/* =========================================================
   刻漏波(成都)智能科技有限公司 — 官网样式
   风格:深色科技感 / 渐变 / 毛玻璃 / 国外顶级科技公司质感
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root {
  --bg: #05060b;
  --bg-soft: #0a0c14;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.055);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);

  --text: #e9ebf3;
  --text-2: #a3aabc;
  --text-3: #6d7488;

  --cyan: #22d3ee;
  --violet: #8b5cf6;
  --grad: linear-gradient(120deg, #22d3ee 0%, #8b5cf6 100%);

  --font-en: "Sora", "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;

  --radius: 20px;
  --radius-sm: 12px;
  --container: 1180px;
  --header-h: 72px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background: rgba(34, 211, 238, 0.3);
  color: #fff;
}

/* 滚动条 */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(34,211,238,.4), rgba(139,92,246,.4));
  border-radius: 8px;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
em { font-style: normal; color: transparent; background: var(--grad); -webkit-background-clip: text; background-clip: text; }

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

/* ---------- 顶部滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 100%;
  background: var(--grad);
  transform-origin: left;
  transform: scaleX(0);
  z-index: 1000;
  pointer-events: none;
}

/* ---------- 导航栏 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  height: calc(var(--header-h) + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  transition: background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(5, 6, 11, 0.72);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom-color: var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 24px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  object-fit: cover;
}

.footer-brand .brand-mark { width: 30px; height: 30px; }

.brand-text { display: flex; flex-direction: column; line-height: 1.45; }

.brand-name {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.5px;
  line-height: 1.2;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-name-en {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-tagline {
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 1px;
}

/* 导航链接 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--text-2);
  border-radius: 10px;
  transition: color .25s, background .25s;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-actions { display: flex; align-items: center; gap: 14px; }
.nav-cta-mobile { display: none; }

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px; height: 42px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  padding: 0 9px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform .3s var(--ease), opacity .3s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s, border-color .3s, color .3s;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--grad);
  color: #fff;
  padding: 12px 26px;
  border: none;
  box-shadow: 0 0 0 0 rgba(34, 211, 238, 0);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -8px rgba(34, 211, 238, 0.45), 0 8px 24px -8px rgba(139, 92, 246, 0.4);
  filter: brightness(1.08);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  padding: 12px 26px;
}

.btn-ghost:hover {
  border-color: rgba(34, 211, 238, 0.55);
  color: var(--cyan);
  transform: translateY(-2px);
}

.btn-lg { padding: 15px 34px; font-size: 16px; }
.btn-sm { padding: 9px 20px; font-size: 14px; }

.btn-light {
  background: #fff;
  color: #0a0c14;
  padding: 15px 34px;
  font-size: 16px;
  border: none;
}

.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -10px rgba(255, 255, 255, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
  padding: 15px 34px;
  font-size: 16px;
}

.btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 60px) 0 120px;
  overflow: hidden;
}

/* 背景层 */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
}

.orb {
  position: absolute;
  border-radius: 50%;
  opacity: 0.55;
  will-change: transform;
}

.orb::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  filter: blur(90px);
}

.orb-a {
  width: 520px; height: 520px;
  left: -140px; top: -120px;
}

.orb-a::before {
  background: radial-gradient(circle, rgba(34, 211, 238, 0.28), transparent 65%);
  animation: float 14s ease-in-out infinite;
}

.orb-b {
  width: 460px; height: 460px;
  right: -120px; top: 6%;
}

.orb-b::before {
  background: radial-gradient(circle, rgba(139, 92, 246, 0.30), transparent 65%);
  animation: float 17s ease-in-out infinite reverse;
}

.orb-c {
  width: 380px; height: 380px;
  left: 42%; bottom: -140px;
}

.orb-c::before {
  background: radial-gradient(circle, rgba(34, 211, 238, 0.16), transparent 65%);
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) translateX(0); }
  50% { transform: translateY(-34px) translateX(18px); }
}

.noise {
  position: absolute;
  inset: 0;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

/* Hero 内容 */
.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 12.5px;
  letter-spacing: 2px;
  color: var(--text-2);
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(8px);
  margin-bottom: 34px;
}

.hero-badge .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.9);
  animation: pulse 2.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.8); }
}

