/* ==========================================================================
   太原市富汇昌科技有限公司 · 官网样式
   深色科技风 / 零依赖 / 响应式
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --bg: #070B14;
  --bg-soft: #0A101D;
  --bg-deep: #050810;
  --card: #0E1524;
  --card-hover: #131D30;
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.14);

  --text: #E8EEF9;
  --text-2: #A3B0C6;
  --text-3: #6A778E;

  --brand: #2E7BFF;
  --brand-light: #6BA3FF;
  --brand-dim: rgba(46, 123, 255, 0.14);
  --accent: #00E5C0;
  --accent-dim: rgba(0, 229, 192, 0.12);

  --radius: 14px;
  --radius-lg: 20px;

  --container: 1180px;
  --nav-h: 68px;

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

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

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

/* 全局网格底纹 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 78%);
  pointer-events: none;
  z-index: 0;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

::selection {
  background: rgba(46, 123, 255, 0.35);
  color: #fff;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
  background: #1D2942;
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: #2A3A5C;
}

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 108px 0;
  position: relative;
}

.section--tight {
  padding: 76px 0;
}

.section--alt {
  background: linear-gradient(180deg, transparent, var(--bg-soft) 18%, var(--bg-soft) 82%, transparent);
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  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: rgba(7, 11, 20, 0.82);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom-color: var(--line);
}

.nav__inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

.logo__mark {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.04em;
}

.logo__sub {
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-family: var(--mono);
}

/* 导航菜单 */
.nav__menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__link {
  position: relative;
  padding: 8px 15px;
  font-size: 14.5px;
  color: var(--text-2);
  border-radius: 8px;
  transition: color 0.24s var(--ease), background 0.24s var(--ease);
}

.nav__link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.nav__link.is-active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
}

.nav__cta {
  margin-left: 10px;
}

/* 汉堡按钮 */
.nav__toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  cursor: pointer;
  padding: 0;
}

.nav__toggle span {
  display: block;
  width: 17px;
  height: 1.5px;
  background: var(--text);
  position: relative;
  transition: background 0.2s;
}

.nav__toggle span::before,
.nav__toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 17px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.3s var(--ease);
}

.nav__toggle span::before {
  top: -6px;
}
.nav__toggle span::after {
  top: 6px;
}

.nav.is-open .nav__toggle span {
  background: transparent;
}
.nav.is-open .nav__toggle span::before {
  transform: translateY(6px) rotate(45deg);
}
.nav.is-open .nav__toggle span::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 500;
  font-family: inherit;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.24s var(--ease), background 0.24s var(--ease),
    border-color 0.24s var(--ease), box-shadow 0.24s var(--ease), color 0.24s var(--ease);
  white-space: nowrap;
  line-height: 1.4;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: linear-gradient(135deg, var(--brand), #1F5FD8);
  color: #fff;
  box-shadow: 0 8px 24px -8px rgba(46, 123, 255, 0.6),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.btn--primary:hover {
  box-shadow: 0 12px 32px -8px rgba(46, 123, 255, 0.75),
    inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--line-strong);
  color: var(--text);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.24);
}

.btn--sm {
  padding: 9px 18px;
  font-size: 14px;
  border-radius: 8px;
}

.btn--block {
  width: 100%;
}

/* ---------- 首屏 Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 96px) 0 104px;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  top: -280px;
  left: 50%;
  transform: translateX(-50%);
  width: 1100px;
  height: 720px;
  background: radial-gradient(circle at 50% 50%, rgba(46, 123, 255, 0.18), transparent 62%),
    radial-gradient(circle at 62% 42%, rgba(0, 229, 192, 0.1), transparent 55%);
  pointer-events: none;
  z-index: 0;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 64px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 14px 6px 10px;
  border-radius: 100px;
  border: 1px solid rgba(46, 123, 255, 0.28);
  background: rgba(46, 123, 255, 0.08);
  font-size: 12.5px;
  color: var(--brand-light);
  letter-spacing: 0.04em;
  margin-bottom: 26px;
}

.eyebrow__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 229, 192, 0.16);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.55;
    transform: scale(0.82);
  }
}

