/* ==========================================================================
   江苏白猿网络科技有限公司 官网样式
   设计系统：科技蓝 / 白底 / 细网格 + 渐变点缀
   命名：BEM（block__element--modifier）
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 主色阶 */
  --c-primary: #1652f0;
  --c-primary-dark: #0d3bb8;
  --c-primary-light: #4b7bff;
  --c-primary-050: #eef3ff;
  --c-primary-100: #dbe5ff;

  /* 中性色 */
  --c-ink: #0d1b33;
  --c-ink-2: #33415c;
  --c-ink-3: #5c6b85;
  --c-ink-4: #8896ab;
  --c-line: #e4e9f2;
  --c-line-2: #eef1f7;
  --c-bg: #ffffff;
  --c-bg-soft: #f6f8fc;
  --c-bg-deep: #f0f4fb;

  /* 辅助色 */
  --c-cyan: #00c2d1;
  --c-amber: #ff9f1a;
  --c-green: #12b76a;

  /* 尺寸 */
  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;
  --shadow-s: 0 1px 2px rgba(13, 27, 51, .05), 0 4px 12px rgba(13, 27, 51, .04);
  --shadow-m: 0 6px 16px rgba(13, 27, 51, .07), 0 18px 48px rgba(13, 27, 51, .07);
  --shadow-blue: 0 10px 30px rgba(22, 82, 240, .22);

  --wrap: 1200px;
  --nav-h: 72px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink-2);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  color: var(--c-ink);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
}

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

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

::selection {
  background: var(--c-primary-100);
  color: var(--c-ink);
}

/* ---------- 3. 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  position: relative;
  padding: 96px 0;
}

.section--soft { background: var(--c-bg-soft); }

.section--grid-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(13, 27, 51, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(13, 27, 51, .045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 78%);
  pointer-events: none;
}

.section > .wrap { position: relative; z-index: 1; }

.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 4. 排版组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 5px 14px 5px 10px;
  border: 1px solid var(--c-primary-100);
  border-radius: 999px;
  background: var(--c-primary-050);
  color: var(--c-primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(22, 82, 240, .16);
}

.section-head {
  max-width: 720px;
  margin-bottom: 56px;
}

.section-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-title {
  font-size: clamp(26px, 3.1vw, 38px);
  letter-spacing: -.02em;
}

.section-desc {
  margin-top: 18px;
  font-size: 16.5px;
  color: var(--c-ink-3);
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease),
    background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.btn svg { width: 16px; height: 16px; }

.btn--primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: var(--shadow-blue);
}

.btn--primary:hover {
  background: var(--c-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(22, 82, 240, .3);
}

.btn--ghost {
  border: 1px solid var(--c-line);
  background: #fff;
  color: var(--c-ink);
}

.btn--ghost:hover {
  border-color: var(--c-primary-100);
  background: var(--c-primary-050);
  color: var(--c-primary);
  transform: translateY(-2px);
}

.btn--light {
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .28);
  color: #fff;
  backdrop-filter: blur(8px);
}

.btn--light:hover {
  background: rgba(255, 255, 255, .22);
  transform: translateY(-2px);
}

.btn--sm { height: 40px; padding: 0 20px; font-size: 14px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-primary);
  font-size: 14.5px;
  font-weight: 600;
}

.link-arrow svg { width: 15px; height: 15px; transition: transform .2s var(--ease); }
.link-arrow:hover svg { transform: translateX(4px); }

/* ---------- 6. 导航 ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, .78);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.nav.is-scrolled {
  border-bottom-color: var(--c-line);
  box-shadow: 0 1px 20px rgba(13, 27, 51, .05);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  width: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

.brand__mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(140deg, var(--c-primary-light), var(--c-primary) 52%, var(--c-primary-dark));
  box-shadow: 0 4px 14px rgba(22, 82, 240, .3);
  display: grid;
  place-items: center;
  color: #fff;
}

.brand__mark svg { width: 22px; height: 22px; }

.brand__text { display: flex; flex-direction: column; line-height: 1.2; }

.brand__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
  letter-spacing: .01em;
}

.brand__sub {
  font-size: 11px;
  font-weight: 500;
  color: var(--c-ink-4);
  letter-spacing: .16em;
  text-transform: uppercase;
}

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

.nav__link {
  position: relative;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-ink-2);
  transition: color .18s var(--ease), background-color .18s var(--ease);
}