.hero-title {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(40px, 7.2vw, 78px);
  line-height: 1.16;
  letter-spacing: 1px;
  margin-bottom: 28px;
}

.hero-title .line { display: block; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 640px;
  font-size: clamp(16px, 2.1vw, 19px);
  color: var(--text-2);
  margin-bottom: 12px;
}

.hero-sub em {
  font-style: normal;
  color: var(--text);
  border-bottom: 1px solid rgba(34, 211, 238, 0.5);
}

.hero-en {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 42px;
}

.hero-actions {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
}

/* 底部波形 */
.hero-wave {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  z-index: 1;
  pointer-events: none;
}

.hero-wave svg { width: 100%; height: 120px; }

/* ---------- 数据统计 ---------- */
.stats {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}

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

.stat {
  padding: 44px 28px;
  text-align: center;
  border-right: 1px solid var(--border);
}

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

.stat-num {
  display: block;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(34px, 4.4vw, 52px);
  line-height: 1.1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
}

.stat-label i {
  font-style: normal;
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--text-3);
  text-transform: uppercase;
}

/* ---------- 通用区块 ---------- */
.section {
  padding: 120px 0;
  position: relative;
}

.section-alt {
  background:
    radial-gradient(ellipse 60% 50% at 15% 20%, rgba(34, 211, 238, 0.06), transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 80%, rgba(139, 92, 246, 0.07), transparent 60%),
    var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  max-width: 720px;
  margin-bottom: 64px;
}

.kicker {
  font-family: var(--font-en);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 18px;
}

.section-title {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.28;
  margin-bottom: 20px;
}

.section-desc {
  font-size: 16.5px;
  color: var(--text-2);
}

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

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 30px 26px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .45s var(--ease), border-color .45s, background .45s, box-shadow .45s;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .5s var(--ease);
}

.card:hover {
  transform: translateY(-8px);
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  box-shadow: 0 24px 48px -18px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(34, 211, 238, 0.12);
}

.card:hover::before { transform: scaleX(1); }

.card-featured {
  border-color: rgba(34, 211, 238, 0.28);
  background:
    radial-gradient(ellipse 90% 60% at 50% 0%, rgba(34, 211, 238, 0.09), transparent 70%),
    var(--bg-card);
}

.card-badge {
  position: absolute;
  top: 18px; right: 18px;
  font-family: var(--font-en);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.5px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.12);
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.3);
}

.card-icon {
  width: 54px; height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--cyan);
  margin-bottom: 6px;
  transition: color .4s, border-color .4s, box-shadow .4s;
}

.card:hover .card-icon {
  color: var(--violet);
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: 0 0 24px -4px rgba(139, 92, 246, 0.35);
}

.card h3 {
  font-family: var(--font-en);
  font-size: 19px;
  font-weight: 600;
}

.card-en {
  font-family: var(--font-en);
  font-size: 11.5px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--text-3);
  margin-top: -6px;
}

.card-desc {
  font-size: 14.5px;
  color: var(--text-2);
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.card-tags li {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: border-color .3s, color .3s;
}

.card:hover .card-tags li {
  border-color: rgba(255, 255, 255, 0.16);
  color: var(--text);
}

/* ---------- 项目案例 ---------- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.case-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .45s var(--ease), border-color .45s, background .45s, box-shadow .45s;
}

.case-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .5s var(--ease);
  z-index: 2;
}

.case-card:hover {
  transform: translateY(-8px);
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  box-shadow: 0 24px 48px -18px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(34, 211, 238, 0.12);
}

.case-card:hover::before { transform: scaleX(1); }

.case-thumb {
  position: relative;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse 70% 80% at 20% 10%, rgba(34, 211, 238, 0.14), transparent 60%),
    radial-gradient(ellipse 70% 80% at 85% 90%, rgba(139, 92, 246, 0.16), transparent 60%),
    linear-gradient(160deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012));
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.case-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 40%, #000 30%, transparent 75%);
  pointer-events: none;
}

.case-thumb svg {
  position: relative;
  z-index: 1;
  opacity: 0.9;
  transition: transform .5s var(--ease);
}

