/* ==========================================================================
   汇赢国际 · 共享样式表 /assets/site.css
   基底：深墨蓝 | 刻度：品牌金 | 状态：青瓷绿 | 反馈：琥珀橙
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 10rem;
}

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

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

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; width: 100%; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  --ink-950: #071322;
  --ink-900: #0B1B2B;
  --ink-800: #10263A;
  --ink-700: #17334C;
  --gold-500: #C9A24B;
  --gold-300: #E6CE93;
  --celadon-500: #4E9E8F;
  --amber-500: #FF8A3D;
  --paper-050: #F4F0E6;
  --slate-400: #93A5B5;
  --white: #FFFFFF;

  --text-strong: #EAF2FA;
  --text-base: #C3CFDB;
  --text-mute: #8FA1B2;

  --hairline: rgba(147, 165, 181, .22);
  --hairline-soft: rgba(147, 165, 181, .13);
  --hairline-gold: rgba(201, 162, 75, .42);

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

  --fs-display: clamp(2rem, 5.2vw, 4.5rem);
  --fs-h2: clamp(1.5rem, 3.1vw, 2.125rem);
  --fs-h3: clamp(1.125rem, 1.8vw, 1.375rem);
  --fs-body: 1.0625rem;
  --fs-small: .875rem;
  --fs-micro: .75rem;

  --radius-s: 4px;
  --radius-m: 8px;
  --radius-pill: 999px;

  --shadow-card: 0 1px 0 rgba(255, 255, 255, .03), 0 12px 26px -20px rgba(0, 0, 0, .92);
  --shadow-lift: 0 20px 42px -24px rgba(0, 0, 0, .96), 0 0 0 1px rgba(201, 162, 75, .26);

  --ease: cubic-bezier(.2, .8, .2, 1);
  --dur: 160ms;

  --shell: 1320px;
  --gutter: clamp(1rem, 4vw, 3rem);
}

/* ---------- 3. 中文排版基底 ---------- */
body {
  min-height: 100vh;
  background:
    radial-gradient(120% 80% at 12% -10%, rgba(23, 51, 76, .78), transparent 62%),
    radial-gradient(90% 55% at 100% 0%, rgba(201, 162, 75, .07), transparent 58%),
    var(--ink-900);
  color: var(--text-base);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  letter-spacing: .012em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-wrap: break-word;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-strong);
  line-height: 1.22;
  letter-spacing: -.012em;
}

h1 { font-size: var(--fs-display); font-weight: 700; line-height: 1.08; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: 1.0625rem; }

strong, b { color: var(--text-strong); font-weight: 600; }

code, kbd, samp {
  font-family: var(--font-mono);
  font-size: .875em;
  letter-spacing: .02em;
  color: var(--gold-300);
}

::selection { background: rgba(255, 138, 61, .34); color: var(--white); }

:focus-visible {
  outline: 2px solid var(--amber-500);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 4. 通用工具 ---------- */
.u-visually-hidden {
  position: absolute !important;
  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;
}

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.tickline {
  display: block;
  height: 5px;
  background-image: repeating-linear-gradient(90deg, rgba(147, 165, 181, .42) 0 1px, transparent 1px 12px);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}

.meta {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .08em;
  color: var(--text-mute);
  text-transform: uppercase;
}

.num {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  color: var(--gold-300);
  font-variant-numeric: tabular-nums;
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: .5rem;
  left: .5rem;
  z-index: 400;
  padding: .6rem 1rem;
  background: var(--amber-500);
  color: #22110A;
  font-family: var(--font-display);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .04em;
  border-radius: var(--radius-s);
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--ink-950);
  outline-offset: 2px;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .78rem 1.35rem;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .9375rem;
  letter-spacing: .05em;
  line-height: 1.2;
  white-space: nowrap;
  transition:
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--gold-500);
  color: #0A1520;
  box-shadow: 0 12px 30px -20px rgba(201, 162, 75, .95);
}
.btn--primary:hover { background: var(--gold-300); }

.btn--ghost {
  background: rgba(16, 38, 58, .68);
  color: var(--gold-300);
  border-color: var(--hairline-gold);
}
.btn--ghost:hover { background: rgba(201, 162, 75, .12); color: var(--white); }

.btn--quiet {
  background: transparent;
  color: var(--text-base);
  border-color: var(--hairline);
}
.btn--quiet:hover { color: var(--white); border-color: rgba(147, 165, 181, .48); }

