/* ============================================================
   巨星CN中文站 · 共享样式表 /assets/site.css
   母题：夜间海港信号塔
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

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

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

/* ---------- 2. Tokens ---------- */
:root {
  --ink:        #071A2B;
  --ink-deep:   #040E16;
  --teal:       #0B2E33;
  --indigo:     #1B1F4B;
  --wine:       #3A1226;
  --cyan:       #25E6D5;
  --coral:      #FF6B4A;
  --gold:       #D8B36A;
  --paper:      #EAF4F6;
  --muted:      #A9C3C9;
  --line:       #1E4552;
  --cream:      #F4EEE4;
  --on-cyan:    #04222B;

  --rail-w: 272px;
  --gutter: clamp(18px, 4vw, 56px);
  --radius: 14px;

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

  --ease: cubic-bezier(.22, .68, .36, 1);
}

/* ---------- 3. Base / 中文排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(1200px 600px at 92% -10%, rgba(37, 230, 213, .09), transparent 62%),
    radial-gradient(900px 520px at -10% 12%, rgba(255, 107, 74, .07), transparent 58%);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.is-nav-open { overflow: hidden; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -.02em;
  color: var(--paper);
}

p { max-width: 68ch; }

::selection {
  background: var(--cyan);
  color: var(--on-cyan);
}

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 4. 通用容器与排版件 ---------- */
.wrap {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .24em;
  line-height: 1.6;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  flex: 0 0 auto;
  background: currentColor;
  opacity: .75;
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line);
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .04em;
  text-align: center;
  cursor: pointer;
  transition:
    transform 180ms var(--ease),
    background-color 180ms var(--ease),
    border-color 180ms var(--ease),
    box-shadow 180ms var(--ease),
    color 180ms var(--ease);
}

.btn--accent {
  background: var(--cyan);
  color: var(--on-cyan);
  box-shadow: 0 10px 26px rgba(37, 230, 213, .22);
}

.btn--accent:hover {
  background: #4BF0E2;
  transform: translateY(-1px);
  box-shadow: 0 14px 32px rgba(37, 230, 213, .3);
}

.btn--ghost {
  border-color: rgba(37, 230, 213, .42);
  background: rgba(37, 230, 213, .06);
  color: var(--cyan);
}

.btn--ghost:hover {
  background: rgba(37, 230, 213, .14);
  border-color: rgba(37, 230, 213, .7);
}

.btn--coral {
  background: var(--coral);
  color: #2A0B03;
  box-shadow: 0 10px 26px rgba(255, 107, 74, .24);
}

.btn--coral:hover { background: #FF856A; transform: translateY(-1px); }

.btn--block { width: 100%; }

/* ---------- 6. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 10px;
  color: rgba(30, 69, 82, .95);
}

.breadcrumb a {
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.breadcrumb a:hover {
  color: var(--cyan);
  border-bottom-color: currentColor;
}

/* ---------- 7. 图片容器（页面阶段放置占位） ---------- */
.media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(11, 46, 51, .92), rgba(27, 31, 75, .55));
  box-shadow: inset 0 1px 0 rgba(216, 179, 106, .12);
}

.media > img,
.media > svg,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide     { aspect-ratio: 21 / 9; }
.media--portrait { aspect-ratio: 3 / 4; }
.media--square   { aspect-ratio: 1 / 1; }

/* ============================================================
   8. 页头
   ============================================================ */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--cyan);
  color: var(--on-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  transform: translateY(-180%);
  transition: transform 200ms var(--ease);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: #06141E;
  border-bottom: 1px solid var(--line);
}

.header-bar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px var(--gutter) 14px;
}

/* --- 品牌 --- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 30px;
  background: linear-gradient(180deg, var(--cyan) 0%, #10857F 62%, #0B5F5C 100%);
  clip-path: polygon(50% 0, 100% 26%, 82% 100%, 18% 100%, 0 26%);
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: 5px;
  left: 50%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  transform: translateX(-50%);
  box-shadow:
    0 0 0 3px rgba(216, 179, 106, .22),
    0 0 12px rgba(216, 179, 106, .7);
  animation: beacon-pulse 3.6s var(--ease) infinite;
}

