}
.lang a:hover { color: #fff; }
.menu-btn {
  display: none; width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.16);
  background: transparent; border-radius: 10px; position: relative;
}
.menu-btn span, .menu-btn span::before, .menu-btn span::after {
  position: absolute; left: 11px; width: 18px; height: 1.5px; background: #fff; content: "";
}
.menu-btn span { top: 20px; }
.menu-btn span::before { top: -6px; }
.menu-btn span::after { top: 6px; }

.hero {
  position: relative;
  min-height: 92vh;
  padding: calc(var(--header-h) + 72px) 0 90px;
  background:
    radial-gradient(1200px 500px at 80% 10%, rgba(27,124,255,.28), transparent 55%),
    radial-gradient(900px 420px at 10% 80%, rgba(62,200,255,.16), transparent 50%),
    linear-gradient(180deg, rgba(5,9,20,.55), rgba(5,9,20,.78)),
    url("../assets/home_banner.jpg") center/cover no-repeat;
  color: var(--text);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(62,200,255,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(62,200,255,.07) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 70% 40%, #000 20%, transparent 72%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 820px; }
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 14px; border-radius: 999px;
  border: 1px solid rgba(62,200,255,.35);
  background: rgba(27,124,255,.12);
  color: var(--cyan-300); font-size: 13px; letter-spacing: .18em;
  text-transform: uppercase;
}
.kicker i { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan-400); box-shadow: 0 0 10px var(--cyan-400); }
.hero h1 {
  font-family: var(--display);
  font-size: clamp(36px, 5.4vw, 68px);
  line-height: 1.12;
  font-weight: 650;
  margin: 22px 0 18px;
  letter-spacing: .02em;
}
.hero h1 span {
  display: block;
  background: linear-gradient(90deg, #fff 0%, #9ed8ff 55%, #3ec8ff 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { max-width: 640px; color: var(--text-2); font-size: 17px; }
.hero-actions { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 22px; border-radius: 12px;
  font-size: 15px; font-weight: 500; border: 1px solid transparent; transition: .2s ease;
}
.btn-primary {
  background: linear-gradient(90deg, #1b7cff, #3ec8ff);
  color: #041018; box-shadow: 0 10px 30px rgba(27,124,255,.35);
}
.btn-primary:hover { transform: translateY(-1px); filter: brightness(1.05); }
.btn-ghost {
  border-color: rgba(255,255,255,.22); color: #fff; background: rgba(255,255,255,.04);
}
.btn-ghost:hover { border-color: var(--cyan-400); background: rgba(62,200,255,.08); }
.btn-dark {
  background: var(--navy-800); color: #fff;
}
.btn-dark:hover { background: var(--navy-700); }

.metrics {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  margin-top: 64px; position: relative; z-index: 1;
}
.metric {
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: rgba(7,17,31,.45);
  backdrop-filter: blur(10px);
  border-radius: 16px;
}
.metric b {
  display: block; font-family: var(--display); font-size: 28px; color: #fff; font-weight: 650;
}
.metric span { color: var(--muted); font-size: 13px; }

.section { padding: 92px 0; }
.section-flush { padding-top: 0; }
.section-dark { background: var(--navy-900); color: var(--text); }
.section-navy {
  background:
    linear-gradient(180deg, rgba(7,17,31,.86), rgba(7,17,31,.9)),
    url("../assets/home_feature_bg.jpg") center/cover no-repeat;
  color: var(--text);
}
.section-head { margin-bottom: 42px; }
.eyebrow {
  color: var(--blue-500); font-size: 13px; letter-spacing: .22em; text-transform: uppercase; font-weight: 600;
}
.section-dark .eyebrow, .section-navy .eyebrow { color: var(--cyan-400); }
.section-head h2 {
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.25; margin: 8px 0 14px; font-weight: 650;
}
.section-head p { color: var(--ink-2); max-width: 720px; }
.section-dark .section-head p, .section-navy .section-head p { color: var(--text-2); }

.about-grid {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center;
}
.about-copy p { color: var(--ink-2); font-size: 16px; }
.chip-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.chip {
  padding: 6px 12px; border-radius: 999px; font-size: 13px;
  background: #eaf3ff; color: #1657b8; border: 1px solid #d4e6ff;
}
.panel {
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 340px;
  background: #07111f;
  box-shadow: var(--shadow);
  position: relative;
}
.panel img {
  width: 100%;
  height: 100%;
  min-height: 340px;
  object-fit: cover;
  display: block;
}
.panel::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(7,17,31,.1), rgba(7,17,31,.55));
  pointer-events: none;
}
.panel-caption {
  position: absolute; left: 22px; bottom: 22px; z-index: 1;
  color: #fff; letter-spacing: .12em; font-size: 12px;
  pointer-events: none;
}

