/* ==========================================================================
   灵枢 LSHU 公司主站全站样式
   设计语言：深藏青 #0a2a66 → 电路青 #2ec4ff 渐变，电路板走线点缀
   响应式断点：1200px / 768px / 480px
   ========================================================================== */

/* ---------- CSS 变量（主题） ---------- */
:root {
  --navy: #0a2a66;
  --navy-deep: #071b45;
  --blue: #1478d2;
  --cyan: #2ec4ff;
  --cyan-light: #7fdcff;
  --grad-brand: linear-gradient(135deg, #0a2a66 0%, #1478d2 55%, #2ec4ff 100%);
  --grad-text: linear-gradient(90deg, #0a2a66, #1478d2, #2ec4ff);

  --bg: #ffffff;
  --bg-soft: #f4f8fd;
  --bg-card: #ffffff;
  --text: #1c2b45;
  --text-muted: #5a6b85;
  --border: #e2eaf5;

  --radius: 14px;
  --shadow-sm: 0 2px 10px rgba(10, 42, 102, 0.06);
  --shadow-md: 0 10px 30px rgba(10, 42, 102, 0.10);
  --shadow-glow: 0 0 24px rgba(46, 196, 255, 0.35);

  --maxw: 1200px;
  --header-h: 68px;

  --font: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

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

/* 锚点跳转时预留粘性头部高度，避免目标被遮挡 */
[id] {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

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

a {
  color: var(--blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

h1, h2, h3, h4 {
  margin: 0 0 0.5em;
  line-height: 1.3;
  font-weight: 800;
  color: var(--navy);
}

p {
  margin: 0 0 1em;
}

ul {
  margin: 0;
  padding: 0;
}

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

.section {
  padding: 84px 0;
}

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

.section__head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section__eyebrow {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 10px;
}

.section__title {
  font-size: 34px;
}

.section__title::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin: 16px auto 0;
  border-radius: 4px;
  background: var(--grad-brand);
}

.section__desc {
  color: var(--text-muted);
  margin-top: 18px;
  font-size: 17px;
}

/* ==========================================================================
   头部导航
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.25s ease;
}

.header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand__logo {
  height: 38px;
  width: auto;
}

.brand__name {
  font-size: 18px;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: 1px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  border-radius: 8px;
}

.nav__link:hover {
  color: var(--blue);
  background: var(--bg-soft);
}

.nav__link.is-active {
  color: var(--navy);
}

.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 3px;
  border-radius: 3px;
  background: var(--grad-brand);
}

.nav__cta {
  margin-left: 10px;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

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

/* ==========================================================================
   按钮
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.btn--primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn--ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}

.btn--ghost:hover {
  color: #fff;
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.btn--outline {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy);
}

.btn--outline:hover {
  background: var(--navy);
  color: #fff;
}

.btn--sm {
  padding: 9px 20px;
  font-size: 14px;
}

/* ==========================================================================
   Hero（首页深色区 + 电路背景）
   ========================================================================== */
.hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(1200px 600px at 70% -10%, #1478d2 0%, var(--navy) 45%, var(--navy-deep) 100%);
  color: #fff;
  padding: 96px 0 108px;
}

.hero__circuit {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.5;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--cyan-light);
  background: rgba(46, 196, 255, 0.12);
  border: 1px solid rgba(46, 196, 255, 0.35);
  border-radius: 999px;
  margin-bottom: 22px;
}

.hero__badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

.hero__title {
  font-size: 46px;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero__title .grad {
  background: linear-gradient(90deg, #7fdcff, #2ec4ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__subtitle {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.82);
  max-width: 560px;
  margin-bottom: 32px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero__logo-card {
  justify-self: center;
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1 / 0.82;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(160deg, #ffffff 0%, #eaf4ff 100%);
  border: 1px solid rgba(127, 220, 255, 0.5);
  border-radius: 24px;
  box-shadow: var(--shadow-glow);
  animation: float 6s ease-in-out infinite;
}

.hero__logo-card img {
  width: 82%;
  border-radius: 12px;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* Hero 底部数据条 */
.hero__stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.stat {
  text-align: center;
}

.stat__num {
  font-size: 34px;
  font-weight: 800;
  background: linear-gradient(90deg, #7fdcff, #2ec4ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat__label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
}

/* ==========================================================================
   业务卡片
   ========================================================================== */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.card {
  position: relative;
  padding: 34px 26px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: var(--cyan-light);
}

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

.card__icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-brand);
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}

.card__icon svg {
  width: 30px;
  height: 30px;
  stroke: #fff;
  fill: none;
  stroke-width: 2;
}

