/* =========================================================
   星慕网络科技有限公司 — 官网样式
   设计语言：深色科技风 / 玻璃拟态 / 渐变光晕
   ========================================================= */

:root {
  /* —— 颜色 —— */
  --bg-base:        #060914;
  --bg-soft:        #0a0f1f;
  --bg-alt:         #0c1226;
  --surface:        #0f1525;
  --surface-2:      #131b30;
  --border:         #1f2a44;
  --border-subtle:  #182039;

  --text-1:         #f1f5f9;
  --text-2:         #94a3b8;
  --text-3:         #64748b;

  --c-cyan:         #22d3ee;
  --c-amber:        #fbbf24;
  --c-emerald:      #34d399;
  --c-violet:       #a78bfa;
  --c-rose:         #fb7185;

  --grad-primary:   linear-gradient(135deg, #22d3ee 0%, #818cf8 100%);
  --grad-accent:    linear-gradient(135deg, #22d3ee 0%, #fbbf24 100%);
  --grad-soft:      linear-gradient(180deg, rgba(34,211,238,0.08) 0%, rgba(34,211,238,0) 100%);

  /* —— 尺寸 —— */
  --container:      1280px;
  --radius-sm:      8px;
  --radius-md:      14px;
  --radius-lg:      22px;
  --radius-xl:      32px;

  /* —— 阴影 —— */
  --shadow-1:       0 1px 2px rgba(0,0,0,.4);
  --shadow-2:       0 12px 40px -12px rgba(34,211,238,.18), 0 0 0 1px rgba(34,211,238,.06);
  --shadow-3:       0 30px 80px -20px rgba(0,0,0,.5), 0 0 0 1px rgba(31,42,68,.6);

  /* —— 字体 —— */
  --font-display:   'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --font-body:      'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:      'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-1);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(34,211,238,.35); color: #fff; }

/* —— 容器 —— */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
@media (min-width: 768px) {
  .container { padding: 0 32px; }
}

/* —— 背景装饰 —— */
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(34,211,238,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34,211,238,.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 35%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 35%, transparent 75%);
}
.bg-glow {
  position: fixed;
  width: 720px;
  height: 720px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: .35;
}
.bg-glow--cyan   { background: #22d3ee; top: -200px; left: -160px; }
.bg-glow--amber  { background: #fbbf24; top: 30%;   right: -200px; opacity: .15; }
.bg-glow--violet { background: #818cf8; bottom: -200px; left: 30%; opacity: .2; }

/* —— 导航 —— */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 18px 0;
  transition: backdrop-filter .3s ease, background .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: rgba(6,9,20,.65);
  border-bottom-color: var(--border-subtle);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
}
.brand-mark {
  display: inline-flex;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 0 24px rgba(34,211,238,.25);
}
.brand-text { display: inline-flex; flex-direction: column; line-height: 1.15; }
.brand-text__cn { font-weight: 700; font-size: 16px; letter-spacing: .5px; }
.brand-text__en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-2);
  text-transform: uppercase;
}
.nav__links {
  display: none;
  gap: 28px;
  font-size: 14px;
  color: var(--text-2);
}
.nav__links a { position: relative; transition: color .2s ease; }
.nav__links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 1px;
  background: var(--c-cyan);
  transition: width .25s ease;
}
.nav__links a:hover { color: var(--text-1); }
.nav__links a:hover::after { width: 100%; }
.nav__cta {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  background: var(--c-cyan);
  color: #042b33;
  box-shadow: 0 8px 30px -8px rgba(34,211,238,.5);
  transition: transform .2s ease, box-shadow .2s ease;
}
.nav__cta:hover { transform: translateY(-1px); box-shadow: 0 12px 36px -8px rgba(34,211,238,.7); }
.nav__toggle {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 40px; height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav__toggle span {
  width: 16px; height: 1.5px; background: var(--text-1); transition: transform .2s ease, opacity .2s ease;
}
@media (min-width: 1024px) {
  .nav__links { display: inline-flex; }
  .nav__cta   { display: inline-flex; }
  .nav__toggle { display: none; }
}

