/* ==========================================================
   九游会J9 Site CSS — /assets/site.css
   高原圣殿 × 赛事坐标 · 共享头部 / 页脚 / 通用组件
   ========================================================== */

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

:root {
  --color-primary: #C0392B;
  --color-primary-dark: #8E1F1A;
  --color-bg: #FDF8F0;
  --color-white: #FFFFFF;
  --color-gold: #D4AF37;
  --color-night: #1B3B6F;
  --color-sky: #4A7BB5;
  --color-sand: #E0D6C0;
  --color-text: #2C2C2C;
  --color-text-secondary: #666666;

  --font-heading: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Roboto Mono', 'SFMono-Regular', Consolas, 'Courier New', monospace;

  --header-height: 72px;
  --container-width: 1200px;
  --content-pad: 1.5rem;
  --radius-panel: 6px;
  --transition-base: 0.25s ease;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background: var(--color-bg);
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul,
ol {
  list-style: none;
}

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

a:hover {
  color: var(--color-primary);
}

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

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

section[id],
div[id] {
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

/* ---------- 通用工具 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

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

.section {
  padding: 5rem 0;
}

.section-heading {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 2.5rem;
  line-height: 1.25;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

/* ---------- Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 1000;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.75rem 1.5rem;
  border-radius: 0 0 10px 10px;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.24);
  transition: top 0.3s ease;
}

.skip-link:focus-visible {
  top: 0;
  color: var(--color-white);
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  color: var(--color-white);
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, color 0.3s ease,
    border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(253, 248, 240, 0.92);
  -webkit-backdrop-filter: saturate(1.2) blur(12px);
  backdrop-filter: saturate(1.2) blur(12px);
  color: var(--color-text);
  border-bottom-color: rgba(0, 0, 0, 0.05);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.reading-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 2;
  pointer-events: none;
}

.reading-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
}

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

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

.brand:hover {
  color: inherit;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 12px 4px 12px 4px;
  color: inherit;
  transition: background-color var(--transition-base),
    border-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled .brand-mark {
  background: var(--color-bg);
  border-color: rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

.brand-mark svg {
  width: 30px;
  height: 30px;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.25rem;
  line-height: 1.2;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand-name small {
  font-size: 0.78em;
  color: var(--color-gold);
  margin-left: 0.08em;
}

.brand-tagline {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.72);
  margin-top: 2px;
  transition: color var(--transition-base);
}

.site-header.is-scrolled .brand-tagline {
  color: var(--color-text-secondary);
}

/* Desktop Navigation */
.nav-main {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0;
  font-size: 0.94rem;
  font-weight: 500;
  color: inherit;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-base),
    border-color var(--transition-base);
}

.nav-link::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--color-gold);
  transform: rotate(45deg);
  flex-shrink: 0;
  transition: transform var(--transition-base),
    background-color var(--transition-base);
}

.nav-link:hover {
  color: var(--color-gold);
}

.nav-link:hover::before {
  transform: rotate(135deg) scale(1.2);
}

.nav-link[aria-current="page"] {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
}

.nav-link[aria-current="page"]::before {
  background: var(--color-gold);
  transform: rotate(135deg) scale(1.2);
}

.site-header.is-scrolled .nav-link:hover {
  color: var(--color-primary);
}

.site-header.is-scrolled .nav-link[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.version-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9375rem;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: inherit;
  white-space: nowrap;
  transition: background-color var(--transition-base),
    color var(--transition-base), border-color var(--transition-base);
}

.version-trigger:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.9);
}

.site-header.is-scrolled .version-trigger {
  border-color: rgba(0, 0, 0, 0.26);
}

.site-header.is-scrolled .version-trigger:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(192, 57, 43, 0.06);
}

.version-trigger-dot {
  width: 8px;
  height: 8px;
  background: var(--color-gold);
  border-radius: 50%;
  flex-shrink: 0;
}

/* Version Panel */
.version-panel {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(264px, calc(100vw - 2rem));
  background: var(--color-white);
  color: var(--color-text);
  border-radius: 12px;
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.18);
  padding: 1.25rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--transition-base),
    transform var(--transition-base), visibility var(--transition-base);
  z-index: 130;
}

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

.version-panel-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.version-panel-note {
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 0.875rem;
}

.version-options {
  display: grid;
  gap: 0.375rem;
}

.version-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.625rem 0.75rem;
  border-radius: 8px;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.version-option:hover {
  background: var(--color-bg);
  border-color: rgba(0, 0, 0, 0.08);
}

.version-option.is-active {
  border-color: var(--color-primary);
  background: rgba(192, 57, 43, 0.06);
}

.version-option-icon {
  width: 10px;
  height: 10px;
  border: 2px solid var(--color-gold);
  border-radius: 50%;
  flex-shrink: 0;
}

.version-option.is-active .version-option-icon {
  background: var(--color-gold);
  box-shadow: inset 0 0 0 2px var(--color-white);
}

.version-option-name {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--color-text);
}

