/* =========================================================
   88优德体育 · 共享样式表 /assets/site.css
   战术白板 × 实时数据屏 —— 框架式导航 + 纵向长卷
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: var(--paper-50);
  background-image:
    linear-gradient(to right, rgba(198, 192, 178, 0.26) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(198, 192, 178, 0.26) 1px, transparent 1px);
  background-size: 64px 64px;
  color: var(--ink-900);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
svg,
video { max-width: 100%; height: auto; }

button,
input,
select,
textarea { font: inherit; color: inherit; }

ul,
ol { margin: 0; padding: 0; }

/* ---------- 2. 变量 ---------- */
:root {
  --paper-50: #FBF9F5;
  --paper-100: #F2EEE4;
  --ink-900: #16181A;
  --slate-700: #3B423D;
  --stone-300: #C6C0B2;
  --moss-600: #4E6A50;
  --clay-500: #B4704E;
  --card-red: #D2232A;
  --card-yellow: #F0BE39;
  --signal-green: #2E9E6B;

  --font-display: 'Noto Serif SC', 'Songti SC', 'Source Han Serif SC', serif;
  --font-label: 'Barlow Condensed', 'Oswald', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-num: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  --wrap: 1240px;
  --line: 2px;
  --shadow-hard: 6px 8px 0 0 #16181A;
  --shadow-hard-sm: 4px 5px 0 0 #16181A;
  --motion: 120ms ease-out;
}

/* ---------- 3. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 3px solid var(--card-red);
  outline-offset: 2px;
  border-radius: 1px;
}

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--card-yellow);
}

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

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 200;
  padding: 0.7rem 1.2rem;
  background: var(--card-yellow);
  color: var(--ink-900);
  border: var(--line) solid var(--ink-900);
  font-family: var(--font-label);
  font-size: 1rem;
  letter-spacing: 0.14em;
  text-decoration: none;
  box-shadow: var(--shadow-hard-sm);
  transition: top var(--motion);
}

.skip-link:focus {
  top: 16px;
}

/* ---------- 4. 排版 ---------- */
h1,
h2,
h3,
h4 {
  margin: 0 0 0.6em;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); }
h2 { font-size: clamp(1.35rem, 2.1vw, 1.6rem); }
h3 { font-size: 1.125rem; }
h4 { font-size: 1rem; }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--moss-600); }

.num,
[data-num] {
  font-family: var(--font-num);
  font-size: 1.08em;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  margin: 0 0 0.9rem;
  font-family: var(--font-label);
  font-size: 0.875rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--slate-700);
}

.eyebrow::before {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  background: currentColor;
}

.section-num {
  display: block;
  margin: 0 0 0.35em;
  font-family: var(--font-num);
  font-size: clamp(1.75rem, 3.4vw, 2.75rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--slate-700);
  transition: color 240ms ease-out;
}

[data-section][data-active] .section-num {
  color: var(--clay-500);
}

/* ---------- 5. 容器与网格 ---------- */
.wrap {
  width: min(100% - 32px, var(--wrap));
  margin-inline: auto;
}

.wrap-narrow {
  width: min(100% - 32px, 880px);
  margin-inline: auto;
}

.grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.7em 1.25em;
  font-family: var(--font-label);
  font-size: 1.0625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  background: var(--paper-100);
  color: var(--ink-900);
  border: var(--line) solid var(--ink-900);
  border-radius: 2px;
  box-shadow: var(--shadow-hard-sm);
  cursor: pointer;
  transition: transform var(--motion), box-shadow var(--motion),
              background-color var(--motion), color var(--motion);
}

.btn:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 3px 0 0 var(--ink-900);
}

.btn:active {
  transform: translate(4px, 5px);
  box-shadow: 0 0 0 0 var(--ink-900);
}

.btn-primary {
  background: var(--card-red);
  color: #FFFFFF;
}

.btn-accent {
  background: var(--card-yellow);
  color: var(--ink-900);
}

/* ---------- 7. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5em;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-family: var(--font-label);
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--slate-700);
}

.crumbs li {
  display: inline-flex;
  align-items: center;
}

.crumbs li::after {
  content: "/";
  margin-left: 0.5em;
  color: var(--stone-300);
}

.crumbs li:last-child::after { content: ""; margin: 0; }

.crumbs a {
  color: var(--slate-700);
  text-decoration: none;
  border-bottom: 1px solid var(--stone-300);
}

.crumbs a:hover {
  color: var(--card-red);
  border-bottom-color: var(--card-red);
}

