/* =====================================================
   星空体育APP · 全站共享样式
   ===================================================== */

/* ---------- 01 设计变量 ---------- */
:root {
  --c-space: #0B1E3F;
  --c-space-deep: #132A52;
  --c-gold: #F5C542;
  --c-orange: #FF6B35;
  --c-rock: #8A8D8F;
  --c-moss: #5B8A72;
  --c-terra: #C1704D;
  --c-cream: #F5F0E6;

  --font-head: 'Orbitron', 'Chakra Petch', 'DIN Alternate', 'Bahnschrift', 'PingFang SC', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-md: 1rem;
  --text-lg: 1.1875rem;
  --text-xl: 1.5rem;
  --text-2xl: 2.25rem;
  --text-3xl: 3.25rem;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;

  --container: 1200px;
  --header-h: 72px;
  --radius: 4px;
  --radius-lg: 10px;

  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-1: 0.25s;
  --dur-2: 0.5s;

  --z-header: 100;
  --z-top: 200;
}

/* ---------- 02 Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: 1.75;
  color: var(--c-cream);
  background-color: var(--c-space);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-cream);
  margin-bottom: 0.5em;
}

p {
  margin-bottom: 1rem;
}

strong {
  font-weight: 600;
}

::selection {
  background: rgba(245, 197, 66, 0.75);
  color: var(--c-space);
}

:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
  border-radius: 2px;
}

#main-content {
  flex: 1 0 auto;
  width: 100%;
}

/* ---------- 03 工具类 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.text-link {
  color: var(--c-gold);
  text-decoration: underline;
  text-decoration-color: rgba(245, 197, 66, 0.4);
  text-underline-offset: 4px;
  transition: color var(--dur-1), text-decoration-color var(--dur-1);
}

.text-link:hover {
  color: var(--c-orange);
  text-decoration-color: var(--c-orange);
}

/* ---------- 04 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.375rem;
  font-family: var(--font-head);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background var(--dur-1) var(--ease-out),
    color var(--dur-1) var(--ease-out),
    border-color var(--dur-1) var(--ease-out),
    transform var(--dur-1) var(--ease-out),
    box-shadow var(--dur-1) var(--ease-out);
}

.btn-gold {
  background: var(--c-gold);
  color: var(--c-space);
}

.btn-gold:hover {
  background: var(--c-orange);
  color: var(--c-cream);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(245, 197, 66, 0.35);
}

.btn-outline {
  background: transparent;
  border-color: rgba(245, 197, 66, 0.6);
  color: var(--c-gold);
}

.btn-outline:hover {
  background: rgba(245, 197, 66, 0.1);
  border-color: var(--c-gold);
}

.btn-orange {
  background: var(--c-orange);
  color: var(--c-cream);
}

.btn-orange:hover {
  background: #E85A28;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
}

.btn-new::after {
  content: '→';
  margin-left: 0.375rem;
  font-weight: 400;
  transition: transform var(--dur-1) var(--ease-out);
}

.btn-new:hover::after {
  transform: translateX(3px);
}

/* ---------- 05 跳过链接与滚动进度 ---------- */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: calc(var(--z-top) + 10);
  padding: 0.75rem 1.25rem;
  background: var(--c-gold);
  color: var(--c-space);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius);
  transition: top var(--dur-1) var(--ease-out);
}

.skip-link:focus {
  top: 1rem;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--c-gold), var(--c-orange));
  border-radius: 0 2px 2px 0;
  z-index: calc(var(--z-top) + 5);
  pointer-events: none;
}

/* ---------- 06 头部 ---------- */
.site-header {
  background: var(--c-space);
  position: relative;
  z-index: var(--z-header);
  box-shadow: 0 1px 0 rgba(245, 197, 66, 0.08);
}

.header-topbar {
  background: var(--c-space-deep);
  border-bottom: 1px solid rgba(245, 197, 66, 0.1);
}

.header-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  min-height: 36px;
}

.header-slogan {
  font-family: var(--font-head);
  font-size: var(--text-xs);
  color: var(--c-cream);
  letter-spacing: 0.08em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-trust {
  font-size: var(--text-xs);
  color: var(--c-rock);
  white-space: nowrap;
}

