/* =================================================================
 * 河北臣讯网络科技有限公司 官网样式
 * design: 编辑风企业级 / Editorial Enterprise
 * ============================================================== */

/* ---------- 1. Reset & Tokens ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body, h1, h2, h3, h4, h5, h6, p, ul, ol, dl, figure, blockquote { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; border: 0; background: transparent; color: inherit; cursor: pointer; padding: 0; }
input, select, textarea { font: inherit; color: inherit; }

:root {
  /* surface */
  --bg: #ffffff;
  --bg-tint: #f6f8fc;
  --bg-soft: #eef2f8;
  --bg-deep: #061226;
  --bg-deeper: #030a18;

  /* ink */
  --ink: #0a1830;
  --ink-2: #44516b;
  --ink-3: #8893a8;
  --ink-on-deep: #e9eef6;
  --ink-on-deep-2: #94a0b8;

  /* brand */
  --brand: #1457e0;
  --brand-deep: #0a3aa8;
  --brand-soft: #e7efff;
  --accent: #00b8e8;

  /* lines */
  --line: #e6ebf2;
  --line-strong: #c8d1de;
  --line-soft: #f0f3f8;
  --line-on-deep: #1a2845;

  /* type */
  --ff-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
             "Microsoft YaHei UI", "Microsoft YaHei", Helvetica, Arial, sans-serif;
  --ff-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --ff-serif: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", Georgia, serif;

  /* layout */
  --container: 1240px;
  --container-pad: 32px;

  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 16px;

  --shadow-soft: 0 1px 2px rgba(10,24,48,0.04), 0 4px 16px rgba(10,24,48,0.04);
  --shadow-card: 0 1px 3px rgba(10,24,48,0.06), 0 12px 36px -8px rgba(10,24,48,0.08);

  /* motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--ff-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  text-rendering: optimizeLegibility;
  font-feature-settings: "tnum" 1, "ss01" 1;
}

::selection { background: var(--brand); color: #fff; }

/* ---------- 2. Layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.container--narrow { max-width: 920px; }

/* ---------- 3. Top nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0;
  height: 68px;
  background: rgba(255,255,255,0.88);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--line-soft);
  z-index: 100;
  transition: box-shadow .2s var(--ease);
}
.nav.is-scrolled { box-shadow: 0 1px 0 var(--line); }

.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 56px;
}

.brand {
  display: flex; align-items: baseline; gap: 10px;
  flex-shrink: 0;
}
.brand__mark {
  font-family: var(--ff-mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--brand);
  font-weight: 600;
}
.brand__cn {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink);
}
.brand__en {
  font-family: var(--ff-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  text-transform: uppercase;
  display: none;
}

.nav__menu {
  display: flex; align-items: center; gap: 36px;
  flex: 1;
}
.nav__menu a {
  position: relative;
  font-size: 14px;
  color: var(--ink-2);
  padding: 24px 0;
  transition: color .2s var(--ease);
}
.nav__menu a:hover { color: var(--ink); }
.nav__menu a.is-active { color: var(--ink); font-weight: 500; }
.nav__menu a.is-active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px;
  height: 2px; background: var(--brand);
}

.nav__cta {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--ff-mono); font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.nav__cta::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: #20c46b; box-shadow: 0 0 0 3px rgba(32,196,107,0.16); }

/* mobile nav toggle */
.nav__toggle {
  display: none;
  width: 32px; height: 32px;
  margin-left: auto;
  position: relative;
}
.nav__toggle span {
  position: absolute; left: 6px; right: 6px;
  height: 1.5px; background: var(--ink);
  transition: transform .25s var(--ease), opacity .15s var(--ease);
}
.nav__toggle span:nth-child(1) { top: 11px; }
.nav__toggle span:nth-child(2) { top: 16px; }
.nav__toggle span:nth-child(3) { top: 21px; }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ---------- 4. Section primitives ---------- */
main { padding-top: 68px; }

.section {
  position: relative;
  padding: 120px 0;
}
.section--tight { padding: 80px 0; }
.section--xtight { padding: 56px 0; }
.section--dark {
  background: var(--bg-deep);
  color: var(--ink-on-deep);
}
.section--tint { background: var(--bg-tint); }

