/* ============================================================
   飞链数字官网 — 全站样式
   视觉系统：深空黑基底 #05060b + 电光紫 #8b5cf6 / 科技蓝 #5b8cff
   ============================================================ */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  padding: 0;
  background: #05060b;
}

body {
  color: #eceef8;
  font-family: 'Noto Sans SC', 'PingFang SC', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

::selection { background: rgba(139, 92, 246, .45); color: #fff; }

a { -webkit-tap-highlight-color: transparent; }

.mono { font-family: 'JetBrains Mono', monospace; }

.wrap { max-width: 1200px; margin: 0 auto; }

/* ---------- 关键帧 ---------- */
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes scrollHint { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(14px); opacity: 0; } 100% { transform: translateY(0); opacity: 0; } }
@keyframes spinSlow { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes pulseGlow { 0%, 100% { opacity: .5; } 50% { opacity: 1; } }
@keyframes cardIn { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }
@keyframes popIn { from { opacity: 0; transform: scale(.92); } to { opacity: 1; transform: scale(1); } }

/* ============================================================
   导航
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(5, 6, 11, .65);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  background: linear-gradient(135deg, #8b5cf6, #5b8cff);
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
  box-shadow: 0 0 18px rgba(139, 92, 246, .5);
}

.brand-name { font-size: 17px; font-weight: 700; color: #eceef8; letter-spacing: .5px; }

.brand-domain {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: #646c80;
  letter-spacing: 2px;
  margin-top: 3px;
}

.nav-links { display: flex; align-items: center; gap: 34px; }

.nav-link {
  color: #9aa2b8;
  text-decoration: none;
  font-size: 14.5px;
  transition: color .2s;
}

.nav-link:hover { color: #eceef8; }

.nav-link.active {
  color: #a78bfa;
  font-weight: 700;
  text-shadow: 0 0 16px rgba(167, 139, 250, .6);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, #8b5cf6, #6d6df6);
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 0 24px rgba(139, 92, 246, .45);
  border: 1px solid rgba(255, 255, 255, .18);
  transition: transform .2s, box-shadow .2s;
}

.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 0 36px rgba(139, 92, 246, .7); }

.nav-cta .arrow, .btn-primary .arrow, .link-pill .arrow { font-family: 'JetBrains Mono', monospace; }

/* ============================================================
   通用按钮 / 链接
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 38px;
  border-radius: 14px;
  background: linear-gradient(135deg, #8b5cf6, #6d6df6);
  color: #fff;
  text-decoration: none;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 1px;
  border: 1px solid rgba(255, 255, 255, .2);
  box-shadow: 0 0 40px rgba(139, 92, 246, .5), inset 0 1px 0 rgba(255, 255, 255, .25);
  transition: transform .2s, box-shadow .2s;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 60px rgba(139, 92, 246, .8), inset 0 1px 0 rgba(255, 255, 255, .25);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 38px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .04);
  color: #eceef8;
  text-decoration: none;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 1px;
  border: 1px solid rgba(255, 255, 255, .14);
  backdrop-filter: blur(8px);
  transition: transform .2s, border-color .2s, background .2s;
}

.btn-ghost:hover {
  transform: translateY(-3px);
  border-color: rgba(167, 139, 250, .6);
  background: rgba(139, 92, 246, .1);
}

.link-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #a78bfa;
  text-decoration: none;
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 12px 28px;
  border-radius: 999px;
  border: 1px solid rgba(139, 92, 246, .35);
  transition: background .2s, box-shadow .2s;
}

.link-pill:hover { background: rgba(139, 92, 246, .1); box-shadow: 0 0 30px rgba(139, 92, 246, .25); }

.link-pill.sm { font-size: 15px; padding: 11px 24px; }

/* ============================================================
   徽章（章节标签）
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid rgba(139, 92, 246, .35);
  background: rgba(139, 92, 246, .08);
  margin-bottom: 26px;
}

.badge .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #a78bfa;
  box-shadow: 0 0 10px #a78bfa;
  animation: pulseGlow 2s ease-in-out infinite;
}

.badge .label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: #c9b8fc;
  letter-spacing: 4px;
  white-space: nowrap;
}

.badge.blue { border-color: rgba(91, 140, 255, .35); background: rgba(91, 140, 255, .08); }
.badge.blue .dot { background: #8fb0ff; box-shadow: 0 0 10px #8fb0ff; }
.badge.blue .label { color: #b7c9ff; }

.kicker {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: #a78bfa;
  letter-spacing: 4px;
}

