/* ==========================================================================
   经典指南 · 共享样式表 /assets/site.css
   框架式导航 + 目录型内容地图 + 深蓝金刻度色彩体系
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  /* 色彩 */
  --cg-navy: #0A2A4A;
  --cg-navy-2: #123A5E;
  --cg-navy-3: #0E3255;
  --cg-shell: #F6F1E7;
  --cg-paper: #FFFFFF;
  --cg-gold: #D4AF37;
  --cg-gold-soft: #E9DCC3;
  --cg-celadon: #5F9EA0;
  --cg-pink: #E6B8B8;
  --cg-ink: #1C1C1C;
  --cg-body-ink: #3A4450;
  --cg-muted: #6B7280;

  --cg-line: rgba(10, 42, 74, .16);
  --cg-line-soft: rgba(10, 42, 74, .08);
  --cg-line-inverse: rgba(246, 241, 231, .18);

  /* 字体 */
  --cg-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --cg-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --cg-mono: "SFMono-Regular", "JetBrains Mono", "Consolas", "Menlo", "Courier New", monospace;

  /* 尺寸 */
  --cg-rail: 17rem;
  --cg-max: 1440px;
  --cg-gutter: clamp(1.15rem, 4vw, 4rem);
  --cg-radius-s: 3px;
  --cg-radius-m: 8px;
  --cg-radius-l: 16px;
  --cg-shadow-s: 0 1px 2px rgba(10, 42, 74, .05), 0 8px 20px -14px rgba(10, 42, 74, .3);
  --cg-shadow-m: 0 2px 4px rgba(10, 42, 74, .06), 0 20px 40px -24px rgba(10, 42, 74, .38);

  /* 排版比例 */
  --cg-h1: clamp(2.25rem, 6vw, 5.5rem);
  --cg-h2: clamp(1.65rem, 3vw, 2.75rem);
  --cg-h3: clamp(1.15rem, 1.7vw, 1.4rem);
  --cg-body: clamp(1rem, 1.05vw, 1.0625rem);
}

@media (min-width: 1080px) {
  :root { --cg-rail: 15.5rem; }
}
@media (min-width: 1280px) {
  :root { --cg-rail: 17.5rem; }
}

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background-color: var(--cg-shell);
  background-image:
    radial-gradient(96% 58% at 100% 0%, rgba(212, 175, 55, .08), transparent 62%),
    radial-gradient(78% 52% at 0% 100%, rgba(95, 158, 160, .1), transparent 66%);
  color: var(--cg-ink);
  font-family: var(--cg-sans);
  font-size: var(--cg-body);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ol, ul {
  padding: 0;
  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 {
  display: block;
  max-width: 100%;
}

table { border-collapse: collapse; }

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

::selection {
  background: rgba(212, 175, 55, .34);
  color: var(--cg-navy);
}

/* ---------- 3. 中文排版基线 ---------- */
h1, h2, h3, h4 {
  font-family: var(--cg-serif);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -0.012em;
  color: var(--cg-navy);
}

h1 { font-size: var(--cg-h1); line-height: 1.08; }
h2 { font-size: var(--cg-h2); }
h3 { font-size: var(--cg-h3); line-height: 1.34; }

.cg-lead {
  font-size: clamp(1.02rem, 1.35vw, 1.2rem);
  line-height: 1.86;
  color: var(--cg-body-ink);
  max-width: 62ch;
}

.cg-num {
  font-family: var(--cg-serif);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

.cg-muted { color: var(--cg-muted); }

#main-content { scroll-margin-top: 5.5rem; }

/* ---------- 4. 跳转链接 ---------- */
.cg-skip {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  display: inline-block;
  padding: .78rem 1.35rem;
  background: var(--cg-gold);
  color: #10283f;
  font-size: .88rem;
  font-weight: 600;
  letter-spacing: .06em;
  border-radius: 0 0 var(--cg-radius-s) 0;
  transform: translateY(-130%);
  transition: transform .2s ease;
}

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

/* ---------- 5. 框架头部 ---------- */
.cg-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background-image: linear-gradient(168deg, #0A2A4A 0%, #0E3255 58%, #123A5E 100%);
  color: var(--cg-shell);
  border-bottom: 1px solid rgba(212, 175, 55, .38);
  box-shadow: 0 12px 32px -24px rgba(10, 42, 74, .95);
}

.cg-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem 1rem;
  padding: .85rem clamp(1rem, 4vw, 1.5rem);
}

/* 品牌 */
.cg-brand {
  display: flex;
  align-items: center;
  gap: .7rem;
  min-width: 0;
  color: inherit;
}

