/* ==========================================================================
   周口鲲鹏文芯智能科技有限公司 — 官网设计系统
   风格：简约大气 · AI 科技感
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 背景层次 */
  --bg-base: #05070f;
  --bg-elevated: #0a0e1c;
  --bg-card: rgba(255, 255, 255, 0.028);
  --bg-card-hover: rgba(255, 255, 255, 0.055);
  --bg-glass: rgba(8, 11, 22, 0.72);

  /* 描边 */
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);

  /* 文字 */
  --text: #eaeef7;
  --text-soft: #a8b1c6;
  --text-dim: #6d7794;

  /* 主题色 */
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --violet: #8b5cf6;
  --accent: #38bdf8;
  --grad: linear-gradient(120deg, #22d3ee 0%, #3b82f6 48%, #8b5cf6 100%);
  --grad-soft: linear-gradient(120deg, rgba(34, 211, 238, 0.16), rgba(139, 92, 246, 0.16));

  /* 尺度 */
  --maxw: 1200px;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;

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

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 700; line-height: 1.3; letter-spacing: -0.01em; }
p { margin: 0; }
button, input, textarea, select { font: inherit; color: inherit; }

::selection { background: rgba(56, 189, 248, 0.3); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #05070f; }
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  border: 2px solid #05070f;
}
::-webkit-scrollbar-thumb:hover { background: rgba(56, 189, 248, 0.4); }

/* ---------- 3. 全局背景光效 ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(760px 520px at 12% -6%, rgba(59, 130, 246, 0.15), transparent 62%),
    radial-gradient(680px 480px at 92% 4%, rgba(139, 92, 246, 0.13), transparent 60%),
    radial-gradient(900px 700px at 50% 108%, rgba(34, 211, 238, 0.08), transparent 65%);
}

/* 网格纹理 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.42;
  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: 64px 64px;
  mask-image: radial-gradient(circle at 50% 26%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 26%, #000 0%, transparent 78%);
}

/* ---------- 4. 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
  position: relative;
  z-index: 1;
}

.section { padding: 104px 0; position: relative; z-index: 1; }
.section--tight { padding: 72px 0; }
.section--alt { background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.018), transparent); }

.divider {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
}

/* ---------- 5. 排版组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--text-soft);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head--center { margin-inline: auto; text-align: center; }

.section-title {
  font-size: clamp(28px, 3.6vw, 44px);
  margin: 20px 0 16px;
  letter-spacing: -0.02em;
}

.section-sub {
  color: var(--text-soft);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
}

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

.lead { font-size: 18px; color: var(--text-soft); line-height: 1.9; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.btn svg { width: 17px; height: 17px; flex: none; }

.btn--primary {
  background: var(--grad);
  color: #04070f;
  box-shadow: 0 10px 34px rgba(56, 189, 248, 0.26);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 44px rgba(56, 189, 248, 0.4);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-strong);
  color: var(--text);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(56, 189, 248, 0.5);
  transform: translateY(-2px);
}

.btn--lg { padding: 16px 34px; font-size: 16px; }

/* ---------- 7. 导航 ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease),
    backdrop-filter 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom-color: var(--border);
}

.nav__inner {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark {
  width: 40px;
  height: 40px;
  flex: none;
  border-radius: 11px;
  background: var(--grad);
  display: grid;
  place-items: center;
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.3);
}
.brand__mark svg { width: 22px; height: 22px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__name { font-size: 16px; font-weight: 700; letter-spacing: 0.02em; }
.brand__en { font-size: 10.5px; color: var(--text-dim); letter-spacing: 0.2em; text-transform: uppercase; }

.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 15px;
  color: var(--text-soft);
  transition: color 0.25s, background 0.25s;
}
.nav__link:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.nav__link.is-active { color: var(--text); }
.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  transform: translateX(-50%);
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
}

.nav__cta { display: flex; align-items: center; gap: 12px; }
.nav__phone {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-soft);
  font-variant-numeric: tabular-nums;
}
.nav__phone svg { width: 15px; height: 15px; color: var(--cyan); }

.nav__toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  place-items: center;
}
.nav__toggle span {
  display: block;
  width: 18px;
  height: 1.6px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s;
}
.nav__toggle span + span { margin-top: 4.5px; }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(6.1px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-6.1px) rotate(-45deg); }

