/* ============================================================
   /assets/site.css —— 大发体育方 共享外壳与通用组件
   ============================================================ */

/* ---------- 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[class],
ol[class] {
  list-style: none;
  padding: 0;
}

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

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

a { color: inherit; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #071426;
  --sea: #0B1F3A;
  --panel: #102A4C;
  --signal: #FF6B2C;
  --signal-soft: #FF9A5E;
  --ice: #7C93AD;
  --rock: #A8B4C2;
  --fog: #F2F6FA;
  --moss: #5E7A63;
  --clay: #B5745C;
  --line: #24415F;

  --font-head: "Noto Sans SC Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --shell: 1240px;
  --gutter: clamp(1rem, 3.5vw, 3rem);
  --radius: 0px;
  --ease: cubic-bezier(.2, .6, .2, 1);

  --on-signal: #170903;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(120% 80% at 50% -10%, rgba(16, 42, 76, .85), transparent 62%),
    repeating-linear-gradient(90deg, rgba(36, 65, 95, .16) 0 1px, transparent 1px 96px);
  color: var(--fog);
  font-family: var(--font-body);
  font-size: clamp(.95rem, .9rem + .18vw, 1.05rem);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

body.has-nav-open { overflow: hidden; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.015em;
  color: var(--fog);
}

::selection {
  background: var(--signal);
  color: var(--on-signal);
}

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--signal-soft);
  outline-offset: 3px;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

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

.skip-link {
  position: fixed;
  top: .75rem;
  left: .75rem;
  z-index: 200;
  transform: translateY(-180%);
  background: var(--signal);
  color: var(--on-signal);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: .9rem;
  letter-spacing: .04em;
  padding: .65rem 1.1rem;
  text-decoration: none;
  border: 1px solid var(--signal-soft);
  transition: transform .2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible { transform: none; }

/* 滚动进度条（由 JS 注入） */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 120;
  background: rgba(36, 65, 95, .55);
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--signal), var(--signal-soft));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 44px;
  padding: .65rem 1.2rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  color: var(--fog);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: .9rem;
  letter-spacing: .05em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.btn--signal {
  background: var(--signal);
  color: var(--on-signal);
  border-color: var(--signal);
}

.btn--signal:hover {
  background: var(--signal-soft);
  border-color: var(--signal-soft);
}

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

.btn--ghost:hover {
  border-color: var(--signal);
  background: rgba(255, 107, 44, .1);
}

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--sea);
  box-shadow: 0 1px 0 var(--line);
}

/* 上层：品牌铭牌 + 快捷入口 */
.util-bar {
  overflow: hidden;
  max-height: 160px;
  visibility: visible;
  background: linear-gradient(180deg, rgba(11, 31, 58, 1), rgba(11, 31, 58, .94));
  border-bottom: 1px solid var(--line);
  transition: max-height .3s var(--ease), opacity .25s var(--ease), visibility .3s var(--ease);
}

.site-header.is-condensed .util-bar {
  max-height: 0;
  opacity: 0;
  visibility: hidden;
  border-bottom-color: transparent;
}

.util-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 2rem;
  min-height: 68px;
  padding-block: .65rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  min-width: 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  background: linear-gradient(150deg, var(--signal), #D9500F);
  color: #1B0A02;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.15rem;
  border-radius: var(--radius);
}

.brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.14rem;
  letter-spacing: .04em;
  color: var(--fog);
  text-decoration: none;
  line-height: 1.3;
}

.brand__name:hover { color: var(--signal-soft); }

.brand__tagline {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--ice);
  line-height: 1.5;
}

.util-bar__aside {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.quick-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem 1.1rem;
}

.quick-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  padding-block: .35rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.quick-nav__link::before {
  content: "—";
  color: var(--line);
  transition: color .16s var(--ease);
}

.quick-nav__link:hover {
  color: var(--fog);
  border-bottom-color: var(--signal);
}

.quick-nav__link:hover::before { color: var(--signal); }

/* 下层：栏目带 */
.nav-bar {
  background: rgba(7, 20, 38, .92);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.nav-bar__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 56px;
}

.nav-bar__label {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .24em;
  color: var(--ice);
  white-space: nowrap;
}

