/* ==========================================================
   LEYU 乐鱼 | Shared Site Stylesheet
   File: /assets/site.css
   ========================================================== */

/* ---------- 01. Tokens ---------- */
:root {
  --primary-deep-blue: #0A1F44;
  --accent-orange: #FF6B35;
  --gold-accent: #FFD700;
  --off-white: #F5F6F8;
  --text-dark: #1F2937;
  --text-light: #FFFFFF;
  --border-line: #D1D5DB;
  --muted-gray: #6B7280;
  --data-success: #10B981;
  --warning-red: #EF4444;

  --heading-font: 'Noto Sans SC', 'Impact', 'Arial Black', sans-serif;
  --body-font: 'Roboto', 'Noto Sans SC', sans-serif;
  --data-font: 'Roboto Mono', monospace;

  --content-max: 1440px;
  --status-bar-h: 32px;
  --header-main-h: 88px;
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 02. Reset ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-main-h) + 16px);
}

body {
  font-family: var(--body-font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dark);
  background: var(--off-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.nav-open {
  overflow: hidden;
}

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

ul, ol {
  list-style: none;
}

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

a {
  color: var(--primary-deep-blue);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

::selection {
  background: var(--accent-orange);
  color: var(--text-light);
}

/* ---------- 03. Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--heading-font);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-dark);
  margin: 0 0 16px;
}

h1 { font-size: clamp(40px, 6vw, 64px); }
h2 { font-size: clamp(28px, 4vw, 40px); }
h3 { font-size: clamp(20px, 2.5vw, 28px); }
h4 { font-size: 20px; }

p {
  margin-bottom: 1em;
}

/* ---------- 04. Layout ---------- */
.site-main {
  min-height: 60vh;
  background: var(--off-white);
  outline: none;
}

#main-content:focus {
  outline: none;
}

.site-container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 40px;
}

.section {
  padding: 88px 0;
  position: relative;
}

.section-dark {
  background: var(--primary-deep-blue);
  color: var(--text-light);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--text-light);
}

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

.section-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  max-width: 720px;
  margin-bottom: 40px;
}

.section-number {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--data-font);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--accent-orange);
  margin-bottom: 12px;
}

.section-number::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--gold-accent);
  flex: none;
}

.section-title {
  font-family: var(--heading-font);
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-dark .section-title {
  color: var(--text-light);
}

.section-lead {
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted-gray);
  max-width: 620px;
}

.section-dark .section-lead {
  color: rgba(255, 255, 255, 0.7);
}

.content {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px;
}

.content-title {
  font-family: var(--heading-font);
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-deep-blue);
  margin-bottom: 16px;
}

.content-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-dark);
}

.divider {
  height: 1px;
  background: var(--border-line);
  border: 0;
  margin: 48px 0;
}

/* ---------- 05. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--body-font);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  text-decoration: none;
  text-align: center;
  border: 2px solid currentColor;
  border-radius: 0;
  cursor: pointer;
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.btn-primary {
  background: var(--accent-orange);
  border-color: var(--accent-orange);
  color: var(--text-light);
}

.btn-primary:hover {
  background: transparent;
  color: var(--accent-orange);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--text-light);
}

.btn-outline:hover {
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

.btn-dark {
  background: var(--primary-deep-blue);
  border-color: var(--primary-deep-blue);
  color: var(--text-light);
}

.btn-dark:hover {
  background: transparent;
  color: var(--primary-deep-blue);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

/* ---------- 06. Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 20px 0;
  font-family: var(--data-font);
  font-size: 13px;
  color: var(--muted-gray);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb-item a {
  color: var(--primary-deep-blue);
  text-decoration: none;
  transition: color 0.2s;
}

.breadcrumb-item a:hover {
  color: var(--accent-orange);
}

.breadcrumb-sep {
  color: var(--border-line);
  user-select: none;
}

/* ---------- 07. Grid ---------- */
.grid {
  display: grid;
  gap: 32px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ---------- 08. Card ---------- */
.card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px 24px;
  background: var(--text-light);
  border: 1px solid var(--border-line);
  border-radius: 0;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.card:hover {
  border-color: var(--primary-deep-blue);
  box-shadow: 8px 8px 0 rgba(10, 31, 68, 0.08);
}

.card-number {
  font-family: var(--data-font);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
  text-transform: uppercase;
}

.card-title {
  font-family: var(--heading-font);
  font-size: 18px;
  font-weight: 800;
  color: var(--primary-deep-blue);
  margin: 0;
}

.card-body {
  font-size: 14px;
  color: var(--muted-gray);
  line-height: 1.7;
}