.btn--sm {
  padding: .38rem .8rem;
  font-size: .75rem;
  letter-spacing: .06em;
}

/* ---------- 7. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: linear-gradient(180deg, rgba(7, 19, 34, .97), rgba(11, 27, 43, .93));
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--hairline);
  color: var(--white);
}

.site-header__inner {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 工具条 */
.utilbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1rem;
  padding-block: .5rem;
  border-bottom: 1px solid var(--hairline-soft);
  font-size: var(--fs-micro);
  letter-spacing: .05em;
  color: var(--text-mute);
}

.utilbar__group {
  display: flex;
  align-items: center;
  gap: .55rem;
  min-width: 0;
}

.utilbar__group--end { gap: .7rem; }

.utilbar__link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .25rem .5rem;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  color: var(--text-mute);
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.utilbar__link::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--celadon-500);
  flex: 0 0 auto;
}

.utilbar__link:hover {
  color: var(--gold-300);
  border-color: var(--hairline-gold);
  background: rgba(201, 162, 75, .07);
}

/* 版本切换 */
.version-picker { position: relative; }

.version-picker__trigger {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .26rem .55rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-s);
  background: rgba(16, 38, 58, .7);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .06em;
  color: var(--gold-300);
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.version-picker__trigger:hover {
  border-color: var(--hairline-gold);
  background: rgba(201, 162, 75, .09);
}

.version-picker__label {
  font-family: var(--font-body);
  letter-spacing: .04em;
  color: var(--text-mute);
}

.version-picker__caret {
  width: 0;
  height: 0;
  border-left: 3.5px solid transparent;
  border-right: 3.5px solid transparent;
  border-top: 4px solid currentColor;
  transition: transform var(--dur) var(--ease);
}

.version-picker__trigger[aria-expanded="true"] .version-picker__caret { transform: rotate(180deg); }

.version-picker__menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 60;
  min-width: 12rem;
  padding: .35rem;
  background: var(--ink-800);
  border: 1px solid var(--hairline-gold);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-card);
  display: none;
}

.version-picker__menu[data-open] {
  display: block;
  animation: hw-menu-in 160ms var(--ease);
}

@keyframes hw-menu-in {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.version-picker__option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: .5rem .6rem;
  border-radius: var(--radius-s);
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--text-base);
  text-align: left;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.version-picker__option:hover {
  background: rgba(201, 162, 75, .1);
  color: var(--gold-300);
}

.version-picker__option[data-current="true"] { color: var(--gold-300); }

.version-picker__option[data-current="true"]::after {
  content: "当前";
  padding: 0 .28rem;
  border: 1px solid rgba(78, 158, 143, .5);
  border-radius: 2px;
  font-size: .625rem;
  letter-spacing: .08em;
  color: var(--celadon-500);
}

/* 徽标与语言切换 */
.version-badge {
  padding: .22rem .5rem;
  border: 1px solid rgba(78, 158, 143, .42);
  border-radius: 2px;
  background: rgba(78, 158, 143, .09);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .08em;
  color: var(--celadon-500);
  white-space: nowrap;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: .16rem;
  padding: .22rem .5rem;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .08em;
  color: var(--text-mute);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.lang-toggle__zh { opacity: .42; transition: opacity var(--dur) var(--ease); }
.lang-toggle__en { opacity: 1; transition: opacity var(--dur) var(--ease); }

.lang-toggle[aria-pressed="true"] { color: var(--gold-300); border-color: var(--hairline-gold); }
.lang-toggle[aria-pressed="true"] .lang-toggle__zh { opacity: 1; }
.lang-toggle[aria-pressed="true"] .lang-toggle__en { opacity: .42; }

.lang-toggle:hover { border-color: var(--hairline-gold); color: var(--gold-300); }

/* 刊头 */
.masthead {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: clamp(.8rem, 2vw, 1.15rem);
}

.brandmark {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .34rem;
  text-align: center;
}

.brandmark__rule {
  display: block;
  width: 2.5rem;
  height: 1px;
  background: var(--gold-500);
  opacity: .85;
  transition: width var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.brandmark:hover .brandmark__rule { width: 3.5rem; opacity: 1; }

.brandmark__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.5vw, 1.85rem);
  letter-spacing: .22em;
  text-indent: .22em;
  line-height: 1.15;
  color: var(--white);
  transition: color var(--dur) var(--ease), text-shadow var(--dur) var(--ease);
}

