/* ==========================================================
   爱游戏CN · /assets/site.css
   赛场夜战 · 框架式导航 · 切角面板
   ========================================================== */

/* ---------- 1. 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 {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul,
ol {
  list-style: none;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

/* ---------- 2. CSS 变量 ---------- */
:root {
  --c-primary: #0B3D2E;
  --c-accent: #FF7A1A;
  --c-bg: #1A1D1F;
  --c-text: #F2F5F4;
  --c-muted: #9AA3A0;
  --c-border: #2D3436;
  --c-warning: #FFD700;
  --c-success: #2ECC71;
  --c-error: #E74C3C;
  --c-glass: rgba(255, 255, 255, 0.1);
  --font-display: Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
  --font-body: Georgia, "Times New Roman", serif;
  --font-mono: "Courier New", Courier, monospace;
  --header-h: 76px;
  --container-w: 1280px;
  --section-pad: clamp(2.5rem, 6vw, 5rem);
}

/* ---------- 3. 基础排版 ---------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--c-text);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

h4 {
  font-size: 1.125rem;
}

p {
  max-width: 65ch;
}

strong,
b {
  font-weight: 700;
}

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

[id] {
  scroll-margin-top: calc(var(--header-h) + 0.5rem);
}

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

/* ---------- 4. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: 1px;
}

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

.nav-link:focus-visible {
  color: var(--c-accent);
  outline-offset: -2px;
}

/* ---------- 5. Skip Link ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 1rem;
  z-index: 10002;
  transform: translateY(-130%);
  background: var(--c-accent);
  color: var(--c-bg);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.625rem 1.25rem;
  clip-path: polygon(0 0, 100% 0, 94% 100%, 0 100%);
  transition: transform 0.25s ease;
}

.skip-link:focus {
  transform: translateY(0);
  outline: none;
}

/* ---------- 6. 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--c-accent) 60%, var(--c-warning));
  z-index: 10001;
  pointer-events: none;
  box-shadow: 0 0 10px rgba(255, 122, 26, 0.45);
}

/* ---------- 7. Header ---------- */
.site-header {
  background: linear-gradient(180deg, #0D4634, var(--c-primary));
  border-bottom: 3px solid var(--c-accent);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 180px;
  height: 100%;
  background: repeating-linear-gradient(
    135deg,
    transparent 0 14px,
    rgba(255, 255, 255, 0.025) 14px 18px
  );
  pointer-events: none;
}

.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  min-height: var(--header-h);
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  position: relative;
}

/* ---- Brand ---- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.brand-mark {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--c-accent) 35%, #FFA45B 100%);
  clip-path: polygon(22% 0, 100% 0, 100% 78%, 78% 100%, 0 100%, 0 22%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(255, 122, 26, 0.30);
}

.brand-mark-core {
  width: 12px;
  height: 12px;
  background: var(--c-bg);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
  display: inline-block;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--c-text);
  line-height: 1;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-top: 0.25rem;
}

/* ---- Desktop Nav ---- */
.site-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 0.75rem;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--c-text);
  position: relative;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.125rem;
  height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--c-accent);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c-accent);
}

/* ---- Nav Toggle ---- */
.nav-toggle {
  display: none;
}

/* ---- Header CTA ---- */
.header-cta {
  margin-left: 0.5rem;
}

/* ---------- 8. Mobile Nav 状态 ---------- */
@media (max-width: 1023px) {
  :root {
    --header-h: 64px;
  }

  .header-inner {
    padding: 0.625rem 1.25rem;
    gap: 0.625rem;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
    background: var(--c-accent);
    color: var(--c-bg);
    font-family: var(--font-display);
    font-style: italic;
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.625rem 0.875rem;
    clip-path: polygon(0 0, 100% 0, 92% 100%, 0 100%);
    transition: background-color 0.2s ease;
  }

  .nav-toggle:hover {
    background: #FF8C3A;
  }

  .nav-toggle[aria-expanded="true"] {
    background: #fff;
  }

  .nav-toggle-box {
    width: 18px;
    height: 12px;
    position: relative;
    display: inline-block;
  }

  .nav-toggle-bar {
    display: block;
    width: 18px;
    height: 2px;
    background: currentColor;
    position: absolute;
    left: 0;
    transition: transform 0.25s ease, opacity 0.2s ease;
  }

