/* ==========================================================================
   /assets/site.css — 完美体育官网 共享外壳与基础组件
   深墨绿夜场 + 灯光暖白 + 信号橙 / 电光青 + 围巾红蓝记忆点
   ========================================================================== */

/* ---------- 0. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

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

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

table { border-collapse: collapse; }

/* ---------- 1. Tokens ---------- */
:root {
  --ink-900: #061B16;
  --ink-800: #0C2A22;
  --ink-700: #103328;

  --warm: #F3E8D4;
  --mist: #B7C6BE;

  --orange: #FF6A1A;
  --orange-soft: #FF8340;
  --cyan: #25E3D0;
  --red: #D7283F;
  --blue: #2451D8;
  --violet: #8A6BFF;
  --paper: #E8DFCD;

  --line: rgba(183, 198, 190, 0.20);
  --line-strong: rgba(183, 198, 190, 0.38);

  --font-display: "Barlow Condensed", "DIN Condensed", "Arial Narrow",
                  "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei",
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace,
               SFMono-Regular, Menlo, Consolas, monospace;

  --shell: 1320px;
  --pad: clamp(1rem, 4vw, 2.5rem);

  --sp-1: 0.5rem;
  --sp-2: 1rem;
  --sp-3: 1.5rem;
  --sp-4: 2.5rem;
  --sp-5: 4rem;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 2. Base & 中文排版 ---------- */
html { scroll-behavior: smooth; }

body {
  min-height: 100%;
  background-color: var(--ink-900);
  color: var(--warm);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0.012em;
  color: var(--warm);
}

h1 { font-size: clamp(2.75rem, 8vw, 7.5rem); }
h2 { font-size: clamp(1.75rem, 3.4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.65rem); letter-spacing: 0.02em; }
h4 { font-size: clamp(1.05rem, 1.4vw, 1.25rem); letter-spacing: 0.03em; }

strong, b { font-weight: 700; color: var(--warm); }

small { font-size: 0.82em; }

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

::selection {
  background: var(--orange);
  color: #160800;
}

/* ---------- 3. 布局外壳 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section { padding-block: clamp(3rem, 6vw, 5.5rem); }

/* ---------- 4. 通用文字件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--orange);
}

.lede {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.8;
  color: var(--mist);
  max-width: 62ch;
}

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

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.65rem 1.15rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.3;
  text-align: center;
  border: 1px solid transparent;
  border-radius: 0;
  white-space: nowrap;
  transition: background-color 0.18s var(--ease),
              color 0.18s var(--ease),
              border-color 0.18s var(--ease),
              transform 0.18s var(--ease);
}

.btn--primary {
  background-color: var(--orange);
  border-color: var(--orange);
  color: #160800;
}
.btn--primary:hover { background-color: var(--orange-soft); border-color: var(--orange-soft); transform: translateY(-1px); }
.btn--primary:active { transform: translateY(0); }

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

.btn--quiet {
  background-color: rgba(243, 232, 212, 0.06);
  border-color: transparent;
  color: var(--warm);
}
.btn--quiet:hover { background-color: rgba(243, 232, 212, 0.13); }

.btn--sm { padding: 0.45rem 0.8rem; font-size: 0.8rem; }
.btn--block { width: 100%; }

/* ---------- 6. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: 0.4rem;
  z-index: 130;
  padding: 0.6rem 1rem;
  background-color: var(--cyan);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}
.skip-link:focus-visible { transform: translateY(0); outline-offset: 2px; }

/* ==========================================================================
   7. 头部
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background-image: linear-gradient(180deg, rgba(6, 27, 22, 0.98), rgba(6, 27, 22, 0.93));
  background-color: var(--ink-900);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-strong);
}

/* 命令栏 */
.cmd-bar { border-bottom: 1px solid var(--line); }

.cmd-bar__inner {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.75rem);
  min-height: 64px;
  padding-block: 0.55rem;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex: 0 0 auto;
  color: var(--warm);
  transition: opacity 0.18s var(--ease);
}
.brand:hover { opacity: 0.86; }

