/* ============================================================
   博鱼体育 · /assets/site.css
   夜间球场灯光 × 城市脉搏 —— 共享外壳与基础组件
   ============================================================ */

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

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

body { margin: 0; }

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

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

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

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

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

/* ---------- 2. Tokens ---------- */
:root {
  --ink-900: #071A2E;
  --ink-800: #0B2238;
  --ink-700: #0F2C48;
  --ink-950: #1A1230;

  --paper: #F5F0E6;
  --paper-2: #EBE3D4;
  --paper-ink: #232A33;

  --cyan: #37E2D5;
  --cyan-deep: #0E6E63;
  --green: #86FF5E;
  --red: #FF3B5C;
  --dust: #8C9AAB;
  --bronze: #C98A4B;

  --text-soft: #B9C7D6;
  --text-dim: #8A99AA;
  --line: rgba(140, 154, 171, 0.20);
  --line-cyan: rgba(55, 226, 213, 0.22);

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1240px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --cut-l: 22px;
  --cut-s: 14px;
  --radius: 2px;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. Base typography ---------- */
body {
  background-color: var(--ink-900);
  color: var(--text-soft);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.9;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color .18s var(--ease);
}

a:hover { color: #7BF0E6; }

strong { font-weight: 700; color: var(--paper); }

code, kbd, samp {
  font-family: var(--font-mono);
  font-size: .92em;
  color: var(--green);
}

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

::selection {
  background: rgba(55, 226, 213, 0.32);
  color: var(--paper);
}

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

.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); position: relative; }
.section--panel { background: var(--ink-700); }
.section--ink { background: var(--ink-800); }
.section--deep { background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-950) 100%); }
.section--paper { background: var(--paper); color: var(--paper-ink); }

.grid { display: grid; gap: clamp(1rem, 2.5vw, 1.75rem); }
.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)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr)); }

.grid-veil { position: relative; }
.grid-veil::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(55, 226, 213, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(55, 226, 213, 0.055) 1px, transparent 1px);
  background-size: 56px 56px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: .9rem;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: currentColor;
  flex: none;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  line-height: 1.18;
  letter-spacing: -.015em;
  color: var(--paper);
  margin-bottom: .9rem;
}

.section--paper .section-title { color: #10161D; }

.lede {
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.9;
  color: var(--text-soft);
  max-width: 62ch;
}

.annote {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: .7rem;
  letter-spacing: .26em;
  color: var(--text-dim);
  font-weight: 500;
}

.reading {
  background: var(--paper);
  color: var(--paper-ink);
  line-height: 1.9;
}

.reading h2,
.reading h3 { color: #10161D; }

.reading a {
  color: var(--cyan-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.reading a:hover { color: #08554C; }

.cut-panel {
  position: relative;
  background: var(--ink-700);
  padding: clamp(1.5rem, 3.5vw, 2.75rem);
  clip-path: polygon(0 0, calc(100% - var(--cut-l)) 0, 100% var(--cut-l), 100% 100%, var(--cut-l) 100%, 0 calc(100% - var(--cut-l)));
}

.cut-panel--paper { background: var(--paper); color: var(--paper-ink); }
.cut-panel--edge { clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), 0 100%); }

/* ---------- 5. Skip link ---------- */
.skip-link {
  position: fixed;
  top: .6rem;
  left: .6rem;
  z-index: 200;
  padding: .7rem 1.15rem;
  background: var(--paper);
  color: var(--ink-900);
  font-weight: 700;
  font-size: .88rem;
  letter-spacing: .02em;
  border-radius: var(--radius);
  transform: translateY(-220%);
  transition: transform .2s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 6. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: linear-gradient(180deg, #0A2138 0%, #071A2E 100%);
  border-bottom: 1px solid var(--line-cyan);
}

.site-header__bar { padding-block: .65rem .5rem; }

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
}

.masthead__meta {
  display: flex;
  flex-direction: column;
  gap: .1rem;
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .2em;
  line-height: 1.5;
  color: var(--text-dim);
}

.masthead__meta-k { color: var(--bronze); }

.masthead__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .1rem;
  color: var(--paper);
  text-align: center;
}

.masthead__brand:hover { color: var(--paper); }

.masthead__brand-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 3.2vw, 1.9rem);
  letter-spacing: -.02em;
  line-height: 1.15;
}

.masthead__brand-tag {
  font-size: .62rem;
  letter-spacing: .36em;
  text-indent: .36em;
  color: var(--cyan);
  white-space: nowrap;
}

