/* ==========================================================================
   大发体育方 · 共享样式表 /assets/site.css
   骨料：墨岩黑 · 石墨灰 · 网格线灰 · 高原纸白 · 赤陶红 · 湖泊青 · 赛事荧光绿
   ========================================================================== */

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

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

body,
h1, h2, h3, h4, h5,
p, figure, blockquote, dl, dd,
ul, ol {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
}

button { cursor: pointer; }

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

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. Tokens ---------- */
:root {
  /* 色彩 */
  --ink: #0F1416;
  --graphite: #1D2427;
  --grid: #30393D;
  --paper: #F4F1EC;
  --terra: #C4532B;
  --terra-deep: #8F3517;
  --lake: #0E7C86;
  --lime: #B9F227;
  --violet: #6C5CE7;
  --stone: #5A656B;
  --stone-soft: #8B969C;

  --line: rgba(15, 20, 22, 0.14);
  --line-dark: rgba(244, 241, 236, 0.16);

  /* 字体 */
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei",
    system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "DejaVu Sans Mono", "Liberation Mono", monospace;

  /* 间距刻度 */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;

  /* 版面 */
  --wrap: 1240px;
  --gutter: 20px;
  --edge: max(var(--gutter), calc((100vw - var(--wrap)) / 2));
  --header-h: 72px;

  /* 动效 */
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur-fast: 180ms;
  --dur-mid: 240ms;
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  color: var(--ink);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  text-wrap: balance;
}

h1 { font-size: clamp(34px, 5.2vw, 56px); line-height: 1.02; }
h2 { font-size: clamp(24px, 3vw, 34px); line-height: 1.08; }
h3 { font-size: clamp(18px, 2vw, 24px); line-height: 1.2; }
h4 { font-size: 17px; line-height: 1.35; letter-spacing: -0.01em; }

p + p { margin-top: 1.2em; }

strong { font-weight: 700; }

::selection {
  background: var(--lime);
  color: var(--ink);
}

/* ---------- 4. 工具类 ---------- */
.wrap {
  width: min(100% - (var(--gutter) * 2), var(--wrap));
  margin-inline: auto;
}

.wrap--narrow {
  width: min(100% - (var(--gutter) * 2), 820px);
}

.section {
  padding-block: var(--s-8);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.02em;
}

.ann {
  display: block;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.ann--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.32em;
  line-height: 1;
}

.rule {
  height: 1px;
  border: 0;
  background: var(--grid);
}

.grid {
  display: grid;
  gap: var(--s-5);
}

.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)); }

/* ---------- 5. 按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.03em;
  border: 1px solid transparent;
  border-radius: 0;
  text-decoration: none;
  transition: background-color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease);
}

.btn-cta {
  background-color: var(--terra);
  border-color: var(--terra);
  color: #FFFFFF;
}

.btn-cta:hover {
  background-color: var(--terra-deep);
  border-color: var(--terra-deep);
  color: #FFFFFF;
}

.btn--ghost {
  background-color: transparent;
  border-color: currentColor;
  color: inherit;
}

.btn--ghost:hover {
  background-color: var(--terra);
  border-color: var(--terra);
  color: #FFFFFF;
}

.btn--lime {
  background-color: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.btn--lime:hover {
  background-color: #cdf75c;
  border-color: #cdf75c;
  color: var(--ink);
}

.header-cta {
  padding: 9px 16px;
  font-size: 14px;
  white-space: nowrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  border: 1px solid currentColor;
  color: var(--terra);
}

.tag--lake { color: var(--lake); }
.tag--lime { color: var(--lime); }

/* ---------- 6. 卡片与数据锚点 ---------- */
.card {
  position: relative;
  padding: var(--s-5);
  background-color: var(--paper);
  border: 1px solid var(--line);
}

.card--dark {
  background-color: var(--graphite);
  border-color: var(--grid);
  color: var(--paper);
}

.card--dark .stat-label,
.card--dark .ann { color: var(--stone-soft); }

.card--accent { border-left: 4px solid var(--terra); }

.stat { display: grid; gap: 6px; }

.stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(28px, 4.6vw, 48px);
  line-height: 1;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb {
  padding-block: var(--s-4);
  font-size: 13px;
  color: var(--stone);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--grid);
  letter-spacing: 0;
}

