/* =========================================================
   play-j-b.com.cn 共享样式 /assets/site.css
   主题：夜间港口导航台
   ========================================================= */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, figure, blockquote, dl, dd {
  margin: 0;
}

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

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

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

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

::selection {
  background: #E3B25C;
  color: #06101A;
}

/* ---------- tokens ---------- */
:root {
  --ink-900: #0A1D30;
  --ink-850: #0B2439;
  --ink-700: #12314C;
  --ink-600: #1D4463;
  --paper: #F6EFE3;
  --paper-mute: #E4DAC8;
  --gold: #E3B25C;
  --gold-deep: #A8762F;
  --coral: #FF6A45;
  --jade: #7BC4A8;
  --mist: #9DB2C4;
  --ink-black: #06101A;

  --rule: rgba(227, 178, 92, 0.22);
  --rule-soft: rgba(157, 178, 196, 0.18);

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-ui: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --shell: 1400px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius-cut: 14px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --dur: 240ms;
}

/* ---------- base typography ---------- */
body {
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.mono {
  font-family: var(--font-mono);
  font-size: 0.82em;
  letter-spacing: 0.06em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 300;
  transform: translateY(-220%);
  padding: 12px 20px;
  background: var(--gold);
  color: var(--ink-black);
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: 2px;
  box-shadow: 0 12px 30px -12px rgba(0, 0, 0, 0.9);
  transition: transform 160ms var(--ease);
}

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

/* ---------- header shell ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, #0A1D30 0%, #0C2438 100%);
  box-shadow: 0 1px 0 rgba(227, 178, 92, 0.18), 0 24px 48px -34px rgba(0, 0, 0, 0.95);
}

/* ---------- status strip ---------- */
.status-strip {
  background: var(--ink-black);
  border-bottom: 1px solid var(--rule);
}

.status-strip__inner {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.status-strip__note {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.status-strip__dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 3px rgba(123, 196, 168, 0.18);
}

@media (prefers-reduced-motion: no-preference) {
  .status-strip__dot {
    animation: statusPulse 2600ms ease-in-out infinite;
  }
}

@keyframes statusPulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(123, 196, 168, 0.18); }
  50% { box-shadow: 0 0 0 6px rgba(123, 196, 168, 0.05); }
}

.status-strip__meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: none;
}

.status-strip__link {
  color: var(--gold);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color 140ms var(--ease);
}

.status-strip__link:hover {
  border-bottom-color: var(--gold);
}

/* ---------- header bar ---------- */
.header-bar {
  position: relative;
  border-bottom: 1px solid var(--rule);
  background: rgba(9, 26, 42, 0.94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.header-bar__inner {
  position: relative;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: 78px;
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 40px);
  transition: min-height 220ms var(--ease);
}

.site-header[data-condensed="true"] .header-bar__inner {
  min-height: 58px;
}

/* ---------- brand ---------- */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
  padding: 6px 4px 6px 0;
}

.brand__rail {
  flex: none;
  width: 3px;
  height: 36px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--gold-deep) 62%, rgba(168, 118, 47, 0) 100%);
  transform: skewY(-12deg);
  transition: height 220ms var(--ease);
}

.site-header[data-condensed="true"] .brand__rail {
  height: 28px;
}

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

.brand__cn {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.brand__en {
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-transform: uppercase;
}

/* ---------- nav toggle ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 10px 14px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--paper);
  transition: border-color 140ms var(--ease), background 140ms var(--ease);
}

.nav-toggle:hover {
  border-color: var(--gold-deep);
  background: rgba(227, 178, 92, 0.08);
}

.nav-toggle__icon {
  position: relative;
  display: block;
  width: 18px;
  height: 12px;
  flex: none;
}

.nav-toggle__icon span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gold);
  transition: transform 200ms var(--ease), opacity 140ms linear, top 200ms var(--ease);
}

.nav-toggle__icon span:nth-child(1) { top: 0; }
.nav-toggle__icon span:nth-child(2) { top: 5px; }
.nav-toggle__icon span:nth-child(3) { top: 10px; }

.header-bar[data-open] .nav-toggle__icon span:nth-child(1) {
  top: 5px;
  transform: rotate(45deg);
}

.header-bar[data-open] .nav-toggle__icon span:nth-child(2) {
  opacity: 0;
}

.header-bar[data-open] .nav-toggle__icon span:nth-child(3) {
  top: 5px;
  transform: rotate(-45deg);
}

/* ---------- primary nav ---------- */
.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(8px, 2vw, 24px);
  margin-left: auto;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0px, 1vw, 6px);
}

.primary-nav__item {
  position: relative;
}

.primary-nav__link {
  position: relative;
  display: block;
  padding: 10px 11px;
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--paper);
  transition: color 140ms var(--ease);
}

.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 3px;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 160ms var(--ease);
}

.primary-nav__link:hover {
  color: var(--gold);
}

.primary-nav__link:hover::after {
  transform: scaleX(1);
}

.primary-nav__link[aria-current="page"] {
  color: var(--gold);
}

.primary-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.primary-nav__cta {
  flex: none;
  margin-left: clamp(8px, 1.5vw, 18px);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.4;
  cursor: pointer;
  transition: background 160ms var(--ease), color 160ms var(--ease),
              border-color 160ms var(--ease), transform 160ms var(--ease);
}

.btn--primary {
  background: var(--coral);
  color: var(--ink-black);
  clip-path: polygon(0 0, calc(100% - 11px) 0, 100% 11px, 100% 100%, 11px 100%, 0 calc(100% - 11px));
  padding: 12px 22px;
}

.btn--primary:hover {
  background: #FF8564;
  transform: translateY(-1px);
}

.btn--primary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -6px;
}

.btn--ghost {
  background: transparent;
  color: var(--gold);
  border-color: var(--gold-deep);
}