.section__index {
  display: flex; align-items: baseline; gap: 14px;
  margin-bottom: 28px;
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.section--dark .section__index { color: var(--ink-on-deep-2); }
.section__index .num {
  color: var(--brand);
  font-weight: 600;
}
.section--dark .section__index .num { color: var(--accent); }
.section__index .rule {
  flex: 0 0 40px;
  height: 1px; background: var(--line-strong);
}
.section--dark .section__index .rule { background: var(--line-on-deep); }

.section__title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.25;
  max-width: 720px;
}
.section__title .accent { color: var(--brand); }
.section--dark .section__title .accent { color: var(--accent); }

.section__lede {
  margin-top: 20px;
  max-width: 640px;
  color: var(--ink-2);
  font-size: 16px;
  line-height: 1.85;
}
.section--dark .section__lede { color: var(--ink-on-deep-2); }

.section__header {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 48px;
  margin-bottom: 64px;
}
.section__header-side {
  flex-shrink: 0;
  padding-bottom: 4px;
  font-family: var(--ff-mono); font-size: 12px;
  letter-spacing: 0.16em; color: var(--ink-3);
  text-transform: uppercase;
}

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  height: 46px; padding: 0 22px;
  font-size: 14px; font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all .2s var(--ease);
  white-space: nowrap;
}
.btn--primary {
  background: var(--ink);
  color: #fff;
}
.btn--primary:hover { background: var(--brand); }
.btn--brand {
  background: var(--brand);
  color: #fff;
}
.btn--brand:hover { background: var(--brand-deep); }
.btn--ghost {
  border: 1px solid var(--line-strong);
  color: var(--ink);
}
.btn--ghost:hover { border-color: var(--ink); }
.btn--on-deep {
  border: 1px solid rgba(255,255,255,0.24);
  color: #fff;
}
.btn--on-deep:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.42); }
.btn .arr { transition: transform .2s var(--ease); }
.btn:hover .arr { transform: translateX(3px); }

/* ---------- 6. HERO ---------- */
.hero {
  position: relative;
  padding: 80px 0 120px;
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--ff-mono); font-size: 12px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--brand);
  padding: 7px 14px;
  border: 1px solid var(--brand-soft);
  background: var(--brand-soft);
  border-radius: 999px;
}
.hero__eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--brand); }

.hero__title {
  margin-top: 32px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  font-weight: 600;
  color: var(--ink);
}
.hero__title em {
  font-style: normal;
  color: var(--brand);
  font-weight: 700;
}
.hero__title .light { color: var(--ink-3); font-weight: 300; }

.hero__lede {
  margin-top: 28px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 540px;
}

.hero__actions {
  margin-top: 40px;
  display: flex; gap: 16px;
}

.hero__meta {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.hero__meta-item {
  padding-right: 16px;
  min-width: 0;
  overflow: hidden;
}
.hero__meta-item + .hero__meta-item {
  border-left: 1px solid var(--line);
  padding-left: 24px;
}
.hero__meta-num {
  font-size: 32px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  display: flex; align-items: baseline; gap: 4px;
}
.hero__meta-num .unit { font-size: 14px; color: var(--ink-3); font-weight: 400; }
.hero__meta-label {
  margin-top: 10px;
  line-height: 1.4;
}
.hero__meta-label .lbl-en {
  display: block;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.hero__meta-label .lbl-cn {
  display: block;
  margin-top: 3px;
  font-size: 13px;
  color: var(--ink-2);
  letter-spacing: 0.04em;
}

/* hero visual */
.hero__visual {
  position: relative;
  aspect-ratio: 5 / 5.6;
  border-radius: 6px;
  overflow: hidden;
  background: #0a3ea8;
}
.hero__visual::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,0.25) 100%);
  z-index: 2;
}
.hero__visual img {
  width: 100%; height: 100%; object-fit: cover;
  transform: scale(1.02);
}
.hero__visual-caption {
  position: absolute; left: 24px; bottom: 24px;
  z-index: 3;
  color: #fff;
}
.hero__visual-caption .tag {
  display: inline-block;
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.2em; text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 999px;
  margin-bottom: 14px;
}
.hero__visual-caption h3 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.hero__visual-caption p {
  margin-top: 6px;
  font-size: 13px;
  opacity: 0.78;
  max-width: 280px;
}

