/* ===== 非凡体育 Shared Site Kit ===== */
:root {
  --c-navy: #0A1F44;
  --c-green: #39FF14;
  --c-orange: #FF6B35;
  --c-light: #F4F6FA;
  --c-ink: #060C1A;
  --c-muted: #4A5A7A;
  --c-line: #C8D2E6;
  --c-success: #2EBD59;
  --c-danger: #E23B4D;
  --c-blue: #2E6FF2;
  --font-display: "Bebas Neue", "Arial Narrow", Impact, sans-serif;
  --font-body: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  --font-num: "DIN Alternate", Roboto, Arial, sans-serif;
  --frame-w: 280px;
  --container-w: 1180px;
  --pad: clamp(20px, 4vw, 46px);
  --shadow-hard: 8px 8px 0 rgba(10, 31, 68, 0.18);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  background-color: var(--c-light);
  background-image:
    radial-gradient(circle at 96% 4%, rgba(255, 107, 53, 0.09), transparent 28%),
    linear-gradient(rgba(10, 31, 68, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 31, 68, 0.035) 1px, transparent 1px);
  background-size: auto, 32px 32px, 32px 32px;
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  margin-left: var(--frame-w);
}

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

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

ul, ol {
  list-style: none;
}

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

button {
  background: none;
  border: 0;
  cursor: pointer;
}

::selection {
  background: var(--c-green);
  color: var(--c-navy);
}

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

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

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.2;
}

/* ===== Skip Link ===== */
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 300;
  background: var(--c-green);
  color: var(--c-navy);
  padding: 10px 18px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform 0.2s ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* ===== Header / Framework Navigation ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  display: flex;
  width: var(--frame-w);
  height: 100vh;
  background-color: var(--c-navy);
  background-image:
    linear-gradient(rgba(200, 210, 230, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 210, 230, 0.07) 1px, transparent 1px),
    linear-gradient(180deg, rgba(57, 255, 20, 0.08), rgba(255, 107, 53, 0.05));
  background-size: 28px 28px, 28px 28px, auto;
  color: #fff;
  border-right: 3px solid var(--c-green);
  z-index: 100;
  overflow: hidden;
}

.header-frame {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  padding: 32px 26px 22px;
  overflow-y: auto;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 22px;
  margin-bottom: 26px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 36px;
  line-height: 1;
  letter-spacing: 2px;
}

.brand-en {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 4px;
  color: var(--c-green);
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
}

.nav-toggle-box {
  display: inline-flex;
  align-items: center;
}

.site-nav {
  display: flex;
  width: 100%;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
}

.nav-item {
  width: 100%;
}

.nav-link {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 14px;
  color: rgba(255, 255, 255, 0.8);
  font-family: var(--font-display);
  font-size: 21px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  border-left: 3px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: -70%;
  top: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(57, 255, 20, 0.35), transparent);
  transform: skewX(-12deg);
  pointer-events: none;
  transition: left 0.35s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-green);
  background: linear-gradient(90deg, rgba(57, 255, 20, 0.14), transparent 70%);
  border-left-color: var(--c-orange);
}

.nav-link[aria-current="page"] {
  color: var(--c-green);
  border-left-color: var(--c-green);
  background: linear-gradient(90deg, rgba(57, 255, 20, 0.18), transparent 70%);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  left: 130%;
}

.nav-index {
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--c-orange);
  letter-spacing: 0;
}

.nav-text {
  position: relative;
}

.header-meta {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.header-tagline {
  font-size: 13px;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.62);
}

.header-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.46);
}

.hint-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 0 3px rgba(57, 255, 20, 0.25);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.rail-progress {
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 0;
  background: linear-gradient(180deg, var(--c-green), var(--c-orange));
  z-index: 5;
}

.rail-note {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.4);
}

.rail-coord {
  white-space: nowrap;
}

/* ===== Buttons ===== */
.btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  border: 2px solid var(--c-green);
  background: var(--c-green);
  color: var(--c-navy);
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn::after {
  content: "";
  position: absolute;
  left: -70%;
  top: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  transform: skewX(-12deg);
  pointer-events: none;
  transition: left 0.35s ease;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(10, 31, 68, 0.16);
}