.nav__mobile {
  display: none;
  border-top: 1px solid var(--border);
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  padding: 14px 0 22px;
}
.nav__mobile.is-open { display: block; animation: fadeDown 0.3s var(--ease); }
.nav__mobile a {
  display: block;
  padding: 13px 4px;
  font-size: 16px;
  color: var(--text-soft);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.nav__mobile a.is-active { color: var(--cyan); }
.nav__mobile .btn { width: 100%; margin-top: 18px; }

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 8. Hero ---------- */
.hero {
  position: relative;
  padding: 168px 0 96px;
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 56px;
  align-items: center;
}
.hero__title {
  font-size: clamp(34px, 5.2vw, 62px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 24px 0 22px;
}
.hero__desc {
  color: var(--text-soft);
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.9;
  max-width: 560px;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero__tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 36px; }
.tag {
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  font-size: 13.5px;
  color: var(--text-soft);
}

/* Hero 可视化 */
.hero__visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 520px;
  margin-inline: auto;
  width: 100%;
}
.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hero__orbit {
  position: absolute;
  inset: 8%;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 50%;
}
.hero__orbit:nth-of-type(2) { inset: 22%; border-color: rgba(34, 211, 238, 0.13); }
.hero__orbit:nth-of-type(3) { inset: 36%; border-color: rgba(139, 92, 246, 0.14); }
.hero__core {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 132px;
  height: 132px;
  border-radius: 50%;
  background: var(--grad);
  display: grid;
  place-items: center;
  text-align: center;
  box-shadow: 0 0 70px rgba(56, 189, 248, 0.45), inset 0 0 30px rgba(255, 255, 255, 0.2);
  animation: corePulse 4s ease-in-out infinite;
}
.hero__core span {
  font-size: 14px;
  font-weight: 700;
  color: #04070f;
  letter-spacing: 0.08em;
  line-height: 1.5;
}
@keyframes corePulse {
  0%, 100% { box-shadow: 0 0 70px rgba(56, 189, 248, 0.45), inset 0 0 30px rgba(255, 255, 255, 0.2); }
  50% { box-shadow: 0 0 110px rgba(139, 92, 246, 0.55), inset 0 0 30px rgba(255, 255, 255, 0.28); }
}

.hero__chip {
  position: absolute;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: rgba(10, 14, 28, 0.85);
  backdrop-filter: blur(10px);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  animation: floatY 6s ease-in-out infinite;
}
.hero__chip--1 { top: 6%; left: 2%; color: var(--cyan); }
.hero__chip--2 { top: 44%; right: -2%; color: var(--accent); animation-delay: -2s; }
.hero__chip--3 { bottom: 8%; left: 10%; color: #c4b5fd; animation-delay: -4s; }
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-13px); }
}

/* ---------- 9. 指标条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat { background: var(--bg-elevated); padding: 32px 26px; text-align: center; }
.stat__num {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat__label { color: var(--text-dim); font-size: 14px; margin-top: 6px; }

/* ---------- 10. 卡片 ---------- */
.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative;
  padding: 32px 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  overflow: hidden;
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease),
    background 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.55), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}
.card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.45);
}
.card:hover::before { opacity: 1; }

.card__icon {
  width: 50px;
  height: 50px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  margin-bottom: 20px;
  color: var(--cyan);
}
.card__icon svg { width: 24px; height: 24px; }

.card__title { font-size: 19px; margin-bottom: 10px; }
.card__text { color: var(--text-soft); font-size: 14.5px; line-height: 1.85; }

.card__list { margin-top: 18px; display: grid; gap: 9px; }
.card__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--text-soft);
}
.card__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grad);
}

.card__num {
  position: absolute;
  right: 22px;
  top: 18px;
  font-size: 46px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.045);
  letter-spacing: -0.03em;
}

/* 大号业务卡 */
.card--feature { padding: 38px 34px; }
.card--feature .card__title { font-size: 22px; }

/* 链接箭头 */
.card__more {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 22px;
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan);
  transition: gap 0.3s var(--ease);
}
.card__more svg { width: 15px; height: 15px; }
.card:hover .card__more { gap: 12px; }