.kicker.blue { color: #5b8cff; }

/* ============================================================
   首页 Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 28px 80px;
  overflow: hidden;
}

.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

.hero-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 38%, rgba(139, 92, 246, .14), transparent 70%);
  pointer-events: none;
}

.hero-orbit {
  position: absolute;
  left: 50%; top: 30%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-orbit.inner {
  width: 560px; height: 560px;
  border: 1px dashed rgba(139, 92, 246, .12);
  animation: spinSlow 90s linear infinite;
}

.hero-orbit.outer {
  width: 820px; height: 820px;
  border: 1px dashed rgba(91, 140, 255, .08);
  animation: spinSlow 140s linear infinite reverse;
}

.hero-content { position: relative; z-index: 2; max-width: 1000px; pointer-events: none; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(139, 92, 246, .35);
  background: rgba(139, 92, 246, .08);
  backdrop-filter: blur(8px);
  margin-bottom: 34px;
}

.hero-badge .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #a78bfa;
  box-shadow: 0 0 10px #a78bfa;
  animation: pulseGlow 2s ease-in-out infinite;
}

.hero-badge .label { font-size: 13.5px; color: #c9b8fc; letter-spacing: 3px; white-space: nowrap; }

.hero-title {
  margin: 0;
  font-size: 84px;
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: 2px;
  text-wrap: balance;
}

.hero-title .line-plain { display: block; color: #eceef8; }

.hero-title .line-grad {
  display: block;
  background: linear-gradient(95deg, #a78bfa 10%, #5b8cff 55%, #c45bff 95%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 28px rgba(139, 92, 246, .35));
}

.hero-sub {
  margin: 34px 0 0;
  font-size: 21px;
  color: #9aa2b8;
  font-weight: 400;
  letter-spacing: 1px;
}

.hero-sub .typed {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: #a78bfa;
  text-shadow: 0 0 18px rgba(167, 139, 250, .5);
}

.hero-sub .cursor {
  display: inline-block;
  width: 2px; height: 22px;
  background: #a78bfa;
  vertical-align: -3px;
  margin: 0 2px;
  animation: blink 1s step-end infinite;
  box-shadow: 0 0 10px #a78bfa;
}

.hero-ctas { display: flex; gap: 18px; justify-content: center; margin-top: 48px; pointer-events: auto; }

.scroll-hint {
  position: absolute;
  bottom: 34px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.scroll-hint .text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 3px;
  color: #646c80;
}

.scroll-hint .mouse {
  width: 22px; height: 36px;
  border: 1.5px solid rgba(255, 255, 255, .18);
  border-radius: 11px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.scroll-hint .wheel {
  width: 3px; height: 7px;
  border-radius: 2px;
  background: #a78bfa;
  animation: scrollHint 1.8s ease-in-out infinite;
}

/* ============================================================
   首页统计条
   ============================================================ */
.stats {
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, .06);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
  background: linear-gradient(180deg, rgba(139, 92, 246, .05), transparent);
}

.stats-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 28px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  border-right: 1px solid rgba(255, 255, 255, .07);
}

.stat:last-child { border-right: none; }

.stat .num {
  font-family: 'Space Grotesk', monospace;
  font-size: 52px;
  font-weight: 700;
  color: #eceef8;
}

.stat .num .plus { color: #a78bfa; }

.stat .desc { font-size: 14px; color: #9aa2b8; letter-spacing: 2px; }

/* ============================================================
   通用区块
   ============================================================ */
.section { position: relative; padding: 130px 28px; }

.section.grid-bg {
  background-image: linear-gradient(rgba(255, 255, 255, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .025) 1px, transparent 1px);
  background-size: 56px 56px;
}

.section.glow-top { background: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(91, 140, 255, .07), transparent 60%); }

.section-head { display: flex; flex-direction: column; gap: 14px; margin-bottom: 64px; }

.section-head h2 { margin: 0; font-size: 48px; font-weight: 900; color: #eceef8; letter-spacing: 1px; }

.section-head p { margin: 0; font-size: 17px; color: #9aa2b8; }

.section-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 64px;
}

/* ============================================================
   首页服务卡片
   ============================================================ */
.svc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.svc-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 34px 26px;
  border-radius: 18px;
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .08);
  text-decoration: none;
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.svc-card:hover {
  transform: translateY(-8px);
  border-color: rgba(139, 92, 246, .55);
  box-shadow: 0 24px 70px rgba(139, 92, 246, .22), inset 0 1px 0 rgba(255, 255, 255, .08);
}

