/* ==========================================================================
   必发体育 · 共享外壳样式 /assets/site.css
   分层：变量 → 重置 → 排版 → 通用组件 → 页头 → 框架导航 → 页脚 → 响应式
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --deep: #061426;
  --deep-2: #04101F;
  --panel: #0E2A47;
  --steel: #1B4368;
  --orange: #FF6A1A;
  --cyan: #17D1C4;
  --coral: #FF5A5F;
  --moss: #6E8B3D;
  --clay: #C0704A;
  --stone: #9AA6B2;
  --paper: #EDE6D6;
  --line: rgba(154, 166, 178, .26);
  --line-soft: rgba(154, 166, 178, .13);
  --line-strong: rgba(154, 166, 178, .52);
  --rail-w: 236px;
  --top-h: 68px;
  --maxw: 1300px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "Source Han Sans CN", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

html[data-rail="collapsed"] { --rail-w: 72px; }

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--top-h) + 16px);
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  padding-top: var(--top-h);
  padding-left: var(--rail-w);
  min-height: 100vh;
  background-color: var(--deep);
  background-image:
    radial-gradient(1100px 560px at 84% -12%, rgba(23, 209, 196, .10), transparent 62%),
    radial-gradient(820px 500px at -6% 104%, rgba(255, 106, 26, .10), transparent 60%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: clamp(16px, .32vw + 15px, 17px);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

[hidden] { display: none !important; }

/* ---------- 3. 排版 ---------- */
h1, h2, h3, h4 {
  margin: 0 0 .55em;
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.015em;
}
h1 { font-size: clamp(44px, 5.6vw, 72px); }
h2 { font-size: clamp(30px, 3.4vw, 40px); }
h3 { font-size: clamp(21px, 1.9vw, 26px); }
h4 { font-size: clamp(18px, 1.4vw, 20px); }

p { margin: 0 0 1.05em; max-width: 46ch; }

ul, ol { margin: 0 0 1.05em; padding-left: 1.2em; }

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

::selection { background: var(--orange); color: #170A02; }

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

/* ---------- 4. 通用工具与组件 ---------- */
.wrap {
  width: calc(100% - clamp(32px, 6vw, 88px));
  max-width: var(--maxw);
  margin-inline: auto;
}

.num,
.rail__no,
.stat__value,
.roundbar__value,
.footer-meta,
.footer-col__title,
.tag,
.media-frame__tag,
.season-chip,
.nav-toggle,
.breadcrumb {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.stack { display: grid; gap: clamp(14px, 1.8vw, 22px); }

.panel {
  position: relative;
  background: linear-gradient(180deg, rgba(14, 42, 71, .96), rgba(9, 27, 47, .96));
  border: 1px solid var(--line);
  border-left: 4px solid var(--clay);
  border-radius: 2px;
  padding: clamp(20px, 2.6vw, 32px);
}
.panel--shift { margin-left: clamp(6px, 1.4vw, 14px); }

.panel__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}
.panel__no {
  padding-top: 5px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
}
.panel__title { flex: 1; margin: 0; font-size: clamp(20px, 2vw, 26px); }
.panel__source {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--stone);
  font-family: var(--font-mono);
  max-width: none;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid currentColor;
  border-radius: 2px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--clay);
  background: rgba(192, 112, 74, .12);
}
.tag--cyan { color: var(--cyan); background: rgba(23, 209, 196, .12); }
.tag--coral { color: var(--coral); background: rgba(255, 90, 95, .12); }
.tag--moss { color: #9CC05C; background: rgba(110, 139, 61, .18); }

.stat { display: flex; flex-direction: column; gap: 6px; }
.stat__value {
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}
.stat__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--stone);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--stone);
}
.breadcrumb a { color: var(--stone); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb__sep { color: var(--clay); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .62em 1.1em;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn--primary { background: var(--orange); color: #1B0D03; }
.btn--primary:hover { background: #FF8340; color: #1B0D03; transform: translateY(-1px); }
.btn--ghost { border-color: var(--line-strong); background: transparent; color: var(--paper); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn--block { width: 100%; }

