/* ===========================================================
   365 棋牌电玩 · /assets/site.css
   暗场霓虹 / 牌面切角 / 坐标编号系统 —— 共享外壳与基础组件
   =========================================================== */

:root {
  --ink-abyss: #0a1420;
  --ink-mid: #122236;
  --ink-soft: #1b3149;
  --neon: #37e6d4;
  --coral: #ff6b4a;
  --gold: #e8b85c;
  --paper: #f2f5f7;
  --mist: #9fb2c4;
  --teal-dim: #1f5e63;
  --ember-dim: #5b2e22;
  --tick: #4fd08a;

  --edge: rgba(159, 178, 196, 0.18);
  --edge-strong: rgba(159, 178, 196, 0.34);
  --neon-soft: rgba(55, 230, 212, 0.12);
  --gold-soft: rgba(232, 184, 92, 0.32);
  --glow-neon: 0 0 18px rgba(55, 230, 212, 0.28);
  --shadow-card: 0 2px 18px rgba(0, 0, 0, 0.45);
  --shadow-lift: 0 10px 28px rgba(0, 0, 0, 0.55);

  --cut: 14px;
  --cut-sm: 10px;
  --pill: 999px;

  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas,
    "Liberation Mono", "Noto Sans Mono CJK SC", monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --shell: min(1240px, calc(100% - 48px));
}

/* ---------- reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background-color: var(--ink-abyss);
  background-image: radial-gradient(680px 420px at 88% -6%, rgba(55, 230, 212, 0.1), transparent 70%),
    radial-gradient(560px 400px at 4% 4%, rgba(255, 107, 74, 0.07), transparent 72%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

[hidden] {
  display: none !important;
}

img,
svg,
picture {
  max-width: 100%;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

figure {
  margin: 0;
}

/* ---------- 中文排版 ---------- */
h1,
h2,
h3,
h4 {
  margin: 0 0 0.55em;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.18;
  color: var(--paper);
}

h1 {
  font-size: clamp(32px, 5vw, 64px);
}

h2 {
  font-size: clamp(24px, 3.2vw, 36px);
}

h3 {
  font-size: clamp(18px, 2vw, 22px);
}

h4 {
  font-size: 16px;
  letter-spacing: 0;
}

p {
  margin: 0 0 1em;
  max-width: 68ch;
}

p:last-child {
  margin-bottom: 0;
}

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

strong {
  font-weight: 700;
  color: var(--paper);
}

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 4px;
}

#main-content {
  display: block;
  scroll-margin-top: 120px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 跳转链接 / 进度条 ---------- */
.skip-link {
  position: fixed;
  top: -96px;
  left: 16px;
  z-index: 120;
  padding: 10px 18px;
  border-radius: 6px;
  background: var(--neon);
  color: #04201d;
  font-weight: 700;
  font-size: 14px;
  transition: top 0.18s var(--ease);
}

.skip-link:focus {
  top: 12px;
}

.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--neon), var(--gold) 55%, var(--coral));
  z-index: 110;
  pointer-events: none;
}

/* ---------- 容器与区块 ---------- */
.container {
  width: var(--shell);
  margin-inline: auto;
}

.section {
  padding-block: 72px;
}

.section--midtone {
  background: linear-gradient(180deg, rgba(18, 34, 54, 0.92), rgba(10, 20, 32, 0));
  border-top: 1px solid var(--edge);
}

.page-head {
  padding-block: 56px 32px;
}

.eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--neon);
}

.display-title {
  max-width: 22ch;
  text-wrap: balance;
}

.outline-365 {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.6em;
  line-height: 0.9;
  color: rgba(232, 184, 92, 0.14);
  -webkit-text-stroke: 1.5px var(--gold);
  paint-order: stroke fill;
}

.lede {
  max-width: 60ch;
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--mist);
}

.note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.mono-code {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.code-prefix {
  color: var(--gold);
}

.slant-divider {
  height: 1px;
  margin-block: 40px;
  background: linear-gradient(90deg, transparent, var(--edge-strong) 22%, var(--teal-dim) 78%, transparent);
  transform: rotate(-0.6deg);
  transform-origin: left center;
}