.header-mainbar-wrap {
  position: relative;
  background: var(--c-space);
}

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

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--c-gold) 0%, var(--c-orange) 100%);
  clip-path: polygon(50% 0%, 61% 35%, 100% 50%, 61% 65%, 50% 100%, 39% 65%, 0% 50%, 39% 35%);
  box-shadow: 0 0 12px rgba(245, 197, 66, 0.35);
}

.brand-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  color: var(--c-cream);
  white-space: nowrap;
}

.brand-suffix {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--c-gold);
  margin-left: 0.375rem;
  letter-spacing: 0.08em;
}

/* ---------- 07 导航 ---------- */
.site-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 0.875rem;
  font-family: var(--font-head);
  font-size: 0.9375rem;
  color: var(--c-cream);
  text-decoration: none;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  position: relative;
  transition: color var(--dur-1) var(--ease-out);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0.875rem;
  right: 0.875rem;
  bottom: 0.25rem;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-orange));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-2) var(--ease-out);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-gold);
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--c-gold);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.nav-cta {
  display: none;
  margin-top: var(--space-sm);
  width: 100%;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(245, 197, 66, 0.35);
  border-radius: var(--radius);
  background: rgba(245, 197, 66, 0.06);
  transition:
    border-color var(--dur-1) var(--ease-out),
    background var(--dur-1) var(--ease-out);
}

.nav-toggle:hover {
  border-color: var(--c-gold);
  background: rgba(245, 197, 66, 0.12);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 1px;
  background: var(--c-gold);
  transition: transform var(--dur-1) var(--ease-out), opacity var(--dur-1) var(--ease-out);
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 流星轨迹装饰 */
.header-meteor {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
  background: rgba(245, 197, 66, 0.06);
}

.meteor-line {
  display: block;
  width: 30%;
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--c-gold), var(--c-orange), transparent);
  transform: translateX(-120%);
  animation: meteor-flow 4.5s var(--ease-out) infinite;
}

@keyframes meteor-flow {
  0%   { transform: translateX(-120%); }
  35%  { transform: translateX(330%); }
  100% { transform: translateX(330%); }
}

/* ---------- 08 页脚 ---------- */
.site-footer {
  background: var(--c-space-deep);
  border-top: 1px solid rgba(245, 197, 66, 0.1);
  position: relative;
  margin-top: auto;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 5%, var(--c-gold) 50%, var(--c-orange) 95%);
  opacity: 0.35;
  pointer-events: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-lg);
  padding-block: var(--space-xl);
}

.footer-brand-col .brand-footer {
  margin-bottom: var(--space-sm);
}

.brand-footer .brand-logo {
  width: 30px;
  height: 30px;
}

.brand-footer .brand-name {
  font-size: 1.125rem;
}

.footer-desc {
  font-size: var(--text-sm);
  color: rgba(245, 240, 230, 0.75);
  line-height: 1.8;
}

.footer-trust {
  font-size: var(--text-xs);
  color: var(--c-gold);
  background: rgba(245, 197, 66, 0.08);
  border-left: 3px solid var(--c-gold);
  padding: 0.625rem 0.875rem;
  margin-top: var(--space-sm);
  line-height: 1.7;
}

.footer-title {
  font-size: 0.9375rem;
  color: var(--c-gold);
  font-family: var(--font-head);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(245, 197, 66, 0.18);
  position: relative;
}

.footer-title::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 42px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-orange));
}

.footer-links li {
  margin-bottom: 0.375rem;
}

.footer-links a {
  color: rgba(245, 240, 230, 0.8);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: color var(--dur-1), padding-left var(--dur-1);
}

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

.footer-worktime {
  font-size: var(--text-xs);
  color: var(--c-rock);
  margin-top: var(--space-sm);
  line-height: 1.7;
}

.footer-contact li {
  display: flex;
  flex-direction: column;
  margin-bottom: 0.625rem;
  font-size: var(--text-sm);
  color: rgba(245, 240, 230, 0.85);
  line-height: 1.6;
  word-break: break-all;
}