/* ---------- 11. 流程时间轴 ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.flow::before {
  content: "";
  position: absolute;
  left: 6%;
  right: 6%;
  top: 27px;
  height: 1px;
  background: linear-gradient(90deg, rgba(34, 211, 238, 0.5), rgba(139, 92, 246, 0.5));
}
.flow__item { position: relative; text-align: center; padding: 0 8px; }
.flow__dot {
  width: 54px;
  height: 54px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  font-weight: 800;
  font-size: 17px;
  color: var(--cyan);
  position: relative;
  z-index: 1;
}
.flow__title { font-size: 17px; margin-bottom: 8px; }
.flow__text { font-size: 14px; color: var(--text-soft); line-height: 1.8; }

/* ---------- 12. 服务详情块 ---------- */
.service {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 52px;
  align-items: center;
  padding: 64px 0;
}
.service + .service { border-top: 1px solid var(--border); }
.service--rev .service__media { order: -1; }

.service__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px;
  border-radius: 999px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 600;
  color: var(--cyan);
  margin-bottom: 18px;
}
.service__title { font-size: clamp(24px, 3vw, 34px); margin-bottom: 16px; letter-spacing: -0.02em; }
.service__desc { color: var(--text-soft); line-height: 1.9; font-size: 15.5px; }

.service__points { margin-top: 26px; display: grid; gap: 14px; }
.point { display: flex; gap: 13px; align-items: flex-start; }
.point__ic {
  width: 22px;
  height: 22px;
  flex: none;
  margin-top: 3px;
  border-radius: 6px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--cyan);
}
.point__ic svg { width: 12px; height: 12px; }
.point strong { display: block; font-size: 15px; margin-bottom: 3px; }
.point span { font-size: 14px; color: var(--text-soft); line-height: 1.8; }

.service__media {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012));
  padding: 30px;
  position: relative;
  overflow: hidden;
}
.service__media::after {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  right: -80px;
  top: -80px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.16), transparent 70%);
}

/* 交付物清单 */
.deliver { display: grid; gap: 12px; position: relative; z-index: 1; }
.deliver__head {
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.deliver__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(5, 7, 15, 0.55);
  font-size: 14.5px;
  transition: border-color 0.3s, transform 0.3s var(--ease);
}
.deliver__row:hover { border-color: rgba(56, 189, 248, 0.4); transform: translateX(4px); }
.deliver__row b { font-weight: 600; }
.deliver__row em {
  font-style: normal;
  font-size: 12.5px;
  color: var(--cyan);
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.24);
  white-space: nowrap;
}

/* ---------- 13. 表格 ---------- */
.table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
  background: var(--bg-card);
}
table { width: 100%; border-collapse: collapse; min-width: 680px; }
th, td { padding: 17px 20px; text-align: left; font-size: 14.5px; }
thead th {
  background: rgba(255, 255, 255, 0.045);
  font-size: 13.5px;
  letter-spacing: 0.06em;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
tbody tr + tr { border-top: 1px solid rgba(255, 255, 255, 0.055); }
tbody td { color: var(--text-soft); vertical-align: top; }
tbody td:first-child { color: var(--text); font-weight: 600; }
tbody tr:hover { background: rgba(255, 255, 255, 0.022); }

/* ---------- 14. 手风琴 FAQ ---------- */
.faq { display: grid; gap: 12px; }
.faq__item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq__item.is-open { border-color: rgba(56, 189, 248, 0.36); }
.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 19px 22px;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
}
.faq__q svg { width: 18px; height: 18px; flex: none; color: var(--cyan); transition: transform 0.35s var(--ease); }
.faq__item.is-open .faq__q svg { transform: rotate(45deg); }
.faq__a { max-height: 0; overflow: hidden; transition: max-height 0.4s var(--ease); }
.faq__a p { padding: 0 22px 22px; color: var(--text-soft); font-size: 14.5px; line-height: 1.9; }

/* ---------- 15. 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 32px; align-items: start; }

.contact-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 30px 28px;
  display: grid;
  gap: 22px;
}
.contact-item { display: flex; gap: 15px; align-items: flex-start; }
.contact-item__ic {
  width: 42px;
  height: 42px;
  flex: none;
  border-radius: 11px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--cyan);
}
.contact-item__ic svg { width: 19px; height: 19px; }
.contact-item__label { font-size: 13px; color: var(--text-dim); letter-spacing: 0.08em; }
.contact-item__value { font-size: 16.5px; font-weight: 600; margin-top: 2px; word-break: break-all; }
.contact-item__value a:hover { color: var(--cyan); }
.contact-item__note { font-size: 13px; color: var(--text-dim); margin-top: 3px; }

