/* =============================================
   BARBOARD OFFICIAL WEBSITE — style.css
   File: /style.css
   ============================================= */

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

:root {
  /* ── Background & Surface ── */
  /* 参考 Barvision 2026 opening credits 色调：极深午夜蓝黑 */
  --clr-bg:         #080812;
  --clr-bg-2:       #0c0c18;
  --clr-bg-3:       #10101e;
  --clr-surface:    #141422;
  --clr-surface-2:  #1a1a2e;
  --clr-border:     rgba(180,160,255,0.14);
  --clr-border-2:   rgba(180,160,255,0.26);

  /* ── Primary — Electric Blue（片头蓝色线条）── */
  --clr-accent:       #00b4ff;
  --clr-accent-light: #33c6ff;
  --clr-accent-glow:  rgba(0,180,255,0.30);
  --clr-accent-dim:   rgba(0,180,255,0.12);

  /* ── Secondary — Neon Pink/Magenta（片头粉紫线条）── */
  --clr-pink:         #e040a0;
  --clr-pink-light:   #f060b8;
  --clr-pink-glow:    rgba(224,64,160,0.30);
  --clr-pink-dim:     rgba(224,64,160,0.12);

  /* ── Tertiary — Mid Violet（蓝粉之间的过渡）── */
  --clr-violet:       #a855f7;
  --clr-violet-light: #c084fc;
  --clr-violet-glow:  rgba(168,85,247,0.30);
  --clr-violet-dim:   rgba(168,85,247,0.12);

  /* ── Gold (rankings/awards) ── */
  --clr-gold:       #c8982a;
  --clr-gold-light: #e0b040;

  /* ── Text ── */
  --clr-text:       #f0eeff;
  --clr-text-2:     #8880a8;
  --clr-text-3:     #8880a8;

  /* ── Semantic aliases ── */
  --clr-red:        var(--clr-pink);
  --clr-red-light:  var(--clr-pink-light);
  --clr-red-glow:   var(--clr-pink-glow);
  --clr-red-dim:    var(--clr-pink-dim);

  /* Typography */
  --font-display: 'Bebas Neue', 'Impact', 'Arial Black', sans-serif;
  --font-body:    'DM Sans', 'Segoe UI', system-ui, sans-serif;
  --font-mono:    'DM Mono', 'Fira Code', monospace;

  /* Spacing */
  --gap-xs:  8px;
  --gap-sm:  16px;
  --gap-md:  32px;
  --gap-lg:  64px;
  --gap-xl:  96px;

  /* Layout */
  --max-width: 1200px;
  --nav-h:     72px;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

.container,
.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gap-md);
}

.tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 3px;
  border: 1px solid currentColor;
}

.tag--red {
  color: var(--clr-red-light);
  border-color: var(--clr-red-light);
}

.tag--gold {
  color: var(--clr-gold-light);
  border-color: var(--clr-gold-light);
}

.tag--dim {
  color: var(--clr-text-2);
  border-color: var(--clr-border-2);
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--clr-violet-light);
  text-shadow: 0 0 10px rgba(192,132,252,0.45);
  margin-bottom: var(--gap-sm);
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-accent) 0%, var(--clr-violet) 90%);
  flex-shrink: 0;
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--clr-border);
}

/* =============================================
   NAVIGATION
   ============================================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.3s, border-color 0.3s;
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 11, 0.92);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--clr-border);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gap-md);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}


.nav__links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav__links a {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--clr-text-2);
  transition: color 0.2s;
  position: relative;
}

.nav__links a:not(.nav__cta)::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--clr-violet-light);
  transform: scaleX(0);
  transition: transform 0.2s;
}

.nav__links a:hover {
  color: var(--clr-text);
}

.nav__links a:not(.nav__cta):hover::after {
  transform: scaleX(1);
}

.ext-icon {
  display: inline-block;
  vertical-align: middle;
  margin-left: 4px;
  margin-bottom: 1px;
  opacity: 0.6;
  flex-shrink: 0;
  transition: opacity 0.2s;
}