.case-card:hover .case-thumb svg { transform: scale(1.08); }

/* 案例截图轮播(纯 CSS 自动切换) */
.case-slides {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.case-slides img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  animation: caseFade 12s infinite;
}

.case-slides img:nth-child(1) { animation-delay: 0s; }
.case-slides img:nth-child(2) { animation-delay: 4s; }
.case-slides img:nth-child(3) { animation-delay: 8s; }

@keyframes caseFade {
  0%   { opacity: 0; }
  3%   { opacity: 1; }
  30%  { opacity: 1; }
  33%  { opacity: 0; }
  100% { opacity: 0; }
}

.case-thumb-num {
  position: absolute;
  right: 16px;
  bottom: 10px;
  z-index: 1;
  font-family: var(--font-en);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0.28;
}

.case-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 26px 26px;
  flex: 1;
}

.case-cat {
  align-self: flex-start;
  font-family: var(--font-en);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.5px;
  padding: 4px 11px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.1);
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.3);
}

.case-body h3 {
  font-family: var(--font-en);
  font-size: 18px;
  font-weight: 600;
}

.case-desc {
  font-size: 14px;
  color: var(--text-2);
  flex: 1;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.case-tags li {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: border-color .3s, color .3s;
}

.case-card:hover .case-tags li {
  border-color: rgba(255, 255, 255, 0.16);
  color: var(--text);
}

/* ---------- 技术栈 ---------- */
.stack-groups {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.stack-group {
  padding: 30px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .4s var(--ease), border-color .4s;
}

.stack-group:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
}

.stack-group-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.stack-num {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 14px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stack-group h3 {
  font-family: var(--font-en);
  font-size: 18px;
  font-weight: 600;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  font-size: 13.5px;
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: all .3s var(--ease);
  cursor: default;
}

.chip:hover {
  color: var(--text);
  border-color: rgba(34, 211, 238, 0.45);
  background: rgba(34, 211, 238, 0.07);
  transform: translateY(-2px);
}

/* ---------- 工作流程 ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.process-step {
  position: relative;
  padding: 34px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .4s var(--ease), border-color .4s;
}

.process-step:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
}

.process-num {
  display: block;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 44px;
  line-height: 1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0.9;
  margin-bottom: 18px;
}

.process-step h3 {
  font-family: var(--font-en);
  font-size: 18.5px;
  font-weight: 600;
  margin-bottom: 4px;
}

.process-en {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 12px;
}

.process-step p:last-child {
  font-size: 14.5px;
  color: var(--text-2);
}

.process-line {
  position: absolute;
  top: 34px;
  right: -24px;
  width: 24px;
  height: 1px;
  background: linear-gradient(90deg, rgba(255,255,255,0.25), transparent);
}

.process-step:last-child .process-line { display: none; }

/* ---------- 关于我们 ---------- */
.section-about {
  background:
    radial-gradient(ellipse 55% 55% at 15% 50%, rgba(139, 92, 246, 0.07), transparent 65%),
    radial-gradient(ellipse 55% 55% at 90% 30%, rgba(34, 211, 238, 0.05), transparent 65%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 72px;
  align-items: center;
}

.about-orbit {
  display: flex;
  justify-content: center;
}

.about-orbit svg {
  max-width: 100%;
  height: auto;
  animation: orbit-spin 60s linear infinite;
  filter: drop-shadow(0 0 40px rgba(34, 211, 238, 0.15));
}

@keyframes orbit-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.about-quote {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 16px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 24px;
}

.about-text {
  font-size: 16px;
  color: var(--text-2);
  margin-bottom: 16px;
}

.about-text strong { color: var(--text); font-weight: 600; }

.about-points {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.about-points li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text);
}

.about-points svg {
  flex-shrink: 0;
  color: var(--cyan);
}

/* ---------- CTA ---------- */
.cta {
  padding: 120px 0 130px;
  position: relative;
}

.cta-card {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 88px 48px;
  border-radius: 28px;
  border: 1px solid var(--border-strong);
  background:
    radial-gradient(ellipse 70% 90% at 50% -10%, rgba(34, 211, 238, 0.14), transparent 65%),
    radial-gradient(ellipse 60% 80% at 85% 110%, rgba(139, 92, 246, 0.16), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
}