.nav__link:hover { color: var(--c-primary); background: var(--c-primary-050); }

.nav__link.is-active { color: var(--c-primary); font-weight: 600; }

.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 1px;
  width: 16px;
  height: 2.5px;
  border-radius: 2px;
  background: var(--c-primary);
  transform: translateX(-50%);
}

.nav__cta { margin-left: 16px; }

.nav__toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--c-line);
  place-items: center;
}

.nav__toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--c-ink);
  border-radius: 2px;
  transform-origin: center;
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

/* 三横线口径：中线在 20px / 24px / 28px（间距 4px），
   首尾各平移 4px 即可与中线重合，形成标准 X */
.nav__toggle span + span { margin-top: 4px; }

.nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; transform: scaleX(.4); }
.nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 7. 首屏 ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 88px) 0 96px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 82% 8%, rgba(0, 194, 209, .12), transparent 62%),
    radial-gradient(ellipse 58% 55% at 12% 4%, rgba(22, 82, 240, .13), transparent 64%),
    linear-gradient(180deg, #fbfcff 0%, #ffffff 62%);
}

.hero__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(13, 27, 51, .04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(13, 27, 51, .04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 56px;
  align-items: center;
}

.hero__title {
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1.16;
  letter-spacing: -.028em;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(96deg, var(--c-primary) 8%, #2ea3ff 52%, var(--c-cyan) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__desc {
  margin-top: 24px;
  max-width: 540px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--c-ink-3);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--c-line-2);
}

.hero__meta-item { display: flex; flex-direction: column; gap: 2px; }

.hero__meta-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--c-ink);
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}

.hero__meta-num small { font-size: 13px; font-weight: 600; color: var(--c-ink-3); margin-left: 2px; }

.hero__meta-label { font-size: 12.5px; color: var(--c-ink-4); }

/* 首屏右侧视觉：产品矩阵卡 */
.hero__visual { position: relative; }

.hero__visual::after {
  content: "";
  position: absolute;
  inset: 8% -6% -8% 6%;
  background: linear-gradient(150deg, rgba(22, 82, 240, .16), rgba(0, 194, 209, .1));
  filter: blur(48px);
  border-radius: 40px;
  z-index: -1;
}

.panel {
  border: 1px solid var(--c-line);
  border-radius: var(--radius-l);
  background: #fff;
  box-shadow: var(--shadow-m);
  overflow: hidden;
}

.panel__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--c-line-2);
  background: linear-gradient(#fcfdff, #f7f9fd);
}

.panel__dot { width: 9px; height: 9px; border-radius: 50%; background: #dfe5ef; }
.panel__dot--r { background: #ffb3ad; }
.panel__dot--y { background: #ffd79a; }
.panel__dot--g { background: #a8e2bd; }

.panel__title {
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--c-ink-4);
  letter-spacing: .04em;
}

.panel__body { padding: 20px; }

.prod-row {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 11px 12px;
  border-radius: 11px;
  transition: background-color .18s var(--ease);
}

.prod-row + .prod-row { margin-top: 2px; }
.prod-row:hover { background: var(--c-bg-soft); }

.prod-row__icon {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
}

.prod-row__name { font-size: 14px; font-weight: 600; color: var(--c-ink); }
.prod-row__desc { font-size: 12px; color: var(--c-ink-4); line-height: 1.5; }

.prod-row__status {
  margin-left: auto;
  flex-shrink: 0;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  background: rgba(18, 183, 106, .1);
  color: #0b8f52;
}

.panel__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 20px;
  border-top: 1px solid var(--c-line-2);
  background: #fcfdff;
  font-size: 12px;
  color: var(--c-ink-4);
}

.panel__foot strong { color: var(--c-ink-2); font-variant-numeric: tabular-nums; }

/* 飘浮的小标签 */
.float-chip {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid var(--c-line);
  background: rgba(255, 255, 255, .92);
  box-shadow: var(--shadow-s);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--c-ink-2);
  animation: floatY 6s ease-in-out infinite;
}

.float-chip svg { width: 14px; height: 14px; color: var(--c-primary); }

/* 放在面板左下方外侧，避免遮挡标题栏 */
.float-chip--tl { bottom: 34px; left: -34px; }
.float-chip--br { top: -16px; right: -18px; animation-delay: -3s; }

