/* =========================================================
   金广禾广告官网 v4.1
   设计语言：清爽白底 + 深色文字 + 蓝色点缀
   头部固定白底，保证可读性；首屏为左文右图
   ========================================================= */

:root {
  --bg: #FFFFFF;
  --bg-soft: #F6F7F8;
  --surface: #FFFFFF;
  --ink: #111114;
  --muted: #667085;
  --line: #E6E8EB;
  --accent: #2456FF;
  --accent-soft: rgba(36, 86, 255, 0.08);
  --dark: #0E0E12;

  --font-display: "Poppins", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Open Sans", sans-serif;

  --container: 1200px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-1: 0 1px 2px rgba(16, 16, 20, 0.04), 0 10px 28px rgba(16, 16, 20, 0.06);
  --shadow-2: 0 24px 56px rgba(16, 16, 20, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

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

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px var(--accent-soft);
}

::selection {
  background: rgba(36, 86, 255, 0.16);
  color: var(--ink);
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: #C9C9C4;
  border-radius: 8px;
  border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
  background: #A6A6A0;
}

.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 12px;
  z-index: 2000;
  background: var(--ink);
  color: #fff;
  padding: 12px 18px;
  border-radius: 8px;
}

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

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #6C8CFF);
  z-index: 3000;
  pointer-events: none;
  transition: width 0.08s linear;
}

/* ---------- 回到顶部 ---------- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 1500;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  font-size: 19px;
  box-shadow: var(--shadow-1);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), color 0.3s var(--ease);
}

.back-to-top.show {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.back-to-top:hover {
  color: var(--accent);
  transform: translateY(-3px);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 24px;
  border-radius: 11px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14.5px;
  line-height: 1;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background-color 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn::after {
  content: "→";
  display: inline-block;
  margin-left: 6px;
  transition: transform 0.25s var(--ease);
}

.btn:hover::after {
  transform: translateX(4px);
}

.btn-primary {
  background: var(--ink);
  color: #fff;
  box-shadow: 0 8px 20px rgba(17, 17, 20, 0.14);
}

.btn-primary:hover {
  background: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(36, 86, 255, 0.24);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost:hover {
  border-color: var(--ink);
  background: var(--ink);
  color: #fff;
  transform: translateY(-2px);
}

.btn-light {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 8px 24px rgba(14, 14, 18, 0.25);
}

.btn-light:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(36, 86, 255, 0.3);
}

.btn-ghost-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.38);
}

.btn-ghost-light:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* ---------- 页头（固定白底，保证可读性） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s var(--ease);
}

.site-header.scrolled {
  box-shadow: 0 8px 28px rgba(16, 16, 20, 0.06);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.brand img {
  border-radius: 9px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-list a {
  font-size: 14.5px;
  font-weight: 500;
  color: #4B5563;
  position: relative;
  padding: 6px 0;
  transition: color 0.2s var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}

.nav-list a:hover,
.nav-list a[aria-current="true"] {
  color: var(--ink);
}

.nav-list a:hover::after,
.nav-list a[aria-current="true"]::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}

/* ---------- 首屏（深色大片式 banner，导航在白色导航条上，不影响阅读） ---------- */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: max(640px, 92vh);
  background: var(--dark);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(14, 14, 18, 0.55) 0%, rgba(14, 14, 18, 0.42) 40%, rgba(14, 14, 18, 0.78) 100%),
    linear-gradient(100deg, rgba(14, 14, 18, 0.86) 0%, rgba(14, 14, 18, 0.5) 55%, rgba(14, 14, 18, 0.18) 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 0 40px;
}

.hero-content {
  max-width: 780px;
}

.hero-eyebrow {
  color: var(--accent-light, #6C8CFF);
  margin-bottom: 22px;
}

.hero h1 {
  color: #fff;
  font-size: clamp(42px, 6.8vw, 84px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  text-shadow: 0 4px 40px rgba(0, 0, 0, 0.3);
}

.hero h1 span {
  color: #6C8CFF;
}

.hero-sub {
  margin-top: 24px;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.78);
  max-width: 640px;
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 780px;
  margin-top: 64px;
  border-top: 0;
  padding-top: 0;
}

.hero-stats li {
  padding: 4px 22px 4px 0;
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.hero-stats li:not(:first-child) {
  padding-left: 22px;
  border-left: 0;
}

.hero-stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: #fff;
}

.hero-stats em {
  font-style: normal;
  font-size: 0.58em;
  font-weight: 600;
  color: #6C8CFF;
  margin-left: 2px;
}

.hero-stats span {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.55);
}

/* 首屏底部滚动字幕 */
.hero-ticker {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  border-bottom: 0;
  background: transparent;
  overflow: hidden;
}

.ticker-track {
  display: flex;
  align-items: center;
  width: max-content;
  animation: ticker 30s linear infinite;
}

.ticker-track span {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: rgba(255, 255, 255, 0.48);
  padding: 15px 0;
  white-space: nowrap;
}

.ticker-track i {
  font-style: normal;
  color: #6C8CFF;
  margin: 0 34px;
}

@keyframes ticker {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

/* ---------- 区块通用 ---------- */
.section {
  padding: 84px 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 42px;
}

.section-head h2 {
  font-size: clamp(27px, 3.4vw, 38px);
  font-weight: 800;
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.section-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  text-align: right;
}

/* ---------- 服务 ---------- */
.services-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.75fr);
  gap: 48px;
  align-items: start;
}

.service-list {
  border-top: 1px solid var(--line);
}

.service-row {
  display: grid;
  grid-template-columns: 76px 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 24px 8px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.service-row:hover {
  background: var(--bg-soft);
  padding-left: 18px;
}

