/* =========================================================
   金博中心 · 官方中文站  共享样式 /assets/site.css
   负责：reset / CSS 变量 / 中文排版 / 头部 / 页脚 /
        通用按钮 / 面包屑 / 正文容器 / 网格 / 基础组件
   ========================================================= */

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

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

body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd {
  margin: 0;
}
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

/* ---------- 2. 设计与色彩变量 ---------- */
:root {
  --c-navy: #0B1B33;
  --c-navy-deep: #08152A;
  --c-navy-card: #12294A;
  --c-gold-a: #E3C070;
  --c-gold-b: #A67C2E;
  --c-gold-line: rgba(227, 192, 112, 0.42);
  --c-white: #F4F7FB;
  --c-cream: #EDE7DA;
  --c-stone: #6B7787;
  --c-amber: #D9741F;
  --c-jade: #4E8E7A;
  --c-clay: #B26A4F;
  --c-ink: #0A0F18;

  --grad-gold: linear-gradient(135deg, #E3C070 0%, #A67C2E 100%);
  --line-soft: rgba(107, 119, 135, 0.32);
  --line-mid: rgba(107, 119, 135, 0.46);
  --line-strong: rgba(107, 119, 135, 0.62);

  --radius: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 26px 52px -34px rgba(0, 0, 0, 0.96);
  --shadow-panel: 0 32px 72px -30px rgba(0, 0, 0, 0.92);

  --dur: 180ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system,
    "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas,
    "Liberation Mono", monospace;

  --fs-body: 17px;
  --fs-note: 13px;
  --fs-sub: 22px;
  --fs-sec: 36px;
  --fs-hero: 64px;

  --rail-w: 56px;
  --header-h: 76px;
  --wrap: 1240px;
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--c-navy);
  color: var(--c-white);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.9;
  letter-spacing: 0.01em;
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.32;
}
h1 { font-size: clamp(34px, 5.5vw, var(--fs-hero)); }
h2 { font-size: clamp(24px, 3.2vw, var(--fs-sec)); }
h3 { font-size: clamp(19px, 2vw, var(--fs-sub)); }
h4 { font-size: 17px; }

strong { font-weight: 700; }
small { font-size: var(--fs-note); }

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

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
}

/* ---------- 4. 通用容器 / 网格 ---------- */
.kb-container {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 clamp(18px, 4vw, 44px);
}
.kb-container--narrow { max-width: 880px; }

.kb-grid {
  display: grid;
  gap: clamp(16px, 2vw, 24px);
  grid-template-columns: 1fr;
}
.kb-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.kb-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.kb-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 1080px) {
  .kb-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kb-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 680px) {
  .kb-grid--2,
  .kb-grid--3,
  .kb-grid--4 { grid-template-columns: 1fr; }
}

/* ---------- 5. 跳至主要内容 ---------- */
.kb-skip {
  position: absolute;
  left: 14px;
  top: -72px;
  z-index: 130;
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--grad-gold);
  color: #1A1204;
  font-size: 14px;
  font-weight: 700;
  transition: top var(--dur) var(--ease);
}
.kb-skip:focus { top: 12px; }

/* ---------- 6. 头部 / 框架式导航 ---------- */
.kb-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(11, 27, 51, 0.995) 0%, rgba(11, 27, 51, 0.94) 100%);
  border-bottom: 1px solid var(--line-soft);
}

.kb-rail {
  display: none;
}

@media (min-width: 1024px) {
  .kb-rail {
    display: block;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--rail-w);
    z-index: 55;
    pointer-events: none;
    border-right: 1px solid var(--line-soft);
    background-color: var(--c-navy-deep);
    background-image: repeating-linear-gradient(
      180deg,
      rgba(107, 119, 135, 0.38) 0px,
      rgba(107, 119, 135, 0.38) 1px,
      transparent 1px,
      transparent 46px
    );
  }
  .kb-rail__mark {
    position: absolute;
    left: 50%;
    top: 96px;
    width: 3px;
    height: 92px;
    transform: translateX(-50%);
    border-radius: 3px;
    background: var(--grad-gold);
    opacity: 0.75;
  }
}