.cg-brand__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid rgba(212, 175, 55, .55);
  border-radius: 2px;
  color: var(--cg-gold);
  transition: border-color .2s ease, transform .25s ease;
}

.cg-brand__mark svg { width: 1.4rem; height: 1.4rem; }

.cg-brand:hover .cg-brand__mark,
.cg-brand:focus-visible .cg-brand__mark {
  border-color: var(--cg-gold);
  transform: rotate(-6deg);
}

.cg-brand__text {
  display: flex;
  flex-direction: column;
  gap: .1rem;
  min-width: 0;
}

.cg-brand__name {
  font-family: var(--cg-serif);
  font-size: 1.24rem;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: .1em;
  color: #FFFFFF;
}

.cg-brand__line {
  font-size: .68rem;
  line-height: 1.4;
  letter-spacing: .05em;
  color: rgba(246, 241, 231, .56);
}

/* 移动开关 */
.cg-nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin-left: auto;
  padding: .5rem .75rem;
  border: 1px solid rgba(246, 241, 231, .28);
  border-radius: var(--cg-radius-s);
  color: var(--cg-shell);
  font-size: .8rem;
  letter-spacing: .14em;
  transition: border-color .18s ease, background-color .18s ease, color .18s ease;
}

.cg-nav-toggle:hover,
.cg-nav-toggle:focus-visible {
  border-color: var(--cg-gold);
  color: #FFFFFF;
  background: rgba(246, 241, 231, .06);
}

.cg-nav-toggle__bars {
  position: relative;
  display: block;
  width: 1rem;
  height: 1px;
  background: var(--cg-gold);
  transition: background-color .2s ease;
}

.cg-nav-toggle__bars::before,
.cg-nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  display: block;
  width: 1rem;
  height: 1px;
  background: var(--cg-gold);
  transition: transform .22s ease;
}

.cg-nav-toggle__bars::before { top: -5px; }
.cg-nav-toggle__bars::after { top: 5px; }

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

.cg-header[data-open] .cg-nav-toggle__bars { background: transparent; }
.cg-header[data-open] .cg-nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.cg-header[data-open] .cg-nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

/* 导航 */
.cg-nav {
  display: none;
  flex: 1 1 100%;
  width: 100%;
  min-width: 0;
}

.cg-header[data-open] .cg-nav { display: block; }

.cg-nav__eyebrow {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .5rem;
  padding-bottom: .55rem;
  margin-bottom: .2rem;
  border-bottom: 1px solid rgba(246, 241, 231, .16);
  font-size: .68rem;
  letter-spacing: .22em;
  color: rgba(246, 241, 231, .46);
}

.cg-nav__count {
  font-family: var(--cg-serif);
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--cg-gold);
}

.cg-nav__item { display: block; }

.cg-nav__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .62rem 0 .62rem 1.05rem;
  border-bottom: 1px solid rgba(246, 241, 231, .12);
  color: rgba(246, 241, 231, .74);
  font-size: .92rem;
  letter-spacing: .04em;
  transition: color .18s ease, padding-left .18s ease;
}

.cg-nav__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cg-gold);
  transform: translateY(-50%) scale(.2);
  opacity: 0;
  transition: opacity .18s ease, transform .18s ease;
}

.cg-nav__link:hover,
.cg-nav__link:focus-visible {
  color: #FFFFFF;
  padding-left: 1.3rem;
}

.cg-nav__link:hover::before,
.cg-nav__link:focus-visible::before {
  opacity: .55;
  transform: translateY(-50%) scale(.7);
}

.cg-nav__link[aria-current="page"] {
  color: #FFFFFF;
}

.cg-nav__link[aria-current="page"]::before {
  opacity: 1;
  transform: translateY(-50%) scale(1);
}

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

.cg-nav__index {
  flex: none;
  min-width: 1.5rem;
  font-family: var(--cg-mono);
  font-size: .66rem;
  letter-spacing: .1em;
  color: rgba(95, 158, 160, .92);
}

.cg-nav__label {
  min-width: 0;
  letter-spacing: .05em;
}

/* 状态面板 */
.cg-header__panel {
  display: none;
  flex: 1 1 100%;
  width: 100%;
  margin-top: .35rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(246, 241, 231, .16);
}

.cg-header[data-open] .cg-header__panel { display: block; }

.cg-header__status {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: .8rem;
  font-size: .72rem;
  letter-spacing: .08em;
  color: rgba(246, 241, 231, .62);
}

