/* ============================================================
   YAXING SPORT · 亚星体育 全站共享样式
   文件：/assets/site.css
   概念：竞技数据控制台 / 斜切分割 / 荧光绿 + 电光蓝
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --bg-primary: #0A0E14;
  --bg-secondary: #121A24;
  --bg-card: #1A2634;
  --accent-green: #C8FF00;
  --accent-blue: #00D4FF;
  --accent-red: #FF3B30;
  --text-primary: #F0F4F8;
  --text-secondary: #8A94A6;
  --green-transparent: rgba(200, 255, 0, 0.15);
  --blue-transparent: rgba(0, 212, 255, 0.15);
  --hover-bg: #1A2634;

  --font-heading: "DIN Condensed", "Oswald", "Impact", "Arial Narrow", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "Roboto Mono", "SF Mono", "Consolas", "Menlo", monospace;

  --container-max: 1280px;
  --gutter: clamp(20px, 4vw, 48px);
  --header-h: 76px;
  --header-h-mobile: 64px;
  --section-gap: clamp(64px, 10vw, 128px);

  --border-dim: 1px solid rgba(240, 244, 248, 0.08);
  --border-bright: 1px solid rgba(240, 244, 248, 0.16);
  --border-green: 1px solid rgba(200, 255, 0, 0.4);
  --border-blue: 1px solid rgba(0, 212, 255, 0.4);
  --shadow-card: 0 18px 50px rgba(0, 0, 0, 0.35);

  --ease: cubic-bezier(0.23, 1, 0.32, 1);
  --speed: 0.3s;
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  scrollbar-color: var(--bg-card) var(--bg-primary);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

body.nav-open { overflow: hidden; }

img, svg, video { display: block; max-width: 100%; height: auto; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }

::selection { background: var(--accent-green); color: var(--bg-primary); }

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

/* ---------- 基础排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  text-rendering: optimizeLegibility;
}
h1 { font-size: clamp(48px, 8vw, 96px); line-height: 1.1; }
h2 { font-size: clamp(32px, 5vw, 48px); line-height: 1.2; }
h3 { font-size: clamp(22px, 3vw, 28px); line-height: 1.3; }
p { margin-bottom: 1rem; }
strong { color: var(--text-primary); font-weight: 700; }

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

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.2;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-green);
}
.kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--accent-green);
}

.page-lead {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 62ch;
}

.hl-green { color: var(--accent-green); }
.hl-blue { color: var(--accent-blue); }
.hl-red { color: var(--accent-red); }

.metric {
  font-family: var(--font-heading);
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}
.metric .unit {
  font-family: var(--font-mono);
  font-size: 0.48em;
  font-weight: 400;
  color: var(--text-secondary);
  margin-left: 6px;
  letter-spacing: 0.08em;
}

/* ---------- 通用布局 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.main-content { min-height: 70vh; }

.section {
  position: relative;
  padding-block: var(--section-gap);
}
.section-heading { margin-bottom: clamp(24px, 4vw, 48px); }
.section-number {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(48px, 8vw, 96px);
  line-height: 0.9;
  color: rgba(240, 244, 248, 0.12);
  margin-bottom: 8px;
}
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  text-transform: uppercase;
}
.section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-green);
}

.slant-bar {
  display: block;
  width: 88px;
  height: 6px;
  background: linear-gradient(120deg, var(--accent-green) 0 55%, var(--accent-blue) 55% 100%);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 2000;
  background: var(--accent-green);
  color: var(--bg-primary);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 12px 22px;
  transition: top var(--speed) var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 头部 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1200;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--speed) var(--ease), border-color var(--speed) var(--ease), height var(--speed) var(--ease);
}
.site-header[data-scrolled],
.site-header[data-nav-open] {
  background: var(--bg-primary);
  border-bottom-color: var(--border-dim);
}

.header-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 100%;
}

.header-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-green) 0%, var(--accent-blue) 100%);
  transform: scaleX(0);
  transform-origin: left center;
  z-index: 3;
}

