/* ==========================================================================
   云枢科技 CloudPivot — 企业官网样式
   设计基调：大留白 / 深空蓝 / 克制的动效
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --ink: #0a1020;
  --ink-2: #1b2436;
  --muted: #5a6478;
  --muted-2: #8a93a6;
  --line: #e4e8f1;
  --line-strong: #d3d9e6;

  --brand: #1b4dff;
  --brand-dark: #0b2fd8;
  --brand-light: #4d78ff;
  --cyan: #6fd9ff;

  --dark: #070b1a;
  --dark-2: #0c1226;

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;

  --shadow-xs: 0 1px 2px rgba(10, 16, 32, 0.05);
  --shadow-sm: 0 2px 4px rgba(10, 16, 32, 0.04), 0 10px 26px -14px rgba(10, 16, 32, 0.18);
  --shadow-md: 0 18px 44px -22px rgba(10, 16, 32, 0.28);
  --shadow-brand: 0 14px 34px -14px rgba(27, 77, 255, 0.55);

  --container: 1200px;
  --gutter: clamp(20px, 5vw, 40px);
  --header-h: 74px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-2);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
em { font-style: normal; }

::selection {
  background: rgba(27, 77, 255, 0.16);
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--ink);
  color: #fff;
  border-radius: 0 0 8px 8px;
  font-size: 14px;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 0; color: #fff; }

/* ---------- 3. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  position: relative;
  padding: clamp(72px, 8.5vw, 128px) 0;
  scroll-margin-top: var(--header-h);
}

.section--soft {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section--dark {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.72);
  overflow: hidden;
}

/* ---------- 4. 排版组件 ---------- */
.section-kicker {
  margin: 0 0 18px;
  color: var(--brand);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.section-kicker--light { color: var(--cyan); }

.section-title {
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.24;
  text-wrap: balance;
}
.section-title--light { color: #fff; }

.section-desc {
  margin-top: 20px;
  max-width: 52ch;
  color: var(--muted);
  font-size: 16.5px;
  line-height: 1.85;
}
.section-desc--light { color: rgba(255, 255, 255, 0.62); }

.section-head { max-width: 720px; margin-bottom: clamp(40px, 5vw, 64px); }
.section-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.section-head--center .section-desc { margin-left: auto; margin-right: auto; }

/* ---------- 5. 按钮 ---------- */
.btn {
  --btn-bg: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--btn-bg);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background-color 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}
.btn svg { transition: transform 0.25s var(--ease); }
.btn:hover svg { transform: translateX(3px); }

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover {
  background: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 20px 40px -16px rgba(27, 77, 255, 0.62);
}
.btn-primary:active { transform: translateY(0); }

.btn-ghost-light {
  border-color: rgba(255, 255, 255, 0.28);
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(6px);
}
.btn-ghost-light:hover {
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-lg { padding: 15px 30px; font-size: 15.5px; }
.btn-block { width: 100%; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  color: var(--brand);
  font-size: 15px;
  font-weight: 600;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: gap 0.25s var(--ease), border-color 0.25s var(--ease);
}
.link-arrow:hover { gap: 13px; border-color: rgba(27, 77, 255, 0.4); }

/* ---------- 6. 头部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background-color 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-solid {
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 6px 24px -18px rgba(10, 16, 32, 0.35);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 100%;
}

/* 品牌 */
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { display: block; flex-shrink: 0; }
.brand-mark svg { transition: transform 0.4s var(--ease); }
.brand:hover .brand-mark svg { transform: rotate(-6deg); }

.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-text strong {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  transition: color 0.35s var(--ease);
}
.brand-text em {
  margin-top: 5px;
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: rgba(255, 255, 255, 0.5);
  transition: color 0.35s var(--ease);
}
.site-header.is-solid .brand-text strong { color: var(--ink); }
.site-header.is-solid .brand-text em { color: var(--muted-2); }

/* 主菜单 */
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative;
  padding: 9px 15px;
  border-radius: 8px;
  font-size: 14.5px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.72);
  transition: color 0.25s var(--ease), background-color 0.25s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav a:hover { color: #fff; }
.nav a.is-active { color: #fff; }
.nav a.is-active::after { transform: scaleX(1); }

.site-header.is-solid .nav a { color: var(--muted); }
.site-header.is-solid .nav a:hover,
.site-header.is-solid .nav a.is-active { color: var(--brand); }

