/* ==========================================================================
   聚星品牌 · 共享外壳样式 /assets/site.css
   01 变量  02 Reset  03 基础排版  04 跳转链与进度  05 索引轨道头部
   06 页脚  07 通用组件  08 图片容器  09 动效  10 响应式  11 偏好降级
   ========================================================================== */

/* ---------- 01. 变量 ---------- */
:root {
  --ink: #0A1230;
  --ink-2: #101A3D;
  --core: #1B2B57;
  --white: #E9EFF7;
  --gold: #F0C24C;
  --line: #8A99B8;
  --stone: #96A3A0;
  --moss: #7C9C86;
  --clay: #B5715A;
  --paper: #F4EEE2;
  --paper-ink: #111A33;

  --rail-w: 240px;
  --gutter: clamp(18px, 4vw, 48px);
  --measure: 34em;

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

  --radius-card: 10px;
  --hair: rgba(138, 153, 184, 0.22);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 02. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

ul, ol { padding: 0; }

ul[class], ol[class], ul:not([class]), ol:not([class]) { list-style: none; }

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

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

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

hr {
  border: 0;
  height: 1px;
  background: var(--hair);
}

/* ---------- 03. 基础排版 ---------- */
body {
  margin: 0;
  padding-left: var(--rail-w);
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    linear-gradient(to right, rgba(138, 153, 184, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(138, 153, 184, 0.04) 1px, transparent 1px);
  background-size: 88px 88px;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main { display: block; }

#main-content { scroll-margin-top: 96px; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
  text-wrap: balance;
}

p, li { text-wrap: pretty; }

::selection {
  background: var(--gold);
  color: var(--ink);
}

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

/* ---------- 04. 跳转链与阅读进度 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--gold);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  border-radius: 4px 10px 4px 10px;
  transform: translateY(-160%);
  transition: transform 180ms var(--ease);
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: var(--rail-w);
  right: 0;
  height: 2px;
  z-index: 190;
  background: rgba(138, 153, 184, 0.16);
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
}

/* ---------- 05. 索引轨道头部 ---------- */
.site-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 120;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 28px 20px 24px;
  background-color: var(--ink-2);
  background-image:
    radial-gradient(circle at 0% 100%, rgba(240, 194, 76, 0.10) 0 58px, transparent 59px),
    radial-gradient(circle at 0% 100%, rgba(240, 194, 76, 0.07) 0 116px, transparent 117px);
  background-repeat: no-repeat;
  background-position: 0 100%;
  border-right: 1px solid var(--hair);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.rail-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--hair);
}

.rail-brand__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--white);
}

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

.rail-brand__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(240, 194, 76, 0.16);
}

.rail-brand__line {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.5;
  color: var(--line);
}

.rail-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 13px;
  border: 1px solid rgba(240, 194, 76, 0.45);
  border-radius: 4px 10px 4px 10px;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  line-height: 1;
}

.rail-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: background-color 200ms var(--ease);
}

.rail-toggle__bars::before,
.rail-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: transform 220ms var(--ease), top 220ms var(--ease);
}

.rail-toggle__bars::before { top: -6px; }
.rail-toggle__bars::after { top: 6px; }

.site-rail[data-open="true"] .rail-toggle__bars { background: transparent; }
.site-rail[data-open="true"] .rail-toggle__bars::before { top: 0; transform: rotate(45deg); }
.site-rail[data-open="true"] .rail-toggle__bars::after { top: 0; transform: rotate(-45deg); }

.rail-nav {
  display: flex;
  flex-direction: column;
}

.rail-nav__title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  line-height: 1.5;
  color: var(--line);
}

.rail-nav__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.rail-nav__item { display: block; }

.rail-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px 9px 34px;
  border-radius: 4px 10px 4px 10px;
  color: rgba(233, 239, 247, 0.76);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  transition: color 200ms var(--ease), background-color 200ms var(--ease);
}

.rail-nav__link::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 50%;
  width: 8px;
  height: 1px;
  background: var(--line);
  transform: translateY(-50%);
  transition: width 240ms var(--ease), background-color 240ms var(--ease);
}

