/* ==========================================================================
   广州市良心科技有限公司 — Apple 风格设计系统
   设计原则：极简、留白、层级清晰、质感细腻（WCAG 2.2 AA）
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 品牌色（沿用原站主色 #5b94ab，莫兰迪蓝） */
  --brand: #5b94ab;
  --brand-deep: #3f6e83;
  --brand-soft: rgba(91, 148, 171, 0.12);
  --brand-ink: #2c4a57;

  /* 中性色 */
  --ink: #1d1d1f;
  --ink-2: #424245;
  --ink-3: #6e6e73;
  --ink-4: #86868b;
  --surface: #ffffff;
  --surface-2: #f5f5f7;
  --surface-3: #fbfbfd;
  --line: rgba(0, 0, 0, 0.08);
  --line-strong: rgba(0, 0, 0, 0.14);

  /* 状态色 */
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro SC",
    "PingFang SC", "Helvetica Neue", "Microsoft YaHei", "Segoe UI", sans-serif;

  /* 字号阶梯 */
  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-24: 1.5rem;
  --fs-30: 1.875rem;
  --fs-36: 2.25rem;
  --fs-display: clamp(2.5rem, 7vw, 5.5rem);
  --fs-h1: clamp(2rem, 4.5vw, 3.25rem);
  --fs-h2: clamp(1.625rem, 3.5vw, 2.5rem);
  --fs-h3: clamp(1.25rem, 2.2vw, 1.625rem);

  /* 间距阶梯 */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-8: 48px;
  --sp-10: 64px;
  --sp-12: 96px;
  --sp-16: 128px;

  /* 圆角与阴影 */
  --r-sm: 10px;
  --r-md: 18px;
  --r-lg: 28px;
  --r-pill: 980px;
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-2: 0 8px 32px rgba(0, 0, 0, 0.10), 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-3: 0 24px 64px rgba(0, 0, 0, 0.16);

  /* 动效 */
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --dur: 0.4s;

  /* 布局 */
  --container: 1120px;
  --header-h: 52px;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--ink);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1em; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.2; letter-spacing: -0.015em; }
button { font: inherit; }

::selection { background: var(--brand-soft); }

/* 键盘焦点可见性（AA） */
:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

/* 跳转链接 */
.skip-link {
  position: absolute;
  left: var(--sp-4);
  top: -48px;
  z-index: 999;
  background: var(--ink);
  color: #fff;
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--r-sm);
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: var(--sp-2); }

/* ---------- 3. 布局工具 ---------- */
.container {
  width: min(100% - 48px, var(--container));
  margin-inline: auto;
}

.section { padding-block: var(--sp-12); }
.section--alt { background: var(--surface-2); }
.section--tight { padding-block: var(--sp-10); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-14);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--brand);
  text-transform: uppercase;
  margin-bottom: var(--sp-3);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}

.section-head { max-width: 720px; margin-bottom: var(--sp-8); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head--center .eyebrow { justify-content: center; }

.section-title { font-size: var(--fs-h2); margin-bottom: var(--sp-3); }
.section-sub { font-size: var(--fs-18); color: var(--ink-3); margin: 0; }

/* ---------- 4. 导航（Apple 风格：左 Logo · 中菜单 · 右图标） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.nav {
  position: relative;
  height: var(--header-h);
  display: flex;
  align-items: center;
}

.nav__brand {
  flex: none;
  display: inline-flex;
  align-items: center;
  margin-right: var(--sp-5);
  border-radius: 8px;
  transition: opacity 0.2s var(--ease);
}
.nav__brand:hover { opacity: 0.7; }
.nav__logo {
  display: block;
  height: 30px;
  width: auto;
}
.footer-brand .nav__logo {
  height: 44px;
}

/* 中间菜单：绝对居中（桌面端） */
.nav__center {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.nav__link {
  position: relative;
  display: inline-block;
  padding: var(--sp-2) 2px;
  font-size: var(--fs-14);
  color: var(--ink-2);
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}
.nav__link:hover { color: var(--ink); }
.nav__link[aria-current="page"] { color: var(--ink); }
.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--brand);
  transform: translateX(-50%);
}

/* 右侧操作区 */
.nav__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 2px;
  flex: none;
}

.nav__icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-2);
  background: transparent;
  border: 0;
  cursor: pointer;
  border-radius: 50%;
  text-decoration: none;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav__icon:hover { color: var(--ink); background: var(--surface-2); }
.nav__icon svg { width: 18px; height: 18px; display: block; }

.nav__toggle {
  display: none;
  border: 0;
  background: none;
  width: 40px;
  height: 40px;
  cursor: pointer;
  border-radius: 50%;
  margin-left: 2px;
}
.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  border-radius: 1px;
  margin-inline: auto;
  position: relative;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.nav__toggle span::before,
.nav__toggle span::after { content: ""; position: absolute; left: 0; }
.nav__toggle span::before { top: -5px; }
.nav__toggle span::after { top: 5px; }
.nav__toggle[aria-expanded="true"] span { background: transparent; }
.nav__toggle[aria-expanded="true"] span::before { transform: translateY(5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span::after { transform: translateY(-5px) rotate(-45deg); }

