/* =========================================================
   duobao-sports-info.com.cn — /assets/site.css
   看台深蓝 + 纸张叠层 + 展签式信息板
   ========================================================= */

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

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

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

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

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

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

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

button { background: none; border: 0; }

[hidden] { display: none !important; }

/* ---------- 2. tokens ---------- */
:root {
  --ink-900: #08182B;
  --ink-800: #0E2033;
  --ink-700: #122C46;
  --ink-600: #1B4568;
  --lime: #C8FF3D;
  --mint: #37E6B2;
  --orange: #FF8A3D;
  --violet: #7C5CFF;
  --paper: #F5F8FB;
  --stone: #93A7BC;
  --ink-fade: #45607A;
  --ink-faint: #5A7089;

  --shell: 1320px;
  --gutter: 24px;
  --radius: 4px;
  --ease: cubic-bezier(.2, .8, .2, 1);

  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 3. base ---------- */
body {
  background-color: var(--ink-900);
  background-image:
    linear-gradient(rgba(147, 167, 188, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(147, 167, 188, .055) 1px, transparent 1px);
  background-size: 48px 48px;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--lime); color: var(--ink-900); }

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

/* ---------- 4. typography ---------- */
.db-display {
  font-size: clamp(2.6rem, 6.2vw, 5.4rem);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -.02em;
}

.db-h2 {
  font-size: clamp(1.5rem, 2.7vw, 2.25rem);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -.01em;
}

.db-h3 {
  font-size: 1.125rem;
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: 0;
}

.db-lead {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: #C6D3E0;
  max-width: 68ch;
}

.db-note {
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--stone);
}

.db-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

/* ---------- 5. layout ---------- */
.db-shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.db-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

.db-span-3 { grid-column: span 3; }
.db-span-4 { grid-column: span 4; }
.db-span-5 { grid-column: span 5; }
.db-span-6 { grid-column: span 6; }
.db-span-7 { grid-column: span 7; }
.db-span-8 { grid-column: span 8; }
.db-span-12 { grid-column: span 12; }

@media (max-width: 1080px) {
  .db-span-3,
  .db-span-4,
  .db-span-5 { grid-column: span 6; }
  .db-span-7,
  .db-span-8 { grid-column: span 12; }
}

@media (max-width: 720px) {
  .db-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .db-span-3,
  .db-span-4,
  .db-span-5,
  .db-span-6,
  .db-span-7,
  .db-span-8 { grid-column: span 4; }
}

/* ---------- 6. buttons / tags / labels ---------- */
.db-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .7rem 1.2rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease), transform .18s var(--ease);
}

.db-btn:hover { transform: translateY(-1px); }
.db-btn:active { transform: translateY(0); }

.db-btn--lime {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-900);
}
.db-btn--lime:hover { background: #D8FF6E; border-color: #D8FF6E; }

.db-btn--ghost {
  background: transparent;
  border-color: var(--lime);
  color: var(--lime);
}
.db-btn--ghost:hover { background: rgba(200, 255, 61, .13); }

.db-btn--orange {
  background: transparent;
  border-color: var(--orange);
  color: var(--orange);
}
.db-btn--orange:hover { background: rgba(255, 138, 61, .13); }

.db-label {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .08em;
  line-height: 1.4;
  color: var(--stone);
}

.db-tag {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .12rem .5rem;
  border-radius: 3px;
  background: var(--ink-600);
  color: var(--paper);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .08em;
  line-height: 1.6;
  white-space: nowrap;
}

.db-tag--focus {
  background: var(--lime);
  color: var(--ink-900);
}

.db-tag--note {
  background: transparent;
  border: 1px solid rgba(147, 167, 188, .45);
  color: var(--stone);
}

/* ---------- 7. cards / focus block ---------- */
.db-card {
  position: relative;
  background: var(--ink-700);
  border: 1px solid var(--ink-800);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: inset 0 1px 0 rgba(147, 167, 188, .08);
}

.db-card--paper {
  background: var(--paper);
  border-color: rgba(8, 24, 43, .14);
  color: var(--ink-900);
}

.db-focus {
  position: relative;
  background: rgba(200, 255, 61, .07);
  border: 1px solid rgba(200, 255, 61, .4);
  border-left: 4px solid var(--lime);
  border-radius: var(--radius);
  padding: 1.5rem;
}

/* ---------- 8. meter ---------- */
.db-meter {
  display: block;
  width: 100%;
  height: 8px;
  border-radius: 2px;
  background: rgba(147, 167, 188, .18);
  overflow: hidden;
}

.db-meter__fill {
  display: block;
  height: 100%;
  width: var(--val, 0%);
  background: var(--lime);
  transition: width 600ms var(--ease);
}

.db-meter__fill--mint { background: var(--mint); }
.db-meter__fill--violet { background: var(--violet); }
.db-meter__fill--orange { background: var(--orange); }