/* ---------- 8. 正文容器 ---------- */
.prose {
  max-width: 70ch;
}

.prose p { margin: 0 0 1.1em; }

.prose a {
  color: var(--moss-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose h2,
.prose h3 { margin-top: 1.6em; }

.prose ul,
.prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.2em;
}

.prose li { margin-bottom: 0.4em; }

/* ---------- 9. 章节与色彩带 ---------- */
.band {
  position: relative;
  padding: clamp(48px, 8vw, 96px) 0;
}

.band-paper { background: var(--paper-100); }
.band-dark { background: var(--ink-900); color: var(--paper-50); }
.band-moss { background: var(--moss-600); color: var(--paper-50); }
.band-clay { background: var(--clay-500); color: var(--ink-900); }
.band-rule { border-top: var(--line) solid var(--stone-300); }

.band-dark .eyebrow,
.band-moss .eyebrow { color: var(--stone-300); }

.band-dark .section-num { color: var(--stone-300); }
.band-dark [data-section][data-active] .section-num { color: var(--card-yellow); }

.band-dark a,
.band-moss a { color: var(--card-yellow); }

/* ---------- 10. 卡片与标签 ---------- */
.panel {
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--paper-100);
  border: var(--line) solid var(--ink-900);
  box-shadow: var(--shadow-hard);
}

.panel-flat { box-shadow: none; }

.band-dark .panel,
.band-moss .panel {
  background: #1E2123;
  border-color: var(--stone-300);
  box-shadow: 6px 8px 0 0 var(--card-yellow);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.15em 0.6em;
  font-family: var(--font-label);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1.5px solid var(--ink-900);
  border-radius: 2px;
  background: var(--paper-50);
  color: var(--ink-900);
}

.tag-red { background: var(--card-red); color: #FFFFFF; }
.tag-yellow { background: var(--card-yellow); color: var(--ink-900); }
.tag-green { background: var(--signal-green); color: #FFFFFF; }
.tag-moss { background: var(--moss-600); color: #FFFFFF; }

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal-green);
  box-shadow: 0 0 0 3px rgba(46, 158, 107, 0.18);
}

/* ---------- 11. 图片容器基础规则 ---------- */
.media {
  display: block;
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--paper-100);
  border: var(--line) solid var(--ink-900);
}

.media > img,
.media > svg,
.media > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-16x9 { aspect-ratio: 16 / 9; }
.media-3x2 { aspect-ratio: 3 / 2; }
.media-4x3 { aspect-ratio: 4 / 3; }
.media-1x1 { aspect-ratio: 1 / 1; }

.media-lift { box-shadow: var(--shadow-hard); }

.media-caption {
  margin: 0.6rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--slate-700);
}

/* ---------- 12. 页头（框架式导航） ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 90;
  display: none;
  border: var(--line) solid var(--ink-900);
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  background: var(--ink-900);
  color: var(--paper-50);
  border-bottom: 3px solid var(--card-yellow);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 40px);
  width: min(100% - 32px, var(--wrap));
  min-height: 68px;
  margin: 0 auto;
  padding: 8px 0;
}

.brand {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  gap: 3px;
  padding-left: 13px;
  border-left: 4px solid var(--card-red);
  color: var(--paper-50);
  text-decoration: none;
}

.brand-mark {
  font-family: var(--font-label);
  font-size: clamp(1.15rem, 1.6vw, 1.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.08em;
}

.brand-sub {
  font-size: 0.6875rem;
  line-height: 1;
  letter-spacing: 0.2em;
  color: var(--stone-300);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 26px);
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.2vw, 18px);
  list-style: none;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 9px 2px;
  font-family: var(--font-label);
  font-size: 1.0625rem;
  letter-spacing: 0.16em;
  color: var(--paper-100);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--motion);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 3px;
  height: 3px;
  background: var(--card-yellow);
  transition: right 160ms ease-out;
}

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

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after { right: 0; }

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

.site-header .btn {
  flex: 0 0 auto;
  padding: 0.55em 1em;
  font-size: 0.95rem;
}

.nav-cta {
  background: var(--card-red);
  color: #FFFFFF;
  border-color: var(--paper-50);
  box-shadow: 4px 4px 0 0 var(--card-yellow);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background: #B51C23;
  color: #FFFFFF;
  box-shadow: 2px 2px 0 0 var(--card-yellow);
}

