/* ============================================================
   开博看台 · 共享样式 /assets/site.css
   深空黑底 + 草皮绿章节带 + 裁判黄指标 + 数据蓝版本
   纵向叙事长卷 / 悬浮胶囊导航 / 纸张叠层与印刷边框
   ============================================================ */

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

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

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

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

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

button,
input,
select,
textarea { font: inherit; color: inherit; }

a { color: inherit; }

/* ---------- 2. 变量 ---------- */
:root {
  --kb-black: #0B0F0E;
  --kb-ink: #10201A;
  --kb-green: #1F8A4C;
  --kb-green-bright: #35C46A;
  --kb-yellow: #F2C218;
  --kb-yellow-bright: #FFD643;
  --kb-blue: #2E7DF7;
  --kb-blue-soft: #7FB3FF;
  --kb-orange: #FF6A3D;
  --kb-gray: #8C9A94;
  --kb-paper: #F4F6F3;

  --kb-line: rgba(244, 246, 243, 0.14);
  --kb-line-strong: rgba(244, 246, 243, 0.30);
  --kb-green-wash: rgba(31, 138, 76, 0.16);
  --kb-yellow-wash: rgba(242, 194, 24, 0.14);

  --kb-font-display: "Oswald", "Arial Narrow", "Helvetica Neue Condensed",
    "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --kb-font-body: "PingFang SC", "Noto Sans SC", "Source Han Sans SC",
    "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --kb-font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular,
    Menlo, Consolas, "Courier New", monospace;

  --kb-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --kb-radius: 16px;
  --kb-radius-sm: 10px;

  --kb-gutter: 24px;
  --kb-shell: 1280px;
  --kb-header-offset: 104px;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--kb-black);
  color: var(--kb-paper);
  font-family: var(--kb-font-body);
  font-size: 17px;
  line-height: 1.75;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

#main-content {
  flex: 1 0 auto;
  padding-top: var(--kb-header-offset);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--kb-font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h1 { font-size: clamp(2.6rem, 7vw, 5.2rem); }
h2 { font-size: clamp(1.75rem, 3.6vw, 2.7rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.55rem); }
h4 { font-size: 1.05rem; }
h5 { font-size: 0.95rem; }

p { text-wrap: pretty; }

strong { color: var(--kb-paper); font-weight: 700; }

::selection {
  background: var(--kb-yellow);
  color: var(--kb-black);
}

:focus-visible {
  outline: 2px solid var(--kb-yellow);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 4. 布局容器 ---------- */
.kb-container {
  width: min(var(--kb-shell), 100% - (var(--kb-gutter) * 2));
  margin-inline: auto;
}

.kb-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.kb-span-3 { grid-column: span 3; }
.kb-span-4 { grid-column: span 4; }
.kb-span-5 { grid-column: span 5; }
.kb-span-6 { grid-column: span 6; }
.kb-span-8 { grid-column: span 8; }
.kb-span-9 { grid-column: span 9; }
.kb-span-12 { grid-column: span 12; }

.kb-prose {
  max-width: 68ch;
  color: rgba(244, 246, 243, 0.86);
}

.kb-prose > * + * { margin-top: 1.2em; }

.kb-prose h2,
.kb-prose h3 { color: var(--kb-paper); margin-top: 1.8em; }

.kb-prose a {
  color: var(--kb-blue-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.kb-prose a:hover { color: var(--kb-yellow); }

.kb-prose code,
.kb-prose kbd {
  font-family: var(--kb-font-mono);
  font-size: 0.88em;
  background: var(--kb-ink);
  border: 1px solid var(--kb-line);
  border-radius: 6px;
  padding: 0.1em 0.4em;
}

/* ---------- 5. 文字工具 ---------- */
.kb-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--kb-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--kb-gray);
}

.kb-eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--kb-green);
}

.kb-num {
  font-family: var(--kb-font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

/* ---------- 6. 跳过链接 ---------- */
.kb-skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  transform: translateY(-220%);
  background: var(--kb-yellow);
  color: var(--kb-black);
  font-family: var(--kb-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  padding: 10px 18px;
  border-radius: 999px;
  text-decoration: none;
  transition: transform 0.2s var(--kb-ease);
}