/* 图片容器基础规则（页面阶段放 <img> 使用） */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(135deg, rgba(27, 67, 104, .92), rgba(6, 20, 38, .96));
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(154, 166, 178, .13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154, 166, 178, .13) 1px, transparent 1px);
  background-size: 36px 36px;
}
.media-frame > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06);
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--band { aspect-ratio: 21 / 9; }
.media-frame__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 5px 10px;
  background: var(--clay);
  color: #150903;
  font-size: 11px;
  letter-spacing: .14em;
}

/* 显现动画 */
@media (prefers-reduced-motion: no-preference) {
  html.js [data-reveal] {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity .5s var(--ease), transform .5s var(--ease);
  }
  html.js [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 5. 页头 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  background: rgba(6, 20, 38, .97);
  border-bottom: 1px solid var(--line);
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--orange);
  color: #170A02;
  font-size: 14px;
  font-weight: 700;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform .2s var(--ease);
}
.skip-link:focus { transform: none; color: #170A02; }

.topbar {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 26px);
  height: var(--top-h);
  max-width: 1800px;
  margin-inline: auto;
  padding-inline: clamp(14px, 2.4vw, 32px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--paper);
}
.brand:hover { color: var(--paper); }
.brand__mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--orange);
  color: #0A1420;
  font-size: 20px;
  font-weight: 900;
  border-radius: 2px;
  box-shadow: 4px 4px 0 rgba(192, 112, 74, .55);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.16; }
.brand__name { font-size: 17px; font-weight: 900; letter-spacing: .05em; }
.brand__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--stone);
}

.roundbar {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  padding: 6px 12px;
  max-width: none;
  border-left: 2px solid var(--clay);
  background: rgba(14, 42, 71, .72);
}
.roundbar__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--stone);
}
.roundbar__value { font-size: 14px; color: var(--cyan); }

.season-filter {
  display: flex;
  gap: 4px;
  margin-left: auto;
  padding: 3px;
  border: 1px solid var(--line);
  background: rgba(4, 16, 31, .6);
}
.season-chip {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--stone);
  font-size: 12px;
  letter-spacing: .08em;
  padding: 6px 12px;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.season-chip:hover { color: var(--paper); }
.season-chip[aria-pressed="true"] {
  background: var(--steel);
  border-color: rgba(23, 209, 196, .5);
  color: var(--paper);
}

.topbar__actions { display: flex; gap: 8px; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .12em;
  cursor: pointer;
  border-radius: 2px;
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars {
  position: relative;
  display: inline-block;
  width: 18px;
  height: 12px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: currentColor;
  transition: transform .22s var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

.progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(154, 166, 178, .18);
  overflow: hidden;
}
.progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
}

/* ---------- 6. 框架导航 ---------- */
.rail {
  position: fixed;
  top: var(--top-h);
  left: 0;
  bottom: 0;
  z-index: 110;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  border-right: 1px solid var(--line);
  background-image:
    linear-gradient(rgba(154, 166, 178, .05) 1px, transparent 1px),
    linear-gradient(180deg, var(--panel), var(--deep-2));
  background-size: 100% 30px, 100% 100%;
  transition: width .24s var(--ease), transform .28s var(--ease);
}

.rail__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 18px 12px;
  border-bottom: 1px solid var(--line-soft);
}
.rail__caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--clay);
}
.rail__collapse {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--stone);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  cursor: pointer;
  border-radius: 2px;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.rail__collapse:hover { border-color: var(--cyan); color: var(--cyan); }
.rail__collapse-icon { display: inline-block; transition: transform .24s var(--ease); }

.rail__list { list-style: none; margin: 0; padding: 10px 0; }
.rail__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  color: var(--paper);
  border-left: 2px solid transparent;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.rail__link:hover { background: rgba(27, 67, 104, .85); border-left-color: var(--clay); color: var(--paper); }
.rail__link[aria-current="page"] {
  background: var(--steel);
  border-left-color: var(--orange);
  color: var(--paper);
}
.rail__link[aria-current="page"] .rail__no { color: var(--orange); }
.rail__no {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--stone);
}
.rail__label { font-size: 14px; font-weight: 700; letter-spacing: .02em; }

.rail__actions {
  display: none;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
  padding: 16px 18px;
  border-top: 1px solid var(--line-soft);
}