.kb-header__bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.5vw, 22px);
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px clamp(16px, 4vw, 44px);
  min-height: var(--header-h);
  transition: min-height var(--dur) var(--ease), padding var(--dur) var(--ease);
}

.kb-header.is-compact .kb-header__bar {
  min-height: 58px;
  padding-top: 8px;
  padding-bottom: 8px;
}

/* 品牌 */
.kb-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  margin-right: auto;
}
.kb-brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--grad-gold);
  color: #14100A;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0;
  box-shadow: 0 12px 26px -14px rgba(227, 192, 112, 0.7);
  transition: transform var(--dur) var(--ease);
}
.kb-brand:hover .kb-brand__mark { transform: translateY(-2px); }
.kb-brand__text { display: flex; flex-direction: column; line-height: 1.18; }
.kb-brand__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--c-white);
}
.kb-brand__line {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.26em;
  color: var(--c-stone);
}
.kb-header.is-compact .kb-brand__line { display: none; }

/* 导航 */
.kb-nav { margin-inline: auto; }
.kb-nav__list { display: flex; align-items: center; gap: 2px; }
.kb-nav__link {
  display: inline-block;
  padding: 10px 13px;
  border-radius: 9px;
  border: 1px solid transparent;
  font-size: 14.5px;
  font-weight: 500;
  color: rgba(244, 247, 251, 0.84);
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.kb-nav__link:hover {
  color: #F6DFA8;
  border-color: var(--c-gold-line);
  background: rgba(227, 192, 112, 0.06);
}
.kb-nav__link[aria-current="page"] {
  color: #F2DA9C;
  border-color: var(--c-gold-line);
  background: rgba(227, 192, 112, 0.1);
}

/* 右侧动作区 */
.kb-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.kb-entry-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-white);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.kb-entry-btn:hover {
  border-color: var(--c-gold-a);
  color: #F2DA9C;
  background: rgba(227, 192, 112, 0.07);
}
.kb-entry-btn[aria-expanded="true"] {
  border-color: var(--c-gold-a);
  color: #F2DA9C;
  background: rgba(227, 192, 112, 0.13);
}
.kb-entry-btn__dots { display: inline-flex; gap: 3px; }
.kb-entry-btn__dots i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
}

/* 移动导航按钮 */
.kb-nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-white);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.kb-nav-toggle:hover { border-color: var(--c-gold-a); color: #F2DA9C; }
.kb-nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
}
.kb-nav-toggle__bars i {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease);
}
.kb-nav-toggle[aria-expanded="true"] .kb-nav-toggle__bars i:first-child {
  transform: translateY(2.75px) rotate(45deg);
}
.kb-nav-toggle[aria-expanded="true"] .kb-nav__bars i:last-child { transform: none; }
.kb-nav-toggle[aria-expanded="true"] .kb-nav-toggle__bars i:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

/* ---------- 7. 统一入口面板 ---------- */
.kb-entry-panel {
  position: absolute;
  right: clamp(16px, 4vw, 44px);
  top: calc(100% - 4px);
  width: min(580px, calc(100vw - 36px));
  z-index: 80;
  display: none;
  padding: 18px 18px 16px;
  border: 1px solid var(--c-gold-line);
  border-radius: var(--radius);
  background: #0F2242;
  box-shadow: var(--shadow-panel);
}
.kb-entry-panel[data-open="true"] { display: block; }

.kb-entry-panel__hint {
  font-size: var(--fs-note);
  color: var(--c-stone);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.kb-entry-search {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius-sm);
  background: rgba(8, 21, 42, 0.7);
  transition: border-color var(--dur) var(--ease);
}
.kb-entry-search:focus-within { border-color: var(--c-gold-a); }
.kb-entry-search__icon {
  width: 13px;
  height: 13px;
  flex: 0 0 auto;
  border: 1.5px solid var(--c-stone);
  border-radius: 50%;
  position: relative;
}
.kb-entry-search__icon::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -3px;
  width: 6px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--c-stone);
  transform: rotate(45deg);
}
.kb-entry-search__input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--c-white);
  font-size: 15px;
  line-height: 1.6;
  appearance: none;
  -webkit-appearance: none;
}
.kb-entry-search__input::placeholder { color: rgba(107, 119, 135, 0.95); }
.kb-entry-search__input:focus { outline: none; }