.svc-card .topline {
  position: absolute;
  top: 0; left: 24px; right: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--hue), transparent);
  opacity: .8;
}

.svc-card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px; height: 54px;
  border-radius: 14px;
  font-size: 24px;
  color: var(--hue);
  background: rgba(139, 92, 246, .08);
  border: 1px solid rgba(139, 92, 246, .25);
  text-shadow: 0 0 18px var(--hue);
}

.svc-card .title { font-size: 20px; font-weight: 700; color: #eceef8; }

.svc-card .desc { font-size: 14.5px; color: #9aa2b8; line-height: 1.7; }

.svc-card .code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: #646c80;
  letter-spacing: 2px;
}

.center-link { display: flex; justify-content: center; margin-top: 52px; }

/* ============================================================
   案例卡片（首页预览 + 案例页）
   ============================================================ */
.case-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }

.case-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: 18px;
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .08);
  text-decoration: none;
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.case-card:hover {
  transform: translateY(-8px);
  border-color: rgba(139, 92, 246, .5);
  box-shadow: 0 24px 70px rgba(91, 140, 255, .18);
}

.case-cover {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 150px;
  background: linear-gradient(140deg, var(--bg1), var(--bg2));
  position: relative;
  overflow: hidden;
}

.case-cover .grid-lines {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .06) 1px, transparent 1px);
  background-size: 26px 26px;
}

.case-cover .glyph {
  font-size: 46px;
  color: rgba(255, 255, 255, .9);
  text-shadow: 0 0 36px var(--hue);
  position: relative;
}

.case-cover .tag {
  position: absolute;
  top: 14px; right: 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, .85);
  background: rgba(5, 6, 11, .45);
  border: 1px solid rgba(255, 255, 255, .18);
  padding: 4px 10px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}

.case-body { display: flex; flex-direction: column; gap: 10px; padding: 24px 24px 26px; }

.case-body .title { font-size: 19px; font-weight: 700; color: #eceef8; }

.case-body .desc { font-size: 14px; color: #9aa2b8; line-height: 1.7; }

.tech-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }

.tech-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: #a78bfa;
  background: rgba(139, 92, 246, .1);
  border: 1px solid rgba(139, 92, 246, .25);
  padding: 4px 10px;
  border-radius: 6px;
}

/* ============================================================
   技术栈跑马灯
   ============================================================ */
.marquee {
  position: relative;
  padding: 50px 0;
  border-top: 1px solid rgba(255, 255, 255, .06);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
  overflow: hidden;
  background: rgba(139, 92, 246, .03);
}

.marquee .fade {
  position: absolute;
  top: 0; bottom: 0;
  width: 160px;
  z-index: 2;
  pointer-events: none;
}

.marquee .fade.left { left: 0; background: linear-gradient(90deg, #05060b, transparent); }
.marquee .fade.right { right: 0; background: linear-gradient(-90deg, #05060b, transparent); }

.marquee-track {
  display: flex;
  gap: 56px;
  width: max-content;
  animation: marquee 30s linear infinite;
}

.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: 'Space Grotesk', monospace;
  font-size: 26px;
  font-weight: 500;
  color: #646c80;
  letter-spacing: 1px;
  white-space: nowrap;
}

.marquee-item .diamond { color: #8b5cf6; font-size: 12px; }

/* ============================================================
   关于（首页预览 + 关于页）轨道视觉
   ============================================================ */
.about-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-copy { display: flex; flex-direction: column; gap: 22px; }

.about-copy h2 { margin: 0; font-size: 48px; font-weight: 900; color: #eceef8; letter-spacing: 1px; }

.about-copy p { margin: 0; font-size: 17px; color: #9aa2b8; line-height: 2; text-wrap: pretty; }

.about-copy .em { color: #c9b8fc; }

.about-copy .belief {
  font-size: 18px;
  color: #eceef8;
  font-weight: 700;
  border-left: 2px solid #8b5cf6;
  padding-left: 18px;
}

.orbit-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
}

.orbit-visual .ring-1 {
  position: absolute;
  width: 320px; height: 320px;
  border: 1px dashed rgba(139, 92, 246, .25);
  border-radius: 50%;
  animation: spinSlow 60s linear infinite;
}

.orbit-visual .ring-2 {
  position: absolute;
  width: 230px; height: 230px;
  border: 1px dashed rgba(91, 140, 255, .25);
  border-radius: 50%;
  animation: spinSlow 40s linear infinite reverse;
}