.cg-dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cg-celadon);
  box-shadow: 0 0 0 3px rgba(95, 158, 160, .18);
  animation: cg-pulse 3.8s ease-in-out infinite;
}

@keyframes cg-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(95, 158, 160, .18); }
  50% { box-shadow: 0 0 0 7px rgba(95, 158, 160, .04); }
}

.cg-header__link {
  display: inline-block;
  margin-top: .85rem;
  padding-bottom: 2px;
  font-size: .78rem;
  letter-spacing: .12em;
  color: rgba(246, 241, 231, .7);
  border-bottom: 1px solid rgba(246, 241, 231, .26);
  transition: color .18s ease, border-color .18s ease;
}

.cg-header__link:hover,
.cg-header__link:focus-visible {
  color: var(--cg-gold);
  border-bottom-color: var(--cg-gold);
}

/* 滚动进度刻度 */
.cg-header__progress {
  display: none;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 2px;
  transform-origin: top center;
  transform: scaleY(var(--cg-progress, 0));
  background-image: linear-gradient(180deg, var(--cg-gold) 0%, rgba(212, 175, 55, .28) 100%);
  pointer-events: none;
}

/* ---------- 6. 桌面端框架态 ---------- */
@media (min-width: 1080px) {
  html { scroll-padding-top: 0; }

  .cg-header {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--cg-rail);
    border-bottom: 0;
    border-right: 1px solid rgba(212, 175, 55, .3);
    box-shadow: 14px 0 40px -32px rgba(10, 42, 74, .9);
  }

  .cg-header__inner {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: 0;
    height: 100%;
    padding: 1.75rem 1.5rem 1.5rem;
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .cg-nav-toggle { display: none; }

  .cg-nav {
    display: block;
    flex: 0 0 auto;
    margin-top: 2.6rem;
  }

  .cg-header__panel {
    display: block;
    flex: 0 0 auto;
    margin-top: auto;
    padding-top: 1.4rem;
  }

  .cg-header__progress { display: block; }

  #main-content,
  .cg-footer { margin-left: var(--cg-rail); }
}

/* ---------- 7. 页脚 ---------- */
.cg-footer {
  background-image: linear-gradient(180deg, #0A2A4A 0%, #0B2743 100%);
  color: rgba(246, 241, 231, .8);
  border-top: 1px solid rgba(212, 175, 55, .42);
  font-size: .92rem;
}

.cg-footer__inner {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding: clamp(2.5rem, 5vw, 4.5rem) var(--cg-gutter) 1.75rem;
}

.cg-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
}

.cg-footer__brand { min-width: 0; }

.cg-footer__mark {
  font-family: var(--cg-serif);
  font-size: 1.55rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: .14em;
  color: #FFFFFF;
}

.cg-footer__tagline {
  margin-top: .55rem;
  font-size: .82rem;
  letter-spacing: .06em;
  color: rgba(246, 241, 231, .54);
}

.cg-footer__facts {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem .5rem;
  margin-top: 1.3rem;
}

.cg-footer__facts li {
  padding: .22rem .72rem;
  border: 1px solid rgba(246, 241, 231, .18);
  border-radius: 999px;
  font-size: .72rem;
  letter-spacing: .08em;
  color: rgba(246, 241, 231, .74);
}

.cg-footer__cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 1.9rem 1.5rem;
}

.cg-footer__col { min-width: 0; }

.cg-footer__col-title {
  padding-bottom: .55rem;
  margin-bottom: .85rem;
  border-bottom: 1px solid rgba(246, 241, 231, .14);
  font-family: var(--cg-sans);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--cg-gold);
}

.cg-footer__list li + li { margin-top: .1rem; }

.cg-footer__list a {
  display: inline-block;
  padding: .16rem 0;
  font-size: .9rem;
  letter-spacing: .04em;
  color: rgba(246, 241, 231, .74);
  border-bottom: 1px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

.cg-footer__list a:hover,
.cg-footer__list a:focus-visible {
  color: #FFFFFF;
  border-bottom-color: var(--cg-gold);
}

.cg-footer__meta {
  display: flex;
  flex-direction: column;
  gap: .7rem;
  margin-top: clamp(2rem, 4vw, 3.25rem);
  padding-top: 1.5rem;
  border-top: 1px solid rgba(246, 241, 231, .16);
  font-size: .8rem;
  letter-spacing: .04em;
  color: rgba(246, 241, 231, .55);
}

.cg-footer__version {
  max-width: 68ch;
  font-size: .82rem;
  line-height: 1.7;
  color: rgba(246, 241, 231, .78);
}