/* —— Hero —— */
.hero {
  position: relative;
  z-index: 1;
  padding: 140px 0 80px;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}
@media (min-width: 1024px) {
  .hero { padding: 180px 0 120px; }
  .hero__grid { grid-template-columns: 1.2fr 1fr; gap: 72px; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--text-2);
  background: rgba(34,211,238,.06);
  border: 1px solid rgba(34,211,238,.18);
  border-radius: 100px;
  text-transform: uppercase;
}
.eyebrow__dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 12px var(--c-cyan);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .6; transform: scale(.85); }
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 24px 0 20px;
}
.hero__title--grad {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__sub {
  max-width: 56ch;
  color: var(--text-2);
  font-size: clamp(15px, 1.2vw, 18px);
  line-height: 1.7;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 100px;
  font-weight: 500;
  font-size: 15px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease, color .2s ease;
}
.btn--primary {
  background: var(--c-cyan);
  color: #042b33;
  box-shadow: 0 12px 40px -10px rgba(34,211,238,.55);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 48px -8px rgba(34,211,238,.75); }
.btn--ghost {
  background: transparent;
  color: var(--text-1);
  border-color: var(--border);
}
.btn--ghost:hover { border-color: var(--c-cyan); color: var(--c-cyan); }
.btn--block { width: 100%; justify-content: center; }

.hero__stats {
  list-style: none;
  margin: 56px 0 0;
  padding: 24px 0 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  border-top: 1px solid var(--border-subtle);
}
@media (min-width: 640px) { .hero__stats { grid-template-columns: repeat(4, 1fr); } }
.hero__stats li { display: flex; flex-direction: column; gap: 4px; }
.hero__stat-num {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.hero__stat-unit { font-size: 16px; color: var(--text-2); margin-left: 4px; }
.hero__stat-label { font-size: 13px; color: var(--text-3); margin-top: 6px; letter-spacing: .5px; }

/* —— Hero 视觉（轨道动画） —— */
.hero__visual {
  position: relative;
  height: 360px;
}
@media (min-width: 1024px) { .hero__visual { height: 480px; } }
.orbit {
  position: absolute; inset: 0;
  display: grid; place-items: center;
}
.orbit__core {
  position: relative;
  width: 120px; height: 120px;
  display: grid; place-items: center;
  border-radius: 32px;
  background: linear-gradient(180deg, rgba(34,211,238,.12), rgba(34,211,238,.02));
  border: 1px solid rgba(34,211,238,.35);
  box-shadow:
    inset 0 0 30px rgba(34,211,238,.18),
    0 0 80px -10px rgba(34,211,238,.4);
  backdrop-filter: blur(6px);
}
.orbit__ring {
  position: absolute;
  top: 50%; left: 50%;
  border-radius: 50%;
  border: 1px dashed rgba(148,163,184,.18);
  transform: translate(-50%, -50%);
  animation: spin linear infinite;
}
.orbit__ring--1 { width: 260px; height: 260px; animation-duration: 22s; }
.orbit__ring--2 { width: 380px; height: 380px; animation-duration: 36s; animation-direction: reverse; border-color: rgba(34,211,238,.12); }
.orbit__chip {
  position: absolute;
  top: 50%; left: 50%;
  width: 44px; height: 44px;
  margin: -22px;
  display: grid; place-items: center;
  color: var(--text-1);
  background: rgba(15,21,37,.85);
  border: 1px solid var(--border);
  border-radius: 14px;
  backdrop-filter: blur(6px);
  box-shadow: 0 6px 24px rgba(0,0,0,.4);
}
.orbit__chip--lg { width: 56px; height: 56px; margin: -28px; color: var(--c-cyan); border-color: rgba(34,211,238,.4); }
/* 在 6 个方向上分布子元素 */
.orbit__ring--1 .orbit__chip[data-pos="0"] { transform: rotate(0deg)   translateX(130px) rotate(0deg);   }
.orbit__ring--1 .orbit__chip[data-pos="2"] { transform: rotate(120deg) translateX(130px) rotate(-120deg);}
.orbit__ring--1 .orbit__chip[data-pos="4"] { transform: rotate(240deg) translateX(130px) rotate(-240deg);}
.orbit__ring--2 .orbit__chip[data-pos="1"] { transform: rotate(60deg)  translateX(190px) rotate(-60deg); }
.orbit__ring--2 .orbit__chip[data-pos="3"] { transform: rotate(180deg) translateX(190px) rotate(-180deg);}
.orbit__ring--2 .orbit__chip[data-pos="5"] { transform: rotate(300deg) translateX(190px) rotate(-300deg);}
@keyframes spin { to { transform: translate(-50%,-50%) rotate(360deg); } }