/* 头部右侧 */
.header-actions { display: flex; align-items: center; gap: 14px; }

.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.82);
  transition: color 0.25s var(--ease);
}
.header-phone:hover { color: #fff; }
.site-header.is-solid .header-phone { color: var(--ink-2); }
.site-header.is-solid .header-phone:hover { color: var(--brand); }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 50%;
  width: 17px;
  height: 1.8px;
  border-radius: 2px;
  background: #fff;
  transform: translateX(-50%);
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 23px; }
.site-header.is-solid .nav-toggle { border-color: var(--line-strong); background: #fff; }
.site-header.is-solid .nav-toggle span { background: var(--ink); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateX(-50%) translateY(3.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateX(-50%) translateY(-3.5px) rotate(-45deg); }

/* ---------- 7. Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(64px, 9vw, 108px)) 0 clamp(72px, 9vw, 120px);
  background: var(--dark);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg { position: absolute; inset: 0; z-index: 0; }

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
}
.hero-glow--a {
  width: 720px;
  height: 720px;
  top: -320px;
  left: 50%;
  transform: translateX(-58%);
  background: radial-gradient(circle, rgba(27, 77, 255, 0.72), transparent 68%);
}
.hero-glow--b {
  width: 560px;
  height: 560px;
  top: 40px;
  right: -180px;
  background: radial-gradient(circle, rgba(0, 194, 255, 0.30), transparent 70%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(ellipse 78% 62% at 50% 12%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 78% 62% at 50% 12%, #000 30%, transparent 78%);
}

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 16px 7px 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.78);
}
.eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #35e0a1;
  box-shadow: 0 0 0 4px rgba(53, 224, 161, 0.16);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(53, 224, 161, 0.14); }
  50% { box-shadow: 0 0 0 7px rgba(53, 224, 161, 0.04); }
}

.hero-title {
  margin: 26px 0 0;
  max-width: 16em;
  color: #fff;
  font-size: clamp(34px, 6.2vw, 72px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.grad-text {
  background: linear-gradient(100deg, #7ea8ff 0%, #ffffff 42%, #6fd9ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  margin-top: 24px;
  max-width: 40em;
  color: rgba(255, 255, 255, 0.62);
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 38px;
}

.hero-trust {
  display: flex;
  align-items: baseline;
  gap: 7px;
  margin-top: 34px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.45);
}
.hero-trust strong {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

/* 产品界面示意 */
.app-mock {
  width: 100%;
  max-width: 940px;
  margin-top: clamp(52px, 6vw, 84px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(22, 30, 55, 0.94), rgba(11, 16, 34, 0.96));
  box-shadow: 0 50px 100px -50px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
  overflow: hidden;
  text-align: left;
}

.app-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 13px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(255, 255, 255, 0.02);
}
.app-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
}
.app-dot:nth-child(1) { background: #ff5f57; opacity: 0.7; }
.app-dot:nth-child(2) { background: #febc2e; opacity: 0.7; }
.app-dot:nth-child(3) { background: #28c840; opacity: 0.7; }
.app-url {
  margin-left: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.4);
}

.app-body { display: flex; min-height: 248px; }

.app-side {
  width: 132px;
  padding: 18px 14px;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.app-side-logo {
  width: 26px;
  height: 26px;
  margin-bottom: 8px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--brand-light), var(--brand-dark));
}
.app-side-item {
  height: 9px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.09);
}
.app-side-item--short { width: 62%; }
.app-side-item.is-active {
  background: rgba(109, 168, 255, 0.5);
  box-shadow: 0 0 0 1px rgba(109, 168, 255, 0.25);
}

.app-main { flex: 1; padding: 20px 22px; min-width: 0; }

.app-kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.app-kpi {
  padding: 13px 14px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.03);
}
.app-kpi-label {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.38);
}
.app-kpi-num {
  display: block;
  margin-top: 3px;
  color: #fff;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.app-kpi-num em { font-size: 11px; font-weight: 600; color: rgba(255, 255, 255, 0.5); margin-left: 2px; }
.app-kpi-trend {
  display: inline-block;
  margin-top: 5px;
  padding: 1px 7px;
  border-radius: 999px;
  background: rgba(53, 224, 161, 0.14);
  color: #4ee0ab;
  font-size: 10px;
  font-weight: 600;
}

.app-chart {
  margin-top: 14px;
  padding: 14px 16px 16px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.02);
}
.app-chart-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.04em;
}
.app-chart-legend { color: rgba(255, 255, 255, 0.26); }

