/* ========== Reset & Base ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  background: var(--bg-deep);
  color: var(--text-pure);
  min-height: 100vh;
  overflow-x: hidden;
}

ul {
  list-style: none;
}

a {
  color: var(--electric-blue);
  text-decoration: none;
}

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

input, button {
  font: inherit;
}

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

:focus-visible {
  outline: 3px solid var(--neon-green);
  outline-offset: 2px;
  border-radius: 4px;
}

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

/* ========== CSS Variables ========== */
:root {
  --bg-deep: #0A0E1A;
  --bg-panel: #121A2B;
  --bg-elevated: #1A2438;
  --neon-green: #B6FF2E;
  --electric-blue: #00E5FF;
  --warm-orange: #FF8A00;
  --text-pure: #F2F5FF;
  --text-muted: #8B96AD;
  --grid-line: rgba(0, 229, 255, 0.12);
  --glow-success: rgba(182, 255, 46, 0.25);
  --font-display: 'Rajdhani', 'DIN Alternate', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-numeric: 'Roboto Mono', 'JetBrains Mono', Consolas, monospace;
  --header-h: 64px;
  --rail-w: 270px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --transition: 0.25s ease;
  --content-max: 1400px;
}

/* ========== Utilities ========== */
.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;
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 4000;
  padding: 10px 20px;
  background: var(--neon-green);
  color: #0A0E1A;
  font-weight: 700;
  border-radius: 999px;
  transition: top 0.25s ease;
}

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

/* ========== Layout ========== */
.container {
  width: min(100% - 48px, var(--content-max));
  margin: 0 auto;
}

.content-body {
  min-height: 70vh;
  padding: calc(var(--header-h) + 40px) clamp(20px, 4vw, 48px) 72px;
}

/* ========== Buttons & Common Components ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background 0.25s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--neon-green);
  color: #0A0E1A;
}

.btn-primary:hover {
  background: #c8ff5e;
  box-shadow: 0 0 28px var(--glow-success);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  border-color: var(--electric-blue);
  color: var(--electric-blue);
}

.btn-ghost:hover {
  background: rgba(0, 229, 255, 0.1);
  transform: translateY(-1px);
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-family: var(--font-numeric);
  color: var(--electric-blue);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.2);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--neon-green);
}

.section-label::before {
  content: "";
  width: 20px;
  height: 2px;
  background: var(--neon-green);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

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

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.media-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--grid-line);
  aspect-ratio: 16 / 9;
}

.media-frame::before {
  content: attr(data-label);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-family: var(--font-numeric);
  font-size: 14px;
  letter-spacing: 1px;
}

/* ========== Scroll Progress ========== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  z-index: 3000;
  background: linear-gradient(90deg, var(--neon-green), var(--electric-blue));
  pointer-events: none;
}

/* ========== Header Top ========== */
.header-top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 500;
  background: rgba(10, 14, 26, 0.88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--grid-line);
}

.header-top::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, var(--neon-green) 0%, transparent 30%, transparent 70%, var(--electric-blue) 100%);
  opacity: 0.45;
}

.header-inner {
  height: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 32px);
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-logo {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1;
  color: var(--neon-green);
  background: var(--bg-panel);
  border: 1px solid var(--grid-line);
  border-radius: 10px;
  padding: 6px 10px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-pure);
}

.brand-sub {
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(182, 255, 46, 0.06);
  border: 1px solid rgba(182, 255, 46, 0.25);
  color: var(--neon-green);
  font-family: var(--font-numeric);
  font-size: 13px;
  white-space: nowrap;
}

.live-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 0 0 var(--glow-success);
  animation: livePulse 2s ease-out infinite;
}

@keyframes livePulse {
  0% { box-shadow: 0 0 0 0 var(--glow-success); }
  70% { box-shadow: 0 0 0 10px rgba(182, 255, 46, 0); }
  100% { box-shadow: 0 0 0 0 rgba(182, 255, 46, 0); }
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-panel);
  border: 1px solid var(--grid-line);
  border-radius: 999px;
  padding: 7px 14px;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.search-box:focus-within {
  border-color: var(--electric-blue);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.12);
}

.search-icon {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.search-input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-pure);
  font-size: 14px;
  width: 120px;
}

.search-input::placeholder {
  color: var(--text-muted);
  opacity: 0.8;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 42px;
  height: 42px;
  gap: 5px;
  border-radius: 12px;
  background: var(--bg-panel);
  border: 1px solid var(--grid-line);
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-pure);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

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

/* ========== Side Rail ========== */
.site-header {
  position: relative;
}

.side-rail {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--rail-w);
  height: 100vh;
  height: 100dvh;
  z-index: 600;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-panel);
  background-image: linear-gradient(rgba(0, 229, 255, 0.045) 1px, transparent 1px);
  background-size: 100% 40px;
  border-right: 1px solid var(--grid-line);
  transform: translateX(-100%);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.side-rail[data-open="true"] {
  transform: translateX(0);
  box-shadow: 24px 0 64px rgba(0, 0, 0, 0.5);
}