.breadcrumb a {
  color: var(--lake);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.breadcrumb [aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 8. 图片容器（页面阶段使用） ---------- */
.img-frame {
  position: relative;
  display: block;
  width: 100%;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background-color: var(--graphite);
  background-image:
    linear-gradient(to right, rgba(244, 241, 236, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(244, 241, 236, 0.07) 1px, transparent 1px);
  background-size: 36px 36px;
  border: 1px solid var(--grid);
}

.img-frame > img,
.img-frame > svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame > figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 24px 16px 12px;
  background-image: linear-gradient(to top, rgba(15, 20, 22, 0.92), rgba(15, 20, 22, 0));
  color: var(--paper);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--portrait { aspect-ratio: 3 / 4; }
.img-frame--tall { aspect-ratio: 2 / 3; }

/* ---------- 9. 跳至主内容 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: var(--edge);
  z-index: 200;
  padding: 12px 20px;
  background-color: var(--lime);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transform: translateY(-140%);
  transition: transform var(--dur-fast) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
}

/* ---------- 10. 页头 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  background-color: transparent;
  color: var(--ink);
  border-bottom: 1px solid transparent;
  transition: background-color 220ms var(--ease), color 220ms var(--ease),
    border-color 220ms var(--ease);
}

.site-header.is-solid {
  background-color: var(--ink);
  color: var(--paper);
  border-bottom-color: var(--grid);
}

.site-header.is-solid .brand-sub { color: var(--stone-soft); }
.site-header.is-solid .batch-badge {
  color: var(--lime);
  border-color: rgba(185, 242, 39, 0.45);
}
.site-header.is-solid .nav-list a:hover { color: var(--lime); }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background-color: var(--lime);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 26px);
  min-height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1 1 auto;
  min-width: 0;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand-mark {
  position: relative;
  display: block;
  width: 12px;
  height: 26px;
  background-color: var(--terra);
  flex: none;
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: -4px;
  width: 3px;
  background-color: var(--lake);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-name {
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.brand-sub {
  margin-top: 2px;
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--stone);
}

.batch-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--terra);
  border: 1px solid currentColor;
  white-space: nowrap;
}

.batch-dot {
  display: block;
  width: 6px;
  height: 6px;
  flex: none;
  background-color: currentColor;
  animation: batchPulse 2.4s ease-in-out infinite;
}

@keyframes batchPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* 导航 */
.site-nav { flex: 0 1 auto; margin-left: auto; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-list a {
  position: relative;
  display: block;
  padding: 8px 13px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.01em;
  color: inherit;
  border-bottom: 2px solid transparent;
  transition: color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease);
}

.nav-list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 16px;
  background-color: var(--terra);
  transform: translateY(-50%);
  transition: width var(--dur-fast) var(--ease);
}

.nav-list a:hover { color: var(--terra); }
.nav-list a:hover::before { width: 4px; }

.nav-list a[aria-current="page"] {
  font-weight: 700;
  border-bottom-color: var(--lime);
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 9px 13px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: inherit;
  border: 1px solid currentColor;
  transition: background-color var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease);
}

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 18px;
  height: 12px;
}

.nav-toggle-bars span {
  display: block;
  height: 1.5px;
  background-color: currentColor;
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}

.site-header[data-open] .nav-toggle-bars span:nth-child(1) {
  transform: translateY(5.25px) rotate(45deg);
}
.site-header[data-open] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle-bars span:nth-child(3) {
  transform: translateY(-5.25px) rotate(-45deg);
}

/* ---------- 11. 页头移动端 ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .site-header[data-open] {
    background-color: var(--ink);
    color: var(--paper);
    border-bottom-color: var(--grid);
  }

  .site-header[data-open] .brand-sub { color: var(--stone-soft); }

  .site-nav {
    position: absolute;
    top: 100%;
    left: calc(var(--edge) * -1);
    right: calc(var(--edge) * -1);
    margin-left: 0;
    max-height: min(70vh, 520px);
    overflow-y: auto;
    background-color: var(--ink);
    color: var(--paper);
    border-top: 1px solid var(--grid);
    border-bottom: 1px solid var(--grid);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 200ms var(--ease), transform 200ms var(--ease),
      visibility 0s linear 200ms;
  }