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

/* ---------- 7. 头部：悬浮胶囊导航 ---------- */
.kb-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  padding: 0;
}

.kb-header__progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(244, 246, 243, 0.06);
  overflow: hidden;
}

.kb-header__progress-bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--kb-green) 0%, var(--kb-green-bright) 62%, var(--kb-yellow) 100%);
}

.kb-capsule {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  width: min(1360px, 100% - 48px);
  margin: 16px auto 0;
  padding: 10px 12px 10px 16px;
  background: rgba(16, 32, 26, 0.84);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--kb-line);
  border-radius: 999px;
  box-shadow: 0 22px 48px -30px rgba(0, 0, 0, 0.95);
  transition: margin-top 0.3s var(--kb-ease), padding 0.3s var(--kb-ease),
    background-color 0.3s var(--kb-ease), border-color 0.3s var(--kb-ease);
}

.kb-header[data-condensed="true"] .kb-capsule {
  margin-top: 8px;
  padding: 6px 10px 6px 14px;
  background: rgba(11, 15, 14, 0.94);
  border-color: var(--kb-line-strong);
}

.kb-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--kb-paper);
}

.kb-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  padding: 7px 9px;
  font-family: var(--kb-font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #04220F;
  background: linear-gradient(135deg, var(--kb-green-bright), var(--kb-green));
  clip-path: polygon(0 0, 100% 0, 90% 100%, 0 100%);
  transition: background 0.25s var(--kb-ease);
}

.kb-brand:hover .kb-brand__mark {
  background: linear-gradient(135deg, var(--kb-yellow-bright), var(--kb-yellow));
}

.kb-brand__text { display: block; }

.kb-brand__name {
  display: block;
  font-family: var(--kb-font-display);
  font-weight: 800;
  font-size: 1.06rem;
  letter-spacing: 0.03em;
  line-height: 1.15;
}

.kb-brand__tag {
  display: block;
  font-family: var(--kb-font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.07em;
  color: var(--kb-gray);
  line-height: 1.3;
  white-space: nowrap;
}

.kb-header__section {
  flex: 0 0 auto;
  font-family: var(--kb-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--kb-green-bright);
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.25s var(--kb-ease), transform 0.25s var(--kb-ease);
}

.kb-header[data-condensed="true"] .kb-header__section {
  opacity: 1;
  transform: none;
}

.kb-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}

.kb-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.kb-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
  color: var(--kb-paper);
  transition: background-color 0.2s var(--kb-ease), color 0.2s var(--kb-ease),
    box-shadow 0.2s var(--kb-ease);
}

.kb-nav__idx {
  font-family: var(--kb-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--kb-gray);
}

.kb-nav__link:hover,
.kb-nav__link:focus-visible {
  background: var(--kb-green-wash);
  color: var(--kb-green-bright);
}

.kb-nav__link:hover .kb-nav__idx { color: var(--kb-green-bright); }

.kb-nav__link[aria-current="page"] {
  background: var(--kb-yellow-wash);
  color: var(--kb-yellow);
  box-shadow: inset 0 0 0 1px rgba(242, 194, 24, 0.42);
}

.kb-nav__link[aria-current="page"] .kb-nav__idx { color: var(--kb-yellow); }

.kb-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.kb-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--kb-line-strong);
  background: transparent;
  cursor: pointer;
  transition: border-color 0.2s var(--kb-ease), background-color 0.2s var(--kb-ease);
}

.kb-nav-toggle:hover { border-color: var(--kb-green-bright); }

.kb-nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 12px;
}

.kb-nav-toggle__bars i {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--kb-paper);
  transition: transform 0.22s var(--kb-ease), opacity 0.22s var(--kb-ease),
    top 0.22s var(--kb-ease);
}

.kb-nav-toggle__bars i:nth-child(1) { top: 0; }
.kb-nav-toggle__bars i:nth-child(2) { top: 5px; }
.kb-nav-toggle__bars i:nth-child(3) { top: 10px; }

.kb-nav-toggle[aria-expanded="true"] {
  border-color: var(--kb-yellow);
  background: var(--kb-yellow-wash);
}