.rail-nav__link:hover,
.rail-nav__link:focus-visible {
  color: var(--white);
  background: rgba(138, 153, 184, 0.10);
}

.rail-nav__link:hover::before,
.rail-nav__link:focus-visible::before {
  width: 16px;
  background: var(--gold);
}

.rail-nav__link[aria-current="page"] {
  color: var(--gold);
  background: rgba(240, 194, 76, 0.09);
  box-shadow: inset 0 0 0 1px rgba(240, 194, 76, 0.42);
}

.rail-nav__link[aria-current="page"]::before {
  width: 18px;
  background: var(--gold);
}

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

.rail-nav__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  color: var(--line);
  transition: color 200ms var(--ease);
}

.rail-nav__text { white-space: nowrap; }

.rail-nav__entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 20px;
  padding: 11px 14px;
  background: var(--gold);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  border-radius: 4px 12px 4px 12px;
  transition: background-color 200ms var(--ease), transform 200ms var(--ease);
}

.rail-nav__entry:hover,
.rail-nav__entry:focus-visible {
  background: #F7D172;
  transform: translateY(-1px);
}

.rail-nav__entry-arrow {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
}

/* ---------- 06. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-left: calc(var(--rail-w) * -1);
  margin-top: clamp(64px, 9vw, 128px);
  padding: clamp(40px, 6vw, 76px) var(--gutter) 28px;
  padding-left: calc(var(--rail-w) + var(--gutter));
  background: var(--ink-2);
  border-top: 1px solid var(--hair);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -190px;
  right: -130px;
  width: 440px;
  height: 440px;
  border: 1px solid rgba(240, 194, 76, 0.14);
  border-radius: 50%;
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  top: -100px;
  right: -44px;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(240, 194, 76, 0.09);
  border-radius: 50%;
  pointer-events: none;
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: clamp(26px, 3.4vw, 52px);
  max-width: 1180px;
  align-items: start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 260px;
}

.footer-brand__link {
  font-family: var(--font-display);
  font-size: clamp(24px, 2.4vw, 30px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--white);
}

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

.footer-brand__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  line-height: 1.6;
  color: var(--gold);
}

.footer-brand__note {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--line);
}

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

.footer-col__title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1.4;
  color: var(--gold);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col__list a {
  font-size: 14.5px;
  line-height: 1.6;
  color: rgba(233, 239, 247, 0.78);
  transition: color 180ms var(--ease), padding-left 180ms var(--ease);
}

.footer-col__list a:hover,
.footer-col__list a:focus-visible {
  color: var(--gold);
  padding-left: 4px;
}

.footer-contact__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-contact__row {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  line-height: 1.4;
  color: var(--line);
}

.footer-contact__value {
  font-size: 14.5px;
  line-height: 1.55;
  color: rgba(233, 239, 247, 0.88);
  overflow-wrap: anywhere;
}

.footer-contact__note {
  margin-top: 14px;
  padding-left: 10px;
  border-left: 2px solid var(--clay);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--line);
}

.footer-legal {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 26px;
  max-width: 1180px;
  margin-top: clamp(30px, 4vw, 56px);
  padding-top: 20px;
  border-top: 1px solid rgba(138, 153, 184, 0.18);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--line);
}

.footer-legal__icp {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

.footer-legal__copy { color: rgba(138, 153, 184, 0.9); }

/* ---------- 07. 通用组件 ---------- */
.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(56px, 8vw, 104px); }
.section--tight { padding-block: clamp(36px, 5vw, 64px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  line-height: 1.4;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.title-xl {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 6vw, 76px);
  letter-spacing: -0.02em;
  line-height: 1.02;
  color: var(--white);
}

.title-lg {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 42px);
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--white);
}

.lede {
  max-width: var(--measure);
  font-size: 17px;
  line-height: 1.78;
  color: rgba(233, 239, 247, 0.82);
}

.prose {
  max-width: var(--measure);
  font-size: 16.5px;
  line-height: 1.78;
  color: rgba(233, 239, 247, 0.86);
}