.nav__links a:hover .ext-icon,
.btn:hover .ext-icon {
  opacity: 1;
}

.nav__links .nav__cta {
  color: #fff;
  padding: 6px 16px 7px;
  border-radius: 4px;
  border: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  background-image: linear-gradient(
    135deg,
    var(--clr-pink-light) 0%,
    var(--clr-pink-light) 35%,
    #9840f0               60%,
    #7030c8               80%,
    #4c18a0               100%
  );
  background-size: 250% 100%;
  background-position: right center;
  box-shadow: 0 0 12px rgba(168,85,247,0.28);
  transition: background-position 0.35s ease, box-shadow 0.35s ease;
}

.nav__links .nav__cta:hover {
  background-position: left center;
  box-shadow: 0 0 20px rgba(224,64,160,0.5), 0 0 40px rgba(168,85,247,0.2);
}

.nav__cta-title {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1;
}

.nav__cta-sub {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1;
  opacity: 0.82;
}

.nav__menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--clr-text);
  padding: 4px;
}

/* =============================================
   HERO
   ============================================= */
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* Hero background logo watermark */
.hero__bg-logo {
  position: absolute;
  right: -80px;
  top: 50%;
  transform: translateY(-50%);
  width: 480px;
  height: 480px;
  object-fit: contain;
  mix-blend-mode: screen;
  opacity: 0.10;
  pointer-events: none;
  z-index: 1;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, rgba(0,0,0,0.3) 50%, rgba(0,0,0,0.75) 80%);
  mask-image: linear-gradient(to right, transparent 0%, rgba(0,0,0,0.3) 50%, rgba(0,0,0,0.75) 80%);
}


.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: 1;
}

.hero__noise {
  position: absolute;
  inset: 0;
  z-index: 3;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
}

.hero__content {
  position: relative;
  z-index: 10;
}

.hero__eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--clr-violet-light);
  text-shadow: 0 0 14px rgba(192,132,252,0.5);
  margin-bottom: 24px;
}

.hero__desc {
  margin-top: 0;
  max-width: 500px;
  font-size: 17px;
  line-height: 1.7;
  color: var(--clr-text-2);
  margin-bottom: 40px;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 12px 24px;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
}

.btn--primary {
  background-image: linear-gradient(
    135deg,
    var(--clr-pink-light) 0%,
    var(--clr-pink-light) 35%,
    #9840f0               60%,
    #7030c8               80%,
    #4c18a0               100%
  );
  background-size: 250% 100%;
  background-position: right center;
  color: #fff;
  border: none;
  box-shadow: 0 0 18px rgba(168,85,247,0.22), 0 0 36px rgba(224,64,160,0.12);
  transition: background-position 0.35s ease, box-shadow 0.35s ease;
}

.btn--primary:hover {
  background-position: left center;
  box-shadow: 0 0 24px rgba(224,64,160,0.55), 0 0 60px rgba(168,85,247,0.25);
}

.btn--outline {
  background: transparent;
  color: rgba(240, 238, 255, 0.65);
  border-color: var(--clr-border-2);
}

.btn--outline:hover {
  color: var(--clr-text);
  border-color: var(--clr-text);
}

/* Hero stat bar */
.hero__stats {
  position: absolute;
  right: var(--gap-md);
  bottom: 32px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-end;
}

.hero__stat {
  text-align: right;
}

.hero__stat-num {
  font-family: var(--font-display);
  font-size: 36px;
  line-height: 1;
  color: var(--clr-text);
}

.hero__stat-label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  margin-top: 2px;
}

/* =============================================
   TICKER / ANNOUNCEMENT BAR
   ============================================= */
.ticker {
  background: linear-gradient(90deg, #9840f0 0%, #7030c8 55%, #4c18a0 100%);
  overflow: hidden;
  height: 38px;
  display: flex;
  align-items: center;
  position: relative;
}

.ticker__label {
  flex-shrink: 0;
  background: linear-gradient(to right, #4c18a0 calc(100% - 36px), transparent 100%);
  height: 100%;
  display: flex;
  align-items: center;
  padding: 0 52px 0 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #ffffff;
  white-space: nowrap;
  z-index: 2;
}