/* ---------- 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--green-transparent);
  border: 1px solid var(--accent-green);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}
.brand-mark::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: var(--accent-green);
}
.brand-mark-core {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent-green);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.brand-name {
  font-family: var(--font-heading);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}
.brand-sub {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.brand-footer .brand-mark {
  background: var(--green-transparent);
}

/* ---------- 导航（桌面） ---------- */
.site-nav { margin-left: auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-item a {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  border-bottom: 2px solid transparent;
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
.nav-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  opacity: 0.75;
  transition: color var(--speed) var(--ease), opacity var(--speed) var(--ease);
}
.nav-item a:hover,
.nav-item a[aria-current="page"] {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
}
.nav-item a:hover .nav-index,
.nav-item a[aria-current="page"] .nav-index {
  color: var(--accent-green);
  opacity: 1;
}

/* ---------- 头部工具区 ---------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.header-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: var(--text-primary);
  background: rgba(10, 14, 20, 0.35);
  border: 1px solid var(--border-bright);
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease), background var(--speed) var(--ease);
}
.header-icon-btn:hover {
  color: var(--accent-green);
  border-color: var(--accent-green);
  background: var(--green-transparent);
}
.bookmark-btn:hover {
  color: var(--accent-blue);
  border-color: var(--accent-blue);
  background: var(--blue-transparent);
}
.header-icon-btn .icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.header-cta { flex-shrink: 0; }

/* ---------- 移动菜单按钮 ---------- */
.nav-toggle {
  display: none;
  position: relative;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  width: 44px;
  height: 44px;
  z-index: 3;
}
.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--speed) var(--ease), opacity var(--speed) var(--ease), background-color var(--speed) var(--ease);
}
.nav-toggle-line + .nav-toggle-line { margin-top: 5px; }
.nav-toggle:hover .nav-toggle-line { background: var(--accent-green); }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--accent-green);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--accent-green);
}

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--border-bright);
  clip-path: polygon(12px 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  transition: background var(--speed) var(--ease), border-color var(--speed) var(--ease), color var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 2px solid var(--accent-blue); outline-offset: 3px; }
.btn-arrow { font-family: var(--font-body); font-size: 20px; line-height: 0; }

.btn-green { background: var(--accent-green); border-color: var(--accent-green); color: var(--bg-primary); }
.btn-green:hover { background: #DBFF57; border-color: #DBFF57; color: var(--bg-primary); }
.btn-blue { background: var(--accent-blue); border-color: var(--accent-blue); color: var(--bg-primary); }
.btn-blue:hover { background: #33DDFF; border-color: #33DDFF; color: var(--bg-primary); }
.btn-ghost { background: transparent; border-color: var(--border-bright); color: var(--text-primary); }
.btn-ghost:hover { background: var(--green-transparent); border-color: var(--accent-green); color: var(--accent-green); }
.btn-sm {
  padding: 9px 18px;
  font-size: 12px;
  letter-spacing: 0.1em;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  padding-top: calc(var(--header-h) + 28px);
  margin-bottom: 24px;
}
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}
.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  opacity: 0.5;
}
.breadcrumb-link { color: var(--text-secondary); transition: color var(--speed) var(--ease); }
.breadcrumb-link:hover { color: var(--accent-green); }
.breadcrumb-current { color: var(--text-primary); font-weight: 600; }

/* ---------- 12列动态网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}
.g-1 { grid-column: span 1; }
.g-2 { grid-column: span 2; }
.g-3 { grid-column: span 3; }
.g-4 { grid-column: span 4; }
.g-5 { grid-column: span 5; }
.g-6 { grid-column: span 6; }
.g-7 { grid-column: span 7; }
.g-8 { grid-column: span 8; }
.g-9 { grid-column: span 9; }
.g-10 { grid-column: span 10; }
.g-11 { grid-column: span 11; }
.g-12 { grid-column: span 12; }

