/* ========== 乐鱼平台 Site Kit 共享样式 /assets/site.css ========== */

/* ---------- 1. Reset & Variables ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

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

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

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

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

:root {
  --deep-sea: #0B1E2A;
  --deep-sea-light: #1A3B4F;
  --neon-green: #00FFB2;
  --warm-orange: #FF8A00;
  --foam: #E6F2F2;
  --ink: #111827;
  --white: #FFFFFF;
  --cold-gray: #94A3B8;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;
  --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-number: 'DIN Alternate', 'Roboto Mono', monospace;
  --container: 1200px;
  --shadow-card: 0 10px 30px rgba(11, 30, 42, 0.08);
  --shadow-float: 0 16px 40px rgba(0, 0, 0, 0.35);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 2. Base Typography ---------- */
body {
  font-family: var(--font-body);
  background: var(--foam);
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.25;
  color: var(--ink);
}

p {
  margin-bottom: 1rem;
}

a {
  transition: color 0.2s ease;
}

:focus-visible {
  outline: 3px solid var(--warm-orange);
  outline-offset: 3px;
  border-radius: 4px;
}

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

/* ---------- 3. Container & Section ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

.section--tight {
  padding: clamp(2rem, 4vw, 3rem) 0;
}

#main-content {
  min-height: 60vh;
}

/* ---------- 4. Typography Components ---------- */
.section-heading {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--deep-sea);
  transform: skewX(-2deg);
  margin-bottom: 0.75rem;
}

.section-heading--light {
  color: var(--foam);
}

.section-heading .hl {
  font-family: var(--font-number);
  color: var(--warm-orange);
}

.section-index {
  display: block;
  font-family: var(--font-number);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cold-gray);
  margin-bottom: 0.4rem;
}

.section-sub {
  font-size: 1rem;
  color: var(--cold-gray);
  max-width: 56ch;
  margin-bottom: 2rem;
}

.lead {
  font-size: 1.125rem;
  line-height: 1.75;
  color: #334155;
  max-width: 60ch;
}

.lead--light {
  color: rgba(230, 242, 242, 0.8);
}

.data-number {
  font-family: var(--font-number);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--deep-sea);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.data-number--accent {
  color: var(--warm-orange);
}

.data-number--light {
  color: var(--neon-green);
}

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.2;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--neon-green);
  color: var(--deep-sea);
  border-color: var(--neon-green);
}

.btn-primary:hover {
  background: transparent;
  color: var(--neon-green);
  box-shadow: 0 0 0 1px var(--neon-green) inset;
}

.btn-accent {
  background: var(--warm-orange);
  color: var(--deep-sea);
  border-color: var(--warm-orange);
}

.btn-accent:hover {
  background: transparent;
  color: var(--warm-orange);
  box-shadow: 0 0 0 1px var(--warm-orange) inset;
}

.btn:focus-visible {
  outline: 3px solid var(--warm-orange);
  outline-offset: 3px;
}

/* ---------- 6. Breadcrumb ---------- */
.breadcrumb {
  padding: 0.5rem 0;
  font-size: 0.85rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: '/';
  margin-right: 0.4rem;
  color: var(--cold-gray);
}

.breadcrumb a {
  color: var(--deep-sea);
  font-weight: 500;
}

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

.breadcrumb [aria-current="page"] {
  color: var(--cold-gray);
  font-weight: 600;
}

.breadcrumb--light a {
  color: var(--neon-green);
}

.breadcrumb--light [aria-current="page"] {
  color: var(--foam);
}

/* ---------- 7. Cards & Tags ---------- */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 2.5vw, 2rem);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.card--dark {
  background: linear-gradient(145deg, var(--deep-sea), var(--deep-sea-light));
  color: var(--foam);
}

.card--dark h1,
.card--dark h2,
.card--dark h3,
.card--dark h4,
.card--dark h5,
.card--dark h6 {
  color: var(--foam);
}

.card--accent {
  background: linear-gradient(135deg, var(--warm-orange), #FFB347);
  color: var(--deep-sea);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.9rem;
  background: rgba(0, 255, 178, 0.12);
  color: var(--deep-sea);
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.tag--accent {
  background: rgba(255, 138, 0, 0.14);
  color: var(--warm-orange);
}

.tag--dark {
  background: rgba(0, 255, 178, 0.14);
  color: var(--neon-green);
}

/* ---------- 8. Grid ---------- */
.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* ---------- 9. Stat / Media Frame ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cold-gray);
}

.stat-value {
  font-family: var(--font-number);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--deep-sea);
  font-variant-numeric: tabular-nums;
}

.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 72% 22%, rgba(0, 255, 178, 0.18), transparent 50%),
    linear-gradient(145deg, var(--deep-sea-light), var(--deep-sea));
  aspect-ratio: 16 / 9;
}

.media-frame::after {
  content: 'IMAGE';
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-number);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  color: rgba(230, 242, 242, 0.35);
  pointer-events: none;
}

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

.media-frame--portrait {
  aspect-ratio: 4 / 5;
}

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

/* ---------- 10. Reveal Motion ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.65s var(--ease),
    transform 0.65s var(--ease);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}

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

html.js [data-reveal-group] [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.65s var(--ease),
    transform 0.65s var(--ease);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}

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

/* ---------- 11. Scroll Progress ---------- */
[data-scroll-progress] {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--neon-green), var(--warm-orange));
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 300;
  pointer-events: none;
}

/* ---------- 12. Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.4rem;
  background: var(--warm-orange);
  color: var(--deep-sea);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  box-shadow: var(--shadow-float);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

