/* ============================================================
   完美体育APP CN — /assets/site.css
   全站共享样式：Reset、设计变量、排版、头部、页脚、通用组件
   ============================================================ */

/* ---------- 1. Reset 与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Roboto', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background: var(--background-dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
  word-break: normal;
}

[hidden] {
  display: none !important;
}

main,
#main-content {
  flex: 1 0 auto;
  width: 100%;
  outline: none;
}

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

ul,
ol {
  list-style: none;
}

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

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

:focus-visible {
  outline: 3px solid var(--highlight-green);
  outline-offset: 2px;
}

[id] {
  scroll-margin-top: 96px;
}

::selection {
  background: var(--bright-orange);
  color: #fff;
}

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色彩系统 */
  --deep-space-blue: #0b1b3a;
  --primary-blue: #14233d;
  --bright-orange: #ff6b2c;
  --highlight-green: #2ee59d;
  --text-primary: #ffffff;
  --text-secondary: #b0c4de;
  --background-dark: #060b14;
  --surface-light: #f5f7fa;

  /* 功能派生色 */
  --orange-soft: rgba(255, 107, 44, 0.14);
  --green-glow: rgba(46, 229, 157, 0.45);
  --line-subtle: rgba(176, 196, 222, 0.18);
  --line-strong: rgba(255, 107, 44, 0.45);

  /* 字体 */
  --font-headings: 'Montserrat', 'Poppins', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Roboto', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;

  /* 字号 */
  --text-hero: clamp(44px, 8vw, 72px);
  --text-section: clamp(30px, 5vw, 48px);
  --text-subsection: clamp(22px, 3.5vw, 32px);
  --text-caption: 14px;

  /* 布局 */
  --container-max: 1280px;
  --content-max: 780px;
  --space-section: clamp(64px, 10vw, 112px);

  /* 形状与阴影 */
  --border-thick: 3px;
  --border-med: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-heavy: 0 12px 32px rgba(0, 0, 0, 0.45);
  --shadow-card: 6px 6px 0 rgba(0, 0, 0, 0.45);
}

/* ---------- 3. 排版 ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-headings);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.6em;
  text-wrap: balance;
}

p,
li {
  color: var(--text-secondary);
}

.hero-title {
  font-size: var(--text-hero);
}

.section-title {
  font-size: var(--text-section);
}

.subsection-title {
  font-size: var(--text-subsection);
}

.caption {
  font-size: var(--text-caption);
  color: var(--text-secondary);
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-headings);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bright-orange);
  margin-bottom: 10px;
}

/* ---------- 4. 容器与区块 ---------- */
.container {
  width: min(var(--container-max), 100% - 48px);
  margin-inline: auto;
}

@media (max-width: 480px) {
  .container {
    width: calc(100% - 32px);
  }
}

.section {
  padding: var(--space-section) 0;
}

.section-tight {
  padding: clamp(40px, 6vw, 72px) 0;
}

.section-dark {
  background: var(--background-dark);
}

.section-deep {
  background: var(--deep-space-blue);
  position: relative;
  clip-path: polygon(0 0, 100% 1.5%, 100% 98.5%, 0 100%);
}

.content {
  max-width: var(--content-max);
  margin-inline: auto;
  color: var(--text-secondary);
}

.content a {
  color: var(--highlight-green);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
  transition: color 0.2s, text-decoration-color 0.2s;
}

.content a:hover {
  color: var(--bright-orange);
  text-decoration-color: var(--bright-orange);
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-family: var(--font-headings);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s, color 0.2s, border-color 0.2s;
}

.btn:focus-visible {
  outline: 3px solid var(--highlight-green);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--bright-orange);
  border-color: var(--bright-orange);
  color: #fff;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.4);
}

.btn-primary:hover {
  transform: translate(2px, 2px);
  box-shadow: none;
  background: #e0541c;
}

.btn-secondary {
  background: transparent;
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.btn-secondary:hover {
  border-color: var(--highlight-green);
  color: var(--highlight-green);
}

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

.btn-outline:hover {
  background: var(--orange-soft);
}

.btn-large {
  padding: 16px 36px;
  font-size: 16px;
}

/* ---------- 6. 面包屑 ---------- */
.breadcrumb {
  margin-bottom: 24px;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  margin-right: 8px;
  color: var(--bright-orange);
  font-weight: 700;
}

.breadcrumb a:hover {
  color: var(--bright-orange);
}

.breadcrumb [aria-current='page'] {
  color: var(--text-primary);
}

/* ---------- 7. 栅格 ---------- */
.grid {
  display: grid;
  gap: 24px;
}

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

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

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

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ---------- 8. 品牌锁线 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  font-family: var(--font-headings);
  font-weight: 900;
  font-size: 26px;
  line-height: 1;
  color: #fff;
  background: linear-gradient(135deg, var(--bright-orange), #d94412);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 50% 100%, 0 72%);
  box-shadow: 3px 4px 0 rgba(0, 0, 0, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.15;
}