.cg-footer__contact {
  max-width: 80ch;
  line-height: 1.7;
  overflow-wrap: break-word;
}

.cg-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1.4rem;
  margin-top: .25rem;
}

.cg-footer__legal a {
  padding-bottom: 1px;
  color: rgba(246, 241, 231, .72);
  border-bottom: 1px solid rgba(246, 241, 231, .24);
  transition: color .18s ease, border-color .18s ease;
}

.cg-footer__legal a:hover,
.cg-footer__legal a:focus-visible {
  color: var(--cg-gold);
  border-bottom-color: var(--cg-gold);
}

.cg-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: .5rem 1.5rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(246, 241, 231, .1);
  font-size: .74rem;
  letter-spacing: .06em;
  color: rgba(246, 241, 231, .42);
}

.cg-footer__icp {
  font-family: var(--cg-mono);
  letter-spacing: .04em;
}

.cg-footer__copy { font-family: var(--cg-sans); }

@media (min-width: 720px) {
  .cg-footer__top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr);
    gap: 2.5rem 3rem;
  }
}

/* ---------- 8. 通用版式组件 ---------- */
.cg-container {
  width: 100%;
  max-width: var(--cg-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--cg-gutter);
  padding-right: var(--cg-gutter);
}

.cg-section { padding-block: clamp(2.75rem, 6vw, 5.5rem); }
.cg-section--tight { padding-block: clamp(1.75rem, 3.5vw, 3rem); }

.cg-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-family: var(--cg-sans);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .22em;
  color: var(--cg-muted);
}

.cg-eyebrow::before {
  content: "";
  width: 1.7rem;
  height: 1px;
  background: var(--cg-gold);
  flex: none;
}

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

.cg-prose {
  max-width: 68ch;
  color: var(--cg-body-ink);
}

.cg-prose > * + * { margin-top: 1.05em; }
.cg-prose h2 { margin-top: 2.2em; font-size: clamp(1.35rem, 2.2vw, 1.85rem); }
.cg-prose h3 { margin-top: 1.7em; }
.cg-prose ul,
.cg-prose ol { padding-left: 1.25rem; list-style: revert; }
.cg-prose li + li { margin-top: .45em; }
.cg-prose a {
  color: var(--cg-navy);
  border-bottom: 1px solid var(--cg-gold-soft);
  transition: border-color .18s ease;
}
.cg-prose a:hover { border-bottom-color: var(--cg-gold); }
.cg-prose strong { color: var(--cg-navy); font-weight: 600; }
.cg-prose blockquote {
  padding-left: 1.1rem;
  border-left: 2px solid var(--cg-gold);
  color: var(--cg-muted);
}

/* 面包屑 */
.cg-breadcrumb {
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--cg-muted);
}

.cg-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
}

.cg-breadcrumb li {
  display: flex;
  align-items: center;
  gap: .4rem;
}

.cg-breadcrumb li + li::before {
  content: "/";
  color: rgba(10, 42, 74, .28);
}

.cg-breadcrumb a { transition: color .18s ease; }
.cg-breadcrumb a:hover,
.cg-breadcrumb a:focus-visible { color: var(--cg-navy); }
.cg-breadcrumb [aria-current="page"] { color: var(--cg-navy); }

/* 网格 */
.cg-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.75rem);
}

.cg-grid > * { grid-column: span 12; min-width: 0; }

@media (min-width: 720px) {
  .cg-span-4 { grid-column: span 4; }
  .cg-span-6 { grid-column: span 6; }
  .cg-span-8 { grid-column: span 8; }
  .cg-span-12 { grid-column: span 12; }
}

@media (min-width: 1080px) {
  .cg-span-lg-4 { grid-column: span 4; }
  .cg-span-lg-5 { grid-column: span 5; }
  .cg-span-lg-6 { grid-column: span 6; }
  .cg-span-lg-7 { grid-column: span 7; }
  .cg-span-lg-8 { grid-column: span 8; }
  .cg-span-lg-12 { grid-column: span 12; }
}

/* 卡片 */
.cg-card {
  position: relative;
  padding: clamp(1.25rem, 2.2vw, 1.9rem);
  background: var(--cg-paper);
  border: 1px solid var(--cg-line-soft);
  border-radius: var(--cg-radius-m);
  box-shadow: var(--cg-shadow-s);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.cg-card:hover,
.cg-card:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--cg-shadow-m);
  border-color: rgba(212, 175, 55, .45);
}