.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  border-radius: 20px; padding: 28px 26px 30px;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--line);
  position: relative; overflow: hidden;
  min-height: 230px;
}
.card::before {
  content: ""; position: absolute; inset: auto -20% -40% auto; width: 180px; height: 180px;
  background: radial-gradient(circle, rgba(62,200,255,.22), transparent 70%);
}
.card .idx {
  font-family: var(--display); color: var(--cyan-300); font-size: 13px; letter-spacing: .16em;
}
.card h3 { font-size: 22px; margin: 14px 0 12px; font-weight: 650; }
.card p { color: var(--text-2); font-size: 15px; }

.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.scene {
  background: var(--white); border-radius: 20px; padding: 26px 24px 24px;
  border: 1px solid var(--line-dark); box-shadow: 0 10px 30px rgba(16,36,69,.05);
  transition: transform .2s ease, box-shadow .2s ease;
  min-height: 220px;
}
.scene:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.scene .tag {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #1b7cff, #3ec8ff);
  color: #fff; font-weight: 700; margin-bottom: 16px; font-size: 14px;
}
.scene h3 { font-size: 20px; margin-bottom: 8px; }
.scene p { color: var(--ink-2); font-size: 14.5px; }

.page-hero {
  padding: calc(var(--header-h) + 78px) 0 70px;
  background:
    linear-gradient(90deg, rgba(5,9,20,.78), rgba(5,9,20,.45)),
    url("../assets/technology_banner1.jpg") center/cover no-repeat;
  color: #fff;
}
.page-hero.about { background-image: linear-gradient(90deg, rgba(5,9,20,.8), rgba(5,9,20,.4)), url("../assets/about_banner_bg.jpg"); }
.page-hero.media {
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--header-h) + 40px) 0 80px;
  background-image: linear-gradient(180deg, rgba(5,9,20,.48), rgba(5,9,20,.58)), url("../assets/media_bg.jpg");
  background-size: cover;
  background-position: center;
}
.page-hero.media h1 {
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.2;
  margin: 0 0 18px;
  letter-spacing: .16em;
  font-weight: 700;
}
.page-hero.media p {
  max-width: none;
  margin: 0 auto;
  font-size: clamp(15px, 1.6vw, 20px);
  color: rgba(234,241,251,.86);
  letter-spacing: .08em;
  font-weight: 400;
}
.page-hero h1 { font-size: clamp(32px, 4.5vw, 52px); line-height: 1.2; margin: 12px 0 14px; }
.page-hero p { max-width: 720px; color: var(--text-2); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.feature {
  background: #fff; border-radius: 20px; padding: 30px;
  border: 1px solid var(--line-dark);
}
.feature h3 { font-size: 22px; margin-bottom: 10px; }
.feature p { color: var(--ink-2); }

.spec-wrap {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; align-items: stretch;
}
.spec-main {
  background:
    linear-gradient(180deg, rgba(7,17,31,.25), rgba(7,17,31,.72)),
    url("../assets/technology_bg.jpg") center/cover no-repeat;
  border-radius: 24px; color: #fff; padding: 36px 32px; min-height: 420px;
}
.spec-main .name { letter-spacing: .2em; color: var(--cyan-300); font-size: 13px; }
.spec-main h3 { font-size: 34px; margin: 10px 0 8px; }
.spec-tag { margin-top: 18px; color: #9ed8ff; letter-spacing: .12em; }
.spec-list { display: grid; gap: 14px; }
.spec-item {
  background: #fff; border-radius: 16px; padding: 20px 22px; border: 1px solid var(--line-dark);
  color: var(--ink);
}
.spec-item b { display: block; font-size: 18px; margin-bottom: 4px; color: #0d1b2a; font-weight: 700; }
.spec-item span { color: var(--ink-2); font-size: 14px; }