.app-bars {
  display: flex;
  align-items: flex-end;
  gap: 7px;
  height: 92px;
  margin-top: 14px;
}
.app-bars i {
  flex: 1;
  height: var(--h);
  border-radius: 4px 4px 2px 2px;
  background: linear-gradient(180deg, rgba(109, 168, 255, 0.85), rgba(27, 77, 255, 0.28));
  transform-origin: bottom;
  animation: barGrow 1.1s var(--ease) backwards;
}
.app-bars i:nth-child(1) { animation-delay: 0.35s; }
.app-bars i:nth-child(2) { animation-delay: 0.41s; }
.app-bars i:nth-child(3) { animation-delay: 0.47s; }
.app-bars i:nth-child(4) { animation-delay: 0.53s; }
.app-bars i:nth-child(5) { animation-delay: 0.59s; }
.app-bars i:nth-child(6) { animation-delay: 0.65s; }
.app-bars i:nth-child(7) { animation-delay: 0.71s; }
.app-bars i:nth-child(8) { animation-delay: 0.77s; }
.app-bars i:nth-child(9) { animation-delay: 0.83s; }
.app-bars i:nth-child(10) { animation-delay: 0.89s; }
.app-bars i:nth-child(11) { animation-delay: 0.95s; }
.app-bars i:nth-child(12) {
  animation-delay: 1.01s;
  background: linear-gradient(180deg, #7fd8ff, rgba(0, 194, 255, 0.35));
}
@keyframes barGrow {
  from { transform: scaleY(0.04); opacity: 0; }
  to { transform: scaleY(1); opacity: 1; }
}

.hero-fade {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 160px;
  z-index: 0;
  background: linear-gradient(to bottom, transparent, rgba(7, 11, 26, 0.85));
  pointer-events: none;
}

/* ---------- 8. 数据条 ---------- */
.stats {
  position: relative;
  background: var(--dark);
  padding-bottom: clamp(56px, 6vw, 80px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.stat {
  padding: 8px 10px;
  text-align: center;
  position: relative;
}
.stat:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -4px;
  top: 18%;
  height: 64%;
  width: 1px;
  background: rgba(255, 255, 255, 0.09);
}
.stat-num {
  display: block;
  color: #fff;
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- 9. 关于 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(40px, 6vw, 88px);
  align-items: start;
}
.about-head .section-desc { max-width: 46ch; }

.about-cards { display: flex; flex-direction: column; gap: 14px; }

.value-card {
  position: relative;
  padding: 26px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease),
    transform 0.3s var(--ease);
}
.value-card:hover {
  border-color: rgba(27, 77, 255, 0.32);
  box-shadow: var(--shadow-sm);
  transform: translateY(-3px);
}
.value-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  border-radius: 12px;
  background: rgba(27, 77, 255, 0.08);
  color: var(--brand);
}
.value-card h3 { font-size: 17.5px; }
.value-card p {
  margin-top: 9px;
  color: var(--muted);
  font-size: 14.8px;
  line-height: 1.8;
}

/* ---------- 10. 核心业务 ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.service-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 32px 28px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
}
.service-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--brand-light) 60%, var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(27, 77, 255, 0.24);
  box-shadow: var(--shadow-md);
}
.service-card:hover::before { transform: scaleX(1); }

.service-num {
  position: absolute;
  top: 26px;
  right: 26px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--line-strong);
}
.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  border-radius: 14px;
  background: linear-gradient(160deg, rgba(27, 77, 255, 0.1), rgba(111, 217, 255, 0.12));
  color: var(--brand);
  transition: background 0.35s var(--ease), transform 0.35s var(--ease);
}
.service-card:hover .service-icon {
  background: var(--brand);
  color: #fff;
  transform: scale(1.04);
}
.service-card h3 { font-size: 18.5px; }
.service-card p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 14.8px;
  line-height: 1.8;
}
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: auto;
  padding-top: 22px;
}
.service-tags li {
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.02em;
}

/* ---------- 11. 技术实力 ---------- */
.tech-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 88% 0%, rgba(27, 77, 255, 0.34), transparent 62%),
    radial-gradient(ellipse 50% 46% at 0% 100%, rgba(0, 194, 255, 0.14), transparent 68%);
  pointer-events: none;
}
.tech-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
  gap: clamp(40px, 6vw, 84px);
  align-items: center;
}