.kb-entry-panel__groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px 18px;
  margin-top: 16px;
}
.kb-entry-panel__title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--c-gold-a);
  margin-bottom: 8px;
}
.kb-entry-panel__list { display: flex; flex-direction: column; gap: 2px; }
.kb-entry-panel__link {
  display: block;
  padding: 7px 9px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 14.5px;
  color: rgba(244, 247, 251, 0.86);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.kb-entry-panel__link:hover {
  color: #F2DA9C;
  border-color: var(--c-gold-line);
  background: rgba(227, 192, 112, 0.08);
}
.kb-entry-panel__empty {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-note);
  color: var(--c-amber);
}

/* ---------- 8. 顶部滚动刻度 ---------- */
.kb-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(107, 119, 135, 0.2);
}
.kb-progress__fill {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--grad-gold);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- 9. 通用按钮 ---------- */
.kb-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    color var(--dur) var(--ease), background-color var(--dur) var(--ease),
    filter var(--dur) var(--ease);
}
.kb-btn--gold {
  background: var(--grad-gold);
  color: #1A1204;
  border-color: rgba(227, 192, 112, 0.9);
  box-shadow: 0 16px 34px -20px rgba(227, 192, 112, 0.75);
}
.kb-btn--gold:hover { filter: brightness(1.07); transform: translateY(-2px); }
.kb-btn--ghost {
  background: transparent;
  color: var(--c-white);
  border-color: var(--line-strong);
}
.kb-btn--ghost:hover {
  color: #F2DA9C;
  border-color: var(--c-gold-a);
  transform: translateY(-2px);
}
.kb-btn--sm { padding: 9px 15px; font-size: 14px; }

/* ---------- 10. 面包屑 ---------- */
.kb-breadcrumb { padding: 18px 0 0; }
.kb-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-note);
  color: var(--c-stone);
}
.kb-breadcrumb__link {
  color: rgba(244, 247, 251, 0.72);
  transition: color var(--dur) var(--ease);
}
.kb-breadcrumb__link:hover { color: var(--c-gold-a); }
.kb-breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(107, 119, 135, 0.7);
}

/* ---------- 11. 章节 / 正文 / 卡片 / 状态 ---------- */
.kb-section {
  position: relative;
  padding: clamp(56px, 8vw, 110px) 0;
}
.kb-section--band { background: var(--c-navy-card); }
.kb-section--cream { background: var(--c-cream); color: var(--c-ink); }
.kb-section--slim { padding: clamp(20px, 3vw, 30px) 0; }

.kb-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--c-stone);
  text-transform: uppercase;
  margin-bottom: 14px;
  transition: color var(--dur) var(--ease);
}
[data-section].is-active .kb-eyebrow { color: var(--c-gold-a); }

.kb-section__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(107, 119, 135, 0.72);
  margin-bottom: 10px;
  transition: color 200ms var(--ease);
}
[data-section].is-active .kb-section__num { color: var(--c-gold-a); }

.kb-section__title { margin-bottom: 16px; }

.kb-rule {
  height: 1px;
  border: 0;
  margin: 22px 0;
  background: linear-gradient(90deg, var(--c-gold-a) 0%, rgba(227, 192, 112, 0) 72%);
  opacity: 0.65;
}

.kb-note-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: var(--fs-note);
  letter-spacing: 0.24em;
  color: var(--c-stone);
}

.kb-prose { max-width: 720px; }
.kb-prose p {
  max-width: 36em;
  line-height: 1.9;
  margin-bottom: 1.1em;
  color: rgba(244, 247, 251, 0.86);
}
.kb-section--cream .kb-prose p { color: rgba(10, 15, 24, 0.82); }
.kb-prose p:last-child { margin-bottom: 0; }

.kb-card {
  position: relative;
  padding: 22px 22px 20px;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius);
  background: var(--c-navy-card);
  box-shadow: var(--shadow-card);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}
.kb-card:hover {
  border-color: var(--c-gold-line);
  transform: translateY(-2px);
}
.kb-card--notch { border-bottom-left-radius: 0; }
.kb-card__title {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 8px;
}
.kb-card__text {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 247, 251, 0.78);
}
.kb-card__foot {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.kb-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.7;
}
.kb-status--new {
  color: #F0A75A;
  background: rgba(217, 116, 31, 0.12);
}
.kb-status--stable {
  color: #7FD3B8;
  background: rgba(78, 142, 122, 0.13);
}
.kb-status--legacy {
  color: #D99277;
  background: rgba(178, 106, 79, 0.13);
}