.cg-card__title {
  font-family: var(--cg-serif);
  font-size: 1.16rem;
  line-height: 1.35;
  color: var(--cg-navy);
  margin-bottom: .55rem;
}

.cg-card__text {
  font-size: .94rem;
  line-height: 1.78;
  color: var(--cg-body-ink);
}

.cg-card__meta {
  margin-top: 1rem;
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--cg-muted);
}

/* 标签 */
.cg-tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .18rem .64rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: .7rem;
  letter-spacing: .1em;
  line-height: 1.6;
  color: #3F7577;
  background: rgba(95, 158, 160, .1);
}

.cg-tag--gold { color: #7E6410; background: rgba(212, 175, 55, .14); }
.cg-tag--pink { color: #8E5555; background: rgba(230, 184, 184, .26); }
.cg-tag--navy { color: var(--cg-navy); background: rgba(10, 42, 74, .07); }

/* 图片容器基础规则 */
.cg-media {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  width: 100%;
  border: 1px solid var(--cg-line-soft);
  border-radius: var(--cg-radius-m);
  background-color: var(--cg-navy);
  background-image: linear-gradient(150deg, #0A2A4A 0%, #123A5E 58%, #16456E 100%);
}

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

.cg-media--portrait { aspect-ratio: 3 / 4; }
.cg-media--landscape { aspect-ratio: 16 / 10; }
.cg-media--square { aspect-ratio: 1 / 1; }
.cg-media--wide { aspect-ratio: 21 / 9; }
.cg-media--auto { aspect-ratio: auto; }

.cg-media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: .9rem 1rem;
  font-size: .72rem;
  letter-spacing: .08em;
  color: rgba(246, 241, 231, .88);
  background-image: linear-gradient(180deg, rgba(10, 42, 74, 0) 0%, rgba(10, 42, 74, .84) 100%);
}

.cg-media__placeholder {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  padding: 1rem;
  text-align: center;
  font-family: var(--cg-mono);
  font-size: .7rem;
  letter-spacing: .24em;
  color: rgba(212, 175, 55, .55);
}

/* ---------- 9. 按钮 ---------- */
.cg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  padding: .72rem 1.15rem;
  border: 1px solid transparent;
  border-radius: var(--cg-radius-s);
  font-family: var(--cg-sans);
  font-size: .88rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: .08em;
  text-align: center;
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}

.cg-btn--gold {
  background: var(--cg-gold);
  border-color: var(--cg-gold);
  color: #10283f;
  font-weight: 600;
}

.cg-btn--gold:hover,
.cg-btn--gold:focus-visible {
  background: #E1BF55;
  border-color: #E1BF55;
  transform: translateY(-1px);
  box-shadow: 0 10px 22px -14px rgba(212, 175, 55, .95);
}

.cg-btn--ghost {
  border-color: rgba(246, 241, 231, .3);
  color: var(--cg-shell);
}

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

.cg-btn--outline {
  border-color: var(--cg-line);
  color: var(--cg-navy);
  background: transparent;
}

.cg-btn--outline:hover,
.cg-btn--outline:focus-visible {
  border-color: var(--cg-navy);
  background: rgba(10, 42, 74, .05);
}

.cg-btn--navy {
  background: var(--cg-navy);
  border-color: var(--cg-navy);
  color: var(--cg-shell);
}

.cg-btn--navy:hover,
.cg-btn--navy:focus-visible {
  background: var(--cg-navy-2);
  border-color: var(--cg-navy-2);
}

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

/* ---------- 10. 滚动显现 ---------- */
[data-reveal] {
  transition:
    opacity .48s ease,
    transform .48s cubic-bezier(.22, .61, .36, 1);
  transition-delay: var(--cg-delay, 0ms);
}

.cg-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
}

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

/* ---------- 11. 无障碍与偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  [data-reveal],
  .cg-js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .cg-dot { animation: none; }

  .cg-card:hover,
  .cg-card:focus-within,
  .cg-btn--gold:hover,
  .cg-btn--gold:focus-visible,
  .cg-brand:hover .cg-brand__mark { transform: none; }
}

@media (forced-colors: active) {
  .cg-header,
  .cg-footer {
    border-color: CanvasText;
  }

  .cg-nav__link[aria-current="page"]::before {
    background: Highlight;
  }
}

/* ---------- 12. 打印 ---------- */
@media print {
  .cg-header,
  .cg-skip,
  .cg-header__progress { display: none !important; }

  #main-content,
  .cg-footer { margin-left: 0 !important; }

  body {
    background: #FFFFFF;
    color: #000000;
  }
}