.brandmark:hover .brandmark__name {
  color: var(--gold-300);
  text-shadow: 0 0 24px rgba(201, 162, 75, .35);
}

.brandmark__latin {
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .42em;
  text-indent: .42em;
  color: var(--gold-500);
}

.brandmark--footer { align-items: flex-start; text-align: left; gap: .3rem; }
.brandmark--footer .brandmark__name { font-size: 1.15rem; letter-spacing: .18em; text-indent: .18em; }
.brandmark--footer .brandmark__latin { font-size: .5625rem; letter-spacing: .32em; text-indent: .32em; }
.brandmark--footer .brandmark__rule { width: 1.75rem; }
.brandmark--footer:hover .brandmark__rule { width: 2.5rem; }

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  align-items: center;
  gap: .5rem;
  padding: .42rem .6rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-s);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--text-mute);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 14px;
}

.nav-toggle__bars span {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] {
  color: var(--amber-500);
  border-color: rgba(255, 138, 61, .55);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

/* 栏目导航 */
.mastnav {
  position: relative;
  border-top: 1px solid var(--hairline);
  border-top-color: var(--hairline);
}

.mastnav__ruler {
  display: block;
  height: 6px;
  background-image: repeating-linear-gradient(90deg, rgba(147, 165, 181, .46) 0 1px, transparent 1px 14px);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.mastnav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(.2rem, 2vw, 1.3rem);
  padding: .3rem 0 .7rem;
}

.mastnav__link {
  position: relative;
  display: inline-block;
  padding: .45rem .32rem;
  font-size: .9375rem;
  letter-spacing: .07em;
  color: var(--text-base);
  transition: color var(--dur) var(--ease);
}

.mastnav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: .12rem;
  width: calc(100% - .6rem);
  height: 1px;
  background: var(--gold-500);
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  transition: transform var(--dur) var(--ease);
}

.mastnav__link:hover { color: var(--white); }
.mastnav__link:hover::after { transform: translateX(-50%) scaleX(.55); }

.mastnav__link[aria-current="page"] { color: var(--gold-300); }
.mastnav__link[aria-current="page"]::after { transform: translateX(-50%) scaleX(1); }

/* 滚动进度条 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(201, 162, 75, .14);
  overflow: hidden;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--gold-500), var(--amber-500));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, var(--ink-900), var(--ink-950));
  border-top: 1px solid var(--hairline);
  color: var(--text-mute);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background-image: repeating-linear-gradient(90deg, rgba(201, 162, 75, .55) 0 1px, transparent 1px 22px);
  opacity: .55;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 2fr);
  gap: clamp(2rem, 5vw, 4rem);
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(2.6rem, 5vw, 4rem) var(--gutter) clamp(1.6rem, 3vw, 2.4rem);
}

.footer-brand { display: flex; flex-direction: column; }

.footer-brand__summary {
  margin-top: 1.1rem;
  max-width: 36ch;
  font-size: .9375rem;
  line-height: 1.85;
  color: #B4C2D0;
}

.footer-brand__meta {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--celadon-500);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2.5rem);
  align-content: start;
}

.footer-col__title {
  margin-bottom: .95rem;
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 500;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gold-500);
}

.footer-col__list { display: grid; gap: .62rem; }

.footer-col__link {
  display: inline-block;
  padding-bottom: .1rem;
  border-bottom: 1px solid transparent;
  font-size: .875rem;
  line-height: 1.65;
  color: #B4C2D0;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-col__link:hover {
  color: var(--gold-300);
  border-bottom-color: var(--hairline-gold);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem 1.5rem;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 1.15rem var(--gutter) 2.2rem;
  border-top: 1px solid var(--hairline-soft);
  font-size: var(--fs-micro);
  letter-spacing: .05em;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem 1.25rem;
}

.footer-legal a {
  color: var(--text-mute);
  transition: color var(--dur) var(--ease);
}

.footer-legal a:hover { color: var(--gold-300); }

.footer-note { color: #7F8F9E; }

.footer-copy {
  font-family: var(--font-mono);
  letter-spacing: .06em;
  color: #6C7C8B;
}

/* ---------- 9. 面包屑 / 正文 / 网格 / 卡片 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-size: var(--fs-micro);
  letter-spacing: .08em;
  color: var(--text-mute);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.breadcrumb li + li::before {
  content: "/";
  color: rgba(147, 165, 181, .5);
}

.breadcrumb a { transition: color var(--dur) var(--ease); }
.breadcrumb a:hover { color: var(--gold-300); }
.breadcrumb [aria-current="page"] { color: var(--gold-300); }