/* ---------- 12. 图片容器（供页面阶段放置占位图） ---------- */
.kb-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius);
  background: linear-gradient(155deg, #12294A 0%, #0B1B33 100%);
}
.kb-media::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}
.kb-media--wide::before { padding-top: 42%; }
.kb-media--4x3::before { padding-top: 75%; }
.kb-media--1x1::before { padding-top: 100%; }

.kb-media img,
.kb-media svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.kb-media__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: rgba(244, 247, 251, 0.72);
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.8);
}

/* ---------- 13. 页脚 ---------- */
.kb-footer {
  background: var(--c-navy-deep);
  border-top: 1px solid var(--c-gold-line);
  color: rgba(244, 247, 251, 0.78);
}
.kb-footer__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(44px, 6vw, 64px) clamp(18px, 4vw, 44px) 28px;
}
.kb-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr 0.9fr 1.2fr;
  gap: 36px 32px;
}

.kb-brand--footer .kb-brand__name { font-size: 16px; }
.kb-footer__desc {
  margin-top: 16px;
  max-width: 30em;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 247, 251, 0.7);
}
.kb-footer__meta {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--c-stone);
}

.kb-footer__title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--c-gold-a);
  margin-bottom: 14px;
}
.kb-footer__list { display: flex; flex-direction: column; gap: 8px; }
.kb-footer__link {
  display: inline-block;
  font-size: 14.5px;
  color: rgba(244, 247, 251, 0.76);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.kb-footer__link:hover {
  color: #F2DA9C;
  border-bottom-color: var(--c-gold-line);
}

.kb-footer__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 10px;
}
.kb-footer__key {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--c-stone);
}
.kb-footer__val {
  font-family: var(--font-mono);
  font-size: 14px;
  color: rgba(244, 247, 251, 0.9);
  word-break: break-all;
}

.kb-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 22px;
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-note);
  color: var(--c-stone);
}
.kb-footer__legal { font-family: var(--font-mono); letter-spacing: 0.06em; }
.kb-footer__copy { font-family: var(--font-mono); letter-spacing: 0.06em; }

/* ---------- 14. 响应式：平板 / 手机 ---------- */
@media (max-width: 1180px) {
  .kb-brand__line { display: none; }
  .kb-nav__link { padding: 10px 10px; font-size: 14px; }
}

@media (max-width: 960px) {
  :root { --header-h: 66px; }

  .kb-nav-toggle { display: inline-flex; }
  .kb-entry-btn__label { display: none; }
  .kb-entry-btn { padding: 9px 11px; }

  .kb-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    z-index: 58;
    margin-inline: 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 10px 18px 26px;
    background: #0B1B33;
    border-top: 1px solid var(--line-soft);
    border-bottom: 1px solid var(--c-gold-line);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
      visibility var(--dur) var(--ease);
  }
  .kb-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .kb-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .kb-nav__link {
    display: block;
    padding: 15px 10px;
    border: 0;
    border-bottom: 1px solid rgba(107, 119, 135, 0.2);
    border-radius: 0;
    font-size: 16.5px;
  }
  .kb-nav__link[aria-current="page"] {
    border: 0;
    border-bottom: 1px solid var(--c-gold-line);
    border-left: 2px solid var(--c-gold-a);
    background: rgba(227, 192, 112, 0.08);
  }

  .kb-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kb-footer__brandcol { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .kb-entry-panel__groups { grid-template-columns: 1fr; }
  .kb-entry-panel { top: calc(100% - 2px); }
}

@media (max-width: 560px) {
  .kb-header__bar { gap: 8px; }
  .kb-brand__mark { width: 34px; height: 34px; font-size: 16px; }
  .kb-brand__name { font-size: 15.5px; }
  .kb-btn--sm { padding: 8px 11px; font-size: 13px; }
  .kb-footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .kb-footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 15. 减弱动效 ---------- */
@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;
  }
}