/* ---------- 5. Hero ---------- */
.hero {
  position: relative;
  min-height: min(88vh, 860px);
  display: flex;
  align-items: flex-end;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.hero__media { position: absolute; inset: 0; z-index: -2; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; }
.hero__media.no-img {
  background:
    radial-gradient(120% 90% at 80% 10%, rgba(91, 148, 171, 0.55), transparent 60%),
    linear-gradient(160deg, #22384a 0%, #3f6e83 45%, #5b94ab 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.55) 0%, rgba(0, 0, 0, 0.15) 45%, rgba(0, 0, 0, 0.25) 100%);
}

.hero__inner { padding-block: var(--sp-16) var(--sp-12); max-width: 860px; }
.hero__kicker {
  font-size: var(--fs-14);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: var(--sp-4);
}
.hero__title {
  font-size: var(--fs-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
  margin-bottom: var(--sp-5);
  text-wrap: balance;
}
.hero__desc {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  line-height: 1.5;
  opacity: 0.92;
  max-width: 40em;
  margin-bottom: var(--sp-6);
}
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 12px 26px;
  font-size: var(--fs-16);
  font-weight: 500;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background 0.25s var(--ease), color 0.25s var(--ease);
}
.btn:active { transform: scale(0.97); }

.btn--primary { background: var(--brand); color: #fff; }
.btn--primary:hover { background: var(--brand-deep); box-shadow: var(--shadow-2); }

.btn--ghost { border-color: currentColor; color: inherit; background: transparent; }
.btn--ghost:hover { background: rgba(255, 255, 255, 0.14); }
.btn--ghost--dark:hover { background: var(--surface-2); }

.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: #000; box-shadow: var(--shadow-2); }

/* ---------- 7. 图文分栏 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
}
.split + .split { margin-top: var(--sp-12); }
.split--flip .split__media { order: 2; }

.split__media {
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-2);
  background: linear-gradient(150deg, #dfe9ee, #c6d7e0);
}
.split__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}
.split__media:hover img { transform: scale(1.03); }
.split__media--portrait { aspect-ratio: 3 / 4; }

.split__body h3 {
  font-size: var(--fs-h3);
  margin-bottom: var(--sp-3);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.split__body .headmark {
  width: 4px;
  height: 1.2em;
  border-radius: 2px;
  background: var(--brand);
  flex: none;
}
.split__body p { color: var(--ink-3); font-size: var(--fs-18); margin: 0; }

/* ---------- 8. 卡片 ---------- */
.card-grid {
  display: grid;
  gap: var(--sp-5);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  box-shadow: var(--shadow-1);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); }
.card__icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--brand-soft);
  color: var(--brand-deep);
  display: grid;
  place-items: center;
  margin-bottom: var(--sp-4);
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { font-size: var(--fs-24); margin-bottom: var(--sp-2); }
.card p { color: var(--ink-3); margin: 0; font-size: var(--fs-16); }
.card--alt { background: var(--surface-2); border-color: transparent; }

/* 案例卡 */
.case-card {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: flex-end;
  color: #fff;
  isolation: isolate;
  box-shadow: var(--shadow-1);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-3); }
.case-card__media { position: absolute; inset: 0; z-index: -2; }
.case-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s var(--ease); }
.case-card:hover .case-card__media img { transform: scale(1.05); }
.case-card__media.no-img {
  background:
    radial-gradient(100% 100% at 20% 0%, rgba(91, 148, 171, 0.6), transparent 60%),
    linear-gradient(150deg, #33495a, #5b94ab);
}
.case-card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.62), transparent 55%);
}
.case-card__body { padding: var(--sp-6); }
.case-card__body p { font-size: var(--fs-18); font-weight: 600; margin-bottom: var(--sp-2); }
.case-card__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-14);
  opacity: 0.9;
}
.case-card__cta::after { content: "→"; transition: transform 0.3s var(--ease); }
.case-card:hover .case-card__cta::after { transform: translateX(4px); }

/* 数据卡 */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--sp-5);
  text-align: center;
}
.stat__num {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--brand-deep);
  line-height: 1.1;
}
.stat__label { font-size: var(--fs-14); color: var(--ink-3); margin-top: var(--sp-1); }

/* ---------- 9. 步骤 / 时间线 ---------- */
.steps { counter-reset: step; display: grid; gap: var(--sp-5); }
.step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--sp-5);
  padding: var(--sp-5);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}
.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-size: var(--fs-24);
  font-weight: 700;
  color: var(--brand);
  font-variant-numeric: tabular-nums;
}
.step h3 { font-size: var(--fs-18); margin-bottom: var(--sp-1); }
.step p { color: var(--ink-3); margin: 0; font-size: var(--fs-16); }

