/* ============================================================
   悦盈体育 · V3 中文站 — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

:root {
  /* 矿物色体系 */
  --yy-night: #081311;
  --yy-teal: #0F2E2A;
  --yy-charcoal: #1A1D1C;
  --yy-rock: #6F7A75;
  --yy-moss: #4F6B57;
  --yy-clay: #A5654A;
  --yy-amber: #F2A93B;
  --yy-cyan: #35E0D1;
  --yy-cream: #F3EEE2;
  --yy-line: #2B3A35;

  --yy-moss-lt: #93B7A0;
  --yy-clay-lt: #D08A6B;
  --yy-line-soft: rgba(43, 58, 53, 0.72);
  --yy-panel: rgba(15, 46, 42, 0.55);
  --yy-text: rgba(243, 238, 226, 0.82);
  --yy-text-dim: rgba(243, 238, 226, 0.56);

  /* 字体 */
  --yy-font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --yy-font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
  --yy-font-mono: ui-monospace, "IBM Plex Mono", "JetBrains Mono", SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  /* 尺寸与节奏 */
  --yy-max: 1280px;
  --yy-pad: clamp(20px, 5vw, 64px);
  --yy-radius: 2px;
  --yy-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --yy-shadow: 0 8px 22px rgba(0, 0, 0, 0.18);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 148px;
}

body {
  margin: 0;
  background-color: var(--yy-night);
  background-image:
    radial-gradient(1100px 520px at 78% -12%, rgba(53, 224, 209, 0.1), transparent 62%),
    radial-gradient(900px 460px at 6% 2%, rgba(242, 169, 59, 0.07), transparent 60%),
    repeating-linear-gradient(90deg, rgba(43, 58, 53, 0.14) 0 1px, transparent 1px 96px);
  color: var(--yy-text);
  font-family: var(--yy-font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video, picture { max-width: 100%; }
button { font: inherit; }
ul, ol { margin: 0; }
::selection { background: var(--yy-amber); color: #081311; }

/* ---------- 中文排版基座 ---------- */
h1, h2, h3, h4 {
  margin: 0;
  color: var(--yy-cream);
  font-family: var(--yy-font-sans);
  font-weight: 800;
  font-stretch: condensed;
  letter-spacing: -0.01em;
  line-height: 1.16;
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--yy-cyan); }

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

/* ---------- 容器 ---------- */
.yy-container {
  width: 100%;
  max-width: var(--yy-max);
  margin-inline: auto;
  padding-inline: var(--yy-pad);
}

/* ---------- 跳转链接 ---------- */
.yy-skip {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--yy-amber);
  color: #081311;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--yy-radius);
  transition: top 0.2s var(--yy-ease);
}
.yy-skip:focus { top: 14px; }

/* ============================================================
   头部
   ============================================================ */
.yy-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--yy-charcoal);
  border-bottom: 1px solid var(--yy-line);
}

.yy-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  z-index: 2;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--yy-cyan), var(--yy-amber));
  transition: width 0.12s linear;
  pointer-events: none;
}

/* 上层：品牌 + 快捷行 + 动作 */
.yy-topbar {
  background: linear-gradient(100deg, #1A1D1C 0%, rgba(15, 46, 42, 0.92) 58%, #1A1D1C 100%);
  border-bottom: 1px solid var(--yy-line);
}

.yy-topbar__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 66px;
}

.yy-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: var(--yy-cream);
  text-decoration: none;
}

.yy-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border: 1px solid var(--yy-amber);
  background: rgba(242, 169, 59, 0.09);
  color: var(--yy-amber);
  font-family: var(--yy-font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

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

.yy-brand__name {
  font-size: 17px;
  font-weight: 800;
  font-stretch: condensed;
  letter-spacing: 0.08em;
}

.yy-brand__sub {
  font-family: var(--yy-font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--yy-text-dim);
}

.yy-utility {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.yy-utility__label {
  padding: 2px 7px;
  border: 1px solid var(--yy-line);
  color: var(--yy-rock);
  font-family: var(--yy-font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.yy-utility__link {
  color: var(--yy-text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.22s var(--yy-ease), border-color 0.22s var(--yy-ease);
}
.yy-utility__link:hover { color: var(--yy-cyan); border-bottom-color: var(--yy-cyan); }