.ticker__track {
  display: flex;
  gap: 0;
  animation: ticker-scroll 42s linear infinite;
  will-change: transform;
}

.ticker__item {
  white-space: nowrap;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0 36px;
  position: relative;
  color: #ffffff;
}

.ticker__item::after {
  content: '◆';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%) translateX(50%);
  font-size: 7px;
  opacity: 0.6;
}

@keyframes ticker-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* =============================================
   SECTION SHARED
   ============================================= */
.section {
  padding: var(--gap-xl) 0;
}

.section--bordered {
  border-top: 1px solid var(--clr-border);
}

.section__header {
  margin-bottom: var(--gap-lg);
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-top: 12px;
  text-shadow: 0 0 60px rgba(240,238,255,0.09);
}

.section__subtitle {
  font-size: 16px;
  color: var(--clr-text-2);
  max-width: 560px;
  margin-top: 16px;
  line-height: 1.7;
}

/* =============================================
   ABOUT SECTION
   ============================================= */
.about {
  background: var(--clr-bg-2);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-xl);
  align-items: center;
}

.about__text {
  font-size: 18px;
  line-height: 1.75;
  color: var(--clr-text-2);
}

.about__text strong {
  color: var(--clr-text);
  font-weight: 600;
}

.about__pillars {
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
}

.pillar {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 6px;
  transition: border-color 0.2s, background 0.2s;
}

.pillar:hover {
  border-color: var(--clr-border-2);
  background: var(--clr-surface-2);
}

.pillar__icon {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--clr-red-light);
  line-height: 1;
  flex-shrink: 0;
  width: 40px;
  text-align: center;
}

.pillar__name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.pillar__desc {
  font-size: 13px;
  color: var(--clr-text-2);
  line-height: 1.6;
}

/* =============================================
   BARBOARDLAB SECTION
   ============================================= */
.lab {
  background: var(--clr-bg);
  position: relative;
  overflow: hidden;
}

.lab::before {
  content: 'BBL';
  position: absolute;
  right: -15px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 280px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(255,255,255,0.02);
  pointer-events: none;
  user-select: none;
}

.lab__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-xl);
  align-items: center;
}

.lab__intro {
  position: sticky;
  top: calc(var(--nav-h) + var(--gap-md));
}

.lab__description {
  font-size: 16px;
  color: var(--clr-text-2);
  line-height: 1.75;
  margin-top: 24px;
}

.lab__meta {
  display: flex;
  gap: var(--gap-sm);
  flex-wrap: wrap;
  margin-top: 28px;
}

.lab__meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--clr-text-2);
}

.lab__meta-item::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(90deg, var(--clr-violet), var(--clr-accent));
  flex-shrink: 0;
  margin-top: -2px;
}

.lab__cta {
  margin-top: 32px;
}

/* Chart ranking widget */
.chart-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chart-item {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: center;
  gap: var(--gap-sm);
  padding: 8px 16px;
  background-color: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  cursor: default;
  pointer-events: none;
}

.chart-item--top {
  border-color: rgba(200,152,42,0.35);
  background: linear-gradient(90deg, rgba(200,152,42,0.12) 0%, rgba(224,176,64,0.06) 40%, transparent 100%);
  box-shadow: 0 0 16px rgba(200,152,42,0.1), inset 0 1px 0 rgba(224,176,64,0.15);
}

.chart-rank {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--clr-text-3);
  text-align: center;
  line-height: 1;
}

.chart-item--top .chart-rank {
  color: var(--clr-gold-light);
  text-shadow: 0 0 12px rgba(224,176,64,0.6);
}

.chart-song {
  min-width: 0;
}

.chart-song__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--clr-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chart-song__artist {
  font-size: 12px;
  color: var(--clr-text-2);
  margin-top: 2px;
}

.chart-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 2px;
}

.chart-badge--new {
  background: var(--clr-red-dim);
  color: var(--clr-red-light);
  border: 1px solid var(--clr-red-light);
}

