/* 长沙光引科技有限公司 — 官网样式 */

:root {
  --ink: #101724;
  --ink-2: #1d2938;
  --body: #47536a;
  --muted: #77839a;
  --line: #e5e9f0;
  --line-2: #eef1f6;
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --bg-deep: #0d1420;
  --brand: #2f6bff;
  --brand-2: #6d5cff;
  --brand-3: #00c2d4;
  --brand-soft: #eef3ff;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(16, 23, 36, .05), 0 2px 8px rgba(16, 23, 36, .04);
  --shadow: 0 4px 12px rgba(16, 23, 36, .06), 0 16px 40px rgba(16, 23, 36, .07);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --maxw: 1160px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: none; }

h1, h2, h3, h4 {
  color: var(--ink);
  line-height: 1.35;
  margin: 0;
  font-weight: 700;
  letter-spacing: -.01em;
}

p { margin: 0; }

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 顶栏 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-2);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .01em;
  flex-shrink: 0;
}

.logo .mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 55%, var(--brand-3) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 3px 10px rgba(47, 107, 255, .3);
  flex-shrink: 0;
}

.logo .mark svg { width: 17px; height: 17px; display: block; }
.logo .zh { font-weight: 700; }
.logo .en {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: .06em;
  border-left: 1px solid var(--line);
  padding-left: 10px;
  margin-left: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-links a {
  color: var(--body);
  font-size: 15px;
  padding: 8px 14px;
  border-radius: 8px;
  transition: background .18s ease, color .18s ease;
  white-space: nowrap;
}

.nav-links a:hover { background: var(--bg-soft); color: var(--ink); }
.nav-links a.active { color: var(--brand); font-weight: 600; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 17px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 17px;
  height: 1.5px;
  background: var(--ink);
}

.nav-toggle span::before { top: -5.5px; }
.nav-toggle span::after { top: 5.5px; }

/* ---------- 通用区块 ---------- */

.section { padding: 92px 0; }
.section-soft { background: var(--bg-soft); }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--brand);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.section-head h2 {
  font-size: 34px;
  margin-bottom: 16px;
}

.section-head p { font-size: 17px; color: var(--body); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 4px 14px rgba(47, 107, 255, .28);
}

.btn-primary:hover { background: #2559e0; transform: translateY(-1px); }

.btn-ghost {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost:hover { border-color: #cfd6e2; transform: translateY(-1px); }

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  padding: 104px 0 96px;
  overflow: hidden;
  background:
    radial-gradient(900px 460px at 12% -8%, rgba(47, 107, 255, .10), transparent 62%),
    radial-gradient(760px 420px at 92% 4%, rgba(0, 194, 212, .10), transparent 60%),
    linear-gradient(180deg, #fbfcfe 0%, #ffffff 100%);
  border-bottom: 1px solid var(--line-2);
}

.hero-inner { max-width: 830px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  padding: 0 14px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--body);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  margin-bottom: 26px;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-3));
}

.hero h1 {
  font-size: 50px;
  line-height: 1.22;
  letter-spacing: -.022em;
  margin-bottom: 24px;
}

.hero h1 .grad {
  background: linear-gradient(115deg, var(--brand) 0%, var(--brand-2) 48%, var(--brand-3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 18px;
  line-height: 1.85;
  max-width: 640px;
  margin-bottom: 34px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: 56px;
  margin-top: 62px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}

.hero-stats .item .k {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2px;
}

.hero-stats .item .v { font-size: 14px; color: var(--muted); }

/* ---------- 产品卡 ---------- */

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.pcard {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 38px 34px;
  display: flex;
  flex-direction: column;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.pcard:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: #d7dfec;
}

.pcard .icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.pcard .icon svg { width: 25px; height: 25px; }
.icon-note { background: linear-gradient(135deg, #2f6bff, #6d5cff); box-shadow: 0 5px 16px rgba(47, 107, 255, .28); }
.icon-studio { background: linear-gradient(135deg, #6d5cff, #00c2d4); box-shadow: 0 5px 16px rgba(109, 92, 255, .28); }

.pcard h3 { font-size: 23px; margin-bottom: 6px; }

.pcard .tagline {
  font-size: 14px;
  color: var(--brand);
  font-weight: 600;
  margin-bottom: 16px;
}

.pcard p.desc { margin-bottom: 22px; }

.pcard ul {
  list-style: none;
  padding: 0;
  margin: 0 0 26px;
}

.pcard ul li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  font-size: 15px;
}

.pcard ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-3));
}

.pcard .foot { margin-top: auto; }

.pcard .more {
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pcard .more::after {
  content: "→";
  transition: transform .18s ease;
}

.pcard:hover .more::after { transform: translateX(3px); }

/* ---------- 特性块 ---------- */

.fcard {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: box-shadow .2s ease, border-color .2s ease;
}

.fcard:hover { box-shadow: var(--shadow-sm); border-color: #d7dfec; }

.fcard .fi {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.fcard .fi svg { width: 20px; height: 20px; }
.fcard h4 { font-size: 17px; margin-bottom: 8px; }
.fcard p { font-size: 15px; }