.card__title {
  font-size: 20px;
  margin-bottom: 10px;
}

.card__text {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 16px;
}

.card__link {
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   图文两列 feature
   ========================================================================== */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.feature--reverse .feature__media {
  order: 2;
}

.feature__media {
  border-radius: var(--radius);
  background: var(--grad-brand);
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.feature__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(127, 220, 255, 0.4), transparent 55%);
}

.feature__media svg {
  position: relative;
  z-index: 1;
  width: 40%;
  stroke: #fff;
  fill: none;
  stroke-width: 1.5;
}

.feature__title {
  font-size: 28px;
}

.feature__list {
  list-style: none;
  margin: 20px 0 0;
}

.feature__list li {
  position: relative;
  padding: 8px 0 8px 32px;
  color: var(--text);
}

.feature__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--grad-brand);
}

.feature__list li::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 19px;
  width: 4px;
  height: 8px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* ==========================================================================
   经营范围
   ========================================================================== */
.scope {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 5px solid var(--cyan);
  border-radius: var(--radius);
  padding: 34px 36px;
  box-shadow: var(--shadow-sm);
}

.scope h3 {
  font-size: 20px;
}

.scope p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.9;
}

.scope__note {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  font-size: 13px;
  color: var(--text-muted);
}

/* ==========================================================================
   CTA 区块
   ========================================================================== */
.cta {
  position: relative;
  overflow: hidden;
  background: var(--grad-brand);
  border-radius: 24px;
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  box-shadow: var(--shadow-md);
}

.cta__circuit {
  position: absolute;
  inset: 0;
  opacity: 0.3;
  pointer-events: none;
}

.cta h2 {
  position: relative;
  color: #fff;
  font-size: 32px;
  margin-bottom: 14px;
}

.cta p {
  position: relative;
  color: rgba(255, 255, 255, 0.88);
  max-width: 560px;
  margin: 0 auto 30px;
}

.cta .btn--white {
  position: relative;
  background: #fff;
  color: var(--navy);
}

.cta .btn--white:hover {
  color: var(--blue);
  transform: translateY(-2px);
}

/* ==========================================================================
   内部页面 banner
   ========================================================================== */
.page-banner {
  position: relative;
  overflow: hidden;
  background: var(--grad-brand);
  color: #fff;
  padding: 72px 0;
  text-align: center;
}

.page-banner__circuit {
  position: absolute;
  inset: 0;
  opacity: 0.4;
  pointer-events: none;
}

.page-banner h1 {
  position: relative;
  color: #fff;
  font-size: 40px;
  margin-bottom: 10px;
}

.page-banner p {
  position: relative;
  color: rgba(255, 255, 255, 0.85);
  font-size: 17px;
  max-width: 640px;
  margin: 0 auto;
}

.breadcrumb {
  position: relative;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 14px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
}

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

/* ==========================================================================
   时间线（发展历程）
   ========================================================================== */
.timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding-left: 32px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--cyan), var(--navy));
}

.timeline__item {
  position: relative;
  padding: 0 0 34px 24px;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(46, 196, 255, 0.15);
}

.timeline__year {
  font-weight: 800;
  color: var(--blue);
  font-size: 18px;
}

.timeline__body {
  color: var(--text-muted);
}

/* ==========================================================================
   服务详情 block
   ========================================================================== */
.service-block {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
  padding: 44px 0;
  border-bottom: 1px solid var(--border);
}

.service-block:last-child {
  border-bottom: none;
}

/* 反向布局：内容在左、图标在右 */
.service-block--reverse {
  grid-template-columns: 1fr 220px;
}

.service-block--reverse .service-block__body {
  order: 1;
}

.service-block--reverse .service-block__icon {
  order: 2;
  justify-self: end;
}

.service-block__icon {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  background: var(--grad-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.service-block__icon svg {
  width: 56px;
  height: 56px;
  stroke: #fff;
  fill: none;
  stroke-width: 1.6;
}

.service-block__title {
  font-size: 26px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.service-block__no {
  font-size: 15px;
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: 1px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0;
}

.tag {
  padding: 5px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
  background: rgba(46, 196, 255, 0.1);
  border: 1px solid rgba(46, 196, 255, 0.3);
  border-radius: 999px;
}

/* ==========================================================================
   联系页
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: start;
}

.info-list {
  list-style: none;
}

.info-list li {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.info-list li:last-child {
  border-bottom: none;
}

.info-list__icon {
  flex: 0 0 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--grad-brand);
  display: flex;
  align-items: center;
  justify-content: center;
}

.info-list__icon svg {
  width: 22px;
  height: 22px;
  stroke: #fff;
  fill: none;
  stroke-width: 2;
}