.orbit-visual .halo {
  position: absolute;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, .18), transparent 65%);
}

.orbit-visual .core {
  position: relative;
  width: 130px; height: 130px;
  border-radius: 32px;
  background: linear-gradient(135deg, #8b5cf6, #5b8cff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 56px;
  color: #fff;
  box-shadow: 0 0 80px rgba(139, 92, 246, .6), inset 0 2px 0 rgba(255, 255, 255, .3);
  animation: floaty 5s ease-in-out infinite;
}

.orbit-chip {
  position: absolute;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  padding: 6px 12px;
  border-radius: 8px;
  backdrop-filter: blur(6px);
}

.orbit-chip.purple { color: #a78bfa; background: rgba(139, 92, 246, .1); border: 1px solid rgba(139, 92, 246, .3); animation: floaty 6s ease-in-out infinite; }
.orbit-chip.blue { color: #8fb0ff; background: rgba(91, 140, 255, .1); border: 1px solid rgba(91, 140, 255, .3); animation: floaty 7s ease-in-out infinite reverse; }
.orbit-chip.magenta { color: #de9bff; background: rgba(196, 91, 255, .1); border: 1px solid rgba(196, 91, 255, .3); animation: floaty 5.5s ease-in-out infinite; }

/* ============================================================
   CTA 横幅
   ============================================================ */
.cta-section { position: relative; padding: 110px 28px; overflow: hidden; }

.cta-section.tail { padding: 0 28px 110px; }

.cta-banner {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  border-radius: 28px;
  border: 1px solid rgba(139, 92, 246, .35);
  background: linear-gradient(135deg, rgba(139, 92, 246, .14), rgba(91, 140, 255, .08));
  padding: 90px 60px;
  text-align: center;
  overflow: hidden;
  box-shadow: 0 0 90px rgba(139, 92, 246, .12) inset;
}

.cta-banner.compact { padding: 70px 60px; box-shadow: none; }

.cta-banner .grid-lines {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.cta-banner .glow {
  position: absolute;
  top: -120px; left: 50%;
  transform: translateX(-50%);
  width: 480px; height: 240px;
  background: radial-gradient(ellipse, rgba(167, 139, 250, .35), transparent 70%);
  pointer-events: none;
}

.cta-banner h2 { position: relative; margin: 0; font-size: 46px; font-weight: 900; color: #eceef8; letter-spacing: 1px; }

.cta-banner.compact h2 { font-size: 38px; }

.cta-banner p { position: relative; margin: 22px 0 0; font-size: 17px; color: #9aa2b8; }

.cta-banner.compact p { margin-top: 18px; font-size: 16.5px; }

.cta-banner .actions { position: relative; display: flex; justify-content: center; gap: 18px; margin-top: 44px; }

.cta-banner.compact .actions { margin-top: 36px; }

.cta-banner .btn-primary { padding: 16px 42px; box-shadow: 0 0 44px rgba(139, 92, 246, .55); }

.cta-banner .btn-primary:hover { box-shadow: 0 0 70px rgba(139, 92, 246, .85); }

.cta-banner.compact .btn-primary { padding: 15px 40px; font-size: 16.5px; }

/* ============================================================
   页脚
   ============================================================ */
.footer {
  border-top: 1px solid rgba(255, 255, 255, .06);
  background: #04050a;
  padding: 70px 28px 36px;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr;
  gap: 60px;
}

.footer-brand { display: flex; flex-direction: column; gap: 16px; }

.footer-brand .row { display: flex; align-items: center; gap: 10px; }

.footer-brand .logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  background: linear-gradient(135deg, #8b5cf6, #5b8cff);
  border-radius: 7px;
  color: #fff;
  font-size: 13px;
}

.footer-brand .name { font-size: 16px; font-weight: 700; color: #eceef8; }

.footer-brand .blurb { margin: 0; font-size: 13.5px; color: #646c80; line-height: 1.9; max-width: 360px; }

.footer-col { display: flex; flex-direction: column; gap: 14px; }

.footer-col .head {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: #646c80;
  letter-spacing: 3px;
}

.footer-col a { color: #9aa2b8; text-decoration: none; font-size: 14px; transition: color .2s; }

.footer-col a:hover { color: #a78bfa; }

.footer-col .info { color: #9aa2b8; font-size: 14px; }

.footer-col .info.addr { line-height: 1.7; }

.footer-col .info .val { font-family: 'JetBrains Mono', monospace; color: #c9b8fc; }