  .site-header[data-open] .site-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity 200ms var(--ease), transform 200ms var(--ease),
      visibility 0s linear 0s;
  }

  .nav-list {
    display: block;
    padding-block: 6px;
    counter-reset: navidx;
  }

  .nav-list li { border-bottom: 1px solid var(--grid); }
  .nav-list li:last-child { border-bottom: 0; }

  .nav-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 15px var(--edge);
    font-size: 16px;
    font-weight: 600;
    border-bottom: 0;
    counter-increment: navidx;
  }

  .nav-list a::before { display: none; }

  .nav-list a::after {
    content: counter(navidx, decimal-leading-zero);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--stone-soft);
  }

  .nav-list a:hover { color: var(--paper); }

  .nav-list a[aria-current="page"] {
    color: var(--lime);
    border-bottom-color: transparent;
    box-shadow: inset 3px 0 0 var(--lime);
    background-color: rgba(185, 242, 39, 0.07);
  }
}

@media (max-width: 720px) {
  .header-cta { display: none; }
}

@media (max-width: 520px) {
  :root { --header-h: 62px; }
  .brand-sub { display: none; }
  .brand { gap: 10px; }
  .batch-badge { padding: 3px 7px; font-size: 10px; }
  .nav-toggle { padding: 8px 10px; }
  .nav-toggle-text { display: none; }
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  background-color: var(--ink);
  color: var(--paper);
  border-top: 1px solid var(--grid);
  padding-top: var(--s-8);
  font-size: 14px;
  line-height: 1.7;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.6fr) repeat(3, minmax(140px, 1fr));
  gap: var(--s-7) var(--s-5);
  padding-bottom: var(--s-7);
  border-bottom: 1px solid var(--grid);
}

.footer-brand-name {
  font-size: 19px;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: 0.05em;
}

.footer-brand-tag {
  margin-top: 12px;
  max-width: 26em;
  font-size: 13px;
  line-height: 1.75;
  color: var(--stone-soft);
}

.footer-batch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lime);
  border: 1px solid var(--grid);
}

.footer-col-title {
  margin-bottom: 16px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.22em;
  color: var(--stone-soft);
}

.footer-col ul {
  display: grid;
  gap: 10px;
}

.footer-col a {
  position: relative;
  display: inline-block;
  padding-left: 0;
  font-size: 14px;
  color: var(--paper);
  transition: padding-left var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease);
}

.footer-col a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background-color: var(--terra);
  transform: translateY(-50%);
  transition: width var(--dur-fast) var(--ease);
}

.footer-col a:hover {
  padding-left: 14px;
  color: var(--lime);
}

.footer-col a:hover::before { width: 9px; }

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: var(--s-5);
  padding-block: var(--s-6);
  border-bottom: 1px solid var(--grid);
}

.contact-item {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.contact-label {
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--stone-soft);
}

.contact-value {
  font-size: 14px;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-3) var(--s-5);
  padding-block: var(--s-5) var(--s-6);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--stone-soft);
}

.footer-note {
  max-width: 56em;
  line-height: 1.7;
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--s-6) var(--s-5);
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 520px) {
  .site-footer { padding-top: var(--s-7); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-base { flex-direction: column; align-items: flex-start; }
}

/* ---------- 13. 栅格降级 ---------- */
@media (max-width: 900px) {
  .grid--3,
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .section { padding-block: var(--s-6); }
}

/* ---------- 14. 显现动画协议 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 480ms var(--ease), transform 520ms var(--ease);
}

.has-js [data-reveal="in"] {
  opacity: 1;
  transform: none;
}

/* ---------- 15. 焦点可见 ---------- */
:focus-visible {
  outline: 2px solid var(--terra);
  outline-offset: 3px;
}

.site-header.is-solid :focus-visible,
.site-footer :focus-visible,
.card--dark :focus-visible {
  outline-color: var(--lime);
}

/* ---------- 16. 降低动效偏好 ---------- */
@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;
    transition-delay: 0s !important;
  }

  .has-js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .scroll-progress { display: none; }
}