/* ==========================================================================
   重庆疾速博援体育文化推广有限公司 — 官网样式
   纯手写 CSS，无任何外部框架 / CDN 依赖
   结构：变量 → 基础重置 → 通用布局 → 页头 → 首屏 → 各内容区块 → 页脚 → 动效 → 响应式
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计变量
   -------------------------------------------------------------------------- */
:root {
  /* 深色（首屏 / 页脚） */
  --night: #050f0c;
  --night-2: #0a1a16;
  --night-3: #10241e;
  --night-line: rgba(255, 255, 255, 0.1);

  /* 浅色（内容区） */
  --bg: #ffffff;
  --bg-alt: #f3f6f5;
  --line: #e2e8e6;
  --ink: #0c1512;
  --ink-2: #26332e;
  --muted: #5d6d67;

  /* 点缀色 */
  --lime: #b8ff3c;
  --lime-deep: #7cc400;
  --orange: #ff6a2b;

  /* 排版 */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;

  /* 布局 */
  --wrap: 1180px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 18px 40px -22px rgba(12, 21, 18, 0.35);
  --header-h: 68px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-2);
  background: var(--bg);
  overflow-x: clip;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
}

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

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

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: 0;
  background: none;
}

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

/* 跳转到主内容（无障碍） */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 10px 16px;
  background: var(--lime);
  color: var(--night);
  font-weight: 700;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
}

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

.section {
  padding: 88px 0;
  position: relative;
}

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

.section-head {
  max-width: 720px;
  margin-bottom: 44px;
}

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime-deep);
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: currentColor;
}

.section-head--center .eyebrow::before {
  display: none;
}

.section h2 {
  font-size: clamp(24px, 3.4vw, 36px);
}

.lead {
  margin-top: 16px;
  font-size: 16px;
  color: var(--muted);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: transform 0.18s ease, background-color 0.18s ease,
    border-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--lime);
  color: #08170a;
  box-shadow: 0 12px 28px -14px rgba(184, 255, 60, 0.9);
}

.btn--primary:hover {
  background: #c8ff63;
}

.btn--ghost {
  border: 1px solid rgba(255, 255, 255, 0.32);
  color: #ffffff;
}

.btn--ghost:hover {
  border-color: var(--lime);
  color: var(--lime);
}

.btn--outline {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
}

.btn--outline:hover {
  border-color: var(--lime-deep);
  color: var(--lime-deep);
}

.btn--dark {
  background: var(--night);
  color: #ffffff;
}

.btn--dark:hover {
  background: var(--night-2);
}

.btn__icon {
  width: 18px;
  height: 18px;
  flex: none;
}

/* 图标底色方块 */
.icon-box {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(184, 255, 60, 0.18);
  color: var(--lime-deep);
}

.icon-box svg {
  width: 24px;
  height: 24px;
}

/* --------------------------------------------------------------------------
   4. 页头与导航
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 15, 12, 0.92);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--night-line);
  background: rgba(5, 15, 12, 0.98);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: #ffffff;
  flex: none;
}

.brand__mark {
  width: 38px;
  height: 38px;
  flex: none;
}

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

.brand__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand__sub {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
}

.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__link {
  display: block;
  padding: 9px 13px;
  border-radius: 8px;
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.78);
  transition: color 0.16s ease, background-color 0.16s ease;
}

.site-nav__link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.07);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--lime);
  color: #08170a;
  font-size: 14px;
  font-weight: 700;
  transition: background-color 0.18s ease;
}

.header-phone:hover {
  background: #c8ff63;
}

.header-phone svg {
  width: 16px;
  height: 16px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--night-line);
  color: #ffffff;
  place-items: center;
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.nav-toggle__close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__open {
  display: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__close {
  display: block;
}

/* --------------------------------------------------------------------------
   5. 首屏
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  background-color: var(--night);
  color: #ffffff;
  padding: 108px 0 0;
  isolation: isolate;
}