.footer-bottom {
  max-width: 1200px;
  margin: 50px auto 0;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, .05);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom .copyright { font-size: 12.5px; color: #646c80; }

.footer-bottom .icp { font-size: 12.5px; color: #646c80; text-decoration: none; transition: color .2s; }

.footer-bottom .icp:hover { color: #9aa2b8; }

/* ============================================================
   内页 Hero
   ============================================================ */
.page-hero {
  position: relative;
  padding: 190px 28px 90px;
  text-align: center;
  overflow: hidden;
  background: radial-gradient(ellipse 60% 70% at 50% 0%, rgba(139, 92, 246, .13), transparent 65%);
}

.page-hero.blue { background: radial-gradient(ellipse 60% 70% at 50% 0%, rgba(91, 140, 255, .12), transparent 65%); }

.page-hero.short { padding-bottom: 70px; }

.page-hero.grid-bg {
  background-image:
    radial-gradient(ellipse 60% 70% at 50% 0%, rgba(139, 92, 246, .13), transparent 65%),
    linear-gradient(rgba(255, 255, 255, .02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .02) 1px, transparent 1px);
  background-size: auto, 56px 56px, 56px 56px;
}

.page-hero h1 { margin: 0; font-size: 64px; font-weight: 900; letter-spacing: 2px; color: #eceef8; }

.page-hero h1 .grad {
  background: linear-gradient(95deg, #a78bfa, #5b8cff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-hero .lead { margin: 24px auto 0; max-width: 620px; font-size: 18px; color: #9aa2b8; line-height: 1.9; }

.page-hero .lead.wide { max-width: 680px; }

/* ============================================================
   服务页 — 服务详情块
   ============================================================ */
.svc-blocks {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.svc-block {
  position: relative;
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 50px;
  padding: 50px;
  border-radius: 22px;
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .08);
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: border-color .25s, box-shadow .25s;
}

.svc-block:hover { border-color: rgba(139, 92, 246, .45); box-shadow: 0 24px 80px rgba(139, 92, 246, .14); }

.svc-block .topline {
  position: absolute;
  top: 0; left: 50px; right: 50px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--hue), transparent);
  opacity: .7;
}

.svc-block-intro { display: flex; flex-direction: column; gap: 20px; }

.svc-block-intro .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px; height: 64px;
  border-radius: 16px;
  font-size: 28px;
  color: var(--hue);
  background: rgba(139, 92, 246, .08);
  border: 1px solid rgba(139, 92, 246, .28);
  text-shadow: 0 0 22px var(--hue);
}

.svc-block-intro .code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: #646c80;
  letter-spacing: 3px;
}

.svc-block-intro .title { font-size: 30px; font-weight: 900; color: #eceef8; letter-spacing: 1px; }

.svc-block-intro .desc { font-size: 15.5px; color: #9aa2b8; line-height: 1.9; text-wrap: pretty; }

.svc-block-intro .tech-tags { margin-top: 4px; }

.svc-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-content: center;
}

.svc-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 24px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .025);
  border: 1px solid rgba(255, 255, 255, .07);
  transition: border-color .2s, background .2s;
}

.svc-item:hover { border-color: rgba(139, 92, 246, .4); background: rgba(139, 92, 246, .06); }

.svc-item .idx {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--hue);
  letter-spacing: 2px;
}

.svc-item .name { font-size: 16.5px; font-weight: 700; color: #eceef8; }

.svc-item .note { font-size: 13.5px; color: #9aa2b8; line-height: 1.7; }

/* ============================================================
   服务页 — 交付流程
   ============================================================ */
.process-section {
  position: relative;
  padding: 110px 28px 130px;
  border-top: 1px solid rgba(255, 255, 255, .06);
  background: radial-gradient(ellipse 70% 60% at 50% 100%, rgba(91, 140, 255, .06), transparent 60%);
}

.process-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 70px;
  text-align: center;
  align-items: center;
}

.process-head h2 { margin: 0; font-size: 44px; font-weight: 900; color: #eceef8; letter-spacing: 1px; }

.process-head p { margin: 0; font-size: 16.5px; color: #9aa2b8; }

.process-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.process-line {
  position: absolute;
  top: 27px; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(139, 92, 246, .5), rgba(91, 140, 255, .5), transparent);
}

.process-step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.process-step .n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px; height: 54px;
  border-radius: 50%;
  background: #0a0c16;
  border: 1px solid rgba(139, 92, 246, .45);
  font-family: 'Space Grotesk', monospace;
  font-size: 18px;
  font-weight: 700;
  color: #a78bfa;
  box-shadow: 0 0 26px rgba(139, 92, 246, .35);
}