.hero__corner {
  position: absolute;
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.2em; color: var(--ink-3);
  text-transform: uppercase;
}
.hero__corner--tl { top: 24px; left: var(--container-pad); }
.hero__corner--tr { top: 24px; right: var(--container-pad); }
.hero__corner-bar { display: inline-block; width: 24px; height: 1px; background: var(--ink-3); vertical-align: middle; margin: 0 8px; }

/* ---------- 7. Marquee divider ---------- */
.tickerbar {
  background: var(--ink);
  color: var(--ink-on-deep-2);
  border-top: 1px solid var(--line-on-deep);
  border-bottom: 1px solid var(--line-on-deep);
  overflow: hidden;
}
.tickerbar__track {
  display: flex;
  gap: 64px;
  padding: 18px 0;
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  white-space: nowrap;
  animation: ticker 60s linear infinite;
  width: max-content;
}
.tickerbar__track span { display: inline-flex; align-items: center; gap: 64px; }
.tickerbar__track .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--brand); }
@keyframes ticker {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ---------- 8. Card grids ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.feature-grid--3 { grid-template-columns: repeat(3, 1fr); }

.feature {
  position: relative;
  padding: 40px 36px 44px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  transition: background .25s var(--ease);
}
.feature:hover { background: var(--bg-tint); }
.feature__num {
  font-family: var(--ff-mono);
  font-size: 12px; letter-spacing: 0.16em;
  color: var(--brand);
  margin-bottom: 24px;
}
.feature__title {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  margin-bottom: 14px;
}
.feature__title-en {
  font-family: var(--ff-mono);
  font-size: 11px; letter-spacing: 0.18em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.feature__body {
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.85;
}
.feature__tag {
  margin-top: 24px;
  font-family: var(--ff-mono);
  font-size: 11px; letter-spacing: 0.14em;
  color: var(--ink-3); text-transform: uppercase;
}

/* ---------- 9. Showcase split (product) ---------- */
.showcase {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: center;
}
.showcase--flip { grid-template-columns: 1fr 1.1fr; }
.showcase--flip .showcase__visual { order: 2; }
.showcase__visual {
  position: relative;
  background: #0a3ea8;
  border-radius: 4px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.showcase__visual img { width: 100%; height: 100%; object-fit: cover; }
.showcase__visual--photo { background: var(--bg-soft); }
.showcase__tag {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: 11px; letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brand);
  padding: 5px 12px;
  border: 1px solid var(--brand-soft);
  background: var(--brand-soft);
  border-radius: 999px;
}
.showcase__title {
  margin-top: 22px;
  font-size: 36px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.25;
}
.showcase__title-en {
  font-family: var(--ff-mono);
  font-size: 12px; letter-spacing: 0.2em;
  color: var(--ink-3); text-transform: uppercase;
  margin-top: 10px;
}
.showcase__body {
  margin-top: 24px;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.9;
}
.showcase__points {
  margin-top: 28px;
  display: grid; gap: 16px;
}
.showcase__point {
  display: flex; align-items: flex-start; gap: 14px;
  font-size: 14px; color: var(--ink-2);
}
.showcase__point::before {
  content: ""; flex-shrink: 0;
  width: 14px; height: 1px;
  background: var(--brand);
  margin-top: 12px;
}
.showcase__point strong { display: block; color: var(--ink); font-weight: 600; margin-bottom: 2px; }
.showcase__cta { margin-top: 36px; }

/* ---------- 10. Stats row ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-on-deep);
  border-bottom: 1px solid var(--line-on-deep);
}
.stats__item {
  padding: 48px 28px;
  border-right: 1px solid var(--line-on-deep);
}
.stats__item:last-child { border-right: 0; }
.stats__num {
  font-size: 56px;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1;
  display: flex; align-items: baseline; gap: 6px;
}
.stats__num .unit { font-size: 18px; color: var(--ink-on-deep-2); font-weight: 400; }
.stats__num .pre { font-size: 18px; color: var(--ink-on-deep-2); font-weight: 400; }
.stats__label {
  margin-top: 14px;
  font-size: 13px;
  color: var(--ink-on-deep-2);
  line-height: 1.6;
}
.stats__sub {
  margin-top: 6px;
  font-family: var(--ff-mono); font-size: 10px;
  letter-spacing: 0.18em; color: rgba(255,255,255,0.35);
  text-transform: uppercase;
}