.kb-nav-toggle[aria-expanded="true"] .kb-nav-toggle__bars i:nth-child(1) {
  top: 5px;
  transform: rotate(45deg);
}

.kb-nav-toggle[aria-expanded="true"] .kb-nav-toggle__bars i:nth-child(2) {
  opacity: 0;
}

.kb-nav-toggle[aria-expanded="true"] .kb-nav-toggle__bars i:nth-child(3) {
  top: 5px;
  transform: rotate(-45deg);
}

/* ---------- 8. 页脚 ---------- */
.kb-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 140px);
  background: var(--kb-ink);
  border-top: 1px solid var(--kb-line);
  color: var(--kb-paper);
  padding-bottom: 28px;
}

.kb-footer__band {
  height: 7px;
  background: repeating-linear-gradient(
    90deg,
    var(--kb-green) 0 56px,
    var(--kb-black) 56px 64px,
    var(--kb-yellow) 64px 72px,
    var(--kb-black) 72px 80px
  );
}

.kb-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.55fr);
  gap: clamp(28px, 4vw, 64px);
  padding-block: clamp(40px, 5vw, 72px) clamp(24px, 3vw, 40px);
}

.kb-footer__wordmark {
  font-family: var(--kb-font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  letter-spacing: 0.02em;
  line-height: 1.1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.kb-footer__wordmark-sub {
  font-family: var(--kb-font-mono);
  font-size: 0.66rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--kb-green-bright);
  text-transform: uppercase;
}

.kb-footer__summary {
  margin-top: 16px;
  max-width: 42ch;
  font-size: 0.94rem;
  color: var(--kb-gray);
}

.kb-footer__contact {
  margin-top: 26px;
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--kb-line);
  padding-top: 18px;
}

.kb-footer__contact-item {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.kb-footer__contact-item dt {
  font-family: var(--kb-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--kb-gray);
}

.kb-footer__contact-item dd {
  font-family: var(--kb-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  color: var(--kb-paper);
  word-break: break-word;
}

.kb-footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 36px);
}

.kb-footer__col-title {
  font-family: var(--kb-font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--kb-paper);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--kb-line);
}

.kb-footer__links {
  display: grid;
  gap: 10px;
}

.kb-footer__link {
  position: relative;
  display: inline-block;
  padding-left: 16px;
  font-size: 0.92rem;
  color: var(--kb-gray);
  text-decoration: none;
  transition: color 0.2s var(--kb-ease), transform 0.2s var(--kb-ease);
}

.kb-footer__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 2px;
  background: var(--kb-green);
  transition: width 0.2s var(--kb-ease), background-color 0.2s var(--kb-ease);
}

.kb-footer__link:hover,
.kb-footer__link:focus-visible {
  color: var(--kb-paper);
  transform: translateX(3px);
}

.kb-footer__link:hover::before {
  width: 12px;
  background: var(--kb-yellow);
}

.kb-footer__ticks {
  height: 14px;
  border-top: 1px solid var(--kb-line);
  background-image: repeating-linear-gradient(
    90deg,
    var(--kb-line-strong) 0 1px,
    transparent 1px 14px
  );
  background-position: 0 0;
  background-size: 14px 7px;
  background-repeat: repeat-x;
}

.kb-footer__base {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
}

.kb-footer__legal,
.kb-footer__copy {
  font-family: var(--kb-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--kb-gray);
}

/* ---------- 9. 按钮 ---------- */
.kb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.78em 1.3em;
  border: 1px solid var(--kb-line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--kb-paper);
  font-family: var(--kb-font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.2s var(--kb-ease), color 0.2s var(--kb-ease),
    border-color 0.2s var(--kb-ease), transform 0.2s var(--kb-ease);
}

.kb-btn--primary {
  background: var(--kb-yellow);
  border-color: var(--kb-yellow);
  color: #1A1300;
}

.kb-btn--primary:hover,
.kb-btn--primary:focus-visible {
  background: var(--kb-yellow-bright);
  border-color: var(--kb-yellow-bright);
  transform: translateY(-1px);
}

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

.kb-header__cta { flex: 0 0 auto; }

/* ---------- 10. 面包屑 ---------- */
.kb-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--kb-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--kb-gray);
}