.prose p + p { margin-top: 1em; }
.prose strong { color: var(--gold); font-weight: 700; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

.index-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 4px 12px 4px 12px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  transition: background-color 200ms var(--ease), color 200ms var(--ease),
    border-color 200ms var(--ease), transform 200ms var(--ease);
}

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

.btn--gold:hover,
.btn--gold:focus-visible {
  background: #F7D172;
  transform: translateY(-1px);
}

.btn--ghost {
  border-color: rgba(138, 153, 184, 0.5);
  color: var(--white);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
}

.btn--small {
  padding: 9px 16px;
  font-size: 13.5px;
}

.card {
  background: var(--core);
  border: 1px solid var(--hair);
  border-radius: var(--radius-card);
  padding: clamp(18px, 2.4vw, 28px);
}

.card--cut { border-radius: 4px 14px 4px 14px; }

.card--paper {
  background: var(--paper);
  color: var(--paper-ink);
  border-color: transparent;
}

.card--paper .title-lg,
.card--paper .title-xl { color: var(--paper-ink); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--line);
}

.breadcrumb a {
  color: var(--line);
  transition: color 180ms var(--ease);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible { color: var(--gold); }

.breadcrumb__sep { color: rgba(138, 153, 184, 0.5); }

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

.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 28px);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* ---------- 08. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid rgba(138, 153, 184, 0.20);
  border-radius: var(--radius-card);
  background-color: var(--ink-2);
  background-image:
    linear-gradient(to right, rgba(138, 153, 184, 0.10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(138, 153, 184, 0.10) 1px, transparent 1px);
  background-size: 32px 32px;
}

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

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

.media__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  padding: 3px 8px;
  background: rgba(10, 18, 48, 0.72);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--line);
}

/* ---------- 09. 动效 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 480ms var(--ease), transform 480ms var(--ease);
}

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1180px) {
  .footer-grid { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
}

@media (max-width: 900px) {
  :root { --rail-w: 0px; }

  body {
    padding-left: 0;
    font-size: 16px;
    background-size: 64px 64px;
  }

  .scroll-progress { left: 0; }

  .site-rail {
    position: sticky;
    top: 0;
    bottom: auto;
    left: auto;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 12px var(--gutter);
    border-right: 0;
    border-bottom: 1px solid var(--hair);
    background-image: none;
    background-color: rgba(16, 26, 61, 0.97);
    overflow: visible;
    z-index: 140;
  }

  .rail-brand {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .rail-brand__link { font-size: 22px; }
  .rail-brand__dot { width: 6px; height: 6px; box-shadow: 0 0 0 3px rgba(240, 194, 76, 0.16); }
  .rail-brand__line { display: none; }

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

  .rail-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 86vw);
    padding: 86px 22px 32px;
    background: var(--ink-2);
    border-left: 1px solid rgba(240, 194, 76, 0.24);
    overflow-y: auto;
    overscroll-behavior: contain;
    z-index: 130;
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 260ms var(--ease), opacity 200ms var(--ease),
      visibility 0s linear 260ms;
  }

  .site-rail[data-open="true"] .rail-nav {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    transition: transform 260ms var(--ease), opacity 200ms var(--ease),
      visibility 0s linear 0s;
  }

  .rail-nav__link {
    font-size: 16px;
    padding: 12px 12px 12px 36px;
  }

  .rail-nav__entry { margin-top: 26px; }

  .site-footer {
    margin-left: 0;
    margin-top: clamp(48px, 10vw, 88px);
    padding-left: var(--gutter);
  }

  .site-footer::before,
  .site-footer::after { opacity: 0.6; }

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

  #main-content { scroll-margin-top: 72px; }
}

@media (max-width: 540px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-legal { flex-direction: column; align-items: flex-start; gap: 8px; }
  .title-xl { font-size: clamp(32px, 10vw, 48px); }
}

/* ---------- 11. 偏好降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .rail-nav__entry:hover,
  .rail-nav__entry:focus-visible,
  .btn--gold:hover,
  .btn--gold:focus-visible { transform: none; }
}