/* ---------- 11. Timeline ---------- */
.timeline { position: relative; display: grid; gap: 0; }
.timeline__row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 48px;
  padding: 36px 0;
  border-top: 1px solid var(--line);
  transition: background .2s var(--ease);
}
.timeline__row:last-child { border-bottom: 1px solid var(--line); }
.timeline__row:hover { background: var(--bg-tint); padding-left: 16px; padding-right: 16px; }
.timeline__year {
  font-family: var(--ff-mono);
  font-size: 28px;
  font-weight: 500;
  color: var(--brand);
  letter-spacing: 0.02em;
}
.timeline__year-sub {
  margin-top: 4px;
  font-family: var(--ff-mono); font-size: 10px;
  letter-spacing: 0.18em; color: var(--ink-3);
  text-transform: uppercase;
}
.timeline__title {
  font-size: 20px; font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}
.timeline__body { color: var(--ink-2); font-size: 14px; line-height: 1.85; max-width: 560px; }

/* ---------- 12. News list ---------- */
.news-list { border-top: 1px solid var(--line); }
.news-item {
  display: grid;
  grid-template-columns: 140px 1fr 240px auto;
  gap: 40px;
  padding: 32px 0;
  align-items: center;
  border-bottom: 1px solid var(--line);
  transition: background .2s var(--ease), padding .2s var(--ease);
}
.news-item:hover {
  background: var(--bg-tint);
  padding-left: 20px;
  padding-right: 20px;
}
.news-item__date {
  font-family: var(--ff-mono);
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
}
.news-item__date .y { color: var(--ink); font-weight: 500; }
.news-item__title {
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.5;
}
.news-item__excerpt {
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.7;
}
.news-item__more {
  font-family: var(--ff-mono); font-size: 12px;
  letter-spacing: 0.16em; color: var(--ink-3);
  text-transform: uppercase;
  transition: color .2s var(--ease);
}
.news-item:hover .news-item__more { color: var(--brand); }

/* ---------- 13. CTA band ---------- */
.cta-band {
  background: var(--ink);
  color: #fff;
  padding: 88px 0;
}
.cta-band__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
}
.cta-band__title {
  font-size: 36px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.25;
}
.cta-band__title em { font-style: normal; color: var(--accent); }
.cta-band__sub {
  margin-top: 14px;
  color: var(--ink-on-deep-2);
  font-size: 15px;
}
.cta-band__actions { display: flex; gap: 16px; }

/* ---------- 14. Footer ---------- */
.footer {
  background: var(--bg-deeper);
  color: var(--ink-on-deep-2);
  padding: 80px 0 32px;
  font-size: 13px;
}
.footer a { color: var(--ink-on-deep-2); transition: color .2s var(--ease); }
.footer a:hover { color: #fff; }

.footer__top {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr) 1.1fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line-on-deep);
}
.footer__brand .brand__cn { color: #fff; font-size: 20px; letter-spacing: 0.12em; }
.footer__brand .brand__mark { color: var(--accent); }
.footer__brand-en {
  margin-top: 12px;
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.18em; color: rgba(255,255,255,0.4);
  text-transform: uppercase;
}
.footer__brand-desc {
  margin-top: 20px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  line-height: 1.8;
  max-width: 280px;
}

.footer__col h4 {
  color: rgba(255,255,255,0.92);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-on-deep);
}
.footer__col ul li { margin-bottom: 12px; }

.footer__contact-row {
  display: flex; align-items: flex-start; gap: 10px;
  margin-bottom: 14px;
  line-height: 1.7;
}
.footer__contact-row .lbl {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  flex-shrink: 0;
  margin-top: 4px;
}
.footer__contact-row .val { color: rgba(255,255,255,0.85); }

.footer__legal {
  display: flex; flex-wrap: wrap;
  gap: 36px;
  padding: 28px 0 24px;
  border-top: 1px solid var(--line-on-deep);
}
.footer__legal-row {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 13px;
}
.footer__legal-row .lbl {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
}
.footer__legal-row a {
  color: rgba(255,255,255,0.92);
  border-bottom: 1px dotted rgba(255,255,255,0.28);
  padding-bottom: 2px;
  letter-spacing: 0.02em;
}
.footer__legal-row a:hover { color: #fff; border-bottom-color: rgba(255,255,255,0.7); }

.footer__bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--line-on-deep);
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}
.footer__bottom-left { display: flex; flex-wrap: wrap; gap: 16px; }
.footer__bottom-left a { font-family: var(--ff-mono); letter-spacing: 0.06em; }
.footer__bottom-right { font-family: var(--ff-mono); letter-spacing: 0.06em; }