.process-step .name { font-size: 18px; font-weight: 700; color: #eceef8; }

.process-step .note { font-size: 13.5px; color: #9aa2b8; line-height: 1.7; max-width: 180px; }

/* ============================================================
   案例页 — 筛选 + 大卡片
   ============================================================ */
.filter-bar {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-btn {
  cursor: pointer;
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 14.5px;
  font-weight: 400;
  color: #9aa2b8;
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .1);
  padding: 10px 26px;
  border-radius: 999px;
  letter-spacing: 1px;
  box-shadow: none;
  transition: all .25s;
}

.filter-btn:hover { border-color: rgba(167, 139, 250, .6); color: #eceef8; }

.filter-btn.active {
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #8b5cf6, #6d6df6);
  border-color: rgba(255, 255, 255, .25);
  box-shadow: 0 0 28px rgba(139, 92, 246, .5);
}

.filter-btn .count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  margin-left: 8px;
  opacity: .65;
}

.case-grid-2 {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.case-lg {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: 20px;
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .08);
  overflow: hidden;
  backdrop-filter: blur(10px);
  animation: cardIn .55s cubic-bezier(.22, 1, .36, 1) both;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.case-lg:hover {
  transform: translateY(-7px);
  border-color: rgba(139, 92, 246, .5);
  box-shadow: 0 26px 80px rgba(139, 92, 246, .18);
}

.case-lg.hidden { display: none; }

.case-lg .cover {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 190px;
  background: linear-gradient(140deg, var(--bg1), var(--bg2));
  position: relative;
  overflow: hidden;
}

.case-lg .cover .grid-lines {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .06) 1px, transparent 1px);
  background-size: 28px 28px;
}

.case-lg .cover .glyph {
  font-size: 58px;
  color: rgba(255, 255, 255, .92);
  text-shadow: 0 0 44px var(--hue);
  position: relative;
}

.case-lg .cover .code {
  position: absolute;
  top: 16px; left: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, .6);
}

.case-lg .cover .tag {
  position: absolute;
  top: 14px; right: 14px;
  font-size: 12px;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, .9);
  background: rgba(5, 6, 11, .5);
  border: 1px solid rgba(255, 255, 255, .2);
  padding: 5px 13px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}

.case-lg .body { display: flex; flex-direction: column; gap: 12px; padding: 28px 30px 30px; }

.case-lg .body .title { font-size: 23px; font-weight: 900; color: #eceef8; letter-spacing: .5px; }

.case-lg .body .desc { font-size: 14.5px; color: #9aa2b8; line-height: 1.85; text-wrap: pretty; }

.case-points { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }

.case-points .point {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13.5px;
  color: #b7bdcf;
}

.case-points .point .diamond { color: var(--hue); font-size: 10px; }

.case-lg .tech-tags {
  margin-top: 10px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, .06);
}

.case-lg .tech-tag { padding: 4px 11px; }

/* ============================================================
   关于页
   ============================================================ */
.intro-section { padding: 30px 28px 100px; }

.intro-copy { display: flex; flex-direction: column; gap: 24px; }

.intro-copy h2 { margin: 0; font-size: 36px; font-weight: 900; color: #eceef8; letter-spacing: 1px; }

.intro-copy p { margin: 0; font-size: 16.5px; color: #9aa2b8; line-height: 2; text-wrap: pretty; }

.field-chips { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 6px; }

.field-chip { font-size: 13.5px; padding: 8px 18px; border-radius: 999px; }

.field-chip.purple { color: #a78bfa; background: rgba(139, 92, 246, .1); border: 1px solid rgba(139, 92, 246, .28); }
.field-chip.blue { color: #8fb0ff; background: rgba(91, 140, 255, .1); border: 1px solid rgba(91, 140, 255, .28); }
.field-chip.magenta { color: #de9bff; background: rgba(196, 91, 255, .1); border: 1px solid rgba(196, 91, 255, .28); }
.field-chip.indigo { color: #9b9bfa; background: rgba(109, 109, 246, .1); border: 1px solid rgba(109, 109, 246, .28); }

.orbit-visual.lg { min-height: 380px; }

.orbit-visual.lg .ring-1 { width: 340px; height: 340px; }
.orbit-visual.lg .ring-2 { width: 240px; height: 240px; }
.orbit-visual.lg .halo { width: 340px; height: 340px; }

