/* ==========================================================
   云开竞技场 — 全站共享样式
   路径：/assets/site.css
   ========================================================== */

/* ---------- 1. Reset & Variables ---------- */

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

:root {
  /* 色彩 */
  --color-base: #0B1D3A;
  --color-base-deep: #0E274A;
  --color-accent: #00E5FF;
  --color-highlight: #FF7A00;
  --color-muted: #B8C7D9;
  --color-text: #F2F7FC;
  --color-carbon: #1A1A1A;
  --color-danger: #FF3B30;
  --color-success: #30D158;

  /* 字体 */
  --font-display: "Archivo Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", "PingFang SC", monospace;

  /* 度量 */
  --header-h: 64px;
  --container-w: 1280px;
  --container-pad: 24px;
  --border-color: rgba(0, 229, 255, 0.16);
  --border-strong: rgba(0, 229, 255, 0.34);
  --transition: 0.2s ease;
  --radius: 0px;

  /* 滚动进度变量 */
  --scroll-progress: 0;
}

@media (max-width: 560px) {
  :root {
    --header-h: 56px;
    --container-pad: 16px;
  }
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-base);
  padding-top: var(--header-h);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  display: block;
}

main,
#main-content {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

ul,
ol {
  padding-left: 1.3em;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-text);
}

p {
  margin: 0;
}

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

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

.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;
}

/* ---------- 2. Layout Utilities ---------- */

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.container--narrow {
  max-width: 820px;
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

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

@media (max-width: 920px) {
  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}

/* ---------- 3. Skip Link ---------- */

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 9999;
  background: var(--color-accent);
  color: var(--color-base);
  font-weight: 700;
  font-size: 14px;
  padding: 10px 18px;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform 0.2s ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* ---------- 4. Header ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(11, 29, 58, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  pointer-events: none;
  z-index: 5;
}

.scroll-progress::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-accent);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
  transform-origin: 0 50%;
  transform: scaleX(var(--scroll-progress, 0));
}

.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;
}

.brand-mark:hover,
.brand-mark:focus-visible {
  color: var(--color-text);
}

.brand-mono {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  border: 1px solid var(--border-strong);
  background: rgba(0, 229, 255, 0.08);
  padding: 4px 6px;
  line-height: 1;
  letter-spacing: 0.03em;
}

.brand-slash {
  color: var(--color-highlight);
  font-weight: 400;
}

.brand-cn {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

/* ---------- 5. Navigation ---------- */

.site-nav {
  display: flex;
  align-items: stretch;
  gap: clamp(12px, 2vw, 28px);
  height: 100%;
}

.site-nav > a {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  color: var(--color-muted);
  text-decoration: none;
  padding: 0 2px;
  white-space: nowrap;
  transition: color var(--transition), background var(--transition);
}

.site-nav > a:not(.quick-entry)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.25s ease;
}

.site-nav > a:hover,
.site-nav > a:focus-visible {
  color: var(--color-text);
}

.site-nav > a:not(.quick-entry):hover::after,
.site-nav > a:not(.quick-entry):focus-visible::after {
  transform: scaleX(1);
}

.site-nav > a[aria-current="page"] {
  color: var(--color-accent);
}

.site-nav > a[aria-current="page"]:not(.quick-entry)::after {
  transform: scaleX(1);
}

/* 快速进入按钮 */
.quick-entry {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-body);
  color: var(--color-base);
  background: var(--color-highlight);
  border: none;
  padding: 10px 18px;
  cursor: pointer;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}

.quick-entry:hover,
.quick-entry:focus-visible {
  background: #FF8C1A;
  transform: translateY(-1px);
}

/* 移动端导航按钮 */
.nav-toggle {
  display: none;
}

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  height: 100%;
  justify-content: center;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ---------- 6. Header / Nav Mobile States ---------- */

@media (max-width: 920px) {
  .nav-toggle {
    display: inline-flex;
    width: 42px;
    height: 42px;
    padding: 10px;
    background: transparent;
    border: 1px solid var(--border-color);
    cursor: pointer;
    flex-shrink: 0;
  }

  .nav-toggle:hover {
    border-color: var(--border-strong);
  }

  .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);
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    height: auto;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    background: rgba(11, 29, 58, 0.98);
    border-bottom: 2px solid var(--color-accent);
    padding: 8px 24px 24px;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

  .site-nav[data-open] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav > a {
    padding: 14px 4px;
    font-size: 16px;
    height: auto;
    width: 100%;
  }

  .site-nav > a:not(.quick-entry)::after {
    display: none;
  }

  .site-nav > a:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
  }

  .site-nav > a[aria-current="page"] {
    background: rgba(0, 229, 255, 0.06);
    border-left: 3px solid var(--color-accent);
    padding-left: 16px;
    color: var(--color-accent);
  }

  .site-nav > a[aria-current="page"]:not(:last-child) {
    border-bottom-color: rgba(0, 229, 255, 0.08);
  }

  .site-nav .quick-entry {
    margin-top: 16px;
    padding: 12px 18px;
    clip-path: none;
    width: 100%;
    border: none;
    border-radius: 0;
  }
}

/* ---------- 7. Footer ---------- */

.site-footer {
  background: var(--color-carbon);
  color: var(--color-muted);
  border-top: 2px solid var(--color-accent);
  font-size: 14px;
  margin-top: 48px;
}