/* 首屏氛围底图（叠加在渐变之下） */
.hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 62% 50%;
  opacity: 0.7;
}

/* 深色渐变遮罩，保证文字对比度 */
.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(120% 90% at 78% 18%, rgba(255, 106, 43, 0.24), transparent 58%),
    radial-gradient(90% 80% at 8% 88%, rgba(184, 255, 60, 0.18), transparent 60%),
    linear-gradient(160deg, rgba(5, 15, 12, 0.92) 0%, rgba(5, 15, 12, 0.72) 45%, rgba(5, 15, 12, 0.96) 100%);
}

/* 速度感斜纹 */
.hero__streaks {
  position: absolute;
  inset: -20% -10%;
  z-index: -1;
  background-image: repeating-linear-gradient(
    112deg,
    rgba(184, 255, 60, 0.09) 0 2px,
    rgba(184, 255, 60, 0) 2px 30px
  );
  opacity: 0.75;
  animation: streak-move 14s linear infinite;
  pointer-events: none;
}

@keyframes streak-move {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(-90px, 0, 0);
  }
}

.hero__inner {
  position: relative;
  max-width: 820px;
  padding-bottom: 96px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px 7px 11px;
  border-radius: 999px;
  border: 1px solid rgba(184, 255, 60, 0.4);
  background: rgba(184, 255, 60, 0.1);
  color: var(--lime);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero__badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(184, 255, 60, 0.18);
}

.hero h1 {
  color: #ffffff;
  font-size: clamp(32px, 6vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.hero h1 .accent {
  color: var(--lime);
  position: relative;
  white-space: nowrap;
}

.hero__sub {
  margin-top: 22px;
  max-width: 620px;
  font-size: clamp(15px, 1.7vw, 18px);
  color: rgba(255, 255, 255, 0.78);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

/* 数据条 */
.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--night-line);
  border-top: 1px solid var(--night-line);
}

.hero__stat {
  background: rgba(5, 15, 12, 0.72);
  padding: 22px 24px;
}

.hero__stat dt {
  font-size: 12.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}

.hero__stat dd {
  margin: 6px 0 0;
  font-size: clamp(16px, 2.2vw, 21px);
  font-weight: 700;
  color: #ffffff;
}

.hero__stat dd .unit {
  font-size: 0.72em;
  color: rgba(255, 255, 255, 0.62);
  margin-left: 4px;
}

/* --------------------------------------------------------------------------
   6. 关于我们
   -------------------------------------------------------------------------- */
.about__grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: start;
}

.about__body p + p {
  margin-top: 16px;
}

.about__body {
  color: var(--muted);
}

.facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.fact {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #ffffff;
}

.fact dt {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.fact dd {
  margin: 6px 0 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}

.fact dd small {
  display: block;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--muted);
  margin-top: 4px;
  line-height: 1.6;
}

/* 业务范围 */
.scope {
  margin-top: 56px;
  padding: 30px 32px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  border-left: 4px solid var(--lime);
  background: var(--bg-alt);
}

.scope h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.scope p {
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   7. 核心优势
   -------------------------------------------------------------------------- */
.cards-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 196, 0, 0.5);
  box-shadow: var(--shadow);
}

.card__index {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--lime-deep);
}

.card h3 {
  font-size: 19px;
}

.card p {
  color: var(--muted);
  font-size: 15px;
}

.card p + p {
  margin-top: 10px;
}

/* --------------------------------------------------------------------------
   8. 核心业务
   -------------------------------------------------------------------------- */
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.service {
  position: relative;
  padding: 30px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #ffffff;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.service:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 196, 0, 0.5);
  box-shadow: var(--shadow);
}

.service__head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.service h3 {
  font-size: 18px;
}

.service p {
  color: var(--muted);
  font-size: 15px;
}

.service p + p {
  margin-top: 10px;
}

/* --------------------------------------------------------------------------
   9. 服务流程
   -------------------------------------------------------------------------- */
.process {
  position: relative;
}