.orbit__dot {
  position: absolute;
  left: var(--x); top: var(--y);
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 12px var(--c-cyan);
  animation: blink 3s ease-in-out infinite;
}
.orbit__dot:nth-child(odd) { background: var(--c-amber); box-shadow: 0 0 12px var(--c-amber); animation-delay: 1s; }
@keyframes blink { 50% { opacity: .3; transform: scale(.5); } }

/* —— Logos —— */
.logos {
  position: relative;
  z-index: 1;
  padding: 36px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(12,18,38,.55);
  backdrop-filter: blur(8px);
}
.logos__title {
  text-align: center;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--text-3);
  text-transform: uppercase;
  margin: 0 0 18px;
}
.logos__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px 48px;
  color: var(--text-2);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 15px;
}
.logos__row span {
  position: relative;
  padding-left: 14px;
}
.logos__row span::before {
  content: '';
  position: absolute; left: 0; top: 50%;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-cyan);
  transform: translateY(-50%);
  opacity: .8;
}

/* —— 通用 Section —— */
.section {
  position: relative;
  z-index: 1;
  padding: 96px 0;
}
.section--alt {
  background: linear-gradient(180deg, rgba(12,18,38,.5), rgba(6,9,20,0));
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.section__head {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: center;
}
.section__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--c-cyan);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}
.section__sub {
  color: var(--text-2);
  font-size: 16px;
  max-width: 56ch;
  margin: 0 auto;
}

/* —— 服务卡片 —— */
.services {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 720px)  { .services { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .services { gap: 24px; } }
.service-card {
  position: relative;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(19,27,48,.6), rgba(15,21,37,.4));
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: transform .35s cubic-bezier(.16,1,.3,1), border-color .25s ease;
}
.service-card::before {
  content: '';
  position: absolute; inset: 0;
  background: var(--grad-soft);
  opacity: 0;
  transition: opacity .3s ease;
  pointer-events: none;
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(34,211,238,.4);
  box-shadow: 0 30px 60px -30px rgba(34,211,238,.3);
}
.service-card:hover::before { opacity: 1; }
.service-card__no {
  position: absolute; top: 24px; right: 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 2px;
}
.service-card__icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: rgba(34,211,238,.08);
  color: var(--c-cyan);
  margin-bottom: 24px;
  border: 1px solid rgba(34,211,238,.2);
}
.service-card h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: -.01em;
}
.service-card p {
  color: var(--text-2);
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.65;
}
.service-card__list {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
}
.service-card__list li {
  position: relative;
  padding: 8px 0 8px 22px;
  font-size: 14px;
  color: var(--text-2);
  border-top: 1px dashed var(--border-subtle);
}
.service-card__list li:first-child { border-top: 0; }
.service-card__list li::before {
  content: '';
  position: absolute; left: 4px; top: 14px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 8px var(--c-cyan);
  opacity: .8;
}
.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-cyan);
  transition: gap .2s ease;
}
.service-card__link:hover { gap: 10px; }

/* —— 关于 —— */
.about {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: start;
}
@media (min-width: 1024px) {
  .about { grid-template-columns: 1.2fr 1fr; gap: 64px; }
}
.about__copy p { color: var(--text-2); font-size: 16px; }
.about__values {
  margin-top: 32px;
  display: grid;
  gap: 16px;
}
@media (min-width: 640px) { .about__values { grid-template-columns: repeat(3, 1fr); } }
.about__values > div {
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(15,21,37,.4);
}
.about__value-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-cyan);
  letter-spacing: 2px;
}
.about__values h4 {
  margin: 8px 0 6px;
  font-size: 17px;
  font-weight: 600;
}
.about__values p { margin: 0; font-size: 14px; }