.masthead__tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .5rem;
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .42rem .8rem;
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .04em;
  white-space: nowrap;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  color: var(--paper);
  background: rgba(15, 44, 72, 0.62);
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.tool-btn:hover {
  background: rgba(55, 226, 213, 0.14);
  border-color: var(--cyan);
  color: var(--cyan);
}

.tool-btn--entry {
  border-color: rgba(255, 59, 92, 0.6);
}

.tool-btn--entry:hover {
  background: rgba(255, 59, 92, 0.2);
  border-color: var(--red);
  color: #FFD9DF;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: .45rem;
  padding: .42rem .65rem;
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--paper);
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

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

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 12px;
  flex: none;
}

.nav-toggle__bars > span {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform .22s var(--ease), opacity .18s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.site-nav {
  border-top: 1px solid var(--line);
  background: rgba(7, 26, 46, 0.78);
  transition: max-height .32s var(--ease), border-color .2s var(--ease);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(.25rem, 2vw, 1.6rem);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: .85rem .25rem 1rem;
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .02em;
  color: #CBD6E2;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: .25rem;
  right: .25rem;
  bottom: .55rem;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease);
}

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

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

/* ---------- 7. Footer ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, #071A2E 0%, #0C1B33 52%, #1A1230 100%);
  border-top: 1px solid var(--line-cyan);
  color: var(--text-soft);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .5;
  background-image: radial-gradient(circle, rgba(245, 240, 230, 0.3) 1px, transparent 1.5px);
  background-size: 170px 140px;
  background-position: 24px 32px;
}

.site-footer::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(55, 226, 213, 0) 44%, rgba(255, 59, 92, 0) 56%, var(--red) 100%);
  opacity: .75;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.8fr) minmax(0, 1.25fr);
  gap: clamp(1.75rem, 4vw, 3.25rem);
  padding-top: clamp(2.5rem, 5vw, 4rem);
  padding-bottom: clamp(1.75rem, 3vw, 2.5rem);
}

.footer-brand { display: flex; flex-direction: column; gap: .35rem; }

.footer-brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: -.02em;
  color: var(--paper);
}

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

.footer-brand__tag {
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--text-dim);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.footer-col { display: flex; flex-direction: column; gap: .85rem; }

.footer-col__title {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--bronze);
  margin: 0;
}

.footer-col__list { display: flex; flex-direction: column; gap: .55rem; }

.footer-col__list a {
  font-size: .9rem;
  color: #A9B8C8;
}

.footer-col__list a:hover {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.site-footer__contact { display: flex; flex-direction: column; gap: .85rem; }

.footer-contact { display: grid; gap: .85rem; }

.footer-contact__row { display: flex; flex-direction: column; gap: .18rem; }

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .16em;
  color: var(--text-dim);
}

.footer-contact__value {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
  font-size: .86rem;
  color: #D5DEE8;
  margin: 0;
}

.footer-contact__text {
  font-family: var(--font-mono);
  font-size: .8rem;
  word-break: break-all;
}

.footer-contact__text--wide {
  font-family: var(--font-body);
  font-size: .84rem;
  line-height: 1.7;
  word-break: normal;
}

.footer-contact__note {
  font-size: .76rem;
  line-height: 1.7;
  color: var(--text-dim);
  max-width: 34ch;
}

.site-footer__legal {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  padding-top: 1rem;
  padding-bottom: 1.6rem;
  border-top: 1px solid var(--line);
}

.footer-legal__meta {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--text-dim);
}

/* ---------- 8. Components ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .82rem 1.5rem;
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .02em;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.btn--primary {
  background: var(--red);
  color: var(--ink-900);
}

.btn--primary:hover { background: #FF6080; color: var(--ink-900); }

.btn--ghost {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn--ghost:hover {
  background: rgba(55, 226, 213, 0.14);
  color: var(--cyan);
}

.btn--quiet {
  border-color: var(--line);
  color: var(--text-soft);
}

.btn--quiet:hover { border-color: var(--cyan); color: var(--cyan); }

.copy-btn {
  display: inline-flex;
  align-items: center;
  padding: .26rem .6rem;
  font-size: .7rem;
  letter-spacing: .06em;
  color: var(--text-dim);
  border: 1px solid rgba(140, 154, 171, 0.45);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.copy-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.copy-btn[data-copied] { border-color: var(--green); color: var(--green); }