.hero__title {
  font-size: clamp(34px, 4.2vw, 54px);
  line-height: 1.24;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.015em;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(100deg, var(--brand-light) 8%, var(--accent) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__desc {
  margin-top: 24px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text-2);
  max-width: 540px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 52px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.hero__meta-item {
  padding-right: 34px;
  margin-right: 34px;
  border-right: 1px solid var(--line);
}

.hero__meta-item:last-child {
  border-right: 0;
  margin-right: 0;
  padding-right: 0;
}

.hero__meta-key {
  display: block;
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.hero__meta-val {
  display: block;
  font-size: 15.5px;
  color: var(--text);
  font-weight: 500;
}

/* 首屏右侧视觉 */
.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__visual svg {
  width: 100%;
  height: auto;
  max-width: 480px;
}

.node-pulse {
  animation: nodeBreath 3.6s ease-in-out infinite;
  transform-origin: center;
}

.node-pulse:nth-child(2n) {
  animation-delay: 0.8s;
}

.node-pulse:nth-child(3n) {
  animation-delay: 1.6s;
}

@keyframes nodeBreath {
  0%,
  100% {
    opacity: 0.45;
  }
  50% {
    opacity: 1;
  }
}

.dash-flow {
  stroke-dasharray: 5 9;
  animation: dashMove 2.6s linear infinite;
}

@keyframes dashMove {
  to {
    stroke-dashoffset: -56;
  }
}

/* ---------- 区块标题 ---------- */
.section-head {
  max-width: 700px;
  margin-bottom: 56px;
}

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

.section-head__tag {
  display: inline-block;
  font-size: 12px;
  font-family: var(--mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 16px;
}

.section-head__title {
  font-size: clamp(26px, 2.9vw, 36px);
  line-height: 1.35;
  font-weight: 650;
  color: var(--text);
  letter-spacing: -0.01em;
}

.section-head__desc {
  margin-top: 16px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-2);
}

/* ---------- 卡片网格 ---------- */
.grid {
  display: grid;
  gap: 20px;
}

.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: 30px 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: border-color 0.32s var(--ease), background 0.32s var(--ease),
    transform 0.32s var(--ease), box-shadow 0.32s var(--ease);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46, 123, 255, 0.55), transparent);
  opacity: 0;
  transition: opacity 0.32s var(--ease);
}

.card:hover {
  background: var(--card-hover);
  border-color: rgba(46, 123, 255, 0.32);
  transform: translateY(-3px);
  box-shadow: 0 20px 44px -22px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(46, 123, 255, 0.06);
}

.card:hover::before {
  opacity: 1;
}

.card__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  background: linear-gradient(140deg, rgba(46, 123, 255, 0.18), rgba(46, 123, 255, 0.04));
  border: 1px solid rgba(46, 123, 255, 0.2);
  margin-bottom: 20px;
}

.card__icon svg {
  width: 21px;
  height: 21px;
  stroke: var(--brand-light);
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card__title {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: 0.01em;
}

.card__desc {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-2);
}

.card__num {
  position: absolute;
  top: 24px;
  right: 26px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.08em;
  opacity: 0.6;
}

.card__list {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

.card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.8;
}

/* ---------- 服务卡片（带序号/更大） ---------- */
.svc {
  display: flex;
  flex-direction: column;
  padding: 34px 30px;
}

.svc__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.svc__idx {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--brand);
  letter-spacing: 0.06em;
  flex-shrink: 0;
  padding-top: 2px;
}

.svc__title {
  font-size: 17.5px;
  font-weight: 600;
  color: var(--text);
}

.svc__desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-2);
}

.svc__foot {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-size: 12px;
  color: var(--text-3);
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--line);
  line-height: 1.5;
}

/* ---------- 流程 ---------- */
.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
  margin-top: 8px;
}

.flow::before {
  content: "";
  position: absolute;
  top: 26px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46, 123, 255, 0.45), rgba(0, 229, 192, 0.35), transparent);
}

.flow__item {
  position: relative;
  padding: 0 14px;
  text-align: center;
}

.flow__dot {
  width: 52px;
  height: 52px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-2);
  position: relative;
  z-index: 1;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.flow__item:hover .flow__dot {
  border-color: rgba(46, 123, 255, 0.55);
  color: var(--brand-light);
  box-shadow: 0 0 0 5px rgba(46, 123, 255, 0.08);
}