.nav-toggle {
  display: none;
  position: relative;
  z-index: 95;
  align-items: center;
  gap: 0.5em;
  margin-left: auto;
  padding: 0.5em 0.8em;
  font-family: var(--font-label);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  background: var(--paper-50);
  color: var(--ink-900);
  border: var(--line) solid var(--ink-900);
  cursor: pointer;
}

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 18px;
}

.nav-toggle-bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--motion), opacity var(--motion);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.read-progress {
  height: 3px;
  background: rgba(251, 249, 245, 0.14);
}

.read-progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: var(--card-red);
}

/* ---------- 13. 页脚 ---------- */
.site-footer {
  padding-top: clamp(40px, 6vw, 76px);
  background: var(--ink-900);
  color: var(--paper-100);
  border-top: 6px solid var(--moss-600);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 1.1fr) minmax(320px, 1.7fr) minmax(210px, 1fr);
  gap: clamp(28px, 4vw, 56px);
  width: min(100% - 32px, var(--wrap));
  margin: 0 auto;
  padding-bottom: clamp(32px, 5vw, 56px);
}

.footer-mark {
  margin: 0 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--card-red);
  font-family: var(--font-label);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--paper-50);
}

.footer-line {
  margin: 0;
  max-width: 32ch;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--stone-300);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 36px);
}

.footer-col-title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(240, 190, 57, 0.28);
  font-family: var(--font-label);
  font-size: 0.875rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--card-yellow);
}

.footer-list {
  display: grid;
  gap: 2px;
  list-style: none;
}

.footer-link {
  display: inline-block;
  padding: 7px 0;
  font-size: 0.9375rem;
  color: var(--paper-100);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--motion), border-color var(--motion);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--card-yellow);
  border-bottom-color: var(--card-yellow);
}

.footer-contact-label {
  margin: 0 0 10px;
  font-family: var(--font-label);
  font-size: 0.8125rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--card-yellow);
}

.footer-contact-line {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  color: var(--paper-50);
  word-break: break-word;
}

.footer-address {
  margin: 12px 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--stone-300);
}

.footer-base {
  border-top: 1px solid rgba(198, 192, 178, 0.25);
  padding: 18px 0 26px;
}

.footer-base-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  width: min(100% - 32px, var(--wrap));
  margin: 0 auto;
  font-size: 0.8125rem;
  color: var(--stone-300);
}

.footer-copy,
.footer-legal {
  margin: 0;
  font-family: var(--font-num);
  letter-spacing: 0.02em;
}

/* ---------- 14. 显现与信息带状态 ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--motion), transform var(--motion);
}

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

[data-marquee][data-paused] {
  animation-play-state: paused;
}

/* ---------- 15. 响应式 ---------- */
@media (min-width: 961px) {
  body::before { display: block; }
}

@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 80;
    width: min(340px, 86vw);
    margin: 0;
    padding: 92px 24px 32px;
    background: var(--ink-900);
    border-left: 4px solid var(--card-yellow);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    overflow-y: auto;
    transform: translateX(102%);
    transition: transform 240ms cubic-bezier(0.22, 0.61, 0.36, 1);
  }

  .site-nav[data-open] { transform: translateX(0); }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .nav-list li {
    border-bottom: 1px solid rgba(198, 192, 178, 0.28);
  }

  .nav-link {
    display: block;
    padding: 15px 0;
    font-size: 1.15rem;
  }

  .nav-link::after {
    bottom: 8px;
    height: 2px;
  }

  .site-nav .nav-cta {
    width: 100%;
    margin-top: 22px;
    font-size: 1rem;
  }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-7,
  .col-8 { grid-column: span 6; }
  .col-5,
  .col-4 { grid-column: span 6; }
  .col-3  { grid-column: span 3; }
  .col-6  { grid-column: span 6; }
}

@media (max-width: 720px) {
  .wrap,
  .wrap-narrow { width: calc(100% - 24px); }

  .header-inner,
  .footer-inner,
  .footer-base-inner { width: calc(100% - 24px); }

  .brand-sub { letter-spacing: 0.12em; }

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

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

  .grid-12 { grid-template-columns: minmax(0, 1fr); }

  .col-3,
  .col-4,
  .col-5,
  .col-6,
  .col-7,
  .col-8 { grid-column: span 1; }

  .btn { font-size: 1rem; }
}

/* ---------- 16. 降低动效偏好 ---------- */
@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;
  }

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

  .nav-link::after { transition: none; }
  .site-nav { transition: none; }
}