@keyframes beacon-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(216, 179, 106, .22), 0 0 12px rgba(216, 179, 106, .7); }
  50%      { box-shadow: 0 0 0 6px rgba(216, 179, 106, .1),  0 0 20px rgba(216, 179, 106, .9); }
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.15;
}

.brand-text__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -.03em;
  color: var(--paper);
  white-space: nowrap;
}

.brand-text__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --- 移动菜单按钮 --- */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  padding: 9px 15px;
  border: 1px solid rgba(37, 230, 213, .34);
  border-radius: 999px;
  background: rgba(37, 230, 213, .06);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .14em;
  cursor: pointer;
  transition: background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.nav-toggle:hover { background: rgba(37, 230, 213, .14); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 12px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: top 200ms var(--ease), transform 200ms var(--ease);
}

.nav-toggle__bars::before { top: 2px; }
.nav-toggle__bars::after  { top: 8px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 5px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 5px;
  transform: rotate(-45deg);
}

.nav-toggle__text { line-height: 1; }

/* --- 导航面板（移动 = 抽屉） --- */
.site-nav {
  position: fixed;
  inset: 0 0 0 auto;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
  width: min(85vw, 380px);
  padding: 78px 24px 30px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background:
    radial-gradient(520px 260px at 100% 0%, rgba(37, 230, 213, .16), transparent 66%),
    linear-gradient(180deg, #08202E 0%, #05131C 100%);
  border-left: 1px solid var(--line);
  box-shadow: -26px 0 64px rgba(0, 0, 0, .55);
  transform: translateX(104%);
  transition: transform 300ms var(--ease);
}

.site-nav[data-open] { transform: translateX(0); }

.site-nav__eyebrow {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .3em;
  color: var(--gold);
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.site-nav__item { display: block; }

.site-nav__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 12px 10px 14px;
  border-left: 2px solid transparent;
  border-radius: 10px;
  color: var(--paper);
  font-size: 15px;
  line-height: 1.6;
  transition:
    background-color 180ms var(--ease),
    border-color 180ms var(--ease),
    color 180ms var(--ease);
}

.site-nav__num {
  flex: 0 0 auto;
  min-width: 2.2ch;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--muted);
  transition: color 180ms var(--ease);
}

.site-nav__label { flex: 1 1 auto; }

.site-nav__link:hover,
.site-nav__link:focus-visible {
  background: rgba(37, 230, 213, .09);
  border-left-color: rgba(37, 230, 213, .55);
}

.site-nav__link:hover .site-nav__num { color: var(--cyan); }

.site-nav__link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(37, 230, 213, .18), rgba(37, 230, 213, 0));
  border-left-color: var(--cyan);
  color: #FFFFFF;
  font-weight: 700;
}

.site-nav__link[aria-current="page"] .site-nav__num { color: var(--cyan); }

.site-nav__link[aria-current="page"] .site-nav__label::after {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-left: 10px;
  border-radius: 50%;
  background: var(--gold);
  vertical-align: middle;
}

.site-nav__cta {
  width: 100%;
  margin-top: 4px;
}

.site-nav__hint {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(30, 69, 82, .7);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .1em;
  line-height: 1.9;
  color: rgba(169, 195, 201, .72);
}

/* --- 遮罩 --- */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 0;
  padding: 0;
  background: rgba(2, 10, 16, .78);
  opacity: 0;
  visibility: hidden;
  cursor: pointer;
  transition: opacity 260ms var(--ease), visibility 260ms;
}

.nav-scrim[data-open] {
  opacity: 1;
  visibility: visible;
}

/* --- 阅读进度 --- */
.rail-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  height: 2px;
  background: rgba(30, 69, 82, .55);
  overflow: hidden;
}

.rail-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan) 55%, var(--gold) 100%);
}

/* ============================================================
   9. 页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 104px);
  background:
    radial-gradient(760px 340px at 10% 0%, rgba(27, 31, 75, .9), transparent 72%),
    radial-gradient(620px 300px at 100% 100%, rgba(58, 18, 38, .55), transparent 70%),
    linear-gradient(180deg, #08161F 0%, #040D14 100%);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--gold) 50%, transparent 100%);
  opacity: .5;
}

.footer-inner {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding: clamp(40px, 5vw, 64px) var(--gutter) 28px;
}

