/* ============================================================
   PG电竞赛场 | /assets/site.css
   全站共享样式：Reset / Token / 排版 / 头部 / 页脚 / 通用组件
   ============================================================ */

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  overflow-x: hidden;
}

main { display: block; }

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

svg { display: inline-block; flex-shrink: 0; }

ul, ol { list-style: none; }

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

button {
  font: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
  color: inherit;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: .02em;
  text-transform: uppercase;
}

p { margin-bottom: 1em; }

::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb {
  background: #2A2F3A;
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover { background: var(--color-accent-alt); }

/* ---------- Tokens ---------- */
:root {
  --color-bg: #0A0B0F;
  --color-panel: #12141C;
  --color-text: #F2F4F8;
  --color-muted: #9CA3B0;
  --color-accent: #00E5FF;
  --color-accent-alt: #A855F7;
  --color-lime: #C6FF00;
  --color-warn: #FF8C00;

  --font-head: 'Impact', 'Oswald', 'Arial Black', sans-serif;
  --font-body: 'Inter', 'Segoe UI', 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --container-w: 1200px;
  --container-pad: clamp(20px, 4vw, 48px);
  --section-pad: clamp(48px, 8vw, 96px);

  --header-h: 60px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 22px;
  --text-2xl: 28px;
  --text-3xl: 36px;
  --text-4xl: 48px;
  --text-5xl: 64px;

  --ease: cubic-bezier(.4, 0, .2, 1);
  --dur: 240ms;
  --shadow: 0 8px 32px rgba(0, 0, 0, .5);
}

@media (min-width: 768px) {
  :root { --header-h: 72px; }
}

/* ---------- Utilities ---------- */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.visually-hidden {
  position: absolute !important;
  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: 0;
  left: 0;
  z-index: 1000;
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent);
  color: var(--color-bg);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-100%);
  transition: transform 150ms ease;
}
.skip-link:focus {
  transform: translateY(0);
}

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

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.site-header.is-scrolled,
body[data-header-mode="solid"] .site-header {
  background: rgba(10, 11, 15, .94);
  border-bottom-color: rgba(0, 229, 255, .12);
  box-shadow: 0 4px 24px rgba(0, 0, 0, .55);
}

.site-header__ticks {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background-image: linear-gradient(90deg, rgba(0, 229, 255, .55) 1px, transparent 1px);
  background-size: 32px 100%;
  background-repeat: repeat-x;
  opacity: .35;
  border-bottom: 1px solid rgba(0, 229, 255, .08);
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.site-header__logo {
  width: 34px;
  height: 34px;
  transition: transform var(--dur) var(--ease);
}
.site-header__brand:hover .site-header__logo {
  transform: rotate(8deg) scale(1.05);
}

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

.site-header__brand-name {
  font-family: var(--font-head);
  font-size: 19px;
  letter-spacing: .06em;
  color: var(--color-text);
  text-transform: uppercase;
}

.site-header__brand-tag {
  font-size: var(--text-xs);
  color: var(--color-muted);
  letter-spacing: .1em;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--color-muted);
  text-transform: uppercase;
  transition: color var(--dur) var(--ease);
}
.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: var(--space-3);
  right: var(--space-3);
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--dur) var(--ease);
}
.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--color-text);
}
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  position: relative;
  z-index: 220;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}
.nav-toggle:hover {
  border-color: rgba(0, 229, 255, .3);
}

.nav-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  transition:
    transform var(--dur) var(--ease),
    opacity var(--dur) var(--ease);
}
.nav-toggle.is-active .nav-toggle__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.is-active .nav-toggle__line:nth-child(2) {
  opacity: 0;
}
.nav-toggle.is-active .nav-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-header__progress {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 6;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 80ms linear;
  pointer-events: none;
}

/* ---------- Mobile Nav Drawer ---------- */
@media (max-width: 959px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 210;
    width: min(320px, 82vw);
    height: 100vh;
    overflow-y: auto;
    padding: calc(var(--header-h) + var(--space-5)) var(--space-5) var(--space-5);
    background: var(--color-bg);
    border-left: 1px solid rgba(0, 229, 255, .2);
    transform: translateX(100%);
    visibility: hidden;
    transition:
      transform var(--dur) var(--ease),
      visibility 0s linear var(--dur);
  }
  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
    transition:
      transform var(--dur) var(--ease),
      visibility 0s;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
  }