/* ---------- 15. Sub-page hero (about, news, etc.) ---------- */
.pagehero {
  position: relative;
  background: var(--bg-tint);
  padding: 88px 0 80px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.pagehero__crumb {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--ff-mono); font-size: 12px;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 32px;
}
.pagehero__crumb .num { color: var(--brand); font-weight: 600; }
.pagehero__crumb a { color: var(--ink-3); transition: color .2s; }
.pagehero__crumb a:hover { color: var(--ink); }

.pagehero__title {
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.1;
}
.pagehero__title-en {
  margin-top: 18px;
  font-family: var(--ff-mono); font-size: 13px;
  letter-spacing: 0.24em; color: var(--ink-3);
  text-transform: uppercase;
}
.pagehero__lede {
  margin-top: 28px;
  max-width: 620px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-2);
}

/* watermark big char in pagehero */
.pagehero__char {
  position: absolute;
  right: -32px; bottom: -64px;
  font-family: var(--ff-serif);
  font-size: 320px;
  line-height: 1;
  font-weight: 400;
  color: rgba(20,87,224,0.04);
  letter-spacing: -0.04em;
  user-select: none; pointer-events: none;
}

/* ---------- 16. Article / long-form (privacy, terms, about) ---------- */
.article {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 80px;
  align-items: flex-start;
}
.article__toc {
  position: sticky;
  top: 96px;
  font-size: 13px;
}
.article__toc h5 {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.article__toc ol {
  counter-reset: toc;
  list-style: none;
  padding: 0;
}
.article__toc li {
  counter-increment: toc;
  margin-bottom: 10px;
}
.article__toc a {
  display: flex; gap: 10px;
  padding: 6px 0;
  color: var(--ink-2);
  border-left: 1px solid var(--line);
  padding-left: 12px;
  transition: border-color .2s, color .2s;
}
.article__toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--ff-mono);
  color: var(--ink-3);
  font-size: 11px;
  letter-spacing: 0.08em;
  flex-shrink: 0;
  padding-top: 2px;
}
.article__toc a:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.article__content { font-size: 15px; line-height: 1.85; color: var(--ink-2); max-width: 760px; }
.article__content h2 {
  font-size: 26px;
  font-weight: 600;
  color: var(--ink);
  margin: 56px 0 18px;
  letter-spacing: 0.02em;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  display: flex; align-items: baseline; gap: 14px;
}
.article__content h2:first-child { margin-top: 0; }
.article__content h2 .num {
  font-family: var(--ff-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--brand);
  font-weight: 500;
}
.article__content h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin: 32px 0 10px;
}
.article__content p { margin: 0 0 18px; }
.article__content ul, .article__content ol {
  margin: 0 0 20px 0;
  padding-left: 22px;
}
.article__content ul li, .article__content ol li { margin-bottom: 8px; list-style: disc; }
.article__content ol li { list-style: decimal; }
.article__content strong { color: var(--ink); font-weight: 600; }
.article__content .meta {
  margin-bottom: 32px;
  padding: 20px 24px;
  background: var(--bg-tint);
  border-left: 3px solid var(--brand);
  font-size: 14px;
  display: grid; gap: 8px;
}
.article__content .meta div { display: flex; gap: 14px; }
.article__content .meta .lbl {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-3);
  min-width: 80px;
  padding-top: 3px;
}

/* ---------- 17. Contact page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
}
.contact-card {
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 40px;
}
.contact-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.contact-card h3-en {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.2em; color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 24px;
}
.contact-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.contact-row:last-child { border-bottom: 1px solid var(--line); }
.contact-row .lbl {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 3px;
}
.contact-row .val {
  font-size: 15px;
  color: var(--ink);
  line-height: 1.7;
}
.contact-row .val .big {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.contact-form-card {
  background: var(--ink);
  color: #fff;
  padding: 48px 44px;
}
.contact-form-card h3 { color: #fff; font-size: 24px; margin-bottom: 8px; font-weight: 600; }
.contact-form-card .sub {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.2em; color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  margin-bottom: 32px;
}
.field { margin-bottom: 20px; }
.field label {
  display: block;
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-bottom: 8px;
}
.field input,
.field textarea,
.field select {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  padding: 10px 0;
  color: #fff;
  font-size: 15px;
  outline: none;
  transition: border-color .2s;
}
.field input::placeholder, .field textarea::placeholder {
  color: rgba(255,255,255,0.32);
}
.field input:focus, .field textarea:focus { border-bottom-color: var(--accent); }
.field textarea { resize: vertical; min-height: 88px; }
.contact-form-card .btn {
  margin-top: 16px;
}