.contact-label {
  font-size: var(--text-xs);
  color: var(--c-rock);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.125rem;
}

.footer-bottom {
  background: var(--c-space);
  border-top: 1px solid rgba(245, 197, 66, 0.1);
  padding-block: var(--space-sm);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--c-rock);
}

.footer-icp {
  font-size: var(--text-xs);
  color: var(--c-gold);
  letter-spacing: 0.04em;
}

.footer-bottom-inner a {
  font-size: var(--text-xs);
  color: var(--c-rock);
  text-decoration: none;
  transition: color var(--dur-1);
}

.footer-bottom-inner a:hover {
  color: var(--c-gold);
}

/* ---------- 09 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 1.5rem;
  z-index: calc(var(--z-top) - 10);
  width: 48px;
  height: 48px;
  background: var(--c-space-deep);
  border: 1px solid rgba(245, 197, 66, 0.4);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition:
    opacity var(--dur-2) var(--ease-out),
    visibility var(--dur-2),
    transform var(--dur-2) var(--ease-out),
    background var(--dur-1),
    color var(--dur-1);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--c-gold);
  color: var(--c-space);
  border-color: var(--c-gold);
}

.back-to-top-icon {
  font-size: 1.2rem;
  line-height: 1;
  display: block;
}

/* ---------- 10 布局结构 ---------- */
.section {
  padding-block: clamp(2.5rem, 7vw, 5rem);
}

.section-head {
  margin-bottom: var(--space-lg);
  max-width: 680px;
}

.section-kicker {
  display: inline-block;
  font-family: var(--font-head);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 0.625rem;
  padding-left: 2rem;
  position: relative;
}

.section-kicker::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 1.25rem;
  height: 2px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-orange));
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.25;
  margin-bottom: var(--space-sm);
}

.section-title .highlight {
  color: var(--c-gold);
}

.section-subtitle {
  color: var(--c-rock);
  font-size: var(--text-lg);
  line-height: 1.8;
}

.grid {
  display: grid;
  gap: var(--space-md);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 11 页面头部 / 面包屑 ---------- */
.page-header {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 4vw, 2.5rem);
  background: linear-gradient(180deg, var(--c-space-deep) 0%, var(--c-space) 100%);
  border-bottom: 1px solid rgba(245, 197, 66, 0.1);
}

.page-header::after {
  content: '';
  position: absolute;
  right: -80px;
  top: -80px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(245, 197, 66, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.page-title {
  font-size: clamp(1.75rem, 4.5vw, 3rem);
  margin-bottom: 0.625rem;
}

.page-intro {
  color: var(--c-rock);
  max-width: 720px;
  font-size: var(--text-lg);
  line-height: 1.8;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  font-size: var(--text-sm);
  color: var(--c-rock);
  padding-block: var(--space-sm);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb li + li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--c-gold);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.breadcrumb a {
  color: var(--c-rock);
  text-decoration: none;
  transition: color var(--dur-1);
}

.breadcrumb a:hover {
  color: var(--c-gold);
}

.breadcrumb [aria-current="page"] {
  color: var(--c-cream);
}

/* ---------- 12 面板 / 卡片 ---------- */
.panel {
  background: var(--c-space-deep);
  border: 1px solid rgba(245, 197, 66, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
}

.panel-cut {
  background:
    linear-gradient(var(--c-space-deep), var(--c-space-deep)) padding-box,
    linear-gradient(135deg, rgba(245, 197, 66, 0.55), rgba(255, 107, 53, 0.3)) border-box;
  border: 1px solid transparent;
  border-radius: 0;
  padding: var(--space-md);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.card {
  background: var(--c-space-deep);
  border: 1px solid rgba(245, 197, 66, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    transform var(--dur-2) var(--ease-out),
    border-color var(--dur-2),
    box-shadow var(--dur-2);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 197, 66, 0.4);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
}

.card-media {
  position: relative;
}

.card-body {
  padding: var(--space-md);
}

.card-title {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.card-text {
  font-size: var(--text-sm);
  color: rgba(245, 240, 230, 0.75);
  line-height: 1.7;
}