.footer-grid {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 56px var(--container-pad) 40px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
}

.footer-brand .brand-mark {
  margin-bottom: 16px;
}

.footer-tagline {
  font-size: 13px;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  margin: 0 0 12px;
}

.footer-trust {
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-muted);
  opacity: 0.78;
  max-width: 42ch;
  margin: 0;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition), padding-left var(--transition);
  display: inline-block;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--color-text);
  padding-left: 4px;
}

.footer-contact {
  border-left: 1px solid var(--border-color);
  padding-left: 24px;
}

.footer-mono-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  letter-spacing: 0.14em;
  margin: 0 0 16px;
}

.footer-contact-line {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-muted);
}

.footer-bottom {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 20px var(--container-pad);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(184, 199, 217, 0.6);
}

@media (max-width: 920px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

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

  .footer-contact {
    grid-column: 1 / -1;
    border-left: none;
    padding-left: 0;
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 40px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 8. Section Panels ---------- */

.section-panel {
  position: relative;
  background: var(--color-base);
  border: 1px solid var(--border-color);
  padding: clamp(24px, 4vw, 56px);
  margin-bottom: 24px;
}

.section-panel::before {
  content: attr(data-panel-label);
  position: absolute;
  top: 14px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(0, 229, 255, 0.4);
  letter-spacing: 0.1em;
}

.section-panel--deeper {
  background: var(--color-base-deep);
}

.section-panel--dark {
  background: var(--color-carbon);
}

.section-panel--accent {
  border-top: 3px solid var(--color-accent);
}

.section-panel--orange {
  border-top: 3px solid var(--color-highlight);
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 20px;
  margin-bottom: 24px;
}

.panel-index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

.panel-title {
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0.02em;
}

.panel-subtitle {
  width: 100%;
  font-size: 16px;
  color: var(--color-muted);
  max-width: 60ch;
  line-height: 1.7;
}

/* ---------- 9. Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  padding: 14px 24px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  background: transparent;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn--cyan {
  background: var(--color-accent);
  color: var(--color-base);
}

.btn--cyan:hover,
.btn--cyan:focus-visible {
  background: #33EAFF;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.3);
}

.btn--orange {
  background: var(--color-highlight);
  color: var(--color-base);
}

.btn--orange:hover,
.btn--orange:focus-visible {
  background: #FF8C1A;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(255, 122, 0, 0.3);
}

.btn--outline {
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  background: rgba(0, 229, 255, 0.08);
}

/* ---------- 10. Cards ---------- */

.card {
  background: var(--color-base-deep);
  border: 1px solid var(--border-color);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.card--accent {
  border-left: 3px solid var(--color-accent);
}

.card--orange {
  border-left: 3px solid var(--color-highlight);
}

.card__title {
  font-size: 20px;
  margin: 0;
}

.card__body {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-muted);
  flex: 1;
}

.card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}

/* ---------- 11. Tags & Chips ---------- */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  background: rgba(0, 229, 255, 0.1);
  color: var(--color-accent);
  border: 1px solid rgba(0, 229, 255, 0.25);
}

.tag--orange {
  background: rgba(255, 122, 0, 0.1);
  color: var(--color-highlight);
  border-color: rgba(255, 122, 0, 0.3);
}

.tag--success {
  background: rgba(48, 209, 88, 0.1);
  color: var(--color-success);
  border-color: rgba(48, 209, 88, 0.3);
}

.data-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(0, 229, 255, 0.06);
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text);
}

.data-chip--orange {
  background: rgba(255, 122, 0, 0.06);
  border-color: rgba(255, 122, 0, 0.25);
  color: var(--color-highlight);
}

.data-chip__value {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

/* ---------- 12. Breadcrumb ---------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: rgba(0, 229, 255, 0.5);
}

.breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
}

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

/* ---------- 13. Data Table ---------- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: left;
  color: var(--color-accent);
  background: rgba(0, 229, 255, 0.06);
  border-bottom: 2px solid var(--border-strong);
  padding: 12px 16px;
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--color-text);
}

.data-table tr:hover td {
  background: rgba(0, 229, 255, 0.04);
}

/* ---------- 14. Image Frame ---------- */

.image-frame {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(rgba(0, 229, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.04) 1px, transparent 1px),
    linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(11, 29, 58, 0.35));
  background-size: 24px 24px, 24px 24px, 100% 100%;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.image-frame::before {
  content: attr(data-label);
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(0, 229, 255, 0.45);
  text-transform: uppercase;
  padding: 8px 12px;
  background: rgba(11, 29, 58, 0.6);
  border: 1px solid var(--border-color);
}

.image-frame--4-3 {
  aspect-ratio: 4 / 3;
}

.image-frame--1-1 {
  aspect-ratio: 1 / 1;
}

.image-frame--wide {
  aspect-ratio: 21 / 9;
}

/* ---------- 15. Reveal Animation ---------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.6s ease-out,
    transform 0.6s ease-out;
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal="visible"] {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 16. Mono Label ---------- */

.mono-label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  text-transform: uppercase;
}

/* ---------- 17. Reduced Motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .skip-link {
    transition: none;
  }

  .site-nav,
  .nav-toggle-bar,
  .quick-entry,
  .btn,
  .card {
    transition: none;
  }
}