/* ---------- 09. Data Badge & Exhibit Label ---------- */
.data-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--data-font);
  font-size: 12px;
  font-weight: 500;
  border: 1px solid var(--border-line);
  border-radius: 0;
  background: var(--text-light);
  color: var(--text-dark);
}

.data-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  background: currentColor;
  flex: none;
}

.data-badge--orange {
  border-color: var(--accent-orange);
  color: var(--accent-orange);
  background: rgba(255, 107, 53, 0.05);
}

.data-badge--green {
  border-color: var(--data-success);
  color: var(--data-success);
  background: rgba(16, 185, 129, 0.05);
}

.data-badge--red {
  border-color: var(--warning-red);
  color: var(--warning-red);
  background: rgba(239, 68, 68, 0.05);
}

.data-badge--gold {
  border-color: var(--gold-accent);
  color: #B45309;
  background: rgba(255, 215, 0, 0.05);
}

.exhibit-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px 6px 14px;
  font-family: var(--data-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--text-light);
  background: var(--primary-deep-blue);
  border-left: 4px solid var(--accent-orange);
  white-space: nowrap;
}

/* ---------- 10. Image Frame ---------- */
.image-frame {
  position: relative;
  overflow: hidden;
  background: var(--primary-deep-blue);
  border: 1px solid var(--border-line);
}

.image-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.image-frame--wide::before {
  padding-top: 41.667%;
}

.image-frame--square::before {
  padding-top: 100%;
}

.image-frame--portrait::before {
  padding-top: 125%;
}

.image-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame--grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(10, 31, 68, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 31, 68, 0.22) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

/* ---------- 11. Header ---------- */
.site-header {
  position: sticky;
  top: calc(-1 * var(--status-bar-h));
  z-index: 1000;
  background: var(--primary-deep-blue);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header a {
  text-decoration: none;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 2000;
  padding: 10px 20px;
  background: var(--accent-orange);
  color: var(--text-light);
  font-family: var(--body-font);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s var(--ease-out);
}

.skip-link:focus {
  top: 8px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--gold-accent);
  z-index: 2100;
  pointer-events: none;
}

.header-status-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  height: var(--status-bar-h);
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-family: var(--data-font);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.5);
}

.status-live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--data-success);
  animation: live-pulse 2s infinite;
}

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

.status-text {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.65);
}

.status-divider {
  color: rgba(255, 255, 255, 0.25);
}

.status-matchday {
  color: var(--gold-accent);
  letter-spacing: 0.12em;
}

.status-spacer {
  flex: 1;
}

.status-cards {
  display: inline-flex;
  gap: 5px;
}

.status-card-chip {
  display: inline-block;
  width: 12px;
  height: 16px;
  border-radius: 2px;
}

.status-card-chip--red {
  background: var(--warning-red);
}

.status-card-chip--gold {
  background: var(--gold-accent);
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--header-main-h);
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 40px;
}

.brand-block {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding-left: 18px;
  color: var(--text-light);
  line-height: 1.15;
}

.brand-block::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 4px;
  background: var(--accent-orange);
}

.brand-mark {
  font-family: var(--heading-font);
  font-weight: 900;
  font-size: 26px;
  letter-spacing: 0.01em;
  color: var(--text-light);
  line-height: 1.1;
}

.brand-name {
  font-family: var(--heading-font);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.18em;
  color: var(--gold-accent);
  line-height: 1.15;
}

.brand-tag {
  font-family: var(--data-font);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 4px;
  text-transform: uppercase;
}

.site-nav .nav-list {
  display: flex;
  align-items: stretch;
  gap: 2px;
  height: var(--header-main-h);
}

.nav-item {
  display: flex;
  align-items: stretch;
}

.nav-link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 0 16px;
  min-width: 64px;
  color: rgba(255, 255, 255, 0.75);
  transition: color 0.2s var(--ease-out);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 16px;
  right: 16px;
  height: 3px;
  background: var(--accent-orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s var(--ease-out);
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--text-light);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] .nav-label {
  color: var(--accent-orange);
}

.nav-index {
  font-family: var(--data-font);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--gold-accent);
  line-height: 1;
}

.nav-label {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  line-height: 1.2;
  color: inherit;
  transition: color 0.2s;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 52px;
  height: 52px;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: transparent;
  cursor: pointer;
}

.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-light);
  pointer-events: none;
  transition: transform 0.3s var(--ease-out), opacity 0.2s;
}

.nav-toggle-text {
  font-family: var(--data-font);
  font-size: 9px;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.6);
  pointer-events: none;
}

/* ---------- 12. Footer ---------- */
.site-footer {
  background: var(--primary-deep-blue);
  color: var(--text-light);
  border-top: 4px solid var(--accent-orange);
}