  .site-nav__link {
    padding: var(--space-3);
    font-size: 18px;
    color: var(--color-text);
    border-left: 2px solid transparent;
    transition:
      color var(--dur) var(--ease),
      border-color var(--dur) var(--ease),
      background var(--dur) var(--ease);
  }
  .site-nav__link::after { display: none; }
  .site-nav__link:hover,
  .site-nav__link[aria-current="page"] {
    color: var(--color-accent);
    border-left-color: var(--color-accent);
    background: rgba(0, 229, 255, .05);
  }

  body.nav-open {
    overflow: hidden;
  }
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  background: var(--color-panel);
  border-top: 1px solid rgba(0, 229, 255, .15);
  padding: var(--space-7) 0 var(--space-4);
  overflow: hidden;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-accent-alt), transparent);
  opacity: .5;
}

.site-footer__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(242, 244, 248, .03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 244, 248, .03) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-4);
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-footer__mark {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 0 8px rgba(0, 229, 255, .35));
}

.site-footer__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.site-footer__brand-name {
  font-family: var(--font-head);
  font-size: 20px;
  letter-spacing: .05em;
  color: var(--color-text);
  text-transform: uppercase;
}

.site-footer__brand-desc {
  font-size: var(--text-xs);
  color: var(--color-muted);
  letter-spacing: .08em;
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-content: flex-start;
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-muted);
  border: 1px solid rgba(242, 244, 248, .1);
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}
.site-footer__link:hover {
  color: var(--color-accent);
  border-color: rgba(0, 229, 255, .3);
  background: rgba(0, 229, 255, .04);
}

.site-footer__contact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  padding: var(--space-4) 0;
  border-top: 1px solid rgba(242, 244, 248, .06);
  border-bottom: 1px solid rgba(242, 244, 248, .06);
  margin-bottom: var(--space-4);
}

.site-footer__contact-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-muted);
}
.site-footer__contact-item::before {
  content: '▸';
  color: var(--color-accent);
  font-size: 10px;
}

.site-footer__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-footer__copy {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-muted);
  letter-spacing: .02em;
}

.site-footer__trust {
  margin: 0;
  font-size: var(--text-xs);
  color: rgba(156, 163, 176, .65);
  max-width: 72ch;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .site-footer__top {
    grid-template-columns: 1fr auto;
    align-items: start;
  }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 26px;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  text-decoration: none;
  line-height: 1.4;
  border: 1px solid transparent;
  transition:
    color var(--dur) var(--ease),
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: #0A0B0F;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}
.btn--primary:hover {
  background: #33EAFF;
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: rgba(242, 244, 248, .3);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}
.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.btn--block {
  display: flex;
  width: 100%;
}

/* ---------- Section ---------- */
.section {
  padding: var(--section-pad) 0;
}
.section--alt {
  background: var(--color-panel);
  border-top: 1px solid rgba(242, 244, 248, .05);
  border-bottom: 1px solid rgba(242, 244, 248, .05);
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-3);
  margin-bottom: var(--space-5);
}
.section__head::after {
  content: '';
  display: block;
  flex: 1 1 60px;
  height: 1px;
  background: linear-gradient(90deg, rgba(0, 229, 255, .25), transparent);
  align-self: center;
}

.section__index {
  font-family: var(--font-head);
  font-size: var(--text-sm);
  color: var(--color-accent);
  letter-spacing: .18em;
  white-space: nowrap;
}

.section__title {
  font-family: var(--font-head);
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: .02em;
}

.section__subtitle {
  flex-basis: 100%;
  color: var(--color-muted);
  max-width: 62ch;
  font-size: var(--text-base);
  margin-top: var(--space-1);
}

/* ---------- Chamfer Panel ---------- */
.chamfer-panel {
  --chamfer: 12px;
  position: relative;
  padding: var(--space-5);
  background:
    linear-gradient(var(--color-panel), var(--color-panel)) padding-box,
    linear-gradient(135deg, rgba(0, 229, 255, .35), rgba(168, 85, 247, .15)) border-box;
  border: 1px solid transparent;
  clip-path: polygon(
    var(--chamfer) 0,
    calc(100% - var(--chamfer)) 0,
    100% var(--chamfer),
    100% calc(100% - var(--chamfer)),
    calc(100% - var(--chamfer)) 100%,
    var(--chamfer) 100%,
    0 calc(100% - var(--chamfer)),
    0 var(--chamfer)
  );
}

.chamfer-panel--accent {
  background:
    linear-gradient(rgba(0, 229, 255, .04), rgba(168, 85, 247, .04)) padding-box,
    linear-gradient(135deg, rgba(0, 229, 255, .55), rgba(168, 85, 247, .3)) border-box;
}

/* ---------- Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: .08em;
  border: 1px solid transparent;
  white-space: nowrap;
}

