/* ==========================================================================
   site.css — 天博体育官网 共享外壳
   1) Reset  2) Tokens  3) Base type  4) Layout  5) Buttons
   6) Breadcrumb  7) Panels / labels / figures  8) Header  9) Footer
   10) Motion
   ========================================================================== */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd { margin: 0; }

ul[class],
ol[class] { margin: 0; padding: 0; list-style: none; }

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

a { color: inherit; }

button { font: inherit; color: inherit; background: none; border: 0; }

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

/* ---------- 2. Tokens ---------- */
:root {
  /* 色彩 */
  --c-deep:      #06101C;
  --c-panel:     #0E2136;
  --c-line:      #1E3A55;
  --c-cyan:      #35E0CE;
  --c-amber:     #FFAE3C;
  --c-violet-a:  #2B1B47;
  --c-violet-b:  #4A2C6E;
  --c-stone:     #B9C3CC;
  --c-paper:     #F2F5F7;
  --c-terra:     #C06A4A;
  --c-moss:      #6E9A85;

  /* 字体 */
  --f-display: "Oswald", "Barlow Condensed", "PingFang SC", "Noto Sans SC",
               "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --f-body:    "Noto Sans SC", "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-num:     "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular,
               Menlo, Consolas, monospace;
  --f-editorial: "Source Serif 4", "Noto Serif SC", "Songti SC", Georgia, serif;

  /* 尺寸 */
  --gutter:  clamp(16px, 4vw, 40px);
  --maxw:    1400px;
  --cut:     14px;
  --dur:     .22s;
  --ease:    cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. Base type ---------- */
body {
  min-height: 100vh;
  background-color: var(--c-deep);
  background-image:
    linear-gradient(to right, rgba(30, 58, 85, .30) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 85, .30) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: center top;
  color: var(--c-paper);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.06;
  color: var(--c-paper);
}

p { color: inherit; }

a {
  color: var(--c-cyan);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

a:hover { color: var(--c-paper); }

strong { font-weight: 700; }

/* ---------- 4. Layout ---------- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.num {
  font-family: var(--f-num);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: -.02em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--c-cyan);
  flex: none;
}

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-family: var(--f-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .03em;
  line-height: 1.2;
  color: var(--c-paper);
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: transform var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
  color: var(--c-paper);
  border-color: var(--c-cyan);
}

.btn--primary {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-deep);
}

.btn--primary:hover {
  background: var(--c-amber);
  border-color: var(--c-amber);
  color: var(--c-deep);
}

.btn--ghost {
  background: transparent;
  color: var(--c-cyan);
  border-color: var(--c-line);
}

.btn--ghost:hover {
  background: rgba(53, 224, 206, .08);
  color: var(--c-paper);
}

/* ---------- 6. Breadcrumb ---------- */
.crumbs {
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: .10em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.crumbs__item { display: inline-flex; }

.crumbs__item a {
  color: var(--c-stone);
  text-decoration: none;
}

.crumbs__item a:hover { color: var(--c-cyan); }

.crumbs__item [aria-current="page"] { color: var(--c-amber); }

.crumbs__sep {
  color: var(--c-line);
  user-select: none;
}

/* ---------- 7. Panels / labels / figures ---------- */
.cut-panel {
  position: relative;
  background: var(--c-panel);
  padding: clamp(18px, 2.4vw, 28px);
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut))
  );
  transition: transform var(--dur) var(--ease);
}

.cut-panel:hover { transform: translateY(-2px); }

.figure {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  aspect-ratio: 16 / 9;
}

.figure__media {
  position: absolute;
  inset: 0;
}

.figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.78) contrast(1.08) brightness(.82);
}

.figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgba(6, 16, 28, .22) 0 1px, transparent 1px 3px),
    linear-gradient(145deg, rgba(43, 27, 71, .34), transparent 48%);
}

.figure__caption {
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0;
  z-index: 1;
  padding: 12px 14px;
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: .10em;
  color: var(--c-paper);
  background: linear-gradient(to top, rgba(6, 16, 28, .88), transparent);
}