  .nav-toggle-bar:nth-child(1) {
    top: 0;
  }

  .nav-toggle-bar:nth-child(2) {
    top: 5px;
  }

  .nav-toggle-bar:nth-child(3) {
    top: 10px;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(5px) 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(-5px) rotate(-45deg);
  }

  .site-nav {
    margin-left: 0;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--c-primary);
    border-top: 2px solid var(--c-accent);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
    display: none;
  }

  .site-nav[data-open] {
    display: block;
    animation: nav-slide-down 0.28s ease;
  }

  .nav-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0.5rem 1.5rem 1rem;
  }

  .nav-item {
    border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
  }

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

  .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 0.25rem;
    font-size: 1rem;
  }

  .nav-link::after {
    content: "→";
    font-family: var(--font-body);
    font-style: normal;
    font-weight: 400;
    color: var(--c-accent);
    font-size: 1.125rem;
    position: static;
    transform: none;
    background: none;
  }

  .nav-link:hover::after,
  .nav-link:focus-visible::after {
    transform: translateX(2px);
  }

  .nav-link[aria-current="page"] {
    color: var(--c-accent);
  }

  .nav-link[aria-current="page"]::after {
    color: var(--c-accent);
    transform: none;
  }

  .header-cta {
    margin-left: 0;
    font-size: 0.8125rem;
    padding: 0.5rem 0.875rem;
  }
}

@media (max-width: 767px) {
  .header-inner {
    padding: 0.5rem 1rem;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
  }

  .brand-name {
    font-size: 1.125rem;
  }

  .brand-sub {
    font-size: 0.5rem;
  }

  .brand-gap {
    gap: 0.5rem;
  }

  .header-cta {
    font-size: 0.75rem;
    padding: 0.5rem 0.75rem;
  }
}

@media (max-width: 479px) {
  .brand-sub {
    display: none;
  }

  .nav-toggle-text {
    display: none;
  }

  .nav-toggle {
    padding: 0.625rem;
  }
}

@keyframes nav-slide-down {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 9. Footer ---------- */
.site-footer {
  background: linear-gradient(180deg, var(--c-primary), #08291F);
  border-top: 3px solid var(--c-accent);
  margin-top: var(--section-pad);
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 100%;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    transparent 0 48px,
    rgba(255, 215, 0, 0.35) 48px 56px
  );
  pointer-events: none;
}

.footer-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .brand {
  margin-bottom: 1.25rem;
}

.brand-footer .brand-name {
  color: var(--c-text);
}

.brand-footer .brand-sub {
  color: var(--c-muted);
}

.footer-about {
  font-size: 0.9375rem;
  color: var(--c-text);
  margin-bottom: 0.875rem;
  max-width: 34ch;
}

.footer-trust {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--c-muted);
  line-height: 1.6;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--c-accent);
  max-width: 48ch;
}

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

.footer-heading {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.9375rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-accent);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
}

.footer-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 36px;
  height: 2px;
  background: var(--c-accent);
}

.footer-list li {
  margin-bottom: 0.625rem;
}

.footer-list li:last-child {
  margin-bottom: 0;
}

.footer-list a {
  color: var(--c-text);
  font-size: 0.9375rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
  position: relative;
}

.footer-list a:hover {
  color: var(--c-accent);
  padding-left: 0.375rem;
}

/* ---- Contact List ---- */
.contact-list {
  margin-top: 0.125rem;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  padding-bottom: 0.75rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
}

.contact-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.contact-label {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-accent);
}

.contact-value {
  font-size: 0.9375rem;
  color: var(--c-text);
  word-break: break-all;
}

/* ---- Footer Bottom ---- */
.footer-bottom {
  padding-top: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--c-muted);
}

/* ---------- 10. 通用组件 ---------- */

/* ---- Container ---- */
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---- Section ---- */
.section {
  padding: var(--section-pad) 0;
}

/* ---- Section Head ---- */
.section-head {
  margin-bottom: 2.5rem;
  position: relative;
  padding-left: 1rem;
  border-left: 4px solid var(--c-accent);
}