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

/* ---------- 8. 客户/资质 Logo 带 */
.logos {
  padding: 30px 0;
  border-top: 1px solid var(--c-line-2);
  border-bottom: 1px solid var(--c-line-2);
  background: #fff;
}

.logos__inner {
  display: flex;
  align-items: center;
  gap: 40px;
  justify-content: space-between;
  flex-wrap: wrap;
}

.logos__label {
  font-size: 13px;
  font-weight: 500;
  color: var(--c-ink-4);
  white-space: nowrap;
}

.logos__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.logos__item {
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--c-line-2);
  background: var(--c-bg-soft);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-ink-3);
  letter-spacing: .01em;
}

/* ---------- 9. 卡片 ---------- */
.card {
  position: relative;
  padding: 30px 26px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: #fff;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--c-primary-100);
  box-shadow: var(--shadow-m);
}

.card__icon {
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--c-primary-050);
  color: var(--c-primary);
}

.card__icon svg { width: 23px; height: 23px; }

.card__title { font-size: 17.5px; margin-bottom: 10px; }
.card__text {
  font-size: 14.5px;
  color: var(--c-ink-3);
  line-height: 1.8;
}

.card__num {
  position: absolute;
  top: 22px;
  right: 24px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--c-ink-4);
  opacity: .5;
}

/* 服务卡：列表式服务 */
.svc-card {
  display: flex;
  flex-direction: column;
  padding: 32px 28px;
  border-radius: var(--radius-m);
  border: 1px solid var(--c-line);
  background: #fff;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}

.svc-card:hover {
  transform: translateY(-5px);
  border-color: var(--c-primary-100);
  box-shadow: var(--shadow-m);
}

.svc-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}

.svc-card__title { font-size: 19px; }

.svc-card__tag {
  flex-shrink: 0;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  color: var(--c-primary);
  background: var(--c-primary-050);
}

.svc-card__desc {
  font-size: 14.5px;
  color: var(--c-ink-3);
  margin-bottom: 20px;
}

.svc-card__list {
  display: grid;
  gap: 9px;
  margin-bottom: 24px;
  padding-bottom: 22px;
  border-bottom: 1px dashed var(--c-line);
  margin-top: auto;
}

.svc-card__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--c-ink-2);
}

.svc-card__list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: .68em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-primary-light);
}

/* ---------- 10. 数字统计 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.stat {
  padding: 32px 24px;
  background: #fff;
  text-align: center;
}

.stat__num {
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 700;
  color: var(--c-ink);
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.stat__num span { color: var(--c-primary); }
.stat__label { margin-top: 8px; font-size: 13px; color: var(--c-ink-4); }

/* ---------- 11. 案例 ---------- */
.case-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: #fff;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-m);
  border-color: var(--c-primary-100);
}

.case-card__cover {
  position: relative;
  height: 152px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}

.case-card__cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, .1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, .1) 1px, transparent 1px);
  background-size: 28px 28px;
}

.case-card__cover--a { background: linear-gradient(135deg, #1652f0, #0b2f9e); }
.case-card__cover--b { background: linear-gradient(135deg, #0d8fa8, #12626f); }
.case-card__cover--c { background: linear-gradient(135deg, #3d55c8, #1b2a6b); }
.case-card__cover--d { background: linear-gradient(135deg, #1a6fd4, #0f3d7a); }

.case-card__badge {
  position: relative;
  z-index: 1;
  align-self: flex-start;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .18);
  border: 1px solid rgba(255, 255, 255, .26);
  color: #fff;
  font-size: 11.5px;
  font-weight: 600;
  backdrop-filter: blur(4px);
}

.case-card__domain {
  position: relative;
  z-index: 1;
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 600;
  color: #fff;
  letter-spacing: -.01em;
}

.case-card__body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.case-card__title { font-size: 17px; margin-bottom: 8px; }
.case-card__text { font-size: 14px; color: var(--c-ink-3); margin-bottom: 18px; }

.case-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.tag {
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line-2);
  font-size: 12px;
  color: var(--c-ink-3);
}

/* ---------- 12. 流程时间轴 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
  position: relative;
}

.step { position: relative; padding-top: 46px; }

.step::before {
  content: "";
  position: absolute;
  top: 15px;
  left: 0;
  right: -20px;
  height: 1px;
  background: linear-gradient(90deg, var(--c-primary-100), var(--c-line));
}