.about__panel {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(19,27,48,.7), rgba(15,21,37,.5));
  border: 1px solid var(--border);
  box-shadow: var(--shadow-3);
}
.about__panel-head {
  display: flex; align-items: center; gap: 10px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-2);
  letter-spacing: 1px;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--c-emerald);
  box-shadow: 0 0 10px var(--c-emerald);
  animation: pulse 2.4s ease-in-out infinite;
}
.about__panel-list {
  list-style: none;
  margin: 0; padding: 0;
}
.about__panel-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 0;
  font-size: 14px;
  color: var(--text-2);
  border-top: 1px dashed var(--border-subtle);
}
.about__panel-list li:first-child { border-top: 0; }
.tag {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--text-2);
  background: rgba(15,21,37,.6);
  letter-spacing: 1px;
}
.tag--ok { color: var(--c-emerald); border-color: rgba(52,211,153,.4); background: rgba(52,211,153,.08); }

.about__panel-foot {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}
.about__panel-foot .muted { font-size: 12px; color: var(--text-3); letter-spacing: 1px; display: block; }
.about__panel-foot strong { display: block; margin-top: 4px; font-size: 15px; }

/* —— 技术能力 —— */
.cap-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 720px) { .cap-grid { grid-template-columns: repeat(2, 1fr); } }
.cap {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(19,27,48,.5), rgba(15,21,37,.3));
  border: 1px solid var(--border-subtle);
}
.cap__head { margin-bottom: 22px; }
.cap__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  padding: 4px 10px;
  border-radius: 100px;
  background: rgba(34,211,238,.08);
  color: var(--c-cyan);
  border: 1px solid rgba(34,211,238,.2);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.cap h3 { font-size: 18px; font-weight: 600; margin: 0; }
.cap__bar {
  position: relative;
  height: 6px;
  border-radius: 100px;
  background: rgba(15,21,37,.8);
  overflow: hidden;
  margin-top: 12px;
}
.cap__bar span {
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 0;
  background: var(--grad-accent);
  border-radius: 100px;
  transition: width 1.2s cubic-bezier(.16,1,.3,1);
}

/* —— 流程 —— */
.process {
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  counter-reset: step;
}
@media (min-width: 720px)  { .process { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .process { grid-template-columns: repeat(5, 1fr); } }
.process__step {
  position: relative;
  padding: 24px;
  border-radius: var(--radius-md);
  background: rgba(15,21,37,.5);
  border: 1px solid var(--border-subtle);
  transition: transform .25s ease, border-color .25s ease;
}
.process__step:hover { transform: translateY(-4px); border-color: rgba(34,211,238,.4); }
.process__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-cyan);
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.process__step h3 { font-size: 18px; font-weight: 600; margin: 0 0 8px; }
.process__step p { color: var(--text-2); font-size: 14px; margin: 0; }

/* —— 案例 —— */
.cases {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 720px) { .cases { grid-template-columns: repeat(2, 1fr); } }
.case {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(19,27,48,.6), rgba(15,21,37,.3));
  border: 1px solid var(--border-subtle);
  transition: transform .3s ease, border-color .25s ease;
}
.case:hover { transform: translateY(-4px); border-color: rgba(34,211,238,.4); }
.case__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  padding: 4px 10px;
  border-radius: 100px;
  color: var(--c-amber);
  background: rgba(251,191,36,.08);
  border: 1px solid rgba(251,191,36,.25);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.case h3 { font-size: 20px; font-weight: 700; margin: 0 0 12px; }
.case > p { color: var(--text-2); font-size: 14px; margin: 0 0 20px; }
.case ul {
  list-style: none;
  margin: 0; padding: 20px 0 0;
  border-top: 1px solid var(--border-subtle);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.case ul li { display: flex; flex-direction: column; gap: 4px; }
.case ul span { font-size: 11px; color: var(--text-3); letter-spacing: 1px; }
.case ul strong {
  font-family: var(--font-display);
  font-size: 18px;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 700;
}