.nav-bar__label::after {
  content: "";
  width: 2.2rem;
  height: 1px;
  background: var(--line);
}

.primary-nav { margin-left: auto; }

.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .1rem;
  counter-reset: nav-item;
}

.primary-nav__item { counter-increment: nav-item; }

.primary-nav__link {
  display: block;
  padding: .7rem .8rem;
  color: var(--rock);
  font-size: .9rem;
  letter-spacing: .02em;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}

.primary-nav__link::before {
  content: counter(nav-item, decimal-leading-zero);
  margin-right: .45rem;
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: 0;
  color: var(--ice);
  opacity: .85;
  transition: color .16s var(--ease);
}

.primary-nav__link:hover {
  color: var(--fog);
  background: rgba(16, 42, 76, .75);
  border-bottom-color: var(--signal);
}

.primary-nav__link:hover::before { color: var(--signal-soft); }

.primary-nav__link[aria-current="page"] {
  color: var(--fog);
  border-bottom-color: var(--signal);
}

.primary-nav__link[aria-current="page"]::before { color: var(--signal); }

/* 移动端开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .55rem;
  min-height: 44px;
  min-width: 44px;
  margin-left: auto;
  padding: .55rem .7rem;
  position: relative;
  z-index: 90;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--fog);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  cursor: pointer;
  transition: border-color .16s var(--ease), color .16s var(--ease);
}

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

.nav-toggle[aria-expanded="true"] {
  border-color: var(--signal);
  color: var(--signal);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
}

.nav-toggle__text--close { display: none; }

.nav-toggle[aria-expanded="true"] .nav-toggle__text--open { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle__text--close { display: inline; }

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(4, 10, 20, .68);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s var(--ease);
}

.nav-scrim.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- 7. 正文通用组件 ---------- */
.page {
  padding-block: clamp(2rem, 5vw, 3.5rem) 0;
}

.page-head {
  max-width: 76ch;
  padding-block-end: clamp(1.5rem, 4vw, 2.75rem);
}

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

.eyebrow::before {
  content: "—";
  color: var(--signal);
}

.display {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 5.2vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--fog);
}

.lede {
  max-width: 70ch;
  margin-top: 1rem;
  color: var(--rock);
  font-size: clamp(1rem, 1.3vw, 1.1rem);
  line-height: 1.85;
}

.section {
  padding-block: clamp(2rem, 4vw, 3.25rem);
  border-top: 1px solid var(--line);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .75rem 1.5rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  color: var(--fog);
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}

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

.panel {
  background: var(--sea);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
}

.tag {
  display: inline-block;
  padding: .22rem .55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--ice);
}

.tag--signal {
  color: var(--signal);
  border-color: rgba(255, 107, 44, .55);
}

.tag--moss {
  color: #9BBB9F;
  border-color: rgba(94, 122, 99, .7);
}

.tag--clay {
  color: #D79B85;
  border-color: rgba(181, 116, 92, .7);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--ice);
}

.breadcrumbs a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.breadcrumbs a:hover {
  color: var(--fog);
  border-bottom-color: var(--signal);
}

.breadcrumbs__sep { color: var(--line); }

.breadcrumbs [aria-current="page"] { color: var(--fog); }

/* 图片容器基础规则（页面阶段放置占位图） */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--panel);
  background-image:
    linear-gradient(150deg, rgba(16, 42, 76, .95), rgba(7, 20, 38, .95)),
    repeating-linear-gradient(0deg, rgba(242, 246, 250, .05) 0 1px, transparent 1px 4px);
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.85) contrast(1.04);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg, rgba(242, 246, 250, .035) 0 1px, transparent 1px 3px);
}

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 100%;
  padding: .55rem .8rem;
  background: rgba(7, 20, 38, .88);
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--rock);
}

/* 渐显（需 JS 添加 .js-ready） */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .45s var(--ease), transform .45s var(--ease);
}

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

/* ---------- 8. 页脚 ---------- */
.site-footer {
  margin-top: clamp(3rem, 8vw, 6rem);
  background-color: var(--sea);
  background-image:
    radial-gradient(110% 90% at 0% 0%, rgba(16, 42, 76, .95), transparent 58%),
    repeating-linear-gradient(90deg, rgba(36, 65, 95, .22) 0 1px, transparent 1px 120px);
  border-top: 1px solid var(--line);
  color: var(--rock);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.footer-brand__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  letter-spacing: .02em;
  color: var(--fog);
  line-height: 1.2;
}