.yy-utility__sep { color: var(--yy-line); }

.yy-topbar__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 按钮 */
.yy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--yy-line);
  border-radius: var(--yy-radius);
  background: transparent;
  color: var(--yy-cream);
  font-family: var(--yy-font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.24s var(--yy-ease), color 0.24s var(--yy-ease),
    border-color 0.24s var(--yy-ease), transform 0.24s var(--yy-ease);
}
.yy-btn--sm { padding: 7px 13px; font-size: 12.5px; }
.yy-btn--amber {
  background: var(--yy-amber);
  border-color: var(--yy-amber);
  color: #0A1512;
  font-weight: 700;
}
.yy-btn--amber:hover { background: #FFBE57; border-color: #FFBE57; }
.yy-btn--ghost {
  border-color: rgba(53, 224, 209, 0.42);
  color: var(--yy-cyan);
}
.yy-btn--ghost:hover { background: rgba(53, 224, 209, 0.1); border-color: var(--yy-cyan); }
.yy-legacy { white-space: nowrap; }

/* 移动开关 */
.yy-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  background: rgba(15, 46, 42, 0.85);
  border: 1px solid var(--yy-line);
  border-radius: var(--yy-radius);
  color: var(--yy-cream);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: border-color 0.24s var(--yy-ease), background 0.24s var(--yy-ease);
}
.yy-nav-toggle:hover { border-color: rgba(242, 169, 59, 0.6); }

.yy-nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 16px;
}
.yy-nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: var(--yy-amber);
  transition: transform 0.24s var(--yy-ease), opacity 0.24s var(--yy-ease);
}
.yy-nav-toggle[aria-expanded="true"] .yy-nav-toggle__bars span:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.yy-nav-toggle[aria-expanded="true"] .yy-nav-toggle__bars span:nth-child(2) { opacity: 0; }
.yy-nav-toggle[aria-expanded="true"] .yy-nav-toggle__bars span:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

/* 下层栏目带 */
.yy-nav {
  display: block;
  background: linear-gradient(180deg, rgba(15, 46, 42, 0.94), rgba(8, 19, 17, 0.94));
  border-top: 1px solid var(--yy-line);
}

.yy-nav__inner {
  display: flex;
  align-items: center;
  gap: 16px;
}

.yy-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.8vw, 28px);
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.yy-nav__list::-webkit-scrollbar { display: none; }

.yy-nav__link {
  display: block;
  padding: 15px 2px 13px;
  color: rgba(243, 238, 226, 0.68);
  font-size: 14.5px;
  letter-spacing: 0.03em;
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.25s var(--yy-ease), border-color 0.25s var(--yy-ease);
}
.yy-nav__link:hover { color: var(--yy-cream); }
.yy-nav__link[aria-current="page"] {
  color: var(--yy-cream);
  border-bottom-color: var(--yy-amber);
}

.yy-nav__legacy {
  margin-left: auto;
  padding: 5px 11px;
  border: 1px solid rgba(242, 169, 59, 0.45);
  border-radius: var(--yy-radius);
  color: var(--yy-amber);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.24s var(--yy-ease), border-color 0.24s var(--yy-ease);
}
.yy-nav__legacy:hover { background: rgba(242, 169, 59, 0.12); border-color: var(--yy-amber); }

/* 三入口快捷条（移动） */
.yy-quickbar {
  display: none;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  background: var(--yy-night);
  border-top: 1px solid var(--yy-line);
}
.yy-quickbar__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px;
  border-right: 1px solid var(--yy-line);
  color: var(--yy-cream);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background 0.24s var(--yy-ease);
}
.yy-quickbar__item:last-child { border-right: 0; }
.yy-quickbar__item:hover { background: rgba(15, 46, 42, 0.85); }
.yy-quickbar__k {
  font-family: var(--yy-font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--yy-cyan);
}

/* ============================================================
   页脚
   ============================================================ */
.yy-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 104px);
  background: var(--yy-charcoal);
  border-top: 1px solid var(--yy-line);
  color: var(--yy-text);
}

.yy-footer__edge {
  height: 2px;
  background: linear-gradient(90deg, var(--yy-amber), var(--yy-moss) 42%, var(--yy-cyan));
}