.chart-badge--peak {
  background: rgba(200,152,42,0.12);
  color: var(--clr-gold-light);
  border: 1px solid var(--clr-gold);
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--gap-sm);
}

.chart-header__title {
  font-size: 16px;
  color: var(--clr-text-2);
  line-height: 1.75;
}

.chart-header__week {
  font-size: 16px;
  color: rgba(240,238,255,0.8);
  line-height: 1.75;
}

/* =============================================
   BARVISION SECTION
   ============================================= */
.barvision {
  background: var(--clr-bg-2);
  position: relative;
  overflow: hidden;
}

.barvision__backdrop {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 15% 50%, rgba(0,180,255,0.10) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 20%, rgba(224,64,160,0.09) 0%, transparent 50%);
  pointer-events: none;
}

.barvision__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.barvision__subtitle {
  font-size: 16px;
  color: var(--clr-text-2);
  line-height: 1.75;
  margin-top: 20px;
}

/* Season status card */
.season-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  overflow: hidden;
}

.season-card__banner {
  background: linear-gradient(135deg, #080818 0%, #12103a 50%, #0e0a28 100%);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--clr-border);
}

.season-card__banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 32px 32px;
}

.season-card__edition {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.8vw, 45px);
  line-height: 1;
  letter-spacing: 0.02em;
  white-space: nowrap;
  position: relative;
  z-index: 1;
}

.season-card__name {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clr-red-light);
  margin-top: 8px;
  position: relative;
  z-index: 1;
}

.season-card__body {
  padding: 24px 28px;
}

.season-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--clr-red-light);
  margin-bottom: 16px;
}

.season-status__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-red-light);
  animation: ripple-out-pink 1.2s ease-out infinite;
  margin-top: -2px;
}

@keyframes ripple-out-pink {
  0%   { box-shadow: 0 0 0 0 rgba(240,96,184,0.7); }
  100% { box-shadow: 0 0 0 5px rgba(240,96,184,0); }
}

.season-phases {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.phase {
  display: grid;
  grid-template-columns: 1fr auto auto 76px;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  padding: 10px 14px;
  background: var(--clr-bg-2);
  border-radius: 4px;
  border: 1px solid var(--clr-border);
}

.phase--active {
  border-color: var(--clr-red-dim);
  background: var(--clr-red-dim);
}

.phase__name {
  font-weight: 600;
  color: var(--clr-text-2);
}

.phase--active .phase__name {
  color: var(--clr-text);
}

.phase__date {
  font-size: 11px;
  color: var(--clr-text-3);
  font-family: var(--font-mono);
  min-width: 76px;
  text-align: left;
}

.phase__badge {
  font-family: var(--font-body);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 5px;
  border-radius: 2px;
  white-space: nowrap;
  flex-shrink: 0;
}

.phase__badge--vote {
  background: var(--clr-accent-dim);
  color: var(--clr-accent-light);
  border: 1px solid rgba(0,180,255,0.4);
}

.phase__badge--live {
  background: var(--clr-violet-dim);
  color: var(--clr-violet-light);
  border: 1px solid rgba(168,85,247,0.4);
}

.phase__status {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-red-light);
}

.phase__status--pending {
  color: var(--clr-text-3);
  visibility: hidden;
}

.season-card__footer {
  padding: 16px 28px;
  border-top: 1px solid var(--clr-border);
  display: flex;
  gap: 12px;
}

/* Barvision edition grid */
.barvision__editions {
  margin-top: var(--gap-lg);
}

.editions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--gap-xs);
  margin-top: var(--gap-sm);
}

.edition-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  padding: 16px;
  text-align: center;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.edition-card:not(.edition-card--active):hover {
  border-color: var(--clr-border-2);
  background: var(--clr-surface-2);
}

.edition-card--active:hover {
  border-color: rgba(168,85,247,0.8);
  background: linear-gradient(135deg, rgba(168,85,247,0.18) 0%, rgba(0,180,255,0.08) 100%);
  box-shadow: 0 0 28px rgba(168,85,247,0.25), 0 0 0 1px rgba(168,85,247,0.35);
}

.edition-card__num {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--clr-red-light);
  line-height: 1;
}