.rail__foot {
  margin-top: auto;
  padding: 16px 18px 20px;
  border-top: 1px solid var(--line-soft);
}
.rail__foot-label,
.rail__foot-value { margin: 0; max-width: none; }
.rail__foot-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .22em;
  color: var(--clay);
}
.rail__foot-value { font-size: 13px; color: var(--stone); }

html[data-rail="collapsed"] .rail__head { justify-content: center; padding-inline: 8px; }
html[data-rail="collapsed"] .rail__caption { display: none; }
html[data-rail="collapsed"] .rail__collapse-text { display: none; }
html[data-rail="collapsed"] .rail__collapse-icon { transform: rotate(180deg); }
html[data-rail="collapsed"] .rail__link { padding-inline: 24px; }
html[data-rail="collapsed"] .rail__label { opacity: 0; }
html[data-rail="collapsed"] .rail__foot { display: none; }

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 105;
  background: rgba(4, 14, 26, .68);
  opacity: 0;
  pointer-events: none;
  transition: opacity .24s var(--ease);
}
.nav-scrim[data-active] { opacity: 1; pointer-events: auto; }

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, var(--deep-2), #030B16);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(340px, 42%);
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--clay));
}

.to-top {
  position: fixed;
  right: clamp(14px, 2.4vw, 30px);
  bottom: clamp(14px, 2.4vw, 30px);
  z-index: 100;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: var(--panel);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity .24s var(--ease), transform .24s var(--ease), background .2s var(--ease), color .2s var(--ease);
}
.to-top[data-visible] { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { background: var(--steel); color: var(--cyan); }

.footer-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.5fr) repeat(4, minmax(120px, 1fr));
  gap: clamp(20px, 3vw, 44px);
  padding-block: clamp(36px, 5vw, 64px);
}

.footer-brand__mark {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--clay);
  color: #160B04;
  font-size: 20px;
  font-weight: 900;
  border-radius: 2px;
}
.footer-brand__name {
  margin: 14px 0 6px;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: .06em;
  max-width: none;
}
.footer-brand__desc {
  margin: 0 0 16px;
  max-width: 34ch;
  font-size: 13px;
  color: var(--stone);
}
.footer-contact {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay);
  background: rgba(14, 42, 71, .5);
}
.footer-contact__line {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--stone);
  word-break: break-word;
}

.footer-col__title {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--clay);
}
.footer-col__title::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  margin-top: 8px;
  background: currentColor;
  opacity: .7;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.footer-col a { color: var(--stone); font-size: 14px; }
.footer-col a:hover { color: var(--cyan); }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 28px;
  padding-block: 18px 26px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--stone);
}
.footer-status { display: inline-flex; align-items: center; gap: 8px; }
.footer-status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--moss);
  box-shadow: 0 0 0 3px rgba(110, 139, 61, .22);
}

/* ---------- 8. 内容容器 ---------- */
#main-content {
  display: block;
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 44px);
  padding-block: clamp(24px, 3.6vw, 56px);
}

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1240px) {
  .roundbar { display: none; }
}

@media (max-width: 1024px) {
  body { padding-left: 0; }
  html[data-rail="collapsed"] { --rail-w: 236px; }

  .season-filter { display: none; }
  .topbar__actions { display: none; }
  .nav-toggle { display: inline-flex; margin-left: auto; }

  .rail {
    width: min(288px, 86vw);
    transform: translateX(-104%);
    box-shadow: 26px 0 64px rgba(0, 0, 0, .55);
    background-image:
      linear-gradient(rgba(154, 166, 178, .05) 1px, transparent 1px),
      linear-gradient(180deg, var(--panel), var(--deep-2));
  }
  .rail[data-open] { transform: none; }

  .rail__collapse { display: none; }
  .rail__actions { display: flex; }
  .rail__head { justify-content: flex-start; }

  html[data-rail="collapsed"] .rail__caption { display: inline; }
  html[data-rail="collapsed"] .rail__collapse-text { display: inline; }
  html[data-rail="collapsed"] .rail__link { padding-inline: 18px; }
  html[data-rail="collapsed"] .rail__label { opacity: 1; }
  html[data-rail="collapsed"] .rail__foot { display: block; }
}

@media (min-width: 1025px) {
  .nav-scrim { display: none; }
}

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

@media (max-width: 560px) {
  .brand__tag { display: none; }
  .brand__name { font-size: 16px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-meta { font-size: 11px; gap: 10px 18px; }
  .to-top { width: 42px; height: 42px; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  html.js [data-reveal] { opacity: 1; transform: none; }
}