/* ---------- 18. Capability grid (about page) ---------- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.cap {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 36px;
  display: flex; flex-direction: column;
  min-height: 220px;
  background: var(--bg);
}
.cap__index {
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.18em; color: var(--brand);
  margin-bottom: 24px;
}
.cap__title { font-size: 18px; font-weight: 600; margin-bottom: 12px; letter-spacing: 0.02em; }
.cap__body { color: var(--ink-2); font-size: 13px; line-height: 1.85; }

/* ---------- 18.5 License / 资质证照 ---------- */
.license {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 64px;
  align-items: start;
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 40px;
}
.license__thumb {
  position: relative;
  display: block;
  background: var(--bg-tint);
  border: 1px solid var(--line);
  overflow: hidden;
  aspect-ratio: 2104 / 3000;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.license__thumb:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); }
.license__thumb img { width: 100%; height: 100%; object-fit: contain; display: block; }
.license__thumb::after {
  content: "点击查看大图 ↗";
  position: absolute;
  left: 12px; bottom: 12px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 6px 10px;
  background: rgba(10,24,48,0.84);
  color: #fff;
  border-radius: 3px;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity .2s var(--ease), transform .2s var(--ease);
}
.license__thumb:hover::after { opacity: 1; transform: translateY(0); }

.license__body h3 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 6px;
}
.license__body .en {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 24px;
}
.license__no {
  display: inline-block;
  padding: 8px 14px;
  font-family: var(--ff-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--brand-deep);
  background: var(--brand-soft);
  border-radius: 3px;
  margin-bottom: 28px;
}
.license__meta {
  border-top: 1px solid var(--line);
}
.license__meta-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  align-items: start;
}
.license__meta-row .lbl {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  text-transform: uppercase;
  padding-top: 4px;
}
.license__meta-row .val { color: var(--ink); }
.license__meta-row .val strong { font-weight: 600; color: var(--ink); }
.license__cta { margin-top: 32px; display: inline-flex; }

@media (max-width: 1024px) {
  .license { grid-template-columns: 1fr; gap: 32px; padding: 28px; }
  .license__thumb { max-width: 380px; }
}

/* ---------- 19. Product detail ---------- */
.product-hero {
  background: linear-gradient(180deg, #0a3ea8 0%, #062180 100%);
  color: #fff;
  padding: 120px 0 0;
  border-bottom: 1px solid var(--line-on-deep);
  position: relative;
  overflow: hidden;
}
.product-hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: end;
}
.product-hero__tag {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--ff-mono); font-size: 12px;
  letter-spacing: 0.2em; text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 999px;
  color: #fff;
}
.product-hero__tag::before { content: ""; width: 6px; height: 6px; background: var(--accent); border-radius: 50%; }
.product-hero__title {
  margin-top: 24px;
  font-size: clamp(48px, 6vw, 80px);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.05;
}
.product-hero__title-en {
  margin-top: 14px;
  font-family: var(--ff-mono); font-size: 14px;
  letter-spacing: 0.24em; color: rgba(255,255,255,0.6);
  text-transform: uppercase;
}
.product-hero__lede {
  margin-top: 32px;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(255,255,255,0.78);
  max-width: 480px;
}
.product-hero__platforms {
  margin-top: 36px;
  display: flex; gap: 36px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.16);
  margin-bottom: 60px;
}
.product-hero__platform {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  display: flex; align-items: center; gap: 10px;
}
.product-hero__platform::before { content: ""; width: 6px; height: 6px; background: var(--accent); transform: rotate(45deg); }
.product-hero__visual {
  align-self: end;
  padding-bottom: 0;
}
.product-hero__visual img {
  width: 100%; max-width: 560px;
  border-radius: 4px 4px 0 0;
  box-shadow: 0 -24px 80px -16px rgba(0,0,0,0.35);
}

.product-hero__bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
  pointer-events: none;
}