.edition-card__year {
  font-size: 12px;
  color: var(--clr-text-3);
  margin-top: 4px;
  font-family: var(--font-mono);
}

.edition-card__winner {
  font-size: 11px;
  color: var(--clr-text-2);
  margin-top: 6px;
  font-weight: 600;
}

.edition-card--active {
  border-color: rgba(168,85,247,0.5);
  background: linear-gradient(135deg, rgba(168,85,247,0.1) 0%, rgba(0,180,255,0.04) 100%);
  box-shadow: 0 0 20px rgba(168,85,247,0.12), 0 0 0 1px rgba(168,85,247,0.2);
  position: relative;
}

.edition-card--active::after {
  content: '';
  position: absolute;
  top: 12px;
  right: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-violet-light);
  box-shadow: 0 0 6px rgba(192,132,252,0.9);
  animation: ripple-out 1.2s ease-out infinite;
}

@keyframes ripple-out {
  0%   { box-shadow: 0 0 0 0 rgba(192,132,252,0.7); }
  100% { box-shadow: 0 0 0 5px rgba(192,132,252,0); }
}

.edition-card--active .edition-card__num {
  color: var(--clr-violet-light);
  text-shadow: 0 0 20px rgba(192,132,252,0.4);
}

.edition-card--active .edition-card__winner {
  color: var(--clr-accent);
}

.bv-archive-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--clr-text-2);
  transition: color 0.2s;
}

.bv-archive-link:hover {
  color: var(--clr-violet-light);
}

.bv-chevrons {
  transition: transform 0.2s, opacity 0.2s;
  flex-shrink: 0;
  opacity: 0.45;
}

.bv-archive-link:hover .bv-chevrons {
  opacity: 0.85;
  transform: translateX(3px);
}

/* =============================================
   UPDATES SECTION
   ============================================= */
.updates {
  background: var(--clr-bg);
}

.updates__grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--gap-xl);
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.update-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--gap-sm);
  padding: var(--gap-sm) 0;
  border-bottom: 1px solid var(--clr-border);
  align-items: start;
  transition: background 0.15s;
}

.update-item:hover {
  background: var(--clr-red-dim);
  margin: 0 -16px;
  padding-left: 16px;
  padding-right: 16px;
  border-radius: 4px;
}

.update-item:last-child {
  border-bottom: none;
}

.update-date {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--clr-text-3);
  padding-top: 3px;
}

.update-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--clr-text);
  line-height: 1.5;
}

.update-desc {
  font-size: 13px;
  color: var(--clr-text-2);
  margin-top: 4px;
  line-height: 1.55;
}

/* Sidebar links */
.quick-links {
  display: flex;
  flex-direction: column;
  gap: var(--gap-xs);
}

.quick-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--clr-text-2);
  transition: all 0.2s;
}

.quick-link:hover {
  color: var(--clr-text);
  border-color: var(--clr-border-2);
  background: var(--clr-surface-2);
}

.quick-link__arrow {
  font-size: 16px;
  color: var(--clr-red-light);
  transition: transform 0.2s;
}

.quick-link:hover .quick-link__arrow {
  transform: translateX(4px);
}

/* =============================================
   ARCHIVE PREVIEW
   ============================================= */
.archive {
  background: var(--clr-bg-2);
}

.archive__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-sm);
}

.archive-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 6px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 200px;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.archive-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-violet), var(--clr-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}

.archive-card:hover {
  border-color: var(--clr-border-2);
  background: var(--clr-surface-2);
  transform: translateY(-2px);
}

.archive-card:hover::before {
  transform: scaleX(1);
}

.archive-card__icon {
  font-family: var(--font-display);
  font-size: 40px;
  color: var(--clr-text-3);
  line-height: 1;
  margin-bottom: auto;
}

.archive-card__title {
  font-size: 16px;
  font-weight: 700;
  margin-top: auto;
  margin-bottom: 6px;
}

.archive-card__desc {
  font-size: 12px;
  color: var(--clr-text-2);
  line-height: 1.5;
}