.form {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 34px 32px;
}
.form__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: grid; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 14px; color: var(--text-soft); }
.field label span { color: #f87171; }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 15px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(5, 7, 15, 0.6);
  font-size: 15px;
  transition: border-color 0.25s, box-shadow 0.25s;
  outline: none;
}
.field textarea { resize: vertical; min-height: 122px; line-height: 1.8; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: rgba(56, 189, 248, 0.6);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
}
.field input::placeholder, .field textarea::placeholder { color: #56607c; }
.field select option { background: #0a0e1c; }

.form__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 24px;
}
.form__tip { font-size: 13px; color: var(--text-dim); }

.form__msg {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(34, 211, 238, 0.35);
  background: rgba(34, 211, 238, 0.08);
  color: var(--cyan);
  font-size: 14.5px;
}
.form__msg.is-show { display: block; animation: fadeDown 0.35s var(--ease); }
.form__msg.is-ok {
  color: #34d399;
  border: 1px solid rgba(52, 211, 153, 0.45);
  background: rgba(52, 211, 153, 0.08);
}

/* ---------- 16. CTA ---------- */
.cta {
  position: relative;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.1), rgba(139, 92, 246, 0.1));
  padding: 62px 48px;
  text-align: center;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  inset: -50% -10% auto -10%;
  height: 200%;
  background: radial-gradient(circle at 50% 30%, rgba(56, 189, 248, 0.18), transparent 55%);
  pointer-events: none;
}
.cta__title { font-size: clamp(24px, 3.2vw, 38px); margin-bottom: 16px; letter-spacing: -0.02em; }
.cta__text { color: var(--text-soft); max-width: 620px; margin: 0 auto 32px; line-height: 1.9; }
.cta__actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- 17. 页脚 ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: rgba(5, 7, 15, 0.6);
  padding: 62px 0 28px;
  position: relative;
  z-index: 1;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer__desc { color: var(--text-soft); font-size: 14px; line-height: 1.9; margin-top: 18px; max-width: 320px; }
.footer__h { font-size: 15px; margin-bottom: 18px; }
.footer__list { display: grid; gap: 11px; }
.footer__list a, .footer__list li { font-size: 14px; color: var(--text-soft); transition: color 0.25s; }
.footer__list a:hover { color: var(--cyan); }
.footer__bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13.5px;
  color: var(--text-dim);
}
.footer__bottom a:hover { color: var(--text-soft); }

/* ---------- 18. 页面头部（内页） ---------- */
.pagehead {
  padding: 158px 0 68px;
  text-align: center;
  position: relative;
}
.pagehead__title {
  font-size: clamp(30px, 4.4vw, 52px);
  margin: 22px 0 18px;
  letter-spacing: -0.03em;
}
.pagehead__sub { color: var(--text-soft); max-width: 700px; margin: 0 auto; line-height: 1.9; font-size: 16.5px; }
.crumb { font-size: 13.5px; color: var(--text-dim); margin-top: 26px; }
.crumb a:hover { color: var(--cyan); }

/* ---------- 19. 滚动动画 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition-duration: 0.01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 20. 回到顶部 ---------- */
.totop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  display: grid;
  place-items: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.35s var(--ease);
  color: var(--text);
}
.totop.is-show { opacity: 1; visibility: visible; transform: none; }
.totop:hover { border-color: rgba(56, 189, 248, 0.55); color: var(--cyan); }
.totop svg { width: 18px; height: 18px; }

/* ---------- 21. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 960px) {
  .nav__links, .nav__phone { display: none; }
  .nav__toggle { display: grid; }
  .hero { padding: 132px 0 72px; }
  .hero__grid { grid-template-columns: 1fr; gap: 48px; }
  .hero__visual { max-width: 400px; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .service { grid-template-columns: 1fr; gap: 34px; padding: 48px 0; }
  .service--rev .service__media { order: 0; }
  .flow { grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .flow::before { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .container { padding-inline: 18px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .form { padding: 26px 20px; }
  .form__grid { grid-template-columns: 1fr; }
  .cta { padding: 44px 24px; }
  .pagehead { padding: 128px 0 52px; }
  .card { padding: 26px 22px; }
  .hero__chip { font-size: 12px; padding: 7px 12px; }
  .btn { width: 100%; }
  .hero__actions .btn, .cta__actions .btn { flex: 1 1 100%; }
  .nav__cta .btn { width: auto; }
}