.step:last-child::before { display: none; }

.step__dot {
  position: absolute;
  top: 6px;
  left: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--c-primary);
  display: grid;
  place-items: center;
  font-size: 10px;
  font-weight: 700;
  color: var(--c-primary);
  box-shadow: 0 0 0 4px rgba(22, 82, 240, .09);
}

.step__title { font-size: 16px; margin-bottom: 8px; }
.step__text { font-size: 13.5px; color: var(--c-ink-3); line-height: 1.75; }

/* ---------- 13. 优势（左文右图） ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-list { display: grid; gap: 22px; margin-top: 34px; }

.feature {
  display: flex;
  gap: 16px;
  padding: 18px 20px;
  border-radius: var(--radius-m);
  border: 1px solid transparent;
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}

.feature:hover { background: #fff; border-color: var(--c-line); box-shadow: var(--shadow-s); }

.feature__idx {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--c-primary-050);
  color: var(--c-primary);
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
}

.feature__title { font-size: 15.5px; margin-bottom: 6px; }
.feature__text { font-size: 14px; color: var(--c-ink-3); line-height: 1.75; }

/* 架构示意 */
.arch {
  padding: 26px;
  border-radius: var(--radius-l);
  border: 1px solid var(--c-line);
  background:
    radial-gradient(ellipse 70% 60% at 100% 0%, rgba(0, 194, 209, .08), transparent 60%),
    #fff;
  box-shadow: var(--shadow-m);
}

.arch__layer {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 11px;
  border: 1px solid var(--c-line-2);
  background: var(--c-bg-soft);
}

.arch__layer + .arch__layer { margin-top: 10px; }

.arch__layer--hl {
  background: linear-gradient(100deg, var(--c-primary), #2f74ff);
  border-color: transparent;
  box-shadow: 0 8px 22px rgba(22, 82, 240, .26);
}

.arch__layer--hl .arch__label { color: #fff; }
.arch__layer--hl .arch__chips span { background: rgba(255, 255, 255, .18); border-color: rgba(255, 255, 255, .22); color: #fff; }

.arch__label {
  flex-shrink: 0;
  width: 62px;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-ink-3);
  letter-spacing: .04em;
}

.arch__chips { display: flex; flex-wrap: wrap; gap: 6px; }

.arch__chips span {
  padding: 3px 9px;
  border-radius: 6px;
  border: 1px solid var(--c-line-2);
  background: #fff;
  font-size: 11.5px;
  color: var(--c-ink-2);
}

.arch__foot {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--c-line);
  font-size: 12.5px;
  color: var(--c-ink-4);
  text-align: center;
}

/* ---------- 14. CTA 深色块 */
.cta {
  position: relative;
  overflow: hidden;
  padding: 76px 0;
  background: linear-gradient(118deg, #0a1f4d 0%, #1652f0 62%, #1976e8 100%);
  color: #fff;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, .07) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 50%, #000, transparent 75%);
}

.cta__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta__title { color: #fff; font-size: clamp(24px, 2.6vw, 34px); }
.cta__desc { margin-top: 14px; color: rgba(255, 255, 255, .76); font-size: 16px; max-width: 560px; }
.cta__actions { display: flex; gap: 12px; flex-shrink: 0; }

/* ---------- 15. 页脚 ---------- */
.footer {
  padding: 68px 0 0;
  background: #08152e;
  color: rgba(255, 255, 255, .66);
  font-size: 14px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 52px;
}

.footer .brand__name { color: #fff; }
.footer .brand__sub { color: rgba(255, 255, 255, .38); }

.footer__desc {
  margin-top: 18px;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, .52);
  max-width: 300px;
}

.footer__title {
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  letter-spacing: .05em;
}

.footer__list { display: grid; gap: 10px; }

.footer__list a,
.footer__list span {
  font-size: 13.5px;
  color: rgba(255, 255, 255, .6);
  transition: color .18s var(--ease);
  word-break: break-all;
}

.footer__list a:hover { color: #fff; }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 22px 0 26px;
  border-top: 1px solid rgba(255, 255, 255, .09);
  font-size: 12.5px;
  color: rgba(255, 255, 255, .44);
}

.footer__bottom a { color: rgba(255, 255, 255, .58); }
.footer__bottom a:hover { color: #fff; }