.brand-text strong {
  font-family: var(--font-headings);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: #fff;
}

.brand-text small {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ---------- 9. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(180deg, var(--deep-space-blue) 0%, var(--primary-blue) 130%);
  border-bottom: var(--border-thick) solid var(--bright-orange);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
}

.header-topline {
  background: linear-gradient(90deg, var(--primary-blue) 0%, var(--deep-space-blue) 100%);
  border-bottom: 1px solid var(--line-subtle);
  overflow: hidden;
}

.header-topline-inner {
  display: flex;
  align-items: center;
  min-height: 36px;
  gap: 12px;
}

.header-tagline {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-tagline::before {
  content: '';
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  background: var(--highlight-green);
  box-shadow: 0 0 10px var(--green-glow);
  transform: rotate(45deg);
  animation: live-pulse 2s ease-in-out infinite;
}

@keyframes live-pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

.header-main-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 78px;
}

/* ---------- 10. 主导航 ---------- */
.site-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: inline-block;
  padding: 10px 14px;
  font-family: var(--font-headings);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color 0.2s, background-color 0.2s;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: var(--border-thick);
  background: var(--bright-orange);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current='page'] {
  color: #fff;
  background: var(--orange-soft);
}

.nav-link[aria-current='page']::after {
  transform: scaleX(1);
}

/* ---------- 11. 头部行动点与汉堡按钮 ---------- */
.btn-header-cta {
  margin-left: 4px;
  padding: 10px 18px;
  font-size: 13px;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 46px;
  height: 46px;
  background: transparent;
  border: 2px solid var(--text-secondary);
  border-radius: var(--radius-sm);
  margin-left: auto;
  flex-shrink: 0;
  transition: border-color 0.2s;
}

.nav-toggle:hover {
  border-color: var(--bright-orange);
}

.nav-toggle-bar {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 12. 滚动进度与导航遮罩 ---------- */
.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--bright-orange) 0%, var(--highlight-green) 100%);
  box-shadow: 0 0 8px var(--green-glow);
  z-index: 3;
  transition: width 0.1s linear;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 11, 20, 0.65);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  z-index: 998;
}

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  background: var(--background-dark);
  color: var(--text-secondary);
  border-top: none;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: repeating-linear-gradient(
    -45deg,
    var(--bright-orange) 0 14px,
    var(--primary-blue) 14px 28px
  );
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr) minmax(0, 0.8fr) minmax(0, 1.1fr);
  gap: 48px;
  padding: 72px 0 56px;
}

.footer-brand .brand {
  margin-bottom: 16px;
}

.footer-trust {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 36em;
}

.footer-heading {
  font-family: var(--font-headings);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bright-orange);
  margin-bottom: 20px;
  padding-bottom: 10px;
  position: relative;
}

.footer-heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  background: var(--bright-orange);
}

.footer-links,
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-links a:hover {
  color: var(--highlight-green);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer-contact li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 9px;
  background: var(--highlight-green);
  transform: rotate(45deg);
}

.footer-bottom {
  border-top: 1px solid var(--line-subtle);
  background: var(--primary-blue);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: 16px 0;
}

.footer-bottom p {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

.footer-icp {
  font-variant-numeric: tabular-nums;
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 56px 0 40px;
  }
}

/* ---------- 14. 卡片 ---------- */
.card {
  background: linear-gradient(180deg, var(--primary-blue) 0%, var(--deep-space-blue) 120%);
  border: var(--border-med) solid var(--line-strong);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  padding: 28px;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--bright-orange);
  box-shadow: 8px 8px 0 rgba(255, 107, 44, 0.28);
}

.card-title {
  font-family: var(--font-headings);
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
}

.card p,
.card li {
  font-size: 15px;
  color: var(--text-secondary);
}

/* ---------- 15. 图片容器 ---------- */
.image-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.05) 0 12px, transparent 12px 24px),
    var(--primary-blue);
  border: var(--border-med) solid var(--line-strong);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
}

.image-frame[data-ratio='4/3'] {
  aspect-ratio: 4 / 3;
}

.image-frame[data-ratio='3/2'] {
  aspect-ratio: 3 / 2;
}

.image-frame[data-ratio='1/1'] {
  aspect-ratio: 1 / 1;
}

.image-frame[data-ratio='21/9'] {
  aspect-ratio: 21 / 9;
}

.image-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.image-frame:hover img {
  transform: scale(1.03);
}