.kb-breadcrumb a {
  color: var(--kb-blue-soft);
  text-decoration: none;
}

.kb-breadcrumb a:hover { color: var(--kb-yellow); }

.kb-breadcrumb__sep { color: var(--kb-line-strong); }

/* ---------- 11. 章节（纵向长卷开场） ---------- */
.kb-section {
  position: relative;
  padding-block: clamp(56px, 8vw, 120px);
}

.kb-section__head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.kb-section__index {
  flex: 0 0 auto;
  font-family: var(--kb-font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #04220F;
  background: var(--kb-green);
  padding: 5px 12px 5px 9px;
  clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%);
}

.kb-section__title {
  font-family: var(--kb-font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 2.8vw, 2.1rem);
  letter-spacing: 0.01em;
  margin: 0;
}

.kb-section__rule {
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, var(--kb-line-strong), transparent);
}

/* ---------- 12. 标签 / 状态 ---------- */
.kb-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--kb-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.7;
  white-space: nowrap;
}

.kb-tag--scope { color: var(--kb-green-bright); }
.kb-tag--version { color: var(--kb-blue-soft); }
.kb-tag--review { color: var(--kb-orange); }
.kb-tag--key { color: var(--kb-yellow); }

/* ---------- 13. 筛选 chips ---------- */
.kb-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 15px;
  border: 1px solid var(--kb-line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--kb-gray);
  font-family: var(--kb-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  cursor: pointer;
  transition: background-color 0.2s var(--kb-ease), color 0.2s var(--kb-ease),
    border-color 0.2s var(--kb-ease);
}

.kb-chip:hover {
  color: var(--kb-paper);
  border-color: var(--kb-green-bright);
}

.kb-chip[aria-pressed="true"] {
  background: var(--kb-yellow);
  border-color: var(--kb-yellow);
  color: #1A1300;
  font-weight: 700;
}

/* ---------- 14. 面板 / 纸张叠层 ---------- */
.kb-panel {
  position: relative;
  background: var(--kb-ink);
  border: 1px solid var(--kb-line);
  border-radius: var(--kb-radius);
  padding: clamp(18px, 2.4vw, 28px);
  box-shadow: 0 30px 60px -46px rgba(0, 0, 0, 0.95);
}

.kb-panel--paper {
  background: var(--kb-paper);
  color: #0B0F0E;
  border-color: rgba(11, 15, 14, 0.14);
}

.kb-panel--paper h2,
.kb-panel--paper h3 { color: #0B0F0E; }

.kb-panel--paper .kb-tag { color: #166B3C; }

/* ---------- 15. 展开式内容组 ---------- */
.kb-disclosure-group {
  display: grid;
  gap: 10px;
}

.kb-disclosure {
  background: var(--kb-ink);
  border: 1px solid var(--kb-line);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.24s var(--kb-ease), background-color 0.24s var(--kb-ease);
}

.kb-disclosure[data-open="true"] {
  border-color: rgba(242, 194, 24, 0.45);
  background: #12241C;
}

.kb-disclosure__trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  border: 0;
  background: none;
  text-align: left;
  font-family: var(--kb-font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--kb-paper);
  cursor: pointer;
}

.kb-disclosure__trigger::after {
  content: "";
  flex: 0 0 auto;
  margin-left: auto;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--kb-green-bright);
  border-bottom: 2px solid var(--kb-green-bright);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.24s var(--kb-ease), border-color 0.24s var(--kb-ease);
}

.kb-disclosure[data-open="true"] .kb-disclosure__trigger {
  color: var(--kb-yellow);
}

.kb-disclosure[data-open="true"] .kb-disclosure__trigger::after {
  border-color: var(--kb-yellow);
  transform: rotate(-135deg) translate(-2px, -2px);
}

.kb-disclosure__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.24s var(--kb-ease);
}

.kb-disclosure[data-open="true"] .kb-disclosure__panel {
  grid-template-rows: 1fr;
}

.kb-disclosure__inner { min-height: 0; overflow: hidden; }

.kb-disclosure__body {
  padding: 0 18px 18px;
  color: var(--kb-gray);
  font-size: 0.94rem;
}

/* ---------- 16. 数据表 ---------- */
.kb-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--kb-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
}