.btn:hover::after {
  left: 130%;
}

.btn--primary {
  background: var(--c-green);
  border-color: var(--c-green);
  color: var(--c-navy);
}

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

.btn--ghost::after {
  background: linear-gradient(90deg, transparent, rgba(57, 255, 20, 0.25), transparent);
}

.btn--ghost:hover {
  background: rgba(57, 255, 20, 0.12);
}

.btn--dark {
  background: var(--c-navy);
  border-color: var(--c-navy);
  color: #fff;
}

.btn--dark:hover {
  box-shadow: 6px 6px 0 rgba(57, 255, 20, 0.4);
}

.btn--login {
  width: 100%;
}

/* ===== Footer ===== */
.site-footer {
  position: relative;
  background-color: var(--c-navy);
  background-image:
    linear-gradient(rgba(200, 210, 230, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 210, 230, 0.05) 1px, transparent 1px);
  background-size: 32px 32px, 32px 32px;
  color: #fff;
  padding: 64px var(--pad) 28px;
  border-top: 4px solid var(--c-green);
  overflow: hidden;
}

.footer-deco {
  position: absolute;
  right: -30px;
  bottom: -30px;
  font-family: var(--font-display);
  font-size: clamp(90px, 16vw, 220px);
  line-height: 1;
  letter-spacing: 6px;
  color: rgba(255, 255, 255, 0.045);
  pointer-events: none;
  user-select: none;
}

.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 28px;
  max-width: var(--container-w);
  margin-inline: auto;
}

.footer-brand {
  grid-column: span 4;
}

.footer-col {
  grid-column: span 2;
}

.footer-contact {
  grid-column: span 4;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 36px;
  line-height: 1;
  letter-spacing: 2px;
}

.footer-logo-en {
  display: block;
  margin-top: 4px;
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 4px;
  color: var(--c-orange);
  text-transform: uppercase;
}

.footer-tagline {
  margin: 12px 0 18px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.68);
}

.trust-statement {
  font-size: 13px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.45);
  max-width: 38em;
}

.trust-statement a {
  color: var(--c-green);
  border-bottom: 1px solid rgba(57, 255, 20, 0.4);
}

.footer-heading {
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--c-green);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 15px;
}

.footer-links li {
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.76);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  color: var(--c-orange);
  padding-left: 6px;
}

.footer-bottom {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 22px;
  margin-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  max-width: var(--container-w);
  margin-inline: auto;
}

.footer-copy {
  margin: 0;
}

.footer-icp {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--font-num);
  letter-spacing: 1px;
}

.footer-note {
  margin: 0;
  max-width: 48ch;
}

/* ===== Layout Building Blocks ===== */
.container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section {
  padding: clamp(52px, 8vw, 96px) 0;
}

.section--light {
  background: var(--c-light);
}

.section--dark {
  background: var(--c-navy);
  color: #fff;
}

.chapter {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--pad);
  margin-bottom: clamp(32px, 5vw, 56px);
}

.chapter-index {
  display: block;
  font-family: var(--font-num);
  font-size: 15px;
  letter-spacing: 2px;
  color: var(--c-orange);
  margin-bottom: 8px;
}

.chapter-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 6vw, 64px);
  line-height: 0.95;
  letter-spacing: 1px;
}

.kicker {
  display: block;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--c-orange);
  margin-bottom: 14px;
}

.lead {
  font-size: 17px;
  line-height: 1.75;
  color: var(--c-muted);
  max-width: 66ch;
}

.text-display {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.5vw, 52px);
  line-height: 1;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--c-muted);
  margin-bottom: 28px;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--c-line);
}

.breadcrumb li a {
  color: var(--c-blue);
}

.breadcrumb li a:hover {
  text-decoration: underline;
}

/* ===== Data / Media Components ===== */
.data-panel {
  background: var(--c-navy);
  color: #fff;
  padding: 26px;
  border: 2px solid var(--c-green);
  box-shadow: var(--shadow-hard);
}

.data-num {
  font-family: var(--font-num);
  font-size: clamp(52px, 7vw, 84px);
  line-height: 0.9;
  color: var(--c-orange);
  display: block;
}