.footer-top {
  display: grid;
  gap: 36px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.brand--footer .brand-text__name { font-size: 20px; }

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

.footer-brand__line {
  max-width: 34ch;
  font-family: var(--font-serif);
  font-size: 13.5px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .02em;
  color: rgba(169, 195, 201, .82);
}

.footer-brand__line:first-of-type {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
  opacity: .85;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 26px 20px;
  min-width: 0;
}

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

.footer-nav__title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .26em;
  line-height: 1.6;
  color: var(--gold);
}

.footer-nav__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-nav__list a {
  display: inline-block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  border-bottom: 1px solid transparent;
  transition: color 170ms var(--ease), border-color 170ms var(--ease), transform 170ms var(--ease);
}

.footer-nav__list a:hover,
.footer-nav__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: rgba(37, 230, 213, .6);
  transform: translateX(2px);
}

.footer-contact {
  display: grid;
  gap: 10px;
  margin-top: clamp(30px, 4vw, 46px);
  padding-top: 22px;
  border-top: 1px solid rgba(30, 69, 82, .65);
}

.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(234, 244, 246, .9);
}

.footer-contact__key {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--gold);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(30, 69, 82, .45);
  font-size: 12.5px;
  line-height: 1.75;
}

.footer-bottom__legal {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: rgba(169, 195, 201, .78);
}

.footer-bottom__meta {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .05em;
  color: rgba(169, 195, 201, .62);
}

.to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  padding: 8px 15px;
  border: 1px solid rgba(37, 230, 213, .3);
  border-radius: 999px;
  background: rgba(37, 230, 213, .07);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition:
    opacity 220ms var(--ease),
    transform 220ms var(--ease),
    visibility 220ms,
    background-color 180ms var(--ease);
}

.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover { background: rgba(37, 230, 213, .16); }

/* ============================================================
   10. 平板
   ============================================================ */
@media (min-width: 700px) {
  .footer-top {
    grid-template-columns: minmax(220px, 1fr) 1.6fr;
    gap: 44px;
  }

  .footer-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 26px;
  }
}

@media (min-width: 900px) {
  .footer-contact { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ============================================================
   11. 桌面：侧边轨道系统
   ============================================================ */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }

  .site-header {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 80;
    display: flex;
    flex-direction: column;
    width: var(--rail-w);
    padding: 26px 20px 22px;
    background:
      radial-gradient(460px 260px at 0% 0%, rgba(37, 230, 213, .12), transparent 68%),
      linear-gradient(180deg, #071E2B 0%, #05141E 58%, #071A2B 100%);
    border-bottom: 0;
    border-right: 1px solid var(--line);
    box-shadow: 18px 0 48px rgba(0, 0, 0, .28);
  }

  .header-bar {
    display: block;
    padding: 0 0 20px;
    border-bottom: 1px solid rgba(30, 69, 82, .75);
  }

  .brand-mark { width: 28px; height: 32px; }

  .brand-text__name { font-size: 21px; }

  .nav-toggle { display: none; }

  .nav-scrim { display: none; }

  .site-nav {
    position: static;
    inset: auto;
    flex: 1 1 auto;
    width: auto;
    padding: 22px 0 0;
    overflow: visible;
    background: none;
    border: 0;
    box-shadow: none;
    transform: none;
    transition: none;
  }

  .site-nav__eyebrow { letter-spacing: .28em; }

  .site-nav__link {
    padding: 9px 10px 9px 12px;
    font-size: 14px;
  }

  .site-nav__num { min-width: 2.4ch; font-size: 10.5px; }

  .site-nav__cta {
    margin-top: 10px;
    padding: 11px 18px;
    font-size: 13px;
  }

  .site-nav__hint { font-size: 10px; }

  .rail-progress { height: 2px; }

  .footer-inner { padding-inline: clamp(28px, 4vw, 64px); }

  .footer-top { grid-template-columns: minmax(240px, .85fr) 1.9fr; gap: 56px; }
}

@media (min-width: 1280px) {
  .site-nav__link { font-size: 14.5px; }
  .footer-inner { max-width: 1240px; }
}

/* ============================================================
   12. 减少动态
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }

  .site-nav { transition: none; }
  .brand-mark::after { animation: none; }
}