.flow__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 7px;
}

.flow__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-3);
}

/* ---------- 关于我们 ---------- */
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.about__text p {
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--text-2);
  margin-bottom: 18px;
}

.about__text p:last-child {
  margin-bottom: 0;
}

.about__facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.fact {
  padding: 24px 22px;
  background: var(--card);
  transition: background 0.3s var(--ease);
}

.fact:hover {
  background: var(--card-hover);
}

.fact__key {
  display: block;
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.06em;
  margin-bottom: 7px;
}

.fact__val {
  display: block;
  font-size: 14.5px;
  color: var(--text);
  line-height: 1.6;
  word-break: break-word;
}

/* 理念条目 */
.values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.value {
  padding: 22px 0 0;
  border-top: 1px solid var(--line-strong);
}

.value__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.value__title::before {
  content: "";
  width: 3px;
  height: 13px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--brand), var(--accent));
}

.value__desc {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-3);
}

/* ---------- CTA 横幅 ---------- */
.cta-band {
  position: relative;
  padding: 62px 56px;
  border-radius: 24px;
  background: linear-gradient(120deg, #0D1728 0%, #101B30 55%, #0B1424 100%);
  border: 1px solid rgba(46, 123, 255, 0.2);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}

.cta-band::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -80px;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(46, 123, 255, 0.24), transparent 62%);
  pointer-events: none;
}

.cta-band::after {
  content: "";
  position: absolute;
  bottom: -180px;
  left: 12%;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(0, 229, 192, 0.12), transparent 65%);
  pointer-events: none;
}

.cta-band__text {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.cta-band__title {
  font-size: clamp(23px, 2.4vw, 30px);
  font-weight: 650;
  color: var(--text);
  line-height: 1.42;
  margin-bottom: 12px;
}

.cta-band__desc {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.8;
}

.cta-band__actions {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 13px;
  flex-wrap: wrap;
}

/* ---------- 页头（内页） ---------- */
.page-head {
  position: relative;
  padding: calc(var(--nav-h) + 84px) 0 68px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-head::after {
  content: "";
  position: absolute;
  top: -240px;
  left: 50%;
  transform: translateX(-50%);
  width: 980px;
  height: 520px;
  background: radial-gradient(circle at 50% 50%, rgba(46, 123, 255, 0.14), transparent 64%);
  pointer-events: none;
}

.page-head__title {
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  letter-spacing: -0.015em;
}

.page-head__desc {
  margin-top: 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-2);
  max-width: 640px;
}

/* 面包屑 */
.crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 22px;
}

.crumbs a:hover {
  color: var(--brand-light);
}

.crumbs span {
  opacity: 0.5;
}

/* ---------- 服务详情长条 ---------- */
.svc-detail {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 56px;
  padding: 52px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.svc-detail:last-child {
  border-bottom: 0;
}

.svc-detail__left {
  position: sticky;
  top: calc(var(--nav-h) + 32px);
}

.svc-detail__idx {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--brand);
  margin-bottom: 14px;
}

.svc-detail__title {
  font-size: 22px;
  font-weight: 650;
  color: var(--text);
  line-height: 1.45;
  margin-bottom: 14px;
}

.svc-detail__brief {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-3);
}

.svc-detail__body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.block-title {
  font-size: 13px;
  font-family: var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.check-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.check-list li {
  position: relative;
  padding-left: 26px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text-2);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: rgba(46, 123, 255, 0.14);
  border: 1px solid rgba(46, 123, 255, 0.34);
}

.check-list li::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 11px;
  width: 5px;
  height: 3px;
  border-left: 1.4px solid var(--brand-light);
  border-bottom: 1.4px solid var(--brand-light);
  transform: rotate(-45deg);
}

/* ---------- 行业场景 ---------- */
.scene {
  padding: 30px 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.028), transparent 60%);
  border: 1px solid var(--line);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.scene:hover {
  border-color: rgba(46, 123, 255, 0.26);
  background: linear-gradient(160deg, rgba(46, 123, 255, 0.07), transparent 65%);
}

.scene__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.scene__title svg {
  width: 18px;
  height: 18px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.6;
  flex-shrink: 0;
}