.version-option-desc {
  display: block;
  font-size: 0.72rem;
  color: var(--color-text-secondary);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0.625rem;
  border-radius: 8px;
  color: inherit;
  transition: background-color var(--transition-base);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.14);
}

.site-header.is-scrolled .nav-toggle:hover {
  background: rgba(0, 0, 0, 0.06);
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(4) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 120;
  background: var(--color-bg);
  color: var(--color-text);
  padding: 2rem var(--content-pad) 3rem;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateX(4%);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
}

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

.mobile-nav-list {
  display: flex;
  flex-direction: column;
}

.mobile-nav-item {
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
}

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

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9375rem 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-text);
  transition: color var(--transition-base), padding-left var(--transition-base);
}

.mobile-nav-link::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--color-gold);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.mobile-nav-link:hover {
  color: var(--color-primary);
  padding-left: 1rem;
}

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

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-night);
  color: rgba(255, 255, 255, 0.86);
  position: relative;
}

.footer-decor {
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-primary) 0px,
    var(--color-primary) 36px,
    var(--color-gold) 36px,
    var(--color-gold) 72px,
    var(--color-bg) 72px,
    var(--color-bg) 108px,
    var(--color-sky) 108px,
    var(--color-sky) 144px
  );
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 2.5rem;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 3.5rem var(--content-pad) 3rem;
}

.footer-brand {
  padding-right: 1.5rem;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  color: var(--color-gold);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px 4px 12px 4px;
  transition: background-color var(--transition-base),
    transform var(--transition-base);
}

.footer-logo:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: rotate(-3deg);
  color: var(--color-gold);
}

.footer-logo svg {
  width: 34px;
  height: 34px;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--color-white);
  margin-bottom: 0.625rem;
}

.footer-brand-name span {
  color: var(--color-gold);
}

.footer-tagline {
  font-size: 0.875rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.6);
  max-width: 26em;
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.1em;
  margin-bottom: 1.125rem;
}

.footer-heading::before {
  content: "";
  width: 8px;
  height: 8px;
  border: 2px solid var(--color-gold);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.footer-link-list li + li {
  margin-top: 0.625rem;
}

.footer-link-list a {
  position: relative;
  display: inline-block;
  padding-left: 1rem;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.9rem;
  transition: color var(--transition-base),
    padding-left var(--transition-base);
}

.footer-link-list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  transform: translateY(-50%);
  transition: background-color var(--transition-base);
}

.footer-link-list a:hover {
  color: var(--color-gold);
  padding-left: 1.375rem;
}

.footer-link-list a:hover::before {
  background: var(--color-gold);
}

.footer-contact-line {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.72);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 1.25rem var(--content-pad);
}

.footer-bottom-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.83rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-icp {
  letter-spacing: 0.04em;
}

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.5rem;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.625rem 1rem;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.22);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease,
    visibility 0.3s ease, background-color var(--transition-base);
}

.back-to-top:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top-icon {
  font-size: 1.05rem;
  line-height: 1;
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 8px 3px 8px 3px;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: background-color var(--transition-base),
    color var(--transition-base), border-color var(--transition-base),
    transform var(--transition-base);
}

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

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

.btn-outline {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-gold {
  background: var(--color-gold);
  color: var(--color-text);
}

.btn-gold:hover {
  background: #BE9930;
  color: var(--color-white);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  padding: 1.5rem 0 0;
}

.breadcrumbs a {
  color: var(--color-text-secondary);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

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

/* ---------- 内容组件 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.75rem;
}

.chamfer-panel {
  background: var(--color-white);
  border: 1px solid rgba(0, 0, 0, 0.04);
  border-radius: 10px 2px 10px 2px;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.05);
}

/* ---------- 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .nav-main {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .header-inner {
    gap: 1rem;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .footer-brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 64px;
    --content-pad: 1rem;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .brand-mark svg {
    width: 26px;
    height: 26px;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .brand-tagline {
    display: none;
  }

  .header-actions {
    gap: 0.25rem;
  }

  .version-trigger {
    padding: 0.5rem;
  }

  .version-trigger-text {
    display: none;
  }

  .version-trigger-dot {
    width: 10px;
    height: 10px;
  }

  .version-panel {
    right: 0.75rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2.5rem var(--content-pad) 2rem;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
  }

  .section {
    padding: 3.5rem 0;
  }

  .section-heading {
    font-size: 2rem;
  }

  .back-to-top {
    right: 0.875rem;
    bottom: 0.875rem;
    padding: 0.5rem 0.75rem;
  }

  .back-to-top-label {
    display: none;
  }
}

@media (max-width: 420px) {
  .version-panel {
    position: fixed;
    top: calc(var(--header-height) + 0.5rem);
    left: 1rem;
    right: 1rem;
    width: auto;
  }

  .mobile-nav {
    padding: 1.5rem 1rem 2.5rem;
  }
}

/* ---------- Reduce 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;
    transition-delay: 0ms !important;
  }

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

  .back-to-top {
    transition: none;
  }
}