.image-frame[data-label]::after {
  content: attr(data-label);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-headings);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: linear-gradient(135deg, rgba(11, 27, 58, 0.25) 0%, rgba(6, 11, 20, 0.5) 100%);
}

/* ---------- 16. 标签页 ---------- */
.tabs {
  margin-top: 32px;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 2px solid var(--line-strong);
  margin-bottom: 28px;
}

.tab-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: var(--border-med) solid transparent;
  border-bottom: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-headings);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  transition: color 0.2s, background-color 0.2s, border-color 0.2s;
}

.tab-button:hover {
  color: var(--text-primary);
  background: var(--orange-soft);
}

.tab-button[aria-selected='true'] {
  color: var(--highlight-green);
  background: var(--deep-space-blue);
  border-color: var(--line-strong);
  border-bottom-color: var(--deep-space-blue);
}

.tab-panel {
  padding: 24px;
  background: rgba(20, 35, 61, 0.35);
  border: 1px solid var(--line-subtle);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  color: var(--text-secondary);
}

.tab-panel[hidden] {
  display: none;
}

/* ---------- 17. 手风琴 ---------- */
.accordion {
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-sm);
}

.accordion-item {
  border-bottom: 1px solid var(--line-subtle);
  transition: background-color 0.2s;
}

.accordion-item:last-child {
  border-bottom: 0;
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-headings);
  font-size: 16px;
  font-weight: 700;
  text-align: left;
  line-height: 1.4;
  cursor: pointer;
  transition: background-color 0.2s;
}

.accordion-trigger:hover {
  background: var(--orange-soft);
}

.accordion-trigger::after {
  content: '＋';
  flex-shrink: 0;
  font-size: 18px;
  color: var(--bright-orange);
  transition: transform 0.25s;
}

.accordion-item[data-open] .accordion-trigger::after {
  transform: rotate(45deg);
}

.accordion-panel {
  display: none;
  padding: 0 20px 18px;
  color: var(--text-secondary);
  font-size: 15px;
}

.accordion-item[data-open] .accordion-panel {
  display: block;
}

/* ---------- 18. 步骤条 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.step {
  position: relative;
  padding: 24px;
  background: var(--primary-blue);
  border: var(--border-med) solid var(--line-subtle);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s, transform 0.2s;
}

.step:hover {
  border-color: var(--bright-orange);
  transform: translateY(-4px);
}

.step-indicator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  font-family: var(--font-headings);
  font-weight: 900;
  font-size: 18px;
  color: #fff;
  background: linear-gradient(135deg, var(--bright-orange), #d94412);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 50% 100%, 0 72%);
}

.step h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

/* ---------- 19. 统计块与清单 ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-headings);
  font-size: 52px;
  font-weight: 900;
  line-height: 1;
  color: var(--bright-orange);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

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

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-secondary);
}

.check-list li::before {
  content: '';
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  margin-top: 8px;
  background: var(--highlight-green);
  transform: rotate(45deg);
}

/* ---------- 20. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- 21. 响应式：平板与手机 ---------- */
@media (max-width: 960px) {
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(340px, 86vw);
    margin: 0;
    padding: 96px 28px 32px;
    background: linear-gradient(165deg, var(--primary-blue) 0%, var(--deep-space-blue) 130%);
    border-left: var(--border-thick) solid var(--bright-orange);
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
    transform: translateX(105%);
    visibility: hidden;
    overflow-y: auto;
    z-index: 1000;
    transition:
      transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
      visibility 0s linear 0.35s;
  }

  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition:
      transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
      visibility 0s linear 0s;
  }

  .nav-list {
    flex-direction: column;
    gap: 4px;
  }

  .nav-link {
    display: block;
    padding: 16px 12px;
    font-size: 17px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--line-subtle);
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current='page'] {
    background: var(--orange-soft);
    color: var(--bright-orange);
  }

  .nav-toggle {
    display: flex;
  }
}

@media (max-width: 768px) {
  .header-topline-inner {
    min-height: 30px;
  }

  .header-tagline {
    font-size: 11px;
  }

  .header-main-inner {
    min-height: 66px;
    gap: 10px;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
    font-size: 22px;
  }

  .brand-text strong {
    font-size: 18px;
  }

  .brand-text small {
    font-size: 9px;
  }

  .btn-header-cta {
    padding: 8px 14px;
    font-size: 12px;
  }

  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* ---------- 22. 无障碍与降级 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: -9999px;
  z-index: 9999;
  background: var(--bright-orange);
  color: #fff;
  font-family: var(--font-headings);
  font-weight: 700;
  font-size: 14px;
  padding: 12px 24px;
  border-radius: 0 0 6px 0;
  box-shadow: var(--shadow-heavy);
}

.skip-link:focus {
  left: 0;
}

@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;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}