.scene__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scene__list li {
  font-size: 13.8px;
  line-height: 1.7;
  color: var(--text-2);
  padding-left: 14px;
  position: relative;
}

.scene__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.26);
}

/* ---------- 联系我们 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 48px;
  align-items: start;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.info-item {
  display: flex;
  gap: 18px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.info-item__icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(46, 123, 255, 0.09);
  border: 1px solid rgba(46, 123, 255, 0.18);
}

.info-item__icon svg {
  width: 18px;
  height: 18px;
  stroke: var(--brand-light);
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.info-item__key {
  font-size: 12.5px;
  color: var(--text-3);
  letter-spacing: 0.05em;
  margin-bottom: 5px;
}

.info-item__val {
  font-size: 15px;
  color: var(--text);
  line-height: 1.72;
  word-break: break-word;
}

.info-item__val small {
  display: block;
  font-size: 13px;
  color: var(--text-3);
  margin-top: 4px;
}

.info-item__val a {
  transition: color 0.22s var(--ease);
}

.info-item__val a:hover {
  color: var(--brand-light);
}

/* 表单 */
.form-card {
  padding: 36px 34px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.form-card__title {
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.form-card__desc {
  font-size: 13.5px;
  color: var(--text-3);
  margin-bottom: 28px;
  line-height: 1.7;
}

.field {
  margin-bottom: 18px;
}

.field__label {
  display: block;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 8px;
}

.field__label i {
  color: #FF6B6B;
  font-style: normal;
  margin-left: 3px;
}

.field__input,
.field__textarea {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  color: var(--text);
  font-family: inherit;
  font-size: 14.5px;
  line-height: 1.6;
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease),
    box-shadow 0.24s var(--ease);
  outline: none;
}

.field__input::placeholder,
.field__textarea::placeholder {
  color: #4C5A72;
}

.field__input:focus,
.field__textarea:focus {
  border-color: rgba(46, 123, 255, 0.6);
  background: rgba(46, 123, 255, 0.05);
  box-shadow: 0 0 0 3px rgba(46, 123, 255, 0.1);
}

.field__textarea {
  resize: vertical;
  min-height: 112px;
}

/* 下拉选择 */
select.field__input {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding-right: 40px;
  cursor: pointer;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5 6 6.5l5-5' stroke='%236A778E' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-color: rgba(255, 255, 255, 0.03);
}

select.field__input:focus {
  background-color: rgba(46, 123, 255, 0.05);
}

select.field__input option {
  background: #0E1524;
  color: #E8EEF9;
}

.field__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field__error {
  display: none;
  font-size: 12.5px;
  color: #FF8080;
  margin-top: 6px;
}

.field.has-error .field__input,
.field.has-error .field__textarea {
  border-color: rgba(255, 107, 107, 0.6);
}

.field.has-error .field__error {
  display: block;
}

.form-note {
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.7;
  margin-top: 16px;
}

.form-alert {
  display: none;
  padding: 13px 16px;
  border-radius: 9px;
  font-size: 13.5px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.form-alert.is-ok {
  display: block;
  background: rgba(0, 229, 192, 0.09);
  border: 1px solid rgba(0, 229, 192, 0.28);
  color: #7CF0DC;
}

/* ---------- FAQ ---------- */
.faq {
  border-top: 1px solid var(--line);
}

.faq__item {
  border-bottom: 1px solid var(--line);
}

.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.6;
  transition: color 0.24s var(--ease);
}

.faq__q:hover {
  color: var(--brand-light);
}

.faq__sign {
  position: relative;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.faq__sign::before,
.faq__sign::after {
  content: "";
  position: absolute;
  background: var(--text-3);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.faq__sign::before {
  top: 7.5px;
  left: 0;
  width: 16px;
  height: 1.5px;
}

.faq__sign::after {
  left: 7.5px;
  top: 0;
  width: 1.5px;
  height: 16px;
}

.faq__item.is-open .faq__sign::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq__item.is-open .faq__sign::before {
  background: var(--brand-light);
}

.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.42s var(--ease);
}

.faq__a-inner {
  padding: 0 0 24px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-2);
  max-width: 840px;
}

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
  padding: 62px 0 30px;
  position: relative;
  z-index: 1;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}