/* —— 联系 —— */
.contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}
@media (min-width: 1024px) { .contact { grid-template-columns: 1fr 1.2fr; gap: 64px; } }
.contact__intro p { color: var(--text-2); font-size: 16px; max-width: 50ch; }
.contact__list {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.contact__list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  background: rgba(15,21,37,.4);
  border: 1px solid var(--border-subtle);
}
.contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--text-3);
  text-transform: uppercase;
}
.contact__list strong { font-size: 15px; }

.contact__form {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(19,27,48,.7), rgba(15,21,37,.5));
  border: 1px solid var(--border);
  box-shadow: var(--shadow-3);
}
.field { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.field label {
  font-size: 13px;
  color: var(--text-2);
  font-weight: 500;
}
.field input,
.field select,
.field textarea {
  font-family: inherit;
  font-size: 15px;
  color: var(--text-1);
  background: rgba(6,9,20,.6);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
  width: 100%;
  resize: vertical;
}
.field input::placeholder,
.field textarea::placeholder { color: var(--text-3); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--c-cyan);
  background: rgba(6,9,20,.85);
  box-shadow: 0 0 0 3px rgba(34,211,238,.12);
}
.field select { appearance: none; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'><path d='M1 1.5L6 6.5L11 1.5' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/></svg>"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 38px; }
.field-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 18px;
}
.field-row .field { margin-bottom: 0; }
@media (min-width: 640px) { .field-row { grid-template-columns: repeat(2, 1fr); } }
.contact__tip {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--text-3);
  text-align: center;
}
.contact__tip.is-success { color: var(--c-emerald); }
.contact__tip.is-error   { color: var(--c-rose); }

/* —— Footer —— */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, rgba(6,9,20,.4), rgba(6,9,20,.8));
  padding: 64px 0 24px;
  margin-top: 80px;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
@media (min-width: 768px) { .footer__inner { grid-template-columns: 1.4fr 2fr; gap: 64px; } }
.footer__brand {
  display: flex; align-items: center; gap: 14px;
}
.footer__brand strong { display: block; font-size: 16px; }
.footer__brand span {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--text-3);
  margin-top: 4px;
}
.footer__cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
@media (min-width: 640px) { .footer__cols { grid-template-columns: repeat(3, 1fr); } }
.footer__cols h5 {
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--text-1);
  margin: 0 0 14px;
  text-transform: uppercase;
}
.footer__cols a, .footer__cols span {
  display: block;
  font-size: 14px;
  color: var(--text-2);
  padding: 4px 0;
  transition: color .2s ease;
}
.footer__cols a:hover { color: var(--c-cyan); }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 12px;
  color: var(--text-3);
}
.footer__bottom .beian {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-3);
  transition: color .2s ease;
}
.footer__bottom .beian:hover { color: var(--c-cyan); }
.footer__bottom .sep {
  margin: 0 10px;
  color: var(--text-3);
  opacity: .6;
}

/* —— 移动端展开菜单 —— */
@media (max-width: 1023px) {
  .nav__links.is-open {
    display: flex;
    position: absolute;
    top: 100%; left: 16px; right: 16px;
    flex-direction: column;
    gap: 0;
    padding: 12px;
    margin-top: 12px;
    border-radius: var(--radius-md);
    background: rgba(6,9,20,.92);
    border: 1px solid var(--border);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow-3);
  }
  .nav__links.is-open a {
    padding: 12px 14px;
    border-radius: 8px;
    color: var(--text-1);
  }
  .nav__links.is-open a:hover { background: rgba(34,211,238,.08); }
  .nav__links.is-open a::after { display: none; }
  .nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
  .nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }
}

/* —— 滚动显示动画 —— */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s cubic-bezier(.16,1,.3,1), transform .8s cubic-bezier(.16,1,.3,1);
  transition-delay: calc(var(--idx, 0) * 80ms);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* —— 减少动效 —— */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .orbit__ring { animation: none; }
}