/* ---------- 10. FAQ（原生 details） ---------- */
.faq { max-width: 760px; margin-inline: auto; display: grid; gap: var(--sp-3); }
.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: var(--sp-4) var(--sp-5);
  transition: box-shadow 0.3s var(--ease);
}
.faq details[open] { box-shadow: var(--shadow-1); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: var(--fs-18);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-4);
  min-height: 32px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-size: var(--fs-24);
  color: var(--brand);
  font-weight: 400;
  transition: transform 0.3s var(--ease);
  flex: none;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: var(--sp-3) 0 0; color: var(--ink-3); }

/* ---------- 11. 职位卡 ---------- */
.job-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-6);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.job-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); }
.job-card h3 { font-size: var(--fs-24); margin-bottom: var(--sp-1); }
.job-card .job-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
}
.tag {
  font-size: var(--fs-12);
  font-weight: 600;
  color: var(--brand-deep);
  background: var(--brand-soft);
  border-radius: var(--r-pill);
  padding: 4px 12px;
}

/* ---------- 12. 表单 ---------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
  max-width: 760px;
}
.form-field { display: grid; gap: var(--sp-2); }
.form-field--full { grid-column: 1 / -1; }
.form-field label { font-size: var(--fs-14); font-weight: 600; color: var(--ink-2); }
.form-field input,
.form-field select,
.form-field textarea {
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  width: 100%;
}
.form-field textarea { resize: vertical; min-height: 128px; }
.form-field input:hover,
.form-field select:hover,
.form-field textarea:hover { border-color: var(--ink-4); }
.form-field input:focus-visible,
.form-field select:focus-visible,
.form-field textarea:focus-visible {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px var(--brand-soft);
}
.form-note { font-size: var(--fs-12); color: var(--ink-4); }

/* ---------- 13. CTA 横幅 ---------- */
.cta-band {
  background: linear-gradient(150deg, var(--brand-deep), var(--brand));
  color: #fff;
  border-radius: var(--r-lg);
  padding: clamp(40px, 6vw, 72px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  box-shadow: var(--shadow-2);
}
.cta-band h2 { font-size: var(--fs-h2); margin-bottom: var(--sp-2); }
.cta-band p { margin: 0; opacity: 0.9; font-size: var(--fs-18); }
.cta-band .btn { background: #fff; color: var(--brand-deep); }
.cta-band .btn:hover { box-shadow: var(--shadow-3); }

/* ---------- 14. 页脚 ---------- */
.site-footer {
  background: var(--surface-2);
  border-top: 1px solid var(--line);
  padding-block: var(--sp-10) var(--sp-6);
  font-size: var(--fs-14);
  color: var(--ink-3);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-8);
  margin-bottom: var(--sp-8);
}
.footer-brand p { max-width: 32em; margin-top: var(--sp-3); }
.footer-col h3 {
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: var(--sp-3);
}
.footer-col li + li { margin-top: var(--sp-2); }
.footer-col a { transition: color 0.2s var(--ease); }
.footer-col a:hover { color: var(--brand-deep); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: var(--sp-5);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--sp-3);
  font-size: var(--fs-12);
  color: var(--ink-4);
}
.footer-bottom a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }
.footer-bottom a:hover { color: var(--brand-deep); }

/* ---------- 15. 页面 Hero（内页） ---------- */
.page-hero {
  padding-block: var(--sp-12) var(--sp-10);
  background:
    radial-gradient(90% 120% at 85% -20%, var(--brand-soft), transparent 60%),
    var(--surface-3);
  border-bottom: 1px solid var(--line);
}
.page-hero h1 { font-size: var(--fs-h1); margin-bottom: var(--sp-3); }
.page-hero .lead { font-size: var(--fs-18); color: var(--ink-3); max-width: 44em; margin: 0; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  font-size: var(--fs-12);
  color: var(--ink-4);
  margin-bottom: var(--sp-4);
}
.breadcrumb a:hover { color: var(--brand-deep); }
.breadcrumb li + li::before { content: "/"; margin-right: var(--sp-2); opacity: 0.6; }

/* ---------- 16. 滚动显现动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 17. 响应式 ---------- */
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .split--flip .split__media { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767px) {
  :root { --header-h: 48px; }
  .section { padding-block: var(--sp-10); }

  .nav__center { position: static; transform: none; }
  .nav__toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav__actions .nav__icon:not(.nav__toggle) { display: none; }
  .nav__list {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(255, 255, 255, 0.92);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--line);
    padding: var(--sp-3) var(--sp-4) var(--sp-5);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
  }
  .nav__list.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav__link { display: block; padding: var(--sp-3) var(--sp-2); font-size: var(--fs-18); }
  .nav__link[aria-current="page"]::after { display: none; }
  .nav__link[aria-current="page"] { color: var(--brand-deep); }

  .form-grid { grid-template-columns: 1fr; }
  .step { grid-template-columns: 40px 1fr; gap: var(--sp-4); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-6); }
  .hero__inner { padding-block: var(--sp-12) var(--sp-8); }
}

/* ---------- 18. 无障碍：减弱动效 ---------- */
@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;
  }
  .reveal { opacity: 1; transform: none; }
}