.figure--wide { aspect-ratio: 21 / 9; }
.figure--tall { aspect-ratio: 3 / 4; }
.figure--square { aspect-ratio: 1 / 1; }

/* ---------- 8. Header ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--c-cyan);
  color: var(--c-deep);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  color: var(--c-deep);
  outline: 2px solid var(--c-paper);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 16, 28, .94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-block-end: 1px solid var(--c-line);
  color: var(--c-paper);
  transition: box-shadow var(--dur) var(--ease);
}

.site-header[data-stuck] {
  box-shadow: 0 10px 30px rgba(0, 0, 0, .45);
}

.site-header__wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* 顶部细条 */
.site-header__bar {
  background: rgba(14, 33, 54, .55);
  border-block-end: 1px solid rgba(30, 58, 85, .65);
}

.site-header__bar .site-header__wrap {
  min-height: 34px;
  font-family: var(--f-num);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.site-header__coord {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(185, 195, 204, .82);
}

.site-header__coord span {
  width: 5px;
  height: 5px;
  background: var(--c-cyan);
  box-shadow: 0 0 0 3px rgba(53, 224, 206, .16);
  flex: none;
}

.utility-nav__list {
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.utility-nav__list a {
  color: var(--c-stone);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.utility-nav__list a:hover { color: var(--c-cyan); }

/* 主行 */
.site-header__main {
  background: linear-gradient(90deg, rgba(43, 27, 71, .28), transparent 46%);
}

.site-header__wrap--main {
  justify-content: flex-start;
  min-height: 72px;
  gap: clamp(14px, 2vw, 28px);
}

/* 左侧展签 */
.site-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  flex: none;
}

.site-mark__tick {
  display: block;
  width: 26px;
  height: 1px;
  background: var(--c-cyan);
  position: relative;
  flex: none;
}

.site-mark__tick::before,
.site-mark__tick::after {
  content: "";
  position: absolute;
  top: -3px;
  width: 1px;
  height: 7px;
  background: var(--c-cyan);
}

.site-mark__tick::before { left: 0; }
.site-mark__tick::after { right: 0; opacity: .4; }

.site-mark__kicker {
  font-family: var(--f-num);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(185, 195, 204, .72);
}

.site-mark__value {
  font-family: var(--f-editorial);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--c-paper);
}

/* 导航 */
.site-nav { margin-inline-start: clamp(20px, 3.4vw, 56px); }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 26px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__item { display: inline-flex; }

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 8px 0;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--c-stone);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0;
  height: 2px;
  background: var(--c-cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-nav__link:hover { color: var(--c-paper); }
.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] { color: var(--c-cyan); }

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c-amber);
}

/* 站名 */
.site-brand {
  margin-inline-start: auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 3px;
  padding-inline-start: clamp(16px, 2.4vw, 32px);
  border-inline-start: 1px solid var(--c-line);
  text-decoration: none;
  flex: none;
}

.site-brand__name {
  font-family: var(--f-display);
  font-size: clamp(17px, 1.6vw, 21px);
  font-weight: 800;
  letter-spacing: .03em;
  color: var(--c-paper);
  line-height: 1;
}

.site-brand__sub {
  font-family: var(--f-num);
  font-size: 9px;
  letter-spacing: .22em;
  color: var(--c-cyan);
  line-height: 1;
}

.site-brand:hover .site-brand__name { color: var(--c-cyan); }

/* 主行动 */
.site-header__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--c-deep);
  background: var(--c-cyan);
  text-decoration: none;
  flex: none;
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
  transition: background-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}

.site-header__cta:hover {
  background: var(--c-amber);
  color: var(--c-deep);
  transform: translateY(-2px);
}

/* 移动开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  font-family: var(--f-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--c-paper);
  background: transparent;
  border: 1px solid var(--c-line);
  cursor: pointer;
  flex: none;
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
  flex: none;
}

.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) {
  transform: translateY(4.5px) 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(-4.5px) rotate(-45deg);
}

/* 进度条 */
.site-header__progress {
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-amber));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  will-change: transform;
}