.archive-card__footer {
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.archive-card__count {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--clr-red-light);
  line-height: 1;
}

.archive-card__link {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.2s;
}

.archive-card:hover .archive-card__link {
  color: var(--clr-red-light);
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--clr-bg);
  border-top: 1px solid var(--clr-border);
  padding: var(--gap-lg) 0 var(--gap-md);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--gap-lg);
  margin-bottom: var(--gap-lg);
}

.footer__logo {
  margin-top: 0 !important;
  margin-bottom: 10px;
  text-decoration: none;
}

.footer__tagline {
  font-size: 14px;
  color: var(--clr-text-2);
  max-width: 260px;
  line-height: 1.6;
  margin-top: 24px;
}

.footer__col-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  margin-bottom: var(--gap-sm);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__links a {
  font-size: 13px;
  color: var(--clr-text-2);
  transition: color 0.2s;
}

.footer__links a:hover {
  color: var(--clr-text);
}

.footer__bottom {
  padding-top: var(--gap-md);
  border-top: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-sm);
  flex-wrap: wrap;
}

.footer__copy {
  font-size: 12px;
  color: var(--clr-text-3);
}

.footer__notice {
  font-size: 12px;
  color: var(--clr-text-3);
  text-align: right;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .about__grid,
  .lab__layout,
  .barvision__layout,
  .updates__grid {
    grid-template-columns: 1fr;
    gap: var(--gap-lg);
  }

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

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

  .hero__stats {
    display: none;
  }

  .lab__intro {
    position: static;
  }
}

@media (max-width: 768px) {
  :root {
    --gap-md: 20px;
    --gap-lg: 48px;
    --gap-xl: 64px;
  }

  .nav__links {
    display: none;
  }

  .nav__menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .archive__grid {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--gap-md);
  }

  .hero__title {
    font-size: 64px;
  }

  .ticker__track {
    animation-duration: 28s;
  }

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

@media (max-width: 480px) {
  .hero__title {
    font-size: 52px;
  }

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

/* =============================================
   ANIMATIONS
   ============================================= */
@media (prefers-reduced-motion: no-preference) {
  .fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }

  .fade-up.visible {
    opacity: 1;
    transform: translateY(0);
  }

  .fade-up:nth-child(2) { transition-delay: 0.1s; }
  .fade-up:nth-child(3) { transition-delay: 0.2s; }
  .fade-up:nth-child(4) { transition-delay: 0.3s; }
  .fade-up:nth-child(5) { transition-delay: 0.4s; }
  .fade-up:nth-child(6) { transition-delay: 0.5s; }
}



/* Ticker 贴在 Hero 底部 */
.hero__ticker-wrap {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 20;
}

/* =============================================
   HERO SPLIT — 第一屏左右分栏
   ============================================= */

.hero {
  height: 100vh;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.hero__split {
  position: relative;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: stretch;
  height: calc(100% - 38px);
}

/* 左侧 intro — 垂直居中 */
.hero__left {
  padding: var(--gap-lg) var(--gap-lg) var(--gap-xl) calc((100vw / 2 - var(--max-width) / 2) + var(--gap-md));
  display: flex;
  gap: 20px;
  flex-direction: column;
  justify-content: center;
}

/* 右侧 updates — 垂直居中，竖向分隔线 */
.hero__right {
  padding: var(--gap-lg) calc((100vw / 2 - var(--max-width) / 2) + var(--gap-md)) var(--gap-lg) var(--gap-lg);
  border-left: none;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

/* updates 整体容器 — 撑满右侧，label+title 顶部，list 底部 */
.hero__updates-block {
  display: flex;
  flex-direction: column;
  }

.hero__updates-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 5vw, 72px);
  line-height: 0.9;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-top: 8px;
  margin-bottom: 20px;
  color: var(--clr-text);
}

.hero__update-list {
  display: flex;
  flex-direction: column;
  margin-top: 8px;
}

.hero__update-item {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--clr-border);
  align-items: start;
}

.hero__update-item:last-child {
  border-bottom: none;
}

.hero__update-date {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--clr-text-3);
  padding-top: 2px;
  line-height: 1.4;
  flex-shrink: 0;
}