/* ---------- 数据面板 ---------- */
.panel {
  background: var(--bg-card);
  border: var(--border-dim);
  box-shadow: var(--shadow-card);
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: var(--border-dim);
}
.panel-title {
  font-family: var(--font-heading);
  font-size: 20px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-primary);
}
.panel-body { padding: 20px; }

/* ---------- 数据表 ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.data-table caption {
  caption-side: bottom;
  padding-top: 12px;
  font-size: 12px;
  color: var(--text-secondary);
  text-align: left;
}
.data-table th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-align: left;
  color: var(--text-secondary);
  padding: 12px 14px;
  border-bottom: 1px solid rgba(240, 244, 248, 0.16);
  white-space: nowrap;
}
.data-table td {
  padding: 12px 14px;
  border-bottom: var(--border-dim);
}
.data-table tbody tr { transition: background var(--speed) var(--ease); }
.data-table tbody tr:hover { background: var(--hover-bg); }
.data-table .num { font-family: var(--font-mono); text-align: right; font-variant-numeric: tabular-nums; }
.data-table .pos { color: var(--accent-green); }
.data-table .neg { color: var(--accent-red); }
.data-table .team-cell { font-weight: 600; color: var(--text-primary); }

/* ---------- 状态标签 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-bright);
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}
.badge-green { color: var(--accent-green); border-color: var(--accent-green); background: var(--green-transparent); }
.badge-blue { color: var(--accent-blue); border-color: var(--accent-blue); background: var(--blue-transparent); }
.badge-red { color: var(--accent-red); border-color: var(--accent-red); background: rgba(255, 59, 48, 0.12); }

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(200, 255, 0, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(200, 255, 0, 0); }
  100% { box-shadow: 0 0 0 0 rgba(200, 255, 0, 0); }
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--bg-card);
  border: var(--border-dim);
  transition: border-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.card:hover { border-color: var(--border-bright); transform: translateY(-4px); }
.card-body { padding: 24px; }
.card-title {
  font-family: var(--font-heading);
  font-size: 22px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-primary);
}
.card-text { font-size: 14px; color: var(--text-secondary); }

.aside-note {
  font-size: 13px;
  color: var(--text-secondary);
  border-left: 2px solid var(--accent-blue);
  padding-left: 16px;
}
.more-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-green);
  transition: gap var(--speed) var(--ease), color var(--speed) var(--ease);
}
.more-link:hover { gap: 10px; color: var(--accent-blue); }

/* ---------- 图片容器占位 ---------- */
.media {
  position: relative;
  overflow: hidden;
  background: var(--bg-secondary);
  border: var(--border-dim);
}
.media::before { content: ""; display: block; padding-bottom: 56.25%; }
.media--portrait::before { padding-bottom: 75%; }
.media--square::before { padding-bottom: 100%; }
.media .media-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background-image:
    linear-gradient(rgba(240, 244, 248, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(240, 244, 248, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
}
.media--slant::after {
  content: "";
  position: absolute;
  top: -10%;
  right: -15%;
  width: 40%;
  height: 120%;
  background: var(--green-transparent);
  transform: skewX(-15deg);
  pointer-events: none;
}

/* ---------- 显现协议 ---------- */
html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
html[data-js] [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-dim);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-green) 0 38%, var(--accent-blue) 38% 72%, var(--accent-red) 72% 100%);
  z-index: 2;
}
.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: radial-gradient(circle, rgba(240, 244, 248, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.footer-top {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 5fr) minmax(0, 3fr);
  gap: clamp(32px, 4vw, 64px);
  padding-block: clamp(48px, 7vw, 80px) clamp(32px, 5vw, 56px);
}
.footer-brand-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}
.footer-tagline {
  font-family: var(--font-heading);
  font-size: 20px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-primary);
}
.trust-statement {
  font-size: 13px;
  line-height: 1.85;
  color: var(--text-secondary);
  max-width: 42ch;
}
.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  padding: 9px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}
.status-text { color: var(--accent-green); }
.status-divider { color: var(--text-secondary); opacity: 0.35; }
.status-metric { color: var(--text-primary); }