.section-head .kicker {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-accent);
  display: block;
  margin-bottom: 0.375rem;
}

.section-head h2,
.section-head h3 {
  margin: 0;
}

/* ---- Button ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.75rem 1.375rem;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: none;
  cursor: pointer;
  line-height: 1;
  color: var(--c-text);
  clip-path: polygon(0 0, 100% 0, 96% 100%, 0 100%);
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease,
    box-shadow 0.2s ease;
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-accent {
  background: var(--c-accent);
  color: var(--c-bg);
}

.btn-accent:hover {
  background: #FF8C3A;
  box-shadow: 0 4px 18px rgba(255, 122, 26, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--c-accent);
  box-shadow: inset 0 0 0 2px var(--c-accent);
}

.btn-outline:hover {
  background: rgba(255, 122, 26, 0.08);
  box-shadow: inset 0 0 0 2px var(--c-accent), 0 4px 18px rgba(255, 122, 26, 0.15);
}

.btn-label {
  display: inline-block;
}

.btn-arrow {
  font-family: var(--font-body);
  font-style: normal;
  font-size: 1.125rem;
  line-height: 1;
  transition: transform 0.2s ease;
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
}

/* ---- Card ---- */
.card {
  background: linear-gradient(150deg, #0D4634, var(--c-primary));
  border: 1px solid var(--c-border);
  padding: 1.75rem;
  clip-path: polygon(24px 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%, 0 24px);
  position: relative;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.card:hover {
  border-color: var(--c-accent);
  transform: translateY(-3px);
  filter: drop-shadow(0 8px 20px rgba(0, 0, 0, 0.4));
}

/* ---- Tag ---- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(255, 255, 255, 0.08);
  color: var(--c-muted);
  clip-path: polygon(0 0, 100% 0, 94% 100%, 0 100%);
  line-height: 1.4;
}

.tag-accent {
  background: var(--c-accent);
  color: var(--c-bg);
}

.tag-warning {
  background: rgba(255, 215, 0, 0.14);
  color: var(--c-warning);
}

.tag-success {
  background: rgba(46, 204, 113, 0.14);
  color: var(--c-success);
}

.tag-error {
  background: rgba(231, 76, 60, 0.14);
  color: var(--c-error);
}

/* ---- Data Number ---- */
.data-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-accent);
  font-variant-numeric: tabular-nums;
}

.data-num-lg {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
}

/* ---- Divider ---- */
.divider {
  height: 1px;
  background: linear-gradient(90deg, var(--c-accent) 0, var(--c-border) 40%, transparent 100%);
  border: none;
  margin: 2.5rem 0;
}

/* ---- 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));
}

@media (max-width: 1023px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ---- Split Screen ---- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}

.split-aside {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
}

@media (max-width: 1023px) {
  .split {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .split-aside {
    position: static;
  }
}

/* ---- Image Frame ---- */
.image-frame {
  position: relative;
  overflow: hidden;
  background: var(--c-glass);
  min-height: 220px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.image-frame-lg {
  min-height: 340px;
}

.image-frame-sm {
  min-height: 140px;
}

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

.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 61, 46, 0.25) 0%, transparent 45%);
  pointer-events: none;
}

/* ---- Arrow Link ---- */
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--c-accent);
  transition: gap 0.2s ease;
}

.arrow-link:hover {
  gap: 0.75rem;
}

.arrow-link::after {
  content: "→";
  font-family: var(--font-body);
  font-style: normal;
  font-size: 1.125rem;
  font-weight: 400;
  line-height: 1;
}

/* ---- Breadcrumb ---- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  padding: 0.875rem 0;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--c-muted);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--c-border);
}

.breadcrumb a {
  color: var(--c-accent);
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: #FFA45B;
}

/* ---------- 11. 响应式 Footer ---------- */
@media (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

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

@media (max-width: 767px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .footer-inner {
    padding: 2.5rem 1.25rem 1.5rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.375rem;
    text-align: center;
  }
}

/* ---------- 12. 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;
  }

  .btn:hover,
  .btn:active {
    transform: none;
  }

  .card:hover {
    transform: none;
  }

  .nav-toggle-bar,
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar {
    transition: none;
  }

  .brand-mark,
  .scroll-progress {
    box-shadow: none;
  }
}