.btn--ghost:hover {
  background: rgba(227, 178, 92, 0.12);
  border-color: var(--gold);
  color: var(--gold);
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 10vw, 120px);
  background: var(--ink-black);
  color: var(--paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg,
    rgba(168, 118, 47, 0) 0%,
    var(--gold-deep) 22%,
    var(--gold) 50%,
    var(--gold-deep) 78%,
    rgba(168, 118, 47, 0) 100%);
  opacity: 0.7;
}

.site-footer__inner {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) var(--gutter) 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

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

.footer-col--contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-col__title {
  position: relative;
  margin-bottom: 18px;
  padding-left: 14px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.footer-col__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--gold-deep);
  transform: rotate(45deg);
}

.footer-brand {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.footer-brand__note {
  margin-top: 14px;
  max-width: 24ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.footer-mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.footer-mono--block {
  display: block;
  margin-top: 18px;
  color: var(--paper-mute);
}

.footer-langs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.footer-langs li {
  padding: 3px 9px;
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-links a {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: var(--paper);
  transition: color 140ms var(--ease), padding-left 140ms var(--ease);
}

.footer-links a:hover {
  color: var(--gold);
  padding-left: 5px;
}

.footer-links a[aria-current="page"] {
  color: var(--gold);
}

.footer-mail {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--jade);
}

.footer-col__meta {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.footer-cta {
  margin-top: 18px;
}

.footer-bar {
  margin-top: clamp(32px, 5vw, 56px);
  padding: 20px 0 28px;
  border-top: 1px solid var(--rule-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- to top ---------- */
.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 32px);
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--ink-700);
  color: var(--gold);
  border: 1px solid var(--gold-deep);
  border-radius: 2px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 300ms var(--ease), transform 300ms var(--ease),
              visibility 300ms var(--ease), background 160ms var(--ease);
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.to-top:hover {
  background: var(--ink-600);
  color: var(--paper);
}

.to-top:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -5px;
}

.to-top__arrow {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
}

/* ---------- shared layout helpers ---------- */
.container {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose {
  max-width: 44em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--paper-mute);
}

.prose > * + * {
  margin-top: 1.1em;
}

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.prose a {
  color: var(--gold);
  border-bottom: 1px solid rgba(227, 178, 92, 0.45);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.5vw, 32px);
}

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

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

/* ---------- breadcrumb ---------- */
.breadcrumb {
  padding-top: 20px;
  font-family: var(--font-ui);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

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

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--gold-deep);
}

.breadcrumb__link {
  color: var(--mist);
  transition: color 140ms var(--ease);
}

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

.breadcrumb__item[aria-current="page"] {
  color: var(--paper);
}

/* ---------- media frame（页面阶段图片占位） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background:
    linear-gradient(140deg, var(--ink-700) 0%, var(--ink-600) 58%, var(--ink-850) 100%);
  clip-path: polygon(0 0, calc(100% - var(--radius-cut)) 0, 100% var(--radius-cut), 100% 100%, 0 100%);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(157, 178, 196, 0.12) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(157, 178, 196, 0.12) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.5;
  pointer-events: none;
}

.media-frame::after {
  content: "";
  position: absolute;
  left: -25%;
  right: -25%;
  bottom: 4%;
  height: 46%;
  background: linear-gradient(102deg,
    transparent 44%,
    rgba(227, 178, 92, 0.34) 45.4%,
    rgba(227, 178, 92, 0.06) 47%,
    transparent 48%);
  pointer-events: none;
}

.media-frame img,
.media-frame__img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

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

.media-frame--square {
  aspect-ratio: 1 / 1;
}

/* ---------- tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid rgba(123, 196, 168, 0.35);
  border-radius: 2px;
  background: rgba(123, 196, 168, 0.14);
  color: var(--jade);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

.tag--gold {
  background: rgba(227, 178, 92, 0.14);
  color: var(--gold);
  border-color: rgba(227, 178, 92, 0.36);
}

.tag--coral {
  background: rgba(255, 106, 69, 0.14);
  color: var(--coral);
  border-color: rgba(255, 106, 69, 0.38);
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 22px;
    background: var(--ink-700);
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--gold-deep);
    box-shadow: 0 32px 60px -30px rgba(0, 0, 0, 0.95);
    max-height: calc(100vh - 140px);
    overflow-y: auto;
  }

  .header-bar[data-open] .primary-nav {
    display: flex;
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .primary-nav__link {
    padding: 15px 6px;
    font-size: 16px;
    border-bottom: 1px solid var(--rule-soft);
  }

  .primary-nav__link::after {
    left: 6px;
    right: auto;
    width: 20px;
    bottom: 9px;
  }

  .primary-nav__cta {
    margin: 18px 0 0;
    width: 100%;
  }

  .header-bar__inner {
    min-height: 64px;
  }

  .site-header[data-condensed="true"] .header-bar__inner {
    min-height: 56px;
  }

  .brand__cn {
    font-size: 19px;
  }

  .brand__rail {
    height: 30px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }

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

@media (max-width: 760px) {
  body {
    font-size: 16px;
  }

  .status-strip__meta {
    display: none;
  }

  .status-strip__inner {
    justify-content: flex-start;
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-brand__note {
    max-width: none;
  }

  .footer-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .to-top {
    padding: 10px 13px;
    font-size: 12px;
  }
}

@media (max-width: 420px) {
  .brand__en {
    letter-spacing: 0.12em;
  }

  .nav-toggle__text {
    display: none;
  }
}

/* ---------- reduced motion ---------- */
@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;
  }

  .to-top {
    transform: none;
  }

  .btn--primary:hover,
  .footer-links a:hover {
    transform: none;
  }
}