/* ---------- 9. media (页面阶段放图) ---------- */
.db-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--ink-800);
  border-radius: var(--radius);
  background: var(--ink-700);
}

.db-media img,
.db-media picture,
.db-media svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.db-media--slant { clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), 0 100%); }
.db-media--tall { aspect-ratio: 4 / 5; }
.db-media--wide { aspect-ratio: 21 / 9; }

.db-media-note {
  display: block;
  margin-top: .55rem;
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 10. crumbs ---------- */
.db-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-size: .8125rem;
  color: var(--stone);
}

.db-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}

.db-crumbs__sep { color: rgba(147, 167, 188, .5); }

.db-crumbs a { color: var(--stone); transition: color .18s var(--ease); }
.db-crumbs a:hover { color: var(--lime); }
.db-crumbs [aria-current="page"] { color: var(--paper); font-weight: 600; }

/* ---------- 11. skip link ---------- */
.db-skip {
  position: absolute;
  top: -80px;
  left: 16px;
  z-index: 300;
  padding: .6rem 1rem;
  background: var(--lime);
  color: var(--ink-900);
  border-radius: var(--radius);
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: .04em;
  transition: top .18s var(--ease);
}

.db-skip:focus { top: 12px; }

/* ---------- 12. header ---------- */
.db-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-color: transparent;
  background-image: linear-gradient(180deg, rgba(8, 24, 43, .88) 0%, rgba(8, 24, 43, .38) 62%, rgba(8, 24, 43, 0) 100%);
  transition: background-color .22s var(--ease), box-shadow .22s var(--ease);
}

.db-header[data-scrolled="true"] {
  background-image: none;
  background-color: var(--ink-700);
  box-shadow: 0 1px 0 var(--lime), 0 12px 30px rgba(0, 0, 0, .36);
}

.db-header__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 76px;
}

.db-scrollbar {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  z-index: 4;
  will-change: transform;
}

/* 品牌签 */
.db-brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  min-height: 44px;
  flex: 0 0 auto;
}

.db-brand__mark {
  position: relative;
  width: 22px;
  height: 22px;
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  flex: 0 0 auto;
}

.db-brand__mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  background: var(--ink-900);
  clip-path: polygon(0 0, 100% 0, 0 100%);
}

.db-brand__text {
  font-size: 1.0625rem;
  font-weight: 900;
  letter-spacing: .02em;
  color: var(--paper);
  white-space: nowrap;
}

.db-brand__sub {
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .22em;
  color: var(--stone);
  padding-top: .25rem;
}

.db-brand--dark .db-brand__text { color: var(--ink-900); }
.db-brand--dark .db-brand__mark::after { background: var(--paper); }
.db-brand--dark .db-brand__sub { color: var(--ink-faint); }

/* 导航 */
.db-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-left: auto;
}

.db-nav__list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.db-nav__item { position: relative; }

.db-nav__link {
  position: relative;
  display: inline-block;
  padding: .45rem 0;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .08em;
  color: rgba(245, 248, 251, .78);
  transition: color .18s var(--ease);
}

.db-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .2s var(--ease);
}

.db-nav__link:hover { color: var(--paper); }
.db-nav__link:hover::after,
.db-nav__link:focus-visible::after { transform: scaleX(1); }

.db-nav__link[aria-current="page"] { color: var(--lime); }
.db-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--lime);
  box-shadow: 0 -2px 0 var(--violet);
}

.db-nav__note {
  display: none;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--stone);
}

.db-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .45rem .95rem;
  border: 1px solid var(--lime);
  border-radius: 3px;
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--lime);
  white-space: nowrap;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.db-cta:hover { background: var(--lime); color: var(--ink-900); }

/* 汉堡按钮 */
.db-nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: .5rem;
  padding: .5rem .7rem;
  background: transparent;
  border: 1px solid rgba(200, 255, 61, .55);
  border-radius: 3px;
  color: var(--lime);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  cursor: pointer;
  transition: background-color .18s var(--ease);
}

.db-nav-toggle:hover { background: rgba(200, 255, 61, .12); }

.db-nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 16px;
  height: 12px;
}

.db-nav-toggle__bars i {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.db-nav-toggle[data-active="true"] .db-nav-toggle__bars i:first-child {
  transform: translateY(2.5px) rotate(45deg);
}

.db-nav-toggle[data-active="true"] .db-nav-toggle__bars i:last-child {
  transform: translateY(-2.5px) rotate(-45deg);
}

.db-nav-toggle__label { line-height: 1; }

/* 抽屉遮罩 */
.db-scrim {
  position: fixed;
  inset: 0;
  z-index: 2;
  background: rgba(8, 24, 43, .8);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s var(--ease);
}