.tag--purple {
  background: rgba(168, 85, 247, .1);
  color: #C084FC;
  border-color: rgba(168, 85, 247, .3);
}
.tag--green {
  background: rgba(198, 255, 0, .08);
  color: var(--color-lime);
  border-color: rgba(198, 255, 0, .25);
}
.tag--orange {
  background: rgba(255, 140, 0, .08);
  color: var(--color-warn);
  border-color: rgba(255, 140, 0, .3);
}
.tag--blue {
  background: rgba(0, 229, 255, .08);
  color: var(--color-accent);
  border-color: rgba(0, 229, 255, .25);
}

/* ---------- Data Chip ---------- */
.data-chip {
  display: inline-flex;
  flex-direction: column;
  padding: var(--space-2) var(--space-3);
  border-left: 2px solid var(--color-accent);
  background: rgba(0, 229, 255, .05);
  line-height: 1.3;
}

.data-chip__value {
  font-family: var(--font-head);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
}

.data-chip__label {
  font-size: var(--text-xs);
  color: var(--color-muted);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ---------- Grid ---------- */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 960px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 1200px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Image / Visual Frame ---------- */
.image-frame {
  position: relative;
  overflow: hidden;
  min-height: 200px;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(var(--color-panel), var(--color-panel)) padding-box,
    linear-gradient(135deg, rgba(0, 229, 255, .3), rgba(168, 85, 247, .1)) border-box;
  border: 1px solid transparent;
  clip-path: polygon(
    16px 0, calc(100% - 16px) 0, 100% 16px,
    100% calc(100% - 16px), calc(100% - 16px) 100%,
    16px 100%, 0 calc(100% - 16px), 0 16px
  );
}
.image-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, .05) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
  z-index: 0;
}
.image-frame > * {
  position: relative;
  z-index: 1;
}
.image-frame--wide { aspect-ratio: 16 / 9; }
.image-frame--tall { aspect-ratio: 3 / 4; }

.image-frame[data-frame-kind="diagonal"]::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 70px;
  height: 140%;
  background: linear-gradient(135deg, rgba(0, 229, 255, .2), transparent 70%);
  transform: rotate(24deg);
  pointer-events: none;
  z-index: 0;
}
.image-frame[data-frame-kind="glow"]::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 72% 22%, rgba(0, 229, 255, .18), transparent 55%),
    radial-gradient(circle at 24% 78%, rgba(168, 85, 247, .16), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

@media (max-width: 640px) {
  .image-frame {
    aspect-ratio: auto;
    min-height: 180px;
  }
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  padding: var(--space-3) 0;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  margin-inline: var(--space-2);
  color: rgba(156, 163, 176, .4);
}

.breadcrumb__link {
  color: var(--color-muted);
  transition: color var(--dur) var(--ease);
}
.breadcrumb__link:hover {
  color: var(--color-accent);
}

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

/* ---------- Slash Divider ---------- */
.slash-divider {
  position: relative;
  height: 1px;
  margin: var(--space-6) 0;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 255, .3), rgba(168, 85, 247, .3), transparent);
}
.slash-divider::before {
  content: '';
  position: absolute;
  left: 50%;
  top: -3px;
  width: 7px;
  height: 7px;
  background: var(--color-accent);
  transform: translateX(-50%) rotate(45deg);
}

/* ---------- Coordinate Line ---------- */
.coord-line {
  position: relative;
  height: 1px;
  margin: var(--space-5) 0;
  background: linear-gradient(90deg, rgba(0, 229, 255, .3), rgba(242, 244, 248, .06));
}
.coord-line::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 0;
  width: 7px;
  height: 7px;
  background: var(--color-accent);
}
.coord-line::after {
  content: '';
  position: absolute;
  top: -3px;
  right: 0;
  width: 7px;
  height: 7px;
  background: var(--color-accent-alt);
}

/* ---------- Scroll Reveal ---------- */
html.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity .7s var(--ease),
    transform .7s var(--ease);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}
html.js-enabled [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .site-header,
  .site-header__progress,
  .site-header__logo,
  .site-nav,
  .site-nav__link,
  .site-nav__link::after,
  .nav-toggle,
  .nav-toggle__line,
  .btn,
  .site-footer__link,
  [data-reveal] {
    transition: none !important;
  }
  html.js-enabled [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .skip-link {
    transition: none;
  }
}

/* ---------- Hero Base (页面使用) ---------- */
.hero {
  margin-top: calc(-1 * var(--header-h));
  padding-top: calc(var(--header-h) + var(--space-7));
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}