/* ---------- 栅格 ---------- */
.grid {
  display: grid;
  gap: 24px;
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--rail {
  grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
  align-items: start;
  gap: 40px;
}

.rail {
  border-left: 1px solid var(--edge);
  padding-left: 20px;
}

.rail-label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  background: transparent;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  text-align: center;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
    background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.btn-action {
  border-radius: 2px;
  background: linear-gradient(135deg, var(--coral), #e14e2f);
  color: #1a0c07;
  box-shadow: 0 6px 20px rgba(255, 107, 74, 0.28);
  clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% calc(100% - var(--cut-sm)),
      calc(100% - var(--cut-sm)) 100%, 0 100%, 0 var(--cut-sm));
}

.btn-action:hover,
.btn-action:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(255, 107, 74, 0.4);
}

.btn-ghost {
  border-color: var(--edge-strong);
  color: var(--paper);
  background: rgba(27, 49, 73, 0.4);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--neon);
  color: var(--neon);
  box-shadow: var(--glow-neon);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
}

/* ---------- 头部：悬浮胶囊浮岛 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: 14px 0 0;
}

.header-shell {
  display: block;
}

.nav-capsule {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 12px 10px 18px;
  border: 1px solid var(--edge);
  border-radius: var(--pill);
  background: rgba(18, 34, 54, 0.86);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  transition: padding 0.22s var(--ease), background-color 0.22s var(--ease),
    border-color 0.22s var(--ease);
}

.site-header[data-scrolled] .nav-capsule {
  padding: 6px 10px 6px 14px;
  background: rgba(10, 20, 32, 0.95);
  border-color: rgba(55, 230, 212, 0.22);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--paper);
  flex: 0 0 auto;
}

.brand-mark {
  display: inline-block;
  padding: 3px 7px;
  border: 1px solid var(--gold-soft);
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: rgba(232, 184, 92, 0.18);
  -webkit-text-stroke: 1.1px var(--gold);
  paint-order: stroke fill;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.primary-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
}

.nav-item {
  flex: 0 0 auto;
}

.nav-link {
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--pill);
  color: var(--mist);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease),
    box-shadow 0.18s var(--ease);
}

.nav-link:hover {
  color: var(--paper);
  background: rgba(55, 230, 212, 0.08);
}

.nav-link[aria-current="page"] {
  color: var(--neon);
  background: var(--neon-soft);
  box-shadow: inset 0 0 0 1px rgba(55, 230, 212, 0.36), var(--glow-neon);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.header-cta {
  padding: 9px 16px;
  font-size: 13px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  padding: 0 10px;
  border: 1px solid var(--edge-strong);
  border-radius: 8px;
  background: rgba(27, 49, 73, 0.6);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--paper);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(5.5px) 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(-5.5px) rotate(-45deg);
}

/* ---------- 卡片 / 标签 / 筛选 ---------- */
.card {
  position: relative;
  padding: 22px;
  border: 1px solid var(--edge);
  background: rgba(18, 34, 54, 0.86);
  box-shadow: var(--shadow-card);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%,
      var(--cut) 100%, 0 calc(100% - var(--cut)));
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.card--cut:hover,
.card--cut:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: rgba(55, 230, 212, 0.45);
}

.card-title {
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.card-meta {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.card-body {
  font-size: 15px;
  color: var(--mist);
}

.tag {
  display: inline-block;
  padding: 3px 8px;
  border: 1px solid var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tick);
  box-shadow: 0 0 8px var(--tick);
  vertical-align: middle;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.chip {
  padding: 8px 14px;
  border: 1px solid var(--edge-strong);
  border-radius: var(--pill);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease),
    border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.chip:hover {
  color: var(--paper);
  border-color: var(--neon);
}

.chip[aria-pressed="true"] {
  color: #04201d;
  background: var(--neon);
  border-color: var(--neon);
  box-shadow: var(--glow-neon);
}