.db-scrim[data-open="true"] {
  opacity: 1;
  pointer-events: auto;
}

@media (min-width: 921px) {
  .db-scrim { display: none !important; }
}

/* ---------- 13. 移动端抽屉 ---------- */
@media (max-width: 920px) {
  .db-header__inner { min-height: 64px; gap: 12px; }
  .db-brand__sub { display: none; }

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

  .db-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 3;
    width: min(86vw, 360px);
    margin-left: 0;
    padding: 88px 26px 36px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1.4rem;
    background: var(--ink-700);
    border-left: 1px solid rgba(200, 255, 61, .35);
    clip-path: polygon(18% 0, 100% 0, 100% 100%, 0 100%);
    box-shadow: -28px 0 70px rgba(0, 0, 0, .55);
    transform: translateX(104%);
    transition: transform 240ms var(--ease);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .db-nav[data-open="true"] { transform: translateX(0); }

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

  .db-nav__item { width: 100%; border-bottom: 1px solid rgba(147, 167, 188, .16); }

  .db-nav__link {
    display: block;
    width: 100%;
    padding: .9rem 0;
    font-size: 1rem;
    letter-spacing: .04em;
  }

  .db-nav__link::after { display: none; }
  .db-nav__link[aria-current="page"] { color: var(--lime); box-shadow: none; }

  .db-cta { width: 100%; padding: .8rem 1rem; }
  .db-nav__note { display: block; }

  .db-nav__note::before {
    content: "";
    display: block;
    width: 42px;
    height: 2px;
    background: var(--violet);
    margin-bottom: .75rem;
  }
}

/* ---------- 14. footer（浅色纸张层） ---------- */
.db-footer {
  position: relative;
  margin-top: 5rem;
  padding-top: calc(36px + 4.25rem);
  background: var(--paper);
  color: var(--ink-900);
  clip-path: polygon(0 36px, 100% 0, 100% 100%, 0 100%);
}

.db-footer :focus-visible { outline-color: var(--ink-600); }

.db-footer__top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 1rem 2.5rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid rgba(8, 24, 43, .14);
}

.db-footer__tagline {
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-fade);
  max-width: 52ch;
}

.db-footer__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  padding: 2.25rem 0 3rem;
}

.db-footer__title {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1.6;
  color: var(--ink-600);
  margin-bottom: .9rem;
}

.db-footer__list {
  display: flex;
  flex-direction: column;
  gap: .55rem;
}

.db-footer__list--plain { gap: .85rem; }

.db-footer__link {
  display: inline-block;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--ink-900);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.db-footer__link:hover {
  color: var(--ink-600);
  border-bottom-color: var(--orange);
}

.db-footer__key {
  display: block;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .08em;
  line-height: 1.6;
  color: var(--ink-faint);
}

.db-footer__val {
  display: block;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--ink-900);
  overflow-wrap: anywhere;
}

.db-footer__hint {
  margin-top: .95rem;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--ink-faint);
  max-width: 42ch;
}

.db-footer__base {
  border-top: 1px solid rgba(8, 24, 43, .14);
  background: rgba(8, 24, 43, .035);
}

.db-footer__baseInner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: .4rem 1.4rem;
  padding-block: 1.15rem;
  font-size: .8125rem;
  color: var(--ink-faint);
  text-align: center;
}

.db-footer__icp {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

@media (max-width: 880px) {
  .db-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .db-footer { margin-top: 3.5rem; padding-top: calc(28px + 3rem); clip-path: polygon(0 28px, 100% 0, 100% 100%, 0 100%); }
  .db-footer__grid { grid-template-columns: minmax(0, 1fr); gap: 1.75rem; padding-bottom: 2.25rem; }
}

/* ---------- 15. tabs ---------- */
.db-tabs { width: 100%; }

.db-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  padding-bottom: .55rem;
  border-bottom: 1px solid rgba(147, 167, 188, .24);
}

.db-tabs__tab {
  position: relative;
  padding: .5rem .95rem;
  border: 1px solid transparent;
  border-radius: 3px 3px 0 0;
  background: transparent;
  color: var(--stone);
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .05em;
  line-height: 1.5;
  cursor: pointer;
  transition: color .18s var(--ease), background-color .18s var(--ease),
              border-color .18s var(--ease);
}

.db-tabs__tab:hover { color: var(--paper); background: rgba(147, 167, 188, .1); }

.db-tabs__tab[aria-selected="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-900);
  box-shadow: 0 0 0 1px var(--violet);
}

.db-tabs__panels { padding-top: 1.5rem; }

.db-tabs__panel { animation: db-panel-in 200ms var(--ease) both; }

@keyframes db-panel-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- 16. reveal ---------- */
.is-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .24s var(--ease), transform .24s var(--ease);
  transition-delay: calc(var(--reveal-i, 0) * 40ms);
}

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

/* ---------- 17. a11y / reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

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

  .db-btn:hover { transform: none; }
}