/* ---------- 13. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: linear-gradient(180deg, #102936 0%, var(--deep-sea) 100%);
  color: var(--foam);
  box-shadow:
    0 1px 0 rgba(0, 255, 178, 0.08),
    0 8px 32px rgba(0, 0, 0, 0.16);
}

.masthead {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 1.5rem 0.75rem;
}

.masthead-edition {
  justify-self: start;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--cold-gray);
  margin: 0;
}

.masthead-status {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--cold-gray);
  margin: 0;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 0 0 rgba(0, 255, 178, 0.5);
  animation: status-pulse 2s infinite;
}

@keyframes status-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 255, 178, 0.5);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(0, 255, 178, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 255, 178, 0);
  }
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  border-radius: var(--radius-lg);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-mark {
  position: relative;
  display: inline-block;
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: linear-gradient(145deg, var(--deep-sea-light) 0%, var(--deep-sea) 60%);
  border: 1px solid rgba(0, 255, 178, 0.45);
  box-shadow:
    inset 0 0 12px rgba(0, 255, 178, 0.08),
    0 4px 14px rgba(0, 0, 0, 0.25);
  transform: skewX(-2deg);
}

.brand-mark::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 9px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 12px rgba(0, 255, 178, 0.65);
  transform: translateY(-50%);
}

.brand-mark::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 6px;
  width: 0;
  height: 0;
  border-left: 9px solid var(--warm-orange);
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  transform: translateY(-50%);
}

.brand-mark--sm {
  width: 34px;
  height: 34px;
  border-radius: 10px;
}

.brand-mark--sm::before {
  left: 7px;
  width: 11px;
  height: 11px;
}

.brand-mark--sm::after {
  right: 5px;
  border-left-width: 6px;
  border-top-width: 4px;
  border-bottom-width: 4px;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--white);
  transform: skewX(-2deg);
}

.brand-domain {
  font-family: var(--font-number);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cold-gray);
}

.nav-shell {
  background: rgba(26, 59, 79, 0.5);
  border-top: 1px solid rgba(0, 255, 178, 0.12);
}

.nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0.65rem 1.5rem;
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: rgba(230, 242, 242, 0.9);
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover {
  color: var(--neon-green);
  background: rgba(0, 255, 178, 0.08);
}

.nav-link[aria-current="page"] {
  color: var(--neon-green);
  background: rgba(0, 255, 178, 0.12);
}

.nav-cta {
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 42px;
  height: 42px;
  padding: 0;
  background: rgba(230, 242, 242, 0.06);
  border: 1px solid rgba(230, 242, 242, 0.14);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.nav-toggle:hover {
  background: rgba(230, 242, 242, 0.12);
  border-color: rgba(0, 255, 178, 0.5);
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--neon-green);
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- 14. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: 3rem;
  color: var(--foam);
  background:
    radial-gradient(ellipse at 12% 100%, rgba(0, 255, 178, 0.1), transparent 50%),
    radial-gradient(ellipse at 88% 0%, rgba(255, 138, 0, 0.07), transparent 40%),
    linear-gradient(180deg, var(--deep-sea) 0%, #07141D 100%);
  border-top: 2px solid rgba(0, 255, 178, 0.25);
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 255, 178, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 178, 0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.site-footer a {
  color: inherit;
}

.footer-main {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.9fr 1.3fr;
  gap: 2.5rem;
  padding-top: 3.5rem;
  padding-bottom: 3rem;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.8rem;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--white);
  transform: skewX(-2deg);
}

.footer-tagline {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--neon-green);
  margin-bottom: 0.85rem;
}

.footer-trust {
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--cold-gray);
  max-width: 30ch;
  margin: 0;
}

.footer-heading {
  position: relative;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--neon-green);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
}

.footer-heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--warm-orange);
  border-radius: 2px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: rgba(230, 242, 242, 0.82);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  color: var(--neon-green);
  padding-left: 4px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: rgba(230, 242, 242, 0.82);
}

.contact-note {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--cold-gray);
  border-left: 2px solid var(--warm-orange);
  padding-left: 0.75rem;
}

.footer-bottom {
  position: relative;
  border-top: 1px solid rgba(230, 242, 242, 0.08);
  padding: 1.25rem 0;
  font-size: 0.8rem;
  color: var(--cold-gray);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.footer-icp {
  font-family: var(--font-number);
  letter-spacing: 0.04em;
}

/* ---------- 15. Responsive ---------- */
@media (max-width: 1024px) {
  .masthead {
    gap: 1rem;
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .site-header {
    position: relative;
  }

  .nav-inner {
    justify-content: space-between;
    gap: 1rem;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
  }

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

  .nav-cta {
    position: static;
    transform: none;
    padding: 0.55rem 1.1rem;
    font-size: 0.88rem;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 1rem;
    right: 1rem;
    z-index: 120;
    background: var(--deep-sea-light);
    border: 1px solid rgba(0, 255, 178, 0.16);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-float);
    padding: 0.75rem;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }

  .site-nav[data-open] {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: 0.7rem 1rem;
  }

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

@media (max-width: 640px) {
  .masthead {
    display: flex;
    justify-content: center;
    padding: 1rem 1rem 0.5rem;
  }

  .masthead-edition,
  .masthead-status {
    display: none;
  }

  .brand-name {
    font-size: 1.25rem;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 11px;
  }

  .brand-mark::before {
    left: 7px;
    width: 12px;
    height: 12px;
  }

  .brand-mark::after {
    right: 5px;
    border-left-width: 7px;
    border-top-width: 5px;
    border-bottom-width: 5px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-top: 2.5rem;
    padding-bottom: 2rem;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

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

  .btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
  }
}

/* ---------- 16. Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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

  .status-dot {
    animation: none;
  }

  [data-scroll-progress] {
    display: none;
  }

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