.yy-footer__inner {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 4vw, 56px);
  padding-block: clamp(40px, 6vw, 72px);
}

.yy-footer__brandcol {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 350px;
}

.yy-brand--footer .yy-brand__mark { width: 32px; height: 32px; font-size: 11.5px; }
.yy-brand--footer .yy-brand__name { font-size: 15.5px; }
.yy-brand--footer .yy-brand__sub { font-size: 10px; }

.yy-footer__tagline {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--yy-text-dim);
}

.yy-footer__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.yy-tag {
  padding: 4px 9px;
  border: 1px solid var(--yy-line);
  border-radius: var(--yy-radius);
  color: var(--yy-text);
  font-family: var(--yy-font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.yy-tag--moss { border-color: rgba(147, 183, 160, 0.5); color: var(--yy-moss-lt); }
.yy-tag--clay { border-color: rgba(208, 138, 107, 0.5); color: var(--yy-clay-lt); }
.yy-tag--cyan { border-color: rgba(53, 224, 209, 0.45); color: var(--yy-cyan); }

.yy-footer__col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.yy-footer__coltitle {
  margin: 0;
  padding-left: 10px;
  border-left: 2px solid var(--yy-line);
  color: rgba(243, 238, 226, 0.92);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  font-stretch: normal;
}

.yy-footer__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.yy-footer__link {
  display: inline-block;
  color: var(--yy-text-dim);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.22s var(--yy-ease), border-color 0.22s var(--yy-ease);
}
.yy-footer__link:hover { color: var(--yy-cyan); border-bottom-color: rgba(53, 224, 209, 0.5); }

.yy-footer__contact {
  display: grid;
  gap: 6px;
  padding-block: 22px;
  border-top: 1px solid var(--yy-line);
}
.yy-footer__contact-line { margin: 0; font-size: 13.5px; color: var(--yy-text); }
.yy-footer__address { margin: 0; font-size: 13px; color: var(--yy-text-dim); }
.yy-footer__note { margin: 0; font-size: 12.5px; color: var(--yy-rock); }

.yy-footer__legal {
  background: rgba(8, 19, 17, 0.75);
  border-top: 1px solid var(--yy-line);
}
.yy-footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 24px;
  padding-block: 16px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--yy-rock);
}
.yy-footer__copy { margin: 0; }
.yy-footer__icp { margin: 0; letter-spacing: 0.08em; }

/* ============================================================
   基础组件（页面阶段复用）
   ============================================================ */
.yy-section { padding-block: clamp(48px, 8vw, 96px); }

.yy-label {
  display: inline-block;
  margin: 0 0 12px;
  color: var(--yy-rock);
  font-family: var(--yy-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.yy-mono {
  font-family: var(--yy-font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.yy-h1 {
  margin: 0 0 0.34em;
  font-size: clamp(34px, 5.4vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.015em;
}
.yy-h2 { margin: 0 0 0.42em; font-size: clamp(26px, 3.4vw, 42px); line-height: 1.14; }
.yy-h3 { margin: 0 0 0.5em; font-size: clamp(19px, 2vw, 26px); line-height: 1.32; font-weight: 700; }

.yy-lead {
  max-width: 62ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--yy-text-dim);
}

.yy-panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--yy-panel);
  border: 1px solid var(--yy-line);
  border-radius: var(--yy-radius);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.18);
}
.yy-panel--flat { background: rgba(15, 46, 42, 0.35); box-shadow: none; }
.yy-panel--moss {
  border-color: rgba(79, 107, 87, 0.9);
  background: linear-gradient(160deg, rgba(79, 107, 87, 0.22), rgba(15, 46, 42, 0.52));
}
.yy-panel--clay {
  border-color: rgba(165, 101, 74, 0.8);
  background: linear-gradient(160deg, rgba(165, 101, 74, 0.18), rgba(15, 46, 42, 0.52));
}

.yy-divider {
  height: 1px;
  margin-block: clamp(24px, 4vw, 48px);
  border: 0;
  background: var(--yy-line);
}

.yy-grid { display: grid; gap: clamp(16px, 2.2vw, 28px); }
.yy-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.yy-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.yy-grid--asym { grid-template-columns: 7fr 3fr 2fr; }