.footer-brand__name::before {
  content: "";
  display: inline-block;
  width: .5rem;
  height: .5rem;
  margin-right: .6rem;
  vertical-align: .16em;
  background: var(--signal);
}

.footer-brand__note {
  margin-top: .6rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--ice);
}

.footer-summary {
  margin-top: 1.15rem;
  max-width: 40ch;
  padding-left: 1rem;
  border-left: 2px solid var(--line);
  font-size: .9rem;
  line-height: 1.85;
  color: var(--rock);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.75rem clamp(1rem, 3vw, 2.5rem);
}

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

.footer-col__title {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding-bottom: .55rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--fog);
}

.footer-col__title::before {
  content: "—";
  color: var(--signal);
}

.footer-links {
  margin-top: .95rem;
  display: grid;
  gap: .5rem;
}

.footer-links a {
  display: inline-block;
  width: fit-content;
  color: var(--rock);
  font-size: .9rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.footer-links a:hover {
  color: var(--fog);
  border-bottom-color: var(--signal);
}

.footer-contact {
  margin-top: .95rem;
  display: grid;
  gap: .9rem;
}

.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .3rem .5rem;
  min-width: 0;
}

.footer-contact__key {
  display: block;
  width: 100%;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .14em;
  color: var(--ice);
}

.footer-contact__val {
  color: var(--fog);
  font-size: .88rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.copy-btn {
  min-height: 28px;
  padding: .15rem .5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ice);
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .12em;
  cursor: pointer;
  transition: color .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}

.copy-btn:hover {
  color: var(--fog);
  border-color: var(--signal);
  background: rgba(255, 107, 44, .1);
}

.copy-btn.is-copied {
  color: var(--signal);
  border-color: var(--signal);
}

.footer-legal {
  border-top: 1px solid var(--line);
  background: rgba(5, 15, 29, .88);
}

.footer-legal__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem 1.5rem;
  padding-block: 1.1rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--ice);
}

.footer-legal__copy { color: var(--ice); }

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.1rem;
  margin-left: auto;
}

.footer-legal__links a {
  color: var(--rock);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.footer-legal__links a:hover {
  color: var(--fog);
  border-bottom-color: var(--signal);
}

.footer-legal__icp { color: var(--ice); }

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1180px) {
  .util-bar__aside .quick-nav { display: none; }
}

@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }

  .nav-bar__label { display: none; }

  .primary-nav {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 80;
    width: min(340px, 86vw);
    margin: 0;
    padding: 4.75rem 1.5rem 2rem;
    overflow-y: auto;
    background: linear-gradient(180deg, var(--sea), #061324);
    border-left: 1px solid var(--line);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform .28s var(--ease), visibility .28s var(--ease);
  }

  .primary-nav[data-open="true"] {
    transform: none;
    visibility: visible;
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .primary-nav__link {
    padding: .95rem .25rem;
    font-size: 1.02rem;
    border-bottom: 1px solid var(--line);
    border-left: 2px solid transparent;
    border-top: 0;
  }

  .primary-nav__link:hover {
    background: rgba(16, 42, 76, .55);
    border-bottom-color: var(--line);
    border-left-color: var(--signal);
  }

  .primary-nav__link[aria-current="page"] {
    padding-left: .8rem;
    background: rgba(255, 107, 44, .1);
    border-bottom-color: var(--line);
    border-left-color: var(--signal);
  }
}

@media (max-width: 960px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

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

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

  .footer-legal__links { margin-left: 0; }
}

@media (max-width: 720px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

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

  .brand__tagline { font-size: .64rem; }

  .util-bar__aside .btn { padding-inline: .9rem; font-size: .82rem; }

  .footer-summary { max-width: none; }
}

@media (max-width: 420px) {
  .brand__mark { width: 34px; height: 34px; font-size: 1rem; }
  .footer-legal__inner { font-size: .68rem; }
}

/* ---------- 10. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .skip-link { transition: none; }

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