/* ---------- 场景列表 ---------- */

.scene {
  display: flex;
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-2);
}

.scene:last-child { border-bottom: 0; }

.scene .num {
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: .08em;
  flex-shrink: 0;
  width: 42px;
  padding-top: 3px;
}

.scene h4 { font-size: 17px; margin-bottom: 6px; }
.scene p { font-size: 15px; }

/* ---------- 深色 CTA ---------- */

.cta {
  background:
    radial-gradient(800px 400px at 20% 0%, rgba(47, 107, 255, .3), transparent 60%),
    radial-gradient(700px 380px at 85% 100%, rgba(0, 194, 212, .22), transparent 62%),
    var(--bg-deep);
  color: #fff;
  padding: 84px 0;
}

.cta h2 { color: #fff; font-size: 32px; margin-bottom: 16px; }

.cta p {
  color: rgba(255, 255, 255, .74);
  font-size: 17px;
  max-width: 620px;
  margin: 0 auto 32px;
}

.cta .center { text-align: center; }

.cta .btn-ghost {
  background: rgba(255, 255, 255, .09);
  border-color: rgba(255, 255, 255, .22);
  color: #fff;
}

.cta .btn-ghost:hover { background: rgba(255, 255, 255, .16); }

/* ---------- 关于页 ---------- */

.prose { max-width: 760px; }
.prose p { margin-bottom: 20px; font-size: 16.5px; }
.prose h3 { font-size: 21px; margin: 40px 0 14px; }

.valuegrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.value {
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.value .vn {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--brand);
  margin-bottom: 12px;
}

.value h4 { font-size: 18px; margin-bottom: 8px; }
.value p { font-size: 15px; }

.infolist { border-top: 1px solid var(--line); margin-top: 8px; }

.infolist .row {
  display: flex;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15.5px;
}

.infolist .row dt {
  width: 148px;
  flex-shrink: 0;
  color: var(--muted);
  margin: 0;
}

.infolist .row dd { margin: 0; color: var(--ink); font-weight: 500; }

/* ---------- 产品页首屏 ---------- */

.phero {
  padding: 84px 0 72px;
  border-bottom: 1px solid var(--line-2);
  background:
    radial-gradient(760px 400px at 8% 0%, rgba(47, 107, 255, .09), transparent 60%),
    radial-gradient(640px 360px at 95% 10%, rgba(0, 194, 212, .09), transparent 60%),
    #fbfcfe;
}

.phero .kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.phero .kicker .ic {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.phero .kicker .ic svg { width: 21px; height: 21px; }
.phero .kicker .nm { font-size: 20px; font-weight: 700; color: var(--ink); }
.phero h1 { font-size: 40px; line-height: 1.28; margin-bottom: 20px; max-width: 780px; }
.phero p.lead { font-size: 18px; max-width: 680px; }

/* ---------- 页脚 ---------- */

.site-footer {
  background: #fff;
  border-top: 1px solid var(--line);
  padding: 56px 0 34px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line-2);
}

.footer-brand { max-width: 330px; }
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p { font-size: 14.5px; color: var(--muted); line-height: 1.8; }

.footer-cols { display: flex; gap: 68px; flex-wrap: wrap; }
.footer-col h5 {
  font-size: 14px;
  color: var(--ink);
  margin: 0 0 14px;
  font-weight: 600;
}

.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }

.footer-col a, .footer-col span {
  font-size: 14.5px;
  color: var(--muted);
  transition: color .16s ease;
}

.footer-col a:hover { color: var(--brand); }

.footer-bottom {
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--muted);
}

.footer-bottom a { color: var(--muted); }
.footer-bottom a:hover { color: var(--brand); text-decoration: underline; }
.beian { display: flex; gap: 18px; flex-wrap: wrap; }

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4, .valuegrid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 40px; }
  .phero h1 { font-size: 32px; }
  .section-head h2 { font-size: 28px; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 16px 16px;
    box-shadow: var(--shadow-sm);
    display: none;
  }

  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 10px; border-radius: 8px; }

  .section { padding: 62px 0; }
  .hero { padding: 66px 0 62px; }
  .hero h1 { font-size: 31px; }
  .hero-sub { font-size: 16.5px; }
  .hero-stats { gap: 28px 40px; margin-top: 44px; }
  .phero { padding: 56px 0 50px; }
  .phero h1 { font-size: 27px; }
  .phero p.lead { font-size: 16.5px; }
  .section-head { margin-bottom: 36px; }
  .section-head h2 { font-size: 25px; }

  .grid-2, .grid-3, .grid-4, .valuegrid { grid-template-columns: 1fr; gap: 18px; }
  .pcard { padding: 30px 24px; }
  .cta { padding: 62px 0; }
  .cta h2 { font-size: 25px; }

  .footer-top { gap: 34px; }
  .footer-cols { gap: 40px; }
  .infolist .row { flex-direction: column; gap: 4px; }
  .infolist .row dt { width: auto; }
  .btn { width: 100%; }
  .hero-actions { width: 100%; }
}