.orbit-visual.lg .core {
  width: 140px; height: 140px;
  border-radius: 34px;
  font-size: 60px;
  box-shadow: 0 0 90px rgba(139, 92, 246, .6), inset 0 2px 0 rgba(255, 255, 255, .3);
}

.values-section {
  position: relative;
  padding: 110px 28px;
  border-top: 1px solid rgba(255, 255, 255, .06);
  background-image: linear-gradient(rgba(255, 255, 255, .02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .02) 1px, transparent 1px);
  background-size: 56px 56px;
}

.values-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 60px;
  text-align: center;
  align-items: center;
}

.values-head h2 { margin: 0; font-size: 44px; font-weight: 900; color: #eceef8; letter-spacing: 1px; }

.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }

.value-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 40px 34px;
  border-radius: 20px;
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .08);
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.value-card:hover {
  transform: translateY(-6px);
  border-color: rgba(139, 92, 246, .5);
  box-shadow: 0 24px 70px rgba(139, 92, 246, .18);
}

.value-card .topline {
  position: absolute;
  top: 0; left: 28px; right: 28px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--hue), transparent);
  opacity: .8;
}

.value-card .n {
  font-family: 'Space Grotesk', monospace;
  font-size: 40px;
  font-weight: 700;
  color: var(--hue);
  opacity: .9;
  text-shadow: 0 0 26px var(--hue);
}

.value-card .title { font-size: 21px; font-weight: 700; color: #eceef8; }

.value-card .desc { font-size: 14.5px; color: #9aa2b8; line-height: 1.9; text-wrap: pretty; }

.info-section { padding: 110px 28px; }

.info-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.info-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 34px;
  border-radius: 18px;
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .08);
}

.info-card .head {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: #646c80;
  letter-spacing: 3px;
}

.info-card .title { font-size: 18px; font-weight: 700; color: #eceef8; }

.info-card .note { font-size: 14px; color: #9aa2b8; line-height: 1.7; }

/* ============================================================
   联系页
   ============================================================ */
.contact-cards-section { padding: 20px 28px 60px; }

.contact-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 38px 34px;
  border-radius: 20px;
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .08);
  text-decoration: none;
  backdrop-filter: blur(10px);
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.contact-card:hover { transform: translateY(-6px); }

.contact-card.purple:hover { border-color: rgba(139, 92, 246, .5); box-shadow: 0 24px 70px rgba(139, 92, 246, .18); }
.contact-card.blue:hover { border-color: rgba(91, 140, 255, .5); box-shadow: 0 24px 70px rgba(91, 140, 255, .18); }
.contact-card.magenta:hover { border-color: rgba(196, 91, 255, .5); box-shadow: 0 24px 70px rgba(196, 91, 255, .15); }

.contact-card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px; height: 50px;
  border-radius: 14px;
  font-size: 22px;
}

.contact-card.purple .icon { color: #a78bfa; background: rgba(139, 92, 246, .08); border: 1px solid rgba(139, 92, 246, .28); }
.contact-card.blue .icon { color: #8fb0ff; background: rgba(91, 140, 255, .08); border: 1px solid rgba(91, 140, 255, .28); }
.contact-card.magenta .icon { color: #de9bff; background: rgba(196, 91, 255, .08); border: 1px solid rgba(196, 91, 255, .28); }

.contact-card .head {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: #646c80;
  letter-spacing: 3px;
}

.contact-card .value {
  font-family: 'Space Grotesk', monospace;
  font-size: 24px;
  font-weight: 700;
  color: #eceef8;
}

.contact-card .value.addr {
  font-family: 'Noto Sans SC', 'PingFang SC', sans-serif;
  font-size: 21px;
  line-height: 1.4;
}

.contact-card .note { font-size: 13.5px; color: #9aa2b8; }

/* ---------- 留言表单 ---------- */
.form-section { padding: 40px 28px 120px; }

.form-panel {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
  border-radius: 26px;
  border: 1px solid rgba(139, 92, 246, .3);
  background: linear-gradient(160deg, rgba(139, 92, 246, .09), rgba(91, 140, 255, .05));
  padding: 60px;
  overflow: hidden;
}

.form-panel .grid-lines {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, .03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.form-panel .glow {
  position: absolute;
  top: -100px; left: 50%;
  transform: translateX(-50%);
  width: 420px; height: 200px;
  background: radial-gradient(ellipse, rgba(167, 139, 250, .3), transparent 70%);
  pointer-events: none;
}

.contact-form { position: relative; display: flex; flex-direction: column; gap: 26px; }