.data-label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.75);
  text-transform: uppercase;
}

.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--c-line);
  background-color: var(--c-light);
  background-image:
    linear-gradient(45deg, rgba(10, 31, 68, 0.05) 25%, transparent 25%, transparent 75%, rgba(10, 31, 68, 0.05) 75%),
    linear-gradient(45deg, rgba(10, 31, 68, 0.05) 25%, transparent 25%, transparent 75%, rgba(10, 31, 68, 0.05) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 12px 12px;
  aspect-ratio: 16 / 9;
}

.media-frame--16\/9 {
  aspect-ratio: 16 / 9;
}

.media-frame--4\/3 {
  aspect-ratio: 4 / 3;
}

.media-frame--1\/1 {
  aspect-ratio: 1 / 1;
}

.media-frame--dark {
  border-color: var(--c-navy);
}

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

.slash-deco {
  width: 64px;
  height: 10px;
  margin: 14px 0;
  background: linear-gradient(100deg, var(--c-orange) 0 42%, transparent 42%);
  transform: skewX(-12deg);
}

/* ===== Reveal on Scroll ===== */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

body.nav-locked {
  overflow: hidden;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  body {
    margin-left: 0;
    padding-top: 68px;
  }

  .site-header {
    width: 100%;
    height: 68px;
    top: 0;
    bottom: auto;
    left: 0;
    right: 0;
    border-right: 0;
    border-bottom: 3px solid var(--c-green);
    padding: 0 16px;
    align-items: center;
  }

  .header-frame {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: auto;
    padding: 0;
    overflow: visible;
  }

  .brand {
    flex-direction: row;
    align-items: baseline;
    gap: 10px;
    padding: 0;
    margin: 0;
    border: 0;
  }

  .brand-mark {
    font-size: 24px;
  }

  .brand-en {
    font-size: 12px;
    letter-spacing: 3px;
  }

  .nav-toggle {
    position: relative;
    z-index: 120;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 8px;
  }

  .nav-toggle-line {
    position: relative;
    width: 24px;
    height: 2px;
    background: var(--c-green);
    transition: background 0.2s ease;
  }

  .nav-toggle-line::before,
  .nav-toggle-line::after {
    content: "";
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--c-green);
    transition: transform 0.2s ease, top 0.2s ease;
  }

  .nav-toggle-line::before {
    top: -7px;
  }

  .nav-toggle-line::after {
    top: 7px;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line {
    background: transparent;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line::before {
    top: 0;
    transform: rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line::after {
    top: 0;
    transform: rotate(-45deg);
  }

  .nav-toggle-text {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.65);
  }

  .site-nav {
    display: none;
    position: fixed;
    inset: 68px 0 0;
    z-index: 115;
    background: var(--c-navy);
    padding: 24px 20px 148px;
    overflow-y: auto;
  }

  .site-nav[data-open] {
    display: flex;
  }

  .nav-list {
    gap: 4px;
  }

  .nav-link {
    font-size: 24px;
    padding: 13px 14px;
    border-left-width: 4px;
  }

  .header-meta {
    display: none;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 120;
    background: var(--c-navy);
    border-top: 1px solid rgba(255, 255, 255, 0.18);
    padding: 14px 20px 22px;
  }

  .is-nav-open .header-meta {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .header-hint {
    justify-content: center;
  }

  .rail-note {
    display: none;
  }

  .rail-progress {
    width: 0;
    height: 3px;
    top: auto;
    bottom: -3px;
    left: 0;
    background: linear-gradient(90deg, var(--c-green), var(--c-orange));
  }

  .footer-grid {
    gap: 20px;
  }

  .footer-brand {
    grid-column: span 6;
  }

  .footer-col {
    grid-column: span 3;
  }

  .footer-contact {
    grid-column: span 6;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-brand,
  .footer-col,
  .footer-contact {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    margin-top: 32px;
  }

  .data-panel {
    padding: 20px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .skip-link {
    transform: translateY(-180%);
  }

  .skip-link:focus-visible {
    transform: translateY(0);
  }

  .hint-dot {
    animation: none;
  }

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