.footer__brand-desc {
  font-size: 13.8px;
  line-height: 1.85;
  color: var(--text-3);
  margin-top: 20px;
  max-width: 380px;
}

.footer__col-title {
  font-size: 13px;
  color: var(--text);
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer__links a,
.footer__links span {
  font-size: 13.8px;
  color: var(--text-3);
  transition: color 0.22s var(--ease);
  line-height: 1.6;
}

.footer__links a:hover {
  color: var(--brand-light);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding-top: 26px;
  font-size: 12.8px;
  color: var(--text-3);
  line-height: 1.7;
  text-align: center;
}

.footer__bottom a:hover {
  color: var(--brand-light);
}

/* ---------- 滚动渐显 ---------- */
/* 仅在 JS 可用时才隐藏，保证无脚本环境内容完整可见 */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

.reveal-d1 {
  transition-delay: 0.07s;
}
.reveal-d2 {
  transition-delay: 0.14s;
}
.reveal-d3 {
  transition-delay: 0.21s;
}
.reveal-d4 {
  transition-delay: 0.28s;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  .js .reveal {
    opacity: 1;
    transform: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ---------- 分隔装饰 ---------- */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
  margin: 0;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
  .section {
    padding: 84px 0;
  }
  .hero {
    padding: calc(var(--nav-h) + 72px) 0 80px;
  }
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 56px;
  }
  .hero__visual {
    order: -1;
    max-width: 420px;
    margin: 0 auto;
  }
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .flow {
    grid-template-columns: repeat(3, 1fr);
    row-gap: 36px;
  }
  .flow::before {
    display: none;
  }
  .about {
    grid-template-columns: 1fr;
    gap: 44px;
  }
  .svc-detail {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 44px 0;
  }
  .svc-detail__left {
    position: static;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
  .footer__top > :first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  :root {
    --nav-h: 62px;
  }
  .nav__menu {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 18px 22px;
    background: rgba(8, 12, 22, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.32s var(--ease), opacity 0.32s var(--ease), visibility 0.32s;
  }
  .nav.is-open .nav__menu {
    transform: none;
    opacity: 1;
    visibility: visible;
  }
  .nav__link {
    padding: 13px 14px;
    font-size: 15px;
  }
  .nav__link.is-active::after {
    display: none;
  }
  .nav__cta {
    margin: 10px 0 0;
  }
  .nav__cta .btn {
    width: 100%;
  }
  .nav__toggle {
    display: flex;
  }
  .section {
    padding: 68px 0;
  }
  .section--tight {
    padding: 56px 0;
  }
  .section-head {
    margin-bottom: 40px;
  }
  .hero__title {
    font-size: 31px;
  }
  .hero__desc {
    font-size: 15px;
    margin-top: 20px;
  }
  .hero__actions {
    margin-top: 30px;
  }
  .hero__actions .btn {
    flex: 1;
    min-width: 140px;
  }
  .hero__meta {
    margin-top: 38px;
    padding-top: 22px;
    gap: 22px 0;
  }
  /* 移动端首屏：文字优先，装饰图缩小下移 */
  .hero__visual {
    order: 0;
    max-width: 240px;
    margin: 4px auto 0;
  }
  .hero__meta-item {
    padding-right: 22px;
    margin-right: 22px;
  }
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
  .values {
    grid-template-columns: 1fr;
    gap: 22px;
  }
  .flow {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 30px;
  }
  .cta-band {
    padding: 38px 26px;
    gap: 30px;
  }
  .cta-band__actions {
    width: 100%;
  }
  .cta-band__actions .btn {
    flex: 1;
  }
  .svc-detail__body {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .form-card {
    padding: 28px 22px;
  }
  .field__row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .about__facts {
    grid-template-columns: 1fr;
  }
  .footer {
    padding: 46px 0 26px;
  }
  .footer__top {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 34px;
  }
  .page-head {
    padding: calc(var(--nav-h) + 62px) 0 48px;
  }
  .card {
    padding: 26px 22px;
  }
  .svc {
    padding: 28px 24px;
  }
}

@media (max-width: 400px) {
  .container,
  .nav__inner {
    padding: 0 18px;
  }
  .hero__title {
    font-size: 27px;
  }
  .flow {
    grid-template-columns: 1fr;
  }
}