.tech-points { margin-top: 34px; display: flex; flex-direction: column; gap: 20px; }
.tech-points li {
  padding-left: 20px;
  border-left: 2px solid rgba(109, 217, 255, 0.32);
}
.tech-points strong {
  display: block;
  color: #fff;
  font-size: 15.5px;
  font-weight: 600;
}
.tech-points span {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.5);
}

.tech-stack {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.035);
  backdrop-filter: blur(8px);
}
.stack-group { display: flex; flex-direction: column; gap: 11px; }
.stack-label {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.34);
}
.stack-chips { display: flex; flex-wrap: wrap; gap: 7px; }
.stack-chips span {
  padding: 5px 11px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.76);
  font-size: 12.4px;
  letter-spacing: 0.01em;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease),
    color 0.25s var(--ease), transform 0.25s var(--ease);
}
.stack-chips span:hover {
  background: rgba(27, 77, 255, 0.28);
  border-color: rgba(109, 168, 255, 0.5);
  color: #fff;
  transform: translateY(-2px);
}

/* ---------- 12. 案例 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.case-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px 30px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
}
.case-card:hover {
  transform: translateY(-5px);
  border-color: rgba(27, 77, 255, 0.24);
  box-shadow: var(--shadow-md);
}
.case-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.case-tag {
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(27, 77, 255, 0.07);
  color: var(--brand);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.case-year {
  font-size: 12.5px;
  color: var(--muted-2);
  letter-spacing: 0.06em;
}
.case-card h3 { font-size: 19px; }
.case-card > p {
  margin: 10px 0 24px;
  color: var(--muted);
  font-size: 14.8px;
  line-height: 1.8;
}
.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px dashed var(--line-strong);
}
.case-metrics div { display: flex; flex-direction: column; }
.case-metrics strong {
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.case-metrics span {
  margin-top: 2px;
  font-size: 12px;
  color: var(--muted-2);
}

/* ---------- 13. 流程 ---------- */
.process-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  counter-reset: step;
}
.process-step {
  position: relative;
  padding: 28px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    border-color 0.3s var(--ease);
}
.process-step:hover {
  transform: translateY(-4px);
  border-color: rgba(27, 77, 255, 0.26);
  box-shadow: var(--shadow-sm);
}
.process-index {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--brand);
  font-variant-numeric: tabular-nums;
}
.process-step h3 { font-size: 17px; }
.process-step p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

/* ---------- 14. 评价 ---------- */
.quote-section {
  padding: clamp(60px, 7vw, 96px) 0;
  border-top: 1px solid var(--line);
}
.quote {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: clamp(32px, 4vw, 52px) clamp(26px, 4vw, 56px);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, #f7f9ff, #eef3ff 60%, #f4f8ff);
  border: 1px solid rgba(27, 77, 255, 0.1);
  text-align: center;
}
.quote-mark {
  margin: 0 auto 14px;
  color: var(--brand);
}
.quote blockquote {
  margin: 0;
  color: var(--ink);
  font-size: clamp(17px, 2.1vw, 23px);
  font-weight: 500;
  line-height: 1.72;
  letter-spacing: -0.01em;
}
.quote figcaption {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 26px;
  text-align: left;
}
.quote-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--brand), var(--brand-dark));
  color: #fff;
  font-size: 15px;
  font-weight: 600;
}
.quote figcaption strong {
  display: block;
  color: var(--ink);
  font-size: 14.5px;
  font-weight: 600;
}
.quote figcaption em {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 12.8px;
}

/* ---------- 15. 联系我们 ---------- */
.contact { padding-bottom: clamp(72px, 8vw, 112px); }
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
  gap: clamp(40px, 5vw, 72px);
  align-items: start;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 36px;
}
.contact-list li { display: flex; align-items: flex-start; gap: 14px; }
.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 11px;
  background: var(--bg-soft);
  color: var(--brand);
  border: 1px solid var(--line);
}
.contact-list strong {
  display: block;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.contact-list em {
  display: block;
  margin-top: 2px;
  color: var(--muted-2);
  font-size: 13px;
}

.contact-panel {
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.field { display: flex; flex-direction: column; gap: 7px; margin-bottom: 16px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field-row .field { margin-bottom: 16px; }

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  letter-spacing: 0.01em;
}
.field label span { color: var(--brand); }

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #fdfdff;
  color: var(--ink);
  font-family: inherit;
  font-size: 14.5px;
  line-height: 1.5;
  transition: border-color 0.22s var(--ease), box-shadow 0.22s var(--ease),
    background-color 0.22s var(--ease);
  appearance: none;
  -webkit-appearance: none;
}
.field textarea { resize: vertical; min-height: 96px; }