.breadcrumb { font-size: .8rem; margin-bottom: 1.4rem; }

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
}

.breadcrumb li { display: flex; align-items: center; gap: .45rem; }

.breadcrumb li + li::before {
  content: "/";
  color: rgba(140, 154, 171, 0.6);
}

.breadcrumb a { color: #A9B8C8; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb [aria-current="page"] { color: var(--paper); }

.tag {
  display: inline-flex;
  align-items: center;
  padding: .2rem .55rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  line-height: 1.6;
  border: 1px solid currentColor;
  border-radius: var(--radius);
}

.tag--cycle { color: var(--green); }
.tag--live { color: var(--red); }
.tag--note { color: var(--cyan); }
.tag--index { color: var(--bronze); }

.data-card {
  position: relative;
  overflow: hidden;
  padding: 1.35rem 1.5rem 1.5rem;
  background: linear-gradient(160deg, #0F2C48 0%, #0B2238 100%);
  clip-path: polygon(0 0, calc(100% - var(--cut-l)) 0, 100% var(--cut-l), 100% 100%, var(--cut-l) 100%, 0 calc(100% - var(--cut-l)));
}

.data-card--paper {
  background: var(--paper);
  color: var(--paper-ink);
}

.data-card__value {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.data-card--paper .data-card__value { color: #0E6E63; }

.data-card__label {
  display: block;
  margin-top: .5rem;
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--text-dim);
}

.data-card--paper .data-card__label { color: #5C6774; }

.data-card__band {
  position: absolute;
  top: 0;
  right: 0;
  width: 36%;
  height: 3px;
  background: linear-gradient(90deg, rgba(55, 226, 213, 0), var(--cyan));
}

.data-card--paper .data-card__band {
  background: linear-gradient(90deg, rgba(201, 138, 75, 0), var(--bronze));
}

.timeline { position: relative; padding-left: .2rem; }

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(55, 226, 213, 0.06));
}

.timeline__item {
  position: relative;
  padding-left: 2.2rem;
  padding-bottom: 1.8rem;
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .42rem;
  width: 16px;
  height: 16px;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}

.timeline__item[aria-current="true"]::before,
.timeline__item.is-active::before {
  background: var(--green);
  border-color: var(--green);
}

.timeline__time {
  display: block;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--bronze);
  margin-bottom: .3rem;
}

.timeline__body { color: var(--text-soft); }

.img-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(140deg, #0F2C48 0%, #131A33 100%);
}

.img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(55, 226, 213, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(55, 226, 213, 0.06) 1px, transparent 1px);
  background-size: 44px 44px;
}

.img-frame img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.img-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: .45rem .85rem;
  font-size: .72rem;
  letter-spacing: .06em;
  background: rgba(7, 26, 46, 0.82);
  color: var(--paper);
}

[data-section-link][aria-current="true"] { color: var(--cyan); }

/* ---------- 9. Responsive ---------- */
@media (max-width: 1000px) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  }
  .site-footer__contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .masthead {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: .75rem;
  }

  .masthead__meta { display: none; }
  .masthead__brand { align-items: flex-start; text-align: left; }

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

  .site-nav {
    max-height: 0;
    overflow: hidden;
    border-top-color: transparent;
  }

  .site-nav[data-open] {
    max-height: 34rem;
    border-top-color: var(--line);
  }

  .site-nav__list {
    flex-direction: column;
    gap: 0;
    padding-block: .35rem .95rem;
  }

  .site-nav__link {
    display: block;
    padding: .75rem .2rem;
    font-size: 1rem;
    border-bottom: 1px solid rgba(140, 154, 171, 0.12);
  }

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

  .site-nav__link[aria-current="page"] {
    padding-left: .8rem;
    box-shadow: inset 3px 0 0 var(--cyan);
  }
}

@media (max-width: 760px) {
  body { font-size: 16px; }

  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }

  .masthead__brand-tag { display: none; }

  .tool-btn {
    padding: .34rem .55rem;
    font-size: .7rem;
    letter-spacing: .02em;
  }

  .nav-toggle__text { display: none; }

  .section--paper,
  .cut-panel { padding-inline: 1.15rem; }
}

@media (max-width: 680px) {
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .site-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .site-footer__legal { flex-direction: column; }
  .footer-contact__note { max-width: none; }
}

@media (max-width: 400px) {
  .tool-btn--member { display: none; }
}

/* ---------- 10. Reduced 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;
    scroll-behavior: auto !important;
  }
}