.site-footer a {
  text-decoration: none;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1.4fr;
  gap: 48px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 64px 40px 40px;
}

.footer-brand-mark {
  display: block;
  font-family: var(--heading-font);
  font-weight: 900;
  font-size: 28px;
  letter-spacing: -0.01em;
  color: var(--text-light);
  line-height: 1.1;
}

.footer-brand-mark::after {
  content: "";
  display: block;
  width: 36px;
  height: 3px;
  background: var(--accent-orange);
  margin-top: 12px;
}

.footer-trust {
  margin-top: 16px;
  max-width: 420px;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
}

.footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.footer-col-title {
  display: block;
  font-family: var(--data-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-accent);
  padding-bottom: 8px;
  margin-bottom: 6px;
  border-bottom: 2px solid rgba(255, 215, 0, 0.4);
}

.footer-link {
  padding: 3px 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-link:hover {
  color: var(--accent-orange);
  padding-left: 6px;
}

.footer-email {
  display: block;
  font-family: var(--data-font);
  font-size: 13px;
  letter-spacing: 0.01em;
  color: rgba(255, 255, 255, 0.6);
}

.footer-phone {
  display: block;
  font-family: var(--data-font);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.5);
}

.footer-address {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 20px 40px 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--data-font);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.footer-copy {
  color: rgba(255, 255, 255, 0.45);
}

.footer-icp {
  color: rgba(255, 255, 255, 0.35);
}

/* ---------- 13. Reveal Animation ---------- */
html.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

html.js-enabled [data-reveal="left"] {
  transform: translateX(-28px);
}

html.js-enabled [data-reveal="right"] {
  transform: translateX(28px);
}

html.js-enabled [data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: none;
}

/* ---------- 14. Focus ---------- */
:focus-visible {
  outline: 3px solid var(--accent-orange);
  outline-offset: 2px;
}

.nav-link:focus-visible,
.brand-block:focus-visible,
.footer-link:focus-visible {
  outline-color: var(--gold-accent);
}

/* ---------- 15. Responsive ---------- */
@media (max-width: 1100px) {
  .nav-link {
    padding: 0 10px;
    min-width: auto;
  }

  .nav-label {
    font-size: 13px;
  }
}

@media (max-width: 900px) {
  :root {
    --status-bar-h: 28px;
    --header-main-h: 64px;
  }

  .site-container {
    padding: 0 20px;
  }

  .section {
    padding: 56px 0;
  }

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

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

  .header-status-bar {
    padding: 0 20px;
  }

  .header-main {
    padding: 0 20px;
  }

  .brand-mark {
    font-size: 22px;
  }

  .brand-name {
    font-size: 18px;
  }

  .nav-toggle {
    display: flex;
    position: relative;
    z-index: 2;
  }

  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-deep-blue);
    padding: calc(var(--header-main-h) + 24px) 24px 48px;
    overflow-y: auto;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out), visibility 0.3s;
  }

  .site-nav[data-open="true"] {
    visibility: visible;
    opacity: 1;
    transform: none;
  }

  .nav-list {
    flex-direction: column;
    height: auto;
    gap: 0;
  }

  .nav-item {
    display: block;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-link {
    flex-direction: row;
    justify-content: flex-start;
    gap: 16px;
    padding: 20px 8px;
    height: auto;
    min-width: 0;
  }

  .nav-link::after {
    top: 50%;
    bottom: auto;
    left: 0;
    right: auto;
    width: 3px;
    height: 24px;
    transform: translateY(-50%) scaleY(0);
  }

  .nav-link:hover::after,
  .nav-link[aria-current="page"]::after {
    transform: translateY(-50%) scaleY(1);
  }

  .nav-index {
    font-size: 12px;
    min-width: 24px;
    text-align: right;
  }

  .nav-label {
    font-size: 18px;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    padding: 48px 20px 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-bottom {
    padding: 16px 20px 24px;
    justify-content: flex-start;
  }
}

@media (max-width: 600px) {
  :root {
    --status-bar-h: 26px;
  }

  .status-matchday,
  .status-divider {
    display: none;
  }

  .header-status-bar {
    gap: 8px;
  }

  .brand-tag {
    display: none;
  }

  .brand-block {
    padding-left: 14px;
  }

  .brand-block::before {
    width: 3px;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 20px 28px;
  }

  .footer-brand {
    grid-column: auto;
  }
}

/* ---------- 16. 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;
  }

  .status-live-dot {
    animation: none;
  }

  html.js-enabled [data-reveal],
  html.js-enabled [data-reveal="left"],
  html.js-enabled [data-reveal="right"],
  html.js-enabled [data-reveal][data-revealed="true"] {
    opacity: 1;
    transform: none;
  }
}