.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%238a93a6' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
  cursor: pointer;
}

.field input::placeholder,
.field textarea::placeholder { color: #a9b1c2; }

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(27, 77, 255, 0.1);
}
.field.is-invalid input,
.field.is-invalid select,
.field.is-invalid textarea {
  border-color: #e5484d;
  box-shadow: 0 0 0 4px rgba(229, 72, 77, 0.08);
}

.contact-form .btn { margin-top: 6px; }

.form-tip {
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted-2);
  text-align: center;
}
.form-status {
  margin-top: 10px;
  font-size: 13.5px;
  font-weight: 500;
  color: #17915e;
  text-align: center;
  min-height: 20px;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
.form-status.is-visible { opacity: 1; transform: translateY(0); }
.form-status.is-error { color: #d13438; }

/* ---------- 16. 页脚 ---------- */
.site-footer {
  padding: clamp(52px, 6vw, 76px) 0 0;
  background: var(--dark);
  color: rgba(255, 255, 255, 0.55);
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: clamp(36px, 5vw, 72px);
  padding-bottom: clamp(40px, 4vw, 56px);
}
.brand--footer .brand-text strong { color: #fff; }
.brand--footer .brand-text em { color: rgba(255, 255, 255, 0.4); }
.footer-brand p {
  margin-top: 20px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.45);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.footer-col { display: flex; flex-direction: column; gap: 11px; }
.footer-col h4 {
  margin-bottom: 4px;
  color: #fff;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.footer-col a,
.footer-col span {
  font-size: 13.8px;
  color: rgba(255, 255, 255, 0.46);
  transition: color 0.22s var(--ease);
}
.footer-col a:hover { color: #fff; }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 22px;
  padding-bottom: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 12.8px;
  color: rgba(255, 255, 255, 0.36);
}
.footer-meta { display: flex; align-items: center; gap: 18px; }
.footer-meta a { transition: color 0.22s var(--ease); }
.footer-meta a:hover { color: #fff; }

/* ---------- 17. 滚动动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1080px) {
  .nav { gap: 0; }
  .nav a { padding: 9px 11px; font-size: 14px; }
  .header-phone span { display: none; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .about-cards { flex-direction: row; }
  .about-cards .value-card { flex: 1; }
}

@media (max-width: 900px) {
  :root { --header-h: 66px; }

  /* 移动端菜单 */
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 18px var(--gutter) 26px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -30px rgba(10, 16, 32, 0.5);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease),
      visibility 0.28s var(--ease);
  }
  .nav.is-open { opacity: 1; transform: none; visibility: visible; }
  .nav a {
    padding: 13px 12px;
    font-size: 15.5px;
    color: var(--ink-2);
    border-radius: 10px;
  }
  .nav a::after { display: none; }
  .nav a:hover,
  .nav a.is-active { color: var(--brand); background: rgba(27, 77, 255, 0.06); }

  .nav-toggle { display: block; }
  .header-actions .header-phone { display: none; }
  .header-actions { margin-left: auto; }
  .header-actions .btn { display: none; }

  /* 布局 */
  .tech-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .process-list { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .about-cards { flex-direction: column; }

  .app-side { width: 88px; padding: 16px 10px; }
  .app-main { padding: 16px; }
  .app-kpis { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .app-kpi { padding: 10px; }
  .app-kpi-num { font-size: 17px; }
  .app-bars { height: 74px; gap: 5px; }

  .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .service-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px 4px; }
  .stat:nth-child(2)::after { display: none; }
  .stat:nth-child(-n + 2) { padding-bottom: 14px; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .hero-trust { flex-wrap: wrap; justify-content: center; }
}

@media (max-width: 560px) {
  .hero { padding-top: calc(var(--header-h) + 52px); }
  .hero-actions { flex-direction: column; align-self: stretch; }
  .hero-actions .btn { width: 100%; }
  .process-list { grid-template-columns: 1fr; }
  .app-side { display: none; }
  .app-bars i:nth-child(n + 9) { display: none; }
  .case-metrics strong { font-size: 16px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 10px; }
  .quote figcaption { flex-direction: column; text-align: center; }
}

/* ---------- 19. 无障碍 / 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

@media print {
  .site-header, .nav-toggle, .hero-bg, .hero-fade, .app-mock { display: none !important; }
  body { color: #000; }
  [data-reveal] { opacity: 1; transform: none; }
}