/* ---------- 13 仪表板数据 ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-sm);
}

.stat-card {
  background: var(--c-space-deep);
  border-left: 3px solid var(--c-gold);
  border-radius: var(--radius);
  padding: var(--space-md);
  position: relative;
}

.stat-value {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--c-gold);
  line-height: 1.2;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--c-rock);
  margin-top: 0.25rem;
  letter-spacing: 0.04em;
}

.stat-up {
  color: var(--c-moss);
}

.stat-down {
  color: var(--c-terra);
}

/* ---------- 14 标签 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  border-radius: 2px;
  line-height: 1.5;
  border: 1px solid transparent;
}

.badge-new {
  background: rgba(255, 107, 53, 0.15);
  color: var(--c-orange);
  border-color: rgba(255, 107, 53, 0.4);
}

.badge-up {
  background: rgba(91, 138, 114, 0.15);
  color: var(--c-moss);
  border-color: rgba(91, 138, 114, 0.4);
}

.badge-warn {
  background: rgba(193, 112, 77, 0.15);
  color: var(--c-terra);
  border-color: rgba(193, 112, 77, 0.4);
}

.badge-old {
  background: rgba(138, 141, 143, 0.12);
  color: var(--c-rock);
  border-color: rgba(138, 141, 143, 0.4);
}

/* ---------- 15 图片容器 ---------- */
.img-ratio {
  position: relative;
  overflow: hidden;
  background: var(--c-space-deep);
}

.img-ratio::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    135deg,
    rgba(245, 197, 66, 0.08),
    rgba(255, 107, 53, 0.04) 40%,
    transparent 60%
  );
}

.img-ratio img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-2) var(--ease-out);
}

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

.img-ratio-16x9 { aspect-ratio: 16 / 9; }
.img-ratio-4x3 { aspect-ratio: 4 / 3; }
.img-ratio-3x2 { aspect-ratio: 3 / 2; }
.img-ratio-square { aspect-ratio: 1 / 1; }

/* ---------- 16 滚动动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.7s var(--ease-out),
    transform 0.7s var(--ease-out);
  will-change: opacity, transform;
}

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

[data-reveal="left"] {
  transform: translateX(-28px);
}

[data-reveal="right"] {
  transform: translateX(28px);
}

[data-reveal="left"].is-revealed,
[data-reveal="right"].is-revealed {
  transform: none;
}

[data-chapter-link].is-active {
  color: var(--c-gold);
}

/* ---------- 17 响应式 ---------- */
@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }

  .nav-cta {
    display: none;
  }
}

@media (max-width: 1023px) {
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--c-space-deep);
    padding: var(--space-sm) clamp(1rem, 4vw, 2rem) var(--space-md);
    border-top: 1px solid rgba(245, 197, 66, 0.12);
    border-bottom: 1px solid rgba(245, 197, 66, 0.12);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition:
      opacity var(--dur-2) var(--ease-out),
      transform var(--dur-2) var(--ease-out),
      visibility 0s linear var(--dur-2);
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition:
      opacity var(--dur-2) var(--ease-out),
      transform var(--dur-2) var(--ease-out),
      visibility 0s;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    display: block;
    padding: 0.75rem 1rem;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius) var(--radius) 0;
  }

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

  .nav-link:hover,
  .nav-link[aria-current="page"] {
    background: rgba(245, 197, 66, 0.08);
    border-left-color: var(--c-gold);
    color: var(--c-gold);
  }

  .nav-cta {
    display: flex;
    width: 100%;
  }

  .btn-new {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    padding-block: var(--space-lg);
  }
}

@media (max-width: 767px) {
  .header-trust {
    display: none;
  }

  .header-topbar-inner {
    justify-content: center;
  }

  .header-slogan {
    font-size: 0.7rem;
  }

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

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

@media (max-width: 480px) {
  .brand-logo {
    width: 32px;
    height: 32px;
  }

  .brand-name {
    font-size: 1.0625rem;
  }
}

/* ---------- 18 降级偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .meteor-line {
    animation: none;
    opacity: 0.4;
  }

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

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

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