.process__list {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
}

.process__list::before {
  content: "";
  position: absolute;
  left: 4%;
  right: 4%;
  top: 23px;
  height: 2px;
  background: linear-gradient(
    90deg,
    rgba(184, 255, 60, 0.15),
    rgba(124, 196, 0, 0.65),
    rgba(255, 106, 43, 0.5)
  );
}

.step {
  position: relative;
  padding-top: 0;
}

.step__num {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--night);
  color: var(--lime);
  font-size: 15px;
  font-weight: 800;
  border: 2px solid rgba(184, 255, 60, 0.35);
}

.step h3 {
  margin-top: 18px;
  font-size: 16.5px;
  line-height: 1.45;
}

.step p {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--muted);
}

/* 布点示意图 */
.schematic {
  margin: 46px 0 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--night-line);
  background: var(--night);
}

.schematic img {
  width: 100%;
  height: auto;
}

.schematic figcaption {
  padding: 14px 20px 16px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.6);
  border-top: 1px solid var(--night-line);
}

/* --------------------------------------------------------------------------
   10. 项目案例
   -------------------------------------------------------------------------- */
.case {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #ffffff;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.case:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 196, 0, 0.5);
  box-shadow: var(--shadow);
}

.case__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 26px;
  background: var(--night);
}

.case__top svg {
  width: 28px;
  height: 28px;
  color: var(--lime);
}

.case__tag {
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(184, 255, 60, 0.16);
  border: 1px solid rgba(184, 255, 60, 0.4);
  color: var(--lime);
  font-size: 12.5px;
  font-weight: 700;
  white-space: nowrap;
}

.case__body {
  padding: 24px 26px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
}

.case h3 {
  font-size: 18px;
  line-height: 1.5;
}

.case dl {
  margin: 0;
  display: grid;
  gap: 8px;
}

.case dl > div {
  display: flex;
  gap: 10px;
  font-size: 14.5px;
}

.case dt {
  flex: none;
  width: 62px;
  color: var(--muted);
}

.case dd {
  margin: 0;
  color: var(--ink-2);
}

.case__note {
  font-size: 13.5px;
  color: var(--muted);
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  margin-top: auto;
}

.cases-source {
  margin-top: 22px;
  font-size: 14px;
  color: var(--muted);
  text-align: center;
}

/* --------------------------------------------------------------------------
   11. 联系我们
   -------------------------------------------------------------------------- */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: start;
}

.contact-list {
  display: grid;
  gap: 14px;
}

.contact-item {
  display: flex;
  gap: 16px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #ffffff;
}

.contact-item .icon-box {
  flex: none;
  background: rgba(184, 255, 60, 0.2);
}

.contact-item dt {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.contact-item dd {
  margin: 5px 0 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.6;
  word-break: break-word;
}

.contact-item dd a:hover {
  color: var(--lime-deep);
}

.contact-item dd small {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  margin-top: 4px;
}

.map-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--lime-deep);
  border-bottom: 1px solid rgba(124, 196, 0, 0.35);
}

.map-link svg {
  width: 15px;
  height: 15px;
}

.contact-actions {
  padding: 30px 30px 34px;
  border-radius: var(--radius);
  background: var(--night);
  color: #ffffff;
}

.contact-actions h3 {
  color: #ffffff;
  font-size: 20px;
}

.contact-actions > p {
  margin-top: 10px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.7);
}

.contact-actions__list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.contact-actions__list .btn {
  width: 100%;
}

.copy-hint {
  margin-top: 14px;
  min-height: 20px;
  font-size: 13.5px;
  color: var(--lime);
}

/* --------------------------------------------------------------------------
   12. 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--night);
  color: rgba(255, 255, 255, 0.62);
  padding: 52px 0 34px;
  font-size: 14px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
}