.service-num {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: #B9B9B2;
  transition: color 0.25s var(--ease);
}

.service-row:hover .service-num {
  color: var(--accent);
}

.service-body h3 {
  font-size: 19px;
  font-weight: 700;
}

.service-body p {
  margin-top: 5px;
  font-size: 13.5px;
  color: var(--muted);
  max-width: 480px;
}

.service-arrow {
  font-size: 20px;
  color: #C9C9C4;
  transition: transform 0.25s var(--ease), color 0.25s var(--ease);
}

.service-row:hover .service-arrow {
  color: var(--accent);
  transform: translateX(6px);
}

/* 服务侧栏 */
.service-note {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  position: sticky;
  top: 92px;
}

.note-kicker {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 20px;
}

.service-note ul li {
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.service-note ul li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
  margin-bottom: 22px;
}

.service-note strong {
  display: block;
  font-size: 15.5px;
  color: var(--ink);
  margin-bottom: 6px;
}

.service-note span {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  transition: color 0.2s var(--ease);
}

.text-link:hover {
  color: var(--ink);
}

/* ---------- 案例 ---------- */
.works {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.work-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
  border-color: rgba(36, 86, 255, 0.35);
}

.work-link {
  display: block;
}

.work-cover {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #E8EAED;
}

.work-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.work-card:hover .work-cover img {
  transform: scale(1.05);
}

.work-cat {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1;
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(14, 14, 18, 0.58);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.work-info {
  padding: 17px 18px 19px;
}

.work-info h3 {
  font-size: 17px;
  font-weight: 700;
}

.work-info p {
  margin: 6px 0 12px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.work-tag {
  display: inline-block;
  padding: 4px 11px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 600;
}

/* ---------- 流程 ---------- */
.process-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.process-item {
  border-top: 2px solid var(--line);
  padding-top: 20px;
  transition: border-color 0.25s var(--ease);
}

.process-item:hover {
  border-color: var(--accent);
}

.step-num {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.process-item h3 {
  margin-top: 10px;
  font-size: 17px;
  font-weight: 700;
}

.process-item p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 联系 ---------- */
.contact {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 64px;
  align-items: start;
}

.contact-info h2 {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 800;
}

.contact-desc {
  margin-top: 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.contact-list {
  margin-top: 34px;
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.ci {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  flex: none;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
}

.contact-list strong {
  display: block;
  font-size: 15px;
}

.contact-list small {
  display: block;
  margin-top: 2px;
  font-size: 14px;
  color: var(--muted);
}

.contact-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  box-shadow: var(--shadow-1);
}

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

.form-field {
  margin-bottom: 18px;
}

.form-field label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 8px;
}

.required {
  color: #E11D48;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  min-height: 47px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--bg);
  color: var(--ink);
  font-size: 14.5px;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.form-field textarea {
  padding: 12px 14px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.form-status {
  margin-top: 14px;
  font-size: 14px;
  font-weight: 500;
}

.form-status.success {
  color: #059669;
}

.form-status.error {
  color: #E11D48;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.66);
  padding: 56px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr 1.3fr;
  gap: 44px;
  padding-bottom: 44px;
}

.footer-brand .brand {
  color: #fff;
}

.footer-brand p {
  max-width: 280px;
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
}

.footer-col h3 {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 13.5px;
}

.footer-col a {
  transition: color 0.2s var(--ease);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 18px 0 22px;
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.42);
}

.beian-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
}

.beian-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  opacity: 0.85;
  transition: opacity 0.2s var(--ease), color 0.2s var(--ease);
}

.beian-links a:hover {
  opacity: 1;
  color: #fff;
}

.beian-links img {
  width: 16px;
  height: 16px;
}


/* ---------- 进场动画（JS 启用时才隐藏，避免无 JS 时白屏） ---------- */
.reveal {
  opacity: 1;
}

html.js-anim .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

html.js-anim .reveal.visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .section {
    padding: 64px 0;
  }

  .hero {
    min-height: 620px;
  }

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

  .service-note {
    position: static;
  }

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

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

@media (max-width: 768px) {
  .container {
    width: min(100% - 32px, var(--container));
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 90;
    flex-direction: column;
    justify-content: center;
    gap: 40px;
    background: var(--bg);
    transform: translateX(100%);
    transition: transform 0.4s var(--ease);
  }

  .site-nav.open {
    transform: translateX(0);
  }

  .site-nav .btn {
    display: inline-flex;
  }

  .nav-list {
    flex-direction: column;
    gap: 26px;
    text-align: center;
  }

  .nav-list a {
    font-size: 21px;
  }

  .hero {
    min-height: max(560px, 92vh);
  }

  .hero-inner {
    padding: 100px 0 32px;
  }

  .hero h1 {
    font-size: clamp(34px, 9.5vw, 46px);
  }

  .hero-sub {
    font-size: 14.5px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 24px;
    margin-top: 44px;
  }

  .hero-stats li:nth-child(2) {
    border-right: 0;
  }

  .hero-stats li:nth-child(n+3) {
    padding-left: 0;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 32px;
  }

  .section-desc {
    text-align: left;
  }

  .service-row {
    grid-template-columns: 52px 1fr;
    gap: 14px;
    padding: 20px 2px;
  }

  .service-arrow {
    display: none;
  }

  .work-grid,
  .process-list,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 24px 20px;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
  }
}

/* ---------- 降低动画偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html.js-anim .reveal {
    opacity: 1;
    transform: none;
  }
}