.hero__update-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--clr-text);
  line-height: 1.45;
}

.hero__update-desc {
  font-size: 12px;
  color: var(--clr-text-2);
  margin-top: 3px;
  line-height: 1.55;
}

/* Hero title */
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(72px, 10vw, 130px);
  line-height: 0.88;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
}

.hero__title-bar   { color: var(--clr-text); }
.hero__title-board { color: var(--clr-violet-light); text-shadow: 0 0 40px rgba(192,132,252,0.25); }

@keyframes scroll-line {
  0%, 100% { opacity: 0.3; }
  50%       { opacity: 1; }
}

/* =============================================
   HERO RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  .hero__split {
    grid-template-columns: 1fr;
  }

  .hero__right {
    border-left: none;
    border-top: 1px solid var(--clr-border);
    max-height: none;
  }

  .hero__title {
    font-size: clamp(56px, 14vw, 96px);
  }
}

.hero__glow {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    /* 顶部右上：深紫蓝主光 */
    radial-gradient(ellipse 65% 55% at 102%  -5%,  rgba(90,  50, 200, 0.38) 0%, transparent 65%),
    /* 顶部左上：暗紫补光 */
    radial-gradient(ellipse 45% 45% at  -2%  -5%,  rgba(70,  30, 160, 0.24) 0%, transparent 60%),
    /* 右侧中部：电蓝侧光 */
    radial-gradient(ellipse 55% 65% at 105%  55%,  rgba( 0, 140, 230, 0.20) 0%, transparent 58%),
    /* 底部中央：霓虹粉紫（两江交汇意象） */
    radial-gradient(ellipse 70% 45% at  50% 108%,  rgba(200, 40, 170, 0.30) 0%, transparent 65%),
    /* 底部左侧：蓝紫漫反射 */
    radial-gradient(ellipse 50% 40% at  -5% 105%,  rgba(20,  80, 220, 0.24) 0%, transparent 60%),
    /* 底部右侧：洋红漫反射 */
    radial-gradient(ellipse 45% 38% at 105% 105%,  rgba(220, 30, 150, 0.22) 0%, transparent 58%),
    /* 中心：极淡青蓝晕（两江汇流） */
    radial-gradient(ellipse 50% 35% at  50%  50%,  rgba( 0, 180, 210, 0.07) 0%, transparent 70%);
}

/* ── Scroll Hint 双箭头 + 渐隐 ── */
.hero__scroll-hint {
  position: absolute;
  bottom: 54px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: #6a6488;
  white-space: nowrap;
  opacity: 1;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.hero__scroll-hint.hidden {
  opacity: 0;
}

.hero__scroll-hint::before {
  display: none;
}

.scroll-hint-text {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: #6a6488;
}

/* SVG 双箭头 — 整体一起运动 */
.scroll-chevrons {
  display: block;
  color: #6a6488;
  animation: chevron-bounce 1.6s ease-in-out infinite;
  margin-bottom: 4px;
  margin-top: 16px;
}

/* 两条线本身不单独动，只控制透明度区分层次 */
.chevron--1 { opacity: 0.45; }
.chevron--2 { opacity: 0.9; }

@keyframes chevron-bounce {
  0%   { transform: translateY(0);   opacity: 0.5; }
  50%  { transform: translateY(5px); opacity: 1;   }
  100% { transform: translateY(0);   opacity: 0.5; }
}

/* ── Nav Logo ── */
.nav__logo {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: 'Bebas Neue', Impact, 'Arial Black', Arial, sans-serif !important;
  font-size: 26px !important;
  font-weight: 400 !important;
  letter-spacing: 0.02em;
  line-height: 1;
  color: #f0eeff !important;
  text-decoration: none;
  margin-top: 0px;
}

.nav__logo-img {
  width: 26px;
  height: 26px;
  mix-blend-mode: screen;
  opacity: 0.92;
  flex-shrink: 0;
  display: inline-block;
  margin-top: -5px;
}

.nav__logo-board {
  color: #6F9EC3;
  margin-left: 1px;
}