.footer__brand {
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.footer__title {
  color: #ffffff;
  font-weight: 700;
  font-size: 14.5px;
  margin-bottom: 12px;
}

.footer__list {
  display: grid;
  gap: 8px;
}

.footer__list a:hover {
  color: var(--lime);
}

.footer__bottom {
  margin-top: 38px;
  padding-top: 20px;
  border-top: 1px solid var(--night-line);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  justify-content: space-between;
  font-size: 13px;
}

/* 备案信息（工信部 ICP + 公安联网备案）：与页脚同色系，链接可点 */
.footer__legal {
  margin: 10px 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

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

.footer__legal a:hover,
.footer__legal a:focus-visible {
  color: var(--lime);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   13. 滚动入场动效
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 无 JS 时也要能正常阅读：JS 会在初始化时加上 js-ready */
.no-js .reveal,
html:not(.js-ready) .reveal {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   14. 响应式
   -------------------------------------------------------------------------- */

/* 平板 */
@media (max-width: 1024px) {
  .section {
    padding: 72px 0;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .cards-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cards-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 24px;
  }

  .process__list::before {
    display: none;
  }

  .contact__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  /* 导航折叠 */
  .nav-toggle {
    display: grid;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    background: rgba(5, 15, 12, 0.99);
    border-bottom: 1px solid var(--night-line);
    padding: 10px 24px 22px;
    display: none;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    padding: 14px 6px;
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 0;
  }

  .header-phone span {
    display: none;
  }

  .header-phone {
    padding: 10px 12px;
  }

  /* 折叠态：品牌居左，操作区靠右 */
  .header-actions {
    margin-left: auto;
  }
}

/* 手机 */
@media (max-width: 640px) {
  .wrap {
    padding: 0 18px;
  }

  .section {
    padding: 58px 0;
  }

  .section-head {
    margin-bottom: 32px;
  }

  .hero {
    padding-top: 76px;
  }

  .hero__inner {
    padding-bottom: 68px;
  }

  .hero__stats {
    grid-template-columns: 1fr;
  }

  .hero__stat {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 18px;
  }

  .hero__stat dd {
    margin: 0;
    text-align: right;
  }

  .hero__cta .btn {
    flex: 1 1 100%;
  }

  .cards-4,
  .cards-3,
  .facts,
  .process__list,
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .card,
  .service {
    padding: 24px 20px;
  }

  .scope {
    padding: 24px 20px;
  }

  /* 流程改为纵向时间轴 */
  .process__list {
    gap: 26px;
  }

  .step {
    padding-left: 62px;
    min-height: 46px;
  }

  .step__num {
    position: absolute;
    left: 0;
    top: 0;
  }

  .step h3 {
    margin-top: 0;
  }

  .step + .step::before {
    content: "";
    position: absolute;
    left: 22px;
    top: -26px;
    height: 26px;
    width: 2px;
    background: rgba(124, 196, 0, 0.35);
  }

  .contact-actions {
    padding: 26px 20px 28px;
  }

  .case__top,
  .case__body {
    padding-left: 20px;
    padding-right: 20px;
  }

  .brand__sub {
    display: none;
  }
}

/* 极窄屏（375px 及以下）微调，确保无横向滚动 */
@media (max-width: 400px) {
  .wrap {
    padding: 0 15px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .case dl > div {
    flex-direction: column;
    gap: 2px;
  }

  .case dt {
    width: auto;
  }

  .footer__bottom {
    flex-direction: column;
  }
}

/* --------------------------------------------------------------------------
   15. 降低动效偏好
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .hero__streaks {
    animation: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .btn:hover,
  .card:hover,
  .service:hover,
  .case:hover {
    transform: none;
  }
}

/* --------------------------------------------------------------------------
   16. 打印
   -------------------------------------------------------------------------- */
@media print {
  .site-header,
  .hero__streaks,
  .contact-actions,
  .nav-toggle {
    display: none;
  }

  body {
    color: #000;
  }
}