.footer__links { display: flex; flex-wrap: wrap; gap: 18px; }

/* ---------- 16. 页内 hero（子页） ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 72px) 0 72px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 50% 70% at 78% 20%, rgba(0, 194, 209, .1), transparent 60%),
    radial-gradient(ellipse 60% 70% at 15% 0%, rgba(22, 82, 240, .1), transparent 62%),
    linear-gradient(180deg, #fafbff, #fff);
  border-bottom: 1px solid var(--c-line-2);
}

.page-hero__title { font-size: clamp(28px, 3.6vw, 44px); letter-spacing: -.025em; }
.page-hero__desc { margin-top: 18px; max-width: 680px; font-size: 16.5px; color: var(--c-ink-3); }

.crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 13px;
  color: var(--c-ink-4);
}

.crumb a:hover { color: var(--c-primary); }
.crumb span { opacity: .5; }

/* ---------- 17. 关于页时间轴 ---------- */
.timeline { position: relative; padding-left: 30px; }

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-primary), var(--c-primary-100) 70%, transparent);
}

.tl-item { position: relative; padding-bottom: 34px; }
.tl-item:last-child { padding-bottom: 0; }

.tl-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--c-primary);
  box-shadow: 0 0 0 4px rgba(22, 82, 240, .08);
}

.tl-item__year {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
  letter-spacing: .02em;
}

.tl-item__title { font-size: 16.5px; margin: 6px 0 6px; }
.tl-item__text { font-size: 14px; color: var(--c-ink-3); }

/* 信息表 */
.info-table { width: 100%; border-collapse: collapse; font-size: 14px; }

.info-table caption {
  text-align: left;
  font-size: 13px;
  color: var(--c-ink-4);
  padding-bottom: 12px;
}

.info-table th,
.info-table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--c-line-2);
  text-align: left;
  vertical-align: top;
}

.info-table th {
  width: 148px;
  font-weight: 600;
  color: var(--c-ink-2);
  background: var(--c-bg-soft);
  white-space: nowrap;
}

.info-table td { color: var(--c-ink-3); }
.info-table tr:last-child th,
.info-table tr:last-child td { border-bottom: 0; }

/* ---------- 18. 表单 ---------- */
.form { display: grid; gap: 18px; }

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

.field { display: grid; gap: 7px; }

.field__label { font-size: 13.5px; font-weight: 600; color: var(--c-ink-2); }

.field__req { color: #e5484d; margin-left: 2px; }

.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--c-line);
  border-radius: 10px;
  background: #fff;
  font-family: inherit;
  font-size: 14.5px;
  color: var(--c-ink);
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
  appearance: none;
}

.field textarea { min-height: 120px; resize: vertical; }

/* 自定义下拉箭头（appearance:none 后需补） */
.field select {
  padding-right: 38px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%235c6b85' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
}

.field input::placeholder,
.field textarea::placeholder { color: var(--c-ink-4); }

.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--c-primary-light);
  box-shadow: 0 0 0 3px rgba(22, 82, 240, .12);
}

.form__note { font-size: 12.5px; color: var(--c-ink-4); }
.form__tip { font-size: 13px; color: var(--c-green); min-height: 20px; }

/* ---------- 19. 联系信quarter ---------- */
.contact-card {
  display: flex;
  gap: 16px;
  padding: 22px;
  border-radius: var(--radius-m);
  border: 1px solid var(--c-line);
  background: #fff;
}

.contact-card__icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--c-primary-050);
  color: var(--c-primary);
}

.contact-card__icon svg { width: 19px; height: 19px; }
.contact-card__label { font-size: 12.5px; color: var(--c-ink-4); margin-bottom: 3px; }
.contact-card__value { font-size: 15px; font-weight: 600; color: var(--c-ink); word-break: break-all; }
.contact-card__value--sm { font-size: 14px; font-weight: 500; color: var(--c-ink-2); line-height: 1.7; }

/* ---------- 20. 滚动淡入 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
  will-change: opacity, transform;
}

[data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .float-chip { animation: none; }
}

/* ---------- 21. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero__inner { grid-template-columns: 1fr; gap: 48px; }
  .hero__desc { max-width: 100%; }
  .float-chip--tl { left: 0; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px 20px; }
  .step::before { display: none; }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 860px) {
  :root { --nav-h: 64px; }

  .section { padding: 68px 0; }
  .wrap { padding: 0 20px; }

  .nav__toggle { display: grid; }
  .nav__cta { display: none; }

  .nav__menu {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    display: block;
    padding: 10px 20px 22px;
    background: #fff;
    border-bottom: 1px solid var(--c-line);
    box-shadow: 0 12px 28px rgba(13, 27, 51, .08);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
  }