/* product feature blocks */
.pfeat {
  display: grid;
  grid-template-columns: 200px 1fr 200px;
  gap: 64px;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.pfeat:last-child { border-bottom: 0; }
.pfeat__index {
  font-family: var(--ff-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--brand);
}
.pfeat__title {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.25;
  margin-bottom: 16px;
}
.pfeat__title-en {
  font-family: var(--ff-mono); font-size: 12px;
  letter-spacing: 0.18em; color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.pfeat__body { color: var(--ink-2); font-size: 15px; line-height: 1.9; }
.pfeat__side {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  line-height: 1.7;
  padding-top: 8px;
}
.pfeat__side .num {
  font-family: var(--ff-mono);
  font-size: 32px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
  display: block;
  margin-bottom: 6px;
}

/* ---------- 20. responsive ---------- */
@media (max-width: 1024px) {
  .hero__grid { grid-template-columns: 1fr; gap: 48px; }
  .hero__visual { max-width: 480px; }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer__brand { grid-column: 1 / -1; }
  .showcase, .showcase--flip { grid-template-columns: 1fr; gap: 40px; }
  .showcase--flip .showcase__visual { order: 0; }
  .article { grid-template-columns: 1fr; gap: 32px; }
  .article__toc { position: static; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .pfeat { grid-template-columns: 1fr; gap: 16px; }
  .pfeat__side { padding-top: 0; display: flex; gap: 32px; }
  .pfeat__side .num { display: inline; margin-bottom: 0; font-size: 22px; }
  .product-hero__grid { grid-template-columns: 1fr; gap: 32px; }
  .product-hero__visual { padding-bottom: 0; }
}

@media (max-width: 768px) {
  :root { --container-pad: 20px; }
  .nav { height: 60px; }
  main { padding-top: 60px; }
  .nav__menu { display: none; }
  .nav__cta { display: none; }
  .nav__toggle { display: block; }
  .nav__inner { gap: 0; }

  .nav__menu.is-open {
    display: flex; flex-direction: column;
    position: fixed; top: 60px; left: 0; right: 0;
    background: #fff;
    padding: 24px var(--container-pad);
    border-bottom: 1px solid var(--line);
    align-items: flex-start;
    gap: 4px;
    box-shadow: 0 20px 40px -10px rgba(10,24,48,0.1);
  }
  .nav__menu.is-open a { width: 100%; padding: 16px 0; border-bottom: 1px solid var(--line-soft); font-size: 16px; }

  .section { padding: 72px 0; }
  .section--tight { padding: 56px 0; }
  .section__header { flex-direction: column; align-items: flex-start; gap: 16px; margin-bottom: 40px; }

  .hero { padding: 56px 0 72px; }
  .hero__title { font-size: 36px; }
  .hero__meta { grid-template-columns: 1fr; gap: 20px; }
  .hero__meta-item + .hero__meta-item { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; padding-top: 20px; }
  .hero__corner { display: none; }

  .feature-grid, .feature-grid--3, .cap-grid { grid-template-columns: 1fr; }

  .stats { grid-template-columns: 1fr 1fr; }
  .stats__item { padding: 32px 20px; }
  .stats__item:nth-child(2) { border-right: 0; }
  .stats__item:nth-child(1), .stats__item:nth-child(2) { border-bottom: 1px solid var(--line-on-deep); }
  .stats__num { font-size: 40px; }

  .timeline__row { grid-template-columns: 1fr; gap: 16px; padding: 28px 0; }
  .timeline__row:hover { padding-left: 0; padding-right: 0; }

  .news-item { grid-template-columns: 1fr; gap: 8px; padding: 24px 0; }
  .news-item:hover { padding-left: 0; padding-right: 0; }
  .news-item__excerpt { display: none; }
  .news-item__more { display: none; }

  .cta-band { padding: 56px 0; }
  .cta-band__inner { grid-template-columns: 1fr; gap: 28px; }
  .cta-band__title { font-size: 26px; }
  .cta-band__actions { flex-wrap: wrap; }

  .footer__top { grid-template-columns: 1fr; gap: 40px; }
  .footer__brand { grid-column: auto; }

  .pagehero { padding: 56px 0; }
  .pagehero__char { font-size: 200px; right: -16px; bottom: -32px; }

  .pfeat__title { font-size: 24px; }
  .product-hero__title { font-size: 44px; }
  .product-hero { padding: 80px 0 0; }
}