.footer-links-col { min-width: 0; }
.footer-links-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.footer-heading {
  display: inline-block;
  padding-bottom: 8px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-green);
  border-bottom: 1px solid rgba(200, 255, 0, 0.25);
}
.footer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-list a {
  position: relative;
  display: inline-block;
  font-size: 13px;
  color: var(--text-secondary);
  transition: color var(--speed) var(--ease);
}
.footer-list a::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--accent-green);
  transition: width var(--speed) var(--ease);
}
.footer-list a:hover { color: var(--accent-green); }
.footer-list a:hover::before { width: 100%; }

.footer-contact-col { min-width: 0; }
.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.contact-item { font-size: 13px; line-height: 1.6; }
.contact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 2px;
}
.contact-value {
  color: var(--text-primary);
  word-break: break-all;
  font-variant-numeric: tabular-nums;
}
.contact-note {
  margin-top: 18px;
  padding-top: 14px;
  border-top: var(--border-dim);
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.footer-bottom {
  position: relative;
  z-index: 1;
  border-top: var(--border-dim);
  background: var(--bg-primary);
  padding-block: 18px;
}
.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}
.footer-legal { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-legal a { color: var(--text-secondary); transition: color var(--speed) var(--ease); }
.footer-legal a:hover { color: var(--accent-green); }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 800;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  background: var(--accent-green);
  color: var(--bg-primary);
  border: 0;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: background var(--speed) var(--ease), opacity var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.back-top:hover { background: var(--accent-blue); }
.back-top[data-visible] {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-top-icon {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- 响应式 ---------- */
@media (max-width: 991px) {
  :root { --header-h: var(--header-h-mobile); }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    width: min(420px, 100%);
    background: linear-gradient(155deg, rgba(10, 14, 20, 0.98), var(--bg-secondary));
    border-left: var(--border-dim);
    box-shadow: -24px 0 60px rgba(0, 0, 0, 0.5);
    padding: calc(var(--header-h-mobile) + 32px) var(--gutter) 32px;
    transform: translateX(100%);
    transition: transform 0.42s var(--ease);
    display: flex;
    align-items: stretch;
    overflow-y: auto;
  }
  .site-nav[data-open] { transform: translateX(0); }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  .nav-item a {
    align-items: center;
    justify-content: flex-start;
    padding: 18px 4px;
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border-dim);
  }
  .nav-item a::after {
    content: "→";
    margin-left: auto;
    font-family: var(--font-body);
    font-size: 18px;
    font-weight: 400;
    color: var(--text-secondary);
    transition: color var(--speed) var(--ease), transform var(--speed) var(--ease);
  }
  .nav-item a:hover::after,
  .nav-item a[aria-current="page"]::after {
    color: var(--accent-green);
    transform: translateX(4px);
  }
  .nav-item a:hover,
  .nav-item a[aria-current="page"] { border-bottom-color: var(--accent-green); }
  .nav-item a .nav-index { font-size: 12px; }
}

@media (max-width: 767px) {
  .header-icon-btn { display: none; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-links-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-contact-col { grid-column: 1 / -1; }
  .back-top { right: 16px; bottom: 16px; width: 44px; height: 44px; }
}

@media (max-width: 479px) {
  .brand-sub { display: none; }
  .header-cta .btn-arrow { display: none; }
}

@media (max-width: 991px) and (min-width: 768px) {
  .g-4, .g-5 { grid-column: span 6; }
  .g-6, .g-7, .g-8, .g-9, .g-10, .g-11, .g-12 { grid-column: span 12; }
}

@media (max-width: 767px) {
  .g-1, .g-2, .g-3, .g-4, .g-5, .g-6, .g-7, .g-8, .g-9, .g-10, .g-11, .g-12 { grid-column: span 12; }
}

@media (max-width: 359px) {
  .header-cta { display: none; }
}

/* ---------- 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;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .status-dot { animation: none; }
}