.brand__mark {
  display: inline-flex;
  align-items: flex-end;
  gap: 4px;
  height: 28px;
  flex: 0 0 auto;
}
.brand__mark > span {
  display: block;
  width: 6px;
  transition: height 0.22s var(--ease);
}
.brand__mark > span:first-child { height: 100%; background-color: var(--red); }
.brand__mark > span:last-child { height: 68%; background-color: var(--blue); }
.brand:hover .brand__mark > span:last-child { height: 100%; }

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--warm);
}

.brand__note {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

/* 归档状态胶囊 */
.cmd-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-inline-start: auto;
  min-width: 0;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--line);
  background-color: rgba(37, 227, 208, 0.05);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--mist);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cmd-status__dot {
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  background-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(37, 227, 208, 0.15);
  animation: statusPulse 2.6s ease-in-out infinite;
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.42; transform: scale(0.78); }
}

.cmd-bar__cta { flex: 0 0 auto; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  flex: 0 0 auto;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line-strong);
  color: var(--warm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  transition: border-color 0.18s var(--ease),
              color 0.18s var(--ease),
              background-color 0.18s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle[aria-expanded="true"] {
  background-color: rgba(37, 227, 208, 0.12);
  border-color: var(--cyan);
  color: var(--cyan);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
  height: 14px;
}
.nav-toggle__bars > span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(1) { transform: translateY(6px) 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(-6px) rotate(-45deg); }

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

/* 栏目轨 */
.site-nav {
  background-color: rgba(12, 42, 34, 0.72);
  border-top: 1px solid var(--line);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.site-nav__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(0.6rem, 1.8vw, 1.9rem);
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.75rem 0;
  font-size: 0.94rem;
  font-weight: 500;
  color: rgba(243, 232, 212, 0.8);
  transition: color 0.18s var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.4rem;
  height: 2px;
  background-color: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible { color: var(--warm); }
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] {
  color: var(--warm);
  font-weight: 700;
}
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background-color: var(--cyan);
}

.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  color: rgba(183, 198, 190, 0.55);
  transition: color 0.18s var(--ease);
}
.site-nav__link:hover .site-nav__idx,
.site-nav__link[aria-current="page"] .site-nav__idx { color: var(--cyan); }

.site-nav__label { display: inline-block; }

.site-nav__tagline {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: rgba(183, 198, 190, 0.6);
  white-space: nowrap;
}

/* 头部灯带进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}
.scroll-progress > span {
  display: block;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(90deg, var(--cyan), var(--orange));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.12s linear;
}

/* ==========================================================================
   8. 页脚
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 7vw, 6rem);
  background-color: var(--ink-800);
  border-top: 1px solid var(--line-strong);
}

.site-footer__stripe {
  height: 5px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--red) 0 44px,
    var(--warm) 44px 48px,
    var(--blue) 48px 90px,
    var(--warm) 90px 94px
  );
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.35fr 0.75fr 1fr;
  align-items: start;
  gap: clamp(1.75rem, 4vw, 3.5rem);
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.footer__brand-line {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.02em;
  color: var(--warm);
}

.footer__brand-note {
  margin-top: 0.8rem;
  max-width: 34ch;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}

.footer__cta { margin-top: 1.5rem; }

.footer__title {
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer__links {
  display: grid;
  gap: 0.55rem;
}
.footer__links a {
  display: inline-block;
  font-size: 0.92rem;
  color: rgba(243, 232, 212, 0.78);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.footer__links a:hover,
.footer__links a:focus-visible {
  color: var(--warm);
  border-bottom-color: var(--orange);
}

.footer__contact-list {
  display: grid;
  gap: 0.65rem;
}
.footer__contact-list li {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--mist);
}
.footer__label {
  flex: 0 0 3.4em;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  color: rgba(183, 198, 190, 0.6);
}
.footer__value {
  color: var(--warm);
  word-break: break-word;
}

.footer__note {
  margin-top: 0.9rem;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--mist);
}

.footer__legal {
  background-color: rgba(6, 27, 22, 0.6);
  border-top: 1px solid var(--line);
}
.footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: rgba(183, 198, 190, 0.72);
}

/* ==========================================================================
   9. 通用页面组件
   ========================================================================== */
/* 面包屑 */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding-block: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.breadcrumbs a {
  color: var(--mist);
  transition: color 0.18s var(--ease);
}
.breadcrumbs a:hover,
.breadcrumbs a:focus-visible { color: var(--cyan); }
.breadcrumbs__sep { color: var(--line-strong); }
.breadcrumbs [aria-current="page"] { color: var(--warm); }