.cta-glow {
  position: absolute;
  width: 420px; height: 420px;
  left: 50%; top: -240px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(34, 211, 238, 0.18), transparent 65%);
  filter: blur(40px);
  pointer-events: none;
}

.cta-title {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 50px);
  line-height: 1.25;
  margin-bottom: 14px;
}

.cta-en {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 20px;
}

.cta-desc {
  max-width: 520px;
  margin: 0 auto 40px;
  color: var(--text-2);
  font-size: 16px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.cta-mail {
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 1.5px;
  color: var(--text-3);
}

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 56px;
}

.footer-slogan {
  margin-top: 18px;
  font-size: 14px;
  color: var(--text-3);
  line-height: 1.8;
}

.footer-col h4 {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a, .footer-contact span {
  font-size: 14.5px;
  color: var(--text-3);
  transition: color .25s;
}

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

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.footer-contact svg {
  flex-shrink: 0;
  margin-top: 4px;
  color: var(--text-3);
}

.footer-contact a:hover { color: var(--cyan); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 26px;
  padding-bottom: 30px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-3);
}

/* ---------- 滚动渐入动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* 尊重系统减弱动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid var(--border); }
  .stat:nth-child(odd) { border-right: 1px solid var(--border); }
  .stat:nth-child(even) { border-right: none; }
  .stat:nth-last-child(-n+2) { border-bottom: none; }
}

@media (max-width: 900px) {
  .stack-groups { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .process-line { display: none; }
}

@media (max-width: 760px) {
  :root {
    --header-h: 64px;
    /* 部分移动端内置浏览器不会返回 safe-area，仍会用顶部工具栏覆盖页面。 */
    --mobile-top-inset: max(36px, env(safe-area-inset-top, 0px));
  }

  .site-header {
    height: calc(var(--header-h) + var(--mobile-top-inset));
    padding-top: var(--mobile-top-inset);
  }

  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .nav-cta-mobile { display: block; margin-top: 18px; }
  .nav-cta-mobile .btn { width: 100%; }

  .nav-links {
    position: fixed;
    top: calc(var(--header-h) + var(--mobile-top-inset));
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(5, 6, 11, 0.96);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px 28px;
    gap: 4px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-16px);
    transition: transform .3s var(--ease), opacity .25s ease, visibility .25s;
  }

  .nav-links.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }
  .nav-links a { padding: 12px 16px; font-size: 16px; }

  .hero {
    align-items: flex-start;
    padding: calc(var(--header-h) + var(--mobile-top-inset) + 36px) 0 96px;
  }
  .hero-wave svg { height: 70px; }

  .section { padding: 84px 0; }
  .cta { padding: 84px 0 96px; }
  .cta-card { padding: 64px 24px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .cards-grid, .process-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
}

/* =========================================================
   2026-09 视觉增强：在原有深色科技风上强化层次、节奏与质感
   ========================================================= */
:root {
  --bg: #03050a;
  --bg-soft: #080c15;
  --bg-card: rgba(13, 20, 34, 0.68);
  --bg-card-hover: rgba(18, 29, 48, 0.84);
  --border: rgba(148, 163, 184, 0.12);
  --border-strong: rgba(148, 163, 184, 0.24);
  --text: #f4f7fb;
  --text-2: #aab5c8;
  --text-3: #77849a;
  --cyan: #31d7f2;
  --violet: #8d6cff;
  --grad: linear-gradient(120deg, #31d7f2 0%, #5b9cff 48%, #9b6cff 100%);
  --radius: 24px;
  --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 18px 50px rgba(49, 215, 242, 0.12);
}

body {
  background:
    radial-gradient(circle at 15% 8%, rgba(49, 215, 242, 0.055), transparent 25%),
    radial-gradient(circle at 88% 35%, rgba(141, 108, 255, 0.055), transparent 28%),
    var(--bg);
}

.site-header.scrolled {
  background: rgba(3, 5, 10, 0.82);
  border-bottom-color: rgba(148, 163, 184, 0.13);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.22);
}

.brand-mark {
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 0 4px rgba(49, 215, 242, 0.055), 0 8px 22px rgba(49, 215, 242, 0.12);
}