.rail-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--grid-line);
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  color: var(--neon-green);
  line-height: 1;
  letter-spacing: -0.5px;
}

.rail-caption {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.rail-nav {
  flex: 1;
  padding: 16px 0;
  position: relative;
}

.rail-nav::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 56px;
  width: 1px;
  background: var(--grid-line);
}

.rail-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--text-muted);
  border-left: 2px solid transparent;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}

.rail-link:hover {
  color: var(--text-pure);
  background: rgba(0, 229, 255, 0.04);
}

.rail-link[aria-current="page"] {
  color: var(--neon-green);
  border-left-color: var(--neon-green);
  background: linear-gradient(90deg, rgba(182, 255, 46, 0.07), transparent 80%);
}

.rail-num {
  font-family: var(--font-numeric);
  font-size: 12px;
  color: var(--text-muted);
  width: 20px;
  text-align: right;
  opacity: 0.8;
}

.rail-link[aria-current="page"] .rail-num {
  color: var(--neon-green);
}

.rail-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  opacity: 0.5;
  flex-shrink: 0;
  transition: all 0.25s;
}

.rail-link[aria-current="page"] .rail-dot {
  background: var(--neon-green);
  box-shadow: 0 0 10px var(--neon-green);
  opacity: 1;
}

.rail-txt {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.rail-foot {
  padding: 16px 16px 20px;
  border-top: 1px solid var(--grid-line);
}

.rail-score-card {
  background: var(--bg-elevated);
  border: 1px solid var(--grid-line);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 12px;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.rail-score-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-green));
}

.score-label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.score-line {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-numeric);
  font-size: 15px;
  color: var(--text-pure);
}

.score-line b {
  color: var(--neon-green);
  font-weight: 700;
}

.score-line i {
  font-style: normal;
  color: var(--text-muted);
}

.score-time {
  display: block;
  font-size: 12px;
  color: var(--warm-orange);
  margin-top: 6px;
  font-family: var(--font-numeric);
}

.rail-hotline {
  display: block;
  text-align: center;
  font-family: var(--font-numeric);
  font-size: 14px;
  color: var(--electric-blue);
  padding: 10px;
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 999px;
  transition: background 0.25s;
}

.rail-hotline:hover {
  background: rgba(0, 229, 255, 0.08);
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 550;
  background: rgba(4, 6, 12, 0.65);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.nav-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* ========== Footer ========== */
.site-footer {
  position: relative;
  background: var(--bg-panel);
  border-top: 1px solid var(--grid-line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-green), var(--electric-blue), transparent 80%);
}

.footer-zone {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 56px clamp(20px, 4vw, 48px) 24px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px 40px;
}

.footer-brand-col {
  min-width: 0;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  color: var(--neon-green);
  background: var(--bg-deep);
  padding: 6px 12px;
  border-radius: 10px;
  border: 1px solid var(--grid-line);
  line-height: 1;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-pure);
  line-height: 1.1;
}

.footer-brand-name span {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 1px;
}

.footer-trust {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 340px;
}

.footer-col {
  min-width: 0;
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-pure);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--grid-line);
}

.footer-list li + li {
  margin-top: 10px;
}

.footer-list a {
  color: var(--text-muted);
  font-size: 14px;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-list a:hover {
  color: var(--electric-blue);
  padding-left: 4px;
}

.footer-contact-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(0, 229, 255, 0.06);
}

.contact-label {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.contact-value {
  font-size: 14px;
  color: var(--text-pure);
  font-family: var(--font-body);
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--grid-line);
}

.footer-legal-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-legal-links a:hover {
  color: var(--neon-green);
}

.legal-divider {
  color: var(--text-muted);
  opacity: 0.5;
  font-size: 12px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--grid-line);
  font-size: 13px;
  color: var(--text-muted);
}

.copyright {
  font-family: var(--font-numeric);
}

.icp {
  font-family: var(--font-numeric);
}

.footer-hint {
  color: var(--text-muted);
  font-size: 13px;
}

/* ========== Media Queries ========== */
@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .search-box,
  .live-indicator {
    display: none;
  }

  .brand-sub {
    display: none;
  }
}

@media (min-width: 768px) {
  .container {
    width: min(100% - 64px, var(--content-max));
  }
}

@media (min-width: 1024px) {
  body {
    padding-left: var(--rail-w);
  }

  .header-top {
    left: var(--rail-w);
    right: 0;
  }

  .side-rail {
    transform: none;
    box-shadow: none;
  }

  .side-rail[data-open="true"] {
    box-shadow: none;
  }

  .nav-toggle,
  .nav-backdrop {
    display: none;
  }

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

  .footer-top-grid {
    grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  }
}

/* ========== Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .live-pulse {
    animation: none;
  }
}