  .nav.is-open .nav__menu { opacity: 1; transform: none; visibility: visible; }

  .nav__link { display: block; padding: 12px 8px; font-size: 15.5px; }
  .nav__link.is-active::after { left: 8px; transform: none; bottom: 8px; }

  .hero { padding: calc(var(--nav-h) + 56px) 0 64px; }
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .cta__inner { flex-direction: column; align-items: flex-start; gap: 28px; }
  .cta { padding: 56px 0; }
  .page-hero { padding: calc(var(--nav-h) + 48px) 0 52px; }
  .form__row { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .brand__sub { display: none; }
  .hero__meta { gap: 18px 24px; }
}

@media (max-width: 480px) {
  .hero__actions .btn { width: 100%; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat { padding: 22px 12px; }
  .float-chip { display: none; }
}

/* ---------- 22. 打印 ---------- */
@media print {
  .nav, .cta, .float-chip { display: none; }
  body { color: #000; }
  .card, .panel, .arch { box-shadow: none; }
}

/* ---------- 23. 工具类 ---------- */
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.mb-0 { margin-bottom: 0 !important; }
.center { text-align: center; }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
/* ---------- 24. 位置示意图 ---------- */
.map-box {
  overflow: hidden;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-l);
  background: #fff;
  box-shadow: var(--shadow-s);
}

.map-box > svg {
  display: block;
  width: 100%;
  height: 320px;
}

.map-box__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  border-top: 1px solid var(--c-line-2);
  background: #fcfdff;
  font-size: 12.5px;
  color: var(--c-ink-4);
}

@media (max-width: 860px) {
  .map-box > svg { height: 240px; }
}

/* ---------- 25. 图片 ---------- */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-l);
  background: var(--c-bg-deep);
}

.figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .6s var(--ease);
}

.figure:hover img { transform: scale(1.02); }

.figure--tall img { aspect-ratio: 4 / 5; }
.figure--wide img { aspect-ratio: 16 / 10; }
.figure--sq img { aspect-ratio: 1 / 1; }

.figure__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 44px 20px 16px;
  background: linear-gradient(to top, rgba(8, 21, 46, .78), transparent);
  color: rgba(255, 255, 255, .92);
  font-size: 12.5px;
  line-height: 1.6;
}

/* 首屏右侧：照片 + 浮层卡片 */
.hero__shot {
  position: relative;
  border-radius: var(--radius-l);
  overflow: hidden;
  box-shadow: var(--shadow-m);
  border: 1px solid var(--c-line);
}

.hero__shot img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  max-height: 420px;
  object-fit: cover;
  object-position: center 32%;
}

.hero__shot-tag {
  position: absolute;
  left: 14px;
  top: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .93);
  backdrop-filter: blur(10px);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--c-ink);
  box-shadow: var(--shadow-s);
}

.hero__shot-tag i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 0 3px rgba(18, 183, 106, .18);
}

/* 案例卡封面用真实照片 */
.case-card__cover--photo { padding: 0; }
.case-card__cover--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .5s var(--ease);
}
.case-card:hover .case-card__cover--photo img { transform: scale(1.04); }
.case-card__cover--photo::after {
  background: linear-gradient(to top, rgba(8, 21, 46, .62), transparent 62%);
  background-size: auto;
}
.case-card__cover--photo .case-card__badge,
.case-card__cover--photo .case-card__domain { z-index: 2; }

/* 关于页团队照 */
.about-shot {
  overflow: hidden;
  border-radius: var(--radius-l);
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow-m);
  line-height: 0;
}

.about-shot img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}

/* 服务卡顶部小图 */
.svc-thumb {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 148px;
  overflow: hidden;
  border-radius: var(--radius-m) var(--radius-m) 0 0;
}

/* 卡片有图时整体上推，图片占满顶部通栏 */
.card:has(.svc-thumb) {
  padding-top: 178px;
  overflow: hidden;
}

.svc-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .5s var(--ease);
}

.svc-card:hover .svc-thumb img { transform: scale(1.05); }

@media (max-width: 860px) {
  .figure--wide img,
  .about-shot img { aspect-ratio: 4 / 3; }
  .hero__shot img { aspect-ratio: 4 / 3; }
}