/* 网格 */
.grid {
  display: grid;
  gap: clamp(1rem, 2.2vw, 1.75rem);
}
.grid--split  { grid-template-columns: 5fr 7fr; }
.grid--half   { grid-template-columns: 1fr 1fr; }
.grid--thirds { grid-template-columns: repeat(3, 1fr); }

/* 正文容器 */
.prose {
  max-width: 66ch;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: rgba(243, 232, 212, 0.9);
}
.prose h2 {
  margin-top: 2.2em;
  margin-bottom: 0.6em;
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
}
.prose h3 {
  margin-top: 1.8em;
  margin-bottom: 0.5em;
}
.prose h2:first-child,
.prose h3:first-child { margin-top: 0; }
.prose p + p { margin-top: 1.05em; }
.prose ul,
.prose ol {
  margin: 1em 0;
  padding-left: 1.35em;
  list-style: disc;
}
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.45em; }
.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}
.prose a:hover { color: var(--warm); }
.prose strong { color: var(--warm); }
.prose blockquote {
  margin: 1.6em 0;
  padding-left: 1.1rem;
  border-left: 2px solid var(--orange);
  color: var(--mist);
}
.prose hr {
  height: 1px;
  border: 0;
  margin: 2em 0;
  background: var(--line);
}
.prose table {
  width: 100%;
  margin: 1.4em 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
}
.prose th,
.prose td {
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.prose th {
  color: var(--cyan);
  font-weight: 600;
  letter-spacing: 0.06em;
}

/* 响应式图片容器（页面阶段放 <img> 或占位块） */
.media {
  position: relative;
  overflow: hidden;
  background-color: var(--ink-700);
  border: 1px solid var(--line);
}
.media img,
.media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--wide  { aspect-ratio: 21 / 9; }
.media--16x9  { aspect-ratio: 16 / 9; }
.media--4x5   { aspect-ratio: 4 / 5; }
.media--square{ aspect-ratio: 1 / 1; }

.media__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  display: inline-block;
  padding: 0.35rem 0.6rem;
  background-color: var(--ink-900);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

/* ---------- 10. 滚动显现协议 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   11. 响应式
   ========================================================================== */
@media (max-width: 1120px) {
  .cmd-status {
    font-size: 0.66rem;
    padding: 0.3rem 0.5rem;
  }
}

@media (max-width: 960px) {
  .grid--split,
  .grid--thirds { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 940px) {
  .cmd-bar__inner {
    min-height: 58px;
    gap: 0.6rem;
  }

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

  .site-nav {
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.28s var(--ease), visibility 0.28s var(--ease);
  }
  .site-nav[data-open="true"] {
    max-height: 34rem;
    visibility: visible;
  }

  .site-nav__inner {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: 0.4rem 1rem;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    flex-wrap: nowrap;
  }
  .site-nav__item + .site-nav__item { border-top: 1px solid var(--line); }

  .site-nav__link {
    width: 100%;
    padding: 0.9rem 0.15rem;
    font-size: 1rem;
  }
  .site-nav__link::after {
    bottom: 0;
    left: 0;
    right: auto;
    width: 44px;
  }

  .site-nav__tagline {
    display: block;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 780px) {
  .cmd-status { display: none; }
  .cmd-bar__cta { margin-inline-start: auto; }
}

@media (max-width: 700px) {
  .grid--half { grid-template-columns: 1fr; }
  .media--wide { aspect-ratio: 16 / 9; }
}

@media (max-width: 640px) {
  .brand__note { display: none; }
  .brand__name { font-size: 1.1rem; }
  .nav-toggle__label { display: none; }
  .cmd-bar__cta {
    padding: 0.5rem 0.75rem;
    font-size: 0.82rem;
  }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__contact-list li { flex-direction: column; gap: 0.15rem; }
  .footer__label { flex: none; }
  .footer__legal-inner { flex-direction: column; align-items: flex-start; }
}

/* ---------- 12. 降低动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

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

  .cmd-status__dot { animation: none; opacity: 1; }

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