.pillars { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.tabs { display: flex; justify-content: center; gap: 12px; margin-bottom: 32px; }
.tab {
  min-width: 148px; height: 46px; border-radius: 12px;
  border: 1px solid #d7e4f5; background: #fff; color: #35506d; font-size: 15px;
}
.tab.active {
  background: linear-gradient(90deg, #1b7cff, #3d93ff); color: #fff; border-color: transparent;
}
.news-list { display: grid; gap: 16px; }
.news {
  display: grid; grid-template-columns: 240px 1fr auto; gap: 22px; align-items: center;
  background: #fff; border-radius: 18px; padding: 14px; border: 1px solid var(--line-dark);
}
.news img { width: 240px; height: 140px; object-fit: cover; border-radius: 12px; }
.news h3 { font-size: 20px; margin-bottom: 8px; }
.news p { color: var(--ink-2); font-size: 14px; }
.news time { color: var(--muted); font-size: 13px; display: block; margin-top: 10px; }
.news .more { color: var(--blue-500); font-size: 14px; white-space: nowrap; padding-right: 10px; }

.idea-grid { display: grid; grid-template-columns: 1fr 1fr 1.35fr; gap: 18px; }
.idea {
  background: #fff; border-radius: 20px; padding: 28px 24px; border: 1px solid var(--line-dark);
  min-height: 280px;
}
.idea img { width: 54px; margin-bottom: 16px; }
.idea .label { color: var(--blue-500); font-size: 13px; letter-spacing: .12em; }
.idea h3 { font-size: 24px; margin: 4px 0 12px; }
.idea p { color: var(--ink-2); font-size: 15px; }

.timeline {
  display: grid; grid-template-columns: 280px 1fr; gap: 28px; align-items: center;
  background: #fff; border-radius: 24px; overflow: hidden; border: 1px solid var(--line-dark);
}
.timeline-copy { padding: 32px; }
.timeline-copy h3 { margin-bottom: 18px; }
.tl { display: grid; gap: 16px; }
.tl li { display: grid; grid-template-columns: 72px 1fr; gap: 12px; }
.tl b { color: var(--blue-500); }
.timeline img { width: 100%; height: 100%; object-fit: cover; min-height: 280px; }

.contact-band {
  background:
    linear-gradient(180deg, rgba(7,17,31,.55), rgba(7,17,31,.7)),
    url("../assets/about_contact_bg.jpg") center/cover no-repeat;
  color: #fff; text-align: center;
}
.contact-band h2 { font-size: 40px; margin-bottom: 8px; }
.contact-items { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.contact-items div {
  background: rgba(255,255,255,.08); border: 1px solid var(--line); border-radius: 16px; padding: 22px 16px;
}

.cta {
  background: linear-gradient(90deg, #0b1a33, #12305e);
  color: #fff; border-radius: 24px; padding: 36px 40px;
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
}
.cta h3 { font-size: 28px; margin-bottom: 6px; }
.cta p { color: var(--text-2); }

.site-footer {
  background: #050914 url("../assets/bottom_bg.jpg") center/cover no-repeat;
  color: rgba(234,241,251,.82); padding: 48px 0 22px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.1fr .7fr 1.4fr .6fr; gap: 28px; align-items: start;
}
.site-footer .logo img { width: 145px; height: auto; max-width: none; }
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
  background: var(--navy-950);
  color: var(--text);
}
.error-page h1 { font-size: 32px; margin-bottom: 18px; }
.error-page a {
  display: inline-block;
  margin-top: 8px;
  color: var(--cyan-400);
  border-bottom: 1px solid rgba(62,200,255,.35);
}
.site-footer a:hover { color: #fff; }
.site-footer h4 { color: #fff; margin-bottom: 12px; font-size: 15px; }
.site-footer p, .site-footer li { font-size: 14px; margin-bottom: 8px; color: rgba(234,241,251,.72); }
.qr { width: 92px; border-radius: 8px; background: #fff; padding: 4px; }
.icp { margin-top: 28px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,.08); font-size: 12px; color: rgba(255,255,255,.45); }

@media (max-width: 980px) {
  .menu-btn { display: block; }
  .nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    display: none; flex-direction: column; gap: 0;
    background: rgba(5,9,20,.96); padding: 10px 20px 18px;
  }
  .nav.open { display: flex; }
  .nav > a { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.06); width: 100%; }
  .lang { width: 100%; padding: 12px 0; }
  .metrics, .cards-3, .scene-grid, .about-grid, .split, .spec-wrap, .idea-grid, .timeline, .contact-items, .footer-grid, .news, .pillars {
    grid-template-columns: 1fr;
  }
  .news img { width: 100%; height: 180px; }
  .cta { flex-direction: column; align-items: flex-start; }
  .hero { min-height: auto; }
}