.yy-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-family: var(--yy-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--yy-rock);
}
.yy-breadcrumb a {
  color: var(--yy-text-dim);
  text-decoration: none;
  transition: color 0.22s var(--yy-ease);
}
.yy-breadcrumb a:hover { color: var(--yy-cyan); }
.yy-breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--yy-line);
}

.yy-prose {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--yy-text);
}
.yy-prose h2, .yy-prose h3 { margin-top: 1.9em; margin-bottom: 0.6em; }
.yy-prose p { margin: 0 0 1.1em; }
.yy-prose ul, .yy-prose ol { margin: 0 0 1.2em; padding-left: 1.25em; }
.yy-prose li { margin-bottom: 0.4em; }
.yy-prose a { color: var(--yy-cyan); text-underline-offset: 3px; }
.yy-prose strong { color: var(--yy-cream); }
.yy-prose blockquote {
  margin: 1.6em 0;
  padding: 12px 18px;
  border-left: 2px solid var(--yy-amber);
  background: rgba(15, 46, 42, 0.55);
  color: var(--yy-cream);
}
.yy-prose hr { border: 0; border-top: 1px solid var(--yy-line); margin: 2em 0; }
.yy-prose code {
  font-family: var(--yy-font-mono);
  font-size: 0.92em;
  color: var(--yy-amber);
}

/* 图片容器基础规则 */
.yy-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--yy-line);
  border-radius: var(--yy-radius);
  background-color: var(--yy-teal);
  background-image:
    linear-gradient(135deg, rgba(15, 46, 42, 0.92), rgba(8, 19, 17, 0.96)),
    repeating-linear-gradient(45deg, rgba(43, 58, 53, 0.4) 0 1px, transparent 1px 14px);
}
.yy-media img,
.yy-media picture,
.yy-media video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.yy-media--square { aspect-ratio: 1 / 1; }
.yy-media--tall { aspect-ratio: 3 / 4; }
.yy-media--banner { aspect-ratio: 21 / 9; }
.yy-media__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 9px 12px;
  font-family: var(--yy-font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--yy-text-dim);
  background: linear-gradient(0deg, rgba(8, 19, 17, 0.92), transparent);
}

/* ---------- 显现动效 ---------- */
[data-reveal] {
  transition: opacity 0.42s var(--yy-ease), transform 0.42s var(--yy-ease);
}
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .yy-utility { display: none; }
}

@media (max-width: 1024px) {
  .yy-grid--asym { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .yy-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .yy-footer__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 28px;
  }
  .yy-footer__brandcol { max-width: none; grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 128px; }

  .yy-topbar__inner { min-height: 56px; gap: 10px; }
  .yy-brand__mark { width: 34px; height: 34px; font-size: 12px; }
  .yy-brand__name { font-size: 15.5px; }
  .yy-brand__sub { font-size: 9.5px; letter-spacing: 0.12em; }

  .yy-nav-toggle { display: inline-flex; }
  .yy-quickbar { display: grid; }

  .yy-nav { display: none; }
  .yy-nav[data-open="true"] { display: block; }
  .yy-nav__inner { display: block; padding-top: 6px; padding-bottom: 12px; }
  .yy-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: visible;
  }
  .yy-nav__link {
    padding: 13px 4px 13px 14px;
    border-bottom: 1px solid var(--yy-line);
    border-left: 2px solid transparent;
  }
  .yy-nav__link[aria-current="page"] {
    border-bottom-color: var(--yy-line);
    border-left-color: var(--yy-amber);
    background: rgba(242, 169, 59, 0.06);
  }
  .yy-nav__legacy { display: none; }
}

@media (max-width: 680px) {
  body { font-size: 15px; }
  .yy-grid--2,
  .yy-grid--3,
  .yy-grid--asym { grid-template-columns: minmax(0, 1fr); }
  .yy-footer__inner { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .yy-footer__legal-inner { font-size: 12px; }
  .yy-btn--sm { padding: 7px 10px; font-size: 12px; }
  .yy-nav-toggle__text { display: none; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js-reveal [data-reveal],
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition-delay: 0ms !important;
  }
  .yy-progress { transition: none; }
}