.nav-links a { position: relative; }

.nav-links a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 1px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .25s var(--ease);
}

.nav-links a:hover::after { transform: scaleX(1); }

.btn {
  border-radius: 14px;
  letter-spacing: .01em;
}

.btn-primary {
  box-shadow: 0 12px 32px rgba(49, 215, 242, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  box-shadow: 0 18px 42px rgba(49, 215, 242, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

.btn-ghost,
.btn-outline {
  background: rgba(255, 255, 255, 0.025);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.hero-inner { max-width: 980px; }

.hero-badge {
  border-color: rgba(148, 163, 184, 0.22);
  background: linear-gradient(100deg, rgba(49, 215, 242, 0.06), rgba(141, 108, 255, 0.06));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 12px 36px rgba(0, 0, 0, 0.18);
}

.hero-title {
  font-size: clamp(44px, 7.4vw, 84px);
  line-height: 1.1;
  letter-spacing: -0.035em;
  text-wrap: balance;
  text-shadow: 0 18px 60px rgba(0, 0, 0, 0.35);
}

.hero-sub {
  max-width: 720px;
  line-height: 1.9;
  color: #b7c1d2;
}

.hero-en { color: #8490a5; }

.stats {
  background: rgba(7, 11, 19, 0.78);
  border-top-color: rgba(148, 163, 184, 0.11);
  border-bottom-color: rgba(148, 163, 184, 0.11);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.stat-num { text-shadow: 0 8px 28px rgba(49, 215, 242, 0.14); }

.section { padding-top: 128px; padding-bottom: 128px; }

.section-alt {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.012), rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.012));
  border-top: 1px solid rgba(148, 163, 184, 0.07);
  border-bottom: 1px solid rgba(148, 163, 184, 0.07);
}

.section-head { margin-bottom: 64px; }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  border: 1px solid rgba(49, 215, 242, 0.15);
  border-radius: 999px;
  background: rgba(49, 215, 242, 0.035);
}

.kicker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(49, 215, 242, 0.75);
}

.section-title {
  letter-spacing: -0.025em;
  line-height: 1.2;
  text-wrap: balance;
}

.section-desc { line-height: 1.9; }

.card,
.stack-group,
.process-step {
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), transparent 42%),
    var(--bg-card);
  border-color: rgba(148, 163, 184, 0.13);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.045);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.card:hover,
.stack-group:hover,
.process-step:hover {
  border-color: rgba(49, 215, 242, 0.28);
  box-shadow: var(--shadow-card), var(--shadow-glow), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.card-icon {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 14px 32px rgba(49, 215, 242, 0.08);
}

.card h3,
.stack-group h3,
.process-step h3 { letter-spacing: -0.015em; }

.card-desc,
.process-step p:last-child,
.about-text { line-height: 1.85; }

.card-tags li {
  border: 1px solid rgba(148, 163, 184, 0.11);
  background: rgba(255, 255, 255, 0.025);
}

.about-quote {
  background: linear-gradient(135deg, rgba(49, 215, 242, 0.075), rgba(141, 108, 255, 0.065));
  border-color: rgba(148, 163, 184, 0.16);
  box-shadow: var(--shadow-card);
}

.cta-card {
  background:
    radial-gradient(circle at 15% 15%, rgba(49, 215, 242, 0.16), transparent 34%),
    radial-gradient(circle at 86% 82%, rgba(141, 108, 255, 0.18), transparent 36%),
    linear-gradient(145deg, rgba(18, 28, 46, 0.96), rgba(8, 12, 21, 0.96));
  border-color: rgba(148, 163, 184, 0.19);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.38), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.site-footer {
  background: linear-gradient(180deg, rgba(8, 12, 21, 0.65), rgba(3, 5, 10, 0.98));
  border-top-color: rgba(148, 163, 184, 0.1);
}

@media (max-width: 760px) {
  .hero-title { font-size: 40px; line-height: 1.16; letter-spacing: -0.025em; }
  .hero-sub { line-height: 1.8; }
  .section { padding-top: 92px; padding-bottom: 92px; }
  .section-head { margin-bottom: 44px; }
  .card, .stack-group, .process-step { box-shadow: 0 14px 40px rgba(0, 0, 0, 0.2); }
}