/* ---------- 9. Footer ---------- */
.site-footer {
  position: relative;
  margin-block-start: clamp(72px, 11vw, 150px);
  overflow: hidden;
  color: var(--c-paper);
  border-block-start: 1px solid rgba(53, 224, 206, .22);
  background:
    radial-gradient(120% 96% at 12% 0%, rgba(74, 44, 110, .92) 0%, rgba(43, 27, 71, 0) 62%),
    linear-gradient(180deg, var(--c-violet-a) 0%, var(--c-violet-b) 46%, #14122C 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(242, 245, 247, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(242, 245, 247, .045) 1px, transparent 1px);
  background-size: 96px 96px;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(40px, 5.5vw, 72px) var(--gutter) clamp(18px, 2.6vw, 28px);
}

.site-footer__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px 40px;
  padding-block-end: clamp(24px, 3vw, 34px);
  border-block-end: 1px solid rgba(242, 245, 247, .16);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  color: var(--c-paper);
}

.footer-brand__name {
  font-family: var(--f-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  letter-spacing: .04em;
  line-height: 1;
  color: var(--c-paper);
}

.footer-brand__sub {
  font-family: var(--f-num);
  font-size: 10px;
  letter-spacing: .26em;
  color: var(--c-cyan);
  line-height: 1;
}

.footer-brand:hover .footer-brand__name { color: var(--c-cyan); }

.footer-note {
  max-width: 400px;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(242, 245, 247, .68);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(22px, 3vw, 44px);
  padding-block: clamp(28px, 3.6vw, 44px);
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin: 0 0 14px;
  padding-block-end: 8px;
  font-family: var(--f-body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .20em;
  text-transform: uppercase;
  color: var(--c-cyan);
  border-block-end: 1px solid rgba(53, 224, 206, .26);
}

.footer-col__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-col__list a {
  display: inline-block;
  font-size: 14px;
  color: rgba(242, 245, 247, .84);
  text-decoration: none;
  border-block-end: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-col__list a:hover,
.footer-col__list a:focus-visible {
  color: var(--c-cyan);
  border-block-end-color: var(--c-cyan);
}

.footer-col__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.95;
  color: rgba(242, 245, 247, .72);
  overflow-wrap: anywhere;
}

.footer-col__list + .footer-col__text { margin-block-start: 12px; }

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 28px;
  padding-block: 18px 0;
  border-block-start: 1px solid rgba(242, 245, 247, .14);
  font-family: var(--f-num);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(242, 245, 247, .58);
}

.site-footer__copy,
.site-footer__meta { margin: 0; }

/* ---------- 10. Responsive ---------- */
@media (max-width: 1100px) {
  .site-header__cta { display: none; }
}

@media (max-width: 1023px) {
  .site-header__wrap--main {
    min-height: 64px;
    flex-wrap: wrap;
  }

  .site-mark__kicker { display: none; }

  .site-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    margin-inline-start: 0;
    padding: 14px var(--gutter) 22px;
    background: var(--c-deep);
    border-block-end: 1px solid var(--c-line);
    box-shadow: 0 22px 40px rgba(0, 0, 0, .5);
    display: grid;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity var(--dur) var(--ease),
                transform var(--dur) var(--ease),
                visibility var(--dur) var(--ease);
  }

  .site-nav[data-open] {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .site-nav__list {
    display: grid;
    gap: 0;
  }

  .site-nav__item { display: block; }

  .site-nav__link {
    display: block;
    padding: 12px 0;
    font-size: 15px;
    color: var(--c-paper);
    border-block-end: 1px solid rgba(30, 58, 85, .7);
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"] {
    padding-inline-start: 12px;
    border-inline-start: 2px solid var(--c-amber);
  }

  .site-brand { margin-inline-start: auto; }

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

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 639px) {
  .site-header__coord { display: none; }

  .site-header__bar .site-header__wrap {
    justify-content: flex-end;
    min-height: 30px;
  }

  .utility-nav__list { gap: 14px; }

  .site-brand {
    padding-inline-start: 0;
    border-inline-start: 0;
  }

  .site-brand__sub { display: none; }

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

  .site-footer__base {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* ---------- 11. Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .btn:hover,
  .cut-panel:hover,
  .site-header__cta:hover { transform: none; }
}