.info-list__label {
  font-size: 13px;
  color: var(--text-muted);
}

.info-list__value {
  font-weight: 700;
  color: var(--navy);
  font-size: 17px;
}

/* 可点击拨打/发邮件的电话与邮箱链接 */
a.info-list__value {
  display: inline-block;
  -webkit-tap-highlight-color: transparent;
}

.footer__contact a {
  -webkit-tap-highlight-color: transparent;
}

/* 表单 */
.form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px;
  box-shadow: var(--shadow-sm);
}

.form__group {
  margin-bottom: 20px;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.form input,
.form textarea,
.form select {
  width: 100%;
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form input:focus,
.form textarea:focus,
.form select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(46, 196, 255, 0.18);
  background: #fff;
}

.form textarea {
  min-height: 130px;
  resize: vertical;
}

.form__notice {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 14px;
}

.form__msg {
  display: none;
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
}

.form__msg.is-show {
  display: block;
}

.form__msg--info {
  background: rgba(46, 196, 255, 0.1);
  border: 1px solid rgba(46, 196, 255, 0.35);
  color: var(--navy);
}

/* ==========================================================================
   隐私政策文本
   ========================================================================== */
.prose {
  max-width: 820px;
  margin: 0 auto;
}

.prose h2 {
  font-size: 24px;
  margin-top: 40px;
}

.prose h3 {
  font-size: 19px;
  margin-top: 28px;
}

.prose p,
.prose li {
  color: var(--text);
  line-height: 1.9;
}

.prose ul {
  padding-left: 22px;
  list-style: disc;
}

.prose .updated {
  color: var(--text-muted);
  font-size: 14px;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.78);
  padding: 64px 0 0;
  font-size: 14px;
}

.footer a {
  color: rgba(255, 255, 255, 0.78);
}

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

.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
}

.footer__logo {
  height: 34px;
  margin-bottom: 16px;
}

.footer__about {
  max-width: 320px;
  line-height: 1.8;
}

.footer__title {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer__links {
  list-style: none;
}

.footer__links li {
  margin-bottom: 12px;
}

.footer__contact li {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  line-height: 1.6;
}

.footer__contact svg {
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  stroke: var(--cyan);
  fill: none;
  stroke-width: 2;
  margin-top: 2px;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  line-height: 2;
}

.footer__record a {
  color: rgba(255, 255, 255, 0.6);
}

.footer__record a:hover {
  color: var(--cyan-light);
}

/* 占位符高亮（上线前替换提醒） */
.ph {
  color: var(--cyan-light);
  background: rgba(46, 196, 255, 0.12);
  border: 1px dashed rgba(46, 196, 255, 0.5);
  border-radius: 4px;
  padding: 0 6px;
  font-weight: 600;
}

/* ==========================================================================
   滚动淡入动画
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ==========================================================================
   响应式：1200px
   ========================================================================== */
@media (max-width: 1200px) {
  .hero__title { font-size: 40px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

/* ==========================================================================
   响应式：768px
   ========================================================================== */
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section__title { font-size: 27px; }

  /* 移动端导航 */
  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 24px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
  }
  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav__link { display: block; padding: 14px 8px; }
  .nav__link.is-active::after { display: none; }
  .nav__cta { margin: 12px 0 0; }

  .hero { padding: 64px 0 72px; }
  .hero__inner { grid-template-columns: 1fr; gap: 36px; }
  .hero__logo-card { order: -1; max-width: 300px; }
  .hero__title { font-size: 32px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); gap: 28px 12px; }

  .feature,
  .feature--reverse .feature__media { grid-template-columns: 1fr; }
  .feature { gap: 32px; }
  .feature--reverse .feature__media { order: 0; }

  .service-block { grid-template-columns: 1fr; gap: 24px; text-align: center; }
  .service-block__icon { margin: 0 auto; }
  .service-block__title { justify-content: center; }
  .tags { justify-content: center; }

  /* 移动端取消反向布局，恢复图标在上 */
  .service-block--reverse { grid-template-columns: 1fr; }
  .service-block--reverse .service-block__icon { order: 0; justify-self: center; }
  .service-block--reverse .service-block__body { order: 1; }

  .contact-grid { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .cta { padding: 48px 28px; }
  .cta h2 { font-size: 26px; }
  .page-banner h1 { font-size: 32px; }
}

/* ==========================================================================
   响应式：480px
   ========================================================================== */
@media (max-width: 480px) {
  .cards { grid-template-columns: 1fr; }
  .hero__title { font-size: 27px; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .footer__grid { grid-template-columns: 1fr; }
  .scope { padding: 24px 20px; }
  .form { padding: 24px 20px; }
}