[data-copied="true"] {
  background: var(--gold) !important;
  color: #241703 !important;
  transition: background-color 0.18s var(--ease);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  margin-bottom: 18px;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

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

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--teal-dim);
}

.breadcrumb-link {
  color: var(--mist);
}

.breadcrumb-link:hover,
.breadcrumb-link:focus-visible {
  color: var(--neon);
}

.breadcrumb-current {
  color: var(--gold);
}

/* ---------- 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: var(--media-ratio, 16 / 9);
  border: 1px solid var(--edge);
  background: var(--ink-mid);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%,
      var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 42%, rgba(10, 20, 32, 0.72));
  pointer-events: none;
}

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

.media-frame--card {
  --media-ratio: 4 / 3;
}

.media-frame--tall {
  --media-ratio: 3 / 4;
}

.media-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.media-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: 96px;
  padding: 64px 0 28px;
  border-top: 1px solid var(--edge);
  background: linear-gradient(180deg, #0a1420 0%, #0c1927 38%, #0a1420 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -140px;
  width: 460px;
  height: 320px;
  background: radial-gradient(closest-side, rgba(255, 107, 74, 0.16), transparent 72%);
  pointer-events: none;
}

.footer-slant {
  position: absolute;
  top: 0;
  right: 6%;
  width: 200px;
  height: 100%;
  background: repeating-linear-gradient(70deg, rgba(55, 230, 212, 0.12) 0 1px, transparent 1px 14px);
  pointer-events: none;
}

.footer-shell {
  position: relative;
  z-index: 1;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.6fr) minmax(0, 1.15fr);
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--edge);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.footer-mark {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: rgba(232, 184, 92, 0.12);
  -webkit-text-stroke: 1.5px var(--gold);
  paint-order: stroke fill;
}

.footer-brand-line {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.footer-coords {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

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

.footer-col-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-link {
  display: inline-block;
  padding: 4px 0;
  color: var(--mist);
  font-size: 14px;
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--neon);
  transform: translateX(3px);
}

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

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-contact-row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.footer-contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--teal-dim);
  text-transform: uppercase;
}

.footer-contact-value {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.footer-note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--edge);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 22px;
}

.footer-legal,
.footer-icp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.footer-icp {
  color: var(--gold);
}

/* ---------- 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

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

/* ---------- 响应式：平板 ---------- */
@media (max-width: 1080px) {
  .nav-link {
    padding: 8px 9px;
    font-size: 13px;
  }

  .grid--rail {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .rail {
    border-left: 0;
    border-top: 1px solid var(--edge);
    padding-left: 0;
    padding-top: 16px;
  }

  .footer-top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px;
  }

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

/* ---------- 响应式：移动导航 ---------- */
@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-capsule {
    padding: 8px 10px 8px 14px;
    gap: 10px;
  }

  .primary-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: block;
    padding: 12px;
    border: 1px solid var(--edge-strong);
    border-radius: 16px;
    background: rgba(10, 20, 32, 0.98);
    box-shadow: var(--shadow-lift);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s var(--ease);
  }

  .primary-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-link {
    display: block;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 15px;
  }

  .nav-link[aria-current="page"] {
    box-shadow: inset 0 0 0 1px rgba(55, 230, 212, 0.4);
  }
}

/* ---------- 响应式：手机 ---------- */
@media (max-width: 640px) {
  :root {
    --shell: calc(100% - 32px);
    --cut: 11px;
  }

  body {
    font-size: 16px;
  }

  .section {
    padding-block: 48px;
  }

  .page-head {
    padding-block: 36px 24px;
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .brand-sub {
    display: none;
  }

  .brand-mark {
    font-size: 13px;
  }

  .header-cta {
    padding: 8px 12px;
    font-size: 12px;
  }

  .footer-top {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .footer-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

@media (max-width: 380px) {
  .brand-name {
    font-size: 13px;
  }
}

/* ---------- 降低动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .card--cut:hover,
  .card--cut:focus-within,
  .btn-action:hover,
  .btn-action:focus-visible,
  .footer-link:hover,
  .footer-link:focus-visible {
    transform: none;
  }
}