.form-head { display: flex; flex-direction: column; gap: 10px; text-align: center; }

.form-head h2 { margin: 0; font-size: 32px; font-weight: 900; color: #eceef8; }

.form-head p { margin: 0; font-size: 15px; color: #9aa2b8; }

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

.form-field { display: flex; flex-direction: column; gap: 8px; }

.form-field label { font-size: 13.5px; color: #9aa2b8; letter-spacing: 1px; }

.form-field input,
.form-field textarea {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 15px;
  color: #eceef8;
  background: rgba(5, 6, 11, .55);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 12px;
  padding: 14px 18px;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}

.form-field input[type="tel"] { font-family: 'JetBrains Mono', monospace; }

.form-field textarea { resize: vertical; line-height: 1.8; }

.form-field input:focus,
.form-field textarea:focus {
  border-color: rgba(167, 139, 250, .7);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, .15);
}

.form-field input.invalid,
.form-field textarea.invalid { border-color: rgba(255, 90, 90, .55); }

input::placeholder, textarea::placeholder { color: #5a627a; }

.form-error {
  font-size: 13.5px;
  color: #ff9b9b;
  background: rgba(255, 80, 80, .08);
  border: 1px solid rgba(255, 80, 80, .3);
  border-radius: 10px;
  padding: 12px 18px;
}

.form-error.hidden { display: none; }

.form-submit {
  cursor: pointer;
  font-family: 'Noto Sans SC', sans-serif;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px;
  border-radius: 14px;
  background: linear-gradient(135deg, #8b5cf6, #6d6df6);
  color: #fff;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 2px;
  border: 1px solid rgba(255, 255, 255, .2);
  box-shadow: 0 0 40px rgba(139, 92, 246, .5);
  transition: transform .2s, box-shadow .2s;
}

.form-submit:hover { transform: translateY(-2px); box-shadow: 0 0 60px rgba(139, 92, 246, .8); }

.form-submit .arrow { font-family: 'JetBrains Mono', monospace; }

.form-success {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  text-align: center;
  padding: 30px 0;
  animation: popIn .5s cubic-bezier(.22, 1, .36, 1) both;
}

.form-success.hidden { display: none; }

.form-success .check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 84px; height: 84px;
  border-radius: 50%;
  font-size: 36px;
  color: #fff;
  background: linear-gradient(135deg, #8b5cf6, #5b8cff);
  box-shadow: 0 0 60px rgba(139, 92, 246, .6);
}

.form-success h2 { margin: 10px 0 0; font-size: 30px; font-weight: 900; color: #eceef8; }

.form-success p { margin: 0; font-size: 15.5px; color: #9aa2b8; line-height: 1.9; }

.form-success .phone { font-family: 'JetBrains Mono', monospace; color: #c9b8fc; }

.form-reset {
  cursor: pointer;
  font-family: 'Noto Sans SC', sans-serif;
  margin-top: 10px;
  padding: 11px 30px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .04);
  color: #9aa2b8;
  font-size: 14px;
  border: 1px solid rgba(255, 255, 255, .14);
  transition: color .2s, border-color .2s;
}

.form-reset:hover { color: #eceef8; border-color: rgba(167, 139, 250, .5); }

/* ============================================================
   响应式（设计稿为桌面端，以下为合理降级，≥1100px 不受影响）
   ============================================================ */
@media (max-width: 1100px) {
  .svc-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: none; }
  .process-grid { grid-template-columns: repeat(3, 1fr); gap: 40px 18px; }
  .process-line { display: none; }
  .svc-block { grid-template-columns: 1fr; gap: 34px; }
  .about-grid { grid-template-columns: 1fr; gap: 60px; }
  .values-grid, .info-grid, .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 860px) {
  .nav-links { gap: 18px; }
  .nav-link { font-size: 13.5px; }
  .nav-cta { display: none; }
  .brand-domain { display: none; }
  .hero-title { font-size: 52px; }
  .hero-sub { font-size: 17px; }
  .page-hero h1 { font-size: 44px; }
  .section { padding: 90px 20px; }
  .section-head h2, .cta-banner h2 { font-size: 34px; }
  .svc-grid, .case-grid-3, .case-grid-2, .stats-grid { grid-template-columns: 1fr; }
  .stat { border-right: none; }
  .svc-items { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .hero-ctas { flex-direction: column; align-items: center; }
  .cta-banner { padding: 56px 28px; }
  .form-panel { padding: 40px 24px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-bottom { justify-content: center; text-align: center; }
}