.prose {
  max-width: 68ch;
  font-size: var(--fs-body);
  line-height: 1.85;
}

.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 2.4em; }
.prose h3 { margin-top: 1.9em; }
.prose h2 + *, .prose h3 + * { margin-top: .7em; }

.prose ul { list-style: disc; padding-left: 1.3em; }
.prose ol { list-style: decimal; padding-left: 1.5em; }
.prose li + li { margin-top: .45em; }

.prose a {
  color: var(--gold-300);
  border-bottom: 1px solid rgba(230, 206, 147, .4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.prose a:hover { color: var(--amber-500); border-bottom-color: var(--amber-500); }

.prose blockquote {
  padding-left: 1.1rem;
  border-left: 2px solid var(--gold-500);
  color: var(--text-mute);
}

.grid {
  display: grid;
  gap: clamp(1rem, 2.5vw, 1.75rem);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.panel {
  position: relative;
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, rgba(23, 51, 76, .72), rgba(16, 38, 58, .88));
  box-shadow: var(--shadow-card);
  transition:
    transform var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.panel:hover {
  transform: translateY(-4px);
  border-color: var(--hairline-gold);
  box-shadow: var(--shadow-lift);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .2rem .5rem;
  border: 1px solid rgba(78, 158, 143, .38);
  border-radius: 2px;
  background: rgba(78, 158, 143, .09);
  font-size: .6875rem;
  letter-spacing: .08em;
  color: var(--celadon-500);
  white-space: nowrap;
}

.tag--gold {
  border-color: rgba(201, 162, 75, .42);
  background: rgba(201, 162, 75, .09);
  color: var(--gold-300);
}

.tag--amber {
  border-color: rgba(255, 138, 61, .42);
  background: rgba(255, 138, 61, .09);
  color: var(--amber-500);
}

/* ---------- 10. 图片容器基础 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-m);
  background:
    linear-gradient(135deg, rgba(201, 162, 75, .16), rgba(78, 158, 143, .13) 55%, rgba(11, 27, 43, 0) 100%),
    var(--ink-800);
  aspect-ratio: 16 / 9;
}

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

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

.media__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: .8rem .95rem;
  font-size: var(--fs-micro);
  letter-spacing: .05em;
  color: #D6DFE9;
  background: linear-gradient(180deg, rgba(7, 19, 34, 0), rgba(7, 19, 34, .88));
}

/* ---------- 11. 显现动效协议 ---------- */
html.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

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

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr; gap: 2.2rem; }
  .footer-cols { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
}

@media (max-width: 899px) {
  html { scroll-padding-top: 8rem; }

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

  .masthead { padding-block: .85rem 1rem; }

  .mastnav {
    visibility: hidden;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    border-top-color: transparent;
    transition:
      max-height 200ms var(--ease),
      opacity 140ms var(--ease),
      border-color 140ms var(--ease);
  }

  .mastnav[data-open] {
    visibility: visible;
    max-height: 68vh;
    overflow-y: auto;
    opacity: 1;
    border-top-color: var(--hairline);
  }

  .mastnav__ruler { display: none; }

  .mastnav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .35rem 0 .9rem;
  }

  .mastnav__link {
    display: block;
    padding: .78rem .3rem;
    border-bottom: 1px solid var(--hairline-soft);
    font-size: 1rem;
    letter-spacing: .09em;
  }

  .mastnav__link::after { display: none; }

  .mastnav__link[aria-current="page"] {
    padding-left: .8rem;
    background: rgba(201, 162, 75, .07);
    border-bottom-color: var(--hairline-gold);
    color: var(--gold-300);
  }

  .footer-base { justify-content: flex-start; }
}

@media (max-width: 640px) {
  :root { --gutter: 1.1rem; }

  .utilbar { font-size: .6875rem; }
  .utilbar__group { gap: .4rem; }
  .utilbar__group--end { gap: .45rem; }
  .version-picker__label { display: none; }
  .utilbar__link { padding-inline: .35rem; }

  .brandmark__name { letter-spacing: .16em; text-indent: .16em; }
  .brandmark__latin { letter-spacing: .3em; text-indent: .3em; }

  .footer-cols { grid-template-columns: 1fr; }
  .footer-col__list { gap: .5rem; }
}

/* ---------- 13. 可访问性偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

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

  .panel:hover,
  .btn:hover { transform: none; }
}