.kb-table thead th {
  padding: 10px 12px;
  text-align: left;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--kb-gray);
  border-bottom: 1px solid var(--kb-line-strong);
  white-space: nowrap;
}

.kb-table tbody td {
  padding: 12px;
  border-bottom: 1px solid var(--kb-line);
  color: rgba(244, 246, 243, 0.88);
}

.kb-table tbody tr { transition: background-color 0.18s var(--kb-ease); }

.kb-table tbody tr:hover { background: var(--kb-green-wash); }

/* ---------- 17. 刻度尺 / 图形装饰 ---------- */
.kb-ruler {
  position: relative;
  height: 16px;
  border-bottom: 1px solid var(--kb-line-strong);
  background-image: repeating-linear-gradient(
    90deg,
    var(--kb-line-strong) 0 1px,
    transparent 1px 16px
  );
  background-size: 16px 8px;
  background-repeat: repeat-x;
}

/* ---------- 18. 图片容器（页面阶段放图） ---------- */
.kb-media {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--kb-line);
  border-radius: 14px;
  background: var(--kb-ink);
  isolation: isolate;
}

.kb-media__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.08) brightness(0.94);
}

.kb-media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(11, 15, 14, 0.04) 38%, rgba(11, 15, 14, 0.74) 100%),
    linear-gradient(90deg, rgba(31, 138, 76, 0.22), rgba(46, 125, 247, 0.14));
}

.kb-media__ph {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    135deg,
    rgba(31, 138, 76, 0.2) 0 16px,
    rgba(16, 32, 26, 0.92) 16px 32px
  );
}

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

.kb-media--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}

.kb-media--grid::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image: linear-gradient(90deg, rgba(244, 246, 243, 0.16) 1px, transparent 1px);
  background-size: calc(100% / 6) 100%;
}

.kb-media__cap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 3;
  padding: 4px 11px;
  border: 1px solid var(--kb-line-strong);
  border-radius: 999px;
  background: rgba(11, 15, 14, 0.76);
  font-family: var(--kb-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--kb-paper);
}

/* ---------- 19. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--kb-ease), transform 0.6s var(--kb-ease);
}

[data-reveal="x"] { transform: translateX(-12px); }

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

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1060px) {
  :root { --kb-header-offset: 96px; }

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

  .kb-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: block;
    padding: 10px;
    max-height: min(72vh, 540px);
    overflow-y: auto;
    background: rgba(11, 15, 14, 0.97);
    border: 1px solid var(--kb-line);
    border-radius: 22px;
    box-shadow: 0 34px 60px -30px rgba(0, 0, 0, 0.95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.2s var(--kb-ease), transform 0.2s var(--kb-ease),
      visibility 0.2s linear;
  }

  .kb-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .kb-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .kb-nav__item {
    border-bottom: 1px solid var(--kb-line);
  }

  .kb-nav__item:last-child { border-bottom: 0; }

  .kb-nav__link {
    justify-content: flex-start;
    padding: 14px 12px;
    border-radius: 12px;
    font-size: 1rem;
  }

  .kb-nav__link[aria-current="page"] { box-shadow: none; }

  .kb-brand__tag { display: none; }
  .kb-header__section { display: none; }

  .kb-footer__inner { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 860px) {
  .kb-span-3,
  .kb-span-4,
  .kb-span-5,
  .kb-span-6,
  .kb-span-8,
  .kb-span-9 { grid-column: 1 / -1; }

  .kb-footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  :root {
    --kb-gutter: 16px;
    --kb-header-offset: 90px;
  }

  body { font-size: 16px; }

  .kb-capsule {
    width: calc(100% - 20px);
    margin-top: 10px;
    gap: 8px;
    padding: 8px 8px 8px 12px;
  }

  .kb-header[data-condensed="true"] .kb-capsule { margin-top: 6px; }

  .kb-header__cta { display: none; }

  .kb-brand__mark { min-width: 34px; padding: 6px 8px; }

  .kb-footer__nav { grid-template-columns: minmax(0, 1fr); }

  .kb-footer__base { flex-direction: column; align-items: flex-start; }

  .kb-footer__contact-item { grid-template-columns: minmax(0, 1fr); gap: 2px; }
}

/* ---------- 21. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

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